Cold stamping die is the main process equipment of stamping, stamping parts are completed by the relative movement of the upper and lower die. Due to the continuous separation and closing between the upper and lower molds, if the operator's fingers constantly enter or stay in the mold closed area, it will pose a serious threat to their personal safety.
（1） Main parts, functions and safety requirements of mould
1. The punch and die of the working part in Guangdong Machinery processing plant are the working parts that directly shape the blank. Therefore, it is the key part of the die. The punch and die are not only precise but also complex
(1) There should be enough strength to prevent fracture or damage during stamping
(2) Proper requirements should be made for the material and heat treatment to prevent brittleness due to high hardness.
2. Positioning parts positioning parts are parts to determine the installation position of the blank, including positioning pin (plate), stop pin (plate), guide pin, guide plate, fixed distance side knife, side press, etc. When designing positioning parts, we should consider the convenience of operation, not over positioning, and the position should be easy to observe. It is better to use forward positioning, contour positioning and guide pin positioning
3. Pressing, discharging and discharging parts. Pressing parts include blank holder, pressing plate, etc.
The blank holder can press the edge force on the blank, so as to prevent the blank from arching and forming wrinkles under the action of tangential pressure. The function of the pressing plate is to prevent the blank from moving and bouncing. The function of ejector and discharge plate is convenient for discharging and cleaning waste. They are supported by spring, rubber and air cushion push rod on the equipment, and can move up and down. The ejector should be designed with enough jacking force and limited movement. The closed area of the discharge plate should be reduced as much as possible or the empty hand groove should be milled in the operation position. The exposed discharge plate shall be provided with a protective plate around to prevent fingers or foreign matters from entering, and the edges and corners of the exposed surface shall be blunt.
4. Guide part guide pillar and guide sleeve are the most widely used guide parts. Its function is to ensure that the punch and die in the stamping work with accurate clearance. Therefore, the gap between the guide post and the guide sleeve should be smaller than the blanking gap. The guide post shall be set in the lower die base, and the upper end face of the guide post shall be at least 5 to 10 mm above the top surface of the upper die plate at the bottom dead point of the stroke. The guide post should be arranged far away from the module and the pressing plate, so that the operator's arm does not need to go over the guide post for feeding and reclaiming.
5. Supporting and clamping parts, which include upper and lower formwork, die handle, fixed plate of punch and die, base plate, limiter, etc<< Guangdong Machinery Factory is worth paying attention to
The upper and lower templates are the basic parts of the cold stamping die, and other parts are installed and fixed on them respectively. The plane size of the formwork, especially the front and back direction, should be suitable for the parts. Too large or too small is not conducive to operation.
Some molds (blanking and punching molds) in Guangdong mechanical processing plant need to be provided with backing plate under the mold base in order to make it convenient to take out parts. At this time, it is better to connect the base plate with the template with screws, and the thickness of the two base plates should be absolutely equal. The spacing of the base plate shall be subject to the output part, not too large, so as to avoid the fracture of the formwork.
6. Fastening parts include screw, nut, spring, pin, washer and so on. Generally, standard parts are used. The amount of standard parts of cold stamping die is large, so it is necessary to ensure the need of fastening and elastic ejection in design and selection, so as to avoid the exposure of fasteners to the surface operation position, and to avoid hurting hands and hindering operation.