CN202741918U

CN202741918U - Special projection welding electrode structure for welding bolts

Info

Publication number: CN202741918U
Application number: CN 201220428074
Authority: CN
Inventors: 陈文波; 董思化; 展军伟; 王振伟
Original assignee: One Drags (luoyang) Fu Laige Vehicle Body Co Ltd
Current assignee: One Drags (luoyang) Fu Laige Vehicle Body Co Ltd
Priority date: 2012-08-28
Filing date: 2012-08-28
Publication date: 2013-02-20
Anticipated expiration: 2022-08-28

Abstract

The utility model discloses a special projection welding electrode structure for welding bolts, which comprises an upper electrode and a lower electrode component, wherein the lower electrode component comprises a lower electrode cap, a lower electrode mounting seat, an insulating bush, an insulating cap and a spring; the upper electrode and the lower electrode component are mounted in an upper mounting seat and a lower mounting seat of a projection welder respectively; the spring of the lower electrode component is placed into the lower electrode mounting seat; the insulating cap is buckled up; the insulating bush is mounted in the lower electrode cap; and the lower electrode cap is connected with and mounted on the lower electrode mounting seat by threads. According to the structure, the welding bolts of different specifications can share one lower electrode mounting seat; only the lower electrode cap and the insulating bush in the lower electrode component are required to be replaced when the electrode is abraded; the service life of the electrode is prolonged; the structure of the lower electrode component can avoid shunt of welding current caused by contact among thread parts of the welding bolts and the lower electrode; the quality of weldments is ensured; a spring structure with the insulating cap is additionally adopted; and when the insulating bush is abraded, the deficient quantity of the insulating bush is made up as the spring ejects for leveling.

Description

Weld bolt Special projection welding electrode structure

Technical field

The utility model belongs to field of welding processing, relates to a kind of projection welding electrode, relates in particular to a kind of weld bolt Special projection welding electrode structure.

Background technology

At present, projection welding technique is used widely in machine-building, and the design of welding electrode, fabrication scheme directly affect the enforcement of projection welding technique.The design of weld bolt projection welding electrode structure generally is that monoblock type bottom electrode and the top electrode by the tape insulation hole consists of, during the projection welding bolt, to be put into the metal sheet of welding process hole on the monoblock type bottom electrode first, again weld bolt is passed metal works, stretch into the insulated hole of bottom electrode, top electrode is descending, utilizes the resistance welded principle, by to weld bolt pressurization energising, projection welding put conquassation and merge with plate and weld together securely.Use the shortcoming of existing monoblock type bottom electrode projection welding electrode structure to be: one, versatility is poor: the weld bolt of different size, need the different special-purpose bottom electrode of configuration, cause type of electrodes various, affect production efficiency; Its two, then need integral replacing after the bottom electrode wearing and tearing, causing auxiliary material to consume high welding cost increases; Its three, if in the bottom electrode hole conductive impurity is arranged, then weld bolt bottom can contact with bottom electrode, causes that current distributing causes screw thread to ablate and bonding, affects the weldment quality.

The utility model content

The purpose of this utility model is: a kind of highly versatile, electrode life is long, welding quality is high weld bolt Special projection welding electrode structure are provided.

The technical solution of the utility model is: weld bolt Special projection welding electrode structure comprises: top electrode, bottom electrode assembly, and bottom electrode assembly comprises: bottom electrode cap, bottom electrode mount pad, insulating bushing, insulator cap, spring; Top electrode, lower electric machine assembly are respectively charged in the upper mount pad of projection welder and in the lower mount pad; The spring of lower electric machine assembly is put into the bottom electrode mount pad, buckles insulator cap, and insulating bushing is packed in the bottom electrode cap, and the bottom electrode cap is threaded connection and is installed on the bottom electrode mount pad.

The utility model adopts the good effect that produces after the technique scheme to be: the weld bolt of (one) different size can share a bottom electrode mount pad, only need change bottom electrode cap and insulating bushing.Insulating bushing plays the role of positioning to weld bolt, and its internal diameter is determined by the screw thread specification of weld bolt, with threaded engagement, changes easily between electrode cap and the electrode tip holder.(2) bottom electrode cap and the insulating bushing in the needs replacing bottom electrode assembly behind the wear to electrodes in the service life of having improved electrode, reduced production cost.(3) this bottom electrode assembly structure can avoid the weld bolt threaded portion to contact with bottom electrode and the shunting of the welding current that causes fully, guarantees the weldment quality.(4) insulating bushing is because of the welding wearing and tearing, can cause top and electrode surface uneven, and then welding shunt influence welding quality, this lower electrode arrangement design is by increasing the spring structure with insulator cap, after the insulating bushing wearing and tearing, by the spring ejection levelling, and then the disappearance amount of insulating bushing remedied.

Description of drawings

Fig. 1 is the utility model weld bolt Special projection welding electrode structure energising duty generalized section;

Fig. 2 is that the utility model weld bolt Special projection welding electrode structure takes off electric work state generalized section.

The specific embodiment

Embodiment of the present utility model such as Fig. 1 ~ shown in Figure 2.Weld bolt Special projection welding electrode structure comprises: top electrode 1, bottom electrode assembly 2; Bottom electrode assembly 2 comprises bottom electrode cap 5, bottom electrode mount pad 6, insulating bushing 7, insulator cap 8, spring 9, spring 9 is put into bottom electrode mount pad 6, buckle insulator cap 8, insulating bushing 7 is packed in the bottom electrode cap 5, and bottom electrode cap 5 is threaded connection and is installed on the bottom electrode mount pad 6.Top electrode 1 is packed in the upper mount pad A of projection welder, and lower electric machine assembly 2 is packed in the lower mount pad B of projection welder.Bottom electrode cap 5, insulating bushing 7 are consumable accessory and quick change spare, and insulating bushing 7 materials are heat-resistant and wear-resistant material, and what we selected is fabroil or polyfluortetraethylene pipe.

During work, to be put into the metal works 4 of welding process hole on the bottom electrode assembly 2 first, again weld bolt 3 is passed metal works 4, stretch in the insulated hole of bottom electrode assembly 2, then start welding, top electrode 1 moves downward, and upper/lower electrode is closed tightly, the melting of projection welding point and the metal works 4 of then switching on weld bolt 3 reach combination between atom, finish welding.Bottom electrode assembly 2 keeps the screw thread of weld bolt 3 to be in all the time state of insulation in the welding process, and the spring in the bottom electrode assembly 9 can remedy the disappearance amount at insulating bushing 7 tops.

The utility model structure applicability is strong, and repair and replacement are convenient, improved production efficiency the service life of having improved electrode, reduced production cost, and the threaded portion that can effectively control weld bolt is in state of insulation all the time, avoids the welding damage screw thread.Use this structure can realize the multiple types welding of weld bolt, have the advantages such as the few quality of projection welding defective is good, and then realize the production in enormous quantities of weld bolt projection welding spare.

Claims

1. weld bolt Special projection welding electrode structure, comprising: top electrode (1), bottom electrode assembly (2), bottom electrode assembly (2) comprise bottom electrode cap (5), bottom electrode mount pad (6), insulating bushing (7), insulator cap (8), spring (9); It is characterized in that: with top electrode (1), lower electric machine assembly (2) be respectively charged in the upper mount pad (A) of projection welder, in the lower mount pad (B); The spring (9) of lower electric machine assembly (2) is put into bottom electrode mount pad (6), buckles insulator cap (8), and insulating bushing (7) is packed in the bottom electrode cap (5), and bottom electrode cap (5) is threaded connection and is installed on the bottom electrode mount pad (6).