WO2018179401A1 - 工具経路生成方法および装置 - Google Patents
工具経路生成方法および装置 Download PDFInfo
- Publication number
- WO2018179401A1 WO2018179401A1 PCT/JP2017/013772 JP2017013772W WO2018179401A1 WO 2018179401 A1 WO2018179401 A1 WO 2018179401A1 JP 2017013772 W JP2017013772 W JP 2017013772W WO 2018179401 A1 WO2018179401 A1 WO 2018179401A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tool
- workpiece
- machining
- machining point
- posture
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4061—Avoiding collision or forbidden zones
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
- G05B19/4141—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller characterised by a controller or microprocessor per axis
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/013—Control or regulation of feed movement
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/14—Control or regulation of the orientation of the tool with respect to the work
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/21—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device
- G05B19/23—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device for point-to-point control
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/41—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path
Definitions
- the present invention relates to a tool path generation method and apparatus for performing surface machining of a workpiece with a machine tool having at least one rotary feed axis while changing the tool posture of the end mill with respect to the workpiece.
- the end mill of the present invention includes a ball end mill that processes the workpiece surface by changing the tool posture, a barrel-shaped end mill that has a barrel shape in side view, an oval form end mill that has an elliptical shape in side view, a lens-type end mill whose bottom surface has a convex curved surface, etc. This is a so-called circle segment end mill.
- the ball end mill will be described as a representative, but the present invention is also applicable to other circle segment end mills.
- Patent Document 1 describes a numerical control device that prevents deterioration of the quality of a machined surface due to such a change in tool posture.
- FIGS. 11 and 12 show a 5-axis machine tool having two rotary feed shafts on the side surface of a workpiece W having a substantially L-shaped cross section using a ball end mill, and a contour tool path TP having a pick feed amount interval. The case where it processes along is shown.
- the posture of the tool T that is, the center The direction of the vector along the axis O changes.
- a predetermined number of blocks are pre-read as correction target program commands, and the movement amount of the linear axis and the tool direction vector change amount are calculated for each block in the pre-read correction target program commands.
- the tool direction command is corrected so that the ratio is constant.
- a plurality of blocks are prefetched, that is, the ratio of the movement amount of the linear axis to the tool direction vector change amount is constant for each block along one tool path. As shown in FIGS. 11 and 12, when the tool orientation changes over a plurality of tool paths, the numerical control device of Patent Document 1 is effective. The posture of the tool cannot be corrected.
- FIG. 12 an example in which the tool and the workpiece are in contact with each other at points E, F, and G is described.
- the tool posture is vertical. Since the tool holder interferes with the upper part of the workpiece, it can be seen that the tool posture is changed.
- the direction in which the tool receives the cutting force changes, and the amount of deflection of the tool changes. Then, a slight step is generated on the processed surface of the workpiece, and the quality of the processed surface is lowered. Since the tool orientation command in the machining program is created based on the center position of the rotary feed shaft in the design of the machine tool, the machining surface is slightly affected by the center deviation of the rotary feed shaft that has an actual manufacturing error.
- a step occurs.
- the ball end mill which is a tool, issues a machining program position command based on the center of the spherical portion, assuming that the tip sphere is a true sphere. Accordingly, when the contact point is not a true sphere, the contact position with the workpiece changes, so that a slight step is generated on the workpiece processing surface. Furthermore, when the moving direction of the rotary feed shaft is reversed during the movement of the linear feed shaft, a slight step may occur on the workpiece surface due to a change in acceleration / deceleration of the rotary feed shaft or a synchronization delay. Accordingly, it is expected that the influence of these problems will be reduced if the tool posture is gradually changed in the process of machining to points E, F, and G.
- the present invention has a technical problem to solve such problems of the prior art, and when surface machining of a workpiece is performed by an end mill while changing the tool posture with respect to the workpiece, the quality of the machining surface is reduced due to a sudden change in the tool posture.
- the purpose is to prevent the decline.
- a tool path generation method when surface machining of a workpiece is performed with a machine tool having at least one rotary feed shaft while changing the tool posture of the end mill with respect to the workpiece.
- One machining point on a plurality of tool paths obtained by sequentially connecting a plurality of machining points with a straight line is set as a target machining point, and a machining point within a predetermined range centering on the target machining point
- a procedure for selecting as a point, a procedure for calculating the tool posture of the target machining point by averaging the tool posture at the selected machining point of interest, and the tool posture of the target machining point by the calculated average tool posture A procedure for correcting the data on the workpiece, a procedure for obtaining the shape data of the workpiece to be machined and the shape data of the end mill to be used, and the corrected tool posture And a procedure for performing an interference check between the workpiece and the end mill based on the data, and a procedure for generating a new tool path based on the data regarding the corrected tool posture when no interference occurs between the workpiece and the end mill.
- a tool path generation method is provided.
- a tool path generation device for generating a tool path when performing surface machining of a workpiece with a machine tool having at least one rotary feed axis while changing the tool posture of the end mill with respect to the workpiece
- One machining point on multiple tool paths obtained by sequentially connecting machining points with a straight line is set as a target machining point, and a machining point within a predetermined range centering on the target machining point is selected as a machining point of interest.
- the tool posture of the target machining point is calculated by averaging the tool posture at the selected machining point selection tool and the selected machining point of interest, and data on the tool posture of the target machining point is calculated based on the calculated average tool posture.
- the tool posture averaging unit to be corrected, the shape data of the workpiece to be machined and the shape data of the end mill to be used are obtained, and the corrected tool posture data is acquired.
- An interference avoidance processing unit that performs a collision check between the workpiece and the end mill and generates a new tool path on the basis of the data on the corrected tool posture when the workpiece and the end mill do not interfere with each other.
- a tool path generation device is provided.
- the tool posture at the target machining point is determined by averaging the tool postures at the machining points in the plurality of rows of tool paths separated by the pick feed amount. Even when the posture changes, the posture of the tool can be corrected effectively. In addition, since the interference between the workpiece and the tool is checked based on the corrected tool posture, the workpiece and the tool do not interfere with each other by correcting the tool posture. As a result, small steps due to changes in the tool posture are less likely to occur on the workpiece surface, and the quality of the machined surface is improved.
- FIG. 1 is a schematic side view of a machine tool to which a tool path generation method according to a preferred embodiment of the present invention is applied.
- FIG. 2 is a schematic block diagram showing an NC device of the machine tool of FIG. 1 incorporating a tool path generation device. It is a simplified block diagram showing a tool path generation device. It is the schematic for demonstrating a tool path
- a machine tool 10 to which a tool path generation method according to a preferred embodiment of the present invention is applied includes a bed 12 as a base installed on the floor of a factory, a front portion of the bed 12 (in FIG. 1).
- a column 16 movably provided in the horizontal front-rear direction or the Z-axis direction on the upper surface of the left side), and a column 14 erected and fixed on the upper surface of the bed 12 on the rear end side (right side in FIG.
- a Y-axis slider 18 provided as a moving body that moves in the vertical direction so as to be movable in the vertical direction or the Y-axis direction on the front surface of the column 14, and in the horizontal left-right direction or the X-axis direction on the front surface of the Y-axis slider 18 (the paper surface of FIG.
- An X-axis slider 20 provided to be movable in a direction perpendicular to the X-axis, and a spindle head 22 attached to the X-axis slider 20 and rotatably supporting the spindle 24.
- the table 16 is provided so as to reciprocate along a pair of Z-axis guide rails 26 extending in the horizontal Z-axis direction (left-right direction in FIG. 1) on the upper surface of the bed 12. Is attached with a pallet 36 for fixing a work (not shown).
- the table 16, B-axis servo motor 40 is incorporated, rotary feed the B-axis direction is supported to be able to pallet 36 about an axis O b extending in the vertical direction.
- the bed 12 is connected to a ball screw (not shown) extending in the Z-axis direction and one end of the ball screw as a Z-axis feeding device that reciprocates the table 16 along the Z-axis guide rail 26.
- a Z-axis servomotor 38 is provided, and a nut (not shown) that engages with the ball screw is attached to the table 16.
- the Y-axis slider 18 is provided so as to reciprocate along a pair of Y-axis guide rails 30 extending in the Y-axis direction (vertical direction) on the front surface of the column 14.
- the column 14 includes a ball screw (not shown) extending in the Y-axis direction as a Y-axis feeding device that reciprocates the Y-axis slider 18 along the Y-axis guide rail 30, and a pair of the ball screws.
- a Y-axis servo motor 32 connected to the upper end is provided, and a nut (not shown) that engages with the ball screw is attached to the Y-axis slider 18.
- the X-axis slider 20 is provided so as to be able to reciprocate along a pair of X-axis guide rails (not shown) extending in the X-axis direction (direction perpendicular to the paper surface in FIG. 1) on the front surface of the Y-axis slider 18. It has been.
- the Y-axis slider 18 includes a ball screw (not shown) extending in the X-axis direction as an X-axis feeding device that reciprocates the X-axis slider 20 along the X-axis guide rail,
- An X-axis servomotor 34 connected to one end is provided, and a nut (not shown) that engages with the ball screw is attached to the X-axis slider 20.
- the X-axis slider 20 has a pair of A-axis arms protruding forward in the Z-axis direction, and the spindle head 22 rotates between the A-axis arms in the A-axis direction around the tilt axis Oa parallel to the X-axis. Supported as possible.
- An A-axis servo motor 42 for rotating and feeding the spindle head 22 in the A-axis direction around the tilt axis Oa is incorporated in one of the A-axis arms.
- the spindle head 22 supports the spindle 24 so as to be rotatable around the central axis Os.
- the spindle head 22 incorporates a servo motor (not shown) that rotationally drives the spindle 24.
- the machine tool 10 is fixed to the pallet 34 and the tool T mounted on the tip of the main shaft 24 by controlling the X-axis, Y-axis, Z-axis, A-axis, and B-axis by the NC device 100, respectively.
- the workpiece mounted together with the pallet 34 is moved relative to 16 and the workpiece is machined by the tool T.
- the NC device 100 includes a tool path generation device 120 and a numerical control unit 140.
- the tool path generation device 120 smoothes the change in the tool posture of the machining program 106 generated by the CAM device 104, generates a new machining program 112, and sends it to the numerical control unit 140.
- the numerical control unit 140 includes a reading interpretation unit 142, an interpolation unit 144, and a servo control unit 146 in the same manner as a normal NC device.
- the NC device 100 drives the servo motor 150 of each axis of the machine tool 10 based on the machining program 112 generated by the tool path generation device 120.
- the servo motor 150 includes servo motors 34, 32, and 38 for the X-axis, Y-axis, and Z-axis linear feed axes, and servo motors 42 and 40 for the A-axis and B-axis rotary feed axes.
- the X-axis, Y-axis, and Z-axis servomotors 34, 32, and 38, and the A-axis and B-axis servomotors 42 and 40 are controlled independently by the NC apparatus 100.
- the tool path generation device 120 includes a reading interpretation unit 122, a tool posture smoothing processing unit 124, and an interference avoidance processing unit 132.
- the tool posture smoothing processing unit 124 includes a machining point storage unit 126, a machining point selection, and the like. Part 128 and a tool posture averaging part 130 are included.
- the machining program 106 is generated by a well-known CAD / CAM system. That is, the CAD device 102 creates CAD data corresponding to the workpiece machining shape.
- the CAM device 104 creates CAM data that is a set of minute linear commands based on the CAD data. Since this CAM data consists of an enormous amount of point cloud data, a machining program including a plurality of machining points and feed rates is obtained by thinning data from the CAM data according to a predetermined rule so that the data amount is suitable for the machining program. Created.
- the coordinate data of the machining point is described in the block format by the coordinate values of the X axis, the Y axis, the Z axis, the A axis, and the B axis. If the total number of machining points from the machining start point to the machining end point is N, each machining point is given a machining point number from 1 to N, and the machining points P (block end points) are sequentially connected in this order. As a result, a tool path which is a command value of a tool path at the time of workpiece machining is obtained.
- the reading / interpreting unit 122 reads and interprets the machining program 106 and generates data related to machining points and tool path generation.
- the machining point storage unit 126 of the tool posture smoothing processing unit 124 stores each machining point in association with a tool path including the machining point.
- 4A shows the first part of one tool path TP of the machining program 106 read and interpreted together with machining points P 1 , P 2 ,...
- the length of the distance between the processing points is determined according to the magnitude of tolerance given in advance when the CAM device 104 linearly approximates the curve along the workpiece surface to be processed.
- the tool posture may be smoothed at the position and number described in the machining program 106 output from the CAM device 104.
- a threshold value is set in advance for the distance between machining points, and if the distance between machining points exceeds this threshold value, it is divided into two, three, etc. to improve the accuracy of the tool posture smoothing process. Can do. Therefore, in FIG. 4 (b), P 1 and P 2 between and P 3 and P 4 between one split machining point P 1-1 in the P 3-1, 2 two Between P 4 and P 5
- the tool path TP ′ is shown by adding the division machining points P 4-1 and P 4-2 .
- the machining point storage unit 126 calculates the coordinate values of the X axis, the Y axis, the Z axis, the A axis, and the B axis of all machining points including the added divided machining points.
- the coordinate values of the divided machining points are calculated by complementing the coordinate values of the machining points on both ends. In the following description, the processing points and the divided processing points are not distinguished and are described as processing points.
- the processing point selection unit 128 selects one target processing point POM from the processing points stored in the processing point storage unit 126.
- a machining point included in the inspection area defined by the sphere S I having a predetermined radius r centering on the target machining point P OM is selected as the machining point of interest PI (i) .
- i 1 to N, where N is the number of machining points in the inspection area S I excluding the target machining point POM .
- the tool posture averaging unit 130 calculates a vector ⁇ 0 of the center axis O of the tool at the target machining point POM from the coordinate values of the X axis, Y axis, Z axis, A axis, and B axis. Next, the distance L (i) between the target machining point P OM and the machining point of interest P I (i) and the vector ⁇ (i) of the center axis of the tool at the machining point of interest P I (i) are all Calculation is performed on the processing point P I (i) of interest (see FIG. 7).
- the weight W (i) at the processing point P I (i) of interest is obtained using the distance L (i) between each processing point P I (i) of interest and the target processing point POM as a parameter.
- the weight W (i) can be given by, for example, a weight curve C W as shown in FIG.
- the tool posture smoothing processing unit 124 calculates a vector ⁇ ⁇ ⁇ for all the machining points, and corrects the machining program 106 based on the vector ⁇ .
- FIG. 6 shows a plurality of tool paths in the inspection region S1 and tool postures at each processing point of interest PI (i) by two-dot chain arrows.
- a tool posture smoothing processing unit is shown at the target processing point POM .
- the corrected tool posture calculated in 124 is indicated by a solid line arrow.
- the tool posture changes greatly for each tool path. However, if the tool posture is smoothed one by one with all machining points as the target machining points, the tool posture changes smoothly in the entire machining area.
- a tool posture display screen corresponding to FIG. 6 can be drawn.
- the interference avoidance processing unit 132 checks the interference between the tool and the workpiece or the stationary part of the machine tool based on the vector V that is the corrected tool posture.
- the interference avoidance processing unit 132 receives the workpiece machining shape 108 from the CAD device 102 and the tool information 110 from the CAM device 104.
- the tool information 110 includes data related to the shape of the tool holder to be used, in addition to the tool length (length along the central axis O) and the tool diameter of the tool to be used.
- the interference avoidance processing unit 132 generates a tool model shape 300 as shown in FIG. 9 based on the tool information 110.
- the model shape 300 includes a tool to be used, a tool portion 302 corresponding to the tool holder, a holder portion 304 and a spindle portion 306.
- the interference avoidance processing unit 132 is configured such that the outer shape of the model shape 320 of the tool before correction indicated by a broken line and the outer shape of the model shape 330 of the tool after correction indicated by a thin line are the model shape of the tool before correction.
- a region made up of a plurality of conical surfaces drawn around a bisector O 3 between the center axis O 1 of 300 and the corrected center axis O 2 is generated as the interference discrimination model shape 310.
- the interference avoidance processing unit 132 determines whether or not to interfere with the workpiece when the interference determination model shape 310 is moved along the tool path TP.
- the interference avoidance processing unit 132 When the interference determination model shape 310 does not interfere with the workpiece, the interference avoidance processing unit 132 outputs the machining program corrected by the tool path generation device 120 to the numerical control unit 140 as a new machining program 112. When the interference discriminating model shape 310 interferes with the workpiece, the interference avoidance processing unit 132 returns the machining program corrected by the tool path generation device 120 to the machining program before correction, and sets the numerical control unit as a new machining program 112. Output to 140.
- the reading interpretation unit 142 reads and interprets the new machining program 112 and outputs a movement command.
- This movement command includes a feed amount and a feed speed in the linear feed direction of the X axis, the Y axis, and the Z axis and the rotary feed direction of the A axis and the B axis.
- the movement command output by the reading interpretation unit 142 is sent to the interpolation unit 144.
- the interpolation unit 144 interpolates the received movement commands in the X-axis, Y-axis, and Z-axis linear feed directions and the A-axis and B-axis rotational feed directions based on the interpolation function, and the X-axis that matches the feed speed, Position commands in the Y-axis and Z-axis linear feed directions and the A-axis and B-axis rotational feed directions are output to the servo control unit 146.
- the servo controller 146 determines the X-axis, Y-axis, and Z-axis straight lines of the machine tool 10 based on the received X-axis, Y-axis, and Z-axis linear feed directions and the A-axis and B-axis rotational feed direction position commands.
- the current values for driving the servo motors of the feed axes in the feed direction and the rotation feed directions of the A axis and the B axis are set as the X-axis, Y-axis, Z-axis, A-axis, and B-axis servo motors 150 of the machine tool 10. Output to.
- the tool path generation device is incorporated in the NC device, pre-reads the machining program, performs the calculation of the tool posture smoothing process and the interference avoidance process of the present invention, and the operation of the machine tool for subsequent workpiece machining Control is executed in real time.
- the present invention is not limited to this, and the tool path generation device shown in FIG. 3 is assembled in a CAM device or incorporated in an independent personal computer, and a machining program in which tool posture smoothing processing and interference avoidance processing are performed is created in advance. A machining program may be sent to the NC device to machine the workpiece.
- NC device 102 CAD device 104 CAM device 106 Machining program 108 Machining shape 110 Tool information 112 Machining program 120 Tool path generation device 126 Machining point storage unit 128 Machining point selection unit 130 Tool posture averaging unit 132 Interference avoidance processing unit 140 Numerical control 150 Servo motor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Numerical Control (AREA)
Abstract
Description
図1を参照すると、本発明の好ましい実施の形態による工具経路生成方法を適用する工作機械10は、工場の床面に設置された基台としてのベッド12、ベッド12の前方部分(図1では左側)の上面で水平前後方向またはZ軸方向に移動可能に設けられたテーブル16、ベッド12の後端側(図1では右側)で同ベッド12の上面に立設、固定されたコラム14、上下方向へ移動する移動体としてコラム14の前面において上下方向またはY軸方向に移動可能に設けられたY軸スライダ18、Y軸スライダ18の前面で水平左右方向またはX軸方向(図1の紙面に垂直な方向)に移動可能に設けられたX軸スライダ20、該X軸スライダ20に取り付けられ主軸24を回転可能に支持する主軸頭22を具備している。
102 CAD装置
104 CAM装置
106 加工プログラム
108 加工形状
110 工具情報
112 加工プログラム
120 工具経路生成装置
126 加工点記憶部
128 加工点選択部
130 工具姿勢平均化部
132 干渉回避処理部
140 数値制御部
150 サーボモータ
Claims (7)
- エンドミルのワークに対する工具姿勢を変化させながら、少なくとも1つの回転送り軸を有する工作機械でワークの表面加工を行うときの工具経路生成方法において、
複数の加工点を順次直線で連結して得られる複数列の工具経路上の1つの加工点を対象加工点として設定し、該対象加工点を中心として所定範囲内にある加工点を関心加工点として選択する手順と、
選択された関心加工点における工具姿勢を平均することによって、対象加工点の工具姿勢を算出する手順と、
前記算出された平均工具姿勢によって、前記対象加工点の工具姿勢に関するデータを修正する手順と、
加工すべきワークの形状データおよび使用するエンドミルの形状データを取得する手順と、
前記修正した工具姿勢データに基づき、前記ワークと前記エンドミルとの干渉チェックを行う手順と、
ワークとエンドミルとの干渉が生じない場合、前記修正した工具姿勢に関するデータに基づき、新たな工具経路を生成する手順と、
を含むことを特徴とした工具経路生成方法。 - 前記複数の加工点は、各工具経路上の隣接する加工点間を分割して得られ、補間演算でその座標値を算出した分割加工点を含む請求項1に記載の工具経路生成方法。
- 前記工具姿勢を算出する手順は、対象加工点と関心加工点との間の距離に応じて重みを付けて関心加工点の工具姿勢を平均するようにした請求項1に記載の工具経路生成方法。
- 干渉チェックの結果、ワークとエンドミルとが干渉する場合、修正した工具姿勢を修正前の工具姿勢に戻すようにした請求項1に記載の工具経路生成方法。
- 干渉チェックの結果、ワークとエンドミルとが干渉する場合、修正前の工具の軸方向と修正後の工具の軸方向との中間に工具の中心軸線が一致するように、工具姿勢を修正するようにした請求項1に記載の工具経路生成方法。
- 前記干渉チェックは、修正前の工具姿勢と修正後の工具姿勢に基づいて干渉判別モデル形状を生成し、該干渉判別モデル形状とワークとが干渉するか否かを工具経路に沿って対象加工点毎に順次行うようにした請求項1に記載の工具経路生成方法。
- エンドミルのワークに対する工具姿勢を変化させながら少なくとも1つの回転送り軸を有する工作機械でワークの表面加工を行うときの工具経路を生成する工具経路生成装置において、
複数の加工点を順次直線で連結して得られる複数列の工具経路上の1つの加工点を対象加工点として設定し、該対象加工点を中心として所定範囲内にある加工点を関心加工点として選択する加工点選択部と、
選択された関心加工点における工具姿勢を平均することによって、対象加工点の工具姿勢を算出し、算出された平均工具姿勢によって、前記対象加工点の工具姿勢に関するデータを修正する工具姿勢平均化部と、
加工すべきワークの形状データおよび使用するエンドミルの形状データを取得して、前記修正した工具姿勢データに基づき、前記ワークと前記エンドミルとの干渉チェックを行い、ワークとエンドミルとの干渉が生じない場合、前記修正した工具姿勢に関するデータに基づき、新たな工具経路を生成する干渉回避処理部と、
を具備することを特徴とした工具経路生成装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020197025341A KR102202250B1 (ko) | 2017-03-31 | 2017-03-31 | 공구 경로 생성 방법 및 장치 |
EP17903013.5A EP3603883B1 (en) | 2017-03-31 | 2017-03-31 | Tool path generation method and device |
JP2019508473A JP6684962B2 (ja) | 2017-03-31 | 2017-03-31 | 工具経路生成方法および装置 |
CN201780089091.2A CN110461540B (zh) | 2017-03-31 | 2017-03-31 | 刀具路径生成方法及装置 |
PCT/JP2017/013772 WO2018179401A1 (ja) | 2017-03-31 | 2017-03-31 | 工具経路生成方法および装置 |
US16/498,720 US11262731B2 (en) | 2017-03-31 | 2017-03-31 | Tool path generation method and device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2017/013772 WO2018179401A1 (ja) | 2017-03-31 | 2017-03-31 | 工具経路生成方法および装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018179401A1 true WO2018179401A1 (ja) | 2018-10-04 |
Family
ID=63677771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/013772 WO2018179401A1 (ja) | 2017-03-31 | 2017-03-31 | 工具経路生成方法および装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US11262731B2 (ja) |
EP (1) | EP3603883B1 (ja) |
JP (1) | JP6684962B2 (ja) |
KR (1) | KR102202250B1 (ja) |
CN (1) | CN110461540B (ja) |
WO (1) | WO2018179401A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109597355A (zh) * | 2018-11-02 | 2019-04-09 | 南京航空航天大学 | 曲面微织构数控加工刀轴矢量的设计方法 |
CN111061214A (zh) * | 2019-12-18 | 2020-04-24 | 沈阳透平机械股份有限公司 | 一种判定机床限位的方法及装置 |
WO2024084706A1 (ja) * | 2022-10-21 | 2024-04-25 | ファナック株式会社 | 加工指令修正装置及び加工指令修正方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7339069B2 (ja) * | 2019-08-27 | 2023-09-05 | ファナック株式会社 | 加工プログラム生成支援装置 |
CN111930073B (zh) * | 2020-08-19 | 2024-05-28 | 上海熙锐信息科技有限公司 | 一种五轴激光刀路旋转方法、装置及存储介质 |
TWI742981B (zh) * | 2021-01-06 | 2021-10-11 | 財團法人工業技術研究院 | 加工路徑過切分析方法 |
CN113245649B (zh) * | 2021-05-28 | 2022-07-05 | 珠海格力精密模具有限公司 | 多电极高效加工方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005352876A (ja) * | 2004-06-11 | 2005-12-22 | Toyoda Mach Works Ltd | Ncデータ作成装置、5軸nc工作機械の制御装置及びclデータ作成装置 |
JP2008090734A (ja) * | 2006-10-04 | 2008-04-17 | Mitsubishi Electric Corp | 数値制御装置 |
JP2011183528A (ja) * | 2010-03-10 | 2011-09-22 | Mitsubishi Electric Corp | 自動プログラミング装置、およびその動作プログラム |
JP2015015006A (ja) | 2013-07-08 | 2015-01-22 | ファナック株式会社 | 5軸加工機を制御する数値制御装置 |
JP2016101644A (ja) * | 2014-11-28 | 2016-06-02 | ファナック株式会社 | 加工動作をロボットに教示するロボットプログラミング装置 |
JP6000496B1 (ja) * | 2015-06-11 | 2016-09-28 | 三菱電機株式会社 | 数値制御装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5033005A (en) * | 1988-09-06 | 1991-07-16 | Schlumberger Technologies, Inc. | Analytical computer-aided machining system and method |
JP2974183B2 (ja) * | 1991-11-07 | 1999-11-08 | オークマ株式会社 | 数値制御工作機械における干渉チェック装置 |
JP3116129B2 (ja) * | 1995-08-07 | 2000-12-11 | 株式会社牧野フライス製作所 | 加工方法 |
JP3593850B2 (ja) * | 1996-06-17 | 2004-11-24 | トヨタ自動車株式会社 | 工具点列発生方法 |
JP2000084794A (ja) * | 1998-09-14 | 2000-03-28 | Makino Milling Mach Co Ltd | 加工処理装置 |
JP2001075624A (ja) * | 1999-07-01 | 2001-03-23 | Mori Seiki Co Ltd | Nc工作機械のツールパスデータ生成装置及びこれを備えた数値制御装置 |
JP2007054940A (ja) * | 2005-08-26 | 2007-03-08 | Univ Of Electro-Communications | 加工装置、加工方法及び加工プログラム |
JP4905285B2 (ja) * | 2007-08-01 | 2012-03-28 | トヨタ自動車株式会社 | 工具参照面を作成する装置と方法とプログラム |
JP5494918B2 (ja) * | 2009-04-30 | 2014-05-21 | 国立大学法人名古屋大学 | ボールエンドミル加工システム、ボールエンドミル加工装置、cam装置およびボールエンドミル加工方法 |
JP2011096077A (ja) * | 2009-10-30 | 2011-05-12 | Makino Milling Mach Co Ltd | 工具経路の生成方法及び装置 |
CN101870073B (zh) * | 2010-06-11 | 2012-02-29 | 华中科技大学 | 基于工艺系统刚度特性的多轴数控加工刀具运动规划方法 |
EP2700464A4 (en) * | 2011-04-19 | 2014-12-10 | Makino Milling Machine | TOOL PROCESSING DEVICE AND HAIR RIP PROCESSING DEVICE |
EP2839925B1 (en) * | 2012-04-17 | 2020-12-02 | Makino Milling Machine Co., Ltd. | Interference determination method and interference determination device for machine tool |
WO2015114734A1 (ja) * | 2014-01-28 | 2015-08-06 | 株式会社牧野フライス製作所 | 切削加工方法および工具経路生成装置 |
JP6166300B2 (ja) * | 2015-04-13 | 2017-07-19 | ファナック株式会社 | 工具と被加工物の干渉チェックが可能な数値制御装置 |
CN105234466B (zh) * | 2015-10-28 | 2018-03-16 | 成都飞机工业(集团)有限责任公司 | 一种槽特征侧铣加工刀轨生成方法 |
CN105458372B (zh) * | 2015-12-29 | 2018-03-09 | 北京理工大学 | 一种基于非可展直纹面的侧铣误差刀位规划方法 |
JP6747916B2 (ja) * | 2016-08-31 | 2020-08-26 | ファナック株式会社 | 干渉を回避する工具退避機能を備えた数値制御装置 |
-
2017
- 2017-03-31 JP JP2019508473A patent/JP6684962B2/ja active Active
- 2017-03-31 CN CN201780089091.2A patent/CN110461540B/zh active Active
- 2017-03-31 WO PCT/JP2017/013772 patent/WO2018179401A1/ja unknown
- 2017-03-31 EP EP17903013.5A patent/EP3603883B1/en active Active
- 2017-03-31 KR KR1020197025341A patent/KR102202250B1/ko active IP Right Grant
- 2017-03-31 US US16/498,720 patent/US11262731B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005352876A (ja) * | 2004-06-11 | 2005-12-22 | Toyoda Mach Works Ltd | Ncデータ作成装置、5軸nc工作機械の制御装置及びclデータ作成装置 |
JP2008090734A (ja) * | 2006-10-04 | 2008-04-17 | Mitsubishi Electric Corp | 数値制御装置 |
JP2011183528A (ja) * | 2010-03-10 | 2011-09-22 | Mitsubishi Electric Corp | 自動プログラミング装置、およびその動作プログラム |
JP2015015006A (ja) | 2013-07-08 | 2015-01-22 | ファナック株式会社 | 5軸加工機を制御する数値制御装置 |
JP2016101644A (ja) * | 2014-11-28 | 2016-06-02 | ファナック株式会社 | 加工動作をロボットに教示するロボットプログラミング装置 |
JP6000496B1 (ja) * | 2015-06-11 | 2016-09-28 | 三菱電機株式会社 | 数値制御装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3603883A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109597355A (zh) * | 2018-11-02 | 2019-04-09 | 南京航空航天大学 | 曲面微织构数控加工刀轴矢量的设计方法 |
CN111061214A (zh) * | 2019-12-18 | 2020-04-24 | 沈阳透平机械股份有限公司 | 一种判定机床限位的方法及装置 |
CN111061214B (zh) * | 2019-12-18 | 2021-10-29 | 沈阳透平机械股份有限公司 | 一种判定机床限位的方法及装置 |
WO2024084706A1 (ja) * | 2022-10-21 | 2024-04-25 | ファナック株式会社 | 加工指令修正装置及び加工指令修正方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20190112773A (ko) | 2019-10-07 |
CN110461540B (zh) | 2020-12-15 |
US11262731B2 (en) | 2022-03-01 |
CN110461540A (zh) | 2019-11-15 |
EP3603883A1 (en) | 2020-02-05 |
JP6684962B2 (ja) | 2020-04-22 |
JPWO2018179401A1 (ja) | 2019-11-07 |
EP3603883A4 (en) | 2020-11-25 |
EP3603883B1 (en) | 2023-04-26 |
KR102202250B1 (ko) | 2021-01-12 |
US20210109502A1 (en) | 2021-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2018179401A1 (ja) | 工具経路生成方法および装置 | |
KR101928419B1 (ko) | 공구경로의 생성방법 및 공작기계 | |
CN102736559B (zh) | 机床的校正值运算方法以及机床的控制装置 | |
JP5417391B2 (ja) | 数値制御装置 | |
US7070368B2 (en) | Method for setting a machining feed rate and a machine tool using the same | |
JP5219974B2 (ja) | 加工制御装置、レーザ加工装置およびレーザ加工システム | |
US20100228384A1 (en) | Method and device for generating transformed control data for controlling a tool on a machine tool | |
JP6076507B2 (ja) | 加工方法および工作機械の制御装置 | |
JP5881850B2 (ja) | 工作機械の制御装置および工作機械 | |
JP6563133B2 (ja) | 加工プログラム生成装置及び加工方法 | |
WO2014057562A1 (ja) | 工具経路生成方法、工作機械の制御装置および工具経路生成装置 | |
JP5355693B2 (ja) | 誤差補正方法及び工作機械 | |
JP5195181B2 (ja) | 工作機械のncデータ作成装置 | |
JPH11277469A (ja) | パラレルリンク機構の制御方法及び制御装置 | |
US20200319618A1 (en) | Evaluation work piece, non-transitory computer readable medium recording a machining program and non-transitory computer readable medium recording a data structure | |
JP7286860B1 (ja) | 加工プログラムの補正方法および情報処理プログラム | |
JP7274649B1 (ja) | 情報処理装置および情報処理プログラム | |
JP6980357B1 (ja) | 情報処理装置および情報処理プログラム | |
WO2022185640A1 (ja) | プログラム、clデータ編集装置及び工作機械 | |
WO2023073782A1 (ja) | 数値制御装置 | |
JP5645884B2 (ja) | 機械加工方法及び装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17903013 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2019508473 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20197025341 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2017903013 Country of ref document: EP Effective date: 20191031 |