CN210306209U - Lower electrode structure device for ensuring bolt projection welding and workpiece bottom hole concentricity - Google Patents
Lower electrode structure device for ensuring bolt projection welding and workpiece bottom hole concentricity Download PDFInfo
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- CN210306209U CN210306209U CN201921024678.8U CN201921024678U CN210306209U CN 210306209 U CN210306209 U CN 210306209U CN 201921024678 U CN201921024678 U CN 201921024678U CN 210306209 U CN210306209 U CN 210306209U
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Abstract
The utility model relates to a bolt projection welding electrode structure device, concretely relates to guarantee bolt projection welding and concentric bottom electrode structure device of work piece bottom hole. The bottom of the lower electrode groove is provided with an insulating pad, a spring is arranged above the insulating pad, the upper end of the spring is contacted with the lower plane of a flange at the bottom of the pin bush through a guide column at the bottom of the pin bush, the upper end of the pin bush passes through a lower electrode cover and a bottom hole of a workpiece, and the bottom end of the lower electrode cover is contacted with the upper plane of the adjusting washer; the lower electrode cover is fixedly connected with the lower electrode through threads; the upper part of the pin bush is provided with a blind hole, the excircle of the upper part of the pin bush is coaxial and closely in clearance fit with the bottom hole of the workpiece, and the excircle of the upper part of the pin bush is coaxial and closely in clearance fit with the projection welding bolt. When the lower electrode cover is screwed with the lower electrode, the top of the pin bush is 1-2mm higher than the workpiece. The utility model discloses a cotter and work piece bottom hole and the inseparable clearance fit of projection welding bolt realize that projection welding bolt welds back bolt and work piece bottom hole concentric to guarantee projection welding bolt and weld back position degree requirement.
Description
Technical Field
The utility model relates to an electrode structure device, concretely relates to guarantee bolt projection welding and concentric lower electrode structure device of work piece bottom hole.
Background
According to the traditional projection welding bolt lower electrode structure, after a bolt is placed in a workpiece, due to the fact that the gap between the root of the bolt and a bottom hole of the workpiece is large, if the workpiece is not positioned or is positioned unstably, the bolt is prone to being welded, and not only is the position accuracy of the bolt influenced, but also the welding quality is influenced. In order to ensure the quality, the workpiece must be accurately positioned, a plurality of positions are required to be positioned when a plurality of bolts are required to be welded on some workpieces, the area of a workbench of the projection welding machine is small, and therefore a very complicated welding fixture is required to be used for positioning the workpiece, if the welding fixture is not special for a special machine, the fixture needs to be replaced during production every time, and the problems of complexity, low efficiency and high cost are solved.
Disclosure of Invention
In order to solve the problem, the utility model provides a safe, low-cost assurance bolt projection welding and concentric bottom electrode structure device of work piece bottom hole
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a lower electrode structure device for ensuring the concentricity of bolt projection welding and a workpiece bottom hole,
the bottom of the lower electrode groove is provided with an insulating pad, a spring is arranged above the insulating pad, the upper end of the spring is contacted with the lower plane of a flange at the bottom of the pin bush through a guide column at the bottom of the pin bush, the upper end of the pin bush passes through a lower electrode cover and a bottom hole of a workpiece, and the bottom end of the lower electrode cover is contacted with the upper plane of the flange;
the lower electrode cover is fixedly connected with the lower electrode through threads;
the upper part of the pin bush is provided with a blind hole, the excircle of the upper part of the pin bush is coaxial and closely in clearance fit with the bottom hole of the workpiece, and the excircle of the upper part of the pin bush is coaxial and closely in clearance fit with the projection welding bolt.
According to the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, when the lower electrode cover is screwed down with the lower electrode, the top of the pin bush is 1-2mm higher than the workpiece.
According to the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, when the lower electrode cover is screwed down with the lower electrode, the distance between the salient point of the projection welding bolt and the upper surface of the workpiece is H-0.5 mm; and H is the sum of the thickness of the workpiece and the distance between the top of the pin sleeve and the workpiece.
The lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece is characterized in that the pin bush is made of KCF.
The lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece is characterized in that the lower end of the blind hole is provided with a soft material.
According to the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, a plurality of adjusting washers are arranged between the lower electrode cover and the flange (5-3).
The lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece is characterized in that a cooling water pipe is communicated with the bottom end of the lower electrode.
The invention has the beneficial effects that:
1. according to the invention, the bolt sleeve is in close clearance fit with the bottom hole of the workpiece and the projection welding bolt, so that the bolt is concentric with the bottom hole of the workpiece after the projection welding bolt is welded, and the requirement on the post-welding position degree of the projection welding bolt is ensured.
2. In the welding process, under the effect of spring, the pin bush is automatic downstream, avoids the pin bush top to be heated and produces deformation damage.
3. The traditional bakelite insulating sleeve only plays an insulating role, a workpiece needs to be positioned by a special tool, and a projection welding bolt cannot be positioned. In order to control the height from the workpiece before projection bolt welding, soft material is added into the pin sleeve to adjust the bolt height.
4. In order to solve the problem that the height of the pin bush extending out of the electrode cover is not changed after the electrode cover is frequently polished, a gasket is additionally arranged at the lower part of the pin bush to adjust the height of the pin bush.
5. The lower electrode can become thinner after being repaired and polished, the height of the pin bush extending out of the electrode cover can be changed, and an adjusting gasket is additionally arranged between the lower electrode cover and the flange to adjust the height of the lower electrode cover.
6. The pin bush is made of KCF insulating materials, has good wear resistance and high strength, and is not easy to damage in the welding process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the present invention in a welded state.
Fig. 3 is a schematic view of the state of the present invention at the completion of welding.
The meanings of the symbols in the figures: the welding method comprises the following steps of 1 projection welding bolt, 1-1 salient point, 1-2 bolt root groove, 2 workpieces, 3 lower electrode cover, 3-1 thread, 4 soft materials, 5 pin bush, 5-1 blind hole, 5-2 guide column, 5-3 flange, 5-4 pin bush excircle, 5-5 pin bush inner circle, 6 spring, 7 insulating pad, 8 lower electrode, 8-1 groove, 9 cooling water pipe and 10 adjusting washer.
Detailed Description
The following is a detailed description of the present invention, but is not intended to limit the invention in any way.
Example 1
As shown in fig. 1, a lower electrode structure device for ensuring the projection welding of a bolt to be concentric with a bottom hole of a workpiece,
an insulating pad 7 is arranged at the bottom of a groove 8-1 of the lower electrode 8, a spring 6 is arranged above the insulating pad 7, the upper end of the spring 6 is in contact with the lower plane of a flange 5-3 at the bottom of the pin bush 5 through a guide column 5-2 at the bottom of the pin bush 5, and the pin bush 5 can move up and down under the action of the spring 6. The upper end of the pin bush 5 passes through the lower electrode cover 3 and a bottom hole of the workpiece 2, and the bottom end of the lower electrode cover 3 is contacted with the upper plane of the flange 5-3;
the lower electrode cover 3 and the lower electrode 8 are fixedly connected through threads 3-1;
the upper part of the pin bush is provided with a blind hole 5-1, the excircle 5-4 at the upper part of the pin bush is coaxial with the bottom hole of the workpiece and is in close clearance fit, and the excircle 5-5 at the upper part of the pin bush is coaxial with the projection welding bolt 1 and is in close clearance fit.
According to the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, when the lower electrode cover 3 and the lower electrode 8 are screwed, the top of the pin bush 5 is 1-2mm higher than the workpiece.
According to the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, when the lower electrode cover 3 and the lower electrode 8 are screwed, the distance between the salient point 1-1 of the projection welding bolt 1 and the upper surface of the workpiece 2 is H-0.5 mm; h is the sum of the thickness of the workpiece 2 and the distance that the top of the pin sleeve 5 is higher than the workpiece 2.
The lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece is characterized in that the pin bush 5 is made of KCF.
In the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, the lower end of the blind hole 5-1 is provided with the soft material 4.
In the lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece, a plurality of adjusting washers 10 are arranged between the lower electrode cover 3 and the flange 5-3.
The lower electrode structure device for ensuring the concentricity of the projection welding of the bolt and the bottom hole of the workpiece is characterized in that the bottom end of the lower electrode 8 is communicated with the cooling water pipe 9.
The working process of the invention is as follows:
when the lower electrode cap 3 and the lower electrode 8 are screwed, the projection welding bolt 1 is inserted into the blind hole 5-1 through the bottom hole of the workpiece 2, so that the bottom of the projection welding bolt 1 is in contact with the soft material 4. According to the different thicknesses of the workpieces 2, whether the adjusting washers 10 are added or how many adjusting washers 10 are added between the lower electrode cover 3 and the flange 5-3 is selected, so that the tops of the pin bushings 5 are 21-2 mm higher than the workpieces. Adjusting the height of the soft material 4 to ensure that the distance between the salient point 1-1 on the projection welding bolt 1 and the upper surface of the workpiece 2 is H-0.5 mm; h is the sum of the thickness of the workpiece 2 and the distance that the top of the pin sleeve 5 is higher than the workpiece 2.
During welding, the upper electrode presses the projection welding bolt 1 downwards, the projection welding bolt 1 moves downwards, and when the bolt salient point 1-1 is in contact with the workpiece 2 instantly (at the moment, the projection welding bolt 1 and the workpiece 2 start to be welded, and the position of the projection welding bolt 1 is fixed), as shown in figure 2, 0.5mm of the top end part of the KCF pin bush 5 is inserted into a bottom hole of the workpiece, so that the projection welding bolt 1 and the bottom hole of the workpiece 2 are ensured to be concentric during welding. And (3) continuing pressing and welding, wherein the KCF pin sleeve 5 moves downwards and completely enters the lower electrode cover 3, so that the phenomenon that the top end part of the KCF pin sleeve 5 is hooped in the groove 1-2 at the root of the bolt due to thermal deformation and the welded workpiece cannot be taken down is avoided, and the welding is finished, as shown in figure 3.
When the lower electrode cover 3 is welded, the surface of the lower electrode cover 3 can be damaged, the lower electrode cover 3 can be polished for saving cost, the electrode cover can be thinned, the protruding length of the top of the KCF pin bush 5 can be increased, and the lower electrode cover is easy to break. At this time, a plurality of adjustment washers 10 are provided between the lower electrode cap 3 and the flange 5-3 according to the degree of wear of the lower electrode cap 3.
Claims (7)
1. A lower electrode structure device for ensuring the concentricity of bolt projection welding and a workpiece bottom hole is characterized in that,
an insulating pad (7) is arranged at the bottom of a groove (8-1) of a lower electrode (8), a spring (6) is arranged above the insulating pad (7), the upper end of the spring (6) is in contact with the lower plane of a flange (5-3) at the bottom of a pin bush (5) through a guide column (5-2) at the bottom of the pin bush (5), the upper end of the pin bush (5) penetrates through bottom holes of a lower electrode cover (3) and a workpiece (2), and the bottom end of the lower electrode cover (3) is in contact with the upper plane of the flange (5-3);
the lower electrode cover (3) is fixedly connected with the lower electrode (8) through threads (3-1);
the upper part of the pin bush is provided with a blind hole (5-1), the outer circle (5-4) at the upper part of the pin bush is coaxial and closely matched with the bottom hole of the workpiece in a clearance way, and the inner circle (5-5) at the upper part of the pin bush (5) is coaxial and closely matched with the projection welding bolt (1) in a clearance way.
2. A lower electrode structure device for ensuring bolt projection welding and concentricity with a bottom hole of a workpiece as claimed in claim 1, wherein when the lower electrode cover (3) is screwed with the lower electrode (8), the top of the pin bush (5) is 1-2mm higher than the workpiece.
3. A lower electrode structure device for ensuring bolt projection welding to be concentric with a bottom hole of a workpiece according to claim 1, characterized in that when the lower electrode cover (3) is screwed with the lower electrode (8), the distance between the salient point (1-1) of the projection welding bolt (1) and the upper surface of the workpiece (2) is H-0.5 mm; h is the sum of the thickness of the workpiece (2) and the distance that the top of the pin sleeve (5) is higher than the workpiece (2).
4. A lower electrode structure device for ensuring bolt projection welding and concentricity of bottom hole of workpiece as claimed in claim 1, characterized in that the material of said pin bush (5) is KCF.
5. A lower electrode structure device for ensuring bolt projection welding and concentricity with a bottom hole of a workpiece as claimed in claim 1, wherein the lower end of the blind hole (5-1) is provided with a soft material (4).
6. A lower electrode structure device for ensuring bolt projection welding to be concentric with a bottom hole of a workpiece according to claim 1, characterized in that a plurality of adjusting washers (10) are provided between the lower electrode cover (3) and the flange (5-3).
7. A lower electrode structure device for ensuring bolt projection welding and concentricity with a bottom hole of a workpiece according to claim 1, characterized in that a cooling water pipe (9) is communicated with the bottom end of the lower electrode (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921024678.8U CN210306209U (en) | 2019-07-03 | 2019-07-03 | Lower electrode structure device for ensuring bolt projection welding and workpiece bottom hole concentricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921024678.8U CN210306209U (en) | 2019-07-03 | 2019-07-03 | Lower electrode structure device for ensuring bolt projection welding and workpiece bottom hole concentricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210306209U true CN210306209U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921024678.8U Active CN210306209U (en) | 2019-07-03 | 2019-07-03 | Lower electrode structure device for ensuring bolt projection welding and workpiece bottom hole concentricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210306209U (en) |
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2019
- 2019-07-03 CN CN201921024678.8U patent/CN210306209U/en active Active
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Address after: 110141, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone, Shenyang, Liaoning Patentee after: Shenyang Laijin Auto Parts Co., Ltd Address before: 110141, No. 12, No. 1, development road, Shenyang economic and Technological Development Zone, Shenyang, Liaoning Patentee before: SHENYANG LAIJIN AUTOMOBILE PARTS Co.,Ltd. |
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