CN211539878U - Automatic welding device for straight welding seams on two sides of automobile rear axle housing - Google Patents
Automatic welding device for straight welding seams on two sides of automobile rear axle housing Download PDFInfo
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- CN211539878U CN211539878U CN201922276887.8U CN201922276887U CN211539878U CN 211539878 U CN211539878 U CN 211539878U CN 201922276887 U CN201922276887 U CN 201922276887U CN 211539878 U CN211539878 U CN 211539878U
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Abstract
The utility model discloses an automatic welding device for straight welding seams on two sides of an automobile rear axle housing, which comprises a main body, a horizontal moving unit, a vertical moving unit, a welding gun and a supporting and positioning unit; a first mounting plate and a second mounting plate are arranged on the main body; two groups of horizontal moving units are symmetrically arranged on the second working table surface; the vertical moving unit comprises an air cylinder, an air cylinder connecting plate and a support connecting plate; the welding gun is arranged on the support connecting plate; the supporting and positioning unit comprises a V-shaped positioning support, an adjustable leveling and aligning support and an axial limiting plate. The utility model discloses accurate fix a position rear-axle housing, still be in the horizontality after can leveling alignment support restriction rear-axle housing upset, linear slide rail, slide rail that this structure had ensured among the screw sliding mechanism drive the steady walking of welder elevating system. The problems that the existing automobile rear axle housing double-side straight weld welding process is multiple in working procedures, low in production efficiency, large in equipment cost investment and low in welding process capability index are solved.
Description
Technical Field
The utility model belongs to axle welding set design field, concretely relates to automatic welder of two side 4 straight welds of car rear axle.
Background
Lubricating oil needs to be added for gear transmission inside an axle (an automobile rear drive axle), so that the air tightness of the axle is particularly important. The axle housing is used as an important component part of an axle, the axle housing is structurally formed by welding a plurality of stamping parts and pipes, the splicing positions are connected through MAG fusion welding, and welding defects at the splicing positions directly influence the air tightness of the whole axle. Welding defects such as welding deviation, air holes, inclusions, undercut and the like are closely related to welding parameters such as a welding gun walking track, an angle, a welding speed, welding current and the like, and instability or change of any parameter can influence welding seam forming. At present, the traditional processing and manufacturing mode is manual welding, the process capability index is low, various uncertain factors of parameters are more, the welding quality is unstable, and the production efficiency is low. And although the welding is carried out by adopting an advanced robot, the quality is stable, the processing efficiency is high, and the processing cost is obviously improved.
In CN 109332979A "an automobile rear-axle housing automatic welder", the characteristics of the welding set are disclosed: the rotary clamping mechanism comprises a wedge, a wedge seat, a first ejector rod and a second ejector rod, the first ejector rod is symmetrically arranged for 180 degrees in a first sliding groove of the wedge seat, the second ejector rod is symmetrically arranged for 180 degrees in a second sliding groove of the wedge seat, the first sliding groove and the second sliding groove are at an angle of 90 degrees, the wedge is matched with a first end of the first ejector rod and a first end of the second ejector rod, and a tightening disc is horizontally arranged at two ends of the upper portion of the rotary clamping mechanism. The welding method comprises the following steps: positioning the bridge shell cover and the reinforcing ring and then performing spot welding; welding a horizontal circular weld seam; and welding a vertical circular welding seam. Although this patent is solved and is realized the welding of 6 girth welds on a device, its structure and function can't satisfy the automatic weld of rear-axle housing straight weld.
CN 106513927A "automatic straight welding device", discloses an automatic straight welding device, which is characterized in that the device comprises a frame provided with a welding gun support seat slide rail and a working support rod, one end of the working support rod is hinged on the frame, the frame is also provided with a fixed pressure head for fixing the other end of the working support rod and a limiting plate for limiting the position of a workpiece to be machined, the limiting plate can slide on the frame, the frame part corresponding to the limiting plate is a fixed plate, the welding gun support seat slide rail is provided with a welding gun support seat with a vertical guide rail and a motor for driving the welding gun support seat to slide, the vertical guide rail of the welding gun support seat is provided with a sliding part, the sliding part is provided with a screw rod, the screw rod can rotate on the sliding part, the screw rod is provided with a welding gun body, the welding gun body is communicated with a wire feeder for feeding. Although this patent is solved the welding of straight weld, receive its structural constraint and can't accomplish the welding when 2 straight weld of automobile rear-axle housing single face, its structure can't guarantee simultaneously that rear-axle housing is in the horizontality. In addition, the welding gun is easily collided and damaged when a workpiece is loaded due to the limitation of the welding gun support structure.
CN 103692121B "automatic straight seam welding machine", discloses an automatic straight seam welding machine that can realize double straight seam welding, its characterized in that is provided with carousel and carousel drive arrangement in the frame, is provided with two stations on the carousel and is located the light screen between two stations, is provided with one set of clamping device on every station, the frame on one side of keeping away from operating personnel be provided with the guide rail, sliding device has a pair of support on the guide rail, is provided with support locking device between every support and the guide rail respectively, the support on be provided with the cylinder, be provided with welder on the piston rod of cylinder. The welding of small-size work piece straight line seam is solved to this patent, nevertheless receives structure limitations such as its frame, workstation and clamping device, can't accomplish the accurate location and the welding of great work pieces such as rear axle casing.
CN 110293356A "full-automatic straight welding equipment", discloses full-automatic straight welding equipment, which is characterized in that the middle of a frame is provided with a main shaft for placing a workpiece, the periphery of the main shaft is provided with a welding mechanism, a positioning component and a clamping component, and the welding mechanism is arranged right above the main shaft; the positioning assembly at least comprises clamping mechanisms arranged at the left side and the right side above the main shaft and a positioning plate mechanism movably arranged between the clamping mechanisms at the left side and the right side; the clamping assembly at least comprises side positioning mechanisms arranged on the left side and the right side of the main shaft. Although the straight welding line of the cylindrical workpiece rolled and formed by the plate rolling machine can be welded, the accurate positioning and welding of the rear axle housing and the bilateral symmetrical straight welding line of the automobile cannot be completed due to the structural limitations of the clamping mechanism, the positioning plate mechanism, the side positioning mechanism and the like.
In CN 109396702 a, "automatic straight seam welding device", an automatic straight seam welding device is disclosed, which comprises a frame and a welding structure, wherein the frame is provided with a workbench; a strip-shaped groove is formed in the middle of the workbench, the strip-shaped groove is overlapped with the moving direction of the welding gun, and the positioning plate is positioned in the strip-shaped groove and can slide up and down along the strip-shaped groove; two sides of the workbench are respectively provided with a pushing mechanism; two side parts of the positioning plate are respectively provided with a sliding groove, and each sliding groove is internally and slidably connected with a sliding rod; the positioning plate is provided with a cavity, and a vertical upright post is arranged in the cavity; the upper part of the upright post is rotatably connected with a first circular ring and a second circular ring which can conduct electricity; the sliding rod is connected with the first circular ring/the second circular ring through a connecting rod; insulating layers are respectively arranged on the abutted surfaces of the first circular ring and the second circular ring, and the insulating layers of the first circular ring and the second circular ring are respectively provided with a conductive end; a control structure for controlling the positioning plate to move downwards is arranged in the workbench, and the first circular ring and the second circular ring are located in a circuit of the control mechanism. Although this patent can solve large-scale panel and tailor welding and form the welding of the straight weld of burning furnace, nevertheless receive the influence of its workstation and welding mechanism isotructure, can't be to the accurate location of car rear-axle housing, to the unable while welding of 2 straight welds of its bilateral symmetry, influence machining efficiency.
CN 203003368U ' automobile rear-axle housing longitudinal joint automatic welder ', discloses an automobile rear-axle housing longitudinal joint automatic welder, including frame, work piece elevating system, work piece clamping tilting mechanism, aircraft nose layer board running gear and welder fixture, its characterized in that, welder fixture includes connecting guide arm, height adjustment mechanism, little pendulum mechanism, pendulum rod and supporting rod, little pendulum mechanism includes eccentric wheel case, eccentric wheel, little pendulum motor, eccentric wheel axle, reset spring, connecting sliding sleeve, and the eccentric wheel is fixed on the eccentric wheel axle, and connecting sliding sleeve is perpendicular to eccentric wheel axle and installs on the eccentric wheel case curb plate with eccentric wheel axle wait high, and the pendulum rod cartridge is inside connecting sliding sleeve, installs reset spring between pendulum rod and connecting sliding sleeve, and the pendulum rod leans on eccentric wheel side end face pressfitting under reset spring's effect on the eccentric wheel working face. The micro-swing mechanism in the welding gun clamping mechanism drives the eccentric wheel through the micro-swing motor, so that the welding gun swings in the front-back direction to solve the problem that a straight seam is not parallel to the welding gun due to unstable positioning, the whole device is complex in structure, and the occupied area is large. Meanwhile, the eccentric wheel device cannot determine that the welding gun is in the middle of the swing amplitude before working every time, so that welding consistency cannot be guaranteed. The workpiece overturning and clamping mechanism cannot accurately position the rear axle shell and cannot overturn the rear axle shell without a limiting device, and a welding gun needs to be adjusted before working at every time, so that the production efficiency is influenced.
CN 207824274U "a double-gun straight seam automatic weld frock" discloses a double-gun straight seam automatic weld frock, including frame and two welding set that the structure is the same, be provided with tip fixing device below the frame, its characterized in that, be provided with transverse guide rail in the frame, two welding set is followed by a horizontal walking drive device drive respectively transverse walking. The welding device comprises a support, a longitudinal walking driving device is arranged above the support, a support is longitudinally arranged at the lower part of the support, a longitudinal guide rail and a welding gun fixing seat driven by the longitudinal walking driving device to walk along the longitudinal guide rail are arranged on the support, and a welding gun is arranged on the welding gun fixing seat; visual image collectors are arranged at the bottom ends of the two welding gun fixing seats; a displacement sensor is arranged at the bottom end of the bracket; the end fixing device comprises a transverse rail, two longitudinal supporting plates are symmetrically arranged on the rail, a positive and negative tooth screw rod driven by a clamping driving device is arranged below the rail, and two nuts of the positive and negative tooth screw rod respectively penetrate through the rail and are respectively connected with the two supporting plates; the middle parts of the two supporting plates are both provided with a reference groove; the welding of automobile rear-axle housing transversal joint is solved to this patent, guarantees welding quality and welding stability simultaneously, nevertheless receives the tight mode influence of the tight mode of clamp of the locate mode of its fixed boss and motor drive positive and negative tooth lead screw, and all location clamp tightly need be repeatedly loosened and press from both sides tightly when accomplishing one side welding back upset opposite side, and the locate mode is complicated to be pressed from both sides tightly and is loosened the cycle length, seriously influences machining efficiency. Meanwhile, the tool is complex in structure, high in production cost and high in manufacturing cost, so that the machining cost of the rear axle housing is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two side straight weld automatic welder of car rear-axle housing has solved that traditional artifical manual welding process ability index is low, has not only solved the unstable and low problem of production efficiency of welding quality, overcomes simultaneously and adopts advanced robot to carry out the high difficulty of welding process cost. The device is provided with two sets of welding travelling mechanisms and welding systems, so that simultaneous welding on both sides can be met, and automatic welding of 4 straight welding seams on both sides can be completed only by turning over once.
The utility model adopts the technical proposal that: the utility model provides a two side straight weld automatic welder of car rear-axle housing which characterized in that:
the welding gun comprises a main body, a horizontal moving unit, a vertical moving unit, a welding gun and a supporting and positioning unit matched with a rear axle housing;
the main body is a frame consisting of upright posts and a cross beam, and a first mounting plate and a second mounting plate are arranged on the main body;
the two groups of horizontal moving units are symmetrically arranged on the second working table surface, each group of horizontal moving units comprises a lead screw and a nut sliding mechanism matched with the lead screw, two ends of the lead screw are respectively matched with a fixed end and a supporting end which are arranged on the second mounting plate, and one end of the lead screw penetrates through the fixed end and is matched with the driving mechanism;
the vertical moving unit comprises an air cylinder matched with the nut sliding mechanism, an L-shaped air cylinder connecting plate fixed on the air cylinder body and an L-shaped support connecting plate, and a second sliding rail and a second sliding block which are matched with each other are respectively arranged on the air cylinder connecting plate and the support connecting plate;
the welding gun is arranged on the support connecting plate, and one side of the main body is also provided with a wire feeding mechanism matched with the welding gun;
support the positioning unit including set up on first mounting panel with rear-axle housing matched with V type locating support, with rear-axle housing downside matched with can smooth alignment support and with rear-axle housing tip matched with axial limiting plate.
Further: the adjustable leveling and aligning support comprises a base and a positioning end matched with the base in a threaded mode, an adjusting gasket is arranged between the base and the positioning end, and a groove matched with the rear axle housing is formed in the upper side of the positioning end.
Further: the driving mechanism comprises a speed reducer fixed on the main body through a planetary speed reducer mounting bracket and a servo motor arranged on the main body through a mounting plate, wherein the output end of the servo motor is matched with the input end of the speed reducer through a first synchronous belt wheel, a synchronous belt and a second synchronous belt wheel, and the output end of the speed reducer is matched with the end part of the lead screw through a first belt wheel and a belt.
Further: the second mounting plate is further provided with a first linear sliding rail, and the first linear sliding rail is provided with a travel switch.
Further: and the welding gun is matched with the support connecting plate through the three-dimensional fine adjustment support.
The utility model has the advantages and positive effects that: because the utility model discloses a set up the structural second mounting panel that is used for the rear-axle housing to smooth the alignment of major structure and is used for installing the sliding walking of welder support. Accurate with the rear axle housing of first mounting panel fixes a position, still is in the horizontality after the alignment support restriction rear axle housing upset of can leveling. The second mounting plate ensures that a linear slide rail and a slide rail in the nut sliding mechanism drive the welding gun lifting mechanism to stably travel, and a straight shank automatic MAG welding gun in the welding system is firmly fixed on the welding gun lifting mechanism through a mounting bracket; the welding machine overcomes the defects that a plurality of procedures are welded simultaneously in the original machining mode, the procedures are multiple, the occupied area is large, and the number of the middle circulation processes of the rear axle housing is large. Meanwhile, the problem that the equipment investment cost is very high when the robot automatically welds in the advanced machining mode to complete the welding of 4 straight welding seams at the same station is solved. The utility model discloses can accomplish the automatic weld of 4 straight weld joints on same device, less equipment area reduces the transport of part intermediate process, and the saving equipment cost of while to a great extent drops into. Its structural design is reasonable, and process flow simplifies, easy operation, and the automatic weld of all straight weld joints can be accomplished in single work piece upset, and the alignment support of can leveling simultaneously can guarantee that the rear-axle housing body is in the horizontality. Therefore, the utility model provides a two side straight weld welding process processes of current automobile rear-axle housing many, production efficiency is low, and equipment cost drops into greatly, problem that welding process ability index is low.
Drawings
The technical solution of the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the vertical moving unit of the present invention;
fig. 3 is a schematic structural view of the leveling and aligning bracket of the present invention;
fig. 4 is a schematic structural diagram of the driving mechanism of the present invention.
The sequence numbers in the figures illustrate: 1 welding power supply, 2 driving mechanisms, 3 wire feeding mechanisms, 4 fixed ends, 5 nut sliding mechanisms, 6 vertical moving units, 7 welding guns, 8 lead screws, 9 supporting ends, 10 second mounting plates, 11 first linear sliding rails, 12 travel switches, 13 three-dimensional fine adjustment supports, 14 button control boxes, 15 general control cabinets, 16V-shaped positioning supports, 17 adjustable leveling and aligning supports, 18 axial limiting plates, 19 first mounting plates, 20 main bodies, 21 cylinders, 22 cylinder connecting plates, 23 second sliding blocks, 24 second sliding rails, 25 support connecting plates, 26 positioning ends, 27 adjusting gaskets, 28 bases, 29 second synchronous belt wheels, 30 speed reducers, 31 first belt pulleys, 32 speed reducer mounting supports, 33 mounting plates, 34 servo motors, 35 first synchronous belt wheels and 36 synchronous belts.
Detailed Description
The specific structure of the present invention is described in detail with reference to fig. 1 to 4. An automatic welding device for straight welding seams at two sides of a rear axle housing of an automobile,
the welding gun comprises a main body 20, a horizontal moving unit, a vertical moving unit 6, a welding gun 7 and a supporting and positioning unit matched with a rear axle housing;
the main body structure is formed by splicing and welding 10# channel steel, is a frame formed by upright posts, cross beams and the like, and is provided with a first mounting plate 19 and a second mounting plate 10;
the two groups of horizontal moving units are symmetrically arranged on the second mounting plate, each group of horizontal moving units comprises a lead screw 8 (the lead screw is a ball screw) and a nut sliding mechanism 5 matched with the lead screw, two ends of the lead screw are respectively matched with a fixed end 4 and a supporting end 9 arranged on the second mounting plate, so that the lead screw can rotate in the lead screw, and one end of the lead screw extends outwards to extend out of the fixed end 4 and is matched with the driving mechanism 2, and is in transmission connection through a belt pulley and a belt;
the vertical moving unit comprises an air cylinder 21 connected with the nut sliding mechanism, an L-shaped air cylinder connecting plate 22 fixed on the air cylinder body and an L-shaped support connecting plate 25 connected with the free end of the air cylinder, and a second sliding rail 24 and a second sliding block 23 which are matched with each other are respectively arranged on the air cylinder connecting plate 22 and the support connecting plate 25; the free end can run more stably and accurately; the upper end of the cylinder connecting plate 22 is welded and fixed with the cylinder body, the side surface is welded or screwed and fixed with the nut sliding mechanism (or the nut), the upper part of the bracket connecting plate 25 is screwed and matched with the free end of the cylinder, one side of the side surface is matched with the cylinder connecting plate 22 through a slide rail and slide block structure, and the other side of the side surface is fixed with a welding gun or fixedly connected with the welding gun through a three-dimensional fine adjustment bracket;
the welding gun is arranged on the support connecting plate, can be directly connected in a threaded manner, and is preferably matched with the support connecting plate through a three-dimensional fine adjustment support 13, the three-dimensional fine adjustment support is a commercially available product, fine adjustment of the position of the welding gun can be realized, so that the welding gun is accurately fixed, and the welding gun is well matched with a part to be welded; one side of the main body is also provided with a wire feeding mechanism 3 matched with the welding gun and used for feeding welding wires to the welding gun;
the supporting and positioning unit comprises a V-shaped positioning bracket 16, an adjustable leveling and aligning bracket 17 and an axial limiting plate 18, wherein the V-shaped positioning bracket 16 is arranged on the first mounting plate and matched with the rear axle housing; the two V-shaped positioning brackets are arranged on the left side and the right side in the figure 1, are respectively matched with two ends of the rear axle housing, support the whole rear axle housing and protect the rear axle housing from being horizontal in the left-right direction; the adjustable leveling and aligning support is located on the lower side of the rear axle housing and used for preventing the rear axle housing from deflecting and enabling the rear axle housing to be horizontal in the radial direction (the front and rear directions in the figure 1), and the adjustable leveling and aligning support achieves different heights through adjusting gaskets with different thicknesses. The adjustable leveling and aligning support and the two V-shaped positioning supports are not in the same straight line, so that the rear axle housing can be stably positioned. The axial limiting plate is fixed on the second mounting plate and matched with the end part of the rear axle housing to achieve the effect of axial positioning and limiting.
Preferably: the adjustable leveling and aligning support comprises a base 28 and a positioning end 26 matched with the base in a threaded mode, an adjusting gasket 27 is arranged between the base 28 and the positioning end 26, the adjusting gasket is provided with a plurality of different thicknesses and can be selected as required, and the upper side of the positioning end is matched with a rear axle housing.
Preferably: the driving mechanism 2 comprises a speed reducer 30 fixed on the main body through a planetary speed reducer mounting bracket 32 and a servo motor 34 arranged on the main body through a mounting plate 33, wherein the output end of the servo motor is matched with the input end of the speed reducer through a first synchronous belt pulley 35, a synchronous belt 36 and a second synchronous belt pulley 29, and the output end of the speed reducer is matched with the end part of a lead screw provided with a belt pulley through a first belt pulley 31 and a belt.
Preferably: the second mounting plate is further provided with a first linear slide rail 11, a first slide block matched with the screw sliding mechanism is fixedly welded or screwed on the lower side of the screw sliding mechanism, and the first linear slide rail is further provided with a high-precision travel switch 12 for limiting.
Preferably: the welding gun is matched with the support connecting plate through the three-dimensional fine adjustment support 13.
The present invention will be described in detail below.
In the automatic welding device for the straight welding seams on the two sides of the rear axle housing of the automobile, a main body is formed by splicing and welding 10# channel steel and comprises stand columns, cross beams and reinforcing ribs. The main body structure is connected with a first mounting plate and a second mounting plate which are processed through fine grinding on the surfaces through bolts. First mounting panel is provided with two T type grooves that lead to long being used for mounting bolt and one along the axial direction and guarantees the spacing direction keyway of axial direction, rear-axle housing body smooths alignment mechanism and utilizes T type groove bolt-up on first mounting panel 19 through the direction key location. The flattening positioning mechanism comprises an adjustable flattening and aligning support 17 for ensuring that the rear axle housing is in a horizontal state and a supporting and positioning unit for determining that the axis center height of the rear axle housing is in a horizontal state and limiting in the axial direction. Support the positioning unit and pass through the bolt fastening on first mounting panel to can follow the adjustment of direction keyway direction in order to adapt to the rear-axle housing of different length, support the positioning unit and constitute by V type locating support 16 and axial limiting plate 18, V type locating support 16 has not unidimensional multistage, and the accessible is changed and is adapted to the rear-axle housing body central height direction location of 60-100 diameters, and axial limiting plate 18 restricts the axial displacement of rear-axle housing.
The adjustable leveling and aligning support 17 comprises a positioning end 26 subjected to surface heat treatment, adjusting gaskets 27 with different thicknesses, a base 28 subjected to finish machining treatment and the like, and the rear axle housing bodies with different axial center heights can be guaranteed to be in a horizontal state through the thickness adjustment of the adjusting gaskets 27 by the adjustable leveling and aligning support 17.
And the ball screw connecting fixed end, the ball screw connecting supporting end and the high-precision travel limit switch are symmetrically arranged on the left side and the right side of the second mounting plate. The nut sliding mechanism is composed of a first linear slide rail installed on the second installation plate, a slide block matched with the first linear slide rail for use, and a nut matched with the ball screw 8 for use, the nut is installed inside the nut sliding mechanism and connected with the welding gun lifting mechanism, and the nut slides on the ball screw fixed through the ball screw connection fixed end and the ball screw connection supporting end in a reciprocating mode.
The welding gun lifting mechanism comprises a cylinder, a cylinder connecting plate, a three-dimensional fine adjustment support connecting plate and the like, wherein the cylinder is used for controlling the mechanism to lift. The cylinder is fixed with a cylinder connecting plate which is provided with a second linear sliding rail for surface finish grinding treatment through a bolt, and a cylinder rod of the cylinder is fixed with a three-dimensional fine-tuning support connecting plate which is provided with a second linear sliding block for surface finish grinding treatment.
And a three-dimensional fine tuning support connecting plate of the welding gun lifting mechanism is fixed with a three-dimensional fine tuning support of the fixed straight shank automatic MAG welding gun. The cylinder drives the three-dimensional fine tuning support connecting plate under the control of the master control cabinet, so that the three-dimensional fine tuning support sends the automatic MAG welding gun with the straight shank to a working position. The special proximity switch is arranged on the air cylinder, the PLC in the master control cabinet receives the signal feedback of the proximity switch through a signal wire and then detects whether the straight shank automatic MAG welding gun reaches a preset position, and the equipment cannot continue to work when the straight shank automatic MAG welding gun does not reach the preset position.
The driving mechanism comprises a servo motor, a planetary reducer, a synchronous belt, a first synchronous belt wheel, a second synchronous belt wheel, a first belt wheel and the like. The servo motor is used as a power source of the numerical control driving mechanism and is connected with a planetary reducer which reduces the rotating speed and increases the torque speed ratio to be 1:30 through a synchronous belt, a first synchronous belt wheel and a second synchronous belt wheel which guarantee synchronous operation. The other end of the planetary reducer is connected with the ball screw through a first belt pulley and a belt. The servo motor transmits kinetic energy to the planetary reducer through the synchronous belt which is stable in transmission, and the planetary reducer drives the ball screw through the belt.
The walking termination of the screw sliding mechanism and the arc starting and arc stopping of the welding system are controlled by a high-precision travel limit switch which is arranged on the support and controlled by a master control cabinet. The high-precision travel limit switch can be adjusted and fixed through the walking direction of the welding gun, so that the welding starting position and the welding ending position are controlled, and the welding gun is suitable for welding straight welding seams with different lengths.
The specific operation process of the structure is as follows:
the rear axle housing body is flatly positioned on the V-shaped positioning support, the adjustable flatting alignment support and the axial limiting plate in the positioning mechanism and is completely cleaned up with the rear axle housing body, the rear axle housing body is placed on the V-shaped positioning support, the left side of the rear axle housing body is attached to the axial limiting plate on the first mounting plate, and therefore the rear axle housing body is controlled to be axially limited, and the adjustable flatting alignment support on the first mounting plate is attached to the axle housing body to ensure that the rear axle housing body is in a horizontal state. And starting a starting button on the button control box 14, moving the straight-shank automatic MAG welding gun to a specified position under the action of a cylinder in the welding gun lifting mechanism, starting the rotation of a ball screw under the action of a power source servo motor in the numerical control driving mechanism, driving a nut sliding mechanism to linearly and uniformly move from the middle to two sides along the direction of a welding seam, and starting arc starting welding by a welding power supply 1 and a wire feeding mechanism in a welding system. The rear axle housing body is turned 180 deg. while being positioned axially and horizontally by the above method. The straight shank automatic MAG welding gun moves to the designated position again under the action of a cylinder in the welding gun lifting mechanism, the ball screw starts to rotate under the action of the servo motor, the nut sliding mechanism is driven to linearly move at a constant speed from the middle to two sides along the direction of a welding seam, and meanwhile, the welding system starts to perform arc starting welding. When the straight-shank automatic MAG welding gun moves to a specified position and touches a high-precision travel limit switch controlled by the master control cabinet 15, the welding system stops welding, and the straight-shank automatic MAG welding gun is reset under the driving of the cylinder to complete the automatic welding of the double-sided straight welding seam. And manually taking down the workpiece.
The utility model discloses a set up the second mounting panel that is used for rear-axle housing to smooth the alignment on the major structure and is used for installing the sliding walking of welder support. Accurate with the rear axle housing of first mounting panel fixes a position, still is in the horizontality after the alignment support restriction rear axle housing upset of can leveling. The second mounting plate ensures that a linear slide rail and a slide rail in the nut sliding mechanism drive the welding gun lifting mechanism to stably travel, and a straight shank automatic MAG welding gun in the welding system is firmly fixed on the welding gun lifting mechanism through a mounting bracket; the problem of a plurality of processes of original processing mode welded simultaneously, the process is many, and area is big and the middle circulation process of rear-axle housing is many is overcome. Meanwhile, the problem that the equipment investment cost is very high when the robot automatically welds in the advanced machining mode to complete the welding of 4 straight welding seams at the same station is solved. The utility model discloses only need the upset once can accomplish the automatic weld of 4 straight weld on same device, reduce equipment area, reduce the transport of part middle process, the saving equipment cost of limit drops into simultaneously greatly. Its structural design is reasonable, and process flow simplifies, easy operation, and the automatic weld of all straight weld joints can be accomplished in single work piece upset, and the alignment support of can leveling simultaneously can guarantee that the rear-axle housing body is in the horizontality. Therefore, the utility model provides a two side straight weld welding process processes of current automobile rear-axle housing many, production efficiency is low, and equipment cost drops into greatly, problem that welding process ability index is low.
Claims (5)
1. The utility model provides a two side straight weld automatic welder of car rear-axle housing which characterized in that:
the welding machine comprises a main body (20), a horizontal moving unit, a vertical moving unit (6), a welding gun (7) and a supporting and positioning unit matched with a rear axle housing; the main body is a frame consisting of upright posts and cross beams, and a first mounting plate (19) and a second mounting plate (10) are arranged on the main body;
the two groups of horizontal moving units are symmetrically arranged on the second working table surface, each group of horizontal moving units comprises a lead screw (8) and a nut sliding mechanism (5) matched with the lead screw, two ends of the lead screw are respectively matched with a fixed end (4) and a supporting end (9) which are arranged on the second mounting plate, and one end of the lead screw penetrates through the fixed end (4) and is matched with the driving mechanism (2);
the vertical moving unit comprises an air cylinder (21) matched with the nut sliding mechanism, an L-shaped air cylinder connecting plate (22) fixed on the air cylinder body and an L-shaped support connecting plate (25), and a second sliding rail (24) and a second sliding block (23) which are matched with each other are respectively arranged on the air cylinder connecting plate (22) and the support connecting plate (25);
the welding gun is arranged on the support connecting plate, and one side of the main body is also provided with a wire feeding mechanism (3) matched with the welding gun;
support the positioning unit including set up on first mounting panel with rear-axle housing matched with V type locating support (16), with rear-axle housing downside matched with can smooth alignment support (17) and with rear-axle housing tip matched with axial limiting plate (18).
2. The automatic welding device for the straight welding seams on the two sides of the automotive rear axle housing, as recited in claim 1, is characterized in that: the adjustable leveling and aligning support comprises a base (28) and a positioning end (26) matched with the base in a threaded mode, an adjusting gasket (27) is arranged between the base (28) and the positioning end (26), and the upper end face of the positioning end is matched with a rear axle housing.
3. The automatic welding device for the straight welding seams on the two sides of the automotive rear axle housing, as recited in claim 1, is characterized in that: actuating mechanism (2) include fix speed reducer (30) in the main part and set up servo motor (34) in the main part through mounting panel (33) through planetary reducer installing support (32), and the servo motor output cooperatees with the input of speed reducer through first synchronous pulley (35), hold-in range (36) and second synchronous pulley (29), and the output of speed reducer cooperatees with the tip of lead screw through first belt pulley (31) and belt.
4. The automatic welding device for the straight welding seams on the two sides of the automotive rear axle housing, as recited in claim 1, is characterized in that: the second mounting plate is further provided with a first linear sliding rail (11), and a travel switch is arranged on the first linear sliding rail.
5. The automatic welding device for the straight welding seams on the two sides of the automotive rear axle housing, as recited in claim 1, is characterized in that: the welding gun is matched with the support connecting plate through a three-dimensional fine adjustment support (13).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201922276887.8U CN211539878U (en) | 2019-12-18 | 2019-12-18 | Automatic welding device for straight welding seams on two sides of automobile rear axle housing |
Applications Claiming Priority (1)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110948093A (en) * | 2019-12-18 | 2020-04-03 | 辽宁曙光汽车集团股份有限公司 | Automatic welding device for straight welding seams on two sides of automobile rear axle housing |
CN115194305A (en) * | 2022-08-11 | 2022-10-18 | 林永耿 | Plasma arc welding machine |
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2019
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110948093A (en) * | 2019-12-18 | 2020-04-03 | 辽宁曙光汽车集团股份有限公司 | Automatic welding device for straight welding seams on two sides of automobile rear axle housing |
CN115194305A (en) * | 2022-08-11 | 2022-10-18 | 林永耿 | Plasma arc welding machine |
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