Electric power fitting U-shaped ring forming device

Abstract

The utility model discloses an electric power fitting U-shaped ring forming device which comprises a pressing pier mechanism, the pressing pier mechanism comprises a first machine frame, the first machine frame is connected with two sliding seats in a sliding mode, each sliding seat is connected with a pressing pier forming block in a sliding mode, the first machine frame is fixedly connected with a placing seat, the first machine frame is provided with a pressing seat, and the first machine frame is provided with a first material moving assembly. The material bearing and flattening mechanism can bear the bar from the two ends of the first material moving assembly after being pressed and piled and flatten the two ends of the bar after being pressed and piled; the material bearing and hole forming mechanism can bear the bar material with the two ends flattened by the material bearing and flattening mechanism and machine through holes in the two flattened ends of the bar material; and the material bearing and bending mechanism can bear the bar material with the through holes in the two ends machined by the material bearing and hole forming mechanism and bend the bar material from the middle. According to the U-shaped ring forming machine, the two ends of a bar can be machined into spheres with the uniform texture at a time through the pier pressing mechanism, and the U-shaped ring can be automatically manufactured through subsequent flattening, hole forming and bending.

Description

Technical Field

[0001] The utility model relates to the technical field of connection hardware processing devices, in particular to a U-shaped ring forming device for an electric hardware. Background Art

[0002] U-shaped rings are widely used as connecting hardware in power lines. Structurally, the U-shaped ring includes a flat end that is flattened into a circular or elliptical shape. The two flat ends have through holes for inserting screws, and the two flat ends are connected by a U-shaped hanging end. The U-shaped ring is processed in an integrated molding manner. Specifically, the rod needs to be processed through processes such as piercing, flattening, hole forming, and bending. During the piercing operation, the two ends of the round rod need to be processed into a spherical shape. If the cold piercing method is used, the two ends of the sphere are prone to lamination, that is, internal fractures occur and this phenomenon cannot be seen from the outside, affecting product quality and easily causing safety hazards during use. Existing hot piercing machines for piercing are mostly suitable for screw processing, that is, a round rod heated at one end is processed into a cylindrical boss at one time, while the piercing positions required for the U-shaped ring are at both ends of the rod and need to be processed into a spherical shape. The inventors discovered that each of the four steps—pressing, flattening, hole-forming, and bending—requires at least one operator. The operators also need to manually remove and unload the heated bar stock, which is time-consuming, labor-intensive, and poses a safety hazard. There is an urgent need for a U-shaped ring forming device for electrical hardware that can simultaneously process the heated bar stock into a uniform spherical shape and automatically produce the U-shaped ring. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an electric power hardware U-shaped ring forming device which can process both ends of heated bar material into uniform spherical shapes at one time and automatically make U-shaped rings.

[0004] In order to solve the above technical problems, the utility model includes a pressing mechanism, which includes a first frame, the first frame is slidably connected with two slides that can move closer to and away from each other in the left and right straight directions, each slide is slidably connected with a pressing forming block that can slide in the front and back straight directions, the pressing forming blocks are spaced apart with a first conical forming cavity and a second hemispherical forming cavity, the first frame is fixedly connected with a placement seat located between the two pressing forming blocks, the top of the placement seat has a downwardly recessed arc groove, the diameter of the arc groove of the placement seat is adapted to the diameter of the rod, the first frame is provided with a rod that can press the rod located on the arc groove of the placement seat The material is pressed by a pressing seat, and the bottom end of the pressing seat has an upwardly recessed arc-shaped groove, and the diameter of the arc-shaped groove of the pressing seat is adapted to the diameter of the rod. The first frame is provided with a first material moving assembly which can place the rod to be pressed onto the placement seat and remove the pressed rod on the placement seat. It also includes a material flattening mechanism which can receive the rods from both ends of the pressing from the first material moving assembly and flatten the two ends of the rods after the pressing, a material hole-forming mechanism which can receive the rods flattened at both ends by the material flattening mechanism and process through holes on both ends of the flattened rods, and a material bending mechanism which can receive the rods with through holes processed at both ends by the material hole-forming mechanism and bend the rods from the middle.

[0005] After adopting the above structure, the rods heated at both ends are placed on the placement seat through the first material moving assembly, and then the pressing seat presses the rods on the placement seat. At this time, the heated ends of the rods are exposed, and then the pressing block aligns the first forming cavity with the rod by sliding back and forth, and then the two slides slide left and right close to each other until the first forming cavity contacts the two ends of the rods. As the slides continue to slide, the heated left end of the rod is squeezed into a cone by the first forming cavity on the left, the left side of the placement seat, and the left side of the pressing seat. The heated right end of the rod is squeezed into a cone by the first forming cavity on the right, the right side of the placement seat, and the right side of the pressing seat. The two slides then move away from the bar stock, and the pier forming block aligns the second forming cavity with the bar stock by sliding back and forth. The two slides then slide left and right toward each other until the second forming cavity contacts both ends of the bar stock. As the slides continue to slide, the conical left end of the bar stock is squeezed into a spherical shape by the second forming cavity on the left, the left side of the placement seat, and the left side of the pressing seat. The conical right end of the bar stock is squeezed into a spherical shape by the second forming cavity on the right, the right side of the placement seat, and the right side of the pressing seat, completing the piercing of both ends of the bar stock. By forming the heated bar stock at both ends into a cone and a sphere in two steps, not only can the stacking problem caused by cold piercing be overcome, but the internal structure can also be made uniform and the accuracy of the forming of both ends of the bar stock is guaranteed. After the piercing is completed, the pressing seat releases the pressure on the bar stock on the placement seat, and the first material moving assembly removes the bar stock on the placement seat and places the heated bar stock at both ends that has not been pierced onto the placement seat. The material receiving and flattening mechanism receives the rod material from the two ends of the pressing pier of the first material moving assembly and flattens the two ends of the rod material after the pressing pier. The material receiving and hole-forming mechanism receives the rod material flattened at both ends by the material receiving and flattening mechanism and processes through holes on the two ends of the flattened rod material. Finally, the material receiving and bending mechanism receives the rod material with through holes processed at both ends by the material receiving and hole-forming mechanism and bends the rod material from the middle, thereby realizing the automatic production of U-shaped rings.

[0006] Furthermore, the first material moving assembly includes a mounting seat that can move up and down, and the mounting seat is provided with two material forks that can approach and move away from the placement seat in the front and rear directions. The left and right horizontal spacing of the two material forks is greater than the maximum left and right width of the placement seat and is not greater than the length of the bar material. The front part of the material fork is provided with a first material receiving frame for receiving the bar material, and the side of the material fork away from the first material receiving frame is provided with a material discharge tip with a height gradually decreasing from front to back, and the material fork is provided with a material blocking protrusion located between the first material receiving frame and the material discharge tip. The cam is provided with a first material guide frame which is inclined downward from the front to the back and is used to receive the rods from the material fork, and the front end of the first material guide frame is located below the material guide frame. By setting the first material moving assembly, the mounting seat moves up and down to drive the material fork to move up and down, and the discharge tip on the material fork can lift the bar on the placement seat upward by accompanying the material fork to move upward. Under the action of gravity, the bar rolls downward obliquely along the discharge tip to the first material guide rack; when it is necessary to place the bar on the placement rack, the bar heated at both ends is placed on the first material receiving rack by manual or automated equipment and one end of the bar is pressed against the limit rack, and then the push rack pushes the bar to make the bar roll into the limit groove, and the limit rack can not only adjust the left and right positions of the bar Finally, the material fork moves forward and resets, and the material blocking protrusion can prevent the bar pushed by the pushing frame from rushing out of the material limiting groove due to excessive speed.

[0007] Furthermore, the material receiving and flattening mechanism includes a first press, the first press is provided with a flattening lower die and a flattening upper die located above the flattening lower die, the first press can drive the flattening upper die to approach and move away from the flattening lower die in the up and down directions, the flattening lower die is provided with a forming groove, the flattening lower die and the flattening upper die are provided with a guide assembly, the top of the flattening lower die is provided with a plurality of first limiting columns located at the front of the forming groove near the middle position and capable of supporting the front side of the middle of the bar material, and also includes a first chain conveyor belt capable of receiving the bar material from the first material moving assembly and transferring the bar material from the first chain conveyor belt to the flattening lower die The chain conveyor belt is above the mold, and the first press is provided with a second guide rack for receiving the rods from the chain conveyor belt. The second guide rack is tilted downward from the side close to the chain conveyor belt to the side close to the flattening lower mold and the left and right widths gradually decrease. The minimum width of the second guide rack is adapted to the length of the rods after piercing. The side of the second guide rack close to the flattening lower mold abuts against the top of the flattening lower mold. The front side of the flattening lower mold is provided with a discharge channel tilted downward from the back to the front, and the flattening lower mold is provided with a first ejection mechanism capable of ejecting the rods at both ends flattened in the forming groove to the discharge channel. By setting a material-bearing and flattening mechanism, the first chain conveyor belt transports the rods from the first material moving assembly and through the pressing pier to the chain plate conveyor belt. After the chain plate conveyor belt transports the rods to a high place above the flattening lower die, the rods roll from the chain plate conveyor belt to the second guide rack. Since the second guide rack is an overall inclined closing type, the second guide rack guides the rolling direction of the rods, and the rods roll along the second guide rack into the forming groove of the flattening lower die and the middle front side of the rods rests on the first limiting column. The first limiting column limits the front and rear positions of the rods and cooperates with the forming groove to intercept the rolling rods. The first press drives the flattening upper die to move downward to cooperate with the flattening lower die to complete the flattening of the two ends of the rod pressing pier. After the flattening is completed, the first ejection mechanism ejects the flattened rods from the forming groove into the discharge channel.

[0008] Furthermore, the first ejection mechanism includes a first tip slidably connected to the flattening lower die and capable of lifting the middle rear side of the bar stock within the forming groove. The front-to-rear width of the first tip gradually increases from top to bottom, and the first press is provided with a first driving member that drives the first tip to slide up and down. By providing the first ejection mechanism, the first driving member drives the first tip to move upward to lift the bar stock within the forming groove. The top portion of the first tip has an inclined surface, so that when lifted by the first tip, the bar stock can slide forward or flip over to pass above the top of the first limiting post and fall into the discharge channel.

[0009] Furthermore, the material receiving and hole forming mechanism includes a second press, the second press is provided with a punching lower die and a punching upper die located above the punching lower die, the second press can drive the punching upper die to approach and move away from the punching lower die in the upper and lower directions, the punching lower die and the punching upper die are provided with a guide assembly, the punching lower die is provided with a plurality of second limiting columns that can support the front side of the rod material processed by the material receiving and flattening mechanism, the rear side of the punching lower die is provided with a third guide rack arranged downwardly from back to front, and also includes a second material moving assembly that can receive the rod material from the discharge channel and transfer the rod material to the third guide rack, the punching lower die is provided with a supporting assembly that can support the rod material from the third guide rack against a plurality of second limiting columns, the front side of the punching lower die is provided with a fourth guide rack arranged downwardly from back to front, and the punching lower die is provided with a second ejection mechanism that can eject the rod material punched by the punching lower die and the punching upper die to the fourth guide rack. By setting up a material-carrying and hole-forming mechanism, the second material moving assembly transfers the bar stock from the discharge channel to the third material guide rack. Since the third material guide rack is tilted, the bar stock can slide onto the punching lower die. The supporting assembly makes the bar stock reaching the punching lower die rest against a number of second limiting columns. The second press drives the punching upper die to move downward close to the punching lower die and the bar stock and completes the punching and hole-forming of the flattened ends of the bar stock. After the hole-forming is completed, the second ejection mechanism ejects the bar stock onto the fourth material guide rack.

[0010] The lifting mechanism comprises a third pinion which is adapted to lift the third material handling apparatus and the third guide rail which is adapted to lift the third material handling apparatus and the third guide rail which is adapted to lift the third material handling apparatus. By setting up a second material moving assembly, the second chain conveyor belt receives the rods from the discharge channel and transports the rods to the second material receiving rack through the linear feeder, and then the lifting claw lifts the middle part of the rods in the second material receiving rack, and the third material receiving rack receives the flat ends of the rods lifted by the lifting claw through sliding in the front-back and up-down directions. The third material receiving rack approaches the third guide rack by sliding left and right, and then the second top tip lifts the middle part of the rod on the material receiving claw so that the rod falls into the third guide rack, so that the second material moving assembly can receive the rods from the discharge channel and transfer the rods to the third guide rack; the second driving member drives the third top tip to slide upward to lift the middle part of the rod against the second limit column so that the rod falls into the fourth guide rack.

[0011] Furthermore, the push assembly includes a push rod provided on the punching die, the front end of the push rod is provided with an arc-shaped contact plate, the punching die is provided with a third driving member for driving the push rod to slide, the push rod is tilted from the outside of the punching die toward the middle of the punching die, and the push assembly is symmetrically provided with two groups on the punching die. By providing two groups of push assemblies, the push rod is driven by the third driving member, and the two contact plates can synchronously push the bar material from the left and right sides of the rear of the bar material toward the middle of the punching die respectively. The bar material is subjected to the tilted thrust brought by the contact plates on both sides, and the tilted thrust is decomposed into a thrust in the front-to-back direction and a thrust in the left-to-right direction. Not only can the bar material be pushed toward the middle of the punching die in the front-to-back direction, but the bar material can also slide toward the middle of the punching die in the left-to-right direction, thereby ensuring that the front side of the bar material can accurately contact the second limit column.

[0012] Furthermore, the punching lower die is provided with a motor, and the motor drive is connected to a driving roller group rotatably connected to the punching lower die, and the punching lower die is rotatably connected to a power roller group located above the driving roller group and abutting against the driving roller group, and the third guide rack has an inner cavity for accommodating rod materials, and the top end of the power roller group is located above the bottom end of the inner cavity of the third guide rack, and the fourth guide rack is hinged to the punching lower die through a hinge, and the punching lower die is provided with a fourth driving member for driving the fourth guide rack to swing up and down. By setting a motor, a driving roller group and a power roller group, the driving roller group transmits the rotational force output by the motor to the power roller group through friction. The power roller group gives a thrust to the rod material in the third guide rack to move downward through rotation, thereby increasing the speed at which the rod material slides along the third guide rack, and preventing the rod material sliding from the third guide rack from being located behind the contact plate, resulting in the rod material being unable to be received by the contact plate; the fourth driving member drives the fourth guide rack to swing back and forth up and down around the hinge, and prevents the rod material passing through the hole from being retained on the fourth guide rack.

[0013] Furthermore, the material-bending mechanism includes a second frame, the second frame is provided with a roller conveyor belt for receiving the rod material from the fourth guide frame, the roller conveyor belt is provided with a guide plate, the guide plate includes a first guide portion close to the fourth guide frame, the distance from the first guide portion to the front side of the roller conveyor belt gradually decreases from left to right, a straight second guide portion is provided at the right end of the first guide portion, the distance from the second guide portion to the front side of the roller conveyor belt is adapted to the maximum front-to-back width of the rod material after being flattened at both ends, the second frame is provided with a third frame, the third frame is provided with a bending upper die that can move up and down, and the second frame is provided with a bending upper die that can cooperate with the bending upper die The bar bending lower die, the second frame is provided with a storage rack located in front of the lower bending die, the top of the storage rack is flush with the top of the lower bending die or located above the top of the lower bending die, the storage rack is provided with a sensor capable of detecting the loading status of the bar on the storage rack, the second frame is provided with a second material moving assembly capable of pushing the bar on the storage rack to the lower bending die, the sensor control is connected to the second material moving assembly, the second frame is provided with a collection assembly for collecting the bar, the third frame is provided with a third material moving assembly capable of pushing the bent bar to the collection assembly, the second frame is elastically connected to a top plate capable of lifting the bottom of the bent bar upwards through an elastic member. By setting up a material receiving and bending mechanism, the roller conveyor belt receives the bars from the fourth guide rack and transports the bars to the storage rack, and the guide plate limits the front and rear positions of the bars on the roller conveyor belt. Through the limitation of the guide plate, the bar after hole processing can be accurately sent to the storage rack. Then, after the sensor detects the bar sent to the storage rack, the sensor gives a signal to the second material moving assembly, and the second material moving assembly pushes the bar on the storage rack to the bending lower die, and then the bending upper die moves downward and cooperates with the bending lower die to complete the bending of the bar. During bending, the top plate is pressed downward by the bar and moves when the bending is completed. The bending upper die moves upward, and the top plate moves upward with the bent bar under the reset and rebound action of the elastic part. Then the third material moving assembly pushes the bent bar on the top plate into the collection assembly to complete the collection of the product.

[0014] Furthermore, the second material moving assembly includes a fifth driving member arranged on the second frame, the output end of the fifth driving member is provided with a pushing rack, the collecting assembly includes a fifth material guide rack arranged on the second frame and a collecting box located below the fifth material guide rack, the third material moving assembly includes a rack arranged on the third frame, the third frame is rotatably connected to a gear engaged with the rack, the third frame is provided with a sixth driving member for driving the rack to slide back and forth, the gear is provided with a bent material knocking rod, and the third material moving assembly is symmetrically arranged in two groups on the third frame, the spacing between the front ends of the two material knocking rods in the two groups of the third material moving assemblies is smaller than the left and right width of the bent rod material, and the front end of the material knocking rod in the natural state is located above the top plate. The gear train is driven by the gear and the gears are driven by the gears to move relative to each other, so that the gears can move relative to each other and the gears can move relative to each other, so that the gears can move relative to each other and the gears can move relative to each other.

[0015] In summary, the utility model has the advantages of saving time and labor, and having a reasonable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the main view of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model from a top view;

[0018] Figure 3 It is a structural diagram of the pier pressing mechanism;

[0019] Figure 4 It is a structural diagram of the pier forming block;

[0020] Figure 5 It is a structural diagram of the first frame, the placement seat and the first material moving assembly;

[0021] Figure 6 yes Figure 5 A partial enlarged view of area A in the middle;

[0022] Figure 7 It is a structural diagram of the material-bearing and flattening mechanism;

[0023] Figure 8 It is a structural diagram of the flattening lower die and the second material guide frame;

[0024] Figure 9 It is a structural diagram of the first ejection mechanism;

[0025] Figure 10 It is a structural diagram of the first press, the flattening lower die and the material receiving and hole forming mechanism;

[0026] Figure 11 It is a structural diagram of the second press, the punching lower die, the punching upper die, the third material guide rack, the second material transfer assembly and the fourth material guide rack;

[0027] Figure 12 It is a structural diagram of the punching lower die, the second limiting column, the third guide rack, the conveying assembly, the fourth guide rack, the motor; the driving roller group and the power roller group;

[0028] Figure 13 yes Figure 12 A partial enlarged view of area B in the middle;

[0029] Figure 14 2 is a schematic structural diagram of the second material transfer assembly;

[0030] Figure 15 It is a structural diagram of the second base, the third material receiving rack and the material receiving claws;

[0031] Figure 16 It is the second top structural diagram;

[0032] Figure 17 It is a structural diagram of the delivery component;

[0033] Figure 18 It is a structural diagram of the second ejection mechanism;

[0034] Figure 19 It is a structural diagram of the second press, the punching lower die, the fourth material guide rack and the material-bending mechanism;

[0035] Figure 20 It is a structural diagram of the material-bending mechanism;

[0036] Figure 21 yes Figure 20 A structural diagram from another angle;

[0037] Figure 22 2 is a schematic structural diagram of the second material moving assembly;

[0038] Figure 23 It is a structural diagram of the roller conveyor belt and the guide plate;

[0039] Figure 24It is a structural diagram of the second frame, the ejector plate, the third frame, the third material transfer assembly, the upper bending die, the lower bending die, the storage rack, the sensor and the collection component;

[0040] Figure 25 yes Figure 24 A partial enlarged view of the middle C area;

[0041] In the figure: 1. Pressing mechanism; 11. First frame; 12. Slide; 13. Pressing forming block; 131. First forming cavity; 132. Second forming cavity; 14. Placement seat; 15. Pressing seat; 16. First material moving assembly; 161. Mounting seat; 162. Material fork; 1621. First material receiving frame; 1622. Discharging tip; 1623. Material blocking protrusion; 1624. Material limiting groove; 163. Limiting frame; 164. Pushing frame; 165. First material guide frame; 2. Material flattening mechanism; 21. First pressure Machine; 22, flattening lower die; 221, forming groove; 222, first limiting column; 223, discharge channel; 23, flattening upper die; 24, first chain conveyor belt; 25, chain plate conveyor belt; 26, second material guide rack; 27, first ejection mechanism; 271, first center; 272, first driving member; 3, material receiving and hole forming mechanism; 31, second press machine; 311, punching lower die; 312, punching upper die; 32, second limiting column; 33, third material guide rack; 34, second material transfer assembly; 341, first base; 3 42. Second chain conveyor belt; 343. Second receiving rack; 344. Linear feeder; 345. Lifting claw; 346. Second base; 347. Third receiving rack; 3471. Receiving claw; 35. Feeding assembly; 351. Feeding rod; 352. Contact plate; 36. Fourth guide rack; 37. Second ejector mechanism; 371. Third centering pin; 372. Second driving member; 4. Material bending mechanism; 41. Second frame; 411. Ejecting plate; 42. Roller conveyor belt; 43. Guide plate; 431. First Guide part; 432, second guide part; 44, third frame; 441, third material moving assembly; 4411, rack; 4412, gear; 4413, sixth driving member; 4414, punching rod; 45, upper bending die; 46, lower bending die; 47, storage rack; 471, sensor; 48, second material moving assembly; 481, fifth driving member; 482, push rack; 49, collection assembly; 491, fifth material guide rack; 492, collection box; 5, motor; 51, driving roller group; 52, power roller group. DETAILED DESCRIPTION

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. For ease of understanding, Figure 1 The left side is the left side of the utility model, Figure 1 The right side is the right side of the utility model, Figure 1 The upper side is the upper side of the present invention, Figure 1 The lower side is the lower side of the utility model, Figure 2 The upper side is the front side of the utility model, Figure 2 The lower side is the rear side of the present invention.

[0043] Reference Figures 1 to 6 The utility model includes a pier pressing mechanism 1, which includes a first frame 11. The first frame 11 is slidably connected to two slides 12 that can move toward and away from each other in the left and right straight directions. Specifically, the first frame 11 is provided with at least one left and right horizontally arranged slide rail, and the two slides 12 are slidably connected to the slide rail. The first frame 11 is provided with a plurality of oil cylinders for driving the two slides 12 to move toward and away from each other. Each slide 12 is slidably connected to a pier pressing forming block 13 that can slide in the front and back straight directions. Specifically, each slide 12 is provided with at least one front and back horizontally arranged slide rail, and the two pier pressing forming blocks 13 are respectively slidably connected to the slide rails provided on the two slides 12. The two slides 12 are respectively driven by the oil cylinders to slide the two pier pressing forming blocks 13 synchronously forward and backward. The pier pressing forming blocks 13 are provided with a first conical forming cavity 131 and a second hemispherical forming cavity 132 at intervals in front and back. The first frame 11 is fixedly connected to a placement seat 14 located between the two pier forming blocks 13. The top of the placement seat 14 has a downwardly concave arc groove. The diameter of the arc groove of the placement seat 14 is adapted to the diameter of the rod. The arc groove of the placement seat 14 is used to receive the rod after heating at both ends. The first frame 11 is provided with a pressing seat 15 that can press the rod located on the arc groove of the placement seat 14. The bottom of the pressing seat 15 has an upwardly concave arc groove. The diameter of the arc groove of the pressing seat 15 is adapted to the diameter of the rod. The first frame 11 is provided with an oil cylinder that can drive the pressing seat 15 to slide up and down. The pressing seat 15 slides downward until the arc groove of the pressing seat 15 abuts against the upper side of the rod located in the arc groove of the placement seat 14, completing the pressing of the rod to be pressed.

[0044] Reference Figure 3 、 Figure 5 and Figure 6The first frame 11 is equipped with a first material moving assembly 16, which is capable of placing bars to be pressed onto the placement seat 14 and removing pressed bars from the placement seat 14. Specifically, the first material moving assembly 16 includes a mounting seat 161 that can move up and down. The mounting seat 161 is moved up and down by a hydraulic cylinder, electric push rod cylinder, or pneumatic cylinder installed on the first frame 11. Two material forks 162 are spaced apart from each other on the mounting seat 161, which can move toward and away from the placement seat 14 in the front-to-back direction. The material forks 162 are slidable back and forth by a pneumatic cylinder installed on the mounting seat 161. The horizontal spacing between the two material forks 162 is greater than the maximum left-right width of the placement seat 14 and less than the length of the bar. A first material receiving frame 1621 for receiving the bar is provided at the front of the material forks 162. A discharge tip 1622, whose height gradually decreases from front to back, is provided on the side of the material forks 162 away from the first material receiving frame 1621. The material forks 162 are provided with a material stop protrusion 1623 located between the first material receiving frame 1621 and the discharge tip 1622. The material forks 162 are also provided with a downwardly recessed material limiting groove 1624 located in front of and in front of the material stop protrusion 1623. A limiting frame 163 is provided on either side of the first material receiving frame 1621, extending rearward to the material stop protrusion 1623. The front-to-back length of the limiting frame 163 matches the spacing between the first material receiving frame 1621 and the material limiting groove 1624. Either end of the bar abuts against the limiting frame 163 to position the bar before piercing. Mounting base 161 is equipped with a pusher 164 capable of pushing the bars on first receiving frame 1621 toward limiting groove 1624. Mounting base 161 drives pusher 164 to reciprocate back and forth via a cylinder and a return spring. A discharge tip 1622 is located below the bars on placement base 14. First frame 11 is equipped with a first guide frame 165 that slopes downward from front to back to receive the bars from material fork 162. The front end of first guide frame 165 is located below discharge tip 1622.

[0045] Reference Figure 1 、 Figure 2 、 Figures 7 to 10, and also includes a material receiving and flattening mechanism 2 that can receive the rod material after the two ends of the pier from the first material transfer assembly 16 and flatten the two ends of the rod material after the pier. The material receiving and flattening mechanism 2 includes a first press 21, and the first press 21 is provided with a flattening lower die 22 and a flattening upper die 23 located above the flattening lower die 22. The first press 21 can drive the flattening upper die 23 to move closer to and away from the flattening lower die 22 in the up and down directions. The flattening upper die 23 includes a flattening upper template and a flattening punch provided on the flattening upper template. The structure of the flattening upper die 23 is a common component in the field of flattening dies, and its structural principle has been well known to those skilled in the art and will not be repeated here. The flattening lower die 22 is provided with a forming groove 221, and the shape of the forming groove 221 is adapted to the flattening upper die 23 to flatten the two ends of the rod material after the pier and avoid the straight rod-shaped middle part of the rod material. The flattening lower die 22 and the flattening upper die 23 are provided with a guide assembly, and the guide assembly can be a guide column and guide sleeve combination. The top of the flattening lower die 22 is provided with a plurality of first limiting posts 222 located in the front portion of the forming groove 221 near the middle position and capable of abutting against the front side of the middle portion of the bar. It also includes a first chain conveyor 24 capable of receiving the bar from the first material transfer assembly 16 and a chain plate conveyor 25 for transferring the bar from the first chain conveyor 24 to the top of the flattening lower die 22. The first press 21 is provided with a second guide rack 26 for receiving the bar from the chain plate conveyor 25. The second guide rack 26 is tilted downward from the side close to the chain plate conveyor 25 to the side close to the flattening lower die 22 and the left and right widths gradually decrease. The minimum width of the second guide rack 26 is adapted to the length of the bar after piercing. The side of the second guide rack 26 close to the flattening lower die 22 abuts against the top of the flattening lower die 22. The front side of the flattening lower die 22 is provided with a discharge channel 223, which is arranged downwardly and tilted from back to front. The flattening lower die 22 is equipped with a first ejection mechanism 27 capable of ejecting the flattened rod stock at both ends within the forming groove 221 into the discharge channel 223. The flattening lower die 22 is elastically connected to two spring-loaded limiter plates, which are used to guide the rod stock as it rolls from the second guide frame 26 into the forming groove 221. The limiter plates are elastically connected to the flattening lower die 22 via springs to prevent the downwardly moving flattening upper die 23 from interfering with the limiter plates. The first ejection mechanism 27 includes a first tip 271, which is slidably connected to the flattening lower die 22 and is capable of lifting the middle rear portion of the rod stock within the forming groove 221. The front-to-back width of the first tip 271 gradually increases from top to bottom. The first press 21 is equipped with a first drive member 272 that drives the first tip 271 up and down.

[0046] Reference Figure 1 、 Figure 2 and Figures 11 to 19, also includes a material receiving and hole forming mechanism 3 that can receive the bar material flattened at both ends by the material receiving and flattening mechanism 2 and process through holes on the two ends of the bar material after being flattened. The material receiving and hole forming mechanism 3 includes a second press 31, and the second press 31 is provided with a punching lower die 311 and a punching upper die 312 located above the punching lower die 311. The punching upper die 312 includes, from top to bottom, a punching upper template, a punch fixing plate connected to the punching upper template, a punch interference fit in the punch fixing plate, and a pressure plate elastically connected to the punching upper template. The pressure plate is used to press the material before and during punching. The structure of the punching upper die 312 is a common component in the field of punching dies. Its structural principle is well known to those skilled in the art and will not be repeated here. The punching lower die 311 includes, from bottom to top, a punching lower template and a punching die provided on the punching lower template. The punching die is provided with a through hole matching the punch for completing punching. The structure of the punching lower die 311 is a common component in the field of punching dies, and its structural principle is well known to those skilled in the art and will not be repeated here. The second press 31 can drive the punching upper die 312 to move closer to and away from the punching lower die 311 in the up and down directions. The punching lower die 311 and the punching upper die 312 are provided with a guide assembly, and the guide assembly can be a guide column and guide sleeve combination. The punching lower die 311 is provided with a plurality of second limiting columns 32 that can support the front side of the bar material processed by the material-bearing and flattening mechanism 2. The rear side of the punching lower die 311 is provided with a third guide rack 33 that is tilted downward from back to front.

[0047] Reference Figure 11 and Figures 14 to 18The material receiving and hole forming mechanism 3 also includes a second material moving assembly 34 capable of receiving the bar material from the discharge channel 223 and transferring the bar material to the third material guide rack 33. The second material moving assembly 34 includes a first base 341, which is provided with a second chain conveyor belt 342 capable of receiving the bar material from the discharge channel 223. The first base 341 is provided with a second material receiving rack 343 and a linear feeder 344 that transfers the bar material on the second chain conveyor belt 342 to the second material receiving rack 343. The second material receiving rack 343 is provided with a lifting claw 345 that can lift the middle part of the bar material located in the second material receiving rack 343 by moving up and down. The lifting claw 345 is moved up and down by a cylinder provided on the first base 341, thereby lifting the middle part of the bar material located in the second material receiving rack 343. The lifting claw 345 is made of a downwardly concave arc plate and can firmly lift the middle part of the bar material. The second material moving assembly 34 also includes a second base 346, which is equipped with a third material receiving rack 347 that can approach the second material receiving rack 343 and the third material guide rack 33 in the left-right, front-back, and top-bottom directions. Specifically, the second base 346 is equipped with a slide cylinder or a screw-nut pair with an output end that can slide back and forth. A slide cylinder that can slide back and forth is then installed on the output end of the slide cylinder or the screw-nut pair. A linear cylinder that can reciprocate up and down is then installed on the output end of the slide cylinder that can slide back and forth. The third material receiving rack 347 is installed on the output end of the linear cylinder that can reciprocate up and down. The third material receiving rack 347 has material receiving claws 3471 that can lift the two ends of the flattened bar stock. It also includes a second top point that can lift the middle part of the rod on the receiving claw 3471 to make the rod fall into the third guide rack 33. In this embodiment, a small cylinder is provided on the slide cylinder whose output end can slide back and forth, and the second top point is provided on the output end of the small cylinder. The second top point has a tip that tilts downward from back to front. The second top point can give an upward thrust to the rod on the receiving claw 3471 when moving upward and make the rod slide downward along the tip of the second top point.

[0048] Reference Figure 12 、 Figure 13 and Figures 16 to 18The punching lower die 311 is equipped with a push-in assembly 35 capable of pushing the bar stock from the third guide rack 33 against the plurality of second limiting posts 32. The push-in assembly 35 includes a push-in rod 351 mounted on the punching lower die 311. The front end of the push-in rod 351 is provided with an arc-shaped contact plate 352. The punching lower die 311 is equipped with a third driving member for driving the push-in rod 351 to slide. The push-in rod 351 is tilted from the outside of the punching lower die 311 toward the center of the punching lower die 311. Two sets of push-in assemblies 35 are symmetrically arranged on the punching lower die 311. The front side of the punching lower die 311 is equipped with a fourth guide rack 36, which is tilted downward from back to front. The punching lower die 311 is equipped with a second ejection mechanism 37 capable of ejecting the bar stock punched by the punching lower die 311 and the punching upper die 312 onto the fourth guide rack 36. The second ejection mechanism 37 includes a third tip 371 that slides into the punching die 311 and is capable of lifting the middle rear side of the bar stock located on the punching die 311. The front-to-back width of the third tip 371 gradually increases from top to bottom, and the shape of the third tip 371 and the top of the second tip are roughly the same. The second press 31 is provided with a second driving member 372 that drives the third tip 371 to slide up and down. After the bar stock is holed, a trimming die can be used to trim the outer edges of the flat ends of the bar stock. When using a trimming die, the holes machined from the flat ends of the bar stock can be used for center positioning. Alternatively, the next process can be carried out directly without trimming. After the entire process is completed, the outer edges of the flat ends of the U-shaped ring can be machined by grinding.

[0049] Reference Figure 1 、 Figure 2 and Figures 19 to 25The present invention also includes a material-bending mechanism 4 capable of receiving the bar stock after the holes at both ends have been processed by the material-bending mechanism 3 and bending the bar stock from the middle. The material-bending mechanism 4 includes a second frame 41, which is provided with a roller conveyor belt 42 for receiving the bar stock from the fourth guide frame 36. The roller conveyor belt 42 is provided with a guide plate 43. The guide plate 43 includes a first guide portion 431 adjacent to the fourth guide frame 36. The spacing between the first guide portion 431 and the front side of the roller conveyor belt 42 gradually decreases from left to right. A straight second guide portion 432 is provided at the right end of the first guide portion 431. The spacing between the second guide portion 432 and the front side of the roller conveyor belt 42 is adapted to the maximum front-to-back width of the bar stock after being flattened at both ends. The second frame 41 is provided with a third frame 44, which is provided with a bending upper die 45 that can move up and down. The second frame 41 is provided with a hydraulic cylinder for driving the bending upper die 45 to move up and down. The second frame 41 is provided with a lower bending die 46 that can cooperate with the upper bending die 45 to bend the bar material. The upper bending die 45 and the lower bending die 46 are common components in the field of bending dies. Their structural principles are well known to those skilled in the art and will not be repeated here. In this embodiment, the lower bending die 46 is, from bottom to top, a lower bending template and two bending forming blocks spaced apart on the lower bending template. The lower bending template can be provided with an anti-side block to resist lateral force against the left side wall of the bending forming block on the left and the right side wall of the bending forming block on the right. The second frame 41 is provided with a storage rack 47 located in front of the bending lower die 46. The top of the storage rack 47 is flush with or located above the top of the bending lower die 46. The storage rack 47 is provided with an upwardly extending top plate on the side relative to the roller conveyor belt 42, that is, on the right side of the storage rack 47. The right side of the bar to be bent conveyed by the roller conveyor belt 42 abuts against the top plate of the storage rack 47 to achieve positioning before bending. The storage rack 47 is provided with a sensor 471 capable of detecting the loading status of the bar on the storage rack 47. The sensor 471 can optionally be a proximity switch. The second frame 41 is provided with a second material moving assembly 48 capable of pushing the bar from the storage rack 47 to the bending lower die 46. The sensor 471 is controlled and connected to the second material moving assembly 48. The second material moving assembly 48 includes a fifth driving member 481 provided on the second frame 41. The output end of the fifth driving member 481 is provided with a push rack 482. The second frame 41 is provided with a collecting assembly 49 for collecting bar materials. The collecting assembly 49 includes a fifth material guide rack 491 provided on the second frame 41 and a collecting box 492 located below the fifth material guide rack 491 .

[0050] Reference Figure 21 、 Figure 24 and Figure 25The third frame 44 is provided with a third material moving assembly 441 that can push the bent rod material to the collecting assembly 49. The third material moving assembly 441 includes a rack 4411 arranged on the third frame 44. The third frame 44 is rotatably connected to a gear 4412 that engages with the rack 4411. The third frame 44 is provided with a sixth driving member 4413 for driving the rack 4411 to slide back and forth. The gear 4412 is provided with a bent material pushing rod 4414. The third material moving assembly 441 is symmetrically arranged in two groups on the third frame 44. The distance between the front ends of the two material pushing rods 4414 in the two groups of third material moving assemblies 441 is smaller than the left and right width of the bent rod material. The front end of the material pushing rod 4414 is located above the top plate 411 in the natural state. The second frame 41 is elastically connected to a lifting plate 411 capable of lifting the bottom of the bent rod upwards through an elastic member. In this embodiment, the lifting plate 411 is located between the two bending forming blocks, and the elastic member can be a compression spring.

[0051] Reference Figure 12 The punching lower die 311 is equipped with a motor 5, which drives a drive roller assembly 51 rotatably connected to the punching lower die 311. The punching lower die 311 is rotatably connected to a power roller assembly 52 located above and abutting the drive roller assembly 51. The third guide frame 33 has an inner cavity for accommodating bar stock. The top of the power roller assembly 52 is located above the bottom of the inner cavity of the third guide frame 33, that is, the top of the power roller assembly 52 is slightly higher than the bottom of the inner cavity of the third guide frame 33. The fourth guide frame 36 is hinged to the punching lower die 311 via a hinge. The punching lower die 311 is equipped with a fourth drive member for driving the fourth guide frame 36 to swing up and down. In this embodiment, the first drive member 272, the second drive member 372, the third drive member, the fourth drive member, the fifth drive member 481, and the sixth drive member 4413 can be pneumatic cylinders or electric push rod cylinders.

[0052] When using this utility model:

[0053] 1. Pressing and loading: The heated bars at both ends are placed on the first receiving rack 1621 manually or with automated equipment, and any one of the left and right ends of the bars is placed against the limiting rack 163. Then, the pushing rack 164 pushes the bars to roll into the limiting groove 1624. The mounting seat 161 moves up and down, driving the material fork 162 to move up and down. The discharge tip 1622 on the material fork 162 can lift the pressed bar on the placement seat 14 upward by accompanying the upward movement of the material fork 162. Under the action of gravity, the pressed bar rolls obliquely downward along the discharge tip 1622 into the first guide rack 165. After the material fork 162 moves upward to complete the unloading of the rods in the placement seat 14 and the pushing of the pushing frame 164, the material fork 162 moves backward to make the rods in the limiting groove 1624 close to the top of the placement seat 14 in the front-to-back direction until they are above the top of the placement seat 14, and then the mounting seat 161 moves downward, and the rods in the limiting groove 1624 are received by the arc groove of the placement seat 14, and finally the material fork 162 moves forward to reset.

[0054] 2. Pressing: The pressing seat 15 presses the rod on the placement seat 14. At this time, the two ends of the rod are exposed after heating. Then the pressing forming block 13 slides back and forth to align the first forming cavity 131 with the rod. Then the two slides 12 slide left and right close to each other until the first forming cavity 131 contacts the two ends of the rod. As the slide 12 continues to slide, the heated left end of the rod is squeezed into a cone by the first forming cavity 131 on the left, the left side of the placement seat 14, and the left side of the pressing seat 15. The heated right end of the rod is squeezed into a cone by the first forming cavity 131 on the right, the right side of the placement seat 14, and the right side of the pressing seat 15. Then the two slides 12 move away from the rod, and the pier forming block 13 aligns the second forming cavity 132 with the rod by sliding back and forth, and then the two slides 12 slide left and right close to each other until the second forming cavity 132 contacts the two ends of the rod. As the slide 12 continues to slide, the conical left end of the rod is squeezed into a spherical shape by the second forming cavity 132 on the left, the left side of the placement seat 14, and the left side of the pressing seat 15. The conical right end of the rod is squeezed into a spherical shape by the second forming cavity 132 on the right, the right side of the placement seat 14, and the right side of the pressing seat 15, completing the piering of both ends of the rod.

[0055] 3. Material flattening: After the pressing is completed, the pressing seat 15 releases the pressure on the rod on the placement seat 14, and the first material moving assembly 16 removes the pressed rod on the placement seat 14. The rod rolls downward along the discharge tip 1622 to the first guide rack 165. The first chain conveyor 24 conveys the rods from the first guide rack 165 and through the pressing pier to the chain conveyor 25. After the chain conveyor 25 conveys the rods to a high place above the flattening lower die 22, the rods roll from the chain conveyor 25 to the second guide rack 26. Since the second guide rack 26 is an overall inclined closing type, the second guide rack 26 guides the rolling direction of the rods. The rods roll along the second guide rack 26 into the forming groove 221 of the flattening lower die 22 and the front side of the middle of the rods rests on the first limiting column 222. The first limiting column 222 limits the front and rear positions of the rods and cooperates with the forming groove 221 to intercept the rolling rods. The first press 21 drives the flattening upper die 23 to move downward to cooperate with the flattening lower die 22 to complete the flattening of the two ends of the bar pressing pier. After the flattening is completed, the first driving member 272 drives the first tip 271 to move upward to lift the rod in the forming groove 221. The upper part of the first tip 271 has an inclined slope. When the rod is lifted by the first tip 271, it can slide forward or flip over to pass above the top of the first limiting column 222 and fall into the discharge channel 223.

[0056] 4. Material Receiving and Hole Forming: The second material transfer assembly 34 transfers the bar stock from the discharge channel 223 to the third material guide rack 33. Specifically, the second chain conveyor 342 receives the bar stock from the discharge channel 223 and transports it to the second material receiving rack 343 via the linear feeder 344. The lifting claw 345 then lifts the center of the bar stock within the second material receiving rack 343. The third material receiving rack 347 slides forward and backward and upward and downward to receive the flat ends of the bar stock lifted by the lifting claw 345. The third material receiving rack 347 slides left and right toward the third material guide rack 33. The second tip lifts the center of the bar stock on the receiving claw 3471, causing it to drop into the third material guide rack 33. Through the tilting third material guide rack 33 and the rotating power roller assembly 52, the bar stock slides onto the punching lower die 311. The push assembly 35 causes the bar stock that reaches the punching lower die 311 to rest against a plurality of second limiting posts 32. Specifically, the push rod 351, driven by the third driving member, causes the two contact plates 352 to synchronously push the bar stock from the left and right sides of the rear of the bar stock, tilted, toward the middle of the punching lower die 311. The second press 31 drives the punching upper die 312 downward to approach the punching lower die 311 and the bar stock, completing the punching and hole forming of the flattened ends of the bar stock. After the hole forming is completed, the second ejection mechanism 37 ejects the bar stock onto the fourth guide rack 36. Specifically, the second driving member 372 drives the third tip 371 to slide upward to the middle of the bar stock that is pushed against the second limiting posts 32, causing the bar stock to fall into the fourth guide rack 36.

[0057] 5. Material Bending: The roller conveyor 42 receives the bars from the fourth guide rack 36 and transports them to the storage rack 47. The guide plate 43 limits the front and rear position of the bars on the roller conveyor 42. This positioning ensures that the bars, after being holed, are accurately delivered to the storage rack 47. Sensor 471 then detects the arrival of the bars from the storage rack 47 and sends a signal to the second material transfer assembly 48. The fifth drive element 481 receives this signal and drives the pusher 482 to slide. This pusher 482 slides and pushes the bars to be bent from the storage rack 47 to the lower bending die 46. The upper bending die 45 then moves downward and cooperates with the lower bending die 46 to complete the bending of the bars. During bending, the ejector plate 411 is forced downward by the bar stock. Once bending is complete, the upper bending die 45 moves upward. The ejector plate 411, supported by the bent bar stock, moves upward due to the return action of the elastic element. Finally, the third material transfer assembly 441 pushes the bent bars on the top plate 411 into the collection assembly 49 to complete the collection of the products. Specifically, the sixth drive member 4413 drives the rack 4411 to slide, and the sliding of the rack 4411 drives the gear 4412 to rotate, and the rotation of the gear 4412 drives the punching rod 4414 to rotate. The punching rod 4414 contacts the bent bars and as the punching rod 4414 rotates, the punching rod 4414 hits the bent bars until they are out of contact with the bending upper mold 45 and fall onto the fifth guide rack 491. The finished bars on the fifth guide rack 491 slide into the collection box 492 to complete the collection.

[0058] The utility model provides a U-shaped ring forming device for electrical hardware. By forming heated rods into conical and spherical shapes in two steps, this not only overcomes the lamination problems caused by cold heading, but also makes the internal structure uniform and ensures the forming accuracy of the rods at both ends. The limit frame not only limits the left and right position of the rod, but also guides the rolling direction of the rod, thereby ensuring the accuracy of the rod's position on the placement frame. The material blocking protrusion prevents the rod pushed by the push frame from rushing out of the material limiting groove due to excessive speed. By setting up two sets of push-in components, the push-in rod is driven by the third driving member, and the two contact plates can synchronously push the bar from the left and right sides of the rear of the bar to the middle of the punching lower die respectively. The bar is subjected to the inclined thrust brought by the contact plates on both sides, and the inclined thrust is decomposed into thrust in the front and rear directions and thrust in the left and right directions. It can not only complete the pushing of the bar toward the middle of the punching lower die in the front and rear directions, but also make the bar slide toward the middle of the punching lower die in the left and right directions, thereby ensuring that the front side of the bar can accurately rest on the second limit column. By setting up a motor, a driving roller group and a power roller group, the driving roller group transmits the rotational force output by the motor to the power roller group through friction. The power roller group gives the rod in the third guide rack a thrust to move downward by rotating, thereby increasing the speed of the rod sliding along the third guide rack and preventing the rod sliding from the third guide rack from being located behind the contact plate and being unable to be received by the contact plate; the fourth driving member drives the fourth guide rack to swing back and forth around the hinge member, thereby preventing the rod passing through the hole from being retained on the fourth guide rack. Since the distance between the front ends of the two punching rods is less than the left and right widths of the bent rod and the front end of the punching rod is located above the top plate in the natural state, it can also prevent the bent rod from spontaneously breaking away from contact with the upper die and falling forward, and the flat end is thinner so that the finished bent rod is difficult to be received by the punching rod. In summary, the utility model has the advantages of saving time and labor and having a reasonable structure.

[0059] The above content is merely an example and explanation of the structure of the utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the scope of protection of the utility model.

Claims

1. A U-shaped ring forming device for electric power fittings, characterized by: The invention comprises a pier pressing mechanism (1), wherein the pier pressing mechanism (1) comprises a first frame (11), wherein the first frame (11) is slidably connected with two slides (12) capable of approaching and moving away from each other in the left and right straight directions, wherein each slide (12) is slidably connected with a pier pressing forming block (13) capable of sliding in the front and rear straight directions, wherein the pier pressing forming blocks (13) are provided with a first conical forming cavity (131) and a second hemispherical forming cavity (132) at intervals, wherein the first frame (11) is fixedly connected with a placement seat (14) located between the two pier pressing forming blocks (13), wherein the top end of the placement seat (14) has an arc groove concave downwards, wherein the diameter of the arc groove of the placement seat (14) is adapted to the diameter of the bar material, and wherein the first frame (11) is provided with a pressing mechanism capable of pressing the arc groove located at the placement seat (14). The pressing seat (15) of the rod material on the pressing seat (15) has an arc-shaped groove recessed upward at the bottom end, and the diameter of the arc-shaped groove of the pressing seat (15) is adapted to the diameter of the rod material. The first frame (11) is provided with a first material moving assembly (16) capable of placing the rod material to be pressed onto the placement seat (14) and removing the pressed rod material on the placement seat (14). The first frame (11) also includes a material flattening mechanism (2) capable of receiving the rod material after the pressing of the two ends of the first material moving assembly (16) and flattening the two ends of the rod material after the pressing, a material hole forming mechanism (3) capable of receiving the rod material after the two ends of the flattening by the material flattening mechanism (2) and processing through holes on the two ends of the flattened rod material, and a material bending mechanism (4) capable of receiving the rod material after the through holes at the two ends of the flattened by the material hole forming mechanism (3) and bending the rod material from the middle.

2. The U-shaped ring forming device for electric power fittings according to claim 1, characterized in that: The first material moving assembly (16) includes a mounting seat (161) that can move up and down, and the mounting seat (161) is provided with two material forks (162) that can approach and move away from the placement seat (14) in the front and rear directions. The left and right horizontal spacing of the two material forks (162) is greater than the maximum left and right width of the placement seat (14) and is not greater than the length of the rod material. The front part of the material fork (162) is provided with a first material receiving frame (1621) for receiving the rod material, and the side of the material fork (162) away from the first material receiving frame (1621) is provided with a discharge tip (1622) whose height gradually decreases from front to back, and the material fork (162) is provided with a material stopping protrusion (1623) located between the first material receiving frame (1621) and the discharge tip (1622), and the material fork (162) is provided with a material stopping protrusion (1623) located in front of the material stopping protrusion (1623). and a downwardly recessed material limiting groove (1624); a limiting frame (163) extending backward to the material blocking protrusion (1623) is provided on any one of the left and right sides of the first material receiving frame (1621); the front-to-back length of the limiting frame (163) is adapted to the distance between the first material receiving frame (1621) and the material limiting groove (1624); the mounting seat (161) is provided with a pushing frame (164) capable of pushing the rod on the first material receiving frame (1621) toward the material limiting groove (1624); the discharge tip (1622) is located below the rod on the placement seat (14); the first frame (11) is provided with a first material guide frame (165) tilted downward from front to back for receiving the rod from the material fork (162); the front end of the first material guide frame (165) is located below the discharge tip (1622).

3. The U-shaped ring forming device for electric power fittings according to claim 1, characterized in that: The material receiving and flattening mechanism (2) includes a first press (21), the first press (21) is provided with a flattening lower die (22) and a flattening upper die (23) located above the flattening lower die (22), the first press (21) can drive the flattening upper die (23) to move closer to and away from the flattening lower die (22) in the up and down directions, the flattening lower die (22) is provided with a forming groove (221), the flattening lower die (22) and the flattening upper die (23) are provided with a guide assembly, the top of the flattening lower die (22) is provided with a plurality of first limiting columns (222) located at the front of the forming groove (221) near the middle position and capable of supporting the front side of the middle of the bar material, and also includes a first chain conveyor (24) capable of receiving the bar material from the first material transfer assembly (16) and transferring the bar material from the first chain conveyor (24) to the flattening lower die (22) above the chain plate conveyor (25), the first press (21) is provided with a second guide frame (26) for receiving the rod material from the chain plate conveyor (25), the second guide frame (26) is tilted downward from the side close to the chain plate conveyor (25) to the side close to the flattening lower die (22) and the left and right widths gradually decrease, the minimum width of the second guide frame (26) is adapted to the length of the rod material after piercing, the side of the second guide frame (26) close to the flattening lower die (22) abuts against the top of the flattening lower die (22), the front side of the flattening lower die (22) is provided with a discharge channel (223) tilted downward from the back to the front, and the flattening lower die (22) is provided with a first ejection mechanism (27) capable of ejecting the rod material at both ends of the flattening in the forming groove (221) to the discharge channel (223).

4. The U-shaped ring forming device for electric power fittings according to claim 3, characterized in that: The first ejection mechanism (27) includes a first tip (271) that is slidably connected to the flattening lower die (22) and is capable of lifting the middle rear side of the rod located in the forming groove (221). The front and rear widths of the first tip (271) gradually increase from top to bottom. The first press (21) is provided with a first driving member (272) that drives the first tip (271) to slide up and down.

5. The U-shaped ring forming device for electric power fittings according to claim 3, characterized in that: The material receiving and hole forming mechanism (3) includes a second press (31), the second press (31) is provided with a punching lower die (311) and a punching upper die (312) located above the punching lower die (311), the second press (31) is capable of driving the punching upper die (312) to move closer to and away from the punching lower die (311) in the vertical direction, the punching lower die (311) and the punching upper die (312) are provided with a guide assembly, the punching lower die (311) is provided with a plurality of second limiting columns (32) capable of supporting the front side of the bar material processed by the material receiving and flattening mechanism (2), the rear side of the punching lower die (311) is provided with a downwardly inclined arrangement from the back to the front. The third guide rack (33) also includes a second material transfer assembly (34) capable of receiving the bar material from the discharge channel (223) and transferring the bar material to the third guide rack (33); the punching lower die (311) is provided with a supporting assembly (35) capable of supporting the bar material from the third guide rack (33) against a plurality of second limiting columns (32); the front side of the punching lower die (311) is provided with a fourth guide rack (36) inclined downward from the back to the front; the punching lower die (311) is provided with a second ejection mechanism (37) capable of ejecting the bar material punched by the punching lower die (311) and the punching upper die (312) to the fourth guide rack (36).

6. The U-shaped ring forming device for electric power fittings according to claim 5, characterized in that: The second material transfer assembly (34) includes a first base (341), the first base (341) is provided with a second chain conveyor (342) capable of receiving rods from the discharge channel (223), the first base (341) is provided with a second material receiving rack (343) and a linear feeder (344) for transferring the rods on the second chain conveyor (342) to the second material receiving rack (343), the second material receiving rack (343) is provided with a lifting claw (345) capable of lifting the middle part of the rods in the second material receiving rack (343) by moving up and down, and also includes a second base (346), the second base (346) is provided with a lifting claw (345) capable of moving up and down to move closer to the second material receiving rack (343) in the left-right direction, the front-back direction and the up-down direction. The third material receiving rack (347) is provided with a third material receiving rack (343) and a third material guide rack (33), wherein the third material receiving rack (347) has material receiving claws (3471) capable of lifting the two ends of the bar material after being flattened, and further comprises a second top end capable of lifting the middle part of the bar material on the material receiving claws (3471) so that the bar material falls into the third material guide rack (33), the second ejection mechanism (37) comprises a third top end (371) which is slidably connected to the punching lower die (311) and can lift the middle rear side of the bar material located on the punching lower die (311), the front and rear width of the third top end (371) gradually increases from top to bottom, and the second press (31) is provided with a second driving member (372) for driving the third top end (371) to slide up and down.

7. The U-shaped ring forming device for electric power fittings according to claim 5, characterized in that: The abutment assembly (35) comprises an abutment rod (351) provided on the punching lower die (311), a front end of the abutment rod (351) being provided with an arc-shaped contact plate (352), the punching lower die (311) being provided with a third driving member for driving the abutment rod (351) to slide, the abutment rod (351) being arranged obliquely from the outer side of the punching lower die (311) toward the middle of the punching lower die (311), and two groups of the abutment assembly (35) being symmetrically provided on the punching lower die (311).

8. The U-shaped ring forming device for electric power fittings according to claim 7, characterized in that: The punching lower die (311) is provided with a motor (5), the motor (5) is driven and connected to a driving roller group (51) rotatably connected to the punching lower die (311), the punching lower die (311) is rotatably connected to a power roller group (52) located above the driving roller group (51) and abutting against the driving roller group (51), the third guide frame (33) has an inner cavity for accommodating bar materials, the top end of the power roller group (52) is located above the bottom end of the inner cavity of the third guide frame (33), the fourth guide frame (36) is hinged to the punching lower die (311) through a hinge, and the punching lower die (311) is provided with a fourth driving member for driving the fourth guide frame (36) to swing up and down.

9. The U-shaped ring forming device for electric power fittings according to claim 5, characterized in that: The material receiving and bending mechanism (4) includes a second frame (41), the second frame (41) is provided with a roller conveyor (42) for receiving the rod material from the fourth guide frame (36), the roller conveyor (42) is provided with a guide plate (43), the guide plate (43) includes a first guide portion (431) close to the fourth guide frame (36), the distance between the first guide portion (431) and the front side of the roller conveyor (42) gradually decreases from left to right, the right end of the first guide portion (431) is provided with a straight second guide portion (432), the distance between the second guide portion (432) and the front side of the roller conveyor (42) is adapted to the maximum front-to-back width of the rod material after being flattened at both ends, the second frame (41) is provided with a third frame (44), the third frame (44) is provided with a bending upper die (45) that can move up and down, and the second frame (41) is provided with a bending upper die (45) that can cooperate with the bending upper die (45) to bend the rod material. The second frame (41) is provided with a storage rack (47) located in front of the bending lower die (46), the top of the storage rack (47) is flush with the top of the bending lower die (46) or located above the top of the bending lower die (46), the storage rack (47) is provided with a sensor (471) capable of detecting the bar loading state of the storage rack (47), the second frame (41) is provided with a second material moving assembly (48) capable of pushing the bar on the storage rack (47) to the bending lower die (46), the sensor (471) is controlled and connected to the second material moving assembly (48), the second frame (41) is provided with a collecting assembly (49) for collecting the bar, the third frame (44) is provided with a third material moving assembly (441) capable of pushing the bent bar to the collecting assembly (49), and the second frame (41) is elastically connected to a top plate (411) capable of lifting the bottom of the bent bar upwards through an elastic member.

10. The U-shaped ring forming device for electric power fittings according to claim 9, characterized in that: The second material moving assembly (48) includes a fifth driving member (481) provided on the second frame (41), and the output end of the fifth driving member (481) is provided with a push frame (482). The collecting assembly (49) includes a fifth material guide frame (491) provided on the second frame (41) and a collecting box (492) located below the fifth material guide frame (491). The third material moving assembly (441) includes a rack (4411) provided on the third frame (44), and the third frame (44) is rotatably connected to a gear engaged with the rack (4411). The third frame (44) is provided with a sixth driving member (4413) for driving the rack (4411) to slide forward and backward, the gear (4412) is provided with a bent punching rod (4414), and the third material moving assembly (441) is symmetrically arranged in two groups on the third frame (44). The distance between the front ends of the two punching rods (4414) in the two groups of the third material moving assemblies (441) is smaller than the left and right widths of the bent rods, and the front ends of the punching rods (4414) in the natural state are located above the ejector plate (411).

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