Technological and construction aspects of the process of hot extrusion of twist drills

Bulzak, Tomasz; Pater, Z.; Tomczak, J.; Majerski, Krzysztof

doi:10.1016/j.jmapro.2019.06.034

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…The experimental result revealed that a relatively high forming precision and relatively low damage value of 304 stainless was obtained under the rolling depth of 3.3 mm and formation speeds below 15 mm/s. Bulzak et al [35,36] analysed the forward extrusion forming (FEF) process of twist drills, as shown in Figure 7. During the extrusion process, the starting materials were heated to a suitable temperature for hot forming.…”

Section: Solid Plastic Forming Processmentioning

confidence: 99%

“…The results demonstrated the feasibility of the production of either hollow or solid screw rods with a high uniformity in wall thickness by the RCFF process. They found that when the belt height where the die works Bulzak et al [35,36] analysed the forward extrusion forming (FEF) process of twist drills, as shown in Figure 7. During the extrusion process, the starting materials were heated to a suitable temperature for hot forming.…”

Section: Solid Plastic Forming Processmentioning

confidence: 99%

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Research Progress on the Manufacturing of Screw-Shaped Parts in Screw Compressors

Wang,

Xiong,

Feng

et al. 2024

Applied Sciences

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Screw compressors are highly researched and developed prospects in industry because of their long service life, high transmission efficiency, low footprint and low vibration. As the key core part of the screw compressor, the screw is a typical, long-shaft, complex profile part. Its processing method, manufacturing accuracy and quality have an extremely important impact on the performance of the whole screw compressor. In this work, the research progress on the manufacturing of screw-shaped parts in screw compressors is summarised from the aspects of the cutting process, solid plastic forming, casting and additive manufacturing. The merits and demerits of these manufacturing processes are provided and discussed, which is conducive to the development of the high-efficiency, precise and high-performance forming process of screw-shaped parts. Additionally, a novel forming process is proposed to solve the problems of serious material waste and low production efficiency for the screw-shaped parts. In the proposed process, the semi-solid spherical grain is firstly prepared by radial forging and the isothermal treatment of long-shaft raw materials. The large strain energy can be stored in the bar by the radial forging of long-shaft raw materials, which is used to induce the generation of semi-solid spherical grains with the assistance of the isothermal procedure. After that, the screw is fabricated by the high-efficiency semi-solid closed extrusion process.

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Section: Solid Plastic Forming Processmentioning

confidence: 99%

Section: Solid Plastic Forming Processmentioning

confidence: 99%

Research Progress on the Manufacturing of Screw-Shaped Parts in Screw Compressors

Wang,

Xiong,

Feng

et al. 2024

Applied Sciences

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show abstract

“…In order to minimize the forging forces, the material is also coated with phosphate or molybdenum disulfide. Split dies can also be used for forging aluminum in isothermal conditions [13] or for extruding machining tools, such as twist drill bits [14,15].…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of hot and cold flashless forging of a stepped shaft using vertically-parted dies

Bulzak

Tomczak

Pater

2021

Int J Adv Manuf Technol

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Flashless forging is classified as a precise metal forming technology. The main advantages of this technology are the reduction of the flash allowance and the shortening of the manufacturing time by eliminating the flash trimming operation. The article presents the process of one-step forging of a stepped shaft made of aluminum with the use of split dies. The process was carried out in cold and hot metal-forming conditions. The forging process was analyzed numerically using the Simufact Forming 15.0 software. The geometrical parameters of the obtained product were analyzed, and the distribution of effective strain, temperature, and the standardized cracking criterion was determined. The process force parameters were also determined. Numerical tests were verified in real conditions with the use of a specially designed device for forging in vertical split dies. Comparison of hot and cold forging in vertical split dies is presented. The comparative analysis results have demonstrated that the hot forging process has more advantages than the cold forging process. The hot forging process ensures higher accuracy of forged parts.

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Analysis of stress behavior of drill tool by using ANSYS-2020 R2

Singh,

Gani

2024

Life Cycle Reliab Saf Eng

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Technological and construction aspects of the process of hot extrusion of twist drills

Cited by 6 publications

References 12 publications

Research Progress on the Manufacturing of Screw-Shaped Parts in Screw Compressors

Research Progress on the Manufacturing of Screw-Shaped Parts in Screw Compressors

A comparative analysis of hot and cold flashless forging of a stepped shaft using vertically-parted dies

Analysis of stress behavior of drill tool by using ANSYS-2020 R2

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