EP0041690B1
Expired / Lapsed
EP
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Multistage metal-forming machine
Assignee: Hatebur Umformmaschinen AG
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Filing: 1981-06-03
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Granted: 1984-03-28
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Expires: 2001-06-03
Abstract
Abstract A blank (17), which has been sheared off from a coil of wire or from a rod, is rotated through 90 DEG , this rotation being required in connection with the forging of this blank. The gripping-jaws (19, 20), serving for the purpose of transport from one station to the adjacent metal-working station, are attached, for this purpose, to rotating devices (9c, 9d), which are mounted in a manner permitting rotation and are located, on the one hand, on a guide part (7a, 7b) which is driven to reciprocate (A) and to oscillate about an axis (93), and, on the other hand, are anchored to the stationary die-holder (3) via a guiding mechanism (23a, 23b). The guiding mechanism can be regarded as a spatial double-link mechanism, possessing a connecting rod (24), a coupling link (25), a stationary pin-joint (28), a ball-joint (30), and a pin-joint (29a, 29b) which travels with the rotation device (9c, 9d). The components are arranged in such a way that the greatest part of the intended 90 DEG rotation of the blank takes place in the first half of the translational transport movement.
Inventors
- 👤 Ulrich Steinhauser
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 04:51
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21K; B21K27/00; B21K27/02; B21K27/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
355 words
A multistage forming machine for the forming of blanks without cuttings which are turned through practically 90° on transition from one station to the next station with respect to the axis of rotation (21), located transversely to the longitudinal range of the blanks and transversely to the pressing direction, provision being made for the carriage of the blanks between the two adjoining stations for a pair of grippers whose two grippers (19, 20) are fixed via gripper carrier 9 to guide components (7a, 7b) which in turn are rigidly connected to a reciprocating (A) driven main shaft (8) swivelling around its own axis (B) and at least one of the two gripper carriers (9a, 9b) is rigidly connected to a transfer element (9c, 9d, 46), rotatably mounted around the axis of rotation (21 ), whereon there engages the one end of a guide mechanism (23) whose other end bears on an anchorage fixed with respect to the reciprocating gripper carrier (9a, 9b), characterised in that the guide mechanism (23) has a guide (24) as well as a coupler (25), the coupler (25) being connected to the guide (24) via a jointed coupling (30,53) which permits any desired angular motion of the coupler (25) in space and does, moreover, engage the coupler (25) at the allocated transfer element (9c, 9d, 46) via a joint (50) which ensures that the transfer element (46) is rigidly carried along by coupler (25) in the direction of rotation around the said axis of rotation (21 ) but does, on the other hand, with a view to the opening and closing movement of the grippers, permit a reciprocal swivel of the transfer element (9c, 9d, 46) and coupler (25) in a plane passing through the axis of rotation (21) in such a way that the said coupling (30, 53) is, under the effect of the translational motion of the gripper carrier (9), led over a circular arc around the fixed swivel axis (28) of guide (24) and therewith turns the transfer element (9c, 9d, 46) and with the latter, the gripper carrier (9a, 9b) and the gripper (19, 20) through 90°.
Claim 2
Dependent Claim
355 words
A multistage forming machine for the forming of blanks without cuttings which are turned through practically 90° on transition from one station to the next station with respect to the axis of rotation (21), located transversely to the longitudinal range of the blanks and transversely to the pressing direction, provision being made for the carriage of the blanks between the two adjoining stations for a pair of grippers whose two grippers (19, 20) are fixed via gripper carrier 9 to guide components (7a, 7b) which in turn are rigidly connected to a reciprocating (A) driven main shaft (8) swivelling around its own axis (B) and at least one of the two gripper carriers (9a, 9b) is rigidly connected to a transfer element (9c, 9d, 46), rotatably mounted around the axis of rotation (21 ), whereon there engages the one end of a guide mechanism (23) whose other end bears on an anchorage fixed with respect to the reciprocating gripper carrier (9a, 9b), characterised in that the guide mechanism (23) has a guide (24) as well as a coupler (25), the coupler (25) being connected to the guide (24) via a jointed coupling (30,53) which permits any desired angular motion of the coupler (25) in space and does, moreover, engage the coupler (25) at the allocated transfer element (9c, 9d, 46) via a joint (50) which ensures that the transfer element (46) is rigidly carried along by coupler (25) in the direction of rotation around the said axis of rotation (21 ) but does, on the other hand, with a view to the opening and closing movement of the grippers, permit a reciprocal swivel of the transfer element (9c, 9d, 46) and coupler (25) in a plane passing through the axis of rotation (21) in such a way that the said coupling (30, 53) is, under the effect of the translational motion of the gripper carrier (9), led over a circular arc around the fixed swivel axis (28) of guide (24) and therewith turns the transfer element (9c, 9d, 46) and with the latter, the gripper carrier (9a, 9b) and the gripper (19, 20) through 90°.
Claim 3
Dependent Claim
45 words
A forming machine according to claim 1, characterised in that the guide mechanism (23) is disposed with reference to the two adjoining stations in such a way that the intended rotation of the blank is preponderantly effected in the first half of the translational motion.
Claim 4
Dependent Claim
31 words
A forming machine according to one of claims 1 and 2, characterised in that the jointed coupling (53) disposed between coupler (25) and guide (24) is a ball and socket joint.
Claim 5
Dependent Claim
71 words
A forming machine according to one of claims 1 to 3, characterised in that the coupler (25) is at the end facing towards the transfer element (9c, 9d, 46) fork shaped and does, therewith, encompass a pin (50) passing through the transfer element (46) whilst the other end of coupler (25) forms a housing (51 ) whose pin (52) is enveloped by guide (24) via the ball and socket joint (53).
Claim 6
Dependent Claim
22 words
A forming machine according to claim 4, characterised in that the coupler (25) is only connected to pin (50) on one side.
Claim 7
Dependent Claim
96 words
A forming machine according to one of claims 1 to 5, characterised in that the gripper carrier (9a, 9b, 55) is conjugately coupled with the adjoining transfer element (46) in such a way that their respective distance may be altered by means of an adjusting element (58), one gripper carrier (55) respectively of each gripper pair being capable of being fixed in its respective position in the direction of its gripping movement in relation to the transfer element (46) whilst the other gripper carrier (66) is spring mounted (70) in the direction of its gripping movement.
Claim 8
Dependent Claim
89 words
A forming machine according to one of claims 1 to 6 with a horizontal forming direction, characterised in that the upper guide mechanism (23a) is fixed on a bracket (26) which is swivel mounted on a shaft (92) which may, in turn, be coupled with the main shaft (8) via a detachable coupling (90) in such a way that the whole gripper carrier apparatus (7a) including the upper guide mechanism (23a) may be tilted upwards around the main shaft (8) by a drive element (27) engaging on bracket (26).
Claim 9
Dependent Claim
62 words
A forming machine according to one of claims 1 to 7, wherein the rotation is to be effected ahead of the first forming station, characterised in that there is interposed between the shearing station (15) and the first forming station (II), a holding station (I) wherein the blank (17) is held between a stop pin (18) and a movable holding pin (16).
Claim 10
Dependent Claim
78 words
A forming machine according to claim 8, wherein the stop (18) is mounted for displacement in the longitudinal direction and is designed to be adjustable with a view to the processing of blanks of various lengths, characterised in that the longitudinal setting on the shearing mechanism (15) is coupled with the adjustment device of stop (18) in such a way that stop (18) does automatically adjust, in a transition to a blank of different length, to the latter.
References Cited (Backward Citations)
No citation records indexed.
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