阅读说明：本技术 电池箱体深拉伸工艺 (Deep drawing process for battery box ) 是由 齐伟超 郜云峰 张建勋 于 2019-11-20 设计创作，主要内容包括：本发明涉及电池箱技术领域,尤其涉及电池箱体深拉伸工艺。包括第一序拉伸使用设备气顶杆与进料圆角控制进料速度,盒型件直面的位置进料快,圆角的位置进料慢,在设计拉伸模具时凹模的圆角进料快的位置圆角小加大进料阻力,进料快的位置加大圆角减小进料阻力,拉伸高度为箱体的95%拉伸完毕后控制材料变薄10%侧面不会起皱、开裂；第二序拉伸使用氮气弹簧控制进料速度,并且拖料压住平面对平面约束后二次拉伸,拉伸高度为箱体的100%箱体,拉伸完毕后材料变薄15%侧面和底面不会起皱、开裂；采用上述生产的电池箱具有外观漂亮、无褶皱开裂问题、排除装车造成电包漏水无安全隐患和无返修,减低了生产成本等优点。(The invention relates to the technical field of battery boxes, in particular to a deep drawing process of a battery box body. The method comprises the steps that the feeding speed is controlled by an air ejector rod and a feeding fillet of a first-order stretching device, the feeding speed at the position of a straight surface of a box-shaped part is high, the feeding speed at the position of the fillet is low, the feeding resistance is reduced by the fillet at the position of the fillet where the feeding speed at the fillet of a female die is high when a stretching die is designed, the feeding resistance is reduced by the fillet at the position where the feeding speed is high, and the stretching height is that the side surface of the box body is controlled to be thinned by 10% after 95; in the second-step stretching, a nitrogen spring is used for controlling the feeding speed, the material is dragged to press the plane to be restrained for the second time, the stretching height is 100% of the box body, and the material becomes thin by 15% after stretching, so that the side surface and the bottom surface cannot wrinkle or crack; the battery box produced by the method has the advantages of beautiful appearance, no wrinkle and cracking problem, no potential safety hazard and no repair caused by water leakage of the electric package during loading, reduction of production cost and the like.)

1. The deep drawing process of the battery box body is characterized in that: comprises a forming pneumatic press (1), a shaping pneumatic press (2) and a battery box (3); the shaping press (2) is arranged on one side of the forming press (1); a forming platform (101) is arranged in the middle of the forming press (1); a lower forming die (102) is arranged on the forming platform (101); an upper forming die (103) is arranged above the lower forming die (102) on the forming pneumatic press (1); air ejector rods (104) are arranged on two sides of the lower forming die (102); the middle part of the shaping pneumatic press (2) is provided with a shaping platform (201); a lower shaping die (202) is arranged on the shaping platform (201); an upper shaping die (203) is arranged above the lower shaping die (202) on the shaping pneumatic press (2); when the battery box (3) is manufactured, the steel plate is firstly stretched through the forming pneumatic press (1) and then shaped through the shaping pneumatic press (2).

2. The battery box deep drawing process according to claim 1, characterized in that: and a plurality of nitrogen springs (204) are arranged on the lower shaping die (202).

3. The battery box deep drawing process according to claim 1, characterized in that: a material dragging table (205) is arranged on the upper shaping die (202); the material dragging table (205) can slide up and down along the upper shaping die (202).

4. The battery box deep drawing process according to claim 1, characterized in that: the lower forming die (102) is a concave die; a feeding fillet (105) is arranged above the inner part of the groove; the radius of the feeding round angle (105) is increased by 0.5mm-3 mm.

5. The deep drawing process of the battery box body according to claim 4, characterized in that: when the forming pneumatic press (1) is stretched, the air ejector rods (104) and the feeding fillets (206) control the feeding speed of the steel plate, and the stretching height is 10% of the thickness of the material after 95% of the stretching of the battery box body is finished.

6. The deep drawing process of the battery box body according to claim 2 or 3, characterized in that: when the shaping pneumatic press (2) performs shaping, the nitrogen spring (204) controls the feeding speed, the material dragging table (205) presses the plane to restrain the plane and then performs secondary stretching, the stretching height is 100% of the battery box, and the material is controlled to be thinned by 15% after the stretching is finished.

Technical Field

The invention relates to the technical field of battery boxes, in particular to a deep drawing process of a battery box body.

Background

Disclosure of Invention

The invention aims to solve the technical problems and provides a deep drawing process of a battery box body aiming at the technical defects, wherein a first-order drawing is adopted to use an air ejector rod and a feeding fillet of equipment to control the feeding speed, the feeding speed of the straight surface of a box-shaped part is high, the feeding speed of the fillet is low, the feeding resistance of the fillet of a female die is increased when the feeding speed of the fillet of the female die is high, the feeding resistance is reduced when the feeding speed of the fillet of the female die is high, and the drawing height is controlled to be 10% thinner after 95% of drawing of the box body is finished, so that the side surface of the material is prevented from wrinkling and cracking; in the second-step stretching, a nitrogen spring is used for controlling the feeding speed, the material is dragged to press the plane to be restrained for the second time, the stretching height is 100% of the box body, and the material becomes thin by 15% after stretching, so that the side surface and the bottom surface cannot wrinkle or crack; the battery box produced by the method has the advantages of beautiful appearance, no wrinkle and cracking problem, no potential safety hazard and no repair caused by water leakage of the electric package during loading, reduction of production cost and the like.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: comprises a forming pneumatic press, a shaping pneumatic press and a battery box; the shaping press is arranged on one side of the forming press; a forming platform is arranged in the middle of the forming press; a lower forming die is arranged on the forming platform; an upper forming die is arranged on the forming pneumatic press above the lower forming die; the two sides of the lower forming die are provided with air ejector rods; the middle part of the shaping pneumatic press is provided with a shaping platform; a lower shaping die is arranged on the shaping platform; an upper shaping die is arranged on the shaping pneumatic press above the lower shaping die; when the battery box is manufactured, the steel plate is firstly stretched by a forming pneumatic press and then shaped by a shaping pneumatic press.

Further optimize this technical scheme, lower sizing die on be provided with a plurality of nitrogen gas springs.

Further optimizing the technical scheme, the upper shaping die is provided with a material dragging table; the material dragging table can slide up and down along the upper shaping die.

Further optimizing the technical scheme, the lower forming die is a female die; a feeding fillet is arranged above the inner part of the groove; the feed fillet radius is increased by 0.5mm-3 mm.

The technical scheme is further optimized, when the forming pneumatic press is stretched, the feeding speed of the steel plate is controlled by the air ejector rod and the feeding fillet, and the stretching height is 10% of the thickness of the material after 95% of the stretching of the battery box body is finished.

The technical scheme is further optimized, when the shaping pneumatic press is used for shaping, the nitrogen spring controls the feeding speed, the material dragging table presses the plane to perform secondary stretching after plane constraint, the stretching height is 100% of the battery box, and the material is controlled to be thinned by 15% after the stretching is finished.

Compared with the prior art, the invention has the following advantages:

1. the tensile user equipment gas ejector pin of first preface and feeding fillet control input speed, the position feeding of the straight face of box type spare is fast, and the position feeding at fillet is slow, and the fast position fillet of fillet feeding of die increases the feeding resistance for a short time when the tensile mould of design, and the fast position of feeding increases the fillet and reduces the feeding resistance.

2. During primary stretching, the stretching height is 95% of the box body, and the side face of the material is controlled to be thinned by 10% and cannot wrinkle or crack after the stretching is finished.

3. The tensile nitrogen gas spring control input speed that uses of second preface adopts nitrogen gas spring control feeding for it is more steady accurate when the box body is tensile.

4. And during secondary stretching, the dragging material presses the plane to restrict the plane, and then secondary stretching is carried out, so that the bottom surface of the manufactured battery box is relatively flat.

5. And during secondary stretching, the stretching height is 100% of the box body, and after the stretching is finished, the material becomes thin by 15% and the side surface and the bottom surface cannot wrinkle or crack.

6. The battery box produced by the method has the advantages of beautiful appearance, no wrinkle and cracking problem, no potential safety hazard and no repair caused by water leakage of the electric package during loading, reduction of production cost and the like.

Drawings

Fig. 1 is a schematic view of processing equipment for a battery box deep-drawing process.

Fig. 2 is a schematic structural diagram of a feeding fillet part of a lower forming die in a deep drawing process of a battery box body.

Fig. 3 is a schematic structural diagram of a battery box in a deep drawing process of the battery box.

In the figure: 1. molding a pneumatic press; 101. a forming platform; 102. a lower forming die; 103. an upper forming die; 104. an air ejector rod; 105. feeding round corners; 2. shaping the pneumatic press; 201. a shaping platform; 202. a lower sizing die; 203. an upper sizing die; 204. a nitrogen spring; 205. a material dragging table; 3. a battery box.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.