Solid melting aging furnace for aluminum alloy workpiece

Abstract

The solid melting aging furnace comprises a support, a furnace body and a circulating fan, the furnace body and the circulating fan are arranged on the support, the furnace body comprises a cylindrical furnace wall and a top plate arranged at the top of the furnace wall, a furnace opening is formed in the lower end of the furnace wall, an annular gap is formed between outer shells of the furnace wall, and an electric heating wire is embedded in an inner shell; an inner cavity of the inner shell forms a heating cavity of the furnace body, a material frame is placed in the heating cavity, air distribution holes are formed in the lower portion of the inner shell, an air inlet pipe communicated with the annular space and an air outlet pipe communicated with the heating cavity are arranged on the furnace wall, and an air inlet and an air outlet of the circulating fan are communicated with the air outlet pipe and the air inlet pipe respectively. And gas at the top of the heating cavity enters the heating cavity through the annular space and the gas distribution holes. The circulating fan can send hot air at the top of the heating cavity into the annular space, then the hot air returns into the heating cavity through the air distribution holes and then flows upwards, the air in the heating cavity can form air flow from bottom to top, and therefore the uniformity of the temperature in the heating cavity is improved.

Description

Technical Field

[0001] The utility model relates to a solid solution aging furnace for aluminum alloy workpieces. Background Art

[0002] In order to improve the strength and toughness of aluminum alloy workpieces and improve their corrosion resistance, it is necessary to perform solid solution aging treatment on the aluminum alloy workpieces. When the solid solution aging treatment is performed manually, the aluminum alloy workpieces need to be placed in a solid solution aging furnace for heating at a set temperature. After heating, quenching is performed. In order to make the temperature of each workpiece in the furnace as uniform as possible, a fan is generally set at the top of the furnace to make the air flow in the furnace flow to improve the uniformity of the temperature in the furnace. However, when the fan is used to stir the air flow in the furnace, the air flow in the furnace actually forms a vortex flow, and the air flow circulates only in one plane. In the up and down directions, the flow of the air flow in the furnace is poor. Due to the low density of the high-temperature gas, it flows upward, making the temperature in the furnace generally high at the top and low at the bottom. In addition, due to the obstruction of the aluminum alloy workpiece in the furnace, the unevenness of the temperature in the furnace is further aggravated, affecting the uniformity of heating of the aluminum alloy workpieces, resulting in the expansion of the differences between the workpieces. Utility Model Content

[0003] In order to solve the problem that the fluidity of the airflow in the solid solution aging furnace in the up and down directions is poor, thereby affecting the uniformity of the furnace temperature, the present application proposes a solid solution aging furnace for aluminum alloy workpieces, which includes a bracket, a furnace body and a circulating fan arranged on the bracket, the furnace body includes a cylindrical furnace wall and a top plate arranged on the top of the furnace wall, the lower end of the furnace wall is formed as a furnace mouth, and a furnace door is installed on the furnace mouth, the furnace wall includes an outer shell and an inner shell lined in the outer shell, there is an annular annular gap between the inner shell and the outer shell, an electric heating wire is buried in the inner shell, and the inner shell The inner cavity is formed as the heating cavity of the furnace body, a material frame is placed in the heating cavity, air distribution holes connecting the annular gap and the heating cavity are evenly opened at the lower part of the inner shell, an air inlet pipe and an air outlet pipe are arranged on the furnace wall, wherein the air inlet pipe is located at the lower end of the furnace wall and connected to the annular gap, the air outlet pipe is located at the upper end of the furnace wall and connected to the heating cavity, the air inlet of the circulating fan is connected to the air outlet pipe, and the air outlet of the circulating fan is connected to the air inlet pipe, and the circulating fan can send the gas at the top of the heating cavity into the annular gap and enter the heating cavity through the air distribution holes; a quenching tank is arranged below the furnace mouth. The present application sets an annular gap in the furnace wall, and makes the annular gap connected to the heating chamber through the air holes. When the solid solution aging furnace is working, the circulating fan can send the hot air at the top of the heating chamber into the annular gap, and then return to the heating chamber through the air holes, and then flow upward, so that the gas in the heating chamber can form an airflow from bottom to top, thereby improving the uniformity of the temperature in the heating chamber, and the airflow ejected from the air holes will also impact the gas between the aluminum alloy workpieces, accelerating the gas flow rate between the aluminum alloy workpieces. In the existing equipment, since the fan is set at the top of the heating chamber, due to the obstruction of the aluminum alloy workpiece, the airflow speed between the aluminum alloy workpieces is slow, so that during the heating process, the heating speed of the external aluminum alloy workpiece is faster than that of the internal aluminum alloy workpiece, resulting in different heating speeds of each aluminum alloy workpiece, affecting the uniformity of the internal quality of the aluminum alloy workpiece, and also causing uneven internal quality of a single aluminum alloy workpiece. By using the present application, the above-mentioned unevenness can be effectively reduced, the overall quality of the aluminum alloy workpiece can be improved, and the quality difference between each aluminum alloy workpiece can be reduced.

[0004] Furthermore, in order to collect the hot air at the top of the heating chamber, an annular tube is fixed at the top of the heating chamber, an air inlet is opened at the lower side of the annular tube, and the air outlet pipe is connected to the annular tube. This design can smoothly send the hot air at the top of the heating chamber to the bottom of the heating chamber through the circulating fan, thereby improving the uniformity of the temperature in the furnace.

[0005] Furthermore, in order to prevent the oxygen in the air from oxidizing the surface of the aluminum alloy workpiece and affecting the surface quality of the aluminum alloy workpiece, a protective gas inlet pipe and an exhaust pipe connected to the heating chamber are provided on the furnace body. The protective gas inlet pipe is located at the top of the furnace body, and the exhaust pipe is located at the bottom of the furnace body. The protective gas inlet pipe is used to introduce protective gas into the heating chamber, and the exhaust pipe is used to discharge the gas in the heating chamber when the protective gas is introduced.

[0006] Furthermore, in order to facilitate the lifting and lowering of the material frame, the material frame has been sent into the heating chamber or the material frame is sent from the heating chamber to the quenching tank, and a winch is installed on the top plate. The lifting wire rope of the winch passes downward through the top plate and is detachably connected to the material frame.

[0007] Furthermore, in order to facilitate closing the furnace door on the furnace opening or withdrawing the furnace door from the furnace opening, the furnace body is supported on the bracket via a column, and an adjustment space for opening the furnace door is provided between the furnace body and the bracket. A slide rail and a traction piston cylinder are fixedly installed on the bracket, and a bracket is movably installed on the slide rail. The furnace door is supported on the bracket via a lifting piston cylinder, and the piston rod of the traction piston cylinder is fixedly connected to the bracket. Driven by the traction piston cylinder, the bracket can drive the furnace door to leave from or return to the bottom of the furnace opening. The lifting piston cylinder is used to close the furnace door in the furnace opening or withdraw the furnace door downward from the furnace opening. Specifically, the traction piston cylinder adopts an electric cylinder, and the lifting piston cylinder adopts a gas cylinder. The cylinder barrel of the lifting piston cylinder is fixed on the bracket, and the piston rod of the lifting piston cylinder extends upward and is fixed on the lower surface of the furnace door.

[0008] Since the material frame needs to be lowered through the furnace mouth into the quenching tank to quench the aluminum alloy workpiece in the material frame, the furnace door needs to be withdrawn from directly below the furnace mouth to avoid interference with the lower part of the material frame. The traction piston cylinder can quickly and conveniently withdraw the furnace door from directly below the furnace mouth or send it to directly below the furnace mouth, while the lifting piston cylinder can quickly and conveniently open and close the furnace door to the furnace mouth.

[0009] Furthermore, in order to facilitate the movement of the quenching tank, a guide rail is installed below the furnace body, and the quenching tank is movably installed on the guide rail via rollers, so that the quenching tank can reciprocate along the guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0011] See also Figure 1 A solid solution aging furnace for aluminum alloy workpieces, comprising a support 10, a furnace body 30 and a circulating fan 54 arranged on the support 10, the support 10 specifically comprising a support leg 11 and a crossbeam 12 installed on the top of the support leg, a column 15 is arranged on the crossbeam, and in this embodiment, the furnace body 30 is fixed on the top of the column. The furnace body 30 comprises a cylindrical furnace wall and a top plate 35 arranged on the top of the furnace wall, the lower end of the furnace wall is formed as a furnace mouth 36, and a furnace door 37 is installed on the furnace mouth 36. The furnace wall comprises an outer shell 31 and an inner shell 32 lined in the outer shell, an annular annular gap 34 is provided between the inner shell and the outer shell, an electric heating wire 321 is buried in the inner shell, the inner cavity of the inner shell is formed as a heating cavity of the furnace body, and a material frame 33 is placed in the heating cavity. Air distribution holes 322 connecting the annular gap 34 and the heating cavity are evenly opened at the lower part of the inner shell 32.

[0012] An annular tube 53 is fixed on the top of the heating chamber, and the annular tube is fixed on the top plate 35 via a hanger 531, and an air inlet is opened on the lower side of the annular tube. An air inlet pipe 56 and an air outlet pipe 55 are arranged on the furnace wall, wherein the air inlet pipe 56 is located at the lower end of the furnace wall and connected to the annular gap 34, and the air outlet pipe 55 is located at the upper end of the furnace wall and connected to the annular tube, so that the air outlet pipe passes through the heating chamber through the annular tube. The air inlet of the circulating fan 54 is connected to the air outlet pipe 55, and the air outlet of the circulating fan 54 is connected to the air inlet pipe 56. The circulating fan can send the gas at the top of the heating chamber into the annular gap and enter the heating chamber through the air distribution holes.

[0013] In order to prevent the surface of the aluminum alloy workpiece from being oxidized due to the presence of oxygen in the air when the aluminum alloy workpiece is heated, thereby affecting the surface quality of the aluminum alloy workpiece, in this embodiment, a protective gas inlet pipe 51 and an exhaust pipe 57 connected to the heating chamber are provided on the furnace body. The protective gas inlet pipe is located at the top of the furnace body, and the exhaust pipe is located at the bottom of the furnace body. An inlet valve 52 is installed on the protective gas inlet pipe 51, and an exhaust valve 58 is installed on the exhaust pipe 57. When heating the aluminum alloy workpiece, the protective gas can specifically be CO2 or a mixture of CO2 and SF6. The protective gas inlet pipe is used to pass the protective gas into the heating chamber, and the exhaust pipe is used to discharge the gas in the heating chamber when the protective gas is passed. When the protective gas is passed into the heating chamber through the protective gas inlet pipe, the air in the heating chamber is discharged through the exhaust pipe. After the addition of the protective gas is completed, the inlet valve 52 and the exhaust valve 58 are closed.

[0014] A winch 40 is installed on the upper surface of the top plate 35. The winch 40 specifically includes a driving motor 41, a winch 42 connected to the output shaft of the driving motor, and a lifting wire rope 44 wound on the winch. The two ends of the winch 42 are rotatably installed on the top plate through a bearing seat 43. The lifting wire rope extends the lifting hole 351 on the top plate into the heating chamber, and a hook 45 is installed at the end of the lifting wire rope located in the heating chamber. In this embodiment, the lifting wire rope specifically adopts a sealed wire rope, and an asbestos packing is arranged in the lifting hole as a sealing member. Four transition wire ropes 38 are installed on the top of the material frame, and each transition wire rope 38 is connected to a rotating shaft 381 installed on the top of the material frame through a connector 382. The four transition wire ropes are all hooked on the hook, so that the lifting wire rope can lift the material frame 33.

[0015] There is an adjustment space 25 for opening the furnace door between the furnace body 30 and the bracket 10, two mutually parallel slide rails 14 and a traction piston cylinder 20 are fixedly mounted on the bracket, a bracket 26 is movably mounted on the slide rails, and the furnace door 37 is supported on the bracket via the lifting piston cylinder 27. In this embodiment, the traction piston cylinder 20 adopts an electric cylinder, the first cylinder barrel 21 of the traction piston cylinder is fixed on the crossbeam 12, and the end of the first piston rod 22 of the traction piston cylinder 20 is fixed on the bracket 26. Driven by the traction piston cylinder, the bracket can drive the furnace door to leave from or return to the bottom of the furnace mouth. The lifting piston cylinder 27 is specifically an air cylinder, the second cylinder barrel of which is fixedly mounted on the bracket 26, the second piston rod of which extends upward and is connected to the lower surface of the furnace door 37, the lifting piston cylinder is used to close the furnace door in the furnace mouth or to withdraw the furnace door downward from the furnace mouth, and a sealing ring is installed on the outer peripheral surface of the upper end of the furnace door. In the accompanying drawings, the sealing ring is not shown and can be set according to the prior art.

[0016] A guide rail 13 is installed below the furnace body, and a roller 161 is installed at the bottom of the quenching tank 16. The roller is supported on the guide rail so that the quenching tank 16 is movably installed on the guide rail via the roller, so that the quenching tank can reciprocate along the guide rail. After the furnace door is evacuated from the furnace mouth, the traction piston cylinder 20 is used to drag the furnace door away from the bottom of the furnace mouth, and then the winch 40 is started to put the material frame 33 downward into the quenching tank 16 for quenching. After the transition steel wire rope is removed from the hook, the quenching tank 16 can be dragged away from the bottom of the furnace mouth, and then another material frame 33 with aluminum alloy workpieces is hooked on the hook, and then the winch 40 is started to lift the material frame into the heating chamber, and the traction piston cylinder 20 is started to push the furnace door to the bottom of the furnace mouth, and the furnace door is sealed and installed at the furnace mouth by the lifting piston cylinder, and then protective gas is introduced into the heating chamber. After the protective gas is filled, the furnace is heated and the circulating fan is started to circulate the gas in the furnace, so that the gas at the top of the furnace enters the annular gap, and then enters the heating chamber through the air distribution holes to improve the uniformity of the gas temperature in the furnace, and at the same time, the gas between the workpieces can be fully circulated to improve the uniformity of heating of the aluminum alloy.

Claims

1. A solution aging furnace for aluminum alloy workpieces, characterized in that: The utility model comprises a bracket, a furnace body and a circulation fan arranged on the bracket, the furnace body comprises a cylindrical furnace wall and a top plate arranged on the top of the furnace wall, the lower end of the furnace wall is formed as a furnace mouth, and a furnace door is installed on the furnace mouth, the furnace wall comprises an outer shell and an inner shell lined in the outer shell, an annular annular gap is provided between the inner shell and the outer shell, an electric heating wire is buried in the inner shell, the inner cavity of the inner shell forms a heating cavity of the furnace body, a material frame is placed in the heating cavity, air distribution holes connecting the annular gap and the heating cavity are evenly opened at the lower part of the inner shell, an air inlet pipe and an air outlet pipe are arranged on the furnace wall, wherein the air inlet pipe is located at the lower end of the furnace wall and connected to the annular gap, the air outlet pipe is located at the upper end of the furnace wall and connected to the heating cavity, the air inlet of the circulation fan is connected to the air outlet pipe, the air outlet of the circulation fan is connected to the air inlet pipe, the circulation fan can send the gas at the top of the heating cavity into the annular gap, and enter the heating cavity through the air distribution holes; a quenching tank is arranged below the furnace mouth.

2. The solution aging furnace according to claim 1, characterized in that: An annular tube is fixed on the top of the heating chamber, an air inlet is opened on the lower side of the annular tube, and an air outlet pipe is connected with the annular tube.

3. The solution aging furnace according to claim 1, characterized in that: A protective gas inlet pipe and an exhaust pipe connected to the heating chamber are arranged on the furnace body. The protective gas inlet pipe is located at the top of the furnace body, and the exhaust pipe is located at the bottom of the furnace body. The protective gas inlet pipe is used to introduce protective gas into the heating chamber, and the exhaust pipe is used to discharge the gas in the heating chamber when the protective gas is introduced.

4. The solution aging furnace according to claim 1, characterized in that: A winch is installed on the top plate, and a lifting wire rope of the winch passes downward through the top plate and is detachably connected to the material frame.

5. The solution aging furnace according to claim 1, characterized in that: The furnace body is supported on the bracket via columns, and an adjustment space for opening the furnace door is provided between the furnace body and the bracket. A slide rail and a traction piston cylinder are fixedly installed on the bracket, and a bracket is movably installed on the slide rail. The furnace door is supported on the bracket via a lifting piston cylinder, and the piston rod of the traction piston cylinder is fixedly connected to the bracket. Driven by the traction piston cylinder, the bracket can drive the furnace door to leave from or return to the bottom of the furnace mouth, and the lifting piston cylinder is used to close the furnace door in the furnace mouth or to evacuate the furnace door downward from the furnace mouth.

6. The solution aging furnace according to claim 5, characterized in that: The traction piston cylinder adopts an electric cylinder, and the lifting piston cylinder adopts a gas cylinder. The cylinder barrel of the lifting piston cylinder is fixed on the bracket, and the piston rod of the lifting piston cylinder extends upward and is fixed on the lower surface of the furnace door.

7. The solution aging furnace according to claim 1, characterized in that: A guide rail is installed below the furnace body, and the quenching tank is movably installed on the guide rail via rollers, so that the quenching tank can reciprocate along the guide rail.

Images