SU1308483A1 - Conical face-milling cutter - Google Patents

Abstract

The invention relates to wood chopping equipment. The purpose of the invention is to increase the reliability, quality of chips and simplify the design. The end-conic milling cutter includes a carrier disk 1, a reztsederVyd A, B fi wrap drivers (P), 8, and a Knozhei 3 zak terminal terminal end of the front foot at These edges of its base. The channel by the tooth 7 but is located ka 1 and the cutting-out mat of the rotating chips are cut into the grids further into the holders (P) 2, knives 3 with a long 8 and short 9 cutting edges installed along the spatial helix. The knives 3 are fixed in P 2 by means of a terminal connection 20. At one end of the knife 3, a tooth 7 is made with a long front face 10 and a rear face with a short cutting edge 9. These faces form sharp corners in the plane of the upper base of the plate. The channel for removal of chips is formed by the tooth 7 3 and the surface P 2, is located on the side of the carrier disk 1 and is made open. The material to be processed 30 is fed between two rotating cutters, short chips 9 and long 8 cutting edges of the knife 3 are cut from it. The chips are removed along the edge 10 of knife 3 into the channel and further into the stream. 6 Il. i (Л 1в 22 15 / h) Г / / o about 00 4 00 with aggr.

Description

eleven

The invention relates to the woodworking industry., In particular, to equipment for shredding wood.

The purpose of the invention is to improve the reliability, quality of chips and simplify the design.

FIG. 1 shows a milling cutter, a general view5 of FIG. 2 is a view A and a view B in FIG. G, FIG. 3 is a view of B in FIG. 1 in FIG. 4 tool post cutters; in fig. 5 - a knife (1st variant), - in FIG. 6 - the same (2nd version).

The face-conical milling cutter includes a carrier disk 1, uneven-high tool holders 2 with knives 3 mounted on them in a spatial spiral. A support disk 5 is fixed on the hub 4 of the carrier disk 1 and the tooth 3 is made in the form of a trapezoidal plate 6 with a tooth 7 on it. Tooth 7 has a long 8 and a short 9 cutting edges, formed

-

Providing an acute angle 16 between the edge 8 (or the tangent 14 to it) and the continuation of the side surface 15 of the knife 3, the tooth 7 is reground on its front face 10 in the direction of the largest dimension of the knife 3, which makes it possible not to limit the stock on the regrind

front edge 10, back edge

11 (with a short cutting edge 9), 25 teeth 7. Since the opposite

As well as the upper 12 and the lower 1 13 base 7 end of the knife 3 passes between the tool holder 2 that follows it and the center of the cutter, it does not limit the distance between the adjacent tool cutters - 30 liters and 2 and can be performed with a sufficiently large margin on regrinding. This increases its durability without reducing the total number of knives 3 on the carrier disk 1 (with its diameter 35). The presence of angles 22 and 23 prevents the possibility of scraping the seats;

chipped cutting edge 8, At angles of 16, large 60, product quality deteriorates.

The rear face 11 (with a short cutting edge 9) in the plane of the upper base 12 of the plate forms a sharp (40-50) with the continuation of the second lateral 5 side ends adjacent to it trapezoidal | 18 trapezoidal plate.

foot section. At angles of 17, smaller | about

The vanes of the trapezoidal section plate 6. The length of the cutting edge 8 (Figures 4 and 5) can be straight (1st variant) or curvilinear (2nd variant). Edge 8 (or tangent to 14 K. her) forms with the continuation of the side surface 15 of the knife 3 a sharp (10-60 °) angle 16 in a flat,

These upper bases are 12 plates. With ss 16, less than 10., It impairs the knife part (opposite to tooth 7) 3 of the material being processed, and also makes it possible to place the fixing part of individual knives 3 under the supporting disk 5 (Fig. 3), which allows to keep it sizes. The knife 3 can be provided with two teeth 7 located on the counter

the number of knives decreases

On the tool holder 2 from the side opposite to the axis of rotation, the cutter is not supported. At angles 17, greater than 50, the conditions for sharpening knives with a jagged cutting edge of 8 "deteriorate.

The tool holder 2 is made with a dovetail-type groove 19, which, when the threaded fastener is tightened (after the knife 3 is installed in the groove 19), has a terminal connection 20. The groove 19 is designed so that its base 21 is inclined to a plane perpendicular to the axis of rotation of the mill, in cross section - at an acute angle of 22 (3-10), and in the longitudinal - at an angle of 23 (10-20 °).

At angles of 22, less than 3, increase

,

20

force is applied when pressing the knife, which deteriorates the working conditions of the tooth 7 because of the large friction forces. At angles 22 greater than 10, the strength of the tooth 7 decreases. At angles 23 smaller than 10, the conditions for placing the tail section of the knife 3 under the supporting disk 5 deteriorate. At angles 23 larger than 20, the quality of the sawn timber is reduced when using knives 35 with curvilinear front face of a tooth 7.

Providing an acute angle 16 between the edge 8 (or the tangent 14 to it) and the continuation of the side surface 15 of the knife 3, the tooth 7 is reground on its front face 10 in the direction of the largest dimension of the knife 3, which makes it possible not to limit the stock on the regrind

Yu

25 teeth 7. Since the opposite of teeth

If the 7 end of the knife 3 passes between the tool holder 2 that follows it and the center of the cutter, it does not limit the distance between adjacent cutter tools 2 and can be made with a sufficiently large margin for regrinding. This increases its durability without reducing the total number of knives 3 on the carrier disk 1 (with a constant diameter). The presence of angles 22 and 23 prevents the scraping of the locking ends of the trapezoidal section plate.

The knife part (opposite the tooth 7) of the knife 3 is about the material being processed, and also makes it possible to place the fastening part of the individual knives 3 under the supporting disk 5 (Fig. 3), which makes it possible to preserve its dimensions. The knife 3 can be provided with two teeth 7, located on the counter

On the tool holder 2, on the side opposite to the axis of rotation of the carrier disk 1, a notch 24 is formed, forming an inclined platform 25. The platform 25 is inclined in the radial 26 and in the tangential 27 directions. The cut-out 24 and the knife 3 form a double-sided, expanding channel 28 for the removal of chips 29. The tool holders 2 are mounted on the carrier disk 1 in such a way that the knife 3 passes between the subsequent tool holder 2 and the center

31

cutters. In addition, the cutter has the processed material 30, the support pad 31, the lead chamfer 32, part 33 of the base 21 of the groove 19, lying closer to the center of the cutter, the longitudinal axis 34 of the groove 19.

End-conic milling works as follows.

The material to be processed 30 is fed between two cutters installed one against the other. During the rotation of the milling cutters, the knives 3 are successively cutting off the chips 30 from the material being processed 30. Short 9 and long 8 cutting edges are involved in the cutting. The thickness of the chips 29 provide the installation of adjacent tool holders 2 different heights. This difference determines the chip thickness 29.

The limiting development of a leading crack in the mass of material being treated is carried out by supporting the wood with a supporting platform 31, the level of which lies in the plane corresponding to the level of the long cutting edge 8 of the previous knife 3. To prevent chipping of the processed material 30 by the tool holder 2 before the supporting platform 31 on it is filled chamfer 32.

The cut chips (chips) 29 are removed along the front face 10 of the knife 3 into the channel 28, Since the channel 28 is filled with expanding in the direction of the chips 29 both in the radial 26 and in the tangential 27 directions, due to centrifugal inertia forces

improve the conditions for removing chips 29 from channel 28, while reducing the likelihood of clogging of channel 28 with chips 29. Chips 29 are removed into the process stream.

Claims (1)

Invention Formula A face-conical milling cutter — including a carrier disc, tool holders, and knives in the form of plates with a long and short cutting edges, mounted in a spatial spiral, fixed in the grooves of the tool holders by means of a terminal connection with the formation of a channel for chip removal, which is with the aim of increase the reliability, quality of chips and simplify the design, the base of the groove in each tool holder is located at an acute angle to the plane perpendicular to the axis of the bearing disk, while the part of the base lying in each cross section of the groove at the center of the cutter is located above the bearing disk, and the longitudinal axis of each groove passes between the center of the cutter and the subsequent tool holder, and at one end of the knife there is a tooth in which the front face and the rear face are formed in the plane of the upper base of the face s sharp corners and channel obrazovannsh tooth and the surface of the toolholder, located on the side of the carrier disc and a toolholder vsholnen open. 9lLZ. one View B (turned) (RigZ f 9 1 11 sixteen 17 18 12 Rig. five Editor I. Shulla Compiled by V. Agafonov Tehred M. Khodanych Order 1666/14 Circulation 463 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader M. Pojo