Milling machine, milling method

Abstract

This reduces setup time while maintaining the accuracy of chamfering. [Solution] The device comprises a table on which a workpiece having a roughly rectangular contour when viewed from above is placed, a machining section capable of top surface milling, a measuring probe attached to the machining section, a milling jig, a chamfering jig for deburring or chamfering, a stock section that can switch between the measuring probe, the milling jig and the chamfering jig, and a control unit that attaches the measuring probe to the machining section, brings the measuring probe into contact with the workpiece on the table to measure the lateral position, attaches the milling jig to the machining section to perform top surface milling, and attaches the chamfering jig to the machining section to perform chamfering.

Description

Technical Field

[0001] The present invention relates to a milling apparatus and a milling method.

Background Art

[0002] Conventionally, there has been known an apparatus that automatically removes burrs formed on an edge and finishes the edge when machining a workpiece. Conventionally, for a workpiece held with high precision, a robot has caused a tool to follow the edge of the workpiece to remove burrs or chamfer.

[0003] Patent Document 1 discloses an apparatus for performing face milling. The deburring apparatus disclosed in Patent Document 2 acquires shape data of a deburring site and the posture of a tool based on three-dimensional data of a workpiece, and controls the operation of a robot. However, there is a problem that when, for example, a gear is a workpiece, which is not normally drawn with three-dimensional data such as CAM, new three-dimensional data of the workpiece has to be created and acquired.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] [[ID=4�]] When machining a workpiece having a simple shape such as a plate member with a rectangular contour, after performing milling using an apparatus such as that of Patent Document 1, in fact, an operator chamfers and deburrs with a hand-held tool. In this case, there is a possibility that the machining accuracy may decrease. Further, in this case, when machining a C surface having a large dimension, the accuracy may not be sufficient. In contrast, Patent Document 2 describes the machining of workpieces with a small thickness, such as gears. In a device like the one in Patent Document 2, when performing top surface milling using a magnetic table, data such as the position and dimensions of the workpiece must be entered in advance. Although a device like the one in Patent Document 2 has many setting steps, it is possible to perform accurate machining.

[0006] However, devices like the one in Patent Document 1 cannot obtain accurate data, and accurate data is necessary for deburring and chamfering. Therefore, devices like the one in Patent Document 1 have the problem that a separate device configuration is required to measure the workpiece position, etc., in order to obtain accurate data. In contrast, while Patent Document 2 can maintain machining accuracy, it has the problem that machining simpler shaped workpieces requires too much effort in terms of data input, etc. In particular, when machining workpieces with simple shapes such as rectangular contours when viewed from above, deburring and chamfering require data input that is too complicated relative to the positional accuracy, resulting in a long processing time.

[0007] Furthermore, milling generates burrs around the machined surface, and these burrs can sometimes make it difficult to measure the position of the workpiece.

[0008] This invention has been made in view of the above circumstances and aims to achieve the following objectives. 1. For workpieces with simple shapes, it is possible to maintain the processing accuracy of deburring and chamfering even while reducing the number of data input steps. 2. Maintain a wide width when measuring workpiece position and dimensions. [Means for solving the problem]

[0009] (1) A milling apparatus according to one aspect of the present invention is A table on which a workpiece having a roughly rectangular outline when viewed from above is placed, A machining section that moves relative to the table and is capable of milling the top surface of the workpiece, A measuring probe attached to the aforementioned processing section, A milling jig attached to the aforementioned machining section, A chamfering jig attached to the aforementioned processing section for deburring or chamfering, A stock unit is provided that allows the measuring probe, the milling jig, and the chamfering jig to be switched and attached to the machining tool, A control unit that attaches the measuring probe from the stock unit to the processing unit and brings the measuring probe into contact with the workpiece on the table to measure the lateral position, attaches the milling jig from the stock unit to the processing unit and performs top surface milling, and attaches the chamfering jig from the stock unit to the processing unit and performs chamfering, Having, This resolved the above issues. (2) The milling apparatus of the present invention, in the above (1), The measuring probe outputs data to the control unit via wireless communication. It is possible. (3) The milling apparatus of the present invention, in the above (1), The measuring probe has a disc-shaped stylus, It is possible. (4) Another aspect of the present invention is a milling method using a milling apparatus described in any of (1) to (3) above, A preparation step of placing the workpiece on the table, A measurement step in which the measuring probe is attached to the processing unit and the measuring probe is brought into contact with the workpiece on the table to measure the lateral position, A milling process is performed after the measurement process, in which the milling jig is attached to the processing section and the upper surface is milled. A chamfering step is performed after the milling step, in which the chamfering jig is attached to the machined part and the chamfering is performed based on the data obtained in the measurement step. Having, It is possible. (5) The milling method of the present invention, in the above (4), In the measurement step, the measuring probe is viewed from above and contacts both ends of each contour side of the workpiece which has a substantially rectangular contour. It is possible. (6) The milling method of the present invention, in the above (4), In the measurement step, the measurement data from the measuring probe is transmitted wirelessly to the control unit. It is possible.

[0010] According to the configuration described in (1) above, by performing measurements before the top surface milling, it is possible to measure the workpiece without being affected by burrs or chips formed by the top surface milling, and to obtain accurate data. This makes it easy to perform accurate chamfering based on measurement data. Moreover, by simply replacing the jig attached to the machining unit that performs top surface milling with a measuring probe, it becomes possible to perform accurate workpiece machining without adding any other equipment configurations that do not affect the movement of the machining unit. Here, chamfering refers to the processing of the edge of a workpiece, and includes not only chamfering but also deburring and other necessary edge finishing processes.

[0011] According to the configuration described in (2) above, when the measuring probe is attached to the machining section, data signals can be output to the control unit without using wired communication such as wires. This allows the machining section to move relative to the workpiece without being hindered by wires when performing measurements with the measuring probe. Furthermore, the influence of wires can be eliminated when replacing the measuring probe with other jigs and attaching them to the machining section.

[0012] According to the configuration of (3) above, when measuring the position and dimensions of the workpiece by contacting the side surface near the upper surface of the workpiece, the edge of the disk-shaped stylus abuts against the side surface of the workpiece. For this reason, corresponding to the length of the disk diameter of the stylus, when the disk edge, which is the measurement position of the stylus, abuts against the side surface of the workpiece, the burr does not abut against the shaft portion at the center of the stylus. Therefore, it is possible to measure the position and dimensions of the workpiece without being affected by the burr and maintain the accuracy of the data. Thereby, the machining accuracy of chamfering can be maintained.

[0013] According to the configuration of (4) above, since data on the position and dimensions of the workpiece can be acquired as a measurement process prior to the milling process, even when burrs are formed in the top surface milling process, the chamfering process can be performed based on the measured data without being affected by the burrs. Thereby, it does not take time to grasp the position and dimensions of the workpiece, and the processing cycle time does not become long. Also, there is no need to newly incorporate a dedicated mechanism for acquiring data on the position and dimensions of the workpiece into the device. By simply adding a measuring element to the existing mechanism, it is possible to reduce the cost increase due to the manufacturing cost of the device and the labor and time for setup change, and perform deburring and edge finishing that can accurately process the workpiece and enable high-precision workpiece processing.

[0014] According to the configuration of (5) above, when performing top surface milling and chamfering on a workpiece that is substantially rectangular when viewed from above, the time required to acquire data on the position and dimensions of the workpiece is reduced, and the processing cycle time does not become long. Moreover, while reducing the labor and time for setup change, it is possible to perform deburring and edge finishing that can maintain the machining accuracy of the workpiece and enable high-precision workpiece processing.

[0015] According to the configuration described in (6) above, there is no need to newly incorporate a dedicated mechanism for acquiring workpiece position and dimensional data into the existing equipment. By simply adding a measuring probe to the existing mechanism, it is possible to process workpieces with high precision and perform deburring and edge finishing that enables high-precision workpiece processing. This reduces the cost increase due to the manufacturing cost of the equipment, as well as the time and effort required for setup changes. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a milling apparatus and milling method that can maintain the processing accuracy of deburring and chamfering even when reducing the number of data input steps for workpieces with simple shapes, and that can maintain the width in workpiece position and dimension measurement. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic diagram showing an embodiment of a milling machine according to the present invention. [Figure 2] This is a flowchart showing an embodiment of the milling method according to the present invention. [Figure 3] This is a top view showing the measurement process in an embodiment of the milling method according to the present invention. [Figure 4] This is a side view showing the measurement process in an embodiment of the milling method according to the present invention. [Modes for carrying out the invention]

[0018] Hereinafter, embodiments of the milling apparatus and milling method according to the present invention will be described with reference to the drawings. The dimensions, materials, and other specific numerical values ​​shown in this embodiment are merely illustrative examples to facilitate understanding of the invention and do not limit the present invention unless otherwise specified. Furthermore, elements not directly related to the description may be omitted from the illustrations in this specification. Figure 1 is a schematic diagram showing a milling machine according to this embodiment. In the figure, reference numeral 10 denotes the milling machine. In the figure, X, Y, and Z are orthogonal to each other, the X and Y directions represent the horizontal direction, and the Z direction represents the vertical upward direction.

[0019] The milling apparatus 10 according to this embodiment is an apparatus that performs milling and chamfering on a workpiece 50. As shown in Figure 1, the milling machine 10 according to this embodiment includes a machining unit 11, a drive unit 12, a magnetic table (table) 13, a stock unit 14, a control unit 15, and a plurality of jigs 20.

[0020] The machining unit 11 performs machining on the workpiece 50 by exchanging multiple jigs 20. The machining unit 11 is movable relative to the magnetic table 13. The machining unit 11 is movable relative to the magnetic table 13 by the drive unit 12. The machining unit 11 is driven, for example, in orthogonal XYZ directions according to control signals output from the control unit 15. The machining unit 11 can assume various positions by rotating electric motors (servo motors) (not shown) provided in each part according to control signals output from the control unit 15. The machining unit 11 is equipped with a chuck on which jigs 20 can be attached. The machining unit 11 is configured to be able to rotate the machining jigs among the attached jigs 20.

[0021] The drive unit 12 can move the machining unit 11 relative to the magnetic table 13, for example, in the orthogonal XYZ directions. The drive unit 12 can move the machining unit 11 while maintaining the orientation of the jig 20 relative to the workpiece 50, according to the control signal output from the control unit 15. The drive unit 12 may also move the machining unit 11 with the jig 20 tilted at a predetermined angle relative to the workpiece 50, for example.

[0022] The drive unit 12 is positioned above the magnet table 13. The drive unit 12 may include, for example, a movement restricting unit extending in the orthogonal XYZ directions, a gripping unit that grips the machining unit 11 with respect to the movement restricting unit, and a drive force supply unit that supplies driving force for jig rotation to the machining unit 11 gripped by the gripping unit. In this embodiment, the drive unit 12 may have a movement restricting rail that serves as the movement restricting unit extending in the XYZ directions. The drive unit 12 may also have a robot arm that drives the machining unit 11 in three dimensions.

[0023] The magnetic table 13 is fixedly installed on the floor or the like. The processing unit 11 is configured to be movable relative to the magnetic table 13. The magnetic table 13 can also be configured to be movable relative to the processing unit 11. In this case, it is possible to provide a table drive unit that corresponds to the drive of the magnetic table 13, similar to the drive unit 12 for the processing unit 11.

[0024] The magnetic table 13 maintains a horizontal upper surface. The magnetic table 13 places a workpiece 50 on its upper surface. The magnetic table 13 can securely hold the workpiece 50 on its upper surface. The magnetic table 13 may have holding means on its upper surface for holding the workpiece 50. The magnetic table 13 may have, for example, magnets positioned near its upper surface as holding means, capable of attracting the workpiece 50, such as iron.

[0025] The stock section 14 is capable of accommodating multiple jigs 20. The stock section 14 accommodates multiple jigs 20 so that they can be interchanged by the machining section 11. The stock section 14 is positioned so that the multiple jigs 20 can be interchanged by the machining section 11. The stock section 14 is positioned near the magnetic table 13. The stock section 14 may have a mechanism that allows the multiple jigs 20 to be switched between a storage position and a mounting position so that the machining section 11 can mount a selection of the multiple jigs 20.

[0026] The control unit 15 is connected to the machining unit 11. The control unit 15 outputs a control signal to the machining unit 11. The control unit 15 controls the drive of the machining unit 11. The control unit 15 controls the machining unit 11 to drive the drivable jig 20. The control unit 15 is connected to the drive unit 12. The control unit 15 outputs a control signal to the drive unit 12. The control unit 15 controls the drive of the drive unit 12. The control unit 15 controls the drive unit 12 to control the position of the machining unit 11. The control unit 15 controls the drive unit 12 to replace the jig 20 mounted on the machining unit 11.

[0027] The control unit 15 controls the drive unit 12 to acquire position data and dimensional data of the workpiece 50 when the measuring probe 21, described later, is attached to the machining unit 11 as a jig 20. The control unit 15 receives the position data and dimensional data of the workpiece 50 output by the measuring probe 21. The control unit 15 stores the position data and dimensional data of the workpiece 50. The control unit 15 stores the position data and dimensional data of the workpiece 50 during the machining process. The control unit 15 controls the drive unit 12 based on the stored data. The control unit 15 stores machining data for controlling the drive unit 12. The control unit 15 has an input interface for inputting machining data for controlling the drive unit 12. The control unit 15 has a display interface for outputting the position data and dimensional data of the workpiece 50 output by the measuring probe 21.

[0028] The jig 20 is housed in the stock section 14. The jig 20 can be selectively removed from the stock section 14 by the machining section 11. Each jig 20 has a chuck at its upper end that is chucked by the machining section 11. Multiple types of jigs 20 are provided. The jig 20 includes a measuring probe 21 for measuring the workpiece 50, a rough milling jig 22 for rough milling the workpiece 50, a finish milling jig 23 for finish milling the workpiece 50, and a chamfering jig 24 for chamfering the workpiece 50. The rough milling jig 22 and the finish milling jig 23 are milling jigs. It is also possible to use only one of the rough milling jig 22 or the finish milling jig 23.

[0029] The measuring probe 21 includes a disc-shaped stylus 21a, a shaft portion 21b, and a measuring communication portion 21c. The disc-shaped stylus 21a is, for example, a ceramic disc. The lower end of the shaft portion 21b is connected to the center of the disc-shaped stylus 21a. When the disc-shaped stylus 21a is not in contact with the workpiece 50, its main surface is aligned horizontally. The shaft portion 21b extends downward from the lower end of the measuring and communication unit 21c. The diameter of the shaft portion 21b is smaller than the diameter of the disc-shaped stylus 21a. The shaft portion 21b is the axial portion.

[0030] The measurement and communication unit 21c can measure the inclination of the shaft portion 21b when the edge of the disc-shaped stylus 21a contacts the workpiece 50 or the like placed on the magnet table 13. The measurement and communication unit 21c can return the inclined shaft portion 21b to a vertical position when the edge of the disc-shaped stylus 21a contacts the workpiece 50 or the like. The measurement and communication unit 21c can acquire position data when the edge of the disc-shaped stylus 21a contacts the workpiece 50 or the like. The measurement and communication unit 21c can transmit the position data to the control unit 15. The measurement and communication unit 21c can wirelessly transmit the position data to the control unit 15. The measurement and communication unit 21c incorporates a processing mechanism to process the acquired data so that it can be communicated, a communication device for data communication, a power supply, and other necessary devices. Since the measurement and communication unit 21c does not have a cable for transmitting data to the control unit 15, it does not obstruct the movement of the machining unit 11 by the drive unit 12.

[0031] The rough milling jig 22 is a jig capable of upper surface milling. The rough milling jig 22 is a milling cutter capable of rough milling the upper surface of a workpiece 50 placed on a magnetic table 13. The rough milling jig 22 allows the milling cutter to rotate via the machining section 11. The rough milling jig 22 can be mounted with its axis perpendicular to the machining section 11.

[0032] The finishing milling jig 23 is a jig capable of milling the top surface. The finishing milling jig 23 is a milling cutter capable of finishing the top surface of a workpiece 50 placed on a magnetic table 13. The finishing milling jig 23 allows the milling cutter to rotate via the machining section 11. The finishing milling jig 23 can be mounted with its axis perpendicular to the machining section 11.

[0033] The chamfering jig 24 is a jig capable of chamfering. The chamfering jig 24 is a jig capable of machining the edges of the workpiece 50 placed on the magnetic table 13. The chamfering jig 24 is a cutter capable of chamfering the edges of the workpiece 50. It is a cutter capable of finishing the edges of the workpiece 50. It is a cutter capable of deburring the edges of the workpiece 50. The chamfering jig 24 allows the cutter to rotate via the machining section 11. The chamfering jig 24 may be a drill, end mill, or the like, as long as it is capable of machining the edges of the workpiece 50.

[0034] Figure 2 is a flowchart showing the milling method in this embodiment. Figure 3 is a top view showing the measurement process in the milling method in this embodiment. Figure 4 is a side view showing the measurement process in the milling method in this embodiment. As shown in Figure 2, the milling method according to this embodiment includes a preparation step S00, a jig change step S01, a measurement step S11, a jig change step S02, a rough milling step S21, a jig change step S03, a finish milling step S22, a jig change step S04, and a chamfering step S31.

[0035] In preparation step S00, first, the workpiece 50 is placed on the magnetic table 13. Since the magnetic table 13 has magnets, it attracts the workpiece 50, which is made of a magnetic material such as iron. The workpiece 50 is placed so that the upper surface 51 to be milled faces upward in the Z direction (vertical direction). The workpiece 50 has a roughly rectangular contour shape when viewed from above, as shown in Figure 3, for example. The workpiece 50 is placed so that the contour edges 54 of the roughly rectangular shape when viewed from above are aligned with the X and Y directions, as shown in Figure 3, for example. The contour edges 54 are lines when the side surface 52 of the workpiece 50 is viewed from above. At this time, the placement position of the workpiece 50 is not particularly limited as long as measurement in measurement step S11 is possible.

[0036] In preparation step S00, the processing unit 11 may be fitted with any of the jigs 20. In preparation step S00, at least one or more jigs 20 are stored in the stock unit 14. In preparation step S00, the dimensions of the workpiece 50 after processing, that is, the target dimensions of the workpiece 50, are input to the control unit 15. The control unit 15 stores the input dimension data. In preparation step S00, position data such as the chamfered chamfer and processing data are input to the control unit 15.

[0037] In the jig replacement process S01, the measuring probe 21 is attached to the machining unit 11 as preparation for the next measurement process S11. The machining unit 11 selects and attaches the measuring probe 21 from the stock unit 14. At this time, if another jig 20 is attached to the machining unit 11, it is replaced. Simultaneously, the machining unit 11 returns the other jig 20 to the stock unit 14.

[0038] In measurement step S11, the position and dimensions of the workpiece 50 are measured. In measurement step S11, the positions of the four sides 52 are measured. In measurement step S11, as shown in Figures 3 and 4, the measuring probe 21 is moved to approach the workpiece 50, and the edge of the disc-shaped stylus 21a is brought into contact with the side 52 of the workpiece 50. At this time, since the disc-shaped stylus 21a protrudes from the shaft portion 21b in the XY direction, the shaft portion 21b does not come into contact with the side 52 of the workpiece 50. Since the upper surface of the disc-shaped stylus 21a is aligned with the XY direction, only the edge of the disc-shaped stylus 21a comes into contact with the side 52 of the workpiece 50. In measurement step S11, the positions of the four contour edges 54 are measured.

[0039] In the measurement process S11, the measuring probe 21, which has contacted the side surface 52 of the workpiece 50, moves further closer to the workpiece 50 after the edge of the disc-shaped stylus 21a makes contact, and stops moving the machining unit 11 when the shaft portion 21b is tilted at a predetermined angle. During this time, the measurement communication unit 21c acquires position data when the edge of the disc-shaped stylus 21a contacts the workpiece 50, etc. The measurement communication unit 21c calculates position data from the tilt angle of the shaft portion 21b. The measurement communication unit 21c wirelessly transmits the position data to the control unit 15.

[0040] In measurement step S11, the position of the contour edge 54 is measured at three locations on the contour edge 54. At this time, data is acquired from two points at predetermined distances from the corners 53 at both ends of the contour edge 54 of the rectangular contour of the workpiece 50 viewed from above, and also from data near the center of the contour edge 54. Furthermore, the data measured at the three locations is transmitted to the control unit 15.

[0041] For example, measure the three points A1, A2 at both ends and M2 at the center of the lower contour edge 54 shown in Figure 3. Measure the three points A3, A4 at both ends and M4 at the center of the upper contour edge 54 shown in Figure 3. Measure the three points B1, B2 at both ends and M1 at the right contour edge 54 shown in Figure 3. Measure the three points B3, B4 at both ends and M3 at the center of the left contour edge 54 shown in Figure 3. These data are used to calculate the position, shape, and dimensions of workpiece 50.

[0042] At this time, the control unit 15, which receives the measurement data, calculates a straight line corresponding to the contour edge 54 from the data of the two points at both ends and compares it with the data of one point near the center. If the data value of the one point near the center falls within a predetermined range relative to the calculated straight line, the measurement proceeds to the next contour edge 54. If the data value of the one point near the center is greater than the predetermined range relative to the calculated straight line and does not fall within the predetermined range, the measurement is stopped and an alert is displayed.

[0043] In measurement step S11, to measure the position of the contour edge 54, as shown in Figure 4, the edge of the disc-shaped stylus 21a is brought into contact with the side surface 52 located a predetermined distance below the upper surface 51 of the workpiece 50. When measuring multiple locations, the edge of the disc-shaped stylus 21a is brought into contact with the side surface 52 at the same height. Once the position measurements of the four contour edges 54 are completed and the data has been transmitted, the measurement process S11 is terminated.

[0044] Once the measurement process S11 is completed, the control unit 15 calculates the position of the edge 54 of the workpiece 50 and the position data and processing data such as the C-chamfer required for the chamfering process applied to the edge 54, based on the acquired data, before starting the chamfering process S31. Once the measurement process S11 is completed, the control unit 15 can proceed to the jig replacement process S02 simultaneously with the data calculation before starting the chamfering process S31.

[0045] In the jig exchange process S02, as preparation for the next rough milling process S21, the measuring probe 21 that was attached to the machining section 11 is returned to the stock section 14. Furthermore, the rough milling jig 22 is selected from the stock section 14 and attached to the machining section 11.

[0046] In the rough milling process S21, the control unit 15 controls the drive unit 12 to move the machining unit 11. In the rough milling process S21, the rough milling jig 22 attached to the machining unit 11 is driven. The rough milling jig 22 performs rough milling on the upper surface 51 of the workpiece 50 placed on the magnetic table 13. The rough milling jig 22 performs rough milling based on the position data of the upper surface 51 stored in the control unit 15.

[0047] In the jig exchange process S03, as preparation for the next finish milling process S22, the rough milling jig 22 that was attached to the machining section 11 is returned to the stock section 14. Furthermore, the finish milling jig 23 is selected from the stock section 14 and attached to the machining section 11.

[0048] In the finishing milling process S22, the control unit 15 controls the drive unit 12 to move the machining unit 11. In the finishing milling process S22, the finishing milling jig 23 attached to the machining unit 11 is driven. The finishing milling jig 23 performs finishing milling on the upper surface 51 of the workpiece 50 placed on the magnetic table 13. The finishing milling jig 23 performs finishing milling based on the position data of the upper surface 51 stored in the control unit 15. After the completion of the finishing milling process S22, burrs may be formed around the upper surface 51 of the workpiece 50.

[0049] In the jig replacement process S04, as preparation for the next chamfering process S31, the finishing milling jig 23 that was attached to the machining section 11 is returned to the stock section 14. Furthermore, the chamfering jig 24 is selected from the stock section 14 and attached to the machining section 11.

[0050] In the chamfering process S31, the control unit 15 controls the drive unit 12 to move the machining unit 11. In the chamfering process S31, the chamfering jig 24 attached to the machining unit 11 is driven. The chamfering jig 24 performs chamfering on the edge 54 of the workpiece 50 placed on the magnetic table 13. The chamfering jig 24 performs chamfering based on the position of the edge 54, shape data such as the chamfer, and machining data calculated by the control unit 15. Here, chamfering includes processes such as deburring and edge finishing.

[0051] Once the chamfering process S31 is complete, the processed workpiece 50 is moved outward from the magnetic table 13, and if processing is to be performed on the next workpiece 50, the process returns to the preparation process S00.

[0052] According to this embodiment, since the contour edge 54 is measured as a measurement step S11 before the rough milling step S21 and the finish milling step S22, it is possible to measure the position of the edge 54 without being affected by burrs or chips formed in the rough milling step S21 and the finish milling step S22. This makes it possible to obtain accurate position data of the edge 54. Therefore, in the chamfering step S31, accurate machining can be performed to form a chamfer with a predetermined accuracy. Moreover, by simply replacing the jig 20 to which the machining unit 11 is mounted with the measuring probe 21, it is possible to perform accurate chamfering on the workpiece 50 without adding any other device configurations that do not affect the movement of the machining unit 11.

[0053] According to this embodiment, in the measurement step S01, the measuring probe 21 attached to the processing unit 11 can output a data signal to the control unit 15 without using wired communication such as wires. As a result, when performing measurement with the measuring probe 21 in the measurement step S01, the processing unit 11 can move relative to the workpiece 50 on the magnetic table 13 without being hindered by wires or the like. Furthermore, when exchanging the measuring probe 21 with other jigs 20 and attaching them to the processing unit 11 in the jig exchange steps S01 and S02, the influence of wires can also be eliminated.

[0054] According to this embodiment, in the measurement step S01, when the disc-shaped stylus 21a contacts the side surface 52 of the workpiece 50, which is near the upper surface 51, the edge of the disc-shaped stylus 21a abuts the side surface 52 of the workpiece 50 multiple times. Therefore, even if a burr is formed when the edge of the disc-shaped stylus 21a, which is the measurement position, abuts the side surface 52 of the workpiece 50, corresponding to the diameter of the disc-shaped stylus 21a, this burr will not abut the shaft portion 21b. Thus, the position and dimensions of the workpiece 50 can be measured without being affected by the burr, and the accuracy of the data can be maintained. This makes it possible to maintain the processing accuracy of the chamfering process.

[0055] According to this embodiment, since the position and dimension data of the workpiece 50 can be acquired as a measurement step S01 before the rough milling step S21, even if burrs are formed or chips are attached to the workpiece 50 during the rough milling step S21 or the finish milling step S22, the chamfering step S31 can be performed based on the data measured beforehand without being affected by the burrs. This prevents the machining cycle time from being lengthened by the time required to determine the position and dimension of the workpiece 50. Furthermore, there is no need to newly incorporate a dedicated mechanism for acquiring the position and dimension data of the workpiece 50 into the machining unit 11 or the drive unit 12. By simply adding the measuring probe 21 to the existing mechanism, cost increases and the time and effort required for setup changes can be reduced, and the workpiece 50 can be machined with high precision, enabling deburring and edge finishing that allows for high-precision workpiece machining. [Explanation of Symbols]

[0056] 10…Milling machine 11...Processing section 12…Drive unit 13…Magnetic Table (Table) 14…Stock section 15…Control Unit 20... Jig 21... Measuring element 21a...Disc-shaped stylus 22... Rough milling jig 23…Finishing milling jig 24… Chamfering jig

Claims

1. A table on which a workpiece made of magnetic material is placed and adsorbed, having a roughly rectangular outline when viewed from above, A machining section that moves relative to the table and is capable of milling the top surface of the workpiece, A measuring element, which is mounted on the processing unit and has a disc-shaped stylus, outputs data to the control unit via wireless communication, A milling jig attached to the aforementioned machining section, A chamfering jig attached to the aforementioned processing section for deburring or chamfering, A stock unit is provided that allows the measuring probe, the milling jig, and the chamfering jig to be switched and mounted on the machining section, The control unit attaches the measuring probe from the stock section to the processing section and brings the measuring probe into contact with the workpiece on the table to measure the lateral position; attaches the milling jig from the stock section to the processing section and performs top surface milling; and attaches the chamfering jig from the stock section to the processing section and performs chamfering. It has, The control unit receives and acquires three data points wirelessly: two points where the measuring probe contacts two points at predetermined distances from the corners at both ends of the contour edge of the workpiece, which has a substantially rectangular contour, when viewed from above; and one point near the center of the contour edge. From the data of the two points mentioned above, a straight line corresponding to the contour edge is calculated, The calculated straight line is compared with the data of the single point, and if the data of the single point falls within a predetermined range relative to the straight line, the top surface milling is performed. Chamfering is performed based on the calculated straight line. A milling machine characterized by the following features.

2. The measuring probe has the edge of the disc-shaped stylus in contact with the side surface of the workpiece at a predetermined distance below the upper surface, and the edge of the disc-shaped stylus is in contact with the side surface at the same height when measuring at multiple locations. The milling apparatus according to claim 1, characterized in that it is a milling apparatus.

3. A mechanism for acquiring data on the position and dimensions of the workpiece, having the measuring probe, The milling apparatus according to claim 1, characterized in that it is a milling apparatus.

4. A milling method using a milling apparatus according to any one of claims 1 to 3, A preparation step of placing the workpiece on the table, A measurement step in which the measuring probe is attached to the processing unit and the measuring probe is brought into contact with the workpiece on the table to measure the lateral position, A milling process is performed after the measurement process, in which the milling jig is attached to the processing section and the upper surface is milled. A chamfering step is performed after the milling step by attaching the chamfering jig to the machined part and performing chamfering based on the position and dimensional data of the workpiece obtained in the measurement step before the milling step. It has, In the measurement process described above, the measuring probe is viewed from above and contacts two points at predetermined distances from the corners at both ends of the contour edge of the workpiece, which has a substantially rectangular contour. The data obtained consists of three points: the two points where the measuring probe contacts the workpiece, which has a substantially rectangular contour, and the data obtained from one point near the center of the contour edge. The measurement data from the measuring probe is transmitted wirelessly to the control unit. From the data of the two points mentioned above, the straight line corresponding to the contour edge is calculated, The process proceeds to the next step if the data of the single point falls within a predetermined range relative to the line, after comparing the line with the data of the single point. In the chamfering process, the chamfering is performed based on the straight line calculated in the measurement process. A milling method characterized by the following:

5. In the preparation step, The workpiece is placed on the table in a position where it can be measured in the measurement process. The milling method according to feature 4.

6. In the measurement step, The edge of the disc-shaped stylus is brought into contact with the side surface of the workpiece, which is located a predetermined distance below the upper surface of the workpiece, and the edge of the disc-shaped stylus is brought into contact with the side surface at the same height during measurements at multiple locations. The milling method according to feature 4.

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