DE202008007212U1 - Mount cutting tool - Google Patents

Abstract

The Bergschneidwerkzeug than the round chisels and drill bits with carbide cutting inserts characterized in that with the aim of increasing the wear resistance, the reliability of fixing carbide cutting inserts in the metallic body of the tool, exclusion their soldering, grouting, gluing and also the exact one Machining the openings for them, becomes the tool from casting into the mold, into which For the time being the carbide cutting inserts are used and for the drill bits - with metallic cassettes fixed.

Description

The The present invention relates to mining tools for Mining machines, jacking machines, drilling rigs and road milling machines.

Of the Subject of the invention is the rotatable round chisel with a made of metal cylindrical chisel with different constructive elements (heels, protective boards, projections etc.) and a carbide cutting insert and also the drill bits with some carbide pins and metal body.

In Course of destruction of the material (rock body, Pavement) involved in the carbide cutting insert and the front (working) surface of the chisel or the drill bit. In the destruction of non-abrasive (abrasive) material of medium strength it is assumed that as a result of turn the chisel or a drill bit Wear the cutting insert and the work surface of the tool at the same time evenly up to full of amortization will, because the work surface the bit as the front surface the carbide cutting insert is much bigger. The present type of cooperation The tool with the destroyed material can be almost ideal computing.

Indeed can get into the mining and rock operation of the whole set of species from small to high strength such as non-abrasive as well as highly abrasive, make viscous rock, so should that Tool for work in such conditions adequately be. When destroying the rock more than middle Firmness or hard firm and with all this grinding sharpness creates very intensive wear of the work surface the body of the tool even made of high-alloy steel, and the carbide cutting insert, which, as a rule, soldered in the chisel body, is and will be unwound broken up (is "washed out").

• – die haltbare (starke) Befestigung des Hartmetallschneideinsatzes im Körper des Werkzeuges zu gewärleisten;
• – die hohe Verschleißfestigkeit der Arbeitsoberfläche des Körpers des Werkzeuges zu gewärleisten.

In this way, one must decide two main problems in the creation and manufacture of the tool:

• - to ensure the durable (strong) attachment of the carbide cutting insert in the body of the tool;
• - to ensure high abrasion resistance of a working surface of a tool case.

The analysis of the known inventions:
Austria 341978 3/10/78,
utility Models DE 7138790 05/04/73,
utility Models DE 7607860 09/02/76,
DE 3519101 A1 04.12.86 shows that the way of fixing the carbide cutting insert of brazing with solder due to the brass, silver and other metals and alloys ( DE 2524307 12.06.80) is the most technological, accessible and profitable at present. In addition, the opening under the carbide cutting insert should be calibrated obligatorily for the supply with respect to the hexagonal fastening and should be guaranteed to be the clearance within the limit of the tolerance for solder and flux. ( RU 2131031 27.05.99). Along with this way were also other ways of attaching the carbide cutting insert, z. B. with gluing ( DE 3500261 C2 29.01.87 and DE 3500261 A1 10.07.86) or pressing in ( Switzerland 561352 30.04.75, utility model DE 76078060 09/02/76, RU 2131031 27.05.99). It is recommended to press in, mainly for drill bits, if carbide cutting inserts will not have the cylindrical shape of a tail part and at first into cylindrical sleeves, in turn, fixed in the body of a drill bit.

Concerning the form of the carbide cutting insert, the same wide spread as most technologically the cylindrical shape got from the pointed conical surface (working surface) for round chisels and the spherical form of the front surface for the drill bits: Austria 341978 10.03.78, utility model DE 7138790 05/04/73, DE 3442546 C2 18.08.88. In supplement to above it is possible to show also on attempts of creation of multilayer carbide cutting inserts with various on resistance to wear from cone-shaped or horizontal layers, but from technological difficulty of manufacture they did not receive the use. ( DE 3519101 C2 38.03.87; DE 3442546 C2 18/8/88

In the course of work of chisels and a drill bit there should be a possibility of twisting (turns) about a longitudinal axis therefore their bodies (bodies) represent bodies of rotation: a chisel - conical (the truncated cone) the working head with Transition in the cylindrical tail part. How on the tail part as well as on the working head the heels, protective boards, projections and the rib can be. ( Austria 341978 3/10/78, DE 4226976 A1 02.25.93).

The cemented carbide cutting insert is placed in the insert and is fixed in one of the above manners in openings on the smaller diameter side of the conical working head. The drill bit - the cylindrical working head with a slightly spherical front part, corresponds to its diameter to accepted diameters of the standard set of diameters of the drill columns and also the cylindrical tail part for fastening on drill rods. The hard Metal pins of the insert are placed in openings on the front part as well as chisels. How to make bodies (chisels), as well as drill bits from hire high-alloyed steel by methods of machining, forging or stamping. The steel should have the good wear resistance and the possibility for thermal strength increase.

For increasing wear resistance of a tool and inserts costly high-alloyed steel on light-alloyed or structural steel use different ways of surface enlargement of working head wear resistance. There are some suggestions (sentences). How out DE 3926627 A1 14.02.91 on the working surface of the chisels of medium-alloyed metal in the Plasmapulverweise is necessary the wear-resistant material (fabric) is created. The hard metal application is also subjected to the carbide cutting insert, and also the chisel holder, in which the chisel is solidified. The way enough expensive and technologically labor intensive. In RU 2019695 15.09.94, the work surface is proposed to the chisels with wear-resistant material (substance) to melt. In contrast to the previous invention, it is necessary to note that, on reflow, the layer of material has the uneven thickness. And, finally, on working surface chisels from less durable steels it is suggested to place protective wheels from wear-resistant material (fabric, metal, alloys). The protective screens can be pressed or pressed into the working surface as in DE 4226976 A1 Be 25.02.93, or are melting like in RU 2019695 15.09.94 fixed.

analyzes all above-mentioned constructive and technological features the production of the Bergschneidwerkzeuges, the metals used and the materials, and also the defects, which in in the course of using the tool for destruction of the mountain species and have the road surface enables the new design of the Bergschneidwerkzeuges develop.

The carbide cutting insert 1 and 2 represents the body of the turning, its head part 1 The conical shape with an angle of sharpening depending on firmness of the destroyed types usually is from 45 ° -90 ° to 110 °. The head part goes into the conical tail part 2 with the angle conicity of 4 ° -5 ° (so-called self-braking cone) and more about whose end has the following form: the sphere 3 , the bulb or paragraph 4 and many others. In addition, the carbide cutting insert can and have the mushroom shape of the working surface. 2 , Pos. 1 , It is made with the purpose of enlarging the surface of the contact carbide cutting insert with the body of the bit (the drill bit).

The protective screen as a conical disc 3 , Pos. 1 and 4 , Pos. 1 , serves for installation on the working surface of the tool (the chisel or the drill bit). It is made of high-strength wear-resistant material and is suitable for attachment in the body of the tool with the ribs 3 , Pos. 2 or the concentric ring protrusions 4 , Pos. 2 with the groove between them on average as a "swallowtail" z. B. supplied 4 , Pos. 3 , The protective screen on the periphery of the working surface has smooth rounding 3 , Pos. 3 ; 4 , Pos. 4 for the coupling with conical 5 , Pos. 1 or parabolic form of the working head the chisel. 2 , Pos. 3 , ( SU 1760106 A1 24.05.89).

• – das Löten oder anderer Arten der Befestigung des Hartmetallschneideinsatzes;
• – die Vorbereitung und die Bearbeitungen die Öffnungen unter den Hartmetallschneideinsatzes;
• – die Warmvergütung der Arbeitsoberfläche, das Hartmetallauftragen oder aufschmelzen der verschleißfesten Materialien (Stoffe);
• – die mechanische Bearbeitung, Schmieden oder Stanzen des Körpers des Werkzeuges.

The cutting tool is manufactured in a technological assumption with full exclusion:

• - soldering or other types of attachment of the carbide cutting insert;
• - preparation and processing apertures under a carbide cutting insert;
• - the heat treatment of the working surface, the hard metal application or melting of the wear-resistant materials (substances);
• - The mechanical processing, forging or punching of the body of the tool.

To this end, the carbide cutting insert 6 , Pos. 2 together with the protective screen 6 , Pos. 3 be in the mold 6 , Pos. 1 located (metallic, sand, earth, etc.). For the fixation of the carbide cutting inserts in the casting of the drill bits, the auxiliary uses may be used as the metallic cassettes remaining within the flooded body. In the form of liquid metal is flooded. The casting temperature of the metal should exceed the melting temperature as minimum to 50 ° C-60 ° C. It increases the castability of the metal, eliminates the possible defects of casting and ensures the durable (strong) contact the tail parts carbide cutting inserts with the body of the tool. The conical shape of the tail part of the carbide cutting insert and the construction of their front side enhance the durability of Zumacher. You can refer to the ribs or the projections of the lower part of the protective glass.

The casting of the tool in the mold allows at the same time necessary for the chisels (drill bits) the structural elements of the body paragraphs, protective ridges, projections, rib, etc. fulfill. In such a way, the casting technology enables to a considerable degree the extent of the mechani To reduce the machining process while the body of the tool can be made of inexpensive structural steel or other metals.

ZITIRTE PATENTS

MOUNTAIN CUTTING TOOL

• Austria 341978 10/3/78
• Switzerland 561352 30/4/75
• Utility model Germany 7138790 05/04/73
• DE 4226976 A1 25/2/93
• DE 3926627 A1 14/2/91
• DE 3519101 C2 28/3/87
• DE 3519101 A1 12/4/86
• DE 3500261 C2 29/1/87
• DE 3401243 C2 29/5/89
• RU 2018659 30/8/94
• DE 3500261 A1 10/7/86
• DE 3442546 C2 18/8/89
• DE 3442546 A1 28/5/86
• Utility Model Germany 7607860 09/02/76
• DE 2630276 12/1/78
• DE 2524307 12/6/80
• RU 2131031 27/5/99
• RU 2019695 15/9/94
• SU 1760106 24/5/89

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - AT 341978 [0006, 0007, 0016]
• - DE 7138790 U [0006, 0007, 0016]
• - DE 7607860 U [0006, 0016]
• - DE 3519101 A1 [0006, 0016]
• - DE 2524307 [0006, 0016]
• - RU 2131031 [0006, 0006, 0016]
• - DE 3500261 C2 [0006, 0016]
• - DE 3500261 A1 [0006, 0016]
• - CH 561352 [0006, 0016]
• - DE 76078060 U [0006]
• - DE 3442546 C2 [0007, 0007, 0016]
• - DE 3519101 C2 [0007, 0016]
• - CH 341978 [0008]
• - DE 4226976 A1 [0008, 0010, 0016]
• - DE 3926627 A1 [0010, 0016]
• - RU 2019695 [0010, 0010, 0016]
• - SU 1760106 A1 [0013]
• - DE 3401243 C2 [0016]
• - RU 2018659 [0016]
• - DE 3442546 A1 [0016]
• - DE 2630276 [0016]
• - SK 1760106 [0016]

Claims (5)

The Bergschneidwerkzeug as the round chisels and drill bits having carbide cutting inserts thereof, that with the aim of increasing the wear resistance, the reliability of fixing carbide cutting inserts in the metallic body of the tool, exclusion their soldering, grouting, gluing and also the exact one Machining the openings for them, becomes the tool from casting into the mold, into which For the time being the carbide cutting inserts are used and for the drill bits - with metallic cassettes fixed. The Bergschneidwerkzeug after the point 1, characterized that with the goal of getting safe and durable contact between the carbide cutting insert and the body of the bit (the drill bit) and also exception of defects in the course of casting, the casting temperature of the metal should be the melting temperature in minimum 50 ° C-60 ° C. The Bergschneidwerkzeug to points 1 and 2, thereof indicative that for the supply of secure attachment the carbide cutting insert in tool's body it Tail part is fulfilled in the form of cylindric: conical with the angle conicity of 4 ° -5 ° (so-called Self-braking cone) and more about, or versatile, with all the end face the carbide cutting insert can z. As the shape of the ball, the bulb or the paragraph and others to have. In addition, the carbide cutting insert can and the mushroom-like shape of the desktop. The Bergschneidwerkzeug to points 1, 2, and 3, Marking that for the increase of Wear resistance of the tool on the work surface install the conical shield from the wear-resistant Material (fabric). The protective screen is combined with the carbide cutting insert into the mold before filling it with liquid Metal issued. For the improvement of the attachment in the body of the tool the protective screen is with the Ribs or concentric ring protrusions with the groove between them on average, as z. B. "swallowtail" provided. The Bergschneidwerkzeug to points 1, 2, 3, and 4 Marking that on the periphery of the work surface the protective glass meets the flowing rounding off, around them with the side surface of the working head the chisel (the drill bit) to link the ever after the Hartbarkeit of the destroyed species (material) conical or parabolic in shape.