Numerical Analysis of Lateral Forces in a Die for Turbine Blade Forging

Kocańda, A.; Czyżewski, Piotr; Mehdi, Khedheyer H.

doi:10.1016/s1644-9665(12)60068-5

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…The test blade is a near-net-shape blank [13], and the blank leaves a 1-mm allowance. For the design accuracy, the following requirements are satisfied: the positional tolerance of the section is ±0.06 mm, the profile tolerance of the surface ranges from −0.06 to +0.04 mm, and the torsional angle is not more than 10′.…”

Section: Experimental Conditionsmentioning

confidence: 99%

A control process for machining distortion by using an adaptive dual-sphere fixture

Chen

Jiang

2016

Int J Adv Manuf Technol

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Blades are affected by clamping, cutting forces, and residual stress, thus resulting in warping and distortion because of the thin wall and free surfaces. In this paper, a new process for the control of machining distortion is proposed to eliminate surface errors by using an adaptive dual-arm fixture. First, some causes of distortion by different machining methods are discussed. Second, an adaptive mechanism with eight degrees of freedom is designed to allow the blade to be clamped under an unstressed state and to enable the release of stress at any time. Thereafter, a dual-sphere fixture is designed on the basis of the adaptive mechanism. Finally, by adopting this process based on the adaptive dual-arm fixture, machining distortion is reduced after releasing stress several times. Experimental results show that the process can eliminate 50 % of surface errors in machining. Therefore, a test blade machined by the proposed process will exhibit improved precision.

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Section: Experimental Conditionsmentioning

confidence: 99%

A control process for machining distortion by using an adaptive dual-sphere fixture

Chen

Jiang

2016

Int J Adv Manuf Technol

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“…To minimize the interference of these factors, the relevant manufacturing fields generally use various methods such as forging, precision casting, milling, manual grinding, and rough-to-finish machining methods. First, the blade blank is obtained by precision casting (wax casting) or precision forging (die forging) and other methods, 2 –7 followed by machining for the purpose of finishing. After the polishing by polishing and grinding tools such as abrasive belts, pneumatic pressure wheels, and louvers wheel, 8,9 the surface margin of the blades and casting defects are removed, and the surface accuracy of the blades meets the design requirements.…”

Section: Introductionmentioning

confidence: 99%

The blade surface performance and its robotic machining

Qiu

Liu

et al. 2020

International Journal of Advanced Robotic Systems

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Through numerical calculations, it could be found that when the blade surface quality reaches a certain level, the surface quality of the blade was continuously improved, and the guarantee effect on its performance would be weakened. Under this circumstance, continuing to improve the surface quality of the blade had no positive effect on the performance of the blade. Studies had shown that when the blade surface equivalent grit roughness Ks reaches 4.96 (about R a = 0.8 µm), the blade performance was close to the smooth surface of the blade, and no further processing was required to improve the surface roughness. When the surface equivalent grit Ks was greater than 4.96 µm, the surface roughness had a great influence on the blade performance. When Ks was larger than 40 µm, the negative effect is significantly increased. For the different characteristics of the blade and different processing conditions, four kinds of robot-based blade surface grinding schemes were proposed, of which the core content was the robot layout. Based on the robot group’s fitting to the spatial surface and the path planning, the experimental verification was carried out.

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“…Nowadays, forging is still a recurrent manufacturing process in several industrial sectors such as automotive, aerospace, railway, naval, oil, mining and health, where the end products are difficult to make due to the high strength, thinner section and/or large size [1]. Accordinly, four factors are crucial to achieve an efficient forging procedure: specimen to forge [2][3][4][5][6][7], forging dies [8][9][10][11][12], operational parameters [13][14][15][16][17] and the forging device [18][19][20]. Much literature has been published about the first three factors.…”

Section: Introductionmentioning

confidence: 99%

“…The experimental trials performed in a real production line showed that the coated dies enhance their lifespan, particularly the surfaces coated with cobalt base. Kocanda et al [10,12] accomplished several forging experiments with non-symmetrical configurations to analyze the flow of the material inside the forging die and the effects of die cavity. A proper design of the die can rise the efficiency of forging for non-symmetrical specimens and minimize lateral forces.…”

Section: Introductionmentioning

confidence: 99%

Short-Cut Method to Assess a Gross Available Energy in a Medium-Load Screw Friction Press

Egea

Deferrari

Abate

et al. 2018

Metals

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The present study proposed a rapid method, based on a previous universal compression tests, to estimate the required load capacity to cold forge different specimen quantity in a screw press. Accordingly, experimental and theoretical approach are performed to check new adjustable drive motor of the modified forging machine to achieve a gross available energy to deform the specimens preventing damage of the forging machine. During the forging experiments, two screw friction presses (as-received and modified) are used to validate the theoretical approach. The modified press exhibits an increase of 51% of gross energy and 11% of maximum load capacity compare to the as-received press. This method is used to improve the effective of the forging process avoiding excessive loads that could promote machine failure. Therefore, a low-cost and easy to implement methodology is proposed to determine the energy and load capacity of a screw friction press to forge different specimen quantities with symmetry pattern configurations.

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Numerical Analysis of Lateral Forces in a Die for Turbine Blade Forging

Cited by 8 publications

References 6 publications

A control process for machining distortion by using an adaptive dual-sphere fixture

A control process for machining distortion by using an adaptive dual-sphere fixture

The blade surface performance and its robotic machining

Short-Cut Method to Assess a Gross Available Energy in a Medium-Load Screw Friction Press

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