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In 1987, VSEL (Vickers Shipbuilding and Engineering Co., UK) responded to this demand in the United States by providing a new type of howitzer design. What is unique about this design proposal is that the newly designed howitzer has the firepower of a traditional 155mm howitzer, but weighs only 3,629kg. This weight is 4) 4kg lower than the weight required by the US Army, about half the weight of a traditional artillery.
In order to achieve this indicator, a large number of materials were identified. The material selected is TiCr. 318 titanium alloy. The reason for choosing this material is that the strength/weight ratio is high and can be processed substantially by conventional production equipment and manufacturing techniques.
To execute a sample manufacturing plan, you must work with the same company. The company not only has the technology needed to shape, manufacture and machine this special material, but also leads a technical organization whose design knowledge and cutting technology knowledge complement the work of the NSEL engineering team.
Cutting methods are of particular importance. Improvements to the methods determined during the sample development phase must be practical in order to produce the various components. The professional company selected for this project is Bunting Titanium. The company finally developed a component structure for each product, laying the groundwork for future modifications, which means that parts can be changed with minimal modifications or with minimal replacement costs.
At the end of 1987, John Ryder, managing director of Bunting Titanium, discussed the project in detail with the VSEL engineering team headed by military chief designer Jim Bone and project manager Mike Macur, who is in charge of the ultralight field howitzer project.
After several months, the component design drawings and the special fixtures and tools and planning schemes required for the main gun cradle were validated. As John Ryder said, “We are engaged in projects that we have never heard of, especially since we are in the project, starting from scratch, processing the materials that VSEL designers have never used before.â€
VSEL ​​has had experience with high-strength maraging steel, which is the main structural material used in the FH70 weapons currently used by the British Army and the NATO Army. Although VSEL engineers know that titanium can be used as a structural material, they have not used titanium design experience in the past.
Due to the short time required, a working group is formed based on the close relationship formed between the design engineer, the project manager and the sales manager of the Ordnance Department. This holistic design and management approach ensures that product assembly is completed for the required purpose within tight deadlines.
In March 1988, Bunting Engineering signed the first contract to manufacture two sample cradle and all related fixtures, tools and installation equipment.
After the contract, the post-manufacturing station was obtained, and the barrel was retracted from the yoke. High and low yokes and a full set of plus-CiE orders. Bunting Engineering also works closely with VSEL's suspension systems supplier to manufacture and machine complex cantilevers, bushings and pivots.
The total weight of the ultralight howitzer is 3.7t. The steel weapon parts are approximately 2t, and the remaining structural parts made of titanium alloy are approximately 1t.
At the beginning of 1989, some contracts were signed for the manufacture of two prototype gun shooting discs and related manufacturing tools.
In mid-October 1989, the finished product exhibition was presented at the Washington Defense Exhibition and received an excellent evaluation. During 1989, a continuous shooting test was conducted at the Eskmeals shooting range in Cumbria. At the beginning of 1990, a new rare test result was obtained. The US Army and Marine Corps conducted a continuous test at the Ynman Shooting Range in the United States with a prototype.
Application of Titanium Alloy in Field Howitzer
In the mid-1980s, the US Army proposed a new generation of field howitzers. The gun can be quickly deployed with the UH60 helicopter as a whole, and can be deployed quickly as an easy-to-remove and assembled component with other helicopters with less lifting capacity.