SU865569A1 - Tool head opening mechanism - Google Patents

Description

(54) GZHKHANISM DISCLOSURE OF INSTRUMENTAL

HEADS

The invention relates to a machine tool industry and can be used in machine tools for cutting or threading. Mechanisms are known for opening the inspection head with an internal spring device, the outer ring. “OM and groove on the latter, made in the 8th form of a rotary clamp, connected by means of levers with a control rod, and with a tool head — through the crackers pivoted for the ij. However, the known device has relatively low reliability and accuracy of processing. The purpose of the invention is to increase the reliability of the mechanism and the accuracy of processing. The goal is achieved by the fact that the crackers are installed in the groove of the outer ring of the tool head with the axial displacement force. Fig. 1 shows a thread processing machine with a tool head opening mechanism, a general view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2, the head is closed); 4 is the same (start opening the heads); in Fig.5 - also the Goldenhead is revealed. On the base 1 of the thread-processing machine, the headstock 2 is fixedly mounted, on the spindle of which there is an instrumental head 3. The carriage 4 with the clamping device 5 mounted on it for mounting and fixing the workpiece 6 is movably mounted on the bed 1 guides. 7, on the axis 8 of which a collar 9 is suspended, which encircles the head 3 and is connected to the outer ring 10 of the head with the help of two crackers 11 installed in the groove of the said outer ring of the head with the possibility axial movement. On the other hand, the collar 9 is connected by means of axles 12, 13 and earring 14 to a lever 15 fixedly mounted on a shaft 16 mounted in a bearing 17 of a bed 1. Lever 18 is fixedly fixed on the same shaft 16 with a handle 19 rigidly fixed to it connected with a finger 20 entering into its slot with a control rod 21,;

mounted with the possibility of axial movement in the supports 22 on the frame 1.

On the rod 21 is installed with the possibility of permutation stops 23 and 24, which are located on both sides of the bracket 25, fixedly mounted on the carriage 4 and provided with a hole (or groove) through which the bar 21 passes freely.

In the case of the tool head 3, there is a spring device for opening the heads, consisting of springs 26 with pushers 27, acting through the pins 28 on the cams of 29 g abutting the outer ring 10 of the head 3 and having the ability to rotate around the axis of their shanks.

The tool 30 (thread-cutting combs or thread rolling rollers) is attached to the cams 29.

The number of springs 26 with pushers 27 corresponds to the number of cams of the tool head (usually 35 pcs.).

The mechanism works as follows.

When moving the carriage 4 with the workpiece 6 forward, the thread is machined on the workpiece. The length of the thread to be machined is determined by the installation of the stop 23. At the end of the thread processing stroke, the carriage 4 with the bracket 25 presses the stop 23, moving the rod 21.

When this finger 20 rotates the lever 18 and through the shaft 16, the lever 15, the axis 12, 13 and the stud 14 rotates the clamp 9 and moves attached to the clamp crackers 11, installed in the groove of the outer ring 10 of the tool head 3.

When the crackers are moved to the left, a gap b is first selected between the crackers and the left side surface of the groove, and then the outer ring 10 of the head 3 begins to move relative to its body. The cams 29 continue to abut against the straight portion of the working surface in the outer ring 10 of the head 3 and the head 3 remain closed.

At the moment when the outer ring 10 is displaced by the breadcrumbs 11 at the beginning of the bevels of the working surface of the cams

29, the latter, under the action of the springs 26, with their bevels, immediately push the outer ring 10 of the head 3 to the left, choosing (in this case partially) a gap previously formed

5, between the right side surface of the groove and the bread crumbs 11, the thread-forming tool 30 is brought out and brought out of contact with the workpiece.

Claims (1)

Invention Formula The mechanism of opening the tool head with an internal spring device, an outer ring and a groove on the latter, made in the form of a rotary yoke connected by means of levers to the control rod, and to the tool head through crackers, hinged on the yoke, characterized in that reliability of the mechanism and accuracy of processing, 5 crackers are installed in the groove of the outer ring of the tool head with the possibility of axial movement. Sources of information taken into account in the examination 0 Manual for thread-cutting semiautomatic machine mod. 5D07, Chita Machine Tool Plant, 1972. l li l l 4 Bb b turned head closed L 10 Hz Z8 Fig.Z D: mSepHfffftff Head Opened bb rotated Start Uncover It 29 Fy 29 2c