JPS6336877B2 - - Google Patents
Info
- Publication number
- JPS6336877B2 JPS6336877B2 JP2803879A JP2803879A JPS6336877B2 JP S6336877 B2 JPS6336877 B2 JP S6336877B2 JP 2803879 A JP2803879 A JP 2803879A JP 2803879 A JP2803879 A JP 2803879A JP S6336877 B2 JPS6336877 B2 JP S6336877B2
- Authority
- JP
- Japan
- Prior art keywords
- workpiece
- hole
- countersunk screw
- guide tube
- welding
- 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
Links
- 238000003466 welding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Description
【発明の詳細な説明】
この発明は雄ネジを、例えば自動車の車体の一
部となるダツシユパネル等の薄板ワークに溶接す
るプロジエクシヨン溶接法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projection welding method for welding a male thread to a thin plate work such as a dash panel that is a part of an automobile body.
従来、この種ワークに雄ネジを溶接する場合、
頭部の下面側に３つの突起を備えたプロジエクシ
ヨンボルトを雄ネジとして用い、このボルトを予
めワークに形成した穴に挿入し、上部電極と下部
電極とでボルトを加圧した後に通電し、突起をワ
ークに溶着させるようにしていた。（例えば、特
開昭53−133547号公報参照）
しかしながら、この溶接法によれば、雄ネジが
溶接専用のものとなつて高価になり、しかも、車
室内への水の浸入を防ぐため後工程でボルトの頭
部廻りにシーラーを塗らなければならないという
欠点があつた。 Conventionally, when welding male threads to this type of workpiece,
A projection bolt with three protrusions on the underside of the head is used as a male screw, and this bolt is inserted into a hole previously formed in the workpiece, and the bolt is pressurized with the upper and lower electrodes, and then energized. , the protrusion was welded to the workpiece. (For example, see Japanese Patent Application Laid-Open No. 53-133547.) However, according to this welding method, the male thread is used only for welding, making it expensive. Moreover, it is necessary to prevent water from entering the vehicle interior during post-processing. However, there was a drawback that sealer had to be applied around the bolt head.
この発明は上記の欠点に着目してなされたもの
であり、溶接専用の雄ネジでなく、十字溝を頭部
に設けた皿ネジを用い、予めワークに形成した穴
に皿ネジのテーパ面を当接させて確実にリングプ
ロジエクシヨン溶接を行ない、しかも、ワークの
面に直角に溶接するために皿ネジのネジ部を、下
部電極の穴に嵌挿した電気絶縁性のガイドチユー
ブで傾かないように案内して溶接するようにした
ものである。 This invention was made by focusing on the above-mentioned drawbacks, and instead of using a male screw exclusively for welding, a countersunk screw with a cross groove in the head is used, and the tapered surface of the countersunk screw is inserted into a hole previously formed in the workpiece. In order to ensure ring projection welding by contacting and welding at right angles to the surface of the workpiece, the threaded part of the countersunk screw is fitted into the hole of the lower electrode with an electrically insulating guide tube that prevents it from tilting. This guides the welding process as follows.
以下、この発明の一実施例を図面に基づいて説
明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は溶接前のセツト状態を示し、この図に
おいて、１，２は上部電極と下部電極で、両電極
は図示しない基体に同心的に対向して配置され、
上部電極１は下部電極２に対して所定のストロー
クだけ進退でき、ネジ部材を加圧通電するように
なつている。３は下部電極２の穴２ａに嵌挿した
ガイドチユーブで、ステンレス製チユーブの内外
表面に電気絶縁性の被膜を形成したものである。 FIG. 1 shows the set state before welding, and in this figure, 1 and 2 are an upper electrode and a lower electrode, and both electrodes are arranged concentrically facing a base (not shown).
The upper electrode 1 can move forward and backward by a predetermined stroke with respect to the lower electrode 2, and the screw member is pressurized and energized. Reference numeral 3 denotes a guide tube inserted into the hole 2a of the lower electrode 2, which is made of stainless steel and has an electrically insulating coating formed on its inner and outer surfaces.
この下部電極２上に薄板ワーク４を、そのワー
クに予め形成した穴４ａがガイドチユーブ３の穴
３ａに一致するように配置し、その後にワーク４
の穴４ａに十字溝６を有する皿ネジ５を挿入し
て、皿ネジ５の頭部５ａのテーパ面５ｂを上記穴
４ａのエツジに線接触させ、かつネジ部５ｃをガ
イドチユーブ３の穴３ａに位置させている。な
お、ガイドチユーブ３の内径はワーク４に溶接す
べき皿ネジ５のネジ部５ｃの径より若干大きくな
るように製作されている。 A thin plate workpiece 4 is placed on this lower electrode 2 so that the hole 4a previously formed in the workpiece matches the hole 3a of the guide tube 3, and then the workpiece 4
A countersunk screw 5 having a cross groove 6 is inserted into the hole 4a, and the tapered surface 5b of the head 5a of the countersunk screw 5 is brought into line contact with the edge of the hole 4a, and the threaded portion 5c is inserted into the hole 3a of the guide tube 3. It is located in The inner diameter of the guide tube 3 is made to be slightly larger than the diameter of the threaded portion 5c of the countersunk screw 5 to be welded to the workpiece 4.
このようにセツトした状態で溶接を行なう。ま
ず、上部電極１を加圧動作させ、その動作とラツ
プして両電極１，２間に通電させる。この加圧通
電時に、皿ネジ５はその十字溝６で頭部５ａがほ
ぼ均一にぬすまれているため、頭部５ａ全体が加
熱軟化してワーク４の表面上につぶされるととも
にワーク４の欠４ａとのリング状の線接触部分が
局部的に溶融してワーク４と確実に溶着するので
ある（第２図参照）。この時、皿ネジ５のネジ部
５ｃはガイドチユーブ３により傾きを規制されて
いるからワーク４に対して正確に立設される。 Welding is performed with the parts set in this manner. First, the upper electrode 1 is pressurized, and current is applied between the electrodes 1 and 2 in parallel with this operation. During this pressurized energization, the head 5a of the countersunk screw 5 is almost uniformly removed by its cross groove 6, so the entire head 5a is heated and softened and crushed onto the surface of the workpiece 4, and the workpiece 4 is chipped. The ring-shaped line contact portion with 4a is locally melted and reliably welded to the workpiece 4 (see Fig. 2). At this time, since the inclination of the threaded portion 5c of the countersunk screw 5 is regulated by the guide tube 3, it is accurately set upright relative to the workpiece 4.
なお、第２図において６′は十字溝６が軟化し
て加圧されることにより残つたくぼみである。 In FIG. 2, reference numeral 6' indicates a depression left when the cross groove 6 is softened and pressurized.
以上の説明から明らかなように、この発明によ
れば、十字溝を有する皿ネジを用いることにより
ワークの穴に確実に全周を溶着させることができ
後工程でシーラーを塗る必要がなく、しかも、ガ
イドチユーブによりネジ部のワークに対する傾き
を防止して部品の取付けに支障を来たすこともな
くなり、安価にプロジヨクシヨン溶接を行なうこ
とができるものである。 As is clear from the above description, according to the present invention, by using a countersunk screw having a cross groove, the entire circumference can be reliably welded to the hole of the workpiece, and there is no need to apply sealer in the subsequent process. The guide tube prevents the threaded portion from tilting with respect to the workpiece, thereby eliminating any trouble in attaching parts, and allowing projection welding to be performed at low cost.
なお、上記実施例ではネジ部材として皿ネジを
用いたが、十字溝付きの丸皿ネジでも適用し得る
ものである。また、ガイドチユーブにおいても表
面に電気絶縁処理を施すものに限らず、それ自体
を電気絶縁材でつくつたものであつても良い。 In the above embodiment, a countersunk screw was used as the screw member, but a round countersunk screw with a cross groove may also be used. Furthermore, the guide tube is not limited to one whose surface is electrically insulated, and may itself be made of an electrically insulating material.
図面はこの発明の一実施例を示すもので、第１
図は溶接前のセツト状態を示す要部断面図、第２
図は溶接時の状態を示す要部断面図である。
１……上部電極、２……下部電極（２ａ……
穴）、３……ガイドチユーブ（３ａ……穴）、４…
…ワーク（４ａ……穴）、５……皿ネジ（５ａ…
…頭部、５ｃ……ネジ部）、６……十字溝。
The drawings show one embodiment of the invention.
The figure is a sectional view of the main part showing the set state before welding,
The figure is a sectional view of a main part showing a state during welding. 1... Upper electrode, 2... Lower electrode (2a...
hole), 3...guide tube (3a...hole), 4...
...Workpiece (4a...hole), 5...Countersunk screw (5a...
...Head, 5c...Threaded part), 6...Cross groove.
Claims (1)
この皿ネジのネジ部の径より若干大きい内径を有
する電気絶縁性のガイドチユーブを下部電極の穴
に嵌挿し、この下部電極に対してワークを装着
し、ワークに予め形成した穴を上記ガイドチユー
ブの穴と一致するようにワークを配置し、皿ネジ
をワークの穴に挿入した後、皿ネジの頭部を上部
電極で加圧通電して皿ネジをワークに溶接するよ
うにしたことを特徴とする雄ネジのプロジエクシ
ヨン溶接法。1 Use a countersunk screw with a cross groove as the screw member,
An electrically insulating guide tube having an inner diameter slightly larger than the diameter of the threaded portion of this countersunk screw is inserted into the hole of the lower electrode, a workpiece is attached to this lower electrode, and the guide tube is inserted into the pre-formed hole in the workpiece. The workpiece is placed so as to match the hole in the workpiece, and after inserting the countersunk screw into the hole in the workpiece, the head of the countersunk screw is pressurized and energized using the upper electrode to weld the countersunk screw to the workpiece. A projection welding method for male threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2803879A JPS55120492A (en) | 1979-03-09 | 1979-03-09 | Projection welding method of male screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2803879A JPS55120492A (en) | 1979-03-09 | 1979-03-09 | Projection welding method of male screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55120492A JPS55120492A (en) | 1980-09-16 |
| JPS6336877B2 true JPS6336877B2 (en) | 1988-07-21 |
Family
ID=12237560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2803879A Granted JPS55120492A (en) | 1979-03-09 | 1979-03-09 | Projection welding method of male screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55120492A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8459657B2 (en) | 2002-04-04 | 2013-06-11 | Japan Metal Gasket Co., Ltd. | Metallic gasket |
-
1979
- 1979-03-09 JP JP2803879A patent/JPS55120492A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8459657B2 (en) | 2002-04-04 | 2013-06-11 | Japan Metal Gasket Co., Ltd. | Metallic gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55120492A (en) | 1980-09-16 |
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