In the dynamic realm of acoustoelectric instruments, the demand for precision is paramount, especially when it comes to crafting metal mesh covers. Our recent collaboration with a client in this industry led us to delve into the intricacies of fabricating metal mesh covers through punch press perforation. The specifics involved a disc-shaped metal strip measuring 0.7×191mm, each coiled strip weighing several hundred kilograms. The mesh apertures, with a center-to-center spacing of 2.2±0.01mm, posed a challenge in terms of precision, especially concerning the feeding mechanism of the punch press.

Precision Solutions: Roller Feeding Machine and Punch Press Integration

To meet the client’s stringent requirements, we propose the integration of a precision roller feeding machine alongside a precision punch press. This dynamic duo ensures the meticulous stamping of mesh cover apertures. The key lies in the design of the tooth count and stepping tooth count within the roller feeding machine, enabling precise control over the strip’s stepping length.

Components of the Precision Roller Feeding Machine

The precision roller feeding machine comprises several crucial components:

  1. Eccentric Disc and Pull Rod: These elements, in tandem with the eccentric disc spindle and universal joint, facilitate controlled swinging of the pull rod. The top end, with engaging teeth, triggers the unidirectional device, initiating precise rotations.
  2. Lower and Upper Rollers: Horizontally mounted on the machine body, these rollers rotate synchronously around the wheel axis. The upper roller, equal in diameter to the lower roller, ensures coordinated movement, achieving optimal feeding precision.
  3. Material Guide Device: Positioned strategically, this device guides the material between the upper and lower rollers, ensuring a smooth and controlled advancement towards the punch press.
  4. Unidirectional Device and Reverse Device: Fixed on the lower roller shaft, the unidirectional device, through key synchronization, rotates the lower roller precisely. Meanwhile, the reverse device prevents roller reversal, maintaining accuracy in the strip’s stepping length.
  5. Pull Rod and Punch Press Integration: The pull rod, connected to the punch press spindle, plays a pivotal role in the synchronized operation of the roller feeding machine and the punch press.

Operational Mechanism

In practical terms, with each press punch, the eccentric disc swings the pull rod through a certain angle. As the pull rod reaches the adjustment sleeve’s neutral position, the unidirectional device’s ratchet engages, driving the device to rotate a specific angle (stepping tooth count). This rotational motion synchronizes the upper and lower rollers, propelling the material 2.2mm towards the punch press. The result is a seamless, high-precision feeding process.

Conclusion

The utilization of a precision roller feeding machine alongside a punch press proves to be the ultimate solution for achieving the exacting standards required in the fabrication of metal mesh covers. The meticulous design of the components ensures not only precision but also efficiency in the production process. As technology continues to advance, these integrated solutions pave the way for excellence in acoustoelectric instrument manufacturing.

 

Metal Mesh Cover Fabrication
Metal Mesh Cover Fabrication