Numerical control gantry milling machine for metal processing

Abstract

The application belongs to the technical field of milling machines, in particular to a numerical control gantry milling machine for metal processing, which comprises a base, a workbench is installed at the top end of the base, a gantry is arranged above the base, a moving table is slidably connected to one side of the gantry, a lifting frame is installed in the moving table, a side milling head is installed at the bottom end of the lifting frame, a milling cutter is installed at the rotating shaft end of the side milling head, a supporting cylinder is arranged below the side milling head, a sliding plate is slidably connected in the supporting cylinder, a connecting rod is fixed to one end of the sliding plate, and a first spring is fixed to the side of the sliding plate away from the connecting rod; the supporting cylinder, the sliding plate, the first spring and the connecting rod structure are arranged below the side milling head, when a crack appears in the connecting rib during the milling process, the elastic force of the first spring pushes the sliding plate, the sliding plate pushes the metal waste through the connecting rod to drive the connecting rib to actively tear, so that the metal waste and the connecting rib are separated from the metal piece in time, and the side edge and the bottom edge of the milling cutter are prevented from being damaged by the swinging impact of the metal waste.

Description

Technical Field

[0001] This invention belongs to the field of milling machine technology, specifically a CNC gantry milling machine for metal processing. Background Technology

[0002] CNC gantry milling machines are high-precision machine tools used for milling large metal parts, and are widely used in mold manufacturing, aerospace, shipbuilding, and heavy machinery. Through a gantry structure, the milling cutter moves in the X, Y, and Z directions, and in conjunction with the feed motion of the worktable, it can perform various machining operations on the surface of metal parts, such as milling holes, slots, and planes.

[0003] A patent application with publication number CN122184441A discloses a metal CNC gantry milling machine, including a machine tool support frame, a milling assembly connected to the upper side of the machine tool support frame, a scanning module installed on the execution end of the milling assembly, a movable worktable movably installed on the upper side of the machine tool support frame, and a chip removal module connected to the side of the machine tool support frame. The milling assembly is used to perform milling on the workpiece. The structure of the milling assembly, scanning module, and movable worktable ensures that each workpiece can be aligned with the tool in the exact same posture and position. Compared with manual alignment or ordinary machine tool dial indicator alignment, it avoids problems such as uneven machining, overcutting, or undercutting caused by positioning deviation, thus improving the consistency and stability of batch processing.

[0004] In actual processing, when using a CNC gantry milling machine to mill holes on the side of a metal part, the milled metal portion forms metal scrap. This metal scrap is connected to the metal part body through connecting ribs that are not completely severed. The metal scrap is very easy to be thrown under the action of milling force. The thrown metal scrap will hit the side and bottom edges of the milling cutter, causing damage such as chipping, accelerated wear, or even breakage of the milling cutter. Currently, when the connecting ribs are in a semi-connected state, the operator usually manually separates the metal scrap from the metal part. This method increases the labor intensity and safety risks of the operator and will also interrupt the processing flow.

[0005] Therefore, the present invention provides a CNC gantry milling machine for metal processing. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A CNC gantry milling machine for metal processing according to the present invention includes a base, a worktable installed at the top of the base, a gantry frame arranged above the base, a movable table slidably connected to one side of the gantry frame, a lifting frame installed inside the movable table, a side milling head installed at the bottom of the lifting frame, a milling cutter installed at the end of the rotating shaft of the side milling head, a support cylinder arranged below the side milling head, a sliding plate slidably connected inside the support cylinder, a connecting rod fixed to one end of the sliding plate, the connecting rod extending from inside the support cylinder, a first spring fixed to the side of the sliding plate away from the connecting rod, the other end of the first spring fixedly connected to the support cylinder, and a metal part can be placed at the top of the worktable; During the milling process, metal scrap and connecting ribs are generated on one side of the metal part. The elastic force of the first spring pushes the sliding plate, causing the connecting rod to push the metal scrap, connecting ribs and metal part apart.

[0008] Preferably, a ring is fixed to the outside of the side milling head, a rotating ring is sleeved on the outside of the ring, a connecting cylinder is fixed to the bottom end of the rotating ring, and the support cylinder is disposed below the connecting cylinder.

[0009] Preferably, a telescopic cylinder is fixed to the top of the support cylinder, a first motor is installed inside the connecting cylinder, the telescopic cylinder is slidably connected inside the connecting cylinder, a threaded rod is fixed to the end of the shaft of the first motor, and the end of the threaded rod is threadedly connected inside the telescopic cylinder.

[0010] Preferably, a connecting plate is fixed to the end of the connecting rod, a support frame is rotatably connected to the other side of the connecting plate, multiple pressure columns are fixed to the outside of the support frame, guide grooves are provided on both sides of the sliding plate, two guide rails are fixed inside the support cylinder, and the guide grooves are slidably connected to the outside of the guide rails.

[0011] Preferably, the surface of the pressure column is provided with a plurality of anti-slip grooves at equal intervals, and the anti-slip grooves are distributed at equal intervals on the surface of the pressure column.

[0012] Preferably, the pressure column has a cavity inside, and a hammer block is slidably connected inside the cavity. A second spring is fixed to one side of the hammer block, and the other end of the second spring is fixedly connected to the inner wall of the cavity. A triggering component is provided on one side of the hammer block.

[0013] Preferably, the triggering component includes a pull rod fixed to the hammer block near the middle of the second spring, the other end of the pull rod extending to the outside of the pressure column, a rotating rod rotatably connected to one side of the support frame, one end of the rotating rod being slidably connected to the second spring, and a push column fixed to the other end of the rotating rod. An annular groove is formed on the side of the connecting plate near the support frame, and multiple inclined blocks are fixed at equal intervals inside the annular groove. The end of the push column is slidably connected inside the annular groove.

[0014] Preferably, the end of the rotating rod away from the push column has a sliding hole, and the sliding hole is slidably connected to the end of the pull rod.

[0015] Preferably, a storage groove is provided at one end of the pressure column near the anti-slip groove, and a rotating bar is provided inside the storage groove. The rotating bar is rotatably connected to one end of the storage groove, and a torsion spring is fixed at the end of the rotating shaft of the rotating bar. The other end of the torsion spring is fixedly connected to the pressure column.

[0016] Preferably, a second motor is installed at the top of the workbench, a rotating frame is fixed to the end of the rotating shaft of the second motor, a cylinder is installed on one side of the rotating frame, and a plug is fixed to the end of the output shaft of the cylinder, the plug being able to be inserted into the interior of the metal part.

[0017] The beneficial effects of this invention are as follows: 1. The CNC gantry milling machine for metal processing described in this invention, by setting a support cylinder, a sliding plate, a first spring and a connecting rod structure below the side milling head, when a crack appears in the connecting rib during the milling process, the elastic force of the first spring pushes the sliding plate, and the sliding plate pushes the metal scrap through the connecting rod to actively tear the connecting rib, so that the metal scrap and the connecting rib are separated from the metal part in time, avoiding the metal scrap from swinging and hitting the side and bottom edges of the milling cutter and causing damage to the milling cutter, and effectively extending the service life of the milling cutter.

[0018] 2. The CNC gantry milling machine for metal processing described in this invention, by setting a hammer block, a second spring, and a triggering assembly consisting of a rotating rod, a pull rod, an inclined block, and an annular groove inside the pressure column, utilizes the periodic push of the push column by the inclined block when the rotating ring rotates relative to the pressure column, causing the second spring to be repeatedly compressed and released. The hammer block periodically strikes the inner wall of the cavity, transmitting the impact force to the metal scrap and connecting ribs. When the elasticity of the first spring is insufficient, it assists in tearing and separating the connecting ribs, further improving the separation efficiency and reliability of metal scrap and connecting ribs. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the side milling head structure in this invention; Figure 3 This is a schematic diagram of the internal structure of the rotating ring in this invention; Figure 4 This is a schematic diagram of the connecting disk structure in this invention; Figure 5 This is a schematic diagram of the support frame structure in this invention; Figure 6 This is a schematic diagram of the internal structure of the pressure column in this invention; Figure 7 yes Figure 6 Enlarged view of a portion of point A in the middle; Figure 8 This is a schematic diagram of the rotating frame structure in this invention; Figure 9 This is a schematic diagram of the metal component structure in this invention.

[0021] In the diagram: 1. Base; 11. Workbench; 12. Gantry frame; 121. Moving table; 122. Lifting frame; 123. Side milling head; 124. Milling cutter; 13. Rotary ring; 131. Connecting cylinder; 132. First motor; 133. Threaded rod; 134. Telescopic cylinder; 135. Support cylinder; 136. First spring; 137. Sliding plate; 138. Guide groove; 139. Guide rail; 14. Support frame; 141. Pressure column; 14 2. Anti-slip groove; 143. Connecting plate; 144. Ring groove; 145. Inclined block; 146. Rotating rod; 1461. Push column; 1462. Sliding hole; 147. Pull rod; 148. Second spring; 149. Hammering block; 15. Rotating bar; 151. Storage groove; 152. Torsion spring; 16. Rotating frame; 161. Second motor; 162. Cylinder; 163. Insert bracket; 2. Metal parts; 21. Metal scrap; 22. Connecting rib. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 9As shown in the embodiment of the present invention, a CNC gantry milling machine for metal processing includes a base 1, a worktable 11 is installed at the top of the base 1, a gantry frame 12 is arranged above the base 1, a movable table 121 is slidably connected to one side of the gantry frame 12, a lifting frame 122 is installed inside the movable table 121, a side milling head 123 is installed at the bottom of the lifting frame 122, a milling cutter 124 is installed at the end of the rotating shaft of the side milling head 123, a support cylinder 135 is arranged below the side milling head 123, a sliding plate 137 is slidably connected inside the support cylinder 135, a connecting rod is fixed at one end of the sliding plate 137 and extends out from inside the support cylinder 135, a first spring 136 is fixed on the side of the sliding plate 137 away from the connecting rod, and the other end of the first spring 136 is fixedly connected to the support cylinder 135. A metal part 2 can be placed at the top of the worktable 11. During the milling process of the milling cutter 124, metal scrap 21 and connecting rib 22 are generated on one side of the metal part 2. The elastic force of the first spring 136 pushes the sliding plate 137 to cause the connecting rod to push the metal scrap 21, connecting rib 22 and metal part 2 to separate.

[0024] During the processing of metal part 2, milling is required on its surface. This milling is performed using a CNC gantry milling machine. During processing, a side milling head 123 is mounted on the bottom of the lifting frame 122. Then, metal part 2 is placed on the top of the worktable 11 and fixed therewith using fasteners. During processing, the worktable 11 moves along the Y-axis, the moving table 121 moves along the X-axis, and the lifting frame 122 moves along the Z-axis. The operator controls the movement of the worktable 11, moving table 121, and lifting frame 122 via a controller. During processing, the moving table 121 moves the lifting frame 122 towards the side of metal part 2 where milling is required. Then, the lifting frame 122 moves downwards, moving the side milling head 123 and milling cutter 124 to the center of the side of metal part 2 where milling is required. The moving table 121 moves the entire assembly closer to metal part 2, and simultaneously, the spindle motor inside the lifting frame 122 is activated, driving the side milling head 123... The rotating shaft rotates, causing the milling cutter 124 to rotate. When the milling cutter 124 approaches the metal part 2, it pre-drills a recess on the surface of the metal part 2 for positioning. Then, the operator inputs the required milling diameter into the control terminal. The lifting frame 122 drives the side milling head 123 and the milling cutter 124 to rise onto the milling path. Then, the moving table 121 drives the milling cutter 124 to approach the metal part 2 for milling. At the same time, the lifting frame 122 drives the side milling head 123 and the milling cutter 124 to rise and fall, and the worktable 11 drives the metal part 2 to rise and fall. The worktable 11 and the lifting frame 122 move back and forth, and the milling cutter 124 moves in a circle around the pit on one side of the metal workpiece 2 through the movement of the worktable 11 and the lifting frame 122. During the milling process, the moving table 121 slowly moves towards the metal workpiece 2, so that the milling depth of the milling cutter 124 gradually increases. When the milling reaches a certain depth, metal scrap 21 and connecting rib 22 are generated on one side of the metal workpiece 2. When the connecting rib 22 is completely milled, the metal scrap 21 can be removed. At this time, the milling of one side of the metal workpiece 2 is completed. When the connecting rib 22 is milled to a relatively low thickness, a portion of the connecting rib 22 will separate from the metal part 2, creating a crack and resulting in a semi-connected state. At this point, the scrap metal 21 is only connected to the metal part 2 through the thin connecting rib 22, resulting in poor rigidity. If the milling cutter 124 continues to mill the connecting rib 22, the scrap metal 21 will swing, impacting the side and bottom edges of the milling cutter 124 and causing damage. Therefore, it is necessary for the operator to separate the scrap metal 21, connecting rib 22, and metal part 2 while they are in a semi-connected state. To facilitate separation, the separation is performed below the side milling head 123. When the milling cutter 124 mills the metal part 2, the support cylinder 135 moves forward with the side milling head 123. At this time, the connecting rod at the front end of the sliding plate 137 presses against the surface of the metal part 2. The connecting rod drives the sliding plate 137 to squeeze the first spring 136 inside the support cylinder 135. When a crack appears between the connecting rib 22 and the metal part 2, the elastic force of the first spring 136 pushes the sliding plate 137. The sliding plate 137 pushes the metal scrap 21 through the connecting rod, causing the connecting rib 22 to tear. At this time, the metal scrap 21 and the connecting rib 22 can be actively separated from the metal part 2, thereby avoiding damage caused by the metal scrap 21 swinging and hitting the milling cutter 124.

[0025] like Figures 1 to 3 As shown, a ring is fixed to the outside of the side milling head 123, and a rotating ring 13 is sleeved on the outside of the ring. A connecting cylinder 131 is fixed to the bottom end of the rotating ring 13, and a support cylinder 135 is located below the connecting cylinder 131.

[0026] During use, the connecting rod end of the sliding plate 137 presses against the center of the metal scrap 21. When the milling cutter 124 mills the hole, it will rotate in a circle. During this process, the position of the connecting rod will remain in the center, while the rotating ring 13 will rotate outside the ring body of the side milling head 123, thereby keeping the connecting rod always in the center of the metal scrap 21, which makes it easier to separate the metal scrap 21 and the connecting rib 22 from the metal part 2 later.

[0027] like Figures 1 to 3 As shown, a telescopic cylinder 134 is fixed to the top of the support cylinder 135, a first motor 132 is installed inside the connecting cylinder 131, the telescopic cylinder 134 is slidably connected inside the connecting cylinder 131, and a threaded rod 133 is fixed to the end of the shaft of the first motor 132, the end of the threaded rod 133 is threadedly connected to the inside of the telescopic cylinder 134.

[0028] During use, the diameter of the milled holes may be different. In order for the connecting rod to stably push the metal scrap 21, the first motor 132 is started to drive the threaded rod 133 to rotate. The threaded rod 133 drives the telescopic cylinder 134 to move inside the connecting cylinder 131. The telescopic cylinder 134 drives the support cylinder 135 to move, thereby adjusting the position of the connecting rod of the sliding plate 137.

[0029] like Figures 1 to 5 As shown, a connecting plate 143 is fixed to the end of the connecting rod, and a support frame 14 is rotatably connected to the other side of the connecting plate 143. Multiple pressure columns 141 are fixed to the outside of the support frame 14. Guide grooves 138 are provided on both sides of the sliding plate 137. Two guide rails 139 are fixed inside the support cylinder 135, and the guide grooves 138 are slidably connected to the outside of the guide rails 139.

[0030] When the connecting rod contacts the surface of the metal scrap 21, a support frame 14 is provided to increase the contact area of ​​the connecting rod. When the first spring 136 pushes the sliding plate 137, the sliding plate 137 pushes the connecting plate 143 through the connecting rod. The connecting plate 143 pushes the support frame 14 to press the pressure column 141 against the surface of the metal scrap 21. When the metal scrap 21 and the connecting rib 22 separate to one side, the pressure column 141 is closer to the outside, which allows the metal scrap 21 to be pushed a longer distance, thereby separating the metal scrap 21, the connecting rib 22 and the metal part 2 to a greater extent.

[0031] like Figures 1 to 2 As shown, multiple anti-slip grooves 142 are evenly spaced on the surface of the pressure column 141. The anti-slip grooves 142 are evenly distributed on the surface of the pressure column 141.

[0032] When the pressure column 141 comes into contact with the metal scrap 21, the anti-slip groove 142 can increase the friction between the pressure column 141 and the metal scrap 21, thereby making the contact between the pressure column 141 and the metal scrap 21 more stable. When the rotating ring 13 rotates, the support frame 14 and the pressure column 141 can remain fixed, thereby keeping the support frame 14 in the center of the metal scrap 21, which is convenient for pushing the metal scrap 21 and the connecting rib 22 in the future.

[0033] like Figures 1 to 6 As shown, the pressure column 141 has a cavity inside, and a hammer block 149 is slidably connected inside the cavity. A second spring 148 is fixed to one side of the hammer block 149, and the other end of the second spring 148 is fixedly connected to the inner wall of the cavity. A triggering component is provided on one side of the hammer block 149.

[0034] During the milling process, because the connecting rib 22 connects the metal part 2 and the scrap metal 21 together, when one side of the connecting rib 22 opens, the elastic force of the first spring 136 cannot push the pressure column 141 to tear the connecting rib 22. Therefore, during the milling process of the milling cutter 124 moving circumferentially to mill the hole in the metal part 2, the trigger assembly pulls the hammer block 149 to move inside the cavity. During the movement, the hammer block 149 squeezes the second spring 148 to compress it. When the second spring 148 is compressed to its limit... When in the state, the trigger component releases the hammer block 149. At this time, the elastic force of the second spring 148 pushes the hammer block 149 to automatically reset. The hammer block 149 strikes the inner wall of the cavity, and the striking force is transmitted to the pressure column 141. At this time, the pressure column 141 transmits the striking force to the metal scrap 21. The metal scrap 21 drives the connecting rib 22 to generate a tearing force, so that the connecting rib 22 is torn apart from the opening side of the metal part 2, making it easier for the metal scrap 21, the connecting rib 22 and the metal part 2 to separate.

[0035] like Figures 1 to 6 As shown, the triggering assembly includes a pull rod 147 fixed to the hammer block 149 near the middle of the second spring 148. The other end of the pull rod 147 extends to the outside of the pressure column 141. A rotating rod 146 is rotatably connected to one side of the support frame 14. One end of the rotating rod 146 is slidably connected to the second spring 148. A push column 1461 is fixed to the other end of the rotating rod 146. An annular groove 144 is opened on the side of the connecting plate 143 near the support frame 14. Multiple inclined blocks 145 are fixed at equal intervals inside the annular groove 144. The end of the push column 1461 is slidably connected inside the annular groove 144.

[0036] During use, the rotating ring 13 drives the support cylinder 135 to rotate, but the pressure column 141 presses against the surface of the metal scrap 21. The pressure column 141 and the support frame 14 remain fixed. Therefore, the connecting plate 143 maintains a relative rotational state at this time. When the connecting plate 143 rotates, the push column 1461 slides inside the annular groove 144. During this process, the inclined block 145 rotates synchronously with the connecting plate 143. When the inclined block 145 rotates to the end that contacts the push column 1461, the inclined surface of the inclined block 145 pushes the push column 1461 closer to the support frame 14. At this time, the push column 1461 pushes the other end of the rotating rod 146 to tilt up. During the tilting process of the rotating rod 146, it will... Pull rod 147 is pulled to one side of connecting plate 143 by the outer end. At this time, pull rod 147 pulls hammer block 149 to squeeze second spring 148. When push column 1461 slides to the end of inclined surface of inclined block 145, second spring 148 is squeezed to the limit. Then, the other side surface of inclined block 145 is at 90° with the inner wall of annular groove 144. Therefore, when push column 1461 slides past inclined block 145, it loses its pushing force. At this time, second spring 148 loses its squeezing force. The elastic force of second spring 148 pushes hammer block 149 to automatically reset and strike the cavity of pressure column 141, thereby assisting in the separation of metal scrap 21 and connecting rib 22 from metal part 2.

[0037] like Figures 1 to 6 As shown, the end of the rotating rod 146 away from the push post 1461 has a sliding hole 1462, and the sliding hole 1462 is slidably connected to the end of the pull rod 147.

[0038] During use, both ends of the rotating rod 146 will be tilted upwards. When the push post 1461 is pushed, its end position will change to a certain extent. At the same time, the connection between the other end of the rotating rod 146 and the end of the pull rod 147 will also change. The annular groove 144 is wide enough to accommodate the change in the position of the push post 1461. The rotating rod 146 and the pull rod 147 are connected by a sliding hole 1462. The sliding hole 1462 allows the pull rod 147 to slide a certain distance, so that the rotating rod 146 can adaptively change the connection position with the pull rod 147, preventing interference at the connection between the rotating rod 146 and the pull rod 147.

[0039] like Figures 1 to 7 As shown, a storage groove 151 is provided at one end of the pressure column 141 near the anti-slip groove 142. A rotating bar 15 is provided inside the storage groove 151. The rotating bar 15 is rotatably connected to one end of the storage groove 151. A torsion spring 152 is fixed at the end of the rotating shaft of the rotating bar 15. The other end of the torsion spring 152 is fixedly connected to the pressure column 141.

[0040] When the pressure column 141 pushes the scrap metal 21 and the connecting rib 22 to one side, the pressure column 141 and the scrap metal 21 are in point contact. At this time, the pushing of the scrap metal 21 by the pressure column 141 is not stable enough, which can easily cause the scrap metal 21 and the connecting rib 22 to shift to one side. Therefore, a rotating bar 15 is provided. When the pressure column 141 pushes the scrap metal 21, the side of the scrap metal 21 that is pushed and rotated presses the end of the rotating bar 15. At this time, due to the lever principle, the rotating bar 15 will rotate out from the inside of the receiving groove 151. At this time, the rotating bar 15 will be in close contact with the surface of the scrap metal 21, so that the scrap metal 21 is in surface connection with the pressure column 141 through the rotating bar 15, making the process of the pressure column 141 pushing the scrap metal 21 more stable.

[0041] like Figures 1 to 8 As shown, a second motor 161 is installed at the top of the workbench 11. A rotating frame 16 is fixed to the end of the rotating shaft of the second motor 161. A cylinder 162 is installed on one side of the rotating frame 16. A plug 163 is fixed to the end of the output shaft of the cylinder 162. The plug 163 can be inserted into the interior of the metal part 2.

[0042] During use, when the support frame 14 pushes the metal scrap 21 into the interior of the metal part 2, the connecting rib 22 may still be connected to the metal part 2. At this time, the second motor 161 drives the rotating frame 16 to rotate, causing the rotating frame 16 to drive the cylinder 162 to rotate above the metal part 2. Then, the cylinder 162 pushes the insert 163 downward. When the insert 163 extends downward, it contacts the metal scrap 21 and the connecting rib 22, which can scrape off and separate the metal scrap 21 and the connecting rib 22 from the inside of the metal part 2. At the same time, the insert 163 can be inserted into the side of the support frame 14 away from the connecting plate 143. At this time, the support frame 14 placed inside the metal part 2 can be fixed, preventing the pressure column 141 from contacting the hole of the metal part 2 before the milling cutter 124 completes the milling, thus interfering with the milling work of the milling cutter 124.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CNC gantry milling machine for metal processing, characterized in that: The system includes a base (1), a workbench (11) is mounted on the top of the base (1), a gantry frame (12) is mounted above the base (1), a moving platform (121) is slidably connected to one side of the gantry frame (12), a lifting frame (122) is mounted inside the moving platform (121), a side milling head (123) is mounted at the bottom of the lifting frame (122), a milling cutter (124) is mounted at the end of the rotating shaft of the side milling head (123), a support cylinder (135) is provided below the side milling head (123), a sliding plate (137) is slidably connected inside the support cylinder (135), a connecting rod is fixed at one end of the sliding plate (137), the connecting rod extends out from inside the support cylinder (135), a first spring (136) is fixed on the side of the sliding plate (137) away from the connecting rod, the other end of the first spring (136) is fixedly connected to the support cylinder (135), and a metal part (2) can be placed on the top of the workbench (11). During the milling process of the milling cutter (124), metal scrap (21) and connecting rib (22) are generated on one side of the metal part (2). The elastic force of the first spring (136) pushes the sliding plate (137) to cause the connecting rod to push the metal scrap (21), connecting rib (22) and metal part (2) to separate. The side milling head (123) is fixed with a ring body, and a rotating ring (13) is sleeved on the outside of the ring body. A connecting cylinder (131) is fixed at the bottom end of the rotating ring (13), and the support cylinder (135) is located below the connecting cylinder (131). The top end of the support cylinder (135) is fixed with a telescopic cylinder (134), the inside of the connecting cylinder (131) is equipped with a first motor (132), the telescopic cylinder (134) is slidably connected to the inside of the connecting cylinder (131), the end of the shaft of the first motor (132) is fixed with a threaded rod (133), and the end of the threaded rod (133) is threadedly connected to the inside of the telescopic cylinder (134). The end of the connecting rod is fixed with a connecting plate (143), and the other side of the connecting plate (143) is rotatably connected with a support frame (14). Multiple pressure columns (141) are fixed on the outside of the support frame (14). Guide grooves (138) are provided on both sides of the sliding plate (137). Two guide rails (139) are fixed inside the support cylinder (135). The guide grooves (138) are slidably connected to the outside of the guide rails (139). The pressure column (141) has a cavity inside, and a hammer block (149) is slidably connected inside the cavity. A second spring (148) is fixed on one side of the hammer block (149), and the other end of the second spring (148) is fixedly connected to the inner wall of the cavity. A triggering component is provided on one side of the hammer block (149). The triggering assembly includes a pull rod (147) fixed to the middle of the hammer block (149) near the second spring (148), the other end of the pull rod (147) extending to the outside of the pressure column (141), a rotating rod (146) rotatably connected to one side of the support frame (14), one end of the rotating rod (146) being slidably connected to the pull rod (147), and a push column (1461) fixed to the other end of the rotating rod (146). An annular groove (144) is provided on the side of the connecting plate (143) near the support frame (14), and multiple inclined blocks (145) are fixed at equal intervals inside the annular groove (144). The end of the push column (1461) is slidably connected inside the annular groove (144). The rotating rod (146) has a sliding hole (1462) at the end away from the push column (1461), and the sliding hole (1462) is slidably connected to the end of the pull rod (147).

2. The CNC gantry milling machine for metal processing according to claim 1, characterized in that: The surface of the pressure column (141) is provided with a plurality of anti-slip grooves (142) at equal intervals, and the anti-slip grooves (142) are distributed at equal intervals on the surface of the pressure column (141).

3. The CNC gantry milling machine for metal processing according to claim 2, characterized in that: The pressure column (141) has a storage groove (151) at one end near the anti-slip groove (142). A rotating bar (15) is provided inside the storage groove (151). The rotating bar (15) is rotatably connected to one end of the storage groove (151). A torsion spring (152) is fixed at the end of the rotating shaft of the rotating bar (15). The other end of the torsion spring (152) is fixedly connected to the pressure column (141).

4. A CNC gantry milling machine for metal processing according to claim 2, characterized in that: The top of the workbench (11) is equipped with a second motor (161), and a rotating frame (16) is fixed to the end of the rotating shaft of the second motor (161). A cylinder (162) is installed on one side of the rotating frame (16), and a plug (163) is fixed to the end of the output shaft of the cylinder (162). The plug (163) can be inserted into the interior of the metal part (2).

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