Tool holder.

FIELD: mining..

SUBSTANCE: invention refers to mining and building, particularly to machines with pulvimixer. A tool holder for a machine with the pulvimixer or such like has base (10) which bears holding added piece (30), also added piece (30) has receiving seat (31) of the cutting tool; and lug (15) is attached to base (10) before holding added piece (30) in the direction of tool holder feeding. Base (10) has connecting section (20) made in form of a chip breaker; the connecting section is formed on base (10) and passes at least partially through lug (15) starting from holding added piece (30). End section (34) of holding added piece (30) has intake seat (31) of the cutting tool made in form of an aperture. Also end section (34) has circular contact surface (33) passing around medium lengthwise axis of intake seat (31) of the cutting tool. Contact surface (33) which is located radially outside passes up to dimension boundaries of a cylinder region of end section (34). Connecting section (20) returning in the direction of the axis relative to contact surface (33) is connected with holding added piece (30).

EFFECT: improved operation of cutting of disk pulvimixer.

9 cl, 3 dwg

 

The present invention concerns a holder for a machine with a road milling cutter or the like to the base, which is holding an extension, and holding the extension piece has a receiving socket of the cutter and feed direction of the tool holder before holding the extension piece attached to the base of the ledge.

The tool holder of this type is known from DE 4322401 C2. The tool holder when it is equipped inserted by extension, with which he is charged with the possibility of replacement in the output socket of a node of the main body. The main body is fixed on the outer perimeter of the cutter drum. Inserted the extension of the tool holder narashima connected to the base. The Foundation has drawn from the inset, tie-side holding an extension. Restraint extension provided with a hole into which can be inserted in a known manner a rod cutter. For example, in DE 3701905 C1 shows the approximate possible position of the Assembly.

Retaining the extension of the tool holder provided with a cylindrical section, which is in the form of recesses in the form of grooves made circumferential marking of wear. In the field in the direction of feed of the tool retaining extension Foundation has made in the shape of the apron flange which overlaps the surface of the main body, which made the bracket d is I inserted tie. Thus protected, this area of the main body. In the prior art, also known as holders, without which the main body is fixed directly on the milling drum.

The above holders are used on machines with road cutters, and similar machines for soil cultivation, such as soil stabilizer, mining machines, etc. depending on the properties of the treated soil changing power consumption of the machine. Found that the layers of the coating, which when cut is prone to the formation concourses chips, oppose instrument high resistance. For example, such forms of chips are formed when cutting asphalt surfaces, in which between the outer layer (at most approximately 4 cm thick) and a layer of binder there is a lack of grip.

The objective of the invention is to provide a tool holder type mentioned at the beginning, with which you can improve cutting ability of the road milling cutters or the like

The problem is solved due to the fact that the Foundation has made in the form of chip connecting section, which is formed on the substrate and which, proceeding from the retaining tie, passes at least partially through the ledge.

With chipbreaker can efficiently attests the separated chips, in particular large clumps. This reduces cutting resistance which the tool holder opposes the milled material, which leads to lower power consumption.

Thus, it allows to achieve improved efficiency of the machine.

Then it turned out that the connection holding tie with the tab via a connecting section results in improved rigidity of the tool. This has a positive effect, in particular, in the case of an open (unprotected) restraint superstructures and/or protrusions and increases service life.

According to a preferred variant embodiment of the invention provides that the connecting section goes in the direction of feed of the tool. Thus, there is the cutting geometry, which opposes the milling material is negligible resistance to penetration.

Valid variant embodiment of the invention may be such that the connecting section forms an intermediate section, and holding the extension piece has a protruding above the base of the tail section and perpendicular to the feed direction of the width of the intermediate section is less than the size of the terminal segment in this direction.

Another variant embodiment of the invention differs in that the end is Astok restraint tie has a receiving slot cutter, designed as a hole, and the tail section has koltseobrazno passing around the middle longitudinal axis of the socket of the cutter contact surface and the contact surface situated radially on the outside, goes to the dimensional boundaries of a cylindrical region end portion, and a connecting section, returning in the direction of the axis relative to the contact surface, is connected with the holding extension.

Cylindrical region holding the tie forms a zone of wear, as it is principally described in DE 19902766.8-24. Open the contents of this document are relevant to the subject of the preceding description.

On the annular contact surface rests the head of a rod cutter provided intermediate the location of the washers for wear protection. Washer for wear protection takes place, at least until the dimensional boundaries of the contact surface. Thus, there is a wear system. During insertion of the tool washer for wear protection rotates on a contact surface and a continuous deterioration of the cylindrical region. By return the location of the connecting section holding the extension is stabilized, however, does not adversely affect the wear system.

In order to provide continuous drainage of Strug and, according to the invention provides that the connecting section has two sides of the intermediate segment stroikottage surface, which, proceeding from the intermediate segment, are deflected in the direction to the base, and the connecting section through the fillet transition areas adjacent to the retaining extension.

Optimization of the cutting geometry of the tool holder is obtained due to the fact that the base in the area of the protrusion side is limited by the two inclined surfaces, which are located in the feed direction of the tool swept relative to each other, and the connecting section and the inclined surface facing in the front end region of the protrusion. The front end region forms a narrowed area, which, especially when forming large chips milling breed, provides good chip control.

The service life of the tool holder can be optimized due to the fact that the connecting section is hardened and/or on the connecting section is applied, at least one element of a high-strength material. As part of a high-strength material can be used, for example, cemented carbide.

Good struzhkolomy geometry is obtained due to the fact that the connecting section has a tapered or rounded shape is egusa edges.

The invention is further explained in detail on the basis of option implementation shown in the drawings, which depict:

figure 1 - tool holder on perspective front view,

figure 2 - tool holder according to figure 1 in side view and

figure 3 - side view of the combination tool shown in figure 1 and figure 2 the tool holder and the main body and mounted in the tool holder cutter picks.

Figure 1 shows the holder base 10. The base 10 has a supporting part facing down, the bearing surface 11. The supporting part moves in the direction of flow of the protrusion 15. When this protrusion 15 is at an angle to the supporting part.

In the transition region from the base portion to the protrusion 15 on the base 10 is made protruding downward insertion of the extension 12. With insertion of the tie 12, the tool holder can be inserted in the bracket main body 50. In this case, insertion of the extension 12 may be mounted with an interference fit in the socket.

The front centering surface 13, as also shown in figure 2, the rear clamping surface 12.1 insertion of the tie 12 serving as a support. In the assembled state of the tool holder rests its bearing surface 11 on the mating surface of the main body 50. The protrusion 15 overlaps the ledge 51 of the principal to the pus 50 and protects it from wear and tear due to the remove of milled material. On the basis of the tool holder 10 is made holding the extension 30 on the connecting section 35. The connecting section 35 may also have a geometry of a truncated cone or bucket. At its facing away from the connecting section 35 of the end restraint extension piece 30 moves in the protruding cylindrical end section 34. In the end turned 34 two concentric encircling is made in holding the extension 30 of the hole (socket 31 of the cutter) marking 34.1 wear. Thus, marking 34.1 wear form depressions in the form of grooves, which are located behind the contact surface 33 adjacent to the cylindrical end section 34.

As you can see in figure 3, the bracket 31 of the cutter to its shank can be inserted cutter 40 with round shank. The cutter 40 with round shank is adjacent to the shank head 41 of the cutter, which has one vertex cutter carbide. The head 41 of the cutter rests at an intermediate location of the washer 42 to protect against wear on the contact surface 33 of the retaining tie 30.

As clearly can be seen in figure 2, holding the extension piece 30 between the cylindrical end section 34 and fillet section 35 forms a middle connecting part 34.2. It is through the connecting portion 20 attached at one a the to tab 15.

The connecting portion 20 is held at the same time, proceeding from the connecting part 34.2, in the direction of feed of the tool. He has aligned intermediate section 21, which slanted through stroikottage surface 22 moves in the lateral surface 19 of the protrusion 15. The connecting portion 20 is continuously goes toward the front end region of the protrusion 15.

Two limiting protrusion 15 with sides sloping surface 14 facing in this area, so that the connecting portion 20 and the inclined surfaces 14 get swept path.

The protrusion 15 ends in the terminal region by fillet transitions 16. The inclined surface 14 through the fillet transitions 17 adjacent to the side surfaces 19. The connecting portion 20, on the one hand, for reasons of optimization stresses and, on the other hand, for improved chip removal using fillet transition sections 18, 23 attached to the retaining extension 30.

1. Tool holder for a machine with a road cutter or TPS base (10), which is holding an extension (30), and holding the extension piece (30) has a socket (31) of the cutter and feed direction of the tool holder before holding the extension piece (30) to the base (10) is attached to the protrusion (15)and the base (10) is performed in the de chip connecting section (20), which is formed on the base (10) and which, proceeding from restraint tie (30), passes at least partially through the protrusion (15), and the tail section (34) of the retaining tie (30) is made in the form of holes of the bracket (31) of the cutter, and the end section (34) has koltseobrazno passing around the middle longitudinal axis of the socket (31) cutter contact surface (33), and the contact surface (33), lying radially on the outside, goes to the dimensional boundaries of the cylindrical region of the end section (34), and the connecting section (20), back in the direction of the axis relative to the contact surface (33), connected with the holding extension (30).

2. Tool holder according to claim 1, characterized in that the connecting section (20) passes in the direction of feed of the tool.

3. Tool holder according to claim 1, characterized in that the connecting section (20) forms an intermediate area (21), and holding the extension piece (30) has protruding above the base (10) end section (34), and thus perpendicular to the feed direction of the width of the intermediate section is less than the size of the end portion (34) in this direction.

4. Tool holder according to claim 3, characterized in that the connecting section (20) has on both sides of the intermediate area (21) stroikottage surface (22), which is s, proceeding from the intermediate area (21), are deflected in the direction to the base (10).

5. Tool holder according to claim 1 or 3, characterized in that the connecting section (20) through gallery transitional part (18) is adjacent to the retaining extension (30).

6. Tool holder according to any one of claims 1, 2 or 4, characterized in that the base (10) in the area of the protrusion (15) side is limited by the two inclined surfaces (14), which are located in the feed direction of the tool swept relative to each other, and the connecting section (20) and the inclined surface (14) facing the front end region of the protrusion (15).

7. Tool holder according to claim 1, characterized in that the connecting section (20) hardened.

8. Tool holder according to claim 1, characterized in that the connecting section (20) is applied, at least one element made of hard alloy.

9. Tool holder according to claim 1, characterized in that the connecting section (20) has a conical or rounded shape of the cutting edge.



 

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