Considering the service life of the mold and pushing down the push stroke, the compression ratio of the return spring is usually 30% to 40%, which results in the use of a light-loaded blue (TL series) spring when the type of the return spring is selected.
The outer diameter of the spring is the main technical parameter of the spring specification. The value is usually affected by the size of the mold and the size of the mounting mandrel. The larger the size of the mold, the larger the outer diameter of the spring.
The spring is mounted on the reset rod. To ensure effective installation, the inner diameter of the spring should be larger than the diameter of the reset rod. The diameter of the reset rod is Φ25mm, and the outer diameter of the spring is finally determined to be Φ50mm. At the same time, in order to ensure the smoothness during the movement, four springs are selected and mounted on the reset rod.
The free length of the spring is one of the basic parameters selected for the spring size, and springs of the same outer diameter can have different free lengths. The free length of the spring is affected by the product's push-out stroke, at least greater than the push-out stroke of the push-out mechanism, otherwise the spring cannot work, so the compression of the return spring should be at least the sum of the push-out stroke and the pre-pressure.
In order to ensure the effective use of the spring, the load must be within the limit. It can be checked by the following formula: nF ≥ 1.5F, where: F - single spring compression state load; n - spring root number; F subject - The load on the spring. As the return spring, the load is mainly derived from the dead weight of the retracting plate and the push plate.
Our grounding and short circuit wire serve to make the temporary short circuit or grounding occur when applied to the circuit or equipment without electricity. Our product is able to avoid the invasion of unexpected power as well as the damage to both operators and devices. In the contract, single phase or triple phase should be indicated. Also, the length must be clearly noted.
Our portable short circuit grounding pole is designed with flat clipper jaws. It is suitable for the copper and aluminum row bus-bar as well as the switch cabinet. The length of ground bar needs to be specified in the contract. The available specifications include 1m, 2m, and 3m. In addition, our customers are required to order the short-circuit earth wire and grounding pole (Grounding End Clip) additionally... We also have the others accessories.
Personal Safety Ground Wire,Protable Short Circuit Grounding Pole,Grounding End Clip, Road Safety Belt
NINGBO MARSHINE POWER TECHNOLOGY CO., LTD. , https://www.marshine-power.com