Author
Xiang Yu Zhao
Bio: Xiang Yu Zhao is an academic researcher from Harbin Institute of Technology. The author has contributed to research in topics: Superplasticity & Die (manufacturing). The author has an hindex of 2, co-authored 2 publications receiving 4 citations.
Papers
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Patent•
22 Apr 2015
TL;DR: In this article, a device and a method for hot forming of a titanium alloy corrugated pipe through current assistance was proposed, which solved the problem of high cost and low in production efficiency.
Abstract: The invention discloses a device and method for hot forming of a titanium alloy corrugated pipe through current assistance, and relates to a device and method for hot forming of a corrugated pipe. The device and method for hot forming of the titanium alloy corrugated pipe through current assistance solve the problem that an existing titanium alloy corrugated pipe is difficult to manufacture, and high in cost and low in production efficiency. According to the device, the positive pole and the negative pole of an electrode (3) tightly sleeve the upper end and the lower end of a tube blank (10), a low-voltage high-current power source (5) is connected with the positive pole and the negative pole of the electrode (3) through a wire (4), a gas cylinder (7) is connected with a gas guide pipe (11) on the tube blank (10) through a gas pipe (6), and a forming die (2) is placed on a working platform of a press machine (1). The method comprises the steps that the first step, the tube blank (10) is manufactured; the second step, die setting is conducted; the third step, device installation is conducted; the fourth step, the corrugated pipe is formed; the fifth step, discharging is conducted; the sixth step, post-processing is conducted. The device and method are used for manufacturing the titanium alloy corrugated pipe.
2 citations
TL;DR: In this article, current assisted superplastic forming technology was used to process titanium alloy bellows, which could overcome some shortcomings of traditional super plastic forming effectively, such as slow heating rate, high energy loss and low production efficiency.
Abstract: Titanium alloy bellows has advantages of light weight, excellent mechanical property, good heat resistance and corrosion resistance, etc. But the cold formability of titanium alloy is poor, so it is difficult to manufacture titanium alloy bellows by traditional mechanical forming and hydroforming. In this paper, current assisted superplastic forming technology was used to process titanium alloy bellows, which could overcome some shortcomings of traditional superplastic forming effectively, such as slow heating rate, high energy loss and low production efficiency. And titanium alloy bellows formed by this technology is of good quality with uniform wall thickness, light oxidation.
2 citations
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TL;DR: In this article, the effects of current-assisted heat treatment (CAHT) on phase transformation, recrystallization, and texture evolution of the Ti-22Al-24Nb-0.5Mo alloy were systematically investigated using scanning electron microscopy coupled with electron backscattered diffraction (SEM-EBSD).
11 citations
Patent•
03 Aug 2016
TL;DR: In this article, the machining and forming equipment for an oil cooler metal pipe is described. But the pipe fitting is fed into a ring penetrating device to complete ring penetrating, and a second bump forming device is formed at the second end, a ring part can be restricted between the two bumps.
Abstract: The invention discloses machining and forming equipment for an oil cooler metal pipe. A feeding device feeds a pipe fitting to be machined into a first bump forming device. After a first bump is formed at one end of the pipe fitting to be machined in the first bump forming device, a first clamping device discharges the pipe fitting from the first bump forming device and slides to a clamping station, a second clamping device slides on a second sliding rail to take the pipe fitting down from the first clamping device, then the second clamping device moves on the second sliding rail and a first guide rail to feed the end, on which no bump is formed, of the pipe fitting into a ring penetrating device to complete ring penetrating, the pipe fitting continues to be fed into a second bump forming device so that a bump can be formed at the second end, a ring part can be restricted between the two bumps, a third clamping device moves on the second sliding rail and a second guide rail to feed the machined pipe fitting into a collecting device after discharging the machined pipe fitting, and meanwhile the second clamping device repeats the feeding process from the first bump forming device to the ring penetrating device along with moving of the third clamping device.
1 citations
Patent•
02 Nov 2018
TL;DR: In this article, a method for differential temperature stretch bending forming of aluminum lithium alloy section bar through self-resistance heating is presented. But the method is not suitable for the case of complex shapes.
Abstract: The invention provides a method for differential temperature stretch bending forming of aluminum lithium alloy section bar through self-resistance heating. The method comprises the following steps of:putting a section bar blank; pre-bending; arranging a contact electrode; heating the section bar blank under the combined action of a PID (Proportion Integration Differentiation) control system, a contact thermocouple and a pulse power supply; carrying out stretch bending forming; and taking a piece. The method changes the local temperature of the section bar in a self-resistance heating manner,and can realize the stretch bending forming of pieces with complicated shapes; and compared with the room temperature stretch bending, the method greatly improves the shaping capacity of the section bar.
TL;DR: In this article, the authors investigated the use of room-temperature hydroforming as a method for production of Ti-6Al-4V titanium alloy orthopedic acetabular cups.