Press Brake Bending Tooling System
Bending tools used by bending machine to form and process sheet metal. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of object shape through the change of the physical state of the formed material. A tool used to make a blank into a piece with a specific shape and size under the action of the pressure of the bending machine.
Press brake bending tools included top punch and bottom dies, it's designed with standard bending features or customized according to final sheet bending profiles.
CNC Press brake tools mainly adopts 42CrMo material, which mainly requires high strength, high toughness and good wear resistance. The service performance can be met, the process performance is good, and the price will be high. 42CrMo is an alloy quenched and tempered steel with high strength, high strength and strong toughness
High quality press brake tools should be choose reasonable solution of heat treatment process. Heat treatment error is an important reason for the early failure of CNC press brakes tooling. Bending machine Die heat treatment includes annealing after steel forging, high-temperature tempering or low-temperature tempering after rough machining, quenching and tempering after finishing, discharge, stress relief and low-temperature tempering after wire cutting. Only when the cold and hot processing is well matched, can a good die life be guaranteed.
Some points must be pay attention when using CNC Press brake tools:
01, Why 88 degree tools can bending 90 degree sheet profiles.
Any type of sheet material have spring back value once depress, common mild steel could be 1-2 degree spring back, stainless steel sheet maybe over 4 degree, High tensile strength material bending sometimes have over 10 degree spring back value, that's why 86 degree tools designed for stainless sheet, 80 degree designed for bending Hardox sheet, bending pressure will also affect final sheet bending angles, especially when use press brake for forming parts.
02. What is the quenching hardness of CNC Press brake bending tools. The heat treatment of bending machine die is HRC47 ± 2 degree . Too high hardness is easy to cause tools cracked, as not durable with high hardness. The quenching hardness of the bending machine mold can reach, which can only be determined according to the material of the bending machine mold and the style of the bending machine mold. But it's not easy to use with high hardness. Generally, the reasonable hardness is hrc47 ± 2 degree
03. When bending the acute angle or pressing forming parts, it should be above 30 degrees, first bending the acute angle and then pressing the bottom edge. When bending R angle, R upper die and R lower die shall be selected.
04. When bending a longthin workpiece, it is best not to use small segmented die to reduce the tool receiving indentation, and it is best to use a single groove, the outer angle R of the lower die V groove of the single groove is large, so it is not easy to produce bending indentation.
05. When bending products with extremely high tensile strength sheet or too thick plate, it is strictly prohibited to use the standard top punch, which is easy to damage the mold, and it is not allowed to use the tools for bending reinforcement or other cylindrical products.
Finally, when the bending machine die is used up, it should be put back on the die frame in time and put it well according to the mark. The dust on the die should be cleaned frequently so that it can be used more accurately next time
All kinds of sheet bending or forming tools are all available from AHYW China Yawei factory, American style, Wila/Trumpf press brake tools, Euro standard press brake tools, special forming tools, customized press brake top punch and bottom die manufcture in China.
