A method and equipment for machining large cast iron parts using a CNC gantry milling machine

Abstract

This invention provides a CNC gantry milling machine for machining large cast iron parts, comprising: a positioning device disposed on one side of the machine head and used to locate the drilling position on the cast iron part; a hole alignment device disposed inside the hole in the cast iron part and used to ensure the alignment of the central axes of the holes at both ends of the cast iron part; and an adjustment device disposed on the top of the machine bed and used to adjust the position of the cast iron part to ensure that the surface on the cast iron part to be drilled is perpendicular to the central axis of the spindle motor. The positioning device determines the machining point position, a laser beam and receiver work together for rapid positioning, the hole alignment device is installed inside the hole in the cast iron part so that the laser beam is emitted from the central axis of the hole, and then, in conjunction with a first laser receiver, the accuracy of the opposing drilling position is ensured, guaranteeing the alignment of the hole axes. The adjustment device adjusts and fixes the cast iron part to prevent tilting and ensure stable machining.

Description

Technical Field

[0001] This invention relates to the field of CNC gantry milling machine technology, and in particular to a method and equipment for machining large cast iron parts using a CNC gantry milling machine. Background Technology

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

[0003] Existing patent CN116276298A discloses a CNC gantry milling machine for machining large metal parts and its usage method, relating to the technical field of CNC gantry milling machines. It includes a bed and an X-axis moving unit. A mounting groove is provided in the upper center of the bed. The bottom ends 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 milling spindle assembly is mounted on the Z-axis movable unit. When the worktable slides along the X-axis slide rail, the lubricating oil addition control unit contacts the lubricating oil box pressurization unit. The lubricating oil box pressurization unit pressurizes the slide rail lubricating oil addition unit, causing the lubricating oil in the slide rail lubricating oil addition unit to enter the gap between the X-axis slide rail and the X-axis slide block. The amount of lubricating oil added each time can be adjusted, and the frequency of lubricating oil addition can be changed, ensuring the smoothness of the worktable's movement along the X-axis slide rail and helping to improve the machining accuracy of large metal parts.

[0004] However, in actual use, especially when machining large cast iron parts, there are still some problems. After each machining, due to the weight of the cast iron part itself and the stress during the machining process, its position may shift slightly. Although this shift is small, it may cause the original machining position to change, which may result in the drilled holes being non-concentric, affecting the machining accuracy and causing difficulties in subsequent assembly and use. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a CNC gantry milling machine for machining large cast iron parts. This machine uses a positioning device in conjunction with a hole-aligning device to achieve positioning and calibration of the machining position, thus solving the problem of cast iron parts shifting during machining.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A CNC gantry milling machine for machining large cast iron parts includes:

[0008] A positioning device, which is located on one side of the machine head and is used to position the drilling position on the cast iron part;

[0009] A hole alignment device, which is disposed inside the hole of the cast iron part and is used to determine the alignment of the center axes of the holes at both ends of the cast iron part;

[0010] An adjustment device is provided 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 drilled is perpendicular to the central axis of the spindle motor.

[0011] During the machining of cast iron parts, a positioning device is used to determine the position where holes need to be drilled on the cast iron parts. Since the position of the cast iron parts may shift after drilling, a hole alignment device is needed to position the drilling position at the other end of the cast iron parts to ensure that the central axes of the holes at both ends of the cast iron parts are aligned. An adjustment device can adjust the position of the cast iron parts to ensure that the machining surface is perpendicular to the central axis of the spindle motor, so that the machined holes do not tilt.

[0012] Preferably, the positioning device includes:

[0013] A vertical sliding mechanism is provided on one side of the machine head;

[0014] A horizontal sliding mechanism, wherein the horizontal sliding mechanism is disposed on the vertical sliding mechanism;

[0015] A measuring mechanism is slidably mounted on the horizontal sliding mechanism.

[0016] Preferably, the vertical sliding mechanism includes:

[0017] A slide rail is provided on one side of the machine head;

[0018] A slider, which is slidably disposed on the slide rail;

[0019] The first fixing bolt is inserted into the threaded hole on the slider;

[0020] A scale is provided on one side of the machine head.

[0021] Preferably, the horizontal sliding mechanism includes:

[0022] A sliding seat, wherein the sliding seat is disposed on one side of the slider;

[0023] A sliding ruler plate, which is slidably disposed inside the sliding seat;

[0024] The second fixing bolt is inserted into the threaded hole on the sliding seat.

[0025] Preferably, the measuring mechanism includes:

[0026] A movable seat, which is slidably disposed on the sliding ruler plate;

[0027] A first laser receiver is disposed inside a groove on the movable seat;

[0028] The third fixing bolt is inserted into the threaded hole on the movable seat;

[0029] An angle plate, wherein the angle plate is disposed on one side of the movable seat;

[0030] A bearing, wherein the bearing is disposed on one side of the angle disk;

[0031] A graduated finger plate, the graduated finger plate being disposed on the outer side of the bearing;

[0032] A connecting block, wherein the connecting block is disposed on the outside of the bearing;

[0033] The fourth fixing bolt is inserted into the threaded hole on the connecting block;

[0034] A telescopic ruler, wherein the telescopic ruler is disposed on the outside of the bearing;

[0035] A first laser emitter is disposed on one side of the telescopic ruler;

[0036] A second laser emitter is disposed on one side of the movable base;

[0037] A first laser receiver is disposed on the machine head and is located on the central axis of the spindle motor.

[0038] Preferably, the hole-aligning device includes:

[0039] A cover plate and a drive assembly, wherein the drive assembly is disposed on the cover plate;

[0040] A fixing component is disposed on one side of the cover plate;

[0041] A positioning component is disposed on one side of the cover plate.

[0042] Preferably, the driving component includes:

[0043] A drive motor is mounted on one side of the cover plate;

[0044] A worm gear, one end of which is connected to the output end of the drive motor;

[0045] A worm gear, which meshes with the worm gear;

[0046] A rotating shaft, one end of which is connected to the worm gear drive, is inserted inside the cover plate.

[0047] Preferably, the fixing component includes:

[0048] A base, wherein the base is disposed on one side of the cover plate;

[0049] The base has multiple sliding grooves.

[0050] A sliding plate, which is slidably disposed inside the groove;

[0051] A turntable, wherein the turntable is connected to one end of the rotating shaft in a driving manner;

[0052] Arc-shaped grooves: Multiple arc-shaped grooves are evenly distributed on the turntable;

[0053] A locking lever, wherein the locking lever is disposed on one side of the sliding plate;

[0054] A connecting plate, wherein the connecting plate is disposed on one side of the sliding plate;

[0055] A round rod, which is disposed on the connecting plate.

[0056] Preferably, the positioning component includes:

[0057] A support plate, wherein the support plate is disposed on one side of the cover plate;

[0058] A third laser emitter is mounted on the support plate and is coaxial with the rotating shaft.

[0059] A fixing seat is disposed on one side of the cover plate;

[0060] The second laser receiver is mounted on the fixed base, and the center of the second laser receiver is on the central axis of the third laser emitter.

[0061] This invention also discloses a method for machining large cast iron parts using a CNC gantry milling machine, adapted to equipment for machining large cast iron parts using a CNC gantry milling machine, comprising:

[0062] Step 1: Adjustment and Fixation: Before drilling holes in the cast iron part, adjust and fix the position of the cast iron part using the adjustment device to prevent the drilled holes from tilting.

[0063] Step 2, Measurement and Positioning: The location to be drilled is laser-positioned using a positioning device;

[0064] 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;

[0065] Step 4, Positioning Correction: After drilling, the second laser receiver receives laser signals and adjusts the position of the positioning device to correct the offset caused by the process.

[0066] Step 5, Drilling in opposite directions: The center of the opposite hole is determined by emitting a laser from the center of the hole axis using a hole-aligning device.

[0067] The beneficial effects of this invention are as follows:

[0068] (1) The present invention can determine the relative positions of multiple processing points by means of the scale on the positioning device, and determine the processing position on the cast iron part by means of the laser beam emitted by the positioning device and the first laser receiver, thereby achieving rapid positioning.

[0069] (2) By installing the hole-aligning device inside the hole of the cast iron part, the laser beam is emitted from the central axis of the hole. Combined with the first laser receiver, the opposing hole position can be accurately located to ensure the axial alignment of the hole and facilitate subsequent assembly.

[0070] (3) The present invention adjusts the position of the cast iron parts by adjusting the device to prevent the machined holes from tilting, and also plays a fixing role to ensure that the cast iron parts remain stable during processing.

[0071] In summary, the present invention has the advantages of rapid and accurate positioning, ensuring alignment of hole axes, and stable and reliable processing. Attached Figure Description

[0072] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0073] Figure 2 This is a schematic diagram of the head structure of the present invention;

[0074] Figure 3 This is a schematic diagram of the structure of the first laser receiver of the present invention;

[0075] Figure 4 This is a schematic diagram of the positioning device of the present invention;

[0076] Figure 5 This is a schematic diagram of the structure of the second laser emitter of the present invention;

[0077] Figure 6 This is a schematic diagram of the hole-setting device of the present invention;

[0078] Figure 7 This is a schematic diagram of the fixing base structure of the present invention;

[0079] Figure 8This is an exploded structural diagram of the hole-setting device of the present invention;

[0080] Figure 9 This is a schematic diagram of the worm gear and worm wheel of the present invention;

[0081] Figure 10 This is a schematic diagram of the regulating device structure of the present invention;

[0082] Figure 11 This is a schematic diagram of the base plate structure of the present invention;

[0083] Figure 12 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0084] Figure 13 This is a process flow diagram of the present invention.

[0085] In the picture:

[0086] 1. Positioning device; 11. Vertical sliding mechanism; 111. Slide rail; 112. Slider; 113. First fixing bolt; 114. Scale; 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 pointer plate; 136. Connecting block; 137. Fourth fixing bolt; 138. Telescopic ruler; 139. First laser emitter; 1310. Second laser emitter; 1311. First laser receiver;

[0087] 2. Hole alignment device; 21. Cover plate; 22. Drive assembly; 221. Drive motor; 222. Worm gear; 223. Worm wheel; 224. Rotating shaft; 23. Fixing assembly; 231. Base; 2311. Slide groove; 232. Sliding plate; 233. Turntable; 2331. Arc groove; 234. Locking rod; 235. Connecting plate; 236. Round rod; 24. Positioning assembly; 241. Support plate; 242. Third laser emitter; 243. Fixing base; 244. Second laser receiver;

[0088] 3. Adjustment device; 31. Base plate; 32. Clamping plate; 33. Slide rail plate; 34. Fixing plate; 35. Rotating plate; 36. Connecting shaft; 37. Push plate; 38. Hydraulic push rod;

[0089] 4. Bed; 5. Headstock; 6. Spindle motor; 7. Cast iron parts. Detailed Implementation

[0090] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0091] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0092] Example 1

[0093] like Figures 1 to 3 As shown, this embodiment provides a CNC gantry milling machine for machining large cast iron parts, including:

[0094] Positioning device 1, which is disposed on one side of the machine head 5 and is used to position the drilling position on the cast iron part 7;

[0095] Hole alignment device 2, which is disposed inside the hole of the cast iron part 7 and is used to determine the alignment of the center axis of the hole at both ends of the cast iron part 7;

[0096] Adjustment device 3, which is located 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 drilled is perpendicular to the central axis of the spindle motor 6.

[0097] During the machining of cast iron part 7, the positioning device 1 determines the position where holes need to be drilled on cast iron part 7. Since the position of cast iron part 7 may shift after drilling, the hole alignment device 2 is needed to position the drilling position at the other end of cast iron part 7 to ensure that the central axes of the holes at both ends of cast iron part 7 are aligned. The adjustment device 3 can adjust the position of cast iron part 7 to ensure that the machining surface is perpendicular to the central axis of the spindle motor 6, so that the machined holes do not tilt.

[0098] It should be noted that the holes machined on the cast iron part 7 must be aligned with their axes to ensure subsequent assembly. The spindle motor 6 is mounted on the slide rail on the machine head 5. The axis of the machining 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 position the machining position of the spindle motor 6.

[0099] like Figures 4 to 5 and Figure 12 As shown, the positioning device 1 includes:

[0100] A vertical sliding mechanism 11 is disposed on one side of the machine head 5;

[0101] A horizontal sliding mechanism 12 is provided on the vertical sliding mechanism 11;

[0102] Measuring mechanism 13 is slidably mounted on horizontal sliding mechanism 12.

[0103] The vertical sliding mechanism 11 includes:

[0104] Slide rail 111, the slide rail 111 is disposed on one side of the machine head 5;

[0105] Slider 112, which is slidably disposed on slide rail 111;

[0106] The first fixing bolt 113 is inserted into the threaded hole on the slider 112;

[0107] A scale 114 is provided on one side of the machine head 5.

[0108] The horizontal sliding mechanism 12 includes:

[0109] A sliding seat 121 is disposed on one side of the slider 112;

[0110] A sliding ruler plate 122 is slidably disposed inside the sliding seat 121;

[0111] The second fixing bolt 123 is inserted into the threaded hole on the sliding seat 121.

[0112] The measuring mechanism 13 includes:

[0113] Movable seat 131, which is slidably disposed on the sliding ruler plate 122;

[0114] The first laser receiver 1311 is disposed inside the groove on the movable seat 131;

[0115] The third fixing bolt 132 is inserted into the threaded hole on the movable seat 131;

[0116] Angle plate 133, wherein the angle plate 133 is disposed on one side of the movable seat 131;

[0117] Bearing 134, the bearing 134 being disposed on one side of the angle disk 133;

[0118] A scale plate 135 is disposed on the outer side of the bearing 134;

[0119] Connecting block 136, the connecting block 136 being disposed on the outer side of the bearing 134;

[0120] The fourth fixing bolt 137 is inserted into the threaded hole on the connecting block 136;

[0121] Telescopic ruler 138, which is disposed on the outside of the bearing 134;

[0122] A first laser emitter 139 is disposed on one side of the telescopic ruler 138;

[0123] The second laser emitter 1310 is disposed on one side of the movable base 131;

[0124] The first laser receiver 1311 is disposed on the machine head 5 and is located on the central axis of the spindle motor 6.

[0125] It should be noted that the vertical position is determined by the scale 114, the horizontal position is determined by the scale lines on the sliding scale plate 122, and the angle plate 133 is engraved with degree lines to determine the relative angle of the machining points on the cast iron part. The groove on the movable seat 131 is provided with rounded corners to facilitate observation of the scale on the sliding scale plate 122.

[0126] In detail: In the vertical direction, the slider 112 can slide on the slide rail 111 to adjust to an appropriate height and is fixed in position by the first fixing bolt 113; in the horizontal direction, the movable seat 131 can slide on the sliding ruler 122 to adjust the horizontal position and display the position scale through the first laser receiver 1311. After the position is determined, the position is locked by tightening the third fixing bolt 132; when you want to determine the relative position of other processing points through the position of one processing point, you only need to know the angle and distance between the two processing points. After rotating the telescopic ruler 138 to the accurate angle, the angle is locked by tightening the fourth fixing bolt 137. At this time, the scale plate 135 points to the corresponding angle. Extend the telescopic ruler 138 to the corresponding scale, and 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 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.

[0127] like Figures 10 to 11 As shown, the adjusting device 3 includes:

[0128] A base plate 31 and a clamping plate 32, wherein the clamping plate 32 is disposed on one side of the base plate 31;

[0129] The slide rail 33 is symmetrically arranged on one side of the base plate 31 and the push plate 37;

[0130] A fixing plate 34 is symmetrically arranged on one side of the base plate 31 and the push plate 37;

[0131] The rotating plate 35 is rotatably connected to the fixed plate 34 and slidably connected to the slide rail plate 33.

[0132] A connecting shaft 36 is inserted inside the rotating plate 35;

[0133] The push plate 37 is disposed on one side of the slide rail plate 33 and the fixing plate 34;

[0134] A hydraulic push rod 38 is installed on one side of the base plate 31, and the top rod of the hydraulic push rod 38 is connected to the connecting shaft 36.

[0135] It should be noted that the adjustment device 3 is quickly installed by inserting the clamping plate 32 into the groove on the bed 4. The hydraulic push rod 38 pushes the connecting shaft 36 to move, which in turn drives 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. It can also adjust the processing surface of the cast iron part 7 to be perpendicular to the processing shaft on the spindle motor 6, avoiding the problem of tilting during hole processing.

[0136] Example 2

[0137] like Figures 6 to 9 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0138] The hole-aligning device 2 includes:

[0139] The cover plate 21 and the drive assembly 22 are disposed on the cover plate 21;

[0140] Fixing component 23, wherein the fixing component 23 is disposed on one side of the cover plate 21;

[0141] Positioning component 24 is disposed on one side of the cover plate 21.

[0142] The driving component 22 includes:

[0143] A drive motor 221 is mounted on one side of the cover plate 21;

[0144] Worm gear 222, one end of which is connected to the output end of drive motor 221;

[0145] Worm gear 223, which meshes with worm 222;

[0146] A rotating shaft 224 is provided, one end of which is connected to the worm gear 223 for transmission, and the rotating shaft 224 is inserted inside the cover plate 21.

[0147] The fixing component 23 includes:

[0148] Base 231, the base 231 is disposed on one side of the cover plate 21;

[0149] Slide groove 2311, a plurality of slide grooves 2311 are provided on the base 231;

[0150] A sliding plate 232 is slidably disposed inside the groove 2311;

[0151] Turntable 233, wherein one end of the rotating shaft 224 is connected in a transmission manner;

[0152] Arc-shaped groove 2331, a plurality of arc-shaped grooves 2331 are evenly provided on the turntable 233;

[0153] A lever 234 is disposed on one side of the sliding plate 232;

[0154] A connecting plate 235 is disposed on one side of the sliding plate 232;

[0155] A round rod 236 is disposed on the connecting plate 235.

[0156] The positioning component 24 includes:

[0157] Support plate 241, the support plate 241 is disposed on one side of the cover plate 21;

[0158] The third laser emitter 242 is disposed on the support plate 241 and is coaxial with the rotating shaft 224.

[0159] A fixing seat 243 is disposed on one side of the cover plate 21;

[0160] The second laser receiver 244 is disposed on the fixed base 243, and the center of the second laser receiver 244 is on the central axis of the third laser emitter 242.

[0161] It should be noted that the drive assembly 22 provides power to the fixed assembly 23. The worm gear 222 can drive the worm wheel 223, but the reverse is not possible. This design is so that after the drive motor 221 is de-energized, the hole-aligning device 2 can still be fixed inside the hole on the cast iron part 7, and ensure that the centers of the third laser emitter 242 and the second laser receiver 244 are both located on the central axis of the hole on the cast iron part 7.

[0162] In detail: the drive motor 221 drives the worm gear 222 to drive the worm wheel 223 to rotate. The worm wheel 223 then drives the turntable 233 to rotate through the rotating shaft 224. The arc groove 2331 on the turntable 233 will drive the locking rod 234 to move, which in turn drives the sliding plate 232 to slide inside the sliding groove 2311. Finally, the round rod 236 expands outward evenly. The round rod 236 is in close contact with the inside of the hole on the cast iron part 7, fixing the hole-aligning device 2 inside the hole. This ensures that 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.

[0163] The laser beam emitted by the third laser emitter 242 is emitted from the central axis of the hole in the cast iron part 7. After the first laser receiver 1311 on the machine head 5 receives the laser signal, it determines the machining point position of the opposite hole in the cast iron part 7, so that the opposite holes in the cast iron part 7 are coaxial, which facilitates subsequent assembly.

[0164] 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 processing again, 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 re-aligned with the hole on the cast iron part 7, and the positioning is corrected.

[0165] Example 3

[0166] like Figure 13 As shown, this embodiment provides a method for machining large cast iron parts using a CNC gantry milling machine, including the following steps:

[0167] Step 1, Adjustment and Fixation: Before drilling holes in the cast iron part 7, adjust and fix the position of the cast iron part 7 using the adjustment device 3 to prevent the drilled holes from tilting.

[0168] Step 2, Measurement and Positioning: The location to be drilled is laser-positioned using positioning device 1;

[0169] Step 3, Positioning and Drilling: The laser signal is received by the first laser receiver 1311 on the machine head 5 to determine the position of the spindle motor 6;

[0170] Step 4, Positioning Correction: After drilling, the second laser receiver 244 receives the laser signal and adjusts the position of the positioning device 1 to correct the offset caused by the process.

[0171] Step 5, Drilling in opposite directions: The center of the opposite hole is determined by emitting a laser from the hole axis using the hole-aligning device 2.

[0172] 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 within the protection scope of the present invention.

Claims

1. A CNC gantry milling machine for machining large cast iron parts, characterized in that, include: A positioning device, which is located on one side of the machine head and is used to position the drilling 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 determine the alignment of the center axes of the holes at both ends of the cast iron part; An adjustment device is provided 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 drilled is perpendicular to the central axis of the spindle motor. During the machining of cast iron parts, a positioning device is used to determine the position where holes need to be drilled on the cast iron parts. Since the position of the cast iron parts may shift after drilling, a hole alignment device is needed to position the drilling position at the other end of the cast iron parts to ensure that the central axes of the holes at both ends of the cast iron parts are aligned. An adjustment device can adjust the position of the cast iron parts to ensure that the machining surface is perpendicular to the central axis of the spindle motor, so that the machined holes do not tilt.

2. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 1, characterized in that, The positioning device includes: A vertical sliding mechanism is provided on one side of the machine head; A horizontal sliding mechanism, wherein the horizontal sliding mechanism is disposed on the vertical sliding mechanism; A measuring mechanism is slidably mounted on the horizontal sliding mechanism.

3. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 2, characterized in that, The vertical sliding mechanism includes: A slide rail is provided on one side of the machine head; A slider, which is slidably disposed on the slide rail; The first fixing bolt is inserted into the threaded hole on the slider; A scale is provided on one side of the machine head.

4. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 3, characterized in that, The horizontal sliding mechanism includes: A sliding seat, wherein the sliding seat is disposed on one side of the slider; A sliding ruler plate, which is slidably disposed inside the sliding seat; The second fixing bolt is inserted into the threaded hole on the sliding seat.

5. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 4, characterized in that, The measuring mechanism includes: A movable seat, which is slidably disposed on the sliding ruler plate; The third fixing bolt is inserted into the threaded hole on the movable seat; An angle plate, wherein the angle plate is disposed on one side of the movable seat; A bearing, wherein the bearing is disposed on one side of the angle disk; A graduated finger plate, the graduated finger plate being disposed on the outer side of the bearing; A connecting block, wherein the connecting block is disposed on the outside of the bearing; The fourth fixing bolt is inserted into the threaded hole on the connecting block; A telescopic ruler, wherein the telescopic ruler is disposed on the outside of the bearing; A first laser emitter is disposed on one side of the telescopic ruler; A second laser emitter is disposed on one side of the movable base; A first laser receiver is disposed on the machine head and is located on the central axis of the spindle motor.

6. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 1, characterized in that, The hole-aligning device includes: A cover plate and a drive assembly, wherein the drive assembly is disposed on the cover plate; A fixing component is disposed on one side of the cover plate; A positioning component is disposed on one side of the cover plate.

7. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 6, characterized in that, The driving component includes: A drive motor is mounted on one side of the cover plate; A worm gear, one end of which is connected to the output end of the drive motor; A worm gear, which meshes with the worm gear; A rotating shaft, one end of which is connected to the worm gear drive, is inserted inside the cover plate.

8. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 7, characterized in that, The fixing component includes: A base, wherein the base is disposed on one side of the cover plate; The base has multiple sliding grooves. A sliding plate, which is slidably disposed inside the groove; A turntable, wherein the turntable is connected to one end of the rotating shaft in a driving manner; Arc-shaped grooves: Multiple arc-shaped grooves are evenly distributed on the turntable; A locking lever, wherein the locking lever is disposed on one side of the sliding plate; A connecting plate, wherein the connecting plate is disposed on one side of the sliding plate; A round rod, which is disposed on the connecting plate.

9. The equipment for machining large cast iron parts using a CNC gantry milling machine according to claim 7, characterized in that, The positioning component includes: A support plate, wherein the support plate is disposed on one side of the cover plate; A third laser emitter is mounted on the support plate and is coaxial with the rotating shaft. A fixing seat is disposed on one side of the cover plate; The second laser receiver is mounted on the fixed base, and the center of the second laser receiver is on the central axis of the third laser emitter.

10. A method for machining large cast iron parts using a CNC gantry milling machine according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Adjustment and Fixation: Before drilling holes in the cast iron part, adjust and fix the position of the cast iron part using the adjustment device to prevent the drilled holes from tilting. Step 2, Measurement and Positioning: The location to be drilled is laser-positioned using a positioning device; 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, Positioning Correction: After drilling, the second laser receiver receives the laser signal and adjusts the position of the positioning device to correct the offset caused by the process. Step 5, Drilling in opposite directions: The center of the opposite hole is determined by emitting a laser from the center of the hole axis using a hole-aligning device.

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