SU1154051A1 - Tailstock of metal-cutting machine - Google Patents

Abstract

1. REAR VLPKA MACHINE-SLIPPING MACHINE, having a body, a pnol with a center, mechanics of repairing the quill and controlling the position of the rear center, characterized in that, if you try to do it n-adozhnostk work, MSHPG coit-. Role position: 1a, cie tse} | tt) and installed on the housing with. Royomozhnos gyu perticum

Description

The invention relates to a machine tool industry and can be used in machine tools for processing details of the type of shafts operating in an automatic cycle. A known tailstock of a metal cutting machine, comprising a housing, a center with a center, a quill movement mechanism and a device for controlling the position of the rear center. The tailstock provides control of the rear center in the price hole 1 3 However, the control is carried out with the help of a pneumatic device, for which there is an air supply channel at the end of the rear center. During operation, the rear cent is weakened by the channel, deformed, and the channel itself is clogged with chips or other on, and the air partially or completely does not pass into the channel. As a result, the machine control unit receives a wrong signal, which creates an emergency situation. The wrong signal also comes when the rear center hits the center hole, which is not made at full depth. In this case, the depth of the centering hole is quite sufficient to close the air supply channel in the rear center, but not sufficient to properly install the part. In addition, the known device does not allow the use of a standard rotating center, since the pneumatic control device requires an absolute absence of leaks, which cannot be ruled out by rotating the center. The aim of the invention is to increase its reliability in operation. This goal is achieved by the fact that in the tailstock of a cutting machine that includes a body, a quill with a center, mechanisms for moving the quill and controlling the position of its center, the mechanism for controlling the posterior center is installed on the body with the possibility of vertical and horizontal movements and is designed as a spring-loaded Plates with a rail and a groove, a final switch and a pinion shaft that is installed with the ability to interact with one end with the rail and the other with the final switch. Moreover, the mechanism for controlling the position of the rear center is placed in the casing introduced into the tailstock. FIG. 1 shows the tailstock, general view; in fig. 2 is a view A of FIG. one; in fig. 3-5 - rear headstock when correctly installed parts in the zone of action of the rear center; in fig. 6 - the same, if the part is incorrectly installed (skewed). The tailstock of a metal cutting machine includes a body 1, a quill 2 with a center 3, a mechanism for moving the quill 4 (Figs. 1 and 2). On the body of the tailstock 1, a bracket 5 is installed with the possibility of horizontal movement along the guides 6 by the cylinder 7. On the bracket 5 there is installed a casing 8 with the possibility of vertical movement along the guides 9 of the cylinder 10. In the casing 8 the guides 11 are mounted with the ability of the strips 12 to move along them formed with a rail 13 and a groove 14, a spring 15 mounted between the strap 12 and the casing 8 and designed to hold the strap in the initial position, the shaft-gear 16, on the opposite end of which is fixed a flag 17 with the possibility of Interaction of a co-finitely switch 18. The workpiece 19 formed therein with a center bore 20, installed in the rear center lena coverage area. The backstock of a metal cutting machine works as follows. At the beginning of operation, the device for controlling the position of the rear center is, for example, below the axis of the rear center (Fig. 1). The workpiece 19, having been installed I, is poured in the zone of action of the rear center 3. The control device with the help of a cylinder 10 rises up and stops in front of the tailstock quill 2 by means of a cylinder 10. At this point, the apex of the cone of the rear center is in the same plane with the end of the bar 12, which faces the part (Fig. 3). Then, using the cylinder 4, the tailstock quill 2 is moved to the left, moving the device to control the position of the rear center. 3 When the part 19 is correctly installed (Fig. 4), the rear center 3 enters the centering hole 20, and the strap 12 rests against the end of the part, and moving along the guides 11 to the right, compresses the spring 15 and turns the gear shaft 16, which presses mounted on its opposite end by a flag 17 to the limit switch 18. A signal is issued that the rear center 3 enters the center hole 20 and the tool feed is allowed. At the same time, a command is issued to retract the device controlling the position of the rear center. For this, the vertical displacement cylinder 10 is turned on and the device is lowered. At the same time, the bar 12 and the shaft 16 are returned by the spring 15 to the initial position, and the cylinder 7 moves the device to the right, returning it to the initial position (Fig. 5). If for any reason (skewed part, lack of center hole, center hole is not made at full depth), the rear center 3 does not fall into center hole 20 of part 19 (Fig. 6), but rests, for example, on the end of part, This strap 12 does not move and does not allow the flag 17 to press the limit switch 18 and give a signal to supply the tool. Thus, the proposed technical solution ensures reliable operation of the tailstock of the cutting machine by replacing the pneumatic device for monitoring the rear center position with a mechanical one and installing it on the body of the tailstock. In addition, technological capabilities are expanded by using a standard rotating center that allows machining of parts not only on grinding machines, but also on lathes, and to process heavy parts.

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Claims (2)

¢ 54) 1. REAR BATTERY. METAL-CUTTING MACHINE, having a body, a center pin, mechanisms for moving the base and control the position of the rear center, characterized in that, with a stump of increasing its reliability in operation, the copt mechanism, the role of the position the rear center is mounted on the housing with the possibility of vertical and horizontal movements and is made in the form of a spring-loaded bar with a rail and a groove, a limit switch and a pinion shaft, installed with the possibility of interaction with one end with the rail and the other with the limit switch. 2. The tailstock according to claim 1, with the exception that the mechanism for controlling the position of the back center is located in the casing inserted into the tailstock.