Automatic milling equipment for die steel

Abstract

The application discloses a die steel automatic milling processing equipment and belongs to the technical field of numerical control machine tools and metal cutting processing. The equipment comprises a machine tool base, a first linear movement module and a rotating assembly arranged on the base, and symmetrically arranged milling power assemblies and pressing assemblies. A side pushing assembly is integrated on a second linear movement module of the milling power assembly. The side pushing assembly comprises a measuring driving unit and a measuring needle connecting seat for fixing a workpiece measuring needle. A scanning arm assembly is sleeved on the measuring needle connecting seat. The scanning arm assembly comprises a mutual cooperation resisting pushing unit and a scraping unit, and is provided with a gas blowing assembly in parallel linkage. The axial movement of the measuring needle is converted into the scraping action of the scraping unit through mechanical linkage. The surface oil film and iron filings are automatically cleaned before the measuring needle contacts the workpiece, the measuring interference is eliminated, the scraping unit is self-cleaned by the gas blowing assembly, and the efficient double-face milling and high-precision online measurement of the die steel are realized.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tools and metal cutting technology, and in particular to an automatic milling machine for mold steel. Background Technology

[0002] Currently, in the mold manufacturing field, CNC double-head milling machines are widely used for six-sided precision machining of mold steel or square metal blocks. These machines typically integrate automated measurement functions, using a workpiece probe (probe) mounted on the spindle to automatically center and measure the dimensions of the workpiece. In the actual machining process, the workpiece probe gently contacts the workpiece surface through a ruby ​​ball head, using the signal generated by the disconnection of internal circuitry to record the machine tool coordinates. This enables automatic measurement of the workpiece's length and width, as well as positioning the machining datum. This online measurement method reduces manual tool setting time and improves the automation level of multi-piece stacking machining or single-piece precision machining. When performing automated machining on existing CNC double-head milling machines, the workpiece surface inevitably has foreign matter such as cutting fluid film, fine iron filings, or dust adhering to it. Since the existing workpiece probes usually use a high-sensitivity contact triggering mechanism, they are easily triggered by surface foreign matter before the probe has even made contact with the workpiece metal body, resulting in false contact. This false triggering will cause a positive deviation in the coordinate data collected by the machine tool CNC system, thus incorrectly calculating the machining allowance, causing overcutting in the subsequent milling process, resulting in the precision mold steel being smaller than the tolerance range.

[0003] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0004] This invention provides an automatic milling machine for mold steel to solve the technical problem in the prior art where the probe makes false contact due to oil film or foreign matter adhering to the workpiece surface, resulting in measurement deviation and overcutting of the workpiece.

[0005] The present invention adopts the following technical solution: an automatic milling machine for mold steel. It includes a machine tool base; A first linear motion module is mounted on the machine tool base, including a first movable slide for carrying the workpiece to move axially. A rotary assembly is disposed on the first movable slide and is used to drive the workpiece to rotate; a milling power assembly is symmetrically disposed on both sides of the machine tool base and includes a second linear motion module and a milling unit disposed on the second linear motion module; A clamping assembly is disposed on the first movable slide and is used to clamp the workpiece; The side-pushing assembly, mounted on the second linear motion module, includes a fixed housing and a centering unit and a measurement drive unit mounted on the fixed housing; The measurement drive unit includes a telescopic cylinder and a probe connector connected to its telescopic end, and a workpiece probe is fixed at the end of the probe connector. The scanning arm assembly is movably sleeved on the probe connector and includes a mutually cooperating push unit and a scraping unit, used to clean the surface of the workpiece to be tested before the workpiece probe contacts the workpiece. An air-blowing component is disposed on the scraping unit and is used to perform air-blowing self-cleaning on the scraping unit.

[0006] Furthermore, the pushing unit includes a main sleeve rod, an annular flange, a compression spring, a pressing component, a clamping seat, a guide frame, a support spring, a sliding block, and a contact rod. The main sleeve rod is movably sleeved on one end of the probe connecting seat and is hollow inside. The annular flange is integrally fixed to one end of the main sleeve rod. The compression spring is located inside the main sleeve rod and coaxially sleeved on the outside of the workpiece probe, with its two ends connected to the annular flange and the probe connecting seat, respectively. Two pressure members are symmetrically arranged along the axis of the probe connector and are fixed to the surface of the probe connector. Each pressure member has an inclined surface. The clamp seat is fixedly sleeved on the main sleeve rod. Two guide frames are symmetrically arranged and fixed on both sides of the clamp seat. The sliding block is vertically slidably arranged inside the guide frame. The support spring is arranged on the bottom surface inside the guide frame, and its other end is connected to the bottom surface of the sliding block. The contact rod is fixed on the sliding block and is adapted to abut against the inclined surface of the pressure member.

[0007] Furthermore, the scraping unit includes a side ear plate, a contact pulley, a scraper seat, a clearance groove, a cleaning end, and an inclined through groove. The side ear plate is connected between one end of the two contact rods. The contact pulley is fixed to the side of the side ear plate and is suitable for contacting the workpiece surface. The scraper seat is fixed to the bottom of the side ear plate and has an outwardly inclined end structure. The cleaning end is located at the end of the scraper seat and is used to physically scrape away foreign objects from the workpiece surface. The clearance groove is opened on the side ear plate for the workpiece probe to pass through. The inclined through groove is opened on the scraper seat and is used to guide airflow to the cleaning position inside the cleaning end that contacts the workpiece.

[0008] Furthermore, the air blowing assembly includes a support base, a fixed tube, an air jet rod, a fixed bracket, a dustproof box, and a waist groove. The fixed bracket is fixed to the side of the main sleeve rod, the dustproof box is fixed to the side of the fixed bracket, and the waist groove is formed on both side walls of the dustproof box to allow one end of the air jet rod to slide vertically. The support base is symmetrically arranged on the scraper seat. The fixed tube is fixed at both ends between the two support bases, is hollow, and has a long strip-shaped ventilation groove near the bottom. The air jet rod is rotatably disposed inside the fixed tube and is connected to the fixed tube by a torsion spring. One end of the air jet rod extends through the waist groove into the dustproof box.

[0009] Furthermore, the air blowing assembly also includes an air jet groove, a drive gear, and a drive rack. The drive rack is fixed to one side of the inner wall of the dust box and consists of an upper smooth section and a lower toothed section. The drive gear is fixedly sleeved on one end of the air jet rod that extends into the dust box and is adapted to mesh with the drive rack when the sliding block drives the scraper seat to move vertically. The air jet groove is opened on the air jet rod and is initially misaligned with the ventilation groove on the fixed tube. The width of the air jet groove is smaller than the width of the ventilation groove.

[0010] Furthermore, the air blowing assembly also includes a pipe connector and a baffle. The pipe connector is fixed to one end of the air jet rod that extends out of the fixed pipe and is suitable for connection with an external air supply device. The baffle is fixed to the bottom surface of the end of the air jet rod that extends out of the fixed pipe and extends vertically along the dustproof box. The width of the baffle is greater than the width of the waist groove.

[0011] Furthermore, the centering unit includes a centering cylinder, a side push plate, and a guide rod. The centering cylinder is horizontally fixed inside the fixed housing. The side push plate is fixed to the telescopic end of the centering cylinder and is located outside the fixed housing. The guide rod is fixed to the side of the side push plate and is movably installed through the end of the fixed housing.

[0012] Furthermore, the clamping assembly includes a gantry frame, a top crossbeam, and a top-pressing cylinder. The gantry frame is fixed on the first movable slide, the top crossbeam is disposed on the top of the gantry frame, and the top-pressing cylinder is vertically fixed on the top crossbeam with its telescopic end facing downward, for applying clamping force to the workpiece steel from the top.

[0013] Furthermore, the first linear motion module also includes a main platform, guide rails, a lead screw nut seat, a drive component, a drive lead screw, a slider, and a first telescopic protective cover. The guide rails are symmetrically arranged on the upper surfaces of both sides of the main platform. The first movable slide is slidably mounted on the guide rails via the slider. The drive lead screw is horizontally connected to the main platform via a bearing. The lead screw nut seat is fixed to the bottom of the first movable slide and engages with the drive lead screw in a transmission manner. The drive component is fixed to one end of the main platform and connected to one end of the drive lead screw. The first telescopic protective cover is connected to both ends of the first movable slide, and its other end is connected to both ends of the main platform.

[0014] Furthermore, the second linear motion module includes a side platform, a second movable slide, and a second telescopic protective cover. The side platform is fixed on the machine tool base, the second movable slide is slidably disposed on the side platform, and the second telescopic protective cover is connected to both sides of the second movable slide, with its two ends respectively connected to the two ends of the side platform. The milling unit includes a spindle box, a spindle motor, and a milling cutter head. The spindle box is fixed on the second movable slide, the spindle motor is fixed on the second movable slide, and its output end is connected to the spindle box. The milling cutter head is fixed to the output end of the spindle box.

[0015] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: An automatic milling machine for mold steel is disclosed. This invention achieves automated feeding, rotary indexing, and efficient double-sided synchronous milling of mold steel workpieces by setting up a first linear motion module, a rotary component, and symmetrically distributed milling power components. In particular, by setting a side-push component on the second linear motion module and creatively fitting a sweeping arm component and an air-blowing component on its probe connector, the axial motion of the probe extension is converted into a scraping action by the scraping unit through the cooperation of the pushing unit and the scraping unit. Before the probe contacts the workpiece, the surface to be measured is automatically physically scraped and cleaned, effectively removing measurement interference caused by cutting fluid oil film and iron filings, ensuring that the probe can contact the actual metal surface, and improving the accuracy and reliability of online measurement. At the same time, the air-blowing component and the scraping unit are linked to perform timely air-blowing self-cleaning of the scraping unit after use, preventing secondary pollution caused by scraper accumulation. Thus, a fully automatic closed-loop operation of scraping cleaning, accurate measurement, and scraper self-cleaning is achieved without the need for an additional independent drive source. 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] See the attached diagram.

[0018] Figure 1 This is an overall schematic diagram of an automatic milling machine for mold steel according to this application.

[0019] Figure 2 for Figure 1 A partial structural diagram.

[0020] Figure 3 for Figure 2 A partial structural diagram.

[0021] Figure 4 for Figure 3 A magnified structural diagram at point A.

[0022] Figure 5 for Figure 1 A partial structural diagram.

[0023] Figure 6 for Figure 5 A magnified structural diagram at point B.

[0024] Figure 7 for Figure 5 Schematic diagram of the middle-side pusher assembly.

[0025] Figure 8 for Figure 7 A partial structural diagram.

[0026] Figure 9 for Figure 8 A magnified structural diagram at point C.

[0027] Figure 10 for Figure 7 A partial structural diagram.

[0028] Figure 11 for Figure 10 A magnified structural diagram at point D.

[0029] Figure 12 for Figure 11 Enlarged structural diagram at point E.

[0030] Figure label: 1. Machine tool base; 11. Main platform; 12. Guide rail; 13. First moving slide; 14. Lead screw nut seat; 15. Drive component; 16. Drive lead screw; 17. Slider; 18. First telescopic protective cover; 19. Mounting cover; 110. Rotary table; 111. Drive motor; 112. Synchronous belt transmission assembly; 2. Milling power assembly; 21. Side platform; 22. Second moving slide; 23. Second telescopic protective cover; 24. Spindle box; 25. Spindle motor; 26. Milling cutter head; 3. Clamping assembly; 31. Gantry frame; 32. Top crossbeam; 33. Top pressure cylinder; 4. Side push assembly; 41. Fixed housing; 42. Centering cylinder; 43. Side push plate; 44. Guide rod; 45. Telescopic cylinder; 46. 461. Stylus connector; 5. Workpiece stylus; 6. CNC control box; 7. Sweeping arm assembly; 61. Main sleeve rod; 601. Annular flange; 602. Compression spring; 62. Pressing part; 621. Inclined surface; 63. Clamp seat; 64. Guide frame; 65. Support spring; 66. Sliding block; 67. Contact rod; 68. Side ear plate; 69. Contact pulley; 610. Scraper seat; 611. Clearance groove; 612. Cleaning end; 613. Inclined through groove; 7. Air blowing assembly; 71. Support seat; 72. Fixed tube; 73. Air jet rod; 731. Air jet groove; 732. Drive gear; 733. Pipe connector; 734. Stop bar; 74. Fixed bracket; 75. Drive rack; 76. Dustproof box; 761. Waist groove. Detailed Implementation

[0031] 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.

[0032] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Reference Figures 1-12 As shown, this embodiment of the invention provides an automatic milling processing equipment for mold steel, which mainly includes a machine tool base 1, a first linear motion module, a rotary assembly, a milling power assembly 2, a clamping assembly 3, a side push assembly 4, a CNC operation box 5, a sweeping arm assembly 6, and an air blowing assembly 7. The CNC operation box 5 is fixed on the side of the machine tool base 1.

[0034] like Figures 1-5As shown, a first linear motion module is provided on the machine tool base 1, which is used to realize the axial feed (X-axis movement) of the workpiece. Specifically, a main platform 11 is fixed on the machine tool base 1. Two parallel guide rails 12 are symmetrically arranged on the upper surfaces of both sides of the main platform 11. A slider 17 is provided at the bottom of the first moving slide 13. The first moving slide 13 is slidably engaged with the guide rails 12 through the slider 17. A horizontally arranged drive screw 16 is connected to the bearing inside the main platform 11. A drive component 15 is fixed at one end of the main platform 11. The drive component 15 is preferably a servo motor. The drive component 15 is connected to one end of the drive screw 16 to provide rotational power.

[0035] The bottom of the first movable slide 13 is fixed with a lead screw nut seat 14, which is in transmission cooperation with the drive lead screw 16, thereby converting the rotational motion of the drive lead screw 16 into the linear movement of the slide. In order to prevent chips from damaging the precision transmission components, the front and rear ends of the first movable slide 13 are respectively connected with a first telescopic protective cover 18. The other end of the first telescopic protective cover 18 is fixed to both ends of the main platform 11 to form a fully enclosed protection.

[0036] Reference Figure 3 and Figure 4 As shown, a rotary assembly is provided on the first movable slide 13 for driving the workpiece to perform angular indexing. The rotary assembly includes a mounting cover 19 fixed on the first movable slide 13. The mounting cover 19 is hollow inside, and a drive motor 111 (such as a high-precision geared motor) is fixedly installed inside the mounting cover 19. A rotary table 110 is rotatably arranged on the top of the mounting cover 19. The rotary table 110 is used to carry the mold steel workpiece. A synchronous belt drive assembly 112 is connected between the output shaft of the drive motor 111 and the rotation shaft of the rotary table 110. The synchronous belt drive assembly 112 includes a driving pulley, a driven pulley, and a synchronous belt. Through the flexible transmission of the synchronous belt drive assembly 112, both rotational accuracy and impact vibration during milling can be guaranteed, realizing multi-face automatic reversing processing of the workpiece.

[0037] like Figure 3 As shown, in order to fix the workpiece during heavy milling, a clamping assembly 3 is also provided on the first moving slide 13. The clamping assembly 3 adopts a gantry structure, which includes a gantry frame 31 that spans across and is fixed on the first moving slide 13. The gantry frame 31 moves synchronously with the first moving slide 13. A top crossbeam 32 is provided on the top of the gantry frame 31. A top pressure cylinder 33 is vertically fixed downward on the top crossbeam 32. When the workpiece is placed and positioned, the telescopic rod of the top pressure cylinder 33 extends downward and applies vertical pressure to the workpiece (mold steel) from the top. In conjunction with the rotary table 110 at the bottom, the workpiece is firmly clamped to prevent the workpiece from tipping over or vibrating due to the lateral milling force.

[0038] like Figures 2-5 As shown, two sets of milling power assemblies 2 are symmetrically arranged on both sides of the machine tool base 1 for simultaneously milling the two symmetrical sides of the workpiece. The milling power assembly 2 mainly consists of a second linear motion module that provides feed motion and a milling unit that performs cutting. Specifically, the second linear motion module includes a side platform 21 as a mounting base. The side platform 21 is horizontally fixed on the side wall of the machine tool base 1 and extends in a direction perpendicular to the first linear motion module (i.e., the Y-axis direction). A slide rail is provided on the upper surface of the side platform 21. The second moving slide 22 is slidably disposed on the side platform 21 and driven by an internal screw transmission mechanism to realize reciprocating feed motion on the side platform 21. To protect against chips, a second telescopic protective cover 23 is connected between the two ends of the second moving slide 22 and the side platform 21.

[0039] The milling unit includes a spindle box 24 fixedly mounted on a second movable slide 22 and moving synchronously with the second movable slide 22. A spindle motor 25 is mounted on the second movable slide 22 and is connected to the spindle box 24 for driving the spindle inside the spindle box 24 to rotate. A milling cutter disc 26 is fixed to the output shaft at the front end of the spindle box 24. During operation, the depth of the milling cutter disc 26 into the workpiece can be precisely adjusted by controlling the displacement of the second movable slide 22 on the side platform 21.

[0040] like Figures 5-8 As shown, each group of second moving slides 22 is equipped with a side push assembly 4. The side push assembly 4 integrates the dual functions of centering and measurement. The centering unit includes a centering cylinder 42 that is fixed in the fixed housing 41 and horizontally arranged. The telescopic end of the centering cylinder 42 extends out of the fixed housing 41 and is connected to a side push plate 43. A guide rod 44 is fixed on the side of the side push plate 43. The guide rod 44 moves through the housing to ensure smooth movement. Before the workpiece is clamped, the centering cylinders 42 on both sides act simultaneously, driving the side push plate 43 to extend and push the side of the workpiece so that it automatically positions itself at the geometric center of the rotary table 110.

[0041] The drive unit includes telescopic cylinders 45 arranged in parallel within the fixed housing 41. The telescopic end of the telescopic cylinder 45 is connected to a probe connector 46. A high-precision workpiece probe 461 (usually a ruby ​​probe) is fixed to the front end of the probe connector 46. In the default state, the workpiece probe 461 is retracted into the fixed housing 41. During measurement, the telescopic cylinder 45 drives the probe connector 46 to extend, so that the workpiece probe 461 contacts the workpiece surface to collect coordinate data.

[0042] like Figures 5 to 12As shown, in order to solve the problem of interference from oil film and iron filings during measurement, a sweeping arm assembly 6 is fitted on the probe connector 46. The sweeping arm assembly 6 achieves automatic scraping before measurement through mechanical linkage. The sweeping arm assembly 6 includes a pushing unit and a scraping unit.

[0043] The pushing unit includes a main sleeve 61 movably sleeved on one end of the probe connecting seat 46. The main sleeve 61 has a hollow tubular structure and can be relatively displaced along the axial direction of the probe connecting seat 46. An inwardly extending annular flange 601 is integrally fixed at the front end of the main sleeve 61. A compression spring 602 is provided in the internal space of the main sleeve 61. The compression spring 602 is coaxially sleeved on the outside of the workpiece probe 461 (without contacting the probe). One end of the compression spring 602 abuts against the inner side wall of the annular flange 601, and the other end abuts against the end face of the probe connecting seat 46. Through the elastic force of the compression spring 602, the main sleeve 61 always maintains the tendency to extend forward (cover the probe).

[0044] Two pressing members 62 are fixed symmetrically along the axis of the probe connecting seat 46. Each pressing member 62 has a backward inclined surface 621. Two symmetrical guide frames 64 are fixed on the outer wall of the main sleeve rod 61 by a clamp seat 63. A sliding block 66 is vertically slidably arranged in each guide frame 64. A support spring 65 is provided on the bottom surface inside the guide frame 64. The top of the support spring 65 is connected to the sliding block 66. The sliding block 66 is adapted to move vertically along the guide frame 64. In the default state, the support spring 65 pushes the sliding block 66 upward. A contact rod 67 extending outward is fixed on each sliding block 66. The upper end surface of the contact rod 67 is adapted to maintain abutment with the inclined surface 621 of the pressing member 62.

[0045] The scraping unit includes side ear plates 68 connected below the two sliding blocks 66 to integrate the actions of both sides. A contact pulley 69 is mounted on the side of the side ear plate 68, adapted to contact the workpiece surface. A scraper seat 610 is fixed at the bottom of the side ear plate 68. The scraper seat 610 has an outwardly inclined cleaning end 612, typically made of oil-resistant rubber or polyurethane, used to physically scrape away cutting fluid and debris from the workpiece surface contacted by the workpiece probe 461. To prevent interference, a clearance groove 611 is provided on the side ear plate 68 for the workpiece probe 461 to pass through. Furthermore, the scraper seat 610 also has an inclined through-slot 613, which serves as an airflow channel for the air blowing assembly 7.

[0046] When the telescopic cylinder 45 drives the probe connecting seat 46 to extend towards the workpiece, the main sleeve 61 moves forward synchronously with the probe connecting seat 46 under the action of the compression spring 602. When the contact pulley 69 first touches the workpiece surface, the main sleeve 61 is blocked and stops axial displacement. At this time, the flexible cleaning end 612 is already in contact with the workpiece surface. As the telescopic cylinder 45 continues to push, the internal probe connecting seat 46 continues to extend forward over the spring resistance. During this process, the pressing part 62 fixed on the probe connecting seat 46 moves forward accordingly, and its inclined surface 621 gradually pushes the contact rod 67, converting the axial thrust into a vertical component force, forcing the sliding block 66 to drive the scraper seat 610 to move vertically downward along the guide frame 64. This action causes the cleaning end 612 to generate a scraping displacement on the workpiece surface, effectively removing oil film and iron filings. At the same time, the workpiece probe 461 extends through the relief groove 611 and accurately contacts the metal surface that has just been scraped clean by the cleaning end 612 for measurement, thus realizing the automated operation of scraping first and then measuring.

[0047] like Figure 9 and Figure 10 As shown, in order to prevent the accumulation of oil stains on the inner side of the cleaning end 612 due to long-term operation and thus affect the cleaning effect, an air blowing component 7 is also connected to the scraping unit. The air blowing component 7 automatically triggers the air circuit to open by the displacement of the scraper seat 610, so as to achieve self-cleaning.

[0048] Specifically, a fixed bracket 74 is fixedly installed on the side of the main sleeve rod 61, and a dustproof box 76 is fixed at the end of the fixed bracket 74. Through waist grooves 761 are opened on both sides of the dustproof box 76, and a drive rack 75 is fixed on one side of the inner wall of the dustproof box 76. The drive rack 75 consists of a smooth upper section (toothless part) and a toothed lower section (toothed part).

[0049] Two support seats 71 are symmetrically fixed on the scraper seat 610. A hollow fixed tube 72 is fixedly connected between the two support seats 71. A long strip-shaped vent groove (not shown in the figure) is opened near the bottom surface of the fixed tube 72. An air jet rod 73 is rotatably installed inside the fixed tube 72. A reset torsion spring (not shown in the figure) is connected between the air jet rod 73 and the fixed tube 72. One end of the reset torsion spring is fixedly connected to the fixed tube 72, and the other end is fixedly connected to the air jet rod 73. It is used to drive the air jet rod 73 to rotate back and reset after the driving force disappears.

[0050] Furthermore, one end of the jet rod 73 extends through the waist groove 761 into the dust box 76. A drive gear 732 is fixedly fitted at the extended end. An elongated jet groove 731 is also formed on the jet rod 73. In the initial state, the jet groove 731 is misaligned with the vent groove on the fixed tube 72. The width of the vent groove on the fixed tube 72 is greater than the width of the jet groove 731, so that within a certain range of rotation of the jet rod 73, the airflow can sequentially pass through the jet groove 731, the vent groove, and the inclined through groove 613 and blow towards the inner surface of the cleaning end 612 (i.e., the scraping position). In addition, a pipe connector 733 is fixed at the end of the jet rod 73 that extends out of the dust box 76. The pipe connector 733 is suitable for connecting to an external air source. A baffle 734 is fixed at the bottom of the jet rod 73 and extends vertically along the dust box 76. The width of the baffle 734 is greater than the width of the waist groove 761.

[0051] When the scraper seat 610 is driven by the pressure member 62 to drive the jet rod 73 to produce vertical displacement, in the initial stage of movement, the drive gear 732 slides along the smooth section of the drive rack 75. At this time, the gear does not rotate, the jet groove 731 and the ventilation groove remain misaligned, and the air passage is closed to avoid air leakage or interference with measurement during the scraping process. When the scraper seat 610 moves down to the point where the drive gear 732 meshes with the tooth block section of the drive rack 75, as it continues to move, the drive rack 75 drives the gear 732 to drive the jet rod 73 to rotate against the resistance of the torsion spring. At this time, the jet groove 731 rotates to connect with the ventilation groove, and the external high-pressure gas is released instantly. The airflow passes through the inclined through groove 613 on the scraper seat 610 and blows towards the inner wall of the cleaning end 612, peeling off and blowing away the dirt and debris that has just been scraped off, thus achieving automatic cleaning.

[0052] When the workpiece probe 461 retracts and the device resets, the jet rod 73 reverses and resets under the action of the torsion spring, and the air passage is closed. During the entire lifting process, the baffle 734 covers and shields the outside of the waist groove 761, forming a follow-up sealing structure, which effectively prevents external cutting fluid and iron filings from entering the dust box 76 through the waist groove 761 and causing the gear mechanism to jam.

[0053] Working Principle: At the start of operation, the mold steel workpiece is placed on the rotary table 110 of the first linear motion module. First, the side push components 4 on both sides operate simultaneously, and the centering cylinder 42 drives the side push plate 43 to extend, pushing the side of the workpiece to automatically center it to the geometric center position of the rotation center. Subsequently, the clamping component 3 operates, and the top pressure cylinder 33 presses down to cooperate with the rotary table 110 to firmly clamp the workpiece. The CNC system controls the first moving slide 13 to move along the X-axis, sending the workpiece into the processing area. At the same time, it controls the milling power components 2 on both sides to operate, and the second moving slide 22 feeds along the Y-axis to the set depth of cut. The spindle motor 25 drives the milling cutter head 26 to rotate at high speed, performing heavy-duty milling on the two symmetrical sides of the workpiece simultaneously. After completing the processing of a pair of sides, the rotary component drives the workpiece to rotate 90 degrees (or a specified angle), and the above process is repeated until the roughing and finishing of all sides are completed.

[0054] When dimensional inspection is required before or after finishing, the first moving slide 13 moves the workpiece to the measuring station. The telescopic cylinder 45 in the side push assembly 4 is activated, pushing the probe connecting seat 46 to extend towards the workpiece surface. During this process, the sweeping arm assembly 6 sleeved on the probe connecting seat 46 moves accordingly. When the contact pulley 69 at the front end of the sweeping arm assembly 6 first contacts the workpiece surface and is obstructed, the flexible cleaning end 612 adheres to the workpiece. As the probe connecting seat 46 continues to extend, the internal mechanical linkage structure (the pressing part 62 pushes the contact rod 67) is triggered, forcing the scraper seat 610 to drive the cleaning end 612 to produce a vertical downward scraping action on the surface of the workpiece to be measured, physically scraping away the cutting fluid oil film and iron filings. Immediately afterwards, the workpiece probe 461 extends through the relief groove 611 and directly contacts the metal surface that has just been scraped clean to collect data, ensuring that the measurement results are not affected by oil stains, and realizing synchronous automation of cleaning first and then measuring.

[0055] When the scraper holder 610 performs a scraping action and generates vertical displacement, the air blowing component 7 linked to it is triggered. Near the end of the scraping stroke (i.e., when the cleaning end 612 has finished scraping and accumulated dirt), the drive gear 732 on the air jet rod 73 meshes with the tooth block of the drive rack 75 in the dust box 76, driving the air jet rod 73 to rotate and open the air passage. The external high-pressure gas is instantly ejected through the aligned air jet groove 731, the ventilation groove and the inclined through groove 613, and blown forcefully towards the inner wall of the cleaning end 612, peeling off and blowing off the scraped sludge and debris, achieving self-cleaning and preventing dirt accumulation from affecting the next use. After the measurement is completed, the telescopic cylinder 45 drives the workpiece probe 461 to retract, the sweeping arm component 6 is reset under the action of the spring, the air jet rod 73 is reversed under the action of the torsion spring to close the air passage, and the baffle 734 completely blocks and seals the waist groove 761, waiting for the next cycle.

[0056] 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 are within the scope of the present invention.

Claims

1. An automatic milling machine for mold steel, characterized in that, include Machine tool base (1); The first linear motion module is mounted on the machine tool base (1) and includes a first movable slide (13) for carrying the workpiece to move along the axial direction; A rotary assembly is disposed on the first movable slide (13) for driving the workpiece to rotate; a milling power assembly (2) is symmetrically disposed on both sides of the machine tool base (1), including a second linear motion module and a milling unit disposed on the second linear motion module; A clamping assembly (3) is disposed on the first movable slide (13) for clamping the workpiece; The side push assembly (4) is set on the second linear movement module and includes a fixed housing (41) and a centering unit and a measurement drive unit set on the fixed housing (41); The measurement drive unit includes a telescopic cylinder (45) and a probe connector (46) connected to its telescopic end. The probe connector (46) has a workpiece probe (461) fixed at its end. The sweeping arm assembly (6) is movably sleeved on the probe connecting seat (46) and includes a mutually cooperating push unit and a scraping unit, which is used to clean the surface of the workpiece to be tested before the workpiece probe (461) contacts the workpiece. An air-blowing assembly (7) is disposed on the scraping unit and is used to perform air-blowing self-cleaning on the scraping unit; The pushing unit includes a main sleeve (61), an annular flange (601), a compression spring (602), a pressing component (62), a clamp seat (63), a guide frame (64), a support spring (65), a sliding block (66), and a contact rod (67). The main sleeve (61) is movably sleeved on one end of the probe connecting seat (46) and is hollow inside. The annular flange (601) is integrally fixed on one end of the main sleeve (61). The compression spring (602) is located inside the main sleeve (61) and coaxially sleeved on the outside of the workpiece probe (461). Its two ends are respectively connected to the annular flange (601) and the probe connecting seat (46). Two pressing members (62) are symmetrically arranged along the axis of the probe connecting seat (46) and are fixed to the surface of the probe connecting seat (46). The pressing member (62) has an inclined surface (621). The clamp seat (63) is fixedly sleeved on the main sleeve rod (61). Two guide frames (64) are symmetrically arranged and fixed on both sides of the clamp seat (63). The sliding block (66) is vertically slidably arranged in the guide frame (64). The support spring (65) is arranged on the bottom surface inside the guide frame (64) and its other end is connected to the bottom surface of the sliding block (66). The contact rod (67) is fixed on the sliding block (66) and is suitable for contacting and cooperating with the inclined surface (621) of the pressing member (62). The scraping unit includes a side ear plate (68), a contact pulley (69), a scraper seat (610), a clearance groove (611), a cleaning end (612), and an inclined through groove (613). The side ear plate (68) is connected between one end of the two contact rods (67). The contact pulley (69) is fixed to the side of the side ear plate (68) and is suitable for contacting the workpiece surface. The scraper seat (610) is fixed to the bottom of the side ear plate (68) and has an outwardly inclined end structure. The cleaning end (612) is located at the end of the scraper seat (610) and is used to physically scrape foreign objects off the workpiece surface. The clearance groove (611) is opened on the side ear plate (68) for the workpiece probe (461) to pass through. The inclined through groove (613) is opened on the scraper seat (610) and is used to guide the airflow to the cleaning position inside the cleaning end (612) that contacts the workpiece.

2. The automatic milling equipment for mold steel according to claim 1, characterized in that: The air blowing assembly (7) includes a support base (71), a fixed tube (72), an air jet rod (73), a fixed bracket (74), a dust box (76), and a waist groove (761). The fixed bracket (74) is fixed to the side of the main sleeve rod (61), and the dust box (76) is fixed to the side of the fixed bracket (74). The waist groove (761) is opened through the two side walls of the dust box (76) to allow one end of the air jet rod (73) to slide vertically. The support base (71) is symmetrically arranged on the scraper seat (610). The fixed tube (72) is fixed at both ends between the two support bases (71), is hollow, and has a ventilation groove near the bottom. The air jet rod (73) is rotatably arranged inside the fixed tube (72) and is connected to the fixed tube (72) by a torsion spring. One end of the air jet rod (73) extends through the waist groove (761) into the dust box (76).

3. The automatic milling equipment for mold steel according to claim 2, characterized in that: The air blowing assembly (7) also includes an air jet groove (731), a drive gear (732), and a drive rack (75). The drive rack (75) is fixed to one side of the inner wall of the dust box (76) and consists of an upper smooth section and a lower toothed section. The drive gear (732) is fixedly sleeved on one end of the air jet rod (73) that extends into the dust box (76) and is adapted to mesh with the drive rack (75) when the sliding block (66) drives the scraper seat (610) to move vertically. The air jet groove (731) is opened on the air jet rod (73) and is initially misaligned with the ventilation groove on the fixed tube (72). The width of the air jet groove (731) is smaller than the width of the ventilation groove.

4. The automatic milling equipment for mold steel according to claim 3, characterized in that: The air blowing assembly (7) also includes a pipe connector (733) and a baffle (734). The pipe connector (733) is fixed to one end of the air jet rod (73) that extends out of the dust box (76) and is suitable for connection with an external air supply device. The baffle (734) is fixed to the bottom surface of one end of the air jet rod (73) that extends out of the fixed pipe (72) and extends vertically along the dust box (76). The width of the baffle (734) is greater than the width of the waist groove (761).

5. The automatic milling equipment for mold steel according to claim 1, characterized in that: The centering unit includes a centering cylinder (42), a side push plate (43), and a guide rod (44). The centering cylinder (42) is horizontally fixed inside the fixed housing (41). The side push plate (43) is fixed at the telescopic end of the centering cylinder (42) and is located outside the fixed housing (41). The guide rod (44) is fixed to the side of the side push plate (43) and is movably installed through the end of the fixed housing (41).

6. The automatic milling equipment for mold steel according to claim 1, characterized in that: The clamping assembly (3) includes a gantry frame (31), a top crossbeam (32), and a top pressure cylinder (33). The gantry frame (31) is fixed on the first movable slide (13). The top crossbeam (32) is located on the top of the gantry frame (31). The top pressure cylinder (33) is vertically fixed on the top crossbeam (32). The telescopic end of the top pressure cylinder (33) is set downwards and is used to apply clamping force to the workpiece steel from the top.

7. The automatic milling equipment for mold steel according to claim 1, characterized in that: The first linear motion module also includes a main platform (11), a guide rail (12), a lead screw nut seat (14), a drive component (15), a drive lead screw (16), a slider (17), and a first telescopic protective cover (18). The guide rail (12) is symmetrically arranged on the upper surfaces of both sides of the main platform (11). The first movable slide (13) is slidably arranged on the guide rail (12) through the slider (17). The drive lead screw (16) is connected to the main platform (11) in a horizontal bearing configuration. The lead screw nut seat (14) is fixed to the bottom of the first movable slide (13) and is in transmission cooperation with the drive lead screw (16). The drive component (15) is fixed to one end of the main platform (11) and connected to one end of the drive lead screw (16). The first telescopic protective cover (18) is connected to both ends of the first movable slide (13), and the other end is connected to both ends of the main platform (11).

8. The automatic milling equipment for mold steel according to claim 1, characterized in that: The second linear motion module includes a side platform (21), a second movable slide (22), and a second telescopic protective cover (23). The side platform (21) is fixed on the machine tool base (1). The second movable slide (22) is slidably disposed on the side platform (21). The second telescopic protective cover (23) is connected to both sides of the second movable slide (22), and its two ends are respectively connected to the two ends of the side platform (21). The milling unit includes a spindle box (24), a spindle motor (25), and a milling cutter disc (26). The spindle box (24) is fixed on the second movable slide (22). The spindle motor (25) is fixed on the second movable slide (22) and its output end is connected to the spindle box (24). The milling cutter disc (26) is fixed to the output end of the spindle box (24).

Images