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3C hardware shaft basic structure and parameters

3C hardware shaft basic structure and parameters

 

The basic structure of the shaft part (English name HINGE)
1. Shaft component
a. Sheet metal: stamped die
b. Connecting shaft: automatic lathe completion
c. Standard parts: standard gaskets, nuts, etc.

 

 

 

                  

 

d. Others (such as powder metallurgy, magnesium alloys, plastics, springs, etc.)

      

2 shaft form
a single axis b. double axis c. three axes d. multiple axes
3. Application range of the shaft
NOTEBOOK mobile phone DV DVD digital camera fax machine scanner printer LCD and other electronic equipment .
4. Structural classification of the shaft
a. laminated type: can be divided into single-stage torsion type and double-section convex-concave type

     

 

5. General function parameters of the shaft
a. Lifetime: The laminated life is 10,000-15000 times, the attenuation is 25%, which can meet the customer's use for about three years; the general life of the wrap is 5000-8000 times, the attenuation is 25%; the concave cam type is 50,000-80000 times. , attenuated by 40%.
b. Angle limit function;
c. Torque size and disconnection requirements
   6. Relevant test requirements
 a. Landing test (3 meters height naturally falls without any bad conditions)
b. Storage temperature test (after -20 ° C and 70 ° C, placed for 96 hours, no bad changes and meet the basic performance of the pivot)
c. Torque long-term change performance: The torque value is attenuated by 7%. (Place a one-week test per week
d. Lubricating grease Use special grease for HINGE special grease.
e. Salt spray test 4-8 hours
 f. Resistance test
 g. Destroy the test package type package with a maximum outer diameter × 1.15 rod gauge, the package should not be cracked; the riveting part rotates around the riveting shaft with the maximum torque of the finished product × 2.5, the shaft and the fixed frame cannot appear Loosening or loosening will fix the shaft with the same force along the reverse direction of the shaft. The riveting will not appear loose; the bent part will fix the end of the bend, and the other end of the bend along the reverse side of the bend (Maximum force arm), the force to break the bend is greater than or equal to the maximum torque of the finished product × 2.5; the limit structure is rotated by the torque of 2.5 times, if it is less than 2.5 times the torque Regarded as NG.
  h. Pressure test
2. Common materials for rotating shaft
Sheet metal: SPCC SECC SPHC SK5 SK7 S60C SUS303 SUS304 SUS430
Shaft class: SUM22/23 1015 1006 1008
Other categories: Powder metallurgy Zinc alloy 45# steel Cr12 D2 A3 steel
3. Existing equipment of the company
  Hardware course

  3.模房冲压

       

 

 

 

2. Assembly class

 

 

4. Quality assurance testing equipment

Use and conversion of four torque meters
     1. Classification of torque instruments:
      A. Torque meter

    

a. Static Friction (PEAK) The frictional force of an object at rest, the static friction must be greater than (or close to) the dynamic friction. "Static friction" is generally the torque value measured when the shaft is rotated by the left and right half circles (180° or more).
b. Dynamic friction (TRACK) The friction force of an object as it moves

 

 

2. Unit

扭力换算单位

單位數值

SI 單位

重力單位

英制單位

Nm

Ncm

gf．cm

kgf．cm

kgf．m

ozf．in

1bf．in

1bf．ft

1Nm

 

100

10200

10.19

0.1019

142

8.852

0.7375

1gf·cm1

0.0000981

0.00981

 

0.001

0.00001

0.0139

0.00868

0.0000723

kgf．cm

0.0981

9.81

1000

 

0.01

13.9

0.868

0.072

1kgf．m

9.8066

981

100000

100

 

1390

86.8

7.233

11bf．in

0.113

11.3

1150

1.152

0.0115

16

 

0.083

11bf．ft

1.355

136

13800

13.83

0.138

192

12

 

1ozf．in

0.00706

0.706

72

0.072

0.00072

 

0.0625

0.00521

 

Dongguan Jinfeng Electronics Co., Ltd. is a professional manufacturer of rotary display hinged notebook computer hinge hardware hinges. Customers include major mobile phone accessories wholesalers, electronics factories, electrical appliances factories, plastic factories, notebook computer manufacturers, hardware factories, lighting factories. Wait. Mobile: 137 2449 6370; Wangpu https://sjkpf88.1688.com official website http://www.ejf.com.cn/

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