CN219901229U - Self-centering clamp for annular aluminum alloy thin-wall part - Google Patents
Self-centering clamp for annular aluminum alloy thin-wall part Download PDFInfo
- Publication number
- CN219901229U CN219901229U CN202321615887.6U CN202321615887U CN219901229U CN 219901229 U CN219901229 U CN 219901229U CN 202321615887 U CN202321615887 U CN 202321615887U CN 219901229 U CN219901229 U CN 219901229U
- Authority
- CN
- China
- Prior art keywords
- disc
- conical
- aluminum alloy
- wall part
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Jigs For Machine Tools (AREA)
Abstract
The utility model discloses a self-centering clamp for an annular aluminum alloy thin-wall part, wherein one end of a positioning disc is provided with a connecting part, a front supporting disc is coaxially connected with the positioning disc, the outer side of the positioning disc is provided with an L-shaped step along the circumference, one end of a mandrel is coaxially fixed with the positioning disc, the other end of the mandrel is provided with a screw rod part, the middle part of the conical disc is coaxially and slidably connected with the mandrel, the outer surface of the conical disc is coaxially provided with a conical surface, the outer side of a rear supporting disc is circumferentially provided with the L-shaped step, the center of the rear supporting disc is coaxially provided with an inner conical hole, the conical surface of the conical disc can be embedded into the inner conical hole of the rear supporting disc in a fitting way, the screw rod part is connected with a locking nut through threads, and the end surface of the locking nut is abutted against the end surface of one side of the conical disc, which is far away from the front supporting disc. The utility model pushes the conical disc to slide along the mandrel by the lock nut so that the front and rear support discs clamp or loosen the workpiece together, thus being applicable to workpieces with different lengths, and the conical disc and the mandrel are in sliding connection so as to realize self-centering to ensure the clamping precision.
Description
Technical Field
The utility model belongs to the technical field of mechanical clamps, and particularly relates to a self-centering clamp for an annular aluminum alloy thin-wall part, which has the advantages of simple structure, uniform clamping force, high clamping precision and strong adaptability.
Background
With the increasing increase of weight and compactness of mechanical parts, thin-wall parts are increasingly widely applied to various industrial departments due to the characteristics of light weight, compact structure, material saving and the like. Generally, a thin-walled part refers to a workpiece having a ratio of a circular diameter to a wall thickness of 50 to 200. The thin-wall part has poor rigidity and weak strength due to thin wall, so that the thin-wall part is easy to deform in machining, particularly when the requirements on the size and shape and position precision of the thin-wall part are high, if the clamping force, the clamping mode and the like are improper, the thin-wall part is easy to deform and flutter in machining, and the size precision and the shape precision of the thin-wall part are reduced, so that the thin-wall part becomes a great difficulty in machining. Particularly, the thin-wall aluminum alloy part has the characteristics of thin wall and softness, so that the whole rigidity is poor and the strength is weak, and the thin-wall aluminum alloy part is very sensitive to various processing factors, so that the thin-wall aluminum alloy part is easily deformed under the influence of cutting force, clamping force, cutting heat and residual stress in processing.
At present, the outer diameter surface of the thin-wall part is processed by adopting an internal expansion type clamp for clamping, and the reliable clamping of the part under most conditions can be met. However, because the existing internal expansion type clamp is of an integral structure mostly, namely, a plurality of narrow grooves are formed in one side of the elastic expansion sleeve at intervals circumferentially to divide the elastic expansion sleeve into a plurality of leaves, then the leaves are extruded by a conical mandrel to expand outwards to prop against an inner hole of a thin-wall part to realize clamping, but because the front end and the rear end of the expanded leaves of the expansion sleeve have a certain inclination, a certain error is formed between the front end and the rear end of the inner diameter of the expanded part after the expansion of the thin-wall part and the low rigidity part to cause poor concentricity, so that clamping positioning precision is lower, the contact area between the leaves and the inner hole of the thin-wall part is smaller, local stress of the thin-wall part is easily caused to be too large to cause excessive clamping deformation, radial cutting force is difficult to be better handled for supporting the thin-wall part, part deformation is also easily caused, and the expansion amount of the expansion sleeve is limited, so that the size section of the expanded clamping part is narrower, and the clamping part cannot adapt to the processing of thin-wall part with various sizes, and the purchase and maintenance cost is increased.
In the prior art, in order to solve the problems of the internal expansion type clamp, an air pocket or a plurality of air holes are formed in the contact surface of the clamp body and the thin-wall part, an air passage communicated with the air pocket is correspondingly formed in the clamp body, and the thin-wall part is tightly adsorbed on the clamp through a vacuum system, so that the processing quality of the thin-wall part is improved. However, because the air pocket and the air hole of the vacuum adsorption type clamp are required to be tightly attached to the adsorption surface of the thin-wall part to be reliably adsorbed, the vacuum adsorption type clamp is difficult to seal and adsorb the cylindrical surface and the irregular contact surface, and the vacuum adsorption is required to be maintained in the whole process in the processing process of the thin-wall part, so that the processing cost is increased and the reliability of clamping is reduced. In addition, no matter the thin-wall part is an internal expansion type clamp or a vacuum adsorption type clamp in the prior art, the part is fixed on the clamp in the whole processing process, the residual stress and the deformation of the part are not considered, the part is easy to deform after processing due to the release of the residual stress, the deformed part is difficult to meet the higher precision requirement in the field, and therefore the yield of the part is generally lower.
Disclosure of Invention
The utility model aims to provide the self-centering clamp for the annular aluminum alloy thin-wall part, which has the advantages of simple structure, convenience in disassembly and assembly, stability, reliability and good flexibility.
The purpose of the utility model is realized in the following way: including positioning disk, preceding supporting disk, back supporting disk, dabber, toper dish, positioning disk one end is provided with the connecting portion of being connected with processing lathe fixture, preceding supporting disk can dismantle with the positioning disk coaxial and be connected and keep away from the outside of connecting portion along the circumference and be provided with step I of L shape, dabber one end is provided with screw rod portion with the coaxial fixed connection of positioning disk and the other end, the middle part and the coaxial sliding connection of dabber and the coaxial conical surface that is provided with of surface of toper dish, the outside of back supporting disk is provided with step II of L shape and the coaxial interior taper hole that is provided with in center along the circumference of preceding supporting disk, the conical surface of toper dish can laminate imbeds the interior taper hole of back supporting disk, threaded connection has lock nut on the screw rod portion, the terminal surface butt toper dish of lock nut is kept away from the terminal surface of preceding supporting disk one side.
The utility model has the beneficial effects that:
1. the utility model is provided with the lock nut connected with the screw rod part on the mandrel, and the conical disc can be pushed to slide along the mandrel by adjusting the lock nut, so that the front and rear support discs can jointly clamp or loosen the aluminum alloy thin-wall part, the whole structure is simpler and more convenient to clamp, the connecting structure of the screw rod part and the lock nut can adapt to the clamping requirements of thin-wall parts with different lengths, and the utility model is particularly suitable for clamping during cutting processing of middle and small batches of various thin-wall parts.
2. According to the utility model, through the sliding connection of the conical disc and the mandrel and the matching structure of the conical surface of the conical disc and the inner conical hole of the rear supporting disc, the self-centering of the rear supporting disc can be realized to ensure the clamping precision, so that the problem of poor concentricity of the existing internal expanding type clamp can be avoided; moreover, the conical surface of the conical disc and the inner conical hole matching structure of the rear supporting disc only play a role in self-centering and propping, and the L-shaped steps on the front supporting disc and the rear supporting disc are matched, so that reliable axial clamping force can be formed on the thin-wall part, the clamping reliability can be improved, and the problem that the clamping deformation is out of tolerance due to overlarge local stress of the clamping part of the thin-wall part can be avoided.
3. According to the utility model, the elastic circular rings are further fixedly arranged on the step I of the front support disc and/or the step II of the rear support disc, so that the aluminum alloy thin-wall part can be prevented from being scratched by the clamping surface of the support disc, the vibration caused by cutting can be weakened to a certain extent by the elastic structure in a clamping stable state, and the residual stress and the deformation caused by the processing of part of the thin-wall part can be released, thereby further improving the processing precision of the thin-wall part.
4. The utility model further sets a gap washer between the lock nut and the conical disk, and the width of the gap opening of the gap washer is larger than the large diameter of the screw rod part, and the diameter of the lock nut circumscribing circle is smaller than the diameter of the mandrel; the conical disc and the rear supporting disc can be quickly disassembled and assembled through the gap gasket, so that the replacement speed of the thin-wall part can be remarkably improved, and the machining efficiency can be improved.
The utility model has the characteristics of simple structure, uniform clamping force, high clamping precision and strong adaptability.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present utility model;
FIG. 2 is a second schematic diagram of the structure of the present utility model;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic diagram of a split washer according to the present utility model;
in the figure: the device comprises a 1-positioning disc, a 101-connecting part, a 102-guiding boss, a 2-front supporting disc, a 201-step I, a 3-rear supporting disc, a 301-step II, a 302-inner taper hole, a 4-mandrel, a 401-screw part, a 5-taper disc, a 501-taper surface, a 6-locking nut, a 7-elastic circular ring, an 8-compression ring, a 9-connecting bolt, an 11-wear-resistant bushing, a 12-opening washer, a 121-opening, a 13-elastic washer and a 14-aluminum alloy thin-wall part.
Detailed Description
The utility model is further illustrated in the following figures and examples, which are not intended to be limiting in any way, and any alterations or modifications based on the teachings of the utility model are within the scope of the utility model.
As shown in fig. 1 to 4, the utility model comprises a positioning disc 1, a front supporting disc 2, a rear supporting disc 3, a mandrel 4 and a conical disc 5, wherein one end of the positioning disc 1 is provided with a connecting part 101 connected with a clamping mechanism of a processing machine tool, the front supporting disc 2 is coaxially and detachably connected with the positioning disc 1, the outer side far away from the connecting part 101 is circumferentially provided with an L-shaped step I201, one end of the mandrel 4 is coaxially and fixedly connected with the positioning disc 1, the other end of the mandrel 4 is provided with a screw part 401, the middle part of the conical disc 5 is coaxially and slidingly connected with the mandrel 4, the outer surface of the conical disc 5 is coaxially provided with a conical surface 501, the outer side of the rear supporting disc 3 facing the front supporting disc 2 is circumferentially provided with an L-shaped step II 301, the center of the conical surface 501 of the conical disc 5 is coaxially provided with an inner conical hole 302, the conical surface 501 of the conical disc 5 can be embedded into the inner conical hole 302 of the rear supporting disc 3 in a fitting manner, the screw part 401 is in a threaded connection with a locking nut 6, and the end surface of the locking nut 6 abuts against the end surface of the conical disc 5 on one side far away from the front supporting disc 2.
As shown in fig. 2 and 3, the elastic ring 7 is fixedly arranged on the step i 201 of the front support plate 2 and/or the step ii 301 of the rear support plate 3.
The elastic ring 7 is a rubber flat ring or an elastic plastic flat ring of PU (Polyurethane), NBR (nitrile butadiene rubber, nitrile rubber) and PE (polyethylene plastic).
The step I201 of the front support disc 2 and/or the step II 301 of the rear support disc 3 are/is fixedly provided with a pressing ring 8 made of wear-resistant materials, and the outer circular surface of the pressing ring 8 is in sliding fit with the inner hole of the corresponding end surface of the annular aluminum alloy thin-wall part.
The diameter of the maximum end of the outer circular surface of the pressing ring 8 is not smaller than the diameter of the corresponding side of the part; or the outer circular surface of the compression ring 8 is a cylindrical surface with the diameter corresponding to the diameter of the corresponding side of the part, and one side far away from the step flange is provided with a round chamfer or a guide inclined surface.
One end of the positioning disk 1 far away from the connecting part 101 is provided with a guide boss 102 coaxial with the connecting part 101, and the front support disk 2 is coaxially sleeved on the guide boss 102 in a sliding manner and is fixedly connected with the positioning disk 1 through a connecting bolt 9.
The inner conical hole 302 of the rear support disc 3 and/or the conical surface 501 of the conical disc 5 are provided with a wear-resistant coating or are fixed with wear-resistant bushings 11.
The wear-resistant bushing 11 is a copper alloy bushing or a plastic bushing of PPS (polyphenylene sulfide), PA66GF (glass fiber reinforced nylon), PEEK (polyetheretherketone), PAI (imide), PEI (polyetherimide).
As shown in fig. 2, 3 and 4, a gap washer 12 is further sleeved on the screw portion 401 between the lock nut 6 and the conical disc 5, one side of the gap washer 12 is provided with a gap 121 with an opening width larger than the large diameter of the screw portion 401, and the diameter of an external circle of the lock nut 6 is smaller than the diameter of the mandrel 4.
An elastic washer 13 is further sleeved on the screw portion 401 between the lock nut 6 and the opening washer 12, and the outer diameter of the elastic washer 13 is smaller than the diameter of the mandrel 4.
An elastic washer 13 is also sleeved on the screw part 401 between the lock nut 6 and the conical disk 5.
The working process of the utility model is as follows:
as shown in fig. 2, 3 and 4, before working, connecting a connecting part 101 of a positioning disk 1 with clamping mechanisms such as a claw of a processing machine tool, selecting a front supporting disk 2 with a corresponding size according to the inner diameter of a pre-clamping part of an aluminum alloy thin-wall part 14, sliding and sleeving the front supporting disk 2 on a guide boss 102 of the positioning disk 1, and then fixing the front supporting disk 2 with the positioning disk 1 by using a connecting bolt 9; then the back support plate 3 is also selected to be ready for the corresponding size, and the preparation is completed.
During operation, the front end of the aluminum alloy thin-wall part 14 is forced to be pushed into the step I201 of the front support disc 2, then the step II 301 of the rear support disc 3 is extruded into the rear end of the aluminum alloy thin-wall part 14 from the rear end, the conical disc 5 is arranged on the mandrel 4 in a sliding mode, then the rear end of the conical disc 5 is sleeved with the notch gasket 12 on the screw rod portion 401 of the mandrel 4, the locking nut 6 is rotated to enable the conical disc 5 to move along the mandrel 4, the moving conical disc 5 is matched with the inner taper hole 302 through the conical surface 501 to push the rear support disc 3 to move, the elastic ring 7 on the flange edge of the step II 301 is enabled to press the aluminum alloy thin-wall part 14, finally the matched axial direction of the step I201 of the front support disc 2 is abutted against the aluminum alloy thin-wall part 14 to achieve clamping and positioning, and then the aluminum alloy thin-wall part 14 can be cut. After the processing is finished, the disassembly and the replacement can be finished according to the clamping process.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a ring aluminum alloy thin wall part is with self-centering anchor clamps, its characterized in that includes positioning disk (1), preceding supporting disk (2), back supporting disk (3), dabber (4), toper dish (5), positioning disk (1) one end is provided with connecting portion (101) that are connected with the processing lathe fixture, preceding supporting disk (2) can dismantle the outside of being connected and keeping away from connecting portion (101) along the circumference with positioning disk (1) is provided with step I (201) of L shape, dabber (4) one end and coaxial fixed connection of positioning disk (1) and the other end are provided with screw rod portion (401), the middle part and dabber (4) coaxial sliding connection of toper dish (5) and the coaxial conical surface (501) that are provided with of surface, the outside of back supporting disk (3) towards preceding supporting disk (2) is provided with step II (301) of L shape and the coaxial internal taper hole (302) that are provided with in center, conical surface (501) of toper dish (5) can laminate and imbed in internal taper hole (302) of back supporting disk (3), on connecting portion (401) are kept away from screw nut (6) one side of supporting disk (6) and are kept away from screw nut (5).
2. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 1, which is characterized in that an elastic ring (7) is fixedly arranged on a flange of a step I (201) of the front support disc (2) and/or a step II (301) of the rear support disc (3).
3. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 2 is characterized in that a pressing ring (8) made of wear-resistant materials is fixedly arranged on a step surface of a step I (201) of the front supporting disc (2) and/or a step II (301) of the rear supporting disc (3), and the outer circular surface of the pressing ring (8) is in sliding fit with an inner hole of a corresponding end surface of the annular aluminum alloy thin-wall part.
4. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 3, wherein the outer circular surface of the pressing ring (8) is a conical surface with gradually increased inner-outer diameter from the clamping side and a cone angle of 0.5-3.0 DEG, and the maximum end diameter of the outer circular surface of the pressing ring (8) is not smaller than the diameter of the corresponding side of the part; or the outer circular surface of the compression ring (8) is a cylindrical surface with the diameter corresponding to the diameter of the corresponding side of the part, and one side far away from the step flange is provided with a round chamfer or a guide inclined surface.
5. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 2, characterized in that one end of the positioning disk (1) far away from the connecting part (101) is provided with a guide boss (102) coaxial with the connecting part (101), and the front supporting disk (2) is coaxially sleeved on the guide boss (102) in a sliding manner and fixedly connected with the positioning disk (1) through a connecting bolt (9).
6. The self-centering clamp for annular aluminum alloy thin-wall parts according to claim 2, 3, 4 or 5, characterized in that the inner conical hole (302) of the rear supporting disk (3) and/or the conical surface (501) of the conical disk (5) are provided with a wear-resistant coating or are fixed with a wear-resistant lining (11).
7. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 6, characterized in that a gap washer (12) is further sleeved between the lock nut (6) and the conical disc (5) on the screw portion (401), one side of the gap washer (12) is provided with a gap (121) with an opening width larger than the large diameter of the screw portion (401), and the diameter of an external circle of the lock nut (6) is smaller than the diameter of the mandrel (4).
8. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 7, characterized in that an elastic washer (13) is further sleeved between the lock nut (6) and the opening washer (12) on the screw rod part (401), and the outer diameter of the elastic washer (13) is smaller than the diameter of the mandrel (4).
9. The self-centering clamp for the annular aluminum alloy thin-wall part according to claim 5, wherein an elastic washer (13) is further sleeved on the screw rod part (401) between the lock nut (6) and the conical disc (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615887.6U CN219901229U (en) | 2023-06-25 | 2023-06-25 | Self-centering clamp for annular aluminum alloy thin-wall part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615887.6U CN219901229U (en) | 2023-06-25 | 2023-06-25 | Self-centering clamp for annular aluminum alloy thin-wall part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219901229U true CN219901229U (en) | 2023-10-27 |
Family
ID=88426124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321615887.6U Active CN219901229U (en) | 2023-06-25 | 2023-06-25 | Self-centering clamp for annular aluminum alloy thin-wall part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219901229U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118287980A (en) * | 2024-06-06 | 2024-07-05 | 贵州航天控制技术有限公司 | Machining method of thin-wall ring piece and finish machining clamp |
| CN118455802A (en) * | 2024-07-11 | 2024-08-09 | 成都和鸿科技股份有限公司 | Deformation control device and control method for annular thin-wall part machining |
-
2023
- 2023-06-25 CN CN202321615887.6U patent/CN219901229U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118287980A (en) * | 2024-06-06 | 2024-07-05 | 贵州航天控制技术有限公司 | Machining method of thin-wall ring piece and finish machining clamp |
| CN118455802A (en) * | 2024-07-11 | 2024-08-09 | 成都和鸿科技股份有限公司 | Deformation control device and control method for annular thin-wall part machining |
| CN118455802B (en) * | 2024-07-11 | 2024-10-11 | 成都和鸿科技股份有限公司 | Deformation control device and control method for annular thin-wall part machining |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219901229U (en) | Self-centering clamp for annular aluminum alloy thin-wall part | |
| CN204430639U (en) | Self-centering fixture | |
| US20140353929A1 (en) | Expanding arbor | |
| CN109622990A (en) | Control ultra-thin-wall aluminium alloy high-precision ozzle seal groove turning deformation method and fixture | |
| CN206185202U (en) | Supporting sleeve part drill jig | |
| CN113752162A (en) | Centre surrounding clamping type driving clamp | |
| CN106141233B (en) | A kind of clutch hub turning clamp in automatic gearbox | |
| CN105562749B (en) | A kind of automobile-used clamping method of elastic packing gasket ring | |
| CN215318040U (en) | Grinding tool for annular thin-wall sealing element | |
| CN111438384A (en) | Clamping device for turning and decomposing inner ring bushing | |
| KR102742933B1 (en) | Clamping jig for CNC lathe | |
| CN204450016U (en) | A kind of dish cover part family formation turning attachment | |
| CN105537637A (en) | Rapid spring fixture mandrel | |
| CN112007999A (en) | Centering and clamping device for bending and forming flange pipe fitting | |
| CN110539121A (en) | internal-supporting self-centering tool and use method thereof | |
| CN202317788U (en) | Fixture mounting system of hydraulic torque converter sub-assembly rolling process | |
| CN213080713U (en) | Thin wall lining disc class parts machining anchor clamps | |
| CN113523850B (en) | Clamp and clamping method for non-revolving body conical part | |
| CN211304834U (en) | Manual hydraulic expansion turning clamp | |
| CN116276165A (en) | High-precision thin-wall product processing method and equipment | |
| CN222153982U (en) | Pneumatic internal expansion tool for machine tool | |
| CN222696549U (en) | Tensioning clamp for machining aero-engine blades | |
| CN222153963U (en) | Tailstock connection device | |
| CN112757064A (en) | Grinding machine transmission mechanism | |
| CN113798935A (en) | Self-compensation type floating three-jaw power workpiece clamping device of cylindrical grinding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |