SU1532173A1 - Method of producing articles of ribbed panel type - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used in the manufacture of ribbed panels with single-sided and double-sided fins. The purpose of the invention is to improve the quality and reduce energy consumption in the manufacture of ribbed panels free draft. For this, pre-profiling of the billet is carried out and the subsequent formation of ribs by free precipitation of the obtained semi-finished product. The semifinished product is obtained with a height increasing from the center to the periphery and with a width not less than the distance between the outer edges of the part. The free draft of such a semi-finished product makes it possible to obtain the same height of the ribs, regardless of their distance from the center of the part. 5 il.

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of ribbed panels with single-sided and double-sided fins with a web width not exceeding 200-300 mm.

The purpose of the invention is to improve the quality and reduce energy consumption in the manufacture of ribbed panels free draft.

FIG. Figure 1 shows a blank for making a panel; in fig. 2 - semi-finished product obtained after preliminary precipitation of j in fig. 3 — part obtained after final precipitation of the semifinished product; in fig. 4 — a semi-finished product for obtaining a part with double-sided fins; in fig. 5 - part, with double-sided fins.

The method is carried out as follows. I

Considering the dimensions of the finished part: i. And determine the dimensions of the original blank. The billet is deposited on the lower flat plate with the upper wedge plate to obtain a semi-finished product with a height lower in the middle than its height at the periphery. Then the semi-finished product is deposited on the bottom plate, which has cavities for the flow of metal, with the top continuous plane-parallel plate. At this point, a precipitate occurs in the cavity. The metal spreads to the periphery and flows into the cavities, forming the artificial profile of the part: a flat web and one-sided front ribs. Since the height of the semi-finished product increases from the center to the periphery, this provides

R

about:

h her

a gradual increase in the depth of filling of cavities in the plates when moving from the center to the periphery and obtaining edges of the same height, eliminating the drawbacks inherent in the draft of flat billets.

The dimensions of the semifinished product are selected taking into account the degree of deformation, which ensures the required height of the ribs when the final web height H is reached. The width of the semifinished product is chosen not less than the distance between the extreme edges of the finished part. With a smaller width of the semi-finished product, the designated elevation difference during pre-draft is not achieved. According to the width of the semi-finished product, taking into account the constancy of the volume, the height of the semi-finished product is found, and taking into account the dimensions of the initial billet, the semi-finished product and the finished product, the difference in heights of the central and peripheral parts is determined.

In the manufacture of parts with protrusions on both end surfaces (with double-sided fins), a semi-finished product with a two-sided recess in the center is obtained. The volume of the workpiece is increased by the volume of the second row of ribs, the width of the semi-finished product is taken to be equal to the width of the semi-finished product with one-sided finning, and the height difference doubles.

Example. During the implementation of the procedure, a slab with one-sided ribs was manufactured. The width of the plate is 160 mm, the height of the part blade is H 10 mm, the total height with edges H 1 20 mm, the number of edges 5 pcs. , edge width 4 mm, distance between edges 15 mm, distance of the first edge from edge 40 mm, plate length 100 mm, plate material: aluminum alloy AMg-2. The precipitation was performed on a 630 tf hydraulic press (6.3 MN). From the extruded profile cut off the initial billet mm and a length of 100 mm. During the draft, the metal flow was limited in the direction of the length. Then, the preliminary deformation was carried out with a free draft until a semi-finished product was obtained with the following dimensions in cross section: width 90 mm, height in the center 17 mm, height at the edge 22 mm. After that, the semi-finished product was finally deformed to obtain a flat web with a height of 10 mm and a width of 160 mm and the formation of five edges 4 mm wide and 10 mm high by wicking the metal in the cavity when the semi-finished product precipitated in the form of slotted holes in the bottom plate.

The application of the proposed method allows more efficient use of the precipitation process

cavities by increasing the geometric accuracy of the parts produced.

Claims (1)

Invention Formula The method of obtaining products of type ribbed panels mainly with blade width not exceeding 200300 mm, including preliminary profiling the workpiece and the subsequent formation of ribs by displacing the pre-assembled metal in the direction of application of the load, characterized in that, with the aim of improving the quality of products and reducing energy intensity in the manufacture of ribbed panels with free draft, a prefabricated workpiece produces a semi-finished product of variable cross section with a height increasing from the center to periphery, and with a width not less than the distance between the extreme edges of the product, and the difference in the heights of the peripheral and central parts of the semifinished product is determined from the ratio H, Max -N B. L-. , where H f, is the height of the peripheral part of the semifinished product, H- is the height of the central one. „ TI semi-finished product, BL - the width of the semi-finished product B - width details J HO - the height of the workpiece; H, - the height of the part is full H - the height of the part leaf. ,, fig1 (rig 2 (rigz Fi9. 5