Reasonable control technology of stamping noise

Stamping noise control technology 1. Improved structure in machine tool structure. The transmission system usually selects spur gears. As soon as the punch is started and the gears are meshed, a sound will be emitted. In order to reduce or eliminate this kind of friction sound, you can try to change the zigzag gear or helical gear for transmission. When unloading the punching parts, try to tilt the bed to make it fall automatically, instead of using high-pressure compressed air to blow it off. In terms of mold structure. The punch die in this workshop uses a flat die, which can be replaced with an oblique die. The blade is used to separate the sheet material, which can delay the punching time and reduce the punching noise to a certain extent. In addition, the cutting angle and punching time also have an impact on noise. In order to achieve the best results, the shear angle should be controlled within 8-10. The size of the percentage gap of the die will affect the fracture form of the material, and the force on it will be more affected. When the gap is small, the noise level is lower. 2. Reduce mechanical stamping noise. The transmission mechanism of mechanical punch presses is usually crank-slider type. When installing the bearing, it should be carried out in strict accordance with the prescribed procedures, and the matching clearance should be kept moderate. When moving, the gap is easy to increase, so high-viscosity lubricating oil can be used on the bearing to increase damping and reduce noise. Or stick a damping layer on the stamping of the metal thick plate, and padded an anti-vibration cushion layer on the part where the metal part hits and reinforce it. 3. Arrange the workshops reasonably. Multi-machine linkage automatic line or special stamping production line is often arranged in groups according to tonnage when arranging the workshop, while the general workshop usually chooses the machine group layout. In order to facilitate operation and reduce noise, lathes can be grouped according to tonnage, the number of each group is controlled within 5, and a row of machine positions should be vacated between each group as a buffer zone. It is more suitable for the punching press to occupy an area of u200bu200b16mZ, and the distance between front and rear should be Zm or more, and the distance between left and right should be greater than lm. 4. Install vibration reduction and noise reduction device. The transmission system of the punching machine is enclosed by a cover to prevent the diffusion of punching noise. If the power of the motor is large, it will produce punching noise, which can also be enclosed by a sound insulation cover. In order to achieve better results, sound insulation can be set at the same time inside and outside, with a sound insulation cover for the outside and an absorbing material for the inside. When installing the punch, a shock-absorbing pad should be installed. Sound-absorbing walls, sound-absorbing screens, etc. can also be installed to absorb sound. 5. Wear earplugs. Reducing the contact time has a lot of noise in the workplace and cannot be controlled. Wearing earplugs for workers can reduce or avoid ear and hearing damage; there is also a reduction in contact time. Previous post: Technical innovation of precision stamping die has been greatly improved