FI114388B - Chip-removing tool - Google Patents

Abstract

A circular saw blade or an end-face circular saw blade (22) of a conical chip-removing tool for flattening tree trunks is equipped with teeth (45) arranged on a cutting circle (40). The toothed bodies (46) of the teeth (45) have, in the circumferential direction of the cutting circle (40), a predetermined width (B) and are arranged spaced apart from one another, in such a way that chip spaces of preset width (b) are present between them. The teeth (45) are provided, on the cutting circle (40), with regions (55) which project from the broad side (49) of the toothed bodies (46), the width (B<*>) of which regions is smaller than the width (B) of the toothed bodies (46). Only one section, spaced apart from the broad side (49), of limited thickness (d) of the region (55) is constructed as working region (57). <IMAGE>

Description

114388

The chipping tool

The invention relates to a conical cutting tool according to the preamble of the independent claim, which has chips and an end-saw blade.

The above known type of circular saw blade or cutting tool is known from DE-GM 1 176 194.

A circular saw as is known from the aforementioned DE-GM 1 176 194, but also from DE-PS 3 114 332 or DE-PS 3 045 107, is used as an end circular saw in cutting tools, such as those used for smoothing wood trunks. For this purpose, the conical surface of the conical portion of the cutting tools is provided with a chopping blade for cutting off the chips from the under-edged area of the unprocessed wood frame when treating the wood frame. Because the circular saw blade is at the narrowed outer end of the cutting tool, it is the last to come into contact with the tree trunk and its function is essentially to give the leveled surface a finally sawn surface.

In cutting tools of the type mentioned above, however, also in circular saw blades in general, there is always a problem that the chips that have been removed from the cut material, especially wood, must be removed from the chip cutting area. This is all the more true ;; · the greater the chip removal per unit time. This is especially true, of course, with working: V: 20 fish, where in other areas large quantities of chips are removed as well. . ·. thing in the conical cutting tools described above.

A: If in such cases the circular saw blade structure for chip removal; the necessary chip spaces would be sized too small, so that the circular saw blade would clog the material when machining, which would negatively affect the sawing result.

'!!! In the circular saw blade of the present type according to DE-PS 3 114 332 and DE-PS 3 045 107, the cutting space is defined by the spaces formed between the tooth bodies in the circumferential direction of the tooth path. These intermediate spaces are still * / ”: to accommodate tools for dental treatment,; 30 for example for finishing sanding. However, it is not possible for stability reasons; it increases arbitrarily these spaces and, due to a good sawing result, it is also not possible to position the teeth in the runway too far apart.

2 114388

Further, in a circular saw blade and also in other saws, it is generally known to brush the teeth and / or to form wider in the blade area so that, for example, the tooth blades coming into contact with the circular saw blade protrude laterally over the tooth body thickness. However, this does not change the fact that the tooth blade area contacts the whole or part of the tooth body radially outside the body of the saw blade supporting the saw tooth, and thus the chips are formed substantially where the spaces between the tooth bodies are circumferentially.

For these reasons, the current circular saw blade has a natural limit of 10. This limits the area of use of existing circular saw blades for tools with extremely high chip removal, so that, in an unfavorable case, the circular saw blade can have a limiting factor that limits the working area of an overall tool, such as a tapered cutting tool.

The cutting tool according to the aforementioned DE-GM 1 176 194 has a lateral circular saw blade with a periphery of teeth, disposed on a wide side of a tilt-shaped cutting tool. The mounted circular saw blade then consists of a base plate with circumferentially tooth-shaped projections to which are each attached blade plates. The blade discs are disposed at the leading edges of the tooth-shaped projections and are made slightly thicker than the base plate in the axial direction of the circular saw blade, while passing closer to the periphery of the circular saw blade.

Although, with known cutting tools, the cutting discs are used in their full thickness, so that immediately adjacent to the disc-shaped cutting tool, e.g. on this surface, the chips that fall, can rotate tooth load in the rotational direction.

DE-PS 48 379 is also known as a circular saw blade having a ramp-shaped tooth holder. Various shapes can be inserted into the tooth holders, ···. those dental equipment. In one embodiment of this tooth device, the tooth holder is provided with a radially projecting bead so that the tooth device: ί 30 is laterally spaced from the base plate of the circular saw blade.

This known circular saw blade does not have any of the teeth thus formed; The working area is well known, so it must be assumed that the teeth and its variously shaped dental devices come into contact with their entire outer surface. However, in this case, chipping may be inadequate because each tooth device is pushed so far in the tooth holder that it rests on its rear end in the tooth holder.

Therefore, it is an object of the invention to further develop a circular saw blade of the aforementioned type by increasing the area of use of the circular saw blade towards an increased chip removal relative to the available chip space and thereby improving the usability of combined tools with the circular saw.

This object is solved in accordance with the invention so that only a portion of the protruding tooth portion is a chipping working area spaced sideways to just 10 of the width of the tooth body, the distance being the thickness of the protruding area minus the thickness of the working area.

The task underlying the invention is thus completely solved.

Namely, the circular saw blade according to the invention has the advantage that the chip space is no longer defined by the intermediate spaces which are circumferentially between the tooth bodies.

The fact that the areas of width (in the side view of the circular saw blade) are substantially narrower than the tooth bodies and not directly limited inwardly creates considerably larger volume chips between the protruding areas, for example double or even more numerous volumes. As a result, when using a circular saw blade 20, the severed chips can be removed much more easily, that is to say, considerably higher cutting powers can be used with the circular saw blade. At the same time, the limitations of combination tools, such as the said conical cutting tools, are also eliminated, since the circular saw blade located at the end of the cutting tool is no longer a limiting factor in terms of cutting power. By the measure, min-; : After 25 h only a portion of the limited thickness at a distance from the wide side is formed as a working area, it is a special advantage that the chips ·; · are generally formed only by the thickness of the tooth body and thus by the circular /. outside the body of the saw blade and thus can be removed particularly easily.

It is preferred that the teeth are disposed on the circumference of the circular saw blade body plate and the run ': 30 is embedded in the face of the cutting tool.

: · This operation has the advantage that the base plate is inside the cutting tool plane.

4, 114388

In a further preferred embodiment of the invention, the portion of the protruding tooth is formed in a manner known per se, in particular as a hard metal blade, which is attached to the tooth body.

However, this operation, which is generally known per se in the manufacture of a circular saw, since the carbide blades are preferably soldered to the high-power rotary saw, has the particular advantage that the particular shape of the area can be implemented in various constructive ways.

Thus, in one variation of the above embodiment, the device is implemented such that the carbide blades extend beyond the tooth body thickness and additionally extend beyond this wide side. In another variation of the embodiment, by contrast, the carbide bar blade forms only a portion of the protruding tooth and is laterally secured to the wide side.

Thus, both variants of the embodiment have advantages in terms of manufacturability, associated costs, and operational availability.

It is particularly advantageous, as already mentioned, if the circular saw blade according to the invention is formed as an end circular saw blade of a conical cutting tool for flattening the tree trunks and the areas extend from the conical part of the cutting tool.

In this area of use of the circular saw blade according to the invention, the advantages mentioned above are particularly noticeable.

Other advantages will be apparent from the description of the accompanying drawings.

It is to be understood that the above-mentioned and still-to-be-described identifiers are: not only usable in that particular combination, but also in other combinations or individual settings without departing from the scope of the invention.

; 'An embodiment of the invention is shown in the drawing and will be explained in more detail; min in the following description. In the drawing: »Figure 1 is a plan view of a device having two conical cutting tools in contact with a tree trunk; Fig. 2 is a side elevational view of the teeth of a circular saw blade according to the present invention on a greatly enlarged scale; Figure 3 illustrates Figure 2 in the direction III / III.

5, 114388

In Figure 1, numeral 10 is indicated a total of cutting tools, each one of which 10,10 'is on the tree frame 11 on both sides, wherein the timber body 11 is moved in the direction of arrow 12 in the direction of the fixed chipping tool-bearing-mounted 10,10' relationship.

Five cutting tools 10 are driven by a shaft 15 which is rotated in the direction of the arrow 16 around the axis 17 of the not shown control device. The cutting tool 10 is shaped conically with a conical surface 20 attached at a distance to the chopping blades 21. A circular saw blade 22 is disposed at the forward end of the conical cutting tool 10.

10 When the timber body 11 is moved in the direction of arrow 12 in the direction of cutting tools 10,10 'relative to, the first face 20 a conical surface of the chopping blades 21 into contact with the timber body 11 waned surfaces. Because the saw blade 21 provides a relatively coarse surface, the circular saw blades 22 of the cutting tools 10, 10 are last contacted with the wood frame 11 to obtain a smooth surface 15 of high surface quality on both sides 30, 30 '.

The device shown in Fig. 1 is known per se, except for the construction of the circular saw blades 22, which will now be described in more detail with reference to Figs. 2 and 3.

Fig. 2 shows a path 40 of a circular saw blade 22 showing a line of connection of the teeth of a circular saw blade 22. 41,41a denotes the radii of a circular saw blade 22 passing through the tips of the teeth. For example, if the runway 40 has 120 teeth, the beams are 41, 41a ... so that they operate at about 3 ° intervals. In absolute values, the circular saw blade 22 of interest of this type has, for example, a diameter of between 400 and 600 mm.

. . The number 45 denotes the teeth of the circular saw blade 22 in Figures 2 and 3. The teeth 25 45 are on the circumference of the body plate 35 of the entire circular saw blade 22. Each tooth 45 consists of a tooth body 46, which is usually formed as a single piece; with a circular saw blade 22 base.

:! In Figures 2 and 3, the back side of each tooth body 46 is designated by number 47, the front side by number 48, respectively (in the direction of the runway 40), and 49 by le; 30 pages of water (side view of Figure 2). The wide page 49 is at the same time the front page of the base plate 35.

The body plate 35 is located inside the conical portion of the cutting tool 10 (cf. Fig. · ": 1) so that only teeth 45 protrude laterally from the cutting tool 10, as will be further described below. The body plate 35 is thus flush with the cutting tool. 6114388 50, wherein the carbide blade 50 is soldered, for example, to the tooth body 46. The numeral 51 denotes the backside of the carbide blade 50 in Fig. 2 and the front side 52, again in the direction of the runway 40.

As clearly seen in Figure 3, the carbide blade is formed such that in the representation of Figure 5 it protrudes right over the wide side 49 and thus over the base plate 35 as well as over the conical portion of the cutting tool 10. The device is then made such that only a portion of the laterally protruding portion 55, namely the portion to the right of the dotted break line 56, serves as the working area 57 of the carbide blade 50. This means that the circular saw blade 22 only chips in the working area 57, i.e..

10 laterally spaced from the body of the circular saw blade 22.

The numeral 58 has a dashed dotted line 59 in the region of the carbide blade 50 to illustrate that the carbide blade 50 can not only pass through the entire thickness of the tooth 45 but also through the protruding portion 55, alternatively it is also possible to solder the carbide laterally, namely to the right of line 58, to the wide side 59 of the tooth body 46, which is equivalent in terms of cutting properties since, as mentioned, the working area 57 is spaced laterally from the wide side 49 of the tooth body 46.

In Fig. 2, B denotes the width of the tooth body 46 and b denotes the width of the teeth 45; 20 45a, i.e. the distance between two posterior sides 47, 45a \ of the adjacent teeth 45, 45a \ and the front side 48a.

In contrast, B * denotes the width of the carbide blade 50 in the protruding region 55 and. : b * the rear side 51 of the second tooth 45 carbide blade 50 and the rear tooth; The distance between the front face 52a of the carbide blade 50a of the insert 45a.

* * · 25 In Fig. 3, D is the thickness of the current tooth body 46 or body plate 35, while D * denotes the thickness of the protruding portion 55. The working area 57 has a thickness of * · »* ;;; marked with d.

Figure 2 further shows the angle difference cdla between two adjacent beams 41, 41a, and Figure 3 finally shows that the lateral surfaces of the projecting portion 55 may be oblique to the plane of the circular saw blade 22.

In the already mentioned practical embodiment of a circular saw blade having a diameter between ♦ 400 mm and 600 mm, the said dimensions can be dimensioned, for example, as follows: 7 114388 B = 6.2 mm b = 6.0 mm B * = 2.6 mm b * = 9.6 mm 5 D = 7.0 mm D * = 5.0 mm d = 3.0 mm α = 3 ° β = 0.5 ° 10 The operation of the circular saw blade 22 with teeth 45 is as follows:

In the current circular saw blade, where the carbide blades or, generally speaking, the upper cutting ends of the teeth do not protrude laterally, the chip space defines the spaces between the teeth successively disposed in the orbit. In the embodiment shown, this is equivalent to b (e.g., 6 mm wide).

Due to the fact that, according to the invention, part of the cutting area of the teeth 45 in the form of carbide blades 50 is extended to the protruding part 55 and is also affected only in the working area 57, the chip space is now determined by the distance between these protruding parts 55. This corresponds to the size b * in the illustrated embodiment (e.g. 9.6 mm wide). Therefore, already in this review 20, the chip space has been extended by about 60% by the measures according to the invention in said exemplary embodiment; case; however, in the circular saw blade 22 according to the invention, the effective volume of the chip space is further enlarged so that it is not immediately limited towards the central portion of the circular saw blade 22, unlike the intermediate spaces between the tooth bodies V 46 which only have the central portion of the circular saw blade 22; 25, as is evident from the approaching semicircular ends in Figure 2.

The circular saw blade 22 according to the invention thus provides a considerable amount of mouth. Thanks to the larger cutting areas, you can significantly increase your cutting power without having to worry about adding more cutting space.

: 30 Further, size b can be reduced in a circular saw blade according to the invention. '. 22 for the strength of the tooth body 46, since it is no longer needed at this point '; cutting space as chip cutting has been moved from the circular saw blade to a 22-sided position (57 work area). Therefore, it is possible to make the distance between the tooth bodies 46, i. from b, as small as possible, the names 8114388 are just as small as is necessary to allow a tool to be inserted between the teeth 45, 45a, which allows for machining, for example, tooth-finishing.

· »* · *> I 1 * · ♦» »· '· k» »* * a

Claims (6)

1. Conical buckle removal tool (10) with chopping knives (21) for flattening tree trunks (11) and with an end-side circular saw blade (22) provided with a stem blade (35) and teeth (45) arranged along a top circle (40). , whose tooth bodies (46) have a predetermined width (B) in the circumferential direction of the top circle (40), which teeth are spaced apart from each other, in such a way that span spaces of predetermined width (b) exist between them, and the teeth (45) at the top circle (40) are provided with projecting regions (55) extending from the wide side (49) of the tooth bodies (46), the width (B *) of which is smaller than the width (B) of the tooth bodies (46), characterized in that only a part of the projecting area (55) of a tooth (45) is a tension-producing working area (57) which is laterally spaced from the width side (49) of the tooth body (46), which distance is the thickness (D *) of the projecting area minus the thickness (d) of the working area. Clamp removal tool according to claim 1, characterized in that the teeth 15 (45) are arranged at the circumference of a stem blade (35) of the circular saw blade (22). Clamp removal tool according to Claim 2, characterized in that the stem blade (35) is fitted into the end side of the clamp removal tool (10). Clamp removal tool according to any of the preceding claims, characterized in that the area (55) is designed as a separate structural part, in particular such as cure metal alloy (50), which is connected to the tooth body (46). Clamp removal tool according to Claim 4, characterized in that the curing metal (50) extends over the thickness of the tooth body (46) and also protrudes over its width side (49). • Clamp removal tool according to Claim 4, characterized in that the core metal edge forms only said area and is fixed to the side (58) on the width side: r (49).