WO2013053226A1

WO2013053226A1 - Direct current welding machine

Info

Publication number: WO2013053226A1
Application number: PCT/CN2012/075118
Authority: WO
Inventors: 黄腾飞; 邱剑平; 刘晓磊; 郦雪云; 李贤元; 王树华; 巩家祥; 朱海星; 黄思姬
Original assignee: 南车戚墅堰机车车辆工艺研究所有限公司; 常州市瑞泰工程机械有限公司
Priority date: 2011-10-15
Filing date: 2012-05-07
Publication date: 2013-04-18
Also published as: CN103042294A; CN103042294B

Abstract

A direct current welding machine comprising a first set of machine frame (2, 2'), a second set of machine frame (6, 6'), a centre shaft (8), a clamping oil cylinder (3), a shearing device (4), a forging oil cylinder (7) and a medium frequency welding transformer (10), wherein a hydraulic cylinder (9) is connected onto the centre shaft (8), and the hydraulic cylinder (9) comprises a first cylinder (9-1) and a second cylinder (9-2) with the same internal diameter, a first piston (9-3), a second piston (9-4) and a shared piston rod (9-5); a first hydraulic chamber (9-1-1) is in communication with a second oil port (9-9); a second hydraulic chamber(9-1-2) is in communication with a third oil port (9-10); a third hydraulic chamber (9-2-1) is in communication with a fourth oil port (9-7); and a fourth hydraulic chamber (9-2-2) is in communication with a fifth oil port (9-8). Two shearing oil cylinders (1) both comprise a shearing cylinder body (1-7), a shearing piston (1-1), and a shearing piston rod (1-6). The fourth oil port (9-7) and the second oil port (9-9) of the hydraulic cylinder (9) are in communication with a second oil port (A2) of a three-position, four-way solenoid valve (13); and the fifth oil port (9-8) and the third oil port (9-10) are respectively in communication with a first shearing oil port (1-4) of the two shearing oil cylinders (1). The direct current welding machine can ensure the synchronism of the two shearing oil cylinders and has a simple structure.

Description

DC welding machine

[0001] The present invention relates to a flash butt welding apparatus, particularly a mobile rail flash DC welder.

Background technique

[0002] The head of the mobile rail flash welder currently in common use is generally composed of four closed boxes, which are internally equipped with a welding transformer, and are arranged with various pipelines and the like, and the space inside the box is small, resulting in inconvenience in assembly and maintenance. The head of the newly-applied rail flash welder is designed as a frame structure, and the head is composed of two sets of frames. Although this simplifies the structure to a certain extent, there is still poor synchronism, poor structure, and complicated oil passage. , and many other processing steps. For example, the application document of Chinese Patent Application No. 200880127967.9 discloses a rail-site rail-welding system which has the following disadvantages: the two thrust cylinders have a problem of poor synchronism, and it is difficult to avoid the injury and the mother appearing during the pushing process. In the case of materials; any of the two sets of racks consists of three bearing frames, the structure is still relatively complex, and there are many processing steps. In addition, a total of four clamping cylinders are required for the two sets of frames, further increasing the complexity of the welder structure and oil path. In addition, if the flow balance valve is connected with the push cylinder to solve the synchronization problem of the push cylinder, there will still be lags in the synchronous adjustment, low degree of automation during adjustment, large influence of artificial factors, etc., and the process of inducing the tumor cannot be ensured. Smooth.

Summary of the invention

[0003] An object of the present invention is to provide a DC welding machine capable of more reliably ensuring the synchronism of two thrust cylinders, thereby ensuring the quality of the rail welded joints, having a reasonable structure, a simple oil passage, and being easy to manufacture, assemble and maintain. .

[0004] In order to achieve the above object, the technical solution of the present invention is: A DC welding machine, comprising a first group of frames, a second group of frames, a center shaft, a clamping cylinder, a pushing device, an upsetting cylinder and an intermediate frequency a welding transformer, wherein the first set of frames and the second set of frames are hingedly mounted on a common central shaft to form two pairs of clamp clamping mechanisms, each pair of clamp clamping mechanisms between the frames A clamping cylinder is provided to drive the first set of frames and the second set of frames to rotate about a central axis, and the first set of frames and the second set of frames are connected by a top forging cylinder to realize two sets of rack edges The central axis is relatively moved in the direction of the axis, and the two intermediate frequency welding transformers are installed outside the first group of racks or the second group of racks, and two intermediate frequency welding transformers are connected in parallel, each of which is equipped with conductive jaws and no a conductive jaw, the conductive jaw is electrically connected to the corresponding intermediate frequency welding transformer, the pushing and protruding device comprises two protruding convex cylinders, the central shaft is connected with a synchronous distributor, and the synchronous distributor is a hydraulic cylinder, Hydraulic cylinder includes two a first cylinder and a second cylinder having the same inner diameter, a first piston, a second piston, and a common piston rod, the first piston and the second piston are mounted on the piston rod, and the first piston divides the first cylinder The first hydraulic chamber and the second hydraulic chamber, the second piston divides the second cylinder into a third hydraulic chamber and a fourth hydraulic chamber, the first hydraulic chamber communicates with the second oil port, and the second hydraulic chamber and the third oil The port is connected, the third hydraulic chamber is connected to the fourth port, and the fourth hydraulic chamber is connected to the fifth port. The two push cylinders respectively include a push cylinder, a push piston and a push piston rod, wherein the push piston is mounted on the push piston rod, and the push piston divides the push cylinder into the first a cavity and a second cavity, wherein the first cavity and the second cavity are respectively connected with the first protruding convex port and the second protruding convex port, and the fourth port, the second port and the three-position four-way electromagnetic of the hydraulic cylinder The second port of the valve is connected, and the fifth port and the third port of the hydraulic cylinder are respectively connected with the first protruding convex ports of the two protruding convex cylinders, and the second protruding convex ports of the two protruding convex cylinders are connected in parallel. Connected to the fourth port of the three-position four-way solenoid valve, the first port of the three-position four-way solenoid valve is connected to the oil passage, and the third port of the three-position four-way solenoid valve is connected with the single port Return oil to the valve.

[0005] The pushing and protruding device further comprises a pusher blade seat and a pusher blade, and the pusher blade seat is connected with the pusher piston rod of the pusher cylinder.

The hydraulic cylinder further includes a closable first port in communication with the first hydraulic chamber and a closable sixth port in communication with the fourth hydraulic chamber.

[0007] The first set of racks and the second set of racks each include a frame of two frame-type welded structures.

[0008] any one of the first group of racks and the second group of racks includes a jaw seat, a first plate and a second plate, and the first plate and the second plate are arranged side by side. The lower portion of the first support plate is welded with a panel, the side portion is welded side by side with a first hinge and a second hinge, the panel has a through hole, and the first hinge and the second hinge respectively have a first hinge hole and a first hinge a second hinge hole, the upper portion of the first support plate has a first cylinder connection hole, the upper portion of the second support plate has a second cylinder connection hole corresponding to the axial direction of the first cylinder connection hole, and the lower portion has a third hinge hole a third hinge hole axially corresponding to the first hinge hole and the second hinge hole, wherein the first support plate is fixedly welded to the jaw seat by the panel, the first hinge and the second hinge, and the lower portion of the second support plate Welding and fixing with the jaw seat, a first connecting plate is welded and fixed between an upper portion of the first supporting plate and an upper portion of the second supporting plate, and a second connection is fixedly fixed between the lower plate and the lower portion of the second supporting plate board.

[0009] The first support plate of any one of the racks is provided with two juxtaposed synchronization ears, and the second support plate of the other rack mating with each of the sets of racks Correspondingly, there are two synchronized ears arranged side by side. The synchronizing ears ensure the synchronism of the welder frame as it rotates around the central axis, which in turn improves the alignment of the rails and ensures the quality of the welded joints of the rails.

[0010] A gasket is welded and fixed at both ends of the third hinge hole on the second support plate.

[0011] An ear pad is welded and fixed at an inner end of the first cylinder connecting hole on the first supporting plate and an inner end of the second cylinder connecting hole of the second supporting plate.

[0012] The first support plate and the second support plate are each provided with a weight reduction through hole. Reduce the weight of the welder frame while maintaining performance.

[0013] The jaw seat is provided with a protruding cylinder mounting hole.

[0014] The jaw seat and the panel are made of stainless steel, and the first plate, the second plate, the first hinge, the second hinge, the first connecting plate and the second connecting plate are all made of high-strength steel plate.

[0015] the two intermediate frequency welding transformers are respectively installed outside the first support plate of one rack of the first group of racks and another The outside of the second support of the rack.

[0016] the conductive jaws on the first set of racks are respectively connected to one of the input ends of the intermediate frequency welding transformers on the corresponding side through the first bus bar, and the conductive jaws on the second set of racks pass through the third The bus bar, the top forging rod electrode and the second bus bar are connected to the other input end of the intermediate frequency welding transformer of the corresponding side.

[0017] the first group of racks and the second group of racks are connected with a leveling spreader, the leveling spreader comprises a lifting lug and two tie rod assemblies, and further has a screw, a beam and a U-bolt, the hanging The lower part of the ear has a connecting sleeve, and the connecting sleeve is sleeved on the screw, and the adjusting screw is screwed on the screw, and two adjusting nuts are respectively pressed against the two ends of the connecting sleeve, and a rod assembly is respectively hinged at two ends of the screw The pull rod assembly includes a fork bolt, a first nut, a sleeve, a screw plug, an insulating block, an insulating sleeve and a tie rod, the lower part of the fork bolt has an external thread, and the sleeve has an internal thread and a sleeve The internal thread of the cylinder is screwed with the external thread of the lower part of the fork bolt and locked by the first nut, the lower part of the sleeve has a stepped hole, and the step head of the pull rod is assembled with the stepped hole through the insulating sleeve, and the internal thread of the sleeve is Screwed with a screw plug, the screw plug is pressed against the insulating block, the insulating block is pressed against the top surface of the step head of the pull rod, the lower part of the pull rod is fixedly connected with the beam, and the end of the u-shaped bolt passes through the beam And a second hole with a nut means attached to the beam.

[0018] A lock washer is further interposed between the sleeve and the first nut.

[0019] the pull rod is further sleeved with a sheath and a pressure sleeve, the upper end of the sheath is opposite to the lower end of the sleeve, the lower end of the sheath is abutted against the upper end of the sleeve, and the lower end of the sleeve is opposite to the beam, and the lower part of the rod has an external thread, and The lower part of the tie rod passes through the connecting hole on the beam, and the lower part of the external thread is screwed with the third nut.

[0020] The upper portion of the sheath is also sleeved on a portion of the insulating sleeve that is outside the projecting sleeve.

[0021] the fork head of the fork bolt has a first pin hole, the two ends of the screw are connecting ears with a second pin hole, and the connecting ear is inserted in the fork groove of the corresponding fork bolt and The articulation is achieved by the connecting pin passing through the first pin hole on the prong of the prong bolt and the second pin hole of the connecting lug.

[0022] The clamping cylinder is connected with an insulating oil pipe joint through a pipeline, the insulating oil pipe joint includes a first joint, a second joint and a nut, and the fitting end surface of the first joint is equipped with a first sealing ring, and the second joint The mating end surface is provided with a second sealing ring, and an insulating plate is disposed between the first joint and the second joint, the mating end surface of the first joint and the mating end surface of the second joint, and the first sealing ring and the second sealing ring are respectively pressed against On both sides of the insulating plate, the joint portion of the first joint has a radial first annular flange, and the joint portion of the second joint has a radial second annular flange, the second ring The flange has a flange external thread, the front inner hole of the nut is screwed with the flange external thread on the second annular flange of the second joint, and the rear inner hole is insulated from the outer circumference of the first joint The sleeve has a locking step, the locking step abuts against the insulating sleeve, and the first joint has a first external thread away from the first annular flange portion, and the first external thread and the first ring a first hex head between the flanges, Away from the second annular flange portion of said second connector has a second external thread, the second outer screw A second hex head is disposed between the rib and the second annular flange. The insulated oil pipe joint has high reliability, easy connection and insulation at both ends.

[0023] The free end of the first joint has a sealing cone seat surface; the free end of the second joint has a sealing cone seat surface.

[0024] After adopting the above structure, since the central shaft is connected with a synchronous distributor, the synchronous distributor is a hydraulic cylinder, the hydraulic cylinder is connected with the two thrust cylinder oil passages, and passes through the three-position four-way solenoid valve and the inlet and outlet. The oil roads are connected. Not only the synchronization of the two push cylinders is ensured, but also the uniformity of the rail joints is ensured, the damage of the base material during the pushing process is avoided, and the quality of the rail welded joints is improved. Moreover, the oil connection is relatively simple. At the same time, the hydraulic cylinder used in the present invention also solves the problem of hysteresis in the prior art in the synchronous adjustment, and can better ensure the synchronization of the two push cylinders; and the hydraulic cylinder used in the present invention may not Affected by various factors such as system pressure, flow and load, and manual adjustment, it can achieve more reliable synchronous adjustment and high degree of automation.

[0025] Each set of racks requires only one clamping cylinder, which reduces the number of clamping cylinders required, simplifies the structure, and makes the oil circuit simpler. In addition, two intermediate frequency welding transformers are mounted on the outside of the first or second set of frames to make the structure more reasonable and easy to assemble and maintain.

[0026] In addition, since the first group of racks and the second group of racks each include two rack-type welded structure racks, any one of the first group of racks and the second group of racks The utility model comprises a jaw seat, a first branch plate and a second support plate, wherein the first branch plate and the second support plate are arranged side by side, the lower portion of the first support plate is welded with the panel, and the side portions are welded side by side with the first hinge and the second Hinge, therefore, the frame structure is simple, easy to process, weld, assemble and repair, and the heat dissipation performance is good; it is also conducive to the manufacture, assembly and maintenance of the welder.

DRAWINGS

1 is a schematic structural view of a DC welding machine of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Figure 3 is a cross-sectional view taken along line B-B of Figure 1;

Figure 4 is a schematic structural view of a hydraulic cylinder in the present invention;

Figure 5 is a cross-sectional view taken along line C-C of Figure 4;

Figure 6 is a schematic structural view of a frame in the present invention;

Figure 7 is a left side view of Figure 6;

Figure 8 is a right side view of Figure 6;

Figure 9 is a cross-sectional view taken along line D-D of Figure 6;

Figure 10 is a cross-sectional view taken along line E-E of Figure 7;

Figure 11 is a perspective view of the three-dimensional structure of Figure 6;

Figure 12 is a schematic view showing the hinge structure of the first group of frames and the second group of frames in the present invention; Figure 13 is a schematic structural view of a push cylinder in the present invention;

Figure 14 is a schematic view showing the principle of the protruding oil passage in the present invention;

Figure 15 is a schematic structural view of the leveling spreader of Figure 1;

Figure 16 is a left side view of Figure 15;

Figure 17 is a cross-sectional view taken along line G-G of Figure 15;

Figure 18 is a cross-sectional view taken along line F-F of Figure 15;

Figure 19 is a cross-sectional view taken along line H-H of Figure 16;

Figure 20 is a schematic structural view of the insulated oil pipe joint of Figure 1;

Figure 21 is a schematic view showing the operation of the DC flash welding system of the present invention.

detailed description

[0028] The present invention will be further described in detail below with reference to the embodiments shown in the drawings.

1 to 14, a DC welding machine of the present invention includes a first group of frames 2, 2, a second group of frames 6, 6', a center shaft 8, a clamping cylinder 3, a pushing device 4, a top forging cylinder 7 and an intermediate frequency welding transformer 10, wherein the first group of frames 2, 2' and the second group of frames 6, 6 are all hingedly mounted on a common central axis 8 Two pairs of pincer clamping mechanisms, each of which is provided with a clamping cylinder 3 between the frames of the clamp clamping mechanism to drive the first group of frames 2, 2' and the second group of frames 6, 6' around the center The shaft 8 is rotated, and the first set of frames 2, 2, and the second set of frames 6, 6' are connected by a top forging cylinder 7 to achieve relative movement of the two sets of frames along the axis of the central axis 8 The intermediate frequency welding transformers 10 are all installed outside the first group of racks 2, 2' or the second group of racks 6, 6, and the two intermediate frequency welding transformers 10 are connected in parallel, and each of the racks is provided with conductive jaws 11 -1 and the non-conductive jaw 11-2, the conductive jaw 11-1 is electrically connected to the corresponding intermediate frequency welding transformer 10, the pushing device 4 comprises two protruding cylinders 1, the central axis 8 The top loading is connected with a synchronous distributor, the synchronous distributor is a hydraulic cylinder 9, and the hydraulic cylinder 9 includes two first cylinders 9-1 and a second cylinder 9-2 having the same inner diameter, and a second piston 9-3. a second piston 9-4 and a common piston rod 9-5, the first piston 9-3 and the second piston 9-4 are mounted on the piston rod 9-5, and the first piston 9-3 will be the first cylinder The barrel 9-1 is divided into a first hydraulic chamber 9-1-1 and a second hydraulic chamber 9-1- 2, and the second piston 9-4 divides the second cylinder 9-2 into a third hydraulic chamber 9-2- 1 and the fourth hydraulic chamber 9-2-2, the first hydraulic chamber 9-1-1 is in communication with the second port 9-9, and the second hydraulic chamber 9-1-2 is in communication with the third port 9-10. The third hydraulic chamber 9-2-1 is in communication with the fourth port 9-7, and the fourth hydraulic chamber 9-2-2 is in communication with the fifth port 9-8, and the two push cylinders 1 each include a push convex The cylinder 1-7, the push piston 1-1 and the push piston rod 1-6, wherein the push piston 1-1 is mounted on the push piston rod 1-6, and the push piston 1-1 pushes the cylinder 1-7 is divided into a first cavity 1-3 and a second cavity 1-2, and the first cavity 1-3 and the second cavity 1-2 are respectively coupled with the first protruding convex port 1-4 and the second protruding convex oil Ports 1-5 are connected, and the fourth port 9-7 of the hydraulic cylinder 9 The second port 9-9 is in communication with the second port A2 of the three-position four-way solenoid valve 13, and the fifth port 9-8 and the third port 9-10 of the hydraulic cylinder 9 are respectively The first protruding oil ports 1-4 of the two thrust cylinders 1 are connected, the second protruding oil ports 1-5 of the two thrust cylinders 1 are connected in parallel, and the fourth port B2 of the three-position four-way solenoid valve 13 The first port A1 of the three-position four-way solenoid valve 13 is connected to the oil passage P, and the third port B1 of the three-position four-way solenoid valve 13 is connected to the oil returning the check valve 14 Road T.

[0030] As shown in FIG. 2, the pushing and protruding device 4 further includes a pusher blade seat 4-1 and a pusher blade 4-2, and the pusher blade seat 4-1 and the pusher piston rod 1 of the push cylinder 1 are pushed. -6 connection.

[0031] As shown in FIG. 5, the hydraulic cylinder 9 further includes a closable first port 9-6 connected to the first hydraulic chamber 9-1-1, and a fourth hydraulic chamber 9-2-2. Connectable closable sixth port 9-11. The first port 9-6 serves as a backup port for the second port 9-9, and the sixth port 9-11 serves as a backup port for the fifth port 9-8; if these spare ports are not activated, Closed with a plug. When the plug is used, the plug can be used as an exhaust port to prevent air from mixing into the hydraulic chamber and affecting the effect of synchronous pushing, which can further improve the synchronization accuracy of the two push cylinders, and the setting is also more convenient for the welder. Assembly.

[0032] Of course, the hydraulic cylinder 9 may not have the first port 9-6 and the sixth port 9-11.

[0033] As shown in FIGS. 3, 6, 7, 8, 9, 10, and 11, in order to make the frame structure simple and easy to manufacture, the first group of racks 2, V and the second group of racks 6, 6 'Each frame that includes two frame-type welded structures. As shown in Figures 3, 6, 7, 8, 9, 10, and 11, in order to make the frame structure simple, easy to process, assemble and repair, and the heat dissipation performance is good, the first group of racks and the second group of racks Any of the racks includes a jaw seat 2-6, a first plate 2-1, and a second plate 2-4, the first plate 2-1 and the second plate 2-4 being juxtaposed, The lower portion of the first plate 2-1 is welded with the panels 2-10, and the side portions are welded side by side with the first hinge 2-7 and the second hinge 2-8, and the panels 2-10 have through holes 2-10 -1, the first hinge 2-7 and the second hinge 2-8 have a first hinge hole 2-7-1 and a second hinge hole 2-8-1, respectively, the upper portion of the first support plate 2-1 a first cylinder connecting hole 2-1-1, and an upper portion of the second supporting plate 2-4 has a second cylinder connecting hole 2-4-1 axially corresponding to the first cylinder connecting hole 2-1-1, The lower portion has a third hinge hole 2-4-2, and the third hinge hole 2-4-2 axially corresponds to the first hinge hole 2-7-1 and the second hinge hole 2-8-1, the first branch The plate 2-1 is welded and fixed to the jaw seat 2-6 by the panel 2-10, the first hinge 2-7 and the second hinge 2-8, the The lower portion of the support plate 2-4 is welded and fixed to the jaw seat 2-6, and the first connecting plate 2-3 is welded and fixed between the upper portion of the first support plate 2-1 and the upper portion of the second support plate 2-4. A second connecting plate 2-11 is welded and fixed between the panel 2-10 and the lower portion of the second supporting plate 2-4.

[0034] As shown in FIG. 6, 7, 8, and 11, in order to keep the movement of each group of frames synchronized, the synchronization of the welder frame when rotating around the central axis is ensured, and the alignment of the rail is improved to ensure the rails. Welding quality, the first supporting plate 2-1 of any one of the racks is provided with two synchronous ears 2-9 arranged side by side, as shown in FIG. The second support plate 2-4 of the other frame is correspondingly provided with two synchronous ears 2-9 arranged side by side.

[0035] As shown in FIGS. 6 and 9, in order to leave a machining allowance on both sides of the third hinge hole, the second support plate 2-4 The washers 2-5 are welded and fixed at both ends of the three hinge holes 2-4-2.

[0036] As shown in FIGS. 6 and 11, in order to improve the wear resistance and strength at the cylinder connecting hole, the inner end of the first cylinder connecting hole 2-1-1 on the first support plate 2-1 is An ear pad 2-2 is welded and fixed to the inner end of the second cylinder connecting hole 2-4-1 on the second supporting plate 2-4.

[0037] As shown in FIGS. 7, 8, and 11, in order to reduce the weight of the welder frame under the premise of ensuring the use performance, the first support plate 2-1 and the second support plate 2-4 are both opened. There are weight reduction through holes 2-1-2, 2-4-3.

As shown in FIGS. 7, 8, 10, and 11, in order to facilitate the installation of the push cylinder, the jaw seat 2-6 is provided with a push cylinder mounting hole 2-6-1.

[0039] As shown in FIGS. 6-11, in order to meet the performance of the rail flash welder, the jaw seat 2-6 and the panel 2-10 are made of stainless steel, the first plate 2-1, the second plate 2-4. The first hinge 2-7, the second hinge 2-8, the first connecting plate 2-3, and the second connecting plate 2-11 are each made of a high-strength steel plate.

[0040] As shown in FIGS. 1, 2, and 12, the two intermediate frequency welding transformers 10 are respectively installed outside the first support plate 2-1 of one rack of the first group of racks 2, 2' and another machine The second side of the frame is 2-4 outside.

[0041] As shown in FIG. 2, in order to make the structure more reasonable and easy to assemble, the conductive jaws 11-1 on the first group of racks 2, 2' respectively pass through the first bus bar 12-1 and the corresponding side. One of the input ends of the intermediate frequency welding transformer 10 is connected, and the conductive jaws 11-1 on the second group of frames 6, 6 pass through the third bus bar 12-3, the forging rod electrode 7-1 and the second confluence in sequence. Row 12-2 is connected to the other input of the intermediate frequency welding transformer 10 on the respective side.

[0042] As shown in FIG. 1 and FIG. 15-19, in order to facilitate the lifting of the welding machine and maintaining the horizontal position of the left and right sides of the welding machine, it is convenient to track and clamp the welding machine during the welding process of the rail, A set of racks 2, V and a second set of racks 6, 6, are connected with a leveling spreader 5, and the leveling spreader 5 comprises a lifting lug 5-1 and two tie rod assemblies 5-4, and also has a screw 5 -8, the beam 5-6 and the U-bolt 5-7, the lower part of the lifting lug 5-1 has a connecting sleeve 5-1-1, and the connecting sleeve 5-1-1 is sleeved on the screw 5-8, Two adjusting nuts 5-2 are screwed onto the screws 5-8, and two adjusting nuts 5-2 are respectively pressed against the two ends of the connecting sleeve 5-1-1, and one ends of the screws 5-8 are respectively hinged The tie rod assembly 5-4, the pull rod assembly 5-4 includes a fork bolt 5-4-1, a first nut 5-4-2, a sleeve 5-4-3, a screw plug 5-4-4, and an insulation Pad 5-4-5, insulating sleeve 5-4-6 and tie rod 5-4-7, the lower part of the fork bolt 5-4-1 has an external thread, and the sleeve 5-4-3 has an inner portion Thread, the internal thread of the sleeve 5-4-3 is screwed with the external thread of the lower part of the fork bolt 5-4-1 and is locked by the first nut 5-4-2, the sleeve 5- 4-3 has a stepped hole 5-4-3-1 in the lower part, and the step 5-4-7-1 of the pull rod 5-4-7 is assembled through the insulating sleeve 5-4-6 and the stepped hole 5-4-3-1 , the internal thread of the sleeve 5-4-3 is screwed with a screw plug 5-4-4, and the screw plug 5-4-4 is pressed against the insulating block 5-4-5, the insulating block 5-4 -5 is pressed against the top surface of the step 5-4-7-1 of the pull rod 5-4-7, and the lower portion of the pull rod 5-4-7 is fixedly connected with the beam 5-6, the U-bolt 5-7 The ends pass through the receptacle 5-6-1 on the beam 5-6 and are attached to the beam 5-6 by a second nut 5-5. [0043] As shown in FIG. 17, in order to prevent looseness, a lock washer 5-4-10 is interposed between the sleeve 5-4-3 and the first nut 5-4-2.

[0044] As shown in FIG. 17, in order to firmly connect the tie rod 5-4-7 with the beam 5-6, the pull rod 5-4-7 is also sheathed with a sheath 5-4-8 and a pressure sleeve 5-4. -9, the upper end of the sheath 5-4-8 is offset from the lower end of the sleeve 5-4-3, and the lower end of the sheath 5-4-8 is offset from the upper end of the sleeve 5-4-9, and the lower end of the sleeve 5-4-9 is The beam 5-6 is abutted, the lower part of the pull rod 5-4-7 has an external thread 5-4-7-2, and the drawbar

5- 4-7 The lower part passes through the connecting hole 5-6-2 on the cross member 5-6-2 and the outer thread 5-4-7-2 is connected to the third nut 5-9 thread.

[0045] As shown in FIG. 17, in order to make the insulation more reliable, the upper portion of the sheath 5-4-8 is also sleeved outside the extension sleeve 5-4-3 of the insulating sleeve 5-4-6. Partially.

[0046] As shown in FIG. 17, in order to make the screw 5-8 and the tie rod assembly 5-4 convenient and reliable, the fork head 5-4-1 has a first pin hole 5-4- on the fork head. 1-1, both ends of the screw 5-8 are connecting ears with a second pin hole 5-8-1, and the connecting ear is inserted in the fork groove of the corresponding fork bolt 5-4-1 and connected The pin 5-3 is hinged through the first pin hole 5-4-1-1 on the fork of the fork bolt 5-4-1 and the second pin hole 5-8-1 of the connecting lug.

[0047] As shown in FIG. 1 and FIG. 20, in order to improve the reliability of the welder, the tubing joint is not easy to be cracked, and the connection with the oil pipe is facilitated, the clamping oil cylinder 3 is connected with an insulating oil pipe joint 15 through a pipeline, and the insulating oil pipe joint is connected. 15 includes a first joint 15-1, a second joint 15-6, and a nut 15-7. The mating end surface of the first joint 15-1 is equipped with a first sealing ring 15-3, and the second joint 15-6 is matched. The end surface is provided with a second sealing ring 15-5, and the first joint 15-1 and the second joint 15-6 have an insulating plate 15-4, a mating end face of the first joint 15-1 and a second joint 15-6 The mating end faces and the first sealing ring 15-3 and the second sealing ring 15-5 are respectively pressed against the two sides of the insulating plate 15-4, and the joint portion of the first joint 15-1 has a radial first An annular flange 15-1-1, the joint portion of the second joint 15-6 has a second annular annular flange 15-6-1, and the second annular flange 15-6-1 has Flange external thread 15-6-2, front inner hole of the nut 15-7 and flange external thread 15-6-2 on the second annular flange 15-6-1 of the second joint 15-6 Threaded connection, inside rear An insulating sleeve 15-2 is disposed between the outer circumference of the first joint 15-1, the rear end of the nut 15-7 has a locking step 15-7-1, and the locking step 15-7-1 abuts against the insulating sleeve 15- 2, the portion of the first joint 15-1 that is away from the first annular flange 15-1-1 has a first external thread 15-1-2, and the first external thread 15-1-2 is first A first hex head 15-1-3 is disposed between the annular flange 15-1-1, and a portion of the second joint 15-6 away from the second annular flange 15-6-1 has a second External thread 15-6-3, at second external thread 15-6-3 and second annular flange 15-

There is a second hex head 15-6-4 between 6-1.

[0048] As shown in FIG. 20, in order to further facilitate the connection of the oil pipe, the free end of the first joint 15-1 has a sealing cone seat surface 15-1-4; the free end of the second joint 15-6 has a seal. Cone seat surface 15-6-5.

[0049] As shown in FIG. 1, 2, 3, 5, 12, 13, and 14, the process of the present invention is as follows. When pushing, the three-position four-way solenoid valve 13 The first port A1 is connected to the second port A2, the third port B1 is connected to the fourth port B2, and the hydraulic oil enters the first hydraulic chamber 9-1-1 and the third hydraulic chamber 9 of the hydraulic cylinder 9 In 2-1, the first piston 9-3, the second piston 9-4, and the first piston rod 9-5 are pushed to the right to force the second hydraulic chamber 9-1-2 and the fourth hydraulic chamber 9-2- The hydraulic oil in 2 enters the first chamber 1-3 of the two thrust cylinders 1 respectively, so that the push piston rod 1-6 is extended, and the hydraulic oil in the second chamber 1-2 passes through the three-position four-way solenoid valve The fourth port B2 and the third port B1 of 13 open the check valve 14 into the fuel tank to complete the pushing and contracting. Since the first cylinder 9-1 and the second cylinder 9-2 of the hydraulic cylinder 9 have the same inner diameter, and the first piston 9-3 and the second piston 9-4 are mounted on the same piston rod 9-5, Therefore, the hydraulic oil entering the first chamber 1-3 of the two thrust cylinders 1 from the second hydraulic chamber 9-1-2 and the fourth hydraulic chamber 9-2-2 is equal, thereby ensuring two pushes and convexities. Synchronization of the cylinder 1. After the pushing and bending is completed, the first port A1 of the three-position four-way solenoid valve 13 is connected to the fourth port B2, the third port B1 is connected to the second port A2, and the hydraulic oil is passed through the three-position four-way solenoid valve 13 The second chambers 1-2 of the two push cylinders 1 push the push piston rods 1-6 to retract, forcing the hydraulic oil in the first chambers 1-3 to enter the second hydraulic chamber 9-1-2 of the hydraulic cylinder 9, In the fourth hydraulic chamber 9-2-2, the first piston 9-3, the second piston 9-4 and the piston rod 9-5 are pushed to the left to make the first hydraulic chamber 9-1-1 and the third hydraulic chamber In the 9-2-1, the hydraulic oil passes through the second port A2 of the three-position four-way solenoid valve 13, and the third port B1, and then the check valve 14 is opened to return to the tank.

[0050] As shown in FIG. 21, which is a schematic diagram of the working principle of the DC flash welding system, the power source 1301 is the power source of the whole system, and the power source 1301 drives the hydraulic pump station 1302 to enable the hydraulic pump station to output a certain amount according to the control requirements. The pressure oil drives the hydraulic actuator to work. On the other hand, the power source is input to the intermediate frequency inverter 1303, converted into an intermediate frequency alternating current with a frequency of 1000 Hz, and the intermediate frequency alternating current is input to the intermediate frequency welding transformer 10 (integrated rectifier circuit) of the present invention, and the direct current output conforming to the welding requirement is output after step-down rectification. To the rail 1304 to be welded.

Claims

1. A DC welding machine comprising a first set of frames (2, 2'), a second set of frames (6, 6'), a central shaft (8), a clamping cylinder (3), a pushing device ( 4), a top forging cylinder (7) and an intermediate frequency welding transformer (10), wherein the first group of racks

(2, 2') and the second set of frames (6, 6') are hingedly mounted on a common central shaft (8) to form two pairs of clamp clamping mechanisms, each pair of clamp clamping mechanisms A clamping cylinder (3) is mounted between the frames to drive the first set of frames (2, 2') and the second set of frames (6, 6') to rotate about the central axis (8) axis, the first set of machines The frame (2, 2') and the second set of frames (6, 6') are connected by a top forging cylinder (7) to achieve relative movement of the two sets of frames along the axis of the central axis (8), two intermediate frequencies The welding transformers (10) are mounted externally to the first set of racks (2, 2') or the second set of racks (6, 6,), and two intermediate frequency welding transformers (10) are connected in parallel, on each rack Both are equipped with conductive jaws (11-1) and non-conductive jaws (11-

2), the conductive jaw (11-1) is electrically connected to the corresponding intermediate frequency welding transformer (10), and the pushing device (4) comprises two thrust cylinders (1), characterized in that:

a. The central shaft (8) is connected with a synchronous distributor, and the synchronous distributor is a hydraulic cylinder (9).

b. The hydraulic cylinder (9) comprises two first cylinders (9-1) and a second cylinder (9-2) having the same inner diameter, and a first piston (9-

3), the second piston (9-4) and a common piston rod (9-5), the first piston (9-3) and the second piston (9-4) are mounted on the piston rod (9-5) Upper, the first piston (9-3) divides the first cylinder (9-1) into a first hydraulic chamber (9-1-1) and a second hydraulic chamber (9-1-2), and a second piston ( 9-4) Divide the second cylinder (9-2) into a third hydraulic chamber (9-2-1) and a fourth hydraulic chamber (9-2-2), the first hydraulic chamber (9-1-1) ) is connected to the second port (9-9), the second hydraulic chamber (9-1-2) is connected to the third port (9-10), the third hydraulic chamber (9-2-1) and the fourth The oil port (9-7) is connected, and the fourth hydraulic chamber (9-2-2) is connected to the fifth port (9-8).

c. The two push cylinders (1) respectively include a push cylinder (1-7), a push piston (1-1) and a push piston rod (1-6), wherein the push piston (1) 1) Mounted on the push-pull piston rod (1-6), the push-pull piston (1-1) divides the push cylinder (1-7) into the first chamber (1-3) and the second chamber (1) -2), the first cavity (1-3) and the second cavity (1-2) are respectively associated with the first protruding port

(1-4) and the second push port (1-5) are connected,

d. The fourth port (9-7) and the second port (9-9) of the hydraulic cylinder (9) are in communication with the second port (A2) of the three-position four-way solenoid valve (13), hydraulic The fifth port (9-8) and the third port (9-10) of the cylinder (9) are respectively combined with two thrust cylinders

(1) The first thrust port (1-4) is connected, and the second push port (1-5) of the two pusher cylinders (1) are connected in parallel with the three-position four-way solenoid valve (13) The fourth port (B2) is connected,

e, the first port (A1) of the three-position four-way solenoid valve (13) is connected to the oil passage (P),

f. The third port (B1) of the three-position four-way solenoid valve (13) is connected to the return oil path (T) equipped with the check valve (14).

2. The DC welding machine according to claim 1, wherein: the pushing device (4) further comprises a pusher blade seat (4- 1) and a pusher blade (4-2), and the pusher blade seat (4-1) Connect to the push-pull piston rod (1-6) of the push cylinder (1).

3. The DC welding machine according to claim 1, wherein: the hydraulic cylinder (9) further comprises a closable first port (9-) in communication with the first hydraulic chamber (9-1-1). 6), and a closable sixth port (9-11) in communication with the fourth hydraulic chamber (9-2-2).

4. The DC welding machine according to claim 1, wherein: the first group of frames (2, 2') and the second group of frames (6, 6') each comprise two frame type welding Structure of the rack.

The DC welding machine according to claim 4, wherein: any one of the first group of racks and the second group of racks comprises a jaw base (2-6) and a first board (2-1) and the second support plate (2-4), the first plate (2-1) and the second support plate (2-4) are arranged side by side, the first support plate (2-1) The lower part is welded with panels (2-10), and the side hinges are welded side by side with a first hinge (2-7) and a second hinge (2-8), and the panel (2-10) has a through hole (2- 10-1), the first hinge (2-7) and the second hinge (2-8) have a first hinge hole (2-7-1) and a second hinge hole (2-8-1), respectively First board

The upper part of (2-1) has a first cylinder connecting hole (2-1-1), and the upper part of the second supporting plate (2-4) has an axial direction with the first cylinder connecting hole (2-1-1) Corresponding second cylinder connection hole (2-4-1), lower part with third hinge hole (2-4-2), third hinge hole (2-4-2) and first hinge hole (2-7- 1) axially corresponding to the second hinge hole (2-8-1), the first support plate

(2-1) Welding and fixing to the jaw seat (2-6) by the panel (2-10), the first hinge (2-7) and the second hinge (2-8), the second bracket (2) The lower portion of the -4) is welded and fixed to the jaw seat (2-6), and the first connecting plate is welded and fixed between the upper portion of the first supporting plate (2-1) and the upper portion of the second supporting plate (2-4) (2-3), a second connecting plate (2-11) is welded and fixed between the panel (2-10) and the lower portion of the second supporting plate (2-4).

6. The DC welding machine according to claim 5, wherein: the first support plate (2-1) of any one of the sets of racks is provided with two synchronous ears arranged side by side ( 2-9), the second support plate (2-4) of the other frame mated with each set of racks is provided with two synchronous ears (2-9) arranged side by side.

The DC welding machine according to claim 5, wherein: the third hinge hole (2-4-2) on the second support plate (2-4) is welded and fixed at both ends thereof (2-5).

The DC welding machine according to claim 5, characterized in that: the inner end of the first cylinder connecting hole (2-1-1) on the first support plate (2-1) and the second support plate (2-4) The ear pad (2-2) is welded and fixed at the inner end of the second cylinder connection hole (2-4-1).

9. The DC welding machine according to claim 5, wherein: the first support plate (2-1) and the second support plate (2-4) are each provided with a weight reduction through hole (2-1) -2, 2-4-3).

The DC welding machine according to claim 5, characterized in that: the jaw seat (2-6) is provided with a push cylinder mounting hole (2-6-1).

11. The DC welding machine according to claim 5, characterized in that: the jaw seat (2-6) and the panel (2-10) are Made of stainless steel, first plate (2-1), second plate (2-4), first hinge (2-7), second hinge (2-8), first connecting plate (2-3 ) and the second connecting plate (2-11) are made of high-strength steel.

12. The direct current welding machine according to claim 5, characterized in that: the two intermediate frequency welding transformers (10) are respectively mounted on the first support plate of one rack of the first group of racks (2, 2') (2-1) Outside and the second bracket (2- 4) on the outside of the other frame.

13. The DC welding machine according to claim 1, wherein: the conductive jaws (11-1) on the first group of frames (2, 2') pass through the first bus bar (12-1) ) connected to one of the inputs of the intermediate frequency welding transformer (10) on the corresponding side, and the conductive jaws (11-1) on the second set of frames (6, 6') pass through the third bus (12-3) in turn. The top forging rod electrode (7-1) and the second bus bar (12-2) are connected to the other input end of the intermediate frequency welding transformer (10) on the corresponding side.

14. The DC welding machine according to claim 1, wherein: the first group of frames (2, 2') and the second group of frames (6, 6') are connected with a leveling spreader ( 5), leveling spreader (5) includes lifting lugs (5-1) and two tie rod assemblies (5-4), also has screws (5-8), beams (5-6) and U-bolts (5 -7), the lower part of the lifting lug (5-1) has a connecting sleeve (5-1-1), and the connecting sleeve (5-1-1) is sleeved on the screw (5-8), the screw (5) -8) Two adjusting nuts (5-2) are connected to the upper thread, and two adjusting nuts (5-2) are respectively pressed against the two ends of the connecting sleeve (5-1-1), the screws (5-8) A tie rod assembly (5-4) is respectively hinged at both ends thereof, and the tie rod assembly (5-4) includes a fork bolt (5-4-1), a first nut (5-4-2), and a sleeve. (5-4-3), screw plug (5-4-4), insulating spacer (5-4-5), insulating sleeve (5-4-6) and tie rod (5-4-7), The lower head bolt (5-4-1) has an external thread at the lower part, and the sleeve (5-4-3) has an internal thread inside, and the sleeve

The internal thread of (5-4-3) is screwed to the external thread of the lower part of the fork bolt (5-4-1) and locked with the first nut (5-4-2), the sleeve (5-4- 3) The stepped hole (5-4-3-1) in the lower part and the stepped head (5-4-7-1) of the pull rod (5-4-7) pass through the insulating sleeve (5-4-6) and the stepped hole ( 5-4-3-1) Assemble, the internal thread of the sleeve (5-4-3) is screwed with a screw plug (5-4-4), and the screw plug (5-4-4) is pressed against the insulation. On the spacer (5-4-5), the insulating spacer (5-4-5) is pressed against the top surface of the step (5-4-7-1) of the tie rod (5-4-7), Pull rod (5-4-7) The lower part is fixedly connected with the beam (5-6), the U-bolt

(5-7) Pass the end through the socket (5-6-1) on the cross member (5-6) and attach it to the cross member (5-6) with the second nut (5-5).

The DC welding machine according to claim 14, wherein: the sleeve (5-4-3) and the first nut (5-4- 2) are further provided with a lock washer ( 5-4-10).

16. The DC welding machine according to claim 14, wherein: the tie rod (5-4-7) is further provided with a sheath (5-4-8) and a pressure sleeve (5-4-9). The upper end of the sheath (5-4-8) is offset from the lower end of the sleeve (5-4-3), and the lower end of the sheath (5-4-8) is offset from the upper end of the compression sleeve (5-4-9). 5-4-9) The lower end is opposite to the beam (5-6), the lower part of the tie rod (5-4-7) has external thread (5-4-7-2), and the lower part of the tie rod (5-4-7) Through the connecting hole (5-6-2) on the beam (5-6), the external thread (5-4-7-2) The lower part is screwed to the third nut (5-9).

17. The DC welding machine according to claim 14, wherein: the upper portion of the sheath (5-4-8) is further sleeved on the extending sleeve of the insulating sleeve (5-4-6) (5) On the part other than -4-3).

18. The DC welding machine according to claim 14, wherein: the fork head (5-4-1) has a first pin hole (5-4-1-1) on the fork head, Both ends of the screw (5-8) are the connecting ears with the second pin holes (5-8-1), and the connecting ears are inserted in the fork grooves of the corresponding fork bolts (5-4-1) and pass through Connecting pin (5-3) through the first pin hole (5-4-1-1) on the fork of the fork bolt (5-4-1) and the second pin hole of the connecting ear (5-8- 1) And achieve articulation.

The DC welding machine according to claim 1, characterized in that: the clamping cylinder (3) is connected with an insulating oil pipe joint (15) through a pipeline, and the insulating oil pipe joint (15) comprises a first joint (15) -1), second joint (15-6) and nut

(15-7), the mating end surface of the first joint (15-1) is provided with a first sealing ring (15-3), and the mating end surface of the second joint (15-6) is provided with a second sealing ring (15 -5), between the first joint (15-1) and the second joint (15-6) has an insulating plate (15-4), a mating end face of the first joint (15-1) and a second joint (15- 6) the mating end face and the first sealing ring (15-3) and the second sealing ring (15-5) are respectively pressed against the two sides of the insulating plate (15-4), the first joint (15- The joint of 1) has a radial first annular flange (15-1-1), and the joint of the second joint (15-6) has a radial second annular flange (15-6) -1), the second annular flange (15-6-1) has a flanged external thread (15-6-2), the front inner hole of the nut (15-7) and the second joint (15- 6) The flanged external thread (15-6-2) on the second annular flange (15-6-1) is threaded, and the rear inner hole is fitted between the outer circumference of the first joint (15-1) Insulation sleeve (15-2), nut (15-7) has locking step (15-7-1) at the rear end, and locking step (15-7-1) against insulating sleeve (15-2) Upper portion of the first joint (15-1) away from the first annular flange (15-1-1) has a first external thread (15-1-2), and the first external thread (15- 1-2) a first hex head (15-1-3) is disposed between the first annular flange (15-1-1), and the second joint (15-6) is away from the second The annular flange (15-6-1) has a second external thread (15-6-3), and a second external thread (15-6-3) and a second annular flange (15-6-1) There is a second hex head (15-6-4) between them.

20. The direct current welding machine according to claim 19, wherein: the free end of the first joint (15-1) has a sealing cone seat surface (15-1-4); the second joint (15) The free end of -6) has a sealing cone seat (15-6-5).