Tool for preventing gasket from following rotation

Abstract

The utility model discloses a gasket following rotation prevention tool which comprises a fixing seat and a supporting pad, the fixing seat is provided with a containing groove matched with the head of a bolt, the supporting pad is detachably connected to the upper end of the fixing seat through a connecting assembly, and the center of the supporting pad is provided with a center hole for the rod portion of the bolt to penetrate through. Two penetrating holes for drill bits to penetrate through are further symmetrically formed in the supporting pad, the penetrating holes are formed in an up-down penetrating mode, two blind holes used for installing positioning pins are further symmetrically formed in the supporting pad, and the distance between the centers of the blind holes and the center of the center hole is equal to the distance between the center of the penetrating holes and the center of the center hole; the device has the advantages that the problem that in the prior art, a gasket is prone to follow-up rotation in the fastener friction coefficient testing process is effectively solved, and the accuracy and reliability of a testing result are ensured.

Description

Technical Field

[0001] The utility model relates to a preprocessing tooling, in particular to an anti-rotating tooling for gaskets. Background Art

[0002] In the fastener manufacturing industry, especially in the field of automotive fasteners, the friction coefficient is an important parameter to measure the connection reliability, which is directly related to the stability and safety of assembly. The precise control of this physical quantity is crucial for preventing premature loosening of the connecting parts or fracture caused by excessive stress. Incorrect friction coefficients may not only lead to economic losses, but more seriously, may endanger the personal safety of users. Therefore, its precise measurement and management are the core concerns in the industry.

[0003] In the testing process, the evaluation of the friction coefficient faces a challenge: how to ensure the consistency and accuracy of the test environment, especially when conducting the friction coefficient test of gasketed fasteners. According to the ISO16047 standard, the testing of tightening torque and axial preload needs to be strictly controlled, which clearly states that the gasket should not rotate, because this will directly affect the validity of the test results. The measurement deviation of the friction coefficient caused by gasket rotation violates the requirements of Clause 6.2 in the standard, thus seriously hindering the evaluation of product quality.

[0004] Currently, the common countermeasure in the industry is to paste coarse sandpaper on the surface of the test support disc to increase the frictional resistance, aiming to prevent the gasket from rotating with the bolt or nut. However, the actual application effect of this method is not ideal, mainly reflected in unstable clamping, poor repeatability, and difficulty in ensuring the consistency of each test condition. This simple solution not only fails to systematically solve the problem, but may also introduce new variables, further obscuring the true reflection of the test data.

[0005] In view of the above challenges, it is particularly urgent to develop a new anti-rotating preprocessing tooling. Content of the Utility Model

[0006] The purpose of the utility model is to provide an anti-rotating tooling for gaskets, which can effectively solve the problem that the gasket is prone to rotate during the friction coefficient test of fasteners in the prior art, and ensure the accuracy and reliability of the test results.

[0007] To achieve the above object, the utility model provides the following technical solutions: An anti-rotating tooling for gaskets, comprising a fixed seat and a supporting pad. A receiving groove adapted to the bolt head is formed on the fixed seat. The supporting pad is detachably connected to the upper end of the fixed seat through a connecting component. A central hole for the rod portion of the bolt to pass through is formed in the center of the supporting pad. Two perforations for the drill bit to pass through are symmetrically arranged on the supporting pad. The perforations are vertically through. Two blind holes for installing positioning pins are symmetrically arranged on the supporting pad. The distance between the centers of the blind holes and the center of the central hole is equal to the distance between the centers of the perforations and the center of the central hole.

[0008] Preferably, the fixed seat comprises a base and a disc integrally formed. The base is fixed to the lower end of the disc, and the base is of a rectangular structure.

[0009] Preferably, the cross-section of the receiving groove is of a hexagonal structure, and the receiving groove is vertically through.

[0010] Preferably, the connecting component comprises two locking bolts. Two through holes are symmetrically formed on the supporting pad. The locking bolts pass through the corresponding through holes and are screwed onto the fixed seat.

[0011] Preferably, a positioning protrusion is further arranged at the lower end of the supporting pad. A groove adapted to the positioning protrusion is formed at the upper end of the fixed seat. The positioning protrusion and the groove cooperate to limit the movement of the supporting pad on the fixed seat.

[0012] Preferably, a positioning hole for cooperating with a friction coefficient sensor is further arranged on the supporting pad.

[0013] Preferably, the centers of the two perforations and the centers of the two blind holes form a centrally symmetric cross structure.

[0014] Compared with the prior art, the advantages of the utility model are as follows: Through ingenious design, this tooling effectively solves the problem of the gasket rotating during the friction coefficient test of the bolt with gasket or nut with gasket, improves the accuracy of the test result, and its advantages are mainly reflected in the following aspects:

[0015] 1. Effectively solve the problem of gasket rotation: Two centrally symmetric holes can be machined on the gasket through this tooling. During the test, positioning pins are used to position the supporting pad and the gasket to ensure that the gasket does not rotate during the test, thus ensuring the accuracy of the friction coefficient test result.

[0016] 2. Simple structure and convenient to use: This tooling has a simple structure, is easy to operate, does not require complex adjustment, can be quickly installed and disassembled, and improves the test efficiency.

[0017] 3. Good universality: The design of this tooling is applicable to pad bolts or pad nuts of different specifications. Only by replacing the fixed seat to make its accommodating groove fit the bolt to be measured can the application range of the tooling be improved.

[0018] 4. Do not change the original surface state of the sample: When the tooling pre-treats the gasket, only the gasket is perforated, which will not affect the original surface state of the sample and ensures the reliability of the test results.

[0019] 5. High accuracy of detection results: By connecting the bolt to be measured with the support pad and then performing the friction coefficient test, the error caused by the gasket rotating with the bolt can be effectively eliminated, thus ensuring the accuracy of the test results.

[0020] In summary, through the structural improvement, this anti-gasket rotation test tooling effectively solves the problem of gasket rotation, improves the test efficiency and accuracy, and provides a more reliable technical means for the friction coefficient test of pad bolts or pad nuts. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a three-dimensional structure diagram of the present invention;

[0023] Figure 2 is a three-dimensional structure diagram of the present invention in a disassembled state;

[0024] Figure 3 is a cross-sectional view of the present invention;

[0025] Figure 4 is a three-dimensional structure diagram of the support pad in the present invention;

[0026] Figure 5 is a three-dimensional structure diagram when the bolt to be measured in the present invention is matched with the support pad;

[0027] In the figure, 1, fixed seat; 2, support pad; 3, accommodating groove; 4, central hole; 5, perforation; 6, blind hole; 7, positioning pin; 8, base; 9, disc body; 10, locking bolt; 11, through hole; 12, positioning protrusion; 13, groove; 14, positioning hole. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1: As shown in the figure, an anti-rotating tooling for gaskets includes a fixed seat 1 and a supporting pad 2. A receiving groove 3 adapted to the bolt head is provided on the fixed seat 1. The supporting pad 2 is detachably connected to the upper end of the fixed seat 1 through a connecting component. A central hole 4 for the rod portion of the bolt to pass through is provided at the center of the supporting pad 2. Two through holes 5 for the drill bit to pass through are symmetrically provided on the supporting pad 2. The through holes 5 penetrate up and down. Two blind holes 6 for installing positioning pins 7 are symmetrically provided on the supporting pad 2. The distance between the center of the blind hole 6 and the center of the central hole 4 is equal to the distance between the center of the through hole 5 and the center of the central hole 4.

[0030] When using this device, it includes the following steps:

[0031] Step 1: Fix the bolt

[0032] 1. Fix the fixed seat 1 on the drill press table, ensuring that the fixed seat 1 is in a horizontal state;

[0033] 2. Place the head of the bolt to be tested into the receiving groove 3 on the fixed seat 1, ensuring that the bolt head matches the shape of the receiving groove 3 and can be stably fixed in the receiving groove 3;

[0034] 3. Fix the supporting pad 2 on the fixed seat 1 through the connecting component, ensuring that the central hole 4 on the supporting pad 2 is adapted to the bolt rod portion, so that the bolt rod portion can smoothly pass through the central hole 4.

[0035] Step 2: Pretreatment

[0036] 1. Confirm that the bolt head has been stably fixed in the receiving groove 3 and check whether the supporting pad 2 has been firmly fixed on the fixed seat 1;

[0037] 2. Through the two through holes 5 on the supporting pad 2, use a drill bit to drill two holes with appropriate depths on the back of the gasket of the bolt. The drilling depth is adjusted according to the thickness of the gasket and the test requirements. Generally, the drilling depth should not exceed 1 / 2 of the total thickness of the gasket to avoid damaging the gasket;

[0038] 3. Confirm that the drilling is completed, and the distance between the center points of the two through holes 5 and the center of the central hole 4 is equal to the distance between the center of the blind hole 6 and the center of the central hole 4, so as to ensure that the centers of the through holes 5 and the blind holes 6 are symmetrically distributed.

[0039] Step Three: Install the positioning pin 7

[0040] 1. Install the positioning pin 7 into the two blind holes 6 on the support pad 2, ensuring that the positioning pin 7 can be firmly fixed within the blind holes 6;

[0041] 2. Check whether the positioning pin 7 is installed in place, and ensure that the height of the positioning pin 7 matches the depth of the hole processed on the gasket, so that the positioning pin 7 can effectively restrict the rotation of the gasket during the test.

[0042] Step Four: Conduct the test

[0043] 1. Fix the pre-treated bolt on the support pad 2, ensuring that the rod part of the bolt is aligned with the central hole 4 of the support pad 2 and there is no looseness;

[0044] 2. Install the support pad 2 onto the friction coefficient testing instrument to conduct the friction coefficient test.

[0045] In this embodiment, the fixing base 1 includes a base 8 and a disc body 9 formed integrally. The base 8 is fixed to the lower end of the disc body 9, and the base 8 has a rectangular structure.

[0046] Embodiment Two: As shown in the figure, different from Embodiment One, the cross-section of the receiving groove 3 has a hexagonal structure, and the receiving groove 3 is provided with a through hole from top to bottom.

[0047] This anti-rotation tooling for gaskets designs the receiving groove 3 to have a hexagonal structure and be through from top to bottom. This not only facilitates the fixing of the bolt head but also improves the accuracy and efficiency of the test. First, the hexagonal structure matches the shape of the bolt head, can firmly fix the bolt head, and prevent it from rotating or displacing during the test. Compared with the circular or square receiving groove 3, the hexagonal structure can provide more contact surfaces, enhancing the fixing effect and ensuring that the bolt head always remains stable, avoiding test errors caused by shaking. Second, the design of the through hole from top to bottom in the receiving groove 3 simplifies the bolt installation process. There is no need to fully insert the bolt head into the receiving groove 3, and only a part of the bolt head needs to be inserted, which is convenient for operation, saves time, and improves the test efficiency. In addition, the through-hole design from top to bottom can also facilitate observing whether the bolt head has been fully fixed in the receiving groove 3, reducing the possibility of operation errors.

[0048] In this embodiment, the connecting component includes two locking bolts 10. Two through holes 11 are symmetrically formed on the support pad 2. After the locking bolts 10 pass through the corresponding through holes 11, they are screwed onto the fixing base 1.

[0049] The design realizes a stable and convenient connection method by symmetrically setting two through holes 11 on the support pad 2 and using two locking bolts 10. After the locking bolts 10 pass through the corresponding through holes 11, they match with the threaded holes on the fixing seat 1, and the support pad 2 is firmly fixed on the fixing seat 1 by threaded fastening. This symmetrical design not only ensures a stable connection between the support pad 2 and the fixing seat 1, but also ensures the horizontal state of the support pad 2, preventing tilting or deviation during the test, thereby improving the accuracy of the test results.

[0050] The use of the locking bolt 10 further enhances the reliability of the connection. The locking bolt 10 can effectively prevent the support pad 2 from loosening during use through threaded tightening. Even if it is subjected to impact or vibration during processing, it can ensure that the support pad 2 is firmly fixed on the fixing seat 1, thereby ensuring the stability and accuracy of the test process.

[0051] In addition, this connection method has a simple structure and is easy to operate. It only requires the locking bolt 10 to pass through the through hole 11 and then be screwed onto the fixing base 1. No other complicated installation steps are required, which makes it convenient for operators to quickly install and remove the support pad 2, thereby improving processing efficiency.

[0052] Embodiment 3: As shown in the figure, different from Embodiment 2, a positioning protrusion 12 is further provided at the lower end of the support pad 2, and a groove 13 matching the positioning protrusion 12 is opened at the upper end of the fixed seat 1. The positioning protrusion 12 cooperates with the groove 13 to limit the movement of the support pad 2 on the fixed seat 1.

[0053] In the above structure, a positioning protrusion 12 is provided at the lower end of the support pad 2, and a matching groove 13 is opened at the upper end of the fixing seat 1. Through the cooperation between the positioning protrusion 12 and the groove 13, the movement of the support pad 2 on the fixing seat 1 is limited, thereby effectively ensuring the stability of the support pad 2 and the accuracy of the test process.

[0054] Specifically, after the positioning protrusion 12 is embedded in the groove 13, the support pad 2 can be firmly fixed to limit its movement on the fixing base 1. Even if it is subjected to slight impact or vibration during the test, the support pad 2 will not slide or deflect, thereby ensuring the stability of the test process.

[0055] This ingenious design not only ensures the stable position of the support pad 2, but also prevents the support pad 2 from slipping on the fixing seat 1. If the support pad 2 slips on the fixing seat 1, it will cause the position of the bolt rod and the center hole 4 of the support pad 2 to deviate, thereby affecting the contact position between the test probe and the bolt to be tested, and ultimately causing inaccurate test results. Therefore, by setting the positioning protrusion 12 and the groove 13, this design effectively solves the problem of fixing the support pad 2, ensures the horizontal state of the gasket during the drilling process, and improves the processing accuracy and reliability.

[0056] In this embodiment, a positioning hole 14 for cooperating with a friction coefficient sensor is further provided on the support pad 2.

[0057] In the above structure, the design of the positioning hole 14 enables the support pad 2 to be accurately positioned with the friction coefficient sensor, thereby improving the efficiency and accuracy of the test and facilitating rapid assembly.

[0058] In this embodiment, the centers of the two through holes 5 and the centers of the two blind holes 6 form a centrosymmetric cross-shaped structure.

[0059] The cross-shaped structure makes the installation of the positioning pin 7 and other components simpler and more intuitive, and is also conducive to drilling. The operator can easily confirm the correct processing positions of all components, avoiding incorrect assembly or unnecessary adjustments. This structure also reduces the time and cost during the assembly process.

[0060] The above is only a preferred embodiment of the present utility model and is not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tool for preventing gasket rotation, characterized in that: It includes a fixing seat and a supporting pad, wherein the fixing seat is provided with a receiving groove matched with the bolt head, the supporting pad is detachably connected to the upper end of the fixing seat through a connecting assembly, and the center of the supporting pad is provided with a center hole for the rod of the bolt to pass through, and the supporting pad is also symmetrically provided with two through holes for the drill bit to pass through, and the through holes are set through from top to bottom, and the supporting pad is also symmetrically provided with two blind holes for installing locating pins, and the distance between the center of the blind hole and the center of the center hole is equal to the distance between the center of the through hole and the center of the center hole.

2. The anti-gasket rotation tool according to claim 1, characterized in that: The fixing seat comprises a base and a disc body which are integrally formed. The base is fixed at the lower end of the disc body, and the base is in a rectangular structure.

3. The anti-gasket rotation tool according to claim 2, characterized in that: The cross section of the receiving groove is a hexagonal structure, and the receiving groove is vertically connected.

4. The anti-gasket rotation tool according to claim 1, characterized in that: The connecting assembly includes two locking bolts. Two through holes are symmetrically provided on the supporting pad. The locking bolts pass through the corresponding through holes and are screwed onto the fixing seat.

5. The anti-gasket rotation tool according to claim 1, characterized in that: The lower end of the support pad is also provided with a positioning protrusion, and the upper end of the fixing seat is provided with a groove matched with the positioning protrusion. The positioning protrusion cooperates with the groove to limit the movement of the support pad on the fixing seat.

6. The anti-gasket rotation tool according to claim 1, characterized in that: The support pad is also provided with a positioning hole for cooperating with the friction coefficient sensor.

7. The anti-gasket rotation tool according to claim 1, characterized in that: The centers of the two through holes and the centers of the two blind holes form a centrosymmetrical cross structure.

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