A pipe tensile specimen preparation device

Abstract

The utility model discloses a kind of pipe material tensile sample preparation devices, including dumbbell-shaped sample preparation machine and sample maker, the operating table surface of dumbbell-shaped sample preparation machine is fixed with rear guide strip located in rear of rotating shaft, and sample maker is movably clamped between rear guide strip and guide bearing;Fixed seat is fixed on the operating platform of dumbbell-shaped sample preparation machine, rear guide strip's back surface is horizontally fixed with guide rod that is movably inserted in fixed seat, and support spring between fixed seat and rear guide strip is sleeved on the surface of guide rod.The utility model front guide strip position is fixed, rear guide strip can be horizontally elastic telescopic, both clamping sample maker is convenient transverse movement sample maker and is sent into to rear of polishing sleeve, under the support effect of rear guide strip, auxiliary sample maker makes it adhere on guide bearing, under its clamping effect, manually send in and transverse movement sample maker can be carried out, can ensure that sample maker can only move horizontally and the distance angle between polishing sleeve is invariable, to reach the effect of improving sample consistency.

Description

Technical Field

[0001] This utility model relates to the field of pipe testing technology, specifically a pipe tensile specimen preparation device. Background Technology

[0002] The dumbbell-shaped sample preparation machine and its matching sample preparation device are specialized equipment for preparing standard dumbbell-shaped specimens. They are widely used in the mechanical property testing of plastics, rubber, composite materials, metals, and non-metallic materials. This equipment is also commonly used for tensile strength testing of rubber and plastic pipes. The pipe wall is cut open and the pipe is unfolded to form a dumbbell-shaped sheet of material, wider at both ends and narrower in the middle. The top-view cross-sectional shape of the sample preparation device frame is the standard dumbbell shape for testing. The sample preparation device clamps the sheet of material, and using a contouring processing principle, the sample preparation device frame is fitted to the rolling bearings at the upper and lower ends of the grinding sleeve and moved laterally to grind the clamped sheet of material into a dumbbell-shaped specimen.

[0003] Currently, all operations are performed manually, with the sample preparation device containing the tube blank being moved towards the grinding sleeve. Although it is required that the sample preparation device frame be tightly attached to the outer edge of the guide bearing on the grinding sleeve during processing to ensure that the sample preparation device remains horizontal, the manual feeding method has too many uncertainties. It is entirely controlled by human intervention, making it difficult to guarantee the angle and easily leading to non-standard operation. The consistency of multiple samples produced is poor, making it difficult to ensure the accuracy of tensile test results. Therefore, a tube tensile test sample preparation device that is simple to operate and improves sample consistency is essential. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pipe tensile test specimen preparation device, which solves the problem that the consistency of specimens prepared by manual feeding in existing pipe tensile test specimen preparation devices is difficult to guarantee.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A pipe tensile specimen preparation device includes a dumbbell-shaped specimen preparation machine and a specimen preparation device. The upper end of the rotating shaft of the dumbbell-shaped specimen preparation machine passes through the operating table of the dumbbell-shaped specimen preparation machine and is fixedly fitted with a grinding sleeve. The upper and lower surfaces of the grinding sleeve are fitted with guide bearings. A rear guide bar located behind the rotating shaft is fixed on the operating table of the dumbbell-shaped specimen preparation machine. The specimen preparation device is movably engaged between the rear guide bar and the guide bearing.

[0007] A fixed base is fixed on the operating platform of the dumbbell-shaped prototype machine. A guide rod that is movably inserted into the fixed base is horizontally fixed on the back of the rear guide bar. A support spring located between the fixed base and the rear guide bar is sleeved on the surface of the guide rod.

[0008] The sample preparation device has a pressure plate inside its frame. The pressure plate clamps the tube blank between itself and the bottom of the inner wall of the sample preparation device frame. An adjusting bolt is rotatably connected to the top of the sample preparation device frame. The lower end of the adjusting bolt is threadedly connected to the pressure plate.

[0009] Preferably, the operating platform of the dumbbell-shaped prototype is further fixed with a front guide bar located on one side of the rotating shaft, and the front guide bar is located in front of the rear guide bar.

[0010] Preferably, the front guide bar and the rear guide bar are provided with an opening guide structure at the end opposite to the rotating shaft.

[0011] Preferably, the length of the rear guide strip is not less than twice the lateral width of the sampler.

[0012] Preferably, the rear guide strip has two sets of fixing seats, guide rods and support springs symmetrically arranged on the back side, and a stop ring is fixed to the rear end surface of the guide rod.

[0013] Preferably, there are two adjusting bolts arranged symmetrically on the left and right, and the surface of the adjusting bolts is fixed with a support ring that is movably supported on the top of the inner wall of the sample preparation frame.

[0014] Preferably, the sample preparation device is also rotatably connected to handles that can be flipped up and down on both sides.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention features a rear guide bar and a front guide bar on the back and side of the grinding sleeve of a dumbbell-shaped sample preparation machine. The front guide bar is fixed in position, while the rear guide bar can elastically extend and retract horizontally. Both guide bars clamp the sample preparation device, facilitating its lateral movement and feeding it into the rear of the grinding sleeve. Supported by the rear guide bar, the sample preparation device is aligned with the guide bearing. Under its clamping action, manual feeding and lateral movement of the sample preparation device are achieved. This ensures that the sample preparation device can only move laterally and that the distance and angle between it and the grinding sleeve remain constant, thereby improving the consistency of the sample preparation and solving the problem of inconsistent sample preparation caused by manual feeding in existing pipe tensile test specimen preparation devices. Attached Figure Description

[0017] Figure 1 This is a front view of the present utility model;

[0018] Figure 2 This is a front view of the structure of the corresponding position of the grinding sleeve of this utility model;

[0019] Figure 3 This is a top view of the structure of the corresponding position of the grinding sleeve of this utility model.

[0020] In the diagram: 1. Dumbbell-shaped sample making machine; 2. Sample making device; 201. Pressure plate; 202. Adjusting bolt; 203. Support retaining ring; 204. Handle; 3. Rotating shaft; 4. Grinding sleeve; 5. Guide bearing; 6. Rear guide bar; 7. Fixed seat; 8. Guide rod; 801. Stop retaining ring; 9. Support spring; 10. Tube sheet blank; 11. Front guide bar. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-3 As shown, this utility model provides a technical solution: a pipe tensile test specimen preparation device, including a dumbbell-shaped sample preparation machine 1 and a sample preparation device 2. The upper end of the rotating shaft 3 of the dumbbell-shaped sample preparation machine 1 passes through the operating table of the dumbbell-shaped sample preparation machine 1 and is fixedly fitted with a grinding sleeve 4. The rotating shaft 3 of the dumbbell-shaped sample preparation machine 1 is driven by an internal motor (not shown in the figure). The upper and lower surfaces of the grinding sleeve 4 are fitted with guide bearings 5, which are used to guide the lateral movement of the sample preparation device 2 and are not affected by the lateral movement of the rotating grinding sleeve 4.

[0023] A rear guide bar 6 is fixed on the operating table of the dumbbell-shaped sample making machine 1, located behind the rotating shaft 3. The sample making device 2 is movably engaged between the rear guide bar 6 and the guide bearing 5. A fixed seat 7 is fixed on the operating platform of the dumbbell-shaped sample making machine 1. A guide rod 8 is movably inserted into the fixed seat 7 on the back of the rear guide bar 6. A support spring 9 is sleeved on the surface of the guide rod 8, located between the fixed seat 7 and the rear guide bar 6.

[0024] Two sets of fixing seats 7, guide rods 8 and support springs 9 are symmetrically arranged on the back of the rear guide bar 6, so as to stably support the rear guide bar 6 and allow it to move horizontally back and forth. Under the action of the support springs 9, the sample preparation device 2 is positioned.

[0025] The sample maker 2 has a pressure plate 201 inside its frame. The pressure plate 201 clamps the tube blank 10 between the bottom of the inner wall of the sample maker 2 frame and the bottom of the inner wall of the sample maker 2 frame. The top of the sample maker 2 frame is rotatably connected to an adjusting bolt 202. There are two adjusting bolts 202, which are symmetrically arranged on the left and right. The surface of the adjusting bolt 202 is fixed with a support retaining ring 203 that is movably supported on the top of the inner wall of the sample maker 2 frame. The lower end of the adjusting bolt 202 is threadedly connected to the pressure plate 201. The two sides of the sample maker 2 are also rotatably connected to handles 204 that can be flipped up and down.

[0026] On the operating platform of the dumbbell-shaped sample maker 1, there is also a front guide bar 11 fixed on one side of the rotating shaft 3. The front guide bar 11 and the rear guide bar 6 are provided with an opening guide structure at the ends opposite to the rotating shaft 3. The front guide bar 11 is located in front of the rear guide bar 6. The length of the rear guide bar 6 is not less than twice the lateral width of the sample maker 2. The rear end surface of the guide rod 8 is fixed with a stop ring 801. The front guide bar 11 only plays a role in the stage when the sample maker 2 is fed into the rear of the grinding sleeve 4. During the grinding process, it relies on the rear guide bar 6 for guidance and clamping with the guide bearing 5 for positioning.

[0027] Working principle:

[0028] Cut and unfold the pipe to form dumbbell-shaped pipe blanks 10. Place them between the pressure plate 201 and the bottom of the inner wall of the sample maker 2 frame. Support the pressure plate 201 downwards with adjusting bolts 202 to clamp the pipe blanks 10. Hold the handle 204 of the sample maker 2 and move the sample maker 2 laterally from the opening side of the front guide bar 11 and the rear guide bar 6. Under the guidance of the front guide bar 11 and the rear guide bar 6, move the sample maker 2 between the grinding sleeve 4 and the rear guide bar 6. Under the guidance, support and auxiliary positioning of the rear guide bar 6, ensure that the sample maker 2 remains horizontal. With manual feeding and lateral movement, ensure that the distance and angle between the sample maker 2 and the grinding sleeve 4 remain unchanged for grinding and sample preparation, thereby improving the consistency of the pipe sample.

Claims

1. A pipe tensile specimen preparation device, comprising a dumbbell-shaped specimen preparation machine (1) and a specimen preparation device (2), wherein the upper end of the rotating shaft (3) of the dumbbell-shaped specimen preparation machine (1) passes through the operating table of the dumbbell-shaped specimen preparation machine (1) and is fixedly fitted with a grinding sleeve (4), characterized in that: The upper and lower surfaces of the grinding sleeve (4) are fitted with guide bearings (5), and the operating table of the dumbbell-shaped sample making machine (1) is fixed with a rear guide strip (6) located behind the rotating shaft (3). The rear guide strip (6) and the guide bearing (5) are movably connected to the sample making device (2). The dumbbell-shaped prototype (1) has a fixed base (7) on its operating platform. The back of the rear guide bar (6) is horizontally fixed with a guide rod (8) that is movably inserted into the fixed base (7). The surface of the guide rod (8) is fitted with a support spring (9) located between the fixed base (7) and the rear guide bar (6). The sample maker (2) has a pressure plate (201) inside its frame. The pressure plate (201) clamps the tube sheet blank (10) between the bottom of the inner wall of the sample maker (2) frame and the top of the sample maker (2) frame. An adjusting bolt (202) is rotatably connected to the top of the sample maker (2) frame. The lower end of the adjusting bolt (202) is threadedly connected to the pressure plate (201).

2. The tubular tensile specimen preparation apparatus according to claim 1, characterized in that: The dumbbell-shaped prototype (1) also has a front guide bar (11) fixed on one side of the rotating shaft (3) on its operating platform. The front guide bar (11) is located in front of the rear guide bar (6).

3. The tubular tensile specimen preparation apparatus according to claim 2, characterized in that: The front guide bar (11) and the rear guide bar (6) are provided with an opening guide structure at the end opposite to the rotating shaft (3).

4. The tubular tensile specimen preparation apparatus according to claim 1, characterized in that: The length of the rear guide bar (6) is not less than twice the lateral width of the sampler (2).

5. The tubular tensile specimen preparation apparatus according to claim 1, characterized in that: The rear guide bar (6) is symmetrically provided with two sets of fixing seats (7), guide rods (8) and support springs (9) on the back side. The rear end surface of the guide rod (8) is fixed with a stop ring (801).

6. The tubular tensile specimen preparation apparatus according to claim 1, characterized in that: There are two adjusting bolts (202) arranged symmetrically on the left and right. The surface of the adjusting bolts (202) is fixed with a support ring (203) that is movably supported on the top of the inner wall of the sample preparation device (2) frame.

7. The tubular tensile specimen preparation apparatus according to claim 1, characterized in that: The sample preparation device (2) is also rotatably connected to handles (204) that can be flipped up and down on both sides.

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