Tolerance inspection caliper rule

Abstract

The invention relates to a tolerance inspection caliper rule which comprises a straight rule. The straight rule is provided with a fixed end, a sliding seat and a fixed sleeve, wherein the fixed end is a straight rule rod body marked with primary scales and vernier scales on the two sides; the sliding seat is sleeved at the fixed end of the primary scales, similar or equal to the slideable structure with a dial of a standard caliper rule; the fixed sleeve is sleeved at the fixed end of the vernier scales; the fixed sleeve is provided with a size positioning block; one end of the size positioning block is overlapped with the zero scale on the straight rule; two vernier blocks capable of sliding along the length direction of the straight rule and marked with vernier scales are arranged on the inner wall of the fixed sleeve; the two vernier blocks are symmetrical with each other and partially extend out of the fixed sleeve, and racks are arranged on the opposite sides respectively; the straight rule is provided with a regulator for driving the racks to symmetrically move toward opposite directions; and the end surface of the sliding seat and the end surfaces of the two vernier blocks form a flat detection jaw. The tolerance inspection caliper rule provided by the invention realizes simple and convenient tolerance inspection and has high detection efficiency.

Description

technical field [0001] The invention relates to a dimension measuring and inspection tool, in particular to a tolerance inspection caliper. Background technique [0002] A tolerance is the allowable variation in the value of an actual parameter. For production, processing and manufacturing, the actual size of the product with limited tolerances can be changed within a certain range in order to meet the requirements of sharing, interchange or mutual cooperation. During the manufacturing process of products, processing errors will inevitably occur. The actual manufacturing size of batch products or parts cannot accurately reach a specified value. Usually, the actual size of the product is required to have sufficient accuracy, that is, the actual size of the product The deviation from the theoretical size is controlled within a certain range. Within the allowable range, the product is judged to be qualified, and the allowable range is the tolerance, such as dimension A ,...

AI Technical Summary

Problems solved by technology

This measurement method requires two rulers, and the tolerance size needs to be adjusted separately, and the measurement is performed in rotation. There are disadvantages such as troublesome size adjustment, cumbersome measurement steps, and low efficiency, which is not conducive to the rapid detection of workpieces; another method is to make special Tolerance testing jig, one end is the upper tolerance size, and the other end is the lower tolerance size. This jig has the advantages of convenient detection and high efficiency, but the disadvantage is also very obvious, that is, it can only measure a certain tolerance of a single size, and it is not universal at all. The reliability is notable, and the production cost is high. A product often has many dimensions that need to be controlled, and many special fixtures are used. The detection cost will be very high, which will directly affect the vitality of the product.

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