1.1 This document specifies requirements and test methods for the qualification and re-qualification of laser beam machines for metal powder bed fusion additive manufacturing for aerospace applications.1.2 It can also be used to verify machine features during periodic inspections or following maintenance and repair activities.

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1.1 This document specifies requirements for the qualification of operators of laser metal powder bed fusion machines and equipment for additive manufacturing in aerospace applications.1.2 This document is applicable if the operator qualification testing is required by contract or by application standards in the field of aerospace.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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定价： 590元 / 折扣价： 502 元 加购物车

4.1 Testing machines that apply and indicate torque are used in many industries, in many ways. They may be used in a research laboratory to measure material properties, and in a production line to qualify a product for shipment. No matter what the end use of the machine may be, it is necessary for users to know the amount of torque that is applied, and that the accuracy of the torque value is traceable to the SI. This standard provides a procedure to verify these machines and devices, in order that the indicated torque values may be traceable. A key element to having metrological traceability is that the devices used in the calibration produce known torque characteristics, and have been calibrated in accordance with Practice E2428.4.2 This standard may be used by those using, those manufacturing, and those providing calibration service for torque capable testing machines or devices and related instrumentation.1.1 This practice covers procedures and requirements for the calibration of torque for static and quasi-static torque capable testing machines. These may, or may not, have torque indicating systems and include those devices used for the calibration of hand torque tools. Testing machines may be calibrated by one of the three following methods or combination thereof:1.1.1 Use of standard weights and lever arms.1.1.2 Use of elastic torque measuring devices.1.1.3 Use of elastic force measuring devices and lever arms.1.1.4 Any of the methods require a specific uncertainty of measurement, displaying metrological traceability to The International System of Units (SI).NOTE 1: – for further definition of the term metrological traceability, refer to the latest revision of JCGM 200: International vocabulary of metrology — Basic and general concepts and associated terms (VIM).1.2 The procedures of 1.1.1, 1.1.2, and 1.1.3 apply to the calibration of the torque-indicating systems associated with the testing machine, such as a scale, dial, marked or unmarked recorder chart, digital display, etc. In all cases the buyer/owner/user must designate the torque-indicating system(s) to be calibrated and included in the report.1.3 Since conversion factors are not required in this practice, either english units, metric units, or SI units can be used as the standard.1.4 Torque values indicated on displays/printouts of testing machine data systems—be they instantaneous, delayed, stored, or retransmitted—which are calibrated with provisions of 1.1.1, 1.1.2 or 1.1.3 or a combination thereof, and are within the ±1 % of reading accuracy requirement, comply with this practice.1.5 The following applies to all specified limits in this standard: For purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding method of Practice E29, for Using Significant Digits in Test Data to Determine Conformance with Specifications.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

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This specification covers the material, design, and performance requirements pertinent to the construction of water-driven rotary spray type, stationary rack commercial pot, pan, and utensil washing machines that are manually fed yet automatically controlled to uniformly wash, rinse, and heat-sanitize food preparation utensils. Representative production models of the washers shall pass performance, operation, leakage, and energy and productivity tests, and should function satisfactorily as specified. Certification, product marking, and packaging are also considered.1.1 This specification covers manually fed, spray-type stationary rack, automatically controlled, water-driven rotary spray commercial pot, pan, and utensil washing machines, herein referred to as “the washer.”1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 The following safety hazards caveat pertains only to the test methods portion, Section 9, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This specification covers commercial, electrically operated, bun slicing machines. These slicing machines are classified by type, class, size and style. These machines have three types: Type I is electrically operated with single knife, Type II is electrically operated with dual knife, and Type III is a cluster-bun slicing machine, electrically operated with dual knife. They are also designated into three classes: Class I with a fixed chute, Class II with a adjustable chute, and Class III with automatic/conveyor feed. In terms of size, they come in three kinds: Size I (small), Size II (medium), and Size III(large). In terms of style, they can be classified into three kinds: Style I which is counter top or bench-mounted, Style II which is floor-mounted, and Style III which is portable. Bun slicing machines shall be delivered assembled, ready for mounting, connection to electricity, and use as applicable. The bun slicing machine shall be simple to disassemble and reassemble without special tools or equipment. Requirements for power supply, motor, motor controller, and cutting knife shall be discussed. All components and assemblies of the dough divider and rounder shall be free from dirt and other extraneous materials, burrs, slivers, tool and grind marks, dents, and cracks. Castings, molded parts and stampings shall be free of voids, sand pits, blow holes, and sprues. External surfaces shall be free from kinks, dents, and other deformities. Forming and welding shall not cause damage to the metal and shall be done neatly and accurately.1.1 This specification covers commercial, electrically operated, bun slicing machines.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers the design and performance requirements pertinent to the construction of electrically operated commercial bread slicing machines. Bread slicing machines are classified into types according to feed mechanism, classes according to knife type, and styles into mountability, as follows: Type I—gravity feed; Type II—mechanical single-loaf feed; and Type III—mechanical multiple-loaf feed; Class I—reciprocating knife; Class II—circular knife; Class III—sickle knife; and Class IV—continuous (band) knife; Style I—countertop or stand mounted; Style 2—floor mounted; and Style 3—portable. Representative production models of the bread slicing machines shall pass operational and performance tests, and should function satisfactorily as specified.1.1 This specification covers commercial, electrically operated, bread slicing machines.1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

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