SU1303272A1 - Tailstock for metal-cutting machine - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in machine tools for machining parts such as shafts operating in an automatic cycle. The aim of the invention is to increase the productivity by automating the process of setting up the device for determining the position of the pin. The head contains a body 1, a quill 2 with a supporting center 4 and a mechanism 3 for its movement, a device for determining the position of the quill with cams and limit switches. The device for determining the position of the quill is made in the form of a rod 6 fixed to the quill 2 with a cam 7 and a carriage 8 with a mechanism for moving it. At the same time, the carriage 8 moves along the rod 6 with the possibility of interaction of the limit switches 9 and .10 installed on the carriage 8 with cams, one of which 13 is located on the body 1 of the tailstock and the other 7 on the rod 6. 7 Il. (L phi.1

Description

one

The invention relates to a machine tool industry and can be used in machine tools for machining parts such as shafts operating in an automatic cycle.

The chain of invention is to increase productivity by automating the tuning process.

Figure 1 shows the tailstock

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3 movement of the quill 2. The quill 2 with the rod 6 is moved to the left (FIG. 3). Centers 4 and 5 enter the center holes of the reference part and clamp it. This moment is controlled by the operation of the pressure switch 15.

Then, the engine 12 is turned on for reverse and the carriage 8 along the rod 6 is moved to the right until the interaction of the metal-cutting machine in the initial position of the TO 7 with the limit switch 10 is applied; figure 2 - the same, with nastProsli engine 12 is turned off (figure 4). This completes the setup of the device for determining the position of the quill. Quinol 2 is rejected.

A device for determining the pinopi position; fig. 3 - the same when completing the adjustment of the device for determining the position of the quill; figure 4 - the same, with the initial position of the carriage; fig.Z - the same, when installing the workpiece in the centers with a skew; FIG. 6 is the same when installing the workpiece in centers with a size of L smaller than U; 7 - when installed in the centers of the workpiece, the length of which is significantly less than the length of the other.

The tailstock of the cutting machine includes a body 1, a quill 2 with a mechanism 3 for moving it to clamp the workpiece in centers 4 and 5, a rod 6 fixed on quill 2 and equipped with a cam 7, a carriage 8 with limit switches 9 and 10, a mechanism 11 carriage B moves with the motor 12, the cam 13 and the limit switch 14 mounted on the tailstock housing, as well as the pressure relay 15.

The backstock of a metal cutting machine works as follows.

Before processing a batch of blanks, the device is configured to determine the position of the quill.

The adjustment is made to control the center-to-center distance L over the reference part remotely from the machine control panel.

At the beginning of the adjustment (Fig. 1), the quill 2 is in the initial (far right) position, which is controlled by the interaction of the cam 7 with the limit switch 14. The reference part is installed in the zone of action of the centers 4 and 5.

 The inclusion of the engine 12, the carriage 8 is moved along the rod 6 to the leftmost position: Tae (figure 2). The interaction of the limit switch 9 with the cam 13 gives the command to turn off the engine 12 and stop the carriage 8 and at the same time to turn on the mechanism

tO lacha 7 with limit switch 10,

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thirty

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After that, the engine 12 is turned off (figure 4). This completes the setup of the device for determining the position of the quill. The quill 2 is retracted to its initial position (Fig. 1), after which the entire batch of blanks is processed. In this case, the interaction of the cam 7 with the limit switch 14 gives a command to place the workpiece in the zone of action of the centers.

As soon as the workpiece is installed in the center zone, the mechanism 3 for moving the quill 2 is turned on, which moves to the left. Together with the quill, the rod 6 is moved with the cam 7. The carriage 8 remains in place during the processing of the entire batch of parts.

If (figure 4) when installing the workpiece in the centers, the center-to-center distance is within the tolerance of size L, then the cam 7 interacts with the end switch 10. The pressure relay 15 triggers, indicating that the workpiece is clamped. With these two

35 signals the tool supply is permitted.

If one of the center holes or both is missing in the workpiece, and also if the workpiece is installed at misaligned centers (Fig. 5), then the distance between centers 4 and 5 is greater than the allowable distance L, i.e. B + d In this case, the interaction of the cam 7 with the limit switch 10 does not occur, and therefore, the signal to the instrument actuator is not supplied.

If, when the workpiece is installed in the centers, the distance to the center of centers 4 and 5 is less than the allowable distance L, i.e. L-U (Fig.6), the cam 7 interacts with the limit switch 9, which eliminates the supply of the tool to the workpiece.

When processing the workpiece, the length of the tail is much smaller than the length of the others (although it is difficult to visually determine) (Fig. 7), the quill 2 moves to the left until it stops. As a result, the pressure relay 15 is activated, indicating that the workpiece is clamped. When this cam 7 interacts with the limit switch 10, which indicates the correct installation of the workpiece. However, at the same time, the interaction of the limit switch 9 with the cam 13 also occurs, and in the automatic mode of the machine, the control of the machine is turned off. Thus, the signal to bring the tool to the workpiece is not supplied.

After completion of the processing of the workpiece, a command is issued to retract the quillies to the starting position until the cam 7 is engaged with the end switch 14. Then the process is repeated.

Claims (1)

The invention of the back head of the metal-cutting machine, comprising a housing, a quill with a supporting center, a quill movement mechanism, a device for determining the position of the quill with limit switches and cams, one of which is fixed to the hume of the tailstock, characterized in that by automating the adjustment process, the device for determining the position of the quill is made in the form of a rod with a cam attached to the quill and a carriage with a mechanism for moving it along the rod, nye switches mounted on the carriage to cooperate with the cams, one of which is disposed on the tailstock housing and the other - on the rod. Fi.g (rig. 3 Phie. (. five SB 1l l ya t AND 7 i-l to//. fi.6 15 13 Fie.7 Editor A. Ogar Order 1248/12 Compiled by G. Barin ov Tehred L. Serdyukova Proofreader A.Obruchar Circulation 976 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhgorod, Projecto st., 4