Slot milling machine with three milling heads

Abstract

The utility model relates to a slot milling machine with three milling heads. A table; the clamping fixture is used for clamping a workpiece to be machined; a machine tool frame body; and the main shaft lifting driving device is installed on the machine tool frame body, a first groove milling main shaft, a second groove milling main shaft and a third groove milling main shaft are arranged on the main shaft lifting driving device, and the working table drives a workpiece to be machined on the clamping fixture to achieve three-time machining at the positions of the first groove milling main shaft, the second groove milling main shaft and the third groove milling main shaft. According to the three-milling-head slot milling machine, workpieces can be automatically conveyed to the first slot milling main shaft, the second slot milling main shaft and the third slot milling main shaft through the arranged working table, machining of three positions is continuously achieved through one-time clamping, the working efficiency and the qualified rate are greatly improved, the whole set of structural design and the reasonable layout mode are adopted, and the machining efficiency is greatly improved. Manual participation links are reduced, so that the processing safety is very high, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of slot milling machine technology, and in particular to a three-head slot milling machine. Background Technology

[0002] Milling machines are mainly used for secondary processing after automatic lathes. They can be modified to perform processes such as milling flat grooves, and can also be equipped with drilling, tapping, chamfering and other processes. They are also called composite machines or special machine tools. They can also be used for milling grooves in various metal materials, plastic materials and other non-standard metal materials. They are the main machinery used for processing solid wood furniture, mahogany classical furniture and other products.

[0003] Currently, the equipment used for grooving is a single-head grooving machine. The following defects have been found in the use of this single-head equipment:

[0004] 1) When multiple slots need to be milled simultaneously, repeated positioning is required, which causes the positioning error to accumulate and affects the machining accuracy;

[0005] 2) The existing milling cutter of the slotting machine has only one working head. If it is necessary to change the processing type or parameters, replace the tool and add a positioning fixture, the slotting machine needs to be stopped or the operation stopped, which wastes a lot of time and further reduces the processing efficiency. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problem that in the prior art, single-head milling equipment limits the processing efficiency of the milling machine when mass-producing parts, occupies a long processing time, cannot meet production needs, and increases the processing cost of the product.

[0007] To solve the above-mentioned technical problems, this utility model provides a three-head milling machine, comprising: a bed; a worktable disposed on the bed; a clamping fixture disposed on the worktable for clamping the workpiece to be processed; a machine tool frame fixedly mounted on the bed; and a spindle lifting drive device mounted on the machine tool frame, wherein the spindle lifting drive device is provided with a first milling spindle, a second milling spindle, and a third milling spindle, and the worktable drives the workpiece to be processed on the clamping fixture to pass through the third milling spindle, the first milling spindle, and the second milling spindle to achieve three-stage processing.

[0008] In one embodiment of the present invention, the milling machine further includes a loading and unloading device, which includes a loading mechanism, a picking robot, and a receiving mechanism. The loading mechanism contains a plurality of workpieces to be processed. The picking robot is used to transfer workpieces between the loading mechanism, the clamping fixture, and the receiving mechanism. The receiving mechanism is used to place the processed workpieces.

[0009] In one embodiment of this utility model, the worktable includes an X-axis moving mechanism and a Y-axis moving mechanism, which together constitute an XY dual-axis motion system. The Y-axis moving mechanism is mounted on the X-axis moving mechanism, and the clamping fixture is mounted on the Y-axis moving mechanism.

[0010] In one embodiment of this utility model, the clamping fixture includes a clamping base, a first clamping power source, a limiting plate, a first top plate, a positioning block, a second clamping power source, and a second top plate. The first clamping power source and the second clamping power source are both mounted on the clamping base. One end of the first top plate is hinged to the output end of the first clamping power source. The second top plate is connected to the output end of the second clamping power source. The positioning block is fixedly mounted on the upper surface of the clamping base. The limiting plate is mounted on the clamping base and is used to limit the first top plate within the clamping base.

[0011] In one embodiment of this utility model, the spindle lifting drive device includes a lifting drive motor, a lifting lead screw, and a lifting slide plate. The lifting drive motor is mounted on the machine tool frame, and the output end of the lifting drive motor is connected to the lifting lead screw. The lifting slide plate is connected to the nut pair of the lifting lead screw, and the lifting slide plate is slidably connected to the machine tool frame. The first milling spindle, the second milling spindle, and the third milling spindle are mounted on the lifting slide plate.

[0012] In one embodiment of this utility model, the feeding mechanism includes a feeding support base, two parallel feeding guide plates, a feeding drive cylinder, a feeding push plate, a hopper bottom plate, and several hopper limiting plates. The feeding drive cylinder is mounted on the feeding support base. The two parallel feeding guide plates are mounted on the upper surface of the feeding support base, and the two parallel feeding guide plates form a moving channel for the workpiece to be processed. The feeding push plate is connected to the output end of the feeding drive cylinder. The hopper bottom plate is mounted on the feeding support base, and the hopper bottom plate is provided with a discharge through hole at a position suspended between the two parallel feeding guide plates. The discharge through hole connects to the moving channel of the workpiece to be processed. The lower ends of the several hopper limiting plates are fixed to the hopper bottom plate, and the several hopper limiting plates together form a hopper that limits the workpiece to be processed.

[0013] In one embodiment of this utility model, the material handling robot includes a robot mounting frame, a two-axis motion truss, a connecting frame, a position adjustment cylinder, a gripper cylinder, and a suction nozzle. The robot mounting frame is mounted on a bed, the two-axis motion truss is disposed on the robot mounting frame, the connecting frame is connected to the two-axis motion truss, the position adjustment cylinder is mounted on the connecting frame, the gripper cylinder is connected to the output end of the position adjustment cylinder, and the suction nozzle is mounted on the connecting frame. Both the gripper cylinder and the suction nozzle are used to grip the workpiece.

[0014] In one embodiment of the present invention, the receiving mechanism includes a receiving drive device, a receiving support plate, and a plurality of receiving limit rods. The receiving support plate and the receiving drive device are connected, and the plurality of receiving limit rods form a material bin for receiving workpieces.

[0015] In one embodiment of this utility model, the take-up drive device includes a take-up drive motor, a take-up drive wheel, a gear belt, a take-up driven wheel, a take-up lifting module, and a module mounting base. The take-up drive motor and the module mounting base are both mounted on the bed. The take-up drive wheel is connected to the output end of the take-up drive motor. The take-up driven wheel is connected to the take-up drive wheel via the gear belt. The take-up driven wheel is connected to the lower end of the take-up lifting module. The take-up lifting module is disposed on the module mounting base. The take-up support plate is connected to the nut pair of the take-up lifting module.

[0016] In one embodiment of the present invention, the material receiving mechanism further includes a fixed base plate and a flipping plate. The fixed base plate is installed on the bed, one side of the flipping plate is hinged to the fixed base plate, and a plurality of material receiving limit rods are installed on the flipping plate.

[0017] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0018] The three-head milling machine of this utility model can automatically transport the workpiece to the first, second and third milling spindles through the set worktable, and complete the processing of three positions in one clamping, which greatly improves the work efficiency and pass rate. The complete structural design and reasonable layout reduce the manual intervention links, making the processing very safe and reducing the production cost. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of the three-head milling machine in a preferred embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the three-head milling machine in a preferred embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the clamping fixture in a preferred embodiment of the present invention;

[0023] Figure 4This is a schematic diagram of the spindle lifting drive device in a preferred embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the feeding mechanism in a preferred embodiment of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the feeding mechanism in a preferred embodiment of the present invention. Figure 2 ;

[0026] Figure 7 This is a schematic diagram of the feeding mechanism in a preferred embodiment of the present invention. Figure 3 ;

[0027] Figure 8 This is a schematic diagram of the material handling robot in a preferred embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the receiving mechanism in a preferred embodiment of the present invention.

[0029] Explanation of reference numerals in the accompanying drawings: Bed 1, Worktable 2, X-axis moving mechanism 21, Y-axis moving mechanism 22, Clamping fixture 3, Clamping base 31, First clamping power source 32, Limiting plate 33, First top plate 34, Positioning block 35, Second clamping power source 36, Second top plate 37, Machine tool frame 4, Spindle lifting drive device 5, Lifting drive motor 51, Lifting lead screw 52, ​​Lifting slide plate 53, First milling spindle 6, Second milling spindle 7, Third milling spindle 8, Loading / unloading device 9, Loading mechanism 91, Loading support seat 911, Loading guide plate 912, Loading drive cylinder 913, Loading pusher Plate 914, hopper bottom plate 915, hopper limit plate 916, unloading through hole 917, loading baffle 918, material handling robot 92, robot mounting frame 921, two-axis motion truss 922, connecting frame 923, position adjustment cylinder 924, gripper cylinder 925, suction nozzle 926, material receiving mechanism 93, material receiving drive device 931, material receiving drive motor 9311, material receiving drive wheel 9312, gear belt, material receiving driven wheel 9313, material receiving lifting module 9314, module mounting base 9315, material receiving support plate 932, material receiving limit rod 933, fixed base plate 934, flipping plate 935. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example

[0031] Reference Figure 1 , 2As shown, the three-head milling machine of this utility model includes: a bed 1; a worktable 2, which is mounted on the bed 1; a clamping fixture 3, which is mounted on the worktable 2 and is used to clamp the workpiece to be processed; a machine tool frame 4, which is fixedly mounted on the bed 1; and a spindle lifting drive device 5, which is mounted on the machine tool frame 4. The spindle lifting drive device 5 is equipped with a first milling spindle 6, a second milling spindle 7, and a third milling spindle 8. The worktable 2 drives the workpiece to be processed on the clamping fixture 3 to pass through the third milling spindle 8, the first milling spindle 6, and the second milling spindle 7 to achieve three-stage processing. The tool spindle directions of the first milling spindle 6 and the second milling spindle 7 are both arranged in the vertical direction, while the tool spindle of the third milling spindle 8 is arranged in the horizontal direction.

[0032] Reference Figure 2 As shown, the worktable 2 includes an X-axis moving mechanism 21 and a Y-axis moving mechanism 22, which constitute an XY dual-axis motion system. The Y-axis moving mechanism 22 is mounted on the X-axis moving mechanism 21, and the clamping fixture 3 is mounted on the Y-axis moving mechanism 22. Both the X-axis moving mechanism 21 and the Y-axis moving mechanism 22 are linear moving mechanisms. They can be structured with a linear module driving the moving plate to achieve linear movement; or they can be a combination of a motor and a lead screw, whereby the motor drives the lead screw to rotate, thereby causing the moving plate connected to the lead screw to move linearly. Through linear movement in two directions, the workpiece to be processed, clamped on the clamping fixture 3, can move within a plane, thereby adjusting to different processing positions of the first milling spindle 6, the second milling spindle 7, and the third milling spindle 8 to achieve processing. At the same time, the spindle lifting drive device 5 drives the first milling spindle 6, the second milling spindle 7, and the third milling spindle 8 to adjust the vertical distance between them and the workpiece to be processed.

[0033] Reference Figure 3As shown, the clamping fixture 3 includes a clamping base 31, a first clamping power source 32, a limiting plate 33, a first top plate 34, a positioning block 35, a second clamping power source 36, and a second top plate 37. Both the first clamping power source 32 and the second clamping power source 36 are mounted on the clamping base 31. One end of the first top plate 34 is hinged to the output end of the first clamping power source 32. The second top plate 37 is connected to the output end of the second clamping power source 36. The positioning block 35 is fixedly mounted on the upper surface of the clamping base 31. The limiting plate 33 is mounted on the clamping base 31 and is used to limit the first top plate 34 within the clamping base 31. Preferably, both the first clamping power source 32 and the second clamping power source 36 are cylinders. The clamping base 31 has a rectangular groove. The first top plate 34 is a rectangular flat plate and is placed inside the rectangular groove. The limiting plate 33 is locked to the protrusions on both sides of the rectangular groove by fasteners. Therefore, the limiting plate 33 forms a rectangular cross-section channel in the rectangular groove. The first clamping power source 32 drives the first top plate 34 to move within the rectangular cross-section channel, thereby ensuring that the first top plate 34 moves stably along a straight line and presses the workpiece to be processed against one side of the positioning block 35. A tail end limiting block is installed on the positioning block 35. The second clamping power source 36 drives the second top plate 37 to move, pressing the workpiece to be processed against the tail end limiting block. The first top plate 34 and the second top plate 37 press the workpiece to be processed against the positioning block 35 in two mutually perpendicular directions, thereby stably fixing the workpiece to be processed for subsequent processing.

[0034] Reference Figure 4 As shown, the spindle lifting drive device 5 includes a lifting drive motor 51, a lifting lead screw 52, ​​and a lifting slide plate 53. The lifting drive motor 51 is mounted on the machine tool frame 4, and its output end is connected to the lifting lead screw 52. The lifting slide plate 53 is connected to the nut pair of the lifting lead screw 52 and is slidably connected to the machine tool frame 4. The first milling spindle 6, the second milling spindle 7, and the third milling spindle 8 are mounted on the lifting slide plate 53. The lifting slide plate 53 is assembled from two slide plates into a right-angle plate shape. The first milling spindle 6 and the second milling spindle 7 are located on one surface of the lifting slide plate 53, and the third milling spindle 8 is located on the other surface of the lifting slide plate 53. Example

[0035] Reference Figure 1As shown, the milling machine also includes a loading and unloading device 9, which includes a loading mechanism 91, a picking robot 92, and a receiving mechanism 93. The loading mechanism 91 contains several workpieces to be processed. The picking robot 92 is used to transfer workpieces between the loading mechanism 91, the clamping fixture 3, and the receiving mechanism 93. The receiving mechanism 93 is used to place the processed workpieces. According to the work cycle, the picking robot 92 first picks up a workpiece to be processed from the loading mechanism 91, then moves to the clamping fixture 3, removes the processed workpiece from the clamping fixture 3, and then places the workpiece to be processed into the clamping fixture 3. Finally, the picking robot 92 moves to the receiving mechanism 93 and places the processed workpiece into the receiving mechanism 93, and this cycle continues. A stack of workpieces to be processed is placed in the feeding mechanism 91 for the picking robot 92 to grab and process. The processed workpieces are then placed into the receiving mechanism 93 by the picking robot 92. In the receiving mechanism 93, the processed workpieces are placed into the hopper one by one from top to bottom in a stack.

[0036] Reference Figure 5-7As shown, the feeding mechanism 91 includes a feeding support base 911, two parallel feeding guide plates 912, a feeding drive cylinder 913, a feeding push plate 914, a hopper bottom plate 915, and several hopper limiting plates 916. The feeding drive cylinder 913 is mounted on the feeding support base 911, and the two parallel feeding guide plates 912 are mounted on the upper surface of the feeding support base 911. The two parallel feeding guide plates 912 form a moving channel for the workpiece to be processed. The output ends of the feeding push plate 914 and the feeding drive cylinder 913 are connected. The bottom plate 915 of the hopper is installed on the feeding support 911. The bottom plate 915 of the hopper is suspended between two parallel feeding guide plates 912 and has a discharge through hole 917. The discharge through hole 917 connects to the moving channel of the workpiece to be processed. The lower ends of the plurality of hopper limiting plates 916 are fixed on the bottom plate 915 of the hopper, and the plurality of hopper limiting plates 916 enclose a hopper that limits the workpiece to be processed. Several hopper limiting plates 916 are arranged around the discharge through hole 917. The cross-section of the space enclosed by the several hopper limiting plates 916 is similar to that of the workpiece to be processed. A stack of workpieces to be processed is placed within the area enclosed by the several hopper limiting plates 916. In this way, the bottom of the stack of workpieces to be processed falls into the moving channel of the workpiece to be processed through the discharge through hole 917. The bottom plate 915 of the hopper limits the height of the moving channel, so that only one workpiece to be processed can enter the moving channel at a time. The loading drive cylinder 913 drives the loading push plate 914 to move, pushing the loading push plate 914 to move towards the discharge end of the moving channel. The discharge end of the moving channel is provided with a loading baffle 918. When the loading drive cylinder 913 drives the loading push plate 914 to push the workpiece to be processed in the moving channel to contact the loading baffle 918, the workpiece to be processed is loaded into place. The workpiece to be processed waits at this position for the picking robot 92 to pick up the workpiece to be processed. The feeding push plate 914 is a long rectangular plate, and it is located between two parallel feeding guide plates 912. When the feeding drive cylinder 913 drives the feeding push plate 914 to push the workpiece to be processed in the moving channel, the upper end face of the feeding push plate 914 simultaneously blocks the unloading through hole 917 to prevent the workpiece to be processed from falling into the unloading through hole 917. After the feeding drive cylinder 913 drives the feeding push plate 914 to retract and return to the initial position, the feeding push plate 914 avoids the unloading through hole 917, allowing the workpiece to be processed at the bottom of the several hopper limit plates 916 to fall.

[0037] Reference Figure 8As shown, the material handling robot 92 includes a robot mounting frame 921, a two-axis motion truss 922, a connecting frame 923, a position adjustment cylinder 924, a gripper cylinder 925, and a suction nozzle 926. The robot mounting frame 921 is mounted on the bed 1. The two-axis motion truss 922 is mounted on the robot mounting frame 921. The connecting frame 923 is connected to the two-axis motion truss 922. The position adjustment cylinder 924 is mounted on the connecting frame 923. The gripper cylinder 925 is connected to the output end of the position adjustment cylinder 924. The suction nozzle 926 is mounted on the connecting frame 923. Both the gripper cylinder 925 and the suction nozzle 926 are used to grip workpieces. The two-axis motion gantry 922 is a motion system that moves along two X and Z axes. The two-axis motion gantry 922 enables the movement of the gripper cylinder 925 and the suction nozzle 926 within a spatial range. The gripper cylinder 925 and the suction nozzle 926 are independent gripping parts. The two grippers connected to the gripper cylinder 925 are used to support the inner wall of the workpiece to grip it. The suction nozzle 926 directly uses negative pressure adsorption.

[0038] Reference Figure 9 As shown, the receiving mechanism 93 includes a receiving drive device 931, a receiving support plate 932, and a plurality of receiving limit rods 933. The receiving support plate 932 and the receiving drive device 931 are connected, and the plurality of receiving limit rods 933 form a workpiece receiving bin. A column 11 is installed on the bed 1. A full-load sensor 12 is provided at the upper end of the column 11, and a position sensor 13 is provided at the lower end of the receiving drive device 931. The full-load sensor 12 is flush with the upper end of the receiving limit rods 933, and the full-load sensor 12 is used to sense that the workpieces in the plurality of receiving limit rods 933 are full. The position sensor 13 is used to sense that the receiving support plate 932 has moved down into position. The receiving support plate 932 is inserted between the plurality of receiving limit rods 933, so that when the picking robot 92 places the workpiece on the receiving support plate 932, the workpiece is confined between the plurality of receiving limit rods 933.

[0039] In the above structure, the take-up drive device 931 includes a take-up drive motor 9311, a take-up drive wheel 9312, a gear belt, a take-up driven wheel 9313, a take-up lifting module 9314, and a module mounting base 9315. The take-up drive motor 9311 and the module mounting base 9315 are both mounted on the bed 1. The take-up drive wheel 9312 is connected to the output end of the take-up drive motor 9311. The take-up driven wheel 9313 is connected to the take-up drive wheel 9312 via the gear belt. The take-up driven wheel 9313 is connected to the lower end of the take-up lifting module 9314. The take-up lifting module 9314 is mounted on the module mounting base 9315. The take-up support plate 932 is connected to the nut assembly of the take-up lifting module 9314. The positioning sensor 13 is installed at the lower end of the module mounting base 9315.

[0040] Initially, after the picking robot 92 places the workpiece on the receiving support plate 932, the receiving drive motor 9311 drives the receiving lifting module 9314 to rotate through the transmission of the receiving drive wheel 9312, gear belt and receiving driven wheel 9313, thereby causing the receiving support plate 932 to move down by the thickness of one workpiece. This cycle continues, and the receiving support plate 932 gradually moves down until it reaches the bottom.

[0041] In the above structure, the receiving mechanism 93 further includes a fixed base plate 934 and a flipping plate 935. The fixed base plate 934 is mounted on the bed 1, and one side of the flipping plate 935 is hinged to the fixed base plate 934. A plurality of receiving limit rods 933 are mounted on the flipping plate 935. The fixed base plate 934 and the flipping plate 935 constitute a door panel and door frame structure, with the flipping plate 935 allowing the door to rotate around the fixed base plate 934. When receiving materials, the hopper formed by the plurality of receiving limit rods 933 is in a vertical position. When the hopper is full of workpieces, the flipping plate 935 is rotated 90°, at which point the hopper is placed horizontally, facilitating the removal of all workpieces from the hopper.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A three-head slotting machine, characterized in that, include: Bed frame; The workbench is set on the bed frame; A clamping fixture is set on the worktable and is used to clamp the workpiece to be processed. The machine tool frame is fixedly mounted on the bed; A spindle lifting drive device is installed on the machine tool frame. The spindle lifting drive device is equipped with a first milling spindle, a second milling spindle and a third milling spindle. The workpiece to be processed on the worktable driving clamping fixture passes through the third milling spindle, the first milling spindle and the second milling spindle to achieve three processing steps.

2. The three-head milling machine for slotting according to claim 1, characterized in that: The milling machine also includes a loading and unloading device, which includes a loading mechanism, a picking robot, and a receiving mechanism. The loading mechanism contains several workpieces to be processed. The picking robot is used to transfer workpieces between the loading mechanism, the clamping fixture, and the receiving mechanism. The receiving mechanism is used to place the processed workpieces.

3. The three-head milling machine for slotting according to claim 1, characterized in that: The worktable includes an X-axis moving mechanism and a Y-axis moving mechanism, which together form an XY dual-axis motion system. The Y-axis moving mechanism is mounted on the X-axis moving mechanism, and the clamping fixture is mounted on the Y-axis moving mechanism.

4. The three-head milling machine for slotting according to claim 1, characterized in that: The clamping fixture includes a clamping base, a first clamping power source, a limiting plate, a first top plate, a positioning block, a second clamping power source, and a second top plate. The first clamping power source and the second clamping power source are both mounted on the clamping base. One end of the first top plate is hinged to the output end of the first clamping power source. The second top plate is connected to the output end of the second clamping power source. The positioning block is fixedly mounted on the upper surface of the clamping base. The limiting plate is mounted on the clamping base and is used to limit the first top plate within the clamping base.

5. The three-head milling machine for slotting according to claim 1, characterized in that: The spindle lifting drive device includes a lifting drive motor, a lifting lead screw, and a lifting slide plate. The lifting drive motor is mounted on the machine tool frame, and the output end of the lifting drive motor is connected to the lifting lead screw. The lifting slide plate is connected to the nut pair of the lifting lead screw, and the lifting slide plate is slidably connected to the machine tool frame. The first milling spindle, the second milling spindle, and the third milling spindle are mounted on the lifting slide plate.

6. The three-head milling machine for slotting according to claim 2, characterized in that: The feeding mechanism includes a feeding support base, two parallel feeding guide plates, a feeding drive cylinder, a feeding push plate, a hopper bottom plate, and several hopper limiting plates. The feeding drive cylinder is mounted on the feeding support base. The two parallel feeding guide plates are mounted on the upper surface of the feeding support base, and the two parallel feeding guide plates form a moving channel for the workpiece to be processed. The feeding push plate is connected to the output end of the feeding drive cylinder. The hopper bottom plate is mounted on the feeding support base, and the hopper bottom plate is provided with a discharge through hole at a position suspended between the two parallel feeding guide plates. The discharge through hole connects to the moving channel of the workpiece to be processed. The lower ends of the several hopper limiting plates are fixed to the hopper bottom plate, and the several hopper limiting plates together form a hopper that limits the workpiece to be processed.

7. The three-head milling machine for slotting according to claim 2, characterized in that: The material handling robot includes a robot mounting frame, a two-axis motion truss, a connecting frame, a position adjustment cylinder, a gripper cylinder, and a suction nozzle. The robot mounting frame is mounted on the bed, the two-axis motion truss is mounted on the robot mounting frame, the connecting frame is connected to the two-axis motion truss, the position adjustment cylinder is mounted on the connecting frame, the gripper cylinder is connected to the output end of the position adjustment cylinder, and the suction nozzle is mounted on the connecting frame. Both the gripper cylinder and the suction nozzle are used to grip the workpiece.

8. The three-head milling machine for slotting according to claim 2, characterized in that: The receiving mechanism includes a receiving drive device, a receiving support plate, and several receiving limit rods. The receiving support plate and the receiving drive device are connected, and the several receiving limit rods form a material bin for receiving workpieces.

9. The three-head milling machine for slotting according to claim 8, characterized in that: The material receiving drive device includes a material receiving drive motor, a material receiving drive wheel, a gear belt, a material receiving driven wheel, a material receiving lifting module, and a module mounting base. The material receiving drive motor and the module mounting base are both mounted on the bed. The material receiving drive wheel is connected to the output end of the material receiving drive motor. The material receiving driven wheel is connected to the material receiving drive wheel via a gear belt. The material receiving driven wheel is connected to the lower end of the material receiving lifting module. The material receiving lifting module is mounted on the module mounting base. The material receiving support plate is connected to the nut pair of the material receiving lifting module.

10. The three-head milling machine for slotting according to claim 9, characterized in that: The material receiving mechanism also includes a fixed base plate and a tilting plate. The fixed base plate is installed on the bed, and one side of the tilting plate is hinged to the fixed base plate. A plurality of material receiving limit rods are installed on the tilting plate.

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