CN115673509A - Multipoint spot welding direct-current spot welding machine with automatic feeding function - Google Patents
Multipoint spot welding direct-current spot welding machine with automatic feeding function Download PDFInfo
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- CN115673509A CN115673509A CN202211742486.7A CN202211742486A CN115673509A CN 115673509 A CN115673509 A CN 115673509A CN 202211742486 A CN202211742486 A CN 202211742486A CN 115673509 A CN115673509 A CN 115673509A
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Abstract
The invention discloses a multi-point spot welding direct-current spot welding machine with an automatic feeding function, and relates to the technical field of direct-current spot welding, wherein the direct-current spot welding machine comprises a workbench and a bracket, feeding rollers are arranged on two sides of the workbench, the bracket is arranged between the two feeding rollers, an upper welding frame is arranged on the bracket, and a lower welding frame is rotatably arranged at a position right below the upper welding frame above the workbench; the side plates are installed on two sides of the feeding roller, the feeding motor is installed on a roller shaft of the feeding roller and installed on one side plate, and a ring groove is machined in the middle of the feeding roller. The feed roll rotates under the drive of a feed motor, the feed roll sends a plate-shaped workpiece to be machined to a position between an upper welding frame and a lower welding frame, or sends a columnar workpiece to be machined to a position between the upper welding frame and the lower welding frame, a ring groove in the feed roll is used for placing the columnar workpiece to be machined, the feed roll feeds the columnar workpiece to be machined by utilizing the ring groove, and the workpiece to be machined is conveyed to a position between the upper welding frame and the lower welding frame.
Description
Technical Field
The invention relates to the technical field of direct current spot welding, in particular to a multipoint spot welding direct current spot welder with an automatic feeding function.
Background
The spot welding machine adopts the principle of double-sided two-point overcurrent welding, when the spot welding machine works, external force is applied to two workpieces, a certain contact resistance is formed between the workpieces, welding current flows into the other electrode from one electrode after flowing through the contact surfaces of the two workpieces, instant heat welding is formed when the welding current passes through the contact resistance points of the two workpieces, and under the welding mode of spot welding, a loop is only formed between the two electrodes and the two workpieces, so that the internal structure of the welded workpieces is not damaged.
When the existing spot welding machine is used for welding, only single spot welding can be realized, namely only one hot spot welding point can be formed during each welding, and the number of the hot spot welding points formed during each welding is small, so that the welding frequency of workpieces is large, and the welding efficiency is low; and the existing spot welding machine can only weld two superposed workpieces, can not well process the two workpieces in a parallel state, and has small application range.
Disclosure of Invention
The invention aims to provide a multi-point spot welding direct current spot welding machine with an automatic feeding function, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a multi-point spot welding direct current spot welder with an automatic feeding function comprises a workbench and a support, wherein feeding rollers are arranged on two sides of the workbench, the support is arranged on the workbench, auxiliary rollers are arranged on the support corresponding to the two feeding rollers, a working cylinder is arranged below the upper end of the support, telescopic guide rods are arranged on two sides of the working cylinder, a bottom plate is arranged on each telescopic guide rod, an output shaft of the working cylinder is connected with the bottom plate, an upper welding frame is arranged below the bottom plate, and a lower welding frame is rotatably arranged at a position above the workbench and right below the upper welding frame;
the side plates are installed on two sides of the feeding roller, the feeding motor is installed on a roller shaft of the feeding roller and installed on one side plate, and a ring groove is machined in the middle of the feeding roller. The auxiliary roller and the feed roller are mutually matched to convey the workpiece to be machined, the feed roller is driven by a feed motor to rotate, the workpiece to be machined is conveyed between an upper welding frame and a lower welding frame, one end of the workpiece to be machined is arranged on a bearing column at the central position of the lower welding frame, the feed roller is used for realizing automatic feeding, a working cylinder is a hydraulic cylinder and pushes the upper welding frame downwards through a bottom plate, two ends of the upper welding frame are respectively supported on two workpieces to be machined, a telescopic guide rod moves and leads the bottom plate, the upper welding frame and the lower welding frame are mutually matched, and the direct current is utilized to carry out spot welding on the two workpieces to be machined. The feeding roller conveys the plate-shaped workpiece to be machined between the upper welding frame and the lower welding frame or conveys the columnar workpiece to be machined between the upper welding frame and the lower welding frame, the annular groove in the middle of the feeding roller is used for placing the columnar workpiece to be machined, and the feeding roller conveys the columnar workpiece to be machined by utilizing the annular groove.
The upper welding frame and the lower welding frame are identical in structure and arrangement;
the upper welding frame comprises a case and two L-shaped welding shafts, a rotating disc is mounted inside the upper end of the case, the output end of the rotating disc is located on the outer side of the case, the output end of the rotating disc is connected with a bottom plate through a flange plate, an axle box is mounted below the case, one end of each welding shaft is slidably mounted in the axle box, a driving mechanism is arranged in the case, the driving mechanism enables the two welding shafts to extend out of or retract back from the axle box, a welding column is mounted at the other end of each welding shaft, and the welding columns are connected with electrodes of a direct-current power supply through a control system;
and the lower end of the middle part of the axle box is rotatably provided with a bearing column. The chassis provides support for the installation of the control system, the driving mechanism and the rotating disk, the control system enables the two welding columns to be respectively connected with the positive electrode and the negative electrode of the direct current, and the direct current flows in the two workpieces to be processed under the control of the control system, so that the spot welding of the workpieces to be processed is realized; the rotary disc is connected with a control system, the rotary disc is used for adjusting the rotation angle of the chassis, so that the chassis drives the axle box to rotate, the position of a welding column on a workpiece to be welded is further adjusted, when the upper welding frame and the lower welding frame are matched with each other to compress the workpiece to be machined, two ends of the upper welding frame/the lower welding frame are respectively abutted against the two workpieces to be machined, the upper welding frame and the lower welding frame are in a crossed state (the crossed state is only generated when the plate-shaped workpiece to be machined is welded), before welding, the rotary disc on the upper welding frame and the rotary disc on the lower welding frame rotate simultaneously and rotate in opposite directions, two welding shafts on the upper welding frame and two welding shafts on the lower welding frame are close to each other, and then the two workpieces to be welded are mutually extruded under the mutual matching of the upper welding frame and the lower welding frame, so that sufficient welding pressure is kept between the two workpieces to be welded, and an additional mechanism for pressing and maintaining pressure of the workpieces to be welded is omitted through the arrangement of the upper welding frame and the lower welding frame, so that the whole spot welding machine is simpler in structure and the use cost is reduced; the rotating disc rotates, so that the upper welding frame/the lower welding frame generate acting forces in two directions on the two workpieces to be processed, one acting force enables the two workpieces to be processed to mutually deviate along the binding surface, the other acting force enables the two workpieces to be processed to be pressed towards the binding surface, and the rotating directions of the rotating disc on the upper welding frame and the rotating disc on the lower welding frame are opposite, so that the acting forces which are applied to the two workpieces to be processed by the upper welding frame and the lower welding frame and enable the two workpieces to be processed to mutually deviate are mutually offset, and the two workpieces to be processed are only pressed towards the binding surface. One end of the welding shaft can be retracted into the axle box or extend out of the axle box, the two welding shafts can be retracted into the axle box or extend out of the axle box, the distance between the two welding columns can be adjusted, the two welding shafts on the upper welding frame and the two welding shafts on the lower welding frame can be adjusted synchronously at the same distance, the two welding columns can be welded at different point positions, and multi-point welding is achieved. The bearing column is used for bearing one end of a plate-shaped or columnar workpiece to be processed. Two welding columns on the upper welding frame/the lower welding frame, one is connected with a direct-current power supply anode, the other is connected with a direct-current power supply cathode, the welding column connected with the anode on the upper welding frame and the welding column connected with the cathode on the lower welding frame are mutually matched for welding, the welding column connected with the anode on the upper welding frame and the welding column connected with the cathode on the lower welding frame respectively contact different workpieces to be machined, and the welding column connected with the cathode on the upper welding frame and the welding column connected with the anode on the lower welding frame are mutually matched for welding the two workpieces to be machined; the two welding columns on the upper welding frame/the lower welding frame are not electrified simultaneously. The welding of two welding spots can be realized at one time through the arrangement of the upper welding frame and the two welding columns on the lower welding frame.
The driving mechanism comprises a driving motor arranged in the chassis and two clamping plates symmetrically arranged in the axle box, bevel gears are rotatably arranged at the middle positions of the two clamping plates, a transmission shaft is arranged at the output end of the driving motor, auxiliary bevel gears are arranged on the transmission shaft and are in meshed transmission with the two bevel gears, and a hollow screw rod is arranged at the central position of each bevel gear;
an adjusting plate is mounted at one end of each welding shaft, and one end of the hollow lead screw penetrates through the adjusting plate and is in threaded transmission with the adjusting plate;
and a clamping strip is arranged at the bottom of the axle box, and the adjusting plate slides on the clamping strip. Driving motor passes through the transmission axle, assists the bevel gear with power transmission to the bevel gear on, and then makes hollow screw rotatory, and the card strip is spacing to the adjusting plate, prevents that the adjusting plate from following hollow screw rotatory, and under hollow screw's drive, two welding shafts are close to each other or two are kept away from. And under the condition that the two welding shafts are close to or far away from each other, the welding of different positions of two workpieces to be machined is realized.
Each welding shaft is of a hollow structure, a piston is installed in one end, in the vertical state, of each welding shaft, an end plate is installed at one end, in the vertical state, of each welding shaft, a spring is arranged between the end face, in the inner side, of each welding shaft, of each installation end plate and the piston, each welding column is installed on the piston, and one end of each welding column penetrates through the welding shafts and the end plates;
the inner space intercommunication of hollow lead screw welds the inner space of axle, two install the sleeve pipe between the hollow lead screw, sheathed tube lower extreme is fixed with the extension board, extension board one end is fixed on axle box inner wall, move sealing connection between sleeve pipe and the transmission axle, the transmission axle is hollow tube structure, and transmission axle and driving motor's output junction cover are equipped with the feed liquor pipe, and the transmission axle is located the inside one end of feed liquor pipe and is provided with the feed liquor branch pipe, the feed liquor branch pipe makes transmission axle inner space intercommunication feed liquor intraductal space, feed liquor pipe one side intercommunication has the conveyer pipe, hydraulic system is connected to the conveyer pipe. The upper welding frame and the lower welding frame are abutted against the workpieces to be machined through the end plates, the upper welding frame and the lower welding frame are matched with each other to apply acting force to the two workpieces to be machined, so that when the two workpieces to be machined are extruded mutually, under the action of a spring to a piston, the end face of one end of the welding column is not contacted with the surfaces of the workpieces to be machined; when welding is needed, the hydraulic system pumps hydraulic oil, the hydraulic oil enters the welding shaft through the transmission shaft, the sleeve and the hollow screw rod, the hydraulic oil extrudes the piston, the welding column is abutted to a workpiece to be machined, and the welding column on the upper welding frame and the welding column on the lower welding frame are mutually matched to realize direct-current spot welding of the workpiece to be machined.
A column groove is formed in one end, in a vertical state, of the welding shaft in the radial direction, slide rails are symmetrically formed in the column groove, inner balls are slidably mounted in the slide rails, the inner balls are connected with cricket through branch pipes, and the cricket is rotatably mounted in an end plate;
and an avoiding groove is radially arranged on the end surface of the end plate, which is far away from the plate ball, the opening direction of the avoiding groove is perpendicular to the opening direction of the sliding rail, and a round angle is processed at the central position of the end plate.
And a soft magnetic ring is embedded on the end surface of the end plate, which is far away from the welding shaft. The soft magnetic ring enables the end plate to be quickly attached to a workpiece to be machined.
Two cold liquid pipes are arranged in the welding shaft, one end of each cold liquid pipe passes through the hollow screw rod and penetrates through the sleeve, and the cold liquid pipes are connected with the cooling circulation system;
the inner ball and the plate ball are hollow and communicated through the branch pipe, a cooling groove is formed in the end plate, and two ends of the cooling groove are communicated with the inner spaces of the two plate balls respectively. Cooling circulation system pours into the coolant liquid toward the liquid cooling pipe, and the coolant liquid enters into the cooling bath of end plate through interior ball, branch pipe and board ball, and the welding column during operation, the position that the machined part and welding column contact can be treated to the end plate cools down, and then reduces the heat on the welding column, simultaneously through treating the machined part and cooling down, can make the heat conduction on the welding column to treating on the machined part, very big reduction the heat that the welding column during operation had.
Compared with the prior art, the invention has the following beneficial effects:
1. when the platy workpiece to be machined is welded, the upper welding frame and the lower welding frame are in a cross state, before the workpiece is not welded, the rotating disk on the upper welding frame and the rotating disk on the lower welding frame rotate simultaneously and rotate in opposite directions, two welding shafts on the upper welding frame and two welding shafts on the lower welding frame are close to each other, and then the two workpieces to be machined are mutually extruded under the mutual matching of the upper welding frame and the lower welding frame, enough welding pressure is kept between the two workpieces to be machined, through the arrangement of the upper welding frame and the lower welding frame, an additional mechanism for applying pressure and maintaining pressure to the workpieces to be machined is omitted, the structure of the whole spot welding machine is simpler, and the use cost is reduced.
2. The annular is seted up at the feed roll middle part, and the feed roll not only can be used for carrying platelike the machined part of treating, also can utilize the annular to carry the columnar machined part of treating, sets up through simple structure, is that the feed roll realizes carrying the machined part of treating of different shapes, has realized the multi-purpose effect of a roller, has reduced and has carried the used structure or the mechanism of different shapes treating the machined part, has reduced use cost, and is convenient for maintain and change.
3. The welding column connected with the anode on the upper welding frame and the welding column connected with the cathode on the lower welding frame are mutually matched for welding, the welding column connected with the anode on the upper welding frame and the welding column connected with the cathode on the lower welding frame are respectively contacted with different workpieces to be machined, and the welding column connected with the cathode on the upper welding frame and the welding column connected with the anode on the lower welding frame are mutually matched for welding the two workpieces to be machined; the two welding columns on the upper welding frame/the lower welding frame are not electrified simultaneously. The welding of two welding spots can be realized at one time through the arrangement of the upper welding frame and the two welding columns on the lower welding frame.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a front elevational view of the overall construction of the present invention;
FIG. 2 is a right side view of the overall structure of the present invention;
FIG. 3 is a schematic view of the upper welding frame and the lower welding frame of the present invention cooperating with spot welding of a plate-like workpiece to be processed;
FIG. 4 is a top perspective view of the upper weld holder of the present invention;
FIG. 5 is a bottom perspective view of the upper weld holder of the present invention;
FIG. 6 is a cross-sectional view of the area B-B of FIG. 4 in accordance with the present invention;
FIG. 7 is a front view of the upper weld carriage of the present invention;
FIG. 8 is a cross-sectional view taken in the direction E-E of FIG. 7 in accordance with the present invention;
FIG. 9 is an enlarged fragmentary view of area A of FIG. 8 in accordance with the present invention;
FIG. 10 is a right side view of the upper weld carriage of the present invention;
FIG. 11 is a cross-sectional view taken in the direction D-D of FIG. 10 in accordance with the present invention;
figure 12 is a front view of the interior of the axle housing of the present invention.
In the figure:
1. a work table;
2. a feed roller; 201. a ring groove;
3. a support;
4. a working cylinder;
5. mounting a welding frame;
501. a chassis;
502. an axle box; 5021. clamping a plate; 5022. a bevel gear; 5023. a hollow lead screw; 5024. a transmission shaft; 5025. a sleeve; 5026. a liquid inlet pipe; 5027. a delivery pipe; 5028. a piston; 5029. a cold liquid pipe;
503. welding a shaft; 5031. a slide rail; 5032. an inner ball; 5033. cricket; 5034. an adjusting plate;
504. a load bearing column;
505. an end plate; 5051. an avoidance groove; 5052. round corners;
506. a soft magnetic ring; 507. rotating the disc; 508. a column groove; 509. a drive motor;
6. a lower welding frame;
7. a workpiece to be processed;
8. and (7) welding the columns.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 12, the present invention provides a technical solution: a multipoint spot welding direct current spot welder with an automatic feeding function comprises a workbench 1 and a bracket 3, wherein feeding rollers 2 are arranged on two sides of the workbench 1, the bracket 3 is arranged on the workbench 1, auxiliary rollers are arranged on the bracket 3 corresponding to the positions of the two feeding rollers 2, a working cylinder 4 is arranged below the upper end of the bracket 3, telescopic guide rods are arranged on two sides of the working cylinder 4, a bottom plate is arranged on each telescopic guide rod, an output shaft of the working cylinder 4 is connected with the bottom plate, an upper welding frame 5 is arranged below the bottom plate, and a lower welding frame 6 is rotatably arranged at a position right below the upper welding frame 5 above the workbench 1;
the lateral plates are arranged on two sides of the feeding roller 2, the feeding motor is arranged on a roller shaft of the feeding roller 2, the feeding motor is arranged on one of the lateral plates, and a ring groove 201 is machined in the middle of the feeding roller 2. The auxiliary roller and the feed roller 2 are mutually matched to treat a workpiece 7 to be fed, the feed roller 2 is driven by a feed motor to rotate, the workpiece 7 is to be conveyed to an upper welding frame 5 and a lower welding frame 6, one end of the workpiece 7 is to be lapped on a bearing column at the central position of the lower welding frame 6, the feed roller 2 is used for realizing automatic feeding, a working cylinder 4 is a hydraulic cylinder, the working cylinder 4 pushes the upper welding frame 5 downwards through a bottom plate, two ends of the upper welding frame 5 are supported on two workpieces 7 to be fed respectively, a telescopic guide rod moves and guides the bottom plate, the upper welding frame 5 is mutually matched with the lower welding frame 6, and the two workpieces 7 to be fed are subjected to spot welding by direct current. The feeding roller 2 sends the plate-shaped workpiece 7 to be processed between the upper welding frame 5 and the lower welding frame 6, or sends the columnar workpiece 7 to be processed between the upper welding frame 5 and the lower welding frame 6, the annular groove in the middle of the feeding roller 2 is used for placing the columnar workpiece 7 to be processed, and the feeding roller 2 feeds the columnar workpiece 7 to be processed by utilizing the annular groove 201.
The upper welding frame 5 and the lower welding frame 6 have the same composition structure and the same structure arrangement, and because the upper welding frame 5 and the lower welding frame 6 are arranged in the same way, in the embodiment, only the structure position arrangement and the connection arrangement of the upper welding frame 5 are described, and the arrangement of the lower welding frame 6 will not be described;
the upper welding frame 5 comprises a case 501 and two L-shaped welding shafts 503, a rotating disc 507 is mounted inside the upper end of the case 501, the output end of the rotating disc 507 is positioned outside the case 501, the output end of the rotating disc 507 is connected with a bottom plate by a flange plate, an axle box 502 is mounted below the case 501, one end of each welding shaft 503 is slidably mounted in the axle box 502, a driving mechanism is arranged in the case 501, the driving mechanism enables the two welding shafts 503 to extend out of or retract back from the axle box 502, a welding column 8 is mounted at the other end of each welding shaft 503, and the welding column 8 is connected with an electrode of a direct-current power supply through a control system;
the lower end of the axle box 502 is rotatably mounted with a load post 504. The chassis 501 provides support for installation of the control system, the driving mechanism and the rotating disk 507, the control system enables the two welding columns 8 to be respectively connected with the positive electrode and the negative electrode of the direct current, and the direct current flows in the two workpieces to be processed 7 under the control of the control system, so that spot welding of the workpieces to be processed 7 is realized; the rotating disc 507 is connected with the control system, the rotating disc 507 is used for adjusting the rotation angle of the case 501, so that the case 501 drives the axle box 502 to rotate, and further the position of the welding column 8 on the workpiece 7 to be machined is adjusted, when the upper welding frame 5 and the lower welding frame 6 are matched with each other to press the workpiece 7 to be machined, two ends of the upper welding frame 5/the lower welding frame 6 are respectively abutted against the two workpieces 7 to be machined, the upper welding frame 5 and the lower welding frame 6 are in a cross state, the upper welding frame 5 and the lower welding frame 6 are abutted against the workpiece 7 to be machined and before welding, the rotating disc on the upper welding frame 5 and the rotating disc on the lower welding frame 6 rotate simultaneously and rotate in opposite directions, so that two welding shafts on the upper welding frame 5 and two welding shafts on the lower welding frame 6 are close to each other, and further the two workpieces 7 to be machined are mutually extruded under the mutual matching of the upper welding frame 5 and the lower welding frame 6, and a sufficient welding pressure is kept between the two workpieces 7 to be machined; because the rotating disk rotates, the upper welding frame 5/the lower welding frame 6 generates acting forces in two directions on the two workpieces to be processed 7, one acting force enables the two workpieces to be processed 7 to deviate from each other along the joint surface, the other acting force enables the two workpieces to be processed 7 to be pressed towards the joint surface, and because the rotating disk on the upper welding frame 5 and the rotating disk on the lower welding frame 6 rotate in opposite directions, the acting forces which enable the two workpieces to be processed 7 to deviate from each other and are exerted on the two workpieces to be processed 7 by the upper welding frame 5 and the lower welding frame 6 are mutually offset, so that the two workpieces to be processed 7 are only pressed towards the joint surface. One end of each welding shaft 503 can be retracted into the axle box 502 or extend out of the axle box 502, the two welding shafts 503 are retracted into the axle box 502 or extend out of the axle box 502 to realize the adjustment of the distance between the two welding columns 8, the two welding shafts on the upper welding frame 5 and the two welding shafts on the lower welding frame 6 are synchronously adjusted at the same distance to realize the welding of the two welding columns 8 to different point positions, and the multi-point welding is realized. The carrying column 504 is for carrying one end of the plate-like or columnar member to be processed 7. Two welding columns 8 on the upper welding frame 5/the lower welding frame 6, one is connected with a direct current power supply anode, the other is connected with a direct current power supply cathode, the welding column 8 connected with the anode on the upper welding frame 5 and the welding column 8 connected with the cathode on the lower welding frame 6 are mutually matched for welding, the welding column 8 connected with the anode on the upper welding frame 5 and the welding column 8 connected with the cathode on the lower welding frame 6 are respectively contacted with different workpieces 7 to be machined, and the welding column 8 connected with the cathode on the upper welding frame 5 and the welding column 8 connected with the anode on the lower welding frame 6 are mutually matched for welding the two workpieces 7 to be machined; the two welding columns 8 on the upper welding frame 5/the lower welding frame 6 are not electrified simultaneously. The welding of two welding spots can be realized at one time through the arrangement of the upper welding frame 5 and the lower welding frame 6 with the two welding columns 8.
The driving mechanism comprises a driving motor 509 installed in the chassis 501 and two clamping plates 5021 symmetrically installed in the axle box 502, bevel gears 5022 are rotatably installed in the middle positions of the two clamping plates 5021, a transmission shaft 5024 is installed at the output end of the driving motor 509, auxiliary bevel gears are installed on the transmission shaft 5024 and are in meshing transmission with the two bevel gears 5022, and a hollow screw 5023 is installed at the central part of each bevel gear 5022;
an adjusting plate 5034 is mounted at one end of each welding shaft 503, and one end of a hollow lead screw 5023 penetrates through the adjusting plate 5034 and is in threaded transmission with the adjusting plate 5034;
the bottom of axle housing 502 mounts a snap strip on which adjustment plate 5034 slides. The driving motor 509 transmits power to the bevel gear 5022 through the transmission shaft 5024 and the auxiliary bevel gear, so that the hollow screw rod 5023 rotates, the clamping strip limits the adjusting plate 5034, the adjusting plate 5034 is prevented from rotating along with the hollow screw rod 5023, and the two welding shafts 503 are close to each other or far away from each other under the driving of the hollow screw rod 5023. The welding of the two workpieces to be processed 7 at different positions is realized under the approaching or departing of the two welding shafts 503.
Each welding shaft 503 is of a hollow structure, a piston 5028 is installed in one end, in the vertical state, of the welding shaft 503, an end plate 505 is installed at one end, in the vertical state, of the welding shaft 503, a spring is arranged between the end face, in the inner side, of the welding shaft 503, of the end plate 505 and the piston 5028, the welding column 8 is installed on the piston 5028, and one end of the welding column 8 penetrates through the welding shaft 503 and the end plate 505;
the inner space intercommunication of cored screw 5023 welds the inner space of axle 503, install sleeve 5025 between two cored screw 5023, sleeve 5025's lower extreme is fixed with the extension board, extension board one end is fixed on axle box 502 inner wall, move sealing connection between sleeve 5025 and the transmission axle 5024, transmission axle 5024 is the hollow tube structure, transmission axle 5024 overlaps with the output junction of driving motor 509 and is equipped with feed liquor pipe 5026, the one end that transmission axle 5024 is located feed liquor pipe 5026 inside is provided with the feed liquor branch pipe, the feed liquor branch pipe makes transmission axle 5024 inner space intercommunication feed liquor pipe 5026 inner space, feed liquor pipe 5026 one side intercommunication has conveyer pipe 5027, hydraulic system is connected to conveyer pipe 5027. The upper welding frame 5 and the lower welding frame 6 are abutted against the workpieces 7 to be processed through end plates, the upper welding frame 5 and the lower welding frame 6 are matched with each other to apply acting force to the two workpieces 7 to be processed, so that when the two workpieces 7 to be processed are extruded with each other, under the action of a spring on the piston 5028, the end face of one end of the welding column 8 is not in surface contact with the workpieces 7 to be processed; when welding is needed, hydraulic oil is pumped by a hydraulic system, the hydraulic oil enters the welding shaft 503 through the transmission shaft 5024, the sleeve 5025 and the hollow lead screw 5023, the hydraulic oil extrudes the piston 5028, the welding column 8 abuts against the workpiece 7 to be machined, and the welding column 8 on the upper welding frame 5 and the welding column 8 on the lower welding frame 6 are mutually matched to realize direct-current spot welding of the workpiece 7 to be machined.
A column groove 508 is radially arranged at one end of the welding shaft 503 in a vertical state, slide rails 5031 are symmetrically arranged on the column groove 508, an inner ball 5032 is slidably arranged in the slide rails 5031, the inner ball 5032 is connected with a plate ball 5033 through a branch pipe, and the plate ball 5033 is rotatably arranged in the end plate 505;
an avoiding groove 5051 is radially arranged on the end face, far away from the plate ball 5033, of the end plate 505, the opening direction of the avoiding groove 5051 is perpendicular to the opening direction of the sliding rail 5031, and a round angle 5052 is machined in the center of the end plate 505. The relief groove 5051 provides a basis for better bending of the end plate 505 when the end plate 505 is squeezed and bent by a cylindrical member 7 to be machined, the rounded corner 5052 allows space for movement of the weld column 8 when the end plate 505 is bent, and the rounded corner 5052 serves to prevent the end plate 505 from gripping the weld column 8 when bent. When the feeding roller 2 conveys the columnar workpiece 7 to be processed, the columnar workpiece 7 to be processed is fed in an inclined state, one end of the columnar workpiece 7 to be processed is lapped at the avoidance groove 5051 of the end plate 505, the columnar workpiece 7 to be processed is conveyed by the feeding roller 2 for a certain length under the control of the control system, then the working cylinder 4 pushes the upper welding frame 5 downwards, the upper welding frame 5 and the lower welding frame 6 are gradually close to each other, in the approaching process, the end plate on the upper welding frame 5 abuts against the surface of the columnar workpiece 7 to be processed, the end plate 505 is gradually bent under the pressure of the upper welding frame 5 along with the continuous approaching of the upper welding frame 5, the two end plates 505 on the upper welding frame 5 and the lower welding frame 6 are bent and attached to the surface of the columnar workpiece 7 to be processed and the surface of the column groove 508, and after the end plate 505 reaches the bending limit or the upper welding frame 5 is pushed to a specified position by the working cylinder 4, the columnar workpiece 7 to be processed is in a horizontal state. Because the workpieces 7 to be processed are fed in an inclined state, when the workpieces 7 to be processed are in a horizontal state, the two welding shafts 503 on the upper welding frame 5 and the lower welding frame 6 are close to each other, the two workpieces 7 to be processed are abutted together, one ends of the two workpieces 7 to be processed are extruded together, and then the welding column 8 is used for welding the two workpieces 7 to be processed. When the columnar workpiece 7 is to be processed, one of the welding columns 8 on the upper welding frame 5 and one of the welding columns 8 on the lower welding frame 6 are matched with each other to process welding on the workpiece 7, and the two welding columns 8 on the upper welding frame 5/the lower welding frame 6 are not required to be electrified once.
The end face of the end plate 505 far away from the welding shaft 503 is embedded with a soft magnetic ring 506. The soft magnetic ring 506 enables the end plate 505 to be quickly attached to the workpiece 7 to be processed.
Two cold liquid pipes 5029 are arranged in the welding shaft 503, one end of each cold liquid pipe 5029 passes through the hollow screw rod 5023 and penetrates through the sleeve 5025, and the cold liquid pipe 5029 is connected with a cooling circulation system;
the inner balls 5032 and the plate balls 5033 are hollow and communicated through branch pipes, and the end plate 505 is provided with a cooling groove, and two ends of the cooling groove are respectively communicated with the inner spaces of the two plate balls 5033. The cooling circulation system infuses cooling liquid into cold liquid pipe 5029, and the cooling liquid enters the cooling tank of end plate 505 through inner ball 5032, branch pipe and plate ball 5033, and when weld column 8 works, end plate 505 can cool down the position where workpiece 7 to be processed contacts weld column 8, and then reduce the heat on weld column 8, and simultaneously through cooling workpiece 7 to be processed, heat on weld column 8 can be conducted to workpiece 7 to be processed, and the heat that weld column 8 carried during working is greatly reduced.
The working principle of the invention is as follows:
when the plate-shaped workpiece 7 to be machined is conveyed, the feeding rollers 2 at the two ends of the workbench 1 and the auxiliary rollers on the bracket 3 are matched with each other to convey the workpiece 7 to be machined to the lower welding frame 6, one end of the workpiece 7 to be machined is lapped on a bearing column at the middle position of the lower welding frame 6, and then the working cylinder 4 pushes the upper welding frame 5 downwards to enable the end plate 505 on the upper welding frame 5 to abut against the workpiece 7 to be machined.
In the process of descending the upper welding frame 5, the rotating disc 507 adjusts the rotating angle of the case 501, so that the case 501 drives the axle box 502 to rotate, and further the position of the welding column 8 on the workpiece 7 to be processed is adjusted, when the upper welding frame 5 and the lower welding frame 6 are mutually matched to compress the workpiece 7 to be processed, two ends of the upper welding frame 5/the lower welding frame 6 are respectively abutted against the two workpieces 7 to be processed, the upper welding frame 5 and the lower welding frame 6 are in a cross state, the upper welding frame 5 and the lower welding frame 6 are abutted against the workpiece 7 to be processed and before welding, the rotating disc on the upper welding frame 5 and the rotating disc on the lower welding frame 6 rotate at the same time and rotate in opposite directions, so that two welding shafts on the upper welding frame 5 and two welding shafts on the lower welding frame 6 are mutually close to each other, and further the two workpieces 7 to be processed are mutually extruded under the mutual matching of the upper welding frame 5 and the lower welding frame 6, and a sufficient welding pressure is kept between the two workpieces 7 to be processed; because the rotating disk rotates, the upper welding frame 5/the lower welding frame 6 generates acting forces in two directions on the two workpieces to be processed 7, one acting force enables the two workpieces to be processed 7 to deviate from each other along the joint surface, the other acting force enables the two workpieces to be processed 7 to be pressed towards the joint surface, and because the rotating disk on the upper welding frame 5 and the rotating disk on the lower welding frame 6 rotate in opposite directions, the acting forces which enable the two workpieces to be processed 7 to deviate from each other and are exerted on the two workpieces to be processed 7 by the upper welding frame 5 and the lower welding frame 6 are mutually offset, so that the two workpieces to be processed 7 are only pressed towards the joint surface.
When welding is needed, hydraulic oil is pumped by a hydraulic system, the hydraulic oil enters the welding shaft 503 through the transmission shaft 5024, the sleeve 5025 and the hollow lead screw 5023, the hydraulic oil extrudes the piston 5028, the welding column 8 abuts against the workpiece 7 to be machined, and the welding column 8 on the upper welding frame 5 and the welding column 8 on the lower welding frame 6 are mutually matched to realize direct-current spot welding of the workpiece 7 to be machined.
Two welding columns 8 on the upper welding frame 5/the lower welding frame 6, one is connected with a direct-current power supply anode and the other is connected with a direct-current power supply cathode, the welding column 8 connected with the anode on the upper welding frame 5 and the welding column 8 connected with the cathode on the lower welding frame 6 are mutually matched for welding, the welding column 8 connected with the anode on the upper welding frame 5 and the welding column 8 connected with the cathode on the lower welding frame 6 are respectively contacted with different workpieces to be machined 7, and the welding column 8 connected with the cathode on the upper welding frame 5 and the welding column 8 connected with the anode on the lower welding frame 6 are mutually matched for welding the two workpieces to be machined 7; the two welding columns 8 on the upper welding frame 5/the lower welding frame 6 are not electrified simultaneously. The welding of two welding spots can be realized at one time by arranging the two welding columns 8 on the upper welding frame 5 and the lower welding frame 6.
One end of the welding shaft 503 can be received into the axle box 502 or extend out of the axle box 502, the two welding shafts 503 are received into the axle box 502 or extend out of the axle box 502, the distance between the two welding columns 8 is adjusted, after one-time welding frame is completed, after a certain time of pressing, the two welding shafts on the upper welding frame 5 and the lower welding frame 6 are synchronously adjusted at the same distance, the welding of the two welding columns 8 to different point positions is realized, and multi-point welding is realized.
When the feeding roller 2 conveys the columnar workpiece 7 to be processed, the columnar workpiece 7 to be processed is fed in an inclined state, one end of the columnar workpiece 7 to be processed is lapped at the avoidance groove 5051 of the end plate 505, the columnar workpiece 7 to be processed is conveyed by the feeding roller 2 for a certain length under the control of the control system, then the working cylinder 4 pushes the upper welding frame 5 downwards, the upper welding frame 5 and the lower welding frame 6 are gradually close to each other, in the approaching process, the end plate on the upper welding frame 5 abuts against the surface of the columnar workpiece 7 to be processed, the end plate 505 is gradually bent under the pressure of the upper welding frame 5 along with the continuous approaching of the upper welding frame 5, the two end plates 505 on the upper welding frame 5 and the lower welding frame 6 are bent and attached to the surface of the columnar workpiece 7 to be processed and the surface of the column groove 508, and after the end plate 505 reaches the bending limit or the upper welding frame 5 is pushed to a specified position by the working cylinder 4, the columnar workpiece 7 to be processed is in a horizontal state. Because the workpieces 7 to be processed are fed in an inclined state, when the workpieces 7 to be processed are in a horizontal state, the two welding shafts 503 on the upper welding frame 5 and the lower welding frame 6 are close to each other, the two workpieces 7 to be processed are abutted together, one ends of the two workpieces 7 to be processed are extruded together, and then the welding column 8 welds the two workpieces 7 to be processed. When the columnar workpiece 7 is to be processed, one of the welding columns 8 on the upper welding frame 5 and one of the welding columns 8 on the lower welding frame 6 are matched with each other to process welding on the workpiece 7, and the two welding columns 8 on the upper welding frame 5/the lower welding frame 6 are not required to be electrified once.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a multiple spot welding direct current spot welder with autoloading function which characterized in that: the direct current spot welding machine comprises a workbench (1) and a support (3), wherein feeding rollers (2) are mounted on two sides of the workbench (1), the support (3) is mounted on the workbench (1), auxiliary rollers are arranged on the support (3) corresponding to the positions of the two feeding rollers (2), a working cylinder (4) is mounted below the upper end of the support (3), telescopic guide rods are arranged on two sides of the working cylinder (4), a bottom plate is mounted on the telescopic guide rods, an output shaft of the working cylinder (4) is connected with the bottom plate, an upper welding frame (5) is mounted below the bottom plate, and a lower welding frame (6) is rotatably mounted at a position right below the upper welding frame (5) above the workbench (1);
the side plates are installed on two sides of the feeding roller (2), the feeding motor is installed on a roller shaft of the feeding roller (2), the feeding motor is installed on one side plate, and an annular groove (201) is machined in the middle of the feeding roller (2).
2. The multipoint spot welding direct current spot welding machine with the automatic feeding function according to claim 1, characterized in that: the upper welding frame (5) and the lower welding frame (6) are identical in composition structure and structure arrangement;
the upper welding frame (5) comprises a case (501) and two L-shaped welding shafts (503), a rotating disc (507) is installed inside the upper end of the case (501), the output end of the rotating disc (507) is located on the outer side of the case (501), the output end of the rotating disc (507) is connected with a bottom plate through a flange plate, an axle box (502) is installed below the case (501), one end of each welding shaft (503) is installed in the axle box (502) in a sliding mode, a driving mechanism is arranged in the case (501) and enables the two welding shafts (503) to extend out or retract on the axle box (502), a welding column (8) is installed at the other end of each welding shaft (503), and the welding columns (8) are connected with electrodes of a direct-current power supply through a control system;
and a bearing column (504) is rotatably arranged at the lower end of the middle part of the axle box (502).
3. The multipoint spot welding direct current spot welding machine with the automatic feeding function according to claim 2, characterized in that: the driving mechanism comprises a driving motor (509) arranged in a case (501) and two clamping plates (5021) symmetrically arranged in an axle box (502), bevel gears (5022) are rotatably arranged in the middle of the two clamping plates (5021), a transmission shaft (5024) is arranged at the output end of the driving motor (509), auxiliary bevel gears are arranged on the transmission shaft (5024), the auxiliary bevel gears are in meshing transmission with the two bevel gears (5022), and a hollow screw rod (5023) is arranged at the center of each bevel gear (5022);
an adjusting plate (5034) is arranged at one end of each welding shaft (503), and one end of the hollow lead screw (5023) penetrates through the adjusting plate (5034) and is in threaded transmission with the adjusting plate (5034);
a clamping strip is arranged at the bottom of the axle box (502), and the adjusting plate (5034) slides on the clamping strip.
4. The multipoint spot welding direct current spot welder with the automatic feeding function according to claim 3, characterized in that: each welding shaft (503) is of a hollow structure, a piston (5028) is installed in one end, in the vertical state, of each welding shaft (503), an end plate (505) is installed at one end, in the vertical state, of each welding shaft (503), a spring is arranged between the end face, in the inner side, of each welding shaft (503), where the end plate (505) is installed, of each welding shaft and the piston (5028), each welding column (8) is installed on the corresponding piston (5028), and one end of each welding column (8) penetrates through the corresponding welding shaft (503) and the corresponding end plate (505);
the inner space of the inner space intercommunication welding shaft (503) of hollow lead screw (5023), two install sleeve pipe (5025) between hollow lead screw (5023), the lower extreme of sleeve pipe (5025) is fixed with the extension board, extension board one end is fixed on axle box (502) inner wall, move sealing connection between sleeve pipe (5025) and transmission axle (5024), transmission axle (5024) are the hollow tube structure, and the output junction cover of transmission axle (5024) and driving motor (509) is equipped with feed liquor pipe (5026), and the one end that transmission axle (5024) is located feed liquor pipe (5026) inside is provided with the feed liquor branch pipe, the feed liquor branch pipe makes transmission axle (5024) inner space intercommunication feed liquor pipe (5026) inner space, feed liquor pipe (5026) one side intercommunication has conveyer pipe (5027), hydraulic system is connected in conveyer pipe (5027).
5. The multipoint spot welding direct-current spot welder with the automatic feeding function according to claim 4, characterized in that: a column groove (508) is radially arranged at one end of the welding shaft (503) in a vertical state, sliding rails (5031) are symmetrically arranged on the column groove (508), an inner ball (5032) is slidably arranged in the sliding rails (5031), the inner ball (5032) is connected with a plate ball (5033) through a branch pipe, and the plate ball (5033) is rotatably arranged in the end plate (505);
an avoiding groove (5051) is radially formed in the end face, away from the plate ball (5033), of the end plate (505), the opening direction of the avoiding groove (5051) is perpendicular to the opening direction of the sliding rail (5031), and a round corner (5052) is machined in the center of the end plate (505).
6. The multipoint spot welding direct current spot welding machine with the automatic feeding function according to claim 4, characterized in that: and a soft magnetic ring (506) is embedded on the end surface of the end plate (505) far away from the welding shaft (503).
7. The multipoint spot welding direct current spot welding machine with the automatic feeding function according to claim 5, characterized in that: two cold liquid pipes (5029) are arranged in the welding shaft (503), one end of each cold liquid pipe (5029) passes through the hollow screw rod (5023) and penetrates through the sleeve (5025), and the cold liquid pipes (5029) are connected with a cooling circulation system;
the inner balls (5032) and the plate balls (5033) are hollow and communicated through branch pipes, a cooling groove is arranged in the end plate (505), and two ends of the cooling groove are respectively communicated with the inner spaces of the two plate balls (5033).
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