Tooling assembly for machining parts with eccentric holes

Abstract

A processing tooling assembly for processing parts with eccentric holes, wherein an eccentric hole is provided on the target workpiece, and the eccentric distance between the hole axis of the eccentric hole and the axis of the target workpiece is L. The processing tooling assembly for processing parts with eccentric holes includes: a first tooling, wherein the first tooling includes a first assembly head for clamping and cooperating with a three-jaw chuck of a processing equipment, and a first clamping groove for clamping the workpiece to be processed is provided on the first tooling, wherein the first clamping groove is an eccentric groove, and the eccentric distance between the axis of the first clamping groove and the axis of the first assembly head is L. The first tooling provided by the present invention is capable of processing eccentric holes. In addition, in order to meet the eccentricity and coaxiality requirements of the eccentric hole, the present invention adopts CNC lathe processing, and at the same time cooperates with the use of the first tooling designed by the present invention, so that the workpiece to be processed does not need to be aligned during use, thereby achieving the purpose of improving processing efficiency and reducing production costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical processing auxiliary tooling, and more specifically, particularly relates to a processing tooling assembly for processing parts with eccentric holes. Background Art

[0002] In the mechanical field, some mechanical equipment is equipped with components with eccentric holes. For example, a certain type of timing device has at least two eccentric holes on its base part (the core part of the timing device). As the key part of the timing device, the base part has high dimensional accuracy requirements during manufacturing, especially the eccentric holes set on the base part, and the positional accuracy of the eccentric holes is required to be even higher.

[0003] Currently, for parts with eccentric hole structures like the aforementioned base parts, which require high machining precision, using traditional processing techniques presents many problems. For example, when using traditional processing techniques to process a part, a technician (such as a fitter) must first draw a cross centerline on the eccentric circle (the eccentric circle set on the part) to ensure the eccentric size. A four-claw lathe is then used to align the center of the eccentric hole. The eccentric hole is formed through a turning process, and the center of the part is then aligned, and the outer circle is turned to form the part. If there are multiple eccentric holes, each one needs to be centered once.

[0004] Traditional processing technology requires multiple attempts to find the center of the circular hole, which will lead to problems such as low efficiency in mass production of parts and high production costs. Summary of the Invention

[0005] (1) Technical issues

[0006] In summary, how to solve the problem of low processing efficiency caused by multiple alignments required when processing parts with eccentric holes using traditional processes has become an urgent problem to be solved by those skilled in the art.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The present invention provides a machining tool assembly for machining a part with an eccentric hole, wherein the part with an eccentric hole is a target workpiece, an eccentric hole is provided on the target workpiece, and the eccentric distance between the hole axis of the eccentric hole and the axis of the target workpiece is L.

[0010] In the present invention, the processing tooling assembly for processing parts with eccentric holes includes: a first tooling, the first tooling includes a first assembly head for clamping and cooperating with a three-jaw chuck of a processing equipment, and a first clamping groove for clamping the workpiece to be processed is provided on the first tooling, the first clamping groove is an eccentric groove, and the eccentricity between the axis of the first clamping groove and the axis of the first assembly head is L.

[0011] Preferably, in the processing tooling assembly for processing parts with eccentric holes provided by the present invention, a tightening screw is provided on the first tooling, one end of the tightening screw can be inserted into the first clamping slot for clamping the workpiece to be processed; at least three tightening screws are provided, and all of the tightening screws are arranged at equal intervals around the axis of the first clamping slot.

[0012] Preferably, the processing tooling assembly for processing parts with eccentric holes provided by the present invention also includes a second tooling; the second tooling includes a second assembly head and a chuck for clamping with the three-jaw chuck of the processing equipment, and the chuck can be assembled to one end of the first eccentric hole formed in the workpiece to be processed, and is used for turning the eccentric small boss on the other end of the first eccentric hole formed in the workpiece to be processed, and the second assembly head is coaxially arranged with the chuck.

[0013] Preferably, in the machining tool assembly for machining parts with eccentric holes provided by the present invention, the chuck is threadedly engaged with one end of the first eccentric hole formed in the workpiece to be machined.

[0014] Preferably, the processing tooling assembly for processing parts with eccentric holes provided by the present invention further includes a disassembly clamp, which can be detachably clamped onto the workpiece to be processed and is used for disassembly between the workpiece to be processed and the second tooling.

[0015] Preferably, in the processing tooling assembly for processing parts with eccentric holes provided by the present invention, at least two eccentric holes are provided on the target workpiece, one of the eccentric holes is the first eccentric hole, the other of the eccentric holes is the second eccentric hole, and the distance between the hole axis of the first eccentric hole and the hole axis of the second eccentric hole is D; a third tooling is also included; the third tooling includes a tooling body for clamping with a three-jaw chuck of a processing equipment, the tooling body includes a tooling body large groove for clamping one end of the workpiece to be processed with an eccentric small boss, and a tooling body small groove for clamping the eccentric small boss is provided at the bottom of the tooling body large groove; the distance between the axis of the tooling body small groove and the axis of the tooling body is D.

[0016] Preferably, in the processing tooling assembly for processing parts with eccentric holes provided by the present invention, a first fixed pull rod is provided on the third tooling and passes through the small groove of the tooling body, and the workpiece to be processed is fixed on the third tooling by the first fixed pull rod.

[0017] Preferably, in the processing tooling assembly for processing parts with eccentric holes provided by the present invention, a counterweight block is provided on the third tooling, and the counterweight block and the small groove of the tooling body are symmetrically arranged with the axis of the tooling body as the center of symmetry.

[0018] Preferably, in the tooling assembly for machining parts with eccentric holes provided by the present invention, the counterweight block is detachably mounted on the tooling body by bolts.

[0019] Preferably, the processing tooling assembly for processing parts with eccentric holes provided by the present invention also includes a fourth tooling, on which at least one second fixed pull rod for cooperating with the eccentric hole is provided; the axis of the fourth tooling is coaxially arranged with the axis of the target workpiece.

[0020] (3) Beneficial effects

[0021] The present invention provides a tooling assembly for processing a part with an eccentric hole, wherein the part with an eccentric hole is a target workpiece, an eccentric hole is provided on the target workpiece, and the eccentric distance between the hole axis of the eccentric hole and the axis of the target workpiece is L. Specifically, the tooling assembly for processing a part with an eccentric hole comprises: a first tooling, wherein the first tooling comprises a first assembly head for clamping and cooperating with a three-jaw chuck of a processing device, and a first clamping groove for clamping a workpiece to be processed is provided on the first tooling, wherein the first clamping groove is an eccentric groove, and the eccentric distance between the axis of the first clamping groove and the axis of the first assembly head is L. Through the above-mentioned structural design, the first tooling provided by the present invention can process eccentric holes. In addition, in order to meet the eccentricity and coaxiality requirements of the eccentric hole, the present invention adopts CNC lathe processing, and at the same time cooperates with the use of the first tooling designed by the present invention, so that the workpiece to be processed does not need to be aligned during use, thereby achieving the purpose of improving processing efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1A schematic structural diagram of an object workpiece according to an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the first workpiece in an embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the first workpiece in use according to an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the second workpiece in an embodiment of the present invention;

[0027] Figure 5 This is a schematic structural diagram of the second workpiece in use according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic structural diagram of a third workpiece in an embodiment of the present invention;

[0029] Figure 7 This is a schematic structural diagram of the third workpiece in use according to an embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the structure of the fourth workpiece in an embodiment of the present invention;

[0031] Figure 9 Schematic diagram of the structure of the fourth workpiece in use according to an embodiment of the present invention.

[0032] exist Figures 1 to 9 , the corresponding relationship between component names and reference numerals is as follows:

[0033] Target workpiece 1, first eccentric hole 1a, second eccentric hole 1b;

[0034] First tooling 2, first slot 2a;

[0035] Second tooling 3, clamping head 3a;

[0036] The third tool 4, the tool body large groove 4a, the tool body small groove 4b;

[0037] The fourth tooling 5 and the second fixed pull rod 5a. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0039] In addition, in the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] Please refer to Figures 1 to 9 ,in:

[0041] Figure 1 A schematic structural diagram of an object workpiece according to an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the structure of the first workpiece in an embodiment of the present invention;

[0043] Figure 3 This is a schematic structural diagram of the first workpiece in use according to an embodiment of the present invention;

[0044] Figure 4 Schematic diagram of the structure of the second workpiece in an embodiment of the present invention;

[0045] Figure 5 This is a schematic structural diagram of the second workpiece in use according to an embodiment of the present invention;

[0046] Figure 6 This is a schematic structural diagram of a third workpiece in an embodiment of the present invention;

[0047] Figure 7 This is a schematic structural diagram of the third workpiece in use according to an embodiment of the present invention;

[0048] Figure 8 Schematic diagram of the structure of the fourth workpiece in an embodiment of the present invention;

[0049] Figure 9 Schematic diagram of the structure of the fourth workpiece in use according to an embodiment of the present invention.

[0050] The present invention provides a processing tooling assembly for processing parts with eccentric holes. The processing tooling assembly for processing parts with eccentric holes provided by the present invention (hereinafter referred to as the processing tooling assembly) is suitable for processing a target workpiece 1 with an eccentric hole. The processing specifically refers to the processing of the blank to be processed, processing the blank to be processed into the target workpiece 1, and the processing operations include drilling the eccentric hole, turning the outer circle of the workpiece as a whole, and other operations.

[0051] In a specific embodiment of the present invention, the object workpiece 1 of the processing tooling assembly provided by the present invention has two eccentric holes, and the overall contour shape of the object workpiece 1 is approximately a cylindrical structure. Among the two eccentric holes, one of the eccentric holes is a first eccentric hole 1a, and the object workpiece 1 has an eccentric small boss structure corresponding to the first eccentric hole 1a, wherein the other eccentric hole is a second eccentric hole 1b, and the hole axes of the two eccentric holes are eccentric relative to the axis of the object workpiece 1. In order to facilitate the definition of structural dimensions, it is defined here: the part with eccentric holes is the object workpiece 1, and two eccentric holes are provided on the object workpiece 1. The eccentricity between the hole axis of the first eccentric hole and the axis of the object workpiece 1 is L, and the distance between the hole axis of the first eccentric hole 1a and the hole axis of the second eccentric hole 1b is D.

[0052] For the processing of the above-mentioned target workpiece 1 (processing the blank into the target workpiece 1), the processing tooling assembly provided by the present invention for processing parts with eccentric holes provides a total of four toolings, namely the first tooling 2, the second tooling 3, the third tooling 4 and the fourth tooling 5, among which the first tooling 2 is used to process the first eccentric hole 1a, the second tooling 3 is used to process the eccentric small boss, the third tooling 4 is used to process the second eccentric hole 1b, and the fourth tooling 5 is used to process the external contour.

[0053] Specifically, for the first tool 2.

[0054] The first tooling 2 is an integral component made of metal material. The first tooling 2 includes a first assembly head for clamping and fitting with a three-jaw chuck (a fixed tooling used on a machine tool, with three linked jaws, which can clamp and fix the workpiece, especially the cylindrical structural parts) of a processing equipment (the present invention is preferably a digital machine tool, which has higher processing accuracy. Of course, it can also be an ordinary machine tool, and the processing accuracy can also be guaranteed). The first assembly head is a cylindrical structure (or a disc-type structure). A first clamping groove 2a for clamping the workpiece to be processed is provided on the first tooling 2. Along the axial direction of the first assembly head, one end of the first tooling 2 is the first assembly head, and the other end of the first tooling 2 is provided with a first clamping groove 2a. The first clamping groove 2a is a circular groove structure (the blank is generally a cylindrical blank structure). The first clamping groove 2a is an eccentric groove, that is, the first clamping groove 2a is eccentric relative to the first assembly head, and the eccentricity between the axis of the first clamping groove 2a and the axis of the first assembly head is L.

[0055] The present invention also provides a tightening screw on the first tooling 2, which is arranged on the groove wall constituting the first slot 2a. The tightening screw and the groove wall are threadedly connected. One end of the tightening screw can be inserted into the first slot 2a to clamp the workpiece to be processed. The blank is assembled into the first slot 2a, and then the tightening screw is rotated and screwed so that the top end of the tightening screw is against the blank, thereby clamping and fixing the blank in the first slot 2a.

[0056] Furthermore, there are at least three (preferably three) tightening screws, all of which are arranged at equal intervals around the axis of the first slot 2a, and the axis of the tightening screw passes through the axis of the first slot 2a, so that the blank can be fixed by applying pressure to the surface of the blank by tightening the screws.

[0057] Specifically, for the second tool 3 .

[0058] The second tooling 3 is a stepped boss structure, and is made of metal material. The second tooling 3 is an integrated structure.

[0059] The second tool 3 is used after the first tool 2. The first tool 2 can be used to process the first eccentric hole 1a on the blank. When the second tool 3 is used, the first eccentric hole 1a on the blank has been processed.

[0060] The second tooling 3 includes a second assembly head (the second assembly head is cylindrical or disc-shaped and can be assembled to the processing equipment via the three-jaw chuck) for engaging with the three-jaw chuck of the processing equipment, and a chuck 3a (the chuck 3a is a structure that engages with the first eccentric hole 1a). The chuck 3a can be assembled to one end of the first eccentric hole 1a formed in the workpiece to be processed and is used to turn the eccentric boss at the other end of the first eccentric hole 1a formed in the workpiece. The second assembly head and chuck 3a are coaxially arranged. The target workpiece 1 is provided with a first eccentric hole 1a and a second eccentric hole 1b. Along the axial direction of the first eccentric hole 1a (or the axial direction of the second eccentric hole 1b), one end of the target workpiece 1 is flat, and the other end of the target workpiece 1 is provided with an eccentric boss at a position corresponding to the first eccentric hole 1a. The present invention uses the first tooling 2 to machine the first eccentric hole 1a in the blank. Subsequently, the present invention requires machining the eccentric boss, so the second tooling 3 is provided. The second tooling 3 is provided with a second assembly head and a chuck 3a. The chuck 3a is used to be fixedly assembled with one end of the first eccentric hole 1a. The second assembly head can be assembled to the three-jaw chuck of the processing equipment. The blank can be assembled to the processing equipment through the second tooling 3.

[0061] Furthermore, the chuck 3a is threadably engaged with one end of the first eccentric hole 1a formed in the workpiece to be processed.

[0062] The chuck 3a is threadedly engaged with the workpiece to be processed (i.e., the aforementioned blank). During the process of turning the eccentric small boss on the workpiece, the fit between the workpiece to be processed and the chuck 3a becomes increasingly tight (for example, when turning the workpiece, the turning tool rotates clockwise. By designing the direction of rotation of the threads between the chuck 3a and the workpiece to be processed, the force exerted by the turning tool on the workpiece can be converted into a tightening force between the workpiece to be processed and the chuck 3a, thereby preventing the workpiece to be processed and the chuck 3a from loosening). After the eccentric small boss is processed, in order to facilitate the removal of the workpiece from the chuck 3a (the second tool 3), the present invention further provides a disassembly clamp, which is a metal clamp with bolts provided at both ends of the disassembly clamp, and the diameter of the disassembly clamp is adjusted by the bolts (the smaller the diameter, the more secure the connection between the disassembly clamp and the workpiece to be processed; conversely, the disassembly clamp can be loosened and removed from the workpiece to be processed). The disassembly clamp can be detachably mounted on the workpiece to be processed and is used for disassembly between the workpiece to be processed and the second tooling 3. After the disassembly clamp is assembled on the workpiece to be processed, it can provide force support for the rotation of the workpiece to be processed (relative to the rotation of the second tooling 3) (the blank is a cylindrical structure with a smooth curved surface and no fulcrum. After the disassembly clamp is installed on the blank, torque can be applied to the blank with the disassembly clamp as the fulcrum to rotate and disassemble it).

[0063] Specifically, for the third tooling 4 .

[0064] As can be seen from the above, at least two eccentric holes (specifically, two) are provided on the target workpiece 1, one of which is the first eccentric hole 1a, and the other is the second eccentric hole 1b.

[0065] The first eccentric hole 1a and the eccentric small boss are machined on the workpiece (blank) by the first tool 2 and the second tool 3. The third tool 4 provided by the present invention is used to machine the second eccentric hole 1b.

[0066] In the present invention, the third fixture 4 includes a fixture body (a large disc structure) for engaging with the three-jaw chuck of the processing equipment. A large fixture body groove 4a (a large circular groove structure) is provided on the fixture body for engaging the end of the workpiece to be processed, which is provided with an eccentric small boss. A small fixture body groove 4b is provided at the bottom of the fixture body groove 4a, for engaging the eccentric small boss. The axis of the small fixture body groove 4b is spaced apart from the axis of the fixture body by a distance D. In this structural design, the end of the workpiece to be processed, provided with the eccentric small boss, can be inserted into both the large fixture body groove 4a and the small fixture body groove 4b, thereby positioning and securing the workpiece.

[0067] Furthermore, a first fixed tie rod (metal tie rod) is provided on the third fixture 4 and passes through the small slot 4b of the fixture body. The workpiece to be processed is fixed to the third fixture 4 by the first fixed tie rod. The tie rod passes through the first eccentric hole 1a of the workpiece to be processed and the small slot 4b of the fixture body, and then extends through the entire third fixture 4. A nut is provided at each end of the tie rod. In this way, the workpiece to be processed and the third fixture 4 can be assembled together using the tie rod. The workpiece to be processed is then assembled to the processing equipment via the third fixture 4 (the third fixture 4 is fixed to the processing equipment via a three-jaw chuck).

[0068] To ensure that the third tooling 4 maintains balance during use, the present invention provides a counterweight on the third tooling 4. The counterweight is symmetrically arranged with the tooling body's small groove 4b, with the tooling body's axis as the center of symmetry. Furthermore, the counterweight is detachably attached to the tooling body via bolts.

[0069] Specifically, for the fourth tool 5.

[0070] The fourth fixture 5 is equipped with at least one second fixing rod 5a for engaging with the eccentric hole. The axis of the fourth fixture 5 is coaxial with the axis of the workpiece 1. The workpiece to be machined is assembled to the fourth fixture 5 by using multiple second fixing rods 5a (each second fixing rod 5a extends through an eccentric hole), thereby achieving turning of the workpiece's outer contour.

[0071] The present invention provides a processing tooling assembly for processing parts with eccentric holes. After the processing tooling assembly for processing parts with eccentric holes provided by the present invention is put into use, the traditional process scheme can be changed. Specifically, the present invention designs and manufactures a total of four sets of tooling, each set of tooling can clamp and fix the workpiece, so as to perform a specific operation. At the same time, the present invention also uses a CNC lathe for processing, and can also ensure the dimensional accuracy of the eccentric hole and improve the processing efficiency.

[0072] In order to meet the eccentricity and coaxiality requirements of the eccentric hole, the present invention adopts CNC lathe processing (the processing accuracy of CNC lathe is higher than that of traditional lathe), and at the same time uses four sets of special tooling designed by the present invention. During use, there is no need to align the workpiece being processed, thereby achieving the purpose of improving processing efficiency and reducing production costs.

[0073] The present invention mainly consists of four parts: 1. an eccentric hole turning tool (a first tool 2), a small boss turning tool (a second tool 3), an eccentric hole turning tool (a third tool 4), and a large outer circle turning tool (a fourth tool 5).

[0074] For the first tooling 2, the eccentricity of the first slot 2a (also called eccentric countersunk hole) is the same as the eccentricity of the first eccentric hole 1a on the target workpiece 1. Three threaded holes are processed on the side of the first tooling 2, and the parts can be fastened with screws to prevent vibration during processing.

[0075] The second fixture 3 is machined with threads that mate with the threads of the first eccentric hole 1a, forming an internal and external thread. The small boss can be turned by screwing it together. After machining, the cutting force causes the threads of the fixture and the part to become even tighter, requiring the removal of the part by a sudden reverse rotation of the fixture.

[0076] As for the third tool 4, the third tool 4 is a tool for turning the second eccentric hole 1b. It uses the already processed large outer circle and small boss for positioning and is fastened by a fastening rod to process the second eccentric hole 1b.

[0077] As for the fourth tooling 5, the fourth tooling 5 is positioned using the two sets of eccentric holes that have been processed, and then the large outer circle is turned to ensure that the two sets of eccentric distances are finally completed.

[0078] The following describes the parts processing process of the present invention in detail in combination with the actual clamping method of the parts:

[0079] (1) Turning the first eccentric hole 1a

[0080] Based on the eccentricity requirements of the eccentric stepped hole, the eccentric fixture is designed as shown below. After rough turning the outer diameter of the part, leaving a 2-3mm margin on one side, it is placed in the eccentric hole with an eccentricity of 17±0.09. After fastening the side with three sets of screws, the first eccentric hole 1a is then turned in sequence. This completes the first set of eccentric holes.

[0081] (2) Small boss on the back of the car

[0082] After turning the first eccentric hole 1a, a small end face boss needs to be machined. A threaded mandrel is designed to fit into the stepped hole and then be tightened to machine the small end face boss. After turning, the thread tightens due to the turning force. The part can be unscrewed in the opposite direction after the clamp is removed. This prevents thread deformation and improves clamping efficiency.

[0083] Utilizing the large outer circle and eccentric small boss of the machined part for positioning, the first eccentric hole 1a is fastened by a fixing rod, thus placing the second eccentric hole 1b at the center of rotation of the tooling. A counterweight is provided at one end to prevent the centrifugal force of high-speed rotation during processing from causing the part to vibrate.

[0084] (4) Turning the outer circle

[0085] By using the two sets of eccentric holes that have been processed and fastened with two positioning rods, the outer circle size is machined. In this way, the two sets of eccentric holes are used as positioning references to ensure the position accuracy of the eccentric holes and the outer circle.

[0086] As can be seen from the above, the present invention provides a machining tool assembly for machining parts with eccentric holes, wherein the part with an eccentric hole is a target workpiece 1, and the target workpiece 1 is provided with an eccentric hole. The eccentric distance between the axis of the eccentric hole and the axis of the target workpiece 1 is L. Specifically, the machining tool assembly for machining parts with eccentric holes includes: a first tool 2, the first tool 2 including a first assembly head for engaging with a three-jaw chuck of a machining device, and a first slot 2a for engaging the workpiece to be machined. The first slot 2a is an eccentric slot, and the eccentric distance between the axis of the first slot 2a and the axis of the first assembly head is L. Through the above structural design, the first tool 2 provided by the present invention is capable of machining eccentric holes. In addition, in order to meet the eccentricity and coaxiality requirements of the eccentric hole, the present invention adopts a CNC lathe for machining, and at the same time, uses the first tool 2 designed by the present invention. During use, there is no need to align the workpiece to be machined, thereby achieving the purpose of improving machining efficiency and reducing production costs.

[0087] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A tooling assembly for machining a part with an eccentric hole, wherein the part with an eccentric hole is a target workpiece (1), an eccentric hole is provided on the target workpiece, and the eccentric distance between the hole axis of the eccentric hole and the axis of the target workpiece is L, characterized in that: include: A first tool (2), comprising a first assembly head for engaging with a three-jaw chuck of a processing device, a first clamping groove (2a) for clamping a workpiece to be processed is provided on the first tool, the first clamping groove is an eccentric groove, and the eccentricity between the axis of the first clamping groove and the axis of the first assembly head is L; Also includes a second tool (3); The second tooling includes a second assembly head and a chuck (3a) for clamping with a three-jaw chuck of a processing device. The chuck can be assembled to one end of a first eccentric hole formed in a workpiece to be processed and is used to perform turning processing on an eccentric small boss at the other end of the first eccentric hole formed in the workpiece to be processed. The second assembly head is coaxially arranged with the chuck. At least two eccentric holes are provided on the target workpiece, one of the eccentric holes is the first eccentric hole (1a), the other of the eccentric holes is the second eccentric hole (1b), and the distance between the hole axis of the first eccentric hole and the hole axis of the second eccentric hole is D; Also includes a third tool (4); The third tooling includes a tooling body for clamping and cooperating with a three-jaw chuck of a processing device, the tooling body includes a tooling body large groove (4a) for clamping one end of a workpiece provided with an eccentric small boss, and a tooling body small groove (4b) for clamping the eccentric small boss is provided at the bottom of the tooling body large groove; The distance between the axis of the small groove of the tool body and the axis of the tool body is D.

2. The tooling assembly for machining parts with eccentric holes according to claim 1, characterized in that: A tightening screw is provided on the first tooling, one end of which can be inserted into the first clamping slot to clamp the workpiece to be processed; At least three tightening screws are provided, and all the tightening screws are arranged at equal intervals around the axis of the first slot.

3. The tooling assembly for machining parts with eccentric holes according to claim 1, characterized in that: The chuck is threadably engaged with one end of a first eccentric hole formed in the workpiece to be processed.

4. The tooling assembly for machining parts with eccentric holes according to claim 3, characterized in that: It also includes a disassembly clamp, which can be detachably clamped onto the workpiece to be processed and is used for disassembly between the workpiece to be processed and the second tooling.

5. The tooling assembly for machining parts with eccentric holes according to claim 1, characterized in that: A first fixing rod is provided on the third tool and passes through the small groove of the tool body, and the workpiece to be processed is fixed on the third tool through the first fixing rod.

6. The tooling assembly for machining parts with eccentric holes according to claim 1, characterized in that: A counterweight block is provided on the third tooling, and the counterweight block and the small groove of the tooling body are symmetrically arranged with the axis of the tooling body as the symmetry center.

7. The tooling assembly for machining parts with eccentric holes according to claim 6, characterized in that: The counterweight block is detachably mounted on the tool body via bolts.

8. The tooling assembly for machining parts with eccentric holes according to claim 1, characterized in that: It also includes a fourth tool (5), on which at least one second fixed pull rod (5a) is provided for cooperating with the eccentric hole; The axis of the fourth tool is coaxially arranged with the axis of the target workpiece.

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