Clamping tool special for testing hardness of pipe joint

Abstract

The utility model discloses a special clamping tool for testing the hardness of a pipe joint, which relates to the technical field of hardness testing and comprises a base, the bottom surface of the base is fixedly connected with an inserting rod used for being inserted into a lifting platform hole of a hardness tester, and the base is connected with a sliding rail platform in a sliding manner. According to the hardness testing device, the supporting rod and the first fixing piece are arranged, so that internal supporting and position fixing of the test piece body can be achieved, the interior of the test piece body has enough supporting force when hardness testing is conducted on the test piece body, and contour deformation of the cambered surface of the test piece body is avoided; according to the device, the hardness detection positions of the test piece bodies can be adjusted and fixed, so that the detection positions among the plurality of test piece bodies are adjustably fixed, the purpose of unifying the detection positions of all the test piece bodies is achieved, and the situation that test point positions are inconsistent when the detection positions are manually determined is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hardness testing, and specifically relates to a special clamping tool for pipe joint hardness testing. BACKGROUND

[0002] Hardness testing is one of the important indicators for detecting material performance and one of the fastest and most economical test methods.

[0003] In the mechanical manufacturing industry or the field of material research, hardness testing of materials is often carried out. Raw materials can be processed into standard products for testing according to requirements. However, for hardness testing of finished products, a suitable tool needs to be designed for clamping to meet the requirements of standard testing.

[0004] If the pipe joint with a large diameter and a thin pipe wall is not internally supported, the force application device will cause the curved surface of the test piece to deform. In addition, the circular test piece needs to be fixed in position, and displacement cannot occur during the testing process. The test site of the test piece can only be selected artificially, and the test sites of different test pieces are not uniform, which leads to non-standard testing process and inaccurate results. Therefore, the special clamping tool for pipe joint hardness testing is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at making up for the deficiency of prior art and provides a special clamping tool for pipe joint hardness testing. When the hardness is tested, the tool can internally support the pipe joint with a large diameter and a thin pipe wall through a rod-shaped structure. Meanwhile, the same position of multiple test pieces can be detected through an adjustable and fixed support position, thereby further improving the hardness testing efficiency and accuracy of the pipe joint.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a special clamping tool for pipe joint hardness testing, comprising a base, the bottom surface of the base is fixedly connected with a plug rod for being plugged into the inside of the hardness tester lifting table hole, a sliding rail table is slidingly connected above the base, a locking mechanism for limiting the sliding of the sliding rail table is arranged on the sliding rail table, a support rod is detachably connected to the upper part of the sliding rail table, a first fixing piece and a test piece body are arranged on the outer surface of the support rod, and the first fixing piece is used for fastening the test piece body.

[0007] Further, the locking mechanism comprises a threaded rod screwing into the inside of a threaded hole on the sliding rail table and a friction block slidingly connected into the inside of a square groove in the sliding rail table, and the threaded hole and the square groove are in communication and penetrate through the side surface of the sliding rail table.

[0008] Further, the threaded rod is rotationally connected with the friction block, and the threaded rod is used for driving the friction block to slide in the square groove on the sliding rail table.

[0009] Further, the end of the threaded rod outside the slide rail table is fixedly connected with a power knob, and the outer surface of the power knob is provided with anti-skid lines.

[0010] Further, the other end of the support rod is provided with a second fixing member, which is used for dismounting and mounting the support rod above the slide rail table.

[0011] Further, the part of the support rod between the slide rail table and the test piece body is sleeved with a grommet, and the pipe diameter width value of the grommet is adapted to the pipe diameter width value of the test piece body.

[0012] Further, the outer surfaces of the base and the slide rail table are provided with matched scale grooves.

[0013] Compared with the prior art, the pipe joint hardness test special clamping tool has the following beneficial effects:

[0014] 1、The support rod and the first fixing member are arranged, so that the test piece body can be internally supported and fixed in position, the test piece body has sufficient internal support when hardness testing is performed, the profile of the arc surface of the test piece body is prevented from being deformed, the slide rail table and the locking mechanism are arranged, the hardness testing position of the test piece body can be adjusted and fixed, the testing positions of the plurality of test piece bodies can be adjusted and fixed, the testing positions of the test piece bodies are unified, the situation that the testing positions are inconsistent when the testing positions are manually determined is avoided, the testing error is avoided, the testing process is standardized, and the accuracy of the testing result is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view schematic view of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a three-dimensional structure schematic view of the support rod of the utility model;

[0017] Figure 3 It is a sectional view schematic view of the three-dimensional structure of the utility model;

[0018] Figure 4 It is a three-dimensional structure schematic view of the utility model Figure 3 It is an enlarged schematic view of the structure at A in the utility model.

[0019] In the drawing: 1, base; 2, insertion rod; 3, slide rail table; 4, locking mechanism; 401, threaded rod; 402, friction block; 403, power knob; 5, support rod; 6, first fixing member; 7, test piece body; 8, second fixing member; 9, grommet. DETAILED DESCRIPTION

[0020] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not to limit the scope of the utility model.

[0021] As described in the background, if the pipe joint is not internally supported, the force applying device will cause the arc surface of the test piece to deform, and the test site of the test piece can only be selected artificially, and different test sites of different test pieces are not unified, therefore, the embodiment provides a special clamping tool for pipe joint hardness testing, which can internally support the pipe joint with a large diameter and a thin pipe wall through the rod-shaped structure when hardness testing is performed, and the same position detection between multiple test pieces can be realized through the adjustable and fixed support position, and the hardness testing efficiency and accuracy of the pipe joint are further improved.

[0022] Referring to Figure 1 - Figure 4 The embodiment provides a special clamping tool for pipe joint hardness testing, which comprises a base 1, and the bottom surface of the base 1 is fixedly connected with a plug rod 2 used for being plugged into the inside of a hardness tester lifting table hole.

[0023] The base 1 needs to be plugged into the hardness tester lifting table hole through the plug rod 2. The hardness tester is a hardness measuring device, and the inside of the hardness tester is usually provided with a liftable platform and various hole structures. The device is inserted into the inside of the hole structure through the plug rod 2, and the movement of the device is limited, so that the purpose of lifting the lifting table to drive the device to lift can be achieved.

[0024] In addition, even if the plug rod 2 and the hole structure above the lifting table have a large frictional stress and are almost not rotatable, the angle adjustment of the device in the application can still be achieved through the plugging and unplugging process. Specifically, a mark scale can be arranged above the hole structure and the plug rod 2.

[0025] A sliding rail table 3 is slidably connected to the base 1, and a locking mechanism 4 for limiting the sliding of the sliding rail table 3 is arranged on the sliding rail table 3.

[0026] As Figure 1 shown, the interactive connection between the base 1 and the sliding rail table 3 is a special-shaped structure, so that the sliding rail table 3 can only slide horizontally on the base 1 and cannot move up and down.

[0027] The locking mechanism 4 comprises a threaded rod 401 screwed into a threaded hole on the sliding rail table 3 and a friction block 402 slidably connected to a square groove in the sliding rail table 3, and the threaded hole and the square groove are in communication and penetrate through the side surface of the sliding rail table 3.

[0028] The threaded rod 401 is rotationally connected with the friction block 402, and the threaded rod 401 is used to drive the friction block 402 to slide in the square groove on the sliding rail table 3.

[0029] The threaded rod 401 is fixedly connected with a power knob 403 at one end outside the slide rail table 3, and the outer surface of the power knob 403 is provided with anti-skid lines.

[0030] The locking mechanism 4 here realizes the limiting or releasing of the slide rail table 3 through the friction between the friction block 402 and the base 1. Specifically, when the threaded rod 401 rotates, the friction block 402 cannot rotate due to the limitation of the square groove inside the slide rail table 3, and then transverse displacement of the threaded rod 401 occurs. The connecting point between the threaded rod 401 and the friction block 402 moves synchronously, thereby pulling or pushing the friction block 402, so that the friction block 402 contacts or separates from the base 1, and the purpose of limiting through friction is achieved.

[0031] The upper part of the slide rail table 3 is detachably connected with a support rod 5, and the outer surface of the support rod 5 is provided with a first fixing piece 6 and a test piece body 7. The first fixing piece 6 is used for fastening the test piece body 7.

[0032] The test piece body 7 here is the test piece that needs to be tested. After being sleeved on the support rod 5, the test piece body 7 is fastened by the first fixing piece 6. Specifically, the first fixing piece 6 is a nut-shaped structure, and the support rod 5 is a threaded convex rod-shaped structure with a threaded groove matched with the first fixing piece 6. The test piece body 7 is clamped between the slide rail table 3 and the first fixing piece 6 through the threaded connection between the two, so as to achieve the purpose of fastening the test piece body 7.

[0033] After the test piece body 7 is fastened, the hardness of the test piece body 7 can be tested through the hardness testing structure of the hardness tester.

[0034] The other end of the support rod 5 is provided with a second fixing piece 8, which is used for dismounting and mounting the support rod 5 above the slide rail table 3.

[0035] The second fixing piece 8 here is structurally equivalent to the first fixing piece 6. The purpose is to limit one end of the support rod 5 on the slide rail table 3, and cooperate with the test piece body 7 and the first fixing piece 6, so that the support rod 5 and the test piece body 7 are stable as a whole.

[0036] The part of the support rod 5 above the slide rail table 3 and the test piece body 7 is sleeved with a grommet 9, and the pipe diameter width value of the grommet 9 is adapted to the pipe diameter width value of the test piece body 7.

[0037] The grommet 9 here can avoid damage to the pipe head part of the test piece body 7. Correspondingly, the contact position of the test piece body 7 and the first fixing piece 6 can also be provided with a structure equivalent to the grommet 9, and the grommet 9 can be made of hard deformable material.

[0038] The outer surface of the base 1 and the slide rail table 3 is provided with a matched scale groove, which is used for marking the displacement distance between the slide rail table 3 and the base 1, and other marking measures can also be provided for realization, and the most efficient way can be selected according to the actual working condition.

[0039] Working principle: firstly, the device is placed on the lifting platform of the hardness tester at a suitable angle by the inserting rod 2, the first fixing part 6 is unscrewed, the test body 7 is sleeved on the surface of the supporting rod 5, then the first fixing part 6 is tightened, the test body 7 is fastened by the first fixing part 6 and the surface of the slide rail table 3, then the power knob 403 is rotated, the threaded rod 401 drives the friction block 402 to separate from the base 1, the slide rail table 3 is adjusted to a suitable position on the base 1, then the structure in the above locking mechanism 4 is operated in reverse, the friction block 402 contacts with the base 1, the purpose of limiting by friction is realized, then the hardness test of the test body 7 can be started.

[0040] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A special fixture for pipe joint hardness test, comprising a base (1), characterized in that: The bottom surface of the base (1) is fixedly connected with a plug rod (2) for plugging into the inside of the hardness tester lifting platform hole, the base (1) is slidably connected with a sliding rail table (3), the sliding rail table (3) is provided with a locking mechanism (4) for limiting the sliding of the sliding rail table (3), the upper part of the sliding rail table (3) is detachably connected with a support rod (5), the outer surface of the support rod (5) is provided with a first fixing piece (6) and a test piece body (7), and the first fixing piece (6) is used for fastening the test piece body (7).

2. The special fixture for pipe joint hardness test according to claim 1, characterized in that: The locking mechanism (4) comprises a threaded rod (401) screwed in the threaded hole in the upper part of the sliding rail table (3), and a friction block (402) slidably connected in the square groove in the sliding rail table (3), and the threaded hole and the square groove are communicated and penetrate through the side surface of the sliding rail table (3).

3. The special fixture for pipe joint hardness test according to claim 2, characterized in that: The threaded rod (401) is rotatably connected with the friction block (402), and the threaded rod (401) is used for driving the friction block (402) to slide in the square groove on the sliding rail table (3).

4. The special fixture for pipe joint hardness test according to claim 2, characterized in that: One end of the threaded rod (401) located outside the sliding rail table (3) is fixedly connected with a power knob (403), and the outer surface of the power knob (403) is provided with anti-skid lines.

5. The special fixture for pipe joint hardness test according to claim 1, characterized in that: The other end of the support rod (5) is provided with a second fixing piece (8), and the second fixing piece (8) is used for dismounting and mounting the support rod (5) on the sliding rail table (3).

6. The special fixture for pipe joint hardness test according to claim 1, characterized in that: The part of the support rod (5) between the sliding rail table (3) and the test piece body (7) is sleeved with a grommet (9), and the pipe diameter width value of the grommet (9) is adapted to the pipe diameter width value of the test piece body (7).

7. The special fixture for pipe joint hardness test according to claim 1, characterized in that: The outer surfaces of the base (1) and the sliding rail table (3) are provided with matched scale grooves. The outer surfaces of the base (1) and the sliding rail table (3) are provided with matched scale grooves.

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