JP2009006438A - Supporting member for centerless grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supporting member for a centerless grinder to machine a grinding material made of a magnetic material of a small diameter and capable of continuously machining the grinding material in high efficiency while preventing floating of the grinding material from the supporting member. <P>SOLUTION: This supporting member 1 for the centerless grinder to machine the grinding material 2 made of the magnetic material in a columnar shape or in a cylindrical shape has a blade part 12 to support the grinding material 2 and a magnetic force generating part 11 to make magnetic force work on the grinding material 2. It is possible to improve the machining number of the centerless grinder 10 as a function to prevent floating of the grinding material 2 from the supporting member 1 is generated even in improving the machining number by increasing the number of revolution of a regulating wheel 3 as the magnetic force is made to work downward on the grinding material in the middle of grinding work. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support member for a centerless grinding machine for processing a material to be ground made of a magnetic material into a columnar shape or a cylindrical shape.

  At present, electronic parts used for applications such as transformers, coils, and antennas are obtained by winding a copper wire around a core material obtained by processing a magnetic material such as ferrite, iron, or permalloy into a cylindrical or cylindrical shape. Yes. Since these electronic components are used in small information terminals, there is a strong demand for miniaturization, and the size of the core material used for these electronic components is also becoming smaller every year.

  Conventionally, a centerless grinder has been used to obtain such a columnar or cylindrical core material.

  FIG. 4 shows an example of a conventional centerless grinding machine, (a) is a schematic sectional view of the centerless grinding machine, and (b) is an enlarged sectional view of part A for explaining the force acting on the material to be ground. It is.

  The centerless grinder 30 includes a grinding wheel 34, an adjustment wheel 33, a material to be ground 32, and a centerless grinder support member 31 that supports the material to be ground 32 (hereinafter also simply referred to as a support member). I have. The grinding wheel 34 and the adjustment wheel 33 are arranged with a gap 37, and the gap 37 is provided with a support member 31 having a slope whose tip is lowered to the adjustment wheel 33 side. 32 is supported from below.

  Further, the adjustment wheel 33 and the grinding wheel 34 have a cylindrical shape, and 33a and 34a represent central axes in the length direction (depth direction in FIG. 4) of the adjustment wheel 33 and the grinding wheel 34, respectively.

Then, when the grinding wheel 34 is rotated about the central axis 34 a and the adjustment wheel 33 is rotated about the central axis 33 a in the same rotational direction as the rotation of the grinding wheel 34, the support member 31 provided in the gap 37. The upper workpiece 32 has an inclination in which the tip of the support member 31 is lowered toward the adjustment wheel 33, so that it moves toward the adjustment wheel 33. It will be subjected to a force of F ₁₀ as about to be lifted in the direction, whereas the outer circumference is cut while rotating in contact with the grinding wheel 34 by rotation of the adjustment wheel 33 in. At this time, since the force F ₂₀ that combines the downward force and the gravity acts on the workpiece 32 from the grinding wheel 34, the F ₁₀ and F ₂₀ are balanced, and the grinding wheel rotates while rotating between the gaps 37. The outer periphery is ground by 34 so that high-precision cylindrical processing or cylindrical processing with high roundness can be performed.

  The center axis 33a and the center axis 34a may be arranged in parallel at the same height in the centerless grinding machine 30, but in this case, the material to be ground 32 continues to be ground at the same position. In order to discharge from the gap 37, it is necessary to push out in a direction parallel to the central axes 33a, 34a. In order to automatically discharge the material to be ground 32, the center shaft 33a of the adjustment wheel 33 is installed with the front side shown in FIG. 4 tilted downward, and the material to be ground 32 moves to the front side and is discharged from the gap 37. If the front side of the central shaft 33a is inclined upward, the workpiece 32 can move to the back side of FIG. As a result, a series of cylindrical grinding processes from supply to processing to discharge can be performed automatically and continuously.

However, in such a centerless grinding machine 30, in order to increase the processing speed, it is necessary to increase the rotational speed of the adjustment wheel 33 and to quickly discharge the workpiece 32 from the gap 37. iron, when a magnetic material such as permalloy is the abrasive 32 compact and lightweight as a core material for electronic components processed into a cylindrical shape or a cylindrical shape, the upward force F ₁₀ due to the adjustment wheel 33, When the force F ₂₀ that is the sum of the downward force and gravity applied by the grinding wheel 34 is increased, the material 32 is lifted upward from the support member 31 and automatic processing becomes impossible. For this reason, there has been a problem that the processing speed cannot be increased.

To solve this problem, as a method for continuously and centerlessly grinding a small material to be ground, for example, Patent Document 1 uses the first and second cassettes with a built-in upper presser for the material to be ground. The material to be ground loaded in the first cassette is inserted into the grinding machine together with the cassette and ground while holding the material to be ground with the upper press, and when the grinding is completed, the material to be ground is taken out together with the cassette, The material to be ground loaded in the cassette 2 is inserted into the grinding machine together with the cassette and ground in the same manner as described above, which is not used during grinding using either the first or second cassette. It is disclosed that the material to be ground is taken out and loaded into the cassette. According to this method, even a small material to be ground can be automatically processed while preventing the material from being lifted from the support member.
JP-A-1-310850

  However, in the grinding method disclosed in Patent Document 1, since the workpiece to be ground loaded in the cassette including the upper presser is inserted into the centerless grinding machine together with the cassette, the workpiece to be ground is removed from above the support member. It is possible to automatically and continuously process a small and lightweight material to be ground without failing to lift upward, but since the processing is temporarily stopped due to the time required to replace the cassette, the processing speed There is a problem that it is still difficult to increase the number of processing by improving the above. In addition, since the structure of the centerless grinding machine is complicated, there is a problem that the cost of the apparatus is increased.

  The present invention has been devised to solve the above-described problems, and is capable of continuously processing with high efficiency while preventing a small and lightweight material to be ground from floating from a support member. It aims at providing the support member for boards.

  A support member for a centerless grinder according to the present invention is a support member for a centerless grinder for processing a material to be ground made of a magnetic material into a columnar shape or a cylindrical shape, the blade portion supporting the material to be ground, It has the magnetic force generation part which makes magnetic force act on a material to be ground, It is characterized by the above-mentioned.

  Moreover, the support member for a centerless grinding machine according to the present invention is characterized in that, in the above configuration, the magnetic force generating part and the blade part are integrally formed of a material having magnetic force.

  Furthermore, the support member for a centerless grinding machine of the present invention is characterized in that, in the above configuration, the blade portion made of a nonmagnetic material is attached to the tip of the magnetic force generation portion made of a material having magnetic force. is there.

  Moreover, the support member for a centerless grinding machine of the present invention is characterized in that, in the above-described configuration, the blade portion is provided on the material to be ground side of the main body portion having the magnetic force generating portion.

  According to the support member for the centerless grinding machine of the present invention, the object to be ground has a blade part for supporting the material to be ground and a magnetic force generating part for applying a magnetic force to the material to be ground, and is supported during the grinding process. Since the magnetic force acts downward on the material, when the material to be ground made of magnetic material is processed into a columnar shape or a cylindrical shape, the material to be ground is removed from the support member even if the speed of the adjusting wheel is increased. Lifting can be prevented, and the processing speed of the centerless grinding machine can be improved to increase the number of processing.

  Further, according to the support member for the centerless grinding machine of the present invention, when the magnetic force generating part and the blade part are integrally formed of a material having magnetic force, the support member having a simple structure is supported during the grinding process. Since the magnetic force can be applied downward to the workpiece to be ground, the workpiece will not be lifted from the support member even if the speed of the adjustment wheel is increased, and the processing speed of the centerless grinding machine can be easily increased. The number of processing can be increased by improving.

  Furthermore, according to the support member for the centerless grinding machine of the present invention, when the blade portion made of a nonmagnetic material is attached to the tip of the magnetic force generation portion made of a material having magnetic force, the magnetic force generated in the magnetic force generation portion is Through the blade part made of non-magnetic material, it can act downward on the workpiece supported during grinding, so the processing speed of the centerless grinding machine is improved and the number of processing is increased. In addition, since the blade part supporting the material to be ground is a non-magnetic material, the grinding waste of the material to be ground, which is a magnetic material, is less likely to adhere to the blade part, and the attached grinding waste is to be ground. Since it is possible to prevent a situation in which the contact surface of the blade portion is worn by entering between the material and the blade portion, the amount of wear of the blade portion is reduced. Furthermore, if a ceramic material such as alumina, zirconia, or silicon nitride is used as the nonmagnetic material, the amount of wear of the blade portion can be further reduced.

  Further, according to the support member for the centerless grinding machine of the present invention, when the blade portion is provided on the material to be ground side of the main body portion having the magnetic force generating portion, the magnetic force generated by the magnetic force generating portion is transmitted via the main body portion and the blade portion. In addition, since it can act downward on the workpiece supported during grinding, the processing speed of the centerless grinding machine can be increased, the number of processing can be increased, and the magnetic force generator It is possible to make a structure that makes it easy to replace the magnet, or a structure that can control the magnitude of the magnetic force with an electric current value, such as an electromagnet. Therefore, it is possible to optimally control the magnitude of the downward magnetic force acting, so that the processing speed of the centerless grinding machine can be improved and the number of processing can be increased.

  Hereinafter, the example of embodiment of the support member for centerless grinding machines of this invention is demonstrated.

  FIG. 1 shows an example of an embodiment of a support member for a centerless grinding machine according to the present invention, (a) is a schematic sectional view of a centerless grinding machine, and (b) explains a force acting on a material to be ground. It is an expanded sectional view of the A section for, (c) is an expanded sectional view of the support member for centerless grinding machines.

  The centerless grinding machine 10 includes a grinding wheel 4, an adjustment wheel 3, a material 2 to be ground, and a support member 1 that supports the material 2 to be ground. 7 is arranged. The gap 7 is provided with a support member 1 having a slope whose tip is lowered toward the adjustment wheel 3, and the workpiece 2 is supported by the support member 1 from below.

  Further, the adjustment wheel 3 and the grinding wheel 4 have a cylindrical shape, and 3a and 4a represent central axes in the length direction (depth direction in FIG. 1) of the adjustment wheel 3 and the grinding wheel 4, respectively.

Then, the grinding wheel 4 is rotated in the direction of the arrow in the figure around the central axis 4a, and the center axis 3a is adjusted in the same rotational direction (direction of the arrow in the figure) as the rotation of the grinding wheel 4 When the vehicle 3 is rotated, the material 2 to be ground on the support member 1 provided in the gap 7 is inclined toward the adjustment wheel 3 because the tip of the support member 1 is inclined toward the adjustment wheel 3. And Then, the ground material 2 is subjected to Figure 1 (b) to the upward force F ₁ as shown as about to be lifted in the rotating direction of the regulating wheel 3 and into contact with the regulating wheel 3, while the adjustment wheel 3 The outer periphery is shaved while rotating in contact with the grinding wheel 4 by rotation. At this time, as shown in FIG. 1 (b), since the grinding target material 2 force F ₂ from the grinding wheel 4 by combining the downward force of gravity acts, balanced and the F ₁ and F ₂ The outer periphery of the workpiece 2 is ground by the grinding wheel 4 while rotating between the gaps 7 so that high-precision cylindrical processing or cylindrical processing with high roundness can be performed.

  The center axis 3a and the center axis 4a may be arranged in parallel at the same height in the centerless grinding machine 10, but in this case, since the material 2 to be ground continues to be ground at the same position, the material 2 to be ground is separated from the gap. In order to discharge from 7, it is necessary to push out in a direction parallel to the central axes 3a, 4a. In order to automatically discharge this, if the central shaft 3a of the adjustment wheel 3 is installed with the front side shown in FIG. 1 tilted downward, the workpiece 2 can move to the front side and be discharged from the gap 7. When the front side of the central shaft 3a is tilted upward, the workpiece 2 can be moved to the back side in FIG. Thereby, it is possible to automatically and continuously perform a series of cylindrical grinding processes from supplying to processing to discharging.

However, in order to increase the processing speed with such a centerless grinding machine 10, it is necessary to increase the number of revolutions of the adjustment wheel 3 to quickly discharge the workpiece 2 from the gap 7. At this time, in the case of a small and lightweight material 2 to be ground, such as a core material for an electronic component obtained by processing a magnetic material such as ferrite, iron, or permalloy into a columnar shape or a cylindrical shape, the upward adjustment by the adjusting wheel 3 The force F ₁ becomes larger than the force F _{2 obtained} by combining the downward force applied by the grinding wheel 4 and the gravity, and the material 2 to be ground is lifted upward from the support member 1. Since a series of cylindrical grinding processes up to discharge cannot be performed automatically and continuously, there arises a problem that the processing speed cannot be increased.

  Therefore, the present inventor has conducted various studies so that the workpiece 2 does not float upward from the support member 1 even if the rotational speed of the adjusting wheel 3 is increased in order to increase the processing speed. As shown in FIG. 1, even if the material is a magnetic material such as a core material for an electronic component obtained by processing iron, permalloy, or the like into a columnar shape or a cylindrical shape, 1 has a blade portion 12 that supports the workpiece 2 and a magnetic force generator 11 that applies a magnetic force to the workpiece 2, so that even if the speed of the adjustment wheel 3 is increased to increase the processing speed, the supply is possible. It was ascertained that a series of cylindrical grinding processes from processing to discharging can be performed automatically and continuously.

  Therefore, if the support member 1 of the present invention having the blade portion 12 for supporting the workpiece 2 and the magnetic force generating portion 11 for applying a magnetic force to the workpiece 2 is used, the support member 1 supports the workpiece 2. And a magnetic force generating part 11 for applying a magnetic force to the material 2 to be ground, and the rotational speed of the adjusting wheel 3 is increased by a magnetic force acting downward on the material 2 to be ground during grinding. As a result, the upward force acting on the material to be ground 2 can be further increased. Therefore, when the material 2 to be ground made of a magnetic material is processed into a columnar shape or a cylindrical shape, the rotational speed of the adjusting wheel 3 is increased. Even if the speed is increased, the material to be ground 2 can be prevented from floating from the support member 1, and the processing speed of the centerless grinding machine 10 can be improved to increase the number of processing.

  In particular, as shown in FIG. 1C, the support member 1 of the present invention preferably has a magnetic force generating part 11 and a blade part 12 of the support member 1 integrally formed of a material having magnetic force. By doing so, the structure of the support member 1 can be simplified, and the costs of the support member 1 and the centerless grinding machine 10 can be kept low.

  At this time, as a material having magnetic force, a permanent magnet such as a ferrite magnet, a neodymium magnet, a samarium cobalt magnet, or an alnico magnet may be used, and iron, cobalt, nickel, an alloy thereof, or a cemented carbide alloy may be used. You may use the material which gave the magnetic force to the ferromagnetic metal material using the magnetization power supply device. In consideration of the wear resistance of the support member 1, a cemented carbide can be preferably used.

  FIG. 2 is an enlarged sectional view showing another example of the embodiment of the support member for the centerless grinding machine of the present invention.

  As shown in FIG. 2, the supporting member 1 has a blade portion 12 made of a nonmagnetic material attached to the tip of a magnetic force generating portion 11 made of a material having magnetic force. When the support member 1 is provided with the magnetic force generating part 11, when the centerless grinding machine 10 is driven to cut the material 2 to be ground, the grinding scrap adheres to the blade part 12 and the magnetic force tends to be weakened. Thus, the adhesion of the grinding waste to the blade portion 12 is reduced, and it is prevented that the attached grinding waste enters between the workpiece 2 and the blade portion 12 and wears the contact surface of the blade portion 12. Therefore, the durability of the support member 1 is improved.

  The nonmagnetic material used for the blade portion 12 may be aluminum, copper, nonmagnetic stainless steel, resin, or the like, but a ceramic material is particularly preferable because of its excellent wear resistance. As the ceramic material, alumina, zirconia, silicon carbide, silicon nitride, or the like may be used. For example, in order to process a small-diameter workpiece 2 having a diameter of 1 mm or less, since the width of the blade portion 12 needs to be as thin as 1 mm or less, zirconia ceramics having excellent wear resistance and toughness are used. Is preferred.

  FIG. 3 is an enlarged sectional view showing another example of the embodiment of the support member for the centerless grinding machine of the present invention.

  As shown in FIG. 3, the support member 1 for the centerless grinding machine of the present invention preferably has a blade portion 12 on the material to be ground 2 side of a main body portion 13 having a magnetic force generating portion 11. By doing so, as the magnetic force generating means in the magnetic force generating unit 11, for example, it is possible to exchange with a magnet having a different magnetic force, and the magnetic force can be adjusted, or the current value can be changed by using an electromagnet. Thus, the magnetic force can be adjusted. That is, an optimum magnetic force can be applied to the material, size or weight of the material 2 to be ground, and the processing speed of the centerless grinding machine 10 can be further improved to increase the number of processing.

  Examples of the support member for the centerless grinding machine of the present invention are shown below.

  First, sample no. First, after the magnetic force generating part 11 and the blade part 12 are integrally formed of cemented carbide, a magnetic force is generated in the cemented carbide using a magnetized power supply device, and the magnetic force generating part 11 and the blade part 12 are The support member 1 of the example of the present invention formed integrally was obtained.

  Next, sample No. 2, after the magnetic force generating portion 11 is made of hardened steel, a magnetic force is generated by a magnetized power supply device, and a blade portion 12 made of zirconia ceramics is bonded to the tip of the magnetic force generating portion 11, as shown in FIG. The support member 1 of the Example of this invention as shown was obtained.

  Next, sample No. 3, the magnetic force generating part 11 is made of an electromagnet, and the blade part 12 made of zirconia ceramics is bonded to the ground material 2 side of the main body part 13 made of hardened steel whose other part has no magnetic force. As shown in FIG. 3, the support member 1 of the example of the present invention was obtained.

  Furthermore, sample no. No. 4, a support member of a comparative example integrally formed of cemented carbide and having no magnetic force was produced.

  The blade portion 12 had a thickness of 0.8 mm.

  Next, sample No. which is an example of these inventions. 1 to 3 and sample No. 1 as a comparative example. The maximum number of machining per minute and the amount of wear of the blade portion 12 were compared when the core material for electronic parts made of a Ni—Zn ferrite material was subjected to continuous automatic grinding using the support member 4. The amount of wear of the blade part 12 is measured in advance after measuring the height at the center of the inclined surface of the blade part 12 before use and grinding 1 million workpieces 2. The difference in height of the same portion was measured by a dial gauge as the amount of wear.

  Here, the dimensions before processing of the core material are 1.15 mm in diameter and 7 mm in length, and the dimension after processing is such that the adjustment wheel 3 and the grinding wheel 4 of the centerless grinding machine 10 have a diameter of 1.0 mm. The gap 37 was adjusted. As the centerless grinder 10, an SKS-N250 type centerless grinder manufactured by Shinko Seiki Co., Ltd. was used. Further, as the adjustment wheel 3, a resinoid grindstone manufactured by Allied Material Co., Ltd. is used, and the standard is A220R4R. I used one. The grinding wheel 4 was ground at 2500 rpm, and the adjusting wheel 3 was ground at the maximum rotational speed (unit: rpm) shown in Table 1.

  In addition, as a criterion for comprehensive judgment, the maximum number of machining per minute is 60 or more and the blade wear amount is 1 μm or less ◎ The maximum number of machining per minute is 60 or more, but the blade wear The case where the amount exceeds 1 μm is ○, and the case where the maximum number of machining per minute is less than 60, and the case where the amount of wear of the blade exceeds 1 μm is ×.

The results are shown in Table 1.

  As a result, Sample No. When the support member 31 for the centerless grinding machine having no magnetic force of 4 is used, when the speed of the adjusting wheel 33 is 25 rpm, the maximum number of machining per minute is 50 (50 pieces / minute), When the rotation speed of the adjusting wheel 33 was made faster than 25 rpm, the material to be ground 32 was lifted from the support member 31 and continuous automatic machining could not be performed.

  On the other hand, the sample No. of the example of the present invention. With the support members 1 and 2, the workpiece 2 can be continuously and automatically processed without being lifted from the support member 1 even when the rotation speed of the adjustment wheel 3 is increased to 40 rpm. The number was 80 (80 / min).

  In addition, sample No. In the support member 1 of 3, the current value of the magnetic force generating portion 11 made of an electromagnet is adjusted to optimally control the magnetic force acting on the material 2 to be ground, so that even if the speed of the adjusting wheel 3 is increased to 50 rpm, Continuous automatic machining was possible without the abrasive 2 being lifted from the support member 1, and the maximum number of machining per minute at that time was 100 (100 / min).

  In addition, when the amount of wear of the blade part 12 after grinding 1 million workpieces was measured for the samples of each of the examples and comparative examples, the blade part formed integrally with the cemented carbide was super-hard. Sample No. which is an example made of a hard alloy. 1 and Comparative Example Sample No. 4 was about 1.5 .mu.m, whereas the blade portion 12 was an example made of zirconia ceramics. 2 and Sample No. In the support member 1 of No. 3, the wear amount of the blade portion 12 was as small as about 0.5 μm.

  From the above results, sample No. If the support members 1 for centerless grinding machines 1 to 3 are used, a magnetic force acts downward on the workpiece 2 supported during grinding, so even if the rotational speed of the adjusting wheel 3 is increased. Since it is possible to prevent the material to be ground 2 from being lifted from the support member 1 by the upward force applied to the material 2 to be ground by the adjusting wheel 3, it becomes possible to make the rotational speed of the adjusting wheel 3 faster. It was confirmed that the number of processing of the centerless grinding machine 10 can be improved.

  In addition, sample No. which is an example of the present invention. The support member 1 having a magnetic force in which a blade portion and a magnetic force generation portion are integrally formed of a cemented carbide as a material, such as 1, is supported by a simple structure during grinding. It has been confirmed that since the magnetic force can be applied downward to the abrasive 2, the processing number of the centerless grinding machine 10 can be improved at a lower cost.

  In addition, sample No. which is an example of the present invention. 2 is generated in the magnetic force generation part 11 by using the support member 1 in which the blade part 12 made of zirconia ceramics which is a nonmagnetic material is attached to the tip of the magnetic force generation part 11 made of a material having magnetic force, such as 2. Since the magnetic force can be applied downward to the workpiece 2 supported during grinding by way of the blade portion 12 made of zirconia ceramics, which is a nonmagnetic material, the machining of the centerless grinding machine 10 It is possible to increase the number and because the blade portion 12 supporting the material 2 to be ground is a non-magnetic material, grinding scraps of the material 2 to be ground, which is a magnetic material, may adhere to the blade portion 12. At the same time, since zirconia ceramics have high wear resistance, the wear amount of the blade portion 12 is reduced, and the centerless grinding machine 10 with low running cost is achieved. It becomes possible has been confirmed.

  In addition, sample No. which is an example of the present invention. 3, the support member 1 having the blade portion 12 on the material 2 side of the main body portion 13 having the magnetic force generation portion 11 makes the magnetic force generated in the magnetic force generation portion 11 be changed to the main body portion 13 and the blade portion. 12, the workpiece 2 supported during grinding can be made to act downward, so that the number of processing of the centerless grinding machine 10 can be improved and the magnetic force generator Since 11 is an electromagnet, the magnetic force can be controlled by the current value, so that the downward magnetic force acting on the material, size, and weight of the workpiece 2 being ground can be optimally controlled. Therefore, it has been confirmed that the number of processing of the centerless grinding machine 10 can be further improved.

An example of embodiment of the support member for centerless grinding machines of this invention is shown, (a) is a schematic sectional drawing of a centerless grinding machine, (b) is A part for demonstrating the force which acts on a to-be-ground material (C) is an expanded sectional view of a centerless grinder support member. It is an expanded sectional view showing other examples of an embodiment of a support member for centerless grinding machines of the present invention. It is an expanded sectional view showing other examples of an embodiment of a support member for centerless grinding machines of the present invention. An example of a conventional centerless grinder is shown, (a) is a schematic cross-sectional view of the centerless grinder, and (b) is an enlarged cross-sectional view of part A for explaining the force acting on the material to be ground.

Explanation of symbols

1: Support member for centerless grinding machine (support member)
2: Material to be ground 3: Adjustment wheel 4: Grinding wheel F ₁ , F ₁₀ : Force acting upward F ₂ , F ₂₀ : Force acting downward
10: Centerless grinding machine
11: Magnetic force generator
12: Blade part
13: Body

Claims (4)

A support member for a centerless grinding machine for processing a workpiece made of a magnetic material into a columnar shape or a cylindrical shape, and a blade portion for supporting the workpiece and a magnetic force generator for applying a magnetic force to the workpiece. And a support member for a centerless grinding machine. 2. The support member for a centerless grinding machine according to claim 1, wherein the magnetic force generating portion and the blade portion are integrally formed of a material having magnetic force. The support member for a centerless grinding machine according to claim 1, wherein the blade portion made of a non-magnetic material is attached to the tip of the magnetic force generation portion made of a material having magnetic force. The support member for a centerless grinding machine according to claim 1, wherein the blade portion is provided on the material to be ground side of the main body portion having the magnetic force generation portion.

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