A fully automatic numerical control planer-type milling machine

Abstract

The utility model discloses a full -automatic numerical control planer type milling machine, include: planer type milling machine body, the sliding platform upper surface fixed mounting of planer type milling machine body has the first connecting plate, the upper surface of first connecting plate has the second connecting plate of aerial installation, so that the interval mouth is formed between, the second connecting plate inner four ends all are equipped with the guide rail mouth, and four sets of guide rail mouth slidingly install automatic centering mechanism. The application is through the design of automatic centering mechanism, makes it through the synchronous push of four groups of push -on plate, has realized the full automation centering positioning of workpiece, has completely avoided the manual operation error, and the whole positioning process does not need manual intervention, avoids the influence of manual operation experience to precision, and the product consistency is improved significantly when batch production, and the unqualified rate is reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of gantry milling machine technology, specifically a fully automatic CNC gantry milling machine. Background Technology

[0002] A gantry milling machine, or simply gantry milling machine, consists of a gantry frame, a bed, a worktable, and an electrical control system. It is classified into two types according to its form: gantry fixed worktable moving type and gantry moving type. According to whether the crossbeam moves on the column, it is classified into two types: moving beam type and fixed beam type. It has the characteristics of sufficient rigidity, high efficiency, and comprehensive performance.

[0003] For example, the national authorized patent announcement number CN218533755U discloses a fully automatic CNC gantry milling machine, including a worktable. Guide slide rods are fixedly connected to the upper ends of both sides of the worktable, and lifting plates are movably connected to the lower ends of the guide slide rods. A protective frame is fixedly connected between the two lifting plates on their opposite sides, and the inner cavity of the protective frame is movably connected to the upper end of the outer surface of the worktable. This utility model, through the coordinated action of a servo motor, screw, cross plate, pull rope, pulley, upright, first piston, first air cylinder, second air cylinder, second piston, push rod, clamping plate, worktable, gantry milling machine body, lifting plates, and protective frame, achieves the purpose of facilitating rapid workpiece fixation in this fully automatic CNC gantry milling machine for precision machining. It is convenient and quick to operate, bringing convenience to workers in batch production of workpieces while greatly improving the overall safety protection effect of the operation.

[0004] However, the aforementioned fully automatic CNC gantry milling machine directly clamps and fixes the workpiece using a clamping plate, but it does not have an automatic centering mechanism. When processing workpieces of different sizes and shapes, it is necessary to manually adjust the position of the workpiece on the worktable to ensure that the center of the workpiece is aligned with the machining center of the milling machine in order to improve accuracy. This process is not only time-consuming, but the accuracy of manual positioning is also easily affected by the operator's experience, making it difficult to meet high-precision requirements. Furthermore, the clamping plate adopts a rigid clamping structure, and the clamping force cannot be precisely controlled. Utility Model Content

[0005] The purpose of this invention is to provide a fully automatic CNC gantry milling machine to solve the problems mentioned in the background art, such as low efficiency and poor accuracy caused by manual workpiece positioning, poor adaptability of rigid clamping structure, easy damage to workpiece, and inability to accurately control clamping force.

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

[0007] A fully automatic CNC gantry milling machine includes: a gantry milling machine body, a first connecting plate fixedly installed on the upper surface of the slide of the gantry milling machine body, a second connecting plate suspended on the upper surface of the first connecting plate, thereby forming an opening between the second connecting plate and the first connecting plate, and guide rail openings are provided at four ends of the second connecting plate, and an automatic centering mechanism is slidably installed in the four sets of guide rail openings.

[0008] Preferably, a cross-shaped placement platform is fixedly installed on the upper surface of the second connecting plate in a protruding shape, and bullseye shafts are rotatably installed on the four extension plates of the cross-shaped placement platform at equal intervals, with the spherical bearings of the bullseye shafts being flush with the height of the cross-shaped placement platform.

[0009] Preferably, the automatic centering mechanism includes four sets of push plates, all of which are slidably installed in the guide rail opening. The lower surface of each push plate extends from the guide rail opening and is equipped with a transmission column located in the interval opening. The transmission column is slidably installed in the push bar opening. The push bar opening is arc-shaped and opened at the four ends of the upper surface of the connecting plate. The connecting plate is fixedly installed on the lower surface of the motor output shaft. The motor is embedded and fixedly installed on the lower surface of the second connecting plate and located in the interval opening.

[0010] Preferably, each of the four sets of push plates is threaded with a wing bolt, and a pressure sensor is rotatably mounted on one end of the threaded portion of the wing bolt.

[0011] Preferably, the signal transmitting end of the pressure sensor 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 motor.

[0012] Preferably, the pressure sensor and controller are model YZC-133 and S7-1200, respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By using a motor-driven synchronous pushing structure in conjunction with closed-loop control of pressure sensors and controllers, high-precision automatic positioning of workpieces is achieved, completely avoiding human error and reducing product scrap rate. It can also be adapted to workpieces of different sizes and shapes through wing bolts without changing special fixtures. At the same time, the pressure threshold can be flexibly set according to the workpiece material to avoid workpiece damage and equipment wear, and significantly improve the efficiency of mass production, providing a stable and efficient solution for high-precision, multi-category workpiece processing. Attached Figure Description

[0015] Figure 1 This is a top view of the overall structure of this utility model;

[0016] Figure 2This is a schematic diagram of the overall side view of the present invention.

[0017] Figure 3 This is a schematic diagram of the connecting disc and the push bar opening of this utility model;

[0018] Figure 4 This is a schematic diagram of the push plate and transmission column of this utility model.

[0019] In the diagram: 1. Gantry milling machine body; 101. First connecting plate; 102. Second connecting plate; 103. Spacing opening; 104. Cross-shaped placement stage; 105. Bullseye shaft; 106. Guide rail opening; 2. Automatic centering mechanism; 201. Connecting plate; 202. Push bar opening; 203. Push plate; 204. Wing bolt; 205. Pressure sensor; 206. Transmission column; 207. Motor. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-4 This embodiment provides the following technical solution:

[0022] like Figures 1-2 As shown, a fully automatic CNC gantry milling machine includes: a gantry milling machine body 1; a first connecting plate 101 is fixedly installed on the upper surface of the slide of the gantry milling machine body 1; a second connecting plate 102 is suspended on the upper surface of the first connecting plate 101, thereby forming a gap 103 between the second connecting plate 102 and the first connecting plate 101; guide rail openings 106 are provided at all four ends of the second connecting plate 102; an automatic centering mechanism 2 is slidably installed in the four sets of guide rail openings 106; a cross-shaped placement platform 104 is fixedly installed on the upper surface of the second connecting plate 102 in a protruding shape; bullseye shafts 105 are rotatably installed at equal intervals on the four sets of extension plates of the cross-shaped placement platform 104; the ball bearings of the bullseye shafts 105 are flush with the height of the cross-shaped placement platform 104.

[0023] Through the design of the first connecting plate 101, the second connecting plate 102, the cross-shaped placement stage 104, the bullseye shaft 105, and the automatic centering mechanism 2, during operation, the workpiece to be processed is first placed on the cross-shaped placement stage 104 protruding from the upper surface of the second connecting plate 102. Since the bullseye shafts 105 are equidistantly rotatably mounted on the four extension plates of the cross-shaped placement stage 104, and the ball bearings of the bullseye shafts 105 are flush with the height of the cross-shaped placement stage 104, the initial position of the workpiece can be easily adjusted using the rotational characteristics of the bullseye shafts 105, reducing the frictional resistance between the workpiece and the placement stage, facilitating subsequent automatic centering operations. Then, the automatic centering mechanism 2 can be activated, causing it to move synchronously towards the workpiece under the guidance of the guide rail 106. As the automatic centering mechanism 2 continues to move and... When in contact with the workpiece, the workpiece slides smoothly on the bullseye shaft 105 of the cross-shaped placement table 104 until it is pushed up and aligned with the machining center of the gantry milling machine body 1, achieving automatic centering positioning. During the pushing and clamping process, the clamping force of the workpiece is detected in real time, and the displacement stops when the set force is reached. At this time, the automatic centering mechanism 2 maintains a stable limit state for the workpiece, ensuring that the workpiece will not be displaced during subsequent processing. Then, the slide of the gantry milling machine body 1 drives the first connecting plate 101, the second connecting plate 102 and the centered workpiece to move according to the preset program, completing the precise machining of the workpiece. The entire positioning process does not require manual intervention, avoiding the influence of manual operation experience on accuracy. During mass production, product consistency is significantly improved and the defect rate is greatly reduced.

[0024] like Figures 3-4 As shown, the automatic centering mechanism 2 includes four sets of push plates 203. All four sets of push plates 203 are slidably installed in the guide rail opening 106. The lower surface of the push plate 203 extends from the guide rail opening 106 and is equipped with a transmission column 206 located in the interval opening 103. The transmission column 206 is slidably installed in the push bar opening 202. The push bar opening 202 is arc-shaped and opened at the four ends of the upper surface of the connecting plate 201. The connecting plate 201 is fixedly installed on the lower surface of the output shaft of the motor 207. The motor 207 is embedded and fixedly installed on the lower surface of the second connecting plate 102 and located in the interval opening 103.

[0025] Each of the four push plates 203 has a wing bolt 204 threadedly installed inside. A pressure sensor 205 is rotatably installed on one end of the threaded part of the wing bolt 204. The signal transmitting end of the pressure sensor 205 is connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electrical control end of the motor 207. The pressure sensor 205 and the controller are model YZC-133 and S7-1200, respectively.

[0026] Through the design of the connecting plate 201, push bar opening 202, push plate 203, wing bolt 204, pressure sensor 205, transmission column 206, and motor 207, when positioning the workpiece, the motor 207, which is connected to the controller's electrical control terminal, first receives the start signal from the controller. Since the motor 207 is embedded and fixed on the lower surface of the second connecting plate 102 and located within the spacer 103, its output shaft will drive the connecting plate 201, which is fixed on the lower surface of the shaft end, to rotate synchronously. The upper surface of the connecting plate 201 has arc-shaped push bar openings 202 at four ends, and a transmission column is slidably installed within the push bar openings 202. The drive column 206 is fixedly connected to the lower surface of the push plate 203 extending from the guide rail opening 106 into the spacer opening 103. Therefore, as the connecting plate 201 rotates, the arc-shaped push bar opening 202 guides the drive column 206, thereby pulling the drive column 206 to drive the push plate 203 to move radially synchronously within the guide rail opening 106 of the second connecting plate 102. This allows the four sets of push plates 203 to simultaneously move towards the workpiece on the cross-shaped placement table 104 under the limitation of the guide rail opening 106. During the movement of the push plates 203 towards the workpiece, the four sets of push plates... A wing bolt 204 is threaded into each of the push plates 203, and a pressure sensor 205 is rotatably mounted on one end of the threaded portion of the wing bolt 204. When the push plate 203 drives the pressure sensor 205 to contact the workpiece surface, as the push plate 203 continues to move, the pressure sensor 205 will receive the reaction force from the workpiece and generate a pressure signal. At this time, the signal transmitting end of the pressure sensor 205 will transmit the real-time detected pressure data to the signal receiving end of the controller. The controller will analyze and process the received pressure signal. When the pressure value reaches the preset clamping threshold, the controller will immediately send a signal to the electric control of the motor 207. When the end sends a stop signal, the motor 207 stops rotating, the connecting plate 201 stops, the push bar 202 no longer drives the transmission column 206 to move, and the push plate 203 also stops applying pressure to the workpiece. At this time, the workpiece is stably limited at the machining center by the four sets of pressure sensors 205, completing the automatic centering positioning. Before pushing the workpiece, the wing bolt 204 can be rotated according to the length and width of the workpiece to drive the pressure sensor 205 to extend inward, so that it can accurately adapt to workpieces of different length and width, avoiding the problems of over-adjustment or failure to reach, and enabling the automatic centering mechanism 2 to cover a wider range of workpiece sizes.

[0027] Based on the above technical solution, the working steps of this solution are summarized as follows: During operation, the workpiece to be processed is first placed on the cross-shaped placement platform 104 protruding from the upper surface of the second connecting plate 102. Since bullseye shafts 105 are equidistantly rotatably mounted on the four extension plates of the cross-shaped placement platform 104, and the ball bearings of the bullseye shafts 105 are flush with the height of the cross-shaped placement platform 104, the initial position of the workpiece can be easily adjusted by utilizing the rotational characteristics of the bullseye shafts 105, reducing the frictional resistance between the workpiece and the placement platform, facilitating subsequent automatic centering operations. Then, the motor 207 can be started to drive the connecting plate 201 fixed at the shaft end to rotate. The upper surface of the connecting plate 201 has four curved push bar openings 202 at its four ends. A transmission column 206 is slidably installed inside the push bar opening 202. The transmission column 206 is fixedly connected to the lower surface of the push plate 203 extending from the guide rail opening 106 to the spacer opening 103. Therefore, as the connecting plate 201 rotates, the curved push bar openings 202 guide the transmission column 206, thereby pulling the transmission column 206 to drive the push plate 203 to move radially synchronously within the guide rail opening 106 of the second connecting plate 102. This allows the four sets of push plates 203 to move simultaneously onto the cross-shaped placement platform 104 under the limit of the guide rail opening 106. As the push plate 203 moves towards the workpiece, and because each of the four push plates 203 is threaded with a wing bolt 204, and a pressure sensor 205 is rotatably mounted on one end of the threaded portion of the wing bolt 204, when the push plate 203 drives the pressure sensor 205 to contact the workpiece surface, as the push plate 203 continues to move, the pressure sensor 205 will be subjected to the reaction force of the workpiece and generate a pressure signal. At this time, the signal transmitting end of the pressure sensor 205 will transmit the real-time detected pressure data to the signal receiving end of the controller. The controller will analyze and process the received pressure signal. When the value reaches the preset clamping threshold, the controller will immediately send a stop signal to the electrical control terminal of the motor 207. The motor 207 will stop rotating, the connecting plate 201 will stop, the push bar 202 will no longer drive the transmission column 206 to move, and the push plate 203 will also stop applying pressure to the workpiece. At this time, the workpiece is stably limited at the machining center by the four sets of pressure sensors 205, completing automatic centering positioning. In addition, before pushing the workpiece, the wing bolt 204 can be rotated according to the length and width of the workpiece to drive the pressure sensor 205 to extend inward, so as to achieve precise adaptation to workpieces of different length and width, avoiding the problems of over-adjustment or failure to reach.

[0028] In summary, the synchronous pushing of four sets of push plates 203 achieves fully automated centering and positioning of the workpiece, completely avoiding human error. The entire positioning process requires no human intervention, avoiding the impact of human experience on accuracy. This significantly improves product consistency and greatly reduces the defect rate during mass production.

[0029] 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 fully automatic CNC gantry milling machine, characterized in that, include: The gantry milling machine body (1) has a first connecting plate (101) fixedly installed on the upper surface of the slide table. A second connecting plate (102) is suspended on the upper surface of the first connecting plate (101) so that a gap (103) is formed between the second connecting plate (102) and the first connecting plate (101). The second connecting plate (102) has guide rail openings (106) at all four ends. An automatic centering mechanism (2) is slidably installed in the four sets of guide rail openings (106).

2. The fully automatic CNC gantry milling machine according to claim 1, characterized in that: The upper surface of the second connecting plate (102) is fixedly mounted with a cross-shaped placement platform (104) protruding outwards. Bullseye shafts (105) are rotatably mounted on the four extension plates of the cross-shaped placement platform (104) at equal intervals. The spherical bearing of the bullseye shaft (105) is flush with the height of the cross-shaped placement platform (104).

3. The fully automatic CNC gantry milling machine according to claim 1, characterized in that: The automatic centering mechanism (2) includes four sets of push plates (203). All four sets of push plates (203) are slidably installed in the guide rail opening (106). The lower surface of the push plate (203) extends from the guide rail opening (106) and is equipped with a transmission column (206) located in the interval opening (103). The transmission column (206) is slidably installed in the push bar opening (202). The push bar opening (202) is arc-shaped and opened at the four ends of the upper surface of the connecting plate (201). The connecting plate (201) is fixedly installed on the lower surface of the output shaft of the motor (207). The motor (207) is embedded and fixedly installed on the lower surface of the second connecting plate (102) and located in the interval opening (103).

4. The fully automatic CNC gantry milling machine according to claim 3, characterized in that: Each of the four push plates (203) is threaded with a wing bolt (204), and a pressure sensor (205) is rotatably mounted on one end of the threaded portion of the wing bolt (204).

5. A fully automatic CNC gantry milling machine according to claim 4, characterized in that: The signal transmitting end of the pressure sensor (205) is connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electrical control end of the motor (207).

6. The fully automatic CNC gantry milling machine according to claim 5, characterized in that: The pressure sensor (205) and controller are model numbers YZC-133 and S7-1200, respectively.

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