CN107775120A - The method for milling of not full thread is removed on numerical control boring and milling center - Google Patents
The method for milling of not full thread is removed on numerical control boring and milling center Download PDFInfo
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- CN107775120A CN107775120A CN201610784835.XA CN201610784835A CN107775120A CN 107775120 A CN107775120 A CN 107775120A CN 201610784835 A CN201610784835 A CN 201610784835A CN 107775120 A CN107775120 A CN 107775120A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/32—Thread cutting; Automatic machines specially designed therefor by milling
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Abstract
The present invention relates to the field of core main pump processing, specifically a kind of method for milling that not full thread is removed on numerical control boring and milling center.Comprise the following steps：Using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, it is determined that first position detained entirely to be processed；It is determined that the machining area where processing starting point；According to the different machining areas of determination, different working depths is determined, cutter is determined at working depth, using upmilling, i.e., carries out milling from inner past end face.The present invention is got rid of full thread part, so in assembling process, full thread part can not scratch kingbolt surface for it, and be easy to kingbolt to be aligned with main thread hole, increase the security of assembling, be easy to assemble by milling mode.
Description
Technical field
The present invention relates to the field of core main pump processing, specifically one kind removes not full thread on numerical control boring and milling center
Method for milling.
Background technology
The core main pump pump housing is large-scale workpiece, and weight is more than 18 tons, major thread hole (this size on its sealing flange face
In more than M100) it need to be processed on large-sized numerical control boring and milling center, no matter whether the end face of screwed hole is entered in practical operation
Row chamfering, occur be not full thread thread, this is inevitable phenomenon.According to the processing and manufacturing requirement of core main pump, screw thread
The beginning in hole does not allow not full thread part be present.It is currently that the side that manual grinding is used after screw thread is processed in equipment
Method removes not full thread part.There is too many uncertain factor in manual grinding operation, be that a workpiece has multiple spiral shells first
Pit, it is ensured that the adjacent thread in the inside can not be hurt in bruting process；Secondly milling tools can not contain pollution element, valency
Lattice are high, and because hole is more, milling tools quantity consumed is big；The substantial amounts of process time of worker is consumed again.Even if using some
Safeguard measure, it is also difficult to ensure the safety and reliability of operation；Therefore exploitation numerical control program is processed, and increases the peace of manufacture
Quan Xing, economy, reliability.
As shown in figure 1, the large-sized pitch P of in general is all between 3-6mm, spacing all very littles of screw thread, close
The position of end face is all not full thread part, this partial threads sharp edges, it is easy to bolt surface is scratched, and due to existing
This partial threads, bolt are also not easy to align.
The content of the invention
For the part of above shortcomings in the prior art, the technical problem to be solved in the present invention is to provide one kind in number
The method for milling of not full thread is removed on control boring and milling center, technical requirements are reached using the method for milling tool.
The used to achieve the above object technical scheme of the present invention is：One kind removes infull spiral shell on numerical control boring and milling center
The method for milling of line, comprises the following steps：
Using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, it is determined that to be processed first is complete
The position of button；
It is determined that the machining area where processing starting point；
According to the different machining areas of determination, different working depths is determined, cutter is determined at working depth, adopted
With upmilling, i.e., carry out milling from inner past end face.
The machining area is divided into four regions：Using the X-axis of digital control system, Y-axis as reference axis, a circumference is divided
For the quartering, four regions are formed, each region is 1/4 circumference, wherein, the processing starting point in No. 1 region is 0 degree, No. 2 areas
The processing starting point in domain is -90 degree, and the processing starting point in No. 3 regions is -180 degree, and the processing starting point in No. 4 regions is -270
Degree.
It is described to determine cutter at working depth, using upmilling, i.e., milling is carried out from inner past end face, be specially：First
Z axis is moved to datum plane, then Z axis is moved to required working depth；Cutting counterclockwise, center cutter is with circular arc
Formula is cut into initial point position S points along threaded line；Cutting full circle, X-axis, Y-axis Origin And Destination are same point counterclockwise, Z axis
A pitch is moved along helix；X-axis is set to return to screwed hole center；Z axis is moved to safety and returns to plane.
When the machining area where processing starting point is No. 1 region, screw thread starting point is：X=R51, Y=0, Z=R53,
CR=R52, full circle is cut counterclockwise to X=0Y=0Z=R9I=-R51J=0.
When the machining area where processing starting point is No. 2 regions, screw thread starting point is：X=0, Y=-R51, Z=R53,
CR=R52, full circle is cut counterclockwise to X=0, Y=0, Z=R9, I=0, J=R51.
When the machining area where processing starting point is No. 3 regions, screw thread starting point is：X=-R51, Y=0, Z=R53,
CR=R52, full circle is cut counterclockwise to X=-R51, Y=0, Z=R53, CR=R52.
When the machining area where processing starting point is No. 4 regions, screw thread starting point is：X=0, Y=R51, Z=R53,
CR=R52, full circle is cut counterclockwise to X=0, Y=0, Z=R9, I=0, J=-R51.
The present invention has advantages below and beneficial effect：
1. not full thread, precision machining are removed by plant equipment processing method；
2. save the energy of pincers worker and save grinding apparatus；
It is 3. safe.
Brief description of the drawings
Fig. 1 is screw thread process figure；
Wherein, R21 is Major Diam, and d2 is the pitch diameter of thread, and d1 is diameter of thread, and R9 is pitch P；O is screwed hole center,
It is set as the origin of coordinates；
Fig. 2 is milling not full thread schematic diagram (machining area 1)；
Wherein, 1 is workpiece；2 be milling cutter；
Plane on the basis of A；B returns to plane for safety；L returns to plane and datum plane distance for safety；
S is processing not full thread starting point；R50 is milling cutter radius；R51 be the origin of coordinates to cutter starting point distance, i.e. OS away from
From；
Fig. 3 is the numerical control coordinate diagram of machining area 1；
Wherein, O-screwed hole center, is set as origin of coordinate；O ' is working depth；S-Tool in Cutting starting point；
R21 --- Major Diam；R50 --- milling cutter radius；R51 --- R21/2-R50, two circle center distances；R52=R51/2, cutter
Using R52 as radius, S points are run to from O ' with arc form；The cutting point in No. 1 region is 0 °, the cutting point in No. 2 regions is-
90 °, the cutting point in No. 3 regions is -180 °, and the cutting point in No. 4 regions is -270 °.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
The invention belongs to the processing method in core main pump processing and manufacturing field, is removed specifically on numerical control boring and milling center big
The numerical-control processing method of the not full thread part of screw thread.The method that the method uses numerical control programming, will not be complete by milling mode
Threaded portion is got rid of, and so in assembling process, full thread part can not scratch kingbolt surface for it, and be easy to main spiral shell
Bolt aligns with main thread hole, increases the security of assembling, is easy to assemble.Use what equipment produced for Italian PAMA companies
SPEEDRAM2000 numerical control boring and millings center, using SIEMENS840 language systems.
First：The unification of machining benchmark.It is as datum plane with workpiece end face when processing screw thread and not full thread
It is processed, and the security for uniformly ensuring that process operation of machining benchmark.
Second：The determination of machining area.Screw thread is the continuous helical line in the form of every 360 degree produce a pitch, is such as schemed
3, a circumference is divided into 4 deciles, forms 4 regions, each region is 1/4 circumference i.e. 90 degree, and the processing in No. 1 region originates
Point is 0 degree, and the processing starting point in No. 2 regions is -90 degree, and the processing starting point in No. 3 regions is -180 degree, the processing in No. 4 regions
Starting point is -270 degree, because the processing of each pitch is connected with helical wire form, i.e., 360 degree are 1 pitch, so
Each region is the distance generation with 1/4 pitch.
3rd：Process the determination of starting point.When processing screw thread, observation threaded end forms incomplete with workpiece end face
Which region screw position is in, and determines to determine the input parameter of program behind region again.
4th：It is processed by the way of upmilling.According to the different zones of determination, different working depths is determined, will
Cutter is determined at working depth, using upmilling, i.e., milling is carried out from inner past end face, due to having determined that phase at principle first
With machining benchmark, therefore using the processing method of from inside outwards milling, that is, ensure that can not be milled into the adjacent complete of the inside
Thread tooth, make its processing that there is security.
As shown in Figure 1-2, it is using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, so first
Afterwards by observation, first position detained entirely (such as Fig. 3) will be processed by determining, if No. 1 region, then the R1=in main program
1, if No. 2 regions then R1=2, by that analogy.When designing subprogram, milling is avoided to be linked to adjacent buckle teeth using 3 axles
Method is cut along lead angle roundlet (R52), is then enclosed along pitch full circle milling one, afterwards withdrawing, a hole machined is complete.
During from milling cutter can any milling cutter diameter, as long as being no more than bore dia can because have in subprogram calculate milling cutter radius.
Because this program and thread milling program are same machining benchmark planes, if when milling is not full thread to a zero point
Can be so that it is complete so hole that program can directly walk Continuous maching.This processing route is i.e. convenient and accurate.
Program description
Subprogram is set：R1=machining areas, R2=reference planes, R3=working depths (must be pitch multiple), R9
=pitch, R10=return to safely plane, R21=screwed hole nominal diameters.
R1=1R2=0R9=3R10=L R21=115R50=10
R1=machining areas, 4 regions are divided into, 1 is No. 1 region, and 2 be No. 2 regions, and 3 be No. 3 regions, and 4 be No. 4 areas
Domain.
R2=datum planes.
R9=pitch.
R10=L, safety return to plane.This plane is sufficiently large from datum plane, so that cutter from this hole in the case where running to
Avoid interfering with datum plane during one hole, break workpiece surface.
R21=Major Diams.
R50=milling cutter radiuses.
；(R1=MACHIN ANGLE 1=0DEGREE 2=-90DEGREE 3=-180DEGREE4=-
270DEGREE)
；(R2=REFERENCE PLANE)
；(R9=PITCH)
；(R10=RETRACT PLANE)
；(R21=THREAD DIA.)
；(R50=TOOL RAD.)
R51=R21/2-R50 milling cutters are moved to the air line distance of starting point.
R52=R51/2 milling cutters are moved to the radius of S points from working depth O '.
The pitch of R53=R9/4 1/4,360 degree are a pitch, because being 4 machining areas, every 90 degree are one
Machining area.
R80=-R9 assigns pitch numerical value to R80 and is used to calculate.
R81=R80-R53 R82=R81-R53 R83=R82-R53 R84=R83-R53
R81 --- the working depth in No. 1 region；R82 --- the working depth in No. 2 regions；
R83 --- the working depth in No. 3 regions；R84 --- the working depth in No. 4 regions；
Target program 1 is jumped to as R1=1.Target program 2 is jumped to as R1=2.Target is jumped to as R1=3
Program 3.Target program 4 is jumped to as R1=4.Target program is jumped to when what is not all equal to or over condition and range as R1
5。
LABEL1:Target program 1.
G00 G90 Z=R2 Z axis moves quickly into datum plane
The working depth that G00 Z=R81 Z axis is moved quickly into required for No. 1 region.
G91 G64 are changed to increment size programming by exhausted value, start continuous path configuration processor.
G03 X=R51 Y=0 Z=R53 CR=R52 are cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis moves
The distance of dynamic 1/4 pitch, cuts along lead angle.(G03 is program language, represents rotate counterclockwise；CR is program language,
Represent cutter path radius)
G03 X=0 Y=0 Z=R9 I=-R51 J=0 cut full circle counterclockwise, and X-axis Y-axis Origin And Destination is same
A bit, Z axis moves a pitch along helix.(I, J be center cutter S-phase for origin of coordinates O coordinate, be equal to X, Y
Coordinate)
G01 X=-R51 X-axis returns to screwed hole center.
G00 G90 G60 Z=R10 cancel standard and stop continuous path, and Z axis moves quickly into safety return with absolute value and put down
Face.
GOTOF LABEL5 jump to target 5 and terminate program.
LABEL2:Target program 2.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
The working depth that G00 Z=R82 Z axis is moved quickly into required for No. 2 regions.
G91 G64 are changed to increment size programming by exhausted value, start continuous path configuration processor.
G03 X=0 Y=-R51 Z=R53 CR=R52 are cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis moves
The distance of dynamic 1/4 pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=0 J=R51 cut full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axle moves a pitch along helix.
G01 Y=R51 X-axis returns to screwed hole center.
G00 G90 G60 Z=R10 cancel standard and stop continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5 jump to target 5 and terminate program.
LABEL3:Target program 3.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
The working depth that G00 Z=R83 Z axis is moved quickly into required for No. 3 regions.
G91 G64 are changed to increment size programming by exhausted value, start continuous path configuration processor.
G03 X=-R51 Y=0 Z=R53 CR=R52 are cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis moves
The distance of dynamic 1/4 pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=R51 J=0 cut full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axle moves a pitch along helix.
G01 X=R51 X-axis returns to screwed hole center.
G00 G90 G60 Z=R10 cancel standard and stop continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5 jump to target 5 and terminate program.
LABEL4:Target program 4.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
The working depth that G00 Z=R84 Z axis is moved quickly into required for No. 4 regions.
G91 G64 are changed to increment size programming by exhausted value, start continuous path configuration processor.
G03 X=0 Y=R51 Z=R53 CR=R52 are cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, Z axis movement
The distance of 1/4 pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=0 J=-R51 cut full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axle moves a pitch along helix.
G01 Y=-R51 X-axis returns to screwed hole center.
G00 G90 G60 Z=R10 cancel standard and stop continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5 jump to target 5 and terminate program.
LABEL5:M17 ends of subroutine.
Claims (7)
1. a kind of method for milling that not full thread is removed on numerical control boring and milling center, it is characterised in that comprise the following steps：
Using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, it is determined that first that to be processed is detained entirely
Position；
It is determined that the machining area where processing starting point；
According to the different machining areas of determination, different working depths is determined, cutter is determined at working depth, using inverse
Milling, i.e., carry out milling from inner past end face.
2. the method for milling according to claim 1 that not full thread is removed on numerical control boring and milling center, it is characterised in that institute
State machining area and be divided into four regions：Using the X-axis of digital control system, Y-axis as reference axis, a circumference is divided into the quartering,
Four regions are formed, each region is 1/4 circumference, wherein, the processing starting point in No. 1 region is 0 degree, the processing in No. 2 regions
Starting point is -90 degree, and the processing starting point in No. 3 regions is -180 degree, and the processing starting point in No. 4 regions is -270 degree.
3. the method for milling according to claim 1 that not full thread is removed on numerical control boring and milling center, it is characterised in that institute
State and determine cutter at working depth, using upmilling, i.e., carry out milling from inner past end face, be specially：It is moved to Z axis first
Datum plane, then Z axis is moved to required working depth；Cutting counterclockwise, center cutter is with arc form along screw thread
Line is cut into initial point position S points；Cutting full circle, X-axis, Y-axis Origin And Destination are same point counterclockwise, and Z axis is along helix
A mobile pitch；X-axis is set to return to screwed hole center；Z axis is moved to safety and returns to plane.
4. the method for milling according to claim 3 that not full thread is removed on numerical control boring and milling center, it is characterised in that when
When machining area where processing starting point is No. 1 region, screw thread starting point is：X=R51, Y=0, Z=R53, CR=R52, it is inverse
Hour hands cut full circle to X=0Y=0Z=R9I=-R51J=0.
5. the method for milling according to claim 3 that not full thread is removed on numerical control boring and milling center, it is characterised in that when
When machining area where processing starting point is No. 2 regions, screw thread starting point is：X=0, Y=-R51, Z=R53, CR=R52, it is inverse
Hour hands cut full circle to X=0, Y=0, Z=R9, I=0, J=R51.
6. the method for milling according to claim 3 that not full thread is removed on numerical control boring and milling center, it is characterised in that when
When machining area where processing starting point is No. 3 regions, screw thread starting point is：X=-R51, Y=0, Z=R53, CR=R52, it is inverse
Hour hands cut full circle to X=-R51, Y=0, Z=R53, CR=R52.
7. the method for milling according to claim 3 that not full thread is removed on numerical control boring and milling center, it is characterised in that when
When machining area where processing starting point is No. 4 regions, screw thread starting point is：X=0, Y=R51, Z=R53, CR=R52, it is inverse
Hour hands cut full circle to X=0, Y=0, Z=R9, I=0, J=-R51.
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|---|---|---|---|
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|---|---|---|---|---|
| CN1147435A (en) * | 1995-10-06 | 1997-04-16 | 胡彦群 | Single-forming internal thread milling technology |
| JP2003094248A (en) * | 2001-09-20 | 2003-04-03 | Nagoya Valve Kogyo Kk | Structure for forming jointing screw on periphery at pipe end |
| JP2005040912A (en) * | 2003-07-24 | 2005-02-17 | Takamatsu Machinery Co Ltd | Machining device |
| CN102126056A (en) * | 2011-01-06 | 2011-07-20 | 齐齐哈尔二机床(集团)有限责任公司 | XZC three-axis linkage thread milling method for milling machining center |
| CN102615363A (en) * | 2011-01-26 | 2012-08-01 | 贵州龙飞航空附件有限公司 | Method for three-coordinate numerical control center to machine thread on large special-shaped part |
| CN103341644A (en) * | 2013-07-08 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Method for removing turning thread incomplete teeth |
| CN103619522A (en) * | 2011-08-25 | 2014-03-05 | 理光越岭美有限公司 | Screw thread manufacturing method and screw thread |
-
2016
- 2016-08-31 CN CN201610784835.XA patent/CN107775120B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147435A (en) * | 1995-10-06 | 1997-04-16 | 胡彦群 | Single-forming internal thread milling technology |
| JP2003094248A (en) * | 2001-09-20 | 2003-04-03 | Nagoya Valve Kogyo Kk | Structure for forming jointing screw on periphery at pipe end |
| JP2005040912A (en) * | 2003-07-24 | 2005-02-17 | Takamatsu Machinery Co Ltd | Machining device |
| CN102126056A (en) * | 2011-01-06 | 2011-07-20 | 齐齐哈尔二机床(集团)有限责任公司 | XZC three-axis linkage thread milling method for milling machining center |
| CN102615363A (en) * | 2011-01-26 | 2012-08-01 | 贵州龙飞航空附件有限公司 | Method for three-coordinate numerical control center to machine thread on large special-shaped part |
| CN103619522A (en) * | 2011-08-25 | 2014-03-05 | 理光越岭美有限公司 | Screw thread manufacturing method and screw thread |
| CN103341644A (en) * | 2013-07-08 | 2013-10-09 | 东方电气集团东方汽轮机有限公司 | Method for removing turning thread incomplete teeth |
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