Workpiece automatic conveying device for gas heating of blanks

Abstract

The utility model discloses a kind of workpiece automatic transmission devices for blank gas heating, more specifically in the technical field of transmission device, including conveyer, for transmission high-temperature blank after gas heating;Heat shield is fixed outside the conveyer, gas conveying assembly is fixed in the heat shield inner wall, gas conveying assembly is used to spray inert gas from the top and side of blank to it;The conveyer includes rack and multiple rollers arranged on the rack, the roller is hollow inside, and multiple air injection holes are formed in the outer wall of each roller, to facilitate the inert gas from the bottom of blank to spray on it, for the heat preservation of high-temperature blank.The utility model effectively reduces the heat loss of blank, to realize the heat preservation of high-temperature blank, and further guarantee the production quality of blank.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, specifically to an automatic workpiece transmission device for gas heating of billets. Background Technology

[0002] In the automotive manufacturing industry, the hot forming process of high-strength steel billets is an important technical means to achieve lightweight vehicle bodies and improve collision safety. The core process is as follows: the automotive billet is first heated to the austenitizing temperature range in a gas-fired furnace, which completely softens the billet material and gives it good plasticity. Then, it is quickly transferred to a special hot forming mold by an automatic conveyor or other automatic transfer device. The part is shaped by the mold stamping. Then, the billet is cooled to promote the transformation of the billet microstructure from austenite to high-strength martensite, and finally obtains a high-tensile-strength formed part.

[0003] Currently, when high-temperature blanks are output from the gas-fired heating furnace, the existing transmission device lacks an effective heat preservation structure. During transmission, the surface temperature of the blank is easily lost, resulting in the blank temperature being lower than the lower limit of the martensitic phase transformation critical temperature when it enters the mold. This affects the completion of the austenite-to-martensite transformation of the blank structure, ultimately affecting the tensile strength of the formed parts. Consequently, it fails to meet the collision safety requirements of key automotive body components, resulting in low production quality. Utility Model Content

[0004] The purpose of this invention is to provide an automatic workpiece transfer device for gas heating of billets, which effectively reduces heat loss from the billets, thereby achieving heat preservation of high-temperature billets and ensuring the production quality of the billets.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic workpiece conveying device for gas-heated billets, comprising a conveyor for conveying high-temperature billets heated by gas; an insulating outer cover is fixed to the outside of the conveyor, and a gas conveying assembly is fixed to the inner wall of the insulating outer cover, the gas conveying assembly being used to spray inert gas onto the billet from above and to the side; the conveyor includes a frame and multiple rollers mounted on the frame, the rollers being hollow inside, and each roller having multiple air jet holes on its outer wall to facilitate spraying inert gas onto the billet from the bottom, thereby creating an inert gas atmosphere around the billet, reducing the amount of air around the billet by using inert gas with poor thermal conductivity, reducing heat loss from the billet, and achieving heat preservation of the high-temperature billet.

[0006] Preferably, one end of the roller is fixed with a rotating shaft, and the rotating shaft is rotatably connected to one side of the frame. The other end of the roller is fixed with a hollow rotating shaft, and the hollow rotating shaft is rotatably connected to the other side of the frame. Multiple rollers are driven to rotate by a drive structure mounted on the frame for transporting high-temperature blanks.

[0007] Preferably, a gas collection box is fixed on the other side of the frame, and multiple hollow rotating shafts extend into the interior of the gas collection box, and the multiple hollow rotating shafts are rotatably connected to the gas collection box, so that the inert gas in the gas collection box can enter multiple rollers.

[0008] Preferably, the gas delivery assembly includes a U-shaped box fixed inside the heat insulation cover. The top of the U-shaped box is fixed to the top of the inside of the heat insulation cover, and the two sides of the U-shaped box are respectively fixed to the two side walls inside the heat insulation cover. The U-shaped box is located above the conveyor, and multiple spray holes are opened on the inner side of the U-shaped box.

[0009] Preferably, a connecting pipe is fixed on one side of the heat insulation cover, and both ends of the connecting pipe pass through the heat insulation cover and are fixed to the U-shaped box and the gas collection box respectively. The interior of the U-shaped box and the interior of the gas collection box are interconnected through the connecting pipe. An air pipe is fixed to the outside of the connecting pipe, and the air pipe is connected to an inert gas delivery pipe to facilitate the delivery of inert gas into the U-shaped box and the gas collection box.

[0010] Preferably, the heat insulation cover has an inlet and an outlet at both ends, and an air curtain assembly is fixed at both ends of the heat insulation cover. The air curtain assembly includes two hollow plates, which are respectively located on the front and rear sides of the conveyor. Multiple through holes are opened on the side of the two hollow plates that are close to each other, and a pipe is fixed on the side of the two hollow plates that are far apart. The pipe is used to connect to the air pump.

[0011] Preferably, the connecting pipes of the two hollow plates are connected to two air pumps respectively, so that inert gas is sprayed out through the through hole of one hollow plate and inert gas is absorbed through the through hole of the other hollow plate. In this way, an air curtain is formed at both the inlet and outlet of the heat insulation cover, which effectively prevents outside air from entering the inside of the cover and also prevents the inert gas inside the cover from escaping outward. This helps to reduce heat loss from the blank and ensure the production quality of the blank.

[0012] Preferably, a support frame is fixed at the bottom of the heat insulation cover to support the heat insulation cover.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. When the conveyor transports the high-temperature billet heated by gas, inert gas is conveyed into the U-shaped box and the gas collection box. The gas collection box sprays inert gas from the bottom of the billet upwards, and the U-shaped box sprays inert gas from the top and sides of the billet upwards, thereby creating an inert gas atmosphere around the billet. On the one hand, the heat insulation cover covering the billet effectively reduces heat loss from the billet. On the other hand, the inert gas with poor thermal conductivity reduces the amount of air around the billet, further reducing heat loss from the billet. This is beneficial for heat preservation of the high-temperature billet and effectively reduces the oxide scale generated by the high-temperature billet coming into contact with oxygen, thereby ensuring the production quality of the billet.

[0015] 2. This utility model forms air curtains at both the inlet and outlet of the heat insulation cover through the air curtain component, which effectively prevents outside air from entering the inside of the cover and also effectively prevents the inert gas inside the cover from escaping outward, further reducing heat loss from the blank and ensuring the production quality of the blank. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the conveyor, heat insulation cover, gas conveying assembly, and air curtain assembly of this utility model;

[0018] Figure 3 This is a structural diagram of the conveyor of this utility model;

[0019] Figure 4 This is a top view of the present invention;

[0020] Figure 5 for Figure 4 Sectional view along axis AA;

[0021] Figure 6 for Figure 4 BB-direction sectional view.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Conveyor; 11. Frame; 12. Roller; 13. Jet nozzle; 14. Hollow shaft; 15. Gas collection box;

[0024] 2. Heat-insulating outer cover;

[0025] 3. Gas delivery assembly, 31. U-shaped box, 32. Nozzle;

[0026] 4. Air curtain assembly; 41. Hollow plate; 42. Through hole; 43. Connecting pipe;

[0027] 5. Connecting pipe, 6. Air pipe, 7. Support frame. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model provides, for example Figures 1-6The illustrated automatic workpiece transfer device for gas-heated billet includes a conveyor 1 for transferring high-temperature billets heated by gas. Specifically, the conveyor 1 includes a frame 11 and multiple rollers 12 mounted on the frame 11. Each roller 12 is hollow inside. One end of each roller 12 is fixed with a rotating shaft, which is rotatably connected to one side of the frame 11. The other end of each roller 12 is fixed with a hollow rotating shaft 14, which is rotatably connected to the other side of the frame 11. The multiple rollers 12 are driven to rotate by a drive structure mounted on the frame 11 for transferring the high-temperature billets. The drive structure can be the drive structure on an existing conveyor, which will not be further described here.

[0030] A gas collection box 15 is fixed on the other side of the frame 11. Multiple hollow rotating shafts 14 extend into the gas collection box 15, and multiple hollow rotating shafts 14 are rotatably connected to the gas collection box 15 through sealed bearings. Multiple air jet holes 13 are opened on the outer wall of each roller 12.

[0031] Next, a heat insulation cover 2 is fixed to the outside of the conveyor 1. A support frame 7 is fixed to the bottom of the heat insulation cover 2 to support the heat insulation cover 2. The heat insulation cover 2 has an inlet and an outlet at both ends. A gas delivery assembly 3 is fixed to the inner wall of the heat insulation cover 2. Specifically, the gas delivery assembly 3 includes a U-shaped box 31 fixed inside the heat insulation cover 2. The top of the U-shaped box 31 is fixed to the top inside the heat insulation cover 2. The two sides of the U-shaped box 31 are fixed to the two inner side walls of the heat insulation cover 2, and the U-shaped box 31 is located above the conveyor 1. Multiple nozzles 32 are opened on the inner side of the U-shaped box 31.

[0032] A connecting pipe 5 is fixed on one side of the heat insulation cover 2. The two ends of the connecting pipe 5 pass through the heat insulation cover 2 and are fixed to the U-shaped box 31 and the gas collection box 15 respectively. The interior of the U-shaped box 31 and the interior of the gas collection box 15 are connected to each other through the connecting pipe 5. An air pipe 6 is fixed to the outside of the connecting pipe 5.

[0033] The high-temperature billet heated by gas is placed on conveyor 1 and transported by rotating drum 12. During the transport, gas pipe 6 is connected to inert gas delivery pipe, and inert gas is delivered into the spherical box 31 and gas collection box 15 through gas pipe 6 and connecting pipe 5. The inert gas in gas collection box 15 enters drum 12 along hollow rotating shaft 14 and is then sprayed upward onto the billet by drum 12. At the same time, the inert gas in spherical box 31 is sprayed onto the billet through nozzle 32, thereby forming an inert gas atmosphere around the billet. On the one hand, the heat insulation cover 2 covering the billet effectively reduces the heat loss of the billet. On the other hand, the air around the billet is reduced by the inert gas with poor thermal conductivity, further reducing the heat loss of the billet. This is beneficial for heat preservation of the high-temperature billet and can effectively reduce the oxide scale generated by the high-temperature billet in contact with oxygen, thereby ensuring the production quality of the billet.

[0034] Furthermore, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, air curtain components 4 are fixed at both ends of the heat insulation cover 2. The air curtain components 4 include two hollow plates 41, which are respectively located on the front and rear sides of the conveyor 1. Multiple through holes 42 are opened on the side of the two hollow plates 41 that are close to each other, and pipes 43 are fixed on the side of the two hollow plates 41 that are far apart from each other.

[0035] The connecting pipes 43 of the two hollow plates 41 are respectively connected to two air pumps. The connecting pipe 43 of one hollow plate 41 is connected to the air outlet of the air pump, so that the air pump delivers inert gas into the hollow plate 41, and then the inert gas is ejected through the through hole 42 of the hollow plate 41.

[0036] Another hollow plate 41 has its connecting pipe 43 connected to the air inlet of an air pump, allowing the air pump to draw air into the hollow plate 41. Then, the through hole 42 of the hollow plate 41 absorbs the inert gas, thus enabling one hollow plate 41 to spray out inert gas and the other hollow plate 41 to absorb inert gas. This forms an air curtain at both the inlet and outlet of the heat insulation cover 2, effectively preventing outside air from entering the interior of the cover 2 and also preventing the inert gas inside the cover 2 from escaping outward, further reducing heat loss from the blank and ensuring the production quality of the blank.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic workpiece conveying device for gas-fired heating of billets, characterized in that: Includes a conveyor (1) for transporting high-temperature blanks heated by gas; The conveyor (1) is fixed with a heat insulation cover (2) on the outside, and a gas conveying assembly (3) is fixed on the inner wall of the heat insulation cover (2). The gas conveying assembly (3) is used to spray inert gas onto the blank from above and side. The conveyor (1) includes a frame (11) and multiple rollers (12) mounted on the frame (11). The rollers (12) are hollow inside, and each roller (12) has multiple air jet holes (13) on its outer wall to facilitate spraying inert gas from the bottom of the blank to keep the high-temperature blank warm.

2. The automatic workpiece conveying device for gas heating of billets according to claim 1, characterized in that: One end of the roller (12) is fixed with a rotating shaft, and the rotating shaft is rotatably connected to one side of the frame (11). The other end of the roller (12) is fixed with a hollow rotating shaft (14), and the hollow rotating shaft (14) is rotatably connected to the other side of the frame (11). Multiple rollers (12) are driven to rotate by a drive structure installed on the frame (11) for transporting high-temperature blanks.

3. The automatic workpiece conveying device for gas heating of billets according to claim 2, characterized in that: A gas collection box (15) is fixed on the other side of the frame (11), and multiple hollow rotating shafts (14) extend into the gas collection box (15) and are rotatably connected to the gas collection box (15).

4. The automatic workpiece conveying device for gas heating of billets according to claim 3, characterized in that: The gas delivery assembly (3) includes a U-shaped box (31) fixed inside the heat insulation cover (2). The top of the U-shaped box (31) is fixed to the top inside the heat insulation cover (2). The two sides of the U-shaped box (31) are respectively fixed to the two side walls inside the heat insulation cover (2). The U-shaped box (31) is located above the conveyor (1). Multiple spray holes (32) are opened on the inner side of the U-shaped box (31).

5. The automatic workpiece conveying device for gas heating of billets according to claim 4, characterized in that: A connecting pipe (5) is fixed on one side of the heat insulation cover (2). The two ends of the connecting pipe (5) pass through the heat insulation cover (2) and are fixed to the U-shaped box (31) and the gas collection box (15) respectively. The interior of the U-shaped box (31) and the interior of the gas collection box (15) are connected to each other through the connecting pipe (5). The connecting pipe (5) is fixed with an air pipe (6), which is connected to an inert gas delivery pipe to facilitate the delivery of inert gas into the U-shaped box (31) and the gas collection box (15).

6. The automatic workpiece conveying device for gas heating of billets according to claim 1, characterized in that: The heat insulation cover (2) has an inlet and an outlet at both ends, and an air curtain assembly (4) is fixed at both ends of the heat insulation cover (2). The air curtain assembly (4) includes two hollow plates (41), which are respectively located on the front and rear sides of the conveyor (1). Multiple through holes (42) are opened on the side of the two hollow plates (41) that are close to each other, and pipes (43) are fixed on the side of the two hollow plates (41) that are far apart from each other.

7. The automatic workpiece conveying device for gas heating of billets according to claim 6, characterized in that: The pipes (43) of the two hollow plates (41) are connected to two air pumps respectively, so that the through hole (42) of one hollow plate (41) sprays out inert gas and the through hole (42) of the other hollow plate (41) absorbs inert gas, thereby forming an air curtain at both the inlet and outlet of the heat insulation cover (2).

8. The automatic workpiece conveying device for gas heating of billets according to claim 1, characterized in that: The heat insulation cover (2) is fixed with a support frame (7) at the bottom end for supporting the heat insulation cover (2).

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