TWM501308U - Disposable keyway milling cutter - Google Patents

Description

Discarding keyway milling cutter

This creation is about a milling cutter for milling keyways, especially a discarded keyway cutter that can be used to improve tool rigidity, speed and cutting capability.

The commonly used keyway milling cutter 30, please refer to Figure 6, the material is mainly made of high-speed tool steel (HSS) round bar, milling spiral groove and blade forming, and grinding and heat treatment procedures are completed. The milling cutter for the keyway, the high speed tool steel (HSS) has a working temperature of up to 600 °C due to the material relationship, and the cutting speed V is about 30 m/min for cutting low carbon steel, so the cutting speed is slow and easy to passivate. The cutting efficiency is not good. However, if the keyway milling cutter made of tungsten steel is used, the cutting speed can be increased to 120m/min and the heat-resistant temperature is also increased to 1000°C, which can improve the machining efficiency and extend the service life of the tool. However, the hardness of the tungsten steel material is relatively high, the processing difficulty is relatively improved, and the price of the tungsten steel tool is at least 4 times that of the high speed tool steel. In addition, the blade of the keyway milling cutter must be ground by the grinder after passivation, so the user must Add at least 2 milling cutters of the same size to facilitate replacement when the milling cutter is passivated.

The material of the keyway milling cutter is mainly made of round bar of high speed tool steel (HSS), which has the advantages of slow cutting speed and easy passivation, and poor cutting efficiency, although there are tungsten steel materials. The keyway milling cutter has higher hardness and relatively more processing difficulty, and the price of the tungsten steel cutter is at least 4 times that of the high speed tool steel. The blade of the keyway milling cutter must be ground by the grinder after passivation, so the user At least two milling cutters of the same size must be purchased in order to facilitate the use of the milling cutter when it is passivated.

The artificial keyway milling cutter comprises a cutter bar, and a cutter seat is arranged at the end of the cutter bar, and the cutter seat is locked with a discarding blade, and the cutter seat is provided with a tool holder for distinguishing a positioning area and a receiving portion a locating area having a larger width than the accommodating area, the locating area is provided with a screw hole, the discarding blade is a flat plate, and comprises a positioning body, and the center of the positioning body is provided with a countersunk hole The top and bottom ends of the positioning body are provided with a blade edge, and the blade edge surface is provided with a cutting edge.

By designing the positioning body, the present invention can quickly locate the disposable blade, facilitate the assembly or quick replacement of the disposable blade, and lock the discarded blade with a bolt, and the disposable blade is designed as a flat body. Save material, reduce manufacturing costs, and use more advanced materials to improve cutting conditions and capabilities.

10‧‧‧Discarded keyway cutter

11‧‧‧Cutter

12‧‧‧ knife holder

121‧‧‧Location area

122‧‧‧Receiving area

13‧‧‧ screw holes

20‧‧‧ Discarding blades

21‧‧‧ Positioning ontology

22‧‧‧ countersunk hole

23‧‧‧Knife

231‧‧‧ cutting edge

30‧‧‧Keyway milling cutter

C‧‧‧ center line

e, f‧‧‧ spacing

A‧‧‧ screw hole center

B‧‧‧ countersunk hole center

Figure 1 is a perspective view of the creation

Figure 2 is a top view of the creation

Figure 3 is a side view of the creation

Figure 4 is a schematic view of the position of the screw hole and the countersunk blade countersink hole of the original tool holder.

Figure 5 is a diagram showing the variation of the size of the blade of the artificially discarded blade.

Figure 6 is a plan view of a conventional keyway milling cutter

Referring to Figures 1 to 3, the present invention is a keyway milling cutter 10 comprising a tool holder 11 having a tool holder 12 at the end thereof. The tool holder 12 is locked with a discarding blade 20; The locator 12 is divided into a locating area 121 and a accommodating area 122, and the locating area 121 has a larger width than the accommodating area 122. The locating area 121 is provided with a screw hole 13; A flat plate member includes a positioning body 21, and a center of the positioning body 21 is provided with a countersunk hole 22. The upper and lower ends of the positioning body 21 are provided with a blade edge 23, and the blade edge 23 is provided with a cutting edge 231.

Referring to FIG. 4, the screw hole 13 of the tool holder 12 has a position of the center a of the screw hole slightly offset from the center line C by a slight distance e, and the position of the center a of the screw hole is slightly higher than the abandonment. The center of the counterbore hole b of the blade 20 is a small pitch f. According to the embodiment, the distance between e and f is between 0.05 and 0.1 mm, so that a slight offset distance can be discarded. The blade 20 will be offset upwards and toward the left side when locked, and the left side surface and the top surface of the positioning body 21 will be closely pressed with the left side and the top surface of the positioning area 121 of the blade holder 12 to reach the blade. Positioning and locking functions.

Referring to FIGS. 1 and 2, the width of the positioning body 21 of the disposable blade 20 is greater than the diameter of the blade edge 23. When the disposable blade 20 rotates at a high speed, the positioning body 21 has an elongated lever. The blade lever 23 generates a torque, so that the milling torque generated by the blade lever 23 is increased, and the milling speed and the feed rate can be increased, thereby improving the milling efficiency.

Please refer to the figures 1~3. The material of the disposable disc 20 is made of tungsten steel and pressed and sintered by powder metallurgy. The material of the cutter is raised, rigid and heat resistant. The temperature and hardness are relatively increased, in order to reduce the processing time and reduce the processing cost. The disposable blade 20 is a flat body shape, so the volume material is smaller than the cylindrical traditional keyway milling cutter, the volume cost is naturally reduced, and the matching can be repeated The use of the shank 11 reduces the manufacturing cost of the shank 11 while improving the cutting efficiency of the disposable keyway cutter 10.

Referring to Fig. 5, in the embodiment of the present invention, the size of the blade 23 is changed. The size of the blade 23 is changed. According to the size of the milling keyway, the appropriate size of the disposable blade 20 is used for processing.

In summary, the design of the positioning body can quickly locate the disposable blade, facilitate the assembly or quick replacement of the disposable blade, and use bolts to lock and position the disposable blade. The disposable blade is designed as a flat body to save material, reduce manufacturing costs, and use higher-grade materials to improve cutting conditions and capabilities. It is highly progressive and practical, and is in line with the application requirements of the new patent law. , the application of the law.

However, the above-mentioned statements are only a preferred embodiment of the present invention, and all changes in the scope of the patents are subject to the scope of the patent.

10‧‧‧Discarded keyway cutter

11‧‧‧Cutter

12‧‧‧ knife holder

121‧‧‧Location area

122‧‧‧Receiving area

13‧‧‧ screw holes

20‧‧‧ Discarding blades

21‧‧‧ Positioning ontology

22‧‧‧ countersunk hole

23‧‧‧Knife

231‧‧‧ cutting edge

Claims (1)

The utility model relates to a discarding keyway milling cutter, which comprises a cutter bar, a cutter seat is arranged at the end of the cutter bar, and the cutter seat is locked with a discarding blade, wherein: the tool holder divides a positioning area and a receiving area, and the The positioning area has a larger width than the accommodating area, and the positioning area is provided with a screw hole; the discarding blade comprises a positioning body, the center of the positioning body is provided with a countersunk hole, and the upper and lower ends of the positioning body are provided with a blade edge The blade edge surface is provided with a cutting edge.