JP5511496B2 - Powder forming press - Google Patents

Description

  The present invention relates to a powder molding press apparatus used for compacting.

  In general, as described in Non-Patent Document 1, for example, a powder molding press device fills a die with raw material powder in a state where a lower punch is inserted into a die, and further inserts an upper punch into the die. The raw material powder is compressed by an upper punch or a lower punch in the die, so that a compacted body in which the inner surface of the die and the end face shapes of the upper and lower punches are transferred is manufactured.

"Sintered part molding technology", Japan Powder Metallurgy Association, May 14, 2004, p. 9-11

  By the way, in this powder compaction press apparatus, until finding a condition that can produce a compact compact that can be accepted as a non-defective product (for example, compact compact that satisfies a desired density balance without defects such as cracks), It is necessary to carry out a number of trial hits for experimentally producing a green compact. For this reason, there is a problem that the time until the mass production of the green compact can be started becomes long and the production efficiency is poor. In addition, when compacting by using elastic force such as air pressure, hydraulic pressure, spring, etc., the movement of the upper and lower punches and dies during compression becomes particularly complicated, so it is necessary to find the conditions for manufacturing good products. The number of trial hits will be particularly large.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a powder molding press apparatus capable of improving the manufacturing efficiency of a green compact.

  In order to solve this problem, the powder molding press apparatus of the present invention includes a die in which a through hole is formed, and is movable relative to the die in the through direction of the through hole, and is inserted into the through hole. A lower punch that defines a filling portion for filling the raw material powder together with the through hole in a state of being formed, and an upper punch that is movable relative to the die and the lower punch in the penetrating direction. The raw material powder filled in the filling portion by relative movement of the die, the lower punch and the upper punch is molded into a green compact by pressing the raw material powder, A die, a position detecting means for detecting a relative position of the lower punch and the upper punch, and at least when the raw material powder is pressure-molded, based on the relative position output from the position detecting means, the die, Said Characterized in that it comprises a punch and a storage means for storing the relative movement data of the upper punch.

The pressure molding is not limited to the compression process in which the raw material powder is compressed by the relative movement of the die, the lower punch, and the upper punch, but after the compression process, the green compact is formed by the relative movement of the die, the lower punch, and the upper punch. The extraction process etc. which take out from a filling part may be included.
The relative movement data of the die, the lower punch, and the upper punch at the time of pressure molding indicates a history of relative movement of the die, the lower punch, and the upper punch in the compression process, the extraction process, and the like.

  According to this powder molding press apparatus, the relative position of the die, the lower punch, and the upper punch is detected by the position detection means, and the relative movement data of the die, the lower punch, and the upper punch is acquired, so that the die in the pressure molding It becomes possible to know in detail the relative positions and movements (for example, movement speed and acceleration) of the lower punch and the upper punch. For example, even when pressure molding is performed using elastic force such as air pressure, hydraulic pressure, spring, etc., it is possible to know in detail the complex movement of the die, lower punch and upper punch including the influence of this elastic force. it can.

Therefore, by comparing the produced green compact and the corresponding relative movement data, the relative movement of the die, the lower punch and the upper punch, the amount of raw material powder filled in the filling portion, etc. It is possible to easily and in detail analyze and analyze the influence of various parameters on the quality of the green compact (for example, presence or absence of defects such as cracks, density balance, etc.). As a result, the operator adjusts various parameters to find out the manufacturable conditions of a compact that can be accepted as a non-defective product (for example, those that have no defects such as cracks and satisfy the conditions such as the desired density balance). It can be done efficiently without relying on experience or feeling. That is, it is possible to reliably reduce the number of trial hits until mass production of the green compact is started.
Examples of adjustment of various parameters include adjustment of the amount of raw material powder, adjustment of driving force for moving the die, lower punch, and upper punch, adjustment of timing for changing the driving force, and the like. In addition, when pressure molding is performed using an elastic force such as air pressure, hydraulic pressure, or a spring, the adjustment of the elastic force is an example of adjustment of various parameters.

  And the said powder shaping press apparatus is the manufacturing conditions of the said compacting body previously memorize | stored in the said memory | storage means, One relative movement data at the time of press-molding the said raw material powder to one compacting body, If the one relative movement data is included in the manufacturing conditions, it is output that the one green compact is a non-defective product, and the one relative movement data deviates from the manufacturing conditions. If there is, it is preferable to include a discriminating means for outputting that the one green compact is a defective product.

  In addition, the manufacturing conditions are the manufacturing conditions of a green compact that is acceptable as a non-defective product, for example, relative movement data (non-defective product data) when the raw material powder is pressed into a green compact that is a non-defective product, A predetermined allowable range in which a predetermined upper limit value and lower limit value are provided for the non-defective product data can be given. In these cases, the fact that one relative movement data is included in the manufacturing condition means that it matches the non-defective product data or is located within the allowable range of the non-defective product data. Further, the fact that one relative movement data is out of the manufacturing condition means that it does not coincide with the non-defective product data or is located outside the allowable range of the good product data.

According to this powder molding press apparatus, since the quality of the green compact is determined based on the relative movement data indicating the detailed movements of the die, the lower punch, and the upper punch, the reliability of the quality determination can be improved. it can. Therefore, if this pass / fail judgment is applied at the time of mass production of compacted compacts, various inspections such as the presence or absence of defects such as cracks and density balance measurement on mass-produced compacts will be eliminated, or the frequency of various inspections will be reduced. It becomes possible to reduce. In addition, since the operation of distributing a large number of compacted compacts that have been mass-produced into non-defective / defective products can be performed based on the output from the determination means, this distribution operation can be performed easily and quickly. From the above, it becomes possible to further improve the production efficiency of the green compact.
In addition, although the distribution operation | work of the compacting body mentioned above may be performed artificially, based on the output from a discrimination | determination means, you may perform automatically by a predetermined distribution apparatus.

  According to the present invention, by providing the position detection means for detecting the relative position of the die, the lower punch and the upper punch, the number of trial hits until the start of mass production of the green compact can be reliably reduced, It becomes possible to improve the manufacturing efficiency of the green compact.

It is a schematic sectional drawing which shows the state before press-molding raw material powder in the powder molding press apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the computer which comprises the powder shaping press apparatus of FIG. It is a schematic sectional drawing which shows the compression process by the powder molding press apparatus of FIG. It is a schematic sectional drawing which shows the compression process by the powder molding press apparatus of FIG. It is a schematic sectional drawing which shows the compression process by the powder molding press apparatus of FIG. It is a schematic sectional drawing which shows the compression process by the powder molding press apparatus of FIG. It is a schematic sectional drawing which shows the extraction process by the powder molding press apparatus of FIG. It is a schematic sectional drawing which shows the operation | movement after the extraction process by the powder molding press apparatus of FIG. It is a graph which shows an example of the relative movement data obtained by passing through the process shown in FIGS.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a powder molding press apparatus 1 according to this embodiment compresses a raw material powder by a floating die method and molds it into a green compact, and includes a die 2, a lower punch 3, and an upper punch 4. It has.

  The die 2 is formed in a thick plate shape and is formed by forming a through hole 2C penetrating in the thickness direction (up and down direction of the paper surface), and is disposed on the upper surface 5a of the base plate 5 via the air damper 11. ing. In other words, the die 2 is arranged in a state of being floated on the base plate 5 by the pressure of the air damper 11. In the illustrated example, the die 2 is supported by only one air damper 11. However, in practice, a plurality of die 2 are maintained so that the penetrating direction of the through hole 2C and the upper surface 5a of the base plate 5 are kept orthogonal. It is supported by the air damper 11.

In this configuration, when an external force is applied to the die 2 in the thickness direction, the die 2 moves in the thickness direction relative to the base plate 5 so as to resist the pressure of the air damper 11. When the external force is released, the die 2 returns to the original position by the elastic force of the air damper 11. That is, the die 2 is provided so as to be movable in the vertical direction with respect to the base plate 5.
An opening wedge 13 corresponding to the sliding block 12 provided on the upper surface 5a of the base plate 5 and an abutting rod 14 for abutting with a lower first punch plate 23 described later protrude from the lower surface of the die 2. Is provided. The opening wedge 13 and the abutting rod 14 are positioned above the sliding block 12 and the lower first punch plate 23, respectively, in a state where no external force is applied to the die 2. The interval between the opening wedge 13 and the sliding block 12 is set shorter than the interval between the contact rod 14 and the lower first punch plate 23.

  At the lower end of the opening wedge 13, a tapered surface 13 b that is gradually inclined outward from the lower end side toward the upper end side is formed. For this reason, the initial position of the sliding block 12 is set below the lower first punch plate 23, but as the die 2 is moved downward, the opening wedge 13 is formed in the sliding block 12. By pressing the protrusion 12C, the sliding block 12 moves horizontally from the initial position to the side, and comes off from below the lower first punch plate 23 (see FIG. 7). The sliding block 12 is set to return to the initial position when the release wedge 13 is separated above the sliding block 12 when the die 2 is returned to the original position from this state. .

  Further, a plurality of long rods 16 penetrating the base plate 5 are provided on the lower surface of the die 2, and a suspension plate 17 is fixed to the tips of the plurality of rods 16. The suspension plate 17 is disposed at a distance from the lower surface 5 b of the base plate 5 at least in a state where no external force is applied to the die 2. Further, a lower ram 18 is inserted into the suspension plate 17 from below. Further, an engaging protrusion 18 </ b> C that can be brought into contact with the suspension plate 17 in the vertical direction is formed at the upper end of the lower ram 18.

The lower ram 18 is driven up and down in a predetermined section in a vertical direction by a mechanical, pneumatic or hydraulic driving device (not shown), and thereby in the thickness direction with respect to the suspension plate 17. It can be moved. As the mechanical drive device, for example, one using a crank mechanism, an eccentric mechanism, a toggle joint mechanism, a cam mechanism, or the like, that is, the lower ram 18 is moved up and down as the drive shaft of a motor or the like rotates once. The thing provided with the mechanism which reciprocates is mentioned.
As shown in FIG. 1, the initial position of the lower ram 18 is a position where the engagement protrusions 18 </ b> C are arranged above the suspension plate 17 with a space therebetween. It is possible to move to. Further, the lower ram 18 is movable further downward from the state in which the engaging projection 18 </ b> C is in contact with the upper surface of the suspension plate 17. Therefore, when the lower ram 18 is driven downward with the engaging projection 18C in contact with the upper surface of the suspension plate 17, the die 2 moves downward together with the lower ram 18 against the pressure of the air damper 11. Will move in the direction.

The lower punch 3 is movable relative to the die 2 in the penetration direction (vertical direction) of the through hole 2C so that the lower punch 3 is inserted into and removed from the lower hole side of the die 2. In the state where the lower punch 3 is inserted into the through hole 2C as in the illustrated example, the lower punch 3 closes the lower end opening of the through hole 2C, and the raw material powder P is filled with the through hole 2C and the lower punch 3. A filling portion A is defined.
The lower punch 3 is composed of a plurality of punches. Specifically, the lower punch 3 includes a substantially cylindrical lower first punch 21 and a substantially cylindrical lower second punch 22 inserted into the lower first punch 21. The lower second punch 22 is fixed to the base plate 5 so as to protrude upward from the upper surface 5 a of the base plate 5.

  On the other hand, the lower first punch 21 is fixed on the lower first punch plate 23 and is disposed on the upper surface 5 a of the base plate 5 via the air damper 24 as in the case of the die 2. In other words, the lower first punch 21 is arranged in a state of being floated on the base plate 5 by the pressure of the air damper 24. In the illustrated example, the lower first punch 21 and the lower first punch plate 23 are supported by only one air damper 24, but in actuality, the central axes of the lower first punch 21 and the lower second punch 22 Are supported by a plurality of air dampers 24.

The upper punch 4 is movable relative to the die 2 and the lower punch 3 in the penetrating direction of the through hole 2C so that the upper punch 4 is inserted into and extracted from the through hole 2C from the upper surface side of the die 2. When the lower portion of the upper punch 4 is inserted into the through hole 2C, the upper end opening of the through hole 2C is closed by the upper punch 4 (see FIGS. 3 to 6).
A piston portion 32 of the air cylinder 31 is mounted on the upper punch 4, and the cylinder portion 33 of the air cylinder 31 is disposed at the lower end of the upper ram 35 that slides up and down in the upper guide 34. . Further, the upper end of the upper ram 35 is connected to a crankshaft 37 via a link 36, and the crankshaft 37 is connected to a drive motor.

  An air supply pipe 39 is connected to the cylinder portion 33 of the air cylinder 31 to communicate the inside thereof with the air pressure adjustment unit 38. An electromagnetic valve 40 for switching communication / blocking with the unit 38 is provided. The air pressure adjustment unit 38 includes an air supply source for supplying air into the cylinder portion 33, a discharge portion for discharging the air in the cylinder portion 33, and the like. The pressure in the cylinder part 33 can be adjusted when is connected. In addition, the structure for adjusting the pressure in the cylinder part 33 is not restricted to the said structure, Arbitrary structures can be taken.

  In the above configuration, the piston portion 32 of the air cylinder 31 is movable in the vertical direction with respect to the cylinder portion 33 by increasing or decreasing the pressure in the cylinder portion 33. That is, the upper punch 4 provided on the lower side of the air cylinder 31 can be moved in the vertical direction by a pneumatic drive device. Further, when the crankshaft 37 rotates once by the drive motor M, the upper ram 35 reciprocates once in the vertical direction. That is, the upper punch 4 provided on the lower side of the upper ram 35 via the air cylinder 31 can be moved in the vertical direction also by a mechanical drive device using a crank mechanism.

  Further, the powder molding press apparatus 1 includes linear scales (position detecting means) 41, 42, 43 disposed between the base plate 5 and the die 2, the lower first punch plate 23, and the upper punch 4, respectively. Yes. The linear scales 41, 42, and 43 monitor and detect the vertical positions of the die 2, the lower first punch 21, and the upper punch 4 with reference to the position of the lower second punch 22 fixed to the base plate 5. Is. That is, in this configuration, the relative positions of the die 2, the lower first punch 21, the lower second punch 22, and the upper punch 4 can be detected by the plurality of linear scales 41, 42, 43.

As shown in FIGS. 1 and 2, the powder molding press apparatus 1 includes a memory (storage means) 51 including an HDD, a RAM, and a ROM, a control unit 52 including a CPU, a display unit 53 including a monitor, and the like. The computer 50 includes an input unit 54 such as a keyboard.
The memory 51 stores various programs and various data required for pressure molding. The input unit 54 inputs various data artificially.
The controller 52 performs various information processing based on various programs and various data stored in the memory 51 or various data output from the input unit 54. If it demonstrates concretely, the control part 52 will output the control signal required for pressure molding to the solenoid valve 40, the drive motor M, etc. based on the various programs and various data which were stored in the memory 51, for example. Further, the control unit 52, for example, based on the relative positions of the die 2, the lower first punch 21, the lower second punch 22, and the upper punch 4 output from the plurality of linear scales 41, 42, 43, Relative movement data (see FIG. 9) of the lower first punch 21, the lower second punch 22, and the upper punch 4 is created. Furthermore, the control unit 52 stores, for example, various data such as data input at the input unit 54 and the above-described relative movement data in the memory 51 or outputs the data to the display unit 53.

In the powder forming press apparatus 1 configured as described above, the raw material powder P is formed by pressure forming the raw material powder P filled in the filling portion A by the relative movement of the die 2, the lower punch 3 and the upper punch 4. It can be formed into a green compact. Hereinafter, this pressure forming method will be described with reference to FIGS.
In addition, the graph shown in FIG. 9 has shown the fluctuation | variation of the relative position of the up-down direction of the die | dye 2, the lower 1st punch 21, the lower 2nd punch 22, and the upper punch 4 in press molding. The horizontal axis of the graph indicates the angle of the crankshaft 37 relative to the point (0 degree) at which the crank portion of the crankshaft 37 is located at the zenith, and the vertical axis of the graph indicates the lower second punch 22. The vertical positions of the upper surface of the die 2 with respect to the upper surface, the upper surface of the lower first punch 21 and the lower surface of the upper punch 4 are shown. Further, the states (A) to (G) shown in the graph of FIG. 9 correspond to the states shown in FIGS. Further, as shown in FIG. 9, the crankshaft 37 continuously rotates without stopping until the crank portion moves from the zenith (0 degree) and returns to the zenith again.

At the time of pressure molding, first, with reference to the vertical position of the lower second punch 22, each part of the apparatus such as the die 2, the lower first punch 21, the upper punch 4, and the like are initially positioned as shown in FIG. (I)), and then the raw material powder P is filled into the filling portion A by a feeder (not shown) (filling step). In this step, the volume of the filling part A can be adjusted by changing the relative vertical position of the die 2 and the lower punch 3, and the amount of the raw material powder P filled in the filling part A can be adjusted. It is.
Next, the raw material powder P is compressed by the relative movement of the die 2, the lower punch 3, and the upper punch 4 (compression step). In this compression step, first, the upper ram 35 is driven downward by the drive motor M, so that the upper punch 4 is lowered and inserted into the through hole 2C as shown in FIG. To compress (first compression step). This first compression step corresponds to the transition from the state (A) to the state (B) in FIG. 9. In this transition, the die 2 and the lower first punch 21 are not moved in the vertical direction.

  Next, when the upper ram 35 is further driven downward and the upper punch 4 is further lowered as shown in FIG. 4, the lower first punch 21 is moved to the air damper along with the pressurization of the raw material powder P in the first compression step. The raw material powder P is further pressed and compressed between the die 2 and the lower second punch 22 against the pressure of 24 with the upper punch 4 (second compression step). This second compression process corresponds to the transition from the state (b) to the state (c) in FIG. 9, and in this transition, the die 2 does not move in the vertical direction. In the state after the second compression step, the sliding block 12 abuts on the lower surface of the lower first punch plate 23, and therefore further downward movement of the lower first punch 21 is restricted.

  Thereafter, when the upper ram 35 is further driven downward and the upper punch 4 is further lowered as shown in FIG. 5, the die 2 and the raw material powder P are brought together with the pressurization of the raw material powder P in the second compression step. Therefore, the die 2 is lowered together with the upper punch 4 against the pressure of the air damper 11. At this time, since the lower first punch 21 is restricted from moving downward by the sliding block 12, as shown in the transition from the state (c) to the state (d) in FIG. Don't move on. Therefore, at this time, the raw material powder P is further pressurized and compressed between the die 2 and the lower first punch 21 and the lower second punch 22 (third compression step). In the state after the third compression step (state (D) in FIGS. 5 and 9), the crank portion of the crankshaft 37 and the upper ram 35 are positioned at the lowest point (180 degrees).

Finally, as shown in FIG. 6, by holding the pressure on the raw material powder P for a predetermined time (pressure holding step), the raw material powder P is formed into a powder compact with a predetermined shape in the filling portion A, The compression process is complete.
The pressurizing and holding step corresponds to the transition from the state (d) to the state (e) in FIG. In this pressurizing and holding process, instead of the crank part of the crankshaft 37 and the upper ram 35 rising from the lowest point, the piston part 32 protrudes downward with respect to the upper ram 35 and the cylinder part 33, thereby The vertical position of the punch 4 is held. More specifically, in this step, based on the detection result of the linear scale 43 between the upper punch 4 and the base plate 5, the control unit 52 controls the operation of the electromagnetic valve 40 and the air pressure adjustment unit 38, and the piston unit. By adjusting the pressure in the cylinder part 33 so that 32 protrudes from the cylinder part 33, the vertical position of the upper punch 4 is maintained.

After the compression step, the green compact F is extracted from the die 2 (extraction step).
In this step, first, as shown in FIG. 7, the lower ram 18 is driven downward to bring the engaging projection 18C into contact with the suspension plate 17 and then the lower ram 18 is further moved downward. The die 2 is moved downward. As the die 2 moves downward, the sliding block 12 is moved horizontally from the initial position by the opening wedge 13, and the lower first punch 21 and the lower first punch plate 23 are moved downward by the sliding block 12. Release restrictions on moving to
Thereafter, the die 2 is further lowered to bring the contact rod 14 into contact with the lower first punch plate 23. In this state, the upper surfaces of the die 2 and the lower first punch 21 are on the same plane. When the die 2 is further lowered from this contact state, the lower first punch 21 is lowered integrally with the die 2, whereby the green compact F comes out of the die 2.

When the green compact F is extracted from the die 2 in this way, the vertical position of the upper punch 4 is held at the same position as in the pressure holding process described above. That is, in the extraction process, the green compact F is extracted from the die 2 while being sandwiched between the lower second punch 22 and the upper punch 4. The behavior of the die 2, the lower first punch 21, the lower second punch 22, and the upper punch 4 in this extraction step corresponds to the transition from the state (e) to the state (f) in FIG.
Finally, as shown in FIG. 8, by pressing the upper punch 4 upwardly with respect to the green compact F, the pressure molding for forming the raw material powder P into the green compact F is completed, and the green compact The molded body F can be taken out from the powder molding press apparatus 1. The upward separation of the upper punch 4 is caused by lowering the pressure in the cylinder portion 33 by the operation control of the electromagnetic valve 40 and the air pressure adjusting unit 38 in addition to the rise of the upper ram 35 by the drive motor M, and the piston portion 32. Is also raised with respect to the upper ram 35 and the cylinder part 33. The separation of the upper punch 4 corresponds to the transition from the state (f) to the state (g) in FIG.

Moreover, when the raw material powder P is pressure-molded as described above, the control unit 52 applies the die 2 and the lower first punch 21 to the lower second punch 22 output from the plurality of linear scales 41, 42, and 43. 9, relative movement data of the die 2, the lower first punch 21 and the upper punch 4 with respect to the lower second punch 22 is created as shown in FIG. 9, and the relative movement data is stored in the memory. 51 is stored.
In this embodiment, relative movement data is created by associating the relative positions of the die 2, the lower first punch 21 and the upper punch 4 with respect to the lower second punch 22 with the angle of the crankshaft 37. For example, it may be created in association with time.

In the powder molding press apparatus according to the present embodiment, the relative positions and movements of the die 2, the lower first punch 21, the lower second punch 22, and the upper punch 4 ( For example, it becomes possible to know in detail the movement speed and acceleration). In particular, in the powder molding press apparatus 1 of the present embodiment, the movements of the die 2, the lower first punch 21 and the upper punch 4 in pressure molding are affected by the air pressure (elastic force) by the air dampers 11 and 24 and the air cylinder 31. Although it may be received, it is possible to know in detail the complicated movement of the die 2, the lower first punch 21 and the upper punch 4 including the influence of the air pressure.
Therefore, the relative movement of the die 2, the lower first punch 21, the lower second punch 22, and the upper punch 4 by comparing the produced green compact F with the relative movement data corresponding thereto, Easy and detailed analysis and analysis of the influence of various parameters such as the amount of raw material powder P filled in the filling part A on the quality of the green compact F (for example, presence or absence of defects such as cracks, density balance, etc.) It becomes possible to do.

From the above, when carrying out a test shot to find out the manufacturing conditions of the green compact F acceptable as a non-defective product, the adjustment of the various parameters described above can be efficiently performed without relying on the experience and sense of the operator. It can be carried out. As a result, it is possible to reliably reduce the number of trial hits until mass production of the green compact F starts, and to improve the manufacturing efficiency of the green compact F.
In addition, as adjustment of the various parameters in this embodiment, for example, adjustment of the amount of the raw material powder P, adjustment of the driving force of the upper punch 4 by the drive motor M and the air cylinder 31, adjustment of the air pressure of the air dampers 11 and 24, for example. In addition, adjustment of the timing for changing the driving force of the upper punch 4 (for example, timing for changing the pressure in the cylinder portion 33 in the pressurizing and holding step or the extraction step) can be given. When adjusting these various parameters, for example, the operator may use the input unit 54 to change the contents of a program required for pressure molding stored in the memory 51.

Further, in this powder molding press apparatus 1, a data table in which the relative movement data obtained in the trial hitting described above is associated with various information such as the presence / absence of defects such as cracks and density balance of the green compact F. Is stored in the memory 51. That is, this data table includes various information such as the presence / absence of defects and density balance for each green compact F, and such various information can be input by operating the input unit 54 by an operator, for example. is there.
Furthermore, in this powder molding press apparatus 1, the manufacturing conditions of the green compact F acceptable as a non-defective product are determined based on the data table or the like by the operation of the input unit 54 by the operator or the program stored in the memory 51 in advance. It can be created and stored in the memory 51. In addition, as manufacturing conditions, for example, relative movement data (non-defective product data) corresponding to a green compact F that is a non-defective product, or a predetermined allowable range in which a predetermined upper limit value and lower limit value are provided for the non-defective product data Data.

Further, the memory 51 compares the above manufacturing conditions with one relative movement data when the raw material powder P is pressure-molded into one green compact F, and one relative movement data is the above-mentioned manufacturing conditions. When one of the green compacts is “good”, it outputs that the one green compact F is out of the above-mentioned manufacturing conditions. Stores a program that outputs “defective product”.
That is, in this powder molding press apparatus 1, the control unit 52 compares the above manufacturing conditions with one relative movement data when one green compact F is manufactured based on the above program. When the relative movement data is included in the manufacturing conditions described above, it is output that one green compact F is “good”, and when the one relative movement data is out of the manufacturing conditions described above. , It functions as a discriminating means for outputting to the display unit 53 or the like that one green compact F is “defective product”. Note that the fact that one piece of relative movement data is included in the manufacturing condition means, for example, that it matches the non-defective product data or is included in the allowable range of the good product data. Further, the fact that one relative movement data is out of the manufacturing condition means that it does not coincide with the non-defective product data or is located outside the allowable range of the good product data.

As described above, in the powder molding press device 1 of the present embodiment, the quality of the green compact F can be determined based on the relative movement data indicating the detailed movements of the die 2, the lower first punch 21 and the upper punch 4. Therefore, it is possible to improve the reliability of the quality determination. Therefore, if this pass / fail judgment is applied at the time of mass production of the green compact F, various inspections such as the presence or absence of defects such as cracks and density balance measurement on the mass produced green compact F are eliminated, or various inspections are performed. The frequency can be reduced. Moreover, since the operation | work which distributes the many compacting bodies F which were mass-produced to a good article and inferior goods can be performed based on the output from a determination means, this distribution operation can be performed easily and rapidly. From the above, it becomes possible to further improve the manufacturing efficiency of the green compact F.
In addition, although the distribution operation | work of the compacting body F mentioned above may be implemented artificially by displaying a quality determination on a display part, for example, outputting a quality determination directly to a predetermined distribution apparatus. This may be done automatically.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the mechanical drive device that drives the upper punch 4 is not limited to the one that uses the crank mechanism, but may use another mechanism such as an eccentric mechanism, a toggle joint mechanism, or a cam mechanism. In addition, the vertical movement of the upper punch 4 is not limited to being performed by both pneumatic and mechanical driving devices, but any one of mechanical, pneumatic, and hydraulic driving devices, It may be performed by an appropriate combination.

Furthermore, the number of steps of the lower punch 3 and the upper punch 4 is not limited to that of the above embodiment, and may be set to any number of steps. When the upper punch 4 is composed of a plurality of stages of punches, a linear scale similar to that of the above embodiment may be provided between each stage of the upper punch 4 and the base plate 5.
In addition, the powder molding press apparatus of the present invention is not limited to the floating die method as in the above-described embodiment, but can be applied to other double-pressing methods such as the widsloal method or the one-press molding method. Is possible.

DESCRIPTION OF SYMBOLS 1 Powder shaping press apparatus 2 Die 2C Through-hole 3 Lower punch 4 Upper punch 21 Lower first punch 22 Lower second punch 41, 42, 43 Linear scale (position detection means)
50 computer 51 memory (storage means)
52 Control part A Filling part F Powder compact P Raw material powder

Claims (2)

A die in which a through hole is formed, and a filling unit that is movable relative to the die in the through direction of the through hole and is filled with the raw material powder together with the through hole while being inserted into the through hole A lower punch that defines a die, and an upper punch that is movable relative to the die and the lower punch in the penetrating direction, and the filling is performed by relative movement of the die, the lower punch, and the upper punch. A powder molding press apparatus for molding the raw material powder into a green compact by pressing the raw material powder filled in a part,
Position detecting means for detecting a relative position of the die, the lower punch and the upper punch;
Storage means for storing relative movement data of the die, the lower punch, and the upper punch based on the relative position output from the position detecting means when at least pressing the raw material powder. A powder molding press device characterized by the above.   Compare the manufacturing condition of the green compact previously stored in the storage means with one relative movement data when the raw material powder is pressure-molded into one green compact, and the one relative movement When the data is included in the manufacturing conditions, it is output that the one green compact is a non-defective product, and when the one relative movement data is out of the manufacturing conditions, the one pressure 2. The powder molding press apparatus according to claim 1, further comprising a discriminating means for outputting that the powder molded body is a defective product.

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