RU2177848C2 - Shape production method - Google Patents

Abstract

FIELD: manufacture of elongated products by extrusion. SUBSTANCE: method comprises steps of extruding billet from container through die, guiding shape between adjusted rollers of stands, clamping and transporting shape by means of drawing apparatus along table of press; trimming shape, transferring it crosswise onto axle of stretching machine, stretching it, feeding it crosswise on roller table of cutting line, cutting shape by measured length values, straightening cross curvature of shape fed on table of press by realizing correction deformation of shape between adjusted rollers of stands mounted on table of press. Rollers are adjusted in horizontal and(or) in vertical planes simultaneously with process for extruding billet. EFFECT: possibility for realizing correction deformation of shape in horizontal and(or) vertical planes simultaneously with extrusion process. 14 dwg

Description

 The invention relates to the processing of metals by pressure, namely the manufacture of long products by pressing.

 There is a known method of producing profiles by pressing, including extruding the workpiece from the container through the matrix, gripping and tracking the profile with a pulling device along the table (output part) of the press, trimming the profile with guillotine shears on the press table, lateral transfer of the cut profile to the axis of the stretching machine, stretching the profile correctly to a stretching machine, transverse profile transfer to the rolling table of the cutting line, cutting profiles to a measured length with laying them in special baskets, transfer of special baskets with profiles to the section equal transverse curvature, straightening the transverse curvature of the profiles on roller straightening machines (Skoblov L.S. Technology for the production of extruded profiles for building structures in Japanese plants (Light alloy technology, N 1, 1972, pp. 99-103) - prototype.

 This method has the following disadvantages.

 1. The presence on the profiles of unacceptable transverse curvature formed during the pressing process.

 2. Elimination of unacceptable transverse curvature of the profiles is carried out on special roller straightening machines.

 3. Due to the presence of unacceptable transverse curvature on the profiles, it is impossible to achieve maximum flow rates during their pressing.

 4. Low removal of profiles from the matrix due to the large number of improvements and naturally high consumption of high alloy tool steel.

 5. A large number of improvements of the pressing tool to eliminate lateral curvature leads to an increase in time to obtain a suitable product, as well as an increase in material, energy and labor costs.

 6. The need to attract a highly qualified toolmaker for fine-tuning the tool.

 The problem to which the invention is directed, is to increase the productivity of the press complex while ensuring high quality extruded profiles.

 The technical result achieved by the method is correcting deformation of the profile in the horizontal and / or vertical planes directly in the process of pressing immediately after extrusion.

 The specified technical result is achieved by the fact that in the method of extruding profiles, including extruding the workpiece from the container through the die, gripping and tracking the profile with a pulling device along the press table, trimming the profile on the table with guillotine shears, transverse transfer of the cut profile to the axis of the stretching machine, profile stretching, transverse transferring the profile to the rolling table of the cutting line and cutting it to a measured length and straightening the transverse curvature of the profile, in accordance with the invention, the transverse curvature of the profile is corrected when the profile exits to the press table by correcting deformation of the profile between the adjustable rolls of the stands installed on the press table, the rollers are adjusted in horizontal and / or vertical planes simultaneously with the process of extruding the workpiece.

 When the profile passes through the adjusted rollers in the stands, the profile is deformed and, accordingly, the profile is obtained with the permissible transverse curvature at the optimal maximum flow rates, thereby excluding subsequent editing of the profile curvature on roller straightening machines.

 The adjustment of the rollers of the stands is carried out depending on the type and size of the transverse curvature, without stopping the process of pressing (extrusion), until the unacceptable transverse curvature is eliminated.

 The deformation of the profile due to the adjustment of the rollers is carried out either by editing by pressing, or by editing by bending, or by combined editing.

 By applying force to the deformable surface of the profile through the roller in the direction to the axis of pressing, the dressing is made by compression. In this case, the axis of pressing maintains its rectilinear direction, and one or more stands are involved in the work.

 By applying force to one of the profile surfaces in the first stand, then to the opposite surface in the second stand, then to the first surface in the third stand, and so on, depending on the number of stands, straightening is performed by bending. Bending is carried out, if necessary, in a group of stands in a vertical plane and in a group of stands in a horizontal plane. In this case, the profile axis has a deviation from the pressing axis in the horizontal and / or vertical plane.

 Combining the above options produce combined editing.

 In the process of pressing profiles from one to several stands can participate.

 The invention is illustrated by drawings, where in FIG. 1 schematically shows the extrusion and passage of a profile through adjustable rollers, the rollers are in the initial position; in FIG. 2 shows the axis of pressing during straightening by kink (depending on the position of the straightening rolls), side view; in FIG. 3 - same, top view; in FIG. 4-10 show various types of transverse curvature of the profiles; in FIG. 11 shows a section aa in FIG. 1 (editing by kink and / or preload); in FIG. 12 is a section BB in FIG. 1 (editing by kink and / or preload); in FIG. 13 is a section BB in FIG. 1 (editing by bending and / or preloading) in the case when the profile has a different width of opposite walls; in FIG. 14 is a section BB in FIG. 1 (edit by preload).

 The method is as follows.

 The workpiece is squeezed out of the container 1 through the matrix 2 and, when the profile 3 is withdrawn, the profile is sent to the press table between the rollers 4 of the stand 5. The profile is gripped and trailed by a pulling device along the press table (advantageous part) and, without stopping the extrusion process, the rollers are adjusted by the stands in horizontal (arrows 7) and / or vertical (arrows 8) planes relative to the pressing axis 9, until the unacceptable transverse curvature is eliminated, the profile is cut with guillotine shears 10 on the press table, ayut right axle-stretching machine, is carried out on the correct-stretching tenter, and produce cutting profiles to length with stacking them in spetskorziny. And further, in contrast to the known method, profiles having a transverse curvature within acceptable values do not transfer to the straightening section of the transverse curvature, but to the finished goods warehouse.

 One or several stands can participate in the work.

 The claimed method eliminates the transverse curvature of a different kind: deflection 11 (Fig. 4,5,6), bulge 12 (Fig. 6,7,9), concavity 13 (Fig. 8), waviness 14 (Fig. 10).

 The claimed method allows the following.

 1. To carry out the manufacture of profiles at the optimum maximum flow rates, while ensuring requirements for surface quality, geometric dimensions and transverse curvature.

 2. To exclude the operation of editing the transverse curvature on roller straightening machines.

 3. To reduce costs and time for the completion of the pressing tool.

 4. To exclude the technological operation of finalizing the pressing tool by a highly qualified fitter, with the possibility of eliminating transverse curvature during the pressing process.

 5. Reduce the frequency and accuracy of the alignment of the pressing tool.

 6. Reduce metal consumption per ton of good products.

 7. To increase the productivity of the press complex.

Claims (1)

 A method of manufacturing profiles, including extruding a workpiece from a container through a die, gripping and supporting the profile with a pulling device along the press table, trimming the profile with guillotine shears on the table, transversely transferring the cut profile to the axis of the stretching machine, stretching the profile, transversely transferring the profile to the roller conveyor of the cutting line, cutting it to the measured length and editing the transverse curvature of the profile, characterized in that the editing of the transverse curvature of the profile is carried out when the profile exits onto the press table by Editin deformation profile between adjustable rollers of stands installed on the press table, wherein the adjustment of the rollers in a horizontal and / or vertical plane simultaneously with the extrusion of the preform.

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