Caliper suitable for measuring U-shaped sample impacted by Charpy pendulum bob

Abstract

The utility model relates to the technical field of U-shaped sample measurement, in particular to a caliper suitable for measuring a U-shaped sample impacted by a Charpy pendulum bob, which comprises a mounting block and an extending measuring jaw, a movable block is transversely and slidably arranged on one side wall of the mounting block, an extending measuring rod is detachably sleeved at the right end of the movable block in a threaded manner, and a sliding seat is transversely and slidably arranged on the extending measuring rod. One side wall of the sliding seat is detachably provided with a positioning measuring jaw which can abut against the end part of the U-shaped sample, and the top ends of the movable block and the extension measuring rod are provided with scale marks. The length of the transverse position of the sliding seat on the extending measuring rod is read to be directly converted into the distance from the symmetric plane of the notch of the U-shaped sample to the end part, the central point position of the U-shaped sample does not need to be found on site and an auxiliary central line does not need to be drawn manually, rapid on-site operation and use are facilitated, meanwhile, manual errors caused by finding and drawing the auxiliary line are avoided, and the working efficiency is improved. Therefore, the measurement accuracy of the distance from the notch symmetry plane to the end part of the U-shaped sample is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of U-shaped sample measurement, in particular to a caliper suitable for measuring a U-shaped sample impacted by a Charpy pendulum. Background Art

[0002] The Charpy pendulum impact test is a test method commonly used to test the impact toughness of metal materials. The relevant standards include GB / T 229, EN ISO 148-1 and ASTM E23. The principles of these three impact test standards are to place a notched specimen of specified geometry between two supports of the testing machine, with the notch facing away from the striking surface, and to break the specimen once with a pendulum to measure the absorbed energy of the specimen. The standards related to the Charpy pendulum impact test have detailed requirements for the size and deviation of the U-notch specimen. When testing, the distance from the notch symmetry plane to the end of the specimen needs to be measured. In actual measurement, a conventional vernier caliper is usually used. Since the position of the notch symmetry plane of the specimen cannot be directly determined, it is necessary to determine it by drawing auxiliary lines on the specimen. However, due to the small size of the specimen, the center point is not easy to determine, and the on-site measurement operation is inconvenient. In addition, unnecessary dimensional deviations are easily added during the process of determining the center point, which affects subsequent measurements.

[0003] Therefore, it is necessary to invent a caliper suitable for measuring the Charpy pendulum impact U-shaped specimen to solve the above problems. Utility Model Content

[0004] In order to solve the shortcomings of the prior art, the purpose of the utility model is to provide a caliper suitable for measuring U-shaped specimens subjected to Charpy pendulum impact, which solves the problem that the position of the symmetry plane of the specimen notch cannot be directly determined in the prior art and needs to be determined by drawing auxiliary lines on the specimen. However, due to the small size of the specimen, the center point is not easy to determine, the on-site measurement operation is inconvenient, and unnecessary dimensional deviations are easily increased in the process of determining the center point, thereby affecting subsequent measurements.

[0005] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0006] A caliper suitable for measuring a U-shaped specimen impacted by a Charpy pendulum, comprising a mounting block and an inserting measuring claw detachably mounted on the bottom end of the mounting block and insertable into a notch of the U-shaped specimen, wherein the cross-sectional shape of the inserting measuring claw is consistent with the cross-sectional shape of the U-shaped notch of the U-shaped specimen, a movable block capable of controlling the sliding distance is transversely slidably provided on one side wall of the mounting block, an extended measuring rod is detachably threadedly sleeved on the right end of the movable block, a sliding seat is transversely slidably provided on the extended measuring rod, a positioning measuring claw capable of abutting against the end of the U-shaped specimen is detachably mounted on one side wall of the sliding seat, scale lines are provided on the movable block and the top end of the extended measuring rod, and the starting point of the scale line of the movable block is consistent with the center line of the inserting measuring claw.

[0007] As a preferred solution of the utility model, an extension stud is extended to form a side wall of the mounting block, the movable block is laterally slidably sleeved on the extension stud, and the extension studs are threadedly sleeved with first nuts at positions on both sides of the movable block, and the two first nuts can lock the lateral sliding distance of the movable block.

[0008] As a preferred solution of the utility model, a slot is provided in the mounting block, the top of the measuring claw is connected with a first mounting stud which can pass through the slot, and a second nut is provided on the threaded portion of the first mounting stud located above the mounting block.

[0009] As a preferred solution of the utility model, side sliding grooves are provided on both symmetrical side walls of the extended measuring rod, and a positioning stud is provided at one end of the extended measuring rod away from the movable block, and a sealing block is provided on the threaded sleeve of the positioning stud.

[0010] As a preferred solution of the utility model, both side walls inside the slide seat extend to form sliding blocks that can slide laterally along the side slide grooves.

[0011] As a preferred solution of the utility model, a second mounting stud is extended from one side wall of the slide seat, the positioning claw is detachably mounted on the second mounting stud via an L-shaped connecting frame, and a third nut is threadedly sleeved on the second mounting stud.

[0012] As a preferred solution of the utility model, the outer peripheral side wall of the inserted measuring claw is detachably provided with a surrounding rubber sleeve, and a side wall where the positioning measuring claw abuts against the end of the U-shaped specimen is fitted and connected with a side rubber plate.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] In the utility model, for a certain type of commonly used U-shaped specimen, an insertion measuring claw with a cross-sectional shape consistent with the cross-sectional shape of the U-shaped notch of the U-shaped specimen is used, and the insertion measuring claw is inserted into the notch of the U-shaped specimen to fix the position of the entire caliper and the U-shaped specimen, that is, the starting point of the scale line of the movable block is consistent with the center line of the insertion measuring claw. At this time, it is only necessary to slide the slide seat horizontally until the side edge of the positioning measuring claw abuts against the end of the U-shaped specimen, and the distance from the symmetrical surface of the notch of the U-shaped specimen to the end can be directly converted by reading the lateral position length of the slide seat on the extended measuring rod. There is no need to find the center point position of the U-shaped specimen on site and manually draw the auxiliary center line, which is convenient for quick operation on site and avoids artificial errors caused by finding and drawing auxiliary lines, thereby improving the measurement accuracy of the distance from the symmetrical surface of the notch of the U-shaped specimen to the end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the plan view of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from below;

[0018] Figure 4 It is a schematic diagram of the overall structure of the utility model when measuring a U-shaped specimen.

[0019] Description of reference numerals:

[0020] 1. Mounting block; 2. Extending claw; 3. Extending stud; 4. Movable block; 5. Extending measuring rod; 6. Side slide groove; 7. Positioning stud; 8. Sealing block; 9. Sliding seat; 10. Sliding block; 11. L-shaped connecting frame; 12. Positioning claw; 13. Surrounding rubber sleeve; 14. Side rubber plate; 15. First mounting stud; 16. Second mounting stud; 17. First nut; 18. Second nut; 19. Third nut; 20. Slot. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0022] The utility model provides Figure 1-Figure 4 The caliper shown is suitable for measuring a U-shaped specimen impacted by a Charpy pendulum, comprising a mounting block 1 and an insertion claw 2 which is detachably mounted on the bottom end of the mounting block 1 and can be inserted into the notch of the U-shaped specimen. The cross-sectional shape of the insertion claw 2 is consistent with the cross-sectional shape of the U-shaped notch of the U-shaped specimen. A movable block 4 which can control the sliding distance is slidably arranged on one side wall of the mounting block 1. An extended measuring rod 5 is detachably threadedly sleeved on the right end of the movable block 4. A slide seat 9 is slidably arranged on the extended measuring rod 5. A positioning claw 12 which can abut against the end of the U-shaped specimen is detachably mounted on one side wall of the slide seat 9. Scale lines are arranged on the top ends of the movable block 4 and the extended measuring rod 5. The starting point of the scale line of the movable block 4 is consistent with the center line of the insertion claw. The specific technical implementation scheme is as follows: according to the requirements of the GB / T 229 standard, the commonly used notch radius of the U-shaped specimen is (1 mm ± 0.07 mm). According to this size, an insertion claw 2 with an end face radius of 0.95 mm is designed, which is within a reasonable error range and can facilitate the insertion of the insertion claw 2 into the U-shaped specimen.

[0023] An extension stud 3 is formed by extending one side wall of the mounting block 1, and the movable block 4 is laterally slidably sleeved on the extension stud 3, and the extension stud 3 is threadedly sleeved with first nuts 17 at positions on both sides of the movable block 4, and the two first nuts 17 can lock the lateral sliding distance of the movable block 4. The position of the movable block 4 on the extension stud 3 is determined according to the length from the notch to the rear end of the U-shaped specimen.

[0024] A slot 20 is provided in the mounting block 1, and a first mounting stud 15 which can penetrate the slot 20 is connected to the top of the inserted measuring claw 2, and a second nut 18 is provided on a threaded sleeve of a portion of the first mounting stud 15 located above the mounting block 1. According to U-shaped specimens of different sizes, the first mounting stud 15 and the second nut 18 can be used to realize quick disassembly and replacement between the inserted measuring claw 2 and the mounting block 1, so as to replace the inserted measuring claw 2 of the required size.

[0025] The symmetrical side walls of the extended measuring rod 5 are both provided with side sliding grooves 6, and a positioning stud 7 is provided at one end of the extended measuring rod 5 away from the movable block 4, and a sealing block 8 is threadedly sleeved on the positioning stud 7. The setting of the sealing block 8 can prevent the slide seat 9 from sliding excessively and falling off.

[0026] Both side walls inside the slide 9 extend to form sliders 10 that can slide laterally along the side slide grooves 6. The sliders 10 are arranged to slide laterally along the side slide grooves 6. On the one hand, it can facilitate the slide 9 to slide laterally along the extended measuring rod 5, and on the other hand, it can avoid unnecessary rotation during the sliding process of the slide 9.

[0027] A second mounting stud 16 is extended from one side wall of the slide seat 9 , the positioning claw 12 is detachably mounted on the second mounting stud 16 via an L-shaped connecting frame 11 , and a third nut 19 is threadedly sleeved on the second mounting stud 16 .

[0028] A removable surrounding rubber sleeve 13 is provided on the outer peripheral side wall of the inserted measuring claw 2, and a side rubber plate 14 is fitted and connected to one side wall where the positioning measuring claw 12 abuts against the end of the U-shaped specimen. The surrounding rubber sleeve 13 and the side rubber plate 14 can prevent the inserted measuring claw 2 and the positioning measuring claw 12 from directly and rigidly contacting the U-shaped specimen, thereby avoiding unnecessary wear on the surface of the U-shaped specimen.

[0029] In the present invention, for a certain type of commonly used U-shaped specimen, an insertion claw 2 with a cross-sectional shape consistent with the cross-sectional shape of the U-notch of the U-shaped specimen is used, and the insertion claw 2 is inserted into the notch of the U-shaped specimen to fix the position of the entire caliper and the U-shaped specimen, that is, the starting point of the scale line of the movable block 4 is consistent with the center line of the insertion claw 2. At this time, it is only necessary to slide the slide 9 horizontally until the side of the positioning claw 12 abuts against the end of the U-shaped specimen, and the lateral position length of the slide 9 on the extended measuring rod 5 can be directly converted into the distance from the symmetric surface of the notch of the U-shaped specimen to the end. There is no need to find the center point position of the U-shaped specimen on site and manually draw the auxiliary center line, which is convenient for quick operation on site and avoids the artificial error caused by finding and drawing auxiliary lines, thereby improving the measurement accuracy of the distance from the symmetric surface of the notch of the U-shaped specimen to the end.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A caliper suitable for measuring a Charpy pendulum impact U-shaped specimen, characterized in that: The invention comprises a mounting block (1) and an insertion claw (2) which is detachably mounted on the bottom end of the mounting block (1) and can be inserted into the notch of a U-shaped specimen, wherein the cross-sectional shape of the insertion claw (2) is consistent with the cross-sectional shape of the U-shaped notch of the U-shaped specimen, a movable block (4) which can control the sliding distance is arranged on a side wall of the mounting block (1) for transverse sliding, an extension measuring rod (5) is arranged on a detachable threaded sleeve at the right end of the movable block (4), the extension measuring rod (5) is arranged for transverse sliding with a slide seat (9), a positioning claw (12) which can abut against the end of the U-shaped specimen is detachably mounted on a side wall of the slide seat (9), and scale lines are arranged on the top ends of the movable block (4) and the extension measuring rod (5), and the starting point of the scale line of the movable block (4) is consistent with the center line of the insertion claw.

2. A caliper suitable for measuring a Charpy pendulum impact U-shaped specimen according to claim 1, characterized in that: An extension stud (3) is formed by extending a side wall of the mounting block (1); the movable block (4) is laterally slidably sleeved on the extension stud (3); and first nuts (17) are threadedly sleeved on positions of the extension stud (3) located on both sides of the movable block (4); and the two first nuts (17) can lock the lateral sliding distance of the movable block (4).

3. A caliper suitable for measuring a Charpy pendulum impact U-shaped specimen according to claim 1, characterized in that: A slot (20) is provided in the mounting block (1), a first mounting stud (15) that can penetrate the slot (20) is connected to the top of the inserted measuring claw (2), and a second nut (18) is threadedly sleeved on a portion of the first mounting stud (15) located above the mounting block (1).

4. The caliper suitable for measuring a Charpy pendulum impact U-shaped specimen according to claim 1, characterized in that: The symmetrical two side walls of the extended measuring rod (5) are both provided with side sliding grooves (6), and a positioning stud (7) is provided at one end of the extended measuring rod (5) away from the movable block (4), and a sealing block (8) is threadedly sleeved on the positioning stud (7).

5. A caliper suitable for measuring a Charpy pendulum impact U-shaped specimen according to claim 4, characterized in that: Both side walls inside the slide seat (9) extend to form sliding blocks (10) that can slide laterally along the side slide grooves (6).

6. The caliper suitable for measuring a Charpy pendulum impact U-shaped specimen according to claim 1, characterized in that: A second mounting stud (16) is formed by extending from one side wall of the slide seat (9), the positioning claw (12) is detachably mounted on the second mounting stud (16) via an L-shaped connecting frame (11), and a third nut (19) is threadedly sleeved on the second mounting stud (16).

7. The caliper suitable for measuring a U-shaped specimen by a Charpy pendulum impact according to claim 1, characterized in that: The outer peripheral side wall of the inserted measuring claw (2) is detachably covered with a surrounding rubber sleeve (13), and the positioning measuring claw (12) is fitted with a side rubber plate (14) on a side wall abutting against the end of the U-shaped test specimen.

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