An improved device for a temperature-controllable cavity for ultra-low temperature processing of spinning

Abstract

The invention discloses an improved device for a cavity with controllable temperature of ultra-low temperature processing for spinning, which belongs to the technical field of spinning equipment and comprises a core mold, a spinning wheel, a power control element, an ultra-low temperature processing cavity and a tail top, wherein an alloy pipe is sleeved on the core mold; when a spinning program is running, the relative spatial position of the ultra-low temperature processing cavity device and the spinning wheel on the same side does not change, and the ultra-low temperature processing cavity device is parallel to the surface of the alloy pipe and maintains a fixed distance; ultra-low temperature processing technology, controllable processing temperature and spinning parameters are adopted to improve the friction state of the spinning area, inhibit the wear of the spinning wheel, and timely dissipate the deformation heat generated in the spinning process, thereby greatly improving the forming efficiency and forming quality of the alloy pipe, and at the same time having the advantages of extending the fatigue life of the formed pipe, improving the comprehensive mechanical properties of the formed pipe, and reducing the processing cost.

Description

Technical Field

[0001] The invention relates to the technical field of spinning equipment, and in particular to an improved spinning device for alloy pipe fittings based on ultra-low temperature processing and controllable temperature. Background Art

[0002] Metal spinning technology is a kind of cutting-free processing technology, which can be traced back to the ancient ceramic blank making process in my country, and has the characteristics of small deformation force and saving raw materials. As an advanced technology for metal plastic forming, spinning has become the core processing method for small batches, multi-variety symmetrical and asymmetrical rotating hollow thin-walled parts, and has broad development prospects. At present, spinning technology has been widely used in the fields of metal precision processing technology such as aerospace, military industry, nuclear energy, shipbuilding, and light industrial sectors such as electronics, chemicals, and kitchenware. At the same time, spinning devices are constantly being improved to meet the needs of different fields and departments.

[0003] At present, the increasingly harsh service environment has posed severe challenges to the spinning processing quality of alloy pipe fittings, including high dimensional accuracy, good internal and external surface quality, good mechanical and mechanical properties, etc. However, the current spinning device will release a large amount of fixed deformation heat during the processing, and the generated heat cannot be dissipated in time, which reduces the surface processing quality of the formed pipe fittings and the uneven deformation of the material microstructure, thereby reducing the tensile strength, yield strength and hardness of the spun parts, seriously affecting the fatigue performance and service life of the alloy pipe fittings in the actual service environment. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention discloses an improved device for a cavity with controllable temperature in ultra-low temperature processing for spinning. The device adopts ultra-low temperature processing technology, controllable processing temperature and spinning parameters to improve the friction state of the spinning area, inhibit the wear of the spinning wheel, and timely dissipate the deformation heat generated during the spinning process, thereby greatly improving the forming efficiency and forming quality of alloy pipe fittings. At the same time, the device has the advantages of extending the fatigue life of the formed pipe fittings, improving the comprehensive mechanical properties of the formed pipe fittings, and reducing the processing cost.

[0005] The present invention is achieved in that:

[0006] An improved device for a cavity with controllable temperature for ultra-low temperature processing for spinning, characterized in that the device comprises a core mold, and the contour and outer diameter of the core mold are the same as the inner contour and inner diameter of the alloy pipe to be prepared. The outer side of the core mold is covered with an alloy pipe, and a tail top is set at the end of the alloy pipe; an ultra-low temperature processing cavity is set on the periphery of the alloy pipe; the surface spinning temperature is quickly cooled by liquid nitrogen vaporization in the ultra-low temperature processing cavity to reach an ultra-low temperature environment of -100 ℃~-200 ℃; a rotating wheel is also set on the periphery of the alloy pipe, and the rotating wheel feed direction, that is, the area with an axial width of 50-100mm in front of the rotating wheel relative to the moving direction of the alloy pipe is the cooling processing area, and the rotating wheel is spaced from the ultra-low temperature processing cavity; the rotating wheel is connected to the corresponding rotating wheel base; the rotating wheel base is fixed on the tool holder disc; when the spinning program is running, the relative spatial position of the ultra-low temperature processing cavity device with the rotating wheel on the same side does not change, and it is parallel to the surface of the alloy pipe and maintains a fixed distance. The length of the core mold in the present invention is the sum of the length of the alloy pipe, the clearance length of the rotating wheel, and the installation margin of the core mold.

[0007] A cavity support is installed on the ultra-low temperature processing cavity, and the cavity support is hinged to a magnetic base installed on the tool holder disc.

[0008] Furthermore, one end of the core mold has a plurality of threaded holes evenly distributed in an annular direction, and the alloy pipe is fixed on the core mold by means of alloy pipe fixing bolts.

[0009] Furthermore, there are two rotating wheels, and the two rotating wheels are symmetrically distributed along the outside of the alloy pipe.

[0010] Furthermore, the rotating wheel base is fixed on the tool holder disc via rotating wheel base fixing bolts.

[0011] Furthermore, a liquid nitrogen internal spray nozzle and a temperature sensor are provided in the ultra-low temperature processing cavity; the temperature sensor works in coordination with the power control element and the regulating valve provided outside the ultra-low temperature processing cavity, and the power control element works in coordination with the regulating valve to adjust the processing temperature of the ultra-low temperature processing area during the spinning process, and to control the different spinning processing temperatures of different alloy pipes to meet the surface processing quality requirements. The temperature sensor and the power control element cooperate with each other to monitor the temperature of the ultra-low temperature processing area in the cavity in real time. The liquid nitrogen internal spray nozzle is used to transport liquid nitrogen to the cooling processing area. Ultra-low temperature processing uses liquid nitrogen with a low boiling point and easy to vaporize as a cooling medium. In the application method of the cooling medium, the internal spray cooling technology with the advantages of good cooling effect and small waste is selected for ultra-low temperature processing.

[0012] Furthermore, the cavity support is connected to the magnetic base by a spherical hinge, the magnetic base can rotate, and the magnetic base is installed on the tool holder plate. By changing the installation position of the magnetic base and adjusting the spherical hinge, the position relationship between the ultra-low temperature processing cavity and the surface of the alloy pipe and the rotating wheel is controlled.

[0013] The beneficial effects of the present invention and the prior art are:

[0014] The present invention improves the traditional spinning device and proposes to adopt the method of ultra-low temperature processing area and rotary wheel follow-up operation to realize spinning processing in ultra-low temperature environment, which can effectively improve the friction state of the spinning area, inhibit the wear of the rotary wheel, and timely dissipate the deformation heat generated during the spinning process, thereby significantly improving the processing accuracy, alloy pipe forming efficiency and forming quality, and at the same time has the advantages of extending the fatigue life of the formed pipe, improving the comprehensive mechanical properties of the formed pipe, and reducing the processing cost. Through the mutual cooperation of the temperature sensor and the power control element, the control of different spinning processing temperatures of different alloy pipes is further realized to meet the surface processing quality requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall device structure of an improved device for a cavity with controllable temperature for ultra-low temperature processing for spinning according to the present invention;

[0016] Figure 2 It is an internal schematic diagram of the structure of the improved device for the controllable temperature cavity of the present invention;

[0017] Among them, 1-core mold, 2-alloy pipe fittings, 3-rotor, 4-rotor base, 5-rotor base fixing bolts, 6-power control element, 7-tail top, 8-alloy pipe fixing bolts, 9-cavity bracket, 10-magnetic base, 11-ultra-low temperature processing cavity, 12-cooling processing area, 13-regulating valve, 14-tool holder disc, 15-liquid nitrogen internal spray nozzle, 16-temperature sensor. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by enumerating examples below. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0019] The present invention provides a cavity improvement device for ultra-low temperature processing with controllable temperature for spinning, such as Figure 1~2As shown, the improved spinning device includes a core mold 1, a spinning wheel 3, a power control element 6, an ultra-low temperature processing cavity 11 and a tail top 7. The contour and outer diameter of the core mold 1 are the same as the inner contour and inner diameter of the alloy pipe to be prepared, and the alloy pipe 2 is sleeved on the core mold 1; one end of the core mold 1 is circumferentially provided with evenly distributed threaded holes, and the alloy pipe 2 is sleeved on the core mold 1 for fixing by the alloy pipe fixing bolts 8.

[0020] Two spinning wheels 3 are provided on the spinning wheel base 4 for spinning processing, and the spinning wheel base 4 is fixed on the tool holder disc 14 through the spinning wheel base fixing bolts 5. A liquid nitrogen internal injection nozzle 15 and a temperature sensor 16 are provided in the ultra-low temperature processing cavity 11, and the temperature sensor 16 works in coordination with the power control element 6 and the regulating valve 13; a cavity bracket 9 is installed on the ultra-low temperature processing cavity 11, and the cavity bracket 9 is connected to the magnetic base 10 installed on the tool holder disc 14 by a spherical hinge.

[0021] Example 1

[0022] By means of the spinning device, when processing the nickel-based high-temperature alloy tube, firstly, the alloy tube 2 with a length of 180 mm is placed on the mandrel 1 with a length of 210 mm, and the alloy tube 2 is pressed against the mandrel 1 by the tail top 7, and then the alloy tube 2 is spun by two spinning wheels 3 with a diameter of 150 mm. During the entire spinning process, liquid nitrogen is transported to the cooling processing area 12 through the liquid nitrogen internal spray nozzle 15, and an ultra-low temperature processing environment of -150 ° C is achieved under the action of the regulating valve 13, so that the required nickel-based high-temperature alloy tube with high surface processing quality can be spun out finally.

[0023] Example 2

[0024] The aluminum alloy tube is spun using the spinning improvement device with the same structure as that of Example 1. First, the alloy tube 2 with a length of 150 mm is placed on the mandrel 1 with a length of 200 mm, and the alloy tube 2 is pressed against the mandrel 1 by the tail top 7. Then, the alloy tube 2 is spun by two spinning wheels 3 with a diameter of 140 mm. During the entire spinning process, liquid nitrogen is transported to the cooling processing area 12 through the liquid nitrogen internal spray nozzle 15, and an ultra-low temperature processing environment of -180 ° C is achieved under the action of the regulating valve 13, and finally the required aluminum alloy tube with high surface processing quality is spun. The above spinning improvement device can significantly improve the processing accuracy, alloy tube forming efficiency and forming quality.

[0025] It should be understood that the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An improved device for a temperature-controllable cavity for ultra-low temperature processing of spinning, characterized in that: The device comprises a core mold (1), the contour and outer diameter of the core mold (1) being the same as the inner contour and inner diameter of the alloy pipe to be prepared, the alloy pipe (2) being sleeved on the outer side of the core mold (1), and a tail top (7) being arranged at the end of the alloy pipe (2); The alloy tube (2) is provided with an ultra-low temperature processing cavity (11) on its periphery; the alloy tube (2) is also provided with a roller (3) on its periphery; an area of ​​the roller (3) with a width of 50-100 mm in the axial feed direction is a cooling processing area (12); the roller (3) and the ultra-low temperature processing cavity (11) are arranged at intervals; the roller (3) is connected to a corresponding roller base (4); and the roller base (4) is fixed on a tool holder disc (14); The ultra-low temperature processing chamber (11) is provided with a chamber support (9), and the chamber support (9) is connected to a magnetic base (10) mounted on a tool holder plate (14) by a spherical hinge; The magnetic base (10) is rotatable, and the positional relationship between the ultra-low temperature processing cavity (11), the surface of the alloy pipe (2), and the rotating wheel (3) is controlled by changing the installation position of the magnetic base (10) and adjusting the spherical hinge; When the spinning program is running, the relative spatial position of the ultra-low temperature processing cavity and the spinning wheel on the same side does not change, and it is parallel to the surface of the alloy pipe and maintains a fixed distance; The ultra-low temperature processing cavity is provided with a liquid nitrogen internal spray nozzle and a temperature sensor; the temperature sensor works in coordination with a power control element and a regulating valve arranged outside the ultra-low temperature processing cavity, and the power control element works in coordination with the regulating valve to adjust the processing temperature of the ultra-low temperature processing area during the spinning process, so as to control different spinning processing temperatures of different alloy pipes to meet the surface processing quality requirements; the temperature sensor and the power control element cooperate with each other to monitor the temperature of the ultra-low temperature processing area in the cavity in real time; the liquid nitrogen internal spray nozzle is used to transport liquid nitrogen to the cooling processing area, and ultra-low temperature processing uses liquid nitrogen with a low boiling point and easy to vaporize as a cooling medium, and in the application method of the cooling medium, an internal spray cooling technology with good cooling effect and small waste is selected for ultra-low temperature processing.

2. The temperature controllable cavity improvement device for ultra-low temperature processing for spinning according to claim 1 is characterized in that: One end of the core mold (1) has a plurality of threaded holes evenly distributed in a circumferential direction, and the alloy pipe fitting (2) is fixed on the core mold (1) by means of alloy pipe fitting fixing bolts (8).

3. The temperature controllable cavity improvement device for ultra-low temperature processing for spinning according to claim 1 is characterized in that: The number of the rotating wheels (3) is two, and the two rotating wheels (3) are symmetrically distributed along the outside of the alloy pipe (2).

4. The temperature controllable cavity improvement device for ultra-low temperature processing for spinning according to claim 1 is characterized in that: The rotating wheel base (4) is fixed on the tool holder disc (14) via the rotating wheel base fixing bolts (5).

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