Cast iron base plate, test bench plate is the large base plate of the test bench for testing the running-in, loading, vibration, and fatigue performance of the automobile, reducer, gearbox, motor and other scientific research institutes and production unit laboratories during the product bench test. It belongs to the core component of the test bench, the cast iron base plate of the test bench has a T-shaped groove on the working surface, which is used to fix the workpiece and the product, and the material is HT250 high-strength cast iron.

 

cast iron base plate

 

During the installation process of the anchor bolts and the cast iron platform, it is easy to cause the anchor bolts to protrude too long or too short on the base of the platform.

 

The main reasons are as following:

1. The length of the anchor bolts is not standard;

2. The depth of the reserved hole does not meet the requirements;

3. The installation height of the anchor bolts in the reserved holes is incorrect.

 

Excessively exposed threads of anchor bolts are neither great nor easy to be damaged. If the thread is too short, the force of the bolt will not meet the requirements, which will affect the stability of the equipment.

 

There are two ways to deal with this.

1. According to the requirements of the cast iron platform, the anchor bolts are selected correctly. (There are two types of anchor bolts: long type and short type.)

2. The installation of anchor bolts. The hole depth in the reserved holes should be appropriate, the verticality should not exceed 10/1000, the bolt head should not be close to the bottom of the hole, and the distance between the bolt and the hole wall of the cast iron platform should not be less than 15mm. After the nut is tightened, the exposed length of the thread is 1/3~2/3 of the bolt diameter. For dead anchor bolts, the treatment method for the thread exposed to be too long is to cut off a part of the thread, and then set the thread; when it is too short, it can be heated with an oxyacetylene flame to be red and stretched slightly. If the deviation is too large, the concrete around the anchor bolts can be dug to the depth, the bolts can be cut off, and the newly processed screws can be welded and reinforced.