High-precision positioning clamp of numerical control machine tool
By designing a high-precision positioning fixture for CNC machine tools, and using cylinders and servo motors to control the deflection of the feeding plate and the clamping of the jaws, the problems of pipe position offset and inaccurate feeding were solved, thus improving processing accuracy and quality.
Patent Information
- Application Number
- CN202520561654.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing CNC fixtures cannot accurately determine the position in pipe fitting processing, resulting in positional deviations and difficulty in controlling the feeding position during processing, which affects processing accuracy and quality.
A high-precision positioning fixture for CNC machine tools is adopted. The rotation of the transmission shaft is controlled by a cylinder to achieve the deflection of the material plate. The clamping of the jaws is controlled by a servo motor to achieve precise transfer and center positioning of the pipe fittings. The lifting plate is raised and lowered by the lead screw driven by the servo motor, which improves the clamping accuracy.
It enables precise transfer and center positioning clamping of pipe fittings, improving processing accuracy and clamping precision, and ensuring the quality of subsequent processing.
Smart Images
Figure CN223933108U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine tool fixture technology, and in particular to a high-precision positioning fixture for CNC machine tools. Background Technology
[0002] With the rapid development of the manufacturing industry, higher and higher requirements are being placed on the machining accuracy and efficiency of CNC machine tools. In the machining process of CNC machine tools, the fixture is a key component that connects the machine tool and the workpiece. Its performance directly affects the machining accuracy, surface quality and production efficiency of the workpiece.
[0003] Currently, existing CNC fixtures cannot accurately determine the position of pipe fittings during processing, leading to positional deviations during processing. Furthermore, it is difficult to accurately control the feeding position of the pipe fittings, resulting in positional deviations in subsequent processing and affecting processing accuracy and quality. Utility Model Content
[0004] The purpose of this invention is to solve the problem that existing CNC fixtures cannot accurately determine the position of pipe fittings during processing, resulting in positional deviations during processing and difficulty in accurately controlling the feeding position of the pipe fittings, leading to positional deviations in subsequent processing and affecting processing accuracy and quality. Therefore, a high-precision positioning fixture for CNC machine tools is proposed.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-precision positioning fixture for a CNC machine tool, comprising a support frame, a clamping mechanism fixedly mounted on the top surface of the support frame, and a feeding mechanism mounted on one side of the support frame. The clamping mechanism includes a fixed plate, a servo motor, and a fixed frame. The fixed plate is fixedly connected to the top surface of the support frame. The servo motor is mounted on the outer wall of the fixed plate. Both ends of the fixed frame are rotatably connected to grippers. The servo motor is driven to the grippers. The servo motor is used to control the rotation between the ends of the two grippers to achieve the clamping operation. The feeding mechanism includes a lifting plate, a transmission shaft, a connecting seat, a placing plate, and a cylinder. The transmission shaft is rotatably mounted on the outer wall of the lifting plate. The cylinder is fixedly mounted on the outer wall of the lifting plate. The bottom end of the connecting seat is fixedly connected to the top end of the transmission shaft. The center of the bottom surface of the placing plate is fixedly connected to the top end of the connecting seat. One end of the telescopic rod of the cylinder is driven to the transmission shaft. The cylinder is used to control the rotation of the transmission shaft to achieve the deflection control of the placing plate.
[0006] Preferably, the feeding mechanism also includes a base plate, on the outside of which a second servo motor is mounted. The output shaft of the second servo motor is fixedly connected to a second lead screw, and a threaded sleeve is threaded onto the outer wall of the second lead screw. The threaded sleeve is fixedly connected to the outer wall of the lifting plate.
[0007] Preferably, the lifting plate and the base plate are movably connected by a slider and a slide rail.
[0008] Preferably, the outer wall of the lifting plate is provided with a sliding groove, the inner wall of the sliding groove is movably connected with a toothed plate, and the outer wall of the toothed plate is meshed with a gear.
[0009] Preferably, the gear is fixedly sleeved on the outer wall of the drive shaft, and one end of the cylinder's telescopic rod is fixedly connected to the outer wall of the gear.
[0010] Preferably, a support plate is fixedly connected to the inner wall of the fixed frame, a pad is fixedly installed on the outer wall of the fixed frame, a lead screw is rotatably connected to the end of the support plate, and connecting blocks are threaded onto the outer walls of both ends of the lead screw, and the connecting blocks are rotatably connected to one end of the gripper.
[0011] Preferably, one end of the lead screw is fixedly connected to the output shaft end of the fixed plate.
[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0013] 1. In this utility model, the pipe fitting is fixed on the placement plate, and the transmission shaft is rotated by controlling the cylinder to control the placement plate to complete a 180° horizontal deflection, so as to accurately transfer the pipe fitting to the front of the fixing frame. With the help of the servo motor, the grippers on both sides of the fixing frame are synchronously deflected to perform center clamping and fixing, thereby realizing the precise transfer and center positioning of the pipe fitting, and thus improving the subsequent processing accuracy of the pipe fitting.
[0014] 2. In this utility model, by setting a servo motor two on the base plate, when the pipe is transferred, the servo motor two drives the lead screw two to rotate and drive the threaded sleeve block to move the lifting plate up and down, thereby making it convenient for the user to control the height of the pipe transferred on the material plate and further improving the clamping accuracy of the pipe. Attached Figure Description
[0015] Figure 1 A three-dimensional structural diagram of a high-precision positioning fixture for a CNC machine tool is provided for this utility model;
[0016] Figure 2 This utility model proposes a high-precision positioning fixture for CNC machine tools. Figure 1 Enlarged view of the structure at point A in the middle;
[0017] Figure 3 This utility model provides a schematic diagram of the internal structure of a high-precision positioning fixture fixing frame for CNC machine tools;
[0018] Figure 4 This utility model provides a schematic diagram of the connection structure between the lifting plate and the base plate of a high-precision positioning fixture for a CNC machine tool.
[0019] Legend: 1. Support frame; 2. Clamping mechanism; 21. Fixed plate; 22. Servo motor one; 23. Fixed frame; 24. Gripper; 25. Support plate; 26. Lead screw one; 27. Connecting block; 28. Pad plate; 3. Feeding mechanism; 31. Lifting plate; 311. Slide groove; 312. Toothed plate; 313. Gear; 32. Drive shaft; 33. Connecting seat; 34. Material placement plate; 35. Cylinder; 36. Base plate; 361. Servo motor two; 362. Lead screw two; 363. Threaded sleeve block. Detailed Implementation
[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0022] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a high-precision positioning fixture for CNC machine tools, including a support frame 1. A clamping mechanism 2 is fixedly installed on the top surface of the support frame 1, and a feeding mechanism 3 is installed on one side of the support frame 1. The clamping mechanism 2 includes a fixed plate 21, a servo motor 22, and a fixed frame 23. The fixed plate 21 is fixedly connected to the top surface of the support frame 1. The servo motor 22 is installed on the outer wall of the fixed plate 21. Both ends of the fixed frame 23 are rotatably connected to grippers 24. The servo motor 22 is connected to the grippers 24 through a transmission connection. The servo motor 22 is used to control the two grippers. The clamping operation is achieved by rotating the ends of the grippers 24. The feeding mechanism 3 includes a lifting plate 31, a drive shaft 32, a connecting seat 33, a placing plate 34, and a cylinder 35. The drive shaft 32 is rotatably mounted on the outer wall of the lifting plate 31, and the cylinder 35 is fixedly mounted on the outer wall of the lifting plate 31. The bottom end of the connecting seat 33 is fixedly connected to the top end of the drive shaft 32, and the center of the bottom surface of the placing plate 34 is fixedly connected to the top end of the connecting seat 33. One end of the telescopic rod of the cylinder 35 is connected to the drive shaft 32 for transmission. The cylinder 35 is used to control the rotation of the drive shaft 32 to achieve the deflection control of the placing plate 34.
[0023] The specific settings and functions of this embodiment are described below. By fixing the pipe on the placement plate 34, the transmission shaft 32 is rotated by the control cylinder 35, thereby controlling the placement plate 34 to complete a 180° horizontal deflection. The pipe is accurately transferred to the front of the fixing frame 23. With the help of the servo motor 22, the grippers 24 on both sides of the fixing frame 23 are synchronously deflected for center clamping and fixing, thereby realizing the precise transfer and center positioning clamping of the pipe, and thus improving the subsequent processing accuracy of the pipe.
[0024] Example 2: Figure 1 - Figure 4 As shown, the feeding mechanism 3 also includes a base plate 36. A servo motor 361 is mounted on the outside of the base plate 36. A lead screw 362 is fixedly connected to the output shaft end of the servo motor 361. A threaded sleeve 363 is threaded onto the outer wall of the lead screw 362. The threaded sleeve 363 is fixedly connected to the outer wall of the lifting plate 31. The lifting plate 31 and the base plate 36 are movably connected through a slider and a slide rail. A groove 311 is provided on the outer wall of the lifting plate 31. A toothed plate 312 is movably connected to the inner wall of the groove 311. The outer wall of the toothed plate 312 meshes with the toothed plate. A gear 313 is connected to the transmission shaft 32. The gear 313 is fixedly sleeved on the outer wall of the transmission shaft 32. One end of the telescopic rod of the cylinder 35 is fixedly connected to the outer wall of the gear 313. A support plate 25 is fixedly connected to the inner wall of the fixed frame 23. A pad 28 is fixedly installed on the outer wall of the fixed frame 23. A lead screw 26 is rotatably connected to the end of the support plate 25. Both ends of the lead screw 26 are threaded with connecting blocks 27. The connecting blocks 27 are rotatably connected to one end of the gripper 24. One end of the lead screw 26 is fixedly connected to the output shaft end of the fixed plate 21.
[0025] The overall effect of this embodiment is that, by setting the servo motor 361 on the base plate 36, when the pipe is transferred, the servo motor 361 drives the lead screw 362 to rotate and drive the threaded sleeve block 363 to move the lifting plate 31 up and down. This makes it convenient for the user to control the height of the pipe transferred on the material plate 34, and further improves the clamping accuracy of the pipe. The connecting block 27 is synchronously approached or separated by the lead screw 26 driven by the fixed plate 21, thereby realizing the synchronous clamping of the two grippers 24, and the center positioning clamping is achieved with the help of the pad plate 28.
[0026] The usage and working principle of this device are as follows: When in use, the user places the pipe on the placement plate 34 and fixes it. By controlling the cylinder 35, the user pushes the toothed plate 312 to move, so that the gear 313 drives the transmission shaft 32 to control the placement plate 34 to complete a 180° horizontal deflection, accurately transferring the pipe to the front of the fixing frame 23. With the help of the servo motor 22, the clamps 24 on both sides of the fixing frame 23 are controlled to deflect synchronously for center clamping and fixing. Through the servo motor 361 on the base plate 36, when transferring the pipe, the servo motor 361 drives the lead screw 362 to rotate, which drives the threaded sleeve block 363 to drive the lifting plate 31 to move up and down, so that the user can easily control the height of the pipe transferred on the placement plate 34.
[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A high-precision positioning fixture for a CNC machine tool, comprising a support frame (1), characterized in that: A clamping mechanism (2) is fixedly installed on the top surface of the support frame (1), and a feeding mechanism (3) is installed on one side of the support frame (1). The clamping mechanism (2) includes a fixed plate (21), a servo motor (22), and a fixed frame (23). The fixed plate (21) is fixedly connected to the top surface of the support frame (1). The servo motor (22) is installed on the outer wall of the fixed plate (21). Both ends of the fixed frame (23) are rotatably connected to grippers (24). The servo motor (22) is connected to the grippers (24) by transmission. The servo motor (22) is used to control the rotation between the ends of the two grippers (24) to realize the clamping operation. The feeding mechanism (3) includes a lifting plate (31), a drive shaft (32), a connecting seat (33), a placing plate (34), and a cylinder (35). The drive shaft (32) is rotatably mounted on the outer wall of the lifting plate (31), and the cylinder (35) is fixedly mounted on the outer wall of the lifting plate (31). The bottom end of the connecting seat (33) is fixedly connected to the top end of the drive shaft (32), and the center of the bottom surface of the placing plate (34) is fixedly connected to the top end of the connecting seat (33). One end of the telescopic rod of the cylinder (35) is connected to the drive shaft (32) for transmission. The cylinder (35) is used to control the rotation of the drive shaft (32) to achieve the deflection control of the placing plate (34).
2. The high-precision positioning fixture for a CNC machine tool according to claim 1, characterized in that: The feeding mechanism (3) also includes a base plate (36), on the outside of which a second servo motor (361) is installed. The output shaft end of the second servo motor (361) is fixedly connected to a second lead screw (362). The outer wall of the second lead screw (362) is threaded with a threaded sleeve block (363), which is fixedly connected to the outer wall of the lifting plate (31).
3. A high-precision positioning fixture for a CNC machine tool according to claim 2, characterized in that: The lifting plate (31) and the base plate (36) are connected by a slider and a slide rail.
4. A high-precision positioning fixture for a CNC machine tool according to claim 3, characterized in that: The outer wall of the lifting plate (31) is provided with a sliding groove (311), the inner wall of the sliding groove (311) is movably connected with a toothed plate (312), and the outer wall of the toothed plate (312) is meshed with a gear (313).
5. A high-precision positioning fixture for a CNC machine tool according to claim 4, characterized in that: The gear (313) is fixedly sleeved on the outer wall of the transmission shaft (32), and one end of the telescopic rod of the cylinder (35) is fixedly connected to the outer wall of the gear (313).
6. A high-precision positioning fixture for a CNC machine tool according to claim 1, characterized in that: A support plate (25) is fixedly connected to the inner wall of the fixed frame (23), and a pad (28) is fixedly installed on the outer wall of the fixed frame (23). A lead screw (26) is rotatably connected to the end of the support plate (25). A connecting block (27) is threaded onto the outer wall of both ends of the lead screw (26). The connecting block (27) is rotatably connected to one end of the clamp (24).
7. A high-precision positioning fixture for a CNC machine tool according to claim 6, characterized in that: One end of the lead screw (26) is fixedly connected to the output shaft end of the fixed plate (21).