RU2469856C2 - Manufacturing method of goods of circular section by winding of band material - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: method involves supply of band material at some angle to the block consisting of at least two drums, with axially moving sectors, continuous formation of a fixed connection of longitudinal edges of band material and shift of finished spiral-joint structure. Besides, during continuous formation of fixed connection of longitudinal edges of band material there changed is interaxial distance of drums as per the calculated speed and supply angle of band material as per formula α=arcsin(b/2πR), where b - width of band material, R - radius of section of the obtained tubular item.

EFFECT: enlarging manufacturing capabilities.

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Description

The invention relates to the production of tubular products by winding from tape material, including reinforced, and can be used for the manufacture of various products of variable diameter, complex configuration, in particular: ventilation pipes and hoses and fittings for them for mine, mine and industrial systems ventilation; in the construction industry - as a formwork of complex shape; during the construction of supports and columns, as well as garbage chutes; in the Ministry of Emergency Situations - for systems of protective booms during the spill of oil products and special lifts during fires in high-rise buildings.

A known method of manufacturing tubular products by winding from tape material, including feeding at an angle of tape material to a block consisting of two drums with axially moving sectors, continuous welding and shear of the finished spiral-suture structure (Copyright certificate 1691131, published November 15, 1991, BI No. 42).

However, the method allows you to make only pipes of the same diameter and does not allow you to make tubular products of complex shape, such as conical and combined.

The technical task of the invention is the expansion of technological capabilities of the method.

The problem is solved in that in the method of manufacturing tubular products by winding from tape material, including feeding at an angle of tape material to a block consisting of at least two drums with axially moving sectors, the continuous formation of an integral connection of the longitudinal edges of the tape material and the shift of the finished spiral-suture design, in addition, in the process of continuous formation of one-piece connection of the longitudinal edges of the tape material change the center distance b arabans according to a pre-calculated speed and feed angle of the tape material according to the formula α = arcsin (b / 2πR),

Where

b is the width of the tape material,

R is the radius of the cross section of the resulting tubular product.

Example 1 according to the invention (on a block of two drums for the manufacture of pipes of small diameters).

The manufacture of a truncated cone with a taper of 1: 5, with a cone height of 0.2125 m with an initial diameter of 0.400 m and a final diameter of 0.315 m (for ventilation systems) from tape material with a width of b = 0.060 m, with an infrared welding speed of Vsv. = 0, 12 m / s The interaxial distance between the axes of the drums in the manufacture of pipes with a diameter of 0.400 m is 0.440 m, and in the manufacture of pipes with a diameter of 0.315 m is 0.306 m, the angle of supply of material in the manufacture of pipes with a diameter of 0.400 m is 2.74 degrees, in the manufacture of pipes with a diameter of 0.315 m is 3, 48 degrees.

The tape material is fed to a block of two rotating sector drums with a diameter of 0.120 m, continuously forming an integral connection of the longitudinal edges of the tape material, for example, by welding with infrared radiation (it was also possible to glue or zig), and periodically the sectors of the drums in contact with the material forming the drums tubular products, provide a shift (descent) of the finished product. At the same time, during the welding process, the distance between the drums is changed at a speed (speed of approach of the drums), which is calculated by the following formula: Vsl. = Δl ∗ Vsv. / L,

where L = 3.98 m is the length of the tape billet going to the manufacture of a truncated cone,

Δl = 0.440-0.306 = 0.134 m - this is the distance by which the center distance between the drums changes during the manufacture of a truncated cone

Vslb = 0.134 * 0.12 / 3.98 = 0.004 m / s;

and change the feed angle of the tape material according to the formula α = arcsin (b / 2πR). In this case, the change in angle from 2.74 degrees to 3.98 degrees is almost proportional.

The resulting product is a truncated cone, a continuous extension to it, for example, you can make a pipe with a diameter of 0.315 m, setting the material feed angle constant 3.98 degrees and fixing the center distance of 0.306 m, thus obtaining a combined product.

Example 2 according to the invention (on a block of three drums for the manufacture of pipes of medium diameters).

The manufacture of a truncated cone with a taper of 1: 8, with a cone height of 0.320 m with an initial diameter of 0.710 m and a final diameter of 0.630 m from tape material with a width of b = 0.130 m, with a welding speed of infrared radiation Vsv. = 0.12 m / s. The interaxial distance between the axes of the drums in the manufacture of pipes with a diameter of 0.710 m is 0.61785 m, and in the manufacture of pipes with a diameter of 0.630 m is 0.53407 m, the angle of supply of material in the manufacture of pipes with a diameter of 0.710 m is 3.34 degrees, in the manufacture of pipes with a diameter of 0.630 m is 3.77 degrees.

The tape material is fed to a block of two rotating sector drums with a diameter of 0.120 m, continuously forming an integral connection of the longitudinal edges of the tape material, for example, by welding with infrared radiation (it was also possible to glue or zig), and periodically the sectors of the drums in contact with the material forming the drums tubular products, provide a shift (descent) of the finished product. At the same time, during the welding process, the distance between the drums is changed at a speed (speed of approach of the drums), which is calculated according to the following formula: Vsl. = Δl ∗ Vs. / L,

where L = 5.18 m is the length of the tape billet going to the manufacture of a truncated cone,

Δl = 0.61785-0.53407 = 0.08378 m - this is the distance by which the center distance between the drums changes in the manufacture of a truncated cone

Vslb = 0.134 * 0.12 / 3.98 = 0.004 m / s;

and change the feed angle of the tape material according to the formula α = arcsin (b / 2πR). In this case, the change in angle from 3.34 degrees to 3.77 degrees is almost proportional.

The resulting product is a truncated cone with a height of 0.320 m with an initial diameter of 0.710 m and an end diameter of 0.630 m, continuous extension to it, for example, you can make a pipe with a diameter of 0.630 m, setting the material feed angle constant 3.77 degrees and fixing the center distance of 0.53407 m between all the drums, thus obtaining a combined product.

Example 3 according to the invention (on a block of six drums for the manufacture of pipes of large diameters).

Production of a truncated cone with a taper of 1: 6, with a cone height of 0.75 m with an initial diameter of 1.00 m and a final diameter of 1.25 m from tape material with a width of b = 0.300 m, with a welding speed of infrared radiation Vsv. = 0.14 m / s The interaxial distance between the axes of the drums in the manufacture of pipes with a diameter of 1.00 m is 0.4503 m, and in the manufacture of pipes with a diameter of 1.25 m is 0.5812 m, the angle of supply of material in the manufacture of pipes with a diameter of 1.00 m is 5.48 degrees , in the manufacture of pipes with a diameter of 1.25 m is 4.87 degrees.

The tape material is fed to a block of six rotating sector drums with a diameter of 0.140 m, continuously forming an integral connection of the longitudinal edges of the tape material, for example, by welding with infrared radiation (it was also possible to glue or zig), and periodically the sectors of the drums in contact with the material forming the drums tubular products, provide a shift (descent) of the finished product. At the same time, during the welding process, the distance between the drums is changed at a speed (speed of approach of the drums), which is calculated by the following formula: Vsl. = Δl ∗ Vsv. / L,

where L = 8.84 m is the length of the tape billet going to the manufacture of a truncated cone,

Δl = 0.5812-0.4503 = 0.1309 m is the distance by which the interaxal distance between adjacent drums changes in the manufacture of a truncated cone

Vslb = 0.1309 * 0.14 / 8.84 = 0.00207 m / s;

and change the feed angle of the tape material according to the formula α = arcsin (b / 2πR). In this case, the change in angle from 5.48 degrees to 4.87 degrees is almost proportional.

The resulting product is a truncated cone with a height of 0.75 m with an initial diameter of 1.00 m and an end diameter of 1.25 m, continuous extension to it, for example, you can make a pipe with a diameter of 1.25 m by setting the feed angle constant 4.87 degrees and fixing the center distance of 0.5812 m between all adjacent drums, thus obtaining a combined product.

Figure 1 is a top view of a device for implementing the proposed method with an indication of the feed angle α of the tape material.

Figure 2 - schematic arrangement of the drums in devices with two, three and six drums indicating the interaxal distance used in the calculations, and the optimal number of sectors.

Claims (1)

A method of manufacturing circular products by winding from tape material, including feeding at an angle of tape material to a block consisting of at least two drums, with axially moving sectors, the continuous formation of an inextricable connection of the longitudinal edges of the tape material and the shear of the finished spiral-suture structure, different the fact that in the process of continuous formation of one-piece connection of the longitudinal edges of the tape material change the center distance of the drums according to a preliminary calculation the given velocity and the feed angle of the tape material according to the formula α = arcsin (b / 2πR), where
b is the width of the tape material,
R is the radius of the cross section of the resulting product.

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