Drilling and tapping composite machine tool for billboard flat tube machining

Abstract

The invention relates to the technical field of machine tools, and discloses a drilling and tapping compound machine tool for billboard flat tube machining, which comprises an equipment box, a workbench is mounted at the upper end of the equipment box, the workbench is of a concentric-square-shaped structure, a rack with a sliding rail is further mounted on the right side of the equipment box, and a supporting plate is slidably mounted on the sliding rail through an electric sliding block; a power execution part is arranged at the left end of the supporting plate, a clamping and positioning part is arranged on the workbench, and a feeding part is arranged on the workbench and the clamping and positioning part jointly. The drilling and tapping compound machine tool for processing the billboard flat tube can effectively solve the problems that in the prior art, when the billboard flat tube is drilled by a drilling machine, the flat tube is difficult to clamp and align on a common drilling machine; and a step-by-step machining operation mode is adopted, in the multiple clamping and carrying processes, positioning errors exist, the coaxiality of hole sites and threads and the consistency of batch machining are affected, and then the assembling quality and structural reliability of the billboard flat pipe and the connecting piece are reduced.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, specifically to a drilling and tapping composite machine tool for processing flat tubes for billboards. Background Technology

[0002] As a key component of the supporting structure for large outdoor advertising carriers, the manufacturing precision and processing efficiency of flat tubes directly affect the overall stability and ease of installation of the billboard. The processing of flat tubes typically involves drilling and tapping at specific locations to facilitate subsequent bolt connections or accessory assembly. Currently, the industry generally employs a step-by-step processing method for such workpieces: drilling is first performed on a drilling machine, and then the workpiece is transferred to a tapping machine or tapped using a manual tap.

[0003] In response to this, this application designs a drilling and tapping composite machine tool for processing billboard flat tubes. When drilling billboard flat tubes, existing drilling machines are difficult to clamp and align because billboard flat tubes are often long and flat. Furthermore, the step-by-step processing method results in positioning errors during multiple clamping and handling processes, affecting the coaxiality of the hole and thread, as well as the consistency of batch processing, thereby reducing the assembly quality and structural reliability of the billboard flat tubes and connectors. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a drilling and tapping composite machine tool for processing flat tubes for billboards. This effectively solves the problems in existing technologies where, when drilling billboard flat tubes, clamping and aligning the tubes on a conventional drilling machine is difficult; and the step-by-step processing method leads to positioning errors during multiple clamping and handling processes, affecting the coaxiality of the holes and threads, as well as the consistency of batch processing, thereby reducing the assembly quality and structural reliability of the billboard flat tubes and connectors.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a drilling and tapping composite machine tool for processing flat tubes for billboards, comprising: The equipment box has a worktable mounted on the top. The worktable has a U-shaped structure. A frame with a slide rail is also mounted on the right side of the equipment box. A support plate is slidably mounted on the slide rail via an electric slider. A power actuator is set on the left end of the support plate. A clamping and positioning part is set on the worktable. A feed part is set on both the worktable and the clamping and positioning part. The power actuator includes a spindle box mounted on the left end of the support plate. Drill chucks are symmetrically mounted on the lower end of the spindle box via the front and rear of the spindle. Drill bits and taps are detachably mounted on the lower ends of the front and rear drill chucks, respectively. Forward and reverse motors for driving the spindle are symmetrically mounted on the upper end of the spindle box via a motor base. The clamping and positioning part includes a partition plate installed on the inner wall of the worktable. The partition plate is a rake-shaped structure with several material discharge cavities at the upper end and a chip discharge cavity at the lower end. An avoidance channel is opened at the upper end of the partition plate corresponding to the spindle box. An extension plate is installed on the upper right side of the worktable. A clamping group is set on the partition plate and a positioning group is set on the extension plate.

[0006] Furthermore, the feed section includes waist-shaped grooves located at both ends of the worktable. Several mounting holes are provided on the worktable and the partition plate. Both ends of the mounting holes are connected to the corresponding waist-shaped grooves. Conveying rollers are rotatably mounted on the inner walls of the mounting holes. The several conveying rollers are connected to each other by a transmission belt. A servo motor for driving the corresponding conveying rollers is mounted on the left side of the front end of the worktable via a motor mount.

[0007] Furthermore, the clamping assembly includes ventilation holes on the partition plate. The ventilation holes consist of several ventilation slots on the left end of the partition plate and several air outlets on the inner walls of the front and rear ends of each discharge chamber. A clamping plate is slidably installed on the inner wall of the air outlet by a tension spring.

[0008] Furthermore, the clamping and positioning part also includes a receiving groove opened on the right side of the clearance channel on the inner wall of the upper end of the worktable. A magnetic positioning strip is slidably installed on the inner wall of the receiving groove by a tension spring, and an electromagnet is installed through the inner wall of the upper end of the receiving groove.

[0009] Furthermore, the positioning assembly includes an installation groove located at the lower end of the extension plate. A magnetic installation strip is slidably installed on the inner wall of the installation groove via a tension spring. A rod is installed at the lower end of the magnetic installation strip corresponding to several material discharge cavities. The rod has a tapered structure, and an electromagnet is installed through the inner wall of the upper end of the installation groove.

[0010] Furthermore, the feeding section also includes several widening holes on the inner wall of the bottom end of each discharge chamber, and the widening holes are respectively connected to the corresponding mounting holes. Several rectangular grooves are provided on the inner wall of the upper end of the worktable, and pressure plates are slidably installed on the inner wall of the rectangular grooves by compression springs. The lower left side of the pressure plate is rounded.

[0011] Furthermore, several ball bearings are embedded on the inner walls at both ends of each discharge chamber, and chip removal holes are opened on the inner wall at the bottom of each discharge chamber corresponding to the avoidance channel. The chip removal holes are also connected to several corresponding widening holes.

[0012] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a drilling and tapping composite machine tool for processing flat tubes for billboards. During the loading and positioning stage, once the electromagnet is connected to the power supply, the magnetic positioning bar extends out of the receiving groove and simultaneously pushes several flat tubes to the right until the right ends of the flat tubes are tightly against the left end face of the magnetic positioning bar. This achieves the effect of precise alignment when several flat tubes are initially placed simultaneously, making loading convenient. It not only ensures the uniformity of the processing benchmark and the consistency of the hole positions during subsequent drilling and tapping, but also avoids the problem of difficult clamping and alignment of flat tubes on ordinary drilling machines.

[0013] During the drilling and tapping stages, the connected conveyor rollers are rotated by a servo motor. At this time, several conveyor rollers will jointly drive several flat tubes to continue moving to the right at a constant speed for a preset distance. Finally, the drilling and tapping stages are repeated. The position of the spindle box, the forward feed and retraction of the drill bit and tap, and the step-by-step conveying of the flat tubes are adjusted by the electric slider. This completes the drilling of all preset positions on several flat tubes. The drilling and tapping stages use the same reference positioning to avoid the conventional step-by-step processing method. During multiple clamping and handling processes, positioning errors may occur, affecting the coaxiality of the hole and thread and the consistency of batch processing. This reduces the assembly quality and structural reliability of the billboard flat tubes and connectors. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the frame, support plate, and power actuator in an embodiment of the present invention; Figure 3 This is a schematic diagram of a partial three-dimensional cross-section of the workbench in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation of the partition plate, conveying roller, and clamping plate in an embodiment of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of section X in the middle; Figure 6 This is a schematic diagram of the three-dimensional separation of the workbench and the partition in an embodiment of the present invention; Figure 7 This is a schematic diagram of a partial three-dimensional cross-section of the partition plate in an embodiment of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of the area at point Y in the middle; Figure 9 This is a schematic diagram of a partial three-dimensional cross-section of the workbench in an embodiment of the present invention; Figure 10 This is a schematic diagram of the three-dimensional separation of the worktable, magnetic positioning strip, and magnetic positioning strip in an embodiment of the present invention; Figure 11 This is a schematic diagram of the three-dimensional separation of the extension plate and the positioning group in an embodiment of the present invention.

[0016] The labels in the diagram represent: 1. Equipment box; 2. Workbench; 3. Frame; 4. Support plate; 5. Power actuator; 51. Spindle box; 52. Drill chuck; 53. Drill bit; 54. Tap; 55. Forward and reverse motor; 6. Clamping and positioning part; 61. Divider plate; 62. Magnetic positioning bar; 621. Electromagnet one; 63. Extension plate; 64. Clamping assembly; 641. Vent hole; 642. Clamping plate; 65. Positioning assembly; 651. Magnetic mounting bar; 652. Insert rod; 653. Electromagnet two; 7. Feed part; 71. Mounting hole; 72. Conveyor roller; 73. Servo motor; 74. Widening hole; 75. Pressure plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] Example: Please see Figures 1-11 This invention provides a technical solution: a drilling and tapping composite machine tool for processing flat tubes for billboards, comprising: Equipment box 1, with a workbench 2 installed on the upper end of the equipment box 1. The workbench 2 has a U-shaped structure. A frame 3 with a slide rail is also installed on the right side of the equipment box 1. A support plate 4 is slidably installed on the slide rail via an electric slider. A power actuator 5 is provided on the left end of the support plate 4. A clamping and positioning part 6 is provided on the workbench 2. A feed part 7 is provided on both the workbench 2 and the clamping and positioning part 6. The power actuator 5 includes a spindle box 51 installed at the left end of the support plate 4. Drill chucks 52 are symmetrically installed at the lower end of the spindle box 51 via the spindle. Drill bits 53 and taps 54 are detachably installed at the lower ends of the two drill chucks 52 respectively. Forward and reverse motors 55 for driving the spindle are symmetrically installed at the upper end of the spindle box 51 via the motor base. The clamping and positioning part 6 includes a partition plate 61 installed on the inner wall of the workbench 2. The partition plate 61 is a rake-shaped structure with several material discharge cavities at the upper end and a chip discharge cavity at the lower end. The upper end of the partition plate 61 is provided with an avoidance channel corresponding to the spindle box 51. An extension plate 63 is installed on the upper right side of the workbench 2. A clamping group 64 is provided on the partition plate 61, and a positioning group 65 is provided on the extension plate 63.

[0020] The feed section 7 includes waist-shaped grooves at both ends of the worktable 2. The worktable 2 and the partition plate 61 are provided with a number of mounting holes 71. The mounting holes 71 are evenly distributed from left to right, and the front and rear ends of the mounting holes 71 are connected to the corresponding waist-shaped grooves. A conveying roller 72 is rotatably mounted on the inner wall of the mounting hole 71. The conveying rollers 72 are connected to each other by a transmission belt. A servo motor 73 for driving the corresponding conveying roller 72 is mounted on the left side of the front end of the worktable 2 through a motor mount.

[0021] The clamping assembly 64 includes a vent 641 on the partition plate 61. The vent 641 consists of several vent grooves on the left end of the partition plate 61 and several air outlets on the inner walls of the front and rear ends of each discharge chamber. The air outlets are evenly distributed from left to right, and a clamping plate 642 is slidably installed on the inner wall of the air outlet by a tension spring.

[0022] The clamping and positioning part 6 also includes a receiving groove opened on the right side of the clearance passage on the upper inner wall of the worktable 2. A magnetic positioning strip 62 is slidably installed on the inner wall of the receiving groove by a tension spring, and an electromagnet 621 is installed through the upper inner wall of the receiving groove.

[0023] The positioning group 65 includes an installation groove located at the lower end of the extension plate 63. A magnetic installation strip 651 is slidably installed on the inner wall of the installation groove by a tension spring. A rod 652 is installed at the lower end of the magnetic installation strip 651 corresponding to several material discharge cavities. The rod 652 has a conical structure, and an electromagnet 653 is installed through the inner wall of the upper end of the installation groove.

[0024] The feeding unit 7 also includes several widening holes 74 that are opened on the inner wall of the bottom end of each of the discharge chambers. The several widening holes 74 are respectively connected to the corresponding mounting holes 71. Several rectangular grooves are opened on the inner wall of the upper end of the worktable 2. The several rectangular grooves are evenly distributed from left to right, and a pressure plate 75 is slidably installed on the inner wall of the rectangular groove by a compression spring. The lower left side of the pressure plate 75 is rounded.

[0025] Several ball bearings are embedded on the inner walls at both ends of each discharge chamber. The ball bearings are evenly distributed from left to right. A chip removal hole is opened on the inner wall at the bottom of each discharge chamber corresponding to the avoidance channel. The chip removal hole is waist-shaped and is connected to several corresponding widening holes 74.

[0026] In practice: First, the two forward and reverse motors 55 in this application can drive the drill bit 53 and tap 54 to rotate forward and reverse respectively by driving the corresponding spindle. The spindle on the spindle box 51 can control the drill bit 53 or tap 54 to freely move up and down for reciprocating motion, so as to realize the drilling, tapping and withdrawal steps of the flat tube. The electric sliding hole on the slide rail can be used to drive the spindle box 51 to move back and forth through the support plate 4, so as to realize the sequential drilling and tapping of several flat tubes. The servo motor 73 can drive one of the conveyor rollers 72 to rotate. Since several conveyor rollers 72 are connected by a transmission belt, and the design of the widened hole 74 allows the outer wall of the conveyor roller 72 to fully roll and contact the lower end of the flat tube, several conveyor rollers 72 can be driven by the transmission belt to realize the synchronous rotation of several conveyor rollers 72, thereby achieving the effect of simultaneously driving several flat tubes to move at a uniform speed from left to right.

[0027] In the initial state, the support plate 4 and the spindle box 51 are located at the frontmost side above the worktable 2. The drill bit 53 and the tap 54 are both in the raised and withdrawn state. The vent 641 is in the closed state. Under the action of the tension spring, several clamping plates 642 retract into their corresponding vent chambers. Under the action of the compression spring, several pressure plates 75 extend out of their corresponding rectangular slots. Under the action of the tension spring, the magnetic positioning strip 62 retracts into the receiving slot. Similarly, the magnetic mounting strip 651 also retracts into the mounting slot. At this time, electromagnet one 621 and electromagnet two 653 are both in the de-energized state.

[0028] During the material feeding and positioning stage, since the partition plate 61 has a rake-shaped structure and several ball bearings are embedded in the inner walls of each feeding chamber, the operator or external feeding device first places several flat tubes to be processed into several feeding chambers on the partition plate 61. The ball bearings can effectively reduce the frictional resistance when placing the flat tubes and avoid scratching the surface of the flat tubes. During this period, the flat tubes will successively contact several pressure plates 75. Since the lower left side of the pressure plate 75 has a rounded corner structure, it can avoid scratching the surface of the flat tubes and ensure that the flat tubes squeeze against the pressure plate 75 and retract into the corresponding rectangular groove for avoidance. This allows multiple flat tubes to be placed in parallel at the same time, improving batch processing efficiency. It should be noted that the height of the flat tubes can be slightly higher than the height of the partition plate 61, so that the lower end of the pressure plate 75 can be slightly attached to the upper end of the flat tube, which can form longitudinal pre-pressure. In conjunction with several conveying rollers 72, the flat tubes are driven to the right at a uniform speed, while preventing the flat tubes from jumping upwards when drilling and tapping.

[0029] Next, the electromagnet 621 is connected to the power supply. The electromagnet 621 will generate magnetic force to repel the magnetic positioning strip 62. Under the action of magnetic repulsion, the magnetic positioning strip 62 will extend out of the receiving groove and simultaneously push several flat tubes to the right, pushing several flat tubes into the worktable 2 in a synchronized manner until the right ends of several flat tubes are tightly against the left end face of the magnetic positioning strip 62, completing the end positioning of several flat tubes. This achieves the effect of accurate alignment when several flat tubes are initially placed at the same time, making loading convenient. It can not only ensure the uniformity of the processing benchmark and the consistency of the hole position during subsequent drilling and tapping, but also avoid the problem of difficult clamping and alignment of flat tubes on ordinary drilling machines.

[0030] During the clamping and fixing stage, compressed air is first input into the vent 641 on the partition plate 61 through an external air pump. The compressed air will enter several air outlet chambers sequentially through several vent slots on the left end, forming a uniform air pressure. At this time, the air pressure in the air outlet chamber will push the corresponding clamping plate 642 to move towards the adjacent flat tube until the clamping plate 642 is tightly attached to the front and rear surfaces of the flat tube, thereby achieving the effect of clamping the side walls of the adjacent flat tube. Since the air outlet chambers are evenly distributed along the length of the discharge chamber, multiple points of uniform clamping can be achieved within the entire length of the flat tube, avoiding the problem of excessive local clamping force causing deformation of the flat tube.

[0031] During the drilling and tapping process, after several flat tubes are securely clamped, the power to the electromagnet 621 is first disconnected. The magnetic positioning bar 62 will retract into the receiving groove and return to its original position under the action of the tension spring. According to the preset drilling position on the flat tube, the electric slider on the slide rail is then controlled to drive the support plate 4 to move backward at a uniform speed along the slide rail. The support plate 4 will drive the drill bit 53 and the tap 54 to move backward synchronously through the spindle box 51 until the drill bit 53 is aligned with the first drilling position of the flat tube in the foremost material discharge chamber. At this time, there is no flat tube below the tap 54, and the clearance channel below can provide sufficient space for the subsequent descent of the tap 54.

[0032] Next, the forward and reverse motor 55 at the upper end of the spindle box 51, corresponding to the drill bit 53, controls the corresponding spindle to drive the drill bit 53 to rotate forward, and at the same time controls the corresponding spindle to feed downward. At this time, the drill bit 53 will move downward at a constant speed and drill the corresponding flat tube below until the drilling of the flat tube is completed. During this period, the chip removal holes opened on the partition plate 61 can provide sufficient space for the drill bit 53 to feed downward. With the cooperation of several chip removal holes and chip removal chambers, the waste chips generated during the drilling process will fall from the chip removal holes to the inner wall of the bottom of the worktable 2. They can be used in conjunction with the external air blowing slag removal device for cleaning, effectively avoiding the problem of waste chips not being effectively discharged and remaining on the partition plate 61 and the worktable 2.

[0033] After drilling the flat tube is completed, the corresponding spindle is controlled to reverse the rotation of the drill bit 53 via the forward and reverse motor 55 at the upper end of the spindle box 51. At the same time, the corresponding spindle is controlled to move upward to return to its original position. At this time, the drill bit 53 will move upward at a constant speed and move away from the corresponding flat tube below. Then, the forward and reverse motor 55 of the corresponding drill bit 53 is controlled to stop working. Then, this step is repeated: by adjusting the position of the spindle box 51 by the electric slider, the drill bit 53 and the tap 54 rotate forward and feed and retract in a cycle. This can complete the drilling of the same preset position on several flat tubes. During this process, when the tap 54 moves to the top of the corresponding flat tube, the corresponding spindle is controlled to rotate forward by the front and rear forward and reverse motors 55 respectively. The front and rear spindles will drive the drill bit 53 and the tap 54 to rotate forward synchronously. This allows the drill bit 53 and the tap 54 to rotate forward, feed and retract synchronously. By drilling and tapping multiple flat tubes at the same preset position in sequence, there is no need to repeat the tedious clamping work and the overall processing time is greatly reduced.

[0034] After drilling is completed at the same preset position on several flat tubes, the external air pump must be stopped from inputting compressed air into the air vents 641 on the partition plate 61. The air pressure in several air outlet chambers will disappear. Under the action of the tension spring, several clamping plates 642 will retract into their respective air outlet chambers, releasing the clamping effect on the side wall of the flat tube. At this time, several pressure plates 75 still maintain the synchronous pre-pressing effect on several flat tubes, ensuring that the lower end of several flat tubes is in full contact with the outer wall of the conveying roller 72 so as to move smoothly to the right.

[0035] Then, the servo motor 73 controls the connected conveyor roller 72 to rotate. This conveyor roller 72 will drive the other several conveyor rollers 72 to rotate synchronously via the transmission belt. At this time, the several conveyor rollers 72 will jointly drive the several flat tubes to continue to move to the right at a uniform speed for a preset distance. Finally, the drilling and tapping steps are repeated. The position of the spindle box 51, the forward feed and retraction of the drill bit 53 and tap 54, and the stepping conveying of the flat tubes are adjusted again by the electric slider. The drilling and tapping are completed at all preset positions on the several flat tubes. The drilling and tapping are based on the same reference positioning to avoid the conventional step-by-step processing method. During multiple clamping and handling processes, there will be positioning errors, which will affect the coaxiality of the hole and thread and the consistency of batch processing, thereby reducing the assembly quality and structural reliability of the billboard flat tubes and connectors.

[0036] During the auxiliary positioning stage, after the flat tube has undergone drilling and tapping, and the rightmost hole has moved below the extension plate 63, the electromagnet 653 is connected to the power supply simultaneously with the flat tube stepping feed stopping. The electromagnet 653 will generate magnetic force to repel the magnetic mounting strip 651. Under the action of magnetic repulsion, the magnetic mounting strip 651 will extend out of the mounting groove. The magnetic mounting strip 651 will drive several insertion rods 652 to move downward synchronously until the insertion rods 652 are inserted into the pre-machined holes at the upper end of the flat tube for positioning. The method of inserting the insertion rods 652 into the pre-drilled holes for auxiliary positioning ensures the consistency of drilling and tapping. At the same time, the pre-pressing effect of several pressure plates 75 can further prevent the flat tube from shifting laterally during subsequent feeding. It should be noted that the insertion rods 652 are made of wear-resistant rubber and have a tapered structure, so they will not damage the threads in the pre-drilled holes of the flat tube during insertion.

[0037] It should also be noted that after the first batch of flat tubes is conveyed to the right to the middle of the workbench 2, the second batch of flat tubes is placed on the partition plate 61 for loading. Simply ensure the right end of the second batch of flat tubes is tightly fitted to the left end of the first batch, and pre-press it with several pressure plates 75 to prevent the second batch of flat tubes from shifting position. No further placement or positioning is required, making the operation convenient and improving the continuity of the overall drilling and tapping process. After the first batch of flat tubes is processed and conveyed to the right side of the workbench 2, it can be received by the operator or an external receiving device. Furthermore, this application also supports changing the processing hole position of the flat tubes along the front-back direction. This only requires changing the position of several insertion rods 652 at the lower end of the magnetic mounting strip 651 to correspond to the processing hole position of the flat tube. This is prior art and will not be described in detail here.

[0038] In summary, this application has the following advantages: Advantage 1: During the material loading and positioning stage, operators or external loading devices first place several flat tubes to be processed into several feeding cavities on the partition plate 61. Several ball bearings can effectively reduce the frictional resistance when placing the flat tubes and avoid scratching the surface of the flat tubes. During this process, the flat tubes will successively contact several pressure plates 75. While avoiding scratching the surface of the flat tubes, the pressure plates 75 can also ensure that the flat tubes are squeezed against the pressure plates 75 and retracted into the corresponding rectangular grooves for avoidance. This allows multiple flat tubes to be placed in parallel at the same time, improving batch processing efficiency. The pressure plates 75 can form longitudinal pre-pressure, which, together with several conveying rollers 72, drives the flat tubes to be conveyed to the right at a uniform speed, while preventing the flat tubes from jumping upwards during drilling and tapping.

[0039] Secondly, the electromagnet 621 is then connected to the power supply, and the magnetic positioning bar 62 extends out of the receiving groove. Then, it simultaneously pushes several flat tubes to the right until the right ends of several flat tubes are in close contact with the left end face of the magnetic positioning bar 62. This achieves the effect of precise alignment when several flat tubes are initially placed, making feeding convenient. It not only ensures that the processing benchmark is consistent and the hole positions are consistent during subsequent drilling and tapping, but also avoids the problem of difficult clamping and alignment of flat tubes on ordinary drilling machines.

[0040] Thirdly, during the clamping and fixing stage, compressed air is first introduced into the air vent 641 on the partition plate 61 through an external air pump until the clamping plate 642 is tightly attached to the front and rear surfaces of the flat tube, thereby achieving the effect of clamping the side walls of adjacent flat tubes. Since the air outlet is evenly distributed along the length of the discharge chamber, it can achieve multi-point uniform clamping of the flat tube within the entire length range, avoiding the problem of excessive local clamping force causing deformation of the flat tube.

[0041] Fourthly, during the drilling and tapping stages, the forward and reverse motor 55 at the upper end of the spindle box 51, corresponding to the drill bit 53, controls the corresponding spindle to drive the drill bit 53 to rotate forward. At the same time, the corresponding spindle is controlled to feed downward. At this time, the drill bit 53 will move downward at a constant speed and drill the corresponding flat tube below until the drilling of the flat tube is completed. During this period, the chip removal holes opened on the partition plate 61 can provide sufficient space for the drill bit 53 to feed downward. The waste chips generated during the drilling process will fall from the chip removal holes to the inner wall of the bottom of the worktable 2, effectively avoiding the problem of waste chips not being effectively discharged and remaining on the partition plate 61 and the worktable 2.

[0042] Fifthly, after drilling the flat tube is completed, the drill bit 53 is first controlled to move upward at a constant speed and away from the corresponding flat tube below. Then, this step is repeated: by adjusting the position of the spindle box 51 through the electric slider, the drill bit 53 and the tap 54 rotate forward and retract in a cyclical motion, drilling can be completed on the same preset position on several flat tubes. During this process, when the tap 54 moves above the corresponding flat tube, the drill bit 53 and the tap 54 are controlled to rotate forward synchronously through the two forward and reverse motors 55 respectively. This allows the drill bit 53 and the tap 54 to rotate forward, feed, and retract synchronously. By adopting the method of drilling and tapping multiple flat tubes at the same preset position in sequence, there is no need to repeat the tedious clamping work, and the overall processing time is greatly reduced.

[0043] Advantage six: Then, the servo motor 73 controls the connected conveyor roller 72 to rotate. At this time, several conveyor rollers 72 will jointly drive several flat tubes to continue to move to the right at a uniform speed for a preset distance. Finally, the drilling and tapping processing steps are repeated. The position of the spindle box 51, the forward feed and retraction of the drill bit 53 and tap 54, and the stepping conveying of the flat tubes are adjusted again by the electric slider. The drilling and tapping processing uses the same reference positioning to avoid the conventional step-by-step processing operation method. During multiple clamping and handling processes, there will be positioning errors, which will affect the coaxiality of the hole and thread and the consistency of batch processing, thereby reducing the assembly quality and structural reliability of the billboard flat tubes and connectors.

[0044] Advantage 7: During the auxiliary positioning stage, when the rightmost hole of the flat tube moves below the extension plate 63, at the same time as the flat tube stepping conveyor stops, the electromagnet 653 is connected to the power supply, and the magnetic mounting strip 651 will extend out of the mounting groove until several insertion rods 652 are inserted into the pre-machined holes at the upper end of the flat tube for positioning. The method of inserting the insertion rods 652 into the pre-drilled holes for auxiliary positioning ensures the consistency of drilling and tapping. At the same time, the pre-pressing effect of several pressure plates 75 can further prevent the flat tube from shifting laterally during subsequent feeding.

[0045] Advantage 8: After the first batch of flat tubes is conveyed to the right to the middle of the workbench 2, the second batch of flat tubes is placed on the partition plate 61 for feeding. The pre-pressing by the alignment of several pressure plates 75 can prevent the position of the second batch of flat tubes from shifting, eliminating the need for repositioning. This makes the operation convenient and facilitates the continuity of the overall drilling and tapping process. In addition, this application also supports changing the processing hole position of the flat tube in the front-back direction. It is only necessary to change the position of several inserts 652 at the lower end of the magnetic mounting strip 651 to correspond to the processing hole position of the flat tube.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling and tapping combined machine tool for processing a billboard flat pipe, characterized in that, Include: Trunk (1), the upper end of the equipment box (1) is provided with a workbench (2), the workbench (2) is a back-shaped structure, the right side of the equipment box (1) is further provided with a rack (3) with a slide rail, a supporting plate (4) is slidably installed on the slide rail through an electric sliding block, a power execution part (5) is arranged at the left end of the supporting plate (4), a clamping positioning part (6) is arranged on the workbench (2), and a feeding part (7) is arranged on the workbench (2) and the clamping positioning part (6); Wherein, the power execution part (5) includes a main shaft box (51) installed at the left end of the supporting plate (4), the main shaft box (51) is symmetrically provided with a drill chuck (52) at the lower end through a main shaft, and the lower end of the front and rear drill chucks (52) is respectively detachably provided with a drill bit (53) and a tap (54), and the upper end of the main shaft box (51) is symmetrically provided with a forward and reverse motor (55) for driving the main shaft through a motor base; Wherein, the clamping positioning part (6) includes a partition plate (61) installed on the inner wall of the workbench (2), the partition plate (61) is a rake-shaped structure with a plurality of discharging cavities at the upper end and a chip removal cavity at the lower end, and the upper end of the partition plate (61) is provided with an avoidance passage corresponding to the main shaft box (51), an extension plate (63) is installed on the upper side of the right end of the workbench (2), a clamping group (64) is arranged on the partition plate (61), and a positioning group (65) is arranged on the extension plate (63).

2. The drilling and tapping compound machine tool for processing the flat pipe of the advertising board according to claim 1, characterized in that: The feeding part (7) includes a waist-shaped groove arranged at the front and rear ends of the workbench (2), a plurality of installation round holes (71) are arranged on the workbench (2) and the partition plate (61), the front and rear ends of the plurality of installation round holes (71) are communicated with the corresponding waist-shaped grooves, and a conveying roller (72) is rotatably installed on the inner wall of the installation round hole (71); a plurality of conveying rollers (72) are connected through a transmission belt, and a servo motor (73) for driving the corresponding conveying roller (72) to rotate is installed on the left side of the front end of the workbench (2) through a motor base.

3. The drilling and tapping compound machine tool for processing the flat pipe of the advertising board according to claim 1, characterized in that: The clamping group (64) includes an air vent hole (641) arranged on the partition plate (61), the air vent hole (641) is composed of a plurality of air vent grooves arranged at the left end of the partition plate (61) and a plurality of air outlet cavities arranged on the inner walls of the front and rear ends of each discharging cavity, and a clamping plate (642) is slidably installed on the inner wall of the air outlet cavity through a tension spring.

4. The drilling and tapping combined machine tool for processing the flat pipe of the advertising board according to claim 1, characterized in that: The clamping positioning part (6) further includes a containing groove arranged on the inner wall of the upper end of the workbench (2) and on the right side of the avoidance passage, a magnetic positioning strip (62) is slidably installed on the inner wall of the containing groove through a tension spring, and an electromagnet one (621) is installed on the upper end of the inner wall of the containing groove.

5. The drilling and tapping compound machine tool for processing the flat pipe of the advertising board according to claim 1, characterized in that: The positioning group (65) includes an installation groove arranged at the lower end of the extension plate (63), a magnetic installation strip (651) is slidably installed on the inner wall of the installation groove through a tension spring, an insertion rod (652) is arranged on the lower end of the magnetic installation strip (651) corresponding to the plurality of discharging cavities, the insertion rod (652) is a tapered structure, and an electromagnet two (653) is installed on the upper end of the inner wall of the installation groove.

6. The drilling and tapping combined machine tool for processing the flat pipe of the advertising board according to claim 2, characterized in that: The feeding part (7) further comprises a plurality of widening holes (74) formed on the inner wall of the bottom end of each feeding cavity, the plurality of widening holes (74) are respectively communicated with the corresponding mounting round holes (71), a plurality of rectangular grooves are formed on the inner wall of the upper end of the workbench (2), a pressing plate (75) is slidably installed on the inner wall of the rectangular groove through a compression spring, and the lower end of the pressing plate (75) is rounded on the left side.

7. The drilling and tapping compound machine tool for processing the flat pipe of the advertising board according to claim 1, characterized in that: A plurality of ball bearings are embedded on the inner walls of the front and rear ends of each feeding cavity, and a chip falling hole is formed on the inner wall of the bottom end of each feeding cavity corresponding to the avoiding channel, and the chip falling hole is simultaneously communicated with the corresponding plurality of widening holes (74).

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