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

Coil spring Product List

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Causes and Measures of Spring Deformation and Sagging

Causes and Measures of Spring Deformation and Sagging

By changing the specifications of the spring, it is possible to prevent sagging.

We have received inquiries about the issue of 'the spring's force weakening during use.' This is caused by 'sagging.' 'Sagging' is a phenomenon where the material undergoes plastic deformation during the use of the spring, resulting in a change in the dimensions of the spring, which is due to insufficient material strength. Whether the material's strength is adequate can be calculated based on the spring's usage conditions. Countermeasures for 'sagging' involve changing the material to one with higher durability, increasing the wire diameter, and other specification changes. In doing so, we select specifications to ensure that the spring's force (spring constant and load) does not change; however, if there are restrictions on the space where the spring fits, we will proceed in consultation with the customer. If there are no issues with the material strength calculations, potential causes of 'sagging' may include: 1) improper heat treatment after spring forming, or 2) use in environments exceeding the heat resistance temperature. Our company addresses issues related to sagging, deformation, and other spring troubles. If you send us samples, we will verify the strength and durability and propose improvement measures. Our technical staff will respond carefully, so please feel free to consult with us.

  • Spring

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Compression spring SUS304-WPB Φ0.35 spring index

Compression spring SUS304-WPB Φ0.35 spring index

The "spring index," also known as D/d (debaide), is a value that serves as a guideline for the difficulty of processing.

The material used is "spring stainless steel wire SUS304-WPB." The wire with a diameter of Φ0.35 is wound into a coil with an average diameter of Φ11mm. The spring index is approximately 31, indicating that it is a spring with a high difficulty level for coiling processing. The spring index is the value obtained by dividing the average coil diameter by the wire diameter, serving as a guideline for the difficulty of processing the spring. It is also referred to as the spring index = D/d (Devi-D). According to JIS standards, a spring index between 4 and 22 is desirable. If the spring index is 4 or lower, the coil diameter is small and tight, making it difficult to wind; if the spring index exceeds 22, the coil diameter is large and fluffy, making it difficult to wind, which gives you that impression. This spring has a spring index exceeding 22, at 31, but how does it look? It seems to be wound quite neatly. 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 Tsuruga Spring Co., Ltd. for springs. We also support web conferences.

  • Spring

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Spring design - Prototyping, short delivery time

Spring design - Prototyping, short delivery time

If you provide us with the general design requirements, we will design and prototype within a short timeframe.

The twisted spring in the photo was designed and prototyped by our company. We proceeded with the design based on the following specifications you provided: 1) Coil inner diameter, 2) Load at installation to maximum angle, 3) Durability (1 million cycles) The designed spring can be prototyped in a short lead time. The spring in the photo was delivered about one week after the order was placed. We can manufacture from a quantity of one. Our company accepts the manufacturing, design, and prototyping of various springs. If you provide us with rough design conditions, we will propose the optimal specifications and produce a prototype. We understand that some may be unsure about how to specify the design conditions for the spring. Our technical staff will respond carefully, so please feel free to consult with us. Tsuruga Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

  • Spring

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Compression spring bolt screwing spring fixation

Compression spring bolt screwing spring fixation

The spring is used by screwing it into an M10 bolt.

Material: Piano wire type A, SWP-A Wire diameter: Φ1.5 The terminal on the right side of the spring is a tightly wound 5-turn coil. The inner diameter is managed to allow for smooth screwing of an M10 bolt. The method of screwing a bolt into a tightly wound coil is sometimes used for fixing springs. By changing the wire diameter and coil inner diameter, the feel when screwing (such as smoothly like assembling a nut, or a bit tighter while applying some resistance) can be freely controlled. We will create a prototype based on your request for your evaluation. The terminal on the left side is an open-end with a pitched coil. Our company handles the manufacturing, design, and prototyping of springs. Our technical staff will respond carefully, so please feel free to consult us if you have any concerns. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

  • Spring

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Spring arm SUS304-WPB Φ0.5 crushed processing

Spring arm SUS304-WPB Φ0.5 crushed processing

The crushed processing part functions as a retention for the resin coating.

The material is "spring stainless steel wire - SUS304-WPB," with a wire diameter of Φ0.5. After bending processing with a multi-forming machine, the tip is flattened (indicated by the yellow arrow). The flattening process is finished by hand using a dedicated jig. The flattened part functions as a retention stop during the subsequent resin coating process. Our company offers wire forming and bending processing services. Please feel free to consult us if you have any concerns. Our technical staff will respond carefully. Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Technical contact: Ujiie Tsuruoka Spring Co., Ltd. We also support web conferencing.

  • Contract manufacturing

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Deformation and sagging of springs: Causes and countermeasures.

Deformation and sagging of springs: Causes and countermeasures.

Introducing the causes and countermeasures for deformation and wear of springs in spring troubles!

"Settle" refers to the phenomenon where the material of a spring undergoes plastic deformation during use, resulting in a change in the dimensions of the spring, primarily caused by insufficient material strength. The adequacy of the material's strength can be calculated based on the spring's usage conditions. Countermeasures for "settle" involve changing the material to one with higher durability, increasing the wire diameter, and other specification modifications. In doing so, care is taken to select specifications that do not alter the spring's force characteristics (spring constant or load), but if there are space constraints for the spring, discussions with the customer will be necessary. If there are no issues with the strength calculations, potential causes of "settle" may include: 1) improper heat treatment after spring formation, or 2) use in an environment exceeding the heat resistance temperature. Our company addresses spring-related troubles. If you send us the deformed item, we will verify its strength and durability and propose improvement measures. Our technical staff will respond carefully, so please feel free to consult us. Tsurugaoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 Email: web@tohj.com We also support web meetings.

  • Spring

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Causes and countermeasures for spring breakage and damage.

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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Spring load: static load and dynamic load

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

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

  • Spring

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Counting the number of turns in a spring

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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