Testing pins belong to the testing fixture series products in mechanical standard parts, and are also a type of product with special applications in sales parts. Generally, it can be simply divided into single head detection pins, double head detection pins, and spring detection pins. The obvious difference between these types of detection pins lies in whether they are single head detection or double head detection.

1. The composition and structure of the inspection pin

The basic structure of the inspection pin consists of three parts, namely the guide part, the inspection part, and the handle part. In the process of using the detection pin, in order to ensure that the detection pin can better achieve the detection function and further accurately detect the effect, the detection pin is generally installed with a guide shaft sleeve. The specific method is to connect the appropriately sized guide sleeve and the detection part of the detection pin, which will make the positioning effect of the detection pin more accurate.

2. The specific role of testing sales

As a type of inspection fixture, the main function of the inspection pin is to achieve the detection of the size and specific position of the hole to be inspected. The detection function of the detection pin also depends on the relationship between its own structure and the shape of the hole to be detected. Generally, based on the difference between these two parts, the detection pin can be divided into a non rotating structure and a non rotating structure.

3. Precautions for using inspection pins

1) When using inspection pins to inspect the holes to be inspected, if there is more than one hole in the part with the same diameter and tolerance requirements, the number of inspection pins is not required to be the same as the number of holes to be inspected. Generally, only one inspection pin is needed to complete the inspection task of all the holes to be inspected.

2) If the holes to be tested are batch processed on the surface of the part through a mold, the best testing method is to use a testing pin to test the two holes with the maximum spacing between the head and tail. The middle hole can be ignored, and it is not necessary to complete the testing steps for each hole.

3) During the installation and fixing process of the inspection pin, steel wire rope is generally used as a fixing tool to fix the inspection pin in the appropriate position of the part to be inspected.

4) If there are more than three detection pins required on a part to be tested, in order to better distinguish them, specific numbers need to be marked on the part to correspond to different detection pins.