JPH0639890Y2 - Cup grinding wheel - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention supports a plate material to be punched, and a plate material supporting surface of a die (die) and a tip surface of the punch which are arranged to face the punch. The present invention relates to a cup-shaped grinding wheel used in a grinder device for grinding and polishing.

[Prior Art] As a conventional grinder device, as shown in FIG. 8, a scroll chuck 3 is provided on a table 2, and a head 6 is vertically mounted on a cylindrical column 4 vertically installed on the table 2. It is assembled so as to be slidable and swingable around the column 4. The head 6 has an assembly member 6a attached to the column 4, and the assembly member 6a has a threaded rod 5 supported by a bearing 6b.
Are arranged in the vertical direction. An elevating handle 7 is fixedly integrated with the screw rod 5, and the handle 7 is arranged on the upper end surface of the assembly member 6a via a bearing 6c. The assembly member 6a and the screw rod 5 are opposed to each other by the bearings 6b and 6c. Can rotate. Further, the screw rod 5 is screwed with the upper lid 4a of the support column 4, and the assembly member 6a can slide up and down by the rotation of the screw rod 5. Drive motor 8 for head 6
A drive shaft 9 rotated by a motor 8 is supported in the head 6, and a cup-shaped grinding wheel 10 is connected to the rotary drive shaft 9.

Then, the work W is fixed by the chuck 3, the height of the head 6 is adjusted by the lifting handle 7 to set the cutting amount of the grindstone 10, and then the drive motor 8 is driven to rotate the grindstone 10 and the grip 12 is held. By holding the head 6, the head 6 is reciprocally rocked around the supporting column 4, whereby the surface of the work W is ground.

[Problems to be solved by the device]

However, in the conventional grinder device described above, the grinding wheel 10 is made of ceramics and the grinding wheel grinding unit is also integrated with the grinding wheel holder.
The grinding amount is very small. For cutting 0.1 mm, for example, the cutting amount must be set to 0.01 mm and the head 6 must be reciprocally rocked many times, and this must be repeated nearly 10 times. There was a problem that the work time was very long.

Also, if the depth of cut is set to a large value, the grindstone grinding part will be severely worn and the life of the grindstone will be extremely short, and the grinding amount will be different between the grinding start side and the grinding end side of the workpiece, and a uniform ground surface cannot be obtained. .

In addition, there is a problem that the head 6 undulates at the time of grinding and the ground surface of the work becomes wavy. This is because the head 6 is attached to the column 4 so as to be able to move in two directions, i.e., swinging and sliding up and down, so that there is a large amount of backlash in the support portion, and the whetstone fluctuates up and down during grinding. It seems to do. More specifically, the support 4 and the assembly member
This is because there is a gap between 6a to enable vertical sliding and rotation, and also the support 4 and the assembly member when the work is ground.
This is probably because the vertical lap length 1 with 6a is short and the backlash is further increased.

The present invention has been made in view of the above-mentioned problems of the prior art,
It is an object of the present invention to provide a cup-shaped grinding wheel capable of smoothly grinding a work without vibration even if the depth of cut is increased.

[Means for Solving the Problems]

In order to achieve the above object, in a cup-shaped grinding wheel according to the present invention, a cylindrical cup-shaped grinding wheel holder having a substantially U-shaped cross-section with one axial end closed, and a peripheral edge of an opening of the grinding wheel holder. A cup-shaped grinding wheel composed of a grinding wheel grinding portion provided, wherein a ring-shaped holder vibration-preventing rim that closes an annular shape or an opening that extends along the opening inner peripheral edge of the grinding wheel holder. Is to be provided.

[Action]

An annular or disc-shaped rim provided on the inner peripheral edge of the opening of the grindstone holder increases the rigidity of the holder and suppresses vibration of the holder peripheral wall, so the grindstone rotates smoothly without blurring,
A uniform ground surface can be obtained without generating noise.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of the grinder device of the present invention.

In these figures, reference numeral 20 is a column, which is vertically installed on a base 21 which is placed and fixed on the floor. The pillar 20 is
The interior is hollowed out, a grinding oil tank 22 and a pump 24 are provided in the support column, and the grinding oil is supplied to the work grinding surface via the flexible hose 26 and the nozzle 28. The reference numeral 27 is a grinding oil return pipe formed in a fixed table, which will be described later, and constitutes a return line of the grinding oil circulation system.

Reference numeral 30 is a fixed table which is fixed to the column 20 and extends horizontally. A horizontal guide 32 is provided on the fixed table 30 in the left-right direction (perpendicular to the plane of FIG. 1). A movable table 34 is attached to the guide 32 via a bearing mechanism (not shown) so that it can slide in the extending direction of the guide 32.

A drive mechanism 40 for sliding the moving table 34 is shown in FIG. 3, and includes a pair of rollers 42a, 42b provided on the front side wall of the fixed table 30 at a predetermined interval in the left-right direction, and between the rollers. The traveling wire 44 is wound and stretched. The traveling wire 44 is wound around rollers 42a and 42b, and both ends of the wire are connected to arm members 46 projecting from the side wall of the moving table 34 to form an endless shape. The traveling wire 44 travels between the rollers 42a and 42b by the turning operation of the handle 45 provided on the roller 42a, and the moving table 34 slides on the guide 32 as the traveling wire 44 travels. The roller 42b is supported by a tension adjusting bolt (not shown) that adjusts the tension of the traveling wire 44.

An electromagnetic chuck 36 having a fixing surface 36a on the table is provided at a substantially central portion in the longitudinal direction of the moving table 34. The electromagnetic chuck 36 has a built-in exciting portion in which a coil is wound around an iron core, and the exciting portion is excited by energizing the coil,
The work W, which is a magnetic material, is attracted to the fixing surface 36a. Then, the work W is placed on the fixing surface 36a,
The work W can be fixedly integrated with the moving table 34 by the exciting action of the electromagnetic chuck 36, and the work W can be slid integrally with the moving table 34.

Reference numeral 50 denotes a head which extends horizontally above the fixed table 30 so as to be orthogonal to the movable table 34 and is vertically slidably attached to the column 20. This head 50
Is a vertical guide installed vertically on the table side of the column 20.
It is attached to 51 so as to be slidable in the vertical direction via a bearing mechanism (not shown), and is also attached to a screw rod 52 vertically provided on the left side surface of the column 20 via a bracket 54. The screw rod 52 integrated with the handle 55 is a bracket
It is supported by a bearing (not shown) in 54, and this structure is an engagement structure (the first structure) between the assembling member 6a and the screw rod 5 of the prior art.
(See Fig. 10). Further, the screw rod 52 is screwed with a screw receiver 52a protrudingly provided on the side wall of the support column 20.
The rotation causes the bracket 54 to slide in the vertical direction. When the screw rod 52 is rotated by the handle 55, the head
The 50 slides in the vertical direction, and its vertical position can be adjusted.

The head 50 has a housing structure and carries a drive motor 56 on an upper portion thereof, and a rotary drive shaft 58 rotated by the drive motor 56.
Extend vertically through the head 50. Note that reference numeral 59a,
59b is a bearing that supports the rotary drive shaft 58. A cup-shaped grinding wheel 60 is connected to the lower end of the rotary drive shaft 58 with the wheel grinding portion 64 facing downward.

The grinding wheel 60, as shown in FIG. 4 and FIG.
A cup-shaped grindstone holder 62 having a substantially U-shaped cross section, in which a hole 61 for connecting to the rotary drive shaft 58 is formed, and the holder 62.
And a grindstone grinding section (borazon) 64 integrated with the holder 62 around the periphery of the opening. The holder 62 mainly comprises a holder main body 62a made of aluminum die-cast with a substantially U-shaped cross section, and an aluminum donut disc-shaped rim 62 for reinforcement is provided on the inner circumference of the holder main body on the side of the peripheral wall opening.
b is installed. The rim 62b is integrated with the holder main body 62a by fastening bolts 65, and the rigidity of the holder main body 62a is increased to suppress the vibration of the peripheral wall. The reference numeral 64a indicates a grinding wheel portion 64 in order to enhance the grinding effect.
The slits are formed at a predetermined pitch.

In a simple cup-shaped grindstone holder without the rim 62b, there is a problem that the holder vibrates during the grinding of the work W, the grinding surface is not smooth, and furthermore, the work is not possible due to the shuddering noise caused by the vibration of the peripheral wall. It is considered that this is because the grindstone grinding part is a borazone that is less likely to wear, so that the grinding resistance between the work W and the grindstone grinding part is large, and this reaction force is transmitted to the holder side, which causes the peripheral wall of the holder to vibrate. However, in the present embodiment, the grinding wheel used has the rigidity of the peripheral wall of the holder increased by the rim 62b, and the peripheral wall of the holder does not vibrate during work grinding,
Therefore, no noise is generated.

To connect the grinding wheel 60 to the rotary drive shaft 58,
As shown by the chain double-dashed line in Figure 2, fit the collar 63 into the hole 61,
The periphery of the hole 61 of the holder 62 is clamped by the rotary drive shaft 58 and the collar 63 by tightening the bolt 66 to connect them.

Next, the operation procedure of the grinder apparatus of this embodiment will be described.

First, the work W to be ground is placed on the work fixing surface 36a of the electromagnetic chuck 36 and positioned, and the work W is fixed to the moving table 44. Then, the handle 55 is rotated to adjust the height of the head 50 with respect to the work W, and the cutting amount of the grindstone grinding portion 64 is set to a predetermined value. Next, the drive motor 56 is driven to rotate the grinding wheel 60,
The handle W is operated to reciprocate the work W integrally with the moving table 34 along the guide 32. The work W slides integrally with the moving table 34, so that the work W comes into contact with the grinding wheel 60 and is ground to obtain a smooth ground surface. When further grinding is desired, the head 50 is lowered again to set the cutting amount of the grindstone, and the grinding is performed according to the procedure described above. In this way, the surface of the work W can be ground by a predetermined depth.

According to the grinder apparatus according to the present embodiment, in order to grind the surface of the work W by 0.1 mm, the step of sliding the moving table 34 back and forth once or twice with a cutting amount of 0.02 to 0.03 mm is performed in three to three steps.
If it is repeated 4 times, the number of reciprocating swings of the head of the conventional grinder apparatus is significantly smaller (several tens of times), and the working time is shortened accordingly. Further, the ground surface is very smooth, and there is no problem such as the generation of slicing noise during grinding, and workability is remarkably improved.

As a result of setting the cutting depth to 0.02 mm and using the device of this embodiment, the difference in the grinding amount between the front end of the work surface (grinding start side) and the rear end of the work surface (grinding end side) It was only 5μ, and it was confirmed that the processing accuracy was very good.

FIG. 6 shows another embodiment of the grinding wheel, which is a rim 62c.
Has a structure integrally formed with the holder body 62a.
With such a structure, the rigidity of the grindstone is further increased, the number of parts of the grindstone is small, and the grindstone can be easily attached and replaced.

FIG. 7 shows another embodiment of the grinding wheel, which is a disc-shaped rim 62 having no holes as a reinforcing rim.
It has a structure using d. In order to mount the grinding wheel in this embodiment on the grinder device, first, the holder body 62a is fastened to the tip of the rotary drive shaft, and then the rim 62d is fastened to the holder body 62a to be integrated as a grinding wheel. is there.

[Effect of device]

As is apparent from the above description, according to the cup-shaped grinding wheel of the present invention, the rigidity of the wheel holder is increased by the annular or disc-shaped rim provided on the inner peripheral edge of the opening of the wheel holder. Vibration of the peripheral wall of the holder during work grinding is suppressed, noise is not generated during grinding, and a uniform ground surface can be obtained. This is the same even when the cutting amount of the work is large.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a grinder apparatus according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a schematic view of a moving table drive mechanism, and FIG. 4 is a cup-shaped grinding wheel according to the present invention. FIG. 5 is a vertical sectional view of the cup-shaped grinding wheel, FIG. 5 is a vertical sectional view of another example of the cup-shaped grinding wheel, and FIG. FIG. 8 is a front view of a conventional grinder device. W …… Workpiece, 20 …… Post, 30 …… Fixed table, 32 …… Horizontal guide, 34 …… Movable table, 36 …… Electromagnetic chuck, 50 …… Head, 51 …… Vertical guide, 56 …… Drive motor , 58 …… Rotary drive shaft, 60 …… Cup type grinding wheel, 62a …… Whetstone holder, 62b, 62c, 62d …… Reinforcing rim.

Claims (1)

[Scope of utility model registration request] 1. A cup-shaped grinding wheel comprising a cup-shaped grindstone holder having a substantially U-shaped cross-section whose one axial end is closed, and a grindstone grinding portion provided around the opening of the grindstone holder. A cup-shaped grinding wheel, characterized in that an inner periphery of the opening of the grindstone holder is provided with an annular ring extending along the inner periphery of the opening or a disk-shaped holder vibration preventing rim for closing the opening.