CN115014609A - Test platform for axle residual stress detection and using method - Google Patents

Abstract

The invention discloses a test platform for detecting residual stress of an axle. The test platform consists of two tool trolleys with the same structure; the tooling trolley has the following structure: the polytetrafluoroethylene plate and the magnetic conduction plate are both of a V-shaped structure, and the polytetrafluoroethylene plate is superposed above the magnetic conduction plate; the magnetic base is positioned below the magnetic conduction plate; the magnetic base has two states of locking and rotating. The invention also discloses a using method of the test platform. By using the platform, the axle to be tested can freely and conveniently realize the conversion between the locking state and the rotatable state, thereby realizing the multipoint residual stress rapid detection. The test platform for detecting the residual stress of the axle has the characteristics of simple structure, small occupied area, convenience in use, low manufacturing cost and the like.

Description

Test platform for axle residual stress detection and using method

technical field

The present invention relates to a device for detecting mechanical properties of objects, and more particularly, to a test platform for detecting residual stress of an axle and a method of using the same.

Background technique

As we all know, residual stress is an important cause of workpiece deformation, fracture and fatigue life. In order to ensure the qualification rate and precision of workpiece production, residual stress detection is essential. The residual stress detection methods mainly include blind hole method, magnetic measurement method and X-ray method.

At present, in the field of residual stress detection, there is no economical and efficient platform for axle residual stress detection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a test platform for axle residual stress detection. the test platform.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

A test platform for axle residual stress detection is composed of two tooling trolleys with the same structure; the tooling trolleys have the following structures:

The PTFE plate and the magnetic conductive plate are both V-shaped structures, and the PTFE plate is superimposed on the top of the magnetic conductive plate;

The magnetic base is located below the magnetic conducting plate; the magnetic base has two states of locking and rotatable.

When in use, the axle to be tested is used as the sample to be tested, and is placed above the aforementioned PTFE plate.

Further, the PTFE sheet has multiple thicknesses and can be replaced.

Further, the tooling trolley is also provided with a steel plate with holes, the upper part of the steel plate is grooved, and the middle of the steel plate is holed; the steel plate with holes is connected with the PTFE plate through connecting bolts and connecting nuts .

Further, the tooling trolley is equipped with several lockable wheels.

Further, a plurality of reinforcing ribs are welded on the tooling trolley.

The functions of each component are as follows:

(1) Axle to be tested (locked state): The sample of the axle to be tested is in a locked state and cannot freely rotate and move axially.

(2) Magnetic plate: V-shaped structure, which conducts the magnetic force generated by the magnetic base, so that the axle can be switched between locked and rotated states.

(3) Magnetic base: The magnetic force is generated by the knob, and the magnetic force is transmitted to the axle through the magnetic guide plate. The magnetic base has two states: locked and rotatable. The axle to be tested can be locked or rotatable by operating the knob of the magnetic base.

(4) PTFE plate: V-shaped structure, smooth surface, placed above the magnetic conductive plate, so that the axle can be rotated to the position to be measured. The PTFE sheet can be made into different thicknesses, and the PTFE sheets of different thicknesses can be freely matched on the two trolleys to realize the horizontal placement of the axles.

(5) Steel plate with holes: the upper part of the steel plate is narrow and the lower part is wider to improve the overall stability of the structure. Four holes are opened in the middle to reduce the dead weight and facilitate the movement and disassembly of the platform. Block steel frame.

(6) Lockable wheels: Each tooling trolley has several (usually four) lockable wheels to realize the functions of moving and fixing the experimental platform.

(7) Reinforcing ribs: There are several reinforcing ribs welded on each tooling trolley, usually three reinforcing ribs. The reinforcing ribs form a three-dimensional structure to improve the stability of the test platform.

(8) Connection nut: realize the connection between the steel plate with holes and the PTFE plate.

(9) Connecting bolts: realize the connection between the steel plate with holes and the PTFE plate.

(10) Axle to be tested (rotatable state): The sample of the axle to be tested is in a rotatable state and can be rotated freely.

The present invention also proposes a method for using the aforementioned test platform, comprising the following steps:

Step 1, install the PTFE plate on the two tooling trolleys, and push the two tooling trolleys to move to a suitable position;

Step 2. Use a forklift to lift the axle, adjust the position of the trolley properly, place the journals at both ends of the axle on the PTFE plates of the two trolleys, and lock the lockable wheels of the tooling trolley;

Step 3, use the horizontal test block to observe whether the axle is level, if not, replace the PTFE plate with different thickness;

Step 4, rotate the axle to a suitable test position;

When rotating, there is relatively small sliding friction between the axle and the PTFE plate;

Step 5. After the axle is rotated to the proper position, rotate the knob of the magnetic base to lock the axle. At this time, the magnetic base is in the locked state:

Step 6, use the blind hole method to detect the residual stress of the axle test point;

Step 7: After the test is completed, rotate the knob of the magnetic base, repeat steps 4 and 5, and perform the residual stress detection at the next point. When the axle rotates, the magnetic base is in a rotatable state.

Beneficial effects of the present invention:

(1) The axle to be tested can freely and conveniently realize the conversion between the locked state and the rotatable state, so as to realize the rapid detection of residual stress at multiple points;

(2) It has the characteristics of simple structure, small footprint, convenient use and low cost;

(3) The axle can be detected at a suitable height;

(4) The groove of the PTFE plate and the tooling trolley with adjustable spacing can realize the detection of axles of different sizes and have a wide range of applications;

(5) The PTFE plate and other components can be removed and replaced after deformation or wear, and the test platform can be effectively used for a long time.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a partial view of FIG. 1 , which is a partial structural schematic diagram when the axle to be tested is in a locked state.

FIG. 3 is another partial view of FIG. 1 , which is a partial structural schematic diagram when the axle to be tested is in a rotatable state.

Description of reference numerals: 1. Axle to be tested (locked state); 2. Magnetic guide plate; 3. Magnetic base; 4. PTFE plate; 5. Steel plate with holes; 6. Lockable wheel; 7. Reinforcing rib ; 8. Connecting nut; 9. Connecting bolt; 10. Axle to be tested (rotatable state).

Detailed ways

Example 1: Test Platform

In FIG. 1 , the left half is a front view of the structure of the present invention, and the right half is a side view of the structure of the present invention. As shown in Figures 1 to 3, the test platform for axle residual stress detection of the present invention consists of two trolleys with the same structure; the trolleys have the following structures:

The polytetrafluoroethylene plate 4 and the magnetic conductive plate 2 are both V-shaped structures, and the polytetrafluoroethylene plate 4 is superimposed above the magnetic conductive plate 2;

The magnetic base 3 is located below the magnetic conducting plate 2;

The magnetic base 3 has two states: locked and rotatable.

In use, the axle 1 to be tested is used as the sample to be tested, and is placed above the aforementioned PTFE plate 4 .

The PTFE sheet 4 has multiple thicknesses and is replaceable.

The tooling trolley is also provided with a steel plate 5 with holes, the upper part of the steel plate 5 is grooved, and four holes are opened in the middle of the steel plate; The vinyl fluoride plate 4 is connected.

The tooling trolley is equipped with four lockable wheels 6 .

Three reinforcing ribs 7 are welded on the tooling trolley.

Example 2: How to use

The operation steps of using the test platform for axle residual stress detection described in Example 1 are as follows:

Step 1, install the polytetrafluoroethylene plate 4 on the two tooling trolleys, and push the two tooling trolleys to move to a suitable position;

Step 2, use a forklift to lift the axle 1, adjust the position of the trolley appropriately, place the journals at both ends of the axle 1 on the PTFE plates 4 of the two trolleys, and then lock the lockable wheels 6 of the tooling trolley;

Step 3, use a horizontal test block to observe whether the axle 1 is level, if not, replace the PTFE plate 4 with different thicknesses;

Step 4: Rotate the axle 1 to a suitable test position; during rotation, there is a relatively small sliding friction force between the axle 1 and the PTFE plate 4;

Step 5: After the axle 1 is rotated to a suitable position, rotate the knob of the magnetic base 3 to lock the axle 1. At this time, the magnetic base 3 is in the locked state as shown in Figure 2:

Step 6, use the blind hole method to detect the residual stress of the axle test point;

Step 7: After the test is completed, rotate the knob of the magnetic base 3, repeat steps 4 and 5, and perform the residual stress detection at the next point. When the axle 10 rotates, the magnetic base is in a rotatable state as shown in Figure 3.

The test platform for axle residual stress detection and its use method involved in the present invention have been described in detail above. In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above examples are only for help. Understand the solution of the present invention and its core idea. It should be noted that the present invention is not limited to the above-described exemplary embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope or spirit of the present invention. Meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope; therefore, in summary, the contents of this specification should not be construed as limiting the present invention.

Claims (6)

1. A test platform for axle residual stress detection is characterized in that, it is composed of two tooling trolleys with the same structure; Described tooling trolley has the following structure: The PTFE plate and the magnetic conductive plate are both V-shaped structures, and the PTFE plate is superimposed on the top of the magnetic conductive plate; The magnetic base is located below the magnetic conducting plate; the magnetic base has two states of locking and rotatable. 2 . The test platform for axle residual stress detection according to claim 1 , wherein the polytetrafluoroethylene plate has multiple thicknesses and can be replaced. 3 . 3. The test platform for axle residual stress detection according to claim 1, wherein the trolley is further provided with a steel plate with holes, the upper part of the steel plate is grooved, and the middle of the steel plate is holed; The perforated steel plate is connected with the PTFE plate through connecting bolts and connecting nuts. 4 . The test platform for detecting residual stress of an axle according to claim 1 , wherein the trolley is equipped with several lockable wheels. 5 . 5 . The test platform for detecting residual stress of an axle according to claim 1 , wherein a plurality of reinforcing ribs are welded on the trolley. 6 . 6. the using method of the test platform described in any one of claim 1 to 5, is characterized in that, comprises the following steps: Step 1, install the PTFE plate on the two tooling trolleys, and push the two tooling trolleys to move to a suitable position; Step 2. Use a forklift to lift the axle, adjust the position of the trolley properly, place the journals at both ends of the axle on the PTFE plates of the two trolleys, and lock the lockable wheels of the tooling trolley; Step 3, use the horizontal test block to observe whether the axle is level, if not, replace the PTFE plate with different thickness; Step 4, rotate the axle to a suitable test position; Step 5: After the axle is rotated to a suitable position, rotate the knob of the magnetic base to lock the axle, and the magnetic base is in a locked state at this time; Step 6, use the blind hole method to detect the residual stress of the axle test point; Step 7: After the test is completed, rotate the knob of the magnetic base, repeat steps 4 and 5, and perform the residual stress detection at the next point. When the axle rotates, the magnetic base is in a rotatable state.

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