Clamp for lathe

Abstract

The utility model relates to the technical field of workpiece processing, and provides a clamp for a lathe, which is used for fixing a workpiece on a lathe spindle along the axial direction of the workpiece, one side of the workpiece is provided with a through hole which is aligned with a central shaft of the workpiece, the clamp comprises a fixed plate, a fixed plate and a fixed plate, the fixed plate is fixedly arranged on the lathe spindle, and the fixed plate is provided with a supporting seat, an adjusting component and a fixed component; a positioning pin is arranged on the supporting seat, a workpiece is placed on the supporting seat, and the positioning pin is inserted into the through hole; the fixing assembly is used for fixing a workpiece to the supporting base, the adjusting assembly is provided with a first adjusting rod, a second adjusting rod, a first supporting block and a second supporting block, and the first adjusting rod and the second adjusting rod are in threaded connection to the first supporting block and the second supporting block correspondingly and are both connected with the supporting base; by rotating the first adjusting rod and / or the second adjusting rod, the position of the supporting seat can be adjusted in two vertical directions, so that the positioning pin is accurately aligned with the lathe spindle, and the center of a workpiece is ensured to be completely aligned with the center of the lathe spindle.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece processing, and specifically relates to a fixture for a lathe. Background Technology

[0002] A lathe is a machine tool used for metal cutting. It is primarily used to remove material by rotating the workpiece and using a fixed cutting tool to form the desired shape and size. It is a widely used machine tool in mechanical manufacturing, capable of performing various operations such as turning external diameters, boring internal holes, grooving, threading, and taper turning.

[0003] When machining workpieces on a lathe, a three-jaw chuck is typically used for radial positioning of circular or symmetrical workpieces. A key feature of the three-jaw chuck is its self-centering capability; that is, when the three jaws move towards the center simultaneously, it ensures precise alignment between the center of the clamped workpiece and the center of the lathe spindle. However, for non-circular or asymmetrical workpieces, specially designed fixtures are often required to ensure proper fixation on the lathe. In existing technologies, due to the asymmetry of the workpiece shape, the fixture needs to be equipped with special positioning elements and multiple support points to ensure the stability of the workpiece during machining. However, compared to a three-jaw chuck, specialized fixtures, due to their complex design (containing multiple components), may experience wear due to assembly errors or prolonged use, leading to a deviation between the workpiece center and the lathe spindle center when the lathe spindle rotates the workpiece. This deviation can cause problems such as dimensional deviations, increased shape errors, and increased surface roughness during machining, significantly reducing machining quality. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, the technical problem this invention aims to solve is to provide a fixture for lathes. By setting an adjustment assembly on a fixed plate, the first and second adjustment rods in the adjustment assembly are perpendicular to each other in their axial directions. This allows adjustment of the support position in two perpendicular directions, ensuring that the locating pin is precisely aligned with the lathe spindle center. This guarantees that the workpiece center is perfectly aligned with the lathe spindle center, thus reducing machining errors caused by misalignment between the workpiece center and the lathe spindle. This not only improves machining accuracy but also ensures the quality of the final product.

[0005] The technical solution adopted by this utility model to solve its technical problem is to provide a fixture for a lathe, used to fix a workpiece on the lathe spindle along the axial direction of the workpiece, wherein one side of the workpiece has a through hole aligned with its central axis, and the fixture includes:

[0006] A fixing plate, which is fixedly mounted on the lathe spindle;

[0007] A support base is provided on the fixed plate, and the support base has a positioning pin. The workpiece is placed on the support base, and the positioning pin is inserted into the through hole.

[0008] An adjustment assembly is disposed on the fixed plate and has a first adjustment rod, a second adjustment rod, a first support block, and a second support block. The axial directions of the first adjustment rod and the second adjustment rod are perpendicular to each other and are respectively threaded onto the first support block and the second support block. One end of the first adjustment rod and one end of the second adjustment rod are both connected to the support base.

[0009] The support base can move relative to the fixed plate by rotating the first adjusting rod and / or the second adjusting rod, so as to accurately align the locating pin with the lathe spindle;

[0010] A fixing component, which is disposed on the fixing plate, is used to fix the workpiece on the support.

[0011] In the above-mentioned fixture for a lathe, the first support block is provided with a through first threaded hole, the first adjusting rod is provided with an external thread, the first adjusting rod is connected to the first support block through the external thread, and one end of the first adjusting rod passes through the first threaded hole and is connected to the support seat.

[0012] In the aforementioned fixture for a lathe, the second support block is provided with a through second threaded hole, the second adjusting rod is provided with an external thread, the second adjusting rod is threadedly connected to the second support block through the external thread, and one end of the second adjusting rod passes through the second threaded hole and is connected to the support base.

[0013] In the above-mentioned fixture for a lathe, a first T-shaped groove is provided on one side of the support base, and a first connecting part is provided at one end of the first adjusting rod, the first connecting part being connected to the large end of the first T-shaped groove.

[0014] In the aforementioned fixture for a lathe, a second T-shaped groove is provided on one side of the support base, and a second connecting part is provided at one end of the second adjusting rod, the second connecting part being connected to the large end of the second T-shaped groove.

[0015] In the aforementioned fixture for a lathe, the adjusting assembly further includes at least two guide blocks, which are disposed on the fixed plate. The support base is provided with guide holes that match the guide blocks. The guide holes are sleeved on the guide blocks and can move along the guide blocks as the support base moves relative to the fixed plate, thereby providing guidance for the movement of the support base.

[0016] In the aforementioned fixture for a lathe, the support base is provided with a plurality of through third threaded holes, and each third threaded hole is connected to a bolt. One end of the bolt passes through the third threaded hole and is connected to the fixing plate, and there is a gap between the bolt and the third threaded hole.

[0017] In the aforementioned fixture for a lathe, the fixing assembly includes:

[0018] A pressure block is rotatably disposed above the support base and moves against the workpiece to fix the workpiece on the support base;

[0019] A driving component is mounted on a fixed plate, and the pressure block is rotatably mounted at the output end of the driving component. The driving component is used to drive the pressure block to rotate.

[0020] In one of the above-mentioned fixtures for a lathe, the support base is further provided with a positioning block, which abuts against the outer wall of the workpiece to provide positioning for the workpiece.

[0021] In the aforementioned fixture for a lathe, a first handle is provided at the end of the first adjusting rod away from the support, and a second handle is provided at the end of the second adjusting rod away from the support.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By rotating the first adjusting rod and / or the second adjusting rod, the axial directions of the first adjusting rod and the second adjusting rod are perpendicular to each other, and the position of the support can be adjusted in two perpendicular directions so that the positioning pin is precisely aligned with the center of the lathe spindle, thereby ensuring that the center of the workpiece is completely aligned with the center of the lathe spindle. This adjustment process avoids the machining error caused by the misalignment between the center of the workpiece and the lathe spindle, which not only improves the machining accuracy, but also ensures the quality of the final product.

[0024] (2) The first support block and the second support block provide support for the first adjusting rod and the second adjusting rod, while the first threaded hole and the second threaded hole provide guidance for the movement of the first adjusting rod and the second adjusting rod, respectively, to ensure that the adjustment process is smooth and accurate;

[0025] (3) The guide hole on the support base cooperates with the guide block on the fixed plate to provide precise guidance for the fine adjustment of the support base relative to the fixed plate. This design not only improves the accuracy of the adjustment, but also significantly improves the operating efficiency. Attached Figure Description

[0026] Figure 1 This is a 3D view of the proposed solution;

[0027] Figure 2 yes Figure 1 Three-dimensional view of the middle section structure;

[0028] Figure 3 yes Figure 1 Three-dimensional view of the middle section structure;

[0029] Figure 4 This is a 3D view of the support base in this design;

[0030] Figure 5 This is a 3D view of the workpiece in this solution.

[0031] In the diagram, 1. Fixed plate; 2. Support base; 3. Positioning pin; 4. Adjustment assembly; 5. First adjusting rod; 6. Second adjusting rod; 7. First support block; 8. Second support block; 9. Fixed assembly; 10. First T-slot; 11. First connecting part; 12. Second T-slot; 13. Second connecting part; 14. Guide block; 15. Guide hole; 16. Third threaded hole; 17. Pressure block; 18. Driving component; 19. Positioning block; 20. First handle; 21. Second handle; 22. Workpiece; 23. Through hole. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] like Figures 1 to 5 As shown, this solution provides a fixture for a lathe, used to fix a workpiece 22 to the lathe spindle along the axial direction. One side of the workpiece 22 has a through hole 23 aligned with its central axis. The fixture includes: a fixed plate 1, fixed to the lathe spindle; a support base 2, mounted on the fixed plate 1, with a locating pin 3 on the support base 2; the workpiece 22 is placed on the support base 2, and the locating pin 3 is inserted into the through hole 23; an adjusting assembly 4, mounted on the fixed plate 1, having a first adjusting rod 5, a second adjusting rod 6, a first support block 7, and a second support block 8; the axial directions of the first adjusting rod 5 and the second adjusting rod 6 are perpendicular to each other and are threadedly connected to the first support block 7 and the second support block 8, respectively; one end of the first adjusting rod 5 and one end of the second adjusting rod 6 are both connected to the support base 2; the support base 2 can move relative to the fixed plate 1 by rotating the first adjusting rod 5 and / or the second adjusting rod 6, to ensure accurate alignment of the locating pin 3 with the lathe spindle; and a fixing assembly 9, mounted on the fixed plate 1, used to fix the workpiece 22 to the support base 2.

[0035] During operation, the workpiece 22 is firmly fixed to the support base 2 by the fixing component 9. The positioning pin 3 on the support base 2 is inserted into the through hole 23 aligned with the center of the workpiece 22, ensuring the initial positioning accuracy of the workpiece 22. When the lathe spindle drives the fixture and the workpiece 22 to start rotating, if there is a deviation between the center of the workpiece 22 and the center of the lathe spindle, the detection device on the lathe will detect this deviation. Once the deviation is detected, the system will automatically pause the machining operation for adjustment. By rotating the first adjusting rod 5 and / or the second adjusting rod 6, since the axial directions of the first adjusting rod 5 and the second adjusting rod 6 are perpendicular to each other, the position of the support base 2 can be adjusted in two perpendicular directions, so that the positioning pin 3 is precisely aligned with the center of the lathe spindle, thereby ensuring that the center of the workpiece 22 is completely aligned with the center of the lathe spindle. This adjustment process effectively avoids the deviation between the center of the workpiece 22 and the center of the lathe spindle when the lathe spindle drives the workpiece 22 to rotate due to the complex design of the fixture (containing multiple components), assembly errors, or wear after long-term use. This not only improves the machining accuracy but also ensures the quality of the final product.

[0036] Furthermore, the first support block 7 is provided with a through first threaded hole, and the first adjusting rod 5 is equipped with an external thread and is threadedly connected to the first threaded hole on the first support block 7 through the external thread. One end of the first adjusting rod 5 passes through the first threaded hole and is connected to the support seat 2. The first support block 7 not only provides support for the first adjusting rod 5, but also provides guidance for its movement. When the first adjusting rod 5 is rotated, it will move along the direction of the first threaded hole, thereby causing the support seat 2 to make a corresponding displacement relative to the fixed plate 1.

[0037] Furthermore, the second support block 8 is provided with a through second threaded hole, and the second adjusting rod 6 is equipped with an external thread and is threadedly connected to the second threaded hole on the second support block 8 through the external thread. One end of the second adjusting rod 6 passes through the second threaded hole and is connected to the support seat 2. The second support block 8 also provides support and guidance for the second adjusting rod 6. When the second adjusting rod 6 is rotated, it will move along the direction of the second threaded hole, thereby causing the support seat 2 to make a corresponding displacement relative to the fixed plate 1.

[0038] In order to connect the first adjusting rod 5 and the support base 2, a first T-shaped groove 10 is provided on one side of the support base 2, and a first connecting part 11 is provided at one end of the first adjusting rod 5. The first connecting part 11 is embedded and fixed in the large end of the first T-shaped shaft to ensure that the first adjusting rod 5 can drive the support base 2 to move.

[0039] In order to connect the second adjusting member and the support base 2, a second T-shaped groove 12 is provided on one side of the support base 2, and a second connecting part 13 is provided at one end of the second adjusting rod 6. The second connecting part 13 is embedded and fixed in the second T-shaped groove 12 to ensure that the second adjusting rod 6 can drive the support base 2 to move.

[0040] To provide guidance for the adjustment of the support base 2 relative to the fixed plate 1, the adjustment assembly 4 also includes at least two guide blocks 14. The guide blocks 14 are disposed on the fixed plate 1, and the support base 2 is provided with guide holes 15 that match the guide blocks 14. The guide holes 15 are fitted onto the guide blocks 14 and can move along the guide blocks 14 as the support base 2 moves relative to the fixed plate 1, thereby providing guidance for the movement of the support base 2. This design not only ensures a more precise adjustment process but also improves operational efficiency.

[0041] In order to enable the support base 2 to be connected to the fixing plate 1 and to allow fine adjustment, the support base 2 is provided with a number of third threaded holes 16, and each third threaded hole 16 is connected to a bolt. One end of the bolt passes through these third threaded holes 16 and is connected to the fixing plate 1. In particular, a certain gap is designed between the bolt and the third threaded hole 16 on the support base 2. This gap is used to accommodate the fine adjustment of the support base 2 relative to the fixing plate 1.

[0042] When the fixture in this solution is installed onto the lathe spindle, the locating pin 3 is pre-aligned with the lathe spindle. However, due to the complex design of the fixture (containing multiple components), wear may occur due to assembly errors or after long-term use, which may cause the center of the workpiece 22 to deviate from the center of the lathe spindle during the rotation of the lathe spindle. This deviation is very small, so only the support seat 2 needs to be fine-tuned. If it is found that the center of the workpiece 22 on the support seat 2 is not aligned with the center of the lathe spindle, first loosen the bolts connecting the support seat 2 and the fixing plate 1. Then, move the support seat 2 relative to the fixing plate 1 by rotating the first adjusting rod 5 and the second adjusting rod 6 until the center of the workpiece 22 is completely aligned with the lathe spindle. Because there is a gap between the bolt and the third threaded hole 16, the bolt can still pass smoothly through the third threaded hole 16 and reconnect with the fixing plate 1 after the support seat 2 is fine-tuned, thus ensuring the stability after adjustment.

[0043] Furthermore, the fixing component 9 includes: a pressure block 17, which is rotatably disposed above the support base 2 and moves against the workpiece 22 for fixing the workpiece 22 on the support base 2; and a driving component 18, which is disposed on the fixing plate 1. The pressure block 17 is rotatably disposed at the output end of the driving component 18, and the driving component 18 can drive the pressure block 17 to rotate, thereby fastening or loosening the workpiece 22. The driving component 18 can be a motor, a hydraulic cylinder, or a pneumatic cylinder.

[0044] In order to provide accurate positioning for workpiece 22 on support base 2, positioning block 19 is also provided on support base 2. Positioning block 19 contacts the outer wall of workpiece 22 to ensure accurate positioning of workpiece 22.

[0045] During operation, firstly, the workpiece 22 is placed on the support base 2, so that the outer wall of the workpiece 22 contacts the positioning block 19 on the support base 2, providing initial positioning for the workpiece 22. Then, the positioning pin 3 on the support base 2 is inserted into the through hole 23 of the workpiece 22 to complete the initial centering of the workpiece 22. Finally, the drive component 18 is activated, which drives the pressure block 17 to rotate and closely abut against the workpiece 22, firmly fixing the workpiece 22 on the support base 2. Thus, the fixing and precise positioning operation of the workpiece 22 is completed.

[0046] To provide a simple and effective means of rotating the first adjusting rod 5 and the second adjusting rod 6, a first handle 20 is provided at the end of the first adjusting rod 5 away from the support seat 2. This is designed to allow the operator to manually rotate the first adjusting rod 5 to adjust the position of the support seat 2 to achieve alignment between the workpiece 22 and the lathe spindle. Similarly, a second handle 21 is provided at the end of the second adjusting rod 6 away from the support seat 2, allowing the operator to adjust the second adjusting rod 6 by rotating the second handle 21, thereby fine-tuning the position of the support seat 2. By providing the first handle 20 and the second handle 21 at the ends of the first adjusting rod 5 and the second adjusting rod 6 respectively, not only is the convenience and efficiency of operation improved, but the operator is also allowed to apply more precise force and control, which is especially important for work requiring frequent or fine adjustments. This design ensures that even minor deviations can be effectively corrected, thereby guaranteeing accurate alignment between the workpiece 22 and the lathe spindle and avoiding machining quality problems caused by deviations.

[0047] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A fixture for a lathe for fixing a workpiece to the lathe spindle along the axial direction, said workpiece having a through hole on one side aligned with its central axis, characterized in that, The clamp includes: A fixing plate, which is fixedly mounted on the lathe spindle; A support base is provided on the fixed plate, and the support base has a positioning pin. The workpiece is placed on the support base, and the positioning pin is inserted into the through hole. An adjustment assembly is disposed on the fixed plate and has a first adjustment rod, a second adjustment rod, a first support block, and a second support block. The axial directions of the first adjustment rod and the second adjustment rod are perpendicular to each other and are respectively threaded onto the first support block and the second support block. One end of the first adjustment rod and one end of the second adjustment rod are both connected to the support base. The support base can move relative to the fixed plate by rotating the first adjusting rod and / or the second adjusting rod, so as to accurately align the locating pin with the lathe spindle; A fixing component, which is disposed on the fixing plate, is used to fix the workpiece on the support.

2. The fixture for a lathe as described in claim 1, characterized in that, The first support block has a through threaded hole, and the first adjusting rod has an external thread. The first adjusting rod is connected to the first support block through the external thread, and one end of the first adjusting rod passes through the first threaded hole and is connected to the support base.

3. The fixture for a lathe as described in claim 1, characterized in that, The second support block is provided with a through second threaded hole, the second adjusting rod is provided with an external thread, the second adjusting rod is threaded to the second support block through the external thread, and one end of the second adjusting rod passes through the second threaded hole and is connected to the support base.

4. A fixture for a lathe as described in claim 2, characterized in that, A first T-shaped groove is provided on one side of the support base, and a first connecting part is provided at one end of the first adjusting rod, the first connecting part being connected to the large end of the first T-shaped groove.

5. A fixture for a lathe as described in claim 3, characterized in that, A second T-shaped groove is provided on one side of the support base, and a second connecting part is provided at one end of the second adjusting rod, the second connecting part being connected to the large end of the second T-shaped groove.

6. A fixture for a lathe as described in claim 1, characterized in that, The adjustment assembly further includes at least two guide blocks, which are disposed on the fixed plate. The support base is provided with guide holes that match the guide blocks. The guide holes are sleeved on the guide blocks and can move along the guide blocks as the support base moves relative to the fixed plate, thereby providing guidance for the movement of the support base.

7. A fixture for a lathe as described in claim 1, characterized in that, The support base is provided with a plurality of through third threaded holes, and each third threaded hole is connected to a bolt. One end of the bolt passes through the third threaded hole and is connected to the fixing plate, and there is a gap between the bolt and the third threaded hole.

8. A fixture for a lathe as described in claim 1, characterized in that, The fixing component includes: A pressure block is rotatably disposed above the support base and moves against the workpiece to fix the workpiece on the support base; A driving component is mounted on a fixed plate, and the pressure block is rotatably mounted at the output end of the driving component. The driving component is used to drive the pressure block to rotate.

9. A fixture for a lathe as described in claim 1, characterized in that, The support base is also provided with a positioning block, which abuts against the outer wall of the workpiece to provide positioning for the workpiece.

10. A fixture for a lathe as described in claim 1, characterized in that, The first adjusting rod has a first handle at the end away from the support base, and the second adjusting rod has a second handle at the end away from the support base.

Images