SU948632A1 - Polishing table - Google Patents

Description

() POLISHING MACHINE

The invention relates to the field of mechanical engineering and can be used in the machining of parts such as rotation bodies. A polishing machine for machining parts such as rotation bodies is known, which contains a drum with planetary spindles of machined products and rotational drives of the drum and spindles, a device that fixes the drum against rotation, as well as a polishing head mounted on mechanisms for its longitudinal feed and plunging 1. The known machine has the following disadvantages: limited technological capabilities, which prevents the processing of fillets of parts; low productivity, since the drum is not rotated when machining a part, but fixed against rotation, as a result of which, after a part has been changed, the drum must be unlocked and rotated at a certain angle, which requires a certain amount of time. . The aim of the invention is to expand the technological capabilities of the machine by providing the processing capabilities of the surfaces of rotation of parts with fillets. The goal is achieved by the fact that the machine is equipped with a rocker arm mounted rotatably in two mutually perpendicular planes, and a mechanism for longitudinal movement of the polishing head, kinematically associated with a drum rotation drive mechanism, the polishing head being mounted on the lower end of the rocker arm, and the longitudinal mechanism movement is made in the form of a crank device and a pivot arm mounted with the ability to interact with the rocker by means of the ok pusher with roller and a return spring. FIG. 1 shows a polishing machine (cut along the spindle of the drive for rotating the drum); in fig. 2 machine, top view; in fig. 3 - section A-A. one; in fig. 4 - grinding device, incision; in fig. 5 schematically shows a drive for feeding a polishing wheel. On the partitions 1 of the frame 2, the body 3 is fixed, in which a shaft 5 is mounted on the bearing supports 4,

bearing drum 6, made in the form of a disk, in which spinels 7 of machined parts 8 are installed evenly around the circumference.

The rotation of the drum is driven through a bevel gear 9 and a bevel gear 10 mounted on the output shaft of the gearbox 11. The polishing wheel 12 is mounted on the shaft of an electric motor .13,1 located on the wheel feeding mechanism.

The feed mechanism is made in the form of a yoke 14, mounted to rotate around the horizontal axis O-O (Fig. 2), with the O-O axis fixed on the vertical axis 15, perpendicular to the axis. The axis 15 is mounted on a horizontal slide 17 with the possibility of displacements in the horizontal guide beds by means of a bearing support 16. The slide 18 has a nut 19 (Fig. 5), in engagement with which there is a lead screw 20 equipped with a pulley 21 (Fig. 2). A pulley 21 with a belt drive 22 is connected to a pulley 23 mounted on a shaft 24 mounted rotatably in bearing supports 25 and provided with a manual feed handwheel 26. On the balance beam 14, a weight 27 is installed, the magnitude and location of which on the balance beam sets the pressing force of the polishing wheel to the workpiece.

The rotation drive of the drum b is kinematically associated with the mechanism for the longitudinal movement of the polishing wheel 12 along the axis O | -O (j of the workpiece 8. Longitudinal feed is carried out by turning the rocker arm 14 around the vertical axis 15. Alth. Gearing with the toothed conical wheel 9, there is a conical gear gear 28 mounted on a shaft 29 mounted for rotation in the bearing supports 30. On the shaft 29 with the possibility of adjusting the position along the radius is fixed a crank .31, pivotally connected by a connecting rod 32 to the lower end of the lever 33, having the ability to rotate on a vertical axis 34, mounted in bearing supports 35. Upper end of the lever 33 contacts the tappet 36, mounted for horizontal movement in a sleeve 37. The pusher 36 is provided with a freely rotating roller 38 in contact with the side surface of the rocker 14; Poggi rocker arm 14 to the roller 38 is effected by a spring 39.

The spindles 7 are made in the form of a housing 40 (FIG. 4), in which hollow shafts 42 are mounted on bearings 41, equipped with pulleys 43 fixed to them. Inside the shafts there are pushers 44 equipped with contact heads 45 against which compression springs 46 abut abutted on end surfaces with spider 43; pushers 44 are screwed into collets 47 for fastening the workpieces 8.

Pulleys 43 bend around an endless flexible belt 48 (FIG. 3) mounted on rollers 49 and 50, one of the first ones (50) is made driving, and axis 51 (FIG. 1) of the second roller is attached to the frame. The roller 50 is mounted on the shaft 52 of a worm gearbox 53, the input shaft of which is connected to an electric motor (not shown in the figures). The tension roller 54 is mounted on a lever 55, and an OSB of rotation 56 of which is located on a frame in bearing supports; Belt 48 rounds the pulleys 43 only of those spindles, which are located on the side of the polished circle.

On cam 1, cam 57 is fixed, heads 45 of pushers 44 of collets 47 interact with KOTopKiM, when pulleys of 43 spindles come out of contact with belt 48.

When the machine is in operation, the weight 27 rotates the beam 14 around the axis O-O of the spinning polishing wheel 12 to the workpiece 8, which rotates with the spindle driven during rotation by the endless belt 48. The drum 6 slowly rotates from the drive motor. The spindle is turned together with the drum. The workpiece, turning together with the drum around the axis in a clockwise direction, presses the rotating polishing wheel 12, which in turn transmits the force to the stern 14, turning it counterclockwise. In the lower position of the rocker arm 14, the workpiece protrudes from under the circle, as a result of which, under the action of the load 27, the rocker arm 14 is rotated clockwise to its original position - before meeting the new part fixed on the next spindle. Part 8, continuing to turn with the drum, comes to position, in which its spindle pulley disengages from the belt 48 and stops. The head 45 of the pusher 44 locates on the cam 57 and expands the collet 47. The workpiece is released.

Claims (1)

Simultaneously with the rotation of the drum from the bevel gear 9, the shaft 29 rotates, which through the crank 31 transmits the movement of the connecting rod 32, and the latter through the lever 33 displaces the pusher 36. At the same time, the roller 38 presses the rocker 14 and informs it "swinging about the vertical axis 15." At the same time, the polishing wheel 12 makes movements along the axis of the part, machining it in its extreme positions. The polishing machine allows to increase productivity due to the fact that, due to the synchronous rotation of the drum and the following rotor, the parts are processed continuously. An invention of a polishing machine comprising a drum with product spindles planetaryly disposed thereon, rotation drives of a drum and spindles, a polishing head and a mortise feed mechanism, characterized in that in order to expand technological capabilities by providing machining surfaces of rotations of parts with fillets , the machine is equipped with a rocker, installed with the possibility of rotation in two mutually perpendicular planes, and a mechanism for the longitudinal movement of the polishing head, kinematically with connected to the drum rotation drive mechanism, the polishing head is mounted on the lower end of the rocker arm, and the longitudinal movement mechanism is designed as a crank-connecting rod device and a pivot arm mounted to interact with the rocker by means of a roller pusher and return spring introduced into the machine. Sources of information taken into account in the examination 1. M. Garber. Decorative grinding and polishing. 2nd ed., M., mechanical engineering, 1964, pp..175-186.