SU120139A1 - Adaptation to centerless grinding machine for processing crosses necks, for example, cardan car - Google Patents

Description

The centerless shpufer ytans for processing all four crosses of the cross with the use of a loading mechanism are known.

A distinctive feature of the proposed Pellet | Connector of the same designation is the use of a vertical column with a hydraulic lift installed on the machine bed, originally intended to be delivered from the loading mechanism of one Cross to the chain for processing one pair of its necks and afterwards moving the cross to the hydraulic a cylinder with two rods, one of which serves to turn the cross on 90 for grinding the second pair of its necks, and the other rod is designed to output the cross the blame from Shakhty at the end of the processing of all its four necks.

Such a constructive implementation of the device ensures the consecutive processing of both pairs of the crosses of the crosspiece with two grinding wheels without unloading it from the machine, which leads to an increase in the accuracy of processing as compared to four circles simultaneously operating in known special machines, which do not allow to precisely keep the size due to unequal numbered wear.

FIG. 1 is a side view of the proposed fixture; in fig. 2 - front view; in fig. 3 is a section along AA in FIG. 2; in fig. 4 is a section along BB BB of FIG. 3; in fig. 5 is a diagram of the operation of the proposed fixture.

A vertical column 2 is attached to the centerless grinding machine bed. A shaft 3 is attached to the front of column 2, having guides 4 for a hydraulic lift 5. The lift 5 moves up and down the column shaft with the aid of numbers 120139-2 -

hydraulic drive 6 mounted inside the column 2. On the lift 5, the fist 7 is fixed, acting on the limit switches 8. The loading mechanism 9 has two posts 10 with grooves for guiding the workpiece. The cutter P feeds on the machine knife one cross to be processed.

The mechanism of rotation of the cross and. its output from the machine consists of a hydraulic cylinder 12 in which two rods 13 and 14 are mounted; rod 13 through gear-rack and pinion gear 15 rotates the cross by 90 °, and stem 14 displays the cross from: the machine at the end of its processing.

The cylinder 16 is designed to open the window for the removal of the treated cross.

The adaptation works according to the following automatic cycle (Fig. 5.). Lift 5 is in the loading position. When the button is turned on, the operation position starts to lower. In the lowest position of the elevator, the crosspiece rests on the machine knife. At the same time, the limit switch turns on the fast feed of the wheelhead and then the working feed.

After the end of the movement and processing of one pair of necks, a rapid retraction of the headstock begins, and at the same time the elevator rises.

The elevator, reaching the extreme upper position, presses the limit switch, which ensures the cross travels down and rotates 90 °. After reaching the extreme position downward, the crosspiece rests on the knife and the second pair of trunnions is ground.

After grinding is completed, a command is given to go up to the "takeaway" position.

At this time, the cylinder 16 moves the valve, opening the window for the removal of the processed cross. The rod 13 takes it out of the machine.

After the stem 13 is returned, the elevator is lowered to the loading position, where the cutter mechanism delivers one crossbar to the elevator, and the cycle repeats.

Subject invention

The adaptation to a centerless grinding machine for processing the jaws of the cross, for example, a caran with the use of a loading mechanism, characterized in that, in order to carry out sequential processing by two grinding wheels of both pairs of the necks of the cross, without unloading the last of the machine and ensuring an increase in the accuracy of processing, mounted on the machine bed vertical column with a shaft for a hydraulic lift, intended for initial delivery from the loading device One cross on a machine knife with processing one pair of its necks and the subsequent movement of the cross to a hydraulic cylinder with two rods, one of which serves to rotate it 90 ° with processing the second pair of its necks, and the other tends to remove the cross from a shaft the end of the processing

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