CN113182952A - Centering non-deformable grinding hole pitch circle clamp - Google Patents

Centering non-deformable grinding hole pitch circle clamp Download PDF

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Publication number
CN113182952A
CN113182952A CN202110595821.4A CN202110595821A CN113182952A CN 113182952 A CN113182952 A CN 113182952A CN 202110595821 A CN202110595821 A CN 202110595821A CN 113182952 A CN113182952 A CN 113182952A
Authority
CN
China
Prior art keywords
centering
clamp
positioning
pitch circle
deformation
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.)
Pending
Application number
CN202110595821.4A
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Chinese (zh)
Inventor
戴捷
颜忠辉
陈健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WENLING MINGHUA GEAR CO Ltd
Original Assignee
WENLING MINGHUA GEAR CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WENLING MINGHUA GEAR CO Ltd filed Critical WENLING MINGHUA GEAR CO Ltd
Priority to CN202110595821.4A priority Critical patent/CN113182952A/en
Publication of CN113182952A publication Critical patent/CN113182952A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/48Single-purpose machines or devices for grinding walls of very fine holes, e.g. in drawing-dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies
    • B24B41/067Work supports, e.g. adjustable steadies radially supporting workpieces

Abstract

The invention belongs to the technical field of machining, and relates to a hole grinding pitch circle clamp with no centering deformation, which comprises a clamp body, wherein an inner cam is assembled on the clamp body in a centering mode, a plurality of centering rabbets and positioning curved surfaces are arranged on the inner wall of the inner cam at intervals, the positioning curved surfaces are distributed in an Archimedes spiral mode, a centering assembly is arranged in the inner cam in a rotating mode, the centering assembly comprises an annular tooth-shaped retainer and a plurality of positioning rods loosely connected to the tooth-shaped retainer, and the positioning rods are in contact with the positioning curved surfaces to position workpieces. The grinding hole pitch circle clamp with the centering function and without deformation has the advantages of simple structure, low price, accurate centering function and no deformation during workpiece processing.

Description

Centering non-deformable grinding hole pitch circle clamp
Technical Field
The invention belongs to the technical field of machining, and relates to a hole grinding pitch circle clamp which is centering and non-deformable.
Background
In the planetary transmission mechanism, the space between the tooth root and the hole wall of the gear is very thin due to the space limitation of some planetary gear structures, but the requirement on the installation precision of the gear is very high in the high-precision planetary transmission, and the requirement on the roundness of an installed middle hole is very high. Therefore, the machining of such gears is very difficult because the hole wall is thin, which tends to cause clamping deformation when the hole is machined.
The company Semewo (SMW) in germany developed a film chuck for the machining of such parts. But the price is very expensive, and common companies cannot bear the price, so that the price cannot be popularized in a large area. Moreover, besides being expensive, it has other drawbacks:
1. the centering principle of the SMW clamp is an elastic deformation principle, and the centering of the workpiece is realized by using the elastic force generated by a precise spring body, so the centering clamping force is very small and stable. However, the centering accuracy may be lowered even after the elastomer is fatigued when the elastomer is frequently used.
2. The SMW clamp elastic body drives the positioning spherical surface to contact with the gear to achieve the purpose of centering, the centering precision is micron-sized, but the positioning spherical surface is difficult to replace by itself after being worn, the dependence of subsequent maintenance is caused, the economic payment is large, and the timeliness is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a grinding hole pitch circle clamp with no deformation during centering, which has the advantages of simple structure, low price, accurate centering and no deformation during workpiece processing.
In order to solve the above technical problems, the object of the present invention is achieved by the following technical solutions:
a hole grinding pitch circle clamp with the centering function being free of deformation comprises a clamp body, wherein an inner cam is assembled on the clamp body in a centering mode, a plurality of centering spigots and positioning curved surfaces are arranged on the inner wall of the inner cam at intervals, the positioning curved surfaces are distributed in an Archimedes spiral mode, a centering assembly is arranged in the inner cam in a rotating mode and comprises an annular tooth-shaped retainer and a plurality of positioning rods loosely connected to the tooth-shaped retainer, and the positioning rods are in contact with the positioning curved surfaces to be connected with positioning workpieces.
In the hole grinding pitch circle clamp with centering and no deformation, the positioning rods are loosely connected with the tooth-shaped holding frame, the gap between the positioning rods ensures that the measuring rods still have enough freedom after being positioned, and the positioning rods are uniformly distributed as much as possible according to the number of teeth of a workpiece.
In foretell centering indeformable grinds hole pitch circle anchor clamps, profile of tooth holder inwards extends and forms a plurality of location stick installation bosss, be provided with location stick installation through-hole on the location stick installation boss, the installation end of location stick is worn to establish in location stick installation through-hole, and the installation end of location stick passes through circlip axial spacing.
In the hole grinding pitch circle clamp with the centering and non-deformation functions, the mounting end of the positioning rod is arranged at the upper end of the positioning rod, and the radial dimension of the mounting end is smaller than that of the positioning rod.
In the hole grinding pitch circle clamp with the centering function and without deformation, the clamp body is provided with the clamp centering table, and the clamp centering table is matched with the centering spigot to center the inner cam.
In foretell centering indeformable grinds hole pitch circle anchor clamps, the centering subassembly still includes the terminal surface support ring of cover on the locating rod, the up end interval of terminal surface support ring is provided with the strong point of terminal surface under a plurality of support work pieces, the strong point sets up the clearance department between the locating rod.
In the hole grinding pitch circle clamp with the centering and no deformation, the upper end surface of the inner cam is provided with a plurality of limiting screws, and the limiting screws axially limit the tooth-shaped retainer.
In the hole grinding pitch circle clamp with centering and no deformation, the clamp body is internally provided with the connecting plate, the connecting plate is rotatably provided with the connecting columns, the connecting columns axially penetrate through the clamp body and the inner cam, and the upper ends of the connecting columns are fixedly provided with the pressing plates for pressing workpieces. Preferably, a rotating bearing is assembled on the connecting plate, and the lower end of the connecting column is assembled in the rotating bearing.
In foretell centering indeformable grinds hole pitch circle anchor clamps, be provided with the rotation curve groove on the spliced pole, the rotation curve groove slides with the backing pin cooperation of fixing in the anchor clamps body, be fixed with the pull rod on the connecting plate, the pull rod links to each other with actuating cylinder, and actuating cylinder pulling connecting plate downstream makes the spliced pole drive the clamp plate and rotates simultaneously.
In the hole grinding pitch circle clamp with the centering and the non-deformation function, a flange connected with a machine tool is arranged below the clamp body, a plurality of grooves are formed in the side wall of the clamp body, and fastening bolts for fixing the flange are arranged in the grooves.
In the hole grinding pitch circle clamp with the centering function and without deformation, the number of the positioning rods is determined according to workpieces, the centering spigot and the positioning curved surface are the same as the positioning rods, and preferably, the number of the centering spigot, the number of the positioning curved surface and the number of the positioning rods are 6.
In the hole grinding pitch circle clamp which is not deformed during centering, the diameter difference of the positioning rods is less than 0.001 mm.
The centering principle of the invention is as follows: when the gear is arranged in the retainer, the rotating gear drives the retainer to rotate, and the Archimedes curve radiuses in the inner cams corresponding to the distribution of the positioning rods are the same, so that the positioning rods gradually move towards the center along with the rotation of the gear due to the fact that the curve radiuses are gradually reduced, and the purpose of gapless centering is achieved.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention improves the structure of the grinding hole pitch circle clamp, realizes the centering of the workpiece through the matching of the centering assembly and the inner cam, and has the advantages of high centering precision, no deformation of the workpiece, long service life, simple structure and low price.
2. When the inner cam is designed, the cam assembly seam allowance (centering seam allowance) and the working curved surface (positioning curved surface) can be cut out by a traveling wire at one time, so that the mounting precision of the inner cam is ensured, and the use precision of the clamp is also ensured. The secondary error generated by separately processing the assembly spigot and the working curved surface is avoided.
3. The centering assembly of the invention adopts the combination of the tooth-shaped retainer and the positioning rod, the tooth-shaped retainer can freely rotate when a workpiece is installed, and the centering assembly does not need to be taken out of a clamp, thereby simplifying the installation of the workpiece.
4. The invention compresses the end face of the workpiece through the pressing plate driven by the oil cylinder, and simultaneously designs the supporting point of the lower end face of the workpiece, so that the workpiece cannot be deformed after the end face of the workpiece is compressed. In addition, the workpiece is rotated manually, so that the force is relatively small, and the centering deformation of the workpiece is avoided.
5. The invention controls the diameter precision of the positioning rod to control the centering precision of the workpiece. The positioning rod is selected to have the same diameter difference smaller than 0.001 mm. The precision of the inner cam can be within 0.003mm, and the positioning precision of the clamp is further ensured to be within 0.005 mm.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a perspective view of an inner cam of the present invention;
FIG. 4 is a perspective view of the centering assembly of the present invention;
reference numerals: 1. a clamp body; 2. an inner cam; 3. a centering spigot; 4. positioning the curved surface; 5. a toothed cage; 6. a positioning rod; 7. a workpiece; 8. the positioning rod is provided with a boss; 9. a circlip; 10. a fixture centering table; 11. an end face support ring; 12. a support point; 13. a restraining screw; 14. a connecting plate; 15. connecting columns; 16. pressing a plate; 17. rotating the curve groove; 18. a stop pin; 19. a pull rod; 20. and (4) a flange.
Detailed Description
The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings, see fig. 1-4:
a hole grinding pitch circle clamp with centering and non-deformation comprises a clamp body 1, wherein an inner cam 2 is assembled on the clamp body 1 in a centering mode, a plurality of centering spigots 3 and positioning curved surfaces 4 are arranged on the inner wall of the inner cam 2 at intervals, the positioning curved surfaces 4 are distributed in an Archimedes spiral mode, a clamp centering table 10 is arranged on the clamp body 1, the clamp centering table 10 is matched with the centering spigots 3 to center the inner cam 2, a centering assembly is arranged in the inner cam 2 in a rotating mode and comprises an annular toothed retainer 5 and a plurality of positioning rods 6 loosely connected to the toothed retainer 5, and the positioning rods 6 are in contact with the positioning curved surfaces 4 to be connected with positioning workpieces 7. In this embodiment, the workpiece 7 is a gear, and the number of the centering seam allowance 3, the number of the positioning curved surface 4 and the number of the positioning rods 6 are 6.
The positioning rods 6 are loosely connected with the tooth-shaped holding frames 5, the gaps of the positioning rods ensure that the measuring rods still have enough freedom after being positioned, and the positioning rods 6 are uniformly distributed as much as possible according to the number of teeth of the workpiece 7.
Referring to fig. 3, the specific connection structure of the positioning rod 6 and the tooth-shaped retainer 5 is as follows: tooth form holder 5 inwards extends and forms a plurality of location stick installation bosss 8, be provided with location stick installation through-hole on the location stick installation boss 8, the installation end of location stick 6 is worn to establish in location stick installation through-hole, and the installation end of location stick 6 is spacing through circlip 9 axial, avoids location stick 6 to drop. Further, the mounting end of the positioning rod 6 is arranged at the upper end of the positioning rod 6, and the radial dimension of the mounting end is smaller than that of the positioning rod 6.
The centering assembly further comprises an end face support ring 11 sleeved on the positioning rod 6, a plurality of support points 12 for supporting the lower end face of the workpiece 7 are arranged on the upper end face of the end face support ring 11 at intervals, the support points 12 are arranged at the gap between the positioning rods 6, the workpiece 7 is supported through the support points 12 after the end face of the workpiece 7 is compressed, the workpiece is not deformed, and the number of the support points 12 is 3.
The upper end surface of the inner cam 2 is provided with a plurality of limiting screws 13, and the limiting screws 13 axially limit the tooth-shaped retainer 5. The tooth-shaped retainer 5 can rotate freely under the limit of the limit screw 13, and the workpiece 7 can be installed freely without taking out the tooth-shaped retainer 5 and the positioning rod 6.
Referring to fig. 2, the structure of the axial pressing workpiece 7 of the present invention is:
the fixture body 1 is internally provided with a connecting plate 14, the connecting plate 14 is rotatably provided with a plurality of connecting columns 15, the connecting columns 15 axially penetrate through the fixture body 1 and the inner cam 2, and the upper ends of the connecting columns 15 are fixedly provided with press plates 16 for pressing the workpieces 7. Preferably, the connecting plate 14 is fitted with a rotary bearing, and the lower end of the connecting column 15 is fitted in the rotary bearing. The connecting column 15 adopts a design with equal length, and the connecting column can freely rotate without clearance, so that the connecting column 15 can rotate more flexibly by the bearing.
Furthermore, a rotating curve groove 17 is formed in the connecting column 15, the rotating curve groove 17 is matched with a stop pin 18 fixed in the fixture body 1 to slide, a pull rod 19 is fixed on the connecting plate 14, the pull rod 19 is connected with a driving oil cylinder, and the driving oil cylinder pulls the connecting plate 14, the connecting column 15 and the pressing plate 16 to move downwards and simultaneously enables the connecting column 15 to drive the pressing plate 16 to rotate.
The invention is connected with a machine tool through a flange 20, and the connecting structure of the flange 20 is as follows: the clamp comprises a clamp body 1 and is characterized in that a flange 20 connected with a machine tool is arranged below the clamp body 1, a plurality of grooves are formed in the side wall of the clamp body 1, and fastening bolts for fixing the flange 20 are arranged in the grooves.
The working process of the invention is as follows: the tooth gap of a workpiece 7 is aligned with a positioning rod 6 and placed in an inner cam 2, the workpiece 7 is manually rotated to drive a tooth-shaped retainer 5 and the positioning rod 6 to rotate together, and when the positioning rod 6 moves along a positioning curved surface 4, the positioning rod 6 gradually moves towards the center to realize zero-gap centering; then the driving oil cylinder pulls the connecting plate 14 to move downwards and drives the connecting column 15 and the pressing plate 16 to move downwards at the same time, but due to the existence of the rotating curve groove 17, the connecting column 15 and the pressing plate 16 rotate downwards while moving downwards, so that the end face of the workpiece 7 is pressed to complete clamping, and after the machining is completed, the workpiece 7 is taken down by reverse operation.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The hole grinding pitch circle clamp with the centering function and the non-deformation function comprises a clamp body (1) and is characterized in that an inner cam (2) is assembled on the clamp body (1) in a centering mode, a plurality of centering rabbets (3) and a positioning curved surface (4) are arranged on the inner wall of the inner cam (2) at intervals, the positioning curved surface (4) is distributed in an Archimedes spiral mode, a centering assembly is arranged in the inner cam (2) in a rotating mode and comprises an annular toothed retainer (5) and a plurality of positioning rods (6) loosely connected to the toothed retainer (5), and the positioning rods (6) are in contact connection with the positioning curved surface (4) to position a workpiece (7).
2. A hole grinding pitch circle clamp with centering and no deformation as claimed in claim 1, wherein the tooth-shaped retainer (5) extends inwards to form a plurality of positioning rod mounting bosses (8), positioning rod mounting through holes are formed in the positioning rod mounting bosses (8), the mounting ends of the positioning rods (6) penetrate through the positioning rod mounting through holes, and the mounting ends of the positioning rods (6) are axially limited through elastic check rings (9).
3. A hole grinding pitch circle clamp with centering non-deformation according to claim 1, characterized in that a clamp centering table (10) is arranged on the clamp body (1), and the clamp centering table (10) is matched with the centering rabbet (3) to center the inner cam (2).
4. A hole grinding pitch circle clamp with centering non-deformation according to claim 1, characterized in that the centering assembly further comprises an end face support ring (11) sleeved on the positioning rod (6), and a plurality of support points (12) for supporting the lower end face of the workpiece (7) are arranged on the upper end face of the end face support ring (11) at intervals.
5. A hole grinding pitch circle clamp with centering and no deformation as claimed in claim 1, characterized in that a plurality of limiting screws (13) are arranged on the upper end face of the inner cam (2), and the limiting screws (13) axially limit the tooth-shaped retainer (5).
6. A hole grinding pitch circle clamp with centering non-deformation function as claimed in claim 1, wherein a connecting plate (14) is arranged in the clamp body (1), a plurality of connecting columns (15) are rotatably arranged on the connecting plate (14), the connecting columns (15) axially penetrate through the clamp body (1) and the inner cam (2), and a pressing plate (16) for pressing a workpiece (7) is fixed at the upper ends of the connecting columns (15).
7. A hole grinding pitch circle clamp with centering and no deformation as claimed in claim 6, characterized in that a turning curve groove (17) is arranged on the connecting column (15), the turning curve groove (17) is matched with a stop pin (18) fixed in the clamp body (1) to slide, a pull rod (19) is fixed on the connecting plate (14), and the pull rod (19) is connected with a driving oil cylinder.
8. A hole grinding pitch circle clamp with centering and no deformation as claimed in claim 1, characterized in that a flange (20) for connecting a machine tool is arranged below the clamp body (1), a plurality of grooves are arranged on the side wall of the clamp body (1), and fastening bolts for fixing the flange (20) are arranged in the grooves.
9. A hole grinding pitch circle clamp with no deformation during centering as claimed in claim 1, wherein the centering spigot (3), the positioning curved surface (4) and the positioning rod (6) are all set to 6.
10. A hole grinding pitch circle clamp with centering non-deformation according to claim 1, wherein the diameter difference of the positioning rod (6) is less than 0.001 mm.
CN202110595821.4A 2021-05-29 2021-05-29 Centering non-deformable grinding hole pitch circle clamp Pending CN113182952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110595821.4A CN113182952A (en) 2021-05-29 2021-05-29 Centering non-deformable grinding hole pitch circle clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110595821.4A CN113182952A (en) 2021-05-29 2021-05-29 Centering non-deformable grinding hole pitch circle clamp

Publications (1)

Publication Number Publication Date
CN113182952A true CN113182952A (en) 2021-07-30

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Application Number Title Priority Date Filing Date
CN202110595821.4A Pending CN113182952A (en) 2021-05-29 2021-05-29 Centering non-deformable grinding hole pitch circle clamp

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909620A (en) * 2012-10-24 2013-02-06 常熟天地煤机装备有限公司 Universal type pitch circle positioning gear mill inner hole device
CN202878040U (en) * 2012-10-24 2013-04-17 常熟天地煤机装备有限公司 General type pitch circle locating gear inner bore grinding device
CN203622007U (en) * 2013-11-28 2014-06-04 上海西晨洋禾机械装备有限公司 Compressing device
CN203726334U (en) * 2013-12-11 2014-07-23 贵州黎阳航空动力有限公司 Cylindrical gear tooth surface centering hole grinding clamp
CN205342110U (en) * 2016-01-13 2016-06-29 重庆大合汽车配件有限公司 Internal spline anchor clamps are inserted to outer pitch circle location of internal spline gear
CN105817913A (en) * 2016-04-01 2016-08-03 台州格航冠机械制造有限公司 Clamp special for bevel gear
KR20160103340A (en) * 2015-02-24 2016-09-01 태림산업(주) Chuck for machining internal gear
CN108058043A (en) * 2017-12-23 2018-05-22 温岭市明华齿轮有限公司 Zero-clearance is felt relieved and /V compresses pitch-line chuck
US20180229337A1 (en) * 2017-02-13 2018-08-16 Smw-Autoblok Spannsysteme Gmbh Fixture and clamping housing
CN208496443U (en) * 2018-06-29 2019-02-15 安徽星瑞齿轮传动有限公司 One kind being applied to bore turning pitch circle fixture
CN211681010U (en) * 2019-12-30 2020-10-16 兴化东华齿轮有限公司 Special fixture for sprocket thin-wall part precision boring process

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909620A (en) * 2012-10-24 2013-02-06 常熟天地煤机装备有限公司 Universal type pitch circle positioning gear mill inner hole device
CN202878040U (en) * 2012-10-24 2013-04-17 常熟天地煤机装备有限公司 General type pitch circle locating gear inner bore grinding device
CN203622007U (en) * 2013-11-28 2014-06-04 上海西晨洋禾机械装备有限公司 Compressing device
CN203726334U (en) * 2013-12-11 2014-07-23 贵州黎阳航空动力有限公司 Cylindrical gear tooth surface centering hole grinding clamp
KR20160103340A (en) * 2015-02-24 2016-09-01 태림산업(주) Chuck for machining internal gear
CN205342110U (en) * 2016-01-13 2016-06-29 重庆大合汽车配件有限公司 Internal spline anchor clamps are inserted to outer pitch circle location of internal spline gear
CN105817913A (en) * 2016-04-01 2016-08-03 台州格航冠机械制造有限公司 Clamp special for bevel gear
US20180229337A1 (en) * 2017-02-13 2018-08-16 Smw-Autoblok Spannsysteme Gmbh Fixture and clamping housing
CN108058043A (en) * 2017-12-23 2018-05-22 温岭市明华齿轮有限公司 Zero-clearance is felt relieved and /V compresses pitch-line chuck
CN208496443U (en) * 2018-06-29 2019-02-15 安徽星瑞齿轮传动有限公司 One kind being applied to bore turning pitch circle fixture
CN211681010U (en) * 2019-12-30 2020-10-16 兴化东华齿轮有限公司 Special fixture for sprocket thin-wall part precision boring process

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