Milling machine tool and milling method for automobile plastic part production

Abstract

The invention relates to the technical field of milling machine tools, and discloses a milling machine tool and a milling method for producing automobile plastic parts, the milling machine tool comprises a machine tool main body, a vertical sliding table, a material table and a clamp are mounted on the machine tool main body, a vertical sliding seat is arranged on the vertical sliding table, a milling head is mounted on the vertical sliding seat, and a milling head is mounted on the material table. And a movable plate capable of vertically moving is mounted at the bottom end of the vertical sliding seat. By arranging the suction cup capable of extending into the plastic workpiece, the suction cup can support the bottom of a milling point on the plastic workpiece and just adsorb and fix waste materials of the milling point, and after machining is finished, the suction cup is driven by the driving assembly to swing, so that the waste materials fall off; by means of the mode, on one hand, deformation caused by pressure during milling can be avoided, on the other hand, waste can be prevented from splashing after being broken in advance, then the phenomenon that the milling edge is damaged or the phenomenon that the waste disturbs follow-up milling work is reduced, and the milling quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of milling machine tools, in particular to a milling machine tool and a milling method for producing automobile plastic parts. Background Art

[0002] CNC milling machine tools are milling machine tools controlled by electronic information. Compared with manual machine tools, they have the characteristics of precise and efficient processing. CNC milling machine tools are mainly used to process metal parts with higher precision requirements and more complex shapes. They are also used to process some plastic parts with such high precision requirements, such as local plastic components in automobiles. However, there are certain differences between the processing of plastic parts and metal processing.

[0003] As the instruction manual Figure 2 A type of plastic shell shown in the figure is prone to some problems when it is necessary to mill holes on the shell surface: first, the material of the plastic shell is softer than that of metal, and it is also subject to downward pressure on the shell processing part during milling, which is easy to cause deformation; second, when milling holes, the rotating milling head generally moves along the outer contour of the hole, but when the hole is about to be formed, the waste in the hole is prone to break and splash in advance. On the one hand, it is easy to cause damage to the edge of the hole when breaking, thereby affecting the hole accuracy; on the other hand, if the splashed waste falls on other positions to be processed on the surface of the workpiece, it will interfere with the subsequent milling process, which needs further improvement. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a milling machine tool and a milling method for the production of automotive plastic parts, which have the advantages of high processing quality and solve the problems of easy deformation of workpieces and premature breakage and ejection of waste materials when processing plastic shell workpieces on existing milling machines.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a milling machine tool, comprising a machine tool body, a vertical slide, a material table and a fixture are installed on the machine tool body, a vertical slide is provided on the vertical slide, a milling head is installed on the vertical slide, a movable plate capable of vertical movement is installed at the bottom end of the vertical slide, a plurality of suction cups vertically upwardly arranged are installed on the movable plate, the suction cups are used to support the cutting part on the workpiece and absorb waste during milling, and a driving component and a negative pressure generating component are also installed on the movable plate; The driving assembly is in driving connection with the suction cup, and the driving assembly is used to drive the multiple suction cups to swing simultaneously; The negative pressure generating component is connected to the suction cup, and the negative pressure generating component is used to make the suction cup generate suction; Before processing, the main body of the machine tool forces the vertical slide to move when it is in operation, so that the suction cup installed at the bottom of the vertical slide extends into the workpiece and fits the bottom of the point to be processed. The negative pressure generating component operates, forcing the suction cup to generate suction and adsorb the bottom of the point to be processed. During processing, the suction cup provides support and fixation for the waste part. After processing, the movable plate moves downward vertically, forcing the suction cup and the waste to move downward, and then the driving component operates, forcing the suction cup to swing, causing the adsorbed waste to fall off.

[0006] Preferably, a base plate is fixed at the bottom end of the vertical slide, a vertical cylinder is fixedly connected to the top of the base plate, an output end of the vertical cylinder extends to the bottom of the base plate and is fixedly connected to the movable plate, a vertical guide rod is also fixed on the movable plate, and the vertical guide rod is movably plugged into the base plate.

[0007] Preferably, the movable plate includes a main plate and a sub-plate with flush heights, the main plate is fixed to the vertical cylinder output shaft, an end edge is provided on the side of the main plate close to the sub-plate, the sub-plate is rotatably connected to the end edge via a horizontal axis, and a plurality of suction cups are installed on the top of the sub-plate.

[0008] Preferably, the driving assembly includes a first motor fixed on the main board, a driving gear is fixed on the output shaft of the first motor, a driven gear is meshed at the bottom of the driving gear, and the driven gear is fixedly sleeved on the horizontal shaft and fits with the end edge.

[0009] Preferably, an air hole is opened on the end edge, and the negative pressure generating component includes an air pump and a vacuum generator fixed on the bottom of the main board. The air supply end of the vacuum generator is connected to the air pump through an input pipe, and the suction end of the vacuum generator is fixedly connected to the end of the air hole. The negative pressure generating component also includes an air suction pipe, one end of the air suction pipe passes through the driven gear and is fixed to the driven gear, one end of the air suction pipe connected to the driven gear matches the position of the air hole, and a plurality of branch pipes are fixed to the other end of the air suction pipe, and the plurality of branch pipes are respectively connected to each suction cup.

[0010] Preferably, the suction cup includes a vertically arranged outer tube, an inner tube is movably inserted into the outer tube, the bottom end of the inner tube is fixed to the end of the branch tube, the top end of the inner tube extends to the outside of the outer tube and is fixed with a rubber end head, a return spring is fixed between the rubber end head and the top end of the outer tube, and the return spring is sleeved on the outside of the inner tube.

[0011] Preferably, the plurality of suction cups are mounted on the sub-plate through an adjusting assembly, and the adjusting assembly is used to drive the plurality of suction cups to move and disperse from each other, the adjusting assembly comprising a cylinder fixedly inserted on the sub-plate, a square groove being provided in the cylinder, a square nut sleeve being provided in the square groove, a bracket being fixed to the bottom end of the cylinder, a second motor being fixed on the bracket, an adjusting screw being fixed on the output shaft of the second motor, the adjusting screw being threadedly connected to the square nut sleeve, a plurality of rod groups being provided on the outer wall of the cylinder, the plurality of rod groups being matched with each suction cup respectively, each of the rod groups comprising two inclined rods distributed up and down and parallel to each other, one end of the inclined rod being hinged to the outer wall of the cylinder, and the other end of the inclined rod being hinged to the outer wall of the outer tube, a plurality of push rods being further provided on the outer wall of the square nut sleeve, one end of the push rod being hinged to the outer wall of the square nut sleeve, and the other end of the push rod being hinged to the upper inclined rod in the rod group.

[0012] Preferably, a mounting frame is fixed on the vertical slide, and two symmetrically distributed longitudinal slides are fixed on the inner side of the mounting frame, and a longitudinal slide is provided on the two longitudinal slides, and a transverse slide is fixed between the two longitudinal slides, and a transverse slide is provided on the transverse slide. A third motor and an extension frame are fixedly connected to the transverse slide, and the output shaft of the third motor passes through the extension frame and is fixed with a first bevel gear. A frame is provided at the end of the extension frame, and a sleeve is fixed on one side of the frame, and the sleeve is sleeved on the outside of the output shaft of the third motor and is rotatably connected to the extension frame. The milling heads are provided with two and are symmetrically distributed, and the milling heads pass through the side wall of the frame and are rotatably connected to the side wall of the frame. A second bevel gear is also fixed on the end of the milling head, and the second bevel gear is meshed with the first bevel gear, and a worm gear is fixed on the outside of the sleeve, and a fourth motor is also fixed on the extension frame, and a worm is fixed on the output shaft of the fourth motor, and the worm is mounted on one side of the extension frame through a bearing seat, and the worm is meshed with the worm gear.

[0013] Preferably, an exhaust pipe is fixed to the exhaust pipe of the vacuum generator, one end of which is fixed to the mounting frame and faces the milling head.

[0014] The invention also discloses a milling method for producing automobile plastic parts. The milling method for producing automobile plastic parts uses the above-mentioned milling machine tool.

[0015] Compared with the prior art, the present invention provides a milling machine tool and a milling method for producing automobile plastic parts, which have the following beneficial effects: 1. This milling machine tool and the milling method for automobile plastic parts production are provided with a suction cup that can extend into the interior of the plastic workpiece. The suction cup can support the bottom of the milling point on the plastic workpiece and just adsorb and fix the waste at the milling point. When the processing is completed, the suction cup is driven to swing by the driving component to make the waste fall. This method can avoid deformation caused by pressure during milling on the one hand, and avoid premature breakage and splashing of waste on the other hand, thereby reducing the phenomenon of milling edge damage or waste interference with subsequent milling work, thereby improving the milling quality.

[0016] 2. This milling machine tool and the milling method for the production of automobile plastic parts, by configuring the suction cup as an outer tube, an inner tube, a rubber end and a return spring, utilizes the elastic force of the return spring to make the rubber end fit more closely to the workpiece, thereby improving the suction and fixing effect of the suction cup on the waste part. In addition, the return spring enables the rubber end and the inner tube to float vertically within a certain range, so that the suction cup can adsorb not only flat surfaces but also curved surfaces. Therefore, it is suitable for milling work on different workpiece surfaces and has higher applicability.

[0017] 3. This milling machine tool and the milling method for the production of automobile plastic parts are provided with an adjustment component. When the milling range becomes larger, the adjustment component can simultaneously drive multiple suction cups to disperse to the surroundings while maintaining verticality after operation, so that the support points are dispersed, the support effect on the milling part is better, and the applicability is higher.

[0018] 4. This milling machine tool and the milling method for the production of automobile plastic parts, by providing two sets of milling heads, can be replaced with the other one when the heat of one of them is higher, thereby avoiding deformation and damage of the plastic workpiece caused by the heat of the milling head and ensuring the cutting quality. In addition, by providing an exhaust pipe, the gas discharged from the vacuum generator can be directed to one of the milling heads, which is beneficial to quickly cool down the milling head and improve the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a milling machine tool of the present invention; Figure 2 It is a structural schematic diagram of a workpiece of the present invention; Figure 3 It is a structural schematic diagram of the vertical slide table of the present invention; Figure 4 It is a structural schematic diagram of the movable plate of the present invention; Figure 5 It is an exploded view of the mounting structure of the sub-board of the present invention; Figure 6 A partial cross-sectional view of the adjustment assembly of the present invention; Figure 7 It is a structural schematic diagram of the mounting frame of the present invention; Figure 8 It is a schematic diagram of the installation structure of the milling head of the present invention; Fig. 9 It is an exploded view of the installation structure of the frame of the present invention.

[0020] In the figure: 1. Machine tool body; 110. Vertical slide; 120. Material table; 130. Fixture; 140. Vertical slide; 2. Milling head; 3. Movable plate; 31. Main plate; 32. Sub-plate; 33. End edge; 34. Horizontal axis; 35. Air hole; 4. Suction cup; 41. Outer tube; 42. Inner tube; 43. Rubber end; 44. Return spring; 5. Driving assembly; 51. First motor; 52. Driving gear; 53. Driven gear; 6. Negative pressure generating assembly; 61. Air pump; 62. Vacuum generator; 63. Suction pipe; 64. Branch pipe; 65. Input pipe; 7. Base plate ;8. Vertical cylinder;9. Vertical guide rod;10. Adjustment assembly;101. Cylinder;102. Square nut sleeve;103. Bracket;104. Second motor;105. Adjustment screw;106. Bevel rod;107. Push rod;11. Mounting frame;12. Longitudinal slide;13. Longitudinal slide seat;14. Transverse slide;15. Transverse slide seat;16. Third motor;17. Extension frame;18. First bevel gear;19. Frame;20. Sleeve;21. Second bevel gear;22. Worm gear;23. Fourth motor;24. Worm;25. Bearing seat;26. Exhaust pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a milling machine tool and a milling method for the production of automobile plastic parts.

[0023] Example 1: Please refer to Figure 1-Figure 3 A milling machine tool comprises a machine tool body 1, on which a vertical slide 110, a material table 120 and a fixture 130 are installed, on which a vertical slide 140 is arranged, on which a milling head 2 is installed, and at the bottom of which a movable plate 3 capable of vertical movement is installed, on which a plurality of suction cups 4 arranged vertically upward are installed, and which are used to support a cutting part on a workpiece and absorb waste during milling processing, and on which a driving component 5 and a negative pressure generating component 6 are also installed; The driving assembly 5 is in transmission connection with the suction cup 4, and the driving assembly 5 is used to drive the multiple suction cups 4 to swing simultaneously; The negative pressure generating component 6 is connected to the suction cup 4, and the negative pressure generating component 6 is used to make the suction cup 4 generate suction; Before processing, the machine tool body 1 forces the vertical slide 110 to move during operation, thereby causing the suction cup 4 installed at the bottom of the vertical slide 110 to extend into the workpiece and fit the bottom of the point to be processed. The negative pressure generating component 6 operates, forcing the suction cup 4 to generate suction to adsorb the bottom of the point to be processed. During processing, the suction cup 4 provides support and fixation for the waste part. After processing, the movable plate 3 moves downward vertically, forcing the suction cup 4 and the waste to move downward, and then the driving component 5 operates, forcing the suction cup 4 to swing, causing the adsorbed waste to fall off.

[0024] The clamp 130 is provided in multiple pieces and is installed on the material table 120. The clamp 130 is used to fix the workpiece. In this embodiment, the number of the suction cups 4 is set to 4, and the 4 suction cups 4 are flush with each other. When in use, the workpiece is first fixed by the clamp 130 before processing, and then the machine tool body 1 is started to force the suction cup 4 at the bottom end of the vertical slide 110 to extend into the workpiece and fit the bottom of the point to be processed, and then the negative pressure generating component 6 is started. When the negative pressure generating component 6 is used, the suction cup 4 generates suction to adsorb the bottom of the point to be processed. During processing, the milling head 2 processes the surface of the workpiece, and the suction cup 4 provides support and fixation for the waste part during processing, thereby preventing the workpiece from deforming during processing, and the fixing effect of the suction cup 4 on the position of the waste can prevent the waste from breaking and splashing in advance. When the processing is completed, the waste is adsorbed on the suction cup 4. At this time, the movable plate 3 moves vertically downward after operation, so that the suction cup 4 and the waste move downward, and then the driving component 5 is started. The driving component 5 forces the suction cup 4 to swing, causing the waste to fall, and then the suction cup 4 is reset to support and adsorb the next processing point; By setting a suction cup 4 that can extend into the interior of the plastic workpiece, the suction cup 4 can support the bottom of the milling point on the plastic workpiece and just adsorb and fix the waste at the milling point. When the processing is completed, the suction cup 4 is driven to swing by the driving component 5 to make the waste fall. This method can avoid deformation caused by pressure during milling on the one hand, and avoid splashing of waste after premature breakage on the other hand, thereby reducing the damage to the milling edge or the phenomenon that waste interferes with subsequent milling work, thereby improving the milling quality.

[0025] Example 2: See Figure 4 and Figure 5 , which is different from the above-mentioned embodiment, a base plate 7 is fixed to the bottom end of the vertical slide 110, a vertical cylinder 8 is fixedly connected to the top of the base plate 7, an output end of the vertical cylinder 8 extends to the bottom of the base plate 7 and is fixedly connected to the movable plate 3, a vertical guide rod 9 is also fixed on the movable plate 3, and the vertical guide rod 9 is movably plugged into the base plate 7.

[0026] Among them, two vertical guide rods 9 are provided, and a linear bearing matching the vertical guide rods 9 is provided on the base plate 7. When in use, the vertical cylinder 8 is extended and retracted to drive the movable plate 3 to move vertically, thereby driving the movable plate 3 to move vertically, which is conducive to driving the suction cup 4 to move vertically; Example 3, see Figure 4 , different from the above embodiment, the movable plate 3 includes a main plate 31 and a sub-plate 32 with the same height, the main plate 31 is fixed to the output shaft of the vertical cylinder 8, the main plate 31 is provided with an end edge 33 on the side close to the sub-plate 32, the sub-plate 32 is rotatably connected to the end edge 33 through a horizontal shaft 34, and a plurality of suction cups 4 are mounted on the top of the sub-plate 32, the driving assembly 5 includes a first motor 51 fixed to the main plate 31, a driving gear 52 is fixed to the output shaft of the first motor 51, a driven gear 53 is meshed at the bottom of the driving gear 52, and the driven gear 53 is fixedly sleeved on the horizontal shaft 34 and fits with the end edge 33.

[0027] In the initial state, the main board 31 and the auxiliary board 32 are both horizontal. When in use, the first motor 51 is started, and the first motor 51 drives the driving gear 52 to rotate when it is running, and the driving gear 52 drives the driven gear 53 to rotate when it rotates, and the driven gear 53 drives the horizontal shaft 34 to rotate when it rotates, and the horizontal shaft 34 drives the auxiliary board 32 to rotate when it rotates, thereby driving the suction cup 4 on the auxiliary board 32 to swing, so that the waste adsorbed on the suction cup 4 is tilted; By providing the first motor 51 , it is helpful to drive the auxiliary plate 32 on the movable plate 3 to rotate, thereby driving the suction cup 4 to swing, which is helpful to make the waste material adsorbed on the top of the suction cup 4 fall off.

[0028] Example 4, see Figure 4 and Figure 5 , which is different from the above embodiment, an air hole 35 is opened on the end edge 33, and the negative pressure generating component 6 includes an air pump 61 and a vacuum generator 62 fixed to the bottom of the main board 31. The air supply end of the vacuum generator 62 is connected to the air pump 61 through an input pipe 65, and the suction end of the vacuum generator 62 is fixedly connected to the end of the air hole 35. The negative pressure generating component 6 also includes an air suction pipe 63, one end of which passes through the driven gear 53 and is fixed to the driven gear 53. One end of the air suction pipe 63 connected to the driven gear 53 matches the position of the air hole 35, and the other end of the air suction pipe 63 is fixed with multiple branch pipes 64, and the multiple branch pipes 64 are respectively connected to each suction cup 4.

[0029] Among them, the number of branch pipes 64 and suction cups 4 is the same and they correspond one to one. In the initial state, the end of the suction pipe 63 is connected to the air hole 35. When in use, the air pump 61 operates to output airflow. When the airflow passes through the vacuum generator 62, the suction end of the vacuum generator 62 generates suction. The airflow enters the vacuum generator 62 through the suction cup 4, the branch pipe 64, and the suction pipe 63, and then the top of the suction cup 4 generates suction, so that the suction cup 4 adsorbs the bottom of the workpiece to be processed. When the driving component 5 drives the driven gear 53 to rotate, the driven gear 53 drives the end of the suction pipe 63 to move, so that it is staggered with the position of the air hole 35. Therefore, when the driven gear 53 rotates, the suction cup 4 not only swings accordingly, but also loses suction. Therefore, the waste material on the top of the suction cup 4 slides down, realizing the unloading of the waste material. By providing a negative pressure generating component 6, suction is generated at the end of the suction cup 4. By fixing the suction pipe 63 to the driven gear 53, the suction cup 4 loses suction while the driving component 5 drives the suction cup 4 to swing, making it easier for waste on the suction cup 4 to fall off.

[0030] Example 5, see Figure 6 Different from the above embodiment, the suction cup 4 includes a vertically arranged outer tube 41, an inner tube 42 is movably inserted in the outer tube 41, the bottom end of the inner tube 42 is fixed to the end of the branch tube 64, the top end of the inner tube 42 extends to the outside of the outer tube 41 and is fixed with a rubber end 43, a return spring 44 is fixed between the rubber end 43 and the top end of the outer tube 41, and the return spring 44 is sleeved on the outside of the inner tube 42.

[0031] When in use, the rubber end 43 has suction. When the suction cup 4 is attached to the bottom of the workpiece processing point, the rubber end 43 is attached to the bottom of the workpiece processing point, and the return spring 44 is in a compressed state. The elastic force of the return spring 44 makes the rubber end 43 fit more closely to the workpiece, thereby improving the suction and fixing effect of the suction cup 4 on the waste part. In addition, the return spring 44 allows the rubber end 43 and the inner tube 42 to float vertically within a certain range, so that the suction cup 4 can not only adsorb flat surfaces, but also curved surfaces. Therefore, it is suitable for milling work on different workpiece surfaces and has higher applicability.

[0032] Example 6, see Figure 5 and Figure 6, which is different from the above embodiment, the plurality of suction cups 4 are mounted on the sub-plate 32 through an adjusting assembly 10, the adjusting assembly 10 is used to drive the plurality of suction cups 4 to move and disperse from each other, the adjusting assembly 10 comprises a cylinder 101 fixedly plugged on the sub-plate 32, a square groove is provided in the cylinder 101, a square nut sleeve 102 is provided in the square groove, a bracket 103 is fixed at the bottom end of the cylinder 101, a second motor 104 is fixed on the bracket 103, an adjusting screw 105 is fixed on the output shaft of the second motor 104, and the adjusting screw 1 05 is threadedly connected with the square nut sleeve 102, and the outer wall of the cylinder 101 is provided with a plurality of rod groups, and the plurality of rod groups are respectively matched with each suction cup 4, and each of the rod groups includes two inclined rods 106 distributed up and down and parallel to each other, one end of the inclined rod 106 is hinged to the outer wall of the cylinder 101, and the other end of the inclined rod 106 is hinged to the outer wall of the outer tube 41, and the outer wall of the square nut sleeve 102 is also provided with a plurality of push rods 107, one end of the push rod 107 is hinged to the outer wall of the square nut sleeve 102, and the other end of the push rod 107 is hinged to the upper inclined rod 106 in the rod group.

[0033] In actual application, the cutting range of the workpiece surface is different, and the size of the waste generated is also different. Therefore, when the size of the waste changes, the adjustment component 10 can be used to adjust the positions of the multiple suction cups 4, so that the support points are more dispersed, and the suction points of the waste are also more dispersed; When in use, the second motor 104 is started, and the second motor 104 drives the adjusting screw 105 to rotate when it is running. When the adjusting screw 105 rotates, it drives the square nut sleeve 102 to move vertically along the square groove. When the square nut sleeve 102 moves, it drives one end of the push rod 107 to move, and the other end of the push rod 107 pushes the upper inclined rod 106 to swing. At this time, the cylinder 101, the two inclined rods 106 and the outer tube 41 form a four-bar linkage. When one of the inclined rods 106 swings, the other inclined rod 106 swings in the same action, and the outer tube 41 moves while maintaining a vertical state. When the outer tube 41 moves, the distance from the cylinder 101 changes. At this time, multiple outer tubes 41 move synchronously, so that the positions of each suction cup 4 are gradually dispersed; By setting the adjustment component 10, when the milling range becomes larger, the adjustment component 10 can simultaneously drive multiple suction cups 4 to disperse to the surroundings while maintaining verticality after operation, so that the support points are dispersed, the support effect on the milling part is better, and the applicability is higher.

[0034] Embodiment 7, see Figure 7-Figure 9, which is different from the above embodiment, a mounting frame 11 is fixed on the vertical slide 140, two symmetrically distributed longitudinal slides 12 are fixed inside the mounting frame 11, and longitudinal slides 13 are provided on the two longitudinal slides 12, and a transverse slide 14 is fixed between the two longitudinal slides 13, and a transverse slide 15 is provided on the transverse slide 14, and a third motor 16 and an extension frame 17 are fixedly connected to the transverse slide 15, and the output shaft of the third motor 16 passes through the extension frame 17 and is fixed with a first bevel gear 18, and a frame 19 is provided at the end of the extension frame 17, and a sleeve 20 is fixed on one side of the frame 19, and the sleeve 20 is sleeved on the outside of the output shaft of the third motor 16 and is connected to the extension frame 17. The extension frame 17 is rotatably connected, the milling head 2 is set to two and symmetrically distributed, the milling head 2 passes through the side wall of the frame 19 and is rotatably connected to the side wall of the frame 19, a second bevel gear 21 is also fixed to the end of the milling head 2, the second bevel gear 21 is meshed with the first bevel gear 18, a worm gear 22 is fixed to the outside of the sleeve 20, a fourth motor 23 is also fixed to the extension frame 17, a worm 24 is fixed to the output shaft of the fourth motor 23, the worm 24 is installed on one side of the extension frame 17 through a bearing seat 25, the worm 24 is meshed with the worm gear 22, and the exhaust pipe 26 of the vacuum generator 62 is fixed with an exhaust pipe 26, one end of the exhaust pipe 26 is fixed to the mounting frame 11 and faces the milling head 2.

[0035] The longitudinal slide bar and the transverse slide 14 are both configured as electric slides, and the transverse slide 14 and the longitudinal slide 12 are used to drive the milling head 2 to move longitudinally and transversely so as to realize the milling action. In the initial state, one of the milling heads 2 is vertically downward, and the other milling head 2 is vertically upward; When in use, the fourth motor 23 runs, driving the first bevel gear 18 to rotate, and when the first bevel gear 18 rotates, it drives the second bevel gear 21 to rotate, and when the second bevel gear 21 rotates, it drives the milling head 2 to rotate, and at the same time the transverse slide 14 and the longitudinal slide 12 drive the milling head 2 installed on the transverse slide 15 to move, so as to realize the milling work. During the milling process, the plastic workpiece has poor thermal conductivity and low melting point, and is easily scorched and deformed due to the heat of the milling head 2. Therefore, when one of the milling heads 2 has a high temperature, the fourth motor 23 is started, and the fourth motor 23 is turned on. When the machine 23 is running, the worm 24 is driven to rotate, and when the worm 24 rotates, the worm wheel 22 is driven to rotate, and when the worm wheel 22 rotates, the sleeve 20 is driven to rotate, and when the sleeve 20 rotates, the entire frame 19 is driven to rotate. The frame 19 rotates 180 degrees, so that the milling head 2 originally pointing vertically upward is rotated to point vertically downward, so that the two milling heads 2 can be used alternately. At the same time, the gas discharged from the end of the exhaust pipe 26 is just discharged to the milling head 2 with higher heat pointing vertically upward, so as to cool down the milling head 2. When the temperature of the milling head 2 is reduced, it can be used alternately again; By providing two groups of milling heads 2, one of them can be replaced with the other when the heat is higher, thereby avoiding deformation and damage of the plastic workpiece caused by the heat of the milling head 2 and ensuring the cutting quality. In addition, by providing an exhaust pipe 26, the gas discharged from the vacuum generator 62 can be directed to one of the milling heads 2, which is beneficial to quickly cool down the milling head 2 and improve the cooling effect.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A milling machine tool, comprising a machine tool body, on which a vertical slide, a material table and a fixture are installed, characterized in that: The vertical slide is provided with a vertical slide seat, a milling head is installed on the vertical slide seat, a movable plate capable of vertical movement is installed at the bottom end of the vertical slide seat, a plurality of suction cups vertically upward are installed on the movable plate, the suction cups are used to support the cutting part on the workpiece and absorb waste during milling, and a driving component and a negative pressure generating component are also installed on the movable plate; The driving assembly is in driving connection with the suction cup, and the driving assembly is used to drive the multiple suction cups to swing simultaneously; The negative pressure generating component is connected to the suction cup, and the negative pressure generating component is used to make the suction cup generate suction; Before processing, the main body of the machine tool forces the vertical slide to move when it is in operation, so that the suction cup installed at the bottom of the vertical slide extends into the workpiece and fits the bottom of the point to be processed. The negative pressure generating component operates, forcing the suction cup to generate suction and adsorb the bottom of the point to be processed. During processing, the suction cup provides support and fixation for the waste part. After processing, the movable plate moves downward vertically, forcing the suction cup and the waste to move downward, and then the driving component operates, forcing the suction cup to swing, causing the adsorbed waste to fall off.

2. A milling machine tool according to claim 1, characterized in that: A base plate is fixed at the bottom end of the vertical slide, a vertical cylinder is fixedly connected to the top of the base plate, an output end of the vertical cylinder extends to the bottom of the base plate and is fixedly connected to the movable plate, a vertical guide rod is also fixed on the movable plate, and the vertical guide rod is movably plugged into the base plate.

3. A milling machine tool according to claim 2, characterized in that: The movable plate includes a main plate and a sub-plate with the same height. The main plate is fixed to the vertical cylinder output shaft. The main plate is provided with an end edge on one side close to the sub-plate. The sub-plate is rotatably connected to the end edge via a horizontal axis. A plurality of suction cups are installed on the top of the sub-plate.

4. A milling machine tool according to claim 3, characterized in that: The driving assembly comprises a first motor fixed on the main board, a driving gear is fixed on the output shaft of the first motor, a driven gear is meshed at the bottom of the driving gear, and the driven gear is fixedly sleeved on the horizontal shaft and fits with the end edge.

5. A milling machine tool according to claim 4, characterized in that: An air hole is opened on the end edge, and the negative pressure generating component includes an air pump and a vacuum generator fixed on the bottom of the main board. The air supply end of the vacuum generator is connected to the air pump through an input pipe, and the suction end of the vacuum generator is fixedly connected to the end of the air hole. The negative pressure generating component also includes an air suction pipe, one end of the air suction pipe passes through the driven gear and is fixed to the driven gear, one end of the air suction pipe connected to the driven gear matches the position of the air hole, and a plurality of branch pipes are fixed to the other end of the air suction pipe, and the plurality of branch pipes are respectively connected to each suction cup.

6. A milling machine tool according to claim 5, characterized in that: The suction cup includes a vertically arranged outer tube, an inner tube is movably inserted in the outer tube, the bottom end of the inner tube is fixed to the end of the branch tube, the top end of the inner tube extends to the outside of the outer tube and is fixed with a rubber end head, a return spring is fixed between the rubber end head and the top end of the outer tube, and the return spring is sleeved on the outside of the inner tube.

7. A milling machine tool according to claim 6, characterized in that: The plurality of suction cups are mounted on the sub-plate through an adjusting assembly, and the adjusting assembly is used to drive the plurality of suction cups to move and disperse from each other, and the adjusting assembly comprises a cylinder fixedly inserted on the sub-plate, a square groove being provided in the cylinder, a square nut sleeve being provided in the square groove, a bracket being fixed to the bottom end of the cylinder, a second motor being fixed on the bracket, an adjusting screw being fixed on the output shaft of the second motor, the adjusting screw being threadedly connected to the square nut sleeve, a plurality of rod groups being provided on the outer wall of the cylinder, and the plurality of rod groups being matched with each suction cup respectively, each of the rod groups comprising two inclined rods distributed up and down and parallel to each other, one end of the inclined rod being hinged to the outer wall of the cylinder, and the other end of the inclined rod being hinged to the outer wall of the outer tube, and a plurality of push rods being further provided on the outer wall of the square nut sleeve, one end of the push rod being hinged to the outer wall of the square nut sleeve, and the other end of the push rod being hinged to the upper inclined rod in the rod group.

8. A milling machine tool according to claim 5, characterized in that: A mounting frame is fixed on the vertical slide, and two symmetrically distributed longitudinal slides are fixed on the inner side of the mounting frame, and longitudinal slides are arranged on the two longitudinal slides, and a transverse slide is fixed between the two longitudinal slides, and a transverse slide is arranged on the transverse slide, and a transverse slide is fixed on the transverse slide, and a third motor and an extension frame are fixedly connected to the transverse slide, and the output shaft of the third motor passes through the extension frame and is fixed with a first bevel gear. A frame is provided at the end of the extension frame, and a sleeve is fixed on one side of the frame, and the sleeve is sleeved on the outside of the output shaft of the third motor and is rotatably connected with the extension frame. The milling heads are provided with two and are symmetrically distributed, and the milling heads pass through the side wall of the frame and are rotatably connected to the side wall of the frame. A second bevel gear is also fixed on the end of the milling head, and the second bevel gear is meshed with the first bevel gear, and a worm gear is fixed on the outside of the sleeve, and a fourth motor is also fixed on the extension frame, and a worm is fixed on the output shaft of the fourth motor, and the worm is mounted on one side of the extension frame through a bearing seat, and the worm is meshed with the worm gear.

9. A milling machine tool according to claim 8, characterized in that: The exhaust pipe of the vacuum generator is fixed with an exhaust pipe, one end of which is fixed on the mounting frame and faces the milling head.

10. A milling method for producing automobile plastic parts, characterized in that: The milling method for producing automobile plastic parts uses a milling machine tool as described in any one of claims 1-9.

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