CN216028300U

CN216028300U - Special repair cutter for electrode rod of welding tongs and repair tool thereof

Info

Publication number: CN216028300U
Application number: CN202122102348.XU
Authority: CN
Inventors: 金涛; 冯明; 王威; 丁磊
Original assignee: FAW Volkswagen Automotive Co Ltd
Current assignee: FAW Volkswagen Automotive Co Ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-03-15
Anticipated expiration: 2031-09-01

Abstract

The utility model provides a special repair cutter for electrode rods of welding tongs and a repair tool thereof, comprising a cutter head with a base and a blade, wherein the base is provided with a first end and a second end; the blade is provided with a first inner wall, a first outer wall, a transverse connecting surface, a first vertical connecting surface and a second vertical connecting surface, wherein the transverse connecting surface, the first vertical connecting surface and the second vertical connecting surface are connected with the first inner wall and the first outer wall, cutting edges are arranged at the intersection line of the first vertical connecting surface and the first inner wall, and the cutting edges are distributed on the same conical surface, close to the transverse connecting surface, of the bottom surface and the vertex of the same conical surface faces the direction of the base. The cutter also comprises a sheath which encloses the blade inside the sheath. The utility model has the advantages that the cutter adopts a split sleeved structure design, the processing difficulty of the cutter can be reduced, and the manufacturing cost of the cutter is reduced; after the cutter is connected with the ratchet wheel assembly, the damaged conical surface of the electrode rod can be directly repaired on site quickly, the operation is convenient and quick, the milling efficiency is high, the maintenance efficiency can be improved, and the equipment maintenance stop time is reduced.

Description

Special repair cutter for electrode rod of welding tongs and repair tool thereof

Technical Field

The utility model relates to the field of tools, in particular to a special repair cutter for electrode rods of welding tongs and a repair tool thereof.

Background

In the production process of the spot welding process, the electrode rod of the electrode holder belongs to a quick-wear part, and faults such as abrasion and water leakage of the conical surface of the electrode holder, electrode falling and the like are often caused. Aiming at the problems of water leakage of the conical surface of the electrode rod and falling of the electrode cap, the common solution is as follows:

1. directly replacing the damaged electrode rod;

2. the electrode cap is reinstalled after the copper sheet is padded at the abrasion position of the conical surface of the electrode rod;

3. filling and welding the worn part of the electrode rod by using gas welding, and manually repairing and rubbing the worn electrode rod by using a gang file;

4. and (4) machining the damaged conical surface of the electrode rod, replacing the conical part, and performing repair welding treatment by using brazing.

However, the electrode rod is directly replaced after being damaged, so that the maintenance cost is higher; an electrode cap arranged after a copper sheet is padded at the abrasion part of the conical surface of the electrode rod is easy to fall off and leak water of a motor, and the maintenance efficiency is low; the brass brazing filling and filing are used for repairing the electrode rod, although the maintenance quality can meet the use requirement, the spare part maintenance time is long, and the maintenance efficiency is too low; the conical surface of the electrode rod is repaired by machining, and repair welding treatment is carried out by brazing, so that the maintenance quality is high, but the maintenance efficiency is low, and the maintenance cost is high. The damaged electrode rod is replaced or repaired by the method, so that the equipment is easily stopped for too long time and the maintenance cost is increased, and the vehicle type production is greatly influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a special repair cutter for electrode rods of welding tongs and a repair tool thereof.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a special repair cutter for electrode rods of welding tongs comprises a cutter head, wherein the cutter head comprises a base and a blade, the base is provided with a first end and a second end, and the blade is arranged at the first end of the base; the blade has first inner wall, first outer wall and the transverse connection face, the first vertical connection face and the vertical connection face of second of connecting first inner wall and first outer wall the intersection line department of first vertical connection face and first inner wall sets up the cutting edge, the cutting edge distributes on the same circular conical surface that the bottom surface is close to transverse connection face, summit towards the base direction.

Furthermore, the number of the blades is several, and each blade is provided with a cutting edge; the distance from the intersection line of the first vertical connecting surface and the first inner wall to the conical surface rotating shaft is smaller than the distance from the intersection line of the second vertical connecting surface and the first inner wall to the conical surface rotating shaft.

Further, the base is cylindrical; the cross section of the first outer wall is arc-shaped and is positioned on the same cylindrical surface as the axis of the base; the number of the blades and the number of the cutting edges are three, and the blades and the cutting edges are uniformly distributed on a circumference concentric with the circumference of the base.

Furthermore, the central angle of each first outer wall cross section circular arc is 45-75 degrees, the cutting edge clearance angle is 10-20 degrees, and the maximum clearance of the cutting edge clearance angle is not less than 0.5 mm.

Further, the cutter also comprises a sheath, and the sheath is annular and encloses the blade inside the sheath; preferably, the sheath is in a ring shape with a second inner wall and a second outer wall, and the second inner wall is in interference fit with the first outer wall.

Furthermore, the radius of the circular arc of the cross section of the first outer wall is smaller than that of the circumference of the base, the height of the sheath is not smaller than the length of the blade, and the blade is enclosed inside the sheath.

Furthermore, the radius of the circular arc of the cross section of the first outer wall is equal to the radius of the circumference of the base, the height of the sheath is larger than the length of the blade, and the blade and the base are enclosed in the sheath.

Furthermore, the tool bit is made of high-carbon high-chromium alloy tool steel, and the sheath is made of carbon steel.

Furthermore, a clamping groove is formed in the middle of the second end of the base.

Further, the special repair tool for the electrode rod of the electrode holder using the repair cutter further comprises a ratchet wheel assembly, wherein the ratchet wheel assembly comprises a ratchet wheel wrench and an extension rod; one end of the extension rod is provided with a first connecting part corresponding to the joint of the ratchet wrench, so that the extension rod is connected with the ratchet wrench; the other end of the extension rod is provided with a second connecting part corresponding to the clamping groove of the base, so that the extension rod is connected with the cutter.

The special repair cutter for the electrode rod of the welding tongs and the repair tool thereof have the advantages that:

1. the cutter adopts the design of a split sleeved structure, the processing difficulty of the cutter can be reduced, different materials are selected, and the manufacturing cost of the cutter is greatly reduced.

2. The blade is made of high-carbon high-chromium alloy tool steel, the cutting edge is sharp, the grinding efficiency is high, and the service life is long.

3. After the cutter is connected with the ratchet wheel assembly, the damaged conical surface of the electrode rod can be directly repaired on site quickly, the operation is convenient and quick, the milling efficiency is high, the maintenance efficiency can be improved, and the equipment maintenance stop time is reduced.

Drawings

Fig. 1 is a schematic view of the structure of a tool bit of the repair tool special for electrode rods of the electrode holder of the welding tongs.

FIG. 2 is a schematic diagram of a sheath structure of the special repair cutter for electrode rods of the electrode holder of the utility model.

Fig. 3 is a schematic structural diagram of an embodiment of the repair cutter special for electrode rods of welding tongs.

FIG. 4 is a structural diagram of a cutting edge clearance angle α of the special repair tool for electrode rods of electrode holders according to the present invention.

Fig. 5 is a schematic view of a clamping groove structure of the special repair cutter for the electrode rod of the welding tongs.

Fig. 6 is a schematic structural diagram of an embodiment of the electrode rod dedicated repair tool for electrode holders of the present invention.

In the figure: (1) a cutter head; (11) a blade; (111) a first inner wall; (112) a first outer wall; (113) a transverse connecting surface; (114) a first vertical connecting surface; (115) a second vertical connecting surface; (116) a cutting edge; (12) a base; (121) a card slot; (2) a sheath; (21) a second inner wall; (22) a second outer wall; (3) an electrode rod; (4) cutting; (5) a ratchet wrench; (6) an extension rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "inner", "outer", "height", "length", and the like, indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

The utility model provides a special repair cutter for electrode rods of welding tongs, which comprises a cutter head 1 as shown in figure 1, wherein the cutter head 1 comprises a base 12 and a blade 11, the base 12 is provided with a first end and a second end, and the blade 11 is arranged at the first end of the base 12. The blade 11 has a first inner wall 111, a first outer wall 112, and a transverse joint plane 113, a first vertical joint plane 114, and a second vertical joint plane 115 connecting the first inner wall 111 and the first outer wall 112. The number of the blades 11 is several, each blade 11 is provided with a cutting edge 116, the cutting edge 116 is arranged at the intersection line of the first vertical connecting surface 114 and the first inner wall 111, the cutting edges 116 are distributed on the same conical surface, the bottom surface of the conical surface is close to the transverse connecting surface 113, the vertex points of the conical surface face the direction of the base 12, and the conical surface can extend out of the base 12. Preferably, the cutting edges 116 are uniformly distributed along the conical surface, so that the stress on the blade 11 in all directions is uniform, the cutting edge is cut smoothly, and the cut surface is flat.

The distance from the intersection line of the first vertical connecting surface 114 and the first inner wall 111 to the rotation axis of the conical surface is less than the distance from the intersection line of the second vertical connecting surface 115 and the first inner wall 111 to the rotation axis of the conical surface, so that the cutting edge 116 is inclined towards the inside of the cutter, as shown in fig. 4, the clearance angle alpha of the formed cutting edge is 10-20 degrees, preferably, alpha is 15 degrees, and the maximum clearance of the clearance angle alpha of the cutting edge is not less than 0.5mm, which is beneficial to improving the strength of the cutting edge, effectively reducing the elastic deformation of copper scraps when being cut off and the frictional resistance between the copper scraps and the front surface of the cutter when the copper scraps flow out 4, enabling the scraps to be smoothly discharged, and avoiding the delay and blockage caused during cutting.

Preferably, in order to improve the strength of the blades 11 and reduce the processing difficulty of the tool bit 1, the number of the blades 11 is three, and correspondingly, the number of the cutting edges 116 is three, the tool bit 1 is made of cylindrical high-carbon high-chromium alloy tool steel SKD11, the base 12 is cylindrical, the cross section of each first outer wall 112 is preferably circular arc-shaped and is positioned on the same cylindrical surface with the axis of the base 12, the central angle of the circular arc of the cross section of each first outer wall 112 is 45-75 degrees, and preferably, the central angle of the circular arc of the cross section of each first outer wall 112 is 60 degrees; the cross section of the first inner wall 111 may be a straight line or an arc; the blades 11 and cutting edges 116 are evenly distributed on a circumference concentric with the circumference of the base 12.

The cutter also comprises a sheath 2, the sheath 2 is annular and comprises a continuous annular shape or a discontinuous annular shape with a gap and the like, the blade 11 is enclosed inside the sheath 2 by the sheath 2, and during cutting, cutting chips 4 are contained in the sheath 2, so that the cutting chips 4 are prevented from being splashed, an operator can be protected, the hand of the operator is prevented from being cut, and the safety of the operation process is improved.

Preferably, as shown in fig. 2, the sheath 2 is a circular ring having a second inner wall 21 and a second outer wall 22, and can be consistent with the shape of the base 12, the second inner wall 21 and the first outer wall 112 are in interference fit, the sheath 2 is tightly pressed outside the blade 11, and the blade 11 can be supported, so that the position of the blade 11 is stable, the blade 11 is prevented from being turned outwards due to excessive pressure during operation, the taper requirement of the tapered surface of the electrode rod 3 is ensured, the milling quality of the trimming surface is ensured, and the tapered surface of the repaired electrode rod 3 is uniform.

As shown in fig. 3, as a preferred embodiment, the radius of the circular arc of the cross section of the first outer wall 112 is smaller than the radius of the circumference of the base 12, the height of the sheath 2 is not smaller than the length of the blade 11, preferably, the height of the sheath 2 is the same as the length of the blade 11, the radius of the second outer wall 22 of the sheath 2 is the same as the radius of the circumference of the base 12, the sheath 2 is pressed outside the blade 11, the sheath 2 is buckled on the base 12, and the second outer wall 22 of the sheath 2 is aligned with the outer wall of the base 12, so that only the blade 11 is enclosed inside the sheath 2.

The radius of the circular arc of the cross section of the first outer wall 112 may also be equal to the radius of the circumference of the base 12, so that the first outer wall 112 is aligned with the outer wall of the base 12, the height of the sheath 2 is greater than the length of the blade 11, preferably, the height of the sheath 2 is the height of the cutter head 1, the sheath 2 is pressed on the outer portions of the blade 11 and the base 12, and both the blade 11 and the base 12 are enclosed inside the sheath 2.

The base 12 and the blade 11 are made of high-carbon high-chromium alloy tool steel, the cutting edge of the tool is sharp, the grinding efficiency is high, the service life is long, and the sheath 2 can be made of carbon steel with hardness lower than that of the tool steel, such as 45# steel. The cutter adopts the design of components of a whole that can function independently suit formula structure, has not only reduced the processing degree of difficulty of cutter, and tool bit 1 and sheath 2 can select for use different materials moreover, greatly reduced the manufacturing cost of cutter.

According to the difference of the taper height of the electrode rod 3 (the vertical height of the conical surface of the electrode rod 3), the cutter can be set to different models, for example, the cutter can be set to specifications such as D12 multiplied by 12.5 and D12 multiplied by 14.5, wherein D12 represents that the port diameter of the electrode cap matched with the electrode rod 3 is 12mm, 12.5 and 14.5 represent that the length of the blade 11 is 12.5mm and 14.5mm respectively, the cutter is suitable for the electrode rod 3 with the taper height of 13mm and 15mm respectively, the length of the blade 11 is slightly smaller than the taper height of the electrode rod 3, and the milling efficiency can be improved.

As shown in fig. 6, the cutter can be used in cooperation with a ratchet assembly to form a repair tool special for electrode rods of welding tongs, and the ratchet assembly comprises a ratchet wrench 5 and an extension rod 6; one end of the extension rod 6 is provided with a first connecting part corresponding to the joint of the ratchet wrench 5, so that the extension rod 6 is connected with the ratchet wrench 5; a clamping groove 121 is formed in the middle of the second end of the base 12, and a second connecting portion corresponding to the clamping groove 121 of the base 12 is arranged at the other end of the extension rod 6, so that the extension rod 6 is connected with the cutter. The clamping groove 121 is matched with the joint of the ratchet wrench 5, so that a cutter can be directly connected with the ratchet wrench 5; the clamping groove 121 can be set to be in other shapes, so that the second connecting part is matched with the clamping groove 121 in shape, and a cutter is connected with the ratchet wrench 5 through the extension rod 6; it is also possible to provide the second coupling portion and the joint of the ratchet wrench 5 with the same shape, so that the engaging groove 121 can be adapted to both the joint and the second coupling portion of the ratchet wrench 5. Preferably, as shown in fig. 5, the locking groove 121 includes a square connecting hole, a circular guide hole and a fixing groove, so that the connection of the cutter and the ratchet assembly is more convenient and stable. After the cutter is connected with the ratchet wheel assembly, the operation is convenient, the time and the labor are saved, the damaged conical surface of the electrode rod 3 can be directly and rapidly repaired on site under the condition of not using other auxiliary tools, the maintenance time is shortened, and the maintenance efficiency is improved.

When the tool is used, the electrode rod 3 needing repairing is fixed, the bench clamp can be directly used for clamping one end of the electrode rod 3, the conical surface of the electrode rod 3 is exposed out of the bench clamp, a proper tool is selected according to the model of the electrode rod 3, the tool is connected with the ratchet wheel assembly, the tool is buckled on the conical surface of the electrode rod 3, the ratchet wheel wrench 5 is rotated to drive the tool bit 1 to rotate, milling can be completed, the conical surface of the electrode rod 3 is repaired, and the sealing and connecting effects of the conical surface and an electrode cap are good.

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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The special repair cutter for the electrode rod of the electrode holder is characterized by comprising a cutter head, wherein the cutter head comprises a base and a blade, the base is provided with a first end and a second end, and the blade is arranged at the first end of the base; the blade has first inner wall, first outer wall and the transverse connection face, the first vertical connection face and the vertical connection face of second of connecting first inner wall and first outer wall the intersection line department of first vertical connection face and first inner wall sets up the cutting edge, the cutting edge distributes on the same circular conical surface that the bottom surface is close to transverse connection face, summit towards the base direction.

2. The special repair cutter for electrode rods of welding tongs according to claim 1, wherein the number of the blades is several, and each blade is provided with a cutting edge; the distance from the intersection line of the first vertical connecting surface and the first inner wall to the conical surface rotating shaft is smaller than the distance from the intersection line of the second vertical connecting surface and the first inner wall to the conical surface rotating shaft.

3. The special repair cutter for electrode rods of electrode holders according to claim 2, wherein the base is cylindrical; the cross section of the first outer wall is arc-shaped and is positioned on the same cylindrical surface as the axis of the base; the number of the blades and the number of the cutting edges are three, and the blades and the cutting edges are uniformly distributed on a circumference concentric with the circumference of the base.

4. The special repair cutter for electrode rods of electrode holders as claimed in claim 3, wherein the central angle of each arc of the cross section of the first outer wall is 45 ° to 75 °, the clearance angle of the cutting edge is 10 ° to 20 °, and the maximum clearance of the clearance angle of the cutting edge is not less than 0.5 mm.

5. The special repair cutter for electrode rods of electrode holders according to claim 3, wherein the cutter further comprises a sheath, and the sheath is annular and encloses the blades inside the sheath.

6. The special repair cutter for electrode rods of welding tongs according to claim 5, wherein the sheath is annular with a second inner wall and a second outer wall, and the second inner wall is in interference fit with the first outer wall.

7. The special repair cutter for electrode rods of welding tongs according to claim 6, wherein the radius of the circular arc of the cross section of the first outer wall is smaller than the radius of the circumference of the base, and the height of the sheath is not smaller than the length of the blade, so that the blade is enclosed inside the sheath.

8. The special repair cutter for electrode rods of welding tongs according to claim 6, wherein the radius of the circular arc of the cross section of the first outer wall is equal to the radius of the circumference of the base, and the height of the sheath is greater than the length of the blade, so that the blade and the base are enclosed inside the sheath.

9. The special repair cutter for electrode rods of welding tongs according to claim 5, wherein the material of the base and the blade is high-carbon high-chromium alloy tool steel, and the material of the sheath is carbon steel.

10. The special repair cutter for electrode rods of welding tongs according to any one of claims 1 to 9, characterized in that a notch is provided in the middle of the second end of the base.

11. A special repair tool for electrode rods of welding tongs, characterized in that the tool comprises the special repair tool for electrode rods of welding tongs according to claim 10, and further comprises a ratchet assembly, wherein the ratchet assembly comprises a ratchet wrench and an extension rod; one end of the extension rod is provided with a first connecting part corresponding to the joint of the ratchet wrench, so that the extension rod is connected with the ratchet wrench; the other end of the extension rod is provided with a second connecting part corresponding to the clamping groove of the base, so that the extension rod is connected with the cutter.