CN114289749A - Clamp for machining eccentric excircle and clamping method - Google Patents
Clamp for machining eccentric excircle and clamping method Download PDFInfo
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- CN114289749A CN114289749A CN202111551189.XA CN202111551189A CN114289749A CN 114289749 A CN114289749 A CN 114289749A CN 202111551189 A CN202111551189 A CN 202111551189A CN 114289749 A CN114289749 A CN 114289749A
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- 238000003754 machining Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 210000000078 claw Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to the field of machining, in particular to a clamp for machining an eccentric excircle and a clamping method. The technical problems that the clamping is difficult when an eccentric excircle is machined on a common lathe at present, particularly, the alignment is needed when an eccentric circle workpiece is machined, and the working procedure is complicated are solved. A clamp for machining an eccentric excircle comprises a disc, wherein a first limiting boss is arranged on one end face of the disc, and a second limiting boss is arranged on the surface of the first limiting boss; the axis of the first limiting boss deviates from the axis of the disc by a certain distance. The invention mainly solves the clamping problem of processing the eccentric excircle on the common lathe, and the excircle of the second limiting boss is aligned in advance, so that when a workpiece to be processed is subsequently clamped, the workpiece can be aligned only by propping the inner hole of the eccentric excircle of the workpiece by the center on the lathe, and the workpiece does not need to be aligned again when being clamped every time, thereby greatly improving the processing efficiency of the product.
Description
Technical Field
The invention relates to the field of machining, solves the clamping problem of machining an eccentric excircle on a common lathe, and particularly relates to a clamp for machining the eccentric excircle and a clamping method.
Background
The outer sleeve of an inner shell of a certain product is a welding piece (the specific structure is shown in figure 1) formed by 1Cr18Ni9Ti and 0Cr18Ni10Ti materials, when an eccentric excircle and a groove are machined according to the original process requirements, a four-jaw chuck is used for clamping an eccentric chuck (the specific structure is shown in figures 4 and 5), then a workpiece is arranged in the eccentric chuck, and after an inner hole phi D1 of the workpiece is aligned by means of table drawing, the eccentric excircle is machined. However, in actual machining, each workpiece needs to be clamped by four claws and repeatedly marked to align the workpiece, and the marking and aligning time is long, which seriously affects the machining efficiency of the product. In order to adapt to mass production, improve the processing efficiency of products and reduce the processing cost, a processing scheme which is convenient to operate, economic, safe, efficient and reliable is urgently needed to be found.
The outer sleeve of the inner shell is a workpiece with an eccentric circle, the inner diameter of an eccentric round hole of the outer shell is phi D1, a 60-degree groove is formed in the opening part of the eccentric circle, and the maximum outer diameter phi D1 is arranged at the groove; the outer diameter of the large port at the other end is phi D2, the inner diameter is phi D2, the machining tolerance is phi D2H8, and the distance between the axis of the eccentric circle and the workpiece spindle is L1.
Disclosure of Invention
The invention provides a clamp for a vehicle for machining an eccentric excircle and a clamping method, aiming at solving the technical problems that clamping is difficult when an eccentric excircle is machined on a common lathe at present, particularly, alignment is needed when each eccentric circle workpiece is machined, and the working procedure is complicated.
The clamp for machining the eccentric excircle of the invention is realized by adopting the following technical scheme: a first limiting boss is arranged on one end face of the disc, and a second limiting boss is arranged on the surface of the first limiting boss; the first limiting boss and the second limiting boss are both of cylindrical structures, and the diameter of the second limiting boss is smaller than that of the first limiting boss; the axes of the first limiting boss and the second limiting boss penetrate through the vertical central line of the end face of the disc where the first limiting boss and the second limiting boss are located, the axis of the second limiting boss is overlapped with the axis of the disc, and the axis of the first limiting boss and the axis of the disc deviate for a certain distance.
The offset distance between the axis of the first limiting boss and the axis of the disc is equal to the distance between the axis of an eccentric circle on the workpiece to be machined and the workpiece spindle.
The outer diameter of the first limiting boss is in clearance fit with the inner diameter of the large end hole of the workpiece.
The clamping method of the clamp for the eccentric excircle machining vehicle is realized by adopting the following technical scheme:
1) when the eccentric outer circle is machined, a four-jaw chuck is used for clamping the vehicle clamp, and the outer circle of a second limiting boss on the clamp is aligned by striking a meter;
2) positioning and clamping the inner hole of the large end of the workpiece by using the excircle of a first limiting boss of the automotive clamp;
3) directly propping the chamfer of the inner orifice part of the eccentric circle on the workpiece by the tip on the tailstock of the lathe to align the workpiece; after the center is tightly propped, the workpiece can be processed;
4) along with the rotation of the lathe chuck, the rotation center of the lathe chuck does not coincide with the center of the clamping and positioning workpiece on the vehicle clamp, so that the workpiece is loaded into the clamp to form a self-locking phenomenon, and the clamp is firm and reliable in clamping.
The invention mainly solves the clamping problem of processing the eccentric excircle on the common lathe, and the excircle of the second limiting boss is aligned in advance, so that when a workpiece to be processed is subsequently clamped, the workpiece can be aligned only by propping the inner hole of the eccentric excircle of the workpiece by the center on the lathe, and the workpiece does not need to be aligned again when being clamped every time, thereby greatly improving the processing efficiency of the product.
Compared with the tool and the clamping method used in the prior art, the invention has the following processing advantages:
1) the technical requirements of the product process can be completely met, so that the processing quality of the product is better ensured;
2) after the vehicle clamp is used for once alignment by meter reading, a plurality of workpieces can be processed without repeatedly aligning the workpieces by meter reading;
3) the technical difficulty of workers in processing the workpiece is reduced, and the processing efficiency of the product is improved by more than 5 times.
Therefore, when the turning clamp is used for machining the eccentric excircle on a common lathe, the turning clamp is a machining method which is convenient to operate, economic, safe, efficient and reliable, and is particularly suitable for machining workpieces produced in batches.
Drawings
Fig. 1 is a schematic structural diagram of a workpiece (inner shell outer sleeve) with an eccentric circle.
FIG. 2 is a schematic structural view of the vehicular clamp of the present invention.
Fig. 3 is a side view of fig. 2.
Fig. 4 is a schematic structural view of a clamping tool used at present.
Fig. 5 is a side view of fig. 4.
1-disc, 2-first spacing boss, 3-second spacing boss.
Detailed Description
The invention provides a good processing scheme mainly for processing eccentric excircle on a common lathe.
In order to improve the processing efficiency of products and reduce the processing cost of workpieces. The inventor processes an eccentric excircle of a certain product on a common lathe through practice and continuous search for many times, innovates a vehicle clamp of the workpiece, designs a set of vehicle clamps as shown in figures 2 and 3, and greatly reduces the time for making and aligning a watch during processing. The vehicle clamp comprises a disc 1, wherein a first limiting boss 2 is arranged on one end face of the disc 1, and a second limiting boss 3 is arranged on the surface of the first limiting boss 2; the first limiting boss and the second limiting boss are both of cylindrical structures; the axes of the first and second limit bosses penetrate through the vertical central line of the end face of the disc 1, the axis of the second limit boss 3 coincides with the axis of the disc, the axis of the first limit boss 2 deviates from the axis of the disc 1 by a certain distance L1, and the diameter of the second limit boss 3 is smaller than that of the first limit boss 2, and the projection of the second limit boss 3 on the end face of the disc 1 completely falls into the first limit boss 2. The diameter of the outer circle of the first limiting boss is phi d3, and the machining tolerance is phi d3g 8.
The specific use method of the vehicle clamp comprises the following steps: during machining, firstly, a four-jaw chuck is used for clamping a turning fixture, the excircle of a second limiting boss on the fixture is calibrated and aligned to enable the meter jump to be less than 0.01mm, then, the excircle of a first limiting boss of the turning fixture is used for positioning and clamping an inner hole (phi D2) at the left large end of a workpiece, a tip on a lathe tailstock directly props against a 60-degree chamfer angle at an inner hole opening part of a right eccentric circle phi D1 on the workpiece, the workpiece can be aligned, and the workpiece can be machined after being tightly propped by the tip; then, along with the rotation of the lathe spindle, the rotation center of the lathe spindle does not coincide with the center of a clamping and positioning workpiece on the vehicle clamp, so that the workpiece is arranged in the clamp to form a self-locking phenomenon, and the clamp is firm and reliable in clamping. The design ensures that the processed excircle is concentric with the excircle of the clamping part of the turning clamp, and solves the problem of processing the eccentric excircle on a common lathe.
The invention has the technical characteristics that:
1. through designing the automobile clamp, the workpiece is guaranteed to have clamping and positioning reference, a plurality of workpieces can be processed only by once automobile clamp through meter reading and alignment, the workpieces do not need to be repeatedly meter reading and alignment, and the problems of processing and clamping of eccentric workpieces are solved.
2. The self-locking phenomenon formed by the rotation center of the lathe spindle and the vehicle clamp ensures the firmness and reliability of clamping the workpiece by the vehicle clamp.
Claims (7)
1. A clamp for machining an eccentric excircle comprises a disc, and is characterized in that a first limiting boss is arranged on one end face of the disc, and a second limiting boss is arranged on the surface of the first limiting boss; the first limiting boss and the second limiting boss are both of cylindrical structures, and the diameter of the second limiting boss is smaller than that of the first limiting boss; the axes of the first limiting boss and the second limiting boss penetrate through the vertical central line of the end face of the disc where the first limiting boss and the second limiting boss are located, the axis of the second limiting boss is overlapped with the axis of the disc, and the axis of the first limiting boss and the axis of the disc deviate for a certain distance.
2. The turning jig for machining an eccentric outer circle according to claim 1, wherein the axis of the first limit boss is offset from the axis of the disc by a distance equal to a distance between the axis of the eccentric circle on the workpiece and the spindle of the workpiece.
3. The turning clamp for machining the eccentric outer circle according to claim 2, wherein the outer diameter of the first limiting boss is in clearance fit with the inner diameter of the large-end hole of the workpiece.
4. The clamping method of the clamp for machining the eccentric excircle is characterized by comprising the following steps of: 1) when the eccentric outer circle is machined, a four-jaw chuck is used for clamping the vehicle clamp, and the outer circle of a second limiting boss on the clamp is aligned by striking a meter;
2) positioning and clamping the inner hole of the large end of the workpiece by using the excircle of a first limiting boss of the automotive clamp;
3) directly propping the chamfer of the inner orifice part of the eccentric circle on the workpiece by the tip on the tailstock of the lathe to align the workpiece; after the center is tightly propped, the workpiece can be processed;
4) along with the rotation of the lathe chuck, the rotation center of the lathe chuck does not coincide with the center of the clamping and positioning workpiece on the vehicle clamp, so that the workpiece is loaded into the clamp to form a self-locking phenomenon, and the clamp is firm and reliable in clamping.
5. The turning jig for machining eccentric excircle according to claim 4, characterized in that, when the excircle of the second limit boss on the jig is aligned by striking the watch, the jump of the watch is made to be less than 0.01 mm.
6. The turning jig for machining eccentric outer circles as set forth in claim 4 or 5, wherein the workpiece with the eccentric outer circles is a weldment formed of 1Cr18Ni9Ti and 0Cr18Ni10Ti materials.
7. The turning jig for machining an eccentric outer circle according to claim 4 or 5, wherein an outer diameter of the limit boss is phid 3 and a machining tolerance is phid 3g 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111551189.XA CN114289749A (en) | 2021-12-17 | 2021-12-17 | Clamp for machining eccentric excircle and clamping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111551189.XA CN114289749A (en) | 2021-12-17 | 2021-12-17 | Clamp for machining eccentric excircle and clamping method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114289749A true CN114289749A (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111551189.XA Pending CN114289749A (en) | 2021-12-17 | 2021-12-17 | Clamp for machining eccentric excircle and clamping method |
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| Country | Link |
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| CN (1) | CN114289749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319511A (en) * | 2022-04-22 | 2022-11-11 | 成都飞机工业（集团）有限责任公司 | Turning device and turning method for eccentric part |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014167A (en) * | 2003-06-27 | 2005-01-20 | Hitachi Ltd | Processing method of shaft having a plurality of eccentric parts |
| CN201511254U (en) * | 2009-09-25 | 2010-06-23 | 上海电机学院 | Clamp special for turning eccentric shaft parts |
| CN201907009U (en) * | 2010-12-20 | 2011-07-27 | 天津市中海上达机械制造有限公司 | Fixture for planet carrier lathe |
| CN204954388U (en) * | 2015-08-06 | 2016-01-13 | 南京金鑫传动设备有限公司 | Bent axle special fixture |
| CN105935782A (en) * | 2016-07-01 | 2016-09-14 | 江苏赫夫特齿轮制造有限公司 | Clamping device used for crankshaft machining |
| CN109079168A (en) * | 2018-10-11 | 2018-12-25 | 中车戚墅堰机车车辆工艺研究所有限公司 | Crankshaft processing device and processing method |
| CN210209576U (en) * | 2019-06-27 | 2020-03-31 | 山东能源重型装备制造集团有限责任公司 | Machining tool for eccentric pin shaft |
-
2021
- 2021-12-17 CN CN202111551189.XA patent/CN114289749A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014167A (en) * | 2003-06-27 | 2005-01-20 | Hitachi Ltd | Processing method of shaft having a plurality of eccentric parts |
| CN201511254U (en) * | 2009-09-25 | 2010-06-23 | 上海电机学院 | Clamp special for turning eccentric shaft parts |
| CN201907009U (en) * | 2010-12-20 | 2011-07-27 | 天津市中海上达机械制造有限公司 | Fixture for planet carrier lathe |
| CN204954388U (en) * | 2015-08-06 | 2016-01-13 | 南京金鑫传动设备有限公司 | Bent axle special fixture |
| CN105935782A (en) * | 2016-07-01 | 2016-09-14 | 江苏赫夫特齿轮制造有限公司 | Clamping device used for crankshaft machining |
| CN109079168A (en) * | 2018-10-11 | 2018-12-25 | 中车戚墅堰机车车辆工艺研究所有限公司 | Crankshaft processing device and processing method |
| CN210209576U (en) * | 2019-06-27 | 2020-03-31 | 山东能源重型装备制造集团有限责任公司 | Machining tool for eccentric pin shaft |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319511A (en) * | 2022-04-22 | 2022-11-11 | 成都飞机工业（集团）有限责任公司 | Turning device and turning method for eccentric part |
| CN115319511B (en) * | 2022-04-22 | 2023-12-08 | 成都飞机工业（集团）有限责任公司 | Turning device and turning method for eccentric part |
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Application publication date: 20220408 |
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| RJ01 | Rejection of invention patent application after publication |