Automatic feeding device of punching machine

Abstract

The utility model discloses a punching machine automatic feeding device which comprises a feeding mechanism installed on the side face of a punching machine and a positioning mechanism installed on the front face of the punching machine, the feeding mechanism comprises a feeding sliding way and a material pushing air cylinder located in the feeding sliding way, and a push plate is vertically arranged on a piston rod of the material pushing air cylinder. Therefore, the workpieces are pushed and fed towards the stamping machining position along the material pushing slide way. The positioning mechanism is composed of a chain, a guide rod, a guide base, a spring, a positioning block and the like, and secondary positioning is conducted on the workpiece pushed to the stamping machining position. In the feeding pushing direction, a discharging sliding way is arranged on the other side of the stamping machining position, and the machined workpieces are pushed out along the discharging sliding way by means of the pushing force transmitted between the workpieces. According to the automatic feeding device, workpieces are automatically fed into the machining area of the punching equipment to be machined and automatically discharged, industrial accidents caused by the fact that hands of workers stretch into a punching machine are avoided, the production industrial injury rate is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a feeding device, in particular to an automatic feeding device for a punching machine. Background Art

[0002] Stamping is a highly efficient, high-precision, and widely applicable metalworking process. Existing highly automated machine tools automatically identify workpieces and, through their integrated automatic control systems, promptly stop the press, protecting the operator. However, for some specific parts, traditional punch presses still require manual feeding, which can be dangerous if not handled with care. While safety gratings can be added on both sides of the slider's motion area to ensure the operator leaves the press area before pressing, this can reduce production efficiency.

[0003] The utility model with authorization announcement number CN 221184470 U discloses an automatic feeding device for stamping, comprising: a feeding mechanism for automatically feeding a workpiece to be processed; a stamping platform for placing the workpiece for stamping; a workbench for mounting the feeding mechanism and the stamping platform; and a positioning mechanism comprising a block, a bracket, a telescopic rod, and a positioning plate. The three blocks are arranged on the front, rear, and right sides of the stamping platform, and the telescopic rod is fixed to the top of the block via a bracket. The output end of the telescopic rod faces the center of the stamping platform and is fixedly connected to the positioning plate. The positioning mechanism is arranged on the stamping platform. After the feeding mechanism delivers the workpiece to the stamping platform, the output ends of the three telescopic rods extend, driving the positioning plate toward the center of the stamping platform, adjusting the position of the workpiece to prevent it from shifting on the stamping platform. However, this device can only perform automatic feeding and cannot achieve automatic discharging, which limits its scope of application and reduces production efficiency. Utility Model Content

[0004] The utility model provides an automatic feeding device for a punching machine, which enables feeding, punching processing and discharging to be completed automatically, thus avoiding harm to personnel, and greatly improving feeding efficiency and production efficiency.

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

[0006] An automatic feeding device for a stamping machine includes a feeding mechanism installed on the side of the stamping machine and a positioning mechanism installed on the front of the stamping machine. The feeding mechanism includes a feeding slide extending in the left and right directions and a pushing cylinder located in the feeding slide. A pushing plate is vertically provided on the piston rod of the pushing cylinder, thereby pushing the workpiece along the pushing slide to the stamping processing position for feeding. The positioning mechanism includes an upper plate seat, a positioning block, a spring, a guide rod, a guide seat, a supporting roller, a chain, a positioning base plate, a positioning block guide seat and a supporting roller fixing seat. The guide seat, the supporting roller fixing seat and the positioning block guide seat are all fixed on the positioning base plate. The supporting roller is fixed to the supporting roller fixing seat through a shaft. The upper plate seat is vertically fixed to the slider of the stamping machine. The chain is hinged to the connecting column, and the lower end of the chain passes through the supporting wheel and the guide rod and extends out of the guide seat and is hinged. The positioning block is limited in the positioning block guide seat and moves back and forth with the drive of the chain to perform secondary positioning of the workpiece advanced to the stamping processing position (improve the stamping processing accuracy). Along the feeding direction, a discharging slide is provided on the other side of the stamping processing position. One end of the discharging slide is connected to the feeding slide through a connecting groove to form a stamping processing position in the connecting groove. A blanking plate is provided at the other end of the discharging slide.

[0007] Furthermore, the feed chute and discharge pipe are each composed of a chute base plate with a groove (to ensure the installation accuracy of the chute) and two oppositely arranged L-shaped angle steels. A chute is formed between the two oppositely arranged L-shaped angle steels. The two L-shaped angle steels are respectively pressed against the edges of the chute base plate groove by a number of clamping blocks. The chute base plate of the feed chute is fixed to the feed chute base, and the chute base plate, positioning base plate and connecting groove of the discharge chute are all fixed to the lower template of the punching machine. Furthermore, a rear top plate is provided at the right end of the feed chute, and an adjustment screw is passed through the rear top plate. The left end of the adjustment screw is connected to the push cylinder, which is used to adjust the position of the push cylinder along the feed chute, so that the push cylinder pushes the workpiece to stop accurately at the predetermined position for the punching process.

[0008] Furthermore, the upper end surfaces of the pressing blocks on both sides of the push cylinder are provided with pressure plates, and fastening bolts are provided on the pressure plates. The lower ends of the fastening bolts are pressed against the push cylinder to press and fix the push cylinder.

[0009] Furthermore, a brush is provided above the feeding slide on the left side of the pushing cylinder. The brush and the bottom surface of the feeding slide are arranged opposite to each other. The brush is fixed on the clamping blocks on both sides of the feeding slide. The friction generated between the brush and the workpiece is used to prevent the workpiece from moving in the slide. The moving distance is uncontrollable due to inertia, ensuring that the workpiece moves the same distance each time.

[0010] Furthermore, a magnetic switch for detecting whether the cylinder is extended into position and a magnetic switch for detecting whether the cylinder is retracted into position are installed on the pushing cylinder.

[0011] Furthermore, a gasket and a nut are provided on one end of the guide rod extending out of the guide seat and on the other end connected to the positioning block.

[0012] Furthermore, a notch is provided at one end of the positioning block facing the stamping processing position to better guide the workpiece.

[0013] Furthermore, the blanking plate is provided with a blanking chute corresponding to the chute of the discharge chute.

[0014] Furthermore, a notch is provided on a side of the connecting groove away from the positioning mechanism to facilitate observation of the stamping processing position.

[0015] The method of feeding using the above-mentioned automatic feeding device of the punching machine is as follows:

[0016] (1) The magnetic switch on the push cylinder and the cam controller of the punch slide are connected to the PLC control system so that the logical relationship between the action of the push cylinder and the punching action of the punch on the punch slide is controlled by the PLC control system. After the workpiece is manually placed in the feeding slide, the PLC control system simultaneously receives the signal that the push cylinder has retracted into position and the punch slide is at the top dead center. By stepping on the foot switch, the push cylinder extends and pushes the workpiece through the push plate, so that the workpiece in the feeding slide moves to the stamping processing position. When the push cylinder is extended into position, the workpiece moves to the predetermined position. When the PLC control system receives the signal from the magnetic switch that the push cylinder is extended into position, it controls the push cylinder to retract and return to position, and at the same time gives the punch press a downward command. At the same time, the punch slide is pressed down, the tension on the chain disappears, and the spring pushes the positioning block to extend toward the stamping processing position, pushing the workpiece and performing secondary correction on the workpiece.

[0017] (2) After the punching action is completed, the punching machine slider moves up, and the upper plate seat drives the chain to pull the positioning block. When the punching machine slider is at the top dead center, the chain is tightened and drives the positioning block to withdraw away from the punching processing position. At the same time, a new workpiece is placed in the feeding slide. When the PLC control system receives the signal that the push cylinder has retracted into place and the punching machine slider is at the top dead center at the same time, the foot switch is stepped on, and the push cylinder pushes the new workpiece to the predetermined position, thereby displacing the previous workpiece by a distance of the length of the workpiece. The workpiece that has completed the stamping is pushed out along the discharge slide by relying on the thrust transmitted between the workpieces, and is sent out through the blanking plate and the conveyor belt arranged below the blanking plate.

[0018] During operation, the PLC controls the logical relationship between the push plate's movement and the punching action of the punch during the feeding mechanism's operation. A magnetic switch is installed on the push cylinder to detect when the cylinder is fully extended and retracted. When the PLC simultaneously receives signals indicating the cylinder is fully retracted and the punch slide is at top dead center, pressing the foot switch causes the push plate to extend and push the workpiece. Once the PLC receives the fully extended signal, it controls the cylinder's retraction and simultaneously issues a downward pressure command to the punch, completing the stamping action.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] A connecting groove connects the feed chute and the discharge chute and serves to guide the workpiece. During the stamping process, the upper die pushes the separated core into the lower die, where it exits through the discharge hole at the bottom of the press base. After stamping, the workpiece is released from the die using elastic stripper plates mounted on the upper and lower dies to prevent it from becoming stuck on the die core. This facilitates the workpiece's movement along the discharge chute, where the thrust of the push cylinder, transmitted between the workpieces, pushes the completed workpiece out of the discharge chute.

[0021] The utility model can automatically deliver the workpiece into the processing area of the punching equipment for processing and automatically discharge the workpiece, thereby avoiding work-related injuries caused by workers putting their hands into the punching machine, reducing the production injury rate and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 It is a structural diagram of the feeding mechanism;

[0024] Figure 3 It is a structural diagram of the positioning mechanism;

[0025] Figure 4 It is a diagram of the connection position of the connecting trough and the feeding chute, the discharging chute and the positioning mechanism;

[0026] In the figure: 1. Adjusting screw; 2. Rear ejector plate; 3. Pushing cylinder; 4. Pressing plate; 5. Pushing plate; 6. Feeding slide; 7. Clamping block; 8. Brush; 9. Feeding slide bottom plate; 10. Feeding slide base; 11. Punching machine; 111. Slider; 112. Lower template; 12. Upper plate seat; 121. Connecting column; 13. Stamping processing position; 14. Discharging slide; 15. Positioning block; 16. Spring; 17. Guide rod; 18. Guide seat; 19. Support roller; 20. Chain; 21 Positioning bottom plate; 22. Connecting groove; 23. Positioning block guide seat; 24. Support roller fixing seat; 25. Discharging slide bottom plate; 26. L-shaped angle steel, 27. Blanking plate. DETAILED DESCRIPTION

[0027] The technical solution of the present utility model will be fully described below with reference to the accompanying drawings.

[0028] An automatic feeding device for a punching machine, such as Figures 1 to 4 As shown, it includes a feeding mechanism installed on the side of the punching machine 11 and a positioning mechanism installed on the front of the punching machine, the feeding mechanism includes a feeding slide 6 extending in the left and right directions and a pushing cylinder 3 located in the feeding slide 6, a pushing plate 5 is vertically provided on the piston rod of the pushing cylinder 3, so as to push the workpiece along the pushing slide 6 to the stamping processing position 13 for feeding, the positioning mechanism includes an upper plate seat 12, a positioning block 15, a spring 16, a guide rod 17, a guide seat 18, a supporting roller 19, a chain 20, a positioning base plate 21, a positioning block guide seat 23 and a supporting roller fixing seat 24, the guide seat 18, the supporting roller fixing seat 24 and the positioning block guide seat 23 are all fixed on the positioning base plate 21, the supporting roller 19 is fixed on the supporting roller fixing seat 24 through an axis, the upper plate seat 12 is vertically fixed on the slider 111 of the punching machine 11, and extends The output end is provided with a connecting column 121 extending downward, one end of the guide rod 17 passes through the guide seat 18, the other end of the guide rod 17 is sleeved with a spring 16 and the end is fixedly connected to the positioning block 15, the upper end of the chain 20 is hinged to the connecting column 121, and the lower end of the chain 20 bypasses the support wheel 19 and the guide rod 17 and extends out of one end of the guide seat 18 and is hinged, the positioning block 15 is limited in the positioning block guide seat 23 and moves back and forth with the drive of the chain 20, thereby performing secondary positioning on the workpiece pushed to the stamping processing position 13, along the feeding direction, a discharge chute 14 is provided on the other side of the stamping processing position 13, one end of the discharge chute 14 is docked with the feeding chute 6 through the connecting groove 22, and the stamping processing position 13 is formed in the connecting groove 22, and the other end of the discharge chute 14 is hinged with a blanking plate 27 through a hinge.

[0029] The feed chute 6 is composed of a feed chute base plate 9 with a trough and two oppositely positioned L-shaped angle steels 26. The discharge pipe is composed of a discharge chute base plate 25 with a trough and two oppositely positioned L-shaped angle steels 26. The two oppositely positioned L-shaped angle steels 26 form a feed chute and a discharge chute, and the push cylinder 3 is located within the feed chute. The L-shaped angle steels 26 are respectively pressed against the edges of the feed chute base plate 9 or the discharge chute base plate 25 on both sides of the trough by a plurality of pressing blocks 7. The feed chute base plate 9 is fixed to the feed chute base 10. The discharge chute base plate 25, the positioning base plate 21, and the connecting groove 22 are all fixed to the lower template 112 of the punching machine. The right end of the feeding chute 6 is provided with a rear top plate 2, and an adjustment top screw 1 is passed through the rear top plate 2. The left end of the adjustment top screw 1 is connected to the pushing cylinder 3, which is used to adjust the position of the pushing cylinder 3 along the direction of the feeding chute 6, so that the pushing cylinder 3 pushes the workpiece to stop accurately at the predetermined position of the stamping process.

[0030] The upper end surfaces of the pressing blocks 7 on both sides of the push cylinder 3 are provided with pressing plates 4, and fastening bolts are provided on the pressing plates 4. The lower ends of the fastening bolts are against the push cylinder 3 to press and fix the push cylinder 3.

[0031] A brush 8 is provided above the feeding slide 6 on the left side of the pushing cylinder 3 . The brush 8 and the bottom surface of the feeding slide are arranged opposite to each other. The brush 8 is fixed on the pressing blocks on both sides of the feeding slide 6 .

[0032] The end of the guide rod 17 extending from the guide seat 18 and the end connected to the positioning block 15 are both provided with a washer and a nut.

[0033] The push cylinder 3 is provided with a magnetic switch for detecting whether the cylinder is extended into position and a magnetic switch for detecting whether the cylinder is retracted into position.

[0034] The end of the positioning block 15 facing the stamping processing position 13 is provided with notches of different shapes according to the characteristics of the workpiece to better guide the workpiece, such as semicircular, elliptical, W-shaped, and V-shaped. In this application, the end of the positioning block 15 facing the stamping processing position 13 is provided with a V-shaped notch.

[0035] A notch is provided on one side of the connecting groove 22 away from the positioning mechanism to form an observation window for easily observing the condition of the stamping processing position 13 .

[0036] The blanking plate 27 is provided with a blanking chute corresponding to the chute of the discharge chute 14 .

[0037] The method of feeding using the above-mentioned automatic feeding device of the punching machine is as follows:

[0038] (1) The magnetic switch on the push cylinder 3 and the cam controller of the punch slide 111 are connected to the PLC control system so that the logical relationship between the action of the push cylinder 3 and the punching action of the punch on the punch slide 111 is controlled by the PLC control system. After the workpiece is manually placed in the feeding slide 6, the PLC control system simultaneously receives the signal that the push cylinder 3 has retracted into position and the punch slide 111 is at the top dead center. The foot switch is stepped on and the push cylinder 3 extends, pushing the workpiece through the push plate 5, so that the workpiece in the feeding slide 6 moves to the stamping processing position 13. When the push cylinder 3 is extended into position, the workpiece moves to the predetermined position. When the PLC control system receives the signal from the magnetic switch that the push cylinder 3 is extended into position, it controls the push cylinder 3 to retract and return to position, and at the same time gives the punch 11 a downward pressure instruction. At the same time, the punch slide 111 is pressed down, the tension on the chain 20 disappears, and the spring 16 pushes the positioning block 15 to extend toward the stamping processing position 13, pushing the workpiece and performing secondary correction on the workpiece.

[0039] (2) After the punching action is completed, the punching machine slider 111 moves upward, and the upper plate seat 12 drives the chain 20 to pull the positioning block 15. When the punching machine slider 111 is at the top dead center, the chain 20 is tightened and drives the positioning block 15 to withdraw away from the punching processing position 13. At the same time, a new workpiece is placed in the feeding slide 6. When the PLC control system receives the signal that the push cylinder 3 has retracted into place and the punching machine slider 111 is at the top dead center at the same time, the foot switch is stepped on, and the push cylinder 3 pushes the new workpiece to the predetermined position, thereby displacing the previous workpiece by a distance of the length of the workpiece. The workpiece that has completed the stamping is pushed out along the discharge slide 14 by relying on the thrust transmitted between the workpieces, and is sent out through the blanking plate 27 and the conveyor belt arranged below the blanking plate 27.

[0040] It should be noted that the embodiments described above are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. An automatic feeding device for a punching machine, characterized in that: It includes a feeding mechanism installed on the side of the punching machine and a positioning mechanism installed on the front of the punching machine. The feeding mechanism includes a feeding slide extending in the left and right directions and a pushing cylinder located in the feeding slide. A pushing plate is vertically provided on the piston rod of the pushing cylinder, so as to push the workpiece along the pushing slide to the stamping processing position for feeding. The positioning mechanism includes an upper plate seat, a positioning block, a spring, a guide rod, a guide seat, a supporting roller, a chain, a positioning base plate, a positioning block guide seat and a supporting roller fixing seat. The guide seat, the supporting roller fixing seat and the positioning block guide seat are all fixed on the positioning base plate. The supporting roller is fixed to the supporting roller fixing seat through a shaft. The upper plate seat is vertically fixed to the slider of the punching machine. The protruding end is provided with a connecting column extending downward, one end of the guide rod passes through the guide seat, the other end of the guide rod is provided with a spring and the end is fixedly connected to the positioning block, the upper end of the chain is hinged to the connecting column, and the lower end of the chain passes around the supporting wheel and the guide rod and extends out of one end of the guide seat and is hinged. The positioning block is limited in the positioning block guide seat and moves back and forth with the drive of the chain, thereby performing secondary positioning on the workpiece pushed to the stamping processing position. Along the feeding direction, a discharging slide is provided on the other side of the stamping processing position, and one end of the discharging slide is connected to the feeding slide through a connecting groove to form a stamping processing position in the connecting groove. A blanking plate is provided at the other end of the discharging slide.

2. The automatic feeding device for a punching machine according to claim 1, characterized in that: The feeding chute and the discharging pipe are composed of a chute bottom plate with a sink groove and two oppositely arranged L-shaped angle steels. A chute is formed between the two oppositely arranged L-shaped angle steels. The two L-shaped angle steels are pressed on the edges on both sides of the sink groove of the chute bottom plate through a number of pressing blocks. The chute bottom plate of the feeding chute is fixed on the feeding chute base, and the chute bottom plate, positioning bottom plate and connecting groove of the discharging chute are all fixed on the lower template of the punching machine.

3. The automatic feeding device for a punching machine according to claim 1, characterized in that: A rear top plate is provided at the right end of the slide bottom plate of the feeding slide, and an adjustment screw is passed through the rear top plate. The left end of the adjustment screw is connected to the top of the pushing cylinder, which is used to adjust the position of the pushing cylinder along the direction of the feeding slide, so that the pushing cylinder pushes the workpiece to stop accurately at the predetermined position of the stamping process.

4. The automatic feeding device for a punching machine according to claim 2, characterized in that: The upper end surfaces of the pressing blocks on both sides of the push cylinder are provided with pressing plates, and fastening bolts are provided on the pressing plates. The lower ends of the fastening bolts are against the push cylinder to press and fix the push cylinder.

5. The automatic feeding device for a punching machine according to claim 2, characterized in that: A brush is provided above the feeding slide on the left side of the pushing cylinder. The brush and the bottom surface of the feeding slide are arranged opposite to each other, and the brush is fixed on the pressing blocks on both sides of the feeding slide.

6. The automatic feeding device for a punching machine according to claim 1, characterized in that: The push cylinder is equipped with a magnetic switch for detecting whether the cylinder is extended into position and a magnetic switch for detecting whether the cylinder is retracted into position.

7. The automatic feeding device for a punching machine according to claim 1, characterized in that: One end of the guide rod extending out of the guide seat and one end connected to the positioning block are both provided with a gasket and a nut.

8. The automatic feeding device for a punching machine according to claim 1, characterized in that: A notch is provided on one end of the positioning block facing the stamping processing position to better guide the workpiece.

9. The automatic feeding device for a punching machine according to claim 1, characterized in that: The blanking plate is provided with a blanking chute corresponding to the chute of the discharge chute.

10. The automatic feeding device for a punching machine according to claim 1, characterized in that: A notch is provided on one side of the connecting groove away from the positioning mechanism to facilitate observation of the stamping processing position.

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