Gantry type combined machining center for multi-surface milling of die-casting box body

Abstract

The invention provides a gantry type combined machining center for multi-surface milling of a die-casting box. Relates to the technical field of machining equipment. The gantry type combined machining center for multi-face milling of the die-casting box comprises a portal frame, discharging openings are formed in the two sides of the portal frame, first telescopic air cylinders are fixedly installed on the outer walls of the two sides of the portal frame, and the same workpiece table is fixedly installed on output shafts of the first telescopic air cylinders; two discharging ports are formed in the portal frame, the workpiece table penetrates through the two discharging ports and does not make contact with the inner walls of the discharging ports, a reversing disc is arranged in the portal frame, a connecting disc is arranged below the reversing disc, a plurality of mounting frames distributed in an annular array are fixedly mounted at the bottom of the connecting disc, and milling mechanisms are arranged in the mounting frames; the milling machine is used for milling a workpiece. According to the invention, one-time clamping multi-surface milling can be realized, the tool changing speed is high, and the working efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a gantry-type composite machining center for multi-face milling of die-cast box bodies. Background Technology

[0002] Die-cast box-type parts are widely used in the automotive, aerospace, and engineering machinery industries. Their structures typically require machining on multiple surfaces and demand high precision, surface quality, and machining efficiency. Gantry machining centers are widely used for machining large box-type parts due to their advantages such as high rigidity, large machining range, and strong stability.

[0003] However, existing gantry machining centers used for die-casting box machining still have many shortcomings in multi-face milling operations: First, traditional gantry machining centers are mostly single-spindle structures, and can only complete the milling of a single surface in one clamping. For multi-face machining of die-casting boxes, multiple clamping and positioning are required, which not only increases auxiliary machining time and reduces machining efficiency, but also easily causes cumulative errors due to multiple positioning, affecting machining accuracy; Second, existing gantry machining centers can only fix one type of milling tool. When different milling tools are needed to machine different milling surfaces, the machine needs to be stopped for tool changing, and the entire tool changing time is long, reducing work efficiency and increasing the difficulty of manual operation for operators.

[0004] Therefore, it is necessary to provide a new gantry-type composite machining center for multi-face milling of die-cast box bodies to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a gantry-type composite machining center for multi-face milling of die-cast box bodies, which can achieve multi-face milling in one clamping, fast tool changing speed, and high working efficiency.

[0006] To solve the above technical problems, the present invention provides a gantry-type composite machining center for multi-face milling of die-casting boxes, comprising: a gantry frame, with feeding ports on both sides of the gantry frame; a first telescopic cylinder fixedly installed on the outer walls of both sides of the gantry frame; a workpiece table fixedly installed on the output shaft of the first telescopic cylinder; the workpiece table passing through the two feeding ports but not contacting the inner walls of the feeding ports; a reversing disk inside the gantry frame; a connecting disk below the reversing disk; and multiple mounting frames arranged in a circular array fixedly installed at the bottom of the connecting disk, each of the mounting frames containing a milling mechanism for milling the workpiece; an electric slide rail fixedly installed on the top of the gantry frame; a moving stage fixedly installed on the slide plate of the electric slide rail; a hollow cylinder rotatably mounted on the moving stage; the hollow cylinder being slidably connected to the top of the gantry frame; and a [missing information - likely a specific component or feature] inside the hollow cylinder. A lifting screw is provided, the bottom end of which extends to the bottom of the hollow cylinder and is fixedly connected to the reversing disc. Two limiting rods are fixedly installed on the top of the reversing disc, the top ends of which pass through the moving table and are slidably connected thereto. The lifting screw is threadedly connected to the bottom of the hollow cylinder. A cooling mechanism is provided on the moving table to cool the processing points. A position moving mechanism is provided inside the gantry frame to move the die-casting box laterally and longitudinally. The position moving mechanism is provided with two first rodless cylinders. Mounting plates are fixedly installed on the sliders of the two first rodless cylinders. Rotating shafts are rotatably installed on the mounting plates. Main C-shaped frames are fixedly installed at the ends of the two rotating shafts that are close to each other. Rotating seats are rotatably installed inside the two main C-shaped frames. Clamping mechanisms are fixedly installed on the sides of the two rotating seats that are close to each other to clamp the die-casting box.

[0007] Furthermore, a connecting frame is provided below the workpiece stage, and a double-ended screw is rotatably installed inside the connecting frame. Two transverse clamping bars are threaded onto the double-ended screw. Multiple balls are embedded on the side of the two transverse clamping bars that are close to each other. The tops of the two transverse clamping bars extend to the top of the workpiece stage and are slidably connected to the workpiece stage. A first clamping motor is fixedly installed on one outer wall of the connecting frame. The output shaft of the first clamping motor is fixedly connected to one end of the double-ended screw. Two folding plates are fixedly installed at the bottom of the workpiece stage. A retraction cylinder is fixedly installed on the inner wall of the bottom of the two folding plates. The same stabilizing plate is fixedly installed on the output shaft of the two retraction cylinders. The stabilizing plate is fixedly connected to the bottom of the connecting frame, which can drive the connecting frame to descend as a whole, so that the transverse clamping bars do not protrude from the top of the workpiece stage.

[0008] Furthermore, an annular guide rail is fixedly installed at the bottom of the reversing disc, and four guide blocks are slidably installed on the annular guide rail. The bottoms of the four guide blocks are all fixedly connected to the connecting disc. Each of the multiple milling mechanisms includes a milling motor. The multiple milling motors are respectively fixedly installed in the multiple mounting frames. Connectors are rotatably installed at the bottom of the multiple mounting frames. The output shafts of the multiple milling motors are respectively fixedly connected to the tops of the multiple connectors. The bottom ends of the multiple connectors are provided with mounting grooves. Milling cutters are fixedly installed in the multiple mounting grooves by bolts. One of the milling mechanisms is located directly above the workpiece table.

[0009] Furthermore, the cooling mechanism includes a water pump, which is fixedly installed on the top of the movable platform. One end of a bellows is fixedly installed on the water outlet of the water pump, and a connecting rigid pipe is fixedly installed on the other end of the bellows. A nozzle is fixedly installed at the bottom end of the connecting rigid pipe. The nozzle is located on one side of the milling mechanism directly above the workpiece table. A stabilizing arm is fixedly installed on the reversing disc, and the connecting rigid pipe passes through the stabilizing arm and is fixedly connected to it.

[0010] Furthermore, the outer ring wall of the connecting disc is provided with a plurality of reversing slots arranged in a circular array. The plurality of reversing slots are adapted to a plurality of mounting frames. A square slide rod is fixedly installed on the reversing disc. A translation block is slidably installed on the square slide rod. A directional clamp is fixedly installed at the bottom of the translation block. The bottom end of the directional clamp is inserted into one of the reversing slots and fits against its inner wall. A baffle is fixedly installed at the end of the square slide rod. A top spring is sleeved on the square slide rod. The two ends of the top spring are fixedly connected to the baffle and the translation block, respectively.

[0011] Furthermore, a rotary motor is fixedly installed on the top of the mobile platform, and gears are fixedly sleeved on both the output shaft of the rotary motor and the hollow cylinder, with the two gears meshing with each other.

[0012] Furthermore, the position moving mechanism includes a longitudinal double-sided support, which is fixedly installed inside the gantry frame. A longitudinal moving screw is rotatably installed inside the longitudinal double-sided support. A longitudinal moving motor is fixedly installed on one outer wall of the longitudinal double-sided support. The output shaft of the longitudinal moving motor is fixedly connected to one end of the longitudinal moving screw. A longitudinal slide is threaded onto the longitudinal moving screw. A transverse double-sided support is fixedly installed on the top of the longitudinal slide. A transverse moving screw is rotatably installed inside the transverse double-sided support. A transverse moving motor is fixedly installed on the outer wall of one end of the transverse double-sided support. The output shaft of the transverse moving motor is fixedly connected to one end of the transverse moving screw. A transverse slide is threaded onto the transverse moving screw. A support platform is fixedly installed on the top of the transverse slide. The bottoms of the two first rodless cylinders are both fixedly connected to the support platform.

[0013] Furthermore, a first steering motor is fixedly installed on each of the two mounting plates on opposite sides. The output shafts of the two first steering motors are fixedly connected to opposite ends of the two rotating shafts. A central shaft is rotatably installed inside each of the two main C-shaped frames. The two central shafts pass through the two rotating seats and are fixedly connected to the corresponding rotating seats. A second steering motor is fixedly installed on one outer wall of each of the two main C-shaped frames. The output shafts of the two second steering motors are fixedly connected to one end of the two central shafts.

[0014] Furthermore, both clamping mechanisms include a secondary C-shaped frame, which is fixedly connected to the two rotating seats respectively. Two second telescopic cylinders are fixedly installed inside each of the two secondary C-shaped frames. Longitudinal clamping plates are fixedly installed on the output shafts of the four second telescopic cylinders. A third telescopic cylinder is fixedly installed on the inner wall of the two secondary C-shaped frames on the side away from each other. A base plate is fixedly installed on the output shaft of each of the two third telescopic cylinders.

[0015] Furthermore, an external support is fixedly installed on one side of the outer wall of the gantry frame. A second rodless cylinder is provided below the external support, and a fourth telescopic cylinder is fixedly installed on the top of the external support. The output shaft of the fourth telescopic cylinder passes through the external support and is fixedly connected to the second rodless cylinder. The output shaft of the fourth telescopic cylinder is slidably connected to the external support. A bearing arm is fixedly installed on the slider of the second rodless cylinder. Two portal frames are fixedly installed at the bottom of the bearing arm. The size of the portal frames is smaller than the inner wall size of the discharge port. Two fifth telescopic cylinders are fixedly installed in each of the two portal frames. Clamping plates are fixedly installed on the output shafts of the four fifth telescopic cylinders. A belt-type feeding unit and a belt-type discharging unit are respectively provided on both sides of the gantry frame. The belt-type feeding unit is adapted to the portal frame away from the gantry frame, and the belt-type discharging unit is adapted to the portal frame close to the gantry frame.

[0016] Compared with related technologies, the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention has the following beneficial effects:

[0017] I. This invention uses a two-sided clamping mechanism to cross-clamp the workpiece and drive it to flip through a first steering motor and a second steering motor. This allows for the complete milling of the entire circumference and left and right end faces of the die-casting box without multiple clamping operations. This avoids the cumulative errors caused by multiple positioning operations, reduces clamping auxiliary time, and significantly improves processing efficiency.

[0018] II. By utilizing the cooperative structure of the reversing disc, connecting disc, directional chuck and reversing slot, and with the elastic reset effect of the top spring, the present invention can quickly complete the switching of different milling mechanisms without the need for a complicated stop-and-change tool process, shortening auxiliary operation time and adapting to the diverse milling needs of different surfaces of the die-cast box.

[0019] Third, this invention achieves lateral centering of the workpiece through the transverse clamping bar and longitudinal centering through the longitudinal clamping plate. Combined with the transverse and longitudinal moving motors, the workpiece is driven to move precisely, ensuring accurate milling points. At the same time, the bottom support plate enhances the stability during the machining of the left and right end faces and reduces the impact of vibration on the surface quality of the machined surface. Attached Figure Description

[0020] Figure 1 A front view schematic diagram of the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0021] Figure 2 A schematic diagram of the oblique upward view of the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0022] Figure 3This is a schematic diagram of the assembly of the electric slide rail and the moving table in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention.

[0023] Figure 4 A schematic diagram of the connection structure between the water pump and the bellows in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0024] Figure 5 A schematic diagram of the assembly structure of the reversing disk, connecting disk and mounting frame in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0025] Figure 6 This is a schematic diagram of the assembly of the square slide bar and translation block in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0026] Figure 7 A schematic diagram of the disassembled state of the connector and the milling cutter head in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0027] Figure 8 A schematic diagram of the connection structure between the reversing disk and the annular guide rail in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0028] Figure 9 This is a schematic diagram of the assembly of the workpiece table and the support table in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0029] Figure 10 This is a schematic diagram of the assembly of the workpiece table and the connecting frame in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0030] Figure 11 This is a schematic diagram of the assembly of the longitudinal double-sided support and the transverse double-sided support in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention.

[0031] Figure 12 A cross-sectional view of the workpiece table and connecting frame in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0032] Figure 13 A schematic diagram of the connection structure between the rotating seat and the auxiliary swivel frame in the first embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0033] Figure 14This is a front view schematic diagram of a second embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0034] Figure 15 A schematic diagram of the planar structure of the second embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention;

[0035] Figure 16 This is a schematic diagram of the assembly of the second rodless cylinder and the gantry frame in the second embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention.

[0036] Figure 17 This is a schematic diagram of the connection structure between the fifth telescopic cylinder and the clamping plate in the second embodiment of the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention.

[0037] The diagram labels are as follows: 1. Gantry frame; 2. Feed port; 3. First telescopic cylinder; 301. Workpiece table; 302. Connecting frame; 303. Double-ended screw; 304. Transverse clamping bar; 305. Retracting cylinder; 4. Reversing disc; 401. Connecting disc; 402. Mounting frame; 403. Milling motor; 404. Connector; 405. Milling cutter head; 5. Electric slide rail; 501. Moving table; 502. Hollow cylinder; 503. Lifting screw; 6. Water pump; 601. Corrugated pipe; 602. Connecting rigid pipe; 603. Nozzle; 7. Reversing slot; 701. Square slide bar; 702. Translation block; 703. Orientation clamp; 704. Top spring; 8. Longitudinal double-sided support; 801. Longitudinal moving screw; 802. Longitudinal slide; 803. Lateral double-sided support; 804. Lateral moving screw; 805. Lateral slide; 806. Bearing platform; 9. First rodless cylinder; 10. Mounting plate; 11. Rotating shaft; 12. Main C-shaped frame; 13. Rotating seat; 1301. Secondary C-shaped frame; 1302. Second telescopic cylinder; 1303. Longitudinal clamping plate; 14. Third telescopic cylinder; 15. Base plate; 16. External support; 17. Fourth telescopic cylinder; 18. Second rodless cylinder; 19. Bearing arm; 20. Portal frame; 21. Fifth telescopic cylinder; 22. Clamping plate; 23. Belt-type feeding unit; 24. Belt-type discharging unit. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] First embodiment:

[0040] Please refer to the following: Figures 1-13A gantry-type composite machining center for multi-face milling of die-cast box bodies includes: a gantry frame 1 with discharge ports 2 on both sides, and a first telescopic cylinder 3 fixedly installed on the outer walls of both sides of the gantry frame 1. A workpiece table 301 is fixedly installed on the output shaft of the cylinder 301, passing through the two discharge ports 2 without contacting the inner walls of the discharge ports 2. A reversing disk 4 is provided inside the gantry frame 1, and an annular guide rail is fixedly installed at the bottom of the reversing disk 4. Four guide blocks are slidably installed on the annular guide rail. A connecting disk 401 is fixedly installed at the bottom of the four guide blocks. Four guide blocks arranged in a circular array are fixedly installed at the bottom of the connecting disk 401. The four mounting frames 402 are distributed, and each of the four mounting frames 402 is equipped with a milling mechanism for milling the workpiece. Each of the four milling mechanisms includes a milling motor 403. The four milling motors 403 are fixedly installed in the four mounting frames 402 respectively. The bottom of each of the four mounting frames 402 is rotatably mounted with a connector 404. The output shafts of the four milling motors 403 are fixedly connected to the top of the four connectors 404 respectively. The bottom of each of the four connectors 404 is provided with a mounting groove. A milling cutter head 405 is fixedly installed in each of the four mounting grooves by bolts. One of the milling mechanisms is located directly above the workpiece table 301.

[0041] In this embodiment, to enable the milling mechanism to lift and lower, an electric slide rail 5 is fixedly installed on the top of the gantry 1. This electric slide rail 5 is a common electric moving component, which will not be described in detail here. A moving platform 501 is fixedly installed on the slide plate of the electric slide rail 5, and a guide rail is fixedly installed on the top of the gantry 1. A guide block is slidably mounted on the guide rail, and the top of the guide block is fixedly connected to the moving platform 501, providing support for the moving platform 501. A hollow cylinder 502 is rotatably mounted on the moving platform 501. The hollow cylinder 502 is slidably connected to the top of the gantry 1. This slidable connection is achieved by opening a long slot at the top of the gantry 1, through which the hollow cylinder 502 passes. A lifting screw 503 is provided inside the hollow cylinder 502. The bottom end of the lifting screw 503 extends below the hollow cylinder 502 and is fixedly connected to the reversing disc 4. Two limiting rods are fixedly installed on the top of the reversing disc 4, and the top ends of both limiting rods penetrate... The moving table 501 is slidably connected to it to achieve the limiting function. The lifting screw 503 is threadedly connected to the bottom of the hollow cylinder 502. In addition, a rotary motor is fixedly installed on the top of the moving table 501. Gears are fixedly sleeved on both its output shaft and the hollow cylinder 502. The two gears mesh with each other. By running the rotary motor, the hollow cylinder 502 can be rotated by the meshing of the two gears. A cooling mechanism is provided on the moving table 501 to cool the processing point. The cooling mechanism includes a water pump 6 fixedly installed on the top of the moving table 501. One end of the bellows 601 is fixedly installed on the water outlet of the water pump 6. A connecting hard pipe 602 is fixedly installed on the other end of the bellows 601. A nozzle 603 is fixedly installed at the bottom end of the connecting hard pipe 602. The nozzle 603 is located on one side of the milling mechanism directly above the workpiece table 301. A stabilizing arm is fixedly installed on the reversing disc 4. The connecting hard pipe 602 passes through the stabilizing arm and is fixedly connected to it.

[0042] In this embodiment, in order to adjust the milling points of the fixed die-casting box, a position moving mechanism is provided inside the gantry 1 to move the die-casting box laterally and longitudinally. This position moving mechanism includes a longitudinal double-sided support 8, which is fixedly installed inside the gantry 1. A longitudinal moving screw 801 is rotatably installed inside the longitudinal double-sided support 8. A longitudinal moving motor is fixedly installed on one outer wall of the longitudinal double-sided support 8, and its output shaft is fixedly connected to one end of the longitudinal moving screw 801. A longitudinal slide block 802 is threaded onto the longitudinal moving screw 801, and two longitudinal sliding rods are fixed inside the longitudinal double-sided support 8. Both longitudinal sliding rods penetrate the longitudinal... A transverse double-sided bracket 803 is fixedly installed on the top of the longitudinal slide block 802 and slidably connected thereto. A transverse moving screw 804 is rotatably installed inside the transverse double-sided bracket 803. A transverse moving motor is fixedly installed on the outer wall of one end of the transverse double-sided bracket 803, and its output shaft is fixedly connected to one end of the transverse moving screw 804. A transverse slide block 805 is threaded onto the transverse moving screw 804, and two transverse sliding rods are fixed inside the transverse double-sided bracket 803. Both transverse sliding rods pass through the transverse slide block 805 and are slidably connected thereto. A support platform 806 is fixedly installed on the top of the transverse slide block 805, and the bottoms of the two first rodless cylinders 9 are fixedly connected to the support platform 806.

[0043] In the above method, two first rodless cylinders 9 are provided on the position moving mechanism. Mounting plates 10 are fixedly mounted on the sliders of both first rodless cylinders 9. To improve the stability of the mounting plates 10 during movement, two stabilizing folding rods are fixed to the top of the support platform 806. These two stabilizing folding rods pass through the two mounting plates 10 and are slidably connected to the corresponding mounting plates 10. Rotating shafts 11 are rotatably mounted on both mounting plates 10. First steering motors are fixedly mounted on the opposite sides of the two mounting plates 10. The output shafts of the two first steering motors are fixedly connected to the opposite ends of the two rotating shafts 11. Main U-shaped frames 12 are fixedly mounted on the opposite ends of the two rotating shafts 11. Central shafts are rotatably mounted inside the two main U-shaped frames 12. Rotating seats 13 are fixedly sleeved on the two central shafts. Second steering motors are fixedly mounted on the outer walls of one side of each of the two main U-shaped frames 12. The output shafts of the two second steering motors are fixedly connected to one end of each of the two central shafts. The two rotating seats 13 are close to each other. Clamping mechanisms are fixedly installed on the nearest side to clamp the die-casting box. Each clamping mechanism includes a secondary C-shaped frame 1301, which is fixedly connected to two rotating seats 13. Two second telescopic cylinders 1302 are fixedly installed inside each secondary C-shaped frame 1301. Longitudinal clamping plates 1303 are fixedly installed on the output shafts of the four second telescopic cylinders 1302. Third extension plates are fixedly installed on the inner walls of the two secondary C-shaped frames 1301 on the sides furthest from each other. The output shafts of the two third telescopic cylinders 14 are all fixedly mounted with base plates 15. With the cooperation of the first steering motor and the second steering motor, the die-casting box can be flipped over, thereby speeding up the flipping speed. In addition, in order to eliminate the large deflection of the rotating shaft 11 due to the end gravity when rotating, a T-shaped annular groove is provided on the mounting plate 10. Two T-shaped sliders are provided in the T-shaped annular groove. Two force beams are fixed on the rotating shaft 11, and the ends of the two force beams are fixed to the two T-shaped sliders respectively.

[0044] In this embodiment, to center the die-casting box laterally, a connecting frame 302 is provided below the workpiece stage 301. A double-ended screw 303 is rotatably installed inside the connecting frame 302, and two transverse clamping bars 304 are threaded onto it. Multiple balls are embedded on the side of the two transverse clamping bars 304 that are close to each other. The tops of the two transverse clamping bars 304 extend above the workpiece stage 301 and slide to connect with the workpiece stage 301. This sliding connection is achieved by opening two slides on the top of the workpiece stage 301. The two transverse clamping bars 304 pass through the two slides respectively and contact the inner wall of the corresponding slide. Furthermore, a first clamping motor is fixedly installed on one side of the outer wall of the connecting frame 302, and its output shaft is fixedly connected to one end of the double-headed screw 303. Two folding plates are fixedly installed at the bottom of the workpiece table 301. A retraction cylinder 305 is fixedly installed on the inner wall of the bottom of the two folding plates. The same stabilizing plate is fixedly installed on the output shaft of the two retraction cylinders 305. The top of the stabilizing plate is fixedly connected to the bottom of the connecting frame 302, which can drive the connecting frame 302 to descend as a whole, so that the transverse clamping bar 304 does not protrude from the top of the workpiece table 301, thereby ensuring that the die-casting box is not interfered with by the transverse clamping bar 304 when it moves.

[0045] In this embodiment, in order to quickly switch the required milling cutter head 405, four reversing slots 7 arranged in a circular array are provided on the outer ring wall of the connecting disk 401. The four reversing slots 7 are respectively adapted to four mounting frames 402. A square slide rod 701 is fixedly installed on the reversing disk 4. A translation block 702 is slidably installed on the square slide rod 701. A directional chuck 703 is fixedly installed at the bottom of the translation block 702. The bottom end of the directional chuck 703 is inserted into one of the reversing slots 7 and fits against its inner wall. A baffle is fixedly installed at the end of the square slide rod 701. A top spring 704 is sleeved on the square slide rod 701. The two ends of the top spring 704 are fixedly connected to the baffle and the translation block 702 respectively. The milling cutter head 405 can be quickly switched by pulling the translation block 702 and rotating the connecting disk 401, thereby improving work efficiency.

[0046] In this embodiment:

[0047] In the initial state, the output shafts of the first telescopic cylinder 3 and the retracting cylinder 305 are both extended, and the water inlet port of the water pump 6 is connected to the external coolant tank through an external hose.

[0048] When it is necessary to mill the die-casting box, first place the die-casting box on the workpiece table 301 through the feeding port 2. Then, start the first clamping motor in the forward direction. Its output shaft drives the double-headed screw 303 to rotate. The two transverse clamping bars 304 move towards each other until the balls on the two transverse clamping bars 304 contact the two sides of the die-casting box respectively, thus completing the transverse centering positioning of the workpiece.

[0049] Then, one of the first rodless cylinders 9 is started, and its slider moves the corresponding mounting plate 10 toward the position of the die-casting box. Finally, the two corresponding longitudinal clamping plates 1303 are moved to the two sides of the die-casting box. Then, the output shafts of the two corresponding second telescopic cylinders 1302 are started to extend, and the two corresponding longitudinal clamping plates 1303 move closer to each other until the two longitudinal clamping plates 1303 contact the longitudinal sides of the die-casting box respectively, thus completing the longitudinal centering positioning of the workpiece. Then, the first clamping motor is started in reverse to separate the transverse clamping bar 304 from the workpiece. The output shaft of the retraction cylinder 305 is started to retract, so that the transverse clamping bar 304 descends and does not protrude from the top of the workpiece table 301. At this time, the initial position adjustment between the top surface of the die-casting box and the milling cutter head 405 above it is completed.

[0050] Subsequently, during milling, the position of the top surface of the die-casting box is adjusted according to the milling position. During adjustment, the rotary motor is first started, and the hollow cylinder 502 rotates through the meshing of two gears. Simultaneously, through the threaded engagement of the hollow cylinder 502 and the lifting screw 503, and under the limiting action of the limit rod, the reversing disc 4 begins to descend. When the milling mechanism, located directly above the workpiece, is about to contact the top surface of the workpiece, the rotary motor is turned off. Then, the transverse movement motor is started, and its output shaft drives the transverse movement screw 804 to rotate. The transverse slide 805 on it moves horizontally along with the support table 806 until it reaches the desired position. After the workpiece is positioned, the transverse movement motor is turned off, and the transverse milling point is adjusted. Then, the longitudinal movement motor is started, and its output shaft drives the longitudinal movement screw 801 to rotate. The longitudinal slide 802 on the screw moves longitudinally with the transverse double-sided support 803, and then moves longitudinally with the support table 806. Finally, the longitudinal movement motor is turned off after the workpiece is adjusted to the designated position. At this time, the milling cutter head 405 corresponds to the initial milling point. Then, the corresponding milling motor 403 is started, which drives the milling cutter head 405 to rotate. Then, the rotary motor is started, and the milling mechanism begins to descend, thus starting the milling operation.

[0051] In milling operations, the milling work can be completed smoothly by controlling the electric slide rail 5 and the transverse movement motor.

[0052] After one side of milling is completed, the output shaft of the first telescopic cylinder 3 is retracted to separate the workpiece table 301 from the workpiece. Then, the corresponding first steering motor is activated, and its output shaft drives the corresponding rotating shaft 11 to rotate, causing the workpiece to rotate along with it. When the workpiece rotates to the next milling surface, the first steering motor is turned off. At this time, one of the longitudinal clamping plates 1303 used to hold the workpiece is located below the milling cutter head 405. To move the longitudinal clamping plate 1303 out, another first rodless cylinder 9 is activated. Its slider drives the corresponding mounting plate 10 to move towards the workpiece, ultimately moving the two corresponding longitudinal clamping plates... 1303 moves to both sides of the workpiece, and then activates the corresponding two second telescopic cylinders 1302 to clamp the workpiece using the corresponding longitudinal clamping plates 1303. After that, the output shaft of the previously activated second telescopic cylinder 1302 retracts, so that the longitudinal clamping plates 1303 corresponding to the milling cutter head 405 are separated from the workpiece. Then, the previously activated first rodless cylinder 9 is activated to bring it back to its original position. At this time, there is no longer any obstruction between the workpiece surface to be machined and the milling cutter head 405. The output shaft of the first telescopic cylinder 3 can be activated again to extend, so that the workpiece table 301 contacts the bottom of the workpiece. Then, the milling work can continue to be performed in the above manner.

[0053] Then, this process is repeated. Each time the workpiece is flipped over, the clamping mechanisms on both sides are used to clamp the workpiece in a cross manner, so that each face can be milled smoothly. At the same time as the milling work, the water pump 6 is started to draw coolant and spray it out through the nozzle 603 to cool the milling point.

[0054] When milling is required on the left and right end faces of the workpiece, the corresponding second steering motor is activated, and its output shaft drives the corresponding rotating seat 13 to rotate. One end face of the workpiece gradually faces upward until it is completely facing upward. Then the second steering motor is turned off, and the corresponding first rodless cylinder 9 is activated to move the workpiece below the milling cutter head 405. Subsequently, the output shaft of the corresponding third telescopic cylinder 14 is activated to extend, causing the support plate 15 to rise and contact the bottom of the workpiece at this moment, forming a support effect. Then the milling work can continue. Similarly, when milling the other end face, another clamping mechanism is used to clamp the workpiece, and then the corresponding second steering motor is activated to flip the side of the workpiece to face upward. After the die-casting box is milled, the die-casting box is released and placed on the workpiece table 301, and then it can be taken out.

[0055] In subsequent use, when it is necessary to quickly change the corresponding milling mechanism, the translation block 702 can be pulled first to pull the directional chuck 703 out of the corresponding reversing slot 7. At this time, the top spring 704 is in a compressed state. Then, the connecting plate 401 is rotated. When the corresponding milling mechanism is rotated to the top of the workpiece table 301, the translation block 702 is released. The compressed top spring 704 releases its rebound force instantly and automatically brings the directional chuck 703 into the corresponding reversing slot 7, thereby completing the rapid switching of the milling mechanism.

[0056] Compared with related technologies, the gantry-type composite machining center for multi-face milling of die-cast box bodies provided by the present invention has the following beneficial effects:

[0057] I. This invention uses a two-sided clamping mechanism to cross-clamp the workpiece and drive it to flip through a first steering motor and a second steering motor. This allows for the complete milling of the entire circumference and left and right end faces of the die-casting box without multiple clamping operations. This avoids the cumulative errors caused by multiple positioning operations, reduces clamping auxiliary time, and significantly improves processing efficiency.

[0058] II. By utilizing the cooperative structure of the reversing disc 4, connecting disc 401, directional chuck 703 and reversing slot 7, and with the elastic reset effect of the top spring 704, the present invention can quickly complete the switching of different milling mechanisms without the need for a complicated stop-and-change tool process, shortening auxiliary operation time and adapting to the diverse milling needs of different surfaces of the die-cast box.

[0059] Third, the present invention achieves horizontal centering of the workpiece through the horizontal clamping bar 304 and vertical centering of the longitudinal clamping plate 1303. With the help of the horizontal moving motor and the vertical moving motor, the workpiece is driven to move accurately, ensuring the accuracy of the milling point. At the same time, the bottom support plate 15 improves the stability during the processing of the left and right end faces and reduces the impact of vibration on the surface quality of the processed surface.

[0060] Second embodiment:

[0061] Based on the gantry-type composite machining center for multi-face milling of die-casting boxes provided in the first embodiment of this application, the second embodiment of this application proposes another gantry-type composite machining center for multi-face milling of die-casting boxes. The second embodiment is merely a further embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0062] The second embodiment of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0063] Please refer to the following: Figures 14-17The gantry-type composite machining center for multi-face milling of die-cast box bodies also includes an external support platform 16. The external support platform 16 is fixedly installed on one side of the outer wall of the gantry frame 1. A second rodless cylinder 18 is provided below the external support platform 16, and a fourth telescopic cylinder 17 is fixedly installed on the top of the external support platform 16. The output shaft of the fourth telescopic cylinder 17 passes through the external support platform 16 and is fixedly connected to the second rodless cylinder 18. The output shaft of the fourth telescopic cylinder 17 is slidably connected to the external support platform 16. In addition, two guide columns are slidably installed on the external support platform 16, and the bottom ends of the two guide columns are fixedly connected to the second rodless cylinder 18. In order to improve the stability of the external support platform 16, two pillars are fixedly fixed at the bottom of the external support platform 16. A bearing arm 19 is fixedly installed on the slider of the second rodless cylinder 18, and two portal frames 20 are fixedly installed at the bottom of the bearing arm 19. The size of the portal frames 20 is smaller than that of the second rodless cylinder 18. The inner wall dimensions of the discharge port 2 are as follows: two fifth telescopic cylinders 21 are fixedly installed in each of the two portal frames 20; clamping plates 22 are fixedly installed on the output shafts of the four fifth telescopic cylinders 21; and single bars are fixedly installed in each of the two portal frames 20. The two single bars pass through the corresponding clamping plates 22 and are slidably connected to the corresponding clamping plates 22. In addition, in order to form soft protection for the die-casting box, protective pads are provided on the side of the corresponding two clamping plates 22 that are close to each other. Belt feeding unit 23 and belt discharging unit 24 are respectively provided on both sides of the gantry frame 1, thus forming a working mode of feeding and discharging at the same time. Both types of discharging units are common belt conveyor equipment on the market, which will not be described in detail here. Belt feeding unit 23 is adapted to the portal frame 20 away from the gantry frame 1, and belt discharging unit 24 is adapted to the portal frame 20 close to the gantry frame 1.

[0064] In this embodiment:

[0065] The belt feeder unit 23 can transport a large number of die-casting boxes, and the belt discharge unit 24 can transport the milled die-casting boxes to the next process. In the initial state, the belt feeder unit 23 is equipped with multiple die-casting boxes, and one of the die-casting boxes is located below the portal frame 20 away from the gantry 1.

[0066] After a die-casting box is milled, the output shaft of the fourth telescopic cylinder 17 extends, and the second rodless cylinder 18 lowers the two portal frames 20. The portal frame 20 furthest from the gantry 1 descends until it contacts the belt on the belt feeder unit 23. At this point, a die-casting box to be processed is located within the portal frame 20. Then, the output shaft of the corresponding fifth telescopic cylinder 21 extends, using the clamping plate 22 to clamp the die-casting box. The output shaft of the fourth telescopic cylinder 17 then retracts, lifting the die-casting box. Next, the second rodless cylinder 18 is activated, and its slider moves the two portal frames 20 horizontally, passing through the discharge port 2. When the portal frame 20 that was previously near the gantry 1 moves into the gantry 1, and the previously milled die-casting box is located within the portal frame 20, the second rodless cylinder 18 stops. Then, the output shaft of the fifth telescopic cylinder 21 inside the portal frame 20 is extended to clamp the milled die-casting box. Then, the second rodless cylinder 18 is activated, and the next die-casting box to be processed and the previous processed die-casting box move synchronously. Finally, the die-casting box to be processed is clamped above the workpiece table 301, and the processed die-casting box is moved above the belt-type discharge unit 24. Then, the output shaft of the fifth telescopic cylinder 21 inside the two portal frames 20 is retracted to release the two die-casting boxes. Then, the second rodless cylinder 18 is activated to retract, bringing the two portal frames 20 back to their original positions. Thus, the material exchange work between the previous processed die-casting box and the next die-casting box to be processed is automatically completed. This process can be repeated to achieve automated loading and unloading operations and further improve work efficiency.

[0067] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A gantry-type composite machining center for multi-face milling of die-cast box bodies, comprising a gantry frame, characterized in that, The gantry frame has feeding ports on both sides. A first telescopic cylinder is fixedly installed on the outer wall of both sides of the gantry frame. The same workpiece table is fixedly installed on the output shaft of the first telescopic cylinder. The workpiece table passes through the two feeding ports and does not contact the inner wall of the feeding ports. A reversing disk is provided inside the gantry frame. A connecting disk is provided below the reversing disk. Multiple mounting frames arranged in a circular array are fixedly installed at the bottom of the connecting disk. Milling mechanisms are provided in multiple mounting frames for milling the workpiece. An electric slide rail is fixedly installed on the top of the gantry frame. A moving platform is fixedly installed on the slide plate of the electric slide rail. A hollow cylinder is rotatably installed on the moving platform. The hollow cylinder is slidably connected to the top of the gantry frame. A lifting screw is provided inside the hollow cylinder. The bottom end of the lifting screw extends to the bottom of the hollow cylinder and is fixedly connected to a reversing disc. Two limit rods are fixedly installed on the top of the reversing disc. The top ends of the two limit rods pass through the moving platform and are slidably connected to it. The lifting screw is threadedly connected to the bottom of the hollow cylinder. A cooling mechanism is provided on the moving platform. The gantry frame is equipped with a position moving mechanism to move the die-casting box in the horizontal and vertical directions for cooling the processing points. The position moving mechanism is equipped with two first rodless cylinders. Each of the two first rodless cylinders has a mounting plate fixedly installed on its slider. Each of the two mounting plates has a rotating shaft rotatably installed on it. Each of the two rotating shafts has a main C-shaped frame fixedly installed at one end close to each other. Each of the two main C-shaped frames has a rotating seat rotatably installed inside it. Each of the two rotating seats has a clamping mechanism fixedly installed on one side close to each other to clamp the die-casting box.

2. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, A connecting frame is provided below the workpiece stage. A double-ended screw is rotatably installed inside the connecting frame. Two transverse clamping bars are threaded onto the double-ended screw. Multiple balls are embedded on the side of the two transverse clamping bars that are close to each other. The tops of the two transverse clamping bars extend to the top of the workpiece stage and are slidably connected to the workpiece stage. A first clamping motor is fixedly installed on one outer wall of the connecting frame. The output shaft of the first clamping motor is fixedly connected to one end of the double-ended screw. Two folding plates are fixedly installed at the bottom of the workpiece stage. A retraction cylinder is fixedly installed on the inner wall of the bottom of the two folding plates. The same stabilizing plate is fixedly installed on the output shaft of the two retraction cylinders. The stabilizing plate is fixedly connected to the bottom of the connecting frame, which can drive the connecting frame to descend as a whole, so that the transverse clamping bars do not protrude from the top of the workpiece stage.

3. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, A ring-shaped guide rail is fixedly installed at the bottom of the reversing disc. Four guide blocks are slidably installed on the ring-shaped guide rail. The bottoms of the four guide blocks are fixedly connected to the connecting disc. Each of the multiple milling mechanisms includes a milling motor. The multiple milling motors are respectively fixedly installed in the multiple mounting frames. Connectors are rotatably installed at the bottom of the multiple mounting frames. The output shafts of the multiple milling motors are respectively fixedly connected to the tops of the multiple connectors. The bottom ends of the multiple connectors are provided with mounting grooves. Milling cutters are fixedly installed in the multiple mounting grooves by bolts. One of the milling mechanisms is located directly above the workpiece table.

4. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 3, characterized in that, The cooling mechanism includes a water pump, which is fixedly installed on the top of the moving platform. One end of a corrugated pipe is fixedly installed on the water outlet of the water pump, and a connecting rigid pipe is fixedly installed on the other end of the corrugated pipe. A nozzle is fixedly installed at the bottom end of the connecting rigid pipe. The nozzle is located on one side of the milling mechanism directly above the workpiece table. A stabilizing arm is fixedly installed on the reversing disc, and the connecting rigid pipe passes through the stabilizing arm and is fixedly connected to it.

5. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, The outer ring wall of the connecting disc has multiple reversing slots arranged in a circular array. Each of the multiple reversing slots is adapted to a multiple mounting frame. A square slide rod is fixedly installed on the reversing disc. A translation block is slidably installed on the square slide rod. A directional clamp is fixedly installed at the bottom of the translation block. The bottom end of the directional clamp is inserted into one of the reversing slots and fits against its inner wall. A baffle is fixedly installed at the end of the square slide rod. A top spring is sleeved on the square slide rod. The two ends of the top spring are fixedly connected to the baffle and the translation block, respectively.

6. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, A rotary motor is fixedly installed on the top of the mobile platform. Gears are fixedly sleeved on both the output shaft of the rotary motor and the hollow cylinder, and the two gears mesh with each other.

7. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, The position moving mechanism includes a longitudinal double-sided support, which is fixedly installed inside the gantry frame. A longitudinal moving screw is rotatably installed inside the longitudinal double-sided support. A longitudinal moving motor is fixedly installed on one outer wall of the longitudinal double-sided support. The output shaft of the longitudinal moving motor is fixedly connected to one end of the longitudinal moving screw. A longitudinal slide is threaded onto the longitudinal moving screw. A transverse double-sided support is fixedly installed on the top of the longitudinal slide. A transverse moving screw is rotatably installed inside the transverse double-sided support. A transverse moving motor is fixedly installed on the outer wall of one end of the transverse double-sided support. The output shaft of the transverse moving motor is fixedly connected to one end of the transverse moving screw. A transverse slide is threaded onto the transverse moving screw. A support platform is fixedly installed on the top of the transverse slide. The bottoms of the two first rodless cylinders are both fixedly connected to the support platform.

8. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 7, characterized in that, A first steering motor is fixedly installed on each of the two mounting plates on opposite sides. The output shafts of the two first steering motors are fixedly connected to opposite ends of the two rotating shafts. A central shaft is rotatably installed inside each of the two main C-shaped frames. The two central shafts pass through the two rotating seats and are fixedly connected to the corresponding rotating seats. A second steering motor is fixedly installed on one outer wall of each of the two main C-shaped frames. The output shafts of the two second steering motors are fixedly connected to one end of the two central shafts.

9. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, Both clamping mechanisms include a secondary C-shaped frame, which is fixedly connected to the two rotating seats respectively. Two second telescopic cylinders are fixedly installed inside each of the two secondary C-shaped frames. Longitudinal clamping plates are fixedly installed on the output shafts of the four second telescopic cylinders. A third telescopic cylinder is fixedly installed on the inner wall of the two secondary C-shaped frames on the side away from each other. A base plate is fixedly installed on the output shaft of each of the two third telescopic cylinders.

10. The gantry-type composite machining center for multi-face milling of die-cast box bodies according to claim 1, characterized in that, An external support is fixedly installed on one side of the gantry frame. A second rodless cylinder is located below the external support, and a fourth telescopic cylinder is fixedly installed on the top of the external support. The output shaft of the fourth telescopic cylinder passes through the external support and is fixedly connected to the second rodless cylinder. The output shaft of the fourth telescopic cylinder is slidably connected to the external support. A bearing arm is fixedly installed on the slider of the second rodless cylinder. Two portal frames are fixedly installed at the bottom of the bearing arm. The size of the portal frames is smaller than the inner wall size of the discharge port. Two fifth telescopic cylinders are fixedly installed in each of the two portal frames. Clamping plates are fixedly installed on the output shafts of the four fifth telescopic cylinders. A belt-type feeding unit and a belt-type discharging unit are respectively provided on both sides of the gantry frame. The belt-type feeding unit is adapted to the portal frame away from the gantry frame, and the belt-type discharging unit is adapted to the portal frame close to the gantry frame.

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