Rolling strengthening device for inner hole surface treatment and using method

Abstract

The invention provides a rolling strengthening device for inner hole surface treatment and a using method, the rolling strengthening device comprises a rolling device mounted on a tailstock of a machine tool, the rolling device and a workpiece fixed on a chuck of the machine tool are coaxially arranged, and at least one sliding supporting seat is arranged between the rolling device and a sliding rail of the machine tool; a fixing base moving in the radial direction is arranged at the end of the shell supporting assembly, and a rotating roller is arranged in the fixing base and abuts against the inner wall of the workpiece. A driving head is fixedly arranged at the end of the internal driving assembly, a plurality of wedge blocks are arranged on the outer side of one end of the driving head, a guide groove is formed in one side of each wedge block, an inclined groove is formed in the bottom of the fixing base, the fixing base abuts against the inclined faces of the wedge blocks through the inclined groove to slide, a through hole is formed in one side of the inclined groove, and a pin shaft is fixedly arranged in the through hole and abuts against the interior of the guide groove to slide. The rolling strengthening device not only can effectively improve the quality and mechanical performance of the surface of the inner hole of the workpiece, but also has the advantages of being high in precision, automatic, flexible, easy to maintain and the like, and is suitable for various precision machining occasions.

Description

Technical Field

[0001] The invention relates to the field of inner hole surface treatment, and in particular to a rolling strengthening device for inner hole surface treatment and a use method thereof. Background Art

[0002] Strengthening the inner wall of the inner hole is an important process to improve the surface hardness, fatigue strength and corrosion resistance of the inner wall of the workpiece. It is widely used in aerospace, automobile manufacturing, mechanical processing and other fields. At present, the commonly used methods for strengthening the inner wall of the inner hole include rolling strengthening, shot peening strengthening, laser shock strengthening, ultrasonic shock strengthening, carburizing and nitriding, induction quenching, electroplating and spraying. However, the common problem of these methods in practical applications is low processing efficiency. Especially when dealing with workpieces with complex shapes and long inner holes, the existing strengthening methods often require a lot of time and manpower, which is difficult to meet the needs of modern manufacturing industry for efficient and automated production. Summary of the invention

[0003] The main purpose of the present invention is to provide a rolling strengthening device and a method for using the inner hole surface treatment to solve the problems in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: comprising a rolling device installed on the tailstock of a machine tool, the rolling device and the workpiece fixed on the chuck of the machine tool are coaxially arranged, and at least one sliding support seat is provided between the rolling device and the slide rail of the machine tool; The rolling device includes a shell support component and an internal drive component. The internal drive component is located in the shell and reciprocates in the component. A radially movable fixed seat is provided at the end of the shell support component. A rotating roller is provided in the fixed seat, and the roller abuts against the inner wall of the workpiece. A driving head is fixedly provided at the end of the internal driving component, and multiple wedge blocks are provided on the outer side of one end of the driving head. A guide groove is provided on one side of the wedge block, and an inclined groove is provided at the bottom of the fixed seat. The fixed seat slides on the inclined surface of the wedge block through the inclined groove. A through hole is provided on one side of the inclined groove, and a pin shaft is fixed in the through hole. The pin shaft slides against the guide groove.

[0005] Preferably, the housing support assembly comprises a cylinder, a connecting cylinder, an extension cylinder and a fixed cylinder, a rolling cylinder is fixedly arranged at the end of the fixed cylinder, a plurality of slots are arranged on the outer side of the rolling cylinder, and the fixed seat is located in the slot and moves; A base is fixed at the tail of the cylinder barrel, and the end of the base is coaxially fixedly connected with the tailstock of the machine tool through a flange and bolts.

[0006] Preferably, both ends of the cylinder are connected to the base and the connecting tube respectively through flanges and bolts; The peripheral sides of the connecting tube and the extension tube are provided with a plurality of corresponding connecting holes; The circumference of the rolling cylinder and the fixing cylinder is provided with a plurality of corresponding connecting holes; A pin is fixed in the connecting hole, and the pin is used to connect the two.

[0007] Preferably, the extension tube and the fixed tube are connected by a rectangular thread, and oil inlets are provided at both ends of the outer side of the cylinder tube.

[0008] Preferably, the internal drive assembly comprises a core shaft, one end of which is fixedly connected to the drive head, and the other end of which is provided with a piston body, which is fixed to the end of the core shaft by a locking nut; The piston body is located in a cylinder barrel in the shell support assembly and slides in a sealed manner. A sealing member is arranged between the connecting barrel and the core shaft in the shell support assembly.

[0009] Preferably, an end cover is fixedly provided at the end of the rolling cylinder, a groove is provided inside the end cover, and the end of the driving head is located in the groove.

[0010] Preferably, a fixed plate is fixed at the tail of the machine tool, a motor is fixed on one side of the fixed plate, a rotating screw is provided between the machine slide rails on both sides of the machine tool, one end of the screw is fixedly connected to the output shaft of the motor, and the other end rests on the machine tool through a bearing seat, and the bottom of the tailstock of the machine tool is threadedly connected to the screw through a threaded sleeve.

[0011] Preferably, a hydraulic station is further provided, and the hydraulic station is connected to the oil ports at both ends of the cylinder in the housing support assembly through a control valve and an oil pipe.

[0012] Preferably, a groove is provided on the top of the fixing seat, pin holes are provided on both sides of the groove, the roller is arranged in the groove, and a pin shaft passes through the roller and rests against the pin hole. A wire hole is provided on one side of the pin hole, and a threaded top screw is provided in the wire hole, and the end of the top screw rests on the pin shaft.

[0013] The method for using the rolling strengthening device for inner hole surface treatment is as follows: S1. The workpiece is fixedly mounted on the chuck of the machine tool, the tail of the rolling device is fixed to the tailstock of the machine tool by bolts, and a plurality of sliding support seats are set up in the middle of the rolling device to ensure that the workpiece, the rolling device and the sliding support seat are coaxially arranged; S2, the piston body and the core shaft are driven forward by the hydraulic station to move the driving head in the rolling cylinder at the end forward, thereby driving the fixed seat to move radially, so that the roller abuts against the inner wall of the workpiece; S3, driving the machine tool chuck to rotate, and synchronously driving the machine tool tailstock to move through the motor and the screw rod, so that the rolling device moves and feeds, so that the roller abuts against the inner wall of the workpiece to roll and move.

[0014] The present invention provides a rolling strengthening device for inner hole surface treatment and a method for using the same, with the following beneficial effects: 1. By continuously rolling and pressing the inner wall of the workpiece with a roller, the roughness of the inner hole surface of the workpiece can be significantly improved, making it smoother and flatter. The cold work hardening effect during the rolling process can increase the surface hardness and enhance wear resistance.

[0015] 2. The plastic deformation produced during the rolling process produces residual compressive stress on the surface of the material, which improves the fatigue strength and durability of the workpiece. Through rolling strengthening, microcracks and other defects on the surface of the inner hole of the workpiece can be reduced or eliminated, thereby improving the overall mechanical properties.

[0016] 3. The hydraulic drive system can accurately adjust the moving speed and force of the piston body through the control valve to ensure the stability and consistency of the rolling process. The combination of the screw and the motor realizes the precise feeding of the tailstock of the machine tool and ensures the relative position accuracy between the rolling device and the workpiece.

[0017] 4. The entire device can be controlled by a CNC system to achieve automated operation, reduce manual intervention, and improve production efficiency. The integrated design of hydraulic stations, motors, control valves and other components makes the operation of the entire system easier and more reliable.

[0018] 4. By adjusting the rectangular threaded connection between the extension tube and the fixed tube, the length of the rolling device can be easily changed to adapt to workpieces of different sizes. By replacing different rollers, it can meet the surface treatment requirements of inner holes of different shapes and materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a front sectional view of the tailstock driving structure of the machine tool of the present invention; Figure 3 is a front cross-sectional view of the rolling device of the present invention; Figure 4 The present invention Figure 3 Middle AA section view; Figure 5 This is a side view of the fixing seat axis of the present invention; Figure 6 The present invention Figure 5 A front cross-sectional view of Figure 7 is a side view of the drive head shaft of the present invention; Figure 8 The present invention Figure 7 Side view of In the figure: machine tool 1; machine tool slide rail 2; machine tool tailstock 3; fixed plate 4; motor 5; sliding support seat 6; rolling device 7; base 701; cylinder 702; connecting cylinder 703; extension cylinder 704; fixing cylinder 705; rolling cylinder 706; end cover 707; driving head 708; wedge block 7081; guide groove 7082; fixing seat 709; inclined groove 7091; through hole 7092; groove 7093; pin hole 7094; piston body 710; locking nut 711; pin shaft 712; roller 713; core shaft 714; workpiece 8; machine tool chuck 9; screw rod 10; screw sleeve 11. DETAILED DESCRIPTION

[0020] Example 1 like Figures 1 to 8 As shown, the rolling strengthening device for inner hole surface treatment includes a rolling device 7 installed on the tailstock 3 of the machine tool, the rolling device 7 is coaxially arranged with a workpiece 8 fixed on the machine tool chuck 9, and at least one sliding support seat 6 is provided between the rolling device 7 and the machine tool slide rail 2; The rolling device 7 includes a shell support component and an internal drive component. The internal drive component is located in the shell and reciprocates in the component. A radially movable fixed seat 709 is provided at the end of the shell support component. A rotating roller 713 is provided in the fixed seat 709. The roller 713 abuts against the inner wall of the workpiece 8. A driving head 708 is fixedly provided at the end of the internal driving component, and a plurality of wedge blocks 7081 are provided on the outer side of one end of the driving head 708. A guide groove 7082 is provided on one side of the wedge block 7081. An inclined groove 7091 is provided at the bottom of the fixed seat 709. The fixed seat 709 slides on the inclined surface of the wedge block 7081 through the inclined groove 7091. A through hole 7092 is provided on one side of the inclined groove 7091. A pin shaft is fixed in the through hole 7092, and the pin shaft slides against the guide groove 7082.

[0021] The workpiece 8 is mounted on the machine tool chuck 9, and the rolling device 7 is mounted on the machine tool tailstock 3. The rolling device 7 is also connected to the machine tool slide rail 2 through a plurality of sliding support seats 6 so that the rolling device 7 is coaxially arranged with the workpiece 8. The driving head 708 is driven to move by the internal driving assembly, and then the inclined surface of the wedge block 7081 cooperates with the inclined groove 7091 at the bottom of the fixed seat 709, and the outer groove of the rolling cylinder 706 is limited, so that the fixed seat 709 moves radially, driving the roller 713 to rest against the inner wall of the workpiece 8. The inner wall of the workpiece 8 can be rolled and strengthened by driving the workpiece 8 to rotate and the rolling device 7 to feed through the machine tool 1.

[0022] The details of the rolling device include an outer shell support assembly and an internal drive assembly. The internal drive assembly is able to move inside the outer shell. A radially movable fixed seat is provided at one end of the outer shell support assembly, and a rotating roller is installed in the fixed seat. These rollers directly contact and act on the inner wall of the workpiece. There is a drive head at the end of the drive assembly, and multiple sets of wedges are arranged on the drive head, and guide grooves are designed next to each wedge. An inclined groove is correspondingly arranged at the bottom of the fixed seat, and radial movement is achieved by cooperating with the wedges on the drive head. A through hole is also provided on one side of the inclined groove, in which a pin is installed. This pin can slide in the guide groove, further ensuring the accuracy of the action.

[0023] When the inner wall of the workpiece needs to be processed, first install the workpiece on the machine tool chuck and ensure that the rolling device is correctly installed on the tailstock of the machine tool and the two are coaxial. Next, start the internal drive assembly to push the drive head forward. At this time, due to the bevel fit between the wedge block and the fixed seat, and the restriction on the outside of the rolling cylinder, the fixed seat is forced to expand radially outward. During the expansion process, the roller located in the fixed seat will be close to the inner wall of the workpiece; at the same time, as the machine tool drives the workpiece to rotate and the rolling device itself feeds, the roller begins to continuously roll and press the inner wall of the workpiece. In this way, not only can the surface quality of the inner wall of the workpiece be improved, but also its hardness, wear resistance and fatigue resistance can be enhanced.

[0024] Preferably, the housing support assembly includes a cylinder 702, a connecting cylinder 703, an extension cylinder 704 and a fixed cylinder 705, a rolling cylinder 706 is fixed at the end of the fixed cylinder 705, a plurality of slots are arranged on the outer side of the rolling cylinder 706, and a fixed seat 709 is located in the slot and moves; A base 701 is fixedly disposed at the rear of the cylinder 702 , and the end of the base 701 is coaxially fixedly connected to the tailstock 3 of the machine tool through a flange and bolts.

[0025] These components together form a path extending from the tailstock of the machine tool to the inside of the workpiece. A rolling cylinder 706 is installed at one end of the fixed cylinder 705, and a plurality of slots are arranged on the outer side of the fixed cylinder 705. These slots are designed to cooperate with the drive head 708 and the fixed seat 709, so that the fixed seat 709 moves radially in the slots and then abuts against the inner wall of the workpiece 8.

[0026] The tail of the cylinder 702 is connected to the tailstock 3 of the machine tool through a base 701, which ensures that the entire device can be stably installed on the machine tool and ensures coaxiality.

[0027] Preferably, both ends of the cylinder 702 are connected to the base 701 and the connecting tube 703 respectively through flanges and bolts; The connecting tube 703 and the extension tube 704 are provided with a plurality of corresponding connecting holes on their circumferential sides; The rolling cylinder 706 and the fixing cylinder 705 are provided with a plurality of corresponding connection holes on their circumferential sides; A pin shaft 712 is fixed in the connection hole, and the pin shaft 712 is used to connect the two.

[0028] The cylinder barrel 702 is one of the core parts of the housing support assembly, and is connected to one end of the base 701 and the other end of the connecting barrel 703 through flanges and bolts. This connection method ensures the stability and accuracy between the components.

[0029] The connection between the connecting tube 703 and the extension tube 704 is achieved through a plurality of connection holes arranged on the circumference. A pin 712 is fixed inside these connection holes to ensure a stable connection between the two. The function of the pin 712 is to provide additional support to prevent loosening due to vibration or pressure during operation.

[0030] The extension tube 704 is used to extend the working length of the whole rolling device so that the device can be suitable for workpieces of different sizes. The connection between it and the connecting tube 703 is also realized by the connecting hole and the pin 712 of the circumferential side.

[0031] The fixing cylinder 705 is located at the front end of the whole device, and one end thereof is provided with a rolling cylinder 706. Similarly, the fixing cylinder and the rolling cylinder are connected reliably by a connecting hole and a pin 712 arranged on the periphery.

[0032] The outer side of the rolling cylinder 706 is provided with a plurality of slots, which are used to limit the radial movement range of the fixing seat 709 and support the fixing seat to move along a specific path. The rolling cylinder and the fixing cylinder are connected through the connecting holes on the circumference and the pin 712, which can ensure the accuracy of the position of the rolling cylinder and its stability during operation.

[0033] Preferably, the extension tube 704 and the fixed tube 705 are connected by a rectangular thread, and oil inlets are provided at both ends of the outer side of the cylinder tube 702 .

[0034] The extension tube 704 and the fixed tube 705 are connected by rectangular threads. This connection method provides a higher load-bearing capacity and better self-locking performance, is suitable for bearing larger axial forces and torques, and can easily adjust the length to meet the needs of workpieces of different sizes. The rectangular thread has a larger contact area, can provide better rigidity and stability, and is convenient for quick disassembly and maintenance.

[0035] The cylinder 702 is not only a part of the outer shell support assembly, but also plays the role of providing power for the internal drive assembly. It has oil inlets at both ends of the outer side, which are used to introduce high-pressure oil into the cylinder to push the internal drive assembly to move; after the work is completed, the oil flows out and returns to the oil tank or other storage device, so as to achieve recycling. The application of the hydraulic system enables the rolling device to generate enough force to effectively roll the workpiece, while also ensuring smooth and controllable movement.

[0036] Preferably, the internal drive assembly includes a core shaft 714, one end of the core shaft 714 is fixedly connected to the drive head 708, and the other end is provided with a piston body 710, and the piston body 710 is fixed to the end of the core shaft 714 through a locking nut 711; The piston body 710 is located in the cylinder barrel 702 in the shell support assembly and slides in a sealed manner. A sealing member is provided between the connecting barrel 703 and the core shaft 714 in the shell support assembly.

[0037] The internal drive assembly includes a mandrel 714, one end of which is fixedly connected to the drive head 708. The drive head 708 cooperates with the inclined groove 7091 at the bottom of the fixed seat 709 through the wedge block 7081 thereon to achieve radial movement. The other end of the mandrel 714 is provided with a piston body 710, which is fixed to the mandrel by a locking nut 711. This design ensures a firm connection between the piston body and the mandrel.

[0038] The piston body 710 is located in the cylinder barrel 702 in the housing support assembly and can slide in a sealed manner. This means that the piston body can move axially inside the cylinder barrel while maintaining good sealing performance to prevent oil leakage. In order to ensure the sealing between the piston body and the cylinder barrel, a sealing ring or other form of sealing member is usually installed on the outside of the piston body.

[0039] Seals are also provided between the connecting cylinder 703 and the mandrel 714. The function of these seals is to prevent the hydraulic oil from leaking from the connection, thereby ensuring the sealing and reliability of the entire system.

[0040] When rolling operation is required, high-pressure oil enters the cylinder 702 through the oil inlet, pushing the piston body 710 forward in the axial direction. As the piston body moves, the core shaft 714 and the drive head 708 fixed thereto are driven forward. The wedge block 7081 on the drive head 708 interacts with the inclined groove 7091 at the bottom of the fixed seat 709, causing the fixed seat to move radially outward, so that the roller 713 in the fixed seat contacts and squeezes the inner wall of the workpiece 8. While the machine tool rotates the workpiece, the rolling device feeds axially to complete the rolling strengthening treatment of the inner hole surface of the workpiece. After the processing is completed, the piston body 710 is reset by reversely passing oil to prepare for the next operation.

[0041] Preferably, an end cap 707 is fixedly provided at the end of the rolling cylinder 706, a groove is provided inside the end cap 707, and the end of the driving head 708 is located in the groove. The driving head 708 moves to the end and enters the groove, thereby achieving sealing and preventing foreign matter from entering the rolling cylinder 706.

[0042] Preferably, a fixed plate 4 is fixedly provided at the tail of the machine tool 1, a motor 5 is fixedly provided on one side of the fixed plate 4, a rotating screw 10 is provided between the machine tool slide rails 2 on both sides of the machine tool 1, one end of the screw 10 is fixedly connected to the output shaft of the motor 5, and the other end rests on the machine tool 1 through a bearing seat, and the bottom of the machine tool tailstock 3 is threadedly connected to the screw 10 through a thread sleeve 11.

[0043] The motor 5 drives the screw rod 10 to rotate, thereby driving the machine tool tailstock 3 to move, realizing the feeding of the rolling device 7, and at the same time cooperating with the machine tool chuck 9 to drive the workpiece 8 to rotate, so that the roller 713 moves and rolls in the workpiece 8.

[0044] Preferably, a hydraulic station is also provided, and the hydraulic station is connected to the oil ports at both ends of the cylinder 702 in the housing support assembly through a control valve and an oil pipe.

[0045] The hydraulic station is the power source of the entire system, and is responsible for providing high-pressure oil to drive the piston body 710 to move in the cylinder 702. The hydraulic station usually includes components such as an oil pump, an oil tank, a filter, and a cooler to ensure the quality and pressure stability of the oil.

[0046] The control valve is installed on the oil pipe between the hydraulic station and the cylinder barrel to control the direction, flow and pressure of the oil. By adjusting the state of the control valve, the movement speed and force of the piston body 710 can be accurately controlled. The control valve can be manually operated, electrically or pneumatically controlled, depending on the degree of automation required.

[0047] The oil pipe connects the hydraulic station with the oil inlets at both ends of the cylinder 702 to form a closed hydraulic circuit. The first oil inlet introduces high-pressure oil into the rear end of the cylinder to push the piston forward; the second oil inlet introduces high-pressure oil into the front end of the cylinder to push the piston backward to reset.

[0048] Preferably, a groove 7093 is provided on the top of the fixing seat 709, pin holes 7094 are provided on both sides of the groove 7092, the roller 713 is arranged in the groove 7092, and a pin shaft passes through the roller 713 and abuts against the pin hole 7094, a thread hole is provided on one side of the pin hole 7094, a threaded top screw is provided in the thread hole, and the end of the top screw abuts against the pin shaft.

[0049] The roller 713 rotates in the groove by abutting against the pin shaft, and the pin shaft is fixed by a top screw to prevent it from falling off.

[0050] Example 2 like Figures 1 to 3 As shown, combined with Example 1, the method for using the rolling strengthening device for inner hole surface treatment is further described as follows: S1. Installation Preparation Fixing the workpiece: The workpiece 8 to be processed is mounted and fixed on the machine tool chuck 9. Make sure that the workpiece is firmly clamped in the chuck to prevent displacement during processing.

[0051] Install the rolling device: Fix the rolling device 7 to the machine tailstock 3 with bolts. Ensure that the connection between the rolling device and the machine tailstock is firm and reliable.

[0052] Setting up sliding support seats: A plurality of sliding support seats 6 are set up in the middle of the rolling device 7. These support seats are used to ensure the stability of the rolling device 7 during the feeding process and ensure that the entire system including the workpiece, the rolling device and the sliding support seats are coaxially arranged.

[0053] S2. Hydraulic drive preparation Start the hydraulic station: Turn on the hydraulic station and prepare the high-pressure oil.

[0054] Driving the piston body: The oil flow direction is adjusted by the control valve so that the high-pressure oil enters the oil inlet of the cylinder 702, pushing the piston body 710 forward in the axial direction.

[0055] Advancing the mandrel: As the piston body 710 moves, the mandrel 714 and the drive head 708 fixed thereto also advance forward.

[0056] Radial expansion: The wedge block 7081 on the driving head 708 interacts with the inclined groove 7091 at the bottom of the fixing seat 709, so that the fixing seat moves radially, thereby driving the roller 713 to press against the inner wall of the workpiece 8.

[0057] S3. Processing Rotating the workpiece: Start the machine tool and drive the machine tool chuck 9 to rotate, so that the workpiece 8 starts to rotate.

[0058] Synchronous feeding: At the same time, the motor 5 drives the screw rod 10 to rotate, driving the machine tool tailstock 3 to move along the machine tool slide rail 2 to realize the feeding movement of the rolling device 7.

[0059] Rolling process: With the feeding of the rolling device 7, the roller 713 continuously rolls and presses on the inner wall of the workpiece 8 to complete the rolling strengthening treatment of the inner hole surface of the workpiece.

[0060] S4. End the operation Reset: After the processing is completed, the state is changed by the control valve so that the oil returns to the hydraulic station through the oil port, and the piston body 710 is reset.

[0061] Unloading the workpiece: Stop the rotation of the machine tool chuck 9, loosen the workpiece clamp, and remove the processed workpiece from the chuck.

[0062] Cleaning equipment: Check and clean the rolling device 7 and various parts of the machine tool to prepare for the next processing.

[0063] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. The rolling strengthening device for inner hole surface treatment is characterized by: It comprises a rolling device (7) mounted on a machine tool tailstock (3), the rolling device (7) being coaxially arranged with a workpiece (8) fixed on a machine tool chuck (9), and at least one sliding support seat (6) being provided between the rolling device (7) and the machine tool slide rail (2); The rolling device (7) comprises an outer shell support component and an internal drive component, the internal drive component is located in the outer shell component and reciprocates, a radially movable fixed seat (709) is provided at the end of the outer shell support component, a rotating roller (713) is provided in the fixed seat (709), and the roller (713) abuts against the inner wall of the workpiece (8); A driving head (708) is fixedly provided at the end of the internal driving assembly, a plurality of wedge blocks (7081) are provided on the outer side of one end of the driving head (708), a guide groove (7082) is provided on one side of the wedge block (7081), an inclined groove (7091) is provided at the bottom of the fixed seat (709), the fixed seat (709) slides against the inclined surface of the wedge block (7081) through the inclined groove (7091), a through hole (7092) is provided on one side of the inclined groove (7091), a pin shaft is fixedly provided in the through hole (7092), and the pin shaft slides against the guide groove (7082).

2. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: The housing support assembly comprises a cylinder (702), a connecting cylinder (703), an extension cylinder (704) and a fixed cylinder (705); a rolling cylinder (706) is fixedly provided at the end of the fixed cylinder (705); a plurality of slots are provided on the outside of the rolling cylinder (706); and a fixed seat (709) is located in the slots and moves. A base (701) is fixedly provided at the rear of the cylinder barrel (702), and an end of the base (701) is coaxially fixedly connected to a tailstock (3) of a machine tool via a flange and bolts.

3. The rolling strengthening device for inner hole surface treatment according to claim 2 is characterized in that: Two ends of the cylinder barrel (702) are respectively connected to the base (701) and the connecting barrel (703) through flanges and bolts; A plurality of corresponding connection holes are provided on the peripheral sides of the connecting tube (703) and the extension tube (704); A plurality of corresponding connection holes are provided on the circumferential sides of the rolling cylinder (706) and the fixing cylinder (705); A pin shaft (712) is fixedly arranged in the connection hole, and the pin shaft (712) is used to connect the two.

4. The rolling strengthening device for inner hole surface treatment according to claim 2 is characterized in that: The extension tube (704) and the fixed tube (705) are connected via a rectangular thread, and oil inlets are provided at both ends of the outer side of the cylinder tube (702).

5. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: The internal drive assembly comprises a core shaft (714), one end of the core shaft (714) is fixedly connected to the drive head (708), and the other end is provided with a piston body (710), and the piston body (710) is fixed to the end of the core shaft (714) by a locking nut (711); The piston body (710) is located in a cylinder barrel (702) in the housing support assembly and is sealed and slidable. A sealing member is provided between the connecting barrel (703) and the core shaft (714) in the housing support assembly.

6. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: An end cover (707) is fixedly provided at the end of the rolling cylinder (706), a groove is provided inside the end cover (707), and the end of the driving head (708) is located in the groove.

7. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: A fixed plate (4) is fixedly provided at the tail of the machine tool (1), a motor (5) is fixedly provided on one side of the fixed plate (4), a rotating screw rod (10) is provided between the machine tool slide rails (2) on both sides of the machine tool (1), one end of the screw rod (10) is fixedly connected to the output shaft of the motor (5), and the other end is abutted against the machine tool (1) through a bearing seat, and the bottom of the machine tool tailstock (3) is threadedly connected to the screw rod (10) through a threaded sleeve (11).

8. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: A hydraulic station is also provided, and the hydraulic station is connected to the oil ports at both ends of the cylinder barrel (702) in the housing support assembly through a control valve and an oil pipe.

9. The rolling strengthening device for inner hole surface treatment according to claim 1 is characterized in that: A groove (7093) is provided at the top of the fixing seat (709), pin holes (7094) are provided on both sides of the groove (7092), a roller (713) is provided in the groove (7092), and a pin shaft passes through the roller (713) and abuts against the pin hole (7094), a thread hole is provided on one side of the pin hole (7094), a threaded top screw is provided in the thread hole, and an end of the top screw abuts against the pin shaft.

10. The method for using the rolling strengthening device for inner hole surface treatment according to any one of claims 1 to 9, wherein the method steps are as follows: S1, fixing the workpiece (8) on the machine tool chuck (9), fixing the tail of the rolling device (7) on the tailstock (3) of the machine tool by bolts, and setting a plurality of sliding support seats (6) in the middle of the rolling device (7) to ensure that the workpiece (8), the rolling device (7) and the sliding support seats (6) are coaxially arranged; S2, driving the piston body (710) and the core shaft (714) to push forward through the hydraulic station, so that the driving head (708) in the rolling cylinder (706) at the end moves forward, thereby driving the fixing seat (709) to move radially, so that the roller (713) abuts against the inner wall of the workpiece (8); S3, driving the machine tool chuck (9) to rotate, and synchronously driving the machine tool tailstock (3) to move through the motor (5) and the screw rod (10), so that the rolling device (7) moves and feeds, so that the roller (713) abuts against the inner wall of the workpiece (8) to perform rolling movement.

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