Material switching device, stamping equipment and production line of hairpin lead

Abstract

This application belongs to the technical field of motor assembly, and relates to a material switching device, a stamping device, and a hairpin wire production line. The material switching device includes: a base; a fixing member provided with a cam groove, the cam groove including an arc groove and a variable diameter groove; a rotating member located between the base and the fixing member and rotatably connected to the base; and at least two carriers spaced circumferentially along the rotating member, and the carriers are movably connected to the rotating member. A cam cooperating with the cam groove is provided at one end of the carrier, and the carrier is used for carrying a target material. Wherein, when the rotating member drives at least two carriers to rotate, the cam of any one carrier moves along the cam groove, and when the cam moves to the far end of the variable diameter groove, it pushes the carrier to move in a direction away from the rotation center of the rotating member, so as to transport the target material to the working station. This application can automatically switch multiple different molds to produce different hairpin wires, save the time for manual mold replacement, speed up the production rhythm, and is beneficial to improving production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of motor assembly, and particularly to a material switching device, a stamping device, and a hairpin wire production line. Background Art

[0002] As the drive motor of future new energy vehicles, the stator winding of the flat wire motor is wound with a wire having a rectangular cross-sectional shape. Compared with the round wire motor with a traditional round wire cross-sectional shape, more wires can be inserted into the stator slot of the same area, thereby improving the power density. Thus, in the case of the same volume, the flat wire motor can accommodate 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 vehicle drive motors in terms of miniaturization and light weight.

[0003] Currently, 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. Among them, the bent portion is formed into a preset shape by a stamping mechanism. The two straight portions are parallel to each other and are respectively located at both ends of the bent portion, forming a "U" - shaped structure. Since the structures and sizes of the hairpin wires required for different specifications of flat wire motors are different, when the stamping mechanism on the production line stamps different hairpin wires, it is necessary to manually replace different stamping dies, which wastes the production beat and has low production efficiency. Summary of the Invention

[0004] The purpose of the present application is to provide a material switching device, a stamping device, and a hairpin wire production line, which can automatically switch a variety of different dies to produce different hairpin wires, save the time for manual die replacement, speed up the production beat, and is beneficial to improving production efficiency.

[0005] In a first aspect, an embodiment of the present application provides a material switching device, including: a base; a fixing member fixedly connected to the base, with a cam groove provided on the fixing member. The cam groove includes an arc groove and a variable - diameter groove connected to each other. The maximum distance between the distal end of the central contour line of the variable - diameter 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 fixing member and rotatably connected to the base; and at least two carriers spaced along the circumferential direction of the rotating member and movably connected to the rotating member. A cam cooperating with the cam groove is provided at one end of the carrier, and the carrier is used for carrying a target material; 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 variable - diameter groove, it pushes the carrier to move in a direction away from the rotation center of the rotating member to transport the target material to the working station.

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

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

[0008] In a possible implementation, a first positioning pin is provided at one end of the vehicle away from the cam, and a first positioning hole for cooperating 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 to the plurality of vehicles one by one, and the vehicle is movably connected to the rotating member through the moving mechanism.

[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 vehicle.

[0011] In a possible implementation, the material switching device further includes an in-position detection component. The in-position detection component includes a support frame and a position sensor connected to the support frame. The support frame is connected to the fixed member, and the position sensor faces the working station.

[0012] In a possible implementation, a plurality of weight-reducing holes are provided at intervals along the circumferential direction of the rotating member.

[0013] In a second aspect, an embodiment of the present application provides a stamping device, including: a base having a working station and a fixing plate located above the working station; the material switching device of each embodiment of the present application, the base of the material switching device is connected to the base; at least two molds, the molds are detachably connected to the vehicles of the material switching device to transport the molds to the working station, and the molds have cavities for accommodating the blank parts of the hairpin wires; a positioning component movably connected to the base, when the material switching device transports the molds to the working station, the positioning component is used to switch and position the molds from the vehicles to the working station; and a stamping component connected to the fixing plate, the stamping component is used to stamp the blank parts of the hairpin wires into hairpin wires after the molds are positioned at the working station.

[0014] In a possible implementation, the mold includes a first substrate, a stationary mold, a moving mold and a second substrate. The stationary mold is fixedly connected to the first substrate, the moving mold is fixedly connected to the second substrate, and the moving mold is movably connected to the stationary mold and forms a cavity; the positioning component includes a first locking component and a second locking component. The first locking component is located below the working station, and the second locking component is connected to the fixing plate; when the mold reaches the working station, the first locking component is used to lift the mold to disengage the mold from the vehicle, and at the same time lock the first substrate of the mold, and the second locking component is used to lock the second substrate of the mold.

[0015] In a possible implementation, the first locking assembly includes a first driving member, a support plate, a second driving member, and a first jaw. 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 arranged 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 jaw. First positioning holes and second positioning holes are arranged at intervals on the first substrate, and the carrier is provided with a first positioning pin that cooperates with the first positioning holes. When the mold reaches the working station, the first driving member drives the support plate to lift the mold, so that the first positioning holes are disengaged from the first positioning pins, and the second positioning pins penetrate the second positioning holes. At the same time, the second driving member drives the first jaw to rotate and lock the first substrate.

[0016] In a possible implementation, the second locking assembly includes a third driving member and a second jaw. A third positioning pin is arranged on the fixing plate. The third driving member is fixedly connected to the fixing plate, and the output end of the third driving member is connected to the second jaw. A third positioning hole that cooperates with the third positioning pin is arranged on the second substrate. When the mold is positioned at the working station, the third positioning pin penetrates the third positioning hole. At the same time, the third driving member drives the second jaw to rotate and lock the second substrate.

[0017] In a possible implementation, the moving mold includes a first moving mold member and a second moving mold member that are connected to each other. The first moving mold member is fixedly connected to the second substrate, the second moving mold member is slidably connected to the first moving mold member, and a through hole is arranged on the second substrate corresponding to the position of the second moving mold member. The stamping assembly includes a fourth driving member and a stamping head. The fourth driving member is fixedly connected to the fixing plate, and the output end of the fourth driving member is connected to the stamping head to drive the moving 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 moving 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 moving mold member to cooperate with the fixed mold to form the bent portion of the hairpin wire.

[0018] In a third aspect, an embodiment of the present application provides a hairpin wire production line, including: the stamping equipment of each embodiment of the present application; and a loading and unloading assembly that is arranged through the working stations of the stamping equipment. The loading and unloading assembly is used to load the hairpin wire blank into the mold of the stamping equipment or unload the formed hairpin wire from the mold.

[0019] According to the material switching device, stamping equipment and production line of hairpin leads provided by the embodiments of the present application, the material switching device includes a base, a fixing member fixedly connected to the base, a rotating member rotatably connected to the base, and at least two carriers arranged at intervals along the circumference of the rotating member, and the carriers are movably connected to the rotating member. By providing a cam groove on the fixing member and a cam cooperating with the cam groove at one end of the carrier, the carrier is used to carry the target material. When the rotating member drives at least two carriers to rotate, the cam of any carrier moves along the cam groove. The cam groove includes an arc groove and a variable diameter groove. When the cam moves to the distal end of the variable diameter groove, it pushes the carrier to move radially away from the rotating member to transport the target material to the working station. Thus, according to the working principle of the cam moving along the cam groove, by designing that the rotation radius of the cam groove changes at the working station, the required target material can be automatically moved to the working station. When it is necessary to replace other target materials, only need to transport other target materials to the working station through the carrier, without manual handling of the target material. Applying this material switching device to the production of hairpin leads can automatically switch multiple different molds to produce different hairpin leads, saving the time of manual mold replacement, accelerating the production rhythm, and being beneficial to improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 Shows a three-dimensional structural schematic diagram of the material switching device provided by the embodiments of the present application;

[0022] Figure 2 Shows Figure 1 The top view structural schematic diagram of the shown material switching device;

[0023] Figure 3 Shows a structural schematic diagram of the stamping equipment provided by the embodiments of the present application;

[0024] Figure 4 Shows Figure 3 The partial enlarged structural schematic diagram of area A in;

[0025] Figure 5 Shows Figure 3 The assembly structural schematic diagram of the mold and the hairpin lead in the stamping equipment;

[0026] Figure 6 Shows Figure 5 The structural schematic diagram of the first substrate of the mold in;

[0027] Figure 7 Shows Figure 5 Schematic structural diagram of the second substrate of the mold in

[0028] Figure 8 Shows the view along Figure 3 Schematic structural diagram seen in the direction M in

[0029] Figure 9 Shows the view along Figure 8 Enlarged schematic structural diagram of area B in

[0030] Figure 10 Shows the view along Figure 8 Enlarged schematic structural diagram of area C in

[0031] Figure 11 Shows Figure 10 Partially enlarged schematic structural diagram of area D in

[0032] Figure 12 Schematic structural diagram of the hairpin wire production line provided by the embodiment of the present application.

[0033] Each label in the drawings represents as follows:

[0034] 100, stamping equipment; 200, loading and unloading assembly; 201, limiting plate; 202, tray;

[0035] 1, material switching device;

[0036] 10, base; 11, fixing member; 111, cam groove; 111a, arc groove; 111b, variable diameter groove;

[0037] 12, rotating member; 121, weight reduction hole;

[0038] 13, carrier; 131, cam; 132, first positioning pin;

[0039] 14, moving mechanism; 141, guide rail; 142, slider; 15, position detection component; 151, support frame; 151a, first rod; 151b, second rod; 152, position sensor;

[0040] 2, base; 21, fixing plate; 22, third positioning pin;

[0041] 3, positioning component; 31, first locking component; 311, first driving member; 312, support plate; 313, second driving member; 314, first jaw; 315, second positioning pin; 32, second locking component; 321, third driving member; 322, second jaw;

[0042] 4. Mold; 43. First substrate; 431. First positioning hole; 432. Second positioning hole; 41. Fixed mold; 42. Movable mold; 421. First movable mold part; 422. Second movable mold part; 44. Second substrate; 441. Third positioning hole; 442. Through hole;

[0043] 5. Hairpin wire; 51. Bent part; 52. Straight part;

[0044] 6. Stamping assembly; 61. Stamping head; 62. Fourth driving part. Detailed implementation manners

[0045] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0046] Figure 1 The three-dimensional structural schematic diagram of the material switching device provided by the embodiment of the present application is shown. Figure 2 Shown Figure 1 The top-view structural schematic diagram of the material switching device shown.

[0047] Refer to Figure 1 And Figure 2 The material switching device 1 provided by the embodiment of the present application includes a base 10, a fixing part 11, a rotating part 12 and at least two carriers 13.

[0048] The fixing part 11 is fixedly connected to the base 10. A cam groove 111 is provided on the fixing part 11. The cam groove 111 includes an arc groove 111a and a variable-diameter groove 111b which are connected to each other. The maximum distance between the distal end of the central contour line of the variable-diameter groove 111b and the center of the arc groove 111a is greater than the radius of the central contour line of the arc groove 111a. Optionally, the fixing part 11 is a disc-shaped structural member, which has a simple structure, occupies a small space and is convenient for processing.

[0049] The rotating part 12 is located between the base 10 and the fixing part 11 and is rotatably connected to the base 10. Optionally, the rotating part 12 is a disc-shaped structural member, which has a simple structure, occupies a small space and is convenient for processing. In addition, the diameter of the rotating part 12 is greater than the diameter of the fixing part 11 to facilitate the setting of the carrier 13 on the rotating part 12.

[0050] At least two carriers 13 are arranged at intervals along the circumferential direction of the rotating member 12, and the carrier 13 is movably connected to the rotating member 12. One end of the carrier 13 is provided with a cam 131 that cooperates with the cam groove 111, and the carrier 13 is used to carry the target material.

[0051] Wherein, when the rotating member 12 drives at least two carriers 13 to rotate, the cam 131 of any one carrier 13 moves along the cam groove 111, and when the cam 131 moves to the distal end of the variable diameter groove 111b, it pushes the carrier 13 to move in a direction away from the rotation center of the rotating member 12, so as to transport the target material to the working station.

[0052] In this embodiment, the cam groove 111 includes an arc groove 111a and a variable diameter groove 111b, and the maximum distance between the distal end of the center contour line of the variable diameter 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. As Figure 2 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 member 11, the radius of the arc groove 111a remains unchanged. During the process that the carrier 13 moves 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 member 12, so that the target material rotates smoothly. The distance between the center contour line of the variable diameter 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 member 12. Among them, the maximum distance between the distal end of the center contour line of the variable diameter 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 member 12.

[0053] In one example, the number of carriers 13 is three, and the three carriers 13 are arranged at equal angular intervals along the circumferential direction of the rotating member 12. The number of carriers 13 can also be two or four or more, depending on the 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 working station through the carriers 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 type of target material is completed and other target materials need to be replaced, the other target materials can be transported to the working station through the carriers 13, reducing the time for manual replacement of the target materials.

[0054] According to the material switching device provided by the embodiments of the present application, it includes a base 10, a fixing member 11 fixedly connected to the base 10, a rotating member 12 rotatably connected to the base 10, and at least two carriers 13 arranged at intervals along the circumferential direction of the rotating member 12. The carrier 13 is movably connected to the rotating member 12. By providing a cam groove 111 on the fixing member 11 and a cam 131 cooperating with the cam groove 111 at one end of the carrier 13, the carrier 13 is used to carry the target material. When the rotating member drives at least two carriers 13 to rotate, the cam 131 of any carrier 13 moves along the cam groove 111. The cam groove 111 includes an arc groove 111a and a variable diameter groove 111b. When the cam 131 moves to the distal end of the variable diameter groove 111b, it pushes the carrier 13 to move in a direction away from the rotation center of the rotating member 12, so as to transport the target material to the working station. Thus, according to the working principle of the cam 131 moving along the cam groove 111, by designing that the rotation radius of the cam groove 111 changes at the working station, the required target material can be automatically moved to the working station. When it is necessary to replace other target materials, only need to transport other target materials to the working station through the carrier 13, without manually carrying the target material. Applying this material switching device to the production of hairpin wires can automatically switch multiple different molds to produce different hairpin wires, saving the time of manually replacing molds, accelerating the production rhythm, and being beneficial to improving production efficiency.

[0055] In some embodiments, the central contour line of the variable diameter groove 111b is tangent to the central contour line of the arc groove 111a at the connection, and the value range of the central angle of the arc groove is 270° - 290°. In one example, the central angle of the arc groove is 280°. In this way, the included angle θ formed by the central contour line of the variable diameter groove 111b and the central contour line of the arc groove 111a being tangent at the connection is 100°. Such a setting can reserve a suitable space for the carrier 13 to move radially along the rotating member 12. The included angle θ can also be other values, depending on the distance that the carrier 13 moves radially along the rotating member 12.

[0056] In addition, the central contour line of the variable diameter groove 111b is tangent to the central contour line of the arc groove 111a at the connection, which can enable the carrier 13 to drive the target material to smoothly transition from the arc groove 111a to the variable diameter groove 111b, preventing the target material from shifting during rotation.

[0057] In some embodiments, the carrier 13 is detachably connected to the target material.

[0058] When there are enough types of target materials and they cannot be all placed on the rotating member 12 at the same time, the carrier 13 can be detachably connected to the target material to improve the efficiency of replacing the target material. A forklift can be used to replace the target material, or it can be replaced manually.

[0059] In some embodiments, a first positioning pin 132 is provided at one end of the carrier 13 away from the cam 131, and a first positioning hole 431 that cooperates with the first positioning pin 132 is provided on the target material.

[0060] As Figure 1 shown, two first positioning pins 132 are spaced apart at one end of the carrier 13 away from the cam 131. Correspondingly, two first positioning holes 431 are provided on the target material. The carrier 13 and the target material are quickly disassembled and assembled through the cooperation of the first positioning pin 132 and the first positioning hole 431, improving the efficiency of replacing the target material.

[0061] In some embodiments, the material switching device 1 further includes a plurality of moving mechanisms 14. The plurality of moving mechanisms 14 correspond to the plurality of carriers 13 one by one, and the carrier 13 is movably connected to the rotating member 12 through the moving mechanism 14. This moving mechanism 14 does not require an additional driving source to drive. Based on the working principle of the cam 131 moving along the cam groove 111, the carrier 13 can automatically push the target material to move to the working station.

[0062] 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 further include rollers and a slide rail, and the carrier 13 is moved by rolling, which will not be elaborated here.

[0063] In some embodiments, the material switching device 1 further includes an in-position detection component 15. The in-position detection component 15 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 facing the working station.

[0064] As Figure 1 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 is arranged facing 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, facilitating the next process. The support frame 151 is arranged at a position of the fixing member 11 close to the variable diameter groove 111b, which can shorten the length of the second rod 151b as much as possible.

[0065] In some embodiments, a plurality of weight reduction holes 121 are provided at intervals along the circumferential direction of the rotating member 12. AsFigure 2 As shown, six weight-reducing holes 121 are arranged at intervals along the circumferential direction of the rotating member 12, and the carrier 13 is arranged between two adjacent weight-reducing holes 121. The number of the weight-reducing holes 121 can also be any number such as three or four. The weight-reducing holes 121 can reduce the weight of the rotating member 12 and improve the stiffness and strength of the rotating member 12.

[0066] 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 stepping motor. The motor drives the reducer to drive the rotating member 12 to rotate so as to transport the target material to the working station.

[0067] Figure 3 The structural schematic diagram of the stamping equipment provided by the embodiment of the present application is shown.

[0068] Refer to Figure 3 , the embodiment of the present application provides a stamping equipment 100, including the material switching device 1, the base 2, the positioning assembly 3, at least two molds 4 and the stamping assembly 6 provided by each embodiment of the present application.

[0069] The base 2 has a working station and a fixing plate 21 located above the working 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 working station. The mold 4 has a cavity for accommodating the blank of the hairpin lead.

[0070] 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 and position the mold 4 from the carrier 13 to the working station.

[0071] The stamping assembly 6 is connected to the fixing plate 21. The stamping assembly 6 is used to stamp the blank of the hairpin lead into the hairpin lead 5 after the mold 4 is positioned at the working station.

[0072] In this embodiment, the target material is the mold 4, and the mold 4 has a cavity for accommodating the blank of the hairpin wire. Since there are various types of hairpin wires 5 and the sizes of different types of hairpin wires 5 are different, correspondingly, 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 move the required mold 4 to the working station automatically through the carrier 13 as the cam 131 moves along the cam groove 111. When other molds 4 need to be replaced, only need to transport other molds 4 to the working station through the carrier 13, without manual handling of the mold 4. Then the positioning component 3 switches and positions the mold 4 from the carrier 13 to the working station, and the stamping component 6 stamps the blank of the hairpin wire into the hairpin wire 5. The positioning component 3 can prevent the mold 4 from shifting or tipping during the stamping operation, improving the assembly stability of the mold 4. Thus, the material switching device 1 can automatically switch multiple different molds 4 to produce different hairpin wires 5, saving the time for manual mold replacement, accelerating the production rhythm, and being beneficial to improving production efficiency.

[0073] Figure 4 Shows Figure 3 The partial enlarged structural schematic diagram of area A in Figure 5 Shows Figure 3 The assembly structural schematic diagram of the mold and the hairpin wire in the stamping equipment in Figure 6 Shows Figure 5 The structural schematic diagram of the first substrate of the mold in Figure 7 Shows Figure 5 The structural schematic diagram of the second substrate of the mold in

[0074] In some embodiments, the mold 4 includes a first substrate 43, a stationary mold 41, a movable mold 42 and a second substrate 44. The stationary 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 is movably connected to the stationary mold 41 to form a cavity. The positioning component 3 includes a first locking component 31 and a second locking component 32. The first locking component 31 is located below the working station, and the second locking component 32 is connected to the fixing plate 21. When the mold 4 reaches the working station, the first locking component 31 is used to lift the mold 4 to disengage the mold 4 from the carrier 13, and at the same time lock the first substrate 43 of the mold 4, and the second locking component 32 is used to lock the second substrate 44 of the mold 4.

[0075] Refer to Figures 4 to 7When the mold 4 is transported to the working station by the material switching device 1, the first locking assembly 31 jacks up the mold 4 by a first distance so that the mold 4 is disengaged from the carrier 13. At the same time, the first locking assembly 31 locks the first substrate 43 of the mold 4, and the second locking assembly 32 locks the second substrate 44 of the mold 4 to position the mold 4 at the working station. After the first locking assembly 31 drives the first substrate 43 and the fixed mold 41 to descend by a second distance, the moving mold 42 is separated from the fixed mold 41. At this time, the blank hairpin wire can be placed in the mold cavity, and the second distance is less than the first distance.

[0076] Figure 8 Shows the structure as viewed along Figure 3 the direction M in Figure 9 shows Figure 8 the enlarged structure of area B in

[0077] 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 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, a second positioning pin 315 is arranged on the support plate 312, 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 jaw 314. First positioning holes 431 and second positioning holes 432 are arranged at intervals on the first substrate 43, and the carrier 13 is provided with a first positioning pin 132 that cooperates with the first positioning hole 431. When the mold 4 reaches the working station, the first driving member 311 drives the support plate 312 to jack up 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. At the same time, the second driving member 313 drives the first jaw 314 to rotate and lock the first substrate 43.

[0078] Refer to Figure 4 and Figure 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 rotating motor or a rotating cylinder. The number of the first jaws 314 can be two. The first jaw 314 can be an L-shaped structure. The second driving member 313 is used to drive the first jaw 314 to rotate. The rotation angle of the first jaw 314 is 90°. When the second driving member 313 drives the first jaw 314 to rotate to one side of the first substrate 43, it can limit the upward movement of the first substrate 43, thereby locking the first substrate 43 of the mold 4. When the first jaw 314 rotates to the side away from the first substrate 43, the first substrate 43 of the mold 4 can be unlocked.

[0079] Refer to Figure 6 and Figure 9, on the first substrate 43 of the mold 4, a first positioning hole 431 and a second positioning hole 432 are arranged at intervals. The number of the first positioning holes 431 is two, and 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.

[0080] Refer to Figure 2 , the carrier 13 is provided with a first positioning pin 132 that cooperates with the first positioning hole 431, and the support plate 312 is provided with a second positioning pin 315. By driving the support plate 312 to lift the mold 4 through the first driving member 311, the first positioning hole 431 on the first substrate 43 of the mold 4 can be removed from the first positioning pin 132 of the carrier 13. 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 to the working station. At the same time, the first clamping jaw 314 rotates and locks the first substrate 43, which can prevent deviation during the process of lifting the mold 4.

[0081] Figure 10 Show Figure 8 The enlarged structural schematic diagram of area C in Figure 11 Show Figure 10 The partial enlarged structural schematic diagram of area D in

[0082] In some embodiments, the second locking assembly 32 includes a third driving member 321 and a second clamping jaw 322. The fixing plate 21 is provided with a third positioning pin 22. The third driving member 321 is fixedly connected to the fixing plate 21, and the output end of the third driving member 321 is connected to the second clamping jaw 322. The second substrate 44 is provided with a third positioning hole 441 that cooperates with the third positioning pin 22; when the mold 4 is positioned to the working station, the third positioning pin 22 penetrates through the third positioning hole 441, and at the same time, the third driving member 321 drives the second clamping jaw 322 to rotate and lock the second substrate 44.

[0083] Refer to Figure 3 And Figure 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, the second clamping jaws 322 can be of an L-shaped structure, and the third driving member 321 is used to drive the second clamping jaws 322 to rotate. The rotation angle of the second clamping jaws 322 is 90°. When the third driving member 321 drives the second clamping jaws 322 to rotate to one side of the first substrate 43, it can limit the downward movement of the second substrate 44, so as to lock the second substrate 44 of the mold 4. When the second clamping jaws 322 rotate to the side away from the first substrate 43, the second substrate 44 of the mold 4 can be unlocked.

[0084] Refer to Figure 7 And Figure 11, a 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 fixing plate 21. When the first driving member 311 drives the support plate 312 to lift the mold 4, the third positioning pin 22 on the fixing plate 21 can be inserted into the third positioning hole 441. At the same time, when the third driving member 321 drives the second jaw 322 to rotate to one side of the second substrate 44, it can limit the downward movement of the second substrate 44, thereby locking the second substrate 44 of the mold 4 and preventing the moving mold 42 from shifting during the lifting process.

[0085] Refer to Figure 5 , the hairpin wire 5 is formed into a "U" - shaped structure, which includes a bent portion 51 and straight portions 52 located at both ends of the bent portion 51. The two straight portions 52 are parallel to each other and are located in the same plane. The bent portion 51 of the hairpin wire blank is in the same plane as the straight portions 52 before stamping and bends after stamping. Since the straight portions 52 are relatively long, before stamping the bent portion 51, the portion of the straight portion 52 close to the bent portion 51 needs to be fixed first to prevent the bent portion 51 from warping, shifting, etc. during the stamping process and thus being unable to be stamped into the preset shape.

[0086] For this reason, in some embodiments, the moving mold 42 includes a first moving mold member 421 and a second moving mold member 422. The first moving mold member 421 is fixedly connected to the second substrate 44, the second moving mold member 422 is slidably connected to the first moving mold member 421, and a through - hole 442 is provided on the second substrate 44 corresponding to the position of the second moving mold member 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 fixing plate 21, and the output end of the fourth driving member 62 is connected to the stamping head 61 to drive the moving 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 moving mold member 422 to press against 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 moving mold member 421 to cooperate with the fixed mold 41 to form the bent portion 51 of the hairpin wire 5.

[0087] As Figure 5 and Figure 10 shown, the second moving mold member 422 is slidably connected to the first moving mold member 421, and they can be mutually engaged and are provided with an elastic member. 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 bent portion 51 and part of the straight portion 52 of the hairpin wire blank.

[0088] Refer to Figure 7, after 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 die member 422 to pre-fit and press the straight portion 52 of the fixed die 41. Another part of the punch head 61 drives the second substrate 44 and the first movable die member 421 to cooperate with the fixed die 41, and can stamp and form the bent portion 51 of the hairpin wire blank. In this way, warping, offset, etc. will not occur during the stamping and forming of the bent portion 51, so that a preset shape can be obtained by stamping.

[0089] Thus, the stamping process of the stamping device in the embodiment of the present application is as follows:

[0090] Step S1: Place various types of molds 4 on multiple carriers 13 of the material switching device 1. Each carrier 13 cooperates with the first positioning hole 431 provided on the first substrate 43 of the corresponding mold 4 through the first positioning pin 132, which is convenient for assembling and disassembling the mold 4;

[0091] Step S2: The rotating member 12 of the material switching device 1 rotates, and transports the mold 4 for forming a certain type of hairpin wire 5 to the working station of the stamping device 100 through the carrier 13;

[0092] Step S3: The first locking assembly 31 of the positioning assembly 3 of the stamping device 100 is used to lift the mold 4 so that the mold 4 is separated from the carrier 13, and at the same time lock the first substrate 43 of the mold 4. The second locking assembly 32 is used to lock the second substrate 44 of the mold 4;

[0093] Step S4: After the mold 4 is positioned at the working station, the first locking assembly 31 drives the component on the fixed die 41 side of the mold 4 to descend, so that the fixed die 41 is separated from the movable die 42, and the hairpin wire blank is loaded into the mold cavity of the mold 4;

[0094] Step S5: The punch head 61 of the stamping assembly 6 of the stamping device 100 drives the movable die 42 to approach the fixed die 41. A part of the punch head 61 drives the second movable die member 422 to press the straight portion 52 of the hairpin wire 5, and another part of the punch head 61 drives the first movable die member 421 to stamp the bent portion 51 of the hairpin wire 5, completing one stamping operation.

[0095] If it is necessary to replace other molds 4 to produce other types of hairpin wires 5, the operation steps are as follows:

[0096] Step S1': First unload the mold 4 in the stamping device 100 to switch and position the mold 4 from the working station to the carrier 13;

[0097] 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 .

[0098] 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.

[0099] Figure 12 A structural schematic diagram of a hairpin wire production line provided in an embodiment of the present application is shown.

[0100] See also Figure 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.

[0101] 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.

[0102] 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.

[0103] The production line of the hairpin wire provided by the embodiment of the present application adopts the stamping device 100 and the loading and unloading assembly 200 as described above. By applying the material switching device 1 to the production of hairpin wires, it can automatically switch multiple different molds to produce different hairpin wires, saving the 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 and being conducive to improving production efficiency.

[0104] It should be noted that phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures or characteristics with an embodiment, implementing such features, structures or characteristics in other embodiments, whether explicitly or implicitly described, is within the knowledge scope of those skilled in the art.

[0105] It should be easily understood that the terms "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 intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0106] In addition, for the convenience of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive words used in the text may be interpreted accordingly.

[0107] It should be noted that in this text, 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 actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and 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 stamping equipment, characterized in that: include: A base having a work station and a fixed plate located above the work station; Material switching device, including: A base, connected to the base; 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; and 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 matches with the cam groove, the carrier is used to carry the target material, the carrier and the target material are detachably connected, one end of the carrier away from the cam is provided with a first positioning pin, and the target material is provided with a first positioning hole that matches with the first positioning pin; When the rotating member drives at least two of the carriers to rotate, the cam of any of the carriers moves along the cam groove, and when the cam moves to the distal end of the diameter-changing 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 material to the work station; At least two molds, the mold is the target material, the mold includes 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, the movable mold and the fixed mold are movably connected to form a mold cavity for accommodating the hairpin wire blank; a positioning assembly, 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, and 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, and when the mold reaches the working station, the first locking assembly is used to lift the mold to separate 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; and 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.

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

3. The stamping equipment 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.

4. The punching equipment according to claim 3, 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.

5. The stamping equipment 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.

6. The punching equipment according to claim 1, characterized in that The rotating member is provided with a plurality of weight-reducing holes at intervals along its circumference.

7. The punching device according to claim 6, 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.

8. The punching equipment according to claim 6, 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.

9. The punching equipment according to claim 6, 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.

10. A production line for hairpin wires, characterized in that: include: The stamping device according to any one of claims 1 to 9; 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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