JPH08206891A - Electrical powder compacting machine - Google Patents

Electrical powder compacting machine

Info

Publication number
JPH08206891A
JPH08206891A JP28640495A JP28640495A JPH08206891A JP H08206891 A JPH08206891 A JP H08206891A JP 28640495 A JP28640495 A JP 28640495A JP 28640495 A JP28640495 A JP 28640495A JP H08206891 A JPH08206891 A JP H08206891A
Authority
JP
Japan
Prior art keywords
punch
die
driving
servomotor
ball screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP28640495A
Other languages
Japanese (ja)
Other versions
JP2657911B2 (en
Inventor
Takeo Nakagawa
威雄 中川
Hideaki Tsuru
英明 鶴
Nariaki Koyama
成昭 小山
Takayuki Taira
尊之 平
Zenji Inaba
善治 稲葉
Hideo Naito
英夫 内藤
Kikuo Watanabe
菊夫 渡辺
Masaki Muranaka
正樹 村中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Corp filed Critical Fanuc Corp
Priority to JP28640495A priority Critical patent/JP2657911B2/en
Publication of JPH08206891A publication Critical patent/JPH08206891A/en
Application granted granted Critical
Publication of JP2657911B2 publication Critical patent/JP2657911B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
    • B30B1/186—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C2043/3272—Component parts, details or accessories; Auxiliary operations driving means
    • B29C2043/3283—Component parts, details or accessories; Auxiliary operations driving means for moving moulds or mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
    • B29C2043/3618—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices plurality of counteracting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5808—Measuring, controlling or regulating pressure or compressing force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/20—Opening, closing or clamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To obtain a powder compacting machine, in which the compressive force of a punch can accurately and freely be controlled and the various adjustments at the time of exchanging the punch or a die are simply executed and the width size and the vertical size are compact. CONSTITUTION: The upper punch 7 and the lower punch 9 are driven by the direct pressing with ball screws 6, 10 linkage-connected with servo-motors 12, 18. The axial line (s) of ball screws 6, 10 and the axial line of output axes of the servo motors 12, 18 are parallel to each other and the body side of the servo motor is arranged at the punch side. A controller for the servo motor controls the compressive driving of the servo motor at this time based on the compressive force between the die and the punch until the output value of a sensor for detecting the compressive force of the punch becomes the compressive force corresponding to the set compressive force.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明はダイによる押し型
空間に成形材料である粉体を充填し、これをパンチによ
り所定の形状に圧縮成形して機械部品などを得る粉末成
形機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder molding machine for filling a molding material powder into a press space formed by a die and compressing the powder into a predetermined shape by a punch to obtain machine parts and the like.

【０００２】[0002]

【従来の技術】成形部にダイ（固定金型）とパンチ（可
動金型）を備えた粉末成形機ではパンチの圧縮力が成形
品における圧粉の状態（密度、密度の均一性）に大きな
影響があり、定量の原料粉体を供給する成形方法では製
品の寸法が不揃いになり、また、所定寸法となるまで随
時原料粉体を供給する成形方法の場合は、製品に重量差
が生じてしまう。2. Description of the Related Art In a powder molding machine provided with a die (fixed mold) and a punch (movable mold) in a molding section, the compression force of the punch is large in the state of the compact (density, uniformity of density) in the molded product. There is an effect, the dimensions of the product are not uniform in the molding method that supplies a fixed amount of raw material powder, and in the case of the molding method that supplies the raw material powder as needed until it reaches the predetermined size, a difference in weight occurs in the product. I will.

【０００３】しかし、従来の粉末成形機ではパンチの駆
動を一定の作動を繰返すだけの単純な油圧機構や単なる
電動モーターによる駆動機構で行っているため、気温や
装置自体の温度、あるいはリンク機構の摩耗などの影響
により設定した圧縮力を常時一定に維持して成形するの
は困難である。However, in a conventional powder molding machine, the driving of the punch is performed by a simple hydraulic mechanism that simply repeats a certain operation or a driving mechanism using a simple electric motor. It is difficult to keep the set compression force constant at all times due to the effects of wear and the like to perform molding.

【０００４】また、パンチのストロークや圧縮力を調整
できるようにするには複雑な機構を要する上その調整が
煩雜で、粉体や形状の変更など成形条件の変化に即応で
きない面がある。Also, in order to be able to adjust the stroke and compression force of the punch, a complicated mechanism is required and the adjustment is complicated, and there is the aspect that it cannot respond immediately to changes in the molding conditions such as changes in powder or shape.

【０００５】この状況を少しでも緩和するためにそれぞ
れの成形条件に合せダイ側を調整できるようにしたダイ
セッターを多数準備し、交換して使用する場合がある
が、ダイセッター自体、カムやエアシリンダなどの補助
駆動手段を供えた複雑な構成のもので高価である。ま
た、これによってもパンチの圧縮力を緻密に制御するこ
とは困難であった。In order to alleviate this situation as much as possible, there are cases in which a large number of die setters whose die side can be adjusted according to the respective molding conditions are prepared and used in exchange. It has a complicated structure provided with auxiliary driving means such as a cylinder and is expensive. Also, it has been difficult to precisely control the compression force of the punch.

【０００６】[0006]

【発明が解決しようとする課題】この発明は、パンチの
圧縮力を正確、かつ、自由に制御できるようにし、ま
た、パンチやダイを交換した際の種々な調整が簡単であ
ると共に、幅寸法および上下寸法共にコンパクトな粉末
成形機の提供を課題とする。SUMMARY OF THE INVENTION The present invention makes it possible to control the compression force of a punch accurately and freely, to make various adjustments when a punch or a die is exchanged, and to make it easy to change the width of the punch or die. It is another object of the present invention to provide a compact powder molding machine having both upper and lower dimensions.

【０００７】[0007]

【課題を解決するための手段】粉末成形機において成形
部をダイとパンチを備えたものとし、パンチの駆動機構
をボールスクリューの直圧でパンチを駆動する機構とす
る。パンチを駆動する機構は、サーボモータに連動連結
される。ボールスクリューとサーボモータは、成形機の
フレームに対してボールスクリューの軸線とサーボモー
タの出力軸の軸線とを平行に、かつ、サーボモータの本
体側がパンチ側となるように配置される。パンチの圧縮
力を検出するセンサーと制御手段が設けられる。制御手
段は、パンチの圧縮力を検出するセンサーの出力値が設
定した圧縮力に相当するものとなるまでサーボモータの
その回の圧縮駆動をダイとパンチ間の圧縮力に基づいて
制御する。In a powder molding machine, a molding section is provided with a die and a punch, and a driving mechanism of the punch is a mechanism for driving the punch by direct pressure of a ball screw. The mechanism for driving the punch is linked to the servomotor. The ball screw and the servomotor are arranged so that the axis of the ball screw and the axis of the output shaft of the servomotor are parallel to the frame of the molding machine, and the main body of the servomotor is on the punch side. A sensor for detecting the compression force of the punch and control means are provided. The control means controls the current compression drive of the servomotor based on the compression force between the die and the punch until the output value of the sensor for detecting the compression force of the punch becomes equivalent to the set compression force.

【０００８】作用 制御手段はパンチの圧縮力に関する設定値とセンサーか
らの圧縮力検出値に基づいてサーボモータを駆動し、サ
ーボモータは回転運動を直線運動に変換する機構を介し
てパンチを駆動する。The control means drives a servomotor based on a set value relating to the compression force of the punch and a detection value of the compression force from the sensor, and the servomotor drives the punch via a mechanism for converting a rotary motion into a linear motion. .

【０００９】[0009]

【発明の実施の形態】第１図において粉末成形機１は上
段壁２、中段壁３及び下段壁４を備えたフレーム５を有
し、これら壁を竪方向に貫通する垂直な軸線ｓに沿っ
て、上方から下方へ順次、上パンチ駆動用ボールスクリ
ュー６、上パンチ７、ダイ８、下パンチ９、下パンチ駆
動用ボールスクリュー１０が配置されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a powder molding machine 1 has a frame 5 having an upper step wall 2, a middle step wall 3 and a lower step wall 4, and extends along a vertical axis s penetrating these walls in the vertical direction. The ball screw 6 for driving the upper punch, the upper punch 7, the die 8, the lower punch 9, and the ball screw 10 for driving the lower punch are arranged in this order from top to bottom.

【００１０】上段壁２にはボールナット１１が回転自在
に軸架されると共に上パンチ駆動用のサーボモータ１２
が出力軸の軸線をボールスクリュー６の軸線（Ｓ）と平
行に、かつ、サーボモータ１２の本体側が上パンチ７側
となるように取り付けられており、これらはボールナッ
ト１１に固定したギア１３と前記サーボモータ１２の出
力軸に固定されたギア１４間にタイミングベルト１５が
掛けまわされて連動連結されている。上パンチ駆動用ボ
ールスクリュー６は前記のボールナット１１に螺合され
ると共に下端に上パンチ７をボールスクリュー６の押圧
力が直接作用（直圧）するように、かつ、交換可能に固
定している。A ball nut 11 is rotatably mounted on the upper step wall 2 and a servo motor 12 for driving an upper punch.
Are mounted so that the axis of the output shaft is parallel to the axis (S) of the ball screw 6 and the main body side of the servomotor 12 is on the upper punch 7 side. A timing belt 15 is wrapped around a gear 14 fixed to an output shaft of the servo motor 12, and is linked and connected. The ball screw 6 for driving the upper punch is screwed to the ball nut 11 and the lower punch 7 is fixed to the lower end so that the pressing force of the ball screw 6 directly acts (direct pressure) and is replaceable. I have.

【００１１】下段壁４には前記上段壁２の場合と同様
に、ボールナット１６が回転自在に軸架され、これに下
パンチ駆動用ボールスクリュー１０が螺合されている。
前記ボールスクリュー１０の上端には下パンチ９が交換
可能に固定されている。そして、ボールナット１６には
ギア１７が固定され、やはり下段壁４に取付けられた下
パンチ駆動用のサーボモータ１８の出力軸におけるギア
１９とタイミングベルト２０で連動連結されている。サ
ーボモータ１８の出力軸と下パンチ駆動用のボールスク
リュー１０の軸線（Ｓ）とは平行に、かつ、サーボモー
タ１８の本体側が下パンチ９側となるようにして配置さ
れている。As in the case of the upper wall 2, a ball nut 16 is rotatably mounted on the lower wall 4 and a lower punch driving ball screw 10 is screwed onto the ball nut 16.
A lower punch 9 is exchangeably fixed to the upper end of the ball screw 10. A gear 17 is fixed to the ball nut 16, and is linked to a gear 19 on an output shaft of a servo motor 18 for driving a lower punch, which is also attached to the lower step wall 4, via a timing belt 20. The output shaft of the servomotor 18 and the axis (S) of the ball screw 10 for driving the lower punch are arranged in parallel, and the main body side of the servomotor 18 is on the lower punch 9 side.

【００１２】前記において、上下のパンチ駆動用ボール
スクリュー６，１０とこれがそれぞれ螺合したボールナ
ット１１，１６との一対はそれぞれが回転運動を直線運
動に変換する機構であり、サーボモータ１２，１８によ
りパンチを駆動するための機構である。In the above, a pair of upper and lower punch driving ball screws 6 and 10 and ball nuts 11 and 16 respectively screwed with them are mechanisms for converting rotary motion into linear motion, respectively. Is a mechanism for driving the punch by

【００１３】中段壁３には上下に貫通した孔状のダイ装
着部２１が構成され、ここにダイ８が装着されて固定部
材２２で交換可能に固定されている。ダイ８はやはり上
下に貫通した孔状の押し型空間２３を備え、上下のパン
チ７，９と対をなすものである。上下のパンチ７，９は
ダイ８の押し型空間２３へ精密に嵌合し、かつ、ダイ８
と相対的に上下移動ができるようにされている。A hole-shaped die mounting portion 21 is formed in the middle wall 3 so as to vertically penetrate therethrough, and the die 8 is mounted therein and fixed by a fixing member 22 in a replaceable manner. The die 8 is also provided with a hole-shaped pressing space 23 penetrating vertically, and forms a pair with the upper and lower punches 7 and 9. The upper and lower punches 7 and 9 are precisely fitted into the press space 23 of the die 8 and
And can be moved up and down relatively.

【００１４】上下のパンチ駆動用のサーボモータ１２，
１８は共にＡＣサーボモータであり、これらはそれぞれ
が信号及び動力線２４でサーボアンプ２５を経て制御装
置２６に接続されている。Servo motors 12 for driving the upper and lower punches,
Reference numerals 18 denote AC servomotors, each of which is connected to a control device 26 via a servo amplifier 25 via signal and power lines 24.

【００１５】制御装置２６は入力部、記憶部、比較部、
出力部およびこれらの作動を調整する制御部を備えた通
常の構成を有し、パンチを作動する通常の制御の他に次
のフィードバック制御処理が行なわれる。すなわち、入
力部にはボールナット１１に取付けたストレインゲージ
３４からの検出値とキイーボードなどからのパンチの圧
縮力に関する設定値が入力され、記憶部はパンチの各種
作動に関する作動プログラムを備えると共に前記の入力
された設定値を記憶する。The control device 26 includes an input unit, a storage unit, a comparison unit,
It has a normal configuration including an output unit and a control unit that adjusts the operation thereof, and performs the following feedback control processing in addition to the normal control of operating the punch. That is, a detection value from the strain gauge 34 attached to the ball nut 11 and a set value relating to the compressive force of the punch from a key board or the like are input to the input unit, and the storage unit includes an operation program relating to various operations of the punch. Store the input setting value.

【００１６】そして、比較部は制御部によるタイミング
によって前記ゲージ２７からの検出値（圧縮力に換算
後）と記憶された設定値とを比較し、パンチの圧縮力が
設定値に到達しているか否かを判断し、未到達の場合は
サーボモーターの駆動を継続し、設定値に到達したこと
が確認されたらサーボモータの駆動を停止する。すなわ
ち、サーボモータのその回の圧縮駆動はダイとパンチ間
の圧縮力に基づいて制御される。The comparing section compares the detected value (converted into a compressive force) from the gauge 27 with the stored set value at the timing of the control section to determine whether the compressive force of the punch has reached the set value. It is determined whether or not the driving has not been reached, and if not reached, the driving of the servo motor is continued. That is, the compression drive of the servo motor at that time is controlled based on the compression force between the die and the punch.

【００１７】パンチの圧縮力の検出は、前記のようなス
トレインゲージ３４の他にロードセルなどでも可能であ
り、また、取付ける位置もボールナット１１に限らず上
パンチ７、下パンチ９の駆動機構に関連する個所に可能
である。前記設定値の入力用キイーボード、圧縮力を検
出するセンサー、これらが接続される制御装置およびサ
ーボアンプなどがサーボモータ１２，１８の制御手段を
構成している。The compression force of the punch can be detected not only by the strain gauge 34 as described above but also by a load cell, and the mounting position is not limited to the ball nut 11 but can be determined by the drive mechanism of the upper punch 7 and the lower punch 9. It is possible in relevant places. A key board for inputting the set values, a sensor for detecting the compressive force, a control device and a servo amplifier to which these are connected constitute control means for the servo motors 12 and 18.

【００１８】第１図において符号２７は原料粉体を投入
するホッパーで、可撓性のホース２８で下方のフィード
シュー２９に接続されている。フィードシュー２９は底
面が開放された容器で、ソレノイド３０により中段壁３
の上面を押し型空間２３の直上まで移動されて引戻され
るものである。また、符号３１は成形品の突落し装置で
ソレノイド３２により駆動される。下パンチ９を挟んで
突落し装置３１と反対側には成形品を外部に取出すシュ
ート３３が配置されている。この成形品突落し装置３１
及びシュート３３は中段壁３の上面側に設ける場合や上
面、下面の両側に設けることもある。In FIG. 1, reference numeral 27 denotes a hopper for charging raw material powder, which is connected to a lower feed shoe 29 by a flexible hose. The feed shoe 29 is a container having an open bottom, and the solenoid 30 is used to feed the middle wall 3
The upper surface of is pushed to a position right above the die space 23 and pulled back. Further, reference numeral 31 is a device for pushing down a molded product, which is driven by a solenoid 32. A chute 33 for taking out the molded product to the outside is arranged on the opposite side of the lowering device 31 with the lower punch 9 interposed therebetween. This molded product drop-off device 31
The chute 33 may be provided on the upper surface side of the middle step wall 3 or may be provided on both sides of the upper surface and the lower surface.

【００１９】成形作動は、成形品に応じ選択された上パ
ンチ７、下パンチ９及びダイ８をそれぞれにセットした
のち、記憶された作動プログラムから制御装置２６によ
って選択されたプログラムに従い次のように行なわれ
る。The molding operation is performed by setting the upper punch 7, the lower punch 9 and the die 8 selected in accordance with the molded article respectively, and then according to the program selected by the controller 26 from the stored operation program as follows. Done.

【００２０】当初、上パンチ７が、中段壁３に固定され
ているダイ８から上方に引抜かれ退避位置に移動してお
り、また、下パンチ９はダイ８の押し型空間２３に嵌入
して押し型空間３の底を形成している。この成形材料受
入れ状態が確認されると、ソレノイド３０が作動されて
フィードシュー２９が押し型空間２３に移動して成形材
料を押し型空間２３に充填し、すぐに元位置に引き戻さ
れる。ついで上パンチ駆動用のサーボモータ１２が駆動
されて、ギア１４、タイミングベルト１５、ギア１３を
介してボールナット１１が回転され、さらに、上パンチ
駆動用ボールスクリュー６が下降されて、上パンチ７が
ダイ８の押し型空間２３に嵌入される。Initially, the upper punch 7 is pulled upward from the die 8 fixed to the middle step wall 3 and moves to the retracted position, and the lower punch 9 is fitted into the press space 23 of the die 8. The bottom of the press space 3 is formed. When the receiving state of the molding material is confirmed, the solenoid 30 is operated and the feed shoe 29 moves to the pressing space 23 to fill the molding material into the pressing space 23 and is immediately returned to the original position. Then, the servo motor 12 for driving the upper punch is driven, the ball nut 11 is rotated via the gear 14, the timing belt 15, and the gear 13, and the ball screw 6 for driving the upper punch is lowered, so that the upper punch 7 Is fitted in the press space 23 of the die 8.

【００２１】これにより、押し型空間２３内部の成形材
料は上パンチ駆動用ボールスクリュー６、下パンチ駆動
用ボールスクリュー１０にそれぞれ直圧された上パンチ
７、下パンチ９間でプレスされる。この時、サーボモー
タ１２，１８とボールスクリュー６，１０間の伝動機構
は、モータ側の出力軸線とボールスクリュー側の軸線が
平行に配置されているので、簡素な構成となり、部材の
歪みやバックラッシュによる伝動上の誤差が小さい。As a result, the molding material in the press space 23 is pressed between the upper punch 7 and the lower punch 9 which are directly pressed by the upper punch driving ball screw 6 and the lower punch driving ball screw 10, respectively. At this time, the transmission mechanism between the servo motors 12 and 18 and the ball screws 6 and 10 has a simple configuration because the output axis on the motor side and the axis on the ball screw side are arranged in parallel. Transmission error due to rush is small.

【００２２】この場合に、下パンチ９と上パンチ７の作
動に様々の態様を採用することができる。下パンチ駆動
用のサーボモータ１８が電磁ブレーキなどでロックさ
れ、下パンチ９は一定位置に停止したままで成形材料が
上パンチ７の押圧力のみで成形される場合。これは従来
の成形とほとんど同じであるがパンチの圧縮力に基づく
フィードバック制御により成形品における圧粉の密度は
均一であり、成形品間の重量のばらつきはきわめて少な
い。In this case, various modes can be adopted for the operation of the lower punch 9 and the upper punch 7. A case where the molding material is formed only by the pressing force of the upper punch 7 while the lower punch 9 is locked by an electromagnetic brake or the like and the lower punch 9 is stopped at a fixed position. This is almost the same as the conventional molding, but the density of the powder in the molded product is uniform by feedback control based on the compression force of the punch, and the variation in weight between the molded products is extremely small.

【００２３】上パンチ駆動用のサーボモータ１２と共に
下パンチ駆動用のサーボモータ１８も駆動され、成形材
料が上下から押圧され成形される場合。強い押圧力が発
揮され、また両面から押圧されるので成形品において圧
粉の密度が比較的低い部分を上下方向の中心に設定する
ことができる。あるいは必要に応じて上パンチ７、下パ
ンチ９の押圧力に差を持たせこれを制御することによ
り、密度が低くなる部分を成形品の上下方向の任意の位
置に設定することもできる。この場合もパンチの圧縮力
に関するフィードバック制御を併用することで圧粉の密
度や重量を各製品間で等しくすることができる。In the case where the servo motor 18 for driving the lower punch is driven together with the servo motor 12 for driving the upper punch, and the molding material is pressed from above and below to be molded. Since a strong pressing force is exerted and pressing is performed from both sides, a portion where the density of the powder compact is relatively low in the molded product can be set at the center in the vertical direction. Alternatively, if necessary, the pressing force between the upper punch 7 and the lower punch 9 is made different to control the pressing force, so that the portion where the density becomes low can be set at an arbitrary position in the vertical direction of the molded product. Also in this case, the density and the weight of the powder compact can be made equal among the products by using the feedback control regarding the compressive force of the punch together.

【００２４】上パンチ７と下パンチ９を交互に作動させ
る場合。交互押圧による一種の振動と内部の密度分布の
移動によって密度が高く、均一な成形品を得られ、パン
チの圧縮力が一定に制御されることにより製品間のばら
つきも解消される。When the upper punch 7 and the lower punch 9 are operated alternately. A high density and uniform molded product can be obtained by a kind of vibration due to the alternate pressing and the movement of the internal density distribution, and the variation between products can be eliminated by controlling the compression force of the punch to be constant.

【００２５】上パンチ７による押圧を、複数回に分けた
成形材料の供給時ごとに、その都度行う場合。突き固め
効果が生じて複雑な形状をした細長い成形品においても
圧粉密度の均一な成形品を得ることができる。この場
合、上パンチ７は上下方向への細かな移動（振動）を繰
返しながら徐々に上方へ移動し、その間の成形材料供給
時には押し型空間２３からぬけでて退避位置に戻るとい
う作動を繰返すことになるが、パンチの圧縮力を設定値
に関しフィードバック制御することにより前記の各繰返
しにおける圧縮力を一定にして圧粉の密度が高度に均一
な製品を得ることができる。一方、圧粉の密度に所定の
変化を持たせた製品を得ることもできる。In the case where the pressing by the upper punch 7 is performed each time the molding material is supplied a plurality of times. It is possible to obtain a molded product having a uniform green compact density even in an elongated molded product having a complicated shape due to a tamping effect. In this case, the upper punch 7 is gradually moved upward while repeating fine movement (vibration) in the vertical direction, and when the molding material is supplied during that period, the upper punch 7 escapes from the pressing die space 23 and returns to the retracted position. However, by performing feedback control of the compression force of the punch with respect to the set value, it is possible to obtain a product in which the compression force in each of the above repetitions is made constant and the density of the powder compact is highly uniform. On the other hand, it is also possible to obtain a product in which the density of the compact has a predetermined change.

【００２６】上パンチ７及び／あるいは下パンチ９の圧
縮力が設定値に到達したことが確認されると両パンチ間
の押圧力は若干緩められ、ついで両パンチ７，９は成形
品を挟持したまま下方（あるいは上方）に移動して成形
品をダイ８の押し型空間２３から脱出させる。そして、
上方パンチ７は成形品を下パンチ９上に残置したまま前
記の退避位置に移動し、成形品はこのとき付勢されるソ
レノイド３２で作動される突落し装置３１によって下パ
ンチ９上からシユート３３に落される。ついで下パンチ
９は下パンチ駆動用のサーボモータ１８の駆動でダイ８
の押し型空間２３に嵌入されて停止し、次回の成形サイ
クルへと移動する。When it is confirmed that the compression force of the upper punch 7 and / or the lower punch 9 has reached the set value, the pressing force between the two punches is slightly relaxed, and the punches 7 and 9 hold the molded product. While moving downward (or upward), the molded product escapes from the press space 23 of the die 8. And
The upper punch 7 moves to the retreat position with the molded product remaining on the lower punch 9, and the molded product is moved from above the lower punch 9 by the push-down device 31 operated by the solenoid 32 urged at this time. Is dropped. Next, the lower punch 9 is driven by a servo motor 18 for driving the lower punch, and the die 8 is driven.
Is stopped after being inserted into the press mold space 23 of the second mold cycle.

【００２７】なお、回転運動を直線運動に変換する機構
としてはこの他にもラックとピニオンによる機構も採用
することができる。また、粉末成形機におけるすべての
駆動を制御装置によるサーボモータで行なえば油汚れが
なく、騒音や振動の少ない快適な作業環境を実現できる
し、パンチの作動をサーボモータによる直接駆動とすれ
ば効率が良く従来の同規模の油圧式成形機と比較して約
３分の１の電力消費で成形することができ、ランニング
コストを削減することができる。As a mechanism for converting the rotary motion into a linear motion, a mechanism using a rack and a pinion can be employed. In addition, if all the driving of the powder molding machine is performed by a servo motor by a control device, a comfortable working environment with no oil contamination and less noise and vibration can be realized, and efficiency can be improved if the punch operation is directly driven by the servo motor. The molding can be performed with less power consumption than the conventional hydraulic molding machine of the same scale, and the running cost can be reduced.

【００２８】上、下のパンチ７，９とこれらを駆動する
それぞれのボールスクリュー６，１０との間にはリンク
や伝動機構が存在しないので、部材の伸びやバックラッ
シュなどにより、ボールスクリュー６，１０の駆動力が
阻害されることはない。Since there is no link or transmission mechanism between the upper and lower punches 7 and 9 and the respective ball screws 6 and 10 for driving them, the ball screws 6 and 9 are stretched due to elongation of members and backlash. The driving force of 10 is not hindered.

【００２９】[0029]

【発明の効果】パンチの圧縮力を、パンチの実際の圧縮
力を検出してこれをフイードバックし、設定値までクロ
ーズドループで制御するので、それぞれに圧粉の密度が
均一で寸法精度の高い成形品を得ることができる。パン
チの作動をサーボモータを介して制御装置で制御するの
で、ダイ及びパンチ（金型）を設定する際の複雑で煩わ
しいメカニカルな設定が不要になり、迅速な型交換が可
能である。これにより、粉末成形機の操作性が向上す
る。According to the present invention, since the actual compression force of the punch is detected and fed back to the set value, the compression force of the punch is controlled in a closed loop up to the set value. Goods can be obtained. Since the operation of the punch is controlled by the control device via the servomotor, complicated and cumbersome mechanical setting when setting the die and the punch (die) is not required, and quick die change is possible. This improves the operability of the powder molding machine.

【００３０】上、下のパンチは、ボールスクリューの直
圧で駆動されるので、制御上の応答性が高く精度の高い
制御を行うことができる。ボールスクリューとサーボモ
ータが、ボールスクリューの軸線とサーボモータの出力
軸の軸線とが平行に配置されることにより、伝動上の誤
差が小さいので、正確な圧縮成形を行える。また、機械
の幅寸法を小さくすることができる。サーボモータの本
体側をパンチ側に配置すると、ボールスクリューとパン
チの作動に必要な寸法とサーボモータを配置するのに必
要な寸法が重なるので、サーボモータによって機械の上
下寸法を大きくしてしまうことがない。Since the upper and lower punches are driven by the direct pressure of the ball screw, highly responsive control is possible and highly accurate control can be performed. Since the ball screw and the servomotor are arranged so that the axis of the ball screw and the axis of the output shaft of the servomotor are parallel to each other, errors in transmission are small, so that accurate compression molding can be performed. Further, the width of the machine can be reduced. If the main body of the servomotor is placed on the punch side, the dimensions necessary for the operation of the ball screw and the punch and the dimensions required for arranging the servomotor overlap, so the vertical dimension of the machine may be increased by the servomotor. There is no.

【図面の簡単な説明】[Brief description of drawings]

【図１】一部を破断して示す正面図である。FIG. 1 is a partially cutaway front view.

【符号の説明】[Explanation of symbols]

１…粉末成形機 ２…上段壁 ３…中段壁 ４…下段壁 ５…フレーム ６…上パンチ駆動用ボールスクリュー ７…上パンチ ８…ダイ ９…下パンチ １０…下パンチ駆動用ボールスクリュー １１，１６…ボールナット １２…上パンチ駆動用のサーボモータ １３，１４，１７，１９…ギア １５，２０…タイミングベルト １８…下パンチ駆動用のサーボモータ ２１…ダイ装着部 ２２…固定部材 ２３…押し型空間 ２４…信号及び動力線 ２５…サーボアンプ ２６…制御装置 ２７…ホッパー ２８…ホース ２９…フィードシュー ３０，３２…ソレノイド ３１…突落し装置 ３３…シュート ３４…ストレインゲージ 1 ... Powder molding machine 2 ... Upper wall 3 ... Middle wall 4 ... Lower wall 5 ... Frame 6 ... Upper punch driving ball screw 7 ... Upper punch 8 ... Die 9 ... Lower punch 10 ... Lower punch driving ball screw 11, 16 ... Ball nut 12 ... Servo motor for driving upper punch 13,14,17,19 ... Gear 15,20 ... Timing belt 18 ... Servo motor for driving lower punch 21 ... Die mounting part 22 ... Fixing member 23 ... Push space 24 ... Signal and power line 25 ... Servo amplifier 26 ... Control device 27 ... Hopper 28 ... Hose 29 ... Feed shoe 30, 32 ... Solenoid 31 ... Crushing device 33 ... Shoot 34 ... Strain gauge

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小山 成昭 山梨県南都留郡忍野村忍草字古馬場3580番 地 ファナック株式会社基礎技術研究所内 (72)発明者 平 尊之 山梨県南都留郡忍野村忍草字古馬場3580番 地 ファナック株式会社生産技術研究所内 (72)発明者 稲葉 善治 東京都日野市旭が丘３丁目５番地１ ファ ナック株式会社商品開発研究所内 (72)発明者 内藤 英夫 東京都日野市旭が丘３丁目５番地１ ファ ナック株式会社商品開発研究所内 (72)発明者 渡辺 菊夫 東京都日野市旭が丘３丁目５番地１ ファ ナック株式会社商品開発研究所内 (72)発明者 村中 正樹 東京都日野市旭が丘３丁目５番地１ ファ ナック株式会社商品開発研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeaki Koyama 3580 Koshinoba, Oshinomura, Minamitsuru-gun, Yamanashi Prefecture FANUC CORPORATION, Basic Research Laboratory (72) Inventor Takayuki Taira, Shinobu, Oshinomura, Minamitsuru-gun, Yamanashi Prefecture Baba 3580 FANUC CORPORATION Production Technology Laboratory (72) Inventor Zenji Inaba 3-5 Asahigaoka, Hino City, Tokyo 1 FANUC Corporation Product Development Laboratory (72) Inventor Hideo Naito 3 Asahigaoka, Hino City, Tokyo No. 5 1 FANUC Corporation Product Development Laboratory (72) Inventor Kikuo Watanabe 3-5 Asahigaoka, Hino City, Tokyo 1-5 FANUC Corporation Product Development Laboratory (72) Inventor Masaki Muranaka 3 Asahigaoka, Hino City, Tokyo 5-chome 1 Fanuc Co., Ltd. Product Development Laboratory

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 成形部にダイと上パンチ、下パンチを備
え、ボールスクリューによる直圧でパンチを駆動するパ
ンチの駆動機構をサーボモータに連動連結すると共に、
成形機のフレームに対してボールスクリューとサーボモ
ータがボールスクリューの軸線とサーボモータの出力軸
の軸線とを平行に、かつ、サーボモータの本体側がパン
チ側となるように配置されており、パンチの圧縮力を検
出するセンサーを設け、該センサーの出力値が設定した
圧縮力に相当するものとなるまでサーボモータのその回
の圧縮駆動をダイとパンチ間の圧縮力に基づいて制御す
る制御手段を設けたことを特徴とする粉末成形機。1. A forming unit includes a die, an upper punch, and a lower punch, and a punch driving mechanism for driving the punch by direct pressure from a ball screw is operatively connected to a servomotor.
The ball screw and the servomotor are arranged so that the axis of the ball screw and the axis of the output shaft of the servomotor are parallel to the frame of the molding machine, and the main body of the servomotor is on the punch side. A control means for providing a sensor for detecting the compression force, and controlling the current compression drive of the servo motor based on the compression force between the die and the punch until the output value of the sensor becomes equivalent to the set compression force. A powder molding machine characterized by being provided.
JP28640495A 1995-10-09 1995-10-09 Electric powder molding machine Expired - Fee Related JP2657911B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28640495A JP2657911B2 (en) 1995-10-09 1995-10-09 Electric powder molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28640495A JP2657911B2 (en) 1995-10-09 1995-10-09 Electric powder molding machine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP63005704A Division JP2519498B2 (en) 1988-01-16 1988-01-16 Electric powder molding machine

Publications (2)

Publication Number Publication Date
JPH08206891A true JPH08206891A (en) 1996-08-13
JP2657911B2 JP2657911B2 (en) 1997-09-30

Family

ID=17703969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28640495A Expired - Fee Related JP2657911B2 (en) 1995-10-09 1995-10-09 Electric powder molding machine

Country Status (1)

Country Link
JP (1) JP2657911B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004141696A (en) * 2002-10-21 2004-05-20 Mitsuboshi Belting Ltd Metallic die for filter molding, and method for manufacturing filter molding
WO2006040630A2 (en) * 2004-10-12 2006-04-20 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Compression moulding apparatus and method for forming plastics objects
JP2007008158A (en) * 2005-05-31 2007-01-18 Mitsuboshi Belting Ltd Manufacturing method of filter formed body
CN103042712A (en) * 2012-12-17 2013-04-17 常州亚邦化学有限公司 Ball press machine
US20170095860A1 (en) * 2015-10-06 2017-04-06 Toyota Jidosha Kabushiki Kaisha Method for controlling powder compacting apparatus and compacting apparatus
JP2017070974A (en) * 2015-10-06 2017-04-13 トヨタ自動車株式会社 Control method for powder molding device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004141696A (en) * 2002-10-21 2004-05-20 Mitsuboshi Belting Ltd Metallic die for filter molding, and method for manufacturing filter molding
WO2006040630A2 (en) * 2004-10-12 2006-04-20 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Compression moulding apparatus and method for forming plastics objects
WO2006040630A3 (en) * 2004-10-12 2006-08-03 Sacmi Compression moulding apparatus and method for forming plastics objects
JP2008515661A (en) * 2004-10-12 2008-05-15 サクミ コオペラティヴァ メッカニチ イモラ ソシエタ コオペラティヴァ Compression molding apparatus and method for molding plastic objects
JP2007008158A (en) * 2005-05-31 2007-01-18 Mitsuboshi Belting Ltd Manufacturing method of filter formed body
CN103042712A (en) * 2012-12-17 2013-04-17 常州亚邦化学有限公司 Ball press machine
US20170095860A1 (en) * 2015-10-06 2017-04-06 Toyota Jidosha Kabushiki Kaisha Method for controlling powder compacting apparatus and compacting apparatus
JP2017070974A (en) * 2015-10-06 2017-04-13 トヨタ自動車株式会社 Control method for powder molding device
JP2017070975A (en) * 2015-10-06 2017-04-13 トヨタ自動車株式会社 Control method for powder molding device

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