SU1512754A1 - Arrangement for rounding off the edges of vane tailpiece - Google Patents

Abstract

The invention relates to the processing of curved surfaces. The purpose of the invention is to improve the quality of rounding edges. The device includes a base 1 with a tailstock 5, a movable longitudinal caliper 2 with a main rocking chair 12, on which an intermediate rocking chair 21 is mounted coaxially with the swing axis, carrying an adapter 27 with a shoulder blade 28, mounted on an axis displaced from the swing axis, with the possibility of rotation around it , and two cylindrical rods 30, whose longitudinal axes are parallel to the swing axis. Along the longitudinal axis, the slider 31 moves with two two-arm self-centering levers 32, operating from the spring-loaded wedge 34 and in contact with the blade blade in the area of the junction points of the edge rounding radius with the feather profile. In this case, the blade is secured by a lock so that the centers of rounding radii lie on the swing axis or are as close as possible to it in the case of a volume-curved edge shape. The slider 31 is in constant engagement with a stationary ring stop 35. In the case of the main rocking unit 12, a spring-loaded pin 23 is mounted, one end of which rests firmly on the stationary ring abutment 25, and the other interacts with the copier 22 to turn the blade on the intermediate pumper 21. Move the wedge 34 kinematically through the self-locking lever 36, the distributor 37, the hydraulic motor 38 is connected with the vertical movement of the grinding head 7 with a circle 8 mounted on the vertical support 6 of the back headstock 5. Swing movement atki variable amplitude is effected by a motor 13 through a crank gear 14, connecting link 15, a gear pair 16 and the cam 18 fixedly mounted on the base. The reciprocating movement of the longitudinal slide 2 with the blade is carried out from the reverse engine 3 through a gearbox with a screw pair 4. The kinematic scheme allows automatic correction of the blade position relative to the cutting tool during the edge processing, depending on the actual oscillations of all the geometric parameters of the blade tip, affecting the quality of the rounding edge. 2 hp ff, 2 ill.

Description

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21. The movement of the wedge 34 kinematically through the self-locking lever rych.chag 36, valve 37, the hydraulic motor 38 is connected with the vertical movement of the grinding head 7 with a circle 8 mounted on the vertical support 6 of the tailstock 5. The swinging of the blade with variable amplitude is carried out from engine 13 through 14 with crank, rocker 15, gear pair 16 and copier 18 fixedly mounted on the base. Returnable movement of the longitudinal caliper 2 with the blade is carried out from the reversing motor

3 through a gearbox with a screw pair 4. The kinematic circuit allows automatic correction of the blade position relative to the cutting blade. tool in process

Edges, depending on the actual oscillations of all geometrical parameters of the blade feather, affecting the quality of the rounding of the edge, 2 s. f-ly, 2 ill.

The invention relates to grinding devices and can be used primarily in the processing of the blades of gas turbine engines.

The purpose of the invention is to improve the quality of processing.

Figure 1 is a schematic diagram of the device, figure 2 - view A on. 1

The device contains a fixed base 1, carrying on itself a longitudinal caliper 2, making a reciprocating movement from the reversing motor 3 through a gearbox and screw pair 4, a tailstock 5 on which a vertical caliper 6 is mounted with a grinding head 7 and abrasive circle 8, the adjustment of which is carried out by screw 9 On the longitudinal caliper 2 is placed the headstock 10, carrying on the spindle 11 the main rocking chair 12, performing a swing movement around the axis 0-0 from the engine J through the gear 14 to the slide 15 and gears a pair of 16 mounted on a hinged support 17, interacting with a cam 18 mounted on the base with the help of a stand 19 and providing them with a variable swing amplitude.

On the main rocking chair .12 planted on the axis 20 (0-0 coaxially), the intermediate rocking chair 21 can be rotated. in the interaction of its copier 22 with a finger spike 23, which is mounted on the main rocking chair 12 and the spring 24

is pressed to the fixed ring stop 25, the turning of the finger in the main rocking body 12 is limited by the key 26.

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The intermediate rocking chair 21 carries an adapter 27 with a spatula 28, mounted on an axis 29, and two rods 30, along which creep 31 moves with self-centering two shoulders 32, a spring 33 and a wedge 34,

permanently engaged with a fixed ring stop 35. The kinematic connection of the wedge 34 with the vertical support 6 is carried out through a self-braking 36, the hydraulic distributor 37 and the hydraulic motor 38 of the hydraulic booster mounted on the tailstock 5. The position of the longitudinal support 2 at the start grinding is determined by an adjustable stop 39 installed in the tailstock 5.

The free ends of the levers 32 are pressed against the wedge 34. With the help of the spring 40. The vertical support 17 interacts with the cam 18 via an adjustable stop 41.

The device is operated in the following manner.

The longitudinal slide 2 is retracted to the extreme left position, the wedge 34 is withdrawn from the engagement with the levers 32, the ends of which under the action of the spring 40 (Fig. 2) diverge, releasing the working area, while the spring 36 is compressed and the lever 36 rotates, affecting the distributor valve 37, which commands the hydraulic motor 38, and the vertical support 6 is retracted to its highest position. In adapter 27, the blade 28 is secured and the caliper 2 returns to its original position until the lever 36, and the wedge 34 is released. Under the action of the spring 33 wedge 34 hedgehogs 5

wipes the ends of the levers 32 before contact with the blade feather in the design section A and centers the edge of the pen relative to the vertical passing through the swing axis 0-0. At the same time, the wedge 34, interacting with the lever 36 through the distributor 37, issues a command to the hydraulic motor 38 to move the vertical support 6 with the abrasive wheel 8 to the initial position and stabilize it. The engine 13 is turned on, which through the gearbox 14 with the crank, the rocker 15, the gear pair 16 and the spindle 11 communicates the swing motion to the main rocker 12 with a paddle. Moving the vertical caliper 6 with the screw 9 achieves an edge rounding radius in section A. The magnitude of the blade swing amplitude is controlled by the stop 41, and the blade is turned over by twisting the section profile A with a cam 22 and a finger 23, the spike of which is in the copier groove.

Includes the working movement of the longitudinal slide 2 from the motor 3 through the gearbox and screw pair 4. The blade 28 moves relative to the abrasive wheel 8 and levers 32, while with the edge thickness of the pen decreases, the levers of the pen 32 under the action of the wedge 34 converge, continuously centering the feather on the actual thickness edge and turning the adapter 27 on the axis, corrects the actual rotation and displacement of the cross sections of the pen relative to the base surfaces of the blade, and the movement of the wedge 34 provides movement of the vertical support 6 by an amount corresponding to change the actual thickness of the edge along the pen. The finger 23, abutted against the anvil 25 and caught in engagement, with the copier 22 smoothly turns the intermediate rocker 21 with the spatula to the calculated amount of twist of the pen. The vertical slide 17, in contact with the cam 18 through the stop 41, moves in a vertical plane and provides a smooth change in the magnitude of the swing amplitude.

Thus, the movement of the swing of the blade around the axis 0-0 provides

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rolling the abrasive wheel along the radius and obtaining the correct shape of the rounding edge, the presence of self-centering levers and their kinematic connection with the feeding of the abrasive wheel to the cutting eliminates errors from fluctuations of the actual thickness of the edges (within the tolerance on the profile), fluctuations of the allowable displacement and rotation of the profile of sections relative to the lock (shelves) and provides dimensional processing of the radius of the rounding edges.

The presence of movement of the blade turning over the copier and the adjustable swing amplitude of the blade exclude the possibility of cutting the pen profile in the area of the corner points of the rounding radius with the profile of the back and trough of the pen.

Claims (3)

1. A device for rounding off the edges of the blades, on the frame of which the blade holder is placed, the swing knot with the drive, the mechanisms for positioning the product and the longitudinal movement of the blade, which is equipped with a spring-loaded device relative to its blade to improve the quality of processing a copier and coaxially mounted this rocking chair and kinematically connected with the product base mechanism with an additional rocking chair with a copier mounted in contact with the copier finger, while the holder products installed on an additional rocking chair, 2. The device according to claim 1, characterized in that it is provided with a stop mounted on the frame intended for interaction with a copy finger. 3. The device according to paragraphs. 1 and 2, about t - in that it is additionally equipped with a rocking swing amplitude adjustment mechanism, made in the form of a caliper, are carried; 1 its blade rotor drive, kinematically connected with the gantry assembly. thirty 35 40 45 50 Js 11.2