KR102095149B1 - Surface grinding device for cylindrical magnet - Google Patents

Abstract

The present invention relates to a cylindrical magnet grinding device and, more specifically, to a grinding device which can automatically grind a cylindrical magnet to provide high dimensional stability so that a concentric circle is formed from the central hole at the center to the outer surface. The cylindrical magnet grinding device comprises a magazine (133), a block (126), an in-guide (123), an actuator (129), a first pin (136), a second pin (141), and a grinding wheel (104).

Description

Cylindrical magnet grinding device {Surface grinding device for cylindrical magnet}

The present invention relates to a cylindrical magnet polishing apparatus, and more particularly, to a polishing apparatus capable of automatically polishing a cylindrical magnet to have high dimensional stability to form a concentric circle from the center hole to the outer surface.

The cylindrical magnet 10 is a center hole 11 formed on an axial line as shown in FIG. 1 and is used as a component of various motors.

The cylindrical magnet is formed into a cylindrical shape in which a center hole is formed in a mold by ferrite powder, and then through an electric sintering furnace to form a shape as shown in FIG. 1.

During the high-temperature sintering and cooling process, the magnet 10 must undergo secondary abrasive processing because it cannot be assembled and used immediately by mixing with other parts that require precision because shrinkage occurs in an uneven direction with an amount of variation that exceeds the tolerance range of design dimensions. Must go through.

In general, a cylindrical ferrite magnet causes a large change in the outer circumferential surface, often resulting in an oval-shaped deformation due to an incorrect size or uneven shrinkage.

In this case, the product is corrected for dimensional stability and shape through a second polishing process.

Secondary grinding of cylindrical ferrite magnets is largely divided into two types. One is a center hole in the center, which is assembled by inserting a shaft shaft into the hole and used as a component of a motor or other rotating assembly.

Since it is applied to a rotating body that rotates by a shaft axis, the essential element that is naturally required is concentricity that is involved in vibration or irregular rotational motion during rotation.

A device for correcting the concentricity is a cylindrical polishing device and an inner diameter reamer, and the inner diameter part is polished using a reamer, and the outer diameter uses a cylindrical polishing machine.

When grinding the outer surface of the magnet 10 using a cylindrical grinder, the magnets are brought into close contact with the headstock 13 and the tailstock 14 at both sides of the center hole 11 of the magnet 10 as shown in FIG. 2. (10) is fixed, and while rotating the magnet 10, the outer surface of the magnet 10 is polished with a tool to maintain a constant concentricity.

At this time, if the burr 12 is present in the center hole 11 as shown in FIG. 2, the outer surface of the magnet 10 between the main shaft 13 and the tailstock 14 may not be level, so that a constant concentricity is obtained. Polishing is not possible.

In addition, since the operator has to perform the machine setting and the origin calibration work one by one, the work speed is delayed, and since each worker works manually, there is a problem in that a defect occurs frequently due to deviation.

Literature 1. Korean Patent Office Publication No. 10-2013-0135086, "Polishing device and polishing method" Document 2. Korea Patent Office Registration Patent Publication No. 10-1952829, "Abrasive processing device for metal parts and polishing process using the same" Document 3. Republic of Korea Patent Office Publication No. 10-1988-0003705, "Spin type radial support device for rotating workpieces and a polishing machine equipped with the device and an automatic loading and unloading device"

The present invention has been devised to solve the above problems, and it is an object of the present invention to automatically polish a cylindrical magnet to have a high dimensional stability so as to have a constant concentric circle from the center hole to the outer surface. Purpose.

In order to achieve the above object, the cylindrical magnet polishing apparatus according to the present invention is formed with a predetermined number of magnet grooves 134 radially on the rim so that a portion of the outer surface of the magnet 10 is inserted in an exposed state, and the motor 132 A magazine 133 configured to rotate by; A magnet supply device for continuously supplying the magnet 10 to one position of one of the magnet grooves 134 of the magazine 133; A magnet actuator 129 for pushing the magnet 10 supplied to the magnet supply device and inserting it into any one of the magnet grooves 134 of the magazine 133; A first pin 136 inserted into both sides of the center hole 11 of the magnet 10 inserted into the other magnet groove 134 of the magazine 133 to fix and rotate the magnet 10; And a second pin 141; And a polishing wheel 104 that polishes the magnet 10 while rotating in close contact with the magnet 10 fixed by the first and second pins 136 and 141.

At this time, the magnet supply device is provided with a standby groove 127, a block 126 installed so that the standby groove 127 is located on one side of any one of the magnet grooves 134 of the magazine 133; An end guide 123 which is installed inclined downward so that the end reaches the standby groove 127 of the block 126, which sequentially supplies the magnet 10 to the standby groove 127; And an actuator 129 installed in the standby groove 127 and inserting the magnet 10 of the standby groove 127 into the magnet groove 134 of the magazine 133.

In addition, the first pin 136 is fastened to the headstock guider 107, the second pin 141 is fastened to the tailstock guider 111, and the headstock guider 107 and the tailstock guider ( 111) is characterized in that it is configured to move along the rail 106 horizontally installed in front of the polishing wheel 104.

In addition, the polishing wheel 104 is characterized in that it is configured to be able to move the slide in the direction of the magazine (133).

In addition, the insertion hole 139a is formed at the tip of the first pin 136, and the insertion piece 143 at the tip of the second pin 141 is inserted into the insertion hole 139a of the first pin 136 to magnet ( 10) is characterized by being configured to fix.

In addition, the distal end of the first pin 136 is formed by radially forming a cutout 138 and extending in a predetermined length in the axial direction, and radially formed at the distal end of the first pin 136 by the cutout 138. As the expansion piece 139 is formed, when the insertion piece 143 of the second pin 141 is inserted into the insertion hole 139a of the first pin 136, the extension piece 139 of the first pin 136 It is characterized in that it is configured to be in close contact with the inner wall of the center hole 11 of the magnet 10 to be opened while being elastically deformed.

The polishing apparatus of the present invention configured as described above is performed automatically without the need for the operator to manually set and calibrate the cylindrical magnet, so the operation speed is fast and no defect occurs.

In addition, since it is processed to have the same concentric circles from the center hole to the outer surface, it is possible to maintain high dimensional stability of the product.

1 is a perspective view showing a ferrite magnet.
Figure 2 is a view showing a state in which the magnet is fixed to polish the outer surface of the conventional cylindrical magnet.
Figure 3 is a perspective view showing a polishing apparatus according to the present invention.
Figure 4 is an exploded perspective view showing an exploded polishing apparatus according to the present invention.
Figure 5 is an exploded perspective view showing the feeding portion of the polishing apparatus according to the present invention.
Figure 6 is a perspective view showing a processing unit of the polishing apparatus according to the present invention.
7 to 9 are perspective views sequentially showing a process of grinding the magnet outer surface using the polishing apparatus according to the present invention.
10 is a perspective view showing a state in which the polishing apparatus according to the present invention fixes the magnet.
11 is a perspective view showing a first pin for fixing the magnet.
12 is a perspective view showing a second pin for fixing the magnet.
13 is a cross-sectional view showing a state in which the magnet is fixed using the first pin and the second pin.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the present invention and the accompanying drawings, and the same reference numerals in the drawings will be described on the assumption that they refer to the same components.

When one component in the detailed description of the invention or claims "includes" another component, it is not interpreted as being limited to only the component, unless specifically stated otherwise. It should be understood that it may further include.

Figure 1 is a perspective view showing a ferrite magnet, Figure 2 is a view showing a state in which the magnet is fixed to polish the outer surface of a conventional cylindrical magnet, Figure 3 is a perspective view showing a polishing apparatus according to the present invention, Figure 4 Is an exploded perspective view showing the polishing apparatus according to the present invention, FIG. 5 is an exploded perspective view showing the feeding part of the polishing apparatus according to the present invention, and FIG. 6 is a perspective view showing the processing portion of the polishing apparatus according to the present invention, 7 to 9 are perspective views sequentially showing a process of grinding the magnet outer surface using the polishing apparatus according to the present invention, and FIG. 10 is a perspective view showing a state in which the polishing apparatus according to the present invention fixes the magnet. 11 is a perspective view showing a first pin for fixing the magnet, FIG. 12 is a perspective view showing a second pin for fixing the magnet, and FIG. 13 is a first pin and a first pin It is a cross-sectional view showing a state in which the magnet is fixed using two pins.

3 to 6, the polishing apparatus 100 according to the present invention includes a machining section for polishing the outer surface of the magnet 10, and a feeding section for supplying the magnet 10 to the processing section.

As shown in FIGS. 3 and 4, the feeding part receives the feeder 121 on which the cylindrical magnet 10 is loaded, and the magnet 10 from the feeder 121, and sequentially turns the magnet 10 into the magazine 133. Consisting of a guide 123 to be transferred, and a magnet 133 to be radially formed, and a magazine 133 to receive the magnet 10 supplied from the phosphorus guide 123 in the magnet groove 134. .

The feeder 121 supplies the magnet 10 accommodated therein as a hopper to the in-guide 123. Since the feeder 121 is a known technique, detailed description thereof will be omitted.

And since one side of the in guide 123 is fastened to the feeder 121 and installed to be inclined downward in the direction of the magazine 133, the cylindrical magnet 10 supplied from the feeder 121 is a magazine along the in guide 123 It is configured to roll in 133 direction.

The other side of the in-guide 123 is connected to the rod groove 128 of the block 126 as shown in FIGS. 4 and 5.

The block 126 is configured such that the shaft of the motor 132 passes through the block 126 and rotates the magazine 133 as shown in FIG. 5, and the in-guide 123 is inserted into one side of the block 126 Grooves 127 are formed.

Therefore, the magnet 10 loaded on the feeder 121 is supplied to the standby groove 127 of the block 126 in turn along the in-guide 123.

A rod groove 128 is formed in the standby groove 127 of the block 126, and the rod 131 of the magnet actuator 129 is inserted into the rod groove 128 of the block 126.

And the magazine 133 is fastened in the direction in which the standby groove 127 of the block 126 is formed, and is configured to rotate by driving the motor 132. The motor 132 is preferably configured as a servo motor or a stepping motor since the magazine 133 must be rotated at an accurate displacement angle.

The magazine 133 is formed in a disk-shaped body, and a predetermined number of magnet grooves 134 are formed radially on the rim of the body.

When the loaded magnet 10 of the feeder 121 is supplied to the standby groove 128 of the block 126 along the in guide 123, the magnet 10 is on the side of the magnet groove 134 of the magazine 133. When the magnet actuator 129 is driven according to the signal of the control unit, the rod 131 inserted in the rod groove 128 of the block 126 advances and pushes the magnet 10 located in the standby groove 127. It is configured to be inserted into the magnet groove 134 of the magazine 133.

When the magnet 10 is inserted into the magnet groove 134 of the magazine 133, the magnet groove 134 is configured to expose a portion of the outer surface of the magnet 10.

As shown in FIGS. 3, 4, and 6, the horizontal rail 106 is installed in a straight direction on the upper surface of the base 101, and the main shaft guider 107 is disposed along the rail 106. The tailstock guider 111 is configured to slide.

The main shaft guider 107 is provided with a motor 108, and the main shaft 109 is installed on the shaft of the motor 108 so that the main shaft 109 is rotated by driving the motor 108, and the shim The tailstock 112 is installed in the rod guider 111.

And between the main shaft guider 107 and the tailstock guider 111 is configured such that the polishing wheel 104 is located. The abrasive wheel 104 is configured to rotate by the drive of the motor 103, the abrasive oil supply pipe 105 is located on one side of the abrasive wheel 104 is configured to supply the abrasive oil in the polishing process.

As shown in FIG. 4, a polishing wheel actuator 114 is installed on one side of the polishing wheel 104 so that the polishing wheel 104 slides in a direction perpendicular to the rail 106 by driving the polishing wheel actuator 114. It is configured to move.

The process of polishing the magnet 10 by the polishing apparatus 100 of the present invention configured as described above will be described in detail.

7 to 9 are views sequentially showing a process in which the polishing apparatus 100 polishes the magnet 10. In the drawing, the motor 132 for driving the in-guide 123, the block 126, and the magazine 133 is omitted.

And in FIGS. 7 to 9, the magnet 10 of which the polishing is completed by the polishing wheel 104 among the magnets 10 inserted into the magnet groove 134 of the magazine 133 is referred to as a 'grinding magnet 10b', Among the magnets 10 inserted into the magnet grooves 134 of the magazine 133, the magnets 10 that have not yet been polished are referred to as 'unpolished magnets 10a'.

The magnet 10 loaded on the feeder 121 is inserted into the standby groove 127 formed in the block 126 of FIG. 5 along the in-guide 123 and positioned on one side of the magnet groove 134 of the magazine 133 In the state, as shown in FIG. 7, the polishing wheel 104 slides in the direction of the magazine 133 and rotates in a contacted state to polish the outer surface of the magnet 10 in contact with the polishing wheel 104.

The magnet 10 in contact with the abrasive wheel 104 is inserted into the magnet groove 134 of the magazine 133, and the first pin 136 and the second pin 141 on both sides of the magnet 10, respectively. The first pin 136 inserted into the center hole 11 and fixed to the headstock 109 rotates and rotates the magnet 10 so that the outer surface of the magnet 10 is polished by the polishing wheel 104. do.

When the outer surface of the magnet 10 in contact with the abrasive wheel 104 is completed by the abrasive wheel 104 as shown in FIG. 7, the abrasive wheel 104 is moved rearward as shown in FIG. 8 by driving the abrasive wheel actuator 114. Slide moves.

And the first pin 136 and the second pin 141 of the magnet 10 while the main shaft guider 107 and the tailstock guider 111 slide along the rail 106 to fix the magnet 10 The magnet 10 restraints are released as it falls out of the center hole 11.

Then, the motor 132 of FIG. 5 is driven to rotate the magazine 133 by one click.

Here, 'one click' refers to the amount of rotation by which the magazine 133 rotates and one magnet groove 134 reaches the position of the neighboring magnet groove 134.

When the magazine 133 rotates by one click as described above, the polishing magnet 10b polished by the polishing wheel 104 moves by one click in the direction of the in-guide 123 by rotation of the magazine 133, and interlocks with this The unpolished magnet 10a located in the magnet groove 134 of the magazine 133 moves by one click to be positioned in front of the polishing wheel 104.

At this time, as illustrated in FIG. 9, while the actuator 129 is driven, the rod 131 pushes the magnet 10 located in the standby groove 127 of the block 126 of FIG. 5 in the direction of the magazine 133, and the magnet (10) is moved.

The magnet 10 moved by the rod 131 of the actuator 129 is an unpolished magnet 10a, which is pushed by the rod 131 while being inserted into the magnet groove 134 of the magazine 133. (10) is pushed to be detached from the magazine 133.

The magnet 10 detached from the magazine 133 is collected by being separated from the basket 122 of FIG. 3 while being removed from the magazine 133 as an abrasive magnet 10b having an outer surface polished by the abrasive wheel 104.

Thereafter, the polishing wheel 104 slides in the direction of the magazine 133, and the first pin 136 of the main shaft guider 107 and the second pin 141 of the tailstock guider 111 slide to move the magazine. The new unpolished magnet 10a located in front of the polishing wheel 104 is rotated by rotation of (133), and then rotated. In this state, the outer surface of the unpolished magnet 10a is polished while the polishing wheel 104 rotates.

As described above, the rotation of the magazine 133 is interlocked by the driving of the actuator 129 so that the abrasive magnet 10a is automatically replaced with a non-abrasive magnet 10b, and the abrasive magnet 10a is continuously abrasive wheel 104 ).

As described above, while the polishing wheel 104 polishes the magnet 10, the first pin 136 fastened to the headstock guider 107 and the second fastened to the tailstock guider 111 as shown in FIG. The pin 141 is inserted into the center hole 11 of the magnet 10 to rotate while fixing the magnet 10, and the first and second pins 136 and 141 must be fixed so as not to move the magnet 10. .

To this end, the first pin 136 is a body 137 is formed in the form of a rod or pipe, as shown in Figure 11, the front end of the body 137 is cut into a '+' or '*' form the shaft A cutout 138 having a shape extending in the direction is formed, and a predetermined number of extension pieces 139 are formed by the cutout 138.

12, the body 142 is formed in the form of a rod or a pipe, as shown in FIG. 12, and an insertion piece 143 is formed on one side of the body 137.

The first pin 136 and the second pin 141 configured as described above are inserted into the center hole 11 of the magnet 10 to securely fix the magnet 10 while being polished.

13, the first pin 136 fastened to the main shaft 109 of the main shaft guider 107 and the second pin fastened to the armrest 112 of the tailstock guider 111. The center holes 11 are inserted from both sides of the magnet 10.

At this time, as the insertion piece 143 of the second pin 141 is inserted into the insertion hole 139a of the first pin 136, the insertion piece 1430 of the second pin 141 is an extension piece of the first pin 136 Expand (139).

The first and second pins 136 and 141 firmly fasten and fix the magnet 10 by pressing the inner wall of the center hole 11 while the expansion piece 139 of the first pin 136 opens.

As described above, when the first and second pins 136 and 141 are firmly fixed to the magnet 10 and the outer surface of the magnet 10 is finished, the first blood 136 and the second pin 141 are the center holes of the magnet 10 (11), the magnet 10 is released from the restraint.

At this time, when the insertion piece 143 of the second pin 141 is removed from the insertion hole 139a of the first pin 136, the first pin 136 extension piece 139 is elastically restored, so that the other magnet 10 is fixed. It can also be used continuously.

The polishing apparatus of the present invention configured as described above is performed automatically without the need for the operator to manually set and calibrate the cylindrical magnet, so the operation speed is fast and no defect occurs.

In addition, since it is processed to have the same concentric circles from the center hole to the outer surface, it is possible to maintain high dimensional stability of the product.

The technical idea of the present invention has been described through the above-described embodiment.

It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can variously modify or change the embodiments described above from the description of the present invention.

In addition, although not explicitly shown or described, a person having ordinary skill in the art to which the present invention pertains can make various modifications including the technical spirit according to the present invention from the description of the present invention. Is self-evident, which still falls within the scope of the present invention.

The above-described embodiments described with reference to the accompanying drawings are described for the purpose of illustrating the present invention and the scope of the present invention is not limited to these embodiments.

10: magnet
10a: unpolished magnet
10b: abrasive magnet
11: Center Hall
100: polishing device
101: base
102: controller
103: motor
104: polishing wheel
105: abrasive oil supply pipe
106: rail
107: Headstock guider
108: motor
109: headstock
111: tailstock guider
112: tailstock
113: tailstock actuator
114: polishing wheel actuator
121: feeder
122: basket
123: In Guide
124: cover
125: sensor
126: block
127: waiting home
128: road groove
129: magnet actuator
131: load
132: motor
133: Magazine
134: magnet home
135: Out guide
136: first pin
137: body
138: incision
139: extension
139a: insertion hole
141: second pin
142: body
143: Insertion

Claims (6)

The inner surface of the magnet groove 134 is formed radially in the form of an arc so that the cylindrical magnet 10 inserted into the magnet groove 134 is inserted into a state in which a portion of the outer surface of the magnet 10 is exposed without falling on gravity. , A magazine 133 that rotates one click by the motor 132 to the position of a neighboring magnet groove 134 by one motor groove 134;
Block 126 is formed so that the standby groove 127 is formed, and the standby groove 127 is located on one side of one of the magnet grooves 134 of the magazine 133;
An end guide 123 which is installed inclined downward so that the end reaches the standby groove 127 of the block 126, which sequentially supplies the magnet 10 to the standby groove 127;
While inserting the magnet 10 supplied from the in guide 123 to the standby groove 127 of the block 126 into the magnet groove 134 of the magazine 133, at the same time it is inserted into the magnet groove 134 An actuator 129 for pushing and removing the polished magnet 10;
The insertion hole 139a is formed at the tip, and the distal end where the insertion hole 139a is formed is radially formed to extend in the axial direction, so that the extension piece 139 is formed radially at the tip to form a magnet groove ( 134) the first pin 136 is inserted into the center hole 11 of the magnet 10 is inserted;
It is inserted into the insertion hole (139a) of the first pin 136 at the tip end to open the extension piece 139 of the first pin 136 so that the extension piece 139 is in close contact with the inner wall of the center hole 11 of the magnet 10. A second pin 141 provided at the tip of the insertion piece 143 to be provided;
Cylindrical magnet grinding apparatus characterized in that it comprises; a polishing wheel 104 for grinding the magnet 10 while rotating in close contact with the magnet 10 fixed by the first and second pins 136 and 141.
delete According to claim 1,
The first pin 136 is fastened to the headstock guider 107, the second pin 141 is fastened to the tailstock guider 111,
Cylindrical magnet grinding apparatus characterized in that the main shaft guider 107 and tailstock guider 111 is configured to move along the rail 106 horizontally installed in front of the polishing wheel 104.
According to claim 1,
The polishing wheel 104 is a cylindrical magnet polishing apparatus characterized in that it is configured to slide in the direction of the magazine (133).
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