• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The mechanism serves for compensating frame distortions on machine tools, caused by horizontal shifts of heavy machine parts. Cables carry the weight of the carriage and another cable is attached to the carriage after being lead over pulleys to a ram. The pulley is fitted to an hydraulic cylinder which produces an upward-directed force on the piston rod. Due to the hydraulic pressure on the underside of the piston the cylinder is subjected to a downward force by the pulley. Due to the action of the pulleys, this force is changed again into an upward force suspending the opposite end of the carriage.
    公开号:SU893123A3
    申请号:SU792762951
    申请日:1979-02-28
    公开日:1981-12-23
    发明作者:Котта Рамузино Франческо
    申请人:Инноченти Сантеустаккио С.П.А. (Фирма)；
    IPC主号:
    专利说明:

    3 are part of or attached to column 5. The caliper 8 has a horizontal guide 9, on which a slider 10 is movably mounted, carrying a working head 11 The weight of the caliper 8 and the weight of the slider 10 are perceived by the cables 12. The cable 13 or another similar flexible element is fixed at two different points with anti-slip ends and 15 caliper 8. In particular, point 14 is selected at the top of the caliper 8 and near its front wall, while point 15 is selected at the bottom of the caliper 8 and near its rear wall. The straight line, which connects these points k and 15 with each other, forms a predetermined angle with the vertical, passing through each of these points, and the straight segment connecting these points 1 and 15 with each other has a predetermined length the horizontal projection of its b ,. The cable 13 interacts with the rotating guide and return rollers 1b, which are mounted on the crosspiece 6, in addition, the cable 13 located near the point 15, designed to be fixed on the caliper 8, is in contact with the roller 17, which is mounted on the tension device 18, located in a slide 8, Tensioner 18 is installed on foundation 2 outside and independently of the machine. For rollers 16 and 17, such an arrangement is chosen that the end sections of the cable 13, which converge to the points provided for fixing on the support, 1 and 15 are directed vertically, respectively up and down. The roller 17 is conventional and not represented here by a method mounted with both baking the possibility of its rotation on the axis 19. which is directed horizontally and perpendicular to the direction of movement of the slide 10. This axis is mounted at the top of the cylinder 20, in which the piston is rigidly connected in the axial direction The stem 22 is connected to the slider 23 °. The slider 23, via the disk element 2, is connected to the guide 25, which is horizontally aligned in the direction of the shifting column 5 of the machine. The guide 25 is fixed on a predetermined plane by means of 34 several bolts 26 to the disk 27, which is rigidly connected to the foundation 2 by means of extensions 28, acting on the yoke 29, which is laid into the reinforced concrete masonry of the foundation 2. The vertical axis of the cylinder 20, t. e. the vertical axis of the tensioner 18 is at a predetermined distance bj from the vertical of the center of gravity A, belonging to the machine of the base surface k. On the caliper 8, the control curve 30 is fixed, interacting with the position sensor 31, rigidly mounted on the slider 10 and supplying electrical signals to the electronic unit 32. The hydraulic system pressure line 33 is connected to the cylinder below the piston 21. The hydraulic system contains a pump Z. 35, filters Zb and 37. safety valve 38, electro-hydraulic valve 39, pressure sensor tO, pressure gauge tl, drain valve k2, battery 43, controlled non-return valve 44, direction valve 45. The device operates as follows in a way. When the slider 10 is moved, the position sensor 31 interacts with the control curve 30, sends a signal to the electronic unit 32 about a change in the slider position. The pump 34 takes the oil from the tank 35 through the filter Zb. Through filter 37, this oil is directed to a circuit equipped with a safety valve 38. The valve is set to a pressure which is higher than the highest pressure of the oil circuit during operation. In this case, the pressure in the circuit is constantly regulated by an electro-hydraulic valve 39, controlled by an electrical signal from the electronic unit 32, which compares the predetermined pressure value received from the position sensor 31 with the actual pressure value that is transmitted by the pressure sensor 40, built-in into this circuit, and gives a signal to the electrohydraulic valve 39, which allows to maintain the required pressure in the circuit with minimal error. The pressure oil directed into the cylinder ((whereby the pressure can be changed in any way) is affected
    five
    on the lower surface of the piston 21. As a result, the piston 21 acts with a variable and upwardly directed force F through the rod 22 and the disk element 2 onto the guide 25, through which this force is transmitted through the bolts 26 and the disk 27 to the foundation 2,
    Due to the reaction effort, cylinder 20 perceives an equal but opposite direction, i.e. downward force f, which is transmitted to roller 17 and from there to cable 13 associated with said roller. As a result, two cable forces act on the sections of cable 13, when they go to roller 17, both of which are equal downwards. Consequently, while on the toe 15, intended to fasten the cable 13 on the support 8, a force a, / 2, directed downward, acts on the point 14, intended to fix the same cable 13 on the support 8, acts equal to it, directed up. Therefore, the caliper 8 is experiencing the effect of a moment directed to the right and equal to M (/ 2 X b,.
    At the same time, the force F, directed downward and applied to the roller 17, is an external, downward directed force for the system: the base surface k, the column 5 of the center of gravity of the base surface 4 distant from the vertical by a distance equal to bg. This external force G, which is any variable, exerts on the system a column — a base surface — a bed of machine jacks, an impact in the form of a moment directed to the right and equal to M b, which is directed toward the twisting arising in the column due to the bending moment caused slider 10. In addition, it counteracts the draft ((compliance), which the base surface undergoes, the bed, the jacks as a result of the action of the bending moment. For any position, with the slide 10 relative to the slide 8, a measured and downward force can be applied to the roll 17 (which in the state of creating on the slide 8 a bending moment equal to or greater than the moment on the slide caused by the movement of the slide 10 and opposite to it in the direction. Then same effort
    23 "
    fi at the same time in the state to create in the system a column — a base surface — a bed — a machine jack — a moment that eliminates non-matting effects, namely, the impacts that are applied to the column by twisting caused by the same movements of the slide 10. Accumulators 3 perform the functions of maintaining oil pressure in the circuit in cases where there is no power supply to the mains. When the pressure gauge reads the value of the oil pressure in the circuit, which is necessary for each of the 10 positions occupied by the slider relative to the caliper 8, the described circuit is adjusted. This is necessary to determine the required forces Ijg to be applied to the roller 17 .. These pressure values can be kept constant by manually moving the rod belonging to the sensor 31. After the various pressure values that are required for each position are obtained, the slider 10 relative to the caliper 8, and after the accuracy of these values is verified by the achieved, correct elimination of twisting, the control curve is implemented in such a way that the stem of sensor 3 is affected the movements that were previously reported manually, namely in order to obtain at different positions occupied by the slider 10. the pressure value in the pressure circuit
    which provides the required FJL force applied to the roller 17, to eliminate twisting.
    The advantage of this device design is that the vertical (variable) force, which acts on this tensioner roller and is directed downward, provides two equal and opposite forces that act on the points provided for securing the cable to the carrier. moving head. These forces cause in the carrier body the moment that the value (variable when changing the position occupied by the working head) can be simply calculated so that the moment that is caused by the weight of the working head and depends on the position occupied
    7
    : working head on its bearing element. Due to the eccentricity existing relative to the center of gravity and due to the fact that the corresponding reaction force moves to the foundation independently of the machine itself, the said vertical force acts on the machine column with a moment acting opposite to the twisting acting on the column due to the weight and position of the working heads. As a result, the negative effects that occur during twisting on the column, on the base surface, on the bed, and on the machine jacks are eliminated.
    权利要求:
    Claims (1)
    [1]
    1. USSR author's certificate No. i 02t08, cl. B 23 B 47/26, 1971.
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    同族专利:
    公开号 | 公开日
    IT1093134B|1985-07-19|
    IT7820716D0|1978-02-28|
    DE2904350C2|1990-08-09|
    DE2904350A1|1979-08-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3671133A|1970-05-22|1972-06-20|Innocenti Soc Generale|Balance compensated machine tools|IT1178569B|1984-10-04|1987-09-09|Mecof Spa|BALANCING DEVICE FOR MACHINE TOOL|
    CN102380803A|2011-11-03|2012-03-21|芜湖恒升重型机床股份有限公司|Main spindle box gravity center shift compensating device|
    CN103722193A|2013-11-26|2014-04-16|无锡京华重工装备制造有限公司|Counter-weight structure of cross beam|
    CN104148988B|2014-08-04|2016-06-15|苏州大学|Floor-type milling & boring machine main spindle box dynamic equilibrium compensation device|
    EP3009228A1|2014-10-17|2016-04-20|Bostek Innovation S.L.U.|Machine tool with sliding counterbalancing system on a carriage exterior to the machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT2071678A|IT1093134B|1978-02-28|1978-02-28|GLOBAL COMPENSATION DEVICE FOR DEFLECTIONS GENERATED BY HORIZONTAL MOVEMENTS OF MOVING BODIES IN LARGE MACHINE TOOLS|
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