CN109623443B - Clamp suitable for mirror-image milling of curved-surface thin-plate parts - Google Patents
Clamp suitable for mirror-image milling of curved-surface thin-plate parts Download PDFInfo
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- CN109623443B CN109623443B CN201910068893.6A CN201910068893A CN109623443B CN 109623443 B CN109623443 B CN 109623443B CN 201910068893 A CN201910068893 A CN 201910068893A CN 109623443 B CN109623443 B CN 109623443B
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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
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Abstract
The invention discloses a clamp suitable for mirror-image milling of curved-surface sheet parts, which comprises a base, a positioning bottom plate, a bottom positioning block, an upright post, an upper clamping mechanism, a middle clamping mechanism and a lower clamping mechanism, wherein the upper clamping mechanism is arranged on the base; the upright post is fixed in the base through the positioning bottom plate so as to restrict the upright post to move along the axis direction; the bottom positioning block is connected to the outer side of the lower part of the upright column and used for restricting the upright column to rotate around the axis; the upper clamping mechanism, the middle clamping mechanism and the lower clamping mechanism are respectively connected to the upper part, the middle part and the lower part of the upright post, can slide along the upright post and are used for clamping the boundary position of the curved-surface sheet part. The invention has relatively small overall dimension, can be flexibly arranged to adapt to thin plates with different dimensions and curvatures on the premise of not damaging the thin plates, has large reserved spaces at the front side and the rear side, is particularly suitable for mirror-image milling of curved surface thin plate parts, and solves the problems of difficult processing, difficult assembly precision guarantee, high positioning difficulty and the like of the existing curved surface thin plate parts.
Description
Technical Field
The invention relates to a clamp, in particular to a clamp suitable for mirror-image milling of curved-surface thin-plate parts, which provides a clamping function for the curved-surface thin-plate parts and facilitates milling of the curved-surface thin-plate parts.
Background
In the processing and manufacturing of large aerospace parts, many parts belong to large-scale aluminum alloy complex thin-wall structural parts, the thickness is far smaller than the length and width, the material cutting rate of the thin-wall integral structural part is up to more than 90%, the average thickness is 8-4 mm, and the thickness of a local area is smaller than 2 mm. Because the thin-wall part has poor rigidity and weak strength, the thin-wall part is extremely easy to deform in processing, the processing difficulty is higher, the processing quality of the part is difficult to ensure, a mirror milling processing procedure is carried out, the whole surface is a surface to be processed, and a common clamp is inconvenient to clamp and easy to interfere with a milling cutter.
A large number of curved sheet parts exist in the fields of airplanes, spacecrafts, ships and the like, and different special clamps are usually adopted due to different shapes and different processing environments of the parts; meanwhile, the surface of the curved surface thin plate type part is complex and is difficult to accurately express by adopting a mathematical expression, so that the curved surface thin plate type part is difficult to process, the assembly precision is difficult to guarantee, and the positioning difficulty is high. For this reason, there is a need for a fixture that effectively positions and secures a curved plate-like member.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a clamp suitable for mirror-image milling of curved-surface thin-plate parts.
The technical scheme adopted by the invention is as follows: a clamp suitable for mirror-image milling of curved-surface thin-plate parts comprises a base, a positioning bottom plate, a bottom positioning block, an upright post, an upper clamping mechanism, a middle clamping mechanism and a lower clamping mechanism; the upright post is fixed in the base through the positioning bottom plate so as to restrict the upright post to move along the axis direction; the bottom positioning block is connected to the outer side of the lower part of the upright column and used for restricting the upright column to rotate around the axis; the upper clamping mechanism, the middle clamping mechanism and the lower clamping mechanism are respectively connected to the upper part, the middle part and the lower part of the upright post, can slide along the upright post and are used for clamping the boundary position of the curved-surface sheet part.
Furthermore, a rotating hole is formed in the base, a shaft sleeve is arranged at the edge position of the rotating hole, the inner side of the shaft sleeve is of a smooth arc-shaped structure, and the outer side of the lower portion of the stand column is arranged opposite to the bottom positioning block, so that the stand column can rotate along the inner side of the shaft sleeve.
Furthermore, a groove and a mounting screw hole which are fixedly connected with the universal machine tool machining platform are formed in the base.
Furthermore, the upright column is divided into an upper part and a lower part, the upper part is of a hexagonal structure and is provided with a square tooth socket along the tangential direction, and the lower part is of a cylindrical structure and is provided with a tooth socket along the axial direction; the bottom of the upright post is provided with a screw hole for fixing a first screw, and the positioning bottom plate is fixedly connected with the upright post through the first screw.
Furthermore, the inner side of the bottom positioning block is of a circular arc structure and is provided with fixed teeth corresponding to tooth grooves in the axial direction at the lower part of the upright post, and the bottom positioning block is fastened with a shaft sleeve on the base through a second screw after the upright post rotates to a required position so as to limit the rotation of the upright post.
Furthermore, the upper clamping mechanism, the middle clamping mechanism and the lower clamping mechanism respectively comprise a connecting piece connected to the upright post and a clamping piece used for clamping curved sheet parts; the inner ring of the connecting piece is of a hexagonal structure matched with the upper part of the upright post and can slide on the upper part of the upright post; the clamping piece comprises two clamping piece bodies, and the two clamping piece bodies are arranged oppositely.
The movable positioning sliding blocks are arranged on two sides of the connecting piece, square teeth corresponding to the square tooth grooves in the upper portion of the stand column are arranged on the inner sides of the positioning sliding blocks, third screws are arranged on the outer sides of the positioning sliding blocks, and after the upper clamping mechanism, the middle clamping mechanism or the lower clamping mechanism slide to a required position, the third screws are screwed to fix the upper clamping mechanism, the middle clamping mechanism or the lower clamping mechanism at any position on the upper portion of the stand column.
The upper edge of the clamping piece of the upper clamping mechanism is provided with a bent flange; and a bent flange is arranged below the clamping piece of the lower clamping mechanism.
Movable gaskets are arranged on the inner sides of the two clamping piece bodies of the clamping piece, and a clamping groove is formed between the two movable gaskets; and the outer sides of the movable gaskets are provided with fourth screws, and the curved surface thin plate parts are screwed tightly after being clamped into the clamping grooves.
And one side of the movable gasket, which is in contact with the curved sheet part, is made of soft rubber.
The invention has the beneficial effects that:
the arrangement of the clamping mechanisms (the upper clamping mechanism, the middle clamping mechanism and the lower clamping mechanism) corresponds to the boundary of the curved sheet type part, the contact surface of the clamping mechanisms and the sheet type part is made of soft rubber, the clamping mechanisms can adapt to the curved profile of the curved sheet type part to a certain degree, and meanwhile, the whole sheet area can be clamped without punching on the sheet. Damage to the sheet can be avoided.
The upright post and the clamping mechanism are connected by a moving pair and are provided with positioning slide blocks, and the position of the clamping mechanism and the position of the base are randomly adjusted to fix the boundary of the thin plates with different sizes, so that the device has high applicability.
The stand is connected and has the bottom locating piece for the revolute pair with the base, to the curved surface sheet metal class part of different curvatures, after the base is fixed, can rotate whole stand and look for the best angle of centre gripping curved surface sheet metal class part, and whole mechanism also can be used to the centre gripping of ordinary plane sheet metal. The whole mechanism has better universality.
The upright post can be lengthened or shortened according to the requirement, meanwhile, the clamping mechanisms on the upright post can be increased or decreased in pairs, and the whole mechanism can be used as a standardized tooling clamp.
The overall dimension of the whole clamp is relatively small, the clamp can be flexibly arranged to adapt to the dimension of a thin plate, the reserved spaces on the front side and the rear side are large, and the clamp is particularly suitable for mirror-image milling of curved-surface thin-plate parts.
Drawings
FIG. 1: the clamp structure of the invention is schematic;
FIG. 2: the clamp is adopted to clamp the curved sheet part;
FIG. 3: the invention discloses an assembly schematic diagram of a stand column and a base;
FIG. 4: the invention discloses an assembly schematic diagram of a clamping mechanism and an upright post.
The attached drawings are marked as follows: 1. a base; 2. positioning the bottom plate; 3. a bottom positioning block; 4. a column; 5. a lower clamping mechanism; 6. a middle clamping mechanism; 7. an upper clamping mechanism; 8. a removable shim; 9. a first screw; 10. a second screw; 11. a third screw; 12. a fourth screw; 13. positioning the sliding block; 14. curved sheet type parts.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 4, a fixture suitable for mirror-image milling of curved-surface thin-plate parts comprises a base 1, a positioning bottom plate 2, a bottom positioning block 3, a column 4, an upper clamping mechanism 7, a middle clamping mechanism 6, a lower clamping mechanism 5, a movable gasket 8, a positioning slider 13, a screw and the like. The positioning bottom plate 2 can restrict the movement of the upright post 4 along the axial direction, the bottom positioning block 3 can restrict the rotation of the upright post 4 around the axial direction, and the lower clamping mechanism 5, the middle clamping mechanism 6 and the upper clamping mechanism 7 can clamp the boundary position of the curved sheet part 14 and can slide along the upright post 4. The entire clamp needs to be used in pairs.
The base 1 is used as a clamp base body, the lower surface of the base is provided with 3 coplanar positioning planes (namely grooves), the base is subjected to finish machining, the base can be placed on a machining platform of a machine tool, six mounting screw holes are reserved, and screws can be additionally arranged to fixedly connect the base with the machining platform of the universal machine tool. The base 1 is internally provided with a rotating hole, the edge position of the rotating hole is provided with a shaft sleeve, the inner side of the shaft sleeve is of a smooth arc-shaped structure and is arranged on the outer side of the lower part of the upright post 4 and opposite to the bottom positioning block 3, so that the upright post 4 can rotate along the inner side of the shaft sleeve.
The upright post 4 is a hollow casting and is divided into an upper part and a lower part: the upper part is of a hexagonal structure and is provided with a square tooth socket along the tangential direction, and finish machining is carried out; the lower part is of a cylindrical structure and is provided with tooth grooves along the axial direction, and the lower part is also subjected to finish machining. The lower part of the upright post 4 is inserted into the rotating hole of the base 1, three screw holes for fixing first screws 9 are formed in the bottom of the upright post 4, the positioning bottom plate 2 is fixedly connected with the upright post 4 through the first screws 9, so that the upright post 4 is fixed in the rotating hole of the base 1, and the upright post 4 is in transition fit with the rotating hole of the base 1.
The bottom positioning block 3 is connected to the outer side of the lower portion of the upright post 4 and is arranged opposite to the shaft sleeve. The inner side of the bottom positioning block 3 is of a circular arc structure and is provided with fixing teeth corresponding to tooth grooves in the axial direction at the lower part of the upright post 4, and the bottom positioning block 3 is fastened with a shaft sleeve on the base 1 through a second screw 10 after the upright post 4 rotates to a required position, so that the rotation of the upright post 4 can be limited.
The upper clamping mechanism 7, the middle clamping mechanism 6 and the lower clamping mechanism 5 are respectively connected to the upper part, the middle part and the lower part of the upright post 4 and used for clamping the boundary position of the curved sheet part 14. The upper clamping mechanism 7, the middle clamping mechanism 6 and the lower clamping mechanism 5 comprise connecting pieces used for being connected to the stand column 4 and clamping pieces used for clamping the curved-surface thin-plate parts 14. The inner ring of the connecting piece is of a hexagonal structure matched with the upper part of the upright post 4 and can slide on the upper part of the upright post 4; movable positioning sliding blocks 13 are arranged on two sides of the connecting piece, and square teeth corresponding to the square tooth grooves in the upper portion of the upright post 4 are arranged on the inner sides of the positioning sliding blocks 13 and are used for finish machining; and a third screw 11 is arranged on the outer side of the positioning sliding block 13, and after the upper clamping mechanism 7, the middle clamping mechanism 6 or the lower clamping mechanism 5 slides to a required position, the upper clamping mechanism 7, the middle clamping mechanism 6 or the lower clamping mechanism 5 can be fixed at any position on the upper part of the upright post 4 by screwing the third screw 11.
The clamping piece comprises two clamping piece bodies which are oppositely arranged, movable gaskets 8 are arranged on the inner sides of the two clamping piece bodies, and a clamping groove is formed between the two movable gaskets 8; the outer sides of the two movable gaskets 8 are provided with fourth screws 12, after the curved-surface thin-plate parts 14 are clamped into the clamping grooves, the fourth screws 12 are screwed to enable the two movable gaskets 8 to clamp the curved-surface thin-plate parts 14 from two sides of the curved-surface thin-plate parts 14. One side of the movable gasket 8, which is in contact with the curved-surface thin-plate part 14, is made of soft rubber, and the other side of the movable gasket is made of metal. In addition, the upper edge of the clamping piece of the upper clamping mechanism 7 is provided with a bending flange; and a bent flange is arranged below the clamping piece of the lower clamping mechanism 5. After the curved-surface thin-plate type part 14 is clamped into the clamping groove, the upper part, the lower part, the left part and the right part of the curved-surface thin-plate type part 14 can be positioned, and the curved-surface thin-plate type part 14 can be clamped by screwing the fourth screw 12 on the outer side of the movable gasket 8.
The clamp can clamp and fix the curved surface thin plate type part 14 and accurately position the position of the curved surface thin plate type part; during clamping, the height of the clamping mechanisms (the upper clamping mechanism 7, the middle clamping mechanism 6 and the lower clamping mechanism 5) can be adjusted according to conditions to achieve the purpose of fixing the curved-surface thin-plate parts 14, the operation is convenient, and the height of the curved-surface thin-plate parts is obtained through measurement. The clamped curved thin plate type part 14 can be vertically taken out upwards, the clamp is small in size, the range of covering the curved thin plate type part 14 is small, the contact surface of the clamp and the curved thin plate type part 14 is made of soft rubber, the clamp can adapt to the curved profile of the curved thin plate type part 14 to a certain degree, meanwhile, the whole area can be clamped, and punching connection on a plate is not needed. The damage to the thin plate can be avoided, and the influence on the mirror image milling processing is small. The clamping mechanism and the upright post 4 can rotate according to the curvature of the curved-surface thin-plate part 14, can adapt to thin plates with various curvatures and can clamp flat plates. The upright post 4 can be lengthened or shortened in a customized mode as required, meanwhile, the clamping mechanisms on the upright post can be increased or decreased in pairs, and the whole mechanism can be used as a standardized tooling clamp.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (9)
1. The clamp suitable for mirror-image milling of curved-surface thin plate parts is characterized by comprising a base (1), a positioning bottom plate (2), a bottom positioning block (3), an upright post (4), an upper clamping mechanism (7), a middle clamping mechanism (6) and a lower clamping mechanism (5);
a rotating hole is formed in the base (1), and a shaft sleeve is arranged at the edge of the rotating hole;
the lower part of the upright post (4) is inserted into the rotating hole, and the upright post (4) can rotate along the inner side of the shaft sleeve; the upright post (4) is divided into an upper part and a lower part, the upper part is of a hexagonal structure and is provided with a square tooth socket along the tangential direction;
the positioning bottom plate (2) is connected with the upright post (4) and the base (1) so as to restrict the movement of the upright post (4) along the axial direction;
the bottom positioning block (3) is connected to the outer side of the lower part of the upright post (4), is arranged opposite to the shaft sleeve and is used for restricting the rotation of the upright post (4) around the axis;
the upper clamping mechanism (7), the middle clamping mechanism (6) and the lower clamping mechanism (5) are respectively connected to the upper part, the middle part and the lower part of the upright post (4), can slide along the upright post (4) and are used for clamping the boundary position of the curved sheet part (14); the upper clamping mechanism (7), the middle clamping mechanism (6) and the lower clamping mechanism (5) respectively comprise a connecting piece connected to the upright post (4) and a clamping piece used for clamping curved sheet parts (14); both sides of connecting piece all are provided with movable location slider (13), the inboard of location slider (13) be provided with the square tooth's socket on stand (4) upper portion corresponds square tooth, the outside of location slider (13) is provided with third screw (11) after upper portion fixture (7), middle part fixture (6) or lower part fixture (5) slide to required position, screw third screw (11) will upper portion fixture (7), middle part fixture (6) or lower part fixture (5) are fixed optional position on stand (4) upper portion.
2. The clamp suitable for mirror-image milling of a curved sheet part according to claim 1, wherein the inner side of the shaft sleeve is of a smooth circular arc structure.
3. The clamp suitable for mirror-image milling of the curved-surface sheet part as claimed in claim 1, wherein the base (1) is provided with a groove and a mounting screw hole for fixedly connecting with a general machine tool machining platform.
4. A clamp suitable for mirror-image milling of curved sheet type parts according to claim 1, characterized in that the lower part of the upright column (4) is of a cylindrical structure and is provided with tooth grooves along the axial direction; the bottom of the upright post (4) is provided with a screw hole for fixing a first screw (9), and the positioning bottom plate (2) is fixedly connected with the upright post (4) through the first screw (9).
5. The clamp suitable for mirror-image milling of curved sheet type parts according to claim 1, wherein the inner side of the bottom positioning block (3) is of a circular arc structure and is provided with fixed teeth corresponding to tooth grooves along the axial direction at the lower part of the upright post (4), and the bottom positioning block (3) is fastened with a shaft sleeve on the base (1) through a second screw (10) after the upright post (4) is rotated to a required position so as to limit the rotation of the upright post (4).
6. A jig suitable for mirror-image milling of a curved sheet type part according to claim 1, wherein the inner ring of the connecting member is of a hexagonal structure matched with the upper part of the upright post (4) and can slide on the upper part of the upright post (4).
7. A clamp suitable for mirror-image milling of curved sheet type parts according to claim 1, characterized in that the upper edge of the clamping piece of the upper clamping mechanism (7) is provided with a bending rib; and a bent flange is arranged below the clamping piece of the lower clamping mechanism (5).
8. The clamp suitable for mirror-image milling of a curved sheet part according to claim 1, wherein the clamping member comprises two clamping member bodies, and the two clamping member bodies are arranged oppositely; the inner sides of the two clamping piece bodies of the clamping piece are respectively provided with a movable gasket (8), and a clamping groove is formed between the two movable gaskets (8); and fourth screws (12) are arranged on the outer sides of the two movable gaskets (8), and the curved surface thin plate parts (14) are clamped in the clamping grooves and then screwed tightly by the fourth screws (12).
9. A fixture suitable for mirror milling of a curved sheet like part according to claim 8, characterized in that the movable shim (8) is soft rubber on the side in contact with the curved sheet like part (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068893.6A CN109623443B (en) | 2019-01-24 | 2019-01-24 | Clamp suitable for mirror-image milling of curved-surface thin-plate parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068893.6A CN109623443B (en) | 2019-01-24 | 2019-01-24 | Clamp suitable for mirror-image milling of curved-surface thin-plate parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109623443A CN109623443A (en) | 2019-04-16 |
| CN109623443B true CN109623443B (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910068893.6A Active CN109623443B (en) | 2019-01-24 | 2019-01-24 | Clamp suitable for mirror-image milling of curved-surface thin-plate parts |
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| CN (1) | CN109623443B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116393940B (en) * | 2023-06-05 | 2023-08-25 | 成都迈特航空制造有限公司 | Cam valve machining and manufacturing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0902791D0 (en) * | 2009-02-20 | 2009-04-08 | Rolls Royce Plc | Fixture for securing a thin-walled component |
| CN203371424U (en) * | 2013-07-17 | 2014-01-01 | 柳州柳新汽车冲压件有限公司 | Automobile top plate tool |
| CN203765497U (en) * | 2014-02-17 | 2014-08-13 | 金牌模具（常熟）有限公司 | Clamping device for measuring smoothness of LCD TV back plate |
| CN206795645U (en) * | 2017-04-27 | 2017-12-26 | 深圳市多与少空间展示艺术有限公司 | A kind of fixing device for installing of space curved surface plate |
| CN207344458U (en) * | 2017-10-13 | 2018-05-11 | 福建信息职业技术学院 | A kind of arrangements for automotive doors clamp for machining |
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- 2019-01-24 CN CN201910068893.6A patent/CN109623443B/en active Active
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