CN1311076A

CN1311076A - Continuing welding rod

Info

Publication number: CN1311076A
Application number: CN 00111885
Authority: CN
Inventors: 吴兆宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-03
Filing date: 2000-03-03
Publication date: 2001-09-05

Abstract

This invention discloses a flux-covered welding electrode, the front tip (arcing end) of the said electrode has a short sleeve fixed on its core and then coated with flux. The gap formed in the arcing short tube is just for being able to recieve the insertion of bare electrode core metal of grip end of another welding electrode so that the welding electrodes can be mutualling connected by head-to tail. During head arc welding, the welding electrode end can be effectively recovered. If equidistance electric connecting points are set on the flux conver before welding application, a lot of welding electrodes can be connected by head-to-tail to form continuous flux-covered welding electrode for being widely used in different cases.

Description

Continuing welding rod

The present invention relates to a kind of covered electrode, is the welding material of manual electric arc welding, also can be used for continuously welding automatically simultaneously.

The general straight covered electrode of weak point has been used a nearly century industrial at present.Advantage such as have that cost is low, the scope of application is wide, weld metal inherent quality and appearance forming quality are good.But because resistance heat can cause the coating cracking or come off, restricted the length of welding rod, generally be limited in below the 460mm.Therefore in welding process, need often to change welding rod, cause that efficient is low, joint is many, and the proportion of goods damageds of " discard electrode " are big, consume 500,000 tons of welding rods year in China, the several hundred million units of annual waste.Methods such as (" welding rod is selected guide for use ", chemical industry publishing house, second edition in 1996, the 273rd page) gas shielded arc welding have realized continuous welding, but also have the cost height, big, the shortcoming such as equipment is complicated and heavy, weld metal is second-rate of splashing.

The object of the invention provides a kind of new covered electrode, and its joint length and the general straight welding rod of weak point are much the same, can be end-to-end mutually on the structure, be that stick electrode also can be made continuous welding rod and uses, and price is lower.

The present invention includes core wire, coating, the center of welding rod head (arc end) has one section to be empty, and the core wire metal that just in time afterbody (bare terminal end) of another root bead bar can be exposed inserts, thereby realizes being end-to-end.

The advantage of continuing welding rod is the function that has short straight welding rod and continuous welding rod concurrently.As stick electrode,, thereby save cost about 15% because the waste of resources such as core wire and coating has been avoided in the utilization again of " discard electrode "; As continuous welding electrode, it does not need special equipment to make with existing stick electrode production equipment, thereby has saved investment.Tangible economic benefit and social benefit are arranged, and prospects for commercial application is very wide.

Further set forth design of the present invention and working condition below in conjunction with drawings and Examples.

Fig. 1 is the front view of continuing welding rod.1. arc end, 2. short sleeve, 3. core wire, 4. coating, the 5. exposed core wire metal of bare terminal end.

Fig. 2 is the profile of arc end.1. arc end, 2. short sleeve, 3. core wire, 4. coating, the 5. exposed core wire metal of bare terminal end, 6. filler.

Embodiment one

Use the stalloy identical to do one section internal diameter earlier and be a bit larger tham the core wire external diameter with the core wire material, length slightly is longer than the short sleeve (2) of the exposed core wire of bare terminal end, then it is fastened on an end of the core wire (3) that processes, the length that short tube stretches out core wire equates with the exposed core wire metal (5) of bare terminal end.The core wire that this end is equipped with short sleeve promptly gets continuing welding rod through extrusion, mill tail, drying and post processing.Insert in the formed space of arc end short tube " discard electrode " cold slightly back during use that last root bead bar is remaining, in order to strengthen both connection fastness, can add a filler (6).The same as with general manual welding rod then the soldering turret welding, when melted the coupling part, short tube entered bath with core wire.

Embodiment two

The some continuing welding rods that make as embodiment one are levied the electric contact shaping machine equal intervals leave electric contact, head and the tail couple together then, length can satisfy the requirement of long weld seam continuous welding, arc end at the first root bead bar inserts one " discard electrode " again, implements continuous welding with continuous transmission gun.

Claims

1. the straight covered electrode of weak point comprises coating and core wire, it is characterized in that the head (arc end) of welding rod can be connected mutually from beginning to end with afterbody (bare terminal end).

2. as claims 1 described welding rod, it is characterized in that preceding one section short sleeve of adjunction of core wire of striking end, the short tube internal diameter is a bit larger tham the core wire external diameter, stretches out the length of core wire and the equal in length of the exposed core wire metal of bare terminal end, and the outside is coated with coating again.

3. as claims 1 and 2 described welding rods, it is characterized in that having in the arc end short tube filler to strengthen the fastness that is connected between the exposed core wire metal of bare terminal end and the arc end short tube.

4. as the production method of claims 1 and 2 described welding rods, it is characterized in that at one end adorning one section short sleeve earlier before core wire is coated with coating, all the other can adopt the manufacturing of known welding rod production method.