CN117921403A - Clamp for machining thin-wall annular workpiece - Google Patents
Clamp for machining thin-wall annular workpiece Download PDFInfo
- Publication number
- CN117921403A CN117921403A CN202311861244.4A CN202311861244A CN117921403A CN 117921403 A CN117921403 A CN 117921403A CN 202311861244 A CN202311861244 A CN 202311861244A CN 117921403 A CN117921403 A CN 117921403A
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- China
- Prior art keywords
- passageway
- thin
- channel
- locating part
- end side
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- Pending
Links
- 238000003754 machining Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 235000014121 butter Nutrition 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Jigs For Machine Tools (AREA)
Abstract
The invention relates to a clamp for machining a thin-wall annular workpiece, which can be matched with a lathe for use. The utility model provides a thin wall annular work piece adds anchor clamps for processing, is including being used for the locating part that establishes with the mutual cover of work piece, locating part circumference outside cover is equipped with the adjusting ring, adjusting ring circumference inner wall with constitute between locating part circumference outer wall and be annular holding the chamber, adjusting ring axial both ends all with the locating part is fixed and sealed, the locating part is equipped with first passageway and the second passageway that is used for with holding the chamber intercommunication, first passageway and holding chamber junction skew second passageway and holding chamber junction, the second passageway is connected with the third passageway that extends along locating part axial, the third passageway runs through the locating part terminal surface, be equipped with sealing member and moving part in the third passageway, moving part screw-thread fit is in the third passageway, the sealing member is located the third passageway depths. The invention has the advantages of realizing high-precision positioning of the thin-wall annular workpiece and being convenient for finish machining.
Description
Technical Field
The invention relates to a clamp for machining a thin-wall annular workpiece, which can be matched with a lathe for use.
Background
In the prior art, a grinding machine is adopted to machine the thin-wall part of the flexible gear, but the grinding machine equipment cost is high.
The chinese patent with application number 201821599137.3 discloses a thin wall flexspline adds clamping apparatus for fix flexspline on the lathe, add clamping apparatus includes frock body, cushion flange, chuck and bolt, and the frock body includes fixing base, supporting seat and connecting seat, and fixing base, supporting seat and connecting seat connect gradually, and the cushion flange is fixed on the supporting seat, and the connecting seat passes the inner ring of cushion flange and outwards extends, and the chuck passes through the bolt fastening on the connecting seat, and the internal surface of chuck matches with the surface of connecting seat, and the chuck is elastic structure.
According to the scheme, the frame body is expanded by tightening the bolts, so that the frame body is expanded on the clamp, but after the clamping head is expanded, the plurality of clamping head elastic parts on the frame body can move outwards in the circumferential direction to be propped against a workpiece, gaps exist between adjacent clamping head elastic parts, the corresponding gaps of the workpiece are not stressed, the manufacturing precision of the workpiece (a thin-wall part of the flexible gear) is higher, the concentricity is required to be 0.008mm, the cylindricity and roundness are required to be 0.015mm-0.02mm, and the machining precision in machining is lower. Meanwhile, the bolt is inclined when moving in a rotating way, so that good coaxiality of the bolt and the chuck is difficult to ensure, and the chuck is not expanded uniformly.
Disclosure of Invention
The invention aims to provide a clamp for processing a thin-wall annular workpiece, which can realize high-precision positioning and clamping.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a thin wall annular work piece adds anchor clamps for processing, is including being used for the locating part that establishes with the mutual cover of work piece, locating part circumference outside cover is equipped with the adjusting ring, adjusting ring circumference inner wall with constitute between locating part circumference outer wall and be annular holding the chamber, adjusting ring axial both ends all with the locating part is fixed and sealed, the locating part is equipped with first passageway and the second passageway that is used for with holding the chamber intercommunication, first passageway and holding chamber junction skew second passageway and holding chamber junction, the second passageway is connected with the third passageway that extends along locating part axial, the third passageway runs through the locating part terminal surface, be equipped with sealing member and moving part in the third passageway, moving part screw-thread fit is in the third passageway, the sealing member is located the third passageway depths.
During the use, fill butter in the locating part through the oil filler point, then seal the oil filler point through the end cap, establish the work piece cover outside the adjusting ring again, rotate the movable part again so that the movable part inwards moves along the third passageway, thereby realize the compression to the butter, the butter that is compressed can be full of and hold the chamber and make the adjusting ring warp, because the chamber that holds in the adjusting ring is annular, the adjusting ring also will expand, and the circularity after expanding is better, each angle all has pressure, can all exert a force to work piece circumference inner wall a week, thereby guarantee the clamping effect, guarantee the high accuracy location of work piece, be convenient for follow-up finish machining to thin wall annular work piece.
Preferably, a groove is formed in the middle of the inner end face of the sealing element. Through the arrangement, grease can conveniently enter the sealing element, so that pressure can be conveniently concentrated to the center, and the sealing element can be conveniently pushed to retract.
Preferably, the width of the slot gradually increases from the outer end side of the third channel to the inner end side of the third channel. Through the arrangement, grease can enter the sealing element more conveniently, so that pressure is concentrated to the center, and the sealing element is pushed to retract conveniently.
Preferably, the sealing element comprises a first sealing element section and a second sealing element section along the axial direction, the outer diameter of the first sealing element section gradually increases from the outer end side of the third channel to the inner end side of the third channel, the outer diameter of the second sealing element section gradually decreases from the outer end side of the third channel to the inner end side of the third channel, and the large outer diameter of the second sealing element section is connected with the large outer diameter of the first sealing element section. By the arrangement, the sealing between the sealing element and the third through groove is realized, and the sealing element is convenient to push.
Preferably, the outer diameter of the portion of the seal member having the groove gradually increases from the outer end side of the third passage to the inner end side of the third passage. By the arrangement, the sealing between the sealing element and the third through groove is realized, and the sealing element is convenient to push.
Preferably, the movable part comprises a thick section and a thin section from the outer end side of the third channel to the inner end side of the third channel in sequence, the third channel forms a step groove structure and is provided with a limiting surface for limiting the movable part to continue to go deep, and the circumferential outer wall of the thick section is provided with an external thread structure. Through setting up thick section and step groove structure to avoid the moving part excessively to go deep, avoid the adjusting ring to be propped bad.
Preferably, the outer end face of the movable piece is provided with a matching groove with a regular polygon cross section. Through setting up the cooperation groove to in order to cooperate with tools such as spanner, thereby realize the rotation and the axial displacement of movable part.
Preferably, a limiting piece is fixed at the outer end of the third channel, the limiting piece is provided with a hollow through groove, and the width of the through groove is smaller than that of the movable piece. The limiting piece is arranged to prevent the movable piece from falling off. Wherein, the limiting piece can be made of elastic materials.
Preferably, the two axial ends of the positioning part are respectively provided with a positioning surface, the two axial ends of the adjusting ring are respectively provided with an inner convex ring extending towards the inner side in the circumferential direction, and the axial surfaces of the two inner convex rings are respectively in contact positioning with the positioning surfaces. The inner convex ring is arranged to be in contact with the positioning surface of the positioning part, so that the positioning of the positioning part and the adjusting ring is facilitated, and the cold welding between the two ends of the positioning part and the adjusting ring is facilitated.
Preferably, a spacer is arranged between the movable piece and the sealing piece. The movable piece is prevented from being directly contacted with the sealing piece by the spacer, so that the sealing piece is prevented from being damaged, the area of the contact surface with the sealing piece can be ensured by the spacer, and the stable pushing of the sealing piece is realized.
The invention has the advantages of realizing high-precision positioning of the thin-wall annular workpiece and being convenient for finish machining.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is a cross-sectional view of the seal of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific embodiments.
As shown in fig. 1, this embodiment discloses a fixture for processing thin-wall annular workpieces, including being used for the locating part 1 that establishes with the work piece each other, locating part 1 circumference outside cover is equipped with adjusting ring 2, forms between adjusting ring 2 circumference inner wall and locating part 1 circumference outer wall and is the annular chamber 20 that holds of cross-section, and adjusting ring 2 circumference inner wall middle part is equipped with the isolation part 21 that extends to circumference inboard, and isolation part 21 circumference inner wall is close to locating part 1 circumference outer wall to make the radial dimension who holds chamber 20 axial both sides bigger. The distance between the circumference Xiang Nabi of the isolation part 21 and the circumferential outer wall of the positioning part 1 is slightly larger than the wall thickness of the workpiece and is within twice the wall thickness of the workpiece; the wall thickness of the adjusting ring 2 at the offset end and the spacer 21 is slightly larger than the wall thickness of the workpiece and is within twice the wall thickness of the workpiece, i.e. the wall thickness of the workpiece is a, and the wall thickness of the adjusting ring 2 at the offset end and the spacer 21 is at least a and at most 2a.
Wherein, adjusting ring 2 axial both ends all pass through cold welding fixed and sealing treatment with location portion 1, and location portion 1 axial both ends all constitute and have the locating surface, and adjusting ring 2 axial both ends all are equipped with the interior bulge loop 22 that extends to circumference inboard, and the axial face of two interior bulge loops 22 contacts the location with a locating surface respectively, and location portion 1 and interior bulge loop 22 junction welding, and constitute and be used for being convenient for welded V-arrangement groove. Wherein, the front end of the positioning portion 1 is provided with a first convex portion 18 protruding upwards, the rear end of the positioning portion 1 is provided with a second convex portion 19 protruding outwards in the circumferential direction, the outer edges of the first convex portion 18 and the second convex portion 19 are circular, and a step structure is formed between the first convex portion 18, the second convex portion 19 and the positioning portion 1 to form an axial positioning surface and a circumferential positioning surface.
The positioning part 1 is provided with a first channel 11 and a second channel 12 which are used for communicating with the accommodating cavity 20, the connection part of the first channel 11 and the accommodating cavity 20 deviates from the connection part of the second channel 12 and the accommodating cavity 20, and the first channel 11 and the second channel 12 extend along the radial direction of the positioning part 1. The positioning part 1 is also provided with a third channel 13 connected with the second channel 12 and extending along the axial direction of the positioning part 1, and a fourth channel 14 connected with the first channel and extending along the axial direction of the positioning part, one end of the fourth channel 14 far away from the accommodating cavity is matched with a plug, and the third channel 13 is coaxial with the positioning part 1.
The third channel 13 runs through the end face of the positioning part 1, a sealing element 3, a spacer 4 and a movable element 5 are arranged in the third channel 13, the movable element 5 is in threaded fit in the third channel 13, the sealing element 3 is positioned in the depth of the third channel 13, and the spacer 4 is positioned between the sealing element 3 and the movable element 5.
As shown in fig. 1 and 2, a groove 31 is formed in the middle of the inner end surface of the seal member 3, and the inner diameter of the groove 31 gradually increases from the outer end side of the third passage to the inner end side of the third passage. The sealing element 3 comprises a first sealing element section 301 and a second sealing element section 302 along the axial direction, the outer diameter of the first sealing element section 301 gradually increases from the outer end side of the third channel to the inner end side of the third channel, the outer diameter of the second sealing element section 302 gradually decreases from the outer end side of the third channel to the inner end side of the third channel, and the large outer diameter of the second sealing element section 302 is connected with the large outer diameter of the first sealing element section 301 through an equal diameter section 303. Wherein the outer diameter of the portion 304 of the seal member 3 having the groove 31 gradually increases from the outer end side of the third passage to the inner end side of the third passage.
As shown in fig. 1, the movable member 5 sequentially comprises a thick section 51 and a thin section 52 from the outer end side of the third channel to the inner end side of the third channel, the third channel 13 forms a step groove structure and is provided with a limiting surface 131 for limiting the movable member to go deep, and the circumferential outer wall of the thick section 51 is provided with an external thread structure for the threaded fit of the movable member. Wherein, the outer end face of the movable piece 5 is provided with a matching groove 53 with a regular polygon cross section. The outer end of the third channel 13 is provided with an annular fixed groove 132, a limiting piece (not shown in the figure) is fixed at the annular fixed groove 132, the limiting piece is provided with a hollow through groove, and the inner diameter of the through groove is smaller than the outer diameter of the thick section 51 of the movable piece.
During the use, keep away from the oil filler point department that holds the chamber through the fourth passageway and fill butter in the location portion, then seal the oil filler point through the end cap, establish thin wall work piece cover outside the adjusting ring again, pass spacing piece with the spanner tip and stretch into in the third passageway, rotate the movable part so that the movable part inwards moves along the third passageway to realize the compression to the butter, the butter of being compressed can be full of and hold the chamber and make the adjusting ring inflation, in order to carry out the clamping to the work piece.
Claims (10)
1. The utility model provides a thin wall annular work piece adds clamping apparatus, includes the location portion that is used for mutually overlapping with the work piece, its characterized in that: the locating part circumference outside cover is equipped with the adjusting ring, adjusting ring circumference inner wall with constitute between the locating part circumference outer wall and be annular holding chamber of cross-section, adjusting ring axial both ends all with the locating part is fixed and sealed the processing, the locating part is equipped with first passageway and the second passageway that is used for with holding the chamber intercommunication, first passageway and holding chamber junction skew second passageway and holding chamber junction, the second passageway is connected with along locating part axial extension's third passageway, the third passageway runs through locating part terminal surface, be equipped with sealing member and moving part in the third passageway, moving part screw-thread fit is in the third passageway, the sealing member is located the third passageway depths.
2. The fixture for machining a thin-walled annular workpiece according to claim 1, wherein: and a slot is formed in the middle of the inner side end surface of the sealing piece.
3. The fixture for machining a thin-walled annular workpiece according to claim 2, wherein: the width of the slot gradually increases from the outer end side of the third channel to the inner end side of the third channel.
4. A thin-walled annular workpiece machining jig according to claim 1 or 2 or 3, wherein: the sealing element comprises a first sealing element section and a second sealing element section along the axial direction, the outer diameter of the first sealing element section gradually increases from the outer end side of the third channel to the inner end side of the third channel, the outer diameter of the second sealing element section gradually reduces from the outer end side of the third channel to the inner end side of the third channel, and the large outer diameter of the second sealing element section is connected with the large outer diameter of the first sealing element section.
5. A thin-walled annular workpiece machining jig according to claim 2 or 3, wherein: the outer diameter of the portion of the seal member having the groove gradually increases from the outer end side of the third passage to the inner end side of the third passage.
6. A thin-walled annular workpiece machining jig according to claim 1 or 2 or 3, wherein: the movable piece comprises a thick section and a thin section from the outer end side of the third channel to the inner end side of the third channel in sequence, the third channel forms a step groove structure and is provided with a limiting surface for limiting the movable piece to continue to go deep, and the circumferential outer wall of the thick section is provided with an external thread structure.
7. A thin-walled annular workpiece machining jig according to claim 1 or 2 or 3, wherein: the outer end face of the movable piece is provided with a matching groove with a regular polygon cross section.
8. The fixture for machining a thin-walled annular workpiece according to claim 7, wherein: the outer end of the third channel is fixedly provided with a limiting plate, the limiting plate is provided with a hollow through groove, and the width of the through groove is smaller than that of the movable piece.
9. A thin-walled annular workpiece machining jig according to claim 1 or 2 or 3, wherein: the axial two ends of the positioning part are respectively provided with a positioning surface, the axial two ends of the adjusting ring are respectively provided with an inner convex ring extending towards the inner side of the circumference, and the axial surfaces of the two inner convex rings are respectively contacted and positioned with the positioning surfaces.
10. A thin-walled annular workpiece machining jig according to claim 1 or 2 or 3, wherein: and a spacer block is arranged between the movable piece and the sealing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311861244.4A CN117921403A (en) | 2023-12-31 | 2023-12-31 | Clamp for machining thin-wall annular workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311861244.4A CN117921403A (en) | 2023-12-31 | 2023-12-31 | Clamp for machining thin-wall annular workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117921403A true CN117921403A (en) | 2024-04-26 |
Family
ID=90750104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311861244.4A Pending CN117921403A (en) | 2023-12-31 | 2023-12-31 | Clamp for machining thin-wall annular workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117921403A (en) |
-
2023
- 2023-12-31 CN CN202311861244.4A patent/CN117921403A/en active Pending
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