CN107679299A - From inserting type bidimensional die cavity high-efficient milling tool path planning method - Google Patents
From inserting type bidimensional die cavity high-efficient milling tool path planning method Download PDFInfo
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- CN107679299A CN107679299A CN201710854342.3A CN201710854342A CN107679299A CN 107679299 A CN107679299 A CN 107679299A CN 201710854342 A CN201710854342 A CN 201710854342A CN 107679299 A CN107679299 A CN 107679299A
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Abstract
The invention provides one kind from inserting type bidimensional die cavity high-efficient milling tool path planning method, the machining area is divided according to the division rule, and the center of generation is defined as to the new machining area, division again is carried out to the new machining area until reaching stop condition；The final angular region, final center are set in using section milling cutter road, the biasing cutter track with correction of the flank shape use in the final bias area, and combines working process parameter, formation is directed to the milling cutter track of the bidimensional die cavity.Should be from inserting type bidimensional die cavity high-efficient milling tool path planning method, the tool path planning being combined using section milling cutter road and the biasing cutter track with correction of the flank shape is designed, again by being designed from the tool path planning of mutually embedding multiple division center, ratio of the biasing cutter track in whole cutter track with correction of the flank shape is improved.The present invention ensures that milling cutter radial cutting force suffered in milling process is controlled effectively, and processing efficiency is improved while milling process secured premise is ensured.
Description
Technical field
The present invention relates to one kind from inserting type bidimensional die cavity high-efficient milling tool path planning method.
Background technology
Bidimensional die cavity is a kind of typical, common machining feature, is widely present among common mechanical part.Bidimensional die cavity
The spill that the normal from the more connected regions of plane along plane is formed to the inside continuous moving of part can be defined as
Shape, as shown in Figure 1.
Milling Machining is a kind of process of conventional cutting.Milling Machining is on the mobile removal motion track by milling cutter
With the material of surrounding, required shape is formed.The envelope that the planar movement of milling cutter is formed is a bidimensional die cavity.Therefore, advise
The Milling Machining of standardized individual bidimensional die cavity is equal to the planning milling in the more connected regions of plane (calling region in the following text) for defining bidimensional die cavity
The track (calling cutter track in the following text) of knife motion.
Cutter track is made up of some sections of end to end curves, can be by one " cutter lifting-connection-lower knife " between every section of curve
Path be connected.The basic object of tool path planning is in the border in region, when the curvature radius of circle on border is more than or equal to
Cutter track is generated under conditions of milling cutter radius so that cutter can intactly realize the shape of die cavity after moving end along cutter track.
On the premise of reaching this purpose, the optimization aim of tool path planning includes shortening process time (raising efficiency), reduces cutter
Wear (raising cutting wear) etc..
Milling cutter can be acted on when removing workpiece material by cutting force.Cutting force can be decomposed into axially (i.e. Z-direction)
With the component in radially (i.e. X-Y directions).Wherein, influence of the radial component to process and cutter is maximum.Radial component is excessive
When can cause such as the phenomenon of system of processing flutter, cutter tipping or breaking, so as to cause processing accident.Based on theory of metal cutting
(as shown in Figure 2), when holding shaft is to back engagement of the cutting edge apWith speed of mainshaft vcUnder conditions of constant, cutting for radial component size is influenceed
It is radial direction bite a to cut dosage parametereWith feed speed vf.Under usual processing conditions, even if feed speed vfKeep constant,
Cutter track change in shape can also cause actual radial direction bite aeChange, so as to cause the change of radial component.Therefore, radially
In the case that component size is unable to manual control, in order to prevent the radial component from exceeding safe range, generally use it is conservative compared with
Small axial back engagement of the cutting edge apWith feed speed vf, the safety of process is exchanged for sacrifice processing efficiency.
In other words, can be by increasing axial back engagement of the cutting edge a if radial component change is controllablepWith feed speed vfCarry
High stock-removing efficiency.The two kinds of conventional cutter track forms realized this purpose at present and used are section milling cutter roads (such as Fig. 3 to Fig. 4 institutes
Show) and biasing cutter track (as shown in Figure 5) with correction of the flank shape.
As shown in Figure 3 and Figure 4, section milling cutter road can use one group of ring-shaped cutter track to realize.Company of the cutter in direction of feed
Cut in continuous curve such as circular arc cutter track.The opposite direction cutter track of direction of feed is the return course of cutter.Return course can be with
It is single circular arc or a plurality of curve composition.It can be controlled by two distances in direction of feed adjacent annular curve of adjustment actual
Radial direction bite, reach the purpose of control radial component.The advantages of section milling cutter road is that the envelope formed in tool motion is worked as
In without residual, i.e., the place not switched to, shortcoming is that cutter does not participate in cutting in return course, therefore reduces processing
Efficiency.
As shown in figure 5, the biasing cutter track with correction of the flank shape is on the basis of original iso-metric offset cutter track, become big in radial load
Position carries out correction of the flank shape, and actual radial direction bite is controlled by reducing the distance of adjacent two cutter tracks.Due to except correction of the flank shape cutter track
Returning part outside, cutter is carried out continuously cutting, so the biasing cutter track efficiency with correction of the flank shape is higher than section milling cutter road.Therefore, carry
Ratio of the biasing cutter track of high band correction of the flank shape in whole cutter track can further improve stock-removing efficiency.
The content of the invention
The technical problems to be solved by the invention are to overcome the cutter track used in the prior art to carry out bidimensional die cavity
During Milling Process, radial component be not effectively controlled caused processing efficiency and low security the defects of, and provide a kind of
From inserting type bidimensional die cavity high-efficient milling tool path planning method.
The present invention solves above-mentioned technical problem by the following technical programs：
The invention provides one kind from inserting type bidimensional die cavity high-efficient milling tool path planning method, comprise the following steps：
Machining area is divided into the division rule of angular region, bias area, center by setting；
Set the stop condition that the machining area stops division；
The shape for the bidimensional die cavity being pre-designed is imported, by the two-dimensional projection perpendicular to milling cutter axis of the bidimensional die cavity
Face is defined as the machining area；
The machining area is divided according to the division rule, and by the center of generation be defined as it is new described in
Machining area；
Examine whether the new machining area meets the stop condition for stopping division；If so, then stop division；If no
It is that then the new machining area is divided again；
Multiple angular regions that multiple division is formed are added to form final angular region, multiple division formed multiple described
Bias area is added to form final bias area, and last time is divided to the center formed and is set as final center；
The final angular region, final center are set in using section milling cutter road, is repaiied in the final bias area using band
The biasing cutter track of shape, and working process parameter is combined, form the milling tool cutter track for the bidimensional die cavity；
The milling cutter track is converted to the digital control implement of control instruction input lathe, the digital control implement control milling cutter of the lathe
Milling is carried out to the bidimensional die cavity.
It is preferred that the machining area is divided into the division rule of the angular region, bias area, center by setting, including,
The division rule is：
The angular region for the machining area a part of continuum boundary form curve and be inscribed within the endpoint curve to
The region that the arc section of direction of a curve indent surrounds, the part continuum boundary curve must not point-blank, and exist in
It is cut in the inscribed circle of the curve two-end-point；
The bias area removed with the machining area obtain behind the angular region be shaped as border, by the border inwardly with
When wave surface mode propagates certain distance, region that wave surface is inswept；
The center is that the wave surface to form the bias area fails inswept interior zone.
It is preferred that examining whether the new machining area meets the stop condition for stopping division；If so, then stop drawing
Point；If it is not, then the new machining area is divided again；Including：
The stop condition is the pre-set limit of the machining area minimum widith, when the machining area minimum widith reaches
Arrive or during less than pre-set limit, the machining area stops division.
It is preferred that the shape for the bidimensional die cavity being pre-designed is automatically imported, by the bidimensional die cavity perpendicular to milling cutter axis
Two-dimensional projection face be defined as the machining area, afterwards；
The machining area is divided according to the division rule, and by the center of generation be defined as it is new described in
Machining area, before；
Examine whether being automatically imported for the shape of the two-dimensional type chamber succeeds, if so, then carrying out the processing district in next step
The division in domain；If it is not, the shape of the bidimensional die cavity is then imported by the way of man-machine interaction.
It is preferred that being set in the final angular region, final center using section milling cutter road, adopted in the final bias area
With the biasing cutter track with correction of the flank shape, and working process parameter is combined, form the milling tool cutter track for the bidimensional die cavity, its
In, the working process parameter includes axial back engagement of the cutting edge, radial direction bite, feed speed and the speed of mainshaft of the milling cutter.
It is preferred that the milling cutter track is converted to the digital control implement of the control instruction input lathe, the number of the lathe
Control device control milling cutter and milling is carried out to the bidimensional die cavity, including：
The milling cutter track is converted into control instruction to input into the digital control implement of the lathe, the digital control implement of the lathe
The control instruction is converted into the controlled quentity controlled variable of the lathe, and the milling cutter is controlled to described according to the controlled quentity controlled variable of the lathe
Bidimensional die cavity carries out milling.
It is preferred that the biasing cutter track with correction of the flank shape is used in the final bias area, including：
Edge definition by the final bias area be border, when the border it is each while wave surface press while normal
When direction is towards the finally inside uniform motion of bias area, the wave surface and the collection of wave surface intersection point are collectively referred to as skeleton；
After the skeleton of the final bias area is obtained, the biasing knife of the final bias area is calculated based on the skeleton
Road.
It on the basis of common sense in the field is met, above-mentioned each optimum condition, can be combined, it is each preferably real to produce the present invention
Example.
The positive effect of the present invention is：
Should be from inserting type bidimensional die cavity high-efficient milling tool path planning method, using section milling cutter road and the biasing knife with correction of the flank shape
The tool path planning design that road is combined, then by being designed from the tool path planning of nested multiple division center, improve biasing
Ratio of the cutter track in whole cutter track.The present invention ensures that milling cutter radial cutting force suffered in milling process is effectively controlled
System, and then improve processing efficiency while milling process secured premise is ensured.
Brief description of the drawings
Fig. 1 is the structural representation of bidimensional die cavity involved in the present invention.
Fig. 2 is the schematic diagram of theory of metal cutting involved in the present invention.
Fig. 3 is the schematic diagram of the cycloid cutter track in section milling cutter road involved in the present invention.
Fig. 4 is the schematic diagram on the angular milling sharpener road in section milling cutter road involved in the present invention.
Fig. 5 is the schematic diagram of the biasing cutter track involved in the present invention with correction of the flank shape.
Fig. 6 is angular region involved in the present invention, bias area, the schematic diagram of center Division.
Fig. 7 is the schematic diagram that the machining area involved in the present invention forms skeleton by wave surface.
Fig. 8 is the schematic diagram of the machining area skeleton shown in Fig. 7.
Fig. 9 is using behind zoning of the invention from the progress of inserting type bidimensional die cavity high-efficient milling tool path planning method
Schematic diagram.
Figure 10 is to carry out the schematic diagram behind secondary zoning to center on the basis of Fig. 9.
Figure 11 is flow chart of the present invention from inserting type bidimensional die cavity high-efficient milling tool path planning method.
Figure 12 is the bidimensional die cavity from the processing of inserting type bidimensional die cavity high-efficient milling tool path planning method using the present invention
Cutter track schematic diagram.
Figure 13 is the schematic diagram of the radial load for the milling cutter surveyed in bidimensional die cavity process.
Description of reference numerals
Bidimensional die cavity 100
Angular region 110
Bias area 120
Border 121
Wave surface 122
Intersection point 123
Skeleton 124
Center 130
Milling cutter 200
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality
Apply among a scope.
The present invention provides one kind from inserting type bidimensional die cavity high-efficient milling tool path planning method, comprises the following steps：
The machining area surrounded by border 121 is divided into the division of angular region 110, bias area 120, center 130 by setting
Rule；
Set the stop condition that machining area stops division；
Import the shape for the bidimensional die cavity 100 being pre-designed, the two-dimensional projection by bidimensional die cavity 100 perpendicular to milling cutter axis
Face is defined as the machining area surrounded by border 121；
Machining area is divided according to division rule, and the center 130 of generation is defined as new machining area；
Examine whether new machining area meets the stop condition for stopping division；If so, then stop division；If it is not, then
New machining area is divided again；
Multiple angular regions 110 that multiple division is formed are added to form final angular region, multiple biasings that multiple division is formed
Area 120 is added and forms final bias area, and last time is divided to the center 130 formed and is set as final center；
Final angular region, final center are set in using section milling cutter road, the biasing with correction of the flank shape is used in final bias area
Cutter track, and working process parameter is combined, form the milling cutter track for bidimensional die cavity 100；
Milling cutter track is converted to the digital control implement of control instruction input lathe, the digital control implement of lathe produces controlled quentity controlled variable, control
The milling cutter 200 of lathe carries out milling to bidimensional die cavity 100.
By the way that to more than 130 division in center, the area increase of final bias area ultimately formed can be made, i.e., using band
The biasing cutter track of correction of the flank shape carries out the region area increase of milling, so as to further improve processing efficiency.
Wherein, division rule is：
The curve and be inscribed within the endpoint curve to curve side that angular region 110 is formed for a part of continuum boundary of machining area
The region that the arc section to concave surrounds, the part continuum boundary curve point-blank, and must not be present and are inscribed within this
The inscribed circle of curve two-end-point；
Bias area 120 is shaped as border with what is obtained behind machining area removal angular region, by the border inwardly with wave surface side
When formula propagates certain distance, region that wave surface is inswept.
Center 130 is that the wave surface for forming bias area fails inswept interior zone.
Schematic diagram after the completion of division is as shown in fig. 6, be angular region 110 positioned at corner, the area centered on center
130, between angular region 110, center 130 for bias area 120.
Medial-Axis Transformation provides Fundamentals of Mathematics for the advanced die cavity cutter track of planning.Medial-Axis Transformation can use the motion table of wave surface
State.The original shape of wave surface and position are the borders for defining die cavity plane domain.When border it is each while wave surface by while
Normal direction towards during uniform motion, wave surface and the set of wave surface intersection point are axis inside region, also known as skeleton or
Crestal line (calls skeleton in the following text).There is one-to-one relation in skeleton and the region for producing skeleton., can after the skeleton in some region is obtained
To calculate related biasing cutter track based on skeleton.The algorithm for calculating biasing cutter track using this kind of algorithm has more preferable stability.
The computational methods of the biasing cutter track with correction of the flank shape of final bias area are as shown in Figure 7 and Figure 8.By the side of final bias area
Edge is defined as border 121, when border 121 it is each while wave surface 122 by while normal direction towards in final bias area
During portion's uniform motion, wave surface 122 and the collection of the intersection point 123 of wave surface 122 are collectively referred to as skeleton 124；When obtaining final bias area
Skeleton 124 after, the biasing cutter track of final bias area is calculated based on skeleton 124.
Examine whether new machining area meets the stop condition for stopping division, can be that machining area presets minimum widith
Limit value, when the minimum widith of the machining area reaches or during less than pre-set limit, machining area stops division.
Fig. 9 is that bidimensional die cavity 100 is carried out from inserting type bidimensional die cavity high-efficient milling tool path planning method using the present invention
Schematic diagram after once dividing, Figure 10 are the schematic diagram after being divided again to center 130 on the basis of Fig. 9.From
Fig. 9 and Figure 10 contrast can be seen that division number it is more, center 130 just it is smaller, bias area 120 is bigger.Therefore, it is
Reach bias area 120 relative to the larger purpose of whole region proportion, the minimum widith of machining area can be set
Pre-set limit.When the minimum widith of machining area reaches or during less than pre-set limit, machining area stops division.
When the minimum widith of center 130 is less than pre-set limit, milling cutter 200 can not just be carried out to whole center 130
Section Milling Machining, i.e., the size of radial load can not be effectively controlled, therefore machining area stops division.
Final angular region, final center are set in using section milling cutter road, the biasing with correction of the flank shape is used in final bias area
Cutter track, and working process parameter is combined, the milling cutter track for bidimensional die cavity 100 is formed, wherein, working process parameter includes milling
The axial back engagement of the cutting edge a of knifep, radial direction bite ae, feed speed vfWith speed of mainshaft vc, as shown in Figure 2.
As shown in figure 11, the shape for the bidimensional die cavity 100 being pre-designed is automatically extracted, by bidimensional die cavity 100 perpendicular to milling
The two-dimensional projection face of cutter shaft line is defined as after machining area；Machining area is divided according to division rule.If automatically extract
The shape of bidimensional die cavity 100 is unsuccessful, then using the extracting method of man-machine interaction.
As shown in figure 11, milling cutter track is converted into the digital control implement of control instruction input lathe, digital control implement control lathe
Milling cutter carries out milling to bidimensional die cavity 100.
Figure 12 is the knife using the above-mentioned bidimensional die cavity from the processing of inserting type bidimensional die cavity high-efficient milling tool path planning method
Road schematic diagram.Figure 13 is the schematic diagram for the radial load surveyed in bidimensional die cavity process.As can be seen from Figure 13, actually adding
In work, no matter milling cutter 200 where, the radial load peak-peak that milling cutter 200 is actually born controls 1200 better
Newton or so.This result fully demonstrates validity of this method for milling in actual processing, big in effectively control radial load
On the premise of small, guarantee process safety, moreover it is possible to increase substantially processing efficiency.
The present invention is not limited to the above-described embodiments, no matter making any change in its shape or structure, all falls within this hair
Within bright protection domain.Protection scope of the present invention is defined by the appended claims, and those skilled in the art exists
On the premise of without departing substantially from principle and essence of the invention, various changes or modifications, but these can be made to these embodiments
Change and modification each fall within protection scope of the present invention.
Claims (7)
- It is 1. a kind of from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in that to comprise the following steps：Machining area is divided into the division rule of angular region, bias area, center by setting；Set the stop condition that the machining area stops division；The shape for the bidimensional die cavity being pre-designed is automatically imported, by the bidimensional die cavity perpendicular to the two-dimensional projection face of milling cutter axis It is defined as the machining area；The machining area is divided according to the division rule, and the center of generation is defined as to the new processing Region；Examine whether the new machining area meets the stop condition for stopping division；If so, then stop division；If it is not, then The new machining area is divided again；Multiple angular regions that multiple division is formed are added to form final angular region, multiple biasings that multiple division is formed Area is added to form final bias area, and last time is divided to the center formed and is set as final center；The final angular region, final center are set in using section milling cutter road, is used in the final bias area with correction of the flank shape Cutter track is biased, and combines working process parameter, forms the milling cutter track for the bidimensional die cavity；The milling cutter track is converted to the digital control implement of control instruction input lathe, the digital control implement of the lathe controls milling cutter to institute State bidimensional die cavity and carry out milling.
- 2. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatThe machining area is divided into the division rule of the angular region, bias area, center by setting, including, the division rule It is then：The curve and be inscribed within the endpoint curve to curve that the angular region is formed for a part of continuum boundary of the machining area The region that the arc section of direction indent surrounds, the part continuum boundary curve point-blank, and must not be present and are inscribed within The inscribed circle of the curve two-end-point；The bias area is shaped as border with what is obtained behind the machining area removal angular region, by the border inwardly with ripple battle array When face mode propagates certain distance, region that wave surface is inswept；The center is that the wave surface to form the bias area fails inswept interior zone.
- 3. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatExamine whether the new machining area meets the stop condition for stopping division；If so, then stop division；If it is not, then The new machining area is divided again；Including：The stop condition is the pre-set limit of the machining area minimum widith, reach when the machining area minimum widith or During less than pre-set limit, the machining area stops division.
- 4. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatThe shape for the bidimensional die cavity being pre-designed is automatically imported, by the bidimensional die cavity perpendicular to the milling cutter axis Two-dimensional projection face is defined as the machining area, afterwards；The machining area is divided according to the division rule, and the center of generation is defined as to the new processing Region, before；Examine whether being automatically imported for the shape of the two-dimensional type chamber succeeds, if so, then carrying out the next step machining area Division；If it is not, the shape of the bidimensional die cavity is then imported by the way of man-machine interaction.
- 5. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatThe final angular region, final center are set in using section milling cutter road, is used in the final bias area with correction of the flank shape Cutter track is biased, and combines working process parameter, forms the milling cutter track for the bidimensional die cavity, wherein, the processing technology Parameter includes axial back engagement of the cutting edge, radial direction bite, feed speed and the speed of mainshaft of the milling cutter.
- 6. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatThe milling cutter track is converted into the digital control implement that control instruction inputs the lathe, described in the digital control implement control of the lathe Milling cutter carries out milling to the bidimensional die cavity, including：The milling cutter track is converted into control instruction to input into the digital control implement of the lathe, the digital control implement of the lathe is by institute The controlled quentity controlled variable that control instruction is converted into the lathe is stated, and the milling cutter is controlled to the bidimensional according to the controlled quentity controlled variable of the lathe Die cavity carries out milling.
- 7. as claimed in claim 1 from inserting type bidimensional die cavity high-efficient milling tool path planning method, it is characterised in thatThe biasing cutter track with correction of the flank shape is used in the final bias area, including：Edge definition by the final bias area be border, when the border it is each while wave surface press while normal direction During towards the finally inside uniform motion of bias area, the wave surface and the collection of wave surface intersection point are collectively referred to as skeleton；After the skeleton of the final bias area is obtained, the biasing cutter track of the final bias area is calculated based on the skeleton.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110900134A (en) * | 2019-12-19 | 2020-03-24 | 佛山市成阳正大模具五金塑料有限公司 | Method for processing hardened cold stamping die steel of automobile |
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| CN110900134A (en) * | 2019-12-19 | 2020-03-24 | 佛山市成阳正大模具五金塑料有限公司 | Method for processing hardened cold stamping die steel of automobile |
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