Lathe fixture

Abstract

The lathe fixture comprises a chuck mechanism, a flange plate, a first positioning assembly, a first clamping assembly, a second positioning assembly and a second clamping assembly. Due to the fact that the first clamping assembly and the first positioning assembly are oppositely arranged, 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, and the blank is clamped and positioned in the first radial direction; therefore, 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 spindle, the first annular groove and the second annular groove can be machined through a lathe tool, and a blind hole can be machined through a drill bit. When the lathe fixture is used for installing and replacing the blank, accurate positioning and clamping of the blank can be achieved only by operating the first clamping assembly and the second clamping assembly, and therefore the clamping efficiency of the blank is improved, and the consistency of the machining size of parts is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of machining equipment, and in particular to a lathe fixture. Background Art

[0002] refer to Figure 1 , Figure 1 It is used to process the blank of special-shaped parts; Figure 2 , Figure 2 Is adopted Figure 1 A special-shaped part with both hexahedral and cylindrical structures is processed from a blank, and the special-shaped part includes a cuboid part 110, and a cylindrical part 120 is provided on a rectangular end face of the cuboid part 110, and the cylindrical part 120 is not located at the geometric center of the end face. The cylindrical part 120 has a first annular groove 121, the rectangular end face has a second annular groove 111 surrounding the cylindrical part, and the end face of the cylindrical part 120 has a blind hole 122. The blank of the special-shaped part has been processed with the cuboid part 110 and the cylindrical part 120 located at a rectangular end face of the cuboid part, and the central axis of the cylindrical part 120 does not pass through the center point of the rectangular end face. The outer side of the cylindrical part 120 needs to be processed with a first annular groove 121, and the side of the cuboid part connecting the cylindrical part needs to be processed with a second annular groove 111 whose central axis coincides with the central axis of the cylindrical part, and a blind hole 122 needs to be processed at the center of the end face of the cylindrical part.

[0003] In the related technology, the commonly used processing method is to use an ordinary lathe or CNC lathe with a manually clamped lathe fixture for turning. The specific processing method is: 1. Design and manufacture a special eccentric lathe fixture for manual clamping, and use the special fixture to manually clamp the workpiece to ensure that the rotation center of the cylinder to be processed is concentric with the rotation center of the lathe spindle. 2. Use an external cylindrical turning tool and a grooving tool to turn the outer cylindrical surface. 3. Use a drill bit and an internal boring tool to drill and bore the inner cylindrical surface. The disadvantages of this processing method are: manual clamping of the workpiece increases the labor intensity of the workers, and the clamping efficiency is low; the clamping positioning accuracy is low, resulting in poor product size consistency. Summary of the invention

[0004] The embodiment of the present application provides a lathe fixture, which can solve the technical problems of low clamping efficiency and poor product size consistency when processing a special-shaped part with both hexahedral and cylindrical structures in the prior art. The technical solution is as follows:

[0005] A lathe fixture for clamping a blank, the blank comprising a rectangular portion and a cylindrical portion located at a rectangular end face of the rectangular portion, the central axis of the cylindrical portion does not pass through the center point of the rectangular end face, the outer side face of the cylindrical portion needs to be processed with a first annular groove, the side face of the rectangular portion connecting the cylindrical portion needs to be processed with a second annular groove 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 processed with a blind hole, the lathe fixture comprises: a chuck mechanism, comprising a cylindrical chuck main body connected to the lathe spindle, a first moving block and a second moving block which can move along a first radial direction of the chuck main body are provided on one side of the chuck main body, and the first moving block and the second moving block are respectively located at the center of the chuck main body Both sides of the axis; a flange, one side of which is connected to the chuck body, and the other side is equipped with a first positioning component and a first clamping component arranged along the second radial direction of the chuck body, and a second positioning component and a second clamping component 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 component is connected to the first moving block, and the second clamping component is connected to the second moving block; the first positioning component, the first clamping component, the second positioning component and the second clamping component are distributed on the four sides of the rectangular body, the first positioning component and the second positioning component are used to position the blank, and the first clamping component and the second clamping component are used to clamp the blank so that the central axis of the cylindrical part is colinear with the central axis of the spindle of the lathe.

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

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

[0008] Optionally, the first clamping assembly also includes a first compression spring; the first clamping shaft has a retaining ring at one end facing away from the blank, and the first compression spring is sleeved on the first clamping shaft and is located between the retaining ring and the side of the first fixed support facing away from the blank.

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

[0010] Optionally, the first clamping shaft includes two sub-clamping shafts arranged axially along the flange plate, wedge grooves are respectively provided on opposite sides of the two sub-clamping shafts, the wedge piece passes through the two opposite wedge grooves, and the first inclined surface is parallel to the inclined surfaces of the wedge grooves of the two sub-clamping shafts.

[0011] Optionally, the number of the second clamping shafts is four, the four second clamping shafts are evenly distributed on the second movable support, and each second clamping shaft is correspondingly configured with a second compression spring.

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

[0013] Optionally, the second positioning assembly further includes a plurality of second positioning plates of different thickness specifications, and any one of the second positioning plates is fixedly connected to a side of the second positioning seat facing the blank.

[0014] Optionally, the center of the flange is provided with an air inlet hole, the flange is provided with a gas channel connected with the air inlet hole, the gas channel has an air inlet, and the air inlet is used to connect to an external air source.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0016] A lathe fixture comprises: a chuck mechanism, a flange, 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 and are used to position two adjacent side surfaces of the rectangular part of the blank so that the central axis of the cylindrical part is colinear with the central axis of the main shaft of the lathe, and the first clamping assembly and the second clamping assembly are used to fix the blank. Since the first clamping assembly and the first positioning assembly are arranged relative to each other, 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 arranged relative to each other, and 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, and the lathe spindle is started to rotate, and the central axis of the cylindrical part coincides with the central axis of the lathe spindle, and the first annular groove and the second annular groove can be machined by a turning tool, and a blind hole can be machined by a drill. Compared with the common method in the related art, which requires four sides to be positioned separately for clamping the blank, and the positioning references are inconsistent each time, the first positioning assembly and the second positioning assembly of the lathe fixture of the present application are relatively fixed and have been fixed on the flange, and the installation and replacement of the blank only requires the operation of the first clamping assembly and the second clamping assembly to achieve accurate positioning and clamping of the blank, thereby improving the clamping efficiency of the blank and ensuring the consistency of the processing size of the parts.

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

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is the blank before machining of the special-shaped parts to be clamped by the lathe angle of this application;

[0020] Figure 2 Is adopted Figure 1 Stereoscopic image of special-shaped parts machined from blanks;

[0021] Figure 3 is a three-dimensional schematic diagram of a lathe fixture provided in an embodiment of the present application;

[0022] Figure 4 It is a three-dimensional schematic diagram of a lathe fixture clamping a blank provided in an embodiment of the present application;

[0023] Figure 5 yes Figure 4 Schematic diagram of the decomposition of

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

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

[0026] Figure 8 yes Figure 7 Sectional view at AA in the middle;

[0027] Fig. 9 yes Figure 7 Cross-section at the middle BB;

[0028] Fig.10 is a three-dimensional schematic diagram of a first positioning seat provided in an embodiment of the present application;

[0029] Fig.11 is a three-dimensional schematic diagram of a first positioning plate provided in an embodiment of the present application;

[0030] Fig.12 is a three-dimensional schematic diagram of a first fixed support provided in an embodiment of the present application;

[0031] Fig.13 is a three-dimensional schematic diagram of a first movable support provided in an embodiment of the present application;

[0032] Fig.14 is a three-dimensional schematic diagram of a wedge-shaped member provided in an embodiment of the present application;

[0033] Fig.15 is a three-dimensional schematic diagram of a sub-compression shaft provided in an embodiment of the present application;

[0034] Fig.16 is a three-dimensional schematic diagram of a second positioning seat provided in an embodiment of the present application;

[0035] Fig.17 is a three-dimensional schematic diagram of a second positioning plate provided in an embodiment of the present application;

[0036] Fig.18 is a three-dimensional schematic diagram of a second fixed support provided in an embodiment of the present application;

[0037] Fig.19 is a three-dimensional schematic diagram of a first movable support provided in an embodiment of the present application;

[0038] Fig. 20It is a three-dimensional schematic diagram of the flange provided in an embodiment of the present application.

[0039] Description of Reference Numerals

[0040] 100-blank; 110-rectangular body; 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; 310-air inlet;

[0043] 400-first positioning assembly; 410-first positioning seat; 411-first chamfering angle; 420-first positioning plate;

[0044] 500-first clamping assembly; 510-first fixed support; 511-first through hole; 520-first clamping shaft; 521-retaining ring; 522-sub-compression shaft; 523-wedge groove; 530-first movable support; 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 support; 711-second chamfered angle; 711-second through hole; 720-second clamping shaft; 730-second movable support; 740-second compression spring;

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

[0048] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0049] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the "upper" and "lower" of the corresponding parts in the use state relative to the direction of gravity, and "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding parts' own contours. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0050] refer to Figure 1 , Figure 1 It is used to process the blank of special-shaped parts; Figure 2 , Figure 2 Is adopted Figure 1 The blank is processed into a special-shaped part with both hexahedral and cylindrical structures, and the special-shaped part includes a cuboid part 110, and a cylindrical part 120 is provided on a rectangular end face of the cuboid part 110, and the cylindrical part 120 is not located at the geometric center of the end face. The cylindrical part 120 has a first annular groove 121, the rectangular end face has a second annular groove 111 surrounding the cylindrical part 120, and the end face of the cylindrical part 120 has a blind hole 122.

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

[0052] In the related technology, the commonly used processing method is to use a common lathe or a CNC lathe with a manually clamped lathe fixture for turning. The specific processing method is:

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

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

[0055] 3. Use a drill bit and an internal boring cutter 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 automatic production lines; and it cannot meet the needs of automatic loading and unloading of six-degree-of-freedom industrial rail robots or truss robots.

[0057] The present application embodiment provides a lathe fixture, referring to Figures 3 to 20 , used to clamp the blank 100 so that the central axis of the cylindrical part 120 is colinear with the central axis of the spindle rotation of the lathe, so as to facilitate the lathe to process 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 assembly 400, a first clamping assembly 500, a second positioning assembly 600 and a second clamping assembly 700.

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

[0059] refer to Figures 3 to 5 , one side of the flange 300 is connected to the chuck body 210, and the other side is installed with a first positioning assembly 400 and a first clamping assembly 500 arranged along the second radial direction of the chuck body 210, and 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 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 the four sides of the rectangular parallelepiped 110, the first positioning assembly 400 and the second positioning assembly 600 are used to position the blank 100, and the first clamping assembly 500 and the second clamping assembly 700 are used to clamp the blank 100 so that the central axis of the cylindrical portion 120 is in line with the central axis of the spindle 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 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 chuck body 210 is arranged with the second positioning assembly 600 and the second clamping assembly 700 in the first radial direction.

[0061] The first positioning assembly 400 and the second positioning assembly 600 are fixedly connected to the flange 300 and are used to position two adjacent sides of the cuboid portion 110 of the blank 100. Therefore, when processing and manufacturing the first positioning assembly 400 and the second positioning assembly 600, 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 portion 120 is collinear with the central axis of the lathe spindle. The first clamping assembly 500 and the second clamping assembly 700 are used to fix the blank 100.

[0062] Since the first clamping assembly 500 and the first positioning assembly 400 are arranged relative to each other, the first clamping assembly 500 applies a clamping force to the blank 100, so as to 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 relative to each other, and the second clamping assembly 700 applies a clamping force to the blank 100, so as to clamp and position the blank 100 in the first radial direction; in this way, the blank 100 is accurately positioned and reliably connected to the flange 300, and the lathe spindle is started to rotate, and the central axis of the cylindrical portion 120 coincides with the central axis of the lathe spindle, and the first annular groove 121 and the second annular groove 111 can be machined by a turning tool, and the blind hole 122 can be machined by a drill bit. Compared with the common method in the related art that clamps the blank 100 and requires four sides to be positioned separately, and the positioning references are inconsistent each time the clamping is performed, the first positioning component 400 and the second positioning component 600 of the lathe fixture of the present application are relatively fixed and have been fixed on the flange 300. To install and replace the blank 100, only the first clamping component 500 and the second clamping component 700 need to be operated 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 processing size of the parts.

[0063] In the embodiment of the present application, the chuck mechanism 200 can be processed by itself, or modified from an existing two-claw chuck. For example, the two claws of the two-claw chuck are disassembled, and only the chuck body 210 and the first moving block 220 and the second moving block 230 for driving the two claws to move are retained. The two-claw chuck has a driving 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 the present application, reference Figure 4 , Figure 5 and Fig.10 As shown, the first positioning assembly 400 includes a first positioning seat 410 , and the first positioning seat 410 is fixedly connected to the flange 300 .

[0065] refer to Figure 4 , Figure 5 and Fig.16 As shown, the second positioning assembly 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 , Fig.12 and Fig.15As shown, the first clamping assembly 500 includes a first fixed support 510, a first clamping 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 clamping shaft 520 is movably arranged in the first through hole 511, and the first movable support 530 is movably connected to the flange 300, and is used to drive the first clamping shaft 520 to move linearly along the first through hole 511; in this way, in the second radial direction of the chuck body 210, the movement of the first movable support 530 can drive the first clamping shaft 520 to move toward the first positioning seat 410, so that the first positioning assembly 400 and the first clamping assembly 500 position and clamp the blank 100.

[0067] Similarly, reference Figure 4 , Figure 5 , Fig.18 and Fig.19 As shown, the second clamping assembly 700 includes a second fixed support 710, a second clamping 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 clamping 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 300 to drive the second clamping shaft 720 to move along the second through hole 711. In this way, in the first radial direction of the chuck body 210, the second movable support 730 moves to drive the second clamping shaft 720 to move toward the second positioning seat 610, so that the second positioning assembly 600 and the second clamping assembly 700 position and clamp the blank 100.

[0068] According to an embodiment of the present application, referring to Figure 5 , Figure 7 and Figure 8 As shown, the first moving block 220 is fixedly connected to the first movable support 530, and the first movable support 530 is connected to a wedge 800 perpendicular to the first clamping shaft 520, and the wedge 800 has a first inclined surface 810, and the first inclined surface 810 is located on the side of the wedge 800 close to the central axis of the flange 300, and the first clamping shaft 520 is provided with a wedge-shaped through hole for the wedge 800 to pass through, and the first inclined surface 810 is parallel to the inclined surface of the wedge-shaped through hole; when the first moving block 220 moves toward the direction close to the central axis of the chuck, the first movable support 530 moves to drive the wedge 800 to move, and the wedge 800 squeezes the wedge-shaped through hole of the first clamping shaft 520, forcing the first clamping shaft 520 to move along the first through hole 511 of the first fixed support 510 and press against the blank 100.

[0069] Similarly, the second moving block 230 is fixedly connected to the second movable support 730. When the second moving block 230 moves toward the central axis of the chuck body 210, the second movable support 730 moves to drive the second clamping shaft 720 to move and abut against the blank 100.

[0070] According to an embodiment of the present application, referring to Figure 5 , Figure 8 and Fig. 9 As shown, the first clamping assembly 500 further includes a first compression spring 540; the first clamping shaft 520 has a retaining ring 521 at one end away from the blank 100, and the first compression spring 540 is sleeved on the first clamping shaft 520 and is located between the retaining 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 clamping shaft 520 can always have a pre-tightening force away from the blank 100. When the first moving block 220 moves in a direction away from the central axis of the chuck body 210, the wedge 800 gradually withdraws from the wedge-shaped through hole of the first movable support 530, and the first clamping shaft 520 automatically moves in a direction away from the blank 100 under the action of the first compression spring 540, thereby loosening the blank 100 in the second radial direction of the chuck body 210.

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

[0072] According to an embodiment of the present application, referring to Figure 8 and Fig. 9 As shown, the first clamping shaft 520 includes two sub-clamping shafts 522 arranged along the axial direction of the flange 300, and wedge-shaped grooves 523 are respectively arranged on the opposite sides of the two sub-clamping shafts 522. The wedge 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-clamping shafts 522. In this embodiment, the two sub-clamping shafts 522 are arranged perpendicular to the movement direction of the wedge 800, that is, the wedge 800 is located between the two sub-clamping shafts 522, and the movement of the wedge 800 can simultaneously drive the movement of the two sub-clamping shafts 522, so that the blank 100 is subjected to more uniform force 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 order to make the blank 100 more evenly stressed in the first radial direction of the chuck body 210, the number of the second clamping shafts 720 is four, and the four second clamping shafts 720 are evenly distributed on the second movable support 730, and each second clamping shaft 720 is correspondingly configured with a second compression spring 740.

[0074] According to an embodiment of the present application, in actual production, the cuboid portion 110 of the special-shaped part may have more sizes, such as different widths or different lengths. In order to enable the lathe fixture to adapt to blanks 100 of more sizes and specifications to process special-shaped parts of more sizes and specifications, the first positioning assembly 400 also includes a plurality of first positioning plates 420 of thickness specifications, and any of the first positioning plates 420 is fixedly connected to the side of the first positioning seat 410 facing the blank 100. Correspondingly, the second positioning assembly 600 also includes a plurality of second positioning plates 620 of thickness specifications, and any of the second positioning plates 620 is fixedly connected to the side of the second positioning seat 610 facing the blank 100. By such a configuration, when it is necessary to clamp blanks 100 of other sizes, it is only necessary to replace the corresponding first positioning plates 420 and / or second positioning plates 620.

[0075] According to an embodiment of the present application, referring to Fig. 20 As shown, in order to check whether the blank 100 is reliably clamped, the center of the flange 300 has an air inlet 310, and the flange 300 is provided with a gas channel connected to the air inlet 310, and the gas channel has an air connection port, and the air connection port is used to connect to an external air source. Since the bottom of the blank 100 is flat, when the blank 100 is clamped, theoretically, the bottom of the blank 100 will cover the air inlet 310, and an external air source of a certain pressure is introduced into the air inlet channel. The operator can set the pressure of the external air source introduced according to experience, and according to experience, set the external air source pressure that the blank 100 will not loosen when the blank 100 is input, which means that the blank 100 is clamped. This method can simply and effectively determine whether the blank 100 is clamped.

[0076] After the lathe fixture of the embodiment of the present application is processed, the center of mass of the lathe fixture may not be at the geometric center of the lathe fixture, which may have an adverse effect on the rotation of the lathe. In order to make the center of mass of the lathe fixture be at the geometric center, the blank 100 can be installed on the lathe fixture and then debugged 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] Exemplary, reference Figure 2 and Fig.10As shown, in the embodiment of the present application, the first fixed support 510 is provided with a first chamfer angle 411, referring to Figure 2 and Fig.19 As shown, setting a second bevel angle 711 on the second movable support 730 can ensure that the center of mass of the lathe fixture in the embodiment of the present application is on the central axis of the lathe spindle. In other embodiments, the center of mass of the lathe fixture can also be achieved on the central axis of the lathe spindle by setting bevel angles on other components. The present application does not impose any restrictions on this.

[0078] The following is an explanation of the implementation principle of the present application embodiment with practical operation steps:

[0079] 1. After removing the two jaws of the two-jaw chuck, install the flange 300 onto the chuck body 210;

[0080] 2. Install the first positioning seat 410 and the first positioning plate 420 to the flange 300; install the second positioning seat 610 and the second positioning plate 620 to the flange 300;

[0081] 3. Connect the first fixed support 510 and the second fixed support 710 to the flange 300, and then connect the first movable support 530 to the first moving block 220, and the second movable support 730 to the second moving block 230; insert one end of the wedge 800 into the wedge groove 523 of the first clamping shaft 520, and fix the other end to the first movable support 530;

[0082] 4. Place the blank 100 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, respectively move the first moving block 220 toward the central axis of the chuck body 210, drive the first clamping shaft 520 toward the central axis of the chuck body 210, move the second moving block 230 toward the central axis of the chuck body 210, and drive the second clamping shaft 720 toward the central axis of the chuck body 210, so as to position and clamp the blank 100;

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

[0085] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0086] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0087] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by 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 a rectangular end face of the cuboid portion (110), the central axis of the cylindrical portion (120) does not pass through the central point of the rectangular end face, a first annular groove (121) needs to be machined along the outer side face of the cylindrical portion (120), a second annular groove (111) whose central axis coincides with the central axis of the cylindrical portion (120) needs to be machined on the side face of the cuboid portion (110) connected to the cylindrical portion (120), a blind hole (122) needs to be machined at the center of the end face of the cylindrical portion (120), characterized in that: The lathe fixture comprises: A chuck mechanism (200) comprises a cylindrical chuck body (210) connected to a main shaft of a lathe, wherein a first moving block (220) and a second moving block (230) movable along a first radial direction of the chuck body (210) are arranged on one side of the chuck body (210), and the first moving block (220) and the second moving block (230) are respectively located on two sides of a central axis of the chuck body (210); A flange (300) has one side connected to 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), and 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 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 rectangular parallelepiped portion (110); the first positioning assembly (400) and the second positioning assembly (600) are used to position the blank (100); the first clamping assembly (500) and the second clamping assembly (700) are used to clamp the blank (100) so that the central axis of the cylindrical portion (120) is colinear with the central axis of the spindle of the lathe.

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

3. The lathe fixture according to claim 2, characterized in that: The first moving block (220) is fixedly connected to the first movable support (530), the first movable support (530) is connected to a wedge-shaped piece (800) perpendicular to the first clamping shaft (520), the wedge-shaped piece (800) has a first inclined surface (810), and the first inclined surface (810) is located on a side of the wedge-shaped piece (800) close to the central axis of the flange (300), the first clamping shaft (520) is provided with a wedge-shaped through hole for the wedge-shaped piece (800) to pass through, and the first inclined surface (810) is parallel to the inclined surface of the wedge-shaped through hole; The second moving block (230) is fixedly connected to the second movable support (730).

4. The lathe fixture according to claim 3, characterized in that: The first clamping assembly (500) also includes a first compression spring (540); the first clamping shaft (520) has a retaining ring (521) at one end facing away from the blank (100); the first compression spring (540) is sleeved on the first clamping shaft (520) and is located between the retaining ring (521) and the side of the first fixed support (510) facing away from the blank (100).

5. The lathe fixture according to claim 4, characterized in that: The second clamping assembly (700) further comprises a second compression spring (740); the second compression spring (740) is sleeved on the second clamping shaft (720) and is located between the second fixed support (710) and the second movable support (730).

6. The lathe fixture according to claim 5, characterized in that: The first clamping shaft (520) includes two sub-clamping shafts (522) arranged axially along the flange (300), and wedge-shaped grooves (523) are respectively provided on opposite sides of the two sub-clamping shafts (522). The wedge-shaped member (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-clamping shafts (522).

7. The lathe fixture according to claim 6, characterized in that: The number of the second clamping shafts (720) is four, and the four second clamping shafts (720) are evenly distributed on the second movable support (730), and each second clamping shaft (720) is correspondingly configured with a second compression spring (740).

8. The lathe fixture according to claim 2, characterized in that: The first positioning assembly (400) further comprises a plurality of first positioning plates (420) of different thickness specifications, and any one of the first positioning plates (420) is fixedly connected to a side of the first positioning seat (410) facing the blank (100).

9. The lathe fixture according to claim 2, characterized in that: The second positioning assembly (600) further comprises a plurality of second positioning plates (620) of different thickness specifications, and any one of the second positioning plates (620) is fixedly connected to a side of the second positioning seat (610) facing the blank (100).

10. The lathe fixture according to claim 1, characterized in that: The center of the flange (300) is provided with an air inlet (310), and the flange (300) is provided with a gas channel connected with the air inlet (310), and the gas channel has a gas connection port, and the gas connection port is used to connect to an external gas source.

Images