EP1207039A2 - Press machine - Google Patents
Press machine Download PDFInfo
- Publication number
- EP1207039A2 EP1207039A2 EP01126868A EP01126868A EP1207039A2 EP 1207039 A2 EP1207039 A2 EP 1207039A2 EP 01126868 A EP01126868 A EP 01126868A EP 01126868 A EP01126868 A EP 01126868A EP 1207039 A2 EP1207039 A2 EP 1207039A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- oscillator
- crankshaft
- slide
- support shaft
- frame
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0064—Counterbalancing means for movable press elements
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- 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
- B30B1/02—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 lever mechanism
- B30B1/06—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 lever mechanism operated by cams, eccentrics, or cranks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
- B30B15/0035—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height using an adjustable connection between the press drive means and the press slide
Definitions
- the present invention relates to a press machine which transmits power from a crankshaft supported on a frame to a slide by a power transmission.
- the press machine comprises: a frame, a crankshaft disposed on the frame so as to rotate about a horizontally extending axis, a slide disposed on the frame so as to move vertically, and a power transmission for transmitting rotation of the crankshaft to the slide.
- the power transmission includes: a support shaft supported on the frame so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft and having an eccentric portion; an oscillator supported on the eccentric portion of the support shaft so as to oscillate or swing; a connection for connecting the oscillator with the eccentric portion of the crankshaft so as to oscillate with rotation of the crankshaft; and a connecting link pivotally connected with the oscillator and the slide so as to have the slide perform vertical motion.
- the eccentric portion of the support shaft acts as a fulcrum for oscillation of the oscillator connected therewith.
- the connection is reciprocated, thereby oscillating the oscillator about the eccentric portion of the support shaft.
- the oscillation of the oscillator is a motion about a horizontally extending axis and is transmitted to the slide by the connecting link. This makes the slide move vertically.
- the stroke length adjusting mechanism is simplified, and the rotation phase of the crankshaft is not displaced even if the stroke length is changed.
- the press machine can further comprise a slider disposed on the frame so as to move vertically and pivotally connected with the oscillator and the connection.
- the oscillator can extend from a connecting portion with the connection to a connecting portion with the support shaft through a connecting portion with the connecting link.
- the power transmission can further include: a second support shaft supported on the frame so as to angularly rotate about an axis parallel to the rotation axis of the crankshaft and having a second eccentric portion; a second oscillator supported on the second eccentric portion so as to oscillate and pivotally connected with the connection so as to oscillate with rotation of the crankshaft; and a second connecting link pivotally connected with the second oscillator and the slide so as to have the slide perform vertical motion with the oscillation of the second oscillator.
- the press machine can further comprise: a balancing weight disposed on the frame so as to move vertically; and a connector for connecting the balancing weight with the oscillator so as to have the balancing weight perform vertical motion at a phase difference of 180° with respect to vertical motion of the slide. This makes the vertical motion of the slide and the balancing weight opposite to offset unbalanced force attributable to the vertical motion of the slide and the balancing weight.
- the balancing weight is disposed above the crankshaft and the oscillator, and the oscillator extends from the connecting portion with the connection to the connecting portion with the connector through the connecting portion with the connecting link and the connecting portion with the support shaft in this order.
- the power transmission further includes: a second support shaft supported on the frame so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft and having an eccentric portion; a second oscillator supported on the eccentric portion of the support shaft so as to oscillate and pivotally connected with the connection so as to oscillate with rotation of the crankshaft; and a second connecting link pivotally connected with the second oscillator and the slide so as to have the slide perform vertical motion with oscillation of the second oscillator.
- the press machine 10 comprises a lower frame 12 for mounting a drag and an upper frame 14 supported on the lower frame 12.
- a crankshaft 16 is supported on the upper frame 14 so as to rotate about a horizontally extending axis and receives rotation of a flywheel 18 shown in Fig. 3.
- the flywheel 18 is rotated by a motor not shown such as an electric motor.
- a so-called slide 20 supporting the cope is assembled into the lower ends of a pair of connecting rods, i.e., plungers 22 which extend through the lower end portion of the upper frame 14 so as to move vertically. Both plungers 22 extend upward in parallel from both end portions of the slide 20 and are reciprocated vertically by a power transmission 30 with rotation of the crankshaft 16. This makes the slide 20 reciprocate in the vertical direction.
- the power transmission 30 includes: a pair of support shafts 32 supported on the frame 14 so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft; an oscillator 34 supported on each support shaft 32 so as to oscillate, i.e., swing; a connection 36 for connecting both oscillators 34 with the crankshaft 16 so as to have both oscillators 34 oscillate synchronously with rotation of the crankshaft 16; a pair of sliders 38 disposed on the frame 14 so as to move vertically; and a connecting link 40 for connecting the oscillator 34 with the slide 20 so as to move the slide 20 vertically with oscillation of the oscillator 34.
- the support shafts 32 extend horizontally in parallel at an interval in a direction to intersect the rotation axis of the crankshaft 16 and have an eccentric portion 32a, respectively, made eccentric with respect to the rotation axis of the support shaft 32. Though not shown, each support shaft 32 is hindered from angularly rotating about its rotation axis by a suitable stopper such as a lock screw.
- Each oscillator 34 has a shape of an oscillating lever and is supported on the corresponding eccentric portion 32a so as to oscillate. Both oscillators 34 extend from the sides of the slider 38 in the opposite direction to each other.
- the connection 36 is connected at its upper end portion with the eccentric portion of the crankshaft so as to move pivotally (that is, connected pivotally).
- Each slider 38 is located below the crankshaft and is disposed so as to move vertically on a guide portion 42 formed in the frame 14, and is prevented from moving horizontally.
- Each guide portion 42 in the illustrated example, is a guide hole extending vertically.
- One end portions of both oscillating levers 32 and the lower end portion of the connection 36 are connected with each other and with the slider 38 by a pivot 44.
- Each connecting link 40 is connected with a part of the oscillator 34 between the support shaft 32 and the pivot 44 by a pivot 46, and is connected at its lower end portion with the upper end of the plunger 22 by a pivot 48.
- the press machine 10 also comprises a balancer 50 for balancing unbalanced force attributable to vertical motion of the slide 20.
- the balancer 50 includes: a balancing weight 52 disposed, above the crankshaft 16 and both oscillators 34, on the frame 14 so as to move vertically; a plurality of guide portions 54 for restricting reciprocal motion of the balancing weight 52 to the vertical direction; and a pair of connecting pieces or connectors 56 individually corresponding to the oscillators.
- Each connector 56 is connected at its lower end portion with the corresponding oscillator 34 by a pivot 58 and connected at its upper end portion with the balancing weight 52 by a pivot 60.
- the reciprocal motion of the balancing weight 52 can be restricted to the vertical direction by using one or more guide portions 54.
- the pivot connecting point of the oscillator 34 and the connecting link 40 by the pivot 46 and the pivot connecting point of the oscillator 34 and the connector 56 by the pivot 48 are at symmetrical positions with respect to the pivot connecting point of the oscillator 34 with the support shaft 32.
- Pivots 44, 46, 48, 558, 60, etc., pivotally connecting or supporting a plurality of members extend horizontally in parallel to the rotation axis of the crankshaft 16. Therefore, pivotal motion of the members mutually connected by each pivot or the members supported by each pivot is a motion about a horizontal extending axis.
- connection 32 and the slider 36 are reciprocated vertically with the rotation of the crankshaft 16 to oscillate both oscillators 34 synchronously and vertically move both connecting links 40 synchronously.
- the slide 20 is vertically reciprocated.
- the pivot connecting point of the oscillator 34 and the connecting link 40 is positioned between the pivot connecting point of the oscillator 34 and the support shaft 32 and the pivot connecting point of the oscillator 34 and the connection 36, the power to be transmitted to the slide 20 is increased, and the press machine 10 functions as a power press machine. Also, since reciprocation of the slider 36 is regulated to the vertical direction by the guide portions 42, oscillation of both oscillators 34 correctly synchronizes, thereby surely preventing horizontal oscillation of the slide 20 and the balancing weight 52.
- both connectors 56 are vertically moved synchronously, so that the balancing weight 52 is reciprocated vertically, following the oscillation of both oscillators 34. At this time, the reciprocation of the balancing weight 52 is restricted to vertical reciprocation by the guide portions 54.
- the balancing weight 52 is moved vertically by a phase difference of 180° with respect to the vertical motion of the slide 20 so as to be downward when the slide 20 is moved upward and to be upward when the slide 20 is moved downward. Therefore, unbalanced force attributable to the vertical motion of the slide 20 is offset by the balancing weight 52.
- the support shaft 32 can be manually rotated after releasing the rotation with respect to the frame 14 stopped by the stopper.
- Fig. 6 shows changes of the strokes L 1 and L 2 of the slide 22 with respect to the stroke L 0 of the connection 36 at the time when the support shaft 32 is angularly rotated to the position shown in (A) and the position shown in (B).
- the eccentric radius "r" shows the amount of eccentricity of the eccentric portion 32a with respect to the rotation axis of the support shaft 32
- the reference numeral 62 shows the axis of the eccentric portion 32a.
- the stroke length can be changed without angularly rotating the crankshaft 16 with respect to the power transmission 30, and eve if the stroke length is changed, the rotation phase of the crankshaft 16 is not displaced.
- the balancer 50 is provided, but it is not necessary to do so like the press machine 70 shown in Fig. 7. Also, while two sets of the support shaft 32, the oscillator 34, the connecting link 40 and the connector 56 are employed, it is possible to employ one set of the support shaft 32, the oscillator 34, the connecting link 40 and the connector 56.
- the present invention is not limited to the above embodiments.
- the present invention can be variously modified without departing from its spirit.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
Description
- The present invention relates to a press machine which transmits power from a crankshaft supported on a frame to a slide by a power transmission.
- As one of power press machines for transmitting rotary power of a crankshaft to a slide by magnifying it with a power mechanism, there is disclosed one provided with a stroke adjusting mechanism for adjusting a stroke length of the slide (Japanese Patent Appln. Publication Nos. 51-12150 and 53-22305).
- Since the above-mentioned prior art is of such a constitution as to adjust a stroke length of the slide by adjusting the relative rotation angle between a power transmission and a crankshaft, there are many parts particularly of the stroke adjusting mechanism, which complicates the structure of the stroke adjusting mechanism and requires much cost.
- Further, in such a press machine, when a stroke length is changed, a rotation phase of the crankshaft is shifted with respect to a phase for feeding material by a material feeder, so that, every time the stroke length is adjusted, the timing for material feeding by the material feeder should be adjusted.
- It is an object of the present invention to simplify a stroke length adjusting mechanism and not to make rotation phase of a crankshaft displace even when the stroke length is changed.
- The press machine according to the present invention comprises: a frame, a crankshaft disposed on the frame so as to rotate about a horizontally extending axis, a slide disposed on the frame so as to move vertically, and a power transmission for transmitting rotation of the crankshaft to the slide.
- The power transmission includes: a support shaft supported on the frame so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft and having an eccentric portion; an oscillator supported on the eccentric portion of the support shaft so as to oscillate or swing; a connection for connecting the oscillator with the eccentric portion of the crankshaft so as to oscillate with rotation of the crankshaft; and a connecting link pivotally connected with the oscillator and the slide so as to have the slide perform vertical motion.
- The eccentric portion of the support shaft acts as a fulcrum for oscillation of the oscillator connected therewith. When the crankshaft is rotated, the connection is reciprocated, thereby oscillating the oscillator about the eccentric portion of the support shaft. The oscillation of the oscillator is a motion about a horizontally extending axis and is transmitted to the slide by the connecting link. This makes the slide move vertically.
- When the support shaft is rotated at a suitable angle independently of rotation of the crankshaft, the direction of eccentricity is rotated by the same value as the amount of the angular rotation of the support shaft, whereby the magnitude of the oscillation angle of the oscillator with reciprocation of the connection is changed, and the stroke length of the slide is changed. Consequently, the stroke length can be changed without angularly rotating the crankshaft with respect to the power transmission, and, therefore, even if the stroke length is changed, the rotation phase of the crankshaft is not displaced.
- As mentioned above, according to the present invention with such a constitution as to adjust the stroke length by having the oscillator supported on the eccentric portion of the support shaft and having the support shaft rotate angularly, the stroke length adjusting mechanism is simplified, and the rotation phase of the crankshaft is not displaced even if the stroke length is changed.
- The press machine can further comprise a slider disposed on the frame so as to move vertically and pivotally connected with the oscillator and the connection.
- The oscillator can extend from a connecting portion with the connection to a connecting portion with the support shaft through a connecting portion with the connecting link. By this, since a connecting point of the oscillator with the slide is positioned between a connecting point of the oscillator with the connection and a connecting point of the oscillator with the support shaft, power to be transmitted to the slide is increased, so that the press machine functions as a power press machine.
- The power transmission can further include: a second support shaft supported on the frame so as to angularly rotate about an axis parallel to the rotation axis of the crankshaft and having a second eccentric portion; a second oscillator supported on the second eccentric portion so as to oscillate and pivotally connected with the connection so as to oscillate with rotation of the crankshaft; and a second connecting link pivotally connected with the second oscillator and the slide so as to have the slide perform vertical motion with the oscillation of the second oscillator. By this, since two sets of the support shaft, the oscillator and the connecting link are provided, the press machine makes stable action.
- The press machine can further comprise: a balancing weight disposed on the frame so as to move vertically; and a connector for connecting the balancing weight with the oscillator so as to have the balancing weight perform vertical motion at a phase difference of 180° with respect to vertical motion of the slide. This makes the vertical motion of the slide and the balancing weight opposite to offset unbalanced force attributable to the vertical motion of the slide and the balancing weight.
- In the preferred embodiments, the balancing weight is disposed above the crankshaft and the oscillator, and the oscillator extends from the connecting portion with the connection to the connecting portion with the connector through the connecting portion with the connecting link and the connecting portion with the support shaft in this order. The power transmission further includes: a second support shaft supported on the frame so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft and having an eccentric portion; a second oscillator supported on the eccentric portion of the support shaft so as to oscillate and pivotally connected with the connection so as to oscillate with rotation of the crankshaft; and a second connecting link pivotally connected with the second oscillator and the slide so as to have the slide perform vertical motion with oscillation of the second oscillator.
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- Fig. 1 is a partially sectioned front elevation showing one embodiment of the press machine according to the present invention.
- Fig. 2 is an enlarged section view of a neighboring portion of the power transmission and the balancer of the press machine in Fig. 1.
- Fig. 3 is an enlarged section view taken along the line 3-3 in Fig. 1.
- Fig. 4 is an enlarged section view taken along the line 4-4 in Fig. 1.
- Fig. 5 is an enlarged section view taken along the line 5-5 in Fig. 1.
- Fig. 6 is a view for explaining a stroke adjustment in the press machine shown in Fig. 1.
- Fig. 7 is a section view similar to Fig. 2, showing another embodiment of the press machine according to the present invention.
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- Referring to Figs. 1 through 5, the
press machine 10 comprises alower frame 12 for mounting a drag and anupper frame 14 supported on thelower frame 12. Acrankshaft 16 is supported on theupper frame 14 so as to rotate about a horizontally extending axis and receives rotation of aflywheel 18 shown in Fig. 3. Theflywheel 18 is rotated by a motor not shown such as an electric motor. - A so-called
slide 20 supporting the cope is assembled into the lower ends of a pair of connecting rods, i.e.,plungers 22 which extend through the lower end portion of theupper frame 14 so as to move vertically. Bothplungers 22 extend upward in parallel from both end portions of theslide 20 and are reciprocated vertically by apower transmission 30 with rotation of thecrankshaft 16. This makes theslide 20 reciprocate in the vertical direction. - The
power transmission 30 includes: a pair ofsupport shafts 32 supported on theframe 14 so as to rotate angularly about an axis parallel to the rotation axis of the crankshaft; anoscillator 34 supported on eachsupport shaft 32 so as to oscillate, i.e., swing; aconnection 36 for connecting bothoscillators 34 with thecrankshaft 16 so as to have bothoscillators 34 oscillate synchronously with rotation of thecrankshaft 16; a pair ofsliders 38 disposed on theframe 14 so as to move vertically; and a connectinglink 40 for connecting theoscillator 34 with theslide 20 so as to move theslide 20 vertically with oscillation of theoscillator 34. - The
support shafts 32 extend horizontally in parallel at an interval in a direction to intersect the rotation axis of thecrankshaft 16 and have aneccentric portion 32a, respectively, made eccentric with respect to the rotation axis of thesupport shaft 32. Though not shown, eachsupport shaft 32 is hindered from angularly rotating about its rotation axis by a suitable stopper such as a lock screw. - Each
oscillator 34 has a shape of an oscillating lever and is supported on the correspondingeccentric portion 32a so as to oscillate. Bothoscillators 34 extend from the sides of theslider 38 in the opposite direction to each other. Theconnection 36 is connected at its upper end portion with the eccentric portion of the crankshaft so as to move pivotally (that is, connected pivotally). - Each
slider 38 is located below the crankshaft and is disposed so as to move vertically on aguide portion 42 formed in theframe 14, and is prevented from moving horizontally. Eachguide portion 42, in the illustrated example, is a guide hole extending vertically. One end portions of both oscillatinglevers 32 and the lower end portion of theconnection 36 are connected with each other and with theslider 38 by apivot 44. - Each connecting
link 40 is connected with a part of theoscillator 34 between thesupport shaft 32 and thepivot 44 by apivot 46, and is connected at its lower end portion with the upper end of theplunger 22 by apivot 48. - The
press machine 10 also comprises abalancer 50 for balancing unbalanced force attributable to vertical motion of theslide 20. Thebalancer 50 includes: a balancingweight 52 disposed, above thecrankshaft 16 and bothoscillators 34, on theframe 14 so as to move vertically; a plurality ofguide portions 54 for restricting reciprocal motion of the balancingweight 52 to the vertical direction; and a pair of connecting pieces orconnectors 56 individually corresponding to the oscillators. - Each
connector 56 is connected at its lower end portion with thecorresponding oscillator 34 by apivot 58 and connected at its upper end portion with the balancingweight 52 by apivot 60. The reciprocal motion of the balancingweight 52 can be restricted to the vertical direction by using one ormore guide portions 54. - The pivot connecting point of the
oscillator 34 and the connectinglink 40 by thepivot 46 and the pivot connecting point of theoscillator 34 and theconnector 56 by thepivot 48 are at symmetrical positions with respect to the pivot connecting point of theoscillator 34 with thesupport shaft 32. -
Pivots crankshaft 16. Therefore, pivotal motion of the members mutually connected by each pivot or the members supported by each pivot is a motion about a horizontal extending axis. - When rotation of the
flywheel 18 is transmitted to thecrankshaft 16, theconnection 32 and theslider 36 are reciprocated vertically with the rotation of thecrankshaft 16 to oscillate bothoscillators 34 synchronously and vertically move both connectinglinks 40 synchronously. Thereby, theslide 20 is vertically reciprocated. - Since the pivot connecting point of the
oscillator 34 and the connectinglink 40 is positioned between the pivot connecting point of theoscillator 34 and thesupport shaft 32 and the pivot connecting point of theoscillator 34 and theconnection 36, the power to be transmitted to theslide 20 is increased, and thepress machine 10 functions as a power press machine. Also, since reciprocation of theslider 36 is regulated to the vertical direction by theguide portions 42, oscillation of bothoscillators 34 correctly synchronizes, thereby surely preventing horizontal oscillation of theslide 20 and the balancingweight 52. - When both
oscillators 34 are oscillated, bothconnectors 56 are vertically moved synchronously, so that the balancingweight 52 is reciprocated vertically, following the oscillation of bothoscillators 34. At this time, the reciprocation of the balancingweight 52 is restricted to vertical reciprocation by theguide portions 54. - In the
press machine 10, since the pivot connecting point of theoscillator 34 and theconnector 56 and the pivot connecting point of theoscillator 34 and the connectinglink 40 are at symmetrical positions with respect to thesupport shaft 32, the balancingweight 52 is moved vertically by a phase difference of 180° with respect to the vertical motion of theslide 20 so as to be downward when theslide 20 is moved upward and to be upward when theslide 20 is moved downward. Therefore, unbalanced force attributable to the vertical motion of theslide 20 is offset by the balancingweight 52. - Independently of rotation of the crankshaft, when both
support shafts 32 are rotated in the opposite directions by the same angle, the direction of eccentricity of theeccentric portion 32a is turned in the opposite direction by the same value as the amount of the angular rotation of thesupport shafts 32, so that the magnitude of the oscillating angle of theoscillator 34 with reciprocation of theconnection 36 is changed, thereby changing the stroke length of theslide 20. - The
support shaft 32 can be manually rotated after releasing the rotation with respect to theframe 14 stopped by the stopper. - Fig. 6 shows changes of the strokes L1 and L2 of the
slide 22 with respect to the stroke L0 of theconnection 36 at the time when thesupport shaft 32 is angularly rotated to the position shown in (A) and the position shown in (B). The eccentric radius "r" shows the amount of eccentricity of theeccentric portion 32a with respect to the rotation axis of thesupport shaft 32, and thereference numeral 62 shows the axis of theeccentric portion 32a. - As apparent from Fig. 6, by angularly rotating the
support shaft 32, the stroke of theslide 20 changes from L1 to L2 or vice versa. However, even if the stroke of theslide 20 changes like this, there is no relative change between the phase of vertical movement of theslide 20 and the phase of vertical movement of theconnection 36. - Consequently, in the
press machine 10, the stroke length can be changed without angularly rotating thecrankshaft 16 with respect to thepower transmission 30, and eve if the stroke length is changed, the rotation phase of thecrankshaft 16 is not displaced. - As mentioned above, if two sets of the
support shaft 32, theoscillator 34, the connectinglink 40 and theconnector 56 are employed, reciprocation of theslide 20 and the balancingweight 52 is stabilized. In particular, by arranging those sets symmetrically with respect to an axis 64, disposing the balancingweight 52 above thecrankshaft 16 and theoscillator 34 symmetrically with respect to the axis 64, connecting the horizontal lower side of both end portions of the balancingweight 52 with theoscillator 34, reciprocation of the slide and the balancingweight 52 is stabilized. - In the foregoing embodiment, the
balancer 50 is provided, but it is not necessary to do so like thepress machine 70 shown in Fig. 7. Also, while two sets of thesupport shaft 32, theoscillator 34, the connectinglink 40 and theconnector 56 are employed, it is possible to employ one set of thesupport shaft 32, theoscillator 34, the connectinglink 40 and theconnector 56. - Also, in the foregoing embodiment, instead of rotating the
support shafts 32 one by one, it is possible to provide a mechanism for rotating bothsupport shafts 32 simultaneously by the same amount. - The present invention is not limited to the above embodiments. The present invention can be variously modified without departing from its spirit.
Claims (6)
- A press machine comprising: a frame (14); a crankshaft (16) disposed on said frame so as to rotate about a horizontally extending axis; a slide (20) disposed on said frame so as to move vertically; and a power transmission (30) for transmitting rotation of said crankshaft to said slide;wherein said power transmission (30) includes: a support shaft (32) supported on said frame so as to rotate angularly about an axis parallel to the rotation axis of said crankshaft and having an eccentric portion; an oscillator (34) supported on said eccentric portion of said support shaft so as to oscillate; a connection (36) for connecting said oscillator with the eccentric portion of said crankshaft so as to oscillate said oscillator with rotation of said crankshaft; and a connecting link (40) pivotally connected with said oscillator and said slide so as to have said slide perform vertical motion.
- A press machine as defined in claim 1, further comprising a slider (38) disposed on said frame (14) so as to move vertically and pivotally connected with said oscillator and said connection (36).
- A press machine as defined in claim 1 or 2, wherein said oscillator (34) extends from a connecting portion with said connection (36) to a connecting portion with said support shaft (32) through a connecting portion with said connecting link (40).
- A press machine as defined in any one of claims 1 through 3, wherein said power transmission (30) further includes: a second support shaft (32) supported on said frame (14) so as to rotate angularly about an axis parallel to the rotation axis of said crankshaft (16) and having a second eccentric portion; a second oscillator (34) supported on said second eccentric potion so as to oscillate and pivotally connected with said connection (36) so as to oscillate with rotation of said crankshaft; and a second connecting link (40) pivotally connected with said second oscillator and said slide (20) so as to have said slide perform vertical motion with oscillation of said second oscillator.
- A press machine as defined in any one of claims 1 to 4, further comprising: a balancing weight (52) disposed on said frame (14) so as to move vertically; and a connector (56) for connecting said balancing weight with said oscillator (34) so as to have said balancing weight perform vertical motion at a phase difference of 180° with respect to the vertical motion of said slide (20).
- A press machine as defined in claim 5, wherein said balancing weight (52) is disposed above said crankshaft (16) and said oscillator (34),wherein said oscillator (34) extends from a connecting portion with said connection (36) to a connecting portion with said connector through a connecting portion with said connecting link (40) and a connecting portion with said support shaft (32) in this order, andwherein said power transmission (30) further includes: a second support shaft (32) supported on said frame (14) so as to rotate angularly about an axis parallel to the rotation axis of said crankshaft (16) and having a second eccentric portion; a second oscillator supported on said second eccentric portion so as to oscillate and pivotally connected with said connection so as to oscillate with rotation of said crankshaft; and a second connecting link (40) pivotally connected with said second oscillator and said slide (20) so as to have said slide perform vertical motion with oscillation of said second oscillator.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000345162 | 2000-11-13 | ||
JP2000345162A JP3667227B2 (en) | 2000-11-13 | 2000-11-13 | Press machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1207039A2 true EP1207039A2 (en) | 2002-05-22 |
EP1207039A3 EP1207039A3 (en) | 2003-01-15 |
EP1207039B1 EP1207039B1 (en) | 2009-05-06 |
Family
ID=18819242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010126868 Expired - Lifetime EP1207039B1 (en) | 2000-11-13 | 2001-11-12 | Press machine |
Country Status (3)
Country | Link |
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EP (1) | EP1207039B1 (en) |
JP (1) | JP3667227B2 (en) |
DE (1) | DE60138600D1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004015851B4 (en) * | 2003-04-01 | 2008-12-18 | Kabushiki Kaisha Yamada Dobby, Bisai | Press |
EP2969511A4 (en) * | 2013-03-12 | 2017-03-08 | Vamco International, Inc. | Press machine |
WO2017066388A1 (en) * | 2015-10-14 | 2017-04-20 | Vamco International, Inc. | Apparatus and method for adjusting the stroke length of a movable member |
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Publication number | Priority date | Publication date | Assignee | Title |
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EP2008799A1 (en) * | 2007-06-28 | 2008-12-31 | Bruderer Ag | Die cutting press |
JP5412185B2 (en) * | 2009-06-22 | 2014-02-12 | 株式会社山田ドビー | Press machine |
CN106273607B (en) * | 2016-10-31 | 2017-12-08 | 南京工程学院 | A kind of two point multi-link lever press drive mechanism |
RU192634U1 (en) * | 2019-06-17 | 2019-09-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет", ФГБОУ ВО "СибГИУ" | CRANK-SLIDER PRESS MECHANISM |
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CH541418A (en) * | 1971-08-04 | 1973-09-15 | Maschb Ing O Klammer | Method and device for adjusting the position of the ram stroke in presses |
US3765266A (en) * | 1971-10-01 | 1973-10-16 | Bruderer Ag | Apparatus for changing the operating stroke of a punch press |
GB1502192A (en) * | 1974-09-03 | 1978-02-22 | Bruderer Ag | Drive for the movable work component of a machine such as the ram of a press stamping machine or the like |
DE2900901A1 (en) * | 1979-01-11 | 1980-07-17 | Raster Werkzeugmasch Rwm | Eccentric press with toggle linkage - has connecting rod system on eccentric shaft with additional eccentric cam for quick lifting of ram |
US5746123A (en) * | 1995-01-21 | 1998-05-05 | Bruderer Ag | Punch press having an elongate space for mounting its tools |
JPH11179598A (en) * | 1997-12-15 | 1999-07-06 | Aida Eng Ltd | Compact, high-speed and automatic press |
-
2000
- 2000-11-13 JP JP2000345162A patent/JP3667227B2/en not_active Expired - Lifetime
-
2001
- 2001-11-12 DE DE60138600T patent/DE60138600D1/en not_active Expired - Lifetime
- 2001-11-12 EP EP20010126868 patent/EP1207039B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH541418A (en) * | 1971-08-04 | 1973-09-15 | Maschb Ing O Klammer | Method and device for adjusting the position of the ram stroke in presses |
US3765266A (en) * | 1971-10-01 | 1973-10-16 | Bruderer Ag | Apparatus for changing the operating stroke of a punch press |
GB1502192A (en) * | 1974-09-03 | 1978-02-22 | Bruderer Ag | Drive for the movable work component of a machine such as the ram of a press stamping machine or the like |
DE2900901A1 (en) * | 1979-01-11 | 1980-07-17 | Raster Werkzeugmasch Rwm | Eccentric press with toggle linkage - has connecting rod system on eccentric shaft with additional eccentric cam for quick lifting of ram |
US5746123A (en) * | 1995-01-21 | 1998-05-05 | Bruderer Ag | Punch press having an elongate space for mounting its tools |
JPH11179598A (en) * | 1997-12-15 | 1999-07-06 | Aida Eng Ltd | Compact, high-speed and automatic press |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12, 29 October 1999 (1999-10-29) & JP 11 179598 A (AIDA ENG LTD), 6 July 1999 (1999-07-06) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004015851B4 (en) * | 2003-04-01 | 2008-12-18 | Kabushiki Kaisha Yamada Dobby, Bisai | Press |
EP2969511A4 (en) * | 2013-03-12 | 2017-03-08 | Vamco International, Inc. | Press machine |
US9701084B2 (en) | 2013-03-12 | 2017-07-11 | Vamco International, Inc. | Press machine |
US9724889B2 (en) | 2013-03-12 | 2017-08-08 | Vamco International, Inc. | Press machine |
WO2017066388A1 (en) * | 2015-10-14 | 2017-04-20 | Vamco International, Inc. | Apparatus and method for adjusting the stroke length of a movable member |
Also Published As
Publication number | Publication date |
---|---|
DE60138600D1 (en) | 2009-06-18 |
JP2002144096A (en) | 2002-05-21 |
EP1207039A3 (en) | 2003-01-15 |
EP1207039B1 (en) | 2009-05-06 |
JP3667227B2 (en) | 2005-07-06 |
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