SU1325778A1 - Method of processing channels - Google Patents

Description

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The invention relates to the technology of mechanical engineering, in particular, to the machining of parts on computer-controlled machine tools, and is intended for use in milling planes bounded by two or more sides of the contour surface, interfaced to the machined plane, for example, to obtain interscapular channels in one piece billet impellers for throwers with alternating wide and narrow blades located between the periphery and the hub of the worker - gr wheels.

 The purpose of the invention is to increase productivity,

FIG., Shows a supercharger impeller, general view; Fig. 2 is the same, section A-A is nafig; Fig. 3 is a circuit for forming channels from the periphery and the wheel hub; FIG. 4 is a jumper removal circuit;

Example: From the solid billet, the metalclopathic channels of the impeller of the supercharger are obtained (Fig. With alternating wide I and narrow 2 face blades located between the periphery 3 and the hub 4 of the impeller, made in one piece with the disk 5, the plane Trace represents the bottom of the 6 channels , - lines 7 - the contours of the profiled surfaces of the trough and the back of the blades, b the bounding channels Preliminary shaping of a given contour of the interscapular canals and the bottom of the canals located in the same plane for all channels When performing the first operation, the task is to choose as much material as possible in the channels between the blades. To do this, take a mill of a large diameter not less than half the maximum width of the channels and the length, right, the height of the blades. the sides of the periphery 3 of the workpiece by plunging into the last to the whole depth, taking into account the allowance for finishing on the bottom of the b channels and the message of the displacement cutter equidistantly limiting the first channel to the profile surfaces 7, y in the direction of the hub 4 of the product is produced, - up to the moment of maximum approximation to the narrow

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place interscapular channel. In the process of making the first pass in the first channel, the tool center is moved from the zero point of processing (see, FIG. 3) according to the following scheme:

Points ОI - accelerated movement to the periphery of the product;

points l – 2 — accelerated movement of the tool to the depth of processing, taking into account the allowance along the bottom for finishing;

points 2 -3-4-z - processing the contour surfaces of the channel; 5 points 5 -6 - accelerated movement to the next channel.

Similarly process, sequentially each scapular channel,

20 Then, the tool is deepened by the amount of allowance left to finish the channel bottom, and the tool paths are repeated in accordance with previously performed transitions, after which parts of each pair of adjacent channels are sequentially executed with the same cutter, moving the tool according to the following scheme: -JQ points Ol - accelerated movement to the hub;

points - the accelerated movement of the tool to the depth of processing, taking into account the allowance - at the bottom for finishing;

Sc

 II n II. II g I- / - II -1 I

points 2 -3 -h -5 -b - / - processing40

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ka contour surfaces of the channels.

Similarly, each vapour of adjacent interscapular canals is treated. According to the same scheme, the pretreated parts of the bottom of the channels are finished from the side of the shoulder.

On the second operation after antecedent. Forming the parts of the m channel channels from the periphery and the wheel hub, the channels are cut through by a cutter with a diameter smaller than the number of channels in the tapered part, removing the Chm of the remaining parts between the obtained parts before forming a trough and two ST1INKI adjacent wide shoulder blades, and then the trough and back of the narrow shoulder blade. At the same time, the tool is moved along the following trajectory (FIG. - 4);

points 0-1. - accelerated movement to the zone of the interstitial canal.

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processed on the previous operation from the periphery side (see Fig. 3); points l -2 - movement of the tool to the depth of processing, taking into account the Bottom allowance for finishing;

points - processing the contour surfaces of the channels;

points - tool output from the channel;

points — accelerated motion to process the next pair of channels. Then, in the same way, the channel bottom is finished.

The disc itself is most likely obtained from a blade with blades, where the blades, along the entire contour, have a uniform allowance for finishing, and the bottom of the interscapular canals are made in drawing size.

The considered operations of obtaining interfacial channels from the whole

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Cooking is carried out in practice on machine tools with programmed control. Taking into account the size of the workpiece and the ability to move the organs of the machine, it is not always possible to perform the above operations for one installation of the product. Therefore, before processing, it is recommended to determine the maximum number of blades that are a multiple of the total number of blades, which can be processed with one installation in the device. The multiplicity of the blades, their total number determines the number of turns of the product to perform a single operation. In accordance with the multiplicity, a reversal matrix is drawn up for each new arrangement of blades on. product.

The described method allows to increase the production and reduce the labor intensity in the manufacture of impellers for injection pumps.

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Compiled by M. Kolbich Editor T, Kurkova Tekhred l.SerdyukovzKorrektor l. Pilipenko

Order 2489. Draw 678 Subscription

VNISh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

METHOD OF PROCESSING CHANNELS, limited by the contour surfaces of the trough and back of the blades located between the periphery and the hub of the impeller of the supercharger, in which the processing is carried out in several passes with a mill that moves along a path that is equidistant to the sides of the contour surfaces, which differs from that, with a chain for increasing productivity, each channel is processed in parts, moving a phase whose diameter is chosen at least half the maximum channel width, first from the periphery of the wheel to the hub, and beyond from the hub to the periphery, leaving a jumper between the parts, which is then removed with a mill, the diameter of which is selected from the condition of its passage in the narrow part of the groove, and at the same time, the contour surfaces of the trough and back of the blades are formed, § z S? ω cz b сл m • ^ 1 I 325778