A clamping tool for polishing a rod piece

Abstract

The utility model provides a kind of clamping tool for bar polishing, it is related to workpiece clamping technical field.The clamping tool includes fixed base, its side wall is equipped with installation passageway, two mounting seats are slidably arranged in passageway, and the spacing of two mounting seats is adjusted by adjusting structure.The top of mounting seat is equipped with stand, and the opposite side wall of stand is equipped with pair of clamps structure, and pair of clamps structure is perpendicular to the moving direction of mounting seat, and the limit structure is equipped on stand, for controlling the axial movement of pair of clamps structure.The quick, non-destructive, centering clamping of different length and diameter rod is realized, and the polishing precision and operation efficiency are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and more specifically, to a clamping fixture for grinding rods. Background Technology

[0002] In machining processes, rod-shaped parts such as shafts, connecting rods, and tubes often require surface grinding and polishing. In such machining, the workpiece clamping method directly affects the machining quality and efficiency. Currently, commonly used clamping methods include traditional bench vises or V-block and pressure plate combination fixtures. These methods have significant shortcomings: First, for rods of different lengths, the clamping position needs to be manually adjusted, a cumbersome process that makes it difficult to ensure that both ends of the rod are on the same horizontal plane after clamping. Imbalanced clamping can easily lead to axial deviation of the workpiece after clamping, affecting the grinding accuracy of the rod's ends. Second, conventional clamping often uses screw tightening, resulting in a small contact area that easily causes indentations or scratches on the workpiece surface, failing to meet the machining needs of precision parts or workpieces with high surface quality requirements. Finally, the entire clamping process requires flipping the rod, and after flipping, the clamping position needs to be adjusted again. This adjustment method relies on the operator's experience, resulting in poor repeatability, low efficiency, and difficulty in adapting to batch production requirements.

[0003] Therefore, there is an urgent need to develop a special clamping fixture that can quickly adapt to different specifications, provide stable and non-destructive support, and significantly improve clamping efficiency and consistency. Utility Model Content

[0004] The purpose of this utility model is to provide a clamping fixture for grinding rods, which addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a clamping fixture for grinding rods, including a fixed base, an installation channel on the side wall of the fixed base, two mounting seats slidingly disposed in the installation channel, an adjustment structure for adjusting the relative distance between the two mounting seats in the installation channel, a column on the top of each mounting seat, and a clamping structure installed on the opposite side wall of each column. The displacement direction of the clamping structure is perpendicular to that of the mounting seat, and a limiting structure is provided on each column to lock the clamping structure to reciprocate along its axial direction.

[0006] In some technical solutions of this utility model, the adjustment structure includes a first shaft rotatably disposed in the installation channel, two sliding sleeves are sleeved on the outer side wall of the first shaft, two external threads with opposite directions are opened on the outer side wall of the first shaft, and internal threads that mesh with the two external threads are respectively opened on the inner side wall of the two sliding sleeves, and the two sliding sleeves are rotatably disposed in two mounting seats.

[0007] In some technical solutions of this utility model, one end of the first shaft extends outward after passing through the mounting base, and the end of the first shaft is provided with a rotating handle.

[0008] In some technical solutions of this utility model, the limiting structure includes a second shaft, a mounting hole is provided at the top of the column, the second shaft passes through the mounting hole, a clamping structure is installed on the side wall of the second shaft, a limiting hole communicating with the mounting hole is provided on the side wall of the column, a limiting post passes through the limiting hole, a plurality of locking holes matching the limiting post are provided on the side wall of the second shaft along its extension direction, and a limiting spring connected to the column is sleeved on the outer side wall of the limiting post.

[0009] In some technical solutions of this utility model, limiting blocks are provided on the opposite side walls of the column, and a first limiting surface is provided on the side wall of each limiting block.

[0010] In some technical solutions of this utility model, a guide groove coaxial with the center of the circle containing the inner arc surface is provided on the side wall of the limiting block, a guide block is slidably provided in the guide groove, and a wheel set is rotatably provided on the side wall of the guide block outside the guide groove.

[0011] In some technical solutions of this utility model, a sliding groove is provided on the side wall of the column along its extension direction, a displacement seat is slidably provided in the sliding groove, and a push rod structure for pushing the displacement seat to move is provided in the sliding groove.

[0012] In some technical solutions of this utility model, a second limiting surface is provided on the side wall of the clamping structure.

[0013] Compared with the prior art, this utility model has at least the following advantages or beneficial effects: By setting an adjustment structure with bidirectional threads, the two mounting seats can move towards or away from each other, and the horizontal height of the two limiting blocks can be adjusted to support the rod, ensuring that the two ends of the rod are on the same horizontal plane. This ensures that the rotation center of the rod is always located on the central axis of the tooling after it is clamped, avoiding deviations caused by manual individual adjustment and improving adjustment speed and positioning accuracy. Through the inner arc surface design on the clamping structure and the limiting blocks, the traditional point contact or line contact is changed to a uniform arc surface contact, increasing the force-bearing area and dispersing the clamping pressure, thereby effectively avoiding damage or scratches to the surface of the rod during grinding. The second shaft of the limiting structure can be adjusted and locked laterally, thereby controlling the vertical displacement of the clamping structure, so that the tooling can adapt to changes in the outer diameter of the rod through the adjustment structure and be adapted to rods of different specifications. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the installation structure of the adjustment structure in this utility model.

[0016] Figure 3 This is a schematic diagram of the installation structure of the clamping structure in this utility model.

[0017] Reference numerals in the attached drawings: 1. Fixed base; 101. Mounting channel; 2. Mounting seat; 3. Adjustment structure; 301. First shaft; 302. Sliding sleeve; 303. External thread; 304. Internal thread; 305. Rotating handle; 4. Column; 401. Mounting hole; 402. Limiting hole; 403. Sliding groove; 5. Clamping structure; 501. Second limiting surface; 6. Limiting structure; 601. Second shaft; 602. Limiting post; 603. Locking hole; 604. Limiting spring; 7. Limiting block; 701. First limiting surface; 702. Guide groove; 703. Guide block; 704. Wheel set; 8. Push rod structure; 9. Displacement seat. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0020] Example This utility model provides a clamping fixture for grinding rods, such as... Figures 1-3As shown, the device includes a fixed base 1, with an installation channel 101 on its side wall. The installation channel 101 extends along the length of the fixed base 1. Two rectangular mounting seats 2 are slidably mounted within the installation channel 101. An adjustment structure 3 is provided within the installation channel 101 to adjust the relative distance between the two mounting seats 2. The operator uses the adjustment structure 3 to make the mounting seats 2 move linearly within the installation channel 101, achieving coarse adjustment of the distance and ensuring synchronous and symmetrical adjustment of the two clamping points, avoiding center offset caused by unilateral adjustment. Each mounting seat 2 has a column 4 on its top. A clamping structure 5 is installed on the opposite side wall of each column 4. The displacement direction of the clamping structure 5 is perpendicular to that of the mounting seat 2. Each column 4 has a limiting structure 6 for locking the clamping structure 5 to reciprocate along its axial direction. The vertical fine adjustment of the clamping structure 5 is controlled by the limiting structure 6, which is used to clamp the rod from both sides and to position the rod. The clamping structure 5 forms a bidirectional clamping force after it is perpendicular to the displacement direction of the mounting base 2, ensuring the stability of the rod after it is fixed.

[0021] The operator places the rod to be ground between two clamping structures 5, and adjusts the relative distance between the two mounting seats 2 using the adjusting structure 3, so that the column 4 initially clamps the workpiece. Then, the vertical position of the two clamping structures 5 is adjusted by the limiting structure 6 to clamp both sides of the rod and prevent the rod from deflecting. Finally, the grinding operation is carried out, so that this structure can be adapted to rod structures of different sizes.

[0022] In some technical solutions of this utility model, the adjusting structure 3 includes a first shaft 301 rotatably disposed within the mounting channel 101. Two sliding sleeves 302 are sleeved on the outer wall of the first shaft 301. Two external threads 303 with opposite directions are formed on the outer wall of the first shaft 301. Internal threads 304 that mesh with the two external threads 303 are formed on the inner walls of the two sliding sleeves 302 respectively. The two sliding sleeves 302 are rotatably disposed within two mounting seats 2. When the operator rotates the first shaft 301, the two reverse threads push the two sliding sleeves 302 to move synchronously towards or away from each other along the shaft, thereby causing the mounting seats 2 to slide within the mounting channel 101. Furthermore, by utilizing the mechanical characteristics of the reverse thread mechanism, the rotational motion is converted into symmetrical linear motion, ensuring that the displacement of the two mounting seats 2 is consistent and that the clamping center is always located on the tooling axis. This is suitable for frequent switching of workpieces of different lengths in batch processing.

[0023] In some technical solutions of this utility model, one end of the first shaft 301 extends outward after passing through the mounting base 2, and a rotating handle 305 is provided at the end of the first shaft 301. The operator can directly rotate the rotating handle 305 at the extended end to drive the first shaft 301 to rotate, and also reduce the operating torque by extending the lever arm to achieve labor-saving operation.

[0024] In some technical solutions of this utility model, the limiting structure 6 includes a second shaft 601. A mounting hole 401 is provided at the top of the column 4, and the second shaft 601 passes through the mounting hole 401, allowing it to move up and down. The clamping structure 5 is mounted on the side wall of the second shaft 601. A limiting hole 402 communicating with the mounting hole 401 is provided on the side wall of the column 4, and a limiting post 602 passes through the limiting hole 402. Several locking holes 603 matching the limiting posts 602 are provided along the extension direction of the side wall of the second shaft 601. A limiting spring 604 connected to the column 4 is sleeved on the outer side wall of the limiting post 602. By extending and retracting the second shaft 601 on the column 4, the horizontal height of the clamping structure 5 can be adjusted, thereby adapting to rods of different sizes. This accommodates diameter changes while ensuring that the clamping structure does not loosen due to vibration during clamping. When the operating button pulls the limiting post 602, the limiting post 602 exits the locking hole 603 and releases the lock on the second shaft 601; after being released, the limiting post 602 is pushed by the spring to insert into the corresponding locking hole 603, thus locking.

[0025] In some technical solutions of this utility model, limiting blocks 7 are provided on the opposite side walls of the column 4, and a first limiting surface 701 is provided on the side wall of each limiting block 7. When the rod is clamped, its outer surface forms surface contact or line contact with the first limiting surface 701 on the limiting block 7. The arc-shaped contact surface increases the force-bearing area, disperses the clamping pressure, and avoids surface damage to the rod caused by point contact. In some technical solutions of this utility model, a second limiting surface 501 is provided on the side wall of the clamping structure 5. When the rod is clamped, it simultaneously contacts the first limiting surface 701 and the second limiting surface 501. The two arc surfaces together form an inclusive contact surface that matches the outer circle of the rod. The arc surface contact design changes point / line contact into surface contact, greatly increasing the contact area, dispersing clamping stress, and avoiding indentation. It also prevents the rod from rotating radially during grinding, and the double arc surface fits to accommodate rods with non-standard cross-sections.

[0026] Preferably, the second limiting surface 501 and the first limiting surface 701 are arc-shaped grooves or V-shaped grooves.

[0027] In some technical solutions of this utility model, a guide groove 702 coaxial with the center of the circle containing the inner arc surface is provided on the side wall of the limiting block 7. A guide block 703 is slidably arranged in the guide groove 702, and a wheel set 704 is rotatably arranged on the side wall outside the guide groove 702. When adjusting the clamping structure 5, the wheel set 704 rolls along the surface of the rod to assist in positioning, converting sliding friction into rolling friction, reducing adjustment resistance, and facilitating the adjustment of the area of ​​the rod exposed to the operator's view for grinding. The guide block 703 is fixed in the guide groove 702 by a screw, and the installation position of the wheel set can be adjusted according to the working conditions to meet different clamping requirements.

[0028] In some technical solutions of this utility model, a groove 403 is provided on the side wall of the column 4 along its extension direction. A displacement seat 9 is slidably disposed in the groove 403, and a push rod structure 8 for pushing the displacement seat 9 to move is provided in the groove 403. The push rod structure 8 pushes the displacement seat 9 to move along the groove 403, thereby driving the limiting block 7 to achieve vertical adjustment, thus changing the clamping area formed by the clamping structure 5 between the two columns 4. The push rod structure 8 and the displacement seat 9 form a driving structure in the groove 403 for adjusting the vertical movement of the limiting block 7.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping fixture for grinding rods, comprising a fixed base (1), wherein an installation channel (101) is provided on the side wall of the fixed base (1), two mounting seats (2) are slidably disposed within the installation channel (101), and an adjustment structure (3) is provided within the installation channel (101) for adjusting the displacement of the two mounting seats (2) along the extension direction of the installation channel, characterized in that, Each of the mounting bases (2) is provided with a column (4) on its top. Each of the columns (4) is provided with a clamping structure (5) on its opposite sidewall. The extension direction of the clamping structure (5) is perpendicular to the displacement direction of the mounting base (2). Each of the columns (4) is provided with a limiting structure (6) for locking the clamping structure (5) to reciprocate along its axial direction. Each of the columns (4) is provided with a limiting block (7) on its opposite sidewall. Each of the columns (4) is provided with a driving structure for adjusting the reciprocating motion of the limiting block (7) in the vertical direction.

2. The clamping fixture for grinding rods according to claim 1, characterized in that, The adjustment structure (3) includes a first shaft (301) rotatably disposed in the installation channel (101). Two sliding sleeves (302) are sleeved on the outer side wall of the first shaft (301). Two external threads (303) with opposite directions are opened on the outer side wall of the first shaft (301). Internal threads (304) that mesh with the two external threads (303) are respectively opened on the inner side wall of the two sliding sleeves (302). The two sliding sleeves (302) are rotatably disposed in the two mounting seats (2).

3. The clamping fixture for grinding rods according to claim 2, characterized in that, One end of the first shaft (301) extends outward after passing through the mounting base (2), and the end of the first shaft (301) is provided with a rotating handle (305).

4. The clamping fixture for grinding rods according to claim 1, characterized in that, The limiting structure (6) includes a second shaft (601), and the top of the column (4) is provided with an installation hole (401). The second shaft (601) passes through the installation hole (401). The clamping structure (5) is installed on the side wall of the second shaft (601). The side wall of the column (4) is provided with a limiting hole (402) communicating with the installation hole (401). A limiting post (602) passes through the limiting hole (402). The side wall of the second shaft (601) is provided with a plurality of locking holes (603) matching the limiting post (602) along its extension direction. A limiting spring (604) connected to the column (4) is sleeved on the outer side wall of the limiting post (602).

5. A clamping fixture for grinding rods according to claim 1 or 4, characterized in that, The sidewalls of the limiting block (7) are provided with a first limiting surface (701).

6. The clamping fixture for grinding rods according to claim 5, characterized in that, The limiting block (7) has a guide groove (702) on its side wall that is coaxial with the center of the circle containing the inner arc surface. A guide block (703) is slidably provided in the guide groove (702). A wheel set (704) is rotatably provided on the side wall outside the guide groove (702) of the guide block (703).

7. The clamping fixture for grinding rods according to claim 6, characterized in that, The driving structure includes a push rod structure (8), and a groove (403) is provided on the side wall of the column (4) along its extension direction. A displacement seat (9) is slidably provided in the groove (403). The push rod structure (8) is installed in the groove (403), and the displacement seat (9) is connected to the telescopic end of the push rod structure (8).

8. The clamping fixture for grinding rods according to claim 4, characterized in that, The clamping structure (5) has a second limiting surface (501) on its side wall.

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