Measuring tool and measuring method for intersection position of straight holes and taper holes

Abstract

The invention discloses a measuring tool and a measuring method for an intersection position of straight holes and taper holes. The measuring tool comprises a cone frustum-shaped gauge body, wherein vertical dial gauges are arranged symmetrically on edges of an upper end face of the gauge body; the dial gauges are fixed on the gauge body respectively by supporting plates which extend out horizontally; and height gauge-setting blocks which are placed vertically are arranged below the dial gauges. The measuring method comprises the following steps of: firstly putting a gauge tool on a flat plate in measurement; carrying out return-to-zero on the dial gauges on two sides simultaneously by using the height gauge-setting blocks; measuring an upper taper hole, and reading the data of the dial gauges; measuring a lower taper hole according to a same step; and reading numerical values of the dial gauges by only replacing the height gauge-setting blocks for gauge setting. By the tool and the method, measurement data can be obtained from a processing machine tool, usage is convenient, labour intensity can be reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to a measuring instrument and a measuring method for the intersection position of a straight hole and a tapered hole, and belongs to the technical field of mechanical manufacturing and measuring. Background technique [0002] Such as figure 1 For the parts shown, it is necessary to precisely control the length dimensions L1, L2, L3, diameter dimensions D1, D2, D3, and angle α at the same time during processing. The main difficulties in processing and measurement are as follows: [0003] (1) The length dimensions L1 and L2 that need to be controlled by the workpiece are both the boundary line between the inclined cone surface and the cylindrical surface, and the intersection is an obtuse angle (180°-α). It can be known from the common sense of machining measurement that conventional measuring tools ( Such as depth vernier caliper, etc.) cannot achieve accurate measurement. [0004] (2) Since the dimensions L1 and L2 cannot be dir...

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Problems solved by technology

[0003] (1) The length dimensions L1 and L2 that need to be controlled by the workpiece are both the boundary line between the inclined cone surface and the cylindrical surface, and the intersection is an obtuse angle (180°-α). It can be known from the common sense of machining measurement that conventional measuring tools ( Such as depth vernier caliper, etc.) cannot achieve accurate measurement

[0004] (2) Since the dimensions L1 and L2 cannot be directly controlled, the processing is mainly controlled indirectly by controlling the processing volume of the two sections of tapered surfaces and the middle straight hole, that is, it is necessary to ensure that L1 and L2 reach Finished product requirements, but the size of the taper hole diameter D1 and D3 and the angle of the taper surface α, the measurement of the conventional measuring tool can not meet the accuracy requirements

[0005] (3) Once the part is disassembled from the machine tool and found to be unqualified, the dimensional relationship that needs to be considered during rework is very complicated and very difficult

[0007] 1. Real-time measurement cannot be performed on the processing equipment, and the processing volume cannot be quickly adjusted according to the measurement results, so a lot of downtime is required due to the measurement, the processing efficiency is very low, and the production cycle is greatly extended

[0008] 2. At present, most of the high-precision three-coordinate measuring instruments are imported from abroad. The measuring equipment is very expensive, and the price is often several million yuan, and the measurement cost is very high.

[0009] 3. Once the size is found to be unqualified after three-coordinate measurement, the size relationship that needs to be considered during rework is very complicated. A little carelessness will lead to product scrapping, and the quality cost is too high

And after rework, it is still necessary to use a three-coordinate instrument to measure the rework results, which makes the production enterprise miserable

[0010] 4. Low-level processing efficiency and high quality costs will inevitably make the company's products unable to meet market needs, thus losing the basis for grabbing the market

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