Automatic square tube on-line puncher

Abstract

The utility model relates to square tube punching technology field, concretely is a kind of square tube on-line automatic puncher, including external frame, the inside of external frame is provided with discharge assembly, the above of discharge assembly is provided with feeding assembly, the both sides of discharge assembly are provided with processing assembly close to discharge port position, processing assembly is intercepted to the square tube transported by discharge assembly in processing position, and it is sequentially fixed from top to bottom radial extrusion, two end axial extrusion, finally the side wall of square tube two ends is punched, this multidirectional clamping mode, the stability of square tube when punching is improved, effectively guarantee the hole position accuracy, while continuous automatic operation reduces manual intervention, improves the processing efficiency and improves precision and efficiency, the execution of puncher is completed by multiple cylinders, and the on-off of cylinder is controlled by solenoid valve group, and feeding, conveying, clamping, punching and discharging action are then uniformly coordinated by plc control center, to realize the automatic operation.

Description

Technical Field

[0001] This utility model relates to the field of square tube drilling technology, specifically an automatic drilling machine for square tubes. Background Technology

[0002] On automated production lines for plastic square tubes (such as PVC and ABS), it is usually necessary to drill holes in the end sidewalls. These holes are mainly used for subsequent bolt connections, frame assembly, or internal cable passage. However, due to the inherent low hardness, poor rigidity, and susceptibility to scratches of plastic materials, existing automated drilling machines often face the problem of unstable processing accuracy during application.

[0003] Traditional punching machines typically use pneumatic clamps to directly clamp the outer wall of square tubes. Because plastic surfaces have a low coefficient of friction, relying solely on the friction generated by the pneumatic clamps to resist the punching impact is often insufficient to completely restrict the axial movement of the square tube. At the moment the punch impacts the tube wall, the square tube is prone to axial movement, directly causing axial dimensional errors in the hole position and resulting in defects such as stringing and burrs at the hole opening. Utility Model Content

[0004] The purpose of this invention is to provide an automatic drilling machine for square pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic punching machine for square tubes includes an outer frame, an inner part of which is a discharge component. Above the discharge component is a feeding component. Processing components are located on both sides of the discharge component near the discharge port. The processing components intercept the square tube transported by the discharge component at the processing position and sequentially perform radial compression and fixation from top to bottom, axial compression and fixation at both ends, and finally punch holes in the side walls at both ends of the square tube.

[0007] Preferably, the processing assembly includes mounting brackets fixedly installed on both sides of the discharge port of the outer frame, and position sensors are installed on the side of the two mounting brackets that are close to each other.

[0008] Preferably, the discharge assembly includes two baffles fixedly installed on the outer frame. The baffles are located below both ends of the square tube, and a synchronous belt is provided on the side of the two baffles that are close to each other.

[0009] Preferably, both ends of the synchronous belt are provided with synchronous pulleys, and the two synchronous pulleys on the two synchronous belts are coaxially connected. A second motor is fixedly installed on the outside of one synchronous pulley, and the shaft of the second motor is connected to the synchronous pulley.

[0010] Preferably, a fourth cylinder is fixedly installed at the bottom of the mounting bracket. The fourth cylinder is located on the side near the stop lever, and the piston rod of the fourth cylinder faces upward and is fixedly installed with a stop block.

[0011] A third cylinder is fixedly installed above the mounting bracket, with the piston rod of the third cylinder facing downwards and a rubber column fixedly installed thereon.

[0012] The second cylinder is fixedly installed on one side of the mounting bracket perpendicular to the third cylinder. The piston rod of the second cylinder faces the end of the square tube and is fixedly installed with a fixing block. The bottom of the fixing block has a slot.

[0013] The fifth cylinder is fixedly installed below the mounting bracket, and the piston rod of the fifth cylinder faces upward and is fixedly installed with a punch.

[0014] Preferably, the feeding assembly includes two optical shafts fixedly mounted on the outer frame, the optical shafts being perpendicular to the feeding direction of the square tube, a screw being rotatably mounted between the two optical shafts, a movable seat being threadedly connected to the screw, and a first motor being fixedly mounted at one end of the screw; a first cylinder is fixedly mounted at the bottom of both ends of the movable seat, and a cylinder gripper is provided at the bottom of the first cylinder.

[0015] Compared with the prior art, the advantages of this utility model are as follows:

[0016] 1. Axial interception and positioning are achieved by the stop block; the rubber column then applies radial pressure from above; the fixing block is finally inserted into the end of the square tube and clamps the tube wall, realizing axial clamping and radial limiting, positioning the square tube from multiple directions, and improving the drilling accuracy.

[0017] 2. The moving seat drives the cylinder gripper to move laterally and grasp vertically, directly hoisting the square tube from the external conveyor line to the internal synchronous belt. This vertical feeding method shortens the feeding path, avoids interference with the production line, and improves the overall feeding rhythm and layout flexibility. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0020] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the feeding assembly structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the material discharge component structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the processing component structure of this utility model;

[0024] Figure 6 This is an enlarged schematic diagram of the structure at point A of this utility model.

[0025] The attached figures are labeled as follows:

[0026] 1. Feeding assembly; 11. Optical shaft; 12. Screw; 13. First motor; 14. First cylinder; 15. Cylinder gripper; 16. Moving seat;

[0027] 2. Processing components; 21. Mounting bracket; 22. Second cylinder; 221. Fixing block; 23. Third cylinder; 231. Rubber column; 24. Fourth cylinder; 241. Stop block; 25. Fifth cylinder; 251. Punching tool;

[0028] 3. Discharge assembly; 31. Baffle bar; 32. Synchronous belt; 33. Synchronous pulley; 34. Second motor;

[0029] 4. External frame; 5. Position sensor. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] An automatic hole punching machine for square pipes, such as Figures 1-6 As shown, the device includes an outer frame 4, inside which is a discharge assembly 3. The discharge assembly 3 horizontally transports square tubes to the processing station and removes the finished product after punching. Above the discharge assembly 3 is a feeding assembly 1, which can grab square tubes from the conveyor line outside the punching machine and place them on the discharge assembly 3 below by hoisting. This separates the feeding path from the material conveyor line of the punching machine, saving the waiting time for feeding and thus improving the overall feeding speed. On both sides of the discharge assembly 3 near the discharge port are processing assemblies 2. The processing assemblies 2 intercept the square tubes transported by the discharge assembly 3 at the processing position and sequentially perform radial compression and fixation from top to bottom, axial compression and fixation at both ends, and finally punch holes in the side walls at both ends of the square tube (using a punching process that does not generate dust when punching the square tube).

[0032] First, processing component 2 intercepts the square tube conveyed by discharging component 3, stopping it in the processing position. Then, processing component 2 first presses the square tube from top to bottom, restricting its movement in the vertical plane, and then axially clamps it from both ends to prevent it from moving along its length. After the square tube is completely fixed, processing component 2 simultaneously punches holes in the tube walls on both sides. This step-by-step, multi-directional clamping method improves the stability of the square tube during punching, effectively ensuring the accuracy of the hole position. At the same time, continuous automated operation reduces manual intervention, improves processing efficiency, and enhances both accuracy and efficiency. The punching machine is operated by multiple cylinders, and the on / off of the cylinders is controlled by a solenoid valve group. The feeding, conveying, clamping, punching, and discharging actions are coordinated by the PLC control center, thus realizing the automated operation of the entire punching process.

[0033] The processing component 2 includes mounting brackets 21 fixedly installed on both sides of the discharge port of the external frame 4. Position sensors 5 are installed on the side of the two mounting brackets 21 that are close to each other. When the discharge component 3 transports the square tube to the processing area, the position sensor 5 detects that the square tube is in place and sends a signal to the PLC control center. After receiving this signal, the PLC will control the processing component 2 to block the square tube and position it at the preset processing position.

[0034] The discharge assembly 3 includes two stop bars 31 fixedly installed on the outer frame 4. The stop bars 31 are located below both ends of the square tube, serving as support and guide to ensure the square tube remains stable during conveying. A synchronous belt 32 is provided on the side of the two stop bars 31 that is close to each other. An anti-slip layer is provided on the outer side of the synchronous belt 32, which contacts the wall of the square tube to facilitate subsequent discharge. The bearing surface of the synchronous belt 32 contacts the bottom of the square tube, and its continuous operation realizes the horizontal conveying of the square tube. When the position sensor 5 detects that the square tube has reached the processing position and sends a signal, the PLC control center will control the synchronous belt 32 to stop running, so that the square tube stays in the processing area. After the drilling is completed, the PLC control center restarts the synchronous belt 32 to convey the processed square tube out of the drilling machine.

[0035] Both ends of the synchronous belt 32 are equipped with synchronous pulleys 33, and the two synchronous pulleys 33 on the two synchronous belts 32 are coaxially connected to ensure that the rotation speed of the two synchronous pulleys 33 is consistent, so that the two synchronous belts 32 run synchronously. This ensures that the two ends of the square tube move forward at the same speed during the conveying process, preventing the square tube from deviating or getting stuck during the conveying process. A second motor 34 is fixedly installed on the outside of one synchronous pulley 33. The shaft of the second motor 34 is connected to the synchronous pulley 33 and makes it rotate. The square tube is transported by the meshing of the teeth of the synchronous belt 32 and the tooth grooves of the synchronous pulley 33. When the synchronous pulley 33 rotates, its teeth mesh and pull the belt teeth, forming tension on the tight side of the synchronous belt 32. This tension transmits the torque to the synchronous pulley 33 at the other end through the meshing action, thereby driving the synchronous belt 32 and the two synchronous pulleys 33 to run synchronously. Since the square tube is relatively light and the force points at both ends of its end are on the stop bar 31 during the unloading stage, the synchronous belt 32 can synchronously drive the two ends of the square tube to be discharged.

[0036] A fourth cylinder 24 is fixedly installed at the bottom of the mounting bracket 21. The fourth cylinder 24 is located on the side near the stop bar 31. The piston rod of the fourth cylinder 24 faces upward and a stop block 241 is fixedly installed. When the position sensor 5 detects that the square tube is in place, the synchronous wheel 33 is stopped by the PLC control center. Then the fourth cylinder 24 drives the stop block 241 to rise. The stop block 241 blocks the square tube from the discharge direction, so that it stops at the processing position.

[0037] A third cylinder 23 is fixedly installed above the mounting bracket 21. The piston rod of the third cylinder 23 faces downward and a rubber column 231 is fixedly installed. When the square tube is blocked, the third cylinder 23 drives the rubber column 231 to press down and press the square tube from above. The rubber material contact surface can provide sufficient friction and avoid scratching the surface of the workpiece, thus realizing the radial compression and fixing of the square tube.

[0038] The mounting bracket 21 is fixedly mounted on one side of the third cylinder 23. The piston rod of the second cylinder 22 faces the end of the square tube and is fixedly mounted on a fixing block 221. The bottom of the fixing block 221 has a slot. The second cylinder 22 pushes the fixing block 221 to insert into the square tube from both ends through the piston, and clamps the bottom side wall of the square tube through the slot. Then, it squeezes and fixes the square tube from both ends to prevent it from moving in the length direction. At the same time, the clamping of the slot with the tube wall restricts the movement of the square tube in the radial direction, which enhances the overall stability of the square tube during processing and ensures the stability of the square tube when drilling.

[0039] A fifth cylinder 25 is fixedly installed below the mounting bracket 21. The piston rod of the fifth cylinder 25 faces upward and a punching cutter 251 is fixedly installed. After the square tube is positioned and fixed in sequence by the aforementioned stop block 241, rubber column 231 and fixing block 221, the fifth cylinder 25 drives the punching cutter 251 to move upward and punch holes in the square tube near the bottom sidewalls at both ends.

[0040] The feeding assembly 1 includes two optical shafts 11 fixedly mounted on the outer frame 4. The optical shafts 11 are perpendicular to the feeding direction of the square tube. A screw 12 is rotatably mounted between the two optical shafts 11. A movable seat 16 is threadedly connected to the screw 12. The two optical shafts 11 pass through both ends of the movable seat 16. A first motor 13 is fixedly mounted on one end of the screw 12. When the first motor 13 drives the screw 12 to rotate, the rotational motion is converted into linear motion of the movable seat 16 along the direction of the optical shafts 11 through the threaded transmission.

[0041] A first cylinder 14 is fixedly installed at both ends of the bottom of the movable seat 16. A cylinder gripper 15 is provided at the bottom of the first cylinder 14. When the movable seat 16 moves above the square tube, the piston rod of the first cylinder 14 extends downward, pushing the entire cylinder gripper 15 down, so that the gripper's claw part aligns with and surrounds the square tube. Then, the cylinder gripper 15 closes under the drive of its internal pneumatic mechanism, and its claw retracts and clamps the square tube. After the gripping is completed, the piston rod of the first cylinder 14 retracts, driving the clamped square tube to rise a short distance, so that it is removed from the original conveyor line. After that, the first motor 13 starts, driving the movable seat 16 and the gripped square tube to move laterally through the screw 12 until the square tube is transported to the synchronous belt 32 near the processing station.

[0042] The position sensor 5, the connection and control of the cylinder, solenoid valve and PLC control center, and the cylinder gripper 15 are all widely used technical means in this field. Their specific structure and working principle belong to the prior art in this field and will not be described in detail here.

[0043] The working principle of the automatic hole-drilling machine for square tubes provided by this utility model is as follows:

[0044] After the upstream conveyor line delivers the square tube to the gripping position, the moving seat 16, driven by the first motor 13 and the screw 12, moves to directly above the square tube. Then, the piston rod of the first cylinder 14 extends downward, causing the cylinder gripper 15 at its bottom to descend and clamp the square tube. Next, the first cylinder 14 lifts up, lifting the square tube away from the original conveyor line. Finally, the moving seat 16 moves laterally, transferring the square tube to the synchronous belt 32 located at the processing position. At this time, the bottom of both ends of the square tube falls onto the stop bar 31, and the upper end face of the stop bar 31 is flush with the upper end face of the synchronous belt 32.

[0045] After the square tube is placed on the synchronous belt 32, the second motor 34 drives the synchronous pulley 33 and the synchronous belt 32 to rotate, conveying the square tube to the processing position. When the square tube passes under the mounting frame 21, the position sensors 5 on both sides detect the square tube and send a signal to the PLC control center. The PLC control center controls the second motor 34 to stop, so that the square tube stops at the preset processing position, and controls the fourth cylinder 24 to push the stop block 241 at the upper end of its piston rod to rise, intercepting the square tube from the discharge side.

[0046] Subsequently, the third cylinder 23 drives the piston rod to press down, pressing the square tube from above through the rubber column 231 at the end, thus achieving radial fixation; then, the second cylinder 22 pushes the fixing block 221 at its front end to move into the square tube, so that the front part of the fixing block 221 is inserted into the end of the square tube, and at the same time, the groove at its bottom is engaged with the bottom side wall of the square tube, pressing against and radially limiting the end of the square tube.

[0047] Next, the fifth cylinder 25 drives the punching cutter 251 to move upward and punch holes in the bottom sidewalls of both ends of the square tube; after punching, the above steps are reset in sequence to release the positioning of the square tube.

[0048] Finally, the second motor 34 starts again, driving the synchronous belt 32 to transport the processed square tube out of the punching machine.

[0049] The automatic drilling machine used in this pipeline uses a FISCHER PF-30-24 / 1 motor, an SMC CY1S 32-50-M5 cylinder, and an Omler E2B-M12KS08-WZ-B1 position sensor.

[0050] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An automatic punching machine for square tubes, comprising an outer frame (4), wherein a discharge assembly (3) is disposed inside the outer frame (4), characterized in that, The discharge assembly (3) is provided with a feeding assembly (1) above it. The discharge assembly (3) is provided with processing assemblies (2) on both sides near the discharge port. The processing assemblies (2) intercept the square tube transported by the discharge assembly (3) at the processing position, and sequentially perform radial compression and fixation from top to bottom, axial compression and fixation at both ends, and finally punch holes in the side walls at both ends of the square tube.

2. The automatic drilling machine for square pipes according to claim 1, characterized in that, The processing component (2) includes mounting brackets (21) fixedly installed on both sides of the discharge port of the outer frame (4), and position sensors (5) are installed on the side of the two mounting brackets (21) that are close to each other.

3. The automatic drilling machine for square pipes according to claim 1, characterized in that, The discharge assembly (3) includes two baffles (31) fixedly installed on the outer frame (4). The baffles (31) are located below both ends of the square tube, and a synchronous belt (32) is provided on the side of the two baffles (31) that are close to each other.

4. An automatic drilling machine for square pipes according to claim 3, characterized in that, Both ends of the synchronous belt (32) are connected by synchronous pulleys (33), and the two synchronous pulleys (33) on the two synchronous belts (32) are coaxially connected. A second motor (34) is fixedly installed on the outside of one synchronous pulley (33), and the shaft of the second motor (34) is connected to the synchronous pulley (33).

5. An automatic drilling machine for square pipes according to claim 2, characterized in that, The bottom of the mounting bracket (21) is fixedly mounted with a fourth cylinder (24). The fourth cylinder (24) is located on the side close to the stop bar (31). The piston rod of the fourth cylinder (24) faces upward and is fixedly mounted with a stop block (241). A third cylinder (23) is fixedly installed above the mounting bracket (21). The piston rod of the third cylinder (23) faces downward and is fixedly installed with a rubber column (231). The mounting bracket (21) is fixedly mounted on one side of the third cylinder (23) with the second cylinder (22) facing the end of the square tube and fixedly mounted with the fixing block (221). The bottom of the fixing block (221) is provided with a slot. The fifth cylinder (25) is fixedly installed below the mounting bracket (21). The piston rod of the fifth cylinder (25) faces upward and is fixedly installed with a punch (251).

6. An automatic drilling machine for square pipes according to claim 1, characterized in that, The feeding assembly (1) includes two optical shafts (11) fixedly mounted on the outer frame (4). The optical shafts (11) are perpendicular to the feeding direction of the square tube. A screw (12) is rotatably mounted between the two optical shafts (11). A movable seat (16) is threadedly connected to the screw (12). A first motor (13) is fixedly mounted on one end of the screw (12). A first cylinder (14) is fixedly mounted on the bottom of both ends of the movable seat (16). A cylinder gripper (15) is provided at the bottom of the first cylinder (14).

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