SU284898A1 - Semi-automatic grinding and grinding machine for rounding the edges of the pen blades of a gas turbine engine - Google Patents

Description

Known electrically-grinding semi-automatic machines for rounding the edges of the pen blades of a gas turbine engine with a fixed contact roller and a moving part mounted on the frame.

Such machines provide machining of edges formed only by ruled surfaces and therefore have relatively narrow applications.

To communicate the treated blade, a complex feed motion around the douh of intersecting axes, one of which is the longitudinal axis of the blade, the proposed semiautomatic device is equipped with two kinematically connected rockers, one of which has a cam-and-cam mechanism with a constantly varying shoulder ratio.

The proposed belt-grinding semi-automatic machine allows to mechanize the processing of a wider range of blades, including blades, the edges of which have a non-passable surface formed by a spatial curve of variable radius.

their quality and productivity increase.

The drawing shows the kinematic diagram of the machine.

5 On the base of the machine 1 and on the two rocking chairs 2 and 3, the main mechanisms of the machine are located: the drive of the main abrasive belt movement, the mechanism of its tension, the drive of the feed movement, including the product feed mechanism and the mechanism of its running in.

Q The drive of the abrasive belt is carried out from the electric motor 4 by means of a V-timing; transfer rotating drive roller 5. Infinite abrasive belt 6 makes translational motion relative to the non-rotating end lUOn

g roller 7, which serves as a support for the tape in the treatment area. The belt is tensioned using a tension roller block 8, which allows the belt to be tensioned during a reciprocating oscillating movement of a contact roller driven by an eccentric 9.

Claims (1)

The tensioning rollers move from the spring 10 through the yoke 11 and are coordinated with a self-engaging oil damper 12, eliminating blows in the system. The blade 13 is set on the rocking chair 2 and is driven in a swinging movement in the direction shown by the arrows 14 on the E-axis of the O. The swiveling motion of the blade is communicated from the cam 15 placed on the distribution roller through the swing roller 16, the rail 17, the toothed sector 18, the steel strip drive 19 and the hinge mechanism 20. of the hinge mechanism arallelna axis follower roller 22 interacting with cam surface 23. The latter is identical to the contact surface .rolika 7, the axis of their working surfaces are aligned, and different diameters st equals the difference between the distances of the corresponding points of the blade to the treated surface of the axes of rotation D and D j given; thickness of the abrasive tape. The wear of the abrasive belt is compensated by moving the copier 23 away from the adjusting screw 24. The relative movement of the copier roller 22 along the surface of the copier 23 determines the pattern of the running movement performed by the treatment blade relative to the contact roller 7. The running motion is communicated to the blade from the rocker-cam mechanism placed in the rocking chair 3 This mechanism consists of a cylindrical fist 25, driven into rotation from a gear reducer 26 through a worm to 27; a roller 28 communicating the swinging movement of the movable frame 29 and the rocker side of the AOR. One backstage arm is placed on the frame 29, and the second in the fixed guides 31 of the rocker 3. On the backstage there is a slider 32, which can be rocked in the trunks 33 of the carriage 34 under the influence spring 35, pressing the carriage down. The carriage 34 is also articulated by a sub-coupling with a cam roller lever 36, telling the slider a reciprocating movement along the link. This achieves a change in the ratio of the shoulders of the rocker arm 4. mechanism according to the law given by the driving cam. 36. As a result, the ranges of swing oscillation amplitude 3 around the axis 37 are provided. The tension in the system is provided by the spring 38. The machine works in the same way. The blade to be machined is set along stops (not shown in the diagram) to the initial position. Wears abrasive tape. Installing and replacing the abrasive belt is done by turning the lever 39, which, through the pull 40, weakens the spring 10 and turns off the damper 12. Turning on the electromotor 4 drives the abrasive tape 6 and the eccentric 9. The movement of the product feed is communicated by a gear 26, which drives the distribution a shaft with cams 15 and 36 and a cylindrical cam 25. From cam 15, the blade 13 receives a swinging motion around the axis O. The cams 36 and cam 25 provide a swinging movement of pump 2 around the vertical axis of the rail 17 and swing 3 one hundred and continuously varying the amplitude of oscillation about the axis 37 which permits relative movement of the blade along the machined running edge of the pen over the surface of the contact roller. Claims of the belt-grinding semi-automatic machine for rounding the edges of the blades of a gas turbine engine with a fixed contact roller and a moving part mounted on a frame, characterized in that, to communicate the processed blade of complex feed movement around two intersecting axes, one of the tx is prom the axis of the blade, the semi-automatic mat, is equipped with two kinematically connected rocking chairs, on one of which a cam-cam mechanism is installed with a constantly varying ratio of the shoulders.