CN213531699U - Clamping device is used in processing of drum class thin wall spare - Google Patents
Clamping device is used in processing of drum class thin wall spare Download PDFInfo
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- CN213531699U CN213531699U CN202022452660.7U CN202022452660U CN213531699U CN 213531699 U CN213531699 U CN 213531699U CN 202022452660 U CN202022452660 U CN 202022452660U CN 213531699 U CN213531699 U CN 213531699U
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Abstract
The utility model discloses a clamping device for processing a cylindrical thin-wall part, which comprises a chuck and a plurality of movable holding claws arranged on the chuck; after the holding claws are held tightly, the side walls of the adjacent holding claws are contacted, the shape of an inner cavity formed by all the holding claws is matched with the shape of the outer surface of the thin-wall piece to be processed, and the radial dimension of the thin-wall piece to be processed is 0.1-0.2mm smaller than that of the inner cavity. The utility model discloses can guarantee circularity, axiality and the wall thickness of barrel, avoid clamping and turning in-process to take place to warp.
Description
Technical Field
The utility model belongs to the technical field of machining, concretely relates to clamping device is used in processing of drum class thin wall spare.
Background
The thin-wall cylindrical parts occupy a great weight in the fields of aerospace and the like due to the advantages of small net weight, compact structure and the like, and the wall thickness of some thin-wall cylindrical parts is generally between 0.3 and 3mm, and the ratio (D/delta) of the external diameter D to the wall thickness delta is generally 50 to 200. The rigidity is poor, and the deformation is easy to occur in the processing process. Generally, process bosses for clamping are reserved on two end faces of the cylinder so as to avoid deformation of the cylinder body caused by clamping force in the machining process. As shown in fig. 3, a drawing of a part clamping blank of a conventional machining method is shown, and the extra part of the middle outer wall of two process bosses is machined and removed. As can be seen from FIG. 3, obvious process bosses are reserved at two ends of the blank material and are directly clamped on the process bosses during processing. The process boss is arranged outside the part body, so that the length and the outer diameter of the part blank are increased. Because the wall thickness of the part body is thinner, the weight of the added material is higher than that of the part body blank, which wastes the material and increases the processing cost. The process boss is large in thickness and high in strength, the deformation of the part is restrained, the part body cannot deform due to the clamping force, the strength of the process boss is reduced along with the removal of the process boss after machining, and the part deforms due to the release of internal stress. In addition, when the outer surface of the thin-wall part to be processed is not a cylindrical surface, for example, when the outer surface of the thin-wall part is a curve corresponding to the axial section of the thin-wall part, the thin-wall part cannot be clamped by a traditional clamp.
Disclosure of Invention
For solving the problem that exists among the prior art, the utility model aims to provide a clamping device is used in processing of drum class thin wall spare, the utility model discloses can guarantee circularity, axiality and the wall thickness of barrel, avoid clamping and turning in-process to take place to warp.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a clamping device for processing a cylindrical thin-wall part comprises a chuck and a plurality of movable holding claws arranged on the chuck; after the holding claws are held tightly, the side walls of the adjacent holding claws are contacted, the shape of an inner cavity formed by all the holding claws is matched with the shape of the outer surface of the thin-wall piece to be processed, and the radial dimension of the thin-wall piece to be processed is 0.1-0.2mm smaller than that of the inner cavity.
Preferably, the radial inner side and the radial outer side of the holding claw are connected with the chuck through bolts.
Preferably, when the outer wall of the thin-wall part to be processed is provided with a flange and/or a groove, the inner wall of the holding claw is correspondingly provided with an accommodating groove for accommodating the flange and/or a flange structure extending into the groove; after the holding claws hold tightly, the accommodating grooves are tightly attached to the surface of the flange of the outer wall of the thin-wall piece to be processed, and the flange structure is tightly attached to the grooves of the outer wall of the thin-wall piece to be processed.
Preferably, the height-diameter ratio of the holding claw is not less than 1.2.
Preferably, the number of the holding claws is three.
The utility model discloses following beneficial effect has:
in the clamping device for processing the cylindrical thin-wall part, the shape of the inner cavity formed by all the holding claws is matched with the shape of the outer surface of the thin-wall part to be processed, so that when the outer surface of the thin-wall part to be processed is not a cylindrical surface, the inner surface of each holding claw can be in good contact with the outer surface of the thin-wall part, the pressure of each holding claw acting on the thin-wall part is lower, the holding claws can hold the thin-wall part tightly, the inner surface processing (such as internal boring) can be normally carried out, and the holding claws can be prevented from deforming the thin-wall part clamp; in addition, after the plurality of holding claws are held tightly, the side walls of the adjacent holding claws are contacted, so that no gap exists between the holding claws, the clamping force of the holding claws on the thin-wall part can be controlled through the mutual contact between the holding claws and the limiting action between the holding claws, and the clamping deformation of the thin-wall part by the holding claws due to overlarge acting force exerted by hands when the thin-wall part is clamped by the holding claws operated by using a chuck can be prevented; the radial dimension of the thin-wall part to be processed is 0.1-0.2mm smaller than the radial dimension of the inner cavity, and tests show that the clamping claw can stably clamp the thin-wall part under the interference magnitude, the deformation of the thin-wall part can be accepted in the clamping process, and the final product is qualified. The chuck structure can ensure the coaxiality among the holding claw, the chuck and the thin-wall part, and ensure the roundness of the final part.
Further, the inner side and the outer side of each holding claw in the radial direction are connected with the chuck through bolts, and the inner side and the outer side of each holding claw are fixed, so that the coaxiality among the inner surface of each holding claw, the chuck and the thin-wall part can be guaranteed, further, the inner cavity surface formed by all the holding claws is guaranteed to be in comprehensive contact with the surface of the thin-wall part, and the thin-wall part is prevented from deforming (if the radial size close to the fixed end of each holding claw is reduced, the radial size far away from the fixed end of each holding claw is slightly larger.
It is further right, set up on the claw inner wall and hold the recess and/or the flange structure homoenergetic and guarantee to hold the outer wall comprehensive contact of claw inner wall and part, reduce or prevent the deformation of thin wall spare, and then influence the progress of machining dimension.
Drawings
For further explanation of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings:
fig. 1 is a three-dimensional schematic view of the clamping device for processing cylindrical thin-walled workpieces of the present invention;
fig. 2 is a longitudinal sectional view of a single embracing claw according to an embodiment of the present invention.
FIG. 3 is a drawing of a part clamping blank in a conventional machining method.
Wherein: 1-a chuck; 2, holding a claw; 2-1-first bolt hole; 2-2-second bolt hole; 2-3-accommodating the groove; 3-bolt, 4-thin wall piece, 4-1-process boss.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the clamping device for processing the cylindrical thin-walled workpiece of the present invention comprises a chuck 1 and a plurality of movable holding claws 2 mounted on the chuck 1, wherein the chuck 1 can be fixed on a main shaft of a lathe or a working table of a processing center; after the holding claws 2 are held tightly, the side walls of the adjacent holding claws 2 are contacted, the shape of an inner cavity formed by all the holding claws 2 is matched with the shape of the outer surface of a thin-wall part to be processed, and the radial dimension of the thin-wall part to be processed is 0.1-0.2mm smaller than that of the inner cavity.
As a preferred embodiment of the present invention, referring to fig. 1 and 2, the radial inner side and outer side of the holding claw 2 are connected to the chuck 1 by bolts 3.
As a preferred embodiment of the present invention, referring to fig. 2, the inner wall of the holding claw 2 is mainly a cylindrical surface, and when the outer wall of the thin-walled part to be processed has a flange and/or a groove, the inner wall of the holding claw 2 is correspondingly provided with a holding groove 2-3 for holding the flange and/or a flange structure extending into the groove; after the holding claws 2 are held tightly, the accommodating grooves 2-3 are tightly attached to the surface of a flange of the outer wall of the thin-wall part to be processed, and the flange structure is tightly attached to the groove of the outer wall of the thin-wall part to be processed.
As the utility model discloses preferred embodiment, hold claw 2's height-diameter ratio and be not less than 1.2, want to make the thin wall spare can all hold in all the inner chambers of holding claw 2 formation, prevent that the thin wall spare from taking place to warp in the course of processing internal surface.
As the utility model discloses preferred embodiment, it sets up threely to embrace claw 2, and every is embraced claw central angle and is 120 degrees promptly, and is located same circumference, and the three claw central angle sum of embracing equals 360 degrees.
As the utility model discloses preferred embodiment, embrace claw 2 and adopt the aluminum alloy to make, the texture is softer, and the quality is lighter, can not press from both sides and hinder the material surface, easily dismantles and transport.
As the utility model discloses preferred embodiment embraces the inner wall arcwall face size and the height of claw 2 through the adjustment, improves the device's range of application. In addition, the clamping device with various specifications can be designed according to the specific shape of the outer wall of the part, and the clamping device can also be designed into a complex wall surface.
As the utility model discloses preferred embodiment is six point clamping on every periphery of drum part, and the barrel atress is more even.
Examples
As shown in fig. 1 and 2, the clamping device for processing the cylindrical thin-walled part in the embodiment includes a chuck 1, a holding claw 2 and a bolt 3, wherein the holding claw is connected to the chuck through the bolt, in the actual production process, the inner diameter of the holding claw needs to be turned and corrected on a lathe according to the specific shape and size of the cylindrical part, and the diameter of the arc surface of the inner wall of the holding claw is 0.1-0.2mm smaller than the diameter of the outer end surface between the cylindrical parts.
The clamping device is high in height, the shape of the clamping device is close to the outer wall of a part, the whole part is wrapped inside the clamping claw, the contact area of the clamping device is larger than that of a three-jaw chuck, and the deformation of the part is effectively controlled. Fig. 2 is a sectional view of the holding claw, the shape and the size of the inner wall of the holding claw are manufactured according to the outer wall surface of a part, the inner surface of the holding claw can be designed into a groove shape, the whole inner wall surface of the holding claw can be in contact with the outer surface of the part, the contact area is more sufficient during clamping, the clamping is more reliable, and the part is effectively prevented from rotating in the machining process.
In addition, the holding claw is made of aluminum alloy, is soft in texture and light in weight, and can prevent the clamp from damaging the part. According to the internal complexity and the process arrangement of the cylindrical thin-wall part, the holding claw clamped with the part can be selectively fixed on a numerical control lathe spindle or a machining center workbench, so that the turnover of the chuck between the working procedures is facilitated.
The processing of cylindrical thin-wall parts with various specifications proves that the roundness, coaxiality and thickness of the parts meet the requirements of drawings when the parts are clamped by adopting the above mode, and the qualification rate is 100%. Adopt the utility model discloses a thin wall parts machining is carried out to the frock, can effectively reduce the size and the weight of part blank, reduces the machining allowance, practices thrift the processing cost.
The foregoing embodiments and description have been presented only to illustrate the principles of the invention and are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Various non-inventive changes and improvements related to the utility model all belong to the protection scope of the utility model.
Claims (5)
1. A clamping device for processing a cylindrical thin-wall part is characterized by comprising a chuck (1) and a plurality of movable holding claws (2) arranged on the chuck (1); after the plurality of holding claws (2) are held tightly, the side walls of the adjacent holding claws (2) are contacted, the shape of an inner cavity formed by all the holding claws (2) is matched with the shape of the outer surface of a thin-wall part to be processed, and the radial dimension of the thin-wall part to be processed is 0.1-0.2mm smaller than that of the inner cavity.
2. The clamping device for machining the cylindrical thin-walled workpiece according to claim 1, wherein the radial inner side and the radial outer side of the holding claw (2) are connected with the chuck (1) through bolts (3).
3. The clamping device for processing the cylindrical thin-walled workpiece according to claim 1, wherein when the outer wall of the thin-walled workpiece to be processed is provided with a flange and/or a groove, the inner wall of the holding claw (2) is correspondingly provided with an accommodating groove (2-3) for accommodating the flange and/or a flange structure extending into the groove; after the holding claws (2) are held tightly, the accommodating grooves (2-3) are tightly attached to the surface of the flange of the outer wall of the thin-walled part to be processed, and the flange structure is tightly attached to the groove of the outer wall of the thin-walled part to be processed.
4. The clamping device for machining the cylindrical thin-walled workpiece according to claim 1, wherein the height-diameter ratio of the holding claw (2) is not less than 1.2.
5. The clamping device for machining the cylindrical thin-walled workpiece according to claim 1, wherein three holding claws (2) are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022452660.7U CN213531699U (en) | 2020-10-29 | 2020-10-29 | Clamping device is used in processing of drum class thin wall spare |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022452660.7U CN213531699U (en) | 2020-10-29 | 2020-10-29 | Clamping device is used in processing of drum class thin wall spare |
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| Publication Number | Publication Date |
|---|---|
| CN213531699U true CN213531699U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022452660.7U Active CN213531699U (en) | 2020-10-29 | 2020-10-29 | Clamping device is used in processing of drum class thin wall spare |
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| CN (1) | CN213531699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116276230A (en) * | 2023-05-10 | 2023-06-23 | 陕西长羽航空装备股份有限公司 | Equipment for manufacturing three-jaw rotary holding jaw for aviation aircraft |
-
2020
- 2020-10-29 CN CN202022452660.7U patent/CN213531699U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116276230A (en) * | 2023-05-10 | 2023-06-23 | 陕西长羽航空装备股份有限公司 | Equipment for manufacturing three-jaw rotary holding jaw for aviation aircraft |
| CN116276230B (en) * | 2023-05-10 | 2023-08-11 | 陕西长羽航空装备股份有限公司 | Equipment for manufacturing three-jaw rotary holding jaw for aviation aircraft |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710000 No.8, Jingyuan 7th Road, Jinghe Industrial Park, Gaoling District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Changyu Aviation Equipment Co.,Ltd. Address before: 710000 No.8, Jingyuan 7th Road, Jinghe Industrial Park, Gaoling District, Xi'an City, Shaanxi Province Patentee before: SHAANXI CHANGYU AVIATION EQUIPMENT CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |