A microhardness auxiliary device

Abstract

The present invention belongs to the technical field of testing equipment for steel materials, and in particular, relates to an auxiliary device for microhardness. The present invention achieves the purpose of safely and effectively pushing out wires of all specifications after the testing is completed by arranging a support block, a V-groove, a reset cylinder unit, a rotating plate unit and an elastic column unit on the bottom plate. The present invention has the following advantages: First, in the auxiliary support device for wire hardness testing, the push-type wire feeding structure is simple and effective, and the pushing operation is convenient and fast; second, the pushing structure is effective for most specifications of pipes and all rods, and the rotating plate unit responsible for pushing is not easy to hit the support block; third, for pipes that cannot be pushed by the rotating plate unit, the elastic column unit can be extended downward, which will not hit the support block strongly and can also smoothly push out the pipe of the specific specification.

Description

Technical Field

[0001] The invention belongs to the technical field of testing equipment for steel materials, and in particular relates to an auxiliary device for microhardness. Background Art

[0002] Microhardness tester is used to detect the hardness of products such as steel pipes, steel rods and steel wires. Its structure mainly includes a microscope eyepiece system and a diamond pressing system. The general principle is that the groove formed after the diamond is pressed on the surface of the object to be tested can be observed by the microscope eyepiece, and then the groove size is measured. Under the same pressure, the larger the size, the smaller the hardness, and vice versa.

[0003] However, in the process of using the microhardness tester, the object to be tested often rolls or is not pressed accurately. Therefore, a clamping base is needed to be used with the microhardness tester. The common clamping base is a support block with a V-shaped opening, which can firmly clamp the object to be tested.

[0004] On the other hand, the existing V-shaped clamping base has the problem of being difficult to remove the object to be tested from the V-shaped groove when in use. This is particularly obvious when a relatively thin object to be tested is being measured. It is difficult for the operator's fingers to pick out the thin object to be tested from the V-shaped groove.

[0005] Therefore, in summary, there is an urgent need for a structurally improved V-shaped support seat with a convenient material feeding function for the microhardness testing of steel wires.

[0006] A Chinese utility model patent with patent announcement number CN210269469U and announcement date 2020.04.07 discloses a steel Rockwell hardness test bench, in which a support plate is fixed on a cylindrical base, a V-groove B is provided on the support plate, two side plates are vertically fixed on the support plate, two relatively arranged clamping blocks are provided between the two side plates, the two clamping blocks are respectively threadedly connected to the two side plates by a clamping screw, V-grooves A are respectively provided on the corresponding surfaces of the two clamping blocks, and the V-groove B on the support plate and the V-groove A on the clamping block are arranged in parallel.

[0007] However, the structure of the test bench in the utility model patent only includes a V-shaped groove, so when the steel is removed from the V-shaped groove, it must be picked out by hand, which is very time-consuming and labor-intensive, and ultimately reduces the efficiency of the entire detection operation. Summary of the invention

[0008] The present invention provides a microhardness auxiliary device, which can achieve the purpose of safely and effectively pushing out wires of all specifications after testing by arranging a support block, a V-shaped groove, a reset cylinder unit, a rotating plate unit and an elastic column unit on a bottom plate.

[0009] The technical solution adopted by the present invention to solve the above-mentioned problem is: a microhardness auxiliary device, including a base plate, a support block arranged on the base plate, and a V-shaped groove arranged on the support block, and also includes a reset cylinder unit arranged on the base plate, a rotating plate unit arranged on the reset cylinder unit and used to push the wire outward, and an elastic column unit arranged in the rotating plate unit and used to push the tubular wire outward by extending downward.

[0010] A further preferred technical solution is that the reset cylinder unit includes a fixed cylinder arranged on the upper surface of the base plate, a rotating cylinder sleeved on the fixed cylinder, and a torsion spring arranged on the annular surface of the fixed cylinder and the inner annular surface of the rotating cylinder.

[0011] A further preferred technical solution is that the rotating plate unit includes a radial plate arranged on the outer annular surface of the rotating cylinder, a vertical pushing plate arranged on the radial outer end side of the radial plate and used to directly push the wire, and an extension column arranged between the radial plate and the vertical pushing plate and used to extend the vertical pushing plate into the V-shaped groove.

[0012] A further preferred technical solution is that the rotating plate unit further comprises an elastic sheet arranged on the side surface of the radial plate and used for performing a buffering and anti-collision operation on the side surface of the supporting block.

[0013] A further preferred technical solution is that the vertical distance between the lower surface of the vertical push plate and the lowest point of the V-shaped groove is 5-9 mm.

[0014] A further preferred technical solution is that the elastic column unit includes a vertical groove opened upward from the lower surface of the vertical push plate, a mounting channel arranged between the inner side of the vertical groove and the outer side of the radial plate, an elastic column arranged in the vertical groove and used to push the tubular wire outward by extending downward to vertically extend the vertical push plate, a tensioning rope portion arranged in the vertical groove and used to upwardly retract the elastic column, and a pushing column portion arranged on the mounting channel and used to lower the elastic column by pushing and unfolding the tensioning rope portion.

[0015] A further preferred technical solution is that the tensioning rope portion includes a connecting rope with an upper end arranged on the top surface of the vertical groove and a lower end arranged on the upper surface of the elastic column, two engaging grooves respectively arranged on two opposite side surfaces of the vertical groove, a sliding rod with two ends respectively inserted into the engaging grooves and used to bypass the connecting rope, and a return spring arranged in the engaging groove and used to push the sliding rod toward the pushing column portion.

[0016] A further preferred technical solution is that the pushing column portion includes a column rod which is inserted into the mounting hole and has an exposed pressing end on the side of the radial plate, and a circular limiting piece which is arranged on the inner end of the column rod and is used to push the sliding rod.

[0017] A further preferred technical solution is that the tensioning rope portion also includes a limit rod arranged in the locking groove and used to adjust the return spring, and an arc groove arranged on the end surface of the sliding rod and used to insert and install the limit rod, and the central angle range of the arc groove is greater than 180°.

[0018] A further preferred technical solution is that the tensioning rope portion further includes an annular groove provided on the sliding rod and used for embedding and bypassing the connecting rope.

[0019] The present invention has the following advantages: First, in the auxiliary support device for wire hardness detection, the push-type wire feeding structure is simple and effective, and the pushing operation is convenient and quick; second, the pushing structure is effective for most specifications of pipes and all rods, and the rotating plate unit responsible for pushing is not easy to hit the support block; third, for pipes that cannot be pushed by the rotating plate unit, the elastic column unit can be extended downward, which will not hit the support block strongly and can also smoothly push out the pipe of the specific specification; fourth, the wire pushing structure of the entire auxiliary device is reasonable and effective, which saves the trouble of picking out the wire and makes the entire hardness microscopic detection operation more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the use of the present invention.

[0021] Figure 2 It is a schematic diagram of the position structure of the resetting cylinder unit and the rotating plate unit in the present invention.

[0022] Figure 3 It is a schematic diagram of the use of the rotating plate unit in the present invention.

[0023] Figure 4 It is a schematic diagram of a situation in which the vertical push plate in the present invention cannot smoothly push out the pipe.

[0024] Figure 5 It is a schematic diagram of the position structure of the elastic column unit in the present invention.

[0025] Figure 6 It is a schematic diagram of the position structure of the tensioning rope portion in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the sliding rod in the present invention. DETAILED DESCRIPTION

[0027] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0028] Example: As attached Figure 1-7 As shown, a microhardness auxiliary device includes a base plate 11, a support block 12 arranged on the base plate 11, and a V-shaped groove 13 arranged on the support block 12, and also includes a reset cylinder unit 1 arranged on the base plate 11, a rotating plate unit 2 arranged on the reset cylinder unit 1 and used to push out the wire a, and an elastic column unit 3 arranged in the rotating plate unit 2 and used to push out the tubular wire a by extending downward.

[0029] In this embodiment, the function of the reset cylinder unit 1 is that if no external force is applied to the rotating plate unit 2, the reset cylinder unit 1 can keep the rotating plate unit 2 in a state away from the V-shaped groove 13, and the rotating plate unit 2 is directly used to push the wire a outward, that is, push it out along the long axis of the wire a.

[0030] However, we found during use that the rotating plate unit 2 has flexibility. If the bottom of the rotating plate unit 2 enters by rubbing against the V-shaped groove 13, then after a period of use, the rotating plate unit 2 will sag downward and directly hit the side of the support block 12, which is not allowed. Therefore, the bottom of the rotating plate unit 2 needs to be higher than the bottom of the V-shaped groove 13 by a certain distance.

[0031] Then the new problem that follows is that if wire a is a solid rod-shaped structure, then wire a of all specifications can be pushed out smoothly, which is no problem. However, if wire a is tubular, the rotating plate unit 2 will directly enter the tube after rotation and will not be able to push the side of the tube body. This makes the pushing and unloading action of the rotating plate unit 2 effective. Therefore, the present application introduces the elastic column unit 3 to supplement the height difference between the bottom of the rotating plate unit 2 and the lowest point of the V-shaped groove 13, ensuring that tubular wires of any specifications can be pushed out, and the elastic column unit 3 can even directly hit the side of the support block 12. After all, the elastic column unit 3 is soft, but it is enough to push out the tube.

[0032] The reset cylinder unit 1 includes a fixed cylinder 101 disposed on the upper surface of the bottom plate 11 , a rotating cylinder 102 sleeved on the fixed cylinder 101 , and a torsion spring 103 disposed on the annular surface of the fixed cylinder 101 and the inner annular surface of the rotating cylinder 102 .

[0033] The rotating plate unit 2 includes a radial plate 201 arranged on the outer annular surface of the rotating cylinder 102, a vertical push plate 202 arranged on the radial outer end side of the radial plate 201 and used to directly push the wire a, and an extension column 203 arranged between the radial plate 201 and the vertical push plate 202 and used to extend the vertical push plate 202 into the V-shaped groove 13.

[0034] The rotating plate unit 2 further includes an elastic sheet 204 disposed on the side of the radial plate 201 and used for buffering and preventing the side of the supporting block 12 from collision.

[0035] In this embodiment, the elastic sheet 204 is made of rubber with medium elasticity and is bonded to the side surface of the radial plate 201 .

[0036] The vertical distance between the lower surface of the vertical push plate 202 and the lowest point of the V-shaped groove 13 is 5-9 mm.

[0037] In this embodiment, the outer diameter of the wire a is subject to a minimum value limit, that is, the diamond press block cannot touch the side of the V-shaped groove 13 before sufficiently compressing the wire a. Therefore, the tubular wire a within a reasonable range can be smoothly pushed by the vertical push plate 202 when the diameter is relatively small. When the inner diameter of the tubular wire a is within a specific range, it will not touch the vertical push plate 202 and cannot be smoothly pushed out. Moreover, the vertical length of the vertical push plate 202 cannot be set very long, otherwise it will hit the microhardness instrument. This is the reason why the elastic column unit 3 is introduced.

[0038] The elastic column unit 3 includes a vertical groove 301 opened upward from the lower surface of the vertical push plate 202, a mounting channel 302 arranged between the inner side of the vertical groove 301 and the outer side of the radial plate 201, an elastic column 303 arranged in the vertical groove 301 and used to push the tubular wire a outward by extending downward to vertically extend the vertical push plate 202, a tensioning rope portion 304 arranged in the vertical groove 301 and used to upwardly retract the elastic column 303, and a pushing column portion 305 arranged on the mounting channel 302 and used to lower the elastic column 303 by pushing and unfolding the tensioning rope portion 304.

[0039] In this embodiment, the tensioning rope portion 304 has a tendency to pull up the elastic column 303, and this tendency can only be alleviated when the pushing column portion 305 is pushed inward, so that the elastic column 303 can be released downward. The material of the elastic column 303 is the commonly used medium elastic rubber.

[0040] The tensioning rope portion 304 includes a connecting rope 304a whose upper end is arranged on the top surface of the vertical groove 301 and whose lower end is arranged on the upper surface of the elastic column 303, two engaging grooves 304b respectively arranged on two opposite sides of the vertical groove 301, a sliding rod 304c whose two ends are respectively inserted into the engaging grooves 304b and used to bypass the connecting rope 304a, and a return spring 304d arranged in the engaging grooves 304b and used to push the sliding rod 304c toward the pushing column portion 305. The pushing column portion 305 includes a columnar rod 305a inserted in the installation channel 302 and having a pressing end exposed on the side of the radial plate 201, and a circular limiting piece 305b arranged on the inner side end of the columnar rod 305a and used to push the sliding rod 304c. The tension rope part 304 further includes a limit rod 304e disposed in the engaging groove 304b and used to adjust the return spring 304d, and an arc groove 304f disposed on the end surface of the sliding rod 304c and used to insert and install the limit rod 304e, wherein the central angle of the arc groove 304f is greater than 180°. The tension rope part 304 further includes an annular groove 304g disposed on the sliding rod 304c and used to be inserted and bypassed around the connecting rope 304a.

[0041] In this embodiment, the return spring 304d is sleeved on the limit rod 304e and pressed against the two ends of the sliding rod 304c, so that the sliding rod 304c is located on the side, so that the connecting rope 304a can be tightened to a bending state. At this time, the elastic column 303 is pulled upward to retract into the vertical groove 301, which does not affect the independent use of the vertical push plate 202.

[0042] When the vertical push plate 202 cannot push the tubular wire, the column rod 305a is pushed inward and maintained, and the elastic column 303 also falls. At this time, the elastic column 303 slightly hits the side of the support block 12, or bends forward on the V-shaped groove 13, so as to push out the tube body that could not be pushed out by the vertical push plate 202 alone. This is very clever.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A microhardness auxiliary device, comprising a base plate (11), a support block (12) arranged on the base plate (11), and a V-shaped groove (13) arranged on the support block (12), characterized in that: It also comprises a reset cylinder unit (1) arranged on the bottom plate (11), a rotating plate unit (2) arranged on the reset cylinder unit (1) and used to push the wire (a) outwards, and an elastic column unit (3) arranged in the rotating plate unit (2) and used to push the tubular wire (a) outwards by extending downwards. The reset cylinder unit (1) comprises a fixed cylinder (101) arranged on the upper surface of the base plate (11), a rotating cylinder (102) sleeved on the fixed cylinder (101), and a torsion spring (103) arranged on the annular surface of the fixed cylinder (101) and the inner annular surface of the rotating cylinder (102). The rotating plate unit (2) comprises a radial plate (201) arranged on the outer annular surface of the rotating cylinder (102), a vertical pushing plate (202) arranged on the radial outer end side surface of the radial plate (201) and used to directly push the wire (a), and an extension column (203) arranged between the radial plate (201) and the vertical pushing plate (202) and used to extend the vertical pushing plate (202) into the V-shaped groove (13). The rotating plate unit (2) further comprises an elastic sheet (204) arranged on a side surface of the radial plate (201) and used for performing a buffering and anti-collision operation on a side surface of the support block (12). The vertical distance between the lower surface of the vertical push plate (202) and the lowest point of the V-shaped groove (13) is 5-9 mm. The elastic column unit (3) comprises a vertical groove (301) opened upward from the lower surface of the vertical pushing plate (202), a mounting hole (302) arranged between the inner side surface of the vertical groove (301) and the outer side surface of the radial plate (201), an elastic column (303) arranged in the vertical groove (301) and used to push out the tubular wire (a) by extending downward to vertically extend the vertical pushing plate (202), a tensioning rope portion (304) arranged in the vertical groove (301) and used to retract the elastic column (303) upward, and a pushing column portion (305) arranged on the mounting hole (302) and used to lower the elastic column (303) by pushing and unfolding the tensioning rope portion (304). The tensioning rope portion (304) comprises a connecting rope (304a) whose upper end is arranged on the top surface of the vertical groove (301) and whose lower end is arranged on the upper surface of the elastic column (303), two engaging grooves (304b) respectively arranged on two opposite side surfaces of the vertical groove (301), a sliding rod (304c) whose two ends are respectively inserted into the engaging grooves (304b) and used to bypass the connecting rope (304a), and a return spring (304d) arranged in the engaging groove (304b) and used to push the sliding rod (304c) toward the pushing column portion (305).

2. The microhardness auxiliary device according to claim 1, characterized in that: The pushing column portion (305) comprises a column rod (305a) inserted in the installation channel (302) and having an exposed pressing end on the side of the radial plate (201), and a circular limiting piece (305b) arranged on the inner end of the column rod (305a) and used to push the sliding rod (304c).

3. The microhardness auxiliary device according to claim 1, characterized in that: The tensioning rope portion (304) further comprises a limiting rod (304e) arranged in the engaging groove (304b) and used for adjusting the return spring (304d), and an arcuate groove (304f) arranged on the end surface of the sliding rod (304c) and used for inserting and installing the limiting rod (304e), wherein the central angle range of the arcuate groove (304f) is greater than 180°.

4. The microhardness auxiliary device according to claim 1, characterized in that: The tensioning rope portion (304) further comprises an annular groove (304g) which is arranged on the sliding rod (304c) and is used for being embedded in and bypassing the connecting rope (304a).

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