JPS6343015Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a diamond wheel lapping machine that uses a single driving source and eliminates the need for regular supply of lapping agent.

Conventionally, a diamond wheel has been used to polish a cutting tool or the like, but since the diamond wheel itself is also worn and deformed, it is necessary to perform corrective polishing of the diamond wheel. In this case, to polish a diamond wheel, place the diamond wheel on a surface plate, and rotate the surface plate and diamond wheel in opposite directions while periodically supplying lapping agent between the two to perform lapping. I was gone. According to this conventional method, since both the surface plate and the diamond wheel rotate, the lapping agent not only scatters and contaminates the surrounding area, but also requires a lapping agent supply device. Since multiple motors are required to drive the wheels, the lapping machine has the disadvantage of being large and expensive.

This idea was made to eliminate the above-mentioned drawbacks.The surface plate was fixed without rotating, and the lapping was performed while the diamond wheel rotated and revolved on the surface plate. It is. This invention will be explained below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of this invention.
In this figure, reference numeral 1 denotes a base, on which a support column 2 is attached, and a support plate 3 is attached to this. A hole 4 is provided in the center of the support plate 3, a bearing part 5 is attached to this hole 4, and bearings 6,
6 is placed. A first gear (hereinafter referred to as a sun gear) is provided on the outer periphery of the bearing portion 5 and is integrally or separately therewith.
7 is fixed in position. A motor mounting plate 9 is fixed onto the support plate 3 by a column 8. Reference numeral 10 denotes a motor, the output shaft (not shown) of which is connected to a reducer 11, and a drive shaft 13 is engaged with the output shaft 12 of the reducer 11 by a key 14 so as to rotate as one unit. The shaft 13 projects downward from the support plate 3, that is, in the direction toward the base 1, and is supported by the bearings 6, with its lower end facing the upper surface of the base 1. An arm plate 15 is attached to the lower end of the drive shaft 13.
are engaged using a key 16 so as to rotate together, and a nut 18 is attached to a threaded portion 17 provided on the drive shaft 13.
By screwing together the arm plate 15 and the drive shaft 13
It is fixed at A hole 19 is provided in the arm plate 15, into which a bearing part 20 is attached, and bearings 21, 21 are arranged above and below inside the hole 19. Reference numeral 22 denotes a drive shaft for polishing, which is supported by bearings 21, 21, and a large diameter portion 23 formed on the upper part of the drive shaft is supported by bearings 21, 21.
It comes in contact with the top surface of the machine to prevent it from falling. Drive shaft 22
A second gear (hereinafter referred to as a planetary gear) is located at the upper end of the
24 is fixed, and this planetary gear 24 is the sun gear 7.
is engaged with. A sliding tube 2 is attached to the lower end of the drive shaft 22.
5 is loosely fitted, and a pin 27 is fixed to the drive shaft 22 in a long hole 26 formed in the axial direction of the sliding tube 25.
are engaged to prevent the sliding tube 25 from falling as shown in the figure. Further, a spring 28 is installed between the upper end of the sliding cylinder 25 and the lower bearing 21, which acts to separate the two. Furthermore, a protrusion 29 is formed at the lower end of the sliding tube 25. Reference numeral 30 denotes a weight, which has a hole 31 in its center and a keyway 32 formed therein, into which a protrusion 29 engages so as to be able to move only up and down. A guide pin 33 is attached to the weight 30 toward the bottom surface.
34 is a diamond wheel, which has a guide hole 35 at a position corresponding to the guide pin 33 of the weight 30, and by fitting the guide pin 33 into this guide hole 35,
The weight 30 and the diamond wheel 34 can rotate together. 36 is a surface plate fixed on the base 1, and a drive shaft 1 is mounted on the upper surface of the central part.
The lower ends of 3 are made to face each other. 37 is a wrapping agent, which is supplied onto the surface plate 36.

Next, the operation will be explained. When installing the diamond wheel 34, the diamond wheel 34 to be polished is placed on the surface plate 36, and the weight 30 is placed thereon so that the guide pin 33 fits into the guide hole 35. On the other hand, the sliding tube 25 is lifted against the spring 28, and the lower end of the sliding tube 25 and the surface plate 3 are
6, and place the weight 30 on which the diamond wheel 34 is attached first onto the surface plate 3.
6 is moved and positioned, and the protrusion 29 at the lower end of the sliding cylinder 25 is fitted into the keyway 32 of the weight 30, and the sliding cylinder 25, which has been lifted, is lowered. This completes the installation of the diamond wheel 34.

Thereafter, when the motor 10 is driven, the drive shaft 13 rotates, thereby causing the arm plate 15 to rotate. Therefore, the drive shaft 22 is rotated about the drive shaft 13, but since the planetary gear 24 fixed to the drive shaft 22 meshes with the sun gear 7, it rotates while revolving around the sun. As a result, the drive shaft 22 similarly rotates while revolving, and drives the weight 30 from the sliding tube 25 via the projection 29. Therefore, the diamond wheel 34 also rotates while revolving on the surface plate 36. At this time, the diamond wheel 34
The weight of the weight 30 is added to this, and together with the action of the lapping agent 37, polishing is carried out efficiently.

Next, as shown in Fig. 2, the lapping agent 37 during polishing is
Explain the movement of.

Figure 2 shows the diamond wheel 3 on the surface plate 36.
This shows the locus of one point on the outer circumference of 4. That is, point O is the center of the drive shaft 13 in FIG. 1, circle A is the locus of the center of the revolving drive shaft 22, and D ₁
indicates its diameter (orbital diameter). Circle B indicates the instantaneous outer circumference of the diamond wheel 34, and D ₂ is its diameter. The diameter _D1 is set to be slightly larger than the diameter _D2 . For example, D ₁ = 152
mmφ, D ₂ =150mmφ. And sun gear 7
The ratio of the number of teeth of the planetary gear 24 to the number of teeth of the planetary gear 24 is
When 4 rotates once, 360°/n (n=1, 2,...)
If, for example, as shown in Fig. 2, the planetary gear 24 is selected to revolve at 96 degrees for one rotation, the loci drawn during the first and second revolutions will shift sequentially, and the surface plate 36 The top can be scanned evenly. a→O→b→O→c shown by the solid line in Figure 2
The trajectory indicates that the diamond wheel 34 has rotated twice, and the two trajectories indicated by dotted lines are sequentially shifted trajectories.

Now, in the trajectory shown by the solid line, at point a, the magnitudes of the velocities of rotation and revolution are added, and at point O, they are subtracted. That is, the circumferential speed of the diamond wheel 34 is higher on the outer circumferential side of its movement locus, that is, at points a, b, and c, than on the center side, that is, near point O. As a result, the amount of the wrapping agent 37 that is moved from the peripheral side of the surface plate 36 toward the center side as the portion on the outer peripheral side of the movement locus on the forward side in the traveling direction of the diamond wheel 34 moves is as follows.
The amount of the wrapping agent 37 is larger than the amount of the wrapping agent 37 that is moved from the center side to the peripheral edge side of the surface plate 36 as the portion on the inner peripheral side of the movement trajectory on the rear side in the traveling direction of the diamond wheel 34 moves. 37 will accumulate near the central point O. Therefore, once the wrapping agent 3 is placed on the surface plate 36,
If 7 is supplied, the wrapping agent 37 will not scatter and will always work effectively.

FIG. 3 schematically shows how the lapping agent 37 accumulates around point O.

In the above embodiment, the diameter D ₁ of revolution is made larger than the diameter D ₂ of the diamond wheel 34, but theoretically D ₁ =D ₂ may be the same.

As explained in detail above, in this invention, a drive shaft is attached to a planetary gear that revolves while rotating, and a diamond wheel is also attached to this drive shaft, so the diamond wheel also revolves while rotating, so its movement There is a difference in the circumferential speed of the diamond wheel between the center and outer periphery of the trajectory, which is larger at the outer periphery than at the center, which causes the diamond wheel to change its trajectory forward in the forward direction of movement on the surface plate. The amount of lapping agent that is moved from the periphery to the center of the surface plate as the part on the outer periphery moves, and the amount of lapping agent that is moved from the periphery to the center of the surface plate as the part on the inner periphery of the diamond wheel moves on the rear side in the direction of travel. This amount is larger than the amount of wrapping agent that is moved from the center side of the surface plate to the peripheral side. As a result, the clinging agent accumulates in the center, which not only prevents the clinging agent from scattering and polluting the surrounding area as in the past, but also prevents the clinging agent from scattering and contaminating the surrounding area. There is no longer a need to supply
It is possible to eliminate the need for a wrapping agent supply device.
In addition, since the drive shaft that causes the planetary gear to rotate and revolve is mounted above the surface plate with its lower end facing the upper surface of the center of the surface plate, the center of the upper surface of the surface plate and the surrounding area In addition to being able to use the area effectively, since the surface plate is fixed, only one motor is required as a driving source, which eliminates the need for a lapping agent supply device, making the entire structure compact and inexpensive. can be manufactured. Furthermore, the one provided with a weight has the advantage that efficient polishing can be performed due to its action.

[Brief explanation of the drawing]

Fig. 1 is a partially cross-sectional front view showing an embodiment of this invention, and Fig. 2 is a diagram showing the locus of one point on the outer circumference of a diamond wheel to explain the polishing state according to this invention. , FIG. 3 is a diagram for explaining an example of the distribution of the wrapping agent. In the figure, 7 is a sun gear, 10 is a motor, 11 is a reducer, 13 is a drive shaft, 15 is an arm plate, 22 is a drive shaft, 24 is a planetary gear, 25 is a sliding tube, 26 is a long hole, and 27 is a pin , 28 is a spring, 29 is a projection, 30 is a weight, 31 is a hole, 32 is a keyway, 33
is a guide pin, 34 is a diamond wheel, 35
36 is a guide hole, 36 is a surface plate, and 37 is a wrapping agent.

Claims (1)

[Scope of utility model registration request] A surface plate is fixed on a base and a column is attached to the column, a support plate facing the surface plate is attached to the column, and a motor and a first drive rotated by the motor are attached to the support plate. The drive unit including the shaft is
The first drive shaft is attached so that it protrudes from the support plate in the direction toward the surface plate, and one end thereof faces the surface plate, and the second drive shaft is supported by the first drive shaft. A drive shaft is disposed, and the second drive shaft engages with a first gear fixed to surround the first drive shaft, and rotation of the first drive shaft causes the second drive shaft to rotate. A second gear is provided which is driven to revolve around the first drive shaft and rotate on its own axis, and at one end of the second drive shaft,
A weight having a guide pin is attached, and a diamond wheel having a guide hole that fits into the guide pin is attached so that the surface to be polished is brought into contact with the surface plate,
By making the circumferential speed at the outer circumferential side of the locus of one point on the diamond wheel greater than the circumferential speed at the center side, the wrapping agent is made to stay in the center part. A lap board for diamond wheels featuring the following.