CN109540429B - Thin-wall long pull rod large-torque test process method and tool - Google Patents

Thin-wall long pull rod large-torque test process method and tool Download PDF

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Publication number
CN109540429B
CN109540429B CN201811315699.5A CN201811315699A CN109540429B CN 109540429 B CN109540429 B CN 109540429B CN 201811315699 A CN201811315699 A CN 201811315699A CN 109540429 B CN109540429 B CN 109540429B
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China
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pull rod
thin
connecting piece
multiplier
rotation plate
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CN109540429A (en
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马红梅
汤栋杰
胡开菊
王泽霞
徐勇
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Aecc Chengdu Engine Co ltd
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Aecc Chengdu Engine Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts

Abstract

The invention relates to a thin-wall long pull rod large-torque test process method and a tool. The tool comprises a bottom plate, a support plate, at least two first stand columns, at least two second stand columns, an inner rod, a first anti-rotation plate, a second anti-rotation plate, a multiplier, a first connecting piece and a second connecting piece, wherein the inner rod is arranged corresponding to the first stand columns; the bottoms of the two first upright columns and the two second upright columns are arranged on the bottom plate, and a connecting line of the positions of the two first upright columns is intersected with a connecting line of the positions of the two second support columns; the bottom plate is provided with a supporting block protruding upwards. The invention provides a tool, which is characterized in that the threaded connection part of a pull rod is clamped into a hexagonal hole, a multiplier is used, the position and the mode of applying torque are reasonably determined, and the problem that the pull rod is deformed or even damaged in the torque applying process due to insufficient rigidity of the threaded connection part of the pull rod in the torque applying process is solved.

Description

Thin-wall long pull rod large-torque test process method and tool
Technical Field
The invention relates to the field of aviation, in particular to a thin-wall long pull rod large-torque test process method and a thin-wall long pull rod large-torque test tool.
Background
As shown in figure 1, the special-shaped thin-wall long draw bar is a component of an aircraft engine of a Yangtze river 1000, the middle of the draw bar is a bar body, and two ends of the draw bar are sequentially provided with connectors with asymmetric threads and U-shaped opening structures. The draw bar has a large length-diameter ratio, the thinnest part is only 3mm, the required assembly moment in the assembly process is 6000 N.m at most, and the draw bar is a domestic first structure adopting the large torque for assembly.
Because the threaded connection part of the pull rod is a polished rod, if a force-limiting wrench is directly used for applying a large tightening torque, on one hand, parts are easy to be damaged in the force application process, on the other hand, the torque which can be directly applied to 6000 N.m is extremely difficult, and a special tool is required to complete the torque test. The tool in the prior art cannot be reliably connected with a smooth outer circle, relative sliding is easily generated between a part and the tool in the force application process, and the effectiveness of torque cannot be guaranteed.
Disclosure of Invention
The invention provides a thin-wall long pull rod large-torque test tool which comprises a bottom plate, a support plate, at least two first stand columns, at least two second stand columns, an inner rod, a first anti-rotation plate, a second anti-rotation plate, a multiplier, a first connecting piece and a second connecting piece, wherein the inner rod is arranged corresponding to the first stand columns; the bottoms of the first upright columns and the second upright columns are arranged on the bottom plate; the bottom plate is provided with a supporting block protruding upwards;
an inner rod is arranged in the first upright post, the inner rod is movably fixed in the first upright post and can extend into or out of the first upright post, and a first anti-rotation plate is fixed at the top end of the inner rod; a second anti-rotation plate is fixed at the top end of the second upright post, and the projection of the first anti-rotation plate on the horizontal plane is not parallel to the projection of the second anti-rotation plate on the horizontal plane; the first anti-rotation plate is arranged above the second anti-rotation plate, the multiplier is fixed on the first anti-rotation plate, and a working hole of the multiplier faces the second anti-rotation plate; the support plate is fixed below the second anti-rotation plate, and the first upright post and the second upright post penetrate through the support plate; holes are arranged in the middle of the second anti-rotation plate and the support plate.
Furthermore, the first connecting piece is cylindrical, and splines are arranged on the edge of the head of the first connecting piece and can be matched and connected with the splines in the multiplier; the center of the bottom is provided with a hexagonal groove, and the edge is in a sawtooth shape; the second adapter is cylindrical, the edge of the head is in a sawtooth shape and can be matched with the sawtooth of the first adapter, and a hexagonal hole is formed in the center of the bottom of the second adapter.
Furthermore, the second anti-rotation plate, the hole in the middle of the support plate, the hexagonal grooves of the first connecting piece and the second connecting piece are coaxial.
Furthermore, the threaded connection part of the special-shaped thin-wall long pull rod can be tangent to the hexagonal grooves of the first connecting piece and the second connecting piece.
Further, the first upright post and/or the second upright post are respectively provided with two upright posts.
A thin-wall long pull rod large torque test process method comprises the following steps:
the method comprises the following steps: adjusting the height of the inner rod according to the height of the thin-wall long pull rod to be processed;
step two: and (3) extending the thin-wall long pull rod to be processed into the holes in the centers of the second anti-rotation plate and the support plate, and placing the tail end of the thin-wall long pull rod on the support block.
Step three: adjusting the height of the inner rod to enable the first connecting piece to be meshed with the spline of the multiplier, the second connecting piece to be meshed with the sawtooth of the first connecting piece, and the top end of the pull rod to extend into a working hole of the multiplier from hexagonal holes of the first connecting piece and the second connecting piece; the height of the multiplier is fixed, and the threaded connection part of the pull rod is clamped into the hexagonal hole.
Step four: applying a torque to the multiplier; and the torque is transmitted to the threaded connection part of the pull rod through the multiplier, the first connecting piece and the second connecting piece in sequence, so that the thin-wall long pull rod is processed.
The invention has the beneficial effects that:
the invention provides a tool, which is characterized in that the threaded connection part of a pull rod is clamped into a hexagonal hole, a multiplier is used, the position and the mode of applying torque are reasonably determined, and the problem that the pull rod is deformed or even damaged in the torque applying process due to insufficient rigidity of the threaded connection part of the pull rod in the torque applying process is solved.
Drawings
Fig. 1 is an appearance schematic diagram of a thin-wall long pull rod.
Fig. 2 is a cross-sectional view of the present invention.
Wherein: 1. the novel anti-rotation device comprises a multiplier, a base plate 2, a screw 3, a first upright post 4, a support seat 5, a second upright post 6, a support plate 7, a second anti-rotation plate 8, a nut 9, a first anti-rotation plate 10, a second connecting piece 11 and a first connecting piece 12.
Detailed Description
The invention is described in further detail below with reference to fig. 2 and the specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
The design concept of the invention is as follows: the problem is solved by fixing the pull rod by a hexagonal process table. Therefore, the reliable connection between the parts and the tool can be realized, the effective transmission of the tightening torque can be realized, and the reliability of the torque test is enhanced.
The special-shaped thin-wall long-pull-rod large-torque test tool comprises a bottom plate 2, a support plate 7, at least two first stand columns 4, at least two second stand columns 6, a first anti-rotation plate 10, a second anti-rotation plate 8, a multiplier 1, a first connecting piece 12 and a second connecting piece 11. The following are described separately.
The bottom plate 2 is used for providing supporting force for the whole tool and is fixed on the ground or a workbench through screws 3. On which a support seat 5 projecting upwards is provided. The shape of the bottom plate 2 can be set arbitrarily, and a plurality of mounting holes of the first upright posts 4 and a plurality of mounting holes of the second upright posts 6 are arranged on the bottom plate.
Each first upright 4 and each second upright are fixed to the base plate 2, the first upright 4 being longer than the second upright 6. When two first upright columns 4 and two second upright columns 6 are arranged, the two first upright columns 4 are oppositely arranged, the two second upright columns 6 are oppositely arranged, and a connecting line of the positions of the two first upright columns 4 is intersected with a connecting line of the positions of the two second upright columns.
A first anti-rotation plate 10 is fixed at the top end of the inner rod, the first anti-rotation plate 10 being used to mount the multiplier 1 (the existing multiplier 1 can be used). The working aperture of the multiplier 1 is facing downwards. An inner rod is arranged in the first upright post 4, is movably fixed in the first upright post 4 and can extend out of or extend into the upright post of the first upright post 4, so that the height of the multiplier 1 is adjusted.
The top end of the second upright post 6 is fixed with a second anti-rotation plate 8 which is fastened by a nut 9 and a screw. The projection of the first anti-rotation plate 10 on the horizontal plane is not parallel to the projection of the second anti-rotation plate 8 on the horizontal plane, which is to increase the overall stability. The first anti-rotation plate 10 is above the second anti-rotation plate 8. The second anti-rotation plate 8 is provided with a hole in the center for the pull rod to be processed to pass through.
The support plate 7 is arranged below the second anti-rotation plate 8, and a hole is formed in the center. Each first upright 4 and each second upright 6 pass through the support plate 7, and the support plate 7 is used for tensioning each upright, so that the whole structure is more stable. The centrally disposed hole is used to pass a tie rod to be machined.
The first connecting piece 12 is cylindrical, and the head part of the first connecting piece is provided with a spline and can be matched and connected with the spline in the multiplier 1. The bottom center position is provided with a hexagonal groove with a saw-tooth shape and is connected with a second adapter with the same structure.
The second connector 11 is cylindrical, the head of the second connector is saw-toothed, the second connector can be tightly matched with the saw teeth of the first connector 12, and a hexagonal hole is formed in the center of the bottom of the second connector and matched with the pull rod process table and used for transmitting torque applied by the multiplier 1.
The test process method comprises the following steps:
the method comprises the following steps: and adjusting the height of the inner rod according to the height of the pull rod to be processed.
Step two: and (3) extending the pull rod to be processed into holes in the centers of the second anti-rotation plate 8 and the support plate 7, and placing the tail end of the pull rod on the support seat 5.
Step three: the height of the inner rod is adjusted, so that splines of the first connecting piece 12 are meshed with splines in a working hole of the multiplier 1, sawteeth are meshed with sawteeth of the second multiplier 1, the top end of the pull rod extends into the working hole of the multiplier 1 from hexagonal holes of the first connecting piece 12 and the second connecting piece 11, the height of the multiplier 1 is fixed, and the hexagonal holes are clamped at the threaded connection part of the pull rod, so that the tool is reliably connected.
Step four: applying a torque to the multiplier 1; the moment is transmitted to the process table of the pull rod through the first joint piece 12 and the second joint piece 11 for assembly.
The first-stage magnification of the multiplier 1 is 11 times, the second-stage magnification is 6.5 times, and the pretightening force applied to the working part and the final applied torque are 83.92 N.m.
MPretightening force＝MTarget momentMagnification factor
Is not only MPretightening force＝2250/11/6.5＝31.47N·m。
MFinal moment＝MTarget momentMagnification factor
Is not only MFinal moment＝6000/11/6.5＝83.92N·m。

Claims (5)

1. A thin-wall long-pull-rod large-torque test tool is characterized by comprising a bottom plate, a support plate, at least two first stand columns, at least two second stand columns, inner rods, first anti-rotation plates, second anti-rotation plates, multipliers, first connecting pieces and second connecting pieces, wherein the inner rods are arranged in one-to-one correspondence to the first stand columns; the bottoms of the first upright columns and the second upright columns are arranged on the bottom plate; the bottom plate is provided with a supporting block protruding upwards;
an inner rod is arranged in the first upright post, the inner rod is movably fixed in the corresponding first upright post and can extend into or out of the first upright post, and a first anti-rotation plate is fixed at the top end of the inner rod; a second anti-rotation plate is fixed at the top end of the second upright post, and the projection of the first anti-rotation plate on the horizontal plane is not parallel to the projection of the second anti-rotation plate on the horizontal plane; the first anti-rotation plate is arranged above the second anti-rotation plate, the multiplier is fixed on the first anti-rotation plate, and a working hole of the multiplier faces the second anti-rotation plate; the support plate is fixed below the second anti-rotation plate, and the first upright post and the second upright post penetrate through the support plate; holes are formed in the middle of the second anti-rotation plate and the support plate;
the first connecting piece is cylindrical, and the head part of the first connecting piece is provided with a spline and can be matched and connected with the spline in the multiplier; the center of the bottom is provided with a hexagonal groove, and the edge is in a sawtooth shape; the second connecting piece is cylindrical, the edge of the head is in a sawtooth shape and can be matched with the sawtooth of the first connecting piece, and a hexagonal hole is formed in the center of the bottom.
2. The thin-walled long-tension-rod high-torque test fixture of claim 1, wherein the center of the hole in the middle of the second anti-rotation plate, the center of the hole in the middle of the support plate, the center of the hexagonal slot of the first link member and the center of the hexagonal hole of the second link member are collinear.
3. The tool for testing the large torque of the thin-wall long pull rod according to any one of claims 1 or 2, wherein the threaded connection of the thin-wall long pull rod can be tangent to the edges of the hexagonal grooves of the first connecting piece and the second connecting piece.
4. The tool for testing the large torque of the thin-wall long pull rod according to claim 1, wherein the number of the first upright column and/or the second upright column is two.
5. A thin-wall long pull rod large torque test process method is characterized in that the tool according to any one of claims 1 to 4 is used, and comprises the following steps:
the method comprises the following steps: adjusting the height of the inner rod according to the height of the thin-wall long pull rod to be processed;
step two: the thin-wall long pull rod to be processed extends into the holes in the centers of the second anti-rotation plate and the support plate, and the tail end of the thin-wall long pull rod is placed on the support block;
step three: adjusting the height of the inner rod to ensure that the first connecting piece is meshed with a spline of the multiplier, the second connecting piece is meshed with a sawtooth of the first connecting piece, and the top end of the thin-wall long pull rod extends into a working hole of the multiplier from hexagonal holes of the first connecting piece and the second connecting piece; the height of the multiplier is fixed, and the threaded connection position of the thin-wall long pull rod is clamped into the hexagonal hole;
step four: applying a torque to the multiplier; and the torque is transmitted to the threaded connection part of the thin-wall long pull rod through the multiplier, the first connecting piece and the second connecting piece in sequence, so that the thin-wall long pull rod is processed.
CN201811315699.5A 2018-11-07 2018-11-07 Thin-wall long pull rod large-torque test process method and tool Active CN109540429B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811315699.5A CN109540429B (en) 2018-11-07 2018-11-07 Thin-wall long pull rod large-torque test process method and tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811315699.5A CN109540429B (en) 2018-11-07 2018-11-07 Thin-wall long pull rod large-torque test process method and tool

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CN109540429A CN109540429A (en) 2019-03-29
CN109540429B true CN109540429B (en) 2020-06-16

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