WO2014002228A1 - 工作機械の制御装置および工作機械 - Google Patents
工作機械の制御装置および工作機械 Download PDFInfo
- Publication number
- WO2014002228A1 WO2014002228A1 PCT/JP2012/066570 JP2012066570W WO2014002228A1 WO 2014002228 A1 WO2014002228 A1 WO 2014002228A1 JP 2012066570 W JP2012066570 W JP 2012066570W WO 2014002228 A1 WO2014002228 A1 WO 2014002228A1
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- Prior art keywords
- tool
- axis
- rotary tool
- workpiece
- rotary
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/28—Grooving workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2220/00—Details of milling processes
- B23C2220/52—Orbital drilling, i.e. use of a milling cutter moved in a spiral path to produce a hole
Definitions
- the present invention relates to a machine tool control device and a machine tool.
- a machine tool that performs a process such as cutting a workpiece by rotating a rotary tool.
- a numerically controlled machine tool in which a tool path of a rotary tool is designated by coordinates of a predetermined axis and the like is performed while the rotary tool is automatically moved.
- Patent Document 1 JP-A-60-141446 discloses a rotary tool holder that performs cutting while revolving a rotating tool around the rotation center of a main shaft. It is disclosed that this rotary tool holder rotates by rotating the tool with a planetary gear mechanism and revolves around the center of rotation of the main shaft. By using this rotary tool holder, it is disclosed that an accurate width dimension can be obtained by adjusting the amount of eccentricity even if the rotary tool such as a cutter is worn and the diameter of the rotary tool changes.
- Patent Document 2 discloses a CNC system including a numerical controller (CNC) and a programmable machine controller (PMC).
- This numerical control device stores a machining program in advance.
- the movement command means on the CNC side decodes the machining program, and issues an axis movement command on the CNC side according to the contents.
- a sequence program is stored in the programmable machine controller.
- the PMC side movement command means sends a PMC side axis movement command included in the sequence program to the CNC side. It is disclosed that the CNC system controls the movement of each axis by superimposing the axis movement command on the CNC side and the axis movement command on the PMC side.
- the movement command means on the PMC side outputs a command to reciprocate a predetermined section on the Z axis
- the movement command means on the CNC side outputs a command to make a monotonous linear movement parallel to the X axis. It is disclosed.
- a groove having a width larger than the diameter of the rotary tool can be formed.
- a groove having a large width can be processed.
- a hole having a diameter larger than the diameter of the rotary tool can be formed.
- the rotary tool holder disclosed in Patent Literature 1 processes a workpiece by moving along the workpiece shape. That is, processing is performed by the rotary tool holder moving once along a desired shape.
- the width that can be generated by the rotary tool holder is substantially one, if the width or the like of the groove to be generated changes, the rotary tool holder having the planetary gear mechanism must be replaced. is there.
- the rotary tool holder having the planetary gear mechanism must be replaced. is there.
- the special tool formed according to the shape of the part to process had to be used.
- the machine tool control apparatus is a machine tool control apparatus that rotates a rotating tool and advances the rotating tool while performing a revolving motion that causes the rotary tool to perform a circular motion relative to the workpiece.
- a reading / interpretation unit that reads a machining program in which the input information of the progress of the rotating tool traveling along the workpiece shape and the input information of the revolving motion of the rotating tool are individually input, and the progress of the rotating tool
- the first tool path along which the rotary tool set based on the input information travels and the second tool path of the revolving motion of the rotary tool set based on the input information on the revolving motion of the rotary tool are combined to form the rotary tool.
- Includes a calculation unit that sets a third tool path that travels along the machining shape while performing a revolving motion.
- the first tool path is set so that the rotary tool advances along the machining shape of the workpiece after performing a revolving motion of a predetermined rotation angle.
- the machine tool of the present invention is a machine tool that processes a workpiece by moving the rotary tool and the workpiece relative to each other, and inputs the input information of the progress of the rotary tool that advances along the machining shape of the workpiece and the revolution motion of the rotary tool.
- a reading / interpreting unit that reads a machining program in which information is individually input, a first tool path through which a rotating tool set based on the input information of the progress of the rotating tool, and input information of the revolving motion of the rotating tool
- the second tool path of the revolving motion of the rotating tool set in the above is synthesized, and the arithmetic unit for setting the third tool path that advances along the machining shape while the revolving tool performs the revolving motion, and is synthesized by the computing unit
- a moving device that relatively moves the rotary tool and the workpiece based on the third tool path.
- a groove or a hole larger than the diameter of the rotary tool to be used can be processed without using a rotary tool holder formed in accordance with the shape of the part to be processed.
- FIGS. 1 to 9 a description will be given of a machine tool control device and a numerically controlled machine tool in an actual configuration.
- a horizontal machining center having a main shaft extending in the horizontal direction will be described as an example.
- FIG. 1 is a schematic diagram of a numerically controlled machine tool according to the present embodiment.
- the numerically controlled machine tool 10 includes a bed 12 installed on a floor surface of a factory or the like.
- a Z-axis guide rail 28 is fixed to the upper surface of the bed 12.
- the Z axis in the present embodiment is the horizontal direction.
- the Z-axis guide rail 28 is disposed so as to extend in the Z-axis direction (left-right direction in FIG. 1).
- the numerically controlled machine tool 10 in the present embodiment includes a moving device that relatively moves the rotary tool 22 and the workpiece 1.
- a table 14 is disposed on the upper surface of the Z-axis guide rail 28.
- the table 14 is slidably disposed with respect to the Z-axis guide rail 28.
- the table 14 moves along the Z axis.
- a numerically controlled rotary table 42 for rotating the workpiece 1 in the B-axis direction is disposed on the upper surface of the table 14.
- the workpiece 1 is fixed to the upper surface of the rotary table 42 via a workpiece holding member 40.
- the numerically controlled machine tool in the present embodiment includes a device that rotates the workpiece 1 in the B-axis direction. However, when the rotational movement in the B-axis direction is unnecessary, the rotary table 42 is not interposed, and the table 14 The work 1 may be fixed on the upper surface.
- the X-axis guide rail 36 is fixed on the upper surface of the bed 12.
- the X axis is orthogonal to the Z axis and further extends in the horizontal direction (perpendicular to the plane of FIG. 1).
- the X-axis guide rail 36 is formed so as to extend along the X-axis.
- the column 16 is slidably disposed on the X-axis guide rail 36. The column 16 moves along the X axis.
- a Y-axis guide rail 34 is fixed to the front surface facing the workpiece 1.
- the Y axis in the present embodiment extends in a direction orthogonal to the X axis and the Z axis.
- the Y axis guide rail 34 extends along the Y axis.
- a spindle head 18 is disposed on the Y-axis guide rail 34.
- the spindle head 18 is slidably formed on the Y-axis guide rail 34.
- the spindle head 18 moves along the Y axis.
- the spindle head 18 is formed to rotatably support the spindle 20.
- the moving device of the present embodiment includes a Z-axis moving device that moves the rotary tool 22 relative to the workpiece 1 in the Z-axis direction.
- a Z-axis feed screw 24 is disposed below the table 14 inside the bed 12.
- the Z-axis feed screw 24 extends in the Z-axis direction.
- a nut 26 is fixed to the lower surface of the table 14.
- the nut 26 is screwed onto the Z-axis feed screw 24.
- a Z-axis servomotor 25 is connected to one end of the Z-axis feed screw 24.
- the table 14 moves along the Z-axis guide rail 28 as the nut 26 moves. As a result, the workpiece 1 moves in the Z-axis direction.
- the numerically controlled machine tool of the present embodiment includes an X-axis moving device that moves the rotary tool 22 relative to the workpiece 1 in the X-axis direction. Similar to the Z-axis moving device, the X-axis moving device includes an X-axis feed screw disposed below the column 16 inside the bed 12. The X-axis feed screw is formed to extend in the X-axis direction. A nut 37 that is screwed into the X-axis feed screw is fixed to the lower surface of the column 16. An X-axis servo motor 38 is connected to one end of the X-axis feed screw. By driving the X-axis servomotor 38 and rotating the X-axis feed screw, the nut 37 moves in the X-axis direction. The column 16 moves along the X-axis guide rail 36 as the nut 37 moves. As a result, the rotary tool 22 moves in the X-axis direction.
- the numerically controlled machine tool of the present embodiment includes a Y-axis moving device that moves the rotary tool 22 relative to the workpiece 1 in the Y-axis direction.
- a Y-axis feed screw 32 is disposed inside the column 16. The Y-axis feed screw 32 is formed to extend in the Y-axis direction.
- a nut 30 that is screwed into the Y-axis feed screw 32 is fixed to the back surface of the spindle head 18.
- a Y-axis servomotor 31 is connected to the upper end of the Y-axis feed screw 32. By driving the Y-axis servo motor 31 and rotating the Y-axis feed screw 32, the nut 30 moves in the Y-axis direction.
- the spindle head 18 moves along the Y-axis guide rail 34 as the nut 30 moves.
- the rotary tool 22 moves in the Y axis direction.
- the numerically controlled machine tool of the present embodiment includes a B-axis moving device that moves the rotary tool 22 relative to the workpiece 1 in the B-axis direction.
- the rotary table 42 includes a B-axis servo motor 43 for rotating the workpiece 1. When the B-axis servo motor 43 is driven, the workpiece 1 rotates in the B-axis direction.
- Rotating tool 22 is arranged at the tip of spindle 20.
- an end mill is attached as the rotary tool 22.
- a motor 23 for rotating the rotary tool 22 is connected to the main shaft 20. When the motor 23 is driven, the rotary tool 22 rotates with the central axis of the main shaft as the rotation axis.
- the numerically controlled machine tool in the present embodiment is fixed to the table 14 by operating the column 16, the spindle head 18, and the table 14 in the X-axis, Y-axis, and Z-axis directions while rotating the rotary tool 22, respectively.
- the workpiece 1 is cut into a desired shape.
- the numerically controlled machine tool 10 functions as a three-axis numerically controlled machine tool. Further, when the rotary table 42 is driven, the work 1 is rotated around the B axis. In this case, the numerically controlled machine tool 10 functions as a 4-axis numerically controlled machine tool having a B axis.
- the numerically controlled machine tool 10 in the present embodiment sets a tool path along which the rotary tool 22 moves relative to the workpiece 1 in order to cut the workpiece 1 into a desired shape.
- the numerically controlled machine tool 10 in the present embodiment includes a control device 60 for generating a tool path of the rotary tool 22.
- the tool path in the present embodiment is the path of the tool center point at the tip of the rotary tool 22.
- the tool center point in the present invention is the position of the tip of the rotary tool on the rotation axis when the rotary tool rotates.
- FIG. 2 shows a schematic diagram of the numerically controlled machine tool 10 according to the present embodiment.
- Control device 60 in the present embodiment includes an arithmetic processing device.
- the arithmetic processing device includes a microprocessor (CPU) that performs arithmetic processing and the like, a ROM (Read Only Memory) and a RAM (Random Access Memory) as a storage device, and other peripheral circuits.
- CPU microprocessor
- ROM Read Only Memory
- RAM Random Access Memory
- the control device 60 calculates the relative position of the rotary tool 22 with respect to the workpiece 1 based on the machining program 51 created by the user.
- the control device 60 in the present embodiment sets the relative position of the rotary tool 22 with respect to the workpiece 1 based on the four axes of the X axis, the Y axis, the Z axis, and the B axis.
- the control device 60 sets a movement control amount for each of the X axis, the Y axis, the Z axis, and the B axis.
- the X-axis servo motor 38, the Y-axis servo motor 31, the Z-axis servo motor 25, and the B-axis servo motor 43 are driven.
- the servo motor is driven, the workpiece 1 and the rotary tool 22 are relatively moved to a desired position.
- control device 60 in the present embodiment, information on a plurality of tool paths is input to the machining program 51.
- the user inputs two types of tool paths different from each other to the machining program 51.
- the control device 60 includes a reading interpretation unit 52 that reads the machining program 51. Based on the tool path of the machining program 51, the reading / interpreting unit 52 outputs a machining command to the system control unit.
- the reading interpretation unit 52 in the present embodiment outputs two different machining commands based on two different tool paths.
- the system control unit in the present embodiment includes a first system control unit 53 and a second system control unit 54. That is, a plurality of system control units are included.
- the control device 60 in the present embodiment is configured to output two different machining commands to the first system control unit 53 and the second system control unit 54.
- the reading and interpreting unit 52 distributes the machining command to the first system control unit 53 or the second system control unit 54.
- the first system control unit and the second system control unit control the first system of each of the X axis, the Y axis, the Z axis, and the B axis using a program stored in advance based on the received machining command.
- the amount and the control amount of the second system are set. That is, the first system tool path and the second system tool path of the rotary tool 22 are set.
- the control device 60 in the present embodiment includes a calculation unit 55 that synthesizes control amounts for each axis generated by a plurality of system control units.
- the control amount set by the first system control unit 53 and the control amount set by the second system control unit 54 are input to the calculation unit 55.
- the control amount of the first system and the control amount of the second system are combined for each axis.
- the calculation unit 55 outputs a position command value, a speed command value, and the like of each axis such as the X axis to the motor control unit 56 based on the combined control amount, that is, the combined tool path.
- the motor control unit 56 Based on the output of the calculation unit 55, the motor control unit 56 sends current commands to the X-axis servo motor 38, the Y-axis servo motor 31, the Z-axis servo motor 25, and the B-axis servo motor 43 that drive the respective axes. Send values etc. Each servo motor is driven, and the relative position of the rotary tool 22 with respect to the workpiece 1 is adjusted. Note that the motor control unit 56 in the present embodiment also controls the motor 23 for rotating the rotary tool 22.
- the reading interpretation unit is separated from the system control unit, but the present invention is not limited to this configuration, and the system control unit may include the reading interpretation unit.
- the first system control unit may include a reading / interpretation unit, and the first system control unit may read the machining program, and then send a machining command for only the second system to the second system control unit.
- FIG. 3 shows a schematic perspective view of the first workpiece in the present embodiment.
- FIG. 3 is a diagram of a workpiece when machining is completed by the numerically controlled machine tool according to the present embodiment.
- a groove 66 is formed on one surface of the workpiece 1.
- the groove part 66 is formed by performing the process which cuts the workpiece
- FIG. The groove part 66 includes a linear part and a curved part.
- the width of the groove 66 is formed to be larger than the diameter of the rotary tool 22.
- the depth of the groove 66 is formed to be constant.
- the X-axis position and the Y-axis position are changed along the surface of the work 1 without changing the depth (Z-axis position) of the rotary tool 22 at the time of cutting. Control to change the position.
- the rotation control in the B-axis direction on the rotary table 42 is stopped.
- the workpiece 1 is fixed to the rotary table 42 so that the machining surface of the workpiece 1 faces the rotary tool 22.
- work 1 may become in parallel with an X-axis and a Y-axis.
- the workpiece 1 is moved to a desired Z-axis position, and the Z-axis position is controlled invariably until the cutting is completed.
- the groove 66 can be processed by a planar movement in the X-axis direction and the Y-axis direction. In the following description, control for keeping the position in the Z-axis direction constant will be omitted, and control for moving in the X-axis direction and the Y-axis direction will be described.
- FIG. 4 shows a schematic plan view when the groove 66 is formed in the first workpiece 1 in the present embodiment.
- FIG. 4 is a view when a linear portion of the groove 66 is formed.
- the rotary tool 22 rotates around an axis passing through the tool center point of the rotary tool 22 as indicated by an arrow 91. That is, the rotary tool 22 rotates with the tool center point as the rotation center 72.
- the width of the groove 66 indicated by the arrow 95 is larger than the diameter of the rotary tool 22.
- control is performed to further circularly rotate the rotating tool 22 that is rotating. That is, control for revolving the rotary tool 22 is performed.
- the revolving motion of the rotary tool 22 is performed.
- the revolution center 73 can set the center point of the width direction of the groove part 66, for example.
- the revolution center 73 is advanced along the direction in which the groove 66 extends. Advancing the revolution center 73 along the center line in the width direction of the groove 66 makes it possible to form the groove 66 having a desired shape.
- FIG. 5 shows a schematic diagram of the tool path of the rotary tool 22 in the present embodiment.
- FIG. 5 is a locus of the rotation center 72 of the rotary tool 22.
- An arrow 93 indicates the direction in which the groove 66 extends.
- FIG. 5 illustrates the case where the extending shape of the groove is a straight line.
- the traveling path indicated by the arrow 93 is a curved line.
- control device 60 in the present embodiment input information on the progress of rotary tool 22 when rotary tool 22 advances along the machining shape of workpiece 1, and Revolution motion input information is input to the machining program 51.
- input information on the progress of the rotary tool 22 that advances along the direction in which the groove 66 extends as indicated by an arrow 93 and input information on the revolution movement of the rotary tool 22 as indicated by an arrow 92 are provided. Enter individually.
- the reading interpretation unit 52 outputs a tool path machining command along the extending direction of the groove 66 to the first system control unit 53 and outputs a tool path machining command for the revolving motion to the second system control unit 54.
- first system control unit 53 in the present embodiment, a first tool path in which rotating tool 22 advances along the shape of groove 66 is set as indicated by arrow 93. That is, the first system control unit 53 sets the control amount of the first system of each axis for the revolving rotary tool 22 to move in the direction in which the groove 66 extends.
- second system control unit 54 as indicated by an arrow 92, a second tool path along which the rotation center 72 revolves is set. That is, in the second system control unit 54, the control amount of the second system of each axis for revolving the rotary tool 22 is set.
- the control amount of the first system of each axis from the first system control unit 53 and the control amount of the second system of each axis from the second system control unit 54 are combined in the calculation unit 55. As a result, a superimposed third tool path as shown in FIG. 5 is generated.
- the first system control unit 53 and the second system control unit 54 perform control of combining after calculating the independent control amount.
- the coordinates in the first system control unit 53 and the coordinates in the second system control unit 54 are individually set.
- FIG. 6 is a schematic diagram illustrating coordinates in the first system control unit 53 and coordinates in the second system control unit 54 of the present embodiment.
- the rotary tool 22 rotates in the C-axis direction.
- the actual axes of the X axis, the Y axis, the Z axis, and the B axis can be set.
- an XX axis as a virtual axis corresponding to the X axis, a YY axis as a virtual axis corresponding to the Y axis, and a ZZ axis as a virtual axis corresponding to the Z axis are set. be able to.
- the BB axis can be set as a virtual axis corresponding to the B axis.
- Each virtual axis is parallel to the actual axis.
- the XX axis is parallel to the X axis.
- the virtual axis of the second system control unit 54 is a virtual axis when the rotary tool 22 does not move in the first system control unit 53.
- the virtual axis corresponds to the axis when it is assumed that the revolution center 73 is stopped.
- FIG. 7 shows a schematic diagram of a machining program for the numerically controlled machine tool according to the present embodiment.
- FIG. 8 shows a schematic diagram of a machine tool control apparatus according to the present embodiment.
- the machining program 51 is created by the user.
- the machining program 51 is input according to the machining shape desired by the user.
- the user inputs a G code.
- the description method of these codes is determined in advance.
- a code G1001 for commanding a revolving motion is described.
- a code G01 or the like is described as a command for a groove path for the rotary tool 22 to move along the machining shape while performing a revolving motion.
- the first tool path along which the rotary tool 22 moves along the machining shape of the workpiece 1 and the second tool path along which the rotary tool 22 revolves are set independently of each other.
- symbol G1000 for ending revolution motion is described.
- the code G1001 that is a command of the revolving motion can be set as shown in the following Table 1, for example.
- Arguments A, B, C, and D for the code G1001 can be set by the user.
- the argument A is the rotation direction of the revolution movement. For example, when the rotation direction of the revolution is clockwise, the argument is set to 02.
- the argument B is the width of the groove 66 and can be set to a value larger than the diameter of the rotary tool.
- the argument C is the feed rate of the revolving motion. Referring to FIG. 4, the feed speed of the revolution movement is a tangential speed when the rotation center 72 indicated by the arrow 92 rotates.
- the argument D is a tool offset number.
- the tool offset number is a parameter number in which the radius of the rotary tool is stored.
- the tool offset is from the tool center point to the actual machining position.
- the tool offset corresponds to the radius of the tool. That is, by setting the argument D, the radius of the rotary tool can be specified.
- the code G1001 of the revolution motion command is read by the reading interpretation unit 52.
- the reading / interpreting unit 52 determines that the code G1001 is a command for the revolution motion.
- the second system control unit 54 sets the control amount for the rotary tool 22 to perform the revolving motion.
- the reading / interpretation unit 52 delivers a revolution motion command to the second system control unit 54.
- a program for executing a command of the reading interpretation unit 52 is stored in advance.
- a code for controlling the machine tool is set based on the code G1001.
- Table 2 shows an explanatory diagram of codes described in the program of the second system control unit 54 when the command of the code G1001 is received.
- a code for controlling the machine tool is determined based on the argument of the code G1001.
- the code G # 1 and the like here are stored in advance as a subprogram in the second system control unit.
- the variable # 1 of the code G # 1 of the program of the second system control unit indicates the rotation direction of the revolution movement.
- the argument A of the machining program code G1001 is cited.
- the variable is 02 and it is determined that the code is G02. It is predetermined that the code G02 is clockwise circular interpolation.
- variable # 2 of code I # 2 sets the distance from the starting point of the arc to the center of the arc. That is, the radius of the revolving motion is set.
- the radius of the revolution motion can be calculated by the following expression (1) based on the code G1001 input to the machining program 51.
- the feed speed is set in variable # 3 of code F # 3.
- the feed rate of the revolving motion can refer to the argument C of the code G1001 of the machining program 51.
- a program used in the second system control unit is set based on the code of the machining program 51 input by the user.
- the second system control unit sets the control amount in each axial direction based on the set code and the like.
- control for moving the rotary tool in the X axis direction and the Y axis direction is performed.
- the control amount of the XX axis of the virtual axis and the control amount of the YY axis of the virtual axis are set. That is, the second tool path for performing the revolving motion is set.
- the output of the second system control unit 54 is input to the calculation unit 55.
- the control amount of the rotary tool that advances along the groove shape is set.
- the reading interpretation unit 52 reads the code G01 that sets the groove path.
- the reading interpretation unit 52 determines that the command is a groove path.
- the reading interpretation unit 52 outputs a processing command to the first system control unit 53.
- control amounts for the X axis and Y axis, which are actual axes are set based on the code G01. That is, a first tool path that travels along the groove shape is set.
- the first system controller stores that the code G01 is a control that moves linearly.
- the first system control unit sets the control amount for each axis.
- the X-axis control amount and the Y-axis control amount are output to the calculation unit 55.
- the output of the first system control unit and the output of the second system control unit are combined.
- the control amount for each axis is synthesized. For example, in the X-axis direction, the X-axis control amount output from the first system control unit 53 and the XX-axis control amount output from the second system control unit are added to obtain the final X-axis. Sets the control amount at. Also, the control amount for the Y axis and the control amount for the YY axis are added to set the final control amount for the Y axis. Thus, the finally synthesized third tool path is set.
- the motor control unit 56 controls the servo motor of each axis based on the control amount for each axis calculated by the calculation unit 55. That is, the moving device performs relative movement between the rotary tool and the workpiece based on the third tool path synthesized by the calculation unit.
- the control device for the machine tool of the present embodiment includes the first system control unit that sets the first tool path along which the rotary tool advances along the workpiece machining shape, and the second tool for revolving the rotary tool.
- a second system control unit that sets a route, and combines the output of the first system control unit and the output of the second system control unit.
- Each system control unit outputs a control amount for each moving axis equivalent to each tool path.
- the calculation unit can synthesize the control amount for each moving axis, and set the third tool path when the rotary tool advances along the machining shape while revolving.
- the control device generates a tool path for accurately processing a groove portion and a hole portion having a width equal to or larger than the diameter of the rotary tool without using a special tool having a planetary rotation mechanism or the like. be able to. Further, the numerically controlled machine tool can perform machining accurately without using such a special tool. Further, although it is difficult to increase the cutting amount with a tool having a planetary rotation mechanism or the like, the numerically controlled machine tool in the present embodiment can increase the cutting amount and shorten the machining time.
- the groove width, the hole diameter, etc. can be changed by changing the machining program without replacing the head part of the rotary tool. That is, the groove width and the hole diameter can be easily changed without changing the rotary tool. Furthermore, even when the radius of the rotary tool changes due to wear of the rotary tool, the groove width can be easily adjusted. For example, by adjusting the input of the machining program, it is possible to make a fine adjustment to the wear of the rotary tool.
- control device since the control device according to the present embodiment can independently input the tool path of the revolving motion and the tool path of the groove path in the input program, the input program can be easily generated.
- the first system control unit 53 in the present embodiment performs a revolving motion of a predetermined rotation angle when starting the machining of the workpiece 1, and then rotates the rotary tool 22 along the machining shape of the workpiece 1.
- the first tool path is set to advance.
- the control amount set by the first system control unit 53 can be set to zero until the revolution of the rotary tool performed by the second system control unit 54 is rotated once.
- the rotation angle for performing the revolving motion is not limited to one rotation and can be set as necessary. For example, when the uncut portion can be suppressed by the revolving motion of half rotation, it can be set to half rotation. Further, as the rotation angle for performing the revolution motion in advance, in addition to inputting the angle around the revolution center, the rotation angle for performing the revolution motion may be set in advance by inputting the time for performing the revolution. A code or the like for performing a revolving motion at a predetermined rotation angle can be set in advance in a subprogram stored in the first system control unit 53 or the second system control unit 54. Alternatively, a command for performing a revolving motion at a predetermined rotation angle may be input to a machining program created by the user, and control may be performed based on the command of the machining program.
- FIG. 9 shows a schematic plan view of the second workpiece 1 in the present embodiment.
- a groove 66 extending in a spiral shape is formed on the surface of the columnar workpiece 1.
- a cylindrical cam, a globoidal cam or the like can be manufactured.
- the workpiece 1 when forming the groove 66 of the second workpiece 1, the workpiece 1 is fixed to the rotary table 42 so that the central axis 2 of the workpiece 1 is parallel to the Y axis. Further, the workpiece 1 is fixed so that the center axis 2 coincides with the rotation axis of the rotary table 42.
- the workpiece In processing the second workpiece 1, in addition to movement in the X-axis direction and the Y-axis direction, the workpiece is rotated in the B-axis direction. The X axis and the Y axis are moved relative to each other while rotating with the center axis 2 of the work 1 as the rotation axis.
- the first tool path 53 can set the first tool path along the machining shape indicated by the arrow 96 in the revolution center 73. That is, the tool path in the X axis, Y axis, and B axis is set.
- the second system control unit 54 can set a second tool path in which the rotary tool 22 performs a revolving motion with respect to the revolution center 73. That is, the tool path on the XX axis, the YY axis, and the BB axis is set.
- the calculation unit 55 can synthesize the output from the first system control unit 53 and the output from the second system control unit 54 to set the third tool path.
- the groove 66 is formed by rotating the workpiece 1 in the B-axis direction as indicated by an arrow 98 while moving the rotating tool 22 performing the revolving motion in the Y-axis direction indicated by the arrow 97. can do.
- the control device and the numerically controlled machine tool according to the present embodiment can be applied not only to planar processing but also to three-dimensional processing.
- the moving device for moving the rotary tool 22 and the workpiece 1 relative to each other in the present embodiment moves the rotary tool 22 relative to the workpiece 1 in the X axis and Y, and rotates in the Z axis and B axis.
- the movement apparatus should just be formed so that at least one of a workpiece
- the processing for forming the groove portion for each workpiece has been described as an example, but the present invention is not limited to this configuration and can be applied to any processing.
- the present invention can be applied to cutting for forming a concave portion on the surface of a workpiece, cutting of an end surface of the workpiece, and the like.
- the processing of the workpiece is not limited to cutting, and the present invention can be applied to arbitrary processing.
- a so-called horizontal machining sensor has been described as an example.
- the present invention is not limited to this embodiment, and the present invention can be applied to any numerically controlled machine tool.
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Abstract
Description
ここで、溝幅は、加工プログラム51のコードG1001の引数Bを引用することができる。回転工具の直径は、コードG1001の引数Dの工具オフセット番号により定まる回転工具の半径により算出することができる。
10 数値制御工作機械
14 テーブル
16 コラム
20 主軸
22 回転工具
25 Z軸サーボモータ
31 Y軸サーボモータ
38 X軸サーボモータ
43 B軸サーボモータ
51 加工プログラム
52 読取解釈部
53 第1系統制御部
54 第2系統制御部
55 演算部
60 制御装置
66 溝部
72 自転中心
73 公転中心
Claims (3)
- 回転工具を自転させ、自転している前記回転工具をワークに対して相対的に円運動させる公転運動を行いながら進行させてワークを加工する工作機械の制御装置であって、
前記ワークの加工形状に沿って進行する前記回転工具の進行の入力情報と、前記回転工具の公転運動の入力情報とを個別に入力した加工プログラムを読み取る読取解釈部と、
前記回転工具の進行の入力情報に基づいて設定された前記回転工具が進行する第1工具経路と、前記回転工具の公転運動の入力情報に基づいて設定された前記回転工具の公転運動の第2工具経路とを合成し、前記回転工具が公転運動を行いながら加工形状に沿って進行する第3工具経路を設定する演算部とを備えることを特徴とした、工作機械の制御装置。 - 前記第1工具経路は、予め定められた回転角度の公転運動を行った後に、前記ワークの加工形状に沿って前記回転工具を進行するように設定する、請求項1に記載の工作機械の制御装置。
- 回転工具とワークとを相対移動させてワークを加工する工作機械において、
前記ワークの加工形状に沿って進行する前記回転工具の進行の入力情報と、前記回転工具の公転運動の入力情報とを個別に入力した加工プログラムを読み取る読取解釈部と、
前記回転工具の進行の入力情報に基づいて設定された前記回転工具が進行する第1工具経路と、前記回転工具の公転運動の入力情報に基づいて設定された前記回転工具の公転運動の第2工具経路とを合成し、前記回転工具が公転運動を行いながら加工形状に沿って進行する第3工具経路を設定する演算部と、
前記演算部にて合成した前記第3工具経路に基づいて、前記回転工具と前記ワークとを相対移動させる移動装置とを備えることを特徴とした、工作機械。
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EP12880039.8A EP2868411B1 (en) | 2012-06-28 | 2012-06-28 | Control device for machine tool and machine tool |
JP2014522306A JPWO2014002228A1 (ja) | 2012-06-28 | 2012-06-28 | 工作機械の制御装置および工作機械 |
US14/410,008 US9886021B2 (en) | 2012-06-28 | 2012-06-28 | Control device for coordinating translation and revolution movement in a machine tool |
PCT/JP2012/066570 WO2014002228A1 (ja) | 2012-06-28 | 2012-06-28 | 工作機械の制御装置および工作機械 |
CN201280074310.7A CN104428088B (zh) | 2012-06-28 | 2012-06-28 | 机床的控制装置以及机床 |
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ES2748853T3 (es) * | 2013-04-11 | 2020-03-18 | Citizen Watch Co Ltd | Dispositivo de configuración del número de compensación |
CN104923842B (zh) * | 2015-06-26 | 2017-02-01 | 张家港玉成精机股份有限公司 | 一种圆盘机上用于加工带凹槽工件的加工装置 |
JP6267161B2 (ja) * | 2015-08-10 | 2018-01-24 | ファナック株式会社 | 平行する2軸の軸制御を行う数値制御装置 |
EP3479936A1 (de) * | 2017-11-03 | 2019-05-08 | Siemens Aktiengesellschaft | Drehen von werkstücken auf einer werkzeugmaschine |
US10843278B2 (en) * | 2017-11-17 | 2020-11-24 | Lamons Gasket Company | Kammprofile milling machine |
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US20150323923A1 (en) | 2015-11-12 |
CN104428088A (zh) | 2015-03-18 |
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