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Spring×鶴岡発條 - List of Manufacturers, Suppliers, Companies and Products

Spring Product List

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Causes and countermeasures for spring breakage and damage.

The clues to identifying the cause of the damage are the lifespan calculations and strength calculations.

The clues for identifying the cause of breakage are lifespan calculations and strength calculations. If a spring breaks below the calculated results, the cause of the breakage is suspected to be "stress concentration" originating from scratches or machining marks. When we examine the springs upon consultation, we often find scratches or machining marks caused during processing. In this case, reworking with attention to these scratches can lead to improvement. If the timing of the breakage aligns with the calculations, the cause of the breakage is thought to be insufficient material strength. The countermeasure for breakage in this case is to change the specifications of the spring. Specifically, this may involve changing the material to one that is more durable or increasing the wire diameter, while considering the balance to avoid altering the spring's force characteristics (spring constant, load). Our company addresses spring-related issues such as breakage and sagging. If you send us broken samples, we will propose countermeasures and, if desired, we can also produce improved prototypes. First-time customers are also welcome to consult with us without hesitation. In fact, most of the customers who consult with us have never done business with us before. We look forward to your inquiries.

  • Contract manufacturing

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Tension Spring SWP-AΦ0.3 U Hook

In the case of small lot production, costs can be reduced by processing by hand.

The shape of this spring's hook is a "U hook." It is a commonly used shape alongside "reverse round hooks" and "round hooks." Although it is a shape that can be formed using a multi-forming machine, the hook part is processed by hand due to small lot production. In the case of small lot production, incorporating handmade elements can help reduce costs, not just for this spring. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Tsuruoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

  • Spring

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Garter spring, close-contact spring, SUS631-WPC Φ0.4

This is a garter spring used for reinforcing the seal part.

It may look like just a ring, but in fact, it is constructed by twisting the ends of a thin spring that is tightly coiled, joining them together to form a complete loop. During the twisting process, care is taken to ensure that no twisting occurs throughout the entire ring. The entire ring can stretch and contract like a rubber band, making it useful as a reinforcing spring for the sealing part. The material used is "spring stainless steel wire, SUS631-WPC." This stainless steel spring material is used when greater strength and heat resistance are required compared to the general-purpose "SUS304-WPB." To achieve the specified strength, a heat treatment known as precipitation hardening (also called aging treatment) is applied after the spring is formed. For springs of the same shape, there are processing achievements using non-magnetic and corrosion-resistant "SUS316-WPA" and iron-based spring materials such as "piano wire" and "hard steel wire." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Tsuruoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

  • Spring

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Wave spring SUS304-WPBΦ0.8 retaining spring

It is used to hold the workpiece in a space-saving manner with a flat wave-shaped spring.

This is a space-saving spring used to secure work in narrow gaps. It is formed flat in a wave shape rather than in a coil shape. The material used is "spring stainless steel wire SUS316-WPA," which has better corrosion resistance than "SUS304-WPB" and is commonly used for springs in food factories and chemical plants. After spring forming, heat treatment (low-temperature annealing) is applied to relieve stress. Springs of the same shape have been processed using "piano wire (SWP-A, SWP-B)," "hard steel wire (SW-C)," and "phosphor bronze wire (C5191W)." If you have any issues with springs, please feel free to consult us. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

  • Contract manufacturing

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Close-fitting spring SUS304-WPBΦ0.5 taper

It is tightly wound in a tapered shape.

Material: Stainless steel wire for springs Wire diameter: Φ0.5 It is a bit difficult to see, but it has a tapered shape from the front to the back. Since the inner diameter side is used as a guide, it has been finished without burrs or sharp edges. If you have any issues with springs, please feel free to consult us. Tsuruoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

  • Contract manufacturing

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Spring load: static load and dynamic load

The loads applied to a spring can be broadly divided into two types: static loads and dynamic loads.

◎ Static Load The following cases apply: 1) During the use of the spring, there is no fluctuation in load (a constant load is applied). 2) There is fluctuation in load, but the number of repetitions is approximately 1,000 times or less over its lifetime. ◎ Dynamic Load Also referred to as repeated load, most springs fall into this category. The methods for evaluating the durability of springs also differ for each case. In the case of static load, the evaluation criterion is whether the material undergoes plastic deformation. The idea is that it is acceptable as long as there is no "settling" in the spring. For dynamic load, it is natural that there is no settling, and the evaluation is based on how many cycles the spring can endure before fatigue failure occurs. By the way, enduring 10 million cycles is considered equivalent to having a semi-permanent durability. The "fatigue" of metals refers to the progression of micro-cracks due to repeated loading. Typically, it does not involve plastic deformation, making it a very troublesome phenomenon that can lead to sudden failure without any prior signs of settling or deformation. This concludes a rough explanation of static and dynamic loads and their evaluation methods. If you have any points that were insufficiently explained or any questions, please feel free to contact us by phone or email.

  • Contract manufacturing

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Twisted spring, phosphor bronze wire, C5191, Φ1.4

Bronze wire develops "springiness" through heat treatment.

Material: Phosphor bronze wire, C5191W Wire diameter: Φ1.4 Springs are sometimes required to have properties such as non-magnetism, electrical conductivity, and corrosion resistance. It is often difficult to satisfy these properties with iron-based or stainless steel spring materials, so copper alloys are chosen. The most commonly used material for coil springs is "phosphor bronze wire." Phosphor bronze wire exhibits "springiness" only after heat treatment, so it must undergo heat treatment after forming. The heat treatment temperature is around 250 degrees and is referred to as low-temperature annealing. (For more information on phosphor bronze wire, please refer to the related links.) If you have any concerns regarding springs, please feel free to contact us. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

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Non-uniform pitch spring, nonlinear characteristic spring

To obtain a nonlinear spring constant, a coil spring with uneven pitch is effective.

To obtain a nonlinear spring constant, a coil spring with an uneven pitch, like the one in the photo, is effective. When deflection is applied to this spring, the narrower pitch section on the right side first makes contact. As a result, the apparent effective number of coils in the entire spring decreases, increasing the spring constant and significantly raising the load. The spring constant takes on a shape similar to a broken line graph. Springs with a nonlinear spring constant include not only uneven pitch springs but also conical springs. The spring constant of these springs gradually increases with increasing deflection, resulting in a curved shape. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruoka Spring Co., Ltd. We also support web conferencing.

  • Spring

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Counting the number of turns in a spring

Care is needed in counting the number of turns of a spring.

I will count the number of coils in the photo of the compression spring. The number of lines = the number of circles = 5, therefore the number of coils = 5, but it is important to note that this is not the case. In the case of springs, one complete turn is counted as one coil. If you start counting from the left end, it will be one coil at the red circle. The star-marked area is still less than one coil, approximately 0.5 coils. The number of coils in this spring = 4 coils. By the way, the one coil at both ends is in contact with the adjacent coil and is called a "seat coil." The role of the seat coil is to improve stability when standing, and the seat coil itself does not function as a spring. The number of coils excluding the seat coils, which effectively work as a spring, is called the effective number of coils. This spring has an effective number of coils = 2 coils, total number of coils = 4 coils. If you have any questions or concerns about springs, please feel free to consult us. Our technical staff will respond carefully. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruoka Spring Co., Ltd. We also support web conferences.

  • Spring

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