Rotary feeding tray automatic punch press

Abstract

The present invention discloses a fully automatic punching machine with a rotary feed plate, comprising a punching machine base, a punch driven by a hydraulic cylinder, a rotary feed plate driven by a rotary power motor and rotating relative to the punching machine base, a mold arranged in a circle and with equal spacing arranged on the rotary feed plate, the mold being used to place workpieces to be processed, and a material taking device for taking the processed workpieces from the mold on the punching machine base; the hydraulic cylinder, the rotary power motor, and the material taking device are all connected to the controller signal. When the fully automatic punching machine with a rotary feed plate of the present invention is actually used, the production efficiency is high and the safety is good.

Description

Technical Field

[0001] The invention belongs to the field of machinery, and in particular relates to a fully automatic punching machine with a rotary feeding tray. Background Art

[0002] At present, in the production process of bellows, the bellows manufacturers use the punching machine to expand the important accessory "interface flange".

[0003] The punch press is equipped with a corresponding mold. The worker manually places the interface flange on the mold and steps on the control pedal (the pedal controls the work of the punch head). The punch of the punch press presses down on the mold to complete the expansion. Then the expanded interface flange is manually removed from the mold. The above actions are repeated in sequence. This requires the coordination of the worker's hands and feet with the machine. This cycle is not only inefficient, but also prone to safety accidents. Because placing the interface flange and removing the processed interface flange requires reaching into the punching part of the punch press, which is quite dangerous. If the worker is slightly negligent, it is easy for the punch to break the finger. Therefore, there are great safety hazards, which will cause serious consequences and economic losses.

[0004] The punching machine also needs to add lubricating oil to the punch head regularly during use, so as to facilitate the demoulding of the interface flange after stamping. For safety reasons, the punching machine needs to be turned off at this time. This further leads to low production efficiency. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a fully automatic punching machine with a rotary feeding tray having high safety and high production efficiency.

[0006] In order to solve the above technical problems, the present invention provides a fully automatic punching machine with a rotary feed plate, comprising a punching machine base, on which a punch driven by a hydraulic cylinder is provided; and on the punching machine base, there is also provided a rotary feed plate driven by a rotary power motor and rotating relative to the punching machine base;

[0007] The rotating feeding plate is provided with molds arranged in a circle and with equal spacing, and the molds are used to place the workpieces to be processed. The punch base is also provided with a material taking device for taking the processed workpieces from the molds;

[0008] The hydraulic cylinder, the rotary power motor and the material taking device are all connected with the controller signal.

[0009] As an improvement of the rotary feed tray automatic punch press of the present invention: the material taking device comprises a horizontal cylinder, a vertical cylinder and a clamp cylinder, the cylinder body of the horizontal cylinder is fixed on the punch press base, the cylinder body of the vertical cylinder is connected to the cylinder rod of the horizontal cylinder, and the cylinder body of the clamp cylinder is connected to the cylinder rod of the vertical cylinder; the clamp for grabbing the workpiece is connected to the cylinder rod of the clamp cylinder;

[0010] The horizontal cylinder, vertical cylinder and clamp cylinder are all connected to the controller signal.

[0011] As a further improvement of the rotary feed tray full-automatic punch press of the present invention: an atomizing oil spraying device is also provided on the punch press base, the atomizing oil spraying device comprises an atomizing nozzle, an L-shaped connecting rod and a nozzle cylinder, and the atomizing nozzle is connected to an oil supply tank provided with a pressure pump through an oil pipe;

[0012] The corner of the L-shaped connecting rod is rotatably connected to the punch press base through a rotating shaft, the connecting rod of the nozzle cylinder is fixedly connected to the short side of the L-shaped connecting rod, and the atomizing nozzle is fixedly connected to the long side of the L-shaped connecting rod; the atomizing nozzle in the fuel injection working condition is directly facing the punch;

[0013] The nozzle cylinder and the pressure pump of the oil supply tank are all connected to the controller signal.

[0014] As a further improvement of the rotary feeding tray fully automatic punching machine of the present invention:

[0015] A precise positioning device is also provided on the punch press base, and the precise positioning device comprises a positioning device base fixed on the punch press base;

[0016] An upper limit sensing switch and a lower limit sensing switch are respectively provided on the base of the positioning device, both of which are connected to the base of the positioning device for sliding up and down. The upper limit sensing switch and the lower limit sensing switch are used to limit the stroke of the hydraulic cylinder; the upper locking hand wheel is used to fix the upper limit sensing switch on the base of the positioning device, and the lower locking hand wheel is used to fix the lower limit sensing switch on the base of the positioning device;

[0017] The upper limit sensing switch and the lower limit sensing switch are both connected to the controller signal.

[0018] As a further improvement of the rotary feeding tray fully automatic punching machine of the present invention:

[0019] Twelve molds arranged in a circle and with equal spacing are arranged on the rotating feeding disk; the angle formed by two adjacent molds and the axis of the rotating feeding disk is 30°.

[0020] As a further improvement of the rotary feeding plate full-automatic punching machine of the present invention: a material receiving trough is provided below the clamp.

[0021] The invention can solve the defects of the original punch press.

[0022] The present invention adds an automatic rotating feeding plate, an automatic oil spraying device, an automatic material taking device, a precise positioning device, and a controller to the original punching machine.

[0023] The diameter of the rotating feeder is 1 meter, with 12 workstations (12 molds) on it. It will automatically rotate 30 degrees each time according to the beat, and send the interface flange to the punching part (punch) of the punch press to work. After the punching is completed, the rotating feeder will rotate 30 degrees again; the material removal device will remove the punched flange and place it in the material box (receiving trough), and the worker only needs to put the material at the farthest end of the rotating feeder away from the punch, which is highly efficient and safe. The punch head can be automatically sprayed with lubricating oil without stopping the machine. The punching depth of the workpiece can be accurately positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the main view;

[0027] Figure 3 yes Figure 1 A side view schematic diagram of

[0028] Figure 4 is an enlarged schematic diagram of the material taking device 5;

[0029] Figure 5 It is an enlarged schematic diagram of the atomizing oil spraying device 9.

[0030] Figure 6 It is an enlarged schematic diagram of the precise positioning device 10 . DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto:

[0032] Embodiment 1: A fully automatic punching machine with a rotary feeding tray, such as Figure 1 to Figure 6 As shown, it includes a punch press base 1 , on which a rotary power motor 2 is provided, and the rotary power motor 2 is connected to the rotating shaft of a rotary feed tray 4 , thereby driving the rotary feed tray 4 to rotate relative to the punch press base 1 .

[0033] A punch 7 driven by a hydraulic cylinder 8 is provided above the rotating feeding tray 4 ; the cylinder body of the hydraulic cylinder 8 is fixed on the punch press base 1 .

[0034] The rotating feeding plate 4 is provided with molds 3 arranged in a circle and at equal intervals, that is, the centers of the molds 3 form a circle, which is concentric with the axis of the rotating feeding plate 3; the angles formed by two adjacent molds 3 and the axis of the rotating feeding plate 4 are equal. When there are 12 molds 3, the angle is 30°.

[0035] A material taking device 5 is also provided on the punch press base 1. The material taking device 5 includes a horizontal cylinder 51, a vertical cylinder 52 and a clamp cylinder 53.

[0036] The cylinder body of the horizontal cylinder 51 is fixed on the punch press base 1, the cylinder body of the vertical cylinder 52 is connected to the cylinder rod of the horizontal cylinder 51, and the cylinder body of the clamp cylinder 53 is connected to the cylinder rod of the vertical cylinder 52. The clamp 54 for grabbing the workpiece is connected to the cylinder rod of the clamp cylinder 53. A material receiving trough 55 is provided below the clamp 54.

[0037] Each time the rotary feed tray 4 rotates (ie, each time one station is rotated), the mold 3 of one station is rotated to be located directly below the punch 7 , and simultaneously the mold 3 of another station is rotated to be directly opposite to the clamp 54 .

[0038] The workstation corresponding to the clamp 54 and the workstation corresponding to the punch 7 form an angle of 90°.

[0039] The punch press base 1 is also provided with an atomizing oil spray device 9, which includes an atomizing nozzle 91, an L-shaped connecting rod 92, and a nozzle cylinder 94. The atomizing nozzle 91 is connected to an oil supply tank provided with a pressure pump through an oil pipe; the oil supply tank is responsible for providing lubricating oil. For the clarity of the drawing, the connection relationship between the atomizing nozzle 91 and the oil supply tank is omitted in the figure.

[0040] The corner of the L-shaped connecting rod 92 (the connection point between the long side and the short side of the L-shaped connecting rod 92) is rotatably connected to the punch base 1 through the rotating shaft 93, the connecting rod of the nozzle cylinder 94 is fixedly connected to the short side of the L-shaped connecting rod 92, and the atomizing nozzle 91 is fixedly connected to the long side of the L-shaped connecting rod 92. When the connecting rod of the nozzle cylinder 94 performs telescopic movement, it drives the L-shaped connecting rod 92 to rotate around the rotating shaft 93, thereby driving the atomizing nozzle 91 to rotate. When the atomizing nozzle 91 is not working, the connecting rod of the nozzle cylinder 94 extends to the maximum position, at which time the atomizing nozzle 91 is away from the punch 7; when the atomizing nozzle 91 needs to spray oil, the connecting rod of the nozzle cylinder 94 retracts to the bottom, at which time the atomizing nozzle 91 is facing the punch 7 (such as Figure 5 The dotted line in the figure shows the position of the

[0041] A controller 6 is also provided on the punch press base 1, and the controller 6 is respectively connected to the rotary power motor 2, the hydraulic cylinder 8, the horizontal cylinder 51, the vertical cylinder 52, the clamp cylinder 53, the nozzle cylinder 94, and the pressure pump signal of the oil supply tank through corresponding signal lines. The signal lines are all hidden in the signal line protection cover 61.

[0042] A precise positioning device 10 is also provided on the punch press base 1; the precise positioning device 10 includes a positioning device base 100, on which an upper limit sensing switch 101 and a lower limit sensing switch 102 are respectively provided, and both the upper limit sensing switch 101 and the lower limit sensing switch 102 can slide up and down relative to the positioning device base 100, thereby adjusting the height position on the positioning device base 100. The upper limit sensing switch 101 is located above the lower limit sensing switch 102. The upper locking hand wheel 103 can be used to fix the position of the upper limit sensing switch 101 on the positioning device base 100, that is, after the upper locking hand wheel 103 is locked, the upper limit sensing switch 101 will no longer shift; similarly, the lower locking hand wheel 104 can be used to fix the position of the lower limit sensing switch 102 on the positioning device base 100. The upper limit sensing switch 101 and the lower limit sensing switch 102 are both connected to the controller 6 signal.

[0043] During the actual stamping operation, the punch 7 moves within the distance between the upper limit sensing switch 101 and the lower limit sensing switch 102. When the punch 7 moves downward and triggers the lower limit sensing switch 102, the lower limit sensing switch 102 sends a lower limit signal to the controller 6; the controller 6 commands the hydraulic cylinder 8 to stop the piston rod stretching action, and the punch 7 no longer moves downward; at this time, the expansion of the workpiece on the mold 3 is completed; and the controller 6 records the number of punch press stamping times (that is, the number of times the lower limit sensing switch 102 sends the lower limit signal is accumulated); then, the hydraulic cylinder 8 drives its piston rod to perform a corresponding retraction action, thereby driving the punch 7 upward, and when the punch 7 moves upward and triggers the upper limit sensing switch 101, the upper limit sensing switch 101 sends an upper limit signal to the controller 6. The controller 6 commands the hydraulic cylinder 8 to stop the piston rod retraction, and the punch 7 no longer moves upward. Since different batches of workpieces require different degrees of stamping and expanding, the stroke of the hydraulic cylinder 8 is adjusted by adjusting the position of the upper limit sensing switch 101 and the lower limit sensing switch 102 relative to the positioning device base 100, thereby achieving precise positioning of the stamping depth of the workpiece.

[0044] Note: The control principle of the controller 6 belongs to conventional technology, so the present invention will not elaborate on it in detail.

[0045] The working process of the present invention is as follows:

[0046] 1. Expand the workpiece (interface flange to be processed):

[0047] 1. The operator sits in front of the fully automatic punching machine with a rotary feed tray, and the angle between the mold 3 in front of the operator and the mold 3 located directly below the punch 7 is 180°.

[0048] As the rotary feeding tray 4 rotates, the operator can easily place the workpiece on the mold 3 in front.

[0049] 2. As the rotary feed tray 4 continues to rotate, the interface flanges to be processed are sequentially conveyed to the position directly below the punch 7.

[0050] Under the action of the hydraulic cylinder 8, the punch 7 is aimed at the workpiece on the die 3 directly below it to punch, thereby completing the expansion.

[0051] 3. As the rotary feeding plate 4 continues to rotate, the expanded workpiece is transferred to the front of the material taking device 5.

[0052] The material taking device 5 performs the following series of actions:

[0053] 3.1. The horizontal cylinder 51 extends the cylinder rod, so that the vertical cylinder 52, the clamp cylinder 53 and the clamp 54 are close to the rotating feeding tray 4; at this time, the clamp 54 is in the open state;

[0054] 3.2. When the horizontal cylinder 51 extends the cylinder rod to the top, the expanded workpiece is located in the clamping jaws of the clamp 54. At the same time, the clamp cylinder 53 is controlled to close, so that the clamp 54 firmly clamps the expanded workpiece.

[0055] 3.3. Control the vertical cylinder 52 to extend the cylinder rod, thereby driving the clamp cylinder 53 and the clamp 54 to move upward, and separate the expanded workpiece from the mold 3.

[0056] 3.4. When the vertical cylinder 52 extends the cylinder rod to the top, the horizontal cylinder 51 retracts the cylinder rod, so that the vertical cylinder 52, the clamp cylinder 53 and the clamp 54 are away from the rotating feeding plate 4 and return to their original positions; that is, the horizontal cylinder 51 completes the reset;

[0057] Then the vertical cylinder 52 is controlled to retract the cylinder rod, so that the clamp cylinder 53 and the clamp 54 are lowered together and return to the original position, that is, the vertical cylinder 52 completes the reset;

[0058] Finally, the clamp cylinder 53 is controlled to open, so that the clamp 54 is opened, and the expanded workpiece in the clamp 54 falls into the receiving trough 55.

[0059] 4. As the rotary feed tray 4 rotates continuously, the workpiece on each mold 3 performs the above steps 2 and 3 in sequence.

[0060] 5. The controller 6 controls the above components according to time:

[0061] The controller 6 stores in advance the time t1 required to rotate one station (i.e., rotate from one mold 3 to the adjacent mold 3) and the time t2 required to pause at one station. This t2 can satisfy the time required for one punch stroke of the punch 7 and the time required for the material taking device 5 to complete the entire material taking action (complete the above 3.1 to 3.4); that is, the time required for the material taking device 5 to return to the original state from the start of work. Therefore, it is set that the rotary feed tray 4 rotates once every t1+t2=T, that is, rotates one station.

[0062] The positions of the 12 workstations are as shown on the clock, with workstation No. 12 being located directly below the punch 7 and workstation No. 6 facing the operator.

[0063] The details are as follows:

[0064] At the beginning, the workpieces (interface flanges to be processed) are placed on the molds 3 at stations 1 to 6 respectively;

[0065] The power of the entire rotary feed tray fully automatic punching machine is turned on, and the controller 6 commands the rotary power motor 2 to work, and the rotary feed tray 4 rotates according to the set beat, and the controller 6 starts timing; when the mold 3 at station 1 rotates to station 12 (time t1), the controller 6 simultaneously issues the following three commands:

[0066] Command 1: Command the rotary power motor 2 to stop working and the rotary feed tray 4 to remain stationary;

[0067] Command 2: Command the hydraulic cylinder 8 to perform a punching action, thereby punching the workpiece and completing the expansion.

[0068] Command 3: Command the material taking device 5 to perform a material taking action:

[0069] The time of a single stroke of the horizontal cylinder 51, the time of a single stroke of the vertical cylinder 52, and the time required for the clamp cylinder 53 to adjust the working state are all set in advance in the controller 6. Therefore, under the control of the controller 6, the above steps 3.1 to 3.4 can be automatically performed.

[0070] Of course, at the beginning, when the workstation is transferred from directly below the punch 7 to directly opposite the material taking device 5 (ie, from workstation No. 12 to workstation No. 9), the work of the material taking device 5 is an idle operation.

[0071] After the time t2 set for the station pause is reached, the hydraulic cylinder 8 has returned to its original position, and the material taking device 5 has also returned to its original position; the controller 6 commands the rotating feed tray 4 to continue rotating, and the controller 6 restarts the timing and repeats the above work.

[0072] After the rotary feed tray fully automatic punch press starts to operate normally, the operator only needs to load the workpiece onto the mold 3 that rotates to the front.

[0073] 2. Spray lubricating oil on the punch head 7:

[0074] The controller 6 is provided with an instruction in advance that the punch 7 needs to spray lubricating oil after working N times. When the controller 6 records that the number of punching times of the punch press reaches the above set number, the controller 6 commands the atomizing oil spraying device 9 to work. The details are as follows:

[0075] The controller 6 sends out the following two instructions simultaneously: commanding the connecting rod of the nozzle cylinder 94 to retract to the bottom, at which time the atomizing nozzle 91 is facing the punch 7 (such as Figure 5 At the same time, the controller 6 starts the pressure pump of the oil supply tank, so that the atomizing nozzle 91 sprays atomized oil, and the atomized oil is sprayed onto the punch 7. When the set oil spraying time is reached, the controller 6 simultaneously issues the following two instructions: commanding the connecting rod of the nozzle cylinder 94 to extend to the maximum position, at which time the atomizing nozzle 91 is away from the punch 7; at the same time, the controller 6 turns off the pressure pump of the oil supply tank; and the controller 6 resets the recorded number of punching times of the punch press, that is, the controller 6 restarts to record the number of punching times of the punch press.

[0076] The punch press does not need to stop working when spraying lubricating oil. When the punch 7 is in the upward process after completing punching, the punch 7 can be sprayed with lubricating oil.

[0077] Finally, it should be noted that the above examples are only some specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A fully automatic punching machine with a rotary feed tray, comprising a punching machine base (1), on which a punching head (7) driven by a hydraulic cylinder (8) is arranged; the characteristics are: A rotating feeding plate (4) is also provided on the punch press base (1) and is driven by the rotating power motor (2) and rotates relative to the punch press base (1); A rotating feeding plate (4) is provided with molds (3) arranged in a circle and at equal intervals, the molds (3) being used to place workpieces to be processed, and a material removal device (5) for removing processed workpieces from the molds (3) is also provided on the punch base (1); An atomizing oil spraying device (9) is also provided on the punch press base (1), the atomizing oil spraying device (9) comprising an atomizing nozzle (91), an L-shaped connecting rod (92) and a nozzle cylinder (94); the corner of the L-shaped connecting rod (92) is rotatably connected to the punch press base (1) via a rotating shaft (93), the connecting rod of the nozzle cylinder (94) is fixedly connected to the short side of the L-shaped connecting rod (92), and the atomizing nozzle (91) is fixedly connected to the long side of the L-shaped connecting rod (92); the atomizing nozzle (91) is directly opposite to the punch (7) in the oil spraying working state; A precise positioning device (10) is also provided on the punch press base (1), the precise positioning device (10) comprising a positioning device base (100) fixed on the punch press base (1); an upper limit sensing switch (101) and a lower limit sensing switch (102) are respectively provided on the positioning device base (100), both of which are connected to the positioning device base (100) in an upward and downward sliding manner, and the upper limit sensing switch (101) and the lower limit sensing switch (102) are used to limit the stroke of the hydraulic cylinder (8); The hydraulic cylinder (8), the rotary power motor (2), and the material taking device (5) are all connected to the controller (6) by signal; The corner of the L-shaped connecting rod (92) is rotatably connected to the punch base (1) via a rotating shaft (93); the connecting rod of the nozzle cylinder (94) is fixedly connected to the short side of the L-shaped connecting rod (92); and the atomizing nozzle (91) is fixedly connected to the long side of the L-shaped connecting rod (92); when the connecting rod of the nozzle cylinder (94) performs a telescopic movement, the L-shaped connecting rod (92) is driven to rotate around the rotating shaft (93), thereby driving the atomizing nozzle (91) to rotate; when the atomizing nozzle (91) is not working, the connecting rod of the nozzle cylinder (94) is extended to the maximum position, at which time the atomizing nozzle (91) is away from the punch (7); when the atomizing nozzle (91) needs to spray oil, the connecting rod of the nozzle cylinder (94) is retracted to the bottom, at which time the atomizing nozzle (91) is facing the punch (7); The punch (7) moves within the distance between the upper limit sensing switch (101) and the lower limit sensing switch (102); when the punch (7) moves downward and triggers the lower limit sensing switch (102), the lower limit sensing switch (102) sends a lower limit signal to the controller (6); the controller (6) commands the hydraulic cylinder (8) to stop the piston rod stretching action, and the punch (7) no longer moves downward; at this time, the expansion of the workpiece on the mold (3) is completed; and the controller (6) records the number of punching times of the punch press, that is, the number of times the lower limit sensing switch (102) sends the lower limit signal is accumulated; then, the hydraulic cylinder (8) drives its piston rod to make a corresponding Retraction action , thereby driving the punch (7) upward. When the punch (7) moves upward and triggers the upper limit position sensing switch (101), the upper limit position sensing switch (101) sends an upper limit signal to the controller (6); the controller (6) commands the hydraulic cylinder (8) to stop the piston rod Retraction, The punch (7) no longer moves upwards. ； Since different batches of workpieces require different degrees of punching and expanding, the stroke of the hydraulic cylinder (8) is adjusted by adjusting the positions of the upper limit sensing switch (101) and the lower limit sensing switch (102) relative to the positioning device base (100); ultimately, accurate positioning of the punching depth of the workpiece is achieved; The controller (6) is provided with an instruction in advance that lubricating oil needs to be sprayed after the punch (7) has worked N times. When the controller (6) records that the number of punching times of the punch press reaches the set number, the controller (6) commands the atomizing oil spraying device (9) to work; the details are as follows: The controller (6) simultaneously issues the following two instructions: instructs the connecting rod of the nozzle cylinder (94) to retract to the bottom, at which time the atomizing nozzle (91) faces the punch (7); at the same time, the controller (6) starts the pressure pump of the oil supply tank, so that the atomizing nozzle (91) sprays atomized oil, and the atomized oil is sprayed onto the punch (7); when the set oil spraying time is reached, the controller (6) simultaneously issues the following two instructions: instructs the connecting rod of the nozzle cylinder (94) to extend to the maximum position, at which time the atomizing nozzle (91) is away from the punch (7); at the same time, the controller (6) turns off the pressure pump of the oil supply tank; and the controller (6) resets the recorded number of punching presses, that is, the controller (6) restarts recording the number of punching presses; The punch press does not need to stop working when spraying lubricating oil. When the punch (7) is in the upward process after completing punching, the punch (7) can be sprayed with lubricating oil. The material taking device (5) comprises a transverse cylinder (51), a vertical cylinder (52) and a clamp cylinder (53); the cylinder body of the transverse cylinder (51) is fixed on the punch press base (1); the cylinder body of the vertical cylinder (52) is connected to the cylinder rod of the transverse cylinder (51); the cylinder body of the clamp cylinder (53) is connected to the cylinder rod of the vertical cylinder (52); and a clamp (54) for grasping a workpiece is connected to the cylinder rod of the clamp cylinder (53); The horizontal cylinder (51), the vertical cylinder (52) and the clamp cylinder (53) are all connected to the controller (6) by signal; The workstation corresponding to the clamp (54) and the workstation corresponding to the punch (7) form an angle of 90°.

2. The fully automatic punching machine with a rotary feeding tray according to claim 1 is characterized in that: The atomizing nozzle (91) is connected to an oil supply tank provided with a pressure pump through an oil pipe; the nozzle cylinder (94) and the pressure pump of the oil supply tank are both connected to the controller (6) by signal.

3. The fully automatic punching machine with a rotary feeding tray according to claim 2 is characterized in that: The upper locking hand wheel (103) is used to fix the upper limit sensing switch (101) on the positioning device base (100), and the lower locking hand wheel (104) is used to fix the lower limit sensing switch (102) on the positioning device base (100); the upper limit sensing switch (101) and the lower limit sensing switch (102) are both connected to the controller (6) signal.

4. The fully automatic punching machine with a rotary feeding tray according to claim 3 is characterized in that: The rotating feed tray (4) is provided with 12 moulds (3) arranged in a circle and at equal intervals; the angle formed by two adjacent moulds (3) and the axis of the rotating feed tray (4) is 30°.

5. The fully automatic punching machine with a rotary feeding tray according to claim 4 is characterized in that: A material receiving trough (55) is provided below the clamp (54).

6. The fully automatic punching machine with a rotary feeding tray according to claim 4 or 5, characterized in that: The positions of the 12 workstations are arranged as shown in the clock, with workstation No. 12 being located directly below the punch (7) and workstation No. 6 facing the operator; At the beginning, the workpieces are placed on the molds (3) at stations 1 to 6 respectively; The power of the entire rotary feed tray fully automatic punching machine is turned on, and the controller (6) commands the rotary power motor (2) to work, the rotary feed tray (4) rotates according to the set beat, and the controller (6) starts timing; when the mold (3) at station No. 1 rotates to station No. 12, the controller (6) simultaneously issues the following three commands: Command 1: command the rotary power motor (2) to stop working and the rotary feed tray (4) to remain stationary; Command 2, commanding the hydraulic cylinder (8) to perform a punching action, thereby punching the workpiece and completing the expansion; Command three: command the material taking device (5) to perform a material taking action.

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