CN220575246U - Clamp for turning annular workpiece - Google Patents
Clamp for turning annular workpiece Download PDFInfo
- Publication number
- CN220575246U CN220575246U CN202322089112.6U CN202322089112U CN220575246U CN 220575246 U CN220575246 U CN 220575246U CN 202322089112 U CN202322089112 U CN 202322089112U CN 220575246 U CN220575246 U CN 220575246U
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- China
- Prior art keywords
- inner hole
- wedge
- shaped inner
- center shaft
- shaft
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- 210000000078 claw Anatomy 0.000 claims abstract description 39
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 229910052790 beryllium Inorganic materials 0.000 claims description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model relates to a clamp for turning an annular workpiece, which consists of a central shaft 1, a flat key 2, wedge-shaped inner hole clamping claws 3, a cylindrical spring 4, a pull rod 6, a cushion sleeve 8 and double nuts 9, wherein the wedge-shaped inner hole clamping claws (3) comprise wedge-shaped inner hole clamping claws I (3 a), wedge-shaped inner hole clamping claws II (3 b) and wedge-shaped inner hole clamping claws III (3 c). Meanwhile, when the clamping device is matched and positioned, the clamping device is completely sealed, the positioning precision is high, the clamping device is equivalent to customizing one inner hole soft claw, and the other three wedge-shaped inner hole claws are not only positioning elements but also clamping elements. When the fit clearance between the mandrel fit outer circle and the inner hole of a certain workpiece is smaller, the coaxiality requirement of the inner circle and the large outer circle of the workpiece can be ensured.
Description
Technical Field
The utility model relates to a clamp for turning an annular workpiece, and belongs to the technical field of machining.
Background
The existing annular workpiece is a workpiece with a large inner hole size and a small axial length. And the inner hole of the annular workpiece 5 is a large hole with 9-level precision, and the inner hole and the outer circle of the annular workpiece have coaxiality requirements.
The method is characterized in that the outer circle part and the end face of the annular workpiece are machined in batches by taking the inner hole as a reference, the end face of the mandrel is in contact with the end face of the annular workpiece, one degree of freedom is limited, the mandrel shaft neck is in clearance fit with the annular inner hole, 4 degrees of freedom are limited, 5 degrees of freedom are limited in total, incomplete positioning is achieved, the coaxiality requirement of the inner circle and the outer circle of the annular workpiece cannot be well guaranteed, and when the fit clearance between the outer circle of the mandrel and the inner hole of a certain workpiece is large, the coaxiality requirement of the inner circle and the large outer circle of the workpiece cannot be guaranteed, and waste products appear.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a clamp for turning an annular workpiece, which is used for positioning and clamping the annular workpiece from an inner hole surface, wherein the positioning excircle of the clamp is completely sealed with the inner circle of the workpiece, and the positioning precision is high without additional clamping elements.
A clamp for turning an annular workpiece is characterized in that the outer circle of a mandrel is in clearance fit with an inner hole of the workpiece. Because the inner hole size of the annular workpiece is large, if the inner hole size is phi 400H9, the tolerance of the inner circle is 0.14mm, and if the tolerance of the mandrel matched with the outer circle is only 0.01mm, the maximum fit clearance between the mandrel matched with the outer circle and the inner hole of the workpiece is 0.15mm, and the minimum fit clearance is 0.01mm. Therefore, when the fit clearance between the mandrel fit outer circle and the inner hole of a certain workpiece is smaller, the coaxiality requirement of the inner circle and the large outer circle of the workpiece can be ensured.
The technical scheme of the utility model is as follows: the utility model comprises a center shaft 1, a flat key 2, a wedge-shaped inner hole claw 3 and a wedge-shaped inner hole claw 3, wherein the wedge-shaped inner hole claw 3 comprises a wedge-shaped inner hole claw I (3 a), a wedge-shaped inner hole claw II (3 b), a wedge-shaped inner hole claw III (3 c), a cylindrical spring 4, a pull rod 6, a cushion sleeve 8 and a double nut 9.
The right end conical surface of the center shaft 1 is provided with a center shaft chute 11 (3, the circumferences of the center shaft chute are uniformly distributed on the right end conical surface of the center shaft), the wedge-shaped inner hole clamping jaw 3 is placed on the center shaft chute 11, the inner conical surface of the wedge-shaped inner hole clamping jaw 3 is contacted with the conical surface of the center shaft chute 11, the conical degree of the inner conical surface of the wedge-shaped inner hole clamping jaw 3 is the same as the conical degree of the center shaft chute 11, and the wedge-shaped inner hole clamping jaw 3 can be spread by the center shaft chute 11 when moving leftwards until the outer circular radius of the wedge-shaped inner hole clamping jaw 3 is equal to the maximum practical radius of the inner hole of the annular workpiece 5. The wedge-shaped inner hole jaw one (3 a) is provided with a key slot 31 for mounting the flat key 2.
The cylindrical spring 4 is sleeved on the cylindrical surface of the central shaft 1, the wedge-shaped inner hole clamping jaw 3 is simultaneously pressed on the end surface of the cylindrical spring 4, and the other end surface of the cylindrical spring 4 is pressed on the central shaft 1.
The center shaft 1 is provided with a center shaft through hole 12, one end of the pull rod 6 is provided with threads, the end face of the pull rod end 61 is welded with a nut, and the pull rod end nut 62 of the pull rod 6 is drilled with a center hole 63. The threaded end of the tie rod 6 passes through the central shaft opening 12 and the tie rod head 61 simultaneously bears against the end face of the wedge-shaped inner bore jaw 3.
The middle shaft 1 is provided with a middle shaft cushion concave table 14, the cushion sleeve 8 passes through the threaded end of the pull rod and is placed on the middle shaft cushion concave table 14, the double nut 9 and the middle shaft threads are mutually screwed, the pull rod end nut 62 is fixed to screw the double nut 9, the double nut 9 is contacted with the end surface of the cushion sleeve 8, the double nut 9 is continuously screwed, the pull rod 6 moves leftwards, the pull rod end 61 also moves leftwards, and the wedge-shaped inner hole clamping jaw 3 is pushed to move leftwards. The wedge-shaped inner hole claw 3 is spread by the central shaft chute 11 when moving leftwards until the outer circle radius of the wedge-shaped inner hole claw 3 is equal to the maximum actual radius of the inner hole of the annular workpiece, namely, the outer circle radius of the wedge-shaped inner hole claw 3 is equal to the maximum value of the inner hole radius tolerance zone of the annular workpiece 5.
The center shaft 1 is provided with the counter bores 13, 3 circumferences are uniformly distributed on the center shaft 1, and the counter bores 13 and the center shaft concave table 15 are convenient for installing the clamp on the main shaft.
The beneficial effects are that:
1. the utility model relates to a clamp for positioning and clamping an annular workpiece from an inner hole surface, wherein the positioning outer circle of the clamp is completely sealed with the inner circle of the workpiece, the contact surface between the clamp and the inner circle of the workpiece is larger, the positioning accuracy is high, and no additional clamping element is needed.
2. The utility model can be matched and positioned simultaneously, which is not only completely sealed and has high positioning precision, but also is equivalent to customizing an inner hole soft claw.
Drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is a cross-sectional view of the present utility model.
FIG. 3 is a schematic diagram of the present utility model.
Fig. 4 is a perspective view of the central axis of the present utility model.
Fig. 5 is a perspective view of the central axis of the present utility model.
Fig. 6 is a perspective view of a wedge-shaped inner hole jaw of the present utility model.
Fig. 7 is a perspective view of the tie rod of the present utility model.
Fig. 8 is a perspective view of the tie rod of the present utility model.
Fig. 9 is a schematic view of a workpiece to be machined.
Fig. 10 is a perspective view of the present utility model.
Identification description: the device comprises a central shaft 1, a flat key 2, a wedge-shaped inner hole clamping jaw 3, a wedge-shaped inner hole clamping jaw I (3 a), a wedge-shaped inner hole clamping jaw II (3 b), a wedge-shaped inner hole clamping jaw III (3 c), a cylindrical spring 4, an annular workpiece 5, a pull rod 6, a tailstock center 7, a cushion sleeve 8, a double nut 9, a central shaft chute 11, a central shaft through hole 12, a counter bore 13, a central shaft cushion sleeve concave table 14, a central shaft concave table 15, a wedge-shaped inner hole clamping jaw key groove 31, a pull rod end 61, a pull rod end nut 62, a central shaft 63, an end concave table 64 and an annular workpiece inner hole key groove 51.
Detailed Description
The utility model is described in further detail below with reference to the drawings.
Positioning of the clamp for turning the annular workpiece as shown in fig. 1 to 10, the clamp positioning wedge-shaped inner hole jaws 3 made of 3 pieces of beryllium bronze material are in contact with the inner hole of the annular workpiece 5, limiting five degrees of freedom, namely 3 translational degrees of freedom of the annular workpiece 5 relative to the clamp X, Y, Z shaft and two other rotational degrees of freedom except for rotation about the axis of the central shaft 1; the flat key 2 restricts one degree of freedom, that is, the degree of freedom in rotation of the ring-shaped workpiece 5 about the axis of the center shaft 1, and six degrees of freedom in total (translation along the x-axis, translation along the Y-axis, translation along the Z-axis, rotation about the x-axis, rotation about the Y-axis, rotation about the Z-axis), so that the ring-shaped workpiece 5 and the jig are fully positioned. The outer circle radius of the wedge-shaped inner hole claw 3 is equal to the maximum actual radius of the inner hole of the annular workpiece 5, namely, the outer circle radius of the wedge-shaped inner hole claw 3 is equal to the maximum value of the inner hole radius tolerance zone of the annular workpiece 5, and the wedge-shaped inner hole claw is completely sealed and has high positioning precision when being matched and positioned, which is equivalent to customizing one inner hole soft claw.
The clamping of the clamp for turning the annular workpiece is shown in fig. 1-10, the right end of a clamping center shaft 1 of the clamp is conical, three center shaft inclined grooves 11 (3, the circumferences of which are uniformly distributed on the conical surface at the right end of the center shaft) are respectively arranged on the conical surface at the right end of the center shaft 1, a wedge-shaped inner hole claw 3 is arranged on the wedge-shaped inner hole claw I (3 a), a wedge-shaped inner hole claw key groove 31 is arranged on the wedge-shaped inner hole claw I (3 a), a machined annular workpiece inner hole key groove 51 is arranged on the annular workpiece 5 and is matched with the wedge-shaped inner hole claw key groove 31 on the wedge-shaped inner hole claw I (3 a), and the annular workpiece 5 is driven to rotate by a flat key 2.
The spanner is used for fixing the end nut 62 of the pull rod, the first several circles of pull rods 6 are prevented from rotating along with the double nuts 9 when the double nuts 9 are screwed, then the double nuts 9 on the pull rods 6 are screwed, the pull rods 6 are moved leftwards, the end pull rod ends 61 of the pull rods 6 are also moved leftwards to push three wedge-shaped inner hole clamping claws 3 uniformly distributed on the circumference to move leftwards simultaneously, the diameter of the three wedge-shaped inner hole clamping claws 3 is enabled to be equal to the maximum actual radius of the inner hole of the annular workpiece 5 in the leftwards moving process until the outer circle radius of the wedge-shaped inner hole clamping claws 3 is enabled to be equal to the maximum value of the inner hole radius tolerance zone of the annular workpiece 5, the annular workpiece 5 is clamped from the inner hole surface of the annular workpiece 5, and the wedge-shaped inner hole clamping claws 3 simultaneously compress the cylindrical spring 4. The wedge-shaped inner hole claw 3 is both a positioning element and a clamping element.
As shown in fig. 3 to 10, the fixture for turning the annular workpiece is specifically used, the inner hole of the annular workpiece 5 is finished, and the inner hole key groove 51 of the annular workpiece 5 is finished, and the outer circle portion and the end face of the annular workpiece 5 are waited for to be machined. The cylindrical spring 4 is sleeved into the center shaft 1, the right end conical part of the center shaft 1 is placed into the inner hole of the annular workpiece 5, the wedge-shaped inner hole clamping jaw I (3 a), the wedge-shaped inner hole clamping jaw II (3 b) and the wedge-shaped inner hole clamping jaw III (3 c) are respectively placed between the inner hole of the annular workpiece 5 and the center shaft chute 11 (3 strips, the circumferences of which are uniformly distributed on the conical surface of the right end of the center shaft 1), the pull rod 6 is inserted into the inner hole of the center shaft 1 from left to right, the threaded part of the pull rod 6 firstly enters, the pull rod 6 is sleeved with the cushion sleeve 8 and the double nut 9, the pull rod end nut 62 is firstly fixed by a spanner, the first several circles of pull rod 6 when the double nut 9 is prevented from being screwed are rotated along with the double nut 9, then the double nut 9 is screwed down, the pull rod 6 moves leftwards, the three wedge-shaped inner hole clamping jaws 3 uniformly distributed circumferentially are simultaneously pushed leftwards by the right end of the pull rod 6, the pull rod end 61 is provided with the end concave table 64 so as not to collide with the center shaft 1 when the workpieces are machined, the diameter of the pull rod end 61 is enabled to be in a conical shape when the right end of the center shaft 1 moves leftwards until the diameter of the inner hole 3 is enabled to be equal to the radius of the diameter of the annular inner hole clamping jaw 5 of the annular workpiece, and the diameter of the inner hole clamping jaw 5 is equal to the radius of the largest, and the diameter of the wedge-shaped inner hole clamping jaw 5 is equal to the diameter of the annular workpiece is actually the inner hole clamping jaw 5, and the diameter is equal to the diameter of the inner hole is the inner hole 3, and the inner hole is the diameter of the inner hole is the inner hole 3. The left flange of the center shaft 1 is fixedly connected with a lathe main shaft through an inner hexagon screw, the fixed connection method is the same as that of a flower disc, and after the fixed connection is finished, the tailstock center 7 is propped against the center hole 63.
And starting the lathe to process the outer circle part and the end face of the annular workpiece 5.
After the machining is finished, the clamp is detached from the lathe spindle, the double nuts 9 are unscrewed, and when the pull rod is loosened, the cylindrical spring 4 springs the wedge-shaped inner hole clamping jaw 3 to open the wedge-shaped inner hole clamping jaw 3, so that the annular workpiece 5 is detached. And then another annular workpiece is sleeved for processing.
While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (5)
1. A clamp for turning an annular workpiece is characterized by comprising a center shaft (1), a flat key (2), wedge-shaped inner hole clamping jaws (3), a cylindrical spring (4), a pull rod (6), a cushion sleeve (8) and a double nut (9), wherein the wedge-shaped inner hole clamping jaws (3) comprise wedge-shaped inner hole clamping jaws I (3 a), wedge-shaped inner hole clamping jaws II (3 b) and wedge-shaped inner hole clamping jaws III (3 c), the right end of the center shaft (1) is conical, three center shaft chute grooves (11) are formed in the conical surface of the right end of the center shaft (1) and are uniformly distributed on the conical surface of the right end of the center shaft (1) in circumference, the wedge-shaped inner hole clamping jaws (3) are placed on the center shaft chute grooves (11), the inner conical surface of the wedge-shaped inner hole claw (3) is contacted with the conical surface of the middle shaft chute (11), the taper of the inner conical surface of the wedge-shaped inner hole claw (3) is the same as the taper of the middle shaft chute (11), the wedge-shaped inner hole claw I (3 a), the wedge-shaped inner hole claw II (3 b) and the wedge-shaped inner hole claw III (3 c) are made of 3 pieces of beryllium bronze materials and are contacted with the inner hole of the annular workpiece (5), five degrees of freedom are limited, namely, 3 translational degrees of freedom of the annular workpiece (5) relative to the clamp X, Y, Z shaft and other two rotational degrees of freedom except for rotation around the axis of the middle shaft (1), the flat key (2) limits one degree of freedom, namely, the rotational degrees of freedom of the annular workpiece (5) around the axis of the middle shaft (1), six degrees of freedom are limited in total, namely translation along an x axis, translation along a Y axis, translation along a Z axis, rotation around the x axis, rotation around the Y axis and rotation around the Z axis, so that the annular workpiece (5) and the clamp are positioned completely, namely an inner hole soft claw is formulated, a key groove (31) is formed in a wedge-shaped inner hole claw (3 a), and a flat key (2) is arranged on the key groove (31).
2. A clamp for turning an annular workpiece according to claim 1, characterized in that the cylindrical spring (4) is sleeved on the cylindrical surface of the central shaft (1), the first wedge-shaped inner hole clamping jaw (3 a), the second wedge-shaped inner hole clamping jaw (3 b) and the third wedge-shaped inner hole clamping jaw (3 c) are simultaneously pressed on the end surface of the cylindrical spring (4), and the other end surface of the cylindrical spring (4) is pressed on the central shaft (1).
3. The clamp for turning annular workpieces according to claim 1, characterized in that the center shaft (1) is provided with a center shaft through hole (12), one end of the pull rod (6) is provided with threads, the end of the pull rod end (61) is welded with a nut, and a center hole (63) is drilled on a pull rod end nut (62) of the pull rod (6).
4. A clamp for turning an annular workpiece according to claim 1, characterized in that the centre shaft (1) is provided with a centre shaft bushing recess (14).
5. The clamp for turning annular workpieces according to claim 1, wherein the center shaft (1) is provided with counter bores (13), the counter bores (13) are uniformly distributed on the center shaft (1) in 3 circumferences, and the counter bores (13) and the center shaft concave table (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322089112.6U CN220575246U (en) | 2023-08-04 | 2023-08-04 | Clamp for turning annular workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322089112.6U CN220575246U (en) | 2023-08-04 | 2023-08-04 | Clamp for turning annular workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220575246U true CN220575246U (en) | 2024-03-12 |
Family
ID=90122916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322089112.6U Active CN220575246U (en) | 2023-08-04 | 2023-08-04 | Clamp for turning annular workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220575246U (en) |
-
2023
- 2023-08-04 CN CN202322089112.6U patent/CN220575246U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |