A clamping tool

Abstract

The utility model relates to the technical field of frock, disclose a kind of clamping frock, including first clamping component, the first clamping component has the first clamping groove for fixing workpiece;Second clamping component, the second clamping component has the second clamping groove for fixing workpiece;Compression component, the compression component includes the compression plate of liftablely being arranged between the first clamping component and second clamping component, the compression plate both ends respectively extend to the above of the first clamping groove and second clamping groove, and the compression plate can rotate relative to the first clamping groove and second clamping groove.The utility model's advantage lies in, simple structure, can realize multi-station synchronous compression.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and in particular to a clamping tool. Background Technology

[0002] Traditional clamping fixtures typically use a single clamping component, which can only fix a single workpiece, making it difficult to meet the clamping requirements of multi-station synchronous processing or workpieces with complex geometries. To improve efficiency, existing technologies use a solution of adding multiple clamping components, but this requires configuring an independent clamping mechanism for each clamping component, which not only complicates the overall structure but also increases manufacturing costs. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a clamping fixture with a simple structure that can realize synchronous clamping at multiple stations.

[0004] The technical solution adopted by this utility model to solve its technical problem is to provide a clamping fixture, including:

[0005] A first clamping assembly, the first clamping assembly having a first clamping groove for fixing a workpiece;

[0006] The second clamping assembly has a second clamping groove for fixing the workpiece;

[0007] A clamping assembly includes a clamping plate that is vertically and flexibly disposed between the first clamping assembly and the second clamping assembly. The two ends of the clamping plate extend above the first clamping groove and the second clamping groove, respectively, and the clamping plate is rotatable relative to the first clamping groove and the second clamping groove.

[0008] In one of the clamping fixtures described above, the clamping assembly includes a first driving member, the output end of which is detachably connected to the clamping plate and can drive the clamping plate to perform lifting and rotating movements relative to the first clamping groove and the second clamping groove.

[0009] In one of the clamping fixtures described above, the clamping plate includes a connecting portion, and the connecting portion is provided with a positioning groove, wherein the output end of the first driving member can be detachably inserted into the positioning groove.

[0010] In the above-mentioned clamping fixture, the positioning groove vertically penetrates the connecting part, the connecting part is provided with a first fixing hole communicating with the positioning groove, the output end of the first driving member is provided with a second fixing hole corresponding to the first fixing hole, and a locking member is detachably inserted into the first fixing hole and the second fixing hole.

[0011] In one of the clamping fixtures described above, a sealing plate is detachably provided on the connecting part. The sealing plate is located above the positioning groove, and the projection of the sealing plate in the vertical direction can cover the positioning groove.

[0012] In the aforementioned clamping fixture, a rotating base is included. The first clamping assembly, the second clamping assembly, and the clamping assembly are detachably mounted on the rotating base, and the rotating base can drive the first clamping assembly, the second clamping assembly, and the clamping assembly to rotate synchronously around a horizontal axis.

[0013] In the aforementioned clamping fixture, the rotating seat includes a horizontally arranged rotating plate and rotating disks disposed at both ends of the rotating plate. The first clamping assembly and the second clamping assembly are arranged in a mirror image on the rotating plate, and the clamping assembly is located on the center line between the first clamping assembly and the second clamping assembly.

[0014] In the above-mentioned clamping fixture, the first clamping component and the second clamping component have the same structure, both including a positioning base and a first clamping structure and a second clamping structure detachably disposed on the positioning base. The first clamping structure and the second clamping structure are arranged opposite to each other and together with the positioning base to form corresponding first clamping grooves and second clamping grooves.

[0015] In the above-mentioned clamping fixture, the positioning base is provided with a first positioning block and a second positioning block arranged opposite to each other. The first positioning block and the second positioning block cooperate to form a workpiece placement groove, and a third positioning block is detachably provided between the first positioning block and the second positioning block. The first positioning block, the second positioning block and the third positioning block are provided with mutual aligned and connected clearance grooves.

[0016] In the above-mentioned clamping fixture, the first clamping structure and the second clamping structure have the same structure, both including a second driving member and a clamping block. The clamping block is detachably disposed on the output end of the second driving member, and the positioning base is also provided with a guide groove. The clamping block is provided with a guide post that can be movably extended into the guide groove.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. In this utility model, by setting a first clamping component and a second clamping component, and setting a liftable and rotatable pressure plate between them, the pressure plate can simultaneously clamp and fix the workpieces in the two clamping slots, thereby realizing the simultaneous clamping and clamping of multiple workpieces. Compared with the traditional fixture design that requires a separate pressure mechanism for each clamping component, this effectively simplifies the overall structure, reduces the number of parts, lowers manufacturing and maintenance costs, and improves clamping efficiency and equipment integration.

[0019] 2. In this utility model, the clamping assembly includes a first driving member. The output end of the first driving member is detachably connected to the clamping plate and can drive the clamping plate to perform lifting and rotating movements relative to the first clamping groove and the second clamping groove. This design, on the one hand, realizes the automated control of the lifting and rotating movements of the clamping plate through a single first driving member, and on the other hand, enhances the stability and reliability of the clamping process, which is beneficial to improving processing accuracy and production cycle time.

[0020] 3. In this utility model, the first clamping structure and the second clamping structure have the same structure, both including a second driving member and a clamping block. The clamping block is detachably mounted on the output end of the second driving member, and the positioning base is also provided with a guide groove. The clamping block is provided with a guide post that can be movably extended into the guide groove. This design not only improves the stability and guiding accuracy of the clamping block during movement, but also ensures the repeatability and positioning accuracy of the clamping action, making it suitable for high-precision clamping and automated application scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a clamping tool according to the present invention.

[0022] Figure 2 This is an exploded view of a clamping fixture according to the present invention.

[0023] Figure 3 This is an exploded view of the clamping component in this utility model.

[0024] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0025] 100. First clamping assembly; 101. First clamping groove; 110. Positioning base; 111. First positioning block; 112. Second positioning block; 113. Workpiece placement groove; 114. Third positioning block; 115. Clearance groove; 116. Guide groove; 117. Adjustment hole; 120. First clamping structure; 121. Second driving component; 122. Clamping block; 123. Guide post; 130. Second clamping structure; 200. Second clamping assembly; 201. Second clamping groove; 300. Pressing assembly; 310. Pressing plate; 311. Connecting part; 312. Positioning groove; 313. First fixing hole; 320. First driving component; 321. Second fixing hole; 330. Locking component; 340. Sealing plate; 400. Rotary seat; 410. Rotary plate; 420. Rotating disk; 500. Load-bearing base plate; 600. Workpiece. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] Furthermore, 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 that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" 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 components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] 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.

[0031] like Figures 1 to 3 As shown, in this embodiment, a clamping fixture includes:

[0032] The first clamping assembly 100 has a first clamping groove 101 for fixing the workpiece 600;

[0033] The second clamping assembly 200 has a second clamping groove 201 for fixing the workpiece 600;

[0034] The clamping assembly 300 includes a clamping plate 310 that is vertically and flexibly disposed between the first clamping assembly 100 and the second clamping assembly 200. Both ends of the clamping plate 310 extend above the first clamping groove 101 and the second clamping groove 201, respectively, and the clamping plate 310 is rotatable relative to the first clamping groove 101 and the second clamping groove 201. This design allows the clamping plate 310 to simultaneously clamp and fix the workpieces 600 within the first clamping groove 101 and the second clamping groove 201, thereby achieving simultaneous clamping and clamping of multiple workpieces 600. Compared to traditional fixtures that require a separate clamping mechanism for each clamping assembly, this design effectively simplifies the overall structure, reduces the number of parts, lowers manufacturing and maintenance costs, and simultaneously improves clamping efficiency and equipment integration.

[0035] like Figures 1 to 3 As shown, in this embodiment, the clamping fixture is used to position and clamp the workpiece 600 to ensure that the workpiece 600 maintains a stable position during machining processes such as drilling and tapping. This clamping fixture has a reasonable structure and is easy to operate, effectively improving the clamping efficiency and machining accuracy of the workpiece 600. It is suitable for clamping needs in automated production lines or CNC machining equipment.

[0036] In this embodiment, the clamping fixture includes a first clamping assembly 100, a second clamping assembly 200, a pressing assembly 300, a rotating seat 400, and a load-bearing base plate 500.

[0037] Furthermore, the load-bearing base plate 500 is a rectangular plate structure arranged horizontally, serving as the basic support platform for the entire clamping fixture. Its main function is to provide a stable foundation for installing other components and to ensure the stability and reliability of the entire device during use.

[0038] Furthermore, the rotating base 400 is detachably fixed to the load-bearing base plate 500 by fasteners (such as screws or bolts) and serves as the mounting base for the first clamping assembly 100, the second clamping assembly 200, and the clamping assembly 300, supporting and driving the first clamping assembly 100, the second clamping assembly 200, and the clamping assembly 300 to rotate synchronously around a horizontal axis. This design allows the workpiece 600 in the clamped state to complete multi-angle adjustments without releasing the clamp, thereby enabling multi-faceted machining without repeated clamping, improving machining efficiency and positioning consistency.

[0039] Furthermore, the rotating base 400 includes a rotating plate 410, a rotating disk 420, and a rotating motor (not shown in the figure). The rotating plate 410 has a rectangular plate structure and is arranged vertically parallel to the load-bearing base plate 500, and is used to support the first clamping assembly 100, the second clamping assembly 200, and the pressing assembly 300.

[0040] Preferably, the length of the rotating plate 410 is less than the length of the load-bearing base plate 500, so as to reserve installation space for the rotating disk 420.

[0041] Furthermore, two rotating disks 420 are respectively disposed at both ends of the rotating plate 410 and connected to the support components on the load-bearing base plate 500 through bearings or rotating shaft structures. A rotating motor is connected to one of the rotating disks 420, thereby realizing the overall rotation function of the rotating plate 410 and its clamping components.

[0042] In this embodiment, the first clamping assembly 100, the second clamping assembly 200 and the pressing assembly 300 are detachably mounted on the rotating plate 410 of the rotating seat 400 by fasteners, which facilitates quick replacement or adjustment according to different processing requirements and improves the flexibility and applicability of the clamping fixture.

[0043] Furthermore, the first clamping assembly 100 and the second clamping assembly 200 are arranged in a mirror-symmetrical manner along the width direction of the rotating plate 410. This design not only helps the overall structure maintain balance under stress, reducing vibration or deformation caused by off-center loading, but also facilitates the simultaneous clamping and positioning of multiple workpieces 600, improving clamping efficiency and processing consistency.

[0044] Preferably, multiple first clamping assemblies 100 and second clamping assemblies 200 are provided and arranged at equal intervals along the length of the rotating plate 410. This design not only has a regular structure and facilitates processing and assembly, but also effectively increases the number of workpieces 600 that can be processed simultaneously, thereby significantly improving overall processing efficiency. In addition, users can selectively activate different numbers of first clamping assemblies 100 and second clamping assemblies 200 according to actual processing needs, meeting the flexible configuration requirements under different batch production scenarios.

[0045] In this embodiment, the first clamping assembly 100 and the second clamping assembly 200 are independent of each other. The first clamping assembly 100 has a first clamping groove 101 for fixing the workpiece 600, and the second clamping assembly 200 has a second clamping groove 201 for fixing the workpiece 600, so as to realize the positioning and clamping of different workpieces 600.

[0046] Furthermore, the first clamping assembly 100 and the second clamping assembly 200 have the same structure, both including a positioning base 110 and a first clamping structure 120 and a second clamping structure 130 detachably disposed on the positioning base 110. The first clamping structure 120 and the second clamping structure 130 are arranged opposite to each other and together with the positioning base 110 form corresponding first clamping grooves 101 and second clamping grooves 201. This design not only improves the versatility and interchangeability of the clamping assemblies, but also helps to reduce manufacturing costs, simplify the assembly process, and facilitate subsequent maintenance. At the same time, the detachable clamping structure design also facilitates the quick replacement of clamping modules according to different workpiece shapes or sizes, improving the flexibility and adaptability of the clamping fixture.

[0047] Furthermore, the positioning base 110 is in the shape of a boss, on which a first positioning block 111 and a second positioning block 112 are arranged opposite to each other. The first positioning block 111 and the second positioning block 112 are located in the middle of the positioning base 110 and extend upward in the vertical direction. The first positioning block 111 and the second positioning block 112 cooperate to form two sets of left-right symmetrical rectangular workpiece placement slots 113, which are used to achieve the initial positioning and support of the workpiece 600, so that the workpiece 600 can be stably clamped by the first clamping structure 120 and the second clamping structure 130, thereby facilitating drilling, tapping and other processing operations on the upper surface of the workpiece 600.

[0048] Furthermore, a horizontally arranged third positioning block 114 is detachably provided between the first positioning block 111 and the second positioning block 112. The third positioning block 114 is perpendicular to the workpiece placement groove 113 and forms a snap-fit ​​engagement with the workpiece 600, thereby providing support and limiting for the middle part of the n-shaped workpiece 600. This design not only pre-fixes the workpiece 600 during installation, improving clamping efficiency and stability, but also effectively prevents the workpiece 600 from bending or undergoing local deformation during subsequent drilling, tapping, and other processing, thereby improving processing accuracy and finished product qualification rate. Preferably, the third positioning block 114 is detachably connected to the positioning base 110 body via fasteners. This design facilitates flexible configuration according to the type of workpiece 600, enhancing the versatility and adaptability of the clamping components, and also improves the convenience of disassembly, assembly, and maintenance.

[0049] Furthermore, the first positioning block 111, the second positioning block 112, and the third positioning block 114 are provided with mutually aligned and interconnected clearance grooves 115. This design provides a spatial channel for the tool to perform drilling or tapping operations from the side of the workpiece 600, avoiding interference of the clamping structure with the machining path, thereby achieving efficient machining of the workpiece in more than 600 directions. This structure is particularly suitable for automated machining scenarios that require simultaneous completion of multiple angles and multiple processes.

[0050] Preferably, the first positioning block 111 or the second positioning block 112 is provided with an adjustment hole 117 communicating with the workpiece placement groove 113. A threaded rod (not shown in the figure) is inserted into the adjustment hole 117. By adjusting the insertion depth of the threaded rod in the adjustment hole 117, the effective width of the workpiece placement groove 113 can be adjusted, thereby achieving adaptive clamping of workpieces 600 of different sizes. This design not only improves the compatibility of the clamping assembly with workpieces 600 of various specifications, but also enhances the fit and stability during the clamping process, avoiding clamping offset or machining errors caused by gaps between the workpiece 600 and the clamping groove.

[0051] In this embodiment, the first clamping structure 120 and the second clamping structure 130 are symmetrically arranged on both sides of the first positioning block 111 and the second positioning block 112, and the first clamping structure 120 and the second clamping structure 130 have the same structure, both including the second driving member 121 and the clamping block 122. The clamping block 122 is detachably disposed on the output end of the second driving member 121 to improve the convenience of disassembly, assembly and maintenance.

[0052] Furthermore, the second driving component 121 is a linear motor, which is detachably fixed to the positioning base 110 by fasteners. The clamping block 122 is arranged opposite to the workpiece placement groove 113 and is threadedly connected to the output end of the second driving component 121. When the clamping block 122 abuts against the outer wall of the first positioning block 111 and the second positioning block 112, it can cooperate with the workpiece placement groove 113 to form the corresponding first clamping groove 101 and the second clamping groove 201, thereby achieving stable clamping of the workpiece 600.

[0053] Furthermore, the positioning base 110 is provided with a cylindrical guide groove 116, and the clamping block 122 is provided with a guide post 123 that can be movably extended into the guide groove 116. This design not only improves the stability and guiding accuracy of the clamping block 122 during movement, but also ensures the repeatability of the clamping action, making it suitable for high-precision clamping and automated application scenarios.

[0054] To prevent the workpiece 600 from shifting vertically due to force during side drilling or tapping, thereby detaching from the workpiece placement slot 113 and affecting machining accuracy and safety, a clamping assembly 300 is provided in this embodiment. This clamping assembly 300 is detachably mounted to the rotating plate 410 of the rotating base 400 by bolts, allowing for flexible adjustment of its position or replacement of clamping modules of different specifications according to clamping requirements.

[0055] Preferably, the clamping component 300 is located on the center line between the first clamping component 100 and the second clamping component 200 to ensure that the pressure it applies to the two clamping areas is evenly distributed, thereby further improving the stability of clamping.

[0056] Furthermore, the clamping assembly 300 includes a clamping plate 310 and a first driving member 320. The clamping plate 310 is horizontally and vertically positioned between the first clamping assembly 100 and the second clamping assembly 200. Both ends of the clamping plate 310 extend above the first clamping groove 101 and the second clamping groove 201, respectively, to simultaneously apply clamping force to the workpieces 600 within the two clamping grooves. The clamping plate 310 can rotate relative to the first clamping groove 101 and the second clamping groove 201, thereby switching between a clamping state and a releasing state, facilitating the rapid loading and unloading of the workpieces 600. This design allows a single clamping plate 310 to simultaneously clamp and fix multiple workpieces 600 within multiple clamping grooves, significantly reducing the number of clamping assemblies 300 required in traditional fixtures, simplifying the overall structural layout, reducing manufacturing and maintenance costs, and improving the space utilization and ease of operation of the equipment.

[0057] Furthermore, the first driving component 320 is a rotary lifting electric cylinder, vertically arranged on the rotating plate 410, and detachably connected to the rotating plate 410 by fasteners. The output end of the first driving component 320 is detachably connected to the clamping plate 310, and can drive the clamping plate 310 to perform lifting and rotating movements relative to the first clamping groove 101 and the second clamping groove 201, thereby realizing automated control of the clamping and releasing actions. This design, on the one hand, realizes automated control of the lifting and rotating actions of the clamping plate 310 through a single first driving component 320, and on the other hand, enhances the stability and reliability of the clamping process, which is beneficial to improving processing accuracy and production cycle time.

[0058] Furthermore, the clamping plate 310 includes a connecting portion 311 located in the middle, and a positioning groove 312 is provided on the connecting portion 311. The output end of the first driving member 320 extends vertically into the positioning groove 312 detachably, so as to realize quick assembly and disassembly between the clamping plate 310 and the first driving member 320. This design not only facilitates the replacement and maintenance of the clamping plate 310, but also improves the adaptability of the clamping fixture to different processing requirements. For example, when dealing with workpieces 600 of different shapes or sizes, diverse clamping requirements can be met by replacing the clamping plate 310 with different structural forms, significantly improving the versatility and flexibility of the fixture.

[0059] Furthermore, the positioning groove 312 is waist-shaped and vertically penetrates the connecting part 311, so that the output end of the first driving member 320 can be inserted vertically and detachably connected. The connecting part 311 is provided with a first fixing hole 313 arranged horizontally and communicating with the positioning groove 312, and the output end of the first driving member 320 is correspondingly provided with a matching second fixing hole 321. When the output end is inserted into the positioning groove 312, the first fixing hole 313 and the second fixing hole 321 are aligned and fixed by a detachable locking member 330 (such as a pin, bolt or quick-change pin) inserted into the first fixing hole 313 and the second fixing hole 321, thereby achieving a stable connection between the clamping plate 310 and the first driving member 320. This design not only ensures the connection stability of the clamping plate 310 during lifting and rotation, but also allows operators to quickly replace different types of clamping plates 310 as needed, improving the flexibility and maintenance convenience of the clamping fixture.

[0060] Preferably, the first fixing hole 313 extends horizontally through the connecting part 311 and communicates with the positioning groove 312, so that the locking member 330 can be inserted from both sides of the connecting part 311, which further improves the convenience of assembly and the firmness of locking.

[0061] In this embodiment, the clamping plate 310 can be U-shaped or rectangular at both ends to clamp the workpieces 600 in the two workpiece placement slots 113. When the clamping plate 310 is rectangular at both ends, it is provided with through holes to reduce the overall weight of the clamping plate 310 without affecting its structural strength and clamping performance.

[0062] In this embodiment, a sealing plate 340 is detachably provided on the connecting portion 311. The sealing plate 340 is located directly above the positioning groove 312, and its vertical projection covers the positioning groove 312. Preferably, the sealing plate 340 is fixed to the connecting portion 311 by fasteners. This design effectively prevents dust, chips, or other impurities generated during processing from entering the positioning groove 312, thereby avoiding affecting the assembly accuracy and connection stability between the clamping plate 310 and the first driving member 320.

Claims

1. A clamping fixture, characterized in that, include: A first clamping assembly, the first clamping assembly having a first clamping groove for fixing a workpiece; The second clamping assembly has a second clamping groove for fixing the workpiece; A clamping assembly includes a clamping plate that is vertically and flexibly disposed between the first clamping assembly and the second clamping assembly. The two ends of the clamping plate extend above the first clamping groove and the second clamping groove, respectively, and the clamping plate is rotatable relative to the first clamping groove and the second clamping groove.

2. The clamping fixture according to claim 1, characterized in that, The clamping assembly includes a first driving member, the output end of which is detachably connected to the clamping plate and can drive the clamping plate to perform lifting and rotating movements relative to the first clamping groove and the second clamping groove.

3. The clamping fixture according to claim 2, characterized in that, The clamping plate includes a connecting part, and the connecting part is provided with a positioning groove, the output end of the first driving member can be detachably extended into the positioning groove.

4. A clamping fixture according to claim 3, characterized in that, The positioning groove extends vertically through the connecting part. The connecting part is provided with a first fixing hole that communicates with the positioning groove. The output end of the first driving member is provided with a second fixing hole that corresponds to the first fixing hole. Locking members are detachably inserted into the first fixing hole and the second fixing hole.

5. A clamping fixture according to claim 4, characterized in that, A sealing plate is detachably provided on the connecting part. The sealing plate is located above the positioning groove, and the projection of the sealing plate in the vertical direction can cover the positioning groove.

6. A clamping fixture according to claim 1, characterized in that, The device includes a rotating base, on which the first clamping assembly, the second clamping assembly, and the pressing assembly are detachably mounted, and the rotating base can drive the first clamping assembly, the second clamping assembly, and the pressing assembly to rotate synchronously around a horizontal axis.

7. A clamping fixture according to claim 6, characterized in that, The rotating seat includes a horizontally arranged rotating plate and rotating disks at both ends of the rotating plate. The first clamping assembly and the second clamping assembly are arranged in a mirror image on the rotating plate, and the pressing assembly is located on the center line between the first clamping assembly and the second clamping assembly.

8. A clamping fixture according to claim 1, characterized in that, The first clamping assembly and the second clamping assembly have the same structure, both including a positioning base and a first clamping structure and a second clamping structure detachably disposed on the positioning base. The first clamping structure and the second clamping structure are arranged opposite to each other and together with the positioning base to form corresponding first clamping grooves and second clamping grooves.

9. A clamping fixture according to claim 8, characterized in that, The positioning base is provided with a first positioning block and a second positioning block arranged opposite to each other. The first positioning block and the second positioning block cooperate to form a workpiece placement groove, and a third positioning block is detachably provided between the first positioning block and the second positioning block. The first positioning block, the second positioning block and the third positioning block are provided with mutual aligned and connected clearance grooves.

10. A clamping fixture according to claim 9, characterized in that, The first clamping structure and the second clamping structure have the same structure, both including a second driving member and a clamping block. The clamping block is detachably disposed on the output end of the second driving member, and the positioning base is also provided with a guide groove. The clamping block is provided with a guide post that can be movably extended into the guide groove.

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