DL 01 Metal stamping part for smart door lock

Part 1：  Materials for metal stamping Solenoid locks 

 1.1： Low carbon steel:  such as Q195, Q215, Q235, etc., its have good plasticity and stamping properties, and are relatively cheap. They are suitable for Solenoid lock metal stamping parts with low strength requirements, such as Solenoid lock shells, covers, etc.

1.2： Medium carbon steel: For example, 45 steel, after proper heat treatment, can obtain higher strength and hardness, and is often used in Solenoid locks that require certain strength parts, such as lock tongues, lock buckles, etc.

 1.3： Stainless steel: such as 304, 316, etc., have good corrosion resistance, oxidation resistance and aesthetics, and are suitable for Solenoid lock parts with high environmental adaptability requirements, such as Solenoid locks used outdoors or Solenoid lock metal stamping parts in humid environments.

1.4 Copper and copper alloys: have good electrical conductivity, thermal conductivity and corrosion resistance, and are easy to process and shape. They are often used in some electrical connection parts in Solenoid locks or parts that require good heat dissipation performance, such as the terminal blocks of Solenoid coils.

1.5： Aluminum alloy: low density, high strength, good corrosion resistance and processability, can reduce the weight of Solenoid locks, and are often used in Solenoid lock parts that have weight requirements, such as the shells of some portable or small Solenoid locks.

Part 2 : Common problems

2.1  Size and shape problems

Size deviation: Insufficient mold design or manufacturing accuracy leads to deviations between the actual size of the stamping and the design size, affecting the assembly and use performance of the Solenoid lock. For example, if the length or width of the lock tongue is inaccurate, the lock tongue may not be inserted into the lock buckle normally or the matching gap with the lock buckle is too large, reducing the locking reliability of the Solenoid lock 3.

Irregular shape: During the stamping process, uneven material flow or unreasonable mold structure may cause the shape of the stamping to deform, such as bending, twisting, etc. This not only affects the appearance of the Solenoid lock, but may also cause incoordination of its internal structure, increasing the difficulty of assembly.

2.2  Surface quality issues

Burrs: If the blanking gap is too large, too small or uneven, and the die edge is worn, burrs will appear on the edge of the stamping part3. Burrs not only affect the appearance of the Solenoid lock hardware stamping parts, but may also scratch the user's skin or other objects, and even fall off during use and enter the inside of the Solenoid lock, affecting its normal operation.

2.3 Scratches and abrasions: During the stamping production process, there may be scratches on the surface of the raw materials, or during the stamping, handling, storage and other links, the friction between the stamping parts and the mold, equipment or other objects may also cause surface scratches and abrasions, destroying the integrity of the surface and reducing its corrosion resistance and aesthetics.

2.4 Surface rust: If the material of the hardware stamping parts is not properly selected, or the surface treatment process is not perfect, during use, the stamping parts are easily affected by environmental factors and rust, affecting the service life and appearance of the Solenoid lock.

2.5 Structural and performance issues

Deformation and warping: During the stamping process, due to the uneven distribution of the internal stress of the material or unreasonable stamping process parameters, the stamping parts may be deformed or warped. For example, the shell of the Solenoid lock warps after stamping, which will affect the assembly accuracy with other parts, resulting in reduced sealing performance and even the overall strength of the Solenoid lock.

2.6 Cracks and fractures:

Quality problems of raw materials, such as impurities, pores and other defects, or improper stamping process, such as excessive stamping force, small bending radius, etc., may cause cracks or even fractures in stamped parts, seriously affecting the safety and reliability of Solenoid locks 

2.7 Assembly problems:

Unreasonable design of stamped parts, such as inaccurate size or position of holes and slots, will lead to loose fit or inability to properly install parts when assembling Solenoid locks, increase assembly difficulty, reduce production efficiency, and may even affect the overall performance of Solenoid locks.