SU1712097A1 - Apparatus for forming welded seam back side - Google Patents

Abstract

The invention relates to welding production and can be used for one-sided automatic butt-welding of parts with the formation of the back side of the seam. The purpose of the invention is the expansion of technological capabilities through welding on a flux cushion and copper lining, as well as expansion: areas of application. In the cradle 1, made in the form of a box, laid pnevorukav 2 and copper lining 3 U-shaped. Between the lining 3 and pneumorukavom 2 there is a gasket 4, and in the lining. 3 - an elastic partition 5 forming a water-cooled cavity 6 with a lining 6. The remaining cavity of the lining 3 is filled with a flux. The lining 3, installed with a cavity of 7 in the direction of the product being welded, forms a flux cushion, and the apex of the U-shaped profile - in the direction of the copper water-cooled lining. The device allows welding of products of various thicknesses with various techniques. 4 illustrations. (ЛСю о ч > & iviqjus. 1

Description

The invention relates to welding production and can be used for one-sided automatic butt-welding of parts with the reverse formation of the root seam section on a copper or flux cushion.

A device for forming the back side of a seam during fusion welding is known, which comprises a fixed base, a duct with an elastic bag for flux and a pneumoscale.

However, this device is characterized by bulkiness and insufficient tightness of the flux pressure due to the free placement of the flexible shell with the flux.

It is also known a device for forming the back side of a seam, comprising a stationary base, a flux box with an elastic partition attached to its walls, dividing it into two sections, one of which is designed to hold the flux, and a pneumoruk for pressing the flux.

This device is also characterized by insufficient reliability of the flux pressing, even at high clamping forces.

The closest in essence and effect achieved to the present invention is a device for forming the back side of the seam, containing a lodgement in the form of a duct with bottom vi side walls, a pneumoruka placed on the bottom of the lodgement and a movable lining with a cavity separated by an elastic partition on the lodgement above the pneumoruka two sections, one of which is designed to hold the flux, and the second is in contact with the pneumatic manual.

A disadvantage of the known device is the limitation of its technological capabilities: it ensures the formation of the root of the seam on only one type of forming device (flux pillow).

It is known that a weld root is formed on a flux cushion only when welding parts of considerable thickness (not less than 6 mm), therefore, the known device cannot be used when welding thin-sheet parts, i.e. its scope is limited.

The aim of the invention is to expand the technological capabilities of the device by welding on a flux cushion and copper lining, as well as expanding the scope of application of the device.

This goal is achieved by the fact that in the device containing a lodgment in the form of a duct, on the bottom of which a pneumo-pipe is laid, and a movable lining with a cavity divided by an elastic partition into two sections, the pneumo-pipe is equipped with a gasket placed between the pneumoruka and

movable gasket, the latter is made of copper U-shaped with the base and side walls, and the lining section formed by its side walls, base and elastic partition, made in the form of a water-cooled channel. Depending on the spatial orientation of the lining, the root of the seam can be formed either on a copper or on a flux lining.

5 Figure 1 shows the device, a cross section: in Figure 2 - the same, the operating position of the lining; on fig.Z - the same, welding on a flux cushion, non-working position: on figure 4 - the same, working position

0 lining.

The device contains a cradle 1, made in the form of a box, on the bottom of which a pneumatic manual 2 is laid, intended to move in a vertical plane.

5 copper lining 3 is U-shaped, which is installed in the cradle 1. A rigid gasket 4, for example, steel, is freely laid on the pneumoscale, for example, providing uniform transfer of force from

0 pneumosuction 2 to the lining 3. The lining 3 is made in the form of a copper bar with an internal cavity divided by an elastic partition 5 into two sections 6 and 7. Section 6, having restrictions on all sides, serves

5 as a coolant channel, and section 7 at its upper location (Fig. 2 serves as a flute channel 8. - In the initial position of the parts in the cradle 1, there is no air in the pneumorukawa 2 and the lining 3 is lowered below the level of the upper end of the side walls of the cradle 1. This helps to prevent possible damage to the forming upper horizontal surface of the lining 3, which

5 ra, as it is known, should be smooth, be; vm ting. The parts are mounted on the bed 1, resting it on the upper ends of its walls. Since the lining 3 is below the level. welded joint, it is not subject to

0 damage The pneumatic manual 2 is then filled with compressed air. At the same time, its force is transmitted through the gasket 4 to the lining 3, which rises, pressing against the joint. Then, in section 6, the cooled fat is fed.

5 bone and start the welding process. The weld root is formed on a copper lining. When the fluid moves along section 6, the elastic partition 5 prc is bent downwards, which increases the volume of the cross section.

6. This leads to more efficient

heat removal from the lining 3 by increasing the volume of coolant.

Welding on a flux cushion is carried out as follows.

The lining 3 is inverted upwards by section 7, having a forming surface on the gasket 4. Section 7 in this case forms a flute chute 8 (Fig. 3a) formed by the ends of the walls of the lining 3 and the elastic partition 5. After the parts are installed on the bed 1, the pneumoruk 2 is filled compressed air. Lining 3 rises and at 1 it comes to the joint. Then in section b serves compressed air or liquid. Elastic partition 5 is bent; 1, the flux 8 is compacted, after which the welding process begins. The formation of the root of the seam is carried out on a flux pad. To convert the copper lining to the flux one, it is enough to turn the lining 3 and fill section 7 with the flux 8. To convert the flux lining to the copper one, it is enough to pour the flux 8 out of the groove and turn the lining 3.

When the pneumosurk 11 is filled with compressed air, lodgement 6 tends to deviate from the horizontal plane. In order to prevent such a deviation from occurring, the cantilever end of the cradle 6 is fixed by the bracket 5, which simultaneously serves as an abutment for placing the cradle parallel to the slit 4 in the slab 3.

The essential difference between the proposed device and the previously known one is that the copper lining 3 can be used either as a flux cushion or as a copper lining, depending on its spatial origination. The possibility of using one bar for two types of forming devices is provided by the presence of an elastic partition 5, which divides the cavity into two sections 6 and 7. At the same time, the section

6 is at the same time both a coolant channel and a channel for supplying air sealing flux 8. Section

7 is a chute for the flux 8 of the copper pad 3. This difference allows changing the type of forming device without significant time and labor costs.

Example. The rack box is welded from 16 mm thick sheet steel. The plate is made of steel sheet thickness of 40-50 mm. The slot in the slab 40 mm wide has a length corresponding to the length of the cradle. The supporting elements are made of cold-rolled channel number 10. The side walls of the cradle are made of steel sheet with a thickness of 14

mm, the bottom - from steel sheet with a thickness of 20 mm. The width (external) of the lodgement is 90 mm, the depth to the bottom is 80 mm. The width of the copper bar is 60 mm, the height is 60 mm. Sampling depth in a bar is 45 mm, width is 40 mm. Coolant channel cross-section 40x15 mm. Elastic bulkhead of technical rubber with a thickness of 1 mm. Trench size for flux: width 40 mm, height 30 mm. A fire pressure hose with a diameter of 70 mm is used as a pneumoscale. Hard strip of steel strip with a thickness of 2 mm.

The technical advantages of the proposed device, compared with the prototype, include the following: the ability to maintain the welding process on a copper or flux cushion due to the design features of the copper base: the possibility of compaction of the flux through the water-cooled lining channel due to the presence of an elastic partition; simplicity of conversion of the device to a new type of seam former: it is enough to turn the lining: ease of maintenance and repair due to the fact that the elements in the lodgment are not fastened together: simplifying the design of the device by combining the functions of individual parts of the lodgement (for example, the copper lining serves both copper and flux lining): ease of manufacture of the device: consists of simple parts and of commonly available materials: the ability to weld thin-walled (on a copper lining) and thick-walled (on-fl yusovoy pillow shell) due to the design features of the forming device.

The economic effect of introducing the invention in comparison with the use of the prototype is obtained by reducing the cost of the device as a result of simplifying its design and combining the functions of its individual elements, by expanding the functionality of the device (you can weld on either a copper lining or a flux cushion) and by expanding the field of application of the device (the range of thickness of parts is increased due to the replaceable forming device).

Formulas a and 30 brethrens and a device for forming the back side of a seam, mainly when welding longitudinal welds of shells, containing a lodgment in the frame of the seam with a bottom and side walls, laid on the bottom of the lodgement pneumoruk and placed in the lodgment above the pneumoruk movable

the lining with a cavity divided by an elastic partition. On two sections, one of which is designed to hold the flux, characterized in that, in order to expand technological capabilities by performing welding on a flux cushion and copper lining, as well as expanding the field of application, the pneumorukav is equipped with a rigid the gasket placed between the pneumoscale and the movable lining, the lining is made of U-shaped copper.

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Claims (1)

Claim A device for forming the reverse side of the seam, mainly when welding longitudinal seams of shells, containing a lodgement in the form of a box with a bottom and side walls, a pneumatic sleeve laid on the bottom of the lodgement and movable in the lodgement above the pneumatic sleeve Ί a lining with a cavity divided by an elastic partition into two sections, one of which is designed to hold flux, characterized in that, in order to expand technological capabilities by performing welding on a flux pad and a copper lining, as well as expand the scope, the pneumatic sleeve is equipped with a rigid a gasket located between the pneumatic hose and the movable 5 lining, the lining is made of U-shaped copper. figure 2. figs figa zo ί fifty •4 Compiled by V. Kalyuzhny Editor M. Tsitkina Tehred M. Morgenthal Corrector N. Revskaya Order 495 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.