GB2215250A - Machine for electric spark deposit welding of rotational surfaces - Google Patents
Machine for electric spark deposit welding of rotational surfaces Download PDFInfo
- Publication number
- GB2215250A GB2215250A GB8804920A GB8804920A GB2215250A GB 2215250 A GB2215250 A GB 2215250A GB 8804920 A GB8804920 A GB 8804920A GB 8804920 A GB8804920 A GB 8804920A GB 2215250 A GB2215250 A GB 2215250A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- deposit welding
- welding head
- electric motor
- deposit
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/0013—Resistance welding; Severing by resistance heating welding for reasons other than joining, e.g. build up welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Resistance Welding (AREA)
Description
1 1 MACHINE FOR ELECTRIC SPARK DEPOSIT WELDING OF ROTATIONAL SURFACES This
invention relates to a machine for electric spark deposit welding of rotational surfaces, particularly of toothed wheels.
A known device for electric spark deposit welding i.e. coating of surfaces by electric spark deposition comprises a deposit welding head connected to a DC electric motor. This deposit welding head contains a plurality of disc electrode s mounted on a shaf t. The electric motor is attached to a drive screw connected via a drive nut to the deposit welding head which is disposed on a slidable member. For its part, the slidable member is connected by means of a nut to a screw which is connected to a ratchet and pawl mechanism and is provided with a limiting screw, an electromagnet and a pointer.
This ratchet and pawl mechanism is attached to a body mounted in turn on a longitudinal slide member which is, in its turn, disposed on guideways. The longitudinal slide member is connected by means of a rack and pinion gear to a second electric motor. Below the tool electrode combination is disposed a table mountedfor eccentric motion which is connected by means of a toothed belt gear with a DC electric motor. The longitudinal slide member is connected with the table via a correction device. A disadvantage of this design of machine is that it does not allow deposit welding of toothed wheels and other rotational surfaces of tools and parts subject to wear to take place.
According to the present invention, there is provided a machine for electric spark deposit welding of rotational surfaces, comprising a DC electric motor connected by a drive screw arrangement with a deposit welding head, which welding head is mounted directly on a nut in engagement with the screw and comprises three disc electrodes set at an angle of 1200 to each other and each mounted on an arm hingedly connected to the deposit 111 t, welding head, each disc electrode having an associated electric motor, there being disposed below the deposit welding head a horizontal self- aligning support fastened to a shaft connected in turn via a flexible link to an oscillating system, said shaft additionally being connected to means for imparting rotational motion thereto.
A machine embodying the invention has the particular advantages of allowing deposit welding of rotational surfaces to be carried out therewith. Wear resistant layers can be obtained which possess uniform thickness and have deposited surface of reduced roughness, irrespective of the skill of the operator of the machine. By the use of three disc electrodes, a high productivity of coating is obtained by deposit welding.
In addition productivity is enhanced through the automatic operation which is achieved with the machine and by the increased frequency of oscillation allowing more frequent contacting of depositing material with the suifaces to be coated.
For a better understanding of the invention and to show how the same can be carried into effect, reference will now be made by way of example only to the accompanying drawing in which there is shown the working interrelationship between the component parts of one form of spark deposit welding machine embodying the invention.
Referring to the drawing, the illustrated spark deposit welding machine comprises a DC electric motor 1 which drives rotationally one member of a meshing pair 2 of toothed wheels, the other member of which pair is connected via a drive screw 3 and nut member 4 to a deposit welding head 5. Three disc electrodes 8, arranged at an angle of 120 0 to each other, are mounted on the deposit welding head. Each disc electrode 8 is fastened to an arm 7 which is connected to a hinge 6 mounted on the welding head 5. Each disc electrode 8 is i i 4 _1 11:
1 -3connected to its own associated electric motor 9. A horizontal selfaligning support 11, fastened to a short shaft 12 is mounted below the deposit welding head 5.
The support 11 is connected via a flexible clutch 13 and a vertical connection 14 to an oscillating system 15.
The oscillating system 15 is connected to a static inductive switch 17. A short shaf t 12 is attached to a mechanism 16 for producing rotational motion. Below the oscillating system 15 there is disposed an electromagnet 18 connected to a pulse generator 19.
The spark deposit welding machine operates as follows:
The rapidly operating DC electric motor 1 is switched on and its motion is transmitted to the pair 2 of toothed wheels, the driving screw 3 and its associated nut 4, to the deposit welding head 5 with the disc electrodes 8 which is moved downwards. When a preset distance "a" exists between the disc electrodes 8 and a toothed wheel 10, the DC electric motor 1 is switched over to a slow speed, while at the same time the wheel 10 is switched on to operate with a fast rotation. At this stage, the three disc electrodes 8 are pressed against the wheel 10 by means of a mechanism 16 for producing rotational motion and the former is moved downwards, overcoming the reciprocating forces of the oscillating system 15 until a preset distance "b" necessary for switching the static inductive switch 17 exists between switch 17 and the system 15. When the switch 17 is actuated, the DC electric motor 1 and the fast rotation of the toothed wheel 10 are switched off and the following are switched on: the electric motor 9, the toothed wheel 10 in a slow operating mode, the pulse generator 19 and the electromagnet 18. In this way oscillations are produced in the oscillating system 15 which are necessary for effecting an electric spark deposit welding procedure. The duration of electric spark deposit welding of the toothed wheel 10 is preset 1 by a time relay or limit switches. As a result of the presence of the hinge 6 and the self aligning support 11, when slow rotation of the toothed wheel 10 takes place, there is effected a contacting of the disc electrodes 8 thereby along a narrow strip of projecting profile of the teeth on the front working surface of the toothed wheel 10. The frequency of oscillation of the oscillating system 15 depends on the oscillation amplitude which is determined by the magnitude of the pressure exerted by the disc electrodes on the toothed wheel 10. At small amplitudes, a high frequency of oscillation is achieved since the path of the deposit welded toothed wheel 10 is shortened. After the termination of the deposit welding, the welding head 5 is returned to its initial position and the mechanism is switched off, that is the mechanism for rotational motion 16, the DC electric motor 1, the electric motor 9, the electromagnet 18 and the pulse generator 19 are all switched off.
1 1
Claims (4)
1. A machine for electric spark deposit welding of rotational surfaces, comprising a DC electric motor connected by a drive screw arrangement with a deposit welding head, which welding head is mounted directly on a nut in engagement with the screw and comprises three disc electrodes set at an angle of 1200 to each other and each mounted on an arm hingedly connected to the deposit welding head, each disc electrode having an associated electric motor, there being disposed below the deposit welding head a horizontal self-aligning support fastened to a shaft connected in turn via a flexible link to an oscillating system, said shaft additionally being connected to means for imparting rotational motion thereto.
2. A machine as claimed in claim 1, wherein the oscillating system is connected to a static inductive switch.
3. A machine as claimed in claim 1 or 2, wherein the flexible link comprises a flexible clutch and a vertical axle extending therefrom to the oscillating system.
4. A machine for electric spark deposit welding of rotational surfaces, substantially as hereinbefore described with reference to the accompanying drawing.
Published 1989 at The Patent Office, State House, 8871 F110 HolboM,LondonWCIR 4TP. Further copies maybe obtained from The PatentOfficeSales Branch, St Mary Cray, Orpingwn, Kent BR5 3F.D. Printed by MWtaplex techniques ltd, St Mary Cray, Kent, Con. 1/87
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883801538 DE3801538A1 (en) | 1988-01-20 | 1988-01-20 | DEVICE FOR ELECTRIC SPARK WELDING ON THE FRONT OF ROTATION BODIES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8804920D0 GB8804920D0 (en) | 1988-03-30 |
| GB2215250A true GB2215250A (en) | 1989-09-20 |
Family
ID=6345625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8804920A Withdrawn GB2215250A (en) | 1988-01-20 | 1988-03-02 | Machine for electric spark deposit welding of rotational surfaces |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH674720A5 (en) |
| DE (1) | DE3801538A1 (en) |
| GB (1) | GB2215250A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9517521B2 (en) | 2012-07-05 | 2016-12-13 | General Electric Company | Method for repairing component |
| US11077516B2 (en) | 2016-12-28 | 2021-08-03 | Huys Industries Limited | Vibrating welding apparatus and method |
| US11666981B2 (en) | 2013-12-16 | 2023-06-06 | Huys Industries Limited | Welding method and apparatus therefor |
| US12083631B2 (en) | 2020-04-14 | 2024-09-10 | Huys Industries Limited | Welded assembly and method of welding using electro-spark discharge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321407A (en) * | 2018-12-15 | 2020-06-23 | 兰州交通大学 | Electric spark deposition mechanism for wear-resistant coating on inner wall of cylinder sleeve of internal combustion engine cylinder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG28111A1 (en) * | 1977-11-29 | 1980-03-25 | Antonov | Apparatus for elektrosparking piling ud |
| DE3473125D1 (en) * | 1983-10-26 | 1988-09-08 | Inoue Japax Res | Automatic spark-depositing apparatus |
| CH668569A5 (en) * | 1985-08-30 | 1989-01-13 | Zentralen Mash I Mez Gorna Mal | ELECTRIC SPARK ORDER WELDING METHOD AND DEVICE FOR CARRYING OUT THE METHOD. |
-
1988
- 1988-01-04 CH CH1088A patent/CH674720A5/de not_active IP Right Cessation
- 1988-01-20 DE DE19883801538 patent/DE3801538A1/en not_active Withdrawn
- 1988-03-02 GB GB8804920A patent/GB2215250A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9517521B2 (en) | 2012-07-05 | 2016-12-13 | General Electric Company | Method for repairing component |
| US11666981B2 (en) | 2013-12-16 | 2023-06-06 | Huys Industries Limited | Welding method and apparatus therefor |
| US11077516B2 (en) | 2016-12-28 | 2021-08-03 | Huys Industries Limited | Vibrating welding apparatus and method |
| US12083631B2 (en) | 2020-04-14 | 2024-09-10 | Huys Industries Limited | Welded assembly and method of welding using electro-spark discharge |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8804920D0 (en) | 1988-03-30 |
| CH674720A5 (en) | 1990-07-13 |
| DE3801538A1 (en) | 1989-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |