A CNC gantry milling machine with anti-offset structure

Abstract

This utility model discloses a CNC gantry milling machine with an anti-deviation structure, comprising: a first linear module and a second linear module on the milling machine. A connecting plate is fixedly installed at one end of the moving block of the first linear module, and a second linear module is fixedly installed inside the connecting plate. An L-shaped plate is fixedly installed at one end of the moving block of the second linear module. A trajectory monitoring mechanism is fixedly installed at one end of both the connecting plate and the L-shaped plate. This application, through the design of the trajectory monitoring mechanism, enables it to monitor and correct lateral deviation of the connecting plate using a first reflector and a first laser ranging sensor; and to control longitudinal deviation of the L-shaped plate using a second reflector and a second laser ranging sensor. Simultaneously, the sliding guide of the L-shaped plate by the U-shaped frame further suppresses deviation, forming a two-way anti-deviation system in both the lateral and longitudinal directions. This ensures that there is no risk of deviation during the multi-dimensional movement of the machine tool, adapting to the multi-directional machining needs of complex parts.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, specifically a CNC gantry milling machine with an anti-deviation structure. Background Technology

[0002] A gantry milling machine, also known as a gantry milling machine, is a milling machine with a gantry frame and a horizontal long bed. Multiple milling cutters can be used simultaneously to machine surfaces on a gantry milling machine, resulting in high machining accuracy and production efficiency. It is suitable for machining large workpieces' planes and inclined surfaces in batch and mass production. CNC gantry milling machines can also machine spatial curved surfaces and some special-shaped parts.

[0003] For example, the national authorized patent announcement number CN218081515U discloses a CNC gantry milling machine fixture with an anti-offset structure. It includes a CNC gantry milling machine body and a clamping mechanism. A machining table is provided below the CNC gantry milling machine body, and a T-slot is arranged on the machining table. The clamping mechanism includes a movable positioning slider, a long pressure plate, and a slider bolt. The movable positioning slider is slidably connected to the T-slot. One end of the long pressure plate is rotatably connected to the top of the movable positioning slider. A through hole is provided on the long pressure plate, vertically penetrating along the axis. The slider bolt is slidably connected to the T-slot, with the top of the bolt vertically upward through the through hole. The bolt is also equipped with a fastening nut that is threadedly connected to the slider bolt. This utility model can clamp and fix multiple workpieces simultaneously, preventing workpiece offset and ensuring workpiece machining accuracy. It reduces the number of steps required to install / disassemble the clamping mechanism, reducing the workload and intensity of operators, saving time and effort.

[0004] However, the aforementioned CNC gantry milling machine fixture with anti-offset structure only solves the problem of relative offset between the workpiece and the worktable, but completely ignores the risk of positional offset of the core moving parts of the machine tool itself. In long-term machining, wear of the lead screw, insufficient lubrication of the guide rail, thermal deformation of the parts caused by machining heat, or micro-displacement of the structure caused by foundation settlement and cutting vibration can all cause the worktable and slide to deviate from the preset trajectory. Even if the workpiece is firmly fixed by the fixture, the offset moving parts will still cause the workpiece or tool to "misalign and cut", resulting in the part dimensions being out of tolerance. Especially for large parts, even a small offset can lead to the scrapping of the part. Utility Model Content

[0005] The purpose of this utility model is to provide a CNC gantry milling machine with an anti-deviation structure to solve the problems mentioned in the background art, such as the core moving parts of the machine tool easily deviating from the preset trajectory due to factors such as lead screw wear, thermal deformation, and vibration, and the lack of a real-time monitoring mechanism, which leads to a high scrap rate of parts and severe wear of equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A CNC gantry milling machine with an anti-offset structure includes: a first linear module and a second linear module on the milling machine. A connecting plate is fixedly installed at one end of the moving block of the first linear module. The second linear module is fixedly installed inside the connecting plate. An L-shaped plate is fixedly installed at one end of the moving block of the second linear module. A trajectory monitoring mechanism is fixedly installed at one end of both the connecting plate and the L-shaped plate.

[0008] Preferably, two sets of guide rails are fixedly installed at one end of both the milling machine and the connecting plate, and each pair of guide rails allows the connecting plate and the L-shaped plate to slide laterally and longitudinally on their outer surfaces.

[0009] Preferably, the trajectory monitoring mechanism includes a first reflector plate, which is embedded and fixedly installed at one end of the milling machine. The first reflector plate is horizontally opposite to the first laser ranging sensor, which is embedded and fixedly installed at one end of the connecting plate.

[0010] Preferably, a U-shaped frame is fixedly installed between the two sides of the connecting plate. The U-shaped frame slides on the outer surface of the L-shaped plate and a second laser ranging sensor is embeddedly fixedly installed at one end of its inner side. The second laser ranging sensor is horizontally opposite to the second reflector, and the second reflector is embeddedly fixedly installed at one end of the L-shaped plate.

[0011] Preferably, both the first and second reflectors are V-shaped, and the internal V-shaped reflective surface is stepped, so that when the connecting plate or L-shaped plate is tilted, the first or second laser range sensor will be driven to irradiate the stepped reflective surface of the first or second reflector.

[0012] Preferably, the signal transmitting ends of the first and second laser ranging sensors are connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electronic control end of the first and second linear modules.

[0013] Preferably, the first and second laser ranging sensors and controllers are model LXTLV200X485Q and S7-1200, respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Through an integrated design of "mechanical guidance + laser monitoring + intelligent correction", a full-process anti-deviation system for the moving parts of CNC gantry milling machines has been constructed:

[0016] On the one hand, by using two sets of guide rails on the milling machine, physical guidance is provided for the lateral sliding of the connecting plate and the longitudinal sliding of the L-shaped plate, thus suppressing the tendency of deviation from the basic motion level;

[0017] On the other hand, relying on the combination of the V-shaped stepped reflector and the laser rangefinder in the trajectory monitoring mechanism, it can accurately capture minute deviations that are difficult to detect with traditional guidance (such as the lateral deviation of the connecting plate and the longitudinal deviation of the L-shaped plate). By using the distance change caused by the laser beam irradiating the stepped surface, the deviation can be quickly identified. Combined with the real-time data processing and command issuance of the controller, the operating parameters of the first and second linear modules can be dynamically adjusted to correct the deviation in time, forming a closed-loop control of "guidance-monitoring-correction". This not only solves the core problem of the machine tool's moving parts' own deviation, but also avoids the limitations of relying solely on physical guidance. It can ensure that the connecting plate and the L-shaped plate always move along the preset trajectory, ultimately ensuring the workpiece processing accuracy, reducing equipment wear, and improving production efficiency. It is especially suitable for processing large precision parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall side cross-section of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the U-shaped frame of this utility model.

[0021] In the figure: 1. Milling machine; 101. First linear module; 102. Second linear module; 103. Connecting plate; 104. L-shaped plate; 105. Guide rail rod; 2. Track monitoring mechanism; 201. First reflector; 202. First laser rangefinder; 203. Second laser rangefinder; 204. Second reflector; 205. U-shaped frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1As shown, a CNC gantry milling machine with an anti-offset structure includes: a first linear module 101 and a second linear module 102 on a milling machine 1. A connecting plate 103 is fixedly installed at one end of the moving block of the first linear module 101. The second linear module 102 is fixedly installed inside the connecting plate 103. An L-shaped plate 104 is fixedly installed at one end of the moving block of the second linear module 102. A trajectory monitoring mechanism 2 is fixedly installed at one end of both the connecting plate 103 and the L-shaped plate 104. Two sets of guide rails 105 are fixedly installed at one end of both the milling machine 1 and the connecting plate 103, and each pair of guide rails 105 provides transverse and longitudinal guidance for the connecting plate 103 and the L-shaped plate 104 on their outer surfaces.

[0024] Through the design of the milling machine 1, the first linear module 101, the second linear module 102, the connecting plate 103, the L-shaped plate 104, and the trajectory monitoring mechanism 2, during operation, the milling machine 1 is started first. When it is necessary to drive the connecting plate 103 to drive the subsequent components to achieve lateral movement, the first linear module 101 starts to work. Its moving block moves along a preset lateral trajectory under the drive of the module. Since the connecting plate 103 is fixedly installed at one end of the moving block of the first linear module 101, the connecting plate 103 will slide laterally synchronously with the moving block. At the same time, one end of the milling machine 1 is fixedly installed... The two sets of guide rails 105 guide the lateral sliding of the connecting plate 103, preventing the connecting plate 103 from deviating from the preset trajectory during lateral movement. When it is necessary to drive the L-shaped plate 104 to achieve longitudinal movement, the second linear module 102, which is fixedly installed in the connecting plate 103, is activated, and its moving block moves along the preset longitudinal trajectory. Since the L-shaped plate 104 is fixed to one end of the moving block of the second linear module 102, it will slide longitudinally synchronously with the moving block. At this time, the two sets of guide rails 105 fixedly installed at one end of the connecting plate 103 guide the L-shaped plate 104. The longitudinal sliding of the connecting plate 103 serves as a guide, preventing the L-shaped plate 104 from shifting during longitudinal movement. Throughout the entire process of the lateral sliding of the connecting plate 103 and the longitudinal sliding of the L-shaped plate 104, the trajectory monitoring mechanism 2, fixed to one end of the connecting plate 103 and the L-shaped plate 104 respectively, remains operational, monitoring the lateral movement trajectory of the connecting plate 103 and the longitudinal movement trajectory of the L-shaped plate 104 in real time. Once the connecting plate 103 or the L-shaped plate 104 is detected to deviate from the preset trajectory, the trajectory monitoring mechanism 2 will promptly send relevant signals back. The signal is fed to the control system of milling machine 1. After receiving the signal, the control system quickly adjusts the running state of the first linear module 101 or the second linear module 102. By controlling the moving speed and direction of the moving block of the first linear module 101 or the moving speed and direction of the moving block of the second linear module 102, the connecting plate 103 and the L-shaped plate 104 are brought back to the preset motion trajectory. This achieves anti-deviation control of the moving parts of the entire milling machine 1, ensuring that the milling machine 1 always maintains a precise motion trajectory during the processing, and ensuring the processing accuracy and quality of the workpiece.

[0025] like Figures 2-3 As shown, the trajectory monitoring mechanism 2 includes a first reflector 201, which is embedded and fixedly installed at one end of the milling machine 1. The first reflector 201 is horizontally opposite to the first laser ranging sensor 202, which is embedded and fixedly installed at one end of the connecting plate 103.

[0026] A U-shaped frame 205 is fixedly installed between the two sides of the connecting plate 103. The U-shaped frame 205 is slidably fitted on the outer surface of the L-shaped plate 104 and a second laser range sensor 203 is embeddedly fixedly installed on one end of the inner side. The second laser range sensor 203 is horizontally opposite to the second reflector 204, and the second reflector 204 is embeddedly fixedly installed at one end of the L-shaped plate 104.

[0027] The first reflector 201 and the second reflector 204 are both V-shaped, and the internal V-shaped reflective surface is stepped. When the connecting plate 103 or the L-shaped plate 104 is tilted, the first laser rangefinder 202 or the second laser rangefinder 203 will be driven to irradiate the stepped reflective surface of the first reflector 201 or the second reflector 204. The signal transmitting end of the first laser rangefinder 202 and the second laser rangefinder 203 is connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electronic control end of the first linear module 101 and the second linear module 102. The models of the first and second laser rangefinders 203 and the controller are LXTLV200X485Q and S7-1200, respectively.

[0028] Through the design of the first reflector 201, the second reflector 204, the first laser rangefinder 202, the second laser rangefinder 203, and the U-shaped frame 205, during the operation of the milling machine 1, when the first linear module 101 drives the connecting plate 103 to slide laterally, the first laser rangefinder 202 embedded in the connecting plate 103 will move synchronously with the connecting plate 103. Since the first laser rangefinder 202 is horizontally opposite to the first reflector 201 embedded in the milling machine 1, it will continuously move in a V-shape. Furthermore, the first reflector 201, with a stepped reflective surface, emits laser light and receives reflected signals, monitoring the distance change between the two in real time. Simultaneously, when the second linear module 102 drives the L-shaped plate 104 to slide longitudinally, the L-shaped plate 104 slides within the U-shaped frames 205 on both sides of the connecting plate 103. The second laser ranging sensor 203 embedded inside the U-shaped frame 205 is horizontally aligned with the second reflector 204 embedded at one end of the L-shaped plate 104. The second laser ranging sensor 203 will emit laser light towards the second reflector 204, which also has a V-shaped reflective surface... The stepped second reflector 204 emits laser light and receives reflected signals, monitoring the distance between the two in real time. When the connecting plate 103 is laterally tilted, the laser beam of the first laser rangefinder 202 will deviate from its original reflection position and irradiate the stepped reflective surface of the first reflector 201, causing a sudden change in the measured distance. Similarly, when the L-shaped plate 104 is longitudinally tilted, the laser beam of the second laser rangefinder 203 will irradiate the stepped reflective surface of the second reflector 204, and the distance data will also change abruptly. The first and second laser rangefinders 203 will transmit the real-time monitored distance data to the controller. The controller analyzes and processes the received data. If it determines that the connecting plate 103 or the L-shaped plate 104 is offset or tilted, it will immediately send an adjustment command to the electronic control terminal of the first linear module 101 or the second linear module 102. By controlling the motion parameters of the linear module moving block, the position of the connecting plate 103 and the L-shaped plate 104 is corrected to ensure that they always move accurately along the preset trajectory, thereby achieving the anti-offset function.

[0029] Based on the above technical solution, the working steps of this solution are summarized as follows: During operation, the milling machine 1 is first started. When it is necessary to drive the connecting plate 103 to drive the subsequent components to achieve lateral movement, the first linear module 101 starts to work. Its moving block moves along a preset lateral trajectory under the drive of the module. Since the connecting plate 103 is fixedly installed at one end of the moving block of the first linear module 101, the connecting plate 103 will slide laterally synchronously with the moving block. At the same time, the two sets of guide rails 105 fixedly installed at one end of the milling machine 1 guide the lateral sliding of the connecting plate 103, preventing the connecting plate 103 from sliding laterally. If the L-shaped plate 104 deviates from the preset trajectory, and it is necessary to drive the L-shaped plate 104 to achieve longitudinal movement, the second linear module 102, which is fixedly installed in the connecting plate 103, is activated. Its moving block moves along the preset longitudinal trajectory. Since the L-shaped plate 104 is fixed to one end of the moving block of the second linear module 102, it will slide longitudinally synchronously with the moving block. At this time, the two sets of guide rails 105 fixedly installed at one end of the connecting plate 103 guide the longitudinal sliding of the L-shaped plate 104, preventing the L-shaped plate 104 from deviating during longitudinal movement. During the entire process of the connecting plate 103 sliding laterally and the L-shaped plate 104 sliding longitudinally... In the process, the first laser rangefinder 202 and the second laser rangefinder 203, respectively fixed to one end of the connecting plate 103 and the L-shaped plate 104, are driven to be horizontally aligned with the first reflector 201 and the second reflector 204, and monitor the distance changes between them in real time. When the connecting plate 103 is laterally tilted, the laser beam of the first laser rangefinder 202 will deviate from its original reflection position and irradiate the stepped reflective surface of the first reflector 201, causing a sudden change in the measured distance. Similarly, when the L-shaped plate 104 is longitudinally tilted, the laser beam of the second laser rangefinder 203 will irradiate... When the distance data reaches the stepped reflective surface of the second reflector 204, a sudden change will occur. The first and second laser rangefinders 203 will transmit the real-time monitored distance data to the controller. The controller analyzes and processes the received data. If it determines that the connecting plate 103 or the L-shaped plate 104 has shifted or deviated, it will immediately send an adjustment command to the electronic control terminal of the first linear module 101 or the second linear module 102. By controlling the motion parameters of the moving block of the linear module, the position of the connecting plate 103 and the L-shaped plate 104 is corrected to ensure that they always move accurately along the preset trajectory, thereby realizing the anti-deviation function.

[0030] In summary: For the lateral deviation of the connecting plate 103, the first reflector 201 and the first laser rangefinder 202 work together to monitor and correct the deviation; for the longitudinal deviation of the L-shaped plate 104, the second reflector 204 and the second laser rangefinder 203 are used to control the deviation, while the U-shaped frame 205 further suppresses the deviation by guiding the sliding of the L-shaped plate 104, forming a two-way anti-deviation system in both the lateral and longitudinal directions, ensuring that there is no risk of deviation during the multi-dimensional movement of the machine tool, and adapting to the multi-directional processing needs of complex parts.

[0031] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC gantry milling machine with an anti-offset structure, characterized in that, include: The milling machine (1) has a first linear module (101) and a second linear module (102). The first linear module (101) has a connecting plate (103) fixedly installed at one end of its moving block. The second linear module (102) is fixedly installed inside the connecting plate (103). The second linear module (102) has an L-shaped plate (104) fixedly installed at one end of its moving block. The connecting plate (103) and the L-shaped plate (104) are both fixedly installed with a trajectory monitoring mechanism (2).

2. A CNC gantry milling machine with an anti-offset structure according to claim 1, characterized in that: Two sets of guide rails (105) are fixedly installed at one end of the milling machine (1) and the connecting plate (103), and each set of guide rails (105) provides the connecting plate (103) and the L-shaped plate (104) with transverse and longitudinal guidance sliding on their outer surfaces.

3. A CNC gantry milling machine with an anti-offset structure according to claim 1, characterized in that: The trajectory monitoring mechanism (2) includes a first reflector (201), which is embedded and fixedly installed at one end of the milling machine (1). The first reflector (201) is horizontally opposite to the first laser ranging sensor (202), which is embedded and fixedly installed at one end of the connecting plate (103).

4. A CNC gantry milling machine with an anti-offset structure according to claim 3, characterized in that: A U-shaped frame (205) is fixedly installed between the two sides of the connecting plate (103). The U-shaped frame (205) slides on the outer surface of the L-shaped plate (104) and a second laser range sensor (203) is embedded in one end of the inner side. The second laser range sensor (203) is horizontally opposite to the second reflector (204), and the second reflector (204) is embedded in one end of the L-shaped plate (104).

5. A CNC gantry milling machine with an anti-offset structure according to claim 3, characterized in that: The first reflector (201) and the second reflector (204) are both V-shaped, and the internal V-shaped reflective surface is stepped. So that when the connecting plate (103) or the L-shaped plate (104) is tilted, the first laser range sensor (202) or the second laser range sensor (203) will be driven to irradiate the stepped reflective surface of the first reflector (201) or the second reflector (204).

6. A CNC gantry milling machine with an anti-offset structure according to claim 5, characterized in that: The signal transmitting ends of the first laser ranging sensor (202) and the second laser ranging sensor (203) are connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electronic control end of the first linear module (101) and the second linear module (102).

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