A high-precision die frame plate positioning milling device

Abstract

The application discloses a high-precision mold frame plate positioning milling device and belongs to the technical field of milling. The device comprises a machine tool main body, a clamping assembly, a lifting assembly, a cleaning assembly and an extrusion assembly. The machine tool main body is internally provided with a machining main shaft and a horizontal movement module. The lifting assembly comprises a lifting unit and a trigger unit provided with a track groove on the surface. The cleaning assembly comprises a spraying unit and a gas blowing unit. The extrusion assembly comprises a driving unit, a guide unit and an extrusion piece. The lifting assembly is used for moving the cleaning assembly downward to a working position, and the horizontal reciprocating movement of the workbench is used for scraping and synchronous chip removal. The driving unit slides along the track groove and is guided to press down the support frame, the angle of the cleaning assembly is changed to realize spraying, in the return stroke, the rigid extrusion piece drives the gas blowing unit to rotate, the scraping part is avoided and switched to the gas blowing state for cleaning, the closed-loop cleaning of physical scraping, spraying softening and gas blowing is realized, and the problem of low manual cleaning efficiency is solved.

Description

Technical Field

[0001] This invention relates to the field of milling technology, and in particular to a high-precision positioning and milling device for mold frame plates. Background Technology

[0002] In the field of mold manufacturing and machining, CNC milling of high-precision mold base plates is a fundamental process. Existing mold base plate positioning milling equipment mainly relies on the T-slot worktable of CNC machine tools. The conventional clamping and positioning method is as follows: several cylindrical pads or support columns are pre-placed on the worktable as bottom height references. Then, the mold base plate is hoisted onto the pads and locked and fixed on the worktable by fasteners such as T-nuts and pressure plates for processing. Since high-precision mold base plates have high requirements for the flatness and parallelism of the machined surface, any foreign objects mixed between the reference surfaces will cause positioning errors. Therefore, before placing the pads and clamping the workpiece, it is necessary to clean and prepare the machine tool worktable and the inside of the T-slot.

[0003] In current production operations, the main method of cleaning relies on manual hand-held pneumatic tools: workers typically first use a high-pressure air gun, inserting the tip of the gun barrel into the T-slot of the machine tool, to physically scrape and blow dry air to remove large pieces of iron filings. After the initial cleaning, cutting fluid is sprayed onto the worktable and T-slot, relying on the dissolving power of the cutting fluid to soften the attached sludge and suspend the tiny iron filings at the bottom. Finally, workers need to use the high-pressure air gun again to perform a wet blowing operation with liquid rinsing on the worktable. Only after thorough cleaning can cylindrical pads be placed and the mold frame plates be hoisted for clamping and positioning. However, the complicated multi-step manual cleaning operation consumes a lot of time, resulting in excessive downtime between two processing tasks. At the same time, the air gun barrel is prone to wear during the physical scraping process, which can easily scratch the machine tool worktable. Summary of the Invention

[0004] This invention provides a high-precision positioning and milling device for mold frame plates to solve the technical problems of existing manual cleaning methods that involve scraping, spraying, and multiple purging with a handheld air gun, which leads to easy wear and scratches on the air gun barrel and excessively long waiting time for machine tool assistance.

[0005] The present invention adopts the following technical solution: a high-precision mold frame plate positioning milling device. It includes a machine tool body, which internally houses a milling assembly and a horizontal moving module; A clamping assembly is provided at the movable end of the horizontally moving module, and includes a worktable; A lifting assembly, disposed on the milling assembly, includes a lifting unit that provides vertical power and a triggering unit that is driven to move up and down by the lifting unit, wherein the surface of the triggering unit is provided with a track groove; The cleaning assembly includes a support frame that is connected to the bottom of the trigger unit, and a spray unit and an air blowing unit disposed on the support frame. The spray unit is used to spray cutting fluid onto the worktable, and the air blowing unit is provided with a scraping component for adhering to the worktable to scrape off and blow away waste material. The squeezing assembly, located between the lifting assembly and the cleaning assembly, includes a guiding unit, a drive unit spanning across, and an offset unit. One end of the drive unit slides along the track groove, while the other end is guided by the guiding unit to apply downward pressure to the support frame, driving it to rotate around the pivot to change the tilt angle of the spray unit and the air blowing unit. The offset unit is used to make the air blowing unit rotate relative to each other, so that the scraping component avoids it and the working state is switched synchronously.

[0006] Furthermore, the milling assembly includes a spindle box fixed inside the machine tool body, the lifting unit includes a fixed frame and a lifting cylinder, the fixed frame is fixed to the side of the spindle box, the lifting cylinder is vertically fixed to the fixed frame, and the triggering unit includes a trigger plate, an extension plate and a guide rod, the trigger plate is fixed to the telescopic end of the lifting cylinder, the extension plate extends fixedly to the bottom surface of the trigger plate, and the guide rod is fixed to the upper surface of the trigger plate and moves vertically upward through the fixed frame.

[0007] Furthermore, the trajectory groove includes a first slide groove, a second slide groove, and a third slide groove. The first slide groove is formed on the surface of the trigger plate and is inclined upward. The second slide groove is formed at one end of the first slide groove and is inclined upward. The third slide groove is formed between the first slide groove and the second slide groove and is inclined downward. The connection between one end of the third slide groove and one end of the first slide groove has a first step, and the connection between one end of the second slide groove and one end of the third slide groove has a second step. The height difference between the first step and the second step guides the drive unit to slide unidirectionally in a circular motion.

[0008] Furthermore, the guiding unit includes a cam pressure plate, which is fixed to the upper side of the trigger plate. Its bottom surface has an inclined groove, which includes a first inclined surface with an upward trend and a second inclined surface with a downward trend. The driving unit includes a horizontal cylinder, a guide optical shaft, a pressing rod, and a movable sleeve. The horizontal cylinder is fixed to the side of the trigger plate by a bracket. The guide optical shaft is vertically and movably sleeved on the telescopic end of the horizontal cylinder. The movable sleeve is fixed to one end of the guide optical shaft. A sliding pin is fixed to the side of the movable sleeve. The sliding pin is initially located at the inclined bottom end of the first sliding groove. The pressing rod is vertically and movably inserted inside the movable sleeve. Both ends of the pressing rod are spherical ends. The spherical end of the pressing rod initially abuts against the initial position of one end of the first inclined surface.

[0009] Furthermore, the offset unit includes a right-angle bracket and an extrusion member. The right-angle bracket is fixed to the side of the spindle box, and the extrusion member is fixedly disposed on the side of the right-angle bracket.

[0010] Furthermore, the support frame includes a rotating component and an inclined support arm. The rotating component is rotatably mounted on the bottom side of the extension plate, and one end of the rotating component has a shoulder. The inclined support arm is rotatably mounted on the rotating component, and its upper surface has an elongated groove. The spherical end of the bottom of the pressing rod restricts sliding within the elongated groove and is adapted to press against the upper surface of the right end of the inclined support arm when pressed. A second torsion spring is sleeved on the rotating component, and the two ends of the second torsion spring are respectively connected to the shoulder and the inclined support arm, so that the inclined support arm initially maintains an upward tilt from left to right.

[0011] Furthermore, the spraying unit includes a first clamp, a spray pipe, and nozzles. The first clamp is fixed to one end of the inclined support arm. The spray pipe is fixed and clamped inside by the first clamp and has a connector at one end. A plurality of nozzles are distributed along the straight direction of the spray pipe, and the plurality of nozzles are respectively located on the same vertical line as the T-slots corresponding to the worktable.

[0012] Furthermore, the air blowing unit includes a second clamp, a U-shaped frame, and an air blowing pipe. The second clamp is fixed to the other end of the inclined support arm, the horizontal end of the U-shaped frame is fixed inside the second clamp, and the air blowing pipe is horizontally fixed on the U-shaped frame.

[0013] Furthermore, the air blowing unit also includes a rotating sleeve and several T-shaped scrapers. The two ends of the rotating sleeve are movably sleeved on the air blowing pipe through torsion springs. Several T-shaped scrapers are distributed along the straight direction of the rotating sleeve for corresponding sliding into the T-shaped groove of the worktable. Several through holes are opened along the straight direction of the air blowing pipe and the rotating sleeve. Two rows of through holes are opened on the air blowing pipe. In the initial state, one row of through holes on the air blowing pipe corresponds to and communicates with one row of through holes on the rotating sleeve.

[0014] Furthermore, the inner wall of the rotating sleeve is provided with a convex ball along the circumference, and the circumferential surface of the air blowing pipe is provided with corresponding first buckle hole and second buckle hole at a set included angle. The circumferential surface of the air blowing pipe is also provided with an arcuate groove that is connected to the first buckle hole and located away from the second buckle hole. In the initial state, the convex ball is engaged with the first buckle hole to lock the relative position. The outer surface of the rotating sleeve is fixed with a trigger shaft. When the inclined support arm is pressed and deflects around the rotating member and drives the U-shaped frame to make an arc movement, the trigger shaft is resisted by the extrusion member and drives the rotating sleeve to deflect so that the convex ball switches to the second buckle hole.

[0015] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: A high-precision positioning and milling device for mold frame plates is disclosed. This invention utilizes a lifting assembly, a cleaning assembly, and a pressing assembly housed within the machine tool body, all linked to a horizontal moving module. The lifting unit drives a trigger unit and the cleaning assembly to move downwards to align with the working height. Simultaneously, the reciprocating motion driven by the horizontal moving module causes the scraping component of the air blowing unit to adhere to the worktable, performing physical scraping and synchronous air blowing. Meanwhile, the pressing assembly's driving unit slides along a track groove on the surface of the trigger unit and is guided by a guiding unit to apply downward pressure to the support frame, driving the cleaning assembly to rotate around its axis to dynamically adjust its position. By adjusting the tilt angles of the spray unit and the air blowing unit, cutting fluid spraying is applied to the worktable. The offset unit rotates the air blowing unit relative to each other to synchronously switch working states and avoid scraping parts. This achieves an automated closed-loop cleaning sequence of physical scraping, spray softening, and deep air blowing. This not only reduces the labor intensity of manual cleaning and shortens the auxiliary preparation time before machine tool feed, but also avoids wear and scratches on the air gun barrel caused by traditional manual cleaning through mechanism trajectory control, ensuring the Z-axis reference accuracy and machining consistency of the mold plate for subsequent clamping and positioning. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of a high-precision mold plate positioning and milling device according to this application.

[0018] Figure 2 For the present invention Figure 1 The main view.

[0019] Figure 3 For the present invention Figure 1 A schematic diagram of a partial structure.

[0020] Figure 4 For the present invention Figure 1 Schematic diagram of the clamping assembly structure.

[0021] Figure 5 For the present invention Figure 4 Diagram of the cleanup component structure.

[0022] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0023] Figure 7 For the present invention Figure 4A partial structural diagram.

[0024] Figure 8 for Figure 7 A magnified structural diagram at point B in the middle.

[0025] Figure 9 for Figure 7 A magnified structural diagram at point C.

[0026] Figure 10 for Figure 7 A magnified structural diagram at point D.

[0028] Figure label: 1. Machine tool body; 2. Milling assembly; 21. Spindle box; 22. Machining spindle; 3. Clamping assembly; 31. Worktable; 32. Clamping unit; 321. Cylindrical pad; 322. Pressure plate; 323. Fastening nut; 324. T-bolt; 33. Machining base; 34. Y-axis moving module; 35. X-axis moving module; 4. Lifting assembly; 41. Fixed frame; 42. Lifting cylinder; 43. Trigger plate; 431. Extension plate; 432. Guide rod; 433. First slide rail; 436. Second slide rail; 437. Third slide rail; 5. Extrusion assembly Components; 51. Cam pressure plate; 501. First inclined surface; 502. Second inclined surface; 52. Horizontal cylinder; 53. Guide optical axis; 54. Press rod; 55. Movable sleeve; 551. Spherical end; 56. Right angle frame; 57. Extrusion component; 6. Cleaning assembly; 61. Rotating component; 62. Inclined support arm; 63. Second torsion spring; 64. First clamp; 65. Spray pipe; 66. Connector; 67. Nozzle; 68. Second clamp; 69. U-shaped frame; 610. Rotating sleeve; 611. Air blow pipe; 612. T-shaped scraper; 613. Through hole; 614. Trigger shaft. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0030] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1-10As shown, this embodiment provides a high-precision positioning and milling device for mold frame plates, including a machine tool body 1, which has a milling assembly 2 and a horizontal moving module inside; a clamping assembly 3, located at the movable end of the horizontal moving module, which includes a worktable 31; a lifting assembly 4, located at the milling assembly 2, including a lifting unit that provides vertical power and a triggering unit that is driven to move up and down by the lifting unit, the surface of the triggering unit having a trajectory groove; and a cleaning assembly 6, including a support frame that is connected to the bottom end of the triggering unit, and a spraying unit and an air blowing unit located on the support frame, the spraying unit being used to spray the milling assembly 2 with air. The workbench 31 is sprayed with cutting fluid. The air blowing unit is equipped with a scraping component for adhering to the workbench 31 to scrape and blow away waste material. The extrusion assembly 5 is located between the lifting assembly 4 and the cleaning assembly 6. It includes a guiding unit, a drive unit that spans across, and an offset unit. One end of the drive unit slides along the track groove, and the other end is guided by the guiding unit to apply downward pressure to the support frame, driving it to rotate around the pivot to change the tilt angle of the spraying unit and the air blowing unit. The offset unit is used to make the air blowing unit rotate relative to each other so that its scraping component avoids and synchronously switches the working state.

[0032] The working principle of this device is as follows: After the mold frame plate is processed and before the next clamping, the lifting component 4 is used to move the cleaning component 6 down to near the surface of the worktable 31. Then, the horizontal moving module of the machine tool drives the worktable 31 to perform horizontal reciprocating motion. During the first horizontal displacement, the scraping component of the air blowing unit slides into the T-slot for physical scraping and simultaneously blows air to remove chips. After reaching the end of the horizontal displacement stroke, the mechanical linkage between the extrusion component 5 and the trajectory groove is used to change the tilt angle of the cleaning component 6, so that the spraying unit is aligned with the worktable 31. At this time, the second horizontal displacement process is realized, and the spraying unit sprays cutting fluid to soften stubborn chips. After the second horizontal displacement is completed, the extrusion component 5 performs a reset return action. Under the mechanical linkage of the return stroke, the offset unit automatically triggers the air blowing unit to rotate relative to the scraping component, so that the scraping component is lifted to avoid it, and at the same time, the internal air path is switched. At this time, the third horizontal displacement process is realized, and the switched pure high-pressure airflow is used to perform a final deep drying and cleaning of the table surface sprayed with cutting fluid. After that, the component is completely reset to the initial state, thereby completing the standardized machine tool reference surface cleaning without manual intervention.

[0033] Reference Figures 1-3 As shown, a machining base 33 is provided on the bottom surface inside the machine tool body 1. The milling assembly 2 includes a spindle box 21 fixed inside the machine tool body 1 and a machining spindle 22 installed at the output end of the spindle box 21. The machining spindle 22 is driven to rotate to drive the milling cutter to perform positioning milling on the mold plate.

[0034] To achieve multi-dimensional machining and cleaning positioning, a composite moving module is provided on the machining base 33, which includes a Y-axis moving module 34 and an X-axis moving module 35. The Y-axis moving module 34 is horizontally mounted on the machining base 33 and drives the clamping assembly 3 to reciprocate longitudinally along the machine tool. The X-axis moving module 35 is mounted on the movable end of the Y-axis moving module 34. The worktable 31 of the clamping assembly 3 is directly fixed to the X-axis moving module 35, and the X-axis moving module 35 drives the worktable 31 to perform high-precision reciprocating movement laterally.

[0035] To achieve stable clamping of the mold base plate on the machine tool, refer to Figure 4 As shown, the milling assembly 2 includes a spindle box 21 fixed inside the machine tool body 1, and the clamping assembly 3 includes a clamping unit 32. The clamping unit 32 includes a cylindrical pad 321, a pressure plate 322, a fastening nut 323, and a T-bolt 324. The cylindrical pad 321 is adapted to be vertically supported on the cleaned worktable 31 surface, serving as a height reference fulcrum for the mold frame plate. The lower end of the T-bolt 324 slides and engages in the T-slot of the worktable 31. The screw part extends vertically upwards, and the pressure plate 322 is fitted on the T-bolt 324 in a horizontal or slightly inclined state. One end of the pressure plate 322 overlaps the top of the cylindrical pad 321, and the other end overlaps the upper surface of the workpiece to be processed. The fastening nut 323 is screwed and tightened from above the pressure plate 322 onto the threaded section of the T-bolt 324. By tightening the fastening nut 323 downwards, a strong downward clamping force is generated on the workpiece, ensuring the parallelism of the clamping surface and the Z-axis accuracy.

[0036] To achieve automatic lowering and raising of the cleaning component 6 in the Z-axis direction, refer to Figures 5-7 As shown, the lifting unit includes a fixed frame 41 and a lifting cylinder 42. The fixed frame 41 is fixed to the side of the spindle box 21, and the lifting cylinder 42 is vertically fixed to the fixed frame 41. The triggering unit includes a trigger plate 43, an extension plate 431, and a guide rod 432. The trigger plate 43 is fixed to the telescopic end of the lifting cylinder 42, the extension plate 431 extends fixedly to the bottom surface of the trigger plate 43, and the guide rod 432 is fixed to the upper surface of the trigger plate 43 and moves vertically upward through the fixed frame 41. The lifting cylinder 42 can directly drive the entire triggering unit and the cleaning assembly 6 suspended below it to move vertically. The sliding through-type design of the guide rod 432 within the fixed frame 41 can effectively resist the lateral cutting torque generated during horizontal cleaning, ensuring smooth downward movement of the cleaning head.

[0037] To provide timing control, the surface of the trigger plate 43 is provided with a track groove, which includes a first slide groove 433, a second slide groove 436, and a third slide groove 437. The first slide groove 433 is formed on the surface of the trigger plate 43 and is inclined upward. The second slide groove 436 is connected to one end of the first slide groove 433 and is inclined upward. The third slide groove 437 is connected between the first slide groove 433 and the second slide groove 436 and is inclined downward. One end of the third slide groove 437 has a first step at the connection with one end of the first slide groove 433, and one end of the second slide groove 436 has a second step at the connection with one end of the third slide groove 437. Through the height difference design of each step, a unidirectional loop (diamond track) is formed on the surface of the trigger plate 43, which can only slide in a unidirectional sequence of the first slide groove 433, the second slide groove 436, and the third slide groove 437.

[0038] In order to convert the horizontal driving force into controllable vertical downforce, refer to Figure 8 As shown, the guiding unit includes a cam plate 51, which is fixed to the upper side of the trigger plate 43. Its bottom surface has an inclined groove, which includes a first inclined surface 501 with an upward inclined trend and a second inclined surface 502 with a downward inclined trend. The driving unit includes a horizontal cylinder 52, a guide shaft 53, a pressing rod 54, and a movable sleeve 55. The horizontal cylinder 52 is fixed to the side of the trigger plate 43 by a bracket. The guide shaft 53 is vertically and movably sleeved on the telescopic end of the horizontal cylinder 52. The movable sleeve 55 is fixed to one end of the guide shaft 53. A sliding pin is fixed on the side of the movable sleeve 55. The sliding pin is initially located at the inclined bottom end of the first sliding groove 433. The pressing rod 54 is vertically and movably inserted inside the movable sleeve 55. Both ends of the pressing rod 54 are spherical ends 551. The spherical end 551 at the top of the pressing rod 54 initially abuts against the initial position of one end of the first inclined surface 501.

[0039] The horizontal cylinder 52 is used to push the movable sleeve 55 to move horizontally. The sliding pin shaft on its side is forced to climb upward along the inclined surface of the track groove, thereby driving the guide shaft 53 and the entire movable sleeve 55 to rise. At the same time, the pressing rod 54, which is inserted inside the movable sleeve 55, follows the horizontal displacement. The spherical end 551 at its top is forced to generate a relatively downward squeezing displacement under the rigid constraint of the first inclined surface 501 and the second inclined surface 502, thereby transforming the single horizontal thrust into a composite motion that combines horizontal displacement and vertical variable downward pressure.

[0040] To achieve the one-way triggering function of the action, the offset unit includes a right-angle bracket 56 and a pressing member 57. The right-angle bracket 56 is fixed to the side of the spindle box 21, and the pressing member 57 is fixedly set on the side of the right-angle bracket 56. During the preceding displacement process, when the air blowing unit contacts the pressing member 57, the pressing member 57 is adapted to become a rigid pivot point, causing the air blowing unit to rotate relative to the pivot point.

[0041] In order to enable the cleaning component 6 to have angle adjustment capability, refer to Figures 9-10 As shown, the support frame includes a rotating component 61 and an inclined support arm 62. The rotating component 61 is rotatably mounted on the bottom side of the extension plate 431, and one end of it has a shoulder. The inclined support arm 62 is rotatably mounted on the rotating component 61, and its upper surface has an elongated groove. The spherical end 551 of the bottom of the pressing rod 54 restricts its sliding within the elongated groove. A second torsion spring 63 is sleeved on the rotating component 61. The two ends of the second torsion spring 63 are respectively connected to the shoulder and the inclined support arm 62, which is used to keep the inclined support arm 62 initially tilted upward from left to right. When the pressing rod 54 moves downward under the force of the guide unit, its bottom spherical end 551 slides along the elongated groove and presses down on the inclined support arm 62, overcoming the elastic force of the second torsion spring 63, so that the inclined support arm 62 deflects downward around the rotating component 61. When the pressure of the pressing rod 54 is released, the second torsion spring 63 automatically resets it.

[0042] The spray unit includes a first clamp 64, a spray pipe 65, and nozzles 67. The first clamp 64 is fixed to one end of the inclined support arm 62. The spray pipe 65 is fixedly clamped inside the first clamp 64, and one end is connected to a connector 66. Several nozzles 67 are distributed along the straight direction of the spray pipe 65, and the nozzles 67 are respectively located on the same vertical line as the corresponding T-slots on the worktable 31. When the inclined support arm 62 is pressed downward, the spray pipe 65 fixed on it moves downward, so that the nozzles 67 are aligned with the surface of the worktable 31 and the inside of the T-slots. The high-pressure cutting fluid introduced through the connector 66 can be accurately sprayed to dissolve stubborn sludge.

[0043] The air blowing unit includes a second clamp 68, a U-shaped frame 69, and an air blowing pipe 611. The second clamp 68 is fixed to the other end of the inclined support arm 62. The horizontal end of the U-shaped frame 69 is fixed inside the second clamp 68. The air blowing pipe 611 is horizontally fixed on the U-shaped frame 69. The air blowing unit is suspended from the other end of the inclined support arm 62 by using the second clamp 68, so that it forms a balanced layout with the spray unit at both ends of the lever.

[0044] Furthermore, the air blowing unit also includes a rotating sleeve 610 and several T-shaped scrapers 612. The two ends of the rotating sleeve 610 are movably connected to the air blowing pipe 611 via torsion springs. Several T-shaped scrapers 612 are distributed along the straight direction of the rotating sleeve 610 for corresponding sliding insertion into the T-slots of the worktable 31. Several through holes 613 are provided along the straight directions of both the air blowing pipe 611 and the rotating sleeve 610. The air blowing pipe 611 has two rows of through holes 613. In the initial state, one row of through holes 613 on the air blowing pipe 611 corresponds to and communicates with one row of through holes 613 on the rotating sleeve 610. During the initial scraping operation, the T-shaped scrapers 612 are adapted to slide into the T-slots, and the high-pressure gas in the air blowing pipe 611 is blown out through the corresponding first row of through holes 613, achieving physical chip removal through simultaneous scraping and blowing.

[0045] To achieve automatic switching of the air path mode and avoidance of the T-shaped scraper 612, a convex ball is provided on the inner wall of the rotating sleeve 610 along the circumference. The circumferential surface of the air blowing pipe 611 has two corresponding fastening holes at a set angle. In the initial state, the convex ball is engaged with one of the fastening holes to lock the relative position. It should be noted that an arcuate groove (not shown in the figure) connected to the initial fastening hole is provided on the circumferential surface of the air blowing pipe 611. This arcuate groove is away from the other fastening hole. A trigger shaft 614 is fixed on the outer surface of the rotating sleeve 610. The trigger shaft 614 is used to drive the rotating sleeve 610 to rotate relative to the air blowing pipe 611 when the inclined support arm 62 is pressed and deflects around the rotating member 61 and drives the U-shaped frame 69 to make an arc movement. The trigger shaft 614 is then pressed by the squeezing member 57, thereby driving the rotating sleeve 610 to rotate relative to the air blowing pipe 611, so that the convex ball switches to fasten into the other fastening hole.

[0046] Working principle: After the mold frame plate is processed and unloaded, the PLC control system starts the cleaning program. First, the lifting cylinder 42 is started, driving the trigger unit (including trigger plate 43, extension plate 431, etc.) to move vertically downward along the guide rod 432 until the T-shaped scraper 612 at the bottom of the cleaning component 6 is in the preset working position at the height of the corresponding worktable 31.

[0047] At this time, the sliding pin shaft on the side of the movable sleeve 55 is initially located at the bottom of the first sliding groove 433. The X-axis moving module 35 is started, driving the worktable 31 to move horizontally, so that the worktable 31 moves relative to the stationary T-shaped scraper 612. During this process, several T-shaped scrapers 612 slide into the corresponding T-shaped grooves of the worktable 31 to perform scraping operations. At the same time, since the air blowing pipe 611 and the first row of through holes 613 on the rotating sleeve 610 are in a corresponding connected state, the high-pressure gas synchronously blows the waste in the T-shaped groove to remove chips, realizing the initial cleaning of scraping and blowing at the same time.

[0048] After the first stage of reciprocating scraping is completed, the horizontal cylinder 52 is activated, pushing the guide shaft 53 and the movable sleeve 55 to move horizontally. At this time, the sliding pin shaft slides from the first sliding groove 433 to the second sliding groove 436. During this process, the pressing rod 54 moves synchronously with the movable sleeve 55. Its top spherical end 551 is gradually restricted by the rigidity of the second inclined surface 502 (which tends to tilt downward) on the bottom surface of the cam pressure plate 51, forcing the pressing rod 54 to produce a vertical downward squeezing displacement. The spherical end 551 at the bottom of the pressing rod 54 slides and presses down in the long groove at the right end of the inclined support arm 62, overcoming the torque of the second torsion spring 63, and driving the inclined support arm 62 to deflect downward around the rotating part 61 (i.e., the left end is facing up and the right end is facing down).

[0049] At this time, the sliding pin shaft crosses the second step (located at the connection between the second slide groove 436 and the third slide groove 437) and enters one end of the third slide groove 437. In this state, the spray pipe 65 faces downward and is aligned with the worktable 31. The X-axis moving module 35 drives the worktable 31 to move horizontally again. The nozzle 67 sprays cutting fluid onto the table surface to soften the sludge. During this process, the air blowing unit moves clockwise along with the inclined support arm 62, and the trigger shaft 614 contacts the rigidly set extrusion piece 57 in the positive direction. At this time, the convex ball inside the rotating sleeve 610 is forced to disengage from the initial buckle hole and slide into the corresponding arc groove. When the trigger shaft 614 passes one end of the extrusion piece 57, under the action of the pre-tightening force of the torsion spring inside the rotating sleeve 610, the convex ball automatically springs back and buckles at the initial buckle hole.

[0050] After the spray softening is completed, the horizontal cylinder 52 performs a reset return motion, causing the movable sleeve 55 to move in the opposite direction. At this time, the sliding pin shaft slides along the third slide groove 437 and is unable to move backward due to the physical obstruction of the first step (located at the connection between the third slide groove 437 and the first slide groove 433). Finally, it is guided back to the initial end of the first slide groove 433 via the trajectory. During this return process, the pressing rod 54 no longer generates downward pressure, and the inclined support arm 62 has an upward deflection reset tendency under the action of the second torsion spring 63. At this time, the entire air blowing unit moves counterclockwise along the U-shaped frame 69 in an arc reset motion, and the trigger shaft 614 on it contacts the extrusion piece 57 in the opposite direction. Since the extrusion piece 57 is a rigid component, it becomes a rigid pivot point that actuates the trigger shaft 614.

[0051] The actuation action drives the rotating sleeve 610 to deflect at an angle relative to the air blow pipe 611, causing the T-shaped scraper 612 to deflect upward and flip up, detaching from the surface of the worktable 31 to prevent interference. The internal convex ball switches to another locking hole to lock, so that the second row of through holes 613 on the air blow pipe 611 corresponds to the through hole 613 of the rotating sleeve 610. Subsequently, the X-axis moving module 35 drives the worktable 31 to move horizontally again, using the switched pure high-pressure airflow to treat the table surface sprayed with cutting fluid. After cleaning, the lifting cylinder 42 drives the cleaning assembly 6 to move upward and reset as a whole. At this time, the reference surface of the worktable 31 and the inside of the T-slot have been cleaned.

[0052] After the third stage of pure high-pressure air blowing cleaning is completed, the horizontal cylinder 52 is restarted, but only performs a small-distance partial extension action (i.e., the reset pulse stroke). It is important to note its micro-motion triggering mechanism: This extension stroke is extremely short, causing only a small movement of the sliding pin shaft on the side of the movable sleeve 55 at the beginning of the first slide groove 433. It does not cross the step into the downward pressure groove area, thus preventing the overall downward pressure of the cleaning component 6 from malfunctioning. During this small horizontal displacement, the trigger shaft 614 moves accordingly and again makes positive contact with the rigidly set extrusion piece 57. At this time, the torsion spring inside the rotating sleeve 610 is in a high-stress, energy-stored tension state, and the convex ball maintains the avoidance posture of the T-shaped scraper 612 solely through static friction with the wall of the second snap hole.

[0053] When the trigger shaft 614 is momentarily pressed against the rigid pressing member 57, a contact torque is generated. This instantaneous pulse torque causes the convex ball to disengage from the second snap hole. Subsequently, under the pre-tightening return force of its internal torsion spring, the rotating sleeve 610 quickly and automatically reverses without the need for continuous external force, causing the convex ball to re-engage into the first initial snap hole. This causes the T-shaped scraper 612 to instantly spring back from the deflection and avoidance state and lock into the default vertical downward state. At the same time, the internal air passage also switches back to the initial scraping and blowing state. Thus, the cleaning mechanism completes the reset, and the lifting cylinder 42 then drives the cleaning assembly 6 to move upward and reset as a whole, completing the entire cleaning cycle.

[0054] The operator then performs the next clamping operation, placing the cylindrical pad 321 on the cleaned workbench 31, inserting the T-bolt 324 into the slot, and using the pressure plate 322 and fastening nut 323 to press and tighten the workpiece to be processed. Since there are no debris interfering with the surface of the workbench 31, the cylindrical pad 321 fits against the table surface, thus ensuring the parallelism of the mold plate clamping and the Z-axis positioning accuracy during the processing, completing one work cycle.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-precision positioning and milling device for mold frame plates, characterized in that, include The machine tool body (1) is equipped with a milling assembly (2) and a horizontal moving module inside; The clamping assembly (3) is located at the movable end of the horizontal moving module and includes a worktable (31); The lifting assembly (4) is located on the milling assembly (2) and includes a lifting unit that provides vertical power and a triggering unit that is driven to move up and down by the lifting unit. The surface of the triggering unit is provided with a track groove. The cleaning assembly (6) includes a support frame that is connected to the bottom of the trigger unit, and a spray unit and an air blowing unit provided on the support frame. The spray unit is used to spray cutting fluid onto the worktable (31), and the air blowing unit is provided with a scraping component for adhering to the worktable (31) to scrape off and blow away waste material. The squeezing assembly (5) is located between the lifting assembly (4) and the cleaning assembly (6), and includes a guide unit, a drive unit and an offset unit that are arranged across the axis. One end of the drive unit slides along the track groove, and the other end is guided by the guide unit to apply downward pressure to the support frame and drive it to rotate around the pivot to change the tilt angle of the spray unit and the air blowing unit. The offset unit is used to make the air blowing unit rotate relative to each other so that the scraping parts can avoid each other and switch working states synchronously.

2. The high-precision mold plate positioning and milling device according to claim 1, characterized in that: The milling assembly (2) includes a spindle box (21) fixed inside the machine tool body (1). The lifting unit includes a fixed frame (41) and a lifting cylinder (42). The fixed frame (41) is fixed to the side of the spindle box (21). The lifting cylinder (42) is vertically fixed on the fixed frame (41). The triggering unit includes a trigger plate (43), an extension plate (431), and a guide rod (432). The trigger plate (43) is fixed to the telescopic end of the lifting cylinder (42). The extension plate (431) extends fixedly to the bottom surface of the trigger plate (43). The guide rod (432) is fixed to the upper surface of the trigger plate (43) and moves vertically upward through the fixed frame (41).

3. The high-precision mold plate positioning and milling device according to claim 2, characterized in that: The track groove includes a first slide groove (433), a second slide groove (436), and a third slide groove (437). The first slide groove (433) is formed on the surface of the trigger plate (43) and is inclined upward. The second slide groove (436) is formed at one end of the first slide groove (433) and is inclined upward. The third slide groove (437) is formed between the first slide groove (433) and the second slide groove (436) and is inclined downward. One end of the third slide groove (437) has a first step at the connection between one end of the first slide groove (433) and one end of the second slide groove (436) has a second step at the connection between one end of the third slide groove (437). The height difference between the first step and the second step guides the drive unit to slide in one direction.

4. The high-precision mold plate positioning and milling device according to claim 3, characterized in that: The guiding unit includes a cam plate (51), which is fixed to the upper side of the trigger plate (43). Its bottom surface has a groove, which includes a first inclined surface (501) trending upwards and a second inclined surface (502) trending downwards. The driving unit includes a horizontal cylinder (52), a guide shaft (53), a pressing rod (54), and a movable sleeve (55). The horizontal cylinder (52) is fixed to the side of the trigger plate (43) by a bracket. The guide shaft (53) is vertically movable. Connected to the telescopic end of the horizontal cylinder (52), the movable sleeve (55) is fixed to one end of the guide shaft (53). A sliding pin is fixed to the side of the movable sleeve (55). The sliding pin is initially located at the inclined bottom end of the first slide groove (433). The pressing rod (54) is vertically and movably inserted inside the movable sleeve (55). Both ends of the pressing rod (54) are spherical ends (551). The spherical end (551) at the top of the pressing rod (54) initially abuts against the initial position of one end of the first inclined surface (501).

5. The high-precision mold plate positioning and milling device according to claim 4, characterized in that: The offset unit includes a right-angle bracket (56) and an extruder (57). The right-angle bracket (56) is fixed to the side of the spindle box (21), and the extruder (57) is fixedly disposed on the side of the right-angle bracket (56).

6. The high-precision mold plate positioning and milling device according to claim 5, characterized in that: The support frame includes a rotating component (61) and an inclined support arm (62). The rotating component (61) is rotatably mounted on the bottom side of the extension plate (431), and one end of it has a shoulder. The inclined support arm (62) is rotatably mounted on the rotating component (61), and its upper surface has an elongated groove. The spherical end (551) at the bottom of the pressing rod (54) restricts sliding within the elongated groove and is suitable for pressing against the upper surface of the right end of the inclined support arm (62) when under pressure. A second torsion spring (63) is sleeved on the rotating component (61). The two ends of the second torsion spring (63) are respectively connected to the shoulder and the inclined support arm (62) to keep the inclined support arm (62) initially tilted upward from left to right.

7. The high-precision mold plate positioning and milling device according to claim 6, characterized in that: The spray unit includes a first clamp (64), a spray pipe (65), and nozzles (67). The first clamp (64) is fixed to one end of the inclined support arm (62). The spray pipe (65) is fixedly clamped inside by the first clamp (64) and one end is connected to a connector (66). A plurality of nozzles (67) are distributed along the straight direction of the spray pipe (65), and the plurality of nozzles (67) are respectively located on the same vertical line as the corresponding T-slots on the worktable (31).

8. The high-precision mold plate positioning and milling device according to claim 6, characterized in that: The air blowing unit includes a second clamp (68), a U-shaped frame (69), and an air blowing pipe (611). The second clamp (68) is fixed to the other end of the inclined support arm (62). The horizontal end of the U-shaped frame (69) is fixed inside the second clamp (68). The air blowing pipe (611) is horizontally fixed on the U-shaped frame (69).

9. A high-precision mold plate positioning and milling device according to claim 8, characterized in that: The air blowing unit also includes a rotating sleeve (610) and several T-shaped scrapers (612). The two ends of the rotating sleeve (610) are movably sleeved on the air blowing pipe (611) by torsion springs. Several T-shaped scrapers (612) for corresponding sliding into the T-slots of the worktable (31) are distributed along the straight direction of the rotating sleeve (610). Several through holes (613) are opened along the straight direction of the air blowing pipe (611) and the rotating sleeve (610). Two rows of through holes (613) are opened on the air blowing pipe (611). In the initial state, one row of through holes (613) on the air blowing pipe (611) is correspondingly connected to one row of through holes (613) on the rotating sleeve (610).

10. A high-precision mold frame plate positioning and milling device according to claim 9, characterized in that: The inner wall of the rotating sleeve (610) is provided with a convex ball along the circumference. The circumferential surface of the air blow pipe (611) is provided with a corresponding first buckle hole and a second buckle hole at a set angle. The circumferential surface of the air blow pipe (611) is also provided with an arcuate groove that is connected to the first buckle hole and located away from the second buckle hole. In the initial state, the convex ball and the first buckle hole are engaged to lock the relative position. The outer surface of the rotating sleeve (610) is fixed with a trigger shaft (614). When the inclined support arm (62) is pressed and deflected around the rotating member (61) and drives the U-shaped frame (69) to make an arc movement, the trigger shaft (614) is resisted by the extrusion member (57) and drives the rotating sleeve (610) to deflect so that the convex ball switches to the second buckle hole.

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