Principle and cons懂明truction of Northrend resist通窗ance welding m

發(fā)布時(shí)間：2020-04-25 2謝得2:17浏覽次數：次

Principle of res多小istance welding machine

Resistance welding ma愛水chine is to weld m報算etal and metal together. It 就上is composed of a wel煙船ding head holding很報 metal and applying pressure an工物d a welding power supply ou也事tputting current.

Resistance is the resistance oppo很畫site to the direction木下 of travel, simila現船r to the heatin舞花g phenomenon caused by fr銀愛iction when braking. When the same c笑子urrent flows in two metals, the嗎站 resistance of the met文哥al itself and the resist地子ance of the contact p來黃art will generate heat. Resi厭爸stance welding uses this Joule了人 heat and pressure to著制 weld metals together.

Composition and習從 function of resistance welding mach自輛ine

Resistance welding is t算音o hold the object to be welded w黑算ith electrodes, apply pres內村sure and power on at the same time.

Welding power supply地可: control the size, 年遠time and waveform of welding curr分嗎ent.

Welding transforme白西r: change the current 長長controlled by power sup吃少ply into large current.年那

Welding head: control pr去頻essure.

Welding electrode:城視 apply pressure and區現 power to the welded ob商暗ject.

Temperature distributi海子on of resistance we喝信lding

Power on mode of welding cu去我rrent

Generally, there are three kinds of met腦跳hods to determine the welding cur上師rent from the shape of the welding o紙姐bject. In addition, differ明日ent pressure is applied to diff為車erent methods of power on, an自筆d the corresponding welding joi站低nts are selected ac員理cordingly.

The type and specialty of r線土esistance welding power supply refer t短著o the device controlling welding 服生current. According to the contro議呢l mode, it can be divided into four ty資也pes: high frequency type,用房 transistor type, cap空綠acitor energy storage type 物冷and AC type, corresponding拍裡 to a variety of weldi微分ng objects.

Characteristics /店就 forms	Alternating current	Capacitor energy storage type	Transistor type	High frequency type
Welding spark prevention	○	△	◎	◎
Stability in ca金窗se of power supply change	△	◎	◎	◎
Welding efficiency	○	△	△	◎
Feedback control	no	no	yes	yes
Speciality	Copper wire, plate	Small thermal impac弟訊t	Micro components	Non sparking welding