SU1743709A1 - Automatic inserted blade milling cutter - Google Patents

Abstract

Using; for boring holes, for example in cylinder blocks. SUMMARY OF THE INVENTION: The cutter head comprises a housing 1 with radial cylindrical bores 4, in which plungers 6 with cutters 10 are mounted. For supplying a coolant fluid to the plungers in the housing under pressure

Description

The invention relates to metal cutting and can be used for boring holes, for example, in cylinder blocks.

The purpose of the invention is to simplify the design and improve processing accuracy.

Figure 1 shows the incisal head, a general view; FIG. 2 is a view A of FIG. 1; on fig.Z - section bb in fig, 1; figure 4 - section bb In figure 1; figure 5 - the mechanism of removal of plungers to its original position.

The cutting head includes a housing 1 with a tapered shank 2 and a fastening thread 3. The housing has uniformly spaced radial cylindrical holes 4 and a central channel 5 intersecting with them, designed to supply coolant under pressure. In the radial holes 4, plungers 6 of cylindrical shape are mounted with the possibility of axial movement, on which annular protrusions 7 are made with flats 8 and beveled ends 9. Cutters 10 are fixed in the plungers.

The cutting head contains a mechanism for micrometric adjustment of plungers with cutters to the size of processing, made in the form of a cup 11 mounted on the outer surface of the body 1 with longitudinal windows 12, in which the pads 13 are fixed with longitudinal grooves 14 and beveled flat surfaces 15, designed to interact respectively with bald 8 and beveled ends 9 on the annular ledges 7 plungers. A nut 16 is installed in the axial hole of the cup, which is connected to it rotatably and fixedly from axial movement of the half-rings 17. A cover 18 with a micrometer screw 19, which is connected to the nut 16, is fixed to the end of the body. A ball lock is installed in the radial hole of the cup 20, designed to interact with sockets made on the nut. On the nut 16

installed with the possibility of rotation and fixation in the desired angular position of the limb 21. The head is also equipped with a mechanism for retracting the plungers to the initial position, made in the form of extension springs 22, with one end pivotally connected to the plunger and the other between them. This connection can be made, for example, by means of pins 23 and rings 24 installed in the plungers. The cutters 10 are fixed in the plungers by means of wedge mechanisms.

For fixing the cutting head when screwing the housing 1 into the spindle serves

lock nut 25.

Cutting head after installation in the spindle of the boring machine works as follows.

In the initial position, the cylindrical plungers 6 with the cutters 10 under the action of the springs 22 are retracted from the surface to the stop with annular projections 7 in the housing 1.

When applying coolant to the central channel 5

under a given pressure, the plungers 6, overcoming the force of the springs 22, move in the radial direction until the beveled ends 9 are pressed against the beveled surfaces 15 of the pads 13, resulting in

the cutters 10 are advanced to a predetermined size of the workpiece.

Upon completion of the working passage, as soon as the fluid pressure in the cavity of the head housing 1 decreases, the plungers 6 with cutters 10 under the action of the springs 22 are retracted from the cylinder surface to the initial position, after which the spindle is quickly withdrawn from the part to the initial position. Innings

The coolant in the cutting zone is provided by making the jet holes in the plungers. In this case, the coolant through channel 5 should be redundant and provide for the flow of coolant through all of the orifice holes in the plungers (not shown). As the incisors wear out, the head is adjusted using dial 21. When rotating the nut 16c, the cup 11 moves with the pads 13, which, interacting with the beveled surfaces 15 with the bevels 9 at the ends of the projections 7, change the end positions of the plungers after applying the coolant under pressure.

Claims (1)

The invention includes an automatic cutting head comprising a housing with radial holes evenly spaced around and intersecting with a channel for supplying coolant with pressure, installed in radial holes with the possibility of axial displacement and plungers fixed from rotation. with incisors, the mechanism of micrometric adjustment of plungers with incisors on the size of processing, including the limb, and the mechanism for retracting the plungers to the initial position, characterized in that In order to simplify the design and improve processing accuracy, the radial holes in the housing and plungers are cylindrical in shape, the plungers are made with annular projections with beveled ends and flips, and the micrometric adjustment mechanism is designed as an axially mounted glass with longitudinal windows placed in pads attached to the glass with longitudinal grooves and beveled flat surfaces designed to interact with the flats, respectively, and beveled the ends on the annular protrusions of the plungers connected to the cup so that they can be rotated and fixed from axial movement of the nut fixed on the end of the lid body with a micrometer screw in connection with the nut and mounted in the glass of a ball retainer designed to interact with nut sockets, while the limb is mounted on the nut with the possibility of rotation and fixation in the required angular position, and the mechanism for withdrawing the plungers is made in the form of tension springs, with just the ends of the hinges connected to the plungers, and others to each other. Phage2 eleven 13 FIG L 21 Fig.Z