An automated pneumatic drilling machine

Abstract

This application provides an automated pneumatic drilling machine, comprising: a frame, horizontally placed on the ground with a base platform at the top; a sliding assembly, including a slide rail horizontally mounted on the base platform and a stamping table slidably mounted on the slide rail; a workpiece, horizontally placed on the stamping table; a pneumatic stamping assembly, suspended above the base, with a stamping plate at one end; and drill bits evenly arranged on the stamping plate. By densely arranging drill bits on the stamping plate and using the pneumatic stamping assembly to drive all drill bits to synchronously press down and drill holes, a single stamping operation can complete the hole positions that would require dozens or even hundreds of steps in traditional equipment. Compared to manual operation, it completely eliminates repetitive positioning time, significantly increasing productivity. The stamping table on the slide rail is driven by a servo motor, and the movement path is programmed and controlled by a PLC control terminal, resulting in high workpiece positioning accuracy and avoiding positional deviations during manual drilling operations.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, specifically to an automated equipment for batch drilling on sheet metal, profiles or other planar workpieces, and in particular an automated pneumatic drilling machine that uses pneumatic drive for punch drilling and has high-precision positioning and efficient multi-hole processing capabilities. Background Technology

[0002] In various industrial sectors such as metal processing, woodworking, plastic product manufacturing, and prefabrication of building components, drilling densely, uniformly, or in a specific arrangement of holes in flat workpieces is a common and important process. Such machining tasks typically require high efficiency, high precision (consistency of hole positions), and good machining quality (smooth hole walls, no burrs).

[0003] Traditional drilling methods mainly include:

[0004] 1. Manual bench drill: The operator manually positions the workpiece and drills holes one by one using a bench drill. This method is highly flexible, but has significant drawbacks: high labor intensity, extremely low production efficiency, especially for workpieces that need to drill hundreds of holes, drilling position accuracy is highly dependent on the operator's experience and has poor consistency, there are safety hazards, and it is difficult to achieve mass automated production.

[0005] 2. CNC Drilling Machine (Single Spindle): This method uses a CNC system to control the movement of the worktable or spindle, achieving automated positioning and drilling. While this method offers high precision and increased automation, its processing efficiency remains insufficient when dealing with a large number of densely packed holes due to the single-spindle structure. Frequent starts, stops, and spindle movements also increase processing time and energy consumption.

[0006] Therefore, there is an urgent need to develop a new type of automated drilling equipment that can overcome the above-mentioned defects of existing technologies, effectively alleviate the rigid impact of the equipment during drilling, and enable a large number of drill bits to accurately and synchronously punch and drill, and to achieve high-precision workpiece positioning and movement, so as to significantly improve the efficiency, accuracy and reliability of batch drilling operations. Utility Model Content

[0007] This application provides an automated pneumatic drilling machine to solve the problems of low efficiency, low accuracy, and poor reliability in large-scale drilling in the prior art.

[0008] This application adopts the following technical solution: an automated pneumatic drilling machine, comprising:

[0009] The rack is placed horizontally on the ground and has a base platform at the top.

[0010] The sliding assembly includes a slide rail disposed horizontally on a base platform and a stamping table slidably disposed on the slide rail;

[0011] The workpiece is placed horizontally on the stamping table;

[0012] A pneumatic stamping assembly is suspended above the base platform, and a stamping plate is provided at one end of the pneumatic stamping assembly; and drilling bits are evenly arranged on the stamping plate.

[0013] In this process, the sliding component moves the workpiece horizontally to below the pneumatic stamping component, and then the stamping component starts and moves the drilling bit downward to drill holes in the workpiece.

[0014] Preferably, the sliding assembly also includes a servo motor and a PLC control terminal, wherein the PLC control terminal controls the servo motor to drive the stamping table to move horizontally along the slide rail.

[0015] Preferably, the pneumatic stamping assembly includes a cylinder, and the flow rate of gas introduced into the cylinder is controlled by a regulator to achieve the speed of cylinder extension and retraction response.

[0016] Preferably, the regulator is a throttle valve.

[0017] Preferably, a suspension is provided on the base platform, and the pneumatic stamping assembly is mounted on the suspension.

[0018] Preferably, the suspension is fastened to the base platform by screws.

[0019] Preferably, the frame, suspension and stamping plate are made of aluminum alloy.

[0020] Preferably, at least 160 drill bits are provided.

[0021] The automated pneumatic drilling machine provided in this application significantly solves the technical problems of low efficiency, poor accuracy, and insufficient reliability in existing large-scale drilling operations through the integrated innovation of pneumatic punching synchronous drilling and high-precision positioning technology. Specifically, its core advantages are as follows:

[0022] Significantly improves drilling efficiency and productivity: By densely arranging at least 160 drilling bits on the stamping plate and using a pneumatic stamping assembly to drive all the drill bits to press down synchronously, a single stamping operation can complete the hole positions that would require dozens or even hundreds of steps in traditional equipment. Compared to single-spindle CNC drilling machines, processing efficiency is increased by more than 100 times; compared to manual operation, it completely eliminates repetitive positioning time, significantly increasing productivity, and is especially suitable for workpieces such as heat sinks that require high-density hole groups.

[0023] Achieving high-precision hole position consistency: A servo motor drives the stamping table on the slide rail, and the movement path is controlled by a PLC programmable controller, ensuring high workpiece positioning accuracy and avoiding positional deviations caused by manual operation. Drill bits are evenly arranged on the stamping plate according to a preset matrix, ensuring consistent hole spacing and meeting the requirements of precision assembly. The pneumatic system provides stable pressure, and combined with the rigid structure of the stamping plate, ensures uniform force on all drill bits, avoiding differences in hole depth.

[0024] Effectively mitigates impact vibration and extends equipment life: The cylinder precisely controls the gas flow through a throttle valve (regulator), allowing for flexible adjustment of the pressing speed. It descends rapidly before the drill bit contacts the workpiece, then slows down to buffer the impact, significantly reducing instantaneous impact load. This prevents drill bit chipping and workpiece displacement, reduces equipment vibration, improves drilling quality (hole wall smoothness), and extends the service life of the drill bit and cylinder.

[0025] Furthermore, the PLC control unit integrates and manages the servo motor positioning and cylinder action timing, achieving full automation of the "movement-positioning-pressing-reset" process and eliminating human error. The pneumatic system has a simple structure and low failure rate, making it easier to maintain compared to complex mechanical transmission multi-head drilling machines. The aluminum alloy frame, suspension, and stamping plate ensure rigidity while reducing inertial load, further improving motion response stability.

[0026] Modular design (slide rails, detachable suspension) facilitates quick changes in drill bit layout to adapt to different workpieces. Lightweight aluminum alloy structure reduces energy consumption and infrastructure costs. Operators only need to clamp the workpiece and call the PLC program to complete the processing, significantly reducing skill requirements and labor intensity, and enabling "one person, multiple machines" management. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0028] Figure 1 This is a schematic diagram of the appearance of this application:

[0029] Figure 2 This is the front view of this application;

[0030] Figure 3 This application Figure 2 A magnified view of a portion of the sliding component.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Frame; 11. Base platform; 12. Suspension;

[0033] 20. Sliding assembly; 21. Slide rail; 22. Pressing table; 23. Servo motor; 24. PLC control terminal;

[0034] 30. Machined parts;

[0035] 40. Pneumatic stamping assembly; 41. Cylinder; 42. Regulator (throttle valve);

[0036] 50. Stamped plate;

[0037] 60. Drill bit. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by a person skilled in the art to which this application pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0043] Example 1: Infrastructure Implementation

[0044] Traditional multi-head drilling machines use mechanical linkage to drive the drill bit, which has problems such as poor synchronization, bulky structure, and inability to quickly change drill jigs, resulting in insufficient processing flexibility.

[0045] like Figures 1-3 As shown, the core of the drilling machine in this application includes:

[0046] Frame 10: A horizontally placed aluminum alloy frame with a base platform 11 welded to the top;

[0047] Suspension 12: The base platform 11 is detachably connected by screws (not shown in the figure). In this technical solution, a hollow aluminum alloy design is preferred, which reduces the weight by 30%.

[0048] Pneumatic stamping assembly 40: installed in the middle of suspension 12, the stamping plate 50 at its bottom is preferably a 10mm thick aluminum alloy plate, and 160 standard Φ5mm drill bits 60 are evenly arranged (hole spacing accuracy ±0.05mm).

[0049] Sliding component 20: A linear slide rail 21 is installed on the base platform 11, and the stamping table 22 is slidably connected to it through a slider. The workpiece 30 is placed on the stamping table 22. In this embodiment, the workpiece 30 is a water distribution tank used in the heat exchange process of the cooling tower.

[0050] The working process of this equipment:

[0051] Manually place the workpiece 30 → push the stamping table 22 directly below the stamping plate 50 → start the pneumatic stamping assembly 40 → 160 drill bits press down synchronously to drill holes → reset and remove the workpiece.

[0052] In this technical solution, compared with the traditional manual drilling method:

[0053] Improved synchronization: Traditional mechanical linkage multi-head drills (such as gear transmission) have a synchronization error of >0.5mm, while the pneumatic drive of this solution makes the synchronization error of the 160 drill bit negligible;

[0054] Lightweight design: The aluminum alloy structure reduces weight by 60% compared to the traditional steel frame, reducing equipment transportation and foundation costs;

[0055] Modular design: Changing the stamping plate 50 with different drill bit layouts takes only 20 minutes and does not require a complicated debugging process.

[0056] Example 2: Implementation of High-Precision Positioning

[0057] The positioning error of manually pushing the stamping table is ±2mm, which causes the overall hole group to shift and the scrap rate to be high.

[0058] like Figures 2-3 As shown, the sliding component 20 is further equipped with:

[0059] Servo motor 23: It is connected to a ball screw, and the screw nut is fixed to the bottom of the stamping table 22 (the transmission of the servo motor is achieved by the traditional ball screw transmission method, which is not shown in the figure).

[0060] PLC control terminal 24: presets the processing program and instructs the servo motor 23 to drive the stamping table 22 to move along the slide rail 21 with a repeatability positioning accuracy of ±0.02mm.

[0061] Workflow:

[0062] Input machining coordinates into PLC → Start program → Servo motor 23 precisely moves stamping table 22 to target station → Pneumatic stamping component 40 automatically triggers drilling.

[0063] The advantages of using PLC control are as follows:

[0064] Accuracy comparison: Manual positioning has a high scrap rate, while PLC positioning reduces the scrap rate;

[0065] Efficiency Improvement: When processing multi-hole workpieces, traditional equipment requires multiple clamping operations. This solution uses a PLC program to continuously move the stamping table 22, shortening the processing time for a single piece.

[0066] Cylinder 41 is a double-acting cylinder (model CDU50×100) with an output pressure of 0.6MPa;

[0067] Throttle valve 42: Installed at the air inlet of cylinder 41, it regulates the gas flow and controls the downward speed of the piston.

[0068] Control logic:

[0069] Rapid section: When the drill bit is 10mm away from the workpiece, the throttle valve is open at 80% and the piston speed is 300mm / s;

[0070] Buffer section: At the moment the drill bit contacts the workpiece, the throttle valve opening is adjusted to 30%, the piston speed drops to 50mm / s, and constant pressure is maintained during the drilling process.

[0071] The advantages of using a combined drive system of cylinder 41 and throttle valve 42 are as follows:

[0072] Impact force comparison: The impact acceleration without the throttle valve is much greater than that after the throttle valve is installed, which reduces the mechanical vibration of the equipment during drilling.

[0073] Drill bit life: The chipping rate is reduced, and the average drill bit life is increased from 500 cycles to 3000 cycles;

[0074] Hole quality: By using pneumatic methods, the burr rate is reduced from 25% to 3%, and the hole wall roughness Ra≤6.3μm (meeting the precision assembly standard).

[0075] As another optional implementation of this application, the number of drill bits is expanded: specifically, the stamping plate 50 can be replaced with a 256-hole module (suitable for radiator processing).

[0076] Material substitution: Under high rigidity conditions, the stamping plate 50 is made of 7075 aviation aluminum alloy (tensile strength 570MPa).

[0077] Drive variant: Servo motor 23 can be replaced with a stepper motor (low-cost solution), while maintaining positioning accuracy of ±0.1mm.

[0078] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automated air pressure drill, characterized by, include: The rack is placed horizontally on the ground and has a base platform at the top. The sliding assembly includes a slide rail disposed horizontally on a base platform and a stamping table slidably disposed on the slide rail; The workpiece is placed horizontally on the stamping table; A pneumatic stamping assembly is suspended above the base platform, and a stamping plate is provided at one end of the pneumatic stamping assembly; and drilling bits are evenly arranged on the stamping plate. Wherein, after the sliding component moves the workpiece horizontally to below the pneumatic stamping component, the stamping component starts and moves the drilling bit down to drill a hole in the workpiece.

2. The automated pneumatic drilling machine according to claim 1, characterized in that, The sliding assembly also includes a servo motor and a PLC control terminal, wherein the PLC control terminal controls the servo motor to drive the stamping table to move horizontally along the slide rail.

3. The automated pneumatic drilling machine according to claim 2, characterized in that, The pneumatic stamping assembly includes a cylinder, and the flow rate of gas introduced into the cylinder is controlled by a regulator to adjust the speed of the cylinder's extension and retraction response.

4. The automated pneumatic drilling machine according to claim 3, characterized in that, The regulator is a throttle valve.

5. The automated pneumatic drilling machine according to claim 4, characterized in that, The base platform is equipped with a suspension, and the pneumatic stamping assembly is mounted on the suspension.

6. The automated pneumatic drilling machine according to claim 5, characterized in that, The suspension is fastened to the base platform by screws.

7. The automated pneumatic drilling machine according to claim 6, characterized in that, The frame, suspension, and stamping plate are made of aluminum alloy.

8. The automated pneumatic drilling machine according to claim 1, characterized in that, The drilling bit set has at least 160 bits.

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