Process for machining an inlay link body

Abstract

The application discloses a machining process of an inner-linking body, which comprises the following steps: S1, a blank is primarily processed and formed, and an installation groove is formed on a main body part; S2, the blank is clamped and fixed on a positioning tool of a numerical control machine tool; S3, a containing groove is formed on a side wing part of the numerical control machine tool; S4, a drilling module of the numerical control machine tool drives a pre-processing drill bit to drill a first water inlet hole which penetrates a groove wall of the containing groove; S5, the drilling module of the numerical control machine tool drives a three-point drill bit to drill a second water inlet hole which penetrates a groove wall of the installation groove, and a burr is formed at the penetration of the second water inlet hole and the groove wall of the installation groove, and the burr is mainly in a sheet shape; S6, a milling module of the numerical control machine tool drives a reaming milling cutter to mill and enlarge the aperture of the second water inlet hole, and the sheet-shaped burr is milled and reduced to a wire shape; and S7, the milling module of the numerical control machine tool drives a chamfer milling cutter to mill away the wire-shaped burr along a curved path of the penetration of the second water inlet hole and the groove wall of the installation groove and form a chamfer.

Description

Technical Field

[0001] This invention relates to the field of drilling and milling technology, specifically to the machining process of a built-in connecting body. Background Technology

[0002] The built-in connector is a water circuit control element used in multi-functional systems in the bathroom and plumbing industry. It serves not only as a hub for connecting and merging hot and cold water pipes, but also as an integrated chassis supporting the upper valve core module. (See attached image) Figure 1 The diagram shows a built-in connecting body provided by the inventor, which includes a main body 110 in the middle and side wings 120 disposed on the left and right sides of the main body 110. The top of the main body 110 is provided with a mounting groove 111 for installing a valve core, and the top of the side wings 120 on both sides is provided with a receiving groove 121 for installing a check valve. The mounting groove 111 and the receiving groove 121 are parallel in axis. The side wings 120 facing away from the main body 110 are provided with a main water inlet 130 laterally, and the front and rear ends of the main body 110 are provided with a secondary water inlet 140 and a water outlet 150 longitudinally, respectively. The axes of the main water inlet 130, the secondary water inlet 140 and the water outlet 150 are all perpendicular to the axis of the mounting groove 111. The symmetrically arranged main water inlet 130, secondary water inlet 140 and water outlet 150 are used to connect the pipes on the four sides.

[0003] As attached Figure 2 As shown, during the processing of the built-in connecting body, after the blank part 1 is initially processed into the main body 110, side wing 120, main water inlet 130, auxiliary water inlet 140 and water outlet 150, it is necessary to first open the mounting groove 111 in the main body 110, then open the receiving groove 121 on the side wing 120 on both sides, and drill the water inlet channel connecting the mounting groove 111 on the main water inlet 130 on both sides. That is, the drill bit is used to drill from the outer end of the main water inlet 130 along its axial direction until the groove wall of the mounting groove 111 is completely drilled through. The drill bit drills the first water inlet hole 131 through the groove wall of the receiving groove 121 in the main water inlet 130, and then drills from the other side of the groove wall of the receiving groove 121 to drill the second water inlet hole 112 through the groove wall of the mounting groove 111, so that the first water inlet hole 131, the receiving groove 121 and the second water inlet hole 112 constitute the water inlet channel connecting the mounting groove 111.

[0004] However, during the drilling of water inlet channels in the main water inlet sections 130 on both sides, the drilling depth required to drill through the second water inlet hole 112 in one go is relatively large, and the diameters of the first water inlet hole 131 and the second water inlet hole 112 are relatively small, meaning the diameter-to-depth ratio of the drilling is large. This places a heavy load on the cutting tool, making it impossible to guarantee the accuracy of the hole diameter drilled in one go. Furthermore, burrs are easily formed on the wall of the mounting groove 111 and at the penetration point of the second water inlet hole 112, affecting assembly and use. Therefore, a deburring process is required. Traditionally, deburring is done manually. However, due to the good ductility of the blank 1, the burrs produced are large and difficult to remove. Moreover, since the mounting groove 111 is a conical groove with a conical wall, burrs need to be removed along a curved path, further increasing the difficulty of deburring. This results in manual deburring not only incurring high labor costs but also low processing efficiency. Furthermore, the mounting groove 111 used to connect the valve core has high requirements for the sealing of the groove wall, and the effect of manual deburring depends entirely on the worker's experience. Improper handling can easily scratch the groove wall, leading to product scrap.

[0005] Therefore, how to provide a processing technology for an internally connected body that is easy to remove burrs while ensuring processing accuracy has become the main problem that needs to be solved. Summary of the Invention

[0006] In view of the aforementioned defects or deficiencies in the existing technology, it is desirable to provide a machining process for the built-in connecting body, which adopts a segmented drilling method using pre-machined drill bits and tri-point drill bits. The machining depth and tool load at each step are reasonably controlled, effectively avoiding tool deviation; and a reamer is used to enlarge the second water inlet hole, thereby accurately correcting the hole diameter and ensuring machining accuracy; furthermore, using a tri-point drill bit with a sharp tip and low cutting force to drill through the second water inlet hole not only ensures the accuracy of the hole diameter, but also results in smaller burrs formed after the tri-point drill bit penetrates the mounting groove wall; not only... In this way, the thickness of the burrs is gradually reduced during the drilling and milling processes, and the burrs are transformed into easily cleanable filaments. Then, the filamentous burrs are precisely removed in one go during the chamfering process. This achieves active management and controllable transformation of the burr morphology. Not only is the burr removal effect good, but the burrs are also naturally removed during the normal process of drilling the water outlet channel, resulting in high processing efficiency. Furthermore, all processes are completed on CNC machine tools through automatic tool switching and automatic control of the processing program, which not only reduces labor costs but also ensures the accuracy and efficiency of processing, thus guaranteeing the yield rate of the products.

[0007] The beneficial effects of this invention are achieved as follows:

[0008] This application provides a processing technology for a built-in link body, including the following steps:

[0009] S1. The blank part is initially processed and shaped, and an installation groove is opened on the main body;

[0010] S2. A positioning fixture for clamping and fixing the blank on a CNC machine tool;

[0011] S3. A receiving groove is opened on the side wing of the CNC machine tool;

[0012] S4. The drilling module on the CNC machine tool drives the pre-processed drill bit to drill axially from the outer end of the main water inlet and drill to form the first water inlet hole that penetrates the wall of the receiving tank.

[0013] S5. The drilling module on the CNC machine tool drives the three-pointed drill bit to extend axially into the first water inlet hole from the outer end of the main water inlet until the drill tip of the three-pointed drill bit contacts the groove wall on the side of the receiving groove facing away from the first water inlet hole. The three-pointed drill bit further drills into the groove wall of the receiving groove and drills to form a second water inlet hole that penetrates the groove wall of the mounting groove. A burr is formed at the penetration point between the second water inlet hole and the groove wall of the mounting groove. The burr is mainly flaky.

[0014] S6. The milling module on the CNC machine tool drives the reaming cutter to extend axially into the second water inlet from the outer end of the main water inlet. The reaming cutter moves circumferentially along the second water inlet to mill and enlarge the diameter of the second water inlet, and mills the sheet-like burrs at the penetration point between the second water inlet and the mounting groove wall into filaments.

[0015] S7. The milling module on the CNC machine tool drives the chamfering cutter to extend into the mounting groove along the axial direction. The chamfering cutter removes the filamentous burrs and forms a chamfer along the curved path through the second water inlet hole and the wall of the mounting groove.

[0016] Furthermore, the central cutting edge of the three-pointed drill bit has an included angle of 80-90°, and the secondary cutting edge has an included angle of 100-110°. At the moment the three-pointed drill bit penetrates the wall of the mounting slot, the sharp central cutting edge can break through the material with a smaller axial thrust and concentrated cutting force, resulting in smaller burrs. Moreover, the 100-110° included angle of the secondary cutting edge ensures that the pressure exerted on the secondary cutting edge when breaking through the material is almost parallel to the axial direction of the second water inlet hole. This prevents the three-pointed drill bit from wobbling or deflecting, thus ensuring the accuracy of the diameter of the machined second water inlet hole.

[0017] Furthermore, the reamer is a helical flute double-flute reamer with a helix angle of 20-40°. The reamer not only has uniform cutting force but also high strength, resulting in a smooth machining process and achieving high-precision hole diameter and high-roundness hole shape. At the same time, the double-flute structure ensures sufficient chip removal space, improving the surface quality of the second water inlet hole wall.

[0018] Furthermore, the chamfering end mill is a four-flute ball end mill. The cutting part of the ball end mill is hemispherical, and its cutting edge always contacts the workpiece with the same effective radius, which can accurately replicate the preset chamfer profile; and the four-flute structure makes the cutting edge contact the workpiece surface more frequently, resulting in a smooth, uniform chamfer without burr residue, further improving machining accuracy, and ensuring the integrity and smoothness of the sealing surface of the mounting groove wall.

[0019] Furthermore, in step S4, the feed rate of the pre-machined drill bit when it initially enters the main water inlet is v1. When the drill tip of the pre-machined drill bit is about to penetrate the wall of the receiving groove, the feed rate of the pre-machined drill bit switches to v2 until it penetrates the wall of the receiving groove, where v2 is less than v1. Actively reducing the feed rate at the critical point where the drill bit breaks through the wall of the receiving groove allows the drill bit to break through the wall with a smaller feed amount, reducing the plastic deformation formed at the penetration point of the receiving groove wall and also reducing the impact force generated at the moment of wall breaking. This effectively protects the drill tip of the pre-machined drill bit and extends the tool life.

[0020] Furthermore, when the drill tip of the pre-processed drill bit is 2-4 mm away from the wall of the receiving groove, the feed rate switches to v2, and v2 is 40-50% of v1. This provides an appropriate buffer stroke, ensuring that the drill tip has fully entered a stable low-speed feed state when it breaks through the groove wall, achieving the best balance between processing efficiency and impact force control. The 40-50% difference in rate between v1 and 2v is the optimal parameter range that ensures effective suppression of the impact force when the drill tip breaks through the groove wall, while taking into account both processing efficiency and surface quality.

[0021] Furthermore, the diameter of the pre-machined drill bit is larger than that of the three-pointed drill bit. This ensures that the diameter of the first water inlet hole drilled by the pre-machined drill bit is larger than that of the three-pointed drill bit. The three-pointed drill bit will not rub against or interfere with the wall of the first water inlet hole, and can smoothly reach the wall of the receiving tank on the other side and be accurately centered.

[0022] Furthermore, the positioning fixture includes a substrate, with the left and right sides of the top of the substrate respectively configured as a preliminary processing station and a complete processing station. A first clamping structure is provided on the preliminary processing station, and a second clamping structure is provided on the complete processing station. A pair of first processing ports are vertically formed in the preliminary processing station, and a second processing port is vertically formed in the complete processing station.

[0023] In step S2, the positioning fixture clamps and fixes two sets of blanks on the left and right sides through the first clamping structure and the second clamping structure. The main water inlet on both sides of the blank clamped in the first clamping structure extends in the front and back direction, and the side wings on both sides are respectively aligned with the first processing port on the front and back sides. The mounting groove on the blank clamped in the second clamping structure is directly aligned with the second processing port.

[0024] In steps S3-S6, the CNC machine tool processes the blank at the preliminary machining station; in step S7, the CNC machine tool processes the blank at the final machining station. Two sets of blanks can be clamped at the two stations, and each station is responsible for different machining processes, thus enabling parallel processing of multiple workpieces and multiple processes, significantly improving processing efficiency. The precise matching of the first and second machining ports with the clamping posture of the blanks ensures that multiple machining processes can be successfully completed after a single clamping and positioning, improving efficiency and avoiding errors caused by repeated positioning.

[0025] Furthermore, the first clamping structure includes a first mounting platform fixedly connected to the top of the substrate and a first pressure plate bolted to the substrate. A first clearance opening is vertically formed on the first pressure plate. In step S1, a blank shank is formed at the bottom of the blank for the fixture to clamp the blank. In step S2, the blank shank at the bottom of the blank is exposed through the first clearance opening onto the first pressure plate. In step S3, the milling module on the CNC machine tool removes the blank shank at the bottom of the blank through the first clearance opening. By opening the first clearance opening on the first pressure plate, it is ensured that the blank shank will not interfere with the first pressure plate, and the clamping force is fully applied to the solid surface of the side wing, ensuring the stability and reliability of the clamping. Moreover, the milling module can directly contact the exposed blank shank through the first clearance opening, and the blank shank can be milled without removing the blank from the positioning fixture, reducing the number of processes, shortening the processing cycle, and ensuring the processing accuracy and consistency of the product.

[0026] Furthermore, the first clamping structure includes a pair of left and right first mounting platforms. The center of the first pressure plate is bolted to the base plate, and the left and right sides of the first pressure plate respectively press two blanks onto the first mounting platforms on both sides. A single first pressure plate presses two blanks simultaneously, resulting in high clamping efficiency. The CNC machine tool can process two blanks on the first clamping structure at once, thereby significantly improving processing efficiency.

[0027] Furthermore, the second clamping structure includes a second mounting platform fixedly connected to the top of the substrate and a second pressure plate bolted to the substrate. A second clearance opening is vertically formed on the second pressure plate. In step S2, the side wing is exposed through the second clearance opening onto the second pressure plate. In step S7, the milling module on the CNC machine tool mills the bottom surface of the side wing through the second clearance opening. The milling module of the CNC machine tool can directly contact the bottom surface of the side wing through the second clearance opening, allowing for precision milling of the side wing without removing the blank from the positioning fixture. This reduces the number of processes, shortens the processing cycle, and ensures the processing accuracy and consistency of the product.

[0028] Furthermore, the second clamping structure includes a pair of left and right second mounting platforms. The center of the second pressure plate is bolted to the base plate, and the left and right sides of the second pressure plate respectively press the two blanks onto the second mounting platforms on both sides. A single second pressure plate achieves synchronous clamping of the blanks on both sides, resulting in high clamping efficiency. The CNC machine tool can process the two blanks on the first clamping structure at one time, thereby significantly improving processing efficiency.

[0029] Furthermore, the secondary water inlet and water outlet on the blank clamped in the second clamping structure extend in the front-to-back direction; in step S7, the drilling module on the CNC machine tool drills a secondary water inlet hole through the wall of the mounting groove along the axial direction on the secondary water inlet, and drills a water outlet hole through the wall of the mounting groove along the axial direction on the water outlet. All processing is completed in one clamping at the fully processed station, with high positioning accuracy, ensuring processing accuracy and product yield.

[0030] The processing technology for the built-in link ontology provided in this application brings the following beneficial effects:

[0031] 1. First, a pre-machined drill bit is used to drill the first water inlet hole through the receiving groove on the main water inlet section. Then, a three-pointed drill bit is used to drill the second water inlet hole through the installation groove from the groove wall. This segmented drilling method, compared to drilling the first and second water inlets at once, allows for reasonable control of the machining depth and tool load at each step, effectively avoiding tool deviation. In step S, the diameter of the second water inlet hole drilled by the three-pointed drill bit is smaller than the preset size, leaving a milling allowance of 0.01-0.2mm. In step S, a reamer is used to enlarge the second water inlet hole, thereby accurately correcting the diameter of the second water inlet hole and ensuring machining accuracy.

[0032] 2. The second water inlet hole is drilled through using a three-pointed drill bit. Compared with a regular single-pointed drill bit, the three-pointed drill bit has a sharper tip and less cutting force, which not only ensures the accuracy of the hole diameter, but also results in smaller burrs after the three-pointed drill bit penetrates the wall of the installation groove, making it easier to remove burrs in the subsequent process.

[0033] 3. A three-pointed drill bit is used to create sheet-like burrs of appropriate size. Then, a reamer is used to enlarge the second water inlet hole and transform the sheet-like burrs into fine, loose filamentous burrs, significantly reducing the difficulty of burr removal. Finally, a chamfering milling cutter is used to follow the curved path through the second water inlet hole and the wall of the mounting groove to completely remove the loosened filamentous burrs and simultaneously complete the chamfering process. This processing concept completely breaks away from the traditional mindset of "passively cleaning burrs after they are generated" in the burr removal process. The thickness of the burrs is gradually reduced during the drilling and milling processes, and the burrs are transformed into easily cleanable filaments. Then, the filamentous burrs are precisely removed in one go during the chamfering process. This achieves active management and controllable transformation of burr morphology. Not only is the burr removal effect good, but the burrs are also naturally removed during the normal drilling process of the water outlet channel, resulting in high processing efficiency.

[0034] 4. In step S7, the CNC machine tool, through CAM programming, uses a milling module to control the chamfering cutter to move along the X, Y, and Z axes. This allows for precise milling and chamfering along the curved path through the mounting groove wall, eliminating the need for manual labor. This not only reduces labor costs but also avoids scratches to the groove wall caused by manual deburring, ensuring the integrity and smoothness of the sealing surface of the mounting groove wall, thus guaranteeing a high product yield. Furthermore, all processes are completed on the CNC machine tool through automatic tool switching and automatic program control. The blank parts do not need to be transferred between different machines, making the processing cycle of a single product controllable and highly consistent. This provides significant cost and efficiency advantages in large-scale mass production. Attached Figure Description

[0035] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0036] Figure 1 A three-dimensional structural diagram of the built-in link ontology provided in an embodiment of this application;

[0037] Figure 2 A schematic diagram illustrating the processing of the built-in link ontology provided in an embodiment of this application;

[0038] Figure 3 A schematic diagram of the machining process for drilling the first water inlet hole with a pre-machined drill bit provided in an embodiment of this application;

[0039] Figure 4 This is a front view of the pre-machined drill bit provided in an embodiment of this application.

[0040] Figure 5 A schematic diagram illustrating the machining process of drilling a second water inlet hole with a three-pointed drill bit, as provided in the embodiments of this application;

[0041] Figure 6A front view of the three-pointed drill bit provided in an embodiment of this application;

[0042] Figure 7 A schematic diagram illustrating the machining process of enlarging the second water inlet hole using a reamer provided in an embodiment of this application;

[0043] Figure 8 A front view of the reamer provided in this embodiment of the application;

[0044] Figure 9 A schematic diagram illustrating the machining process of milling a chamfer with a chamfering cutter according to an embodiment of this application;

[0045] Figure 10 A schematic diagram of the front structure of the chamfering end mill provided in the embodiments of this application;

[0046] Figure 11 A three-dimensional structural schematic diagram of the positioning tooling provided in the embodiments of this application;

[0047] Figure 12 A schematic diagram of the bottom structure of the positioning fixture provided in the embodiments of this application;

[0048] Figure 13 This is a schematic diagram of the connection structure between the first clamping structure and the substrate provided in an embodiment of this application;

[0049] Figure 14 This is a cross-sectional structural diagram of the first clamping structure provided in the embodiments of this application;

[0050] Figure 15 This is a schematic diagram of the connection structure between the first pressure plate and the rubber gasket provided in an embodiment of this application;

[0051] Figure 16 This is a schematic diagram of the connection structure between the second clamping structure and the substrate provided in an embodiment of this application;

[0052] Figure 17 This is a cross-sectional schematic diagram of the second clamping structure provided in the embodiments of this application;

[0053] Figure 18 This is a schematic diagram of the connection structure between the second pressure plate and the nylon gasket provided in an embodiment of this application.

[0054] The reference numerals in the attached drawings are as follows: 1-Blank part, 110-Main body, 111-Mounting groove, 112-Second water inlet, 120-Side wing, 121-Receiving groove, 130-Main water inlet, 131-First water inlet, 140-Secondary water inlet, 141-Secondary water inlet, 150-Water outlet, 151-Water outlet, 160-Blank shank, 2-Three-pointed drill bit, 3-Reamer, 4-Chamfering cutter, 5-Pre-machining drill bit, 6-Substrate, 6a-Preliminary machining station, 6b-Complete machining station, 610-First machining port, 620-Second machining port, 630-First machining port Second chip removal hole, 640-first limit pin, 650-second limit pin, 7-first mounting platform, 710-first alignment hole, 720-first chip removal hole, 8-first pressure plate, 810-first clearance opening, 820-pressing part, 821-connecting groove, 830-rubber gasket, 840-pin, 850-circlip, 860-first limit hole, 9-second mounting platform, 910-second alignment hole, 920-chip removal groove, 10-second pressure plate, 1010-second clearance opening, 1020-positioning groove, 1030-nylon gasket, 1040-second limit hole. Detailed Implementation

[0055] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0056] Please refer to the attached document. Figure 3-10 This application provides a processing technology for a built-in link body, including the following steps:

[0057] S1. The blank part 1 is initially processed and formed, and the mounting groove 111 is opened on the main body 110;

[0058] S2. Fix the blank 1 onto the positioning fixture on the CNC machine tool;

[0059] S3. A receiving groove 121 is opened on the side wing 120 of the CNC machine tool;

[0060] S4. The drilling module on the CNC machine tool drives the pre-processed drill bit 5 to drill axially from the outer end of the main water inlet 130 and drill the first water inlet hole 131 to form the wall of the through receiving groove 121.

[0061] S5. The drilling module on the CNC machine tool drives the three-pointed drill bit 2 to extend axially into the first water inlet hole 131 from the outer end of the main water inlet 130 until the drill tip of the three-pointed drill bit 2 contacts the groove wall of the receiving groove 121 on the side away from the first water inlet hole 131. The three-pointed drill bit 2 further drills into the groove wall of the receiving groove 121 and drills to form a second water inlet hole 112 that penetrates the groove wall of the mounting groove 111. A burr is formed at the penetration point between the second water inlet hole 112 and the groove wall of the mounting groove 111. The burr is mainly flaky.

[0062] S6. The milling module on the CNC machine tool drives the reaming cutter 3 to extend axially into the second water inlet hole 112 from the outer end of the main water inlet 130. The reaming cutter 3 moves circumferentially along the second water inlet hole 112 to mill and enlarge the diameter of the second water inlet hole 112, and mills the sheet-like burrs at the penetration point of the second water inlet hole 112 and the groove wall of the mounting groove 111 into filaments.

[0063] S7. The milling module on the CNC machine tool drives the chamfering cutter 4 to extend into the mounting groove 111 along the axial direction. Along the curved path through the second water inlet hole 112 and the groove wall of the mounting groove 111, the chamfering cutter 4 removes the filamentous burrs and forms a chamfer.

[0064] In this embodiment, a first water inlet hole 131, penetrating the receiving groove 121, is first drilled on the main water inlet section 130 using a pre-machined drill bit 5. Then, a second water inlet hole 112, penetrating the mounting groove 111, is further drilled from the groove wall of the receiving groove 121 using a three-point drill bit 2. This segmented drilling method, compared to drilling the first water inlet hole 131 and the second water inlet hole 112 at once, allows for reasonable control of the machining depth and tool load at each step, effectively avoiding tool deviation. In step S5, the diameter of the second water inlet hole 112 drilled by the three-point drill bit 2 is smaller than the preset size, leaving a milling allowance of 0.01-0.2 mm. In step S6, a reamer 3 is used to enlarge the second water inlet hole 112, thereby accurately correcting the diameter of the second water inlet hole 112 and ensuring machining accuracy.

[0065] Furthermore, the second water inlet hole 112 is drilled through using a three-pointed drill bit 2. Compared with a regular single-pointed drill bit, the three-pointed drill bit 2 has a sharper tip and lower cutting force, which not only ensures the accuracy of the hole diameter, but also results in smaller burrs after the three-pointed drill bit 2 penetrates the wall of the mounting groove 111, making it easier to remove burrs in the subsequent process.

[0066] Furthermore, a three-pointed drill bit 2 is used to create sheet-like burrs of appropriate size. Then, a reamer 3 is used to mill the second water inlet hole 112, transforming the sheet-like burrs into fine, loose filamentous burrs, significantly reducing the difficulty of burr removal. Finally, a chamfering milling cutter 4 is used to perform follow-up milling along the curved path through the second water inlet hole 112 and the groove wall of the mounting slot 111, completely removing the loosened filamentous burrs and simultaneously completing the chamfering process. This processing concept completely breaks away from the traditional mindset of "passively cleaning burrs after they are generated" in burr removal processes. The thickness of the burrs is gradually reduced during the drilling and milling processes, transforming them into easily cleanable filaments. In the chamfering process, the filamentous burrs are precisely removed in one go, achieving active management and controllable transformation of burr morphology. Not only is the burr removal effect good, but the burrs are also naturally removed along with the normal drilling process of the water outlet channel, resulting in high processing efficiency.

[0067] Furthermore, in step S7, the CNC machine tool, through CAM programming, allows the milling module to control the chamfering cutter 4 to move along the X, Y, and Z axes, thereby precisely milling and chamfering along the curved path through the wall of the mounting groove 111. This eliminates the need for manual labor, reducing labor costs and avoiding scratches to the groove wall caused by manual deburring. This ensures the integrity and smoothness of the sealing surface of the mounting groove 111, thus guaranteeing the product yield. All processes are completed on the CNC machine tool through automatic tool switching and automatic control of the machining program. The blank part 1 does not need to be transferred between different machines, making the processing cycle of a single product controllable and highly consistent. This provides significant cost and efficiency advantages in large-scale mass production.

[0068] CNC machine tools are conventional equipment in the prior art, and will not be described in detail in this embodiment.

[0069] Please refer to the attached document. Figure 5 and attached Figure 6 In some embodiments of this application, the included angle of the central cutting edge of the three-pointed drill bit 2 is 80-90°, and the included angle of the secondary cutting edge is 100-110°.

[0070] In this embodiment, at the instant the three-pointed drill bit 2 penetrates the wall of the mounting groove 111, the sharp central cutting edge can break through the material with a small axial thrust and concentrated cutting force. This results in less plastic deformation of the material at the penetration point between the second water inlet hole 112 and the wall of the mounting groove 111, thus producing smaller burrs and facilitating subsequent burr removal. Furthermore, during drilling, the 100-110° angle of the secondary cutting edge ensures that the pressure exerted by the secondary cutting edge when breaking through the material is almost parallel to the axial direction of the second water inlet hole 112. This means that the radial extrusion force experienced by the three-pointed drill bit 2 during drilling is small, making it less prone to shaking or deflection, thereby ensuring the accuracy of the diameter of the machined second water inlet hole 112.

[0071] Please refer to the attached document. Figure 7 and attached Figure 8 In some embodiments of this application, the reamer 3 is a spiral groove double-edged milling cutter with a helix angle of 20-40°.

[0072] In this embodiment, the 20-40° helix angle enables the reamer 3 to not only possess uniform cutting force but also high strength, resulting in a smooth machining process and effectively suppressing milling vibration. This leads to high-precision hole diameter and high-roundness hole shape. Simultaneously, the double-edged structure ensures ample chip removal space, allowing chips to flow smoothly and preventing chip blockage that could scratch the hole wall, thus improving the surface quality of the second water inlet hole 112.

[0073] Please refer to the attached document. Figure 9 and attached Figure 10 In some embodiments of this application, the chamfering cutter 4 is a four-flute ball end mill.

[0074] In this embodiment, the cutting part of the ball end mill is hemispherical, and its theoretical cutting point can be located at any position on the hemispherical surface. This allows the chamfering end mill 4 to perform curved following machining in any direction on the conical groove wall of the mounting groove 111. Its cutting edge always contacts the workpiece with the same effective radius, accurately replicating the preset chamfer contour. Furthermore, the four-flute structure results in a higher frequency of contact between the cutting edge and the workpiece surface, leading to lower and smoother surface roughness of the chamfered surface. Simultaneously, the four-flute ball end mill has a thicker core, resulting in stronger overall rigidity and cutting stability. When milling along a curved path, it is less prone to tool deflection or chatter marks due to radial force, ensuring the consistency of the chamfer width and depth throughout the curved path. The resulting chamfer is smooth, uniform, and burr-free, further improving machining accuracy and ensuring the integrity and smoothness of the sealing surface of the mounting groove 111.

[0075] Please refer to the attached document. Figure 3 In some embodiments of this application, in step S4, the feed rate of the pre-processed drill bit 5 when it initially drills into the main water inlet 130 is v1. When the drill tip of the pre-processed drill bit 5 is about to drill through the wall of the receiving groove 121, the feed rate of the pre-processed drill bit 5 is switched to v2 until it penetrates the wall of the receiving groove 121, where v2 is less than v1.

[0076] In this embodiment, when the tip of the pre-machined drill bit 5 is about to penetrate the wall of the receiving groove 121, the groove wall's resistance to deformation decreases significantly. If the feed rate remains high at this point, the drill bit will break through the groove wall with a huge axial impact force, causing severe plastic deformation and outward turning of the groove wall material. This may also cause the drill bit to deflect or even chip. Therefore, by actively reducing the feed rate at the critical point where the drill bit breaks through the groove wall 121, the drill bit breaks through the groove wall with a smaller feed amount. This reduces the plastic deformation formed at the penetration point of the receiving groove 121 wall and also reduces the impact force generated at the moment of wall breaking, effectively protecting the tip of the pre-machined drill bit 5 and extending the tool's service life.

[0077] Please refer to the attached document. Figure 3 In some embodiments of this application, when the tip of the pre-processed drill bit 5 is 2-4 mm away from the wall of the receiving groove 121, the feed rate is switched to v2, and v2 is 40-50% of v1.

[0078] In this embodiment, if the distance between the drill tip and the groove wall is too long during rate switching, the low-speed feed stroke of v2 will be too long, unnecessarily extending the overall processing time of step S4 and affecting production efficiency. If the distance between the drill tip and the groove wall is too short during rate switching, the deceleration buffer stroke will be insufficient, and the drill tip will break through the groove wall before fully entering the low-speed state, failing to fully achieve the effect of reducing impact force. A switching distance of 2-4mm provides an appropriate buffer stroke, ensuring that the drill tip has fully entered a stable low-speed feed state when breaking through the groove wall, achieving the best balance between processing efficiency and impact force control. The 40-50% rate ratio difference between v1 and v2 is the optimal parameter range to ensure effective suppression of the impact force when the drill tip breaks through the groove wall, while taking into account processing efficiency and surface quality.

[0079] Please refer to the attached document. Figure 3 and attached Figure 5 In some embodiments of this application, the diameter of the pre-processed drill bit 5 is larger than that of the triangular drill bit 2. This ensures that the diameter of the first water inlet hole 131 drilled by the pre-processed drill bit 5 is larger than that of the triangular drill bit 2. In other words, during the process of the triangular drill bit 2 passing through the first water inlet hole 131, the triangular drill bit 2 will not rub or interfere with the hole wall of the first water inlet hole 131, and can smoothly reach the groove wall on the other side of the receiving groove 121 and be accurately centered.

[0080] Preferably, the pre-processed drill bit 5 is a stepped drill bit. The first water inlet hole 131 has a small hole depth and needs to be processed into a stepped structure. The stepped drill bit not only has high rigidity, which can ensure the hole diameter accuracy of the first water inlet hole 131, but also can process a stepped hole shape in one go, ensuring processing efficiency.

[0081] Please refer to the attached document. Figure 11-18In some embodiments of this application, the positioning fixture includes a base plate 6. The left and right sides of the top of the base plate 6 are respectively configured as a preliminary processing station 6a and a complete processing station 6b. A first clamping structure is provided on the preliminary processing station 6a, and a second clamping structure is provided on the complete processing station 6b. A pair of first processing ports 610 are vertically formed in the preliminary processing station 6a, and a second processing port 620 is vertically formed in the complete processing station 6b.

[0082] In step S2, the positioning fixture clamps and fixes two sets of blanks 1 on the left and right sides through the first clamping structure and the second clamping structure. The main water inlet 130 on both sides of the blank 1 clamped in the first clamping structure extends in the front and back direction, and the side wings 120 on both sides are respectively aligned with the first processing port 610 on the front and back sides. The mounting groove 111 on the blank 1 clamped in the second clamping structure is directly opposite the second processing port 620.

[0083] In steps S3-S6, the CNC machine tool processes the blank 1 on the preliminary processing station 6a; in step S7, the CNC machine tool processes the blank 1 on the complete processing station 6b.

[0084] In this embodiment, by forming a preliminary processing station 6a and a complete processing station 6b separated on the substrate 6, two sets of blanks 1 can be clamped at the two stations, and the two stations are responsible for different processing steps, thereby realizing parallel processing of multiple workpieces and multiple processes, and greatly improving processing efficiency. The blank 1 clamped in the first clamping structure has its side wing 120 aligned with the first processing port 610, so that the drilling and milling of the receiving groove 121 in S3 can be performed from the first processing port 610 on the back side of the substrate 6. The blank 1 clamped in the second clamping structure has its mounting groove 111 facing the second processing port 620, so that the chamfering cutter 4 in S7 can smoothly extend from the second processing port 620 into the mounting groove 111 to perform deburring and chamfering of curved paths. The setting of the first processing port 610 and the second processing port 620 is precisely matched with the clamping posture of the blank 1, so that multiple processing steps can be completed smoothly after one clamping and positioning, without the need to re-clamp and adjust the workpiece posture, improving efficiency and avoiding errors caused by repeated positioning.

[0085] Please refer to the attached document. Figure 13-15 In some embodiments of this application, the first clamping structure includes a first mounting platform 7 fixedly connected to the top of the substrate 6 and a first pressure plate 8 bolted to the substrate 6, and a first clearance opening 810 is formed vertically through the first pressure plate 8.

[0086] In step S1, the bottom of the blank 1 is formed with a blank shank 160 for clamping the blank 1 by a fixture; in step S2, the blank shank 160 at the bottom of the blank 1 is exposed to the first pressure plate 8 through the first clearance opening 810; in step S3, the milling module on the CNC machine tool removes the blank shank 160 at the bottom of the blank 1 through the first clearance opening 810.

[0087] In this embodiment, by opening a first clearance opening 810 on the first pressure plate 8, it is ensured that the blank shank 160 will not interfere with the first pressure plate 8, and the clamping force is fully applied to the solid surface of the side wing portion 120, ensuring the stability and reliability of the clamping. Furthermore, in step S3, the milling module of the CNC machine tool can directly contact the exposed blank shank 160 through the first clearance opening 810, and the blank shank 160 can be milled without removing the blank 1 from the positioning fixture. This not only reduces the number of processes and shortens the processing cycle, but also avoids positioning errors caused by secondary clamping, ensuring the processing accuracy and consistency of the product.

[0088] The first mounting table 7 and the blank 1 are positioned using contour positioning to ensure that the blank 1 does not wobble when pressed against the first mounting table 7, resulting in high positioning accuracy. The first mounting table 7 is detachably connected to the base plate 6 by screws, which not only facilitates loading and unloading but also allows the positioning fixture to be adapted to different workpieces by changing the first mounting table 7, making it highly versatile. Furthermore, the first mounting table 7 has a pair of first alignment holes 710, which are aligned with the side wing 120 and coaxial with the first machining port 610, allowing the CNC machine tool to perform drilling and milling machining on the side wing 120 through the first machining port 610 and the first alignment holes 710. Furthermore, a first chip removal hole 720 is provided in the middle of the first mounting platform 7, and a second chip removal hole 630 coaxial with the first chip removal hole 720 is provided on the substrate 6. The first chip removal hole 720 and the second chip removal hole 630 are aligned with the mounting groove 111 on the blank 1, so that the chips and waste liquid generated during the drilling and milling of the blank 1 can be discharged from the first chip removal hole 720 and the second chip removal hole 630.

[0089] Please refer to the attached document. Figure 13-15 In some embodiments of this application, the first clamping structure includes a pair of left and right first mounting platforms 7, and the middle part of the first pressure plate 8 is bolted to the base plate 6. The left and right sides of the first pressure plate 8 respectively press two blanks 1 onto the first mounting platforms 7 on both sides. A single first pressure plate 8 presses two blanks 1 simultaneously, resulting in high clamping efficiency. The CNC machine tool can process the two blanks 1 on the first clamping structure at one time, thereby greatly improving processing efficiency.

[0090] The first pressure plate 8 includes four diagonally distributed pressing parts 820. The gap between two adjacent pressing parts 820 is configured as a first clearance opening 810. When the first pressure plate 8 presses the blanks 1 on both sides, the four pressing parts 820 press the corresponding side wings 120, resulting in strong clamping stability. Furthermore, each pressing part 820 has a connecting groove 821 at its bottom, and a rubber gasket 830 is provided in the connecting groove 821. The pressing part 820 is pressed against the side wing 120 through the rubber gasket 830, resulting in stronger clamping force and preventing damage to the bottom surface of the side wing 120. Furthermore, the rubber gasket 830 is connected to the clamping part 820 via a pin 840, and a retaining spring 850 is provided on the top of the first pin 840. When the rubber gasket 830 is pressed against the side wing 120, there is a movable gap between the retaining spring 850 and the top surface of the first pressure plate 8, allowing the rubber gasket 830 and the pin 840 to move up and down relative to the first pressure plate 8. Moreover, the connecting groove 821 is a conical groove, allowing the rubber gasket 830 to be slightly rotated in multiple directions within the connecting groove 821 to adjust its tilt. Since the flatness of the bottom surface of the side wing 120 cannot be guaranteed during the initial forming of the blank 1 in step S1, the rubber gasket 830 can be pressed against the uneven bottom surface of the side wing 120 by the vertical movable space provided by the pin 840 and the retaining spring 850 and the rotational adjustment space provided by the connecting groove 821, thus further ensuring the clamping stability of the first clamping structure. Furthermore, a vertical first limiting pin 640 is provided on the substrate 6, and a corresponding first limiting hole 860 is provided on the first pressure plate 8. When the first pressure plate 8 is installed, the first limiting hole 860 is engaged with the first limiting pin 640, so that when the screw is tightened to press the first pressure plate 8, the first pressure plate 8 will not rotate, thus ensuring the clamping accuracy.

[0091] Please refer to the attached document. Figure 16-18 In some embodiments of this application, the second clamping structure includes a second mounting platform 9 fixedly connected to the top of the substrate 6 and a second pressure plate 10 bolted to the substrate 6, and a second clearance opening 1010 is formed vertically through the second pressure plate 10.

[0092] In step S2, the side wing 120 is exposed to the second pressure plate 10 through the second clearance opening 1010; in step S7, the milling module on the CNC machine tool mills the bottom surface of the side wing 120 through the second clearance opening 1010.

[0093] In this embodiment, during the initial forming of the blank 1 in step S1, the flatness of the bottom surface of the side wing 120 cannot be guaranteed, so the bottom of the side wing 120 needs to be precision milled. However, by opening a second clearance opening 1010 on the second pressure plate 10, the clamping force of the second pressure plate 10 is fully applied to the bottom surface of the main body 110, ensuring the stability and reliability of the clamping. Furthermore, in step S7, the milling module of the CNC machine tool can directly contact the bottom surface of the side wing 120 through the second clearance opening 1010, allowing for precision milling of the side wing 120 without removing the blank 1 from the positioning fixture. This not only reduces the number of processes and shortens the processing cycle but also avoids positioning errors caused by secondary clamping, ensuring the processing accuracy and consistency of the product.

[0094] The second mounting table 9 and the blank 1 are positioned using contour positioning to ensure that the blank 1 does not wobble when pressed against the second mounting table 9, resulting in high positioning accuracy. The second mounting table 9 is detachably connected to the base plate 6 by screws, which not only facilitates loading and unloading but also allows for easy adaptation to different workpieces when the positioning fixture is used to clamp other workpieces, making it highly versatile. The second mounting table 9 has a pair of front and rear second alignment holes 910, which are aligned with the mounting groove 111 and coaxial with the second machining port 620. Furthermore, chip removal grooves 920 are recessed on both sides of the top of the second mounting table 9. The side of the chip removal groove 920 away from the second alignment holes 910 has an opening, allowing chips and waste fluid generated during the drilling and milling of the blank 1 to be discharged from the chip removal grooves 920 on both sides.

[0095] Please refer to the attached document. Figure 16-18 In some embodiments of this application, the first clamping structure includes a pair of second mounting platforms 9 on the left and right, the middle part of the second pressure plate 10 is bolted to the base plate 6, and the two blanks 1 are pressed against the second mounting platforms 9 on the left and right sides of the second pressure plate 10 respectively.

[0096] In this embodiment, the second clamping structure also adopts the same left-right symmetrical layout as the first clamping structure. A single second pressure plate 10 realizes the synchronous clamping of the blanks 1 on both sides, resulting in high clamping efficiency. The CNC machine tool can process the two blanks 1 on the first clamping structure at one time, thereby greatly improving the processing efficiency.

[0097] The second pressure plate 10 has positioning grooves 1020 on both sides of its bottom. Nylon gaskets 1030 are placed within these grooves. The second pressure plate 10 is pressed against the main body 110 by the nylon gaskets 1030, resulting in stronger clamping force and preventing damage to the bottom surface of the main body 110. The nylon gaskets 1030 are screwed to the second pressure plate 10 for easy installation. Furthermore, the base plate 6 has a pair of vertical second limiting pins 650 at the front and rear. The front and rear side walls of the second pressure plate 10 have recessed second limiting holes 1040. When the second pressure plate 10 is installed, the second limiting pins 650 on both sides engage with the corresponding second limiting holes 1040, preventing the second pressure plate 10 from rotating when the bolts are tightened, thus ensuring clamping accuracy.

[0098] Please refer to the attached document. Figure 16-18 In some embodiments of this application, the secondary water inlet 140 and the water outlet 150, which are clamped on the blank 1 of the second clamping structure, extend in the front-back direction; in step S7, the drilling module on the CNC machine tool drills a secondary water inlet hole 141 through the wall of the mounting groove 111 in the secondary water inlet 140 along the axial direction, and drills a water outlet hole 151 through the wall of the mounting groove 111 in the water outlet 150 along the axial direction.

[0099] In this embodiment, a water inlet passage needs to be drilled on the auxiliary water inlet 140, and a water outlet passage needs to be drilled on the water outlet 150. In step S7, the blank 1 clamped in the second clamping structure has had its mounting groove 111 chamfered, and the positioning fixture has provided a precise positioning reference for the relative position of the mounting groove 111 and the main water inlet 130. At this time, the auxiliary water inlet 140 and the water outlet 150 extend in the front-to-back direction, and the CNC machine tool can directly perform the drilling and milling operations of the auxiliary water inlet hole 141 and the water outlet hole 151. Since all machining is completed in one clamping at the fully machining station 6b, the positioning accuracy is high, and there is no cumulative positioning error caused by multiple clampings. This eliminates quality hazards such as water channel misalignment and sealing failure caused by hole position deviation, thus ensuring machining accuracy and product yield.

[0100] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means three or more.

[0101] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A processing technology for a built-in link body, characterized in that, Includes the following steps: S1. The blank part (1) is initially processed and shaped, and an installation groove (111) is opened on the main body (110). S2. Fix the blank (1) to the positioning fixture on the CNC machine tool; S3. A receiving groove (121) is opened on the side wing (120) of the CNC machine tool. S4. The drilling module on the CNC machine tool drives the pre-processing drill bit (5) to drill axially from the outer end of the main water inlet (130) and drill the first water inlet hole (131) to form the wall of the through receiving groove (121). S5. The drilling module on the CNC machine tool drives the three-pointed drill bit (2) to extend axially into the first water inlet hole (131) from the outer end of the main water inlet (130) until the drill tip of the three-pointed drill bit (2) contacts the groove wall of the receiving groove (121) on the side away from the first water inlet hole (131). The three-pointed drill bit (2) further drills into the groove wall of the receiving groove (121) and drills a second water inlet hole (112) that penetrates the groove wall of the mounting groove (111). A burr is formed at the penetration point of the second water inlet hole (112) and the groove wall of the mounting groove (111). The burr is mainly in the form of flakes. S6. The milling module on the CNC machine tool drives the reaming cutter (3) to extend axially into the second water inlet hole (112) from the outer end of the main water inlet (130). The reaming cutter (3) moves circumferentially along the second water inlet hole (112) to mill and enlarge the diameter of the second water inlet hole (112), and mills the sheet-like burrs at the penetration point of the second water inlet hole (112) and the groove wall of the mounting groove (111) into filaments. S7. The milling module on the CNC machine tool drives the chamfering cutter (4) to extend into the mounting groove (111) along the axial direction. The chamfering cutter (4) mills off the filamentous burrs and forms a chamfer along the curved path through the second water inlet hole (112) and the groove wall of the mounting groove (111).

2. The processing technology of the built-in link body according to claim 1, characterized in that, The included angle of the central cutting edge of the three-point drill bit (2) is 80-90°, and the included angle of the secondary cutting edge is 100-110°; in step S5, the pressure on the secondary cutting edge when it breaks through the material is parallel to the axis of the second water inlet hole (112).

3. The processing technology of the built-in link body according to claim 1, characterized in that, The reamer (3) is a spiral groove double-edged milling cutter with a spiral angle of 20-40°. In step S5, the diameter of the second water inlet hole (112) drilled by the three-point drill bit (2) is smaller than the preset size, leaving a milling allowance of 0.01-0.2mm. In step S6, the reamer (3) is used to enlarge the second water inlet hole (112) so as to accurately correct the diameter of the second water inlet hole (112).

4. The processing technology of the built-in link body according to claim 1, characterized in that, The chamfering cutter (4) is a four-flute ball end mill; in step S7, the chamfering cutter (4) is able to perform curved following machining on the tapered groove wall of the mounting slot (111).

5. The processing technology of the built-in link body according to claim 1, characterized in that, In step S4, the feed rate of the pre-processed drill bit (5) when it initially drills into the main water inlet (130) is v1. When the tip of the pre-processed drill bit (5) is about to drill through the wall of the receiving groove (121), the feed rate of the pre-processed drill bit (5) is switched to v2 until it penetrates the wall of the receiving groove (121). v2 is less than v1.

6. The processing technology of the built-in link body according to claim 5, characterized in that, When the tip of the pre-processed drill bit (5) is 2-4 mm away from the wall of the receiving groove (121), the feed rate is switched to v2, and v2 is 40-50% of v1.

7. The processing technology of the built-in link body according to claim 1, characterized in that, The diameter of the pre-machined drill bit (5) is larger than that of the three-pointed drill bit (2); in step S4, the diameter of the first water inlet hole (131) drilled by the pre-machined drill bit (5) is larger than that of the three-pointed drill bit (2).

8. The processing technology of the built-in link body according to claim 1, characterized in that, The positioning fixture includes a substrate (6). The top left and right sides of the substrate (6) are respectively configured as a preliminary processing station (6a) and a complete processing station (6b). A first clamping structure is provided on the preliminary processing station (6a), and a second clamping structure is provided on the complete processing station (6b). A pair of first processing ports (610) are vertically formed on the preliminary processing station (6a), and a second processing port (620) is vertically formed on the complete processing station (6b). In step S2, the positioning fixture clamps and fixes two sets of blanks (1) on the left and right sides through the first clamping structure and the second clamping structure. The main water inlet (130) on both sides of the blank (1) clamped in the first clamping structure extends in the front and back direction, and the side wings (120) on both sides are respectively aligned with the first processing port (610) on the front and back sides. The mounting groove (111) on the blank (1) clamped in the second clamping structure is directly opposite the second processing port (620). In steps S3-S6, the CNC machine tool processes the blank (1) on the preliminary processing station (6a); in step S7, the CNC machine tool processes the blank (1) on the fully processed station (6b).

9. The processing technology of the built-in link body according to claim 8, characterized in that, The first clamping structure includes a first mounting platform (7) fixedly connected to the top of the substrate (6) and a first pressure plate (8) bolted to the substrate (6). A first clearance opening (810) is formed vertically through the first pressure plate (8). In step S1, the bottom of the blank (1) is formed with a blank shank (160) for clamping the blank (1) by a fixture; in step S2, the blank shank (160) at the bottom of the blank (1) is exposed to the first pressure plate (8) through the first clearance opening (810); in step S3, the milling module on the CNC machine tool removes the blank shank (160) at the bottom of the blank (1) through the first clearance opening (810).

10. The processing technology of the built-in link body according to claim 9, characterized in that, The first clamping structure includes a pair of first mounting platforms (7) on the left and right sides. The middle part of the first pressure plate (8) is bolted to the base plate (6), and the two blanks (1) are pressed against the first mounting platforms (7) on the left and right sides respectively. In steps S3-S6, the CNC machine tool processes the two blanks (1) on the first clamping structure at one time.

11. The processing technology of the built-in link body according to claim 8, characterized in that, The second clamping structure includes a second mounting platform (9) fixedly connected to the top of the substrate (6) and a second pressure plate (10) bolted to the substrate (6). A second clearance opening (1010) is formed vertically through the second pressure plate (10). In step S2, the side wing (120) is exposed to the second pressure plate (10) through the second clearance opening (1010); in step S7, the milling module on the CNC machine tool mills the bottom surface of the side wing (120) through the second clearance opening (1010).

12. The processing technology of the built-in link body according to claim 11, characterized in that, The second clamping structure includes a pair of second mounting platforms (9) on the left and right sides. The middle part of the second pressure plate (10) is bolted to the base plate (6), and the two blanks (1) are pressed against the second mounting platforms (9) on the left and right sides of the second pressure plate (10). In step S7, the CNC machine tool can process the two blanks (1) on the first clamping structure at one time.

13. The processing technology of the built-in link body according to claim 8, characterized in that, The secondary water inlet (140) and water outlet (150) clamped on the blank (1) of the second clamping structure extend in the front-to-back direction; in step S7, the drilling module on the CNC machine tool drills a secondary water inlet hole (141) through the wall of the mounting groove (111) on the secondary water inlet (140) along the axial direction, and drills a water outlet hole (151) through the wall of the mounting groove (111) on the water outlet (150) along the axial direction.

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