Frame structure for drawing forming of thin-wall capillary tube

Abstract

The invention provides a frame structure for drawing forming of a thin-wall capillary tube. The frame structure is composed of an outer frame made of die steel, a fixing clamp seat, a fixing clamp, a sliding rod, a long telescopic rod, a short telescopic rod and a supporting block. The sliding rods are fixed to the two sides of the interior of the outer frame. The fixed clamp seat and the fixed clamp are assembled and matched, are fixedly connected with the long telescopic rod at the upper end of the outer frame and are fixedly connected with the short telescopic rod at the lower end of the outer frame respectively, and meanwhile, the fixed clamp seat axially moves along the sliding rod; supporting blocks are fixedly installed on the two sides of the bottom of the outer frame respectively, and the supporting blocks enable the whole device to be grounded through standard foundation bolts. The design of large and thick profiles is adopted, so that the stability of the structure is ensured; according to the device, double-track sliding rod type transmission is adopted, meanwhile, a movable shaft is matched with a hydraulic chuck, stable clamping is guaranteed, and meanwhile the high centering requirement can be met.

Description

Technical Field

[0001] The present invention provides a frame structure for the drawing forming of thin-walled capillary tubes, which is applicable to the drawing forming of thin-walled capillary tubes made of superalloy, can keep the absolute straightness and stability during the drawing process of the thin-walled capillary tubes, and provides thin-walled capillary tubes with smooth surfaces for high-intensity pre-cooling heat exchangers to meet the usage requirements. It belongs to the field of aerospace science and technology. Background Art

[0002] Hypersonic aircraft have a wide range of application scenarios. In the power system of the aircraft, a high-intensity pre-cooler is a key technology to ensure the supersonic flight of the aircraft. The core component of the high-intensity pre-cooler is a thin-walled capillary tube made of superalloy. The forming process of the thin-walled capillary tube determines the final diameter, wall thickness and structural strength of the capillary tube, and also determines the final heat exchange efficiency. It is an important aspect of the overall manufacturing level of the high-intensity pre-cooler. The manufacturing process of the thin-walled capillary tube mainly realizes the reduction of the diameter and wall thickness of the tube blank through multiple drawing processes. There are high requirements for the stability of the equipment, the stability of the drawing force and the centering of the drawing direction during the drawing process. In view of the various requirements during the drawing process of the thin-walled capillary tube, it is necessary to customize and improve the equipment capabilities to produce thin-walled capillary tubes with structural strength meeting the usage requirements, which is the top priority in the research and development of the entire hypersonic high-intensity pre-cooling power system.

[0003] According to the forming process requirements of the thin-walled capillary tube of the pre-cooler in the high-intensity pre-cooled hypersonic aircraft power system, it is necessary to design a frame structure for the drawing forming of the thin-walled capillary tube to ensure the stability of the drawing force and the centering of the drawing direction during the forming process of the thin-walled capillary tube. At the same time, the device should also have the characteristics of high stability and uniform wall thickness of the thin-walled capillary tube. The traditional capillary tube drawing technology mainly realizes the forming quality of the thin-walled capillary tube by optimizing process parameters, such as the cone angle of the drawing die and other parameters, and has low requirements for the structural stability and centering of the equipment. There are certain limitations in the existing technology for small-diameter thin-walled capillary tubes with high strength, high precision and high requirements for equipment centering. Currently, there is no structural device that can meet such requirements. The present invention provides a frame structure for the drawing forming of thin-walled capillary tubes to solve the existing problems. Summary of the Invention

[0004] (1) Objectives

[0005] To ensure the stability of the drawing force and the centering of the drawing direction during the forming process of the thin-walled capillary tube used in the heat exchange tubes of the high-intensity pre-cooler, and at the same time ensure the uniform wall thickness of the thin-walled capillary tube, it is necessary to design a frame structure for the drawing forming of the thin-walled capillary tube. The present invention provides a frame structure for the drawing forming of the thin-walled capillary tube.

[0006] (2) Technical Solutions

[0007] A frame structure for the drawing forming of thin-walled capillary tubes, and its technical solution is as follows:

[0008] Figure 1 It is an assembly drawing of a frame structure for the drawing forming of thin-walled capillary tubes, mainly composed of an outer frame 1 made of die steel, a fixed clamp seat 2, a fixed clamp 3, a sliding rod 4, a long telescopic rod 5, a short telescopic rod 6, and a support block 7. The relationships among them are as follows: The sliding rod 4 is fixed on both sides inside the outer frame 1; the fixed clamp seat 2 and the fixed clamp 3 are assembled and matched, and are respectively connected to the long telescopic rod 5 and fixed at the upper end of the outer frame, and are connected to the short telescopic rod 6 and fixed at the lower end of the outer frame 1. At the same time, the fixed clamp seat 2 can move axially along the sliding rod 4; Four support blocks 7 are respectively installed and fixed on both sides of the bottom of the outer frame 1, and the support blocks 7 ground the whole device through standard anchor bolts.

[0009] The operating mechanism of this device: Install the thin-walled capillary tube drawing die at the die seat groove position of the outer frame 1, pass the thin-walled capillary tube to be drawn through the drawing die and fix it on the fixed clamp 3 at the upper end of the outer frame 1. Drive the long telescopic rod 5 through the equipment hydraulic pressure to drive the fixed clamp seat 2 and the fixed clamp 3 to move axially along the sliding rod 4 to realize the drawing forming of the thin-walled capillary tube; After drawing, fix the core mold of the thin-walled capillary tube with a core mold on the fixed clamp 3 at the lower end of the outer frame 1, fix one end of the thin-walled capillary tube on the fixed clamp 3 at the upper end of the outer frame 1, and through the guiding of the die seat groove of the outer frame 1, finally separate the core mold and the thin-walled capillary tube of the thin-walled capillary tube with a core mold, so as to realize the final forming of the thin-walled capillary tube.

[0010] For the outer frame 1, the specific structural form is shown in Figure 2 . It can be assembled by two I-beams on both sides and four middle plates. The whole is in the shape of a Chinese character "mu". There are holes for installing the long telescopic rod 5 processed in the middle of the two upper plates of the outer frame 1, and there are holes for installing the short telescopic rod 6 processed in the middle of the first lower plate. There is a die seat groove processed in the middle of the second plate for installing the drawing die and playing a guiding role for the thin-walled capillary tube at the same time. There are holes for installing the sliding rod 4 processed on both sides of the three lower plates of the outer frame 1.

[0011] For the fixed clamp seat 2, the specific structural form is shown in Figure 3 . It can be processed and reformed from a plate. The whole is in the shape of a cross. The upper end surface is respectively connected to the long telescopic rod 5 and the short telescopic rod 6. There is a groove for installing the fixed clamp 3 processed at the lower end. The fixed clamp 3 is installed on the fixed clamp seat 2 through standard bolts. Through holes are opened on both sides to facilitate the installation of the fixed clamp seat 2 on the two sliding rods 4.

[0012] For the fixed clamp 3, the specific structural form is shown in Figure 4 . It can be processed and reformed from a plate. Two long strip-shaped pressing blocks are installed in the middle of the fixed clamp 3, and the pressing and contraction of the pressing blocks are controlled through hydraulic transmission.

[0013] The sliding rod 4 is a standard - specification optical axis, and its dimensional specifications can be adjusted according to the size of the structure.

[0014] The long telescopic rod 5 is a standard hydraulic telescopic rod, and its dimensional specifications can be adjusted according to the size of the structure.

[0015] The short telescopic rod 6 is a standard hydraulic telescopic rod, and its dimensional specifications can be adjusted according to the size of the structure.

[0016] The support block 7 is a standard I - shaped steel, and its dimensional specifications can be adjusted according to the size of the structure.

[0017] (3) Advantages and effects

[0018] According to the special working - condition requirements for the forming of the thin - walled capillary of the pre - cooler in the high - speed hypersonic flight power system with strong pre - cooling, the present invention provides a frame structure for the drawing forming of thin - walled capillaries. The advantages are mainly reflected in: the device adopts a large - sized rough profile design, which ensures the stability of the structure; the device adopts a double - track sliding - rod type transmission. At the same time, the moving shaft is equipped with a hydraulic chuck to ensure stable clamping and can meet higher centering requirements. Brief description of the drawings

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the outer frame 1.

[0021] Figure 3 It is a schematic diagram of the fixed chuck base 2.

[0022] Figure 4 It is a schematic diagram of the fixed clamp 3.

[0023] The sequence numbers and symbols in the figure are explained as follows:

[0024] 1. Outer frame; 2. Fixed chuck base; 3. Fixed clamp; 4. Sliding rod; 5. Long telescopic rod; 6. Short telescopic rod. Detailed implementation manners

[0025] Please refer to Figure 1As shown in the figure, a frame structure for the drawing forming of thin-walled capillary tubes according to the present invention mainly consists of an outer frame 1 made of die steel, a fixed clamp seat 2, a fixed clamp 3, a sliding rod 4, a long telescopic rod 5, a short telescopic rod 6, and a support block 7. The relationships among them are as follows: The sliding rod 4 is fixed on both sides inside the outer frame 1; the fixed clamp seat 2 and the fixed clamp 3 are assembled and matched, and are respectively connected to the long telescopic rod 5 and fixed at the upper end of the outer frame, and are connected to the short telescopic rod 6 and fixed at the lower end of the outer frame 1. At the same time, the fixed clamp seat 2 can move axially along the sliding rod 4; Four support blocks 7 are respectively installed and fixed on both sides of the bottom of the outer frame 1, and the support blocks 7 ground the whole device through standard anchor bolts. The operating mechanism of this device: Install the thin-walled capillary tube drawing die at the die seat groove position of the outer frame 1, pass the thin-walled capillary tube to be drawn through the drawing die and fix it on the fixed clamp 3 at the upper end of the outer frame 1. Drive the fixed clamp seat 2 and the fixed clamp 3 to move axially along the sliding rod 4 by the hydraulic drive of the device to realize the drawing forming of the thin-walled capillary tube; After drawing, fix the core mold of the thin-walled capillary tube with a core mold on the fixed clamp 3 at the lower end of the outer frame 1, fix one end of the thin-walled capillary tube on the fixed clamp 3 at the upper end of the outer frame 1, and finally separate the core mold and the thin-walled capillary tube of the thin-walled capillary tube with a core mold through the guiding of the die seat groove of the outer frame 1, so as to realize the final forming of the thin-walled capillary tube.

[0026] The said outer frame 1, the specific structural form is shown in Figure 2 . It can be assembled by two I-beams on both sides and four middle plates. The whole is in the shape of a Chinese character "mu". There are holes for installing the long telescopic rod 5 processed in the middle of the two upper plates of the outer frame 1, and there is a hole for installing the short telescopic rod 6 processed in the middle of the first lower plate. There is a die seat groove processed in the middle of the second plate for installing the drawing die and playing a guiding role for the thin-walled capillary tube at the same time. There are holes for installing the sliding rod 4 processed on both sides of the three lower plates of the outer frame 1.

[0027] The said fixed clamp seat 2, the specific structural form is shown in Figure 3 . It can be processed and reformed from a plate. The whole is in the shape of a cross. The upper end surface is respectively connected to the long telescopic rod 5 and the short telescopic rod 6. There is a groove for installing the fixed clamp 3 processed at the lower end. The fixed clamp 3 is installed on the fixed clamp seat 2 through standard bolts. There are through holes on both sides to facilitate the installation of the fixed clamp seat 2 on the two sliding rods 4.

[0028] The said fixed clamp 3, the specific structural form is shown in Figure 4 . It can be processed and reformed from a plate. There are two long strip-shaped pressing blocks installed in the middle of the fixed clamp 3, and the pressing and contraction of the pressing blocks are controlled through hydraulic transmission.

[0029] The said sliding rod 4 is a standard specification optical axis, and the size specification can be adjusted according to the size of the structure.

[0030] The said long telescopic rod 5 is a standard hydraulic telescopic rod, and the size specification can be adjusted according to the size of the structure.

[0031] The short telescopic rod 6 is a standard hydraulic telescopic rod, and its size specifications can be adjusted according to the size of the structure.

[0032] The support block 7 is a standard I-shaped steel, and its size specifications can be adjusted according to the size of the structure.

[0033] The specific drawing process of this device is as follows: Install the drawing die in the die seat groove of the outer frame 1, pass the thin-walled capillary to be drawn through the drawing die and fix it on the fixing clamp 3 at the upper end of the outer frame 1. Drive the fixing clamp seat 2 and the fixing clamp 3 to move axially along the slide rod 4 through the hydraulic drive of the long telescopic rod 5 of the device, so as to realize the drawing and forming of the thin-walled capillary. The final forming specification of the drawing die used in this device is 1 mm - 5 mm, that is, the outer diameter of the drawn thin-walled capillary is 1 mm - 5 mm. When used in combination with the drawing die and the core die, the maximum drawing treatment can be carried out on a seamless pipe with an outer diameter of 6 mm and a wall thickness of 1 mm. Through the adjustment of the drawing process, a thin-walled capillary with an outer diameter of 0.9 mm and a wall thickness of 0.05 mm is finally prepared.

Claims

1. A frame structure for drawing and forming thin-wall capillary tubes, characterized in that: It is composed of an outer frame made of die steel, a fixed clamp seat, a fixed clamp, a sliding rod, a long telescopic rod, a short telescopic rod, and a support block; among them, the sliding rod is fixed on both sides inside the outer frame; the fixed clamp seat and the fixed clamp are assembled and matched, and are respectively connected to the long telescopic rod and fixed at the upper end of the outer frame, and connected to the short telescopic rod and fixed at the lower end of the outer frame. At the same time, the fixed clamp seat moves axially along the sliding rod; on both sides of the bottom of the outer frame, there are respectively installed and fixed two support blocks, and the support blocks ground the whole device through standard anchor bolts.

2. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The outer frame is assembled by two I-beams on both sides and four middle plates, and the whole is in the shape of a Chinese character "mu". There are holes for installing the long telescopic rod processed in the middle of the two upper plates of the outer frame, and there is a hole for installing the short telescopic rod processed in the middle of the first lower plate. There is a die seat groove processed in the middle of the second lower plate for installing the drawing die, and at the same time, it plays a role in guiding the thin-walled capillary. There are holes for installing the sliding rod processed on both sides of the three lower plates of the outer frame.

3. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The fixed clamp seat is processed and reformed from a plate, and the whole is in the shape of a cross. The upper end surface is respectively connected to the long telescopic rod and the short telescopic rod. There is a groove for installing the fixed clamp processed at the lower end. The fixed clamp is installed on the fixed clamp seat through standard bolts, and there are through holes on both sides to facilitate the installation of the fixed clamp seat on the two sliding rods.

4. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The fixed clamp is processed and reformed from a plate. There are two long strip-shaped pressing blocks installed in the middle of the fixed clamp, and the pressing and contraction of the pressing blocks are controlled through hydraulic transmission.

5. The frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The sliding rod is a standard specification optical axis, and the size specification is adjusted according to the structure size.

6. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The long telescopic rod is a standard hydraulic telescopic rod, and the size specification is adjusted according to the structure size.

7. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The short telescopic rod is a standard hydraulic telescopic rod, and the size specification is adjusted according to the structure size.

8. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1, characterized in that: The support block is a standard I-beam steel, and the size specification is adjusted according to the structure size.

9. A frame structure for drawing and forming thin-walled capillary tubes according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, characterized in that: Install the thin-walled capillary drawing die at the die seat groove position of the outer frame. Pass the thin-walled capillary to be drawn through the drawing die and fix it on the fixed clamp at the upper end of the outer frame. Drive the long telescopic rod through the equipment hydraulic pressure to drive the fixed clamp seat and the fixed clamp to move axially along the sliding rod to realize the drawing and forming of the thin-walled capillary.

10. A frame structure for drawing and forming thin-walled capillary tubes according to claim 9, characterized in that: For the drawn thin-walled capillary with a core mold, fix the core mold on the fixed clamp at the lower end of the outer frame, fix one end of the thin-walled capillary on the fixed clamp at the upper end of the outer frame, and through the guidance of the die seat groove of the outer frame, finally separate the core mold and the thin-walled capillary of the thin-walled capillary with a core mold to realize the final forming of the thin-walled capillary.

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