Multifunctional clamp for workpiece machining
By using four sets of clamping plates and synchronous moving components, the workpiece is positioned symmetrically at four points, which solves the problem of asymmetrical positioning in the existing technology and improves processing accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-04-03
AI Technical Summary
Existing workpiece positioning methods are complex, time-consuming, and labor-intensive. They are also prone to asymmetry due to human factors and measurement errors, which affects processing accuracy and quality, increases the defect rate, and reduces production efficiency.
The design employs four sets of clamping plates, which simultaneously approach the workpiece sidewall for four-point positioning under the same power. The clamping points are symmetrical in pairs, and combined with components such as screws, moving blocks, and drive arms, synchronous movement and adjustment are achieved to ensure the symmetry and synchronicity of positioning.
It achieves high-precision and stable positioning of workpieces, avoids shaking and displacement, improves processing accuracy and quality, increases production efficiency, and meets the requirements of high-precision processing.
Smart Images
Figure CN224073843U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of fixture technology, specifically relating to a multi-functional fixture for workpiece processing. Background Technology
[0002] Fixtures can firmly hold workpieces, preventing them from shifting or shaking during machining, ensuring machining accuracy, and avoiding scrap caused by workpiece position deviations. At the same time, they can assist in positioning the workpiece, placing it in the ideal position for machine tool machining, facilitating cutting along a predetermined path and improving machining efficiency and quality.
[0003] A related technology (publication number CN218801493U) discloses a multifunctional fixture for workpiece processing, including a fixture support, a lower fixture frame, and an upper fixture frame. Multiple telescopic rods are fixedly mounted on the inner wall of the upper fixture frame. A pressure roller group that can conform to the outer wall of a pipe is hinged to the end of each telescopic rod. A friction belt is wound on two adjacent winding machines. The friction belt passes through the telescopic rods and is pressed against the outer wall of the pipe by the two adjacent pressure roller groups. By setting multiple sets of telescopic rods and installing pressure roller groups at the ends of the telescopic rods that can adapt to the curvature of the pipe surface, the pressure roller groups, after conforming to the pipe surface, can tightly press the friction belt against the pipe surface. Thus, the friction belt can maintain close contact with the pipe within the distance between two telescopic rods, thereby increasing the contact area with the pipe and increasing the resistance between the fixture and the pipe, ensuring the stability of the pipe during processing.
[0004] In current workpiece positioning practices using fixtures, the widely adopted method is point-by-point positioning. This method requires sequential positioning of multiple points on the workpiece, which is a complex process that consumes a lot of time and manpower. Furthermore, it is prone to human error and measurement errors during the operation, making it difficult to ensure the symmetry between the positioned points. Once the symmetry cannot be guaranteed, the workpiece is prone to unstable phenomena such as shaking and displacement during subsequent processing, affecting processing accuracy and quality, increasing the defect rate, and reducing production efficiency. Utility Model Content
[0005] To address the problems of existing technologies that involve sequentially positioning multiple points on a workpiece, which is cumbersome, time-consuming, and prone to human error and measurement inaccuracies, making it difficult to guarantee the symmetry between the positioned points, and causing instability such as wobbling and displacement during subsequent processing, thus affecting machining accuracy and quality, increasing defect rates, and reducing production efficiency, this invention provides a multi-functional workpiece machining fixture. This fixture, through its four sets of clamping plates, can simultaneously approach and position itself against the side wall of the workpiece body under the same power, achieving four-point positioning of the workpiece body in one operation. Furthermore, the positioned points are symmetrical, ensuring the symmetry of the clamping points after positioning and preventing instability such as wobbling and displacement caused by asymmetry in the workpiece positioning points. This further guarantees the accuracy and quality of subsequent workpiece machining, ensuring finished product efficiency and improving overall production efficiency. The specific technical solution is as follows:
[0006] A multi-functional workpiece machining fixture includes a base, on the upper surface of which two sets of positioning components are symmetrically arranged.
[0007] Each positioning assembly includes a base fixedly installed on the upper surface of the base. A limiting seat is fixedly installed on the base. A moving rod is horizontally extended through the limiting seat. A moving plate is installed on the side of the moving rod near the middle of the base, and the moving plate is perpendicular to the moving rod. A drive rod is rotatably connected to the front and rear ends of the moving plate. A moving arm is rotatably connected to the end of the drive rod away from the moving plate. The moving arm is slidably arranged along the length of the base. A connecting seat is connected to the side of the moving arm away from the base. A clamping plate is installed on the side wall of the connecting seat.
[0008] The two clamps at the front and rear positions are symmetrically arranged.
[0009] In the above technical solution, the moving arm is slidably connected to the base via a sliding component;
[0010] The sliding assembly includes a groove formed on the side wall of the seat, a guide rod installed from front to back in the groove, the movable arm being slidably sleeved on the guide rod, and the movable arm being slidably embedded in the groove.
[0011] In the above technical solution, the two moving rods on the left and right sides move in opposite or opposite directions via a drive unit:
[0012] The drive unit includes two support seats installed on the left and right side walls of the base. A screw is rotatably connected between the two support seats. The screw is provided with symmetrical external threads. Two moving blocks are threaded on the left and right sides of the screw respectively. A drive arm is vertically installed on the front side wall of each moving block.
[0013] The drive arm is perpendicularly connected to the moving rod.
[0014] In the above technical solution, the two moving blocks are arranged symmetrically with respect to the screw.
[0015] In the above technical solution, the right end of the screw extends out of the outer wall of the right support seat and is equipped with a handwheel.
[0016] In the above technical solution, an adjustment component is provided between the moving arm and the connecting seat:
[0017] The adjustment assembly includes an extension arm that is slidably inserted into the movable arm. The extension arm is fixedly connected to the connecting seat. Several insertion holes are equally spaced on the extension arm. A positioning pin is provided through the movable arm from top to bottom, and the bottom end of the positioning pin extends into the inner cavity of one of the insertion holes.
[0018] In the above technical solution, support legs are installed at the four corners of the bottom of the base.
[0019] In the above technical solution, the workpiece body is positioned between the four sets of clamping plates.
[0020] The multifunctional workpiece machining fixture of this utility model has the following advantages compared with the prior art:
[0021] I. Existing methods involve sequentially positioning multiple points on a workpiece, a complex process that consumes significant time and manpower. Furthermore, human error and measurement inaccuracies during operation can compromise the symmetry between these points. This inconsistency leads to workpiece wobbling and displacement during subsequent processing, affecting machining accuracy and quality, increasing defect rates, and reducing production efficiency. This invention addresses this issue by using four sets of clamping plates that simultaneously approach and position themselves against the workpiece's sidewall under the same power. This allows for four-point positioning of the workpiece in a single operation, ensuring pairwise symmetry between the clamping points and preventing workpiece wobbling and displacement caused by asymmetrical positioning. This further guarantees the accuracy and quality of subsequent workpiece processing, improving finished product efficiency and overall production productivity.
[0022] Second, the two sets of driving rods on the left and right sides of this utility model can move in coordination under the drive of the same driving force source, thereby ensuring that all clamping plate components connected to them can achieve synchronous displacement. This ensures that the two sets of clamping plates on the left and right sides exhibit a high degree of synchronicity during the driving process. This synchronicity can effectively avoid positioning deviations caused by asynchronous driving for the positioning operation of the four sets of clamping plates acting together on the workpiece body, improve the accuracy and synchronicity of the positioning of the workpiece body by the four sets of clamping plates, and provide a solid foundation for the subsequent precise processing of the workpiece body. It ensures that the workpiece body is always in a stable and accurate position throughout the entire processing flow, meeting the stringent requirements of high-precision processing for workpiece positioning.
[0023] Third, by setting screws, moving blocks, and driving arms, this utility model can cause the left and right sets of moving rods to move relative to each other or towards each other at the same time, thereby causing the left and right sets of clamping plates to be positioned on the side wall of the workpiece body at the same time. Through this precise and synchronous positioning method, not only is the accuracy and efficiency of positioning the workpiece body ensured, but also a stable and reliable foundation is provided for subsequent processing operations of the workpiece body, effectively guaranteeing the accuracy and quality requirements of the entire processing flow.
[0024] IV. By setting up a base, a sliding groove, and a guide rod, this utility model can make the two sets of corresponding moving arms move in the same forward and backward direction to the same degree, thereby ensuring that the two sets of corresponding clamping plates can be positioned or disengaged synchronously on the side wall of the workpiece body.
[0025] V. This utility model is equipped with a movable arm, a connecting seat, an extension arm, a socket and a positioning pin, which can move the position of the connecting seat relative to the movable arm, thereby adjusting the relative distance between the left and right sets of clamping plates, meeting the positioning and clamping requirements of workpieces of different lengths, and meeting the requirements of the fixture to perform multi-functional clamping of the workpiece body.
[0026] In summary, this utility model, through its four sets of clamping plates, can simultaneously approach and position themselves on the side wall of the workpiece body under the same power, achieving four-point positioning of the workpiece body in one go. Furthermore, the positioned points are symmetrical pairwise, ensuring the symmetry of the clamping points and preventing instability such as shaking or displacement of the workpiece body caused by asymmetry in the positioning points. This further guarantees the accuracy and quality of subsequent workpiece body processing, ensuring finished product efficiency and improving production efficiency. The left and right sets of drive rods can coordinate their displacement under the same driving force source, ensuring that all connected clamping plate components can achieve synchronous displacement. This effectively avoids positioning deviations caused by asynchronous driving, improving the accuracy and synchronicity of the four sets of clamping plates in positioning the workpiece body. This provides a solid foundation for the subsequent precise processing of the workpiece body, ensuring that the workpiece body remains in a stable and precise position throughout the entire processing flow, meeting the stringent requirements of high-precision machining for workpiece positioning. In addition, the relative distance between the left and right sets of clamping plates is adjustable to meet the positioning and clamping needs of workpiece bodies of different lengths, satisfying the need for multi-functional clamping of the workpiece body by the fixture. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the base of this utility model;
[0028] Figure 2 This is a top view of the drive rod of this utility model.
[0029] Figure 3 This is a schematic diagram of the structure of the base of this utility model;
[0030] Figures 1 to 3 In the middle, 1. base, 3. seat body, 4. slide groove, 5. guide rod, 6. moving arm, 7. clamping plate, 8. drive rod, 9. moving plate, 10. limit seat, 11. moving rod, 12. drive arm, 13. moving block, 14. support seat, 15. screw, 16. handwheel, 17. extension arm, 18. connecting seat, 19. insertion hole, 20. positioning pin, 21. support leg, 22. workpiece body. Detailed Implementation
[0031] The following are specific implementation cases and appendices. Figures 1 to 3 The present invention will be further described below, but the present invention is not limited to these embodiments.
[0032] See Figures 1 to 3As shown, a multi-functional workpiece machining fixture includes a base 1. Two sets of positioning components are symmetrically arranged on the upper surface of the base 1. These positioning components position the workpiece before and during machining. Each positioning component includes a seat 3 fixedly mounted on the upper surface of the base 1. A limit seat 10 is fixedly mounted on the seat 3. A moving rod 11 is horizontally extended through the limit seat 10. The limit seat 10 limits the movement of the moving rod 11, ensuring that the moving rod 11 always moves horizontally. A movable rod is mounted on the side of the moving rod 11 near the middle of the base 1. The movable plate 9 is perpendicular to the movable rod 11. The front and rear ends of the movable plate 9 are respectively connected to the drive rod 8 by a pin. The end of the drive rod 8 away from the movable plate 9 is connected to the movable arm 6 by a pin. The movable arm 6 is slidably arranged along the length direction of the base 3. The side of the movable arm 6 away from the base 3 is connected to the connecting seat 18. The side wall of the connecting seat 18 is equipped with a clamping plate 7. The two clamping plates 7 corresponding to the front and rear positions are symmetrically arranged. The workpiece body 22 is positioned between the four sets of clamping plates 7. The side wall of the workpiece body 22 is clamped and positioned by the four sets of clamping plates 7.
[0033] The movement of the moving rod 11 can drive the moving plate 9 to move, thereby driving the connecting seat 18 and the moving arm 6 to move synchronously, so as to realize that the two sets of clamping plates 7 corresponding to the front and rear can move synchronously in opposite directions. The movement in opposite directions can realize the clamping and positioning of the workpiece at the corresponding positions in the front and rear.
[0034] This utility model, through the setting of four sets of clamping plates 7, can simultaneously approach and position the workpiece sidewall under the same power action, that is, it can achieve four-point positioning of the workpiece in one go, and the positioning points can be symmetrical in pairs, ensuring the symmetry of the workpiece clamping points after positioning, avoiding unstable phenomena such as workpiece shaking and displacement caused by asymmetry of workpiece positioning points, and further ensuring the accuracy and quality of subsequent workpiece processing, ensuring finished product efficiency, and improving production efficiency.
[0035] Main references Figure 3 As shown, the movable arm 6 is slidably connected to the base 3 via a sliding assembly; the sliding assembly includes a groove 4 opened on the side wall of the base 3, and a guide rod 5 is installed in the groove 4 from front to back. The movable arm 6 is slidably sleeved on the guide rod 5 and slidably embedded in the groove 4; during the movement of the movable arm 6, it can move along the guide rod 5 and the inner cavity of the groove 4, so that the movement of the movable arm 6 is always kept in the front-back direction.
[0036] Main references Figure 1 and Figure 2As shown, the two moving rods 11 move in opposite or opposite directions via a drive unit: the drive unit includes two support seats 14 mounted on the left and right side walls of the base 1, and a screw 15 is rotatably connected between the two support seats 14. The screw 15 is provided with symmetrical external threads on the left and right sides. Two moving blocks 13 are threaded on the left and right sides of the screw 15 respectively, and a drive arm 12 is vertically mounted on the front side wall of each moving block 13; wherein, the drive arm 12 is vertically connected to the moving rod 11; the two moving blocks 13 are symmetrically arranged with respect to the screw 15 to ensure that when the two moving blocks 13 move, they can drive the [12, moving rod 11 to move symmetrically; the right end of the screw 15 extends out of the outer wall of the right support seat 14 and is equipped with a handwheel 16. By driving the handwheel 16 to rotate, the screw 15 can be rotated;
[0037] By rotating the drive handwheel 16, the screw 15 is rotated, which in turn causes the two sets of moving blocks 13 to move outward along the screw 15. This causes the two sets of drive arms 12 and moving rods 11 to move in a horizontal direction away from the base 1. At this time, the two sets of moving plates 9 move outward, causing one end of the two sets of drive rods 8 in their respective positions to move in a horizontal direction away from the base 1. By setting the screw 15, moving blocks 13, and drive arms 12, the left and right sets of moving rods 11 can be made to move relative to each other or towards each other at the same time. This causes the left and right sets of clamping plates 7 to be positioned on the side wall of the workpiece body 22 at the same time. Through this precise and synchronous positioning method, not only is the accuracy and efficiency of positioning the workpiece body 22 ensured, but also a stable and reliable foundation is provided for the subsequent processing operation of the workpiece body 22, which effectively guarantees the accuracy and quality requirements of the entire processing flow.
[0038] Main references Figure 3 As shown, an adjustment assembly is provided between the movable arm 6 and the connecting seat 18: the adjustment assembly includes an extension arm 17 that is slidably inserted into the movable arm 6, the extension arm 17 is fixedly connected to the connecting seat 18, and a plurality of insertion holes 19 are equally spaced on the extension arm 17. A positioning pin 20 is provided through the movable arm 6 from top to bottom, and the bottom end of the positioning pin 20 extends into the inner cavity of one of the insertion holes 19.
[0039] When the length of the workpiece body 22 decreases, the positions of the four sets of clamping plates 7 need to be adjusted to match the length of the workpiece body 22: the positioning pin 20 is disengaged upward from the corresponding insertion hole 19 cavity, the extension arm 17 is moved along the inner cavity of the moving arm 6 to adjust the total length of the moving arm 6 and the connecting seat 18, so that the distance between the clamping plates 7 in the left and right positions is adjusted, so that each clamping plate 7 can be evenly located on the side wall of the workpiece body 22 to meet the positioning requirements of the side wall of the workpiece body 22. Then the positioning pin 20 is reinserted into the corresponding insertion hole 19 cavity to realize the adjustment of the distance between the moving arm 6 and the extension arm 17 after the relative position adjustment, as well as the positioning after adjustment.
[0040] In addition, four support legs 21 are installed at the four corners of the bottom of the base 1. With the help of the four sets of support legs 21, the base 1 can be lifted off the ground, so that the base 1 has a sufficient height distance from the ground, so that personnel can carry out processing work on the workpiece body 22 above the base 1.
[0041] It is worth noting that in this application, the screw 15 is a self-locking screw that is available on the market. It can self-lock when it stops rotating and will not be affected by external forces to rotate. The outer wall of the screw 15 is provided with external threads that are symmetrical and opposite in direction. It adopts a commonly used model on the market. The model of the above-mentioned existing parts will not be limited or described in detail here.
[0042] The working principle of a multi-functional workpiece machining fixture in this embodiment is as follows:
[0043] When clamping and positioning the workpiece body 22, the workpiece body 22 is placed between four sets of clamping plates 7. The drive handwheel 16 is rotated to drive the screw 15 to rotate, which in turn causes the two sets of moving blocks 13 to move outward along the screw 15. This causes the two sets of drive arms 12 and moving rods 11 to move in a horizontal direction away from the base 1. At this time, the two sets of moving plates 9 move outward, causing one end of the two sets of drive rods 8 at their respective positions to move in a horizontal direction away from the base 1. This causes the other end of the drive rods 8 to drive the moving arm 6, extension arm 17, and connecting seat 18 to move synchronously towards the side wall of the workpiece body 22. This causes the corresponding clamping plates 7 to gradually approach the side wall of the workpiece body 22, ultimately achieving the clamping and positioning of the workpiece body 22.
[0044] During the movement of the movable arm 6, it can move along the guide rod 5 and the inner cavity of the slide 4, so that the movement of the movable arm 6 always remains in the front-back direction.
[0045] In summary, this utility model, through the arrangement of four sets of clamping plates 7, can simultaneously approach and position themselves on the side wall of the workpiece body 22 under the same power action. This allows for four-point positioning of the workpiece body 22 in one operation, with each positioning point being symmetrical. This ensures the symmetry of the clamping points on the workpiece body 22 after positioning, preventing instability such as shaking or displacement of the workpiece body 22 caused by asymmetry in the positioning points. Furthermore, it guarantees the accuracy and quality of subsequent processing of the workpiece body 22, ensuring finished product efficiency and improving production efficiency. The left and right sets of drive rods 8 can coordinate their displacement movement under the same driving force source, thereby ensuring… All the clamping plates 7 connected to it can achieve synchronous displacement, which can effectively avoid positioning deviation caused by asynchronous driving, improve the accuracy and synchronization of the positioning of the workpiece body 22 by the four sets of clamping plates 7, and provide a solid foundation for the subsequent precise machining of the workpiece body 22. It ensures that the workpiece body 22 is always in a stable and accurate position throughout the entire machining process, meeting the stringent requirements of high-precision machining for workpiece positioning. In addition, the relative distance between the left and right sets of clamping plates 7 can be adjusted to meet the positioning and clamping requirements of workpiece bodies 22 of different lengths, and meet the multi-functional clamping requirements of the fixture for the workpiece body 22.
[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A multifunctional fixture for machining workpieces, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with two groups of positioning components symmetrically left and right; Each group of the positioning components comprises a seat body (3) fixedly installed on the upper surface of the base (1), a limiting seat (10) fixedly installed on the seat body (3), a moving rod (11) penetratingly provided on the limiting seat (10) in the horizontal direction, a moving plate (9) installed on the side of the moving rod (11) close to the middle of the base (1), and the moving plate (9) is provided perpendicularly to the moving rod (11), two drive rods (8) rotatably connected to the front and rear ends of the moving plate (9), a moving arm (6) rotatably connected to the end of the drive rod (8) away from the moving plate (9), the moving arm (6) is slidingly provided along the length direction of the seat body (3), a connecting seat (18) connected to the side of the moving arm (6) away from the seat body (3), and a clamping plate (7) installed on the side wall of the connecting seat (18). The two clamping plates (7) corresponding to the front and rear positions are symmetrically arranged.
2. The multifunctional fixture for workpiece machining according to claim 1, characterized in that: The moving arm (6) is slidingly connected to the seat body (3) through a sliding assembly. The sliding assembly comprises a sliding groove (4) formed in the side wall of the seat body (3), a guide rod (5) installed in the sliding groove (4) from front to back, and the moving arm (6) is slidingly sleeved on the guide rod (5) and slidingly embedded in the sliding groove (4).
3. The multifunctional fixture for workpiece machining according to claim 1, characterized in that: The left and right moving rods (11) are moved in opposite or same directions through a driving unit. The driving unit comprises two support seats (14) installed on the left and right side walls of the base (1), a screw rod (15) rotatably connected between the two support seats (14), outer threads symmetrically provided on the screw rod (15), two moving blocks (13) threadedly sleeved on the left and right sides of the screw rod (15), and a drive arm (12) perpendicularly installed on the front side wall of each moving block (13). The drive arm (12) is perpendicularly connected to the moving rod (11).
4. The multifunctional fixture for workpiece machining according to claim 3, characterized in that: The two moving blocks (13) are symmetrically arranged relative to the screw rod (15).
5. The multifunctional fixture for workpiece machining according to claim 3, characterized in that: The right end of the screw rod (15) extends out of the outer wall of the right support seat (14) and is provided with a hand wheel (16).
6. The multifunctional fixture for workpiece machining according to claim 1, characterized in that: An adjusting assembly is arranged between the moving arm (6) and the connecting seat (18). The adjusting assembly comprises an extension arm (17) slidingly inserted into the moving arm (6), the extension arm (17) is fixedly connected to the connecting seat (18), a plurality of insertion holes (19) are equidistantly formed on the extension arm (17), a positioning pin (20) penetratingly provided in the moving arm (6) from top to bottom, and the bottom end of the positioning pin (20) extends into the inner cavity of one of the insertion holes (19).
7. The multifunctional fixture for workpiece machining according to claim 1, characterized in that: The base (1) is provided with four supporting legs (21) at the bottom corners.
8. The multifunctional fixture for workpiece machining according to claim 1, characterized in that: Four groups of the clamping plates (7) are positioned with a workpiece body (22).
Citation Information
Patent Citations
A multi-functional fixture for workpiece machining
CN218801493U