70 results about "Turret" patented technology

The invention relates to the technical field of tool turrets, in particular to a numerical control power tool turret which comprises a turret frame and a turret base, the turret base is connected to the turret frame in a sliding mode, the turret frame can move in the horizontal transverse and longitudinal direction, a turret body is installed on the turret base, a roller pin is arranged on the turret base corresponding to the turret frame, and an embedding groove is formed in the turret base corresponding to the roller pin. The roller pins are embedded in the embedding grooves, and the roller pins can abut against the tower in the embedding grooves. The tower base is connected to the tower frame in a sliding mode, the tower frame can move in the horizontal transverse and longitudinal direction, flexible movement of the tool turret in the horizontal transverse and longitudinal direction can be achieved, the tool turret body is installed on the tower base, machining operation is facilitated, the tower base abuts against the tower frame through the roller pin, the roller pin is embedded in the embedding groove, and the roller pin can rotate. Therefore, the friction between the original tower base and the tower frame can be converted, so that the friction between the tower base and the tower frame is reduced, the sliding of the tower base on the tower frame is smoother, and the condition that the tower base and the tower frame are damaged due to repeated friction after being used for a long time is reduced.

The invention discloses a machining position correction system and a control method thereof.The system comprises a base, a turret clamping mechanism and a sliding table mechanism, at least one machining station is arranged on the base, a positioning device and the sliding table mechanism are arranged at the machining station, and the sliding table mechanism comprises a machining assembly and a calibration probe assembly; the machining assembly can reciprocate in the first direction of the machining station, the sliding table mechanism reciprocates in the radial direction of the turret clamping mechanism, a clamping assembly is arranged on the turret clamping mechanism, a calibration device is arranged on the clamping assembly, and the turret clamping mechanism drives the clamping assembly to rotate to the machining station. The calibration probe assembly detects the positioning device and the calibration device so as to determine the position offset of the clamping assembly relative to the machining station. The control precision of the rotation angle of the turret clamping mechanism is compensated, and the machining precision of machining equipment is improved.

The application discloses a kind of single-point mooring chain and anchor chain disc connection damage monitoring and inhibiting device and method, it is related to the inner turret type single-point mooring safety monitoring and protection technical field, the device is set in the tower body structure under the turret of the inner turret type single-point mooring system, including: motion measurement module, contact load measurement module, mooring chain measurement module, collaborative control module and inhibiting drive module, motion measurement module is used to obtain the motion characteristics of turret;Contact load measurement module is used to measure contact interface load and wear amount;Mooring chain measurement module is used to obtain chain body posture and tension;Collaborative control module carries out damage grade determination and instruction output;Inhibiting drive module executes pre-tightening force adjustment, mechanical locking and wear compensation to realize hierarchical inhibition.The application solves the problem of insufficient in-situ monitoring capability of contact interface in the prior art, lack of active inhibition means, realizes in-situ perception, intelligent determination and hierarchical inhibition of intelligent control of the damage of mooring chain and anchor chain disc connection.

The utility model relates to the technical field of battery production and manufacturing, in particular to a turret mechanism and a winding device, and the turret mechanism comprises a rack, a roll changing unit, two supporting units and two bracket units. The roll changing unit is arranged on the rack and comprises a first turret structure and a second turret structure. The two supporting units are connected with the first turret structure and the second turret structure respectively, each supporting unit comprises a supporting plate, and each supporting plate is provided with a limiting terminal. The two support units are arranged on the rack, each support unit comprises a limiting piece, each limiting piece is provided with a limiting groove, and the limiting terminal enters the limiting groove to form limiting. The winding device comprises winding shafts and the turret mechanism, one end of each winding shaft is connected to the first turret structure, and the other end of each winding shaft is connected to the second turret structure. According to the turret mechanism and the winding device, the position deviation of the winding shaft can be avoided, normal production is guaranteed, and the production efficiency is improved.

The application discloses a turret type bulk material patching machine, which comprises a rack, a die bonding table assembly, a bonding head assembly, a pressing assembly, a visual assembly, a vibration disc feeding assembly, a sorting assembly and a micro-motion separation platform which are installed on the rack, the bonding head assembly comprises a rotating disc, a rotating disc driving element and a swing arm, the swing arm comprises a mounting seat, a connecting seat and an elastic plate, the mounting seat is fixedly connected with the rotating disc, one end of the elastic plate is fixedly connected with the connecting seat, the other end of the elastic plate is provided with a suction nozzle, and the connecting seat is fixedly connected on the elastic plate and close to one side of the suction nozzle; the pressing assembly comprises a pressing block and a lifting driving element, and a pressure bearing element is arranged on the connecting seat. The turret type bulk material patching machine adopts the elastic swing arm to replace the swing arm integrated with a sliding block structure, and the pressing structure and the swing arm structure are separated, so that the weight of the swing arm is reduced, the swing arm can rotate faster, and the production efficiency is improved.

The invention relates to an anti-polarization positioning mechanism for the tail end of a composite turning and milling lifting tool turret. The anti-polarization positioning mechanism comprises a supporting frame, a tool turret module and an anti-polarization positioning module. A protruding ring is arranged on the outer side of the supporting frame, and the annular base of the tool turret module is rotationally installed on the protruding ring. The anti-polarization positioning module is arranged between the annular base and the convex ring and comprises an end face fluted disc set, a floating sleeve and a driving control assembly. Wherein the fixed fluted disc is fixed to the end face of the convex ring, the movable fluted disc is axially and movably arranged on the annular base, and the floating sleeve abuts against the movable fluted disc and is driven by the driving control assembly to axially move, so that meshing locking or separation unlocking of the fluted discs is controlled. The positioning and locking mechanism is arranged at the tail end of the tool turret in front, so that a force arm between a cutting force acting point and a locking point is greatly shortened, the overall rigidity of the tool turret is remarkably improved, the problem of tail end polarization under the heavy cutting working condition is effectively solved, and the machining precision and the surface quality are guaranteed.

A precise positioning and adjusting tool between a turret cradle and a high-low speed reducer comprises an L-shaped positioning plate and an adjusting device, the L-shaped positioning plate comprises a first turning face and a second turning face, a plurality of positioning holes are formed in the first turning face, a plurality of eccentric bolts penetrate through the positioning holes and strip-shaped holes formed in the cradle, the L-shaped positioning plate is positioned on the upper surface of the cradle in a matched mode, and the adjusting device is arranged on the second turning face. A plurality of assembling holes for assembling the adjusting device are formed in the second turning surface; the adjusting device comprises a bolt bar, the front end of the bolt bar is a mounting part, the rear end of the bolt bar is a handle, the middle end of the bolt bar is a connecting section, a small-diameter section is arranged between the mounting part and the connecting section, a large-diameter section is arranged between the handle and the connecting section, and external threads are arranged on the large-diameter section; the bolt rod is sleeved with a tubular positioning thread sleeve, the front end of the positioning thread sleeve is a small-inner-diameter end, the rear end of the positioning thread sleeve is a large-inner-diameter end, a flange is arranged on the periphery of the front end of the positioning thread sleeve, the rear end of the positioning thread sleeve is provided with an internal thread used for being matched with the large-diameter section, and the installation part is detachably connected with an abutting head.

The invention relates to a rotary indexing device for manufacturing packaging tubes comprising an indexed turret (1) having a rotation axis (2) and comprising at least a first track (A) and a second track (B), each track (A, B) comprising mandrels (3A,5 3B) arranged on the circumference of the indexed turret (1); the mandrels (3A, 3B) operating successively with stations (4A, 4B); the rotation axis (2) of the turret (1) being horizontal, and the tracks (A, B) being separated from one another by a gap (7) along the rotation axis (2) of the turret (1) and a misalignment (6) in the plane of rotation of the turret (1), said misalignment (6) making all the stations (4A, 4B) and10 the mandrels (3A, 3B) visible and said gap (7) minimizing the rotational inertia of said turret (1).

The utility model discloses an electromechanical conversion device of an ancient mechanical turret clock, which belongs to the technical field of automatic time traveling modes of ancient mechanical turret clocks and comprises a conversion fixed shifting fork and a conversion sliding shifting fork. The conversion fixed shifting fork and the movement output split shaft connecting rod rotate synchronously; the conversion sliding shifting fork is arranged on the conversion connecting rod in a sleeving manner, the conversion sliding shifting fork can slide in the axial direction of the conversion connecting rod, and the conversion sliding shifting fork and the conversion connecting rod synchronously rotate; the switching connecting rod is provided with a sliding shaft sleeve, the sliding shaft sleeve is sleeved with an electromechanical cannon pinion, the electromechanical cannon pinion and the switching connecting rod are both rotationally connected with the sliding shaft sleeve, and the electromechanical cannon pinion is controlled by an electromechanical reduction gearbox to rotate. According to the utility model, the main movement of the mechanical clock can drive the clock hand to travel, and the electromechanical reduction gearbox can also drive the clock hand to travel.

The utility model discloses a kind of positioning device of ladle rotary table, including rotary support platform, rotary frame, ladle main body and positioning support mechanism;Rotary support platform top surface is connected with rotary frame by lifting rotary mechanism, a pair of ladle main body is set, and is respectively fixed by positioning support mechanism limit in rotary frame two sides;Positioning support mechanism includes fixed plate, locating plate and adjusting mechanism, fixed plate is welded and fixed in rotary frame outer wall, locating plate is set in the other side of fixed plate, and mirror image is set with a pair, two locating plates are mutually close or far away under the action of adjusting mechanism, after ladle main body is placed between two locating plates, it is placed stable by the locating groove of locating plate, and the ladle main body of different size is positioned and supported.The utility model is compared with prior art's advantage lies in: by a pair of locating plate and adjusting mechanism, can be automatically adjusted according to ladle size, applicable to the ladle main body of different diameter or external dimensions, improve versatility.

A turret roll forming machine includes at least one turret assembly carrying multiple rows of tooling (e.g., forming rollers), rotatable about an axis to selectively align rows of tooling with an input or output. A transmission is accessible from an exterior of the turret assembly without disassembling of the turret assembly to perform a changeover of roll tooling and / or maintenance on gears, bearings, or shafts of the transmission. Thus, a chain drive may be employed, advantageously accommodating differing rotational speeds for top and bottom forming rollers of each pair of forming rollers, e.g. to reduce roll scuffing. Pairs of forming rollers may be provided as cassettes, which are removably coupleable to the turret assembly allowing quick and easy reconfiguration and / or servicing, minimizing negative effects of changeover. The turret assembly may be a unitary structure (e.g., a weldment) improving rigidity and increasing accuracy of roll forming operations.

This invention discloses a manual / automatic integrated turret fan device and its usage method. The device includes: a waterproof cover, a cavity, a hinged plate, and a ventilation device. The cavity is located inside and connected to the waterproof cover. An movable gap is provided on the inner wall of the waterproof cover corresponding to the opening end of the cavity. The hinged plate is located within the movable gap. A manual drive device and an automatic drive device can drive the hinged plate to detach from or close the opening end of the cavity. When detached, multiple accumulating elastic elements are in a stretched and accumulating state, and a stabilizing suction device is used to maintain the detached state. When closed, multiple accumulating elastic elements rapidly contract, driving the hinged plate to close rapidly. The manual / automatic integrated turret fan device disclosed in this invention can improve the operational stability of turret fan devices.

The utility model discloses a turret unreeling positioning device which comprises a bottom plate, an installation plate and a top plate, sliding grooves are formed in the two sides of the interior of the installation plate, an unreeling roller is installed between installation frames, and a grabbing plate is installed on one side of the front end of an adjusting plate. The sliding grooves are formed in the left side and the right side of the front end of the mounting plate, then the sliding blocks are embedded in the sliding grooves, the grabbing plate can be grabbed according to needs, then the sliding blocks at the bottom of the adjusting plate move along the sliding grooves, the position of the adjusting plate can be adjusted at the moment, and meanwhile after the adjusting plate is provided with the electric telescopic rod, the adjusting plate can be adjusted. After the electric telescopic rod is started to work, the distance of the mounting frame can be driven to be adjusted, so that the distance between the mounting frame and the mounting plate can be adjusted, the unwinding rollers are used for unwinding positioning, the distance between the two unwinding rollers can be adjusted in the working process, and the distance between the two unwinding rollers and the mounting plate can also be adjusted; therefore, the overall adjustment convenience is well improved in the working process.

Disclosed in the present disclosure is a preform dust removal device. The preform dust removal device comprises a turret, a dust collection box, and a dust removal assembly with an air blowing tube, wherein the dust removal assembly is mounted on the turret, the dust collection box is located on one side of the turret, a preform clamping ring is provided on the turret, a guide ring located above the preform clamping ring is further provided on the turret, and the air blowing tube passes through the guide ring; the dust collection box is provided with a dust collection cavity with a constant height and a suction inlet in communication with the dust removal cavity, and the height of the suction inlet is the same as that of the dust collection cavity; a guide face with an arc-shaped axial cross-section is provided at the bottom of the guide ring, and an area between an upper surface of the preform clamping ring and the guide face is in direct communication with the suction inlet. In the present disclosure, the height of the dust collection cavity is set to be constant and consistent with that of the suction inlet, such that when waste gas enters the dust collection cavity from the suction inlet and flows in the dust collection cavity, a gas flow is stable during flowing, turbulence cannot be generated during flowing, smooth flowing of the waste gas in the dust collection cavity is prevented from being affected by the turbulence, the dust collection box can stably collect dust, and the dust collection effect is improved.

The invention relates to the technical field of turning, in particular to thermal compensation high-rigidity horizontal turning center equipment and application thereof.The thermal compensation high-rigidity horizontal turning center equipment comprises a lathe, a tool turret assembly, an auxiliary compensation assembly and a cleaning assembly, the tool turret assembly and the auxiliary compensation assembly are slidably connected to the lathe, and the cleaning assembly is installed on the lathe; a sliding rail is arranged on the lathe, and the tool turret assembly slides to drive the cleaning assembly to work. Through the unique design of the clamping piece in the tool turret assembly, when the stress of a sharpener is increased, the clamping piece can effectively clamp the first sliding base, vibration caused by too large stress of a turret base is prevented, the stability and precision of the machining process are ensured, meanwhile, the auxiliary compensation assembly can slide to a proper position according to the actual length and deformation condition of a workpiece, and the machining efficiency is improved. An additional fulcrum is provided for the workpiece, and the relative position and shape of the workpiece are kept stable.

The utility model relates to a special test assembly for a turret, which comprises a test base, a circuit board and a test unit, the test base comprises a test base body and a fixed connecting piece, the fixed connecting piece is fixedly arranged on the test base body, the fixed connecting piece is provided with a fixed connecting hole, and the fixed connecting hole is provided with an internal thread; a first positioning piece is further fixedly arranged on the fixed connecting piece; a first positioning through hole and a first connecting through hole are formed in the circuit board, and both the first positioning through hole and the first connecting through hole penetrate through the circuit board; when the testing base and the circuit board are fixedly connected together, a first positioning piece of a fixed connecting piece on the testing base penetrates through a first positioning through hole in the circuit board, a fixed connecting hole is aligned with a first connecting through hole, and the first connecting through hole is located over the fixed connecting hole.

The invention relates to a turret device and a machine tool, and the turret device comprises a turntable which is provided with a rotating axis and a plurality of mounting stations which are uniformly distributed around the rotating axis at intervals in the circumferential direction; a plurality of working parts, each mounting station is provided with one working part, and the plurality of working parts at least comprise a measuring part and a cutter part; in the plurality of mounting stations, at least one mounting station is provided with a cutter component, and at least another mounting station is provided with a measuring component; and the driving part is provided with an output end, the output end is in driving connection with the rotating disc so that the rotating disc can rotate around the rotating axis, and the rotating disc rotates by the same angle so that the working parts on the mounting stations can be aligned with the workpieces on the same machining station in sequence. Through the technical scheme provided by the invention, the problem that the control logic of the driving part is relatively complex due to different rotating angles of the turntable and frequently-changed rotating angle requirements when the tower device is switched from the current operation to the next operation in the prior art can be solved.

The application discloses an inner rotating tower slip ring repairing and machining method, which comprises the following steps: step 1, installing a lifting lug; step 2, installing a precision control cross reinforcement; step 3, removing connecting facilities between the inner rotating tower and a floating production storage and offloading device; step 4, placing an inner rotating tower supporting pier on a wharf; step 5, hoisting the inner rotating tower out; step 6, cutting the inner rotating tower; step 7, hoisting the upper part of the inner rotating tower to the inner rotating tower supporting pier; step 8, repairing damaged areas of upper and lower slip rings; steps 9-10, installing corresponding equipment on the upper part of the inner rotating tower and above the lower part of the inner rotating tower; step 11, determining a machining amount; step 12, machining the upper and lower slip rings respectively; step 13, welding the upper part of the inner rotating tower and the lower part of the inner rotating tower to a joint; and step 14, hoisting the inner rotating tower back. The inner rotating tower slip ring repairing and machining method can satisfy repairing and machining of the upper and lower slip rings of the inner rotating tower, can prolong the service life of the inner rotating tower and can guarantee mooring safety of the FPSO.

The utility model discloses a turret mechanism and a reeling and unreeling machine, the turret mechanism comprises two groups of turret assemblies arranged oppositely, each turret assembly comprises a turret main body, a driving shaft and a driven shaft, and the driving shaft and the driven shaft are arranged on the turret main body in a penetrating manner; the first synchronizing wheel and the second synchronizing wheel are respectively sleeved on the driving shaft and the driven shaft; a plurality of first guide wheels are arranged on the inner side wall of the turret main body around the peripheral side of the first synchronous wheel, and a plurality of second guide wheels are arranged on the inner side wall of the turret main body around the peripheral side of the second synchronous wheel; the first guide wheel and the second guide wheel are both located on the side wall of one side in the turret body and are arranged at intervals with the side wall of the other side. The smooth surface of the synchronous belt is wound on all the first guide wheels and all the second guide wheels; the first synchronous wheel and the second synchronous wheel are meshed on the outer side of the synchronous belt; the adjusting part is arranged on the turret main body; the tensioning wheel is in driving connection with the adjusting end of the adjusting piece and abuts against the smooth face of the synchronous belt. The problems that replacement of a synchronous belt in an existing turret mechanism is time-consuming and labor-consuming, and working efficiency is affected are solved.

1. Name of the designed product: ceiling lamp (hexagonal tower). 2. Use of the designed product: indoor lighting. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention discloses a turret type rotary hole burning device which comprises a turret rotary mechanism, a hole burning mechanism, a clamping jaw mechanism and a transmission mechanism, and the turret rotary mechanism rotates relative to a machine base; the multiple hole ironing mechanisms are annularly connected to the turret swing mechanism at intervals, and each hole ironing mechanism comprises two ironing needle assemblies which are arranged at intervals in the vertical direction and relatively slide; the clamping jaw mechanism is connected with the hole ironing mechanism, and the clamping jaw mechanism is arranged between the two ironing needle assemblies and is used for clamping a battery cell; the transmission mechanism comprises a plurality of first transmission ends and a plurality of second transmission ends, the first transmission ends and the second transmission ends are connected with the two ironing needle assemblies which correspond to each other up and down respectively, and the transmission mechanism is in transmission connection with the turret swing mechanism. The first transmission end and the second transmission end drive the two ironing needle assemblies to reciprocate in the direction close to or away from the battery cell. The problem that a center hole of an existing battery is blocked can be solved.

The thin film winding device comprises a wall plate assembly, a rotating tower assembly, a film cutting assembly and a protective cover assembly, the rotating tower assembly comprises a rotating tower left assembly, a rotating tower right assembly, two air expansion shaft assemblies and two driving mechanisms, the rotating tower left assembly and the rotating tower right assembly each comprise an inner rotating disc and an outer rotating disc, each inner rotating disc is of an annular structure, and each outer rotating disc is of an annular structure; a bulge is arranged on the inner side of the inner turntable, the air expansion shaft assembly comprises air expansion shafts, one end of one air expansion shaft is rotationally connected to the bulge of the inner turntable of the left turret assembly, and the other end of the air expansion shaft penetrates through a center hole of the inner turntable of the right turret assembly and is rotationally connected to the outer turntable of the right turret assembly; one end of the other inflatable shaft penetrates through the center hole of the inner turntable of the left turret assembly and is rotationally connected to the outer turntable of the left turret assembly, and the other end of the other inflatable shaft is rotationally connected to the bulge of the inner turntable of the right turret assembly. The two air expansion shafts of the transfer tower assembly can achieve independent revolution and rotation movement, the positions of the air expansion shafts can be adjusted conveniently, the tailing length is shortened, the efficiency of the roll changing action is improved, and continuous rolling work can be achieved.

1. Name of the designed product: arrow tower. 2. Use of the designed product: arrow for game or sports. 3. Design points of the designed product: in shape. 4. Picture or photo showing the design points: perspective view.

The application provides a turret assembly device and an assembly method, the turret assembly device comprises a turret main body, a main body plug clamping and pressing mechanism and a gas bag clamping and pushing mechanism are installed on the turret main body; the main body plug clamping and pressing mechanism is sequentially provided with a first cam ring, a first pressing mechanism and a first clamping mechanism from top to bottom, the gas bag clamping and pushing mechanism is sequentially provided with a second cam ring, a first upper lifting mechanism and a second clamping mechanism from bottom to top, the first clamping mechanism, the first pressing mechanism, the second clamping mechanism and the first upper lifting mechanism rotate synchronously with the turret main body, and the first cam ring and the second cam ring are installed on the turret main body. The innovative turret nozzle assembly device provided by the application can completely realize the integrated assembly line operation of the feeding, assembly and discharging of the main body plug and the gas bag, the whole process does not need manual intervention, the processing efficiency is greatly improved, and the labor cost is saved.

The invention relates to an obstacle detector (50) carried on the front (21A) of a turret and capable of detecting an obstacle in an area (R) on the ground that is located adjacent to the front end of the turret and hidden by the lifting structure from the operator on board the platform, the obstacle detector outputting an electronic signal (s50) indicating directly the presence / absence of an obstacle. An electronic unit (60) processes this electronic signal and operates a warning light (70) accordingly, the warning light being carried by the lifting structure and capable of emitting a light signal (s70) in the direction of the operator who is looking in the vicinity of the aforementioned area.

The application discloses a kind of single-point mooring chain and anchor chain disc connection damage monitoring and inhibiting device and method, it is related to the inner turret type single-point mooring safety monitoring and protection technical field, the device is set in the tower body structure under the turret of the inner turret type single-point mooring system, including: motion measurement module, contact load measurement module, mooring chain measurement module, collaborative control module and inhibiting drive module, motion measurement module is used to obtain the motion characteristics of turret;Contact load measurement module is used to measure contact interface load and wear amount;Mooring chain measurement module is used to obtain chain body posture and tension;Collaborative control module carries out damage grade determination and instruction output;Inhibiting drive module executes pre-tightening force adjustment, mechanical locking and wear compensation to realize hierarchical inhibition.The application solves the problem of insufficient in-situ monitoring capability of contact interface in the prior art, lack of active inhibition means, realizes in-situ perception, intelligent determination and hierarchical inhibition of intelligent control of the damage of mooring chain and anchor chain disc connection.

Lifting platform This lifting platform (1) comprises a self-propelled chassis (10), a platform (30) and a lifting structure (20) which comprises a turret (21), resting on the chassis while being rotatable, and a deployable arm (22) connecting the turret to the platform, extending cantilevered with respect to a rear side (21B) of the turret. An obstacle detector (50), carried by the turret on its front side (21A) and capable of detecting an obstacle located in a region (R) on the ground, located adjacent to the front side of the turret, while being hidden from the operator on board the platform by the lifting structure, provides as output an electronic signal (s50) providing direct information on the presence / absence of an obstacle.An electronic unit (60) processes this electronic signal and accordingly controls a light warning device (70), carried by the lifting structure and capable of emitting a light signal (s70) directed towards the operator looking around this region. Figure for the abstract: 1.

1. Name of the designed product: corner guard (tower shape). 2. Use of the designed product: for corner guard. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

In order to improve the accuracy of a stop position after rotation of a turret, a turret lathe (100) is provided with a drive unit (25) for rotating a turret (22), which has 12 turret surfaces (23) to which tool holders (T) including tools (t) are attached, around an axis (C2), a control unit (34) for controlling the operation of the drive unit (25), and a reception unit (31) for receiving input of information pertaining to a tool layout in which the arrangement state of the tool holders (T) is determined, and for controlling the rotation of the turret (22) around the axis (C2). A center-of-gravity position calculation unit (32) that calculates the center-of-gravity position (M ') of the turret (22) in the tool layout on the basis of input information relating to the tool layout, information relating to the weight and center-of-gravity position of the mounted tool holder (T), and information relating to the weight and center-of-gravity position of the single turret (22); and an eccentricity amount calculation unit (33) that calculates an eccentricity amount (delta) of the center-of-gravity position (M ') with respect to the shaft (C2). The control unit (34) controls the rotational speed of the turret (22) on the basis of the amount of eccentricity (delta).