Cylindrical battery steel shell continuous stretching forming device and forming process

Abstract

The invention relates to the technical field of battery steel shells, in particular to a continuous stretching forming device and process for a cylindrical battery steel shell. A continuous stretching forming device for a cylindrical battery steel shell comprises an installation frame and further comprises a switching mechanism, the switching mechanism comprises hydraulic cylinders, the hydraulic cylinders are symmetrically installed on the installation frame, the outer wall of the telescopic end of each hydraulic cylinder is fixedly sleeved with a fixing ring, the telescopic end of each hydraulic cylinder is fixedly connected with a mold A, and the outer wall of each mold A is slidably sleeved with a mold B; and special-shaped rods are symmetrically arranged on the upper side of the mold A. Through the design of the switching mechanism, when the forming device needs to be switched from a small-diameter battery steel shell to a large-diameter battery steel shell, a fixing ring and a special-shaped rod are matched, so that the mold A and the mold B can synchronously descend downwards, the whole set of mold does not need to be replaced, and when the forming device is switched to produce the large-diameter battery steel shell, the mold A and the mold B can synchronously descend downwards. And the outer mold can automatically descend downwards, so that the working efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery steel shells, and in particular to a cylindrical battery steel shell continuous stretching forming device and a forming process. Background Art

[0002] As a battery shell material, the steel shell has very high strength and can effectively protect important components such as the electrolyte and battery chips inside the battery. During the use and transportation of the battery, it can prevent the battery from accidentally rupturing due to external force impact and other reasons, ensuring the safety and reliability of the battery.

[0003] When the battery steel shell forming equipment in the prior art is in use, it can usually only form and produce battery steel shells of a single diameter. When it is necessary to produce battery steel shells of different diameters, the entire set of forming molds needs to be replaced, and then production can be carried out after debugging, which is time-consuming, labor-intensive and inefficient. When the material thickness of the battery steel shell blank is uneven or contains impurities inside, the battery steel shell blank will respond differently to the tensile force during the stretching process, resulting in uneven tensile force and cracking of the shell. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a cylindrical battery steel shell continuous stretching forming device and forming process.

[0005] The technical implementation scheme of the present invention is: a cylindrical battery steel shell continuous stretching forming device, including a mounting frame and a switching mechanism, the switching mechanism includes a hydraulic cylinder, the hydraulic cylinder is symmetrically installed on the mounting frame, the outer wall fixing sleeve of the telescopic end of the hydraulic cylinder is provided with a fixing ring, the telescopic end of the hydraulic cylinder is fixedly connected to a mold A, the outer wall sliding sleeve of the mold A is provided with a mold B, the upper side of the mold A is symmetrically provided with a special-shaped rod, the outer wall sliding sleeve of the special-shaped rod is provided with a special-shaped frame, the special-shaped frame is fixed to the top of the mold B, an elastic member A is provided between the special-shaped rod and the special-shaped frame, the top of the mold B is symmetrically provided with a slide groove, the bottom end of the special-shaped rod is stuck in the slide groove and slides therein, and also includes a limiting mechanism, the upper side of the mold A is provided with a limiting mechanism, the mounting frame is symmetrically provided with an outer mold, and the inner wall of the outer mold is slidably connected with an inner mold.

[0006] Furthermore, the limiting mechanism includes a fixing frame, the fixing frame is symmetrically fixed to the front side of the mounting frame, a U-shaped frame is slidably connected inside the fixing frame, a wedge block used in conjunction with the U-shaped frame is fixed to one side of the special-shaped rod, the elastic wedge-shaped rod is slidably connected inside the special-shaped frame, and a wedge-shaped groove used in conjunction with the elastic wedge-shaped rod is provided on the top of the special-shaped rod.

[0007] Furthermore, the limiting mechanism also includes a Y-shaped rod, the Y-shaped rod is slidably connected in the fixing frame, and a cross bar used in conjunction with the Y-shaped rod is fixedly connected to one side of the elastic wedge-shaped rod.

[0008] Furthermore, it also includes a supporting mechanism, which includes a supporting frame, the supporting frame is symmetrically fixed in the mounting frame, the outer wall of the outer mold is fixed to the supporting frame, the top of the supporting frame is fixed with an elastic telescopic rod, and is symmetrically fixed to a limiting frame, the limiting frame is slidably connected with a Z-shaped rod, the inner wall of the limiting frame is symmetrically fixed with a stopper used in conjunction with the Z-shaped rod, the outer wall of the Z-shaped rod is symmetrically provided with grooves adapted to the stopper, the outer wall of the inner mold is symmetrically fixed with a connecting box, the Z-shaped rod is inserted into the connecting box and slides therein, an elastic member B is arranged between the Z-shaped rod and the inner wall of the connecting box, the outer wall of the outer mold is symmetrically provided with sliding grooves, the connecting box is inserted into the sliding grooves and slides therein, and an elastic member C is arranged between the connecting box and the inner wall of the sliding groove.

[0009] Furthermore, the supporting mechanism also includes a connecting frame, and the outer wall of the mold B is symmetrically fixed with the connecting frame, an elastic member D is arranged between one side of the connecting frame and the mounting frame, the Z-shaped rod is inserted into the connecting frame and slides therein, and the outer wall of the connecting frame is fixed with an extrusion rod used in conjunction with the Z-shaped rod.

[0010] Furthermore, an auxiliary stretching mechanism is also included, which includes a circular ring. The inner walls of the outer mold and the inner mold are both provided with annular grooves, and the circular ring is rotatably connected in the annular groove. The inner wall of the circular ring is symmetrically provided with two groups of special-shaped grooves A, and the inner wall of the special-shaped groove A is provided with a roller A.

[0011] Furthermore, the auxiliary stretching mechanism also includes a roller B, the inner wall of the special-shaped groove A is rotatably connected to the roller B, one end of the roller B is fixedly connected to a universal joint, the inner wall of the special-shaped groove A is fixedly connected to a round tube, one end of the round tube is rotatably connected to the roller A, one end of the universal joint is through-connected to the roller A for rotation and is fixedly connected to a fan-shaped block, the outer wall of the round tube is through-connected to a movable pin for sliding connection, the inner wall of the roller A is provided with a plurality of evenly distributed limit grooves, and the movable pin is used in conjunction with the plurality of limit grooves.

[0012] Furthermore, the auxiliary stretching mechanism also includes a friction wheel A, and the inner wall of the circular ring is symmetrically penetrated with special-shaped grooves B, wherein the inner walls of the two special-shaped grooves B are rotatably connected to the friction wheel A and the rotating shaft A, and are connected to a transmission component A, the transmission component A is respectively connected to the friction wheel A and the rotating shaft A, and the rotating shaft A is in contact with the inner wall of the annular groove of the inner mold.

[0013] Furthermore, the auxiliary stretching mechanism also includes a friction wheel B, and the inner walls of the other two special-shaped grooves B are rotatably connected to the friction wheel B and the rotating shaft B, and are connected to a transmission assembly B, which is respectively connected to the friction wheel B and the rotating shaft B, and the rotating shaft B is in contact with the inner wall of the annular groove of the outer mold.

[0014] Furthermore, a forming process of a cylindrical battery steel shell continuous stretching forming device includes the following steps: S1: Start the hydraulic cylinder, and the telescopic end of the hydraulic cylinder drives the fixed ring and the mold A to descend, so as to perform stretching forming of a small-diameter battery steel shell; S2: When it is necessary to switch to the stretch forming of the battery steel shell with a small diameter, the staff pushes the U-shaped frame through the vertical rod at the bottom of the U-shaped frame. When the telescopic end of the hydraulic cylinder is extended again, the fixing ring squeezes the special-shaped rod to make the mold A and the mold B fall synchronously; S3: When the battery steel shell is stretched and formed, the outer wall of the battery steel shell is rolled by the roller A, and the roller A is limited by the cooperation of the fan-shaped block and the movable pin, thereby improving the stretching effect on the outer wall of the battery steel shell.

[0015] The present invention has the following advantages: 1. Through the design of the switching mechanism, when the molding device needs to be switched from a small-diameter battery steel shell to a large-diameter battery steel shell, the mold A and the mold B can be synchronously dropped downward by the cooperation of the fixing ring and the special-shaped rod, without replacing the entire set of molds. When the molding device is switched to produce a large-diameter battery steel shell, the outer mold can automatically drop downward, greatly improving the work efficiency.

[0016] 2. The present invention designs an auxiliary stretching mechanism. During the stretching process of the battery steel shell, the outer wall of the battery steel shell blank can be rolled by roller A or roller B, thereby further improving the forming efficiency of the battery steel shell. In addition, through the cooperation of the fan-shaped block and the movable pin, the two adjacent rollers A are staggered and limited, so that the roller A and the outer wall of the battery steel shell blank are hard rubbed, which can make the battery steel shell blank more evenly stressed, prevent the battery steel shell blank from breaking during stretching, and improve the stretching quality of the battery steel shell blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the switching mechanism of the present invention; Figure 3 It is a schematic diagram of the installation of the elastic wedge-shaped rod of the present invention; Figure 4It is a structural schematic diagram of the support mechanism of the present invention; Figure 5 It is a schematic diagram of the installation of the stopper of the present invention; Figure 6 It is a structural schematic diagram of the auxiliary stretching mechanism of the present invention; Figure 7 It is a schematic diagram of the installation of the universal joint of the present invention; Figure 8 It is a schematic diagram of the installation of the fan-shaped block of the present invention; Fig. 9 This is a schematic diagram of the installation at the rotation axis A of the present invention; Fig.10 It is a schematic diagram of the installation of the friction wheel B of the present invention.

[0018] The meanings of the reference numerals in the figure are: 1: mounting frame, 201: hydraulic cylinder, 202: fixing ring, 203: mold A, 204: mold B, 205: special-shaped rod, 206: special-shaped frame, 207: outer mold, 208: inner mold, 301: fixing frame, 302: U-shaped frame, 303: wedge block, 304: elastic wedge rod, 401: Y-shaped rod, 501: supporting frame, 502: elastic telescopic rod, 503: limiting frame, 5 04: Z-shaped rod, 505: stopper, 506: connection box, 601: connection frame, 602: extrusion rod, 701: circular ring, 702: special-shaped groove A, 703: roller A, 801: roller B, 802: universal joint, 803: circular tube, 804: sector block, 805: movable pin, 901: special-shaped groove B, 902: friction wheel A, 903: rotating shaft A, 1001: friction wheel B, 1002: rotating shaft B. DETAILED DESCRIPTION

[0019] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments. Example 1

[0020] A cylindrical battery steel shell continuous stretching forming device, such as Figure 1-Figure 3As shown, it includes a mounting frame 1 and a switching mechanism, the switching mechanism includes a hydraulic cylinder 201, the hydraulic cylinder 201 is symmetrically mounted on the mounting frame 1, the outer wall fixed sleeve of the telescopic end of the hydraulic cylinder 201 is provided with a fixing ring 202, the telescopic end of the hydraulic cylinder 201 is fixedly connected with a mold A203, the outer wall sliding sleeve of the mold A203 is provided with a mold B204, and the upper side of the mold A203 is symmetrically provided with a special-shaped rod 205. When the special-shaped rod 205 contacts the bottom end of the fixing ring 202, the hydraulic cylinder 201 can drive the special-shaped rod 205 to fall through the fixing ring 202, and the special-shaped rod 205 can be lowered. The outer wall sliding sleeve of the rod 205 is provided with a special-shaped frame 206, and the special-shaped frame 206 is fixedly connected to the top of the mold B204. An elastic member A is arranged between the special-shaped rod 205 and the special-shaped frame 206, and the elastic member A is a compression spring. The top of the mold B204 is symmetrically provided with sliding grooves, and the bottom end of the special-shaped rod 205 is inserted into the sliding groove and slides therein. It also includes a limiting mechanism. A limiting mechanism is arranged on the upper side of the mold A203, and the limiting mechanism is used to limit the special-shaped rod 205. The outer mold 207 is symmetrically arranged in the mounting frame 1, and the inner wall of the outer mold 207 is slidably connected with the inner mold 208.

[0021] like Figure 2 and Figure 3 As shown, the limiting mechanism includes a fixing frame 301, the front side of the mounting frame 1 is symmetrically fixed with the fixing frame 301, a U-shaped frame 302 is horizontally slidably connected inside the fixing frame 301, a wedge block 303 used in conjunction with the U-shaped frame 302 is fixedly connected to one side of the special-shaped rod 205, when the U-shaped frame 302 squeezes the wedge block 303, two adjacent special-shaped rods 205 can be moved closer to each other, an elastic wedge rod 304 is slidably connected inside the special-shaped frame 206, a wedge groove used in conjunction with the elastic wedge rod 304 is provided on the top of the special-shaped rod 205, and the elastic wedge rod 304 can limit the special-shaped rod 205 by being inserted into the wedge groove of the special-shaped rod 205.

[0022] The limiting mechanism also includes a Y-shaped rod 401, which is horizontally slidably connected to the fixed frame 301. The Y-shaped rod 401 can be used in conjunction with the telescopic end of the hydraulic cylinder 201 and the fixed ring 202. A cross bar used in conjunction with the Y-shaped rod 401 is fixedly connected to one side of the elastic wedge-shaped rod 304. When the fixed ring 202 drives the Y-shaped rod 401 to lift upward, the elastic wedge-shaped rod 304 can be disengaged from the wedge-shaped groove of the special-shaped rod 205.

[0023] The forming device is divided into two states according to different battery steel shell diameters. The first state is the small-diameter battery steel shell forming state. Initially, the elastic wedge rod 304 is in a contracted state, the bottom end of the elastic wedge rod 304 is against the top surface of the adjacent special-shaped rod 205, the elastic part A is in a released state, and there is a gap between the Y-shaped rod 401 and the telescopic end of the hydraulic cylinder 201. The hydraulic cylinder 201 is started, the telescopic end of the hydraulic cylinder 201 extends, and drives the fixing ring 202 and the mold A203 to descend. After the mold A203 descends, it contacts and squeezes the battery steel shell blank, thereby producing a small-diameter battery steel shell.

[0024] The second state of the forming device is the large-diameter battery steel shell forming state. When it is necessary to produce a large-diameter battery steel shell, the telescopic end of the hydraulic cylinder 201 is first controlled to shrink and reset, and then the staff pushes the U-shaped frame 302 to move backward through the vertical rod at the bottom of the U-shaped frame 302. The U-shaped frame 302 is forced to slide backward along the fixed frame 301. After the U-shaped frame 302 moves, it squeezes the wedge surfaces of the two wedge blocks 303. The two wedge blocks 303 are forced to move close to each other and drive the corresponding special-shaped rod 205 to move. The special-shaped rod 205 is forced to slide horizontally along the corresponding special-shaped frame 206, and the elastic member A is forced to shrink. Then the wedge groove of the special-shaped rod 205 is aligned with the corresponding elastic wedge rod 304. The elastic wedge rod 304 is released to drive the cross bar on it to slide downward and fall, and is stuck in the wedge groove of the special-shaped rod 205 to press the special-shaped rod 2 05 is limited, after the cross bar of the elastic wedge-shaped rod 304 falls, the bottom surface of the cross bar and the top surface of the Y-shaped rod 401 are in the same horizontal plane, and the elastic member A remains in a contracted state. At this time, the top surfaces of the two adjacent special-shaped rods 205 are in contact with the bottom ends of the corresponding fixing rings 202, and the hydraulic cylinder 201 is started. The telescopic end of the hydraulic cylinder 201 extends, and the telescopic end of the hydraulic cylinder 201 drives the fixing ring 202 and the mold A203 to fall. The fixing ring 202 squeezes the bottom of the slide groove of the mold B204 through the two special-shaped rods 205, so that the mold B204 is forced to fall downward, and the bottom ends of the molds A203 and B204 are always in the same horizontal plane. After the molds A203 and B204 fall, they contact and squeeze the battery steel shell blank, thereby producing a large-diameter battery steel shell, thereby being able to quickly complete the switching of the forming diameter of the battery steel shell.

[0025] When the forming device needs to be restored from the large-diameter battery steel shell forming state to the small-diameter battery steel shell forming state, the telescopic end of the hydraulic cylinder 201 is controlled to retract and reset, and the hydraulic cylinder 201 drives the fixing ring 202 and the mold A203 to be lifted and reset, and the mold B204 is lifted and reset following the mold A203, and the staff pushes the Y-shaped rod 401 backward through the handle on the Y-shaped rod 401, and the Y-shaped rod 401 slides along the fixing frame 301. After the Y-shaped rod 401 slides, the inclined surface of the Y-shaped rod 401 contacts and squeezes the outer wall of the cross bar of the two elastic wedge-shaped rods 304, and the force belt of the cross bar is The corresponding elastic wedge rod 304 slides upward, and the elastic wedge rod 304 is lifted up and disengaged from the wedge groove of the corresponding special-shaped rod 205. The special-shaped rod 205 can move after being freed from the restriction, and the elastic member A is released to drive the special-shaped rod 205 to slide and reset. After the special-shaped rod 205 is reset, it no longer contacts the bottom end of the fixing ring 202. When the telescopic end of the hydraulic cylinder 201 is extended again, the telescopic end of the hydraulic cylinder 201 drives the fixing ring 202 and the mold A203 to descend downward, thereby completing the switching work of the molding device from the large-diameter battery steel shell molding state to the small-diameter battery steel shell molding state. Example 2

[0026] like Figure 4 and Figure 5 As shown, it also includes a supporting mechanism, which includes a supporting frame 501, the supporting frame 501 is symmetrically fixed inside the mounting frame 1, the outer wall of the outer mold 207 is fixed to the supporting frame 501, the top of the supporting frame 501 is fixed with an elastic telescopic rod 502, and the limiting frame 503 is symmetrically fixed to the front and back, the limiting frame 503 is slidably connected with a Z-shaped rod 504, the inner wall of the limiting frame 503 is symmetrically fixed with a stopper 505 used in conjunction with the Z-shaped rod 504, the stopper 505 is used to limit the Z-shaped rod 504, and the Z-shaped rod 504 The outer wall of the inner mold 208 is symmetrically provided with grooves adapted to the stopper 505, the outer wall of the inner mold 208 is symmetrically fixed with a connecting box 506, the Z-shaped rod 504 is inserted into the connecting box 506 and slides therein, an elastic member B is arranged between the Z-shaped rod 504 and the inner wall of the connecting box 506, and the elastic member B is a compression spring, the outer wall of the outer mold 207 is symmetrically through-type provided with sliding grooves, the connecting box 506 is inserted into the corresponding sliding grooves and slides therein, and an elastic member C is arranged between the connecting box 506 and the inner wall of the sliding groove, and the elastic member C is a compression spring.

[0027] like Figure 4 and Figure 5As shown, the support mechanism also includes a connecting frame 601, and the outer wall of the mold B204 is symmetrically fixed with the connecting frame 601 front and back, and an elastic member D is arranged between one side of the connecting frame 601 and the mounting frame 1, and the elastic member D is an elastic telescopic shaft. The Z-shaped rod 504 is inserted into the connecting frame 601 and slides therein, and the outer wall of the connecting frame 601 is fixed with an extrusion rod 602 used in conjunction with the Z-shaped rod 504, and when the extrusion rod 602 squeezes the Z-shaped rod 504, the Z-shaped rod 504 can slide horizontally.

[0028] like Figure 5-Figure 7 As shown, an auxiliary stretching mechanism is also included, which includes a ring 701. The inner walls of the outer mold 207 and the inner mold 208 are both provided with annular grooves, and the ring 701 is rotatably connected in the annular groove. The inner wall of the ring 701 is symmetrically provided with two groups of special-shaped grooves A702, each group has six, and the inner wall of the special-shaped groove A702 is provided with a roller A703.

[0029] like Figure 7 and Figure 8 As shown, the auxiliary stretching mechanism also includes a roller B801, the inner wall of the special-shaped groove A702 is rotatably connected to the roller B801, one end of the roller B801 is fixedly connected to a universal joint 802, the inner wall of the special-shaped groove A702 is fixedly connected to a round tube 803, one end of the round tube 803 is rotatably connected to the roller A703, one end of the universal joint 802 is rotatably connected to the roller A703 in a through-type manner and is fixedly connected to a fan-shaped block 804, the outer wall of the round tube 803 is slidably connected to a movable pin 805, and the inner wall of the roller A703 is provided with a limiting groove used in conjunction with the movable pin 805.

[0030] like Fig. 9 As shown, the auxiliary stretching mechanism also includes a friction wheel A902, and the inner walls of the circular ring 701 of the outer mold 207 and the inner mold 208 are symmetrically penetrated with special-shaped grooves B901, and the inner wall of the special-shaped groove B901 close to the inner mold 208 is rotatably connected with the friction wheel A902 and the rotating shaft A903, and is connected with a transmission component A, and the transmission component A consists of a transmission wheel A, a conical disk A and a transmission wheel B, and the transmission wheel A, the conical disk A and the transmission wheel B are all rotatably connected to the inner wall of the special-shaped groove B901, wherein the transmission wheel A is fitted with the outer wall of the corresponding friction wheel A902, the conical disk A is fixed to one side of the transmission wheel A, the transmission wheel B is located on the upper side of the transmission wheel A and is fitted with the outer wall of the conical disk A, the transmission wheel B is fitted with the outer wall of the rotating shaft A903, and the rotating shaft A903 is fitted with the inner wall of the annular groove of the inner mold 208.

[0031] like Fig.10As shown, the auxiliary stretching mechanism also includes a friction wheel B1001, and the inner wall of the special-shaped groove B901 near the outer mold 207 is rotatably connected with the friction wheel B1001 and the rotating shaft B1002, and is connected with a transmission component B, and the transmission component B is composed of a transmission wheel C, a conical disk B and a transmission wheel D, and the transmission wheel C, the conical disk B and the transmission wheel D are all rotatably connected with the inner wall of the special-shaped groove B901, wherein the transmission wheel C is fitted with the outer wall of the corresponding friction wheel B1001, the conical disk B is fixed to one side of the transmission wheel C, the transmission wheel D is located on the upper side of the transmission wheel C and is fitted with the outer wall of the conical disk B, the transmission wheel D is fitted with the outer wall of the rotating shaft B1002, and the rotating shaft B1002 is fitted with the inner wall of the annular groove of the outer mold 207.

[0032] Initially, the elastic member B is in a released state, the bottom surface of the Z-shaped rod 504 contacts the top surfaces of the two adjacent stoppers 505, the stoppers 505 limit the outer mold 207 through the Z-shaped rod 504 and the connection box 506, the outer mold 207 is restricted and cannot fall, the elastic member C and the elastic member D are in a released state, the top of the outer mold 207 and the inner mold 208 are in the same horizontal plane, and the two adjacent fan-shaped blocks 804 face opposite directions. When a small-diameter battery steel shell is stretched and formed, the battery steel shell blank is first placed on the inner mold 208 by a feeding device in the prior art, and the mold A203 contacts and squeezes the battery steel shell blank after it falls. After being squeezed, the battery steel shell blank enters the inner mold 208 and squeezes the elastic telescopic rod 50 2 is squeezed, the telescopic end of the elastic telescopic rod 502 is forced to shrink, and the battery steel shell blank contacts and rubs with the roller A703, roller B801 and the outer wall of the friction wheel A902 close to the inner mold 208, and the roller A703 is forced to rotate with the connection point of the corresponding circular tube 803 as the center. When the roller A703 rotates, it can roll the battery steel shell blank, thereby improving the stretching forming efficiency of the battery steel shell blank, preventing the battery steel shell blank from breaking during stretching, and improving the stretching forming quality of the battery steel shell blank. At the same time, the roller B801 drives the corresponding sector block 804 to rotate through the universal joint 802. When the sector block 804 rotates, the bottom end of the movable pin 805 adjacent to it rotates with the rotation of the sector block 804. It is worth noting that when the top of one of the movable pins 805 is away from the limiting groove of the roller A703, the tops of the two adjacent movable pins 805 are respectively inserted into the limiting grooves of the corresponding roller A703, thereby limiting the roller A703. When the fan-shaped block 804 rotates, the two adjacent movable pins 805 can be staggered and lifted, thereby realizing the staggered limiting of the two adjacent rollers A703. When the roller A703 is limited, the roller A703 can further improve the stretching effect of the outer wall of the battery steel shell by hard friction with the outer wall of the battery steel shell blank. When the roller A703 rotates, the battery steel shell blank can be rolled, and the battery steel shell blank can be staggered by the roller A703. The above two different effects can make the force on the battery steel shell blank more uniform and improve the stretching forming quality of the battery steel shell blank. At the same time, the friction wheel A902 is forced to rotate with the connection point of the corresponding special-shaped groove B901 as the center, and rubs with the transmission wheel A in the transmission assembly A, so that the transmission wheel A drives the conical disk A to rotate. The conical disk A rubs with the inclined surface of the transmission wheel B, so that the transmission wheel B drives the corresponding rotating shaft A903 to rotate. The rotating shaft A903 rubs with the inner wall of the annular groove of the inner mold 208, so that the ring 701 close to the inner mold 208 rotates in the annular groove, thereby enabling the roller A703 to increase the contact area with the battery steel shell blank, thereby further improving the stretching forming quality of the battery steel shell blank.

[0033] When a large-diameter battery steel shell is stretched and formed, the battery steel shell blank is placed on the outer mold 207 by a loading device in the prior art. When the mold A203 and the mold B204 are lowered, the mold B204 drives the two connecting frames 601 to drop downward, the elastic member D is forced to shrink, and the connecting frame 601 drives the extrusion rod 602 to drop downward. Then the extrusion rod 602 contacts and squeezes the inclined surface of the corresponding Z-shaped rod 504. At this time, the two adjacent Z-shaped rods 504 are forced to slide away from each other, the elastic member B is forced to shrink, and the Z-shaped rods 504 are forced to slide away from each other. After 504 slides, the two grooves on it are aligned with the corresponding stopper 505, and the Z-shaped rod 504 can move up and down after being freed from the restriction. The extrusion rod 602 continues to squeeze the Z-shaped rod 504, and the Z-shaped rod 504 is forced to drive the corresponding connecting box 506 to fall, and the connecting box 506 drives the inner mold 208 to slide downward, and the elastic member C is forced to shrink. It is worth noting that the elastic force of the elastic member C is greater than that of the elastic member B. During the process of the Z-shaped rod 504 and the connecting box 506 falling, the elastic member B remains in a contracted state. At the same time, the mold A20 3 and the mold B204 contact and extrude the battery steel shell blank. After being extruded, the battery steel shell blank enters the outer mold 207 and squeezes the telescopic end of the elastic telescopic rod 502. The telescopic end of the elastic telescopic rod 502 is forced to shrink, and the battery steel shell blank contacts and rubs with the outer wall of the roller A703, roller B801 and friction wheel B1001 close to the outer mold 207. After the roller A703 and roller B801 are stressed, the above steps are repeated to achieve the same effect. After the friction wheel B1001 is stressed, it is rotated in a direction corresponding to the special-shaped groove B901. The connection rotates at the center of the circle, and through friction with the transmission wheel C in the transmission assembly B, the transmission wheel C drives the conical disk B to rotate. The conical disk B rubs with the inclined surface of the transmission wheel D, so that the transmission wheel D drives the corresponding rotating shaft B1002 to rotate. The rotating shaft B1002 rubs with the inner wall of the annular groove of the outer mold 207, so that the ring 701 close to the outer mold 207 rotates in the annular groove, thereby enabling the roller A703 to increase the contact area with the battery steel shell blank, thereby further improving the stretching forming quality of the battery steel shell blank.

[0034] When the mold A203 is lifted upward and reset, the telescopic end of the elastic telescopic rod 502 squeezes the outer wall of the battery steel shell through the disc, so that the battery steel shell is lifted upward. When a small-diameter battery steel shell is stretched and formed, the roller A703, roller B801, friction wheel A902 and rotating shaft A903 rotate in the opposite direction of the above steps under the friction of the outer wall of the battery steel shell and achieve the same effect. It is worth noting that due to the large elastic force of the telescopic end of the elastic telescopic rod 502, when the roller A703 stops rotating, the telescopic end of the elastic telescopic rod 502 can still drive the battery steel shell to lift upward through the disc.

[0035] When forming a large-diameter battery steel shell, roller A703, roller B801, friction wheel B1001 and rotating shaft B1002 rotate in the opposite direction of the above steps under the friction of the outer wall of the battery steel shell and achieve the same effect.

[0036] When the mold B204 is lifted upward, the mold B204 drives the two extrusion rods 602 to be lifted upward through the two connecting frames 601, and the elastic parts C and D are gradually released. Then, the two grooves of the Z-shaped rod 504 pass over the corresponding blocks 505, and the elastic part C is completely released. The two extrusion rods 602 continue to be lifted upward and move away from the corresponding Z-shaped rods 504. The Z-shaped rod 504 can move after being freed from the restriction. The elastic part B is released to drive the Z-shaped rod 504 to slide horizontally and reset. The telescopic end of the elastic telescopic rod 502 is released and reset, and then the battery steel shell can be taken out through the unloading mechanism in the prior art.

[0037] A forming process of a cylindrical battery steel shell continuous stretching forming device includes the following steps: S1: Start the hydraulic cylinder 201, and the telescopic end of the hydraulic cylinder 201 drives the fixed ring 202 and the mold A203 to descend, and perform stretching forming of a small-diameter battery steel shell; S2: When it is necessary to switch to the stretch forming of the battery steel shell with a small diameter, the staff pushes the U-shaped frame 302 through the vertical rod at the bottom of the U-shaped frame 302. When the telescopic end of the hydraulic cylinder 201 is extended again, the fixed ring 202 squeezes the special-shaped rod 205, so that the mold A203 and the mold B204 fall synchronously; S3: When the battery steel shell is stretched and formed, the outer wall of the battery steel shell is rolled by roller A703, and the roller A703 is limited by the cooperation of the fan-shaped block 804 and the movable pin 805, thereby improving the stretching effect on the outer wall of the battery steel shell.

[0038] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A cylindrical battery steel shell continuous stretching forming device, comprising a mounting frame (1), characterized in that: The invention also comprises a switching mechanism, the switching mechanism comprising a hydraulic cylinder (201), the hydraulic cylinder (201) being symmetrically mounted on the mounting frame (1), the outer wall fixing sleeve of the telescopic end of the hydraulic cylinder (201) being provided with a fixing ring (202), the telescopic end of the hydraulic cylinder (201) being fixedly connected with a mold A (203), the outer wall sliding sleeve of the mold A (203) being provided with a mold B (204), the upper side of the mold A (203) being symmetrically provided with a special-shaped rod (205), the outer wall sliding sleeve of the special-shaped rod (205) being provided with a special-shaped frame (204). 6), the special-shaped frame (206) is fixedly connected to the top of the mold B (204), an elastic member A is arranged between the special-shaped rod (205) and the special-shaped frame (206), the top of the mold B (204) is symmetrically provided with sliding grooves, the bottom end of the special-shaped rod (205) is inserted into the sliding groove and slides therein, and also includes a limiting mechanism, the upper side of the mold A (203) is provided with a limiting mechanism, the mounting frame (1) is symmetrically provided with an outer mold (207), and the inner wall of the outer mold (207) is slidably connected with an inner mold (208).

2. A cylindrical battery steel shell continuous stretching forming device according to claim 1, characterized in that: The limiting mechanism comprises a fixing frame (301), the fixing frame (301) is symmetrically fixedly connected to the front side of the mounting frame (1), a U-shaped frame (302) is slidably connected inside the fixing frame (301), a wedge block (303) used in conjunction with the U-shaped frame (302) is fixedly connected to one side of the special-shaped rod (205), an elastic wedge-shaped rod (304) is slidably connected inside the special-shaped frame (206), and a wedge-shaped groove used in conjunction with the elastic wedge-shaped rod (304) is provided on the top of the special-shaped rod (205).

3. A cylindrical battery steel shell continuous stretching forming device according to claim 2, characterized in that: The limiting mechanism also includes a Y-shaped rod (401), the Y-shaped rod (401) is slidably connected in the fixing frame (301), and a crossbar used in conjunction with the Y-shaped rod (401) is fixedly connected to one side of the elastic wedge-shaped rod (304).

4. A cylindrical battery steel shell continuous stretching forming device according to claim 3, characterized in that: The mounting frame (1) further comprises a support mechanism, the support mechanism comprising a support frame (501), the support frame (501) being symmetrically fixedly connected inside the mounting frame (1), the outer wall of the outer mold (207) being fixedly connected to the support frame (501), the top of the support frame (501) being fixedly connected to an elastic telescopic rod (502), and being symmetrically fixedly connected to a limiting frame (503), the limiting frame (503) being slidably connected to a Z-shaped rod (504), the inner wall of the limiting frame (503) being symmetrically fixedly connected to a stopper (505) used in conjunction with the Z-shaped rod (504), the Z-shaped rod ( The outer wall of the inner mold (208) is symmetrically provided with grooves adapted to the stopper (505); the outer wall of the inner mold (208) is symmetrically fixed with a connection box (506); the Z-shaped rod (504) is inserted into the connection box (506) and slides therein; an elastic member B is provided between the Z-shaped rod (504) and the inner wall of the connection box (506); the outer wall of the outer mold (207) is symmetrically provided with sliding grooves through-through; the connection box (506) is inserted into the sliding grooves and slides therein; an elastic member C is provided between the connection box (506) and the inner wall of the sliding groove.

5. The cylindrical battery steel shell continuous stretching forming device according to claim 4, characterized in that: The support mechanism further comprises a connecting frame (601), the connecting frame (601) being symmetrically fixedly connected to the outer wall of the mold B (204), an elastic member D being arranged between one side of the connecting frame (601) and the mounting frame (1), the Z-shaped rod (504) being inserted into the connecting frame (601) and sliding therein, and an extrusion rod (602) being fixedly connected to the outer wall of the connecting frame (601) and used in conjunction with the Z-shaped rod (504).

6. The cylindrical battery steel shell continuous stretching forming device according to claim 5, characterized in that: The invention also comprises an auxiliary stretching mechanism, which comprises a circular ring (701). The inner walls of the outer mold (207) and the inner mold (208) are both provided with an annular groove, in which the circular ring (701) is rotatably connected. The inner wall of the circular ring (701) is symmetrically provided with two groups of special-shaped grooves A (702), and the inner wall of the special-shaped groove A (702) is provided with a roller A (703).

7. A cylindrical battery steel shell continuous stretching forming device according to claim 6, characterized in that: The auxiliary stretching mechanism also includes a roller B (801), the inner wall of the special-shaped groove A (702) is rotatably connected to the roller B (801), one end of the roller B (801) is fixedly connected to a universal joint (802), the inner wall of the special-shaped groove A (702) is fixedly connected to a round tube (803), one end of the round tube (803) is rotatably connected to the roller A (703), one end of the universal joint (802) is through-connected to the roller A (703) for rotation and fixedly connected to a fan-shaped block (804), the outer wall of the round tube (803) is through-connected to a movable pin (805) for sliding connection, the inner wall of the roller A (703) is provided with a plurality of evenly distributed limiting grooves, and the movable pin (805) is used in conjunction with the plurality of limiting grooves.

8. The cylindrical battery steel shell continuous stretching forming device according to claim 7, characterized in that: The auxiliary stretching mechanism also includes a friction wheel A (902), and the inner wall of the circular ring (701) is symmetrically penetrated with a special-shaped groove B (901), wherein the inner walls of the two special-shaped grooves B (901) are rotatably connected to the friction wheel A (902) and the rotating shaft A (903), and are connected to a transmission component A, and the transmission component A is respectively connected to the friction wheel A (902) and the rotating shaft A (903), and the rotating shaft A (903) is in contact with the inner wall of the annular groove of the inner mold (208).

9. A cylindrical battery steel shell continuous stretching forming device according to claim 8, characterized in that: The auxiliary stretching mechanism also includes a friction wheel B (1001), and the inner walls of the other two special-shaped grooves B (901) are rotatably connected to the friction wheel B (1001) and the rotating shaft B (1002), and are connected to a transmission component B, which is respectively connected to the friction wheel B (1001) and the rotating shaft B (1002), and the rotating shaft B (1002) is in contact with the inner wall of the annular groove of the outer mold (207).

10. The forming process of the cylindrical battery steel shell continuous stretching forming device according to claim 9, characterized in that: The following steps are included: S1: starting the hydraulic cylinder (201), and the telescopic end of the hydraulic cylinder (201) drives the fixing ring (202) and the mold A (203) to descend, thereby performing stretching and forming of a small-diameter battery steel shell; S2: When it is necessary to switch to stretch forming of a battery steel shell with a small diameter, a worker pushes the U-shaped frame (302) through the vertical rod at the bottom of the U-shaped frame (302). When the telescopic end of the hydraulic cylinder (201) is extended again, the fixing ring (202) squeezes the special-shaped rod (205), so that the mold A (203) and the mold B (204) are synchronously lowered; S3: When the battery steel shell is being stretched and formed, the outer wall of the battery steel shell is rolled by the roller A (703), and the roller A (703) is limited by the cooperation between the fan-shaped block (804) and the movable pin (805), thereby improving the stretching effect on the outer wall of the battery steel shell.

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