CN102917832B - The welding method of coated steel plates - Google Patents
The welding method of coated steel plates Download PDFInfo
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- CN102917832B CN102917832B CN201180024529.1A CN201180024529A CN102917832B CN 102917832 B CN102917832 B CN 102917832B CN 201180024529 A CN201180024529 A CN 201180024529A CN 102917832 B CN102917832 B CN 102917832B
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- insulating coating
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- metallic object
- stamping die
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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
- B23K11/14—Projection 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
- B23K11/10—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
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
- B23K11/163—Welding of coated materials
- B23K11/166—Welding of coated materials of galvanized or tinned materials
-
- 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
- B23K2101/18—Sheet panels
-
- 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
- B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Resistance Welding (AREA)
Abstract
For the metallic plate that one side is covered by insulating coating, use punching machine and the stamping die paired with this punching machine that front end geometry is smooth, never punching press is carried out to metallic object in the side of insulating coating, the metallic object of punching hole inner surface bottom is made to expose in insulating coating forming surface side thus, make this exposed division contact with the metallic object that will engage and be energized, carry out electric resistance welding.
Description
Technical field
The present invention relates to and the face covered by insulating coating of the metallic plate that one side is covered by insulating coating is energized and the method utilizing resistance welding method to engage with the metallic object be in contact with it.
Background technology
In metal structure, in order to improve corrosion resistance, improve outward appearance etc. and the technology arranging the insulating coatings such as coat film is employed in all fields in every way.
As the method arranging insulating coating, have direct metallic plate to make structure, and in subsequent handling the situation of superinsulation overlay film, also have and use the metallic plate covered by insulating coating to build the situation of structure.Make structure at direct metallic plate and in subsequent handling when superinsulation overlay film, adopt electric resistance welding as the joint method required for its assembling more.
But the cost of the subsequent handling of superinsulation overlay film is compared with the situation of assembling the metallic plate being attached with insulating coating in advance, and its price improves.Therefore, it is desirable to use the metallic plate being attached with insulating coating in advance to carry out assembled structural body.As joint method in this case, can not be energized owing to there is insulating coating and electric resistance welding can not be carried out, adopt so the joint method utilizing rivet, screw-nut or screw more.But the joint method that have employed appurtenances can increase the weight of the structure after joint, and also there is cost because of appurtenances part, the price of structure is also correspondingly gone up.Therefore, even be attached with the metallic object of insulating coating, the method engaged also to be considered.
Such as, following method is proposed in patent document 1, that is: when the face side of a side of the metallic object that will engage exists insulating coating, utilize, in the side of overlay film that has of two metallic objects that will engage, bossed electrode and paired electrode are set from up and down to two metallic objects pressurizations, thus wear out overlay film and metallic object be energized and utilize electric resistance welding to engage.
In addition, following method is proposed in patent document 2, that is: when the face side of the side at the metallic object that will engage exists insulating coating, utilize and the perforate on overlay film of bossed metal die is set in the side of overlay film that has of two metallic objects that will engage, then use pair of electrodes from pressurizeing to two metallic objects up and down, thus metallic object is energized and utilizes electric resistance welding to engage.
In addition, following method is proposed in patent document 3, that is: when there is insulating coating on the composition surface of a side of the metallic object that will engage, perforate on the metallic object having overlay film, another metallic object not having overlay film arranges pyramidal projection, under the state overlapping with the mode that the position of exposing metallic object in hole contacts with projection, utilize pair of electrodes from pressurizeing to two metallic objects up and down, thus metallic object is energized and utilizes electric resistance welding to engage.
In addition, following method is proposed in patent document 4, that is: when there is insulating coating on the composition surface of a side of the metallic object that will engage, with metal die perforate on the metallic object having overlay film of tip, under the state that the fore-end having worn out overlay film making the hole of metallic object contacts with another metallic object that can be energized, by pair of electrodes from pressurizeing to two metallic objects up and down, thus metallic object is energized and utilizes electric resistance welding to engage.
［ at first technical literature ］
［ patent document ］
Patent document 1: Japanese Unexamined Patent Publication 2000-263248 publication
Patent document 2: Japanese Unexamined Patent Publication 7-9161 publication
Patent document 3: Japanese Unexamined Patent Publication 5-154667 publication
Patent document 4: Japanese Unexamined Patent Publication 2007-125602 publication
Summary of the invention
(inventing the problem that will solve)
But in the method that patent document 1 proposes, the electrode wearing out insulating coating side must be provided with the electrode that front end is the projection of the sharp shape of the degree can wearing out overlay film, and electrode must be point or fine rule foremost.
Therefore, the welding current sharply increased that the situation of electric capacity energy storage type electric resistance welding is such cannot be flow through, and be only limitted to the electric resistance welding of the welding current utilizing minimum capacity.And, due to when electric resistance welding to applying necessary MIN plus-pressure between two welding electrodes, so make the leading section of electrode be easy to damage or distortion because of welding current and the plus-pressure that applies between welding electrode, directly cannot wear out overlay film, therefore, frequently must change electrode, be difficult to adopt such method for resistance welding in the weld job of reality.In addition, when metallic object is thin, metallic object can be run through because of plus-pressure in electrode front end, and electric current is directly flow through not to be had the metallic object of overlay film and can not weld, and therefore, must carry out high-precision plus-pressure control.In addition, even when there is overlay film on the composition surface of metallic object, also can directly flow through electric current due to electrode front end through metallic object in the metallic object not having overlay film, therefore can not weld.
In addition, in the method that patent document 2 proposes, utilize metal die perforate on the overlay film on the surface of the metallic object that will weld, with electrode from pressurizeing up and down and welding its energising, but when the flexibility of the thick situation of overlay film or overlay film is high, even if perforate can not obtain the area that welding electrode contacts with the metallic object inside overlay film, be difficult to carry out the electric resistance welding based on energising.And, identical with patent document 1, the face of the joint of metallic object exists overlay film, can not overlay film be worn out and cannot weld.
In addition, in the method that patent document 3 proposes, utilize metal die perforate on the metallic object that there is overlay film side, what will engage at another arranges projection without on the metallic object of overlay film, projection is made also to be energized to engage with the location contacts exposing metallic object in hole, but this method must implement processing to the both sides of two metallic objects that will engage, and makes cost improve because of the time of processing and the relation of required activity duration thereof.In addition, when there is multiple junction, the position of corresponding hole and projection must be made to aim at completely, therefore require high-precision processing.
Moreover, in the method that patent document 4 proposes, with instrument perforate on the metallic object of side that there is overlay film of tip, make to expose the position of metallic object and the location contacts be energized of another metallic object to carry out electric resistance welding, substantially solve the problem of above-mentioned patent document 1,2,3.
But in the situations such as the thickness of slab of the metallic object of perforate is thick, instrument must be made to rotate, and this just needs the structure of structure and the rotary actuation driven up and down, makes cost of equipment uprise.In addition, as everyone knows, bond strength and bonding area proportional, and in order to increase bond strength, the hole just must opened with the instrument of tip expands, and increases the area at the position be energized contacting another metallic object that will engage.
But, if the hole of opening with the instrument of tip is extended to a certain degree, then as shown in Fig. 1 (a), can causing hole split, so not only can not enlarge active surface, and the fore-end in the hole that electric current concentrations comes to a point in splitting during energising, can spark be produced and be difficult to engage.In addition, in order to enlarge active surface, the height of the projection on the instrument of tip be made to uprise.When engaging high projection, owing to remaining the motlten metal of the amount of the height being equivalent to projection between two metallic objects engaged, so there will be gap.If increase electrode plus-pressure when engaging, then motlten metal can be extruded when engaging and can carry out gapless joint, if but electrode plus-pressure is high, then contact area can become excessive voltage also necessary height, and insulating coating can sustain damage because high-tension heat input.
The present invention proposes for addressing these problems, its object is to provide a kind of can to the face covered by insulating coating of the metallic plate that one side is covered by insulating coating and the face be in contact with it energising and the method utilizing electric resistance welding to engage the two.
(measure of dealing with problems)
In the welding method of coated steel plates of the present invention, in order to reach above-mentioned purpose, on the metallic plate that one side is covered by insulating coating, punching press is carried out to metallic object in the side of the punching machine smooth with front end geometry and stamping die paired with it never insulating coating, the metallic object of punching hole inner surface bottom is made to expose in insulating coating forming surface side thus, and make this exposed division contact with the metallic object that will engage and be energized, and electric resistance welding is utilized to combine.
In order to make the metallic object of punching hole inner surface bottom expose in insulating coating forming surface side, the shape of the punching machine and stamping die that carry out punching press is preferably punching press cross section for circular.
In addition, as used punching machine, be preferably front end smooth and have and be equivalent to the cylindrical portion that this tabular surface vertically extends and the cone portion continued with this cylindrical portion, or front end smooth and have the cylindrical portion that vertically extends with this tabular surface and with its continuous print cone portion, also have and this cone portion continuous print large diameter cylinder portion.
When defining the amount of leaving a blank shown in such as following formula (1), preferably the amount of leaving a blank between above-mentioned punching machine when metal tape being carried out to punching press and above-mentioned stamping die being set to 60 ~ 320%, being more preferably and being set to 60 ~ 100%.
The amount of leaving a blank (%)={ (Dd-Dp)/2 }/t × 100 ... (1)
Wherein, Dd: the diameter (mm) of stamping die, Dp: the diameter (mm) of punching machine, t: the thickness of slab (mm) of metallic plate.
(invention effect)
According to the present invention, be energized between the face covered by insulating coating of the metallic plate that can cover at insulating coatings such as the coated films of one side and the face be in contact with it, and only adopt resistance welding method to engage the two, thus easily can build metal structure.And, can guarantee that the contact area for being energized is large, and stably can carry out follow-up electric resistance welding.
Therefore, it is possible to it is superior to be provided in the aspect such as corrosion resistance, outward appearance with low cost, and the metal structure of the high high-quality of bond strength.
Accompanying drawing explanation
Fig. 1 is the figure of the formation method of the thrust illustrated based on punching press, and (a) is existing method, and (b) is method of the present invention.
Fig. 2 is the figure of the relation of punching machine diameter and the stamping die diameter illustrating that thrust is formed.
Fig. 3 illustrates the figure increasing the annular metal exposed from insulating coating and expose the method for area.
Fig. 4 is the concept map that the thrust welding adopted in an embodiment is described.
Detailed description of the invention
In order to improve corrosion resistance, outward appearance etc., if the metallic object being provided with the insulating coatings such as coat film can be carried out electric resistance welding under the state being provided with insulating coating, then can be provided in the excellent metallic object works in the aspect such as corrosion resistance, outward appearance with low cost.
Therefore, the present inventor etc. have carried out various research to for being energized to the face covered by insulating coating of the metallic plate that one side is covered by insulating coating and the face be in contact with it and fetching with electric resistance welding the measure the two engaged repeatedly.
Engaging to fetch with electric resistance welding the face that covered by insulating coating, insulating coating must be made extremely thin or worn out and be energized.Due in order to make insulating coating extremely thin, also need metallic plate thinning, so the intensity of the metal plate structure body after joint can be reduced significantly.
As the method for wearing out insulating coating, as shown in above-mentioned patent document 4, have and instrument sharp-pointed for front end is pressed into also perforate in the metallic object being formed with overlay film, expose the measure of metallic object.
But, when adopting this measure to open the hole of the size to a certain degree, as shown in Fig. 1 (a), causing hole can split and metallic object is exposed with the shape that front end is sharp-pointed, be energized time split and the fore-end in sharp-pointed hole power on flow through in concentrate, can spark be produced and be difficult to engage.
If use the instrument that front end is sharp-pointed, problem described above can be produced, therefore, carried out the research to following method: use front end smooth and be cylindric punching machine and stamping die, never punching press is carried out and perforate to metallic plate in the side of insulating coating, to remove insulating coating.
But, even use front end smooth and for the punching machine of cylindrical shape and stamping die and merely punching press remove insulating coating, also cannot be able to be energized owing to remaining insulating coating between the contact surface that contacts with another metallic plate that can be energized that will engage.In common stamping procedure, because the amount of leaving a blank between punching machine and stamping die is less, so so-called " turned-down edge ", " burr " etc. are less, cause remaining insulating coating in the front end of through hole.
Therefore, relative to the punching machine of stamped metal mould, diameter sizable stamping die metal die compared with the diameter of punching machine can be used, under the condition that the shape of so-called " turned-down edge ", " burr " etc. becomes large, carry out punching press.
By carrying out punching under these conditions, as shown in Fig. 1 (b), the shape of so-called " turned-down edge ", " burr " etc. becomes large, and metallic object exposes for ring-type in the front end of through hole.If metallic object exposes for ring-type, then become the contact of wire with the contact of the metal section of the metal parts of the other side, compared with existing point-like contacts, the energising area that contact area is large can be guaranteed, can stable electric resistance welding be carried out.
In addition, the diameter of stamping die is preferably relative to the relation of the diameter of used punching machine, and the shape being formed on the through hole after punching press, so-called " turned-down edge ", " burr " etc. is the bigger the better.That is, preferably the amount of leaving a blank is arranged larger.If " burr " are little, then the metallic object of the ring-type exposed can not be exposed to the outside of insulating coating, and the metallic object contact each other of metallic object and the other side is insufficient.But if the amount of leaving a blank is excessive, then forming the scope of " turned-down edge ", " burr " etc. by punching press can be excessive and metallic object can not be made fully to expose.
In addition, when welding, the distortion such as " turned-down edge ", " burr " can be caused in the pressure that adds of electrode, the part be energized exposed by punching press can not with the part contact be energized of the metallic object of the pairing that will engage.In addition, the metallic plate of punching press is not separated with the metallic plate be stamped but left behind, and before carrying out the energising for engaging, operation or mechanically actuated etc. must remove by hand, can increase time and make cost increase like this.
But as everyone knows, bond strength and the bonding area of electric resistance welding are proportional.In the holed situation of metal pattern being tip with front end, in order to expanded hole, must carry out based on the reaming processing of cone or based on the reaming processing of rushing edge processing, but in the present invention, if the size of the punching machine of stamped sheet metal and stamping die increased, then bonding area can be increased.
In addition, the part that the projection front end of the metallic plate of punching press can be energized expose engage at most after the intensity of metallic plate high and stable.If arrange wider by the line width of the metallic object ring being exposed to insulating coating in through hole front end, the part that can be energized just can be made to expose more.
Discuss in the record of the embodiment of detailed content below, and only from the viewpoint of weldability, the amount of leaving a blank is preferably 60 ~ 320%.In order to make the metallic plate washed out be separated from the metallic plate be stamped, need to make the above-mentioned amount of leaving a blank be 60 ~ 100%.
In addition, as shown in Figure 2, the diameter setting Dp as stamping die (mm), Dp be the diameter (mm) of punching machine, t be thickness of slab (mm) of metallic plate time, the amount of leaving a blank is defined as following (1) formula.
The amount of leaving a blank (%)={ (Dd-Dp)/2 }/t × 100 ... (1)
The method exposing many as making the part that can be energized, effectively: have the position vertical from front end, is used in the end face bends of punching machine by punching hole being provided with cone above this position, makes the part that can be energized contact many with the metallic plate that will engage.
Namely, as shown in Figure 3, use front end smooth and there is the cylindrical portion that vertically extends with this tabular surface and the punching machine with this cylindrical portion continuous print cone portion, the part that can be energized is made to expose more (Fig. 3-a) " turned-down edge " bending implementing the part of perforate processing by cone portion, or, use and there is the punching machine with above-mentioned cone portion continuous print large diameter cylinder portion, smooth out with the fingers " turned-down edge " limit with limit, large diameter cylinder portion to carry out rushing edge processing (Fig. 3-b), thereby, it is possible to make the part that can be energized contact many with the metallic plate that will engage.
In order to expand contact area during electric resistance welding, as shown in Fig. 3-b to rush edge processing be effective, if but by rushing edge, to make to smooth out with the fingers quantitative change large, then the thickness of slab of jut reduces, and energising area can reduce.Therefore, bonding area minimizing, bond strength reduce.
Discuss in the embodiment of detailed content below, but using the punching machine with small diameter cylinder portion and large diameter cylinder portion, and when carrying out rushing edge processing with large diameter cylinder portion, the amount of leaving a blank in large diameter cylinder portion is preferably less than 0.9 relative to the ratio of the amount of leaving a blank in small diameter cylinder portion.
But if above-mentioned ratio is too small, metal exposed division can reduce, so its lower limit is preferably about 0.5.
Then, the preferred embodiment of electric resistance welding is described.
Preferably, adopt weld interval in electric resistance welding short, and the capacitive projection welding method that time of being influenced by heat of insulating coating is short.If electrifying method is that an electrode is carried out to punching press and pressurizes to thrust from top, paired electrode can be energized from the direction identical with another electrode to the indirect mode that another steel plate that will engage pressurizes, then can carry out the joint do not damaged insulating coating.
As described above, if on the metallic plate that one side is covered by insulating coating, punching press is carried out to metallic object in the side of the punching machine smooth with front end geometry and the stamping die paired with it never insulating coating, thus, the metallic object of punching hole inner surface bottom exposed in insulating coating forming surface side and this exposed division can be made to contact with the metallic object that will engage and can be energized, then can easily utilize resistance welding method to combine.
Embodiment
embodiment 1:
As the material for projection welding, use the steel plate being only coated with the organic overlay film as insulating coating at the one side of the hot-dip galvanized steel sheet of long 70mm, wide 40mm, thickness of slab 0.8mm.
Due to the joint on the surface and the not surface of this overlay film of carrying out existing this overlay film, so be positioned at the junction of the coated steel plates of the side on composition surface at overlay film, use various change the amount of leaving a blank punching machine and stamping die never punching press is carried out to metallic object and thrust is set in overlay film side.
Represent the diameter (Dp) of punching machine, the diameter (Dd) of stamping die and the amount of leaving a blank that use in Table 1.In addition, the front end geometry of punching machine is smooth and diameter is as shown in table 1.
［ table 1 ］
Table 1: the punching machine of use, stamping die and the amount of leaving a blank (embodiment 1)
As shown in Figure 4, by the thrust of the coated steel plates after punching press with overlapping with the mode not having the face be energized of overlay film to contact of the coated steel plates that will engage, and engage with condenser type projection welding.Electrifying method implements (indirect type) method as follows: an electrode is positioned at the top of thrust, paired electrode the side identical with another electrode be not provided with thrust the steel plate that will engage there is no overlay film and the face that can be energized contacts.In addition, electrode plus-pressure is 0.4kN, voltage is 120V.
Then, shear strength is measured to obtained conjugant.Represent its result in table 2.
［ table 2 ］
Table 2: punching press situation and maximum shear load (embodiment 1)
In test No.1, create spark and cannot engage.This is because the amount of leaving a blank between punching machine and stamping die is little, so " burr " are little, causes the front end of the through hole after punching press to remain insulating coating.In addition, also cannot engage in test No.8.The scope that this is wide due to the amount of leaving a blank and form " burr " broadens, and the pressure that adds of the electrode when welding causes distortion, fully cannot expose metallic object.
In other test No.2 ~ 7, can engage fully.In addition, in test No.4 ~ 7, owing to remaining punched metal sheet, so removing before pressurization engages.
In addition, in test No.2 ~ 7, can not there is situation about peeling off in the coat film at position upon engagement, obtain good outward appearance.
According to the above results, be judged as if the amount of leaving a blank 60 ~ 320% scope, then the good appearance that can obtain sufficient bond strength and not have coat film to peel off.
embodiment 2:
In above-mentioned example, if leave a blank quantitative change greatly, punched metal sheet can be remained.
Therefore, set the tiny amount of leaving a blank, observe the residual situation of punched metal sheet.
As punching machine and stamping die, use size as shown in table 3, similarly to Example 1 punching press has been carried out to metallic plate.
Represent the residual situation of punched metal sheet in table 4.
According to the above results, be judged as if the amount of leaving a blank is less than 100%, then can not remaining punched metal sheet after punching press, before pressurization engages, do not remove punched metal sheet also can carry out projection welding.
Contrast with the result of embodiment 1, be judged as if the amount of leaving a blank is 60 ~ 100%, just there is no need to remove punched metal sheet, projection welding can be carried out easily.
［ table 3 ］
Table 3: the punching machine of use, stamping die and the amount of leaving a blank (embodiment 2)
［ table 4 ］
Table 4: the Restzustand (embodiment 2) of punched metal sheet
| No. | Punching press situation | Remarks |
| 11 | Be separated | Be separated for 10 times in 10 times |
| 12 | Be separated | Be separated for 10 times in 10 times |
| 13 | Be separated | Be separated for 10 times in 10 times |
| 14 | Be separated | Be separated for 10 times in 10 times |
| 15 | A part is residual | Be separated for 8 times in 10 times |
| 16 | All residual | Be separated for 0 time in 10 times |
| 17 | All residual | Be separated for 0 time in 10 times |
| 18 | All residual | Be separated for 0 time in 10 times |
embodiment 3:
In above-mentioned record, in order to expand contact area during electric resistance welding, describe as shown in Fig. 3-b rush edge processing be effective situation.
Therefore, attempt as shown in Fig. 3-b, use and there is the punching machine in small diameter cylinder portion and large diameter cylinder portion, and be studied with the impact that large diameter cylinder portion carries out rushing when edge is processed, the amount of leaving a blank in small diameter cylinder portion and the amount of leaving a blank in large diameter cylinder portion.
As punching machine and stamping die, use size as shown in Table 5,6, and similarly to Example 1 punching press has been carried out to metallic plate.
Similarly to Example 1, various change is carried out to electrode plus-pressure and voltage as shown in table 7ly, and engage with projection welding.
About coat film state, all there is not stripping situation in the coat film at the position after engaging under all experimental conditions, obtain good appearance.
Then, shear strength is measured to obtained conjugant.Its result is represented in table 7 in the lump.
According to the result of table 7, the validity of rushing edge processing can be understood.
［ table 5 ］
Table 5: the punching machine of use, stamping die (embodiment 3)
［ table 6 ］
Table 6: the punching machine of use, the amount of leaving a blank (embodiment 3) of stamping die
［ table 7 ］
Table 7: punching press situation and maximum shear load (embodiment 3)
Claims (5)
1. a welding method for coated steel plates, is characterized in that,
Use punching machine and the stamping die paired with this punching machine that front end geometry is smooth, for the metallic plate that one side is covered by insulating coating, never punching press is carried out to metallic plate in the side of insulating coating, the metallic object of punching hole inner surface bottom is made to expose in insulating coating forming surface side thus, this exposed division is made to contact with the metallic object that will engage and be energized, and combined by resistance projection-welding welding
When such as defining the amount of leaving a blank shown in following formula (1), be 60 ~ 320% to the amount of leaving a blank of above-mentioned punching machine during stamped metal sheets and above-mentioned stamping die,
The amount of leaving a blank (%)={ (Dd-Dp)/2}/t × 100 ... (1),
Wherein, Dd: the diameter (mm) of stamping die, Dp: the diameter (mm) of punching machine, t: the thickness (mm) of metallic plate.
2. a welding method for coated steel plates, is characterized in that,
Use punching machine and the stamping die paired with this punching machine that front end geometry is smooth, for the metallic plate that one side is covered by insulating coating, never punching press is carried out to metallic plate in the side of insulating coating, the metallic object of punching hole inner surface bottom is made to expose in insulating coating forming surface side thus, this exposed division is made to contact with the metallic object that will engage and be energized, and combined by resistance projection-welding welding
When such as defining the amount of leaving a blank shown in following formula (1), be 60 ~ 100% to the amount of leaving a blank of above-mentioned punching machine during stamped metal sheets and above-mentioned stamping die,
The amount of leaving a blank (%)={ (Dd-Dp)/2}/t × 100 ... (1),
Wherein, Dd: the diameter (mm) of stamping die, Dp: the diameter (mm) of punching machine, t: the thickness (mm) of metallic plate.
3. the welding method of coated steel plates according to claim 1 and 2, is characterized in that,
In order to make the metallic object of punching hole inner surface bottom expose in insulating coating forming surface side, the punching machine of punching press and the punching press cross sectional shape of stamping die are circular.
4. the welding method of coated steel plates according to claim 1 and 2, is characterized in that,
The punching machine used for front end smooth and have the cylindrical portion that vertically extends with this tabular surface and with this cylindrical portion continuous print cone portion.
5. the welding method of coated steel plates according to claim 1 and 2, is characterized in that,
The punching machine used for front end smooth and have the cylindrical portion that vertically extends with this tabular surface and with this cylindrical portion continuous print cone portion, also have and this cone portion continuous print large diameter cylinder portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010113021 | 2010-05-17 | ||
| JP2010-113021 | 2010-05-17 | ||
| PCT/JP2011/060912 WO2011145506A1 (en) | 2010-05-17 | 2011-05-12 | Method for welding coated steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102917832A CN102917832A (en) | 2013-02-06 |
| CN102917832B true CN102917832B (en) | 2016-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180024529.1A Expired - Fee Related CN102917832B (en) | 2010-05-17 | 2011-05-12 | The welding method of coated steel plates |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5804765B2 (en) |
| CN (1) | CN102917832B (en) |
| AU (1) | AU2011256544B2 (en) |
| WO (1) | WO2011145506A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPWO2015087649A1 (en) * | 2013-12-11 | 2017-03-16 | 日立オートモティブシステムズ株式会社 | Valve timing control device for internal combustion engine |
| CN107471625A (en) * | 2016-06-08 | 2017-12-15 | 谢春发 | The associated methods that carrying handle is fixed on the sheet metal component for being covered with cuticular layer |
| JP6822345B2 (en) * | 2017-08-17 | 2021-01-27 | 日本製鉄株式会社 | Projection welding method and electrodes for projection welding |
| JP6749880B2 (en) * | 2017-10-13 | 2020-09-02 | 株式会社神戸製鋼所 | Piercing element driving method, element composite, and welding member |
| JP7281205B2 (en) * | 2020-08-19 | 2023-05-25 | 加賀工業株式会社 | Chain manufacturing method |
| CN115502500A (en) * | 2022-09-13 | 2022-12-23 | 佛山华智新材料有限公司 | Aluminum product with multilayer structure and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736650A (en) * | 2005-09-01 | 2006-02-22 | 上海交通大学 | Two-level electric resistance welding method for damping clad plate oil sump |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5475448A (en) * | 1977-11-26 | 1979-06-16 | Matsushita Refrigeration | Precoated plate |
| JPS60137580A (en) * | 1983-12-26 | 1985-07-22 | Mazda Motor Corp | Method of welding nut to steel plate having insulating layer |
| JPH02280975A (en) * | 1989-04-19 | 1990-11-16 | Mitsubishi Electric Corp | Projection for resistance welding and projection welding method |
| JPH03106518A (en) * | 1989-09-20 | 1991-05-07 | Hitachi Ltd | Punching method for reinforcing member for elevater |
| JP2569866B2 (en) * | 1990-02-22 | 1997-01-08 | 三菱自動車工業株式会社 | Press equipment and processing method for burring |
| JPH04138824A (en) * | 1990-09-29 | 1992-05-13 | Yasuo Ono | Punch for burring |
| JPH0654423U (en) * | 1993-01-13 | 1994-07-26 | 日新電機株式会社 | Burring mold |
| JP2007090421A (en) * | 2005-09-30 | 2007-04-12 | Nissan Motor Co Ltd | Burring die and working method |
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2011
- 2011-05-10 JP JP2011104829A patent/JP5804765B2/en active Active
- 2011-05-12 WO PCT/JP2011/060912 patent/WO2011145506A1/en active Application Filing
- 2011-05-12 CN CN201180024529.1A patent/CN102917832B/en not_active Expired - Fee Related
- 2011-05-12 AU AU2011256544A patent/AU2011256544B2/en not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736650A (en) * | 2005-09-01 | 2006-02-22 | 上海交通大学 | Two-level electric resistance welding method for damping clad plate oil sump |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2011256544B2 (en) | 2014-11-06 |
| WO2011145506A1 (en) | 2011-11-24 |
| AU2011256544A1 (en) | 2012-12-06 |
| CN102917832A (en) | 2013-02-06 |
| JP2012000668A (en) | 2012-01-05 |
| JP5804765B2 (en) | 2015-11-04 |
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