WO2017010071A1 - Resistance spot welding method - Google Patents
Resistance spot welding method Download PDFInfo
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- WO2017010071A1 WO2017010071A1 PCT/JP2016/003256 JP2016003256W WO2017010071A1 WO 2017010071 A1 WO2017010071 A1 WO 2017010071A1 JP 2016003256 W JP2016003256 W JP 2016003256W WO 2017010071 A1 WO2017010071 A1 WO 2017010071A1
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- energization
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- spot welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/241—Electric supplies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
Definitions
- the electrode-side surface vicinity A is sufficiently softened, and the electrode 4 and the steel plate 1 and the electrode 5 and the steel plate 2 can be sufficiently brought into contact with each other.
- the present invention by appropriately controlling the energization time Tp and the current value Ip of the pre-energization, the vicinity A of the electrode side surface is sufficiently softened before the nugget formation, and a sufficient pressure is applied in the main energization.
- the large nugget diameter can be stably obtained while securing, expanding the energization path, and suppressing the occurrence of scattering.
- the softened portion near the electrode side surface A can be enlarged before the nugget is formed.
Abstract
Description
[1] 鋼板を重ねた板組を抵抗スポット溶接する方法であって、
本通電と、本通電より前の予備通電と、本通電の後の後通電とを行い、前記各通電の間には通電を休止する無通電時間が設けられ、
本通電の電流値をIm[kA]、通電時間をTm[ms]とし、
予備通電の電流値をIp[kA]、通電時間をTp[ms]、
予備通電と本通電の間の無通電時間をTcp[ms]、
後通電の電流値をIr[kA]、通電時間をTr[ms]、
本通電と後通電の間の無通電時間をTcr[ms]としたとき、
以下の式(1)~(6)を満たす抵抗スポット溶接方法。 The present invention has been obtained as a result of such studies, and the gist of the present invention is as follows.
[1] A method of resistance spot welding a set of stacked steel plates,
The main energization, the preliminary energization before the main energization, and the post energization after the main energization are performed, and a non-energization time for stopping energization is provided between the energizations,
The current value of main energization is Im [kA], the energization time is Tm [ms]
The pre-energization current value is Ip [kA], the energization time is Tp [ms],
The non-energization time between pre-energization and main energization is Tcp [ms],
The current value of post energization is Ir [kA], the energization time is Tr [ms],
When the non-energization time between main energization and post-energization is Tcr [ms]
A resistance spot welding method that satisfies the following equations (1) to (6).
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
40ms ≦ Tp ≦ 100ms (3)
40ms ≦ Tr ≦ 100ms (4)
10ms ≦ Tcp ≦ 60ms (5)
80ms ≦ Tcr ≦ 300ms (6)
[2] さらに以下の式(7)および式(8)を満たす[1]に記載の抵抗スポット溶接方法。 1.05 × Im ≦ Ip ≦ 2.0 × Im (1)
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
40ms ≤ Tp ≤ 100ms (3)
40ms ≤ Tr ≤ 100ms (4)
10ms ≤ Tcp ≤ 60ms (5)
80ms ≤ Tcr ≤ 300ms (6)
[2] The resistance spot welding method according to [1], further satisfying the following expressions (7) and (8):
0.25 ≦ Rpm ≦ 0.95 (8)
ただし、Rpm = (Ip / Im) 2 × (Tp / Tm)
[3] 予備通電を2回以上行い、
各予備通電の間には通電を休止する無通電時間が設けられ、
2回目以降の予備通電を、前の回の予備通電の電流値以下の電流値で行う[1]または[2]に記載の抵抗スポット溶接方法。
[4] さらに以下の式(9)を満たす[1]乃至[3]のいずれかに記載の抵抗スポット溶接方法。 160ms ≤ Tm ≤ 500ms (7)
0.25 ≤ Rpm ≤ 0.95 (8)
However, Rpm = (Ip / Im) 2 × (Tp / Tm)
[3] Perform preliminary energization twice or more,
Between each preliminary energization, there is a non-energization time to stop energization,
The resistance spot welding method according to [1] or [2], wherein the second and subsequent preliminary energizations are performed at a current value equal to or less than the current value of the previous pre-energization.
[4] The resistance spot welding method according to any one of [1] to [3], further satisfying the following formula (9):
ただし、Rmr = (Ir / Im)2 × (Tr / Tm)
[5] 後通電を2回以上行い、
各後通電の間には通電を休止する無通電時間が設けられる[1]乃至[4]のいずれかに記載の抵抗スポット溶接方法。
[6] 板組のうち少なくとも1枚の鋼板は、引張強度780MPa以上を有する高強度鋼板である[1]乃至[5]のいずれかに記載の抵抗スポット溶接方法。 0.10 ≤ Rmr ≤ 1.50 (9)
However, Rmr = (Ir / Im) 2 × (Tr / Tm)
[5] After energization twice or more,
The resistance spot welding method according to any one of [1] to [4], wherein a non-energization time for stopping energization is provided between each subsequent energization.
[6] The resistance spot welding method according to any one of [1] to [5], wherein at least one of the steel plates is a high strength steel plate having a tensile strength of 780 MPa or more.
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
予備通電の電流値Ipが1.05 × Im未満であると、電極側表面付近Aが十分に軟化されない。また、後通電の電流値Irが1.05 × Im未満であると、電極側表面付近Aが十分に軟化されず、また、ナゲット端部のPの偏析を緩和するという後通電の効果を十分に得ることができない。予備通電の電流値Ipおよび後通電の電流値Irが2.0 × Imより大きくなると、溶融により散りが発生する。Ip、Irは、それぞれ、1.80 × Im以下が好ましく、1.60 × Im以下がより好ましい。 1.05 × Im ≦ Ip ≦ 2.0 × Im (1)
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
If the pre-energization current value Ip is less than 1.05 × Im, the electrode-side surface vicinity A is not sufficiently softened. Further, if the current value Ir for post-energization is less than 1.05 × Im, the vicinity A of the electrode side surface is not sufficiently softened, and the effect of post-energization that alleviates the segregation of P at the nugget end is sufficiently obtained. I can't. When the pre-energization current value Ip and the post-energization current value Ir are larger than 2.0 × Im, scattering occurs due to melting. Ip and Ir are each preferably 1.80 × Im or less, and more preferably 1.60 × Im or less.
40ms ≦ Tr ≦ 100ms (4)
同様に、予備通電の通電時間Tpが40ms未満であると、電極側表面付近Aが十分に軟化されない。また、後通電の通電時間Trが40ms未満であると、電極側表面付近Aが十分に軟化されず、また、ナゲット端部のPの偏析を緩和するという後通電の効果を十分に得ることができない。予備通電の通電時間Tpおよび後通電の通電時間Trが100msより大きくなると、溶融しすぎて散りが発生する。 40ms ≤ Tp ≤ 100ms (3)
40ms ≤ Tr ≤ 100ms (4)
Similarly, if the energization time Tp for the pre-energization is less than 40 ms, the electrode-side surface vicinity A is not sufficiently softened. Further, when the energization time Tr of post-energization is less than 40 ms, the vicinity A of the electrode side surface is not sufficiently softened, and the effect of post-energization that alleviates the segregation of P at the nugget end can be obtained. Can not. When the energization time Tp for the pre-energization and the energization time Tr for the post-energization become longer than 100 ms, the melting is excessive and scattering occurs.
無通電時間Tcpが10ms未満では、次の通電により発熱が過大となるため、無通電時の伝熱による軟化の効果を十分に得ることができない。無通電時間Tcpが60msより大きくなると、冷却が進んでしまい、本通電で再加熱するのに時間がかかる。 10ms ≤ Tcp ≤ 60ms (5)
When the non-energization time Tcp is less than 10 ms, heat generation becomes excessive due to the next energization, and thus the effect of softening due to heat transfer during non-energization cannot be sufficiently obtained. When the non-energization time Tcp is longer than 60 ms, the cooling proceeds, and it takes time to reheat with the main energization.
無通電時間Tcrが80ms未満では、後通電において高温となり過ぎて再溶融し、散りが発生してしまう。無通電時間Tcrが300msより大きくなると、後通電で再加熱するのに時間がかかる。 80ms ≤ Tcr ≤ 300ms (6)
When the non-energization time Tcr is less than 80 ms, it becomes too hot during subsequent energization and remelts, causing scattering. When the non-energization time Tcr is longer than 300 ms, it takes time to reheat by post-energization.
通電時間Tmが160ms以上であると、ナゲットの形成が安定し、必要なナゲット径をより得られやすくなる。Tmは、200ms以上がより好ましい。通電時間Tmが500msより大きくなると、溶接時間が長くなり、生産性が悪くなるおそれがある。 160ms ≤ Tm ≤ 500ms (7)
When the energization time Tm is 160 ms or more, the formation of the nugget is stabilized, and the necessary nugget diameter can be obtained more easily. Tm is more preferably 200 ms or more. If the energization time Tm is longer than 500 ms, the welding time becomes longer and the productivity may be deteriorated.
ただし、Rpm = (Ip / Im) 2 × (Tp / Tm) とする。 0.25 ≤ Rpm ≤ 0.95 (8)
However, Rpm = (Ip / Im) 2 × (Tp / Tm).
ただし、Rmr = (Ir / Im)2 × (Tr / Tm) とする。 0.10 ≤ Rmr ≤ 1.50 (9)
However, Rmr = (Ir / Im) 2 × (Tr / Tm).
2 上の鋼板
3 板組
4 下の電極
5 上の電極
6 ナゲット DESCRIPTION OF SYMBOLS 1
Claims (6)
- 鋼板を重ねた板組を抵抗スポット溶接する方法であって、
本通電と、本通電より前の予備通電と、本通電の後の後通電とを行い、前記各通電の間には通電を休止する無通電時間が設けられ、
本通電の電流値をIm[kA]、通電時間をTm[ms]とし、
予備通電の電流値をIp[kA]、通電時間をTp[ms]、
予備通電と本通電の間の無通電時間をTcp[ms]、
後通電の電流値をIr[kA]、通電時間をTr[ms]、
本通電と後通電の間の無通電時間をTcr[ms]としたとき、
以下の式(1)~(6)を満たす抵抗スポット溶接方法。
1.05 × Im ≦ Ip ≦ 2.0 × Im (1)
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
40ms ≦ Tp ≦ 100ms (3)
40ms ≦ Tr ≦ 100ms (4)
10ms ≦ Tcp ≦ 60ms (5)
80ms ≦ Tcr ≦ 300ms (6) A method of resistance spot welding a set of steel plates,
The main energization, the preliminary energization before the main energization, and the post energization after the main energization are performed, and a non-energization time for stopping energization is provided between the energizations,
The current value of main energization is Im [kA], the energization time is Tm [ms]
The pre-energization current value is Ip [kA], the energization time is Tp [ms],
The non-energization time between pre-energization and main energization is Tcp [ms],
The current value of post energization is Ir [kA], the energization time is Tr [ms],
When the non-energization time between main energization and post-energization is Tcr [ms]
A resistance spot welding method that satisfies the following equations (1) to (6).
1.05 × Im ≦ Ip ≦ 2.0 × Im (1)
1.05 × Im ≦ Ir ≦ 2.0 × Im (2)
40ms ≤ Tp ≤ 100ms (3)
40ms ≤ Tr ≤ 100ms (4)
10ms ≤ Tcp ≤ 60ms (5)
80ms ≤ Tcr ≤ 300ms (6) - さらに以下の式(7)および式(8)を満たす請求項1に記載の抵抗スポット溶接方法。
160ms ≦ Tm ≦ 500ms (7)
0.25 ≦ Rpm ≦ 0.95 (8)
ただし、Rpm = (Ip / Im) 2 × (Tp / Tm) Furthermore, the resistance spot welding method of Claim 1 which satisfy | fills the following formula | equation (7) and Formula (8).
160ms ≤ Tm ≤ 500ms (7)
0.25 ≤ Rpm ≤ 0.95 (8)
However, Rpm = (Ip / Im) 2 × (Tp / Tm) - 予備通電を2回以上行い、
各予備通電の間には通電を休止する無通電時間が設けられ、
2回目以降の予備通電を、前の回の予備通電の電流値以下の電流値で行う請求項1または2に記載の抵抗スポット溶接方法。 Perform preliminary energization twice or more,
Between each preliminary energization, there is a non-energization time to stop energization,
The resistance spot welding method according to claim 1 or 2, wherein the second and subsequent preliminary energizations are performed at a current value equal to or less than the current value of the previous preliminary energization. - さらに以下の式(9)を満たす請求項1乃至3のいずれかに記載の抵抗スポット溶接方法。
0.10 ≦ Rmr≦ 1.50 (9)
ただし、Rmr = (Ir / Im)2 × (Tr / Tm) Furthermore, the resistance spot welding method in any one of the Claims 1 thru | or 3 which satisfy | fill the following formula | equation (9).
0.10 ≤ Rmr ≤ 1.50 (9)
However, Rmr = (Ir / Im) 2 × (Tr / Tm) - 後通電を2回以上行い、
各後通電の間には通電を休止する無通電時間が設けられる請求項1乃至4のいずれかに記載の抵抗スポット溶接方法。 After energizing twice or more,
The resistance spot welding method according to any one of claims 1 to 4, wherein a non-energization time for stopping energization is provided between each subsequent energization. - 板組のうち少なくとも1枚の鋼板は、引張強度780MPa以上を有する高強度鋼板である請求項1乃至5のいずれかに記載の抵抗スポット溶接方法。 The resistance spot welding method according to any one of claims 1 to 5, wherein at least one of the steel plates is a high strength steel plate having a tensile strength of 780 MPa or more.
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CN111712348A (en) * | 2018-02-09 | 2020-09-25 | 杰富意钢铁株式会社 | Resistance spot welding method and method for manufacturing resistance spot welded joint |
JP7368716B2 (en) | 2019-11-07 | 2023-10-25 | 日本製鉄株式会社 | Manufacturing method of resistance spot welding joints |
WO2024029626A1 (en) * | 2022-08-04 | 2024-02-08 | 日本製鉄株式会社 | Method for manufacturing spot welded joint, and spot welded joint |
JP7473861B1 (en) | 2022-11-24 | 2024-04-24 | Jfeスチール株式会社 | Resistance Spot Welding Method |
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KR20180011319A (en) | 2018-01-31 |
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CN107848062B (en) | 2021-03-09 |
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