CN101623767A - Device for heightening machining rigid and machining precision of shaft type work piece and tube type work piece - Google Patents
Device for heightening machining rigid and machining precision of shaft type work piece and tube type work piece Download PDFInfo
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- CN101623767A CN101623767A CN200910017594A CN200910017594A CN101623767A CN 101623767 A CN101623767 A CN 101623767A CN 200910017594 A CN200910017594 A CN 200910017594A CN 200910017594 A CN200910017594 A CN 200910017594A CN 101623767 A CN101623767 A CN 101623767A
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Abstract
The invention provides a device for heightening the machining rigid and the machining precision of a shaft type work piece and a tube type work piece. The device comprises a clamping pan installed on the main shaft of a lathe and a tension device installed at the tail of the lathe. The tension device is also provided with a clamping pan; the two clamping pans are oppositely installed; the axes of the two clamping pans are positioned on the same direct line. The tension device can use a hydraulic pressure driving structure and a spiral move mechanism. The device has exact positioning, adopts the mode that two ends are tightly clamped by the clamping pans, leads the work piece to be machined under a tension status, leads the work piece to have an extending trend on an axial direction, leads tension force to change along with the change of cutting force, increases the rigidity of the work piece, leads the precision of the machined work piece not to be rebounded, can effectively reduce geometric tolerance of the work piece such as radial runout, circular degree, and the like, and heightens machining precision.
Description
Technical field
The present invention relates to a kind of device that improves a class and tubing workpiece processing rigidity and machining accuracy, belong to the fixture technology 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 when holding out against, the bad control of pressure, power is excessive easily with the workpiece bending, power is too small, and workpiece is inaccurate in radial location, and the dimensional tolerance of processed workpiece and form and position tolerance are not easy to guarantee.
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.
Summary of the invention
The present invention is directed to existing axle class and the turning of tubing workpiece and add the deficiency that the fixture technology that adopts man-hour exists, the device of a kind of simple and convenient, accurate positioning, the raising axle class that can effectively reduce form and position tolerances such as workpiece circular runout and circularity and tubing workpiece processing rigidity and machining accuracy is provided.
The device that improves axle class and tubing workpiece processing rigidity and machining accuracy of the present invention adopts following technical solution:
The device of this raising axle class and tubing workpiece processing rigidity and machining accuracy comprises chuck that is installed in the lathe spindle front end and the take-up device that is installed in lathe tail, chuck also is installed on this take-up device, and two relative installations of chuck and its axis are on the same straight line.
Described take-up device adopts the hydraulic-driven structure, comprise hydraulic cylinder, bearing block, bearing, chuck seat and base, hydraulic cylinder is installed on the base, base has the bottom of matching with the lathe guide pass, be provided with piston rod in the hydraulic cylinder, one end of piston rod stretches out the front end of hydraulic cylinder, be provided with the radial location device of piston rod between the inwall of piston rod and hydraulic cylinder, the external part of piston rod is equipped with bearing block, bearing is installed on the bearing block, chuck seat is installed, chuck for installing on the chuck seat on the bearing.
When working shaft-like workpiece or tubing workpiece, movable base is clamped in the two ends of workpiece respectively on two chucks to correct position on the lathe guide rail, fixes base.Control the piston rod of above-mentioned take-up device by hydraulic control system workpiece is strained between two chucks, under tension, process.
Described take-up device also can adopt spiral travel mechanism, comprise sleeve, pull bar, screw rod, bearing block, bearing, chuck seat and base, sleeve is installed on the base, base has the bottom of matching with the lathe guide pass, be provided with pull bar in the sleeve, one end of pull bar stretches out barrel forward end, by screw thread screw rod is installed on the rear end cap of sleeve, the front end of screw rod withstands on the rear end of pull bar, is provided with spring between the drive end bearing bracket of sleeve draw-in bar and sleeve, is provided with the radial location device of pull bar between the inwall of pull bar and sleeve, the end that pull bar stretches out sleeve is equipped with bearing block, bearing is installed on the bearing block, chuck seat is installed on the bearing, chuck for installing on the chuck seat.
During working shaft-like workpiece, movable base is fixed base to correct position on the lathe guide rail, and rotating screw bolt moves forward, and the screw rod pushing drawing rod also moves forward, and gives precompression of spring.Two ends with shaft-like workpiece are clamped in respectively on former and later two chucks again.Then, the backward rotation screw rod moves screw rod backward, no longer contacts with pull bar, pull bar is in free state, and at this moment, spring pushing drawing rod under the precompression effect moves backward, the chuck of pull bar drive simultaneously moves backward, makes the shaft-like workpiece tension between two chucks, processes.
Accurate positioning of the present invention, adopt two ends to be the mode that chuck clamps, and workpiece is processed under tension, make workpiece that the trend of elongation be arranged at axial direction, and tightening force is changed with the variation of cutting force, 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 the structural representation of first embodiment of the invention.
Fig. 2 is the user mode schematic diagram of the present invention when processing the tubing workpiece.
Fig. 3 is the structural representation of second embodiment of the invention.
Wherein: 1, chuck, 2, bolt, 3, back-up ring, 4, chuck seat, 5, bearing, 6, bearing block, 7, drive end bearing bracket, 8, hydraulic cylinder, 9, piston rod, 10, alignment pin, 11, base, 12, key, 13, shaft-like workpiece, 14, chuck, 15, frock, 16, tubing workpiece, 17, spring, 18, pull bar, 19, sleeve, 20, screw rod, 21, handwheel.
The specific embodiment
As shown in Figure 1, the device of the raising axle class of present embodiment and tubing workpiece processing rigidity and machining accuracy mainly comprises chuck 1 that is installed in the lathe spindle front end and the take-up device that is installed in lathe tail, chuck 14 is installed on this take-up device, and chuck 1 is on the same straight line with chuck 14 relative installations and its axis.
The take-up device of present embodiment adopts the hydraulic-driven structure.This take-up device comprises hydraulic cylinder 8, bearing block 6, bearing 5, chuck seat 4 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, one end of piston rod 9 stretches out the drive end bearing bracket 7 of hydraulic cylinder 8, 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 7 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 inboard wall of cylinder block of the rear end cap of hydraulic cylinder 8 and 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 external part of piston rod 9 is equipped with bearing block 6, and bearing block 6 is connected by key 12 with piston rod 9, and by bolt 2 and back-up ring 3 axial restraints.Bearing 5 is installed on the bearing block 6, and bearing 5 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 6 by screw, and blowout patche is connected with chuck seat 4 by screw.Chuck 14 is installed on the chuck seat 4 by bolt.
The effect of take-up device is to drive chuck 14 to move axially, and piston rod 9 can only move axially and can not rotate.In order to prevent that piston rod 9 from rotating with chuck 14, between the inboard wall of cylinder block of piston rod 9 and hydraulic cylinder 8, be provided with the radial location device, this radial location device is to process axial groove on piston rod 9, alignment pin 10 is installed on the inboard wall of cylinder block of hydraulic cylinder 8, 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.
During working shaft-like workpiece 13, movable base 11 is clamped in the two ends of shaft-like workpiece 13 respectively on chuck 1 and the chuck 14 to correct position on the lathe guide rail, fixes base 11.Hydraulic control system control hydraulic oil is entered by the front portion of hydraulic cylinder 8, and the rear portion is fuel-displaced, promotes piston rod 9 drive chucks 14 and moves backward, makes shaft-like workpiece 13 tensions between chuck 1 and chuck 14, processes.
As shown in Figure 2, during processing tubing workpiece 16, should process the frock 15 that is used for clamping earlier, frock 15 is fixedly mounted on the two ends of tubing workpiece 16, frock 15 by chuck 1 and chuck 14 clamping tubing workpiece 16 two ends, adopt working shaft-like workpiece 13 the same steps to make 16 tensions of tubing workpiece again, process.Certainly, also can be directly the endoporus of tubing workpiece 16 be contained on the claw of chuck 1 and chuck 14, by the backward rotation chuck claw be opened and clamp tubing workpiece 16, process.
The take-up device of present embodiment adopts hydraulic-driven, tightening force is changed with the variation of cutting force, 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.
As shown in Figure 3, as different from Example 1, the take-up device of present embodiment adopts spiral travel mechanism.This take-up device comprises sleeve 19, pull bar 18, screw rod 20, bearing block 6, bearing 5, chuck seat 4 and base 11, sleeve 19 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 pull bar 18 in the sleeve 19, an end of pull bar 18 stretches out sleeve 19 drive end bearing brackets, and by the screw rod 20 that has been threaded, the front end of screw rod 20 withstands on the rear end of pull bar 18 on the rear end cap of sleeve 19, and the rear end of screw rod 20 is equipped with handwheel 21.Between the drive end bearing bracket of sleeve 19 draw-in bars 18 and sleeve 19, be provided with spring 17.Chuck 14 is identical with embodiment 1 with the connected mode of pull bar 18, and the end that pull bar 18 stretches out sleeve 19 is equipped with bearing block 6, and bearing block 6 and pull bar 18 are connected by key, and by bolt and back-up ring axial restraint.Bearing 5 is installed on the bearing block 6, is connected with chuck seat 4 on the bearing 5, chuck 14 is installed on the chuck seat 4.Pull bar 18 also can only move axially in sleeve 19 and can not rotate, therefore between the inwall of pull bar 18 and sleeve 19, be provided with the radial location device, this radial location device is to process axial groove on pull bar 18, alignment pin 10 is installed on the inwall of sleeve 19, alignment pin 10 cooperates with axial groove on the pull bar 18, has guaranteed that pull bar 18 can only move axially and can not rotate.
During working shaft-like workpiece, movable base 11 is to correct position on the lathe guide rail, fix base 11, by rotating handwheel 21 screw rod 20 is moved forward, screw rod 20 pushing drawing rods 18 also move forward simultaneously, give 17 1 precompressions of spring, when this state, the two ends of shaft-like workpiece are clamped in respectively on chuck 1 and the chuck 14.Then, backward rotation handwheel 21, screw rod 20 is moved backward, no longer contact with pull bar 18, pull bar 18 is in free state, at this moment, spring 17 pushing drawing rod 18 under the precompression effect moves backward, pull bar 18 drive chucks 14 move backward simultaneously, make the shaft-like workpiece tension between chuck 1 and chuck 14, process.
The process of processing tubing workpiece 1 process described and above-mentioned shaft-like workpiece is in conjunction with the embodiments carried out.
The take-up device of present embodiment applies tightening force by the elastic force of spiral travel mechanism and spring to workpiece, can change with the variation of cutting force equally, 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.
Claims (3)
1. device that improves a class and tubing workpiece processing rigidity and machining accuracy, it is characterized in that: comprise chuck that is installed in the lathe spindle front end and the take-up device that is installed in lathe tail, chuck also is installed on this take-up device, and two relative installations of chuck and its axis are on the same straight line.
2. the device that improves axle class and tubing workpiece processing rigidity and machining accuracy according to claim 1, it is characterized in that: described take-up device adopts the hydraulic-driven structure, comprise hydraulic cylinder, bearing block, bearing, chuck seat and base, hydraulic cylinder is installed on the base, base has the bottom of matching with the lathe guide pass, be provided with piston rod in the hydraulic cylinder, one end of piston rod stretches out the front end of hydraulic cylinder, be provided with the radial location device of piston rod between the inwall of piston rod and hydraulic cylinder, the external part of piston rod is equipped with bearing block, bearing is installed on the bearing block, chuck seat is installed on the bearing, chuck for installing on the chuck seat.
3. the device that improves axle class and tubing workpiece processing rigidity and machining accuracy according to claim 1, it is characterized in that: described take-up device adopts spiral travel mechanism, comprise sleeve, pull bar, screw rod, bearing block, bearing, chuck seat and base, sleeve is installed on the base, base has the bottom of matching with the lathe guide pass, be provided with pull bar in the sleeve, one end of pull bar stretches out barrel forward end, by screw thread screw rod is installed on the rear end cap of sleeve, the front end of screw rod withstands on the rear end of pull bar, between the drive end bearing bracket of sleeve draw-in bar and sleeve, be provided with spring, be provided with the radial location device of pull bar between the inwall of pull bar and sleeve, the end that pull bar stretches out sleeve is equipped with bearing block, and bearing is installed on the bearing block, chuck seat is installed, chuck for installing on the chuck seat on the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910017594A CN101623767A (en) | 2009-08-11 | 2009-08-11 | Device for heightening machining rigid and machining precision of shaft type work piece and tube type work piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910017594A CN101623767A (en) | 2009-08-11 | 2009-08-11 | Device for heightening machining rigid and machining precision of shaft type work piece and tube type work piece |
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| CN101623767A true CN101623767A (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910017594A Pending CN101623767A (en) | 2009-08-11 | 2009-08-11 | Device for heightening machining rigid and machining precision of shaft type work piece and tube type work piece |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059356A (en) * | 2010-11-11 | 2011-05-18 | 彭洪富 | Lengthened head structure of main shaft of double-sided vehicle |
| CN102744429A (en) * | 2012-04-20 | 2012-10-24 | 沈阳工业大学 | Detecting positioning device and method for helical track on numerical control screw thread repairing lathe |
| CN102773737A (en) * | 2012-08-15 | 2012-11-14 | 浙江中航来宝精工科技有限公司 | Turning machining method of flange bolt as well as positioning and clamping device for same |
| CN104894559A (en) * | 2015-07-02 | 2015-09-09 | 哈尔滨蓝光智能电站技术有限公司 | Workshop cylindrical surface deposition equipment |
| CN108296498A (en) * | 2018-03-20 | 2018-07-20 | 茂名市高级技工学校 | A kind of tail stock auxiliary clamp device applied to turning elongated shaft |
| CN112692317A (en) * | 2021-01-11 | 2021-04-23 | 南京信息职业技术学院 | Self-adaptive clamping system of numerical control machine tool and control method thereof |
| CN112719427A (en) * | 2020-12-31 | 2021-04-30 | 江苏泰源数控机床有限公司 | Full-automatic numerical control sawing machine |
-
2009
- 2009-08-11 CN CN200910017594A patent/CN101623767A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059356A (en) * | 2010-11-11 | 2011-05-18 | 彭洪富 | Lengthened head structure of main shaft of double-sided vehicle |
| CN102059356B (en) * | 2010-11-11 | 2012-07-25 | 彭洪富 | Lengthened head structure of main shaft of double-sided vehicle |
| CN102744429A (en) * | 2012-04-20 | 2012-10-24 | 沈阳工业大学 | Detecting positioning device and method for helical track on numerical control screw thread repairing lathe |
| CN102773737A (en) * | 2012-08-15 | 2012-11-14 | 浙江中航来宝精工科技有限公司 | Turning machining method of flange bolt as well as positioning and clamping device for same |
| CN104894559A (en) * | 2015-07-02 | 2015-09-09 | 哈尔滨蓝光智能电站技术有限公司 | Workshop cylindrical surface deposition equipment |
| CN108296498A (en) * | 2018-03-20 | 2018-07-20 | 茂名市高级技工学校 | A kind of tail stock auxiliary clamp device applied to turning elongated shaft |
| CN112719427A (en) * | 2020-12-31 | 2021-04-30 | 江苏泰源数控机床有限公司 | Full-automatic numerical control sawing machine |
| CN112692317A (en) * | 2021-01-11 | 2021-04-23 | 南京信息职业技术学院 | Self-adaptive clamping system of numerical control machine tool and control method thereof |
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Application publication date: 20100113 |