US3177698A - Press die clamping apparatus - Google Patents

Press die clamping apparatus Download PDF

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Publication number
US3177698A
US3177698A US13354561A US3177698A US 3177698 A US3177698 A US 3177698A US 13354561 A US13354561 A US 13354561A US 3177698 A US3177698 A US 3177698A
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Prior art keywords
press
die
slide
bolt
head
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Expired - Lifetime
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Georgeff Vasil
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Danly Machine Specialties Inc
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Danly Machine Specialties Inc
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Priority to US709324A priority Critical patent/US3111100A/en
Application filed by Danly Machine Specialties Inc filed Critical Danly Machine Specialties Inc
Priority to US13354561 priority patent/US3177698A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0063Connecting non-slidable parts of machine tools to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/04Movable or exchangeable mountings for tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/14Particular arrangements for handling and holding in place complete dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026Mounting of dies, platens or press rams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028Loading or unloading of dies, platens or press rams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B2/00Friction-grip releasable fastenings
    • F16B2/02Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/065Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using screw-thread elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B43/00Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • F16B43/02Washers or equivalent devices; Other devices for supporting bolt-heads or nuts with special provisions for engaging surfaces which are not perpendicular to a bolt axis or do not surround the bolt
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00Presses
    • Y10S100/918Bolster and die

Description

V. GEORGEFF' PRESS DIE CLAMPING APPARATUS Original Filed Jan. 16, 1958 April 13, 1965 INVENTOR.
VASH. GEQRGEFF BY ATTORNEYS 3,177,698 PRESS DIE CLAMPEJG APPARATUS Vasil Georgetf, La Grange Park, 111., assignor to Daniy Machine Specialties, Inc, Chicago, 111., a corporation of Illinois Original application Jan. 16, 1958, Ser. No. 709,324, now Patent No. 3,111,?100, dated Nov. '19, 1964. Divided andthis application Aug. 21, 1961, Ser. No. 133,545
5 Claims. (Cl. 72-462) This application is a division of my copending application, Serial No. 709,324, filed January 16, 1958, now US. Patent No. 3,111,100, granted November 19, 1964, for Quick Die Change Press, which is a continuation-in-part of my copending application, Serial No. 604,437, filed August 16, 1956, which issued as US. Patent No. 2,996,- 025 for a Readily Changeable Die Assembly for Power Presses.
My invention relates to a quick die change press and more particularly to a power press having means for changing the press dies in a rapid, convenient, and expeditious manner.
In operation of a power press, one of the most difficult and time-consuming operations which must be performed is changing the press setup when a new part is to be produced on the press. In the course of this changeover, the old dies must be removed from the press and the new dies must be located accurately on the press bed to permit the upper die to be secured to the press slide and to permit the lower die to be secured to the press bed. The labor cost of this operation is high, owing to the high hourly wage rate of skilled die setters. Because of this high cost of changing the press dies, manufacturers make large runs of one part before changing the setup of a press. While this expedient reduces changeover labor costs, it introduces the necessity of storing and handling a very large number of parts. imbalances in the manufacturers inventory result. In the manufacture of consumer goods frequent model changes render obsolete many of the parts previously run, resulting in loss to the manufacturer.
In recent years the metal stamping industry has greatly increased the production rate of presses for producing large stampings. Modern presses are capable of higher over-all speeds with very little corresponding increase in the drawing speeds. In other words, the over-all press speed has been increased without exceeding the critical drawing speed of the metal being worked on. The increased production possible on modern presses has created new problems in manufacturing plants. In order to maintain steady employment, production in many instances must be controlled by the number or lengths of theworking shifts. If long production runs are made, the storage and handling problems referred to hereinabove arise. If relatively short runs are made to maintain the storage of piece parts at normal levels, much production time is lost because of the diiiiculty of changing dies for each new production. run. An obvious solution to the problems outlined hereinabove is the provision of a large number of presses, each using a dilferent set of dies. This solution clearly is an uneconomical one.
Modern presses employ automatic handling equipment for feeding the material to be worked on into the press. In order to change the press dies in the prior art, much of this equipment must be moved to permit removal of the old dies and insertion of the new dies into the press. Each die change usually requires different mechanical handling equipment. i
It has been suggested in the prior art that the dies to be assembled on the press be nested and placed on tracks which are run into the press bed to permit the dies to be secured to the press slide and bed. Such a system has not been practical in the prior art, owing to the difliculty of United States Patent 0 3,177,698 Patented Apr. 13, 1965 ice locating the dies properly and to the difficulty of securing the dies to the press bed and to the press slide. The difli= culty of securing a die to the press drawing slide is par= ticularly evident in a press in which the drawing slide is mounted within a blank holder slide. 1
Another suggestion which has been advanced in the prior art is the'provision of a deformable upper die carried by the press working slide and lower dies which are run into the press and secured to the press bed for cooperation with the deformable upper die. A system of this nature not only has the inherent disadvantage outlined hereinabove of not locating the lower die: properly on the press bed but is completely impractical for the formation of large stampings from sheet steel and similar materials.
I have invented a quick die change press which permits the dies of a press to be changed in a rapid, convenient and expeditious manner. My press includes means for accurately positioning the dies run into the press to permit the dies to be secured respectively to the press inner slide and to the press bed. I provide my assembly with means for rapidly and expeditiously securing the dies to the press bed and to the press slide. My press permits the dies to be changed without the excessively high labor cost i11- curred in changing the dies in presses of the prior art. While, in the prior art, a change in the dies usedon a press requires a minimum of two hours time, my press permits a change to be made in five minutes. In the prior art, for example, for a work week of 120 hours in which five die changes are made only eighty hours is actual production time, while forty hours time is required to change the die setup. With my quick die change press for a work week of 120 hours in which ten die changes are made, actual production time is 115 hours, while the die setup time required is only live hours. It will be seen that for twice the number of die changes production time on my press is increased by thirty-five hours or a percentage increase of 43 /z%. Further, my press results in a corresponding increase in time available for die tryout.
My quick die change press has the further advantage that it eliminates the need for excess press and plant capacity required for die tryout in bringing out new models. My press maintains very nearly the same efiiciency of equipment utilization for short-run production as for longrun production. My presspermits the use of improved handling equipment over that used in the prior art. This mechanical handling equipment need not be removed while dies are being set up. In the event of a breakdown on the press, the die in the press can readily be removed for repairs, and'the press can be put back into production quickly. With my press a die change may be made during a working shift or whenever the required production quantity of the article produced by the dies being used has been reached.
One object of my invention is to provide a press die clamping apparatus which permits an upper die to be secured to the inner slide in a rapid and expeditious manner.
Another object of my invention is to provide a press die clamping apparatus which permits a press die to be secured to the inner slide Without the necessity of inserting a tool through the blank holder slide. 1
Other and further objects of my invention will appear from the following description.
In general my invention contemplates the provision of a quick die change press having a frame and a bed and a drawing slide carried for reciprocation with respect to the bed. My press includes a movable bolster to which I secure the lower die of a pair of dies including an upper die adapted to be secured to the press slide. The frame of my press has openings through which a pair of dies carried by the bolster may be moved from. a location adjacent the press to a position over the press bed. I provide my press with means for accurately positioning the bolster on the drive means for moving respective bolsters carrying pairs of dies and has meansrfor preventing interference between the two bolsters.
In the accompanying drawings which form part of the instant specification and which are to be read in conjunction therewith and in which like reference numerals are used to indicate like parts in the various views:
FIGURE 1 is a sectional view of an alternate form of upper die clamping-means of my quick die change power press.
FIGURE 2 is a plan view of the upper die clamping means of my quick diechange power press taken along the line 2-2 of FIGURE 1-.
FIGURE 3 is a plan view of the form of my upper die clampingmeans shown in FIGURE 1 taken along the line 3-3 of FIGURE 1.
Referring now to FIGURES 1 to 3, I have shown a form of my clamping means which is particularly adapted for use with a press having a blank holder slide. This form of my clamping means obviates the necessity for inserting a tool through the blank holder slide to operate the clamping means. In this form of my clamping means 'a motor 164 carried by the inner slide 56 is adapted to be energized to drive a shaft 166 carrying for rotation with it a pinion 168 disposed in a housing 171?. Pinion 1615 engages and drives a gear 172 carried by a hub 174 rotatably supported on a bushing 176 carried by a shaft 178 supported in housing 176. Hub 174 carries a pinion 180 for rotation with the hub, which pinion 180 engages a gear 182 rotatably supported within the housing 170 on thrust bearings 184 and 186; I form a threaded central bore 188 in gear 182. The threads in bore 188 engage threads 191) formed on the shank of a clamping bolt 192. V
The shank of bolt 192 extends downwardly through a bore 194 formed in the inner slide 56. I form the lower end of bolt 192, as viewed in FIGURE 1, with a head 1% having a generally rectangular cross-sectional shape. I reduce the other end 1915 of bolt 192 along a diameter to form an end having a generally rectangular cross-sectional area, the major axis of which is right angles to the major axis of the cross-sectional area of head 1%,
End 198 extends through an opening 200 formed in the top of housing 170 and provided with a pair of stops 2%12 and 204. The head 1% is adapted to pass through a substantially rectangular opening 2% formed in the flange 152 of the upper die at; As will be explained hereinafter, before the slide 56 is secured to the die 64, motor 164 has been driven to move end 1% and head 1% to the brokenline position shown in FIGURES l and 2. In this position of head 19ti its longitudinal axis is parallel to the longitudinal axis of the cross'section of opening 2% so that as the slide moves down over the upper die, the head 1% moves through opening 2%. When the head 1% has thus been moved through'the opening 2%, motor 164 is energized to rotate the end 198 to the full-line position shown in FIGURES 1 to 3. When the end 198 has been moved to this position, the longitudinal axis of head 1% extends at right angles to the longitudinal axis of the cross section of opening 2%. After end 198 has arrived at the full-line position in which it is against stops 2112 and 264, upon continued rotation of gear 132, bolt 192 is drawn upwardly'to secure the upper die firmly to the slide '56. When the upper die is to be released from the slide, the direction of rotation of motor 164 is reversed to move the bolt head and the end 198m the broken-line position In operation of my press die clamping means to release die 64 from the inner slide 56 I energize motor 16 1 to drive the bolts 192 to bring the end 1% to the broken-line position against stops 2112 and 264. I11 this position of the bolt the inner slide may readily be moved to the top of its stroke, withdrawing the heads 1% through the openings 2% in the upper die. In operation of my clamping apparatus to secure an upper die as to the slide 56 I drive the slide 56 downwardly and in the course of movement of the inner slide 56 downwardly, the heads 1% are in a position at which they enter openings 206. With the slide at the bottom of its stroke I energize motor 16 to rotate the bolts first to a position at which the longitudinal axis of head 15 6 is at right angles to the longitudinal axis of the cross section of 2%. I continue rotation of the motor until the desired clamping pressure has been reached. I may accomplish this, for example, by means of a friction clutch between motor 164 and the gear train for driving the bolts.
It will be seen that I have accomplished the objects of my invention. I have provided a quick die change power press which permits the dies of a press to be changed in a simple, rapid and expeditious manner. My press permits advantage to be taken of the high speed operation of modern power presses without excessive production time being used for die changes. My press includes means for accurately locating dies moved into the press bed in the course of a change in the setup of the press. My press includes simple means for securing the upper die to the press drawing slide. The arrangement of my press is such that dies may be changed without disturbing automatic material handling equipment used with the press.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of my claims. It is further obvious that various changes may be made in details within the scope of my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described. c
Having thus described my invention, what'I claim is:
1. In a power press having a drawing slide and an upper die to be secured to said slide, a securing assembly including means on one of the die and slide forming an opening having a major axis and a minor axis, a clamping bolt mounted on the other of said die and slide for movement therewith and for rotary movement with respect thereto, a head on said bolt, said head having a cross-sectional area with a major axis and a minor axis, said head being adapted to pass through said opening with the head and opening major taxes substantially aligned, drive means adapted to be energized to rotate said bolt, means mounting said drive means on said other of said die and said slide for movement therewith, said rotating means being adapted to draw said bolt into the other of the die and slide after rotation of the bolt has been arrested.
2. In a power press having a drawing slide andan upper die to be secured to said slide, a securing assembly including means on said. upper. die forming an opening having a major axis and a minor axis, a clamping bolt' 7 through said opening with the head and opening major axes substantially aligned, drive means adapted to be energized to rotate said bolt, means mounting said drive I means on said slide for movement therewith, means for limiting the rotation of said bolt when said major axes are appreciably out of alignment, said drive means being adapted to draw said bolt into said slide upon continued operation after rotation of said bolt has been arrested.
3. A securing assembly as in claim 2 in which said bolt includes a shank formed with threads, said means for rotating including a gear formed With a threaded bore, said shank being disposed in said bore.
4. A securing assembly as in claim 2 in which the end of said bolt remote from said head is formed with a cross section having a major axis substantially at right angles to the axis of said head, means forming an opening in which said end is disposed, said opening being formed with stops for limiting the rotation of said bolt.
5. A securing assembly as in claim 2 in which said bolt includes a shank formed with threads, said means for rotating comprising a worm gear formed with a threaded bore, said shank being disposed in said bore, and a Worm for driving said gear.
References Cited by the Examiner UNITED STATES PATENTS CHARLES W. LANHAM, Primary Examiner.
15 NEDWIN BERGER, WILLIAM J.
Machin 292-256.73 Gros 113-33 Cannon 11338 Byerlein 100-295 Lyon 113-49 Sugg 1818 Annicq 11349 Sommer et a1 11349 Sommer 100-495 STEPHENSON,
Examiners.

Claims (1)

1. IN A POWER PRESS HAVING A DRAWING SLIDE AND AN UPPER DIE TO BE SECURED TO SAID SLIDE, A SECURING ASSEMBLY INCLUDING MEANS ON ONE OF THE DIE AND SLIDE FORMING AN OPENING HAVING A MAJOR AXIS AND A MINOR AXIS, A CLAMPING BOLT MOUNTED ON THE OTHER OF SAID DIE AND SLIDE FOR MOVEMENT THEREWITH AND FOR ROTARY MOVEMENT WITH RESPECT THERETO, A HEAD ON SAID BOLT, SAID HEAD HAVING A CROSS-SECTIONAL AREA WITH A MAJOR AXIS AND A MINOR AXIS, SAID HEAD BEING ADAPTED TO PASS THROUGH SAID OPENING WITH THE HEAD AND OPENING MAJOR AXES SUBSTANTIALLY ALIGNED DRIVE MEANS ADAPTED TO BE ENERGIZED TO ROTATE SAID BOLT, MEANS MOUNTING SAID DRIVE MEANS ON SAID OTHER OF SAID DIE AND SAID SLIDE FOR MOVEMENT THEREWITH, SAID ROTATING MEANS BEING ADAPTED TO DRAW SAID BOLT INTO THE
US13354561 1958-01-16 1961-08-21 Press die clamping apparatus Expired - Lifetime US3177698A (en)

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US709324A US3111100A (en) 1958-01-16 1958-01-16 Quick die change press
US13354561 US3177698A (en) 1958-01-16 1961-08-21 Press die clamping apparatus

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DE29507426U1 (en) * 1995-05-04 1995-06-29 Deckel Maho Gmbh Device for releasably attaching a milling head to a spindle housing
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US11344939B2 (en) * 2016-06-22 2022-05-31 Theodor Gräbener GmbH & Co. KG Device for calibrating and straightening hollow components and method using such a device
EP3300809A1 (en) * 2016-09-28 2018-04-04 Primetals Technologies France SAS Facility and method for levelling a metal product
CN106827646B (en) * 2017-03-22 2019-01-11 尚鳌自动化工程(上海)有限公司 A kind of mold quick switching mechanism and its switching method
CN107838299B (en) * 2017-10-25 2019-11-08 合肥常青机械股份有限公司 A kind of quick die changing tool

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US1607074A (en) * 1923-08-27 1926-11-16 Western Electric Co Forming mechanism
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EP0170109A2 (en) * 1984-08-01 1986-02-05 PIRELLI COORDINAMENTO PNEUMATICI Società per Azioni Improvements made to tyre-vulcanizing moulds
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Also Published As

Publication number Publication date
GB916143A (en) 1963-01-23
DE1402540A1 (en) 1969-07-03
US3111100A (en) 1963-11-19
DE1402540C3 (en) 1973-01-04
DE1627900A1 (en) 1971-07-22
FR1222622A (en) 1960-06-10
GB916142A (en) 1963-01-23

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