A clamping and positioning fixture for machining a round rod workpiece

Abstract

The utility model discloses a kind of clamping positioning fixtures for round bar workpiece processing, including base, a group of detachable upper pressing block being arranged on base, first clamping groove with opening being set up on base upwards, second clamping groove being set up on the upper pressing block and being adapted to first clamping groove, the groove bottom of first clamping groove is centrally arranged in width direction with the anti-rotation vertical column being adapted to the round hole perpendicular to round bar axis on round bar, further include first locking assembly for locking upper pressing block on base, the utility model can guarantee stable clamping round bar and effectively prevent round bar rotation, can be widely applied in round bar processing technical field.

Description

Technical Field

[0001] This utility model relates to the field of round rod processing technology, specifically to a clamping and positioning fixture for processing round rod workpieces. Background Technology

[0002] In the machining of round rods, processes such as drilling, cutting, and welding require stable clamping and precise positioning to ensure machining accuracy and product quality. Existing round rod clamping fixtures are mostly two-plate structures, which present the following problems during use: First, the fixture is prone to tilting when clamping the round rod, leading to unstable clamping and affecting machining accuracy; second, the round rod is prone to rotation within the fixture, causing deviations in the machining position and reducing machining quality and efficiency. Therefore, it is necessary to design a fixture that can stably clamp the round rod and effectively prevent its rotation. Utility Model Content

[0003] The purpose of this utility model is to provide a clamping and positioning fixture for machining round rod workpieces, so as to solve the related problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: including a base, a set of detachable upper pressure blocks disposed on the base, the base being provided with a first slot with an upward opening, the upper pressure blocks being provided with a second slot adapted to the first slot, the bottom of the first slot being provided with an anti-rotation column adapted to a circular hole perpendicular to the axis of the circular rod at the center along the width direction, and also including a first bolt for locking the upper pressure blocks onto the base.

[0005] Preferably, both the first card slot and the second card slot are V-shaped grooves.

[0006] To prevent the upper pressure block from tilting, a guide component is provided on the base to prevent the upper pressure block from tilting.

[0007] Furthermore, the guiding assembly includes a set of guide posts disposed on the base, and the upper pressure block is provided with guide holes adapted to the guide posts.

[0008] To facilitate the disassembly and replacement of the anti-rotation column, the bottom of the anti-rotation column is provided with a fixing seat for fixing the anti-rotation column to the base. The base is provided with an assembly countersunk hole adapted to the fixing seat, and also includes a second bolt for locking the fixing seat in the assembly countersunk hole.

[0009] To ensure accurate positioning, the assembly countersunk hole is equipped with a positioning component to prevent the anti-rotation column from shifting.

[0010] Furthermore, the positioning component includes a set of positioning posts disposed within the assembly countersunk hole, and the fixing seat is provided with positioning holes adapted to the positioning posts.

[0011] To ensure the round rod does not rotate, a conical countersunk hole is provided at the top of the anti-rotation column. A third bolt through hole is provided at the lower end of the conical countersunk hole on the anti-rotation column. A third bolt is installed in the third bolt through hole. A third threaded hole adapted to the third bolt is provided at the bottom of the assembly countersunk hole. The outer wall of the head of the third bolt is a conical part adapted to the inner wall of the conical countersunk hole. A set of expansion gaps is provided on the anti-rotation column.

[0012] Preferably, the upper pressure block is provided with a handle.

[0013] The beneficial effects of this utility model are as follows: This utility model clamps the round rod through the cooperation of the first and second slots. Utilizing the interaction of four inclined surfaces, it can apply uniform clamping force to the round rod from multiple angles. Compared to the traditional single-plane clamping method, this allows the round rod to maintain high stability during processing and prevents skewing. The anti-rotation column's tight fit with the round hole on the round rod effectively prevents rotation, greatly ensuring the accuracy and quality of the round rod processing. Furthermore, the V-groove design of the first and second slots is suitable for round rods of different diameters, making it widely applicable. The guide post's cooperation with the guide hole ensures that the upper pressure block maintains a straight up-and-down movement during its vertical motion, preventing skewing and further improving the stability of the round rod clamping. The anti-rotation column, through the cooperation of the fixed base, the second locking component, and the positioning component, enables quick disassembly and replacement of anti-rotation columns of different sizes according to the size of the round hole on the round rod. At the same time, the positioning component can ensure that the anti-rotation column is precisely centered along the width direction of the base, so that the anti-rotation column and the round hole on the round rod can be precisely matched, ensuring that the round rod is fixed in the center along the width direction in the first and second slots during each processing.

[0014] In addition, the anti-rotation column is designed with an expansion structure, which can effectively eliminate the gap between the round hole on the round rod and the anti-rotation column caused by processing errors. By squeezing the inner wall of the round hole, the round hole is firmly locked, ensuring that the round rod will not rotate back and forth during processing, which greatly guarantees the accuracy and stability of the round rod processing. Attached Figure Description

[0015] Figure 1 This is a perspective view of Embodiment 1 of this utility model.

[0016] Figure 2 This is a top view of the base in this utility model.

[0017] Figure 3 This is a perspective view of the upper pressure block in this utility model.

[0018] Figure 4 This is a perspective view of the anti-rotation column and fixing base in Embodiment 1 of this utility model.

[0019] Figure 5 This is an assembly perspective view of the anti-rotation column and fixing base in Embodiment 1 of this utility model.

[0020] Figure 6 This is a top view of the round rod and round hole in this utility model.

[0021] Figure 7 This is a perspective view of Embodiment 2 of the present invention.

[0022] Figure 8 This is a cross-sectional view of Embodiment 2 of the present invention.

[0023] Figure 9 This is a top view of Embodiment 2 of the present invention.

[0024] Figure 10 This is an exploded view of the anti-rotation column and the third bolt in Embodiment 2 of this utility model. Detailed Implementation

[0025] Example 1, as Figure 1-6 As shown, a clamping and positioning fixture for machining round rod workpieces includes a base 1 and a set of detachable upper pressure blocks 2 disposed on the base 1. The base 1 is provided with a first slot 11 opening upwards, and the upper pressure blocks 2 are provided with a second slot 21 opening downwards and adapted to the first slot 11. Both the first slot 11 and the second slot 21 are V-shaped grooves. A counter-rotation post 3, adapted to a circular hole 20 perpendicular to the axis of the round rod, is centrally located at the bottom of the first slot 11 along its width direction. The fixture also includes a first bolt 4 for locking the upper pressure blocks 2 onto the base 1. The first bolt 4 locks the upper pressure blocks 2 onto the base 1, and the first slot 11 and the second slot 21 cooperate to firmly clamp the round rod. Simultaneously, by passing the circular hole 20 perpendicular to the axis of the round rod through the counter-rotation post 3, the round rod is prevented from rotating. Furthermore, the first slot 11 and the second slot 21 are designed as V-shaped grooves, suitable for round rods of different diameters.

[0026] Specifically, to lock the upper pressure block 2 onto the base 1, the upper pressure block 2 is provided with a first bolt through hole 22 adapted to the first bolt 4, and the base 1 is provided with a first threaded hole 12 adapted to the first bolt 4. By tightening the first bolt 4, the upper pressure block 2 is firmly fixed onto the base 1, thereby stably clamping the round rod between the first slot 11 and the second slot 21. To prevent the upper pressure block 2 from tilting due to uneven force at both ends, the base 1 is provided with a guide assembly 5 to prevent the upper pressure block 2 from tilting. The guide assembly 5 includes a set of guide posts 51 provided on the base 1, and the upper pressure block 2 is provided with guide holes 23 adapted to the guide posts 51. Through the cooperation of the guide posts 51 and the guide holes 23, it is ensured that the upper pressure block 2 can only move up and down in a straight line relative to the base 1, thereby ensuring that it will not tilt. To facilitate the removal and placement of the upper pressure block 2, a handle 24 is provided on the upper pressure block 2.

[0027] To facilitate the disassembly and replacement of the anti-rotation column 3, the bottom of the anti-rotation column 3 is provided with a fixing seat 31 for fixing the anti-rotation column 3 to the base 1. The base 1 is provided with an assembly countersunk hole 13 that matches the fixing seat 31, and also includes a second bolt 32 for locking the fixing seat 31 in the assembly countersunk hole 13. The fixing seat 31 is provided with a second bolt through hole 311 that matches the second bolt 32. The bottom of the assembly countersunk hole 13 is provided with a second threaded hole 131 that matches the second bolt 32. By tightening the second bolt 32, the anti-rotation column 3 can be fixed to the base 1. The anti-rotation column 3 can be removed by removing the second bolt 32, which makes it convenient to replace different models of anti-rotation columns 3 according to the size of the round hole 20 on the round rod. To ensure that the anti-rotation column 3 is centered on the base 1 along the width direction of the base 1, a positioning component is provided on the mounting countersunk hole 13 to prevent the anti-rotation column 3 from shifting. The positioning component includes a set of positioning pins 6 fixedly installed at the bottom of the mounting countersunk hole 13. A set of positioning pin mounting holes 133 is provided at the bottom of the mounting countersunk hole 13. The positioning pins 6 are fixed in the positioning pin mounting holes 133. The fixing base 31 is provided with positioning holes 312 that are adapted to the positioning pins 6. The positioning pins 6 and the positioning holes 312 cooperate to ensure accurate positioning.

[0028] The working principle of this embodiment is as follows: First, the round rod is placed horizontally in the first slot 11, and the round rod is passed through the round hole 20 onto the anti-rotation column 3. Then, the upper pressure block 2 is passed through the guide hole 23 onto the guide post 51. Next, the first bolt 4 is tightened, and the round rod is firmly clamped by the first slot 11 and the second slot 21. After processing is completed, the first bolt 4 is loosened, the upper pressure block 2 is removed by the handle 24, and then the round rod is removed. When the anti-rotation column 3 needs to be replaced, the second bolt 32 is loosened to remove the anti-rotation column 3. During installation, the positioning hole 312 is first passed through the positioning post 6, and then the second bolt 32 is tightened.

[0029] Example 2, as Figure 7-10 As shown, in actual production, due to processing errors, there may be a gap between the round hole 20 on the round rod and the anti-rotation column 3. Therefore, when the round rod passes through the round hole 20 and is processed on the anti-rotation column 3, it may rotate back and forth. To eliminate the impact of the gap, the anti-rotation column 3 is designed as an expansion structure. Specifically, the anti-rotation column 3 has a conical countersunk hole 33 at its top. A third bolt through-hole 34 is located at the lower end of the conical countersunk hole 33 on the anti-rotation column 3. A third bolt 35 is installed inside the third bolt through-hole 34. A third threaded hole 132, adapted to the third bolt 35, is located at the bottom of the mounting countersunk hole 13. The head of the third bolt 35 is a conical part 351 adapted to the inner wall of the conical countersunk hole 33. Four expansion slots 36 are arranged in a ring around the axis on the anti-rotation column 3, dividing the anti-rotation column 3 into four equal parts. In use, first, the round rod is passed through the round hole 20 and fitted onto the anti-rotation column 3. Then, the third bolt 35 is tightened. The tapered part 351 on the head of the third bolt 35 presses against the inner wall of the tapered countersunk hole 33, thereby causing the four equally divided anti-rotation column 3 to expand evenly in all directions and press against the inner wall of the round hole 20, thus locking the round hole 20 and ensuring that the round rod will not rotate back and forth during processing. Other structures are the same as in Embodiment 1.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A clamping and positioning fixture for machining round rod workpieces, characterized in that: The device includes a base (1), a set of detachable upper pressure blocks (2) disposed on the base (1), a first slot (11) disposed on the base (1), a second slot (21) disposed on the upper pressure block (2) adapted to the first slot (11), an anti-rotation column (3) disposed at the bottom of the first slot (11) along the width direction and adapted to a round hole (20) on the round rod workpiece perpendicular to the axis of the round rod, and a first bolt (4) for locking the upper pressure block (2) on the base (1).

2. The clamping and positioning fixture for machining round rod workpieces according to claim 1, characterized in that: Both the first card slot (11) and the second card slot (21) are V-shaped slots.

3. The clamping and positioning fixture for machining round rod workpieces according to claim 1, characterized in that: The base (1) is provided with a guide component (5) to prevent the upper pressure block (2) from tilting.

4. The clamping and positioning fixture for machining round rod workpieces according to claim 3, characterized in that: The guide assembly (5) includes a set of guide posts (51) disposed on the base (1), and the upper pressure block (2) is provided with guide holes (23) adapted to the guide posts (51).

5. The clamping and positioning fixture for machining round rod workpieces according to claim 1, characterized in that: The bottom of the anti-rotation column (3) is provided with a fixing seat (31) for fixing the anti-rotation column (3) on the base (1). The base (1) is provided with an assembly countersunk hole (13) that is compatible with the fixing seat (31). The fixing seat (31) is provided with a second bolt (32) for locking the fixing seat (31) in the assembly countersunk hole (13).

6. The clamping and positioning fixture for machining round rod workpieces according to claim 5, characterized in that: The assembly countersunk hole (13) is provided with a positioning component to prevent the anti-rotation column (3) from shifting.

7. The clamping and positioning fixture for machining round rod workpieces according to claim 6, characterized in that: The positioning assembly includes a set of positioning pins (6) disposed in the mounting countersunk hole (13), and the fixing seat (31) is provided with positioning holes (312) adapted to the positioning pins (6).

8. The clamping and positioning fixture for machining round rod workpieces according to claim 5, characterized in that: The anti-rotation column (3) has a conical countersunk hole (33) at the top. A third bolt through hole (34) is provided at the lower end of the conical countersunk hole (33) on the anti-rotation column (3). A third bolt (35) is provided in the third bolt through hole (34). A third threaded hole (132) adapted to the third bolt (35) is provided at the bottom of the assembly countersunk hole (13). The outer wall of the head of the third bolt (35) is a conical part (351) adapted to the inner wall of the conical countersunk hole (33). A set of expansion gaps (36) is provided on the anti-rotation column (3).

9. The clamping and positioning fixture for machining round rod workpieces according to claim 1, characterized in that: The upper pressure block (2) is provided with a handle (24).

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