CN205156787U - Bolt class geometric tolerances synthesizes and examines utensil - Google Patents

Abstract

The utility model discloses a bolt class geometric tolerances synthesizes and examines utensil examines the utensil and includes test position, percentage table and first reference block, second reference block and the stopper of setting on the test position, wherein: first reference block setting is in the one end of test position, and second reference block and stopper setting be at the other end of test position, and the stopper is fixed to set up the outside at the test position, examine time measuring, with the bolt arrange in synthesize examine the utensil on, ensure that the second reference block outside is from the bolt head circular arc 5 -15mm of department, carrying bolt length 15 -25mm on the first reference block. Compared with the prior art, the utility model has the advantages that: simple structure not only, convenient operation does benefit to quality testing personnel and operating personnel and detects the product at the scene, error in having reduced moreover to measure to the quality of product has been guaranteed.

Description

Bolt class form and position tolerance comprehensive check tool

Technical field

The utility model relates to bolt and the railway spike series products cubing of high-speed railway fastener, subway fastener and common fastener, is specifically related to the measurer detected the form and position tolerance of bolt and railway spike series products.

Background technology

Along with the development of China's high speed, heavy duty, subway railway, on the railway of high speed development, rail fastening plays a part more and more important, and bolt series products occupies larger specific gravity in fastener, bolt failure just means that whole fastener lost efficacy, and this produces major safety risks to train travel.The quality requirements of high-speed railway is high, and construction cost is high, therefore improves the quality of products, reduces high ferro construction cost also one of research direction just having become high ferro.The form and position tolerance of bolt detects one of problem also just becoming our research and development.

Utility model content

The utility model overcomes shortcoming of the prior art, provides a kind of bolt class form and position tolerance comprehensive check tool, solves difficulty when bolt form and position tolerance (position degree, linearity, total run-out) detects large and be not easy to the problem of carrying.

The technical solution of the utility model is: a kind of bolt class form and position tolerance comprehensive check tool, comprise test desk, dial gauge and be arranged on the first reference block, the second reference block and the limited block on test desk, wherein: the first reference block is arranged on one end of test desk, second reference block and limited block are arranged on the other end of test desk, and limited block is fixedly installed on the outermost of test desk.

Compared with prior art, the utility model has the advantages that:

The one that provides the utility model can detect the comprehensive check tool of (position degree, linearity, total run-out) simultaneously, solves difficulty when bolt class form and position tolerance (position degree, linearity, total run-out) detects large and be not easy to the problem of carrying.Facilitate quality inspection personnel and operating personnel at the scene to the detection of product, substantially increase product quality, effectively improve production efficiency, also save a large amount of time and cost.

Comprehensive check tool of the present utility model not only structure is simple, easy to operate, is beneficial to quality inspection personnel and operating personnel detect product at the scene.The utility model effectively utilizes test desk sole-plate and limited block as benchmark, the position of different length to two V-arrangement reference blocks according to bolt adjusts, adjust rear holding screw to fix, then on a point of product, carry out (position degree, linearity, total run-out) with dial gauge to measure, more accurately, effectively can measure the tolerance and size of product like this, ensure that data are true and reliable.This utility model reduces the error in measurement, thus ensure that the quality of product.

Accompanying drawing explanation

The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is the front view of form and position tolerance comprehensive check tool;

Schematic diagram when Fig. 2 is the measurement of product space degree;

Schematic diagram when Fig. 3 is product total run-out measurement;

Schematic diagram when Fig. 4 is product straight line degree measurement;

Fig. 5 is the side view of the first reference block 2;

Fig. 6 is the side view of the second reference block 4;

Fig. 7 is the side view of form and position tolerance comprehensive check tool;

Fig. 8 is the front view of the first reference block 2;

Fig. 9 is the front view of the second reference block 4.

Embodiment

A kind of bolt class form and position tolerance comprehensive check tool, as shown in Figure 1 and Figure 7, comprising: test desk 1, first reference block 2, dial gauge 3, second reference block 4, limited block 5, holding screw 6 etc., wherein:

Arrange the first reference block 2 in one end of test desk 1, be fixedly installed limited block 5 at the other end of test desk, arrange the second reference block 4 in the inner side of limited block 5, described first reference block 2 and the second reference block 4 are fixed on test desk 1 by holding screw 6.

The structure and characteristics of described first reference block 2 and the second reference block 4 is as follows:

First reference block 2 and the second reference block 4 all adopt V-structure, can play the effect of location like this, not easily produce radial-play to the bolt of circle.Two reference blocks all have breach on both sides, middle part, its objective is the own wt in order to alleviate cubing.

As shown in Figure 5 and Figure 8, the V-type face width degree of the first reference block 2, mainly determine according to the pitch of product, because the pitch of present high iron product is larger, if the surface of contact of reference block V-type face and product threaded portion is less than a pitch of product, so detected next size is just inaccurate, easily produces erroneous judgement.Simultaneously because product will rotate, so we are decided to be the width (see Fig. 5 and Fig. 8) of two pitch it in reference block V-type face.

As shown in Fig. 6 and Fig. 9, the V-type face width degree of the second reference block 4, because it is the polished rod position of carrying bolt, V-type face width degree is just not easily too wide, and surface of contact is too wide, to detected next size also with regard to out of true (see Fig. 6 and Fig. 9).

Principle of work of the present utility model is: by a test desk, a limited block, a dial gauge, the form and position tolerance comprehensive check tool (as Fig. 1 and Fig. 7) of two V-arrangement reference block compositions, product is placed on two V-arrangement reference blocks, test desk sole-plate adjusts two V-arrangement reference blocks and fixes, then on a point of product, carries out (position degree, linearity, total run-out) with dial gauge and measure.

During concrete measurement: bolt is placed on comprehensive check tool, by adjusting two positions of reference block on test desk sole-plate, guarantee outside the second reference block 4 from bolt head circular arc place 10mm, carrying bolt length 25mm on first reference block 2, then by fastening first reference block 2 and the second reference block 4 of holding screw 6:

(1), when product space degree is measured, rotating bolt, guarantees that bolt must not move axially, the gauge head of mobile dial gauge, the maximal value recording the difference of head two corresponding flat reading is its position degree (totally 3 differences, get maximal value), as shown in Figure 2;

(2) when product total run-out is measured, rotating bolt, guarantee that bolt must not move axially, the carrying plane being close to bolt head with dial gauge is measured, and the difference recording full-scale reading and least count is its total run-out, as shown in Figure 3;

(3) during product straight line degree measurement, measure on the polished rod from threaded portion 5mm with dial gauge, screws one week, measure the reading maximum difference of pointer 1/2 is its linearity, as shown in Figure 4.

Other bolt series products all can refer to above method and measures.

Claims (5)

1. a bolt class form and position tolerance comprehensive check tool, it is characterized in that: comprise test desk, dial gauge and be arranged on the first reference block, the second reference block and the limited block on test desk, wherein: the first reference block is arranged on one end of test desk, second reference block and limited block are arranged on the other end of test desk, and limited block is fixedly installed on the outermost of test desk.

2. bolt class form and position tolerance comprehensive check tool according to claim 1, is characterized in that: described first reference block and the second reference block are fixed on test desk by holding screw.

3. bolt class form and position tolerance comprehensive check tool according to claim 1, is characterized in that: described first reference block and the second reference block all adopt V-structure.

4. bolt class form and position tolerance comprehensive check tool according to claim 1, is characterized in that: in the middle part of the first reference block and the second reference block, both sides all have breach.

5. bolt class form and position tolerance comprehensive check tool according to claim 1, is characterized in that: the V-type face width degree of described first reference block is the width of two pitch.