Auxiliary testing fixture for detecting geometric parameters of steep-pitch thread

A technology of geometric parameters and large pitch, which is applied in measuring devices, mechanical measuring devices, mechanical diameter measurement, etc., can solve the problems that the middle diameter and large diameter of large pitch threads cannot be measured, and achieve wide use value, high measurement accuracy, The effect of expanding the range of use

Inactive Publication Date: 2014-08-13
SHENYANG TURBO MASCH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the middle diameter and large diameter of large-pitch threads cannot be measured, the purp

Method used

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  • Auxiliary testing fixture for detecting geometric parameters of steep-pitch thread
  • Auxiliary testing fixture for detecting geometric parameters of steep-pitch thread
  • Auxiliary testing fixture for detecting geometric parameters of steep-pitch thread

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] like figure 1 , figure 2 As shown, the auxiliary checking tool of the present invention is similar to a shaft sleeve. One end of the main body 1 of the checking tool is provided with a positioning hole 2 , and the end surface of the other end is a contact surface 4 .

[0020] The positioning hole 2 is a blind hole, and the size of the blind hole is the same as the outer diameter of the micrometer micrometer rod 9 of the outer diameter micrometer; on the main body 1 of the inspection tool above the positioning hole 2 axially, there is a micrometer rod 9 for fastening The threaded hole 3 communicates with the positioning hole 2. In this embodiment, a fastening part 5 is provided between the two ends of the main body 1 of the inspection tool. The fastening part 5 is divided into an upper part 6 and a lower part 7. In order to achieve a better fastenin...

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Abstract

The invention belongs to the field of screw thread measuring, and specifically discloses an auxiliary testing fixture for detecting geometric parameters of a steep-pitch thread. One end of the testing fixture main body of the auxiliary testing fixture is provided with a positioning hole, the end surface of the other end is a contact surface, the micrometer measuring micro rod of an external diameter micrometer is inserted into the positioning hole, the contact surface abuts against a second needle and a third needle during thread measuring by use of a three-needle method, the second needle and the third needle are placed in a neighboring tooth groove at one side of the axial cross section of the detected thread, and a first needle for measuring the thread by use of the three-needle method is placed into a tooth groove at the other side of the axial cross section of the detected thread and abuts against the micrometer gauge button of the external micrometer. The auxiliary testing fixture provided by the invention solves the problem of measuring an intermediate diameter and a large diameter in the geometric parameters of the steep-pitch thread, overcomes one difficulty in length metering testing, and provides reliable measuring data for the product quality of a machinery industry; and the auxiliary testing fixture is used through cooperation with the external micrometer, is provided with quite high measuring precision, and expands the application scope of the external diameter.

Description

technical field [0001] The invention belongs to the field of thread measurement, in particular to an auxiliary inspection tool for detecting geometric parameters of large-pitch threads. Background technique [0002] Threaded connections are widely used in machine building and instrument manufacturing. The basic concept of the thread is that on the cylindrical surface, the continuous protrusions and grooves with the same cross-section formed along the helix are called threads. The helix refers to the trajectory of a point moving along the surface of a cylinder, and the axial displacement of the point is proportional to it; when machining a thread, the tool passes through the axis of the cylinder and moves at a constant speed along the axis. At the same time, the cylinder rotates evenly around its axis, and the tool cuts a thread at this time, the shape of the thread is determined by the shape of the tool. Therefore, it is very important to detect the geometry of the tap use...

Claims

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Application Information

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IPC IPC(8): G01B5/00G01B5/08
Inventor 刘秋云李广田张吉忠
Owner SHENYANG TURBO MASCH CORP
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