The opening size also plays a non-negligible role in the production test of the entire mold. Therefore, in most cases, when designing irregular deep-drawn parts, a cavity is often left for deep-drawn part design.
1. Stretch material.
If the customer is not strict with the material requirements, and the repeated test model does not meet the requirements, you can replace the material with good tensile properties and try again. Good material is half the battle, and stretching cannot be ignored. The cold-rolled steel plate is mainly 08Al.08.08F.10.15.20 steel, and the amount used is 08 steel, which is divided into boiling steel and stable steel. The price of boiling steel is low and the surface quality is good, but the deviation is serious, and the phenomenon of strain aging is prone to occur. The foreign steel grade adopts Japanese SPCC-SD deep drawing steel, and its tensile properties are better than 08Al.
Second, the surface processing of the drawing die.
In deep drawing, especially stainless steel plate and aluminum plate are easy to produce drawing when deep drawing, and tensile fracture is serious.
3. Determine the blank size.
The more wrinkled the die, the less the crack is our principle. High positioning accuracy and high precision. Under the same stretching conditions, when the rotating body is pulled out, the thickness of the blank will change, but its thickness is basically the same as the original thickness. According to the same principle, the blank area and the drawn area (if needed to adjust, trim the allowance). But wire drawing is more complex in shape and process, and sometimes becomes thinner. Now, there is a lot of software for 3D that can extend the calculation of materials.
Answer: Test data.
A product needs to go through several processes, usually one process is blanking. Through the calculation of the unfolded material, the shape and size of the blank have been fully understood, and the overall size of the droplet mold has been determined. After the mold design is completed, the convexity and concavity of the mold cannot be processed. The blank is first machined by wire cutting. If the blank is relatively large, it can be milled with a milling cutter and then clamped), and then the size of the blank is determined by repeated tests of the subsequent wire drawing process, and then the die punch is processed.
The above is the relevant content of mold design in drawing mold processing. Friendly advice. If the trial die is cracked, try applying lubricant (rapeseed oil, soapy water) to the lower die, or covering the die compound with a film wrap to get results. Proper antipyretic process can improve the plasticity of the material and reduce the multiple stretching of the parts. Hope the above will help readers.Read More →