Deep rolling machine tool for shaft parts and application of deep rolling machine tool

Abstract

The invention relates to a shaft part deep rolling machine tool and application thereof.The shaft part deep rolling machine tool comprises a machine tool body, a spindle box, a tailstock, Z-axis longitudinal feeding mechanisms and a rolling device, the spindle box and the tailstock are arranged at the two ends of the machine tool body respectively, and the Z-axis longitudinal feeding mechanisms are arranged on the two sides of the machine tool body respectively; the rolling device comprises a dragging plate, X-axis feeding mechanisms, B-axis rotating mechanisms, hydraulic cylinder telescopic mechanisms and a rolling mechanism, the lower side of the dragging plate is connected with a Z-axis longitudinal feeding mechanism, the X-axis feeding mechanisms are symmetrically arranged on the two sides of the dragging plate, the B-axis rotating mechanisms are arranged on the X-axis feeding mechanisms, a plurality of hydraulic cylinder telescopic mechanisms are arranged in the B-axis rotating mechanisms, and the rolling mechanism is connected with the Z-axis longitudinal feeding mechanism. And a rolling mechanism is arranged on the hydraulic cylinder telescoping mechanism. The rolling mechanisms can be adjusted in real time when the surfaces of the workpieces are machined, normal machining of the rolling mechanisms and the workpieces is guaranteed all the time, automatic switching of the rolling mechanisms of different sizes can be achieved, the machining requirements of different sizes of the whole workpieces are met, and efficiency is high.

Description

Technical Field

[0001] The invention relates to a deep rolling machine tool for shaft parts and application thereof, belonging to the technical field of rolling processing. Background Art

[0002] Rolling is a chipless process that applies a certain pressure to the workpiece surface through a certain form of rolling tool. The plastic deformation of the metal is used at room temperature to flatten the microscopic unevenness of the workpiece surface, thereby achieving the purpose of changing the surface structure, surface roughness, mechanical properties, shape and size, ensuring surface integrity and achieving surface modification, and improving the fatigue strength and fatigue life of the workpiece.

[0003] At present, rolling machines are usually used to roll workpieces. The workpieces are installed in a clamping and pushing manner on the rolling machines. After the workpieces are clamped, they are rolled by rollers. Existing rolling machines, such as cylindrical rolling machines and CNC rolling machines, are mostly used to process workpieces with relatively simple shapes and structures. The position of the rollers is mostly fixed during the processing. When the surface of the workpiece has multiple structural forms, for example, when the surface of the workpiece has arc surfaces, cylindrical surfaces and conical surfaces at the same time, it is necessary to stop the machine to adjust the position of the rollers so that the rollers are always in the normal rolling processing position with the workpiece surface.

[0004] Chinese patent document CN105397406 A discloses a rolling machine and its application, including a bed, a spindle box, a longitudinal feed mechanism and a tailstock. The bed is also provided with a hydraulic turntable feed device, which includes a support plate, a swing mechanism, a telescopic mechanism and a rolling device. Swing mechanisms are respectively arranged on both sides of the support plate, and a telescopic mechanism is arranged on the swing mechanism. A rolling device is installed at one end of the telescopic mechanism. The rolling devices on both sides are arranged relatively, and the support plate is connected to the longitudinal feed mechanism. The normal processing of the roller of the machine tool needs to drive the gear and the fan gear ring to move through the rotation of the servo motor, so that the swing mechanism rotates, which is a large radius angle rotation, slow speed, slow switching of the processing position back to the original position, and low efficiency; the roller feed uses a large stroke hydraulic cylinder feed, which is slow when contacting the workpiece and has a long waiting time. Only one size of roller can be installed on both sides of the machine tool. When different sizes need to be processed on one axis, the machine tool needs to be stopped and the rollers of different sizes need to be manually replaced, which has low processing efficiency. For this reason, the present invention is proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a deep rolling machine for shaft parts. The rolling mechanism can be adjusted in real time when processing the workpiece surface, so that the rolling force and the workpiece processing position are always normal, and rolling mechanisms of different sizes and specifications can be automatically switched to meet the processing requirements of different sizes of the entire workpiece with high efficiency.

[0006] The present invention also provides application of the deep rolling machine for shaft parts.

[0007] The technical solution of the present invention is as follows:

[0008] A deep rolling machine for shaft parts, comprising a machine bed, a spindle box, a tailstock, a Z-axis longitudinal feed mechanism and a rolling device, wherein the spindle box and the tailstock are respectively arranged at both ends of the machine bed, the Z-axis longitudinal feed mechanism is arranged at the front side of the machine bed, and the upper part of the Z-axis longitudinal feed mechanism is connected to the rolling device to drag the rolling device for movement;

[0009] The rolling device includes a carriage, an X-axis feeding mechanism, a B-axis rotating mechanism, a hydraulic cylinder telescopic mechanism and a rolling mechanism. The lower side of the carriage is connected to the Z-axis longitudinal feeding mechanism, the X-axis feeding mechanisms are symmetrically arranged on both sides of the carriage, the B-axis rotating mechanism is arranged on the X-axis feeding mechanism, a number of hydraulic cylinder telescopic mechanisms are arranged in the B-axis rotating mechanism, and a rolling mechanism is arranged on the hydraulic cylinder telescopic mechanism.

[0010] When the workpiece is clamped between the spindle box and the tailstock, the rolling devices on both sides of the support plate are respectively located on both sides of the workpiece, and the rolling mechanisms on both sides contact the surface of the workpiece for rolling processing. When the workpiece surface has an arc surface, a cylindrical surface and a conical surface, the rolling mechanism can be moved by the Z-axis longitudinal feed mechanism (moving parallel to the axis of the workpiece), the X-axis feed mechanism (moving perpendicular to the axis of the workpiece), and the B-axis rotation mechanism to achieve the rolling mechanism always performing normal processing on the workpiece processing surface.

[0011] Preferably, according to the present invention, the X-axis feed mechanism includes a linear slide, a servo motor A, a planetary gear reducer, a coupling, a tapered roller bearing seat, a deep groove ball bearing seat, a ball screw and a slide plate. A planetary gear reducer is arranged on one side of the slide plate through a reducer connecting seat, the input side of the planetary gear reducer is connected to the servo motor A, and the output side is connected to the ball screw through a coupling. Both ends of the ball screw are respectively arranged on the slide plate through a tapered roller bearing seat and a deep groove ball bearing seat, linear slides are respectively arranged on the slide plate on both sides of the ball screw, slide plates are arranged on the ball screw and the linear slides, and a B-axis rotation mechanism is arranged on the slide plate.

[0012] The rotary motion output by the servo motor A is converted into linear motion through the ball screw and linear guide rail. The linear motion has high precision, the servo positioning is accurate, and the output torque is large, ensuring the stability and accuracy of the rolling process.

[0013] Preferably, according to the present invention, the B-axis rotation mechanism includes a servo motor B, a planetary gear reducer, a coupling, a worm wheel, a worm, a rotating body, a shell and a base plate, wherein a shell is fixedly arranged on the base plate, a planetary gear reducer is arranged on the outer side of the top of the shell through a reducer connecting seat, the input side of the planetary gear reducer is connected to the servo motor B, and the output side is connected to the worm through a coupling, and both ends of the worm are respectively fixed in the shell through a bearing seat and a deep groove ball bearing, and the worm is connected to the rotating body through a worm wheel, the lower part of the rotating body is fixed to the base plate through a turntable bearing, and the upper part of the rotating body is fixed in the shell through a cylindrical roller bearing, and a plurality of hydraulic cylinder telescopic mechanisms are arranged around the middle part of the rotating body, and the number of hydraulic cylinder telescopic mechanisms can be determined according to the required rolling mechanism model, and the shell on the outer side of the middle part of the rotating body is hollowed out to facilitate the extension of the hydraulic cylinder telescopic mechanism, and after the two sets of rotating mechanisms with perpendicular axes transmit motion through the worm wheel and worm, the rotation accuracy is high and the load-bearing capacity is large, which greatly improves the stability of the machine tool during processing and realizes automatic tool change switching.

[0014] Preferably, according to the present invention, the hydraulic cylinder telescopic mechanism includes an outer sleeve, a piston and a rear cover. The rear cover is fixedly provided on one side of the outer sleeve. The rear cover is externally connected to a hydraulic pipeline. A piston is slidably provided inside the outer sleeve. A rolling mechanism is provided on the outer side of the piston through an anti-rotation block. The piston is positioned by the anti-rotation block to prevent the center of the circle from rotating during movement.

[0015] According to a further preferred embodiment of the present invention, a hydraulic swivel joint is provided at the top of the rotating body, and the external hydraulic pipeline is connected to the rear cover through the hydraulic swivel joint and the hydraulic pipeline inside the rotating body. The hydraulic swivel joint ensures that the hydraulic pipeline is not affected by the rotation.

[0016] According to the preferred embodiment of the present invention, the rolling mechanism includes a roller frame, a roller shaft, a bearing and a roller, the roller frame is fixed to the outside of the piston, the outside of the roller frame is a U-shaped groove, the roller shaft is fixed to both sides of the U-shaped groove, the roller shaft is provided with a roller through two bearing sleeves on the outside of the roller shaft, and an adjustment pad is provided between the two bearings. The whole mechanism can realize the rapid replacement of the roller.

[0017] Preferably, according to the present invention, a roller shaft locking plate is provided on the lower side of the roller frame, and the roller shaft and the bearing are pre-tightened during installation through the roller shaft locking plate. The roller frame is embedded in the groove on the outside of the piston through the protrusion and is fixed by a flat key. The flat key can be used to prevent the rotation of the roller and play a guiding role.

[0018] Preferably according to the present invention, the front rolling mechanism may be an ultrasonic rolling device, comprising a main body for accommodating an ultrasonic generating part and loading a tool head, and a tool head for processing.

[0019] The application of the above-mentioned deep rolling machine for shaft parts is as follows:

[0020] (1) The workpiece is installed between the spindle box and the tailstock, and the Z-axis longitudinal feed mechanism moves to bring the rolling mechanism to the preset processing position of the workpiece;

[0021] (2) The B-axis rotation mechanism moves, selects the rolling mechanism corresponding to the processing size, rotates it to be perpendicular to the workpiece axis, fills the hydraulic cylinder telescopic mechanism with oil, extends the piston, and then starts the X-axis feed mechanism to move forward, pushing the rolling mechanism onto the workpiece, and the piston is compressed back a certain distance to achieve flexible contact between the rolling mechanism and the workpiece;

[0022] The hydraulic cylinder telescopic mechanism cooperates with the X-axis feeding mechanism to ensure that the rolling mechanism and the workpiece are in flexible contact with a small pressure, and the rolling mechanism and the workpiece are in full contact without damaging the workpiece.

[0023] (3) The machine tool is started and the workpiece is rolled. When the workpiece is processed to a curved or other irregular surface, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, the X-axis feed mechanism is retracted, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, and the rolling mechanism is separated from the workpiece. Then the servo motor B is started, and the position of the rotating body is adjusted through the worm and worm gear, and then the normal position of the rolling mechanism and the workpiece is adjusted. Then the rolling process is performed until the entire workpiece is processed. This process can also realize continuous processing, that is, the Z-axis feed mechanism, the X-axis feed mechanism and the B-axis rotation mechanism are linked to perform continuous normal processing on the irregular surface.

[0024] Preferably, according to the present invention, in step (3), if it is necessary to replace a rolling mechanism of a different type, the position of the rotating body is adjusted, and the rolling mechanism of the corresponding type is adjusted to the outside, corresponding to the workpiece working surface, and then the hydraulic cylinder telescopic mechanism cooperates with the X-axis feed mechanism to make the rolling mechanism press the workpiece, and after reaching the preset pressure, the rolling process continues.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention optimizes the entire rolling device. After installing the improved X-axis feeding mechanism, B-axis rotating mechanism, hydraulic cylinder telescopic mechanism, and rolling mechanism on the longitudinal feeding mechanism, normal rolling processing of the workpiece having the outer cylindrical surface, conical surface, and arc surface is realized. The rolling mechanism is automatically switched according to the size of the workpiece during the production process. The forward and backward rotation speed of the rolling mechanism is faster, which greatly improves the production efficiency. When the rolling mechanism contacts the workpiece, flexible contact with small pressure is achieved without damaging the workpiece.

[0027] 2. The rolling device of the present invention has rolling mechanisms symmetrically arranged on both sides. When rolling the workpiece, the two opposite rolling mechanisms act on both sides of the workpiece at the same time, so that the radial force on the workpiece is zero. Since the radial force on the workpiece is zero, the impact on the spindle and tailstock of the machine tool during rolling is minimal.

[0028] 3. The present invention applies the same rolling force on both sides of the workpiece, so that the strengthening effect of each part of the workpiece surface after rolling strengthening is consistent, and the overall strength of the rolling device of the present invention is higher, and the maximum rolling force can reach 50KN, reaching the scope of deep rolling processing, far exceeding the rolling force of existing machine tools.

[0029] 4. The advantages of ultrasonic rolling processing in the present invention: the force on the workpiece is smaller than that of traditional rolling, and the impact on the machine tool is small. The surface strengthening layer is deep, and the strengthening layer and the inside of the material are continuously transitioned without peeling, which is extremely beneficial to the performance of the parts.

[0030] 5. The rolling force of the present invention adopts system servo control, which can be flexibly programmed. At the same time, the rolling force can be monitored in real time to meet the rolling processing of shaft parts with different precision and different requirements; a complete rolling process database is formed, including surface integrity and surface modification indicators that can be achieved under different line speeds, feed rates, rolling forces and different rolling mechanism conditions.

[0031] 6. When the present invention is used, the processing data can generate a pressure-time curve at any time and can be saved at any time; it can be consulted and traced later. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the rolling device of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the X-axis feeding mechanism of the present invention;

[0035] Figure 4 It is a schematic diagram of the front view structure of the B-axis rotation mechanism of the present invention;

[0036] Figure 5 for Figure 4 BB section diagram in FIG.

[0037] Figure 6 for Figure 4 AA section diagram in FIG.

[0038] Figure 7 This is a schematic diagram of the structure of the hydraulic telescopic mechanism of Example 1 of the present invention;

[0039] Figure 8 for Figure 7 AA section diagram in FIG.

[0040] Fig. 9 This is a schematic structural diagram of an ultrasonic rolling device according to Embodiment 4 of the present invention;

[0041] Fig.10 for Fig. 9 AA section diagram in FIG.

[0042] Among them: 1. machine tool bed, 2. spindle box, 3. tailstock, 4. Z-axis longitudinal feed mechanism, 5. rolling device, 6. workpiece;

[0043] 51. carriage, 52. X-axis feeding mechanism, 53. B-axis rotating mechanism, 54. hydraulic cylinder telescopic mechanism, 55. rolling mechanism;

[0044] 521, servo motor A, 522, planetary gear reducer, 523, reducer connecting seat, 524, coupling, 525, tapered roller bearing seat, 526, deep groove ball bearing seat, 527, ball screw, 528, linear guide rail, 529, slide plate;

[0045] 531, servo motor B, 532, planetary gear reducer, 533, reducer connecting seat, 534, coupling, 535, deep groove ball bearing, 536, worm, 537, worm wheel, 538, bearing seat, 539, turntable bearing, 5310, rotating body, 5311, cylindrical roller bearing, 5312, hydraulic rotary joint, 5313, housing, 5314, bottom plate;

[0046] 541, rear cover, 542, piston, 543, outer sleeve, 544, anti-rotation block;

[0047] 551. roller frame, 552. roller shaft, 553. bearing, 554. roller, 555. roller shaft locking plate, 556. main body, 557. tool head. DETAILED DESCRIPTION

[0048] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings, but is not limited thereto.

[0049] Embodiment 1:

[0050] like Figure 1-8 As shown, this embodiment provides a deep rolling machine for shaft parts, including a machine bed 1, a spindle box 2, a tailstock 3, a Z-axis longitudinal feed mechanism 4 and a rolling device 5, wherein the spindle box 2 and the tailstock 3 are respectively arranged at both ends of the machine bed 1, the Z-axis longitudinal feed mechanism 4 is arranged on the front side of the machine bed 1, and the rolling device 5 is arranged on the Z-axis longitudinal feed mechanism 4;

[0051] The machine tool bed 1, the spindle box 2, the tailstock 3, and the Z-axis longitudinal feed mechanism 4 are all existing equipment and will not be described in detail.

[0052] The rolling device 5 includes a carriage 51, an X-axis feeding mechanism 52, a B-axis rotating mechanism 53, a hydraulic cylinder telescopic mechanism 54 and a rolling mechanism 55. The lower side of the carriage 51 is connected to the Z-axis longitudinal feeding mechanism 4, the X-axis feeding mechanisms 52 are symmetrically arranged on both sides of the carriage 51, the B-axis rotating mechanism 53 is arranged on the X-axis feeding mechanism 52, a plurality of hydraulic cylinder telescopic mechanisms 54 are arranged in the B-axis rotating mechanism 53, and a rolling mechanism 55 is arranged on the hydraulic cylinder telescopic mechanism 54.

[0053] When the workpiece is clamped between the spindle box and the tailstock, the rolling devices on both sides of the support plate are respectively located on both sides of the workpiece, and the rolling mechanisms on both sides contact the surface of the workpiece for rolling processing. When the workpiece surface has an arc surface, a cylindrical surface and a conical surface, the rolling mechanism can achieve the normal processing of the workpiece surface by the rolling mechanism at all times with the help of the linkage of the Z-axis longitudinal feed mechanism (moving parallel to the axis of the workpiece), the X-axis feed mechanism (moving perpendicular to the axis of the workpiece), and the B-axis rotation mechanism.

[0054] The X-axis feed mechanism 52 includes a linear slide 528, a servo motor A521, a planetary gear reducer 522, a coupling 524, a tapered roller bearing seat 525, a deep groove ball bearing seat 526, a ball screw 527 and a slide plate 529. A planetary gear reducer 522 is arranged on one side of the slide plate 51 through a reducer connecting seat 523. The input side of the planetary gear reducer 522 is connected to the servo motor A521, and the output side is connected to the ball screw 527 through a coupling 524. Both ends of the ball screw 527 are arranged on the slide plate 51 through a tapered roller bearing seat 525 and a deep groove ball bearing seat 526 respectively. Linear slides 528 are arranged on the slide plate on both sides of the ball screw 527 respectively. A slide plate 529 is arranged on the ball screw 527 and the linear slide 528, and a B-axis rotation mechanism 53 is arranged on the slide plate 529.

[0055] The rotary motion output by the servo motor A is converted into linear motion through the ball screw and linear guide rail. The linear motion has high precision, the servo positioning is accurate, and the output torque is large, ensuring the stability and accuracy of the rolling process.

[0056] The B-axis rotating mechanism 53 includes a servo motor B531, a planetary gear reducer 532, a coupling 534, a worm wheel 537, a worm 536, a rotating body 5310, a housing 5313 and a base plate 5314, wherein the housing 5313 is fixedly arranged on the base plate 5314, a planetary gear reducer 532 is arranged on the outer side of the top of the housing 5313 through a reducer connecting seat 533, the input side of the planetary gear reducer 532 is connected to the servo motor B531, and the output side is connected to the worm 536 through a coupling 534, and both ends of the worm 536 are fixed in the housing 5313 through a bearing seat 538 and a deep groove ball bearing 535, and the worm 536 is connected to the housing 5313 through a worm connecting seat 533. The wheel 537 is connected to the rotating body 5310, the lower part of the rotating body 5310 is fixed to the base plate 5314 through the turntable bearing 539, and the upper part of the rotating body 5310 is fixed to the shell 5313 through the cylindrical roller bearing 5311. A plurality of hydraulic cylinder telescopic mechanisms 54 are arranged around the middle part of the rotating body 5310, and the number of the hydraulic cylinder telescopic mechanisms can be determined according to the required rolling mechanism model. The shell on the outer side of the middle part of the rotating body 5310 is hollowed out to facilitate the extension of the hydraulic cylinder telescopic mechanism. After the two sets of rotating mechanisms with perpendicular axes transmit motion through the worm gear, the rotation accuracy is high and the load-bearing capacity is large, which greatly improves the stability of the machine tool during processing and realizes automatic switching of the rolling mechanism.

[0057] The hydraulic cylinder telescopic mechanism 54 includes an outer sleeve 543, a piston 542 and a rear cover 541. The rear cover 541 is fixedly arranged on one side of the outer sleeve 543. The rear cover 541 is externally connected to a hydraulic pipeline. The piston 542 is slidably arranged in the outer sleeve 543. A rolling mechanism is arranged on the outer side of the piston 542 through an anti-rotation block 544. The piston is positioned by the anti-rotation block to prevent the center of the circle from rotating during movement.

[0058] The rolling mechanism 55 includes a roller frame 551, a roller shaft 552, a bearing 553 and a roller 554. The roller frame 551 is fixed to the outside of the piston 542. The outside of the roller frame 551 is a U-shaped groove. The roller shaft 552 is fixed to both sides of the U-shaped groove. The roller 554 is sleeved on the outside of the roller shaft 552 through two bearings 553. An adjustment pad is provided between the two bearings 553. The whole mechanism can realize the rapid replacement of the roller.

[0059] The application of the above-mentioned deep rolling machine for shaft parts is as follows:

[0060] (1) The workpiece is installed between the spindle box and the tailstock, and the Z-axis longitudinal feed mechanism moves to bring the rolling mechanism to the preset processing position of the workpiece;

[0061] (2) The B-axis rotation mechanism moves, selects the rolling mechanism corresponding to the processing size, rotates it to be perpendicular to the workpiece axis, fills the hydraulic cylinder telescopic mechanism with oil, extends the piston, and then starts the X-axis feed mechanism to move forward, pushing the rolling mechanism onto the workpiece, and the piston is compressed back a certain distance to achieve flexible contact between the rolling mechanism and the workpiece;

[0062] The cooperation between the hydraulic cylinder telescopic mechanism and the X-axis feeding mechanism ensures that the rolling mechanism and the workpiece are in flexible contact with small pressure, and ensures that the rolling mechanism and the workpiece are in full contact without damaging the workpiece.

[0063] (3) The machine tool is started and the workpiece is rolled. When the workpiece is processed to a curved or other irregular surface, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, the X-axis feed mechanism is retracted, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, and the rolling mechanism is separated from the workpiece. Then the servo motor B is started, and the position of the rotating body is adjusted through the worm and worm gear, and then the normal position of the rolling mechanism and the workpiece is adjusted. Then the rolling process is performed until the entire workpiece is processed. This process can also realize continuous processing, that is, the Z-axis feed mechanism, the X-axis feed mechanism and the B-axis rotation mechanism are linked to perform continuous normal processing on the irregular surface.

[0064] If it is necessary to replace a rolling mechanism of a different type, adjust the position of the rotating body, adjust the rolling mechanism of the corresponding type to the outside, corresponding to the workpiece working surface, and then cooperate with the hydraulic cylinder telescopic mechanism and the X-axis feed mechanism to make the rolling mechanism press the workpiece. After reaching the preset pressure, continue the rolling process.

[0065] Embodiment 2:

[0066] A deep rolling machine for shaft parts, the structure is as described in Example 1, except that a hydraulic rotary joint 5312 is provided at the top of the rotating body 5310, and the external hydraulic pipeline is connected to the rear cover 541 through the hydraulic rotary joint 5312 and the hydraulic pipeline inside the rotating body 5310. The hydraulic rotary joint ensures that the hydraulic pipeline is not affected by the rotation.

[0067] Embodiment 3:

[0068] A deep rolling machine for shaft parts has a structure as described in Example 1, except that a roller shaft locking plate 555 is provided on the lower side of the roller frame 551, and the roller shaft and bearing are pre-tightened during installation by the roller shaft locking plate. The roller frame 551 is embedded in the groove on the outer side of the piston 542 through a protrusion and is fixed by a flat key. The flat key can be used to prevent the roller from rotating and play a guiding role.

[0069] Embodiment 4:

[0070] A deep rolling machine for shaft parts, the structure of which is as described in Example 1, except that the rolling mechanism is an ultrasonic rolling device, such as Figure 9-10 As shown, the ultrasonic rolling device is an existing device, which includes a main body 556 for accommodating an ultrasonic generating part and loading a tool head 557, and a tool head 557 for processing.

[0071] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A deep rolling machine for shaft parts, characterized in that: It includes a machine bed, a spindle box, a tailstock, a Z-axis longitudinal feed mechanism and a rolling device, wherein the spindle box and the tailstock are respectively arranged at both ends of the machine bed, the Z-axis longitudinal feed mechanism is arranged at the front side of the machine bed, and the upper part of the Z-axis longitudinal feed mechanism is connected with the rolling device; The rolling device includes a carriage, an X-axis feeding mechanism, a B-axis rotating mechanism, a hydraulic cylinder telescopic mechanism and a rolling mechanism. The lower side of the carriage is connected to the Z-axis longitudinal feeding mechanism, the X-axis feeding mechanisms are symmetrically arranged on both sides of the carriage, the B-axis rotating mechanism is arranged on the X-axis feeding mechanism, a number of hydraulic cylinder telescopic mechanisms are arranged in the B-axis rotating mechanism, and a rolling mechanism is arranged on the hydraulic cylinder telescopic mechanism.

2. The deep rolling machine for shaft parts according to claim 1, characterized in that: The X-axis feed mechanism includes a linear slide, a servo motor A, a planetary gear reducer, a coupling, a tapered roller bearing seat, a deep groove ball bearing seat, a ball screw and a slide plate. A planetary gear reducer is arranged on one side of the slide plate, the input side of the planetary gear reducer is connected to the servo motor A, and the output side is connected to the ball screw through a coupling. Both ends of the ball screw are arranged on the slide plate through a tapered roller bearing seat and a deep groove ball bearing seat respectively, linear slides are arranged on the slide plate on both sides of the ball screw, slide plates are arranged on the ball screw and the linear slides, and a B-axis rotation mechanism is arranged on the slide plate.

3. The deep rolling machine for shaft parts according to claim 2, characterized in that: The B-axis rotating mechanism includes a servo motor B, a planetary gear reducer, a coupling, a worm wheel, a worm, a rotating body, a shell and a base plate, wherein a shell is fixedly arranged on the base plate, a planetary gear reducer is arranged on the outer side of the top of the shell, the input side of the planetary gear reducer is connected to the servo motor B, and the output side is connected to the worm through a coupling, both ends of the worm are fixed in the shell through a bearing seat and a deep groove ball bearing respectively, the worm is connected to the rotating body through a worm wheel, the lower part of the rotating body is fixed to the base plate through a turntable bearing, the upper part of the rotating body is fixed in the shell through a cylindrical roller bearing, a number of hydraulic cylinder telescopic mechanisms are arranged around the middle part of the rotating body, and the shell outside the middle part of the rotating body is hollow.

4. The deep rolling machine for shaft parts according to claim 3, characterized in that: The hydraulic cylinder telescopic mechanism includes an outer sleeve, a piston and a rear cover. The rear cover is fixedly arranged on one side of the outer sleeve, and the rear cover is externally connected to a hydraulic pipeline. A piston is slidably arranged in the outer sleeve, and a rolling mechanism is arranged on the outer side of the piston through an anti-rotation block.

5. The deep rolling machine for shaft parts according to claim 4, characterized in that: A hydraulic rotary joint is arranged at the top of the rotating body, and an external hydraulic pipeline is connected to the rear cover through the hydraulic rotary joint and the hydraulic pipeline inside the rotating body.

6. The deep rolling machine for shaft parts according to claim 4, characterized in that: The rolling mechanism includes a roller frame, a roller shaft, a bearing and a roller. The roller frame is fixed to the outside of the piston. The outside of the roller frame is a U-shaped groove. The roller shaft is fixed to both sides of the U-shaped groove. The roller is mounted on the outside of the roller shaft through two bearings. An adjustment pad is arranged between the two bearings.

7. The deep rolling machine for shaft parts according to claim 6, characterized in that: A roller shaft locking plate is arranged at the lower side of the roller frame, and the roller frame is embedded in the groove on the outer side of the piston through the protrusion and fixed by a flat key.

8. The deep rolling machine for shaft parts according to claim 4, characterized in that: The rolling mechanism is an ultrasonic rolling device.

9. The application of the deep rolling machine for shaft parts as claimed in claim 4, characterized in that: Here are the steps: (1) The workpiece is installed between the spindle box and the tailstock, and the Z-axis longitudinal feed mechanism moves to bring the rolling mechanism to the preset processing position of the workpiece; (2) The B-axis rotation mechanism moves, selects the rolling mechanism corresponding to the processing size, rotates it to be perpendicular to the workpiece axis, fills the hydraulic cylinder telescopic mechanism with oil, extends the piston, and then starts the X-axis feed mechanism to move forward, pushing the rolling mechanism onto the workpiece, and the piston is compressed back a certain distance to achieve flexible contact between the rolling mechanism and the workpiece; (3) The machine tool is started and the workpiece is rolled. When the workpiece is processed to a curved surface or other special-shaped surface, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, the X-axis feed mechanism retreats, the hydraulic cylinder telescopic mechanism is de-oiled, the piston is retracted, and the rolling mechanism is separated from the workpiece. Then, the servo motor B is started, and the position of the rotating body is adjusted through the worm and worm gear, thereby adjusting the normal position of the rolling mechanism and the workpiece. Then, the rolling process is performed until the entire workpiece is processed.

10. The application of the deep rolling machine for shaft parts as claimed in claim 9, characterized in that: In step (3), if it is necessary to replace a rolling mechanism of a different model, adjust the position of the rotating body, adjust the rolling mechanism of the corresponding model to the outside, corresponding to the workpiece working surface, and then cooperate with the hydraulic cylinder telescopic mechanism and the X-axis feed mechanism to make the rolling mechanism press the workpiece. After reaching the preset pressure, continue the rolling process.

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