CN117086457A - Welding electrode in-situ grinding device and method - Google Patents

Abstract

The invention discloses an in-situ grinding device and method for welding electrodes, which relate to the technical field of welding electrode trimming, wherein the upper end and the lower end of a cutter component are respectively provided with a cutter head, the cutter heads at the upper end and the lower end are respectively used for grinding different electrode caps, and a driving mechanism drives each cutter head to rotate; when the welding tool is used, the welding robot is adjusted to control the electrode cap to move so that the first tool bit is positioned at the initial position of the electrode cap to be cut, and a pressing force is generated on the electrode cap; the first driving mechanism drives the first tool bit to cut the central groove and the outer ring groove of the electrode cap; adjusting the welding robot to control the electrode cap to move so that the second tool bit is positioned at the starting position of the electrode cap to be cut and generates a pressing force on the electrode cap; the second tool bit is driven to lift through the second driving mechanism, and simultaneously the first driving mechanism drives the second tool bit to rotate, and the electrode cap is controlled to move in cooperation with the welding robot so as to cut the double-spiral protrusion at the top of the electrode cap. The invention can realize in-situ grinding of the double-helix convex electrode cap and improve the efficiency.

Description

Welding electrode in-situ grinding device and method

Technical Field

The invention relates to the technical field of welding electrode trimming, in particular to a welding electrode in-situ trimming device and method.

Background

Resistance spot welding is a method of applying pressure and current to two or more overlapping workpieces through electrode contact and using a resistance heat-generating molten material between the workpieces to effect joining. The method occupies a main manufacturing procedure in the current manufacture of steel car bodies in car production.

The electrode cap is an important component part in a spot welding system, is used as a welding part of a resistance spot welding device, such as a fixed spot welder, a suspension spot welder, a manipulator spot welder and the like, and is called as the electrode cap because the electrode cap is sleeved on an electrode connecting rod; after the electrode cap is welded for a certain number of times, the electrode cap needs to be polished or replaced due to abrasion, and belongs to welding consumables.

The end structures of the electrode caps commonly used at present mainly comprise flat heads, ball heads, conical heads and the like, and the end surfaces of the electrode caps are symmetrical structures, so that mechanical on-line grinding can be performed. With the development of light-weight technology, aluminum alloy is applied to a vehicle body, the energy density of the electrode cap with the end face in the shape of a double-spiral bulge can be improved, oxide films on the aluminum surface are broken, and spot welding connection between steel and aluminum materials is realized.

However, the end face of the electrode cap with the structure is of an asymmetric structure, so that on-line grinding cannot be performed in the existing technical mode at present, and the electrode cap needs to be manually disassembled and then ground. For the electrode cap with the structure, if an on-line in-situ polishing mode is adopted, one electrode tip can be polished for about 200 times under the condition of no disassembly and then is disassembled and replaced, and the electrode cap needs to be disassembled every time in the manual polishing mode which can be realized at present. It has the following drawbacks: (1) The time consumption of online in-situ grinding is about 20 seconds, the time consumption of the grinding mode after disassembly is up to 5 minutes, and the production efficiency of the resistance spot welding of the production line is seriously affected; (2) Frequent disassembly is extremely easy to cause connection failure between the electrode cap and the electrode rod, and the overall service life is influenced.

Disclosure of Invention

The invention aims to provide a welding electrode in-situ grinding device and method, which are used for solving the problems in the prior art, realizing in-situ grinding of a double-spiral convex electrode cap and improving the efficiency.

In order to achieve the above object, the present invention provides the following solutions:

the invention provides a welding electrode in-situ grinding device which comprises a fixed seat, a driving mechanism and cutter components, wherein cutter heads are arranged at the upper end and the lower end of each cutter component, the cutter heads positioned at different sides are respectively used for grinding different electrode caps, the driving mechanism is in transmission connection with each cutter head and is used for driving each cutter head to rotate, each cutter component comprises two cutter heads and four cutter heads, one cutter head is arranged at the upper end and the lower end of each cutter head, the two cutter heads positioned on the same cutter head are respectively used for grinding each electrode cap, the cutter head on one cutter head is a first cutter head, the cutter head on the other cutter head is a second cutter head, the first cutter head is used for grinding a central groove and an outer ring groove of the electrode cap, and the second cutter head is used for grinding double spiral protrusions at the upper end of the electrode cap after the first cutter head is ground.

Preferably, the cutter assembly further comprises a mounting box, and the cutterhead is mounted in the mounting box.

Preferably, the driving mechanism comprises a first driving mechanism and a second driving mechanism, the first driving mechanism is mounted on the upper end face of the fixing seat and is used for driving each first cutter head and each second cutter head to rotate, and the second driving mechanism is mounted in the mounting box and is used for driving each second cutter head to lift.

Preferably, the number of the first driving mechanisms is two, one of the first driving mechanisms correspondingly drives one cutter head to rotate, and the first driving mechanism is a reciprocating rotary motor.

Preferably, the output end of the second driving mechanism is connected with one of the first driving mechanisms and can drive the first driving mechanism and the second cutter head to lift, and the second driving mechanism is a reciprocating linear motor.

Preferably, an electric box is installed on one side of the fixing seat, and the electric box is electrically connected with the driving mechanism and is used for supplying power to the driving mechanism.

The invention also provides a welding electrode in-situ grinding method, which uses the welding electrode in-situ grinding device in the technical scheme, and comprises the following steps:

s1, adjusting a welding robot to control the electrode cap to move, enabling a first tool bit to be positioned at a to-be-cut starting position of the electrode cap, and generating a pressing force on the electrode cap;

s2, driving the first tool bit to rotate through the first driving mechanism, and enabling the first tool bit to cut the central groove and the outer ring groove of the electrode cap;

s3, adjusting the welding robot to control the electrode cap to move, enabling the second tool bit to be positioned at the initial position of the electrode cap to be cut, and generating a pressing force on the electrode cap;

s4, driving the second tool bit to lift through the second driving mechanism, driving the second tool bit to rotate through the first driving mechanism simultaneously, controlling the electrode cap to move in cooperation with the welding robot, and enabling the second tool bit to cut the double-spiral protrusion at the top of the electrode cap.

Compared with the prior art, the invention has the following technical effects:

the invention provides a welding electrode in-situ grinding device and method, wherein the upper end and the lower end of a cutter component are respectively provided with a cutter head, the cutter heads positioned at different sides are respectively used for grinding different electrode caps, a driving mechanism is in transmission connection with each cutter head and is used for driving each cutter head to rotate, the cutter component is arranged between an upper electrode and a lower electrode, namely between two opposite electrode caps, the cutter head positioned at the upper end grinds the electrode cap positioned above, the cutter head positioned at the lower end grinds the electrode cap positioned below, and the electrode cap with an asymmetric end face structure does not need to be taken down, so that in-situ grinding can be realized, grinding efficiency is improved, and meanwhile, the electrode cap and the electrode rod can avoid connection failure caused by repeated disassembly, the cutter component comprises two cutter discs and four cutter heads, the upper end and the lower end of each cutter disc are provided with one cutter head, the cutter discs are driven to rotate through the driving mechanism, the two cutter heads which are arranged up and down can rotate simultaneously, the two cutter heads which are positioned on the same cutter disc are respectively used for polishing each electrode cap, the cutter head on one cutter disc is a first cutter head, the cutter head on the other cutter disc is a second cutter head, the first cutter head is used for polishing a central groove and an outer ring groove of the electrode cap, and the second cutter head is used for polishing a double-spiral protrusion at the upper end of the electrode cap polished by the first cutter head, so that the electrode cap is polished.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an in-situ grinding device for welding electrodes in accordance with the first embodiment;

FIG. 2 is a cross-sectional view of the first tool tip for sharpening the electrode cap in accordance with the first embodiment;

FIG. 3 is a schematic view of the mounting of a cutterhead and a first cutter head in accordance with the first embodiment;

FIG. 4 is a schematic view of a first cutter head according to the first embodiment;

FIG. 5 is a schematic view of the electrode cap after S2 is completed in the second embodiment;

FIG. 6 is a schematic view of the electrode cap after S4 is completed in the second embodiment;

in the figure: the tool comprises a fixed seat 1-a fixed seat 2-an electric box, a first driving mechanism 3-a second driving mechanism 4-a first tool bit 5-a second tool bit 6-a second tool bit 7-a mounting box 8-an electrode cap 9-a tool head 10-an outer ring groove 11-a double spiral bulge 12-a central groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide a welding electrode in-situ grinding device and method, which are used for solving the technical problems that an electrode cap needs to be removed and trimmed, the efficiency is low and the whole service life is influenced in the existing double-spiral convex electrode.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Example 1

As shown in fig. 1-6, the present embodiment provides a welding electrode in-situ polishing device, including a fixing seat 1, a driving mechanism and a cutter assembly, where the cutter assembly is located between two electrode caps 8 to be polished, and the upper end and the lower end of the cutter assembly are both provided with cutter heads, the cutter heads located at different sides are respectively used for polishing different electrode caps 8, the driving mechanism is in transmission connection with each cutter head and is used for driving each cutter head to rotate, the cutter assembly is disposed between the upper and lower electrodes, that is, between the two opposite electrode caps 8, the cutter head located at the upper end polishes the electrode cap 8 located above, and the cutter head located at the lower end polishes the electrode cap 8 located below, so that the electrode cap 8 with an asymmetric end face structure does not need to be removed, thus realizing in-situ polishing, improving polishing efficiency, and simultaneously, avoiding connection failure between the electrode cap 8 and the electrode rod caused by multiple disassembly; the tool assembly comprises two cutterheads 9 and four tool bits, wherein one tool bit is arranged at the upper end and the lower end of each cutterhead 9, the cutterhead 9 is driven to rotate through a driving mechanism, the two tool bits which are arranged up and down can rotate simultaneously, the two tool bits on the same cutterhead 9 are respectively used for polishing each electrode cap 8, the tool bits on different cutterheads 9 are respectively used for polishing different parts of the electrode caps 8, and further polishing of the electrode caps 8 with various convex shapes can be realized; the cutter heads on one cutter head 9 are the first cutter head 5, the cutter heads on the other cutter head 9 are the second cutter head 6, the first cutter head 5 is used for polishing a central groove 12 and an outer ring groove 10 of the electrode cap 8, the second cutter head 6 is used for polishing an upper double-spiral bulge 11 of the electrode cap 8, and polishing of the electrode cap 8 with the double-spiral bulge 11 can be achieved.

Specifically, the cutter assembly further comprises a mounting box 7, the cutter head 9 is mounted in the mounting box 7, and the mounting box 7 plays a role in mounting and protecting.

The driving mechanism comprises a first driving mechanism 3 and a second driving mechanism 4, the first driving mechanism 3 is mounted on the upper end face of the fixed seat 1 and is used for driving each first cutter head 5 and each second cutter head 6 to rotate so as to drive the electrode cap 8 to displace through rotating a central groove 12 and an outer ring groove 10 of the electrode cap 8 and matching with the welding robot, double-spiral protrusions 11 at the upper end of the electrode cap 8 are realized through rotating the electrode cap 8, and the second driving mechanism 4 is mounted in the mounting box 7 and is used for driving each second cutter head 6 to lift so as to adapt to an arc-shaped curved surface structure of the upper end face of the electrode cap 8.

The number of the first driving mechanisms 3 is two, one first driving mechanism 3 correspondingly drives one cutter disc 9 to rotate, and the first driving mechanism 3 is a reciprocating rotating motor, so that the rotation of the two cutter discs 9 is not affected.

The output end of the second driving mechanism 4 is connected with one of the first driving mechanisms 3, and can drive the first driving mechanism 3 and the second cutter head 6 to lift, the second driving mechanism 4 is a reciprocating linear motor, and therefore rotation and lifting of the second cutter head 6 are not affected, and cutting effect is guaranteed. As a more preferable option, for the second cutter head 6, two reciprocating rotary motors may be provided, that is, one reciprocating rotary motor correspondingly drives one second cutter head 6, and two reciprocating linear motors are provided, so that lifting and rotation of the two cutter heads are not affected, and separate cutting of the double spiral protrusions 11 on the two electrode caps 8 is further realized.

An electric box 2 is arranged on one side of the fixed seat 1, and the electric box 2 is electrically connected with the driving mechanism and is used for supplying power to the driving mechanism.

Example two

The embodiment provides a welding electrode in-situ grinding method, which uses the welding electrode in-situ grinding device in the first embodiment, and comprises the following steps:

s1, adjusting a welding robot to control the electrode cap 8 to move, enabling the first cutter head 5 to be located at a to-be-cut starting position of the electrode cap 8, and generating a pressing force on the electrode cap 8 so as to ensure that the first cutter head 5 can cut the electrode cap 8 when the first driving mechanism 3 is started;

s2, driving the first tool bit 5 to rotate through the first driving mechanism 3, and enabling the first tool bit 5 to cut the central groove 12 and the outer ring groove 10 of the electrode cap 8, as shown in FIG. 5;

s3, adjusting the welding robot to control the electrode cap 8 to move, enabling the second cutter head 6 to be located at the to-be-cut starting position of the electrode cap 8, and generating a pressing force on the electrode cap 8 so as to ensure that the second cutter head 6 can cut the electrode cap 8 when the first driving mechanism 3 is started;

s4, driving the second tool bit 6 to lift through the second driving mechanism 4, driving the second tool bit 6 to rotate through the first driving mechanism 3, controlling the electrode cap 8 to move in cooperation with the welding robot, and enabling the second tool bit 6 to cut the double-spiral protrusion 11 at the top of the electrode cap 8, as shown in FIG. 6.

The welding electrode in-situ polishing device is fixed on a welding production line station, the welding robot is controlled to drive the electrode cap 8 to move to the welding electrode in-situ polishing device, and the electrode cap 8 can be polished in-situ through the cooperation of all tool bits and the tiny displacement of the welding robot to the electrode cap 8, so that the polishing efficiency is improved, the overlong polishing time is avoided, the normal work is influenced, and the connection failure caused by repeated disassembly and assembly of the electrode cap 8 is avoided.

In the actual use process, the shape and the movement track of each tool bit can be adaptively changed according to actual needs by a person skilled in the art so as to meet the polishing requirements of different electrode caps 8.

Examples of specific applications

In the actual grinding process, the rotating speed of the first cutter head 5 is controlled to be 400-600 revolutions per minute, and the grinding time is controlled to be 20-30 seconds; the rotation speed of the second cutter head 6 is 8000 rpm-10000 rpm, the moving speed of the electrode cap 8 (the relative feeding speed of the second cutter head 6) is 100 mm/min-200 mm/min, and the rising speed of the second cutter head 6 is 0.02 mm/sec-0.05 mm/sec according to the radius of curvature of the top end face of the electrode cap 8.

The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.

Claims (7)

1. The utility model provides a welding electrode normal position coping device which characterized in that: the electrode cap polishing device comprises a fixing seat, a driving mechanism and a cutter assembly, wherein cutter heads are arranged at the upper end and the lower end of the cutter assembly, the cutter heads located on different sides are respectively used for polishing different electrode caps, the driving mechanism is in transmission connection with each cutter head and is used for driving each cutter head to rotate, the cutter assembly comprises two cutter heads and four cutter heads, one cutter head is arranged at the upper end and the lower end of each cutter head, two cutter heads located on the same cutter head are respectively used for polishing each electrode cap, one cutter head on the cutter head is a first cutter head, the cutter head on the other cutter head is a second cutter head, the first cutter head is used for polishing a central groove and an outer ring groove of the electrode cap, and the second cutter head is used for polishing double spiral protrusions at the upper end of the electrode cap polished by the first cutter head.

2. The welding electrode in-situ grinding device of claim 1, wherein: the cutter assembly further includes a mounting case, and the cutterhead is mounted in the mounting case.

3. The welding electrode in-situ grinding device of claim 2, wherein: the driving mechanism comprises a first driving mechanism and a second driving mechanism, the first driving mechanism is mounted on the upper end face of the fixing seat and used for driving each first cutter head and each second cutter head to rotate, and the second driving mechanism is mounted in the mounting box and used for driving each second cutter head to lift.

4. A welding electrode in-situ grinding device as defined in claim 3, wherein: the number of the first driving mechanisms is two, one of the first driving mechanisms correspondingly drives one cutter disc to rotate, and the first driving mechanisms are reciprocating rotating motors.

5. The welding electrode in-situ grinding device of claim 4, wherein: the output end of the second driving mechanism is connected with one of the first driving mechanisms and can drive the first driving mechanism and the second cutter head to lift, and the second driving mechanism is a reciprocating linear motor.

6. The welding electrode in-situ grinding device of claim 1, wherein: an electric box is arranged on one side of the fixing seat, and is electrically connected with the driving mechanism and used for supplying power to the driving mechanism.

7. A welding electrode in-situ grinding method is characterized in that: use of the welding electrode in-situ grinding device of any one of claims 1-6, comprising the steps of:

s1, adjusting a welding robot to control the electrode cap to move, enabling a first tool bit to be positioned at a to-be-cut starting position of the electrode cap, and generating a pressing force on the electrode cap;

s2, driving the first tool bit to rotate through the first driving mechanism, and enabling the first tool bit to cut the central groove and the outer ring groove of the electrode cap;

s3, adjusting the welding robot to control the electrode cap to move, enabling the second tool bit to be positioned at the initial position of the electrode cap to be cut, and generating a pressing force on the electrode cap;

s4, driving the second tool bit to lift through the second driving mechanism, driving the second tool bit to rotate through the first driving mechanism simultaneously, controlling the electrode cap to move in cooperation with the welding robot, and enabling the second tool bit to cut the double-spiral protrusion at the top of the electrode cap.