CN201519882U - Processing device of shaft and pipe workpieces under tightening states - Google Patents
Processing device of shaft and pipe workpieces under tightening states Download PDFInfo
- Publication number
- CN201519882U CN201519882U CN2009202693771U CN200920269377U CN201519882U CN 201519882 U CN201519882 U CN 201519882U CN 2009202693771 U CN2009202693771 U CN 2009202693771U CN 200920269377 U CN200920269377 U CN 200920269377U CN 201519882 U CN201519882 U CN 201519882U
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- chuck
- hydraulic cylinder
- piston rod
- piston
- floating
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Abstract
The utility model provides a processing device of shaft and pipe workpieces under tightening states. The processing device comprises a floating chuck mounted on the front end of a machine shaft of a machine tool and a tightening device mounted on the tail portion of the machine tool, a floating chuck is further mounted on the tightening device consisting of a hydraulic cylinder, a bearing seat, a bearing, a chuck seat and a chassis, the floating chuck is mounted on the chuck seat, a through hole is arranged in the piston rod, a draw rod of the floating chuck on the chuck seat is extended outside from the through hole of the piston rod, the rear projecting end of the piston rod is provided with the hydraulic cylinder, the piston in the hydraulic cylinder is further provided with an inner through hole, the draw rod of the floating chuck on the chuck seat extends into the piston through hole of the hydraulic cylinder, and the draw rod is connected with the piston together through a front thrust bearing and a rear thrust bearing. The processing device can guarantee to adopt the same positioning reference during multiple working position processing, simultaneously processes workpieces under the tightening state, improves the rigidity when processing the workpieces, leads the workpieces to have an expanded trend in the axial direction, and can effectively improve processing efficiency.
Description
Technical field
The utility model relates to the processing unit (plant) of a kind of class and tubing workpiece, belongs to the outer surface processing technique field of a class and tubing workpiece.
Background technology
At present on lathe when processing thin and long shafts and pipe part, usually adopt a folder one top, be that the lathe head of a bed one end adopts chuck to clamp, tailstock one end adopts the top mode that holds out against, this processing mode is when holding out against, the bad control of pressure, power is excessive easily with the workpiece bending, power is too small, workpiece is inaccurate in radial location, and in process,, cause the workpiece elongation to discharge and bend, and the dimensional tolerance of processing back workpiece and form and position tolerance are not easy to guarantee because temperature raises.
Chinese patent literature CN201186355 discloses a kind of " frock clamp that is used for flexible major axis processing ", comprise lathe spindle chuck, tailstock clamping chuck, screw thread lever pin and locking nut, need in advance at the end of flexible major axis thread mill drilling, by the screw thread lever pin flexible major axis is clamped on tailstock clamping chuck and the lathe spindle chuck, tailstock clamping chuck and lathe spindle chuck apply pulling force to the flexible major axis of clamping all the time.This frock clamp makes the turning under tension of flexible major axis, though can improve machining accuracy, but the tension of flexible major axis is the tail stock that leans on manpower that tailstock clamping chuck will be installed passes realization backward, fix lathe tailstock again, do not apply the device of tightening force, tightening force is uncontrollable, can not make flexible major axis really be in tension, in process, also can't realize floating of tightening force, can not effectively reduce form and position tolerances such as workpiece circular runout and circularity.
Also there is another weak point in above-mentioned Chinese patent literature CN201186355 disclosed " frock clamp that is used for flexible major axis processing ", the two ends that are exactly workpiece all adopt the chuck location to clamp, when workpiece need change device type, add man-hour as move on to grinding machine or the grinding machine bed of changing trains or buses by lathe turning, the position of twice clamping will change, that is to say that twice clamping is not same location benchmark, can not effectively reduce form and position tolerances such as workpiece circular runout and circularity equally.
As everyone knows, come working shaft-like workpiece, can guarantee that the workpiece multiple clamping adopts same location benchmark, can effectively improve location and machining accuracy by the centre bore location at workpiece two ends and by two top clampings.As Chinese patent literature CN1994666A disclosed " a kind of clamp method of axial workpiece ", it is the distance of measuring two ends under the workpiece free state earlier, again workpiece is withstood on two top between, one of them is contained on the rolling center seat, ring flange is loaded onto at the workpiece two ends, screw with nut respectively, make top and the applying of workpiece centre hole, the distance at measuring workpieces two ends, and with free state under compare, adjust the position of rolling center seat, consistent under the distance that makes the workpiece two ends and the free state, fixedly rolling center gets final product processing work.This method complicated operation does not provide under distance that the position which kind of technological means to adjust the rolling center seat by makes the workpiece two ends and the free state consistent yet.Workpiece is not processed under tension yet, can not offset the workpiece deformation that cutting force, thermal expansion force etc. cause in the process.
When needs are accurately located workpiece, when clamping by chuck again, can adopt floating chuck.Floating chuck is mainly used in the blank of irregular band draw taper, can install in the chuck mesopore top so that workpiece is accurately located.The key property of chuck is that clamping force is big, when clamping workpiece is pulled back, and workpiece end face is abutted against on the locating surface of chuck; Claw can single float, and is can clamping irregular and with the blank of little gradient.As Chinese patent literature CN2154143 disclosed " a kind of top formula floating chuck ", comprise chuck body and three-jaw, three-jaw in the chuck body can rotate around alignment pin, top being slidingly mounted in the chuck body front end arranged, pull bar is arranged in the chuck body, be set with upper and lower two buoyancy body on the pull bar, have spring to make three-jaw and following buoyancy body keep the conical surface to contact in the chuck body.Can accurately locate again when floating chuck can be realized workpiece clamped, but need the pulling of intermediate draw bar, therefore can't realize the processing of workpiece under tension.
Comprehensive prior art, make shaft-like workpiece not only be subjected to top roof pressure power but also processed down by the state of tightening force by two top being positioned at, be the key that improves the workpiece machining accuracy, but in practical application, have certain technical difficulty, still find no the report of this respect technology at present.
Summary of the invention
The utility model is at the deficiency that existing axle class and tubing workpiece process technology exist, and provides a kind of multistation to add processing unit (plant) under accurate positioning in man-hour, the axle class that can effectively guarantee machining accuracy and the tubing workpiece tension.
Processing unit (plant) under axle class of the present utility model and the tubing workpiece tension adopts following technical solution:
This device comprises the floating chuck that is installed in the machine tool chief axis front end and is installed in the take-up device of lathe afterbody, floating chuck also is installed on this take-up device, described take-up device comprises hydraulic cylinder, bearing block, bearing, chuck seat and base, hydraulic cylinder is installed on the base, be provided with piston rod in the hydraulic cylinder, the front and back end of hydraulic cylinder is stretched out at the two ends of piston rod respectively, be provided with the radial location device of piston rod between the inwall of piston rod and hydraulic cylinder, the preceding external part of piston rod is equipped with bearing block, bearing is installed on the bearing block, the dish seat is installed on the bearing, floating chuck is installed on the chuck seat, piston rod inside is provided with through hole, the pull bar of floating chuck is stretched out by the through hole of piston rod on the chuck seat, and the back external part of piston rod is equipped with a hydraulic cylinder, and the piston in this hydraulic cylinder also is provided with interior bone, the pull bar of floating chuck stretches into the piston hole of this hydraulic cylinder on the chuck seat, and pull bar links together by former and later two thrust bearings and piston.
When said apparatus is used, workpiece is by the top location on two floating chucks, make the rear end of back floating chuck clamping work pieces then by the pull bar of floating chuck after the Driven by Hydraulic Cylinder at take-up device rear portion, restart take-up device, make the tension backward together of back floating chuck and workpiece, make workpiece be in tension.Because the effect of thrust bearing, the pull bar of back floating chuck, workpiece and back floating chuck can rotate together.
Top in the floating chuck adopted various versions such as top, the live center of floating.
The utility model adopts the positioning and clamping mode that the workpiece two ends are withstood, can guarantee that multistation adds adopts same location benchmark man-hour, while processing work under tension, make workpiece that the trend of elongation be arranged at axial direction, can discharge the distortion that workpiece causes because of cutting force, thermal expansion force etc. at any time in process, when strengthening the workpiece rigidity, can not cause the bounce-back of processing back precision again, can effectively reduce form and position tolerances such as the circular runout of workpiece and circularity, improve machining accuracy.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Wherein: 1, back floating chuck, 2, top, 3, chuck seat, 4, bearing, 5, bearing block, 6, drive end bearing bracket, 7, back floating chuck pull bar, 8, hydraulic cylinder, 9, piston rod, 10, alignment pin, 11, base, 12, rear end cap, 13, shaft-like workpiece, 14, preceding floating chuck pull bar, 15, preceding floating chuck, 16, terminal pad, 17, left end cap, 18, piston, 19, thrust bearing, 20, cylinder body, 21, right end cap.
The specific embodiment
As shown in Figure 1, device of the present utility model comprises preceding floating chuck 15 that is installed in the machine tool chief axis front end and the take-up device that is installed in the lathe afterbody, and back floating chuck 1 is installed on this take-up device.Preceding floating chuck 15 is installed on the machine tool chief axis, logical angling cylinder (not shown) in the rear end of machine tool chief axis is equipped with, the pull bar 14 of preceding floating chuck is connected with the piston of this angling cylinder, floating chuck 15 clamping work pieces before the pulling of the pull bar 14 of floating chuck before under the drive of this angling cylinder, in logical angling cylinder, preceding floating chuck 15 and shaft-like workpiece 13 rotate with the lathe main shaft.
Described take-up device adopts the hydraulic-driven structure, comprise hydraulic cylinder 8, bearing block 5, bearing 4, chuck seat 3 and base 11, hydraulic cylinder 8 is installed on the base 11, the polycrystalline substance of base 11 is the same with tail stock, and it is moving and mobile the same with fixed form on lathe of fixed form and tail stock on the lathe.Be provided with piston rod 9 in the hydraulic cylinder 8, the drive end bearing bracket 6 and the drive end bearing bracket 12 of hydraulic cylinder 8 stretched out at the two ends of piston rod 9 respectively, be provided with sealing ring between the inboard wall of cylinder block of piston rod 9 and hydraulic cylinder 8, the drive end bearing bracket 6 and piston rod 9 contact positions of hydraulic cylinder 8 are provided with sealing ring and dust ring, also are provided with sealing ring between the rear end cap 12 of hydraulic cylinder 8 and the inboard wall of cylinder block of hydraulic cylinder 8.The front and rear part of hydraulic cylinder 8 is provided with oil inlet and outlet respectively, is connected with hydraulic control system, and hydraulic control system is existing routine techniques.The preceding external part of piston rod 9 is equipped with bearing block 5, and bearing block 5 and piston rod 9 are connected by key, and by the back-up ring axial restraint.Bearing 4 is installed on the bearing block 5, and bearing 4 adopts to have axially high and the YRT turntable bearing of bearing capacity radially, and the YRT turntable shaft is contracted and drawn together a seat ring and a blowout patche, and seat ring is connected with bearing block 5 by screw, and blowout patche is connected with chuck seat 3 by screw.Back floating chuck 1 is installed on the chuck seat 3 by bolt.The effect of take-up device is to drive back floating chuck 1 to move axially, and piston rod 9 can only move axially and can not rotate.In order to prevent piston rod 9 floating chuck 1 rotation subsequently, on piston rod 9, process axial groove, alignment pin 10 is installed on the inboard wall of cylinder block of hydraulic cylinder 8, and alignment pin 10 cooperates with axial groove on the piston rod 9, has guaranteed that piston rod 9 can only move axially and can not rotate.Alignment pin 10 can adopt T type key.The inside of the piston rod 9 of hydraulic cylinder 8 is band through holes, and stretches out the rear end cap 12 of hydraulic cylinder 8, and the pull bar 7 of back floating chuck 1 stretches out the endoporus of piston rod 9.The rear end of piston rod 9 is equipped with terminal pad 16, and the hydraulic cylinder of being made up of left end cap 17, cylinder body 20, piston 18 and right end cap 21 is installed on the terminal pad 16, is equipped with thrust bearing 19 between the two ends of piston 18 and the back floating chuck pull bar 7.In two floating chucks top 2 can be also can floating of fixing.
The two ends of shaft-like workpiece 13 be installed in before floating chuck 15 and the back floating chuck 1 top 2 between, by the top location of two floating chucks.Pull bar 7 by floating chuck after the Driven by Hydraulic Cylinder of being made up of left end cap 17, cylinder body 20, piston 18 and right end cap 21 makes back floating chuck 1 clamp the rear end of shaft-like workpiece 13 then.Restart take-up device, make the tension backward together of back floating chuck 1, the top and shaft-like workpiece 13 on it, make shaft-like workpiece 13 be in tension.Because the effect of thrust bearing 19, back floating chuck 1, shaft-like workpiece 13 and back floating chuck pull bar 7 can rotate together.
During processing tubing workpiece, the two ends predetermined fixed mounting process head with the tubing workpiece has centre bore on the outer face of technique head.Add man-hour, with the technique head clamping at tubing workpiece two ends preceding floating chuck 15 and back floating chuck 1 top 2 between.Other process is the same with working shaft-like workpiece.
Claims (1)
1. the processing unit (plant) under axle class and the tubing workpiece tension, comprise floating chuck that is installed in the machine tool chief axis front end and the take-up device that is installed in the lathe afterbody, floating chuck also is installed on this take-up device, it is characterized in that: described take-up device comprises hydraulic cylinder, bearing block, bearing, chuck seat and base, hydraulic cylinder is installed on the base, be provided with piston rod in the hydraulic cylinder, the front and back end of hydraulic cylinder is stretched out at the two ends of piston rod respectively, be provided with the radial location device of piston rod between the inwall of piston rod and hydraulic cylinder, the preceding external part of piston rod is equipped with bearing block, bearing is installed on the bearing block, the dish seat is installed on the bearing, floating chuck is installed on the chuck seat, piston rod inside is provided with through hole, the pull bar of floating chuck is stretched out by the through hole of piston rod on the chuck seat, the back external part of piston rod is equipped with a hydraulic cylinder, piston in this hydraulic cylinder also is provided with interior bone, the pull bar of floating chuck stretches into the piston hole of this hydraulic cylinder on the chuck seat, and pull bar links together by former and later two thrust bearings and piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202693771U CN201519882U (en) | 2009-11-06 | 2009-11-06 | Processing device of shaft and pipe workpieces under tightening states |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202693771U CN201519882U (en) | 2009-11-06 | 2009-11-06 | Processing device of shaft and pipe workpieces under tightening states |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201519882U true CN201519882U (en) | 2010-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202693771U Expired - Fee Related CN201519882U (en) | 2009-11-06 | 2009-11-06 | Processing device of shaft and pipe workpieces under tightening states |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201519882U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975036A (en) * | 2012-10-31 | 2013-03-20 | 湖南孟卿工程机械有限公司 | Building hoist stand column port cutting fixture and machining method of stand column port |
| CN104440336A (en) * | 2014-12-13 | 2015-03-25 | 遵义金惠机械制造有限责任公司 | Tensioning clamp of elongated shaft |
| CN106607783A (en) * | 2015-10-27 | 2017-05-03 | 核动力运行研究所 | Heat exchanger tubesheet checking locating toe structure |
| CN106965088A (en) * | 2017-04-27 | 2017-07-21 | 山东工商学院 | Mill rotor groove fixture |
-
2009
- 2009-11-06 CN CN2009202693771U patent/CN201519882U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975036A (en) * | 2012-10-31 | 2013-03-20 | 湖南孟卿工程机械有限公司 | Building hoist stand column port cutting fixture and machining method of stand column port |
| CN104440336A (en) * | 2014-12-13 | 2015-03-25 | 遵义金惠机械制造有限责任公司 | Tensioning clamp of elongated shaft |
| CN104440336B (en) * | 2014-12-13 | 2016-08-31 | 遵义金惠机械制造有限责任公司 | The stretching device of slender axles |
| CN106607783A (en) * | 2015-10-27 | 2017-05-03 | 核动力运行研究所 | Heat exchanger tubesheet checking locating toe structure |
| CN106965088A (en) * | 2017-04-27 | 2017-07-21 | 山东工商学院 | Mill rotor groove fixture |
| CN106965088B (en) * | 2017-04-27 | 2018-09-14 | 山东工商学院 | Mill rotor slot fixture |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhao Xianhua Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhao Xianhua Document name: Notification of Termination of Patent Right |
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| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20181106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |