JP2022056024A - Processing device, and automatic correction method for processing device - Google Patents

Abstract

To secure a sufficient processing space even when a sensor is attached and to perform dimension correction automatically .SOLUTION: A processing device 1 includes a chuck 5 for gripping a material 2 to be processed rotatably, a chuck holding part 6 for holding the chuck 5, a tool 3, and a tool holding part 4 for holding the tool 3, a vibration sensor 11 attached to a main structure portion 7, an analysis converter 12 and a control unit 13.SELECTED DRAWING: Figure 2

Description

The present invention relates to a processing apparatus for controlling dimensions after processing and an automatic correction method.

When machining a material to be machined with multiple or multiple types of tools with a machining device such as an automatic lathe and producing one product by continuous machining, control the dimensions of the continuously machined products after machining. Is common, and after processing a predetermined number of products, the processed product is taken out, each dimension is measured, and a correction value is input to the machine to correct the difference from the target dimension. rice field.

Patent Document 1 describes a manufacturing apparatus that uses a contact detection sensor to detect that the cutting edge has hit the machined portion and performs blade alignment in order to grasp the positional relationship between the cutting edge and the machined portion.

Japanese Unexamined Patent Publication No. 2010-188484

When the positional relationship between the cutting edge and the machined portion is detected using the manufacturing apparatus described in Patent Document 1 and an attempt is made to correct the processing deviation, a sensor is inserted in the processing head (blade holder, tool holder) to which the blade is attached. There was a problem that the processing head had to be enlarged in order to secure the installation space.

Further, since a normal automatic lathe or the like uses a plurality of types of tools to machine one product, the manufacturing apparatus of Patent Document 1 requires one sensor for one blade. Therefore, it is necessary to have a number of sensors according to the number of tools, and it is difficult to install them in a limited machining space. Also, the correction itself must be done manually.

An object of the present invention is that a sufficient processing space can be secured even if a sensor is attached, and dimensional correction is automatically performed.

A processing device that processes the outer shape or inner shape by relatively moving or rotating the work material and the tool, and processes the chuck for holding the work material and the work material held by the chuck. A tool holding unit that holds at least one tool for performing, a vibration sensor for detecting vibration, an analysis conversion unit that analyzes vibration data obtained by the vibration sensor, replaces it with a correction value, and outputs it. It is a processing device characterized by having a control unit that corrects using a correction value from the unit.

More preferably, the position where the vibration sensor is attached is the main structural part of the processing apparatus main body such as the tool holding part or the chuck holding part holding the chuck.

More preferably, the control unit numerically controls the movement of at least one of the tool holding unit and the workpiece by a computer, and corrects the pre-programmed trajectory by using the correction value output from the analysis conversion unit. Process according to.

More preferably, the analysis conversion unit is based on the interval from the data starting point at which data collection is started before the work material and the tool come into contact to the data fluctuation point at which the vibration waveform fluctuates due to the contact between the work material and the tool. Calculate the correction value.

More preferably, the vibration sensor detects the vibration of a plurality or a plurality of types of the tools, one by one.

In addition, it is an automatic correction method of a processing device that processes an outer shape or an inner shape by relatively moving or rotating the work material and the tool, and is targeted by a vibration sensor attached to the main structural part of the processing device. The process of detecting vibration data for the tool and outputting it to the analysis conversion unit, and the analysis conversion unit detects the data origin and data fluctuation point based on the vibration data, and the measurement data interval from the data origin and data fluctuation point. Is calculated, the measurement data interval and the reference data interval are compared, the fluctuation point difference is calculated, the correction value is calculated based on the fluctuation point difference, and the correction value is output to the control unit and the correction value is calculated by the control unit. It is an automatic correction method of a processing apparatus characterized by having a process of automatically correcting based on the above.

More preferably, the data starting point is a point where the detection of the vibration data is started from a position determined on the machining locus of the target tool.

More preferably, the data starting point is the point where the detection of the vibration data is started at the timing determined by the machining program of the target tool.

More preferably, the correction value is a dimensional value for correcting the processing dimension of the work material or a coordinate value on the machine for correcting the deviation of the processing locus.

According to the present invention, since the mounting position of the vibration sensor may be the main structural part of the processing apparatus main body, the processing head does not become large, and a plurality of blades are used instead of one sensor for one blade. Since it is possible to detect with one sensor, it is possible to secure a sufficient processing space even if the sensor is attached, and it is possible to automatically correct the dimensions.

It is a perspective view which showed the whole of the processing apparatus 1 of this embodiment. It is a front view seen from the processing part side of the processing apparatus 1 of this embodiment. In the figure showing the waveform of the vibration data obtained from the vibration sensor 11, (a) shows the reference data waveform 20a when processed with a predetermined dimension, and (b) shows the case where the waveform is processed in a state deviated from the predetermined dimension. It is a figure showing the measurement data waveform 20b of. It is a view from above of the processing apparatus 1 of the present embodiment, and is a view in which only the workpiece 2 and the chuck 5 are extracted. FIG. b) is a diagram showing a pre-correction machining locus 32 when deviating from the machining locus 31 and a post-correction machining locus 33 after the correction of the pre-correction machining locus 32. It is a perspective view which showed the whole of the processing apparatus 51 of another embodiment of this invention. It is a perspective view which showed the whole of the processing apparatus 101 of another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The figure of the device in each drawing exaggerates the part necessary for explanation, and is different from the actual size and size relationship.

FIG. 1 is a perspective view showing the entire processing apparatus 1 of the present embodiment, and FIG. 2 is a front view of the processing apparatus 1 as viewed from the processing portion side. The machined portion side is the side where the material 2 to be machined and the tool 3 are present and the machine is actually machined.

The machining apparatus 1 holds a chuck 5 for rotatably gripping the workpiece 2, a chuck holding portion 6 for holding the chuck 5, and a tool holder for holding the tool 3 for machining the workpiece 2. It has a part 4. Further, the tool holding portion 4 and the chuck holding portion 6 are mounted on the base 8, and each of them can move relatively in the XYZ axis direction. The main structural portion 7 includes a chuck holding portion 6, a tool holding portion 4, and a base 8. Further, the processing apparatus 1 continuously processes the work material 2 to produce a product, and the work material 2 is removed after the processing is completed, and the processing of another work material 2 is started.

The tool holding portion 4 has a tool mounting portion 4a for mounting the tool 3 and a tool mounting base portion 4b for movably holding the tool mounting portion 4a. A vibration sensor 11 is attached to the tool mounting unit 4a, and the vibration sensor 11 is connected to the analysis conversion unit 12 by wiring 14, and outputs the data obtained by the vibration sensor 11 to the analysis conversion unit 12. Further, the analysis conversion unit 12 is connected to the control unit 13 by a wiring 14, converts the data into a correction value based on the data input from the vibration sensor 11, and outputs the correction value to the control unit 13.

The control unit 13 performs correction based on the correction value input from the analysis conversion unit 12, and processes the material 2 to be processed within a predetermined dimensional range. Further, the control unit 13 controls to relatively move at least one of the chuck holding unit 6 and the tool holding unit 4.

FIG. 3 is a diagram showing the waveform of the vibration data obtained from the vibration sensor 11. FIG. 3A shows a reference data waveform 20a when processed to a predetermined size, and FIG. 3B shows a state deviated from the predetermined size. It is a figure showing the measurement data waveform 20b in the case of processing in. FIG. 4 is a view seen from above of the processing apparatus 1 of the present embodiment, and is a view in which only the workpiece 2 and the chuck 5 are extracted, and FIG. 4A is a processing locus 31 when a predetermined dimension is processed. (B) is a diagram showing a pre-correction machining locus 32 when the machining locus 31 deviates from the machining locus 31 and a post-correction machining locus 33 after the correction of the pre-correction machining locus 32. Further, in FIG. 4B, the corrected machining locus 33 and the post-correction machining locus 33 are slightly shifted in the Z direction in order to make it easier to see the pre-correction machining locus 32 and the post-correction machining locus 33.

The vibration sensor 11 always detects vibration data, but at least one of the determined point on the machining locus 31 of the tool 3 and the timing determined by the machining program is set as the data starting point 21, and the vibration data is of the vibration data. The points where the waveform greatly fluctuates are detected as the data fluctuation points 22a and 22b.

FIG. 3A shows a reference data waveform 20a when a predetermined dimension is processed. A point where the waveform greatly fluctuates is a data fluctuation point 22a, and a reference data is between the data starting point 21 and the data fluctuation point 22a. The interval is 24. FIG. 3B shows the measurement data waveform 20b when the waveform is processed in a state deviated from a predetermined dimension, and the point where the waveform greatly fluctuates is defined as the data fluctuation point 22b, and the data fluctuation point 22b from the data starting point 21. The interval is set to the measurement data interval 25.

The reference data waveform 20a is a waveform that serves as reference data when the work material 2 is machined to a target predetermined dimension, and the value and the waveform are different depending on the place to be machined and the tool 3 to be used. 3 (a) is an example. The measurement data waveform 20b is a waveform when one workpiece 2 is machined with one tool 3 during actual continuous machining, and the waveform is detected for each tool 3 used. 3 (b) is an example.

As the reference data interval 24, the material 2 to be processed may be processed before the continuous processing is performed, and the data obtained in advance may be used. You may use the average value of the above.

The analysis conversion unit 12 sets the interval of the difference between the reference data interval 24 and the measurement data interval 25 as the fluctuation point difference 23, calculates the correction value from the fluctuation point difference 23, and outputs the correction value to the control unit 13 to perform the correction. As the correction value, at least one of the dimension value for correcting the dimension of the workpiece 2 and the coordinate value in the machining apparatus 1 for correcting the machining locus 31 of the tool 3 is selected and output to the control unit 13. This will automatically correct it.

FIG. 4A shows a machining locus 31 for relatively moving the tool 3 in order to machine the workpiece 2 with a predetermined dimension.

The pre-correction machining locus 32 in FIG. 4B represents a state in which the machining locus 32 deviates from the machining locus 31 due to wear of the tool, thermal displacement of the device, or the like. When machining is performed in the state of the pre-correction machining locus 32, the vibration sensor 11 outputs a waveform as shown in FIG. Will be done.

The correction method described above is a correction for bringing the pre-correction machining locus 32 closer to the machining locus 31, but is not limited to this, and is not limited to this, when the fluctuation point difference 23 obtained for each workpiece 2 exceeds a certain value. A method of outputting a predetermined correction value from the analysis conversion unit 12 to the control unit 13 and performing automatic correction may also be used.

Further, the timing corrected by the above-mentioned correction method may be during the processing of the work material 2 in order to reflect the measurement data waveform 20b on the detected work material 2, and the measurement data waveform 20b is actually detected. The timing may be reflected in another work material 2 to be processed next to the work material 2.

5 and 6 are perspective views showing the entire processing devices 51 and 101 of another embodiment of the present invention, respectively.

FIG. 5 is a processing device 51 of the same system as that of FIG. 1, and has the same configuration as that of FIG. 1 except that the vibration sensor 11 is attached to the chuck holding portion 6. Further, even if the mounting position of the vibration sensor 11 is different, it is possible to detect the vibration data waveform as in the case of the configuration of FIG. 1, and the dimensions are automatically corrected by the same processing as in the case of the configuration of FIG. It is possible and the same effect can be obtained.

FIG. 6 shows a processing device 101 for processing a bar-shaped bar material in which the material 2 to be processed is long. When the processing of the material 2 to be processed is completed, the processed portion is cut off and a new unprocessed portion appears. Then, the unprocessed portion becomes a processing target portion of the new work material 2. The processing apparatus 101 has a bush 40 on the processing portion side, and the bush 40 is held by the bush holding portion 41. On the side opposite to the machined portion side in the Z direction, a chuck 5 for rotatably gripping the workpiece 2 and a chuck holding portion 6 for holding the chuck 5 are provided.

The main structural portion 7 includes a chuck holding portion 6, a tool holding portion 4, a bush holding portion 41, and a base 8. Further, the chuck holding portion 6 can be moved in the Z direction, and the tool holding portion 4 can be moved in the X direction and the Y direction. Further, even if the mounting position of the vibration sensor 11 is different, it is possible to detect the vibration data waveform as in the case of the configuration of FIG. 1, and the dimensions are automatically corrected by the same processing as in the case of the configuration of FIG. It is possible and the same effect can be obtained.

Even in the case of the processing devices 51 and 101 having the configurations of FIGS. 5 and 6, vibration is detected by the same method as that of the processing apparatus 1 having the configuration of FIG. 1, and automatic correction is performed by the same processing.

The processing devices 1, 51, 101 in the present embodiment have an automatic lathe configuration, the processing devices 1, 51 use a general chucker machine, and the processing device 101 uses a general spindle moving lathe. However, the system of the apparatus itself is not limited as long as it can detect vibration during machining of the tool 3 and the workpiece 2. As an example, the same effect can be obtained with a device such as a milling machine or a grinding machine. In addition, various changes and alternative configurations that do not deviate from the scope of the technical idea of the present invention are included in the present invention.

1 Processing equipment
2 Work material 3 Tool 4 Tool holding part 4a Tool mounting part 4b Tool mounting base 5 Chuck 6 Chuck holding part 7 Main structure part 8 Base 11 Vibration sensor 12 Analysis conversion part 13 Control part 14 Wiring 20a Reference data Waveform 20b Measurement data Waveform 21 Data origin 22a, 22b Data fluctuation point 23 Fluctuation point difference 24 Reference data interval 25 Measurement data interval 31 Machining locus 32 Machining locus 32 Pre-correction machining locus 33 Post-correction machining locus 40 Bush 41 Bush holding part 51 Machining device 101 Machining device

Claims (10)

A processing device that processes an outer shape or an inner shape by relatively moving or rotating the work material and the tool.
A chuck for holding the work material and
A tool holding portion that holds at least one of the tools for machining the work material held by the chuck, and a tool holding portion.
A vibration sensor for detecting vibration, and
An analysis conversion unit that analyzes the vibration data obtained by the vibration sensor, replaces it with a correction value, and outputs it.
A control unit that corrects using the correction value from the analysis conversion unit,
A processing device characterized by having. The processing apparatus according to claim 1, wherein the position where the vibration sensor is attached is a main structural portion of the processing apparatus main body such as the tool holding portion or the chuck holding portion holding the chuck. The control unit numerically controls the movement of at least one of the tool holding unit and the work material by a computer, and corrects the pre-programmed trajectory by using the correction value output from the analysis conversion unit. The processing apparatus according to claim 1 or 2, wherein the processing is performed according to the above. The analysis conversion unit also has an interval from a data starting point at which data collection is started before the work material comes into contact with the tool to a data fluctuation point at which the vibration waveform fluctuates due to the contact between the work material and the tool. The processing apparatus according to claim 1 to 3, wherein the correction value is calculated. The processing apparatus according to claim 1 to 4, wherein the vibration sensor detects the vibration of a plurality or a plurality of types of the tools. The correction value according to claims 1 to 5, wherein the correction value is a dimensional value for correcting the processing dimension of the work material or a coordinate value on a machine for correcting a deviation of the processing locus. Processing equipment. It is an automatic correction method of a processing device that processes an outer shape or an inner shape by relatively moving or rotating the work material and the tool.
A process of detecting vibration data for the target tool by a vibration sensor attached to the main structural part of the processing device and outputting it to the analysis conversion unit.
The analysis conversion unit detects a data origin and a data fluctuation point based on the vibration data, calculates a measurement data interval from the data origin and the data fluctuation point, and determines the measurement data interval and the reference data interval. Processing that calculates the fluctuation point difference by comparison, calculates the correction value based on the fluctuation point difference, and outputs it to the control unit.
Processing that automatically corrects based on the correction value by the control unit,
An automatic correction method for processing equipment, characterized in that it has. The automatic processing device of the processing device according to claim 7, wherein the data starting point is a point at which the detection of the vibration data is started from a position determined on the machining locus of the target tool. Correction method. The automatic correction method for a machining apparatus according to claim 7, wherein the data starting point is a point at which the detection of the vibration data is started at a timing determined by the machining program of the target tool. The correction value according to claims 7 to 9, wherein the correction value is a dimensional value for correcting the processing dimension of the work material or a coordinate value on a machine for correcting the deviation of the processing locus. Automatic correction method for processing equipment.

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