Lathe fixture

Abstract

The application discloses a lathe clamp, which comprises a chuck mechanism, a flange plate, a first positioning assembly, a first clamping assembly, a second positioning assembly and a second clamping assembly. The first clamping assembly and the first positioning assembly are oppositely arranged, so that the blank can be clamped and positioned in the second radial direction; similarly, the second clamping assembly and the second positioning assembly are oppositely arranged, so that the blank can be clamped and positioned in the first radial direction; in this way, the blank is accurately positioned and reliably connected to the flange plate, the central axis of the cylindrical part coincides with the central axis of the lathe main shaft, the first annular groove and the second annular groove can be machined by a turning tool, and the blind hole can be machined by a drill bit. When the blank is installed and replaced, only the first clamping assembly and the second clamping assembly need to be operated to accurately position and clamp the blank, so that the clamping efficiency of the blank is improved, and the machining size consistency of the part is ensured.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, and in particular to a lathe fixture. Background Technology

[0002] refer to Figure 1 , Figure 1 It is a blank used for machining irregularly shaped parts; Reference Figure 2 , Figure 2 Is adopted Figure 1 The part is a non-circular shape with both hexahedral and cylindrical structures, machined from a blank. The non-circular shape includes a cuboid portion 110, and a cylindrical portion 120 on one rectangular end face of the cuboid portion 110, with the cylindrical portion 120 not located at the geometric center of this end face. The cylindrical portion 120 has a first annular groove 121, and the rectangular end face has a second annular groove 111 surrounding the cylindrical portion. The end face of the cylindrical portion 120 has a blind hole 122. The blank of the non-circular shape has already been machined with the cuboid portion 110 and the cylindrical portion 120 located on one rectangular end face of the cuboid portion, and the central axis of the cylindrical portion 120 does not pass through the center point of the rectangular end face. The outer surface of the cylindrical portion 120 needs to be machined with the first annular groove 121, the side surface of the cuboid portion connecting to the cylindrical portion needs to be machined with the second annular groove 111 whose central axis coincides with the central axis of the cylindrical portion, and the center of the end face of the cylindrical portion needs to be machined with a blind hole 122.

[0003] In related technologies, a common machining method involves using a conventional lathe or CNC lathe with a manually clamped lathe fixture for turning. The specific machining method is as follows: 1. Design and manufacture a special manually clamped eccentric lathe fixture. Use this fixture to manually clamp the workpiece, ensuring that the rotation center of the cylinder to be machined is concentric with the rotation center of the lathe spindle. 2. Use external turning tools and grooving tools to turn the outer cylindrical surface. 3. Use drill bits and internal boring tools to drill and bore the inner cylindrical surface. The disadvantages of this machining method are: manual workpiece clamping increases the labor intensity of workers and results in low clamping efficiency; low clamping and positioning accuracy leads to poor product dimensional consistency. Summary of the Invention

[0004] This application provides a lathe fixture that can solve the technical problems of low clamping efficiency and poor product dimensional consistency when machining irregularly shaped parts with both hexahedral and cylindrical structures. The technical solution is as follows:

[0005] A lathe fixture for clamping a blank, the blank comprising a cuboid part and a cylindrical part at one rectangular end face of the cuboid part, the central axis of the cylindrical part not passing through the center point of the rectangular end face, the outer side face of the cylindrical part requiring machining of a first annular groove, the side face of the cuboid part connecting the cylindrical part requiring machining of a second annular groove with the central axis coinciding with the central axis of the cylindrical part, and the center of the end face of the cylindrical part requiring machining of a blind hole, the lathe fixture comprising: a chuck mechanism comprising a cylindrical chuck body connected to the main shaft of a lathe, one side of the chuck body being provided with a first moving block and a second moving block movable along a first radial direction of the chuck body, and the first moving block and the second moving block being respectively located on both sides of the central axis of the chuck body; a flange plate, one side of which being connected to the chuck body, and the other side being provided with a first positioning assembly and a first clamping assembly arranged along a second radial direction of the chuck body, a second positioning assembly and a second clamping assembly arranged along the first radial direction of the chuck body; wherein the first radial direction and the second radial direction are perpendicular to each other; the first clamping assembly is connected to the first moving block, and the second clamping assembly is connected to the second moving block; the first positioning assembly, the first clamping assembly, the second positioning assembly and the second clamping assembly are distributed on four side faces of the cuboid part, the first positioning assembly and the second positioning assembly are used for positioning the blank, and the first clamping assembly and the second clamping assembly are used for clamping the blank, so that the central axis of the cylindrical part is collinear with the central axis of the main shaft of the lathe.

[0006] Optionally, the first positioning assembly comprises a first positioning seat fixedly connected to the flange plate; the second positioning assembly comprises a second positioning seat fixedly connected to the flange plate and perpendicular to the first positioning seat; the first clamping assembly comprises a first fixed support, a first pressing shaft and a first movable support; the first fixed support is provided with a first through hole extending along the second radial direction, the first pressing shaft is movably arranged in the first through hole, and the first movable support is movably connected to the flange plate and used for driving the first pressing shaft to move linearly along the first through hole; the second clamping assembly comprises a second fixed support, a second pressing shaft and a second movable support, the second fixed support is provided with a second through hole extending along the first radial direction, the second pressing shaft is fixedly connected to the second movable support and passes through the second through hole, and the second movable support is movably connected to the flange plate and used for driving the second pressing shaft to move along the second through hole.

[0007] Optionally, the first moving block is fixedly connected with the first dynamic support, the first dynamic support is connected with a wedge-shaped part perpendicular to the first compression shaft, the wedge-shaped part has a first inclined surface, and the first inclined surface is located on a side of the wedge-shaped part close to the central axis of the flange plate, the first compression shaft is provided with a wedge-shaped through hole for the wedge-shaped part to pass through, and the first inclined surface is parallel to the inclined surface of the wedge-shaped through hole; and the second moving block is fixedly connected with the second dynamic support.

[0008] Optionally, the first clamping assembly further comprises a first compression spring; one end of the first compression shaft away from the blank is provided with a check ring, and the first compression spring is sleeved on the first compression shaft and located between the check ring and the side of the first fixed support away from the blank.

[0009] Optionally, the second clamping assembly further comprises a second compression spring; the second compression spring is sleeved on the second compression shaft and located between the second fixed support and the second dynamic support.

[0010] Optionally, the first compression shaft comprises two sub-compression shafts arranged in the axial direction of the flange plate, and the opposite sides of the two sub-compression shafts are respectively provided with wedge-shaped grooves, the wedge-shaped part passes through the two opposite wedge-shaped grooves, and the first inclined surface is parallel to the inclined surfaces of the wedge-shaped grooves of the two sub-compression shafts.

[0011] Optionally, the number of the second compression shafts is four, and the four second compression shafts are uniformly distributed on the second dynamic support, and each second compression shaft is correspondingly provided with a second compression spring.

[0012] Optionally, the first positioning assembly further comprises a plurality of first positioning plates of different thicknesses, and any first positioning plate is fixedly connected to the side of the first positioning seat facing the blank.

[0013] Optionally, the second positioning assembly further comprises a plurality of second positioning plates of different thicknesses, and any second positioning plate is fixedly connected to the side of the second positioning seat facing the blank.

[0014] Optionally, the center of the flange plate has an air inlet hole, the flange plate is provided with a gas passage in communication with the air inlet hole, the gas passage has a gas connection port, and the gas connection port is used for connecting an external gas source.

[0015] The technical scheme provided by the embodiments has at least the following beneficial effects:

[0016] The lathe clamp comprises a chuck mechanism, a flange plate, a first positioning assembly, a first clamping assembly, a second positioning assembly and a second clamping assembly. The chuck body of the chuck mechanism is connected to the main shaft of the lathe and can output rotary motion. The side surface of the chuck body is connected with the first positioning assembly and the first clamping assembly in the second radial direction, and the chuck body is arranged with the second positioning assembly and the second clamping assembly in the first radial direction. The first positioning assembly and the second positioning assembly are fixedly connected to the flange plate and are used for positioning the adjacent two side surfaces of the cuboid part of the blank, so that the central axis of the cylindrical part is collinear with the central axis of the main shaft of the lathe. The first clamping assembly and the second clamping assembly are used for fixing the blank. Since the first clamping assembly and the first positioning assembly are oppositely arranged, the first clamping assembly applies a clamping force to the blank, and the blank can be clamped and positioned in the second radial direction. Similarly, the second clamping assembly and the second positioning assembly are oppositely arranged, the second clamping assembly applies a clamping force to the blank, and the blank can be clamped and positioned in the first radial direction. In this way, the blank is accurately positioned and reliably connected to the flange plate. When the main shaft of the lathe is started to rotate, the central axis of the cylindrical part is coincident with the central axis of the main shaft of the lathe, and the first annular groove and the second annular groove can be machined by a turning tool, and the blind hole can be machined by a drill bit. Compared with the method in the related art, the first positioning assembly and the second positioning assembly of the lathe clamp are fixedly connected to the flange plate, and the accurate positioning and clamping of the blank can be realized by only operating the first clamping assembly and the second clamping assembly when the blank is installed and replaced, so that the clamping efficiency of the blank is improved, and the machining size consistency of the part is ensured.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is the blank of the special-shaped part to be clamped by the lathe clamp of the present application before machining;

[0020] Figure 2 is the flange plate used in the present application Figure 1 is a perspective view of the special-shaped part machined from the blank;

[0021] Figure 3 is a perspective view of the lathe clamp provided by the embodiment of the present application;

[0022] Figure 4 is a three-dimensional schematic view of a lathe fixture clamping a blank piece provided by an embodiment of the present application;

[0023] Figure 5 is an exploded schematic view of Figure 4

[0024] Figure 6 is a three-dimensional schematic view of a chuck mechanism provided by an embodiment of the present application;

[0025] Figure 7 is a front view of a lathe fixture provided by an embodiment of the present application;

[0026] Figure 8 is a sectional view at A-A in Figure 7

[0027] Figure 9 is a sectional view at B-B in Figure 7

[0028] Figure 10 is a three-dimensional schematic view of a first positioning seat provided by an embodiment of the present application;

[0029] Figure 11 is a three-dimensional schematic view of a first positioning plate provided by an embodiment of the present application;

[0030] Figure 12 is a three-dimensional schematic view of a first positioning support provided by an embodiment of the present application;

[0031] Figure 13 is a three-dimensional schematic view of a first movable support provided by an embodiment of the present application;

[0032] Figure 14 is a three-dimensional schematic view of a wedge provided by an embodiment of the present application;

[0033] Figure 15 is a three-dimensional schematic view of a sub-pressing shaft provided by an embodiment of the present application;

[0034] Figure 16 is a three-dimensional schematic view of a second positioning seat provided by an embodiment of the present application;

[0035] Figure 17 is a three-dimensional schematic view of a second positioning plate provided by an embodiment of the present application;

[0036] Figure 18 is a three-dimensional schematic view of a second positioning support provided by an embodiment of the present application;

[0037] Figure 19 is a three-dimensional schematic view of a first movable support provided by an embodiment of the present application;

[0038] Figure 20 ​​​is a perspective view of a flange plate provided by an embodiment of the present application.

[0039] Reference Signs List

[0040] 100 - blank; 110 - cuboid part; 111 - second annular groove; 120 - cylindrical part; 121 - first annular groove; 122 - blind hole;

[0041] 200 - chuck mechanism; 210 - chuck body; 220 - first moving block; 230 - second moving block;

[0042] 300 - flange plate; 310 - gas inlet hole;

[0043] 400 - first positioning assembly; 410 - first positioning seat; 411 - first bevelled corner; 420 - first positioning plate;

[0044] 500 - first clamping assembly; 510 - first fixed seat; 511 - first through hole; 520 - first pressing shaft; 521 - check ring; 522 - sub-pressing shaft; 523 - wedge-shaped groove; 530 - first movable seat; 540 - first compression spring;

[0045] 600 - second positioning assembly; 610 - second positioning seat; 620 - second positioning plate;

[0046] 700 - second clamping assembly; 710 - second fixed seat; 711 - second bevelled corner; 711 - second through hole; 720 - second pressing shaft; 730 - second movable seat; 740 - second compression spring;

[0047] 800 - wedge-shaped part; 810 - first inclined surface. DETAILED DESCRIPTION

[0048] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0049] In the present disclosure, the orientation words such as "up, down" used herein generally refer to the "up, down" of the corresponding components in the use state in the direction of gravity, and "inner, outer" refer to the "inner, outer" relative to the outline of the corresponding components. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. In the following description, when referring to the drawings, the same reference numerals in different drawings represent the same or similar elements, unless otherwise explained.

[0050] Reference Figure 1 , Figure 1 is a blank for machining a special-shaped part; referenceFigure 2 , Figure 2 Is adopted Figure 1 An irregularly shaped part, machined from a blank, possesses both hexahedral and cylindrical structures. The part includes a cuboid portion 110, with a cylindrical portion 120 located at a rectangular end face of the cuboid portion 110, but not at the geometric center of that end face. The cylindrical portion 120 has a first annular groove 121, and the rectangular end face has a second annular groove 111 surrounding the cylindrical portion 120. The end face of the cylindrical portion 120 also has a blind hole 122.

[0051] refer to Figure 2 The blank 100 of the irregular part has been machined into a cuboid portion 110 and a cylindrical portion 120 located on a rectangular end face of the cuboid portion, and the central axis of the cylindrical portion 120 does not pass through the center point of the rectangular end face. A first annular groove 121 needs to be machined on the outer surface of the cylindrical portion 120, and a second annular groove 111 whose central axis coincides with the central axis of the cylindrical portion needs to be machined on the side surface of the cuboid portion 110 connecting the cylindrical portion. A blind hole 122 needs to be machined at the center of the end face of the cylindrical portion 120.

[0052] In related technologies, the commonly used machining method is to use a conventional lathe or CNC lathe in conjunction with a manually clamped lathe fixture for turning. The specific machining method is as follows:

[0053] 1. Design and manufacture a special manual clamping eccentric lathe fixture. Use the special fixture to manually clamp the workpiece to ensure that the rotation center of the cylinder to be machined is concentric with the rotation center of the lathe spindle.

[0054] 2. Use external turning tools and grooving tools to turn the external cylindrical surface.

[0055] 3. Use drill bits and internal boring tools to drill and bore the inner cylindrical surface.

[0056] The disadvantages of this processing method are: manual clamping of workpieces increases the labor intensity of workers and has low clamping efficiency; the human-machine cooperative operation mode cannot adapt to the processing needs of digital automated production lines; and it cannot meet the needs of six-degree-of-freedom industrial ground rail robots or gantry robots for automatic loading and unloading.

[0057] This application provides a lathe fixture, as shown in the following embodiments. Figures 3 to 20 The lathe fixture is used to clamp the blank 100 so that the central axis of the cylindrical part 120 is collinear with the rotation center axis of the lathe spindle, which facilitates the lathe machining of the first annular groove 121, the second annular groove 111 and the blind hole 122. The lathe fixture includes: a chuck mechanism 200, a flange 300, a first positioning component 400, a first clamping component 500, a second positioning component 600 and a second clamping component 700.

[0058] refer to Figures 3 to 6, the chuck mechanism 200 includes a cylindrical chuck body 210, one side of the chuck body 210 is provided with a first moving block 220 and a second moving block 230 which can move along the first radial direction of the chuck body 210, and the first moving block 220 and the second moving block 230 are respectively located on both sides of the central axis of the chuck body 210; wherein the first moving block 220 and the second moving block 230 can move independently and have respective driving parts.

[0059] Reference Figures 3 to 5 , one side of the flange plate 300 is connected with the chuck body 210, and the other side is provided with a first positioning assembly 400 and a first clamping assembly 500 arranged along the second radial direction of the chuck body 210, a second positioning assembly 600 and a second clamping assembly 700 arranged along the first radial direction of the chuck body 210; wherein the first radial direction and the second radial direction are perpendicular to each other. The first clamping assembly 500 is connected with the first moving block 220, and the second clamping assembly 700 is connected with the second moving block 230. The first positioning assembly 400, the first clamping assembly 500, the second positioning assembly 600 and the second clamping assembly 700 are distributed on the four side faces of the cuboid part 110, the first positioning assembly 400 and the second positioning assembly 600 are used for positioning the blank 100, and the first clamping assembly 500 and the second clamping assembly 700 are used for clamping the blank 100, so that the central axis of the cylindrical part 120 is collinear with the central axis of the main shaft of the lathe.

[0060] In the above embodiment, the chuck body 210 of the chuck mechanism 200 is connected to the main shaft of the lathe and can output rotary motion. The side face of the chuck body 210 is connected with the first positioning assembly 400 and the first clamping assembly 500 in the second radial direction, and the first radial direction of the chuck body 210 is provided with the second positioning assembly 600 and the second clamping assembly 700.

[0061] The first positioning assembly 400 and the second positioning assembly 600 are fixedly connected to the flange plate 300 and are used for positioning the adjacent two side faces of the cuboid part 110 of the blank 100, so that when the first positioning assembly 400 and the second positioning assembly 600 are manufactured, the first positioning assembly 400 and the second positioning assembly 600 need to be accurately calculated, so that the blank 100 is close to the first positioning assembly 400 and the second positioning assembly 600, and the central axis of the cylindrical part 120 is collinear with the central axis of the main shaft of the lathe. The first clamping assembly 500 and the second clamping assembly 700 are used for fixing the blank 100.

[0062] Since the first clamping assembly 500 and the first positioning assembly 400 are arranged opposite to each other, the first clamping assembly 500 applies a clamping force to the blank 100, which can clamp and position the blank 100 in the second radial direction. Similarly, the second clamping assembly 700 and the second positioning assembly 600 are arranged opposite to each other, and the second clamping assembly 700 applies a clamping force to the blank 100, which clamps and positions the blank 100 in the first radial direction. In this way, the blank 100 is accurately positioned and reliably connected to the flange 300. When the lathe spindle is started to rotate, the central axis of the cylindrical part 120 coincides with the central axis of the lathe spindle. The first annular groove 121 and the second annular groove 111 can be machined with a cutting tool, and the blind hole 122 can be machined with a drill bit. Compared to conventional methods in related technologies that require positioning the blank 100 on four sides separately and whose positioning references are inconsistent each time, the first positioning component 400 and the second positioning component 600 of the lathe fixture in this application are relatively fixed and have been fixed on the flange 300. The installation and replacement of the blank 100 only requires operation of the first clamping component 500 and the second clamping component 700 to achieve accurate positioning and clamping of the blank 100, thereby improving the clamping efficiency of the blank 100 and ensuring the consistency of the machining dimensions of the parts.

[0063] In this embodiment, the chuck mechanism 200 can be manufactured by itself or modified from an existing two-jaw chuck. For example, the two jaws of the two-jaw chuck can be disassembled, leaving only the chuck body 210 and the first moving block 220 and the second moving block 230 for driving the two jaws to move. The two-jaw chuck has its own drive mechanism for driving the first moving block 220 and the second moving block 230 to move, and the first moving block 220 and the second moving block 230 can move independently.

[0064] According to the embodiments of this application, refer to Figure 4 , Figure 5 and Figure 10 As shown, the first positioning component 400 includes a first positioning seat 410, which is fixedly connected to the flange 300.

[0065] refer to Figure 4 , Figure 5 and Figure 16 As shown, the second positioning component 600 includes a second positioning seat 610, which is fixedly connected to the flange 300 and is perpendicular to the first positioning seat 410.

[0066] refer to Figure 4 , Figure 5 , Figure 12 and Figure 15As shown in the drawings, the first clamping assembly 500 comprises a first fixed support 510, a first pressing shaft 520 and a first movable support 530. The first fixed support 510 is provided with a first through hole 511 extending along the second radial direction. The first pressing shaft 520 is movably arranged in the first through hole 511. The first movable support 530 is movably connected to the flange plate 300 and is used to drive the first pressing shaft 520 to move linearly along the first through hole 511. In this way, the movement of the first movable support 530 in the second radial direction of the chuck body 210 can drive the first pressing shaft 520 to move towards the first positioning seat 410, so that the first positioning assembly 400 and the first clamping assembly 500 can clamp and position the blank 100.

[0067] Similarly, as shown in the drawings, Figure 4 、 Figure 5 、 Figure 18 and Figure 19 , the second clamping assembly 700 comprises a second fixed support 710, a second pressing shaft 720 and a second movable support 730. The second fixed support 710 is provided with a second through hole 711 extending along the first radial direction. The second pressing shaft 720 is fixedly connected to the second movable support 730 and passes through the second through hole 711. The second movable support 730 is movably connected to the flange plate 300 and is used to drive the second pressing shaft 720 to move along the second through hole 711. In this way, the movement of the second movable support 730 in the first radial direction of the chuck body 210 can drive the second pressing shaft 720 to move towards the second positioning seat 610, so that the second positioning assembly 600 and the second clamping assembly 700 can clamp and position the blank 100.

[0068] According to an embodiment of the present application, as shown in the drawings, Figure 5 、 Figure 7 and Figure 8 , the first movable block 220 is fixedly connected to the first movable support 530. The first movable support 530 is connected to a wedge-shaped part 800 perpendicular to the first pressing shaft 520. The wedge-shaped part 800 has a first inclined surface 810 located on the side of the wedge-shaped part 800 close to the central axis of the flange plate 300. The first pressing shaft 520 is provided with a wedge-shaped through hole for the wedge-shaped part 800 to pass through. The first inclined surface 810 is parallel to the inclined surface of the wedge-shaped through hole. When the first movable block 220 moves towards the direction close to the central axis of the chuck, the first movable support 530 drives the wedge-shaped part 800 to move. The wedge-shaped part 800 extrudes the wedge-shaped through hole of the first pressing shaft 520, forcing the first pressing shaft 520 to move along the first through hole 511 of the first fixed support 510 and abutting against the blank 100.

[0069] Similarly, the second moving block 230 is fixedly connected with the second dynamic support 730. When the second moving block 230 moves towards the direction close to the central axis of the chuck body 210, the second dynamic support 730 moves to drive the second pressing shaft 720 to abut against the blank 100.

[0070] According to an embodiment of the present application, as shown in Figure 5 、 Figure 8 and Figure 9 , the first clamping assembly 500 further comprises a first compression spring 540; one end of the first pressing shaft 520 away from the blank 100 is provided with a check ring 521, and the first compression spring 540 is sleeved on the first pressing shaft 520 and is located between the check ring 521 and the side of the first fixed support 510 away from the blank 100. In this way, under the action of the first compression spring 540, the first pressing shaft 520 always has a pre-tightening force away from the blank 100. When the first moving block 220 moves away from the central axis of the chuck body 210, the wedge-shaped part 800 gradually exits from the wedge-shaped hole of the first dynamic support 530, and the first pressing shaft 520 automatically moves away from the blank 100 under the action of the first compression spring 540, so as to loosen the blank 100 in the second radial direction of the chuck body 210.

[0071] Similarly, as shown in Figure 5 , the second clamping assembly 700 further comprises a second compression spring 740; the second compression spring 740 is sleeved on the second pressing shaft 720 and is located between the second fixed support 710 and the second dynamic support 730. In this way, when the second moving block 230 moves away from the central axis of the chuck body 210, the second pressing shaft 720 automatically moves away from the blank 100 under the action of the second compression spring 740, so as to loosen the blank 100 in the first radial direction of the chuck body 210.

[0072] According to an embodiment of the present application, as shown in Figure 8 and Figure 9 , the first pressing shaft 520 comprises two sub-pressing shafts 522 arranged axially along the flange plate 300, and the opposite sides of the two sub-pressing shafts 522 are respectively provided with wedge-shaped grooves 523, the wedge-shaped part 800 passes through the two opposite wedge-shaped grooves 523, and the first inclined surface 810 is parallel to the inclined surfaces of the wedge-shaped grooves 523 of the two sub-pressing shafts 522. In this embodiment, the two sub-pressing shafts 522 are arranged perpendicular to the movement direction of the wedge-shaped part 800, that is, the wedge-shaped part 800 is located between the two sub-pressing shafts 522, and the movement of the wedge-shaped part 800 can simultaneously drive the movement of the two sub-pressing shafts 522, so that the blank 100 is more uniformly stressed in the second radial direction of the chuck body 210.

[0073] According to an embodiment of the present application, referring to Figure 5 As shown in the figure, in order to make the blank 100 bear force more evenly in the first radial direction of the chuck body 210, the number of the second pressing shafts 720 is four, and the four second pressing shafts 720 are evenly distributed on the second dynamic support 730, and each second pressing shaft 720 is correspondingly provided with a second compression spring 740.

[0074] According to an embodiment of the present application, in actual production, the cuboid part 110 of the special-shaped part can have more size specifications, such as different widths or different lengths. In order to make the lathe fixture adapt to more size specifications of the blank 100 to process more size specifications of the special-shaped part, the first positioning assembly 400 further comprises a plurality of first positioning plates 420 of different thickness specifications, and any first positioning plate 420 is fixedly connected to one side of the first positioning seat 410 facing the blank 100. Correspondingly, the second positioning assembly 600 further comprises a plurality of second positioning plates 620 of different thickness specifications, and any second positioning plate 620 is fixedly connected to one side of the second positioning seat 610 facing the blank 100. In this way, when it is necessary to clamp other size of the blank 100, only the corresponding first positioning plate 420 and / or the second positioning plate 620 need to be replaced.

[0075] According to an embodiment of the present application, referring to Figure 20 As shown in the figure, in order to check whether the blank 100 is clamped reliably, the center of the flange plate 300 is provided with an air inlet hole 310, the flange plate 300 is provided with a gas passage in communication with the air inlet hole 310, the gas passage is provided with a gas connection port, and the gas connection port is used to connect an external gas source. Since the bottom of the blank 100 is a flat surface, theoretically, the bottom of the blank 100 will cover the air inlet hole 310 after the blank 100 is clamped. An external gas source with a certain pressure is input into the air inlet hole, and the operator can set the pressure of the external gas source according to experience, and set the pressure of the external gas source input according to experience, and the blank 100 will not be loose, which means that the blank 100 is clamped. Through this method, it can be simply and effectively judged whether the blank 100 is clamped.

[0076] After the lathe fixture is processed, the center of mass of the lathe fixture can not be at the geometric center of the lathe fixture, which can adversely affect the rotation of the lathe. In order to make the center of mass of the lathe fixture be at the geometric center, the lathe fixture can be debugged after the blank 100 is installed on the lathe fixture, so that the center of mass of the lathe fixture after the blank 100 is installed is on the central axis of the lathe spindle.

[0077] For example, referring to Figure 2 and Figure 10As shown, in the embodiment of the present application, the first inclined angle 411 is arranged on the first fixed support 510, and the reference Figure 2 and Figure 19 As shown, and the second inclined angle 711 is arranged on the second movable support 730, which can ensure that the center of mass of the lathe fixture is on the central axis of the lathe spindle in the embodiment of the present application. In other embodiments, the center of mass of the lathe fixture can also be on the central axis of the lathe spindle by arranging inclined angles on other components, and the present application does not limit this.

[0078] The implementation principle of the embodiment of the present application is described below in actual operation steps:

[0079] 1. After removing the two clamping jaws of the two-jaw chuck, the flange plate 300 is installed on the chuck body 210;

[0080] 2. The first positioning seat 410 and the first positioning plate 420 are installed on the flange plate 300, and the second positioning seat 610 and the second positioning plate 620 are installed on the flange plate 300;

[0081] 3. The first fixed support 510 and the second fixed support 710 are connected to the flange plate 300, and the first movable support 530 is connected to the first moving block 220, and the second movable support 730 is connected to the second moving block 230. One end of the wedge-shaped part 800 is inserted into the wedge-shaped groove 523 of the first pressing shaft 520, and the other end is fixedly connected with the first movable support 530;

[0082] 4. The blank 100 is placed between the first positioning plate 420, the second positioning plate 620, the first fixed support 510 and the second fixed support 710;

[0083] 5. Start the driving mechanism of the chuck mechanism 200 to move the first moving block 220 to the central axis of the chuck body 210, drive the first pressing shaft 520 to move to the central axis of the chuck body 210, move the second moving block 230 to the central axis of the chuck body 210, and drive the second pressing shaft 720 to move to the central axis of the chuck body 210, so as to position and clamp the blank 100;

[0084] 6. Start the lathe to rotate the lathe spindle, and sequentially process the first annular groove 121, the second annular groove 111 and the blind hole 122.

[0085] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above embodiments. Within the technical concept range of the present application, the technical solutions of the present application can be subjected to various simple modifications, and these simple modifications all belong to the protection range of the present application.

[0086] It should also be noted that various technical features described in the above detailed description are capable of being combined in any suitable manner unless otherwise explicitly stated. To avoid unnecessary repetition, various possible combinations of features are not all explicitly described in the present disclosure.

[0087] Furthermore, various embodiments of the present disclosure can be combined in any suitable manner, as long as it does not contradict the idea of the present disclosure, and it should be considered as disclosed in the present disclosure.

Claims

1. A lathe fixture for clamping a blank (100), the blank (100) comprising a cuboid portion (110) and a cylindrical portion (120) located at one rectangular end face of the cuboid portion (110), a center axis of the cylindrical portion (120) not passing through a center point of the rectangular end face, a first annular groove (121) needing to be machined along an outer side surface of the cylindrical portion (120), a second annular groove (111) needing to be machined on a side surface of the cuboid portion (110) connected to the cylindrical portion (120), a center axis of the second annular groove (111) coinciding with the center axis of the cylindrical portion (120), and a blind hole (122) needing to be machined at a center of an end face of the cylindrical portion (120), characterized in that, The lathe fixture comprises: A chuck mechanism (200) comprising a cylindrical chuck body (210) connected to a lathe main shaft, one side of the chuck body (210) being provided with a first moving block (220) and a second moving block (230) movable along a first radial direction of the chuck body (210), and the first moving block (220) and the second moving block (230) being located on two sides of a central axis of the chuck body (210) respectively; A flange plate (300) having one side connected to the chuck body (210) and the other side provided with a first positioning assembly (400) and a first clamping assembly (500) arranged along a second radial direction of the chuck body (210), a second positioning assembly (600) and a second clamping assembly (700) arranged along a first radial direction of the chuck body (210); wherein the first radial direction and the second radial direction are perpendicular to each other; the first clamping assembly (500) is connected to the first moving block (220), and the second clamping assembly (700) is connected to the second moving block (230), The first positioning assembly (400), the first clamping assembly (500), the second positioning assembly (600) and the second clamping assembly (700) are distributed on four sides of the cuboid part (110), the first positioning assembly (400) and the second positioning assembly (600) are used for positioning the blank (100), and the first clamping assembly (500) and the second clamping assembly (700) are used for clamping the blank (100), so that the central axis of the cylindrical part (120) is collinear with the central axis of the main shaft of the lathe.

2. The lathe chuck of claim 1, wherein, The first positioning assembly (400) comprises a first positioning seat (410) fixedly connected to the flange plate (300); The second positioning assembly (600) comprises a second positioning seat (610) fixedly connected to the flange plate (300) and perpendicular to the first positioning seat (410); The first clamping assembly (500) comprises a first fixed support (510), a first pressing shaft (520) and a first movable support (530); the first fixed support (510) is provided with a first through hole (511) extending along the second radial direction, the first pressing shaft (520) is movably arranged in the first through hole (511), and the first movable support (530) is movably connected to the flange plate (300) and used for driving the first pressing shaft (520) to move linearly along the first through hole (511); The second clamping assembly (700) comprises a second fixed support (710), a second compression shaft (720) and a second movable support (730), the second fixed support (710) is provided with a second through hole (711) extending along a first radial direction, the second compression shaft (720) is fixedly connected with the second movable support (730) and passes through the second through hole (711), and the second movable support (730) is movably connected to the flange plate (300) and used for driving the second compression shaft (720) to move along the second through hole (711).

3. The lathe chuck of claim 2, wherein, The first movable block (220) is fixedly connected with the first movable support (530), the first movable support (530) is connected with a wedge-shaped part (800) perpendicular to the first compression shaft (520), the wedge-shaped part (800) has a first inclined surface (810), the first inclined surface (810) is located on a side of the wedge-shaped part (800) close to a central axis of the flange plate (300), the first compression shaft (520) is provided with a wedge-shaped through hole for the wedge-shaped part (800) to pass through, and the first inclined surface (810) is parallel to an inclined surface of the wedge-shaped through hole. The second movable block (230) is fixedly connected with the second movable support (730).

4. The lathe chuck of claim 3, wherein, The first clamping assembly (500) further comprises a first compression spring (540), and an end of the first compression shaft (520) away from the blank (100) is provided with a check ring (521), the first compression spring (540) is sleeved on the first compression shaft (520) and located between the check ring (521) and a side of the first fixed support (510) away from the blank (100).

5. The lathe chuck of claim 4, wherein, The second clamping assembly (700) further comprises a second compression spring (740), and the second compression spring (740) is sleeved on the second compression shaft (720) and located between the second fixed support (710) and the second movable support (730).

6. The lathe chuck of claim 5, wherein, The first compression shaft (520) comprises two sub-compression shafts (522) arranged along an axial direction of the flange plate (300), and opposite sides of the two sub-compression shafts (522) are respectively provided with wedge-shaped grooves (523), the wedge-shaped part (800) passes through the two opposite wedge-shaped grooves (523), and the first inclined surface (810) is parallel to inclined surfaces of the wedge-shaped grooves (523) of the two sub-compression shafts (522).

7. The lathe chuck of claim 6, wherein, The number of the second compression shafts (720) is four, and the four second compression shafts (720) are evenly distributed on the second movable support (730), and each second compression shaft (720) is correspondingly provided with a second compression spring (740).

8. The lathe chuck of claim 2, wherein, The first positioning assembly (400) further comprises a plurality of first positioning plates (420) of different thicknesses, and any first positioning plate (420) is fixedly connected to a side of the first positioning seat (410) facing the blank (100).

9. The lathe chuck of claim 2, wherein, The second positioning assembly (600) further comprises a plurality of second positioning plates (620) of different thicknesses, and any one of the second positioning plates (620) is fixedly connected to one side of the second positioning seat (610) facing the blank (100).

10. The lathe chuck of claim 1, wherein, The flange plate (300) has a gas inlet hole (310) in the center, and a gas passage is arranged on the flange plate (300) and communicates with the gas inlet hole (310), and the gas passage has a gas connection port for connecting an external gas source.

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