RO119595B1 - Shank-type mill provided with mechanical mounted plates - Google Patents

Abstract

The invention relates to a set of shank-type mills, provided with removable, dismountable, resharpened cutters, said mills being used for processing the reconstituted wood, veneered chip board, melamine coated chip board, fibre board, with the help of the milling machines with upper axle or with numerical command. The mill consists of a central body (1) continuin with a tail (2) which is mounted in the tool holder head of the machine-tool, the central body having square shaped removable plates (3), made up of metallic carbides, disposed thereon in stagered planes, the central body (1) having practiced on its external surface, diametrally opposed, some special cutting-outs (a) centrally provided with central threaded recesses (b), which receive a special screw (4) for mounting the plates (3), the cutting-out being continued with a channel (c), both the cutting-out (a) and the channel (b) receiving and supporting the plate (3) successively resharpened (3.1, 3.2, 3.3 and 3.4), and on the opposite diameter, on the diameter of cutting-out (a) of the body (1), there are practiced some levels (d) opposite to one another.

Description

The invention relates to a set of tail mills, provided with removable plates, reassembled, mills that are used for the processing of reconstituted lumber veneered lumber, melamine lumber, PAF, with the help of milling machines with a higher axis or numerical control.

In view of the processing on the edge, of the reconstructed wood, the milling in curved lines on the outline of the veneered PAL, the melaminated PAL, the PAF, are known the cutters with tail, with removable plates. These removable plates, rectangular or square, made of sintered metal carbides, are placed alternately, on planes moved on the body of the mill.

During processing, the most requested wear area is the one that comes in contact with the adhesive film. To extend the service life, the plates are rotated periodically until the two, respectively the four edges, allow a good sharpening, after which the plates are removed from use.

The disadvantage of this mode of use is that the mills thus made have a reduced durability, due to the relatively rapid degradation of the cutting part, the consumption of removable plates being high.

Also known are the tail mills with removable diamond plates. The disadvantage of this milling method, besides the known good durability is the sensitivity to the metal particles included in the PAL respectively their high cost, which does not allow their use for the processing of the reconstituted wood.

The problem solved by the invention is to make a set of cutters with tail, for the processing of the reconstituted wood, using re-used used plates, thus choosing the constructive elements and their geometry, so that the same range of plates with good durability is used.

The tail mill, provided with reassembled removable plates, removes the disadvantages of known mills, by using rationally re-fitted plates in rationally set dimensional steps, plates that are grouped in their place, the place that is in a functional relationship with the diameter and the diameter. reshaped, giving superior durability to the cutting edge.

By using the milling cutters, according to the invention, a size of the life of the plates is obtained, with the improvement of the geometrical parameters of the tool.

In the following, an embodiment of the invention with reference to FIG. 1 ... 5 which represents:

FIG. 1, view of an interchangeable plate, at the initial type value, in use state;

FIG. 2, the view of a removable plate of metallic carbides, after use with the representation of the dimensional restocking stages;

FIG. 3, a view of the removable plates, of metallic carbides in the various dimensional stages, obtained after the resuscitation phases;

FIG. 4, a view of the milling machine in the different phases, having mounted the cutting plates from the different phases of the dimensional steps, after reassembling them, according to fig.2;

FIG. 5, cross section following line A-A through a tail mill, having a set of plates after one of the re-fitting phases.

According to the invention, the A-shaped milling cutter, provided with mechanically fixed removable plates, is constituted by a central body 1 which is continued by a tail 2 which is fixed to the tool-head of the machine tool.

The central body 1 carrying some removable plates 3 of metal carbides, mechanically fixed therein, having an initial diameter D is practiced on its outer surface,

RO 119595 Β1 diametrically opposed, each with a special cut - centrally provided with a threaded b, 1 cut which is continued with a channel c, and diametrically opposite perpendicular to the diameter of the cutouts has some recesses d opposite each other, at distances equal to 3 center of body 1.

in order to reuse the plates 3, used as a result of the processing carried out, plates that 5 have a square shape with the initial side I, after repeated refills, respectively, up to four refills, they are mounted successively on some mills Α _υ Aj, A; ,, A «Provided with a central body 7,1,1.2,1.3,1.4 with the outer diameter D _v D ₂ , D ₃ , D ₄ descending with a fixed dimension x multiplied by a multiple of 2, compared to the diameter D of the initial mill A, dimension which is required by 9 the reduction of the first side I of the initial plate 3 resulting in some plates 3.1, 3.2.3, 3.3.3.4, the sides of which have been reduced by a fixed quota y multiplied by a multiple of 2 by reassembling the four 11 faces of the plate. , according to table 1.

Table 1

Table 1

Number of refill plate bearing mill The value of the millimeter mill refit plate carrier Number plate based on refocusing The value of the quota with which the refilled plate is reduced 1 2 3 4 A D 3 I A (DJ = D - 2x 3.1 I - 2y ' a ₂ (D ₂ ) = D - 4x 3.2 I - 4y ' a ₃ (D ₃ ) = D - 6x 3.3 I - 6y ' to ₄ (D ₄ ) = D - 8x 3.4 I - 8y '

where: 25 x = fixed dimension with which the diameter of the milling machine is reduced;

y = fixed quota representing the value of the depth of reassembly of the plate 27 x = y '

After reassembling a facet of the plate 3, it is positioned with the surface of 29 laying on the flat surface of the cutter, inserting the reassembled facet into the channel c and resting with the cutting face W at a point along the edge of the channel c ensuring a good 31 alignment. of the opposite cutting edge to be reassembled, the plate which is fixed to the surface a, by means of a special screw 4 provided with an eccentric collar, a screw that is threaded into the recess b after it has been introduced by the cylindrical recess central part of the plate 3.1 reassembled on one side. 35

The cutting edges t of the plates 3.1 to 3.4 are made after their proper installation, in the respective bodies of the mills A ₁ to A ₄ . 37 between the eccentric collar of the screw 4 and the central cylindrical release of the removable plate 3, there is a technological play j in order to ensure the perfect alignment of the tip of the cutting edge 39 of the plates 3.1 to 3.4 after their reassembly. This alignment of the cut-off of the removable plates, mounted on the tail mills, is ensured for each plate after every 41 reassembly. __

Claims (6)

1. Tail mill, with mechanically fixed plates, consisting of a central body (1), followed by a tail (2) which is fixed in the tool head of the machine tool, the central body, carrying removable plates (3), of square shape of metallic carbides, disposed on it in displaced planes, characterized in that the central body (1) on its outer surface has diametrically opposed special cutouts (a), provided, centrally, with some central openings (b) threads, which receive a special screw (4) for fixing the plates (3), the cutting continuing with a channel (c), both the cut (a) and the channel (c) receiving and supporting the plate (3) successively reassembled ( 3.1,3.2,3.3,3.4), and diametrically opposed, on the diameter of the cut (a) of the body (1), are recessed (d) opposite to each other. 2. A mill according to claim 1, characterized in that the plates (3.1, 3.2.3.3.3, 3.4), after successive refocusing, it is mounted successively on some mills (A _n A ₃ , A ₄ ) provided with a corresponding central body (1.1, 1.2, 1.3, 1.4), having the outer diameters (θι. D ₂ , D ₃ , D ₄ ) descending with a fixed dimension 2x. Satisfying the relation (D - 2x). 3. A mill according to claims 1 and 2, characterized in that the reassembled plates (3.1, 3.2, 3.3, 3.4), resulting from successive repairs of the initial plate (3) on the side (I), are reduced by a fixed quota 2y 'satisfying the relation (I - 2y '). 4. Mill according to claims 1 ... 3, characterized in that the distance between the recesses (d) from the center of the body is the same for all the bodies (1,1.1,1.2,1.3,1.4) of the mills. 5. Mill according to claims 1 ... 4, characterized in that the plates (3, 3.1, 3.2, 3.3, 3.4) are fixed on the flat surface (a) and in the groove (c) of the mill bodies (1, 1.1, 1.1, 1.3.1.4) is made using a special screw (4) provided with an eccentric collar. 6. Mill according to claims 1 ... 5, characterized in that, between the eccentric collar of the screw (4) and the central cylindrical clearance of the plates (3, 3.1, 3.2, 3.3, 3.4), there is a play (j) through to which the tip (t) of the cutting face (W) of the plates is aligned.