A piston ring integral shaft clamping machine and method

Abstract

The present invention provides a piston ring whole shaft clamping machine, comprising a frame and a positioning device arranged on the frame for fixing a core shaft, and also comprising an axial vibration device, wherein the axial vibration device is arranged at the top of the frame on one side of the positioning device and is used for axially hammering the core shaft; a stretching spiral device, wherein the stretching spiral device is arranged at the top of the frame on the other side of the positioning device and is used for fixing the piston ring on the core shaft so that the ring bodies are tightly fitted; and a radial vibration device, wherein the radial vibration device is arranged at the top of the frame and is used for radially hammering the core shaft. When the stretching spiral device of the present invention fixes the piston ring to be processed on the core shaft, the axial vibration device hammers the piston ring axially from the core shaft, and the radial vibration device hammers the piston ring radially from the core shaft, thereby eliminating the gap between the piston ring bodies, so that the ring bodies are in a tightly fitted state, thereby avoiding adverse effects on subsequent surface processes.

Description

Technical Field

[0001] The present invention relates to the technical field of piston ring processing, and in particular to a piston ring whole-shaft clamping machine and method. Background Art

[0002] The piston ring is a metal ring that is embedded in the groove of the piston. It works together with the cylinder, piston, cylinder wall, etc. to seal the fuel gas. During the production process, the outer circle of the ring body needs to be electroplated and surface treated, and the piston ring needs to be clamped on the entire shaft to complete the process. The existing clamping machine is generally composed of a base, an annular inner sleeve, an annular outer sleeve, a clamping assembly and a drive device. When clamping the piston ring, it is necessary to clamp multiple piston rings together in sequence and use clamping parts, such as clamping nuts, to fix the piston rings relatively from one side or both sides of the core shaft. However, the existing clamping assembly has the following defects: Since the piston ring is fixed axially from the core shaft by the clamping parts, it is easy to cause the piston ring bodies close to the clamping parts to be tightly bonded, while the piston ring bodies away from the clamping parts are not fully bonded, which will have an adverse effect on the subsequent surface treatment process. Summary of the Invention

[0003] The present invention provides a piston ring whole-shaft clamping machine capable of effectively fixing piston rings to be processed on a core shaft so as to make the ring bodies fit tightly together, and a method for clamping piston rings on a core shaft by using the clamping machine.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A piston ring whole shaft clamping machine includes a frame and a positioning device arranged on the frame for fixing a core shaft, and further includes:

[0006] An axial vibration device, which is arranged on the top of the frame on one side of the positioning device and is used to axially hammer the core shaft;

[0007] A stretching screw device, which is arranged on the top of the frame on the other side of the positioning device and is used to fix the piston ring on the core shaft so that the ring bodies fit tightly together; and

[0008] A radial vibration device is arranged on the top of the frame and is used for radially hammering the core shaft.

[0009] Preferably, the core shaft includes a shaft body for sleeved on the piston ring to be processed and a clamping nut arranged at one end of the shaft body for fixing the piston ring, and the positioning device includes two upper clamping parts and lower clamping parts arranged opposite to each other for fixing the piston ring to be processed on the core shaft, the lower clamping part is fixed on the top of the frame, and the upper clamping part is fixed on the bottom end of the radial vibration device, and semicircular grooves that cooperate with the piston ring are formed on the upper clamping part and the lower clamping part.

[0010] Preferably, the axial vibration device includes a base plate, a fixed seat arranged on the top of the base plate, a movable cylinder arranged axially along the core shaft, a mounting plate arranged at the output end of the movable cylinder, an axial air hammer arranged on the mounting plate axially along the core shaft, and an axial hammer head arranged at the output end of the axial air hammer.

[0011] Preferably, the stretching screw device includes a base, a base plate arranged on the top of the base and capable of axial displacement along the core shaft, an intermediate vertical plate arranged on the top of the base plate, a pull rod assembly arranged on the intermediate vertical plate for tightening the core shaft, and a nut assembly coaxially arranged with the pull rod assembly for driving the clamping nut to axially displace along the core shaft to fix the piston ring.

[0012] Preferably, it further comprises a cylinder arranged on the top of the base for driving the displacement of the substrate and a linear guide rail arranged on the top of the bottom plate for realizing the displacement of the substrate, and the output end of the cylinder is connected to the substrate.

[0013] Preferably, the tie rod assembly includes a tie rod servo motor, a tie rod transmission shaft arranged at the output end of the tie rod servo motor and axially passing through the middle vertical plate along the core shaft, and a screw arranged at the end of the tie rod transmission shaft away from the tie rod servo motor.

[0014] Preferably, the pull rod assembly further comprises a hollow piston cylinder provided on the side wall of the middle vertical plate for driving the displacement of the transmission shaft, and a rear vertical plate provided on the top of the base plate for the transmission shaft to pass through.

[0015] Preferably, the nut assembly includes a front side vertical plate fixed on the top of the base plate, a nut servo motor fixed on the front side vertical plate, a nut transmission shaft arranged at the output end of the nut servo motor, and a nut clamping sleeve arranged at the output end of the nut transmission shaft.

[0016] Preferably, the radial vibration device includes a base fixed on the top of the frame, a radial hammer seat capable of vertical displacement along the base, and a radial air hammer fixed on the radial hammer seat, and the radial air hammer is arranged on the top of the upper clamping member. The radial vibration device also includes a left-side clamping device and a right-side clamping device respectively arranged on both sides of the base for laterally clamping the core shaft, and the left-side clamping device and the right-side clamping device both include a guide cylinder and a U-shaped clamping claw arranged at the output end of the guide cylinder.

[0017] A control method for a piston ring whole-shaft clamping machine, comprising the aforementioned piston ring whole-shaft clamping machine, comprises the following steps:

[0018] S10: placing the mandrel with the piston ring to be processed into the lower clamping piece of the positioning device, and the upper clamping piece contacts the lower clamping piece under the drive of the radial vibration device;

[0019] S20: The pull rod assembly of the stretching screw device moves to contact the core shaft and is tightened with the core shaft. At the same time, the nut assembly drives the clamping nut to fix the piston ring on the core shaft. While the piston ring is fixed by the nut assembly, the axial vibration device and the radial vibration device hammer the piston ring on the core shaft from the axial and radial directions respectively.

[0020] Preferably, step S20 specifically includes:

[0021] S21: The cylinder drives the base plate to move closer to the core shaft along the top of the base plate, so that the screw rod is matched with the thread groove at the end of the core shaft, and the nut clamping sleeve is matched with the clamping nut on the core shaft;

[0022] S22: The tie rod servo motor drives the screw to rotate via the tie rod drive shaft, and the nut servo motor drives the nut clamping sleeve to rotate via the nut drive shaft. When the hollow piston cylinder drives the screw to tighten the mandrel toward the tie rod servo motor, the nut clamping sleeve loosens the clamping nut. When the hollow piston cylinder drives the screw to push the mandrel toward the mandrel, the nut clamping sleeve tightens the clamping nut.

[0023] S23: When the piston ring on the core shaft is tightened by the screw and the clamping nut, the movable cylinder arranged along the axial direction of the core shaft drives the axial air hammer to move toward the core shaft, and makes the axial hammer head contact with the end of the core shaft. The axial air hammer drives the axial hammer head to hammer the core shaft back and forth. At the same time, the radial air hammer fits tightly with the upper clamping part and directly transmits the radial hammering force to the workpiece to achieve radial hammering.

[0024] It can be seen from the above technical solution that the present invention has the following beneficial effects: in the present invention, the stretching spiral device is approached to the core shaft, the base plate is used to drive the pull rod assembly close to the end of the core shaft, and the screw is brought into contact with the spiral groove on the core shaft. The screw and the core shaft are tightened under the drive of the pull rod servo motor to achieve tightening of the core shaft end. At the same time, the nut clamping sleeve on the nut assembly is in contact with the clamping nut, and the clamping nut is driven by the nut servo motor to drive the clamping nut to spirally displace on the core shaft to achieve fixation of the piston ring to be processed on the core shaft. While the stretching spiral device fixes the piston ring, the axial vibration device and the radial vibration device hammer the piston ring on the core shaft from the axial and radial directions of the core shaft respectively to eliminate the gap between the piston ring bodies, so that the ring bodies fit more closely. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of part A;

[0027] Figure 3 for Figure 1Schematic diagram of the structure of part B;

[0028] Figure 4 It is a structural diagram of the axial vibration device;

[0029] Figure 5 It is a structural schematic diagram of the stretching spiral device;

[0030] Figure 6 for Figure 5 Structural diagram from another side perspective;

[0031] Figure 7 It is a structural diagram of the connection between the clamping part and the core shaft.

[0032] In the figure: 10, frame; 20, core shaft; 30, positioning device; 310, clamping member; 40, axial vibration device; 410, bottom plate; 420, fixed seat; 430, moving cylinder; 440, mounting plate; 450, axial air hammer; 460, axial hammer head; 50, stretching screw device; 510, base; 520, base plate; 530, middle vertical plate; 540, pull rod assembly; 541, pull rod servo motor; 542, pull rod transmission shaft; 543, screw Rod; 544, hollow piston cylinder; 545, rear side vertical plate; 550, nut assembly; 551, front side vertical plate; 552, nut servo motor; 553, nut clamping sleeve; 560, cylinder; 570, linear guide; 580, compression spring; 590, telescopic buffer sleeve; 60, radial vibration device; 610, base; 620, radial hammer seat; 630, radial air hammer; 640, left side clamping device; 641, guide cylinder; 642, U-shaped clamp. DETAILED DESCRIPTION

[0033] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Reference Figure 1A piston ring whole shaft clamping machine includes a frame 10 and a positioning device 30 arranged on the frame for fixing the core shaft 20, and also includes an axial vibration device 40, a stretching spiral device 50 and a radial vibration device 60. The axial vibration device is arranged on the top of the frame and is located on one side of the positioning device, and is used to hammer the core shaft from the axial direction of the core shaft. The stretching spiral device is arranged on the top of the frame and is located on the other side of the positioning device, and is used to fix the piston ring to be processed on the core shaft so that the piston ring bodies fit tightly together. The radial vibration device is also arranged on the top of the frame and is located above the positioning device for radially hammering the core shaft. In this way, when the stretching spiral device fixes the piston ring to be processed on the core shaft, the axial vibration device hammers the piston ring from the axial direction of the core shaft, and the radial vibration device hammers the piston ring from the radial direction of the core shaft, which can eliminate the gap between the piston ring bodies, so that the ring bodies reach a state of tight fit, avoiding adverse effects on subsequent surface processes.

[0035] Reference Figure 7 As a preferred technical solution of the present invention, the core shaft 20 includes a shaft body and a clamping nut at one end of the shaft body for fixing the piston ring. The shaft body is used to sleeve the piston ring to be processed on its side wall. The clamping nut is arranged at one end of the shaft body for axially fixing the piston ring. The positioning device 30 includes two oppositely arranged upper clamping parts 310 and lower clamping parts 320. Semicircular grooves that cooperate with the piston ring are formed on the upper clamping parts and the lower clamping parts, which are used to fix the piston ring to be processed on the core shaft. Furthermore, the lower clamping part is fixed on the top of the frame, and the upper clamping part is fixed on the bottom end of the radial vibration device.

[0036] Reference Figure 4 As a preferred technical solution of the present invention, the axial vibration device 40 includes a base plate 410, a fixed seat 420, a mobile cylinder 430, a mounting plate 440, an axial air hammer 450 and an axial hammer head 460. The base plate is arranged on the top of the frame, the fixed seat is fixed on the top of the base plate, the mobile cylinder is arranged along the axial direction of the core shaft, the mounting plate is arranged at the output end of the mobile cylinder, the axial air hammer is arranged on the mounting plate along the axial direction of the core shaft, and the axial hammer head is arranged at the output end of the axial air hammer. In this way, in the actual working process, the mounting plate is driven to move toward the direction of the core shaft under the drive of the mobile cylinder, and the axial hammer head is brought into contact with the end of the core shaft. The axial air hammer drives the axial hammer head to hammer the core shaft back and forth, thereby eliminating the gap between the piston ring bodies from the axial direction of the core shaft, so that the ring bodies fit tightly.

[0037] Reference Figure 5 、 Figure 6As a preferred technical solution of the present invention, the stretching screw device 50 includes a base 510, a base plate 520, an intermediate vertical plate 530, a pull rod assembly 540 and a nut assembly 550. The base plate is fixed on the top of the frame, the base plate is arranged on the top of the base and can be displaced axially along the core shaft, the intermediate vertical plate is arranged on the top of the base plate, the pull rod assembly is arranged on the intermediate vertical plate for tightening the core shaft away from one end of the axial vibration device, the nut assembly and the pull rod assembly are coaxially arranged for driving the clamping nut to displace axially along the core shaft to fix the piston ring on the core shaft. Specifically, the pull rod assembly 540 includes a pull rod servo motor 541, a pull rod transmission shaft 542 and a screw 543. The pull rod transmission shaft is arranged at the output end of the pull rod servo motor and passes through the intermediate vertical plate. The screw is arranged at the end of the pull rod transmission shaft, that is, at the end of the pull rod transmission shaft away from the pull rod servo motor. Correspondingly, a pull rod is arranged at one end of the core shaft close to the stretching screw device. There is a thread groove that matches the screw, so that under the drive of the pull rod servo motor, the pull rod transmission shaft is driven to rotate, and when the substrate drives the screw of the pull rod assembly to contact the thread groove at the end of the core shaft, the axial tightening of the core shaft can be achieved. The nut assembly 550 includes a front side vertical plate 551, a nut servo motor 552, a nut transmission shaft and a nut clamping sleeve 553. The front side vertical plate is fixed on the top of the substrate and is arranged parallel to the middle vertical plate. The nut servo motor is fixed on the front side vertical plate. The nut transmission shaft is arranged at the output end of the nut servo motor. The nut clamping sleeve is arranged at the output end of the nut transmission shaft. The nut clamping sleeve can rotate under the drive of the nut transmission shaft, and the nut clamping sleeve is arranged on the outer wall of the screw. In this way, when the substrate drives the nut clamping sleeve to move to contact the clamping nut on the core shaft, it can drive the clamping sleeve to tighten the clamping nut under the drive of the nut servo motor, thereby fixing the piston ring on the core shaft.

[0038] Furthermore, when the substrate 520 drives the components thereon to move forward toward the core shaft, the nut assembly is close to the core shaft at one end of the nut clamping sleeve 553. When the nut clamping sleeve contacts the clamping nut at the end of the core shaft 20, the hexagonal nut in the nut clamping sleeve 553 and the clamping nut at the end of the core shaft cannot completely overlap. If they do not overlap, there will definitely be a collision. A compression spring 580 is also provided between the front side vertical plate 551 and the middle vertical plate 530. The two ends of the compression spring are respectively connected to the nut clamping sleeve 553 and the side wall of the middle vertical plate 530. The compression spring can protect the nut clamping sleeve 553 when the nut clamping sleeve contacts the core shaft 20, reduce the impact force, and ensure that the nut servo motor 552 is not subjected to excessive axial force when tightening and loosening the clamping nut. In addition, a sensor can be provided on the front side vertical plate 551. This sensor is used to detect whether the hexagonal nut in the nut clamping sleeve and the clamping nut overlap, and the action of the nut servo motor 552 is controlled based on the signal of the sensor.

[0039] Furthermore, the pull rod assembly 540 also includes a hollow piston cylinder 544 and a rear side vertical plate 545. The hollow piston cylinder is arranged on the side wall of the middle vertical plate to drive the displacement of the transmission shaft. The rear side vertical plate is arranged on the top of the base plate. Specifically, the rear side vertical plate is arranged in parallel with the middle vertical plate. In this way, the three vertical plates of the middle vertical plate, the front side vertical plate and the rear side vertical plate form a parallel distribution structure. One end of the pull rod transmission shaft passes through the rear side vertical plate and is connected to the pull rod servo motor. The other end of the pull rod transmission shaft is connected to the screw. The hollow piston cylinder is connected to the pull rod transmission shaft to relieve the axial force of the screw. The hollow piston cylinder is controlled by a proportional servo valve. The traction force can be fine-tuned in real time according to different working conditions. The hollow piston cylinder can drive the pull rod transmission shaft to telescope back and forth, thereby The screw and the core shaft can be tightened or loosened through repeated tightening and loosening processes, combined with the hammering action of the axial vibration device and the radial vibration device, to eliminate the gap between the piston ring bodies on the core shaft, so that the piston ring bodies fit more closely. It should be noted that when the piston ring is arranged, under the action of the hollow piston cylinder, when the screw tightens the core shaft toward the pull rod servo motor side, the nut clamping sleeve loosens the clamping nut, releasing the fixing effect of the clamping nut on the piston ring, and when the screw pushes the core shaft toward the core shaft side, the nut clamping sleeve tightens the clamping nut. In this way, in the process of tightening or loosening the screw on the core shaft, the clamping nut is used to loosen or clamp the piston ring, thereby further eliminating the gap between the piston ring bodies and making the piston ring fit more closely.

[0040] Furthermore, a telescopic buffer sleeve 590 is arranged between the hollow piston cylinder and the rear side vertical plate 545. The stroke of the telescopic buffer sleeve is longer than the stroke of the hollow piston cylinder. It is used to provide effective buffering protection for the axial force of the screw during the extension and retraction of the hollow piston cylinder and the tightening and loosening of the core shaft by the pull rod servo motor. Furthermore, a magnetic sensor is also provided on the top of the base plate 520. The magnetic sensor is used to measure the stroke of the hollow piston cylinder, so that not only can the pull rod servo motor stop according to the set soft stroke protection during the process of tightening the core shaft, but the pull rod servo motor can also quickly retreat and then slowly stop according to the set segmented stroke during the process of loosening the core shaft. This can more effectively reduce the axial force of the screw.

[0041] Furthermore, in order to realize the axial displacement of the substrate along the core shaft, a cylinder 560 and a linear guide 570 are arranged on the top of the base, and correspondingly, a slide rail matching the linear guide is arranged at the bottom of the substrate, and the output end of the cylinder is fixedly connected to the substrate. In this way, under the drive of the cylinder, the substrate is driven to move along the linear guide, thereby realizing the axial displacement of the substrate along the core shaft, so as to drive the pull rod assembly and nut assembly on the substrate to contact the core shaft, thereby facilitating the fixing of the piston ring to be processed on the core shaft through the aforementioned pull rod assembly and nut assembly.

[0042] Reference Figure 2As a preferred technical solution of the present invention, the radial vibration device 60 includes a base 610 fixed on the top of the frame, a radial hammer seat 620 and a radial air hammer 630. The radial hammer seat can be vertically displaced along the base. The radial air hammer is fixed on the radial hammer seat. The radial air hammer is arranged on the top of the upper clamping member. Specifically, a radial servo motor for driving the displacement of the radial hammer seat can be provided on the base, and a vertically distributed guide rail can be provided on the base. At the same time, a slider matching the guide rail can be provided on the radial hammer seat. The radial servo motor is used to drive the radial hammer seat to move along the guide rail to achieve vertical displacement of the radial hammer seat. In this way, in the process of fixing the piston ring on the core shaft, the radial servo motor drives the radial hammer seat and the upper clamping member and the lower clamping member thereon to move. The air hammer contacts the upper clamping piece, thereby fixing the core shaft with the piston ring. Since the radial air hammer fits tightly with the upper clamping piece, the radial hammering force will be directly transmitted to the workpiece. In this way, the piston rings can fit more closely together, so as to achieve the purpose of sorting the piston rings. Since the bottom ends of the core shaft and the piston ring thereon are arranged on the lower clamping piece at the top of the frame, when the upper clamping piece at the top contacts the lower clamping piece at the bottom under the action of the radial hammering seat, the piston ring can be fixed. At the same time, the nut clamping sleeve in the stretching screw device tightens the clamping nut to tighten the piston ring on the fixed core shaft. In addition, combined with the hammering action of the axial hammering head, the gap between the piston rings on the core shaft can be eliminated to achieve a closer fit between the piston ring bodies.

[0043] Reference Figure 3 Furthermore, the radial vibration device also includes a left-side clamping device 640 and a right-side clamping device placed on both sides of the base for laterally clamping the core shaft. Specifically, the left-side clamping device and the right-side clamping device have the same structure, both including a guide cylinder 641 fixed on the side wall of the base and a U-shaped clamping claw 642 arranged at the output end of the guide cylinder. In this way, the core shaft can be fixed from the end of the core shaft through the clamping devices on both sides. Specifically, in the process of fixing the piston ring, the left-side clamping device is used to fix the core shaft, and the stretching spiral device fixes the piston ring from the right side. At the same time, the axial vibration device and the radial vibration device hammer the piston ring axially and radially from the core shaft respectively. After the piston ring is fixed, the stretching spiral device retracts, and the right-side clamping device extends to the right end of the fixed core shaft to prevent the radial vibration device from driving the piston ring to move when it is detached from the core shaft, which has an adverse effect on the fixed piston ring.

[0044] When in use, the lower clamping part is fixed on the frame, and the upper clamping part is arranged at the bottom of the radial air hammer. The pre-installed core shaft is placed on the lower clamping part at the bottom, and the radial hammer seat on the radial vibration device drives the upper clamping part to move downward, and specifically makes the upper clamping part cooperate with the lower clamping part on the frame to fix the core shaft and the piston ring thereon, and then the left clamping device is extended, and the U-shaped clamping claw on it is used to fix the left end of the core shaft, and the stretching spiral device approaches the core shaft. Specifically, the base plate drives the pull rod assembly close to the end of the core shaft, and makes the screw contact with the spiral groove on the core shaft, and the screw and the core shaft are tightened under the drive of the pull rod servo motor. At the same time, the nut clamping sleeve on the nut assembly contacts with the clamping nut, and is tightened under the control of the nut servo motor. Driven by the machine, the clamping nut is driven to spirally displace on the core shaft. Specifically, when the screw tightens the core shaft in the direction of the pull rod servo motor, the nut clamping sleeve loosens the clamping nut. When the screw pushes the core shaft in the direction of the core shaft, the nut clamping sleeve tightens the clamping nut. In this reciprocating tightening and loosening process, the axial vibration device and the radial vibration device hammer the piston ring on the core shaft from the axial and radial directions of the core shaft respectively. Specifically, the axial air hammer drives the axial hammer head to hammer the core shaft reciprocatingly. Since the radial air hammer fits tightly with the upper clamping piece, the radial hammering force can be directly transmitted to the workpiece to realize radial hammering, so as to eliminate the gap between the piston ring bodies, so that the ring bodies fit more closely, thereby realizing the fixation of the piston ring to be processed on the core shaft.

[0045] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A control method for a piston ring full shaft clamping machine, the piston ring full shaft clamping machine comprising a frame (10) and a positioning device (30) arranged on the frame for fixing a core shaft (20), characterized in that: The piston ring whole shaft clamping machine also includes: An axial vibration device (40) is arranged on the top of a frame on one side of the positioning device and is used for axially hammering the core shaft. The axial vibration device (40) comprises a base plate (410), a fixing seat (420) arranged on the top of the base plate, a movable cylinder (430) arranged along the axial direction of the core shaft, a mounting plate (440) arranged at the output end of the movable cylinder, an axial air hammer (450) arranged on the mounting plate along the axial direction of the core shaft, and an axial hammering head (460) arranged at the output end of the axial air hammer. A stretching screw device (50) is arranged on the top of the frame on the other side of the positioning device, and is used to fix the piston ring on the core shaft so that the ring bodies are tightly fitted together. The stretching screw device (50) includes a base (510), a base plate (520) arranged on the top of the base and capable of axial displacement along the core shaft, an intermediate vertical plate (530) arranged on the top of the base plate, a pull rod assembly (540) arranged on the intermediate vertical plate for tightening the core shaft, and a nut assembly (550) coaxially arranged with the pull rod assembly for driving the clamping nut to axially displace along the core shaft to fix the piston ring. The pull rod assembly (540) includes a pull rod servo motor (541), a nut assembly (550) arranged on the pull rod, and a nut assembly (550) coaxially arranged with the pull rod assembly for driving the clamping nut to axially displace along the core shaft to fix the piston ring. A pull rod transmission shaft (542) is provided at the output end of the servo motor and passes through the middle vertical plate along the axial direction of the core shaft, and a screw (543) is provided at the end of the pull rod transmission shaft away from the pull rod servo motor, a hollow piston cylinder (544) is provided on the side wall of the middle vertical plate for driving the transmission shaft to move, and a rear vertical plate (545) is provided on the top of the base plate for the transmission shaft to pass through, and the nut assembly (550) includes a front vertical plate (551) fixed on the top of the base plate (520), a nut servo motor (552) fixed on the front vertical plate, a nut transmission shaft provided at the output end of the nut servo motor, and a nut clamping sleeve (553) provided at the output end of the nut transmission shaft; and A radial vibration device (60) is arranged on the top of the frame and is used for radially hammering the core shaft. The radial vibration device (60) includes a base (610) fixed on the top of the frame, a radial hammer seat (620) capable of vertical displacement along the base, and a radial air hammer (630) fixed on the radial hammer seat, wherein the radial air hammer is arranged on the top of the upper clamping member; The core shaft comprises a shaft body for sleeve-mounting a piston ring to be processed and a clamping nut arranged at one end of the shaft body for fixing the piston ring. The positioning device (30) comprises an upper clamping piece (310) and a lower clamping piece (320) arranged opposite to each other for fixing the piston ring to be processed on the core shaft. The control method of the piston ring whole shaft clamping machine includes the following steps: S10: placing the mandrel with the piston ring to be processed into the lower clamping piece of the positioning device, and the upper clamping piece contacts the lower clamping piece under the drive of the radial vibration device; S20: The pull rod assembly of the stretching screw device moves to contact the core shaft and is tightened with the core shaft. At the same time, the nut assembly drives the clamping nut to fix the piston ring on the core shaft. While the piston ring is fixed by the nut assembly, the axial vibration device and the radial vibration device hammer the piston ring on the core shaft from the axial and radial directions respectively. Step S20 specifically includes: S21: The cylinder drives the base plate to move closer to the core shaft along the top of the base plate, so that the screw rod is matched with the thread groove at the end of the core shaft, and the nut clamping sleeve is matched with the clamping nut on the core shaft; S22: The tie rod servo motor drives the screw to rotate via the tie rod drive shaft, and the nut servo motor drives the nut clamping sleeve to rotate via the nut drive shaft. When the hollow piston cylinder drives the screw to tighten the mandrel toward the tie rod servo motor, the nut clamping sleeve loosens the clamping nut. When the hollow piston cylinder drives the screw to push the mandrel toward the mandrel, the nut clamping sleeve tightens the clamping nut. S23: When the piston ring on the core shaft is tightened by the screw and the clamping nut, the movable cylinder arranged along the axial direction of the core shaft drives the axial air hammer to move toward the core shaft, and makes the axial hammer head contact with the end of the core shaft. The axial air hammer drives the axial hammer head to hammer the core shaft back and forth. At the same time, the radial air hammer fits tightly with the upper clamping part and directly transmits the radial hammering force to the workpiece to achieve radial hammering.

2. The control method according to claim 1, characterized in that: The lower clamping piece is fixed on the top of the frame, and the upper clamping piece is fixed on the bottom end of the radial vibration device. Semicircular grooves that match the piston ring are formed on both the upper clamping piece and the lower clamping piece.

3. The control method according to claim 1, wherein: The stretching screw device further comprises a cylinder (560) arranged on the top of the base for driving the displacement of the substrate and a linear guide rail (570) arranged on the top of the bottom plate for achieving the displacement of the substrate, and the output end of the cylinder is connected to the substrate.

4. The control method according to claim 1, wherein: The radial vibration device further comprises a left-side pressing device (640) and a right-side pressing device respectively disposed on both sides of the base for laterally pressing the core shaft, wherein the left-side pressing device and the right-side pressing device both comprise a guide cylinder (641) and a U-shaped clamping claw (642) disposed at the output end of the guide cylinder.

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