A clamp for 45° angle cutting sample of rail head of steel rail

Abstract

The utility model discloses a clamp for 45 DEG angle cutting sample of rail head of steel rail, including base, the top of base is fixed with L type cushion block through welding, one end of L type cushion block is fixed with rectangular pipe through welding, the utility model discloses the assembling hole, inner plate and reset spring of design, slide the inner plate to the assembling hole, the top rod is drawn and is limited, guarantee top rod drawing and will not from the rectangular pipe inside separation, avoid the inconvenient operation of again hole insertion when traditional top rod uses, when stopping clamping the rail head, the band sawing machine is stopped to the top rod extrusion to the hydraulic clamp, and reset spring that is in the compression state recovers deformation and exerts elastic force at this moment, and the top rod is pushed and is reset quickly automatically, need not manually drawing top rod and stop clamping the rail head, make the utility model discloses operation more convenient and fast.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology, specifically relating to a clamp for cutting samples at a 45° angle from the rail head. Background Technology

[0002] The fixture for cutting samples at a 45° angle from rail heads can firmly clamp five sample blanks at once and complete the processing, improving work efficiency. It can be used directly on a band saw, significantly improving the safety, processing accuracy, and work efficiency of the processed samples. It achieves precise cutting of samples at a 45° angle from rail heads, with a smooth cut surface and consistent sampling positions, ensuring accurate and comparable test data. Work efficiency is increased by more than five times, saving working time. The top rod clamps the sample along the rectangular sleeve, ensuring stable and secure sample clamping and operational safety. This invention features a simple design structure, ingenious concept, low manufacturing difficulty, low manufacturing cost, strong scalability, convenient use, high sample processing accuracy, and high work efficiency.

[0003] The existing fixture is used by placing it in the split fixture of a horizontal band saw, adjusting the band saw blade's feed position, lowering the band saw blade and aligning it with the short side of the L-shaped pad, arranging 1-5 rail sample blanks neatly, placing the rail head on the fixture pad, checking that the aforementioned three positions are in contact, inserting the sample ejector piston, starting the machine and clamping the fixture with the split hydraulic clamp of the band saw, and starting to saw the sample. However, it has the following defects:

[0004] (1) Since the top rod is directly pulled out and installed in the rectangular tube, the top rod will fall out of the rectangular tube during the pulling operation. When using it, it is necessary to manually re-align the hole and then insert it. At the same time, it will be affected by frictional resistance during insertion, making it inconvenient to insert the top rod. After stopping the clamping of the rail head sample blank, it is also necessary to manually retract the top rod to squeeze it, making the sampling operation inconvenient.

[0005] (2) When the clamp pushes the top rod to clamp the rail head through the split hydraulic clamp of the band saw, the top rod is prone to impacting the rail head and causing deformation and damage to the rail head. To address this, we propose a clamp for cutting samples at a 45° angle from the rail head. Utility Model Content

[0006] The purpose of this utility model is to provide a clamp for cutting samples at a 45° angle from the rail head, so as to solve the problems mentioned in the background art, such as the inconvenience of using the clamp and the easy impact force of the top rod on the rail head, which causes damage.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fixture for cutting samples at a 45° angle from the rail head, comprising a base, an L-shaped pad fixed to the top of the base by welding, a rectangular tube fixed to one end of the L-shaped pad by welding, a top rod slidably inserted inside the rectangular tube, an assembly hole being formed on the surface of the top rod, an inner plate slidably connected inside the assembly hole, the inner plate being fixed to the inner wall of the rectangular tube by welding, a return spring being provided on one side of the inner plate, and the return spring being located inside the assembly hole.

[0008] Preferably, the inner plate has a sliding hole on its surface, and an inner rod passes through the sliding hole and the interior of the return spring. The inner rod is fixed to the inner wall of the assembly hole by welding.

[0009] Preferably, the rectangular tube has spherical grooves on its inner walls around its perimeter, and ball bearings are embedded in the spherical grooves.

[0010] Preferably, one end of the top rod is fixed with a buffer assembly by embedding, and the buffer end of the buffer assembly is fixed with a movable top plate by welding.

[0011] Preferably, the buffer assembly consists of a buffer column, a buffer seat, and a buffer spring. The buffer seat is sleeved on the outer wall of the end of the buffer column, and the buffer spring is located inside the buffer seat, with one end of the buffer spring in contact and pressing against the end surface of the buffer column.

[0012] Preferably, the longitudinal section of both the buffer column and the buffer seat is circular, and the cross section of the buffer column is T-shaped.

[0013] Preferably, the longitudinal section of the movable top plate is rectangular, and the outer diameter of the movable top plate is the same as the outer diameter of the top rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By designing the assembly hole, inner plate and return spring, the inner plate is slidably set into the assembly hole to limit the pull of the top rod, ensuring that the top rod will not come out of the rectangular tube when it is pulled out. This avoids the inconvenience of having to re-insert the top rod into the hole when using the traditional top rod. When the rail head is stopped, the hydraulic clamp of the band saw stops squeezing the top rod. At this time, the return spring, which is in a compressed state, restores its deformation and applies elastic force to push the top rod to quickly move back to reset. There is no need to manually pull the top rod to stop clamping the rail head, making the operation of this utility model more convenient and faster. Through the design of the ball bearings, the ball bearings are rolled and embedded in the rectangular tube, which plays a lubricating role, so that the reciprocating pull of the top rod in the rectangular tube will not be affected by frictional resistance, making it more convenient and faster to use.

[0016] (2) Through the designed buffer assembly, when the push rod moves towards the rail head blank under the push of the hydraulic clamp of the band saw, the movable top plate first contacts the blank and is subjected to the reaction force. At this time, the movable top plate transmits the force to the buffer spring through the buffer seat. The spring is compressed by the large end of the buffer column, producing elastic deformation. The compression process of the spring will absorb part of the clamping impact force, avoiding the rigid thrust of the push rod from acting directly on the blank, and preventing the rail head blank from being squeezed and deformed or damaged on the surface. The buffer column is designed with a T-shaped cross section, so that while the buffer column slides in the buffer seat, the large end of the buffer column can be stuck in the buffer seat to limit it, preventing the buffer column from detaching from the buffer seat. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a three-dimensional view of the rectangular tube, inner plate, and inner rod assembled according to this utility model.

[0019] Figure 3 This is a perspective view of the assembly of the top rod, buffer assembly, and movable top plate of this utility model;

[0020] Figure 4 This is an assembly cross-sectional view of the top rod, rectangular tube, buffer assembly, and movable top plate of this utility model;

[0021] In the diagram: 1. Base; 2. Assembly hole; 3. Inner plate; 4. Rectangular tube; 5. Top rod; 6. Movable top plate; 7. L-shaped pad; 8. Ball bearing; 9. Return spring; 10. Inner rod; 11. Sliding hole; 12. Buffer assembly; 13. Buffer column; 14. Buffer seat; 15. Buffer spring. Detailed Implementation

[0022] 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.

[0023] Example

[0024] Please see Figures 1 to 4This utility model provides a technical solution: a fixture for cutting samples at a 45° angle from the rail head, comprising a base 1, an L-shaped pad 7 fixed to the top of the base 1 by welding, a rectangular tube 4 fixed to one end of the L-shaped pad 7 by welding, a top rod 5 slidably inserted inside the rectangular tube 4, an assembly hole 2 formed on the surface of the top rod 5, an inner plate 3 slidably connected inside the assembly hole 2, the inner plate 3 being fixed to the inner wall of the rectangular tube 4 by welding, a return spring 9 provided on one side of the inner plate 3, and the return spring 9 being located inside the assembly hole 2, allowing for... Through the designed assembly hole 2, inner plate 3, and return spring 9, the inner plate 3 is slidably set into the assembly hole 2, limiting the pull of the top rod 5 and ensuring that the top rod 5 will not detach from the rectangular tube 4 when pulled out. This avoids the inconvenience of having to re-insert the top rod into the hole when using a traditional top rod. When the rail head is stopped from being clamped, the split hydraulic clamp of the band saw stops squeezing the top rod 5. At this time, the return spring 9, which is in a compressed state, restores its deformation and applies elastic force, pushing the top rod 5 to quickly move back to its original position. There is no need to manually pull out the top rod to stop clamping the rail head, making the operation of this utility model more convenient and faster.

[0025] In this embodiment, preferably, the surface of the inner plate 3 is provided with a sliding hole 11, and the inner rod 10 passes through the sliding hole 11 and the interior of the return spring 9. Through the designed inner rod 10 and sliding hole 11, the return spring 9 is supported and limited, so as to prevent the return spring 9 from detaching from the assembly hole 2 when it is squeezed. The inner rod 10 is fixed to the inner wall of the assembly hole 2 by welding.

[0026] In this embodiment, preferably, the inner walls of the rectangular tube 4 are provided with spherical grooves, and ball bearings 8 are embedded in the spherical grooves. Through the design of the ball bearings 8, the ball bearings 8 are rolled and embedded in the rectangular tube 4, which plays a lubricating role, so that the push rod 5 can move back and forth in the rectangular tube 4 without being affected by frictional resistance, making it more convenient and quick to use.

[0027] In this embodiment, preferably, one end of the push rod 5 is fixed with a buffer assembly 12 by embedding. The buffer end of the buffer assembly 12 is fixed with a movable top plate 6 by welding. The buffer assembly 12 consists of a buffer column 13, a buffer seat 14, and a buffer spring 15. The buffer seat 14 is sleeved on the outer wall of the end of the buffer column 13. The buffer spring 15 is located inside the buffer seat 14, and one end of the buffer spring 15 is in contact with and pressed against the end surface of the buffer column 13. Through the designed buffer assembly 12, when the push rod 5 moves towards the rail head blank under the push of the hydraulic clamp of the band saw, the movable top plate 6 first contacts the blank and is subjected to a reaction force. At this time, the movable top plate transmits the force to the buffer spring 15 through the buffer seat 14. The spring is compressed by the large end of the buffer column 13 and produces elastic deformation. The compression process of the spring will absorb part of the clamping impact force, avoiding the rigid thrust of the push rod 5 from acting directly on the blank, and preventing the rail head blank from being squeezed and deformed or damaged on the surface.

[0028] In this embodiment, preferably, the longitudinal section of both the buffer column 13 and the buffer seat 14 is circular, and the cross section of the buffer column 13 is T-shaped. By designing the cross section of the buffer column 13 to be T-shaped, the large end of the buffer column 13 can be locked and limited within the buffer seat 14 while sliding within the buffer seat 14, thus preventing the buffer column 13 from detaching from the buffer seat 14. The longitudinal section of the movable top plate 6 is rectangular, and the outer diameter of the movable top plate 6 is the same as the outer diameter of the top rod 5.

[0029] The working principle and usage process of this utility model are as follows: In use, the fixture is placed in the split fixture of the horizontal band saw, the saw blade is adjusted to the cutting position, the band saw blade is lowered and aligned with the short side of the L-shaped pad 7, 1-5 rail sample blanks are arranged neatly, the rail head is placed on the L-shaped pad 7 of the fixture, when placing the rail head sample blank, the end of the rail head abuts against the thicker vertical surface of the L-shaped pad 7, the lower arc of the rail head presses against the bottom surface of the L-shaped pad 7, and the connection between the rail head and the rail web is hung on the short side of the L-shaped pad 7. The sample blank is cut at a 45° angle. Check whether the above three positions are in contact, start the machine tool and use the split hydraulic fixture of the band saw to clamp the fixture, and start sawing the sample.

[0030] The push rod 5 of this utility model is matched with the inner plate 3 and the assembly hole 2. It will not disengage when pulled out and limited in the inner plate 3, so there is no need to manually insert it into the rectangular tube 4 again, making the operation convenient and quick. When the horizontal band saw is started, the hydraulic driving force pushes the push rod 5 to slide along the rectangular tube 4 towards the rail head blank. The friction is reduced by the ball bearing 8. The push rod 5 drives the movable top plate 6 to squeeze the blank through the buffer assembly 12 until the blank is tightly clamped. When the push rod 5 moves towards the rail head blank under the push of the band saw hydraulic clamp, the movable top plate 6 first contacts the blank and is subjected to the reaction force. At this time, the movable top plate transmits the force to the buffer spring 15 through the buffer seat 14. The spring is compressed by the large end of the buffer column 13 and produces elastic deformation. The compression process of the spring will absorb part of the clamping impact force, avoiding the rigid thrust of the push rod 5 from acting directly on the blank, and preventing the rail head blank from being squeezed and deformed or damaged on the surface.

[0031] The band saw blade is aligned with the preset sawing position (corresponding to a 45° included angle trajectory) of the short side of the L-shaped pad 7, and sawing is started. Because the sample blank is stably clamped and accurately positioned, the saw cut surface is flat and the sampling position meets the standard. After sawing is completed, the hydraulic clamp of the band saw is released, the top rod 5 loses external force, the compressed return spring 9 restores its deformation, pushes the top rod 5 to slide in the opposite direction along the rectangular tube 4, the movable top plate 6 is disengaged from the rail head sample blank, the top rod 5 automatically resets, and after the sample blank is removed, the next batch of operations can be carried out.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamp for cutting samples at a 45° angle from the rail head, comprising a base (1), wherein an L-shaped pad (7) is welded to the top of the base (1), and a rectangular tube (4) is welded to one end of the L-shaped pad (7), wherein a top rod (5) is slidably inserted into the interior of the rectangular tube (4), characterized in that: The top rod (5) has an assembly hole (2) on its surface. An inner plate (3) is slidably connected inside the assembly hole (2). The inner plate (3) is fixed to the inner wall of the rectangular tube (4) by welding. A return spring (9) is provided on one side of the inner plate (3), and the return spring (9) is located inside the assembly hole (2).

2. The fixture for cutting samples at a 45° angle from the rail head according to claim 1, characterized in that: The inner plate (3) has a sliding hole (11) on its surface. The sliding hole (11) and the return spring (9) are connected by an inner rod (10). The inner rod (10) is fixed to the inner wall of the assembly hole (2) by welding.

3. The fixture for cutting samples at a 45° angle from the rail head according to claim 1, characterized in that: The rectangular tube (4) has spherical grooves on its inner walls, and ball bearings (8) are embedded in the spherical grooves.

4. The fixture for cutting samples at a 45° angle from the rail head according to claim 1, characterized in that: One end of the top rod (5) is fixed with a buffer assembly (12) by embedding, and the buffer end of the buffer assembly (12) is fixed with a movable top plate (6) by welding.

5. A fixture for cutting samples at a 45° angle from the rail head according to claim 4, characterized in that: The buffer assembly (12) consists of a buffer column (13), a buffer seat (14), and a buffer spring (15). The buffer seat (14) is sleeved on the outer wall of the end of the buffer column (13), and the buffer spring (15) is located inside the buffer seat (14), with one end of the buffer spring (15) contacting and pressing against the end surface of the buffer column (13).

6. A fixture for cutting samples at a 45° angle from the rail head according to claim 5, characterized in that: The longitudinal section of the buffer column (13) and the buffer seat (14) are both circular, and the cross section of the buffer column (13) is T-shaped.

7. A fixture for cutting samples at a 45° angle from the rail head according to claim 4, characterized in that: The longitudinal section of the movable top plate (6) is rectangular, and the outer diameter of the movable top plate (6) is the same as the outer diameter of the top rod (5).

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