SU751568A1 - Support for placing thin-walled shells with end beads - Google Patents

Description

The invention relates to the field of Machine Tool Construction and can be used in the turning of thin-walled shells with thickening of their ends. A device is known that includes a housing "installed therein (hw, rolling bearings 1). The disadvantage of the device is low machining accuracy. The proposed device improves machining accuracy by automatically adjusting to the diametrical size and eliminating the influence of the ovality of the base surface. a hydraulic cylinder with a piston, equipped with an internal conical surface, and an aporn ring with an internal conical surface, fitted with a microcrystal (S1ShM) injection of an exact axial axle escheni, both bevel The surface form a loop, and supporting bearings are provided on -kacheni .kontsam na.ruzhnym; and conical surfaces and are arranged in said closed circuit. FIG. I shows the device section; in fig. 2 is a section along the AL in FIG. 1. The device consists of a housing / hydraulic cylinder mounted on the bed 2 of the lathe. Two support rings 5 and 4 with internal conical surfaces are mounted into the housing bore /, the ring 3 simultaneously serves as a piston of the hydraulic cylinder, and the ring 4 is able to move in the axial direction using a micrometer screw 5. The cavity of the power cylinder is limited from the front side by a flange 6 sec. an inlet 7 into the working cavity 8 of the cylinder. In the return cavity 9 of the hydraulic cylinder, the liquid is supplied through the inlet opening 10. Inside the closed circuit formed by the inner conical surfaces of the rings 3 and 4, there are placed fixed in the separator V / supports of the rollers 12 provided with the ends of the outer conical surfaces and supporting the blank 13 In addition, the workpiece 13 is fastened in the chuck 14 of the lathe. The start of work is performed by adjusting the reference ring of the rollers 12 of the proposed device to the required diameter D, which is selected several times the diameter D of the base surface, following the way.

The working fluid is fed under a slight pressure of -1 km through the inlet 7 to the working 8 cavity of the hydraulic cylinder. Under its influence, the piston-ring 3 moves to the right, interacting with its conical surface with the cones of the rollers 72. shifting them to the center, until its cylindrical surfaces touch the reference ring. If the rollers 12 have not touched the reference ring, then by rotating the micrometer screw 5, they will move the ring 4 to the left until the rollers 12 touch the reference ring. Then, the working fluid through the opening 10 is supplied to the returning 9 cavity of the hydraulic cylinder I, the piston-ring 3 is displaced to the left, and the rollers 12 are diverged in the radial direction. The pressure of the working fluid in the hydraulic cylinder is regulated steplessly and is set to the required limits depending on the geometrical dimensions, stiffness and material of the workpiece. The blank 13 is inserted and secured in the lathe chuck 14. Next, the liquid is supplied through the supply hole 7 into the working 8 cavity of hydrodilipdra. The piston ring 3 moves to the right and shifts the bearing points 12 towards the center until they fix the workpiece 13. Since the rollers 12 are inside a closed contour formed by the conical surfaces of the ring 4 and the ring 3, they move to the center synchronously, while straightening the ovality and choosing a gap, which may occur due to fluctuations in the outer diameter of the base surface within the tolerance for manufacturing. Then the rotation of the workpiece 13 is reported and the mechanical

thickening treatment. At the end of the machining process, the workpiece stops rotating, then the working fluid through the inlet 10 is supplied to the return cylinder cavity 9 and the piston ring 3 moves to the left, the rollers 12 move apart and release the workpiece 13. At the same time, the workpiece 13 is removed from the cartridge 14. Then the working cycle repeats .

For | rmula invention

Lunette for installation of thin-walled shells with thickenings at the ends, containing a housing fixed to the lathe frame and supporting rolling bearings, so that, in order to improve the machining accuracy by automatically adjusting the diametral size. eliminating the influence of the ovality of the base surface; a hydraulic cylinder with a piston fitted with an internal conical surface and a support ring with an internal conical surface equipped with a micro-axial screw of precise axis are installed in the housing th peremescheai, wherein both of said conical surfaces form a closed loop, and

The supporting roller bearings are provided at the ends with external conical surfaces and are located in the said closed loop.

The source of information taken into account in the examination:

1. Anserov M. A. Adaptations for machine tools. L., “Mechanical Engineering, 1975, p. 400

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Claims (1)

Claim Lunette for installing thin-walled shells with thickenings at the ends, comprising a housing fixed to the lathe bed and supporting rolling bearings, characterized in that, in order to increase the accuracy of processing by automatically adjusting the diametrical size and eliminating the influence of ovality of the base surface, a hydraulic cylinder with a piston is installed in the housing equipped with an internal conical surface, and a support ring with an internal conical surface, equipped with a micrometer screw for precise axial displacement Nia, wherein both of said conical surfaces form a loop, and supporting rolling bearing fitted on the outer ends of the conical surfaces and are arranged in said closed circuit. Source of information taken into account during the examination: 1. Anserov M. A. Devices for metal cutting machines. L., "Engineering", 1975, p. 400. 51568 Fig. /