CN102411334A - Plunge milling cutter path optimization method - Google Patents
Plunge milling cutter path optimization method Download PDFInfo
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- CN102411334A CN102411334A CN2011103046183A CN201110304618A CN102411334A CN 102411334 A CN102411334 A CN 102411334A CN 2011103046183 A CN2011103046183 A CN 2011103046183A CN 201110304618 A CN201110304618 A CN 201110304618A CN 102411334 A CN102411334 A CN 102411334A
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Abstract
The invention provides a plunge milling cutter path optimization method. Each plunge milling cutting path cycle comprises a slow drop processing cutter path. The method comprises the following steps: step 1: according to a plunge milling processing cutter tool path and a blank characteristic, calculating and adding a slow drop processing cutter path, and generating a corresponding cutter location point and a cutter axis vector; step 2: according to the cutter location point, the cutter axis vector and a part characteristic, calculating and adding the cutter paths of plunge milling feed, plunge milling moving and rapid return, and calculating and optimizing a plunge milling depth of each cutting path of the plunge milling so that the plunge milling depth of one knife after being processed by the plunge milling is shallower than the plunge milling depth of the previous knife. The slow drop feed and the each step plunge milling depth can effectively prolong a service life of the cutter. The moving and the rapid return can effectively improve surface quality of part processing and substantially shorten plunge milling processing time. The method can be widely used in three axis, four axis and five axis plunge milling processing.
Description
Technical field:
The present invention relates to the milling cutter path planning, specifically provide a kind of insert mill the cutter path optimization method of processing, be applicable to all kinds of aviation impellers, die cavity spare slotting milled processing.
Background technology:
Slotting milling is a kind of job operation that realizes high resection rate metal cutting.For the bigger processing of length that overhangs of the Machining of Curved Surface of difficult-to-machine material, grooving processing and cutter, the working (machining) efficiency of inserting milling is higher than conventional face milling method far away.In addition, insert and to mill processing and also have the following advantages: can reduce workpiece deformation; Can reduce the radial cutting force that acts on milling machine, this means that a main shaft that axle system has worn and torn still can be used for inserting mills processing and can not influence the workpiece processing quality; The cutter length that overhangs is bigger, and this Milling Process for workpiece groove or surface is very favourable; Can realize grooving processing to high-temperature alloy material.Slotting milling is fit to the roughing of mold cavity very much, and the recommended highly-efficient processing that is used for the aviation parts.
Existing slotting milling cutter paths planning method often concentrates on the cutter track planning of participating in cutting tip, and has ignored the integrated planning that comprises advance and retreat cutter process in slotting the milling.Ignore this two significant process, when feed, cause the impact to cutter easily, thereby cause crumbling of blade, when withdrawing, the original place usually can scratch surface of the work along the cutter axis orientation withdrawing, and the harm cutter.In order to protect cutter, adopt lower speed of feed when way is for withdrawing usually.In addition, the depth relationship of per step between inserting and milling do not plan, causes part to plug in the milling cutter road and cut wide unexpected increase when milling to the bottom inserting, and damages cutter.
Literature search through to prior art is found; Application number is 200810246906.6 Chinese patent " five slotting milling methods of a kind of aero-engine casing "; Its cutter path planning main method is on the basis of the cutter path of existing end mill processing; Generate and insert milling path, do not relate to the planning of inserting advance and retreat cutter technology when milling; Application number is in 200910219433.5 the Chinese patent " closed type integrated leaf dish five coordinates are inserted milling method ", also mills the integrated planning that processing comprises the cutter of advancing and retreat to inserting.
Summary of the invention:
The objective of the invention is deficiency, proposed the slotting cutter path optimization method of processing that mills of a cover to existing slotting milling path planing method.Its impact that can effectively solve when inserting incision workpiece when milling is excessive, problem such as cutter scratch workpiece during withdrawing.And can improve the existing efficient of milling processing of inserting greatly.
According to an aspect of the present invention; A kind of slotting milling cutter method for optimizing route is provided; Each plug in milling cutter road circulation comprises the slow process tool route that falls; Comprise following steps: step 1): mill process tool route and blank characteristic according to inserting, calculate and add to delay and fall process tool route, generate corresponding cutter location and generating tool axis vector.
Preferably; Each plug in milling cutter road circulation comprises inserting mills feed, the slotting cutter path that moves cutter, rapid return that mills; Comprise following steps: step 2): according to cutter location, generating tool axis vector and part feature, calculate and add to insert and mill feed, the slotting cutter path that moves cutter, rapid return that mills.
Preferably, comprise following steps: step 3): the plug in milling cutter road circulation of each single step is coupled together, generate the cutter location file of standard.
Preferably,, calculate and the slotting slotting degree of depth of milling that respectively goes on foot cutter track of milling of optimization, make and insert the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of milling back one cutter according to slotting milling cutter path and part feature.-
Preferably, the slow cutter path that falls that each plug in milling cutter road circulation is comprised, the speed of feed that cutter is initially cut workpiece is littler than the speed of feed of normal process.
Preferably, cutter moves to the direction away from the workpiece sidewall after accomplishing the cutwork of inserting in the circulation of milling cutter road, and rapid return is then accomplished to insert and milled circulation.
Preferably, by inserting the order that the milling cutter road generates, the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of inserting a back cutter that mills.
Preferably, the withdrawing cutter track adopts high speed of feed.
Preferably, the high speed of feed of withdrawing cutter track employing is the top speed of lathe.
More particularly, technical scheme of the present invention is: a kind of slotting milling cutter method for optimizing route, and its optimization method is following:
1) mills machining path and part geometry shape according to existing inserting, calculate the slow process tool route that falls;
2) according to the slow excessively cutter path that falls processing of resultant increase, calculate to insert to mill and move cutter, rapid return, each step of optimization inserts and mills the cutter path of the degree of depth;
Principle of work of the present invention is: at first according to cutter location and generating tool axis vector, and the geometric data of surface of the work, calculate single step and insert slow the falling a little when milling, and generate corresponding cutter location and generating tool axis vector; Again according to cutter location, generating tool axis vector, workpiece calculates feasible withdrawing position, and generates corresponding cutter location and generating tool axis vector; Circulation with the plug in milling cutter road of each single step at last couples together, and the cutter location file of the standard of generation.
Wherein calculating slowly when falling cutter track, comprising the speed planning that falls cutter track to slow.Slow cutter track of falling is the cutter track of cutter when just having got into workpiece, and this moment is bigger to the impact of cutter, therefore gives lower speed of feed.
When calculating moved the cutter cutter track, the feasible cutter direction of moving referred to fix a cutting tool to move in this direction can not interfere with workpiece.Owing to move the cutter cutter track and make cutter leave workpiece, so the withdrawing cutter track can adopt higher speed of feed, is generally the top speed of lathe.
When cutter track slotting milled the degree of depth before and after the computation optimization, cut wide unexpected increase, should guarantee the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of back one cutter in order to prevent cutter.
The slotting milling path planing method of being set forth among the present invention can be used to slotting in various 3 dimension spaces and mill processing, therefore can be adaptable across 3, and 4, insert for 5 and mill processing.
Beneficial effect of the present invention comprises: slow fall feed and each step and insert and mill depth optimization and effectively improved cutter life; Move cutter, rapid return effectively improves the surface quality of part processing, and has shortened greatly and inserted the time of milling processing.
Description of drawings
Fig. 1 is a synoptic diagram of inserting the milling mode of motion that mills.
Fig. 2 is the synoptic diagram according to the plug in milling cutter road of the moulding generation of part.
Fig. 3 is the slow synoptic diagram that cutter track is calculated that falls.
Fig. 4 is the synoptic diagram that moves cutter and rapid return cutter track.
Fig. 5 inserts to mill the slotting depth optimization synoptic diagram that mills of each step.
The practical implementation method
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Mainly based on inserting the processing mode that mills, the direction of feed when its characteristics are milling is axial along cutter 1 for the planing method in this slotting milling cutter path, is applicable to 2 processing of the bigger workpiece of axial cutting-in, and is as shown in Figure 1.
A kind of implementation method of the present invention is following:
1, calculate to insert according to the sidewall 11 of institute's cutting workpiece and bottom surface 12 and mill machining path:
According to the sidewall 11 and bottom surface 12 data points of part and process needed surplus and generate the corresponding milling cutter path of inserting, the bottom surface inserts that to mill surplus be 1mm in this example, and the sidewall surplus is 0.8mm.During calculating sidewall ruled surface and workpiece bottom biasing are intersected, can obtain the basic milling cutter path of inserting, shown in Fig. 2.
2, mill machining path according to resulting inserting, calculate the slow process tool route that falls:
According to the sidewall upper sideline 21 of part or blank and the diameter of cutter 1, as shown in Figure 3, calculate the coordinate points that cutter is initially cut workpiece, be that benchmark change feed value is 100mm/min with this point.Set the slow distance of falling in this example and be 1mm, promptly cutter gets into after the workpiece 1mm, inserts with this material normal and mills speed 200mm/min and insert and mill.
3, according to the slow excessively cutter path that falls processing of resultant increase, calculate to insert to mill and move cutter, the cutter path of rapid return:
As shown in Figure 4, according to residue black skin, workpiece sidewall; And the plug in milling cutter road that calculates in the first step; Being that criterion calculates the direction vector that cutter moves away from work surface, and the withdrawing of setting according to this example is apart from 1mm, the coordinate figure of the cutter shift position of calculating.According to the axial vector of cutter, calculate the coordinate of withdrawing point again, and the speed of feed during the change withdrawing is the top speed of lathe.Insert mill get into 32, insert mill move cutter 33, to insert the path of milling withdrawing 34 as shown in Figure 4.
4, according to the cutter track that obtained in the last step, calculate the slotting degree of depth of milling that respectively goes on foot cutter track, make and insert the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of milling back one cutter:
As shown in Figure 5, insert according to a last step cutter track and to mill the degree of depth 43, optimize this step cutter track and insert and mill the degree of depth 42, make this step cutter track slotting mill the degree of depth 42 and be shallower than and go on foot the slotting degree of depth of milling of cutter track.
5, generate to comprise to delay and fall, feed moves cutter, and the slotting of rapid return milled circulation and connects cutter generation cutter path:
Tool position and vector that above-mentioned three steps are calculated connect, and are output as the code format that lathe can be discerned.
Claims (9)
1. a slotting milling cutter method for optimizing route is characterized in that, each plug in milling cutter road circulation comprises delaying falls process tool route, comprises following steps:
Step 1): mill process tool route and blank characteristic according to inserting, calculate and add to delay and fall process tool route, generate corresponding cutter location and generating tool axis vector.
2. slotting milling cutter method for optimizing route according to claim 1 is characterized in that, the circulation of each plug in milling cutter road comprises inserting mills feed, inserts and mill the cutter path that moves cutter, rapid return, comprises following steps:
Step 2):, calculate and add to insert and mill feed, the slotting cutter path that moves cutter, rapid return that mills according to cutter location, generating tool axis vector and part feature.
3. slotting milling cutter method for optimizing route according to claim 2 is characterized in that, comprises following steps:
Step 3): the plug in milling cutter road circulation of each single step is coupled together, generate the cutter location file of standard.
4. slotting milling cutter method for optimizing route according to claim 2 is characterized in that, according to slotting milling cutter path and part feature, calculates and the slotting slotting degree of depth of milling that respectively goes on foot cutter track of milling of optimization, makes and inserts the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of milling back one cutter.
5. slotting milling cutter method for optimizing route according to claim 1 is characterized in that, the slow cutter path that falls that each plug in milling cutter road circulation is comprised, and the speed of feed that cutter is initially cut workpiece is littler than the speed of feed of normal process.
6. slotting milling cutter method for optimizing route according to claim 2 is characterized in that, cutter moves to the direction away from the workpiece sidewall after accomplishing the cutwork of inserting in the circulation of milling cutter road, and rapid return is then accomplished to insert and milled circulation.
7. according to claim 2-as to insert the milling cutter method for optimizing route, it is characterized in that, by inserting the order that the milling cutter road generates, the slotting slotting depth as shallow of milling of milling the last cutter of depth ratio of inserting a back cutter that mills.
8. slotting milling cutter method for optimizing route according to claim 2 is characterized in that the withdrawing cutter track adopts high speed of feed.
9. slotting milling cutter method for optimizing route according to claim 2 is characterized in that, the high speed of feed that the withdrawing cutter track adopts is the top speed of lathe.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735481A (en) * | 2016-12-28 | 2017-05-31 | 贵州黎阳国际制造有限公司 | A kind of processing method of aviation parts blind slot |
| CN106735464A (en) * | 2015-11-24 | 2017-05-31 | 西安航空动力控制科技有限公司 | A kind of slotting milling method of workpiece |
| TWI587950B (en) * | 2015-04-10 | 2017-06-21 | Hsin Tien Chang | Butterfly milling method |
| CN108274206A (en) * | 2017-12-15 | 2018-07-13 | 上海电机学院 | A kind of 3 d impeller Z-shaped feed becomes the withdrawing method of the slotting milling of axis |
| CN110355409A (en) * | 2019-05-27 | 2019-10-22 | 无锡动力工程股份有限公司 | A kind of concave surface processing design method |
| CN111215675A (en) * | 2020-02-10 | 2020-06-02 | 大连理工大学 | Plunge milling machining method for open type two-dimensional cavity |
| CN111819504A (en) * | 2017-12-06 | 2020-10-23 | 德普技术公司 | System, method and apparatus for tool path virtualization and optimization |
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| CN101767218A (en) * | 2008-12-30 | 2010-07-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Five-axis plunge milling method of aeroengine crankcase |
| CN102085576A (en) * | 2010-12-29 | 2011-06-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Five-axis linkage variable-axis plunge milling numerically controlled processing method for blade part of integral impeller |
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| CN101767218A (en) * | 2008-12-30 | 2010-07-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Five-axis plunge milling method of aeroengine crankcase |
| CN102085576A (en) * | 2010-12-29 | 2011-06-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Five-axis linkage variable-axis plunge milling numerically controlled processing method for blade part of integral impeller |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI587950B (en) * | 2015-04-10 | 2017-06-21 | Hsin Tien Chang | Butterfly milling method |
| CN106735464A (en) * | 2015-11-24 | 2017-05-31 | 西安航空动力控制科技有限公司 | A kind of slotting milling method of workpiece |
| CN106735464B (en) * | 2015-11-24 | 2018-12-14 | 西安航空动力控制科技有限公司 | A kind of slotting milling method of workpiece |
| CN106735481A (en) * | 2016-12-28 | 2017-05-31 | 贵州黎阳国际制造有限公司 | A kind of processing method of aviation parts blind slot |
| CN111819504A (en) * | 2017-12-06 | 2020-10-23 | 德普技术公司 | System, method and apparatus for tool path virtualization and optimization |
| CN111819504B (en) * | 2017-12-06 | 2023-10-10 | 赫克斯冈技术中心 | Systems, methods, and apparatus for tool path virtualization and optimization |
| CN108274206A (en) * | 2017-12-15 | 2018-07-13 | 上海电机学院 | A kind of 3 d impeller Z-shaped feed becomes the withdrawing method of the slotting milling of axis |
| CN108274206B (en) * | 2017-12-15 | 2020-07-07 | 上海电机学院 | Tool retracting method for Z-shaped feed variable-shaft plunge milling of ternary impeller |
| CN110355409A (en) * | 2019-05-27 | 2019-10-22 | 无锡动力工程股份有限公司 | A kind of concave surface processing design method |
| CN111215675A (en) * | 2020-02-10 | 2020-06-02 | 大连理工大学 | Plunge milling machining method for open type two-dimensional cavity |
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| CN102411334B (en) | 2013-11-20 |
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Address after: 200240 800 Dongchuan Road, Shanghai, Minhang District, Shanghai. Co-patentee after: Shanghai Tuopu CNC Polytron Technologies Inc Patentee after: Shanghai Jiao Tong University Address before: 200240 800 Dongchuan Road, Shanghai, Minhang District, Shanghai. Co-patentee before: Shanghai Putuo Numerical Control Technology Co., Ltd. Patentee before: Shanghai Jiao Tong University |