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Method for producing timepiece spring, device for producing timepiece spring, timepiece spring, and timepiece

A manufacturing method and technology for timepieces, which are applied in the manufacture of watch springs and manufacturing devices, watch springs and watch fields, can solve the problems of reduced bending fatigue characteristics, easy entry into pinholes, difficult hardness, etc., and achieve improved bending fatigue characteristics, Eliminates the reduction of bending fatigue characteristics and the effect of reducing pinholes

Active Publication Date: 2014-03-26
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, amorphous metal has high strength, and its Vickers hardness is about HV800, which makes it difficult to machine at room temperature.
Therefore, there is a problem that it is difficult to machine a plate made of amorphous metal
[0009] In addition, when an amorphous metal watch spring is manufactured by casting as described above, it may solidify with air remaining on the surface or inside, so it is easy to enter the pinhole.
In addition, in the production based on the single-roll liquid quenching method, the surface roughness is also large
[0010] In addition, in the case of applications where a strong bending stress is applied, such as springs, there is a problem that the bending fatigue characteristics are reduced due to the size of pinholes or surface roughness, etc.
[0011] In addition, among amorphous metals, metallic glasses in which the glass transition point is clearly observed have been developed, and the use of metallic glasses as spring materials is being studied. However, metallic glasses also have the same problems as the above-mentioned amorphous metals.

Method used

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  • Method for producing timepiece spring, device for producing timepiece spring, timepiece spring, and timepiece
  • Method for producing timepiece spring, device for producing timepiece spring, timepiece spring, and timepiece
  • Method for producing timepiece spring, device for producing timepiece spring, timepiece spring, and timepiece

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Effect test

no. 1 approach

[0074] Next, a first embodiment of the present invention will be described with reference to the drawings.

[0075] The first embodiment relates to the use of the timepiece spring of the present invention as a drive mechanism for a mainspring. figure 1 It is a plan view showing a drive mechanism 1A of an electronically controlled mechanical timepiece 1 using a spring made of a metallic glass plate according to the first embodiment of the present invention. figure 2 yes figure 1 Cross-sectional view of the drive mechanism 1A. image 3 yes figure 1 Another cross-sectional view of the drive mechanism 1A.

[0076] The drive mechanism 1A of the electronically controlled mechanical timepiece 1 has a barrel 30 composed of a metallic glass spring 31 , a barrel gear 32 , a barrel shaft 33 , and a barrel cover 34 .

[0077] The outer end of metallic glass spring 31 is fixed on the barrel gear 32 , and the inner end is fixed on the barrel shaft 33 . The barrel shaft 33 is supported...

no. 2 approach

[0141] In the above-mentioned first embodiment, as the metallic glass blank 100 of the sheet material 106 for manufacturing the metallic glass spring 31, the sheet material 101 produced by the single-roll liquid quenching method was used, but in this embodiment, the A thread-like material produced by spinning in a liquid. Next, the spinning in-liquid spinning method will be described.

[0142] [Spinning method in spinning solution]

[0143] Figure 10 It is a schematic diagram showing the configuration of the submerged spinning device 120 used in the production of the thread-shaped material 131 .

[0144] Figure 10 The spinning device 120 shown in the rotating liquid has: a rotatable cylindrical body 121; a quartz tube 122 having a nozzle 122a at the lower end and capable of accommodating a metallic glass raw material 122b inside; Frequency heating coil 123.

[0145] In addition, on both surfaces of the cylindrical body 121 , non-illustrated outflow prevention plates for...

no. 3 approach

[0165] Figure 12 It is a schematic diagram showing the rolling process of the manufacturing method of providing the convex part 144a and the concave part 145a in the pair of roll 144,145 in 3rd Embodiment.

[0166] In the above-mentioned first embodiment, a pair of rolls 104 and 105 with flat outer peripheral surfaces were used for the description, but in the present embodiment, the metal glass material in a superplastic state is sandwiched between the protrusions and the recesses during rolling. .

[0167] Such as Figure 12As shown, a convex portion 144a is provided at a predetermined position on the outer peripheral surface of one roll 144 of a pair of rolls 144 and 145 serving as a rolling unit 143 used in rolling processing. Further, a concave portion 145 a to be fitted into the convex portion 144 a is provided at a position facing the convex portion 144 a on the outer peripheral surface of the other roller 145 .

[0168] During the rolling, the metallic glass blank 1...

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Abstract

The invention provides a method for producing timepiece springs, a device for producing timepiece springs, the timepiece spring, and a timepiece. The method for producing the timepiece spring is characterized in that the method for producing the timepiece spring includes a step for producing, by casting, a metallic glass raw material constituted of a metallic glass; a step for heating the metallic glass raw material to achieve a superplastic state; and a step for rolling the metallic glass raw material in a superplastic state to produce a sheet material. A timepiece spring is characterized by being obtained by the method for producing a timepiece spring.

Description

technical field [0001] The present invention relates to a method for manufacturing a spring for a watch, a device for manufacturing a spring for a watch, a spring for a watch, and a watch. Background technique [0002] Clock springs are used for springs that constitute the power source of driving mechanisms such as clocks, hairsprings that bias the balances that constitute governors, and springs that fix quartz oscillators in quartz oscillator timepieces in the biased state. Conventionally, carbon steel, stainless steel, cobalt alloys, copper alloys, and the like have been used as spring materials for the above applications. [0003] On the other hand, in order to achieve high precision and stable operation of precision machinery such as watches, amorphous metals have been considered as spring materials (see Patent Documents 1 and 2). [0004] The above-mentioned amorphous metal watch spring can be produced by a casting method such as a single-roll liquid quenching method. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B1/14G04B17/06
CPCG04B1/145Y10T29/49579Y10T29/53G04D3/0076G04B1/10
Inventor 土屋和博竹内政生茂木正俊长尾昭一
Owner SEIKO EPSON CORP
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