The detailed stamping steps of a hydraulic punch are a component of the stamping process, mainly using corresponding accessories for punching. The accuracy of the punch determines the machining accuracy of the workpiece. Therefore, we must pay attention to some issues during the stamping process. In order to avoid damaging the manufacturing of the workpiece, the four common problems of punching die machining are discussed here, and the standard network shares the reasons for these problems.
1. Mold is neutral
The core mold is prone to occur in different positions on each side during use, with some areas having scratches and larger wear occurring faster. This is particularly evident in narrow rectangular molds using hydraulic presses. The main reason for this problem is: (1) Insufficient design of precision machining turrets, mainly due to poor alignment of the upper and lower molds on the wheels. (2) The design and processing accuracy of the mold cannot meet the requirements. (3) The precision of the guide sleeve of the hydraulic punching machine for molds is insufficient. (4) The selection of mold clearance is not appropriate. (5) Due to long-term wear and tear of tools or mold guide sleeves, it is not good for neutrality.
In order to prevent inconsistent mold wear, it should be: (1) ordinary machine tools use core rod turrets to adjust to neutral inspection and installation. The guide sleeve (2) should be replaced in a timely manner with the appropriate clearance between the convex and concave molds. The entire mold of the tilting punch (3). (4) Strengthen the sense of responsibility, and operators should promptly identify the cause to avoid causing greater losses.
2. Hydraulic punching machine wears out too quickly
Main reason: (1) The mold clearance is small, and it is generally recommended that the total mold clearance be 20%~25% of the material thickness. (2) The neutral alignment of the convex and concave molds is not good, including the insufficient positioning accuracy of the mold base and mold components, as well as the insufficient turret. The temperature of the convex mold in the punching machine factory (3) is too high, mainly due to the overheating of the hydraulic punching machine with the same mold for a long time. (4) Improper grinding method of the mold leads to annealing and wear of the mold. Step 5. Local unilateral cutting, such as affecting the angle of attack or shear lateral force, can be pushed to one side, reducing the side clearance and causing severe mold wear. If the installation accuracy of the machine mold is not high, the hydraulic punch will seriously damage a lower mold, punching hydraulic punch, and concave mold.
3. Issues with mold materials
Mold and materials can lead to waste and rebound, and the related factors are: (1) The sharp knife and round edge of the mold, the greater the rebound, the more likely it is to cause waste. (2) The modulus of hydraulic punching machine molds is certain for each station's machine tool modulus, and the modulus of molds is small, which can easily lead to waste recycling. (3) The gap between molds is reasonable, as improper mold gaps can easily lead to waste recycling. (4) Is there more oil on the surface of the processed board. (5) Spring fatigue damage.
Method to prevent mold material: (1) Use a dedicated pickup to die. (2) The mold often maintains sharp grinding and demagnetization. (3) Increase the gap in molds. (4) Hydraulic punching machines are based on spiral blade molds rather than flat blade molds. (5) Mold installation returns to the feeder. 6. Reasonably increase the modulus of the mold. All landlords inspect the fatigue strength of mold springs or discharges.