Raised Face Blind Flange

Precautions for blind flange:

In oil medium systems, it is not recommended to use flange blind plates that have been galvanized. However, for other medium systems, it is essential to use hot-dip galvanized flange blind plates. The small zinc coating on the plates should weigh around 610g/m2. Moreover, it is essential to ensure that the quality inspection of hot-dip galvanizing is in line with cb*/z343 guidelines.

Production process of flange blind plate:

The process of forging typically involves four main steps, which are billet blanking, heating, shaping, and cooling. Depending on the specifications of the forging and the production quantity, different methods such as free forging, die forging, or roll forging may be utilized. The selection of the appropriate forging method is essential in achieving the desired quality and characteristics of the final product.

Free forging is a process that is often used to manufacture single piece and small batch forgings with simple shapes. While the productivity of this method is relatively low, the tools used are simple and versatile, making it a popular choice. However, one downside is that free forging requires a large amount of machining allowance. The equipment used for free forging includes air hammers, steam air hammers, and hydraulic presses, which are respectively suitable for the production of small, medium, and large forgings.
On the other hand, die forging is a process that is easy to operate and allows for mechanization and automation. This method results in forgings with smaller sizes and machining allowances. Furthermore, the fiber structure distribution of the forgings is reasonable. These benefits can help to improve the service life of the resulting parts. In contrast to free forging, die forging is often used for larger batch productions. Overall, both methods have their own advantages and are suitable for different production needs.

During the process of free forging, different shaping techniques are used to gradually shape the forging from the initial blank. These shaping techniques primarily comprise upsetting, drawing, punching, bending, and cutting. Through these basic deformation processes, the blank is transformed into the desired shape, resulting in a finished forging.

Upsetting is a crucial operation in the forging process, which involves forging the raw material along the axial direction to decrease its height while simultaneously enlarging its cross section. This method finds frequent application in the forging of gear blanks and other disc forgings, allowing for the desired shape and size to be achieved. There are two primary types of upsetting: full upsetting and partial upsetting. These classifications highlight the extent to which the material is forged, with full upsetting encompassing a complete reduction in height, while partial upsetting involves a partial reduction.

Lengthening, a forging process commonly used in the production of shaft blanks such as lathe spindle and connecting rod, involves increasing the length of the blank while reducing its section.

The process of punching a forging involves using a punch to create through holes or openings in a blank. This is a technique commonly used in the manufacturing industry to create precise and uniform holes in metal materials. With the help of specialized tools and machinery, skilled workers carefully punch through the metal surface to create the desired shape and size of the holes. This process is essential in a wide range of applications, including the production of machine parts, jewelry, and other metal-based products. By punching through the metal, manufacturers can create intricate designs and patterns that enhance the visual appeal and functionality of their products.

A method of forging that involves the deformation of a blank into a desired angle or shape by bending.

Rotational forging is a process that involves rotating one portion of a blank relative to another. This technique allows for the creation of intricate shapes and designs in the final product.

6. The forging process of cutting the divided blank or cutting off the head.

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