JP4174866B2 - Powder rolling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder rolling machine that forms a plate by rolling a powder of metal, ceramics, resin, or the like.
[0002]
[Prior art]
Conventionally, it has been practiced to produce a powder rolled plate by rolling a powder of metal, ceramics or resin.
[0003]
FIG. 6 and FIG. 7 show an example, and a pair of rolling rolls 1 and 2 are provided in parallel in the transverse direction so as to maintain a required rolling interval 4 and approach the upper outer peripheral surface of the rolling rolls 1 and 2. The front and rear plates 3a, 3b extending vertically upward, and the left and right plates having narrow lower ends so as to enter the vicinity of the position where the rolling interval 4 is the smallest along the upper outer peripheral surface of the rolling rolls 1, 2. A box-shaped powder supply hopper 3 composed of 3c and 3d is provided. Reference numerals 5 and 6 denote shafts of the rolling rolls 1 and 2.
[0004]
In the above-described conventional powder rolling machine, when the opposing surfaces of the pair of rolling rolls 1 and 2 are rotated in opposite directions so that the opposing surfaces move downward, the powder in the powder supply hopper 3 naturally moves toward the rolling interval 4. The powder rolling plate 7 is manufactured by being dropped and fed to the rolling rolls 1 and 2. The powder rolling plate 7 thus manufactured is heated and sintered in a heating furnace or the like as necessary.
[0005]
[Problems to be solved by the invention]
However, the conventional powder rolling mill shown in FIGS. 6 and 7 has various problems as described below.
[0006]
When rolling the powder using a pair of rolling rolls 1 and 2 as in the powder rolling machine shown in FIGS. 6 and 7, an effective biting angle α (about approximately It is known that the angle of about 5 ° to about 20 ° is always substantially constant regardless of the roll diameter of the rolling rolls 1 and 2. At this time, the difference between the distance L between the points where the effective biting angle α intersects the outer peripheral surfaces of the rolling rolls 1 and 2 and the thickness dimension S of the powder rolled sheet 7, that is, the effective reduction amount LS is determined. Become.
[0007]
Therefore, in general, when the thickness dimension S and density of the powder rolling plate 7 to be manufactured are set, it is possible to cope by selecting the rolling interval 4 between the rolling rolls 1 and 2 and the diameter of the rolling rolls 1 and 2. is doing.
[0008]
From the above, when the powder rolling plate 7 is to be thinned, the rolling interval 4 is adjusted to be small, but simply reducing the rolling interval 4 increases the effective reduction amount L-S to increase the density. As a result, the rolling load increases, and eventually rolling becomes impossible.
[0009]
In addition, when the rolls 1 and 2 having a small diameter are used, the effective reduction amount L-S can be reduced. However, the rolls 1 and 2 are bent, and the powder rolling plate 7 having a uniform thickness in the width direction is obtained. It cannot be manufactured.
[0010]
Therefore, the conventional powder rolling machine cannot manufacture the thin powder rolled plate 7 with a desired density.
[0011]
The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a powder rolling machine capable of producing a thin powder rolled sheet with a desired density.
[0012]
[Means for Solving the Problems]
In the present invention, a pair of rolling rolls provided in parallel in the transverse direction so as to maintain a required rolling interval, and the upper end is supported so as to be foldable via a thin-walled portion or a bending deformation portion by a pin, and the lower end is one of the rollings. A weir plate that forms a powder supply interval with the upper outer peripheral surface of the roll, a powder supply device that supplies powder onto the outer peripheral surface of the rolling roll between the top of the one rolling roll and the weir plate, and the folding The present invention relates to a powder rolling machine comprising a vibrator that vibrates a weir plate below the bending deformation portion.
[0013]
In addition, a power source is connected between the shafts of a pair of rolling rolls, at least the rolled part due to the rolling interval is kept in a non-oxidizing atmosphere, the vibrator is equipped with a vibration regulator that adjusts the frequency and amplitude, It is equipped with an interval adjustment device that adjusts the position of the vibrator so that the lower end of the plate approaches and separates from the outer peripheral surface of the rolling roll, or the weir plate so that the lower end of the weir plate approaches and separates from the outer peripheral surface of the rolling roll An interval adjusting device that moves up and down may be provided, or a deposit removing device that cleans the outer peripheral surface of the rolling roll may be provided.
[0014]
According to the above-described powder rolling mill of the present invention, a pair of rolling rolls provided in parallel in the horizontal direction so as to maintain a required rolling interval, and the upper end can be bent via a thin wall portion or a bending deformation portion by a pin. A weir plate that is supported and forms a powder supply interval with the upper outer peripheral surface of one rolling roll, and supplies the powder onto the outer peripheral surface of the rolling roll between the top of the one rolling roll and the weir plate Since the powder supply device and the vibrator for vibrating the weir plate below the bending deformation portion are provided, the powder supplied onto the rolling roll is rolled by the rolling roll little by little through the powder supply interval of the weir plate. Will be supplied at intervals. Therefore, even if the roll diameter is not reduced, the effective reduction amount can be reduced and the thin plate can be rolled, and furthermore, the vibration of the dam plate is facilitated because the lower dam plate is vibrated by the vibrator. In this way, a small amount of powder can be stably supplied at the rolling interval of the rolling roll, and thus the thin plate can be stably rolled.
[0015]
In addition, when a power source is connected between the shafts of a pair of rolling rolls, the rolling rolls can be heated to perform hot rolling, and with an antioxidant device that keeps the rolling part in a non-oxidizing atmosphere, the powder is oxidized during rolling. If the vibration adjuster that adjusts the vibration frequency and amplitude of the vibrator can be prevented, the amount of powder supplied by the barrier plate can be adjusted stably and arbitrarily, and the lower end of the barrier plate is the outer peripheral surface of the rolling roll. When equipped with an interval adjusting device that approaches and separates from the roll, the amount of powder supplied to the rolling interval of the rolling rolls can be arbitrarily changed to adjust the effective reduction amount arbitrarily, so the powder density can be arbitrarily set A thin plate can be manufactured, and if a deposit removing device for cleaning the outer peripheral surface of the rolling roll is provided, a problem that the thin plate is damaged or broken due to foreign matter adhering to the rolling roll can be prevented.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0017]
1 and 2 show an example of a powder rolling machine of the present invention. In the powder rolling mill shown in FIGS. 1 and 2, a pair of rolling rolls 1 and 2 are provided in parallel in the horizontal direction so as to maintain a required rolling interval 4, and one rolling roll (the left rolling roll 1 in FIG. 1) is provided. ) And the upper end of the weir plate 9, which has a lower end approaching the outer peripheral surface between the rolling interval 4 and the powder supply interval 8, is fixed to the fixing member 24. The left and right rolling rolls 1 and 2 in FIG. 1 may be provided at the same height or may have different heights in the vertical direction. The barrier plate 9 may also be provided vertically or inclined at a required angle.
[0018]
Further, a vibrator 10 is provided that vibrates the barrier plate 9 in a direction perpendicular to the surface of the barrier plate 9. The vibrator 10 is connected to a vibration adjuster 19 that can adjust its frequency and amplitude.
[0019]
A powder supply device 11 such as a conveyor is provided between the top of the one rolling roll 1 and the weir plate 9 so that a fixed amount of powder can be supplied from above. The powder supply apparatus 11 can also employ various types other than the conveyor.
[0020]
Further, a power source 13 is connected to the rolling rolls 1 and 2 via slip rings 12 provided on the shafts 5 and 6 of the rolling rolls 1 and 2. By flowing an electric current, the compacted or sintered thin plate 14 can be formed by rolling while heating a powder (for example, metal) below the melting temperature as necessary. Either direct current or alternating current can be used as the power source 13.
[0021]
In the vicinity of the rolling interval 4 that becomes a rolling part when the thin plate 14 is rolled by the rolling rolls 1 and 2, an inert gas such as nitrogen gas is blown to prevent the powder from being oxidized. An anti-oxidation device 15 is provided to improve the adhesion. As the antioxidant 15, the reducing gas such as hydrogen can be sprayed instead of the apparatus that sprays the inert gas, or the entire rolls 1 and 2 and the powder supply device 11 can be sealed. (Not shown), and the sealed container may be connected to a vacuum generator to maintain a vacuum, or an inert gas atmosphere may be used.
[0022]
The dam plate 9 shown in FIGS. 1 and 2 is provided so that the lower end thereof is positioned close to the rolling interval 4 on the outer peripheral surface of the rolling roll 1.
[0023]
Furthermore, the dam plate 9 is configured to include a bending deformation portion 16 on the upper portion of the dam plate 9 in order to bend and deform by vibration of the vibrator 10 for stable supply of powder.
[0024]
The bending deformation part 16 in FIG. 1 shows the case where it is easy to bend by providing the thin wall part 17 which consists of the groove | channel extended in the axial direction of the rolling rolls 1 and 2 on the surface of the weir board 9 made into the thick board, FIG. 3 shows a case where the pin 18 is connected to a fixing member (in FIG. 3, the connecting member 20) so as to be bent so as to be easily bent.
[0025]
The barrier plate 9 can adjust a powder supply interval 8 formed between the lower end thereof and the outer peripheral surface of the rolling roll 1.
[0026]
In FIG. 1, a bolt portion 22 having an adjustment screw 21 is rotatably attached to a connecting member 20 attached to the vibrator 10 with a pin, and a nut 23 is fixed so that the adjustment screw 21 is screwed. The distance adjusting device 25 is configured by being attached to the member 24. In the interval adjusting device 25 in FIG. 1, when the bolt portion 22 is turned to screw the adjusting screw 21 into the nut 23, the lower end of the barrier plate 9 is separated from the outer peripheral surface of the rolling roll 1 to increase the powder supply interval 8. If the adjusting screw 21 is extracted from the nut 23, the lower end of the barrier plate 9 can be brought closer to the outer peripheral surface of the rolling roll 1 to reduce the powder supply interval 8.
[0027]
1 and 3 exemplify the case where the vibrator 10 is connected and arranged between the dam plate 9 and the fixing member 24, the vibrator 10 may be attached so as to be directly placed on the dam plate 9. Further, the weir plate 9 may be provided immediately above the rolling interval 4, and at this time, the powder is between one rolling roll and the weir plate 9 or between both rolling rolls 1 and 2 and the weir plate 9. You may make it supply to.
[0028]
Further, instead of the spacing adjusting device 25 provided in the vibrator 10 of FIG. 1, a spacing adjusting device 26 having the same configuration as the spacing adjusting device 25 in FIG. 3 is provided between the upper end of the barrier plate 9 and the fixing member 24. The case where it provided is shown. In this case as well, the powder supply interval 8 between the lower end of the barrier plate 9 and the outer peripheral surface of the rolling roll 1 can be adjusted by turning the bolt portion 22 in the same manner.
[0029]
In FIG. 1 to FIG. 3, reference numeral 27 denotes a pressing plate disposed in the vicinity of the upper portion of the rolling interval 4 on the end faces of the rolling rolls 1, 2. This prevents the powder from leaking and falling from the end face side of the rolling rolls 1 and 2.
[0030]
In addition, an adhering substance removing device 29 that removes adhering substances such as powder adhering to the outer peripheral surfaces of the rolling rolls 1 and 2 is provided at a required position (lower position) of the outer peripheral surfaces of the rolling rolls 1 and 2. Yes. 1 shows the case of the brush roll 29a, FIG. 4 shows the case where the deposit removing device 29 is an air nozzle 29b, and FIG. 5 shows that the deposit removing device 29 is a fishtail type. The case of the vacuum 29c is shown. Further, a heating furnace or the like for sintering the thin plate 14 may be provided on the downstream side of the rolling rolls 1 and 2.
[0031]
The operation of the apparatus shown in FIGS. 1 to 3 will be described.
[0032]
The rolling rolls 1 and 2 are rotated in opposite directions (arrow directions) so that the roll surface forming the rolling interval 4 of the rolling rolls 1 and 2 moves downward, and one of the rolling rolls is rotated by the powder supply device 11. The powder is supplied quantitatively between 1 and the weir plate 9.
[0033]
The powder supplied on the rolling roll 1 is supplied and rolled on the rolling interval 4 of the rolling rolls 1 and 2 through the powder supply interval 8 formed between the rolling roll 1 and the lower end of the barrier plate 9. The
[0034]
At this time, even if the powder supply interval 8 by the weir plate 9 is set small by adjusting the interval adjusting device 25 of FIG. 1 or the interval adjusting device 26 of FIG. The interval 4 can be supplied.
[0035]
Furthermore, when the weir plate 9 is vibrated at a predetermined frequency by the vibrator 10, a small amount of powder can be reliably supplied to the rolling interval 4, so that the thin plate 14 can be formed stably. At this time, the dam plate 9 is provided with a bending deformation portion 16 that forms a thin portion 17 as shown in FIG. 1 or has a connecting structure that can be bent at a pin 18 as shown in FIG. The dam plate 9 made of a thick plate can be easily vibrated. The frequency and amplitude of vibration of the weir plate 9 can be adjusted by the vibration adjuster 19 so that the powder is stably and reliably supplied through the powder supply interval 8.
[0036]
According to the above, a small amount of powder can be supplied to the rolling interval 4, and the level X of the powder supplied between the rolling rolls 1 and 2 is the narrowest position of the rolling interval 4 and the effective biting angle α. When the supply amount is adjusted to be within the height H with respect to the intersection with the outer peripheral surface of the rolling rolls 1 and 2, the effective reduction amount L-S can be arbitrarily adjusted.
[0037]
Therefore, by adjusting the powder level X on the rolling interval 4, it is possible to manufacture the thin plate 14 in which the powder density is arbitrarily changed.
[0038]
Therefore, for example, the thin plate 14 which can transmit light between the front and back surfaces of the plate can be manufactured by having a small thickness and a low density.
[0039]
Further, when rolling, if necessary, when the powder is heated by supplying a current between the rolling rolls 1 and 2 by the power source 13 or by preventing the oxidation by blowing an inert gas by the antioxidant 15, A thin plate 14 having excellent solidification strength can be manufactured.
[0040]
Furthermore, when the deposit removing device 29 is provided to clean the outer peripheral surfaces of the rolling rolls 1 and 2, the deposit 14 may cause a problem that a part of the thin plate 14 is damaged or the thin plate 14 is broken. Can be prevented.
[0041]
Note that the present invention is not limited to the above-described embodiments, and the mounting method and mounting position of the weir plate can be variously modified, and various modifications can be made without departing from the scope of the present invention. Of course.
[0042]
【The invention's effect】
According to the above-described powder rolling machine of the present invention, the upper end is supported so as to be bendable through a thin-walled portion or a bending deformed portion by a pin, and the lower end forms a powder supply interval between the upper outer peripheral surface of one rolling roll. A dam plate, a powder supply device that supplies powder onto the outer peripheral surface of the rolling roll between the top of the one rolling roll and the dam plate, and a vibrator that vibrates the dam plate below the bending deformation portion. Since it provided, the powder supplied on the rolling roll is supplied to the rolling interval of a rolling roll little by little through the powder supply interval of a weir plate. Therefore, even if the roll diameter is not reduced, the effective reduction amount can be reduced and the thin plate can be rolled, and further, the vibration of the dam plate can be caused by vibrating the lower dam plate from the bending deformation portion by the vibrator. It is easily performed and a small amount of powder can be stably supplied to the rolling interval of the rolling rolls, and thus there is an effect that the thin plate can be stably roll-formed.
[0043]
In addition, when a power source is connected between the shafts of a pair of rolling rolls, the rolling rolls can be heated to perform hot rolling, and with an antioxidant device that keeps the rolling part in a non-oxidizing atmosphere, the powder is oxidized during rolling. If the vibration adjuster that adjusts the vibration frequency and amplitude of the vibrator can be prevented, the amount of powder supplied by the barrier plate can be adjusted stably and arbitrarily, and the lower end of the barrier plate is the outer peripheral surface of the rolling roll. When equipped with an interval adjusting device that approaches and separates from the roll, the amount of powder supplied to the rolling interval of the rolling rolls can be arbitrarily changed to adjust the effective reduction amount arbitrarily, so the powder density can be arbitrarily set It is possible to produce a thin plate that has been changed into a thin plate, and when a deposit removing device that cleans the outer peripheral surface of the rolling roll is provided, it is possible to prevent the problem that the thin plate is damaged or broken due to foreign matter adhering to the rolling roll A.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an example of a powder rolling machine of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a schematic side view showing another example of the powder rolling mill of the present invention.
FIG. 4 is a perspective view showing another example of the deposit removing device.
FIG. 5 is a perspective view showing still another example of the deposit removing device.
FIG. 6 is a schematic side view showing an example of a conventional powder rolling machine.
7 is a plan view of FIG. 6. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Roll roll 4 Rolling interval 5, 6 axis | shaft 8 Powder supply interval 9 Dam plate 10 Vibrator thin plate 11 Powder supply apparatus 13 Power supply 14
DESCRIPTION OF SYMBOLS 15 Antioxidation apparatus 16 Bending deformation part 17 Thin part which consists of a groove | channel 18 Pin 19 Vibration controller 24 Fixing member 25 Space | interval adjustment apparatus 26 Space | interval adjustment apparatus 29 Adhesion removal apparatus

Claims (7)

  A pair of rolling rolls provided in parallel in the horizontal direction so as to maintain the required rolling interval, and the upper end is supported so as to be foldable through a thin wall portion or a bending deformation portion by a pin, and the lower end is the upper outer periphery of one of the rolling rolls From a weir plate that forms a powder supply interval with the surface, a powder supply device that supplies powder onto the outer peripheral surface of the rolling roll between the top of the one rolling roll and the weir plate, and the bending deformation portion A powder rolling machine comprising: a vibrator that vibrates a lower weir plate.   2. The powder rolling machine according to claim 1, wherein a power source is connected between the shafts of the pair of rolling rolls.   The powder rolling machine according to claim 1 or 2, further comprising an oxidation prevention device for holding at least a rolled portion at a rolling interval in a non-oxidizing atmosphere.   The powder rolling machine according to any one of claims 1 to 3, wherein the vibrator includes a vibration adjuster that adjusts a frequency and an amplitude.   The powder rolling according to any one of claims 1 to 4, further comprising an interval adjusting device that adjusts a position of the vibrator so that a lower end of the weir plate approaches and separates from an outer peripheral surface of the rolling roll. Machine.   The powder according to any one of claims 1 to 4, further comprising an interval adjusting device that moves the weir plate up and down so that the lower end of the weir plate approaches and separates from the outer peripheral surface of the rolling roll. Rolling mill.   The powder rolling machine according to any one of claims 1 to 6, further comprising a deposit removing device that cleans the outer peripheral surface of the rolling roll.

Images