Positioning tool, tool kit, machining equipment and workpiece positioning method

Abstract

The embodiment of the invention provides a positioning tool, a tool kit, machining equipment and a workpiece positioning method. The positioning tool comprises a body, a tool sleeve and a workpiece positioning device, the first connecting assembly is used for fixing a workpiece to the body; the marking part is arranged on the body, and the position of the marking part relative to the body is fixed, so that a preset machining position on the workpiece installed in the body is allowed to be obtained according to the position of the marking part.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of semiconductor technology, and in particular to a positioning tool, a tool kit, a processing device and a workpiece positioning method. BACKGROUND

[0002] In the fields of semiconductor manufacturing, photovoltaic industry, micro-electro-mechanical systems (MEMS) and precision electronic processing, various hard and brittle materials are widely used in the manufacturing of electronic devices, photovoltaic components, radio frequency devices and high-frequency high-power components due to their excellent electrical, thermal and mechanical properties. In order to meet the needs of different application scenarios, high-precision processing such as high-precision drilling is usually required on these materials to achieve functions such as circuit connection, fixed installation or fluid channel construction. However, due to the characteristics of high hardness, low ductility and easy fragmentation of hard and brittle materials, drilling processing of these materials faces many challenges.

[0003] At present, the commonly used drill bit materials for drilling hard and brittle materials mainly include super-hard drill bit materials and high-performance hard alloy materials. Among them, super-hard drill bit materials are mainly represented by diamond and cubic boron nitride (cBN), including polycrystalline diamond (PCD), single crystal diamond (SCD) and polycrystalline cubic boron nitride (PCBN). Among them, PCD drill bits dominate in the field of drilling hard and brittle non-metallic materials due to their high hardness, high wear resistance and chemical stability, and have been widely used in the semiconductor industry.

[0004] Although the existing technology has made improvements in the processing technology of hard and brittle materials, for example, single-sided drilling or double-sided drilling is selected according to product requirements, there are still many technical difficulties. In addition, due to the large drilling resistance of hard and brittle materials, drill bit wear is aggravated, which further affects the processing precision and production efficiency. Therefore, it is still necessary to continue to improve the drilling process of hard and brittle materials to improve drilling precision, prolong drill bit life, improve processing efficiency, and optimize the concentricity of double-sided drilling to meet the corresponding product requirements. SUMMARY

[0005] Therefore, embodiments of the present disclosure aim to provide a positioning tool, a tool kit, a processing device and a workpiece positioning method. The use of the positioning tool can provide accurate positioning during processing, improve processing accuracy, and reduce workpiece deformation and processing errors.

[0006] The technical solutions of the embodiments of the present disclosure are implemented as follows: In a first aspect, embodiments of the present disclosure provide a positioning tool, comprising: a body; a first connecting assembly for fixing a workpiece to the body; a marker provided on the body, a position of the marker relative to the body being fixed to allow a predetermined machining position on the workpiece installed in the body to be obtained according to the position of the marker.

[0007] In some optional examples, the body has a through portion penetrating in a thickness direction of the body, and the workpiece is fixed in the through portion by the first connecting assembly.

[0008] In some optional examples, the first connecting assembly is arranged to be capable of applying opposite forces in the thickness direction of the body.

[0009] In some optional examples, the positioning tool further comprises a stop portion arranged to protrude from an inner peripheral wall of the through portion towards a center of the through portion.

[0010] In some optional examples, the first connecting assembly comprises two clamping portions for applying the opposite forces, wherein a maximum distance between the two clamping portions in the thickness direction is greater than a thickness of the body.

[0011] In some optional examples, the positioning tool further comprises an auxiliary positioning portion arranged on and exposed to a peripheral surface of the body.

[0012] In some optional examples, the body has two surfaces opposite in the thickness direction thereof, and the marker comprises two portions, wherein the two portions are respectively arranged on the two surfaces, and positions of the two portions relative to each other are fixed.

[0013] In some optional examples, the body further comprises a groove arranged on an inner peripheral wall of the through portion, the groove being open towards a center of the through portion and penetrating the body in the thickness direction.

[0014] In a second aspect, embodiments of the present disclosure provide a workpiece positioning method for positioning a workpiece on a work surface by using a positioning tool according to the first aspect, the method comprising: fixing a workpiece to a body of the positioning tool by a first connecting assembly of the positioning tool; placing the positioning tool and the workpiece on a work surface; obtaining a position of a marker provided on the body; obtaining a predetermined machining position on the workpiece according to the position of the marker portion, wherein the body includes a through portion extending through a thickness direction of the body, the first connecting assembly includes two clamping portions applying forces in opposite directions along the thickness direction, and a maximum distance between the two clamping portions in the thickness direction is greater than a thickness of the body, and wherein the fixing of the workpiece to the body of the positioning tool via the first connecting assembly of the positioning tool includes fixing the workpiece in the through portion of the body via the two clamping portions of the first connecting assembly, and the placing of the positioning tool and the workpiece on the work surface includes placing the positioning tool and the workpiece on the work surface such that the body is spaced apart from the work surface.

[0015] In a third aspect, the embodiments of the present disclosure provide a tool set, which includes a base plate for carrying a workpiece and a positioning tool according to the first aspect.

[0016] In some optional examples, the base plate has a work surface for placing the workpiece, and the tool set further includes a second connecting assembly for fixing the workpiece to the work surface.

[0017] In some optional examples, the work surface is provided with a receiving portion for partially receiving a portion of the positioning tool protruding from a body of the positioning tool in a thickness direction thereof.

[0018] In some optional examples, in a case where the positioning tool includes an auxiliary positioning portion provided on a circumferential surface of the body and exposed to the circumferential surface of the body, the work surface is further provided with a limiting portion, wherein the limiting portion is arranged to be capable of abutting against the auxiliary positioning portion.

[0019] In a fourth aspect, the embodiments of the present disclosure provide a machining device, which includes a positioning unit and a positioning tool according to the first aspect, wherein the positioning unit is configured to be capable of detecting a marker portion provided on a body of the positioning tool to obtain a predetermined machining position on a workpiece mounted in the body according to a position of the marker portion.

[0020] In some optional examples, the machining device has a work surface for placing the workpiece, and the machining device further includes a second connecting assembly for fixing the workpiece to the work surface.

[0021] In some optional examples, the work surface is provided with a receiving portion for partially receiving a portion of the positioning tool that protrudes in a thickness direction of the positioning tool from the body of the positioning tool.

[0022] In some optional examples, in the case where the positioning tool comprises an auxiliary positioning portion provided on the circumferential surface of the body and exposed to the circumferential surface of the body, the work surface is further provided with a limiting portion, wherein the limiting portion is arranged to be capable of abutting against the auxiliary positioning portion.

[0023] Embodiments of the present disclosure provide a positioning tool, a tool kit, a machining device, and a workpiece positioning method. The positioning tool can fix a workpiece to be machined to a body and ensure that a marking portion is fixed in position relative to the body through the marking portion provided on the body. When the workpiece is fixed to a work surface of a machining device, a positioning unit of the machining device can detect the position of the marking portion, thereby obtaining position information of the marking portion on the work surface. Based on the position information, the machining device can calculate actual position information of a predetermined machining position on the workpiece on the work surface. By using the actual position information, the machining device can accurately adjust a machining path, ensuring that the machining operation is strictly in accordance with the predetermined target point. By using the positioning tool, machining position errors caused by workpiece clamping errors or cumulative positioning deviations can be effectively reduced, thereby improving machining precision. Especially when the workpiece needs to be machined on both sides, by detecting the position of the marking portion, the machining device can dynamically compensate and adjust the machining path, so that even if there is a slight position change after the workpiece is flipped, the machining operation can still be accurately aligned. This helps to improve the quality and consistency of double-sided machining. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic perspective view of a conventional clamp.

[0025] Figure 2 is a sectional view of a workpiece.

[0026] Figure 3 is a schematic perspective view of a positioning tool and a machining device provided by an embodiment of the present disclosure.

[0027] Figure 4 is a top view of a positioning tool provided by an embodiment of the present disclosure.

[0028] Figure 5 is a partial perspective view of a positioning tool provided by an embodiment of the present disclosure.

[0029] Figure 6 is a schematic perspective view of a positioning tool provided by another embodiment of the present disclosure.

[0030] Figure 7A partial perspective view of a positioning fixture provided for another embodiment of the present disclosure.

[0031] Figure 8 A perspective view of a positioning fixture provided for yet another embodiment of the present disclosure.

[0032] Figure 9 A perspective view of a positioning fixture provided for still another embodiment of the present disclosure.

[0033] Figure 10 A partial top view of a positioning fixture provided for still another embodiment of the present disclosure.

[0034] Figure 11 A partial sectional view of a positioning fixture provided for another embodiment of the present disclosure.

[0035] Figure 12 A perspective exploded view of a fixture kit provided for an embodiment of the present disclosure.

[0036] Figure 13 A perspective exploded view of a machining apparatus provided for an embodiment of the present disclosure.

[0037] Figure 14 A flowchart of a method for positioning a workpiece on a work surface provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The present disclosure will be described in detail below with reference to the attached drawings, by way of exemplary embodiments. It is noted that the following detailed description of the present disclosure is merely for illustrative purposes and is by no means limiting to the present disclosure.

[0039] It is noted that, for the sake of clarity, not all features of a specific embodiment are described and depicted in the specification and drawings, and in order to avoid obscuring the technical solutions of the present disclosure with unnecessary details, only the device structures closely related to the technical solutions of the present disclosure are described and depicted in the specification and drawings, while other details which are not closely related to the technical content of the present disclosure and are known to those skilled in the art are omitted.

[0040] As mentioned above, in the semiconductor industry, drilling of workpieces made of hard and brittle materials, such as single crystal silicon electrodes, is mainly performed by drill bits made of superhard materials, wherein a common drill bit material includes polycrystalline diamond (PCD). The drilling process mainly includes single-sided drilling and double-sided drilling. In the single-sided drilling process, the workpiece is fixed on a worktable, and a PCD drill bit is used to drill from one side of the workpiece to the other side until the drill bit penetrates through the entire workpiece, or a certain amount of excess is left when the hole is not completely penetrated, and then the excess is ground using a grinding wheel to make the hole completely penetrated. In the double-sided drilling process, the workpiece is also fixed on a worktable, and a PCD drill bit drills down from one side of the material to an intermediate position, then the workpiece is flipped and drilled again until the hole is penetrated at the intermediate position.

[0041] In the single-sided drilling process, the main problem of the drilling process is that if the length-diameter ratio of the drill bit is large, i.e., the ratio of the total length of the drill bit to the diameter is large, the rigidity of the drill bit is poor, and the drill bit is easy to deviate, resulting in an out-of-tolerance hole size. In addition, the drill bit with a large length-diameter ratio has difficulty in chip removal during deep hole machining, has poor cooling effect, and the tool wears severely, thereby reducing the service life of the drill bit and making it difficult to ensure the machining accuracy. Moreover, in order to avoid the breakage of the drill bit, the cutting parameters must be reduced, thereby leading to the prolongation of the machining time and affecting the production efficiency. Although the double-sided drilling process can reduce the above problems to some extent, due to the difficulty in ensuring the positioning accuracy of the workpiece on the worktable, the two-sided drilling may have concentricity and location error, resulting in hole position deviation or hole wall misalignment, which affects the final machining quality.

[0042] Whether single-sided drilling or double-sided drilling is used, the workpiece needs to be stably fixed on the worktable and precisely positioned at the predetermined drilling position to ensure that the size and position accuracy of the final hole meet the requirements. Currently, in order to improve the drilling accuracy, the existing technology usually uses a clamp to fix the workpiece. However, the conventional clamp is usually in direct contact with the worktable, and the clamp is fixed on the worktable by fasteners, which can cause deformation of the clamp and thus deformation of the workpiece. Especially in the high-precision double-sided drilling process, the deformation of the workpiece can cause hole position error, so that the holes drilled from both sides cannot be coaxially connected, thereby affecting the machining quality of the final workpiece.

[0043] As Figure 1As shown, the workpiece W is generally disc-shaped and has opposite first and second surfaces S1 and S2 to be machined, which are connected by a circumferential portion C1. The fixture 100 is generally rectangular plate-shaped and has a central through-hole 101. The workpiece W can be placed at the central through-hole 101 and fixed integrally with the fixture 100 by the connecting member 102. In addition, the fixture 100 is provided with four mounting holes 103 near its four corners, which penetrate along the thickness direction of the fixture 100 and are used to cooperate with the mounting posts 202 on the stage 201 to fix the workpiece W in place. In this fixing manner, the drilling device 200 can perform drilling operation on the exposed surfaces to be machined of the workpiece W. For a double-sided drilling process, the workpiece W and the fixture 100 can be flipped over to drill the first and second surfaces S1 and S2 to be machined, respectively, so as to realize through-hole drilling.

[0044] In the above drilling device 200, the positioning of the workpiece W on the stage 201 is mainly realized by the cooperation of the mounting holes 103 and the mounting posts 202. Once the mounting posts 202 pass through the mounting holes 103 and fix the fixture 100 and the workpiece W on the stage 201, the workpiece W is considered to be positioned and will be drilled in this state. However, in actual production, due to factors such as machining tolerance and material deformation, some mounting posts 202 may not be able to pass through the mounting holes 103 smoothly. In addition, in order to ensure the accuracy of the drilling position, the cooperation gap between the mounting holes 103 and the mounting posts 202 is usually designed to be small, which may cause the fixture 100 to deform due to interference fit even if the mounting posts 202 can be forced to pass into the mounting holes 103, thereby causing the workpiece W fixed integrally with the fixture 100 to deform. In this case, the actual drilling position of the workpiece W may deviate from the target position, especially in a double-sided drilling process, the drilling positions on different sides may not be accurately aligned, affecting the coaxiality of the holes and the machining quality, see the holes H in Figure 2

[0045] In view of this, embodiments of the present disclosure provide a positioning tool, a tool kit, a machining device and a workpiece positioning method. The positioning tool can provide accurate positioning during machining, improve machining accuracy and reduce workpiece deformation and machining errors.

[0046] Referring to Figure 3 and Figure 4 some embodiments of the present disclosure provide a positioning tool 1. The positioning tool 1 can include a body 11, a first connecting assembly 12 for fixing a workpiece W integrally with the body 11, and a marking portion 13 provided on the body 11. The position of the marking portion 13 relative to the body 11 is fixed to allow the machining position on the workpiece W mounted in the body 11 to be obtained according to the position of the marking portion.

[0047] ​The workpiece W includes a position that needs to be machined, i.e., a target point, which specifically refers to a position on the workpiece W where a machining operation is to be performed, such as a specific position where drilling, cutting, or marking is to be performed. The position information of the target point can be coordinate data.

[0048] In some specific machining scenarios, the workpiece W can be placed and fixed on a worktable or other suitable work surface, i.e., the work surface 21, of the machining device 2 together with the positioning tool 1. The machining device 2 can be a drilling device, a cutting device, or a marking device.

[0049] The body 11 can be fixedly connected to the workpiece W in a detachable manner through the first connecting assembly 12, so that the two form an integral whole. Based on this, it can be ensured that the body 11 can be disassembled without damaging the workpiece W, improving the reusability, and avoiding affecting the machining quality of the workpiece W. The body 11 and the first connecting assembly 12 are also arranged such that when the body 11 is connected to the workpiece W, the target point on the workpiece W is completely exposed and is not blocked by the body 11 and the first connecting assembly 12, especially not blocked on the machining path of the workpiece W, so as to ensure that the machining operation on the target point can be smoothly performed, and avoid affecting the machining precision or damaging the body 11 and the first connecting assembly 12 due to structural interference.

[0050] In some embodiments of the present disclosure, the body 11 can be a plate-shaped structure, and has opposite first and second surfaces 11A and 11B (see FIG. 2) Figure 3 and Figure 4 In the middle, the second surface 11B is blocked), wherein the direction perpendicular to the first and second surfaces 11A and 11B can be defined as the thickness direction of the body 11. When the body 11 is fixed to the workpiece W, the first surface 11A is located on the same side as the first surface to be machined S1, and the second surface 11B is located on the same side as the second surface to be machined S2. The marking portion 13 can be arranged on the first and second surfaces 11A and 11B to ensure that it can be accurately recognized by the positioning unit 22 of the machining device 2, thereby guaranteeing the high-precision positioning requirement of machining.

[0051] In certain application scenarios, the self-weight of the workpiece W can not be sufficient to resist the force generated during machining, and therefore an additional fixing method is needed to ensure that the workpiece W remains stable during machining to prevent positional deviation from affecting the machining precision. Based on this, the workpiece W can be stably held on the work surface 21 of the machining device 2 through various fixing methods. The present disclosure does not make specific limitations on this, for example, the workpiece W can be fixedly adhered to the work surface 21 through a vacuum suction method to utilize negative pressure to provide a stable holding force to prevent the workpiece from slipping during machining. In addition, the workpiece W can also be stably held through mechanical clamping, magnetic attraction, or other fixing methods suitable for specific applications to ensure the positioning accuracy during machining.

[0052] When the workpiece W is fixed to the working surface 21, the marking portion 13 can be identified, for example, by the positioning unit 22 if the machining device 2 comprises the positioning unit 22. The specific form of the marking portion 13 can be adjusted according to different application requirements. For example, the marking portion 13 can adopt a marking point that can be detected by a Renishaw probe, thereby providing accurate spatial coordinate information in high-precision machining. In addition, the marking portion 13 can also adopt an optical recognition mark, a magnetic mark, a mechanical positioning groove, or other marking structures that can be detected by a precision measurement device to ensure reliable and accurate positioning in different types of machining devices.

[0053] Since the marking portion 13 is pre-provided on the body 11, when the body 11 is fixed integrally with the workpiece W, the relative position between the marking portion 13 and the target point on the surface of the workpiece W to be machined is known and fixed. Compared with the scheme of forcibly fixing the body 11 on the working surface 21 in a mechanical manner, the embodiment effectively avoids the deformation of the body 11 caused by forced fixation, as the body 11 does not need to be rigidly fixed. This design not only reduces the indirect deformation effect on the workpiece W, but also makes the relative position between the marking portion 13 and the workpiece W more accurate, further improving the reliability of machining positioning.

[0054] After the workpiece W together with the body 11 is fixed to the working surface 21, once the first position of the marking portion 13 on the working surface 21 is identified by the positioning unit 22 of the machining device 2, and the position information, for example, coordinate data, of the marking portion 13 on the working surface 21 is determined, the second position of the target point on the working surface 21, i.e., the actual coordinate information of the target point, can be calculated and obtained based on the relative position relationship between the marking portion 13 and the target point.

[0055] Compared with the scheme in the conventional method that forcibly fixes the workpiece and the body at a predetermined position on the working surface and does not correct the actual position of the target point, the embodiment provides the machining device 2 with the actual position information of the target point on the working surface, so that the machining device 2 can accurately adjust the machining path based on the actual position information, thereby ensuring that the machining operation is always performed at the predetermined target point position. This scheme can effectively reduce the machining position error caused by workpiece clamping error or cumulative positioning deviation, thereby significantly improving the machining precision.

[0056] Especially when double-sided machining operation is performed on the workpiece W, the position of the workpiece W on the working surface 21 can be shifted due to the need of turning over the workpiece W during machining. The conventional method relies on mechanical fixation, which is difficult to ensure the accurate alignment of the machining position after turning over, and can cause the double-sided drilling trajectory not to be completely coaxial, thereby affecting the quality and concentricity of the hole. However, the embodiment provides the accurate target point position information to the machining equipment through the marking part 13, so that even if the position of the workpiece W is changed due to turning over, the machining equipment 2 can still dynamically compensate and adjust based on the actual detection result of the marking part, thereby ensuring the accurate alignment of double-sided machining and improving the machining quality and consistency.

[0057] It should be noted that although in Figure 3 and Figure 4 the workpiece W is shown in a disc shape, for example, the workpiece W can be a silicon wafer, a silicon carbide wafer, a circular ring plate made of silicon carbide, etc. However, the specific shape of the workpiece is not limited in the present disclosure, and accordingly, the positioning tool 1 can be adaptively adjusted according to the geometric characteristics of the workpiece. For example, when the workpiece W is in the shape of a rectangular plate, a circular ring plate or other special-shaped structure, the shape of the body 11 of the positioning tool 1, the arrangement of the first connecting assembly 12 and the position of the marking part 13 can all be adjusted accordingly to ensure that the workpiece can be stably fixed on the working surface of the machining equipment, and the marking part 13 can still be accurately recognized by the positioning unit of the machining equipment. These variants all belong to the technical scope of the present disclosure and fall within the protection scope of the present disclosure.

[0058] In order to facilitate the double-sided machining operation on the workpiece W, in some embodiments of the present disclosure, referring to Figure 5 the body 11 can have a through portion 111 penetrating through the thickness direction thereof, and the workpiece W is fixed in the through portion 111 by the first connecting assembly 12.

[0059] In this structure, the provision of the through portion 111 makes the first to-be-machined surface S1 and the second to-be-machined surface S2 of the workpiece W both be in an exposed state on both sides of the body 11 in the thickness direction, thereby supporting the double-sided machining of the workpiece W. In particular in the double-sided machining application, this structure can effectively avoid the error accumulation caused by re-clamping after turning over, further improving the accuracy of machining alignment and machining efficiency. Since the body 11 does not block the upper and lower surfaces of the workpiece W in the region of the through portion 111, the workpiece turning operation can be directly performed without replacing the positioning and clamping device, greatly simplifying the process flow.

[0060] In combination with Figure 3 and Figure 5On the basis of the above structure, the position of the marking portion 13 can also be optimized according to the overall structure of the body 11. For example, the marking portion 13 can be arranged at a position close to the edge of the through portion 111, thereby avoiding being blocked by the spindle or tool path of the machining equipment, while ensuring that it can be accurately recognized by the positioning unit 22 (see Figure 3 ) of the machining equipment before and after the workpiece is flipped.

[0061] In summary, the positioning tool 1 proposed in the embodiments of the present disclosure realizes precise positioning and clamping support functions in various workpiece shapes and multiple machining scenarios by setting the marking portion 13, the first connecting assembly 12, and the structure-adaptive body 11, significantly improving the machining precision and flexibility of the machining equipment. It is not only suitable for single-sided machining scenarios, but also particularly suitable for complex application environments such as double-sided machining, high-precision alignment, and dynamic compensation.

[0062] In addition, the material of the body 11 can be selected according to application requirements to meet the requirements of rigidity, wear resistance, corrosion resistance, and machining precision. For example, the body 11 can be made of stainless steel, aluminum, or their alloy materials to provide higher structural stability and ensure that the positioning precision is not affected by stress deformation during drilling. At the same time, in order to reduce the mass of the body 11 and improve the operational flexibility of the machining equipment, the body 11 can also be made of high-strength engineering plastics, ceramic composite materials, or carbon fiber reinforced polymers (CFRP), thereby reducing additional loads while ensuring rigidity. In addition, in some application scenarios where the pollution of the workpiece is required to be higher, the surface of the body 11 can be specially treated, such as coated with a protective layer or using an oxidation-resistant coating, to avoid particle pollution or metal ion pollution, thereby meeting the machining environment requirements of high cleanliness such as semiconductor manufacturing. In some embodiments of the present disclosure, the first connecting assembly 12 can be arranged to apply opposite forces along the thickness direction of the body 11 to fix the body 11 and the workpiece W as a whole by clamping the workpiece W, without the need to apply excessive radial extrusion force to the workpiece W, to avoid workpiece deformation or damage due to stress concentration.

[0063] For example, the body 11 can be made of stainless steel, aluminum, or their alloy materials to provide higher structural stability and ensure that the positioning precision is not affected by stress deformation during drilling. At the same time, in order to reduce the mass of the body 11 and improve the operational flexibility of the machining equipment, the body 11 can also be made of high-strength engineering plastics, ceramic composite materials, or carbon fiber reinforced polymers (CFRP), thereby reducing additional loads while ensuring rigidity. In addition, in some application scenarios where the pollution of the workpiece is required to be higher, the surface of the body 11 can be specially treated, such as coated with a protective layer or using an oxidation-resistant coating, to avoid particle pollution or metal ion pollution, thereby meeting the machining environment requirements of high cleanliness such as semiconductor manufacturing. In some embodiments of the present disclosure, the first connecting assembly 12 can be arranged to apply opposite forces along the thickness direction of the body 11 to fix the body 11 and the workpiece W as a whole by clamping the workpiece W, without the need to apply excessive radial extrusion force to the workpiece W, to avoid workpiece deformation or damage due to stress concentration. Figure 5As shown, the first connecting assembly 12 can be arranged at the edge region of the through portion 111, so as to be in contact with the non-machining region of the workpiece W, thereby further ensuring that the machining region of the workpiece W is not interfered. One end of the first connecting assembly 12 is used to clamp the workpiece W, and the other end is connected to the body 11, thereby forming a stable fixing structure. More specifically, the first connecting assembly 12 can include a first clamping portion 12A and a second clamping portion 12B. The first clamping portion 12A and the second clamping portion 12B are respectively located at the edges of the first to-be-machined surface S1 and the second to-be-machined surface S2 of the workpiece W, and are oppositely arranged in the thickness direction of the workpiece W. Through such an arrangement, the first clamping portion 12A and the second clamping portion 12B can exert clamping force in the thickness direction of the workpiece W, so that the workpiece W is stably fixed to the body 11 without being subjected to excessive extrusion force.

[0064] In addition, the other end of the first clamping portion 12A and the second clamping portion 12B can be connected to the body 11 through a threaded fastener, a buckle structure or other adjustable fixing member, so as to provide reliable detachable connection. In this way, not only is the installation and disassembly of the workpiece W facilitated, but also workpieces of different thicknesses can be accommodated, thereby improving the versatility of the positioning tool.

[0065] It is worth noting that the clamping method of the present disclosure provides uniform clamping force through the two to-be-machined surfaces of the workpiece W, without exerting radial extrusion force on the workpiece W towards the center of the workpiece W. Such a clamping method can effectively reduce the deformation of the workpiece W during clamping, improve the stability of the workpiece W during machining operation, and thus ensure the accuracy and consistency of the machining position.

[0066] In some embodiments of the present disclosure, referring to Figure 4 A plurality of first connecting assemblies 12 can be provided, and these first connecting assemblies 12 are arranged in a spaced manner around the center of the workpiece W in the circumferential direction of the workpiece W. Through this arrangement, the first connecting assemblies 12 can uniformly distribute the connecting force, reduce the stress concentration problem caused by single-point fixing, and improve the stability of the workpiece W. In addition, the discrete arrangement of the first connecting assemblies 12 can ensure that the workpiece W does not significantly deform during fixing, thereby avoiding the influence of subsequent machining accuracy due to uneven clamping force.

[0067] When performing a drilling operation on the workpiece W, the rotary drilling force can cause the workpiece W to rotate relative to the positioning tool 1, thereby affecting the drilling accuracy and even causing machining errors. In order to solve this problem, in some embodiments of the present disclosure, referring to Figure 6 and Figure 7The positioning tool 1 can further comprise a stop portion 14 configured to protrude from an inner wall of the through portion 111 towards a center of the through portion 111. Thus, the stop portion 14 can be configured to abut against the circumferential portion C1 of the workpiece W when the body 11 and the workpiece W are fixed as one, so as to prevent the workpiece W from rotating relative to the body 11.

[0068] The stop portion 14 can resist the rotating drilling force by friction with the circumferential portion C1 of the workpiece W, so as to effectively limit the rotation of the workpiece W. Specifically, the stop portion 14 can have a protruding structure to contact the circumferential portion C1 of the workpiece W after the workpiece W is mounted to the body 11. With this design, the rotating tendency of the workpiece W under the drilling force can be limited by the stop portion 14, so as to ensure that the workpiece W remains stable during the entire machining process.

[0069] In order to provide sufficient friction while avoiding mechanical damage or surface contamination of the workpiece W by the stop portion 14, the stop portion 14 can be made of polyether ether ketone (PEEK), polyurethane or other high-molecular elastic materials. These materials not only have good wear resistance and certain elastic deformation ability, but also can provide a cushioning effect when abutting against the workpiece W, reducing damage that can be caused by local stress concentration. In addition, in some embodiments, the surface of the stop portion 14 can be specially treated, such as increasing micro-texture or coating a non-slip layer, to further improve the friction and enhance the anti-rotation ability.

[0070] In addition, the shape and arrangement of the stop portion 14 can be adjusted according to the specific shape of the workpiece W. For example, for a workpiece W with a regular circumferential edge, the stop portion 14 can adopt a structure of multiple evenly distributed contact points to provide stable rotation-stopping function without affecting the clamping and dismounting of the workpiece W. For a workpiece W with a non-circular outer contour, the shape of the stop portion 14 can be optimized according to the geometric characteristics of the workpiece to ensure the best stopping effect.

[0071] In some embodiments of the present disclosure, referring to Figure 5 The first connecting assembly 12 comprises two clamping portions for applying opposite forces along the thickness direction of the body 11, wherein the maximum distance between the two clamping portions in the thickness direction is greater than the thickness of the body 11.

[0072] As shown in Figure 5 The first clamping portion 12A and the second clamping portion 12B can form a clamping region for clamping the workpiece W. In the clamping region, the first clamping portion 12A and the second clamping portion 12B are spaced apart by a distance d1. The distance d1 corresponds to the thickness of the workpiece W, so that the workpiece W can be fixed as one with the body 11 by the first connecting assembly 12. In this embodiment, the distance d1 is greater than the thickness d2 of the body 11. Specifically, as Figure 5As shown in FIG, a distance d3 exists between first clamping portion 12A and body 11. In other words, first clamping portion 12A is "lifted" by second clamping portion 12B and is not in contact with body 11. Furthermore, the presence of distance d3 causes distance d1 to be greater than thickness d2 of body 11. By ensuring that workpiece W at least partially conforms to work surface 21 and relies on work surface 21 for support, while maintaining a certain gap between body 11 and work surface 21, deformation of body 11 itself can be prevented from affecting the conformity of workpiece W, thereby ensuring machining accuracy and stability.

[0073] In particular, in a double-sided machining process, in order to prevent the two opposite surfaces of the body 11 from contacting the working surface 21, in some embodiments of the present disclosure, with the aid of the first clamping portion 12A and the second clamping portion 12B, it is possible to simultaneously allow the workpiece W to protrude from the body 11 in the thickness direction of the body 11. In this case, when the workpiece W and the positioning fixture 1 are mounted on the working surface 21 together, the body 11 does not contact the working surface 21, but the workpiece W contacts the working surface 21.

[0074] like Figure 5 As shown, the first connecting assembly 12 secures the workpiece W and the body 11 together, so that the first and second surfaces to be machined S1, S2 of the workpiece W protrude beyond the through-portion 111 of the body 11, and further protrude beyond the first and second surfaces 11A, 11B of the body 11, respectively. This creates a gap G between the second surface 11B of the body 11 and the working surface 21, ensuring that the body 11 does not interfere with the working surface 21 or affect the clamping state of the workpiece W.

[0075] The above embodiment ensures that the surface to be machined of the workpiece W is fully exposed, facilitating machining operations by the machining equipment. Furthermore, since the body 11 does not contact the working surface 21, deformation of the body 11 due to load, temperature changes, or assembly errors can prevent the impact on the fit of the workpiece W, thereby improving machining consistency and accuracy.

[0076] In some embodiments of the present disclosure, see Figure 8 The positioning tool 1 may further include an auxiliary positioning portion 15 provided on the circumferential surface of the body 11 . The auxiliary positioning portion 15 may be provided on the circumferential surface of the body 11 and exposed to the circumferential surface of the body 11 .

[0077] Before machining, it is necessary to ensure that the workpiece W is in the proper machining position so that the marking portion 13 can enter the recognition range of the positioning unit 22. Typically, the placement of the workpiece W may be subject to error, and precise manual adjustment is both time-consuming and difficult. To address this, this embodiment provides an auxiliary positioning method, using the auxiliary positioning portion 15 to approximately place the workpiece W in the predetermined position. This reduces the initial search range of the marking portion 13, improves recognition efficiency, and shortens the time required to determine the position of the marking portion 13.

[0078] Specifically, if Figure 8 As shown, in this embodiment, the body 11 is generally rectangular, but one side surface is not completely flush. Instead, it is provided with two spaced-apart V-shaped grooves. Each V-shaped groove opens away from the center of the body 11, exposing this side surface of the body 11, thereby forming an auxiliary positioning portion 15. Accordingly, two columnar stoppers 23 can be arranged on the working surface 21. The axes of the stoppers 23 are perpendicular to the working surface 21, and the distance between them corresponds to the spacing between the bottoms of the two V-shaped grooves.

[0079] During actual operation, when the workpiece W and the body 11 are placed on the work surface 21, the workpiece W can be initially aligned horizontally by placing the bottoms of the two V-shaped grooves against the stoppers 23. This not only ensures that the workpiece W quickly enters the preset processing position, but also reduces offset caused by human placement errors, thereby optimizing the subsequent precise positioning process. In addition, because the position of the stoppers 23 is predetermined, the position of the positioning unit 22 of the processing equipment 2 can be set in advance, allowing the marking portion 13 to be quickly recognized by the positioning unit 22, thereby improving overall positioning and processing efficiency.

[0080] It is worth noting that the stopper 23 achieves preliminary alignment by merely abutting against the body 11 externally, without applying any additional clamping force to the body 11. Therefore, excessive external force will not cause deformation or damage to the body 11. This non-mandatory stopper not only avoids stress concentration caused by uneven clamping force, but also ensures that the workpiece W maintains its original geometric accuracy during machining, avoiding machining errors caused by deformation.

[0081] Further, the use of the auxiliary positioning part 15 can ensure that the identification accuracy of the positioning unit 22 is not disturbed by external factors, thereby ensuring that the identification result of the marking part 13 is always accurate and reliable. Since the accurate identification of the marking part 13 is the key to ensuring that the processing equipment 2 achieves high-precision processing, through the reasonable cooperation of the auxiliary positioning part 15 and the limiting part 23, the identification error of the marking part 13 can be reduced, and the processing consistency can be improved. In addition, this auxiliary positioning scheme is applicable to workpieces W of different sizes and shapes, and is not limited to disc-shaped workpieces, but can be adaptively adjusted according to the specific structural features of the workpiece W to meet different processing needs.

[0082] It should be noted that the specific implementation form of the auxiliary positioning part 15 and the limiting part 23 is not limited to the above embodiment. For example, the auxiliary positioning part 15 can adopt a V-shaped groove, a semicircular groove, etc., and the limiting part 23 can adopt a columnar, wedge-shaped or track limiting structure to adapt to different types of workpieces W. In addition, by reasonably arranging the positions of the auxiliary positioning part 15 and the limiting part 23, the clamping process of the workpiece W can be further optimized, so that it can quickly enter the predetermined processing position, improve the positioning efficiency, and reduce the human placement error. This adjustable auxiliary positioning scheme not only improves the universality of clamping, but also enhances the stability of processing, providing reliable support for high-precision processing.

[0083] As set forth above, the workpiece W can be fixedly attached to the working surface 21 in a variety of ways. Specifically, in some embodiments of the present disclosure, the workpiece W can be fixed to the working surface 21 at the edge of the surface to be processed of the workpiece W by a second connecting assembly 16. Figure 9 and Figure 10 As shown, the second connecting assembly 16 can be used to fix the workpiece W to the working surface 21 at the edge of the surface to be processed of the workpiece W.

[0084] Similar to the first connecting assembly 12, the second connecting assembly 16 detachably fixes the workpiece W to the working surface 21. The second connecting assembly 16 is also configured to enable the target points on the first surface to be processed S1 and the second surface to be processed S2 to be completely exposed, i.e., the second connecting assembly 16 does not block the target points, thereby ensuring that the processing operation on the target points can be carried out smoothly.

[0085] In some embodiments of the present disclosure, referring to Figure 9 A plurality of second connecting assemblies 16 can be provided, and these second connecting assemblies 16 are arranged in a spaced manner around the center of the workpiece W in the circumferential direction of the workpiece W. Through this arrangement, the second connecting assemblies 16 can uniformly distribute the connecting force, reduce the stress concentration problem caused by single-point fixing, and improve the stability of the workpiece W. In addition, the discrete arrangement of the second connecting assemblies 16 can ensure that the workpiece W does not deform significantly during the fixing process, thereby avoiding the influence of the subsequent processing accuracy caused by uneven clamping force.

[0086] Further, in some embodiments of the present disclosure, referring to Figure 10 The body 11 further comprises a recess 17 provided on the inner wall of the through portion 111, the recess 17 opening towards the center of the through portion and penetrating the body 11 along the thickness direction.

[0087] The recess 17 can constitute a relief portion, which is configured to allow the second connecting assembly 16 to pass through the body 11 along the thickness direction of the body 11, so that the second connecting assembly 16 does not contact the body 11 when the workpiece W is fixed on the working surface 21 by the second connecting assembly 16.

[0088] The through portion 111 of the body 11 can be designed according to the circumferential profile of the workpiece W. For example, when the circumferential profile of the workpiece W is circular, the through portion 111 can have a substantially circular cross section with a radial dimension slightly larger than the outer diameter of the workpiece W, so that the through portion 111 can be arranged around the circumferential portion C1 of the workpiece W with a certain gap therebetween. This design helps to ensure that the first connecting assembly 12 can smoothly fix the workpiece W and the body 11 together, while avoiding deformation or damage of the two due to mutual extrusion, thereby improving the overall assembly accuracy.

[0089] The recess 17 can provide sufficient space for the second connecting assembly 16 to pass through. For example, the recess 17 can be formed by removing part of the circumferential wall of the through portion 111 along the thickness direction of the body 11, so that the recess 17 opens towards the center of the through portion 111. The cross-sectional dimension of the recess 17 is larger than the outer dimension of the second connecting assembly 16, so as to form a gap with the second connecting assembly 16 when the workpiece W is installed by the second connecting assembly 16, and ensure that the body 11 and the second connecting assembly 16 are spatially separated. The advantage of this structural design is that it can effectively avoid the interference of the body 11 with the second connecting assembly 16 when the workpiece W is fixed to the working surface 21, and ensure the installation stability of the workpiece W. In addition, this design can also prevent problems such as assembly difficulty and stress concentration caused by mechanical interference between different assemblies, thereby further improving the reliability and accuracy of the overall machining system.

[0090] In some embodiments of the present disclosure, referring to Figure 11 The marking portion 13 can comprise two parts, wherein the two parts are respectively arranged on the first surface 11A and the second surface 11B of the body 11, and the positions of the two parts relative to each other are fixed.

[0091] As described above, the marking portion 13 can take various forms as long as it can be accurately recognized by the positioning unit 22. However, in some application scenarios, the marking portion 13 needs to meet higher accuracy requirements. For example, in a double-sided drilling process, in order to ensure the accuracy, especially the coaxiality, of drilling from both sides of the workpiece W, the correspondence of the marking portion 13 on the first surface 11A and the second surface 11B of the body 11 is crucial. If there is an error in the position of the two sides of the marking portion 13, it may cause the deviation of the drilling path, so that the drilling from both sides cannot be accurately butt-jointed.

[0092] The marking portion 13 can include a through hole that penetrates the body 11 in a direction perpendicular to the working surface 21. That is, the marking portion 13 can take the form of a through hole that penetrates in the thickness direction of the body 11. The marking portion 13 in the form of a through hole can provide stable and high-precision marking information to facilitate accurate recognition by the positioning unit 22 of the processing equipment 2. As shown in FIG. 2, the marking portion 13 in the form of a through hole forms two apertures on the first surface 11A and the second surface 11B of the body 11. The two apertures constitute a first portion 13A and a second portion 13B of the marking portion 13. By obtaining the positions of the first portion 13A and the second portion 13B, the predetermined processing positions on the first processing surface S1 and the second processing surface S2 of the workpiece W can be correspondingly obtained. Figure 11

[0093] The marking portion 13 in the form of a through hole can effectively improve the accuracy. On the one hand, the forming process of the through hole is relatively simple, and since it directly penetrates the thickness direction of the body 11, it will not be displaced or deformed due to local stress or temperature change, ensuring its stability for a long time. On the other hand, the position of the through hole form marking portion 13 on the first surface 11A and the second surface 11B of the body 11 naturally corresponds, thereby avoiding the processing error that may be caused by independently setting two marking points. This means that, compared with the scheme of setting two marking points on the two sides of the body 11 respectively, the through hole marking portion 13 only needs to be processed once, and it can ensure that it maintains a strict alignment relationship on the two sides of the body 11, thereby improving the accuracy of the first position obtained subsequently.

[0094] In addition, the form of the through hole also has the advantage of universality, which can be applied to various types of recognition methods of the positioning unit 22. For example, in a contact measurement system, a Renishaw probe can accurately determine the first position by detecting the shape, size and position of the through hole. In a non-contact measurement system, such as an optical measurement device such as a laser displacement sensor, a machine vision system or a confocal microscope, the first position can be determined by size measurement and positioning of the through hole. The two measurement methods can be selected according to the specific application requirements to meet different accuracy requirements and the adaptability of the measurement environment, thereby improving the stability and universality of the overall positioning. ​

[0095] The method of positioning the workpiece W on the working surface 21 using the positioning tool 1 will be described below based on the above embodiments.

[0096] Specifically, first, the workpiece W can be placed in the through portion 111 of the body 11 of the positioning tool 1, and the stop portion 14 can be allowed to contact the circumferential portion C1 of the workpiece W, so as to preliminarily fix the workpiece W in the body 11 with its to-be-processed surface exposed.

[0097] Next, the workpiece W can be further fixed to the body 11 through the first connecting assembly 12, wherein in the case that the thickness of the body 11 is less than the thickness of the workpiece W, the workpiece W is fixed in the through portion 111 to extend out from both ends thereof.

[0098] Then, the workpiece W fixed together with the positioning tool 1 is placed on the working surface 21, so that the workpiece W will at least partially conform to the working surface 21, while the body 11 is spaced apart from the working surface 21, and the mark portion 13 and the target point on the to-be-processed surface of the workpiece W are simultaneously exposed. In this state, the position of the mark portion 13 can be directly obtained, for example, the coordinate information of the mark portion 13 can be obtained. Finally, the position of the target point on the workpiece W, that is, the predetermined processing position, can be obtained by using the position of the mark portion 13. In the case that the auxiliary positioning portion 15 is provided, the auxiliary positioning portion 15 can be used to abut against the limiting portion 23 to facilitate the workpiece W to be located in the predetermined area on the working surface 21.

[0099] In the case that double-sided processing is required to be performed on the workpiece W, after the above steps are completed and the predetermined processing position on one to-be-processed surface of the workpiece W is processed, the workpiece W together with the positioning tool 1 can be turned over and then placed on the working surface 21 again, and the above steps are performed again, and then the predetermined processing position on the other to-be-processed surface of the workpiece W is processed.

[0100] In order to prevent the workpiece W from being displaced during processing, before the workpiece W is placed on the working surface 21 and before the processing operation is performed, the workpiece W can be temporarily fixed on the working surface 21 by using the second connecting assembly 16, wherein the second connecting assembly 16 can fix the workpiece W through the groove 17 without contacting the components of the positioning tool 1.

[0101] In summary, referring to Figure 14Some embodiments of the present disclosure also provide a workpiece positioning method for positioning a workpiece W on a work surface 21 by using the positioning tool 1 according to the above. The method can include the following steps: S01, fixing the workpiece W to the body 11 of the positioning tool 1 by the first connecting assembly 12 of the positioning tool 1; S02, placing the positioning tool 1 and the workpiece W on the work surface 21; S03, obtaining the position of the marking portion 13 provided on the body 11; and S04, obtaining a predetermined machining position on the workpiece W according to the position of the marking portion 13. In the case where the body 11 includes a through portion 111 extending through the thickness direction of the body 11, the first connecting assembly 12 includes two clamping portions applying opposite forces in the thickness direction, and the maximum distance between the two clamping portions in the thickness direction is greater than the thickness of the body 11, the step S01 can include fixing the workpiece W in the through portion 111 of the body 11 by the two clamping portions of the first connecting assembly 12, and the step S02 can include placing the positioning tool 1 and the workpiece W on the work surface such that the body 11 is spaced apart from the work surface 21.

[0102] Referring to Figure 12 Some embodiments of the present disclosure also provide a tool set 10. The tool set 10 includes a base plate 10A for carrying a workpiece W and the positioning tool 1 according to the above.

[0103] The base plate 10A can have two opposite surfaces, i.e. a first surface 101A and a second surface 101B, wherein the first surface 101A can serve as a work surface for fixing the workpiece W, and the second surface 101B of the base plate 10A can be used for fixing to a machining device, for example, to a drilling device, so as to facilitate the machining device to perform corresponding machining operations on the workpiece W.

[0104] In some embodiments of the present disclosure, referring to Figure 12 The tool set 10 can further include a second connecting assembly 16 for fixing the workpiece W to the work surface, i.e. the first surface 101A. The arrangement of the second connecting assembly 16 and the use thereof have been described in detail above, and will not be repeated here.

[0105] In some embodiments of the present disclosure, referring to Figure 12 The first surface 101A can be provided with a receiving portion 101C. The receiving portion 101C is used to partially accommodate the portion of the positioning tool 1 protruding from the body 11 in the thickness direction thereof.

[0106] As Figure 12As shown, some components in the positioning tool 1 can protrude from the body 11 in the thickness direction of the body, even partially on the first and second surfaces S1 and S2 to be machined of the workpiece W, such as the first and second clamping portions 12A and 12B. In order to ensure that the workpiece W remains stable when being machined, it is desirable that the un-machined surface of the workpiece W can be in close contact with the working surface of the base plate to the greatest extent, so as to provide stable support for the workpiece by the base plate. However, components such as the first and second clamping portions 12A and 12B can separate the working surface from the workpiece W, so that the workpiece W cannot be in close contact with the working surface. The position of the accommodation portion 101C can correspond to these portions protruding from the body, and the size and dimensions of the accommodation portion 101C are also set to be able to accommodate these portions. Based on this, when the positioning tool 1 is placed on the working surface, i.e. the first surface 101A, together with the workpiece W, a portion of the positioning tool 1 is accommodated by the accommodation portion 101C, so that the workpiece W can be placed in close contact on the working surface, thus obtaining stable support.

[0107] In some embodiments of the present disclosure, referring to Figure 12 In the case where the positioning tool 1 comprises an auxiliary positioning portion 25 arranged on the circumferential surface of the body 11 and exposed to the circumferential surface of the body 11, a limiting portion 23 is further arranged on the first surface 101A, wherein the limiting portion 23 is arranged to abut against the auxiliary positioning portion 25. The limiting portion 23 has been specifically described above, and will not be described here again.

[0108] Referring to Figure 13 Some embodiments of the present disclosure also provide a machining device 2. The machining device 2 can comprise a positioning unit 22 and the positioning tool 1 according to the above, wherein the positioning unit 22 is configured to detect the marking portion 13 arranged on the body 11 of the positioning tool 1, to obtain the predetermined machining position of the workpiece W mounted in the body 11 according to the position of the marking portion obtained.

[0109] In some embodiments of the present disclosure, referring to Figure 13 The machining device 2 can have a working surface 21 for placing the workpiece W, and the machining device 2 can further comprise a second connecting assembly 16 for fixing the workpiece W to the working surface 21.

[0110] In some embodiments of the present disclosure, referring to Figure 13 The working surface 21 can be provided with an accommodation portion 101C, which can be used to partially accommodate the portion of the positioning tool 1 protruding from the body 11 of the positioning tool 1 in the thickness direction thereof.

[0111] In some embodiments of the present disclosure, in the case where the positioning tool 1 comprises the auxiliary positioning portion 15 arranged on the circumferential surface of the body 11 and exposed to the circumferential surface of the body, a limiting portion 23 can also be arranged on the working surface 21, wherein the limiting portion 32 is arranged to be capable of abutting against the auxiliary positioning portion 15.

[0112] It should be noted that the technical solutions disclosed in the embodiments of the present disclosure can be combined arbitrarily without conflict.

[0113] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A positioning tool, characterized in that: The positioning tooling includes: ontology; a first connecting assembly for fixing a workpiece to the body; A marking portion is provided on the body, and a position of the marking portion relative to the body is fixed so as to allow a predetermined processing position on the workpiece mounted in the body to be obtained according to the position of the marking portion.

2. The positioning tool according to claim 1, characterized in that: The body has a through portion penetrating along a thickness direction of the body, and the workpiece is fixed in the through portion by the first connecting component.

3. The positioning tool according to claim 2, characterized in that: The first connecting component is configured to apply forces toward each other along the thickness direction of the body.

4. The positioning tool according to claim 2, characterized in that: The positioning tool further includes a stopper, which is configured to protrude from the inner peripheral wall of the through portion toward the center of the through portion.

5. The positioning tool according to claim 3, characterized in that: The first connecting assembly includes two clamping parts for applying the opposite forces, wherein a maximum distance between the two clamping parts in the thickness direction is greater than the thickness of the body.

6. The positioning tool according to any one of claims 1 to 5, characterized in that: The positioning tool further includes an auxiliary positioning portion, which is provided on the circumferential surface of the body and exposed on the circumferential surface of the body.

7. The positioning tool according to any one of claims 1 to 5, characterized in that: The body has two surfaces opposite to each other in a thickness direction thereof, and the marking portion includes two parts, wherein the two parts are respectively provided on the two surfaces and positions of the two parts relative to each other are fixed.

8. The positioning tool according to claim 2, characterized in that: The body further includes a groove provided on an inner peripheral wall of the through portion, the groove opening toward a center of the through portion and penetrating the body along the thickness direction.

9. A workpiece positioning method, characterized in that: The workpiece positioning method is used to position a workpiece on a work surface by using the positioning fixture according to any one of claims 1 to 8, the method comprising: fixing the workpiece to the body of the positioning fixture via the first connecting assembly of the positioning fixture; placing the positioning fixture and the workpiece on a work surface; obtaining a position of a marking portion provided on the body; obtaining a predetermined processing position on the workpiece according to the position of the marking portion, The body includes a through portion extending along the thickness direction of the body, the first connecting assembly includes two clamping portions applying opposite forces along the thickness direction, and the maximum spacing between the two clamping portions in the thickness direction is greater than the thickness of the body, and, Wherein, fixing the workpiece to the body of the positioning fixture by the first connecting component of the positioning fixture comprises: fixing the workpiece in the through-hole portion of the body by the two clamping parts of the first connecting component, and Placing the positioning fixture and the workpiece on the work surface includes placing the positioning fixture and the workpiece on the work surface such that the body is spaced apart from the work surface.

10. A tool kit, characterized in that: The tool kit comprises a base plate for carrying a workpiece and a positioning tool according to any one of claims 1 to 8.

11. The tooling kit according to claim 10, wherein: The base plate has a working surface for placing the workpiece, and the tool kit further includes a second connecting component for fixing the workpiece to the working surface.

12. The tooling kit according to claim 11, wherein: An accommodating portion is provided on the working surface, and the accommodating portion is used to partially accommodate a portion of the positioning tool protruding from the body of the positioning tool along the thickness direction thereof.

13. The tooling kit according to claim 11 or 12, characterized in that: In the case where the positioning tool includes an auxiliary positioning portion provided on and exposed to the circumferential surface of the body, a limiting portion is further provided on the working surface, wherein the limiting portion is configured to abut against the auxiliary positioning portion.

14. A processing equipment, characterized in that The processing equipment includes a positioning unit and a positioning tool according to any one of claims 1 to 8, wherein the positioning unit is configured to detect a marking portion provided on a body of the positioning tool to obtain a predetermined processing position on a workpiece installed in the body according to the position of the marking portion.

15. The processing equipment according to claim 14, characterized in that The processing equipment has a working surface for placing the workpiece, and the processing equipment further includes a second connecting component for fixing the workpiece to the working surface.

16. The processing equipment according to claim 15, characterized in that An accommodating portion is provided on the working surface, and the accommodating portion is used to partially accommodate a portion of the positioning tool protruding from the body of the positioning tool along the thickness direction thereof.

17. The processing equipment according to claim 15 or 16, characterized in that In the case where the positioning tool includes an auxiliary positioning portion provided on and exposed to the circumferential surface of the body, a limiting portion is further provided on the working surface, wherein the limiting portion is configured to abut against the auxiliary positioning portion.

Images