TWI651159B - Magnetic passivation grinder - Google Patents

Abstract

A magnetic passivation grinder includes a base for a motor, a magnetic disk connected to the motor output shaft and provided with a plurality of magnetic units, and a magnetic field formed on the magnetic disk. The grinding disc holds the magnetic medium abrasive particles because the guided by the magnetic field is distributed on the grinding disc. Thereby, after the milling cutter or the drill bit protrudes into the grinding disc, the magnetic medium abrasive grains in the grinding disc rotate with the magnetic disc, and hit the milling cutter or the drill bit, thereby producing the effects of passivation, polishing, grinding and deburring.

Description

Magnetic passivation grinder

The invention relates to a passivation machine, in particular to a magnetic passivation grinding machine which uses a guiding magnetic medium abrasive grain and allows the magnetic medium abrasive grain to contact the milling cutter or the drill bit to generate passivation, grinding, polishing and deburring effect.

For milling or drilling operations, the durability and finesse of a milling cutter or drill bit play a pivotal role. When the durability and fineness of the milling cutter or drill bit is increased, it is quite economical to achieve high-speed cutting operations or to reduce the frequency of milling cutters or bit replacement.

The main job of improving the durability and fineness of a milling cutter or drill bit comes from improving the durability and fineness of the milling cutter or the cutting edge of the cutting edge. Thus, the milling cutter or the drill passivation process or the edge honing process It is a very important and necessary process. Why is the passivation of the milling cutter or the drill edge? The reason is that during the process of making the milling cutter or the drill bit, the grinding process is used to create the cutting edge, and the cutting edge is used to contact the workpiece for cutting or drilling. However, there are still different microscopic defects such as notches, burrs or wear marks after the milling or bit cutting is completed.

Modern high-speed machining and automated machine tools place higher demands on the performance and stability of milling cutters or drill bits. If there are too many gaps, the service life of the milling cutter or the drill cutting edge will be shortened rapidly during the cutting process, because the notch is easy to expand and the cutting edge is damaged; if the burrs or the wear scars are too much, the milling cutter or the cutting edge during the cutting process The unevenness of the mouth will make the machined surface of the workpiece uneven and unable to meet the processing requirements. In addition, coated or coated milling cutters or drill bits must be passivated by the cutting edge before coating or plating to ensure the firmness of the coating or coating on the milling cutter or drill bit.

At present, commercially available milling cutters or drill bits have a high cost due to passivation treatment, and most of them are high-priced milling cutters or drill bits that pass through the passivation process of the passivation machine, and the general milling cutter or drill bit does not passivate. The reason is that the passivation operation of the current passivation machine is that the chuck clamps a plurality of milling cutters or drill bits at a time, and extends into a receiving groove filled with a soft medium material (for example, wood chips), and the cutter head rotates to drive the milling cutter or the drill bit. Rotating the friction soft dielectric material, but it takes a long time to achieve the passivation or polishing effect by using the friction soft dielectric material, and the production efficiency is not good enough, and only the high-priced milling cutter or the drill bit can be performed.

In addition, the passivation machine used by the milling cutter or drill bit manufacturer is a passivation machine that performs batch milling or bit passivation in batches. It is not suitable for the single milling cutter or drill passivation required by the user after refurbishing the milling cutter or the drill bit. Therefore, there is still a need to design a passivation machine for a single milling cutter or drill bit.

For the polishing work, the design of the magnetic grinder has been improved on the market. The general magnetic grinding machine has a receiving groove for placing the stainless steel needle and the workpiece, and a magnetic disk is arranged at a distance from the receiving groove. The user controls the driving unit of the magnetic grinding machine to drive the magnetic disk to rotate relative to the receiving groove. The magnetic disk rotates relative to the receiving groove to generate an alternating magnetic field inside the receiving groove. Because there is an alternating magnetic field in the accommodating groove, the stainless steel needle will be driven by the magnetic field to generate a beating motion, and the stainless steel needle will collide with the workpiece in the accommodating groove to produce a grinding effect. The design of the magnetic grinding machine described above is suitable for precision parts with small angles and screw teeth which are generally difficult to be polished by conventional grinding techniques, and can effectively and quickly achieve the polishing effect.

However, the current magnetic grinder adopts a method of making the stainless steel needle beating to produce a grinding effect. Because the angle of the milling cutter or the drill bit is large, the current magnetic grinder is still not suitable for the passivation of the milling cutter or the cutting edge of the drill.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a magnetic passivation grinder capable of polishing, grinding and passivating a milling cutter or drill bit.

According to the present invention, a magnetic passivation grinder includes: a base; a motor disposed on the base, the motor having an output shaft; and a magnetic disk fixed to the output shaft The motor drives the rotation; a plurality of magnetic units are disposed on the magnetic disk, and a magnetic field is generated on the magnetic disk; a grinding disk is detachably placed on the magnetic disk, and the grinding disk is loaded with a plurality of magnetic waves Medium abrasive grain, the grinding disk has a bottom.

Thereby, the magnetic field generated by the respective magnetic units on the magnetic disk will pass through the grinding disc, and the magnetic medium abrasive grains in the grinding disc are distributed by the magnetic field to be distributed on the grinding disc. When the magnetic disk and the grinding disc rotate, the magnetic medium abrasive particles are driven to passivate, remove the burrs, grind and polish the milling cutter or the drill bit.

It should be noted that each of the magnetic units is arranged in an N-pole-S pole or an S-pole-N pole manner toward the grinding disc side. Thereby, the effect of guiding the magnetic medium abrasive grains can be enhanced.

In addition, each of the magnetic units on the magnetic disk is arranged along an arc-shaped rotation curve. Different magnetic field distributions are formed. Each of the magnetic units on the magnetic disk is arranged from the inside to the outside in an N-pole-S pole or an S-pole-N pole manner toward the grinding disk side. Alternatively, each of the magnetic units on the magnetic disk may be from the inside to the outside, and the N-pole-N pole-N pole or S pole-N pole-S pole-S pole mode is oriented toward the grinding disc side. arrangement.

It is also possible that the magnetic unit is a permanent magnet and is one of a cylindrical shape, a rectangular shape or a long rectangular shape.

In addition, the magnetic medium abrasive grains are composed of magnetic conductive particles plus hard abrasive grains and a liquid binder.

In addition, in an embodiment, a housing is further disposed on the base and covers the grinding disc. The housing has a top shell portion and at least one working hole is formed in the top shell portion, and the working hole is located above the grinding disc. After the user holds the milling cutter or the drill bit, the working hole extends into the grinding disc to perform the passivation operation, thereby reducing the risk of operation.

When the outer casing is disposed, the upper and lower plates may be additionally fixed to the outer casing, and the upper plate has at least one adjusting hole having the same aperture as the working hole, and the distance between the upper plate and the lower plate is equal to the The distance between the top shell portion and the bottom of the grinding disc. The user can insert the milling cutter or the drill bit to be passivated into the adjusting hole, and simulate the milling cutter or the drill bit into the grinding disc by the position of the upper and lower plates.

At least one adjustment block may be added between the upper plate and the lower plate. It is convenient for the user to pre-adjust the depth of the milling cutter or the drill into the grinding disc.

It is worth mentioning that the bottom of the disc can be made flat; further comprising a milling cutter holder, the milling cutter holder having a first through hole, the first through hole having a first axis, the first The axis is at a 90 degree angle to the bottom of the disk. It is convenient for the milling cutter to passivate, remove the burrs, grind and polish, and obtain good results.

In addition, the bottom of the disc may be planar; further comprising a drill bit, the bit holder having a second through hole, the second through hole having a second axis, the second axis and the The bottom of the disc is clipped at a 59 degree angle. It is convenient for the drill bit to passivate, remove burrs, grind and polish, and obtain good results.

In order to explain the technical features of the present invention in detail, the following preferred embodiments will be described with reference to the drawings, wherein:

As shown in FIG. 1 to FIG. 3, a magnetic passivation grinder 10 according to a preferred embodiment of the present invention mainly includes a base 11, a motor 12, a magnetic disk 13, a plurality of magnetic units 14 and Grinding the disc 15.

The base 11 is for carrying a load, and in this embodiment is a loading motor 12.

The motor 12 is disposed on the base 11. The motor 12 has an output shaft 121 that will rotate after the motor 12 is activated.

The magnetic disk 13 is fixed to the output shaft 121, and the magnetic disk 13 is rotated by the output shaft 121 of the motor 12.

A plurality of magnetic units 14 are disposed on the magnetic disk 13 to generate a magnetic field on the magnetic disk 13. The magnetic unit 14 referred to herein is an object or device that generates a magnetic field. In the present embodiment, each of the magnetic units 14 is a magnet, which is disposed on a side of the magnetic disk 13 with respect to the output shaft 121, and generates the magnetic field.

And, the grinding disc 15 is detachably placed on the magnetic disk 13 to rotate with the magnetic disk 13. The grinding disc 15 holds a plurality of magnetic medium abrasive grains 151. In the present embodiment, the abrasive disk 15 has a disk bottom 152 which is planar.

The magnetic medium abrasive grains 151 are positioned in the grinding disc 15 and distributed on the grinding disc 15 by the action of the magnetic field. In the present embodiment, the magnetic medium abrasive grains 151 are used as long as they can conduct magnetism and produce a polishing effect.

It is worth mentioning that, as shown in FIG. 3, each of the magnetic units 14 is arranged in an N-pole-S pole or an S-pole-N pole manner. Thereby, the effect of guiding the magnetic medium abrasive grains 151 can be enhanced.

In addition, as shown in FIG. 4, each of the magnetic units 14 on the magnetic disk 13 is arranged along an arc-shaped rotation curve (shown by a dotted line in the figure). In Fig. 4, each of the magnetic units 14 on the magnetic disk 13 is arranged in an N-pole-S pole or an S-pole-N pole from the inside to the outside toward the grinding disk 15 side.

As shown in FIG. 5, each of the magnetic units 14 on the magnetic disk 13 is from the inside to the outside to face the grinding disk side as an N-pole-N pole-N pole or an S pole-N pole-S. Polar-S pole arrangement.

It should also be noted that, as shown in Figures 6 and 7, in the present embodiment, the magnetic unit 14 is a permanent magnet, which is one of a cylindrical shape, a rectangular shape or a long rectangular shape. Figure 6 shows that the magnetic unit 14 is rectangular. Figure 7 shows the rectangular shape of the magnetic unit 14.

There are two sources of the magnetic medium abrasive grains 151 in this embodiment, one of which is selected from the group consisting of stainless steel beads, stainless steel powder, iron sand, iron powder, iron beads and a mixture thereof, and then a hard abrasive material is added. After high-temperature sintering treatment to obtain abrasive grains with high wear resistance characteristics, the following describes the manufacturing process: first, the pure iron powder and the hard abrasive material (such as tantalum carbide, alumina or diamond) are mixed by a binder to form a block. The body is heated at a high temperature of about 1000 ° C for a period of heating time, so that the pure iron powder is melted and combined with the hard abrasive material, and the binder is released, and then pulverized by a high pressure method to obtain abrasive grains having magnetic permeability. The abrasive particles have a pure iron component and are magnetically attracted to the magnet, and the abrasive grains contain a hard abrasive material to improve wear resistance.

In addition, the magnetic medium abrasive particles 151 may be a small particle magnetic conductive particle, such as steel sand, iron sand, tungsten steel sand or stainless steel sand, to achieve the effect of magnetic conduction. Hard abrasive particles having a smaller diameter than the aforementioned magnetically permeable particles, such as tantalum carbide, alumina, diamond particles, and zirconia, are used to produce passivation, burr removal, grinding, and polishing. In addition, a liquid binder is used to combine the magnetically permeable particles and the hard abrasive particles into magnetic medium abrasive particles 151.

As shown in Fig. 8, the process of achieving the effects of passivation, burr removal, grinding and polishing in the present embodiment will be described next.

First, a certain proportion of magnetically conductive particles (steel sand, iron sand, tungsten steel sand or stainless steel sand) and hard abrasive grains (tantalum carbide, alumina, diamond particles, zirconia) are combined in a liquid binder to form Magnetic medium abrasive particles 151.

The grinding disc 15 and the magnetic disc 13 rotate, and the magnetic medium abrasive grains 151 are guided by the magnetic field generated by the magnetic unit 14, and will be integrally distributed in the grinding disc 15 and have elasticity (because the magnetic medium abrasive grains 151 are guided by the magnetic field) The effect of a "magnetic fluid steel brush" that moves back to the original position after moving and softness (because the magnetic medium abrasive grains 151 are hindered to change the traveling direction). The term "fluid" as used herein means that the direction of travel is like a fluid because the magnetic medium abrasive particles 151 are obstructed; and the "steel brush" refers to a milling cutter or a drill bit.

At this time, when the milling cutter or the drill bit protrudes into the grinding disc 15, the work of passivation, burring, grinding, and polishing is started.

It should be noted that, as can be seen from the above description, the magnetic passivation grinder provided by the present embodiment utilizes the magnetic medium abrasive grains 151 to be guided by a magnetic field to form an integral magnetic magnetic steel brush. Because the magnetic medium abrasive grains 151 are small in size, the corners of the milling cutter or the drill bit can be contacted by the magnetic medium abrasive grains 151 to have the effects of passivation, grinding, polishing and deburring, and the magnetic disk 13 and the grinding disk 15 are matched. High-speed rotation makes it possible to obtain fast and efficient passivation, grinding, polishing and deburring effects better than conventional techniques.

In addition, referring to the first, second, and eighth embodiments, in the present embodiment, a casing 16 is further disposed on the base 11 and covers the grinding disk 15. The casing 16 has a top casing portion 161 and the top casing. The portion 161 defines at least one working hole 162 that is located above the grinding disc 15 . After the milling cutter or the drill bit is extended from the working hole 162 into the grinding disc 15 for passivation, grinding, polishing and deburring, the risk of operation is reduced.

When the outer casing 16 is disposed, an upper plate 17 and a lower plate 18 may be additionally provided to fix the outer casing 16. The upper plate 17 has at least one adjusting hole 171 having the same hole diameter as the working hole 162, and the upper plate 17 and the upper plate 17 The distance between the lower plates 18 is equal to the distance between the top case portion 161 and the disk bottom 152 of the grinding disk 15. The user can insert the milling cutter or the drill bit to be passivated into the adjustment hole 171 first, and simulate the situation that the milling cutter or the drill bit enters the grinding disc 15 by the positions of the upper and lower plates 17, 18.

At least one adjustment block 19 may be added between the upper plate 17 and the lower plate 18. It is convenient for the user to pre-simulate the depth of the milling cutter or the drill bit into the grinding disc 15.

In addition to the above, as shown in Figures 9, 10, and 11. When the disc bottom 152 of the grinding disc 15 is flat, the present embodiment can further add a milling cutter holder 21 and a drill holder 22.

The milling cutter holder 21 has a first through hole 211. The first through hole 211 has a first axial center 211a, and the first axial center 211a is at a 90-degree angle with the disk bottom 152. In this way, the clamping cutter is placed on the milling cutter seat 21, and since the end of the milling cutter is perpendicular to the axis of the milling cutter, the end of the milling cutter and the bottom 152 of the grinding disc 15 can be ensured to be parallel, resulting in good grinding efficiency. effect.

The bit holder 22 has a second through hole 221 having a second axis 221a, the second axis 221a being at a 59 degree angle with the disk bottom 152. The chuck bit is placed on the bit holder 22, and since the apex angle of the bit is 118 degrees, the end of the bit and the bottom 152 of the grinding disk 15 can be ensured to be parallel, resulting in a good grinding efficiency.

10‧‧‧Magnetic passivation grinder

11‧‧‧Base

12‧‧‧ motor

121‧‧‧ Output shaft

13‧‧‧ Magnetic disk

14‧‧‧Magnetic unit

15‧‧‧ grinding disc

151‧‧‧Magnetic medium abrasive grains

152‧‧‧ bottom

16‧‧‧Shell

161‧‧‧Top Shell

162‧‧‧Working holes

17‧‧‧Upper board

171‧‧‧Adjustment hole

18‧‧‧ Lower board

21‧‧‧ Milling knife holder

211‧‧‧ first through hole

211a‧‧‧first axis

22‧‧‧ bit holder

221‧‧‧second through hole

221a‧‧‧Second axis

Figure 1 is a perspective view of a first preferred embodiment of the present invention. Figure 2 is a schematic cross-sectional view showing a first preferred embodiment of the present invention. Figure 3 is a partial plan view of a first preferred embodiment of the present invention showing a magnetic disk. Figure 4 is a partial plan view of a first preferred embodiment of the present invention showing a magnetic disk. Figure 5 is a partial plan view of a first preferred embodiment of the present invention showing a magnetic disk. Figure 6 is a partial plan view of a first preferred embodiment of the present invention showing a magnetic disk. Figure 7 is a partial plan view of a first preferred embodiment of the present invention showing a magnetic disk. Figure 8 is a schematic view showing the use of the first preferred embodiment of the present invention. Figure 9 is a perspective view of a first preferred embodiment of the present invention showing the addition of a milling cutter holder and a bit holder. Figure 10 is a schematic cross-sectional view showing a first preferred embodiment of the present invention showing the addition of a milling cutter holder. Figure 11 is a schematic cross-sectional view showing a first preferred embodiment of the present invention showing the addition of a bit holder.

Claims (10)

A magnetic passivation grinding machine comprises: a base; a motor disposed on the base, the motor has an output shaft; a magnetic disk fixed to the output shaft, driven by the motor; a plurality of magnetic units, arranged In the magnetic disk, a magnetic field is generated on the magnetic disk; a grinding disk is detachably placed on the magnetic disk and rotates with the magnetic disk, the polishing disk is filled with a plurality of magnetic medium abrasive grains, the polishing disk has a a bottom plate; further comprising a casing disposed on the base and covering the grinding plate, the casing having a top casing portion and forming at least one working hole in the top casing portion, the working hole being located above the grinding plate; The plate and the lower plate are fixed to the outer casing, and the upper plate has at least one adjusting hole having the same hole diameter as the working hole, and the distance between the upper plate and the lower plate is equal to the distance between the top case portion and the bottom of the grinding plate the distance. A magnetic passivation grinder according to claim 1, wherein each of the magnetic units on the magnetic disk is arranged in an N-pole-S pole or an S-pole-N pole toward the grinding disc side. According to the magnetic passivation grinder of claim 1, wherein each of the magnetic units on the magnetic disk is arranged along an arc-shaped rotation curve. A magnetic passivation grinder according to claim 3, wherein: the magnetic units on the magnetic disk are arranged from the inside to the outside in an N-pole-S pole or an S-pole-N pole manner toward the grinding disc side. . According to the magnetic passivation grinder of claim 3, wherein: the magnetic unit on the magnetic disk is from the inside to the outside, and is oriented toward the grinding disc side as an N pole-S pole-N pole-N pole or S Pole-N pole-S pole-S pole arrangement. A magnetic passivation grinder according to claim 1, wherein the magnetic unit is a permanent magnet and is one of a cylindrical shape, a rectangular shape or a long rectangular shape. The magnetic passivation mill according to claim 1, wherein the magnetic medium abrasive particles are composed of magnetic conductive particles plus hard abrasive particles and a liquid binder. A magnetic passivation grinder according to the first aspect of the patent application, wherein: at least one adjusting block is disposed between the upper plate and the lower plate. According to the magnetic passivation grinding machine of claim 1, wherein: the bottom of the disc is a flat surface; and a milling cutter holder is further disposed on the top shell portion, the milling cutter holder has a first through hole communicating The working hole has a first axial center, and the first axial center is at an angle of 90 degrees to the bottom of the disk. The magnetic passivation grinder according to claim 1, wherein: the bottom of the disc is a flat surface; and a bit holder is further disposed on the top shell portion, the bit holder having a second through hole communicating with the operation a hole having a second axis, the second axis being at an angle of 59 degrees to the bottom of the disk.