CN201645031U - Composite lower electrode structure for projection welding screw - Google Patents
Composite lower electrode structure for projection welding screw Download PDFInfo
- Publication number
- CN201645031U CN201645031U CN2009203182167U CN200920318216U CN201645031U CN 201645031 U CN201645031 U CN 201645031U CN 2009203182167 U CN2009203182167 U CN 2009203182167U CN 200920318216 U CN200920318216 U CN 200920318216U CN 201645031 U CN201645031 U CN 201645031U
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- CN
- China
- Prior art keywords
- lower electrode
- projection welding
- welding screw
- bakelite
- location core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A composite lower electrode structure for a projection welding screw comprises a lower electrode seat, insulating glue, a lower electrode cover, a positioning core and an insulating bakelite sleeve. Cylinders connected into a through hole in a stepped manner are arranged inside the lower electrode cover connected with the lower electrode seat; the size of a small hole matches with that of the projection welding screw; the positioning core sleeved with the insulating bakelite sleeve is arranged inside the lower electrode cover; and a distance ranging from 1mm to 3mm is arranged between the positioning core and the lower electrode seat which are simultaneously fixed by the insulating bakelite sleeve. The composite lower electrode structure effectively protects the projection welding screw, simultaneously ensures the strength of the projection welding screw, generally has service life around one month, can be continuously used by only replacing the lower electrode cover, and reduces production cost.
Description
Technical field
The utility model relates to a kind of field of welding devices, more particularly relates to a kind of projection welding electrode structure.
Technical background
Projection welding is mainly used in the stamping parts of welding low-carbon steel and low-alloy steel.The kind of projection welding is a lot, except that the plate projection welding, also has projection welding, wire rod intersection projection welding, pipe projection welding and the projection welding of sheet material T type etc. of nut, screw class part.Because projection welding has multiple advantage, thereby obtained the utmost point and used widely, the weak point of projection welding is because a plurality of solder joints of a less important weldering, need to use the high-power welding machine of high electrode pressure, high mechanical precision, when securing members such as workpiece project-welding nut, bolt, the quantity of salient point must be enough to bear design load.Projection welding electrode adopts the alloy manufacturing usually, because this class electrode metal has best combination property at aspects such as electrical conductivity, intensity, hardness and hear resistances.Traditional projection welding screw bottom electrode is made up of lower electrode holder and bakelite, bakelite inserts in the lower electrode holder, play the effect of insulation and location during the projection welding screw, but brand-new bakelite will be damaged after tens screws of projection welding, not only do not play insulation and location, also cause the screw shunting, finally burn out the screw thread of screw.
Patent Office of the People's Republic of China discloses a kind of interior recirculated water cooling bottom electrode that is applicable to bolt, nut projection welding, comprise electrode tip holder, be installed in the electrode tip on the electrode tip holder, the location core and be installed in electrode tip and the centre bore of electrode tip holder in insulation sleeve; Passage is arranged at described electrode tip holder bottom, in be provided with penstock, leave the gap between penstock and the passage, as backwater channel; Have a circle cooling water annular groove on electrode tip holder top near first section of electrode, the bottom of cooling water annular groove is respectively arranged with inlet opening that is communicated with penstock and the backwater hole that is communicated with backwater channel.Bottom electrode adopts recirculated water cooling structure in the monoblock type, makes electrode arrive the effect of conduction heat rapidly and avoids burning out of electrode, prolongs the service life of electrode, reduces the consumption of insulating bushing, thereby guarantees the stability of welding quality, reduces production costs.But this complex structure, lower electrode holder play conduction, conductive force, just in case the infiltration situation occurs with regard to danger close.
Summary of the invention
The location core employing of projection welding bottom electrode is a bakelite at present, brand-new bakelite will be damaged after tens screws of projection welding, does not play insulation and location, and the utility model is in order to solve existing projection welding bottom electrode, the replacing frequency is frequent, this problem that production cost improves.
The utility model is achieved through the following technical solutions, a kind of combined type lower electrode arrangement that is used for the projection welding screw, comprise lower electrode holder, bakelite, bottom electrode lid, location core and bakelite cover, the cylinder of the inner stepped through hole of forming by macropore and aperture of bottom electrode lid, be connected with lower electrode holder, the size of aperture matches with the size of projection welding screw, and the bottom electrode lid is inner for being with the location core of bakelite cover, the location core does not contact with lower electrode holder, is insulated bakelite and fixes.Bakelite cover and bakelite have been isolated and have been located contacting of core and lower electrode holder, the bakelite cover also need not directly to contact with workpiece with bakelite, prolonged the service life of bakelite and bakelite cover, guaranteed the quality of projection welding screw, bottom electrode lid convenient disassembly helps changing simultaneously.
The location core is that inside is the cylinder of through hole, and a cylindrical end is provided with shoulder structure, and the location core adopts the 40Cr material, still keeps very high intensity under 1200 ℃, and wearability is good, directly contacts with screw when the projection welding screw, has played the effect of location.
The bakelite cover is that inside is the cylinder of through hole, and a cylindrical end is provided with shoulder structure, and cylinder is embedded in the macropore of bottom electrode lid internal step scalariform through hole.
The shoulder diameter of location core is less than the shoulder diameter of bakelite cover, the location core is embedded in the inside of bakelite cover, the bakelite cover has been isolated contacting of location core and lower electrode holder, the bakelite cover need not directly to contact with workpiece simultaneously, it is not wear-resisting that general bakelite is high temperature resistant, so just prolonged the service life of bakelite and bakelite cover.
Lower electrode holder is made up of cylindrical section and conical section, is provided with blind hole on the conical section end face, is provided with counterbore on the cylindrical section end face, is female thread structure, matches with lower electrode holder, plays the effect of conduction and heat radiation when the projection welding screw.
Compared with prior art; the beneficial effects of the utility model are: a kind of projection welding screw combined type lower electrode arrangement has been protected the projection welding screw effectively; also guaranteed simultaneously the intensity of projection welding screw; the life-span of projection welding screw combined type bottom electrode is generally about 1 month; only need to change the bottom electrode lid and just can continue to use, reduced production cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of bottom electrode lid in the utility model;
Fig. 3 is the structural representation of bakelite in the utility model;
Fig. 4 is the structural representation of location core in the utility model;
Fig. 5 is the structural representation of lower electrode holder in the utility model.
The specific embodiment
Embodiment: it is the cylinder that material is made the inner stepped through hole of being made up of macropore and aperture that bottom electrode lid 1 adopts beryllium copper, the diameter of aperture with matched by the projection welding screw, it is external thread structure that bottom electrode covers an end of 1.
The shoulder diameter of location core 3 is less than the shoulder diameter of bakelite cover 2, and location core 3 is embedded in the inside of bakelite cover 2, is insulated bakelite 5 and fixes, and location core 3 does not contact with lower electrode holder 4.
It is material that lower electrode holder 4 adopts chromium zirconium copper, makes an integral body of being made up of cylindrical section and conical section, is provided with blind hole on the conical section end face, is provided with counterbore on the cylindrical section end face, is female thread structure, matches with bottom electrode lid 1.Bakelite 5 is placed on counterbore bottom, stationary positioned core 3.
Claims (5)
1. combined type lower electrode arrangement that is used for the projection welding screw, comprise lower electrode holder (4), bakelite (5), it is characterized in that: described a kind of combined type lower electrode arrangement that is used for the projection welding screw also comprises bottom electrode lid (1), location core (3) and bakelite cover (2), bottom electrode lid (1) is the cylinder of the inner stepped through hole of being made up of macropore and aperture, be connected with lower electrode holder (4), the size of aperture matches with the size of projection welding screw, bottom electrode lid (1) inside is the location core (3) that is with bakelite cover (2), and location core (3) does not contact with lower electrode holder.
2. a kind of combined type lower electrode arrangement that is used for the projection welding screw according to claim 1 is characterized in that: location core (3) is that inside is the cylinder of through hole, and a cylindrical end is provided with shoulder structure, and location core (3) adopts the 40Cr material.
3. a kind of combined type lower electrode arrangement that is used for the projection welding screw according to claim 1 is characterized in that: bakelite cover (2) is that inside is the cylinder of through hole, and a cylindrical end is provided with shoulder structure.Cylinder is embedded in the macropore of bottom electrode lid (1) internal step scalariform through hole.
4. a kind of combined type lower electrode arrangement that is used for the projection welding screw according to claim 3, it is characterized in that: the shoulder diameter of location core (3) is less than the shoulder diameter of bakelite cover (2), location core (3) is embedded in the inside of bakelite cover (2), and the hole size of location core matches with the size of projection welding screw.
5. a kind of combined type lower electrode arrangement that is used for the projection welding screw according to claim 1, it is characterized in that: lower electrode holder (4) is made up of cylindrical section and conical section, on the conical section end face, be provided with blind hole, on the cylindrical section end face, be provided with counterbore, be female thread structure, match with bottom electrode lid (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203182167U CN201645031U (en) | 2009-12-23 | 2009-12-23 | Composite lower electrode structure for projection welding screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203182167U CN201645031U (en) | 2009-12-23 | 2009-12-23 | Composite lower electrode structure for projection welding screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201645031U true CN201645031U (en) | 2010-11-24 |
Family
ID=43110235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203182167U Expired - Fee Related CN201645031U (en) | 2009-12-23 | 2009-12-23 | Composite lower electrode structure for projection welding screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201645031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049603A (en) * | 2010-12-31 | 2011-05-11 | 潍柴重机股份有限公司 | Electrode head of spot welder |
-
2009
- 2009-12-23 CN CN2009203182167U patent/CN201645031U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049603A (en) * | 2010-12-31 | 2011-05-11 | 潍柴重机股份有限公司 | Electrode head of spot welder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20141223 |
|
| EXPY | Termination of patent right or utility model |