Testing fixture for detecting bore

Abstract

The invention discloses a testing fixture for detecting a bore. The testing fixture comprises a basic shaft 1, an air pipe 2, a speed-regulating valve 3, wear-resistant alloy strips 4, blow holes 5 and a plug 6. A detection portion is internally axially provided with a cavity for air circulation, the outer periphery of the detection portion is axially provided with multiple grooves, and each groove is internally provided with a wear-resistant alloy strip 4; a handle portion is axially provided with a recess, the air pipe 2 is arranged in the recess, one end of the air pipe 2 is connected with the speed-regulating valve 3, and the other end is connected with an air source; and the front end of the detection portion is provided with a conical boss, the multiple blow holes are arranged on a conical surface forming a certain included angle with an axis, and the blow holes extend towards the inside of the basic shaft to communicate with the cavity. The testing fixture provided by the invention, is simple in structure, facilities installation, realizes automation easily, is small in hole detection resistance, can blow air in the holes to clear impurities in the holes, and can directly replace a wear-resistant strip without changing a main body after the texting fixture is worn.

Description

technical field [0001] The invention relates to the field of testing moulds, in particular to a checking tool for checking whether the inner hole of a product is qualified or not in an automatic assembly line production line of industrial manufacturing. Background technique [0002] In recent years, with the development of product integration and automatic detection technology, it has become more and more important to detect the inner diameter of products in the assembly line. However, there are only the following methods for measuring the holes of common workpiece products: manual use of vernier calipers, plugs Gauges, inner diameter dial indicators, etc., and the workpiece product needs to be placed on the detection platform for measurement, the process is complicated, and the detection effect is not good. For example, the patent document with the publication number CN104457511A discloses a detection device for the inner diameter, including a detection mandrel 13, a pull r...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of product integration and automatic detection technology, it has become more and more important to detect the inner diameter of products in the assembly line. However, there are only the following methods for measuring the holes of common workpiece products: manual use of vernier calipers, plugs Gauges, inner diameter dial indicators, etc., and the workpiece product needs to be placed on the detection platform for measurement, the process is complicated, and the detection effect is not good

For example, the patent document with the publication number CN104457511A discloses a detection device for the inner diameter, including a detection mandrel 13, a pull rod 1 and other components, but when the structure goes deep into the inner hole for detection, the outer circumference of the mandrel is in contact with the inner hole. The mandrel is easy to wear and the detection accuracy is reduced. Moreover, the impurities in the hole also make the mandrel difficult to enter and exit.

Therefore, the existing inspection tools for inner diameter detection mainly have the following problems: 1. The workpiece is too heavy to be transported manually or is inconvenient to transport; 2. There are bad phenomena of workpiece knocking and collision damage during the handling process; 3. The efficiency is low and the production cycle cannot be met; 4. 1. There are hidden dangers of missing inspection due to manual operation; 5. The replacement cost of the inspection tool is too high after wear; 6. The gap is too small to detect the entry hole is not smooth

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