EP0247558A2 - Flachrundschleifen - Google Patents

Flachrundschleifen Download PDF

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Publication number
EP0247558A2
EP0247558A2 EP87107572A EP87107572A EP0247558A2 EP 0247558 A2 EP0247558 A2 EP 0247558A2 EP 87107572 A EP87107572 A EP 87107572A EP 87107572 A EP87107572 A EP 87107572A EP 0247558 A2 EP0247558 A2 EP 0247558A2
Authority
EP
European Patent Office
Prior art keywords
grinding stone
flat
flat grinding
machined
body part
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.)
Withdrawn
Application number
EP87107572A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0247558A3 (de
Inventor
Kurt Dr.-Ing. Honrath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0247558A2 publication Critical patent/EP0247558A2/de
Publication of EP0247558A3 publication Critical patent/EP0247558A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/04—Honing machines or devices; Accessories therefor designed for working external surfaces of revolution
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device for precision grinding of shaft parts is known, the shaft to be machined being rotatably guided in a holding device and a tool holder with grinding tools attached thereon for grinding allowance being movable radially to the shaft.
  • a disadvantage of such a grinding device is that in order to change the grinding quality, which is determined by the grit values of the grinding stones, the complete tool holder with the grinding stones must be replaced. Accordingly, the machine tool must be shut down several times during a complete grinding operation of a shaft in order to be able to process the shaft with grinding stones of different grinding qualities.
  • the object of the invention is to provide a device with which it is possible to change the grinding tool during a continuous machining process.
  • the flat grinding stone is composed of successive segments.
  • the successive segments advantageously have different grain sizes.
  • the machining quality of the rotary body part to be machined can be changed during a single machining operation without stopping the grinding machine for a tool change.
  • the different grain values of the individual segments of a flat grinding stone follow one another in a sorted manner. This means that a segment with the coarsest grain value to be used is arranged as the first end segment on the tool holder, and then the grain values of the following segments are always refined to a finest grain value, this segment being used as the second end segment.
  • the flat grinding stone composed of segments is wedge-shaped.
  • the segment with the coarsest grain with its end facing away from the next finer segment has the pointed end of the wedge, while the segment opposite on the tool carrier with the finest grain values forms the blunt end of the wedge at the end.
  • Claim 8 shows an advantageous method with regard to a grinding process for a device according to one of the preceding claims.
  • the flat grinding stone composed of segments is guided tangentially past the rotary body part to be machined, starting from a first end position of the flat grinding stone, such that the machining process of the rotating body part is completed when the second end position of the flat grinding stone is reached. It does not matter whether the machining process has the aim of grinding the rotary body part to be machined to a predetermined size, to achieve a predetermined grinding quality of the rotary body part or whether both objectives are to be achieved. In the case of special grinding operations, however, it also makes sense to have several processing operations in succession.
  • the speed of rotation of the rotary body part to be machined is increased, in particular when the grain values of the successive segments of the flat grinding stone become finer. This further improves the grinding quality of the rotating body part.
  • coolant to the grinding point at least during a period of the grinding process. This is advantageously carried out via a feed device which is permanently installed on the grinding machine and is fed with cooling liquid either manually or under program control.
  • the rotary body part 1 a to be machined is the base bearing of a crankshaft 1 in the exemplary embodiments.
  • the crankshaft 1 is in base bearing shaft parts 1 b and 1 c adjacent to the shaft part 1 a in bearings 2 b and not shown in more detail 2 c rotatably mounted.
  • the bearings 2 b, 2 c are in turn attached to the grinding machine.
  • a gear 3 is attached on the free base shaft part 1 c of the crankshaft 1.
  • the crankshaft 1 is controlled by a motor integrated in the grinding machine.
  • the flat grindstone segments 5 to 8 have different grain sizes.
  • the segment 5 has the coarsest grit, the flat grindstone segments 6 and 7 are gradually finer in their grit and the flat grindstone segment 8 has the finest grit.
  • the individual segments 5 to 8 all have identical dimensions when new.
  • End pieces 9 and 10 of the tool holder 4 at the front fix the segments 5 to 8 on the one hand, and on the other hand they are provided with devices which make it possible to adjust the angle of attack of the tool holder 4 to the tangential direction of movement a of the tool holder 4.
  • the tool holder 4 in its transverse axis 11, which in the front end piece 10 is rotatably mounted.
  • a thread 12 is incorporated, into which a spindle 13 is screwed.
  • the spindle 13 can be rotated remotely from the control panel of the grinding machine by means not shown. With this device it is possible to set a setting angle of the tool holder 4 to the direction of movement a fixed or variable during the tangential movement process.
  • the tool carrier 4 consists of a base plate 14, two side walls 15 and 16 and the front end pieces 9 and 10 shown in FIG. 1. With these fastening parts, the individual segments 5 to 8 are clamped onto the base plate 14. The side walls 15 and 16 and the end pieces 9 and 10 are detachably connected to the base plate 14, for example via screw connections.
  • threaded bushings 17 and 18 are each embedded in the bottom side of the segments in the segments 5 to 8.
  • the segments 5 to 8 are additionally screwed to the base plate 14 through corresponding openings in the base plate 14, which are aligned with the threaded bushings 17 and 18.
  • the width of the segments 5 to 8 is dimensioned such that the base bearing shaft part 1 to be machined is machined without axial movement a when the flat grinding stone is passed over once. Cooling liquid is supplied in its entire width to the grinding point via a nozzle 19.
  • Fig. 4 shows a holding device 20 which additionally carries the crankshaft 1 in the base bearing shaft part 1 a to be machined.
  • the holding device 20 consists of a bracket 21 which can be divided for assembly and disassembly purposes and which comprises the shaft part 1 a to about 3/4.
  • the bracket 21 is aligned with the tool holder 4 or with the flat grindstone segments arranged on the tool holder 4 in such a way that they can be guided past the grinding point unhindered.
  • the bracket 21 has for storing the shaft part 1 a rollers 22, 23 and 24.
  • the rollers 22 and 23 are not adjustably attached to the bracket 21, while the roller 24 can be lowered or raised to the outer diameter of the shaft to be machined via an adjusting device 25.
  • the holding device 20 is used when there is a risk during the grinding of a shaft that the shaft part to be machined can be bent by centrifugal or other forces.
  • the holding device 20 can also be used for sole guidance for the shaft to be machined.
  • the roller 24 can be driven, for example, by means of suitable devices, so that the shaft 24 to be machined is rotated by this roller 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP87107572A 1986-05-26 1987-05-25 Flachrundschleifen Withdrawn EP0247558A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863617700 DE3617700A1 (de) 1986-05-26 1986-05-26 Flachrundschleifen
DE3617700 1986-05-26

Publications (2)

Publication Number Publication Date
EP0247558A2 true EP0247558A2 (de) 1987-12-02
EP0247558A3 EP0247558A3 (de) 1990-03-21

Family

ID=6301674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107572A Withdrawn EP0247558A3 (de) 1986-05-26 1987-05-25 Flachrundschleifen

Country Status (2)

Country Link
EP (1) EP0247558A3 (it)
DE (1) DE3617700A1 (it)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496352A (en) * 1945-04-02 1950-02-07 Super Cut Abrasive wheel
DE885527C (de) * 1943-09-23 1953-08-06 Daimler Benz Ag Vorrichtung zum Feinziehschleifen von Werkstuecken mit in axialer Richtung stellenweise unterbrochener zylindrischer Oberflaeche, insbesondere der Grundlagerzapfen von Kurbelwellen und der Lagerstellen von Nockenwellen
DE1158864B (de) * 1955-01-03 1963-12-05 Daimler Benz Ag Vorrichtung zum Feinziehschleifen von Wellen
GB1181782A (en) * 1966-03-11 1970-02-18 Norton Abrasives Ltd Improvements relating to Grinding
JPS5542750A (en) * 1978-09-20 1980-03-26 Noritake Dia Kk Long life tool
JPS61103780A (ja) * 1984-10-25 1986-05-22 Matsushita Electric Works Ltd 砥石

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1324512A (en) * 1919-12-09 Knife-sharp
DE584496C (de) * 1933-09-20 Karl Fickert Dipl Ing Schleifwerkzeug mit Handgriff mit mindestens drei Schleifflaechen verschiedener Koernung
GB1152325A (en) * 1966-05-15 1969-05-14 Hassan Ibrahim Badawi Buffing Bar and Method of Making Same
DD222034B1 (de) * 1984-03-26 1987-07-08 Guben Chemiefaserwerk Verfahren zur herstellung von polyestern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE885527C (de) * 1943-09-23 1953-08-06 Daimler Benz Ag Vorrichtung zum Feinziehschleifen von Werkstuecken mit in axialer Richtung stellenweise unterbrochener zylindrischer Oberflaeche, insbesondere der Grundlagerzapfen von Kurbelwellen und der Lagerstellen von Nockenwellen
US2496352A (en) * 1945-04-02 1950-02-07 Super Cut Abrasive wheel
DE1158864B (de) * 1955-01-03 1963-12-05 Daimler Benz Ag Vorrichtung zum Feinziehschleifen von Wellen
GB1181782A (en) * 1966-03-11 1970-02-18 Norton Abrasives Ltd Improvements relating to Grinding
JPS5542750A (en) * 1978-09-20 1980-03-26 Noritake Dia Kk Long life tool
JPS61103780A (ja) * 1984-10-25 1986-05-22 Matsushita Electric Works Ltd 砥石

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 286 (M-521)[2342], 27. September 1986; & JP-A-61 103 780 (MATSUSHITA ELECTRIC WORKS LTD) 22-05-1986 *
PATENT ABSTRACTS OF JAPAN, Band 4, Nr. 84 (M-16)[566], 17. Juni 1980, Seite 38 M 16; & JP-A-55 42 750 (NORITAKE DAIYA K.K.) 26-03-1980 *

Also Published As

Publication number Publication date
DE3617700A1 (de) 1987-12-03
EP0247558A3 (de) 1990-03-21

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Inventor name: HONRATH, KURT, DR.-ING.