Metrological assurance the technological production process and quality control of the grinding balls

29.03.2017

Metrological assurance the technological production process and quality control of steel grinding balls should comply with Table. 1.

Table.1. Metrological assurance the technological production process and quality control of the grinding balls

Technological operation	Controlled parameter	Measurement units	Measuring tools	Measurement range	Accuracy class, graduation value	Measuring tool error
1	2	3	4	5	6	7
Loading billet into the furnace	Billet diameter Billet length Billet curvature	mm mm mm	Slide Calipers GOST 166 Measuring roulette GOST 7502 Measuring ruler GOST 427	0-300 0-10000 0-150	2class, 0,1 3 class, 1,0 1,0	± 0,5
Billet heating at induction furnace	Billet temperature at the furnace exit	⁰С	Photo Pyrometer «Quartz-M»	0-1300		± 1
Acceptance of rolling rolls	Caliber dimensions in the calibration section	–	Cake Size Patterns			± 0,5
Rolling rolls setting	Rolling rolls inclination angle	⁰С	Arrowhead with a degree scale		0,5
The rolling: – Rolling temperature regime – Rolling control process	Metal temperature before rolling Grinding balls diameter	⁰С mm	Photo Pyrometer «Quartz-M» Slide Calipers GOST 166	0-1300 0-250	2 class, 0,1	± 1 ± 0,5
Grinding balls quality control	Grinding balls hardness Grinding balls diameter Impact resistance	HRC, НВ mm J	Hardness tester НRA-2 Emco Test Slide Calipers GOST 166 Copper installation of vertical type	20-70 0-250 0-6737,5	2 class, 0,1	± 2 ± 0,5
Grinding balls thermal hardening	Drum rotation frequency Movement rate of the chain bucket conveyor	V (volt) m/с		2……9 0,06…0,3
	Grinding balls self-release duration	hour	Clock	0-96	0,1
Shipment	Grinding balls mass	tone tone	Carriage scales PC-150TS13V1 Tensiometric, non-foundational, automobile scales PULSAR 2.791.029 RE	7,5-150 0,6-60	0,05 Normal	From ± 20kg Tо ± 60kg

Allowed to use newly developed or other similar means of measuring equipment that meet the accuracy requirements of the instruction, attested in the established order.