摘要:
An apparatus and method are disclosed for producing a stream of short fibres which can be used for the purpose of reinforcing a cementitious mix. One ore more strands (S1, S2) are fed between an acoustic horn (22) or heater and a drum (12) carrying a plurality of anvils. The strand is weakened, but not broken, at each zone where it is subjected to heat. The strands (S1, S2) pass through a bath (32) of cementitious mix and are coated. The strands (S1, S2) are then broken into fibres by pulling rollers (18) and dropped into a mould (42).
摘要:
Method for shearing to size bars, the method using shears comprising a pair of counter-rotating drums (11), the shears comprising a single-channel switching device (14) suitable to cause the rolled stock (13) to transit in correspondence with a shearing zone (20) and a scrapping zone (21), there being included reception means (30, 31) for the bars sheared to size and reception means (28) for the scrapped ends, the blade-bearing drums (11) being maintained in continuous rotation for the whole duration of the shearing cycle, the rotation speed of the blade-bearing drums (11) being made proportionate, on each occasion, to the specific speed of feed of the rolled stock (13) and to the desired base measurement of the bars, the base measurement being a desired shearing length which is a sub-multiple of the length of each bar to be sheared to size, the speed of rotation of the drums (11) being angularly constant and calculated to achieve a finite number of passes of the shearing blades (17) for the specific speed of feed of the rolled stock (13) and for a plurality of specific lengths of the bar (13) which are multiples of the base measurement. Shears for shearing to size rolled bars suitable to achieve the method as described above.
摘要:
The invention relates to an installation for separating elements of a chosen length from several steel sections, in particular, wire, ribbon and strip-shaped sections. The installation comprises at least one device which continuously advances the material section at high speed, at least one stationary cutting device, having at least one mobile blade and a control unit. At least one cutting device (1, 1') is provided for each material section (M); each cutting device (1, 1') can be individually controlled by a central servo-valve (4) which is connected to the control device (3), in order to rapidly separate elements of equal and/or different length and the stroke of at least one blade (8) on the cutting device (1, 1') is selected depending on the material thickness of the material section (M) to be severed.
摘要:
A bar deburring plant, in particular for cut to size round bars, comprising: a first roller feed path (12) of cut bars (11) towards an alignment element (13) of one first end of said bars, a first transfer element (14-20) of said bars, with said first aligned end, to a conveyor (21) of said bars, which are spaced one after the other, said conveyor carries said first ends of said aligned bars (11) under a brushing head (28), a second roller feed path (31) of said cut bars (11) going towards a second alignment element (32) of the second end of said bars, a second transfer element (31, 33) of said bars, with said second aligned end, to a second conveyor (36) of said bars, which are spaced one after the other, said conveyor carries said second ends of said aligned bars (11) under a second brushing head (39, 46).
摘要:
A bar deburring plant, in particular for cut to size round bars, comprising: a first roller feed path (12) of cut bars (11) towards an alignment element (13) of one first end of said bars, a first transfer element (14-20) of said bars, with said first aligned end, to a conveyor (21) of said bars, which are spaced one after the other, said conveyor carries said first ends of said aligned bars (11) under a brushing head (28), a second roller feed path (31) of said cut bars (11) going towards a second alignment element (32) of the second end of said bars, a second transfer element (31, 33) of said bars, with said second aligned end, to a second conveyor (36) of said bars, which are spaced one after the other, said conveyor carries said second ends of said aligned bars (11) under a second brushing head (39, 46).
摘要:
An apparatus for producing a thermal stress-relieving zone in an automotive heat exchanger having a frame (12) including a pair of channel-shaped side supports (24) is disclosed, the apparatus including a support mechanism (36, 72, 74) for receiving and supporting the heat exchanger and a zone-producing mechanism for producing a stress-relieving zone in one of the side supports. The zone-producing mechanism includes a side support engaging device (62, 64) for engaging the side support at a predetermined location and a shearing mechanism (78, 80) which reciprocates between a first and second position to shear the side support (24).
摘要:
In the shearing of successive logs (28,37) of heated metal to form billets, a trailing end portion (34) of one log and a leading end portion of a following log are used to form two billets, each of these billets comprising one part (35,36) formed from the first log and another part formed from the following log (37).
摘要:
Very high speed flying shears (10) which is suitable to shear rolled stock (18) travelling even at more than 100 metres per second and comprises two knives (14) with blades (17) able to contrarotate in relation to each other at a pre-set speed at least in the transient period of shearing and is equipped with a guide (11) able to move sideways (19-119) at a pre-set speed (V) and to position itself in a defined position in relation to the circumferential position of the blades (17), an inner dividing wall (27) being located downstream of the knives (14) in a conveyor channel (13), in which shears (10) during the transient period of shearing: - the speeds (VR) of lateral movement of the guide (11) and of rotation of the knives (14) are correlated, and - the lateral position of the guide (11) and the circumferential position of the blades (17) of the knives (14) are strictly interdependent.
摘要:
A shearing apparatus for bar stock comprising a fixed die (12) and a movable die (14) wherein the movable die (14) comprises a shearing ring (25) carried by an arm (24) at a location intermediate the ends of the arm (24), an eccentric (38) fixed on a driven shaft (34) is journalled in one end of the arm (24), and the other end of the arm includes a slot (24A) which receives a rotationally mounted slide block (27) so that the slot (24A) and slide block (27) coact to accommodate combined rotary and translatory movement of that end of the arm. The described arranement produces an elliptical loop movement of the movable die (14) relative to the fixed die (12) to cleanly shear the stock.