JP3027813U - End mill dedicated to cutting printed circuit boards - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide an end mill exclusively for cutting a printed circuit board, which completely cuts fibers in the printed circuit board to form a smooth and precise cut surface. An end mill having a plurality of spiral cutting surfaces and an end cutting surface on an end surface, wherein a plurality of grooves are cut on the cutting surface of each spiral so as to be opposite to the spiral direction of the cutting surface. At the same time, a cut surface having an appropriate cutting angle is formed in the groove, and when the printed circuit board is cut by the cutting surface, the fibers inside the printed circuit board are cut to obtain a smooth and precise cutting surface.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a kind of end mill exclusively for cutting a printed circuit board, and more particularly to an end mill for cutting a printed circuit board containing fibers to make the cut surface smooth and more precise in cutting size.

[0002]

[Prior art]

 A well-known printed circuit board structure is that one fiber board is copper-plated on two sides to produce a circuit board. Is getting Depending on the location where the printed circuit board is installed, the printed circuit board must also be cut into the required shape. Traditionally, the shaping of printed circuit boards has been done by making cutters of a particular shape and cutting with a press. However, this type of high-speed punching press process causes deformation of the fragile printed circuit board due to cutting, affecting precision. Moreover, since the main component of the printed circuit board is the fiber board, fluff occurs when the fiber is not completely cut at the time of cutting, and it is necessary to proceed with extra correction to make the cut surface smooth. Moreover, a general cutter had its cutting edge slightly made of a carbonized material having high hardness, and the other parts were made of a steel material having strong toughness. Therefore, when it was worn for a certain period of time, it could not be used again after polishing and had to be replaced with a new cutter. Not only was this tedious to install, it was not economical. Therefore, after that, the method of cutting with an end mill as shown in Fig. 2 was adopted, but the cutting surface of the known end mill has a continuous spiral shape, and therefore the cutting surface is a printed circuit board. When cutting the fiberboard, it is subjected to a relatively large reaction force, the fibers contained therein cannot be completely cut, fluff occurs, and the printed circuit board after cutting must be corrected. I had to do it. In addition, the traditional end mill hemp flower threads not only had the problem of poor waste discharge, but the temperature was easily increased. The present invention was created in order to improve the drawbacks that exist when cutting a printed circuit board using such a traditional cutter and end mill.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a kind of dedicated printed circuit board slitting end mill having an improved cut surface of a blade, thereby making the printed circuit board after slitting precise, smooth, and fluff-free.

Next, the present invention provides a design for combining the cutting surface of the spiral shape with the cutting surface in the above-mentioned printed circuit board slitting end mill, so that when the cutting surface is worn, it can be ground and reused, which is the best economical method. The task is to achieve gender.

[0005]

[Means for Solving the Problems]

 The invention of claim 1 is an end mill having a plurality of spiral cutting surfaces, and an end cutting surface at an end surface, wherein a plurality of spiral cutting surfaces are provided so as to oppose the spiral direction of the cutting surfaces. As the groove is cut, a cut surface with an appropriate cut angle is formed in the groove, and when the printed circuit board is cut by the cutting surface, the fibers inside the printed circuit board are cut to make the surface smooth and precise. It is characterized by getting.

[0006]

[Embodiment of device]

 The printed circuit board cutting end mill of the present invention cuts a plurality of grooves on a plurality of spiral cutting surfaces of an end mill type milling cutter in the spiral direction of the cutting surfaces in opposition to each other. The cross section is formed so that when the cutting surface cuts the printed circuit board, the fibers inside are cut to obtain a smooth and precise cutting surface.

[0007]

【Example】

 Shown in FIG. 1 is a printed circuit board slitting end mill of the present invention, which in its preferred embodiment employs the basic form of an end mill, which has a plurality of spiral cutting surfaces 1 as well as ends. Has an end cutting surface 12. An anti-cutting surface 11 is formed on the back surface of the cutting surface 1. In addition, a plurality of grooves 2 are cut on the cutting surface of each spiral so as to be opposite to the spiral direction of the cutting surface, and a cutting surface 21 having an appropriate cutting angle is formed on the side of the groove 2. ing.

According to the above-described structure of the present invention, the milling cutter rotates and the end cutting surface 12 and the spiral cutting surface 1 are provided on the cutting surface 11 at the same time as cutting is performed on the printed circuit board. The cut surface 21 on the side surface of the groove 2 cuts the fibers contained in the printed circuit board, achieves the effect of smoothing the cut surface of the printed circuit board, and imparts relatively high airtightness to the printed circuit board, and It does not create the drawback of deformation of the printed circuit board formed by high speed punching presses with common cutters. Furthermore, the structural form of the present invention provides the effect of being able to be polished and reused after the cutting surface 11 is worn away, which is said to comply with the economic principle.

[0009]

[Effect of device]

 In summary, the advantages of the present invention are as follows. 1. By providing the groove, it has a good waste discharging capacity. 2. Since it has a good waste discharge effect, the cutting temperature naturally falls and the cutting performance is improved. 3. In particular, by designing the groove, it can be reused by polishing after cutting surface blunting, and production cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a side view of a conventional end mill.

[Explanation of symbols]

1 ... Cutting surface 11 ... Anti-cutting surface 12 ... End cutting surface 2 ... Groove 21 ... Cutting surface

Claims (1)

[Scope of utility model registration request] 1. An end mill having a plurality of spiral cutting surfaces and having an end cutting surface on an end surface, wherein a plurality of grooves are cut on the cutting surface of each spiral so as to be opposite to the spiral direction of the cutting surface. At the same time, a cut surface having an appropriate cutting angle is formed in the groove, and when the printed circuit board is cut by the cutting surface, the fibers inside the printed circuit board are cut to obtain a smooth and precise cutting surface. A special end mill for cutting printed circuit boards.