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spring

China BQUQ company is a professional engaged in numerical control processing services, precision processing of metal stamping parts, metal stamping parts, precision springs, electronic springs, aluminum radiators, aluminum radiators professional suppliers, official website: bquq.com


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Product details

1. Precision spring, the force value is constant

Your product design life is three years, the spring should work steadily for three years. No premature aging, no weakness, and no end point customers will ask you.

Force tolerance ≤ ±5%

Million fatigue life verifiable

4-Hour spring plan

2. The pit of the spring, you know best

A spring worth a few dollars fails, and it can shut down tens of thousands of yuan of equipment. You must have seen it: the sample has perfect elasticity, and the mass production batch is large and small; everything is normal during assembly, and the elasticity attenuates by more than 30% after three months of use; the drawings require tens of thousands of lifetimes, but it actually breaks after thousands of times. At Armored Cattle, we changed the spring from "wearing part" to "trust part".

3. Why give the spring to BQUQ?

Advantage 1: The force value is precisely controlled, so that each spring "has the same force"

Our approach: introduce numerical control multi-axis spring machine, online monitoring of the outer diameter, free length and number of turns during the winding process. The first piece of each batch is digitally displayed by the spring tension and compression testing machine to check the full force value, and the parameters are locked after confirming the process window. During mass production, every 500 pieces are sampled once, and the force value data is archived in real time.

Value to customers: After your product leaves the factory, every button pressed and every switch flipped by the user feels exactly the same. Batch switching does not cause end point complaints.

Advantage 2: Fatigue life is not an estimate, but a verification

Our approach: According to the working stroke and frequency you give, use fatigue theory to calculate the expected life in the design stage. After proofing, take the initiative to go to the fatigue testing machine, run the number of cycles you require, and issue a "Spring Life Verification Report".

Value to customers: You don't have to wait for the product aging test to find the spring premature aging. Get the life data before mass production, the R & D decision is based, and the market will not roll over.

Advantage 3: Materials never compromise, starting from wire to control quality

Our approach: wire warehousing must check: spectral confirmation grade, tensile test to confirm tensile strength and elongation, salt spray test to confirm coating corrosion resistance. We only specify the grade, and do not allow "performance close" substitution.

Value to customers: eliminate elastic mutations caused by differences in wire batches. Your springs, from the first piece to the millionth piece, are genetically uniform in material.

Advantage 4: Surface treatment matching end point environment

Our approach: According to your use environment, provide galvanized, nickel-plated, chrome-plated, dacromet, electrophoresis, stainless steel color and other solutions. Salt spray test from 24 hours to 480 hours can be met on demand.

Value to customers: the spring does not rust, does not break hydrogen embrittlement, and is not rejected by the end point due to surface problems.

Advantage 5: Full coverage from miniature to powerful

Our approach: wire diameter from 0.08mm to 8.0mm, product types cover compression springs, tension springs, torsion springs, shaped wire forming, battery spring sheets. Whether used in micro sensors or heavy machinery, we have corresponding equipment and experience.

Value to customers: One supplier for all spring needs. No need to find one for miniature parts and another for large springs.

Advantage 6: Engineering collaboration to help you optimize spring design

Our approach: After receiving the drawings, the engineering team will not only quote, but also take the initiative to analyze: whether the work stroke exceeds the elastic limit of the material, how to optimize the stress concentration point, and whether the installation space can be further compressed. Give the "Spring Scheme Proposal" within 4 hours.

Value to customers: It is possible to achieve the same elastic function with a smaller size and lower cost. Your design has an extra gatekeeper.

4. Types of springs we serve

Compression spring: rectangular section, unequal pitch, conical spring can be used, force value curve can be customized

Tension spring: a variety of hook forms, precise control of initial tension

Torsion spring: accurate angle of inner and outer legs, stable torque

Shaped wire forming: two-dimensional/three-dimensional forming of clasps, clamping springs, battery reeds, etc

Finger spring: used for high voltage connectors, motor grounding rings, both elastic and conductive

5. Quality commitment: let the spring no longer be a "blind box"

Wire warehousing four inspections: grade, tensile, elongation, salt spray, lack of one will not be warehoused.

The first piece must be inspected: the first piece in each batch, full size + force value + fatigue sampling.

SPC process control: real-time monitoring of key parameters, automatic shutdown alarm for abnormal fluctuations.

The report is accompanied by: each batch of force value sampling report can be traced back to the wire furnace number and equipment number.

Hydrogen embrittlement prevention: Dehydrogenation treatment is carried out within 2 hours after electroplating to eliminate the hidden danger of brittle breakage.

6. Cooperation process: four steps to make the spring no longer a shortcoming in your product

The first step is to send the requirements: provide the spring type, wire diameter, outer diameter, free length, working stroke, and life requirements.

The second step is to receive the plan: receive the "Spring Plan Proposal" and quotation within 4 hours.

The third step is to confirm the proofing: the proofing cycle is [5] days, and the first sample + force value test data + life verification report is submitted.

The fourth step, mass production delivery: schedule production according to nodes, attach sampling reports to each batch, and perform full inspection or sampling inspection according to your requirements.

7. Frequently Asked Questions

Q: What is the range of spring wire diameters you can make?

Answer: The wire diameter from 0.08mm to 8.0mm is covered by corresponding equipment. Both micro electronic springs and heavy mechanical springs can be undertaken.

Q: How much can the force tolerance be controlled?

Answer: Conventional ±8%, precision grade ±5%, ultra-precision grade can challenge ±3%. Visual diameter and spring specifications, send a picture to confirm that the grade can be achieved.

Q: Will you provide a lifespan test report?

Answer: Yes. It is issued on its own initiative during the proofing stage, and can be sampled periodically during mass production. The test conditions are performed according to the work schedule and frequency you specify.

Q: What is the minimum order quantity?

Answer: There is no MOQ limit in the sample stage. Volume output is negotiated according to wire diameter and complexity, and we support flexible scheduling.

Don't let a spring shake the reputation of the entire product

Please click the button below to send us a quote.

parameter

Can be customized for you according to your requirements

List of commonly used materials for precision springs

1. Piano steel wire/high carbon steel wire (SWP-A/SWP-B)

Characteristics: high tensile strength, high elastic limit, good fatigue life.

Limitations: No corrosion resistance, requires surface treatment protection.

Purpose: high stress compression spring, tension spring, spring, precision mechanical spring.

2. Stainless steel wire (SUS304-WPB/SUS316-WPA)

SUS304-WPB: the most common stainless steel spring wire, corrosion resistance, weak magnetic. Use: electronic equipment spring, medical apparatus spring, food equipment spring.

SUS316-WPA: stronger acid and alkali resistance, high temperature resistance. Uses: Semiconductor equipment spring, chemical environment spring, marine equipment spring.

SUS631 (17-7PH): Precipitation hardened stainless steel with high elasticity and strength after heat treatment. Uses: Aviation grade springs, high performance valve springs, sensor elastomers.

3. Alloy spring steel (various fatigue-resistant high-stress scenarios)

50CrVA: chromium vanadium steel, excellent fatigue resistance, temperature resistance. Uses: automotive valve springs, heavy-duty mechanical springs.

60Si2MnA: silicon manganese steel, good stress relaxation. Uses: railway fastener spring, heavy suspension spring.

55CrSi: impact and fatigue resistance. Application: clutch spring, high voltage switch spring.

4. Copper alloy wire (conductive + elastic)

Phosphor copper C5191: good elasticity, good conductivity, fatigue resistance. Uses: electronic contact spring, switch spring, relay spring.

Beryllium Copper C17200: Ultra-high elasticity and conductivity, can be strengthened by heat treatment. Purpose: High-end connector finger spring, sensor elastic element, explosion-proof tool spring.

5. Special alloy wires (in extreme environments)

INCONEL X-750: Nickel-based alloy, resistant to ultra-high temperature and corrosion. Uses: Aircraft engine seal springs, nuclear industry springs.

Hastelloy C-276: strong acid and alkali resistance. Uses: chemical valve spring, deep sea equipment spring.

Titanium alloy spring: extremely light, corrosion resistant, biocompatible. Uses: medical implants, aerospace sensitive components.

List of spring surface treatment solutions

Spring surface treatment, not only to prevent corrosion, but also to avoid hydrogen embrittlement. The following are common solutions:

1. Electroplating (decoration + anti-corrosion)

Galvanized (blue and white zinc/color zinc/black zinc): the most cost-effective. Salt spray can reach 48-120 hours. Uses: general mechanical springs, automotive parts springs.

Nickel plating: good decoration, excellent corrosion resistance. Use: electronic equipment visible spring, battery spring.

Chrome plating: high hardness, wear resistance. Use: high wear environment spring.

2. Dacromet/Chromium-free Dacromet (high corrosion resistance and no hydrogen embrittlement)

Features: No risk of hydrogen embrittlement, salt spray resistance up to 480-1000 hours, high temperature resistance.

Purpose: Automobile key springs, wind power springs, high-speed rail fastener springs. Recommend the preferred alternative to electroplating.

3. Electroless nickel plating (uniform coverage)

Characteristics: uniform coating, full coverage of complex shapes, high hardness.

Purpose: Precision electronic spring, miniature spring with complex shape.

4. Electrophoretic coating

Features: Color optional (black, gray, etc.), uniform coating, good anti-corrosion.

Purpose: Exposed springs with high appearance requirements, visible springs for automobiles.

5. Passivation treatment (for stainless steel springs)

Features: After pickling and passivation, a dense oxide film is formed, and the corrosion resistance is improved several times without changing the size.

Purpose: All stainless steel springs must be treated before leaving the factory.

6. Dehydrogenation treatment (all electroplated springs must be done)

Characteristics: within 2 hours after electroplating, bake at 200 ° C for 4-8 hours to remove hydrogen atoms.

Value: This is the life infra that the spring does not break. All electroplated springs of armored cattle, the dehydrogenation process is a mandatory standard.

7. True color/no treatment

Applicable: Stainless steel spring in a dry and clean environment, or without surface treatment as specified by the customer.

Material selection + surface treatment quick check table (you can directly put the details page)

usage environment
推荐材料推荐表面处理

Ordinary indoor, non-corrosive
琴钢线 SWP-A镀锌蓝白锌

Humid, weak corrosion
不锈钢 SUS304-WPB钝化

Strong acid and alkali, chemicals
不锈钢 SUS316钝化

High salt spray, outdoor
不锈钢 SUS304 或琴钢线达克罗 / 无铬达克罗

Electrical conductivity + elasticity
磷铜 C5191 / 铍铜 C17200镀镍或本色

High temperature environment
INCONEL X-750 / SUS631本色或钝化

High stress + long life
50CrVA / 琴钢线 SWP-B达克罗或电泳

Not sure what material and finish to use for your spring?

Send the working environment (temperature, humidity, chemical contact) + life requirements, and our engineers will provide the "Spring Material and Surface Treatment Proposal" within 4 hours to help you avoid the risk of corrosion, fracture, and force value attenuation from the source.

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