Material switching device, stamping equipment and hairpin wire production line

Abstract

The invention belongs to the technical field of motor assembly, and relates to a material switching device, stamping equipment and a hairpin wire production line. The fixing piece is provided with a cam groove, and the cam groove comprises an arc-shaped groove and a variable-diameter groove; the rotating part is positioned between the base and the fixed part and is rotationally connected with the base; the carriers are arranged in the circumferential direction of the rotating part at intervals, the carriers are movably connected with the rotating part, cams matched with the cam grooves are arranged at one ends of the carriers, and the carriers are used for bearing target materials; when the rotating part drives the at least two carriers to rotate, the cam of any carrier moves along the cam groove, and when the cam moves to the far end of the variable-diameter groove, the carrier is pushed to move in the direction away from the rotating center of the rotating part, so that the target material is conveyed to an operation station. According to the device, various different molds can be automatically switched to produce different hairpin wires, the time for manually replacing the molds is saved, the production takt is accelerated, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor assembly, and in particular to a material switching device, a stamping device and a card-issuing wire production line. Background Art

[0002] As the driving motor of future new energy vehicles, the stator winding of the flat wire motor is wound with a rectangular wire cross-section. Compared with the traditional round wire motor with a round wire cross-section, more wires can be stuffed into the stator wire slot of the same area, thereby increasing the power density. Therefore, under the same volume, the flat wire motor can be stuffed with more stator windings, so that the flat wire motor can output higher power and torque under the same loss, which is particularly suitable for the application requirements of miniaturization and lightweight of automotive drive motors.

[0003] At present, the common form of the wire in the flat wire motor is a hairpin. The hairpin wire includes a bent portion and two straight portions, wherein the bent portion is punched into a preset shape by a punching mechanism, and the two straight portions are parallel to each other and located at both ends of the bent portion, forming a "U"-shaped structure. Since the structures and sizes of the hairpin wires required for flat wire motors of different specifications are different, when punching different hairpin wires on the production line through a punching mechanism, different stamping dies need to be manually replaced, which wastes production time and has low production efficiency. Summary of the invention

[0004] The purpose of the present application is to provide a material switching device, stamping equipment and a hairpin wire production line, which can automatically switch between a variety of different molds to produce different hairpin wires, saving time for manual mold replacement, speeding up production rhythm, and helping to improve production efficiency.

[0005] In a first aspect, an embodiment of the present application provides a material switching device, comprising: a base; a fixed member fixedly connected to the base, a cam groove being arranged on the fixed member, the cam groove comprising an arc groove and a reducing groove connected to each other, the maximum distance between the distal end of the central contour line of the reducing groove and the center of the arc groove being greater than the radius of the central contour line of the arc groove; a rotating member located between the base and the fixed member and rotatably connected to the base; and at least two carriers arranged at intervals along the circumference of the rotating member, and the carriers being movably connected to the rotating member, a cam cooperating with the cam groove being arranged at one end of the carrier, and the carrier being used to carry target materials; wherein, when the rotating member drives at least two carriers to rotate, the cam of any carrier moves along the cam groove, and when the cam moves to the distal end of the reducing groove, the carrier is pushed to move in a direction away from the rotation center of the rotating member, so as to transport the target materials to the work station.

[0006] In a possible implementation, the central contour line of the variable diameter groove and the central contour line of the arc groove are tangent to each other at the connection point, and the central angle of the arc groove has a value range of 270° to 290°.

[0007] In a possible implementation, the carrier is detachably connected to the target material.

[0008] In a possible implementation, a first positioning pin is provided at one end of the carrier away from the cam, and a first positioning hole matching with the first positioning pin is provided on the target material.

[0009] In a possible implementation, the material switching device further includes a plurality of moving mechanisms, the plurality of moving mechanisms correspond one-to-one to the plurality of carriers, and the carriers are movably connected to the rotating member via the moving mechanisms.

[0010] In a possible implementation, the moving mechanism includes a guide rail and a slider slidably connected to the guide rail, the guide rail extends along the radial direction of the rotating member and is fixedly connected to the rotating member, and the slider is connected to the carrier.

[0011] In a possible implementation, the material switching device also includes an in-situ detection component, which includes a support frame and a position sensor connected to the support frame, the support frame is connected to the fixing member, and the position sensor is arranged toward the working station.

[0012] In a possible implementation, the rotating member is provided with a plurality of weight-reducing holes at intervals along its circumference.

[0013] In the second aspect, an embodiment of the present application provides a stamping equipment, including: a base, having an operating station and a fixed plate located above the operating station; a material switching device of each embodiment of the present application, wherein the base of the material switching device is connected to the base; at least two molds, wherein the molds are detachably connected to a carrier of the material switching device to transport the molds to the operating station, and the molds have a mold cavity for accommodating a hairpin wire blank; a positioning assembly, which is movably connected to the base, and when the material switching device transports the mold to the operating station, the positioning assembly is used to switch the mold from the carrier and position it to the operating station; and a stamping assembly, which is connected to the fixed plate, and the stamping assembly is used to stamp the hairpin wire blank into a hairpin wire after the mold is positioned at the operating station.

[0014] In one possible implementation, the mold includes a first substrate, a fixed mold, a movable mold and a second substrate, the fixed mold is fixedly connected to the first substrate, the movable mold is fixedly connected to the second substrate, the movable mold and the fixed mold are movably connected to form a mold cavity; the positioning assembly includes a first locking assembly and a second locking assembly, the first locking assembly is located below the working station, and the second locking assembly is connected to the fixed plate; when the mold reaches the working station, the first locking assembly is used to lift the mold to detach the mold from the carrier and lock the first substrate of the mold at the same time, and the second locking assembly is used to lock the second substrate of the mold.

[0015] In one possible implementation, the first locking assembly includes a first driving member, a support plate, a second driving member and a first clamp, the first driving member is fixedly connected to the base, the output end of the first driving member is connected to the support plate, a second positioning pin is provided on the support plate, the second driving member is fixedly connected to the support plate, and the output end of the second driving member is rotatably connected to the first clamp; a first positioning hole and a second positioning hole are spaced apart on the first substrate, and a carrier is provided with a first positioning pin that cooperates with the first positioning hole. When the mold arrives at the working station, the first driving member drives the support plate to lift the mold so that the first positioning hole is disengaged from the first positioning pin, and the second positioning pin passes through the second positioning hole, and at the same time, the second driving member drives the first clamp to rotate and lock the first substrate.

[0016] In one possible implementation, the second locking assembly includes a third driving member and a second clamp, a third positioning pin is provided on the fixed plate, a third positioning pin is provided on the fixed plate, the third driving member is fixedly connected to the fixed plate, the output end of the third driving member is connected to the second clamp, and a third positioning hole matching the third positioning pin is provided on the second substrate; when the mold is positioned at the working station, the third positioning pin passes through the third positioning hole, and at the same time the third driving member drives the second clamp to rotate and lock the second substrate.

[0017] In a possible implementation, the movable mold includes a first movable mold part and a second movable mold part which are connected to each other, the first movable mold part is fixedly connected to the second substrate, the second movable mold part is slidably connected to the first movable mold part, and the second substrate is provided with a through hole corresponding to the position of the second movable mold part; the stamping assembly includes a fourth driving member and a stamping head, the fourth driving member is fixedly connected to the fixed plate, and the output end of the fourth driving member is connected to the stamping head to drive the movable mold to approach or move away from the fixed mold; a part of the stamping head passes through the through hole and drives the second movable mold part to press against the straight part of the hairpin wire, and the other part of the stamping head is used to drive the second substrate and the first movable mold part to cooperate with the fixed mold to form the bending part of the hairpin wire.

[0018] On the third aspect, the embodiments of the present application provide a hairpin wire production line, including: the stamping equipment of each embodiment of the present application; and a loading and unloading assembly, which runs through the working station arrangement of the stamping equipment, and the loading and unloading assembly is used to load the hairpin wire blank into the mold of the stamping equipment, or to unload the formed hairpin wire from the mold.

[0019] According to the material switching device, stamping equipment and card-issuing wire production line provided by the embodiment of the present application, the material switching device includes a base, a fixed part fixedly connected to the base, a rotating part rotatably connected to the base, and at least two carriers arranged at intervals along the circumference of the rotating part, and the carrier is movably connected to the rotating part, by setting a cam groove on the fixed part, and a cam matching the cam groove is set at one end of the carrier, and the carrier is used to carry the target material; when the rotating part drives at least two carriers to rotate, the cam of any carrier moves along the cam groove, and the cam groove includes an arc groove and a reducing groove, and when the cam moves to the far end of the reducing groove, it pushes the carrier to move radially away from the rotating part to transport the target material to the working station. Therefore, according to the working principle of the cam moving along the cam groove, by designing the rotation radius of the cam groove at the working station to change, the required target material can be automatically moved to the working station, and when other target materials need to be replaced, the other target materials only need to be transported to the working station through the carrier, and there is no need to manually carry the target material. The material switching device is applied to the production of hairpin wires, and can automatically switch between a variety of different molds to produce different hairpin wires, saving time for manual mold replacement, speeding up production rhythm, and helping to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram showing the three-dimensional structure of a material switching device provided in an embodiment of the present application is shown; Figure 2 Show Figure 1 A schematic diagram of the top view of the material switching device shown; Figure 3 A schematic diagram showing the structure of a stamping device provided in an embodiment of the present application is shown; Figure 4 Show Figure 3 A schematic diagram of the local enlarged structure of the middle area A; Figure 5 Show Figure 3 Schematic diagram of the assembly structure of the die and hairpin wire of the punching equipment; Figure 6 Show Figure 5 A schematic structural diagram of a first substrate of a middle mold; Figure 7 Show Figure 5 A schematic structural diagram of the second substrate of the middle mold; Figure 8 Shown along Figure 3The schematic diagram of the structure looking toward M in the middle; Fig. 9 Shown along Figure 8 A schematic diagram of the enlarged structure of the middle area B; Fig.10 Shown along Figure 8 Schematic diagram of the enlarged structure of the middle area C; Fig.11 Show Fig.10 A schematic diagram of the local enlarged structure of the middle area D; Fig.12 A structural schematic diagram of a hairpin wire production line provided in an embodiment of the present application is shown.

[0021] The reference numerals in the accompanying drawings represent the following: 100, stamping equipment; 200, loading and unloading assembly; 201, limit plate; 202, pallet; 1. Material switching device; 10. base; 11. fixing member; 111. cam groove; 111a. arc groove; 111b. variable diameter groove; 12. Rotating parts; 121. Weight reduction holes; 13. carrier; 131. cam; 132. first positioning pin; 14. moving mechanism; 141. guide rail; 142. slider; 15. position detection assembly; 151. support frame; 151a. first rod; 151b. second rod; 152. position sensor; 2. Base; 21. Fixing plate; 22. Third positioning pin; 3. Positioning assembly; 31. First locking assembly; 311. First driving member; 312. Support plate; 313. Second driving member; 314. First clamping claw; 315. Second positioning pin; 32. Second locking assembly; 321. Third driving member; 322. Second clamping claw; 4. Mold; 43. First substrate; 431. First positioning hole; 432. Second positioning hole; 41. Fixed mold; 42. Moving mold; 421. First moving mold piece; 422. Second moving mold piece; 44. Second substrate; 441. Third positioning hole; 442. Through hole; 5. Hairpin wire; 51. Bend portion; 52. Straight portion; 6. Stamping assembly; 61. Stamping head; 62. Fourth driving member. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a material switching device provided in an embodiment of the present application is shown. Figure 2 Show Figure 1 A schematic diagram of the top structure of the material switching device is shown.

[0024] See also Figure 1 and Figure 2 The material switching device 1 provided in the embodiment of the present application includes a base 10 , a fixing member 11 , a rotating member 12 and at least two carriers 13 .

[0025] The fixing member 11 is fixedly connected to the base 10, and a cam groove 111 is provided on the fixing member 11. The cam groove 111 includes an arc groove 111a and a reducing groove 111b connected to each other, and the maximum distance between the distal end of the center contour line of the reducing groove 111b and the center of the arc groove 111a is greater than the radius of the center contour line of the arc groove 111a. Optionally, the fixing member 11 is a disc-shaped structural member, which has a simple structure, occupies a small space, and is easy to process.

[0026] The rotating member 12 is located between the base 10 and the fixed member 11, and is rotatably connected to the base 10. Optionally, the rotating member 12 is a disc-shaped structural member, which has a simple structure, occupies a small space, and is easy to process. In addition, the diameter of the rotating member 12 is larger than the diameter of the fixed member 11, so that the carrier 13 can be arranged on the rotating member 12.

[0027] At least two carriers 13 are arranged at intervals along the circumference of the rotating member 12 , and the carriers 13 are movably connected to the rotating member 12 . A cam 131 that cooperates with the cam groove 111 is provided at one end of the carrier 13 , and the carrier 13 is used to carry the target material.

[0028] When the rotating member 12 drives at least two carriers 13 to rotate, the cam 131 of any carrier 13 moves along the cam groove 111, and when the cam 131 moves to the far end of the reducing groove 111b, the carrier 13 is pushed to move in a direction away from the rotation center of the rotating member 12 to transport the target material to the work station.

[0029] In this embodiment, the cam groove 111 includes an arc groove 111a and a diameter-changing groove 111b, and the maximum distance between the distal end of the center contour line of the diameter-changing groove 111b and the center of the arc groove 111a is greater than the radius of the center contour line of the arc groove 111a. Figure 2 As shown by the dotted line in , the "center contour line" refers to the set of points that are equidistant from the two contour lines of the two wall portions forming the cam groove 111. In the circumferential direction of the fixed part 11, the radius of the arc groove 111a remains unchanged. During the movement of the carrier 13 along the arc groove 111a of the cam groove 111 through the cam 131, there is no relative movement between the carrier 13 and the rotating part 12, so that the target material rotates smoothly. The distance between the center contour line of the reducing groove 111b and the center of the arc groove 111a gradually increases along the circumferential direction, which can push the carrier 13 to drive the target material to move radially away from the rotating part 12, wherein the maximum distance between the far end of the center contour line of the reducing groove 111b and the center of the arc groove 111a is greater than the radius of the center contour line of the arc groove 111a, and the difference between the two is the distance that the carrier 13 moves radially along the rotating part 12.

[0030] In one example, the number of carriers 13 is three, and the three carriers 13 are arranged at equal angles along the circumference of the rotating member 12. The number of carriers 13 can also be two or four or more, depending on specific usage requirements. The target materials carried by multiple carriers 13 can be the same. When one of the target materials is damaged, the other target materials can be transported to the operating station through the carrier 13, reducing the time for manual replacement of the target materials. The target materials carried by multiple carriers 13 are different. When the operation of one of the target materials is completed and other target materials need to be replaced, the other target materials can be transported to the operating station through the carrier 13, reducing the time for manual replacement of the target materials.

[0031] According to the material switching device provided in the embodiment of the present application, it includes a base 10, a fixed part 11 fixedly connected to the base 10, a rotating part 12 rotatably connected to the base 10, and at least two carriers 13 arranged at intervals along the circumference of the rotating part 12, and the carrier 13 is movably connected to the rotating part 12, by setting a cam groove 111 on the fixed part 11, and setting a cam 131 that cooperates with the cam groove 111 at one end of the carrier 13, and the carrier 13 is used to carry the target material; when the rotating part drives at least two carriers 13 to rotate, the cam 131 of any carrier 13 moves along the cam groove 111, and the cam groove 111 includes an arc groove 111a and a reducing groove 111b, and when the cam 131 moves to the far end of the reducing groove 111b, the carrier 13 is pushed to move in a direction away from the rotation center of the rotating part 12 to transport the target material to the working station. Therefore, according to the working principle of the cam 131 moving along the cam groove 111, by designing the change in the rotation radius of the cam groove 111 at the work station, the required target material can be automatically moved to the work station. When other target materials need to be replaced, the other target materials only need to be transported to the work station through the carrier 13, and there is no need to manually carry the target materials. The material switching device is applied to the production of hairpin wires, and a variety of different molds can be automatically switched to produce different hairpin wires, saving the time of manual mold replacement, speeding up the production cycle, and helping to improve production efficiency.

[0032] In some embodiments, the center contour line of the reducing groove 111b is tangent to the center contour line of the arc groove 111a at the connection, and the value range of the center angle of the arc groove is 270°~290°. In one example, the center angle of the arc groove is 280°, so that the angle θ formed by the center contour line of the reducing groove 111b and the center contour line of the arc groove 111a at the connection is tangent to each other, which can reserve a suitable space for the radial movement of the carrier 13 along the rotating member 12. The angle θ can also be other values, depending on the distance of the radial movement of the carrier 13 along the rotating member 12.

[0033] In addition, the central contour line of the reducing groove 111b is tangent to the central contour line of the arc groove 111a at the connection point, so that the carrier 13 can drive the target material to smoothly transition from the arc groove 111a to the reducing groove 111b, preventing the target material from deviating during the rotation process.

[0034] In some embodiments, the carrier 13 is detachably connected to the target material.

[0035] When there are enough types of target materials and they cannot all be placed on the rotating member 12 at the same time, the carrier 13 can be detachably connected to the target materials to improve the efficiency of replacing the target materials. The target materials can be replaced by a forklift or by manual handling.

[0036] In some embodiments, a first positioning pin 132 is disposed at one end of the carrier 13 away from the cam 131 , and a first positioning hole 431 matching with the first positioning pin 132 is disposed on the target material.

[0037] like Figure 1 As shown, two first positioning pins 132 are spaced apart at one end of the carrier 13 away from the cam 131, and correspondingly, two first positioning holes 431 are provided on the target material. The carrier 13 and the target material can be quickly disassembled and assembled through the cooperation between the first positioning pins 132 and the first positioning holes 431, thereby improving the efficiency of replacing the target material.

[0038] In some embodiments, the material switching device 1 further includes a plurality of moving mechanisms 14, and the plurality of moving mechanisms 14 correspond to the plurality of carriers 13 one by one, and the carriers 13 are movably connected to the rotating member 12 through the moving mechanisms 14. The moving mechanism 14 does not require an additional driving source to drive, and the working principle that the cam 131 moves along the cam groove 111 can enable the carrier 13 to automatically push the target material to the working station.

[0039] In some embodiments, the moving mechanism 14 includes a guide rail 141 and a slider 142 slidably connected to the guide rail 141, the guide rail 141 extends along the radial direction of the rotating member 12 and is fixedly connected to the rotating member 12, and the slider 142 is connected to the carrier 13. The moving mechanism 14 composed of the guide rail 141 and the slider 142 has a simple structure and is easy to implement. In other embodiments, the moving mechanism 14 may also include rollers and slide rails to achieve the movement of the carrier 13 by rolling, which will not be repeated.

[0040] In some embodiments, the material switching device 1 also includes an in-situ detection component 15, which includes a support frame 151 and a position sensor 152 connected to the support frame 151, the support frame 151 is connected to the fixing member 11, and the position sensor 152 is arranged toward the working station.

[0041] like Figure 1 As shown, the support frame 151 includes a first rod 151a extending in the vertical direction and a second rod 151b extending in the horizontal direction. The position sensor 152 is connected to the free end of the second rod 151b, and the position sensor 152 is arranged toward the working station. The position sensor 152 can be an infrared sensor, a photoelectric sensor, etc. When the carrier 13 drives the target material to rotate to the working station, the position sensor 152 can detect the target material and send an electrical signal to facilitate the next process. The support frame 151 is arranged at a position close to the reducing groove 111b of the fixing member 11, and the length of the second rod 151b can be shortened as much as possible.

[0042] In some embodiments, the rotating member 12 is provided with a plurality of weight-reducing holes 121 at intervals along its circumference. Figure 2 As shown, the rotating member 12 is provided with six weight-reducing holes 121 at intervals along its circumference, and the carrier 13 is provided between two adjacent weight-reducing holes 121. The number of the weight-reducing holes 121 can also be three, four, or any other number, and the weight-reducing holes 121 can reduce the weight of the rotating member 12 and improve the rigidity and strength of the rotating member 12.

[0043] In some embodiments, the material switching device 1 further includes a driving assembly, the driving assembly is fixedly connected to the base 10, and the output end of the driving assembly is connected to the rotating member 12 to drive the rotating member 12 to rotate. The driving assembly can be a motor and a reducer, the output end of the reducer is connected to the rotating member 12, the motor can be a servo motor or a stepper motor, and the motor drives the reducer to drive the rotating member 12 to rotate, so as to transport the target material to the working station.

[0044] Figure 3 A schematic structural diagram of the stamping equipment provided in an embodiment of the present application is shown.

[0045] See also Figure 3 An embodiment of the present application provides a stamping device 100, including a material switching device 1, a base 2, a positioning component 3, at least two molds 4 and a stamping component 6 provided in each embodiment of the present application.

[0046] The base 2 has an operating station and a fixed plate 21 located above the operating station. The base 10 of the material switching device 1 is connected to the base 2. The mold 4 is detachably connected to the carrier 13 of the material switching device 1 to transport the mold 4 to the operating station. The mold 4 has a mold cavity for accommodating a hairpin wire blank.

[0047] The positioning assembly 3 is movably connected to the base 2 . When the material switching device 1 transports the mold 4 to the working station, the positioning assembly 3 is used to switch the mold 4 from the carrier 13 and position it to the working station.

[0048] The punching assembly 6 is connected to the fixing plate 21 , and is used to punch the hairpin wire blank into the hairpin wire 5 after the mold 4 is positioned at the working station.

[0049] In this embodiment, the target material is a mold 4, and the mold 4 has a mold cavity for accommodating a hairpin wire blank. Since there are multiple types of hairpin wires 5, the sizes of different types of hairpin wires 5 are different, and accordingly, the structures of the molds 4 are also different. The number of molds 4 can be two, three, four or more. The material switching device 1 can automatically move the required mold 4 to the working station through the cam 131 along the cam groove 111, and when other molds 4 need to be replaced, it is only necessary to transport other molds 4 to the working station through the carrier 13, without the need for manual handling of the mold 4. Then the positioning component 3 switches the mold 4 from the carrier 13 and positions it to the working station, and the stamping component 6 stamps the hairpin wire blank into the hairpin wire 5. The positioning component 3 can prevent the mold 4 from being offset or tipping over when performing the stamping action, thereby improving the assembly stability of the mold 4. Therefore, the material switching device 1 can automatically switch multiple different molds 4 to produce different hairpin wires 5, saving the time of manual mold replacement, speeding up the production cycle, and helping to improve production efficiency.

[0050] Figure 4 Show Figure 3 Schematic diagram of the local enlarged structure of area A in the middle. Figure 5 Show Figure 3 Schematic diagram of the assembly structure of the die and hairpin wire of the stamping equipment. Figure 6 Show Figure 5 A schematic diagram of the structure of the first substrate of the middle mold, Figure 7 Show Figure 5 Schematic diagram of the structure of the second substrate of the middle mold.

[0051] In some embodiments, the mold 4 includes a first substrate 43, a fixed mold 41, a movable mold 42 and a second substrate 44. The fixed mold 41 is fixedly connected to the first substrate 43, the movable mold 42 is fixedly connected to the second substrate 44, and the movable mold 42 and the fixed mold 41 are movably connected to form a mold cavity; the positioning assembly 3 includes a first locking assembly 31 and a second locking assembly 32, the first locking assembly 31 is located below the working station, and the second locking assembly 32 is connected to the fixed plate 21; when the mold 4 reaches the working station, the first locking assembly 31 is used to lift the mold 4 so that the mold 4 is detached from the carrier 13, and at the same time locks the first substrate 43 of the mold 4, and the second locking assembly 32 is used to lock the second substrate 44 of the mold 4.

[0052] See also Figures 4 to 7When the mold 4 is transported to the working station through the material switching device 1, the first locking component 31 lifts the mold 4 by a first distance to separate the mold 4 from the carrier 13. At the same time, the first locking component 31 locks the first base plate 43 of the mold 4, and the second locking component 32 locks the second base plate 44 of the mold 4 to position the mold 4 to the working station. After the first locking component 31 drives the first base plate 43 and the fixed mold 41 to descend by a second distance, the movable mold 42 is separated from the fixed mold 41, and the hairpin wire blank can be placed in the mold cavity at this time. The second distance is smaller than the first distance.

[0053] Figure 8 Shown along Figure 3 The schematic diagram of the structure looking towards M in the middle. Fig. 9 Show Figure 8 Schematic diagram of the enlarged structure of area B in the middle.

[0054] In some embodiments, the first locking assembly 31 includes a first driving member 311, a support plate 312, a second driving member 313 and a first clamping jaw 314, the first driving member 311 is fixedly connected to the base 2, the output end of the first driving member 311 is connected to the support plate 312, the support plate 312 is provided with a second positioning pin 315, the second driving member 313 is fixedly connected to the support plate 312, and the output end of the second driving member 313 is connected to the first clamping jaw 314; the first substrate 43 is provided with a first positioning hole 431 and a second positioning hole 432 at intervals, the carrier 13 is provided with a first positioning pin 132 that cooperates with the first positioning hole 431, when the mold 4 arrives at the working station, the first driving member 311 drives the support plate 312 to lift the mold 4 so that the first positioning hole 431 is disengaged from the first positioning pin 132, and the second positioning pin 315 passes through the second positioning hole 432, and at the same time the second driving member 313 drives the first clamping jaw 314 to rotate and lock the first substrate 43.

[0055] See also Figure 4 and Fig. 9 The first driving member 311 can be any one of a cylinder, a hydraulic cylinder, and a linear motor. The second driving member 313 can be a rotary motor or a rotary cylinder. The number of the first clamping jaws 314 can be two. The first clamping jaws 314 can be an L-shaped structure. The second driving member 313 is used to drive the first clamping jaws 314 to rotate. The rotation angle of the first clamping jaw 314 is 90°. When the second driving member 313 drives the first clamping jaw 314 to rotate to the side of the first substrate 43, the first substrate 43 can be restricted from moving upward, thereby locking the first substrate 43 of the mold 4. When the first clamping jaw 314 rotates to the side away from the first substrate 43, the first substrate 43 of the mold 4 can be unlocked.

[0056] See also Figure 6 and Fig. 9The first substrate 43 of the mold 4 is provided with first positioning holes 431 and second positioning holes 432 at intervals. The number of the first positioning holes 431 is two, the number of the second positioning holes 432 is two, and the two second positioning holes 432 are located outside the two first positioning holes 431 and do not interfere with each other.

[0057] See also Figure 2 The carrier 13 is provided with a first positioning pin 132 that matches the first positioning hole 431, and the support plate 312 is provided with a second positioning pin 315. The first driving member 311 drives the support plate 312 to lift the mold 4, so that the first positioning hole 431 on the first substrate 43 of the mold 4 can be moved out of the first positioning pin 132 of the carrier 13, and at the same time, the second positioning pin 315 of the support plate 312 is inserted into the second positioning hole 432 on the first substrate 43, so that the mold 4 can be accurately positioned at the working station. At the same time, the first clamping jaw 314 rotates and locks the first substrate 43 to prevent the mold 4 from deflecting during the lifting process.

[0058] Fig.10 Show Figure 8 Schematic diagram of the enlarged structure of area C in the middle. Fig.11 Show Fig.10 Schematic diagram of the local enlarged structure of area D in the middle.

[0059] In some embodiments, the second locking assembly 32 includes a third driving member 321 and a second clamp 322, a third positioning pin 22 is provided on the fixed plate 21, the third driving member 321 is fixedly connected to the fixed plate 21, the output end of the third driving member 321 is connected to the second clamp 322, and a third positioning hole 441 cooperating with the third positioning pin 22 is provided on the second substrate 44; when the mold 4 is positioned to the working station, the third positioning pin 22 passes through the third positioning hole 441, and at the same time, the third driving member 321 drives the second clamp 322 to rotate and lock the second substrate 44.

[0060] See also Figure 3 and Fig.10 In this embodiment, the third driving member 321 can be a rotating motor or a rotating cylinder. The number of the second clamping jaws 322 can be two, and the second clamping jaws 322 can be an L-shaped structure. The third driving member 321 is used to drive the second clamping jaws 322 to rotate. The rotation angle of the second clamping jaw 322 is 90°. When the third driving member 321 drives the second clamping jaw 322 to rotate to the side of the first substrate 43, the second substrate 44 can be restricted from moving downward, thereby locking the second substrate 44 of the mold 4. When the second clamping jaw 322 rotates to the side away from the first substrate 43, the second substrate 44 of the mold 4 can be unlocked.

[0061] See also Figure 7 and Fig.11A third positioning hole 441 is provided on the second substrate 44 of the mold 4, and a third positioning pin 22 is correspondingly provided on the fixed plate 21. When the first driving member 311 drives the supporting plate 312 to lift the mold 4, the third positioning pin 22 on the fixed plate 21 can be inserted into the third positioning hole 441; at the same time, when the third driving member 321 drives the second clamping jaw 322 to rotate to one side of the second substrate 44, the second substrate 44 can be restricted from moving downward, thereby locking the second substrate 44 of the mold 4 to prevent the movable mold 42 from shifting during the lifting process.

[0062] See also Figure 5 The hairpin wire 5 is formed into a "U"-shaped structure, which includes a bending portion 51 and straight portions 52 located at both ends of the bending portion 51. The two straight portions 52 are parallel to each other and located in the same plane. The bending portion 51 of the hairpin wire blank is located in the same plane as the straight portion 52 before stamping, and is bent after stamping. Since the straight portion 52 is relatively long, the portion of the straight portion 52 close to the bending portion 51 needs to be fixed before stamping the bending portion 51 to prevent the bending portion 51 from warping, deflecting, etc. during the stamping process and failing to be stamped into a preset shape.

[0063] To this end, in some embodiments, the movable mold 42 includes a first movable mold part 421 and a second movable mold part 422, the first movable mold part 421 is fixedly connected to the second substrate 44, the second movable mold part 422 is slidably connected to the first movable mold part 421, and the second substrate 44 is provided with a through hole 442 corresponding to the position of the second movable mold part 422; the stamping assembly 6 includes a fourth driving member 62 and a stamping head 61, the fourth driving member 62 is fixedly connected to the fixed plate 21, and the output end of the fourth driving member 62 is connected to the stamping head 61 to drive the movable mold 42 to approach or move away from the fixed mold 41; a part of the stamping head 61 passes through the through hole 442 to drive the second movable mold part 422 to press the straight portion 52 of the hairpin wire 5, and another part of the stamping head 61 is used to drive the second substrate 44 and the first movable mold part 421 to cooperate with the fixed mold 41 to form the bending portion 51 of the hairpin wire 5.

[0064] like Figure 5 and Fig.10 As shown, the second movable mold part 422 is slidably connected to the first movable mold part 421, and the two can be interlocked and provided with elastic parts. The fourth driving member 62 can be any one of a cylinder, a hydraulic cylinder, and a linear motor. The mold cavity on one side of the fixed mold 41 is used to carry the bending part 51 and part of the straight part 52 of the hairpin wire blank.

[0065] See also Figure 7After the first substrate 43 of the mold 4 is locked by the first locking assembly 31 and the second substrate 44 is locked by the second locking assembly 32, a part of the punch head 61 of the fourth driving member 62 passes through the through hole 442 of the second substrate 44, driving the second movable mold 422 to pre-match with the fixed mold 41 to crimp the straight portion 52, and another part of the punch head 61 drives the second substrate 44 and the first movable mold 421 to match with the fixed mold 41, so that the bending portion 51 of the hairpin wire blank can be stamped and formed, so that warping, deviation, etc. will not occur when the bending portion 51 is stamped and formed, and a preset shape is obtained by stamping.

[0066] Therefore, the stamping process of the stamping equipment in the embodiment of the present application is as follows: Step S1: placing various types of molds 4 on a plurality of carriers 13 of the material switching device 1, each carrier 13 cooperates with a first positioning hole 431 provided on a first substrate 43 of a corresponding mold 4 through a first positioning pin 132, so as to facilitate assembly and disassembly of the mold 4; Step S2: the rotating member 12 of the material switching device 1 rotates, and the mold 4 for forming a certain type of hairpin wire 5 is transported to the working station of the stamping equipment 100 through the carrier 13; Step S3: The first locking assembly 31 of the positioning assembly 3 of the stamping equipment 100 is used to lift the mold 4 to separate the mold 4 from the carrier 13, and at the same time lock the first base plate 43 of the mold 4, and the second locking assembly 32 is used to lock the second base plate 44 of the mold 4; Step S4: After the mold 4 is positioned at the working station, the first locking assembly 31 drives the assembly on one side of the fixed mold 41 of the mold 4 to descend, so that the fixed mold 41 is separated from the movable mold 42, and the hairpin wire blank is loaded into the mold cavity of the mold 4; Step S5: the punching head 61 of the punching assembly 6 of the punching equipment 100 drives the movable die 42 to approach the fixed die 41, a part of the punching head 61 drives the second movable die 422 to crimp the straight portion 52 of the hairpin wire 5, and another part of the punching head 61 drives the first movable die 421 to punch the bent portion 51 of the hairpin wire 5, thereby completing one punching operation.

[0067] If it is necessary to replace other molds 4 to produce other types of hairpin wires 5, the operation steps are as follows: Step S1 ′: first unload the mold 4 in the stamping equipment 100 to switch the mold 4 from the working station and position it on the carrier 13 ; Step S2 ′: the rotating member 12 of the material switching device 1 rotates, and the mold 4 for forming other types of hairpin wires 5 is transported to the working station of the stamping equipment 100 through another carrier 13 .

[0068] If the mold 4 for forming other types of hairpin wires 5 is not loaded onto the carrier 13 of the material switching device 1, the mold 4 for forming other types of hairpin wires 5 can be replaced with the mold 4 on any carrier 13 by means of a forklift or other tool. Since the mold 4 and the carrier 13 are only matched by the first positioning pin 132 and the first positioning hole 431, the mold 4 can be quickly assembled and disassembled, thereby improving production efficiency.

[0069] Fig.12 A structural schematic diagram of a hairpin wire production line provided in an embodiment of the present application is shown.

[0070] See also Fig.12 The hairpin wire production line provided in the embodiment of the present application includes: the stamping equipment 100 and the loading and unloading assembly 200 of each embodiment of the present application, the loading and unloading assembly 200 runs through the working station of the stamping equipment 100, and the loading and unloading assembly 200 is used to load the hairpin wire blank to the mold 4 of the stamping equipment 100, or unload the formed hairpin wire 5 from the mold 4. The loading and unloading assembly 200 can automatically load and unload the stamping equipment 100, further improving the automation degree of the stamping equipment 100.

[0071] In some embodiments, the loading and unloading assembly 200 includes a limit plate 201, a transmission assembly and a tray 202. The limit plate 201 is arranged on one side of the working station and the mold 4 is arranged at intervals. The transmission assembly is arranged on the side of the limit plate 201 away from the mold 4. One end of the tray 202 is connected to the transmission assembly, and the other end is slidably connected to the limit plate 201. One end of the tray 202 is connected to the transmission assembly, and the other end is slidably connected to the limit plate. The transmission assembly drives the tray 202 to move along the limit plate 201. The tray 202 is used to carry the hairpin wire blank or the formed hairpin wire 5.

[0072] Optionally, the transmission component can be a conveyor belt component or a conveyor chain component. The tray 202 is provided with a receiving groove for accommodating the hairpin wire blank or the hairpin wire 5. The hairpin wire blank is placed on the tray 202 at the previous station before arriving at the working station. When the transmission component drives the tray 202 to move to the working station, the stamping operation is performed, and then the transmission component drives the tray 202 out of the working station, thereby unloading the formed hairpin wire 5 to the next station.

[0073] The hairpin wire production line provided in the embodiment of the present application adopts the stamping equipment 100 and the loading and unloading assembly 200 as described above. By applying the material switching device 1 to the production of hairpin wires, a variety of different molds can be automatically switched to produce different hairpin wires, saving time for manual mold replacement. At the same time, the loading and unloading assembly 200 can automatically load and unload materials, with a high degree of automation, further accelerating the production rhythm, which is conducive to improving production efficiency.

[0074] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0075] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0076] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0077] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A material switching device, characterized in that: include: Pedestal; A fixing member fixedly connected to the base, wherein the fixing member is provided with a cam groove, wherein the cam groove comprises an arc groove and a reducing groove connected to each other, wherein the maximum distance between the distal end of the central contour line of the reducing groove and the center of the arc groove is greater than the radius of the central contour line of the arc groove; A rotating member, located between the base and the fixed member, and rotatably connected to the base; as well as At least two carriers are arranged at intervals along the circumference of the rotating member, and the carriers are movably connected to the rotating member, one end of the carrier is provided with a cam that cooperates with the cam groove, and the carrier is used to carry the target material; When the rotating member drives at least two of the carriers to rotate, the cam of any one of the carriers moves along the cam groove, and when the cam moves to the distal end of the reducing groove, the carrier is pushed to move in a direction away from the rotation center of the rotating member to transport the target material to the work station.

2. The material switching device according to claim 1, characterized in that: The central contour line of the variable diameter groove and the central contour line of the arc groove are tangent to each other at the connection point, and the central angle of the arc groove has a value range of 270° to 290°.

3. The material switching device according to claim 1, characterized in that: The carrier is detachably connected to the target material.

4. The material switching device according to claim 3, characterized in that: A first positioning pin is disposed at one end of the carrier away from the cam, and a first positioning hole matching with the first positioning pin is disposed on the target material.

5. The material switching device according to claim 1, characterized in that: The material switching device further comprises a plurality of moving mechanisms, wherein the plurality of moving mechanisms correspond one-to-one to the plurality of carriers, and the carriers are movably connected to the rotating member via the moving mechanisms.

6. The material switching device according to claim 5, characterized in that: The moving mechanism comprises a guide rail and a slider slidably connected to the guide rail, the guide rail extends along the radial direction of the rotating member and is fixedly connected to the rotating member, and the slider is connected to the carrier.

7. The material switching device according to claim 1, characterized in that: The material switching device also includes an in-situ detection component, which includes a support frame and a position sensor connected to the support frame, the support frame is connected to the fixing member, and the position sensor is arranged toward the working station.

8. The material switching device according to claim 1, characterized in that: The rotating member is provided with a plurality of weight-reducing holes at intervals along its circumference.

9. A stamping device, characterized in that: include: A base having a work station and a fixed plate located above the work station; The material switching device according to any one of claims 1 to 8, wherein the base of the material switching device is connected to the base; At least two molds, the molds are detachably connected to the carrier of the material switching device so as to transport the molds to the working station, and the molds have a mold cavity for accommodating a hairpin wire blank; A positioning assembly is movably connected to the base, and when the material switching device transports the mold to the working station, the positioning assembly is used to switch the mold from the carrier and position it to the working station; as well as A stamping assembly is connected to the fixing plate, and is used for stamping the hairpin wire blank into a hairpin wire after the mold is positioned at the working station.

10. The punching device according to claim 9, characterized in that The mold comprises a first substrate, a fixed mold, a movable mold and a second substrate, the fixed mold is connected to the first substrate, the movable mold is connected to the second substrate, and the movable mold and the fixed mold are movably connected to form the mold cavity; The positioning assembly includes a first locking assembly and a second locking assembly, wherein the first locking assembly is located below the working station, and the second locking assembly is connected to the fixed plate. When the mold reaches the working station, the first locking assembly is used to lift the mold so that the mold is detached from the carrier and locks the first substrate of the mold at the same time, and the second locking assembly is used to lock the second substrate of the mold.

11. The punching device according to claim 10, characterized in that The first locking assembly includes a first driving member, a support plate, a second driving member and a first clamping claw, the first driving member is fixedly connected to the first clamping claw, the output end of the first driving member is connected to the support plate, a second positioning pin is provided on the support plate, the second driving member is fixedly connected to the support plate, and the output end of the second driving member is connected to the first clamping claw; The first substrate is provided with a first positioning hole and a second positioning hole at intervals, and the carrier is provided with a first positioning pin that cooperates with the first positioning hole. When the mold arrives at the working station, the first driving member drives the support plate to lift the mold so that the first positioning hole is disengaged from the first positioning pin, and the second positioning pin passes through the second positioning hole, and at the same time the second driving member drives the first clamp to rotate and lock the first substrate.

12. The punching device according to claim 10, characterized in that The second locking assembly includes a third driving member and a second clamping claw, the fixing plate is provided with a third positioning pin, the third driving member is fixedly connected to the fixing plate, the output end of the third driving member is connected to the second clamping claw, and the second base plate is provided with a third positioning hole matched with the third positioning pin; When the mold is positioned at the working station, the third positioning pin passes through the third positioning hole, and at the same time, the third driving member drives the second clamping jaw to rotate and lock the second substrate.

13. The punching device according to claim 10, characterized in that The movable mold comprises a first movable mold part and a second movable mold part connected to each other, the first movable mold part is fixedly connected to the second substrate, the second movable mold part is slidably connected to the first movable mold part, and the second substrate is provided with a through hole at a position corresponding to the second movable mold part; The stamping assembly includes a fourth driving member and a stamping head, wherein the fourth driving member is fixedly connected to the fixed plate, and the output end of the fourth driving member is connected to the stamping head to drive the movable mold to approach or move away from the fixed mold, wherein a part of the stamping head passes through the through hole and drives the second movable mold member to press against the straight portion of the hairpin wire, and another part of the stamping head is used to drive the second substrate and the first movable mold member to cooperate with the fixed mold to form the bent portion of the hairpin wire.

14. A production line for producing a card-issuing conductor, characterized in that: include: A stamping device as claimed in any one of claims 9 to 13; and The loading and unloading assembly is arranged throughout the working station of the stamping equipment, and is used to load the hairpin wire blank to the mold of the stamping equipment, or unload the formed hairpin wire from the mold.

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