CN2130634Y

CN2130634Y - Stud welding gun

Info

Publication number: CN2130634Y
Application number: CN 92201315
Authority: CN
Inventors: 郭齐江; 庄德元; 井效天
Original assignee: TIANJIN WELDING INST
Current assignee: TIANJIN WELDING INST
Priority date: 1992-01-24
Filing date: 1992-01-24
Publication date: 1993-04-28
Anticipated expiration: 2002-01-24

Abstract

The utility model discloses a screw bolt gun. The convex end section of the point (8) of an iron core (7) is contacted and connected with a movable electrode which is arranged in a cylinder barrel sleeve (3). The section of the electrode passing through a supporting cover (11) is provided with a guard disc (18) through a sleeve barrel (17), and an auxiliary spring (19) is arranged between the guard disc and the supporting cover (11). A working gap of 0.5-5 mm is arranged between the end surface of the electrode and a regulating mechanism. A main spring determines upsetting force, and the auxiliary spring can ensure good and exact arc starting and burning, which provides convenience for the regulation for standards when metallic materials are selected for welding, improves welding quality and expands the range of application of the welding gun.

Description

Stud welding gun

The utility model relates to a kind of stud welding gun.

Current in capacitor discharge welding, be that the arc heat that utilizes the electric capacity repid discharge to produce fuses the double-screw bolt apiculus suddenly, also produced local melting by the weldering metal works simultaneously, double-screw bolt is pressed in the workpiece molten bath, thereafter arc extinguishing is finished welding, and this all works and normally finishes within 12 milliseconds.General employed welding gun is a kind of to be used for initial contact welding, and it has a definite working spring, by spring the active force of electrode and dop is implemented welding during work.Another kind is used for the welding of primary clearance formula, and electromagnet and working spring are housed in the rifle, and electromagnetic actuation iron core before the welding compresses spring simultaneously, release magnet during work, and spring compressing workpiece, discharge, arc extinguishing are finished welding simultaneously.Under normal circumstances can normally carry out work, but their main deficiency still is: for selected different Metal Material Welding, the standard adjustment of the starting the arc, arcing and upset force is difficult to carry out, adjust the improper welding quality that then influences, during for the welding of high conductivity metal material, adjust more difficult, and even maybe can't weld and can not use because of welding quality is too poor.

The purpose of this utility model overcomes known technology, and weak point provides a kind of improved stud welding gun.

The purpose of this utility model is achieved in that the nose portion contact at 8 places of iron core (7) connects the energy movable electrode of dressing in cylindrical sleeve (3), that section that electrode passes behind the support lid (11) upward is equipped with block plate (18) by individual sleeve (17), between dish and support lid (11) secondary spring (19) is housed.Be provided with the working clearance of 0.5-5 millimeter between the end face of electrode and the guiding mechanism.

Guiding mechanism is made of the screw thread stage casing of iron core (7) and the nut (21) that is equipped with on it.

The nose portion contact that (8) of said iron core (7) are located connects electrode, can locate to be shaped on blind hole in electrode (12) (13), and this end face of the opening of blind hole is equipped with the door (14) that can pass the iron core axle journal, holds iron core nose portion in the hole and constitutes; T-slot is made in the end that can be electrode (15), holds iron core nose portion in the translot of T word and constitutes; The crochet groove is made in the end that can also be electrode (16), holds iron core nose portion in the groove and constitutes.

Advantage of the present utility model: because main spring has been determined upset force, and secondary spring can ensure well and the accurately starting the arc and arcing, standard adjustment when this has just made things convenient for selected Metal Material Welding, and the range of application that helps improving welding quality and enlarge welding gun.

Description of drawings:

Fig. 1 is a kind of stud welding gun, and electromagnet is in the main cutaway view that the attracting state secondary spring is in free state;

Fig. 2 is that iron core nose portion is connected partial sectional view with the contact of electrode T-slot;

Fig. 3 is that iron core nose portion is connected partial sectional view with the contact of electrode hook groove.

Below in conjunction with Fig. 1---3 describe details and the working condition according to the concrete device that the utility model proposes in detail.

This device comprises that a terminal filament links and connects end cap 1 and be connected with screw and supplied line with hollow and adorning the pikestaff 2 of push-button switch, and top, the middle part of cylindrical sleeve is shaped on for the window of regulating operation usefulness and below and has the usefulness cylindrical sleeve 3 made of insulating material that supplied the open slot that line uses.The end cap that reclines in the cover is equipped with auxiliary iron core 4 successively, is communicated with the solenoid 5 of power supply, the magnetic conductance seat 6 of steel through switch, auxiliary iron core 4, solenoid 5, magnetic conductance seat 6 threes are positioned on the same axial line, also be equipped with on its direction of axis line can be movable circular bar shape steel iron core 7, its one section is gone up to preventing that iron core from rotating and the cross section that key 22 that an energy slides along the magnetic conductance seat keyway also is shaped on screw thread stage casing, axle journal and 8 places is installed is circular or square nose portion.The accent mother 9 of the approximate circular plate type of circumference uniform distribution system opening or annular knurl is housed on the iron core screw thread stage casing, between it and the magnetic conductance seat main spring 10 is housed, constitute the guiding mechanism of main spring.The other end of cylindrical sleeve is installed the support lid 11 that an insulating materials that has a through hole is made, uniform 3 support bars and the not shown support fixed of its outer circumference with screw.The contact of the nose portion of iron core 7 is connecting the whole cylindrical electrode made from good conductive material such as brass, aluminium that can be movable of ladder that is in the cylindrical sleeve, and it is communicated with to weld by switch uses power supply.So-called contact connects, perhaps 13 places that are electrode 12 are shaped on a blind hole, this end face of the opening of blind hole is installed one with screw and is shaped on and the be slidingly matched opposite opened door 14 in hole of iron core axle journal, can certainly be that whole door is contained in iron core nose portion on the axle journal with screw thread or screw, realize that iron core nose portion is contained in the hole; Perhaps T-slot is made perpendicular to the electrode axial line in the end that is electrode 15, holds iron core nose portion in the translot of T word; The crochet groove is made in the end that also perhaps is electrode 16, holds frame mode formations such as iron core nose portion in the groove.Electrode passes the support lid and stretches out outside the cylindrical sleeve 3, and the electrode circle slip cap is equipped with a brazen sleeve 17 of usefulness, and block plate 18 of installation of the outer adjustable axial location of tube is equipped with secondary spring 19 between dish and the support lid.Be fixed with dop 20 in the sleeve, in it, can the soldered double-screw bolt of plug-in mounting.Distance electrode in cylindrical sleeve (containing door) end face 0.5---5 millimeters places promptly are referred to as the working clearance, be provided with guiding mechanism, it is to constitute by on the screw thread stage casing of iron core nut 21 being housed, nut has the end face that an energy contacts with electrode end surface, be shaped on the outermost circle for annular knurl or opening and the scale mark of adjusting usefulness, can put in order joint nut location, the i.e. working clearance by the cylindrical sleeve top window.

Working condition is such, coil electricity, and pull-core compression main spring, the while iron core hauls electrode (the said working clearance still remains unchanged) and slides in the same way.With the double-screw bolt end and by the weldering metal works really allocation contact, and be depressed into strut top and contact with workpiece, in this compressing process, double-screw bolt is by sleeve, block plate compression secondary spring, electrode will be done the slip (not shown) of direction left simultaneously, cause the working clearance to be dwindled, and the nose portion that is in the iron core of the state of maintaining static still is contained in the hole or slot space of electrode.Under the reaction force acts of this secondary spring, make double-screw bolt end and workpiece have good the contact, the specification requirement of the starting the arc and arcing when this contact can be satisfied selected Metal Material Welding.Electrode is communicated with capacitor discharge (being the starting the arc, arcing) by switch, and through behind the appropriate time, release magnet mainly is the elastic force that recovers initial state according to main spring, to the double-screw bolt axial pressure, finishes welding by electrode and associated part.

Claims

1, a kind of stud welding gun, be to have in the cylindrical sleeve (3) of window by end cap (1) and support with holes lid (11) and middle part are housed respectively at two ends, the end cap (1) that reclines is equipped with auxiliary iron core (4) successively, solenoid (5), magnetic conductance seat (6), the three is positioned on the same axial line and is also adorning on the direction of axial line and is shaped on the movable round bar shape iron core (7) of screw thread stage casing energy, be loaded between the accent mother (9) in screw thread stage casing and the magnetic conductance seat (6) main spring (10) that can adjust is housed, cylindrical sleeve (3) is also connecting the pikestaff (2) that is provided with inner chamber and is adorning push-button switch and is forming, it is characterized in that the nose portion contact of (8) of iron core (7) locating connect dressing in cylindrical sleeve (3) in can activity electrode, that section that electrode passes behind the support lid (11) upward is equipped with block plate (18) by individual sleeve (17), between dish and the support lid (11) secondary spring (19) is housed; Be provided with the working clearance of 0.5--5 millimeter between the end face of electrode and the guiding mechanism.

2, welding gun according to claim 1 is characterized in that guiding mechanism is made of the screw thread stage casing of iron core 7 and the nut (21) that is equipped with on it.

3, welding gun according to claim 1, the nose portion contact that it is characterized in that 8 places of said iron core (7) connects electrode, can locate to be shaped on blind hole in electrode (12) (13), this end face of the opening of blind hole is equipped with the door (14) that can pass the iron core axle journal, holds iron core nose portion in the hole and constitutes.

4, according to claim 1 or 3 described welding guns, the nose portion contact that it is characterized in that 8 places of said iron core 7 connects electrode, T-slot is made in the end that also can be electrode (15), holding iron core nose portion in the translot of T word constitutes, can also be electrode (16) the end make the crochet groove, hold iron core nose portion in the groove and constitute.