Cold forming skills of metal shrapnel

The use of hardware shrapnel skills is now developing. Now, the processing equipment and production lines of mechanical hardware shrapnel are developing towards the depth and breadth of numerical control (NC) and computer control (CNC). However, with the changes in hardware shrapnel materials and new geometric shapes, processing skills have also been developed.　　1) The outer diameter, pitch, and wire diameter (three-variable) suspension hardware shrapnel of the variable hardware shrapnel has been processed without moulding. Since the development of Sanbian hardware shrapnel, tapered steel bars have always been used for winding processing on CNC lathes, but the yield and quotation are not ideal. Now it is changed to go through the spring coiling machine under the heating state to control the roll speed and drawing force to obtain the required cone shape, and use the processing waste heat for quenching.　　2) The hollow Ansuan hardware shrapnel rod is made of low-carbon boron steel plate, rolled and welded.　　3) The torsion bar is made of high-purity 45 steel, which is subjected to high-frequency quenching to obtain the appearance of high hardness and large residual contraction stress, and then improve the fatigue life and anti-loosening ability.　　4) The metal shrapnel widely used in electronic products is basically formed by stamping and active bending. Now the first thing is to develop the joining skills of composite materials.　　A. Cold forming skills of metal shrapnel　　1) Cold forming skills can be automated at one time. The cold forming machine has now expanded to 12 jaws. The steel wire in the size of (0.3-14)mm can basically be formed at one time by the 8-jaw forming machine. The current development direction of forming technology equipment: ①Increase the forming speed, the primary development trend is to increase the forming speed of the equipment, that is, the output power; ②The durability of the equipment is improved by improving the precision of equipment parts and strengthening the heat treatment effect; ③Adding length sensors and The laser rangefinder is used for the active closed-loop operation of the CNC forming machine to control the manufacturing process.　　 2) The scale of cold forming skills. Nowadays, the maximum standard of the large wire diameter hardware shrapnel spring coiling machine can reach 20mm, u003d2000MPa, and the winding ratio is 5. The cold forming skills of variable diameter or equal diameter material Minic-Block metal shrapnel and partial pain metal shrapnel still have limitations.　　B. Thermoforming skills of metal shrapnel　　1) Thermoforming skills and speed ability. At present, my country only has CNC 2-axis hot coil spring machine for forming on the (9~25) mm standard, with a maximum speed of 17 pieces per minute. Compared with developed countries, the distance is larger.　　 2) The ability to control large metal shrapnel thermoforming skills. Since there is only a CNC2-axis hot-coiling spring machine, the shape control is less effective in three directions, and the accuracy is poor; and there is no active bar rotation control and adjustment organization, so the level of hot-coiled metal shrapnel forming skills can be low. Therefore, the precision level of the hardware shrapnel is slow and the level of surface oxidation and decarburization is also low.　　The function of Foshan hardware shrapnel　　hardware shrapnel is a widely used elastic part, which has the characteristics of easy deformation and large elasticity. The main functions in real life are as follows. Dongguan Hardware Shrapnel Factory will introduce us below.　　1, flat cushioning and shock absorption 　　Using the deformation of hardware shrapnel to absorb the energy of shock and vibration, such as the cushioning hardware shrapnel on vehicles and forging equipment, and the vibration-absorbing hardware shrapnel in couplings. 2. Control the movement of the organization. Use the elastic force of the metal shrapnel to maintain the contact between the parts to control the movement of the organization, such as the valve metal shrapnel in the internal combustion engine, the brake, clutch, cam organization, the control metal shrapnel in the governor, and the safety valve The safety hardware shrapnel on the board and so on.　　3. Energy storage and output 　　 Use the energy stored when the hardware shrapnel deforms to perform work, such as wall clock hardware shrapnel, gun bolt hardware shrapnel, and hardware shrapnel in the active machine tool holder that automatically returns to the equipment.　　4. The size of the force measurement　　 uses the characteristic that the deformation of the metal shrapnel is linear with the load it accepts to measure the size of the load, such as the dynamometer, the metal shrapnel scale, the metal shrapnel in the engine power indicator, etc.