Titanium alloy plate rubber hot forming device and method

Abstract

The invention discloses a titanium alloy plate rubber hot forming device and method. Comprising a rubber containing frame, common rubber, heat-resistant rubber, asbestos cloth, a low-carbon steel plate, a titanium plate to be processed, a mold and a heatable workbench. The method comprises the following steps: firstly, heating a mold by using a heating rod so as to heat a plate, when a thermocouple sensor on the mold detects that the mold reaches a specified temperature, pushing a rubber accommodating frame by a press, filling the whole rubber accommodating frame with common rubber, clinging to heat-resistant rubber, and tightly pressing asbestos cloth, a low-carbon steel plate and a titanium plate to be processed in sequence until the titanium plate is tightly attached to the mold; and the deformation resistance of the material is reduced, springback is reduced, and finally forming of the titanium alloy plate is completed.

Description

Technical Field

[0001] The invention relates to sheet metal parts forming technology and mold fields, in particular to a rubber hot forming method for a titanium alloy sheet. Background Art

[0002] With the development of the aerospace industry, the requirements for aviation parts are getting higher and higher, and they are constantly developing towards complexity, precision and lightness. Rubber forming, as one of the important sheet forming process methods, can effectively form these difficult-to-process materials through uniform pressure distribution, manufacture parts with complex shapes, and ensure that the processed parts have high precision and good surface quality.

[0003] In order to reduce the weight of aircraft and improve their performance, the aerospace industry has adopted a large number of high-strength, lightweight metal materials, such as titanium alloys. However, at room temperature, titanium alloys have poor forming properties, which brings certain challenges to manufacturing. The use of rubber forming technology to process sheet materials also has problems such as wrinkling, cracking and rebound. In particular, due to the relatively low hardness of rubber, it is difficult to form high-strength materials such as titanium alloys, which has always been a problem that restricts the further expansion of rubber forming applications.

[0004] Therefore, the prior art has defects and needs to be improved. Summary of the invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a titanium alloy plate rubber hot forming device and method.

[0006] The main purpose of the present invention is achieved through the following solutions:

[0007] A titanium alloy sheet rubber hot forming device comprises a rubber containing frame, in which ordinary rubber, heat-resistant rubber, asbestos cloth, low-carbon steel plate, and a titanium plate to be processed are stacked in sequence, and also comprises a forming mold and a heatable workbench. The mold can be heated to a set temperature, and the heat of the mold is transferred to the titanium plate to be processed to heat the forming area of ​​the titanium plate to be processed to the set temperature; the asbestos cloth separates the low-carbon steel and the heat-resistant rubber; the low-carbon steel plate completely covers the titanium plate to be processed during processing.

[0008] A titanium alloy sheet rubber hot forming device, wherein the titanium sheet to be processed is placed on a forming die; the forming die is fixed on a workbench through a countersink, and a thermocouple sensor is installed on the side wall of the forming die.

[0009] The titanium alloy sheet rubber hot forming device, the heat-resistant rubber, the heat-resistant rubber can withstand a high temperature of 290-300°C, and the flow properties remain unchanged during the forming process.

[0010] Titanium alloy sheet rubber hot forming device, the low carbon steel plate, the thickness is 1mm, more flexible than the titanium plate to be formed, better surface quality, completely covers the titanium plate to be processed, separates the asbestos cloth from the titanium plate, and prevents the asbestos cloth from leaving indentations on the titanium plate during processing.

[0011] A titanium alloy sheet rubber hot forming device, wherein the forming mold is made of a material that is resistant to high temperatures and has good thermal conductivity, and a thermocouple sensor is installed on the side wall of the forming mold to monitor the mold temperature in real time.

[0012] A titanium alloy sheet rubber hot forming device, wherein the heated workbench has a hole for installing a heating rod, a control line is led out from the bottom, and the workbench surface size and the rubber frame form a matching size with a gap of less than 5mm.

[0013] According to the method of rubber hot forming of titanium alloy sheet material according to any of the above devices, the forming mold is first heated by a heating rod. When the thermocouple sensor measures that the forming mold has reached a specified temperature, a press pushes the rubber frame, and ordinary rubber fills the entire rubber frame, tightly against the heat-resistant rubber, and in turn presses the asbestos cloth, the low-carbon steel plate, and the titanium plate to be processed until the titanium plate to be processed is tightly fitted with the mold, and finally the forming of the titanium plate is completed.

[0014] By adopting the above scheme, on the one hand, asbestos cloth is used for heat insulation to prevent the heat-resistant rubber from changing its flow properties due to overheating; on the other hand, low-carbon steel plate is used to prevent the asbestos cloth from causing indentations on the parts after forming, thereby ensuring the forming accuracy and surface quality of the parts from two aspects. The present invention can perform rubber forming on titanium alloy sheets under high temperature conditions, reduce forming resistance, reduce springback, and improve sheet forming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of hot forming of rubber of titanium alloy sheet;

[0016] Figure 2 Schematic diagram of hot forming of rubber of titanium alloy sheet;

[0017] Figure 3 Actual picture of rubber forming of titanium alloy sheet; DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with specific embodiments.

[0019] like Figure 1-2As shown, a titanium alloy sheet rubber hot forming device includes a rubber frame, in which ordinary rubber 5, heat-resistant rubber 4, asbestos cloth 3, low-carbon steel plate 2, and a titanium plate to be processed 1 are stacked together in sequence, and also includes a forming mold 8 and a heatable workbench 9. The mold 8 can be heated to a set temperature, and the mold 8 is used to transfer heat to the titanium plate to be processed to heat the forming area of ​​the titanium plate to be processed to the set temperature. The ordinary rubber occupies most of the volume of the rubber frame and is tightly attached to the heat-resistant rubber during processing; the heat-resistant rubber is used as the main forming medium; the inner wall size of the rubber frame and the outer wall of the heated workbench 9 form a gap of less than 5mm, forming a sealing structure during forming; the asbestos cloth 3 must completely separate the low-carbon steel plate 2 from the heat-resistant rubber 4, greatly reducing heat transfer and preventing excessive temperature from affecting the flow properties of the heat-resistant rubber 4; the low-carbon steel plate 2 must be made of a material with good plasticity, and at the same time should be able to completely cover the titanium plate 1 to be processed to prevent the asbestos cloth 3 from leaving indentations on the titanium plate, thereby affecting the surface quality of the titanium plate; the mold 8 should be made of a material with good thermal conductivity to help the titanium plate to be processed quickly heat up to the required forming temperature.

[0020] When in use, the first layer in the rubber container is filled with ordinary rubber 5, followed by heat-resistant rubber 4, asbestos cloth 3, low-carbon steel plate 2, and titanium plate 1 to be processed, which are placed on the mold and sheet material support. The mold and sheet material support are fixed on a heated workbench, and a thermocouple sensing device is set on the workbench to monitor the mold temperature.

[0021] First, the mold is heated by a heating rod and the heat is transferred to the titanium plate to be processed. When the thermocouple sensor measures that the mold has reached 600°C, processing begins. The press pushes the rubber frame, and the ordinary rubber fills the entire rubber frame, close to the heat-resistant rubber, and presses the asbestos cloth, low-carbon steel plate, and titanium plate to be processed in turn. The sheet support 7 compresses the spring 6 to keep the sheet balanced until the titanium plate fits tightly with the mold 8, and the pressure is maintained for a period of time to finally complete the forming of the titanium plate. After the forming is completed, the rubber frame moves up, and the ordinary rubber 5, heat-resistant rubber 4, and spring 6 restore their shapes. The obtained object is as follows Figure 3 As shown in the figure, the springback is reduced and the titanium alloy sheet is easier to form at high temperature.

[0022] It is worth noting that the gap between the outer side of the sheet material support platform and the rubber frame should be less than 1mm to ensure that the rubber forming is carried out in a sealed environment; the mold 8 is fixed on the heating workbench 9 in the form of a countersunk threaded connection; the spring 6 plays the role of supporting the sheet material support plate and is made of high temperature resistant material; the sheet material support plate and the heating workbench are connected with a gap fit, and the support plate can slide up and down along the hole during forming; the thermocouple sensor is installed on the side wall of the mold, and its lead can pass through the hole in the heated workbench and be connected to the external monitoring equipment.

[0023] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A titanium alloy sheet rubber hot forming device, characterized in that: It includes a rubber frame, in which ordinary rubber, heat-resistant rubber, asbestos cloth, low-carbon steel plate, and titanium plate to be processed are stacked in sequence. It also includes a forming mold and a heated workbench. The mold can be heated to a set temperature, and the heat of the mold is transferred to the titanium plate to be processed to heat the forming area of ​​the titanium plate to be processed to the set temperature; the asbestos cloth separates the low-carbon steel and the heat-resistant rubber; the low-carbon steel plate completely covers the titanium plate to be processed during processing.

2. The titanium alloy sheet rubber hot forming device according to claim 1 is characterized in that: The titanium plate to be processed is placed on a forming die; the forming die is fixed on a workbench through a countersink, and a thermocouple sensor is installed on the side wall of the forming die.

3. The device for hot forming rubber of titanium alloy sheet according to claim 1, characterized in that: The heat-resistant rubber can withstand a high temperature of 290-300° C., and its flow properties remain unchanged during the forming process.

4. The titanium alloy sheet rubber hot forming device according to claim 1, characterized in that: The low carbon steel plate has a thickness of 1 mm, is more flexible than the titanium plate to be formed, has a better surface quality, and completely covers the titanium plate to be processed, separating the asbestos cloth from the titanium plate to prevent the asbestos cloth from leaving indentations on the titanium plate during processing.

5. The titanium alloy sheet rubber hot forming device according to claim 1, characterized in that: The forming mold is made of a material that is resistant to high temperatures and has good thermal conductivity. A thermocouple sensor is installed on the side wall of the forming mold to monitor the mold temperature in real time.

6. The titanium alloy sheet rubber hot forming device according to claim 1, characterized in that: The heating table has a hole for installing a heating rod, and a control line is led out from the bottom. The size of the work table and the rubber frame form a matching size with a gap of less than 5 mm.

7. A method for hot forming of titanium alloy sheet rubber according to any one of claims 1 to 6, characterized in that: First, the forming mold is heated by a heating rod. When the thermocouple sensor measures that the forming mold has reached the specified temperature, the press pushes the rubber frame. Ordinary rubber fills the entire rubber frame, tightly against the heat-resistant rubber, and in turn presses the asbestos cloth, low-carbon steel plate, and titanium plate to be processed until the titanium plate to be processed fits tightly with the mold, and finally the forming of the titanium plate is completed.

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