WO2011140830A1

WO2011140830A1 - Guiding composite cutting tap with different diameters

Info

Publication number: WO2011140830A1
Application number: PCT/CN2011/000846
Authority: WO
Inventors: 李仕清
Original assignee: Li Shiqing
Priority date: 2010-05-14
Filing date: 2011-05-16
Publication date: 2011-11-17
Also published as: CN102179576A

Abstract

A guiding composite cutting tap with different diameters is disclosed. The composite cutting tap comprises a screw blade (1) and a screw shank (2). The screw blade (1) is connected with the screw shank (2), or the screw blade (1) and the screw shank (2) are integrally formed. The screw blade (1) is integrally provided with a plurality of screw blade strips (3). Each screw blade strip (3) is provided with a cutting edge surface (6) at the front surface. The angle between the cutting edge surface (6) on chamfer portion (4) of each screw blade strip (3) and a tangent of a concentric circle is larger than the angle between a back cutting edge surface (6) and the tangent of the concentric circle. The diameter of a screw blade bottom (10) at the chamfer portion (4) is less than the diameter of a back screw blade bottom (10). A radiating table (8'') is provided on the cutting edge surface (6) of each screw blade strip (3). In addition to the heat radiating function, the cutting edge surface (6) having the radiating table (8'') also improves the processing efficiency, increases the stability of the cutting and extends the service life of the tap.

Description

Split diameter guided composite cutting tap

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a tap, and more particularly to a split-diameter composite cutting tap, which is used for wire hole machining of a workpiece in machining. Background technique

At present, the spiral tap or straight groove tap used in machining is composed of a wire blade body and a wire shank, and the wire blade body is composed of a wire blade and a cutting edge face, a wire edge, a chamfering, a chamfering blade, etc. The cutting edge surface of the chamfering edge is substantially on a curved surface or the same spiral surface, and the wire bottom connection of each wire edge strip is substantially in a straight line or a spiral, because the distance from the top of the wire to the bottom of the wire is too small at the chamfered portion As a result, the guiding effect is not achieved. As a result, the tapping becomes a reaming, which causes the workpiece to be scrapped. Moreover, since the wire surface of each group is composed of a single surface, when the angle between the cutting edge and the top of the wire is too sharp, the wire edge is easy. Fracture, such as cutting edge and overall fracture in the workpiece, causing damage or even scrapping of the workpiece, the content of the invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a split-direction guided composite cutting wire which is easy to position, has high heat dissipation efficiency, is resistant to abrasion, and has a long life.

In order to achieve the above object, the present invention adopts the following technical solutions: Technical Solution 1:

A split-diameter composite cutting tap includes a wire blade body and a wire handle, the wire blade body and the wire handle are integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, and each of the wire edge strips has a cutting front a blade surface characterized by a chamfer at each wire edge

Water The angle between the cutting edge and the tangent of the concentric circle at the top of the wire is greater than the angle between the cutting edge of the rear portion and the tangent of the concentric circle at the top of the wire.

Preferably, the angle between the cutting edge of each of the wire edge strips of the split-direction composite cutting tap and the tangent of the concentric circle at the top of the wire is at least the wire edge at the chamfered portion of the front portion. And the latter part of the wire blade is composed of two parts.

Preferably, the wire bottom diameter of the cutting wire edge of the split-directed composite cutting tap is formed by at least two different sized wire bottom diameters.

Preferably, the line of the wire bottom of the cutting wire edge of the split-direction composite cutting tap on the cutting edge is distributed over at least two different straight lines or spirals. Technical Solution 2:

A split-diameter composite cutting tap includes a wire blade body and a wire handle, the wire blade body and the wire handle are integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, and each of the wire edge strips has a cutting front a blade surface, characterized in that a part or all of the cutting edge surface of each wire edge strip is machined into one piece to form a small wire blade face, and the wire edge face is not in the same direction as the cutting edge face or the connected chip groove wall Surface or spiral surface.

Preferably, the cutting edge between the top of the split-guided composite cutting tap and the bottom of the wire is formed by at least two different cutting face faces.

Preferably, the angle between the cutting edge surface at the chamfered portion of the cutting wire edge of the split-direction composite cutting tap and the tangent of the concentric circle on the same side is greater than the tangent of the cutting edge surface and the concentric circle on the same side The angle of the. Technical solution 3

A split-diameter composite cutting tap includes a wire blade body and a wire handle, the wire blade body and the wire handle are integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, and each of the wire edge strips has a cutting front a blade surface, wherein at least a first wire cutting edge at a chamfered portion of each wire edge has a wire bottom diameter smaller than a wire bottom diameter of the other wire cutting edge,

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氺 The cutting wire edge at the chamfered portion of each wire edge strip is at least one stepped or spiral stepped arrangement with the other wire bottoms, and at least the first cutting wire edge is aligned with the other wire bottoms The lines on the cutting edge are not in a straight line or on a spiral.

Preferably, the line of the wire bottom of the cutting wire edge of the split-direction composite cutting tap on the cutting edge is distributed over at least two different straight lines or spirals. Technical Solution 4:

A split-diameter composite cutting tap includes a wire blade body and a wire handle, and the wire blade body and the wire handle are connected or integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, wherein: 1, each wire The diameter of the wire bottom of at least the first cutting edge at the chamfered portion of the blade strip is smaller than the diameter of the wire bottom of the other cutting wire edge, and the wire bottom of the wire cutting edge at the chamfered portion of each wire edge strip is at least equal to the other wire bottom a stepped arrangement of one stage or a spiral stepped arrangement, and at least the line connecting the bottom of the first cutting wire and the other wire on the cutting edge is not in a straight line or a spiral line; A part or all of the cutting face is machined into one, forming a '■!, wire edge face, the wire edge face and the cutting edge face or the connected chip groove wall are not on a curved or spiral surface. Technical solution 5:

A split-diameter composite cutting tap includes a wire blade body and a wire handle, and the wire blade body and the wire handle are connected or integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, wherein: 1, each wire The diameter of the wire bottom of at least the first cutting edge at the chamfered portion of the blade strip is smaller than the diameter of the wire bottom of the other cutting wire edge, and the wire bottom of the wire cutting edge at the chamfered portion of each wire edge strip is at least equal to the other wire bottom a stepped arrangement of a first step or a spiral stepped arrangement, and at least the line connecting the bottom of the first cutting wire and the other wire on the cutting edge is not in a straight line or a spiral line; 3. Each wire edge Cutting edge at the chamfered portion The angle between the face and the tangent of the concentric circle at the top of the wire is greater than the angle between the cutting edge of the back and the tangent of the concentric circle at the top of the wire. Technical solution 6:

A split-diameter composite cutting tap comprises a wire blade body and a wire handle, the wire blade body and the wire handle are connected or integrally formed, and the wire blade body is integrally provided with a plurality of wire edge strips, characterized in that: 2, each wire Part or all of the cutting edge of the blade is machined into a single piece to form a small wire face, and the wire face and the cutting edge or the connected chip wall are not on a curved or spiral surface; The angle between the cutting edge at the chamfered portion of the wire edge and the tangent to the concentric circle at the top of the wire is greater than the angle between the cutting edge of the rear portion and the tangent to the concentric circle at the top of the wire. Technical Solution 7:

A split-diameter composite cutting tap includes a wire blade body and a wire handle, and the wire blade body and the wire handle are connected or integrally formed, and a plurality of wire blade bodies are connected or integrally connected to the wire handle, and the front surface of each wire blade body There is a cutting edge surface, which is characterized in that: 1. The diameter of the wire bottom of at least the first cutting wire edge at the chamfered portion of each wire edge strip is smaller than the diameter of the wire bottom of the other cutting wire edge, and the cutting edge of each wire cutting edge The wire bottom of the cutting wire at the corner portion is at least one stepped or spiral stepped arrangement with the other wire bottom, and at least the wire of the first cutting wire and the other wire are connected on the cutting edge. Not in a straight line or spiral line; 2. Part or all of the cutting edge of each wire edge strip is machined into one, forming a small wire face, the wire face and the cutting edge or the flutes connected to it. The wall is not on a curved surface or a spiral surface; 3. The angle between the cutting edge at the chamfered portion of each wire edge and the tangent to the concentric circle at the top of the wire is greater than the concentric circle at the cutting edge and the top of the wire at the rear The angle of the tangent; the above three different techniques A combination of programs.

Preferably, at least the first wire bottom diameter of the cutting wire edge is smaller than the other wire cutting edge at the chamfered portion of the cutting wire edge of the split diameter guiding composite cutting wire

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氺 The cutting wire edge at the chamfered portion is at least one stepped arrangement or spiral stepped arrangement with the other wire bottoms, and a part or all of the cutting edge faces of each wire edge strip are processed into one piece. A small wire face is formed, and the wire edge of the wire and the cutting edge or the wall of the chip groove are not on a curved or spiral surface.

Preferably, at least the diameter of the first wire bottom of the cutting wire edge is smaller than the diameter of the wire bottom of the other cutting wire edge at the chamfered portion of the cutting wire edge of the split diameter guiding composite cutting tap, and the cutting wire edge at the chamfered portion The wire bottom and the other wire bottom are arranged at least one stepwise arrangement or spiral stepwise arrangement, and the angle between the cutting edge surface at the chamfered portion of each wire edge and the tangent of the concentric circle at the top of the wire is greater than The angle between the cutting edge of the part and the tangent of the concentric circle at the top of the wire.

Preferably, a part or all of the cutting edge surface of each of the wire edge strips of the split-diameter composite cutting tap is processed into one piece to form a 'j, a wire edge surface, a small wire blade face and a cutting edge surface there Or the connected chip flute walls are not on a curved or spiral surface; and the angle between the cutting edge at the chamfered portion of each wire edge and the tangent to the concentric circle at the top of the wire is greater than the cutting face and wire at the rear The angle between the tangent of the concentric circles at the top. Beneficial effect

Since the present invention employs a small wire face on the cutting face of each wire blade body to enhance the strength of the wire blade body; at least the first wire at the chamfered portion in the cutting direction of each wire blade body is employed Small bottom diameter

For other wire cuttings, the diameter of the wire bottom, and the bottom of the wire at the chamfered portion and the other wire bottom are at least one stepped arrangement or spiral stepped arrangement, which is equivalent to prolonging the chamfering and reducing the cutting. The amount of taps can be smoothly positioned on the workpiece, preventing the occurrence of chaotic yarns and improving the cutting efficiency; due to the tangent of the concentric circles at the chamfered portion and the top of the filament at the chamfered portion in the cutting direction of the wire blade body The angle between the cutting edge of the rear portion and the tangent of the concentric circle at the top of the wire increases the heat dissipation function and enhances the strength. DRAWINGS

The technical solutions and advantages of the present invention will be described in detail in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a first embodiment of the present invention, and Fig. 2 is a view taken along line A-A of Fig. 1 of the present invention.

Fig. 3 is a schematic view showing a second embodiment of the present invention, and Fig. 4 is a view taken along line A A of Fig. 3 of the present invention.

Fig. 5 is a schematic view showing a third embodiment of the present invention, and Fig. 6 is a view taken along line A-A of Fig. 5 of the present invention.

Figures 7 and 8 particularly illustrate schematic views of a helical wire blade tap to which several features of the present invention are applied. detailed description

The technical solution of the split-diameter composite cutting tap of the present invention and its preferred embodiment will be described in detail below with reference to the accompanying drawings.

Embodiment 1

As shown in FIG. 1 and FIG. 2, the split-diameter composite cutting tap includes a wire blade body 1 and a wire handle 2, and the wire blade body 1 and the wire handle 2 are integrally formed, and a plurality of wires are integrally formed on the wire blade body 1. The blade 3, at least the end wire edge of the taper portion 4 of the tap or the diameter 02 of the wire bottom 10 of the first wire edge is smaller than the diameter 01 of the other wire cutting blade bottom 9, in other words, the chamfered portion 4 The cutting wire edge 10 and the other wire bottoms 9 are arranged in a stepwise arrangement or a spiral step arrangement on the cutting edge surface 6, and the diameter 02 of the first wire bottom 10 is reduced to reduce the initial cutting amount. , equivalent to extending the chamfering of the cutting wire edge, because the taper portion of the tap is too long, it is not conducive to the processing of the wire hole, so the main cutting work is too large and therefore laborious, through the chamfered portion 4 at the first wire bottom 10 The reduction of the diameter of ₀ 2 extends the main cutting edge, which reduces the amount of cutting and improves the efficiency.

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« Embodiment 2

As shown in FIG. 3 and FIG. 4, the split-diameter composite cutting tap is similar to the first embodiment, and includes a wire blade body 1 and a wire handle 2, and the wire blade body 1 and the wire handle 2 are integrally formed, and the wire blade body 1 is formed. A plurality of wire edge strips 3 are integrally provided. According to this embodiment, a platform 8" is formed on the cutting edge surface 6 of the front end face of each wire edge strip 3 in terms of the rotational cutting direction from the wire top 7 to the wire bottom 9, forming a relative to said The cutting edge surface 6 retreats in a direction opposite to the direction of rotation by a certain distance of the wire edge surface 5, the wire edge surface 5 and the corresponding cutting edge surface 6 or the chip removal hole wall are not in a plane or a curved surface or a spiral surface, the filament The blade face 5 has a heat dissipation function and an enhanced strength.

Embodiment 3

As shown in Figs. 5 and 6, the split-diameter composite cutting tap is similar to the embodiment 1, and includes a wire blade body 1 and a wire shank 2 which are integrally formed with the wire shank 2. According to this embodiment, the angle a between the wire edge of the chamfered portion 4 and the tangent of the concentric circle at the cutting edge is larger than the angle b between the cutting edge face 6 of the rear portion and the tangent of the concentric circle at the cutting edge. The wire edge surface extends rearward from the chamfer along the axis to form an angle of inclination with the axis, that is, the wire edge surface at the chamfer is slightly inclined toward the wire top direction, and the rear wire edge surface gradually passes from the wire top to the wire edge surface. Tilt in direction.

Through the above structure, the angle between the chamfer of the tap and the top of the tap is larger than the angle between the chamfer of the existing tap and the top of the wire, which increases the resistance of the wire edge surface 9 at the chamfer and prevents the tap blade The occurrence of disintegration.

Other embodiments

In the embodiment not shown, the features of the above three embodiments may be arbitrarily combined. That is, the split-directed composite cutting tap can simultaneously have any two or a combination of three of the following features: 1. The diameter of the wire bottom of at least the first cutting edge at the chamfered portion of each wire edge strip Less than the diameter of the wire bottom of the other cutting edge, the wire bottom of the wire at each chamfered portion of the wire edge is at least one stepped or spiral stepped arrangement with the other wire bottom, and at least first Cutting edge The line connecting the silk bottom with the other silk bottom on the cutting edge is not in a straight line or spiral line;

2. Part or all of the cutting edge surface of each wire edge strip is machined into one piece to form a small wire blade surface, and the wire edge surface and the cutting edge surface or the connected chip flute wall are not on a curved surface or a spiral surface. 3. The angle between the cutting edge at the chamfered portion of each wire edge and the tangent to the concentric circle at the top of the wire is greater than the angle between the cutting edge of the rear portion and the tangent of the concentric circle at the top of the wire.

In particular, Figures 7 and 8 particularly illustrate schematic views of a helical wire blade tap to which the above three features of the present invention are applied.

In addition, the tap of the present invention may also have a plurality of stepped or spiral stepped arrangements of a plurality of different diameters of the wire edge of each of the wire edge strips 3, and the cutting edge is concentric with the top of the wire. A plurality of different angles of the circle, a part or all of the cutting edge faces of each wire edge strip are processed into one, and a plurality of different wire edge faces are formed in various combinations.

The preferred embodiments described above are illustrative, and of course there are other embodiments of the present technical solution.

The present application is not limited to the specific embodiments and the derivatives thereof as defined in the claims of the present invention.

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Claims

Rights request

1. A split-diameter composite cutting tap comprising a wire blade body and a wire handle, the wire blade body and the wire handle being integrally formed, the wire blade body being integrally provided with a plurality of wire edge strips, each of the wire edge strips having a front side The cutting edge surface is characterized by having any one of the following features and any combination thereof: (1) the angle between the cutting edge surface at the chamfered portion of each wire edge and the tangent of the concentric circle at the top of the wire is greater than that of the rear portion The angle between the cutting edge and the tangent of the concentric circle at the top of the wire; (2) the diameter of the wire bottom of at least the first cutting edge at the chamfered portion of each wire edge is smaller than the diameter of the wire bottom of the other cutting wire, The cutting wire edge at the chamfered portion of each wire edge strip is at least one stepped or spiral stepped arrangement with the other wire bottoms, and at least the first cutting wire edge is aligned with the other wire bottoms The line on the cutting edge is not on a straight line or spiral line; (3) part or all of the cutting edge of each wire edge is machined into one, forming a 'j, wire face, small wire face and The cutting edge or the connected chip flute wall is not in a plane or curved Face or spiral surface.

2. The split-steering composite cutting tap according to claim 1, wherein the wire taper of the tap is one of the following types: a taper wire tap, a straight wire tap, a spiral blade Taps or other polyhedral taps.

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