Pressure testing tool

Abstract

The utility model relates to a pressure testing tool. The pressure testing tool comprises a press machine, a pointer type push-pull meter, a shifting fork blade base and a fixing bolt. The pointer type push-pull meter is vertically arranged and is fixedly connected with a pressure head of the press machine; a pressure head of the pointer type push-pull meter faces downwards; a pressure head of the press is used for driving the pointer type push-pull meter to move up and down; a threaded hole is formed in the upper surface of the shifting fork blade base; the shifting fork blade base is fixed on a base of the press machine; the fixing bolt penetrates through the through hole I of the aluminum sheet to be in threaded connection with the threaded hole of the shifting fork blade base so that the shifting fork blade can be fixed to the shifting fork blade base. The pressure testing tool is good in stability when in use, the detected shifting fork blade does not deform, and the use is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of textile device testing technology, and relates to a pressure testing fixture. Background Technology

[0002] Currently, in the chemical fiber industry, the fork blades of the winding machine are an important component of the winding machine. The yarn cake is wound into shape on the spindle by the high-speed rotation of the fork blades.

[0003] The shift fork blade consists of a ceramic guide plate and an aluminum blade. The ceramic guide plate is glued to the aluminum blade. However, after long-term use, the glue at the bonding point between the ceramic guide plate and the aluminum blade fails and detaches, affecting the normal use of the shift fork blade. For example, CN202223095899.9 describes that after long-term use, the oil can cause the glue on the shift fork blade to fail, leading to the detachment of the ceramic guide plate. The detached ceramic guide plate needs to be re-glued onto the aluminum blade: this involves a series of processes including degreasing and cleaning, glue application, and drying in a constant temperature chamber. Finally, the strength of the re-glued aluminum blade and ceramic guide plate needs to be tested under pressure to confirm whether there are any unqualified reactions such as detachment, cracking, or abnormal noise under a certain force. The specific method for calculating the applied force is: based on the shear strength of the glue used and the contact area between the glue and the shift fork blade, the pressure to be applied is calculated using the formula F=PS.

[0004] In existing technologies, using a bench vise to clamp the aluminum sheet, applying pressure to the ceramic guide plate with a handheld pointer-type push-pull force gauge, or directly pressing the test by hand will cause the aluminum sheet of the shift fork to bend and deform.

[0005] Therefore, it is of great significance to study a pressure testing fixture to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problems existing in the prior art and to provide a pressure testing fixture.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A pressure testing fixture is used to test the bonding strength between an aluminum sheet and a ceramic guide plate in a shift fork blade; the aluminum sheet includes a left section aluminum sheet, a middle section aluminum sheet, and a right section aluminum sheet connected in sequence; the middle section aluminum sheet has a through hole I; the left section aluminum sheet and the right section aluminum sheet are respectively used to bond to a ceramic guide plate; the pressure testing fixture includes a press, a pointer-type push-pull gauge, a shift fork blade base, and fixing bolts;

[0009] The press includes the press head and the press base, and the press is existing technology; the pointer push-pull gauge includes the pointer push-pull gauge press head, and the pointer push-pull gauge is existing technology.

[0010] The pointer-type push-pull gauge is placed vertically and is fixedly connected to the pressure head of the press; the pressure head of the pointer-type push-pull gauge faces downward; the pressure head of the press is used to drive the pointer-type push-pull gauge to move up and down.

[0011] The upper surface of the shift fork blade base is provided with a threaded hole; the shift fork blade base is fixed on the base of the press; the fixing bolt passes through the through hole I of the aluminum sheet and is threadedly connected to the threaded hole of the shift fork blade base to fix the shift fork blade on the shift fork blade base.

[0012] When the shift fork blade is fixed on the shift fork blade base, one of the ceramic guide pieces in the shift fork blade is located directly below the pressure head of the pointer-type push-pull gauge. This ceramic guide piece is denoted as ceramic guide piece a. The vertical projection of ceramic guide piece a is located on the outside of the shift fork blade base, and the vertical projection of the left or right aluminum sheet bonded to ceramic guide piece a is located on the shift fork blade base.

[0013] The testing process is as follows: Based on the shear strength of the adhesive used and the contact area between the indenter of the push-pull gauge and the shift fork blade during pressure application, the required pressure is calculated using the formula F=PS. Then, the shift fork blade is fixed to the shift fork blade base, with the ceramic guide piece a suspended in the air. The press head drives the pointer-type push-pull gauge downwards, causing the indenter of the pointer-type push-pull gauge to contact the upper surface of the ceramic guide piece a. The press continues to apply pressure until the pointer of the pointer-type push-pull gauge displays the required pressure. It is then confirmed whether the shift fork blade detaches, cracks, or makes abnormal noises under the applied pressure. Aluminum sheets have low hardness and are easily deformed. Therefore, the aluminum sheet needs to be protected during pressure application to prevent damage to the shift fork blade after the test. This application improves the structure of the shift fork blade base by supporting the left or right section of the aluminum sheet bonded to the ceramic guide piece a. This provides upward support to the aluminum sheet when it deforms downwards under pressure, thus solving the problem of aluminum sheet deformation.

[0014] As a preferred technical solution:

[0015] As described above, in a pressure testing fixture, the vertical projection of the pressure head of the pointer-type push-pull gauge is located outside the base of the press; the vertical projection of the ceramic guide plate a is also located outside the base of the press. This arrangement minimizes the interference of the press base on the testing process.

[0016] As described above, the pressure testing fixture has a limiting device on the upper surface of the shift fork blade base. The limiting device is used to limit the length direction of the shift fork blade and, in conjunction with the fixed position of the ceramic guide plate a, ensures that the ceramic guide plate a is located directly below the pressure head of the pointer-type push-pull gauge.

[0017] As described above, the pressure testing fixture has a limiting device consisting of two rows of fixing pins, with the spacing between the two rows of fixing pins being the width of the middle aluminum sheet. Each row of fixing pins consists of two fixing pins spaced apart. Placing the middle aluminum sheet in front of the two rows of fixing pins can limit the length direction of the shift fork blade, making operation simple.

[0018] As described above, the pressure testing fixture also includes an upper pressure cover; the upper pressure cover has a through hole II; the lower surface of the upper pressure cover has four fixing pin holes; the upper pressure cover is placed on the shift fork blade base through the fixing pin holes and the fixing pins; the fixing bolts pass through the through hole II of the upper pressure cover, the through hole I of the aluminum sheet and the threaded hole of the shift fork blade base in sequence to fix the shift fork blade on the shift fork blade base. The upper pressure cover can make the fixation of the shift fork blade more stable.

[0019] As described above, the pressure testing fixture includes a fork blade base body and a horizontal plate; the horizontal plate is fixedly connected to the fork blade base body, and the upper surface of the horizontal plate is flush with the upper surface of the fork blade base body.

[0020] When the shift fork blade is fixed on the shift fork blade base, the left or right aluminum plate that is bonded to the ceramic guide plate a is placed on a horizontal plate. The aluminum plate is relatively thin, so it needs to be supported to prevent deformation.

[0021] Beneficial effects:

[0022] (1) The pressure testing fixture of this utility model has a uniform force point for each pressure test and good stability when the pointer-type push-pull gauge is applied for pressure test.

[0023] (2) After using the pressure testing fixture of this utility model, the aluminum sheet in the tested shift fork blade does not deform and will not affect its use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the disassembly and assembly of a pressure testing tool according to this utility model;

[0025] Figure 2 This is a partial explosion diagram of the present invention;

[0026] Figure 3 This is a schematic diagram showing the bonding and separation states of the aluminum sheet and ceramic guide plate in the shift fork blade. In the diagram, (a) shows the bonding state and (b) shows the separation state.

[0027] Among them, 1-press machine, 2-pointer type push-pull gauge, 3-shift fork blade base, 4-shift fork blade, 5-upper pressure cover, 6-fixing bolt, 7-aluminum sheet, 8-ceramic guide plate, 9-adhesive. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0029] A pressure testing fixture, such as Figure 3 As shown, the pressure testing fixture is used to test the bonding strength of the aluminum sheet 7 and the ceramic guide plate 8 bonded together by the glue 9 in the shift fork blade; the aluminum sheet 7 includes a left section aluminum sheet, a middle section aluminum sheet and a right section aluminum sheet connected in sequence; the middle section aluminum sheet is provided with a through hole I; the left section aluminum sheet and the right section aluminum sheet are respectively used to bond to a ceramic guide plate 8;

[0030] like Figures 1-2 As shown, the pressure testing fixture includes a press 1, a pointer-type push-pull gauge 2, a shift fork blade base 3, fixing bolts 6, and an upper pressure cover 5;

[0031] The pointer-type push-pull gauge 2 is placed vertically and is fixedly connected to the pressure head of the press machine 1; the pressure head of the pointer-type push-pull gauge 2 faces downward; the vertical projection of the pressure head of the pointer-type push-pull gauge 2 is located outside the base of the press machine 1; the pressure head of the press machine 1 is used to drive the pointer-type push-pull gauge 2 to move up and down.

[0032] The shift fork blade base 3 includes a shift fork blade base body and a horizontal plate; the horizontal plate is fixedly connected to the shift fork blade base body, and the upper surface of the horizontal plate is flush with the upper surface of the shift fork blade base body.

[0033] The upper surface of the shift fork blade base 3 is provided with threaded holes and a limiting device. The limiting device consists of two rows of fixing pins, and the spacing between the two rows of fixing pins is the width of the middle section aluminum sheet. Each row of fixing pins consists of two fixing pins with a spacing between them.

[0034] The shift fork blade base 3 is fixed on the base of the press 1;

[0035] The upper pressure cover 5 is provided with a through hole II; the lower surface of the upper pressure cover 5 is provided with 4 fixing pin holes; the upper pressure cover 5 is placed on the shift fork blade base 3 through the fixing pin holes and the fixing pins; the fixing bolt 6 passes through the through hole II of the upper pressure cover 5 and the through hole I of the aluminum sheet 7 in sequence and is threadedly connected to the threaded hole of the shift fork blade base 3 to fix the shift fork blade 4 on the shift fork blade base 3; wherein, the limiting device is used to limit the length direction of the shift fork blade 4;

[0036] When the shift fork blade 4 is fixed on the shift fork blade base 3, one of the ceramic guide pieces 8 in the shift fork blade 4 is located directly below the pressure head of the pointer-type push-pull gauge 2. This ceramic guide piece 8 is referred to as ceramic guide piece a. The vertical projection of ceramic guide piece a is located on the outside of the shift fork blade base 3. The left or right aluminum sheet bonded to ceramic guide piece a is placed on a horizontal plate.

[0037] The specific testing process is as follows: the shift fork blade 4 is fixed on the shift fork blade base 3, and the ceramic guide plate a is suspended in the air. The pressure head of the press machine 1 drives the pointer-type push-pull gauge 2 to move downward, so that the pressure head of the pointer-type push-pull gauge 2 contacts the upper surface of the ceramic guide plate a. The press machine 1 continues to apply pressure until the pointer of the pointer-type push-pull gauge 2 shows the pressure to be applied. It is confirmed that under the action of this pressure, the shift fork blade 4 has no unqualified reaction such as falling off, cracking, or abnormal noise.

Claims

1. A pressure testing fixture for detecting the bonding strength of an aluminum sheet and a ceramic guide plate in a shift fork blade; the aluminum sheet comprises a left aluminum sheet, a middle aluminum sheet, and a right aluminum sheet connected in sequence; the middle aluminum sheet has a through hole I; the left and right aluminum sheets are respectively used for bonding with a ceramic guide plate; characterized in that, The pressure testing fixture includes a press, a pointer-type push-pull gauge, a shift fork blade base, and fixing bolts; The pointer-type push-pull gauge is placed vertically and is fixedly connected to the pressure head of the press; the pressure head of the pointer-type push-pull gauge faces downward; the pressure head of the press is used to drive the pointer-type push-pull gauge to move up and down. The upper surface of the shift fork blade base is provided with a threaded hole; the shift fork blade base is fixed on the base of the press; the fixing bolt passes through the through hole I of the aluminum sheet and is threadedly connected to the threaded hole of the shift fork blade base to fix the shift fork blade on the shift fork blade base. When the shift fork blade is fixed on the shift fork blade base, one of the ceramic guide pieces in the shift fork blade is located directly below the pressure head of the pointer-type push-pull gauge. This ceramic guide piece is denoted as ceramic guide piece a. The vertical projection of ceramic guide piece a is located on the outside of the shift fork blade base, and the vertical projection of the left or right aluminum sheet bonded to ceramic guide piece a is located on the shift fork blade base.

2. The pressure testing fixture according to claim 1, characterized in that, The vertical projection of the pressure head of the pointer-type push-pull gauge is located on the outside of the base of the press; the vertical projection of the ceramic guide plate a is located on the outside of the base of the press.

3. The pressure testing fixture according to claim 2, characterized in that, The upper surface of the shift fork blade base is provided with a limiting device, which is used to limit the length direction of the shift fork blade.

4. The pressure testing fixture according to claim 3, characterized in that, The limiting device consists of two rows of fixing pins, and the distance between the two rows of fixing pins is the width of the middle aluminum sheet; each row of fixing pins consists of two fixing pins spaced apart.

5. A pressure testing fixture according to claim 4, characterized in that, The pressure testing fixture also includes an upper pressure cover; the upper pressure cover has a through hole II; the lower surface of the upper pressure cover has 4 fixing pin holes; the upper pressure cover is placed on the shift fork blade base through the fixing pin holes and the fixing pins; the fixing bolts pass through the through hole II of the upper pressure cover, the through hole I of the aluminum sheet and the threaded hole of the shift fork blade base in sequence to fix the shift fork blade on the shift fork blade base.

6. The pressure testing fixture according to claim 5, characterized in that, The shift fork blade base includes a shift fork blade base body and a horizontal plate; the horizontal plate is fixedly connected to the shift fork blade base body, and the upper surface of the horizontal plate is flush with the upper surface of the shift fork blade base body. When the shift fork blade is fixed on the shift fork blade base, the left or right aluminum plate that is bonded to the ceramic guide plate a is placed on the horizontal plate.

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