{"id":4383,"date":"2018-10-25T15:47:32","date_gmt":"2018-10-25T13:47:32","guid":{"rendered":"http:\/\/www.spd.it\/machine-tools-clamping\/milling\/polarita\/"},"modified":"2023-12-06T13:53:03","modified_gmt":"2023-12-06T12:53:03","slug":"polarity","status":"publish","type":"page","link":"https:\/\/www.spd.it\/en\/products\/workholding\/milling\/polarity\/","title":{"rendered":"Polarity"},"content":{"rendered":"
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\r\n IMPORTANCE OF THE POLE PITCH<\/h2>\r\n\r\n
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The real reason for choosing a magnetic chuck over another is the ideal<\/em> pole pitch<\/strong> for the work-piece<\/p>\n<\/div>\n<\/div> <\/div>\n <\/div>\n<\/section>\n

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\r\n SQUARE POLE<\/h3>\r\n\r\n
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Each square pole consists of a steel cube that acts as a force collector in which only one of the six<\/p>\n

sides actively takes part in the work surface while the other 5 are completely covered with permanent magnets.<\/p>\n

This corresponds to a high concentration of force, in a five-to-one ratio.<\/p>\n<\/div>\n<\/div> <\/div>\n <\/div>\n<\/section>\n

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DOUBLE MAGNETIC FLUX<\/strong><\/p>\n

Static permanent magnets are located along the sides of the poles, while invertible magnets are located underneath the same.<\/p>\n

The coils around the invertible magnets quickly generate an electromagnetic field that reverses their polarity in fractions of a second. The resulting total flux of the chuck can be directed outwards towards the work-piece to be clamped (magnetising phase<\/strong><\/em>) or short-circuited inside the chuck (demagnetising phase<\/strong><\/em>), thus eliminating any magnetic residue from the contact surface to\u00a0release the work-piece.<\/p>\n<\/div>\n<\/div><\/div><\/div>

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CHESSBOARD ARRANGEMENT<\/strong><\/p>\n

The poles are laid out in a chessboard<\/strong> pattern<\/strong><\/em>, and are obtained by alternating North and south polarities. The magnets arranged this way generate the clamping force when activated.<\/p>\n

Activation occurs using an electronic control device, and its duration is less than one second. The magnetic module will then remain active, without any further energy supply for as long as necessary.<\/p>\n<\/div>\n<\/div>

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\r\n MAGNETIC CIRCUIT<\/h4>\r\n\r\n
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The magnetic\u00a0chucks are available in two different versions to offer the widest possible coverage for\u00a0any clamping requirements.<\/p>\n

The A1 version<\/strong> with high magnetic field density is suitable for all types of work on laminated parts.<\/p>\n

The A2 version<\/strong> offers a higher magnetic field density allowing large removals even on work-pieces with\u00a0uneven surfaces\u00a0(e.g.\u00a0forged, steel or cast iron\u00a0pieces).<\/p>\n

Applying pole extensions to this type of chucks, guarantees a reduced power loss.<\/p>\n<\/div>\n<\/div>

\r\n NEUTRAL RIM<\/h4>\r\n\r\n
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The external frame of the\u00a0chuck, besides containing the components, has also the function of conveying the magnetic fluxes and isolating the active surface of the\u00a0chuck from the machine.<\/p>\n

The result is a total magnetic insulation<\/strong><\/em> that avoids the phenomena of chips sticking to the tool due to dispersed fluxes.<\/p>\n<\/div>\n<\/div> <\/div>\n <\/div>\n<\/section>\n

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\r\n POLARITY<\/h4>\r\n\r\n<\/div>

POLE 50<\/h4>Characterised by its extraordinary clamping versatility that makes it suitable for processing small or thin work-pieces (with a minimum thickness of 8 mm), with both unfinished and finished surfaces.<\/div><\/div><\/div><\/div>

POLE 70<\/h4>It is suitable for all kinds of machining on medium and large size work-pieces with thickness greater than 20 mm.<\/div><\/div><\/div><\/div>

POLE 32<\/h4>Suitable for small and very thin work-pieces on high-speed machining centres.<\/div><\/div><\/div><\/div> <\/div>\n <\/div>\n<\/section>\n
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\r\n LINEAR POLE<\/h3>\r\n\r\n
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The linear pole, thanks to its modular design, allows to obtain chucks of different sizes and high power.<\/p>\n

Its clamping surface is defined by parallel poles that guarantee greater versatility in clamping work-pieces<\/p>\n

with low thickness and complex designs.<\/p>\n<\/div>\n<\/div> <\/div>\n <\/div>\n<\/section>\n

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DOUBLE MAGNETIC FLUX<\/strong><\/p>\n

Static permanent magnets are located along the sides of the poles, while invertible magnets are located underneath the same.<\/p>\n

The coils around the invertible magnets quickly generate an electromagnetic field that reverses their polarity in fractions of a second. The resulting total flux of the chuck can be directed outwards\u00a0towards the work-piece to be clamped (magnetising phase) or short-circuited inside the chuck (demagnetising phase), thus eliminating<\/strong> any magnetic residue<\/strong><\/em> from the contact surface to\u00a0release the work-piece.<\/p>\n<\/div>\n<\/div><\/div><\/div>

\n \n \"\" <\/a>\n <\/div>\n<\/div> <\/div>\n <\/div>\n<\/section>\n
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PARALLEL POLES ARRANGEMENT<\/strong><\/p>\n

The longitudinal poles are laid out parallelly<\/strong><\/em>, alternating between north and south polarities. The magnets arranged this way generate the clamping force when activated.<\/p>\n

Activation occurs using an electronic control device, and its duration is less than one second. The magnetic module will then remain active, without any further energy supply for as long as necessary.<\/p>\n<\/div>\n<\/div>

<\/div><\/div><\/div> <\/div>\n <\/div>\n<\/section>\n
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\r\n NEUTRAL RIM<\/h4>\r\n\r\n<\/div>
<\/div>
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The external frame of the\u00a0chuck, besides containing the components, has also the function of conveying the magnetic fluxes and isolating the active surface of the\u00a0chuck from the machine.<\/p>\n

The result is a total magnetic insulation<\/strong><\/em> that avoids the phenomena of chips sticking to the tool due to dispersed fluxes.<\/p>\n<\/div>\n<\/div>

<\/div> <\/div>\n <\/div>\n<\/section>\n
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\r\n POLARITY<\/h4>\r\n\r\n<\/div>
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POLE 30<\/h4>Combines the advantages of the linear pole with the strength and width of the square pole accessories.<\/div><\/div><\/div><\/div>

POLE 8<\/h4>Extends the use of the electro-permanent system in milling to small-sized and thin work-pieces.<\/div><\/div><\/div><\/div>
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\r\n Let’s make the magnetic solution you need. <\/h3>\r\n\r\n

\r\n Maximum customisation is SPD\u2019s real plus.<\/h3>\r\n\r\n[vc_btn title=”CONTACT US” style=”flat” shape=”square” align=”center” css=”.vc_custom_1548249127439{padding-bottom: 90px !important;}” link=”url:http%3A%2F%2Fwww.spd.it%2Fen%2Fcompany-contacts%2F|||”]<\/div> <\/div>\n <\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"IMPORTANCE OF THE POLE PITCH The real reason for choosing a magnetic chuck over another is the ideal pole pitch for the work-piece SQUARE POLE Each square pole consists of a steel cube that acts as a force collector in which only one of the six sides actively takes part in the work surface while","protected":false},"author":1,"featured_media":7998,"parent":4373,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4383","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nPolarity - SPD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.spd.it\/en\/products\/workholding\/milling\/polarity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Polarity - 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