RU2236320C1 - Apparatus for making elongated sections - Google Patents

Abstract

FIELD: plastic metal working, possibly manufacture of elongated tubular shells of sheet material.

SUBSTANCE: apparatus includes housing, table, power cylinders, slide, shaping unit, control system. Housing has sections, in each section power cylinder is mounted. Section of housing are placed uniformly along table, and they are mutually joined in such a way that spacing between sections exceeds their front dimension. Shaping unit includes punch and die. Punch is mounted on slide and it has cross section constant along its length. Die has linear members movable along width of table and it is provided with return power cylinders. Control system may provide any combination of working power cylinders.

EFFECT: enhanced quality of articles, enlarged manufacturing possibilities, possibility for making elongated sections with predetermined diameter in the form cylinders, truncated cones, truncated pyramids, enlarged using range of products due to manufacture of thick-wall and composite metallic articles.

4 cl, 1 dwg

Description

The invention relates to the field of metal processing and can be used for the manufacture of long tubular shells from a sheet.

Known roll bending machine for convolving long tubular shells from a sheet, containing a beam fixed on the bed with supports, on which the work roll is located, and an automatic shutdown unit for rotating the work roll with contact track switches (SU 1215791 A, B 21 D 5/06, 03/07/1966).

A feature of bending (convolution from a sheet) of long tubular shells in machines having a work roll resting on rollers, whose axes are mounted on supports mounted on a fixed traverse, is that at the end of the bending, the edges of the shell fit snugly against the surface of the supports. When pulling the shell from the supports sideways, sharp edges and especially the corners of the shell cut into the surface of the supports, leaving deep grooves on their surface. The pressure of the edges of the shell on the surface of the supports is so great that it leads to warping and jamming it during removal. In order to remove the shell from the machine, it is necessary to bend the edges manually, which leads to loss of time and low productivity.

A known installation for convolution of tubular parts and shells, in which the workpiece is laid on the table, sequentially bend (bend) the workpiece relative to the bending element using a matrix or rolls, for example, a roll with an elastic coating, as the workpiece leaves the zone, the part of the part is deformed by applying force the inner side of the workpiece and the convolution is carried out before touching the beam, the workpiece is reinstalled, deployed and laid on the table with the other edge to the bending elements and convolution of the second half with the same techniques (patent of the Russian Federation No. 913644, IPC B 21 D 5/14, 1996).

The disadvantage of this installation is the low productivity and the ability to manufacture only thin-walled parts.

A device is known for forming a sheet blank for the manufacture of welded thin-walled pipes, containing a removable forming mandrel with a cylindrical surface, mounted movably with a movable element with a drive and a clamp, in which the movable element is made in the form of two pressure rollers, each of which is mounted for rotation around its own axis, sliding along the cylindrical surface of the forming mandrel and moving in the direction of the radius of the forming mandrel (patent of Russian F eration №2144443, IPC B 21 D 5/10, 2000 YG).

This analogue, like the previous one, is designed for manual labor and the manufacture of thin-walled products.

The closest device for the manufacture of lengthy profiles contains a bed, table, power cylinders, slider, forming unit and control system.

A rolled-up device with its edges enters into the grooves of the upper element of the forming unit and is removed by this element for further transportation under welding (patent of the Russian Federation No. 2152836, IPC B 21 D 5/10, 2000, prototype).

The disadvantage of the prototype is the possibility of manufacturing products only of circular cross section, the limited dimensions of the workpieces and, accordingly, products, the ability to manufacture only thin-walled products.

This invention eliminates the disadvantages of analogues and prototype.

An object of the invention is to improve the quality of manufactured products and expand technological capabilities, namely, uniform bending of the product at a given angle and a given arrow of deflection, the ability to manufacture long profiles of a given diameter in the form of cylinders, truncated cones, a truncated pyramid, expanding the scope of products (bearing supports, lighting poles, etc.), the possibility of manufacturing thick-walled and composite metal products.

The technical problem is achieved by the fact that in the device for the manufacture of long profiles containing a bed, a table, power cylinders, a slider, a forming unit, a control system, the bed is made sectional, each section has power cylinders, the bed sections are evenly spaced along the table, the distance between the sections exceeds their size along the front, the sections are fastened together by a table and additional ties, the longitudinal size of the slider and the table exceeds the distance between the extreme sections of the bed, forming th node configured as a punch and die, the punch is located on the slider and formed with constant along the length of the cross section, and the matrix is provided with movable width section line elements and provided with a return power cylinders, the control system is arranged to activate the actuators in any combination. The device is equipped with a puller. The puller is located on the slider with the ability to move along the slider. At one end of the matrix are limit stops.

A device for the manufacture of long profiles is schematically shown in the drawing, where 1 is the table, 2 are the bed sections, 3 are the power cylinders, 4 is the slider, 5 is the punch, 6 are the linear linear elements of the matrix, 7 is the sheet blank formed into the long profile, 8 - control system.

The arrows indicate the possible directions of movement of the section 2 and the slider 4. The long profile 7 is removed in a plane perpendicular to the drawing; the puller itself is not shown in the drawing.

A device for the manufacture of long profiles works as follows. The sheet blank 1 is pre-marked on the alleged bending lines and placed on the movable linear elements of the matrix 6 located on the table 1. Sectioned beds 2 using the power cylinders 3 set the required base gap between the linear elements of the matrix 6. Then, using the slide 4, lower the punch 5 on sheet blank 7 along the marking and deform it to the deflection value specified by the control system. The sheet blank 7 is moved across the linear elements of the matrix 6 and its deflection is deformed by the same marking symmetrically located on the sheet blank 7. Similarly, the workpiece 7 is deformed using the control system 8, moving the slider 4 along the rest of the symmetrically located marking lines. If necessary, set the basic distance between the movable linear elements of the matrix 6 using power cylinders 3 located on the sections 2. Return cylinders (not shown) allow you to move the linear elements of the matrix 6 in the opposite direction. The last bend of the sheet stock 7 is performed along the center line of symmetry of the sheet stock 7, lowering the punch 5 with the slider 4 at the command of the control system 8.

As a result of the final deformation, the edges of the sheet billet 7 are closed above the punch 5, touching the slider 4. To obtain a variable bending angle along the length of the profile, the matrix is configured to control the distance between the movable linear elements 6.

For normal operation of the device, it is necessary that the ratio of the vertical stiffness of the slider 4 to the vertical stiffness of the table 1 be greater than one, and the ratio of the horizontal stiffness of the slider 4 to the horizontal stiffness of the table 1 would be less than one.

At the command of the control system 8, a punch 5 is lifted using the slider 4, the upper edges of which raise the formed lengthy profile. Then, the formed profile with the help of a puller is moved along the slider 4 along the upper edges of the punch 5 and removed from the working area of the device. The next workpiece is sent to table 1.

By adjusting the deformation step and the depth of deflection of the sheet blank 7, long sections (cylinder, cone, pyramid) of various cross sections are obtained. In particular, with sequential bending of the ribs with calibration, predominantly octagonal cross-sectional and trapezoidal in longitudinal sections products are made from flat trapezoidal blanks with pre-marked marks on them.

Products can be obtained of a given standard size by changing the transverse dimensions of the punch 5. The condition for universality is to fulfill a simple relation: the diameter of the circumscribed circle of the cross section of the punch 5 is less than the diameter of the inscribed circle of the smallest cross section of the profile.

The device allows you to produce profiles with a length exceeding the length of the table 1, by subsequent connection between themselves. To do this, at one end of the matrix there are limit stops.

Claims (4)

1. A device for the manufacture of long profiles containing a bed, a table, power cylinders, a slider, a forming unit, a control system, characterized in that the bed is made sectional, in each section there are power cylinders, the bed sections are evenly spaced along the table and fastened together, the distance between the sections exceeds their size along the front, the forming unit is made in the form of a punch and a matrix, the punch is located on a slider and is made with a constant cross-section along the length, and the matrix is made with movable linear elements across the table and equipped with returnable power cylinders, the control system is configured to include power cylinders in any combination. 2. The device according to claim 1, characterized in that it is equipped with a puller. 3. The device according to claim 2, characterized in that the puller is located on a slider with the ability to move along the slider. 4. The device according to any one of claims 1 to 3, characterized in that at one end of the matrix there are limit stops.