Commonly used reset structure of side stamping slider
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The reset mechanism of a commonly used lateral stamping slide is a key component for ensuring the continuous and stable operation of the stamping die. Its core function is to precisely return the slide to its initial position after the lateral stamping action is completed, preparing for the next stamping cycle. This type of structure must possess sufficient rigidity, stability, and responsiveness to meet the production demands of high-speed stamping. Depending on the power source, reset mechanisms are mainly divided into spring reset, cylinder reset, hydraulic cylinder reset, and mechanical cam reset types, each with its own unique application scenarios and performance characteristics.
The spring return structure is the most widely used method for resetting lateral sliders. Its principle is to use the storage and release of the elastic potential energy of the spring to achieve the reset action of the slider. During lateral stamping, the slider compresses the spring to store energy. After the stamping is completed, the spring pushes the slider back to its original position under the action of the restoring force. The advantages of this structure are simple structure, low cost, and easy installation and maintenance. It is suitable for occasions with short stamping strokes and small lateral forces, such as the lateral punching process of small electrical parts. However, spring reset has the problem of elastic fatigue. After long-term use, the elastic force of the spring will gradually decay, resulting in a decrease in reset accuracy. Therefore, the spring needs to be replaced regularly to ensure reset reliability. In addition, the selection of the spring must be accurately calculated according to the size of the lateral force. The spring coefficient and compression amount must match the mass and travel of the slider to avoid resetting too quickly or too slowly.
The cylinder reset structure is widely used in medium and large stamping dies due to its stable power output and fast response speed. This structure uses compressed air to drive the cylinder piston, which drives the slider to complete the reset action. The reset force can be precisely controlled by adjusting the air pressure to meet the needs of different stamping conditions. Compared with spring reset, cylinder reset does not have the problem of elastic fatigue, has a longer service life, and has a uniform reset speed, which can effectively reduce the impact and vibration when the slider is reset. In terms of structural design, the cylinder is usually connected to the slider with an articulated connection to adapt to the lateral movement trajectory of the slider. At the same time, it is equipped with a buffer device, such as a throttle valve or a buffer pad, to reduce the impact force when the slider is reset into place. The disadvantage of cylinder reset is that it requires a compressed air system, which increases the initial investment and maintenance costs of the equipment. In addition, unstable air pressure may affect the reset accuracy. Therefore, it is suitable for occasions with high reset performance requirements and large production batches.
Hydraulic cylinder reset mechanisms are suitable for heavy-duty stamping dies requiring high reset forces. They utilize hydraulic oil pressure to drive the hydraulic cylinder, providing a powerful and stable reset force for the slide. This mechanism’s reset force can be infinitely controlled through pressure regulation in the hydraulic system, and the reset stroke is highly accurate, meeting the production requirements of high-precision stamped parts. While the hydraulic cylinder’s reset response is slower than that of a pneumatic cylinder, it offers high output force and strong load-bearing capacity, making it suitable for applications involving high lateral pressure and heavy slide masses, such as the lateral forming of automotive chassis parts. The hydraulic system requires a pressure-maintaining device and a synchronous control mechanism to ensure consistent movement when multiple slides are reset simultaneously, preventing jamming or unbalanced loading. Furthermore, hydraulic cylinder reset mechanisms are costly to manufacture and difficult to maintain, requiring specialized hydraulic expertise. Therefore, the selection process must carefully consider both production requirements and cost-effectiveness.
The mechanical cam reset structure achieves the reset of the slider through mechanical transmission of the cam and roller. Its reset action is strictly synchronized with the main movement of the stamping die, and has extremely high movement accuracy and reliability. This structure is suitable for high-speed stamping production lines and can maintain stable reset performance at a stamping frequency of hundreds of times per minute, such as the continuous stamping of electronic components. The key to the design of mechanical cam reset lies in the optimization of the cam profile curve. A smooth curve must be designed based on the reset stroke and speed requirements of the slider to reduce friction and wear between the cam and roller, thereby extending the service life. In addition, this structure requires high manufacturing precision. The processing errors of the cam and roller will directly affect the reset accuracy, resulting in high manufacturing costs. Once the mechanical cam reset structure is adjusted into place, it does not require frequent maintenance. It is suitable for large-scale, continuous production scenarios and is an ideal choice for the field of high-speed precision stamping.
