CN110695732A - Automatic centering clamp for large annular thin-wall part - Google Patents
Automatic centering clamp for large annular thin-wall part Download PDFInfo
- Publication number
- CN110695732A CN110695732A CN201911038204.3A CN201911038204A CN110695732A CN 110695732 A CN110695732 A CN 110695732A CN 201911038204 A CN201911038204 A CN 201911038204A CN 110695732 A CN110695732 A CN 110695732A
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- China
- Prior art keywords
- gear
- bottom plate
- plate
- locking
- star
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
Abstract
A large-scale annular thin-walled part automatic centering clamp comprises a bottom plate, wherein a central boss of the bottom plate is connected with a star-shaped turntable through a bearing, an internal gear is connected on the star-shaped turntable, a cylindrical boss on a sliding block is fixed in a spiral groove of the star-shaped turntable, the sliding block is connected with a supporting plate through an adjusting bolt, the supporting plate and the sliding block are arranged in a sliding groove of the bottom plate and are fixed on the bottom plate through a pressing plate, and an annular part is placed on the bottom plate and is tightly jacke; the inner gear is meshed with the gear, the gear is connected to the rotating shaft, the rotating shaft is installed on the bottom plate, the end part of the rotating shaft is connected with a handle transverse plate, and the other end of the handle transverse plate is connected with a handle; the gear is meshed with the locking gear, the locking gear is arranged on the locking shaft, and the locking shaft is arranged on the bottom plate; the positioning device is simple in structure and convenient to use, can quickly and accurately position the large annular part, effectively shortens the adjusting time of the part tool, and improves the machining efficiency.
Description
Technical Field
The invention relates to the technical field of thin-wall annular part cutting machining, in particular to an automatic centering clamp for a large annular thin-wall part.
Background
The annular part is one of the very common parts in mechanical parts, and is usually fixed on a machine tool worktable by a three-jaw chuck, and then the part is cut. However, the size of a large annular part such as a casing in the aerospace field is usually large, and the size of a three-jaw chuck is small, so that the three-jaw chuck cannot be used for clamping and positioning the large annular part. At present, for the cutting processing of this type of parts, the clamping of a rigid clamp is generally adopted, the whole processing process fixes the parts on the clamp, and the residual stress and the deformation of the parts are not considered. However, due to the thin wall thickness design of the parts, the parts are very easy to deform due to the release of residual stress after being processed, and the deformed parts hardly meet the high precision requirement in the field, so that the yield of the parts is generally low.
In recent years, research shows that the part machining precision can be improved by loosening the clamp of the part between the part machining processes, releasing the residual stress of the part and then re-clamping the part, so that the machining deformation of the part can be effectively controlled. The processing mode needs to loosen the clamp of the part for many times and reposition and clamp the part in the processing procedure, and the traditional rigid clamp can not meet the requirement of releasing residual stress, so that the part is usually manually adjusted and then compressed onto a platform at present. The deformed part positioning reference is also changed, so that the time and labor cost are needed to be spent for re-aligning and positioning, and the machining efficiency of the parts is reduced sharply.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the automatic centering clamp for the large annular thin-wall part, which can realize quick and accurate positioning of the large annular part, effectively shorten the adjustment time of a part tool and improve the machining efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a large-scale annular thin-walled part automatic centering clamp comprises a bottom plate 1, wherein a central boss of the bottom plate 1 is connected with a star-shaped turntable 7 through a bearing 14, an internal gear 8 is connected on the star-shaped turntable 7, a cylindrical boss 25 on a sliding block 5 is fixed in a spiral groove 21 of the star-shaped turntable 7, the sliding block 5 is connected with a supporting plate 2 through an adjusting bolt 4, the supporting plate 2 and the sliding block 5 are installed in a sliding groove 18 of the bottom plate 1 and are fixed on the bottom plate 1 through a pressing plate 3, and an annular part 6 is placed on the bottom plate 1 and is tightly jacked;
the inner gear 8 is meshed with the gear 9, the gear 9 is connected to a rotating shaft 10, the rotating shaft 10 is installed in a copper sleeve fixing hole 19 of the bottom plate 1 through a copper sleeve 13, a handle transverse plate 11 is connected to the end portion of the rotating shaft 10, and a handle 12 is connected to the other end of the handle transverse plate 11;
the gear 9 is engaged with a locking gear 15, the locking gear 15 is arranged on a locking shaft 17 through a locking gear copper sleeve 16, and the locking shaft 17 is arranged on the bottom plate 1.
More than 3 sliding grooves 18 are uniformly distributed on the bottom plate 1 along the circumferential direction, and a supporting plate 2 and a sliding block 5 are arranged in each sliding groove 18.
The front end of the supporting plate 2 is an arc surface, and the arc radius of the supporting plate 2 is smaller than that of the annular part 6.
The modules of the internal gear 8, the gear 9 and the locking gear 15 are the same.
The invention has the beneficial effects that:
1. the large-scale annular part can be quickly positioned, and the part clamping and adjusting time is reduced;
2. the supporting plates 2 support the interior of the annular part 6, so that the supporting rigidity of the annular part 6 can be effectively improved, and the stability of the annular part 6 in the machining process can be improved;
3. the length of the supporting plate 2 can be designed according to the size of the annular part 6, so that the same clamp can be simultaneously suitable for clamping a plurality of annular parts 6.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is an enlarged view of a point a in fig. 1.
Fig. 4 is a cross-sectional view of the base plate 1 of fig. 1.
Fig. 5 is a top view of the base plate 1 of fig. 1.
Fig. 6 is a cross-sectional view of the star wheel 7 of fig. 1.
Fig. 7 is a top view of the star wheel 7 of fig. 1.
Fig. 8 is a sectional view of the internal gear 8 in fig. 1.
Fig. 9 is a plan view of the ring gear 8 in fig. 1.
Fig. 10 is an enlarged sectional view of the support plate 2 of fig. 1.
Fig. 11 is a top view of the support plate 2 of fig. 1.
Fig. 12 is a cross-sectional view of the slider 5 of fig. 1.
Fig. 13 is a top view of the slider 5 of fig. 1.
Fig. 14 is a schematic view of the adjusting bolt 4.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
Referring to fig. 1-14, the automatic centering fixture for the large annular thin-wall part comprises a base plate 1, wherein the base plate 1 is used for mounting all parts of the fixture, a central boss of the base plate 1 is fixedly connected with an inner hole of a bearing 14, an outer ring of the bearing 14 is fixedly connected with an inner ring of a star-shaped turntable 7, the bearing 14 is used for improving the positioning precision and the rotating precision of the star-shaped turntable 7, a gear fixing hole 22 is formed in the star-shaped turntable 7, an internal gear 8 is provided with a fixing hole 23 and a spiral groove 21, the star-shaped turntable 7 is connected with an internal gear 8 through the gear fixing hole 22 and the fixing hole 23;
the cylindrical boss 25 on the sliding block 5 is fixed in the spiral groove 21 of the star-shaped turntable 7, and the spiral groove 21 can generate pulling force and pushing force on the sliding block 5 in the rotation process of the star-shaped turntable 7, so that all the sliding blocks 5 can slide along the sliding groove 18 simultaneously; the adjusting bolt 4 penetrates through a bolt hole in the sliding block 5 to be connected with the T-shaped groove 24 in the supporting plate 2, the adjusting bolt 4 is used for connecting the supporting plate 2 and the sliding block 5, and the distance between the supporting plate 2 and the sliding block 5 is adjusted; the supporting plate 2 and the sliding block 5 are arranged in a sliding groove 18 of the bottom plate 1 and are fixed on the bottom plate 1 through the pressing plate 3, and the annular part 6 is placed on the bottom plate 1 and is tightly propped by the supporting plate 2; the sliding grooves 18 and the pressing plates 3 on the bottom plate 1 are used for providing sliding tracks for the supporting plate 2 and the sliding blocks 5, so that the sliding precision of the supporting plate 2 and the sliding blocks 5 is improved;
the internal gear 8 is meshed with a gear 9, the gear 9 is connected to a rotating shaft 10, and the gear 9 is used for driving the internal gear 8 to rotate; the rotating shaft 10 is fixed in the copper sleeve 13, the copper sleeve 13 is fixed in the copper sleeve fixing hole 19 of the bottom plate 1, and the copper sleeve 13 is used for improving the installation precision of the rotating shaft 10 and protecting the rotating shaft 10 from being abraded; a handle transverse plate 11 is fixed at the end of the rotating shaft 10, a handle 12 is connected at the other end of the handle transverse plate 11, the handle transverse plate 11 is used for amplifying torque, and the handle 12 is used for rotating the gear 9 by an operator;
the gear 9 is meshed with the locking gear 15, the locking gear 15 is installed on a locking gear copper sleeve 16, the locking gear copper sleeve 16 is installed on a locking shaft 17, the locking shaft 17 is installed in a locking hole 20 in the bottom plate 1, the locking shaft 17 is used for installing the locking gear 15, the locking gear copper sleeve 16 is used for reducing friction force of the locking gear 15, rotation precision of the locking gear 15 is improved, meanwhile, an inner hole of the locking gear 15 is protected from being abraded, the locking gear 15 is used for positioning the locking gear 9 and the inner gear 8, rotation of the star-shaped turntable 7 is avoided, and therefore sliding of the support plate 2 and the sliding block 5 is avoided.
The front end of the supporting plate 2 is an arc surface, the arc radius of the supporting plate 2 is smaller than the radius of the annular part 6, and the supporting plate 2 is ensured to be in line contact with the annular part 6.
The modules of the internal gear 8, the gear 9 and the locking gear 15 are the same, the gears with the same modules can be well meshed, a small meshing gap is formed, and the phenomenon of blocking can be avoided.
The working principle of the invention is as follows:
assembling and debugging the clamp, and rotating the adjusting bolts 4 to enable all the supporting plates 2 to be tightly attached to the sliding blocks 5; loosening the nut on the locking shaft 17 at the upper end of the locking gear 15, and clockwise rotating the handle 12 to ensure that the support plate 2 is all positioned inside the annular part 6 to be clamped; then the ring-shaped part 6 is placed on the bottom plate 1, and the handle 2 is rotated anticlockwise, so that the support plate 2 and the slide block 5 simultaneously slide outwards; firstly, the supporting plate 2 contacting the annular part 6 pushes the annular part 6 to move, and when the handle 12 does not rotate, at least three supporting plates 2 are finally contacted with the annular part 6 according to the three-point centering principle, so that the center of the annular part 6 can be determined; rotating the adjusting bolts 4 to enable all the supporting plates 2 to be tightly attached to the inner wall of the annular part 6, and then pressing the annular part 6 tightly for processing; when the annular part 6 needs to be loosened to release residual stress in the process, firstly, the adjusting bolt 4 is rotated to enable all the supporting plates 2 to be attached to the sliding block 5, then, the nut on the locking shaft 17 at the upper end of the locking gear 15 is loosened, and the handle 12 is rotated clockwise to enable the sliding block 5 and the supporting plates 2 to move towards the center; the ring element 6 is re-clamped.
Claims (4)
1. The utility model provides a large-scale annular thin wall part self-centering anchor clamps, includes bottom plate (1), its characterized in that: a central boss of the bottom plate (1) is connected with a star-shaped turntable (7) through a bearing (14), an internal gear (8) is connected onto the star-shaped turntable (7), a cylindrical boss (25) on a sliding block (5) is fixed in a spiral groove (21) of the star-shaped turntable (7), the sliding block (5) is connected with a supporting plate (2) through an adjusting bolt (4), the supporting plate (2) and the sliding block (5) are installed in a sliding groove (18) of the bottom plate (1) and are fixed on the bottom plate (1) through a pressing plate (3), and an annular part (6) is placed on the bottom plate (1) and is tightly jacked by the supporting plate (2);
the inner gear (8) is meshed with the gear (9), the gear (9) is connected to a rotating shaft (10), the rotating shaft (10) is installed in a copper sleeve fixing hole (19) of the bottom plate (1) through a copper sleeve (13), a handle transverse plate (11) is connected to the end portion of the rotating shaft (10), and a handle (12) is connected to the other end of the handle transverse plate (11);
the gear (9) is meshed with a locking gear (15), the locking gear (15) is installed on a locking shaft (17) through a locking gear copper sleeve (16), and the locking shaft (17) is installed on the bottom plate (1).
2. The automatic centering clamp for the large annular thin-wall part according to claim 1, is characterized in that: the bottom plate (1) on along circumferencial direction equipartition 3 spout (18) more than, all install a backup pad (2) and a slider (5) in every spout (18).
3. The automatic centering clamp for the large annular thin-wall part according to claim 1, is characterized in that: the front end of the support plate (2) is an arc surface, and the arc radius of the support plate (2) is smaller than the radius of the annular part (6).
4. The automatic centering clamp for the large annular thin-wall part according to claim 1, is characterized in that: the modules of the internal gear (8), the gear (9) and the locking gear (15) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911038204.3A CN110695732A (en) | 2019-10-29 | 2019-10-29 | Automatic centering clamp for large annular thin-wall part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911038204.3A CN110695732A (en) | 2019-10-29 | 2019-10-29 | Automatic centering clamp for large annular thin-wall part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110695732A true CN110695732A (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911038204.3A Pending CN110695732A (en) | 2019-10-29 | 2019-10-29 | Automatic centering clamp for large annular thin-wall part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110695732A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084595A (en) * | 2021-03-25 | 2021-07-09 | 北京空间机电研究所 | High-precision ring part plane scraping method |
| CN113977321A (en) * | 2021-11-26 | 2022-01-28 | 河北晶龙阳光设备有限公司 | Milling fixture device |
| CN114559563A (en) * | 2021-12-29 | 2022-05-31 | 杭州大和热磁电子有限公司 | Fixing jig for quartz ring chamfering and using method thereof |
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| CN108928266A (en) * | 2018-09-11 | 2018-12-04 | 长春富维安道拓汽车饰件系统有限公司 | Antichattering system after electric rotating armchair locking |
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| CN110303358A (en) * | 2019-08-06 | 2019-10-08 | 洛阳鹏起实业有限公司 | Vibration damping tooling for processing thin-walled cylinder shape workpiece |
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2019
- 2019-10-29 CN CN201911038204.3A patent/CN110695732A/en active Pending
Patent Citations (13)
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| RO103277B1 (en) * | 1988-12-23 | 1993-03-19 | Institutul Politehnic | Self-centered device with elastic faucet with ribs |
| CN202151702U (en) * | 2011-07-05 | 2012-02-29 | 湖北三江航天险峰电子信息有限公司 | Tool for centring and clamping large-scale rotational part |
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| CN207983196U (en) * | 2018-03-16 | 2018-10-19 | 哈尔滨繁创机械设备有限公司 | A kind of transmission assembly fixture for processing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113084595A (en) * | 2021-03-25 | 2021-07-09 | 北京空间机电研究所 | High-precision ring part plane scraping method |
| CN113084595B (en) * | 2021-03-25 | 2022-07-05 | 北京空间机电研究所 | High-precision ring part plane scraping method |
| CN113977321A (en) * | 2021-11-26 | 2022-01-28 | 河北晶龙阳光设备有限公司 | Milling fixture device |
| CN114559563A (en) * | 2021-12-29 | 2022-05-31 | 杭州大和热磁电子有限公司 | Fixing jig for quartz ring chamfering and using method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |
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| RJ01 | Rejection of invention patent application after publication |