CN-121267455-B - Double-phase stainless steel sheet welding device and process

Abstract

The invention provides a double-phase stainless steel sheet welding device and a double-phase stainless steel sheet welding process. The double-phase stainless steel sheet welding device comprises a bottom frame, wherein a mounting plate is fixedly connected to the bottom frame, a first electric push rod is fixedly connected to the mounting plate, a set of multi-stage telescopic mechanism is arranged at the telescopic end of the first electric push rod, and the mechanism consists of a plurality of iron cylindrical pipes. Through the cylindrical pipe design that adopts multistage iron concentric nested structure and integrated electromagnetic locking and cooling cavity, this device has realized showing the promotion in function and performance, and this design carries out axial concertina movement through first electric putter drive cylinder pipe at all levels to cooperate the on-off circuit control of electro-magnet, realized adapting multiple diameter specification with single mold core fast, accurately, thereby effectively solved the operation interruption, intensity of labour and the low scheduling problem of production efficiency that the processing of each different diameter barrel just needs to change whole mold core in prior art.

Inventors

• ZHANG GUOQING
• YANG BO
• OUYANG YUGUANG
• Qiu Chunbang

Assignees

• 广州纬华节能设备有限公司

Dates

Publication Date

20260512

Application Date

20251126

Claims (9)

1. 1. The double-phase stainless steel sheet welding device is characterized by comprising a bottom frame (1), wherein a mounting plate (2) is fixedly connected to the bottom frame (1); The telescopic structure is characterized in that a first electric push rod (3) is fixedly connected to the mounting plate (2), a set of multistage telescopic mechanism is arranged at the telescopic end of the first electric push rod (3), the mechanism consists of a plurality of iron cylindrical pipes (4), the plurality of cylindrical pipes (4) are of concentric nested telescopic design, the diameters of the cylindrical pipes are sequentially reduced from the outermost layer to the innermost layer, a fixing rod (5) is fixedly connected to the mounting plate (2), a cross (6) is fixedly connected to the fixing rod (5), the cross (6) is fixedly connected with the cylindrical pipe (4) of the innermost layer, and an electromagnet (7) is fixedly connected to the inner annular surface of the cylindrical pipe (4); The stainless steel sheet welding device is characterized in that a pressing mechanism is connected to the inner wall of the mounting plate (2), the pressing mechanism comprises an electric sliding rail (21) fixedly connected with the inner wall of the mounting plate (2), a first electric sliding block (22) is connected to the electric sliding rail (21) in a sliding mode, a supporting plate (23) is fixedly connected to the first electric sliding block (22), a hydraulic cylinder (24) is fixedly connected to the supporting plate (23), a pressing plate (25) is fixedly connected to a telescopic part of the hydraulic cylinder (24), a stainless steel sheet is pressed into a cylinder shape through the pressing plate (25) under the cooperation of a cylindrical pipe (4), and a welding mechanism is connected to the mounting plate (2) and can weld the connecting position of the stainless steel sheet in the cylinder shape.
2. 2. The welding device for the duplex stainless steel sheet according to claim 1, wherein a cavity for containing cooling liquid is formed inside the cylindrical tube (4), and a liquid inlet tube (8) and a liquid outlet tube (9) are communicated with the cavity on the cylindrical tube (4).
3. 3. A duplex stainless steel sheet welding apparatus according to claim 1, wherein one side of the pressing plate (25) is provided as an arc surface (25 a).
4. 4. The welding device for the duplex stainless steel sheet according to claim 1, further comprising a moving mechanism, wherein the chassis (1) is connected with the moving mechanism, a second electric push rod (33) is fixedly connected to the moving mechanism, and a fixing plate (34) is fixedly connected to a telescopic part of the second electric push rod (33).
5. 5. The welding device for the duplex stainless steel thin plates according to claim 1, wherein a groove (4 a) is formed in the cylindrical tube (4), an exhaust tube (41) and an air inlet tube (42) are penetrated through the cylindrical tube (4), a port of the exhaust tube (41) is located at the rightmost end of the groove (4 a), an air bag (43) is fixedly connected in the groove (4 a), a fixed tube (44) is communicated with the air bag (43), and the fixed tube (44) is communicated with the air inlet tube (42).
6. 6. The welding device for the duplex stainless steel thin plates according to claim 1, wherein the welding mechanism comprises a bracket (51) fixedly connected with a mounting plate (2), a third electric sliding rail (52) is fixedly connected to the bracket (51), a third electric sliding block (53) is slidably connected to the third electric sliding rail (52), a third electric push rod (54) is fixedly connected to the third electric sliding block (53), and a welding gun (55) is fixedly connected to a telescopic part of the third electric push rod (54).
7. 7. The welding device for the duplex stainless steel thin plates according to claim 6, wherein the welding mechanism further comprises a fourth electric push rod (56) fixedly connected with a support (51), an L-shaped plate (57) is fixedly connected with a telescopic part of the fourth electric push rod (56), a protective shell (58) is fixedly connected onto the L-shaped plate (57), the protective shell (58) is made of rubber, an air outlet pipe (59) is fixedly connected to the right end of the protective shell (58), a first conveying pipe (60) and a second conveying pipe (61) are fixedly connected to the left end of the protective shell (58), a rubber strip (62) is arranged at the top of the protective shell (58), and the rubber strip (62) is made of high-temperature-resistant material.
8. 8. The welding device for the duplex stainless steel sheet according to claim 4, wherein the moving mechanism comprises a second electric sliding rail (31) fixedly connected with the underframe (1), a second electric sliding block (32) is connected to the second electric sliding rail (31) in a sliding manner, the second electric sliding block (32) is fixedly connected with a second electric push rod (33), and an electric sucking disc (35) is fixedly connected in the fixing plate (34).
9. 9. A duplex stainless steel sheet welding process, using a duplex stainless steel sheet welding apparatus as defined in claim 8, characterized by the specific steps of: S1, preparing and positioning, namely placing a duplex stainless steel thin plate on a pressing plate (25) through an external transfer device, controlling a first electric sliding block (22) to move upwards along a first electric sliding rail (21) to enable the thin plate to be in contact with the outer wall of an outermost cylindrical tube (4), and then controlling a second electric push rod (34) to drive a fixing plate (34) to move upwards, and adsorbing and propping the thin plate on the surface of the cylindrical tube (4) through the fixing plate (34); S2, rolling and forming, namely starting a hydraulic cylinder (24), driving a pressing plate (25) with an arc surface (25 a) to perform profiling movement along the outer annular surface of the cylindrical pipe (4), gradually pressing the stainless steel sheet into a cylindrical shape, and ensuring that two ends of a joint are tightly attached; s3, diameter adjustment, namely if a cylinder with a small diameter needs to be processed, controlling the electromagnet (7) at a corresponding level to be powered off, driving the first electric push rod (3) to shrink, enabling the outermost cylindrical pipe (4) to axially move, exposing a working surface of a mold core with a target diameter, and repeating the step S2 to finish rolling; s4, back gas protection, namely after the rolling is completed, the joint is aligned to the groove (4 a), pure nitrogen is introduced into the groove (4 a) through an air inlet pipe (42), the air bag (43) is expanded to seal a gap between the groove (4 a) and the cylindrical stainless steel sheet, and meanwhile, air in the groove is replaced by the pure nitrogen through an exhaust pipe (41) to form a back protection environment; S5, welding protection preparation, namely controlling a fourth electric push rod (56) to drive a protective shell (58) to move downwards, so that a closed space is formed among the protective shell (58), a rubber strip (62) and the stainless steel sheet, then discharging air in the space through an air outlet pipe (59), and introducing mixed protective gas consisting of 90% -95% of argon and 5% -10% of nitrogen through a second conveying pipe (61); s6, starting a welding gun (55), controlling the third electric sliding block (53) to move at a constant speed along the third electric sliding rail (52), and welding joints; S7, front protection after welding, namely discharging mixed gas in a protective shell (58) after welding is finished, and filling pure nitrogen into the shell through a first conveying pipe (60) to perform front protection on the high-temperature welding seam; And S8, demolding, namely when the cylindrical stainless steel sheet is required to be taken down from the cylindrical pipe (4), controlling the second electric push rod (33) to enable the fixed plate (34) to move downwards, enabling the fixed plate (34) not to tightly prop against the stainless steel sheet, controlling the second electric slide block (32) to slide rightwards on the second electric slide rail (31), enabling the cylindrical stainless steel sheet to be separated from the cylindrical pipe (4), and then taking the cylindrical stainless steel sheet down from the electric sucking disc (35) through a worker or an electric clamp.

Description

Double-phase stainless steel sheet welding device and process Technical Field The application relates to the technical field of welding, in particular to a double-phase stainless steel sheet welding device and a double-phase stainless steel sheet welding process. Background With the continuous development of industrial production, the stainless steel sheet is widely applied to various fields, such as automobile manufacture, household appliances, aerospace, kitchen ware manufacture and the like, which put forward the requirements of high precision, high efficiency and high quality on welding technology and promote the continuous progress of the welding technology of the stainless steel sheet due to the excellent corrosion resistance, attractive appearance and mechanical properties of the stainless steel sheet. However, the prior stainless steel sheet rolling welding process has obvious technical defects that firstly, in the rolling forming process, the integral mold cores and matched forming equipment are required to be frequently replaced aiming at the processing of the cylinders with different diameter specifications, so that the production continuity is interrupted, the equipment adjustment time is overlong, the labor intensity is increased, and the production efficiency and the equipment utilization rate are severely restricted; Secondly, in terms of the welding process, the welding process of the duplex stainless steel 2205 sheet (the thickness range is 0.8-2.0 mm) faces serious metallurgical challenges, namely, the austenite phase ratio of a welding line area is obviously reduced compared with that of a base metal (the ideal two-phase structure is that austenite and ferrite account for about 50 percent respectively), the unbalance of the austenite phase ratio directly causes serious degradation of the corrosion resistance and the mechanical property of a welding joint, and in addition, the traditional welding method lacks an effective molten pool protection and an accurate heat input control mechanism, the high-quality single-side welding double-side forming process is difficult to realize, and the stability of the structural property of the welding line cannot be ensured. Disclosure of Invention In order to solve the problems of the prior art, the application aims to provide a double-phase stainless steel sheet welding device and a double-phase stainless steel sheet welding process. The application relates to a double-phase stainless steel sheet welding device, which comprises an underframe, wherein a mounting plate is fixedly connected on the underframe; the telescopic end of the first electric push rod is provided with a set of multistage telescopic mechanism which consists of a plurality of iron cylindrical pipes, the diameter of the cylindrical pipes is sequentially reduced from the outermost layer to the innermost layer by adopting a concentric nested telescopic design, a fixed rod is fixedly connected to the mounting plate, a cross is fixedly connected to the fixed rod, the cross is fixedly connected with the cylindrical pipe at the innermost layer, and an electromagnet is fixedly connected to the inner ring surface of the cylindrical pipe; the stainless steel sheet is pressed into a cylinder shape under the cooperation of the cylinder pipe, the welding mechanism is connected to the mounting plate, and the welding mechanism can weld the connecting part of the stainless steel sheet in the cylinder shape. Furthermore, it is particularly preferred that a cavity for receiving the cooling liquid is provided inside the cylindrical tube, and that the cavity in the cylindrical tube is connected with a liquid inlet tube and a liquid outlet tube. In addition, it is particularly preferable that the pressing mechanism comprises an electric sliding rail fixedly connected with the inner wall of the mounting plate, a first electric sliding block is connected to the electric sliding rail in a sliding manner, a supporting plate is fixedly connected to the first electric sliding block, a hydraulic cylinder is fixedly connected to the supporting plate, and a pressing plate is fixedly connected to the telescopic part of the hydraulic cylinder. Furthermore, it is particularly preferred that one side of the pressing plate is provided as a cambered surface. In addition, it is particularly preferable that the device further comprises a moving mechanism, wherein the moving mechanism is connected to the underframe, a second electric push rod is fixedly connected to the moving mechanism, and a fixing plate is fixedly connected to the second electric push rod telescopic part. In addition, it is particularly preferable that the cylinder tube is provided with a groove, the cylinder tube is penetrated with an exhaust tube and an air inlet tube, the port of the exhaust tube is positioned at the rightmost end of the groove, an air bag is fixedly connected in the groove, the air bag is communicated with a fixing tube, and the fi