RO116366B1

RO116366B1 - Universal installation for mig/mag welding of exterior corner joints for revolving parts

Info

Publication number: RO116366B1
Application number: RO95-00141A
Authority: RO
Inventors: Marius Nelu Stoica
Original assignee: S.C. "Ventilatorul" S.A. Bucureşti
Priority date: 1995-01-31
Filing date: 1995-01-31
Publication date: 2001-01-30

Abstract

The invention relates to a universal installation for MIG/MAG welding of the exterior corner joints for revolving parts, designed particularly for manufacturing closed or open complex curve-shaped components, for example fan housings. According to the invention, the installation comprises a carriage (A) with a MIG/MAG welding gun which moves on rails (5) in a plane inclined at a certain angle (alpha) and has a linear displacement determined by means of a pick-up unit (2) so that the gun (1) follows the outline of a part (B) to be welded with which it is in permanent contact due to the gravitational force that is also acting on the carriage (A). The installation also comprises a positioning and rotating table (C) provided with a faceplate (6) inclined at the same angle as the plane corresponding to roller tracks (5) and rotating simultaneously with a part to be welded (B).

Description

RO 116366 BRO 116366 B

Invenția se referă la o instalație universală pentru sudarea MIG/MAG, a îmbinărilor de colț exterioare, pentru piese de revoluție, destinată, în special, realizării reperelor care au forma unor curbe complexe, închise sau deschise, cum ar fi, de exemplu, carcasele de ventilator centrifugal.The invention relates to a universal installation for MIG/MAG welding of external corner joints for parts of revolution, intended, in particular, for the production of parts that have the shape of complex, closed or open curves, such as, for example, centrifugal fan housings.

Sunt cunoscute instalații pentru realizarea, prin sudare, a pieselor de revoluție, de tipul carcaselor de ventilații, care au, în componență, un pistol și o rolă palpatoare, pentru deplasarea și menținerea capului de sudură față de suprafața de lucru; fiind prevăzute niște microîntrerupătoare de comandă, viteza de sudare menținându-se constantă, cu ajutorul unui ansamblu mecano-electric de rotire.There are known installations for the production, by welding, of parts of revolution, such as ventilation casings, which consist of a gun and a feeler roller, for moving and maintaining the welding head relative to the work surface; some control microswitches are provided, the welding speed being kept constant, with the help of a mechanical-electrical rotating assembly.

io Dezavantajele acestei instalații sunt generate, în principal, de complexitatea mecanică și cea electronică. De asemenea, multitudinea de repere componente ale d sistemului de poziționare a capetelor de sudare, prin jocuri cumulate, determină abateri / de la rostul de sudare, depășind domeniul de toleranțe în mod normal admise, la sudare, q Problema pe care o rezolvă invenția constă în realizarea unei instalații care să permită poziționarea unui pistol de sudare MIG/MAG în așa fel, încât să realizeze mecanizat o îmbinare de colț, cu urmărirea continuă a rostului, fără utilizarea unor dispozitive consumatoare de energie electrică, pe baza utilizării forței gravitaționale.The disadvantages of this installation are mainly generated by the mechanical and electronic complexity. Also, the multitude of component parts of the welding head positioning system, through cumulative play, determines deviations / from the welding joint, exceeding the range of tolerances normally allowed during welding, q The problem solved by the invention consists in creating an installation that allows the positioning of a MIG/MAG welding gun in such a way as to mechanically produce a corner joint, with continuous tracking of the joint, without the use of devices consuming electrical energy, based on the use of gravitational force.

Problema este rezolvată cu o instalație constituită dintr-un cărucior echipat cu un pistol de sudat MIG/MAG și care se deplasează pe un plan înclinat cu un anumit unghi, 20 pe niște șine, având o deplasare lineară, determinată prin intermediul unei piese de sudat, cu care se află în contact permanent, datorită forței de gravitație care acționează și asupra căruciorului, piesa fiind așezată pe o masă de poziționare și rotire, echipată cu un plan înclinat cu același unghi cu care este înclinat planul corespunzător șinelor de rulare.The problem is solved with an installation consisting of a trolley equipped with a MIG/MAG welding gun and which moves on an inclined plane with a certain angle, 20 on some rails, having a linear movement, determined by means of a piece to be welded, with which it is in permanent contact, due to the force of gravity that also acts on the trolley, the piece being placed on a positioning and rotating table, equipped with an inclined plane with the same angle as the plane corresponding to the running rails.

Instalația conform invenției prezintă următoarele avantaje:The installation according to the invention has the following advantages:

- permite obținerea unor îmbinări sudate, de calitate superioară, într-un timp scurt;- allows obtaining high-quality welded joints in a short time;

- are o construcție simplă, fiind ușor de manevrat și întreținut;- it has a simple construction, being easy to handle and maintain;

- permite reducerea consumului energetic, datorită sistemului de urmărire 30 mecanic, ce nu necesită comenzi de acționare sau surse de energie suplimentare.- allows for reduced energy consumption, thanks to the mechanical tracking system, which does not require drive commands or additional energy sources.

Se dă, în continuare, un exemplu de realizare a invenției în legătură și cu fig. 1 ...5, care reprezintă:An embodiment of the invention is given below in connection with Fig. 1...5, which represent:

- fig. 1, vedere în plan vertical a unei carcase de ventilator centrifugal, care se sudează cu ajutorul instalației conform invenției;- Fig. 1, vertical view of a centrifugal fan housing, which is welded using the installation according to the invention;

- fig.2, vedere de sus, a carcasei din fig. 1;- Fig. 2, top view of the housing of Fig. 1;

- fig.3, vedere în plan vertical, a instalației conform invenției;- fig. 3, vertical plan view of the installation according to the invention;

- fig.4, vedere de sus, a instalației din fig.3;- fig.4, top view of the installation in fig.3;

- fig.5, secțiune parțială, printr-o carcasă de ventilator în timpul sudării.- fig.5, partial section through a fan housing during welding.

Instalația de sudare conform invenției este constituită dintr-un cărucior A echipat 4 0 cu un pistol 1 de sudare MIG/MAG și cu un palpator 2 aflat în contact permanent, cu o piesă B de sudat, care este o carcasă de ventilator centrifugal.The welding installation according to the invention consists of a trolley A equipped 4 0 with a MIG/MAG welding gun 1 and with a probe 2 in permanent contact with a piece B to be welded, which is a centrifugal fan housing.

La realizarea carcasei B de ventilator, sunt necesare patru raze, cu centre diferite, R₁...R₄, pentru a genera spirala arhimedică, aceasta fiind forma corespunzătoare funcționării de principiu a unui ventilator centrifugal. Carcasa B cuprinde 45 doi pereți 3 și o valută 4, fiind puse în evidență îmbinările sudate care trebuie realizate.When making the fan casing B, four radii, with different centers, R ₁ ...R ₄ , are needed to generate the Archimedean spiral, this being the shape corresponding to the principle operation of a centrifugal fan. The casing B comprises 45 two walls 3 and a currency 4, the welded joints that must be made being highlighted.

Claims

RO 116366 B

The trolley A thus equipped moves linearly, during welding, on parallel rails 5, the plane of which is inclined to the horizontal by an angle a. The piece to be welded is placed on a positioning and rotating table C, provided on the upper part with a plate 5 inclined at the same angle as the plane corresponding to the 5o running rails 5 on which the trolley A moves, the plate 6 becoming parallel to the plane of the rails 5. This parallelism is necessary for the gun 1 to follow, with the help of the feeler 2, the welding curve. The tracking system thus designed acts due to the gravitational force. The generation of the welding curve is achieved by the synchronized combination of the rotational movement of the piece B with the linear movement of the trolley A, the synchronization being 55 ensured by the feeler 2 and the gravitational force.

The trolley A is mounted in connection with a welding source 7, by means of cables 8.

After placing the housing B on the plate of the positioning and rotating table C, the gravitational force brings the trolley A closer to the piece B to be welded and the roller of the feeler 1 is fixed 60 on the currency mark 4. At this moment, the welding gun 1 is at the welding site, the feeler rod being sized accordingly. With the help of a mechanism D, technological adjustments are made to the position of the welding gun.

At this point, the installation can weld. The welding source 7 is turned on, the electric arc is ignited and the rotation operation of the plate 6 of the positioning and rotating table C is triggered, which drives the rotation of the workpiece B to be welded. As the radius of the workpiece to be welded changes, in front of the welding torch, the feeler moves the carriage equipped with the gun, linearly, as much as necessary, so that the welding is carried out where it should be. The fact that between the components 3 and 4 of the workpiece to be welded there is an angle of 90° along the entire length of the welding seam, results in that wherever the feeler 7 is positioned, at the vertical of the welding torch 1, it will be able to faithfully follow the shape of the workpiece to be welded, thus eliminating deviations from the weld joint.

At the end of the welding operation, the carriage A is manually removed from the piece to be welded, and it is replaced with another one that will follow the same technological cycle.

75 Claims

1. Universal installation for MIG/MAG welding of external corner joints, for parts of revolution, comprising a welding torch and a feeler, characterized in that it consists of a carriage (A) which supports the torch (1) and the 8 o feeler (2) and which moves on rails whose plane is inclined at a certain angle (a) to the horizontal, having a linear movement, determined by the feeler, for the torch (1) to follow a piece [B] to be welded, with which it is in permanent contact and which is placed on a positioning and rotating table (C).

2. Installation according to claim 1, characterized in that the positioning and rotating table (C) is equipped with a plate (G) inclined at the same angle (a) as the plane corresponding to the running rails.

President of the examination committee: Eng. Anghel Radu

Examiner: Eng. Magdalena Spătaru