US3508451A - Driving mechanism for slide in a press - Google Patents

Driving mechanism for slide in a press Download PDF

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Publication number
US3508451A
US3508451A US751504A US3508451DA US3508451A US 3508451 A US3508451 A US 3508451A US 751504 A US751504 A US 751504A US 3508451D A US3508451D A US 3508451DA US 3508451 A US3508451 A US 3508451A
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US
United States
Prior art keywords
slide
press
main
crank shaft
gear
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
Application number
US751504A
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English (en)
Inventor
Sukenao Yoshida
Kohji Nakano
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.)
AIDA TEKKOSHO KK
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AIDA TEKKOSHO KK
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 AIDA TEKKOSHO KK filed Critical AIDA TEKKOSHO KK
Application granted granted Critical
Publication of US3508451A publication Critical patent/US3508451A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B30B1/266—Drive systems for the cam, eccentric or crank axis

Definitions

  • a driving mechanism for the'slide in a press comprising a slide driving main gear freely mounted on a maincrank shaft journalled in the frame of said press, a drive gear fixedlymounted on a main drive shaft and in engagement with said main gear, an auxiliary crank shaft journalled in said main gear, a planetary gear fixedly mounted on said auxiliary crank shaft and a sun gear fixedly supported in said frame in a concentric relation to said main crank shaft and in engagement with said planetary gear, said auxiliary crank shaft having a crank pin which is connected through a link to the fixed arm of said main crank shaft.
  • the material drawing rate by such a prior art press is inevitablylimited within a relatively low value range.
  • the prior art press has to be necessarily so designed that the number of strokes of the slide per minute is determined depending upon the length of the stroke of the slide movement in a cycle of operation and the number of strokes of the slide per minute is increased only by causing the slide to move describing a non-cosine curve in which the velocity of the slide is increased both in a stroke portion descending from the upper dead point to a point adjacent to the middle in .its descending strokeand in the non-productive stroke portion ascending from the lower dead point to the upper dead point.
  • the present invention relates to an improved driving mechanism for the slide in a press and more particularly, to an improved driving mechanism for the slide in a press for sheet metal in which the driving mechanism drives the slide toward a material to be processed at a high velocity and also to return the slide at a similarly high velocity after the performance of processing upon the material by the die carried in the slide at a low rate.
  • One object of the present invention is to provide an improved driving mechanism for the slide in a press whereby the number of strokes of the slide per minute can :be substantially-increased while maintaining the prtfcessing rate of the press at a predetermined constant va ue.
  • Another object of the present invention is to provide an improved driving mechanism for the slide in a press whereby the setting of various different stroke lengths can be more easily made as compared with the setting by the prior art quick returning mechanism.
  • a further object of the present invention is to provide a simplified and compact driving mechanism for the slide in a press.
  • a driving mechanism'for the slide in a press comprising a main crank shaft rotatably journalled in the frame of said press for driving said slide, a main gear freely mounted on said main crank shaft, a driving shaft journalled in said frame and having a fixed drive gear in engagement with said main gear for driving the latter, an auxiliary crank shaft journalled in said mean gear, a planetary gearfixedy mounted on said auxiliary crank shaft and a' sun gear fixedly supported in said frame in a concentric. relation with said main crank shaft for engagement with said planetary gear, a crank pin of said auxiliary crank shaft being connected by means of a link to a fixed arm of said main crank shaft.
  • FIG. 1 is a graph which compares the novel slide driving mechanism with a prior art slide driving mech anism by graphically showing the curves of the slide displacement and velocity characteristics obtained by both the novel and prior art slide driving mechanisms respectively;
  • FIG. 2 is a fragmentary vertical section view of essential parts of a preferred form of press slide driving mechanism constructed in accordance with the present invention showing a portion thereof in section taken along the line 11-11 of FIG. 3;
  • FIG. 3 is a cross-section view taken along the line III'III of FIG. 2.
  • the press generally comprises a machine frame 1 in which a main crank shaft 2 is rotatably mounted in a conventional manner by means of conventional bearings and the crank shaft has a crank pin 2' which is connected through a conventional connecting rod 3 to a conventional slide S which carries die therein (not shown) in a conventional manner.
  • the crank shaft 2 further has an arm 4 connected thereto by means of a spline arrangement as shown at 4. The free end of the arm 4 has one end of a link 6.
  • tary gear 8 is shown as being separated from the sun gear 9 for clarification of showing in FIG. 2).
  • a drive pinion 11 is fixedly mounted on one end of a main drive shaft 12 and the pinion is in engagement with the main gear 10.
  • the drive shaft 12 is adapted to be driven from a conventional driving source (not shown) through a pulley 12 and a clutch (not shown) mounted on the other end of the shaft 12.
  • the drive shaft 12 is adapted to rotate at a predetermined constant rate as the driving source is operated and 3 accordingly, the drive shaft 12 actuates to rotate the main gear 10 by virtue of the engagement between the pinion 1 1 and main gear 10..
  • the planetary gear 8 rotates about its own axis while revolving about the, sun gear 9 by virtue of the engagement between the-planetary and sun gears.
  • the plane: tary gear 8 completes about its axis two rotations each time the main gear '10 completes about its own axis" one rotation.
  • the auxiliary crank-shaft 7 connected to the shaft 8 of the planetary gear 8 completes about its axis two rotations, each time the main gear 10 completes about its axis one rotation.
  • the auxiliary crank shaft 7 rotates atthe equi-angular rate.
  • this equiangular rotational movement of the auxiliary crank shaft 7 is considered from the axisof the main crank shaft- 2,. since the rotational movement of the auxiliary crank shaft 7 is transmittedthroughthelink 6, pin and the arm 4 of the main crank shaft 2. to the main crank shaft,.the equi-angular rotational movement of the auxiliary crank shaft 7 comes to appear as an equiangular rotational movement added a crank lever movement of the so-called quadribar mechanism.
  • FIG. 1 comparatively shows the displacement and velocity characteristics of the slide which are obtained by the slide driving mechanism of the present invention and those of the slide which are obtained by a prior art slide driving.
  • the period of non-productive or dle time in a cycle that is, the time period during which he press performs non-productive operation is substan- :ially shorter than that in a cycle of operation by the )ress which employs the prior art crank mechanism as he driving means for the slide.
  • the press can be operated at a slower irawi ng rate according to the present invention.
  • the present invention is, therefore, to eliminate the lifiiculty inherent in the prior art press or press system nentioned just above.
  • the slide driving main crank shaft is driven from the main drive shaft through the planetary gearing, auxiliary crank mechanism and link mechanism, and therefore, the time period. of non-productive or idle time in a cycle of operation can be substantially reduced whereby the slide can be displaced and returned at a fasted velocity as compared with the case of the slide movement in a prior artpress resulting in an increase of the number of strokes per minute.
  • a driving mechanism for the slide in a press comprising a main crank 'shaft rotatably journalled in the frame of said press for driving said slide, a main gear freely mounted on said. main crank shaft, a driving shaft journalled in said frame and having a fixed drive gear in engagement with said main gear for driving the latter, an auxiliary crankshaft journalled in said main gear, a planetary gear fixedly mounted on said auxiliary crank shaft and a sun gear fixedly supported in said frame in a concentric relation to said main crank shaft for engagement with said planetary gear, a crank pin of said auxiliary crank shaft being connected by means of a link to a fixed arm of said main crank shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
US751504A 1967-08-11 1968-08-09 Driving mechanism for slide in a press Expired - Lifetime US3508451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5124867 1967-08-11

Publications (1)

Publication Number Publication Date
US3508451A true US3508451A (en) 1970-04-28

Family

ID=12881636

Family Applications (1)

Application Number Title Priority Date Filing Date
US751504A Expired - Lifetime US3508451A (en) 1967-08-11 1968-08-09 Driving mechanism for slide in a press

Country Status (4)

Country Link
US (1) US3508451A (fr)
DE (1) DE1752915C3 (fr)
FR (1) FR1576908A (fr)
GB (1) GB1191036A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931958A (en) * 1973-07-03 1976-01-13 Variable Kinetic Drives, Ltd. Load moving apparatus
EP0107836A1 (fr) * 1982-10-26 1984-05-09 Textilma AG Transmission pour obtenir un mouvement discontinu d'un mouvement continu
WO1993025330A1 (fr) * 1992-06-10 1993-12-23 Sms Hasenclever Gmbh Machine-outil automatique travaillant par formage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109550824B (zh) * 2019-01-25 2020-08-04 安徽远都机床股份有限公司 一种工作稳定的闭式单点压力机
CN114453328A (zh) * 2022-02-04 2022-05-10 武汉乐桐机械制造有限公司 一种3d打印机零部件生产用的清洗设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1190407A (en) * 1913-01-20 1916-07-11 Paul Helmbold Differential feed mechanism for spinning or combing machines.
US1727194A (en) * 1924-09-07 1929-09-03 Belin Edouard Electromagnetic signal transmission
US2655817A (en) * 1950-04-07 1953-10-20 Sarl So Called Soc D Etudes De Mechanism for converting a uniform motion into a variable motion
US3232132A (en) * 1963-07-11 1966-02-01 Shin Mitsubishi Jumogyo Kabush Drive for detaching rollers of a combing machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1190407A (en) * 1913-01-20 1916-07-11 Paul Helmbold Differential feed mechanism for spinning or combing machines.
US1727194A (en) * 1924-09-07 1929-09-03 Belin Edouard Electromagnetic signal transmission
US2655817A (en) * 1950-04-07 1953-10-20 Sarl So Called Soc D Etudes De Mechanism for converting a uniform motion into a variable motion
US3232132A (en) * 1963-07-11 1966-02-01 Shin Mitsubishi Jumogyo Kabush Drive for detaching rollers of a combing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931958A (en) * 1973-07-03 1976-01-13 Variable Kinetic Drives, Ltd. Load moving apparatus
EP0107836A1 (fr) * 1982-10-26 1984-05-09 Textilma AG Transmission pour obtenir un mouvement discontinu d'un mouvement continu
WO1993025330A1 (fr) * 1992-06-10 1993-12-23 Sms Hasenclever Gmbh Machine-outil automatique travaillant par formage
US5619884A (en) * 1992-06-10 1997-04-15 Eumuco-Hasenclever Gmbh Automatic forming machine

Also Published As

Publication number Publication date
DE1752915C3 (de) 1974-03-07
FR1576908A (fr) 1969-08-01
DE1752915A1 (de) 1971-09-30
GB1191036A (en) 1970-05-06
DE1752915B2 (de) 1973-08-09

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