CN212398159U

CN212398159U - Multistage ladder deep groove grooving cutter

Info

Publication number: CN212398159U
Application number: CN202021256669.4U
Authority: CN
Inventors: 张晓刚
Original assignee: Individual
Current assignee: Beijing Jiuming Technology Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-01-26
Anticipated expiration: 2030-07-01

Abstract

The utility model belongs to the technical field of the cutter technique and specifically relates to a multistage ladder deep groove grooving cutter, specific cutting tool who installs multistage ladder grooving on lathe that says so. The multi-step deep groove grooving tool comprises: a knife handle and a knife plate; one end of the knife handle is provided with a supporting part; the cutter handle is arranged on one side of the end face of the supporting part, and positioning keys are oppositely arranged on the side faces of the two sides of the supporting part; a positioning key arranged on one side of the supporting part is connected with the cutter handle; be equipped with multistage ladder groove on the cutting board, adjacent ladder groove linking department is equipped with the chamfer. The utility model relates to a multistage ladder deep trouth grooving cutter designs asymmetric bearing structure on the handle of a knife, does excessive chamfer processing on the ladder cell type line of ladder deep trouth sword, strengthens the rigidity of cutting board, and the cutting board rigidity reinforcing makes the cutting more steady, guarantees workpiece surface's processingquality.

Description

Multistage ladder deep groove grooving cutter

Technical Field

The utility model belongs to the technical field of the cutter technique and specifically relates to a multistage ladder deep groove grooving cutter is related to, specific installation on the lathe that says so for the cutting tool of multistage ladder grooving.

Background

The most difficult thing at present is that the strength of a cutter is poor and the cutter back-off phenomenon is serious in the process of machining the stepped deep groove; the deep groove of the step is often tapered, and the deeper the groove is, the narrower the groove is, the more serious the cutter is. The conicity that the deep groove formed does not accord with the drawing requirement, can receive the influence during product assembly and assemble not last, also influences the next process and can't go on.

The straight flute cutting tool adopted by the existing tool has the advantages that the strength of the straight flute cutting tool can be improved when a wide flute is machined, but the strength of a cutting plate for machining a stepped deep flute is weakened, and the phenomenon of serious cutter back-off occurs. The machined groove is easily affected by the strength of the cutting board, and the side wall has vibration lines, so that the subsequent repair is very difficult; the knife plate is influenced by vibration lines left in the previous process, and the tool with small machining allowance cannot cover the vibration lines and is left on the side wall of the workpiece, so that the quality is unqualified.

The types of tools used in shallow and deep machining methods are various, tools need to be repeatedly changed according to the depth when a narrow groove is machined, and the accumulated error of the new tool setting is very serious. The dimensional tolerance of the product slot is very small, which is very easy to cause the risk of processing quality.

The existing cutter uses an integral cutter handle, the strength of a cutter plate is not high due to the influence of the length of the cutter, each groove of the cutter plate is an independent cutter, and the cutter plate of a processing cutter with a narrow groove is thin and has poorer rigidity.

When the cutter is used for cutting, the cutter often vibrates and generates noise due to the fact that the cutter is very long in overhanging and insufficient in rigidity; the environment and the health of workers are influenced, and the quality of the machined surface of the workpiece cannot meet the requirements of a drawing because vibration of a cutter generates vibration lines. In order to solve the problems, a safe, efficient and high-rigidity deep groove cutter needs to be designed to replace the existing cutter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage ladder deep groove grooving cutter, this multistage ladder deep groove grooving cutter when can solving current cutting ladder deep groove cutter rigidity is not enough, produces the problem of vibration and cutter relieving in the processing.

The utility model provides a multistage ladder deep trouth grooving cutter, include: a knife handle and a knife plate; one end of the knife handle is provided with a supporting part; the cutter handle is arranged on one side of the end face of the supporting part, and positioning keys are oppositely arranged on the side faces of the two sides of the supporting part; a positioning key arranged on one side of the supporting part is connected with the cutter handle; be equipped with multistage ladder groove on the cutting board, adjacent ladder groove linking department is equipped with the chamfer.

The supporting part of the knife handle and the knife board are made into asymmetrical mounting hole positions; the support part at the lower end of the extension knife board is 20-45mm, so that the rigidity of the knife handle is extended and reinforced below the center height. Since the center of the cutting portion of the cutting plate is determined according to the center height when the cutting plate is used, the strength of the cutting plate needs to be increased by increasing the size of the lower end to increase the strength of the cutting plate. The design of the asymmetric cutting board is to change the structure that the length of the current cutting board can not be increased, and the strength of the grooving cutter is increased to reduce the vibration caused by insufficient rigidity of the grooving cutter.

Wherein, the support part is rectangular, and the length of the support part is between 115 mm and 130 mm; and a knife handle is arranged at a position, which is 60-100mm away from the shorter side, on the end surface of the supporting part.

Because the length of the supporting part is within the range of 115 plus 130mm, the positioning key is added to the existing supporting part after the supporting part at the lower end of the knife handle is lengthened, and the knife plate is better limited in the key groove.

The positioning keys are uniformly distributed on two sides of the supporting part, and the positioning keys on the two sides of the supporting part are arranged oppositely; and fixing through holes are formed in the two sides of the positioning key.

The number of the positioning keys on each side of the supporting part is increased from two to three, and the torque of the knife board is transmitted to the positioning keys more firmly and reliably.

The positioning key on the supporting part is a convex key on two sides and is matched and arranged with the key groove on the knife board, so that the functions of positioning and torque transmission are achieved; when the cutting force is too large, the cutter plate is ensured not to be loosened in the cutter handle. The offset of the cutting board can be corrected by a positioning key in the middle of the cutter handle module, and the cutting board is accurately positioned in the installation process and is not biased. The positioning key plays a positioning role in the depth direction, the knife board is limited to the high position of the center after being installed on the supporting part and can not move downwards, the accuracy of the center height of the knife board is guaranteed, and the dimensional tolerance between the positioning key and the positioning key is controlled to be high in precision of 0.02 mm.

The supporting part is fixed through a plurality of screws with the cutting board, has 3 bellied navigation key on the handle of a knife to carry out repeated location to the cutting board, and behind the supporting part was installed to the cutting board, bellied navigation key opened and carries out spacing effect to the cutting board for fixed cutting board can not become flexible.

The cutting board can be exchanged and installed according to the requirement of work piece groove in handle of a knife both sides, avoids handle of a knife body to interfere. The tool shank can be flexibly converted according to different machine tools, the tool shank is divided into a left tool plate and a right tool plate which are arranged on a horizontal lathe, and the upper tool plate and the lower tool plate are arranged when the tool shank is machined on a vertical lathe.

And the cutter plate can be fixed on the cutter handle by the fixing bolt on the cutter handle, and the supporting part of the cutter is firmer after the cutter plate is formed into a whole. The force transmitted to the cutting board is stable, and the cutting board can be well depended on the knife handle after being heightened, so that the strength of the cutting board is greatly increased, and the cutting force is larger; the vibration is naturally eliminated after the rigidity of the knife board is improved. The double-side positioning surfaces on the knife handle improve the utilization rate of the knife handle, can be changed according to the change of the use environment of the knife handle, does not need to invest in a new knife handle, can save the cost of the knife and has good economical efficiency.

Wherein, the cutting board is provided with 1-4 levels of stepped grooves.

The connection positions of the widths of the stepped grooves on the cutting board adopt a stepped chamfer transition treatment method, so that stress concentration deformation or easy fracture between the connection positions of the stepped grooves of the cutting board is avoided. The supporting and stress characteristics of the chamfer angle enable the rigidity of the cutting board to be stronger. The cutter plate is guaranteed not to be out of service when the groove is cut deeply, and the machining efficiency of the cutter plate is improved due to small deformation.

One end of the knife plate is provided with a key groove and a fixing hole, and the other end of the knife plate is provided with a blade fixing groove; the key slots and the fixing holes are alternately arranged on the knife board.

The installation positioning part of the stepped deep groove cutting board and the supporting piece is matched according to the asymmetric structure of the cutter handle, a key groove and a fixing hole are formed in the cutting board, and the size of the key groove and the size of the fixing hole are the same as that of the installation positioning part of the cutter handle.

During installation, the positioning key protruding on the knife handle is aligned, the knife plate and the knife handle are attached to each other and clamped in the key groove, and the knife plate and the knife handle are limited through the bolt.

Wherein, a blade is arranged in the blade fixing groove; the side wall of one side of the blade fixing groove is provided with a blade upper pressing tongue; the side wall on the other side is used for strengthening and supporting the blade; the bottom of the blade fixing groove is provided with an elastic deformation gap.

The blade reinforcing support is designed in an extension mode, the strength of the cutting board is provided, and the rigidity reinforcing vibration of the cutting board is reduced.

The upper pressing tongue of the blade and the blade reinforcing support are fixed through screws.

The blade reinforcing support is away from the blade fixing groove by 5-9mm and inclines inwards to one side of the knife handle by 13-17 degrees; the blade reinforcing support is inwards inclined by 10-28 degrees towards one side of the knife handle at a position 25-45mm away from the blade fixing groove.

The interference distance between the workpiece and the cutter body is staggered after the stroke inclination, so that the risk of damaging the cutter plate and the workpiece due to unsmooth chip removal and extrusion is avoided.

Wherein, the edge of the blade reinforcing support is a clearance angle with two sides inclined by 0.5-2 degrees.

The two sides of the lower part of the blade supporting rib are provided with the inclined clearance angle for treatment, the cutter has universality in workpiece cutting, and the cutter plate can be prevented from being rubbed and damaged due to the change of the diameter of the inscribed circle.

Wherein, the end of the elastic deformation gap far away from the blade fixing groove is provided with a hole with the diameter of 2-6 mm.

The installation of the blade on the cutting board needs effective pressing force, and the plastic notch on the cutting board provides the guarantee of firm clamping of the blade. The replacement of the blade is convenient.

The utility model discloses beneficial effect: a multistage ladder deep groove grooving cutter is characterized in that an asymmetric supporting structure is designed on a cutter handle, the length of a supporting piece is increased, and the radial stress part of the cutter handle is increased, so that the cutter has enough supporting strength. Excessive chamfering processing is carried out on a stepped groove-shaped line of the stepped deep groove cutter, so that the rigidity of the cutter plate is enhanced; stress concentration points on the cross section cannot be generated, so that the strength of the cutting board is integrally kept consistent; the ladder groove of cutting board links up the cross-section increase, increases the cutting board rigidity. The rigidity of the cutting board is enhanced, so that the cutting is more stable, and the processing quality of the surface of a workpiece is ensured.

The utility model relates to a multistage ladder deep trouth grooving cutter still has following beneficial effect:

1. the step shape of the cutter can solve the problem of working hour waste of repeated processing by using the least cutter, and the efficiency of processing deep grooves is improved to more than 60 percent. The cutter can adopt a profiling method to correct the width and the depth direction of the stepped deep groove, and the problem of groove interval deviation caused by machine tool errors is solved. Meanwhile, the error generated by the tool setting is solved, and the accumulated error is reduced, so that the deep groove machining is very simple.

2. The step deep groove slotting cutter changes the traditional cutting mode, the rigidity of the cutter is increased, the consumption cost of the cutter is reduced by only 25 percent of the cost of the former cutter. The manufacturing cost of the cutter is reduced by the double-sided installation of the cutter handle, the interchangeability of the cutter plate is very strong, the cutter plate can be flexibly installed on two sides of the cutter plate, the cutter plate can be quickly and accurately assembled and installed under any condition, and the manual operation cost is saved. The cutting board can be a single-head or double-head blade, and can deal with grooving processing in different environments.

3. The blade adopts a standard grooving blade on the market, so that the economy and the replaceability are strong; the cutting tool can be selected according to different materials, the service life of the cutting blade is prolonged, the existing cutting tool can be replaced by the new cutting tool after the design is completed, the production efficiency is improved, the correction man-hour caused by the vibration of the cutting tool is saved, and 28 hours are saved when one workpiece is expected to be machined. The cutting parameter is improved by 55 percent compared with the original cutting parameter. The vibration of the cutter is reduced, and the surface quality of the workpiece is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a tool shank of a multi-step deep groove grooving tool of the present invention;

FIG. 2 is a side view of the shank of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a schematic view of a cutting board of the multi-step deep groove grooving tool of the present invention;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a bottom view of FIG. 4;

FIG. 7 is an enlarged view of a portion of FIG. 4;

FIG. 8 is an enlarged view of a portion of the blade of FIG. 4 in the form of a single-ended blade;

FIG. 9 is a front view of a secondary grooving tool of the multi-step deep grooving tool of the present invention;

FIG. 10 is a side view of a secondary grooving tool of the multi-step deep grooving tool of the present invention

FIG. 11 is a front view of a three-stage grooving tool of the multi-stage stepped deep groove grooving tool of the present invention;

FIG. 12 is a side view of a three-step grooving tool of the multi-step deep groove grooving tool of the present invention;

FIG. 13 is a front view of a four-stage grooving tool of the multi-stage stepped deep groove grooving tool of the present invention;

FIG. 14 is a side view of a four-stage grooving tool of the multi-stage stepped deep groove grooving tool of the present invention;

FIG. 15 is a schematic view of the multistage stepped deep groove grooving tool of the present invention;

fig. 16 is a schematic view of a combination of the multi-step deep groove cutting tool of the present invention.

Description of reference numerals:

1: a knife handle; 2: a cutting board; 3: a support portion; 4: a positioning key; 5: a stepped groove; 6: chamfering; 7: a fixing through hole; 8: a keyway; 9: a fixing hole; 10: a blade; 11: pressing the tongue on the blade; 12: strengthening and supporting the blade; 13: an elastic deformation notch; 14: a blade-securing slot.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "radial", "axial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 16, a multi-step deep groove cutting tool includes: a knife handle 1 and a knife plate 2; one end of the knife handle 1 is provided with a supporting part 3; the cutter handle 1 is arranged on one side of the end face of the supporting part 3, and positioning keys 4 are oppositely arranged on the side faces of the two sides of the supporting part 3; a positioning key 4 arranged on one side of the supporting part 3 is connected with the knife handle 1; be equipped with multistage ladder groove 5 on the cutting board 2, adjacent ladder groove 5 junction department is equipped with chamfer 6.

Specifically, the support part 3 is rectangular, and the length of the support part 3 is 115-130 mm; a knife handle 1 is arranged at the position, which is 60-100mm away from the shorter side, on the end surface of the supporting part 3.

The knife handle 1 and the supporting part 3 are of an integrated structure.

The length of the supporting part 3 is increased by 33mm on the basis of the existing supporting part, and the length of the supporting part 3 is preferably 123 mm.

An asymmetric supporting part 3 structure is designed on the cutter handle 1, and the distance between the center height of the cutter handle 1 on the supporting part 3 and the bottom of the supporting part is 78 mm. The height distance of the center of the support part is increased to 78mm from the traditional knife handle.

Design 3 structures of asymmetric supporting part on handle of a knife 1, when the lathe work, the effort when handle of a knife 1 drives 2 cutting of cutting board and removes changes, and the radial atress part of handle of a knife 1 increases for support intensity grow, the rigidity of cutting board 2 can strengthen.

Specifically, the number of the positioning keys 4 is multiple, and the positioning keys 4 are uniformly distributed on two sides of the support part 3; the two sides of the positioning key 4 are provided with fixing through holes 7.

The length of supporting part 3 is elongated, and the quantity of the navigation key 4 of supporting part 3 every side is three, and through three bellied navigation key 4 come better with 2 spacing keyways 8 of cutting board, the moment of torsion transmission of cutting board 2 can be more firm reliable to three navigation key 4. The stability of the forces transmitted to the cutting plate 2 is improved.

Specifically, the cutting board 2 is provided with a 1-4 step groove 5.

The knife plate 2 is preferably provided with 4-step grooves 5, and the chamfer angle 6 of the adjacent step grooves 5 is preferably 135 degrees.

The 135-degree transition angle enables the connecting section of the cutting board 2 to be increased, the rigidity of the cutting board 2 cannot be reduced, the cutting is more stable after the rigidity of the cutting board 2 is enhanced due to the increase of the area of the blade reinforcing support 12, and the processing quality of the surface of a workpiece is guaranteed.

A 1-stage step groove, a 2-stage step groove, a 3-stage step groove and a 4-stage step groove are sequentially arranged between the blade 10 far away from the key groove 8 and the fixing hole 9; the insert 10 is disposed on the 4-step groove (if the knife plate 2 is the 4-step groove 5).

Specifically, one end of the knife plate 2 is provided with a key groove 8 and a fixing hole 9, and the other end is provided with a blade fixing groove 14; the key grooves 8 and the fixing holes 9 are alternately arranged on the cutter plate 2.

The cutting board 2 is mutually limited through the key slot 8 and the positioning key 4, and is locked and fixed through the fixing hole 9 and the fixing through hole 7 through a bolt.

A blade 10 for cutting is fixed in the blade fixing groove 14.

Specifically, the blade fixing groove 14 is internally provided with a blade 10; the side wall of one side of the blade fixing groove 14 is provided with a blade upper pressing tongue 11; the other side wall is provided with a blade reinforcing support 12; the bottom of the blade holding groove 14 is provided with an elastically deformable notch 13.

Tightening the insert 10 by means of the bolt locking insert upper tang 11 and the insert reinforcing support 12 generates effective compressive force on the insert 10. The elastically deformed notch 13 is a guarantee for the blade 10 to be firmly clamped.

The blade fixing groove 14 is provided at the center height of the knife plate 2.

The elastic deformation notch 13 is used for drilling a hole on the cutting board 2 in an elastic deformation mode, and cuts the clamping part of the blade 10 along the center of the hole.

Specifically, the blade upper tongue 11 and the blade reinforcing support 12 are fixed by screws.

Specifically, the blade reinforcing support 12 is inclined inwards by 13-17 degrees towards one side of the knife handle 1 at a position which is 5-9mm away from the blade fixing groove 14; the blade reinforcing support 12 is inclined inwards by 10-28 degrees towards one side of the knife handle 1 again at a distance of 25-45mm away from the blade fixing groove 14.

The blade reinforcing support 12 is inclined inwards by 15 degrees towards one side of the knife handle 1 at a position which is away from the blade fixing groove 14 and is 7.5mm away; the blade reinforcing support 12 is again angled inwardly 18 degrees to the side of the handle 1 away from the blade retaining groove 14 by a distance of 33 mm. The interference distance between the workpiece and the cutter body is staggered after the stroke inclination, so that the risk of damaging the cutter plate 2 and the workpiece due to unsmooth chip removal and extrusion is avoided.

Specifically, the edge of the blade reinforcing support 12 is inclined at a rear angle of 0.5 to 2 degrees on both sides.

The blade reinforcing support 12 carries out back angle treatment of 1 degree of bilateral inclination, and the scratch on the cutting board 2 caused by the size change of the diameter of the inscribed circle is avoided.

Specifically, one end of the elastic deformation notch 13, which is far away from the blade fixing groove 14, is provided with a hole with the diameter of 2-6 mm.

One end of the elastic deformation notch 13, which is far away from the blade fixing groove 14, is provided with a hole of 4mm, and the lower part of the elastic deformation notch deviates 2mm along the center of the hole and cuts a clamping part of the blade 10 to form a notch.

The blade 10 is affected by the local stress of the knife board 2, the elastic deformation gap 13 can be deformed and opened, and then a positioning groove for the blade 10 is arranged at the clamping and positioning position of the blade 10 according to the requirement of the blade fixing groove 14. The upper blade pressing tongue 11 is pressed by a pressing screw, and the upper blade pressing tongue 11 is attached to the blade 10 and then fixed in the positioning groove of the blade 10. When the blade 10 is replaced, the upper tongue-depressing compression screw is loosened, the blade 10 can be taken out, the upper tongue-depressing compression screw avoids the leakage of the screw, otherwise, the screw is worn by scrap iron and cannot be detached well, and the screws on the knife board 2 are all sunk into the upper tongue-depressing.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A multi-stage stepped deep groove grooving tool, comprising: a knife handle (1) and a knife board (2); one end of the knife handle (1) is provided with a supporting part (3); the cutter handle (1) is arranged on one side of the end face of the supporting part (3); positioning keys (4) are oppositely arranged on the side surfaces of the two sides of the supporting part (3); a positioning key (4) arranged on one side of the supporting part (3) is connected with the knife handle (1); be equipped with multistage ladder groove (5) on cutting board (2), adjacent ladder groove (5) link up the department and are equipped with chamfer (6).

2. The multi-stage step deep groove grooving tool as claimed in claim 1, wherein the support portion (3) is rectangular, and the length of the support portion (3) is between 115 mm and 130 mm; a knife handle (1) is arranged at a position, which is 60-100mm away from the shorter side, on the end surface of the supporting part (3).

3. The multi-stage step deep groove grooving tool according to claim 1, wherein the number of the positioning keys (4) is plural, and the positioning keys (4) are uniformly distributed on both sides of the support portion (3); and fixing through holes (7) are formed in the two sides of the positioning key (4).

4. The tool according to claim 1, wherein the cutting plate (2) is provided with 1-4 steps of grooves (5).

5. The multi-step deep groove grooving tool according to claim 1, wherein the cutting plate (2) is provided with a key groove (8) and a fixing hole (9) at one end and a blade fixing groove (14) at the other end; the key grooves (8) and the fixing holes (9) are alternately arranged on the knife board (2).

6. The multi-stage deep step groove cutting tool according to claim 5, wherein a blade (10) is provided in the blade holding groove (14); the side wall of one side of the blade fixing groove (14) is provided with a blade upper pressing tongue (11); the other side wall is provided with a blade reinforcing support (12); the bottom of the blade fixing groove (14) is provided with an elastic deformation gap (13).

7. The multi-stage deep groove cutting tool according to claim 6, wherein the upper blade spatula (11) and the blade reinforcing support (12) are fixed by screws.

8. The multi-stage step deep groove cutting tool as claimed in claim 6, wherein the blade reinforcing support (12) is inclined inward by 13-17 degrees to one side of the shank (1) at a position 5-9mm away from the blade fixing groove (14); the blade reinforcing support (12) is inclined inwards by 10-28 degrees towards one side of the knife handle (1) at a position 25-45mm away from the blade fixing groove (14).

9. The multi-step deep groove grooving tool according to claim 6, wherein the edge of the insert reinforcing support (12) is laterally beveled on both sides with a clearance angle of 0.5-2 degrees.

10. The tool according to claim 6, wherein the elastically deformable indentation (13) is provided with a 2-6mm hole at the end facing away from the blade holding groove (14).