Method and equipment for machining large iron castings through numerical control plane milling and boring machine

Abstract

The invention provides equipment for machining large iron castings by a numerical control plane milling and boring machine, which comprises a positioning device arranged on one side of a machine head and used for positioning punching positions on the iron castings; the hole aligning device is arranged in the hole of the iron casting and is used for determining that the central axes of the holes at the two ends of the iron casting are aligned; the adjusting device is arranged at the top of the lathe bed and used for adjusting the position of the iron casting so as to ensure that the face, needing to be punched, of the iron casting is perpendicular to the center shaft of the spindle motor. A positioning device is used for determining the position of a machining point, a laser beam and a receiver are matched for rapid positioning, a hole aligning device is installed in an iron casting hole, the laser beam is emitted from the central axis of the hole, then a first laser receiver is matched, it is ensured that the opposite punching position is accurate, the axis of the hole is aligned, and an adjusting device is used for adjusting and fixing the iron casting. Inclination is prevented, and machining stability is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled gantry boring and milling machines, and in particular to a method and equipment for machining large cast iron parts by using a numerically controlled gantry boring and milling machine. Background Art

[0002] CNC gantry boring and milling machine is a processing equipment that integrates mechanical, electronic, hydraulic and other advanced technologies. It is particularly suitable for semi-finishing and finishing of large cast iron parts. The equipment uses a gantry structure, which consists of double columns, movable crossbeams, connecting beams and other components to form a rigid frame to ensure the stability and accuracy of the processing process. Its worktable is large in size and has a strong load-bearing capacity, which can meet the processing needs of large cast iron parts.

[0003] The existing patent CN116276298A discloses a CNC gantry boring and milling machine for processing large metal parts and a method of using the same, and relates to the technical field of CNC gantry boring and milling machines, comprising a bed and an X-axis moving unit, a mounting groove is provided in the middle of the upper side of the bed, two ends of the bottom of the Y-axis moving unit are mounted on both sides of the middle of the bed, a Z-axis movable unit is mounted on the Y-axis moving unit, and a boring and milling spindle assembly is mounted on the Z-axis movable unit; when the worktable slides along the X-axis slide rail, the lubricating oil adding control unit contacts the lubricating oil box pressurizing unit, and the slide rail lubricating oil adding unit is pressurized by the lubricating oil box pressurizing unit, so that the lubricating oil in the slide rail lubricating oil adding unit enters the gap between the X-axis slide rail and the X-axis slide seat, the amount of lubricating oil added each time can be adjusted, and the frequency of adding lubricating oil can be changed, so as to ensure the smoothness of the worktable along the X-axis slide rail, which helps to improve the processing accuracy of large metal parts.

[0004] However, in actual use, especially when processing large cast iron parts, there are still some problems. After each processing, due to the weight of the cast iron part itself and the stress during the processing, its position may be slightly shifted. Although this shift is small, it may cause the original position to be processed to change, so that the holes may not be concentric, affecting the processing accuracy, and may also cause difficulties in subsequent assembly and use. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and provide a CNC gantry boring and milling machine for processing large cast iron parts. The positioning device cooperates with the hole alignment device to realize the positioning and calibration functions of the processing position, thereby solving the problem of cast iron parts being offset during processing.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for processing large cast iron parts by a CNC gantry boring and milling machine, comprising: A positioning device, which is arranged on one side of the machine head and is used to locate the punching position on the cast iron part; A hole alignment device, which is disposed inside the hole of the cast iron part and is used to ensure that the central axes of the holes at both ends of the cast iron part are aligned; An adjusting device, which is arranged on the top of the bed and is used to adjust the position of the cast iron part to ensure that the surface of the cast iron part that needs to be punched is perpendicular to the central axis of the spindle motor; During the processing of cast iron parts, the positioning device is used to determine the position where the hole needs to be punched on the cast iron part. Since the position of the cast iron part may shift after punching, the hole-aligning device is needed to locate the position of the hole at the other end of the cast iron part to ensure that the central axes of the holes at both ends of the cast iron part are aligned. The adjusting device can adjust the position of the cast iron part to ensure that the processing surface is perpendicular to the central axis of the spindle motor, so that the processed holes are not tilted.

[0007] Preferably, the positioning device comprises: A vertical sliding mechanism, the vertical sliding mechanism being arranged on one side of the machine head; A horizontal sliding mechanism, wherein the horizontal sliding mechanism is arranged on the vertical sliding mechanism; A measuring mechanism is slidably arranged on the horizontal sliding mechanism.

[0008] Preferably, the vertical sliding mechanism comprises: A slide rail, the slide rail being arranged on one side of the machine head; A slider, the slider being slidably disposed on the slide rail; a first fixing bolt, the first fixing bolt being inserted into the threaded hole on the slider; A scale is arranged on one side of the machine head.

[0009] Preferably, the horizontal sliding mechanism comprises: A sliding seat, the sliding seat being arranged on one side of the sliding block; A sliding ruler plate, the sliding ruler plate is slidably arranged inside the sliding seat; A second fixing bolt is inserted into the threaded hole on the sliding seat.

[0010] Preferably, the measuring mechanism comprises: A movable seat, the movable seat being slidably disposed on the sliding ruler plate; A first laser receiver, wherein the first laser receiver is disposed inside the groove on the movable seat; a third fixing bolt, the third fixing bolt being inserted into the threaded hole on the movable seat; An angle plate, the angle plate is arranged on one side of the movable seat; A bearing, wherein the bearing is arranged on one side of the angle plate; A scale finger plate, the scale finger plate is arranged on the outer side of the bearing; A connecting block, the connecting block is arranged on the outer side of the bearing; a fourth fixing bolt, the fourth fixing bolt being inserted into the threaded hole on the connecting block; A telescopic ruler, the telescopic ruler is arranged on the outer side of the bearing; A first laser emitter, wherein the first laser emitter is disposed on one side of the telescopic ruler; a second laser emitter, wherein the second laser emitter is disposed on one side of the movable seat; A first laser receiver is disposed on the machine head and is on the central axis of the spindle motor.

[0011] Preferably, the hole alignment device comprises: A cover plate and a driving assembly, wherein the driving assembly is arranged on the cover plate; A fixing component, the fixing component is arranged on one side of the cover plate; A positioning component is arranged on one side of the cover plate.

[0012] Preferably, the driving assembly comprises: A driving motor, wherein the driving motor is installed on one side of the cover plate; A worm, one end of which is drivingly connected to the output end of the drive motor; a worm wheel meshing with the worm gear; A rotating shaft, one end of which is connected to the worm gear transmission, and the rotating shaft is inserted into the interior of the cover plate.

[0013] Preferably, the fixing assembly comprises: A base, the base being arranged on one side of the cover plate; A slide groove, wherein a plurality of the slide grooves are provided on the base; A sliding plate, the sliding plate being slidably disposed inside the sliding groove; A turntable, the turntable is drivingly connected to one end of the rotating shaft; Arc-shaped grooves, a plurality of said arc-shaped grooves are evenly arranged on the rotating disk; A clamping rod, the clamping rod being arranged on one side of the sliding plate; A connecting plate, the connecting plate being arranged on one side of the sliding plate; A round rod is arranged on the connecting plate.

[0014] Preferably, the positioning component comprises: A support plate, the support plate being arranged on one side of the cover plate; A third laser emitter, the third laser emitter is disposed on the support plate, and the third laser emitter is coaxial with the rotating shaft; A fixing seat, the fixing seat being arranged on one side of the cover plate; A second laser receiver is disposed on the fixing seat, and the center of the second laser receiver is on the central axis of the third laser transmitter.

[0015] The present invention also discloses a method for machining large iron castings using a numerically controlled gantry boring and milling machine, which is compatible with a device for machining large iron castings using a numerically controlled gantry boring and milling machine, and comprises: Step 1: Adjust and fix: Before drilling holes in the cast iron, use the adjustment device to adjust and fix the position of the cast iron to prevent the holes from being tilted; Step 2: Measurement and positioning: Use the positioning device to perform laser positioning on the location where the hole needs to be punched; Step 3: Positioning and drilling: The laser signal is received by the first laser receiver on the machine head to determine the position of the spindle motor; Step 4: Correction and positioning: After drilling, the second laser receiver adjusts the position of the positioning device by receiving the laser signal to correct the offset caused by the processing; Step 5: Opposite drilling: The center of the opposite holes is determined by emitting laser from the axis of the hole through the hole-pointing device.

[0016] The beneficial effects of the present invention are: (1) The present invention can determine the relative positions of multiple processing points through the scale on the positioning device, and determine the processing position on the cast iron part through the laser beam emitted by the positioning device in conjunction with the first laser receiver, thereby achieving rapid positioning.

[0017] (2) The present invention installs the hole alignment device inside the hole of the cast iron part, so that the laser beam is emitted from the central axis of the hole. In combination with the first laser receiver, the opposite drilling position can be accurately located to ensure that the axis of the hole is aligned, which is convenient for subsequent assembly.

[0018] (3) The present invention adjusts the position of the cast iron part through the adjusting device to prevent the processed hole from tilting, and also plays a fixing role to ensure that the cast iron part remains stable during processing.

[0019] In summary, the present invention has the advantages of fast and accurate positioning, ensuring the alignment of the hole axes, and stable and reliable processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the machine head of the present invention; Figure 3 This is a schematic diagram of the structure of the first laser receiver of the present invention; Figure 4 It is a schematic diagram of the structure of the positioning device of the present invention; Figure 5 This is a schematic diagram of the structure of the second laser emitter of the present invention; Figure 6 It is a schematic diagram of the structure of the hole alignment device of the present invention; Figure 7 It is a schematic diagram of the structure of the fixing seat of the present invention; Figure 8 This is a schematic diagram of the explosion structure of the hole-checking device of the present invention; Fig. 9 A schematic diagram of a worm and a worm wheel of the present invention; Fig.10 It is a schematic diagram of the structure of the regulating device of the present invention; Fig.11 This is a schematic diagram of the bottom plate structure of the present invention; Fig.12 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Fig.13 It is a process flow chart of the present invention.

[0021] In the figure: 1. Positioning device; 11. Vertical sliding mechanism; 111. Slide rail; 112. Sliding block; 113. First fixing bolt; 114. Scale ruler; 12. Horizontal sliding mechanism; 121. Sliding seat; 122. Sliding ruler plate; 123. Second fixing bolt; 13. Measuring mechanism; 131. Movable seat; 1311. Scale pointer; 132. Third fixing bolt; 133. Angle plate; 134. Bearing; 135. Scale finger plate; 136. Connecting block; 137. Fourth fixing bolt; 138. Telescopic ruler; 139. First laser transmitter; 1310. Second laser transmitter; 1311. First laser receiver; 2. Hole alignment device; 21. Cover plate; 22. Drive assembly; 221. Drive motor; 222. Worm; 223. Worm wheel; 224. Rotating shaft; 23. Fixing assembly; 231. Base; 2311. Slide groove; 232. Sliding plate; 233. Turntable; 2331. Arc groove; 234. Clamping rod; 235. Connecting plate; 236. Round rod; 24. Positioning assembly; 241. Support plate; 242. Third laser transmitter; 243. Fixing seat; 244. Second laser receiver; 3. Adjustment device; 31. Bottom plate; 32. Clamping plate; 33. Slide plate; 34. Fixed plate; 35. Rotating plate; 36. Connecting shaft; 37. Push plate; 38. Hydraulic push rod; 4. Bed; 5. Machine head; 6. Spindle motor; 7. Cast iron parts. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiment 1 like Figures 1 to 3 As shown, this embodiment provides a device for processing large cast iron parts using a CNC gantry boring and milling machine, comprising: A positioning device 1, which is arranged on one side of the machine head 5 and is used to locate the punching position on the cast iron part 7; A hole alignment device 2, which is arranged inside the hole of the cast iron part 7 and is used to ensure that the central axes of the holes at both ends of the cast iron part 7 are aligned; An adjusting device 3, which is arranged on the top of the bed 4 and is used to adjust the position of the cast iron part 7 to ensure that the surface of the cast iron part 7 that needs to be punched is perpendicular to the central axis of the spindle motor 6; During the processing of the cast iron part 7, the positioning device 1 is used to determine the position where the hole needs to be punched on the cast iron part 7. Since the position of the cast iron part 7 may be offset after punching, the hole-aligning device 2 is needed to locate the position of the hole at the other end of the cast iron part 7 to ensure that the central axes of the holes at both ends of the cast iron part 7 are aligned. The adjusting device 3 can adjust the position of the cast iron part 7 to ensure that the processing surface is perpendicular to the central axis of the spindle motor 6, so that the processed hole does not tilt.

[0025] It should be noted that the holes processed in opposite directions on the cast iron part 7 must be axially aligned to ensure subsequent assembly. The spindle motor 6 is set on the slide rail on the machine head 5, and the axis line of the processing axis of the machine head 5 passes through the center of the first laser receiver 1311. This design is to cooperate with the positioning device 1 to quickly locate the processing position of the spindle motor 6.

[0026] like Figures 4 to 5 and Fig.12 As shown, the positioning device 1 comprises: A vertical sliding mechanism 11, wherein the vertical sliding mechanism 11 is arranged on one side of the machine head 5; A horizontal sliding mechanism 12, wherein the horizontal sliding mechanism 12 is arranged on the vertical sliding mechanism 11; The measuring mechanism 13 is slidably disposed on the horizontal sliding mechanism 12 .

[0027] Wherein, the vertical sliding mechanism 11 comprises: A slide rail 111, wherein the slide rail 111 is disposed on one side of the machine head 5; A slider 112, wherein the slider 112 is slidably disposed on the slide rail 111; A first fixing bolt 113, wherein the first fixing bolt 113 is inserted into a threaded hole on the slider 112; A scale 114 is disposed on one side of the machine head 5 .

[0028] Wherein, the horizontal sliding mechanism 12 comprises: A sliding seat 121, wherein the sliding seat 121 is disposed on one side of the sliding block 112; A sliding ruler plate 122, wherein the sliding ruler plate 122 is slidably disposed inside the sliding seat 121; The second fixing bolt 123 is inserted into the threaded hole on the sliding seat 121 .

[0029] Wherein, the measuring mechanism 13 comprises: A movable seat 131, wherein the movable seat 131 is slidably disposed on the sliding ruler 122; A first laser receiver 1311, wherein the first laser receiver 1311 is disposed inside a groove on the movable seat 131; A third fixing bolt 132, wherein the third fixing bolt 132 is inserted into the threaded hole on the movable seat 131; An angle plate 133, wherein the angle plate 133 is disposed on one side of the movable seat 131; A bearing 134, wherein the bearing 134 is disposed on one side of the angle plate 133; A scale finger plate 135 , wherein the scale finger plate 135 is disposed on the outer side of the bearing 134 ; A connecting block 136, wherein the connecting block 136 is disposed on the outer side of the bearing 134; a fourth fixing bolt 137, wherein the fourth fixing bolt 137 is inserted into the threaded hole of the connecting block 136; A telescopic ruler 138, wherein the telescopic ruler 138 is disposed outside the bearing 134; A first laser emitter 139, which is disposed on one side of the telescopic ruler 138; A second laser emitter 1310, wherein the second laser emitter 1310 is disposed at one side of the movable seat 131; The first laser receiver 1311 is disposed on the machine head 5 , and the first laser receiver 1311 is on the central axis of the spindle motor 6 .

[0030] It should be noted that the vertical position is determined by the scale 114, scale lines are set on the sliding scale plate 122 to determine the horizontal position, and degree lines are engraved on the angle disk 133 to determine the relative angle of the processing point on the cast iron part, and the groove on the movable seat 131 is provided with a rounded corner for easy observation of the scale on the sliding scale plate 122.

[0031] In detail: in the vertical direction, the slider 112 can slide on the slide rail 111, and then can be adjusted to an appropriate height, and the position is fixed by the first fixing bolt 113; in the horizontal direction, the movable seat 131 can slide on the sliding scale plate 122, adjust the horizontal position, and display the position scale through the first laser receiver 1311. After the position is determined, the third fixing bolt 132 is tightened to lock the position; when you want to determine the relative position of other processing points through the position of a processing point, you only need to know the angle and distance between the two processing points. After rotating the telescopic ruler 138 to the exact angle, tighten the angle by tightening the fourth fixing bolt 137. At this time, the scale finger plate 135 points to the corresponding angle. Stretch the telescopic ruler 138 to the corresponding scale, and then you can get the position of another processing point. The first laser emitter 139 can emit a laser beam to indicate the position of the processing point, and then the first laser receiver 1311 receives the laser signal to determine the processing position of the spindle motor 6. Similarly, the position of a processing point can also be located by the second laser emitter 1310.

[0032] like Figure 10 to Figure 11 As shown, the regulating device 3 comprises: A bottom plate 31 and a card plate 32, wherein the card plate 32 is disposed on one side of the bottom plate 31; A slide rail plate 33, wherein the slide rail plate 33 is symmetrically arranged on one side of the bottom plate 31 and the push plate 37; A fixing plate 34, wherein the fixing plate 34 is symmetrically arranged on one side of the bottom plate 31 and the push plate 37; A rotating plate 35, wherein the rotating plate 35 is rotatably connected to the fixed plate 34 and is slidably connected to the slide rail plate 33; A connecting shaft 36, wherein the connecting shaft 36 is inserted into the interior of the rotating plate 35; The push plate 37 is disposed on one side of the slide plate 33 and the fixed plate 34; A hydraulic push rod 38 is installed on one side of the bottom plate 31 , and a top rod of the hydraulic push rod 38 is connected to the connecting shaft 36 .

[0033] It should be noted that: the adjusting device 3 is quickly installed by inserting the clamping plate 32 into the groove on the bed 4, and the connecting shaft 36 is pushed by the hydraulic push rod 38 to move, thereby driving the push plate 37 to move to one side. The two sides of the cast iron part 7 are clamped and fixed by the push plate 37, so that the cast iron part 7 remains stable during the processing, and the processing surface of the cast iron part 7 can be adjusted to be perpendicular to the processing axis on the spindle motor 6, avoiding the problem of tilt in hole processing.

[0034] Embodiment 2 like Figures 6 to 9As shown, the components identical or corresponding to those in the first embodiment are marked with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that: The hole alignment device 2 comprises: A cover plate 21 and a driving assembly 22, wherein the driving assembly 22 is disposed on the cover plate 21; A fixing component 23, wherein the fixing component 23 is disposed on one side of the cover plate 21; The positioning assembly 24 is disposed on one side of the cover plate 21 .

[0035] Wherein, the driving component 22 includes: A driving motor 221, wherein the driving motor 221 is installed on one side of the cover plate 21; A worm 222, one end of which is drivingly connected to the output end of the driving motor 221; A worm wheel 223, wherein the worm wheel 223 is gear-engaged with the worm 222; A rotating shaft 224 , one end of which is drivingly connected to the worm gear 223 , and the rotating shaft 224 is inserted into the interior of the cover plate 21 .

[0036] Wherein, the fixing component 23 includes: A base 231, wherein the base 231 is disposed on one side of the cover plate 21; A slide groove 2311, wherein a plurality of slide grooves 2311 are provided on the base 231; A sliding plate 232, wherein the sliding plate 232 is slidably disposed inside the sliding groove 2311; A rotating disk 233, wherein the rotating disk 233 is drivingly connected to one end of the rotating shaft 224; Arc grooves 2331, a plurality of arc grooves 2331 are evenly formed on the rotating disk 233; A clamping rod 234, wherein the clamping rod 234 is disposed on one side of the sliding plate 232; A connecting plate 235, wherein the connecting plate 235 is disposed on one side of the sliding plate 232; The round rod 236 is disposed on the connecting plate 235 .

[0037] Wherein, the positioning component 24 includes: A support plate 241, wherein the support plate 241 is disposed on one side of the cover plate 21; A third laser emitter 242, wherein the third laser emitter 242 is disposed on the support plate 241, and the third laser emitter 242 is coaxial with the rotating shaft 224; A fixing seat 243, wherein the fixing seat 243 is disposed on one side of the cover plate 21; The second laser receiver 244 is disposed on the fixing seat 243 , and the center of the second laser receiver 244 is on the central axis of the third laser transmitter 242 .

[0038] It should be noted that: the driving component 22 provides power for the fixing component 23, and the worm gear 223 can be driven by the worm 222, but not vice versa. This design is to ensure that the hole-matching device 2 can still be fixed inside the hole on the cast iron part 7 after the driving motor 221 is powered off, and to ensure that the centers of the third laser emitter 242 and the second laser receiver 244 can be located on the central axis of the hole on the cast iron part 7.

[0039] In detail: the driving motor 221 drives the worm 222 to drive the worm wheel 223 to rotate, and the worm wheel 223 then drives the turntable 233 to rotate through the rotating shaft 224. The arc groove 2331 on the turntable 233 drives the clamping rod 234 to move, and then drives the sliding plate 232 to slide inside the sliding groove 2311, and finally makes the round rod 236 expand outward evenly, and the round rod 236 is tightly attached to the inside of the hole on the cast iron part 7, so that the hole-aligning device 2 is fixed inside the hole, and the centers of the third laser emitter 242 and the second laser receiver 244 can pass through the central axis of the hole, which is convenient for positioning; The laser beam emitted by the third laser emitter 242 is emitted from the central axis of the hole on the cast iron part 7. After the first laser receiver 1311 on the machine head 5 receives the laser signal, the processing point position of the hole opposite to the hole on the cast iron part 7 is determined, so that the opposite holes on the cast iron part 7 are ensured to be coaxial, which is convenient for subsequent assembly; The second laser receiver 244 is used to receive the laser beam signal emitted by the first laser emitter 139 or the second laser emitter 1310. After one more processing, the horizontal or vertical position of the positioning device 1 is adjusted so that the position of the laser beam emitted by the positioning device 1 is realigned with the hole on the cast iron part 7 to correct the positioning.

[0040] Embodiment 3 like Fig.13 As shown, this embodiment provides a method for machining large cast iron parts by a CNC gantry boring and milling machine, comprising the following steps: Step 1: Adjust and fix: Before drilling a hole in the cast iron part 7, adjust and fix the position of the cast iron part 7 by means of the adjusting device 3 to prevent the drilled hole from being tilted; Step 2: Measurement and positioning: Use the positioning device 1 to perform laser positioning on the position where the hole needs to be punched; Step 3: Positioning and drilling: The first laser receiver 1311 on the machine head 5 receives the laser signal to determine the position of the spindle motor 6; Step 4: Correction and positioning: After drilling, the second laser receiver 244 adjusts the position of the positioning device 1 by receiving the laser signal to correct the offset caused by the processing; Step 5, opposite drilling: The hole-pointing device 2 emits a laser from the axis of the hole to determine the center of the opposite hole.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A CNC gantry boring and milling machine for processing large cast iron parts, characterized in that: include: A positioning device, which is arranged on one side of the machine head and is used to locate the punching position on the cast iron part; A hole alignment device, which is disposed inside the hole of the cast iron part and is used to ensure that the central axes of the holes at both ends of the cast iron part are aligned; An adjusting device, which is arranged on the top of the bed and is used to adjust the position of the cast iron part to ensure that the surface of the cast iron part that needs to be punched is perpendicular to the central axis of the spindle motor; During the processing of cast iron parts, the positioning device is used to determine the position where the hole needs to be punched on the cast iron part. Since the position of the cast iron part may shift after punching, the hole-aligning device is needed to locate the position of the hole at the other end of the cast iron part to ensure that the central axes of the holes at both ends of the cast iron part are aligned. The adjusting device can adjust the position of the cast iron part to ensure that the processing surface is perpendicular to the central axis of the spindle motor, so that the processed holes are not tilted.

2. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 1, characterized in that: The positioning device includes: A vertical sliding mechanism, the vertical sliding mechanism being arranged on one side of the machine head; A horizontal sliding mechanism, wherein the horizontal sliding mechanism is arranged on the vertical sliding mechanism; A measuring mechanism is slidably arranged on the horizontal sliding mechanism.

3. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 2, characterized in that: The vertical sliding mechanism comprises: A slide rail, the slide rail being arranged on one side of the machine head; A slider, the slider being slidably disposed on the slide rail; a first fixing bolt, the first fixing bolt being inserted into the threaded hole on the slider; A scale is arranged on one side of the machine head.

4. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 3, characterized in that: The horizontal sliding mechanism comprises: A sliding seat, the sliding seat being arranged on one side of the sliding block; A sliding ruler plate, the sliding ruler plate is slidably arranged inside the sliding seat; A second fixing bolt is inserted into the threaded hole on the sliding seat.

5. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 4, characterized in that: The measuring mechanism comprises: A movable seat, the movable seat being slidably disposed on the sliding ruler plate; A first laser receiver, wherein the first laser receiver is disposed inside the groove on the movable seat; a third fixing bolt, the third fixing bolt being inserted into the threaded hole on the movable seat; An angle plate, the angle plate is arranged on one side of the movable seat; A bearing, wherein the bearing is arranged on one side of the angle plate; A scale finger plate, the scale finger plate is arranged on the outer side of the bearing; A connecting block, the connecting block is arranged on the outer side of the bearing; a fourth fixing bolt, the fourth fixing bolt being inserted into the threaded hole on the connecting block; A telescopic ruler, the telescopic ruler is arranged on the outer side of the bearing; A first laser emitter, wherein the first laser emitter is disposed on one side of the telescopic ruler; a second laser emitter, wherein the second laser emitter is disposed on one side of the movable seat; A first laser receiver is disposed on the machine head and is on the central axis of the spindle motor.

6. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 1, characterized in that: The hole alignment device comprises: A cover plate and a driving assembly, wherein the driving assembly is arranged on the cover plate; A fixing component, the fixing component is arranged on one side of the cover plate; A positioning component is arranged on one side of the cover plate.

7. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 6, characterized in that: The drive assembly comprises: A driving motor, wherein the driving motor is installed on one side of the cover plate; A worm, one end of which is drivingly connected to the output end of the drive motor; a worm wheel meshing with the worm gear; A rotating shaft, one end of which is connected to the worm gear transmission, and the rotating shaft is inserted into the interior of the cover plate.

8. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 7, characterized in that: The fixing assembly comprises: A base, the base being arranged on one side of the cover plate; A slide groove, wherein a plurality of the slide grooves are provided on the base; A sliding plate, the sliding plate being slidably disposed inside the sliding groove; A turntable, the turntable is drivingly connected to one end of the rotating shaft; Arc-shaped grooves, a plurality of said arc-shaped grooves are evenly arranged on the rotating disk; A clamping rod, the clamping rod being arranged on one side of the sliding plate; A connecting plate, the connecting plate being arranged on one side of the sliding plate; A round rod is arranged on the connecting plate.

9. The device for machining large iron castings by a CNC gantry boring and milling machine according to claim 7, characterized in that: The positioning component comprises: A support plate, the support plate being arranged on one side of the cover plate; A third laser emitter, the third laser emitter is disposed on the support plate, and the third laser emitter is coaxial with the rotating shaft; A fixing seat, the fixing seat being arranged on one side of the cover plate; A second laser receiver is disposed on the fixing seat, and the center of the second laser receiver is on the central axis of the third laser transmitter.

10. A method for processing large iron castings using a CNC gantry boring and milling machine for processing large iron castings according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Adjust and fix: Before drilling holes in the cast iron, use the adjustment device to adjust and fix the position of the cast iron to prevent the holes from being tilted; Step 2: Measurement and positioning: Use the positioning device to perform laser positioning on the location where the hole needs to be punched; Step 3: Positioning and drilling: The laser signal is received by the first laser receiver on the machine head to determine the position of the spindle motor; Step 4: Correction and positioning: After drilling, the second laser receiver adjusts the position of the positioning device by receiving the laser signal to correct the offset caused by the processing; Step 5: Opposite drilling: The center of the opposite holes is determined by emitting laser from the axis of the hole through the hole-pointing device.

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