CN111002079B - High-precision double-layer self-centering clamping fixture and clamping method - Google Patents

High-precision double-layer self-centering clamping fixture and clamping method Download PDF

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Publication number
CN111002079B
CN111002079B CN201911373819.1A CN201911373819A CN111002079B CN 111002079 B CN111002079 B CN 111002079B CN 201911373819 A CN201911373819 A CN 201911373819A CN 111002079 B CN111002079 B CN 111002079B
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China
Prior art keywords
clamping
double
precision
layer self
centering
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CN111002079A (en
Inventor
赵文松
娄焕军
薛立桥
罗奎
吕艳云
李兆勋
魏胜永
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Laiwu Huijin Metal Products Co ltd
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Laiwu Huijin Metal Products Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02Chucks

Abstract

The invention provides a high-precision double-layer self-centering clamping fixture, and relates to the technical field of double-layer self-centering clamping fixtures. The clamping device comprises a standard hydraulic chuck and a special clamping jaw, and is suitable for machining and producing rotary parts in the field of machining. The double-layer self-centering clamping fixture realizes auxiliary clamping and main clamping on the same whole, at the moment of the clamping process, the auxiliary clamping is stressed in advance, and then the main clamping is stressed, so that two-point one-line long-distance clamping is formed, the auxiliary clamping part has elasticity, and micro back-pulling is generated while clamping, so that the axial positioning of a workpiece can be more closely attached, and the clamping rigidity and precision are greatly improved. The repeated positioning precision can reach < 0.005 mm. The invention realizes double-layer part clamping by single action, forms two-point one-line clamping and realizes high-precision positioning. The double-top finish turning process of the lathe can be saved. The invention can be applied to the machining of small-sized rotary shells and stepped shaft parts.

Description

High-precision double-layer self-centering clamping fixture and clamping method
Technical Field
The invention relates to the technical field of double-layer self-centering clamping fixtures, in particular to a high-precision double-layer self-centering clamping fixture and a clamping method.
Background
At present, the workpiece is often required to be fixed by a clamp in the processing of the workpiece, so that the workpiece is convenient to process or use, however, most of the existing clamping devices have the problems of low clamping repeated positioning precision, insufficient and unstable clamping rigidity, complex structure and over-positioning, clamping deformation and the like, so that the workpiece is deviated in the processing process, batch disqualification occurs, and serious people can cause damage to processing equipment and even endanger the life safety of operators. Therefore, in order to solve the problem, a clamping fixture which can enable the workpiece to be clamped and repeatedly positioned has the advantages of high precision, high clamping rigidity, stability, simple structure and wide application needs to be designed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-precision double-layer self-centering clamping fixture and a clamping method, and the clamping fixture which is high in clamping repeated positioning precision, high in clamping rigidity, stable, simple in structure and wide in application is achieved.
(II) technical scheme
In order to achieve the purpose of enabling the workpiece clamp to be tighter, the invention provides the following technical scheme: high-precision double-layer self-centering clamping fixture, which comprises a standard hydraulic chuck and a clamping mechanism, wherein the clamping mechanism comprises an upper ejection body, a fastening bolt, a communicating body, a fixture body, a clamping body, a screwing screw, a differential housing, a clamping body, an outer casing, an outer ferrule, a workpiece, a differential top casing, a connecting body, a locking screw, a top disc, a movable body and a pressing body, the movable body is arranged inside the standard hydraulic chuck, the outer surface bottom of the standard hydraulic chuck is connected with the outer surface top of the upper ejection body, the outer surface of the upper ejection body is connected with the inner surface of the differential top casing, the outer surface bottom of the differential top casing is connected with the outer surface top of the outer casing, the outer surface bottom of the outer casing is connected with the outer surface top of the differential housing, the inner part of the differential housing is connected with the outer surface of the clamping body, and the outer surface top of the clamping body, the right side of the outer surface of the workpiece is connected with the left side of the outer surface of the communicating body, the top of the right side of the outer surface of the differential case is connected with the outer surface of the tightening screw, and the right side of the outer surface of the communicating body is fixedly connected with the left side of the outer surface of the clamping body.
Preferably, the inner part of the outer surface of the clamp body is connected with the top of the outer surface of the clamp body, and the inner surface of the clamp body is connected with the outer surface of the fastening bolt.
Preferably, the top of the outer surface of the standard hydraulic chuck is connected with the bottom of the outer surface of the top plate, and the top of the outer surface of the top plate is connected with the outer surface of the locking screw.
Preferably, the top of the outer surface of the clamping body is connected with the inner surface of the outer ferrule, and the top of the outer surface of the upper top body is connected with the bottom of the outer surface of the connecting body.
Preferably, the bottom of the outer surface of the movable body is connected with the top of the outer surface of the pressing body, and the bottom of the outer surface of the pressing body is connected with one side of the connecting body.
Preferably, the number of the clamp bodies is two, and the specifications of the two clamp bodies are the same.
(III) advantageous effects
Compared with the prior art, the invention provides a high-precision double-layer self-centering clamping fixture, which has the following beneficial effects:
the invention mainly comprises a standard hydraulic chuck and a special clamping jaw, and is suitable for processing and producing rotary parts in the field of machining. The double-layer self-centering clamping fixture realizes auxiliary clamping and main clamping on the same whole, at the moment of the clamping process, the auxiliary clamping is stressed in advance, and then the main clamping is stressed, so that two-point one-line long-distance clamping is formed, the auxiliary clamping part has elasticity, and micro back-pulling is generated while clamping, so that the axial positioning of a workpiece can be more closely attached, and the clamping rigidity and precision are greatly improved. The repeated positioning precision can reach < 0.005 mm. The invention realizes double-layer part clamping by single action, forms two-point one-line clamping and realizes high-precision positioning. The double-top finish turning process of the lathe can be saved. The invention can be applied to the machining of small-sized rotary shells and stepped shaft parts.
At present, the turning machining precision of a common clamp of domestic and foreign clamp manufacturers only promises 0.02mm, the turning machining precision of the invention reaches within 0.01mm, and the repeated positioning precision is within 0.005 mm.
The outer ring, the workpiece, the differential top shell, the connecting body, the locking screw, the top disc, the movable body, the pressing body and other structures are matched with one another for use, so that the whole structure can be used for conveniently clamping the workpiece in use, the whole structure can be firmer in processing, the workpiece can be processed conveniently, and the operation is convenient.
The upper top body, the fastening bolt, the communicating body, the clamp body, the clamping body, the tightening screw, the differential shell, the clamping body, the outer shell and other structures are matched with each other for use, so that the device is convenient for operators to use during use, and can be conveniently installed and detached, and therefore, the device is more practical and convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a front view portion of fig. 1 according to the present invention.
In the figure: 1 standard hydraulic chuck, 2 clamping mechanisms, 201 upper top body, 202 fastening bolt, 203 communicating body, 204 clamping body, 205 clamping body, 206 tightening screw, 207 differential shell, 208 clamping body, 209 outer shell, 210 outer ring, 211 workpiece, 212 differential top shell, 213 connecting body, 214 locking screw, 215 top disc, 216 movable body, 217 pressing body.
Detailed Description
Referring to fig. 1-2, the high-precision double-layer self-centering clamping fixture comprises a standard hydraulic chuck 1 and a clamping mechanism 2, wherein the clamping mechanism 2 comprises an upper top body 201, a fastening bolt 202, a communicating body 203, a clamp body 204, a clamping body 205, a tightening screw 206, a differential housing 207, a clamping body 208, an outer casing 209, an outer collar 210, a workpiece 211, a differential top casing 212, a connecting body 213, a locking screw 214, a top disc 215, a movable body 216 and a pressing body 217, the standard hydraulic chuck 1 is internally provided with the movable body 216, the bottom of the outer surface of the standard hydraulic chuck 1 is movably connected with the top of the outer surface of the upper top body 201, the outer surface of the upper top body 201 is sleeved with the inner surface of the differential top casing 212, the bottom of the outer surface of the differential top casing 212 is welded with the top of the outer surface of the outer casing 209, the bottom of the outer surface of the outer casing 209 is welded with the top of the outer surface of, the top of the outer surface of the clamping body 208 is overlapped with the bottom of the outer surface of the workpiece 211, the right side of the outer surface of the workpiece 211 is overlapped with the left side of the outer surface of the communicating body 203, the top of the right side of the outer surface of the differential case 207 is inserted with the outer surface of the tightening screw 206, the right side of the outer surface of the communicating body 203 is fixedly connected with the left side of the outer surface of the clamping body 205, the inner part of the outer surface of the clamping body 205 is inserted with the top of the outer surface of the clamp body 204, the inner surface of the clamp body 204 is in threaded connection with the outer surface of the tightening bolt 202, the top of the outer surface of the standard hydraulic chuck 1 is clamped with the bottom of the outer surface of the top plate 215, the top of the outer surface of the top plate 215 is inserted with the outer surface of the locking screw 214, the top of the outer surface of the clamping body 208 is, the bottom of the outer surface of the pressing body 217 is movably connected with one side of the connecting body 213, the number of the clamp bodies 204 is two, the specifications of the two clamp bodies 204 are the same, the high-precision double-layer self-centering clamping fixture can better clamp the workpiece 211 through the mutual matching of the structures such as the outer ring 210, the workpiece 211, the differential top shell 212, the connecting body 213, the locking screw 214, the top disc 215, the movable body 216 and the pressing body 217, so that the whole structure is firmer during the use, the processing of the workpiece is more firm during the processing, and the operation is convenient, therefore, the device can achieve the purpose of tightening the workpiece clamp through the mutual matching of the structures such as the upper top body 201, the fastening bolt 202, the communicating body 203, the clamp bodies 204, the clamping bodies 205, the tightening screw 206, the differential shell 207, the clamping body 208 and the outer casing 209, so that the device is convenient for the operator to use when in use, and the device is also convenient to mount and dismount, so that the device is more practical and convenient.
At present, the turning machining precision of a common clamp of domestic and foreign clamp manufacturers only promises 0.02mm, and the turning machining precision of the clamp of the invention reaches within 0.01mm, and the repeated positioning precision is within 0.005 mm. The invention mainly comprises a standard hydraulic chuck and a special clamping jaw, and is suitable for processing and producing rotary parts in the field of machining. The double-layer self-centering clamping fixture realizes auxiliary clamping and main clamping on the same whole, at the moment of the clamping process, the auxiliary clamping is stressed in advance, and then the main clamping is stressed, so that two-point one-line long-distance clamping is formed, the auxiliary clamping part has elasticity, and micro back-pulling is generated while clamping, so that the axial positioning of a workpiece can be more closely attached, and the clamping rigidity and precision are greatly improved. The repeated positioning precision can reach < 0.005 mm. The invention realizes double-layer part clamping by single action, forms two-point one-line clamping and realizes high-precision positioning. The double-top finish turning process of the lathe can be saved. The invention can be applied to the machining of small-sized rotary shells and stepped shaft parts.
A clamping method is characterized in that a differential case 207 is clamped through a high-precision double-layer self-centering clamping fixture, the differential case is clamped through two positions, one clamping position is just pulled for clamping, the other clamping position is elastic for clamping, and when the differential case is used, one clamping position is firstly used for clamping operation, and then the other clamping position is used for adjusting and clamping operation.
In conclusion, the high-precision double-layer self-centering clamping fixture is characterized in that the outer ring 210, the workpiece 211, the differential top shell 212, the connecting body 213, the locking screw 214, the top disc 215, the movable body 216, the pressing body 217 and other structures are matched with one another, so that the whole structure can be better used for conveniently clamping the workpiece 211 in use, the workpiece 211 can be firmer in processing, the processing of the workpiece is facilitated, and the operation is facilitated, therefore, the device can achieve the purpose of making the workpiece clamp tighter, and the use of operators can be facilitated in use by matching the upper top body 201, the fastening bolt 202, the communicating body 203, the clamp body 204, the clamp body 205, the tightening screw 206, the differential shell 207, the clamp body 208, the outer shell 209 and other structures with one another, and the installation and the disassembly are facilitated, so that, the device is more practical and convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a double-deck self-centering clamping jig of high accuracy, includes standard hydraulic chuck (1) and clamping mechanism (2), its characterized in that: the clamping mechanism (2) comprises an upper top body (201), a fastening bolt (202), a communicating body (203), a clamp body (204), a first clamping body (205), a tightening screw (206), a differential shell (207), a second clamping body (208), an outer casing (209), an outer ring (210), a differential top shell (212), a connecting body (213), a locking screw (214), a top disc (215), a movable body (216) and a pressing body (217), wherein the movable body (216) is arranged inside the standard hydraulic chuck (1), the bottom of the outer surface of the standard hydraulic chuck (1) is connected with the top of the outer surface of the upper top body (201), the outer surface of the upper top body (201) is connected with the inner surface of the differential top shell (212), the bottom of the outer surface of the differential top shell (212) is connected with the top of the outer casing (209), and the bottom of the outer surface of the outer casing (209) is connected with the top of the outer surface of the differential shell (207), the inside of the differential case (207) is connected with the outer surface of the second clamping body (208), the top of the outer surface of the second clamping body (208) is used for overlapping the bottom of the outer surface of a workpiece (211), the right side of the outer surface of the workpiece (211) is used for being connected with the left side of the outer surface of the communicating body (203), the top of the right side of the outer surface of the differential case (207) is connected with the outer surface of a tightening screw (206), and the right side of the outer surface of the communicating body (203) is fixedly connected with the left side of the outer surface of the first clamping body (205).
2. The high-precision double-layer self-centering clamping fixture of claim 1, wherein: the inner part of the first clamping body (205) is connected with the top of the outer surface of the first clamping body (204), and the inner surface of the first clamping body (204) is connected with the outer surface of the fastening bolt (202).
3. The high-precision double-layer self-centering clamping fixture of claim 1, wherein: the top of the outer surface of the standard hydraulic chuck (1) is connected with the bottom of the outer surface of the top disc (215), and the top of the outer surface of the top disc (215) is connected with the outer surface of the locking screw (214).
4. The high-precision double-layer self-centering clamping fixture of claim 1, wherein: the top of the outer surface of the second clamping body (208) is connected with the inner surface of the outer ring (210), and the top of the outer surface of the upper top body (201) is connected with the bottom of the outer surface of the connecting body (213).
5. The high-precision double-layer self-centering clamping fixture of claim 1, wherein: the bottom of the outer surface of the movable body (216) is connected with the top of the outer surface of the pressing body (217), and the bottom of the outer surface of the pressing body (217) is connected with one side of the connecting body (213).
6. The high-precision double-layer self-centering clamping fixture of claim 1, wherein: the number of the clamp bodies (204) is two, and the specifications of the two clamp bodies (204) are the same.
CN201911373819.1A 2019-11-22 2019-12-27 High-precision double-layer self-centering clamping fixture and clamping method Active CN111002079B (en)

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CN201911156730 2019-11-22
CN201911156730X 2019-11-22

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CN111002079B true CN111002079B (en) 2020-08-18

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Citations (11)

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US5494303A (en) * 1995-03-07 1996-02-27 Royal Machine And Tool Corporation Self-centering indexing chuck
CN2741715Y (en) * 2004-12-02 2005-11-23 常州工业技术学院机电研究所 Self contering clamp device for digital control cardan joint bell shell inner ball surface grinder
CN201815710U (en) * 2010-07-06 2011-05-04 重庆迈崴机器有限公司 Processing tooling of differential shell auger cross hole
CN202037471U (en) * 2011-04-27 2011-11-16 浙江联强数控机床股份有限公司 Self-centering clamping mechanism of work piece
CN203738420U (en) * 2014-02-27 2014-07-30 杭州钰友精密机械有限公司 Clamp for finish turning of spherical face of differential mechanism shell inner hole
CN104259910A (en) * 2014-09-29 2015-01-07 常州南车汽车零部件有限公司 Floating vehicle fixture for differential shell and clamping method
CN204843029U (en) * 2015-05-25 2015-12-09 赵秋实 Automotive differential casing processingequipment
CN205519739U (en) * 2016-02-02 2016-08-31 天津市威斯曼光学仪器有限公司 Make distention related to heart centre of force axle lathe work device by oneself
CN108581520A (en) * 2018-04-12 2018-09-28 宁波海天精工股份有限公司 A kind of hydraulic pump end cap processing self-centering hydraulic pressure fixture
CN109128948A (en) * 2018-10-24 2019-01-04 上海工程技术大学 A kind of car engine balance shaft production fixture
CN208644115U (en) * 2018-06-25 2019-03-26 重庆市永和直锥齿有限公司 A kind of fixture for differential mechanism production

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* Cited by examiner, † Cited by third party
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JP2005007534A (en) * 2003-06-19 2005-01-13 Nippei Toyama Corp Work machining device, and work machining method
CN108097993A (en) * 2017-12-22 2018-06-01 江西乾元机械制造有限公司 Differential carrier smart car frock

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5494303A (en) * 1995-03-07 1996-02-27 Royal Machine And Tool Corporation Self-centering indexing chuck
CN2741715Y (en) * 2004-12-02 2005-11-23 常州工业技术学院机电研究所 Self contering clamp device for digital control cardan joint bell shell inner ball surface grinder
CN201815710U (en) * 2010-07-06 2011-05-04 重庆迈崴机器有限公司 Processing tooling of differential shell auger cross hole
CN202037471U (en) * 2011-04-27 2011-11-16 浙江联强数控机床股份有限公司 Self-centering clamping mechanism of work piece
CN203738420U (en) * 2014-02-27 2014-07-30 杭州钰友精密机械有限公司 Clamp for finish turning of spherical face of differential mechanism shell inner hole
CN104259910A (en) * 2014-09-29 2015-01-07 常州南车汽车零部件有限公司 Floating vehicle fixture for differential shell and clamping method
CN204843029U (en) * 2015-05-25 2015-12-09 赵秋实 Automotive differential casing processingequipment
CN205519739U (en) * 2016-02-02 2016-08-31 天津市威斯曼光学仪器有限公司 Make distention related to heart centre of force axle lathe work device by oneself
CN108581520A (en) * 2018-04-12 2018-09-28 宁波海天精工股份有限公司 A kind of hydraulic pump end cap processing self-centering hydraulic pressure fixture
CN208644115U (en) * 2018-06-25 2019-03-26 重庆市永和直锥齿有限公司 A kind of fixture for differential mechanism production
CN109128948A (en) * 2018-10-24 2019-01-04 上海工程技术大学 A kind of car engine balance shaft production fixture

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