Head of electric point welding for multi-axis industrial robot and robot containing this head

FIELD: electricity.

SUBSTANCE: head includes a supporting member with an end portion for attaching to the robot wrist, a pair of welding electrodes held by the arms mounted on the supporting member with the ability to move between open and closed positions, an actuator and an electrical transformer provided with a casing, on different walls of the casing.

EFFECT: increasing the compactness and electrical reliability of the device.

7 cl, 18 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to welding and can be used for securing of hemispherical structure parts at welding of circular seams. This device comprises reduction gearbox with inclined rotational axis and built-in current feed device with sliding contact and positioning device of hemispherical structure of aluminium alloy arranged to spin at reduction gearbox driven shaft. Reduction gearbox conical gears are engaged via mid teeth pitch diameter with axial squeezing without radial and lateral clearances by means of springs fitted coaxially with rotary pins coaxially with conical gears. Said current feed device with sliding contact is insulated by appropriate sleeves fitted in conical gear hubs, reduction gearbox housing and at drive axle.

EFFECT: higher quality of the weld, decreased residual strain internal stress of welded parts.

3 cl, 1 dwg

FIELD: metallurgy.

SUBSTANCE: device is intended for single-side welding of butt joints in sheets preliminary assembled from sheet blanks. Sheet (1) supplied by roller conveyor (3) is fixed in welding zone. To set position of the welding head (4) relatively to the butt joint the device elements can move along the sheet (1) by means of the trolley (2). The trolley (2) has rotating support carriage (6). On the support carriage (6) power beams (11) with clamps (12) for the welded sheets (1) and support beams (13) with guides (14) of the welding machine with head (4) are secured. The forming backing (5) is located parallel to the guides (14) and is installed on the support carriage (6) with possibility of vertical movement relatively to the welding head (4). To visualize position of the longitudinal axis of the forming backing (5) relatively to the butt joint of the welded sheet plates (1) on the support carriage (6) the laser indicator is installed, and welding head (4) is set to the light mark of the laser beam. The device has automatic control panel and unit of recirculating water cooling of the forming backing.

EFFECT: improved device characteristics.

2 dwg

FIELD: process engineering.

SUBSTANCE: butt welding machine can be used for jointing the butts if strips (11, 12) by contact welding at appropriate plant. Two symmetric pairs of clamping jaws (22, 32, 31, 21) of the device for welding of one end of one strip (11) with second end of the other strip (12) are designed to retain and to position said ends of strips (11, 12) for connection by contact welding. Each of said jaws (22, 32, 31, 21) includes part (222, 212, 312, 322) to contact with one of said ends of strips (11). Every said jaw features the geometry and at least material which allow the decrease in eddy currents generated in said jaws due to electromagnetic induction at thermal processing of the weld. Said part of said jaw makes the kedge extending in direction of the strip end so that the gap between strip and induction head equals the depth of said ledge with due allowance for the gap there between.

EFFECT: continuous and compact weld, uniform cross-section, high quality of weld of thin strips.

15 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to devices for butt-to-butt connection of sections of a guide for suspended movable hoisting mechanisms and similar devices consisting of two halves. The sections are coupled with the help of bushes welded to their ends. At coupling the sections, their bushes are matched and a bolt is passed through them with a nut being screwed onto its protruding end. The end section of a weld joint, which connects the bush with the guide section wall, extends sidewards from the bush by the distance of 10…30 mm from it at the angle of 15°…45° to the longitudinal direction of the guide section. The weld joint shall be continuous at the transition into the end section extended sidewards, the said section shall be straight or bowed in the zone where the angle with the main section is formed.

EFFECT: weld joint provides for better strength of the connection and resistance to dynamic loads.

22 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: end surface of fragments to be coupled are levelled and cleaned. Bores are drilled therein and thread is cut. Said fragments are degreased by gasoline. Then, fragments are assembled to flat structure with the help of studs made of stainless steel. Then, edges are finished for welding, fragments are degreased and subjected to arc welding with application of bronze wire in lines of joint of said fragments. Now, welds are finished and surface of made structure is subjected to sand blasting.

EFFECT: higher strength and reliability of welds.

1 ex, 1 dwg

FIELD: transport.

SUBSTANCE: separate section of reducing roller shoe consists of the frame, two drive roller shoes articulated with reduction gear and motor and two idle free running roller shoes. One or several section of driven roller shoes consist of the frame, two driven roller shoes engaged by couplings with pairs of idle roller bearings an pair of idle roller bearings. Section of driven roller shoes are mounted with frame abutting on the section of driven reducing roller shoe to make an integrated section with aligned continuous drive rolling support and aligned continuous rolling support. Roller shoes in pairs are mounted at different heights, those nearby the bench lengthwise axis are arranged below far ones with allowance for touch of standard shells with four roller shoes at a time. The number of driven roller shoes is selected proceeding from the possibility for bench to support calibrated shells, to set them as required and to assemble in circular butt. Sections of mobile roller shoe are arranged at track to displace there along in mirror axis of roller bench.

EFFECT: possibility to assemble cylindrical housing of various length.

4 dwg

Coordinate device // 2535434

FIELD: process engineering.

SUBSTANCE: invention relates to coordinate device and can be used in high-precision processing hardware, primarily, for processing of articles by laser tools. Bed 1 supporting coordinate axes 2, 3 has the cavity that makes a spark-quench chamber 9 with openings 8. Working zone is communicated via openings 8 and spark-quench chamber 9 with gas-dust bend pipeline 7. Spark-quench chamber 9 openings 8 are communicated with working zone 6 by throttling device. At laser processing, air from working chamber and combustion products flows via throttling device in spark-quench chamber 9. Note here that flow rate drops to make combustion product particles settle in said chamber. Combustion products are discharged from spark-quench chamber via hatch. Plugs are used to adjust air intake from chamber part accommodating head with laser tool to allow air flow rate control for efficient removal of combustion products.

EFFECT: efficient removal of combustion products.

4 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: set of invention can be used for bonding the ends of metal strips together by point friction welding, for example, at the inlet of aluminium strip machining unit. In compliance with this invention, both edges of the strips are positioned one on the other to overlap. First, end of first strip (1) is locked by clamp (15) at outlet side. Start of second strip (2) is positioned across direction of motion relative to first strip end, for example, centred thereat and locked by clamp (14) at inlet side. Or, on the contrary, first, start of second strip (2) is locked to position first strip (1) end across direction of motion relative to second strip start to lock it thereat. Both are friction welded together at overlap zone by welding head (5) at several weld points. Proposed device comprises at least one clamp (15) at outlet side for locking the first metal strip (1) end and clamp (14) at outlet side to lock the second strip (2) end start. Said clamps (14) and (15) can displace across the direction of strips motion.

EFFECT: bonding of various metal alloys without burring.

18 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: this intention is used for making thin-wall conical shells with stiffness ribs by welding. Shell segments are made. Segment lengthwise edges are turned up to make stiffness ribs while segments are placed at detachable support plates arranged on carcass base to make a conical surface with clearance between lateral edges of adjacent support plates. Shell segments are placed at said carcass with turned up edges in clearances between support plates. Segments are subjected to transverse contraction unless edges of adjacent segments are jointed. Then, said segments are locked at said base and welded together along the lengthwise edges from outside. Then, detachable carcass support plates are withdrawn. Produced shell is withdrawn from said carcass together with detachable plates. Produced shell is machined. Welded shell has stiffness ribs made integral with the material of segments to up the strength.

EFFECT: higher reliability.

7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of welded thin-wall conical shell with lengthwise crimps, used for example as a heat shield of gas turbine engine nozzle. Shell segments are formed. Said segments are arranged at the bed shaped to truncated cone and furnished with the flange placed at larger-diameter end and supports arranged at said conical surface along generating lines. Segments crimps are placed at supports and locked at the bed. Then, stiff squeezer carcass composed of conical frame consisting of end flanges is arranged coaxially at said bed over its segments. Larger-diameter end flange is shaped to ring. All said flanges are interconnected by lengthwise strips with pressure elements arranged thereon. Frame ring-like flange and bed flange are tightened together. Then, segments are finally locked by thrusting them by pressure elements against conical surface. Lengthwise edges of adjacent are welded to unlock made shell and to remove it from the bed.

EFFECT: simplified process, expanded process performances.

6 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of steel sheet articles from different-depth steel sheet or strips. Billets are welded together along the butt to get the weld (7) composed by edges of steel sheet or strip workpiece. To rule out loss of quenched structure produced by heating to austenitising temperature, at least one edge of sheet or strip (8, 9) is coated before welding with thick fluid or solid powder or aerosol-like matter including at least one component increasing the strength of the weld (10).

EFFECT: higher weld strength.

28 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to automatic welding of fixed circular butts in horizontal plane. Invention can be used for welding pipes of refractory material of the VNS-16-grade. Pipes are jointed. Made joint is fixed by squeezing along butt edges. Ply of activation flux AF-71 as the mix dissolved in ethanol is applied the surfaces of said edges. Tungsten electrode arc is fired and displaced along said edges. In preparation of the weld, 1 mm deep mark with the angle of edges opening making 45 degrees in made in the butt between pipes.

EFFECT: perfected process.

2 cl

FIELD: machine building.

SUBSTANCE: invention relates to devices for butt-to-butt connection of sections of a guide for suspended movable hoisting mechanisms and similar devices consisting of two halves. The sections are coupled with the help of bushes welded to their ends. At coupling the sections, their bushes are matched and a bolt is passed through them with a nut being screwed onto its protruding end. The end section of a weld joint, which connects the bush with the guide section wall, extends sidewards from the bush by the distance of 10…30 mm from it at the angle of 15°…45° to the longitudinal direction of the guide section. The weld joint shall be continuous at the transition into the end section extended sidewards, the said section shall be straight or bowed in the zone where the angle with the main section is formed.

EFFECT: weld joint provides for better strength of the connection and resistance to dynamic loads.

22 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: metal plates are pressed by electrodes and conduct preliminary current pulse between them. For these plates welding electrodes with work part in form of cone with top angle from 100° to 140° are used. By means of the specified work part the electrode penetration to the metal plate surface and electric contact between electrodes and metal plates are ensured. After conduction of the preliminary current pulse the pressing force is increased and main current pulse is conducted.

EFFECT: invention ensures high quality welded joints by method of contact spot welding of metal plates with one-side non-conducting coating.

2 dwg, 1 tbl

FIELD: metallurgy.

SUBSTANCE: first, a shell with an outside end thickening of a cylindrical shape and a spherical bottom of a variable cross section is made of an O-bar of high-strength steel like SP-28 or VP-30 of a rolled plate. A reinforced throat is made from carbon steel 35. The thickness of a weld edge of the throat is chosen in the ratio of 2:1 to the thickness of the shell weld edge. The structure is assembled in a welding and assembly device with a removable pad so that the coincidence of axes and an annular manufacturing clearance at the butt, which is equal to 0.10…0.16 of the thickness of the shell weld edge, is provided. Gas-shielded welding is performed.

EFFECT: invention provides the quality of the weld joint from dissimilar steels and the uniform strength of the weld joint.

7 cl, 10 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to welding of metal wires. Welding is performed with the help of laser source to make the weld, in fact, not extending beyond the wire radial cross-section. Prior to welding, at least one of wires to be welded together is subjected to annealing in hot gas flow and/or, in welding, produced weld point is subjected to annealing by hot gas flow.

EFFECT: high-quality weld without further machining.

20 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: invention can be used in power plant engineering at manufacturing of corrugated walls of welded transformer bodies with extensive surfaces of active cooling. Reinforcement rods are laid on the corrugations on both sides of a wall and are fixed by holders. The edges are clamped and are held at welding by welding jaws. A filler wire is supplied to the gap between the rods and the corrugation parallel to the rod being welded. Supply of the filler wire is stopped, and the filler wire end between the rods and the corrugations is melt by an arc along with welding of the rods in the point of their contact with the corrugation. At the moment of filler wire melting, the end of the filler wire is torn away from the weld puddle by a reverse motion of a feeding unit. The corrugation edges are welded to form a common weld puddle. After welding is finished, the welding torches together with wire feeding unit are moved to the next corrugation or the wall is moved by a step to get the next corrugation in the welding position.

EFFECT: method provides for improved quality of welding monolithing seals with simultaneously increased output of corrugated wall production.

2 dwg

FIELD: metallurgy.

SUBSTANCE: shell segments with longitudinal corrugations and bent edges are formed. Segments are arranged on a base with lodgements for corrugations and pre-fixed on the base. After that, a stiff crimp-on frame is arranged on the base coaxially to it above the segments. Then, final fixation of segments and electron-beam welding of longitudinal joints of segments is performed in a vacuum chamber along bent edges with their further local heat treatment. Welding of joints and their heat treatment is performed first in one joint along the whole perimeter of the shell, and then, subsequently for the rest joints. Welding is performed in a pulse mode with certain parameters. Local heat treatment of a weld is performed by heating the weld with a scanned electron beam. After welding and heat treatment of all joints is completed, the finished shell is cooled, unfastened and removed from the base.

EFFECT: invention allows simplifying a manufacturing process of thin-wall shells, enlarging technological capabilities by obtaining corrugated conical shells and providing high accuracy of parameters of the obtained welded structure.

6 dwg

FIELD: metallurgy.

SUBSTANCE: method means simultaneous action on the external surface of the welded pipe samples of the laser beam and arc in shielded gases. Arc is generated by consumable electrode with creation if the common welding pool. Preliminary depth of embedding of the laser beam focal plane relatively to the external surface of the welded samples is set equal to (5±0.5 mm), and distance between axes of the laser beam and electrode is set equal to (3±0.5 mm). Fusion penetration is performed with beam power ≥10 kW. Inclination angle of the welding torch relatively to the laser beam is adjusted within range from 30° to 60° with change speed of the inclination angle of the welding torch relatively to the laser beam determined depending on welding speed and radius of the welded pipe samples. As the shielding medium the gas mixture containing active and inert gases is used.

EFFECT: quality improvement of the welded joint, welding efficiency and possibility of pipe samples welding with higher thickness.

FIELD: metallurgy.

SUBSTANCE: invention can be used at manufacture of vacuum arc-extinguishing chambers (VEC) for vacuum circuit breakers for the rated voltage of 110 kV and higher. Assembly of portions pre-soldered with the first solder metal and having one or more non-soldered seams between them is performed. The second solder metal is laid with lower fusion temperature than that of the first solder metal. Sealing of the VEC made in a vacuum furnace is performed. Gas is pumped out of the furnace volume with additional exposure at the temperature of not more than 100°C with duration that is sufficient for removal of gas from inner volume of the VEC being made through unsoldered seams. Heating is performed to the degassing temperature of VEC portions at the rate chosen from a condition providing the pressure inside VEC of not more than 10-2 Pa with exposure at the same temperature. Short-time heating and exposure is performed at fusion temperature of the second solder metal. After heating is completed, seams are sealed. The method involves non-stem pumping-out and sealing.

EFFECT: method provides for a possibility of group treatment of vacuum arc-extinguishing chambers of a large size and combination of assembly, pumping-out and sealing operations.

3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to welding. Invention can be used in instrument making, contact welding of high heat conductivity meats, particularly, copper and its alloys, and metal with coating base on the latter. Parts elements are assembled of copper and copper alloys. Produced assembly is arranged between welding electrodes. Welding is executed by passing welding current pulses and application of welding pressure. Welding electrodes are those made of graphite. Welding current pulses feed is performed at permanently pressed electrodes for time required for heating of part components to temperature not over 0.8 of copper fusion point. Note here that welding is performed in vacuum of 1.33·10-2 mm Hg.

EFFECT: welding of high electric conductivity metals, stable quality of welds, higher rust resistance, minimised weld defects.

1 tbl

Up!