CN110253066A - Five axis of integral wheel inserts the identification of top knife and the method for removing of Milling Machining - Google Patents
Five axis of integral wheel inserts the identification of top knife and the method for removing of Milling Machining Download PDFInfo
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- CN110253066A CN110253066A CN201910356878.1A CN201910356878A CN110253066A CN 110253066 A CN110253066 A CN 110253066A CN 201910356878 A CN201910356878 A CN 201910356878A CN 110253066 A CN110253066 A CN 110253066A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
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Abstract
Whether the top knife that the present invention provides a kind of slotting Milling Machining of five axis of integral wheel identifies and method for removing, comprising the following steps: S1, top knife identification: judging that the adjacent cutter bottom milled slotting twice is round and intersect, think to occur to push up knife phenomenon if intersection；S2, choose rotation basic point: i-th inserts the round extended surface for being formed by ruled surface with permutation tool axis in milling cutter bottom can be there are two intersection point, and the farther away intersection point of selected distance intersection is as rotation basic point；S3, top blade row remove: new tool axis and cutter location are obtained by rotation, S4, top knife detection: return step S1 is calculated with the presence or absence of top knife phenomenon, and if it exists, step S2 and step S3 is then repeated, until excluding to push up knife phenomenon.Five axis of integral wheel of the present invention inserts the identification of top knife and the method for removing of Milling Machining, knife problem is pushed up by adjusting generating tool axis vector and cutter location to exclude to insert milling, it avoids because the processing such as overload, vibration are abnormal caused by inserting milling top knife, guaranteeing that slotting Milling Machining is efficient simultaneously, is not influencing the efficiency of following process.
Description
Technical field
The present invention relates to integral wheels to insert Milling Machining field, specifically, more particularly to a kind of slotting milling trajectory planning of five axis
In top knife identification and method for removing.
Background technique
Slotting milling is also known as Z axis milling method, and stock-removing efficiency is 4~5 times higher than traditional milling, especially in the big of hard-cutting material
It is advantageous in terms of removal rate.Milling Machining is inserted along axial feed of the tool, has radial cutting force small, cutting stability is good, allows to adopt
The features such as with big L/D ratio cutter, is very suitable to the roughing of deep-small hole, deep trench class part.Slotting milling is current material removal effect
The higher cutting working method of rate, can significantly shorten process time.Current three axis inserts milling module, has been mainstream CAM software
Standard configuration, mold manufacture, aerospace structure part processing and other fields using more and more, achieve good application
Effect.But the presence due to inserting milling top knife problem, constrain application of the slotting milling technology in five-axis robot.
During inserting milling, in the presence of having top knife problem, workpiece machining surface will appear the current knife end for inserting milling often
The cutter end face trace occurrence of large-area that face trace and previous knife insert milling is interfered.The radial cutting-in currently processed is caused to increase suddenly
Greatly, chip-load moment is multiplied, and causes overload or biggish cutting vibration.In existing machining simulation technology, milling is inserted
Top knife was both not belonging to cut, and was also not belonging to interference and collision, can not be by existing CAM and machining simulation software automatic identification.
Have the research to slotting milling top knife problem, is all to avoid inserting milling top knife by gradually reducing slotting milling depth.Gradually
The slotting milling depth of reduction, which will lead to following process, will reduce slotting milling depth, and more chipping allowance, shadow will be remained to following process
Ring semi-finished efficiency.For three axis machining, because gradually reducing slotting milling depth, remaining material can be fast by facing cut method
Speed removal, but for integral wheel five-axis robot, milling depth method exclusion top knife, wheel hub surface residual are inserted according to gradually reducing
Workpiece material can only be removed by milling, seriously affect semi-finished efficiency.
Summary of the invention
According to the presence of slotting milling top knife set forth above, the technical issues of extreme influence processing efficiency, and a kind of entirety is provided
Five axis of impeller inserts the identification of top knife and the method for removing of Milling Machining.The present invention mainly utilizes the position to generation top knife by adjusting knife
Axial vector and cutter location greatly improve roughing efficiency to exclude top knife phenomenon.
The technological means that the present invention uses is as follows:
A kind of five axis of integral wheel inserts the identification of top knife and the method for removing of Milling Machining, comprising the following steps:
S1, top knife identification:
Milling Machining tool path data is inserted according to existing five conventional axis, establishes top knife identification model, analysis is arrived in slotting milling
Whether the bottom circle of adjacent slotting milling cutter opposite positional relationship when workpiece bottom judges the adjacent cutter bottom circle for inserting milling twice
Intersect, thinks that top knife phenomenon occurs if intersection.
S2, rotation basic point is chosen:
To exist top knife phenomenon position, i-th insert milling occur top knife, by i-th insert milling cutter generating tool axis vector and
Cutter location adjusts, friendship that there are two the round extended surface meetings that ruled surface is formed by with permutation tool axis in the slotting milling cutter bottom of i-th
Point, the farther away intersection point of selected distance intersection is as rotation basic point.
S3, top blade row remove:
The parameter that i-th inserts milling cutter axis is u, is adjusted the angle as biasing surface leaf top line parameter u- Δ u, Δ u=
0.001, biasing the leaf top line position parameter u and i-th on ruled surface and inserting the line in the milling cutter bottom center of circle is L1, biases ruled surface
The upper position Δ u leaf top line parameter u- and the angle of the line L2, L1 to L2 in the slotting milling cutter bottom center of circle of i-th areInserting milling
The cutter bottom center of circle and biasing ruled surface leaf top line parameter point u, the plane where parameter point u- Δ tri- points of u are interior slotting to i-th
The milling cutter bottom center of circle is rotated, and i-th is inserted the milling bottom center of circle around rotation basic point, inserting milling cutter radius is R, is with R
Half radial direction u → u- Δ u direction rotation, i.e., by AOu broken line around rotating basic point, parameter position u is rotatably moved to u- Δ u, and i-th
The new position that secondary slotting milling cutter bottom center of circle O is moved to just is cutter location O1, u- the Δ u and new cutter location that new i-th inserts milling
The line of O1 inserts the tool axis of milling as i-th.
S4, top knife detection:
Return step S1 is calculated with the presence or absence of top knife phenomenon, and if it exists, then repeat step S2 and step S3, continue through
Rotation obtains new tool axis and cutter location, until excluding to push up knife phenomenon.
Further, in step S1, the specific identification process of top knife identification calculates (i-1)-th time in the knife identification model of top
The intersection of plane inserts the distance of milling cutter bottom center of circle O to i-th where inserting milling and the slotting milling cutter bottom circle of i-th, if distance
Less than slotting milling cutter radius R, it is believed that adjacent to insert milling twice in the presence of top knife phenomenon.
Further, in step S2, tool axis is obtained by the ruled surface of blade profile normal bias, biasing surface
Leaf top line and blade root line are parameterized, and parameter value is [0,1], are corresponded to parameter point with blade root line by leaf top line and are connected acquisition
Tool axis.
Compared with prior art, five axis of integral wheel of the present invention inserts the identification of top knife and the exclusion side of Milling Machining
Method, judges whether the adjacent cutter bottom circle for inserting milling twice intersects, and thinks that top knife phenomenon occurs if intersection, to pushing up
The position of knife by adjusting cutter shaft and cutter location come exclude top knife phenomenon, may be implemented five axis insert milling roughing before cutter path
Automatic planning, can greatly improve roughing efficiency, and the cutter rail for not occurring to push up knife and interference can be directly generated by being programmed into software
Mark promotes 80% or more track planning efficiency, is a kind of slotting identification of top knife and exclusion milled in trajectory planning of five axis of integral wheel
Method.
Five axis of integral wheel of the present invention inserts the identification of top knife and the method for removing of Milling Machining, is inserted based on " biserial fluting "
Miller skill optimizes and solves the problems, such as the top knife in the potential cutter path planning of this technique.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the present invention inserts milling top knife identification model.
Fig. 2 is that the present invention excludes to insert milling top knife schematic diagram.
Fig. 3 is that cutter shaft of the present invention adjusts schematic diagram.
Fig. 4 is that the present invention excludes to push up knife figure by swivel knife shaft.
Fig. 5 is that the slotting milling top blade row of the present invention removes preceding cutter path schematic diagram.
Fig. 6 present invention inserts the cutter path schematic diagram after milling top blade row removes.
Integral wheel after Fig. 7 top blade row of the present invention removes inserts Milling Machining effect picture.
Specific embodiment
As shown, the present invention provides the identification of top knife and method for removing that a kind of five axis of integral wheel inserts Milling Machining, packet
Include following steps:
S1, top knife identification:
Milling Machining tool path data is inserted according to existing five conventional axis, establishes top knife identification model, as shown in Figure 1, point
The opposite positional relationship of the bottom circle of the adjacent slotting milling cutter when inserting milling and arriving workpiece bottom is analysed, judges the adjacent cutter for inserting milling twice
Whether bottom circle intersects, and thinks that top knife phenomenon occurs if intersection；The specific identification process for pushing up knife identification, in top knife identification
In model, the intersection for calculating plane where inserting milling and the slotting milling cutter bottom circle of i-th (i-1)-th time inserts milling cutter bottom to i-th
The distance of center of circle O, if distance, which is less than, inserts milling cutter radius R, it is believed that adjacent milling slotting twice has top knife phenomenon.
S2, rotation basic point is chosen:
To exist top knife phenomenon position, i-th insert milling occur top knife, by i-th insert milling cutter generating tool axis vector and
Cutter location adjusts, friendship that there are two the round extended surface meetings that ruled surface is formed by with permutation tool axis in the slotting milling cutter bottom of i-th
Point, the farther away intersection point of selected distance intersection is as rotation basic point, as shown in Figure 3；Tool axis is by blade profile normal bias
Ruled surface obtain, the leaf top line and blade root line of biasing surface parameterized, and parameter value is [0,1], by leaf top line and
Blade root line corresponds to parameter point connection and obtains tool axis.
S3, top blade row remove:
The parameter that i-th inserts milling cutter axis is u, is adjusted the angle as biasing surface leaf top line parameter u- Δ u, Δ u=
0.001, biasing the leaf top line position parameter u and i-th on ruled surface and inserting the line in the milling cutter bottom center of circle is L1, biases ruled surface
The upper position Δ u leaf top line parameter u- and the angle of the line L2, L1 to L2 in the slotting milling cutter bottom center of circle of i-th areInserting milling
The cutter bottom center of circle and biasing ruled surface leaf top line parameter point u, the plane where parameter point u- Δ tri- points of u are interior slotting to i-th
The milling cutter bottom center of circle is rotated, and i-th is inserted the milling bottom center of circle around rotation basic point, is half radial direction u → u- Δ side u with R
To rotation, i.e., by AOu broken line around rotation basic point, as shown in Figure 3 and Figure 4, parameter position u is rotatably moved to u- Δ u, and i-th
The new position that secondary slotting milling cutter bottom center of circle O is moved to just is cutter location O1, u- the Δ u and new cutter location that new i-th inserts milling
The line of O1 inserts the tool axis of milling as i-th.
S4, top knife detection:
Return step S1 is calculated with the presence or absence of top knife phenomenon, and if it exists, then repeat step S2 and step S3, continue through
Rotation obtains new tool axis and cutter location, until excluding to push up knife phenomenon, as shown in Figure 2.
Five axis of integral wheel of the present invention inserts the identification of top knife and the method for removing of milling, can be to five axis of preliminary planning
It inserts Milling Machining track to test and optimize, the pre-identification before can processing the cutter path of the slotting Milling Machining of five axis is sentenced
It is disconnected whether to occur to push up knife.If top knife occurs, the method for generating tool axis vector adjustment is taken to exclude top knife.Design can be greatlyd save
The design time and energy of personnel, improves efficiency and can guarantee accuracy, prevents from generating top knife phenomenon in process, to knife
Tool, workpiece and lathe damage, and are a kind of slotting top knife identification milled in trajectory planning of five axis and method for removing.
Five axis of integral wheel of the present invention inserts the identification of top knife and the method for removing of milling, is related to five axis of integral wheel and inserts milling
The cutter path of processing plans that this method, which is applied in machining software, automatically generates nc program for actual production.
Five axis of integral wheel of the present invention inserts the identification of top knife and the method for removing of Milling Machining, by adjusting generating tool axis vector
It excludes to insert milling top knife problem with cutter location, the processing exception such as overload, vibration caused by avoiding because of slotting milling top knife is guaranteeing to insert
Milling Machining is efficient simultaneously, does not influence the efficiency of following process.
Embodiment 1
As shown in Figures 1 to 7, the top knife for inserting milling the present invention provides a kind of five axis of integral wheel identifies and method for removing,
Specifically includes the following steps:
Step 1: during five axis insert Milling Machining, the adjacent cutter bottom end for inserting milling twice is denoted as Oi-1、Oi, wherein preceding primary
Slotting milling is denoted as cutter shaft i-1, and rear primary insert mills as cutter shaft i, as shown in Figure 1.When plugging in the knife generation of milling top, the milling cutter bottom of cutter shaft i
Circle OiNot completely in the bottom cutter shaft i-1 circle Oi-1Top, contact the unprocessed region cutter shaft i-1, it is meant that insert Milling Machining in
Justify O in the i-th knife bottom1With the (i-1)-th knife bottom circle OiIntersection.
Therefore five axis insert milling top knife identification model is defined as: the (i-1)-th knife bottom circle Oi-1The plane at place is α, the (i-1)-th knife
Justify O in bottomi-1The plane at place is α, the i-th knife bottom circle OiThe plane at place is β.Two planes intersect to obtain intersection to be L1, OiIt arrives
Straight line L1Distance be d, if d < R, then it is assumed that occur top knife.
Step 2: choosing the rotation basic point of generating tool axis vector, five axis based on foundation insert milling top knife semi analytic identification model, can
To find out that inserting milling cutter bottom in the i-th that top knife situation occurs determines a rotation basic point A, around rotating basic point A to separate
After (i-1)-th time slotting milling cutter bottom direction rotates a certain angle, i-th inserts milling cutter bottom circle in (i-1)-th slotting milling cutter
The top of plane α where bottom, plane where i-th inserts milling cutter bottom and plane phase where (i-1)-th slotting milling cutter bottom
The intersection of friendship is apart from center of circle OiDistance be greater than insert milling cutter radius, then think at this time i-th adjusted insert Milling Machining not
It can occur to push up knife, as shown in Figure 2.
Step 3: to numerical control insert Milling Machining track be adjusted exclusion top knife when, rotate basic point A selection such as Fig. 3 institute
Show, bias intersection point there are two ruled surface and the circular curves of slotting milling cutter bottom, selected distance intersection is farther away in two intersection points
Intersection point, as rotation basic point A, inserts milling cutter bottom centre point and is denoted as C, the symmetric points of the upper A point of cutter bottom circle as rotation basic point
For Bi(XBi,YBi,ZBi)。
The current Parameter nodes for occurring to insert the corresponding biasing ruled surface of tool axis of milling top knife are denoted as u1, as shown in figure 4, knife
Having axis and cutter location with A point is rotation basic point, on the shrouding disc line of biasing ruled surface, with parameter point u1For starting point, with
uiCi(i=1,2,3 ..., n-1) and ui+1CiThe angle of (i=1,2,3 ..., n-1)It is rotated for rotation angle, this reality
Δ u=0.001 in mode is applied, the new slotting milling cutter bottom center of circle is obtained after rotation and is denoted as Ci+1, according to rotation basic point A and
The new slotting milling cutter bottom center of circle is denoted as Ci+1It calculates rotation basic point A and is denoted as C about the new slotting milling cutter bottom center of circlei+1It is symmetrical
Point Bi+1(i=1,2,3 ..., n-1), compares Bi+1Point Z coordinate value and Ci+1The Z coordinate value of point, if Bi+1Point Z coordinate value is greater than Ci+1
The Z coordinate value of point, then stop rotating, and the new slotting milling cutter bottom center of circle is denoted as Ci+1The as final cutter location of the parameter point,
ui+1Ci+1The straight line at place is the corresponding slotting milling cutter axis of the parameter point.If Bi+1Point Z coordinate value is less than Ci+1The Z coordinate of point
Value then continues around rotation basic point A and is rotated, until Bi+1Point Z coordinate value is greater than Ci+1It is existing to exclude top knife for the Z coordinate value of point
As.After the cutter path signal before milling top blade row removes is inserted as shown in figure 5, inserting the cutter path and processing after milling top blade row removes
Knife mark, as shown in Figure 6 and Figure 7.
This implementation embodiment inserts milling method based on " biserial fluting ", proposes that a kind of five axis insert the knowledge that knife is pushed up in milling
Other and method for removing is able to solve in slotting Milling Machining technique knife problem of potentially pushing up, the top knife region in energy automatic identification track
And top knife phenomenon is excluded by adjusting generating tool axis vector.It solves and milling roughing was inserted to impeller in the past, cutter path needs artificial adjust
Examination, inefficiency, time-consuming and laborious disadvantage.The method of the present invention is programmed into software and directly generates the cutter for not occurring to push up knife and interference
Track, 80% or more raising efficiency.
The present invention inserts Milling Machining for five axis of integral wheel, proposes that one kind is adjusted by generating tool axis vector, and then excludes to insert milling
The method for pushing up knife.This method can effectively exclude slotting milling top knife, guaranteeing that slotting Milling Machining is efficient simultaneously, do not influencing subsequent add
The efficiency of work.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (3)
1. the identification of top knife and method for removing that a kind of five axis of integral wheel inserts Milling Machining, it is characterised in that the following steps are included:
S1, top knife identification:
Milling Machining tool path data is inserted according to existing five conventional axis, establishes top knife identification model, analysis arrives workpiece in slotting milling
The bottom circle of adjacent slotting milling cutter opposite positional relationship when bottom, judges whether the adjacent cutter bottom circle for inserting milling twice occurs
Intersection thinks that top knife phenomenon occurs if intersection；
S2, rotation basic point is chosen:
To the position that there is top knife phenomenon, i-th inserts milling and top knife occurs, by inserting milling cutter generating tool axis vector and knife position to i-th
Point adjustment, i-th inserts the round extended surface for being formed by ruled surface with permutation tool axis in milling cutter bottom can be there are two intersection point, choosing
It takes apart from the farther away intersection point of intersection as rotation basic point；
S3, top blade row remove:
The parameter that i-th inserts milling cutter axis is u, is adjusted the angle as biasing surface leaf top line parameter u- Δ u, Δ u=0.001, partially
Setting the leaf top line position parameter u and i-th on ruled surface and inserting the line in the milling cutter bottom center of circle is L1, biases leaf top line on ruled surface
The position Δ u parameter u- and the angle of the line L2, L1 to L2 in the slotting milling cutter bottom center of circle of i-th areIn slotting milling cutter bottom
Milling cutter bottom is inserted to i-th in the plane where parameter point u- Δ tri- points of u with biasing ruled surface leaf top line parameter point u in the center of circle
The portion center of circle is rotated, and i-th is inserted the milling bottom center of circle around rotation basic point, and inserting milling cutter radius is R, with R be half radial direction u →
The rotation of u- Δ u direction, i.e., by AOu broken line around rotation basic point, parameter position u is rotatably moved to u- Δ u, and i-th plugs in milling cutter
The new position that tool bottom center of circle O is moved to just is the line of cutter location O1, u- Δ u and new cutter location O1 that new i-th inserts milling
The tool axis of milling is inserted as i-th；
S4, top knife detection:
Return step S1 is calculated with the presence or absence of top knife phenomenon, and if it exists, then repeat step S2 and step S3, continue through rotation
New tool axis and cutter location are obtained, until excluding to push up knife phenomenon.
2. the identification of top knife and method for removing that five axis of integral wheel according to claim 1 inserts Milling Machining, which is characterized in that
In step S1, the specific identification process of top knife identification calculates (i-1)-th slotting milling and i-th is inserted in the knife identification model of top
The intersection of plane inserts the distance of milling cutter bottom center of circle O to i-th where the circle of milling cutter bottom, if distance, which is less than, inserts milling cutter half
Diameter R, it is believed that adjacent to insert milling twice in the presence of top knife phenomenon.
3. the identification of top knife and method for removing that five axis of integral wheel according to claim 1 inserts Milling Machining, which is characterized in that
In step S2, tool axis is obtained by the ruled surface of blade profile normal bias, the leaf top line of biasing surface and blade root
Line is parameterized, and parameter value is [0,1], is corresponded to parameter point with blade root line by leaf top line and is connected acquisition tool axis.
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| CN113325800A (en) * | 2021-05-12 | 2021-08-31 | 上海电机学院 | Algorithm for correcting cutter position of variable-shaft plunge milling rough machining top cutter of ternary impeller |
| CN114160854A (en) * | 2021-12-10 | 2022-03-11 | 大连理工大学 | Impeller double-row slotting plunge milling additional working method |
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| CN106624667A (en) * | 2017-02-10 | 2017-05-10 | 大连理工大学 | Double-row grooving plunge milling method of integral impeller |
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| US4596501A (en) * | 1984-02-08 | 1986-06-24 | Pratt & Whitney Canada Inc. | Multiple cutter pass flank milling |
| KR100833112B1 (en) * | 2007-04-30 | 2008-05-28 | 전북대학교산학협력단 | Impeller making for roughing work method of generating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113325800A (en) * | 2021-05-12 | 2021-08-31 | 上海电机学院 | Algorithm for correcting cutter position of variable-shaft plunge milling rough machining top cutter of ternary impeller |
| CN114160854A (en) * | 2021-12-10 | 2022-03-11 | 大连理工大学 | Impeller double-row slotting plunge milling additional working method |
| CN114160854B (en) * | 2021-12-10 | 2022-11-15 | 大连理工大学 | Impeller double-row slotting plunge milling additional working method |
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