TW201500137A - Composite cutlery - Google Patents

Abstract

A composite cutlery according to the invention comprises a handle part made of stainless steel or carbon steel and a knife head part made of tungsten steel, wherein a clamping stem body and a knife bar body are respectively formed at the two ends of the handle part, the outer diameter of the knife bar body is smaller than that of the clamping stem body, a convex column is formed in the center of the end face of the handle part, the centers of the two end faces of the knife head part are penetrated to form a through hole, and one end face of the knife head part is jointed to the end face of the knife bar body, the inner circumferential surface of the through hole is jointed to the outer circumferential surface of the convex column of the knife bar body, as such, when the cutlery is used for tapping or milling, the knife bar body made of stainless steel or carbon steel is not prone to breakage, and the bonding strength of the joint between the handle part and the knife head part is increased.

Description

Compound cutter

The invention relates to a tool, in particular to a composite tool for tapping or milling.

Generally, the cutting tool will form different cutting head shapes according to different functions. For example, the tip of the cutting head is mostly formed by forming a drilling tool on the workpiece, and the cutter head is flat. A tool for threading or milling is formed in the hole formed in the workpiece. For example, as shown in FIG. 5, a wire tapping cutter which forms an internal thread in a hole in a workpiece includes a stainless steel or carbon steel gripper 51 and a tungsten steel cutter rod 52, and the cutter bar The rear end of the shank body 520 of the 52 is fixedly coupled to one end of the shank 51 by welding. The front end of the shank body 520 is formed with a cutter head 521, and a thread for tapping is formed on the outer peripheral surface of the cutter head 521, and A plurality of spiral chip flutes 522 are formed extending from the cutter head 521 to the outer peripheral surface of the cutter body 520.

When the existing internal thread tapping tool is used, the clamping handle 51 is first clamped and fixed on the machine table, and then the cutter head 521 of the knife bar 52 is aligned with the hole to be tapped on the workpiece, by means of the machine. The table rotates the gripping handle 51, so that the cutter head 521 of the cutter bar 52 taps the inner thread on the hole wall of the hole, and the debris of the excess workpiece is discharged or squeezed and complemented by the chip flute 522 during tapping. Screw teeth shape.

Since the internal thread tapping tool must apply a force to twist the gripping handle 51 during tapping, the existing gripping grip 51 is made of stainless steel or carbon steel which can withstand a large torque, and is convenient for the hole in the workpiece. A clear thread is tapped on the wall of the hole, and the shank 52 is made of a tungsten steel having a higher hardness, thereby providing good quality and life of the internal thread.

However, the existing internal thread tapping tool has the characteristics of torsion resistance and tungsten steel of stainless steel or carbon steel, but the shank body 520 of the shank 52 is matched with the hole diameter of the workpiece, and must have a certain length. The shank body made of tungsten steel with hard and brittle texture can not withstand the torque generated by the high-speed rotation of the tool during the process of the tooth, and is easy to break during the tapping process, which not only causes poor quality of tapping. And the loss of the tool, but also easy to increase the danger of work.

Since the above-mentioned existing wire tapping or milling tool is easy to break in the process of working on the workpiece, the problem of poor quality of the screw or milling and tool loss is caused, and the present invention is solved to solve this problem. The main purpose of this is to propose a compound tool that can make the tool body body not easy to break during the tapping of the workpiece or during the milling process, thereby improving the quality and life of the screw or milling while reducing the loss of the tool. .

The composite cutter of the present invention comprises: a shank portion made of stainless steel or carbon steel, the two ends of which respectively form a clamping handle body and a shank body, the outer diameter of the shank body is smaller than the clamping shank body, And forming a protrusion in the center of the end surface; and a tungsten steel head having a continuous through hole formed at the center of the both end faces, the blade head being joined to the end surface of the tool body by an end surface, and the The inner peripheral surface of the through hole is joined to the outer peripheral surface of the stud of the shank body.

Preferably, the axial length of the cutter head is less than one-half of the sum of the axial lengths of the cutter body and the cutter head, and the cutter body is formed with a plurality of cutter flutes on the outer peripheral surface, the cutter head A plurality of cutter flutes respectively communicating with the cutter flutes are formed on the outer peripheral surface.

According to the above configuration, the composite tool of the present invention has a boss protruding from the end surface of the shank portion of the shank portion, and the shank portion and the knives of the shank portion are inserted into the through hole of the blade head by the stud. The head portion is not only joined to each other by the end faces, but also the inner peripheral surface of the through hole and the outer peripheral surface of the stud are joined to each other, thereby further increasing the joint strength and stability of the joint.

Furthermore, the axial length of the cutter head is less than one-half of the total axial length of the cutter body and the cutter head, and the tungsten steel cutter head has a high hardness, and the cutter is made of stainless steel or carbon steel. The rod body can withstand high torque. Therefore, even if the tool part is subjected to relatively large torque during the working process of the workpiece, the tool body is not easily broken, so that a good and stable thread can be provided. Or milling quality and life.

10‧‧‧Tools

11‧‧‧Knife

110‧‧‧Clamping handle body

111‧‧‧Tool body

112‧‧‧Bump

113‧‧‧Cutter flute

12‧‧‧Knife head

120‧‧‧through holes

121‧‧‧Cutter flute

L ₁ ‧‧‧ axial length of the knife head

L ₂ ‧‧‧Sum of axial length of the shank body and the cutter head

51‧‧‧Clamping handle

52‧‧‧Cutter

520‧‧‧Tool body

521‧‧‧ cutter head

522‧‧‧chip flute

Fig. 1 is a perspective view showing the appearance of the present invention.

Figure 2 is a partial cross-sectional view of the present invention.

Figure 3 is a partially enlarged cross-sectional view showing the present invention.

Figure 4 is a partially enlarged sectional view of the present invention.

Fig. 5 is a perspective view showing the appearance of an existing cutter.

In order to understand in detail the technical features and practical effects of the present invention, Further, in accordance with the contents of the specification, the following further describes the composite tool of the present invention. Referring to FIG. 1 and FIG. 2, the tool 10 includes a shank portion. 11 and a head portion 12, wherein the shank portion 11 is integrally formed of stainless steel or carbon steel, and a cylindrical clamping handle body 110 and a shank body 111 are respectively formed at two ends, and the shank body 111 is formed by One end of the clamping handle body 110 is formed, and the outer diameter is smaller than the clamping handle body 110. A protruding post 112 is formed at the center of the end surface of the shank body 111. The protruding post 112 can be formed on the outer peripheral surface. The at least one abutting surface has a cylindrical shape or a polygonal column shape, and the shank body 111 is formed with a plurality of spiral blade flutes 113 on the outer peripheral surface.

The blade head 12 is made of a tungsten steel material, and a continuous through hole 120 is formed in the center of both end faces of the blade head 12, and a plurality of burrs and chips respectively connected to the shank body 111 are formed on the outer peripheral surface. a spiral cutter chip flute 121 of the groove 113. Further, the axial length of the cutter head 12 is L ₁ , and the axial length of the cutter body 111 and the cutter head 12 is L ₂ , the cutter head 12 the axial length L ₂ of the arbor body 111 is less than one-half of the head axial length L ₂ sum of 12 (i.e., _{L 1 <1 / 2L 2)} .

Referring to FIG. 3 and FIG. 4, the above-mentioned blade head 12 is sleeved on the protrusion 112 of the blade body 111 by the through hole 120, and is fixedly coupled by a technical means such as welding, wherein the end face of the blade head 12 is joined. On the end surface of the shank body 111, the inner circumferential surface of the through hole 120 of the shank portion 12 is joined to the outer peripheral surface of the stud 112 of the shank body 111, and the gas expanded in the through hole 120 during welding can be penetrated. The hole 120 is discharged, whereby the joint of the blade head 12 and the shank body 111 can be more closely engaged.

In the composite cutter of the present invention, since the axial length L _{1 of the} cutter head 12 is less than one-half of the axial length sum L ₂ of the cutter body 111 and the cutter head 12, and the cutter head 12 is tungsten steel The material has high hardness, and the shank portion 111 of the shank portion 11 is made of stainless steel or carbon steel, and has high torsion characteristics. Therefore, the knives 10 of the present invention are used even when the shank portion 11 is subjected to a higher hardness. The high torque, stainless steel or carbon steel shank body 111 is not easy to break, so it can provide good and stable threading or milling quality and life.

Furthermore, in the joint between the blade body 111 and the blade head 12 of the present invention, in addition to the welding of the end faces of the blade body 111, the protrusions 112 protruding from the end faces of the blade body 111 are inserted into the blade head 12. The through holes 120 are fixed to each other, and therefore, the bonding strength and the stability of the joint are more increased.

10‧‧‧Tools

11‧‧‧Knife

12‧‧‧Knife head

Claims (3)

A composite cutter comprising: a stainless steel or carbon steel shank portion, the two ends of which respectively form a clamping handle body and a shank body, the outer diameter of the shank body is smaller than the clamping handle body, and Forming a protrusion in the center of the end surface; and forming a tungsten-steel head having a continuous through hole formed at the center of the both end faces, the blade head being joined to the end surface of the blade body by an end surface, and the inside of the through hole The circumferential surface is joined to the outer peripheral surface of the stud of the shank body. The compound cutter of claim 1, wherein the axial length of the cutter head is less than one-half of the sum of the axial lengths of the cutter body and the cutter head. The composite cutter according to claim 1 or 2, wherein the cutter body is formed with a plurality of cutter flutes on an outer peripheral surface, and the cutter head is formed with a plurality of lanes on the outer peripheral surface A chip flute that communicates with the cutter flute.