An irregular shaped part fixture and method of use

Abstract

The application discloses a special-shaped part tool clamp and a use method, and relates to the technical field of clamps, and aims to solve the problem of deformation of holes on the edge of a special-shaped thin plate, and to solve the technical problem of interference during clamping of special-shaped parts with uneven structure distribution and irregular shape, and belongs to the technical field of clamps. The application comprises a claw base and an adjusting bolt. The claw base comprises a central shaft, one end of the central shaft is provided with a circular boss one, and the other end is provided with a circular boss two. A stud is fixed to the outside of the circular boss one. The stud is equipped with a fastening nut. A plurality of clamping claws are connected to the circumferential surface of the central shaft in the radial direction. Threaded holes are arranged on all the clamping claws close to the top in the direction of the parallel central shaft axis. The adjusting bolt is screwed into the threaded holes. The special-shaped part tool clamp is designed to adapt to the shape characteristics and processing characteristics of the part, and to achieve the purpose of making a plurality of threaded holes and light holes on the special-shaped part of the thin plate and meeting the corresponding tolerances and position degrees.

Description

Technical Field

[0001] This invention belongs to the field of fixture technology, and specifically relates to a tooling fixture for irregularly shaped parts and its usage method. Background Technology

[0002] like Figure 1 As shown, when drilling holes in a certain part, four M5 threaded holes, four φ5 through holes, and one φ4.5 through hole need to be machined on the φ284 circumference of an annular surface with a width of 16mm and a thickness of 3mm. The main body cover plate 43 of the part is welded to the W-shaped plate 41 and the cylindrical recess on both sides to form a whole, and the W-shaped weld and the recess weld are almost tightly connected.

[0003] Due to interference from the weld seams of the parts, conventional disc-shaped clamps cannot fit tightly against the annular surface and therefore cannot support the annular surface.

[0004] Even if a corresponding hollowed-out W shape is milled into a conventional disc-shaped fixture, the interference of the weld seam makes it impossible for the disc-shaped fixture to fit tightly against the annular surface, thus failing to achieve the purpose of supporting the annular surface.

[0005] If the process adopts a machining-then-welding flow, a conventional disc-shaped fixture can be used to clamp the main cover plate 43. After clamping the main cover plate 43 with the disc-shaped fixture, the holes are machined first, and then the W-shaped plate 41 is welded. However, this method will affect the position of the holes due to welding thermal stress, thus affecting the final assembly effect.

[0006] like Figure 1-3 As shown, the detailed characteristics of a certain part are as follows: (1) The part is generally formed by a 9mm thick boss with a central hole and a 15mm thick ring with a 3mm thick middle section, and a 3mm thick edge on the outer side of the 15mm thick ring. The thickness varies along the radial direction, and a cylindrical recess with a thickness of 1.5mm and a W-shaped plate 41 with a thickness of 2mm are welded on the front and back sides respectively.

[0007] from Figure 1 From the front view, the main body cover plate 43 is disc-shaped. On the edge, a φ284 circle with a thickness of only 3mm has four M5 threaded holes, four φ5 through holes, and one φ4.5 through hole evenly distributed. The central boss is 9mm thick, with a φ108 hole at its center. A 2mm thick W-shaped thin plate is welded directly below this φ108 hole. Figure 3 See, located on the right side of cover plate 43; directly below this thin plate is a φ45 hole, its center distance from the φ108 hole is 108mm, from... Figure 3 See, a cylindrical recess with a thickness of 1.5mm is welded to the left side of the φ45 hole.

[0008] (2) The design drawings require that the cover plate 43 and the cylindrical recess be welded together as a single unit, such as Figure 3The E-surface, which has a thickness of 15mm, is not allowed to be machined further.

[0009] Because using a conventional three-jaw chuck to clamp and secure the outer diameter of the machined holes often results in irregular deformation or even positional errors after being released to its natural state, there is an urgent need for a fixture for irregularly shaped parts to effectively prevent this from happening. Summary of the Invention

[0010] The purpose of this invention is to provide a tooling fixture and method for using irregularly shaped parts, which solves the problem of easy deformation of holes processed on the edges of irregularly shaped thin plates, and the technical problem of interference when clamping irregularly shaped parts due to uneven structural distribution and irregular shape. By designing a tooling fixture for irregularly shaped parts that adapts to the shape characteristics and processing characteristics of the parts, the invention achieves the goal of producing multiple threaded holes and smooth holes on thin plate irregularly shaped parts while meeting the corresponding tolerances and positional accuracy.

[0011] This invention is achieved using the following technical solution: A tooling fixture for irregularly shaped parts includes a claw seat and an adjusting bolt. The claw seat includes a central shaft. One end of the central shaft is provided with a circular boss, and the other end is provided with a circular boss. A stud is fixed to the center of the outer side of the circular boss. The stud is fitted with a fastening nut. Several claws are radially connected to the circumference of the central shaft. All claws are provided with threaded holes near the top parallel to the axis of the central shaft. The adjusting bolt is screwed into the threaded holes.

[0012] In application, the second circular boss is clamped on the three-jaw chuck of the machine tool. Then, the part is passed through the stud and the center hole of the part is clamped onto the first circular boss. The part is then fixed with a fastening nut. After initial fixing, the adjusting bolts on each jaw are adjusted so that the head of the adjusting bolt contacts the annular surface of the part, ensuring that the annular surface of the part is in a vertical plane.

[0013] A further preferred embodiment includes an antenna-shaped pressure plate, which comprises two round rods and a pressure plate. The two round rods are fixed to the pressure plate at a certain angle. The pressure plate has a light hole at its center for a stud to pass through. The space formed by the two round rods is adapted to a recess on the part. The round rods serve two purposes: first, to determine the relative position of the part when clamped to the antenna-shaped pressure plate; and second, to prevent the product from rotating along the circumferential direction.

[0014] More preferably, the pressure plate is circular in shape and its diameter is not less than the diameter of the center hole of the part, so that the pressure plate can effectively press the part.

[0015] In a further preferred embodiment, the adjusting bolt is also equipped with a lock nut.

[0016] In a further preferred embodiment, the contact area between the jaw and the anti-loosening nut is set as a plane, so that the anti-loosening nut can be screwed in as close to the jaw as possible.

[0017] More preferably, the connection between the claw and the central shaft is a fixed connection or a detachable connection.

[0018] More preferably, the claw is cylindrical or prismatic in shape.

[0019] The method of using the irregular-shaped part tooling fixture described above includes the following specific steps. Step 1: Clamp the part to be processed onto the jaw holder with a fastening nut. Place each part of the part that needs to be processed close to the nearby jaw, while the center hole of the part is clamped onto the circular boss.

[0020] Step two: Clamp the circular boss at the other end of the jaw holder onto the three-jaw chuck of the machine tool.

[0021] Step 3: Rotate the adjusting bolt to adjust the distance between the adjusting bolt head and the workpiece to be processed, so that the end face of the workpiece supported by the adjusting bolt is kept on the same vertical plane.

[0022] Step four: Begin the subsequent processes for the parts to be processed.

[0023] More preferably, the adjusting bolt is also equipped with a lock nut, and in step three, after the part to be processed is adjusted, the lock nut is tightened.

[0024] In a further preferred embodiment, in step three, the end face of the part to be processed is determined to be on the same vertical plane by using a dial indicator. The specific operation is as follows: when the dial indicator needle swings after rotating one full turn around the end face of the part to be processed, it indicates that the end face of the part to be processed is not aligned. At this time, the corresponding adjustment screw is adjusted. When the dial indicator needle does not swing after rotating one full turn around the end face of the part to be processed, it indicates that the end face of the part to be processed is kept on the same vertical plane.

[0025] Further preferably, it also includes an antenna-shaped pressure plate, which includes two round rods and a pressure plate. The two round rods are fixed to the pressure plate at a certain angle. The pressure plate has a light hole in the center for the stud to pass through. The space formed by the two round rods is adapted to the recess on the part. The pressure plate is circular in shape and its diameter is not less than the diameter of the center hole of the part. In step one, the specific method for clamping the part to be processed to the claw seat is to sequentially put the part to be processed and the antenna-shaped pressure plate onto the stud, and then tighten the fastening nut. At this time, the two round rods of the antenna-shaped pressure plate are just stuck in the recess.

[0026] This invention is a set of tooling fixtures with a reasonable shape and structure, which can reliably clamp parts on a machine tool. By adjusting the adjusting bolts, the parts can be slightly adjusted and aligned to ensure that the holes in the parts are made safely, reliably and without deformation, and in accordance with the requirements of the part drawings.

[0027] Utilizing the principles of micrometer screw gauges and double-nut anti-loosening mechanisms, the parts to be processed are precisely adjusted and tightened. Taking advantage of the uniformity of the eight claws, the supporting force on the parts is balanced with the drilling cutting force, and the processing stress is released evenly, ensuring the positional accuracy of threaded holes and smooth holes, achieving 100% pass rate on the first pass. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the front view of the irregularly shaped part in Embodiment 1.

[0031] Figure 2 Example 1 Figure 1 Schematic diagram of cross-section at point BB.

[0032] Figure 3 Example 1 Figure 1 Schematic diagram of cross-section at point AA.

[0033] Figure 4 This invention uses a front view schematic diagram.

[0034] Figure 5 This invention is illustrated using a right-view diagram.

[0035] Figure 6 This is a schematic diagram of the front view of the claw mount.

[0036] Figure 7 This is a schematic diagram of the claw mount viewed from the right.

[0037] Figure 8 This is a schematic diagram of the antenna-shaped pressure plate.

[0038] Figure 9 This is a schematic diagram of the antenna-shaped pressure plate from the right.

[0039] In the diagram: 1-claw seat, 11-central shaft, 12-circular boss one, 13-circular boss two, 14-stud, 15-fastening nut, 16-claw, 2-adjusting bolt, 21-anti-loosening nut, 3-antenna-shaped pressure plate, 31-round rod, 32-pressure plate, 4-part, 41-W-shaped plate, 42-recess, 43-cover plate. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0041] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0043] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Example 1, as Figure 1-9 As shown, a jig for irregularly shaped parts includes a jaw holder 1 and an adjusting bolt 2. The jaw holder 1 includes a central shaft 11, with a circular boss 12 at one end and a circular boss 13 at the other end. A stud 14 is fixed to the center of the outer side of the circular boss 1, and a fastening nut 15 is fitted onto the stud 14. Several jaws 16 are radially connected to the circumference of the central shaft 11. All jaws 16 have threaded holes near their tops, parallel to the axis of the central shaft 11. The adjusting bolt 2 is screwed into the threaded holes. The jaws 16 are fixedly or detachably connected to the central shaft 11. The jaws 16 are cylindrical or prismatic in shape. Specifically, in this embodiment... Figure 4 As shown, the chuck 16 is connected to the central shaft 11 by welding, and the chuck 16 is cylindrical in shape.

[0045] In this embodiment, there are 8 evenly distributed chucks 16. No chucks 16 are set near the φ4.5 through hole. The reason is that after actual operation, it was found that the strength of part 4 is sufficient. That is, when other holes are supported, the φ4.5 hole does not need to be supported and will not deform after drilling.

[0046] It also includes an antenna-shaped pressure plate 3, which includes two round rods 31 and a pressure plate 32. The two round rods 31 are fixed at a certain angle on the pressure plate 32. The pressure plate 32 has a light hole in the center for the stud 14 to pass through. The space formed by the two round rods 31 is adapted to the recess 42 on the part 4. The pressure plate 32 is circular in shape and its diameter is not less than the diameter of the center hole of the part 4.

[0047] The adjusting bolt 2 is also equipped with a lock nut 21, which can be screwed onto either side of the chuck 16. In this embodiment, the lock nut 21 is located between the chuck 16 and the head of the adjusting bolt 2 to prevent the part 4 from being too thick and the portion of the adjusting bolt 2 protruding from the chuck 16 from being insufficient to screw the lock nut 21.

[0048] Example 2: A method for using a tooling fixture for irregularly shaped parts. In this example, the connection between the jaw 16 and the central shaft 11 is welding. The jaw 16 is cylindrical in shape. The specific usage steps are as follows: Step 1: Clamp the part to be processed 4 onto the jaw holder 1 using the fastening nut 15. The specific method for clamping the part to be processed 4 onto the jaw holder 1 is as follows: sequentially, fit the part to be processed 4 and the antenna-shaped pressure plate 3 onto the stud 14, and then tighten the fastening nut 15. Each part to be processed 4 should be positioned close to the nearest jaw 16, while the center hole of the part to be processed 4 is secured to the circular boss 12.

[0049] Step 2: Clamp the circular boss 13 at the other end of the jaw holder 1 onto the three-jaw chuck of the machine tool.

[0050] Step 3: Rotate the adjusting bolt 2 to adjust the distance between the head of the adjusting bolt 2 and the workpiece 4 to be processed, so that the end face of the workpiece 4 supported by the adjusting bolt 2 is kept in the same vertical plane. Use a dial indicator to confirm that the end face of the workpiece 4 is in the same vertical plane. The specific operation is as follows: when the pointer of the dial indicator swings after rotating one full turn on the end face of the workpiece 4, it means that the end face of the workpiece 4 is not aligned. At this time, adjust the corresponding adjusting bolt 2. When the pointer does not swing after rotating one full turn on the end face of the workpiece 4, it means that the end face of the workpiece 4 is in the same vertical plane.

[0051] Step four: Begin the processes following part 4.

[0052] Compared with the prior art, the present invention has the following advantages: (1) Using the principle of the micrometer screw gauge, that is, when the screw rotates in the nut for one revolution, the screw moves along the rotation axis by one pitch linear relationship. The workpiece 4 to be processed is clamped onto the jaw seat 1 with the fastening nut 15. After the jaw seat 1 is fastened to the three-jaw chuck of the machine tool, the height of the screw is slightly adjusted by rotating the eight adjusting bolts 2 to support the end face of the workpiece 4 to be processed to keep it at the same height, so as to achieve the purpose of accurately aligning the outer circle and end face.

[0053] (2) Using the double nut anti-loosening principle, after the part to be processed 4 is adjusted, tighten the 8 anti-loosening nuts 21, which generate axial force with the 8 jaws 16 with threaded holes, thereby increasing the friction between the nuts and the teeth of the adjusting bolt 2 and preventing the nuts from loosening automatically, thus playing an effective anti-loosening role and keeping the part 4 in the adjusted state under processing vibration conditions.

[0054] (3) The irregular part 4 to be processed has an odd shape and is extremely thin. The present invention uses multiple small circular contact parts 4 to replace the overall surface contact, which can effectively avoid interference between the fixture and the part 4, and is easy to process. It has the characteristics of being lightweight, material-saving and easy to manufacture.

[0055] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A tooling fixture for irregularly shaped parts, characterized in that: Includes a claw seat (1) and an adjusting bolt (2). The claw seat (1) includes a central shaft (11). One end of the central shaft (11) is provided with a circular boss (12), and the other end is provided with a circular boss (13). A stud (14) is fixed at the outer center of the circular boss (12). The stud (14) is equipped with a fastening nut (15). Several claws (16) are connected radially on the circumferential surface of the central shaft (11). All claws (16) are provided with threaded holes near the top parallel to the axis of the central shaft (11). The adjusting bolt (2) is screwed into the threaded holes. It also includes an antenna-shaped pressure plate (3), which includes two round rods (31) and a pressure plate (32). The two round rods (31) are fixed at a certain angle on the pressure plate (32). The pressure plate (32) has a light hole in the center for the stud (14) to pass through, and the space formed by the two round rods (31) is fitted with a recess (42) on the component (4).

2. The tooling fixture for irregularly shaped parts according to claim 1, characterized in that: The pressure plate (32) is circular in shape and its diameter is not less than the diameter of the center hole of the part (4).

3. The tooling fixture for irregularly shaped parts according to claim 1, characterized in that: The adjusting bolt (2) is also equipped with a lock nut (21).

4. The tooling fixture for irregularly shaped parts according to claim 1, characterized in that: The contact area between the claw (16) and the anti-loosening nut (21) is set as a plane.

5. A tooling fixture for irregularly shaped parts according to claim 1, characterized in that: The connection between the claw (16) and the central shaft (11) can be a fixed connection or a detachable connection.

6. A tooling fixture for irregularly shaped parts according to any one of claims 1-5, characterized in that: The claw (16) is cylindrical or prismatic in shape.

7. A method for using a tooling fixture for irregularly shaped parts, characterized in that: This is achieved using a tooling fixture for irregularly shaped parts as described in claims 1, 4, or 5. The specific steps are as follows. Step 1: Clamp the part to be processed (4) onto the claw seat (1) with a fastening nut (15). Place each hole to be processed on the part to be processed (4) close to the nearby chuck (16), and at the same time, the center hole of the part to be processed (4) is clamped on the circular boss (12). Step 2: Clamp the circular boss 2 (13) at the other end of the jaw holder (1) onto the three-jaw chuck of the machine tool; Step 3: Rotate the adjusting bolt (2) to adjust the distance between the head of the adjusting bolt (2) and the workpiece (4) to be processed, so that the end face of the workpiece (4) supported by the adjusting bolt (2) is kept on the same vertical plane; Step 4: Begin the subsequent processes for the part to be processed (4).

8. The method of using a tooling fixture for irregularly shaped parts according to claim 7, characterized in that: The adjusting bolt (2) is also equipped with a locking nut (21). In step three, after adjusting the workpiece (4), the locking nut (21) is tightened.

9. The method of using a tooling fixture for irregularly shaped parts according to claim 7, characterized in that: In step three, the dial indicator is used to determine that the end face of the part to be processed (4) is on the same vertical plane. The specific operation is as follows: when the dial indicator needle swings after rotating one revolution around the end face of the part to be processed (4), it means that the end face of the part to be processed (4) is not aligned. At this time, adjust the corresponding adjustment bolt (2). When the dial indicator needle does not swing after rotating one revolution around the end face of the part to be processed (4), it means that the end face of the part to be processed (4) is kept on the same vertical plane.

10. The method of using a tooling fixture for irregularly shaped parts according to claim 7, characterized in that: The pressure plate (32) is circular in shape and its diameter is not less than the diameter of the center hole of the part (4). In step one, the specific method for clamping the part (4) to be processed to the claw seat (1) is to sequentially put the part (4) to be processed and the antenna-shaped pressure plate (3) into the stud (14), and then tighten the fastening nut (15). At this time, the two round rods of the antenna-shaped pressure plate (3) just fit into the recess (42).

11. A method of using a tooling fixture for irregularly shaped parts according to any one of claims 7-10, characterized in that: The claw (16) is cylindrical or prismatic in shape.

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