CN213195945U - Swallow tail chamfering tool - Google Patents

Abstract

The utility model discloses a forked tail chamfer cutter relates to cutter technical field for the screw hole processing, include: the tool comprises a tool handle and a tool bit formed at the end part of the tool handle. The tool bit includes the connecting portion with handle of a knife one end rigid coupling, and locate the cutting portion that connecting portion kept away from handle of a knife one end, the cutting portion is the dovetail type, be the first cutting edge that the contained angle set up including a pair of axis with the handle of a knife, and locate the levogyration helicla flute between two adjacent first cutting edges, be used for the chip removal through setting up the levogyration helicla flute, the chip removal direction of current dextrorotation helicla flute has been changed, make the piece by the handle of a knife to tool bit direction chip removal, last round tooth is because piece effect extrusion deformation when having avoided attacking tooth back chamfer, perfect attack the tooth process, the work efficiency and the product quality of cutter have been improved. The utility model provides a high, long service life's forked tail chamfer cutter of tapping quality.

Description

Swallow tail chamfering tool

Technical Field

The utility model relates to a cutter technical field is used in the screw hole processing, concretely relates to forked tail chamfer cutter.

Background

In apron single face processing screw hole in-process, the apron assembly yields is that the screw rod pierces through the screw hole completely, but in prior art's the tooth in-process of attacking, because the screw rod can't pierce through the screw hole, consequently cause apron card silk often, lead to production to stop the line, need manual tooth of returning to remedy to some projects need electroplate again, have reduced machining efficiency. The main reason is that the cutter is not tapping in place and does not tap a threaded hole; on the other hand, external force extrusion is carried out after tapping, the orifice of the tooth hole is deformed, the aluminum scrap discharging direction is the inner side of the product hole during machining, the scrap discharging direction of the cutter is extruded into the hole during final chamfering, the last circle of teeth are extruded and deformed, and the service life of the cutter is shortened.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the chamfer cutter among the prior art and easily will last round tooth extrusion deformation, lead to the screw rod can't pierce through the screw hole, reduce the life's of cutter defect to a forked tail chamfer cutter is provided.

In order to solve the technical problem, the utility model provides a forked tail chamfer cutter, include:

a knife handle; the cutter head is formed at the end part of the cutter handle, and comprises a connecting part fixedly connected with one end of the cutter handle and a cutting part arranged at one end of the cutter handle, wherein the cutting part comprises at least one pair of first cutting edges and two adjacent left-handed spiral grooves, and the first cutting edges are arranged at included angles with the axis of the cutter handle. The included angle between the first cutting edge surface of the first cutting edge close to the connecting part and the inner wall of the left-handed spiral groove is smaller than 90 degrees.

The included angle between the first cutting edge surface and the inner wall of the left-handed spiral groove is 30-60 degrees.

The cutting part is dovetail-shaped.

The connecting portion is a cylinder, and the maximum length of the cutting portion in the direction perpendicular to the axis of the tool holder is larger than the diameter of the connecting portion.

The cutting part further comprises a second blade formed at one end, far away from the connecting part, of the cutting part, the first blade further comprises a second cutting blade face far away from the first cutting blade face, and the second blade is connected with a pair of the second cutting blade faces which are oppositely arranged.

The second cutting edge is perpendicular to the axis of the knife handle.

The left-handed spiral groove extends from the second blade to the connecting portion.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a forked tail chamfer cutter, including handle of a knife and the tool bit of shaping in the tip of handle of a knife, the tool bit includes the connecting portion with handle of a knife one end rigid coupling, and locate connecting portion and keep away from the cutting portion of handle of a knife one end, the cutting portion includes that at least a pair of axis with the handle of a knife is the first cutting edge of contained angle setting, and locate the levogyration helicla flute between two adjacent first cutting edges, be used for the chip removal through setting up the levogyration helicla flute, the chip removal direction of current dextrorotation helicla flute has been changed, make the piece by the handle of a knife to tool bit direction chip removal, last round tooth is because piece effect extrusion deformation when having avoided attacking tooth back chamfer, perfect attack the tooth process, the. The included angle between the first cutting edge surface of the first cutting edge close to the connecting part and the inner wall of the left-handed spiral groove is smaller than 90 degrees and is an acute angle, the contact surface between the cutter and a threaded hole is smaller during cutting, the generated heat is low, the service life of the cutter is prolonged, and the times of cutter replacement are reduced.

2. The utility model provides a forked tail chamfer cutter, cutting portion are the forked tail type, and connecting portion are the cylinder, and cutting portion is greater than the diameter of connecting portion at the ascending maximum length of axis direction of perpendicular to handle of a knife, and the tooth drilling is attacked to the tool bit of being convenient for.

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 structural view of a dovetail chamfering tool of the present invention;

FIG. 2 is a schematic view of the tool tip configuration shown in FIG. 1;

description of reference numerals:

1. a first blade; 2. a first cutting edge face; 3. a second cutting edge face; 4. a second blade; 5. a left-handed helical groove; 6. a connecting portion; 7. a knife handle; 8. a transition portion.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, 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 should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 and 2 show a specific embodiment of the dovetail chamfering tool provided by the present invention, including: the tool comprises a tool shank 7 and a tool bit formed at the end part of the tool shank 7, wherein the tool shank 7 and the tool bit are integrally machined and formed.

The tool bit includes connecting portion 6 with 7 one end rigid couplings of handle of a knife and locates connecting portion 6 and keep away from the cutting portion of 7 one ends of handle of a knife, and the cutting portion is the dovetail, including a pair of first cutting edge 1 that is the contained angle setting with the axis of handle of a knife 7, and locate the levogyration helicla flute 5 between two first cutting edges 1. The pair of first knife edges 1 are symmetrically arranged and can simultaneously perform tapping and chamfering on the threaded holes; the left-handed spiral grooves 5 are also oppositely arranged, cutting chips can be discharged simultaneously through the two left-handed spiral grooves 5, and the chip removal rate and the service life of the cutter are improved. Through setting up the levogyration helicla flute and being used for the chip removal, changed the chip removal direction of current dextrorotation helicla flute for the piece is by handle of a knife to tool bit direction chip removal, and last round tooth is because the piece piles up effect extrusion deformation when having avoided attacking tooth back chamfer, has perfected and has attacked the tooth process, has improved the work efficiency and the product quality of cutter.

Specifically, the included angle between the first cutting edge surface 2 of the first cutting edge 1 close to the connecting part 6 and the inner wall of the left-handed spiral groove 5 is smaller than 90 degrees and is an acute angle, for example, 30 degrees to 60 degrees, so that the contact surface with a threaded hole is smaller during cutting of a cutter, the generated heat is low, the service life of the cutter is prolonged, and the times of cutter replacement are reduced.

The cutting part also comprises a second cutting edge 4 which is formed at one end, far away from the connecting part 6, of the cutting part, the second cutting edge 4 is perpendicular to the axis of the cutter handle 7, the workpiece face contacted with the cutter head can be conveniently cut during tapping, and hole forming is facilitated. The first cutting edge 1 is provided with a second cutting facet 3 at a position distant from the first cutting facet 2, and the second cutting edge 4 joins the pair of oppositely arranged second cutting facets 3, thereby forming a dovetail-shaped insert. Levogyration helicla flute 5 extends to connecting portion 6 from second cutting edge 4, has enlarged clastic storage space, has avoided because the process velocity is too fast, and a large amount of clastics can not in time discharge and cause the secondary extrusion to the interior tooth of screw hole.

The connecting part 6 is a cylinder and is suitable for the cutter to do rotary motion along the axis; the maximum length of the cutting part in the axial direction perpendicular to the tool shank 7 is larger than the diameter of the connecting part 6, the diameter of the cutting surface of the tool is larger than the diameter of the connecting part 6, the connecting part 6 can conveniently and smoothly extend into a drilled hole in the tapping process, and the extrusion to the inside of a threaded hole is reduced.

Because the diameter of handle of a knife 7 is greater than the diameter of connecting portion 6, for making things convenient for processing cutter integrated into one piece, be equipped with transition portion 8 at handle of a knife 7 and connecting portion 6, transition portion 8 is processed into the round platform shape, and the big head end of round platform shape transition portion 8 is connected with handle of a knife 7, and the little head end is fixed with connecting portion 6.

When tapping the cutter and using, make tool bit axis perpendicular with the work piece face of treating processing, rotate handle of a knife 7 to promote forward, the tooth process is attacked to the cutter, and left-handed helicla flute 5's setting can make the piece by the handle of a knife to tool bit direction chip removal, and last round tooth is because the piece piles up the extrusion deformation who causes when having avoided attacking the back chamfer, has perfected and has attacked the tooth process, has improved the work efficiency and the product quality of cutter.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (7)

1. A dovetail chamfering tool, comprising:

a knife handle (7);

the cutter head is formed at the end part of the cutter handle (7) and comprises a connecting part (6) fixedly connected with one end of the cutter handle (7) and a cutting part arranged at one end, far away from the cutter handle (7), of the connecting part (6), and the cutting part comprises at least one pair of first cutting edges (1) arranged at an included angle with the axis of the cutter handle (7) and a left-handed spiral groove (5) arranged between every two adjacent first cutting edges (1); the included angle between the first cutting edge surface (2) of the first cutting edge (1) close to the connecting part (6) and the inner wall of the left-handed spiral groove (5) is smaller than 90 degrees.

2. Dovetail chamfering tool according to claim 1, characterized in that the angle of the first cutting edge face (2) to the inner wall of the left-handed helical flute (5) is 30-60 °.

3. A dovetail chamfering tool according to claim 1 or 2, wherein the cutting portion is dovetail-shaped.

4. Dovetail chamfering tool according to claim 3, characterized in that the connection portion (6) is a cylinder, the maximum length of the cutting portion in the direction perpendicular to the axis of the shank (7) being larger than the diameter of the connection portion (6).

5. A dovetail chamfering tool according to claim 1 or 2, characterized in that the cutting portion further comprises a second cutting edge (4) formed on an end of the cutting portion remote from the connecting portion (6), the first cutting edge (1) further comprising a second cutting facet (3) disposed remote from the first cutting facet (2), the second cutting edge (4) joining an oppositely disposed pair of the second cutting facets (3).

6. Dovetail chamfering tool according to claim 5, characterized in that the second cutting edge (4) is perpendicular to the axis of the shank (7).

7. Dovetail chamfering tool according to claim 5, characterized in that the left-hand spiral groove (5) extends from the second cutting edge (4) to the connecting portion (6).

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