JPH0342159B2 - - Google Patents
Info
- Publication number
- JPH0342159B2 JPH0342159B2 JP59043627A JP4362784A JPH0342159B2 JP H0342159 B2 JPH0342159 B2 JP H0342159B2 JP 59043627 A JP59043627 A JP 59043627A JP 4362784 A JP4362784 A JP 4362784A JP H0342159 B2 JPH0342159 B2 JP H0342159B2
- Authority
- JP
- Japan
- Prior art keywords
- center
- crankshaft
- slide
- press
- pin
- 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.)
- Expired - Lifetime
Links
- 230000009467 reduction Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- B30B1/26—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 cams, eccentrics, or cranks
-
- 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
- B30B1/26—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 cams, eccentrics, or cranks
- B30B1/268—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 cams, eccentrics, or cranks using a toggle connection between driveshaft and press ram
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Description
【発明の詳細な説明】
本発明は冷間押出加工に適したリンクプレスに
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a link press suitable for cold extrusion processing.
従来、金属の押出、据え込み等の加工用プレス
では、比較的長いストロークの間高いトルク能力
を有することが要求され、プレスのスライドの下
降速度はプレス加工工程中は遅く、下死点後の上
昇得度は早いことが望ましい。そこで上述の要求
を満足するプレスとして、クランク軸の偏心部に
レバーの中央部を適合させ、レバーの一端をリン
クを介してフレームに枢着すると共に他端をコン
ロツドを介してプレスのスライドに連結した機械
プレスが特開昭52−1675号公報で発表されてい
る。ところで、このプレスでは第７図に示すよう
にクランク軸の中心を含む垂直面内にプレスのス
ライドとコンロツドの下端との連結点が設けられ
ているために、スライドの下死点前において、コ
ンロツドの傾きが変化する。すなわち、コンロツ
ド１８はコンロツドの上端がＤのときは右上り
（同図においてxy平面の原点をO4とすれば傾きは
＋）であり、Ｅ点のときは左上り（傾きは−）と
なる。その結果、スライドに作用するスラスト荷
重の向きは変化し、スライドはスライドとスライ
ドの案内面との間にスキマが存在すれば、その分
だけ横に移動することになる。この間にプレス加
工されるワークにはこの移動による寸法精度の低
下が発生し、またスライドは繰り返えしの移動に
より衝撃が発生し、カイド面の磨耗が促進される
などの欠点があつた。 Conventionally, presses for metal extrusion, upsetting, etc. are required to have high torque capacity during relatively long strokes, and the descending speed of the press slide is slow during the press processing process, and after bottom dead center It is desirable to increase the rate quickly. Therefore, in order to create a press that satisfies the above requirements, the central part of the lever is adapted to the eccentric part of the crankshaft, one end of the lever is pivotally connected to the frame via a link, and the other end is connected to the slide of the press via a connecting rod. A mechanical press using this technology was announced in Japanese Patent Application Laid-Open No. 1675/1983. By the way, in this press, as shown in Fig. 7, the connecting point between the slide of the press and the lower end of the conrod is provided in a vertical plane that includes the center of the crankshaft, so the conrod The slope of changes. In other words, when the upper end of the connecting rod 18 is at point D, it is upward to the right (if the origin of the xy plane is O4 in the figure, the slope is +), and when it is at point E, it is upward to the left (the slope is -). . As a result, the direction of the thrust load acting on the slide changes, and if there is a gap between the slide and the guide surface of the slide, the slide will move laterally by that amount. During this time, the dimensional accuracy of the press-formed workpieces deteriorated due to this movement, and the repeated movement of the slides generated shocks, accelerating wear on the guide surface.
本発明の目的は、プレス加工が行なわれる下死
点近傍において、前記スライドの横移動の生じな
いリンクプレスを提供することにある。以下本発
明の実施例について図面を参照して説明する。 An object of the present invention is to provide a link press in which lateral movement of the slide does not occur near the bottom dead center where press working is performed. Embodiments of the present invention will be described below with reference to the drawings.
第１図及び第２図において、プレスのフレーム
１上部に設けた駆動系の構造を示している。フレ
ーム１の後方には駆動軸２が回転自在に支持され
ている。（第１図は展開図になつている。）駆動軸
２の一端部には同心にフライホイール３が回転自
在に設けられ、その外周とモータ（図示せず）の
出力軸とはベルトで連結されている。フライホイ
ール３と駆動軸２との間にはフライホイール３の
回転力を接・断するためのクラツチ４が設けら
れ、また駆動軸２の他端部にはブレーキ５が設け
られている。フレーム１には駆動軸２と平行に、
２本の中間軸６，６′とクランク軸７と回転自在
に支持されている。駆動軸２と中間軸６との間に
はピニオンとギヤからなる２組の減速ギヤ８，
８′が設けられ、また中間軸６とクランク軸７と
の間にもピニオンとギヤからなる２組の減速ギヤ
９，９′が設けられている。クランク軸７の偏心
部１０には後述するレバー１１が回転自在に適合
している。 1 and 2, the structure of the drive system provided on the upper part of the frame 1 of the press is shown. A drive shaft 2 is rotatably supported at the rear of the frame 1. (Figure 1 is a developed view.) A flywheel 3 is rotatably provided concentrically at one end of the drive shaft 2, and its outer periphery is connected to the output shaft of a motor (not shown) by a belt. has been done. A clutch 4 for connecting and disconnecting the rotational force of the flywheel 3 is provided between the flywheel 3 and the drive shaft 2, and a brake 5 is provided at the other end of the drive shaft 2. In the frame 1, parallel to the drive shaft 2,
It is rotatably supported by two intermediate shafts 6, 6' and a crankshaft 7. Between the drive shaft 2 and the intermediate shaft 6 are two sets of reduction gears 8 consisting of a pinion and a gear.
8', and also between the intermediate shaft 6 and the crankshaft 7 are two sets of reduction gears 9, 9' consisting of a pinion and a gear. A lever 11, which will be described later, is rotatably fitted to the eccentric portion 10 of the crankshaft 7.
第３図、第４図および第５図において、クラン
ク軸７とプレスとスライド１２との連結機構を示
している。クランク軸７の偏心部１０にはレバー
１１のほぼ中央部が回転自在に適合している。レ
バー１１の一端部にはピン１３を介してリンク１
４の一端部が連結され、リンク１４の他端部はフ
レーム１に支点ピン１５を介して連結されてい
る。レバー１１の他端部にはピン１６及び円板１
７を介してコンロツド１８の上端部が回転自在に
連結されている。コンロツド１８の下端部はピン
１９を介してスライド１２の連結部材２０に連結
されている。ピン１９の中心O4はスライド１２
の中心に設けられ、クランク軸７の中心O1に対
し距離ｌだけ後方に位置し、スライド１２はフレ
ーム１に昇降自在に案内されている。 3, 4, and 5 show a connection mechanism between the crankshaft 7, the press, and the slide 12. As shown in FIG. A substantially central portion of the lever 11 is rotatably adapted to the eccentric portion 10 of the crankshaft 7. A link 1 is connected to one end of the lever 11 via a pin 13.
4 are connected to each other, and the other end of the link 14 is connected to the frame 1 via a fulcrum pin 15. A pin 16 and a disc 1 are attached to the other end of the lever 11.
The upper end of the connecting rod 18 is rotatably connected via the connecting rod 7. The lower end of the connecting rod 18 is connected to a connecting member 20 of the slide 12 via a pin 19. Center O 4 of pin 19 is slide 12
The slide 12 is provided at the center of the crankshaft 7 and is located a distance l behind the center O 1 of the crankshaft 7, and the slide 12 is guided by the frame 1 so as to be movable up and down.
従つてクランク軸７の中心O1を回転中心とし
て偏心部１０の中心O2が矢印Ａの方向に回転す
ると、リンク１４は支点ピン１５の中心O5を中
心としてピン１３が円弧を描くように揺動し、レ
バー１１はこれらの複合運動により揺動し、他端
部のピン１６の中心O3は楕円状の運動を行ない、
コンロツド１８をピン１９回りに揺動させながら
ピン１９、連結部材２０を介してスライド１２を
昇降させる。 Therefore, when the center O2 of the eccentric portion 10 rotates in the direction of arrow A about the center O1 of the crankshaft 7, the link 14 rotates so that the pin 13 draws an arc about the center O5 of the fulcrum pin 15. The lever 11 swings due to these combined movements, and the center O3 of the pin 16 at the other end performs an elliptical movement.
The slide 12 is raised and lowered via the pin 19 and the connecting member 20 while swinging the connecting rod 18 around the pin 19.
次に作用について述べる。第１図〜第７図にお
いて、モータ（図示せず）を起動して第１図、第
２図に示すフライホイール３を回転させておく。
プレス加工を行なうときはクラツチ４及びブレー
キ５に圧縮エアを供給してプレスを回転させ、逆
に排気してプレスを停止させる。駆動軸２の等速
回転は減速ギヤ８，９を介して減速されクランク
軸１０を等速回転させる。第３図、第４図に示す
クランク軸７の等速回転に伴ない偏心部１０が回
転すると、レバー１１は、リンク１４の揺動に伴
なう円弧運動と複合した運動を行ない、レバー１
１の他端部のピン１６の中心O3は第５図に示す
ような楕円状の運動を行なう。ピン１６の運動は
コンロツド１８、ピン１９、連結部材２０を介し
てプレスのスライド１２を昇降させる。第４図、
第５図において、クランク軸７の中心O1に対す
る偏心部１０の中心O2の回転角を基準としてス
ライド１２の運動を代表するピン１９の中心O4
の運動をストローク曲線として描くと第６図に示
すとおりとなり、スライド１２の上死点O4′は回
転角330°〜350°近傍にあり下死点は回転角180°近
傍にある。 Next, we will discuss the effect. 1 to 7, a motor (not shown) is started to rotate the flywheel 3 shown in FIGS. 1 and 2.
When press working, compressed air is supplied to the clutch 4 and brake 5 to rotate the press, and conversely, the air is exhausted to stop the press. The constant speed rotation of the drive shaft 2 is reduced through reduction gears 8 and 9, causing the crankshaft 10 to rotate at a constant speed. When the eccentric portion 10 rotates as the crankshaft 7 rotates at a constant speed as shown in FIGS.
The center O 3 of the pin 16 at the other end of the pin 1 moves in an ellipse as shown in FIG. The movement of the pin 16 raises and lowers the slide 12 of the press via the connecting rod 18, pin 19 and connecting member 20. Figure 4,
In FIG. 5, the center O 4 of the pin 19 represents the movement of the slide 12 based on the rotation angle of the center O 2 of the eccentric portion 10 with respect to the center O 1 of the crankshaft 7.
If the motion is drawn as a stroke curve, it will be as shown in FIG. 6, where the top dead center O 4 ' of the slide 12 is near the rotation angle of 330° to 350°, and the bottom dead center is near the rotation angle of 180°.
プレス加工が行なわれる回転角90°〜180°にお
ける中心O3の位置は点Ｂから点Ｃまでの軌跡を
描き何れもスライド１２の中心であるピン１９の
中心O4を含む垂直面の前側（第５図においては
右側）にあり、この間におけるコンロツドの傾き
は全て右上りになつている。 The position of the center O 3 at a rotation angle of 90° to 180° during press working is located on the front side of the vertical plane ( (in Fig. 5, it is on the right side), and the slope of the connecting rod in this area is all upward to the right.
このことはスライド１２の中心であるピン１９
の中心O4をクランク軸７の中心O1よりも距離ｌ
だけ後側に離隔させたことにより可能となるたも
のである。これに対し第７図に示す従来例では前
述した通りクランク軸中心とスライド中心とを同
一垂直面上に置いたため、点Ｆ及び点Ｇにおいて
クランク軸中心を通る垂直面と交差し、従つてコ
ンロツドの垂直面に対する傾斜方向はプレス加工
中に変わる。実施例においてはプレス加工中コン
ロツド１８の傾斜方向が不変であり、コンロツド
１８に作用する荷重によるスライド１２の方向も
不変である。従つてスライド１２はガイド面に沿
つて垂直に下降し、ワークの寸法精度を向上させ
ることができる。 This means that pin 19, which is the center of slide 12,
Distance l from the center O 4 of the crankshaft 7 to the center O 1 of the crankshaft 7
This was made possible by separating the two points to the rear. On the other hand, in the conventional example shown in Fig. 7, as mentioned above, the crankshaft center and the slide center are placed on the same vertical plane, so points F and G intersect with the vertical plane passing through the crankshaft center, and therefore the conrod The direction of inclination with respect to the vertical plane changes during pressing. In this embodiment, the direction of inclination of the connecting rod 18 remains unchanged during pressing, and the direction of the slide 12 due to the load acting on the connecting rod 18 also remains unchanged. Therefore, the slide 12 descends vertically along the guide surface, and the dimensional accuracy of the workpiece can be improved.
以上の説明から明らかなように本発明によれ
ば、このリンクプレスでプレス加工が行なわれる
クランク軸の回転角90°〜180°の間において、中
心O3の移動軌跡が中心O1及び中心O4を夫々含む
２つの垂直面間にあるので、中心O3が中心O1と
中心O4とを結ぶ直線の近傍にあり、クランク軸
の動力の伝達が効率的に行なわれ、高いトルク能
力を持つことができ、またこの間にプレス加工に
よるスライドの横荷重が一定方向を向くので、従
来のように横荷重の方向変化によるスライドの移
動及びそれに伴なう衝撃の発生がなく、ワークの
精度の向上と、スライドの案内部の摩耗量の低下
とが計りうるなど、実用上の効果と利点は大き
い。 As is clear from the above description, according to the present invention, within the rotation angle of 90° to 180° of the crankshaft on which press working is performed with this link press, the movement locus of the center O 3 is the center O 1 and the center O 4 , the center O 3 is near the straight line connecting the centers O 1 and O 4 , and the power of the crankshaft is efficiently transmitted, resulting in high torque capacity. During this time, the lateral load on the slide due to press processing is directed in a fixed direction, so there is no movement of the slide due to changes in the direction of the lateral load and the occurrence of shocks, which is the case with conventional methods, and the accuracy of the workpiece can be improved. The practical effects and advantages are significant, such as improvement and reduction in the amount of wear on the guide portion of the slide.
第１図はプレス上部の要部断面図、第２図はそ
の縦断面右側面図、第３図は要部縦断面正面図、
第４図はその縦断面左側面図、第５図は作用説明
図、第６図はストローク曲線、第７図は従来例の
作用説明図及びストローク曲線である。
１はフレーム、２は駆動軸、３はフライホイー
ル、４はクラツチ、５はブレーキ、６，６′は中
間軸、７はクランク軸、８，８′は減速ギヤ、９，
９′は減速ギヤ、１０は偏心部、１１はレバー、
１２はスライド、１３はピン、１４はリンク、１
５は支点ピン、１６はピン、１７は円板、１８は
コンロツド、１９はピン、２０は連結部材であ
る。
Figure 1 is a sectional view of the main part of the upper part of the press, Figure 2 is a right side view of its longitudinal section, and Figure 3 is a front view of its main part in longitudinal section.
FIG. 4 is a vertical cross-sectional left side view thereof, FIG. 5 is an action explanatory diagram, FIG. 6 is a stroke curve, and FIG. 7 is an action explanatory diagram and a stroke curve of a conventional example. 1 is a frame, 2 is a drive shaft, 3 is a flywheel, 4 is a clutch, 5 is a brake, 6, 6' is an intermediate shaft, 7 is a crankshaft, 8, 8' is a reduction gear, 9,
9' is a reduction gear, 10 is an eccentric part, 11 is a lever,
12 is a slide, 13 is a pin, 14 is a link, 1
5 is a fulcrum pin, 16 is a pin, 17 is a disc, 18 is a connecting rod, 19 is a pin, and 20 is a connecting member.
Claims (1)
自在に嵌合し、該レバーの上端部をリンクを介し
てプレスのフレームに連結するとともに、下端部
をコンロツドを介してプレスのスライドに連結
し、前記クランク軸を動力源により回転駆動して
前記スライドを上下に往復動させるリンクプレス
において、前記コンロツドと前記スライドとの連
結部の中心O4を含む垂直面と前記クランク軸の
中心O1を含む垂直面とを若干の距離ｌだけ離隔
させて中心O1と中心O4とを設け、前記クランク
軸の中心O1に対する前記偏心部の中心O2の回転
角が90度から180度に至る間に、前記レバー下端
部と前記コンロツド上端との連結部の中心O3の
移動軌跡が前記両垂直面の間にあるように構成し
たことを特徴とするリンクプレス。1. The central part of the lever is rotatably fitted to the eccentric part of the crankshaft, the upper end of the lever is connected to the frame of the press via a link, and the lower end is connected to the slide of the press via a connecting rod. , in a link press in which the slide is reciprocated up and down by rotationally driving the crankshaft by a power source, a vertical plane including the center O4 of the connecting portion between the connecting rod and the slide and the center O1 of the crankshaft are A center O 1 and a center O 4 are provided with a slight distance l from the vertical plane including the crankshaft, and the rotation angle of the center O 2 of the eccentric portion with respect to the center O 1 of the crankshaft ranges from 90 degrees to 180 degrees. The link press is characterized in that the locus of movement of the center O3 of the connecting portion between the lower end of the lever and the upper end of the connecting rod is between the two vertical planes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4362784A JPS60187498A (en) | 1984-03-07 | 1984-03-07 | Link press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4362784A JPS60187498A (en) | 1984-03-07 | 1984-03-07 | Link press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60187498A JPS60187498A (en) | 1985-09-24 |
| JPH0342159B2 true JPH0342159B2 (en) | 1991-06-26 |
Family
ID=12669088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4362784A Granted JPS60187498A (en) | 1984-03-07 | 1984-03-07 | Link press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60187498A (en) |
-
1984
- 1984-03-07 JP JP4362784A patent/JPS60187498A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60187498A (en) | 1985-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1116534C (en) | Mechanically actuated disk brake and clutch | |
| TW201302446A (en) | Linkage type punch | |
| US5544577A (en) | Mechanical pressing machine with means for cancelling load fluctuation torque | |
| JPH05169151A (en) | Punch press | |
| EA016473B1 (en) | Mechanical forming press | |
| US3855839A (en) | Drive linkage for double action press | |
| US3772986A (en) | Mechanical double action press using a link mechanism | |
| JPH0342159B2 (en) | ||
| US4138904A (en) | Link drive mechanism for mechanical presses | |
| US4195564A (en) | Machine press | |
| JP2000301384A (en) | Knuckle press | |
| JP2003205394A (en) | Slide driving device of press machine | |
| JPS6310099A (en) | Slide driving device for press | |
| JPS63503445A (en) | double acting screw press | |
| US5720201A (en) | Pressing machine | |
| JPH0231619B2 (en) | ||
| JP2895219B2 (en) | Press and material processing method | |
| US4662234A (en) | Driving apparatus for powder compacting press | |
| JPH10323796A (en) | Slide driving device of machine press | |
| JPS6024300A (en) | Driving device by slide | |
| JPS6192800A (en) | Driving device for powder molding press machine | |
| JP3623104B2 (en) | Link press slide drive device | |
| JPS6338035Y2 (en) | ||
| JPH0248157Y2 (en) | ||
| JP2003230986A (en) | Press device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |