Welding method of coated steel plate
A welding method and steel plate technology, applied in welding equipment, resistance welding equipment, manufacturing tools, etc., can solve the problems of rising structure price and increasing structure weight, and achieve the effect of high joint strength, superior appearance and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0064] As a material for projection welding, a steel sheet coated with an organic coating as an insulating coating on only one side of a hot-dip galvanized steel sheet with a length of 70 mm, a width of 40 mm, and a thickness of 0.8 mm was used.
[0065] In order to join the surface with the coating and the surface without the coating, various punches and dies with different clearances are used at the joint of the coated steel plate on the side where the coating is on the joint surface. The metal body is punched from the non-coated side to form protrusions.
[0066] Table 1 shows the diameter (Dp) of the punch used, the diameter (Dd) of the punching die, and the amount of void. In addition, the shape of the tip of the punch is flat and the diameter is shown in Table 1.
[0067] [Table 1]
[0068] Table 1: Punches, stamping dies and voids used (Example 1)
[0069]
[0070] Such as Figure 4 As shown, the protrusions of the coated steel sheets after punching were overlapp...
Embodiment 2
[0080] In the above case, if the amount of space becomes large, the punched metal piece will remain.
[0081] Therefore, a small amount of space was set, and the state of remaining punched metal pieces was observed.
[0082] Metal plates were punched in the same manner as in Example 1 using the dimensions shown in Table 3 as a punch and a punching die.
[0083] Table 4 shows the state of remaining punched metal pieces.
[0084] From the above results, it is judged that if the void amount is 100% or less, the punched metal sheet does not remain after punching, and projection welding can be performed without removing the punched metal sheet before pressure joining.
[0085] Compared with the results of Example 1, it is judged that if the amount of space is 60 to 100%, there is no need to remove the punched metal sheet, and projection welding can be performed simply.
[0086] [table 3]
[0087] Table 3: Punches, dies and voids used (Example 2)
[0088]
[0089] [Table 4]
...
Embodiment 3
[0093] In the above description, in order to enlarge the contact area during resistance welding, the following image 3 The rim processing shown in -b is effective.
[0094] Therefore, try to image 3 As shown in -b, when using a punch with a small-diameter cylindrical part and a large-diameter cylindrical part, and performing burring with the large-diameter cylindrical part, the amount of space left in the small-diameter cylindrical part and the large diameter The influence of the void amount of the cylindrical part was studied.
[0095] Using the dimensions shown in Tables 5 and 6 as a punch and a punching die, a metal plate was punched in the same manner as in Example 1.
[0096] As in Example 1, various changes were made to the electrode pressing force and voltage as shown in Table 7, and bonding was performed by projection welding.
[0097] With regard to the state of the coating film, peeling did not occur on the coating film at the joined site under all test conditio...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More