A full-automatic C4 bullet strip rotary forming machine and a forming method

Abstract

This invention discloses a fully automatic C4 elastic bar rotary forming machine and forming method. The fully automatic C4 elastic bar rotary forming machine includes a frame and a material ejection unit rotatably connected to the middle of the outer side of the frame. It also includes a feeding unit, a pushing unit, an edge-trimming unit, a bending unit, and an arching unit. The feeding unit, pushing unit, edge-trimming unit, and bending unit are all fixedly installed on the outer side of the frame around the material ejection unit. The edge-trimming unit includes an edge-trimming cylinder and a first guide rail base. The bending unit includes a bending cylinder and a second guide rail base. The edge-trimming unit and the bending unit start synchronously. A receiving unit is provided at the corresponding position of the material ejection unit. The end of the receiving unit away from the frame is connected to the arching unit. A lower mold body is fixedly installed at the lower end of the material ejection unit at the corresponding position of the arching unit. This invention reduces the number of forming equipment required for C4 elastic bar forming to only one machine.

Description

Technical Field

[0001] This invention relates to the field of elastic bar processing technology, specifically to a fully automatic C4 elastic bar rotary forming machine and forming method. Background Technology

[0002] The C4 type elastic clip (also known as the "e" type elastic clip due to its "e" shaped structure) is the core component of the Type IV elastic clip fastener. Compared with other similar elastic clips, it has better performance in terms of clip pressure retention, fatigue life, reliable connection with the foundation, and vibration reduction. It is mainly used as a locking connector on rails. Specifically, in urban rail transit, the e type elastic clip connects the rail to the foundation. Because of its elasticity, the e type elastic clip can also play a buffering role.

[0003] Currently, the forming process used in China is mainly four-stage stamping, which requires four stamping presses and four sets of molds. This means that multiple machines need to work together, and the stamping is still done manually, which is time-consuming, labor-intensive, and inefficient, and cannot meet the needs of current technological development.

[0004] Chinese patent document CN204294699U discloses a device for winding and forming elastic bars for high-speed rail. This patent involves inserting one end of a bar into a bar fixing groove, then pressing the edge head forward while the main shaft rotates at a constant speed to form a coplanar shape. Then, the pressing head retracts, and the main shaft rotates until the arc-shaped groove of the first protrusion faces the axis of the main shaft. Finally, the bending head is pressed forward to form a concave bend in the straight edge in the middle, thus completing the winding and forming operation. To fully form the elastic bar, this device requires a punch press and multiple sets of molds, which is too costly. In addition, many processes require manual operation, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to reduce the number of molding equipment required for C4 elastic bar molding to only one equipment, and without the need for manual operation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fully automatic C4 elastic strip rotary forming machine, including a frame and a material unloading unit rotatably connected to the middle position of the outer side of the frame, and also including a feeding unit, a pushing unit, an edge-receiving unit, a bending unit, and an arching unit. The feeding unit, pushing unit, edge-receiving unit, and bending unit are all fixedly installed on the outer side of the frame around the material unloading unit.

[0007] The edge-gathering unit includes an edge-gathering cylinder and a first guide rail base. Both the edge-gathering cylinder and the first guide rail base are bolted to the frame. The front end of the output shaft of the edge-gathering cylinder is fixedly connected to a first Y-type connector. The edge-gathering cylinder is connected to a first connecting plate through the first Y-type connector. The upper ends of the first guide rail base are fixedly connected to two first linear guide rails. The upper ends of the two first linear guide rails are movably connected to first movable blocks. The upper ends of the two first movable blocks are connected to the first connecting plate. An edge-gathering rod is fixedly connected to the middle position of the side of the first connecting plate facing the unloading unit. The front end of the edge-gathering rod is rotatably connected to an edge-gathering pressure head. The outer side of the edge-gathering pressure head corresponds to the rotary cavity of the unloading unit. The bending unit includes a bending cylinder and a second guide rail base. Both the bending cylinder and the second guide rail base are bolted to the frame. A second Y-type connector is fixedly connected to the front end of the output end of the bending cylinder. The bending cylinder is connected to a second connecting plate through the second Y-type connector. A second linear guide rail is fixedly connected to both sides of the upper end of the second guide rail base. A second movable block is movably connected to the upper end of each of the two second linear guide rails. The upper ends of the two second movable blocks are connected to the second connecting plate. A bending rod is fixedly connected to the middle position of the side of the second connecting plate facing the unloading unit. A bending head is rotatably connected to the front end of the bending rod. The outer side of the bending head corresponds to the rotary cavity of the unloading unit. The edge-trimming unit and the bending unit start synchronously. A receiving unit is provided at the corresponding position of the unloading unit. An arching unit is connected to the end of the receiving unit away from the frame. A lower mold body is fixedly installed at the lower end of the unloading unit at the corresponding position of the arching unit.

[0008] This application completes the feeding process by placing the bar stock into the inner cavity of the feeding unit, and then pushing the bar stock from the inner cavity of the feeding unit to the rotary cavity of the unloading unit. The unloading unit starts to rotate until it contacts the edge-receiving unit and the bending unit. The edge-receiving unit and the bending unit start simultaneously, forcing the bar stock to wind according to the mold shape. The edge-receiving unit presses the bar onto the unloading unit to complete the edge-receiving forming. The bending unit completes the bending forming on the elastic bar. At this time, the "e-shaped" forming of the elastic bar is completed. The edge-receiving unit and the bending unit retract simultaneously. The unloading unit pushes the formed elastic bar outward. The receiving unit clamps it and moves it into the inner cavity of the lower mold body. Then, the arching unit pushes the upper mold body forward until it matches the lower mold body, completing the arching forming of the elastic bar. At the same time, the arching unit and the receiving unit return to their original positions, and the forming of the C4 elastic bar is completed. This reduces the multiple forming equipment required for C4 elastic bar forming to only one machine, and all structures are automated, requiring no manual operation.

[0009] Preferably, the feeding unit includes a receiving base, which is bolted to the outer side of the frame. A first receiving cylinder is fixedly installed at the lower end of the receiving base. The output end of the first receiving cylinder extends outward through the receiving base. Guide rail pairs are provided on both sides of the upper end of the receiving base at the output end of the first receiving cylinder. The output end of the first receiving cylinder and the upper end of the guide rail pairs are connected to a mounting frame. A receiving frame is installed at an angle on the upper end of the mounting frame, and one end of the receiving frame abuts against the rotary cavity of the unloading unit.

[0010] Advantages: It allows the receiving rack to move up and down, which improves the practicality of this application.

[0011] Preferably, a limit motor is fixedly connected to the upper end of the mounting frame near the frame body, and a swing arm is connected to the front end of the output end of the limit motor. A limit block is sleeved above the end of the swing arm, and the outer side of the limit block abuts against the receiving frame.

[0012] Advantages: It effectively limits the position of the receiving rack, ensuring that the bar stock always enters the correct position.

[0013] Preferably, the pushing unit includes a pushing base, which is bolted to the outer side of the frame. A pushing cylinder is fixedly installed at the end of the pushing base away from the frame. A pushing plate is connected to the output end of the pushing cylinder at a position corresponding to the receiving frame. The bottom of the pushing plate abuts against the inner cavity of the receiving frame, and the width of the pushing plate matches the inner diameter of the receiving frame.

[0014] Advantages: It further ensures that the bar stock is always in the correct position.

[0015] Preferably, the receiving unit includes a horizontal mounting plate, with a horizontal cylinder fixedly connected to the upper end of the horizontal mounting plate. A third Y-shaped connector is fixedly connected to the front end of the output shaft of the horizontal cylinder. Horizontal linear guides are fixedly connected to both ends of the upper end of the horizontal mounting plate near the frame. A third movable block is slidably connected to the upper end of each of the two horizontal linear guides. A vertical mounting plate is connected to the upper end of the two third movable blocks. The vertical mounting plate is connected to the horizontal cylinder via the third Y-shaped connector. A vertical cylinder is fixedly connected to the middle position of the side of the vertical mounting plate facing the frame. A fourth Y-shaped connector is fixedly connected to the front end of the output shaft of the vertical cylinder. Vertical linear guides are fixedly installed on both sides of the horizontal mounting plate. A movable plate is slidably connected to the outer sides of the two vertical linear guides. The upper end of the movable plate is connected to the vertical cylinder via the fourth Y-shaped connector. The movable plate corresponds to the discharge port of the unloading unit.

[0016] Preferably, the movable plate has a fourth movable block that matches the vertical linear guide rail fixedly installed at both ends on the side facing the vertical mounting plate. The movable plate is slidably connected to the outside of the vertical mounting plate through the fourth movable block. An adjustment plate is rotatably connected to the end of the movable plate facing the frame. Two opposing second receiving cylinders are installed on the outside of the adjustment plate. The output ends of the two second receiving cylinders are fixedly connected to grippers, and the distance between the two grippers matches the size of the rotary cavity of the unloading unit.

[0017] Advantages: It ensures that the gripper can transport the formed bar stock to the appropriate position, which improves the practicality of this application.

[0018] Preferably, the arching unit includes a fixed base, and a third guide rail base is fixedly installed at the upper end of the fixed base near the receiving unit. Third linear guide rails are installed on both sides of the upper end of the third guide rail base. An upper mold mounting plate is provided at the upper end of the third guide rail base. Fifth movable blocks are fixedly connected to the lower end of the upper mold mounting plate at positions corresponding to the third linear guide rails. The upper mold mounting plate is slidably connected to the third linear guide rails via the fifth movable blocks. An arching cylinder is installed on the upper end of the fixed base away from the receiving unit. A fifth Y-type connector is connected to the output end of the arching cylinder. The other end of the fifth Y-type connector is fixedly connected to the upper mold mounting plate. An upper mold body is fixedly installed at the end of the upper mold mounting plate facing the receiving unit at a position corresponding to the lower mold body.

[0019] According to the above-mentioned preferred inner cavity, the present invention also provides a fully automatic C4 elastic bar forming method, including the following steps: placing the bar material into the inner cavity of the feeding unit, pushing the bar material located in the inner cavity of the feeding unit to the rotary cavity of the unloading unit to complete the feeding through the pushing unit, the unloading unit starting to rotate until it contacts the edge-gathering unit and the bending unit, the edge-gathering unit and the bending unit starting simultaneously to force the bar material to wind according to the mold shape, the edge-gathering unit pressing the bar on the unloading unit to complete the edge-gathering forming material, the bending unit completing the bending forming on the elastic bar, at this time the "e-shaped" forming of the elastic bar is completed, the edge-gathering unit and the bending unit retracting simultaneously, the unloading unit pushing the formed elastic bar to move outward, clamping it through the receiving unit and moving it to the inner cavity of the lower mold body, and then pushing the upper mold body forward through the arching unit until it matches the lower mold body to complete the arching forming of the elastic bar, at the same time the arching unit and the receiving unit returning to the original position, and the forming of the C4 elastic bar is completely completed.

[0020] Compared with the prior art, the beneficial effects of this invention are as follows: This application completes the loading process by placing the bar stock into the inner cavity of the receiving rack, and then activating the pushing cylinder to push the bar stock from the inner cavity of the receiving rack to the rotary cavity of the unloading unit via the pushing plate; the unloading unit drives the bar stock to start rotating, and one end of the bar stock is pushed forward in the inner cavity of the receiving rack by the pushing plate. Under the action of the pushing cylinder, the bar stock is always kept in the correct position. When the bar stock continues to rotate until it hits the edge-receiving pressure head, the edge-receiving pressure head forces the bar stock to wind according to the mold shape. When the main shaft rotates to the required angle, it stops rotating. The edge-receiving cylinder and the bending cylinder... The hydraulic cylinder simultaneously pushes the first guide rail base and the second guide rail base forward, completing the edge finishing and bending work at the same time. The unloading unit transports the formed bar to the outside, where it is gripped by the gripper and transported to the inner cavity of the lower mold body. Then, the arching hydraulic cylinder pushes the upper mold body to make the two sets come together, completing the arching and forming of the elastic bar. This invention reduces the multiple forming equipment required for C4 elastic bar forming to only one piece of equipment, and all structures are automated. It transforms the C4 elastic bar from stamping forming to winding forming, eliminating the need for multiple sets of punch presses and molds. The process is simple, requires no manual operation, has high work efficiency, and is easy to promote. Attached Figure Description

[0021] Figure 1 This is an isometric view of the overall structure of a fully automatic C4 elastic bar rotational forming machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the feeding unit structure of a fully automatic C4 elastic bar rotary forming machine according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the pushing unit structure of a fully automatic C4 elastic bar rotary forming machine according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the edge-gathering unit structure of a fully automatic C4 elastic strip rotary forming machine according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the bending unit structure of a fully automatic C4 elastic strip rotary forming machine according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the receiving unit structure of a fully automatic C4 elastic strip rotary forming machine according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the arching unit structure of a fully automatic C4 elastic bar rotary forming machine according to an embodiment of the present invention.

[0022] In the diagram: 1-Frame; 2-Unloading unit; 3-Loading unit; 31-Receiving base; 32-First receiving cylinder; 33-Guide rail pair; 34-Mounting frame; 35-Receiving frame; 36-Swing rod; 37-Limit block; 38-Limit motor; 4-Pushing unit; 41-Pushing base; 42-Pushing cylinder; 43-Pushing plate; 5-Edge finishing unit; 51-Edge finishing cylinder; 52-First guide rail base; 53-First Y-type connector; 54-First movable block; 55-First linear guide rail; 56-First connecting plate; 57-Edge finishing rod; 58-Edge finishing pressure head; 6-Bending unit; 61-Bending cylinder; 62-Second guide rail base; 63-Second Y-type connector; 64-Second linear guide rail; 65-Second movable block; 66 - Second connecting plate; 67- Bending rod; 68- Bending head; 7- Receiving unit; 71- Horizontal mounting plate; 711- Horizontal cylinder; 712- Horizontal linear guide rail; 713- Third Y-type connector; 714- Third movable block; 72- Vertical mounting plate; 721- Vertical cylinder; 722- Vertical linear guide rail; 723- Fourth Y-type connector; 73- Movable plate; 731- Fourth movable block; 732- Adjusting plate; 733- Second receiving cylinder; 734- Gripper; 8- Lower mold body; 9- Arching unit; 91- Fixed seat; 92- Third guide rail base; 93- Third linear guide rail; 94- Upper mold mounting plate; 941- Fifth movable block; 95- Arching cylinder; 96- Fifth Y-type connector; 10- Upper mold body. Detailed Implementation

[0023] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] See Figure 1 This embodiment discloses a fully automatic C4 elastic bar rotary forming machine and forming method, including a frame 1, a material ejection unit 2, a material feeding unit 3, a material pushing unit 4, an edge finishing unit 5, a bending unit 6, a receiving unit 7, a lower mold body 8, an arching unit 9, and an upper mold body 10.

[0026] See also Figure 1-2A material unloading unit 2 is rotatably connected to the middle position of the frame 1. The material unloading unit 2 is equipped with a rotating cavity, and a rotating shaft is provided inside the rotating cavity. The material loading unit 3 is located on the outside of the frame 1. The material loading unit 3 includes a receiving base 31, a first receiving cylinder 32, a guide rail pair 33, a mounting bracket 34, a receiving frame 35, a swing rod 36, a limit block 37, and a limit motor 38. The receiving base 31 is fixedly installed on the lower half of the outer side of the frame 1 by bolts. The first receiving cylinder 32 is mounted on the lower half of the frame 1. The output shaft of the first receiving cylinder 32 extends outward through the receiving base 31 and is mounted on the lower end of the receiving base 31. The upper end of the receiving base 31 is slidably connected to both sides of the output shaft of the first receiving cylinder 32. The two guide rail pairs 33 and the upper end of the output shaft of the first receiving cylinder 32 are connected to the mounting bracket 34. The upper end of the mounting bracket 34 is inclinedly mounted with a receiving frame 35. One end of the receiving frame 35 corresponds to the position of the material inlet of the rotary cavity of the unloading unit 2.

[0027] In this embodiment, by activating the first receiving cylinder 32, the mounting frame 34 is driven to move up and down along the guide rail pair 33. When the mounting frame 34 is at the lower end, it is the bar stock feeding position. When the mounting frame 34 is at the upper end, the bar stock enters the rotary cavity of the unloading unit 2 under the action of the pushing unit 4, thereby completing the feeding process.

[0028] The limit motor 38 is installed on the upper end of the mounting bracket 34 near the side of the frame 1. The output end of the limit motor 38 is connected to the swing rod 36. A limit block 37 is sleeved on the upper end of the swing rod 36 away from the limit motor 38. The outer side of the limit block 37 abuts against the outer side of the receiving frame 35, and the height of the limit block 37 is higher than the side wall of the receiving frame 35.

[0029] In this embodiment, the swing rod 36, the limiting blocks 37 and 39 form a limiting mechanism to limit the position of the connecting rack 35, effectively ensuring that the bar stock always enters the correct position.

[0030] See also Figure 1 , 3 The pushing unit 4 is installed on the outside of the frame 1, above the feeding unit 3. The pushing unit 4 includes a pushing base 41, a pushing cylinder 42, and a pushing plate 43. The pushing base 41 is bolted to the outside of the frame 1. The pushing cylinder 42 is fixedly installed on the upper end of the pushing base 41 away from the frame 1. The output end of the pushing cylinder 42 is fixedly connected to the pushing plate 43. The pushing plate 43 has a groove (not shown in the figure) that matches the bar material on the side facing the unloading unit 2. The pushing plate 43 has an overall "arc" structure. The lower end of the pushing plate 43 slides and overlaps the inner cavity of the receiving frame 35.

[0031] In this embodiment, the width of the pusher plate 43 matches the inner diameter of the receiving frame 35.

[0032] In this embodiment, the bar stock placed in the inner cavity of the receiving rack 35 moves in a straight line under the push of the pusher plate 43, pushing the bar stock into the rotary cavity of the unloading unit 2. When the unloading unit 2 starts to rotate, the bar stock rotates accordingly, and at the same time, one end of the bar stock slides in the groove of the pusher plate 43 (not shown in the figure). Under the action of the pusher cylinder 42, the bar stock is always kept in the correct position, effectively preventing the bar stock from slipping out of the inner cavity of the receiving rack 35, and effectively improving the practicality of this application.

[0033] See also Figure 1 , 4 The edge-trimming unit 5 is installed on the outside of the frame 1, above the pushing unit 4. The edge-trimming unit 5 includes an edge-trimming cylinder 51, a first guide rail base 52, a first Y-type connector 53, a first movable block 54, a first linear guide rail 55, a first connecting plate 56, an edge-trimming rod 57, and an edge-trimming pressure head 58. The edge-trimming cylinder 51 and the first guide rail base 52 are bolted to the frame 1. The first Y-type connector 53 is installed at the front end of the output end of the edge-trimming cylinder 51. The first linear guide rail 55 has two sections, both fixedly installed on both sides of the upper end of the first guide rail base 52. The movable block 54 has two slidingly mounted on the upper end of the first linear guide rail 55, and the upper ends of the two first linear guide rails 55 are connected to a first connecting plate 56. One side of the first connecting plate 56 is connected to the edge-retracting cylinder 51 through the first Y-type connector 53. The other side of the first connecting plate 56 is fixedly connected to the middle position of the edge-retracting rod 57. The end of the edge-retracting rod 57 away from the first connecting plate 56 is rotatably connected to the edge-retracting pressure head 58. When the bar rotates to the initial position of the edge-retracting pressure head 58, the bar is forced to wind according to the shape of the mold under the action of the edge-retracting pressure head 58.

[0034] In this embodiment, when the unloading unit 2 rotates to the required angle, it stops rotating. The edge-retracting pressure head 58 moves forward under the action of the edge-retracting cylinder 51, pressing the bar material onto the rotating shaft of the unloading unit 2 to complete the forming.

[0035] Referring to 1 and 5, the bending unit 6 is installed on the outside of the frame 1, on the side of the unloading unit 2 away from the pushing unit 4. The bending unit 6 includes a bending cylinder 61, a second guide rail base 62, a second Y-type connector 63, a second linear guide rail 64, a second movable block 65, a second connecting plate 66, a bending rod 67, and a bending head 68. The bending cylinder 61 and the second guide rail base 62 are bolted to the frame 1. The second Y-type connector 63 is installed at the front end of the output shaft of the bending cylinder 61. The second linear guide rail 64 has two sections, both fixedly installed on the upper sides of the second guide rail base 62. The second movable block 65 has... Both sides are slidably sleeved on the upper end of the second linear guide 64. The upper ends of the two second movable blocks 65 are connected to the second connecting plate 66. One end of the second connecting plate 66 is connected to the bending cylinder 61 through the second Y-type connector 63. The middle position of the other end of the second connecting plate 66 is fixedly connected to the bending rod 67. The end of the bending rod 67 away from the second connecting plate 66 is rotatably connected to the bending head 68. When the unloading unit 2 rotates to the required angle, it stops rotating. The bending head 68 moves forward under the action of the bending cylinder 61. The bending head 68 completes the bending on the elastic bar. At this time, the "e" shape of the elastic bar is completed.

[0036] In this embodiment, the bending unit 6 and the edge-receiving unit 5 start processing simultaneously when the unloading unit 2 stops rotating after rotating to the required angle, which effectively improves work efficiency.

[0037] See also Figure 1 , 6 The receiving unit 7 is L-shaped and has a vertical end and a horizontal end. The vertical end of the receiving unit 7 is located on the outside of the unloading unit 2. The receiving unit 7 includes a horizontal mounting plate 71, a vertical mounting plate 72, and a movable plate 73. The horizontal mounting plate 71 is a flat rectangular structure. A horizontal cylinder 711 is installed at the middle of the upper end of the horizontal mounting plate 71. A third Y-type connector 713 is installed at the front end of the output shaft of the horizontal cylinder 711. Horizontal linear guide rails 712 are installed at both ends of the upper end of the horizontal mounting plate 71 near the frame 1. A third movable block 714 is slidably connected to the upper end of each horizontal linear guide rail 712.

[0038] The vertical mounting plate 72 has an overall "L-shaped" structure, with a vertical end and a horizontal end. The lower ends of the horizontal end of the vertical mounting plate 72 are fixedly connected to the upper ends of the third movable block 714 on both sides, and the upper end of the horizontal end of the vertical mounting plate 72 is fixedly connected to the horizontal cylinder 711 through the third Y-type connector 713.

[0039] In this embodiment, the horizontal cylinder 711 is activated to move the vertical mounting plate 72 horizontally, which facilitates position adjustment and effectively improves the practicality of this application.

[0040] A vertical cylinder 721 is installed at the middle of the vertical end of the vertical mounting plate 72. The output shaft of the vertical cylinder 721 is connected to the front end of the fourth Y-type connector 723. Vertical linear guide rails 722 are installed at both ends of the vertical end of the vertical mounting plate 72 near the third movable block 714. The movable plate 73 is slidably connected to the side of the vertical mounting plate 72 facing the unloading unit 2. The upper end of the movable plate 73 is connected to the vertical cylinder 721 through the fourth Y-type connector 723.

[0041] In this embodiment, the vertical cylinder 721 is activated to drive the movable plate 73 to move vertically, so that the movable plate 73 can transport the formed elastic strip to the specified position.

[0042] The movable plate 73 has a rectangular structure. On the side of the movable plate 73 away from the unloading unit 2, both ends are equipped with fourth movable blocks 731 that match the vertical linear guide rail 722. The movable plate 73 is sleeved on the outside of the vertical linear guide rail 722 and slidably connected to the vertical mounting plate 72 through the fourth movable blocks 731. An adjusting plate 732 is rotatably connected to the middle position on the side of the movable plate 73 facing the unloading unit 2. The adjusting plate 732 has a ring structure. Two second receiving cylinders 733 are installed at opposite positions on the side wall of the adjusting plate 732. A gripper 734 is installed on the outside of the output shaft of each of the two second receiving cylinders 733.

[0043] In this embodiment, after the bar stock completes the "e" forming, the horizontal cylinder 711 pushes the vertical mounting plate 72 to move to the right. When the gripper 734 reaches the designated position, the ejector unit 2 pushes the spring bar out of the rotating shaft. The second receiving cylinder 733 retracts radially along the angle of the gripper 734 to clamp the spring bar. At the same time, the horizontal cylinder 711 moves to the right to remove the spring bar from the rotating shaft. The vertical cylinder 721 pushes the movable plate 73 downward to make the spring bar reach the designated position.

[0044] In this embodiment, the distance between the two grippers 734 matches the size of the rotary cavity of the ejector unit 2, which facilitates the clamping of the spring bar.

[0045] See also Figure 1 , 7The lower mold body 8 is installed at the lower end of the unloading unit 2. The arching unit 9 is fixedly connected to the horizontal end of the receiving unit 7. The arching unit 9 includes a fixed base 91, a third guide rail base 92, a third linear guide rail 93, an upper mold mounting plate 94, an arching cylinder 95, and a fifth Y-type connector 96. The third guide rail base 92 is installed on the upper end of the fixed base 91 near the receiving unit 7. The third linear guide rail 93 has two sections, both installed on the upper sides of the third guide rail base 92. The upper mold mounting plate 94 is located at the upper end of the third guide rail base 92. The lower end of 94 is equipped with a fifth movable block 941 corresponding to the position of the third linear guide 93. The upper mold mounting plate 94 is slidably connected to the upper end of the third linear guide 93 and movably connected to the third guide base 92 through the fifth movable block 941. The arching cylinder 95 is installed on the upper end of the third guide base 92 away from the receiving unit 7. The output shaft of the arching cylinder 95 is connected to the upper mold mounting plate 94 through the fifth Y-type connector 96. The upper mold body 10 is installed at the end of the upper mold mounting plate 94 away from the arching cylinder 95 and corresponding to the position of the lower mold body 8.

[0046] In this embodiment, the gripper 734 holds the spring bar, and the vertical cylinder 721 pushes the movable plate 73 to move until the gripper 734 places the spring bar into the inner cavity of the lower mold body 8. Then, the arching cylinder 95 pushes the upper mold mounting plate 94 together with the upper mold body 10 to move forward until the upper mold body 10 and the lower mold body 8 are joined to complete the arching and forming of the spring bar.

[0047] Furthermore, all processes in this application are automated.

[0048] The working principle of this embodiment is as follows: The operator places the bar stock into the inner cavity of the receiving rack 35, and activates the pushing cylinder 42 to push the bar stock from the inner cavity of the receiving rack 35 into the rotary cavity of the unloading unit 2 via the pushing plate 43, thus completing the loading process. The unloading unit 2 drives the bar stock to rotate, with one end of the bar stock being pushed forward in the inner cavity of the receiving rack 35 by the pushing plate 43. Under the action of the pushing cylinder 42, the bar stock remains in the correct position. As the bar stock continues to rotate until it encounters the edge-receiving pressure head 58, the edge-receiving pressure head 58 forces the bar stock to wind according to the mold shape. When the main shaft rotates to the required angle, it stops rotating. The edge-receiving cylinder 51 and the bending cylinder 61 work together... The first guide rail base 52 and the second guide rail base 62 are pushed forward to complete the edge finishing and bending work. The unloading unit 2 transports the formed bar to the outside and pushes the gripper 734 through the second receiving cylinder 733 to grab it and transport it to the inner cavity of the lower mold body 8. Then, the arching cylinder 95 pushes the upper mold body 10 to make the two sets come together to complete the arching of the elastic bar. This invention reduces the multiple forming equipment required for C4 elastic bar forming to only one equipment. All structures are automated, making C4 elastic bar forming change from stamping forming to winding forming. There is no need to equip multiple sets of punch presses and molds. The process is simple, no manual operation is required, the work efficiency is high, and it is easy to promote.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A full-automatic C4 bullet strip rotary forming machine, comprising a frame body (1) and a material returning unit (2) rotatably connected to the middle position of the outer side of the frame body (1), characterized in that: It also includes a feeding unit (3), a pushing unit (4), a edging unit (5), a bending unit (6), and an arching unit (9). The feeding unit (3), the pushing unit (4), the edging unit (5), and the bending unit (6) are all fixedly installed on the outside of the frame (1) around the unloading unit (2). The edge-trimming unit (5) includes an edge-trimming cylinder (51) and a first guide rail base (52). The edge-trimming cylinder (51) and the first guide rail base (52) are both bolted to the frame (1). The front end of the output shaft of the edge-trimming cylinder (51) is fixedly connected to a first Y-type connector (53). The edge-trimming cylinder (51) is connected to a first connecting plate (56) through the first Y-type connector (53). The upper ends of the first guide rail base (52) are fixedly connected to the two sides of a first linear guide rail. (55), the upper ends of the two first linear guides (55) are movably connected to the first movable blocks (54), the upper ends of the two first movable blocks (54) are connected to the first connecting plate (56), the first connecting plate (56) is fixedly connected to the middle position of the side facing the unloading unit (2) with the edge-collecting rod (57), the front end of the edge-collecting rod (57) is rotatably connected to the edge-collecting pressure head (58), the outer side of the edge-collecting pressure head (58) corresponds to the rotary cavity of the unloading unit (2); The bending unit (6) includes a bending cylinder (61) and a second guide rail base (62). The bending cylinder (61) and the second guide rail base (62) are both bolted to the frame (1). A second Y-type connector (63) is fixedly connected to the front end of the output end of the bending cylinder (61). The bending cylinder (61) is connected to a second connecting plate (66) through the second Y-type connector (63). A second linear guide rail is fixedly connected to both sides of the upper end of the second guide rail base (62). (64), the upper ends of the two second linear guides (64) are movably connected to the second movable blocks (65), the upper ends of the two second movable blocks (65) are connected to the second connecting plate (66), the second connecting plate (66) is fixedly connected to the middle position of the side facing the unloading unit (2) with a bending rod (67), the front end of the bending rod (67) is rotatably connected to a bending head (68), the outer side of the bending head (68) corresponds to the rotary cavity of the unloading unit (2); The edge-gathering unit (5) and the bending unit (6) start synchronously. The corresponding position of the unloading unit (2) is provided with a receiving unit (7). The end of the receiving unit (7) away from the frame (1) is connected to an arching unit (9). The lower end of the unloading unit (2) is fixedly installed with a lower mold body (8) at the corresponding position of the arching unit (9).

2. The fully automatic C4 elastic bar rotational forming machine according to claim 1, characterized in that: The feeding unit (3) includes a receiving base (31), which is bolted to the outside of the frame (1). A first receiving cylinder (32) is fixedly installed at the lower end of the receiving base (31). The output end of the first receiving cylinder (32) extends to the outside through the receiving base (31). Guide rail pairs (33) are provided on both sides of the output end of the first receiving cylinder (32) at the upper end of the receiving base (31). The output end of the first receiving cylinder (32) and the upper end of the guide rail pairs (33) are connected to a mounting frame (34). A receiving frame (35) is installed at an angle on the upper end of the mounting frame (34), and one end of the receiving frame (35) abuts against the rotary cavity of the unloading unit (2).

3. The fully automatic C4 elastic bar rotational forming machine according to claim 2, characterized in that: A limit motor (38) is fixedly connected to the upper end of the mounting bracket (34) near the side of the frame (1). A swing rod (36) is connected to the front end of the output end of the limit motor (38). A limit block (37) is sleeved above the end of the swing rod (36), and the outer side of the limit block (37) abuts against the receiving frame (35).

4. The fully automatic C4 elastic bar rotational forming machine according to claim 1, characterized in that: The pushing unit (4) includes a pushing base (41), which is bolted to the outside of the frame (1). A pushing cylinder (42) is fixedly installed at the end of the pushing base (41) away from the frame (1). A pushing plate (43) is connected to the output end of the pushing cylinder (42) at a position corresponding to the receiving frame (35). The bottom of the pushing plate (43) abuts against the inner cavity of the receiving frame (35), and the width of the pushing plate (43) matches the inner diameter of the receiving frame (35).

5. The fully automatic C4 elastic bar rotational forming machine according to claim 1, characterized in that: The receiving unit (7) includes a horizontal mounting plate (71). A horizontal cylinder (711) is fixedly connected to the upper end of the horizontal mounting plate (71). A third Y-type connector (713) is fixedly connected to the front end of the output shaft of the horizontal cylinder (711). Horizontal linear guides (712) are fixedly connected to both ends of the upper end of the horizontal mounting plate (71) near the frame (1). A third movable block (714) is slidably connected to the upper end of each of the two horizontal linear guides (712). A vertical mounting plate (72) is connected to the upper end of the two third movable blocks (714). The vertical mounting plate (72) is connected to the third Y-type connector (713) via the third Y-type connector (713). 3) Connected to the horizontal cylinder (711), the vertical mounting plate (72) is fixedly connected to the middle position of the side facing the frame (1) with a vertical cylinder (721). The output shaft of the vertical cylinder (721) is fixedly connected to the front end of the fourth Y-type connector (723). Vertical linear guide rails (722) are fixedly installed on both sides of the horizontal mounting plate (71). The outer sides of the two vertical linear guide rails (722) are slidably connected to a movable plate (73). The upper end of the movable plate (73) is connected to the vertical cylinder (721) through the fourth Y-type connector (723). The movable plate (73) corresponds to the discharge port of the unloading unit (2).

6. The fully automatic C4 elastic bar rotational forming machine according to claim 5, characterized in that: The movable plate (73) is fixedly mounted with a fourth movable block (731) matching the vertical linear guide rail (722) at both ends of one side facing the vertical mounting plate (72). The movable plate (73) is slidably connected to the outside of the vertical mounting plate (72) through the fourth movable block (731). The end of the movable plate (73) facing the frame (1) is rotatably connected to an adjustment plate (732). Two opposing second receiving cylinders (733) are installed on the outside of the adjustment plate (732). The output ends of the two second receiving cylinders (733) are fixedly connected to grippers (734), and the distance between the two grippers (734) matches the size of the rotary cavity of the unloading unit (2).

7. The fully automatic C4 elastic strip rotational forming machine according to claim 1, characterized in that: The arching unit (9) includes a fixed base (91). A third guide rail base (92) is fixedly installed at the upper end of the fixed base (91) near the receiving unit (7). A third linear guide rail (93) is installed on both sides of the upper end of the third guide rail base (92). An upper mold mounting plate (94) is provided at the upper end of the third guide rail base (92). A fifth movable block (941) is fixedly connected at the lower end of the upper mold mounting plate (94) corresponding to the third linear guide rail (93). 94) The fifth movable block (941) is slidably connected to the third linear guide rail (93). The upper end of the fixed seat (91) is equipped with an arching cylinder (95) on the side away from the receiving unit (7). The output end of the arching cylinder (95) is connected to the fifth Y-type connector (96). The other end of the fifth Y-type connector (96) is fixedly connected to the upper mold mounting plate (94). The upper mold mounting plate (94) facing the receiving unit (7) is fixedly installed with the upper mold body (10) at the corresponding position of the lower mold body (8).

8. A molding method for a fully automatic C4 elastic bar rotary molding machine according to any one of claims 1-7, characterized in that: Includes the following steps: The bar stock is placed into the inner cavity of the feeding unit (3). The feeding unit (4) pushes the bar stock located in the inner cavity of the feeding unit (3) into the rotary cavity of the unloading unit (2) to complete the feeding. The unloading unit (2) starts to rotate until it contacts the edge-gathering unit (5) and the bending unit (6). The edge-gathering unit (5) and the bending unit (6) start at the same time to force the bar stock to wind according to the mold shape. The edge-gathering unit (5) presses the bar stock onto the unloading unit (2) to complete the edge-gathering forming material. The bending unit (6) is on the spring bar. After the bending and forming are completed, the "e-shaped" forming of the elastic bar is completed. The edge-retracting unit (5) and the bending unit (6) retract simultaneously. The material ejection unit (2) pushes the formed elastic bar outward. The material receiving unit (7) clamps and moves it to the inner cavity of the lower mold body (8). Then, the arching unit (9) pushes the upper mold body (10) forward until it matches the lower mold body (8), completing the arching forming of the elastic bar. At the same time, the arching unit (9) and the material receiving unit (7) return to their original positions, and the forming of the C4 elastic bar is completed.

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