Control drive for lathe chuck
FRENCH REPUBLIC PATENT SERVICE OF INVENTION iNTELLECTUAL INDUSTRIELLE of the Gr. 5.-Cl. 4. No. 972,533 [...]- Society said: Charles CHURCHILL & °C m. Limited andCharles Harry [...] residing in the UK. Demanded the28 September 1948,21 11 to 14m, to Paris. .-Issued 30 August 1950 Published 31 January 1951. The present invention relates to devices control of the chucks said "-clip bar ", / machines, in which the workpiece is rotated. II is common practice, with respect to the chuck provided in the pin holder bar towers, to make use of angle levers, ordinarily called "toggle", for cause relative movement of the clip is- bar itself, or the closure sleeve the collet, for clamping the workpiece. The aim of the invention is to provide a mecha- toggle mechanism of a novel type for replace those currently in use, and a shape of preferred embodiment of the construction inventive No. 4543/44 English. It has been found, in practice, that, when the mechanism is incorporated in some of the disp ' o- sitions described in this patent application (such as those of fig. 7, 8, 9 and 10 in the- two pairs of rollers which reaction com- [...] by rollers actuated by thrust a common cam are arranged parallel to each other) and mounted on the spindle of a lathe rotating at high speeds, the forces-centri [...] are such that the rollers push tend to stay in contact with the rollers reaction when the movement of the cams removal, which counteracts the instant opening of the collet, and makes necessary the use of springs or other means for releasing the rollers thrust speeds of about 6,000 revolutions per minute, or higher. Another object of the invention is, therefore, provide a mechanism by which the comfort- [...] are reduced or switched off. The present invention comprises a device control collet, for the towers and machines in which the workpiece is in- by rotation, and which uses rollers for perform the movement of a part of the operating mechanism for the collet along the axis of rotation of the mechanism or parallel to that axis, and wherein extension of the axes of said rollers meet axis of rotation of the collet. The invention consists, further, as a controller of collet, for towers or like machines, comprising rollers with parallel axes, relatively movable, that cooperate to actuate a "toggle" desi and are arranged in cages carried by the spindle of the machine, such that the centrifugal forces resulting from the rotation of the pin have no appreciable effect on the rollers in the direction of their relative movement which provides the aforementioned toggle action. The below will describe the invention in more detail by referring to the accompanying drawings on which: Figure 1 is a side view, with axial section, of a control device of collet according to the invention; Figure 2 is a plan view (with the broken portion perspective); Figure 3 is an end view partial line 3-3 (fig. 2). In implementing the invention in the form of advantageous embodiment represented in the drawings, there is provided a control part J, coil-shaped, mounted to slide on the spindle The socket 630,410. Chucks. CHURCHILL & CO., Ltd., C., and MOULD, C. H. Oct. 24, 1947, No. 28473. [Class 83 (iii)] A collet-operating device comprises a plurality of pairs of reaction rollers 8 having their axes extending substantially radially from the collet axis, the rollers 8 being disposed in cages 16 between fixed and movable elements 9, 11 respectively, and each pair of rollers being contacted by a pressure roller 7 which is actuated by a cam 5, associated with a sliding sleeve 3, to force the rollers 8 further apart and cause axial movement of the element 11 with consequent movement of the collet tube 13. The cams 5 are operated in the reverse direction to release the grip by means of pins associated with the sliding sleeve 3. Specification 614,905 is referred to. 1° Rollers are used to produce movement of a part of the control mechanism of the collet along the axis of rotation of said mechanism or parallel to that axis, and the extended axes of the rollers meet l? axis of rotation of the collet; 2° The axes of the rollers are substantially perpendicular to the axis of rotation of the collet; 3° The device comprises two members which are relatively movable in a direction parallel to the axis of rotation of the collet and a series of rollers with parallel axes are arranged between these two elements and extending substantially radially relative to the axis of rotation of the collet; 4° Two rollers spaced apart reaction respectively correspond to the two relatively movable members and a thrust runner is provided in contact with these two rollers reaction the gap is smaller than the diameter of the pushing roller; 5° A cam device is provided for forcing the pushing roller reaction between the rollers so as to separate them positively and to thereby effect axial separation of the two relatively movable members; 6° There are two sets of rollers each comprising two reaction rollers and a thrust runner interposed, and a double cam device is arranged between the two rollers and thrust acting simultaneously on them; 7° The cam device includes a truncated triangular cross section, having sloped surfaces designed to slide against the rollers push is moved. in a direction parallel to the axis of rotation of the collet; 8° is provided four sets of rollers distributed in two pairs are formed in diametrically opposite positions, each pair having a cam device 9° One of the elements is set such that it cannot be moved axially on the spindle of the machine and the other, movable relative to the first, is connected to the control device of the collet; 10° The two elements are biased towards one another by a spring device; 11° The device comprises rollers with parallel axes which are movable relative to each other and interact in actuating a mechanism of the genus Society said: & C Limited Charles CHURCHILL° and Charles Harry [...]. For [...] is: [...], [...], [...] and Ρ [...][...]. For the sale of the fascicles, be directed to I ' Imprimerie Nationale, 27, the street Convention, Paris (15e). Ministry
Industry and commerce
The control mechanism for lathe chuck. f ' r-