JPH0551421B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a surface grinding device having a rotating body, and in particular, the end side of the cutting blade located on the front side in the rotational direction of the rotating body is connected to the outside of the rotating body. The present invention relates to a surface grinding and finishing device having a rotating body that can improve the efficiency of grinding and finishing the surface of a surface to be finished, such as a floor or wall, by oriented the rotating body and providing a cutting edge on the tip side of a radial arm.

[Prior Art] Surface grinding and finishing devices are used for finishing surfaces such as concrete floors and ceilings of buildings. As the cutting edge of the above-mentioned device, a superhard material such as a diamond chip or a carbide chip is used.

Conventionally, as shown in FIG. 4, the cutting blade 52 has a height h, a thickness t, and a length l (lower case L), and is a disc-shaped rotating body that is attached to a portable surface grinding device such as a sander. A plurality of them are arranged to protrude from one surface in the direction of the finished surface of 54. The rotating body 54 is
It is fixed to the tip of a drive shaft 56 that is rotated by a drive section.

[Problems to be Solved by the Invention] By the way, in the conventional device, the cutting blade 52 is
A plurality of blades are provided in the circumferential direction of the cutting blade attachment surface 58, which is one surface of the rotating body 54.

However, the height h of the cutting blade 52 protruding from the cutting blade attachment surface 58 is considerably smaller than the thickness t.
For this reason, when performing finishing grinding work while moving the device laterally, there is a problem in that the grinding device does not stick to the object to be ground and deep cutting cannot be performed, resulting in a decrease in work efficiency.

In addition, with conventional equipment, when grinding and finishing the surface of a workpiece that has an extremely uneven shape in the vertical direction, it is not possible to move the cutting blade to follow the uneven shape. The surface of the part to be finished cannot be uniformly ground because there is a lot of uncut material. For this reason, there is a problem in that the efficiency of the grinding and finishing work is reduced due to factors such as the need to grind the surface of the part to be finished redundantly.

Furthermore, in conventional equipment, the thickness t of the cutting blade is relatively large and the cutting blade makes surface contact with the object to be ground, so the total contact area of the grinding surface is large, and when grinding the object, The surface pressure of the cutting edge is low, and as mentioned above, there is a drawback that it becomes difficult to stick to the workpiece to be ground, resulting in a decrease in work efficiency. In order to overcome this drawback, when the cutting edge is strongly pressed against the workpiece, the frictional resistance increases, the amount of heat generated by friction increases, and no cooling effect can be expected. The wear and tear will increase and the service life will be shortened. Furthermore, when the object to be ground is made of a soft material such as rubber, the object to be ground becomes soft and clogs occur, resulting in a reduction in work efficiency and less versatility. Furthermore,
In order to increase the surface pressure of the cutting blade, the cutting blade is strongly pressed against the workpiece, so the equipment needs to be driven at low to medium speeds. This has the disadvantage of requiring a driving force, resulting in energy loss.

Furthermore, if a long and thin cutting edge is simply provided on one surface of the rotating body on a central circle with a predetermined radius from the center of the rotating body, the cutting edge will not stick during use, and the grinding efficiency will deteriorate. There was an inconvenience.

In addition, when a rotating body is constructed by providing a cutting blade on a rotating disk with a continuous outer peripheral edge, the cutting blade has poor ability to follow the surface of the part to be finished, resulting in a reduction in work efficiency. It was hot.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned inconvenience, the object of the present invention is to provide a rotary disc that is connected to the base of the central portion and the stepped portion that is connected to the base and is oriented in the direction of the finished surface. It consists of an annular connecting part and a plurality of arms radially connected at equal intervals in the circumferential direction on the outer edge of the annular connecting part, and also rotates one end side of the cutting blade located on the rear side in the rotational direction of the rotating body. The cutting blade is oriented toward the center O of the body, and the other end of the cutting blade located on the front side in the rotational direction of the rotating body is oriented toward the outside of the rotating body, and the cutting blade is arranged on one surface on the tip side of the arm. By doing so, it is possible to improve the grip of the cutting blade and enable deep cutting, and even when the surface of the part to be finished is uneven, each cutting blade can be moved forward and backward independently to ensure that the surface can be ground, improving the efficiency of grinding and finishing work. It is an object of the present invention to realize a surface grinding and finishing device having a rotating body that can be used for grinding and finishing work on various types of objects to be ground and can be used for a wide variety of purposes.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a surface grinding and finishing device that performs surface finishing by bringing a cutting blade attached to a rotating disk of a rotating body into contact with a grinding surface. In the above, the rotating disk has a base in the central portion, a stepped portion connected to the base and oriented in the direction of the finished surface, an annular connecting portion connected to the stepped portion, and an outer edge of the annular connecting portion in the circumferential direction, etc. It is composed of a plurality of arms arranged radially at intervals, and one surface on the distal end side of the arm has a predetermined height H in the direction of the finished surface and a minimum thickness T sufficient to maintain strength. A cutting blade that protrudes and has a predetermined length L in the rotational direction of the rotary body is provided, and one end side of the cutting blade located on the rear side in the rotational direction of the rotary body is directed toward the center O side of the rotary body. In addition, the other end of the cutting blade located on the front side in the rotational direction of the rotating body is oriented toward the outside of the rotating body, and the cutting blade is disposed on one surface on the distal end side of the arm. Features.

[Function] According to the configuration of the present invention, during the grinding and finishing work, an action is produced to grind the stepped side portion of the object to be ground, and each arm portion that moves forward and backward independently and elastically deforms. The cutting blade reliably reaches the recesses on the surface of the workpiece to grind the surface uniformly, and the contact area of the cutting blade that comes into contact with the workpiece is reduced, increasing the surface pressure of the cutting blade. It improves the grip of the blade and increases the cutting effect on the surface, thereby improving the efficiency of grinding and finishing work. In addition, it can be used for finishing grinding of various types of materials such as soft materials, increasing versatility.Furthermore, the amount of heat generated by friction is reduced and the cutting edge has a longer service life due to cooling effects. lengthen.

[Embodiments of the Invention] Examples of the present invention will be described in detail and specifically below based on the drawings.

1 and 2 show an embodiment of the invention. In FIG. 1, 2 is a rotating body of a surface grinding and finishing device. The rotating body 2 is composed of a rotating disk 4 made of an elastically deformable member such as an elastic metal plate, and a plurality of cutting blades 6 made of a superhard material such as a diamond chip or a carbide chip.

The rotating disk 4 includes a base 8 at the center, a stepped portion 10 connected to the base 8 and oriented toward the finished surface, and an annular connecting portion parallel to the base 8 and connected to the stepped portion 10. 12, and six arm portions 14, for example, which are radially connected to the outer edge of the annular connecting portion 12 at equal intervals in the circumferential direction.

A mounting hole 16 is formed in the center of the base 8 for inserting and mounting the tip of a drive shaft (not shown).

The arm portion 14 is formed to have a predetermined length W and a predetermined width L, and has a cutting blade support piece 18 bent in the direction of the finished surface at the free tip end thereof.

This cutting blade support piece 18 is connected to the mounting hole 16 of the base 8.
An outer circumferential circle with a radius D2 centered on the center S1 at a position rotated 60 degrees clockwise from a point on the inner circumferential end 16a of which intersects an extension of the center line C of the arm portion 14 passing through the center O of the rotating body 2. It is formed to be located at OC2.

The cutting blade 6 is attached to the cutting blade support piece 18 in contact with the inner peripheral surface thereof.

This cutting edge 6 has a predetermined height H as shown in FIG.
1. It is formed to a predetermined thickness, that is, the minimum thickness T1 sufficient to maintain strength, and the same length L as the width of the cutting blade support piece 18 (see FIG. 1), and the width of the cutting blade support piece 18 is An insertion hole 20 is formed in a curved manner so as to be in contact with the inner circumferential surface and is formed on the free end side of the arm portion 14.
It is fixed to the cutting blade support piece 18 by a fixing screw 22, which is an attachment means that is inserted through the cutting blade support piece 18.

Thereby, the axial center of the cutting edge 6 is located on the circumferential circle PC2 having the radius R2 and centering on the center S1. Therefore, as described above, one end side 6a of the cutting blade 6 is located on the center O side of the rotating body 2, and the other end side 6b is located on the outside.

Similarly, each of the cutting blades 6 attached to the distal end side of the other arm portion 14 has centers S2, S3, S4 located at equal intervals in the circumferential direction on the inner circumferential end 16a of the attachment hole 16,
They are provided around S5 and S6 and with each center line C as a reference.

As a result, each cutting blade 6 attached to the distal end side of each arm 14 of the rotary disk 4 has one end 6a located on the rear side in the rotation direction X of the rotary body 2 at the center O of the rotary body 2. direction of rotation of the rotating body 2
The other end sides 6b located on the forward side of the rotating body 2 are located facing toward the outside of the rotating body 2.

The rotating body 2 configured in this manner is attached to the tip of a drive shaft of a surface grinding and finishing device.

Therefore, during surface grinding and finishing work, the cutting blade 6 is brought into contact with the surface of the part to be ground, and the rotating disk 4 applies a pressing force to elastically deform the surface grinding and finishing device 2. The cutting blades 6 can be moved forward and backward independently according to the uneven shape of the surface by strongly pressing the surface of the part to be finished using elastic force and utilizing the elastic deformation caused by warping or twisting of the rotary disk 4. It was configured as follows.

Next, the operation of this embodiment will be explained.

During surface grinding and finishing work, first, the rotating body 2 attached to the drive shaft of the surface grinding and finishing device is rotated. When the cutting blades 6 of the rotary body 2 are pressed toward the surface of the substrate, the stepped portion 10, the annular connecting portion 12, and each arm portion 14 of the rotating disk 4 are elastically deformed, so that each cutting blade 6 is pressed against the surface of the substrate. Pressed upwards strongly.

Then, the surface grinding and finishing device is moved laterally to finish the surface of the substrate while grinding the object to be ground. At this time, if the surface of the substrate is uneven, the individual cutting blades 6 move forward and backward independently depending on the unevenness of the surface. That is, since the stepped portion 10, the annular connecting portion 12, and the arm portions 14 of the rotating disk 4 are elastically deformed by warping or twisting, each cutting edge 6 on the tip side of each arm portion 14 cuts the surface of the substrate due to the elastic force. The grinder follows the uneven shape of the substrate to reach even the recesses of the substrate, eliminating any uncut parts and uniformly grinding the surface of the substrate. Therefore, it is not necessary to grind the surface of the substrate redundantly, so that it is possible to improve the efficiency of the grinding and finishing work.

Furthermore, when the rotary body 2 rotates in the rotational direction This creates an action of grinding the part, improves the grip of the cutting blade 6, and enables deep cutting.It reaches the concavities on the surface of the part to be finished and grinds this surface uniformly, and the cutting blade 6 By reducing the contact area and increasing the surface tearing effect,
Grinding and finishing work efficiency can be greatly improved and work time can be shortened.

Furthermore, by forming the rotating disk 4 of the rotating body 2 from an elastic metal plate, the cutting blade 6 can be moved forward and backward with a simple structure, the number of parts is reduced, and maintenance and inspection are easy. It can be inexpensive.

Furthermore, the rotary disk 4 includes a stepped portion 10, an annular connecting portion 12 connected to the stepped portion 10, and a radial arm portion 1 having a predetermined length W connected to the annular connecting portion 12.
4, when the rotating disk 4 is pressed, the rotating disk 4 effectively presses the cutting blade 6 onto the base surface with an appropriate elastic force, so that the grinding work of the object to be ground and It becomes possible to efficiently perform finishing work on 32 surfaces of the substrate.

In addition, since the thickness of the cutting edge 6, that is, the minimum thickness T1 sufficient to maintain strength, is smaller than the height H1,
It is possible to increase the surface pressure of the cutting edge 6, improve the grip, and improve the efficiency of grinding and finishing work.

Furthermore, since the total contact area of the cutting blade 6 with respect to the grinding surface is small, frictional resistance can be reduced, work can be performed with low power, and energy loss can be prevented. Also,
In addition to reducing the amount of heat generated by friction and minimizing the wear and tear on the cutting blade 6, the height H1 of the cutting blade 6 is considerably larger than the thickness T1, so when the rotor 2 rotates, the cutting blade 6 itself is exposed to the cooling fins. fulfills its function and receives a cooling effect,
The service life of the cutting blade 6 is extended. Furthermore, it prevents the object to be ground from becoming soft and clogging, and high-speed rotation is possible, increasing the working capacity. It is also suitable for grinding soft objects such as Anzucar, and can be highly versatile.

Note that this invention is not limited to the above-mentioned embodiments,
Of course, various applications and modifications are possible.

For example, as shown in FIG. 3, the tip side of the arm 14 is bent to protrude by a predetermined height M in the direction of the finished surface to form a cutting blade base 42 with a predetermined thickness N, and this cutting blade base 42 is provided with a diamond grating. The cutting edge portion 46 is formed by adhering an abrasive material 44 made of ultra-hard particles such as thread or carbide grit by an adhesion means such as electrodeposition. Thereby, this cutting edge portion 46 is formed to have a height H1 and a thickness T2. As a result, the base portion 8, step portion 10, annular connecting portion 12, arm portion 14, and cutting blade base portion 42 of the rotary disk 4 are integrally molded using equipment such as a press,
Just by attaching the abrasive material 44 to the cutting blade base 42,
The rotating body 2 having the cutting edge portion 46 can be easily configured, making mass production easy and inexpensive. Furthermore, when the abrasive material 44 is worn out, all that is required is to attach a new abrasive material to the cutting blade base 42.
The work process can be accomplished easily and is economically advantageous.

[Effects of the Invention] As is clear from the above detailed description, according to the present invention, the rotary disk is connected to the base of the central portion and the step portion connected to the base and oriented toward the finished surface. It is composed of an annular connecting part and a plurality of arms radially connected at equal intervals in the circumferential direction on the outer edge of the annular connecting part, and one surface on the distal end side of the arm part has a predetermined height H in the direction of the finished surface. A cutting blade having a minimum thickness T sufficient to maintain strength and protruding and having a predetermined length L in the rotational direction of the rotating body is provided, and one end side of the cutting blade located on the rear side in the rotational direction of the rotating body is provided. Center of rotation O
By arranging the cutting blade on one surface of the distal end side of the arm, the other end of the cutting blade, which is located on the front side in the rotational direction of the rotating body, is oriented toward the outside of the rotating body. This creates an action that creates a series of step-side parts on the workpiece, and each arm that moves back and forth independently ensures that the cutting edge reaches even the recesses on the surface of the workpiece, resulting in a uniform surface. In addition to reducing the contact surface of the cutting blade that comes into contact with the workpiece, it increases the surface tearing effect and improves the grip of the cutting blade, which greatly improves the efficiency of surface grinding and finishing work. obtain.

In addition, it increases versatility by making it possible to grind and finish a wide variety of soft and hard materials, and also extends the useful life of the cutting blade due to factors such as reducing heat generation due to friction and receiving a cooling effect. It is possible.

Furthermore, since the total contact area of the cutting edge with the grinding surface is small, frictional resistance can be reduced, work can be performed with low power, and energy loss can be prevented.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 being a bottom view of a rotating body, and FIG. 2 being a partial end view taken along the - line in FIG. 1. FIG. 3 shows another embodiment of the present invention, and is a partial end view of the rotating body. Fourth
The figure is a perspective view of a conventional rotating body. In the figure, 2 is a rotating body, 4 is a rotating disk, 6 is a cutting blade, 8 is a base, 10 is a stepped part, 12 is an annular connecting part, 14 is an arm part, and 18 is a cutting blade support piece.

Claims (1)

[Claims] 1. In a surface grinding and finishing device that performs surface finishing treatment by bringing a cutting blade attached to a rotating disk of a rotating body into contact with a grinding surface, the rotating disk is attached to a base of a central portion and a finishing device connected to the base of the rotating body. It is composed of a stepped portion oriented in the plane direction, an annular connecting portion connected to the stepped portion, and a plurality of arm portions connected radially at equal intervals in the circumferential direction on the outer edge of the annular connecting portion. A cutting edge is provided on one surface on the tip side, protruding in the direction of the finished surface with a predetermined height H and a minimum thickness T sufficient to maintain strength, and having a predetermined length L in the rotational direction of the rotating body. , one end side of the cutting blade located on the rear side in the rotational direction of the rotary body is directed toward the center O side of the rotary body, and the other end side of the cutting blade located on the front side in the rotational direction of the rotary body A surface grinding and finishing device having a rotary body, characterized in that the cutting blade is disposed on one surface on the distal end side of the arm portion, with the cutting blade being directed toward the outside of the rotary body.