JPS6187803A - Apparatus for producing grinding stone - Google Patents

Abstract

PURPOSE:To produce efficiently a grinding stone having uniform quality by executing automatically an operation for supplying a prescribed amt. of raw material powder for the grinding stone into a weighing cup and packing uniformly the powder into a metallic mold via a molding hopper. CONSTITUTION:A rod 22 of a cylinder unit 21 of a rotary lifting device 2 is rotated and the weighing cup 26 held to the top end of a rod 24 of a cylinder unit 23 is placed on an imposing plate 19 of an electronic balance 7. The rod 22 is slightly lowered and the prescribed amt. of the raw material powder for the grinding stone is supplied from a receiving tray 17 into the cup 26. The rod 22 is then slightly raised and is rotated 180 deg.. The 1st moving plate 50 of an advancing and retreating device 4 is advance to advance the 2nd moving plate 66 so that the molding hopper 75 attached to the front end of the 2nd moving plate 66 faces the packing part 35 of the metallic mold 3. The rod 24 is then rotated to upset the cup 26 and the raw material powder for the grinding stone is supplied via the molding hopper 75 to the packing part 35. The hopper 26 is retreated and advanced to level off the raw material powder for the grinding stone.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a manufacturing apparatus for compacting a long grindstone for honing, for example.

(Prior Art) As a method of manufacturing a grindstone for cutting, powder compacting has been known for a long time.

As shown in Figure 1O, the mold for this powder compaction is an upper punch (+00), a lower punch (lot), and a lower punch (lot).
metal powder or metal powder and diamond powder in the molded part (103) formed by the lower punch (tol) and the goo (102). Grinding wheel raw material powder ('
104), the upper punch (10G) is lowered, and the grindstone raw material powder (1o4) is pressed and formed between the upper and lower punches (+00) and (101).

(Problems to be Solved by the Invention) In order to obtain a grindstone with uniform strength and consistent cutting ability using the above-mentioned mold device, a constant amount of grindstone raw material powder (1
04) must be filled into the molding section (103) and compacted. Therefore, in the past, the grindstone raw material powder (104) was filled into the forming part (+03) with a squeegee rod (105)
) is compacted after smoothing the top surface.

However, even if a constant volume of the grinding wheel raw material powder (+04) is filled into the molding part (+03) by such means, the grinding wheel raw material powder (104) is non-uniform in weight and density, so that the cutting ability 1 strength etc. A uniform whetstone is hard to f++,
In addition, when the particle size of the grinding wheel raw material powder (100) is less than 10, there is a problem that it is necessary to increase the particle size by mixing a binder to improve the fluidity.

Therefore, it is conceivable to measure and fill a certain weight of grindstone raw material powder into the molding section (103), but this would be extremely inefficient due to the cumbersome needle and filling operations.

(Means for Solving the Problems) In order to solve the above problems, the present invention supplies a predetermined amount of grinding wheel raw material powder into a measuring cup using an automatic measuring device, and moves the measuring cup containing the grinding wheel raw material powder to a rotating lifting device. The grinding wheel material powder in the measuring cup is moved to the advance position, that is, the position of the mold filling hopper at the mold position, and the grindstone raw material powder in the measuring cup is uniformly filled into the molding part of the mold through the mold filling hopper. By retreating from the mold and compacting between the upper and lower bunches, the process from measuring the raw material powder for the grinding wheel to compacting is performed automatically, making it possible to manufacture the grindstone efficiently and produce grindstones of uniform quality. I made it possible to obtain.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a grindstone manufacturing apparatus according to the present invention. Is the automatic weighing device fi (1) installed, rotating up and down? Ti
! (2), mold (3) and advancing/retracting device! The main parts are constructed in (4).

Next, the structure of each structural part will be explained in detail.

First, as shown in the side view of FIG. 2, the automatic weighing device (1) has a support frame (6) fixed on a base (5), and an electronic counter N (7) on the upper surface of the support frame (6). ) is stored and a support plate (8) is erected from one end of the support frame (6).

A hopper (8) is attached to the upper part of this support plate (8). A grinding wheel raw material powder (10) made of metal powder or a mixture of metal powder and diamond powder is stored in the hopper (3), and a deceleration mechanism (I
) is provided with a motor (12), and this deceleration mechanism (
The shaft (13) of the shaft (11) faces into the hopper (8);
3) A propeller (14) is fixed to the lower end.

By driving the motor (12), the hopper (8)
The grindstone raw material powder (10) in the hopper (!3
) The grinding wheel raw material powder (1
0) falls downward.

On the other hand, a vibration device (16) is installed in the middle part of the support plate (8).
is attached, and this vibrating amat (1g) is attached with a receiving plate (17) located below the pipe (15). This receiver II (1?) is a concave part on the upper surface, and this concave part has an inclined surface that gradually descends toward the tip.
A notch (18) is formed at the tip of the recess.

As the plate (17) vibrates, the grindstone raw material powder (lO) that falls from the pipe (15) onto the top surface of the plate (17) gradually moves toward the tip of the plate (17). fall off the part. In the lower part t of this notch (18) is a JIL position II (1B) for weighing the electronic ceiling U (?).
is located.

Also, rotating elevator 2! (2) is automatic needle Hk device 21 (+)
The cylinder unit (21) is installed on a base (5) approximately midway between the mold (3) and the cylinder unit (21) whose axial direction is perpendicular to the support plate (20) erected on the base (5). ),
At the tip of the rod (22) of this cylinder unit (21) is a cylinder unit whose axial direction is in the horizontal direction.
), and these cylinder units (21) and (23
) are both rotatable around their axes.

A chucking device 21 (25) is provided at the tip of the rod (20) of the cylinder unit (23), and the measuring cup (2B) is held by this chucking device M (25). An operation piece (27) is attached to a part of the cylinder unit (23).
3) rotates within a horizontal plane at a predetermined angle, and when the cylinder unit (23) moves up and down by a predetermined amount, the operation piece (27) moves to the cylinder unit (21) or the rimmie attached to the support plate (20); A switch (28) is activated to start or stop a predetermined operation.

The weight of the measuring cup (26) is known in advance, and the bottom (29) has a large diameter so that it will not come off the chucking device 21 (25) when it is turned over. .

The mold (3) also has an upper punch (30) and a lower bunch (3).
1) and Gui (32), the upper punch (30) is fixed to the lifting ram (33), and the lower punch (31) is fixed to the base (
5) Fixed on the support stand (30)
2) is slidably fitted onto the lower punch (31), and the grindstone raw material powder (10
) is formed. In addition, a stepped through hole (3B) is formed in the vertical direction in the guide (32), and a cylinder unit fixed to the base [5] is installed in this through hole (3B).
At (37), fit the upper end of the vertically movable elevating body (3rd), and lower the elevating body (38) to reach the guide (32).
is configured to move downward while slidingly contacting the outer periphery of the lower punch (31). Further, a spring (39) is compressed between the lower surface of the goo (32) and the support base (34) to urge the goo (32) upward.

Furthermore, the structure of the advancing/retracting device (0 is shown in Fig. 3 and A-A in Fig. 3).
As shown in FIG. 4, which is a directional view, the support stand (34
) to the rear side (right side in the figure) of the frame (40), and the rear end of this frame (40) to the bracket (
41), and a rocking plate (
42) is pivotally mounted, and the rod of the cylinder unit (40) fixed to the frame (41) is connected to the connecting rod (43) provided on the lower surface of the swing plate (42). 44), the swing plate (42) swings up and down about the vk end.

In addition, (45) in the figure is a limit switch, and the rocking plate (
42) is activated when it swings downward and becomes approximately horizontal,
cylinder unit) (44) is stopped.

In addition, on the top surface of the m motion plate (42), there are brackets (48), (
48) is erected, and this bracket (4B), (4fl
) is fixed to the cylinder unit (47), and bearings (48), (48) are attached to the upper surface of the swing plate (42). Then, the guide rod (48) is inserted into the sliding grooves of the bearings (4B) and (48).
8) has a first moving plate (50) fixed thereto. A bracket (51) hanging downward is provided on the first moving plate (50), and the tip end of the rod (52) of the cylinder unit (47) is tied to this bracket (51). In addition, a 7 rung part (53) is fitted onto the cylinder unit (47), and the 7 rung part (53) is fitted onto the upper surface of the f!S1 moving plate (50).
The limit switch (53) is activated by contacting the limit switch (53).
4) and (55) are provided spaced apart in the front-rear direction, and stoppers (5B) and (57) are provided behind the front limit switch (50) and the rear limit switch (55), respectively.
) has been established. Therefore, cylinder unit) (4?)
By activating the first moving plate (50), the first moving plate (50) moves forward and backward.

In the state shown in FIG. 3, the first moving plate (50) is at the forward limit position, and in this state, the limit switch (55) is set at 7.
It is in contact with the rung part (53), and the cylinder 22f)
(4?) has stopped its operation. From this state, the cylinder unit (47) is operated and the rod (52) is activated.
) is moved rearward to move the first moving plate (50) rearward.

Further, a pair of brackets (, 58), (58) are provided upright on the upper surface of the first movable plate (50) and spaced apart in the front-rear direction.

These brackets) (58), (58) l! A guide rod (59) is installed on It, and the first moving plate (50
) A bearing (60) is fixedly installed in the center of the upper surface of the bearing (60).
A small gear (82) and a large gear (63) are fitted to the shaft (8]) inserted into the shaft (8]), the large gear (B3) is used as a deceleration umbrella wheel, and the large gear (63) is connected to the 18th gear. A driving gear (85) of a motor (80) fixed to the moving plate (50) is engaged with the moving plate (50).

Further, a tJ2 second moving plate B) is slidably attached to the guide rod (59) via bearings (11?) and '(117), and a part of this second moving plate (88) The 0m rack (8th) and the second moving plate (66) are installed so that the rack (88) can be moved by a predetermined amount in the front and back direction.
), a linear bearing (88) is interposed between them, a gap is provided between the front and rear end surfaces of the rack (8B) and the second moving plate (B8), and a limit switch (70),
(71), these limit switches (70),
(71) and the end face of the tick (88).
2), (72) are equipped with IIA.

A vibrating device (73) is attached to the front end of the second moving plate (8B), and a mold filling hopper (75) is held by a finger (74) projecting forward from the vibrating device t (73). This mold filling hopper (75) has a funnel shape.

The lower part has a rectangular cylindrical shape, and the lower end thereof is a bifurcated part (78).

The second movable plate (66) moves back and forth independently of the first movable plate (50), and when the motor (64) is driven from the state shown in FIG. 3, the drive gear (85).

The small gear (62) rotates via the large gear (63), and the rack (68) that meshes with the small gear (62) moves to the right in the figure. Then the rack (68) and the second moving plate (8B)
Since the spring (72) is interposed between the rack (68) and the limit switch (71), the entire second moving plate (86) moves backward (to the right in the figure) without the rack (68) and limit switch (71) coming into contact with each other. , and finally the rear bearing (8) of the second moving plate (66).
7) comes into contact with a rear stopper (57) provided on the upper surface of the first movable plate (50), and the retreat of the second movable plate (66) is restricted. Then, since the motor (60) continues to drive,
The rack (68) abuts the limit switch (71) while applying linear pressure to the spring (72). Due to this contact, the motor (84) rotates in the opposite direction, the rack (68) starts moving forward (to the left in the figure), and in the same manner as described above, the second moving plate (68)
6) also moves forward, and eventually the front bearing (87) of the second moving plate (6B) comes into contact with the front stopper (56) provided on the top surface of the first moving plate (50), and the second Moving board (66)
Further, only the rack (68) moves forward and comes into contact with the limit switch (70) in front, and the motor (68) moves forward.
4) is stopped. In this way, the second moving plate (6B
) reciprocates back and forth, the lower end bifurcated portion (7
B) reciprocates within the filling part (35) of the mold (3). Therefore, the reciprocating stroke of the second movable plate (6B) is set to be approximately equal to the length of the filling part (35) in the front-rear direction.

A method for compacting a grindstone using the grindstone manufacturing apparatus having the above-described structure will be explained with reference to FIGS. 5 to 9.

First, as shown in FIG. 5, rotate the rod (22) of the cylinder unit (21) of the rotary lifting device (2).

Make sure that the rod (24) of the cylinder unit/) (23) faces the direction of the automatic metering device Zi (1), and
Place the measuring cup (26) held by the chucking device W1 (25) at the tip onto the @M board (19) of the electronic balance (7). When the measuring cup (2B) is placed on the mounting plate (18) of the electronic balance (7), the cylinder unit/
(21) + 7) The rod (22) goes down slightly and the measuring cup (2B) is held by the chucking device (25).
).

By doing this, the ff1ffi displayed by the electronic balance (7) is only the measuring cup (26) and the grindstone raw material powder supplied into this measuring cup (26), and the measuring cup (2θ) is By subtracting the weight, you can get an accurate measurement.

When the desired amount of the grinding wheel raw material powder (10) is supplied into the measuring cup (26), the vibration device (Il
l) Stop the drive of (see Figure 2) and place the receiver on the plate (17).
The grindstone raw material powder (lO) is stopped from falling from the notch (18) into the measuring cup (26).

On the other hand, the automatic metering device M(1) is supplying the grindstone raw material powder (10) into the measuring cup (26), and the advancing/retracting device N(4) is in the standby position.

In other words, the movement of the cylinder unit) (4G, ) moves forward and backward 2! (The entire front of 0 is rising; at this time, the first moving plate (50) is in the rear position, the second moving plate (e6) is in the front position, and the molding hopper (75) is in the filling part (35).
) in the rear-superior position.

After this, the cylinder unit (21
) to slightly raise the cylinder unit (23), the chucking device W (25) holds the measuring cup (26), and in this state, the loft (22) of the cylinder unit (21) is adjusted to 180°. Rotate.

Then, in parallel with the above operation, the rod of the cylinder unit (40) of the advancing/retracting M (4) is retracted, and the a retracting/retracting 22 (
4) Place the entire unit in a horizontal position, and the cylinder unit) (47
) (see figure m3) to move the first moving plate (50) forward. At this time, the second moving plate (66) also moves forward together with the first moving plate (50), and the mold filling hopper (75) attached to the front end of the i2 moving plate (66) moves into the filling part of the mold (3). (35), in particular, the front surface of the lower bifurcated portion (76) of the mold filling hopper (75) is in close contact with the front end surface of the filling portion (35).

With this operation, the total ψ car 2 (26) will be exposed above the mold filling hopper (75), and from this state, the rod (23) of the cylinder 22 (23) of the rotary lifting device (2) will be
20 is rotated, the measuring cup (2B) is inverted, and the grindstone raw material powder (10) in the measuring cup (26) is dropped into the mold hopper (75). This state is shown in FIG.

Thereafter, as shown in FIG. 8, the second moving plate (66) is moved backward to move the mold filling hopper (75) backwards, and the filling section (
35) is filled with grindstone raw material powder (10). Here, in synchronization with the retreat of the mold filling hopper (75), the cylinder unit always places the measuring cup (26) above the mold filling hopper (75).
so that the grindstone raw material powder (10) in the measuring cup (28) does not fall out of the mold hopper (75).

And the filling part (35) by the mold filling hopper (75)
The filling of the grindstone raw material powder (10) into the grindstone is as shown in the wSs diagram.

That is, at the initial stage of filling, as shown in FIG.
The grindstone raw material powder (10) is inserted into the filling part (35) so as to be in contact with the front end of the molding hopper (75), and the grindstone raw material powder (10) supplied into the molding hopper (75) is concentrated and deposited at the front part of the filling part (35). do.

Next, the mold filling hopper (75) is moved by the vibration device (73).
) is moved backward while vibrating. Then, as mentioned above, the forked v & (7B) of the mold filling hopper (75) has a tongue-like part at the front that is longer than a tongue-like part at the rear, and a notch is formed between the tongues. In order to level the grindstone raw material powder (10) by scraping it backward, the grindstone raw material powder (lO) is evenly filled into the filling part (35). In addition, the lower part of the mold filling hopper (75) is shaped like a rectangular cylinder, and its width is approximately equal to the width of the filling part (35), so that the grindstone raw material powder (10) is poured into the filling part (35) during filling. <<, and as mentioned above, the second moving plate (6B)
In order to make a forward movement following the retreat, the surface of the grinding wheel raw material powder (!0) that has been filled is re-injected into the mold hopper (7).
5) To level the bottom edge, 12! It is possible to achieve uniformity.

As described above, the grinding wheel raw material powder (lO
) is filled, compaction is performed. This compaction is carried out in the order of steps shown in FIGS. 9(A) to 9(D).

That is, once the filling part (35) is filled with the grindstone raw material powder (10), the cylinder unit (40) is operated to raise the charging mechanism (75), and the cylinder unit (47) is activated.
) to move the first moving plate (5o) backward,
The mold filling hopper (75) is moved to a position where it does not interfere with the upper punch (3o). Incidentally, in parallel with the above operation, the one-rotation lifting device (2) performs the same function as described above, and supplies the grindstone raw material powder (10) into the measuring cup (26) for the next filling. FIG. 9(A) shows a state in which the mold filling hopper (75) is retreated from the filling part (35) and the upper punch (30) is positioned above the filling part (35). ) is lowered to allow the upper punch (30) to enter the filling part (35), and the upper and lower punches (30),
(31) As shown in FIG. 9(B), the grindstone raw material powder (10) was
/ Crn'' pressure.

After this, the pressure is reduced to about I ton/C, the formed grindstone is held between the upper and lower punches (30) and (31), and while this state is maintained, the cylinder knife/tower is lowered. (37) Activate (see fiS1 diagram),
Lower the elevating body (38) and lower punch (32) the guide (32).
31) Pull it down while sliding it into contact with the outer periphery. Then, Figure 9 (
As shown in G), the shaped whetstone (W) appears relatively above the goo (32) while being held by the upper and lower punches (30) and (31). Therefore, Fig. 9 (D)
Raise the upper punch (30) as shown in
Make it free and pay it out.

Conventionally, when the goo (32) is pulled down, the upper punch (30) has already finished applying pressure and has moved upward, so when the goo (32) is pulled down, the grindstone (W) is It is not held in between, so Gui (32
) may be damaged due to the pulling force of the upper punch (30), and this disadvantage was particularly noticeable when forming a long grindstone such as a Ho-Kong grindstone. By using two forks and holding the formed grindstone by the upper punch (30), it will not be damaged.

(Effects of the Invention) As explained above, according to the present invention, the weight of the grinding wheel raw material powder is accurately measured using an automatic weighing device and then filled into the filling part of the mold, which eliminates the troublesome process of increasing grain size. It is possible to obtain a high-quality whetstone with excellent one-dimensional accuracy and no variation in density and cutting ability without going through the process.

In addition, since everything from measuring the raw material powder for the grinding wheel to filling it into the mold and even compacting the powder is done automatically, the grindstone can be manufactured extremely efficiently and has many other effects.

[Brief explanation of drawings]

Fig. 1 is an overall front view of a grindstone manufacturing apparatus according to the present invention, Fig.
The figure is a side view of the automatic weighing device, Figure 3 is an enlarged front view of the advance/retreat device, Figure 4 is a view seen from the ^-A line direction of Figure 3, and Figure 5 is a side view of the automatic weighing device.
Figures 7 to 7 are front views similar to Figure 1 explaining the operation of the grindstone manufacturing device, Figures 8 (^) and (B) are cross-sectional views explaining the filling process into the mold, and Figure 9 ( ^) to (D) are cross-sectional views showing the powder compacting process, and FIG. 10 is a cross-sectional view showing the conventional filling method. In one drawing, (1) is an automatic weighing device, (2) is a rotary lifting device, (3) is a mold, (4) is an advancing/retracting device, (5) is a base,
(7) is an electronic balance, (9) is a storage hopper for grinding wheel raw material powder, (1o) is a grinding wheel raw material powder, (17) is a tray, (1
3) is a storage board, (21), (23), (37), (40
), (4?) is the cylinder unit, (2 [1) is the total cup, (30) is the upper punch, (31) is the lower punch, (3
2) is the die, (35) is the filling part, (38) is the elevating body,
(42) is a rocking plate, (50) is a first moving plate, (BB) is a second moving plate, and (75) is a mold filling hopper. Patent applicant Honda Motor Co., Ltd. Agent Patent attorney 2 1) Production department Patent attorney Kuni Ohashi Production volume Patent attorney Yu Koyama Figure 9 (A) (B) and Figure 9 (C) (@)ノ・

Claims (1)

[Claims] In a grindstone manufacturing device that fills a mold with grindstone raw material powder and compacts it, this manufacturing device includes an automatic measuring device that measures and supplies a predetermined amount of grindstone raw material powder into a measuring cup, and a grindstone raw material powder that is an advancing/retracting device that advances the mold filling hopper to the mold when feeding the powder into the mold and retracts the mold filling hopper from the mold during compaction; and the automatic measuring device and the mold filling hopper in the forward position. 1. A grindstone manufacturing device comprising a rotary lifting device having a rotating mechanism and a lifting mechanism for moving a measuring cup between the two.