A support frame for an automotive thermoforming heating furnace

Abstract

The present invention discloses a support frame for an automotive hot forming heating furnace, which is used to place inside the heating furnace to support the hot forming sheet metal of aluminum. It includes square steel and a support plate. Several vertical plates are vertically arranged between the two. The vertical plates are U-shaped as a whole, including two tops and a bottom. The two tops are respectively connected to the lower surface of the same-side support plate through a backing plate, and the bottom is connected to the square steel; on the side facing the furnace door of the heating furnace below the two tops of the vertical plate, a lifting component is respectively provided. The lifting component includes a screw and a nut. The outer wall of the nut is horizontally fixed on the side wall of the vertical plate. The nut of the screw is located below and is used to contact the inner wall of the heating furnace, and the other end passes through the nut and is in threaded cooperation with the nut; the outer wall of the square steel is coated with a heat insulation cotton layer, and a positioning pin hole is provided at the bottom. The present invention can well support the sheet metal in cold and hot states, solve the problem of the sheet metal sagging and deforming when the aluminum of the automobile is hot formed, and can adapt to the production of parts with various external dimensions and sheet metal with holes, achieving the effect of stable production and reducing the rejection rate.

Description

Technical Field

[0001] The invention relates to a support frame, in particular to a support frame used in an automobile aluminum hot forming heating furnace. Background Art

[0002] As the world's automobile industry pays more and more attention to energy conservation and environmental protection, automobile lightweighting has become an important means and direction for major automobile companies to improve their competitiveness. With the proposal of lightweighting, the research and application of some lightweight materials have also become a hot topic in recent years. Among them, aluminum alloy has a series of excellent characteristics, such as low density, high specific strength and specific stiffness, good impact resistance, corrosion resistance, easy surface coloring and high recycling and regeneration, making it an ideal material for automobile lightweighting. Compared with other lightweight materials, aluminum alloy is used in larger quantities.

[0003] In the automobile structure, the body in white accounts for about 30% of the total weight of the automobile. The use of aluminum alloy covers can reduce the weight of the whole vehicle by 10%-15%, and the weight reduction effect is very significant. At the same time, the good shock absorption performance of aluminum alloy can improve the safety during collision. Due to the decrease in the quality of the body, the kinetic energy generated during the collision will also be reduced, and the impact force will also be reduced accordingly. Therefore, aluminum alloy sheets for automobile covers have a good application foundation and market prospects in the lightweight of automobiles. However, cold forming is not possible for particularly sharp inner bends and parts with particularly deep forming depths. In addition, the product rebounds greatly after cold forming of aluminum sheets, and the rebound area is unstable, which makes the later rectification particularly difficult, the cycle is particularly long, and the cost is high. In response to these problems, aluminum hot forming came into being. The aluminum sheet used in aluminum hot forming has the mechanical properties and stamping forming properties of deep-drawn steel sheets, and its stamping forming properties are basically close to or in some aspects exceed those of steel sheets.

[0004] In actual production, we encounter the following situation: due to the different density and strength of steel and aluminum plates, if the traditional boron steel hot forming heating furnace support frame is used, the aluminum plate will sag and deform when heated, and the amount of sagging will block the path of the automatic entry into the furnace, resulting in the plate being unable to be taken out after heating. Even if it is barely taken out, the plate has been completely deformed and has large corrugated waves, causing the plate to shift from the designed position after entering the mold, resulting in production problems such as surface quality and unstable quality of the product, and even batch scrapping. However, aluminum hot forming is currently in its infancy in China, and there is almost no experience to draw on for production technology. Summary of the invention

[0005] The object of the present invention is to provide a solution to the above problems, which is used for the hot forming of aluminum alloy plates in a heating furnace, can well support the sheet material in both cold and hot states, solve the problem of the sheet material sagging and deforming when heated during the hot forming of automobiles, and can adapt to the production of parts with various external dimensions and perforated sheet materials, achieving the effects of stable production and reducing the scrap rate, and is a support frame for a hot forming heating furnace for automobiles.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A support frame for a hot forming heating furnace for automobiles, which is used to place in the heating furnace to support the hot forming sheet material of aluminum, includes a horizontally arranged square steel.

[0007] On both sides above the square steel, there are respectively provided a long strip-shaped support plate, and the support plates are parallel and symmetrically arranged with the square steel.

[0008] Between the support plate and the square steel, there are vertically provided several vertical plates. The vertical plates are parallel to the width direction of the square steel and are integrally U-shaped, including two tops and a bottom. The two tops are respectively connected to the lower surface of the same-side support plate through a backing plate, and the bottom is connected to the square steel.

[0009] Below the two tops of the vertical plate, there is respectively provided a lifting assembly. The lifting assembly includes a screw and a nut. The outer wall of the nut is horizontally fixed on the side wall of the vertical plate. The nut of the screw is located below for contacting the inner wall of the heating furnace, and the other end passes through the nut and is in threaded cooperation with the nut.

[0010] The outer wall of the square steel is coated with a heat insulation cotton layer, and a positioning pin hole is provided at the bottom.

[0011] Preferably: The vertical plates are evenly distributed, and the lifting assembly is located on the side of the vertical plate facing the furnace door of the heating furnace.

[0012] Preferably: The support plate and the vertical plate are made of stainless steel S321 material.

[0013] The installation and use method of the present invention is as follows:

[0014] The present invention can be used with multiple pieces placed in the heating furnace at the same time. In order to better cooperate with the use of the present invention, an installation groove is provided on the inner bottom surface of the heating furnace. The installation groove is matched and fitted with the shape of the square steel, and a positioning pin is provided in the installation groove, which is matched with the positioning pin hole. In this way, when installing the present invention, place the square steel in the installation groove and the positioning pin in the positioning pin hole to achieve rough positioning.

[0015] Since multiple of the present invention are placed in a heating furnace for carrying multiple sets of automotive hot forming sheet materials, multiple sets of sheet materials need to be maintained at the same height. After rough positioning is achieved through square steel and positioning pins in the present invention, fine positioning still needs to be carried out through a lifting component. At this time, by rotating the screw, its nut contacts the inner wall of the heating furnace, and by adjusting the relative height between the fine adjustment screw and the nut, the vertical plate connected to the nut is driven to achieve fine adjustment in height, so as to ensure that all support plates are at the same horizontal height.

[0016] The overall vertical plate is U-shaped and is consistent with the width direction of the square steel. Therefore, the centers of multiple vertical plates connected to the same square steel are consistent with the center of the square steel. The purpose is to ensure that there is no interference between the front end of the automatic loading and unloading robot and the whole of the present invention, and at the same time ensure that all vertical plates are perpendicular to the bottom plane of the square steel, laying a foundation for the later welding of the backing plate.

[0017] The cooperation between the screw and the nut is used to easily adjust the horizontal height of the top surfaces of multiple sets of the present invention to be the same after they are placed in the heating furnace at the same time. The screw is in direct contact with the inner wall of the heating furnace. When there are differences in the top heights of multiple products of the present invention, we only need to fine-tune by adjusting the depth of the screw screwed into the nut. At the same time, the screw and the nut have a specific supporting effect. After the adjustment is completed, the present invention can well maintain the state we need and will not deflect or displace.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] The present invention can provide a large area of effective support and can be applied to various sheet materials at the same time, especially small strip materials and perforated materials. When the present invention is used for hot forming of aluminum, it can well support the sheet material in cold and hot states, avoiding the position deviation of the sheet material caused by sagging during heating and the deformation of the holes, ensuring the fixed position of the sheet material in the furnace, accurate positioning of the automatic handling of the sheet material into the die, and stable quality during the part production process.

[0020] At the same time, the device of the present invention completely eliminates the risk of pulling and deforming the support frame when the sheet material is automatically taken out, effectively ensuring the internal safety of the heating furnace equipment. Since the heating furnace belongs to the major asset equipment of hot forming parts stamping parts and is a high-investment equipment. If downtime for maintenance occurs, it will cause significant losses to the company. The present invention completely avoids this risk. Brief Description of the Drawings

[0021] Figure 1 It is also a schematic diagram of the structure of the present invention;

[0022] Figure 2 For Figure 1 Top view.

[0023] In the figure: 1, positioning pin; 2, square steel; 3, heat insulation cotton; 4, vertical plate; 5, backing plate; 6, support plate; 7, screw; 8, nut. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Example 1: See Figure 1 and Figure 2 A support frame for an automobile aluminum hot forming heating furnace, which is used to be placed in the heating furnace to support aluminum hot forming sheets, and includes a horizontally arranged square steel 2, and a long strip support plate 6 is respectively arranged on both sides above the square steel 2, and the support plate 6 is parallel to and symmetrically arranged with the square steel 2;

[0026] Several vertical plates 4 are vertically arranged between the support plate 6 and the square steel 2. The vertical plates 4 are parallel to the width direction of the square steel 2 and are U-shaped as a whole, including two tops and a bottom. The two tops are connected to the lower surface of the support plate 6 on the same side through a pad 5, and the bottom is connected to the square steel 2.

[0027] A lifting assembly is provided below the two tops of the vertical plate 4, respectively. The lifting assembly includes a screw 7 and a nut 8. The outer wall of the nut 8 is horizontally fixed to the side wall of the vertical plate 4. The nut of the screw 7 is located below to contact the inner wall of the heating furnace, and the other end passes through the nut 8 and is threadedly matched with the nut 8.

[0028] The outer wall of the square steel 2 is covered with 3 layers of heat insulation cotton, and a positioning pin 1 hole is provided at the bottom.

[0029] In this embodiment: the vertical plates 4 are evenly distributed, the lifting assembly is located on the side of the vertical plates 4 facing the furnace door of the heating furnace, and the support plates 6 and the vertical plates 4 are made of stainless steel S321.

[0030] The vertical plate 4 can be U-shaped or in other shapes, but there must be a U-shaped depression in the middle and the two sides are symmetrical. The center of the vertical plate 4 is consistent with the center of the square steel 2. The center line of multiple vertical plates 4 overlaps with the center of the square steel 2 in the horizontal plane. This can ensure that the front end of the feeding automation robot does not interfere with the support frame.

[0031] When welding the pad 5, it is necessary to ensure that the upper plane of all pads 5 on the same support frame is parallel to the bottom plane of the square steel 2, and it is required that after welding, the upper plane of all pads 5 on the same support frame is at the same height from the bottom plane of the square steel 2 to ensure that the entire bottom surface of the support plate 6 is on the same horizontal plane after welding, thereby ensuring good support and effective contact of the sheet material.

[0032] The heat insulation cotton 3 is wrapped around the outer layer of the square steel 2 to prevent the square steel 2 from directly contacting the installation groove of the heating furnace and affecting the heating efficiency.

[0033] The present invention is used for the thermite forming of sheet materials for automotive body panels, supporting the sheet materials, which can well solve the problem of the sheet materials sagging and deforming due to heat during the automotive thermite forming, and can adapt to the production of parts with various external dimensions and perforated sheet materials, achieving the effect of stable production and reducing the rejection rate.

[0034] After adopting the device of the present invention, the rejection rate is controlled within 2‰. Calculated at the price of thermite forming sheet materials of 30 - 40 yuan / kg, the average cost saved for producing parts per shift is 3,600 yuan, and the loss of raw materials can be reduced by about 850,000 yuan for single-shift production throughout the year. For automotive parts enterprises with mass production, the profit margin and core competitiveness are greatly improved.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A support frame for an automotive thermoforming heating furnace, which is used to place inside the heating furnace to support the thermoforming sheet metal of aluminum, comprising a horizontally arranged square steel (2), characterized in that: On both sides above the square steel (2), there are respectively provided a strip-shaped support plate (6), and the support plate (6) is parallel and symmetrically arranged with the square steel (2); Between the support plate (6) and the square steel (2), several vertical plates (4) are vertically provided. The vertical plates (4) are parallel to the width direction of the square steel (2), and the whole is U-shaped, including two tops and a bottom. The two tops are respectively connected to the lower surface of the same-side support plate (6) through a backing plate (5), and the bottom is connected to the square steel (2); Below the two tops of the vertical plate (4), there is respectively provided a lifting assembly. The lifting assembly includes a screw (7) and a nut (8). The outer wall of the nut (8) is horizontally fixed on the side wall of the vertical plate (4). The nut of the screw (7) is located below for contacting the inner wall of the heating furnace, and the other end passes through the nut (8) and is in threaded cooperation with the nut (8); The outer wall of the square steel (2) is coated with a layer of heat insulation cotton (3), and there is a positioning pin (1) hole at the bottom.

2. The support frame for an automotive hot forming heating furnace according to claim 1, wherein: The vertical plates (4) are evenly distributed, and the lifting assembly is located on the side of the vertical plate (4) facing the furnace door of the heating furnace.

3. The support frame for an automotive thermoforming heating furnace according to claim 1, characterized in that: The support plate (6) and the vertical plate (4) are made of stainless steel S321 material.

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