CN214920601U - Special clamp for machining inner diameter of symmetrically split aluminum cylinder part - Google Patents
Special clamp for machining inner diameter of symmetrically split aluminum cylinder part Download PDFInfo
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- CN214920601U CN214920601U CN202022010917.3U CN202022010917U CN214920601U CN 214920601 U CN214920601 U CN 214920601U CN 202022010917 U CN202022010917 U CN 202022010917U CN 214920601 U CN214920601 U CN 214920601U
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Abstract
The utility model relates to a special fixture for processing the inner diameter of a symmetrically split aluminum cylinder part, which comprises a body, a radial adjusting screw, a central shaft, a three-jaw chuck plate and a sleeve; one end of the central shaft is fixedly connected with the three-jaw chuck, a square groove is arranged on the circumference of the other end of the central shaft and is placed in the body, 4 radial adjusting screws penetrate through the body and are screwed into the square groove of the central shaft for fixing, and a gap is arranged between the square groove and the diameter of the radial adjusting screw positioning shaft; the three-jaw chuck clamps the outer diameter of one end of the sleeve, and the center frame is supported on the outer diameter of the other end of the sleeve. The utility model discloses guaranteed that the hole precision requirement of guaranteeing to cut open the aluminium section of thick bamboo spare symmetrically has guaranteed that the location of part and anchor clamps, the plane degree of the face that compresses tightly, state such as depth of parallelism are good, can guarantee to relapse the precision after the clamping is dismantled, satisfy the production and processing requirement. The coaxiality of the sleeve 27 is aligned by adjusting the 4 radial screws 20, and the jumping error of the sleeve is ensured to be less than 0.03 mm. The processing range is wide, and the applicability is strong.
Description
Technical Field
The utility model belongs to the machining field, concretely relates to special fixture of aluminium barrel spare internal diameter is cut open to processing symmetry.
Background
At present, a method of turning to a finished product size and then cutting is generally adopted for a machining method of a symmetrically-cut precise thin-wall aluminum cylinder part, a common lathe or a numerical control lathe is adopted in a turning process, and the symmetrically-cut precise thin-wall aluminum cylinder part is generally carried out by adopting methods such as horizontal milling, linear cutting, water cutting and the like after turning. If the mode of cutting and reprocessing firstly is adopted to process the inner diameter, the existing clamp cannot guarantee the positioning of the symmetrically cut aluminum cylinder and the clamp and the flatness and parallelism of a pressing surface, and if a part is clamped too tightly, large stress deformation can be generated after processing. In addition, because of the three-jaw (holding) chuck in normal machine adds the use in-process, can appear wearing and tearing of different degree, will lead to after the clamping part like this, look for the problem that the timing is great with the magnetometer, axiality error.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a special fixture of aluminium section of thick bamboo spare internal diameter is cut open to processing symmetry solves the symmetry and cuts open the problem of accurate thin wall aluminium section of thick bamboo processing internal diameter in-process part clamping precision, has still solved the great problem of axiality error that the wearing and tearing of three-jaw (holding) chuck lead to.
The technical scheme of the utility model is that: a special clamp for processing the inner diameter of a symmetrically split aluminum cylinder part is characterized by comprising a body, a radial adjusting screw, a central shaft, a three-jaw chuck, a fastening ring and a sleeve; one end of the central shaft is fixedly connected with the three-jaw chuck, a square groove is arranged on the circumference of the other end of the central shaft and is placed in the body, 4 radial adjusting screws penetrate through the body and are screwed into the square groove of the central shaft for fixing, and a gap is arranged between the square groove and the diameter of the radial adjusting screw positioning shaft; the three-jaw chuck clamps the outer diameter of one end of the sleeve, and the center frame is supported on the outer diameter of the other end of the sleeve.
Has the advantages that: the utility model discloses guaranteed that the hole precision requirement of guaranteeing to cut open the aluminium section of thick bamboo spare symmetrically has guaranteed that the location of part and anchor clamps, the plane degree of the face that compresses tightly, state such as depth of parallelism are good, can guarantee to relapse the precision after the clamping is dismantled, satisfy the production and processing requirement. The coaxiality of the sleeve 27 is aligned by adjusting the 4 radial screws 20, and the jump error of the sleeve 27 is ensured to be less than 0.03 mm. The processing range is wide, and the applicability is strong.
Description of the drawings:
FIG. 1 is a drawing of a blank of an aluminum cylinder after the symmetrical cutting is completed
FIG. 2-finish turning symmetrical splitting aluminum cylinder part inner diameter special fixture
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2
FIG. 4 is a schematic view of a finish-turning symmetrical splitting aluminum cylinder inner diameter special fixture for completing clamping
Detailed Description
The purpose, content and advantages of the present invention will be more clearly understood by describing and explaining the embodiments of the present invention in detail.
The utility model provides a special fixture of aluminium barrel spare internal diameter is cut open to processing symmetry, its characterized in that: the clamp comprises a flange plate 17, 4 fastening screws 18, a body 19, 4 radial adjusting screws 20, a fixing plate 21, a horseshoe scrap-proof ring 22, 4 axial fastening screws 23, a central shaft 24, a three-jaw chuck 25, a fastening ring 26, a sleeve 27 with the inner diameter of a finished product and a fastening ring 28; when the three-jaw chuck is used, the central shaft 24 and the three-jaw chuck 25 are connected together through 4 axial fixing screws 23 in the first step, then the central shaft 24 is placed in the body 19, 4 radial adjusting screws 20 are screwed into square grooves of the central shaft 24 for fixing, and the gap between the square grooves and the diameter size of the positioning shaft of the radial adjusting screws is 0.01-0.02 mm; the horseshoe chip-proof ring 22 is embedded between the body 19 and the central shaft 24, and the fixing piece 21 is fixed on the body 19 and the central shaft 24 by using a countersunk head screw, so that the horseshoe chip-proof ring 22 cannot be separated in the machining rotation process.
The body 19 is connected with the flange 17 through 4 fastening screws 18, after the flange 17 is connected and fixed with a lathe driving shaft, a symmetrically-cut aluminum cylinder which finishes the turning of the outer diameter size of a finished product is arranged in a sleeve 27 which is processed into the inner diameter of the finished product, after two ends are axially fixed by fastening rings 26 and 28, the outer diameter of the sleeve 27 is clamped by a three-jaw chuck 25, the other end is supported on the outer diameter of the sleeve 27 by a center frame 29, because the three-jaw chuck can be worn in different degrees in the normal machining process, after the sleeve 27 which is processed into the inner diameter of the finished product is clamped, the alignment is carried out by a magnetometer, the coaxiality error is larger, the sleeve 27 can not meet the requirement that the coaxiality is less than 0.03mm, at the moment, the coaxiality of the sleeve 27 can be aligned by adjusting 4 radial screws 20, the jumping error of the sleeve 27 is ensured to be less than 0.03mm, and then the 4 radial adjusting screws 20 are locked, and after clamping is completed, the other end of the sleeve is supported by the center frame, and the supporting end of the center frame supporting frame 29 of the sleeve 27 is aligned, so that the coaxiality is ensured to be less than 0.03 mm.
Because the process is a finish turning process, a numerical control machine tool or turning center equipment which is high in precision, stable in state and sufficient in cooling is preferably selected to finish machining. Before the parts are machined in each shift, the equipment needs to be preheated, so that the equipment idles for more than half an hour, and the machining is started after the optimal stable state of the equipment is reached. According to the precision requirement of part machining, the radial runout and axial play conditions of the main shaft of the equipment are checked before machining, and the requirement of machining precision is met.
The symmetrically split aluminum cylinder part with finished outer diameter is loaded on the special fixture, one end of the outer diameter of the sleeve 27 is clamped by an adjustable three-jaw self-centering chuck fixture on a lathe, the other end of the outer diameter of the sleeve 27 is supported on the outer diameter of the sleeve 27 by a center frame 29, and the inner diameter size of the symmetrically split aluminum cylinder part finished product is turned.
The clamping of the part in the machining process ensures that the positioning of the part and the clamp, the flatness and parallelism of the pressing surface and the like are good, all surfaces are cleaned up and are ensured not to clamp scraps, all components of the clamp are positioned and the pressing force is controlled to be larger than the cutting force, the part cannot be clamped too tightly, and the large stress deformation after machining is avoided.
The sleeve 27 with the inner diameter of the finished product is made of high-grade high-quality carbon structural steel T8A, the hardness of the sleeve 27 after quenching can reach HRC 50-55, the wall thickness reaches 18mm, the strength requirement of the sleeve can be guaranteed, the sleeve 27 with the inner diameter of the finished product is repeatedly processed through multiple procedures of rough turning, quenching, finish turning, grinding and the like, the circular runout of the inner diameter and the outer diameter of the sleeve is guaranteed to be less than 0.02mm, the coaxiality of the sleeve is guaranteed to be less than 0.01mm, the gap between the inner diameter and the outer diameter of a symmetrically-cut aluminum cylinder which finishes the outer diameter processing of the finished product is 0.05-0.10 mm, the size of the finished product during the inner diameter finish processing is guaranteed, the surface roughness reaches Ra0.8, the precision after repeated clamping and disassembly can be guaranteed, and the production and processing requirements are met.
The central shaft 24 is made of high-grade high-quality carbon structural steel T8A, the hardness of the quenched central shaft can reach HRC 50-55, the central shaft 24 is repeatedly processed through multiple procedures such as rough turning, quenching, finish turning, vertical milling, grinding and the like, the circular runout of the inner diameter and the outer diameter of the central shaft is guaranteed to be smaller than 0.02mm, the coaxiality of the central shaft is guaranteed to be smaller than 0.01mm, the gap between the central shaft 24 and a square groove surface matched with the radial adjusting screw 20 is 0.01-0.02 mm, and the stability of the central shaft in the processing process can be guaranteed.
Claims (10)
1. A special clamp for processing the inner diameter of a symmetrically-cut aluminum cylinder part is characterized by comprising a body (19), a radial adjusting screw, a central shaft (24), a three-jaw chuck (25) and a sleeve (27); one end of the central shaft is fixedly connected with the three-jaw chuck, a square groove is arranged on the circumference of the other end of the central shaft and is placed in the body, 4 radial adjusting screws penetrate through the body and are screwed into the square groove of the central shaft for fixing, and a gap is arranged between the square groove and the diameter of the radial adjusting screw positioning shaft; the three-jaw chuck clamps the outer diameter of one end of the sleeve, and the center frame is supported on the outer diameter of the other end of the sleeve.
2. The special fixture for machining the inner diameter of the symmetrically-cut aluminum cylinder part according to claim 1, wherein a horseshoe chip-proof ring is embedded in a gap between the body and the end face of the central shaft.
3. The special fixture for machining the inner diameter of the symmetrically-cut aluminum cylinder part according to claim 1, wherein the symmetrically-cut aluminum cylinder part is obtained by cutting an aluminum cylinder part blank from a symmetrical center line, and a knife edge of the symmetrically-cut aluminum cylinder part is smaller than 2 mm.
4. The special fixture for processing the inner diameter of the symmetrically-split aluminum cylinder part as claimed in claim 1, wherein the clearance between the square groove and the diameter of the radial adjusting screw positioning shaft is 0.01-0.02 mm.
5. The special fixture for machining the inner diameter of the symmetrically-split aluminum cylinder part as claimed in claim 4, wherein a flange is arranged at the other end of the body and is used for being connected with a driving shaft of a lathe.
6. The special fixture for machining the inner diameter of the symmetrically-cut aluminum cylinder part as claimed in claim 1, wherein the symmetrically-cut aluminum cylinder part is installed in the sleeve.
7. The special fixture for machining the inner diameter of the symmetrically-cut aluminum cylinder part as claimed in claim 1, wherein the two ends of the symmetrically-cut aluminum cylinder part are axially fixed by fastening rings.
8. The special fixture for processing the inner diameter of the symmetrically split aluminum cylinder part as claimed in claim 2, wherein the fixing plate is fixed on the body and the central shaft to limit the horseshoe anti-chip ring.
9. The special fixture for machining the inner diameter of the symmetrically split aluminum cylinder as claimed in claim 7, wherein the sleeve (27) is made of high grade carbon structural steel T8A.
10. The special fixture for machining the inner diameter of the symmetrically split aluminum cylinder as claimed in claim 9, wherein the central shaft is made of high-grade high-quality carbon structural steel T8A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022010917.3U CN214920601U (en) | 2020-09-15 | 2020-09-15 | Special clamp for machining inner diameter of symmetrically split aluminum cylinder part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022010917.3U CN214920601U (en) | 2020-09-15 | 2020-09-15 | Special clamp for machining inner diameter of symmetrically split aluminum cylinder part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214920601U true CN214920601U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022010917.3U Active CN214920601U (en) | 2020-09-15 | 2020-09-15 | Special clamp for machining inner diameter of symmetrically split aluminum cylinder part |
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| CN (1) | CN214920601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922114A (en) * | 2023-09-15 | 2023-10-24 | 江苏天健液压科技有限公司 | Lathe center frame capable of positioning rotation center of cylinder |
-
2020
- 2020-09-15 CN CN202022010917.3U patent/CN214920601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922114A (en) * | 2023-09-15 | 2023-10-24 | 江苏天健液压科技有限公司 | Lathe center frame capable of positioning rotation center of cylinder |
| CN116922114B (en) * | 2023-09-15 | 2023-12-12 | 江苏天健液压科技有限公司 | Lathe center frame capable of positioning rotation center of cylinder |
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