High-efficiency processing line for automobile pistons and piston processing technology

Abstract

The invention discloses an efficient processing line for automobile pistons, including a first turning and drilling compound machine tool, a second turning and drilling compound machine tool, a compound boring machine and a compound lathe arranged in an arrangement. The first turning and drilling compound machine tool is used for processing the pin seat oil return hole, the ring segment straight oil hole, the rough and fine stopper, the rough turning of the first three ring grooves, and the rough turning of the outer circle skirt process of the piston. The second turning and drilling compound machine tool is used for the piston ring segment oblique oil hole or the ring segment straight oil hole, the rough and fine combustion chamber process, the compound boring machine is used for processing the rough boring hole, the snap ring groove, the inner and outer chamfers, and the fine boring process of the pin holes on both sides of the piston, and the compound lathe is used for processing the piston special-shaped outer circle and the fine turning of the first three ring grooves. The invention integrates more than a dozen processes on the production line formed by four devices, reduces equipment occupancy, reduces operators, reduces the time consumed by processing multiple clamping, coordinates the processing time between each process, saves time, reduces labor intensity, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and more specifically, to a high-efficiency processing line for automobile pistons and a high-efficiency piston processing process using the line. Background Art

[0002] The automobile piston is like the central part of the automobile engine, and it plays an extremely important role when the engine starts. The automobile piston is used to withstand gas pressure and drive the crankshaft to rotate through the piston pin. The top of the piston is also a part of the combustion chamber. Piston processing mainly includes the determination of processing benchmarks, cutting parameters, processing allowances and process arrangements, including drilling the oil return hole of the pin seat, rough and fine stoppers, rough outer circle of the skirt, rough processing of the first and third ring grooves, straight oil holes of the ring segment, inclined oil holes of the ring segment, turning the combustion chamber, turning the top surface, rough boring of pin holes, snap ring grooves, internal and external chamfers, fine boring, special-shaped outer circle processing, first and third ring grooves and fine processing, etc. More than a dozen processes, each step is carried out step by step by different equipment. Conventional processing requires 8 to 12 equipment to complete, with more processing equipment, complicated processes, long clamping and switching cycles each time, and long time-consuming for each process to be carried out separately, low production efficiency, and about 3-5 people are required for one production line, with high labor costs. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an efficient automobile piston processing line that solves the above-mentioned problems. Only four devices and four clampings are needed to complete more than a dozen processes. The number of workpiece clampings in the whole process is small, which takes less time. In addition, multiple processes are processed in a coordinated manner and interconnected, which saves processing time and improves production efficiency; reduces labor intensity, reduces staffing, saves labor costs, and only one person is needed for one production line.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The efficient processing line for automobile pistons includes the first turning and drilling compound machine tool, the second turning and drilling compound machine tool, the compound boring machine and the compound lathe. The first turning and drilling compound machine tool is used to process the piston pin seat oil return hole, rough and fine stopper, rough turning the first three ring grooves, and rough turning the outer skirt process. The second turning and drilling compound machine tool is used to process the piston ring segment oblique oil hole or ring segment straight oil hole, rough and fine combustion chamber process. The compound boring machine is used to process the rough boring holes, snap ring grooves, internal and external chamfers, and fine boring of the pin holes on both sides of the piston. The compound lathe is used to process the piston special-shaped outer circle and fine turning the first three ring grooves. Multiple processes are integrated on the production line formed by four devices, reducing equipment occupancy, operators, and time consumed in multiple clamping processes.

[0006] A further improved technical solution of the present invention is that the first turning and drilling compound machine tool comprises a first spindle box perpendicular to the horizontal plane, a vertical first Y-axis linear slide above the first spindle box and horizontal first Z1-axis linear slides and first Z2-axis linear slides on both sides thereof, a vertical first X1-axis linear slide is installed on the slider of the first Z1-axis linear slide, a vertical first X2-axis linear slide is installed on the slider of the first Z2-axis linear slide, a dual-axis drilling power head is installed on the bottom end of the slider of the first Y-axis linear slide, a tool holder and a rough groove tool are installed on the bottom end of the slider of the first X1-axis linear slide, a first servo turret is installed on the bottom end of the slider of the first X2-axis linear slide, and a stop tool or a rough external cylindrical tool is installed on the first servo turret;

[0007] The second turning and drilling compound machine tool comprises a second spindle box perpendicular to the horizontal plane, a second Z1-axis linear slide and a second Z2-axis linear slide set horizontally on the left and right sides of the second spindle box, a second X1-axis linear slide vertically mounted on the slider of the second Z1-axis linear slide, a second X2-axis linear slide vertically mounted on the slider of the second Z2-axis linear slide, a second drilling power head mounted on the bottom end of the slider of the second X1-axis linear slide, a second servo turret mounted on the bottom end of the slider of the second X2-axis linear slide, and a combustion chamber turning tool mounted on the second servo turret;

[0008] The compound boring machine includes a third Z-axis linear slide which is horizontally arranged on the machine platform and moves horizontally to the left and right, a third stop table is installed on the slider of the third Z-axis linear slide, a clamping cylinder is provided directly above the third stop table, and a clamping top is installed at the bottom end of the telescopic rod of the clamping cylinder; a third Y-axis spindle and a third X-axis spindle are respectively installed on the machine platform on the left and right sides of the third Z-axis linear slide, a spreading cutter head is installed at the front end of the third Y-axis spindle, and a spreading cutter head driving motor is installed at the rear end, a retaining ring groove cutter, a rough boring cutter and an inner and outer chamfering cutter are installed at the front end of the spreading cutter head, and the third Y-axis spindle is driven and connected to the third Y-axis transmission motor; an elastic deformation boring head is installed at the front end of the third X-axis spindle, and an elastic deformation boring head driving motor is installed at the rear end, a fine boring cutter is installed at the front end of the elastic deformation boring head, and the third X-axis spindle is driven and connected to the third X-axis transmission motor;

[0009] The compound machine tool includes a fourth spindle box perpendicular to the horizontal plane, a vertical tailstock slide above the fourth spindle box and horizontal fourth Z1-axis linear slides and fourth Z2-axis linear slides on both sides thereof; a vertical fourth X1-axis linear slide is installed on the slider of the fourth Z1-axis linear slide, a vertical fourth X2-axis linear slide is installed on the slider of the fourth Z2-axis linear slide, a rotary top plate is installed on the bottom end of the slider of the tailstock slide, a linear motor is installed on the bottom end of the slider of the fourth X1-axis linear slide, a fine external cylindrical cutter is installed on the linear motor, a fourth servo turret is installed on the bottom end of the slider of the fourth X2-axis linear slide, and a tool holder and a fine groove cutter are installed on the fourth servo turret.

[0010] A further improved technical solution of the present invention is that a side drilling power head is further installed above the tool holder at the upper end of the slider of the first X1-axis linear slide. If the piston has both straight oil holes and inclined oil holes in the ring section, the first turning and drilling compound machine first processes the straight oil holes in the ring section, and the second turning and drilling compound machine processes the inclined oil holes in the ring section; if there are only straight oil holes in the ring section, they can be processed on the first turning and drilling compound machine or the second turning and drilling compound machine; if there are only inclined oil holes in the ring section, they are processed on the second turning and drilling compound machine.

[0011] A further improved technical solution of the present invention is that the first main spindle box includes a first main spindle, a chuck and a first rotary cylinder. The chuck is installed at the top end of the first main spindle, and the first rotary cylinder is installed at the bottom end of the first main spindle. The first rotary cylinder is connected to the chuck; the second main spindle box includes a second main spindle, a second stop platform and a second rotary cylinder. The second stop platform is installed at the top end of the second main spindle, and the second rotary cylinder is installed at the bottom end of the second main spindle. The second rotary cylinder is connected to the second stop platform; the fourth main spindle box respectively includes a fourth main spindle, a fourth stop platform and a fourth rotary cylinder. The fourth stop platform is installed at the top end of the fourth main spindle, and the fourth rotary cylinder is installed at the bottom end of the fourth main spindle. The fourth rotary cylinder is connected to the fourth stop platform. Clamping the piston with the chuck or the stop platform is convenient and simple.

[0012] A further improved technical solution of the present invention is that the first turning and drilling compound machine, the second turning and drilling compound machine, the compound boring machine and the compound lathe are arranged in a "one"-shaped row end to end. Arranged in a row, the products are transferred from the front-end blank to the final finished product packing, with orderly transfer, and the blanks and finished products before and after processing are stored separately.

[0013] A further improved technical solution of the present invention is that the first turning and drilling compound machine, the second turning and drilling compound machine, the compound boring machine and the compound lathe are arranged in a "field"-shaped grid end to end. The production line occupies a small area, the operators do not need to move long distances, and the blanks and finished products are at the same end, which is convenient for transportation.

[0014] The present invention also provides an efficient flow processing technology for automotive pistons.

[0015] 1) Clamp the top of the piston blank on the first turning and drilling compound machine described in claim 1 to complete the processes of the oil return hole of the pin seat, the rough and fine stop, the rough machining of the first three-ring grooves, and the rough turning of the outer skirt of the piston;

[0016] 2) Clamp the piston workpiece with the stop on the second turning and drilling compound machine described in claim 1 to complete the processes of the inclined oil holes and / or straight oil holes in the piston ring section, the rough and fine combustion chamber, and the turning of the top surface;

[0017] 3) Clamp the piston workpiece with the stop on the compound boring machine described in claim 1 to complete the processes of rough boring the pin holes on both sides of the piston, the snap ring grooves, the internal and external chamfers, and the fine boring of the holes;

[0018] 4) The piston workpiece is clamped on the composite lathe according to claim 1 by using the stopper to complete the finishing process of the piston's special-shaped outer circle and the first three-ring groove.

[0019] A further improved technical solution of the present invention is to clamp the top of the piston blank on the first turning and drilling compound machine tool described in claim 2 to complete the piston pin seat oil return hole, ring segment straight oil hole, rough and fine stop, first three ring groove rough machining, and rough turning of the outer skirt process.

[0020] A further improved technical solution of the present invention is that in step 1), the rough machining of the first three-ring groove simultaneously processes the rough and fine stop and the rough turning of the outer skirt.

[0021] The further improved technical solution of the present invention is that in step 3), the rough boring, snap ring groove, inner and outer chamfering of the pin holes on both sides of the piston are completed continuously and synchronously. The multi-process processing time is nested, which reduces the total processing time.

[0022] Beneficial effects of the present invention:

[0023] The present invention integrates more than a dozen piston processing procedures with four devices, reducing the process clamping time; the processing time of each process is well matched and does not interfere with each other, and some processes can be carried out simultaneously to reduce the processing time; the traditional piston production line requires 8 to 12 devices to complete, with many processing equipment, complicated processes, occupying space and equipment funds, and one production line requires about 3-5 people, with high labor costs. The present invention has greatly shortened the piston processing time through integration, reduced the investment in equipment funds and personnel costs, improved production efficiency, and reduced costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the production line of the present invention arranged in a field shape;

[0025] Figure 2 Schematic diagram of the structure of the first turning and drilling compound machine tool;

[0026] Figure 3 This is a schematic diagram of the structure of the second turning and drilling compound machine tool;

[0027] Figure 4 It is a schematic diagram of the structure of a compound boring machine;

[0028] Figure 5 It is a schematic diagram of the structure of a compound lathe;

[0029] Figure 6 Schematic diagram of the piston structure. DETAILED DESCRIPTION

[0030] like Figure 1As shown, the present invention includes a first turning and drilling compound machine tool 1, a second turning and drilling compound machine tool 2, a compound boring machine 3 and a compound lathe 4, wherein the first turning and drilling compound machine tool 1 is used for processing the pin seat oil return hole, rough and fine stop, rough turning of the first three ring grooves, and rough turning of the outer skirt of the piston, the second turning and drilling compound machine tool 2 is used for the piston ring segment oblique oil hole or ring segment straight oil hole, and the rough and fine combustion chamber process, the compound boring machine 3 is used for processing the rough boring holes, retaining ring grooves, internal and external chamfers, and fine boring of the pin holes on both sides of the piston, and the compound lathe 4 is used for processing the piston special-shaped outer circle and the fine turning of the first three ring grooves.

[0031] like Figure 2 As shown, the first turning and drilling compound machine tool 1 includes a first spindle box 11 perpendicular to the horizontal plane, a vertical first Y-axis linear slide 12 above the first spindle box 11 and horizontal first Z1-axis linear slides 13 and a first Z2-axis linear slide 14 on both sides thereof, a vertical first X1-axis linear slide 15 is installed on the slider of the first Z1-axis linear slide 13, a vertical first X2-axis linear slide 16 is installed on the slider of the first Z2-axis linear slide 14, a dual-axis drilling power head 17 is installed on the bottom end of the slider of the first Y-axis linear slide 12, a tool holder and a rough groove tool 18 and a side drilling power head 10 are installed on the bottom end of the slider of the first X1-axis linear slide 15, a first servo turret 19 is installed on the bottom end of the slider of the first X2-axis linear slide 16, and a stop tool or a rough external cylindrical tool is installed on the first servo turret 19. The first spindle box 11 includes a first spindle 111 , a hydraulic-pneumatic chuck 112 and a hydraulic-pneumatic first rotary cylinder 113 . The chuck 112 is mounted on the top of the first spindle 111 , and the first rotary cylinder 113 is mounted on the bottom of the first spindle 111 . The first rotary cylinder 113 pulls the chuck 112 .

[0032] The first turning and drilling compound machine tool 1 working process: Piston processing procedures such as Figure 6As shown, the operator clamps the piston 8 blank on the chuck 112, starts to tighten the first rotary cylinder 113 to control the power supply to tighten the piston blank. After installation, the system power is started, and the first Y-axis linear slide 12 is driven to work through system control, and the pin seat return oil hole 81 is punched on the blank downward. After completion, the first Y-axis linear slide 12 is reset; the first Z1-axis linear slide 13 is controlled to move horizontally toward the middle first spindle box 11, and the first X1-axis linear slide 15 moves downward to adjust the appropriate position to align with the piston ring segment straight oil hole 82. The first spindle is positioned and the spindle is positioned through the servo The motor is freely indexed, and the side drilling power head 10 drills the piston ring segment oil hole 82. After completion, the first X1 axis linear slide 15 and the first Z1 axis linear slide 13 are reset; the system controls the first spindle to rotate, and synchronously drives the first X1 axis linear slide 15, the first Z1 axis linear slide 13 and the first X2 axis linear slide 16, the first Z2 axis linear slide 14 to approach the intermediate piston blank, and the groove cutter 18 rough-machines the first and third ring grooves 83, and the synchronous stop cutter and the external circle cutter successively change the rough stop 84 and the rough turning of the outer circle skirt 85. Because the processes do not interfere with each other, the processing is completed at the same time. The original processing time required for the pin seat oil return hole and the ring segment straight oil hole was 10 seconds and 20 seconds respectively, and the time required for rough turning the first and third ring grooves, rough and fine stop, and rough outer circle of the skirt was 20 seconds respectively. The time for clamping the workpiece without multiple steps is 1.5 minutes. The time required for one clamping using the device is 50 seconds for the total of 5 processes.

[0033] like Figure 3 As shown, the second turning and drilling compound machine tool 2 includes a second spindle box 21 perpendicular to the horizontal plane, a horizontal second Z1-axis linear slide 23 and a second Z2-axis linear slide 24 set up on the left and right sides of the second spindle box 21, a vertical second X1-axis linear slide 25 is installed on the slider of the second Z1-axis linear slide, a vertical second X2-axis linear slide 26 is installed on the slider of the second Z2-axis linear slide 24, a second drilling power head 20 is installed on the bottom end of the slider of the second X1-axis linear slide 25 for processing the oil holes of the piston ring segment, the second drilling power head is installed at an inclined angle to process the inclined oil holes 87 of the ring segment, and is installed horizontally to process the straight oil holes 82 of the ring segment, a second servo turret 29 is installed on the bottom end of the slider of the second X2-axis linear slide 26, and a combustion chamber turning tool is installed on the second servo turret 29 for processing the piston combustion chamber. The second spindle box 21 includes a second spindle 211 , a second stop table 212 and a hydraulic pneumatic second rotary cylinder 213 . The second stop table 212 is installed at the top end of the second spindle 211 , and the second rotary cylinder 213 is installed at the bottom end of the second spindle 211 . The second rotary cylinder 213 is connected to the second stop table 212 .

[0034] The second turning and drilling compound machine tool working process: Piston processing procedures such as Figure 6As shown, the operator positions the piston 8 with the processed stop on the second stop platform 212 of the second spindle box using the piston stop 84, starts to tighten the second rotary cylinder 213 to control the power supply to tighten the piston, and starts the system power after installation. Through system control, the second Z1-axis linear slide 13 is controlled to move horizontally toward the middle second spindle box 21, and the second X1-axis linear slide 25 moves downward to adjust the appropriate position to align with the oil hole position of the piston ring segment. The second spindle 211 is positioned and the spindle is freely indexed by the servo motor, and the drilling power head 20 drills the oblique oil hole 80 or the straight oil hole 82 of the piston ring segment (if the piston ring segment only has straight oil holes, it can be processed on the first turning and drilling compound machine tool, or it can be processed on the second turning and drilling compound machine tool; as shown in FIG. If only the oblique oil hole is to be drilled, it is processed on the second turning and drilling compound machine tool; if both straight oil holes and oblique oil holes are to be drilled, the straight oil holes are drilled on the first turning and drilling compound machine tool, and the oblique oil holes are processed on the second turning and drilling compound machine tool). After completion, the second X1 axis linear slide 25 and the second Z1 axis linear slide 23 are reset; then the system controls the second spindle to rotate, drives the second X2 axis linear slide 26 and the second Z2 axis linear slide 24 to approach the middle piston, and the combustion chamber turning tool starts to process the piston combustion chamber 86. After the processing is completed, the second X2 axis linear slide 26 and the second Z2 axis linear slide 24 return to the starting state, the second spindle stops rotating, loosens and tightens the second rotary cylinder, removes the piston, and the ring segment oil hole and the top combustion chamber are processed. One clamping completes two processes.

[0035] like Figure 4 As shown, the compound boring machine includes a third Z-axis linear slide 311 horizontally arranged on the machine table 3 and movable horizontally to the left and right, a third stop table 32 is installed on the slider of the third Z-axis linear slide 311, a clamping cylinder 33 is arranged just above the third stop table 32, and a clamping top 34 is installed at the bottom end of the telescopic rod of the clamping cylinder 33; a third Y-axis spindle 351 and a third X-axis spindle 361 are respectively installed on the machine tables on the left and right sides of the third Z-axis linear slide 31, and a spreading cutter head 352 is installed at the front end of the third Y-axis spindle 351 , a spreading cutter head driving motor 353 is installed at the rear end, a retaining ring groove cutter 354, a rough boring cutter 355 and an inner and outer chamfering cutter 356 are installed at the front end of the spreading cutter head 352, and the third Y-axis spindle 351 is driven and connected to the third Y-axis transmission motor 357; an elastic deformation boring head 362 is installed at the front end of the third X-axis spindle 361, and an elastic deformation boring head driving motor 363 is installed at the rear end, a fine boring cutter 364 is installed at the front end of the elastic deformation boring head 363, and the third X-axis spindle 361 is driven and connected to the third X-axis transmission motor 365.

[0036] Compound boring machine 3 working process: Piston processing procedures such as Figure 6As shown, the operator positions the piston 8 with the processed stop on the third stop platform 32 using the piston stop 84, starts the switch of the clamping cylinder 33 to make the clamp work, and the clamping top 34 presses the piston. Start the system power supply, and the third Y-axis transmission motor 357 rotates the third Y-axis spindle 351 through the belt; the system controls the third Z-axis drive motor 311 and the spreader head drive motor 353 to work, and the third Z-axis drive motor 311 controls the slider of the third Z-axis linear slide 31 to drive the piston 8 to move in the negative direction (left direction) of the third Z-axis linear slide, and the spreader head drive motor 353 drives the spreader head 352 to process the rough boring, internal and external chamfers 88, and retaining ring grooves 89 of the pin holes 87 on both sides of the piston. After the processing is completed, the spreader head drive electromechanical 353 and the third Z-axis drive motor 311 are used to return the spreader head and the third Z-axis linear slide to the starting position, and the third Y-axis transmission motor 357 controls the third Y-axis spindle 351 to stop; then the system controls the third X-axis transmission motor 365 The third X-axis spindle 361 is rotated by a belt, and the elastic deformation boring head drive motor 363 and the third Z-axis drive motor 311 are controlled to work at the same time. The third Z-axis drive motor 311 controls the slider of the third Z-axis linear slide 31 to drive the piston 8 to move in the negative direction (right direction) of the third Z-axis linear slide 31. The elastic deformation boring head drive motor 363 drives the elastic deformation boring head 362, so that the pin hole fine boring tool 364 processes the fine boring holes of the special-shaped pin holes 87 on both sides of the piston through the elastic deformation boring head 362. After the processing is completed, the system controls the elastic deformation boring head 362 and the third Z-axis linear slide 31 to return to the starting position, and the third X-axis spindle 361 stops; the clamping top 34 is released, the working piston is removed, and the processing process is completed. The entire process of the piston pin hole is completed by one clamping.

[0037] like Figure 5 As shown, the compound lathe 4 includes a fourth spindle box 41 perpendicular to the horizontal plane, a vertical tailstock slide 42 above the fourth spindle box 41 and horizontal fourth Z1-axis linear slides 43 and fourth Z2-axis linear slides 44 on both sides thereof, a vertical fourth X1-axis linear slide 45 is installed on the slider of the fourth Z1-axis linear slide 43, a vertical fourth X2-axis linear slide 46 is installed on the slider of the fourth Z2-axis linear slide 44, a rotary top plate 47 is installed on the bottom end of the slider of the tailstock slide 42, a linear motor 48 is installed on the bottom end of the slider of the fourth X1-axis linear slide 45, a fine external circular cutter 49 is installed on the linear motor 48, a fourth servo turret 416 is installed on the bottom end of the slider of the fourth X2-axis linear slide 46, and a tool holder and a fine groove cutter 417 are installed on the fourth servo turret 416. The fourth spindle box 41 includes a fourth spindle 411 , a fourth stop table 412 and a fourth rotary cylinder 413 . The fourth stop table 412 is installed at the top end of the fourth spindle 411 , and the fourth rotary cylinder 413 is installed at the bottom end of the fourth spindle 411 . The fourth rotary cylinder 413 is connected to the fourth stop table 412 .

[0038] Compound lathe 4 working process: Piston processing procedures such as Figure 6 As shown, the operator installs the piston 8 with the processed stop through the stop 84 on the fourth stop platform 412 of the fourth spindle box, positions it with a stop block, starts to tighten the fourth rotary cylinder 413, controls the power supply to tighten the piston, starts the system power supply, drives the tailstock slide 42 downward to make the rotary top plate 47 press against the top of the piston below The top of the combustion chamber, through system control, the fourth Z1-axis linear slide 43 is controlled to move horizontally close to the middle fourth spindle box 41, and the fourth X1-axis linear slide 45 moves downward to adjust the appropriate position to align with the outer cylindrical surface 85 of the piston; the synchronous fourth X2-axis linear slide 46 and the fourth Z2-axis linear slide 44 approach the middle piston blank, the system controls the fourth spindle 411 to rotate, the fine external cylindrical turning tool 417 rough-fines the piston's special-shaped outer cylindrical surface 85, and the fine groove tool fine-fines the piston's first three ring grooves 83, and the processes do not interfere with each other and are carried out simultaneously. The original two processes required two clampings and two processings. Rough and fine turning of the special-shaped outer circle required 35 seconds, and fine turning of the ring groove required 25 seconds. This invention integrates the two processes and performs them simultaneously, and the processing can be completed in only 35 seconds.

[0039] During the entire piston processing, multiple processes only require four clampings. Each device integrates multiple processing processes that do not interfere with each other. The processes are completed in conjunction with each other, and some processes can be carried out simultaneously, which greatly shortens the overall processing time and reduces the number of operators. Originally, 3-5 people were required, but now only 1 person is needed; and only 4 equipment are needed for the production line, occupying a small area.

[0040] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A highly efficient flow processing technology for automobile pistons, wherein the processing line comprises a first turning and drilling compound machine tool (1), a second turning and drilling compound machine tool (2), a compound boring machine (3) and a compound lathe (4), wherein the first turning and drilling compound machine tool (1) is used for processing the oil return hole of the pin seat, the rough and fine stopper, the rough turning of the first three ring grooves, and the rough turning of the outer skirt of the piston, the second turning and drilling compound machine tool (2) is used for processing the inclined oil hole or the straight oil hole of the ring segment of the piston, and the rough and fine combustion chamber process, the compound boring machine (3) is used for processing the rough boring of the pin holes on both sides of the piston, the retaining ring groove, the inner and outer chamfers, and the fine boring process, and the compound lathe (4) is used for processing the special-shaped outer circle of the piston and the fine turning of the first three ring grooves; The first turning and drilling compound machine tool comprises a first spindle box (11) perpendicular to a horizontal plane, a vertical first Y-axis linear slide (12) above the first spindle box and horizontal first Z1-axis linear slides (13) and first Z2-axis linear slides (14) on both sides thereof, a vertical first X1-axis linear slide (15) being installed on the slider of the first Z1-axis linear slide (13), a vertical first X2-axis linear slide (16) being installed on the slider of the first Z2-axis linear slide (14), a dual-axis drilling power head (17) being installed on the bottom end of the slider of the first Y-axis linear slide (12), a tool holder and a rough groove tool (18) being installed on the bottom end of the slider of the first X1-axis linear slide (15), a first servo turret (19) being installed on the bottom end of the slider of the first X2-axis linear slide (16), and a stop tool or a rough external circular tool being installed on the first servo turret (19); The second turning and drilling compound machine tool (2) comprises a second spindle box (21) perpendicular to a horizontal plane, a second Z1-axis linear slide (23) and a second Z2-axis linear slide (24) arranged horizontally on the left and right sides of the second spindle box (21), a second X1-axis linear slide (25) vertically mounted on the slider of the second Z1-axis linear slide (23), a second X2-axis linear slide (26) vertically mounted on the slider of the second Z2-axis linear slide (24), a second drilling power head (20) mounted on the bottom end of the slider of the second X1-axis linear slide (25), a second servo turret (29) mounted on the bottom end of the slider of the second X2-axis linear slide (26), and a combustion chamber turning tool mounted on the second servo turret (29); The compound boring machine (3) comprises a third Z-axis linear slide (31) which is horizontally arranged on the machine platform and moves horizontally to the left and right, a third stop platform (32) is installed on the slider of the third Z-axis linear slide, a clamping cylinder (33) is provided directly above the third stop platform (32), and a clamping top (34) is installed at the bottom end of the telescopic rod of the clamping cylinder (33); a third Y-axis spindle (351) and a third X-axis spindle (361) are respectively installed on the machine platform on the left and right sides of the third Z-axis linear slide (31), a spreading cutter head (352) is installed at the front end of the third Y-axis spindle (351), and a A spreading head driving motor (353); a retaining ring groove cutter (354), a rough boring cutter (355) and an inner and outer chamfering cutter (356) are installed at the front end of the spreading head (352); the third Y-axis spindle (351) is driven and connected to the third Y-axis transmission motor (357); an elastic deformation boring head (362) is installed at the front end of the third X-axis spindle (361); an elastic deformation boring head driving motor (363) is installed at the rear end; a fine boring cutter (364) is installed at the front end of the elastic deformation boring head (362); and the third X-axis spindle (361) is driven and connected to the third X-axis transmission motor (365); The composite lathe (4) comprises a fourth spindle box (41) perpendicular to a horizontal plane, a vertical tailstock slide (42) above the fourth spindle box and horizontal fourth Z1-axis linear slides (43) and fourth Z2-axis linear slides (44) on both sides thereof; a vertical fourth X1-axis linear slide (45) is installed on the slider of the fourth Z1-axis linear slide (43); a vertical fourth X2-axis linear slide (46) is installed on the slider of the fourth Z2-axis linear slide (44); a rotary top plate (47) is installed on the bottom end of the slider of the tailstock slide (42); a linear motor (48) is installed on the bottom end of the slider of the fourth X1-axis linear slide (45); a fine external circular cutter (49) is installed on the linear motor; a fourth servo turret (416) is installed on the bottom end of the slider of the fourth X2-axis linear slide (46); and a tool holder and a fine groove cutter (417) are installed on the fourth servo turret (416); A side drilling power head (10) is also installed above the tool holder at the upper bottom end of the slide block of the first X1-axis linear slide (15); The first main spindle box (11) includes a first main spindle (111), a chuck (112), and a first rotary cylinder (113). The chuck (112) is installed at the top end of the first main spindle (111), and the first rotary cylinder (113) is installed at the bottom end of the first main spindle (111). The first rotary cylinder (113) is connected to the chuck (112). The second main spindle box (21) includes a second main spindle (211), a second spigot (212), and a second rotary cylinder (213). The second spigot (212) is installed at the top end of the second main spindle (211), and the second rotary cylinder (213) is installed at the bottom end of the second main spindle (211). The second rotary cylinder (213) is connected to the second spigot (212). The fourth main spindle box includes a fourth main spindle (411), a fourth spigot (412), and a fourth rotary cylinder (413). The fourth spigot (412) is installed at the top end of the fourth main spindle (411), and the fourth rotary cylinder (413) is installed at the bottom end of the fourth main spindle (411). The fourth rotary cylinder (413) is connected to the fourth spigot (412). Features: The processing steps include 1) Clamp the top of the piston blank on the first turning and drilling compound machine tool to complete the processes of the pin boss oil return hole, rough and fine spigots, rough machining of the first three-ring groove, and rough turning of the outer skirt of the piston; 2) Clamp the piston workpiece on the second turning and drilling compound machine tool by using the spigot to complete the processes of the inclined oil hole and / or straight oil hole in the piston ring section, rough and fine combustion chambers, and turning of the top surface of the piston; 3) Clamp the piston workpiece on the compound boring machine by using the spigot to complete the processes of rough boring, snap ring groove, internal and external chamfers, and finish boring of the pin holes on both sides of the piston; 4) Clamp the piston workpiece on the compound lathe by using the spigot to complete the processes of the special-shaped outer circle of the piston and finish machining of the first three-ring groove.

2. The high-efficiency flow processing technology for automobile pistons according to claim 1 is characterized in that: The first turning and drilling compound machine tool, the second turning and drilling compound machine tool, the compound boring machine, and the compound lathe are arranged in a "one"-shaped layout end to end.

3. The high-efficiency flow processing technology for automobile pistons according to claim 1 is characterized in that: The first turning and drilling compound machine tool, the second turning and drilling compound machine tool, the compound boring machine, and the compound lathe are arranged in a "field"-shaped grid layout end to end.

4. The high-efficiency flow processing technology for automobile pistons according to claim 1 is characterized in that: Clamp the top of the piston blank on the first turning and drilling compound machine tool to complete the processes of the pin boss oil return hole, straight oil hole in the ring section, rough and fine spigots, rough machining of the first three-ring groove, and rough turning of the outer skirt of the piston.

5. The high-efficiency flow processing technology for automobile pistons according to claim 1 is characterized in that: In step 1), the rough machining of the first three-ring groove simultaneously processes the rough and fine spigots and the process of rough turning the outer skirt of the piston.

6. The high-efficiency flow processing technology for automobile pistons according to claim 1 is characterized in that: In step 3), the rough boring, snap ring groove, internal and external chamfers of the pin holes on both sides of the piston are completed continuously and synchronously.

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