GB2367520A

GB2367520A - Contact - impulse welding device

Info

Publication number: GB2367520A
Application number: GB0024159A
Authority: GB
Inventors: Stanislav Brodski; Yevgeny Brodski
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-03
Filing date: 2000-10-03
Publication date: 2002-04-10
Anticipated expiration: 2020-10-03
Also published as: GB2367520B; GB0024159D0

Abstract

A device for dispensing a preset length of welding wire in contact - impulse welding comprises a shuttle 5 located in a body 3, and which can be held against a spring 7 by means of a latch 11. The shuttle clamps onto a welding wire 1 so that on release of the latch a preset length of wire is advanced at the same time as a charge is fed to the welding wire from a battery of condensers. A further spring 8 causes the shuttle to bounce back thus pulling the wire back and terminating the weld. Instead of the spring 7 electromagnetic, hydraulic, pneumatic, electromechanical, magnetic-impulse or other means may be used. The device can alternatively advance a detail piece for welding rather than the welding wire. (Figure 3, not shown).

Description

Construction of a Device for Contact-Impulse Welding Introduction Proposed invention belongs to a class of devices for welding steels and alloys.

In the proposed construction of the device for contact-impulse welding and patch welding a battery of condensers accumulates energy, which meets the parameters of impulse welding. With the help of these charges of the battery of the condensers the proposed construction carries out the contact-impulse welding.

The proposed construction can be used for conducting welding assembly works in workshops, laboratories, at home, in field and breakdown conditions, where neither specialised welding equipment nor powerful electricity sources are available. Besides the proposed construction can be used for welding in exact mechanics and in jewellery woks. The proposed construction can also be used by artists in art patch welding of metals on metals and also in repair works.

The proposed construction is presented on Figure 1 and Figure 2 and Figure 3 and is described in the description of the invention.

Description of the Invention of A Construction of the Device for Contact-Impulse Welding The construction of the device for contact-impulse welding comprises a battery of condensers with an automatic control of charging and discharging of the battery, a spool with an electrode wire 1 accommodated in a special box from which the electrode wire 1 is laid in a protecting hose 2 to a body 3 of the device with a dielectric cover 4. The electrode wire 1 passes inside the body 3 through a shuttle 5, a regulating screw 6, springs 7 and 8 and a ceramic cup 9.

The shuttle 5 can move within the body 3 of the device in an aperture 10 and can be fixed by a latch 11 with the help of a lever of the control of the latch 12.

And the electrode wire can be fixed and released with the help of a nut 13 and a coupling rod 14.

The device for contact-impulse welding can be re-equipped into a device for contact welding of small details to bigger ones by putting a cylindrical nozzle 16 on the body 3 inside of which there is a coupling rod 17 one end of which is fixed in the shuttle 5 and the other end has a gadget 18 for fixing details.

The cylindrical nozzle 16 is equipped with a prop 19 for the ceramic ring 20.

Any small detail 21 is being fixed in the gadget for fixing details 18, and the detail 21 is being welded to another detail 22.

Work of the Device for Contact-Impulse Welding The electrode wire 1 is laid in the protecting hose 2 and inside the body 3 of the device, which has a dielectric cover 4. The electrode wire 1 in the body 3 passes through the shuttle 5, the control screw 6, the springs 7 and 8 and the ceramic cup 9 and is being moved into a zone of welding or patch welding with the help of the shuttle 5, which is being shifted manually squeezing the spring 7 onto a new length of the electrode wire 1 along the aperture 10, and is fixed there by the latch 11, which is controlled with the lever 12. And th electrode wire is being fixed with the shuttle 5-with the help of the nut 13 and the coupling rod 14. Then the device is put onto a place of welding or patch welding through the ceramic cup 9. And the latch 11 is being retracted with the help of the lever 12; and the shuttle 5 possessing high potential energy moves the electrode wire 1 at high speed onto precisely calculated length of welding zone-depending on the power of the impulse, the diameter of the electrode and the speed at which it is being moved. In the process of a discharge the moved length of the electrode wire 1 melts and builds up in the place of welding or patch welding forming a weld seam or a patch weld. On serving of the electrode wire 1, the shuttle 5 squeezes the small spring 8 and looses all its kinetic energy. The next instant the spring 8 throws the shuttle 5 back for a small distance which retracts the electrode wire 1 from the melted metal thus preventing the electrode wire 1 from sticking to a weld seam or a patch weld.

Then the electrode wire is being released by weakening the nut 13, and the the shuttle 5 is moved to a new position on the electrode wire 1 by pressing the nut 13, and is fixed there by the latch 11, and the electrode wire is fixed in the shuttle 5 by a slight turn of the nut 13. The device is then moved to a new place of welding or patch welding; and the cycle of works repeats itself. The ceramic cup 9 can be of several shapes-depending on the type of the joint being welded. The complete cycle of works can be automated and programmed; the spring 7 serving the shuttle 5 can be substituted by electromagnetic, pneumatic, hydraulic, magnetic-impulse, electromechanical and other schemes of serving the shuttle 5. The body 3 may be fully made of dielectric material as shown on Figure 2.

The device for contact-impulse welding can be re-equipped into a device for contact welding. With this purpose the cylindrical nozzle 16 is screwed on the thread 15 of the device, and the electrode wire 1 is replaced with welding wire which is being fixed in the shuttle 5, the other end of the shuttle fixes the coupling rod 17 which on its other end has the gadget 18 for fixing small details. On elevation of the shuttle 5 against the spring 7 the shuttle 5 is fixed with the latch 11. Then both the shuttle 5 and the coupling rod 17 with a detail 21-fixed with the gadget 18-possess some potential energy. The ceramic ring 20 is put on the cylindrical nozzle 16; and the device-through the ring 20 - is fixed on the site of welding of the details. A circuit wire is being fastened onto the bigger detail ; the latch 11 is retracted with the lever 12. On rapprochement of the details, a discharge between them occurs which welds the details together.

Claims

Claims Claim1. Construction of the device for contact-impulse welding or patch welding comprising a battery of condensers, forming charges corresponding with the parameters of impulse welding, with an automatic control of charging and discharging of the condensers, an electrode wire, a mechanism for moving the electrode wire Into the zone of welding or patch welding which constitutes a section of a pipe of round, oval or polygonal shape in a crosssection with an aperture for a shuttle which can move inside the body in the aperture along the electrode wire passing inside the body and the shuttle, a closing circuit wire, running from the condenser onto the detail, the device also has a changeable ceramic cup which is being put onto the device before carrying out the works, and the device is put onto a joint of the details to be welded or a spot of patch welding, through this ceramic cup, which at the same time serves as an isolator and protects from radiation produced by welding, and allows for welding or patch welding to be conducted on an exactly designated spot, excelling known constructions in that with the object of carrying out the contact-impulse welding, the shuttle moves to a new position on the electrode wire acquiring kinetic energy due to the compression of the spring, situated in the body, and which is fixed in a new position in the body with the help of the latch, and the electrode wire is being fixed by the shuttle with the help of the coupling rod and the nut, and when the works are conducted the latch is retracted with the help of a lever controlling the latch, and the shuttle under the influence of the spring at high speed moves a length of the electrode wire into the zone of welding or patch welding creating a discharge, moreover the length of the electrode wire moved is strictly appropriate to the power of the discharge, the diameter of the electrode wire and the speed at which the electrode wire is moved, set as specified in the instruction for use of the device, and the melted in the process of the discharge electrode wire builds up forming a weld seam or a patch weld and the cycle of works repeats itself on a new place of welding or patch welding, moreover instead of the spring imparting energy to the shuttle electromagnetic, hydraulic, pneumatic, electromechanical, magnetic-impulse and other devices can be used, and the whole cycle of production works can

be automated.

, \ Claim
2. Construction of the device for contact-impulse welding or patch welding claimed in Claim 1 comprising a body with an aperture for a shuttle inside which an electrode wire passes and others details, excelling known constructions in that with the object of adjusting the speed at which the electrode wire is moved into the zone of welding or patch welding and the capacity of the battery of the condensers for a chosen suitable regime of work - calculated according to the diameter and the length of the electrode wire being moved, the power of the discharge impulse, the potential energy of the spring imparting energy to the shuttle and thus the speed, at which the electrode is moved, are being regulated by revolving the screw of the potential energy of the spring on a thread in the body and adjusting the calculated capacity of the battery of the condensers by turning on or off a part of the battery according to the instruction for use of the devise that takes into account interconnection of all the parameters in optimum calculated limits.
Claim 3. Construction of the device for contact-impulse welding claimed in Claim 1 comprising a body with an aperture, a shuttle capable of moving inside the body along the aperture and others excelling known constructions in that with the object of broadening of the spectrum of regimes of work of the device and carrying the contact-impulse welding in a required regime-from welding steel details of significant thickness to jewellery works, the length of the electrode wire being moved into the zone of welding in the process of the discharge of the battery of the condensers-depending on the chosen regime of works, can be regulated by changing the free-wheeling distance of the shuttle by filling the space between the small spring and the butt-end of the device with special washers or by removing them which accordingly leads to either reduction or increase in size of the weld seam, simultaneously other parameters of the contact-impulse welding change-the speed at which the electrode wire is moved, the charge of the battery of the condensers and the diameter of the electrode wire which should correspond with those in the instruction for use of the device that takes into account the interconnection of all the parameters in optimum calculated limits.
Claim 4. Construction of the device for contact-impulse welding claimed in Claim 1 excelling known constructions in that with the object of preventing the electrode wire from sticking to the weld seam or a patch weld the device is equipped with a second small spring at the outlet of the device which works at the last instant of the discharge after the shuttle with the electrode wire takes the position at the outlet where it squeezes the spring and loses all its kinetic energy, the next instant the small spring throws the shuttle back from the welding zone and the shuttle retracts the electrode wire from the melted seam or a patch weld, this prevents the electrode from sticking to the weld seam or a patch weld.
Claim 5. Construction of the device for contact-impulse welding claimed in Claim 1 comprising body of the device with an aperture for free-wheeling of a shuttle inside the body along the aperture, a welding wire passing inside the body, closing circuit wire, running from condenser onto the detail, excelling known constructions in that with the object of broadening the spectrum of possible works being conducted the device is equipped with an external thread at the end of the device on which a cylindrical nozzle for contact welding is screwed on, and one side of the shuttle fixes the end of the welding wire and the other side-a coupling rod, the other end of which has a gadget for fixing various small details, a ceramic ring is put on the cylindrical nozzle before the work, and the whole device is put onto a place of welding of details and then the shuttle is lifted against the spring and fixed, then the fixer is taken out, and the attached detail, dragged by the shuttle via the coupling rod, rashes at the other detail and a discharge of the battery of the condensers occurs between the details on their rapprochement which welds the details together, and the cylindrical nozzle and the ceramic ring are protecting from radiation produced during welding.