SU1209418A1 - Honing-lapping machine - Google Patents

Description

one

The invention relates to mechanical engineering and can be used in the final processing of tilindrical surfaces.

The aim of the invention is to improve the accuracy and quality of processing.

The goal is achieved by reducing the dynamic loads on the spindle and creating unique toolpaths.

FIG. 1 shows the kinematic. ka scheme of finishing and finishing machine; 2 is a section A-A in FIG. one.

The honing and finishing machine contains a drive for rotating and oscillating movements of the spindle with different frequencies and a drive for reciprocating movement of the tool along the axis of the work piece.

The drive of rotation and oscillatory motions of the spindle includes the electric motor 1, connected via the V-belt drive 2 and the stepped pulley 3 to the intermediate shaft 4. The latter is connected to the central wheels 7 and 8 of the conical differential by means of the V-belt variator 5 and gear train 6. , including satellites 9 and 10, whose common axis is made in the form of a curved Z. -shaped gazal I 1. One of the satellites is rigidly connected to the shaft, and the other is mounted for free rotation. A conical differential is installed with a spindle 12, the upper end of which is missed in the bore of the central wheel 8 and is kinematically connected by means of a fork 13 to a curved shaft 11.

The axial oscillation mechanism is also coaxially with the spindle and includes two identical face cams 14 and a bearing washer 15, which is rigidly fixed on the spindle and interacts with the working surfaces of the cams with two balls 16, covered by one separator 17. The end cams 14 are fixedly fixed in the sleeve 18, which is connected by a chain of rotation of the central wheel 8,

The drive of the reciprocating motion is intended to communicate to the tool 19 a slow movement along the axis of the machined

-

ten

2094182,

hoist 20 and contains a reversible motor 21, a gearbox 22, a lead screw 23, working in tandem with a nut attached to the shank box 24. The stroke of the spindle box is adjusted depending on the length of the workpiece with the help of a control mechanism (not shown) made in the form of end switches, which command to reverse the electric motor 21. For the translational movement of the instrument, mechanisms of other types can be used, for example, scenes or hydraulic drives.

The machine works as follows.

When the processing cycle is issued, the motor 21 is turned on and the spindle box 24 is slowly moved downward from the code screw 23 of the spindle box 24. Tool 19 is inserted into the hole of the machined

25 parts 20, which is mounted on a fixed table of the machine. After the input, the electric motor 1 automatically turns on, the tool rotates and oscillates

15

20

30 ny, it is expanded and reciprocated along the axis of the workpiece.

When you turn on the motor 1

the movement is transmitted by the V-belt transmission 2 to the intermediate shaft 4, which, through the V-belt variator 5 and the gear transmission 6, imparts rotation in opposite directions.

and at different speeds with a central wheel 7 and 8 of a conical differential. From the central wheels, the rotation is transmitted to the satellites 9 and 10 and the bent 21 rigidly connected with the satellite 10 — reversed to the shaft 11. The rotational movement of the Zl-shaped shaft rotates its own axis and is converted by means of a fork 13 into (Circular oscillations of a spindle 12 s amp)

hptudoy equal to the angle of inclination of the Z-shaped shaft.

Due to the difference in rotational speeds of the central wheels 7 and 8, the satellites and the Z-shaped wap associated with them simultaneously with the rotation around their own axes, receive a running around the axis of the central wheels, simultaneously with the spindle312

but with circular oscillations, slow rotation. The spindle rotational speed is proportional to the difference in speeds of the central wheels and is controlled steplessly by means of a V-belt variator 5. The average gear ratio of the variator is chosen equal to the gear ratio of the gear train 1} 6, which allows the spindle rotation to be reversed and provides the same speed control range in both directions.

At the same time, the sleeve 18 is communicated through the gear train 6, in which the end cams 14 are fixed. During rotation, the post 84

When the balls 16 run synchronously along inclined surfaces and annular grooves of the bearing washer 15, axial oscillations are reported to the spindle 12. At the same time, due to circular oscillations of the bearing washer 15 relative to the end cams, additional modulating axial oscillations arise with a frequency equal to the frequency of circular oscillations. As a result, the spindle receives modulated axial oscillations with continuously changing the initial phase and frequency. Such a mechanism allows shock-free and with minimal inertial loads to generate oscillations with high frequency.

21

tput 1

13

VNIIPI Order 368/19 Circulation 739 Subscription Branch ShSh Patent, Uzhgorod, Proektna St., 4

FIG.

Claims (1)

HONING AND FINISHING MACHINE, comprising a spindle with a tool mounted on supports with the possibility of rotation and axial movement, rotation and reciprocating spindle drives and mechanisms of circular and axial vibrations, and the circular oscillation mechanism is made in the form of a conical differential, characterized in that, in order to increase the accuracy and quality of processing, the conical differential is kinematically connected with the rotation drive of the central wheels with the possibility of rotation in opposite directions at different speeds, Moreover, the axis of the differential gears is made in the form of a curved Z-shaped shaft kinematically connected to the spindle, while one satellite is rigidly connected to the shaft, and the other is installed with the possibility of free rotation, and the axial vibration mechanism is made in the form of two end fists mounted with the possibility of β interaction by means of balls with a support washer mounted on the spindle, and the end fists of the axial vibration mechanism are rigidly connected to one of the central differential wheels. SU „1209418>