JPH01224175A - Guide pin for projection welding machine - Google Patents
Guide pin for projection welding machineInfo
- Publication number
- JPH01224175A JPH01224175A JP5185188A JP5185188A JPH01224175A JP H01224175 A JPH01224175 A JP H01224175A JP 5185188 A JP5185188 A JP 5185188A JP 5185188 A JP5185188 A JP 5185188A JP H01224175 A JPH01224175 A JP H01224175A
- Authority
- JP
- Japan
- Prior art keywords
- guide pin
- main body
- welding machine
- projection welding
- silicon nitride
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 18
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 9
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 5
- 238000010292 electrical insulation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000010304 firing Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はパネルにナンド等の小物物品を溶接するプロジ
ェクション溶接機の電極に用いられるプロジェクション
溶接機用ガイドピンに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a guide pin for a projection welding machine used for an electrode of a projection welding machine for welding small articles such as Nandos to a panel.
（従来の技術）
プロジェクション溶接機の電極内部に上下動自在に支持
されてキャップの取付孔からその先端を突出させ、ナツ
ト等の小物物品の位置決めを行うためのガイドピンには
ｗＡ縁性、耐熱性のほかに強度が要求される。従来はこ
のようなガイドピンは主としてステンレス鋼の表面に絶
縁性の被膜を形成したものであった。ところがこの種の
ガイドピンは２００００〜５ｏｏｏｏ回の使用により表
面の絶縁層が！！ＩＩＩＬ、絶縁不良を生ずるために早
目に交換しなければならない欠点があった。またアルミ
ナセラミックス製のガイドピンも広く用いられているが
、絶縁不良のおそれはない反面、機械的強度が約３０ｋ
ｇ／ｄと低いためにナンド等との接触部が摩耗したり破
損し易く、又熱膨膳係数が大きいため耐熱衝撃性が低（
割れ易くやはり耐久性の点で不満があった。(Prior art) A guide pin that is supported in the electrode of a projection welding machine so as to be able to move up and down, and whose tip protrudes from the mounting hole of the cap, and is used to position small items such as nuts, has a wA edge and heat resistance. In addition to sex, strength is required. Conventionally, such guide pins have mainly been made of stainless steel with an insulating coating formed on the surface. However, after using this type of guide pin 20,000 to 500 times, the insulating layer on the surface has deteriorated! ! IIIL, there was a drawback that it had to be replaced early due to poor insulation. Guide pins made of alumina ceramics are also widely used, but while there is no risk of insulation failure, their mechanical strength is approximately 30k.
Due to the low g/d, the contact part with Nando etc. is easily worn out or damaged, and the thermal shock resistance is low due to the large coefficient of thermal expansion (
It was easy to break and there was some dissatisfaction with its durability.
（発明が解決しようとする課題）
本発明は上記したような従来の問題点を解決して、溶接
時の高温条件下においても絶縁不良や接触部の摩耗を生
ずることがない橿めて優れた耐久性を持つプロジェクシ
ョン溶接機用ガイドピンを目的として完成されたもので
ある。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides an extremely superior method that does not cause poor insulation or wear of contact parts even under high-temperature conditions during welding. It was developed to be a durable guide pin for projection welding machines.
（課題を解決するための手段）
上記の課題を解決するためになされた第１の発明はプロ
ジェクション溶接機の電極主体の内部を出没するガイド
ピン主体をシリコンナイトライドセラミックス材料から
なるものとしたことを特徴とするものであり、また第２
の発明はプロジェクション溶接機の電極主体の内部を出
没するガイドピン主体をセラミックス材料からなるもの
とするとともに、その内部に底面に向って拡大したテー
パ状部を持つ深い凹部を形成したことを特徴とするもの
である。(Means for Solving the Problem) A first invention made to solve the above problem is that the main body of the guide pin that appears inside the main electrode of the projection welding machine is made of silicon nitride ceramic material. It is characterized by
The invention is characterized in that the main body of the guide pin that protrudes and retracts from the inside of the main electrode of a projection welding machine is made of a ceramic material, and that a deep recess with a tapered part that expands toward the bottom is formed inside the guide pin. It is something to do.
（実施例）
次に本発明を図示の実施例とともに更に詳細に説明する
。(Examples) Next, the present invention will be described in more detail with reference to illustrated examples.
第１図は第１の発明の実施例を示すもので、＋１１はガ
イドピン主体、（２）は電極主体、（３）はキャップで
あって、ガイドピン主体＋１１はその先端部（４）をキ
ャップ（３）の孔（５）から突出させることができるよ
うにスプリング（６）により弾発されている。第１の発
明においては、このガイドピン主体＋１）がシリコンナ
イトライドセラミックスにより形成されている。FIG. 1 shows an embodiment of the first invention, in which +11 is a guide pin main body, (2) is an electrode main body, (3) is a cap, and the guide pin main body +11 is the tip part (4). It is urged by a spring (6) so that it can protrude from the hole (5) of the cap (3). In the first invention, this guide pin main body +1) is formed of silicon nitride ceramics.
シリコンナイトライド（ＳｉＪ＊）は電気絶縁性に優れ
ることは勿論、アルミナセラミックスに比較して機械的
強度は約３倍と大きく、かつ破壊しん性は約１．５倍で
あり、また耐熱性も良好な特性を持つ、このような５ｉ
Ｊｎの物性は（ＳｉＮ＊）を構造ユニットとする六方晶
系の共有結合性物質であるという特有の構造に由来する
ものであり、特にアルミナセラミックスのような通常の
セラミックスに比較して引張応力に対する強度に優れる
という特徴がある。このために本発明のガイドピンは掻
めて耐久性に優れたものであって、５００００〜１００
０００回の使用に耐えることができる。これを確認する
ために次のとおりのテストを行った。Silicon nitride (SiJ*) not only has excellent electrical insulation properties, but also has mechanical strength approximately 3 times greater than alumina ceramics, fracture resistance approximately 1.5 times higher, and heat resistance. Such 5i with good characteristics
The physical properties of Jn are derived from its unique structure as a hexagonal covalent substance with (SiN*) as its structural unit. It is characterized by excellent strength. For this reason, the guide pin of the present invention can be scratched and has excellent durability.
It can withstand 1,000 uses. To confirm this, the following test was conducted.
まず大径部の直径５鶴、長さ４０ｍｍの寸法のガイドピ
ンを表面被覆ステンレス合金、アルミナセラミックス、
シリコンナイトライドセラミックスの３種類の材料によ
って各５本ずつ製作し、これらのガイドピンを用いて厚
さ１ｍｍの鉄板に内径２輪、高さ３鶴のボルトを５秒ピ
ンチで連続的にプロジェクション溶接し、１万回毎にガ
イドピンを取外して外観検査を行った。その結果は次表
に示されるとおりであり、本発明のガイドピンが掻めて
優れた耐久性を持つことが明らかである。First, a guide pin with a large diameter of 5mm and a length of 40mm was made of surface-coated stainless steel, alumina ceramics, etc.
Five guide pins were made from three types of silicon nitride ceramics, and using these guide pins, bolts with two internal diameters and three bolts in height were continuously projection welded to a 1 mm thick iron plate in a pinch for 5 seconds. Then, the guide pin was removed every 10,000 times and the appearance was inspected. The results are shown in the following table, and it is clear that the guide pin of the present invention can be scratched and has excellent durability.
第２図は第２の発明の実施例を示すもので、ガイドピン
主体＋１）をセラミックス材料からなるものとするとと
もに、底面（力に向って拡大したテーパ状部（８）を持
つ深い凹部（９）をガイドピン主体（１）の内部に形成
したものである０本実施例ではガイドピンは電極主体（
２）内にノズルａ・を介して供給される圧縮空気により
出没される構造とされているが、第１図のようにスプリ
ング（６）により出没される構造としてもさしつかえな
い。FIG. 2 shows an embodiment of the second invention, in which the guide pin main body (+1) is made of ceramic material, and the bottom surface (a deep recess with a tapered portion (8) that expands toward the force) ( 9) is formed inside the guide pin main body (1). In this embodiment, the guide pin is formed inside the electrode main body (1).
2) Although the structure is such that it is moved in and out by compressed air supplied through the nozzle a, it may also be moved in and out by a spring (6) as shown in FIG.
このような凹部（９）を形成したガイドピンは中実のも
のに比較して軽量化を図ることができ上下動の応答性が
早くなるうえ、圧縮空気により電極本体ｆｉｌから突出
させる場合には空気流がこのテーパ状部（８）を持つ凹
部（９）内に入りガイドピンをがたつかせることなく正
しく中心線上に保ったままで出没させることができるの
で、溶接されるナツト等の位置ずれを防止することがで
きる。更にこのような凹部（９）を持つガイドピンは溶
接時の熱を広い表面積から放熱することができるので、
ガイドピンの耐久性を一段と向上させることができる０
以上のような効果を確認するために次のとおりのテスト
を行った。A guide pin with such a concave portion (9) formed therein can be lighter than a solid one, and has faster response in vertical movement. The air flow enters the concave part (9) having the tapered part (8) and allows the guide pin to move in and out while keeping it on the center line without rattling it, thereby preventing misalignment of nuts etc. to be welded. It can be prevented. Furthermore, the guide pin with such a recess (9) can radiate heat during welding from a wide surface area, so
The durability of the guide pin can be further improved0
In order to confirm the above effects, the following tests were conducted.
まず大径部の直径５鶴、長さ４０ｆｉ、重さ３．０ｇの
ステンレス製ガイドピンと、同寸法の重さ１．６８のア
ルミナ製のガイドピンと、同寸法の重さ１．３ｇのシリ
コンナイトライド製のガイドピンとを用意した。これら
はいずれもその底面から内径３鶴、深さ２０ｆｉの凹部
が形成されたものであるが、凹部を持たないものも比較
のために用意した。これらの各ガイドピンをＯ，Ｉ ｎ
、０．２鶴、０．３鶴、０．５ｆｉのクリアランスを持
たせたガイドピンホルダーにセフ）し、圧縮空気による
出没を行わせて作動状況を観察したところ次表のとおり
の結果が得られた。First, a stainless steel guide pin with a large diameter of 5 mm, a length of 40 fi, and a weight of 3.0 g, an alumina guide pin with the same dimensions and a weight of 1.68, and a silicone guide pin with the same dimensions and a weight of 1.3 g. I prepared a guide pin made by Ride. All of these had a recess formed from the bottom surface with an inner diameter of 3 mm and a depth of 20 fi, but one without a recess was also prepared for comparison. Each of these guide pins is O, I n
, 0.2 Tsuru, 0.3 Tsuru, and 0.5 fi clearance) were placed in guide pin holders with clearances of 0.2, 0.3, and 0.5fi, and the operating conditions were observed by moving them in and out with compressed air, and the results shown in the table below were obtained. It was done.
このように凹部が形成されたガイドピンはクリアランス
が小さ（でもスムーズに動くが従来の平底状のものはク
リアランスが小さいとスムーズに動くことができない、
このように本発明のガイドピンはクリアランスの小さい
場合にもまっすぐに出没させることができるのでパネル
やナツト等の片当りがなく、部分的な摩耗を生ずること
がないので優れた耐久性が得られることとなる。A guide pin with a recess like this has a small clearance (but can move smoothly), but a conventional flat-bottomed one cannot move smoothly if the clearance is small.
In this way, the guide pin of the present invention can be moved straight in and out even when the clearance is small, so there is no uneven contact with panels, nuts, etc., and there is no local wear, resulting in excellent durability. That will happen.
なおこのような中空状のガイドピンはメカプレス、射出
成形、乾式ラバープレス、流し込み等の方法によって成
形されたうえ焼成して製造されるものであり、例えば乾
式ラバープレス法による場合の工程は次のとおりである
。Note that such hollow guide pins are manufactured by molding and firing using methods such as mechanical press, injection molding, dry rubber press, and pouring.For example, when using the dry rubber press method, the process is as follows. That's right.
まずスプレードライヤーで造粒したシリコンナイトライ
ド原料を直径４ｆｉ、長さ３０ｆｉの中芯金を持つ内径
１０輯、長さ６０鶴のゴム型内に投入し、１０００−／
−の圧力でプレス成形する。その後成形体を中芯金から
取外し旋盤により大径部６ｗｍ、長さ５鶴に白加工し、
窒素雰囲気中で１７００℃で焼成して中芯金により凹部
が形成されたガイドピンを得ることができる。First, the silicon nitride raw material granulated with a spray dryer was put into a rubber mold with an inner diameter of 10 mm and a length of 60 mm, which had a core metal with a diameter of 4 fi and a length of 30 fi.
- Press molding at a pressure of -. After that, the molded body was removed from the core metal and white-processed using a lathe into a large diameter part of 6wm and a length of 5cm.
By firing at 1700° C. in a nitrogen atmosphere, a guide pin having a concave portion formed by the core metal can be obtained.
またメカプレス法による場合には、例えば直径４．２ｆ
ｉ、長さ３３簡の中芯金を持った下パンチと先端部が凹
形状の上パンチを持った内径１０鶴の金型中にスプレー
ドライヤーで造粒したアルミナ原料を投入し、５００
ｋｇ ／ ｃｄの圧力でプレス成形した。成形体を中芯
金から取外し旋盤で大径部外径６．１ ｔｍ、長さ５５
鶴の大きさに白加工した後、酸化雰囲気中で１６００℃
で焼成すれば中空状のガイドピンを得ることができる。In addition, when using the mechanical press method, for example, the diameter is 4.2 f.
i. Alumina raw material granulated with a spray dryer was put into a mold with an inner diameter of 10 mm, which had a lower punch with a core metal of 33 cm in length and an upper punch with a concave tip.
Press molded at a pressure of kg/cd. Remove the molded body from the core metal and use a lathe to cut the large diameter part to an outer diameter of 6.1 tm and a length of 55 mm.
After whitening to the size of a crane, it is heated to 1600℃ in an oxidizing atmosphere.
By firing it, a hollow guide pin can be obtained.
（発明の効果）
以上に説明したとおり、第１の発明によれば溶接時の高
温条件下においても絶縁不良のおそれがなく摩耗が少な
い極めて耐久性に優れたガイドピンを得ることができる
。また第２の発明によれば耐久性に優れるのみならずナ
ツト等を正確に位置決めすることができ、軽量性、作動
応答性、経済性にも優れたガイドピンを得ることができ
る。よって本発明は従来の問題点を一掃したプロジェク
ション溶接機用ガイドビンとして、産業の発展に寄与す
るところは極めて大である。(Effects of the Invention) As described above, according to the first invention, it is possible to obtain a guide pin which is extremely durable and has no risk of insulation failure and little wear even under high temperature conditions during welding. Further, according to the second invention, it is possible to obtain a guide pin that not only has excellent durability but also allows for accurate positioning of nuts and the like, and is also excellent in lightness, operational responsiveness, and economic efficiency. Therefore, the present invention greatly contributes to the development of industry as a guide bin for a projection welding machine that eliminates the problems of the conventional guide bin.
第１図は第１の発明の実施例を示す断面図、第２図は第
２の発明の実施例を示す断面図である。
（１）ニガイドピン主体、（２）：電橋主体、（″ｎ＝
底面、（８）：テーパ状部、（９）：凹部。
特許出願人 日本碍子株式会社
代 理 人 名 嶋 明 部間
綿 貫 達 部同
山 本 文 夫第１図
第２図
手続補正書（自発）
平成１年３月２８日
昭和６３年特 許 願第５１８５１号
２、発明の名称 プロジェクション溶接機用ガイドビン
３、補正をする者
事件との関係 特許出願人
住所 愛知県名古屋市瑞穂区須田町２番５６号５、補正
の対象
明細書の発明の詳細な説明の欄
６、補正の内容FIG. 1 is a sectional view showing an embodiment of the first invention, and FIG. 2 is a sectional view showing an embodiment of the second invention. (1) Mainly the guide pin, (2) Mainly the electric bridge, (″n=
Bottom surface, (8): Tapered portion, (9): Recessed portion. Patent applicant: Nippon Insulator Co., Ltd. Representative name: Akira Shima Buma
Tatsu Watanuki
Fumi Yamamoto Procedural amendment to Figure 1 Figure 2 (voluntary) March 28, 1999 Patent Application No. 51851 2, Title of invention Guide bin for projection welding machine 3 Case made by the person making the amendment Relationship with Patent applicant address: 2-56-5, Suda-cho, Mizuho-ku, Nagoya, Aichi Prefecture, Detailed description of the invention in the specification subject to amendment, column 6, Contents of amendment
Claims (1)
出没するガイドピン主体（１）をシリコンナイトライド
セラミックス材料からなるものとしたことを特徴とする
プロジェクション溶接機用ガイドピン。 ２、プロジェクション溶接機の電極主体（２）の内部を
出没するガイドピン主体（１）をセラミックス材料から
なるものとするとともに、その内部に底面（７）に向っ
て拡大したテーパ状部（８）を持つ深い凹部（９）を形
成したことを特徴とするプロジェクション溶接機用ガイ
ドピン。[Claims] 1. A guide pin for a projection welding machine, characterized in that the guide pin main body (1) that retracts from the inside of the electrode main body (2) of the projection welding machine is made of a silicon nitride ceramic material. . 2. The guide pin main body (1) that protrudes and retracts inside the electrode main body (2) of the projection welding machine is made of a ceramic material, and there is a tapered part (8) inside the guide pin that expands toward the bottom surface (7). A guide pin for a projection welding machine, characterized in that a deep recessed portion (9) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185188A JPH01224175A (en) | 1988-03-04 | 1988-03-04 | Guide pin for projection welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185188A JPH01224175A (en) | 1988-03-04 | 1988-03-04 | Guide pin for projection welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01224175A true JPH01224175A (en) | 1989-09-07 |
| JPH0356149B2 JPH0356149B2 (en) | 1991-08-27 |
Family
ID=12898359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5185188A Granted JPH01224175A (en) | 1988-03-04 | 1988-03-04 | Guide pin for projection welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01224175A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248869A (en) * | 1992-07-23 | 1993-09-28 | Ford Motor Company | Composite insulating weld nut locating pin |
| US5259675A (en) * | 1991-02-27 | 1993-11-09 | Ngk Insulators, Ltd. | Ceramic guide pin |
| CN102294539A (en) * | 2011-08-17 | 2011-12-28 | 成都九鼎科技(集团)有限公司 | Two-piece set projection welding floating device |
-
1988
- 1988-03-04 JP JP5185188A patent/JPH01224175A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259675A (en) * | 1991-02-27 | 1993-11-09 | Ngk Insulators, Ltd. | Ceramic guide pin |
| US5248869A (en) * | 1992-07-23 | 1993-09-28 | Ford Motor Company | Composite insulating weld nut locating pin |
| CN102294539A (en) * | 2011-08-17 | 2011-12-28 | 成都九鼎科技(集团)有限公司 | Two-piece set projection welding floating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0356149B2 (en) | 1991-08-27 |
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