Numerical control drilling machine for mould assembly machining

Abstract

The present application relates to the technical field of mold processing, and particularly relates to a numerical control drilling machine for mold assembly processing; the numerical control drilling machine comprises a base and a supporting seat mounted on the base; a drilling mechanism is arranged on the supporting seat; the present application drives double twist drills in a rigid frame formed by a fixing seat and a sliding seat to realize synchronous opposite drilling, breaks through the efficiency bottleneck of single main shaft sequential operation through a parallel processing mode, effectively suppresses processing vibration by forming a force closed loop through reverse cutting force, and simultaneously realizes automatic removal and cooling and lubrication of cuttings through extrusion support and removal of cuttings of a push rod in a U-shaped chip removal groove of the twist drill and directional injection of a spray pipe, thereby solving the technical problems of low efficiency, vibration deflection and cutting entanglement in ring mold drilling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold processing, in particular to a numerical control drilling machine for mold assembly processing. BACKGROUND

[0002] The ring die is a multi-hole ring die, which functions to force the powdery raw material to pass through the die hole under the extrusion of the pressure roller, forming high-density cylindrical particles, and is applied to the fields of biomass fuel pellet machines, large-pore feed ring dies, and organic fertilizer pelletizing machines, etc. The diameter of the working hole of the ring die usually falls within the range of 10mm to 20mm. The existing technology generally adopts a single-spindle, single-side up-and-down moving feeding mode for drilling operation. In such a processing mode, twist drills are widely used due to their strong versatility and low cost. In particular, when processing larger holes, it is a common practice in the industry to select a twist drill with a larger diameter. It should be noted that in the existing technology, a twist drill with a larger diameter is usually designed with not less than two U-shaped chip flutes. This multi-flute structure is a standard design for large-diameter twist drills, and its main purpose is to improve chip removal performance and enhance drill body structural strength. The symmetrical distribution of multiple U-shaped chip flutes enables the twist drill to have 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 the processing process will wrap around the twist drill, not only hindering the effective delivery of cutting fluid and chip removal, but also increasing the drilling torque and causing vibration, which directly affects the drilling precision and surface quality. Third, the existing technology lacks an automatic chip removal means synchronized with the processing process, which requires the equipment to be frequently stopped for manual cleaning. This not only increases the labor intensity and safety hazards of the operators, but also seriously disrupts the continuity of the production process, making it difficult to achieve automated assembly line operation, thereby restricting the improvement of ring die manufacturing level in terms of efficiency, quality, and automation level.

[0004] Therefore, the efficiency bottleneck of single-spindle sequential drilling, the precision decline caused by chip winding, and the interruption of automated production are technical problems that need to be solved by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a numerical control drilling machine for mold assembly processing to solve the above-mentioned technical problems.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: a numerical control drilling machine for mold assembly processing, comprising a base and a support seat mounted thereon; a drilling mechanism is arranged on the support seat.

[0007] The drilling mechanism comprises a fixed seat fixedly installed on the support base and having a concave structure, two front and rear symmetrical sliding seats slidably installed on the fixed seat, a cantilever fixedly installed at the right end of each sliding seat, a corner spindle fixedly installed on the cantilever, a chuck fixedly installed on the output section of the corner spindle, a twist drill installed on the chuck, and a driving part provided on the fixed seat.

[0008] The chuck is provided with a chip removal part, which comprises a fixed cylinder fixedly installed on the chuck, a ring plate movably sleeved on the fixed cylinder, a fixed ring fixedly installed on the opposite end of each ring plate through a support column, an installation ring coaxially rotatable on the fixed ring, a pair of push rods detachably installed on the opposite end of each installation ring, two notches provided on the fixed ring, a spray pipe rotatably installed in each notch, an adjusting part provided on the fixed ring, a push-pull part provided on the cantilever, and a linkage part provided on the installation ring.

[0009] The driving part drives the two twist drills to simultaneously drill the ring mold, and the reverse cutting force forms a force closed loop in the rigid frame formed by the fixed seat and the sliding seat. The push rod continuously extrudes the inner wall of the U-shaped chip removal groove of the twist drill during drilling, and moves along the U-shaped chip removal groove to cooperate with the spray pipe to spray cutting fluid to remove the chips.

[0010] As a preferred scheme, the driving part comprises a pair of limiting columns fixedly installed between the two transverse sections of the fixed seat, the limiting columns slidably penetrate the two sliding seats, a bidirectional screw rod is arranged between the two limiting columns, the two ends of the bidirectional screw rod are rotatably penetrated through the two transverse sections of the fixed seat, the two sliding seats are threadedly connected with the two threaded sections of the bidirectional screw rod, and a servo motor fixedly connected with the bidirectional screw rod is fixedly installed at the rear end of the rear transverse section of the fixed seat.

[0011] As a preferred scheme, the linkage part comprises a sliding pipe, the end of the installation ring close to the fixed cylinder is uniformly fixedly installed with a sliding pipe along the circumference thereof, a sliding column is slidably installed in the sliding pipe, a compression spring is fixedly installed between the end of the sliding column close to the corresponding installation ring and the corresponding installation ring, a second rolling ball is rollingly installed at the end of the sliding column away from the corresponding installation ring, and a limiting hole corresponding to the sliding column is formed at the end of the fixed cylinder close to the corresponding installation ring.

[0012] As a preferred scheme, the adjusting part comprises a sleeve, the sleeve is slidably sleeved on the section of the spray pipe close to the corresponding ring plate, a connecting plate is rotatably installed on the sleeve, a fixed plate is fixedly installed between the ring plate and the fixed ring and located on the left side of the fixed cylinder, a bidirectional air cylinder is fixedly installed at the left end of the fixed plate, and the two telescopic sections of the bidirectional air cylinder are fixedly connected with the corresponding two connecting plates.

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

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

[0015] As a preferred scheme, a connecting seat is fixedly arranged at the end of the push rod close to the corresponding rotating ring, and the connecting seat is fixedly connected with the rotating ring through bolts.

[0016] As a preferred scheme, a first rolling ball is rollingly arranged at the end of the push rod away from the rotating ring.

[0017] As a preferred scheme, a plurality of reinforcing ribs are fixedly arranged between the lower end of the fixed seat and the right end of the supporting seat.

[0018] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects: first, the driving part drives the two twist drills to synchronously and oppositely drill in the rigid frame formed by the fixed seat and the slide block, not only breaks through the efficiency bottleneck of the sequential operation of the single main shaft through the parallel processing mode, but also effectively suppresses the machining vibration by forming a force closed loop with the generated reverse cutting force; at the same time, the chip removal part removes the chips by extruding and supporting the push rod in the U-shaped chip removal groove of the twist drill, and cooperates with the directional injection of the spray pipe to realize the automatic removal and cooling and lubrication of the chips, thereby solving the technical problems of low efficiency, vibration and chip winding in the ring mold drilling.

[0019] Second, the driving part drives the two slide blocks to synchronously and oppositely move on the fixed seat, so that the two twist drills can simultaneously drill the ring mold, and the parallel processing mode based on the rigid frame significantly improves the drilling efficiency; at the same time, the reverse cutting forces generated by the two twist drills form a force closed loop in the rigid frame, so that the net external force acting on the machine tool system tends to be balanced, and the vibration phenomenon in the drilling process is essentially eliminated, thereby ensuring the hole forming accuracy.

[0020] Third, the push rod of the chip removal part continuously extrudes the inner wall of the U-shaped chip removal groove of the twist drill during drilling to enhance the rigidity of the drill bit, and the push rod is moved along the U-shaped chip removal groove by the push-pull part in the machining gap, and the spray pipe is driven by the adjusting part to spray the cutting fluid to cooperate with the chip removal; the synergistic effect of mechanical chip removal and hydraulic flushing can effectively remove the winding chips and keep the cutting fluid passage unobstructed, thereby avoiding the interruption of machining caused by chip accumulation and ensuring the continuity of automatic production.

[0021] Additional aspects and advantages of the application will be better understood from the following descriptions. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description only represent the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on the provided drawings.

[0023] Figure 1 It is a schematic view of the three-dimensional structure of the present application.

[0024] Figure 2 It is a schematic view of the partial structure of the present application when the ring die is processed.

[0025] Figure 3 It is a schematic view of the structure of the driving part of the present application.

[0026] Figure 4 It is a schematic view of the structure of the linkage part of the present application.

[0027] Figure 5 It is a schematic view of the structure of the push-pull part of the present application.

[0028] Figure 6 It is a schematic view of the structure among the push rod, the spray pipe and the drill bit when the chips are cleaned.

[0029] The drawings are as follows: 10, base; 11, support seat; 2, drilling mechanism; 20, fixed seat; 200, reinforcing rib; 21, sliding seat; 22, cantilever; 220, reinforcing rod; 23, corner main shaft; 24, chuck; 25, twist drill; 3, chip cleaning part; 30, fixed cylinder; 31, ring plate; 32, fixed ring; 33, rotating ring; 34, push rod; 340, connecting seat; 35, spray pipe; 4, driving part; 40, limiting column; 41, bidirectional screw; 42, servo motor; 5, linkage part; 50, sliding pipe; 51, sliding column; 52, compression spring; 6, adjusting part; 60, sleeve; 61, connecting plate; 62, bidirectional air cylinder; 7, push-pull part; 70, push-pull plate; 71, telescopic air cylinder. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] As Figure 1As shown in the figure, a mold assembly machining numerical control drilling machine, including base 10 and installed on the support seat 11; support seat 11 is provided with drilling mechanism 2.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , drilling mechanism 2 includes fixedly installed on the right end of the support seat 11 and the concave structure of the fixed seat 20, the two transverse sections of the fixed seat 20 are slidably installed with two front and rear symmetrical sliding seats 21, the right end of the sliding seat 21 is fixedly installed with a cantilever 22, the right end of the cantilever 22 is fixedly installed with a corner spindle 23, the output section of the corner spindle 23 is fixedly installed with a chuck 24, the chuck 24 is provided with a twist drill 25, and the fixed seat 20 is provided with a driving part 4.

[0033] As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , the chuck 24 is provided with a chip removal part 3, the chip removal part 3 includes a fixed cylinder 30 fixedly installed on the chuck 24, the fixed cylinder 30 is coaxially movably sleeved with a ring plate 31, the opposite ends of the two ring plates 31 are fixedly installed with a fixed ring 32 through a support column, the middle part of the fixed ring 32 is coaxially rotatably installed with a rotating ring 33, the fixed ring 32 and the rotating ring 33 are coaxially rotatably connected through a tapered roller bearing, the bearing structure can simultaneously bear radial load and axial load, effectively share the combined force generated by the push rod 34 during work, not only ensure the stability and accuracy of the rotating process of the rotating ring 33, but also fundamentally avoid the wear and gap increase of the connecting part due to long-term alternating load from the structure design, so as to ensure the connection stiffness and working stability of the whole chip removal part 3 under long-term use, the opposite ends of the two rotating rings 33 are detachably installed with a pair of push rods 34, 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 is provided with two upper and lower symmetrical notches, the notches are rotatably installed with a nozzle 35, the fixed ring 32 is provided with an adjusting 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] As shown in 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 the two holes are machined, the driving part 4 drives the two twist drills 25 to move towards each other to separate from the ring mold and move to the original position for resetting. Then the external clamp drives the fixed ring mold to move horizontally to the left for a certain distance to process the next hole. After a row of holes are machined, the twist drill 25 is reset to the original position, and the external clamp drives the ring mold to rotate by a certain angle to process the next row of holes. During the rotation of the ring mold, the adjusting part 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 part 7 pushes the corresponding ring plate 31 to move towards the end of the corresponding twist drill 25. The ring plate 31 moves the fixed ring 32 and the rotating ring 33 synchronously through the support. The rotating ring 33 drives the push rod 34 to slide in the corresponding U-shaped chip removal groove of the twist drill 25 and rotate correspondingly. During the movement of the push rod 34, the chips wound around the corresponding twist drill 25 are pushed away from the twist drill 25. The cutting fluid sprayed by the nozzle 35 helps to impact the chips to separate from the twist drill 25, and also plays a lubricating role between the push rod 34 and the twist drill 25, so as to reduce the friction force suffered by the push rod 34 during movement, thereby improving the smoothness of the movement of the push rod 34 and prolonging the service life of the push rod 34. Therefore, the above-mentioned method can timely remove the chips covering the cutting area of the twist drill 25, create a good flow channel for the cutting fluid, and ensure that the high-pressure cooling liquid can be directly sprayed to the hot spot area of the twist drill 25, thereby greatly improving the cooling efficiency.

[0037] In addition, the necessity of selecting a double-U-shaped twist drill 25 is that the total cutting force generated during drilling is more evenly dispersed, and the wide chips are divided into several narrower ones. This design makes the twist drill 25 less likely to deviate during cutting, can drill a deeper distance at one time without frequent tool withdrawal and chip removal, and can effectively reduce the risk of jamming or breaking of the twist drill 25 due to chip blockage, thereby more stably ensuring the consistent quality of each hole and improving the overall machining efficiency when machining a large number of dense holes on the ring mold.

[0038] As shown in Figure 1 , Figure 2 and Figure 3 , the driving part 4 includes a pair of limiting columns 40 fixedly installed between the two transverse segments of the fixed seat 20. The limiting columns 40 slide through the two sliding seats 21. A bidirectional screw rod 41 is arranged between the two limiting columns 40. The two ends of the bidirectional screw rod 41 are rotatably penetrated through the two transverse segments of the fixed seat 20. The two sliding seats 21 are threadedly connected with the two threaded segments of the bidirectional screw rod 41. The rear end of the rear transverse segment of the fixed seat 20 is fixedly installed with a servo motor 42, the output shaft of which is fixedly connected with the bidirectional screw rod 41.

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

[0040] As shown in Figure 1 and Figure 2 , the lower end of the fixed seat 20 and the right end of the support seat 11 are fixedly installed with a plurality of reinforcing ribs 200, which greatly enhances the connection rigidity and structural stability between the fixed seat 20 and the support seat 11, and ensures that the installation foundation of the entire drilling mechanism 2 will not be deformed or vibrated when bearing the internal stress caused by "force closed loop", providing a solid foundation for high-precision drilling.

[0041] As shown in Figure 4 , Figure 5 and Figure 6 , the linkage part 5 includes a slide pipe 50, and the slide pipe 50 is uniformly and fixedly installed around one end of the rotating ring 33 close to the fixed cylinder 30, and the slide pipe 50 is slidably installed with a slide column 51, and the slide column 51 is fixedly installed with a compression spring 52 between one end close to the corresponding rotating ring 33 and the rotating ring 33, and the other end of the slide column 51 away from the corresponding rotating ring 33 is rollingly installed with a second ball, and the fixed cylinder 30 is provided with a limiting hole corresponding to the slide column 51 at one end close to the corresponding rotating ring 33.

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

[0043] As shown in Figures 1 to 6As shown, in specific work, the servo motor 42 drives the bidirectional screw 41 to rotate, and the bidirectional screw 41 drives the two sliding seats 21 to move away from each other, thereby driving the two twist drills 25 to process two holes at the same time, so as to improve the processing efficiency and the stability of the drilling. After processing a row of holes, the servo motor 42 reverses to drive the bidirectional screw 41 to reverse, and the bidirectional screw 41 drives the two sliding seats 21 to move towards each other and reset. Then the telescopic cylinder 71 drives the corresponding ring plate 31 to move away from the corresponding corner main shaft 23 through the push-pull plate 70, and the ring plate 31 drives the fixed ring 32 and the rotating ring 33 to move synchronously through the support. The movement of the rotating ring 33 drives the push rod 34 to slide in the U-shaped chip removal groove of the twist drill 25. Since the push rod 34 is in contact with 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 also drive the chuck 24 and the fixed cylinder 30 to rotate. Since the slide column 51 is inserted into the corresponding limiting hole at this time, the rotating ring 33 also rotates, so that the rotating ring 33 rotates away from the corresponding corner main shaft 23, until the slide column 51 is separated from the limiting hole. Then, with the movement of the rotating ring 33, the push rod 34 pushes the cuttings wound on the twist drill 25 out of the twist drill 25.

[0044] Then the telescopic cylinder 71 drives the corresponding ring plate 31 to move close to the corresponding corner main shaft 23 through the corresponding push-pull plate 70. The slide column 51 will first contact the fixed cylinder 30 through the second ball, and the slide column 51 cannot further approach the corner main shaft 23 and remains stationary. The rotating ring 33 continues to move and compresses the compression spring 52. Since the push rod 34 remains in the U-shaped chip removal groove of the twist drill 25, the rotating ring 33 and the fixed cylinder 30 will rotate. The slide column 51 rolls and rubs with the fixed cylinder 30 through the second ball to reduce the friction force and extend the service life of the slide column 51 and the fixed cylinder 30. Then, when the slide column 51 rotates to the same axis as the corresponding limiting hole, the slide column 51 will move and insert into the corresponding limiting 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 next area of the ring mold can be processed.

[0045] As shown in Figure 3 and Figure 5 The adjusting part 6 includes a sleeve 60. The nozzle 35 is sleeved with the sleeve 60 near the corresponding ring plate 31. The connecting plate 61 is rotatably installed on the sleeve 60. The fixed plate is fixedly installed between the ring plate 31 and the fixed ring 32 on the left side of the fixed cylinder 30. The double-action cylinder 62 is fixedly installed on the left end of the fixed plate. The two telescopic sections of the double-action cylinder 62 are fixedly connected with the corresponding two connecting plates 61.

[0046] As shown in Figure 5 and Figure 6As shown, the push rod 34 is fixedly installed with a connecting seat 340 near one end of the corresponding rotating ring 33, and the connecting seat 340 is fixedly connected with the rotating ring 33 through a bolt. The detachable structure not only ensures the force transmission reliability of the push rod 34 during the chip removal process, but also facilitates the separate disassembly and replacement of the push rod 34 after wear, thereby significantly reducing the maintenance cost and time. At the same time, the bolt connection method allows the initial extrusion force of the push rod 34 on the flute wall of the twist drill 25 to be fine-tuned by adjusting the tightening torque, providing a precise adjustment means for achieving the best support effect and avoiding overload damage.

[0047] As shown in Figure 5 and Figure 6 , the push rod 34 is rollingly installed with a No. 1 ball at the end 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 flute of the twist drill 25, sliding friction is converted into rolling friction, not only smoothly pushing down the chips, but more importantly, significantly reducing the frictional resistance and wear on the drill flute, effectively protecting the twist drill 25 from damage and prolonging the service life of the push rod 34 itself.

[0048] As shown in Figure 3 , Figure 5 and Figure 6 , in specific work, the bidirectional cylinder 62 pushes the corresponding two sleeves 60 away from each other through the corresponding connecting plates 61, the sleeves 60 pull the corresponding nozzles 35 to rotate, and the nozzles 35 slide on the corresponding sleeves 60. With the movement of the sleeves 60, the nozzles 35 will be rotated to the state that the axis points to the end of the push rod 34. At this time, the high-pressure cutting fluid sprayed by the nozzles 35 forms three key roles: first, directly impacting the root of the wound chip, weakening its winding strength; second, forming a lubricating film between the push rod 34 and the flute wall of the twist drill 25, and through the rolling cooperation of the No. 1 ball, the sliding friction is converted into rolling friction, significantly reducing the movement resistance; finally, washing away the separated chips. The cooperation of this directional injection and the mechanical action of the push rod 34 not only ensures that the chips are completely stripped, but also ensures that the push rod 34 works stably in a low-wear state.

[0049] Moreover, the technical scheme provided by the present application has sufficient rationality and indispensable practicability, and is designed based on the core problems of poor chip removal and low efficiency in ring mold drilling; the diametrically opposite drilling layout of the double twist drills 25 is adopted, and the reverse cutting forces generated thereby form a force closed loop in the rigid frame composed of the fixed seat 20, the sliding seat 21 and the bidirectional screw rod 41, which eliminates the machining vibration and tool relief phenomenon from the mechanical principle, provides a decisive guarantee for high-precision drilling, and changes the traditional single-axis sequential machining mode by the parallel operation mode of the double twist drills 25, so that the drilling efficiency is substantially multiplied; the push rod 34 integrated on the chuck 24 applies stable radial constraint to the U-shaped chip groove of the twist drill 25 to further enhance the rigidity during drilling, and through the combined motion of axial movement and rotation and the directional injection of high-pressure cutting fluid in the machining gap, the wound cutting chips are smoothly and completely removed. This systematic solution integrating active vibration suppression, efficient chip removal and cooling and lubrication not only significantly improves the consistency of hole machining quality and the service life of the tool, but also realizes automatic continuous production through the seamless connection of the chip removal process and the machining cycle, fully proving the engineering practical value and promotion necessity of the design in solving the key technical problems in the industry.

[0050] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0051] In addition, the terms "first", "second", "No. 1", "No. 2" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "No. 1", "No. 2" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0052] In the description of the present application, it also needs to be explained that, unless explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited by the protection scope of the present application, so that equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

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. The push rod continuously squeezes the inner wall of the U-shaped chip removal groove of the twist drill during drilling, and moves along the U-shaped chip removal groove during chip removal and cooperates with the nozzle to spray cutting fluid to remove chips. 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. The linkage includes a slide tube. A slide tube is evenly 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. 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 two-way cylinder is fixedly installed at the left end of the fixing plate. The two telescopic sections of the two-way cylinder are respectively fixedly connected to the two corresponding connecting plates. 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.

2. The 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.

3. The 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.

4. The 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.

5. 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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