This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of watch hairsprings (referred to as "hairsprings"). This standard applies to mechanical watch hairsprings. QB/T 2403-1998 Watch hairsprings QB/T2403-1998 Standard download decompression password: www.bzxz.net

QB/T2403--1998
This standard is revised and adjusted to the industry standard based on the original national standard GB4037-1983 "Watch Hairspring". During the revision process, some technical elements of the standard were adjusted and modified. The main differences between this standard and the original GB4037-1983 are: the thickness dimension series of the hairspring is specified, the limit deviation of the inner pile and the outer pile is increased; the factory inspection and type inspection are increased.
This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Center for Clock and Watch Standardization. The drafting unit of this standard: Xi'an Clock and Watch Component Factory. The main drafters of this standard: Wu Xinjian, Huang Lijuan, Sun Yufeng. From the date of implementation of this standard, the original national standard GB4037-1983 "Watch Hairspring" will cease to apply. 464
1Scope
Light Industry Standard of the People's Republic of China
Watch Hairspring
QB/T 2403 -- 1998
This standard specifies the product classification technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of watch hairsprings (referred to as "hairssprings").
This standard is applicable to watch hairsprings.
2Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 2828-—1987i
Batch inspection counting sampling procedure and sampling table (applicable to the inspection of continuous batches) Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of the stability of the production process) GB/T2829-—1987
QB/T1249—1991
Ordinary mechanical watches
3 Product classification
The hairspring is divided into 1, I, and straight categories according to the watch classification method specified in 3.1 of QB/T1249~—1991. Its specifications, dimensions and deviations are as follows. 3.1 Thickness
The thickness and pitch deviation of the hairspring are shown in Table 1.
The thickness of the hairspring
3.2 Inner pile
The dimensions and accuracy of the inner pile of the hairspring are shown in Table 2.
3.3 Outer pile
The dimensions and accuracy of the outer pile of the hairspring are shown in Table 3.
Approved by the State Bureau of Light Industry on November 25, 1998
Pitch deviation
HiKAoNiKAca
Thickness of hairspring
Pitch deviation
Implemented on June 1, 1999
Inner pile hole diameter
Outer pile outer diameter
4 Technical requirements
4.1 Dimension accuracy
Limit deviation
The inner pile of a circle is +0.010
The inner pile of a triangle is +0.006
Limit deviation
4.1.1 The pitch deviation of the hairspring shall comply with the provisions of Table 1. QB/T 2403-1998
Inner pile height
Limit deviation
Outer pile length
4.1.2 The dimensional accuracy of the inner pile of the hairspring shall comply with the provisions of Table 2. 4.1.3 The dimensional accuracy of the outer pile of the hairspring shall comply with the provisions of Table 3. 4.2 Physical properties
The physical properties of the hairspring shall comply with the provisions of Table 4. Table 4
Temperature coefficient, s/℃d
Antimagnetic properties, s/d
4.3 Fixed length
4.3.1 The fixed length requirements of the hairspring shall comply with the provisions of Table 5. Item
Limit deviation of hairspring outer diameter, mm
Angle between inner and outer ends, (°)
Parameters after fixed length are determined according to Figure 1.
Inner end of triangular inner pile hairspring
Lead-out radius R
Limit deviation
4.4 Assembly quality
QB/T 2403--1998
DOuter diameter of hairspring after a certain length: d-Inner diameter of hairspringF-Wound angle of hairspring after fixed length*-Pitch of hairspring,-Roundness of hairspring (,-EB-d-
4)02-Hairspring burst error (8Amx-Amin)4)*+(OE-OB-
-Coaxiality of hairspring to inner pile =.
FN(OE-OA-
F-Corresponding point of hairspring Nth circumference and inner end starting point Figure 1
4.4.1 Between the hairspring plane and the inner pile plane, no There is obvious deflection. The coaxiality and roundness of the hairspring shall comply with the requirements of Table 6. 4.4.2
Coaxiality
Roundness of inner frame
Round inner pile
Triangular inner pile
4.4.3 The fastness of the hairspring shall be based on the fact that the hairspring and the inner pile do not fall off after the hairspring is hung with a weight of 50g. Round inner pile
4.5 Appearance quality
4.5.1 The surface of the hairspring shall be smooth and bright, and no obvious defects such as dirt, flowery hair, and mechanical damage are allowed. 4.5.2 The hairspring shall not have obvious wavy or tower shapes. HTKAoNni KAca-
Triangular inner pile
5 Test method
5.1 Dimensional accuracy
QB/T 2403 - 1998
5.1.1 The hairspring pitch deviation shall be measured with a 50× projector, and the result shall comply with the provisions of 4.1.1. 5.1.2 The inner pile diameter of the hairspring shall be measured with a plug gauge or a 50× projector (the inner pile diameter is based on the non-cut surface of the inner pile), and the inner pile height shall be measured with a 50× projector, and the result shall comply with the provisions of 4.1.2. 5.1.3 The outer diameter of the outer pile of the hairspring shall be measured with a dry ruler, and the length of the outer pile shall be measured with a 50× projector, and the result shall comply with the provisions of 4.1.3. 5.2 Physical properties
The hairspring temperature coefficient and anti-magnetic performance tests shall be carried out in accordance with the corresponding provisions of mechanical watches in QB/T1249, and the results shall comply with the provisions of 4.2.
5.3 Fixed length
After the hairspring is fixed in length on the fixed length instrument with a standard balance wheel, the outer diameter size and the inner and outer end clamps The angle is inspected with a 50× projector or a 30× tool microscope, and the result shall comply with the provisions of 4.3.
5.4 Assembly quality
5.4.1 The plane of the hairspring and the plane of the inner pile are inspected with a (3~5)× magnifying glass or a (15~20)X microscope, and the result shall comply with the provisions of 4.4.1.
5.4.2 The roundness and coaxiality of the inner frame are measured with a 50× projector, and the result shall comply with the provisions of 4.4.2. 5.4.3 Hairspring fastness Use a special fixture to add a weight to the inner end of the hairspring, make it perpendicular to the plane of the inner pile, and lift the outer end upward until the weight is suspended in the air, and the result shall comply with the provisions of 4.4.3.
5.5 Appearance quality
Under an 8W fluorescent lamp, use a (3~5)× magnifying glass to inspect, and the result shall comply with the provisions of 4.5. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with GB/T2828, using a single sampling plan. The unqualified categories, inspection items, inspection level (II.), and qualified quality level (AQL) are shown in Table 7.
Unqualified categories
Inspection items
Pitch deviation
Inner pile hole diameter
Temperature coefficient
Antimagnetic properties
Inner and outer end angle
Coaxiality
Inner frame roundness
Sexspring fastness
Sexspring outer diameter
Appearance quality
Corresponding clauses
4.1.1 ,5.1.1
4.1.2,5.1.2
4.3.1,5.3
4.4.2,5.4.2
4.4.2,5.4.2
4.4.3.5.4.3
4.3.1,5.3
Inspection level
6.1.2 The composition of the batch and the size of the batch shall be agreed upon by the supply and demand parties. 6.1.3 The implementation of the inspection, the determination of conformity and the disposal after the inspection shall be carried out in accordance with the relevant provisions of GB/T2828. 6.2 Type inspection
Qualified quality level
QB/T 2403 -- 1998
6.2.1 Type inspection shall be carried out in accordance with GB/T2829, using a single sampling plan. The unqualified categories, inspection items, discrimination levels (DL), unqualified quality levels (RQL), sample numbers and discrimination arrays are shown in Table 8. Table 8
Non-qualification categoryWww.bzxZ.net
Inspection items
Pitch deviation
Inner pile hole diameter
Temperature coefficient
Anti-magnetic properties
Inner and outer end angle
Coaxiality
Inner frame roundness
Gossamer fastness
Gossamer outer diameter
Inner pile height
Outer pile outer diameter
Outer pile length
Appearance quality
Corresponding clauses
4.1.1, 5.1.1
4.1.2.5.1, 2
4,3.1.5. 3
4.4.2,5.4.2
4.4.2,5.4.2
4.4.3,5.4.3
4.3.1.5.3
4.1.2.5.1.2
4.1.3.5.1.3
Discrimination level
Unqualified quality level
Number of samples
Samples for type inspection shall be randomly selected from a batch or batches that have passed the export inspection, and the spare samples shall be determined by the inspection unit. The implementation of the inspection, the determination of qualification and the post-inspection disposal shall be carried out in accordance with the relevant provisions of GB/T2829. 6.2.3
The cycle of type inspection is generally once a year, but type inspection shall be carried out in any of the following circumstances. 6.2.4
a) When a new product is put into production or an old product is changed; b) When there are major changes in the design, structure, process and materials of the product; c) When the product is resumed after a long period of suspension; d) When the national quality supervision agency proposes a requirement for type inspection. 7 Marking, packaging, transportation and storage
7.1 Marking
Each packaging box should have a product qualification seal and indicate: a) Manufacturer's name and address;
b) Specifications:
c) Trademark;
d) Implementation standard number;
e) Batch number and quantity;
f) Inspector's seal:
g) Date of manufacture.
7.2 Packaging
The hairspring and stud are packed in aluminum foil and paper box respectively. 7.3 Transportation and storage
During transportation and storage, the product should be kept in a dry environment and extrusion and collision are strictly prohibited.
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