A supplementary positioning fixture for a lathe

Abstract

This application relates to the field of lathe fixture technology, and in particular to an auxiliary positioning fixture for a lathe, including a mounting shank and a workpiece. The bottom surface of the mounting shank is provided with an elastic component for reciprocating motion when the workpiece contacts a three-jaw chuck. The elastic component is provided with a connecting component for mounting the workpiece. The top surface of the mounting shank has a plurality of mounting holes, which are evenly distributed in a circular array on the top surface of the mounting shank. The elastic component includes a plurality of springs, one end of which is fixedly connected to the bottom of the mounting hole, and the other end of which is provided to the connecting component. When the device is in use, the springs are compressed. According to the elastic potential energy of the springs, the amount of compression is converted into a constant clamping force, so that the positioning surface at the end face of the workpiece is firmly attached to the jaw surface. Then, by clamping the workpiece with the jaws of the chuck on the machine tool, the workpiece is more stable during processing, resulting in more accurate dimensions and effectively improving the working efficiency of the device.

Description

Technical Field

[0001] This application relates to the field of lathe fixture technology, and in particular to an auxiliary positioning fixture for a lathe. Background Technology

[0002] Lathe machining is a process in which materials such as metal, plastic, and wood are cut and shaped by rotating the workpiece while the cutting tool moves axially or radially.

[0003] In the process of machining machine housings or rotating parts on existing horizontal lathes, the horizontal lathe process does not have auxiliary positioning and clamping fixtures. When clamping parts, factors such as the weight of the parts and poor consistency of clamping by the operators can lead to positioning errors. As a result, the positioning surface of the parts may not be fully aligned with the support surface of the existing fixture, which may also cause deviations in the positioning surface of the workpiece. This may result in a large deviation between the finished workpiece size and the preset size, making the working efficiency of the equipment low. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an auxiliary positioning fixture for lathes. This fixture solves the problem that when clamping parts, factors such as the weight of the parts and poor consistency in clamping by the operators can lead to positioning errors, resulting in incomplete fit between the part positioning surface and the support surface of the existing fixture. This can also cause deviations in the workpiece positioning surface, which may result in a large deviation between the finished workpiece size and the preset size, thus reducing the efficiency of the device.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: an auxiliary positioning fixture for a lathe, including a mounting shank and a workpiece, wherein the bottom surface of the mounting shank is provided with an elastic component for reciprocating motion when the workpiece contacts a three-jaw chuck, and a connecting component for mounting the workpiece is provided on the elastic component.

[0006] Furthermore, the top surface of the mounting handle is provided with several mounting holes, which are evenly distributed in a circular array on the top surface of the mounting handle. The elastic component includes several springs, one end of which is fixedly connected to the bottom of the mounting hole, and the other end of which is disposed on the connecting component.

[0007] Furthermore, the connecting component includes an inner positioning sleeve and support pins. Several support pins are provided and arranged in a circumferential array on the bottom surface of the inner positioning sleeve. Several connecting grooves are opened on the top surface of the inner positioning sleeve and are evenly distributed in a circumferential array on the top surface of the inner positioning sleeve. The ends of several springs away from the mounting handle are respectively fixedly connected to several connecting grooves. The workpiece is inserted into the inner positioning sleeve.

[0008] Furthermore, the elastic component also includes a positioning pin. The top surface of the inner positioning sleeve has a through hole, one end of which is fixedly connected to the top surface of the mounting handle, and the positioning pin is inserted into the through hole.

[0009] Furthermore, the connecting assembly also includes a mounting block, a first screw, a second screw, a pin, and a limiting rod. The mounting block is fixedly mounted on the top surface of the inner positioning sleeve. The bottom surface of the mounting block has an insertion hole and a threaded hole. The bottom surface of the inner positioning sleeve has two insertion holes, corresponding to the pin and the first screw, respectively. The pin is inserted into the insertion hole, and the first screw is threaded into the threaded hole. A screw hole is provided on one side of the mounting block, and the second screw is inserted into the screw hole. The limiting rod is fixedly connected to the bottom surface of the inner positioning sleeve. One side of the workpiece is positioned between the bottom end of the second screw and the limiting rod.

[0010] Furthermore, the connecting assembly also includes an outer positioning sleeve, which wraps around the inner positioning sleeve and the top end of the workpiece. The inner positioning sleeve has a countersunk hole on its arc surface, and the outer positioning sleeve has a fixing hole on its arc surface. The fixing hole is directly opposite the countersunk hole, and a third screw is inserted into the fixing hole and is spirally connected to the countersunk hole.

[0011] Furthermore, a positioning rod is fixedly connected to the top surface of the mounting handle, and the positioning rod is connected to the inner positioning sleeve and the workpiece.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] When using the device, the mounting handle is fixed to the tool magazine of the horizontal lathe, and the workpiece is mounted on the connecting assembly. When the tool magazine runs according to the lathe's program, it moves axially, and the workpiece is inserted into the three-jaw chuck. As the tool magazine continues to run, the workpiece is subjected to compressive force, causing the connecting assembly to compress the spring. The spring is compressed, and the springs are evenly distributed in a circular array on the top surface of the mounting handle, making the force more uniform. When the spring is compressed to a certain amount, the lathe's tool magazine stops running. At this time, according to the elastic potential energy of the spring, the amount of compression is converted into a constant clamping force, making the positioning surface at the end face of the workpiece firmly fit with the jaw surface. Then, by clamping the workpiece with the chuck jaws on the machine tool, the workpiece is more stable during processing, resulting in more accurate dimensions. Furthermore, by pre-mounting the workpiece on the connecting assembly, the movement direction of the device always remains axial, ensuring that the position of the next workpiece when clamped by the chuck jaws remains unchanged. This significantly reduces the errors that may occur when the operator manually mounts the workpiece on the chuck, effectively improving the working efficiency of the device.

[0014] When using the device, the support pin directly transmits the cutting force to the mounting handle, reducing elastic deformation, improving machining accuracy, and increasing the device's working efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device without an external positioning sleeve in the embodiment;

[0016] Figure 2This is an exploded view of the device without an outer casing in the embodiment;

[0017] Figure 3 This is an exploded view of another perspective device in the embodiment without an outer casing;

[0018] Figure 4 This is a schematic diagram of another viewing device without an external positioning sleeve in the embodiment;

[0019] Figure 5 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 6 This is a schematic diagram of the overall structure of the device in the embodiment.

[0021] Reference numerals: 1. Mounting handle; 11. Mounting hole; 12. Positioning rod; 2. Workpiece; 3. Elastic component; 31. Spring; 32. Positioning pin; 4. Connecting component; 41. Inner positioning sleeve; 411. Connecting groove; 42. Support pin; 43. Mounting block; 44. First screw; 45. Second screw; 46. Pin; 47. Limiting rod; 48. Outer positioning sleeve; 49. Third screw. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] Example, refer to Figures 1-6An auxiliary positioning fixture for a lathe includes a mounting shank 1 and a workpiece 2. The bottom surface of the mounting shank 1 is provided with an elastic component 3 for reciprocating motion when the workpiece 2 contacts a three-jaw chuck. A connecting component 4 for mounting the workpiece 2 is provided on the elastic component 3. The top surface of the mounting shank 1 has several mounting holes 11 evenly distributed in a circular array. The elastic component 3 includes several springs 31, one end of which is fixedly connected to the bottom of the mounting hole 11, and the other end of which is connected to the connecting component 4. When using the device, the mounting handle 1 is fixedly mounted on the tool magazine of the horizontal lathe, and the workpiece 2 is mounted on the connecting assembly 4. When the tool magazine runs according to the lathe's program, it moves axially, and the workpiece 2 is inserted into the three-jaw chuck. As the tool magazine continues to run, the workpiece 2 is subjected to compressive force, causing the connecting assembly 4 to compress the spring 31. The spring 31 is compressed, and the springs 31 are evenly distributed in a circular array on the top surface of the mounting handle 1, making the force more uniform. When the springs 31 are compressed to a certain number, the lathe's tool magazine stops running. At this time, according to... The elastic potential energy of spring 31 is converted into a constant clamping force by compression, which makes the positioning surface at the end face of workpiece 2 firmly fit with the jaw surface. Then, by clamping the workpiece 2 with the chuck jaws on the machine tool, the workpiece 2 is more stable during processing, resulting in more accurate dimensions. Furthermore, by pre-installing workpiece 2 on the connecting assembly 4, the movement direction of the device always remains axial, ensuring that the position of the next workpiece 2 when clamped by the chuck jaws remains unchanged. This significantly reduces the errors that may occur when the operator manually installs the workpiece on the chuck, effectively improving the working efficiency of the device.

[0024] Reference Figure 1 as well as Figure 2 The connecting assembly 4 includes an inner positioning sleeve 41 and a support pin 42. The top surface of the inner positioning sleeve 41 has several connecting grooves 411 evenly distributed around its circumference. Several springs 31 are fixedly connected to the connecting grooves 411 at their ends furthest from the mounting handle 1. The workpiece 2 is inserted into the inner positioning sleeve 41. When using the device, the support pin 42 directly transmits the cutting force received by the device to the mounting handle 1, reducing elastic deformation, improving machining accuracy, and increasing the device's working efficiency.

[0025] Reference Figure 1 as well as Figure 2 The elastic component 3 also includes a positioning pin 32. The bottom surface of the inner positioning sleeve 41 has a through hole, and one end of the positioning pin 32 is fixedly connected to the top surface of the mounting handle 1. The positioning pin 32 is inserted into the through hole. When the device needs to be assembled, the positioning pin 32 is inserted into the through hole for positioning and installation, which improves the positioning accuracy of the device and increases its working efficiency.

[0026] Reference Figure 1 , Figure 2 as well as Figure 4 The connecting component 4 also includes a mounting block 43, a first screw 44, a second screw 45, a pin 46, and a limiting rod 47. The mounting block 43 is fixedly installed on the top surface of the inner positioning sleeve 41. The bottom surface of the mounting block 43 is provided with an insertion hole and a threaded hole. The bottom surface of the inner positioning sleeve 41 is provided with two insertion holes, which correspond to the pin 46 and the first screw 44 respectively. The pin 46 is inserted into the insertion hole, and the first screw 44 is threaded into the threaded hole. A screw hole is provided on one side of the mounting block 43, and the second screw 45 is inserted into the screw hole. The limiting rod 47 is fixedly connected to the bottom surface of the inner positioning sleeve 41. One side of the workpiece 2 is located between the bottom end of the second screw 45 and the limiting rod 47. When assembling the device, the second screw 45 is screwed into the screw hole, and the bottom end of the second screw 45 abuts against one side of the workpiece 2, so that the workpiece 2 is between the second screw 45 and the limiting rod 47. Then, the pin 46 is inserted into the insertion hole and connected to the insertion hole. The first screw 44 is inserted into the insertion hole and screwed into the threaded hole, which prevents the workpiece 2 from loosening during the use of the device and improves the stability of the device.

[0027] Reference Figure 1 as well as Figure 6 The connecting component 4 also includes an outer positioning sleeve 48, which wraps around the inner positioning sleeve 41 and the top end of the workpiece 2. The inner positioning sleeve 41 has a countersunk hole on its arc surface, and the outer positioning sleeve 48 has a fixing hole on its arc surface. The fixing hole is directly opposite the countersunk hole, and a third screw 49 is inserted into the fixing hole and screwed into the countersunk hole. When using the device, by wrapping the inner positioning sleeve 41 with the outer positioning sleeve 48 and screwing the third screw 49 through the fixing hole into the countersunk hole, the outer positioning sleeve 48 and inner positioning sleeve 41 are firmly secured. After the workpiece 2 is installed on the three-jaw chuck and then removed, the three-jaw chuck clamps the workpiece 2, further improving the device's vibration resistance and load-bearing capacity.

[0028] Reference Figure 1 A positioning rod 12 is fixedly connected to the top surface of the mounting handle 1, and the positioning rod 12 connects to the inner positioning sleeve 41 and the workpiece 2. When assembling the device, the positioning rod 12 is aligned with the opening of the inner positioning sleeve 41 and the workpiece 2, so that the positioning rod 12 connects to the inside of the positioning sleeve and the workpiece 2, thereby completing the positioning installation and improving the ease of installation of the device.

[0029] Working principle:

[0030] When using the device, the mounting handle 1 is fixedly installed on the tool magazine of the horizontal lathe, and the workpiece 2 is installed on the inner positioning sleeve 41. When the tool magazine runs according to the lathe program, it moves axially, and the workpiece 2 is inserted into the three-jaw chuck. As the tool magazine continues to run, the workpiece 2 is subjected to compressive force, which causes the connecting component 4 to compress the spring 31. The spring 31 is compressed. When the spring 31 is compressed to a certain amount, the lathe tool magazine stops running, and the compressed amount is converted into a constant clamping force, so that the positioning surface at the end face of the workpiece 2 is firmly attached to the jaw surface. Then, by clamping the jaws of the chuck on the machine tool, the workpiece 2 is more stable during processing, resulting in more accurate dimensions. Furthermore, by installing the workpiece 2 on the connecting component 4 in advance, the movement direction of the device always remains axial, so that the position of the next workpiece 2 when clamped by the jaws of the chuck remains unchanged. This greatly reduces the errors that may occur when the operator manually installs the workpiece on the chuck, and effectively improves the working efficiency of the device.

[0031] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary positioning fixture for a lathe, comprising a mounting shank (1) and a workpiece (2), characterized in that: The bottom surface of the mounting handle (1) is provided with an elastic component (3) for reciprocating motion when the workpiece (2) contacts the three-jaw chuck, and a connecting component (4) for mounting the workpiece (2) is provided on the elastic component (3).

2. The auxiliary positioning fixture for a lathe according to claim 1, characterized in that: The top surface of the mounting handle (1) is provided with a plurality of mounting holes (11), which are evenly distributed in a circular array on the top surface of the mounting handle (1). The elastic component (3) includes a plurality of springs (31), one end of the plurality of springs (31) is fixedly connected to the bottom of the hole in the mounting hole (11), and the other end of the plurality of springs (31) is disposed on the connecting component (4).

3. The auxiliary positioning fixture for a lathe according to claim 2, characterized in that: The connecting component (4) includes an inner positioning sleeve (41) and a support pin (42). There are several support pins (42) arranged in a circular array on the bottom surface of the inner positioning sleeve (41). Several connecting grooves (411) are opened on the top surface of the inner positioning sleeve (41) and are evenly distributed in a circular array on the top surface of the inner positioning sleeve (41). One end of several springs (31) away from the mounting handle (1) is fixedly connected to several connecting grooves (411). The workpiece (2) is inserted into the inner positioning sleeve (41).

4. The auxiliary positioning fixture for a lathe according to claim 3, characterized in that: The elastic component (3) also includes a positioning pin (32). The top surface of the inner positioning sleeve (41) is provided with a through hole. One end of the positioning pin (32) is fixedly connected to the top surface of the mounting handle (1). The positioning pin (32) is inserted into the through hole.

5. An auxiliary positioning fixture for a lathe according to claim 3, characterized in that: The connecting assembly (4) further includes a mounting block (43), a first screw (44), a second screw (45), a pin (46), and a limiting rod (47). The mounting block (43) is fixedly installed on the top surface of the inner positioning sleeve (41). The bottom surface of the mounting block (43) is provided with an insertion hole and a threaded hole. The bottom surface of the inner positioning sleeve (41) is provided with two insertion holes, which correspond to the pin (46) and the first screw (44) respectively. The pin (46) is inserted into the insertion hole. The first screw (44) is threaded into the threaded hole. A screw hole is provided on one side of the mounting block (43). The second screw (45) is screwed into the screw hole. The limiting rod (47) is fixedly connected to the bottom surface of the inner positioning sleeve (41). One side of the workpiece (2) is located between the bottom end of the second screw (45) and the limiting rod (47).

6. An auxiliary positioning fixture for a lathe according to claim 3, characterized in that: The connecting component (4) further includes an outer positioning sleeve (48), which wraps around the inner positioning sleeve (41) and the top end of the workpiece (2). The inner positioning sleeve (41) has a countersunk hole on its arc surface, and the outer positioning sleeve (48) has a fixing hole on its arc surface. The fixing hole is directly opposite the countersunk hole, and a third screw (49) is inserted into the fixing hole and is spirally connected to the countersunk hole.

7. An auxiliary positioning fixture for a lathe according to claim 3, characterized in that: The top surface of the mounting handle (1) is fixedly connected to a positioning rod (12), which is connected to the inner positioning sleeve (41) and the workpiece (2).

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