Reducing tool structure for thin-wall capillary tube

Abstract

The invention provides a reducing tool structure for a thin-wall capillary tube, the whole reducing tool structure is composed of eight same conical modules, and the conical modules are formed by processing blocky materials; according to the structure and the size of a working space of reducing equipment, the conical module is machined into a fan-shaped structure with an angle of 45 degrees, the diameter of an outer arc of the fan-shaped structure is 83 mm, and the diameter of an inner arc of the fan-shaped structure is 5 mm; a turnup with the height of 6.5 mm is machined at the upper end of the outer arc, the diameter of the outer contour of the turnup is 93 mm, the overall height of the conical module is machined to be 49.5 mm according to the matched limiting requirement of reducing equipment, and the turnup at the upper end of the conical module is used for axial limiting in the installation process. An M8 threaded hole is machined in the center of the fan-shaped outer arc, the depth of the hole is 10 mm, and therefore all modules of the reducing tool structure can be conveniently installed and fixed to equipment through screws. And the eight same conical modules are fixed on the inner wall of the working space of the reducing equipment through eight standard screws after being arrayed circumferentially. The tool structure has the characteristics of high stability, convenience in operation, difficulty in deformation and fracture of the capillary tube and the like.

Description

Technical Field

[0001] The present invention provides a reducing tooling structure for a thin-walled capillary tube, which is suitable for reducing the diameter during the drawing and forming process of the thin-walled capillary tube, so that the thin-walled capillary tube can be easily fixedly installed on the clamping structure of the drawing equipment, and a clampable fixed position is provided for the thin-walled capillary tube drawing process, belonging to the field of aerospace science and technology. Background Art

[0002] The hypersonic strong precooler is the core component of the high Mach number strong precooling engine, and the strong precooler is mainly composed of an array of high-temperature alloy thin-walled capillaries (referred to as "capillaries"). The capillaries vary in size according to the heat exchange requirements, so the capillaries need to be processed into tubes through blanks, and then formed by multiple drawing passes to obtain capillaries of different specifications. In the multi-pass drawing process of the capillary, since the capillary is reduced in diameter through the drawing die, the capillary diameter between passes needs to be larger than the diameter of the sizing belt of the drawing die to achieve the purpose of reducing the diameter. This requires reducing the diameter of one end of the capillary so that the capillary passes through the drawing die and is fixed on the rear-end clamping structure, so that the capillary drawing process proceeds smoothly. Due to the thin wall characteristics of the thin-walled capillary, the conventional method of reducing the diameter is prone to cause the capillary to crack, so the reduction of the capillary between passes has become one of the key points in the capillary forming process.

[0003] According to the requirement of gradual diameter reduction in the capillary drawing process, one end of the capillary needs to be reduced in diameter during each drawing pass to facilitate passing through a die smaller than the capillary diameter. Existing reduction devices are mainly used for reducing the diameter of conventional seamless pipes. Existing devices for reducing the diameter of thin-walled capillaries are prone to cracking of thin-walled capillaries. Currently, there is no structural device for reducing the diameter of the end of a thin-walled capillary. Therefore, it is necessary to design a reduction tooling structure for thin-walled capillaries to ensure that the capillary can smoothly pass through the die to achieve the diameter reduction process, thereby obtaining capillaries of different specifications. At the same time, the device should also have the characteristics of high stability, convenient operation, and the capillary is not easy to deform and break. Currently, no structural device meets this requirement. The present invention provides a reduction tooling structure for thin-walled capillaries to solve the existing problems. Summary of the invention

[0004] (1) Purpose

[0005] In order to ensure that the capillary tube passes through the drawing die smoothly and realize the drawing of capillaries with different diameters in multiple passes, a reducing tooling structure for thin-walled capillaries needs to be designed. The present invention provides a reducing tooling structure for thin-walled capillaries.

[0006] (2) Technical solution

[0007] The present invention discloses a reducing tooling structure for thin-walled capillaries, and its technical solution is as follows:

[0008] Figure 1 This is an assembly drawing of a reducing tooling structure for thin-walled capillaries. The entire set of reducing tooling structure consists of eight identical tapered modules, which are mainly made of block materials and made of 45# die steel. According to the structure and size of the working space of the reducing equipment, the tapered module is processed into a 45-degree fan-shaped structure, with an outer arc diameter of 83mm and an inner arc diameter of 5mm (the inner arc diameter can be adjusted according to the final size of the actual reduction); a 6.5mm high flange is processed at the upper end of the outer arc, and the outer contour diameter of the flange is 93mm. The overall height of the tapered module is processed to 49.5mm according to the matching limit requirements of the reducing equipment. The upper end flange of the tapered module is mainly used for axial limit during installation; an M8 threaded hole is processed at the center of the outer arc of the fan, with a hole depth of 10mm, so that each module of the reducing tooling structure can be installed and fixed on the equipment by screws. The eight identical tapered modules are arranged in a circular array and fixed to the inner wall of the working space of the reducing equipment by 8 standard screws.

[0009] The working process of the reducing tooling structure is as follows: After the reducing tooling structure is installed, Figure 1 In the standby state, the capillary to be reduced is extended from the right end into the center of the reduction tooling structure, and the extension length is determined according to the actual required reduction length. After the equipment is started, the conical modules of the circular array move simultaneously in the axial and radial directions, and finally the capillary to be reduced is hydraulically driven to reduce the diameter to the inner arc size of the conical module; after the reduction is completed, the conical module returns to the standby state in the axial and radial directions.

[0010] (3) Advantages and effects

[0011] The present invention provides a reducing tooling structure for thin-walled capillaries according to the requirements of the inter-pass drawing process in the forming process of the precooler thin-walled capillaries in the strong precooling hypersonic flight power system. The advantages are mainly reflected in: 1. The tooling structure mold adopts a conical design, and the reducing tooling structure is formed by a circular array; 2. The reducing tooling structure adopts hydraulic drive; 3. The tooling structure mold adopts a conical mold clamping limit in the radial direction, and a combination of flanging and bolts in the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0013] See also Figure 1As shown, the present invention is a reducing tooling structure for thin-walled capillaries. The whole set of reducing tooling structure is composed of eight identical conical modules. The conical modules are mainly processed from block materials and made of 45 mold steel. According to the structure and size of the working space of the reducing equipment, the conical module is processed into a fan-shaped structure with a 45-degree angle, the fan-shaped outer arc diameter is 83mm, and the inner arc diameter is 5mm (the inner arc diameter can be adjusted according to the final size of the actual reduction); a 6.5mm high flange is processed at the upper end of the outer arc, and the outer contour diameter of the flange is 93mm. The overall height of the conical module is processed to 49.5mm according to the matching limit requirements of the reducing equipment. The flange at the upper end of the conical module mainly serves as an axial limit during the installation process; an M8 threaded hole is processed at the center of the fan-shaped outer arc, and the hole depth is 10mm, which is convenient for fixing each module of the reducing tooling structure on the equipment by screws. The eight identical conical modules are arranged in a circular array and fixed to the inner wall of the working space of the reducing equipment by 8 standard screws.

[0014] The working process of the reducing tooling structure is as follows: After the reducing tooling structure is installed, Figure 1 In the standby state, the capillary to be reduced is extended from the right end into the center of the reduction tooling structure. The extension length is determined according to the actual required reduction length. After the equipment is started, the cone modules of the circumferential array move simultaneously in the axial and radial directions. Finally, the capillary to be reduced is reduced to the inner arc size of the cone module through hydraulic drive of the equipment. After the reduction is completed, the cone module returns to the standby state in the axial and radial directions. This device can reduce the diameter of thin-walled capillaries with an outer diameter of 10mm and a wall thickness of 0.05mm. One end of the thin-walled capillary is extended into the center of the reducing tooling structure, and the length of the extension does not exceed the height of the tapered module. After the equipment is started, the tapered module moves simultaneously in the axial and radial directions under hydraulic drive to reduce the diameter of the capillary. The final size after reduction is 5mm.

Claims

1. A reducing tooling structure for a thin-walled capillary, characterized in that: The whole set of reducing tooling structure is composed of eight identical conical modules, which are made of block materials. According to the structure and size of the working space of the reducing equipment, the conical module is processed into a fan-shaped structure with a 45-degree angle, and the outer arc diameter of the fan-shaped is 83mm, and the inner arc diameter is 5mm. A 6.5mm high flange is processed at the upper end of the outer arc, and the outer contour diameter of the flange is 93mm. The overall height of the conical module is processed to 49.5mm according to the matching limit requirements of the reducing equipment. The flange at the upper end of the conical module serves as an axial limit during the installation process. An M8 threaded hole with a hole depth of 10mm is processed at the center of the outer arc of the fan-shaped fan, which is convenient for fixing each module of the reducing tooling structure on the equipment by screws. Eight identical conical modules are arranged in a circular array and fixed to the inner wall of the working space of the reducing equipment by 8 standard screws.

2. A reducing tooling structure for a thin-walled capillary according to claim 1, characterized in that: The material of the tapered module is 45 die steel.

3. The reducing tooling structure for thin-walled capillaries according to claim 1, characterized in that: The inner arc diameter can be adjusted according to the final size of the actual reduction.

4. A reducing tooling structure for thin-walled capillaries according to claim 1, 2 or 3, characterized in that: The working process of the reducing tooling structure is as follows: the capillary to be reduced is extended from the right end into the center position of the reducing tooling structure, and the extension length is determined according to the actual required reduction length. After the equipment is started, the conical modules of the circular array move simultaneously in the axial and radial directions, and finally the capillary to be reduced is hydraulically driven by the equipment to reduce the diameter to the inner arc size of the conical module; after the reduction is completed, the conical module returns to the standby state in the axial and radial directions.

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