RU175079U1 - COOPERATOR WITH COMBINED COOLING - Google Patents

Abstract

Combined cooling cutter is designed for machining difficult to process metals. The cutter contains a hollow holder, in which two heat pipes are located, providing internal cooling of the working element - a replaceable carbide plate through a heat conductor, cooling of the front and rear working surfaces of the working element is provided by directed laminar jets of the SOTS stream from the nozzles in the clamp and nozzle. Combined cooling of the working element in the contact zone will reduce its wear, ensure the required quality of the treated surface, crushing chips into small parts and its evacuation from the cutting zone. 3 ill.

Description

The utility model relates to the processing of metals by cutting, namely, cutting tools with cooling.

When machining difficult-to-treat metals by cutting, due to intense heat generation and significant heating of the contact zone, the tool surface deteriorates and its durability is significantly reduced.

To reduce the wear of the tool, to ensure the required roughness of the machined surface and to increase the productivity of the cutting process, a lubricant-cooling technological tool (COTS) is used. Depending on the conditions of the technological process, the properties of the tool material and the workpieces, the supply of COTS to the treatment zone is carried out in various ways: by a freely falling jet, under pressure through nozzle nozzles, in a sprayed state (in the form of a jet of an air-liquid mixture). In conditions of difficult heat transfer to the external environment, internal cooling of the instrument is used.

A cutter with internal cooling is known, in the case of which a cutting element is fixed and an internal cavity is made, connected to the channels for supplying and removing the cooling agent, a supersonic nozzle is installed in the channel for supplying the cooling agent, the axis of which is perpendicular to the supporting surface of the cutting element, and a vacuum shutter (copyright certificate No. 727329).

The disadvantage of the tool is the complexity of the design, the need for compressed air supply, loud noise during operation of a supersonic nozzle

Known cutter with internal cooling, containing a tube of heat-conducting material, pivotally connected to the inner cavity of the cutter, and partially filled with refrigerant copyright certificate No. 795883).

The disadvantage of the tool is the low heat removal rate, the inability to use on CNC machines

The closest is a metalworking tool with cooling, containing a hollow holder, a working element mounted on it, a heat pipe located in the holder cavity and a heat conductor located between the working element and the heat pipe, made in the form of a split bimetallic elliptical ring, the inner layer of which is made of material with a large linear expansion coefficient (SU patent No. 1426750).

The disadvantage is the need to use large-sized air-cooled radiators for cooling a heat pipe, and the low thermal conductivity of bimetal.

To increase the efficiency of cooling the working element in the contact zone, reducing its wear, ensuring the required quality of the work surface, crushing the chips into small parts and evacuating it from the cutting zone, a cutter with combined cooling is proposed, containing a hollow holder, a working element mounted on it located in the cavity holders heat pipe and heat conductor located between the working element and the heat pipe The cutter is equipped with a second heat pipe located in the cavity of the holder, clamp ohm for fixing the working element, nozzle and nozzle for supplying a cutting fluid to the holder cavity, while the heated ends of the heat pipes are located in grooves made in the said heat conductor having the form of a working element and mounted on the holder, and the end of one thermal the pipe is straight and the other end is semicircular, the ends of the heat pipes cooled by the SOTS are located in the holder cavity, the clamp is mounted on top of the holder and has a channel for supplying the SOTS and a nozzle for directing the laminar stream Cutting fluids flow on the front surface of the operating member is fixed from the bottom nozzle holder and has a channel and a nozzle for directing a laminar flow of cutting fluid jets on the rear working surface of the working member.

Common features with the prototype: the cutter contains a hollow holder, a working element mounted on it, a heat pipe located in the holder cavity and a heat conductor located between the work element and the heat pipe.

New features: the cutter contains two heat pipes, the heated ends of which are made straight and semicircular and located in the grooves of the heat conductor mounted on the holder, having the form of a working element, provide the largest cooling area of the working element, the heat pipes are cooled by the flow of COTS supplied from the machine;

A special nozzle shape for creating and directing the laminar stream of the COTS stream to the front and rear working surfaces of the working element provides intensive heat removal from the contact zone. High-precision nozzles create laminar flows of high-pressure COTS directed to the cutting zone. The accuracy and pressure of these flows provide intensive chip control and stability of the process of turning difficult materials.

In FIG. 1 shows a cutter with combined cooling, top view. In FIG. 2 shows a cutter with combined cooling in section. In FIG. 3 shows the shape of the nozzle 9 and 13 for creating a laminar stream.

The combined cooling cutter contains a holder 1 with a cavity 2, heat pipes 3 and 4, a working element - a replaceable carbide plate 5, a heat conductor 6, a screw 7 for fixing a heat conductor 6, a clamp 8 for fixing a working element - a replaceable carbide plate 5, nozzle 9, a channel 10 for supplying COTS to the front surface of the working element, a screw 11 for securing the clamp 8, an injector 12 with a nozzle 13 and a channel for supplying COTS 14, fixed with a screw 15, a fitting 16 for supplying COTS to the cavity 2 from the supply system of the COTS machine.

The operation of the device.

The cutter is installed on the machine. The fitting 16 is connected to the feed system SOTS machine. They process the workpiece. COTS enters cavity 2 of the incisor, under pressure through channels 12 and 14 into nozzle 9 and 13. Laminar flows of COTS cool the front and rear surfaces of the working element — a replaceable carbide plate. The heated ends of the heat pipes 3 and 4 provide simultaneous heat removal from the inner surface of the replaceable carbide plate.

The use of a cutter with combined cooling will allow cooling the working element in the contact zone, reduce its wear, ensure the required quality of the treated surface, chip crushing into small parts and its evacuation from the cutting zone.

Claims (1)

Combined cooling cutter containing a hollow holder, a working element mounted on it, a heat pipe located in the holder cavity and a heat conductor located between the working element and the heat pipe, characterized in that it is provided with a second heat pipe located in the holder cavity with a clamp for fixing a working element, a nozzle and a fitting for supplying a cutting fluid to the holder cavity, while the heated ends of the heat pipes are located in the grooves made in the said heat to the ovodnik, which has the form of a working element and is mounted on the holder, the end of one heat pipe being straight and the end of the other semicircular, COT ends of the heat pipes are located in the cavity of the holder, the clamp is mounted on top of the holder and has a channel for supplying SOT and a nozzle for guiding the laminar the stream of COTS flow to the front surface of the working element, the nozzle is fixed at the bottom of the holder and has a channel and nozzle for directing the laminar stream of the COTS stream to the rear working surface of the working element.

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