CN111958097A

CN111958097A - Water-cooling tong arm structure

Info

Publication number: CN111958097A
Application number: CN202010925869.2A
Authority: CN
Inventors: 袁忠杰
Original assignee: Hefei Sanyu Electric Co ltd
Current assignee: Hefei Sanyu Electric Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-11-20

Abstract

The invention discloses a water-cooling clamp arm structure which comprises a clamp arm body, an electrode rod and an electrode cap, wherein one end of the clamp arm body is provided with a mounting hole, one end of the electrode rod is connected with the mounting hole, the other end of the electrode rod extends out of the mounting hole and is connected with the electrode cap, a groove which is used for mounting a cooling water pipe and is communicated with the mounting hole is wound on the back of the clamp arm body, and the longitudinal central cross section of the mounting hole and the longitudinal central cross section of the groove are the same. The clamp arm mechanism has the advantages that the cooling water pipe is prevented from being exposed outside the clamp arm body through the arrangement of the groove, the cooling effect of the cooling water pipe on the clamp arm body is improved, meanwhile, the installation hole and the groove are in transition communication through an arc, the installation hole and the longitudinal central section of the groove are in the same section, an adapter arranged between the original electrode rod and the cooling water pipe is omitted, the size of the end head of the clamp arm mechanism is reduced, and the problem of difficulty in installing the interface of the existing cooling water pipe and the electrode rod is solved.

Description

Water-cooling tong arm structure

Technical Field

The invention relates to the technical field of spot welding machine welding, in particular to a water-cooling tong arm structure.

Background

At present, the robot resistance welding technology is widely applied to the field of automobile manufacturing, has strict requirements on the welding process, and puts high requirements on the resistance welding technology. The resistance welding is a welding method in which a columnar electrode is used to form a weld spot between the contact surfaces of two overlapping workpieces during welding. During welding, the workpiece is pressed to be in close contact with the workpiece, then current is switched on, the contact position of the workpiece is melted under the action of resistance heat, and a welding spot is formed after cooling.

When the electrode holder works, the electrode cap at the end part of the electrode rod at the front end generates a large amount of heat when being welded by large current, so that the shape of the electrode is changed or abraded, and the electrode cap needs to be cooled. At present, the existing cooling mode is mainly that grooves are formed on two side faces of a clamp arm body to be connected with an adapter matched with an electrode rod to form a loop, for example, chinese patent disclosure No. CN110524099A discloses a movable arm device of a robot welding clamp, wherein a pipeline is installed in a clamping groove on the side face of the movable arm, and a water distribution block assembly is arranged at the connection position of the pipeline and the electrode rod; or a single or a plurality of pipe holes or annular holes are arranged on the clamp arm body, the inserted water pipe or the copper pipe is bent to be communicated with the inside of the electrode rod according to the shape of the clamp arm to form a cooling water loop, for example, the Chinese patent invention publication No. CN102962573A discloses a suspension welding electrode component, the Chinese patent utility model publication No. CN207402331U discloses a single cooling loop robot welding clamp arm and the Chinese patent utility model publication No. CN207615856U discloses a spot welding special-shaped electrode water cooling structure, and the cooling loop is arranged inside the clamp arm body in the technical scheme disclosed in the patents. Obviously, the water pipe application effect of the water pipe is poor, the water pipe is easy to fall off, the safety problem is easily caused, meanwhile, the installation difficulty of the water-cooling adapter and the water pipe connector is high, the end head of the clamp arm is large, and the processing technology of the water-cooling adapter and the water pipe connector is complex, high in cost and difficult to disassemble and maintain. However, the cooling mechanism of the prior art has not been able to meet the practical requirements according to the different welding work and the different shapes of the clamp arms.

Disclosure of Invention

The invention aims to solve the technical problem of providing a water-cooling clamp arm structure which is anti-drop and easy to install and maintain to cool an electrode cap.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides a water-cooling tong arm structure, includes tong arm body, electrode rod and electrode cap, tong arm body one end is equipped with the mounting hole, electrode rod one end is connected with the mounting hole, and the other end stretches out the mounting hole and connects the electrode cap, the tong arm body back is around being equipped with the recess that is used for blocking condenser tube and communicates with the mounting hole, the mounting hole is same cross-section with recess longitudinal center cross-section.

The cooling water pipe is prevented from being exposed outside the clamp arm body through the arrangement of the groove on the back of the clamp arm body, foreign objects cannot be hooked when the clamp arm structure works, the damage of the cooling water pipe cannot be caused, the safety of the clamp arm structure during working is improved, the contact area of the cooling water pipe attached to the clamp arm body is increased, the cooling effect of the cooling water pipe on the clamp arm body is improved, meanwhile, the groove is communicated with the groove through the installation hole, the installation hole and the longitudinal central section of the groove are in the same section, the groove can be communicated with the installation hole along the same potential, the cooling water pipe is ensured to be connected with the electrode rod in a sealing manner, the electrode cap on the electrode rod is cooled, the adapter arranged between the original electrode rod and the cooling water pipe is cancelled, the volume of the end of the clamp arm mechanism is reduced, and the problem of difficulty in installing the interface of the existing cooling water pipe and the electrode rod is, and the clamp arm structure has simple processing technology, low processing cost and convenient later maintenance.

Preferably, the mounting hole and the groove are in transition communication through an arc.

Preferably, the one end that the electrode pole was kept away from to the mounting hole is still connected transition connection structure, transition connection structure includes transition pipe, sealing washer and connecting pipe, the annular groove has been seted up on the transition pipe, the tight cover of annular groove is established the sealing washer, a transition pipe pot head is established inside the connecting pipe, the transition outer wall closely laminates at the connecting pipe inner wall, just the connecting pipe is hugged closely with transition union coupling's end side the sealing washer, the other end of connecting pipe then stretches into inside the electrode pole and is close to the electrode cap, and a condenser tube pot head is established the one end that the connecting pipe was kept away from to the transition pipe, the transition outer wall closely laminates at the condenser tube inner wall, just the condenser tube is hugged closely with transition union coupling's end side the sealing washer.

Preferably, the baffle is arranged at the center of the groove along the extending direction of the groove, the baffle divides the groove into a first groove and a second groove, so that the cooling water pipe is convenient to install and fix, the cooling water pipe is prevented from falling off in the groove, meanwhile, the contact area of the cooling water pipe attached to the clamp arm body is further increased, and the cooling effect of the cooling water pipe on the clamp arm body is improved.

Preferably, the baffle plate upper surface is equipped with the separation blade for support and press condenser tube, prevent that condenser tube from droing from the recess.

Preferably, the mounting hole is respectively communicated with the first groove and the second groove through a first connecting hole and a second connecting hole, a short tube is arranged in the electrode rod, one end of the short tube is close to the electrode cap, and the other end of the short tube is connected with the first connecting hole in a sealing mode.

Preferably, the depth of each groove is larger than the outer diameter of the cooling water pipe, and the width of each groove is smaller than the outer diameter of the cooling water pipe.

Preferably, the back of the clamp arm body is further provided with an electrode holder, so that the cooling water pipe in the groove can cool the electrode holder, the cooling of the soft electrode arranged on the electrode holder is realized, and the utilization rate of the cooling water is improved.

Preferably, the back of the clamp arm body close to the mounting hole is further provided with an opening parallel to the axial direction of the mounting hole, the opening is communicated with the mounting hole, the clamp arm bodies on two sides of the opening are provided with a plurality of threaded holes perpendicular to the opening, and the threaded holes are provided with locking screws to lock and fix the mounting hole and prevent the electrode rod from rotating in the mounting hole.

Preferably, a C-or X-shaped welding tong arm.

Compared with the prior art, the invention has the beneficial effects that:

1. the cooling water pipe is prevented from being exposed outside the clamp arm body through the arrangement of the groove on the back of the clamp arm body, foreign objects cannot be hooked when the clamp arm structure works, the damage of the cooling water pipe cannot be caused, the safety of the clamp arm structure during working is improved, the contact area of the cooling water pipe attached to the clamp arm body is increased, the cooling effect of the cooling water pipe on the clamp arm body is improved, meanwhile, the groove is communicated with the groove through the installation hole, the installation hole and the longitudinal central section of the groove are in the same section, the groove can be communicated with the installation hole along the same potential, the cooling water pipe is ensured to be connected with the electrode rod in a sealing manner, the electrode cap on the electrode rod is cooled, the adapter arranged between the original electrode rod and the cooling water pipe is cancelled, the volume of the end of the clamp arm mechanism is reduced, and the problem of difficulty in installing the interface of the existing cooling water pipe and the electrode rod is, and the clamp arm structure has simple processing technology, low processing cost and convenient later maintenance.

2. Divide into first recess and second recess with the recess through the baffle, the condenser tube's of being convenient for installation with fixed prevents that condenser tube from droing in the recess, has also further increased the area of contact of condenser tube laminating on the tong arm body simultaneously, improves the cooling effect of condenser tube to the tong arm body.

3. Through the setting of transition pipe and sealing washer, prevented that the condition of leaking between condenser tube and the connecting pipe from taking place, improve the leakproofness to stretch into the electrode pole through the connecting pipe inside and be close to the electrode cap, make the interior cooling water of intaking can directly cool off the electrode cap, and the outlet pipe is arranged from the end of electrode pole to the cooling water after the cooling, improves the cooling effect to the electrode cap.

4. Through the setting of separation blade for support and press condenser tube, further prevent that condenser tube from droing in the recess.

5. The electrode holder is arranged on the back face of the clamp arm body, so that the cooling water pipe in the groove can cool the electrode holder, the cooling of the soft electrode arranged on the electrode holder is realized, and the utilization rate of cooling water is improved.

Drawings

Fig. 1 is a schematic structural diagram of a water-cooled clamp arm structure according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a portion of a clamp arm body according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a transition connection structure according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a transition duct according to an embodiment of the present invention;

FIG. 6 is an enlarged view of A in FIG. 3;

FIG. 7 is another structural view of FIG. 6;

FIG. 8 is a schematic structural diagram according to a second embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a third embodiment of the present invention;

FIG. 10 is a schematic structural view of a body of a three-jawarm according to an embodiment of the present invention;

FIG. 11 is a partial cross-sectional view of a third embodiment of the present invention;

fig. 12 is another partial cross-sectional view of the third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

Referring to fig. 1 to 3, the embodiment discloses a water-cooling clamp arm structure, which includes a clamp arm body 1, an electrode rod 2 and an electrode cap 3, in the embodiment, the clamp arm body 1 is a clamp arm of a C-shaped welding clamp, a mounting hole 11 is formed at one end of the clamp arm body 1, one end of the electrode rod 2 is hermetically connected with the mounting hole 11, the other end of the electrode rod extends out of the mounting hole 11 and is connected with the electrode cap 3, a groove 12 is formed along the back of the clamp arm body 1, so that a cooling water pipe 9 is clamped inside the groove 12, the cooling water pipe 9 is prevented from being exposed outside the clamp arm body 1, and the cooling water pipe 9 may be a polyketone ethylene pipe or a copper pipe with certain flexibility; can not catch on foreign object at this tong arm structure during operation, more can not cause condenser tube 9's damage, improve the security of tong arm structure during operation, simultaneously, still increased condenser tube 9 and laminated area of contact on tong arm body 1, improve condenser tube 9 and to the cooling effect of tong arm body 1 to this tong arm structure processing technology is simple and the processing cost is low, and later maintenance is also convenient.

The back that the tong arm body 1 is close to mounting hole 11 still sets up the opening 13 parallel with mounting hole 11 axial direction, opening 13 and mounting hole 11 intercommunication, the both sides tong arm body 1 of opening 13 is equipped with a plurality of screw holes 14 perpendicular with opening 13, in this embodiment, sets up two screw holes 14, be provided with locking screw (not shown in the figure) on the screw hole 14, specifically, after electrode rod 2 installed to mounting hole 11, through rotating locking screw locks the tong arm body 1 of opening 13 both sides, and the width of opening 13 reduces, and then realizes locking fixed to mounting hole 11, prevents that electrode rod 2 from rotating in mounting hole 11.

Mounting hole 11 and recess 12 pass through circular arc transition intercommunication, just mounting hole 11 and the vertical central cross-section of recess 12 are same cross-section for recess 12 can communicate with 11 advantages of the mounting hole, thereby guarantee that cooling water pipe 9 can be along with the 2 sealing connection of electrode rod specifically can be through sealed glue sealing connection, also can pass through transition connection structure 7 sealing connection to the realization is to the electrode cap 3 cooling on the electrode rod 2, has cancelled the adapter that sets up between original electrode rod 2 and the cooling water pipe 9, has not only reduced this tong arm mechanism end volume, has solved current cooling water pipe 9 and electrode rod 2's the interface installation degree of difficulty problem.

Specifically, referring to fig. 4 and 5, the transition connection structure 7 includes a transition pipe 71, a sealing ring 72 and a connecting pipe 73, an annular groove 711 is formed in the transition pipe 71, the sealing ring 72 is tightly sleeved on the annular groove 711, one end of the transition pipe 71 is sleeved inside the connecting pipe 73, the outer wall of the transition pipe 71 is tightly attached to the inner wall of the connecting pipe 73, the side surface of the end of the connecting pipe 73 connected with the transition pipe 71 is tightly attached to the sealing ring 72, the other end of the connecting pipe 73 extends into the electrode rod 2 and approaches the electrode cap 3, so that the cooling water in the cooling water pipe 9 can directly cool the electrode cap 3, and the cooled cooling water is discharged into the water outlet pipe from the end of the electrode rod 2, thereby improving the cooling effect on the electrode cap 3. Similarly, a pot head of condenser tube 9 is established in the one end that connecting pipe 73 was kept away from to transition pipe 71, transition pipe 71 outer wall closely laminates at condenser tube 9 inner wall, just the end side that condenser tube 9 and transition pipe 71 are connected is hugged closely on the sealing washer 72, has realized being connected of condenser tube 9 and connecting pipe 73 like this to through transition pipe 71 and sealing washer 72's setting, the condition of leaking between condenser tube 9 and the connecting pipe 73 has been prevented and has taken place.

Further, referring to fig. 6, the baffle 4 is arranged in the center of the groove 12 along the extending direction of the groove 12, the groove 12 is divided into a first groove 121 and a second groove 122 by the baffle 4, generally, the cooling water pipe 9 includes a water inlet pipe and a water outlet pipe, the first groove 121 is used for installing the water inlet pipe, the second groove 122 is used for installing the water outlet pipe, the water inlet pipe is separated from the water outlet pipe, the water inlet pipe and the water outlet pipe are conveniently installed and fixed, the water inlet pipe and the water outlet pipe are prevented from falling off in the groove 12, meanwhile, the contact area of the cooling water pipe 9 attached to the caliper arm body 1 is further increased, and the cooling effect of the cooling water pipe 9 on the caliper arm body.

Still further, the upper surface interval of baffle 4 is provided with a plurality of screw holes, 5 bottom surfaces of separation blade be fixed with screw hole complex screw (not shown in the figure), make separation blade 5 can the pivoted fix the upper surface of baffle 4, the width of separation blade 5 is not more than the thickness of baffle 4, length is greater than the width of recess 12, specifically, refer to fig. 6, before condenser tube 9 installs, rotate separation blade 5 as for baffle 4 is parallel, makes things convenient for condenser tube 9's installation, refers to fig. 7, after condenser tube 9 installs, rotates again separation blade 5, makes it perpendicular with baffle 4 for support and press condenser tube 9, prevent that condenser tube 9 from coming off in the recess 12.

Still further, the degree of depth of recess 12 all is greater than condenser tube 9's external diameter, the width of recess 12 all is less than condenser tube 9's external diameter for condenser tube 9 can pressfitting recess 12 inside respectively, and not only further prevent that condenser tube 9 from droing from recess 12, can also increase condenser tube 9 and tong arm body 1's area of contact, improve condenser tube 9 and to the cooling effect of tong arm body 1.

The working principle of the invention is as follows: firstly, after the electrode rod 2 is installed in the installation hole 11, the clamp arm bodies 1 on two sides of the opening 13 are locked by rotating the locking screw, the width of the opening 13 is reduced, further the locking and fixing of the installation hole 11 are realized, the electrode rod 2 is prevented from rotating in the installation hole 11, then the baffle 5 is rotated to be parallel to the baffle 4, the cooling water pipe 9 is installed in the groove 12, the installation hole 11 is communicated with the groove 12 in a circular arc transition mode, the longitudinal central cross sections of the installation hole 11 and the groove 12 are the same, the groove 12 can be communicated with the installation hole 11 in a homeopathic mode, the cooling water pipe 9 can be connected with the electrode rod 2 in a sealing mode, the original adapter is omitted, after the cooling water pipe 9 is installed, the baffle 5 is rotated to be perpendicular to the baffle 4 and used for pressing against the cooling water pipe 9, and the cooling water pipe 9 is prevented from falling off from the groove 12, thereby preventing the cooling water pipe 9 from being exposed to the outside of the caliper arm body 1. Finally, when this tong arm structure during operation, through the inlet tube injection cooling water toward first recess 121 is inside to inside electrode rod 2 cools off electrode cap 3, and the cooling water is discharged through the inside outlet pipe of second recess 122 again simultaneously, has realized the cooling to electrode cap 3.

Example two

Referring to fig. 8, in this embodiment, on the basis of the first embodiment, the electrode holder 6 is further disposed at one end of the back surface of the forceps arm body 1, which is far away from the electrode rod 2, specifically, the electrode holder 6 is fixed at the back surface of the forceps arm body 1 through a screw, so that the cooling water pipe 9 in the groove 12 can cool the electrode holder 6, and further the cooling of the soft electrode mounted on the electrode holder 6 is achieved, and the utilization rate of the cooling water is improved.

EXAMPLE III

Referring to fig. 9 and 12, the difference between the first embodiment and the second embodiment is that the electrode holder body 1 is a holder arm of an X-shaped electrode holder, the mounting hole 11 and the groove 12 form a straight included angle, and the mounting hole 11 and the groove 12 cannot be directly communicated and close to the electrode cap 3 through an arc transition, referring to fig. 11 and 12, the first groove 121 and the mounting hole 11 and the second groove 122 are respectively communicated by providing a first connecting hole 15 and a second connecting hole 16, the short tube 8 is disposed in the electrode rod 2, one end of the short tube 8 is close to the electrode cap 3, the other end of the short tube 8 extends out of the electrode rod 2 and is hermetically connected with the first connecting hole 15, a water outlet of the water inlet tube is hermetically connected with the first groove 121 disposed inside the holder arm body 1, and cooling water sequentially flows from the first groove 121, the first connecting hole 15 and the short tube 8 disposed inside the holder arm body 1 to an inner wall of the electrode cap, the communication between the water inlet pipe and the short pipe 8 is realized, the water inlet of the water outlet pipe is hermetically connected with the second groove 122 arranged inside the tong arm body 1, and cooling water flows into the water drainage pipe through the second connecting hole 16 and the second groove 122 arranged inside the tong arm body 1 to be output, so that the circulating output of the cooling water is ensured.

Furthermore, the end part of the short pipe 8 close to the electrode cap is in an oblique angle shape, so that the contact area of cooling water and the electrode cap 3 is increased, and the cooling effect on the cooling cap is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a water-cooling tong arm structure which characterized in that: the clamp arm comprises a clamp arm body, an electrode rod and an electrode cap, wherein one end of the clamp arm body is provided with a mounting hole, one end of the electrode rod is connected with the mounting hole, the other end of the electrode rod extends out of the mounting hole to be connected with the electrode cap, the back of the clamp arm body is provided with a groove used for clamping a cooling water pipe and communicated with the mounting hole, and the mounting hole and the longitudinal center section of the groove are in the same section.

2. The water-cooled jawarm structure of claim 1, wherein: the mounting hole is in transition communication with the groove through an arc.

3. The water-cooled jawarm structure of claim 1, wherein: the one end that the electrode pole was kept away from to the mounting hole is still connected transition connection structure, transition connection structure includes transition pipe, sealing washer and connecting pipe, the annular groove has been seted up on the transition pipe, the tight cover of annular groove is established the sealing washer, transition pipe pot head is established inside the connecting pipe, the outer wall of transition pipe closely laminates at the connecting pipe inner wall, just the connecting pipe is hugged closely with transition union coupling's end side the sealing washer, the other end of connecting pipe then stretches into inside the electrode pole and is close to the electrode cap, and the one end that the connecting pipe was kept away from to the transition pipe is established to condenser tube pot head, the outer wall of transition pipe closely laminates at the condenser tube inner wall, just the condenser tube is hugged closely with transition union coupling's end side the.

4. The water-cooled jawarm structure of claim 1, wherein: the baffle is arranged at the center of the groove along the extending direction of the groove, and the baffle divides the groove into a first groove and a second groove.

5. The water-cooled jawarm structure of claim 4, wherein: the baffle plate is arranged on the upper surface of the baffle plate.

6. The water-cooled jawarm structure of claim 4, wherein: the mounting holes are respectively communicated with the first groove and the second groove through a first connecting hole and a second connecting hole, a short pipe is arranged in the electrode rod, one end of the short pipe is close to the electrode cap, and the other end of the short pipe is connected with the first connecting hole in a sealing mode.

7. The water-cooled jawarm structure of claim 1, wherein: the depth of the groove is larger than the outer diameter of the cooling water pipe, and the width of the groove is smaller than the outer diameter of the cooling water pipe.

8. The water-cooled jawarm structure of claim 1, wherein: the back of the clamp arm body is also provided with an electrode seat.

9. The water-cooled jawarm structure of claim 1, wherein: the clamp arm comprises a clamp arm body and is characterized in that an opening parallel to the axial direction of the mounting hole is further formed in the back face, close to the mounting hole, of the clamp arm body, the opening is communicated with the mounting hole, a plurality of threaded holes perpendicular to the opening are formed in the clamp arm body on two sides of the opening, and locking screws are arranged on the threaded holes.

10. The water-cooled jawarm structure of claim 1, wherein: the clamp arm body is a C-shaped or X-shaped welding clamp arm.