How to solve the common problems and precautions of stamping workpiece?

Stamping workpiece has the advantages of light weight, thin thickness and good rigidity. Its dimensional tolerance is guaranteed by the die and can be used without mechanical cutting. The technology and equipment for stamping workpieces are constantly developing. In addition to the traditional use of press and steel die to manufacture stamping parts, various special stamping processes such as hydroforming, spinning, superplastic forming, explosive forming, electro-hydraulic forming and electromagnetic forming have also developed rapidly, raising the stamping technology level to a new height. The following briefly introduces the solutions to common problems in stamping process:

First, the common problems of stamping workpiece in production:

1, adhesion, scratches: defects on the surface of parts or dies due to friction between materials and punches or dies.

2. Burr: It mainly occurs in the shearing die and the blanking die, and burr will occur when the gap between the cutting edges is large or small.

3. Bending: The corner or embossed part of the part is distorted due to uneven stress, poor matching of drawbead or poor control of the press slider.

4. Convex and concave: The uncoiling line is mixed with foreign objects (iron filings, rubber, dust) to cause convex and concave.

5. Offset: When the part is molded, the part that first contacts with the mold is squeezed to form a line.

6. The stamping size is too large or too small: in the case of large difference from the punch size, the design size, machining accuracy and blanking gap of the forming punch and die should be considered.

Second, the matters needing attention in stamping process design

1, material selection: the selection of materials is very important when making stamping workpiece products. According to the past experience, the selection of stamping workpiece materials should consider the brand, thickness, specification and size. Only by selecting reasonable plates can high-quality stamping parts be manufactured.

2. Precision: The precision of stamping parts can be divided into precision grade and economic grade. Choosing appropriate precision is helpful to cost control.

3. Design: The design of stamping parts must be carried out in strict accordance with the drawings approved according to the prescribed procedures, and conform to the relevant national and industrial standards.

Three. Requirements for manufacturing stamping workpieces

1. Turn off the power supply, and find the technical personnel on duty to deal with the abnormal machine in time.

2. After cleaning and checking the stamping workpiece processing equipment, the power supply must be cut off.

3. The technicians on the die-setting machine can only operate independently by one person.

4. When punching continuously, employees can't hold the product by hand in the punching machine.

5, such as single company in the work is not clear, the operation is ineffective or electrical failure, should immediately stop looking for the technician on duty.

6. Non-electricians are forbidden to connect electricity to maintain the machine.

The above are the common problems and precautions of stamping process, and reasonable arrangement of process is helpful to improve the accuracy of workpiece.