CN103962598B - The automatic expansion core fixture of thin-walled tube kind part - Google Patents

The automatic expansion core fixture of thin-walled tube kind part Download PDF

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Publication number
CN103962598B
CN103962598B CN201410228591.8A CN201410228591A CN103962598B CN 103962598 B CN103962598 B CN 103962598B CN 201410228591 A CN201410228591 A CN 201410228591A CN 103962598 B CN103962598 B CN 103962598B
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CN
China
Prior art keywords
expansion
forms
axle
monolithic
mandrel
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CN201410228591.8A
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Chinese (zh)
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CN103962598A (en
Inventor
程绍杨
张长秋
谢宁
刘世然
孟子茹
刘敬
孙岳城
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CNNC Tianjin Machinery Co Ltd
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CNNC Tianjin Machinery Co Ltd
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Priority to CN201410228591.8A priority Critical patent/CN103962598B/en
Publication of CN103962598A publication Critical patent/CN103962598A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/40Expansion mandrels
    • B23B31/404Gripping the work or tool by jaws moving radially controlled by conical surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/40Expansion mandrels
    • B23B31/404Gripping the work or tool by jaws moving radially controlled by conical surfaces
    • B23B31/4053Gripping the work or tool by jaws moving radially controlled by conical surfaces using fluid-pressure means to actuate the gripping means
    • B23B31/406Gripping the work or tool by jaws moving radially controlled by conical surfaces using fluid-pressure means to actuate the gripping means using mechanical transmission through the spindle

Abstract

The invention discloses the automatic expansion core fixture of a kind of thin-walled tube kind part, comprise the cylindric expansion set that the mandrel that is made up of fixed part, limiting section and awl shaft and inwall form tapering; Expansion set blind end forms through hole, and two ends outer wall forms groove, and back-up ring is installed in groove; Connecting axle stretches into the central through hole of mandrel and expansion set, and one end is connected with piston rod, and the one end being placed in expansion set outside forms flange, forms defining flange near the position of expansion set blind end medial surface; The outer wall of the corresponding screw hole of connecting axle forms axial keyway; Screw is installed in screw hole and one end and stretches in keyway.The present invention adopts hydraulic pressure as power source, reduces labor intensity further and raises labour productivity; Fixture is directly connected with machine tool chief axis by screw, ensure that the rotating accuracy of fixture; The integrated design of fixture, substantially increases reasonability and the reliability of clamp structure.

Description

The automatic expansion core fixture of thin-walled tube kind part
Technical field
The invention belongs to a kind of jig, be specifically related to the automatic expansion core turning clamp of a kind of thin-walled tube kind part.
Background technology
At present, the turning clamp of thin-walled tube kind part, main hand clamping and the automatic expansion core of separate type of adopting clamps two kinds.Hand clamping device, its shortcoming is that operator's labour intensity is large, and labor productivity is low; The automatic expansion core fixture of separate type, installs more complicated, installs after terminating and needs to carry out turnery processing to its cylindrical, to ensure axiality requirement.Automatic expanding core type turning clamp then solves the problems such as labour intensity is large, productivity ratio is low, installation is complicated.
Summary of the invention
The present invention proposes to overcome the shortcoming existed in prior art, its objective is and provides a kind of thin-walled tube kind part automatic expansion core fixture.
Technical scheme of the present invention is:
The automatic expansion core fixture of a kind of thin-walled tube kind part, comprise the mandrel, connecting axle and the expansion set that form central through hole, described mandrel is made up of fixed part, limiting section and awl shaft from left to right successively, one end formation flange of fixed part and the chuck of lathe are fixed, limiting section is formed radial locating hole, awl shaft is the circular cone shape that excircle wears tapering; Described connecting axle stretches into the central through hole of mandrel, and one end is connected with the piston rod thread of hydraulic pump, and the other end forms the shaft shoulder, and form the axle collar near one end of the shaft shoulder, described shaft shoulder outer circumference surface forms multiple uniform U-shaped breach; The outer wall of the corresponding limiting section locating hole of connecting axle forms an axial keyway; Described alignment pin is installed in locating hole and one end is stretched in keyway; Described expansion set is all identical and cross section is fan-shaped expansion set monolithic is fixed together by back-up ring and forms by multiple shape size, forms one end open, the other end closes and be formed centrally the cylinder-like structure matched with connecting axle external diameter in blind end; The outer wall at each expansion set monolithic two ends all forms groove, and described back-up ring is installed in the annular groove that is made up of the groove of multiple expansion set monolithic; One end of expansion set monolithic inwardly forms flange, and flange is placed between the axle collar and the shaft shoulder; The end face of expansion set monolithic near flange side forms cylindrical hole; Expansion set monolithic inner left wall forms tapering; Multiple straight pin is placed in the U-shaped breach of the shaft shoulder respectively, and the cylindrical hole of each expansion set monolithic is stretched in one end.
The external diameter of the described axle collar is less than the external diameter of the shaft shoulder.
The width of described flange and the distance between the axle collar and the shaft shoulder match.
The inwall of described expansion set is consistent with the awl shaft excircle tapering of mandrel and be slidably matched.
Fixed part and the limiting section of described mandrel are column type, and the external diameter of fixed part is greater than the external diameter of workpiece, the external diameter of limiting section and the internal diameter matched in clearance of workpiece.
The invention has the beneficial effects as follows:
The present invention adopts hydraulic pressure as power source, reduces labor intensity further and raises labour productivity; Fixture is directly connected with machine tool chief axis by screw, ensure that the rotating accuracy of fixture; The integrated design of fixture, substantially increases reasonability and the reliability of clamp structure.
Accompanying drawing explanation
Fig. 1 is the front view of the automatic expansion core fixture of thin-walled tube kind part of the present invention;
Fig. 2 is the right view of the automatic expansion core fixture of thin-walled tube kind part of the present invention;
Fig. 3 is the front view of connecting axle in the present invention;
Fig. 4 is the right view of connecting axle in the present invention
Fig. 5 is the profile of expansion set monolithic in the present invention;
Fig. 6 is the right view of expansion set monolithic in the present invention.
Wherein:
1 mandrel 11 fixed part
12 limiting section 13 awl shafts
14 locating hole 2 connecting axles
21 shaft shoulder 22 axle collars
23 keyway 24U type breach
3 expansion set 31 expansion set monolithics
32 groove 33 cylindrical holes
34 flange 4 alignment pins
5 back-up ring 6 straight pins
7 piston rod 8 workpiece
9 chucks.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the automatic expansion core fixture of thin-walled tube kind part of the present invention is described in detail:
As shown in Figure 1, the automatic expansion core fixture of a kind of thin-walled tube kind part, comprises the mandrel 1, connecting axle 2 and the expansion set 3 that form central through hole,
As shown in Figure 2,3, 4, described mandrel 1 is made up of fixed part 11, limiting section 12 and awl shaft 13 from left to right successively, one end of fixed part 11 forms flange and fixes with the chuck 9 of lathe, limiting section 12 is formed the locating hole 14 of radial direction, and awl shaft 13 wears the circular cone shape of tapering for excircle;
Described connecting axle 2 stretches into the central through hole of mandrel 1, and one end is threaded with the piston rod 7 of hydraulic pump, and the other end forms the shaft shoulder 21, and form the axle collar 22 near one end of the shaft shoulder 21, the described shaft shoulder 21 outer circumference surface forms multiple uniform U-shaped breach 24; The outer wall of connecting axle 2 corresponding limiting section 12 locating hole 14 forms an axial keyway 23;
Described alignment pin 4 is installed in locating hole 14 and one end is stretched in keyway 23;
As shown in Fig. 2,4,5,6, described expansion set 3 is all identical and cross section is fan-shaped expansion set monolithic 31 is fixed together by back-up ring 5 and forms by multiple (the present embodiment is 8) shape size, forms one end open, the other end closes and be formed centrally the cylinder-like structure matched with connecting axle 2 external diameter in blind end; The outer wall at each expansion set monolithic 31 two ends all forms groove 32, and described back-up ring 5 is installed in the annular groove that is made up of the groove 32 of multiple (the present embodiment is 8) expansion set monolithic 31; One end of expansion set monolithic 31 inwardly forms flange 34, and flange 34 is placed between the axle collar 22 and the shaft shoulder 21; The end face of expansion set monolithic 31 near flange 34 side forms cylindrical hole 33; Expansion set monolithic 31 inner left wall forms tapering;
Multiple (the present embodiment is 8) straight pin 6 is placed in the U-shaped breach 24 of the shaft shoulder 21 respectively, and the cylindrical hole 33 of each expansion set monolithic 31 is stretched in one end.
The external diameter of the described axle collar 22 is less than the external diameter of the shaft shoulder 21.
The width of described flange 34 and the distance between the axle collar 22 and the shaft shoulder 21 match.
The inwall of described expansion set 3 is consistent with the awl shaft 13 excircle tapering of mandrel 1 and be slidably matched.
Fixed part 11 and the limiting section 12 of described mandrel 1 are column type, and the external diameter of fixed part 11 is greater than the external diameter of workpiece 8, the external diameter of limiting section 12 and the internal diameter matched in clearance of workpiece 8.
Connecting axle 2 is formed with keyway 23, the alignment pin 4 that opposite position is provided with locating hole 14 and plays the role of positioning on the limiting section 12 of mandrel 1 simultaneously, to prevent the rotation of connecting axle 2; Expansion set 3 is fastened on mandrel 1 by back-up ring 5, to prevent expansion set 3 play.
Using method of the present invention:
The present invention take hydraulic pressure as power source, power set are hydraulic cylinder, the kinetic energy of piston rod 7 can be converted in being produced by hydraulic pressure, make piston rod 7 promote connecting axle 2 to move back and forth, thus make the expansion set 3 of band tapering have awl shaft 13 linear reciprocating motion of the mandrel 1 of the tapering that matches along with it, thus tensioner workpiece 8 inwall, the object reaching clamping and unclamp.
Hydraulic cylinder piston rod 7 pulls connecting axle 2 to left movement; Connecting axle 2 drives the expansion set 3 of band tapering to have the awl shaft 13 of the mandrel 1 of the tapering that matches to left movement along with it, impels expansion set 3 to expand, thus swelling workpiece 13; Move right when hydraulic cylinder piston rod 8 promotes connecting axle 2, connecting axle 2 drives the expansion set 3 of band tapering to have the awl shaft 13 of the mandrel 1 of the tapering that matches to move right along with it, and expansion set 3 restores to the original state, and tension force is eliminated, thus unclamps workpiece 8 inwall.

Claims (5)

1. the automatic expansion core fixture of thin-walled tube kind part, comprise the mandrel (1), connecting axle (2) and the expansion set (3) that form central through hole, it is characterized in that: described mandrel (1) is made up of fixed part (11), limiting section (12) and awl shaft (13) from left to right successively, one end formation flange of fixed part (11) and the chuck (9) of lathe are fixed, limiting section (12) is upper forms radial locating hole (14), and awl shaft (13) wears the circular cone shape of tapering for excircle; Described connecting axle (2) stretches into the central through hole of mandrel (1), one end is threaded with the piston rod (7) of hydraulic pump, the other end forms the shaft shoulder (21), form the axle collar (22) near one end of the shaft shoulder (21), the described shaft shoulder (21) outer circumference surface forms multiple uniform U-shaped breach (24); The outer wall of connecting axle (2) corresponding limiting section (12) locating hole (14) forms an axial keyway (23); Described alignment pin (4) is installed in locating hole (14) and one end is stretched in keyway (23); Described expansion set (3) is all identical and cross section is fan-shaped expansion set monolithic (31) is fixed together by back-up ring (5) and forms by multiple shape size, forms one end open, the other end is closed and is formed centrally the cylinder-like structure matched with connecting axle (2) external diameter in blind end; The outer wall at each expansion set monolithic (31) two ends all forms groove (32), and described back-up ring (5) is installed in the annular groove that is made up of the groove (32) of multiple expansion set monolithic (31); One end of expansion set monolithic (31) inwardly forms flange (34), and flange (34) is placed between the axle collar (22) and the shaft shoulder (21); The end face of expansion set monolithic (31) near flange (34) side forms cylindrical hole (33); Expansion set monolithic (31) inner left wall forms tapering; Multiple straight pin (6) is placed in the U-shaped breach (24) of the shaft shoulder (21) respectively, and the cylindrical hole (33) of each expansion set monolithic (31) is stretched in one end.
2. the automatic expansion core fixture of a kind of thin-walled tube kind part according to claim 1, is characterized in that: the external diameter of the described axle collar (22) is less than the external diameter of the shaft shoulder (21).
3. the automatic expansion core fixture of a kind of thin-walled tube kind part according to claim 1, is characterized in that: the width of described flange (34) and the distance between the axle collar (22) and the shaft shoulder (21) match.
4. the automatic expansion core fixture of a kind of thin-walled tube kind part according to claim 1, is characterized in that: the inwall of described expansion set (3) is consistent with awl shaft (13) the excircle tapering of mandrel (1) and be slidably matched.
5. the automatic expansion core fixture of a kind of thin-walled tube kind part according to claim 1, it is characterized in that: fixed part (11) and the limiting section (12) of described mandrel (1) are column type, the external diameter of fixed part (11) is greater than the external diameter of workpiece (8), the external diameter of limiting section (12) and the internal diameter matched in clearance of workpiece (8).
CN201410228591.8A 2014-05-28 2014-05-28 The automatic expansion core fixture of thin-walled tube kind part Active CN103962598B (en)

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CN104209774A (en) * 2014-08-20 2014-12-17 平湖市斯迈克机械制造有限公司 Pipe outer circle rough machining tool for machine tool
CN104511776B (en) * 2014-12-02 2017-02-22 重庆秦安机电股份有限公司 End face milling fixture for suspension convex platform at left side and right side of engine cylinder
CN104440547A (en) * 2014-12-10 2015-03-25 重庆宜居门业有限公司 Clamping device for columnar leg cylindrical grinding
CN104626250B (en) * 2014-12-30 2016-03-02 山东太阳纸业股份有限公司 A kind of refill chuck
CN104858464A (en) * 2015-06-10 2015-08-26 山东技师学院 Hydraulic expansion tire for numerical control machine tool
CN105149631A (en) * 2015-10-26 2015-12-16 重庆市银钢一通科技有限公司 Machine tool and clamp thereof
CN106808242A (en) * 2016-12-13 2017-06-09 嘉兴新维液压缸有限公司 Internal expanding external-compression type oil cylinder fixture
EP3412388B1 (en) * 2017-06-07 2019-10-30 Hainbuch GmbH Spannende Technik Internal clamping means with secure clamping segment ring
CN107218912B (en) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 Three-coordinate measuring machine and measuring method based on expandable support intracavity type positioning
CN107202562B (en) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 Three-coordinate measuring machine and measuring method based on multi-point support intracavity type positioning
CN107186653B (en) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 Multi-point support inner cavity type cylindrical part positioning device and positioning method
CN107246856B (en) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 Positioning device and positioning method for expandable support inner cavity type cylindrical part
CN108296725B (en) * 2018-04-16 2020-04-28 杭州吉利机械有限公司 Split type differential mechanism shell inner expansion processing method
CN108723569B (en) * 2018-05-29 2020-10-30 南京六和普什机械有限公司 Welding equipment and method for welding automobile parts
CN109277590B (en) * 2018-10-08 2021-01-08 广州市昊志机电股份有限公司 Mandrel clamp and mounting chuck
CN111014746B (en) * 2019-12-25 2021-08-10 保定向阳航空精密机械有限公司 Internal hydraulic floating expansion sleeve
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