Metal pipe flaring test sample positioning device

Abstract

The utility model belongs to the field of metal pipe flaring test sample positioning devices, and particularly relates to a metal pipe flaring test sample positioning device which comprises a base, a mounting hole is formed between the left end and the right end of the base in a penetrating mode, a lead screw is rotatably mounted in the mounting hole, one end of the lead screw is connected with a rotation driving structure, and a positive screw and a negative screw are arranged on the lead screw. Two strip-shaped sliding holes are formed in the top of the base, moving nuts are connected to the positive screw and the negative screw correspondingly, sliding rods extending out of the strip-shaped sliding holes are fixedly connected to the two moving nuts correspondingly, connecting rods and guide sleeves are fixedly connected to the two sliding rods correspondingly, arc-shaped clamping plates are fixedly connected to the two connecting rods correspondingly, and guide shafts are connected into the two guide sleeves correspondingly. The two ends of the guide shaft are connected with an abutting block and a positioning block respectively, the guide shaft is sleeved with a spring located between the abutting block and the guide sleeve, and a dial is arranged on the guide shaft. According to the utility model, the safety of a flaring test is ensured, and the efficiency of the flaring test is greatly improved.

Description

Technical Field

[0001] The utility model relates to a positioning device for a metal pipe flaring test sample, belonging to the field of positioning devices for metal pipe flaring test samples. Background Art

[0002] As a common metal product, metal pipes are widely used in industries, construction, transportation and other fields, and the quality of metal pipes directly affects engineering safety and people's livelihood. The metal pipe flaring test is a method for testing the flaring performance of metal pipe materials, aiming to evaluate the deformation ability and durability of metal pipes under stress, and is one of the main methods for metal pipe quality inspection. The specific method is as follows: a plug with a certain taper is pressed into one end of a metal pipe sample to uniformly expand it to the flaring rate required by relevant technical specifications, and then check whether there are defects such as cracks at the flared part to determine whether the material is qualified.

[0003] In the prior art, during the metal pipe flaring test, usually the sample is placed on a lining plate, then the plug is inserted into the upper port of the sample, and then the testing machine drives the pressing plate to move downward, so as to press the plug to flare the sample. On the one hand, the sample is not fixed. If the plug is pressed offset, it is easy to cause the sample to break off, posing a safety hazard to test personnel, and the test safety is relatively low. On the other hand, during the process of pressing the plug to flare the sample, it is necessary to measure the flared outer diameter of the sample multiple times to ensure that the target size is reached, and the multiple measurement operations greatly reduce the efficiency of the flaring test. Summary of the Utility Model

[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a positioning device for a metal pipe flaring test sample that can improve test safety and test efficiency.

[0005] The positioning device for a metal pipe flaring test sample described in the utility model includes a base. An installation hole runs through between the left and right ends of the base. Both ends of the installation hole are connected with bearings through bearing end covers. A lead screw is installed between the two bearings. One end of the lead screw runs through the bearing end cover and is connected with a rotary drive structure. The lead screw is provided with a positive helix and a negative helix. Two strip-shaped sliding holes corresponding to the positive helix and the negative helix respectively are arranged on the top of the base. Moving nuts are connected to both the positive helix and the negative helix. Sliding rods extending out of the strip-shaped sliding holes are fixedly connected to both moving nuts. Connecting rods and guide sleeves are fixedly connected to both sliding rods. Arc-shaped clamping plates are fixedly connected to both connecting rods. Guide shafts are connected to both guide sleeves. The two ends of the guide shaft are respectively connected with a resisting block and a positioning block. A spring located between the resisting block and the guide sleeve is sleeved on the guide shaft. A scale is provided on the guide shaft.

[0006] Further, the rotary drive structure is a knob.

[0007] Further, when the positioning block fits with the guide sleeve, the end point of the abutting block is flush with the center of the arc-shaped clamping plate on the vertical plane.

[0008] Further, the mounting hole includes a left nut hole, a through hole, and a right nut hole arranged in sequence from left to right. The left nut hole corresponds to the reverse helix, the right nut hole corresponds to the positive helix, and the aperture of the through hole is smaller than the apertures of the left nut hole and the right nut hole.

[0009] Further, the sliding rod includes an outer rod fixedly connected to the moving nut. The outer rod extends out of the strip-shaped sliding hole. An inner rod is slidably connected inside the outer rod. The upper end of the inner rod extends out of the outer rod and is fixedly connected to the guide sleeve. An inner rod locking assembly is connected between the outer rod and the inner rod.

[0010] Further, the inner rod locking assembly includes a set screw threadedly connected to the upper end of the outer rod. The set screw penetrates through the side wall of the outer rod and corresponds to the inner rod.

[0011] The beneficial effects of the present utility model compared with the prior art are as follows:

[0012] For the metal pipe flaring test sample positioning device of the present utility model, the sample can be clamped and positioned by two arc-shaped clamping plates, thereby preventing the sample from breaking off during the flaring process and ensuring the safety of the flaring test; the flaring size of the sample can be monitored in real time through the dial, thereby ensuring successful flaring at one time, avoiding multiple measurement operations, and greatly improving the efficiency of the flaring test. Description of the Drawings

[0013] Figure 1 is the front view of the present utility model;

[0014] Figure 2 is the top view of the present utility model;

[0015] Figure 3 is Figure 2 the sectional view at A-A in

[0016] Figure 4 is the front view of the present utility model before the flaring test;

[0017] Figure 5 is the front view of the present utility model after the flaring test.

[0018] In the figure: 1, rotary drive structure; 2, lead screw; 3, bearing end cover; 4, base; 5, outer rod; 6, connecting rod; 7, arc-shaped clamping plate; 8, set screw; 9, inner rod; 10, positioning block; 11, guide sleeve; 12, guide shaft; 13, spring; 14, abutting block; 15, positive helix; 16, reverse helix; 17, strip-shaped sliding hole; 18, moving nut; 19, sample; 20, dial; 21, top core; 22, left nut hole; 23, through hole; 24, bearing; 25, right nut hole. Detailed implementation mode

[0019] The following further describes the embodiments of the present utility model in conjunction with the accompanying drawings:

[0020] Embodiment 1:

[0021] As Figures 1 to 3 shown, the positioning device for the metal pipe flaring test specimen of the present utility model includes a base 4. An installation hole runs through between the left and right ends of the base 4. Both ends of the installation hole are connected with bearings 24 through bearing end caps 3. A lead screw 2 is installed between the two bearings 24. One end of the lead screw 2 runs through the bearing end cap 3 and is connected with a rotary drive structure 1. The lead screw 2 is provided with a positive helix 15 and a reverse helix 16. Two strip-shaped sliding holes 17 corresponding to the positive helix 15 and the reverse helix 16 respectively are provided on the top of the base 4. Moving nuts 18 are connected to both the positive helix 15 and the reverse helix 16. Sliding rods extending out of the strip-shaped sliding holes 17 are fixedly connected to both the moving nuts 18. Connecting rods 6 and guide sleeves 11 are fixedly connected to both the sliding rods. Arc-shaped clamping plates 7 are fixedly connected to both the connecting rods 6. Guide shafts 12 are connected to both the guide sleeves 11. The two ends of the guide shaft 12 are respectively connected with a resisting block 14 and a positioning block 10. A spring 13 located between the resisting block 14 and the guide sleeve 11 is sleeved on the guide shaft 12. A dial 20 is provided on the guide shaft 12.

[0022] When in use, as Figure 4 shown, the rotary drive structure 1 drives the lead screw 2 to rotate, thereby driving the two moving nuts 18 to move relatively, and further driving the two arc-shaped clamping plates 7 to move relatively through the sliding rods and the connecting rods 6 to clamp the specimen 19. At this time, the resisting block 14 abuts against the upper end of the specimen 19; as Figure 5 shown, when the top core 21 presses down to flare the specimen 19, the upper port of the specimen 19 expands outward, thereby squeezing the resisting block 14 to move outward, driving the guide shaft 12 to overcome the elastic force of the spring 13 and move under the action of the guide sleeve 11. The moving distance of the guide shaft 12 can be monitored in real time from the dial 20, so as to ensure that the specimen 19 reaches the target flaring size.

[0023] The positioning device for the metal pipe flaring test specimen of the present utility model can clamp and position the specimen 19 through the two arc-shaped clamping plates 7, thereby preventing the specimen 19 from breaking off during the reaming process and ensuring the safety of the reaming test; the flaring size of the specimen 19 can be monitored in real time through the dial 20, so as to ensure successful flaring at one time, avoid multiple measurement operations, and greatly improve the efficiency of the flaring test.

[0024] Embodiment 2:

[0025] As Figures 1 to 5 shown, on the basis of Embodiment 1,

[0026] Further, the rotation driving structure 1 is a knob, which has a simple structure and is convenient to operate;

[0027] Further, when the positioning block 10 is in contact with the guide sleeve 11, the end point of the abutting block 14 is flush with the center of the arc-shaped clamping plate 7 in the vertical plane. When the arc-shaped clamping plate 7 clamps the specimen 19, the abutting block 14 just abuts on the specimen 19. Therefore, during the flaring test, multiplying the reading shown on the dial 20 by two is the flaring size of the specimen 19;

[0028] Further, the mounting hole includes a left nut hole 22, a through hole 23, and a right nut hole 25 arranged in sequence from left to right. The left nut hole 22 corresponds to the reverse screw 16, the right nut hole 25 corresponds to the positive screw 15, and the diameter of the through hole 23 is smaller than the diameters of the left nut hole 22 and the right nut hole 25, which can ensure the thickness of the effective supporting part of the base 4;

[0029] Further, the sliding rod includes an outer rod 5 fixedly connected to the moving nut 18. The outer rod 5 extends out of the strip-shaped sliding hole 17. An inner rod 9 is slidably connected inside the outer rod 5. The upper end of the inner rod 9 extends out of the outer rod 5 and is fixedly connected to the guide sleeve 11. An inner rod locking assembly is connected between the outer rod 5 and the inner rod 9. By adjusting the position of the inner rod 9, the height position of the abutting block 14 can be adjusted, so as to be applicable to the flaring test of specimens 19 with different lengths;

[0030] Further, the inner rod locking assembly includes a set screw 8 threadedly connected to the upper end of the outer rod 5. The set screw 8 penetrates through the side wall of the outer rod 5 and corresponds to the inner rod 9. The inner rod 9 can be locked and loosened by rotating the set screw 8. It has a simple structure and is convenient to operate.

[0031] It should be specifically noted that: in the description of the present invention, the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A positioning device for a metal tube flaring test specimen, characterized in that: It includes a base (4). An installation hole runs through between the left and right ends of the base (4). Both ends of the installation hole are connected with bearings (24) through bearing end caps (3). A lead screw (2) is installed between the two bearings (24). One end of the lead screw (2) runs through the bearing end cap (3) and is connected with a rotary drive structure (1). A positive helix (15) and a reverse helix (16) are provided on the lead screw (2). Two strip-shaped sliding holes (17) corresponding to the positive helix (15) and the reverse helix (16) respectively are provided on the top of the base (4). Moving nuts (18) are connected to both the positive helix (15) and the reverse helix (16). Sliding rods extending out of the strip-shaped sliding holes (17) are fixedly connected to both the moving nuts (18). Connecting rods (6) and guide sleeves (11) are fixedly connected to both the sliding rods. Arc-shaped clamping plates (7) are fixedly connected to both the connecting rods (6). Guide shafts (12) are connected in both the guide sleeves (11). A stop block (14) and a positioning block (10) are respectively connected to both ends of the guide shaft (12). A spring (13) located between the stop block (14) and the guide sleeve (11) is sleeved on the guide shaft (12). A scale disk (20) is provided on the guide shaft (12).

2. The positioning device for the flaring test specimen of the metal tube according to claim 1, characterized in that: The rotary drive structure (1) is a knob.

3. The positioning device for the flaring test specimen of the metal tube according to claim 1, wherein: When the positioning block (10) is in contact with the guide sleeve (11), the end point of the stop block (14) is flush with the center of the arc-shaped clamping plate (7) in the vertical plane.

4. The positioning device for the flaring test specimen of the metal tube according to claim 1, wherein: The installation hole includes a left nut hole (22), a through hole (23), and a right nut hole (25) arranged in sequence from left to right. The left nut hole (22) corresponds to the reverse helix (16), the right nut hole (25) corresponds to the positive helix (15), and the aperture of the through hole (23) is smaller than the apertures of the left nut hole (22) and the right nut hole (25).

5. The positioning device for the metal pipe flaring test specimen according to any one of claims 1 to 4, characterized in that: The sliding rod includes an outer rod (5) fixedly connected to the moving nut (18). The outer rod (5) extends out of the strip-shaped sliding hole (17). An inner rod (9) is slidably connected in the outer rod (5). The upper end of the inner rod (9) extends out of the outer rod (5) and is fixedly connected to the guide sleeve (11). An inner rod locking assembly is connected between the outer rod (5) and the inner rod (9).

6. The positioning device for the flaring test specimen of the metal tube according to claim 5, characterized in that: The inner rod locking assembly includes a setscrew (8) threadedly connected to the upper end of the outer rod (5). The setscrew (8) runs through the side wall of the outer rod (5) and corresponds to the inner rod (9).

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