Number of lock heads and insertion rods on the door

好选择2个锁头各控制2个插杆的门，即使能被破坏，也会拖延时间。一般来讲，一个锁头可控制34根插杆，这样的门防盗性能较差，一旦锁头被损坏，几根插杆同时失去作用。

It is best to choose a door with two locking heads each controlling two insertion rods, even if it can be damaged, it will delay time. Generally speaking, a lock can control 3 to 4 locking rods, but this type of door has poor anti-theft performance. Once the lock is damaged, several locking rods will lose their function at the same time.

检查门锁性能及结构

Check the performance and structure of the door lock

选择防钻锁头，钻头钻进锁孔后，旋转时锁头会跟随钻头同步旋转，可起到锁头不被破坏的作用。锁具要求三方位锁闭结构，单开门3个合页，双开门6个合页，门扇与门框加暗锁，即使合页被錾掉，门也打不开。

Choose an anti drilling lock head. After the drill bit enters the lock hole, the lock head will rotate synchronously with the drill bit during rotation, which can prevent the lock head from being damaged. The lock requires a three directional locking structure, with three hinges for a single door and six hinges for a double door. The door leaf and frame are locked with a concealed lock, and even if the hinges are chiseled off, the door cannot be opened.

看锁具周围加强板的厚度和面积

Check the thickness and area of the reinforcing plate around the lock

铜门从结构设计上分封闭式和栅栏式两种，不论选择哪一种，锁具是盗窃破坏的主要部位，所以锁具护心板应是厚度超过2毫米的冷钢板，护心板的高度不小于500毫米。

Copper doors can be divided into enclosed and fence types in terms of structural design. Regardless of which type is chosen, locks are the main part of theft and damage. Therefore, the lock guard plate should be a cold steel plate with a thickness of more than 2 millimeters, and the height of the guard plate should not be less than 500 millimeters.

看工艺质量如何

How to check the quality of the craftsmanship

铜门材料选择是根本，制作工艺质量是关键。特别应注重检查有无焊接缺陷，诸如开焊未焊漏焊夹渣等现象。看门扇与门框的配合是否密实，间隙是否均匀一致，开启是否灵活，所有接头是否觅食，油漆电镀是否均匀牢固光滑等。

The selection of copper door materials is fundamental, and the quality of the manufacturing process is crucial. Special attention should be paid to checking for welding defects, such as incomplete welding, missed welding, and slag inclusion. Check whether the fit between the door leaf and the door frame is tight, whether the gap is uniform and consistent, whether the opening is flexible, whether all joints are foraging, and whether the paint and electroplating are uniform, firm, and smooth.

对开铜门一般在门洞宽度较大时，为了开启方便与美观而设计成对开铜门。其中一个门扇安装锁具，另一个门扇安装假锁并配带插销。

Generally, when the width of the door opening is large, it is designed as a pair of copper doors for convenience and aesthetics. One door leaf is equipped with a lock, while the other door leaf is equipped with a fake lock and a latch.