SU1641515A1 - Universal two-jaw lathe chuck - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in devices for securing blanks on a lathe spindle. The aim of the invention is the expansion of technological capabilities. Perpendicular to the guides in the center of the cartridge has a groove with a through hole in the middle. In the groove there are a bridge bridge b and a movable fork 7, connected with the axial movement mechanism, made in the form of a rail 8 with wedge surfaces connected with the wedge surfaces of the fork tail 7 and screw 9. In the housing there is the cam movement mechanism together with the screw 3, it consists of a body in which a rotating axis with a screw is installed and fixed by a nut. Coarse adjustment along the Y axis is performed as follows: by releasing the screw, the body is moved forward until the threads of the screw and teeth are connected, applied on the side surface of the cam 2, clamp the screw; I will act on the screw 9; the movable plug 7 is withdrawn from the groove in the screw 3. Rotating the axis, the screw - cam system is displaced to a predetermined distance along the scale on the chuck body and the vernier on the cam 2, y axis

Description

The invention relates to a machine tool industry, namely to devices for securing blanks on a lathe spindle.

The purpose of the invention is the expansion of technological capabilities.

Figure 1 shows the cartridge, a General view, side view; figure 2 is a section a - a in figure 1; on fig.Z - view B in figure 1; figure 4 is a view In figure 2; figure 5 - section G - G in fig.Z; figure 6 is a view of D on fig.Z; Fig. 7 is a spatial view of the mechanism for the axial movement of the plug; Fig. 8 shows an embodiment of the stops in the setup position; figure 9 is a view of E on Fig.

In the housing 1 of the cartridge, the cams 2, which are interconnected by a screw 3 with left and right threads, move along the guides. In their upper part, the cams have expansions with grooves through which the cams can be fixed with interchangeable bolts 4 in the threaded holes 5 of the housing 1 at a predetermined distance from the center of the cartridge.

Perpendicular to the guides in the center of the cartridge there is a groove with through holes in the middle. In the groove there is a bridge bridge 6 and a movable fork 7, associated with its axial movement mechanism, made in the form of a rail 8 with wedge surfaces connected to the wedge surfaces of the shank of the fork 7 and screw 9, freely held by the nut 10 in the cartridge case . The screws 11 through the washers 12 and the crackers 13 rigidly fix the bridge-bridge 6 and freely support the rail 8.

A mechanism for moving the cams together with screw 3 is installed in the chuck body 1.

The mechanism consists of a housing 14, in which a rotating axis 15 with a screw 16 is mounted and fixed by a nut 17. The mechanism housing 14 is fixed in a predetermined position with a screw 18. A tooth 19 is made on the side surface of one of the cams.

The x-axis stop consists of a square-stop 20 with a through groove on the bottom surface, a bracket 21 with two

holes for mounting screws and one screw hole for the adjusting screw 22 and mounting screws 23. For adjustment, end measures 24 and

indicator 25.

The device works as follows.

Adjusting the cartridge on axes X and Y is coarse and precise.

Coarse adjustment on the Y axis with accuracy

up to 0.1 mm. After releasing the screw 18, the mechanism housing 14 is fed forward before the threads of the screw 16 are connected to the teeth 19, which are applied to the side surface of the cam 2. Clamp

screw 18. Acting on screw 9, the movable plug 7 is withdrawn from the groove in screw 3. Rotating the axis 15, the screw – cam system is displaced to a predetermined scale distance on the cartridge body and nonius on the cam 2

(type D). Clamp cam with replaceable bolts 4.

Fine adjustment of the cams along the Y axis. Fork in the groove of the screw 3. The end cams are installed and the end cams easily attached

measure H2, where H is the height of a given coordinate

Y. Then pull out the plug 7 and enter the mechanism

movement of the cams together with the screw.

Having installed the indicator leg on the working surface of one of the cams and rotating the cartridge together with the machine spindle, expose both cams to O, i.e. an equal distance from the center of the cartridge. One of the cams

fasten with replacement bolts 4, remove the end measures, disable the cam movement mechanism. The fine adjustment of the stop along the X axis is as follows. Between two movable (floating) stops

20 sets end measures 24, i.e. the value of the given coordinate. Rotating the chuck together with the machine spindle, using the indicator 25, set the screws 22 on the O. i.e. an equal distance from the center of the cartridge.

One stop is attached, the second is removed along with the end gauge. Coarse installation of the stop along the X axis with an accuracy of 0.3 mm is carried out on a scale on the plane of the cartridge.

Claims (1)

Invention Formula The turning two-jaw universal chuck, in the radial grooves of the case of which clamping cams are located, are associated with a screw with right and left threads and a groove, designed to interact with a fork, characterized in that, in order to expand technological capabilities, the cartridge is equipped with an axial mechanism move the plug, made in the form slats with wedge surfaces designed to interact with similar surfaces made on the plug and mounted in the housing so that the screw can rotate, while the cartridge is equipped with a cam movement mechanism together with the screw made in the form of the screw mounted in the housing, designed to interact with a serrated surface formed on the side surface of one of the cams. View 6 Fig.Z FIG. one 78 Fy gd 1B Fig. $ 12 13 VidD FIG. 6 Fig 8 ъ one