CNC machine table for mobile phone metal middle frame

Abstract

A CNC machine table for a metal middle frame of a mobile phone aims at solving the problems that an existing CNC machine table for the metal middle frame of the mobile phone is low in efficiency and low in yield in a manual material taking and placing mode, and the CNC machine table comprises a table base, a CNC main shaft, a workbench, a material grabbing mechanism, a material loading mechanism, a plurality of supports, a clamp and a tool magazine rotating disc. The CNC main shaft is fixedly connected to the pedestal, the workbench is movably connected to the pedestal, the loading mechanism and the clamps are arranged on the workbench at intervals, the support is used for containing products to be machined and can be placed on a containing plate of the loading mechanism in a stacked mode, the grabbing mechanism and the tool magazine rotating disc are arranged on the CNC main shaft, and the tool magazine rotating disc comprises common tools for CNC machining. The grabbing mechanism transfers a to-be-machined product to the clamp for machining through the XYZ three-axis moving mechanism and the vacuum suction nozzle. According to the scheme, the material taking and placing mode replaces a traditional manual material taking and placing mode, the material taking and placing speed is greatly increased, and the production efficiency and the yield of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone metal frame processing technology, and in particular to a CNC machine tool for mobile phone metal frames. Background Technology

[0002] The metal frame of a mobile phone is a crucial component, and CNC machining is the primary method for processing it. Currently, the CNC machines used for processing mobile phone metal frames rely on manual material handling. This manual handling allows only one finished / to-be-processed product to be picked up and placed at a time, resulting in slow speed, low efficiency, and high labor costs. Furthermore, the inherent randomness of manual handling can easily lead to errors, significantly impacting product yield and thus lowering overall production efficiency. Therefore, changing the existing material handling method for CNC machining of mobile phone metal frames is an urgent problem to be solved. Utility Model Content

[0003] Therefore, it is necessary to provide a CNC machine tool with a material handling method that has high operating efficiency, low operating cost and can improve product yield, in order to address the above-mentioned shortcomings.

[0004] A CNC machine tool for a metal frame of a mobile phone includes a base, a worktable disposed on the upper surface of the base and movable within the upper surface of the base, a CNC spindle fixed on the upper surface of the base and located beside the worktable, a loading mechanism, a gripping mechanism, a tool magazine turntable located beside the gripping mechanism, a fixture disposed on the worktable and located below the tool magazine turntable, and a main controller. The CNC spindle has a lifting part that can move in the vertical direction. The gripping mechanism and the tool magazine turntable are suspended above the worktable and are both fixedly connected to the lifting part.

[0005] The loading mechanism is located beside the clamp and corresponds to the gripping mechanism. The loading mechanism includes at least one placement plate on the upper surface of the workbench, and the placement plate is provided with at least one bracket for holding the product to be processed.

[0006] The material handling mechanism includes: a mounting frame fixedly connected to the lifting unit, an XYZ three-axis moving mechanism mounted on the mounting frame, and a vacuum nozzle fixedly connected to the movable end of the XYZ three-axis moving mechanism. The vacuum nozzle is connected to an external vacuum device and is used to pick up the product to be processed.

[0007] The fixture includes: a processing plate fixed to the upper surface of the workbench and having a product mounting slot, a cover plate movably covering the opening of the product mounting slot, and a rotating clamping claw mounted on the processing plate for pressing or releasing the cover plate.

[0008] The tool magazine turntable is equipped with a magnetic suction head for picking up the cover plate to open the product mounting slot, and several cutting tools for processing the product.

[0009] The main controller is electrically connected to the CNC spindle, the worktable, the XYZ three-axis moving mechanism, the rotary gripper, the tool magazine turntable, and the external vacuum equipment.

[0010] In one embodiment, the material gripping mechanism further includes: a first telescopic drive member fixed on the mounting frame, and two hooks fixed on the telescopic end of the first telescopic drive member for hooking the bracket. The first telescopic drive member drives the two hooks to rise and fall to hook the bracket. The first telescopic drive member is electrically connected to the main controller.

[0011] In one embodiment, the bottom of the hook is provided with a hook portion, and the hook also includes a second telescopic drive member located above the hook portion and a fixed plate fixedly connected to the telescopic end of the second telescopic drive member. The second telescopic drive member drives the fixed plate to rise and fall, so that the fixed plate moves closer to or away from the hook portion to clamp the bracket. The second telescopic drive member is electrically connected to the main controller.

[0012] In one embodiment, the support includes a support mother frame and a plurality of support sub-frames arranged at intervals and detachably mounted on the support mother frame. The support sub-frames have product mounting positions with shapes adapted to the products to be processed. The upper surface of the support mother frame is provided with a plurality of protrusions, and the lower surface of the support mother frame is provided with a plurality of grooves corresponding one-to-one with the protrusions.

[0013] In one embodiment, the bracket subframe is provided with a plurality of snap-fit ​​connectors, and the bracket mother frame is provided with slots corresponding to the snap-fit ​​connectors.

[0014] In one embodiment, the loading mechanism further includes: at least one base plate fixedly connected to the workbench, a guide post fixedly connected to the base plate in a vertical direction and passing through the placement plate, a third telescopic drive member fixed to the base plate, and a top rod hingedly connected to the telescopic end of the third telescopic drive member and the placement plate respectively. The top rod swings when the telescopic end of the third telescopic drive member moves to drive the placement plate to rise and fall along the guide post. The third telescopic drive member is electrically connected to the main controller.

[0015] In one embodiment, the placement plate is provided with a first positioning pin for positioning the bracket, and the bracket is provided with a through hole corresponding to the first positioning pin.

[0016] In one embodiment, a secondary positioning fixture is also provided next to the fixture. The secondary positioning fixture includes: a support plate fixedly connected to the worktable in a vertical direction, a positioning plate fixedly connected to the upper end of the support plate and having a vacuum suction hole, the vacuum suction hole being connected to an external vacuuming device, and the positioning plate having a second positioning pin and a guide block for product positioning.

[0017] In one embodiment, the secondary positioning fixture further includes a photoelectric sensor mounted on a support plate for detecting the product loading status, and the photoelectric sensor is electrically connected to the main controller.

[0018] In one embodiment, the tool magazine turntable further includes a probe for detecting the height of the support on the loading mechanism, the probe being electrically connected to the main controller.

[0019] This invention relates to a CNC machine tool for manufacturing metal frames for mobile phones. Several supports holding products to be processed are stacked on a loading mechanism. The XYZ three-axis moving mechanism of the gripping mechanism drives a vacuum suction nozzle to pick up the products from the supports and transfer them to a fixture. After being secured by a cover plate and several clamping claws, CNC machining is performed. After machining, the fixture is released, and the gripping mechanism transfers the finished product back to the supports. This technical solution replaces the traditional manual material handling method, eliminating the randomness of manual material handling, greatly improving the efficiency of material handling, effectively reducing the labor intensity of workers, and thus improving product production efficiency and yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a CNC machine tool in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the material gripping mechanism in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the loading mechanism (without a support) in one embodiment of the present invention;

[0023] Figure 4 This is a partially enlarged schematic diagram of the loading mechanism (placement bracket) in one embodiment of the present invention;

[0024] Figure 5 This is an enlarged structural schematic diagram of the clamp in one embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the magnetic suction head in one embodiment of the present invention;

[0026] Figure 7This is a schematic diagram of the secondary positioning fixture in one embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 10-CNC machine tool, 100-base, 200-CNC spindle, 210-lifting unit, 300-worktable, 400-gripping mechanism, 500-loading mechanism, 600-clamp, 700-tool magazine turntable, 800-secondary positioning fixture, 410-mounting bracket, 420-XYZ three-axis moving mechanism, 430-vacuum nozzle, 440-first telescopic drive component, 450-hook, 451-second telescopic drive component, 452-fixed plate, 510-placement plate, 5 11-First positioning pin, 520-Guide post, 530-Base plate, 540-Third telescopic drive component, 550-Top rod, 560-Bracket, 561-Bracket mother frame, 562-Bracket daughter frame, 610-Processing plate, 620-Cover plate, 630-Rotating clamping claw, 710-Magnetic suction head, 711-Connecting handle, 712-Suction cup, 713-Magnet, 810-Support plate, 820-Positioning plate, 821-Vacuum hole, 822-Second positioning pin, 823-Guide block, 830-Photoelectric sensor. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In this solution, "product" refers to the metal frame of a mobile phone, "product to be processed" refers to the metal frame of a mobile phone to be processed, and "finished product" refers to the metal frame of a mobile phone that has already been processed. In this solution, the XYZ axis directions are as follows: Figure 1 As shown on the coordinate axes.

[0030] This utility model discloses a CNC machine tool for a metal frame of a mobile phone. For details, please refer to... Figure 1-7The CNC machine tool 10 for the metal frame of a mobile phone in this embodiment includes: a base 100 for supporting components, a worktable 300 disposed on the upper surface of the base 100 and movable within the surface, a CNC spindle 200 fixed on the upper surface of the base 100 and located beside the worktable 300, a loading mechanism 500, a gripping mechanism 400, a tool magazine turntable 700 located beside the gripping mechanism 400, a clamp 600 disposed on the worktable 300 and located below the tool magazine turntable 700, and a main controller (not shown in the figure). The CNC spindle 200 has a lifting part 210 that can move in the vertical direction. A cylinder or linear module electrically connected to the main controller is disposed inside the CNC spindle 200. The cylinder or linear module drives the lifting part 210 to move in the vertical direction. The gripping mechanism 400 and the tool magazine turntable 700 are suspended above the worktable 300 and are both fixedly connected to the lifting part 210.

[0031] In this embodiment, the base 100 is used to support the components on the CNC machine tool 10. The CNC spindle 200 is fixedly connected to the base 100 in the vertical direction. The worktable 300 is located directly in front of the CNC spindle 200 and is movably connected to the base 100 via two slide rails arranged along the X and Y axes. The worktable 300 can move along these two slide rails on a certain horizontal plane, that is, the worktable 300 can move along the X and Y axes. The material gripping mechanism 400 and the tool magazine turntable 700 are fixedly connected to the lifting part 21 of the CNC spindle 200. The tool magazine rotary table 700 is located on the side of the CNC spindle 200 facing the worktable 300 and directly above the worktable 300. It is moved up and down, approaching and moving away from the worktable 300, driven by the lifting part 210 of the CNC spindle 200. The material gripping mechanism 400 is located adjacent to the CNC spindle 200. The loading mechanism 500 is located on the same side of the CNC spindle 200 as the material gripping mechanism 400. The loading mechanism 500 includes two placement plates 510 for placing supports 560. Multiple supports 560 can be neatly stacked. Each bracket 560 holds three products to be processed; the material handling mechanism 400 includes: a mounting frame 410, an XYZ three-axis moving mechanism 420 fixedly connected to the mounting frame 410, and a vacuum nozzle 430 connected to the XYZ three-axis moving mechanism 420. The XYZ three-axis moving mechanism 420 includes: a Z-axis cylinder fixed to the mounting frame 410 along the Z-axis direction, a Y-axis cylinder fixed to the telescopic end of the Z-axis cylinder and perpendicular to the Z-axis along the Y-axis direction, and a Y-axis cylinder fixed to the telescopic end of the Y-axis cylinder and perpendicular to the Y-axis along the X-axis direction. The X-axis cylinder and the connecting plate set at the telescopic end of the X-axis cylinder for fixing the vacuum nozzle 430 are included. The main controller is electrically connected to the solenoid valves on the power source air circuits of the Z-axis cylinder, Y-axis cylinder and X-axis cylinder. The main controller controls the operation of the XYZ three-axis moving mechanism 420 by controlling the opening or closing of the solenoid valves. The three cylinders can also be replaced with hydraulic cylinders or electric cylinders. The main controller is electrically connected to the oil pump of the hydraulic cylinder or the motor of the electric cylinder. The main controller controls the opening and closing of the oil pump or motor, thereby controlling the operation of the XYZ three-axis moving mechanism 420.The material gripping mechanism 400 is fixedly connected to the lifting part 210 of the CNC spindle 200 via the mounting bracket 410. The vacuum nozzle 430 can be driven by the CNC spindle 200 and the XYZ three-axis moving mechanism 420, moving along the X, Y, and Z axes to approach the product to be processed on the support 560. The vacuum nozzle 430 is connected to an external vacuuming device (not shown in the figure). When the vacuum nozzle 430 approaches a suitable position on the product to be processed, a vacuum is drawn, which can then suck up the product. A clamp 600 is fixedly connected to the worktable 300 below the tool magazine turntable 700, which is also the position for processing the product. The clamp 600 includes: a processing plate 610 with a mounting groove adapted to the size of the product to be processed, a cover plate 620, and six rotatable rotating jaws 630 to press or release the cover plate 620. The mounting slot of plate 610 is used to receive the product to be processed from the vacuum nozzle 430 of the gripping mechanism 400 and transfer it to the fixture 600. The cover plate 620 and six rotating pressure claws 630 are used to fix the product to be processed during processing. The rotating pressure claws 630 have two installation methods and corresponding driving methods: one is that the rotating pressure claws 630 are rotatably connected to the processing plate 610 by screws or pins and are rotated manually; the other is that the pressure block of the rotating pressure claws 630 is fixedly connected to one end of the transmission rod, and the other end of the transmission rod is provided with a driven gear. The driven gear meshes with the driving gear on the power shaft of a servo motor. The servo motor is electrically connected to the main controller. The main controller controls the servo motor to start, and its power shaft rotates to drive the driving gear on it to rotate. Through the meshing of the driving gear and the driven gear, the transmission rod and the rotating pressure claws 630 on the transmission rod are rotated. The tool magazine turntable 700 includes: commonly used CNC machining tools and a magnetic chuck 710. The tool magazine turntable 700 rotates to select the appropriate tool for CNC machining of the product to be machined. The cover plate 620 is made of magnetic material. The magnetic chuck 710 has several ring magnets 713 for picking up, removing and placing the cover plate 620.

[0032] In this embodiment, the process of machining a mobile phone metal frame using the CNC machine tool 10 of this solution is as follows: The operator manually places the bracket 560 containing the product to be processed onto the placement plate 510 of the loading mechanism 500. The moving worktable 300 moves the fixture 600 directly below the tool magazine turntable 700. The tool magazine turntable 700 is rotated to select the magnetic suction head 710. Simultaneously, the six rotating jaws 630 on the fixture 600 rotate and open, making the cover plate 620 movable. The CNC spindle 200 drives the tool magazine turntable 700, which in turn drives the magnetic suction head 710, to move downwards onto the cover plate 620. At this time, the cover plate 620 is attracted to the magnetic suction head 710 by the magnetic force of the annular magnet 713 on the magnetic suction head 710. The CNC spindle 200 drives the tool magazine turntable 700 to select the magnetic suction head 710. The disk 700 drives the magnetic suction head 710 upward, lifting the cover plate 620 to a preset height. The worktable 300 drives the loading mechanism 500 to move, and the XYZ three-axis moving mechanism 420 of the gripping mechanism 400 drives the vacuum nozzle 430 to move. Under the combined action of the above two, the vacuum nozzle 430 moves above the product to be processed and fits against the product. The external vacuum equipment is turned on, and atmospheric pressure is used to suction the product to be processed onto the vacuum nozzle 430. The worktable 300 drives the clamp 600 to move, and the XYZ three-axis moving mechanism 420 of the gripping mechanism 400 drives the vacuum nozzle 430 to move, so that the vacuum nozzle 430 and the product to be processed are moved onto the mounting slot of the processing plate 610. The vacuum state is released, and the product to be processed is placed on the mounting slot. The workpiece is placed on the machining plate 610 of the fixture 600. The worktable 300 moves the fixture 600, positioning the workpiece directly below the tool magazine turntable 700. The CNC spindle 200 moves the tool magazine turntable 700, which in turn moves the magnetic chuck 710 and cover plate 620 downwards, so that the cover plate 620 fits against the workpiece. Six rotating jaws 630 rotate and press against the cover plate 620. The CNC spindle 200 moves the tool magazine turntable 700, which in turn moves the magnetic chuck 710 upwards. Under the action of the six rotating jaws 630, the magnetic chuck 710 disengages from the cover plate 620. The tool magazine turntable 700 is rotated to select a suitable tool to begin CNC machining. After machining, the six rotating jaws 630 on the fixture 600 rotate and open, and the tool magazine turntable is rotated... The magnetic suction head 710 is selected on the tray 700. As mentioned above, the cover plate 620 is attached to the magnetic suction head 710. The worktable 300 moves the clamp 600, and the XYZ three-axis moving mechanism 420 of the gripping mechanism 400 moves the vacuum nozzle 430, so that the vacuum nozzle 430 moves to the finished product and fits against the product. The external vacuum equipment is turned on, and the finished product is adsorbed onto the vacuum nozzle 430. The worktable 300 moves the loading mechanism 500, and the XYZ three-axis moving mechanism 420 of the gripping mechanism 400 moves the vacuum nozzle 430, so that the vacuum nozzle 430 and the finished product move to the original position of the bracket 560 of the loading mechanism 400. Thus, the CNC machining of one product is completed.By repeating the above process, the products to be processed placed on the support 560 of the loading mechanism 400 can be automatically processed by CNC. Unlike the traditional manual loading and unloading method, the loading and unloading method of the CNC machine tool in this solution is fast and effectively reduces the random disturbances that are easy to occur when manually loading and unloading materials, which greatly improves the processing efficiency and yield.

[0033] It should be noted that the main controller is used to control the operation of the entire machine. The main controller can be a microcontroller or a PLC controller. The main controller is electrically connected to the following components: CNC spindle 200, worktable 300, XYZ three-axis moving mechanism 420, rotary gripper 630, tool magazine turntable 700, first telescopic drive 440, second telescopic drive 451, third telescopic drive 540, photoelectric sensor 830, probe, and external vacuum equipment.

[0034] In one embodiment, the material gripping mechanism 400 further includes: a first telescopic drive member 440 and two hooks 450. One end of the first telescopic drive member 440 is fixedly connected to the XYZ three-axis moving mechanism 420, and the other end is fixedly connected to the two hooks 450. The first telescopic drive member 440 is a cylinder arranged along the Z-axis direction. The air source solenoid valve for controlling the action of the first telescopic drive member 440 is electrically connected to the main controller. The main controller controls the extension and retraction of the first telescopic drive member 440 by controlling the opening or closing of the solenoid valve, thereby driving the two hooks 450 to rise and fall. The cylinder can also be a hydraulic cylinder or an electric cylinder. The main controller is electrically connected to the oil pump of the hydraulic cylinder or the motor of the electric cylinder. The main controller controls the opening and closing of the oil pump or motor, thereby controlling the extension and retraction of the first telescopic drive member 440. Two hooks 450 are distributed on both sides of the vacuum nozzle 430. The bracket 560 has an L-shaped through-hole with a first telescopic drive 440 that moves the hooks 450 vertically up and down. The hooks 450 are used to hook the bracket 560. To avoid affecting the movement of the vacuum nozzle 430 during CNC machining, the hooks 450 are always positioned above the vacuum nozzle 430 when hooking the bracket 560 is not required. When hooking the bracket 560 is needed, the XYZ three-axis moving mechanism 420 moves the hooks 450 above the L-shaped through-hole of the bracket 560. The CNC spindle 200 and the XYZ three-axis moving mechanism 420 move the hooks 450 downwards, causing the hook portion to enter the wider end of the L-shaped through-hole. The worktable 300 moves the loading mechanism 500 and its bracket 560, causing the vertical portion above the hook portion of the hooks 450 to slide into the narrower end of the L-shaped through-hole. The XYZ three-axis moving mechanism... The mechanism 420 drives the hook 450 to move upward, lifting the bracket 560. The worktable 300 drives the loading mechanism 500 to move, so that the bracket 560 moves to another placement plate 510 for placing the processed products. The worktable 300 drives the loading mechanism 500 and the bracket 560 on it to move, so that the hook part of the hook 450 slides out from the narrower end of the L-shaped through hole. The XYZ three-axis moving mechanism 420 drives the hook 450 back to the initial position, and continues the CNC machining of the remaining products to be processed.

[0035] In one embodiment, based on the previous embodiment, a second telescopic drive member 451 is fixedly connected to the surface of the vertical portion on the same side as the hook portion of each hook 450. A fixing plate 452 is fixedly connected to one end of the second telescopic drive member 451 facing the hook portion of the hook 450. The second telescopic drive member 451 is a cylinder arranged along the Z-axis direction. The air source solenoid valve for controlling the action of the second telescopic drive member 451 is electrically connected to the main controller. The main controller controls the extension and retraction of the second telescopic drive member 451 by controlling the opening or closing of the solenoid valve, thereby driving the fixing plate 452 to rise and fall. The cylinder can also be a hydraulic cylinder or an electric cylinder. The main controller is electrically connected to the oil pump of the hydraulic cylinder or the motor of the electric cylinder. The main controller controls the opening and closing of the oil pump or motor, thereby controlling the extension and retraction of the second telescopic drive member 451. To make the hooking of bracket 560 more stable, when the hook of hook 450 slides into the L-shaped groove, the second telescopic drive 451 drives the fixing plate 452 to move downward until the hook of hook 450 and the fixing plate 452 work together to clamp bracket 560. At this time, moving bracket 560 will be more stable.

[0036] In one embodiment, each bracket 560 consists of a bracket mother frame 561 and three bracket sub-frames 562. The three bracket sub-frames 562 are arranged sequentially on the bracket mother frame 561 at intervals. The bracket mother frame 561 and the bracket sub-frames 562 are detachably connected. The corresponding bracket sub-frame 562 is selected according to the different products to be processed. The upper surface of the bracket mother frame 561 is provided with several protrusions. The lower surface of the bracket mother frame 561 is recessed upward at the positions corresponding to the above-mentioned protrusions to accommodate the protrusions. The height of the protrusions is greater than the depth of the recess, ensuring that there is a gap between the product to be processed and the bracket 560, thereby realizing the stacking of the brackets 560.

[0037] In one embodiment, the support sub-frame 562 is provided with a plurality of snap-fit ​​connectors, and the support mother frame 561 is provided with snap-fit ​​slots corresponding to the snap-fit ​​connectors. The support sub-frame is connected to the support mother frame by snap-fit ​​to achieve quick disassembly, thereby enabling the support sub-frame to be replaced at any time according to the model of the product to be processed.

[0038] In one embodiment, the loading mechanism 500 further includes: two base plates fixedly connected to the workbench 300 in sequence; a guide post 520 vertically disposed on the base plate 530 and passing through the placement plate 510; a third telescopic drive member 540 fixed on the base plate; a top rod 550 hingedly connected to the telescopic end of the third telescopic drive member 540 and the placement plate 510 respectively; a cylinder disposed along the X-axis or Y-axis of the third telescopic drive member 540; and an air source solenoid valve for controlling the movement of the third telescopic drive member 540 electrically connected to the main controller. The main controller controls the extension and retraction of the third telescopic drive member 540 by controlling the opening or closing of the solenoid valve, thereby driving the top rod 550 to swing, so that the placement plate 510 can rise and fall along the guide post 520. The cylinder can also be a hydraulic cylinder or an electric cylinder. The main controller is electrically connected to the oil pump of the hydraulic cylinder or the motor of the electric cylinder. The main controller controls the opening and closing of the oil pump or motor, thereby controlling the extension and retraction of the third telescopic drive member 540. In the initial state, the top rod 550 is placed horizontally, with an angle of 0° between it and the base plate 530. At this time, the placement plate 510 is at its lowest height. The third telescopic drive 540 drives the top rod 550 to swing, and the angle between the top rod 550 and the base plate 530 gradually increases, causing the placement plate 510 to move upward until the angle between the top rod 550 and the base plate 530 is 90°, at which point the placement plate 510 is at its highest height. The third telescopic drive 540 controls the movement of the placement plate 510 between these two heights. When all the products on one bracket 560 have been processed, the gripping mechanism 400 hooks the bracket 560 and transfers it from one placement plate 510 to another. The third telescopic drive 540 drives the two top rods 550 to control the placement plate 510 to move to the optimal position, thereby reducing the time for the gripping mechanism 400 to transfer the bracket 560 and further improving product processing efficiency.

[0039] In one embodiment, based on the previous embodiment, each placement plate 510 is provided with a first positioning pin 511, and each bracket 560 has a through hole corresponding to the first positioning pin 511 on its lower surface. This ensures that the bracket 560 is always in the correct position when it moves to the placement plate 510, effectively avoiding the problem of the bracket 560 not being stacked correctly due to changes in the position of the bracket 560 caused by slight disturbances, which is conducive to the smooth progress of production activities.

[0040] In one embodiment, the CNC machine tool 10 further includes a secondary positioning fixture 800 disposed between the fixture 600 and the CNC spindle 200 and fixedly connected to the worktable 300. The secondary positioning fixture 800 includes a support plate 810 fixedly connected to the worktable 300 in a vertical direction and a positioning plate 820 fixedly connected to the upper end of the support plate 810. The upper surface of the positioning plate 820 is provided with a vacuum suction hole 821 communicating with an external vacuum device. The positioning plate 820 is provided with a guide block 823 and a second positioning pin 822. Before CNC machining, the material gripping mechanism 400 picks up the product to be processed from the bracket 560, and then the XYZ three-axis moving mechanism... The combined action of 420 and worktable 300 moves the product to be processed onto the secondary positioning fixture 800. The vacuum nozzle 430 of the gripping mechanism 400 releases the vacuum, and the vacuum suction hole 821 on the secondary positioning fixture 800 begins to draw a vacuum, adsorbing the product to be processed onto the positioning plate 820, completing the secondary positioning. Subsequently, the vacuum suction hole 821 on the secondary positioning fixture 800 releases the vacuum, and the gripping mechanism 400 picks up the product to be processed and transfers it to the fixture 600 for CNC machining. The secondary positioning can effectively reduce the positioning error generated during the transfer of the product to be processed, effectively reduce the generation of defective products, and improve the yield rate of production.

[0041] In one embodiment, based on the previous embodiment, the secondary positioning fixture 800 further includes a photoelectric sensor 830. The photoelectric sensor 830 is electrically connected to the main controller and is used to send a signal to the main controller that the product to be processed has reached the designated position when it approaches the secondary positioning fixture 800 during secondary positioning. Subsequently, the main controller releases the vacuum state of the vacuum nozzle 430 of the gripping mechanism 400, opens the external vacuum equipment and connects to the vacuum suction hole 821 on the secondary positioning fixture 800 to start vacuuming, adsorbing the product to be processed onto the positioning plate 820. The photoelectric sensor 830 transmits a signal to the main controller to control the external vacuum equipment to perform secondary positioning of the product to be processed at the optimal position, which can effectively improve the accuracy and speed of secondary positioning and further improve the product yield.

[0042] In one embodiment, the tool magazine turntable 700 further includes a probe used to detect whether the height of the bracket 560 on the loading mechanism 500 meets the processing standard. In this embodiment, the preset number of layers in the processing program is 8. The worker stacks the brackets 560 containing the products to be processed on the loading mechanism 500. After processing begins, the tool magazine turntable 700 rotates, selects the probe, and moves the CNC spindle 200 to the corresponding position according to the preset number of layers. The worktable 300 moves the loading mechanism close to the probe and contacts it to determine whether the height required for placing the preset number of layers of brackets 560 has been reached. If the worker has placed 8 layers of brackets 560, the subsequent processing continues; if the worker has not placed 8 layers of brackets, the subsequent processing stops and an alarm is triggered.

[0043] The CNC machine tool of this utility model adopts a material handling method that is different from the traditional manual material handling method. The product to be processed on the loading mechanism is transferred to the fixture and fixed by the gripping mechanism, and then CNC machining is performed. After the machining is completed, the fixture is released and the gripping mechanism transfers it back to the loading mechanism. This greatly improves the material handling efficiency, eliminates the randomness caused by manual material handling, reduces the labor intensity of workers, and improves the overall production efficiency and yield of products.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A CNC machine (10) for a mobile phone metal middle frame, characterized in that, The device comprises a pedestal (100), a workbench (300) arranged on the upper surface of the pedestal (100) and movable in the upper surface of the pedestal (100), a CNC main shaft (200) fixed on the upper surface of the pedestal (100) and located beside the workbench (300), a loading mechanism (500), a grabbing mechanism (400), a tool magazine turntable (700) located beside the grabbing mechanism (400), a clamp (600) arranged on the workbench (300) and located below the tool magazine turntable (700), and a main controller, wherein the CNC main shaft (200) has a lifting part (210) movable in the vertical direction, and the grabbing mechanism (400) and the tool magazine turntable (700) are suspended above the workbench (300) and are fixedly connected with the lifting part (210). The loading mechanism (500) is arranged beside the clamp (600) and corresponds to the grabbing mechanism (400), and the loading mechanism (500) comprises at least one placement plate (510) arranged on the upper surface of the workbench (300), wherein the placement plate (510) is provided with at least one support (560) for containing a product to be processed. The grabbing mechanism (400) comprises a mounting bracket (410) fixedly connected to the lifting part (210), an XYZ three-axis moving mechanism (420) arranged on the mounting bracket (410), and a vacuum nozzle (430) fixedly connected to the movable end of the XYZ three-axis moving mechanism (420), wherein the vacuum nozzle (430) is in communication with an external vacuum device and is used for sucking the product to be processed. The clamp (600) comprises a processing plate (610) fixed on the upper surface of the workbench (300) and provided with a product mounting groove, and a cover plate (620) movably arranged at the opening of the product mounting groove, wherein a rotary pressing claw (630) is arranged on the processing plate and used for pressing or releasing the cover plate (620). The tool magazine turntable (700) is provided with a magnetic head (710) for sucking the cover plate (620) to open the product mounting groove and a plurality of tools for processing the product. The main controller is electrically connected with the CNC main shaft (200), the workbench (300), the XYZ three-axis moving mechanism (420), the tool magazine turntable (700), and an external vacuum device, respectively.

2. The CNC machine (10) of claim 1, wherein, The grabbing mechanism (400) further comprises a first telescopic driving member (440) fixed on the mounting bracket (410) and two hooks (450) fixed on the telescopic end of the first telescopic driving member (440) and used for hooking the support (560), wherein the first telescopic driving member (440) drives the two hooks (450) to lift to hook the support (560), and the first telescopic driving member (440) is electrically connected with the main controller.

3. The CNC machine (10) of claim 2, wherein, The bottom of the hook (450) is provided with a hook portion, the hook (450) further comprises a second telescopic driving element (451) above the hook portion and a fixed plate (452) fixedly connected with the telescopic end of the second telescopic driving element (451), the second telescopic driving element (451) drives the fixed plate (452) to ascend and descend, so that the fixed plate (452) is close to or away from the hook portion to clamp the support (560), and the second telescopic driving element (451) is electrically connected with the main controller.

4. The CNC machine (10) of claim 1, wherein, The support (560) comprises a support mother frame (561) and a plurality of support child frames (562) arranged at intervals and detachably mounted on the support mother frame (561), the support child frame (562) is provided with a product mounting position with a shape adapted to the product to be processed, and the upper surface of the support mother frame (561) is provided with a plurality of protrusions, and the lower surface of the support mother frame (561) is provided with a plurality of grooves corresponding to the protrusions.

5. The CNC machine (10) of claim 4, characterized in that, The support child frame (562) is provided with a plurality of buckle connecting elements, and the support mother frame (561) is provided with a plurality of buckle ports corresponding to the buckle connecting elements.

6. The CNC machine (10) of claim 1, wherein, The loading mechanism (500) further comprises at least one bottom plate (530) fixedly connected to the workbench (300), a guide column (520) fixedly connected to the bottom plate (530) in the vertical direction and penetrating the placement plate (510), a third telescopic driving element (540) fixed to the bottom plate (530), and a top rod (550) hingedly connected to the telescopic end of the third telescopic driving element (540) and the placement plate (510) respectively, the top rod (550) swings to drive the placement plate (510) to ascend and descend along the guide column (520) when the telescopic end of the third telescopic driving element (540) acts, and the third telescopic driving element (540) is electrically connected with the main controller.

7. The CNC machine (10) of claim 6, characterized in that The placement plate (510) is provided with a first positioning pin (511) for positioning the support (560), and the support (560) is provided with a through hole corresponding to the first positioning pin (511).

8. The CNC machine (10) of claim 1, wherein, The secondary positioning jig (800) further comprises a photoelectric sensor (830) arranged on the support plate (810) and used for detecting the product loading condition, and the photoelectric sensor (830) is electrically connected with the main controller.

9. The CNC machine (10) of claim 8, characterized in that, The tool magazine turntable (700) further comprises a probe for detecting the height of the support (560) on the loading mechanism (500), and the probe is electrically connected with the main controller.

10. The CNC machine (10) of claim 1, wherein, The tool magazine turntable (700) further comprises a probe for detecting the height of the support (560) on the loading mechanism (500), and the probe is electrically connected with the main controller.

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