CA2465454C - Working method and device for smoothing gearwheels - Google Patents

Working method and device for smoothing gearwheels Download PDF

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Publication number
CA2465454C
CA2465454C CA002465454A CA2465454A CA2465454C CA 2465454 C CA2465454 C CA 2465454C CA 002465454 A CA002465454 A CA 002465454A CA 2465454 A CA2465454 A CA 2465454A CA 2465454 C CA2465454 C CA 2465454C
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CA
Canada
Prior art keywords
gearwheel
burnished
lubricant
burnishing
smoothing
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.)
Expired - Fee Related
Application number
CA002465454A
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French (fr)
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CA2465454A1 (en
Inventor
Wolfgang Linnenbrink
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Individual
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Individual
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Publication date
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Publication of CA2465454A1 publication Critical patent/CA2465454A1/en
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Publication of CA2465454C publication Critical patent/CA2465454C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • B23Q11/1038Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
    • B23Q11/1046Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using a minimal quantity of lubricant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H5/00Making gear wheels, racks, spline shafts or worms
    • B21H5/02Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
    • B21H5/022Finishing gear teeth with cylindrical outline, e.g. burnishing
    • 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
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Details Of Gearings (AREA)
  • Gear Processing (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Forging (AREA)
  • Friction Gearing (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Soil Working Implements (AREA)
  • Cleaning In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

A working method and a device for smoothing gearwheels is provided which may be operated cost-effectively and in an environmentally friendly way and which allows a simple method sequence and device construction, which is achieved in that the device for performing the working method is equipped with at least one smoothing wheel (5), similar to a gearwheel, that acts radially on a gearwheel (1) to be smoothed and therefore may be engaged and disengaged, and a spray nozzle (2), which generates a fine spray mist, for a lubricant such as oil, and a pressure generator (23), and the spray mist is aprayable in the form of a minimal quantity of lubrication onto the operating region of a gearwheel (1) to be smoothed and/or onto a smoothing wheel (5).

Description

WORKING METHOD AND DEVICE FOR SMOOTHING GEARWHEELS
The present invention relates to a method and a device for smoothing gearwheels.

A gearwheel polishing and honing machine is known from DE 3230860 C2, which has a similar basic construction as the present invention for smoothing gearwheels, the gearwheels to be smoothed and the smoothing wheels used being washed with a large quantity of a coolant-lubricant emulsion in order to reduce the production of frictional heat and remove the abraded material.

The use of such a coolant-lubricant emulsion particularly has the disadvantage that the entire device must be sealed on all sides in order to prevent escape of liquid or sprayed water and the emulsion must be kept in a loop and continuously treated, and the abraded material must be removed and/or filtered out of the emulsion in particular.
This treatment is very complex and the filters used must be disposed of and kept new, which generates very high operating costs, maintenance costs, and unnecessarily great environmental strain overall. Furthermore, the shaft bearings used on the smoothing wheels must be provided with a central lubrication so they are not destroyed over long periods by the coolant and lubricant, which are sometimes aggressive. Even if the gearwheels to be smoothed and the smoothing wheels are only washed with low-viscosity oil, the requirement for treating washing oil is maintained.

The object of the present invention is to provide a working method and a device for smoothing gearwheels, which may be operated significantly more cost-effectively and in a more environmentally friendly way and/or which allow a significantly simpler method sequence and device construction.

Ll/8 - EP04003107.2 - 2 -This object is achieved according to the present invention in connection with the features of the preambles of Claims 1 and 9 in combination with the characterizing features of the claims cited.

Because the device for smoothing gearwheels, which is equipped with at least one smoothing wheel that acts radially on a gearwheel to be smoothed and therefore may be engaged and disengaged, is provided with a spray nozzle, using which a fine lubricant spray mist, particularly made of oil, is sprayable on the gearwheels, it becomes possible to dispense completely with the use of a coolant-lubricant emulsion. In this way, the construction outlay for the device is significantly reduced, since, for example, water-tight boxes which enclose the device must no longer be positioned around the device and central lubrication of the bearings, which may now be replaced by typical permanently-sealed bearings, may be dispensed with completely.
Furthermore, the cleaning of the device is significantly simplified, since it is not always completely wetted by the coolant-lubricant emulsion. Post-processing such as drying of the workpieces is also completely dispensed with.

Further advantageous embodiments of the object of the present invention result from and in combination with the following method and device claims.

Because, in an especially advantageous embodiment of the device, the spray nozzle is pointed directly at the gearwheel to be smoothed, it becomes possible to ensure sufficient lubrication during the smoothing process using an extremely small quantity of sprayed oil, without the smoothing wheels or the gearwheel to be smoothed being negatively influenced hereby. Since the device is purely a smoothing device for gearwheels, in which, for example, scale residues from the heat treatment of the gearwheels L1/8 - EP04003107.2 - 3 -are removed, hardly any noticeable material abrasion is to be expected, so that the use of washing oil or other cleaning liquid may be dispensed with completely.

The lubricant is preferably sprayed on a free surface region of the gearwheel to be smoothed when the already rotating smoothing wheel has been engaged load-free with the gearwheel to be smoothed, this advantageously occurring during a complete rotation of the gearwheel to be smoothed, through which complete and sufficient lubrication of the entire operating region of the gearwheel is ensured before beginning the basic operating step by applying the high pressure force. Method sequences in which the lubricant is sprayed one or more times shortly before and/or at the beginning of and/or even during the smoothing process are also conceivable.

According to a further preferred embodiment of the object of the present invention, the smoothing machine is equipped with a device, which generates an air stream, and corresponding air distribution lines to the gearwheel to be smoothed, but particularly only to the smoothing wheels, so that their heating because of frictional heat may be counteracted in a very simple and cost-effective way.
Furthermore, the gearwheels to be smoothed, which are continuously replaced, contribute to cooling of the smoothing wheels, which are always fixed on the device. In principle, other gases may also be used here.

An embodiment of the device in which the device that generates the air stream is provided with an assembly that operates according to the Joule-Thompson affect and also has a narrow expansion nozzle, in which the highly compressed air cools down strongly as it passes, values below -30 C to -50 C being achieved here, is especially advantageous. Using such an assembly, the occurrence of frictional heat is counteracted in a technically simple but effective way, which also operates quasi-wear-free.

The working method which may be performed using the device essentially corresponds to the known methods for smoothing gearwheels, their typical lubrication and cooling using a coolant-lubrication emulsion or using pure washing oils being replaced by an extremely minimal quantity of lubrication using a lubricant such as oil. This oil is sprayed one time at the beginning or during, but particularly before the beginning of the smoothing process, advantageously directly by one single spray nozzle as a fine spray mist onto the gearwheel to be smoothed, this sprayed oil quantity being sufficiently low that even after multiple hours of operation of the device, no oil sprays or larger contaminations are to be found in the region below the smoothing wheels. The application of the lubricant is preferably performed when the rotating smoothing wheel has been engaged load-free with the gearwheel to be smoothed, particularly using a spray stream lasting long enough that the gearwheel may be wetted over its entire circumference and all tooth flanks with lubricant.

The working method is also extremely environmentally friendly, since the quantities of oil used are very low and no liquids to be recycled arise. Furthermore, the entire device is very well accessible at any time, even in operation, and the operating process is observable, since the device is not permanently quasi-"underwater" and the view is not obstructed by sprayed spray protection walls.

- 4a -In one broad aspect, there is provided a method for burnishing gearwheels in a corresponding device having at least one burnishing wheel, the burnishing wheel acting radially on a gearwheel to be burnished, in which the burnishing wheel is driven via a motor and the gearwheel to be burnished is kept pressed with a high pressure force and along its axis of rotation oscillating against the burnishing wheel during a main operating step, wherein a minimal quantity of lubricant is applied to at least one of the gearwheel to be burnished and to the burnishing wheel, and that the lubricant is sprayed onto a free surface region of the gearwheel to be burnished.

In the following, an exemplary embodiment of the present invention is described in greater detail on the basis of the drawing.

Figure 1 shows an overall spatial illustration of a device for smoothing gearwheels and Figure 2 shows a detail enlargement of the operating region.

The device for smoothing or burnishing gear-wheels includes a machine table 10, on which two parallel guide rails 11 are placed, on which a frame-shaped carriage 12 for a driving smoothing wheel 5 and a further carriage 13, inside, the carriage 12, for a driven pair of smoothing wheels 29 is positioned so it is movable,-a pressurecylinder 14 being positioned on the carriage 12 for the driving smoothing wheel 5, which presses the carriage 13 for the driven pair of smoothing wheels 29 in the direction toward the driving smoothing wheel 5, a gearwheel 1 to be smoothed being held in operation clamped as a workpiece under a high radial pressure between the pair of smoothing wheels 5 and the single smoothing wheel 5. The gearwheel 1 to be smoothed is held axially clamped so it is radially movable by a clamping device 16, which is positioned on a C-shaped bracket 17, which is in turn attached via a spring assembly 18 and via an eccentric 19 on a holding stand 21 on such a way that it allows vertical oscillation of the gearwheel 1, which is only clamped axially, but is mounted quasi-floating radially, via an eccentric drive 20.

In order to be able to set the device for different sizes of gearwheels 1 to be smoothed and/or different smoothing wheels 5, the entire carriage 13 is movable together with the carriage 12 in relation to a fixed vertical axis of the clamping device 16 on the guide rails 11 via a small positioning cylinder 15.

As shown enlarged in Figure 2, the operating region of the device for smoothing gearwheels essentially includes three smoothing wheels 5 having fixed or pivotable vertical axes of rotation, of which a first smoothing wheel 5, referred to herein as driving smoothing wheel 5, is positioned on the carriage 12 and is driven by a motor 22.

The two other smoothing wheels 29 are positioned in a pair on the inner carriage 13 and may be pressed via the pressure cylinder 14 in the direction toward the driven smoothing wheel 5 in such a way that a gearwheel 1 to be smoothed, which is positioned between them, may be pressed against the smoothing wheels 5 using a force of 150 to 500 kg, for example.

Furthermore, the device is equipped with a spray nozzle 2, which may have enough pressure applied to it via a pressure generator 23, such as a pump, and a supply line 24 that a fine vaporized oil spray mist is sprayable on a free surface region of the gearwheel 1 to be smoothed during a complete rotation of the gearwheel 1 to be smoothed. The lubricant is applied after the rotating gearwheel 5 has been engaged load-free, i.e., still without having a pressure force applied to it, with the gearwheel 1 to be smoothed. The nozzle 2 is positioned via a support block 25 and an angularly adjustable carrier 26 on the carriage 13 in such a way that optimized application of the minimum quantity of lubricant may be performed through a very short pump stroke. The short spray stream may be generated in another way, however, such as through a valve-controlled nozzle.

Furthermore, the air cooler 7, which operates according to the Joule-Thompson affect, is also recognizable in Figure 2, which is connected to an air distributor 6, that directs air, strongly cooled down to -50 C, for example, against the smoothing wheels 5 to be cooled through three air distributor lines 4 and cold air nozzles 8. If necessary, more air distributor lines 4 may also be provided, even to the gearwheel 1 to be smoothed. The air is generated by a device 3 that generates an air stream, such as a pump or a compressor positioned below the machine table 10.

Claims (10)

1. A method for burnishing gearwheels in a corresponding device having at least one burnishing wheel, the burnishing wheel acting radially on a gearwheel to be burnished, in which the burnishing wheel is driven via a motor and the gearwheel to be burnished is kept pressed with a high pressure force and along its axis of rotation oscillating against the burnishing wheel during a main operating step, wherein a minimal quantity of lubricant is applied to at least one of the gearwheel to be burnished and to the burnishing wheel, and that the lubricant is sprayed onto a free surface region of the gearwheel to be burnished.
2. The method according to claim 1, wherein the lubricant is applied after the rotating burnishing wheel has been engaged load-free with the gearwheel to be burnished.
3. The method according to claim 1 or 2, wherein the minimal quantity of lubricant is applied through a spray nozzle as a very fine spray mist.
4. The method according to any one of claims 1 to 3, wherein the lubricant is sprayed by a short pump stroke of a pressure generator.
5. The method according to any one of claims 1 to 4, wherein the lubricant is applied to the gearwheel to be burnished during a complete rotation thereof.
6. The method according to any one of claims 1 to 5, wherein the burnishing wheels and/or the gearwheel to be burnished have an air stream blown on them for cooling.
7. The method according to any one of claims 1 to 6, wherein the air stream is made of cold air, ambient air first being subjected to high pressure by a pressure generator and subsequently, using the Joule-Thompson effect, passing a narrow nozzle in the air cooler and being cooled down strongly at the same time.
8. A device for performing the method according to any one of claims 1 to 7 having at least one burnishing wheel, that acts radially on a gearwheel to be burnished, wherein it is equipped with a spray nozzle, which generates a fine spray mist, for a lubricant, and a pressure generator, and the spray mist is sprayable onto the operating region of a gearwheel to be burnished and/or onto a burnishing wheel and that the spray nozzle is pointed toward a free surface region of the gearwheel to be burnished.
9. The device according to claim 8, wherein it is equipped with a device that generates an air stream and distributor lines to the burnishing wheels.
10. The device according to claim 8 or 9, wherein the device generating the air stream has an air cooler, which uses the Joule-Thompson effect, having a narrow expansion nozzle for compressed air, in which the air stream may be strongly cooled.
CA002465454A 2004-02-12 2004-04-27 Working method and device for smoothing gearwheels Expired - Fee Related CA2465454C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04003107.2 2004-02-12
EP04003107A EP1574286B1 (en) 2004-03-01 2004-03-01 Working method and device for the burnishing of gears

Publications (2)

Publication Number Publication Date
CA2465454A1 CA2465454A1 (en) 2005-08-12
CA2465454C true CA2465454C (en) 2009-03-24

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ID=34814240

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002465454A Expired - Fee Related CA2465454C (en) 2004-02-12 2004-04-27 Working method and device for smoothing gearwheels

Country Status (7)

Country Link
US (1) US20050181710A1 (en)
EP (1) EP1574286B1 (en)
AT (1) ATE389505T1 (en)
CA (1) CA2465454C (en)
DE (1) DE502004006567D1 (en)
ES (1) ES2304558T3 (en)
PL (1) PL1574286T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4137819B2 (en) * 2004-03-04 2008-08-20 ファナック株式会社 Machine tool with cooling mechanism
AT505118B1 (en) 2007-03-28 2013-03-15 Miba Sinter Austria Gmbh METHOD FOR PROCESSING A TRENCHING ON A SINTERED PART
CN105290287B (en) * 2015-11-19 2017-08-25 西安理工大学 Lathe is made in a kind of vertical cold breakdown
CN115338752B (en) * 2022-08-22 2023-07-18 国风塑业科技宿迁有限公司 Surface treatment equipment for plastic product molding and processing

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Also Published As

Publication number Publication date
EP1574286A1 (en) 2005-09-14
EP1574286B1 (en) 2008-03-19
US20050181710A1 (en) 2005-08-18
ES2304558T3 (en) 2008-10-16
DE502004006567D1 (en) 2008-04-30
CA2465454A1 (en) 2005-08-12
PL1574286T3 (en) 2008-08-29
ATE389505T1 (en) 2008-04-15

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