CN2186737Y

CN2186737Y - Detatchable column type polar cap electrical permanent-magnet suction cup

Info

Publication number: CN2186737Y
Application number: CN 94208524
Authority: CN
Inventors: 徐式逴
Original assignee: Science And Technology Information Inst Tianjin Machine-Building Industry Admi
Current assignee: Science And Technology Information Inst Tianjin Machine-Building Industry Admi
Priority date: 1994-04-21
Filing date: 1994-04-21
Publication date: 1995-01-04
Anticipated expiration: 2004-04-21

Abstract

The utility model relates to a detatchable column type polar cap electrical permanent-magnet suction cup which is characterized in that after a common magnetic yoke and a matrix type magnetic unit are fixed on a base, unsaturated resin is cast, and a column type polar cap is fixed on the base through screws on an armature in the matrix type magnetic unit; the column type polar cap is connected with a controller by using the wires of a junction box through the junction box is arranged on a suction cup. The utility model has the advantages that the suction force is big and the power-off danger does not exist between a machined workpiece and the suction cup, the suction cup has less energy consumption, and the hot deformation is small; in addition, the peripheral welding slag burr of a plate which is blanked directly owing to gas cutting can be avoided in the process of machining.

Description

Detatchable column type polar cap electrical permanent-magnet suction cup

The utility model belongs to a kind of H01F magnet class technology, particularly relates to a kind of detachable pillar polar caps electricity permanent magnetism powerful electromagnetic chuck.

In the known technology, though the application of various magnetic chucks is can save the carman of workpiece greatly the time; Simultaneously to approaching more outstanding its advantage that is installed of flat workpiece.But still also have deficiency, the first is because the magnetic potential of structure design own is high and power is big, then the power consumption of sucker greatly and temperature rise and thermal deformation also big.It two is to meet when having a power failure, and has dangerous accident and takes place, and is not suitable for processing in addition for the workpiece that accuracy requirement is arranged.It three is for the plate by the direct blanking of autogenous cutting, owing to its peripheral welding slag burr makes sucker be difficult for sucking.

The purpose of this utility model is to overcome the deficiency of known technology and the electric permanent magnetism powerful electromagnetic chuck that a kind of power consumption is little, suction is strong and reliability is high and have detachable pillar polar caps is provided.

The purpose of this utility model is achieved in that

Public yoke fixedly is housed around base plate, 4～100 magnetic force unit of matrix form fixedly are housed on the base plate in public yoke, pour into a mould unsaturated polyester integral with it after forming above-mentioned integral structure, respectively detouchable pillar polar caps can be housed fixedly by the screw on the armature in each magnetic force unit, be wired to controller by the connection box 6 that is contained on the sucker P again.

The structure of described magnetic force unit is, is that the periphery of the reversible magnetic body of aluminium nickel cobalt is with excitation coil at material, is inlaid with material around installing with screw by excitation coil and is the armature of main magnet of the nd-fe-b of rare earth permanent-magnetic material.

Control loop is in the controller, the source of AC that two-phase is 380 volts charges to reservoir capacitance C through rectifier cell Z and current-limiting resistance R respectively, reservoir capacitance C passes through positive duplex contact QA and anti-phase duplex contact TA respectively, and positive duplex contact QA and anti-phase duplex contact TA provide positive pulse and negative going pulse to sucker P respectively.

The utility model has the advantages that, but owing to have matrix form magnetic force block construction and combination in any, main magnet is wherein selected the nd-fe-b of rare earth permanent-magnetic material for use; Therefore reversible magnetic body aluminium nickel cobalt material makes the danger that suction is big and nothing is cut off the power supply between processed workpiece and the sucker, and Applicable scope is extensive, both can be used in the detailed manufacture, can be used on again in the direct processing of the gentle cutting plate spare of pallet.Work in-process can be avoided because the plate periphery welding slag burr of the direct blanking of autogenous cutting in addition.Because reversible magnetic body in the utility model and public yoke can form interior magnetic loop, then remain in the interior magnetic flux of workpiece seldom, thereby remanent magnetism is few again, the sucker energy consumption is little and thermal deformation is also little.

The utility model has following accompanying drawing:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an A-A cross-sectional view among Fig. 1;

Fig. 3 is the schematic circuit diagram of the utility model middle controller.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

Around base plate 7, fixedly mount public yoke 4, be fixed with 4～100 magnetic force unit of matrix form on the base plate in public yoke, present embodiment is selected 32 magnetic force unit for use, forms a matrix form by four magnetic force unit, so present embodiment has been formed 8 matrix forms.Form behind the above-mentioned integral structure cast unsaturated polyester 2 and mutually combine and be integral, can fixedly mount detouchable pillar polar caps 1 respectively by the screw 9 on the armature 3 in each magnetic force unit, by being contained in the connection box 6 on the sucker P, be connected to controller again with its lead.Described magnetic force block construction is, is with excitation coil 10 in the periphery of reversible magnetic body 8, is inlaid with the armature 3 of main magnet 5 around installing with screw 11 by excitation coil, and wherein said reversible magnetic body material is elected aluminium nickel cobalt as; Main magnet material is elected the nd-fe-b of rare earth permanent-magnetic material as.Described in addition controller inner control loop is, 380 volts of source of ACs of two-phase are respectively after current-limiting resistance R and rectifier cell Z half wave rectification, to reservoir capacitance C charging, utilize the energy storage of capacitor C to provide positive pulse and negative going pulse through positive duplex contact QA and anti-phase duplex contact TA to sucker P respectively.

Principle of work of the present utility model is: by the positive duplex contact QA on the controller positive pulse is introduced excitation coil and carry out excitation, make reversible magnetic body carry out adhesive to the workpiece of putting on the polar caps, putting into of its polar caps can no longer be a big plane and can make sucker P according to workpiece size or shape approbate and reprobate.For example when processing the plate of autogenous cutting blanking, can avoid the influence of the peripheral welding slag of workpiece; Change the combination of polar caps in addition, can also make position block, also can process the local projection workpiece.Workpiece by adhesive after, again because armature is subjected to the effect of multiaspect magnet (matrix form), also to the workpiece adhesive, so adhesive face magnetic flux density is very high, has produced very big suction by polar caps.When needs demagnetize, by the anti-phase duplex contact TA on the controller, negative going pulse is introduced excitation coil carry out demagnetization, make reversible magnetic body change polarity, the magnetic flux of main magnet then makes reversible magnetic body and public yoke form interior magnetic loop through armature, because magnetic flux is forced to change its course, make to remain in the interior magnetic flux of workpiece seldom, so remanent magnetism is minimum.

Claims

1, a kind of detachable pillar polar caps electricity permanent magnetism powerful electromagnetic chuck, be by base, public yoke, the magnetic force unit, armature, polar caps, controller is formed, it is characterized in that: around base plate 7, be installed with public yoke 4,4～100 magnetic force unit of matrix form fixedly are housed on the base plate in public yoke, pour into a mould unsaturated polyester 2 integral with it after forming above-mentioned integral structure, can fixedly mount detouchable pillar polar caps 1 respectively by the screw 9 on the armature 3 in each magnetic force unit, by being contained in the connection box 6 on the sucker P, be connected to controller again with its lead.

2, powerful electromagnetic chuck according to claim 1, it is characterized in that: the structure of magnetic force unit is, at material is that the periphery of the reversible magnetic body 8 of aluminium nickel cobalt is with excitation coil 10, is inlaid with material around installing with screw 11 by excitation coil and is the armature 3 of main magnet 5 of the nd-fe-b of rare earth permanent-magnetic material.

3, powerful electromagnetic chuck according to claim 1, it is characterized in that: control loop is in the controller, the source of AC that two-phase is 380 volts charges to reservoir capacitance C through rectifier cell Z and current-limiting resistance R respectively, reservoir capacitance C passes through positive duplex contact QA and anti-phase duplex contact TA respectively, and positive duplex contact QA and anti-phase duplex contact TA provide positive pulse and negative going pulse to sucker P respectively.