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Fixture for exhaust pipe axial bolt hole machining and axial bolt hole machining method

An exhaust pipe and axial technology, which is applied in the direction of manufacturing tools, metal processing equipment, metal processing machinery parts, etc., can solve the problems of thread hole position change and affect the connection of components, so as to achieve uniform force, avoid springback, light weight effect

Pending Publication Date: 2019-01-04
CHINA HANGFA CHANGZHOU LANXIANG MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A certain exhaust pipe part is a thin-walled sheet metal part, and it needs to process multiple threaded holes in the axial direction on its end face, and the position accuracy and dimensional accuracy of each threaded hole are required to be high; , the end of the exhaust pipe to be processed in the axial screw hole is called the processing end. Although the inner cavity is filled with wax to strengthen the overall rigidity, the existing fixture is clamped and positioned in the radial direction at the processing end. During the positioning process, the end surface of the processing end will be slightly deformed. The threaded hole processed in this state will rebound after the fixture is removed, causing the position of the threaded hole to change, affecting the relationship with other components. connect

Method used

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  • Fixture for exhaust pipe axial bolt hole machining and axial bolt hole machining method
  • Fixture for exhaust pipe axial bolt hole machining and axial bolt hole machining method
  • Fixture for exhaust pipe axial bolt hole machining and axial bolt hole machining method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1 An exhaust pipe for an engine needs to be machined with evenly distributed axial screw holes on both ends. In order to complete the above processing, a fixture is specially designed; for the convenience of description, the end of the exhaust pipe to be processed is called It is the processing end, and the other end is used for clamping, so it is called the clamping end; Figure 1 to Figure 2 As shown, the fixture for machining the axial screw hole of the exhaust pipe in this embodiment includes a mounting plate 1 and a clamping bolt. The mounting plate 1 is fixedly provided with an annular boss 2, and the outer diameter of the annular boss 2 is the same as that to be processed. The inner diameter of the clamping end of the exhaust pipe is clearance fit, and the height of the annular boss is set to 5mm, so that when the clamping end of the exhaust pipe is inserted into the annular boss 2, the outer wall of the annular boss 2 will The inner wall of the tube is s...

Embodiment 2

[0023] A method for processing an axial threaded hole of an exhaust pipe, comprising the following steps:

[0024] A. Insert the annular boss 2 of the mounting plate 1 into the clamping end of the exhaust pipe, so that the annular boss 2 forms a support for the inner wall of the exhaust pipe; screw each clamping bolt into the corresponding positioning screw hole 12, so that the clamping The polished rod section of the tightening bolt is arranged close to the outer wall of the exhaust pipe, so that the annular boss 2 and the clamping bolt can limit and fix the clamping end of the exhaust pipe.

[0025] B. Mounting holes 11 are set at the four corners of the mounting plate 1, and the mounting plate 1 is fixed on the horizontal slide rail of the processing machine tool through the mounting holes 11 with bolts, so that the axial direction of the exhaust pipe is set horizontally, and axial screw holes need to be processed The processing end of the exhaust pipe is set facing the dri...

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Abstract

The invention relates to a fixture for exhaust pipe axial bolt hole machining and an axial bolt hole machining method. The fixture for exhaust pipe axial bolt hole machining comprises an installationplate and clamping bolts; an annular boss is fixedly arranged on the installation plate, the outer diameter of the annular boss is in clearance fit with the inner diameter of the clamping end of a to-be-machined exhaust pipe so that the inner wall of the exhaust pipe can be supported by the outer wall of the annular boss when the clamping end of the exhaust pipe is sleeved with the annular boss; and the installation plate is provided with a plurality of through positioning bolt holes, the positioning bolt holes are located on the outer side of the annular boss, the distance between each positioning bolt hole and the outer wall of the annular boss is matched with the thickness of the end of the exhaust pipe, and all the clamping bolts penetrate through the positioning bolt holes and are inthreaded fit with the positioning bolt holes so that the exhaust pipe arranged between the clamping bolts and the annular boss can be clamped and positioned.

Description

technical field [0001] The invention relates to the technical field of machining parts of aero-engines, in particular to a fixture for machining an axial screw hole of an exhaust pipe and a method for machining the axial screw hole. Background technique [0002] A certain exhaust pipe part is a thin-walled sheet metal part, and it needs to process multiple threaded holes in the axial direction on its end face, and the position accuracy and dimensional accuracy of each threaded hole are required to be high; , the end of the exhaust pipe to be processed in the axial screw hole is called the processing end. Although the inner cavity is filled with wax to strengthen the overall rigidity, the existing fixture is clamped and positioned in the radial direction at the processing end. During the positioning process, the end surface of the processing end will be slightly deformed. The threaded hole processed in this state will rebound after the fixture is removed, causing the position...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/06
CPCB23Q3/06
Inventor 黄微陈睿
Owner CHINA HANGFA CHANGZHOU LANXIANG MACHINERY CO LTD