ES2310692T3 - FLAT CINCEL. - Google Patents

Abstract

The tool (1) used for breaking and removing stone or plaster is designed as a cylindrical shaft (3) with an upper area (4) suitable for being clamped into the chucks of the power tool and a wedge-shaped lower area (2) with a transversal cutting edge. A rib positioned longitudinally on one side of the flat lower segment (2) is pointed towards the upper end and provided with a short pointed tip adjacent to the wider lower end.

Description

Flat chisel

The invention relates to a flat chisel according to the preamble of claim 1.

Flat chisels of this type are used for stone machining, especially wall stone, to produce for example through holes, channels and slits. Of the state of the technique known flat chisels with different highlights on The hitting surfaces. Flat chisels are known especially of WO 01/36163. It's about improving flat chisels of this type in terms of its destructive or breaking action.

From document DE 83 20 045 U has been given to knowing a flat chisel according to the preamble of claim 1. On the flat face of the chisel it has cuneiform nerves oriented along. These cuneiform nerves have a first flat long region directed towards the chisel blade and a short connection region, oriented towards the chisel rod and located behind. A cuneiform nerve of this type has the inconvenient that the chisel with these cuneiform nerves only it has a reduced breaker or crusher force for the material to be treated

The invention has imposed the task of develop a flat chisel that, in a region close to the blade, present all the width of the blade greater strength groundbreaking or destructive

The task is solved in conjunction with the preamble of the claim 1, according to the invention, by means of characteristic features of claim 1. In the subordinate claims are perfected advantageous and convenient.

The flat chisel according to the invention has on at least one of the striking surfaces at least one nerve cuneiform, which is characterized by a short front segment, which rises obliquely in relation to the striking surface, and a second long segment that descends in plane with respect to the axis longitudinal.

A flat chisel configured in this way will immobilizes in its direction of action in operation, first place, using the main blade that penetrates the material and presents, during further penetration into the material, a greater breaking or crushing force, which is generated by the segment of striking the cuneiform nerve that protrudes obliquely from the hitting surface. It is important that the hitting segment be small and be delayed with respect to the main blade, to slow down only the penetration of the flat chisel in the material because of the cuneiform nerve. The hitting segment is the region of the cuneiform nerve with which it presumably acts on The material to be machined. After the hitting segment comes the support segment that is located - as you look against the direction of action of the flat chisel - leeward segment hit. The support segment has the task of stabilizing the hitting segment and ensure that the chisel, in the case of a full penetration of the chisel head into the material a machining, can be easily removed from it. This guarantees the support segment through its extended, almost parallel path with respect to the longitudinal axis of the chisel, since by means of this prevents a hook-type nerve behavior cuneiform. The main cutting length is with respect to the cross-sectional length or surface length of I hit in an approximate ratio of 5: 1 to 10: 1, especially 7: 1 in relation to the effective lengths of the blades or of the striking surface, in the direction of action x of the chisel flat.

The chisel has according to the invention a cuneiform nerve, which protrudes from the striking surface in a front view with two triangular surfaces, where the surfaces form a cross-cutting edge between them transversely to the main blade and where the projection is complete in the form of a pyramid through two other surfaces triangular By the cross-cutting edge and the surfaces a deep penetration of the cuneiform nerve in the material to be machined.

According to a preferred embodiment, the cutting edge or striking surface of the cuneiform nerve It has an angle α of approximately 40º to 50º with relation to the longitudinal axis of the flat chisel. It is planned in especially an oblique position of the cross-cutting edge or of the striking surface of the cuneiform nerve with an angle α of 45 ° with respect to the longitudinal axis. By means of this it is achieved that the cross-cutting edge or the surface of beating, despite an intense action of separation and rupture, penetrate relatively easily into the material a mechanize.

The invention also provides that the surfaces that are located, as you look against the direction of flat chisel action, leeward of the surfaces that form the cross-cutting edge or the striking surface, and that they extend over the striking surface of the flat chisel to the chisel shank By means of this the hitting segment of the Cuneiform nerve receives optimal support.

The invention provides at least one of the flat chisel hitting surfaces at least one nerve cuneiform. Through the number and position of the nerves It is possible to adapt the destructive force of the chisel flat, specifically, the material to be machined and the behavior Chisel desired. For example, it is planned to have two nerves cuneiform that run symmetrically and parallel to the axis longitudinal of the flat chisel on its striking surface. By middle of this the main blade rests in all its width in its destructive action and acts effectively against a turn of the flat chisel around its longitudinal axis, such that the desired target direction is maintained with a high force of breaking off.

The invention also provides for the segment of striking the cuneiform surface by two surfaces located obliquely with respect to the main cutting edge and obliquely with respect to the striking surface of the flat chisel, that form each other the cross-cutting edge. A configuration of this type of hitting segment favors the deep penetration of the chisel in the material to be machined.

According to an execution variant, the invention foresees forming the striking segment primarily by a triangular striking surface, which is located with its base face parallel to the main cutting edge and support the same through two triangular surfaces, oriented towards each other by way of a two-slope roof, on the surface of flat chisel hit. Through this a nerve is created cuneiform which, through its striking surface oriented in the direction of action of the chisel, presents a high action of debris and in which after the hitting segment the Support segment is set lean.

According to another variant of execution the invention foresees forming the striking segment primarily by means of a triangular striking surface that, with its base side, It is located parallel to the main cutting edge and support the same through three triangular surfaces on the surface of striking the flat chisel, such that the cuneiform nerve get the appearance of an upper segment of a pyramid. At case of such a configuration of the cuneiform nerve also the lateral surfaces of the cuneiform nerve, which They run parallel to the longitudinal axis of the chisel, especially in the case of a chisel that penetrates obliquely in the material to mechanize, possess characteristics of destruction of the material and of Chisel guided.

According to the invention it is planned to form the segment of the cuneiform nerve hit mainly by a rectangular striking surface, which is located with its face base parallel to the main cutting edge and support it to through three rectangular surfaces on the surface of flat chisel hitting, so that the cuneiform nerve get the look of an ascending ramp from two sides. At case of such a configuration of the cuneiform nerve, they also have the lateral surfaces of the cuneiform nerve that They run parallel to the longitudinal axis of the chisel, especially in the case of a chisel that penetrates obliquely in the material to machining, material destruction and guidance characteristics of the chisel.

Additional details are described in the drawing of the invention, based on exemplary embodiments shown schematically in the drawing.

Here they show:

Figure 1a_ {I} a plan view on a flat chisel according to the invention,

Figure 1a_ {II} a side view of the chisel plane represented in figure 1a_ {I},

Figure 1a_ {III} a detailed view enlarged figure 1a_ {I},

Figure 1a_ {IV} a detailed view enlarged figure 1a_ {II},

Figure 1a_ {V} a front view of the chisel plane represented in figures 1a_ {1} to 1a_ {IV} from a Iav observation direction,

Figures 1b_ {1} to 1b_ {III} a second flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 2a_ {I} to 2a_ {III} a third flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 2b_ {I} to 2b_ {III} a quarter flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 3a_ {I} to 3a_ {III} a fifth flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 3b_ {3} to 3b_ {III} a sixth flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 4_ {I} to 4_ {III} a seventh flat chisel according to the invention in three corresponding views  to figures 1a_ {III} to 1a_ {V},

Figures 5_ {I} to 5_ {III} an eighth chisel plane according to the invention in three views corresponding to the Figures 1a_ {III} to 1a_ {V} and

Figures 6_ {I} to 6_ {III} a ninth chisel plane according to the invention in three views corresponding to the Figures 1a_ {III} to 1a_ {V}.

Figure 1a_ {I} shows a plan view on a flat chisel 1. The flat chisel 1 is composed fundamentally of a chisel head 2, a rod 3 and a clamping end 4. Clamping end 4 is configured as SDS or SDS-Plus stem.

A view is shown in Figure 1a_ {II} lateral on the flat chisel shown in the figure 1a_ {I}.

Figure 1a_ {II} shows an enlarged view of the chisel head 2 in a plan view. The head of chisel 2 has a main blade 5 located transversely with respect to a longitudinal axis of chisel L1. This is transforms, through cutting surfaces 6a, 6b, into a front striking surface 7a and a striking surface rear 7b (see also figure 1a_ {IV}). The surfaces of cut 6a, 6b form each other a leading cutting edge 8. At sides of the striking surfaces 7a or 7b are arranged lateral striking surfaces 9a, 9b and 10a, 10b, which flow to the main cutting edge 8. The striking surfaces 7a, 7b are limited in each case by cutting surfaces 6a or lateral striking surfaces 9a, 9b or 10a, 10b and the rod of chisel 3. Here the striking surface 7a or 7a, with the formation of a pointed surface, becomes the chisel rod 3 of round cross section. The main blade 5 has a width B5. On the striking surface 7a a cuneiform nerve 11, which runs parallel to the longitudinal axis L_ {1}. The cuneiform nerve 11 stands out in the lateral view ascending obliquely, similar to a pyramid quadrilateral, from the striking surface 7a, where two triangular surfaces 12a, 12b form each other an edge of cross section 13, which is located transversely with respect to the main cutting edge 8 and is tilted against a direction of action x of the flat chisel 1. The surfaces 12a, 12b together with the cross-cutting edge 13 form a segment of beating 14 of the cuneiform nerve 11. Surfaces 12a, 12b can also contemplated as part of a tetrahedron T with a tip S, where the cross-cutting edge 13 joins the surface of I hit 7a at the S tip and thus form a tetrahedral edge. In a support segment 15 turned towards the chisel rod 3, the cuneiform nerve 11 is formed by two triangular surfaces extended 12c, 12d and extends almost to the chisel rod 3. Here a burr 16 formed by surfaces 12c, 12d runs, in the direction of the cross-cutting edge 13, almost in parallel to the longitudinal axis L 1 of the flat chisel 1 (see also figure 2). The cuneiform nerve 11 extends in the plan view for a length L_ {11}, where the length L_ {11} is composed of a length L_ {14} of the striking segment 14 and of a length L_ {15} of the support segment 15. Here the hit segment 14 and support segment 15 are approximately in a ratio of 1: 9.

A view is shown in Figure 1a_ {IV} lateral on the flat chisel 1 shown in Figure 1a_ {III}  from an arrow direction 1a_ {IV}. The cutting edge 13 runs along the longitudinal axis L_ {1} with an angle α = 45 ° and has a length L 13. Apart from the nerve cuneiform 11, the flat chisel 1 is configured with symmetry speculate about a plane E_ {1} that runs perpendicularly in the drawing plane. Hitting surface 7a runs with respect to the plane E1 approximately with a angle β = 8 ° and the cutting surface 6a runs with with respect to the plane E1 approximately with an angle γ = 30th.

Figure 1a_ {V} shows a view front on the flat chisel 1 shown in figures 1a_ {I}  to 1a_ {IV} from an arrow direction 1a_ {V}. Of sight frontal can be deduced the effective length L_ {13W} in the striking direction of the cross-cutting edge, with which it acts in the direction of action x of the flat chisel 1 on the material to be machined A width B 11 of the cuneiform nerve is corresponds approximately to the effective length of the edge of cross section 13. Figure 1a_ {V} can also be seen that the lateral striking surfaces 9a, 9b, 10a, 10b run in each case forming an angle δ = 60 ° with respect to the plane E_ {1}.

Figures 1b_ {1} to 1b_ {III} show in analogy to figures 1a_ {I} to 1a_ {V} a second flat chisel 1, in which on striking surfaces 7a and 7b is arranged centrally in each case a cuneiform nerve 11.

Figures 2a_ {1} to 2a_ {III} show in analogy to figures 1a_ {III} to 1a_ {V} a third flat chisel 1, in which on a striking surface 7a they are arranged symmetrically to a longitudinal axis L1 two cuneiform nerves eleven.

Figures 2b_ {1} to 2b_ {III} show in analogy to figures 2a_ {I} to 1a_ {III} a fourth flat chisel 1, in which on striking surfaces 7a, 7b are arranged symmetrically to a longitudinal axis L 1 in each case two cuneiform nerves 11.

Figures 3a_ {1} to 3a_ {III} show in analogy to figures 1a_ {III} to 1a_ {V} a fifth flat chisel 1, in which on a striking surface 7a they are arranged symmetrically to a longitudinal axis L1 three nerves cuneiform 11.

Figures 3b_ {1} to 3b_ {III} show in analogy to figures 3a_ {I} to 3a_ {III} a sixth flat chisel 1, in which on striking surfaces 7a, 7b are arranged symmetrically to a longitudinal axis L 1 in each case three cuneiform nerves 11.

Figures 4_ {I} to 4_ {III} show in analogy to figures 2a_ {I} to 2a_ {III} a seventh chisel plane 1, in which on a striking surface 7a are symmetrically arranged to a longitudinal axis L1 two ribs cuneiform 11. Unlike the known cuneiform nerves of Figures 1a_ {3} to 3b_ {III}, the cuneiform nerves 17 in a hitting segment 14 does not present any cutting edge transverse, but in each case a triangular striking surface 18, which is inclined with respect to the longitudinal axis L 1 of shape corresponding to the cross-cutting edge of the Figures 1a_ {3} to 3b_ {III}. In a support segment 15 the nerve cuneiform 17 ends with two other triangular surfaces 19a, 19b, similar to a two-water roof, on the surface of hit 7a. A burr 20, which is formed by the two surfaces 19a, 19b with each other is set flat. Burr 20 flows against a direction of action x with a slight inclination of approximately 1º to 3º towards the longitudinal axis L_ {1}.

Figures 5_ {I} to 5_ {III} show in analogy to figures 2a_ {2} to 2a_ {III} an eighth flat chisel 1, in which on a striking surface 7a they are arranged symmetrically to a longitudinal axis L1 two nerves cuneiform 21. Unlike the known cuneiform nerves of Figures 1a_ {3} to 3b_ {III}, the cuneiform nerves 17 in a hitting segment 14 does not present any cutting edge transverse, but in each case a triangular striking surface 22, which is inclined with respect to the longitudinal axis L 1 of shape corresponding to the cross-cutting edge of the Figures 1a_ {3} to 3b_ {III}. In a support segment 15 the nerve cuneiform 21 flows into three other triangular surfaces 23a,  23b, 23c on the striking surface 7a. Triangular surface 23b flows against a direction of action x with a slight inclination of approximately 1º to 3º towards the longitudinal axis L_ {1} and becomes surface 7a. The cuneiform nerve 21 can also be described as a quadrilateral pyramid tip, wherein the lateral surface 22 with a base face G 22 in parallel to a leading cutting edge 8.

Figures 6_ {I} to 6_ {III} show in analogy to figures 2a_ {I} to 2a_ {III} a ninth flat chisel 1, in which on a striking surface 7a they are arranged symmetrically to a longitudinal axis L1 two nerves cuneiform 24. Unlike the known cuneiform nerves of Figures 1a_ {3} to 3b_ {III}, the cuneiform nerves 24 in a hitting segment 14 does not present any cutting edge transverse, but in each case a triangular striking surface 25, which is inclined with respect to the longitudinal axis L 1 of shape corresponding to the cross-cutting edge of the Figures 1a_ {3} to 3b_ {III}. In a support segment 15 the nerve cuneiform 24 flows through three other surfaces rectangular 26, 27a, 27b, on the striking surface 7a. In the plan view the striking surface 25 is prolonged by the cover surface 26 and the cuneiform nerve 24 is limited laterally by the lateral surfaces 27a, 27b. The surface of cover 26 flows against a direction of action x with a slight inclination of approximately 1º to 3º towards the axis longitudinal L1 and is transformed into the striking surface 7a. The cuneiform nerve 21 can also be described as a ramp or fort.

Also in the case of flat chisels represented in figures 4_ {I} to 6_ {III} a arrangement on both sides of cuneiform nerves according to Execution variants not shown.

In the execution examples represented in Figures 1a_ {I} to 6_ {III} the cuneiform nerves are set identically in the respective flat chisel and symmetrically arranged relative to the longitudinal axis of the chisel flat. According to other variants of execution not shown, it is planned to configure the cuneiform nerves differently on the respective flat chisel and / or arrange them symmetrically.

The invention is not limited to examples of Execution represented or described. Rather understand improvements of the invention in the field of claims.

List of reference symbols

one

Flat chisel

2

Chisel head

3

Chisel shank

4

Clamping end

5

Main blade

6a, 6b

Cutting surface

7a, 7b

Hitting surface

8

Main cutting edge

9a, 9b

Side Hitting Surface

10a, 10b

Side Hitting Surface

eleven

Cuneiform nerve

12a-d

11 surface

13

Cross cutting edge

14

Hit segment of 11, 17, 21, 24

fifteen

Support segment of 11, 17, 21, 24

16

Burr of 11

17

Cuneiform nerve

18

17 triangular striking surface

19a, 19b

17 triangular surface

twenty

Burr of 17

twenty-one

Cuneiform nerve

22

Hitting surface of 21

23a-23c

21 triangular surface

24

Cuneiform nerve

25

Hitting surface of 24

26

Cover surface of 24

27a, 27b

24 side surface

L_ {1}

1-axis longitudinal

x

\ vtcortauna 1 direction of action

B_ {5}

5 width

α

\ vtcortauna Angle between 13 and L_ {1} or E_ {1}

L_ {11}

11 length

L_ {13}

13 length

L_ {13W}

Effective Length of 13

L_ {14}

Length of 14

L_ {15}

Length of 15

E_ {1}

Flat

\beta

Angle between E_ {1} and 7a or 7b

γ

Angle between E_ {1} and 6a or 6b

B_ {11}

11 width

\delta

Angle between E_ {1} and 9a, 9b, 10a, 10b

T

Tetrahedron

S

T tip

G_ {22}

22 base face

Claims (12)

1. Flat chisel (1), especially inserting chisel for drilling hammers and / or force-driven chisels for machining stone, with a chisel head (2) of blade type, which has a main blade (5) located transversely to a longitudinal axis of chisel (L1) and a striking surface (7a; 7b) front and rear, largely flat, where at least one of the striking surfaces (7a; 7b) is located a core (11) configured as a cuneiform nerve, characterized in that the soul (11) configured as a cuneiform nerve (11; 17; 21; 24) presents in the lateral view, in relation to the longitudinal axis (L1), a first segment of short striker (14), which ascends obliquely, and a support segment (15) that descends in plane with a length, which is greater than the length of the first striking segment (14), where the striking segment (14 ) is oriented towards the main blade (5) and the support segment (15) towards the stem chisel (3). 2. Flat chisel according to claim 1, characterized in that the cuneiform nerve (11) has in a frontal view on the main blade (5) of the flat chisel (1) an oblique tetrahedral rise with transverse cutting edge (13), wherein a region (15) that follows a tip (S) of a tetrahedron (T) ends in the direction of a V-shaped chisel rod (3) and approximately plane parallel to the axis. 3. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (11) has a front tetrahedral edge (11), configured as a frontal transverse cutting edge (1), with an oblique ascent angle? \ Approx 40-50 and especially α \ approx 45 °. 4. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (11) has a front striking surface (18, 22, 25) with an oblique rise angle? 40 \ 50 and especially
α \ approx 45 °. 5. Flat chisel according to one of the aforementioned claims, characterized in that the mouth (15 or 12c, 12d; 19a, 19b; 23a, 23b, 23c; 26, 17a, 17b) of the cuneiform nerve (11; 17; 21; 24 ) extends approximately the entire length of the striking surface (7a; 7b). 6. Flat chisel according to one of the aforementioned claims, characterized in that only one striking surface (7a; 7b) has at least one cuneiform nerve (11; 17; 21; 24). 7. Flat chisel according to one of the aforementioned claims, characterized in that the two striking surfaces (7a; 7b) have at least one cuneiform nerve (11; 17; 21; 24). 8. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerves (11; 17; 21; 24) are arranged symmetrically in relation to the longitudinal axis (L1). 9. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (11) has a cross-sectional edge (13), which is formed by surfaces (12a, 12b), which are located obliquely with respect to the edge of main cut (8) and obliquely with respect to the striking surface (7a; 7b). 10. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (17) has an oblique ascent in ramp with a ramp surface in a frontal view on the main blade (5) of the flat chisel (1). (18), where the ramp surface (18) is triangularly configured, and in the support segment (15) it becomes a two-water roof with triangular surfaces (19a, 19b) on the striking surface (7a , 7b). 11. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (21) has an oblique ascent in ramp with a ramp surface in a frontal view on the main blade (5) of the flat chisel (1) (22), where the ramp surface (22) is triangularly configured, and in the support segment (15) it becomes a pyramid, again with triangular surfaces (23a, 23b, 23c) on the striking surface (7a, 7b). 12. Flat chisel according to one of the aforementioned claims, characterized in that the cuneiform nerve (24) has an oblique ascent in ramp with a ramp surface in a frontal view on the main blade (5) of the flat chisel (1). (25), where the ramp surface (25) is configured rectangularly, and in the support segment (15) it is transformed with another rectangular ramp surface (26) into the striking surface (7a, 7b), where The cuneiform nerve (24) is laterally limited by triangular surfaces (27a, 27b).