CN101391349B - Forming roller device for producing overlapping welding wires with overlapped sections - Google Patents

Abstract

The invention relates to a section joining and overlapping welding wire and a molding roller device. The section of the welding wire is composed of a metal external layer, a powder core, and an overlapping and joining part. A staggered overlapping and joining boundary part is molded by a special roll, then is made into circular shape by a press-round roller, enabling the section to be a round welding wire with a joining and overlapping structure after being drawn and pulled. For manufacturing the welding wire of such structure, a pair of staggered boundary molding roller is provided. The staggered joining and overlapping boundary used for rolling the welding wire is provided with an anomalous groove, and a lower roller is provided with a convex arris with the same width of an upper roller. The roller device is applicable to the flux-cored welding wire molding of all kinds of materials and specifications, avoiding the leakage of the powder, preventing pollutants and water from going into the core and ensuring a stable quality of the welding wire.

Description

Forming roller device for producing overlapping welding wires with overlapped sections

1. Technical field

The invention relates to machinery and equipment for welding material manufacturing and metal product industries, in particular to a device with cross-section overlapping welding wire and forming rolls. the

2. Background technology

In the production of existing welding materials such as welding wire, that is, with flux-cored wire, according to the conventional requirements of the strip forming method, the cold-rolled coil steel is cut into narrow strips, rolled into "U"-shaped grooves, filled with powder, and then Rolled into "O" shaped tube billets, further rolled and drawn into filaments. Since the joint surface of the "U"-shaped groove rolled into the "O"-shaped pipe is a plane connection, it is difficult to avoid a small gap in the butt joint, and it is easy to leak the powder during processing. After processing into a finished product, due to long-term storage and transportation, Its impurities, dirt, moisture and moisture can easily enter the inner core through the micro-slits and affect the quality of the welding wire. In view of this defect, we start from the lap joint interface of the welding wire to overcome this defect. In order to realize the lap joint interface structure of the outer tube The production of staggered overlapping forming rolls is also specially designed for the production of welding wire with overlapping sections. the

3. Contents of the invention

The object of the present invention is to provide a cross-section overlapping overlapping welding wire and forming roll device. In order to obtain overlapping welding wire with overlapping parts, the steel strip that has been bent into a "U" shape is first bent, and the two sides are bent into a "U" shape. Before rounding, the two sides are staggered so that the subsequent deformation will overlap. A pair of forming rolls for staggered sides and rounding forming rolls are designed. The two sets of rolls are composed of upper rolls and lower rolls. One set of rolls The two sides of the "U"-shaped steel strip are staggered. After the staggered, another set of rolls rolls the "U"-shaped strip with the staggered sides into a circle, so that the welding wire forms a staggered overlapping part at the junction of the seam. , other processes such as drawing and generating equipment are the same as the existing ones. The beneficial effect of such overlapping structure welding wire is to prevent the leakage of powder in the core, and also prevent external pollutants, various corrosive gases and moisture from entering the inside, thereby maintaining the stability of welding wire quality. the

4. Description of drawings

Fig. 1 is the cross-sectional structure schematic diagram of existing welding wire;

Fig. 2 is the cross-sectional structural diagram of overlapping welded wire of overlapping section of the present invention;

In Fig. 2: 3-metal outer layer, 4-powder powder core, 5-overlapping part, 6-outer seam. the

Figure 3 is a schematic diagram of the section structure of the production section lapped overlapping welding wire staggered forming roll;

Fig. 4 is a schematic diagram of the cross-sectional structure of the roll formed by lapping and overlapping welding wires in the production section. the

Among Fig. 3, 4: 1-upper roll, 2-lower roll. Among them, in Fig. 3: B-roll groove width, R-the radius of the upper arc in the groove, r-the radius of the lower arc in the groove, h-half of the groove width, n-the height difference between the upper arc and the lower arc. the

5. Specific implementation

The specific embodiment of the present invention will be described in further detail below with reference to the accompanying drawings. the

The cross-section overlapping welding wire and the forming roll device of the present invention, wherein the cross-section overlapping overlapping welding wire structure, on the section it consists of a metal outer layer 3, a drug powder core 4, an overlapping overlapping part 5, an outer layer connecting There are 6 seams. There is a staggered overlapping overlapping part 5 at the joints on both sides of the "U" shaped metal strip. After being formed by a special roll, it is rounded by a round roll and then drawn into a round welding wire. In the production of welding wire, the strip forming method, according to the conventional process requirements, cuts the cold-rolled coil steel into narrow strips, and the two sides of the rolled "U"-shaped steel strip are staggered before being bent into a circle to make them In the follow-up deformation, lap joints are generated, and a pair of rollers are specially provided for staggered forming. The rollers are provided with different grooves, and the cross-sectional groove-shaped hole 1 of the upper roller and the groove with the same width as the groove are set by the lower roller. Convexity, that is, the cross-sectional shape is composed of 2, as shown in Figure 3. The size of each element in the cross-sectional shape slotting is related to the following factors. The calculation of the value range is shown in the table below: 

serial number Size code value principle Remark 1 B B＝(1.02～1.05)*[(F-C)/π]+δ 2 R R＝(0.95～1.05)*B 3 r r=1/2R 4 h h＝1/2B+(0.18～0.42) 5 no n=(1.1～1.3)*C

The value range of B in the table is B=(1.02-1.05)×[(F-C)/π]+δ In the equation, B: the groove width of the roll is the outer diameter of the welding wire; F: the width of the steel strip; C: lap Chord length of overlapping part; δ: thickness of steel strip; R: radius of upper arc in slot; r: radius of lower arc in slot; h: half of slot width; n: height difference between upper arc and lower arc . Since the cross-sectional shape of the welding wire is circular, it is necessary to add a forming roll with a pressure ring after the staggered edge. As shown in Figure 4, it is also composed of a pair of upper and lower rolls 1 and 2; the groove width B of the forming roll, that is, the outer diameter of the welding wire, is the same as the method for determining the B size above, for example: for a 0.8×12 steel strip, if required The chord length C of the overlapping overlapping part is 1.5mm, then the groove width B of the staggered forming roll and the rounding forming roll should be 4.1mm, because the present invention has increased a pair of staggered forming rolls, made Welding wires with lapped and overlapping structures basically eliminate the joint gap due to the overlapping of the joints, prevent powder leakage, prevent external pollutants, corrosive gases and moisture from entering, and ensure the quality of the flux core of the welding wire. Stability, improving the shelf life of welding wire. The utility model has a simple structure, can be used for forming welding wires of flux cores of various materials and specifications, and has a wide range of applications. the

Claims (2)

1. produce the roller molding device that section overlaps overlapping welding wire for one kind, it is characterized in that, ad hoc have an a pair of misalignment molding roller that is used for, roll is provided with special-shaped groove, promptly is being provided with the misalignment forming tank that is provided with on misalignment moulding slotted eye and bottom roll (2) cross section with topping roll on the cross section of topping roll (1) with wide protruding stupefied composition; Wherein the special-shaped groove of topping roll (1) is special-shaped groove by going up the interior arc radius (r) down of arc radius (R) and groove in roll groove width (B) and the groove and going up the groove that the distance between circular arc and following circular arc has a discrepancy in elevation (n) to constitute.

2. overlap the roller molding device of overlapping welding wire by the production section of claim 1, it is characterized in that: the span unit of roll cross sectional shape fluting is mm; B is that the groove width of roll is the external diameter of welding wire; F is a width of steel band; C is the chord length of overlap joint overlapped part; δ is a thickness of strips; R goes up arc radius in the groove; R is the interior arc radius down of groove; H is half of groove; N be between last circular arc and following circular arc apart from the discrepancy in elevation;

B＝(1.02～1.05)×[(F-C)/π]+δ；

R＝(0.95～1.05)×B；

r＝1/2R；

h＝1/2B+(0.18～0.42)；

n＝(1.1～1.3)×C。

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