{"id":1450,"date":"2020-10-16T08:53:07","date_gmt":"2020-10-16T08:53:07","guid":{"rendered":"https:\/\/pj4iaixa9m.wpdns.site\/?p=1450"},"modified":"2020-10-16T08:53:09","modified_gmt":"2020-10-16T08:53:09","slug":"control-punch-noise","status":"publish","type":"post","link":"https:\/\/harslepress.com\/cs\/control-punch-noise\/","title":{"rendered":"Jak ovl\u00e1dat hluk \u00faderu\uff1f"},"content":{"rendered":"

Hluk p\u0159i \u00faderu m\u00e1 velk\u00fd vliv na provoz stroje a zdrav\u00ed obsluhy. Pod\u00edvejme se, jak ovl\u00e1dat hluk d\u011brovac\u00edho lisu. N\u00e1sleduje opat\u0159en\u00ed k potla\u010den\u00ed hluku u d\u011brovac\u00edch lis\u016f.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

(1) zdroje zvuku<\/strong><\/p>\n\n\n\n

A. Samotn\u00fd \u00fader<\/p>\n\n\n\n

Ovl\u00e1d\u00e1n\u00ed zdroje zvuku je z\u00e1kladn\u00edm opat\u0159en\u00edm ke sn\u00ed\u017een\u00ed hluku lisovac\u00edho lisu. Richards z Velk\u00e9 Brit\u00e1nie aplikoval teoretick\u00fd v\u00fdzkum n\u00e1razov\u00e9ho hluku na d\u011brovac\u00ed lis, kter\u00fd by mohl hluk sn\u00ed\u017eit o 30 dBA. Z\u00e1kladn\u00ed teorie je, \u017ee hluk zrychlen\u00ed se rovn\u00e1 polovin\u011b kinetick\u00e9 energie stejn\u00e9ho objemu vzduchu poh\u00e1n\u011bn\u00e9ho kladivem v pohybu.<\/p>\n\n\n\n

Kdy\u017e se CTO\/VO zv\u00fd\u0161\u00ed z 1 na 10, hladinu hluku lze sn\u00ed\u017eit p\u0159ibli\u017en\u011b o 30 dBA. C je rychlost zvuku a TO je \u010das, kdy se pohyb kladiva zastav\u00ed. VO je rychlost pohybu kladiva dopadaj\u00edc\u00edho na sochory. Tak velk\u00e9ho sn\u00ed\u017een\u00ed hluku by bylo obt\u00ed\u017en\u00e9 dos\u00e1hnout jin\u00fdm zp\u016fsobem. Koncem 70. let se na sv\u011bt\u011b objevil nov\u00fd typ hydraulick\u00e9ho d\u011brovac\u00edho lisu. D\u011brova\u010d m\u016f\u017ee pracovat podle p\u0159edem stanoven\u00fdch pohybov\u00fdch pravidel, co\u017e v\u00fdrazn\u011b sni\u017euje hlu\u010dnost lisovac\u00edho lisu.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Mezi ka\u017edou p\u0159evodovou \u010d\u00e1st\u00ed d\u011brovac\u00edho lisu a strukturou je nezbytn\u00e1 v\u016fle ulo\u017een\u00ed. Jako nap\u0159\u00edklad ojnice klikov\u00e9ho h\u0159\u00eddele zpomaluj\u00edc\u00ed zp\u011btn\u00e9 proplachovac\u00ed za\u0159\u00edzen\u00ed. Reforma st\u00e1vaj\u00edc\u00edho tradi\u010dn\u00edho n\u00e1vrhu procesu nen\u00ed pro tov\u00e1rn\u00ed \u00fader jednoduch\u00e1; z\u00e1sadn\u00edm zp\u016fsobem je reformovat proces dopadu \u00faderu. Existuje mnoho technick\u00fdch opat\u0159en\u00ed ke sn\u00ed\u017een\u00ed hluku d\u011brovac\u00edho lisu, kter\u00e1 jsou st\u00e1le ve st\u00e1diu experiment\u00e1ln\u00edho v\u00fdzkumu, a bude dlouho trvat, ne\u017e budou pln\u011b vyzr\u00e1l\u00e1 a pln\u011b popularizovan\u00e1.<\/p>\n\n\n\n

B. Sni\u017ete hluk pl\u00edsn\u00ed<\/p>\n\n\n\n

Design\u00e9\u0159i \u010dasto hluk p\u0159ehl\u00ed\u017eeli. Rozumn\u00e1 volba v\u016fle ulo\u017een\u00ed konk\u00e1vn\u00ed a konvexn\u00ed formy m\u016f\u017ee sn\u00ed\u017eit hluk o 5 dBA, zm\u011bnit konvexn\u00ed geometrii a nahradit plochou matrici schodi\u0161\u0165ovou a naklon\u011bnou matric\u00ed, tak\u00e9 sn\u00ed\u017eit hluk o 5-10 dB nebo tak. Proto\u017ee geometrie obrobku je n\u011bkdy velmi slo\u017eit\u00e1, p\u0159in\u00e1\u0161\u00ed ur\u010dit\u00e9 pot\u00ed\u017ee p\u0159i zpracov\u00e1n\u00ed formy. Krom\u011b toho jsou ve form\u011b dal\u0161\u00ed vyrovn\u00e1vac\u00ed pam\u011bti a sni\u017euj\u00ed hluk p\u0159i vykl\u00e1dce a dal\u0161\u00ed opat\u0159en\u00ed.<\/p>\n\n\n\n

(2) \u0158\u00edzen\u00ed \u0161umu cesty \u0161\u00ed\u0159en\u00ed<\/strong><\/p>\n\n\n\n

Technick\u00e1 inovace je pom\u011brn\u011b vysp\u011bl\u00e1 a m\u016f\u017ee dos\u00e1hnout ur\u010dit\u00e9ho \u00fa\u010dinku, aby bylo mo\u017en\u00e9 kontrolovat po\u0161kozen\u00ed hluku lidsk\u00fdm t\u011blem, p\u0159ij\u00edmat kontroln\u00ed opat\u0159en\u00ed ve zp\u016fsobu p\u0159enosu.<\/p>\n\n\n\n

A. Absorpce zvuku a redukce hluku<\/p>\n\n\n\n

\u00da\u010delem absorpce zvuku je oslabit odra\u017een\u00fd zvuk v d\u00edln\u011b. Obecn\u011b sni\u017euje hluk p\u0159ibli\u017en\u011b o 6 dB.<\/p>\n\n\n\n

B. M\u00edstn\u00ed zvukov\u00e1 izolace<\/p>\n\n\n\n

P\u0159ijet\u00ed zvukov\u00e9 izola\u010dn\u00ed clony a zvukov\u011b izola\u010dn\u00edho krytu oblasti pl\u00edsn\u00ed se zvukovou absorpc\u00ed m\u016f\u017ee sn\u00ed\u017eit hluk o 8 dBA.<\/p>\n\n\n\n

C. Pln\u011b uzav\u0159en\u00fd akustick\u00fd kryt<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Efekt redukce \u0161umu pln\u011b uzav\u0159en\u00e9ho zvukov\u00e9ho \u0161t\u00edtu je p\u0159ibli\u017en\u011b 20 dBA. T\u011blo krytu m\u016f\u017ee b\u00fdt sestaveno, obvykle zab\u00edr\u00e1 velkou plochu.<\/p>\n\n\n\n

Hluk kontroln\u00edho razn\u00edku je v p\u0159enosov\u00e9 cest\u011b eliminov\u00e1n, ale je jednoduch\u00fd a snadno ovladateln\u00fd a m\u016f\u017ee m\u00edt lep\u0161\u00ed efekt redukce \u0161umu, tak\u017ee je v\u00edce vyu\u017e\u00edv\u00e1n. Lid\u00e9 mus\u00ed b\u011bhem aplikace v\u011bnovat pozornost provozu, \u00fadr\u017eb\u011b a dal\u0161\u00edm probl\u00e9m\u016fm. P\u0159esto\u017ee probl\u00e9m hluku samotn\u00e9ho obr\u00e1b\u011bc\u00edho stroje nelze vy\u0159e\u0161it okam\u017eit\u011b, st\u00e1le m\u00e1 jednotka k dispozici mnoho kontroln\u00edch opat\u0159en\u00ed pomoc\u00ed razn\u00edku. Vy\u0159e\u0161it po\u0161kozen\u00ed hluku \u00faderu nen\u00ed p\u0159\u00edli\u0161 obt\u00ed\u017en\u00e9, kl\u00ed\u010dem je vid\u011bt d\u016fle\u017eitost veden\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"

Punch noise has a great harm to the operation of the machine and health of operators. Let\u2019s see how to<\/p>","protected":false},"author":4,"featured_media":1454,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[520,519,217],"class_list":["post-1450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-punching-machine","tag-press-noise-control","tag-punch-machine","tag-punch-noise"],"jetpack_featured_media_url":"https:\/\/harslepress.com\/wp-content\/uploads\/2020\/10\/415ed5fbdebef2806ce0ce1385a0fab.png","_links":{"self":[{"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/posts\/1450","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/comments?post=1450"}],"version-history":[{"count":0,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/posts\/1450\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/media\/1454"}],"wp:attachment":[{"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/media?parent=1450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/categories?post=1450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/harslepress.com\/cs\/wp-json\/wp\/v2\/tags?post=1450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}