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WO-2026094768-A1 - DATA PROCESSING DEVICE AND DETECTION SYSTEM

WO2026094768A1WO 2026094768 A1WO2026094768 A1WO 2026094768A1WO-2026094768-A1

Abstract

In the present invention, a tool is mounted to a spindle of a machine tool by using a tool holder. The machine tool is provided with a sensor for measuring the tool holder. Measurement data related to the state of the tool holder is generated on the basis of the measurement results from the sensor. A measurement set, which is a combination of two or more measurement data items selected from a plurality of types of measurement data items, is outputted to an external device such as the machine tool.

Inventors

  • SHINODA YUKI

Assignees

  • 株式会社東京精密

Dates

Publication Date
20260507
Application Date
20251023
Priority Date
20241101

Claims (11)

  1. A data processing device comprising: a control unit that generates multiple types of measurement data indicating the mounting state of the tool holder to the spindle based on data obtained from a sensor that measures the tool holder connecting the spindle and the tool in a machine tool; and outputs a measurement set, which is a combination of two or more measurement data selected from the multiple types of measurement data, to an external device.
  2. When the display target is selected and changed from the first measurement set to the second measurement set, the control unit transmits an erase signal to the external device to instruct the display of the first measurement set to be erased before the display of the second measurement set begins. The data processing device according to claim 1, which, on the condition that new data is obtained from the sensor, generates measurement data corresponding to the second measurement set based on the updated data, and instructs the external device to display the second measurement set after the display of the first measurement set has been cleared.
  3. The data processing device according to claim 2, wherein the control unit, after transmitting the erase signal for the first measurement set to the external device, instructs the external device to display an image indicating that data display switching is in progress until the acquisition of new data from the sensor is completed.
  4. The aforementioned multiple types of measurement data include: Before machining, a first reference data showing the displacement of the outer surface of the tool holder when the first tool is attached to the spindle, The data processing device according to claim 1, which includes first inspection data showing the displacement of the outer surface of the tool holder after the tool to be mounted on the spindle is changed from another tool to the first tool during machining.
  5. The aforementioned multiple types of measurement data include: The first reference data and, The second reference data is the corrected data of the first reference data, The first test data and, The data processing apparatus according to claim 4, which includes a second inspection data that is corrected data of the first inspection data.
  6. The data processing device according to claim 5, wherein the control unit generates a measurement set by combining two types of measurement data from the first reference data, the second reference data, the first inspection data, and the second inspection data.
  7. The data processing device according to claim 5, wherein the control unit determines whether or not the tool is properly mounted on the spindle based on the comparison result of the first reference data and the first inspection data, or the comparison result of the second reference data and the second inspection data.
  8. The data processing device according to claim 1, wherein the control unit displays graphs of two or more measurement data selected by the user from among the multiple types of measurement data, superimposed on the same data display area.
  9. A data processing device according to any one of claims 1 to 7, which is connected via a communication line to a machine tool having a tool attached to a tool holder mounted on the spindle, A detection system comprising a sensor for measuring the displacement of the outer surface of the tool holder.
  10. The detection system according to claim 9, wherein the transmitting unit of the machine tool transmits the measurement data as data indicating a change in the outer diameter of the tool holder over at least one rotation by changing the relative position of the tool holder and the sensor.
  11. A function to control a spindle on which a tool can be mounted via a tool holder, and to measure the displacement of the outer surface of the tool holder while it is connected to the spindle, A function to transmit the state data obtained as a result of the above measurement to an external device, A function to receive measurement data generated from the external device based on the status data, A function that allows the user to select from multiple data sets generated based on measurement data, A program for inspecting the mounting of tools in a machine tool, which has a function to generate a measurement screen for displaying the selected data set, and causes a computer to perform this function.

Description

Data processing device and detection system This invention relates to a technique for inspecting the mounting condition of a tool on the spindle of a machine tool. Machine tools include turning centers, which process a workpiece by applying a cutting tool to a rotating workpiece; machining centers, which process a workpiece by applying a rotating tool to the workpiece; and multi-tasking machines, which combine these functions. Some machine tools have an external magazine (tool storage compartment) that stores a large number of tools. The machine tool then processes the workpiece by taking the necessary tools from the tool storage compartment as needed and mounting them on the spindle. The tool is fixed to a tool holder with a conical connecting section, and the tool is fixed to the spindle when this tool holder is fitted into a hole in the spindle. During machining, a large amount of foreign matter such as chips, oil mist, and iron filings is generated. If such foreign matter gets into the connection between the tool holder and the spindle, and the tool holder is inserted into the spindle, the axial direction of the tool holder will be slightly misaligned, causing the axis of the tool and the axis of the spindle to no longer align. Rotating the spindle in this state will cause tool runout, reducing the machining accuracy of the workpiece. This is a hardware configuration diagram of the machining system.This is a schematic diagram showing the mounting state of the tool and spindle.This is a top view showing the positional relationship between the tool holder and the sensor.This is a functional block diagram of a machine tool.This is a functional block diagram of the measuring device.This is a screenshot of the processing screen.This is the first screen diagram of the measurement screen.This is the second screen diagram of the measurement screen.This is the third screen diagram of the measurement screen.This flowchart shows the processing steps after tool replacement. Figure 1 is a hardware configuration diagram of the processing system 200. The machining system 200 includes a machine tool 300 such as a machining center for machining a workpiece, a measuring device 100 as an example of a data processing device for analyzing the mounting status of the spindle and tool, and a PC (Personal Computer) 400. The PC 400 is optional. Hereinafter, the inspection of the mounting status of the spindle and tool will be called "mounting inspection," and if they are properly mounted (chucking), it will be called "normal mounting," and if they are not properly mounted, it will be called "improper mounting (chucking error)." The measuring device 100 and the machine tool 300, and the measuring device 100 and the PC 400 are connected to each other by a LAN (Local Area Network) cable. The machine tool 300 is equipped with a monitor 302. The PC 400 is also equipped with a monitor 402. The measuring device 100 may also be equipped with a built-in monitor. The monitor 302 of the machine tool 300 can display the workpiece machining screen as well as screens provided by other devices. The measuring device 100 generates the measurement screen described later. In this embodiment, the machine tool 300 can display the measurement screen (described later) provided by the measuring device 100. The user can switch between displaying the machining screen and the measurement screen on the monitor 302 of the machine tool 300. The measurement screen provided by the measuring device 100 is also displayed on the monitor 402 of the PC 400. Figure 2 is a schematic diagram showing the mounting state of the tool and spindle. The tool changing device (not shown) of the machine tool 300 takes a tool 202 from the tool storage compartment (not shown) and attaches it to the spindle head 204 (the tip of the spindle), and stores the tool 202 that was attached to the spindle head 204 back into the tool storage compartment. The tool 202 is fixed to the tool holder 206, and the two are substantially integrated. The tool holder 206 includes a flange portion 206A and a projection portion 206B. The conical projection portion 206B is inserted into a mortar-shaped receiving portion 208 formed on the spindle head 204, thereby mounting the tool 202 to the spindle head 204. In Figure 2, the vertical direction, i.e., the axial direction of the tool 202 and the spindle head 204, is defined as the Z-axis, the direction towards the viewer is the X-axis, and the direction to the right is the Y-axis. A sensor 212 is attached to the spindle head 204 by a bracket 210. In this embodiment, the sensor 212 is an eddy current sensor that detects the distance d to the outer circumferential surface of the flange portion 206A of the tool holder 206. The sensor 212 is not limited to an eddy current sensor; any distance measuring sensor capable of measuring the distance d to the flange portion 206A is acceptable. The sensor 212 may also be provided as an accessory to the measuring devi