CN216138163U

CN216138163U - Multi-blade and multi-step welding sheet type countersink cutter

Info

Publication number: CN216138163U
Application number: CN202121607498.XU
Authority: CN
Inventors: 咸志鹏
Original assignee: Jiangmen Zhongdao Precision Technology Co ltd
Current assignee: Jiangmen Zhongdao Wentu Precision Technology Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-03-29
Anticipated expiration: 2031-07-15

Abstract

The utility model discloses a multi-edge multi-step welding piece type countersink cutter which comprises a handle part and a step type cutting part, wherein the step type cutting part is provided with a plurality of step type cutter grooves and step type alloy blades, the step type cutter grooves axially extend from the front end of the step type cutting part to the handle part, the step type alloy blades are welded on one side, facing to the cutting rotating direction, of the step type cutter grooves, the step type alloy blades radially protrude out of the periphery of a chip discharge groove to form a peripheral edge, the step type alloy blades axially protrude out of the front end of the chip discharge groove to form an end edge, the outer diameter of the peripheral edge is increased in a step mode from the front end of the peripheral edge to the handle part, the peripheral edge is sequentially provided with an arc surface and a relief angle from the cutting edge to one side of a rear cutter surface, the width of the arc surface is 0.7-0.9 mm, and the relief angle is 17-19 degrees. The utility model can realize the multi-purpose processing effect of one knife, meets the processing requirements of round holes or stepped holes with different apertures, and has the advantages of long service life, good processing quality and high efficiency.

Description

Multi-blade and multi-step welding sheet type countersink cutter

Technical Field

The utility model belongs to the technical field of machining cutters, and particularly relates to a multi-blade and multi-step welding sheet type countersink cutter.

Background

The spot facing cutter is a processing tool for scraping the end face of a hole processed on a workpiece or cutting a conical and cylindrical counter bore. The counter boring cutter that generally uses at present can only process the diameter in a hole at every turn, and when processing the work piece that has a plurality of shoulder holes, not only process time is long, frequently changes the cutter moreover, causes the form and position tolerance between two step faces of shoulder hole big, and the assurance that the axiality can not be fine, and the machining precision is low, and is inefficient, appearance of problem such as with high costs.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multi-blade and multi-step welding sheet type countersink cutter which can realize a multi-purpose machining effect of one cutter, meet the machining requirements of round holes or stepped holes with different apertures, and has the advantages of long service life, good machining quality and high efficiency.

In order to achieve the above object, the present invention provides a multi-blade multi-step blade type countersink comprising a shank and a step type cutting part, wherein the step type cutting part is provided with a plurality of step type cutter grooves and step type alloy blades axially extending from the front end to the shank, the step type alloy blades are welded on one side of the step type cutter grooves facing to the cutting rotation direction, the step type alloy blades radially protrude out of the periphery of the step type cutter grooves to form peripheral blades, the step type alloy blades axially protrude out of the front end of the step type cutter grooves to form end blades, the outer diameters of the peripheral blades are increased in a step type from the front end to the shank, the peripheral blades are sequentially provided with an arc surface and a relief angle from the cutting edge to the rear cutter surface side, the width of the arc surface is 0.7mm to 0.9mm, and the relief angle is 17 degrees to 19 degrees.

In a preferred embodiment of the present invention, the height of the cutting edge of the peripheral edge is 0.3mm to 0.4mm from the center.

As a preferable scheme of the utility model, each step excircle of the stepped cutting part is respectively provided with an inverted cone, and the inverted cone is (0.012-0.018): 15.

in a preferred embodiment of the present invention, a chamfer is provided at a sharp corner of a front end of the peripheral edge, and the chamfer is C1.

In a preferred embodiment of the present invention, the stepped cutting portion has a two-step structure, and a first cutting portion, a second cutting portion, and a third cutting portion are provided in this order from a tip end thereof to the shank portion.

In a preferred embodiment of the present invention, the first cutting portion has an outer diameter of 30mm to 33 mm.

In a preferred embodiment of the present invention, the second cutting portion has an outer diameter of 35mm to 39 mm.

In a preferred embodiment of the present invention, the third cutting portion has an outer diameter of 44mm to 50 mm.

In a preferred embodiment of the present invention, the thickness of the stepped alloy blade is 2mm to 4 mm.

As a preferable aspect of the present invention, there are 4 stepped sipes and 4 stepped alloy blades.

Compared with the prior art, the multi-blade and multi-step welding sheet type countersink tool provided by the utility model has the beneficial effects that:

(1) according to the utility model, through the design of the stepped cutting part, a multi-purpose machining effect can be realized, the machining requirements of round holes or stepped holes with different apertures are met, a large amount of machining time and tool setting time are saved, the form and position tolerance precision between two stepped surfaces is greatly improved, the coaxiality of the machined stepped holes is effectively ensured, and the product quality is improved;

(2) the multi-blade structure formed by the alloy blades improves the service life and the processing efficiency of the cutter;

(3) according to the utility model, the arc surface and the relief angle are sequentially arranged on one side of the peripheral edge towards the rear cutter surface, and compared with the traditional relief angle plane, the design of the arc surface can enhance the support property and firmness of the edge, prolong the service life of the cutter, and has stable processing precision and good surface quality of the processed product; and the back angle is designed to be 17-19 degrees, so that the sufficient rigidity of the peripheral blade can be ensured, meanwhile, a sufficient avoiding space is provided for the peripheral blade, the contact area between the back blade surface of the peripheral blade and the workpiece processing surface is reduced, and the cutting-in of the peripheral blade is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

FIG. 1 is a front view of a multi-blade multi-step sheet countersink provided by the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of the structure shown in FIG. 1;

FIG. 3 is a cross-sectional view taken in the direction B-B in the configuration shown in FIG. 1;

fig. 4 is a cross-sectional view taken along line C-C in the configuration shown in fig. 1.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the machine or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

As shown in fig. 1 to 4, a multi-blade multi-step countersink according to a preferred embodiment of the present invention, which comprises a handle part 1 and a step-shaped cutting part 2, wherein the step-shaped cutting part 2 is provided with a plurality of step-shaped cutter grooves 21 and step-shaped alloy blades 22 which axially extend from the front end to the handle part 1, the stepped alloy blade 22 is welded to one side of the stepped sipe 21 in the cutting rotation direction, the stepped alloy blade 22 radially protrudes from the outer periphery of the stepped knife groove 21 to form a peripheral edge 221, the stepped alloy blade 22 axially protrudes from the front end of the stepped knife slot 21 to form an end edge 222, the outer diameter of the peripheral edge 221 is increased stepwise from the front end to the shank 1, the peripheral edge 221 is provided with an arc surface 223 and a relief angle 224 in sequence from the cutting edge to the flank face side, the width of the arc surface 223 is 0.7 mm-0.9 mm, and the back angle 224 is 17 degrees-19 degrees.

Therefore, the multi-edge and multi-step welding sheet type countersink provided by the embodiment of the utility model has the key points that: firstly, through the design of the stepped cutting part 2, the multi-purpose machining effect of one step can be realized, the machining requirements of round holes or stepped holes with different apertures are met, a large amount of machining time and tool setting time are saved, the form and position tolerance precision between two stepped surfaces is greatly improved, the coaxiality of the machined stepped holes is effectively ensured, and the product quality is improved; secondly, the service life and the processing efficiency of the cutter are improved through a multi-edge structure formed by the alloy blades; thirdly, the arc surface 223 and the relief angle 224 are sequentially arranged on one side of the cutting edge of the peripheral edge 221, and compared with a traditional relief angle plane, the design of the arc surface 223 can enhance the support and firmness of the cutting edge, the service life of the cutter is prolonged, the processing precision is stable, and the surface quality of a processed product is good; the relief angle 224 is designed to be 17 to 19 degrees, so that the peripheral edge 221 can be ensured to have sufficient rigidity, and meanwhile, a sufficient clearance space is provided for the peripheral edge 221, so that the contact area between the flank face of the peripheral edge 221 and the workpiece machining surface is reduced, and the cutting of the peripheral edge 221 is facilitated.

Illustratively, the cutting edge height center of the peripheral edge 221 is 0.3mm to 0.4mm (as indicated by "h" in fig. 2 to 4). Such a design can enhance the support and firmness of the peripheral edge 221, and has a long service life, a stable processed aperture, and excellent surface roughness.

Illustratively, each step outer circle of the stepped cutting part 2 is provided with a back taper with a large front end outer diameter and a small rear end outer diameter, so that friction between the peripheral edge 221 and the hole wall can be reduced, abnormal scraping between the peripheral edge 221 and the hole wall when the center of the tailstock of the machine tool deviates from the center slightly to increase the roughness of the hole wall is avoided, and the machining stability is maintained. In the embodiment, the taper of the inverted cone is (0.012-0.018): 15.

illustratively, a chamfer 225 is arranged at a sharp corner of the front end of the peripheral edge 221, and the chamfer 225 is preferably C1. The chamfer 225 can overcome the defects of too fast abrasion of sharp-angled cutters and short service life of the cutters.

Illustratively, the stepped cutting portion 2 has a two-step structure, and a first cutting portion 2a, a second cutting portion 2b, and a third cutting portion 2c are provided in this order from the front end toward the shank portion 1. In the present embodiment, the outer diameter of the first cutting portion 2a is 30mm to 33 mm; the outer diameter of the second cutting part 2b is 35 mm-39 mm; the third cutting portion 2c has an outer diameter of 44mm to 50 mm.

Illustratively, in order to ensure the strength and the shock resistance of the stepped alloy blade 22, the thickness of the stepped alloy blade 22 is 2mm to 4 mm.

Illustratively, there are 4 stepped sipes 21 and 4 stepped alloy blades 22.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The multi-edge multi-step welding piece type countersink cutter is characterized by comprising a handle part and a step type cutting part, wherein the step type cutting part is provided with a plurality of step type cutter grooves and step type alloy blades, the step type cutter grooves axially extend from the front ends of the step type cutting part to the handle part, the step type alloy blades are welded on one sides of the step type cutter grooves towards the cutting rotating direction, the step type alloy blades radially protrude out of the periphery of the step type cutter grooves to form peripheral edges, the step type alloy blades axially protrude out of the front ends of the step type cutter grooves to form end edges, the outer diameters of the peripheral edges are increased in a step mode from the front ends of the peripheral edges to the handle part, the peripheral edges are sequentially provided with arc surfaces and relief angles from the cutting edges to one side of a rear cutter face, the width of each arc surface is 0.7-0.9 mm, and the relief angles are 17-19 degrees.

2. The multi-blade and multi-step blade type countersink according to claim 1, wherein the height center of the cutting edge of said peripheral edge is 0.3 mm-0.4 mm.

3. The multi-blade and multi-step welding sheet type countersink tool according to claim 1, wherein each step excircle of the stepped cutting part is provided with an inverted cone, and the inverted cone is (0.012-0.018): 15.

4. the multi-edge multi-step fin-type countersink according to claim 1, wherein a chamfer is provided at a sharp corner of a front end of said peripheral edge, and said chamfer is C1.

5. The multi-blade multi-step fin-type countersink according to claim 1, wherein said stepped cutting portion has a two-step structure, and a first cutting portion, a second cutting portion and a third cutting portion are provided in this order from a front end thereof to a shank portion thereof.

6. The multi-blade multi-step fin-type countersink according to claim 5, wherein an outer diameter of said first cutting portion is 30mm to 33 mm.

7. The multi-blade multi-step fin-type countersink according to claim 5, wherein an outer diameter of said second cutting portion is 35mm to 39 mm.

8. The multi-blade multi-step fin-type countersink according to claim 5, wherein an outer diameter of said third cutting portion is 44mm to 50 mm.

9. The multi-blade multi-step fin-type countersink according to claim 1, wherein said stepped alloy blade has a thickness of 2mm to 4 mm.

10. A multi-blade multi-step countersink according to any one of claims 1 to 9, wherein said step-shaped recess and said step-shaped alloy blade are provided in 4 number.