GB1603255A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1603255A – Quick chucking die holder device for forging presses
– Google Patents

GB1603255A – Quick chucking die holder device for forging presses
– Google Patents
Quick chucking die holder device for forging presses

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Publication number
GB1603255A

GB1603255A
GB13642/78A
GB1364278A
GB1603255A
GB 1603255 A
GB1603255 A
GB 1603255A
GB 13642/78 A
GB13642/78 A
GB 13642/78A
GB 1364278 A
GB1364278 A
GB 1364278A
GB 1603255 A
GB1603255 A
GB 1603255A
Authority
GB
United Kingdom
Prior art keywords
wedges
retracting
chucking
die holder
die
Prior art date
1977-04-09
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

Application number
GB13642/78A
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.)

FELLNER G

Original Assignee
FELLNER G
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.)
1977-04-09
Filing date
1978-04-07
Publication date
1981-11-25

1978-04-07
Application filed by FELLNER G
filed
Critical
FELLNER G

1981-11-25
Publication of GB1603255A
publication
Critical
patent/GB1603255A/en

Status
Expired
legal-status
Critical
Current

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238000005242
forging
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Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL

B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES

B21J13/00—Details of machines for forging, pressing, or hammering

B21J13/08—Accessories for handling work or tools

B21J13/085—Accessories for handling work or tools handling of tools

B—PERFORMING OPERATIONS; TRANSPORTING

B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL

B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES

B21J13/00—Details of machines for forging, pressing, or hammering

B21J13/02—Dies or mountings therefor

B21J13/03—Die mountings

Description

PATENT SPECIFICATION
tn It ( 21) Application No 13642/78 ( 22) Filed 7 April 1978 M ( 31) Convention Application No 2716023 c ( 32) Filed 9 April 1977 in 0 ( 33) Fed Rep of Germany (DE) ( 44) Complete Specification Published 25 November 1981 ( 51) INT CL 3 B 21 J 13/03 // 13/08 ( 52) Index at Acceptance B 3 H 2 C ( 11) 1 603 255 ( 54) QUICK CHUCKING DIE HOLDER DEVICE FOR FORGING PRESSES ( 71) 1, GEORG FELLNER, of German nationality of Am Tale 4, Fridingen, Federal Republic of Germany, do hereby declare the invention for which I pray that a patent may be granted to me and the method by which it is to be h performed to be particularly described in and by
the following statement:-
This invention relates to a quick chucking die holder device for forging presses using springloaded chucking and latching wedges.
A known quick chucking die holder (German provisional patent publication 2544711) comprises chucking and latching wedges which are held in chucking or latching position respectively by means of springs, especially cup spring packets and which are retracted and thereby loosened by means of hydraulic cylinders acting against the springs This, however, causes considerable difficulties with regard to the available mounting space and the hydraulic cylinders run the risk of getting damaged -mainly due to overheating when the press is operated Furthermore hydraulic cylinders with their control and other additional equipment demand considerable technical resources, last not least with regard to their maintenance.
The invention seeks to reduce the overall dimension of a quick chucking die holder, to decrease its purchase cost and to ensure a better reliability in operation than is given when an hydraulic auxiliary installation is used to retract the wedges.
According to the invention, there is provided a quick action die holding device for forging I 35 presses comprising a first die holder attached to the press ram a second die holder attached to the press bed, first and second adapter plates for carrying the dies and releasably attached to the respective die holders, spring-loaded latch members movable transversely of the die holders for attaching the adapter plates thereto and means for selectively releasing the latch members by normal movement of the ram.
Consequently the hitherto employed hydraulic auxiliary installation is no longer required In replacement thereof, now the force of the press, and the already existent slow motion control of the ram are used to actuate the wedges and particularly the chucking wedges The mechanical force transmission components to be mounted in 50 the quick chucking die holder do not enlarge its overall dimension Having no longer to deal with wear, sealing problems and electrical defects which are unavoidable when hydraulic elements are employed, the reliability in operation of the 55 quick chucking die holder will be improved.
The following discussion with regard to constructional details refers to the chucking wedges acting in vertical direction as well as to the latching wedges acting in horizontal direction In 60 order to simplify matters, the following description is directed only on chucking wedges acting in a horizontal direction.
The invention may provide retracting wedges co-acting with the chucking wedges by means of 65 inclined surfaces Preferably, the arrangement is made in such a way that the retracting wedges not only move the chucking wedges against the action of their springs, but also retain them in their retracted position without any further 70 external intervention Therefore retracting and chucking wedges having additional co-acting surfaces which are adjacent to the aforementioned inclined surfaces may be used, the additional surface of the chucking wedge being square to its 75 direction of motion When the retracting wedge is pushed in, as soon as the inclined surfaces have slid apart, it is held clamped fast by the springloaded chucking wedge, the respective additional surfaces bearing on each other 80 If the retracting wedges are movable in a vertical direction, this simplifies matters essentially.
As to this case, the supports may be inserted between the retracting wedges of the upper and lower die holder so as to push in the retracting 85 wedges on the downstroke of the ram During this downstroke, both die holders approach each other There will be no difficulties caused by different pushing forces for the upper and lower retracting wedges if the thrust supports are con 90 structed in such a way that they rest upon the respective die holder after a retracting wedge has been pushed in, thus limiting the inward movement of the retracting wedge In order to avoid any damage to the thrust supports or the press, if, 95 due to the mounting of smaller dies, the lower reversal point space of the press had been altered in height, each thrust support may consist of two 1 603 255 parts which are clamped together with an overlap, thus permitting them to shift over each other against the action of the clamping friction in case of excessive ram thrust and allowing a safe shortening of the thrust support.
In order to release the retracting wedges, twoarmed rockers may be arranged underneath the retracting wedges of the lower die holder and above the retracting wedges of the upper die holder One arm of each rocker may bear against the retracting wedge and the other arm bears against a release tappet which is guided vertically slidably in the die holder If this release tappet is pressed in, the rocker pushes out the retracting wedge If thrust pieces attachable to the release tappets are employed in order to elongate them, it becomes possible to press the release tappets in by the downstroke of the ram, whereby a firm chucking of the dies is effected.
A preferred embodiment of the invention provides a coaxial arrangement of the corresponding release tappets of both die holders and thrust pieces to be disposed between them Moreover there may be provided spring elements pressing down the release tappets of the upper die holder.
These spring elements preferably also cup spring packets are adapted to release first the lower retracting wedges and only thereafter the upper retracting wedges during the downstroke of the ram This selected succession avoids accidentally chucking the lower die only on the left and the upper die only on the right side, which would cause an overload of the centering gibs mounted within the die holders The spring elements, however, enforce a bilateral chucking, first of the lower and then of the upper die.
With the aid of different thrust pieces, it is also possible to release by choice the retracting wedges of the upper or of the lower die holder individually These thrust pieces permit a closer distance between the two release tappets and they rest in the one case upon the lower and in the other case upon the upper die holder.
The invention will now be described in greater detail, by way of example, with reference to the schematic drawings, in which:Figure 1 is a top plan view of a modified lower die holder showing pushed in retracting wedges.
i.e retracted chucking wedges; Figure 2 is a section view of a modified twopiece die holder device taken along the line II-II and also showing pushed in retracting wedges; Figure 3 is a sectional view taken along the line III-III of the arrangement of Figure 2; Figure 4 is a top plan view of the employed U-shaped chucking member partly broken away; Figures 5 and 6 are views drawn on an enlarged scale with reference to Figures 2 and 3, showing released retracting wedges, i e chucking wedges in chucked position; and Figure 7 shows a thrust piece different to that shown in Figure 5 and adapted to release the upper retracting wedges only.
The die holder device consists of a first or upper die holder 1 attached to the press ram (not shown) and a second or lower die holder 2 attached to the pressed bed (not shown) which are guided relatively to each other by means of two guiding posts 3 A first or upper and a second lower adapter plate 4 and 5 are positioned in the 70 respective die holders and contain dies 6 and 7.
In the die holders are mounted two U-shaped chucking members 8 (Figure 4), which are as demonstrated by arrows slidable in a transverse direction, seen from the operating side 75 The U-shaped chucking members consist of two chucking wedges 9 connected by a web portion 10 The shape of the front parts of the chucking wedges which engage the adapter plates 4 and is now described in more detail 80 The front parts of the chucking wedges 9 as shown in Figure 6, have two inclined surfaces each with different angles of inclination The adapter plates 4 and 5 are provided with recesses Sa to receive these front parts of the chucking 85 wedges.
The recesses cooperate with the wedge surfaces of the chucking wedges such that the wedge surfaces of larger inclination engage recess sides of larger inclination and the wedge surfaces of 90 smaller inclination engage recess sides of the same inclination so as to chuck the adapter plates on to their respective die holders in a vertical direction.
At web portion 10 of the U-shaped chucking 95 member, distinction has to be made between wedge surface 11 and latching surface 12, the latter being perpendicular to the direction of motion; both surfaces coact with retracting wedges 13 Each chucking wedge 9 contains a series of 14 100 cup springs which are penetrated by a guide bolt The retracting wedges 13 are mounted in the die holders 1 and 2 to be vertically slidable i e.
transverse to the direction of motion of the Ushaped chucking members 8 The end positions 105 of the chucking and retracting wedges are shown in Figures 3 and 6 Stop pins 16 prevent the retracting wedges from slipping out One wedge surface 17 and one latching surface 18 of each retracting wedge 13 coact with the respective sur 110 faces 11 and 12 at the web portions 10 of the U-shaped chucking members 8.
Underneath or above the retracting wedges 13 respectively, freely moving, boomerang-like rockers 20 are placed in suitably dimensioned 115 hollows 19 of the die holders These rockers rest on one side upon the associated retracting wedge 13 and on the other side upon vertically slidable release tappets 21, 22 These tappets are mounted coaxially facing each other The lower 120 release tappets 21 project, even if the retracting wedge is released, above the top surface of the lower die holder 2 and centre thrust pieces which will be described below The upper release tappets 22 are pressed down by cup springs 23, which 125 are contained in the adequately enlarged lower part of the associated boreholes in the die holder.
The thrust supports 24 serve for pushing in the retracting wedges, one of them is shown in Figures 2 and 3 Each thrust support consists of 130 1 603 255 two plates 25 and 26 having on their upper and lower parts enlarged supporting edges and being screwed together with an overlap The holes of the connecting screws are oblong holes 27 extending in a vertical direction In order to permit an exact positioning of the thrust supports when the die holders are moved apart, the lower supporting edge is equipped with centering pins 28, enabling the thrust supports to be inserted into corresponding boreholes of the lower retracting wedges 13.
Figures 5 and 7 finally show thrust pieces 29 and 30 which may be slipped on the lower release tappets 21, whereby thrust piece 29 has a shorter and thrust piece 30 has a deeper borehole The outside diameter of these cylindrical thrust pieces which have a bevelled top side is designed as to enable a slack insertion into the enlarged lower part of the borehole of the upper die holder.
In operation, an exchange of the dies is executed with the aid of the described quick chucking die holder in the following way When the ram together with the upper die holder 1 is moved up (this position is not shown), the two thrust supports 24 are slipped on the lower retracting wedges 13 Now the downstroke of the ram is actuated by the slow motion control of the press Consequently first the upper retracting wedges are placed upon the upper surfaces of the thrust supports 24 During the further motion, the lower as well as the upper retracting wedges are pushed in so that the U-shaped chucking members In order to avoid any damage of the thrust supports 24 or other troubles caused by altered die space, both plates 25 and 26 of the supports 24 are movable towards each other to a certain extent.
The upper die holder is moved up again and the supports 24 are removed The upper adapter plate 4 with the upper die 6 remain reposing upon the lower adapter plate 5 and the lower die 7, making it thus possible to remove the whole die from the press.
For installation of other adapter plates with new dies, two thrust pieces 29 with short boreholes are slipped on to the two lower release tappets 21 If now the upper die holder 1 again is moved down by the slow motion control, the upper release tappets 22 abut on the thrust pieces 29 and during further motion first the lower release tappets 21 are pressed in, as the cup springs 23 augment the force which is necessary to press the upper release tappets 22 in The insertion of the release tappets 21 effects a tipping movement of the lower rockers 20 They push, with their opposite arms, the lower retracting wedges 13 upwards, whereby it is sufficient to separate at least the latching surfaces 12 and 18.
Now the action of the cup springs 14 of the Ushaped chucking members 8 takes place The chucking wedges 9 engage the lower adapter plate 5 and chuck it firmly down, whereby simultaneously and by means of the wedge surfaces 11 and 17, the lower retracting wedges 13 are moved further upwards.
As soon as the thrust pieces 29 rest upon the lower die holder 2 during the downstroke of the ram, the further motion moves the upper release tappets 22 into the upper die holder I against the action of cup springs 23 Now the same process as 70 described will take place in mirror-image The upper rockers 20 press the upper retracting wedges 13 downwards so as to release them The upper U-shaped chucking members 8 thus chucking the upper adapter plate 4 firmly Thereafter 75 the upstroke of the ram may be executed and the two thrust pieces 29 may be taken out Production may be continued immediately.
If instead of the thrust pieces 29 the thrust pieces 30 are installed, the lower release tappets 80 21 remain unaffected so that only the upper adapter plate 4 is chucked A requirement of this kind often emerges if, for example, the lower adapter plate 5 only has to be removed to enable necessary reworking due to wear of the lower die 85 7 In this case the upper adapter plate 4 and the die 6 contained therein, need not to be removed.

Claims (12)

WHAT I CLAIM IS:-

1 A quick action die holding device for forging presses comprising a first die holder attached 90 to the press ram, a second die holder attached to the press bed, first and second adapter plates for carrying the dies and releasably attached to the respective die holders, spring-loaded latch members movable transversely of the die holders for 95 attaching the adapter plates thereto and means for selectively releasing the latch members by normal movement of the ram.

2 A device according to claim 1, wherein the spring-loaded latch members comprise chucking 100 wedges each having a first inclined surface with a relatively large angle of inclination cooperating with a first chamfered edge of an adapter plate and a second inclined surface with a relatively small angle of inclination cooperating with a 105 similarly inclined chucking surface of the adapter plate to chuck the adapter plate in a perpendicular direction onto the respective die holder.

3 A device according to Claim 2, wherein the chucking wedges coact with retracting wedges for 110 retracting the chucking wedges by means of inclined surfaces.

4 A device according to Claim 3, wherein retracting and chucking wedges have co-acting latching surfaces adjacent to the inclined sur 115 faces, the chucking wedge in its loosened position bearing with its latching surface on the latching surface of the retracting wedge, like on a cross bar.

A device according to Claim 2, wherein the 120 retracting wedges are movable in a vertical direction and thrust supports are arranged to be inserted between the retracting wedges of the first and second die holders so as to push in the retracting wedges on the stroke of the ram to 125 wards the press bed.

6 A device according to Claim 5, wherein the thrust supports comprise two parts clamped together with an overlap.

7 A device according to any one of Claims 3 to 130 1 603 255 6, in which two-armed rockers are arranged behind the retracting wedges of the second die holder and behind the retracting wedge of the first die holder so that one arm of a certain rocker bears against a retracting wedge in a releasing direction when the ram, during its movement towards the press bed, bears against the other arm by means of a release tappet guided slidably in a borehole of the die holder.

8 A device according to Claim 7, wherein thrust pieces are provided to be attached to the release tappets so as to elongate them.

9 A device according to Claim 8, wherein the corresponding release tappets of both die holders are arranged coaxial, thrust pieces being disposable between them and spring elements pressing down the release tappets of the first die holder.

A device according to any one of claims 2 to 9, wherein different thrust pieces are provided for releasing selectively all retracting wedges or only those associated with the first or second die holders individually.

11 A device according to any one of claims 3 to 10, wherein two chucking wedges arranged one beside the other and connected by a web portion form a U-shaped chucking member and the associated retracting wedge coacts with an inclined surface of the web portion.

12 A quick chucking die holder device substantially as hereinbefore described with reference to the drawings.
J F WILLIAMS & CO.
Chartered Patent Agents 34 Tavistock Street London, WC 2 E 7 PB For the Applicant.
Printed for Her Majesty’s Stationery Office by MULTIPLEX techniques ltd, St Mary Cray, Kent 1981 Published at the Patent Office, 25 Southampton Buildings, London WC 2 l AY, from which copies may be obtained.

GB13642/78A
1977-04-09
1978-04-07
Quick chucking die holder device for forging presses

Expired

GB1603255A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

DE19772716023

DE2716023A1
(en)

1977-04-09
1977-04-09

QUICK CLAMPING TOOL FOR FORGING PRESSES

Publications (1)

Publication Number
Publication Date

GB1603255A
true

GB1603255A
(en)

1981-11-25

Family
ID=6006073
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB13642/78A
Expired

GB1603255A
(en)

1977-04-09
1978-04-07
Quick chucking die holder device for forging presses

Country Status (5)

Country
Link

US
(1)

US4187713A
(en)

DE
(1)

DE2716023A1
(en)

FR
(1)

FR2386370A1
(en)

GB
(1)

GB1603255A
(en)

IT
(1)

IT1095856B
(en)

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CN111036819A
(en)

2019-12-18
2020-04-21
荣成华东锻压机床股份有限公司
Anti unbalance loading device of precision hot die forging press

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Title

US4150451A
(en)

1978-03-01
1979-04-24
Usm Corporation
Die holder assembly

US4698894A
(en)

1984-07-02
1987-10-13
Hubbell-Bell Inc.
Quick change die retention apparatus

US4587830A
(en)

1985-07-15
1986-05-13
Mills Charles E
Punch press with quick-change die set

US5282958A
(en)

1990-07-20
1994-02-01
Chevron Research And Technology Company
Use of modified 5-7 a pore molecular sieves for isomerization of hydrocarbons

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1991-05-21
1991-05-21
Sonnie Hermansson

MEDICAL CONTROL FOR TOOL

IT1292804B1
(en)

1997-03-18
1999-02-11
Ima Spa

EQUIPMENT FOR STAMPING, ENGRAVING, UNDRAWING OF BLISTER PACKS OBTAINED FROM A HONEYCOMB TAPE.

DE10023932A1
(en)

2000-05-17
2001-11-22
Mohr Adolf Maschf
Punch for sheets incorporates punching knife in frame, holder, stamping punch, punching head plate, and two parallel holder bars.

KR100673799B1
(en)

2005-08-24
2007-01-25
주식회사 명성금속
Structure of block die for a forging machine

JP4909835B2
(en)

2007-08-02
2012-04-04
株式会社小松製作所

Mold clamping mechanism of press machine

CN100491013C
(en)

2007-09-29
2009-05-27
蔡体勇
Cold header locking mould structure

JP5869934B2
(en)

2012-03-28
2016-02-24
株式会社神戸製鋼所

Forging die equipment

CN102974735B
(en)

2012-12-06
2015-03-25
无锡透平叶片有限公司
Positioning adjustment structure of large-sized forging die

JP6519857B2
(en)

2015-03-18
2019-05-29
日立金属株式会社

Mold equipment for hot forging

KR101734685B1
(en)

2015-10-13
2017-05-11
현대자동차주식회사
Forging die apparatus

JP6924376B2
(en)

2017-08-04
2021-08-25
日立金属株式会社

How to manufacture hot forging dies and forged products

CN108145056A
(en)

2018-01-24
2018-06-12
内蒙古第机械集团有限公司
A kind of forging forcing press universal die set

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Assignee
Title

US3435655A
(en)

1965-03-31
1969-04-01
Sumitomo Metal Ind
Clamping device for forging die in press

US3638473A
(en)

1969-11-19
1972-02-01
Wyman Gordon Co
Block and die shoe clamping assembly

US3762264A
(en)

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Whitney Corp W
Tool holder for punches and the like

DE2544711C3
(en)

1975-10-07
1983-06-01
Georg 7203 Fridingen Fellner

Quick clamping tool for forging presses

1977

1977-04-09
DE
DE19772716023
patent/DE2716023A1/en
active
Granted

1978

1978-04-07
GB
GB13642/78A
patent/GB1603255A/en
not_active
Expired

1978-04-07
FR
FR7810385A
patent/FR2386370A1/en
active
Granted

1978-04-10
IT
IT22124/78A
patent/IT1095856B/en
active

1978-04-10
US
US05/894,680
patent/US4187713A/en
not_active
Expired – Lifetime

Cited By (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CN111036819A
(en)

2019-12-18
2020-04-21
荣成华东锻压机床股份有限公司
Anti unbalance loading device of precision hot die forging press

Also Published As

Publication number
Publication date

IT7822124D0
(en)

1978-04-10

DE2716023A1
(en)

1978-10-12

IT1095856B
(en)

1985-08-17

FR2386370A1
(en)

1978-11-03

US4187713A
(en)

1980-02-12

FR2386370B1
(en)

1983-10-28

DE2716023C2
(en)

1987-07-30

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