SU1416274A1 - Milling head with adjusting end face finishing cutting edge - Google Patents

Abstract

The invention relates to the field of metal cutting, in particular to cutting tools. The purpose of the invention is to simplify the construction for a simpler use; Mechanisms for adjusting the position of the end finishing edge of the non-swiveling plate. In the housing there are grooves for the holders of the cutting plate with the end finishing edge. Each holder in its angular position has the ability to interact with two points of the rotatable mounting roller, which is made with a profiled support surface for interacting with one point of interaction and a cylindrical support surface for another point of interaction. From the axial movement in the guide groove, the setting roller is held by a flat spring. Before adjusting the face finishing cutting edge of the plate that is not to be tipped, parallel to the working surface in the angular position, its holder must interact with the setting roller at two points, and to adjust the axial position with the setting link, the stop planes of the installation roller at an angle to each other must be fit to the side surfaces of the guide groove. 6 hp f-ly, 7 ill. i (Л С

Description

The invention relates to a face milling head with an adjusting face | | hey finishing edge for machining - metals consisting of a main body, around the circumference of which axially set I are laid in the axi-axially receiving grooves; Fixed cutting plate holders, each cutting blade holder that contains a cutting blade and a finishing blade with a face finishing edge radially adjoins with the possibility of adjustment in its angular position at two points of abutment of the rotating adjusting roller.

I For frontal milling, circumferential p | cutting edges, acting as the main cutting edge, and frontal cutting edges, acting as auxiliary cutting edges, create machined bottom surface of the workpiece. At the same time, there are curved traces of influence: E | and, which are irregularities E | treated surface. In order to ensure the occurrence of such traces of impact, to obtain a less rough surface, one or a few cutting plates with a face (spruce cutting edge) are used on the face milling heads. The quality of the surface achieved by this depends on the basic dT position of the face numerical edge cut to the working plane; 1). This means that the angular position of the face finishing cutting edge must be adjusted using suitable mounting elements, such as because of the tolerances on and preparing cutting plates and cutting plate holders required accuracy is difficult to achieve without the use of mounting elements.

A face milling head is known in which the adjustment of the angular position of the face finishing cutting edge is achieved by turning the support plate. The insert holder is positioned in the α-axially directed receiving groove of the main body and is axially and radially adjustable through the setting roller. For adjusting the angular position of the end finishing edge, the rear portion of the insert holder rests on the annular spring element in an adjustable manner. This ring-shaped

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A spring element having a side slot is located in the trapezoid, on the radial side of the abutment of the open recess of the support plate.

With one side of the spring formed through the side slot, the spring element abuts against the abutment. On the other side of the spring, the adjusting screw acts, and the spring element expands. In connection with this, the size on which the spring element protrudes through the radial adjacent side is changed, since the holder of the cutting insert is rotated together with the cutting insert. Accurate establishment is possible through this spring element, but the cost of manufacturing is still very high. Radial installation can disappear when using one or two cutting plates with an end finishing cutting edge, since the end finishing cutting edges, as a result of their width, overlap several feeds per tooth (GDR patent No. 199419, cl. B 23 C 5/20, 1975).

A face milling head is known in which one or several cutting inserts are provided with an face finishing cutting edge. Each of them is attached to the holder of the cutting insert, which is designed as a spring arm and is fixed in a draw on the front side of the milling head with a clamping screw. Between the cutting plate and the clamping screw, the holder of the cutting plate is slotted to reduce the cross section. The yctaHOBKA cutting plate is guided by a mounting element positioned behind the holder of the cutting insert.

In one exemplary embodiment, the adjusting element is an eccentric disk with a hexagon inscribed. This eccentric disk is controlled by a 1 hex allen key, which is held

50 through radial drilling of the main body. By turning the eccentric disk, the holder of the cutting plate will be bent and thus the absence of an axial bevel55 will be established or the protrusion of the face finishing edge will be installed over the rough cutting edges. Since the holder of the cutting plate after us0

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The shafts are not tightened once more;

The disadvantage is that when face milling with the set cutting edges can not be used head diameter, as the face finishing edges are placed on a smaller diameter than the rough cutting edges, and that separate cutting edges should be provided in the milling head. removals for cutting insert holders, for finishing inserts. With such an arrangement of the cutting plates, the face finishing cutting edges must be made arcuate, because of which the treated surface has a wavy profile (German Patent No. 2615913, class B 23 C 5/20, 1977).

The purpose of the invention is to simplify the design due to the simpler use of the mechanism for adjusting the position of the face finishing cutting edge of the plate that is not to be turned.

The basis of the invention is to improve the swivel setting roller on the end heads with the setting end face edge, in which each holder of the cutting plate lies in its angular position by two points to the setting roller. According to the invention, this task is accomplished in such a way that the setting roller is with a profiled support surface for one point of contact with the holder and a cylindrical support surface for a shank point.

An installation roller with two profiled support surfaces is also performed, one of which is offset from the other by half the cam. The adjusting roller is placed in the V-groove of the main body rotatably, but without axial movement due to the flat spring which is screwed to the body.

On the profiled support surface of the installation roller, two support flats are made, corresponding to the southern groove for determining the zero position of the E1; - roller, In the holder of the cutout n. The iac of the gina is made with the hole in which the pin of the pre-g is located;

surface on which the screw provided with the holder with a tapered tip acts. This pin rests on one wall of the receiving groove and presses against the holder against the other wall of the groove, due to which the holder of the cutting insert will be pre-fixed for more precise installation. For the axial mounting of the insert holder, an adjusting link is placed on its back side.

The installation of the face finishing cutting edges of the tool for milling —.can be carried out by the adjusting device if the clean milling head is located on the spindle of the milling machine, or outside the mill freewheel. Since installation on a milling machine is inconvenient, and because of the rationalization of the technological process, it would be preferable to use an installation device for installation. The installation work carried out in both cases is equal. Initially, the holder of the cutting plate is placed in the receiving groove in such a way that with its contact points it is adjacent to the adjusting links. Then the holder will be preloaded on the pin and pre-set by turning the adjusting screw with a tapered tip. This preload can be created with a clamping wedge. After that, the cutting plate with the face finishing cutting edge is installed in the recess of the holder with a positive fit, and it should be brought to a stable position at three points of abutment.

The special design of the installation roller has various advantages over the known structures. An essential of these is that the installation roller forms two fixed points at each position and has high wear resistance.

Fig. 1 shows the face milling head with the adjusting face finishing edge, side view; FIG. 2 is an enlarged partial side view in section L-A of FIG. 1; fig. 3 is an enlarged partial top view of the face milling r-tin in the installation area 5

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the roller in section bb in fig. 2;

in fig. 4 is an enlarged partial top view of the face, milling head in the area of the installation roller in section BB in FIG. 2; in fig. 5 is a partial top view of the face milling head in section G-D in FIG. 2; in fig. 6 is a partial top view of the face milling head in section DD in FIG. 2; in fig. 7 -; plow embodiment of the invention for the setting roller

The end milling rod consists of the main body 1, which is equipped along its perimeter, in accordance with the number of provided positions of the cutting elements, of axially directed receiving grooves 2 ,. which are closed behind the locking ring 3 in the rear. In one or several receiving grooves 2 there is one holder of the cutting plate 4 with a flush-mounted rotating cutting edge 6, a tight wedge 7 and tension The joint 8, which acts on the cross nut, is placed in the hole 9 of the main body 1.

The cutting insert holder 4 has two points of contact 10 and 11, which & 1 and it is radially adjustable in abutment in its angular position on the profiled bearing surface 13 and the cylindrical bearing surface 14 of the setting roller 12. At this point, the touch point 10 may lie adjacent to the cylindrical bearing surface 14, and the point of tangency 11 to the profiled support surface 13, or the point of tangency 10 may lie adjacent to the profiled support surface 13, and the point of tangency 11 to the cylindrical support surface 14,

The setting roller 12 may also be equipped with two profiled support surfaces 13 and 15. In this case, to achieve a pivotal movement, the profiled support surface 13 is rotated as compared to the profiled support surface 15 by half a cam. The adjusting roller 12 is placed in a V-shaped guide groove 16 in the main body 1 and keeps from moving in the axial direction

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with a flat spring

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fastened with screw 18 in the main housing 1.

The profiled bearing surface 13 or 15 has two locking planes 19 and 20 located at an angle to each other corresponding to the angle of the guide groove 16 so that

The 1Q zero position, and whose locking planes 19 and 20 are adjacent to the sides of the V-shaped guide groove, will be found without difficulty. To set the angular position of the end face of the 15 cut edge, the insert holder is pretensioned with a pre-pin. body tension 24 with a wedge plane 23, which acts

2Q setscrew with a tapered tip, in the receiving groove 2. The pin of the preliminary tension 24 is supported in the transverse hole 21 of the holder of the cutting plate 4 and rests against the walls

25 26 of the receiving groove 2. To install the holder of the cutting plate 4 in the axial direction / 1enie, the installation link 25 is located at its reverse side.

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The installation of the face finishing cutting edge 6 is preferably carried out in a mounting device in which the face milling head is fastened as on a mill spindle. ka Then the holder plate

4 is installed in the rim groove 2 of the main body 1 so that it lies adjacent to the cylindrical support surface 14, the fitting point 11 to the profiled support surface 13 and the adjusting link 25 to the retaining ring 3, and the adjusting roller 12 is rotated to this position wherein the locking planes 19 and 20 of the profiled support surface 13 of the setting roller 12 abut against the side surfaces of the V-shaped guide groove 16.

By tightening the tension screw with the conic tip 22 by means of the pre-tensioning pin 24, the holder of the cutting plate 4 is inserted into the receiving groove 2 and then the cutting plate with the face finishing edge 6 is inserted into the recess

5 of the holder of the cutting plate 4 and also slightly pre-tightened with the help of the tension wedge 7,

. The ocular mesh of the measuring loupe is adjusted so that its strokes run exactly parallel to the working plane of the face milling head, exactly perpendicular to the turning axis of the instrument. By turning to the right (Figs. 3 and 4) to simplify the design, the installation roller 12 of the cutter holder is designed as a roller with

Due to the increasing diameter of the profiled support surface 13, a radially directed rotational movement around the cylindrical support surface 14 is produced with a cutting plate 4, and the angular position of the end finishing cutting edge 6 also changes relative to the working surface. The adjusting roller is rotated until the edge clean cutting edge 6 runs exactly parallel to the grooves of the ocular net and thus parallel to the working surface.

In a similar way, all other holders of the cutting plates 4 are installed and adjusted in the receiving grooves 2 of the main body 1,

Claims (7)

After all the cutting inserts 4 with face finishing cutting edges 6 are installed exactly parallel to the working surface, by rotating the adjusting link 25 s. using the corresponding key, each holder with the cutting plate 4 is moved along the axis in the receiving groove 2 so that all the face finishing cutting edges 6 of the end milling head lie on the fig shown in fig. 1 and 2 by the dash-dotted line of the working surface, or each end clean cutting edge 6, is brought one after another to coincide with one and the same with the stroke of the ocular grid of the measuring loupe. In this adjusted position, the cutting plate 4 with the holder is secured with a tension wedge 7. Invention formula 1. A milling head with the adjusting face fair cutting edge -. two support surfaces designed to interact with the cutting insert holder. 15 2. A milling head according to claim 1, which is distinct from the fact that the bearing surfaces of the roller are made one cylindrical, and the other is profiled. 2Q 3. A milling head according to claim 1, characterized in that the bearing surfaces of the roller are made profiled with the profile offset relative to each other. 25 4. The milling head according to claim 1, which is distinctive with. that the roller is housed in a V-shaped guide groove made in the housing and is kept from axial movement 3Q inserted into the milling head with a flat spring. 5. Milling head on PP. 1-4, 35 The profiled surface of the roller has two stop flats at an angle to one another, Corresponding to the angle of the guide V-shaped groove. 40 6. Milling head on PP. 1-5, characterized in that The cutting plate holder has a transverse hole in which a pre-tensioning pin inserted into the head is placed with a wedge surface designed to interact with the conical surface of the tongue inserted into the milling head placed in the holding body. 7. A milling head according to claims 1-6, characterized in that it is provided with an installation link for axial adjustment of the holder of the cutting blade. 50 Coy, containing the body, whose circumference is axially directed; the grooves are fixed holders of the cutting plates with a mounting element designed to adjust their angular position and installed with the possibility of rotation, characterized in that two support surfaces designed to interact with the cutting insert holder. 2. A milling head according to claim 1, which is distinct from the fact that the bearing surfaces of the roller are made one cylindrical, and the other is profiled. 3. A milling head according to claim 1, characterized in that the bearing surfaces of the roller are made profiled with the profile offset relative to each other. 4. The milling head according to claim 1, which deals with the topic. that the roller is housed in a V-shaped guide groove made in the housing and is held away from the axial movement introduced into the milling head with a flat spring. 5. Milling head on PP. 1-4, 35 The profiled surface of the roller has two stop flats at an angle to one another, Corresponding to the angle of the guide V-shaped groove. 6. Milling head on PP. 1-5, characterized in that The cutting plate holder has a transverse hole in which a pretensioning pin inserted into the head is placed with a wedge surface designed to interact with the conical surface of the tongue inserted into the milling head placed in the holder. 7. A milling head according to claims 1-6, characterized in that it is provided with an installation link for axial adjustment of the holder of the cutting blade. and / j five 2B (rig. 6-6 SrigZ YYY c-fjue.5 in the Yu /four 76 71 2 voye.6