System and method for machining both ends of an engine crankshaft

Abstract

The present invention relates to a system and method for processing both ends of an engine crankshaft. It solves the technical problems of the existing difficult control of machining accuracy and low machining efficiency. It comprises a bed base, a mounting seat is provided on one side of the upper end of the bed base, a mounting surface is provided on one side of the mounting seat, a mid-drive spindle is provided in the middle of the mounting surface, a movable seat is movably provided at both ends of one side of the mounting seat, a servo turret is provided on the movable seat, a turret movable drive structure is provided between the movable seat and the mounting seat, a feeding translation mechanism for axially positioning the crankshaft workpiece is provided between the movable seats and can transport the crankshaft workpiece to the mid-drive spindle under the action of the turret movable drive structure, and a multiple clamping structure is provided in the mid-drive spindle. The advantage is that the multiple clamping structures are installed on the mid-drive spindle to fix the crankshaft workpiece, and at the same time, the crankshaft workpiece is transported to the mid-drive spindle through the feeding translation mechanism, thereby ensuring the clamping accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining machine tools, and in particular relates to a system and method for machining both ends of an engine crankshaft. Background Art

[0002] The engine crankshaft is a critical component second only to the cylinder block, and its machining quality directly impacts the overall engine performance. The connecting rod neck is a crucial component of the crankshaft, so its machining quality directly impacts engine performance. The engine crankshaft is a special-shaped part, and traditional machining methods require turning it around, requiring multiple clamping operations, which is cumbersome and difficult to control clamping accuracy. An alternative method is to use a dual-spindle and steady rest combination, but this also requires machining one end before machining the other, making machining accuracy difficult to control and resulting in low efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a system for machining both ends of an engine crankshaft in view of the above problems.

[0004] Another object of the present invention is to provide a method for machining both ends of an engine crankshaft in response to the above-mentioned problem.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a system for processing both ends of an engine crankshaft, comprising a bed base, a mounting seat is provided on one side of the upper end of the bed base, one side of the mounting seat has an inclined mounting surface, a middle drive spindle is provided in the middle of the mounting surface, the mounting seat has one side of the mounting surface and two ends thereof are movably provided with movable seats located on both sides of the middle drive spindle, a servo turret is provided on the movable seat, a turret movable driving structure is provided between the movable seat and the mounting seat, which can enable the movable seat to move along the length direction of the mounting surface so that the two movable seats are close to or away from each other and can enable the movable seat to move along the width direction of the mounting surface, a feeding translation mechanism is provided between the movable seats for axially positioning the crankshaft workpiece and can transport the crankshaft workpiece to the middle drive spindle under the action of the turret movable driving structure, and a multiple clamping structure for clamping the crankshaft workpiece is provided in the middle drive spindle. The crankshaft workpiece is transported to the mid-drive spindle through the feeding translation mechanism, and then fixed with a multiple clamping structure to ensure clamping accuracy. At the same time, the servo turret synchronously processes the end of the crankshaft workpiece through the turret's active drive structure, thereby improving processing efficiency and processing accuracy.

[0006] In the aforementioned engine crankshaft end processing system, a spindle mounting seat is provided in the middle of the mounting surface, a mounting cavity is provided on the inner circumference of the spindle mounting seat, an opening is provided at one end of the spindle mounting seat that communicates with the mounting cavity, and a fixed seat is provided at the end of the spindle mounting seat away from the opening. The middle drive spindle is disposed in the mounting cavity, and has a rotating portion, a hydraulic portion is provided at one end of the rotating portion, and the hydraulic portion is in contact with the fixed seat at the end away from the rotating portion, and a workpiece inlet is provided on the inner circumference of the fixed seat. The crankshaft workpiece is transported from the workpiece inlet into the middle drive spindle, which clamps the crankshaft workpiece via the hydraulic portion and then rotates the crankshaft workpiece via the rotating portion.

[0007] In the aforementioned engine crankshaft end machining system, the multi-clamping structure includes a hydraulic chuck disposed circumferentially inwardly of the hydraulic unit, the chuck having a chuck hole defined thereon. At least two jaws are circumferentially disposed on one end of the fixed base remote from the spindle mounting base. One end of the crankshaft workpiece is disposed within the chuck hole, and the outer circumferential surface of the crankshaft workpiece contacts the jaws. The hydraulic chuck is used to clamp one end of the crankshaft workpiece, and the jaws are used to clamp the outer side of the crankshaft workpiece.

[0008] In the above-mentioned engine crankshaft two-end processing system, the feeding translation mechanism includes a material pushing and pressing moving component arranged at the lower end of a moving seat close to one end of a fixed seat and a material receiving and pressing telescopic component arranged at the lower end of another moving seat.

[0009] In the above-mentioned engine crankshaft end processing system, the material receiving and pressing telescopic assembly includes a material receiving bracket, a material receiving servo electric cylinder is connected to the material receiving bracket, and a material receiving rod is provided near the opening end of the material receiving servo electric cylinder, which axially shuttles through the inner side of the middle drive main shaft and extends to the outer side of the middle drive main shaft; the material pushing and pressing movable assembly includes a material pushing seat, a material pushing seat is provided with a material pushing connection hole on the side away from the moving seat, a material pushing seat is connected to a material pushing rod near the fixed seat end, one end of the material pushing rod has a material pushing rod connecting portion arranged in the material pushing connection hole, and both the material pushing rod and the material receiving rod are provided with an elastic pressing assembly. The material pushing rod moves through the moving seat, and the material receiving rod moves through the material receiving servo electric cylinder. The moving seat and the material receiving servo electric cylinder synchronously control the movement of the material pushing rod and the material receiving rod, thereby improving stability.

[0010] In the aforementioned engine crankshaft end machining system, the elastic pressing assembly includes a cylinder extension sleeve disposed at the end of a material receiving rod remote from the material receiving servo cylinder. A pin portion is disposed at one end of the cylinder extension sleeve, which contacts the end of the crankshaft workpiece. A material receiving spring member is disposed between the cylinder extension sleeve and the pin portion. Furthermore, a material pushing spring member is disposed within the pusher seat, which contacts the connecting portion of the pusher rod. The material receiving spring member and the material pushing spring member act as a buffer.

[0011] In the above-mentioned engine crankshaft end processing system, the mounting seat is provided with a mounting groove on the side away from the mounting surface, a spindle motor is provided in the mounting groove, the mounting groove is provided with a belt channel radially passing through the mounting seat at one end close to the output shaft of the spindle motor, and a hydraulic channel is provided on one side of the belt channel, the spindle mounting seat is provided with a transmission port at one end close to the mounting surface, a hydraulic port is provided on one side of the transmission port, the transmission port and the hydraulic port are both connected to the mounting cavity, the belt channel is connected to the rotating part through the transmission port, and the hydraulic channel is connected to the hydraulic part through the hydraulic port.

[0012] In the above-mentioned engine crankshaft end processing system, the turret movable drive structure includes a Z-axis drive groove arranged at both ends of the mounting surface, Z-axis guide rails are respectively provided on both sides of the Z-axis drive groove, a Z-axis slide is provided on the outside of the Z-axis drive groove, a Z-axis screw drive assembly connected to the Z-axis slide is provided in the Z-axis drive groove, a plurality of Z-axis sliders connected to the Z-axis guide rail are provided on one side of the Z-axis slide, an X-axis drive groove is provided on the side of the Z-axis slide away from the Z-axis slider, X-axis guide rails are respectively provided on both sides of the X-axis drive groove, the side of the moving seat away from the servo turret is connected to the X-axis guide rail through the X-axis slider, and an X-axis screw drive assembly connected to the moving seat is provided in the X-axis drive groove, and the two servo turrets are provided with a turret disk at the opposite end, and the turret disk is provided with a plurality of processing tools.

[0013] In the above-mentioned engine crankshaft end processing system, the bed base is provided with a chip groove on the side away from the mounting seat, a chip hole is provided in the middle of the chip groove, the mid-drive spindle is located directly above the chip hole, and both ends of the chip hole are provided with oblique portions inclined downward along the direction of the chip hole.

[0014] A method for machining both ends of an engine crankshaft, the method comprising the following steps:

[0015] S1. One end of the crankshaft workpiece contacts the material receiving rod, and the other end contacts the push rod. The push rod and the material receiving rod press the crankshaft workpiece tightly. At the same time, the crankshaft workpiece is moved into the middle drive spindle under the drive of the moving seat and the material receiving servo cylinder.

[0016] S2. After the crankshaft workpiece is moved to the interior of the middle drive spindle, the clamping claws fix the outer side of the crankshaft workpiece. At the same time, the end of the crankshaft workpiece located inside the middle drive spindle is fixed to the hydraulic chuck. When the crankshaft workpiece is fixed, the push rod and the receiving rod begin to reset.

[0017] S3. The two servo turrets first perform inner hole processing on the center of the end of the crankshaft workpiece, then perform thread processing on the circumferential outer side of the end of the crankshaft workpiece, and then perform chamfer outer circle processing on the end of the crankshaft workpiece. The two servo turrets perform processing synchronously.

[0018] Compared with the existing technology, the advantages of the present invention are:

[0019] 1. This device installs multiple clamping structures on the mid-drive spindle to fix the crankshaft workpiece. At the same time, the crankshaft workpiece is transported into the mid-drive spindle through a feeding translation mechanism, ensuring clamping accuracy;

[0020] 2. The device uses two servo turrets to synchronously process both ends of the crankshaft workpiece, which improves the processing efficiency, optimizes the previous processing technology of the crankshaft workpiece, and ensures the processing accuracy of the crankshaft workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the present invention from another perspective.

[0023] Figure 3 It is a structural explosion diagram of the turret movable drive structure in the present invention.

[0024] Figure 4 It is a structural exploded view of the material splicing, top-pressing and telescopic assembly in the present invention.

[0025] Figure 5 It is a structural explosion diagram of the pusher, pressurizing and moving assembly in the present invention.

[0026] Figure 6 It is a structural schematic diagram of the feeding translation mechanism and the crankshaft workpiece in the present invention.

[0027] Figure 7 It is a structural schematic diagram of the main shaft mounting seat in the present invention.

[0028] Figure 8 It is a structural sectional view of the spindle mounting seat in the present invention.

[0029] In the figure: bed base 1, mounting seat 11, mounting surface 12, spindle mounting seat 121, moving seat 13, servo turret 14, crankshaft workpiece 15, mounting cavity 16, opening 17, fixed seat 18, turret plate 19, processing tool 20, mid-drive spindle 2, rotating part 21, hydraulic part 22, workpiece inlet 23, turret movable drive structure 3, Z-axis drive slot 31, Z-axis guide rail 32, Z-axis slide 33, Z-axis screw drive assembly 34, Z-axis slider 35, X-axis drive slot 36, X-axis guide rail 37, X-axis slider 38, X-axis screw drive assembly 39, feeding translation mechanism 4 , pushing and pressing moving component 41, material receiving and pressing telescopic component 42, material receiving bracket 43, material receiving servo electric cylinder 44, material receiving rod 45, material pushing seat 46, material pushing connecting hole 47, material pushing rod 48, material pushing rod connecting part 49, multiple clamping structure 5, hydraulic chuck component 51, chuck hole 52, claw component 53, elastic pressing component 6, electric cylinder extension sleeve 61, ejector part 62, material receiving spring component 63, material pushing spring component 64, mounting groove 71, spindle motor 72, belt channel 73, hydraulic channel 74, transmission port 75, hydraulic port 76, chip dropping groove 81, chip dropping hole 82, oblique part 83. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1-8 As shown, a system for processing both ends of an engine crankshaft includes a bed base 1, a mounting seat 11 is provided on one side of the upper end of the bed base 1, and a mounting surface 12 is provided on one side of the mounting seat 11. A middle drive spindle 2 is provided in the middle of the mounting surface 12, and the mounting seat 11 has a side of the mounting surface 12, and two ends thereof are movably provided with movable seats 13 located on both sides of the middle drive spindle 2. A servo turret 14 is provided on the movable seat 13, and a turret movable driving structure 3 is provided between the movable seat 13 and the mounting seat 11, which can move the movable seat 13 along the length direction of the mounting surface 12 so that the two movable seats 13 are close to or away from each other and can move the movable seat 13 along the width direction of the mounting surface 12. A feeding translation mechanism 4 for axially positioning a crankshaft workpiece 15 and capable of transporting the crankshaft workpiece 15 to the middle drive spindle 2 under the action of the turret movable driving structure 3 is provided between the movable seats 13, and a multiple clamping structure 5 for clamping the crankshaft workpiece 15 is provided in the middle drive spindle 2. The crankshaft workpiece 15 is transported to the middle drive spindle 2 through the feeding translation mechanism 4, and then the crankshaft workpiece 15 is fixed by the multiple clamping structure 5, thereby ensuring the clamping accuracy. At the same time, the servo turret 14 synchronously processes the end of the crankshaft workpiece 15 through the turret movable drive structure 3, thereby improving the processing efficiency and processing accuracy.

[0032] Combine Figure 1 and Figure 8As shown, a spindle mounting seat 121 is provided in the middle of the mounting surface 12. A mounting cavity 16 is provided on the inner side of the spindle mounting seat 121. An opening 17 communicating with the mounting cavity 16 is provided at one end of the spindle mounting seat 121. A fixed seat 18 is provided at the end of the spindle mounting seat 121 away from the opening 17. The middle drive spindle 2 is disposed in the mounting cavity 16. The middle drive spindle 2 has a rotating portion 21. A hydraulic portion 22 is provided at one end of the rotating portion 21. The end of the hydraulic portion 22 away from the rotating portion 21 is in contact with the fixed seat 18. A workpiece inlet 23 is provided on the inner side of the fixed seat 18. The crankshaft workpiece 15 is transported from the workpiece inlet 23 into the interior of the middle drive spindle 2. The middle drive spindle 2 clamps the crankshaft workpiece 15 via the hydraulic portion 22 and then rotates the crankshaft workpiece 15 via the rotating portion 21.

[0033] The multiple clamping structure 5 includes a hydraulic chuck 51 disposed circumferentially inwardly of the hydraulic unit 22. A chuck hole 52 is defined on the circumferential inwardly of the hydraulic chuck 51. At least two jaws 53 are circumferentially defined on the end of the fixed seat 18 away from the spindle mounting seat 121. One end of the crankshaft workpiece 15 is disposed within the chuck hole 52, and the circumferential outer side of the crankshaft workpiece 15 contacts the jaws 53. The hydraulic chuck 51 is used to clamp one end of the crankshaft workpiece 15, while the jaws 53 are used to clamp the outer side of the crankshaft workpiece 15.

[0034] Combine Figure 4 、 Figure 5 and Figure 6 As shown, the feeding translation mechanism 4 includes a material pushing and pressing moving component 41 arranged at the lower end of the moving seat 13 near one end of the fixed seat 18 and a material receiving and pressing telescopic component 42 arranged at the lower end of the other moving seat 13.

[0035] Among them, the material receiving and pressing telescopic assembly 42 includes a material receiving bracket 43, a material receiving servo electric cylinder 44 is connected to the material receiving bracket 43, and a material receiving rod 45 is provided at one end of the material receiving servo electric cylinder 44 near the opening 17, which shuttles axially through the inner side of the middle drive main shaft 2 and extends to the outer side of the middle drive main shaft 2; the material pushing and pressing moving assembly 41 includes a material pushing seat 46, a material pushing seat 46 is provided with a material pushing connection hole 47 on the side away from the moving seat 13, and a material pushing rod 48 is connected to one end of the material pushing seat 46 near the fixed seat 18, and one end of the material pushing rod 48 has a material pushing rod connecting portion 49 arranged in the material pushing connection hole 47, and both the material pushing rod 48 and the material receiving rod 45 are provided with an elastic pressing assembly 6. The material pushing rod 48 moves through the moving seat 13, and the material receiving rod 45 moves through the material receiving servo electric cylinder 44. The moving seat 13 and the material receiving servo electric cylinder 44 synchronously control the movement of the material pushing rod 48 and the material receiving rod 45, thereby improving stability.

[0036] Specifically, the elastic pressing assembly 6 includes an electric cylinder extension sleeve 61 disposed at the end of the material receiving rod 45 away from the material receiving servo electric cylinder 44. A pin portion 62 is provided at one end of the electric cylinder extension sleeve 61, which contacts the end of the crankshaft workpiece 15. A material receiving spring member 63 is provided between the electric cylinder extension sleeve 61 and the pin portion 62. Furthermore, a material pushing spring member 64 is provided in the material pushing seat 46, which contacts the material pushing rod connecting portion 49. The material receiving spring member 63 and the material pushing spring member 64 act as a buffer.

[0037] Combine Figure 2 and Figure 7 As shown, a mounting groove 71 is provided on the side of the mounting seat 11 away from the mounting surface 12, and a spindle motor 72 is provided in the mounting groove 71. A belt channel 73 is provided radially through the mounting seat 11 at one end of the mounting groove 71 close to the output shaft of the spindle motor 72, and a hydraulic channel 74 is provided on one side of the belt channel 73. A transmission port 75 is provided on the end of the spindle mounting seat 121 close to the mounting surface 12, and a hydraulic port 76 is provided on one side of the transmission port 75. Both the transmission port 75 and the hydraulic port 76 are connected to the mounting cavity 16, the belt channel 73 is connected to the rotating part 21 through the transmission port 75, and the hydraulic channel 74 is connected to the hydraulic part 22 through the hydraulic port 76.

[0038] like Figure 3 As shown, the turret movable drive structure 3 includes a Z-axis drive groove 31 arranged at both ends of the mounting surface 12, and Z-axis guide rails 32 are respectively provided on both sides of the Z-axis drive groove 31, a Z-axis slide 33 is provided on the outside of the Z-axis drive groove 31, and a Z-axis screw drive assembly 34 connected to the Z-axis slide 33 is provided in the Z-axis drive groove 31, and a plurality of Z-axis sliders 35 connected to the Z-axis guide rail 32 are provided on one side of the Z-axis slide 33. An X-axis drive groove 36 is provided on the side of the Z-axis slide 33 away from the Z-axis slider 35, and X-axis guide rails 37 are respectively provided on both sides of the X-axis drive groove 36. The side of the moving seat 13 away from the servo turret 14 is connected to the X-axis guide rail 37 through an X-axis slider 38, and an X-axis screw drive assembly 39 connected to the moving seat 13 is provided in the X-axis drive groove 36. The two servo turrets 14 are provided with a turret disc 19 at the opposite end, and the turret disc 19 is provided with a plurality of machining tools 20.

[0039] like Figure 1 As shown, a chip groove 81 is provided on the side of the bed base 1 away from the mounting seat 11, a chip hole 82 is provided in the middle of the chip groove 81, the middle drive spindle 2 is located directly above the chip hole 82, and both ends of the chip hole 82 are provided with an oblique portion 83 inclined downward along the direction of the chip hole 82.

[0040] A method for machining both ends of an engine crankshaft, the method comprising the following steps:

[0041] S1. One end of the crankshaft workpiece 15 contacts the material receiving rod 45, and the other end contacts the push rod 48. The push rod 48 and the material receiving rod 45 press the crankshaft workpiece 15 tightly. At the same time, the crankshaft workpiece 15 is moved into the middle drive spindle 2 under the drive of the moving seat 13 and the material receiving servo cylinder 44.

[0042] S2. The crankshaft workpiece 15 is moved to the interior of the middle drive spindle 2 and the claw member 53 fixes the outer side of the crankshaft workpiece 15. At the same time, the end of the crankshaft workpiece 15 located inside the middle drive spindle 2 is fixed to the hydraulic chuck member 51. After the crankshaft workpiece 15 is fixed, the push rod 48 and the receiving rod 45 begin to reset.

[0043] S3. The two servo turrets 14 first perform inner hole processing on the center of the end of the crankshaft workpiece 15, then perform thread processing on the circumferential outer side of the end of the crankshaft workpiece 15, and then perform chamfer outer circle processing on the end of the crankshaft workpiece 15. The two servo turrets 14 perform processing synchronously.

[0044] The principle of this embodiment is:

[0045] The manipulator places the crankshaft workpiece 15 on the bed base 1, and the movable seat 13 with the pushing seat 46 moves toward the end of the crankshaft workpiece 15. At the same time, the pushing rod 45 on the material receiving servo cylinder 44 moves toward the other end of the crankshaft workpiece 15. The two ends of the crankshaft workpiece 15 are respectively tightened by the ejector pin 62 and the pushing rod 48. The movable seat 13 with the pushing seat 46 and the material receiving servo cylinder 44 begin to move synchronously controlled to send the crankshaft workpiece 15 into the middle drive spindle 2. The hydraulic chuck part 51 in the middle drive spindle 2 fixes the crankshaft workpiece 15 close to one end of the pushing rod 28, and the claw part 53 fixes the outside of the crankshaft workpiece 15. Then the ejector pin 62 and the pushing rod 48 release the workpiece, and then the turret movable drive structure 3 starts to run, controlling the two servo turrets 14 to synchronously process the two ends of the crankshaft workpiece 15, thereby improving the processing efficiency.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0047] Although this article uses more bed base 1, mounting seat 11, mounting surface 12, spindle mounting seat 121, moving seat 13, servo turret 14, crankshaft workpiece 15, mounting cavity 16, opening 17, fixed seat 18, turret disc 19, machining tool 20, mid-drive spindle 2, rotating part 21, hydraulic part 22, workpiece inlet 23, turret movable drive structure 3, Z-axis drive slot 31, Z-axis guide rail 32, Z-axis slide 33, Z-axis screw drive assembly 34, Z-axis slider 35, X-axis drive slot 36, X-axis guide rail 37, X-axis slider 38, X-axis screw drive assembly 39, feeding translation mechanism 4, pusher top pressure shift The terms "dynamic assembly 41, material receiving and pressing telescopic assembly 42, material receiving bracket 43, material receiving servo electric cylinder 44, material receiving rod 45, material pushing seat 46, material pushing connecting hole 47, material pushing rod 48, material pushing rod connecting portion 49, multiple clamping structure 5, hydraulic chuck member 51, chuck hole 52, claw member 53, elastic pressing assembly 6, electric cylinder extension sleeve 61, ejector portion 62, material receiving spring member 63, material pushing spring member 64, mounting groove 71, spindle motor 72, belt channel 73, hydraulic channel 74, transmission port 75, hydraulic port 76, chip drop groove 81, chip drop hole 82, oblique portion 83" and the like are used herein, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A system for processing both ends of an engine crankshaft, comprising a bed base (1), a mounting seat (11) is provided on one side of the upper end of the bed base (1), a mounting surface (12) is provided on one side of the mounting seat (11), a middle drive spindle (2) is provided in the middle of the mounting surface (12), a movable seat (13) is movably provided on both ends of one side of the mounting surface (12) and located on both sides of the middle drive spindle (2), a servo turret (14) is provided on the movable seat (13), a turret movable driving structure (3) is provided between the movable seat (13) and the mounting seat (11), which can move the movable seat (13) along the length direction of the mounting surface (12) so that the two movable seats (13) are close to or away from each other and can move the movable seat (13) along the width direction of the mounting surface (12), and is characterized in that: A feeding translation mechanism (4) is provided between the movable seats (13) for axially positioning the crankshaft workpiece (15) and capable of conveying the crankshaft workpiece (15) to the middle drive spindle (2) under the action of the turret movable driving structure (3), and a multiple clamping structure (5) is provided in the middle drive spindle (2) for clamping the crankshaft workpiece (15); A spindle mounting seat (121) is provided in the middle of the mounting surface (12), a mounting cavity (16) is provided on the inner side of the spindle mounting seat (121), an opening (17) communicating with the mounting cavity (16) is provided at one end of the spindle mounting seat (121), a fixing seat (18) is provided at one end of the spindle mounting seat (121) away from the opening (17), the middle drive spindle (2) is arranged in the mounting cavity (16), the middle drive spindle (2) has a rotating part (21), a hydraulic part (22) is provided at one end of the rotating part (21), the hydraulic part (22) is in contact with the fixing seat (18) at one end away from the rotating part (21), and a workpiece inlet (23) is provided on the inner side of the fixing seat (18); The feeding translation mechanism (4) includes a material pushing and pressing moving assembly (41) arranged at the lower end of a moving seat (13) near one end of a fixed seat (18) and a material receiving and pressing telescopic assembly (42) arranged at the lower end of another moving seat (13); The material receiving and pressing telescopic assembly (42) includes a material receiving bracket (43), a material receiving servo electric cylinder (44) is connected to the material receiving bracket (43), and the material receiving servo electric cylinder (44) is provided with a material receiving rod (45) axially running through the inner side of the middle drive main shaft (2) and extending to the outer side of the middle drive main shaft (2) at one end close to the opening (17); the material pushing and pressing moving assembly (41) includes a material pushing seat (46), a material pushing connecting hole (47) is provided on the side of the material pushing seat (46) away from the moving seat (13), a material pushing rod (48) is connected to the end of the material pushing seat (46) close to the fixed seat (18), and one end of the material pushing rod (48) has a material pushing rod connecting portion (49) arranged in the material pushing connecting hole (47), and an elastic pressing assembly (6) is provided on the material receiving rod (45); The elastic pressing assembly (6) includes an electric cylinder extension sleeve (61) arranged at one end of the material receiving rod (45) away from the material receiving servo electric cylinder (44), one end of the electric cylinder extension sleeve (61) is provided with a pin portion (62) in contact with the end of the crankshaft workpiece (15), a material receiving spring member (63) is provided between the electric cylinder extension sleeve (61) and the pin portion (62), and a material pushing spring member (64) in contact with the material pushing rod connecting portion (49) is provided in the material pushing seat (46). The multiple clamping structure (5) includes a hydraulic chuck member (51) arranged on the inner side of the hydraulic part (22) in the circumferential direction, the hydraulic chuck member (51) is provided with a chuck hole (52) on the inner side of the circumferential direction, the fixed seat (18) is provided with at least two claw members (53) on the circumferential direction at one end away from the spindle mounting seat (121), one end of the crankshaft workpiece (15) is arranged in the chuck hole (52), and the outer side of the crankshaft workpiece (15) is in contact with the claw member (53); The movable seat (13) with the pusher seat (46) moves toward the end of the crankshaft workpiece (15), and at the same time, the receiving rod (45) on the receiving servo electric cylinder (44) moves toward the other end of the crankshaft workpiece (15). One end of the crankshaft workpiece (15) contacts the receiving rod (45), and the other end contacts the pusher rod (48). The pusher rod (48) and the receiving rod (45) press the crankshaft workpiece (15) tightly. At the same time, the movable seat (13) and the receiving servo electric cylinder (44) are in contact. The crankshaft workpiece (15) is moved toward the interior of the middle drive spindle (2) by the electric cylinder (44); after the crankshaft workpiece (15) is moved to the interior of the middle drive spindle (2), the claw member (53) fixes the outside of the crankshaft workpiece (15), and at the same time, one end of the crankshaft workpiece (15) located inside the middle drive spindle (2) is fixed to the hydraulic chuck member (51). When the crankshaft workpiece (15) is fixed, the push rod (48) and the receiving rod (45) begin to reset. According to the above-mentioned method for machining both ends of an engine crankshaft in a system for machining both ends of an engine crankshaft, the method comprises the following steps: S1, one end of the crankshaft workpiece (15) contacts the receiving rod (45), and the other end contacts the push rod (48), the push rod (48) and the receiving rod (45) press the crankshaft workpiece (15) tightly, and at the same time, the crankshaft workpiece (15) is moved into the middle drive spindle (2) under the drive of the moving seat (13) and the receiving servo cylinder (44); S2, the crankshaft workpiece (15) is moved to the inside of the middle drive spindle (2) and the rear clamping claw (53) fixes the outside of the crankshaft workpiece (15), and at the same time, one end of the crankshaft workpiece (15) located inside the middle drive spindle (2) is fixed to the hydraulic chuck (51), and when the crankshaft workpiece (15) is fixed, the push rod (48) and the receiving rod (45) begin to reset; S3, the two servo turrets (14) respectively perform inner hole processing on the center of the end of the crankshaft workpiece (15), then perform thread processing on the circumferential outer side of the end of the crankshaft workpiece (15), and then perform chamfer outer circle processing on the end of the crankshaft workpiece (15), and the two servo turrets (14) perform processing synchronously.

2. The engine crankshaft two-end processing system according to claim 1, characterized in that: The mounting seat (11) is provided with a mounting groove (71) on the side away from the mounting surface (12), a spindle motor (72) is provided in the mounting groove (71), a belt channel (73) is provided at one end of the mounting groove (71) close to the output shaft of the spindle motor (72) and radially penetrates the mounting seat (11), and a hydraulic channel (74) is provided on one side of the belt channel (73), the spindle mounting seat (121) is provided with a transmission port (75) at one end close to the mounting surface (12), a hydraulic port (76) is provided on one side of the transmission port (75), the transmission port (75) and the hydraulic port (76) are both connected to the mounting cavity (16), the belt channel (73) is connected to the rotating part (21) through the transmission port (75), and the hydraulic channel (74) is connected to the hydraulic part (22) through the hydraulic port (76).

3. The engine crankshaft two-end processing system according to claim 1, characterized in that: The turret movable drive structure (3) includes a Z-axis drive groove (31) provided at both ends of the mounting surface (12), a Z-axis guide rail (32) is provided on both sides of the Z-axis drive groove (31), a Z-axis slide (33) is provided on the outside of the Z-axis drive groove (31), a Z-axis screw drive assembly (34) connected to the Z-axis slide (33) is provided in the Z-axis drive groove (31), a plurality of Z-axis sliders (35) connected to the Z-axis guide rail (32) are provided on one side of the Z-axis slide (33), and the Z-axis slide (33) is away from the Z-axis guide rail. An X-axis driving groove (36) is provided on one side of the Z-axis slider (35), and X-axis guide rails (37) are provided on both sides of the X-axis driving groove (36). The side of the movable seat (13) away from the servo turret (14) is connected to the X-axis guide rail (37) through the X-axis slider (38), and an X-axis screw drive assembly (39) connected to the movable seat (13) is provided in the X-axis driving groove (36). The two servo turrets (14) are provided with a turret disk (19) at one opposite end, and a plurality of processing tools (20) are provided on the turret disk (19).

4. The engine crankshaft two-end processing system according to claim 1, characterized in that: The bed base (1) is provided with a chip dropping groove (81) on the side away from the mounting seat (11), a chip dropping hole (82) is provided in the middle of the chip dropping groove (81), the middle drive spindle (2) is located directly above the chip dropping hole (82), and both ends of the chip dropping hole (82) are provided with oblique portions (83) arranged downwardly along the direction of the chip dropping hole (82).

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