A turning jig

Abstract

This application discloses a turning fixture, relating to the field of machine tool fixture technology, addressing the problem of frictional loss caused by direct rigid contact of inclined surfaces in existing tensioning fixtures. The fixture includes: a base with a first groove at the top, a guide sleeve in the first groove, a second groove at the bottom of the guide sleeve, and a guide hole in the middle; a limiting sleeve with a limiting part at the bottom, limiting grooves on both sides of the limiting sleeve, and a guide hole in the middle; a pull rod with a tapered end, connecting parts on both sides of the tapered end, a slider on the connecting part, and sliding grooves on both sides of the slider; the pull rod is connected to a driving device; two expansion blocks, each set on the first limiting groove; a guide block, set on the inner wall of the expansion block, with guide grooves on both sides of the guide block; and two connecting blocks, fixedly set on both sides of the guide block, with connecting part one and connecting part two on both sides of the connecting block. Connecting part one is embedded in the guide groove, and connecting part two is slidably set in the sliding groove.

Description

Technical Field

[0001] This utility model relates to the field of machine tool fixture technology, and in particular to a turning fixture. Background Technology

[0002] In the turning process of tank-type parts, when turning the bottom surface of the tank, it is necessary to clamp and position the inner cavity of the tank using a fixture to keep the bottom of the tank in a fixed position relative to the machining tool, so as to ensure the perpendicularity of the bottom surface of the tank to the inner cavity of the tank after machining. The existing expansion fixture works by pulling a tie rod with an inclined surface, so that the inclined surface of the tie rod and the inclined surface of the inner wall of the expansion block go from separation to contact and mutual compression, converting the axial force of the tie rod into the radial force of the expansion block, causing it to expand and press against the tank, thereby achieving the clamping of the tank cavity.

[0003] However, since the inclined surface of the tie rod and the inclined surface of the expansion block are in direct rigid contact, and their relative motion depends on the sliding friction between the inclined surfaces, and in addition, during the processing, metal shavings and other impurities in the working environment are easy to adhere to the surface of the inclined surface. After a period of use, the inclined surface will experience significant frictional wear, which will further lead to deviations in the expansion amount of the expansion block and affect the clamping of the tank.

[0004] Therefore, a new turning fixture is needed to solve the problem of frictional loss caused by direct rigid contact of inclined surfaces during the use of existing tensioning fixtures. Utility Model Content

[0005] The purpose of this application is to provide a new turning fixture that can solve the problem of frictional loss caused by direct rigid contact of inclined surfaces during the use of existing tensioning fixtures.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] This utility model provides a turning fixture, comprising: a base, the top of which has a groove 1, and a driving device is disposed within the groove 1; a guide sleeve, the bottom of which has a groove 2, and a guide hole 1 in the middle of the guide sleeve; a limiting sleeve, the bottom of which has a limiting part, and both sides of which have limiting grooves 1, and the middle of which has a guide hole 2, the limiting sleeve passing through the guide hole 1, the limiting part being located within the groove 2; a pull rod, the end of which has a tapered part, and both sides of which have connecting parts, a slider being disposed on the connecting part, and both sides of the slider having sliding grooves, the pull rod being connected to the driving device; two expansion blocks, which are disposed on the limiting groove 1; a guide block, which is disposed on the inner wall of the expansion block, and both sides of the guide block having guide grooves; and two connecting blocks, which are fixedly disposed on both sides of the guide block, and both sides of the connecting block have a connecting part 1 and a connecting part 2, the connecting part 1 being embedded in the guide groove, and the connecting part 2 being slidably disposed in the sliding groove.

[0008] Furthermore, a stepped hole is provided at the top of the tapered part, which is used to fix the tapered part to the top of the tie rod with a fixing screw;

[0009] Furthermore, a circular plate is provided at the bottom of the pull rod, the circular plate is located in the groove, and the circular plate is set on the output end of the drive device.

[0010] Furthermore, an opening is provided in the middle of the base to accommodate the drive device, and a fixing plate is provided at the bottom of the base.

[0011] Furthermore, the limiting part of the limiting sleeve extends into the top of the second groove and is fixed by screws.

[0012] Furthermore, an annular sleeve is provided at the top of the guide hole two, and the annular sleeve is threadedly connected to the limiting sleeve.

[0013] Furthermore, the surface of the connecting part is provided with a mounting hole one, and one side of the slider is provided with a corresponding mounting hole two, for fixing the slider to the connecting part by screws. A strip groove is also provided on one side of the slider.

[0014] Furthermore, the inner wall of the expansion block is provided with a groove three, a guide groove two is provided on the groove three, and a corresponding guide part is provided on the guide block.

[0015] Furthermore, the inner wall of the limiting groove is inclined to provide a limiting slope, and the two sides of the expansion block are provided with guide slopes corresponding to the limiting slope.

[0016] Furthermore, the outer wall of the expansion block is set vertically, while the inner wall of the expansion block is set inclined.

[0017] The technical effects are as follows:

[0018] By setting connecting parts on both sides of the connecting block to form a U-shape, the sides of the guide block and slider, which are equipped with guide grooves and slides, are defined. The guide block is driven to slide parallel to both sides by a pull rod. Connecting blocks are set on both sides of the slider to form a slide rail. Guide blocks are set on both sides of the tapered part of the pull rod to slide on the slide rail. The tapered part at the end of the pull rod does not directly contact the expansion block, avoiding high-pressure friction concentrated on the inclined surface and making the force on the expansion block more uniform. This prevents local friction overload during transmission and reduces the embedding of impurities into the inclined surface fit gap, making the movement of the expansion block more stable. This is different from the existing expansion clamps with direct rigid contact, thus solving the problem of friction loss caused by direct rigid contact on the inclined surface during the use of existing tension clamps. Attached Figure Description

[0019] Figure 1 This is a simplified structural diagram of the turning fixture of this utility model.

[0020] Figure 2 This is a schematic diagram of the tie rod and expansion block of the turning fixture of this utility model.

[0021] Figure 3 This is a schematic diagram of the guide block structure of the turning fixture of this utility model.

[0022] Figure 4 This is a schematic diagram of the slider structure of the turning fixture of this utility model.

[0023] Figure 5 This is an exploded view of the guide sleeve and limit sleeve of the turning fixture of this utility model.

[0024] Figure 6 This is a schematic diagram of the tie rod of the turning fixture of this utility model.

[0025] Figure 7 This is a schematic diagram of the expansion block structure of the turning fixture of this utility model.

[0026] In the attached image:

[0027] 1. Main body, 2. Fixing plate, 3. Base, 4. Guide sleeve, 5. Limiting sleeve, 6. Expansion block, 7. Pull rod, 8. Guide block, 9. Connecting block;

[0028] 301. Groove 1; 302. Foot; 401. Guide Hole 1

[0029] 501. Annular sleeve; 502. Limiting groove; 503. Limiting part;

[0030] 601. Guide slope; 602. Groove three; 603. Groove four;

[0031] 701, slider; 702, slide groove; 703, strip groove; 704, circular plate; 705, stepped hole; 706, connecting part.

[0032] 801. Guide groove; 802. Guide section; 803. Mounting hole three. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other.

[0037] Example 1:

[0038] like Figure 4As shown, in this embodiment, the workpiece is applied to a tank-like structure with a cavity in the middle. When turning the bottom of the tank, to ensure its stability during the turning process and avoid displacement or vibration due to cutting forces, the cavity structure in the middle of the tank needs to be reliably clamped to maintain a fixed posture relative to the machine tool. Existing solutions use a drive mechanism to pull a tie rod with an inclined surface, causing the inclined surface of the tie rod to move from separation to contact and mutual compression with the inclined surface of the expansion block's inner wall. The wedge effect of the inclined surface converts the axial driving force of the tie rod into the radial expansion force of the expansion block, thereby achieving the compression of the tank cavity. Clamping of the body: When turning the bottom of a forged can body, since the can body needs to be set horizontally, the existing clamping device has direct rigid contact between the inclined surface of the tie rod and the inclined surface of the expansion block, and the relative movement between the two depends on the sliding friction between the inclined surfaces. In addition, during the machining process, impurities such as cutting fluid and metal chips easily adhere to the surface of the inclined surfaces, further aggravating the wear of the inclined surfaces, which will lead to deviations in the expansion amount of the expansion block, resulting in positioning errors during turning. Therefore, a new turning fixture is needed to solve the above problems. The following devices can improve the expansion device to solve the above problems:

[0039] like Figures 1 to 6 As shown, a turning fixture of this utility model includes: a base 3, with a groove 301 on the top of the base 3, and a driving device disposed within the groove 301; a guide sleeve 4, with a second groove at the bottom of the guide sleeve 4 and a guide hole 401 in the middle of the guide sleeve 4; a limiting sleeve 5, with a limiting part 503 at the bottom of the limiting sleeve 5, limiting grooves 502 on both sides of the limiting sleeve 5, and a guide hole 401 in the middle of the limiting sleeve 5, through which the limiting sleeve 5 passes, and the limiting part 503 is located within the second groove; and a pull rod 7, with a tapered part at the end of the pull rod 7, and connecting parts 706 on both sides of the tapered part, connecting... A slider 701 is provided on the connecting part 706, and sliding grooves 702 are provided on both sides of the slider 701. The pull rod 7 is connected to the driving device; there are two expansion blocks 6, which are set on the limiting groove 502; there are two guide blocks 8, which are set on the inner wall of the expansion blocks 6, and guide grooves 702 are provided on both sides of the guide blocks 8; there are two connecting blocks 9, which are fixedly set on both sides of the guide blocks 8. Connecting part 7061 and connecting part 7062 are provided on both sides of the connecting blocks 9. Connecting part 7061 is embedded in the guide groove 702, and connecting part 7062 is slidably set in the sliding groove 702.

[0040] Specifically, a stepped hole 705 is provided at the top of the tapered part, which is used to fix the tapered part to the top of the tie rod 7 with a fixing screw;

[0041] Specifically, a circular plate 704 is provided at the bottom of the pull rod 7. The circular plate 704 is slidably disposed in the groove 301. The circular plate 704 is connected to the output end of the drive device, so that the drive device can drive the pull rod 7 to move up and down.

[0042] Specifically, the base 3 has an opening in the middle to accommodate the drive device, the base 3 has a fixing plate 2 at the bottom, and the base 3 has feet 302 with connecting holes at the bottom to the fixing plate 2 by screws. The fixing plate 2 is fixedly mounted on the main body 1 and the base 3 is horizontally positioned. The drive device is fixedly mounted on the fixing plate 2.

[0043] Specifically, the limiting part 503 of the limiting sleeve 5 extends into the top of the groove 2 and is fixed by screws.

[0044] Specifically, an annular sleeve 501 is provided at the top of the guide hole 2, and the annular sleeve 501 is threadedly connected to the limiting sleeve 5.

[0045] Specifically, the surface of the connecting part 706 is provided with a mounting hole one, and the side of the slider 701 is provided with a corresponding mounting hole two, which is used to fix the slider 701 to the connecting part 706 by screws. The side of the slider 701 is also provided with a strip groove 704 as an oil groove.

[0046] Specifically, the inner wall of the expansion block 6 is provided with a groove 602, the groove 602 is provided with a groove 603, the guide block 8 is provided with a corresponding guide part 802, and the guide groove 801 is also provided with a number of mounting holes 803 for fixing to the connecting part 706 by screws.

[0047] Specifically, the inner wall of the limiting groove 502 is inclined to provide a limiting slope, and the expansion block 6 is provided with guide slopes 601 on both sides corresponding to the limiting slope.

[0048] Specifically, the outer wall of expansion block 6 is set vertically, and the inner wall of expansion block 6 is set inclined.

[0049] The base 3 supports the turning fixture. A groove 301 is provided for installing the guide sleeve 4. A groove 2 at the bottom of the guide sleeve 4 is used to limit the movement direction of the bottom circular plate 704 of the pull plate. The guide sleeve 4 is fitted onto the limiting sleeve 5 to limit the downward movement of the expansion block 6 and to wrap around the bottom part of the limiting groove 502 to increase its strength and prevent the annular sleeve 501 from loosening. The annular sleeve 501 abuts against the bottom of the inner wall of the tank for pre-center positioning and to limit the upward movement of the expansion block 6, so that the expansion block 6 can be driven by the pull rod 7 to move smoothly to both sides to clamp the tank. Connecting parts 706 are provided on both sides of the connecting block 9 to form a U-shape for the guide block 801 with the guide groove 801 and the sliding groove 702. The slider 701 is positioned on the side, allowing the pull rod 7 to slide parallel to the guide block 8 on both sides. The guide block 8 is set on the expansion block 6, and connecting blocks 9 are set on both sides of the guide block 8 to form a slide rail. The slider 701 is set on both sides of the tapered part of the pull rod 7 so that it slides on the slide rail. Thus, the tapered part at the end of the pull rod 7 does not directly contact the expansion block 6, avoiding high-pressure friction concentrated on the inclined surface and making the force on the expansion block 6 more uniform. This prevents local friction overload during transmission, making the movement of the expansion block 6 more stable. This is different from the existing expansion clamps that have direct rigid contact with the inclined surface, and prevents the existing expansion clamps from affecting the verticality of the bottom and the inner control of the tank body during bottom turning.

[0050] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A turning jig characterized by comprising: include: The base has a groove on its top and a guide sleeve on the groove. A guide sleeve, wherein the bottom of the guide sleeve is provided with a second groove and the middle of the guide sleeve is provided with a first guide hole; A limiting sleeve has a limiting part at its bottom, a limiting groove on both sides of the limiting sleeve, and a guide hole in the middle of the limiting sleeve. The limiting sleeve passes through the guide hole and the limiting part is located in the groove. A pull rod, wherein the end of the pull rod is provided with a tapered portion, and the tapered portion is provided with connecting portions on both sides. A slider is provided on the connecting portion, and the slider is provided with sliding grooves on both sides. The pull rod is connected to a drive device. Two expansion blocks are provided on the limiting groove one; A guide block is disposed on the inner wall of the expansion block, and guide grooves are provided on both sides of the guide block; The connecting block comprises two blocks, which are fixedly disposed on both sides of the guide block. Each connecting block has a first connecting part and a second connecting part on both sides. The first connecting part is embedded in the guide groove, and the second connecting part is slidably disposed in the groove.

2. The turning jig according to claim 1, characterized by The tapered part has a stepped hole at its top, which is used to fix the tapered part to the top of the tie rod with a fixing screw.

3. The turning jig according to claim 1, characterized by A circular plate is provided at the bottom of the pull rod, the circular plate is located in the groove, and the circular plate is disposed on the output end of the drive device.

4. The turning fixture according to claim 1, characterized in that, The base has an opening in the middle to accommodate the drive device, and a fixing plate is provided at the bottom of the base.

5. The turning jig according to claim 1, characterized by The limiting part of the limiting sleeve extends into the top of the second groove and is fixed by screws.

6. The turning fixture according to claim 1, characterized in that, The top of the second guide hole is provided with an annular sleeve, which is threadedly connected to the limiting sleeve.

7. The turning fixture according to claim 1, characterized in that, The surface of the connecting part is provided with a mounting hole one, and one side of the slider is provided with a corresponding mounting hole two, for fixing the slider to the connecting part by screws. One side of the slider is also provided with a strip groove.

8. The turning fixture according to claim 1, characterized in that, The inner wall of the expansion block is provided with a groove three, and a guide groove two is provided on the groove three. The guide block is provided with a corresponding guide part.

9. The turning fixture according to claim 1, characterized in that, The inner wall of the limiting groove is inclined with a limiting slope, and the two sides of the expansion block are provided with guide slopes corresponding to the limiting slope.

10. The turning fixture according to claim 1, characterized in that, The outer wall of the expansion block is vertically arranged, and the inner wall of the expansion block is inclined.

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