Design points of non-standard chains
The structural dimensions of non-standard chains should be designed in accordance with the provisions of Table 1, Table 2, etc. in GB/T 6074-2006. During the design processBy reasonably determining the dimensions of the chain plate and pin shaft, selecting suitable materials, and heat treatment hardness, the minimum tensile strength of the chain specified in the standard can be metImportant technical indicators such as strength, chain length accuracy, etc. are required. It should be noted that non-standard chains are in contact with the groove wheel on the outer edge of the chain plateRelatively speaking, the quality requirements for the outer edge of the plate type chain plate are higher than those for the outer edge of the ordinary precision roller chain plate. For example, the outer edge of the plate type chain plateThe bright strip of the punching section should be large and the collapse angle should be small. This requirement should be taken into account during design and manufacturing. In addition, GB/T 6074-2006 has not yet addressed the plate typeRegulations have been made for fatigue performance testing of chains. However, an increasing number of forklift, automotive lifting, and other host companies have developed OEM plate chains that are compatible with themThe product has put forward high fatigue strength requirements, and some even stipulate that the number of cycles for plate chain testing should reach 5 × 10⁶～1.0×10⁷So when designing this OEM plate chain product, we also need to pay close attention to the performance indicators related to product safety.

Due to the fact that non-standard chains are usually not circular when applied, the pulling force borne by the chain during operation is transmitted through the connecting ring or through the pin shaftOther attachments are loaded onto both ends of the chain, so the design of the connecting ring is also important. GB/T 6074-2006 specifies the "outer connecting ring”The requirements for the two types of connecting ring components, namely "inner connecting ring" and "inner connecting ring" (see Figure 2, Figure 3, Table 3, Table 4 in the original standard text for details). We design the connecting ringThe structural dimensions of the end where the connecting ring is connected to the plate chain should meet the requirements of the standard. The structural dimensions of the other end of the connecting ring must meet the requirements of the machineThe installation requirements usually use fine thread screws and nuts with good self-locking performance. Connecting rings and those used to fix plate chainsThe pin should have at least the same minimum tensile strength and minimum shear strength as the chain.

Focus on the design of non-standard chain specific plate chains
The basic structural dimensions of non-standard chain specific plate chains cannot be calculated according to GB/T 6074-2006. However, we design and manufacture stacksSpecial attention should be paid to the technical specifications of the specialized plate chain for high-speed machines, which must be much higher than the characteristics of ordinary standard plate chains. The key points that need to be achieved are usuallyYes: Chain plates should be made of high-quality structural steel that is better than standard plate chains. The outer edge shape of the chain plate should be designed with a wide waist. Suitable heat treatment hardness andThe extrusion process of the chain plate after heat treatment ensures that the non-standard chain has high fatigue strength, and the pin shaft is made of high-quality alloy steel with better performance than the standard plate chain,The surface of the pin shaft adopts a deep hardening layer heat treatment process to improve surface hardness and increase wear resistance; The size of the chain plate and pin shaft depends on the chainStrip failure mode, adopting optimized design to ensure uniform force distribution of chain plates, pin shafts, etc.: to minimize the use of chainsThe occurrence of the phenomenon of the chain falling apart due to the detachment of the outer chain plate from the pin shaft. The reliable riveting method of using square or round rivets at both ends of the pin shaft should be adopted: after riveting the chain, a higher force should be appliedPre tension load is used for pre tension, which is different from the provisions of GB/T 6074-2006. The minimum tensile strength of the chain50% to 60%. By pre tensioning, the irregular frame of the chain is well corrected, making the chain more flexible, ensuring even force distribution on the chain plate, and improving the fatigue performance of the chain. oneGenerally speaking, by adopting a series of reinforcement measures such as chain design and manufacturing processes, the fatigue performance of the specialized plate chain for the stacker crane can be improved to 10⁷The second highestLevel.

Main design requirements for chains used in parking equipment
Due to the fact that parking equipment is a special type of equipment that involves personal and financial safety, and the chain used for parking equipment is used to park the main body of the equipmentThe first action
Secondary transmission. Therefore, the reliability and safety factor of this secondary transmission component are higher than those of general transmission chains. Therefore, the designWhen selecting, it is necessary to consider the following characteristics and requirements of parking equipment roller chains compared to ordinary transmission precision roller chains:

The non-standard chain has a high load-bearing capacity and requires high tensile strength (static strength), and its minimum tensile strength requirement is higher thanThe precision roller chain of GB/T1243 has a height of 10% to 30%.

Due to the surface flatness of the chain being limited by the lifting channel of the parking equipment, certain regulations need to be made for the twisting of the chain， JB/T11079-2011 stipulates that the relative twist angle at both ends of the chain should not exceed 5 °/m. Usually, we should try our best to control it within a certain rangeWithin the range of 4 °/m.