CN201565713U - Point-welding device for vibration reduction composite board - Google Patents

Abstract

The utility model discloses a point-welding device for vibration reduction composite boards. The point-welding device comprises a pressurization cylinder, an electromagnetic valve, an air pressure adjustor, a welder body, a microcomputer controller, a condenser, an upwardly protruded welding station, an electric welding head, a transformer, a downwardly protruded welding station, an electrode arm, an electrode holding stem, a cooling water distribution valve, a pedal switching power supply and a cooling water outlet pipe, wherein the pressurization cylinder, the electromagnetic valve, and the air pressure adjustor are fixed above the welder body; the microcomputer controller is positioned inside the welder body; the transformer is positioned below the microcomputer controller; the condenser is connected with the electric welding head; the electric welding head is fixed on the upwardly protruded welding station; the electrode holding stem is fixed with the downwardly protruded welding station through the electrode arm; both of the cooling water distribution valve and the cooling water outlet pipe are positioned on the same side of the welder body; and the pedal switching power supply is fixed on the welder body. The point-welding device provided by the utility model facilitates the welding among the vibration reduction composite boards.

Description

The spot welding device of damping clad plate

Technical field

The utility model relates to a kind of spot welding device, particularly a kind of spot welding device of damping clad plate.

Background technology

Damping clad plate is to add the damping binding agent to be composited between metallic plate (or claiming substrate), and damping clad plate is used for each industrial circles such as aviation, shipping in a large number, but the damping binding agent between damping clad plate is non-conductive, so the welding difficulty.

The utility model content

Technical problem to be solved in the utility model provides a kind of spot welding device of damping clad plate, and it makes between damping clad plate and welds easily.

For solveing the technical problem, the utility model provides a kind of spot welding device of damping clad plate, it is characterized in that, it comprises and adds air cylinder, magnetic valve, barostat, the welding machine fuselage, microcomputerized controller, condenser, the epirelief welding stage, the electric welding head, transformer, following projection welding platform, horn, electrode holder, the cooling water distributing valve, floor push power supply and cooling water outlet pipe, add air cylinder, magnetic valve and barostat are fixed on the top of welding machine fuselage, microcomputerized controller is arranged in the welding machine fuselage, transformer is positioned at the below of microcomputerized controller, condenser is connected with the electric welding head, the electric welding head is fixed on the epirelief welding stage, electrode holder is fixed by horn and following projection welding platform, cooling water distributing valve and cooling water outlet pipe are positioned at the same side of welding machine fuselage, and the floor push power supply is fixed on the welding machine fuselage.

Positive progressive effect of the present utility model is: the spot welding device of the utility model damping clad plate makes between damping clad plate and welds easily.

Description of drawings

Fig. 1 is the Facad structure schematic diagram of the spot welding device of the utility model damping clad plate.

Fig. 2 is the side structure schematic diagram of the spot welding device of the utility model damping clad plate.

Fig. 3 is the principle schematic in spot welding device when welding of the utility model damping clad plate.

The structural representation of weldment contact-making surface when Fig. 4 welds for the utility model.

The specific embodiment

Lift a preferred embodiment below, and come the clearer the utility model that intactly illustrates in conjunction with the accompanying drawings.

As depicted in figs. 1 and 2, the spot welding device of the utility model damping clad plate comprises and adds air cylinder 1, magnetic valve 2, barostat 3, welding machine fuselage 4, microcomputerized controller 5, condenser 6, epirelief welding stage 7, electric welding 8, transformer 9, following projection welding platform 10, horn 11, electrode holder 12, cooling water distributing valve 13, floor push power supply 14 and cooling water outlet pipe 15, add air cylinder 1, magnetic valve 2 and barostat 3 are fixed on the top of welding machine fuselage 4, microcomputerized controller 5 is arranged in welding machine fuselage 4, transformer 9 is positioned at the below of microcomputerized controller 5, barostat 3 is regulated the bleed pressure size to reach best welding pressure, condenser 6 and electric welding 8 is connected, electric welding 8 is fixed on the epirelief welding stage 7, electrode holder 12 is fixed by horn 11 and following projection welding platform 10, cooling water distributing valve 13 and cooling water outlet pipe 15 are positioned at the same side of welding machine fuselage 4, and floor push power supply 14 is fixed on the welding machine fuselage 4.According to damping clad plate thickness, each parameter value is set on microcomputerized controller 5.Two damping clad plates of need welding are put between electric welding 8 and the electrode holder 12, and clamped two damping clad plate short circuits with short circuit from pad 60～100mm place.Start floor push power supply 14, microcomputerized controller 5 systems start, magnetic valve 2 and add air cylinder 1 work, and electric welding 8 is shifted to workpiece and is pressurizeed.The pressurization time-delay finishes (squeeze time) microcomputor program and enters welding, it is the controllable silicon conducting, connect transformer 9, workpiece begins to add thermal weld and finishes to enter until weld interval and keep order, after being the welding current cut-out, the time delays that pressure still keeps, this guarantees that welding machine unclamps electrode later at the reliable welding current that cuts off time, prevents the arcing process that charged disconnection welding circuit causes and influences the solder joint surface quality.So far, finish the welding of a solder joint.

As shown in Figure 3 and Figure 4, owing to the binding agent 17 of 16 of metallic plates is non-conductive, so electric current passes through along short circuit pincers 18 through A and B point.And electric current because A and B point contact resistance exist, produces and generates heat during by A and B point.Under electrode force F effect, make the binder decomposed between metallic plate, cause short circuit between metallic plate.Under electrode force F and powerful welding current i effect, on the weldment contact-making surface, form real physics contact point, and constantly enlarge along with the carrying out of energising heating.Plasticity becomes and can the atom that be in contact with one another constantly be activated with heat energy, and the contact-making surface that disappeared continues to add thermosetting fusing core, is called for short nugget.Strong agitation takes place in the liquid metal in the nugget under electrodynamic action, the metal ingredient homogenising of two plates in the nugget, and combination interface rapidly disappears.After heating stops, the core liquid metal is that nucleus begins crystallization with the semi-molten grain surface on the minimum nugget border of free energy, constantly grow with the cylindrulite form to centre extension, nugget along the heat radiation rightabout then with the dendrite form, the composition that alloy concentrations is higher drains into brilliant fork and dendrite front end, prop up mutually until dendrite, obtain firm metal bonding.

The thermal source of the spot welding device spot welding of damping clad plate is the resistance heat that electric current produces by the weld zone, and according to Joule's law, heat W is following formula (1), and unit is joule (J):

$W={\∫}_0^{\mathrm{tw}}{i}^2\left(t\right)R\left(t\right)\mathrm{dt}$ Formula (1)

I in the formula (t) expression is by the transient current (unit is ampere A) of weld zone, and the resistance of R (t)-weld zone (unit is ohm Ω), tw are represented weld interval (unit is s second).

The spot welding device of the utility model damping clad plate is furnished with microcomputer welding resistance controller, can to transient current i (t) and weld interval tw carry out meticulous, level and smooth adjusting, to obtain best welding conditions.Microcomputer welding resistance controller can be selected constant current or constant voltage control mode by the parameter setting, and the sampled signal and the setting value of welding current/voltage compared, and change triggers phase shifting angle to reach the purpose of keeping welding current/voltage constant automatically.

Though more than described the specific embodiment of the present utility model, but those skilled in the art is to be understood that, these only illustrate, and under the prerequisite that does not deviate from principle of the present utility model and essence, can make numerous variations or modification to these embodiments.Therefore, protection domain of the present utility model is limited by appended claims.

Claims (1)

1. the spot welding device of a damping clad plate, it is characterized in that, it comprises and adds air cylinder, magnetic valve, barostat, the welding machine fuselage, microcomputerized controller, condenser, the epirelief welding stage, the electric welding head, transformer, following projection welding platform, horn, electrode holder, the cooling water distributing valve, floor push power supply and cooling water outlet pipe, add air cylinder, magnetic valve and barostat are fixed on the top of welding machine fuselage, microcomputerized controller is arranged in the welding machine fuselage, transformer is positioned at the below of microcomputerized controller, condenser is connected with the electric welding head, the electric welding head is fixed on the epirelief welding stage, electrode holder is fixed by horn and following projection welding platform, cooling water distributing valve and cooling water outlet pipe are positioned at the same side of welding machine fuselage, and the floor push power supply is fixed on the welding machine fuselage.

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