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EP-4735827-A1 - MEASURING SYSTEM AND MEASURING METHOD FOR MEASURING A TOOL

EP4735827A1EP 4735827 A1EP4735827 A1EP 4735827A1EP-4735827-A1

Abstract

In a measuring system for measuring tools by means of a measuring device (110) with which a plurality of insert modules (200) for arranging tools on the measuring device in defined positions are associated, an insert module comprises a tool receptacle for receiving a tool to be measured and a data carrier (175) for carrying module information data. The measuring device comprises a spindle unit mounted in a stationary part of the measuring device for rotation about a spindle axis and an insert-module receptacle for receiving an insert module (200) in a defined position. The measuring device comprises a control unit (190) which can be operated by means of an operating unit and a transmission system having a transmission path for automatically transmitting module information data between the data carrier (175) and the control unit (190). The control unit is configured, in an operating mode, for permanent monitoring of the insert module by reading out module information data at high frequency.

Inventors

  • GRAUER, Viktor

Assignees

  • Kelch GmbH

Dates

Publication Date
20260506
Application Date
20240627

Claims (15)

  1. 1. Measuring system (100) for measuring tools with the aid of a measuring device (110), to which a plurality of insert modules (200) for the position-defined arrangement of tools on the measuring device are assigned, wherein an insert module (200) has a tool holder (210) for holding a tool (300) to be measured and a data carrier (175) for carrying module information data; the measuring device (110) has a spindle unit (140) which is rotatably mounted about a spindle axis (145) in a stationary part of the measuring device and has an insert module holder (150) for the position-defined holding of an insert module (200); the measuring device has a control unit (190) which can be operated via an operating unit (195) and a transmission system with a transmission path for the automatic transmission of module information data between the data carrier (175) and the control unit (190) is provided, characterized in that the control unit is configured in an operating mode for permanent monitoring of the insert module by high-frequency reading of module information data.
  2. 2. Measuring system according to claim 1, characterized in that the control unit (190) is configured to read out the module information data at a clock rate of one second or less continuously from a start time to an end time, wherein preferably the start time is at the time of insertion and the end time is at the time of removal or shutdown of the system.
  3. 3. Measuring system according to claim 1 or 2, characterized in that the control unit (190) is configured to automatically detect a module status change, wherein module information data read out successively in time are automatically compared with one another in a comparison operation and an action is initiated depending on a result of the comparison.
  4. 4. Measuring system according to one of the preceding claims, characterized in that the transmission path comprises a first pair of transmitters (170) for transmitting signals between the insert module (200) and a component of the spindle unit and a second transmitter pair (180) for transmitting signals between the spindle unit (140) and the stationary part of the measuring device (110).
  5. 5. Measuring system according to claim 4, characterized in that the first transmitter pair (170) is designed for contactless transmission, in particular for inductive signal transmission.
  6. 6. Measuring system according to claim 4 or 5, characterized in that the second transmitter pair (180) is designed for contact-based transmission.
  7. 7. Measuring system according to claim 6, characterized in that the second pair of transmitters (180) has a slip ring arrangement, wherein the slip ring arrangement on the spindle unit preferably has a contact arrangement (185) with several ring-shaped contact elements running concentrically to the spindle axis, and contact elements (182) in transmission contact therewith, in particular electrically conductive brushes or spring-loaded sliding shoes, are mounted opposite one another on the stationary part of the measuring device and/or in that the slip ring arrangement is designed as an axial slip ring arrangement such that the contact elements of the interacting sides are opposite one another in the axial direction of the spindle unit (140).
  8. 8. Measuring system according to one of the preceding claims, characterized in that the data carrier (175) is designed as a writable data carrier and/or that the transmission path is designed as a bidirectionally usable transmission path.
  9. 9. Measuring system according to one of the preceding claims, characterized in that the data carrier (175) contains an RFID transponder for storing module information data and an RFID reader or an RFID read/write device is arranged on the spindle unit side.
  10. 10. Method for measuring a tool with the aid of a measuring device which has a control unit which can be operated via an operating unit and a spindle unit which can be rotated about a spindle axis and which has an insert module holder for the position-defined reception of an insert module, wherein an insert module has a tool holder for receiving a tool to be measured and a data carrier for carrying module information data which is generated by measuring of the deployment module include certain data on auxiliary coordinates and/or identification data for determining the auxiliary coordinates, the method comprising the following steps: - Selecting an insert module with data carrier that matches the tool; - Inserting the insert module into the insert module holder of the spindle unit; - Automatic transfer of module information data from the data carrier of the insert module to the measuring device before starting a measurement; - Calibration of the measuring device using the data on the auxiliary coordinates; - Inserting a tool into the tool holder; - Measuring the tool, characterized by permanent monitoring of the insert module inserted into the insert module holder by high-frequency reading of module information data.
  11. 11. Method according to claim 10, characterized in that the module information data are read out at a clock rate of 10 ms or less continuously from a start time to an end time, wherein preferably the start time is at the time of insertion and the end time is at the time of removal or shutdown of the system.
  12. 12. Method according to claim 10 or 11, characterized by automatic detection of a module status change, wherein module information data read out successively in time are compared with one another in a comparison operation and an action is initiated depending on a result of the comparison, in particular a request to an operator to acknowledge a module status change.
  13. 13. Method according to one of claims 10 to 12, characterized in that a transmission of signals along a transmission path takes place via a first interface between the insert module and a component of the spindle unit and a second interface between the spindle unit and the stationary part of the measuring device, wherein the transmission at the first interface preferably takes place contactlessly and at the second interface with contact, in particular via sliding contacts.
  14. 14. Method according to one of claims 10 to 13, characterized in that the data carrier is designed as a writable data carrier and the transmission path is used bidirectionally.
  15. 15. Use of components of an RFID identification system based on RFID transmission in a measuring device for measuring a tool, wherein an RFID transponder is used as a data carrier on an insert module, wherein module-specific module information data is stored in the data carrier; an RFID read/write head is used to read the data carrier and to write to the data carrier; module information data read from the data carrier are evaluated with an evaluation unit of the RFID identification system by means of an evaluation operation, and a control of the measuring device depending on results of the Evaluation operation is carried out.

Description

Measuring system and measuring method for measuring a tool FIELD OF APPLICATION AND STATE OF THE ART The invention relates to a measuring system and a measuring method for measuring tools with the aid of a measuring device to which several insert modules are assigned for the position-defined arrangement of tools on the measuring device. Measuring systems of the type considered here are often part of a tool measuring and setting device. A measuring device of the measuring system comprises components for holding a tool to be measured and components that serve to measure the tool held. The measuring device has a spindle unit that is mounted in a stationary part of the measuring device so that it can rotate about a spindle axis. As a rule, a coordinate slide is attached to the base body, which carries the measuring system to be aligned with the tool. Nowadays, camera systems with connected image processing are usually used as measuring systems. In order to be able to measure and/or adjust many different types of tools or tool types in a short time with such a measuring device, several insert modules for the position-defined arrangement of tools on the measuring device are assigned to a measuring device in generic measuring systems. The insert modules function as adapters to adapt the mounting geometry of the measuring device to the respective tool type or its mounting geometry. For this purpose, an insert module holder for the position-defined mounting of an insert module is designed at the freely accessible end of the spindle unit. There is a tool holder on an insert module, for example a hollow shank taper (HSK) or a steep taper (SK) tool holder. Using such insert modules enables highly flexible tool measurement and/or adjustment, since the measuring device can be quickly and easily adapted to the type of tool to be measured by exchanging insert modules. Using this measuring device, a tool inserted into the insert module can be measured in different rotational positions. When using such application modules, the measuring device must be calibrated or referenced before the actual measuring process begins in order to establish a clear relationship between the measuring coordinate system of the measuring device and the tool-side Tool coordinate system. The measuring coordinate system describes, for example, the coordinate system of the coordinate slide. The tool coordinate system refers to a logical zero point of an insert module. Its position depends on the type of standardized tool holder in the insert module. The tool parameters (e.g. tool length or tool radius) should be related to this logical zero point during the measurement. Since the logical zero point of the tool coordinate system is not accessible for measurement, an auxiliary zero point is attached to each insert module, which has a defined offset compared to the logical zero point. The offset is determined by measuring the insert module and is kept accessible on the insert module in the form of module information data so that the user can later use information about the offset for the measurement. In the past, measurement errors were more common due to operator errors, e.g. because the correct application module was not selected or because module information data was not correctly entered into the control unit. To avoid the latter problems, patent application DE 101 24 275 A1 presents a method that provides for automatic transmission of the module information data from the insert module to the measuring device. This enables automatic identification of the insert module used and automatically provides the correct data assigned to the insert module, in particular the auxiliary coordinates for the auxiliary zero point, for further measurement and evaluation. The previously usual manual input of data is thus eliminated as a possible source of error. This increases process reliability on the one hand and makes the measuring process more user-friendly on the other. The content of DE 101 24 275 A1 is incorporated into the content of this application by reference. DE 101 24 275 A1 proposes various techniques for transmitting the module information data from the application module to the measuring device. For example, inductive transmission or radio transmission is mentioned. Alternatively, optical information transmission can be used, for example with the help of a bar code on the application module and a corresponding bar code reader on the measuring device side. The data carriers on the application module include semiconductor-based data carriers, e.g. data chips, which can be writable and can be electrically contacted or read out without contact, e.g. inductively. EP 1 586 413 A1 describes a transmission of module information using a data transmission camera. The automated data transfer from the insert module to the measuring device has proven itself many times in practice. Even in generic measuring systems, a data carrier for carrying module informatio