CN212665174U - Welding machine structure capable of controlling distance between two ends of stirrup - Google Patents

Abstract

The utility model relates to a controllable stirrup both ends head interval's welding machine structure, including clamping device, the last electrode that can up-and-down motion, clamping device includes the tong that is located the last electrode both sides respectively, the tong includes the fixed baseplate, the sliding plate that can freely slide vertically on the fixed baseplate and be equipped with the counterpiece, be equipped with location portion on the fixed baseplate, be equipped with the guide arm on the sliding plate, the guide arm is upwards movable to pass location portion, the cover has the pressure spring on the guide arm above the location portion and the pressure spring is compressed between the rand of location portion and guide arm upper end so that the sliding plate is in the floating balance state; the two pairs of claws have a height difference in the vertical direction so that the two ends of the clamped stirrup have corresponding height difference; the upper electrode is provided with a linkage plate, and the linkage plate is provided with a press-connection part which can drive the corresponding side pair claws to move downwards in the downward movement process so as to adjust the height difference of the two ends of the stirrup successively through driving. In the pressure welding process, the vertical spacing at the two ends of the stirrup is always controlled, the vertically overlapped postures are stable, and the welding quality is effectively improved.

Description

Welding machine structure capable of controlling distance between two ends of stirrup

Technical Field

The utility model belongs to the technical field of welding among the machine tool equipment, concretely relates to welding machine structure of controllable stirrup both ends head interval.

Background

The common structure is that two output ends of a transformer of the common structure are respectively connected to two electrode plates, the electrode plates are respectively connected with electrodes (also called electrode chucks and electrode pressure heads) in a conductive mode, the electrodes and the electrode plates are usually detachably connected, the welding use is convenient when the electrodes are relatively fixed, the electrodes can be conveniently taken down and replaced after being consumed, or the electrodes can be taken down and installed again after being reworked to form a pressure welding surface, and the common structure is related to CN109079064A and CN 207629082U.

In the application of welding the stirrup, two electrode plates are usually respectively arranged on an upper connecting cantilever and a lower connecting cantilever of a welding machine so as to clamp and weld two free ends of the stirrup, an air cylinder is arranged on the upper connecting cantilever, and a telescopic rod of the air cylinder extends downwards and is connected with an upper electrode so as to drive the upper electrode to move up and down to be far away from or close to the lower electrode. The bent stirrup can be seen from fig. 1, two free ends 101 of the bent stirrup are opposite and in a staggered state, the staggered height difference is not fixed, when welding, the two free ends 101 of the stirrup 100 are firstly pressed and overlapped up and down through upper and lower electrodes and then are connected by electric welding, and preferably, the two free ends 101 of the stirrup 100 are connected to a straight line in a melting way. However, in the process of compression welding, the electrodes directly contact and transmit force to drive the free ends of the stirrups, so that the two free ends 101 of the stirrups 100 are difficult to keep a standard vertically overlapped posture until the two free ends are connected in a melting mode, the welding quality is not high, and the welding quality consistency of the stirrups after welding is poor.

Disclosure of Invention

The above is not enough to prior art, the to-be-solved technical problem of the utility model is to provide a controllable stirrup both ends head vertical height difference's welding machine structure, avoid by the relatively poor problem of stirrup welding uniformity that electrode direct contact and biography power drive stirrup's free end brought, gain through the effect that the transmission mode of the two free end intervals of stirrup change power simultaneously improves the welding quality among the effective control welding process.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a welding machine structure capable of controlling the distance between two ends of a stirrup comprises a resistance welding machine and a clamping device, wherein the resistance welding machine comprises a lower electrode and an upper electrode capable of moving up and down, the clamping device comprises two clamping hand units which are respectively positioned at two sides of the upper electrode and are used for correspondingly clamping two free ends of the stirrup, the clamping hand unit comprises a vertical fixed base plate, a sliding plate is vertically connected on the fixed base plate in a sliding manner, a pair claw for clamping the free end of the stirrup is connected on the sliding plate, the fixed base plate is provided with a transverse convex positioning part, the sliding plate is connected with a guide rod which extends vertically and upwards, the guide rod upwards movably penetrates through the positioning part, and a spiral pressure spring is sleeved on a guide rod section which penetrates through the positioning part, the spiral pressure spring is compressed between the positioning part and the clamping ring at the upper end of the guide rod so as to bear the weight of the sliding plate through the spiral pressure spring and enable the sliding plate to be in a floating balance state; the pair claws of the two clamping hand units are vertically positioned between the upper electrode and the lower electrode and have a height difference so that two free ends of the clamped stirrup have corresponding height difference and are to be welded; the upper electrode is connected with a linkage plate which moves synchronously with the upper electrode, and two sides of the linkage plate are respectively provided with a press connection part which can drive the opposite claws at the corresponding sides to move downwards in the downward movement process of the linkage plate so as to adjust the height difference of two free ends of the stirrup by driving.

According to the technical scheme, the upper electrode and the lower electrode are arranged up and down oppositely so that stirrups can be clamped and welded through opposite movement, the upper electrode and the lower electrode are connected to the base frame body, the base frame body is provided with the connecting support arm and is connected with the vertical driving unit through the connecting support arm, and the output end of the vertical driving unit is connected with the linkage plate and the upper electrode downwards in sequence.

Furthermore, a sliding groove is arranged on one side surface of the sliding plate, a sliding rail matched with the sliding groove is arranged on one side surface of the fixed base plate, the sliding plate is connected to the sliding rail through the sliding groove, and the other side surface of the sliding plate is connected with a cylinder body for driving the clamping action of the paired claws and is connected with the paired claws through the cylinder body in a driving way; the cylinder bodies of the two clamping hand units are respectively positioned at two sides of the upper electrode and below the press-connection part at the corresponding side so as to press the cylinder bodies through the press-connection part in the downward movement process of the linkage plate to drive the opposite claws to move downward.

Furthermore, the guide rod is connected to the upper surface of the sliding plate, an auxiliary pressure spring is sleeved on a guide rod section between the sliding plate and the positioning portion, and the auxiliary pressure spring is compressed between the upper surface of the sliding plate and the lower surface of the positioning portion.

Furthermore, a compression bar with adjustable vertical height is connected to the linkage plate and is formed into the compression joint part through the compression bar.

Furthermore, a through internal thread hole is formed in the linkage plate, a vertical bolt is connected to the linkage plate through the internal thread hole, the bolt is formed into the pressing rod, the screw end of the bolt faces downwards, and the end face of the screw end is formed into the pressing part.

Further, a nut is sleeved on a screw rod section between the linkage plate and the head of the bolt and used for fastening and positioning the bolt after the vertical height is adjusted through rotation.

Further, the two clamping hand units are connected to the movable and positioned conveying frame through the fixed base plate so as to clamp the stirrups through the two pairs of claws along with the movement of the conveying frame, and the two clamping hand units are positioned on the required positions opposite to the resistance welding machine along with the movement of the conveying frame.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a welding machine structure, the height difference to the claw with the help of two tong units of deliberate design will be controlled the vertical interval of two free ends of the stirrup that is centre gripping also in corresponding height difference range to in the course of upper electrode and linkage plate downstream, drive the higher claw of a pair down through a crimping portion earlier, reduce the height difference of two free ends of stirrup, upper electrode also just in time contacts the stirrup at this moment; when the two free ends of the stirrup are in up-and-down overlapped contact, the other press-connection part drives the other pair of claws to move downwards at the same time, and at the moment, the whole stirrup moves downwards in a stable state of up-and-down overlapped contact of the two free ends; after contacting the lower electrode, conducting current to weld, and welding the end of the stirrup on a straight line after the end of the stirrup is softened and melted; in the melting process, the upper electrode and the linkage plate need to move downwards for a certain distance (the diameter of the stirrup), and in the process, the free end of the stirrup located below is abutted against the lower electrode and cannot move downwards any more, so that certain elastic deformation needs to occur to meet the requirement that the two ends of the stirrup are melted and welded on a straight line when the upper electrode and the linkage plate move downwards.

2. The utility model discloses a welding machine structure, the crimping to two free ends of stirrup is closing gradually and is overlapping about implementing and making it, crimping portion can contact in positions such as sliding plate, do not have direct contact stirrup to pass power, at the in-process that whole crimping was welded, the vertical interval of two free ends of stirrup also is in controlled state always, the gesture of overlapping from top to bottom is also stabilized through the centre gripping to the claw, stagger around the pressure welding in-process can not, the welding uniformity of the stirrup that the welding came out is fine, can effectively improve the welding quality.

Drawings

Fig. 1 is a schematic view of a stirrup as an object of pressure welding mentioned in the background art;

FIG. 2 is a schematic structural diagram of a welding machine with controllable spacing between two ends of a stirrup according to an embodiment (for convenience of illustration, the carriage is hidden);

FIG. 3 is a schematic view of the resistance welder shown in FIG. 2 (with the clamping device and the crimping bolt removed);

FIG. 4 is a schematic view of a single schematic clamping device in an example embodiment;

FIG. 5 is a side view of FIG. 2;

the welding machine comprises a resistance welding machine 1, an upper electrode 2, a lower electrode 3, a linkage plate 4, a bolt 41, a crimping part 42, a base frame body 5, a connecting support arm 51, a vertical driving unit 52, an output end 53, a clamping device 6, a clamping hand unit 7, a fixed base plate 71, a positioning part 711, a sliding plate 72, a guide rod 721, a clamping ring 722, a cylinder 73, a pair claw 74, a spiral pressure spring 75, an auxiliary pressure spring 76, a conveying frame 8, a stirrup 100 and a free end 101.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 2-5, an exemplary embodiment of a welding machine structure capable of controlling a distance between two ends of a stirrup includes a resistance welding machine 1 and a clamping device 6, where the resistance welding machine 1 includes a lower electrode 3 and an upper electrode 2 capable of moving up and down, the clamping device 6 includes two clamping hand units 7 respectively located on left and right sides of the upper electrode 2 for correspondingly clamping two opposite free ends of a bent back stirrup, the clamping hand unit 7 includes a vertical fixed base plate 71, a sliding plate 72 is freely and vertically slidably connected to the fixed base plate 71, the free vertical sliding is free, i.e., the relative sliding friction resistance is small, the sliding plate is in free-falling body sliding connection, a pair claw 74 for clamping the free ends of the stirrup is connected to the sliding plate 72, a positioning portion 711 protruding in a transverse direction is arranged on an upper portion of the fixed base plate 71, the positioning portion 711 is located above the sliding plate 72, the sliding plate 72 is connected with a guide rod 721 extending vertically upwards, the guide rod 721 moves upwards to penetrate through the positioning part 711 and a guide rod section penetrating through the positioning part 711 is sleeved with a spiral pressure spring 75, the spiral pressure spring 75 is compressed between the positioning part 711 and a clamping ring 722 arranged at the upper end of the guide rod 721, the sliding plate 72 is freely and vertically connected to the fixed base plate 71 in a sliding manner, so that the weight of the sliding plate 72 is borne by the resilience of the spiral pressure spring 75, a balance is achieved, the sliding plate 72 is in a floating balance state, at the moment, the sliding plate 72 can still vertically slide upwards and downwards through external force, and correspondingly, the spiral pressure spring 75 is extended or further compressed.

Referring to fig. 4 and 5, in the floating equilibrium state of the sliding plate 72, the pair of claws 74 of the two gripper units 7 have a height difference in the vertical direction so that the two free ends of the clamped stirrup can also have a corresponding height difference, and the pair of claws 74 of the two gripper units 7 are also located between the upper electrode 2 and the lower electrode 3 so that the two free ends of the clamped stirrup are in the positions to be welded.

The upper electrode 2 is connected with a linkage plate 4 which moves synchronously with the upper electrode, both sides of the linkage plate 4 are respectively provided with a press-connection part 42 which can drive the opposite claw 74 on the corresponding side to move downwards in the process that the linkage plate 4 moves downwards so as to further adjust the height difference of the two free ends of the stirrup through driving, and during implementation, the sliding plate 72 on the corresponding side can be pressed and driven in the process that the linkage plate 4 moves downwards, so that the opposite claw 74 is driven.

According to the welding machine structure of the embodiment, the height difference of the pair of claws 74 of the two clamping hand units 7 which are designed deliberately is used for controlling the vertical distance between the two free ends of the clamped stirrup to be within the corresponding height difference range, and after the upper electrode 2 and the linkage plate 4 move downwards and move for a certain stroke, the pair of claws 74 with the higher free ends of the clamped stirrup are driven to move downwards through the one pressing part 42, so that the height difference between the two free ends of the stirrup is reduced, it can be understood that at the moment, the lower surface of the upper electrode 2 is also just in contact with the upper surface of the free end (the higher one) of the stirrup, when the two free ends of the stirrup are in up-and-down overlapped contact, the other pair of claw pressing parts 74 is also driven to move downwards at the same time, and at the moment, the two free ends of the stirrup are in up-and-down overlapped contact stable state, after contacting the lower electrode 3, the welding is carried out by conducting current, the ends of, The melting and welding are in a straight line, namely in the melting process, the upper electrode 2 and the linkage plate 4 need to move downwards for a certain distance (the diameter of the stirrup), and in the process, the free end of the stirrup positioned below generates certain elastic deformation so as to meet the requirement that the upper electrode 2 and the linkage plate 4 move downwards to enable the two ends of the stirrup to be melted and welded and connected on the straight line.

Like this, the crimping to two free ends of stirrup is implementing and is closing gradually and be overlap from top to bottom through crimping portion 42, and crimping portion 42 can contact in sliding plate 72 isotocations, does not have direct contact stirrup to pass power, and at the in-process that whole crimping was welded, the vertical interval of two free ends of stirrup is in controlled state always, and the gesture of overlapping from top to bottom also obtains firmly through the centre gripping to claw 74, and the welding uniformity of the stirrup that welds out is fine, has effectively improved the welding quality.

In the implementation process, the free end of the stirrup clamped by the lower pair of claws 74 can be positioned above the lower electrode 3 and just contacts the upper surface of the lower electrode 3, so that in the downward movement process of the upper electrode 2 and the linkage plate 4, only one side of the crimping part 42 is needed to work, namely the crimping part 42 drives the pair of claws 74 with the higher free end of the stirrup clamped to move downward, the height difference of the two free ends of the stirrup is reduced, when the two free ends of the stirrup are in up-and-down overlapped contact, the current welding is started, the upper electrode 2 and the linkage plate 4 finally move downward by a stirrup diameter stroke, so that the two ends of the stirrup are melted and welded and connected on a straight line, under the use method, in the last stirrup diameter moving downward stroke of the upper electrode 2 and the linkage plate 4, the free end of the stirrup positioned below does not need to be subjected to elastic deformation, but is not easy to realize from the aspect of control, the free ends of the stirrups held by the lower pair of claws 74 do not always remain in direct contact with the upper surface of the lower electrode 3, since the electrode is always worn.

The upper electrode 2 and the lower electrode 3 are arranged vertically and oppositely so as to clamp stirrups and weld the stirrups through opposite movement, the upper electrode 2 and the lower electrode 3 are both connected to the base frame body 5, the base frame body 5 is provided with a connecting support arm 51 and is connected with the vertical driving unit 52 through the connecting support arm 51, and the output end 53 of the vertical driving unit 52 is connected with the linkage plate 4 and the upper electrode 2 downwards in sequence.

A sliding groove is arranged on one side surface of the sliding plate 72, a sliding rail matched with the sliding groove is arranged on one side surface of the fixed base plate 71, the sliding plate 72 is connected to the sliding rail through the sliding groove, a cylinder body 73 for driving the clamping action of the claw pair 74 is connected to the other side surface of the sliding plate 72, the claw pair 74 is driven and connected through the cylinder body 73, the claw pair 74 comprises two claw plates which are opposite in parallel, the claw plates are positioned below the cylinder body 73 and extend downwards, and in order to enable the clamping position of the stirrup clamped at each time on the claw pair 74 to be always consistent, grooves are formed on the opposite surfaces of the two claw plates, and the grooves can be V-shaped grooves so that the stirrup can fall into the grooves to keep the consistency of; the cylinders 73 of the two gripper units 7 are respectively located on the left and right sides of the upper electrode 2 and below the crimping portions 42 on the corresponding sides.

Thus, the structure is compact, and the pressing part 42 presses the cylinder 73 to drive the opposite claw 74 to move downwards in the process of moving downwards the linkage plate 4.

The guide rod 721 is connected to the upper surface of the sliding plate 72, an auxiliary compression spring 76 is sleeved on a guide rod section between the sliding plate 72 and the positioning part 711, and the auxiliary compression spring 76 is compressed between the upper surface of the sliding plate 72 and the lower surface of the positioning part 711.

In this way, it is advantageous to make the difference in height of the two free ends of the stirrup held by the two claws 74 of the two gripper units 7 correspond to the difference in design height of the two pairs of claws 74. The auxiliary compression springs 76 are added, the two compression springs are both in a pre-pressing working state, meanwhile, the clamping unit 7 is also in a floating balance state, the floating balance state of the clamping unit 7 contains larger potential energy capable of keeping the designed height difference of the pair of claws 74, and when the stirrups are clamped, the elasticity of the stirrups can be better overcome (when the auxiliary compression springs 76 are not arranged, the weight of the sliding parts of the clamping unit 7 is completely relied on), so that the distance between the two free ends is reduced to the designed height difference of the two pairs of claws 74.

Wherein, a compression bar with adjustable vertical height is connected on the linkage plate 4 and is formed into the compression joint part 42 through the compression bar.

In this way, in the case of electrode consumption or the like, the aforementioned controlled pressure welding process can be maintained at all times by adjusting the height of the pressure contact portion 42; it is convenient to ensure that when the crimping part 42 drives the pair of claws 74 which are higher at the free end of the clamped stirrup to descend, the lower surface of the upper electrode 2 just contacts the upper surface of the free end of the stirrup.

The linkage plate 4 is provided with a through internal threaded hole and connected with a vertical bolt 41 through the internal threaded hole, the bolt 41 forms the pressure lever, the screw end of the bolt 41 faces downwards, and the end face of the screw end forms the crimping part 42. A nut (not shown in the figure) is sleeved on a screw rod section between the linkage plate 4 and the head of the bolt 41 and is used for fastening and positioning after the bolt 41 rotates to adjust the vertical height.

Thus, the implementation is simple and the positioning is convenient.

Referring to fig. 4, the process of clamping the stirrup by the clamping units 7 may be manual, that is, the positions of the two clamping units 7 (fixed base plates 71) relative to the resistance welder 1 are fixed, and the stirrup is clamped manually; for more automation and further effective use of the gripper units 7 in a floating state, the fixed base plate 71 of the gripper unit 7 may be connected to the movable and positionable carriage 8 so as to grip the stirrup with the movement of the carriage 8 by means of the two pairs of claws 74, and after gripping the stirrup, the gripper units 7 are positioned with the movement of the carriage 8 in a desired position relative to the resistance welding machine 1, i.e. in the position described above. If the lower electrode 3 is fixed, the conveying frame 8 is required to be away from the resistance welding machine 1 (retreating) first, then descend to clamp the stirrups and then return, and the conveying plate can be understood as the existing mechanical arm; in this embodiment, in order to make carriage 8's control simpler, sliding connection is on base frame body 5 around bottom electrode 3 is for, slide rail and drive actuating cylinder have been adopted, in order can give way the operating space for the front end of base frame body 5 after the rear end towards base frame body 5 slides, bottom electrode 3 slides the back towards the rear end of base frame body 5, carriage 8 need not to keep away from resistance welder 1 (retreat) again, only need down centre gripping stirrup, then go upward reset can, 3 roll-outs of bottom electrode are located 2 below of top electrode, can implement follow-up crimping welding process.

A brief description will be given of how to make the height difference between the two free ends of the clamped stirrup correspond to the designed height difference between the two pairs of claws 74 in the process of descending the carriage 8 and clamping the stirrup by the two pairs of claws 74. A convex part can be arranged on the table top below the conveying frame 8, so that two free ends of the bent stirrup are positioned on the table top (usually, the lower tail end is reserved), the other free end is positioned on the convex part on the table top (usually, the higher head end is drawn), the conveying frame 8 descends, the lower surfaces of the opposite claws 74 of the two clamping hand units 7 are respectively abutted to the upper surfaces of the table top and the convex part, the auxiliary pressure spring 76 is further compressed, the spiral pressure spring 75 is properly extended and still in a compression state, the opposite claw 74 which is designed to be relatively higher in a floating balance state is matched with the convex part and correspondingly abutted to the convex part, and the auxiliary pressure spring 76 is also compressed to a larger extent because of being abutted to the convex part. The two pairs of claws 74 respectively clamp the free ends of the stirrups (fall into the V-shaped grooves of the claw plates), the conveying frame 8 moves upwards, the pair of claws 74 of the two clamping hand units 7 are restored to the original floating balance state under the action of the self weight of the sliding part and the auxiliary pressure spring 76, and therefore the distance between the two free ends of the clamped stirrups is driven to be controlled and adjusted to the designed height difference of the two pairs of claws 74.

For convenience of understanding, the present embodiment is further described with data as an example, and the lower electrode slides towards the rear end of the base frame to provide an operation space for the front end of the base frame; the diameter of the clamping target stirrup is 10 mm; in a floating balance state, the design height difference of the pair claws of the two clamping hand units is 15 mm; the bulge is 40mm higher than the table-board, and the two free ends of the stirrup are respectively arranged on the bulge and the table-board, namely, the two free ends are staggered by 40mm (center distance), so that the staggered height difference of the two free ends of different stirrups can be kept consistent; the conveying frame moves downwards, the lower surfaces of the claws of the two clamping hand units are respectively abutted to the upper surfaces of the table board and the boss, the auxiliary compression springs of the clamping hand units abutted to the boss have more compression amounts of 25mm, the two pairs of claws respectively clamp the free ends of the stirrups, the conveying frame moves upwards, the claws of the two clamping hand units restore to the original height difference of 15mm, the vertical distance between the two free ends of the stirrups is also 15mm (center distance), the diameter of the stirrups is 10mm, and the minimum distance between the two free ends of the stirrups is 5 mm; the lower electrode slides out and is positioned below the upper electrode; under linkage plate and last electrode pressure, the crimping portion that higher pair of claw corresponds contacts its cylinder body earlier (simultaneously, the upper electrode contacts the stirrup free end of this pair of claw centre gripping), and this pair of claw is descended thereupon, and the interval of the two free ends of stirrup reduces to when overlapping the contact from top to bottom, and the crimping portion contact this side cylinder body of opposite side, then the whole stable state that is two free ends of stirrup overlapping the contact from top to bottom descends, after contacting the lower electrode, the welding is implemented to the conduction current, and the stirrup end is softened, the melting links to each other on a straight line until the welding.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (8)

1. The utility model provides a welding machine structure of controllable stirrup both ends head interval, includes resistance welder and clamping device, resistance welder includes bottom electrode and the last electrode that can up-and-down motion, its characterized in that: the clamping device comprises two clamping hand units which are respectively positioned at two sides of the upper electrode and used for correspondingly clamping two free ends of the stirrups, each clamping hand unit comprises a vertical fixed base plate, a sliding plate can be vertically and slidably connected onto the fixed base plate, a pair claw for clamping the free ends of the stirrups is connected onto the sliding plate, a transverse protruding positioning part is arranged on the fixed base plate, a guide rod which vertically and upwardly extends is connected onto the sliding plate, the guide rod upwardly and movably penetrates through the positioning part, a spiral pressure spring is sleeved on a guide rod section which penetrates through the positioning part, and the spiral pressure spring is compressed between the positioning part and a clamping ring at the upper end of the guide rod so as to bear the weight of the sliding plate through the spiral pressure spring and enable the sliding;

the pair claws of the two clamping hand units are vertically positioned between the upper electrode and the lower electrode and have a height difference so that two free ends of the clamped stirrup have corresponding height difference and are to be welded;

the upper electrode is connected with a linkage plate which moves synchronously with the upper electrode, and two sides of the linkage plate are respectively provided with a press connection part which can drive the opposite claws at the corresponding sides to move downwards in the downward movement process of the linkage plate so as to adjust the height difference of two free ends of the stirrup by driving.

2. The welding machine structure capable of controlling the distance between the two ends of the stirrup as claimed in claim 1, wherein: the upper electrode and the lower electrode are oppositely arranged up and down so as to clamp stirrups and weld the stirrups through opposite movement, the upper electrode and the lower electrode are both connected to the base frame body, the base frame body is provided with a connecting support arm and is connected with the vertical driving unit through the connecting support arm, and the output end of the vertical driving unit is sequentially connected with the linkage plate and the upper electrode downwards.

3. The welding machine structure capable of controlling the distance between the two ends of the stirrup as claimed in claim 1, wherein: a sliding groove is arranged on one side surface of the sliding plate, a sliding rail matched with the sliding groove is arranged on one side surface of the fixed base plate, the sliding plate is connected to the sliding rail through the sliding groove, and the other side surface of the sliding plate is connected with a cylinder body for driving the clamping action of the pair of claws and is connected with the pair of claws through the cylinder body in a driving way; the cylinder bodies of the two clamping hand units are respectively positioned at two sides of the upper electrode and below the press-connection part at the corresponding side so as to press the cylinder bodies through the press-connection part in the downward movement process of the linkage plate to drive the opposite claws to move downward.

4. The welding machine structure capable of controlling the distance between the two ends of the stirrup as claimed in claim 1, wherein: the guide rod is connected to the upper surface of the sliding plate, an auxiliary pressure spring is sleeved on a guide rod section between the sliding plate and the positioning portion, and the auxiliary pressure spring is compressed between the upper surface of the sliding plate and the lower surface of the positioning portion.

5. The welding machine structure capable of controlling the distance between the two ends of the stirrup as claimed in claim 1, wherein: the linkage plate is connected with a pressing rod with adjustable vertical height and is formed into the pressing part through the pressing rod.

6. The structure of claim 5, wherein the two ends of the stirrup are spaced from each other by a gap controllable between the two ends of the stirrup: set up the internal thread hole that runs through on the linkage board and pass through internal thread jogged joint has vertical bolt, the bolt forms into the depression bar, the screw rod end of bolt down and the terminal surface of screw rod end form into crimping portion.

7. The welding machine structure of claim 6, wherein the welding machine structure is characterized in that: and a nut is sleeved on a screw rod section between the linkage plate and the head of the bolt and is used for fastening and positioning the bolt after the vertical height is adjusted through rotation adjustment.

8. The structure of a welder capable of controlling the distance between the two ends of a stirrup according to any one of claims 1 to 7, wherein: the two clamping hand units are connected to the movable and positioned conveying frame through the fixed base plate so as to clamp the stirrups through the two pairs of claws along with the movement of the conveying frame, and the two clamping hand units are positioned on the required position opposite to the resistance welding machine along with the movement of the conveying frame.

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