US20120238184A1 - Method for providing an edge preparation on a cutting edge of a tool and a control and a processing machine for carrying out the method - Google Patents
Method for providing an edge preparation on a cutting edge of a tool and a control and a processing machine for carrying out the method Download PDFInfo
- Publication number
- US20120238184A1 US20120238184A1 US13/399,202 US201213399202A US2012238184A1 US 20120238184 A1 US20120238184 A1 US 20120238184A1 US 201213399202 A US201213399202 A US 201213399202A US 2012238184 A1 US2012238184 A1 US 2012238184A1
- Authority
- US
- United States
- Prior art keywords
- edge
- tool
- processing machine
- preparation
- cutting edge
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
- G05B19/4163—Adaptive control of feed or cutting velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/005—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents using brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/16—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of broaches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37602—Material removal rate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Machine Tool Sensing Apparatuses (AREA)
- Automatic Control Of Machine Tools (AREA)
Abstract
A method for providing an edge preparation on a cutting edge of a tool by means of an edge processing operation includes clamping the tool in a processing machine for providing the edge preparation, recording as a reference value the position of the cutting edge to be processed by means of a sensor arranged on the processing machine, carrying out an edge processing operation by means of a preparation tool, recording the position of the cutting edge again by means of the sensor arranged on the processing machine and storing the position as an actual value, monitoring the edge processing operation on the basis of a comparison between the reference value and the actual value, and comparing the actual value with a desired value for material removed on the cutting edge.
Description
- 1. Field of the Invention
- The invention relates to a method for providing a defined edge preparation on a cutting edge of a tool for machining metals by means of a rounding operation, in particular for providing a defined edge preparation on a drilling, reaming, threading and/or milling tool. The invention also relates to a control and to a processing machine for carrying out the method.
- 2. Background Information
- Both drilling and milling tools are produced, inter alia, in a plurality of production steps from a rough round bar. In this case, modern high performance tools are produced from solid carbide. In the process, the desired geometry with main cutting edges is normally formed at the end face by a special point grinding method. In continuation of the tool, flutes with secondary cutting edges are often provided. The selection of the special point grinding, the configuration of the cutting edge geometry and of the flutes depend on the respective requirements. The cutting properties of the tool are considerably influenced by the cutting edge geometry. After the grinding operation, the cutting edges are normally of very sharp design, and so the cutting edges are regularly rounded via “edge rounding”. This edge rounding, referred to below as rounding operation, is carried out using a suitable rounding tool, in particular by means of brushes. A high-precision rounding process is important here in order to achieve the desired cutting properties. The material removal is normally only within a range of a few um. A deviation from desired material removal leads to a deterioration in the cutting properties.
- On account of the very hard material when using solid carbide drills, the brushes are subjected to high wear during the rounding operation, such that, during the processing of a multiplicity of tools, the result of the rounding operation often varies in an undesirable manner at the same machine settings.
- A further conventional edge preparation in addition to such edge rounding is the provision of a bevel on a cutting edge. Here, too, reproducible high precision of the edge preparation is important.
- Accordingly, a need exists for a simple, reliable method for producing a defined edge preparation, in particular during a multiplicity of successive edge processing operations, and for a processing machine for carrying out this method.
- The present invention addresses such needs by providing a method for providing an edge preparation on a cutting edge of a tool by means of an edge processing operation, in particular for providing edge rounding or a bevel. Accordingly, for providing a defined edge preparation on a cutting edge of a tool, in particular a drilling, reaming, threading and/or milling tool, the tool is first of all clamped in place in a processing machine. The position of the cutting edge to be processed is then recorded by means of a sensor arranged on the processing machine and is stored as a reference value. In the next method step, the edge preparation operation is carried out by means of a preparation tool and the position, which has then changed, of the cutting edge is then recorded again by means of the sensor and stored as an actual value. Finally, the edge preparation operation is monitored on the basis of a comparison between the reference value and the actual value and is compared with a desired value for the material removal on the cutting edge. As a result, the edge preparation is controlled overall in a simple and efficient manner.
- In previous methods, it was regularly necessary for this purpose to check the result of the edge preparation in a complicated manner in separate measuring devices. To this end, unclamping of the tool was necessary.
- With the method now described herein, it is now possible to determine the result of the edge processing operation directly at the machine tool, and therefore no separate measuring operation in a separate measuring device has to be carried out. The recording of the relative change between the recorded reference value and the actual value recorded after the edge processing operation is especially important. It is therefore not important to determine the actual absolute situation and position of the cutting edge in the coordinate system of the processing machine. As a result of the recording of the relative change, the material removal actually effected can be determined in a highly precise manner.
- In this way, in particular online process monitoring is made possible and provided by the simple measuring operation. Normally, a multiplicity of tools are processed one after the other on the processing machine and are subjected to the edge processing operation. The expression “online process monitoring” refers to the fact that, in the course of this process, that is to say the edge preparation of a multiplicity of tools, the result of a respective edge processing operation is regularly monitored. The expression “regularly” refers here to the fact that the edge processing operation itself is monitored by the described comparison in each case after a defined number of edge processing operations, for example after 3 to 5 rounding operations (tools). In principle, it is also possible, and provision is also made for this, to carry out the measurement and monitoring and also to log the data at each tool to be processed.
- The edge preparation provided is in particular a rounding operation. Alternatively, a bevel is provided using this method. The invention is explained in more detail below with reference to the rounding operation. The advantages and method features cited also likewise apply to the provision of a bevel.
- According to an expedient configuration, wear of the preparation tool, designated below as a rounding tool, is deduced on the basis of the progression of the difference between actual value and reference value. Online monitoring of the wear of the rounding tool is therefore also made possible by this measuring method. When wear which exceeds an admissible tolerance value is detected, provision is accordingly also made for a desired control value for the rounding tool to be corrected in a control unit of the machine tool. The wear is therefore taken into account for the infeed movement of the rounding tool in order to ensure the desired result, that is to say the desired material removal, for subsequent rounding operations.
- In an expedient configuration, the preparation tool is in this case a brush and furthermore provision is made in particular for the sensor to be a probe. Such probes are present in modern processing machines, and therefore no additional measuring devices have to be attached to a conventional processing machine.
- As an alternative to the brush, other preparation tools or preparation methods can also be provided, such as, for example, a grinding tool or a blasting method, in which the edge to be processed is processed in a wet blasting process, with abrasive particles if required.
- The processing machine is preferably a multi-axis, for example 5- or 6-axis, CNC machine. Such machines are distinguished by universal use for the most varied tool processing operations. In particular, such machines are also used as universal machines for the further production processes, such as, for example, grinding, etc. It is therefore also possible to carry out a plurality of production steps, in particular all the production steps, such as the flute grinding or the end point grinding for producing the tool, without resetting the tool on the processing machine.
- In a preferred development, in the event of an inadmissible deviation from the desired value being detected on account of wear of the rounding tool, a rounding operation is carried out again before the tool is unclamped. However, this is expediently avoided by a timely correction of the desired control value for the rounding tool.
- The present invention further addresses such needs by providing a processing machine for carrying out the methods described herein. The machine includes a clamping unit for clamping the tool in place, a preparation tool for carrying out the edge processing operation, a sensor for recording the position of the cutting edge, and a control unit structured to monitor the edge processing operation on the basis of a comparison between the reference value and the actual value.
- An exemplary embodiment of the invention is explained in more detail below with reference to the drawings, in which:
-
FIG. 1 shows a greatly simplified illustration of a processing machine for carrying out edge rounding on a tool; and -
FIG. 2 shows a greatly simplified schematic illustration of a cutting edge before and after the edge rounding. - Equivalent parts are provided with the same reference numerals in the figures.
- According to
FIG. 1 , aprocessing machine 2 has a clamping unit 4 which is designed for clamping atool 6 in place. Theprocessing machine 2 is shown in its entirety inFIG. 1 by the dot-dash line. Furthermore, theprocessing machine 2 comprises atool unit 8 for the defined guidance of a tool, in particular a rounding tool, which in the exemplary embodiment is designed as abrush 10. Finally, theprocessing machine 2 comprises acontrol unit 12 which controls the individual processes of theprocessing machine 2. A sensor designed in particular as aprobe 14 is arranged on thetool unit 8. The individual components of theprocessing machine 2, which in particular is designed as a CNC machine tool, are adjustable in a controlled manner along various axes, as indicated by the arrows. In addition to linear adjustments in the direction of axes, rotary adjustments about axes of rotation are also possible. The individual adjusting movements can be superimposed in a suitable manner if required. - To carry out the actual rounding operation, first of all, in a first step, the
probe 14 is brought up to a cutting edge 16 (shown in solid lines inFIG. 2 ), in particular a main cutting edge of thetool 6. In this initial state, thecutting edge 16, as shown, is still of extremely sharp design. As soon as theprobe 14 touches the tip of thecutting edge 16, this position is established as a reference position. The corresponding measured values define reference values of the reference position. - The reference position is expediently recorded at an appropriate point on the main cutting edge or also on a secondary cutting edge of the
tool 6. The position is preferably merely recorded at one point, since the rounding operation over the cutting edge length leads within sufficient tolerances to identical material removal d. - The
probe 14 is then retracted again and thebrush 10 for carrying out the rounding operation is advanced to thetool 6 in a manner known per se. A desired control value, up to which thebrush 10 is advanced to thetool 6, is stored in thecontrol unit 12. - After the rounding process is carried out, which is carried out according to a process sequence stored in the
control unit 12, theprobe 14 is again brought up to the then rounded cutting edge 16 (shown in dashed line inFIG. 2 ). The (rounded) position, then recorded by theprobe 14, is evaluated as an actual position and the associated actual value is compared with the reference value recorded beforehand. The difference between the actual value and the reference value in this case determines the material removal d effected during the rounding operation. If material removal d is within a desired range, that is to say corresponding to a desired value with predetermined tolerances of, for example, ±5%, the rounding operation is all right. In a preferred configuration, if the material removal d effected is too little, a rounding operation is carried out once again by advancing thebrush 10 again. - Preferably provided within the
control unit 12 is a comparison module which continuously compares the recorded reference and actual values with one another and deduces the wear of thebrush 10 on the basis of the progression of the difference between the reference values and actual values (during successive rounding operations on various tools 6). If the wear exceeds a predetermined tolerance value, the desired control value stored in the control unit is accordingly corrected. During the next rounding process, thebrush 10 is then brought up to the tool in accordance with the new desired control value. As a result of this measure, online process monitoring is made possible and provided overall in a continuous manner during the rounding operation. - Instead of carrying out the rounding operation by means of a
brush 10, other rounding tools, such as, for example, blasting methods, etc., can also be used. The rounding operation itself, with the online process monitoring described, can be carried out on aspecial processing machine 2 provided only for the rounding. - Further measures, such as, for example, coating measures, etc., can also be carried out if required.
- The method described here and the
processing machine 2 with the control algorithm stored in thecontrol unit 12 in accordance with the method are distinguished by reliable edge rounding and online monitoring of the same during a multiplicity of successive edge rounding operations without the need for a separate external measuring operation for recording the result of the respective edge rounding operation.
Claims (9)
1. A method for providing an edge preparation on a cutting edge of a tool by means of an edge processing operation, the method comprising:
clamping the tool in a processing machine for providing the edge preparation;
recording as a reference value the position of the cutting edge to be processed by means of a sensor arranged on the processing machine;
carrying out an edge processing operation by means of a preparation tool;
recording the position of the cutting edge again by means of the sensor arranged on the processing machine and storing the position as an actual value;
monitoring the edge processing operation on the basis of a comparison between the reference value and the actual value; and
comparing the actual value with a desired value for material removed on the cutting edge.
2. The method of claim 1 , wherein a plurality of tools are successively processed on the processing machine and wherein wear of the preparation tool is deduced on the basis of the progression of the difference between actual value and reference value.
3. The method of claim 2 , wherein when wear of the preparation tool is detected, a desired control value for the preparation tool is corrected in a control unit of the processing machine.
4. The method of claim 1 , wherein desired value for the material removal is within the range of 3 μm to 200 μm.
5. The method of claim 1 , wherein the sensor is a probe.
6. The method of claim 1 , wherein the preparation tool comprises a brush.
7. The method of claim 1 , wherein the processing machine comprises a 5-axis CNC machine.
8. The method of claim 1 , wherein an edge preparation is carried out again in the event of an inadmissible deviation from the desired value.
9. A processing machine for carrying out the method of claim 1 , the processing machine comprising:
a clamping unit for clamping the tool in place;
a preparation tool for carrying out the edge processing operation;
a sensor for recording the position of the cutting edge; and
a control unit structured to monitor the edge processing operation on the basis of a comparison between the reference value and the actual value.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011011754.7-14 | 2011-02-18 | ||
DE102011011754A DE102011011754A1 (en) | 2011-02-18 | 2011-02-18 | Method for applying an edge preparation to a cutting edge of a tool and control and processing machine for carrying out the method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120238184A1 true US20120238184A1 (en) | 2012-09-20 |
Family
ID=46604901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/399,202 Abandoned US20120238184A1 (en) | 2011-02-18 | 2012-02-17 | Method for providing an edge preparation on a cutting edge of a tool and a control and a processing machine for carrying out the method |
Country Status (3)
Country | Link |
---|---|
US (1) | US20120238184A1 (en) |
CN (1) | CN102642158B (en) |
DE (1) | DE102011011754A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2510965A (en) * | 2012-12-21 | 2014-08-20 | Hexcel Composites Sarl | Method of producing a shaped component |
CN114113319A (en) * | 2021-11-12 | 2022-03-01 | 昆山市镁富康精密自动化设备有限公司 | Nondestructive testing device and method for hob holder for numerical control machining |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114932386B (en) * | 2022-04-24 | 2023-12-22 | 维克多精密工业技术(苏州)有限责任公司 | High-yield cutter preparation process |
Citations (22)
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US4382215A (en) * | 1981-07-16 | 1983-05-03 | General Electric Company | System and method of precision machining |
US4620281A (en) * | 1981-09-22 | 1986-10-28 | General Electric Company | In-process cutting tool condition compensation and part inspection |
US4967365A (en) * | 1987-12-12 | 1990-10-30 | SKODA koncern Plyzen Prvni brnenska strojirna koncernoy podnik | Method and apparatus for adaptive control of the trajectory of a working process |
US4974165A (en) * | 1988-11-28 | 1990-11-27 | Mechanical Technology Incorporated | Real time machining control system including in-process part measuring and inspection |
US5241792A (en) * | 1991-02-08 | 1993-09-07 | Yamaha Hatsudoki Kabushiki Kaisha | Method and apparatus for surface finishing |
US5309646A (en) * | 1991-12-02 | 1994-05-10 | General Electric Company | Tool point compensation for hardware displacement and inclination |
DE4312199A1 (en) * | 1993-04-14 | 1994-10-20 | Reinecker Masch Kg J E | Method for grinding the tooth cutting edges of a milling cutter |
US5387061A (en) * | 1990-12-14 | 1995-02-07 | The United States Of America As Represented By The United States Department Of Energy | Parameter monitoring compensation system and method |
US5490307A (en) * | 1991-10-19 | 1996-02-13 | Index-Werke Gmbh & Co. Kg Hahn & Tessky | Lathe |
US5919081A (en) * | 1996-09-04 | 1999-07-06 | Unova Ip Corporation | Method and apparatus for computer numerically controlled pin grinder gauge |
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US20090209180A1 (en) * | 2008-01-17 | 2009-08-20 | Peter Lenard | Device for machining, in particular eroding and grinding, rotational work-pieces provided with cutting edges |
US20100188035A1 (en) * | 2009-01-29 | 2010-07-29 | Jtekt Corporation | Machine tool and controlling method thereof |
US20100204814A1 (en) * | 2009-02-09 | 2010-08-12 | Deckel Maho Pfronten Gmbh | Process and apparatus for generating control data for controlling a tool on a machine tool comprising at least 5 axes |
US20100228384A1 (en) * | 2009-02-09 | 2010-09-09 | Deckel Maho Pfronten Gmbh | Method and device for generating transformed control data for controlling a tool on a machine tool |
Family Cites Families (1)
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CN2850809Y (en) * | 2005-11-18 | 2006-12-27 | 邱博洪 | Borer grinding machine with detector |
-
2011
- 2011-02-18 DE DE102011011754A patent/DE102011011754A1/en not_active Ceased
-
2012
- 2012-02-16 CN CN201210034894.7A patent/CN102642158B/en active Active
- 2012-02-17 US US13/399,202 patent/US20120238184A1/en not_active Abandoned
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US3902811A (en) * | 1973-06-27 | 1975-09-02 | Vsi Corp | Electro-optical scanning system for dimensional gauging of parts |
US4382215A (en) * | 1981-07-16 | 1983-05-03 | General Electric Company | System and method of precision machining |
US4620281A (en) * | 1981-09-22 | 1986-10-28 | General Electric Company | In-process cutting tool condition compensation and part inspection |
US4967365A (en) * | 1987-12-12 | 1990-10-30 | SKODA koncern Plyzen Prvni brnenska strojirna koncernoy podnik | Method and apparatus for adaptive control of the trajectory of a working process |
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US5241792A (en) * | 1991-02-08 | 1993-09-07 | Yamaha Hatsudoki Kabushiki Kaisha | Method and apparatus for surface finishing |
US5490307A (en) * | 1991-10-19 | 1996-02-13 | Index-Werke Gmbh & Co. Kg Hahn & Tessky | Lathe |
US5309646A (en) * | 1991-12-02 | 1994-05-10 | General Electric Company | Tool point compensation for hardware displacement and inclination |
DE4312199A1 (en) * | 1993-04-14 | 1994-10-20 | Reinecker Masch Kg J E | Method for grinding the tooth cutting edges of a milling cutter |
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US20090209180A1 (en) * | 2008-01-17 | 2009-08-20 | Peter Lenard | Device for machining, in particular eroding and grinding, rotational work-pieces provided with cutting edges |
US20100188035A1 (en) * | 2009-01-29 | 2010-07-29 | Jtekt Corporation | Machine tool and controlling method thereof |
US20100204814A1 (en) * | 2009-02-09 | 2010-08-12 | Deckel Maho Pfronten Gmbh | Process and apparatus for generating control data for controlling a tool on a machine tool comprising at least 5 axes |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2510965A (en) * | 2012-12-21 | 2014-08-20 | Hexcel Composites Sarl | Method of producing a shaped component |
CN114113319A (en) * | 2021-11-12 | 2022-03-01 | 昆山市镁富康精密自动化设备有限公司 | Nondestructive testing device and method for hob holder for numerical control machining |
Also Published As
Publication number | Publication date |
---|---|
CN102642158A (en) | 2012-08-22 |
DE102011011754A1 (en) | 2012-08-23 |
CN102642158B (en) | 2016-11-02 |
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