CN107775120B - 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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- CN107775120B CN107775120B CN201610784835.XA CN201610784835A CN107775120B CN 107775120 B CN107775120 B CN 107775120B CN 201610784835 A CN201610784835 A CN 201610784835A CN 107775120 B CN107775120 B CN 107775120B
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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.The following steps are included: using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, determination first position detained entirely to be processed；Determine the machining area where processing starting point；According to determining different machining areas, different working depths is determined, cutter is determined at working depth, using upmilling, i.e., carry out milling from inner past end face.The present invention is got rid of full thread part by milling mode, and in this way in assembling process, full thread part cannot not scratch kingbolt surface, and convenient for kingbolt and safety of the main thread hole to assembly just, is increased, convenient for assembly.
Description
Technical field
The present invention relates to the fields of core main pump processing, specifically a kind of to remove not full thread on numerical control boring and milling center
Method for milling.
Background technique
The core main pump pump housing is large-scale workpiece, major thread hole (this size of weight on 18 tons or more, sealing flange face
Need to be processed on large-sized numerical control boring and milling center in M100 or more), in actual operation no matter the end face of threaded hole whether into
Row chamfering, will appear not be 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 to have not full thread part.It is currently the side that manual grinding is used after processing screw thread in equipment
Method removes not full thread part.There are too many uncertain factors for manual grinding operation, are that there are multiple spiral shells for a workpiece first
Pit, it is ensured that the adjacent thread in the inside cannot be hurt during the grinding process；Secondly milling tools cannot contain pollution element, valence
Lattice are high, and since hole is more, milling tools quantity consumed is big；The a large amount of process time of worker is consumed again.Even if using some
Safeguard measure, it is also difficult to guarantee 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, general large-sized pitch P is all the spacing of screw thread all very littles between 3-6mm, close
The position of end face is all not full thread part, this partial threads sharp edges, it is easy to scratch bolt surface, and due to existing
This partial threads, bolt are also not easy to just.
Summary of the invention
Aiming at the defects existing 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 that not full thread is removed on control boring and milling center, reaches technical requirements using the method for milling tool.
Present invention technical solution used for the above purpose is: one kind removing infull spiral shell on numerical control boring and milling center
The method for milling of line, comprising the following steps:
Using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, to be processed first of determination is complete
The position of button；
Determine the machining area where processing starting point；
According to determining different machining areas, different working depths is determined, cutter is determined at working depth, is adopted
With upmilling, i.e., milling is carried out 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 being 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, specifically: first
So that Z axis is moved to datum plane, then Z axis is made to be moved to required working depth；Cutting counterclockwise, center cutter is with arc-shaped
Formula is cut into initial point position S point along threaded line；Cutting full circle counterclockwise, X-axis, Y-axis Origin And Destination are same point, Z axis
A screw pitch is moved along helix；Make X-axis back to threaded hole center；Z axis is moved to safety and returns to plane.
When processing the machining area where starting point is No. 1 region, screw thread starting point are as follows: X=R51, Y=0, Z=R53,
CR=R52 cuts full circle to X=0Y=0Z=R9I=-R51J=0 counterclockwise.
When processing the machining area where starting point is No. 2 regions, screw thread starting point are as follows: X=0, Y=-R51, Z=R53,
CR=R52 cuts full circle to X=0, Y=0, Z=R9, I=0, J=R51 counterclockwise.
When processing the machining area where starting point is No. 3 regions, screw thread starting point are as follows: X=-R51, Y=0, Z=R53,
CR=R52 cuts full circle to X=-R51, Y=0, Z=R53, CR=R52 counterclockwise.
When processing the machining area where starting point is No. 4 regions, screw thread starting point are as follows: X=0, Y=R51, Z=R53,
CR=R52 cuts full circle to X=0, Y=0, Z=R9, I=0, J=-R51 counterclockwise.
The present invention has the following advantages and beneficial effects:
1. removing not full thread, precision machining by mechanical equipment processing method；
2. saving the energy of pincers worker and saving grinding apparatus；
3. highly-safe.
Detailed description of the invention
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 threaded hole center,
It is set as coordinate origin；
Fig. 2 is milling not full thread schematic diagram (machining area 1)；
Wherein, 1 is workpiece；2 be milling cutter；
A is benchmark plane；B is that safety returns to plane；L is that safety returns to plane and datum plane distance；
S is processing not full thread starting point；R50 is milling cutter radius；R51 is coordinate origin 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-threaded 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 point is 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 °.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
The invention belongs to the processing methods in core main pump processing and manufacturing field, remove 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 in this way in assembling process, full thread part cannot not scratch kingbolt surface, and be convenient for main spiral shell
Bolt and safety of the main thread hole to assembly just, is increased, convenient for assembly.Equipment is used to produce for PAMA company, Italy
SPEEDRAM2000 numerical control boring and milling center, using SIEMENS840 language system.
First: the unification of machining benchmark.It is with workpiece end face as datum plane when processing screw thread and not full thread
It is processed, and the safety 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 one screw pitch of every 360 degree generations, is such as schemed
3, a circumference is divided into 4 equal parts, forms 4 regions, each region is 1/4 circumference i.e. 90 degree, the processing starting in No. 1 region
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 screw pitch is connected with helical wire form, i.e., 360 degree are 1 screw pitch, so
Each region is generated with the distance of 1/4 screw pitch.
Third: the determination of starting point is processed.When processing screw thread, observation threaded end forms incomplete with workpiece end face
Which region screw position is in, and determines the input parameter for determining program behind region again.
4th: being processed by the way of upmilling.According to determining different zones, different working depths is determined, it will
Cutter determines at working depth, using upmilling, i.e., milling is carried out from inner past end face, since phase has been determined at principle first
With machining benchmark, therefore using the processing method of from inside outwards milling, that is, ensure that cannot be milled into the adjacent complete of the inside
Thread tooth makes its processing have safety.
It as shown in Figs. 1-2, 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 it is No. 1 region, then the R1=in main program
1, if it is No. 2 regions then R1=2, and so on.When designing subprogram, avoids milling to adjacent buckle teeth, linked using 3 axis
Method is cut along helix angle roundlet (R52), is then enclosed along screw pitch full circle milling one, withdrawing, a hole machined are complete later.?
Select milling cutter when can any milling cutter diameter, as long as be no more than bore dia because have in subprogram calculate milling cutter radius.
Because program and thread milling program are the same machining benchmark planes thus, so when milling is not full thread as long as to a zero point
It can be with it is complete so hole that program can directly walk Continuous maching.This processing route is i.e. convenient and accurate.
Program description
Subprogram setting: R1=machining area, R2=reference planes, R3=working depth (must be screw pitch multiple), R9
=screw pitch, R10=return to safely plane, R21=threaded hole nominal diameter.
R1=1R2=0R9=3R10=L R21=115R50=10
R1=machining area is divided into 4 regions, and 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 plane.
R9=screw 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
It avoids interfering with datum plane when one hole, breaks workpiece surface.
R21=Major Diam.
R50=milling cutter radius.
；(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 cutter is moved to the linear distance of starting point.
R52=R51/2 milling cutter is moved to the radius of S point from working depth O '.
1/4 screw pitch of R53=R9/4,360 degree are a screw pitch, because being 4 machining areas, every 90
Degree is a machining area.
Screw pitch numerical value imparting R80 is used to calculate by R80=-R9.
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
G00 Z=R81 Z axis moves quickly into working depth required for No. 1 region.
G91 G64 is changed to incremental value programming by being worth absolutely, starts continuous path and executes program.
G03 X=R51 Y=0 Z=R53 CR=R52 is cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, Z
The distance of mobile 1/4 screw pitch of axis, cuts along lead angle.(G03 is program language, indicates rotation counterclockwise；CR is program word
Speech indicates cutter path radius)
G03 X=0 Y=0 Z=R9 I=-R51 J=0 cuts full circle counterclockwise, and X-axis Y-axis Origin And Destination is
Same point, Z axis move a screw pitch along helix.(I, J are coordinate of the center cutter S relative to coordinate origin O, are equal to
X, Y-coordinate)
G01 X=-R51 X-axis returns to threaded hole center.
G00 G90 G60 Z=R10 cancels standard and stops continuous path, and Z axis moves quickly into safety with absolute value
Return to plane.
GOTOF LABEL5, which jumps to target 5, terminates program.
LABEL2: target program 2.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
G00 Z=R82 Z axis moves quickly into working depth required for No. 2 regions.
G91 G64 is changed to incremental value programming by being worth absolutely, starts continuous path and executes program.
G03 X=0 Y=-R51 Z=R53 CR=R52 is cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis moves
The distance of dynamic 1/4 screw pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=0 J=R51 cuts full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axis moves a screw pitch along helix.
G01 Y=R51 X-axis returns to threaded hole center.
G00 G90 G60 Z=R10 cancels standard and stops continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5, which jumps to target 5, terminates program.
LABEL3: target program 3.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
G00 Z=R83 Z axis moves quickly into working depth required for No. 3 regions.
G91 G64 is changed to incremental value programming by being worth absolutely, starts continuous path and executes program.
G03 X=-R51 Y=0 Z=R53 CR=R52 is cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis moves
The distance of dynamic 1/4 screw pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=R51 J=0 cuts full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axis moves a screw pitch along helix.
G01 X=R51 X-axis returns to threaded hole center.
G00 G90 G60 Z=R10 cancels standard and stops continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5, which jumps to target 5, terminates program.
LABEL4: target program 4.
G00 G90 Z=R2 Z axis moves quickly into datum plane.
G00 Z=R84 Z axis moves quickly into working depth required for No. 4 regions.
G91 G64 is changed to incremental value programming by being worth absolutely, starts continuous path and executes program.
G03 X=0 Y=R51 Z=R53 CR=R52 is cut counterclockwise, and X-axis Y-axis is moved to screw thread starting point, and Z axis is mobile
The distance of 1/4 screw pitch, cuts along lead angle.
X=0 Y=0 Z=R9 I=0 J=-R51 cuts full circle counterclockwise, and X-axis Y-axis Origin And Destination is same point, Z
Axis moves a screw pitch along helix.
G01 Y=-R51 X-axis returns to threaded hole center.
G00 G90 G60 Z=R10 cancels standard and stops continuous path, and Z axis moves quickly into safety with absolute value and returns to plane.
GOTOF LABEL5, which jumps to target 5, terminates program.
LABEL5:M17 end of subroutine.
Claims (6)
1. a kind of method for milling for removing not full thread on numerical control boring and milling center, which comprises the following steps:
Using the end face of workpiece as processing screw thread and the datum plane of milling not full thread, what to be processed first of determination detained entirely
Position；
Determine the machining area where processing starting point；
According to determining different machining areas, different working depths is determined, cutter is determined at working depth, using inverse
Milling carries out milling from inner past end face；
It is described to determine cutter at working depth, using upmilling, i.e., milling is carried out from inner past end face, specifically: make Z axis first
It is moved to datum plane, then Z axis is made to be moved to required working depth；Cutting counterclockwise, center cutter is with arc form edge
Threaded line be cut into initial point position S point；Cutting full circle counterclockwise, X-axis, Y-axis starting point coordinate are identical as terminal point coordinate, Z axis
Coordinate from starting point moves a screw pitch along helix, and i.e. original coordinate+P, P is screw pitch to terminal；Return to X-axis in threaded hole
The heart；Z axis is moved to safety and returns to plane.
2. the method for milling according to claim 1 for removing not full thread on numerical control boring and milling center, which is characterized in that institute
It states machining area and is divided into four regions: using the X-axis of digital control system, Y-axis as reference axis, a circumference being 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 2 for removing not full thread on numerical control boring and milling center, which is characterized in that when
When machining area where processing starting point is No. 1 region, screw thread starting point are as follows: X=R51, Y=0, Z=R53, CR=R52, it is inverse
Hour hands cut full circle to X=0Y=0Z=R9I=-R51J=0；Wherein X, Y, Z represent reference axis；R51=R21/2-R50, R21
For Major Diam, R50 is milling cutter radius；R53=R9/4, R9 are screw pitch；CR is program language, indicates cutter path radius；R52
=R51/2；I represents X；J represents Y.
4. the method for milling according to claim 2 for removing not full thread on numerical control boring and milling center, which is characterized in that when
When machining area where processing starting point is No. 2 regions, screw thread starting point are as follows: 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；Wherein X, Y, Z represent reference axis；R51=R21/2-R50,
R21 is Major Diam, and R50 is milling cutter radius；R53=R9/4, R9 are screw pitch；CR is program language, indicates cutter path radius；
R52=R51/2；I represents X；J represents Y.
5. the method for milling according to claim 2 for removing not full thread on numerical control boring and milling center, which is characterized in that when
When machining area where processing starting point is No. 3 regions, screw thread starting point are as follows: 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；Wherein X, Y, Z represent reference axis；R51=R21/2-R50,
R21 is Major Diam, and R50 is milling cutter radius；R53=R9/4, R9 are screw pitch；CR is program language, indicates cutter path radius；
R52=R51/2.
6. the method for milling according to claim 2 for removing not full thread on numerical control boring and milling center, which is characterized in that when
When machining area where processing starting point is No. 4 regions, screw thread starting point are as follows: 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；Wherein X, Y, Z represent reference axis；R51=R21/2-
R50, R21 are Major Diam, and R50 is milling cutter radius；R53=R9/4, R9 are screw pitch；CR is program language, indicates cutter path
Radius；R52=R51/2；I represents X；J represents Y.
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| 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 |
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| JP2005040912A (en) * | 2003-07-24 | 2005-02-17 | Takamatsu Machinery Co Ltd | Machining device |
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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 |
| 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 |
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