Automatic rolling device for hole inner surface treatment

Abstract

The utility model provides an automatic rolling device for processing the inner surface of a hole, which comprises a rolling device arranged 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 support 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 conical head is fixedly arranged at one end of the driving head, a plurality of slopes are evenly distributed on the outer side of the conical head, a dovetail groove is formed in the middle of each slope, and a dovetail block is fixedly arranged at the bottom of the fixing base and abuts against the interior of the dovetail groove to move. 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 utility model relates to the field of inner hole surface treatment, in particular to an automatic rolling device for inner hole surface treatment. Background Art

[0002] Strengthening the inner wall of an inner hole is an important process for improving the surface hardness, fatigue strength and corrosion resistance of the inner wall of a workpiece. It is widely used in aerospace, automobile manufacturing, mechanical processing and other fields. Currently, the commonly used methods for strengthening the inner wall of an inner hole include rolling strengthening, shot peening, laser shock strengthening, ultrasonic shock strengthening, carburizing and nitriding, induction hardening, electroplating and spraying. However, a 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 makes it difficult to meet the needs of modern manufacturing for efficient and automated production. Utility Model Content

[0003] The main purpose of the utility model is to provide an automatic rolling device for treating the inner surface of a hole, so as 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 as follows: 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;

[0005] The rolling device includes an outer shell support assembly and an internal drive assembly. The internal drive assembly is located between the outer shells and moves back and forth. The end of the outer shell support assembly is provided with a radially movable fixed seat. The fixed seat is provided with a rotating roller, which rests on the inner wall of the workpiece.

[0006] A driving head is fixedly provided at the end of the internal driving assembly, and a cone head is fixedly provided at one end of the driving head. Multiple inclined surfaces are evenly distributed on the outside of the cone head, and a dovetail groove is provided in the middle of the inclined surface. A dovetail block is fixedly provided at the bottom of the fixed seat, and the dovetail block moves against the dovetail groove. A groove is provided at the top of the fixed seat, and pin holes are provided on both sides of the groove. The roller is provided in the groove and passes through the roller through the pin hole. A wire hole is provided on one side of the pin hole, and a top screw is fixed in the wire hole, and the end of the top screw rests on the pin shaft;

[0007] A guide end cover is fixedly provided at the end of the rolling cylinder, a sliding guide shaft is provided in the middle of the guide end cover, the guide shaft is coaxially arranged with the driving head, and the end of the guide shaft is fixedly connected to the driving head.

[0008] Preferably, the housing support assembly includes a cylinder, a connecting cylinder, an extension cylinder and a fixed cylinder, a rolling cylinder is fixed to the end of the fixed cylinder, a plurality of slots are provided on the outside of the rolling cylinder, and the fixing seat is located in the slot and moves;

[0009] A base is fixed at the tail of the cylinder, and the end of the base is coaxially fixedly connected to the tailstock of the machine tool through a flange and bolts.

[0010] Preferably, both ends of the cylinder are connected to the base and the connecting tube respectively through flanges and bolts;

[0011] The connecting tube and the extension tube are provided with a plurality of corresponding connecting holes on their circumferential sides;

[0012] The circumference of the rolling cylinder and the fixing cylinder is provided with a plurality of corresponding connecting holes;

[0013] A pin is fixed in the connecting hole and is used to connect the two.

[0014] 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.

[0015] Preferably, the internal drive assembly includes a core shaft, one end of the core shaft is fixedly connected to the drive head, and the other end is provided with a piston body, and the piston body is fixed to the end of the core shaft by a locking nut;

[0016] The piston body is located in the cylinder of the shell support assembly and slides in a sealed manner. A sealing member is provided between the connecting cylinder and the core shaft in the shell support assembly.

[0017] 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.

[0018] Preferably, a hydraulic station is further provided, which 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.

[0019] The utility model provides an automatic rolling device for treating the inner surface of a hole, which has the following beneficial effects:

[0020] 1. By continuously rolling 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.

[0021] 2. The plastic deformation produced during the rolling process generates 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.

[0022] 3. The hydraulic drive system allows the piston's speed and force to be precisely adjusted through the control valve, ensuring stability and consistency during the rolling process. The combination of the screw and motor enables precise feed of the machine's tailstock, ensuring the relative position accuracy between the rolling device and the workpiece.

[0023] 4. The entire device can be controlled by a CNC system to achieve automated operation, reducing manual intervention and improving production efficiency. The integrated design of components such as the hydraulic station, motor, and control valve makes the operation of the entire system easier and more reliable.

[0024] 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 accommodate 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

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a front view of the overall structure of the utility model;

[0027] Figure 2 This is a front sectional view of the tailstock drive structure of the machine tool of the utility model;

[0028] Figure 3 This is a front cross-sectional view of the rolling device of the utility model;

[0029] Figure 4 This utility model Figure 3 Middle AA section view;

[0030] Figure 5 This is a side view of the drive head shaft of the utility model;

[0031] Figure 6 This utility model Figure 7 Side view of;

[0032] Figure 7 This is a side view of the fixed seat axis of the utility model;

[0033] Figure 8 This utility model Figure 5 A front sectional view of

[0034] 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; guide end cover 707; drive head 708; cone head 7081; inclined surface 7082; dovetail groove 7083; fixing seat 709; dovetail block 7091; groove 7092; pin hole 7093; thread hole 7094; piston body 710; locking nut 711; pin shaft 712; roller 713; core shaft 714; guide shaft 715; workpiece 8; machine tool chuck 9; screw rod 10; thread sleeve 11. DETAILED DESCRIPTION

[0035] Example 1

[0036] like Figures 1 to 8 As shown, the automatic rolling device for treating the inner surface of the hole includes a rolling device 7 mounted 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;

[0037] The rolling device 7 includes an outer shell support assembly and an internal drive assembly. The internal drive assembly is located between the outer shells and moves back and forth. A radially movable fixed seat 709 is provided at the end of the outer shell support assembly. A rotating roller 713 is provided in the fixed seat 709. The roller 713 abuts against the inner wall of the workpiece 8.

[0038] A driving head 708 is fixed to the end of the internal driving component, and a cone head 7081 is fixed to one end of the driving head 708. A plurality of inclined surfaces 7082 are evenly distributed on the outer side of the cone head 7081. A dovetail groove 7083 is provided in the middle of the inclined surface 7082. A dovetail block 7091 is fixed to the bottom of the fixed seat 709. The dovetail block 7091 moves against the dovetail groove 7083. A groove 7092 is provided at the top of the fixed seat 709. Pin holes 7093 are provided on both sides of the groove 7092. A roller 713 is provided in the groove 7092 and passes through the roller 713 through a pin shaft to rest against the pin hole 7093. A wire hole 7094 is provided on one side of the pin hole 7093. A top screw is fixed in the wire hole 7094, and the end of the top screw rests on the pin shaft.

[0039] A guide end cover 707 is fixedly provided at the end of the rolling cylinder 706 , and a sliding guide shaft 715 is provided in the middle of the guide end cover 707 . The guide shaft 715 is coaxially arranged with the driving head 708 , and the end of the guide shaft 715 is fixedly connected to the driving head 708 .

[0040] 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 multiple sliding support seats 6 so that the rolling device 7 and the workpiece 8 are coaxially arranged; the driving head 708 is driven to move by the internal driving assembly, and then the inclined surface 7082 and the dovetail groove 7083 on the cone head 7081 cooperate with the dovetail block 7091 at the bottom of the fixed seat 709, and the outer slot of the rolling cylinder 706 is restricted, 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 by the machine tool 1 and feeding the rolling device 7.

[0041] The details of the rolling device include an outer shell support assembly and an internal drive assembly. The internal drive assembly is capable of moving within the outer shell. A radially movable mounting bracket is located at one end of the outer shell support assembly. Rotating rollers are mounted within the bracket, directly contacting and acting on the inner wall of the workpiece. The drive assembly has a drive head at the end, which is equipped with a cone. In this example, the cone head has six inclined surfaces with dovetail grooves in the middle. A dovetail block is located at the bottom of the mounting bracket, which interacts with the dovetail grooves on the drive head to achieve radial movement.

[0042] When the inner wall of a workpiece needs to be processed, the workpiece is first mounted on the machine tool chuck, and the rolling device is ensured to be correctly installed on the machine tailstock and coaxial with it. Next, the internal drive assembly is activated to propel the drive head forward. At this time, the beveled fit between the dovetail groove and the dovetail block, coupled with the constraints of the outer slot of the rolling cylinder, causes the fixed seat to expand radially outward. During this expansion process, the rollers located in the fixed seat will adhere 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 rollers begin to continuously roll and press the inner wall of the workpiece. This not only improves the surface quality of the inner wall of the workpiece, but also enhances its hardness, wear resistance, and fatigue resistance.

[0043] 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 to the end of the fixed cylinder 705. A plurality of slots are provided on the outside of the rolling cylinder 706. The fixing seat 709 is located in the slots and moves.

[0044] A base 701 is fixedly provided at the tail end 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.

[0045] Together, these components form a path extending from the machine's tailstock to the interior of the workpiece. A rolling cylinder 706 is mounted on one end of the fixed cylinder 705, which has multiple slots on its exterior. These slots are designed to cooperate with the drive head 708 and fixed seat 709, allowing the fixed seat 709 to move radially within the slots and then rest against the inner wall of the workpiece 8.

[0046] 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 firmly installed on the machine tool and ensures coaxiality.

[0047] Preferably, both ends of the cylinder 702 are connected to the base 701 and the connecting tube 703 respectively through flanges and bolts;

[0048] The connecting tube 703 and the extension tube 704 are provided with a plurality of corresponding connecting holes on their circumferences;

[0049] The rolling cylinder 706 and the fixing cylinder 705 are provided with a plurality of corresponding connection holes on their circumferences;

[0050] A pin 712 is fixed in the connecting hole and is used to connect the two.

[0051] Cylinder 702 is one of the core parts of the housing support assembly, which is connected to one end of the base 701 and the other end of the connecting tube 703 through flanges and bolts. This connection method ensures the stability and accuracy between the components.

[0052] The connecting tube 703 and the extension tube 704 are connected by multiple connecting holes arranged around their sides. Pins 712 are fixed inside these holes to ensure a stable connection between the two. The pins 712 provide additional support to prevent loosening due to vibration or pressure during operation.

[0053] The extension tube 704 is used to extend the working length of the entire rolling device so that the device can be applicable to workpieces of different sizes. The connection between the extension tube 704 and the connecting tube 703 is also realized by the connecting hole and the pin 712 of the circumferential side.

[0054] The fixing cylinder 705 is located at the front end of the entire device, and one end thereof is provided with a rolling cylinder 706. Similarly, the fixing cylinder and the rolling cylinder are connected by a connecting hole and a pin 712 provided on the periphery to ensure reliable connection between the two.

[0055] The outer surface of the rolling cylinder 706 is provided with multiple slots that limit the radial movement of the fixed base 709 and support its movement along a specific path. The rolling cylinder and the fixed base are connected by peripheral connecting holes and a pin 712, which ensures the accuracy of the rolling cylinder's position and its stability during operation.

[0056] 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.

[0057] The connection between the extension cylinder 704 and the fixed cylinder 705 adopts a rectangular thread connection. This connection provides high load capacity and good self-locking performance, is suitable for bearing large axial force and torque, and can conveniently adjust the length to adapt to the requirements of workpieces of different sizes. The rectangular thread has a large contact area, which can provide better rigidity and stability, and facilitates quick disassembly and maintenance.

[0058] The cylinder 702 is not only part of the shell support assembly, but also bears the function of providing power for the internal drive assembly. The two ends of its outer side are provided with oil inlets for introducing high-pressure oil into the cylinder to push the internal drive assembly to move; the oil after completing the work flows out and returns to the oil tank or other storage devices, thereby realizing cyclic use. The application of the hydraulic system enables the rolling device to generate sufficient power to effectively roll the workpiece, while ensuring smooth and controllable action.

[0059] Preferably, the internal drive assembly includes a mandrel 714, one end of which is fixedly connected with the drive head 708, and the other end is provided with a piston body 710, which is fixed at the end of the mandrel 714 by a locking nut 711.

[0060] The piston body 710 is located in the cylinder 702 in the shell support assembly and can seal and slide. The connecting cylinder 703 in the shell support assembly is provided with a sealing member between the mandrel 714.

[0061] The internal drive assembly includes a mandrel 714, one end of which is fixedly connected with the drive head 708. The drive head 708 is matched with the dovetail block 7091 at the bottom of the fixed seat 709 through the dovetail groove 7083 thereon, to realize radial movement. The other end of the mandrel 714 is provided with a piston body 710, which is fixed on the mandrel by a locking nut 711. This design ensures the firm connection between the piston body and the mandrel.

[0062] The piston body 710 is located in the cylinder 702 in the shell support assembly and can seal and slide. This means that the piston body can move axially inside the cylinder while maintaining good sealing performance to prevent oil leakage. In order to ensure the sealing performance between the piston body and the cylinder, a sealing ring or other form of sealing member is usually installed on the outside of the piston body.

[0063] Sealing members are also provided between the connecting cylinder 703 and the mandrel 714. The function of these sealing members is to prevent hydraulic oil from leaking from the connection, ensuring the sealing performance and reliability of the entire system.

[0064] When the rolling operation is needed, high-pressure oil enters the cylinder 702 through the oil inlet, pushing the piston body 710 to move axially. With the movement of the piston body, the mandrel 714 and the drive head 708 fixed thereto are pushed forward. The dovetail groove 7083 on the drive head 708 interacts with the dovetail block 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 extrudes the inner wall of the workpiece 8. While the machine tool rotates the workpiece, the rolling device feeds axially, completing the rolling strengthening treatment of the inner surface of the workpiece. After processing, the piston body 710 is reset by reversing the oil inlet, preparing for the next operation.

[0065] Preferably, the rolling cylinder 706 is fixed at the end of the guide end cover 707, and the guide end cover 707 is internally provided with a sliding guide shaft 715, which is coaxially arranged with the drive head 708, and the end of the guide shaft 715 is fixedly connected with the drive head 708. By moving the guide shaft 715 in the guide end cover 707, the end of the drive head 708 can be guided and supported.

[0066] Preferably, the machine tool 1 is fixedly provided with a fixed plate 4, the fixed plate 4 is fixedly provided with a motor 5, the machine tool slide rails 2 on both sides of the machine tool 1 are provided with a rotating lead screw 10, one end of the lead screw 10 is fixedly connected with the output shaft of the motor 5, the other end is abutted on the machine tool 1 through a bearing seat, and the bottom of the machine tool tail seat 3 is threadedly connected with the lead screw 10 through a lead sleeve 11.

[0067] The motor 5 drives the lead screw 10 to rotate, thereby driving the machine tool tail seat 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.

[0068] Preferably, a hydraulic station is also provided, which is in communication with the oil ports at both ends of the cylinder 702 in the housing support assembly through control valves and oil pipes.

[0069] The hydraulic station is the power source of the entire system, which is responsible for providing high-pressure oil to drive the movement of the piston body 710 in the cylinder 702. The hydraulic station usually includes an oil pump, an oil tank, a filter, a cooler and other components to ensure the quality and stability of the oil pressure.

[0070] The control valve is installed on the oil pipe between the hydraulic station and the cylinder, which is used to control the direction, flow and pressure of the oil. By adjusting the state of the control valve, the speed and force of the movement of the piston body 710 can be accurately controlled. The control valve can be manually operated, or electrically or pneumatically controlled, depending on the demand for automation.

[0071] The oil pipe connects the hydraulic station with the oil inlet at both ends of the cylinder barrel 702, forming a closed hydraulic circuit. The first oil inlet introduces high-pressure oil into the rear end of the cylinder barrel, pushing the piston body forward; the second oil inlet introduces high-pressure oil into the front end of the cylinder barrel, pushing the piston body back to reset.

[0072] Example 2

[0073] As Figures 1-3 shown, further illustrated in conjunction with Example 1, the method steps for using the automatic rolling device for hole inner surface treatment are as follows:

[0074] S1, installation preparation

[0075] Fix the workpiece: Install and fix the workpiece 8 to be processed on the machine tool chuck 9. Ensure that the workpiece is firmly clamped in the chuck to prevent displacement during processing.

[0076] Install the rolling device: Install the rolling device 7 on the machine tool tailstock 3 by bolting. Ensure that the connection between the rolling device and the machine tool tailstock is stable and reliable.

[0077] Set up the sliding support seat: Set up multiple sliding support seats 6 in the middle of the machine tool tailstock 3, which are used to ensure the stability of the rolling device 7 during feeding and ensure that the entire system including the workpiece, the rolling device, and the sliding support seat are coaxially arranged.

[0078] S2, hydraulic drive preparation

[0079] Start the hydraulic station: Turn on the hydraulic station and prepare high-pressure oil.

[0080] Drive the piston body: Adjust the oil flow direction by controlling the valve, make high-pressure oil enter the oil inlet of the cylinder barrel 702, and push the piston body 710 to move axially forward.

[0081] Advance the mandrel: As the piston body 710 moves, the mandrel 714 and the drive head 708 fixed thereto also advance forward.

[0082] Radial expansion: The dovetail groove 7083 on the drive head 708 interacts with the dovetail block 7091 at the bottom of the fixed seat 709, causing the fixed seat to move radially, thereby causing the roller 713 to abut against the inner wall of the workpiece 8.

[0083] S3, processing

[0084] Rotate the workpiece: Start the machine tool and drive the machine tool chuck 9 to rotate, so that the workpiece 8 starts to rotate.

[0085] Synchronous feeding: At the same time, drive the screw 10 to rotate by the motor 5, drive the machine tool tailstock 3 to move along the machine tool slide rail 2, and realize the feeding motion of the rolling device 7.

[0086] Rolling processing: with the feeding of the rolling device 7, the roller 713 continuously rolls and presses on the inner wall of the workpiece 8, and the rolling strengthening treatment of the inner hole surface of the workpiece is completed.

[0087] S4, end operation

[0088] Reset: after the processing is completed, the state of the control valve is changed, so that the oil returns to the hydraulic station through the oil port, and the piston body 710 is reset.

[0089] Unload the workpiece: stop the rotation of the machine tool chuck 9, loosen the workpiece clamp, and take off the processed workpiece from the chuck.

[0090] Clean the equipment: check and clean the rolling device 7 and each part of the machine tool, and prepare for the next processing.

[0091] The above embodiment is only a preferred technical solution of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solution recited in the claims, including the equivalent replacement scheme of the technical features recited in the claims. That is, the equivalent replacement improvement within this scope is also within the protection scope of the present application.

Claims

1. Automatic rolling device for hole surface treatment, 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) includes a shell support assembly and an internal drive assembly, wherein the internal drive assembly is located between the shells and reciprocates within the assembly, and a radially movable fixed seat (709) is provided at the end of the shell support assembly, and 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 component, a cone head (7081) is fixedly provided at one end of the driving head (708), a plurality of inclined surfaces (7082) are evenly distributed on the outside of the cone head (7081), a dovetail groove (7083) is provided in the middle of the inclined surface (7082), a dovetail block (7091) is fixedly provided at the bottom of the fixed seat (709), the dovetail block (7091) moves against the dovetail groove (7083), a groove (7092) is provided at the top of the fixed seat (709), pin holes (7093) 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 (7093), a wire hole (7094) is provided on one side of the pin hole (7093), a top screw is fixed in the wire hole (7094), and the end of the top screw abuts against the pin shaft; A guide end cover (707) is fixedly provided at the end of the rolling cylinder (706), a sliding guide shaft (715) is provided in the middle of the guide end cover (707), the guide shaft (715) and the drive head (708) are coaxially arranged, and the end of the guide shaft (715) is fixedly connected to the drive head (708).

2. The automatic rolling device for treating the inner surface of a hole according to claim 1, 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 tail 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.

3. The automatic rolling device for treating the inner surface of a hole according to claim 2, characterized in that: 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 fixedly arranged in the connection hole, and the pin shaft (712) is used to connect the two.

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

5. The automatic rolling device for treating the inner surface of a hole according to claim 1, characterized in that: 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 a cylinder barrel (702) in the housing 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 housing support assembly.

6. The automatic rolling device for treating inner hole surface according to claim 1, 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 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 rod (10) through a threaded sleeve (11).

7. The automatic rolling device for treating inner hole surface according to claim 1, characterized in that: A hydraulic station is also provided, which 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.

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