Tool clamp for finish turning of thin-wall outer circle

Abstract

The utility model discloses a work fixture for finish turning of a thin-wall outer circle, which comprises a work piece, a work piece fixing seat and a work piece positioning tool, the work piece fixing seat is connected with a main shaft, the work piece is installed on the outer circle of the work piece fixing seat in a matched mode through an inner hole, a positioning groove is arranged on the work piece fixing seat, and the work piece positioning tool comprises a positioning ball and a C-shaped pressing plate. The positioning balls are installed in the positioning grooves and used for conducting radial positioning on the workpiece, and the C-shaped pressing plate is arranged to be in contact with the workpiece fixing base and the axial end face of the workpiece and used for conducting axial positioning on the workpiece. By means of the mode, the tool clamp for finish turning of the thin-wall outer circle is simple in structure, convenient to clamp, capable of accurately positioning the radial direction and the axial direction of a workpiece, preventing deviation deformation, guaranteeing machining quality, high in universality and suitable for machining of outer circles of various thin-wall parts, and machining efficiency and flexibility are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of parts processing tooling, in particular to a tooling fixture for precision turning a thin-walled outer circle. Background Art

[0002] In the process of machining thin-walled external cylindrical parts, the conventional method is to use a three-jaw or four-jaw chuck to achieve precise positioning according to the inner hole of the workpiece, and then perform external cylindrical turning.

[0003] However, the problem is that these workpieces, due to their thin walls, are susceptible to deformation when the chuck jaws expand to securely grip the workpiece. This deformation effect is particularly pronounced during the finishing phase, making it difficult to achieve the required roundness accuracy of the workpiece's outer diameter. This not only affects overall product quality but can also delay production schedules. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a tooling fixture for precision turning thin-walled external circles. It has a simple structure, is easy to clamp, accurately positions the workpiece in the radial and axial directions, prevents offset deformation, ensures processing quality, has strong versatility, is suitable for external circle processing of various thin-walled parts, and improves processing efficiency and flexibility.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a fixture for fine turning thin-walled outer circles, comprising: a workpiece, a workpiece fixing seat and a workpiece positioning fixture.

[0006] The workpiece fixing seat is configured to be connected to the main shaft, and the workpiece is mounted on the outer circle of the workpiece fixing seat through the inner hole. The workpiece fixing seat is provided with a positioning groove.

[0007] The workpiece positioning fixture includes a positioning bead and a C-shaped pressure plate. The positioning bead is installed in the positioning groove for radial positioning of the workpiece. The C-shaped pressure plate is configured to contact the workpiece fixing seat and the axial end face of the workpiece for axial positioning of the workpiece.

[0008] In a preferred embodiment of the present invention, the workpiece fixing seat is fixedly connected to the main shaft through a plurality of hexagon socket screws.

[0009] In a preferred embodiment of the present invention, a predetermined gap is left between the inner hole of the workpiece and the outer circle of the workpiece fixing seat, and the gap is set between 0.05mm and 0.12mm.

[0010] In a preferred embodiment of the present invention, a gap of 0.1 mm is maintained between the inner hole of the workpiece and the outer circle of the workpiece fixing seat.

[0011] In a preferred embodiment of the present invention, at least three positioning grooves are provided and are evenly distributed in a circumferential direction along the workpiece fixing seat.

[0012] In a preferred embodiment of the present invention, the positioning bead has an external thread structure, and the external thread structure matches the positioning groove to achieve locking of the positioning bead in the positioning groove.

[0013] In a preferred embodiment of the present invention, the ball end of the positioning bead is arranged to contact and position with the radial surface of the workpiece, and the flat end of the positioning bead is also pre-tightened by a screw to prevent loosening.

[0014] In a preferred embodiment of the present invention, the center of the C-shaped pressure plate is connected to a second hexagon socket screw, which passes through the C-shaped pressure plate and is connected to the workpiece fixing seat so that the C-shaped pressure plate presses the axial end face of the workpiece.

[0015] The beneficial effects of the utility model are: simple structure, easy clamping, three positioning beads are evenly distributed in the 360° direction, three points form a circle, and then the end face is pressed by the C-shaped pressing plate to meet the precise radial and axial positioning of the workpiece, which can solve the external cylindrical processing of many thin-walled parts of the same type with different specifications, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 This is a structural diagram of a preferred embodiment of a workpiece of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of a preferred embodiment of a fixture for fine turning thin-walled outer circles according to the present invention;

[0019] Figure 3 This is a structural schematic diagram of a preferred embodiment of the present invention when the workpiece is not installed in the workpiece fixing seat;

[0020] Figure 4 This is a structural schematic diagram of a preferred embodiment of the present invention when a workpiece is loaded into a workpiece fixing seat;

[0021] Figure 5 It is a cross-sectional view of a preferred embodiment of the present invention when a workpiece is loaded into a workpiece fixing seat;

[0022] Figure 6 yes Figure 5 AA view;

[0023] The markings of the components in the accompanying drawings are as follows:

[0024] 1. Workpiece, 11. Inner hole, 2. Workpiece fixing seat, 21. Locating groove, 22. Outer circle, 3. Locating bead, 31. Ball end, 32. Flat end, 33. External thread structure, 4. Spindle, 5. Hexagon socket screw 1, 6. Screw, 7. C-type pressure plate, 8. Hexagon socket screw 2. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] The utility model relates to a preferred embodiment of a tool fixture for fine turning a thin-walled outer circle.

[0028] See also Figure 1-6 The fixture for fine turning thin-walled outer circles includes a workpiece 1, a workpiece fixing seat 2 and a workpiece positioning fixture.

[0029] Preferably, the workpiece 1 fixing seat is configured to be connected to the spindle 4, and power is transmitted through the spindle 4 to drive the workpiece for processing. Preferably, the workpiece fixing seat 2 is fixedly connected to the spindle 4 by a plurality of hexagon socket screws 5.

[0030] Secondly, the workpiece 1 is mounted on the outer circle 22 of the workpiece fixing seat 2 through the inner hole 11 to achieve relative fixation between the workpiece 1 and the workpiece fixing seat 2. The workpiece positioning fixture is configured to be able to radially and axially position the workpiece 1.

[0031] Furthermore, a predetermined gap is left between the inner hole 11 of the workpiece 1 and the outer circle 22 of the workpiece fixing seat 2, and the gap is set between 0.05mm-0.12mm. This can ensure the stability of the workpiece during processing and avoid wear of the workpiece due to overly tight fit.

[0032] Preferably, a gap of 0.1 mm is maintained between the inner hole 11 of the workpiece 1 and the outer circle 22 of the workpiece fixing seat 2 .

[0033] In a preferred embodiment, the workpiece positioning fixture includes positioning beads 3 and a C-shaped pressure plate 7 , wherein the positioning beads 3 are used to radially position the workpiece 1 , and the C-shaped pressure plate 7 is used to axially position the workpiece 1 .

[0034] In the present invention, at least three positioning grooves 21 are provided on the workpiece fixing seat 2 . The three positioning grooves 21 are evenly distributed in a circumferential direction along the workpiece fixing seat. The positioning beads 3 are installed in the positioning grooves 21 .

[0035] The positioning bead 3 has an external thread structure 33, which matches the positioning groove 21 to achieve locking of the positioning bead in the positioning groove 21: the ball end 31 of the positioning bead 3 is set to contact and position with the radial surface of the workpiece 1. In order to prevent the positioning bead 3 from loosening during the processing, the flat end 32 of the positioning bead 3 is also loosened and pre-tightened by the screw 6.

[0036] The C-shaped pressure plate 7 is configured to contact the axial end surface of the workpiece fixing seat 2 and the workpiece 1: wherein the center of the C-shaped pressure plate 7 is connected to a second hexagon socket screw 8, which passes through the C-shaped pressure plate 7 and is connected to the workpiece fixing seat 2 so that the C-shaped pressure plate 7 presses the axial end surface of the workpiece.

[0037] The fixture of the present invention has a simple structure and is easy to clamp. Three positioning beads 3 are evenly distributed in the 360° direction, and the three points form a circle. First, the workpiece 1 is mounted on the workpiece fixing seat 2, and the positioning beads 3 are adjusted with an inner hexagonal wrench through the outer thread of the positioning beads. After the workpiece runout is corrected, the C-shaped pressure plate 7 is inserted, and the end face of the C-shaped pressure plate 7 is pre-tightened by the inner hexagonal screw. This tooling can solve the processing of many similar thin-walled parts of different specifications, which is very convenient.

[0038] The clamping process of the fixture for fine turning thin-walled outer circles of the utility model is:

[0039] 1. Lathe tooling:

[0040] Install the workpiece holder 2 on the spindle 4 using the hexagon socket screw 5, adjust the radial runout to ensure stability and accuracy during machining, and then lathe the outer circle of the workpiece holder 2 that matches the workpiece to ensure that there is a 0.1mm gap between the outer circle of the holder and the inner hole of the workpiece. This gap ensures that the workpiece is stable during machining and avoids wear or deformation of the workpiece due to over-tight fit.

[0041] 2. Install the positioning beads, adjust the outer circle runout of the workpiece, and pre-tighten the flat end screws to prevent loosening:

[0042] Insert the workpiece 1, and then install the three positioning beads 3 into the positioning groove 21. The ball end 31 of the positioning beads 3 contacts the radial surface of the workpiece, and the positioning beads 3 are adjusted with a wrench to calibrate the outer circle runout of the workpiece 1. Then, the anti-loosening flat end is pre-tightened with the screw 6 to enhance its stability. This process is only required for the first piece. For subsequent processing, you only need to directly place the workpiece;

[0043] 3. Insert the C-type pressure plate and pre-tighten the hexagon socket:

[0044] First, screw the hexagon socket screw 8 into the workpiece fixing seat 2, then insert the C-shaped pressure plate 7 from the top, and continue to tighten the hexagon socket screw 8 to axially position the workpiece 1. Subsequently, you only need to loosen the hexagon socket screw 8, pull out the C-shaped pressure plate 7, and then take out the workpiece 1.

[0045] The beneficial effects of the fixture for fine turning thin-walled outer circles of the utility model are:

[0046] The simple structure and convenient clamping can ensure the precise radial and axial positioning of the workpiece, effectively avoiding the deviation and deformation of the workpiece during the processing, and ensuring the processing quality;

[0047] It has strong versatility and can be applied to the external cylindrical processing of thin-walled parts of various specifications, greatly improving processing efficiency and flexibility.

[0048] Precise positioning and stable clamping methods effectively avoid the deviation and deformation of the workpiece during processing, ensuring the processing quality.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fixture for fine turning thin-walled outer circles, characterized in that: include: Workpiece, workpiece holder and workpiece positioning fixture, The workpiece fixing seat is configured to be connected to the main shaft, and the workpiece is mounted on the outer circle of the workpiece fixing seat through the inner hole. The workpiece fixing seat is provided with a positioning groove. The workpiece positioning fixture includes a positioning bead and a C-shaped pressure plate. The positioning bead is installed in the positioning groove for radial positioning of the workpiece. The C-shaped pressure plate is configured to contact the workpiece fixing seat and the axial end face of the workpiece for axial positioning of the workpiece.

2. The fixture for fine turning thin-walled outer circles according to claim 1, characterized in that: The workpiece fixing seat is fixedly connected to the main shaft through a plurality of hexagon socket screws.

3. The fixture for fine turning thin-walled outer circles according to claim 1, characterized in that: A predetermined gap is left between the inner hole of the workpiece and the outer circle of the workpiece fixing seat, and the gap is set between 0.05mm and 0.12mm.

4. The fixture for fine turning thin-walled outer circles according to claim 3, characterized in that: A gap of 0.1 mm is maintained between the inner hole of the workpiece and the outer circle of the workpiece fixing seat.

5. The fixture for fine turning thin-walled outer circles according to claim 1, characterized in that: There are at least three positioning grooves, which are evenly distributed in a circumferential direction along the workpiece fixing seat.

6. The fixture for fine turning thin-walled outer circles according to claim 1, characterized in that: The positioning bead has an external thread structure, and the external thread structure matches the positioning groove to achieve locking of the positioning bead in the positioning groove.

7. The fixture for fine turning thin-walled outer circles according to claim 6, characterized in that: The ball end of the positioning bead is arranged to contact and position with the radial surface of the workpiece, and the flat end of the positioning bead is also pre-tightened by a screw to prevent loosening.

8. The fixture for fine turning thin-walled outer circles according to claim 1, characterized in that: The center of the C-shaped pressing plate is connected to a second hexagon socket screw, which passes through the C-shaped pressing plate and is connected to the workpiece fixing seat so that the C-shaped pressing plate presses the axial end face of the workpiece.

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