The rules of press brake tool selection

Many consider press brake tooling a minor accessory in metal forming when in fact the opposite is true. Although press brakes have evolved into multiaxes, high-precision machines with self-stabilizing features, the tooling is all that ever actually touches the part during bending (see Figure 1).

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The line has blurred between RFA, New Standard, European, and American standard tooling. Many features needed for high-performance bending have migrated to all the various tooling types. Regardless of which tooling and clamping style you choose, be sure it meets at least a few minimum requirements.

High precision. The tools should be manufactured to tolerances within the 0.-inch range. This is critical to achieve part accuracy without shimming or other tweaks during setup.

Segmented sections. These allow you to build various lengths out of several precut pieces. Small pieces are safer and easier to handle too.

Self-retaining installation. You should be able to load the tools with the ram up. The toolholding system should hold multiple pieces in place until the clamping pressure is applied (see Figure 2).

Self-seating. As clamping pressure is applied, the punches are mechanically pulled up into position. This eliminates the need to bottom the punch into the die during the setup.

Front loading. You should be able to install tools from the front of the machine. This shortens setup time because you no longer need to spend time sliding tools from the end of the press brake. In most cases, front loading also eliminates the need for forklifts and overhead cranes.

Standard sizes. Common-height tools can reduce the need for machine adjustments when changing jobs. Front support arms, backgauge heights, and safety devices all remain at a common position. And because tools are made to the same heights, you can add off-the-shelf pieces and be sure they will match your existing tools.

Many high-quality press brake tools are made to metric standards. So a nominal sized 0.250-in. V opening is actually 6 mm, or 0.236 in. Moreover, bends in sheet metal have slightly elliptical corner radii, so you only have to get close to get correct. For simplicity, imperial dimensions are rounded in this article.

Note that the discussion that follows focuses on air bending, and for good reason. The trend is to abandon bottoming or coining and embrace air bending whenever possible. Be aware, however, that not all parts can be produced using classic air bending techniques.

Operators throughout the industry use very different tooling to make parts of similar or identical quality. Plenty of operators make acceptable parts with incorrect tooling because they don&#;t have access to the correct tooling. They make it work; but &#;making it work&#; isn&#;t efficient or repeatable, and it can seriously hinder work flow. Best practices in tooling selection really should have one elegantly simple goal: to achieve the best-quality parts in the least amount of time possible.

What Tools Do You Need and Why?

A maintenance shop will need and use different press brake tools than a custom fabricator will. So before diving into specifics, identify your needs and budgetary constraints.

For instance, you might need additional tools to shorten setup times. You might follow lean manufacturing principles and recognize the benefits of having a separate tool library for each press brake&#;and hence, be willing to invest in duplicate sets of tools stored at machines. You don&#;t lose valuable setup time walking to and from the tool crib and elsewhere looking for the correct tools. An added benefit here is that tool style compatibility from machine to machine is no longer necessary, because the tools tend to stay with their intended machine (see Figure 3).

If you need to buy additional, duplicate tools to expand each brake&#;s dedicated tool crib, choosing them is relatively straightforward. You&#;ll often find these tools located in convenient places, if not already in the press brakes. Look for the tools with the most wear and tear&#;those with shiny, bright working surfaces. The body of the tools will likely be clean and bright too. Rusty, dirty tools on the bottom of the rack are not likely candidates.

Die Selection

To get the biggest bang for your buck, choose a minimum number of lower dies that will cover the entire range of metal thicknesses your shop forms. Shops with little tribal knowledge, unforeseen applications, and limited budgets should try selecting lower dies using the 8×2 rule.

First, determine the range of metal thicknesses you want to bend. For example, you might need to bend material 0.030 in. through 0.250 in thick.

Second, assess the smallest V die needed by multiplying the thinnest metal by 8. In this case, 0.030-in. material would need the smallest die, hence: 0.030 × 8 = 0.24, which we&#;ll round up to 0.25.

Third, assess the largest V die needed by multiplying the thickest metal by 8. In this case, the thickest material of 0.250 in. would need the largest die: 0.250 × 8 = 2.

You&#;ve now determined the smallest and largest die you need&#;0.25 and 2 in. To fill in what you need in between, you start with the smallest V die and double its size. In this case, that gives you a 0.5-in. die (0.25 × 2 = 0.5). Next, double the 0.5-in. die to get 1.0 in., then double that to get 2.0 in. This gives you a minimum of four different V-die openings to bend 0.030- to 0.250-in. material: 0.25, 0.5, 1.0, and 2.0 in.

Punch Selection

You also use material thickness to determine the minimum number of upper punches. For material 0.187 in. and thinner, you can use an acute offset knife punch with a 0.04-in. radius. The acute angle allows bending past 90 degrees, and the offset allows you to form J shapes. To handle the higher forces when forming material between 0.187 and 0.5 in. thick, consider a straight punch with about a 0.120-in. radius.

Note that for some applications, including those using thicker and high-tensile material, the workpiece tends to crease, crack, or even split in two when using common industry bending standards. It comes down to physics. A narrow punch tip exerts more force on the bend line; combine that with a narrow V-die opening, and the forces rise even more. For challenging applications, and especially when material thicknesses are above 0.5 in., it is best to consult your material supplier on the recommended punch tip radius.

The Rule of 8

In a perfect world, you should be able to select the V-die opening using what we call the rule of 8; that is, the V-die opening should be 8 times the material thickness. To determine this, multiply the material thickness by 8 and choose the closest available die. So if you have 0.060-in.-thick material, you need a die that&#;s 0.5 in. (0.060 × 8 = 0.48; 0.50 in. is the closest die width); for 0.125-in. material, you need a 1-in. die (0.125 × 8 = 1). This ratio gives the best angular performance, which is why many call it the &#;sweet spot&#; for V-die selection. Most published bending charts are centered around this formula.

Simple enough? Well, it would be in that perfect world, and you could live in that perfect world if the sheet metal designers always followed the rule of 8. But alas, in the real world, the exceptions abound.

V-die Opening Determines the Radius

When air bending mild steel, the inside bend radius forms at approximately 16 percent of the V-die opening. So if you air-bend material over a 1-in. V die, your inside bend radius will be about 0.16 in.

Say a print specifies 0.125-in. material. In a perfect world, you&#;d multiply that thickness by 8 and use a 1-in. V die. Simple enough. But many sheet metal designers like to specify a bend radius equal to the metal thickness. What if the print specifies an inside radius of 0.125 in.?

Again, material air-bends an inside radius that&#;s about 16 percent of the die opening. This means your 1-in. die can produce a radius of 0.160 in. Now what? Just use a narrower V die. A 0.75-in. die will give you an inside radius that will be close to 0.125 in. (0.75 × 0.16 = 0.12).

Similar thinking applies for prints that specify larger bend radii. Say you need to form 0.125-in.-thick mild steel to a 0.320-in. inside bend radius&#;more than double the material thickness. In this case, you&#;d choose a 2-in. die, which would produce an inside bend radius of about 0.320 in. (2 × 0.16).

There are limits to this. For instance, if you find that to achieve the specified inside bend radius you need a V-die opening that&#;s less than five times the metal thickness, you will compromise angular accuracy, possibly damage the machine and its tooling, and put yourself in a very unsafe situation.

Minimum Flange Length

Keep flange lengths in mind when choosing your V dies. The minimum flange a given V die can form is approximately 77 percent of its opening. So a part being formed over a 1.-in. V die will need at least a 0.77-in. flange.

Many sheet metal designers like to save metal and specify a flange that&#;s too short, like a 0.5-in. flange in 0.125-in. material thickness (see Figure 4). According to the rule of 8, 0.125-in.-thick material calls for a 1-in. V die&#;but that 1-in. V die requires the workpiece to have a flange that&#;s at least 0.77 in. Now what? Again, you can use a narrower V die. For instance, a 0.625-in. die can form parts with flanges as short as 0.5 in. (0.625 × 0.77 = 0.48, rounding up to 0.5).

This also has limits. Just as with tight inside bend radii, if a flange requires a die width that&#;s less than five times the material thickness, you&#;ll experience angular accuracy issues, cause possible damage to the machine and its tooling, and put yourself in harm&#;s way.

Punch Selection Rules

For L shapes the rules are &#; there are no rules. Almost any punch shape will work. So when selecting punches for a group of parts, you always should consider these L-shaped parts last, considering just about any punch shape can handle them.

When forming these L shapes, use a punch that also can form other parts, rather than adding unnecessary tools to the library. Remember, when specifying tooling, less is always best&#;not just to minimize tooling cost, but also to reduce setup time by reducing the number of tool shapes needed on the shop floor (see Figure 5).

Other shapes do require specific rules for punch selection. For instance, when forming J shapes, the rules are (see Figure 6):

• When the small up-leg is longer than the bottom leg, you need a gooseneck punch.
• When the small up-leg is shorter than the bottom leg, any punch shape will work.
• When the small up-leg is equal to the bottom leg, you need an offset acute punch.

As you can see, the punch selection rules deal mostly with workpiece interference, and this is where bending simulation software can play an important role. If you don&#;t have access to bend simulation software, you can use your tooling supplier&#;s drawings with grid backgrounds to check for punch-part interference manually (see Figure 7).

Offset Rules

If you&#;re using a conventional toolset, you&#;ll need to use two ram cycles to form offsets or Z shapes. For these shapes, the rules are (see Figure 8):

• The center leg (web) must be larger than half the V-die body width; note that this is the entire die body width, not the V-die opening.
• The side leg must be shorter than the V-die height plus the riser height.
• When the center leg (web) is less than half the width of the V-die body, you&#;ll need a special tool that forms both bends in one ram stroke. The upside with these form tools is you do not need to flip the plate over. The downside is they require about three times the standard air bending force.

Rules for Bending Across Cutouts and Miters

Any unsupported material inside the V die is subject to deformation; in holes and other cutouts, this deformation manifests itself as blowouts (see Figure 9). When the holes near the bend lines are small, the associated blowout will be small too. Also, most applications will accept some distortion, so there is no definitive rule on the best V-die width to choose when a cutout is on or near a bend line.

When the flanges, cutouts, and miters are clearly too close to the bend line for the metal thickness, you can specify rocker-type dies. The rockers rotate and support the material throughout the entire bending process and, thus, eliminate the blowout.

Figure 9 shows identical parts with cutouts close to the bend lines; the foreground one&#;with the telltale blowout&#;was formed using a conventional V die; the background one was formed with a rocker-type die. Also note that the two ovals on the left have the same width (front to back) and are the same distance from the bend line; only their lengths are different. You can clearly see more blowout on the longer oval.

Punch Height for a Given Box Depth

Punch height becomes critical when forming three- and four-sided boxes. In some cases, short punches can form three-sided boxes if one formed side can hang off the side of the press brake during the final (third) bend. If you&#;re forming four-sided boxes, you need to choose a punch tall enough to span the box height diagonally (see Figure 10):

Minimum punch height for box bending = (Box depth/0.7) + (Ram thickness/2)

If there are no top (return) flanges, or the top flanges protrude outward, you won&#;t need much clearance between the top punch and lower die to remove the part after bending. But if you do have return flanges (top flanges that protrude inward) on all four sides, you need enough clearance to twist and remove the box after bending.

Combination Bend and Hem

Bend-hem tools can form parts with hemmed edges in a single setup, as shown in Figure 11. Just know that if you need to hem thicknesses greater than 0.125 in., you might need custom tools to accommodate the excessive forces required.

V-die opening selection rules here are basically the same as for standard bending tools. The 30-degree prebends for the hems do require somewhat longer minimum flanges&#;at 115 percent of the selected V-die opening&#;because of the acute angles. For instance, if you&#;re forming material over a 0.375-in. V die, you&#;d need the flange to be at least 0.431 in. (0.375 × 1.15).

Scratch-free Parts

Almost all typical V-die bending tools leave some marks on the part, simply because the metal is being drawn into the die while bending. In most cases the marking is minimal and acceptable, and increasing the shoulder radius can reduce the markings.

For applications where even minimal marking is not acceptable, like when bending prepainted or polished materials, you can use nylon inserts to eliminate scratching (see Figure 12). Scratch-free bending is especially important for fabricating critical aircraft/aerospace parts, because it&#;s hard for inspectors to visually inspect a piece and tell the difference between a scratch and a crack.

Simplicity Is a Virtue

Today&#;s precision tooling and press brakes can reach unprecedented levels of accuracy. And with the right tools and consistent material, a press brake operation can bend a flange to a specific angle with a specific inside bend radius. But again, air bending forms the inside bend radius to a percentage of the die opening&#;and having the right tools matters. Specifying a multitude of different, tightly toleranced radii will increase tooling costs. And the more tools you need, the more changeovers you&#;ll have, which increases costs even more.

That said, sheet metal part designers can make tooling selection and the overall bending operation much easier if they follow a few basic rules when designing parts:

1. The inside bend radius should be 1.5 times the metal thickness.
2. The flange length should be at least six times the metal thickness. This applies to holes in the part too; that is, holes should be located away from the bend line at a distance that&#;s at least six times the material thickness.

3. The offset (Z shape) web dimension should be at least 10 times the metal thickness.

Exceptions to these rules abound, and each comes with complications. You can use a narrower V-die opening to bend a tighter radius or a shorter flange&#;but bend too sharp a radius and you risk creasing the bend line and exceeding the tonnage rating for the tooling and press brake. You can bend a narrower offset, but again, that requires a special tool and significant forming tonnage.

If a part doesn&#;t need a short flange, a narrow offset, or a tight radius, why complicate matters? Follow these three simple rules and you&#;ll improve angular performance, shorten setup time, and reduce tool cost.

Paul LeTang is product manager, press brake/tooling at Bystronic Inc.

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Abstract: If you or your company are considering purchasing a press brake to increase the processing capability of parts and improve production efficiency, please read the following information carefully. This could be of assistance to you or your company.

Many corporate decision-makers have experienced economic losses due to purchasing the wrong equipment.

I am not overstating when I say that this scenario occurs frequently.

Hycules has been manufacturing sheet metal processing equipment for several decades, and we have witnessed many such incidents.

However, suppose you are willing to take the time to conduct thorough research. In that case, you can clearly understand the type of press brake you or your company needs, the critical factors to consider when purchasing a press brake, and how to make the correct and practical decision.

For a company looking to purchase a press brake, the manufacturers will provide various pricing options with multiple configurations.

However, as a buyer, considering all factors can be challenging. Where should you start to decide which type of press brake to choose?

The best approach is to assess your or your company&#;s needs and use them as the core criteria when selecting a press brake.

Where should you start? The following press brake purchasing guide may be helpful to you or your company. Let&#;s delve into it together.

What is a press brake?

You may already know the definition of a press brake, but we still want to emphasize what it is.

Many first-time buyers of press brakes or those purchasing them for their companies may need to become more familiar with what it is.

Bending machines are used to bend sheet metal and consist of a table, ram, backstop, and hydraulic cylinders. Using simple punches and dies, we can easily bend sheet metal and shape it into a specific geometry.

The size of the opening in the V-groove of the lower die varies when turning different thicknesses of sheet metal and the required bending pressure varies. (The bending pressure required can be calculated from the bending pressure table.)

What are the commonly overlooked considerations when purchasing a press brake?

1. Market share

In today&#;s online ecosystem, when you search for a product online, you will likely see many manufacturers exaggerating their effects while discrediting their competitors. However, the most reliable product quality indicator is often its market share. You can determine which machines and equipment are widely used and well-received in different industries based on user feedback and which could be better and recommended. User feedback and reputation are essential because they offer primary perspectives and direct interaction with the product. We recommend paying attention to this feedback.

2. Enterprise scale

When considering a product purchase, it&#;s essential to feel the manufacturer&#;s reputation and the quality of their after-sales service. In today&#;s internet age, it can take time to discern a company&#;s trustworthy reputation from marketing claims. However, by examining the market share of a particular product brand in your industry, you can better understand its popularity and reliability.

It&#;s also essential to look for a reputable and healthy company, as this often indicates that they are trustworthy and can provide reliable after-sales service for users. To assess a company&#;s scale and strength, it&#;s recommended to personally visit their factory to understand their formalities and production strength. If a visit is not possible, online factory inspections can also be conducted through video or other online methods.

Hycules Machinery considers the different situations of users and provides online factory inspection services. Click here to start your online factory inspection journey.

3. Machine quality

The two points above are common sense terms that have nothing to do with the machine itself. Now let&#;s discuss the quality of the machine.

If you are not yet familiar with bending machines, comparing the quality of the machines may require a lot of work.

The size and weight of the machine are key factors to consider. As a rule, wider and heavier machines are stronger and of higher quality, as they use mainly steel in the machine.

Additional resources:
Unleashing the Power of Permanent Magnet Variable Frequency Screw Compressors

Want more information on Hydraulic Guillotine Shearing Machine? Feel free to contact us.

Another key factor is precision. Ideally, you can bring (or ship) the parts to be machined to the factory to test the accuracy of the machine, but this is only sometimes possible. The accuracy of the machine is influenced by the backstop, the strength of the machine body and the tooling.

If the backstop is still chain driven, the accuracy of the machine cannot be guaranteed. Aluminium beams may look attractive, but they may warp after repeated impacts.

The third important factor is the screw and guide. The best companies often choose to use ball screws and linear guides.

Finally, the strength of the body strut is directly related to the thickness of the sheet chosen. If the container is too thin, the strength of the body will be significantly reduced.

4.Punches and dies

If we compare bending machines to soldiers, the tools are their weapons. If these weapons could be of better quality, it would be easier to defeat the enemy.

So, how do we evaluate the quality of the workpiece?

The most critical factor is the material used. Currently, 42CrMo is considered a good quality material for bending machine tooling, while other materials, such as Cr6W2Si, are also considered to be good choices. The average user may need to learn about this to differentiate between these materials.

In addition, most moulds are high-frequency hardened. Some manufacturers use moulds that are only heat treated at the cutting edge. However, high quality manufacturers will use moulds that have been heat treated throughout.

Fully heat treated moulds have a hole in the mould, which is a clear sign of a general heat treatment.

It is worth noting that a fully heat treated tool is much more expensive to manufacture than a tool with a heat treatment at the cutting edge only.

Four guidelines for choosing a bending machine

When selecting a bending machine, the following four principles must be considered:

Principle one: the accuracy of the operation of the mechanical system.

It is well known that certain physical errors in bending radius are unavoidable, but what is of concern is the degree of deviation that can be tolerated by the user. For relatively uncomplicated machined parts, small differences in accuracy are acceptable. Nevertheless, most machined parts usually require high accuracy, mainly when these parts are used in production after bending.

Principle 2: The flexibility required by the mechanical system.

The greater the variety of parts to be machined, the greater the flexibility required of the bending machine. In other words, the hardware and software components of the bending machine should be designed to be user-friendly. It should allow for easy expansion to ensure maximum cost-efficiency. In this way, the time required to adjust the bending machine parameters can be minimised even if the user&#;s processing instructions change frequently and are repeated very few times.

Principle 3: Determine the capacity and size of the bending machine.

When selecting a bending machine, it is necessary to consider the size of the part, the pressure, the bending length, the stroke and the height of the structure.

Principle 4: The potential customer should also carefully consider the end use of the machine, the potential known deformations and the bending radius of the parts to be processed.

Seven factors to consider when buying a bending machine.

Bending machines differ from other CNC machines in terms of processing and technology. As a user of a machine, you must consider all relevant factors such as application, deflection, bending radius and other machined parts before purchasing a bending machine.

As a decision maker for equipment procurement, you must understand a press brake&#;s performance, processing range, functions, and precision.

This is a matter of concern, as any wrong decision can increase production and possibly unrecoverable costs.

Therefore, before purchasing a press brake, consider the following seven factors, which may help you make the right choice.

1. What kind of parts do you want to produce?

Your goal in purchasing a press brake is to efficiently process your production tasks, not to buy the smallest and lightest machine possible. Most importantly, you need to consider the material type of the metal sheet and its maximum thickness and length.

For a stainless steel sheet with a maximum thickness of 3mm and length of mm, an 80-ton press brake utilizing air bending would meet the requirements. However, if you need to use a bottom die, consider purchasing a press brake of about 150 tons.

If you use a low-carbon steel sheet with a maximum thickness of 6mm and a length of mm, a 100-ton press brake is suitable for air bending. However, consider a more significant CNC press brake if you need to use a bottom die.

For metal sheets with a length of mm or less, a smaller CNC press brake is sufficient to meet your needs. This can significantly reduce your purchasing costs. The metal sheet&#;s size is critical in choosing the most suitable press brake.

2. Compensation system

Deflection errors are inevitable in the bending process of CNC press brakes, especially for longer workpieces.

The deflection of the press brake increases proportionally with the length of the workpiece.

Under identical loads, a press brake processing a mm plate will experience four times more deflection compared to processing a mm plate.

In other words, shorter press brakes with fewer shim adjustments can produce higher precision products.

Reducing shim adjustments can also shorten the preparation time of the press brake.
Fortunately, most CNC hydraulic press brakes have added hydraulic deflection compensation during manufacturing, reducing the need for operator adjustments and dramatically improving bending accuracy and production efficiency.

The CNC system controls this function.

An electromagnetic servo valve allows hydraulic oil to flow into the compensation cylinder, which causes the worktable to move upwards. As the working pressure of the press brake increases, the deflection compensation force also increases, efficiently compensating for any deflection.

Automatic offset compensation is another less efficient compensation method.

3. Material type

Compared to regular carbon steel plates, the bending pressure required for stainless steel plates increases by around 50% during the bending process. However, the needed bending pressure decreases by 50% for softer aluminum plates.

The press brake manufacturer can acquire the bending pressure parameters as per the standard.

The following data table shows the bending pressures required for mm metal plates of various thicknesses and materials.

There is also a quick way to calculate the required bending pressure for a press brake. You can use our online press brake pressure calculator to calculate the necessary press brake pressure in tons.

4. Bend radius

During air bending, the opening size of the lower die V-groove should be greater than eight times the thickness of the metal sheet.

For example, if a press brake with a lower die V-groove opening of 12 mm is used to bend a low-carbon steel plate with a thickness of 1.5 mm, the bending radius should be 1.9 mm.

If the bending radius is approximately equal to or smaller than the thickness of the metal sheet, then bottom bending is recommended.

However, in this case, the required bending pressure will be four times that of air bending. When performing air bending, it&#;s essential to take note of the clearance between the upper and lower molds at the punch and die&#;s base, as well as the spring-back force of the metal sheet after being bent to a 90° angle. Typically, the molds will cause the press brake to have a spring back angle of less than 2 degrees during air bending.

Therefore, for standard upper and lower mold bending processes, the angle of the upper mold punch should be between 86° and 90°.

At the bottom of the bending stroke, there should be a gap slightly larger than the thickness of the metal sheet.

5. Bend angle

The punch angle is improved because a larger bottom die is used, with a bending tonnage four times that of the blanking die. This helps reduce the spring back force within the specified bending radius.

Bottom die bending is similar to blanking, with the only difference being that the front end of the punch is converted to the required bending radius. Since the clearance between the top and bottom dies at the bottom of the bending stroke is smaller than the thickness of the metal sheet, and the bending pressure (which is ten times greater than the blanking pressure) is sufficient, this results in a reduction in the spring back force. The front end of the punch will fully contact the metal sheet.

To guarantee the durability of the press brake and ensure high-quality end products, selecting a bending machine that employs the blanking bending technique with a bending radius more significant than the metal sheet&#;s thickness is advisable. This approach ensures high-quality end products while promoting the press brake&#;s long-term use.

6. Bending accuracy

Choosing between a CNC press brake and a conventional press brake depends on the precision required.

A CNC press brake should be considered if a precision of ±0.5 degrees is required and cannot be changed. The repositioning accuracy of the slider can be controlled to within ±0.01 mm.

For high-precision bending workpieces, a high-precision and high-performance press brake is required.

However, the repositioning accuracy of a conventional CNC press brake slider is about ±0.5 mm, which can still produce a deviation of ±2-3 degrees under appropriate conditions.

In addition, CNC press brakes are usually equipped with a CNC controller and quick-change punch fixtures. This should be the primary consideration if you must process many small parts.

7. Punches and dies

The selection of the press brake&#;s die directly impacts the precision of the bending process for metal sheets.

Therefore, it is crucial to inspect the punch and die carefully.

The dies come in various shapes, and different punches and dies are used for other parts.

To achieve the ideal shape of the part, the material&#;s physical properties are mainly changed through the forming process.

Bending dies to process blank materials into parts with specific shapes and sizes under leaning pressure.

The dies used for press brakes are typically classified as either convex or concave, and they serve different purposes in sheet metal stamping and separation. A forming die has a cavity to create a specific shape, while a separation die has a blade to cut the sheet metal.

Bending dies are generally made of T8 or T10 steel, and some better dies may use 42CrMo material, which has higher strength, better toughness, and wear resistance.
Cr12MoV, a type of cold-rolled die steel, is also a highly suitable material for this purpose.

42CrMo is a type of high-strength alloy steel quenched and tempered. It possesses excellent strength and toughness and can operate effectively under temperatures below 500 degrees Celsius. To ensure the longevity of each die, it&#;s crucial to monitor wear and tear regularly. One way to check for wear on each die is to measure the die length directly from the front to the shoulder and the distance between the shoulders.

For standard dies, the allowable deviation per foot should be approximately ±0.001 inches, with a maximum total length deviation of ±0.005 inches.

For precision dies, the deviation per foot should be within ±0. inches, and the total length deviation precision should not exceed ±0.002 inches.

It is best to use delicate dies for CNC press brakes and regular dies for manual and ordinary press brakes.

Final thoughts
Hycules has been serving the press brake manufacturing industry for decades, and we understand the importance of customers purchasing high-quality press brakes. &#;Good&#; refers to quality and includes reasonable prices and high-quality after-sales service.

We have seen too many examples where customers purchased press brakes from small factories, encountered problems without receiving technical support, and eventually contacted us to repurchase equipment. We have also witnessed agents losing a lot of money due to choosing the wrong press brake manufacturer brand.

To prevent these issues, it is highly recommended that you conduct extensive research on your options before making a final decision. Trust us; the time you invest will be worth it.

Learn more about shearing machines, bending machines, and other sheet metal equipment. For the best price, please contact us.

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