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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
The standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Leather of Standardization Administration of China (SAC/TC 252).
This standard is issued as first edition.
Hardware Fitting of Case and Bag - Magnetic Buckle
1 Scope
This standard specifies the terms and definitions, requirements, test methods and inspection rules of magnetic buckle.
This standard is applicable to magnetic buckle for various cases and bags.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
QB/T 2002.1 Technical Specification for Electroplated Layer on Leather Hardware Accessory
QB/T 3821-1999 Adhesion Testing Method of the Metal Deposits for the Light Industrial Products
QB/T 3826 Corrosion-resistant Testing Method of the Metal Deposits and Conversion Coatings for the Light Industrial Products - Neutral Salt Spraying Test (NSS)
QB/T 5086 Magnetic Buckle. Test Method for Resistance to Fatigue
3 Terms and Definitions
For the purposes of this standard, the terms and definitions specified in QB/T 2002.1 apply.
3.1
magnetic buckle
metal buckle products fitted by magnetic force
3.2
fit parts
visible part after assembling of magnetic buckle, which is classified into upper part and lower part, as shown in Figure 1
Figure 1 Schematic Diagram for Fit Parts
4 Requirements
4.1 Appearance quality
4.1.1 Product surface is smooth and free of obvious dent, scratch or stain, and its edge is regular and color is uniform.
4.1.2 Coating surface shall be free from obvious pinhole, discoloration, pitting, peeling, burn, scaling, blistering, skip coating or serious mechanical damage.
4.1.3 Pattern and characters are clear.
4.1.4 The fitting is flat, smooth and regular.
4.2 Physical and chemical properties
It shall meet the requirements specified in Table 1.
Table 1 Physical and Chemical Properties
S.N. Item Requirements
1 Fit force/N ≥ 8
2 Tensile strength /N ≥ 50
3 Durability After the test, it can be switched on/off normally without abnormality
4 Corrosion resistance The number of corrosion spots shall not exceed 3, and the area of a single corrosion spot shall not be greater than 1mm2
5 Bonding strength of galvanized coating Coating is free of uncovering or shedding
5 Test Methods
5.1 Appearance quality
For appearance requirements, the specimen shall be visually inspected at a distance of 500~700mm under favorable light.
5.2 Physical and chemical properties
5.2.1 Fit force
Inspect according to Annex A.
5.2.2 Tensile strength
Inspect according to Annex B.
5.2.3 Durability
Inspect according to QB/T 5086 and test 1000 times.
5.2.4 Corrosion resistance
Inspect according to QB/T 3826, Test period is 16h and only evaluate fit parts.
5.2.5 Bonding strength of galvanized coating
Inspect according to the scratch method in 2.3, QB/T 3821-1999.
6 Inspection Rules
6.1 Batching
The same type of products which are produced with the same type of raw materials and by the same production process can be regarded as an inspection batch.
6.2 End-of-manufacturing inspection
Each batch of products may not leave the factory until passing the inspection.
6.3 Type inspection
6.3.1 Type inspection shall be carried out under one of the following conditions:
a) Where the product structure, process and materials have significant changes;
b) Where the production is resumed after production halt for over half a year;
c) Where type inspection is required by national quality supervision organization;
d) During normal production, type inspection shall be carried out at least once every half year.
6.4 Sampling quantity
Randomly take 18 products from acceptable products passing end-of-manufacturing inspection, and take three for test of each item based on 6 items, namely appearance quality, fit force, tensile strength, durability, corrosion resistance, bonding strength of coating.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Requirements
5 Test Methods
6 Inspection Rules
Annex A (Normative) Test Method for Fit Force
Annex B (Normative) Test Method for Tensile Strength
ICS 59.140.35
分类号：Y 48
备案号：57118—2017
中华人民共和国轻工行业标准
QB/T 5085—2017
箱包五金配件 磁力扣
Hardware fitting of case and bag—Magnetic buckle
2017—01—09发布 2017—07—01实施
中华人民共和国工业和信息化部 发布
前言
本标准按照GB/T 1.1—2009给出的规则起草。
本标准由中国轻工业联合会提出。
本标准由全国皮革工业标准化技术委员会(SAC/TC 252)归口。
本标准起草单位：东莞市惟思德科技发展有限公司、广州市质量监督检测研究院、中国皮革和制鞋工业研究院、广东省惠州市质量计量监督检测所、国家皮革制品质量监督检验中心(广州)。
本标准主要起草人：孙世彧、章琼阳、陈立坚、黄淑华、陈宗良、步巧巧。
本标准为首次发布。
箱包五金配件 磁力扣
1 范围
本标准规定了磁力扣的术语和定义、要求、试验方法、检验规则。
本标准适用于各种箱包用磁力扣。
2规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅所注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
QB/T 2002.1 Technical Specification for Electroplated Layer on Leather Hardware Accessory
QB/T 3821-1999 Adhesion testing method of the metal deposits for the light industrial products
QB/T 3826 Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Neutral salt spraying test (NSS)
QB/T 5086 Magnetic buckle. Test method for resistance to fatigue
3术语和定义
QB/T 2002.1的术语和定义适用于本文件。
3.1
磁力扣magnetic buckle
通过磁力吸合的金属扣类产品。
3.2
扣合部件fit parts
磁力扣装配后视觉可见的部件，分为上部件和下部件，如图1所示。
上部件
下部件
图1 扣合部件示意图
4要求
4.1 外观质量
4.1.1 产品表面平滑，不应有明显的凹痕、划痕、污渍，边缘规整，色泽均匀。
4.1.2镀层表面不应有明显的针孔、变色、麻点，无剥离、烧焦、起皮、起泡、漏镀及严重的机械损伤。
4.1.3图案、文字清晰。
4.1.4扣合平服，周正。
4.2理化性能
应符合表1的规定。
表1理化性能
序 号 项 目 要求
1 扣合力/N ≥ 8
2 抗拉强力/N ≥ 50
3 耐用性 试验后能正常开关，无异常
4 耐腐蚀性 腐蚀点个数不超过3个，且单个腐蚀点面积不大于1 mm2
5 电镀层结合强度 镀层不揭起或脱落
5试验方法
5.1 外观质量
外观要求均在光线良好的情况下，距试样500 mm～700 mm处目测进行检验。
5.2理化性能
5.2.1 扣合力
按附录A进行检验。
5.2.2抗拉强力
按附录B进行检验。
5.2.3耐用性
按QB/T 5086进行检验，测试1 000次。
5.2.4耐腐蚀性
按QB/T 3826进行检验，试验周期为16 h，只评价扣合部件。
5.2.5电镀层结合强度
按QB/T 3821—1999中2.3划痕法进行检验。
6检验规则
6.1 组批
以同品种原料投产，按同一生产工艺生产出来的同一品种、同一规格的产品组成的一个检验批。
6.2 出厂检验
每批产品出厂前应经过检验，经检验合格后方可出厂。
6.3型式检验
6.3.1 有下列情况之一时，应进行型式检验：
a)产品结构、工艺、材料有重大改变时；
b)产品停产半年以上恢复生产时；
c)国家质量监督机构提出进行型式检验时；
d)正常生产时，每半年至少进行1次型式检验。
6.4抽样数量
从出厂检验合格产品中随机抽取18个进行检验，按外观质量、扣合力、抗拉强力、耐用性、耐腐蚀性、镀层结合强度6项分别各取3个进行测试。
6.5合格判定
6.5.1 单个判定规则
单项3个试样测试，有1个及以上不合格，则判该项不合格。若产品出现影响产品使用功能的缺陷，即可判该产品不合格。
6.5.2批量判定规则
外观质量、扣合力、抗拉强力、耐用性、耐腐蚀性、镀层结合强度全部合格，则判该批产品合格。若有1项(及以上)不合格，则加倍抽样对不合格项进行复验，复验全部合格，则判该批产品合格。若有1项(及以上)不合格，则判该批产品不合格。
附录A
(规范性附录)
扣合力试验方法
A.1 试样制备
将磁力扣的上下部件按正常使用方式分别固定在拉力机的夹具上。
A.2检验器具
拉力机，负荷至少100 N，准确度±0.5 N。
A.3检验方法
A.3.1 沿测试部件的主轴(即与扣合面垂直的方向)均匀施加拉力，记录拉开时的最大力值，记为扣合力。
A.3.2重复A.3.1测试5次扣合力，以5次结果的算术平均值为最终结果，单位为牛顿(N)。
A.3.3重复A.3.2测试其他试样。
A.3.4 以3个试样扣合力的最小值表示。
附录B
(规范性附录)
抗拉强力试验方法
B.1 试样制备
将磁力扣的上下部件按正常使用方式分别固定在织物或皮革等承载物上。
B.2检验器具
B.2.1 拉力机，负荷至少100 N，准确度±0.5 N。
B.2.2三爪拉力夹具或相适应的夹具，夹具的使用不应影响磁力扣和织物或皮革承载物之间的完整结构。
B.2.3秒表(计时器)。
B.3检验方法
B.3.1 在5 s内，沿测试部件的主轴(即与扣合面垂直方向)，均匀施加(50±2)N的拉力，并保持10 s后卸荷，检查被测部件是否拉脱或损坏。磁力扣的上部件和下部件均需测试。
B.3.2重复B.3.1，测试其他试样。
B.3.3 以3个试样抗拉强力的最小结果表示。
