CN201175803Y

CN201175803Y - Welding head for electronic spot welding machine

Info

Publication number: CN201175803Y
Application number: CNU2008200929925U
Authority: CN
Inventors: 吴云龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-02
Filing date: 2008-04-02
Publication date: 2009-01-07
Anticipated expiration: 2018-04-02

Abstract

Disclosed is a fixed heater welding head for a spot welder. A welding end face and a welding head lateral face are chamfered to obtain transition. The area of a welding plane is close to or equal to that of a heater. The welding head is made of a cylindrical metal rod with high melting point via cutting, and the cylindrical rod is cut from the middle to form two guide portions of electrodes. A preserved portion is connected to the bottom end of the welding head to form the heater. The guide portions and the middle heater form a current path, and as the heater and the guide portions are made of the same material with the same small cross section area, the heater has high electric resistivity and the welding is completed by high temperature electrically generated when the current flows through. The welding plane and the welding head lateral face are chamfered to obtain transition, the area of the welding plane is close to or equal to that of the middle heater, and the heat distribution of the heating surface is uniform and concentrated. The provided welding head of a spot welder is more stable in welding quality, less in maintenance and longer in service life.

Description

Point welding machine welding head

Technical field

The utility model relates to a kind of point welding machine welding head.

Background technology

Soldering tip is a most important consumptive material in the electric spot welding machine welding process, is made up of two electrodes parallel to each other (electric current leading end), and the front end of electrode is that its tip is commonly called as tip.The CN03261340.7 patent discloses a kind of soldering tip in specification: " with a joint metallic rod intermediate section cutting get and the tip position link to each other ".The disclosed soldering tip of patent No. CN200520120768.9 is: " tip of two electrodes of soldering tip fuses ".All to be them forms two electrodes (electric current leading end) and (tip) position, tip connects together as the hot zone by cutting open in the middle of the bar-shaped metallic object with the soldering tip of this two patent disclosure, on demand difformity is processed in the hot zone then.These soldering tips of prior art are independent fully for two electrodes, most advanced and sophisticated (tip) position adopts the soldering tip of low ohm value contact to have the advantage that tip (tip) connecting portion does not produce electric spark, but its shortcoming is also arranged: as shown in Figure 4: because of the solder side at soldering tip tip is a plane, and the hot zone only is in the mid portion of the right and left, solder side is much larger than the hot zone, thermal source is welded to both sides diffusion and realization by the centre, because the heat conducting time difference, the heat of its face of weld is distributed uneven.Because heat concentrates in the middle of the soldering tip, its centre is easy to turn black oxidation and damages again, has influenced the quality of welding and the service life of soldering tip.

Summary of the invention

The utility model is to produce and use on the experiential basis of electric spot welding head in research and development for many years, and stable more, the few maintenance of a kind of welding quality, the point welding machine welding head of long life more are provided.

The utility model is that the technical scheme that its technical purpose of realization is adopted is: the width of soldering tip tip (tip) solder side equates with two current-steering section hatching line width, solder side and the chamfering transition of soldering tip side.

Concrete mode of the present utility model links to each other (not cutting) for earlier the vertical five equilibrium of a cylindrical refractory metal being cut into two its tips of current-steering section (tip) part, and the width of solder side is equated with two current-steering section hatching line width.

Two current-steering sections form a current path, and its current path is equivalent to a cable, and cross-sectional area equates; Because the axial cross section of solder side is long-pending more much smaller thereby form a resistance than other position,, welding current converts welding when producing electricity-Re during by this resistance.

The beneficial effects of the utility model are: (1) pyrotoxin promptly equals solder side, thereby the extremely low energy savings of energy loss.(2) the welding plane does not have the heat conducting time difference, because of the even welding quality stable of heat energy distribution.(3) rapid heat dissipation, the soldering tip long service life.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the utility model front view.

Fig. 2 is the utility model side view.

Fig. 3 is a welding ends partial enlarged drawing of the present utility model.

Fig. 4 is the welding ends partial enlarged drawing of prior art soldering tip.

Among the figure: (1,2). the electric current leading end; (3) fixed insulation thing; (A, B). the chamfering of solder side and soldering tip side; (D). the gauge of heater; (H). the width between two current-steering sections; (Hw). solder side width of the present utility model;

The specific embodiment

Referring to accompanying drawing, the utility model includes two electric current leading ends (1,2), the position, tip, front (tip) of electric current leading end links to each other, it is characterized in that: the width (Hw) of most advanced and sophisticated (tip) solder side equates solder side and the chamfering transition of soldering tip side with two current-steering section joint face width (H).

So-called linking to each other specifically continuously and uninterruptedly.And chamfering can be selected between 30 °-60 °, is generally 45 °.

Earlier a cylindrical refractory metal is vertically cut open when the utility model is specifically implemented, be divided into two current-steering sections (1,2); The other end (tip end) of hatching line inlet does not cut reserves thickness as (D), and adhesive or other adhesive insulant (3) with insulation in the middle of it are fixing; That presses welding work pieces then need utilize means such as cutting polishing to form solder side in corresponding position, its width is (Hw), because axial (D) sectional area of this solder side is more much smaller and form a resistance than other position, produces high temperature and weld when welding current produces electricity-Re conversion during by this resistance.

Solder side of the present utility model and soldering tip side chamfering transition (A, B), the practical width of solder side (Hw) equates that with two current-steering section hatching line width (H) promptly solder side itself is exactly a heater; Because there is not the heat conducting time difference, so its heating and heat radiation of whole is all faster, and heat distribution is even

Claims

1, a kind of point welding machine welding head, include two electric current leading ends (1,2), the most advanced and sophisticated position of the front end of electric current leading end links to each other, and it is characterized in that: the width (Hw) of front, most advanced and sophisticated position solder side equates with two current-steering section joint face width (H), solder side and the chamfering transition of soldering tip side.