公开(公告)号：WO2019116185A1

公开(公告)日：2019-06-20

申请号：PCT/IB2018/059765

申请日：2018-12-07

Applicant: MANDELLI SISTEMI S.P.A. ,  CONSORZIO MUSP ,  POLITECNICO DI MILANO

Inventor： ALBERTELLI, Paolo

IPC: G05B19/19

CPC classification number: G05B19/19 ,  G05B2219/41229

Abstract: Described is method for reducing vibrations originating in a mechanical processing for removal of swarf comprising monitoring the vibration which results from the contact between the tool (103) and a workpiece (WP) 5 being processed, detecting the occurrence of a regenerative vibratory phenomenon, calculating the frequency of the vibratory phenomenon (f C ), estimating a value representing a resonance frequency (f R ) of the machine as a function of the frequency of the vibratory phenomenon (f C ) and determining at least one threshold value (ω TR ) on the basis of the value 10 representing a resonance frequency (f R ). The method also comprises comparing the operating speed (ω L ) of the mandrel (102) with the threshold value (ω TR ) and reducing the intensity of the vibratory phenomenon by the performance of a first reduction strategy (SST) based on a correction of the operating speed (ω L ) when the operating speed (ω L ) 15 of the mandrel (102) is greater than the threshold value (ω TR ) or by means of a second reduction strategy (SSV) based on a continuous modulation which imparts an oscillation to the speed around the value of the operating speed (ω L ), when the operating speed (ω L ) of the mandrel (102) is less than the threshold value (ω TR ).

公开(公告)号：WO2017060822A1

公开(公告)日：2017-04-13

申请号：PCT/IB2016/055946

申请日：2016-10-05

Applicant: MANDELLI SISTEMI S.P.A.

Inventor： MULAZZI, Francesco ,  POZZOLI, Edoardo

IPC: B23Q1/52 ,  B23Q1/56 ,  B23Q5/00

CPC classification number: B23Q1/525 ,  B23Q1/56 ,  B23Q5/00 ,  B23Q2220/006

Abstract: Described is a spindle-mounting head for a machine tool comprises a supporting body (2) comprising at least one arm (3) protruding up to its own end portion (3a), a tool-mounting spindle (6) rotatably connected to the arm (3) at the end portion (3a) to rotate about an axis of oscillation (A), wherein the spindle (6) comprises a tool-mounting body (6a) rotatable about its own machining axis (B) at right angles to the axis of oscillation (A). The head also comprises movement means (9) operatively interposed between the arm (3) and the spindle (6) to rotate it about the axis of oscillation (A), wherein the movement means (9) comprise at least one gear (10) constrained to the spindle (6) and coaxial with the axis of oscillation (A), a first (11) and a second motor (12) both housed in the arm (3) and coupled to the gear (10) at, respectively, a first and a second angular position in order to transmit rotary motion to the gear (10) about the axis of oscillation (A) and a control unit (13) associated with the first (11) and the second motor (12) and configured to control them in a complementary fashion to move the gear (10) and at the same time reduce the clearances.

Abstract translation: 描述了一种用于机床的主轴安装头，包括支撑体（2），其包括突出到其自身端部（3a）的至少一个臂（3），可旋转地连接到臂的工具安装心轴 （3）在所述端部（3a）处围绕振动轴线（A）旋转，其中所述心轴（6）包括可以围绕其自身的加工轴线（B）旋转的工具安装体（6a），所述工具安装体 振动轴（A）。 头部还包括可操作地插入在臂（3）和心轴（6）之间以围绕振动轴线（A）旋转的移动装置（9），其中移动装置（9）包括至少一个齿轮（10） 被限制到主轴（6）并与振动轴线（A）同轴，第一（11）和第二电动机（12）都分别容纳在臂（3）中并分别联接到齿轮（10） 第一和第二角位置，以便围绕振动轴线（A）传递旋转运动到齿轮（10）和与第一电动机（11）和第二电动机（12）相关联的控制单元（13） 以互补的方式控制它们以移动齿轮（10）并同时减少间隙。

公开(公告)号：WO2018100474A1

公开(公告)日：2018-06-07

申请号：PCT/IB2017/057381

申请日：2017-11-24

Applicant: MANDELLI SISTEMI S.P.A.

Inventor： GELLINI, Saverio

IPC: B23Q1/28 ,  B23Q16/10 ,  F16D63/00 ,  B23Q11/00

Abstract: Described is a system for moving a tool in a machine tool, comprising a frame (102), a member (103) movable relative to the frame along or about an axis of movement (M), a unit (104) for transmission of the rotating motion operatively interposed between the frame (102) and the movable member (103), a hydraulic stop unit (105) operatively interposed between the frame (102) and the movable member (103) and a control unit (12) associated with the transmission unit (104) and with the stop unit (105) for controlling them. The stop unit (105) comprises at least a first element (106) rigidly connected to the frame (102), at least a second element (107) rigidly connected to the movable member (106) and a hydraulic actuation circuit (13) configured for moving the first (106) and the second element (107) towards and/or away from each other according to a command issued by the control unit (12), wherein the control unit (12) is configured for selectively controlling the hydraulic actuation circuit (13) at a first pressure (P1), in which it generates a first contact force between the first (106) and the second element (107), or at a second pressure (P2), in which it generates a second contact force between first (106) and second element (107), greater than the first pressure (P1).