CN102489792A - Lathe and method for processing external thread of screw - Google Patents
Lathe and method for processing external thread of screw Download PDFInfo
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- CN102489792A CN102489792A CN2011104052656A CN201110405265A CN102489792A CN 102489792 A CN102489792 A CN 102489792A CN 2011104052656 A CN2011104052656 A CN 2011104052656A CN 201110405265 A CN201110405265 A CN 201110405265A CN 102489792 A CN102489792 A CN 102489792A
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Abstract
The invention discloses a lathe for processing an external thread of a screw which can avoid that the screw is bent when being processed. The lathe for processing the external thread of the screw provided by the invention comprises a lathe base, a chuck and a tail bed which are arranged on the lathe base as well as an external thread cutting die, wherein the external thread cutting die is clamped onto the chunk and is coaxial with a workpiece, the clamping part of the tail bed is provided with a standstill locking structure, and the workpiece is arranged on the tail bed and can axially move relative to a shaft of the lathe base. The external thread cutting die is used for processing the screw, thus the workpiece only receives torque and no radial force during processing, no bending moment capable of causing the screw to be bent is produced, cutter relieving phenomenon on the workpiece can not be produced, and external thread accuracy of a finished product screw is guaranteed.
Description
Technical field
The present invention relates to a kind of lathe, especially a kind of screw rod external screw thread lathe for machining.In addition, the invention still further relates to a kind of processing method, especially a kind of screw rod external screw thread processing method.
Background technology
Usually, adopting engine lathe processing slim threaded rod external screw thread all is to adopt method as shown in Figure 1: with the rod member of required processing be fixed on chuck and top between, accomplish the externally threaded processing of screw rod through the rotation of workpiece and the effect of screw cutter.
There is a problem in this processing method: be exactly that spiro rod length is long more, draw ratio is big more, and its clamping rigidity is just poor more; Under cutting force F effect, very easily bend; Simultaneously, because rod member length is long, the thermal deformation amount of stretching is big; Common back centre is fixing can to hinder its elongation, and this will aggravate the bending of screw rod to be processed.And the bending of workpiece can produce the cutter relieving phenomenon in the processing, influences crudy, finally causes forming a large amount of processing waste products.
Summary of the invention
Technical problem to be solved by this invention provides a kind of crooked screw rod external screw thread lathe for machining of avoiding when the processing screw rod, producing.
The present invention solves the screw rod external screw thread lathe for machining that its technical problem adopts; Comprise the lathe base, be arranged on chuck and tailstock on the lathe base; Also comprise screwing die; Said screwing die is clamped on the said chuck and is coaxial with workpiece, and the clamping part of said tailstock is provided with spline structure, and said workpiece is arranged on the said tailstock and can be with respect to the axially-movable of said lathe base.
Further be, said spline structure is a clamping structure, and said workpiece is fixedly mounted on said clamping structure, said tailstock and said lathe base movingly and the direction of motion of said tailstock coaxial with said chuck.
Further be that said tailstock through guide rail and said lathe base movingly.
Further be, said spline structure is the convexity that is arranged on the said tailstock inwall, said workpiece and said tailstock on axial direction movingly.
Another technical problem to be solved of the present invention provides a kind of crooked screw rod external screw thread processing method of avoiding when the processing screw rod, producing.
The present invention solves the screw rod external screw thread processing method that its technical problem adopts, and may further comprise the steps:
The screwing die that the external screw thread that A, selection and workpiece need be processed is complementary, and be fixedly installed on the chuck screwing die is coaxial;
B, workpiece is installed between screwing die and the tailstock and guarantees that the three is coaxial, can be after the workpiece spline is installed on the tailstock with respect to the axially-movable of lathe base;
C, start lathe and make chuck drive screwing die to rotate, make screwing die on workpiece, process external screw thread;
D, oppositely start lathe, make workpiece from screwing die, withdraw from.
Further be, in the B step, the fixing peace of workpiece is clamped on the tailstock, and tailstock is movably arranged on also can be with respect to the axially-movable of lathe base on the lathe base.
Further be that in the B step, the relative motion of tailstock and lathe base is to realize through guide rail.
Further be, in the B step, tailstock is fixedly connected on the lathe base, but workpiece axially-movable but can not rotate on being installed in tailstock the time.
The invention has the beneficial effects as follows: utilize screwing die to process screw rod; Like this in processing; Therefore workpiece only receives moment of torsion, and can not receive the radially power of aspect, can not produce moment of flexure and make bent screws; The phenomenon of cutter relieving just can not appear in workpiece like this, has guaranteed the external screw thread precision of finished product screw rod.Tailstock can make workpiece with respect to the axially-movable of lathe base but can't rotate; Like this in processing; Workpiece can move along with the processing of screwing die gradually; Expand with heat and contract with cold and to be compensated through the relative motion of workpiece because of what processing produced, avoided the mismachining tolerance of expanding with heat and contract with cold and producing thus.
Description of drawings
Fig. 1 is the sketch map of prior art;
Fig. 2 is a sketch map of the present invention;
Parts, position and numbering among the figure: screwing die 1, workpiece 2, tailstock 3, chuck 4, lathe base 5, universal cutter 6.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in Figure 1; The present invention includes lathe base 5, be arranged on chuck 4 and tailstock 3 on the lathe base 5; Also comprise screwing die 1; Said screwing die 1 is clamped on the said chuck 4 and is coaxial with workpiece 2, and the clamping part of said tailstock 3 is provided with spline structure, and said workpiece 2 is arranged on the said tailstock 3 and can be with respect to said lathe base 5 axially-movables.Adding man-hour,, again workpiece 2 is being installed on tailstock 3 and the screwing die 1 at first with screwing die 1 coaxial being fixedly installed on the chuck 4; Guaranteed that screwing die 1, workpiece 2 and tailstock 3 threes are coaxial, after installing, started lathe; Chuck 4 rotates and drives screwing die 1 rotation; Rotate and need and treat that thread rotary orientation is identical, control to suitable velocity of rotation, screwing die 1 can process screw thread on workpiece 2; After completion of processing, counter-rotating screwing die 1 can withdraw from workpiece 2.Can find out from above-mentioned process; Workpiece 2 only receives the moment of torsion of screwing die 1 to its generation in the process of processing; The deadweight of removing workpiece 2 does not have extra power outward and produces moment of flexure; Therefore workpiece 2 hardly can be crooked in process, and the buckling phenomenon of just having avoided traditional diamond-making technique to cause has thus guaranteed the machining accuracy of screw thread.Workpiece 2 is arranged on also can be through said tailstock 3 with respect to said lathe base 5 axially-movables on the said tailstock 3; Workpiece 2 can self and tailstock 3 realizes and the relative motion of lathe base 5 at axial direction movingly, also can realize the relative motion with lathe base 5 through the relative motion of tailstock 3 and lathe base 5; Because the relative motion that screwing die 1 produces with workpiece 2 when feed just can be by above-mentioned method realization; Simultaneously; The heat that work in-process produces rises and also can be dissolved with the relative motion of lathe base 5 because of workpiece 2, so workpiece 2 can not increase and bending self because of the length of being heated.To sum up, workpiece 2 is because work in-process can be crooked, and the external screw thread precision that therefore processes is higher, and the said equipment can be through existing equipment transformation realization, and screwing die 1 adopts hand to get final product with the strand screwing die, and the scrap build cost that therefore carries out is lower.
Concrete, said spline structure is a clamping structure, and said workpiece 2 is fixedly mounted on said clamping structure, said tailstock 3 and said lathe base 5 movingly and the direction of motion of said tailstock 3 coaxial with said chuck 4.In use, workpiece 2 is clamped on the tailstock 3 gets final product, guarantee that with this workpiece 2 is fixedly connected with tailstock 3 and relative motion does not take place; Tailstock 3 is movably arranged on the lathe base 5; The preferred guide rail that uses comes mounted tailstock 3, identical the getting final product of axial direction of the installation direction of guide rail and chuck 4, thus; Workpiece 2 so can so just can compensate the axial displacement that produces when adding man-hour and being heated with respect to 5 axially-movables of lathe base the installation successor.Location when adopting said structure between workpiece 2 and the tailstock 3 is more or less freely, and it is also comparatively convenient to install, and only needs to clamp workpiece 2 and gets final product.
As another embodiment of the invention, said spline structure is the convexity that is arranged on said tailstock 3 inwalls, said workpiece 2 and said tailstock 3 on axial direction movingly.Adopt this mode tailstock 3 can be fixed on the lathe base 5, also can not fix.The head of workpiece 2 is generally hexagon; Therefore, in tailstock 3 inwalls are provided with protruding or other convexity of hexagonal all can, workpiece 2 in being inserted into tailstock 3 after; Because protruding stops and can't rotate; So just can utilize the rotation of screwing die 1 to come machining screw, and tailstock 3 does not stop the motion of workpiece 2 at axial direction, so can compensate the axial displacement that produces when adding man-hour and being heated.The mode that adopts tailstock 3 to be fixed on the lathe base 5 relatively has superiority when the product of the same kind of processing, and the syndeton of tailstock 3 is comparatively simple, also need not to regulate tailstock 3 man-hour adding.Adopt the mode that flexibly connects tailstock 3 then more flexible; Tailstock 3 can be in lathe base 5 cofree positioning and fixing; Tailstock 3 also need not to fix with the relative position of workpiece 2; Therefore in processing, can utilize tailstock 3 to revise the position of workpiece 2 at any time, promptly regulate tailstock 3 move left and right to revise the position of workpiece 2.
Embodiment one
Utilize common machined into elongate threaded screw external screw thread, adopt following steps:
The screwing die 1 that A, selection and workpiece 2 need the external screw thread of processing to be complementary, and with screwing die 1 coaxial being fixedly installed on the chuck 4, screwing die 1 selects for use common hand to get final product with the strand screwing die;
B, workpiece 2 is installed between screwing die 1 and the tailstock 3 and guarantees that the three is coaxial, tailstock 3 adopts common centre frame get final product, but installing that workpiece 2 centre frames are not fixed on the guide rail state that needs the assurance axially-movable;
C, start lathe and make chuck 4 drive screwing dies 1 to rotate, make screwing die 1 on workpiece 2, process external screw thread, on the working position that adds timely phase workpiece 2 in man-hour, water cooling fluid;
D, after the external screw thread completion of processing, oppositely start lathe, make workpiece 2 from screwing die 1, withdraw from.
The device that this example adopted is existing, so the scrap build cost is almost nil, promptly can guarantee machining accuracy, also can not produce extra cost.
Embodiment two
Adopt following steps processing slim screw rod external screw thread:
The screwing die 1 that A, selection and workpiece 2 need the external screw thread of processing to be complementary, and with screwing die 1 coaxial being fixedly installed on the chuck 4, screwing die 1 selects for use common hand to get final product with the strand screwing die;
B, workpiece 2 is installed between screwing die 1 and the tailstock 3 and guarantees that the three is coaxial; Tailstock 3 adopts special tailstock 3; Its underpart has the through hole that the chute that is installed to the lathe base upper rail and bolt, its top have interior hexagonal, and workpiece 2 directly is inserted into the interior hexagonal through hole on the tailstock 3;
C, start lathe and make chuck 4 drive screwing dies 1 to rotate, make screwing die 1 on workpiece 2, process external screw thread, on the working position that adds timely phase workpiece 2 in man-hour, water cooling fluid;
D, after the external screw thread completion of processing, oppositely start lathe, make workpiece 2 from screwing die 1, withdraw from.
This example can be through unclamping or the screwed in place bolt is regulated the position of tailstock 3 when producing; Therefore work in-process can be shut down the relative position of regulating tailstock 3 and workpiece 2 at any time; Optimize the force-bearing situation of workpiece 2, thereby process accurate more external screw thread.
Claims (8)
1. screw rod external screw thread lathe for machining; Comprise lathe base (5), be arranged on chuck (4) and tailstock (3) on the lathe base (5); It is characterized in that: also comprise screwing die (1); Said screwing die (1) is clamped in that said chuck (4) is gone up and is coaxial with workpiece (2), and the clamping part of said tailstock (3) is provided with spline structure, and said workpiece (2) is arranged on that said tailstock (3) is gone up and can be with respect to said lathe base (5) axially-movable.
2. screw rod external screw thread lathe for machining as claimed in claim 1; It is characterized in that: said spline structure is a clamping structure; Said workpiece (2) is fixedly mounted on said clamping structure, said tailstock (3) and said lathe base (5) movingly and the direction of motion of said tailstock (3) coaxial with said chuck (4).
3. screw rod external screw thread lathe for machining as claimed in claim 2 is characterized in that: said tailstock (3) through guide rail and said lathe base (5) movingly.
4. screw rod external screw thread lathe for machining as claimed in claim 1 is characterized in that: said spline structure is for being arranged on the convexity on said tailstock (3) inwall, said workpiece (2) and said tailstock (3) on axial direction movingly.
5. screw rod external screw thread processing method is characterized in that: may further comprise the steps:
The screwing die (1) that A, selection and workpiece (2) need the external screw thread of processing to be complementary, and be fixedly installed on the chuck (4) screwing die (1) is coaxial;
B, workpiece (2) is installed between screwing die (1) and the tailstock (3) and guarantees that the three is coaxial, workpiece (2) spline is installed to tailstock (3) can be with respect to lathe base (5) axially-movable after going up;
C, start lathe and make chuck (4) drive screwing die (1) to rotate, make screwing die (1) on workpiece (2), process external screw thread;
D, oppositely start lathe, make workpiece (2) from screwing die (1), withdraw from.
6. screw rod external screw thread processing method as claimed in claim 5 is characterized in that: in the B step, the fixing peace of workpiece (2) is clamped on the tailstock (3), and tailstock (3) is movably arranged on lathe base (5) upward also can be with respect to lathe base (5) axially-movable.
7. screw rod external screw thread processing method as claimed in claim 6 is characterized in that: in the B step, tailstock (3) is to realize through guide rail with the relative motion of lathe base (5).
8. screw rod external screw thread processing method as claimed in claim 5 is characterized in that: in the B step, tailstock (3) is fixedly connected on the lathe base (5), and workpiece (2) is being installed in tailstock (3) but axially-movable of last time but can not rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104052656A CN102489792A (en) | 2011-12-08 | 2011-12-08 | Lathe and method for processing external thread of screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104052656A CN102489792A (en) | 2011-12-08 | 2011-12-08 | Lathe and method for processing external thread of screw |
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| CN102489792A true CN102489792A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104052656A Pending CN102489792A (en) | 2011-12-08 | 2011-12-08 | Lathe and method for processing external thread of screw |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102922324A (en) * | 2012-11-05 | 2013-02-13 | 宁夏天地奔牛实业集团有限公司 | Positioning clamping device for mining vertical-ring connector chain rings |
| CN103495780A (en) * | 2013-10-09 | 2014-01-08 | 郑州金泰制罐有限公司 | Method for machining threaded rod through lathe |
| CN104057160A (en) * | 2014-06-26 | 2014-09-24 | 南京梅山冶金发展有限公司 | Processing method of long and thin workpiece thread and chuck fixture assembly |
| CN104070379A (en) * | 2014-07-08 | 2014-10-01 | 崔春枝 | Fixture for machining lead screw |
| CN111761293A (en) * | 2020-06-30 | 2020-10-13 | 中国石油集团渤海钻探工程有限公司 | Screw buckle surface processing and repairing equipment for blowout preventer and using method thereof |
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| CN101264534A (en) * | 2008-04-09 | 2008-09-17 | 南京航空航天大学 | Method for processing screw thread by digital control lathes and screw thread processing tool thereby |
| JP2008221354A (en) * | 2007-03-09 | 2008-09-25 | Sintokogio Ltd | Die for thread cutting and machine tool for thread cutting having same |
| KR100873977B1 (en) * | 2007-10-02 | 2008-12-17 | 주식회사 삼진금속 | Manufacturing system for through bolt for gas turbine and manufacuring method for through bolt using the same |
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Patent Citations (6)
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| JP2008221354A (en) * | 2007-03-09 | 2008-09-25 | Sintokogio Ltd | Die for thread cutting and machine tool for thread cutting having same |
| KR100873977B1 (en) * | 2007-10-02 | 2008-12-17 | 주식회사 삼진금속 | Manufacturing system for through bolt for gas turbine and manufacuring method for through bolt using the same |
| DE102007060554A1 (en) * | 2007-12-13 | 2009-06-18 | EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge | Method for manufacturing external thread, involves placing processing workpiece and tool together in working position with rotation axis and screw thread forming area |
| CN101264534A (en) * | 2008-04-09 | 2008-09-17 | 南京航空航天大学 | Method for processing screw thread by digital control lathes and screw thread processing tool thereby |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102922324A (en) * | 2012-11-05 | 2013-02-13 | 宁夏天地奔牛实业集团有限公司 | Positioning clamping device for mining vertical-ring connector chain rings |
| CN102922324B (en) * | 2012-11-05 | 2015-01-21 | 宁夏天地奔牛实业集团有限公司 | Positioning clamping device for mining vertical-ring connector chain rings |
| CN103495780A (en) * | 2013-10-09 | 2014-01-08 | 郑州金泰制罐有限公司 | Method for machining threaded rod through lathe |
| CN104057160A (en) * | 2014-06-26 | 2014-09-24 | 南京梅山冶金发展有限公司 | Processing method of long and thin workpiece thread and chuck fixture assembly |
| CN104070379A (en) * | 2014-07-08 | 2014-10-01 | 崔春枝 | Fixture for machining lead screw |
| CN111761293A (en) * | 2020-06-30 | 2020-10-13 | 中国石油集团渤海钻探工程有限公司 | Screw buckle surface processing and repairing equipment for blowout preventer and using method thereof |
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Application publication date: 20120613 |