Clamp and machining system

Abstract

The utility model relates to a clamp and a machining system, the clamp comprises a base frame, a positioning assembly and a fixing assembly, and one end of the base frame is suitable for being connected with an external driving device; the positioning assembly is arranged on the base frame and forms a containing cavity together with the base frame, and the containing cavity is suitable for containing a to-be-machined workpiece; the fixing assembly is suitable for fixing the positioning assembly and the base frame. Wherein the clamp has a machining state that the clamp is driven by an external driving device to rotate along the axis, and in the machining state, the base frame abuts against the to-be-machined part in a face-to-face mode, and the positioning assembly abuts against the to-be-machined part in a face-to-face mode. The positioning assembly and the base frame jointly form the containing cavity, an effective positioning and fixing mode is provided, and it is guaranteed that the workpiece to be machined is kept stable in the machining process. In the machining state, the contact area is increased to the maximum extent through the face abutting design, jumping of the part prone to deformation in the machining process is effectively reduced, the risk of workpiece deformation caused by clamping of the clamp is effectively reduced, and the machining precision and stability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a clamp and a processing system. Background Art

[0002] With the rapid development of my country's machinery industry and the continuous improvement of the quantity and quality requirements of mechanical processing in various industries, the current mechanical processing is developing towards high speed and high precision. Therefore, modern processing technologies such as high-speed cutting have emerged. These modern mechanical industry processing technologies are generally inseparable from the assistance of clamping fixtures. To a certain extent, whether the clamping fixtures are advanced and applicable directly determines the accuracy and production speed of the processed objects.

[0003] In traditional machining processes, the design of fixtures mainly focuses on providing a strong clamping force and stable positioning function to ensure that the workpiece does not move during machining. With the improvement of product precision requirements and the increase in industrial automation levels, the existing structure of fixtures is gradually unable to meet the machining needs.

[0004] Existing fixture designs fail to provide adequate support, especially for easily deformable materials, whose softness makes them easily squeezed and deformed during processing, and the deviation of geometric tolerances becomes more significant during processing. This deformation may cause the parts to fail to meet the design requirements in the final assembly, resulting in functional failure. Utility Model Content

[0005] Based on this, it is necessary to provide a fixture and processing system to address the above problems.

[0006] The present application provides a clamp, which includes a base frame, a positioning assembly and a fixing assembly, wherein one end of the base frame is suitable for connection with an external driving device; the positioning assembly is arranged on the base frame and forms a receiving cavity together with the base frame, and the receiving cavity is suitable for receiving a workpiece to be processed; the fixing assembly is suitable for fixing the positioning assembly to the base frame.

[0007] The fixture has a processing state in which it rotates along the axis driven by an external driving device. In the processing state, the base frame is in surface contact with the workpiece to be processed, and the positioning assembly is in surface contact with the workpiece to be processed.

[0008] In one of the embodiments, the base frame includes a base plate and a clamping structure that are connected to each other. The clamping structure is arranged on a side where the base plate is connected to an external driving device. The clamping structure is suitable for clamping by an external driving device. The base plate is suitable for loading a workpiece to be processed. The clamping structure is coaxially arranged with the base plate.

[0009] In one embodiment, the positioning assembly includes a first positioning member, which is coaxially arranged with the substrate; the first positioning member is suitable for abutting against the outer edge of the workpiece to be processed away from the axis, and a first avoidance structure suitable for inserting a turning tool is provided at the axis of the first positioning member.

[0010] In one embodiment, the positioning assembly further includes a second positioning member, which is coaxially arranged with the substrate; the second positioning member is suitable for abutting against the axis of the workpiece to be processed, and the radial outer edge of the second positioning member is offset from the radial outer edge of the substrate.

[0011] In one of the embodiments, in the processing state, the first positioning member abuts against the workpiece to be processed or the second positioning member abuts against the workpiece to be processed.

[0012] In one embodiment, the fixing assembly includes a clamping member and a tensioning member, the clamping member includes a first structure suitable for abutting the substrate, a second structure suitable for abutting the first positioning member, and a third structure suitable for connecting the first structure and the second structure;

[0013] The tensioning member passes through the first structure and the second structure. Under the drive of external force, the tensioning member rotates to drive the first structure and the second structure to move toward each other.

[0014] In one of the embodiments, the clamping member and the tensioning member are arranged correspondingly, the fixing assembly includes no less than two groups of the clamping member and the tensioning member, and a plurality of the clamping members and the tensioning member are arranged on the base frame according to a preset rule.

[0015] In one of the embodiments, a side of the second positioning member away from the workpiece to be processed is further provided with an abutment structure suitable for connecting to an external fixing device, and the abutment structure is coaxially arranged with the base plate.

[0016] In one embodiment, the parallelism between the first positioning member and the substrate is 0.05 mm, and / or the parallelism between the second positioning member and the substrate is 0.05 mm.

[0017] The present application also provides a processing system, including the above-mentioned fixture and a machine tool, wherein the base frame is connected to the chuck of the machine tool, and the second positioning member abuts against the workpiece to be processed under the drive of the ejector pin of the machine tool.

[0018] The above-mentioned fixture, positioning assembly and base frame together form a accommodating cavity, which provides an effective positioning and fixing method to ensure that the workpiece to be processed remains stable during the processing. The shape and size of the accommodating cavity can be customized according to the workpiece to be processed to improve the processing accuracy and efficiency. In the processing state, the base frame is in surface contact with the workpiece to be processed, and the positioning assembly is in surface contact with the workpiece to be processed. This surface contact design effectively reduces the bounce during the processing of easily deformable parts and the risk of workpiece deformation due to clamping of the fixture by maximizing the contact area, which helps to improve the processing accuracy and stability. The fixing assembly is used to fix the positioning assembly to the base frame, ensuring that the positioning assembly remains stable relative to the base frame during the processing.

[0019] In the above-mentioned processing system, the base frame of the fixture is connected to the chuck of the machine tool, and the chuck connection provides firmness and stability of clamping. The second positioning member is driven by the ejector pin of the machine tool to abut against the workpiece to be processed, ensuring that the second positioning member can accurately abut the position of the workpiece to be processed, thereby improving the processing accuracy and controllability. Through the above-mentioned fixture, the workpiece to be processed is firmly supported and positioned during the clamping process, thereby reducing the risk of deformation or vibration during the processing process, improving the stability of the processing, and helping to reduce processing errors and the risk of workpiece deformation caused by fixture clamping. The chuck connection allows for quick and easy replacement of the fixture and the workpiece to be processed, so that the processing system can adapt to workpieces of different shapes and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the clamp provided in the embodiment of the utility model;

[0021] Figure 2 It is a partial structural schematic diagram of a positioning assembly of a clamp provided in an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the partial structure of the fixing assembly of the clamp provided in the embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 100-base frame; 110-substrate; 120-clamping structure;

[0025] 200-positioning assembly; 210-first positioning member; 220-second positioning member;

[0026] 300 -fixing assembly; 310 -clamping member; 311 -first structure; 312 -second structure; 313 -third structure; 320 -tensioning member. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] See also Figure 1 An embodiment of the utility model provides a clamp, including a base frame 100, a positioning assembly 200 and a fixing assembly 300, one end of the base frame 100 is suitable for connecting to an external driving device; the positioning assembly 200 is arranged on the base frame 100, and together with the base frame 100 forms a receiving cavity, and the receiving cavity is suitable for receiving a workpiece to be processed; the fixing assembly 300 is suitable for fixing the positioning assembly 200 to the base frame 100.

[0034] The fixture has a processing state in which it rotates along the axis driven by an external driving device. In the processing state, the base frame 100 is in surface contact with the workpiece to be processed, and the positioning assembly 200 is in surface contact with the workpiece to be processed.

[0035] In this embodiment, the fixture is driven by an external device, and this connection method can be mechanical, hydraulic, electric or other methods, so that the fixture can be more flexible to adapt to different workpieces and processing requirements during the processing. The positioning component 200 and the base frame 100 together form a accommodating cavity, which is suitable for accommodating the workpiece to be processed, providing an effective positioning and fixing method to ensure that the workpiece to be processed remains stable during the processing. The shape and size of the accommodating cavity can be customized according to the workpiece to be processed to improve the processing accuracy and efficiency. In the processing state, the base frame 100 is in surface contact with the workpiece to be processed, and the positioning component 200 is in surface contact with the workpiece to be processed. This surface contact design effectively reduces the bounce of the deformable parts during processing and the risk of deformation of the workpiece due to the clamping of the fixture by maximizing the contact area, which helps to improve the processing accuracy and stability. The fixing component 300 is used to fix the positioning component 200 to the base frame 100, ensuring that the positioning component 200 remains stable relative to the base frame 100 during the processing. The fixing assembly 300 can adopt various fixing methods, such as threaded connection, clamping device, etc., to ensure that the fixture maintains reliability during processing.

[0036] In one embodiment, the base frame 100 includes a substrate 110 and a clamping structure 120 that are connected to each other. The clamping structure 120 is arranged on a side where the substrate 110 is connected to an external driving device. The clamping structure 120 is suitable for clamping by the external driving device, and the substrate 110 is suitable for loading a workpiece to be processed. The clamping structure 120 is coaxially arranged with the substrate 110.

[0037] In this embodiment, the substrate 110 and the clamping structure 120 are connected to each other to form an integral base frame 100, which strengthens the rigidity and stability of the base frame 100, ensures that the connection between the substrate 110 and the clamping structure 120 will not loosen or deform under the action of external forces, and helps to maintain the accuracy and reliability of the fixture. The clamping structure 120 is placed on the side where the substrate 110 is connected to the external drive device, so that the external drive device can easily clamp the clamping structure 120, simplifying the installation and disassembly process and improving the operating efficiency of the fixture. The clamping structure 120 is coaxially arranged with the substrate 110, and coaxially rotates under the drive of the external device, which helps to improve the accuracy and efficiency of processing.

[0038] See also Figure 2 In one embodiment, the positioning assembly 200 includes a first positioning member 210, which is coaxially arranged with the substrate 110; the first positioning member 210 is suitable for abutting against the outer edge of the workpiece to be processed away from the axis, and a first avoidance structure suitable for inserting a turning tool is provided at the axis of the first positioning member 210.

[0039] In this embodiment, the first positioning member 210 is coaxially arranged with the substrate 110, which helps to maintain the accuracy of positioning. The first positioning member 210 is designed to abut against the outer edge of the workpiece to be processed away from the axis, and can be an annular abutment member. The workpiece to be processed is abutted by the annular abutment, which increases the contact area when the fixture clamps the workpiece, prevents the workpiece to be processed from being deformed due to clamping during the processing, and provides effective support for the side of the workpiece to be processed away from the axis, thereby ensuring the stability and accuracy of the workpiece to be processed during the processing. The first avoidance structure can be a through hole in the annular abutment member. During the processing, the turning tool extends into the accommodating cavity through the through hole to process the workpiece to be processed. The first avoidance structure enables the turning tool to avoid the first positioning member 210 during the processing to prevent collision, thereby ensuring smooth processing. Through the avoidance structure of the first positioning member 210, the turning tool can more easily pass through the positioning assembly 200, achieve accurate positioning of the workpiece to be processed, and improve the accuracy of processing.

[0040] In one embodiment, the positioning assembly 200 further includes a second positioning member 220 , which is coaxially arranged with the substrate 110 ; the second positioning member 220 is suitable for abutting against the axis of the workpiece to be processed, and the radial outer edge of the second positioning member 220 is offset from the radial outer edge of the substrate 110 .

[0041] In this embodiment, the second positioning member 220 is designed to be suitable for abutting the axis of the workpiece to be processed. Such a design helps to ensure the accurate positioning of the workpiece to be processed in the axis direction. The radial outer edge of the second positioning member 220 is offset from the radial outer edge of the substrate 110. Such a design allows the second positioning member 220 to expose the outer edge of the workpiece to be processed when it abuts against the workpiece to be processed, so as to facilitate subsequent processing. At the same time, since the second positioning member 220 abuts against the axis of the workpiece to be processed, there will be no obstacles on the feed path of the turning tool during the rotation of the fixture as a whole around the axis, thereby improving the efficiency and convenience of processing. Through the axis positioning and radial offset design, as well as the surface contact abutment between the second positioning member 220 and the workpiece to be processed, the fixture can more effectively reduce the risk of deformation of the workpiece to be processed during the processing process. This is particularly important for some workpieces with high requirements on shape and size or easily deformed materials.

[0042] In one embodiment, in the processing state, the first positioning member 210 abuts against the workpiece to be processed or the second positioning member 220 abuts against the workpiece to be processed. By using the first and second positioning members 220, the clamp can achieve a more comprehensive clamping and positioning effect, thereby improving the overall processing accuracy. The design of using two positioning members increases the adaptability of the clamp. According to the shape and size of the workpiece to be processed, and the position where the workpiece to be processed needs to be processed, the operator can choose to use the first or second positioning member 220 to meet different processing requirements, thereby improving the versatility of the clamp.

[0043] See also Figure 3 In one embodiment, the fixing assembly 300 includes a clamping member 310 and a tensioning member 320. The clamping member 310 includes a first structure 311 suitable for abutting the substrate 110, a second structure 312 suitable for abutting the first positioning member 210, and a third structure 313 suitable for connecting the first structure 311 and the second structure 312. The tensioning member 320 passes through the first structure 311 and the second structure 312. Under the drive of external force, the tensioning member 320 rotates to drive the first structure 311 and the second structure 312 to move toward each other.

[0044] In this embodiment, the first structure 311 abuts against the substrate 110, and the shape of the first structure 311 adapts to the surface shape of the substrate 110 to ensure that stable support can be obtained and provided during the processing. The second structure 312 abuts against the first positioning member 210, and the shape of the second structure 312 adapts to the surface shape of the first positioning member 210 to provide a firm abutment against the first positioning member 210. The third structure 313 connects the first structure 311 and the second structure 312. The specific connection method can adopt a threaded connection, a slot connection or other connection methods to ensure a tight connection between the first structure 311 and the second structure 312, so as to effectively transmit the externally applied force. This application does not specifically limit the connection method between the third structure 313 and the first structure 311 and the second structure 312.

[0045] Driven by external force, the tensioning member 320 rotates, and the rotation of the tensioning member 320 can drive the first structure 311 and the second structure 312 to move toward each other. This design helps to fix the substrate 110 and the first positioning member 210, while providing a clamping force for the workpiece to be processed, thereby improving the reliability of the fixture. The specific form of the tensioning member 320 can be a knob, a screw or other components that can have a fastening effect, so that the tensioning member 320 provides a force to drive the first structure 311 and the second structure 312 to move toward each other during the movement. During the processing, the tensioning force can be adjusted by adjusting the position of the tensioning member 320, so as to flexibly adapt to different processing requirements, ensuring that the fixing component 300 can tightly clamp the workpiece to be processed while reducing the deformation effect on the workpiece to be processed.

[0046] In one embodiment, the clamping member 310 and the tensioning member 320 are arranged correspondingly, and the fixing assembly 300 includes no less than two groups of clamping members 310 and tensioning members 320, and a plurality of clamping members 310 and tensioning members 320 are arranged on the base frame 100 according to a preset rule.

[0047] In this embodiment, each clamping member 310 corresponds to a tensioning member 320, and a clamping member 310 and a tensioning member 320 constitute a group. The fixing assembly 300 includes more than three groups of clamping members 310 and tensioning members 320. Each group of clamping members 310 and tensioning members 320 is centrally symmetrical about the axis of the substrate 110. The centrally symmetrically arranged groups of clamping members 310 and tensioning members 320 can balance the moment of inertia of the fixture during rotation, improve the stability during the processing, and further improve the processing accuracy. It should be noted that the present application does not specifically limit the number of clamping members 310 and tensioning members 320, so as to achieve the fixation between the first positioning member 210 and the substrate 110 and balance the moment of inertia.

[0048] In one embodiment, a side of the second positioning member 220 away from the workpiece to be processed is further provided with an abutment structure suitable for connecting to an external fixing device, and the abutment structure is coaxially arranged with the base plate 110 .

[0049] In one embodiment, the parallelism between the first positioning member 210 and the substrate 110 is 0.05 mm, and / or the parallelism between the second positioning member 220 and the substrate 110 is 0.05 mm. Specifically in this embodiment, the parallelism between the first positioning member 210, the second positioning member 220 and the substrate 110 is 0.05 mm. By ensuring that the parallelism between the first and second positioning members 220 and the substrate 110 is within 0.05 mm, the fixture can help reduce the processing errors caused by inaccurate positioning. This is crucial for some application scenarios with extremely high precision requirements, such as high-precision parts manufacturing. The high parallelism design helps to reduce the risk of deformation of the workpiece by the fixture.

[0050] An embodiment of the utility model further provides a processing system, including the above-mentioned fixture and a machine tool, wherein the base frame 100 is connected to the chuck of the machine tool, and the second positioning member 220 abuts against the workpiece to be processed under the drive of the ejector pin of the machine tool.

[0051] Specifically in this embodiment, the processing process is as follows:

[0052] Fix the clamping structure 120 to the chuck of the machine tool, then place the workpiece to be processed on the substrate 110, then place the first positioning member 210 on the workpiece, and then use the fixing assembly 300 to fix the first positioning member 210. This clamping can prevent deformation during processing, and then start the machine tool to process the inner side of the workpiece to be processed. After the processing is completed, use the lathe's ejector pin to fix the second positioning member 220 to the workpiece to be processed, then remove the fixing assembly 300 and the first positioning member 210, and then start the machine tool to process the outer side of the workpiece to be processed, and repeat the above actions to process the other side of the workpiece to be processed.

[0053] The base frame 100 of the fixture is connected to the chuck of the machine tool to ensure that the fixture is firmly mounted on the machine tool, and the chuck connection ensures the firmness and stability of the clamping. The second positioning member 220 is driven by the ejector pin of the machine tool to achieve abutment with the workpiece to be processed, ensuring that the second positioning member 220 can accurately abut the position of the workpiece to be processed, thereby improving the accuracy and controllability of the processing. Through the above-mentioned fixture, the workpiece to be processed is firmly supported and positioned during the clamping process, thereby reducing the risk of deformation or vibration during the processing process, improving the stability of the processing, and helping to reduce the processing error. The chuck connection allows for quick and easy replacement of the fixture and the workpiece to be processed, so that the processing system can adapt to workpieces of different shapes and sizes. It is conducive to adapting to production lines that require frequent replacement of workpieces or scenarios of multi-variety and small-batch production.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A clamp, characterized in that: The fixture comprises: A base frame (100), one end of the base frame (100) being suitable for connection with an external drive device; A positioning assembly (200), the positioning assembly (200) being arranged on the base frame (100) and forming a receiving cavity together with the base frame (100), the receiving cavity being suitable for receiving a workpiece to be processed; A fixing assembly (300), wherein the fixing assembly (300) is suitable for fixing the positioning assembly (200) and the base frame (100); The clamp has a processing state in which it rotates along the axis under the drive of an external drive device. In the processing state, the base frame (100) is in surface contact with the workpiece to be processed, and the positioning assembly (200) is in surface contact with the workpiece to be processed.

2. The clamp according to claim 1, characterized in that: The base frame (100) comprises a base plate (110) and a clamping structure (120) which are connected to each other, wherein the clamping structure (120) is arranged on a side of the base plate (110) connected to an external drive device, the clamping structure (120) is suitable for being clamped by the external drive device, and the base plate (110) is suitable for loading a workpiece to be processed; The clamping structure (120) and the substrate (110) are coaxially arranged.

3. The clamp according to claim 2, characterized in that: The positioning assembly (200) comprises a first positioning member (210), wherein the first positioning member (210) is coaxially arranged with the substrate (110); The first positioning member (210) is suitable for abutting against the outer edge of the workpiece to be processed away from the axis, and a first avoidance structure suitable for inserting a turning tool is provided at the axis of the first positioning member (210).

4. The clamp according to claim 3, characterized in that: The positioning assembly (200) further comprises a second positioning member (220), wherein the second positioning member (220) is coaxially arranged with the substrate (110); The second positioning member (220) is suitable for abutting against the axis of the workpiece to be processed, and the radial outer edge of the second positioning member (220) is offset from the radial outer edge of the substrate (110).

5. The clamp according to claim 4, characterized in that: In the processing state, the first positioning member (210) abuts against the workpiece to be processed or the second positioning member (220) abuts against the workpiece to be processed.

6. The clamp according to claim 3, characterized in that: The fixing assembly (300) comprises a clamping member (310) and a tensioning member (320); the clamping member (310) comprises a first structure (311) suitable for abutting against the substrate (110), a second structure (312) suitable for abutting against the first positioning member (210), and a third structure (313) suitable for connecting the first structure (311) and the second structure (312); The tensioning member (320) passes through the first structure (311) and the second structure (312). Under the drive of an external force, the tensioning member (320) rotates to drive the first structure (311) and the second structure (312) to move toward each other.

7. The clamp according to claim 6, characterized in that The clamping member (310) and the tensioning member (320) are arranged correspondingly, and the fixing assembly (300) includes no less than two groups of the clamping members (310) and the tensioning members (320), and a plurality of the clamping members (310) and the tensioning members (320) are arranged on the base frame (100) according to a preset rule.

8. The clamp according to claim 5, characterized in that: A side of the second positioning member (220) away from the workpiece to be processed is also provided with an abutment structure suitable for connecting to an external fixing device, and the abutment structure is coaxially arranged with the base plate (110).

9. The clamp according to claim 8, characterized in that The parallelism between the first positioning member (210) and the substrate (110) is 0.05 mm, and / or The parallelism between the second positioning member (220) and the substrate (110) is 0.05 mm.

10. A processing system, characterized in that: The clamp comprises the fixture as claimed in any one of claims 1 to 9, and also comprises a machine tool, wherein the base frame (100) is connected to the chuck of the machine tool, and the second positioning member (220) abuts against the workpiece to be processed under the drive of the ejector pin of the machine tool.

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