SU34435A1 - Lathe with rolling tool holders - Google Patents

Description

Already, it is known to use turning, especially automatic, machines for swinging tool holders in order to feed individual cutters to the workpiece to be machined. . as a general rule, so far only three such swinging toolholders have been used. With a large number of them, they would partially overlap one another, M1shali 5y-to each other and make

would be insufficiently accessible every

cutter. However, in many cases the same; In addition, the present invention is intended to accomplish this task by placing the shaft of one tool holder in the shaft cavity of the other holder, the geometric axes of the shaft of the holders coinciding. - i

In FIG. 1 depicts the view

,; the shoulders of the toolholders in the direction of the axis of the workpiece; FIG. 2t "Id in front of the essential" Astey mashin1e1, with a partial section; FIG. section along the length of AB in FIG. 2; FIG. (541)

the effect of two belonging to the same swing axis of the incisors on the workpiece; FIG. 5 is a front view, in partial section, of a different kind of installation of individual parts; phi1-, b- section along the line CD in fig. 2 on an enlarged scale; FIG. 7 is a section along the EF line in FIG. b.

For the three cutters 7, 2, J (Fig. 1), three special lever-shaped tool holders 4, 5 and 6 are provided, which can swing about the shafts 7, 5 and P.

According to the invention, it is arranged only for One cutter / / additional holder / 2, rotating around the same

shaft P and being able to move along the latter, and, if necessary, move away from this axis.

The holder / 2 (fig. 2) is fixed on

shaft P and can be c. swinging in such a way that the shaft P is rotated with the help of a tooth segment (5) fixed on it and teeth / a roller lever 75 (Fig. 3). The latter is in contact with one of its ends with the J6 distributive washer

shaft 77. The hollow shaft 18 of the tool holders 6 serves as a bearing for the shaft I, and so is located in the frame 19, which cannot: axially move. It is also provided with a toothed segment 20, with which the teeth 21 of the roller lever 22, which is under the influence of the curvilinear washer 25, engage.

By the action of curvilinear washers 16 and 23 on rollers of chords 15 and 22, the tool holders 72 are used, they are examined as needed, so that the cutters 77 and 5 approach the JO object being processed,

If the cutter 77 has to be turned, which makes longitudinal turning, and the tool 3 serves as a cut-off |) cutter, then the required longitudinal movement of the tool 77 is achieved by, n, then the swing shaft 9 carrying the tool holder 72 is made displaceable in the hollow shaft 78 of the tool holder 6. For this purpose, a shaft 24 has a sleeve 24 on which a double lever 26 swinging around a stationary axle 25 acts, its second shoulder walking along the curved surface of the drum 27 reinforced also on the camshaft 77. For reverse swing of the lever 26 serves as a tension P gun 28.

The advancement of the shaft 9 can be limited to an annular stop 28 (FIG. 2), which M9t can be fixed in a removable manner on the trunnion 29 at one of the ends of the shaft 9. This stop 28 belongs to the sleeve 30, which can be turned by the other end, so that with this rotation in the position of FIG. 5, the shaft 72, and with it the holder 72 comes to a position where only radial rolling movement is possible, the axial displacement is impossible, and the double lever 26 goes beyond the limits of the curved surface 27. For the holder 72 with a cutter 77 (Fig. 2 and 5) there is a relatively small space between the holder 6 and the cutter 3, on the one hand, and the normally existing, active machined objects in your axis along its axis, the cutters and their toolholders.

In order that the cutter 77 could be replaced without releasing the holder 72 on the shaft P and, therefore, changing its position is advisable (Fig. 6 and 7) to do part 52

(Fig. 6) removable c. holder 72. With its purpose, part 52 consists of an axle box with a shoulder 55 and an internal thread .5 with which the retaining bolt 5.5 engages with a flat head 55. The latter can lie in a corresponding recess in the holder 72 in the place of reinforcement. It is useful to make cutting, as seen in the drawing, cuttings in some places, exactly the same as cutting inside part 52, so that parts 32 and 35 can be quickly inserted and removed from holder 72- Then, after inserting both parts in non-abrasive sections, only a part of the rotation is sufficient to ensure that the thread is tightly zero; in the same way, only a short reverse rotation is sufficient to remove the cut sections from the clutch, after which parts 1-5 can be easily removed in the axial direction.

The device, holding the tool in the charti 52, the scraper to be made in any form, adapted to the cutter 77, for example, with a clamping screw 57 (Fig. 7).

The replaceable part 52 can be made moving in the holder 72 by rotation. For this purpose, in two ways, by corresponding recesses, two planes of abutment 38, 39 were created, which are driven by two 72 screws and 40 screws 47 screwed into the cut holes of the holder, however, so that the tension of one screw produces a torque on part 52 other direction than the tension of another screw.

A device serving for movement (the levers of the tool holders can also be carried out in a rude way, and not in the one described and shown in the drawing.

The invention is applicable also in those cases when not all tools placed in the arms are cutting tools. For example, one of the levers could support a stop or grip, which serves to transfer the product processed by the device to another processing point, for example, to cut a slot in the head of a bolt to drill one OR; a few holes or that would cut the internal cutting in the pre-drilled and cut the nut, etc.

By positioning the two tool holders on one swing shaft 9, which is quite feasible, depending on the shape of the workpiece and the number of tools needed, and in relation to the remaining swing axes 7 and 8, a compact and economical location is possible, a large number of tool holders and cutters without tools interfering with each other’s work or with easy accessibility and easy installation.

The subject of the patent.

A lathe with swinging tool holders, characterized in that the shaft 9 of the toolholder / 2, having a common geometrical axis with the shaft of the toolholder 6, is passed through the hollow shaft / (the latter, moreover, in order to realize the longitudinal turning of the tool 7 / holder / 2, the shaft P can be reported axial movement, limited to wear at its end of the ring with a different stop 25 with a sleeve 30, the length of which corresponds to the value of the longitudinal turning.