RU2162789C2 - Device for oscillating supply of lubricant-coolant - Google Patents

Abstract

FIELD: machine tool manufacture and machining of materials; applicable in supply of lubricant-coolant to grinding zone and to wheel face with axially displaced cutting layer. SUBSTANCE: device has a grinding wheel with axially displaced cutting layer and faces inclined at acute angle α to plane square to rotation axis. Nozzle for supply of lubricant-coolant is attached to body oscillating in axial direction with the help of bearing. The latter is installed on pressing flange neck inclined at angle α. Hinged with nozzle is movable branch pipe coaxially located in fixed branch pipe and enters it to form telescopic system which fulfils function of piston pump. Offered design ensures required positioning of lubricant-coolant flow to oscillating cutting zone with additional injection of lubricant-coolant during each revolution of grinding wheel. EFFECT: higher efficiency. 3 dwg

Description

 The invention relates to machine tools and the processing of materials by cutting, and in particular to devices for supplying a cutting fluid (coolant) to the grinding zone and to the end of the wheel with an axially offset cutting layer.

 A device for supplying a cutting fluid (coolant) to a circle is provided, comprising a rotary nozzle with a nozzle for securing to the circle cover, a spring-loaded lever rigidly connected to the nozzle with a roller at its free end and a flat copier interacting with the roller [1].

 The disadvantage of this device is its ineffective effect when using grinding wheels with an axially offset cutting layer (HK with ARS), i.e., wheels whose ends are inclined at some acute angle to a plane perpendicular to the axis of rotation of the wheel. Because the contact area of the circle and the workpiece also oscillates, the coolant under the influence of the air flow created by the rotating inclined circle like a screw is beaten and discarded, not being able to get into this zone in sufficient quantity. This leads to the appearance of defects in the form of burns and microcracks, to a decrease in the quality of processing and productivity.

 A device is known for supplying coolant to a circle, comprising a rotary nozzle with a nozzle designed for fastening on a circle casing, a spring-loaded lever rigidly connected to the nozzle with a roller at its free end and a flat copier interacting with the roller, the device is further provided with a stationary guide for the copier, intended for fixing the circle casing with a strap and two magnetic couplings, one of which is designed to fix the copier on the guide, and the other copier on the bar [2].

 A disadvantage of the known device is its ineffective effect when using grinding wheels with an axially offset cutting layer (HQ with ARS), which, as you know, are installed obliquely at a certain acute angle to a plane perpendicular to the axis of rotation of the circle. The ends of such circles oscillate and create additional air currents that adversely affect the fluid flow, discarding and repelling the coolant from the oscillating grinding zone. This makes it possible to reduce the processing conditions, contributes to an increase in temperature in the contact zone of the circle and the workpiece, the appearance of defects such as burns, and a decrease in quality and productivity.

 The objective of the invention is to expand technological capabilities and increase the efficiency of cooling and coolant supply directly to the oscillating cutting zone with grinding wheels with an axially offset cutting layer (HQ with ARS) due to the formation of an oscillating frontal coolant flow directed to the longitudinally running grinding zone, and additional coolant injection with each revolution of the circle.

 This is achieved by using the developed device for oscillating supply of cutting fluid (coolant) to the grinding zone with an axially displaced cutting layer (ARS) and ends inclined at an acute angle α to a plane perpendicular to the axis of rotation, containing nozzles with a nozzle, while the nozzle is mounted on an axially oscillating housing on a bearing that is mounted on the neck of the pressure flange inclined at an angle α, in addition, a movable nozzle that is coaxially located is pivotally connected to the nozzle wives in a stationary pipe and enters into it, forming a telescopic system that performs the functions of a piston pump.

 The essence of the device is illustrated by drawings. In FIG. 1 shows a longitudinal section of the device, the nozzle in the far right position; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 shows a longitudinal section of the device, the nozzle in the leftmost position.

 A device for oscillating supply of cutting fluid (coolant) to the grinding zone with an axially offset cutting layer (APC) contains a spindle 1 and a grinding wheel 2 mounted at an acute angle α to a plane perpendicular to the axis of rotation using flanges 3, 4 sec the ends and nuts 5. inclined at an angle α to the plane perpendicular to the axis of rotation 5. A neck 6 with an axis inclined at an angle α to the axis of rotation, on which are installed: a bearing 7 and an oscillating housing 8 connected by means of spring rings 9 and 10. On wasps the nozzle 12 and the telescopic nozzles 13 and 14 are mounted to the oscillating body 8 using the bracket 11 and the nozzle 12 is fixed to the bracket 11 with the possibility of installing and maintaining a constant gap between the nozzle and the end face of the circle, while the length of the nozzle changes as the circle wears (not shown) . The nozzle 13 is connected to the nozzle and mounted in the nozzle 14 movably, and in the stationary nozzle 14 is installed the cuff 15 and the check valve (not shown).

 The use of an oscillating nozzle eliminates the influence of air flow created by a rotating grinding wheel with an axially displaced cutting layer and ends inclined at an acute angle α to a plane perpendicular to the axis of rotation on the coolant flow.

 The device operates as follows.

 The fixed nozzle 14 is installed by one of the known methods of fastening. During operation of the coolant device through the nozzles 14, 13 and the nozzle 12 is supplied with the formation of a frontal oscillating flow into the grinding zone, while the coolant jet moves in the axial direction synchronously with the axial displacement of the cutting zone. In addition, the fluid will not flow out of the nozzle uniformly, but in a pulsating flow.

 Additional coolant injection is carried out by moving the nozzle 12 and the movable nozzle 13 from the left (Fig. 3) to the right (Fig. 1), when the latter enters the stationary nozzle 14, and the shut-off valve (not shown) located in the stationary nozzle is closed.

 Thus, the system of telescopically connected and coaxially arranged nozzles 13 and 14 performs the functions of a piston pump, and at the moment when the circle releases the cutting zone, shifting in the axial direction, it performs cooling with increased efficiency. The frequency of the pulsation of the flow will be equal to the frequency of rotation of the circle, and the pressure of the additional injection depends on the angle α of the inclination of the axis of the neck 6.

 The proposed device for an oscillating supply of cutting fluid (coolant) to the grinding zone with an axially offset cutting layer (ARS) and ends inclined at an acute angle α to a plane perpendicular to the axis of rotation, provides targeted penetration of the coolant, expands technological capabilities and increases processing efficiency.

 The device improves the conditions for the removal of sludge from the cutting zone, reduces the likelihood of burns and microcracks, which increases the productivity of the processing process and provides the ability to increase the wear resistance of grinding wheels.

Sources of information
1 A.S. USSR N 1604584, class B 24 B 55/02, 05.20.88.

 2 A. p. USSR N 1684006, class B 24 B 55/02. Application N 4626626/08, declared. 12/27/88, publ. 10/15/91. Bull. N 38 is a prototype.

Claims (1)

 A device for oscillating supply of cutting fluid to the grinding zone with an axially displaced cutting layer and ends inclined at an acute angle α to a plane perpendicular to the axis of rotation, characterized in that it contains a clamping flange with an inclined angle inclined at an angle α to axis of rotation by a neck in which, through the bearing, an axially oscillating housing is mounted with a nozzle fixed to it, pivotally connected to a movable nozzle coaxially located in the stationary nozzle form a telescopic system, performing the function of a piston pump.

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