CN111347263A - Clamp for processing shaft sleeve type part with external thread surface - Google Patents
Clamp for processing shaft sleeve type part with external thread surface Download PDFInfo
- Publication number
- CN111347263A CN111347263A CN202010287042.3A CN202010287042A CN111347263A CN 111347263 A CN111347263 A CN 111347263A CN 202010287042 A CN202010287042 A CN 202010287042A CN 111347263 A CN111347263 A CN 111347263A
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- China
- Prior art keywords
- deflector rod
- positioning block
- clamp body
- clamp
- hole
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- 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.)
- Pending
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- 238000003754 machining Methods 0.000 claims abstract description 18
- 230000004323 axial length Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002498 deadly effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
A clamp for processing a shaft sleeve part with an external thread surface comprises a clamp body, a positioning block, a movable nut, a plug and a deflector rod. The movable nut is sleeved on the outer circumferential surface of the fixture body and is positioned corresponding to the fixture body deflector rod hole on the circumference of the fixture body. The positioning block is arranged in the clamp body, and a positioning block poking rod hole on the positioning block corresponds to a clamp body poking rod hole on the circumference of the clamp body. The deflector rod penetrates through the deflector rod hole of the fixture body and is arranged in the deflector rod hole of the positioning block on the positioning block, and two ends of the deflector rod are respectively arranged in the deflector rod hole on the inner circumferential surface of the movable nut. The numerical control machining device is suitable for numerical control machining of shaft sleeve type parts with external thread surfaces, has the advantages of high machining precision, convenience in disassembly, high efficiency and good interchangeability, can be repeatedly used, and can be used only by using the dial indicator to align the aligning belt of the clamp body and the jump quantity of the end surface of the clamping end to be not more than 0.02 mm.
Description
Technical Field
The invention relates to the field of machining, in particular to a special clamp for numerical control machining of a shaft sleeve type part with an external thread surface.
Background
The numerical control lathe is the most common device in machining, and the rotary material body is turned by a turning tool to meet the forming requirement of a workpiece. The shaft sleeve part is a hollow thin-wall part in the revolving body part, the outer surface of the hollow thin-wall part is matched with a frame or a box hole in an interference fit or transition fit mode to play a supporting role, and the inner hole mainly plays a guiding and supporting role and is matched with a moving shaft, a piston and a slide valve. The shaft sleeve type part occupies a large proportion in mechanical parts, is a common part in mechanical processing, and is widely applied to various machines. The requirements of coaxiality and runout quantity of a shaft sleeve part with an external thread surface during processing are high, the highest requirement can reach 0.01mm, and the requirements of precision (IT5-IT6) of an outer circle and an inner hole, precision (IT6-IT7) of a geometric shape and position precision are high. The traditional processing mode is processing by adopting a universal three-jaw chuck and the like. Firstly, for parts with low rigidity or thin-wall sleeve parts, the radial cutting force is easy to cause the parts to be subjected to uneven bending deformation, so that the cutting depth is changed, and the taper error and the roundness error are caused; secondly, three-jaw direct clamping threads are adopted for processing, synchronous operation of a plurality of clamping jaws is difficult to achieve in the fixing process, an eccentric phenomenon is easy to occur, if the clamping force is too large, the thread part of the shaft sleeve is easy to be clamped, and the shaft sleeve type part with the external thread surface is inaccurate in positioning, so that the processing precision is influenced; and finally, under the action of cutting force, the positioning end face and the positioning end face of the thread tire are tightly pushed due to screwing after the part is machined, so that the disassembling force cannot be effectively transmitted, the part cannot be disassembled, and if the part is not disassembled properly, the product and the thread tire can be damaged, and the subsequent machining cannot be completed.
Disclosure of Invention
The invention provides a clamp for machining a shaft sleeve type part with an external thread surface, aiming at overcoming the defects that in the prior art, the part is easy to generate uneven bending deformation, so that the machining error is large, the precision is low, and a positioning end surface of a workpiece, which is in contact with the clamp, is tightly propped due to screwing, so that the workpiece and the clamp are damaged.
The invention comprises a clamp body, a positioning block, a movable nut, a plug and a deflector rod. The movable nut is sleeved on the outer circumferential surface of the fixture body and is positioned corresponding to a fixture body driving rod hole on the circumference of the fixture body. The positioning block is arranged in the clamp body, and a positioning block poking rod hole on the positioning block corresponds to a clamp body poking rod hole on the circumference of the clamp body. The deflector rod penetrates through the deflector rod hole of the fixture body and is arranged in the deflector rod hole of the positioning block on the positioning block, and two ends of the deflector rod are respectively arranged in the deflector rod hole on the inner circumferential surface of the movable nut.
One end of the clamp body is a clamping section of the workpiece, and the clamping section is provided with an internal thread for clamping the workpiece; the other end of the fixture body is a working section of the positioning block, and the inner circumferential surface where the working section is located is in sliding fit with the outer circumferential surface of the positioning block. The end face formed by the inner diameter difference between the clamping section and the working section is a positioning face of the positioning block. The outer circumferential surface of the middle part of the clamp body is provided with a circumference for installing an external thread section of the movable nut. And strip-shaped through holes are symmetrically distributed and used for placing the deflector rod. An annular groove is formed in the outer circumference of the end head of the clamping section of the clamp body, the groove is an alignment belt of the clamp, and the distance between the center of the axial width of the alignment belt and the end face of the clamping section is 6.5 mm.
The axial length of bar through-hole is 15mm, and the width is 6 mm. The axial width of the alignment belt is 7mm, and the radial depth is 1 mm.
A radial deflector rod groove is arranged at the axial length center of the inner surface of the movable nut, the inner diameter of the movable nut at the deflector rod groove is the same as the length of the deflector rod, and the width of the deflector rod groove is the same as the diameter of the deflector rod; the deflector rod is in clearance fit with the deflector rod groove. A deflector rod hole communicated with the deflector rod groove is formed in the movable nut; the surface of the deflector rod hole is an internal thread surface for installing the plug.
The positioning block is provided with a radial through strip-shaped hole; the length and the width of the strip-shaped hole are both adapted to the length and the width of the cross section of the deflector rod, and the deflector rod and the strip-shaped hole are in clearance fit after being arranged in the strip-shaped hole. The end face of the clamp body, which is positioned at one end of the clamping section of the clamp body, is a positioning end face.
The jig can be repeatedly used, and the jump quantity of the end faces of the alignment belt and the clamping end of the jig body is not more than 0.02mm only by using the dial indicator during use.
The invention is suitable for numerical control machining of shaft sleeve parts with external thread surfaces, and has the advantages of high machining precision, convenience in disassembly, high efficiency, good interchangeability and the like compared with the traditional clamping mode. The defect that parts are easy to be damaged by a traditional processing mode is overcome by adopting thread positioning. The manual rotation of the movable nut can drive the shifting rod to do linear motion on the clamp body, and meanwhile, the positioning block is driven to do linear motion, so that the problem that parts cannot be dismounted due to the fact that the parts existing in the prior art are stressed by cutting force after being processed, the positioning end face and the positioning end face of the thread tire are fastened and are deadly jacked, the dismounting force cannot be effectively transmitted, and products and the thread tire cannot be damaged if the parts are dismounted improperly, and follow-up processing cannot be completed is solved.
The invention processes parts by means of thread positioning, realizes the effects of accurate and rapid positioning and eliminating processing errors based on uniform elastic deformation of the shaft sleeve, ensures that the shaft sleeve parts are not deformed by accurate positioning while realizing efficient disassembly and assembly, and meets the processing requirements of the shaft sleeve parts with high precision requirements. Simultaneously avoids the phenomenon that the thread is damaged by the traditional three-jaw clamping mode
The movable nut is adopted to rotate to drive the positioning block to move linearly (the movable positioning surface is adopted), so that the phenomenon that the positioning end surface and the positioning end surface of the thread tire are tightly pushed due to the effect of cutting force after the part is machined, the disassembling force cannot be effectively transmitted, the part cannot be disassembled, even if the part is not disassembled properly, the product and the thread tire can be damaged, and the subsequent machining cannot be completed is avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an axial schematic view of the present invention.
Fig. 3 is an assembly schematic of the present invention.
Fig. 4 is a schematic structural view of the clamp body.
Fig. 5 is a schematic structural view of the traveling nut.
In the figure: 1. a clamp body; 2. positioning blocks; 3. moving the nut; 4. a plug; 5. a deflector rod; 6. aligning the belt; 7. positioning the end face; 8. and (5) a workpiece.
Detailed Description
The embodiment is a clamp for machining a shaft sleeve type part with a threaded outer circle, and the clamp comprises a clamp body 1, a positioning block 2, a moving nut 3, a plug 4 and a deflector rod 5. The movable nut 3 is sleeved on the outer circumferential surface of the fixture body 1, and the position of the nut corresponds to a fixture body driving rod hole on the circumference of the fixture body. The positioning block 2 is arranged in the clamp body, and a positioning block poking rod hole on the positioning block corresponds to a clamp body poking rod hole on the circumference of the clamp body. The deflector rod 5 penetrates through the deflector rod hole of the fixture body and is arranged in a deflector rod hole of a positioning block on the positioning block, and two ends of the deflector rod are respectively arranged in deflector rod holes on the inner circumferential surface of the movable nut. When the clamp is used, a workpiece 8 is fixed in the clamping end of the clamp body through threads, and the inner end face of the workpiece is attached to the positioning end face of one end of the positioning block. The inner circumferential surface of the deflector rod hole of the fixture body is in clearance fit connection with the outer circumferential surface of the positioning block, and the maximum fit clearance is 0.06 mm.
The fixture body 1 is a hollow revolving body. One end of the clamp body is a clamping section of a workpiece, and the clamping end is provided with an internal thread for clamping the workpiece; the other end of the fixture body is a working section of the positioning block 2, and the inner circumferential surface of the working section is in sliding fit with the outer circumferential surface of the positioning block 2. The end face formed by the inner diameter difference between the clamping section and the working section is a positioning face of the positioning block. The outer circumferential surface of the middle part of the clamp body is provided with a circumference for installing an external thread section of the movable nut. And a pair of strip-shaped through holes are symmetrically distributed and used for placing the driving lever 3. The axial length of bar through-hole is 15mm, and the width is 6 mm. An annular groove is formed in the outer circumference of the end head of the clamping section of the clamp body 1, the groove is an alignment belt of the clamp, and the distance between the center of the axial width of the alignment belt and the end face of the clamping section is 6.5 mm; the alignment band has an axial width of 7mm and a radial depth of 1 mm.
The movable nut 3 is annular. The inner surface of the movable nut is a thread surface matched with the outer circumferential surface of the clamp body 1; an annular deflector rod groove for installing a deflector rod 5 is arranged at the axial length center of the inner surface of the movable nut, the inner diameter of the movable nut at the deflector rod groove is the same as the length of the deflector rod, and the width of the deflector rod groove is the same as the diameter of the deflector rod; the deflector rod is in clearance fit with the deflector rod groove. A deflector rod hole which is communicated with the deflector rod groove is arranged on the movable nut and is used for installing a deflector rod 5; the surface of the deflector rod hole is an internal thread surface for installing the plug. The outer circumferential surface of the movable nut is distributed with a process notch to facilitate the assembly, disassembly and rotation of the movable nut.
The cross section of the shifting rod 3 is strip-shaped, and the external dimension of the shifting rod needs to meet the matching of the shifting rod with the fixture body 1, the movable nut 2 and the positioning block 8.
The positioning block 2 is cylindrical. The positioning block is provided with a radial through strip-shaped hole; the length and the width of the strip-shaped hole are both adapted to the length and the width of the cross section of the deflector rod 3, and the deflector rod and the strip-shaped hole are in clearance fit after being arranged in the strip-shaped hole. The end surface of the clamp body at one end of the clamping section of the clamp body is a positioning end surface 7.
The outer circumferential surface of the plug 4 is a threaded surface and is mounted in the through hole in the movable nut through threads, so that the deflector rod is blocked.
In use of this embodiment, the clamp body 1 is clamped with three jaws and the traveling nut 3 is mounted on the outer circumference of the clamp body. The driving lever 5 passes through a driving lever hole on the movable nut 3, a strip-shaped through hole on the fixture body 1 and a radial through strip-shaped hole on the positioning block 2, and two ends of the driving lever are respectively arranged in driving lever inner grooves on the movable nut; the driving lever 5 is blocked by a plug 4. When the movable nut axially moves on the outer circumferential surface of the fixture body through threads, the shifting rod drives the positioning block 2 to axially move until the positioning end face 7 of the positioning block is attached to the positioning face on the fixture body. And installing the workpiece 8 on the clamping section of the clamp body through threads. And after the machining is finished, reversely rotating the movable nut 3 to separate the end face of the movable nut from the end face of the positioning block, so that the workpiece is conveniently dismounted.
Claims (5)
1. A clamp for processing a shaft sleeve type part with an external thread surface is characterized by comprising a clamp body, a positioning block, a movable nut, a plug and a deflector rod; the movable nut is sleeved on the outer circumferential surface of the fixture body, and the position of the movable nut corresponds to a fixture body driving rod hole on the circumference of the fixture body; the positioning block is arranged in the clamp body, and a positioning block poking rod hole on the positioning block corresponds to a clamp body poking rod hole on the circumference of the clamp body; the deflector rod penetrates through the deflector rod hole of the fixture body and is arranged in the deflector rod hole of the positioning block on the positioning block, and two ends of the deflector rod are respectively arranged in the deflector rod hole on the inner circumferential surface of the movable nut.
2. The clamp for machining the shaft sleeve type part with the external thread surface according to claim 1, wherein one end of the clamp body is a clamping section of a workpiece, and the clamping section is provided with internal threads for clamping the workpiece; the other end of the fixture body is a working section of the positioning block, and the inner circumferential surface of the working section is in sliding fit with the outer circumferential surface of the positioning block; the end surface formed by the inner diameter difference between the clamping section and the working section is a positioning surface of the positioning block; the outer circumferential surface of the middle part of the clamp body is provided with a circumference for installing an external thread section of the movable nut; a pair of strip-shaped through holes are symmetrically distributed and used for placing the deflector rod; an annular groove is formed in the outer circumference of the end head of the clamping section of the clamp body, the groove is an alignment belt of the clamp, and the distance between the center of the axial width of the alignment belt and the end face of the clamping section is 6.5 mm.
3. The jig for machining a sleeve-like member having an externally threaded surface as claimed in claim 2, wherein the through-hole has an axial length of 15mm and a width of 6 mm; the axial width of the alignment belt is 7mm, and the radial depth is 1 mm.
4. The fixture for machining a sleeve-like member having an externally threaded surface as set forth in claim 1, wherein said traveling nut has a radial driver groove at the center of the axial length of the inner surface thereof, the inner diameter of the traveling nut at said driver groove being equal to the length of said driver, the width of said driver groove being equal to the diameter of said driver; the deflector rod is in clearance fit with the deflector rod groove; a deflector rod hole communicated with the deflector rod groove is formed in the movable nut; the surface of the deflector rod hole is an internal thread surface for installing the plug.
5. The fixture for machining the shaft sleeve type part with the external thread surface as claimed in claim 1, wherein the positioning block is provided with a radial through strip-shaped hole; the length and the width of the strip-shaped hole are both adapted to the length and the width of the cross section of the deflector rod, and the deflector rod and the strip-shaped hole are in clearance fit after being arranged in the strip-shaped hole; the end face of the clamp body, which is positioned at one end of the clamping section of the clamp body, is a positioning end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287042.3A CN111347263A (en) | 2020-04-13 | 2020-04-13 | Clamp for processing shaft sleeve type part with external thread surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287042.3A CN111347263A (en) | 2020-04-13 | 2020-04-13 | Clamp for processing shaft sleeve type part with external thread surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111347263A true CN111347263A (en) | 2020-06-30 |
Family
ID=71189547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010287042.3A Pending CN111347263A (en) | 2020-04-13 | 2020-04-13 | Clamp for processing shaft sleeve type part with external thread surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111347263A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720718U (en) * | 2010-06-07 | 2011-01-26 | 申科滑动轴承股份有限公司 | Thread mounting fixture |
| CN101972943A (en) * | 2010-10-27 | 2011-02-16 | 北京遥测技术研究所 | Turning positioning fixture for thin-wall rotational parts and clamping method |
| CN202377796U (en) * | 2011-11-16 | 2012-08-15 | 天津职业技术师范大学 | Numerical control turning fixture for inner outline of focusing guide ring |
| CN202655967U (en) * | 2012-05-29 | 2013-01-09 | 河南航天精工制造有限公司 | Fixture for clamping external threaded shaft and sleeve workpieces |
| CN104043851A (en) * | 2014-06-10 | 2014-09-17 | 西安航天动力机械厂 | Tool for processing cylindrical workpiece |
| CN204514711U (en) * | 2015-03-19 | 2015-07-29 | 钱和革 | Fixture |
| CN204724964U (en) * | 2015-06-23 | 2015-10-28 | 南京农业大学灌云现代农业装备研究院 | A kind of cutting thread fixture |
| CN106112632A (en) * | 2016-08-24 | 2016-11-16 | 湖北三江航天万山特种车辆有限公司 | A kind of copper sleeve inner hole turning positioning device |
| CN106944856A (en) * | 2017-04-20 | 2017-07-14 | 河钢股份有限公司邯郸分公司 | A kind of turning attachment for fixing single-ended whorl work piece |
| CN109277863A (en) * | 2017-07-21 | 2019-01-29 | 北京遥感设备研究所 | A kind of quick clamping device for sleeve part machining |
| CN212095298U (en) * | 2020-04-13 | 2020-12-08 | 西安航空制动科技有限公司 | Clamp for processing shaft sleeve with external thread surface |
-
2020
- 2020-04-13 CN CN202010287042.3A patent/CN111347263A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720718U (en) * | 2010-06-07 | 2011-01-26 | 申科滑动轴承股份有限公司 | Thread mounting fixture |
| CN101972943A (en) * | 2010-10-27 | 2011-02-16 | 北京遥测技术研究所 | Turning positioning fixture for thin-wall rotational parts and clamping method |
| CN202377796U (en) * | 2011-11-16 | 2012-08-15 | 天津职业技术师范大学 | Numerical control turning fixture for inner outline of focusing guide ring |
| CN202655967U (en) * | 2012-05-29 | 2013-01-09 | 河南航天精工制造有限公司 | Fixture for clamping external threaded shaft and sleeve workpieces |
| CN104043851A (en) * | 2014-06-10 | 2014-09-17 | 西安航天动力机械厂 | Tool for processing cylindrical workpiece |
| CN204514711U (en) * | 2015-03-19 | 2015-07-29 | 钱和革 | Fixture |
| CN204724964U (en) * | 2015-06-23 | 2015-10-28 | 南京农业大学灌云现代农业装备研究院 | A kind of cutting thread fixture |
| CN106112632A (en) * | 2016-08-24 | 2016-11-16 | 湖北三江航天万山特种车辆有限公司 | A kind of copper sleeve inner hole turning positioning device |
| CN106944856A (en) * | 2017-04-20 | 2017-07-14 | 河钢股份有限公司邯郸分公司 | A kind of turning attachment for fixing single-ended whorl work piece |
| CN109277863A (en) * | 2017-07-21 | 2019-01-29 | 北京遥感设备研究所 | A kind of quick clamping device for sleeve part machining |
| CN212095298U (en) * | 2020-04-13 | 2020-12-08 | 西安航空制动科技有限公司 | Clamp for processing shaft sleeve with external thread surface |
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