WO2002024405A1 - Drilling system comprising electronic diameter monitoring system - Google Patents

Drilling system comprising electronic diameter monitoring system

Info

Publication number
WO2002024405A1
WO2002024405A1 PCT/EP2001/009986 EP0109986W WO0224405A1 WO 2002024405 A1 WO2002024405 A1 WO 2002024405A1 EP 0109986 W EP0109986 W EP 0109986W WO 0224405 A1 WO0224405 A1 WO 0224405A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
drilling
tool
system
according
distance
Prior art date
Application number
PCT/EP2001/009986
Other languages
German (de)
French (fr)
Inventor
Harald Zimmermann
Original Assignee
Harald Zimmermann
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/20Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups
    • G01B21/10Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring diameters
    • G01B21/14Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring diameters internal diameters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic means
    • G01B7/12Measuring arrangements characterised by the use of electric or magnetic means for measuring diameters
    • G01B7/13Internal diameters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic means
    • G01B7/28Measuring arrangements characterised by the use of electric or magnetic means for measuring contours or curvatures
    • G01B7/282Measuring arrangements characterised by the use of electric or magnetic means for measuring contours or curvatures for measuring roundness
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/58Wireless transmission of information between a sensor or probe and a control or evaluation unit

Abstract

The invention relates to a drilling system for the metal-cutting production of precise bore holes. A contactless operating device for monitoring the diameter of the hole created is integrated into the drilling tool of said system, and the measurement data determined is wirelessly transmitted to a receiver. In this way, the bore diameter can be continuously and quantitatively controlled during the machining process, and wear or fracturing of the tool, for example, can be detected. In the event thereof, the corresponding chip removal operation can be momentarily stopped and the tool adjusted or, for example, the indexable insert changed. The inventive drilling system enables production quality to be guaranteed and the production of rejects to be avoided. In practice, the actual drilling tool can be used in various forms, for example as a boring bar, a boring head, a precision boring head or a reamer.

Description

Drilling system with electronic Durchmesserüberwαchung

The invention relates to a special drilling system with electronic Durchmesserüberwαchung for metal-cutting production of holes, for example in metal.

Generally, the cutting production of bores one of the common machining operations on workpieces. The bore itself can be described by the diameter and the length, diameter tolerance and the roughness of the surface. The procedure for the production of holes with higher accuracy or larger diameters usually consists in initially to apply a centering, predrilling and thereafter to drill in connection to the final dimension. This, however, tighter tolerances and smooth surfaces are not readily achievable. In appropriate cases, the required bore is thus for example either reshot with a boring bar or by means of a reamer nachge flat, or be spindled with a special tool, for example in the form of a drill head. When lathing on a CNC lathe, the bore diameter can be adjusted by entering a value for the tool correction. This has an impact on the carriage position in the x-axis relative to the workpiece. For solid reamers the diameter generated by the reamer is dependent and can not be practically unaffected. In case of adjustable reamers or Bohrkδpfen erzeubare the diameter of which is adjustable by an adjusting element, for example, mono- or with scale is adjusted. In general, a preset tool by means of a Zerspanungsversuchs is then checked by the generated is compared with the set diameter. This operation is repeated is until the hole produced for example in the middle of the predetermined tolerance range. After that, this hole can be produced as standard. In general, a mass production can then nowadays eg run automatically on CNC machines more or less, and usually does not cause major problems as long as the processing parameters optimally selected and the tool in perfect condition. However, it is required, the finished workpiece with respect to the hole quality (eg Passf oleranz, Zylindrizitäf, concentricity) to check afterwards, for example by re-measuring of each individual piece or by sampling.

It is known that such a manufacturing process in the form of a constantly repeating cycle can not proceed without controlling and corrective action. As a rule, namely, for example, a slowly progressing wear and tear occurs on the cutting edge of the tool, to an indexable insert, on which results in a gradual decrease of the bore diameter. After a longer service life of the tool edge must also be reckoned with outbreaks or even the complete break away. As a result, then the workpieces are obtained which no longer lie within the tolerance limit, or have extremely poor surfaces. In a number of materials, the difficulty that a few micrometers constituting Direction removal eg by re-overturning or underreaming is not feasible there. It is then either produces only a surface hardening with virtually no mass change or an abruptly occurring undercut. When these pieces are not enabling, they must be discarded as scrap. This is particularly troublesome if these circumstances are added only in time can be detected, because it can then have been already produced a number of rejects is.

In any case, according to the prior art, the dimensional control and creation of a test only after the complete machining of the workpiece on a separate test station is possible. To avoid production of waste, the production must be interrupted and remain dormant. If unacceptable, but reworkable tolerance deviations are found, the defective workpiece must be returned to the Fertigυngsprozess and reworked, which further increases the total production costs.

It was therefore the task to create a system for cutting the production of holes, which should address the problems described above and avoid the production of rejects without additional expenditure of time.

The above object is achieved according to the invention by provision of a special drilling system, which performs the monitoring of the hole quality with respect to the diameter of the cylindricity and the concentricity directly in the process, so that the manufacturing subsequent Quaitätskontrolle omitted in principle, or respectively to the monitoring can limit. calibration of the drilling tool own measuring system.

According to the invention, the actual drilling tool in its respective embodiments, for example as a drill rod, drill bit, fine boring head, Reilahle or the like, equipped with an analog inductive distance sensor, which is oriented in principle to a radial direction of detection, that is in this respect orthogonal to the bore wall, preferably with rotated 180 ° to the cutting edge. With this sensor, the relative distance of his own reference surface, for example, its end face is continuously determined from the bore wall at a high sample rate during the machining process, wherein a rotative relative movement between the drilling tool and the bore is made. It is immaterial whether the workpiece rests and rotates the drill bit rotates the workpiece and is established as the drilling tool itself, or- both drilling tool and the workpiece rotate.

The values ​​determined by the distance sensor are detected with a Electronics, processed and wirelessly emitted via a transmit window. a correspondingly small replaceable button cell is provided for the power supply of both components. The entire unit is being protected in the interior of the drill housed. The required electronics are miniaturized such as an integrated circuit that they can be easily integrated into the smallest sizes.

The inventive system further comprises a spatially separate from the boring tool receiving module, which is responsible for the communication with the electronics in the drilling tool. This reception module is preferably connected to a computer (personal computer). A comfortable software program for operating the system is stored in the computer.

the computer is first turned on to operate the system and the software activated. The pre-drilling tool is then calibrated, for example by means of a sample section. In this case (for example, automatically using a speed detection) enabled to achieve the relative speed between the workpiece and the drill head, the measuring operation and the measured distance by the system with the subsequently controlled bore diameter matched. The handling of the system from the computer in the dialog according to the used software, wherein the measuring duration, measuring frequency, and the manner is controllable the analysis, display and recording of the measured values ​​of corresponding commands. On a screen of the desired current data can be represented, for example, diameter, concentricity or cylindricity tolerance field with deviation, trend analysis or the like. An alarm circuit in the event of an abrupt change in mass eg with a broken tool is present. All data is automatically saved under the date and run number with the part description, etc., and can always be printed, retrieved or transmitted as a test or quality protocol.

The invention will be explained in more detail below with respect to the drilling tool with reference to the single drawing figure. Fig. L shows an embodiment of a drill head according to the invention in a slightly enlarged Abbildungsmasstab, wherein has been resorted to a partially sectioned representation. The drill head 2 has a standard steep taper 1 with a gripper groove 3 for connection to the spindle of a drilling or milling machine. To the shaft 4, a housing 5 is connected, which accommodates the other components of the tool-side system. At the drill head, a single blade is realized by means of an indexable cutting insert 7, which is fixed with the aid of a cartridge 6 on the housing. 5 In the head region of the housing, an insert 8 is housed. This serves to accommodate a distance sensor 9. Preferably, the distance sensor in handling direction of the housing against the cutting edge by 180 degrees is arranged rotated. It is positioned so that its active for the distance measurement end face facing orthogonal with a small air gap of the hole surface generated. In the axial direction of the sensor relative to the tool cutting edge is set back just far enough that its measuring signal is not affected by the not yet reworked inner surface of the bore. The sensor is connected by a cable 10 with an electronic module 1. 1 This is responsible for the control of the sensor, sampling, amplification, purification, possibly filtering, and wireless radiation of the desired measurement data. For the emission of transmission signals a sealed transmission window 12 is provided, for example made of plastic. The required power supply for the sensor and the electronic module is done expedient means of a removable button battery which is not shown in the drawing for simplicity.

The entire system is still completed by a so-called Funkmdodul which communicates wirelessly with the electronics module of the boring tool and in turn with an appropriate terminal (such as notebook, laptop, personal computer) is connected. In principle, the use and handling of such terminals, including keyboard, mouse, monitor and required software is generally known, so that should not be discussed further at this point.

Claims

Drilling system with electronic DυrchmesserüberwαchungPatentansprüche
01. A method for the production and rework of wells under electronic control of the diameter generated, characterized in that detected during the cutting process with at least one incorporated into the boring tool sensor of the distance between a reference point of the drilling tool and the inner wall surface of the bore immediately after its preparation without contact, radiated the distance values ​​detected by means of a boring tool which is also located in the electronic circuit wirelessly received wirelessly with a remote electronic module and the received distance values ​​of an evaluation will be made available.
02. A process according to claim 1, characterized in that the spatially remote module communicates with a computer (eg, a notebook, laptop, personal computer) in combination.
03. A process according to claim 2, characterized in that the computer means of the module communicates wirelessly connected to the electronic circuit in the drilling tool at least in one direction.
04. A process according to any one of claims 2 or 3, characterized in that the computer with a keyboard, optionally additionally using a mouse, a screen, and, optionally, completed with a printer or plotter.
05. A process according to any one of claims 2 to 4, characterized in that the computer works with a special software that a suitable control of the system via the keyboard or mouse, and optionally the reception of the distance values ​​and their processing and storage, presentation enables redirection of data.
06. A process according to one or more of the preceding claims, characterized in that for the purpose of matching a detected with the sensor relative distance is set to the actual diameter of the bore of the relative distance to a Probezerspanung with subsequent measurement of the diameter to the actual value of the drilling radius and used thereby is maintained offset value.
07. Method according to one or more of the preceding claims, characterized in that a trend analysis of the bore diameter is carried out and displayed.
08. A process according to one or more of the preceding claims, characterized in that in case of exceeding or falling below a presettable tolerance range, or an abrupt change of the finished bore diameter, an alarm signal (for example, optical or acoustic warning) will be triggered.
09. A process according to one or more of the preceding claims, characterized in DGSS the roundness of the hole generated is determined from the measured distance values ​​and their moderate angle position.
10. A process according to one or more of the preceding claims, characterized in dαss the cylindricity of the hole generated is determined from the course of the measured distance values.
1 1. A drilling system for carrying out the method according to one or more of claims 1 to 10 with a drilling tool such as a drill rod or a housing 5, which by means of a suitable interface, such as a steep taper 1, directly or indirectly to a fixed or rotatable tool coupling can be connected and has at least one cutting edge, for example, to a replaceable indexable cutting insert 7, characterized in that is integrated in the drilling tool both radially aligned distance sensor 9, wherein the non-contact measurement of the distance of an associated the drilling tool reference point to the inner surface of the bore during machining of the bore permitted, as well as an electronic circuit 1 1, which is used to record and wireless radiation measured by the distance sensor distance values, and the system is supplemented by a spatially remote electronic module, which at least in one direction wirelessly can communicate with the drilling tool in the electronic circuit.
1 2. The drilling system according to claim 1 1, characterized in that the spatially remote electronic module to a computer (for example a notebook, laptop, personal computer) is connected.
13. The drilling system according to one of claims 1 1 or 12, characterized in that the sensor and the electronic circuit of the drilling tool equipped with an autonomous power supply, for example, via an inserted removable button cell.
14. The drilling system according to one of claims 1 1 to 13, characterized in that the wireless radiation and the reception of measurement data and command signals through a penetrable window for the radiated waves is carried out, for example, of plastic.
15. The drilling system according to one of claims 1 1 to 14, characterized in that the wireless communication between the electronic circuit in the drilling tool and the spatially remote electronic module an arbitrary radio frequency is used.
16. Bohrsy.stem according to one of claims 1 1 to 14, characterized in that the wireless communication between the electronic circuit in the drilling tool and the spatially remote electronic module, an infrared frequency is used.
1 7. The drilling system according to one or more of claims 1 1 to 16, characterized in that the drilling tool has a standardized tool interface, such as a VDI, Capto, Hohlsteilkegel-, steep taper, taper coupling or a straight shank (optionally with surfaces ), which allows the connector on a stationary or rotating receptacle.
18. The drilling system according to one or more of claims 7, characterized in 1 1 to 1, that is the active head of the distance sensor relative to the cutting edge in the axial direction by an amount set back, which is sufficient to provide a Removing final distance detection for each currently processed ensure bore wall and thereby preclude any influence on the measured distance signal from the only pre-machined bore wall.
19. The drilling system according to one or more of claims 1 to 18 is positioned 1, characterized in that the distance sensor to the cutting edge of the drill in the circumferential direction angularly twisted by 180 °.
20. The drilling system according to one or more of claims 1 1 to 19, characterized gekennzeichnet- that the cutting edge is radially finely adjustable.
21st A drilling system according to one or more of claims 1 1 to 20, characterized in that the cutting edge is implemented by means of an indexable insert.
PCT/EP2001/009986 2000-09-19 2001-08-30 Drilling system comprising electronic diameter monitoring system WO2002024405A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2000146529 DE10046529A1 (en) 2000-09-19 2000-09-19 Drilling system with electronic diameter monitoring
DE10046529.3 2000-09-19

Publications (1)

Publication Number Publication Date
WO2002024405A1 true true WO2002024405A1 (en) 2002-03-28

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ID=7656920

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Application Number Title Priority Date Filing Date
PCT/EP2001/009986 WO2002024405A1 (en) 2000-09-19 2001-08-30 Drilling system comprising electronic diameter monitoring system

Country Status (2)

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DE (1) DE10046529A1 (en)
WO (1) WO2002024405A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012154319A3 (en) * 2011-05-09 2013-05-02 The Boeing Company Drilling machine having hole measurement capability
CN103547411A (en) * 2011-05-19 2014-01-29 株式会社牧野铣床制作所 Machine tool having workpiece measuring function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009031166A1 (en) * 2009-03-17 2010-09-30 Heinz Adams Forming machine tool has integrated devices for optical monitoring and control, acoustic monitoring and control and monitoring and control of vibrations

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DE3109962A1 (en) * 1981-03-14 1982-07-22 Daimler Benz Ag Honing machine
US5065035A (en) * 1981-04-30 1991-11-12 Gte Valenite Corporation Optical data system having flash/receiver head for energizing/receiving information from a battery operated transmitter
EP0239161A2 (en) * 1986-03-20 1987-09-30 POMINI FARREL S.p.A. Grinding machine for cylinders having members for dimensional and superficial survey and control
US4872269A (en) * 1988-04-08 1989-10-10 Karl Sattmann Automatic cylinder profiling gage
JPH0332554A (en) * 1989-06-29 1991-02-13 Komatsu Ltd Automatic compensator for in-process tool
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EP0872787A1 (en) * 1997-04-14 1998-10-21 Renishaw plc Programmable probe system
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012154319A3 (en) * 2011-05-09 2013-05-02 The Boeing Company Drilling machine having hole measurement capability
US9199351B2 (en) 2011-05-09 2015-12-01 The Boeing Company Drilling machine having hole measurement capability
CN103547411A (en) * 2011-05-19 2014-01-29 株式会社牧野铣床制作所 Machine tool having workpiece measuring function
EP2711127A1 (en) * 2011-05-19 2014-03-26 Makino Milling Machine Co., Ltd. Machine tool having workpiece measuring function
EP2711127A4 (en) * 2011-05-19 2014-12-24 Makino Milling Machine Machine tool having workpiece measuring function
US9333607B2 (en) 2011-05-19 2016-05-10 Makino Milling Machine Co., Ltd. Machine tool having workpiece measurement function

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