SU1110546A1 - Machine for working non-rigid parts - Google Patents

Abstract

MACHINE FOR PROCESSING NON-STRONG DETAILS containing spindle and tailstock mounted on the frame with centers housed in a housing mounted on a caliper coaxially aligned with the spindle headstock rotating workpiece with spindle heads mounted on it with the possibility of radial movement of support rollers whose axes are perpendicularly inserted. , characterized in that, in order to improve the machining accuracy, the machine is additionally equipped with a slider mounted in the holder with the possibility of axial movement, the support rollers are mounted The levers introduced into the machine, whose swing axes are fixed in the holder, and the diameter of the cantilever part of the center are determined by the ratio, 2 i, -3. d 6,625-10 xi d where ol Р - diameter of the cantilever center, cm; - length of the cantilever part of the center, cm; axial movement of the slider, GL at the required for deforming the center, cm; oL tilt angle of the lever. to the spindle axis, hail.

Description

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Ot) The invention relates to machine tools. A known machine for machining non-rigid parts comprising spindle and tailstock mounted on a bed with centers located in a housing fixed on the soup port, a rotating holder coaxial with the spindle headstock spindle with rotating rollers mounted on it with the possibility of radial movement perpendicular to the axis. spindle G1 3. However, the known machine is characterized by low machining accuracy. The aim of the invention is to improve the machining accuracy by maintaining the position of the axis of the workpiece. This goal is achieved by the fact that a machine for machining non-rigid parts containing spindle and rear heads mounted on a frame is housed in a housing mounted on a caliper coaxially with a rotating clip with spindle headstock mounted on it with the possibility of radial movement of support rollers axis which are perpendicular to the axis of the spindle, additionally equipped with a slider mounted in the holder with the possibility of axial movement, the support rollers are mounted on the levers introduced into the machine, axes, to Chaney which are fixed in a holder, and the diameter of the cantilevered portion of the center is defined by the relation a) 6.625 -10 wherein - the diameter of the center console portion, cm; I is the length of the cantilever part of the center, cm; axial movement of the slider required for deforming the center, cm; angle of inclination of the lever to the spindle axis, hail. Such an embodiment of the device ensures a reduction in the allowance for machining the shaft (metal content), since axial movement of the slide, which acts as an end on the axis of the rollers, deforming forces are applied to the shaft at one or two points, and at the moment 62, all three rollers - will come into contact with the shaft, the center of its section will be aligned with the axis of the spindle. After the three-point contact of the shaft with the supporting elements is achieved, further displacements of it are eliminated due to the high radial rigidity of the supporting elements and the choice of magnitude, axial force on the slide, ensuring continuity of contact under the action of maximum force with maximum eccentricity. The combination of the center of the section with the axis of the spindle in the middle part of the shaft occurs mainly due to the deformation of the shaft, near the end face due to the deformation of the flexible. The supply of a machine for machining non-rigid shafts with two collars located on both sides of the tool and having the ability to enclose circles of different diameters allows continuous processing of shafts of variable cross section without changing the supporting elements. FIG. 1 shows a machine, a general view; in fig. 2 shows a section A-A in FIG. The machine contains compliant centers 1 and 2, one of which is located in the spindle of the 3 spindle headstock, and the second - in the tailstock (not shown) of the machine. Centers 1 and 2 are designed to install the machined shaft 4. The machine also contains lunettes 5 and 6, located on the longitudinal slide of the slide 7, cutter 8 mounted on the transverse slide of the slide 9 with the possibility of radial movement. Rests 5 and 6 contain a housing 10, in which a bearing 3 coaxially with the spindle 3-mounted the cage 12, inside which the slider 13 is mounted with the possibility of axial movement. The lever 14 and the rod 15 of the hydraulic cylinder 16 are movably connected with the slider 13. In the grooves of the yoke 12, three levers 18 are pivotally mounted by means of the axes 17, in the slots of which axles 19 are movably mounted on the axle 19 20. The stops 21 are fixed to the slider 13, axis 19. The machine for processing non-rigid shafts works as follows. In compliant centers 1 and 2, the billet of shaft 4 is secured, and the cutter 8 is set to transversely slide the transverse slide of the slider plate. 6 is outside the processing area

When applying pressure to cylinder 16 of lunette 5, slider 13, moving to the left, with its end acts on the axis 19 of the rollers 20 and turns the levers 18 around the axes 17. Under the influence of efforts from one or two rollers 20, the pliable center 2 and the shaft blank 4 are deformed and at the moment when all three rollers 20 come into contact with the shaft 4, the center of its section will be aligned with the axis of the spindle 3. After reaching the three-point contact of the shaft 4 and with the rollers 20, further radial movements of it are eliminated due to the high radial rigidity of the supporting elements s and select quantities axial force on the slider 13, providing continuity of contact

shaft 4 with rollers 20 under the action of maximum cutting forces on the shaft with maximum eccentricity. When using lunette 5 cutting force

perceived mainly by bearings 11. After securing the billet of shaft 4 in lunette 5, the drive of the spindle 3 turns on and the drive of the axial feed of the slide 7

(not shown).

By successively securing the billet of shaft 4 in lunettes 5 and 6, a variable cross section is processed along its entire length,

The use of the machine to be subdivided ensures uniform removal of the allowance regardless of the curvature of the shaft and the displacement of the center holes relative to its outer surfaces, since during processing the center of each cross section of shaft preparation is aligned with the rollers with the axis of rotation of the spindle, as well as

Increased processing accuracy.

Claims (1)

MACHINE FOR TREATING NON-RIGID PARTS, containing a spindle and a tailstock mounted on a bed with centers, located in a housing fixed on a support, coaxial with a spindle of a headstock, a rotating holder with support rollers mounted on it with the possibility of radial movement, the axes of which are perpendicular I mean, with the aim of gaining flwj K 9 214 15 7 I machining accuracy, the machine is additionally equipped with a slider mounted in a holder with the possibility of axial movement, the support rollers are mounted on levers inserted into the machine, the swing axes of which are fixed in the holder, and the diameter of the center console is determined by the ratio s N = 6.625-10 ³ -. where <9 is the diameter of the console part of the center, cm; V is the length of the console part of the center, cm; . X .- axial movement of the slider needed to deform the center, cm; - the angle of the lever. to the spindle axis, deg. SU „„ 1110546>