JP2019013979A

JP2019013979A - Electrode device for resistance welding

Info

Publication number: JP2019013979A
Application number: JP2017145894A
Authority: JP
Inventors: 蕗澤　武夫; Takeo Fukizawa; 武夫蕗澤
Original assignee: Shinkokiki Co Ltd
Current assignee: Shinkokiki Co Ltd
Priority date: 2017-07-10
Filing date: 2017-07-10
Publication date: 2019-01-31

Abstract

To provide an electrode device for resistance welding capable of removing easily a member to be welded to which a weld nut is welded, and improving weld efficiency.SOLUTION: An electrode device for resistance welding in which a guide pin 10 stored vertically movably in an electrode is lifted by supplying air, so that an upper end part is projected furthermore than the electrode, is provided with energization means 13 for energizing so that the upper end part of the guide pin 10 is drawn into the electrode, when supply of air is stopped. An elastic body is used as the energization means 13.SELECTED DRAWING: Figure 1

Description

本発明は、ウエルドナットを被溶接部材に溶接する抵抗溶接用電極装置に関するものである。 The present invention relates to an electrode device for resistance welding that welds a weld nut to a member to be welded.

従来、ウエルドナットを被溶接部材に溶接する抵抗溶接用電極装置としては、図４に示すように、電極本体５１と電極チップ５２からなる電極の内部に、ガイドピン５３を上下動可能に収納し、溶接時にエアー供給路５４から供給されるエアーにてガイドピンを上昇して、電極チップ５２からガイドピン５３の上端部を突出し、被溶接部材とウエルドナットをガイドピン５３の突出した上端部に嵌め込み、上部電極を下降してウエルドナットを溶接するとともに、エアーの供給を停止してガイドピンを下降し、ウエルドナットを溶接した被溶接部材を電極から外していた。（例えば特許文献１参照。） Conventionally, as a resistance welding electrode device for welding a weld nut to a member to be welded, a guide pin 53 is housed in an electrode composed of an electrode body 51 and an electrode tip 52 so as to be movable up and down as shown in FIG. The guide pin is raised by the air supplied from the air supply path 54 at the time of welding, the upper end portion of the guide pin 53 protrudes from the electrode tip 52, and the welded member and the weld nut are placed on the protruding upper end portion of the guide pin 53. The welded nut was welded by lowering the upper electrode and the supply of air was stopped, the guide pin was lowered, and the welded member welded with the weldnut was removed from the electrode. (For example, refer to Patent Document 1.)

特開２０００−０５２０５３号公報JP 2000-052053 A

前記のものでは、エアーの供給を停止しても、エアー供給路５４の残圧によりガイドピン５３の上端部が電極チップ５２内に収納されるまで時間が掛ため、ガイドピン５３の上端部が電極チップ５２内に完全に収納される前に、被溶接部材を電極から外しているので被溶接部材が外し難く、特に被溶接部材がコ字形に折り曲げられている場合には、ガイドピン５３の上端部が電極チップ５２内に引き込まれるまで待たなければならないことがあり溶接効率が悪くなるという問題があった。 In the above, even if the air supply is stopped, it takes time until the upper end portion of the guide pin 53 is accommodated in the electrode chip 52 due to the residual pressure in the air supply path 54. Since the member to be welded is removed from the electrode before it is completely stored in the electrode tip 52, it is difficult to remove the member to be welded. Especially when the member to be welded is bent in a U shape, the guide pin 53 There is a problem in that welding efficiency may be deteriorated in some cases because it is necessary to wait until the upper end portion is pulled into the electrode tip 52.

本発明は、前記の問題を解決し、ウエルドナットを溶接した被溶接部材の取外しが容易にでき、溶接効率を向上できる抵抗溶接用電極装置を提供することを目的になされたものである。 An object of the present invention is to provide an electrode device for resistance welding that solves the above-described problems, can easily remove a member to be welded to which a weld nut is welded, and can improve welding efficiency.

上記課題を解決するためになされた本発明の電気抵抗用電極は、電極に、上下動可能に収納されたガイドピンが、エアーが供給されることにより上昇し、上端部が電極より突出するようにした抵抗溶接用電極装置において、エアーの供給が停止されると、電極から突出しているガイドピンの上端部が電極に引き込まれるように付勢する付勢手段を設けたことを特徴とするものである。 The electrode for electrical resistance of the present invention made to solve the above problems is such that the guide pin accommodated in the electrode so as to move up and down rises when air is supplied, and the upper end protrudes from the electrode. The resistance welding electrode device according to claim 1, further comprising an urging means for urging the upper end portion of the guide pin protruding from the electrode to be pulled into the electrode when the supply of air is stopped. It is.

前記付勢手段として弾性体を用いたものであることが好ましく、これを請求項２に係る発明とする。 It is preferable that an elastic body is used as the biasing means, and this is the invention according to claim 2.

請求項１の発明では、エアーの供給が停止されると、電極から突出しているガイドピンの上端部が電極に引き込まれるように付勢する付勢手段を設けたので、ウエルドナットを溶接した被溶接部材の取外しが容易にでき、溶接効率を向上できる。 According to the first aspect of the present invention, since the biasing means for biasing the upper end portion of the guide pin protruding from the electrode is pulled into the electrode when the supply of air is stopped, the welded nut is welded. The welding member can be easily removed, and the welding efficiency can be improved.

請求項２の発明では、前記付勢手段として弾性体を用いたので構成が簡単にできる。 In the invention of claim 2, since an elastic body is used as the urging means, the configuration can be simplified.

本発明の好ましい実施の形態を示す断面図である。It is sectional drawing which shows preferable embodiment of this invention. 図１の溶接前の状態を示す断面図である。It is sectional drawing which shows the state before welding of FIG. 図２の溶接後の状態を示す断面図である。It is sectional drawing which shows the state after the welding of FIG. 従来例の断面図である。It is sectional drawing of a prior art example.

以下、本発明の好ましい実施の形態について図１乃至図３に基づいて説明すると、１は電極本体であり、電極本体１の上端部には上面開口の収納凹部２が形成されると共に、基端に設けられ、エアー管３が接続されるエアー導入口４と前記収納凹部２底面の開口部５とを連通するエアー導入路６が形成されている。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 denotes an electrode main body. The air introduction path 6 is formed so as to connect the air introduction port 4 to which the air pipe 3 is connected and the opening 5 on the bottom surface of the storage recess 2.

７は中央部に表面から裏面への貫通孔８が形成されるとともに、底面の貫通孔８の周囲に嵌合突起９が形成された電極チップであり、電極チップ７は、嵌合突起９を電極本体１の収納凹部２の上面開口部より圧入し。電極本体１に取付け固定している。尚、電極本体１と電極チップ７にて電極が構成されている。 Reference numeral 7 denotes an electrode chip in which a through hole 8 from the front surface to the back surface is formed in the central portion, and a fitting protrusion 9 is formed around the through hole 8 on the bottom surface. Press fit from the upper surface opening of the housing recess 2 of the electrode body 1. It is attached and fixed to the electrode body 1. The electrode body 1 and the electrode tip 7 constitute an electrode.

１０は下端に収納凹部２の上面開口より僅かに小さなフランジ部１１が形成され、上端に先細部１２が形成されているガイドピンであり、ガイドピン１０は電極本体１の収納凹部２に収納し、上部を電極チップ７の貫通孔８に挿通し、上下動可能に電極に収納されている。 Reference numeral 10 denotes a guide pin in which a flange portion 11 slightly smaller than the upper surface opening of the storage recess 2 is formed at the lower end and a tapered portion 12 is formed at the upper end. The guide pin 10 is stored in the storage recess 2 of the electrode body 1. The upper part is inserted into the through-hole 8 of the electrode chip 7 and accommodated in the electrode so as to be movable up and down.

１３はガイドピン１０のフランジ部１１と電極チップ７の底面との間に介装され、ガイドピン１０の上端部を電極チップ７に引き込むように付勢する付勢手段であるコイルばね等の弾性体であり、１４はガイドピンが引き込まれたとき電極本体１の収納凹部２底面に衝突したときの衝撃力を緩和する緩衝材であり、また１５は略コ字形に折り曲げられた被溶接部材であり、１６はウエルドナットである。 13 is interposed between the flange portion 11 of the guide pin 10 and the bottom surface of the electrode tip 7, and is elastic such as a coil spring that is an urging means for urging the upper end portion of the guide pin 10 to be pulled into the electrode tip 7. 14 is a cushioning material that alleviates the impact force when the guide pin is retracted and collides with the bottom of the housing recess 2 of the electrode body 1, and 15 is a member to be welded that is bent into a substantially U-shape. Yes, 16 is a weld nut.

次に、上記の実施の形態の電極による溶接方法を説明すると、図示されていないコンプレッサーなどの圧縮空気供給装置からエアー管３を介して供給されたエアーが、電極本体１のエアー導入口４からエアー導入路６を介して収納凹部２の底面開口部５から収納部２に噴出し、ガイドピン１０を押し上げて、図１に示すようにガイドピン１０の上端部が電極チップ１より突出した状態となりこの後、被溶接部材１５の上板の位置決め孔１７がガイドピン１０の上端部に嵌め込まれるとともに、ウエルドナット１６のねじ穴をガイドピン１０の上端部に嵌め込み、図２に示す電極に被溶接部材１５とウエルドナット１６をセットした状態となる。 Next, the welding method using the electrodes of the above embodiment will be described. Air supplied from a compressed air supply device such as a compressor (not shown) through the air pipe 3 is supplied from the air introduction port 4 of the electrode body 1. A state where the upper end of the guide pin 10 protrudes from the electrode chip 1 as shown in FIG. Then, the positioning hole 17 on the upper plate of the welded member 15 is fitted into the upper end portion of the guide pin 10, and the screw hole of the weld nut 16 is fitted into the upper end portion of the guide pin 10, so that the electrode shown in FIG. The welding member 15 and the weld nut 16 are set.

さらにこの後、図示されていない上部電極が下降してウエルドナット１６を被溶接部材１５に溶接すると共に電極本体１へのエアーの供給を停止する。このようにエアーの供給が停止されると、ガイドピン１０はコイルばね１３により、速やかに下降し、突出していた上端部は、図３に示すように電極チップ７に引き込まれるのでガイドピン１０の上端部が、ウエルドナット１６を溶接された被溶接部材１５を外すのに邪魔にならない。 Thereafter, the upper electrode (not shown) is lowered to weld the weld nut 16 to the member 15 to be welded, and the supply of air to the electrode body 1 is stopped. When the supply of air is stopped in this way, the guide pin 10 is quickly lowered by the coil spring 13, and the protruding upper end is drawn into the electrode chip 7 as shown in FIG. The upper end portion does not obstruct the removal of the member 15 to which the weld nut 16 is welded.

以上のように、本発明によれば、エアーの供給が停止されると、電極から突出しているガイドピン１０の上端部が電極に引き込まれるように付勢する付勢手段１３を設けたので、溶接後ガイドピン１５は付勢手段１３により、速やかに電極より突出していた上端部を電極内に引き込むので、ガイドピン１０の上端部がウエルドナット１６を溶接された被溶接部材１５を外すのに邪魔にならず、ウエルドナットを溶接した被溶接部材の取外しが容易にでき、かつ溶接効率も向上できる。 As described above, according to the present invention, when the supply of air is stopped, the biasing means 13 that biases the upper end portion of the guide pin 10 protruding from the electrode so as to be pulled into the electrode is provided. After welding, the guide pin 15 quickly pulls the upper end portion protruding from the electrode into the electrode by the biasing means 13, so that the upper end portion of the guide pin 10 removes the welded member 15 to which the weld nut 16 is welded. The member to be welded with the weld nut can be easily removed and the welding efficiency can be improved.

１電極本体
２収納凹部
３エアー管
４エアー導入口
５開口部
６エアー導入路
７電極チップ
８貫通孔
９嵌合突起
１０ガイドピン
１１フランジ部
１２先細部
１３付勢手段DESCRIPTION OF SYMBOLS 1 Electrode main body 2 Storage recessed part 3 Air pipe 4 Air introduction port 5 Opening part 6 Air introduction path 7 Electrode tip 8 Through-hole 9 Fitting protrusion 10 Guide pin 11 Flange part 12 Tip 13 Energizing means

Claims

In the electrode apparatus for resistance welding in which the guide pin housed in the electrode so as to be movable up and down is raised by supplying air, and the upper end protrudes from the electrode, when the supply of air is stopped, An electrode device for resistance welding characterized by comprising an urging means for urging so that an upper end portion of a guide pin protruding from an electrode is drawn into the electrode

2. The resistance welding electrode device according to claim 1, wherein an elastic body is used as the biasing means.