QB/T 2175.1-1995 General technical requirements for brass-bodied musical instruments

This standard specifies the general technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of brass-bodied musical instruments. This standard applies to various brass-bodied musical instruments forged with copper-tin alloy or other copper alloys. QB/T 2175.1-1995 General Technical Requirements for Brass-bodied Musical Instruments QB/T2175.1-1995 Standard download decompression password: www.bzxz.net

Light Industry Industry Standard of the People's Republic of China
General Technical Requirements for Brass-Bodied Sounding Instruments
Subject Content and Scope of Application
QB/T 2175.1—1995
This standard specifies the general technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of brass-bodied sounding instruments. This standard applies to various brass-bodied sounding instruments forged with copper-tin alloy or other copper alloys. 2 Reference Standards
GB/T466 Classification of Copper
Electrolytic Copper
GB/T 467
GB/T 728
GB/T2828
3 Terminology
Batch-by-Batch Inspection Count Sampling Procedure and Sampling Table (Applicable to Inspection of Continuous Batch) The tone that can express the timbre characteristics of the instrument.
The tone produced when the pronunciation point is struck.
3.3 Transition
The sudden and abnormal fluctuation of sound during the vibration attenuation process. 3.4 Tremolo
The abnormal and periodic continuous fluctuation of sound during the vibration attenuation process. 3.5 Long-tone
When a brass-body musical instrument is struck continuously, the force of the strike is suddenly increased, and the volume and the main tone change accordingly. 3.6 Knife marks
Normal processing marks formed on the surface of the product. 3.7 Heavy leather
Double-layer or multi-layer forging and casting defects appearing on the product. 3.8 Knife wounds
Scars caused by processing tools on the surface of the product that damage the appearance quality of the product or affect the service life. 4 Technical requirements
4.1 Acoustic quality
4.1.1 The main tone of the timbre is obviously concentrated, sonorous and powerful, and the harmonics are rich. 4.1.2 The sound quality has no obvious transition or frontal sound.
Performance: sensitive pronunciation.
The sound decay time is determined according to the specific product. 4.1.4
Approved by China Light Industry General Association on October 24, 1995
Implemented on June 1, 1996
4.2 Appearance quality
QB/T 2175. 1—1995
4.2.1 No missing cuts in the processed parts, no cuts and scratches from abnormal processing. 4.2.2 No sharp corners on the edges of the product.
4.2.3 No heavy skin inside the gong light.
4.3 Materials
Should meet the requirements of GB/T466.
Should meet the requirements of Sn-01 and Sn-1 in GB/T728. 4.3.2 Tin!
5 Test method
5.1 The test should be carried out according to the acoustic quality test and appearance quality test. 5.2 Acoustic quality test
5.2.1 Before the inspection test of the brass-bodied gong, the playing utensils suitable for the product must be selected to give full play to the sound effect of the product. Among them, the percussion-type steel-bodied gongs must be paired and numbered. 5.2.2 According to the acoustic requirements of each product, the acoustic quality of the product shall be judged by playing and listening. a.
When determining the main tone of the gong, the slow long hammer playing method should be used to judge whether the main tone is obviously concentrated and whether the harmonics are rich, and the tight hammer playing method should be used to determine the long tone; b.
The percussion-type gongs should refer to a according to the characteristics of the product; the single-click gongs should be played with a single hammer according to the characteristics of the product; other brass-bodied gongs should be tested according to their characteristics. 5.3 Appearance quality test
Sensory judgment should be carried out according to the requirements of 4.2. 6 Inspection rules
6.1 Defect grade determination
6.1.1 Class A defectswww.bzxz.net
Products with any defect listed in Table 1 shall be deemed unqualified. Table 1
A-type defects
No main sound
Cracks and damage
Non-design perforation
Crack sound"
6.1.2B-type defects
Any product with two defects in Table 2 shall be deemed as unqualified products. Any product with one defect in Table 2 shall be deemed as a popular product. Table 2
B-type defects
Knife wounds, scratches, sharp edges
Missed knives
Transition and tremolo
6.2 This product must be inspected piece by piece before entering the warehouse. 6.3 Delivery inspection shall be carried out in accordance with GB/T2828. The sampling plan shall comply with the provisions of GB/T2828 on normal inspection and one-time sampling. Inspection 65
QB/T 2175.1-1995
Inspection level 1, qualified quality level: Class A unqualified is 2.5, Class B unqualified is 4.0. 6.4 Specially made and customized products that cannot be mass-produced are not subject to 6.3. 6.5 Products must be inspected by the factory inspection department in accordance with this standard and product standards, and must be stamped with qualified marks and grade marks before leaving the factory. 7 Marking, packaging, transportation, storage
7.1 Each product must be printed with a trademark or mark, and the impact-type products must be matched and marked. 7.2 Product packaging should ensure the safety of the product during transportation and storage. 7.3 Product certificates and packing lists must be placed in each packaging box. 7. 4 The product packaging box should indicate the product name, specifications, quantity, weight, factory name, date of manufacture, and obvious signs such as "Handle with care" and "Moisture-proof".
7.5 Moisture-proof and corrosion-proof measures should be taken during product storage. Additional notes:
This standard is proposed by the Quality Standards Department of the China Light Industry General Association. This standard is under the jurisdiction of the National Musical Instrument Standardization Center. This standard is drafted by the National Brass Musical Instrument Technical Cooperation Group. The main drafter of this standard is Fu Siming.
From the date of implementation of this standard, the professional standard ZBY58002.1--1989 "General Technical Conditions for Brass Musical Instruments" issued by the former Ministry of Light Industry will be invalid.
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