Numerical control drilling machine for machining die assembly

Abstract

The invention relates to the technical field of mold machining, in particular to a numerical control drilling machine for mold assembly machining. Comprising a base and a supporting seat installed on the base. A drilling mechanism is arranged on the supporting seat; the double twist drills are driven by the driving part to achieve synchronous back-to-back drilling in a rigid frame formed by the fixed seat and the sliding seat, the efficiency bottleneck of single-spindle sequential operation is broken through in a parallel machining mode, and machining vibration is effectively restrained by forming a force closed loop through generated reverse cutting force; meanwhile, the chip removing part is used for removing chips through extrusion supporting and moving of the push rod in the U-shaped chip groove of the twist drill, directional spraying of the spraying pipe is matched, automatic removing, cooling and lubricating of the chips are achieved, and therefore the technical problems of low efficiency, vibration deflection and chip winding existing in circular mold drilling are solved cooperatively on the whole.

Description

Technical Field

[0001] This invention relates to the field of mold processing technology, and in particular to a CNC drilling machine for processing mold components. Background Technology

[0002] A ring die is a porous annular mold whose function is to force powdered raw materials through the die holes under the pressure of rollers to form high-density cylindrical particles. It is used in biomass fuel pellet mills, large-diameter feed ring dies, and organic fertilizer pellet mills. The diameter of the working hole of the ring die usually falls within the range of 10mm to 20mm. Currently, existing technologies generally use a single spindle and single-sided up-and-down moving feed method for drilling operations. In this type of processing, twist drills are widely used due to their strong versatility and low cost. Especially when processing larger diameter holes, it is standard practice in the industry to select twist drills with larger diameters. It should be noted that in existing technologies, larger diameter twist drills are usually designed with no fewer than two U-shaped chip removal grooves. This multi-groove structure is the standard design for large diameter twist drills. Its main purpose is to improve chip removal performance and enhance the strength of the drill body structure. The symmetrical distribution of multiple U-shaped chip removal grooves gives the twist drill good dynamic balance characteristics, which provides a basic guarantee for the stability of the drilling process.

[0003] However, the following problems exist in the current ring die drilling process: First, the serial operation mode of single-spindle sequential drilling results in low processing efficiency, which cannot meet the demand for efficiency improvement in modern production; second, the long chips generated during processing will wrap around the twist drill, which not only hinders the effective delivery of cutting fluid and chip removal, but also increases drilling torque and causes vibration, directly affecting drilling accuracy and surface quality; third, the existing technology lacks automatic chip removal methods synchronized with the processing process, which requires frequent machine shutdowns for manual cleaning. This increases the labor intensity and safety hazards of operators, and seriously disrupts the continuity of the production process, making automated assembly line operations difficult to achieve. Thus, efficiency, quality, and automation levels jointly restrict the improvement of ring die manufacturing level.

[0004] Therefore, the efficiency bottleneck of single-spindle sequential drilling, the decrease in accuracy caused by chip entanglement, and the interruption of automated production are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, the present invention provides a CNC drilling machine for machining mold components to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a CNC drilling machine for processing mold components, comprising a base and a support mounted thereon; the support is provided with a drilling mechanism.

[0007] The drilling mechanism includes a fixed base with a concave structure that is fixedly mounted on a support base. Two symmetrical slide blocks are slidably mounted on the fixed base. A cantilever is fixedly mounted on the right end of each slide block. A rotary spindle is fixedly mounted on the cantilever. A chuck is fixedly mounted on the output section of the rotary spindle. A twist drill is mounted on the chuck. A drive unit is provided on the fixed base.

[0008] The chuck is equipped with a chip removal part, which includes a fixed cylinder fixedly installed on the chuck. A ring plate is movably sleeved on the fixed cylinder. Fixed rings are fixedly installed on the opposite ends of the two ring plates through support columns. A mounting ring is coaxially rotatable on the fixed ring. A pair of push rods can be detachably installed on the opposite ends of the two rotating rings. Two slots are opened on the fixed ring, and a spray pipe is rotatably installed in the slot. An adjustment part is provided on the fixed ring, a push-pull part is provided on the cantilever, and a linkage part is provided on the rotating ring.

[0009] The drive unit drives two twist drills to drill holes in the ring die simultaneously, while the reverse cutting force forms a closed loop of force within the rigid frame composed of the fixed seat and the slide. During drilling, the push rod continuously squeezes the inner wall of the U-shaped chip removal groove of the twist drill. During chip removal, it moves along the U-shaped chip removal groove and cooperates with the nozzle to spray cutting fluid to remove chips.

[0010] As a preferred embodiment, the drive unit includes a pair of limiting posts fixedly installed between two transverse sections of the fixed base. The limiting posts slide through the two slides, and a bidirectional screw is provided between the two limiting posts. The two ends of the bidirectional screw rotate through the two transverse sections of the fixed base, and the two slides are threadedly connected to the two threaded sections of the bidirectional screw. A servo motor with an output shaft fixedly connected to the bidirectional screw is fixedly installed at the rear end of the rear transverse section of the fixed base.

[0011] As a preferred embodiment, the linkage includes a slide tube. The slide tube is uniformly fixedly installed around the end of the rotating ring near the fixed cylinder. A slide column is slidably installed inside the slide tube. A compression spring is fixedly installed between the end of the slide column near the corresponding rotating ring and the rotating ring. A second ball is slidably installed at the end of the slide column away from the corresponding rotating ring. A limiting hole corresponding to the slide column is opened at the end of the fixed cylinder near the corresponding rotating ring.

[0012] As a preferred embodiment, the adjusting part includes a sleeve, and a section of the nozzle near the corresponding ring plate is slidably fitted with the sleeve. A connecting plate is rotatably mounted on the sleeve. A fixing plate located on the left side of the fixing cylinder is fixedly installed between the ring plate and the fixing ring. A bidirectional cylinder is fixedly installed at the left end of the fixing plate, and the two telescopic sections of the bidirectional cylinder are respectively fixedly connected to the two corresponding connecting plates.

[0013] As a preferred embodiment, the push-pull part includes a push-pull plate fixedly installed on the ring plate, and a telescopic cylinder fixedly installed at the upper end of the cantilever, with the telescopic section of the telescopic cylinder fixedly connected to the corresponding push-pull plate.

[0014] As a preferred embodiment, a reinforcing rod is installed obliquely between the lower end of the cantilever and the right end of the corresponding slide block, and the reinforcing rod, cantilever, and slide block form a stable triangular structure.

[0015] As a preferred embodiment, a connecting seat is fixedly installed at one end of the push rod near the corresponding rotating ring, and the connecting seat is fixedly connected to the rotating ring by bolts.

[0016] As a preferred embodiment, a No. 1 ball is rotatably mounted on the end of the push rod away from the rotating ring.

[0017] As a preferred embodiment, a plurality of reinforcing ribs are fixedly installed between the lower end of the fixed base and the right end of the support base.

[0018] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, the present invention drives the double twist drills to achieve synchronous back-to-back drilling within a rigid frame composed of a fixed seat and a slide seat through a drive unit. This not only breaks through the efficiency bottleneck of single-spindle sequential operation through parallel processing mode, but also effectively suppresses processing vibration by forming a force closed loop using the generated reverse cutting force. At the same time, the chip removal unit achieves automatic chip removal and cooling lubrication by squeezing and moving the push rod in the U-shaped chip removal groove of the twist drill, in conjunction with the directional spray of the nozzle. Thus, the technical problems of low efficiency, vibration sway and chip entanglement in ring die drilling are solved in a coordinated manner as a whole.

[0019] Second, this invention drives two slides to move synchronously and in opposite directions on a fixed base via a drive unit, enabling two twist drills to drill the ring die simultaneously. This parallel processing method based on a rigid frame significantly improves drilling efficiency. At the same time, the opposing cutting forces generated by the two twist drills form a force closed loop within the rigid frame, making the net external force acting on the machine tool system tend to be balanced, thus eliminating vibration during the drilling process and ensuring hole accuracy.

[0020] Third, this invention uses a push rod in the chip removal section to continuously press the inner wall of the U-shaped chip removal groove of the twist drill during drilling to enhance the rigidity of the drill bit. During the machining gap, the push rod is moved along the U-shaped chip removal groove by the push-pull section, while the adjustment section drives the nozzle to spray cutting fluid to assist in chip removal. This synergistic effect of mechanical chip removal and hydraulic flushing can effectively remove entangled chips and keep the cutting fluid channel unobstructed, thereby avoiding machining interruptions caused by chip accumulation and ensuring the continuity of automated production.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a partial structural diagram of the ring die during the processing of the present invention.

[0025] Figure 3 This is a schematic diagram of the drive unit of the present invention.

[0026] Figure 4 This is a schematic diagram of the linkage mechanism of the present invention.

[0027] Figure 5 This is a schematic diagram of the push-pull part of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure between the push rod, nozzle, and drill bit during chip removal according to the present invention.

[0029] Reference numerals: 10, base; 11, support base; 2, drilling mechanism; 20, fixed base; 200, reinforcing rib; 21, slide; 22, cantilever; 220, reinforcing rod; 23, angle spindle; 24, chuck; 25, twist drill; 3, chip removal part; 30, fixed cylinder; 31, ring plate; 32, fixed ring; 33, rotating ring; 34, push rod; 340, connecting base; 35, nozzle; 4, drive part; 40, limit post; 41, bidirectional screw; 42, servo motor; 5, linkage part; 50, slide tube; 51, slide column; 52, compression spring; 6, adjustment part; 60, sleeve; 61, connecting plate; 62, bidirectional cylinder; 7, push-pull part; 70, push-pull plate; 71, telescopic cylinder. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figure 1As shown, a CNC drilling machine for processing mold components includes a base 10 and a support 11 mounted thereon; a drilling mechanism 2 is provided on the support 11.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the drilling mechanism 2 includes a fixed base 20 with a concave structure, which is fixedly installed on the right end of the support base 11. Two symmetrical slide blocks 21 are slidably installed between the two transverse sections of the fixed base 20. A cantilever 22 is fixedly installed on the right end of each slide block 21. A rotary spindle 23 is fixedly installed on the right end of the cantilever 22. A chuck 24 is fixedly installed on the output section of the rotary spindle 23. A twist drill 25 is mounted on the chuck 24. A drive unit 4 is provided on the fixed base 20.

[0033] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the chuck 24 is equipped with a chip removal section 3, which includes a fixed cylinder 30 fixedly mounted on the chuck 24. A ring plate 31 is coaxially and movably sleeved on the fixed cylinder 30. Fixed rings 32 are fixedly mounted on the opposite ends of the two ring plates 31 via support columns. A rotating ring 33 is coaxially and rotatably mounted in the middle of the fixed ring 32. The fixed ring 32 and the rotating ring 33 are coaxially and rotatably connected by a tapered roller bearing. This bearing structure can simultaneously withstand radial and axial loads, effectively distributing the combined force generated by the push rod 34 during operation. This not only ensures the smoothness and accuracy of the rotating ring 33's rotation process, but also... The structural design fundamentally avoids the problem of wear and increased gaps in the connection parts caused by long-term alternating loads, thus ensuring the connection rigidity and working stability of the entire chip removal unit 3 under long-term use. A pair of push rods 34 can be detachably installed on the opposite ends of the two rotating rings 33. The ends of the two push rods 34 respectively abut against the inner walls of the two U-shaped chip removal grooves on the twist drill 25. The edge of the fixed ring 32 has two symmetrical slots, and the spray pipe 35 is rotatably installed in the slots. The fixed ring 32 is provided with an adjustment part 6, the cantilever 22 is provided with a push-pull part 7, and the rotating ring 33 is provided with a linkage part 5.

[0034] like Figures 1 to 6As shown, in specific operation, the ring die is fixed to the upper end of the base 10 by an external clamp, so that the two twist drills 25 are located inside the ring die and are symmetrical about the axis of the ring die. In addition, the external clamp can drive the fixed ring die to rotate circumferentially and move horizontally left and right. Since the external clamp is existing technology and not a technical point of this invention, it will not be described in detail here. In the initial state, the rotating ring 33 is linked with the fixed cylinder 30 through the linkage part 5. Thus, during the rotation of the twist drill 25 by the rotating spindle 23 through the chuck 24, the rotating ring 33 will rotate synchronously with the chuck 24 through the linkage part 5. The fixed ring 32, the support column and the ring plate 31 remain stationary. The end of the push rod 34 is pressed against the inner wall of the two U-shaped chip removal grooves on the corresponding twist drill 25 and the side close to the chuck 24 to improve the stability of the twist drill 25. The adjustment part 6 adjusts the angle of the nozzle 35 so that the axis of the nozzle 35 points to the end of the twist drill 25.

[0035] Then, the drive unit 4 drives the two slides 21 to move in opposite directions from their current origin positions, causing the two rotating twist drills 25 to simultaneously begin drilling the inner walls of the left and right sides of the ring die. This achieves the completion of two holes in the same time, thus doubling the drilling efficiency. During the machining process, the external pipe is connected to the nozzle 35 to supply cutting fluid. The cutting fluid is sprayed onto the machining area through the nozzle 35 to cool the ring die and the twist drills 25, thereby improving the quality and smoothness of the drilling and flushing away some debris. In addition, the huge axial cutting force generated when the two twist drills 25 are cutting simultaneously is in opposite directions. Since the two slides 21 are mounted on the same fixed base 20 and are linked by the bidirectional screw 41, this allows the two twist drills to... The reverse force generated by drill 25 is mutually canceled out within the rigid frame consisting of fixed seat 20, slide 21 and double screw 41, forming a highly efficient "force closed loop" system. This eliminates machining vibration and tool deflection, laying a solid foundation for obtaining extremely high hole straightness, dimensional consistency and smooth hole wall quality. At the same time, the horizontal drilling layout further enhances this advantage. It not only allows chips to fall off naturally under gravity, but also facilitates the high-pressure coolant to completely flush cutting heat and broken chips out of the hole. This effectively avoids the interference of chip accumulation in the hole with secondary cutting and machining accuracy, thus ensuring the ultra-stable state of the machining process and the precision of the final hole at both mechanical and chip removal levels.

[0036] After machining two holes simultaneously, the drive unit 4 drives the two twist drills 25 to move towards each other, disengaging from the ring die and returning to their original positions. Then, the external clamp drives the fixed ring die to move horizontally to the left a certain distance to machine the next hole. After machining a row of holes, the twist drills 25 return to their original positions, and the external clamp drives the ring die to rotate circumferentially by a certain angle to machine the next row of holes. During the rotation of the ring die, the adjustment unit 6 drives the nozzle 35 to rotate, so that the axis of the nozzle 35 points to the end of the push rod 34. Then, the push-pull unit 7 pushes the corresponding ring plate 31 to move towards the end of the corresponding twist drill 25. The ring plate 31 then pushes the fixed ring 32 and the rotating ring 33 to move synchronously through the support column. The rotating ring 33 then drives the push rod 34 to move... The screw drill 25 slides within the corresponding U-shaped chip removal groove and rotates accordingly. As the push rod 34 moves, it pushes the chips wrapped around the corresponding screw drill 25 away from the screw drill 25. The cutting fluid sprayed from the nozzle 35 assists in impacting the chips to detach from the screw drill 25, and also lubricates the push rod 34 and the screw drill 25, reducing the friction force on the push rod 34 and thus improving the smoothness of the push rod 34's movement and extending its service life. Therefore, the above method can promptly remove the chips covering the cutting area of ​​the screw drill 25, creating a good flow channel for the cutting fluid and ensuring that the high-pressure coolant can be directly sprayed to the machining hot spot area of ​​the screw drill 25, thereby greatly improving the cooling efficiency.

[0037] Furthermore, the necessity of using a double U-shaped chip-removing twist drill 25 is as follows: the total cutting force generated during drilling is more evenly distributed, and wide chips are divided into narrower ones. This design makes the twist drill 25 less prone to deviation during entry, allowing it to drill a deeper distance in one go without frequent retraction and chip removal. It also effectively reduces the risk of the twist drill 25 getting stuck or breaking due to chip blockage. Therefore, when machining a large number of dense holes on a ring die, it can more stably ensure the consistent quality of each hole and improve the overall machining efficiency.

[0038] like Figure 1 , Figure 2 and Figure 3 As shown, the drive unit 4 includes a pair of limiting posts 40 fixedly installed between two transverse sections of the fixed base 20. The limiting posts 40 slide through two slide blocks 21. A bidirectional screw 41 is provided between the two limiting posts 40. The two ends of the bidirectional screw 41 rotatably pass through the two transverse sections of the fixed base 20. The two slide blocks 21 are threadedly connected to the two threaded sections of the bidirectional screw 41 respectively. A servo motor 42 with an output shaft fixedly connected to the bidirectional screw 41 is fixedly installed at the rear end of the rear transverse section of the fixed base 20.

[0039] like Figure 1 and Figure 3As shown, a reinforcing rod 220 is installed obliquely between the lower end of the cantilever 22 and the right end of the corresponding slide 21. The reinforcing rod 220, the cantilever 22 and the slide 21 form a stable triangular structure.

[0040] like Figure 1 and Figure 2 As shown, multiple reinforcing ribs 200 are fixedly installed between the lower end of the fixed base 20 and the right end of the support base 11. These reinforcing ribs 200 greatly enhance the connection rigidity and structural stability between the fixed base 20 and the support base 11, ensuring that the installation foundation of the entire drilling mechanism 2 will not deform or vibrate when subjected to the internal stress brought about by the "force closed loop", thus providing a solid foundation for high-precision drilling.

[0041] like Figure 4 , Figure 5 and Figure 6 As shown, the linkage part 5 includes a slide tube 50. The slide tube 50 is uniformly fixedly installed along the circumference of the end of the rotating ring 33 near the fixed cylinder 30. A slide column 51 is slidably installed inside the slide tube 50. A compression spring 52 is fixedly installed between the end of the slide column 51 near the corresponding rotating ring 33 and the rotating ring 33. A second ball is rolledly installed at the end of the slide column 51 away from the corresponding rotating ring 33. A limiting hole corresponding to the slide column 51 is opened at the end of the fixed cylinder 30 near the corresponding rotating ring 33.

[0042] like Figure 3 and Figure 5 As shown, the push-pull part 7 includes a push-pull plate 70 fixedly installed on the ring plate 31, and a telescopic cylinder 71 is fixedly installed at the upper end of the cantilever 22. The telescopic section of the telescopic cylinder 71 is fixedly connected to the corresponding push-pull plate 70.

[0043] like Figures 1 to 6As shown, during actual operation, the servo motor 42 drives the bidirectional screw 41 to rotate, which in turn drives the two slide blocks 21 to move in opposite directions, thereby driving the two twist drills 25 to process two holes simultaneously, improving processing efficiency and drilling stability. After processing a row of holes, the servo motor 42 rotates in the opposite direction, driving the bidirectional screw 41 to reverse. The bidirectional screw 41 then drives the two slide blocks 21 to move towards each other and reset. Then, the telescopic cylinder 71 pushes the corresponding ring plate 31 away from the corresponding corner spindle 23 via the push-pull plate 70. The ring plate 31 then pushes the fixed ring 32 and the rotating ring 33 to move synchronously via the support column. The movement of the rotating ring 33 causes the push rod 34 to slide within the U-shaped chip removal groove of the twist drill 25. As the push rod 34 abuts against the inner wall of the U-shaped chip removal groove of the twist drill 25, the twist drill 25 will rotate accordingly. The twist drill 25 will simultaneously drive the chuck 24 and the fixed cylinder 30 to rotate. Since the sliding pin 51 is inserted into the corresponding limiting hole at this time, the rotating ring 33 also rotates accordingly. Thus, the rotating ring 33 moves away from the corresponding corner spindle 23 while rotating until the sliding pin 51 disengages from the limiting hole. Afterward, as the rotating ring 33 moves, the push rod 34 pushes out the chips wrapped around the twist drill 25 and removes them from the twist drill 25.

[0044] Afterwards, the telescopic cylinder 71 pulls the corresponding ring plate 31 close to the corresponding corner spindle 23 via the corresponding push-pull plate 70. The slide column 51 will first contact the fixed cylinder 30 through the second ball. The slide column 51 cannot get closer to the corner spindle 23 and remains stationary, while the rotating ring 33 continues to move and compresses the compression spring 52. Since the push rod 34 slides within the U-shaped chip removal of the twist drill 25, both the rotating ring 33 and the fixed cylinder 30 will rotate. The slide column 51 will then make rolling friction contact with the fixed cylinder 30 through the second ball to reduce friction and extend the service life of the slide column 51 and the fixed cylinder 30. Afterwards, when the slide column 51 rotates to be coaxial with the corresponding limit hole, the slide column 51 will move and insert into the corresponding limit hole under the action of the compression spring 52, so that the rotating ring 33, the fixed cylinder 30, the chuck 24, and the twist drill 25 rotate synchronously and at the same speed. At this time, the machining of the hole in the next area of ​​the ring die can be carried out.

[0045] like Figure 3 and Figure 5 As shown, the adjusting part 6 includes a sleeve 60. The sleeve 60 is slidably sleeved on a section of the nozzle 35 near the corresponding ring plate 31. A connecting plate 61 is rotatably mounted on the sleeve 60. A fixing plate located on the left side of the fixing cylinder 30 is fixedly installed between the ring plate 31 and the fixing ring 32. A bidirectional cylinder 62 is fixedly installed on the left end of the fixing plate. The two telescopic sections of the bidirectional cylinder 62 are respectively fixedly connected to the two corresponding connecting plates 61.

[0046] like Figure 5 and Figure 6As shown, a connecting seat 340 is fixedly installed at one end of the push rod 34 near the corresponding rotating ring 33. The connecting seat 340 is fixedly connected to the rotating ring 33 by bolts. This detachable structure not only ensures the reliability of force transmission of the push rod 34 during the chip removal process, but also facilitates the individual disassembly and replacement of the push rod 34 after wear, thereby significantly reducing maintenance costs and time. At the same time, the bolt connection method allows the initial extrusion force of the push rod 34 on the groove wall of the twist drill 25 to be finely adjusted by adjusting the tightening torque, providing a precise adjustment means to achieve the best support effect and avoid overload damage.

[0047] like Figure 5 and Figure 6 As shown, a ball bearing is rolled at the end of the push rod 34 away from the rotating ring 33, so that when the push rod 34 contacts and moves relative to the inner wall of the U-shaped chip removal groove of the twist drill 25, the sliding friction is converted into rolling friction. This not only smoothly pushes off the chips, but more importantly, it significantly reduces frictional resistance and wear on the drill groove, effectively protecting the twist drill 25 from damage and extending the service life of the push rod 34 itself.

[0048] like Figure 3 , Figure 5 and Figure 6 As shown, during operation, the bidirectional cylinder 62 pushes the two sleeves 60 away from each other via the corresponding connecting plate 61. The sleeves 60 pull the corresponding nozzles 35 to rotate, and the nozzles 35 slide on the corresponding sleeves 60. As the sleeves 60 move, the nozzles 35 rotate until their axis points to the end of the push rod 34. At this time, the high-pressure cutting fluid sprayed from the nozzles 35 has three key functions: first, it directly impacts the root of the wrapped chips, weakening their wrapping strength; second, it forms a lubricating film between the push rod 34 and the groove wall of the twist drill 25, and through the rolling cooperation of the first ball, it converts sliding friction into rolling friction, significantly reducing motion resistance; finally, it washes away the detached chips. This combination of directional spraying and the mechanical action of the push rod 34 ensures that the chips are completely removed and that the push rod 34 works stably under low wear conditions.

[0049] Furthermore, the technical solution proposed in this invention possesses sufficient rationality and indispensable practicality. Its design is entirely based on the core problems of poor chip removal and low efficiency that actually exist in ring die drilling. By adopting a back-to-back drilling layout of double twist drills 25, and ensuring that the reverse cutting force generated by them forms a force closed loop within a rigid frame composed of fixed seat 20, slide 21, and bidirectional screw 41, this design eliminates machining vibration and tool deflection from a mechanical perspective, providing a decisive guarantee for high-precision drilling. At the same time, the parallel operation mode of the double twist drills 25 changes the traditional single-axis sequential machining method, resulting in a substantial increase in drilling efficiency. The pusher integrated into the chuck 24... The rod 34, through its detachable connection structure and adjustable clamping force design, applies stable radial constraint to the U-shaped chip removal groove of the twist drill 25 during drilling to further enhance rigidity. During machining intervals, it smoothly and thoroughly removes entangled chips through a combination of axial movement and rotation combined with the directional injection of high-pressure cutting fluid. This systematic solution, which integrates active vibration suppression, efficient chip removal, and cooling and lubrication, not only significantly improves the consistency of hole machining quality and tool life, but also achieves automated continuous production through the seamless connection between the chip removal process and the machining cycle. This fully demonstrates the engineering practical value and necessity for promotion of this design in solving key technical problems in the industry.

[0050] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A CNC drilling machine for machining mold components, comprising a base and a support mounted thereon; characterized in that: The support base is equipped with a drilling mechanism; The drilling mechanism includes a fixed base with a concave structure that is fixedly mounted on a support base. Two symmetrical slide blocks are slidably mounted on the fixed base. A cantilever is fixedly mounted on the right end of each slide block. A rotary spindle is fixedly mounted on the cantilever. A chuck is fixedly mounted on the output section of the rotary spindle. A twist drill is mounted on the chuck. A drive unit is provided on the fixed base. The chuck is equipped with a chip removal part, which includes a fixed cylinder fixedly installed on the chuck. A ring plate is movably sleeved on the fixed cylinder. Fixed rings are fixedly installed on the opposite ends of the two ring plates through a support column. A rotating ring is coaxially rotatably installed on the fixed ring. A pair of push rods can be detachably installed on the opposite ends of the two rotating rings. Two slots are opened on the fixed ring, and a spray pipe is rotatably installed in the slot. An adjustment part is provided on the fixed ring, a push-pull part is provided on the cantilever, and a linkage part is provided on the rotating ring. The drive unit drives two twist drills to drill holes in the ring die simultaneously, while the reverse cutting force forms a closed loop of force within the rigid frame composed of the fixed seat and the slide. During drilling, the push rod continuously squeezes the inner wall of the U-shaped chip removal groove of the twist drill. During chip removal, it moves along the U-shaped chip removal groove and cooperates with the nozzle to spray cutting fluid to remove chips.

2. The CNC drilling machine for machining mold components according to claim 1, characterized in that: The drive unit includes a pair of limiting posts fixedly installed between two transverse sections of the fixed base. The limiting posts slide through the two slides. A bidirectional screw is provided between the two limiting posts. The two ends of the bidirectional screw rotate through the two transverse sections of the fixed base respectively. The two slides are threadedly connected to the two threaded sections of the bidirectional screw respectively. A servo motor with an output shaft fixedly connected to the bidirectional screw is fixedly installed at the rear end of the rear transverse section of the fixed base.

3. The CNC drilling machine for machining mold components according to claim 1, characterized in that: The linkage includes a slide tube. The slide tube is uniformly fixedly installed around the end of the rotating ring near the fixed cylinder. A slide column is slidably installed inside the slide tube. A compression spring is fixedly installed between the end of the slide column near the corresponding rotating ring and the rotating ring. A second ball is rolledly installed at the end of the slide column away from the corresponding rotating ring. A limiting hole corresponding to the slide column is opened at the end of the fixed cylinder near the corresponding rotating ring.

4. The CNC drilling machine for machining mold components according to claim 1, characterized in that: The adjusting part includes a sleeve, and a section of the nozzle near the corresponding ring plate is slidably fitted with the sleeve. A connecting plate is rotatably installed on the sleeve. A fixing plate located on the left side of the fixing cylinder is fixedly installed between the ring plate and the fixing ring. A bidirectional cylinder is fixedly installed at the left end of the fixing plate. The two telescopic sections of the bidirectional cylinder are respectively fixedly connected to the two corresponding connecting plates.

5. A CNC drilling machine for machining mold components according to claim 1, characterized in that: The push-pull part includes a push-pull plate fixedly installed on the ring plate, and a telescopic cylinder fixedly installed at the upper end of the cantilever. The telescopic section of the telescopic cylinder is fixedly connected to the corresponding push-pull plate.

6. A CNC drilling machine for machining mold components according to claim 1, characterized in that: A reinforcing rod is installed at an angle between the lower end of the cantilever and the right end of the corresponding slide block, and the reinforcing rod, cantilever, and slide block form a stable triangular structure.

7. A CNC drilling machine for machining mold components according to claim 1, characterized in that: A connecting seat is fixedly installed at one end of the push rod near the corresponding rotating ring, and the connecting seat is fixedly connected to the rotating ring by bolts.

8. A CNC drilling machine for machining mold components according to claim 1, characterized in that: The push rod is fitted with a No. 1 ball bearing at the end furthest from the rotating ring.

9. A CNC drilling machine for machining mold components according to claim 1, characterized in that: Multiple reinforcing ribs are fixedly installed between the lower end of the fixed base and the right end of the support base.

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