TWM452815U - Composite-type cutting knife rod material - Google Patents

Description

Compound cutting tool bar

This creation is a composite cutting tool bar, especially a composite cutting tool bar that reduces the probability of breakage at high speeds.

Cutting tools such as drills, milling cutters, and wire taps are commonly used in machining, and the conventional cutting tools are formed by machining a bar including a handle and a head. One end of the portion is welded to one end of the head. Since the end of the handle is flat and the end of the head is also flat, the contact area between the two is not large enough, and a conventional cutting tool cuts one on one side. When the groove or the hole is rotated at a high speed, when the generated torsion force is greater than the stress of the welding surface of the shank and the head, the shank and the head are separated, thereby causing the cutting tool to be broken. It is a big drawback.

In order to solve the above problem that the cutting tool is broken due to the contact area between the cutting tool head and the shank being too small, the present invention provides a composite cutting tool bar, which comprises: a shank having a cylindrical shape and the knives One end surface of the shank is concavely formed in the axial direction with a conical surface and an apex, the apex being located in the middle of the conical surface and being farthest from the end surface of the shank, thereby forming a conical groove body; a tapered surface and the apex and located in the conical groove; and a cutter head having a cylindrical shape, the system being connected to the shank by the solder, and the cross-sectional radius of the cutter head is smaller than the The radius of the shank of the shank, The cutter head has a connecting end and a cutting end away from the connecting end, the connecting end is axially convexly formed with a cone body corresponding to the conical groove body and located in the conical groove body, and the conical system The solder is connected to the shank.

According to this creation, the term "composite" as used in this creation means that the material of the shank is different from the material of the cutter head.

According to the present invention, the cross-sectional radius of the cutter head according to the present invention refers to a cross-sectional radius perpendicular to the axial direction of the cutter head.

According to the present invention, the cross-sectional radius of the shank described in the present application refers to the cross-sectional radius perpendicular to the axial direction of the shank.

According to this creation, the "correspondence" as used in this creation refers to the shape matching.

Preferably, the apex angle of the axial section of the conical groove is 90 degrees.

Preferably, the apex angle of the axial section of the cone is 90 degrees.

According to the present creation, the axial section referred to in the present invention refers to a section of a vertical and a conical bottom surface passing through the apex of the cone, which is triangular.

According to the present creation, the apex angle described in the present invention refers to the angle between the two sides of the apex of the cone in the axial section of the aforementioned triangle.

Preferably, the volume of the cone is slightly smaller than the volume of the conical tank.

Preferably, the hardness of the material of the shank is less than the hardness of the material of the shank.

Preferably, the material of the shank is stainless steel, and the material of the shank is tungsten steel.

Preferably, the axial length of the cutter head is smaller than the axial length of the shank.

The advantage of the present invention is that a tapered cavity is formed at one end of the shank of the composite cutting tool bar and a cone is formed at one end of the cutting head, and the contact area is greatly increased by the solder bonding, so that the composite After the cutting tool bar is processed to form a composite cutting tool, the tool holder and the cutting head can be separated at a high speed, thereby increasing the service life of the composite cutting tool and increasing the industrial utilization.

In addition, the design utilizes the apex angle of the axial section of the conical groove body and the apex angle of the axial section of the conical body to be 90 degrees, so that the shank and the cutter head of the creation have a more stable fitting effect.

Further, since the hardness of the material of the shank is smaller than the hardness of the material of the shank, when the blade is cut at one end to form a cone, the process is simple, and the industrial applicability can be improved.

Further, since the cutter head is the main working component, the material of the cutter head is made of expensive tungsten steel, and the material of the shank is cheaper stainless steel, thereby reducing the composite cutting of the present invention. The manufacturing cost of the cutter bar and its cutting tool, but still gives the cutter head a certain hardness to maintain its cutting efficiency, so it has good economic benefits.

Referring to FIGS. 1 to 3, the composite cutting tool bar 1 of the present invention includes a shank 10, a solder 20, and a cutter head 30.

The shank 10 has a cylindrical shape, and an end surface of the shank 10 is concavely formed in the axial direction with a conical surface 11 and a vertex 12, and the apex 12 is located between the conical surface 11 and the shank The end faces of the 10 are farthest apart, thereby forming a conical groove body 13, the angle of the axial section of the conical groove body 13 is 90 degrees, and the material of the shank 10 is stainless steel. The aforementioned welding The material 20 is attached to the conical surface 11 and the apex 12 and is located in the conical groove body 13. The cutter head 30 has a cylindrical shape and is connected to the shank 10, and the cross-section radius of the cutter head 30 is smaller than the cross-sectional radius of the shank 10, and the length of the cutter head 30 is smaller than the shank 10 The length of the cutter head 30 has a connecting end 31 and a cutting end 32 away from the connecting end 31. The connecting end 31 is convexly formed along the axial direction of the cutting head 30 to form a cone 311. The cone 311 is formed. Corresponding to the conical tank 13 and the volume of the cone 311 is slightly smaller than the volume of the conical tank 13, the apex angle of the axial section of the cone 311 is 90 degrees, and the cone 311 is located in the conical tank 13 The solder 20 is connected to the shank 10 by the solder 20 .

1‧‧‧Composite cutting tool bar

10‧‧‧Knife

20‧‧‧ solder

30‧‧‧ cutter head

11‧‧‧ Conical surface

12‧‧‧ vertex

13‧‧‧Conical trough

31‧‧‧Connected end

32‧‧‧ cutting end

311‧‧‧ cone

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective, perspective view of a preferred embodiment of a composite cutting tool bar of the present invention.

Figure 2 is an exploded perspective view of the composite cutting tool bar of the present invention.

3 is a side cross-sectional view of a preferred embodiment of the composite cutting tool bar of the present invention.

1‧‧‧Composite cutting tool bar

10‧‧‧Knife

20‧‧‧ solder

30‧‧‧ cutter head

11‧‧‧ Conical surface

12‧‧‧ vertex

31‧‧‧Connected end

32‧‧‧ cutting end

311‧‧‧ cone

Claims (7)

A composite cutting tool bar, comprising: a shank having a cylindrical shape, and an end surface of the shank is concavely formed in the axial direction with a conical surface and a vertex, the apex being located in the middle of the conical surface a distal end of the shank, thereby forming a conical groove; a solder attached to the conical surface and the apex and located in the conical groove; and a cutter head having a cylindrical shape Connected to the shank by the solder, and the cross-section radius of the cutter head is smaller than the cross-sectional radius of the shank, the cutter head has a connecting end and a cutting end away from the connecting end, the connecting end A cone is formed in the axial direction, and the cone system corresponds to the conical groove body and is located in the conical groove body, and the conical system is connected to the shank by the solder. The composite cutting tool bar according to claim 1, wherein the apex angle of the axial section of the conical groove is 90 degrees. The composite cutting tool bar of claim 1 or 2, wherein the apex angle of the axial section of the cone is 90 degrees. The composite cutting tool bar of claim 3, wherein the volume of the cone is slightly smaller than the volume of the conical groove. The composite cutting tool bar according to claim 4, wherein the hardness of the material of the shank is smaller than the hardness of the material of the cutting head. The composite cutting tool bar according to claim 5, wherein the material of the shank is stainless steel, wherein the material of the cutting head is tungsten steel. The composite cutting tool bar of claim 6, wherein the axial length of the bit is less than the axial length of the shank.