摘要:
Can bodies (1) rounded around an arm (16) are taken over by endless conveying tracks (30;50). These are each guided over guide devices (32;52) and a drive wheel (33;53) and each comprise a run parallel to the arm (16) in order to convey the can bodies (1) along the arm (16) in the direction of a welding station (70). The guide devices (32;52) are mounted on track carriers (26;46) and form, together with these and the associated conveying track (30;50), units adapted to the length of the can bodies and interchangeable as a whole. These units are each secured to a sliding carriage (22;42) which is adjustable at least substantially radially to the arm (16). Track carriers (26;46) provided for different ranges of can length can be exchanged for one another with a few movements of the hand and each track carrier (26;46) can be adjusted by the associated sliding carriage (22;42) in such a manner that its arrangement is adapted in an optimum manner to can bodies (1) of any desired diameter within the working range of the machine.
摘要:
It is necessary to determine welding temperature as precisely as possible in order to properly control the high-frequency welding of longitudinal pipes. Changes in welding temperature are proportional to alterations in the welding current that flows through the edges of the skelp. Magnetic-field sensors can be used to directly and precisely determine alterations in the current and hence changes in the temperature. Voltages induced in the sensors can be processed into setting signals to correct the high-frequency welding generator and disruptions in the current used to generate signals to mark the site of failure on the pipe for subsequent rejection.
摘要:
In a method for electrical resistance roll seam welding with a single electrode-wire, wherein the electrode-wire runs over first and second electrode carrier-rolls urged against each other, and the strength of the electrode-wire is increased by rolling-out before it enters the first electrode carrier-roll, elongations of the electrode-wire which can otherwise arise and lead to a slippage of the electrode-wire at the welding point and therefore, deleteriously affect the weld-quality can be largely prevented by reducing the electrode-wire temperature at the welding-point by cooling with a cooling device (17) the electrode-wire (12) between its rolling-out point (17/18) and its passage onto the first electrode carrier-roll (14) and/or between its departure from electrode carrier-roll (14) and its passage onto the second electrode carrier-roll (15).
摘要:
A double-wall structural vessel includes an inner tubular liner and an outer tubular shell surrounding the liner in spaced relation, both the liner and the shell comprising helically curved strips of material, and a continuous and helically curved spacer/stiffener therebetween. The liner and shell are relatively shifted axially such that the shell edges are out of alignment with the liner edges, and the spacer spans contiguous edges at successive turns of the liner as well as at successive turns of the shell, and is secured to the strips as well as to the liner edges and to the shell edges.
摘要:
In an apparatus and a method of at least partially suppressing oxidation of can components or the like during resistance roller welding with the aid of an inert gas, the steps include welding the can components to one another, so as to obtain a hot welding seam, supplying the inert gas to the hot welding seam so as to envelop it at least partially, and to create a region of the inert gas in contact with the surrounding atmosphere, so that oxidation of the hot welding seam is at least partially suppressed.
摘要:
A vacuum or high pressure seal operative at high temperatures is formed by placing a thin metal foil over an opening, and forming an electrical seam weld at the interface of the surface and the foil by guiding a needle-like electrode along a path around the opening at a substantially constant rate, with substantially constant pressure being applied to the electrode as it is moved along the path. When supported, the seal is capable of withstanding high pressures, say ten atmospheres, at high temperatures, say 500.degree. C.
摘要:
Disclosed is a process for the preparation of welded cans, which comprises forming a blank comprised of a surface-treated steel plate into a cylinder and passing a lap portion of the formed cylinder between a pair of electrode rollers through an electrode wire to effect electric resistance welding, wherein said surface-treated steel plate comprises a layer of metallic tin or a tin-iron alloy formed on the steel plate substrate in an amount of 0.05 to 1.0 g/m.sup.2 as calculated as metallic tin and a hydrated chromium oxide layer formed on said tin layer in an amount of 0.005 to 0.05 g/m.sup.2 as calculated as metallic chromium and electric resistance welding is carried out in an inert atmosphere in the state where an electrode wire having a plating layer of tin or a tin alloy having a thickness of 0.1 to 20 .mu.m is kept in close contact with the surface of said surface-treated steel plate.In the inner and outer surface portions of the side seam of a welded can prepared according to this process, the thickness of the oxide layer is controlled below 400 .ANG. and the amount of tin in these inner and outer surface portions is at least 60% of the amount of tin in the starting surface-treated steel plate, and this welded can is excellent in the corrosion resistance, lacquer adhesion and appearance characteristics of the seam.
摘要翻译:公开了一种用于制备焊接罐的方法,其包括将由表面处理的钢板组成的坯料成形为圆柱体,并将成形的圆筒的搭接部分通过电极线通过一对电极辊之间以实现电阻 焊接,其中所述表面处理钢板包括金属锡或锡 - 铁合金层,其形成在钢板基材上,其量为0.05-1.0g / m 2,以金属锡计算,并且水合氧化铬层形成在 所述锡层以金属铬计算为0.005〜0.05g / m 2,并且在惰性气氛中进行电阻焊接,其中在具有锡或锡合金镀层的电极线的厚度为 0.1〜20μm与表面处理钢板的表面保持紧密接触。 在根据该方法制备的焊接罐的侧接缝的内表面和外表面部分中,氧化物层的厚度控制在400以下,并且这些内表面部分和外表面部分中的锡的量至少为 起始表面处理钢板中的锡量,该焊接罐的接缝的耐腐蚀性,漆附着性和外观特性优异。
摘要:
A transport installation and method of transporting can bodies for a fully automated resistance welding machine comprising a roll former station for rolling the bodies, two successively arranged driven transport systems, and a pair of welding electrodes. The transport systems comprise endless, revolving chains equipped with fixed catches or cams and defining first and second chains. The first chain passes through the roll former station where, during rolling of the blanks into the can bodies, it cyclically and periodically remains at least approximately stationary, whereas the second chain has a sinusoidal velocity course. The can bodies exposed to the intermittent non-continuous mode of operation of the first chain, necessitated by the roll forming operation, are transferred to the second chain and experience a movement which is stabilizing for the can bodies.
摘要:
An improvement in a method for producing a welded metallic can body. The method involves holding and pressing a lap portion of the side marginal portions of a can body-like structure, which has been formed by bending a metal blank into a cylindrical shape, along its entire length between a pair of opposing parallel wire electrodes placed on the opposing surfaces of parallel electrodes, and passing an electric current across the parallel electrodes for a predetermined period of time during the pressing to subject the lap portion to resistance welding. At least one of the parallel electrodes is divided longitudinally into two or more portions electrically insulated from each other, and an electric current is passed through at least one of them independently from the other portions so that the temperature rise in the lap portion of the can body-like structure becomes uniform. Also disclosed is an apparatus for producing a welded metallic can body in accordance with the aforesaid method.