摘要:
The present invention relates to a spindle for a spinning frame or a twisting frame by which a tail yarn is formed on a full bobbin and is taken out from the full bobbin at a cop changing operation and is assuredly held on the spindle. In the spindle of the present invention, a band-like yarn-hanging member (2) is arranged on the peripheral face of an intermediate part of a bobbin-attaching portion (a-b) of the spindle and the band-like yarn-hanging member catches and holds the yarn wound in the form of a loop attached to the spindle at the cop changing operation.
摘要:
A chuck jaw changer is provided for a machine tool such as a numerically controlled lathe (22) for automatically changing the gripping jaws (32) of a quick change chuck (28) on its work spindle (26). The set of gripping jaws of the chuck are replaceably engaged in respective radial guideways (56) in a chuck body (30), with each gripping jaw being slid into and out of one guideway when that guideway is in a preassigned jaw change position on the chuck body. The chuck jaw changer has a rotary, indexing jaw magazine (34) having holder grooves (140) defined therein at constant circumferential spacings for releasably holding additional sets of gripping jaws (32') interchangeable with the jaw set on the chuck body. A jaw transfer mechanism (36) transfers a gripping jaw (32, 32') rectilinearly between that one of the guideways (56) in the chuck body which is in the jaw change position and that one of the holder grooves in the jaw magazine which is positioned in line therewith. For 9 ccurate jaw transfer a jaw guide (38) is interposed between chuck body and jaw magazine so as to provide a substantially continuous, rectilinear jaw guide track therebetween.
摘要:
A chuck jaw changer is provided for a machine tool such as a numerically controlled lathe (22) for automatically changing the gripping jaws (32) of a quick change chuck (28) on its work spindle (26). The set of gripping jaws of the chuck are replaceably engaged in respective radial guideways (56) in a chuck body (30), with each gripping jaw being slid into and out of one guideway when that guideway is in a preassigned jaw change position on the chuck body. The chuck jaw changer has a rotary, indexing jaw magazine (34) having holder grooves (140) defined therein at constant circumferential spacings for releasably holding additional sets of gripping jaws (32') interchangeable with the jaw set on the chuck body. A jaw transfer mechanism (36) transfers a gripping jaw (32, 32') rectilinearly between that one of the guideways (56) in the chuck body which is in the jaw change position and that one of the holder grooves in the jaw magazine which is positioned in line therewith. For 9 ccurate jaw transfer a jaw guide (38) is interposed between chuck body and jaw magazine so as to provide a substantially continuous, rectilinear jaw guide track therebetween.
摘要:
A method for changing bobbins of a roving frame to bobbin supporting members of a bobbin conveying device, and vice versa, and a bobbin changing machine for performing the method. After full bobbins arranged in a zigzag arrangement are doffed from the roving frame by means of the bobbin changing machine, distance between bobbins corresponding to distances between bobbin wheels of the roving frame, are changed to the distances between bobbins on the creel of a spinning frame, and vice versa, by means of a lateral distance changing device of the bobbin changing machine. Simultaneous with or after the previous process, the zigzag arrangement of the bobbins is aligned, and vice versa, by means of a front and back distance changing device of the bobbin changing machine.
摘要:
@ An apparatus for producing special yarn made of a fiber strand in which a number of fibers are randomly arranged along the lengthwise direction thereof, in which special yarn at least one of the yarn structural parameters, e.g., yarn count number or number of twist, changes along the lengthwise direction of the yarn. A pattern of change of the parameters of the yarn structure with respect to the length of the special yarn to be produced is stored in a central processing device, while a spun length of the special yarn is measured by a sensor. The yarn structural parameters are changed to correspond to the pattern set to the central processing device and the special yarn is produced by the yarn forming device using another central processing device of the spinning frame. This apparatus can be used for a ring spinning frame, an open end spinning frame, a fasciated yarn spinning frame, and the like.
摘要:
A method and apparatus for switching the relative position between roving bobbins held by bobbin hangers of a front row and the roving bobbins held by the rear row in a spinning frame. The roving bobbin exchange operation is carried out as successive unit operations from one end-said of the spinning frame to the other end-side thereof. In each unit operation, first the axial distance (ab) between a bobbin hanger of the front row (15B) and a bobbin hanger of the rear row (15c), which are positioned adjacently in the lengthwise direction of the spinning frame, is reduced to a predetermined distance, (cd) then the relative position of those two bobbin hangers is reversely changed while maintaining the reduced axial distance. Thereafter, the axial distance between those two bobbin hangers is returned to the initial condition for carrying out the spinning operation. The roving bobbin exchange operation can be carried out during the normal spinning operation, when the roving bobbins held by either one of the bobbin hangers of the front row and the rear row become substantially exhausted.
摘要:
A chuck jaw changer is disclosed as mounted on the headstock (24) of an N/C lathe (22) for automatically changing the set of gripping jaws (32) of a quick change chuck (28) on a work spindle (26) with any of other interchangeable sets of gripping jaws (32') being held by a rotary, indexing jaw magazine (34). The jaw magazine has formed therein several jaw grooves (150) each for holding one set of gripping jaws (32'), or the jaw set (32) withdrawn from the chuck, slidably engaged therein in a row. An indexing mechanism (35) revolves the jaw magazine relative to the machine tool for bringing any of the jaw grooves into line with that one of radial jaw guideways (54) of the chuck which is being held in a prescribed jaw change position on the work spindle. A jaw transfer mechanism (36) operates for successively transferring the set of jaws from the chuck into an empty jaw groove in the jaw magazine, and a different set of jaws from the jaw magazine to the chuck. Thus the transfer of each set of gripping jaws from the chuck to the jaw magazine or vice versa can be completed while the magazine is held at a standstill on the machine tool.