Rotary engine connecting rod size hole processing device

Abstract

To address the problems of low processing efficiency, difficulty in material handling and loading, and difficulty in clamping and positioning in existing methods for machining large and small holes in engine connecting rods, this invention proposes a disc-type engine connecting rod large and small hole machining device, comprising a frame, a turntable, a stabilizing mechanism, a clamping mechanism, a drilling assembly, an upper chamfering assembly, and a lower chamfering assembly. The frame is a rectangular frame structure. The turntable is disc-shaped and rotatably fixed to the geometric center of the worktable with the center of the disc as its axis. There are three or more stabilizing mechanisms, evenly distributed around the outer edge of the turntable. There are six clamping mechanisms, corresponding to six workstations: loading, drilling, upper chamfering, lower chamfering, cleaning, and unloading. The beneficial technical effects of this invention are that it can perform drilling and chamfering simultaneously, improving processing efficiency; the clamping mechanism, with its molded structure, not only clamps accurately and stably but also facilitates loading and unloading.

Description

Technical Field

[0001] This invention relates to a technology for machining large and small holes in engine connecting rods, and particularly to a rotary table-type device for machining large and small holes in engine connecting rods. Background Technology

[0002] The engine connecting rod is a key component for transmitting engine torque. Its basic shape is a straight, spoon-shaped rod with a connecting hole at each end. One hole rotatably connects to the bottom of the engine piston, and the other connects to the crankshaft. This converts the linear motion of the piston into the circular motion of the crankshaft. Typically, the hole connecting to the crankshaft has a larger diameter and is called the large-end hole; the hole connecting to the piston has a smaller diameter and is called the small-end hole. Together, they are referred to as the engine connecting rod large and small holes (see appendix). Figure 1 To ensure effective connection between the engine connecting rod and the engine crankshaft and piston, and to reduce wobbling or noise, high requirements are placed on the dimensional accuracy, surface roughness, and positional accuracy of the connecting rod bores, especially the consistency of the bore spacing.

[0003] Typically, engine connecting rod blanks are machined using die forging. The resulting connecting rod blank, including the large and small holes, is only a rough shape; the small hole may actually consist of two recesses on each end face, not yet fully penetrated. Therefore, it is necessary to drill the connecting rod's large and small holes and chamfer the two end faces of the machined through holes. To ensure the consistency of the hole spacing in the engine connecting rod, a combination drill bit is usually used to machine the connecting rod's large and small holes. This involves clamping the connecting rod blank and simultaneously drilling both the large and small holes in one operation. Then, the two end faces of the large and small holes are chamfered. Specifically, the existing method for machining engine connecting rod holes involves clamping the connecting rod blank horizontally and vertically. In this case, the axes of the connecting rod blank's large and small holes are horizontally aligned side-by-side. The axis of the combination drill bit is coaxial with the axes of the connecting rod blank's large and small holes. The drilling combination drill bit enters from the right side of the connecting rod blank (or the left side) and simultaneously drills the connecting rod's large and small holes. After drilling is completed, the drilling combination drill bit retracts; the chamfering combination drill bit on the left side of the connecting rod blank enters to chamfer the left end face of the connecting rod's large and small holes. After the chamfering of the left end face is completed, the left chamfering combination drill bit retracts. At this time, the right drilling combination drill bit has been replaced with the right chamfering combination drill bit; the right chamfering combination drill bit enters to chamfer the right end face of the connecting rod's large and small holes. After the chamfering of the right end face is completed, the right chamfering combination drill bit retracts. The clamping mechanism releases the connecting rod blank, and the machined engine connecting rod is removed manually or by a robotic arm. The connecting rod blank is then reinstalled, and the machining of the next engine connecting rod begins. Existing methods for machining the large and small holes of engine connecting rods involve three processes—drilling, chamfering the left end face, and chamfering the right end face—at the same clamping position, requiring three infeeds and retractions, which severely impacts machining efficiency. Furthermore, the connecting rod blank is clamped horizontally and vertically, making material handling, placement, and positioning difficult.

[0004] Clearly, existing methods for machining the large and small holes of engine connecting rods suffer from problems such as low machining efficiency, difficulty in material handling or placement, and difficulty in clamping and positioning. Summary of the Invention

[0005] To address the problems of low processing efficiency, difficulty in material handling or placement, and difficulty in clamping and positioning in existing engine connecting rod hole processing methods, this invention proposes a disc-type engine connecting rod hole processing device.

[0006] This invention relates to a disc-type engine connecting rod large and small hole machining device, comprising a frame, a turntable, stabilizing mechanisms, clamping mechanisms, a drilling assembly, an upper chamfering assembly, and a lower chamfering assembly. The frame is a rectangular frame structure, with a worktable positioned directly above it. The turntable is disc-shaped and rotatably fixed to the geometric center of the worktable, with its center as the axis. Radial grooves with triangular cross-sections are provided along the circumference of the turntable. Three or more stabilizing mechanisms are evenly distributed around the outer edge of the turntable. Six clamping mechanisms are evenly distributed and fixed to the upper surface of the turntable edge, corresponding to six workstations: loading, drilling, upper chamfering, lower chamfering, cleaning, and unloading. The drilling assembly... The combined drilling tool is set on the worktable of the drilling station on the outer edge of the rotary table. Its drill bit points from top to bottom above the clamping mechanism fixed on the rotary table, and the axis of the combined large and small drill bits is coaxial with the axis of the large and small through holes of the clamping mechanism. The upper chamfered combined drilling tool is set on the worktable of the upper chamfered station on the outer edge of the rotary table. Its drill bit points from top to bottom above the clamping mechanism fixed on the rotary table, and the axis of the combined large and small drill bits is coaxial with the axis of the large and small through holes of the clamping mechanism. The lower chamfered combined drilling tool is set on the bottom surface of the worktable of the lower chamfered station on the outer edge of the rotary table. Its drill bit points from bottom to top below the clamping mechanism fixed on the rotary table, and the axis of the combined large and small drill bits is coaxial with the axis of the large and small through holes of the clamping mechanism.

[0007] The stabilizing mechanism includes a base, a support shaft, a roller, and a spring. The base has a U-shaped structure with through holes at both ends. The support shaft is inserted into the through holes of the base, and an annular step is provided on the circumference of the support shaft inside the front through hole of the base. A hinge seat is provided at the front end of the support shaft. The roller is hinged to the front end of the support shaft, and the cross-sectional shape of the roller is semi-circular. The spring is fitted on the outer circle of the support shaft between the front and rear through holes of the base, and the front end of the spring abuts against the annular step of the support shaft, pushing the roller to press against the triangular groove on the periphery of the turntable.

[0008] The clamping mechanism is a molding structure, including a base plate, a template, support columns, dovetail grooves I, an upper pressure plate, a pushing cylinder, a lower pressure plate, and an ejection cylinder. The base plate and template are both rectangular and are fixedly connected to form a rectangular frame structure by support columns positioned between them. A mold hole is provided in the front middle part of the template, and the shape and size of the mold hole match the shape of the connecting rod. Dovetail grooves I are provided on both sides of the mold hole. The upper pressure plate is a rectangular plate with dovetail seats I at both ends, which are inserted into the dovetail grooves I on the template. An upper mold cavity is provided on the bottom surface of the upper pressure plate. The shape and size of the upper mold cavity match the shape of the connecting rod, and the corresponding holes of the connecting rod... The position is provided with through holes of different diameters, larger than the connecting rod's large and small holes; the pushing cylinder is fixed to the middle rear side of the template, and its piston rod end is connected to the middle of the rear end face of the upper pressure plate, pushing the upper pressure plate to move back and forth in the dovetail groove I; the outer contour shape and size of the lower pressure plate match the shape of the connecting rod, and through holes of different diameters, larger than the connecting rod's large and small holes, are provided at the corresponding positions; the thickness of the lower pressure plate is greater than that of the template and is fitted into the mold hole of the template, and a hinge seat is provided in the middle of the bottom surface of the lower pressure plate; the piston of the ejector cylinder is fixed vertically upward on the surface of the bottom plate, and the end of the piston is hinged to the bottom surface of the lower pressure plate, pushing the lower pressure plate to move up and down in the mold hole.

[0009] Furthermore, the drilling assembly and the chamfering assembly have the same structure, differing only in the angle and diameter of the drill bit head. The assembly includes a base, dovetail groove II, dovetail seat II, a combined drill bit, a cylinder fixing plate, and an infeed cylinder. The base is L-shaped, with its short side fixed to the worktable. A dovetail groove II is provided on the outer side of the long side of the L-shaped base. The dovetail seat II is a cuboid and is slidably inserted into the dovetail groove II. The combined drill bit is fixed to the back of the dovetail seat II, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism. The cylinder fixing plate is rectangular and fixed to the top of the long side of the L-shaped base. The piston of the infeed cylinder is fixed downwards to the upper surface of the cylinder fixing plate, and its piston end passes through the cylinder fixing plate and is fixedly connected to the upper surface of the combined drill bit.

[0010] Furthermore, the lower chamfered combined drill bit is inverted and fixed to the bottom surface of the workbench plate at the lower chamfering station, including a support, a dovetail groove III, a dovetail seat III, a combined drill bit, and a chamfering cylinder; the support is L-shaped, with the short side of the L-shaped support fixed to the bottom surface of the workbench plate, and a dovetail groove III is provided on the outer side of the long side of the L-shaped base; the dovetail seat III is a cuboid and is slidably inserted into the dovetail groove III; the combined drill bit is fixed to the back of the dovetail seat III, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism; the piston of the chamfering cylinder is fixed downward on the upper surface of the workbench plate, and its piston end passes through the workbench plate and is fixedly connected to the upper surface of the combined drill bit.

[0011] The beneficial technical effects of the disc-type engine connecting rod large and small hole processing device of the present invention are that it can perform drilling and chamfering processing at the same time, which improves processing efficiency; the clamping mechanism with molding structure is not only accurate and stable, but also convenient for loading or unloading. Attached Figure Description

[0012] Appendix Figure 1 This is a 3D schematic diagram of a common engine connecting rod specification;

[0013] Appendix Figure 2 This is a three-dimensional schematic diagram of the disc engine connecting rod large and small hole machining device of the present invention;

[0014] Appendix Figure 3 This is a three-dimensional schematic diagram of the disc engine connecting rod large and small hole processing device of the present invention from another angle;

[0015] Appendix Figure 4 This is a three-dimensional schematic diagram of the clamping mechanism of the present invention;

[0016] Appendix Figure 5 This is a three-dimensional schematic diagram of the clamping mechanism of the present invention from another angle;

[0017] Appendix Figure 6 This is a three-dimensional schematic diagram of the clamping mechanism of the present invention in the clamping state;

[0018] Appendix Figure 7 This is a three-dimensional schematic diagram of the drilling assembly tool of the present invention;

[0019] Appendix Figure 8 This is a three-dimensional schematic diagram of the chamfered combined drilling tool of the present invention;

[0020] Appendix Figure 9 This is a partial three-dimensional schematic diagram of another angle of the chamfered combined drill bit of the present invention.

[0021] The invention's disc engine connecting rod large and small hole machining device will be further described below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0022] Appendix Figure 2 This is a three-dimensional schematic diagram of the disc engine connecting rod large and small hole machining device of the present invention, attached. Figure 3 This is a three-dimensional schematic diagram from another angle of the disc engine connecting rod large and small hole machining device of the present invention, attached. Figure 4 This is a three-dimensional schematic diagram of the clamping mechanism of the present invention, attached. Figure 5 This is a three-dimensional schematic diagram of the clamping mechanism of the present invention from another angle, attached. Figure 6This is a three-dimensional schematic diagram of the clamping mechanism of the present invention in the clamping state. In the figure, 1 is the frame, 2 is the turntable, 3 is the stabilizing mechanism, 3-1 is the base, 3-2 is the support shaft, 3-3 is the roller, 3-4 is the spring, 4 is the clamping mechanism, 4-1 is the base plate, 4-2 is the template, 4-3 is the support column, 4-4 is the dovetail groove I, 4-5 is the upper pressure plate, 4-6 is the pushing cylinder, 4-7 is the lower pressure plate, 4-8 is the ejection cylinder, 5 is the drilling assembly, 6 is the upper chamfering assembly, and 7 is the lower chamfering assembly. As shown in the figure, the disc-type engine connecting rod large and small hole processing device of the present invention includes a frame 1, a turntable 2, a stabilizing mechanism 3, a clamping mechanism 4, a drilling combination tool 5, an upper chamfering combination tool 6, and a lower chamfering combination tool 7; the frame 1 is a rectangular frame structure, and a worktable is arranged on the top of the rectangular frame; the turntable 2 is disc-shaped and rotatably fixed to the geometric center of the worktable with the center of the disc as the axis; a triangular groove is radially arranged on the edge of the turntable; there are three or more stabilizing mechanisms 3, evenly distributed on the outer side of the turntable edge; there are six clamping mechanisms 4, evenly distributed on the circumference. Fixed to the upper surface of the turntable edge, corresponding to six workstations: loading, drilling, upper chamfering, lower chamfering, cleaning, and unloading. The drilling assembly 5 is mounted on the worktable of the drilling workstation outside the turntable edge, with its drill bit pointing downwards towards the clamping mechanism fixed on the turntable, and the axis of the large and small combined drill bits coaxial with the axis of the large and small through holes of the clamping mechanism. The upper chamfering assembly 6 is mounted on the worktable of the upper chamfering workstation outside the turntable edge, with its drill bit pointing downwards towards the clamping mechanism fixed on the turntable, and the axis of the large and small combined drill bits coaxial with the axis of the large and small through holes of the clamping mechanism. The lower chamfering assembly 6... The chamfered combination drill bit 7 is set on the bottom surface of the worktable plate at the lower chamfering station on the outer edge of the rotary table. Its drill bit points upwards towards the clamping mechanism fixed on the rotary table, and the axis of the large and small combination drill bits is coaxial with the axis of the large and small through holes of the clamping mechanism. The stabilizing mechanism 3 includes a base 3-1, a support shaft 3-2, a roller 3-3, and a spring 3-4. The base 3-1 has a U-shaped structure with through holes at both ends. The support shaft 3-2 is inserted into the through holes of the base, and an annular step is provided on the circumference of the support shaft inside the front through hole of the base. A hinge seat is provided at the front end of the support shaft. The roller 3-3 is hinged... At the front end of the support shaft, the roller has a semi-circular cross-sectional shape; the spring 3-4 is fitted on the outer circle of the support shaft between the front and rear through holes of the base, and the front end of the spring abuts against the annular step of the support shaft, pushing the roller to press against the triangular groove on the periphery of the turntable; the clamping mechanism 4 is a molding structure, including a base plate 4-1, a template 4-2, a support column 4-3, a dovetail groove I 4-4, an upper pressure plate 4-5, a pushing cylinder 4-6, a lower pressure plate 4-7, and an ejection cylinder 4-8; the base plate 4-1 and the template 4-2 are both rectangular, and are fixedly connected to form a rectangular frame structure by the support column 4-3 set between the base plate and the template;A mold hole is provided in the front middle part of the template, and the shape and size of the mold hole match the shape of the connecting rod. Dovetail grooves I 4-4 are provided on both sides of the mold hole. The upper pressure plate 4-5 is a rectangular plate with dovetail seats I at both ends, which are inserted into the dovetail grooves I on the template. An upper mold cavity is provided on the bottom surface of the upper pressure plate. The shape and size of the upper mold cavity match the shape of the connecting rod, and through holes with a diameter larger than the connecting rod's large and small holes are provided at the corresponding positions of the large and small holes. The pushing cylinder 4-6 is fixed to the rear middle part of the template, and its piston rod end The head is connected to the middle of the rear end face of the upper pressure plate, pushing the upper pressure plate to move back and forth within the dovetail groove I; the outer contour shape and size of the lower pressure plate 4-7 match the shape of the connecting rod, and through holes with a diameter larger than the connecting rod's large and small holes are provided at the corresponding positions of the large and small holes; the thickness of the lower pressure plate is thicker than the template and is fitted into the mold hole of the template, and a hinge seat is provided in the middle of the bottom surface of the lower pressure plate; the piston of the ejector cylinder 4-8 is vertically fixed to the surface of the base plate, and the end of the piston is hinged to the bottom surface of the lower pressure plate, pushing the lower pressure plate to move up and down within the mold hole. The disc engine connecting rod large and small hole processing device of the present invention has six stations: loading, drilling, upper chamfering, lower chamfering, cleaning, and unloading. The rotation of the turntable allows each clamping mechanism to stop and process at each of the above stations, effectively improving processing efficiency. To prevent the turntable from wobbling and deviating, three or more stabilizing mechanisms are evenly distributed on the outer circumference of the turntable. The rollers of these stabilizing mechanisms press against triangular grooves along the circumference of the turntable, thus restricting its rotation. The clamping mechanism of the disc-type connecting rod hole drilling device of this invention is a molding structure. A mold hole, matching the shape and size of the connecting rod, accommodates the connecting rod blank. The upper and lower pressure plates press and fix the connecting rod blank, ensuring accurate positioning and a very stable clamping when the connecting rod blank is held. During the actual processing, at the loading station, the connecting rod blank is placed into the die hole of the clamping mechanism by a robotic arm or manually. A push cylinder then pushes the upper pressure plate onto the die hole, ensuring that the upper die cavity on the bottom surface of the upper pressure plate is aligned with the die hole. At this time, the push cylinder pushes the lower pressure plate upwards, pressing the connecting rod blank between the upper and lower pressure plates. The turntable rotates for the first time, and the clamping mechanism rotates to the drilling station, where the drilling assembly drills the connecting rod blank. The turntable rotates a second time, and the clamping mechanism... The rotary table rotates to the upper chamfering position, where the upper chamfering assembly drill bit performs upper chamfering on the connecting rod blank. The rotary table rotates a third time, and the clamping mechanism rotates to the lower chamfering position, where the lower chamfering assembly drill bit performs lower chamfering on the connecting rod blank. The rotary table rotates a fourth time, and the clamping mechanism rotates to the cleaning position, where an air nozzle or cleaning broom cleans the iron filings around the connecting rod blank. The rotary table rotates a fifth time, and the clamping mechanism rotates to the unloading position, where a robotic arm or manual labor removes the connecting rod blank, thus completing the processing of the connecting rod blank.On the sixth rotation of the turntable, the clamping mechanism rotates to the loading station, beginning the next round of processing. In fact, the entire processing is continuous: while the first connecting rod blank is being drilled, the second connecting rod blank is being loaded; while the first connecting rod blank is being chamfered, the second connecting rod blank is being drilled, and simultaneously, the third connecting rod blank is being loaded; and so on, thus achieving continuous processing and improving processing efficiency.

[0023] Appendix Figure 7 This is a three-dimensional schematic diagram of the drilling assembly of the present invention. In the figure, 5-1 is the base, 5-2 is the dovetail groove II, 5-3 is the dovetail seat II, 5-4 is the combined drill bit, 5-5 is the cylinder fixing plate, and 5-6 is the feed cylinder. As shown in the figure, as one of the preferred solutions, the drilling assembly and the chamfering assembly have the same structure, differing only in the angle and diameter of the drill bit head. The assembly includes a base 5-1, a dovetail groove II 5-2, a dovetail seat II 5-3, a combined drill bit 5-4, a cylinder fixing plate 5-5, and an infeed cylinder 5-6. The base 5-1 is L-shaped, with its short side fixed to the worktable. The dovetail groove II 5-2 is located on the outer side of the long side of the L-shaped base. The dovetail seat II 5-3 is a cuboid and is slidably inserted into the dovetail groove II. The combined drill bit 5-4 is fixed to the back of the dovetail seat II, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism. The cylinder fixing plate 5-5 is rectangular and fixed to the top of the long side of the L-shaped base. The piston of the infeed cylinder 5-6 is fixed downwards on the upper surface of the cylinder fixing plate, and its piston end passes through the cylinder fixing plate and is fixedly connected to the upper surface of the combined drill bit. Clearly, the extension or retraction of the piston in the feed cylinder corresponds to the drill bit's feed or retraction. For drilling, the drill bit's diameter should be the same as the designed hole diameter, and the drill bit's head angle should be relatively sharp to facilitate drilling. For chamfering, the drill bit's diameter should be larger than the designed hole diameter, and the drill bit's head angle should be relatively gentle to facilitate chamfering the edges of the drilled through hole.

[0024] Appendix Figure 8 This is a three-dimensional schematic diagram of the chamfered combined drill bit of the present invention, attached. Figure 9This is a partial three-dimensional schematic diagram of the chamfered combined drill bit of the present invention from another angle. In the figure, 1 is the frame, 2 is the turntable, 3 is the stabilizing mechanism, 7-1 is the support, 7-2 is the dovetail groove III, 7-3 is the dovetail seat III, 7-4 is the combined drill bit, and 7-5 is the chamfering cylinder. As shown in the figure, as one of the preferred solutions, the lower chamfering combined drill bit is inverted and fixed on the bottom surface of the workbench plate at the lower chamfering station. It includes a support 7-1, a dovetail groove III 7-2, a dovetail seat III 7-3, a combined drill bit 7-4, and a chamfering cylinder 7-5. The support 7-1 is L-shaped, with its short side fixed to the bottom surface of the workbench plate. The dovetail groove III 7-2 is provided on the outer side of the long side of the L-shaped base. The dovetail seat III 7-3 is a cuboid and is slidably inserted into the dovetail groove III. The combined drill bit 7-4 is fixed on the back of the dovetail seat III, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism. The piston of the chamfering cylinder 7-5 is fixed downward on the upper surface of the workbench plate, and its piston end passes through the workbench plate and is fixedly connected to the upper surface of the combined drill bit. Because it's a downward chamfer, the chamfering drill bit needs to be used from bottom to top. Therefore, the entire downward chamfering drill assembly is inverted. The drill bit needs to pass through the worktable and enter the through hole of the clamping mechanism's lower pressure plate before chamfering the lower edge of the connecting rod blank's through hole. Clearly, a through hole is provided at the corresponding position on the worktable to allow the drill bit to pass through. To prevent the drill bit from affecting the rotation of the turntable, when the downward chamfering is not performed, the height of the drill bit extending from the worktable is lower than the lower surface of the turntable.

[0025] Obviously, the beneficial technical effect of the disc engine connecting rod large and small hole processing device of the present invention is that it can perform drilling and chamfering simultaneously, thus improving processing efficiency; the clamping mechanism with molding structure is not only accurate and stable, but also convenient for loading or unloading.

Claims

1. A rotary engine connecting rod large and small hole machining device, characterized in that, The processing device, The system includes a frame, a turntable, stabilizing mechanisms, clamping mechanisms, a drilling assembly, an upper chamfering assembly, and a lower chamfering assembly. The frame is a rectangular frame structure with a worktable positioned directly above it. The turntable is disc-shaped and rotatably fixed to the geometric center of the worktable, with its center as the axis. Triangular grooves are radially arranged along the edge of the turntable's circumference. There are three or more stabilizing mechanisms, evenly distributed around the outer edge of the turntable. Six clamping mechanisms are evenly distributed and fixed to the upper surface of the turntable's edge, corresponding to six workstations: loading, drilling, upper chamfering, lower chamfering, cleaning, and unloading. The drilling assembly is located on the turntable. On the workbench of the drilling station on the outer edge of the turntable, the drill bit points from top to bottom above the clamping mechanism fixed on the turntable, and the axis of the large and small combined drill bit is coaxial with the axis of the large and small through holes of the clamping mechanism; the upper chamfered combined drill bit is set on the workbench of the upper chamfered station on the outer edge of the turntable, the drill bit points from top to bottom above the clamping mechanism fixed on the turntable, and the axis of the large and small combined drill bit is coaxial with the axis of the large and small through holes of the clamping mechanism; the lower chamfered combined drill bit is set on the bottom surface of the workbench of the lower chamfered station on the outer edge of the turntable, the drill bit points from bottom to top below the clamping mechanism fixed on the turntable, and the axis of the large and small combined drill bit is coaxial with the axis of the large and small through holes of the clamping mechanism; in; The stabilizing mechanism includes a base, a support shaft, a roller, and a spring. The base has a U-shaped structure with through holes at both ends. The support shaft is inserted into the through holes of the base, and an annular step is provided on the circumference of the support shaft inside the front through hole of the base. A hinge seat is provided at the front end of the support shaft. The roller is hinged to the front end of the support shaft, and the cross-sectional shape of the roller is semi-circular. The spring is fitted on the outer circle of the support shaft between the front and rear through holes of the base, and the front end of the spring abuts against the annular step of the support shaft, pushing the roller to press against the triangular groove on the periphery of the turntable. The clamping mechanism is a molding structure, including a base plate, a template, support columns, dovetail grooves I, an upper pressure plate, a pushing cylinder, a lower pressure plate, and an ejection cylinder. The base plate and template are both rectangular and are fixedly connected to form a rectangular frame structure by support columns positioned between them. A mold hole is provided in the front middle part of the template, and the shape and size of the mold hole match the shape of the connecting rod. Dovetail grooves I are provided on both sides of the mold hole. The upper pressure plate is a rectangular plate with dovetail seats I at both ends, which are inserted into the dovetail grooves I on the template. An upper mold cavity is provided on the bottom surface of the upper pressure plate. The shape and size of the upper mold cavity match the shape of the connecting rod, and the corresponding holes of the connecting rod... The position is provided with through holes of different diameters, larger than the connecting rod's large and small holes; the pushing cylinder is fixed to the middle rear side of the template, and its piston rod end is connected to the middle of the rear end face of the upper pressure plate, pushing the upper pressure plate to move back and forth in the dovetail groove I; the outer contour shape and size of the lower pressure plate match the shape of the connecting rod, and through holes of different diameters, larger than the connecting rod's large and small holes, are provided at the corresponding positions; the thickness of the lower pressure plate is greater than that of the template and is fitted into the mold hole of the template, and a hinge seat is provided in the middle of the bottom surface of the lower pressure plate; the piston of the ejector cylinder is fixed vertically upward on the surface of the bottom plate, and the end of the piston is hinged to the bottom surface of the lower pressure plate, pushing the lower pressure plate to move up and down in the mold hole.

2. The disc engine connecting rod large and small hole machining device according to claim 1, characterized in that, The drilling assembly and the chamfering assembly have the same structure, differing only in the angle and diameter of the drill bit head. The assembly includes a base, dovetail groove II, dovetail seat II, a combined drill bit, a cylinder fixing plate, and a feed cylinder. The base is L-shaped, with its short side fixed to the worktable. A dovetail groove II is provided on the outer side of the long side of the L-shaped base. The dovetail seat II is a cuboid and is slidably inserted into the dovetail groove II. The combined drill bit is fixed to the back of the dovetail seat II, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism. The cylinder fixing plate is rectangular and fixed to the top of the long side of the L-shaped base. The piston of the feed cylinder is fixed downwards to the upper surface of the cylinder fixing plate, and its piston end passes through the cylinder fixing plate and is fixedly connected to the upper surface of the combined drill bit.

3. The disc engine connecting rod large and small hole machining device according to claim 1, characterized in that, The lower chamfered combined drill bit is inverted and fixed to the bottom surface of the workbench plate at the lower chamfering station. It includes a support, a dovetail groove III, a dovetail seat III, a combined drill bit, and a chamfering cylinder. The support is L-shaped, with its short side fixed to the bottom surface of the workbench plate. A dovetail groove III is provided on the outer side of the long side of the L-shaped base. The dovetail seat III is a cuboid and is slidably inserted into the dovetail groove III. The combined drill bit is fixed to the back of the dovetail seat III, and the axes of the large and small drill bits are coaxial with the axes of the large and small through holes of the clamping mechanism. The piston of the chamfering cylinder is fixed downward on the upper surface of the workbench plate, and its piston end passes through the workbench plate and is fixedly connected to the upper surface of the combined drill bit.

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