Alternating feed device and method of feeding

Abstract

The present application relates to the technical field of machining, and particularly relates to an alternating feeding device and a feeding method thereof. The device comprises a stamping device and a feeding device connected to one side of the stamping device. The stamping device comprises a stamping head and a female die. The stamping head and the female die are correspondingly arranged. The feeding device comprises a feeding mechanism workbench, a first feeding mechanism and a second feeding mechanism. The first feeding mechanism and the second feeding mechanism are slidingly arranged on the workbench top. The first feeding mechanism and the second feeding mechanism are the same in structure and are mirror image arranged. The first feeding mechanism and the second feeding mechanism alternately clamp the finished product and leave the stamping device. The present application can save cost, reduce manual operation, improve production efficiency and safety performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, and in particular to an alternate feeding device and a feeding method thereof. BACKGROUND

[0002] At present, when the stamping device is stamping, the operator manually puts the parts to be stamped on the die of the stamping device, withdraws the hand, and then starts the stamping device to perform the stamping action. After the stamping is completed, the upper die is withdrawn, the ejector pin ejects the finished product part after stamping, and the operator manually takes out the finished product part after stamping. Such reciprocating action completes the stamping production. This repeated manual operation is not only inefficient, but also prone to production delays due to human factors, resulting in increased costs. On the other hand, the stamping device has many safety hazards during production, and the operator is prone to injury accidents during operation.

[0003] Therefore, the present application provides an alternate feeding device and a feeding method thereof, which saves costs, reduces manual operation, and improves production efficiency and safety performance. SUMMARY

[0004] The present application aims to solve the problems in the prior art and provides an alternate feeding device and a feeding method thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] An alternate feeding device, comprising a stamping device and a feeding device connected to one side of the stamping device, the stamping device comprising a stamping head and a female die, the stamping head and the female die being correspondingly arranged, the feeding device comprising a feeding mechanism workbench, a first feeding mechanism and a second feeding mechanism,

[0007] The feeding mechanism workbench is provided with a guide assembly on the feeding mechanism workbench surface in symmetry with the feeding mechanism workbench central axis, the guide assembly comprising an elongated guide slot, a guide rail and a special-shaped guide slot, the elongated guide slot, the guide rail and the special-shaped guide slot being arranged in sequence on both sides of the feeding mechanism workbench central axis;

[0008] The first feeding mechanism and the second feeding mechanism are respectively slidably arranged on the guide assembly on the feeding mechanism workbench surface, and the first feeding mechanism and the second feeding mechanism are the same in structure and are mirror image arranged;

[0009] Further comprising a controller for controlling the first feeding mechanism and the second feeding mechanism to clamp the finished product away from the stamping device after stamping.

[0010] Further, the first feeding mechanism comprises a pushing cylinder, a guide roller, a mechanical claw guide plate and a mechanical claw, the bottom end of the mechanical claw guide plate is connected with a pushing connecting block, the pushing connecting block is fixedly connected with the pushing connecting block, the top end of the mechanical claw guide plate is slidably connected with the mechanical claw, and the mechanical claw guide plate moves left and right away from the pushing connecting block in the U-shaped groove.

[0011] Further, the guide roller reciprocatingly rolls in the special-shaped guide groove, the mechanical claw guide plate reciprocatingly slides on the guide rail, and the pushing connecting block reciprocatingly slides in the long strip-shaped guide groove.

[0012] Further, the guide roller comprises a rolling bearing and a bearing rod, the bottom end of the bearing rod is rotatably connected with the rolling bearing, the top end of the bearing rod is fixedly connected with the mechanical claw, the rolling bearing rolls on the wall of the special-shaped guide groove, and the mechanical claw moves along the path of the special-shaped guide groove under the driving of the guide roller.

[0013] Further, the special-shaped guide groove gradually approaches the guide rail from the middle to both ends.

[0014] Further, the special-shaped guide groove comprises a flared guide section, a straight avoiding section and a tapered guide section, the front part of the flared guide section is parallel to the guide rail, the rear part gradually approaches the straight avoiding section, the straight avoiding section is parallel to the guide rail, and the front part of the tapered guide section gradually approaches the guide rail, and the rear part is parallel to the guide rail.

[0015] Further, the mechanical claw is connected with a clamping claw, when the mechanical claw guide plate moves to the end of the special-shaped guide groove, the clamping claw corresponds to the female die.

[0016] Further, the front and rear ends of the mechanical claw are not on the same axis, and the clamping claw is adapted to the shape of the grabbed part.

[0017] Further, the feeding mechanism workbench top is provided with a first sensing switch and a second sensing switch for sensing the mechanical claw at the upper and lower ends of the central axis, and the first sensing switch and the second sensing switch are signal connected with the controller.

[0018] Further, a feeding method comprises an alternating feeding device, before stamping, the initial position of the first feeding mechanism is close to the second sensing switch, the initial position of the second feeding mechanism is close to the first sensing switch, the part to be stamped is placed in the female die, and the alternating feeding comprises the following steps:

[0019] Step 1: after the part to be stamped is stamped into a finished part, the second feeding mechanism triggers the first sensing switch when the finished part is withdrawn along the guide assembly, and the signal is transmitted to the controller, and the controller controls the movement of the first feeding mechanism.

[0020] Step 2: under the push of the push cylinder, the first feeding mechanism moves along the special-shaped guide groove, guide rail and long strip-shaped guide groove to the direction of the stamping device, and intersects with the second feeding mechanism that is retracted, at the same time, the part to be stamped is placed in the female die, and the stamping device performs a stamping action;

[0021] Step 3: after the part to be stamped is stamped into a finished product again, the first feeding mechanism moves to the upper side of the female die, and the second feeding mechanism is retracted to the flaring guide section, and the second inductive switch limits the position of the second feeding mechanism;

[0022] Step 4: when the mechanical claw of the first feeding mechanism clamps the finished product and retracts, the first inductive switch is triggered;

[0023] Step 5: the controller controls the second feeding mechanism to move again to the stamping device along the corresponding guide assembly, the stamping device performs a stamping action again, the first feeding mechanism intersects with the second feeding mechanism again, the first feeding mechanism is limited in position by the second inductive switch and stops moving at the flaring guide section, and the second feeding mechanism clamps the finished product again and returns to step 1;

[0024] Step 6: steps 1-5 are repeated to form an alternating type of circulating feeding until the stamping work of all parts to be stamped is completed;

[0025] In step 2, step 21 is further included: when the second feeding mechanism is retracted to the straight line avoiding section, the first feeding mechanism and the second feeding mechanism realize path avoidance in the straight line avoiding sections of the two groups of special-shaped guide grooves.

[0026] Compared with the prior art, the alternating type of feeding device and the feeding method thereof provided by the application have the advantages that:

[0027] 1. A simple mechanical structure is adopted, operation is convenient, manufacturing and maintenance costs are reduced, and the reliability and stability of the device are improved;

[0028] 2. Two mechanical claws are used to realize feeding in a reciprocating manner, which greatly improves the work efficiency. The double mechanical claws convey materials in an uninterrupted cycle, reducing the production interruption caused by manual material replacement. The reciprocating movement of the mechanical claws is simple and efficient, which can ensure accurate material conveying while maintaining high speed, which is crucial for improving overall production efficiency;

[0029] 3. The mechanical claw replaces manual material replacement, which can ensure that human intervention is reduced in a high-repetition environment, thereby reducing the risk of work accidents and minimizing the incidence of safety accidents, and also reducing the labor intensity of workers. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1Assembling structure schematic view of the present application;

[0031] Figure 2 Top view of the feeding device of the present application;

[0032] Figure 3 Structure schematic view of the first feeding mechanism from the first perspective;

[0033] Figure 4 Structure schematic view of the first feeding mechanism from the second perspective;

[0034] Figure 5 Top view of the feeding mechanism workbench;

[0035] In the figure: 1, the first feeding mechanism, 11, the pushing air cylinder, 12, the guide rolling element, 13, the mechanical claw guide plate, 131, the pushing connecting block, 14, the mechanical claw, 141, the clamping claw,

[0036] 2, the second feeding mechanism,

[0037] 3, the feeding mechanism workbench, 31, the long strip-shaped guide groove, 32, the guide rail, 33, the special-shaped guide groove,

[0038] 331, the flared guide section, 332, the straight line avoiding section, 333, the pinched guide section,

[0039] 4, the stamping equipment, 5, the female die, 6, the stamping head,

[0040] 71, the first inductive switch, 72, the second inductive switch. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] Example 1, refer to Figure 1 and Figure 2The application relates to an alternating feeding device, which comprises a stamping device 4 and a feeding device connected to one side of the stamping device 4, wherein the stamping device 4 comprises a stamping head 6 and a female die 5, the stamping head 6 and the female die 5 are correspondingly arranged, the feeding device comprises a feeding mechanism workbench 3, a first feeding mechanism 1 and a second feeding mechanism 2, and the feeding mechanism workbench 3 is provided with a guide assembly on the surface of the feeding mechanism workbench 3 in the axis symmetry of the feeding mechanism workbench 3.

[0044] The guide assembly comprises long-strip-shaped guide grooves 31, guide rails 32 and special-shaped guide grooves 33, and the long-strip-shaped guide grooves 31, the guide rails 32 and the special-shaped guide grooves 33 are arranged in sequence on both sides of the axis of the feeding mechanism workbench 3.

[0045] The first feeding mechanism 1 and the second feeding mechanism 2 are respectively slidably arranged on the guide assembly on the surface of the feeding mechanism workbench 3, and the first feeding mechanism 1 and the second feeding mechanism 2 are the same in structure and are mirror-symmetrically arranged.

[0046] The application further comprises a controller which controls the first feeding mechanism 1 and the second feeding mechanism 2 to alternately and sequentially clamp the stamping finished products and separate the stamping finished products from the stamping device 4. In the embodiment, the stamping device 4 is a device in the prior art, a corresponding ejector pin is arranged at the lower end of the female die 5, the ejector pin is ejected after the stamping head 6 finishes stamping, and the stamping finished product is ejected from the female die. The controller can be integrated in the control system of the stamping device, thereby reducing the physical space occupation.

[0047] Through the arrangement of the above scheme, the first feeding mechanism 1 and the second feeding mechanism 2 alternately clamp the stamping finished products and separate the stamping finished products from the stamping device 4, thereby reducing the idle time of the stamping device 4 and improving the product output rate.

[0048] In the embodiment, in order to make the first feeding mechanism 1 and the second feeding mechanism 2 more conveniently slide on the surface of the feeding mechanism workbench 3, two groups of guide rails 32 are fixedly connected to the surface of the feeding mechanism workbench 3 through bolts, and two groups of special-shaped guide grooves 33 and long-strip-shaped guide grooves 31 are arranged on the feeding mechanism workbench 3 or penetrate through the feeding mechanism workbench 3, and the two ends of the special-shaped guide grooves 33 and the long-strip-shaped guide grooves 31 are smoothly connected through arcs.

[0049] As shown in Embodiment 2, Figure 3 and Figure 4 the first feeding mechanism 1 comprises a pushing air cylinder 11, a guide rolling part 12, a mechanical claw guide plate 13 and a mechanical claw 14, the bottom end of the mechanical claw guide plate 13 is connected with a pushing connecting block 131, the pushing air cylinder 11 is fixedly connected with the pushing connecting block 131 at the telescopic end, the top end of the mechanical claw guide plate 13 is slidably connected with the mechanical claw 14, a U-shaped groove is arranged through the side of the mechanical claw guide plate 13 away from the pushing connecting block 131, and the guide rolling part 12 moves leftward and rightward in the U-shaped groove.

[0050] The guiding rolling member 12 reciprocally rolls in the special-shaped guiding groove 33, the mechanical claw guiding plate 13 is fixedly connected with a sliding block at the bottom plane, and the sliding block is slidingly connected on the guide rail 32, so that the mechanical claw guiding plate 13 reciprocally slides on the guide rail 32, and the pushing connecting block 131 reciprocally slides in the long strip-shaped guiding groove 31 under the pushing of the pushing cylinder 11.

[0051] The guiding rolling member 12 comprises a rolling bearing and a bearing rod, the lower end of the bearing rod is rotationally connected with the rolling bearing, and the upper end of the bearing rod is fixedly connected with the mechanical claw 14; the rolling bearing rolls on the groove wall of the special-shaped guiding groove 33, and the mechanical claw 14 moves along the path of the special-shaped guiding groove 33 under the driving of the guiding rolling member 12. The shape of the rolling bearing is matched with the two end circular arcs of the special-shaped guiding groove 33.

[0052] In the embodiment, the pushing cylinder 11 is electrically connected with the controller, the pushing cylinder 11 is threadedly connected with the pushing connecting block 131, the pushing connecting block 131 is driven to move when the pushing cylinder 11 is extended, the pushing connecting block 131 is fixedly connected with the mechanical claw guiding plate 13, so that the mechanical claw guiding plate 13 is driven to move when the pushing connecting block 131 moves. The U-shaped groove on the mechanical claw guiding plate 13 limits the position of the bearing rod, the mechanical claw guiding plate 13 drives the bearing rod to move, and the upper end of the bearing rod is fixedly connected with the mechanical claw 14 through a threaded pair, so that the mechanical claw guiding plate 13 drives the mechanical claw 14 to move.

[0053] In order to facilitate the sliding connection between the first feeding mechanism 1 and the second feeding mechanism 2 and the feeding mechanism workbench 3, and to ensure that the first feeding mechanism 1 and the second feeding mechanism 2 can stably move forward and backward and that the mechanical claw 14 in the first feeding mechanism 1 and the mechanical claw 14 in the second feeding mechanism 2 do not interfere and collide with each other, the special-shaped guiding groove 33 is arranged to gradually approach the guide rail 32 from the middle to the two ends.

[0054] In order to ensure that the clamping claw 141 can clamp the finished product in the female die 5, the clamping claw 141 is connected at the end of the mechanical claw 14, and the clamping claw 141 corresponds to the female die 5 when the mechanical claw guiding plate 13 moves to the end of the special-shaped guiding groove 33 close to the stamping device 4.

[0055] In the embodiment, as Figure 5As shown, the specific profiled guide groove 33 is designed as follows: the profiled guide groove 33 includes a flared guide section 331, a straight avoiding section 332 and a tapered guide section 333. The front part of the flared guide section 331 is parallel to the guide rail 32, and the rear part gradually approaches the straight avoiding section 332. The straight avoiding section 332 is parallel to the guide rail 32. The front part of the tapered guide section 333 gradually approaches the guide rail 32, and the rear part is parallel to the guide rail 32. The guide rolling part 12 can only move along the path of the profiled guide groove 33. When the guide rolling part 12 moves close to the stamping device 4 in the flared guide section 331, it can drive the mechanical claw 14 to move to the side of the feeding mechanism workbench 3. When the guide rolling part 12 rolls in the straight avoiding section 332, it drives the mechanical claw 14 to move linearly. When the guide rolling part 12 moves close to the stamping device 4 in the tapered guide section 333, it drives the clamping jaw 141 of the mechanical claw 14 to approach the female die 5. The path of the profiled guide groove 33 can prevent the first feeding mechanism 1 and the second feeding mechanism 2 from colliding when they feed alternately, and can accurately feed the parts to be stamped into the female die 5. It can be understood that the first feeding mechanism 1 and the second feeding mechanism 2 meet at the widest part of the profiled guide groove 33, that is, the straight avoiding section 332 of the two profiled guide grooves 33 can avoid collision.

[0056] In order to better grasp the parts to be stamped, the front and rear ends of the mechanical claw 14 are not on the same axis, and the clamping jaw 141 is adapted to the shape of the parts to be grasped. In this embodiment, the parts to be stamped are circular, and the clamping jaw 141 is Figure 2 As shown, the clamping jaw 141 is circular after being closed. The clamping jaw 141 is controlled by the controller to open and close.

[0057] In this embodiment, the parts to be stamped can be placed in the female die 5 manually, or placed in an automatic manner, such as by a robot. When the clamping jaw 141 clamps the finished part, the female die 5 in the stamping device 4 is provided with a centering device, which can be realized by using existing technology. After the clamping jaw 141 grasps the finished part and retreats, the finished part can be taken out manually or by a robot. In another embodiment, after the clamping jaw 141 grasps the finished part and retreats to the position, a through hole through which the finished part can fall is arranged at the corresponding position of the clamping jaw 141 on the feeding mechanism workbench 3. A collection frame is placed below the through hole of the feeding mechanism workbench 3, and the finished part is collected in the collection frame.

[0058] In order to accurately control the back-and-forth movement of the first feeding mechanism 1 and the second feeding mechanism 2, the feeding mechanism workbench 3 is provided with a first sensing switch 71 and a second sensing switch 72 at the upper and lower ends of the central axis for sensing the mechanical claw 14. The first sensing switch 71 and the second sensing switch 72 are signal connected with the controller.

[0059] The first induction switch 71 senses the first feeding mechanism 1 and sends a signal to the controller to stop the first feeding mechanism 1 from running. After the stamping action is completed, the clamping jaw 141 grabs the finished product and moves away. When the first induction switch 71 senses that the first feeding mechanism 1 has moved away, it sends a signal to the controller again. The controller controls the corresponding push cylinder 11 of the second feeding mechanism 2 to push the second feeding mechanism 2 forward to run. At the same time, the stamping device places the parts to be stamped and performs the stamping action. The first feeding mechanism 1 and the second feeding mechanism 2 avoid each other at the linear avoidance section 332 of the special-shaped guide groove 33. When the first feeding mechanism 1 retreats to the flared guide section 331, the second induction switch 72 limits the position of the first feeding mechanism 1. After the parts to be stamped in the stamping device are stamped into finished products and are ejected, the second feeding mechanism 2 moves above the female die. After the second feeding mechanism 2 retreats after grabbing the finished product, the first induction switch 71 senses that the second feeding mechanism 2 has moved away and sends a signal to the controller to make the first feeding mechanism 1 move towards the stamping device 4 again. The first feeding mechanism 1 and the second feeding mechanism 2 avoid each other again at the linear avoidance section 332 of the special-shaped guide groove 33. The stamping device performs the stamping action again. The first feeding mechanism 1 retreats to the flared guide section 331. After the second feeding mechanism 2 grabs the finished product and moves away from the female die 5, the first feeding mechanism moves towards the stamping device 4 again. The first feeding mechanism 1 and the second feeding mechanism 2 alternately cycle to clamp and move away the finished product in the female die 5.

[0060] It can be understood that the first feeding mechanism 1 and the second feeding mechanism 2 have the same action process. Both are pushed by the corresponding push cylinder 11, sensed by the first induction switch 71, and limited by the second induction switch 72.

[0061] In embodiment 5, a feeding method includes an alternating feeding device as described above. Before stamping, the initial position of the first feeding mechanism 1 is close to the second induction switch 72, and the initial position of the second feeding mechanism 2 is close to the first induction switch 71. The parts to be stamped are placed in the female die 5. The alternating feeding includes the following steps:

[0062] Step 1: After the parts to be stamped are stamped into finished products, the second feeding mechanism 2 triggers the first induction switch 71 when it retreats along the guide assembly. The signal is transmitted to the controller, and the controller controls the movement of the first feeding mechanism 1.

[0063] Step 2: Under the push of the push cylinder 11, the first feeding mechanism 1 moves towards the stamping device along the special-shaped guide groove 33, the guide rail 32, and the long strip-shaped guide groove 31, intersects with the retreating second feeding mechanism 2, and at the same time, places the parts to be stamped in the female die 5. The stamping device performs the stamping action.

[0064] Step 3: After the punched part is punched into a finished part again, the first feeding mechanism 1 moves above the female die 5, the second feeding mechanism 2 retreats to the flaring guide section 331, and the second inductive switch 72 limits the position of the second feeding mechanism 2;

[0065] Step 4: When the mechanical gripper 14 of the first feeding mechanism 1 clamps the finished part to retreat, the first inductive switch 71 is triggered;

[0066] Step 5: The controller controls the second feeding mechanism 2 to move along the corresponding guide assembly to the punching device again, the punching device performs the punching action again, the first feeding mechanism 1 and the second feeding mechanism 2 intersect again, the first feeding mechanism 1 is limited by the second inductive switch 72 to stop moving at the flaring guide section 331, and the second feeding mechanism 2 clamps the finished part again to return to step 1;

[0067] Step 6: Steps 1-5 are repeated to form an alternating type of cycle feeding until the punching work of all punched parts is completed;

[0068] In step 2, step 21 is further included: when the second feeding mechanism 2 retreats to the linear avoidance section 332, the first feeding mechanism 1 and the second feeding mechanism 2 realize path avoidance in the linear avoidance section 332 of the two groups of special-shaped guide grooves 33.

[0069] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An alternate feeding device comprising a stamping apparatus (4) and a feeding device connected to one side of the stamping apparatus (4), the stamping apparatus (4) comprising a punch head (6) and a female die (5) disposed in correspondence, characterized in that: The feeding device includes a feeding mechanism workbench (3), a first feeding mechanism (1), and a second feeding mechanism (2); the feeding mechanism workbench (3) is provided with a guide assembly on the workbench surface in the middle axis of the feeding mechanism workbench (3) in a symmetrical manner, the guide assembly includes an elongated guide slot (31), a guide rail (32), and a special-shaped guide slot (33), the elongated guide slot (31), the guide rail (32), and the special-shaped guide slot (33) are arranged in sequence on both sides of the middle axis of the feeding mechanism workbench (3); the first feeding mechanism (1) and the second feeding mechanism (2) are respectively slidably arranged on the guide assembly on the workbench surface of the feeding mechanism workbench (3), the first feeding mechanism (1) and the second feeding mechanism (2) are the same in structure and are mirror-symmetrically arranged; and the device further includes a controller for controlling the first feeding mechanism (1) and the second feeding mechanism (2) to alternately and sequentially clamp the finished product after stamping away from the stamping device (4); The first feeding mechanism (1) includes a pushing air cylinder (11), a guide rolling element (12), a mechanical claw guide plate (13), and a mechanical claw (14), one side of the bottom end of the mechanical claw guide plate (13) is connected with a pushing connecting block (131), the telescopic end of the pushing air cylinder (11) is fixedly connected with the pushing connecting block (131), the top end of the mechanical claw guide plate (13) is slidably connected with the mechanical claw (14), and the side, away from the pushing connecting block (131), of the mechanical claw guide plate (13) is provided with a U-shaped groove in a penetrating manner; the guide rolling element (12) moves leftward and rightward in the U-shaped groove; The guide rolling element (12) reciprocally rolls in the special-shaped guide slot (33), the mechanical claw guide plate (13) reciprocally slides on the guide rail (32), and the pushing connecting block (131) reciprocally slides in the elongated guide slot (31); The guide rolling element (12) includes a rolling bearing and a bearing rod, the lower end of the bearing rod is rotatably connected with the rolling bearing, the upper end of the bearing rod is fixedly connected with the mechanical claw (14), the rolling bearing rolls on the groove wall of the special-shaped guide slot (33), and the mechanical claw (14) moves along the special-shaped guide slot (33) under the driving of the guide rolling element (12); The special-shaped guide slot (33) gradually approaches the guide rail (32) from the middle to the two ends; The mechanical claw (14) is connected with a clamping claw (141) at the tail end, when the mechanical claw guide plate (13) moves to the tail end of the special-shaped guide slot (33), the clamping claw (141) corresponds to the female die (5).

2. An alternating feed device according to claim 1, characterized in that The special-shaped guide slot (33) includes a flared guide section (331), a straight-line avoiding section (332), and a tapered guide section (333), the front part of the flared guide section (331) is parallel to the guide rail (32), the rear part gradually approaches the straight-line avoiding section (332), the straight-line avoiding section (332) is parallel to the guide rail (32), and the front part of the tapered guide section (333) gradually approaches the guide rail (32), and the rear part is parallel to the guide rail (32).

3. An alternating feed device according to claim 1, characterized in that: The mechanical claw (14) is not on the same axis at both ends, and the clamping claw (141) is shape-fitted with the grabbed part.

4. An alternating feed device according to claim 2, characterized in that: The feeding mechanism workbench (3) is provided with a first induction switch (71) and a second induction switch (72) for sensing the mechanical claw (14) at the upper and lower ends of the central axis, and the first induction switch (71) and the second induction switch (72) are signal-connected with the controller.

5. A method of feeding material using an alternating feed device as claimed in claim 4, characterized in that: Before stamping, the initial position of the first feeding mechanism (1) is close to the second induction switch (72), and the initial position of the second feeding mechanism (2) is close to the first induction switch (71), and the parts to be stamped are placed in the female die (5), and the alternate feeding includes the following steps: Step 1: After the parts to be stamped are stamped into finished parts, the second feeding mechanism (2) triggers the first induction switch (71) when it is withdrawn along the guide assembly, and the signal is transmitted to the controller, and the controller controls the movement of the first feeding mechanism (1); Step 2: Under the push of the push cylinder (11), the first feeding mechanism (1) moves along the special-shaped guide groove (33), the guide rail (32) and the long strip-shaped guide groove (31) to the direction of the stamping device, and intersects with the second feeding mechanism (2) withdrawn, and at the same time, the parts to be stamped are placed in the female die (5), and the stamping device performs the stamping action; Step 3: After the parts to be stamped are stamped into finished parts again, the first feeding mechanism (1) moves to above the female die (5), and the second feeding mechanism (2) is withdrawn to the flaring guide section (331), and the second induction switch (72) limits the position of the second feeding mechanism (2); Step 4: When the mechanical claw (14) of the first feeding mechanism (1) withdraws the finished parts, the first induction switch (71) is triggered; Step 5: The controller controls the second feeding mechanism (2) to move to the stamping device again along the corresponding guide assembly, the stamping device performs the stamping action again, the first feeding mechanism (1) and the second feeding mechanism (2) intersect again, the first feeding mechanism (1) is limited by the second induction switch (72) to stop moving in the flaring guide section (331), and the second feeding mechanism (2) withdraws the finished parts again, and returns to step 1; Step 6: Repeat steps 1-5 to form an alternating cycle feeding until all the parts to be stamped are stamped; In step 2, step 21 is further included: when the second feeding mechanism (2) is withdrawn to the straight-line avoiding section (332), the first feeding mechanism (1) and the second feeding mechanism (2) realize path avoidance in the straight-line avoiding section (332) of the two groups of special-shaped guide grooves (33).

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