Wilaâs standard program consists of a wide variety of New Standard, European Style and American Style top tools (BIU), bottom tools (OZU), holders (HU), adaptors (TSU) and Dutch bending tools (DDU). 

 If this standard program does not offer an adequate solution to specific bending problems, there is always the possibility of specialty products, such as top tools (BM), bottom tools (OM), Dutch bending tools (DD) and holders for flat-bending tools (HU). In addition, Wila has Custom Made models (B, O, OZ, RS and MVM) in its program. 
Despite differences in function, geometry, and clamping principle, all of the tools in the BIU, OZU, HU and DDU series have a number of common properties:

ð All of the tools are made from steel composed specifically for this purpose that has high tensile strength, toughness and load-bearing capacity.
ð The tools are ground with extremely high precision. This precision guarantees the exchangeability of the tools.
ð The bending radii of the tools are 
CNC deephardened. As a result, the tools are suitable for bending nearly every type of material while wear is minimized and their economic life is drastically increased.
ð BIU and OZU tools are available for both air bending and bottom bending.
ð All tools are modular and available in a large number of standard lengths. Using these sets, any length can be achieved with 5 mm / 0.2ä increments.
ð All tools are clearly marked with the necessary user information.

Specials

Tools with special geometry (BM and OM)             
Wila also offers special tools in its product range. The design of these tools depends on factors like product shape, sheet thickness, the required inside radius, and the selected adaptation system. The bending method (air bending or bottom bending) is another important factor. These tools are available in virtually any design, in any length and with various surface 
hardenings. The profile section of the tool can be milled, planed or ground, as desired.
The BM and OM tools can be supplied upon request with a New Standard (in this case, head or shoulder-bearing as desired), European Style or American Style tang. All of the tools of the type BM and OM can be supplied in four standard lengths:
ð A relatively short standard length of 515 mm / 20.27ä, making this tool very easy to handle; this length is specified as follows: BM or OM-xxx/1.
ð A length of 550 mm / 21.65ä for the standard segmented set, specified as BM or OM-xxx/2.
ð A length of 200 mm / 7.87ä for two additional segments, 100 mm / 3.94ä each. This length is specified as BM or OM-xxx/3.
ð A length of 200 mm / 7.87ä.This length is 
specified as BM or OM-xxx/6. 
Using these sets, any length can be made in 
5 mm / 0.20ä increments.
With the New Standard tang, parts with a length of up to 100 mm / 3.94ä can be equipped with one Safety-Click per length; parts longer than 100 mm / 3.94ä can be equipped with two Safety-Clickâs. For safety reasons, Safety-Clickâs are used for tools weighting up to 12.5 kg / 28 lbs. If the tool weights more than 12.5 kg / 28 lbs, it is equipped with locking pins and can only be changed horizontally. For weights of more than 25 kg / 56 lbs, the tools are equipped with safety keys.


Bottom Tool with New Standard tang (OM 0 - 599) 
The demand for tools of this type is gradually increasing because New Standard Clamping is becoming increasingly popular for both top and bottom tools. This offers the considerable advantage that top tools can be used in the bottom clamps and bottom tools can be used in the top clamps (fig. 5.34). This advantage is especially evident when a robot is used to manipulate the sheet: the sheet no longer needs to be rotated for bending in the opposite direction. Automatic tool changing (ATC) for both the top and the bottom tools is possible in this manner. All bottom tools in Wilaâs New Standard OZU program can also be supplied with a New Standard tang upon request.
Tools with a V opening of up to 24 mm / 0.945ä are equipped with a head bearing mount. In order to safeguard their stability, 
V-dies with an opening larger than 24 mm / 0.945ä have a shoulder bearing tang.


Dutch Bending tools (DD)                                        
Dutch bending tools (often called hemming tools or flattening tools) are used to pre-bend the sheet and then press it closed. This technique is used, for example, to finish the sharp edges of the ends of a sheet or to reinforce the sheet and thus strengthen the bent product.
Depending on the available tonnage and the sheet to be bent (material type and thickness), the sheet can be pressed closed to a greater or lesser extent. The force table on the left lists the tonnages required for closing the sheet for mild steel 42kN/cm2 = 42 x 1450 = 60900 psi and for stainless steel 70 kN/cm2 = 70 x 1450 = 101500 psi. The values as indicated may deviate slightly in actual practice.

A variety of tools in the Wila program can be used to perform this bending operation. Hammer tools are used if hamms are some-times made, and are usually applied in combination with a 30¡ top and bottom tool. With reference to the transverse 
forces occurring when flattening the sheet, we advise that these tools be used on sheets that are no more than 2 mm / 14 gauge thick.

Using the New Standard top tool type BIU 051, for example, combined with bottom tool type OZU 081, a Dutch bending combination can be created that can be used for both pre-bending and flattening. An advantage is the fact that this tool can also be used for universal bending. Because the design of the configuration is centric, no sliding mechanism is required. Here too, we advise a maximum sheet thickness of 2 mm / 14 gauge.

The spring-action Dutch bending tool, consisting of a holder with a spring-action Dutch bending part, is another option. When combined with a 30¡ top tool, the sheet can be pre-bent and then hemmed. Because the V opening can be adjusted to suit the sheet thickness, short flange lengths can be bent. The range of products includes a number of standard designs, type DDU.
A variety of other designs are also available.
As a modern version of the spring-action Dutch bending tool, Wila offers the hydraulic Dutch bending tool. The pressing part is not operated by spring action (by which the inactive tool is always open), but is powered by hydraulic cylinders incorporated in the tool. The inactive tool is therefore in a closed position, and simultaneously serves as a tool holder. This means that the tool does not need to be removed from the machine after each use. Interchangeable tools can be placed in the Dutch bending part, making it possible to adjust the size of the V opening as desired. 


Wila offers a modified hydraulic unit for this purpose, type D6.

The spring-action and hydraulic Dutch bending tools can be mounted on the machine in a number of ways:
ð separately on the press brakeâs table;
ð in the clamping slot in the table or lower beam using a clamp holder. The clamp holder is bolted and normally attached at intervals of approximately 0,5 meter / 20ä .
ð directly on the lower beam. In this case, there are two options: the lower beam is equipped with a pattern of holes,  or the lower beam is equipped with threaded holes. In both cases, the hole pattern is available upon request. Here too, the hole pattern can be modified to suit the customerâs needs.
Both models can be standardly equipped with additional M16 holes 200 mm / 7.87ä center to center, so that support arms and such can be attached. Because of their universal application, in practice the hydraulic Dutch bending tools are often attached to the lower beam.
The bottom tools used with the hydraulic Dutch bending tool can be clamped in the tool in one of two ways:
ð mechanically, using standard clamping bolts 100 mm / 3.94ä center to center. This method is used for the types DD 005 and DD 006.
ð hydraulically, using a hydraulic clamping bar A2. This variation is used for the types DD008 and DD009.
The advantage of the hydraulic clamp A2 as compared to normal set screws is that the bottom tools can be clamped in a single motion via the central controls. This can be parallel-switched to a New Standard tool clamping system. A hydraulic unit Type HM6 can also be supplied. Moreover, this creates a continuous clamping line, meaning that even small segments can be clamped at any point of the clamping holder.