Transmission shaft machining device

Abstract

The invention relates to the technical field of machining, in particular to a transmission shaft machining device which comprises a fixing frame, a sliding rail, a three-jaw chuck, a displacement block, a machining mechanism, a milling unit and an automatic start-stop unit. According to the invention, the following problems existing in the process of milling a workpiece in the prior art can be solved: automatic start and stop of the milling cutter cannot be controlled, so that the milling cutter needs to continuously operate in the whole machining period, energy waste is caused, and equipment wear is easy to aggravate; chippings in a milling groove cannot be removed, so that the milling precision is influenced; the tool apron can be automatically opened and automatically closed after the milling cutter is completely retracted, so that energy waste and abrasion caused by long-term idling of equipment are avoided; by means of the rolling brush in the rotating state, residual milling chippings in the spiral groove can be brushed away, unsmoothness of the spiral groove caused by the fact that a milling cutter makes contact with the milling chippings in the retracting process is avoided, and then the milling precision is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a transmission shaft processing device. BACKGROUND

[0002] As a core component of torque transmission and rotation in mechanical equipment, the transmission shaft is widely used in the fields of automobile, engineering machinery, ship, aerospace, etc. In order to realize specific functions, helical grooves such as oil groove, spline groove, weight-reducing groove, etc. are milled on the cylindrical outer surface of the transmission shaft. The machining precision and surface quality of the helical groove directly affect the carrying capacity, fatigue life, lubrication effect and overall performance of the transmission shaft.

[0003] With the development of science and technology, the technical personnel in the relevant field have also optimized the milling processing device a lot. In order to make more accurate comparison, a kind of milling processing device is disclosed in the Chinese patent with the publication number CN107020408A, which is used on a milling machine. The milling machine is provided with a spindle mounting portion, a spindle is installed on the spindle mounting portion, and a milling cutter is installed on the spindle. The milling processing device includes an online electric pulse processing device. Before the milling cutter mills the workpiece, the online electric pulse processing device is used to process the workpiece in the area to be processed, so as to improve the machining performance of the area to be processed. The required force for milling can be reduced, the surface quality of the workpiece can be improved, and the tool wear can be reduced.

[0004] However, the above-mentioned prior art still has some deficiencies in the process of milling the workpiece: 1. When the above-mentioned prior art uses the milling cutter to mill the workpiece, it cannot control the automatic opening of the milling cutter before milling and the automatic closing after milling, so that the milling cutter needs to be continuously running in the whole processing cycle. However, the actual effective metal cutting time, i.e. the time when the milling cutter contacts the workpiece and removes the material, only accounts for a part of the whole processing cycle. Therefore, the idling of the milling cutter will cause energy waste, and the long-term idling of the milling cutter will easily cause wear.

[0005] 2. In the process of milling, the milling chips will be left in the milling groove on the surface of the workpiece. However, the above-mentioned prior art cannot remove the chips in the milling groove, which will cause the milling groove to be not smooth in the process of withdrawing the tool due to the contact with the chips, thereby affecting the milling precision.

[0006] Therefore, under the above-mentioned viewpoints, there is still room for improvement in the existing milling processing means. SUMMARY

[0007] In order to solve the above problems, the present application provides a kind of transmission shaft processing device, including two parallel fixed frame, two fixed frame are installed with slide rail by support, one support upper end is installed with three jaw chuck for clamping the transmission shaft to be processed by positioning seat, positioning motor for driving three jaw chuck rotation is installed on positioning seat by motor bracket, two displacement blocks are symmetrically sleeved on slide rail along the width direction, and the processing mechanism is arranged on the upper end of the two displacement blocks, the processing mechanism includes the mounting block installed on the upper end of the two displacement blocks, the milling unit for processing transmission shaft is arranged on the mounting block, and the automatic start-stop unit for controlling the start-stop of milling unit is installed on the mounting block, to improve the processing efficiency, and save energy.

[0008] As a preferred technical solution of the present application, the side wall of one of the fixed frames is provided with a control box, two lead screws are symmetrically installed between the control box and the other fixed frame, the lead screws pass through the displacement blocks by threaded connection, and two guide columns symmetrically arranged between the control box and the other fixed frame slide through the displacement blocks.

[0009] As a preferred technical solution of the present application, the milling unit includes a tool holder rotatably arranged on the mounting block near the positioning seat, two milling cutters are symmetrically installed on the tool holder by detachable manner, and an arc-shaped protective cover is arranged on the upper end of the two displacement blocks and covers the outside of the tool holder.

[0010] As a preferred technical solution of the present application, the milling unit further includes a drive motor arranged on the upper end of the mounting block by a motor base, a belt pulley is installed on the output shaft of the drive motor, a protective shell is arranged on the upper end of the mounting block and covers the outside of the belt pulley, a hollow shaft rotatably arranged in the mounting block is installed on the side of the tool holder away from the positioning seat, a through hole is formed on the side of the mounting block away from the positioning seat, and the belt pulley and the hollow shaft are connected by belt transmission.

[0011] As a preferred technical solution of the present application, two installation grooves are symmetrically formed on the side of the tool holder away from the hollow shaft, a sleeve is arranged in the installation groove by detachable manner, and a milling cutter is installed in the sleeve.

[0012] As a preferred technical solution of the present application, the automatic start-stop unit includes two through holes symmetrically formed on the arc-shaped protective cover, a fixed sleeve is installed on both sides of the through hole, a displacement column is arranged in the through hole and the fixed sleeve, an actuator is arranged on the end of the displacement column close to the axis of the arc-shaped protective cover, and a force sensing element is installed on the end of the displacement column away from the force sensing element.

[0013] As a preferred technical scheme of the present application, the execution member comprises an extension rod mounted on the displacement column near one end of the axis of the arc-shaped protective cover, and the end of the extension rod away from the displacement column is provided with a contact roller through an axle bracket, and the side of the displacement column near the extension rod is provided with a positioning ring, and a support spring is arranged between the positioning ring and the fixed sleeve and surrounds the outside of the displacement column.

[0014] As a preferred technical scheme of the present application, the side of the axle bracket near the positioning seat is provided with an inclined guide plate through a connecting plate, the side of the inclined guide plate away from the contact roller is inclined to the side away from the axis of the arc-shaped protective cover, and the side of the inclined guide plate near the contact roller is tangent to the contact roller.

[0015] As a preferred technical scheme of the present application, the stress sensing member comprises a support bracket mounted on the outer wall of the fixed sleeve outside the arc-shaped protective cover, the support bracket is located outside the displacement column, and the end of the displacement column and the support bracket are respectively provided with an electrode sheet and an electrode pad matched with each other, the upper end of the mounting block is provided with a controller, the controller is electrically connected with the electrode pad, and the controller is electrically connected with the driving motor.

[0016] As a preferred technical scheme of the present application, the electrode sheet and the electrode pad are close to each other but have a certain distance, and the distance between the electrode sheet and the electrode pad is smaller than the distance between the fixed sleeve and the positioning ring.

[0017] In summary, the present application has the following beneficial technical effects: Firstly, the contact roller in contact with the transmission shaft or other workpieces to be machined can be self-adapted to give way to the outside according to the outer contour of the transmission shaft, so as to realize the automatic opening of the tool holder in cooperation with the stress sensing member; after the displacement block drives the contact roller to separate from the transmission shaft, the support spring controls the displacement column to drive the extension rod and the contact roller to reset as a whole, at this time, the stress sensing member can realize the automatic closing of the tool holder after complete tool withdrawal, so as to avoid causing tool withdrawal interference, and can control the automatic start and stop of the tool holder according to the machining requirements, so as to avoid energy waste and wear caused by long-term idling of the equipment.

[0018] Secondly, the contact roller drives the extension rod, the displacement column and the electrode sheet to move as a whole to the side away from the axis of the arc-shaped protective cover, the displacement column drives the electrode sheet to contact the electrode pad and transmit a signal to the controller, so that the controller makes the driving motor start and drive the tool holder to rotate; if the diameter of the transmission shaft is large, the contact roller can continue to expand outward as needed, so as to avoid causing interference, ensure the rationality of the structure, and adapt to the milling of transmission shafts or other workpieces of different diameters.

[0019] Thirdly, the milling chips and the cooling liquid mixture generated in the milling process are discharged downward through the discharging hole into the collecting hopper for filtering, so as to reuse the filtered cooling liquid, improve the resource recycling rate, and reduce the cost.

[0020] Fourthly, the cutter holder drives the rotating shaft, the linkage shaft and the gear to move synchronously in the circumferential direction, the gear drives the rolling brush to rotate synchronously through the linkage shaft and the rotating shaft, the rolling brush can brush away the residual milling chips in the spiral groove while rotating, avoids the residual milling chips from causing the milling cutter to contact with the milling chips during the tool retracting process, and causes the spiral groove to be not smooth, and further ensures the precision of the milling process. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described below in combination with the drawings and examples.

[0022] Figure 1 is the first structural schematic diagram of the application.

[0023] Figure 2 is the second structural schematic diagram of the application.

[0024] Figure 3 is the first structural schematic diagram of the milling unit of the application.

[0025] Figure 4 is the structural schematic diagram between the cutter holder and the milling cutter of the application.

[0026] Figure 5 is the second structural schematic diagram of the milling unit of the application.

[0027] Figure 6 is the structural schematic diagram between the milling unit and the automatic start-stop unit of the application.

[0028] Figure 7 is the A partial enlarged view of the application. Figure 6

[0029] Figure 8 is the structural schematic diagram between the collecting hopper, the guide plate and the intercepting filter screen of the application.

[0030] Figure 9 is the structural schematic diagram between the mounting block and the cutter holder of the application.

[0031] Figure 10 is the B partial enlarged view of the application. Figure 9

[0032] ​​In the figure, 1, fixed frame; 11, control box; 12, screw rod; 13, guide column; 14, blanking hole; 15, steel brush; 16, collecting hopper; 17, guide plate; 18, intercepting filter screen; 2, support; 3, slide rail; 4, positioning seat; 41, three-jaw chuck; 42, positioning motor; 5, displacement block; 6, machining mechanism; 61, mounting block; 62, milling unit; 621, tool holder; 622, milling cutter; 623, arc-shaped protective cover; 624, bamboo joint pipe; 625, driving motor; 626, pulley; 627, protective shell; 628, hollow shaft; 629, through hole; 63, automatic start-stop unit; 631, fixed sleeve; 632, displacement column; 633, execution member; 634, force sensing member; 635, extension rod; 636, shaft support; 637, contact roller; 638, positioning ring; 639, supporting spring; 640, connecting plate; 641, inclined guide plate; 642, support frame; 643, electrode sheet; 644, electrode pad; 645, controller; 651, support frame; 652, rotating shaft; 653, rolling brush; 654, linkage shaft; 655, gear; 656, gear ring. DETAILED DESCRIPTION

[0033] The following will be described in detail in combination with the accompanying Figures 1-10 The embodiments of the present application are described in detail.

[0034] The embodiments of the present application disclose a transmission shaft machining device. It should be noted that the transmission shaft machining device of the present application is mainly applied to the process of milling the transmission shaft. In terms of technical effect, the automatic opening of the tool holder 621 can be realized, and the tool holder 621 is automatically closed after complete tool withdrawal. In this way, the automatic start-stop of the tool holder 621 can be controlled according to the processing requirements, energy waste is avoided, and wear caused by long-term idling of the equipment is avoided. In particular, during the milling process, the mixture of milling chips and cooling liquid can be collected, and the filtered cooling liquid can be reused, thereby improving resource recycling rate and reducing cost. Further, the transmission shaft machining device of the present application can also brush off the milling chips remaining in the spiral groove milled on the outer wall of the transmission shaft, so that the remaining milling chips do not cause the spiral groove to be not smooth due to contact with the milling chips during tool withdrawal, thereby ensuring the precision of the milling process.

[0035] Embodiment one: refer to Figure 1 and Figure 2As shown, a kind of transmission shaft processing device, including two parallelly arranged fixed frame 1, two fixed frame 1 between through support 2 install slide rail 3, one support 2 upper end is installed for clamping the three-jaw chuck 41 of the transmission shaft to be processed through positioning seat 4, positioning seat 4 is installed on the motor bracket for the positioning motor 42 for driving three-jaw chuck 41 rotation, slide rail 3 is symmetrically slid on the width direction and is equipped with two displacement blocks 5, the upper end of two displacement blocks 5 is provided with processing mechanism 6 in common, fixed frame 1, slide rail 3, positioning seat 4, three-jaw chuck 41, positioning motor 42, displacement block 5 and processing mechanism 6 constitute milling machine, processing mechanism 6 includes the mounting block 61 installed on the upper end of two displacement blocks 5, the milling unit 62 for processing transmission shaft is provided on the mounting block 61, and the automatic start-stop unit 63 for controlling the start-stop of milling unit 62 is installed on the mounting block 61, for improving processing efficiency, and saving energy.

[0036] Further, in the present embodiment, in order to facilitate the automatic processing of transmission shaft by processing mechanism 6, the displacement block 5 can drive the processing mechanism 6 to move along the slide rail 3 in the present embodiment, specifically, the side wall of one of the fixed frame 1 is provided with a control box 11, the control box 11 is symmetrically rotatably installed between the other fixed frame 1 and the two lead screws 12, the lead screws 12 pass through the displacement block 5 by threaded connection, and the control box 11 and the other fixed frame 1 are symmetrically provided with two guide columns 13 sliding through the displacement block 5, it should be noted that the control box 11 is prior art, and the lead screw 12 can be driven according to programming, in addition, the guide column 13 can limit the rotation direction of the displacement block 5, when the lead screw 12 rotates, the displacement block 5 can only move along the axis direction of the guide column 13.

[0037] In the specific implementation process, first, the transmission shaft to be processed is fixedly installed on the three-jaw chuck 41, then the lead screw 12 is driven to rotate by the control box 11, the lead screw 12 drives the displacement block 5 to slide along the slide rail 3 when rotating, so that the displacement block 5 drives the processing mechanism 6 to move to the side close to the transmission shaft to be processed; during this period, the positioning motor 42 is started, the three-jaw chuck 41 and the transmission shaft to be processed are driven to rotate slowly by the positioning motor 42, then the milling unit 62 is driven to mill the transmission shaft by the processing mechanism 6, for milling helical grooves on the outer wall of the transmission shaft according to the processing requirement.

[0038] Reference Figure 3 , Figure 4 and Figure 5As shown, in order to facilitate the milling of the transmission shaft, a corresponding milling unit 62 is provided in the embodiment, specifically, the milling unit 62 includes a tool holder 621 rotatably arranged on the mounting block 61 near the positioning seat 4, two milling cutters 622 are symmetrically mounted on the tool holder 621 in a detachable manner, an arc-shaped protective cover 623 covering the outside of the tool holder 621 is arranged at the upper end of the two displacement blocks 5, and a bamboo joint pipe 624 for discharging cooling liquid to the tool holder 621 is mounted on the upper end of the mounting block 61.

[0039] Further, in the embodiment, the milling unit 62 further includes a driving motor 625 arranged on the upper end of the mounting block 61 through a motor base, a belt pulley 626 is mounted on the output shaft of the driving motor 625, a protective shell 627 covering the outside of the belt pulley 626 is arranged on the upper end of the mounting block 61, a hollow shaft 628 rotatably penetrating the inside of the mounting block 61 is mounted on the side of the tool holder 621 away from the positioning seat 4, a through hole 629 is formed on the side of the mounting block 61 away from the positioning seat 4, and the belt pulley 626 and the hollow shaft 628 are connected through belt transmission.

[0040] In the specific implementation process, when the displacement block 5 drives the mounting block 61 to move towards the side close to the transmission shaft to be machined, the driving motor 625 is started, the driving motor 625 drives the hollow shaft 628 and the tool holder 621 to rotate quickly through the belt pulley 626, and the tool holder 621 drives the milling cutter 622 to move circumferentially; when the transmission shaft to be machined penetrates the tool holder 621, the milling cutter 622 moving circumferentially can mill a helical groove on the outer wall of the transmission shaft in cooperation with the slowly rotating transmission shaft, during which, the cooling liquid is discharged between the milling cutter 622 and the transmission shaft through the bamboo joint pipe 624 to avoid overheating of the milling cutter 622 affecting the milling stability; the transmission shaft penetrates the hollow shaft 628 and the through hole 629 in turn during the milling process, so that the displacement block 5 can drive the mounting block 61 and the tool holder 621 as a whole to move to the side of the positioning seat 4.

[0041] In addition, the speed of the milling cutter 622 can be adjusted by adjusting the speed of the driving motor 625, so that the machining can be adaptively adjusted according to the machining requirements, and the machining stability and precision are ensured.

[0042] It should be noted that two mounting grooves are symmetrically formed on the side of the tool holder 621 away from the hollow shaft 628, a sleeve is arranged in the mounting groove in a detachable manner, and the milling cutter 622 is mounted in the sleeve; so as to replace different types of milling cutters 622 in the sleeve, and process different types of helical grooves on the outer wall of the transmission shaft.

[0043] Reference Figure 6 and Figure 7As shown in the figure, in order to avoid unnecessary energy waste and equipment wear and tear, the tool seat 621 can be automatically rotated and automatically closed in this embodiment, and based on this, the automatic start-stop unit 63 is also provided in this embodiment. Specifically, the automatic start-stop unit 63 includes two through holes symmetrically formed on the arc-shaped protective cover 623, and the through holes are both provided with a fixed sleeve 631. The through hole and the fixed sleeve 631 are both provided with a displacement column 632, and the displacement column 632 is provided with an actuator 633 near the axis of the arc-shaped protective cover 623. The displacement column 632 is provided with a force sensing element 634 away from the force sensing element 634.

[0044] Further, in this embodiment, the actuator 633 includes an extension rod 635 mounted on the displacement column 632 near the axis of the arc-shaped protective cover 623. The extension rod 635 is provided with a contact roller 637 through a shaft support 636 away from the displacement column 632. The displacement column 632 is provided with a positioning ring 638 near the extension rod 635. The positioning ring 638 and the fixed sleeve 631 are provided with a support spring 639 sleeved on the displacement column 632. The support spring 639 always provides a pushing force between the positioning ring 638 and the extension rod 635 towards the side of the axis of the arc-shaped protective cover 623, so that the two displacement columns 632 drive the two contact rollers 637 to be closest in the initial state.

[0045] It should be noted that in order to avoid the two contact rollers 637 with close distance from preventing the transmission shaft to be machined from penetrating into the tool seat 621, the inclined guide plate 641 is installed on the side of the shaft support 636 near the positioning seat 4 through the connecting plate 640. The inclined guide plate 641 is inclined away from the axis of the arc-shaped protective cover 623 on the side away from the contact roller 637. The side of the inclined guide plate 641 near the contact roller 637 is tangent to the contact roller 637. Through the inclined guide plate 641, the transmission shaft or other workpieces with a diameter greater than the distance between the two contact rollers 637 can be guided, so that when the transmission shaft needs to penetrate into the tool seat 621, the two contact rollers 637 can be squeezed to both sides through the inclined guide plate 641, thereby ensuring that the two contact rollers 637 smoothly abut against the outer wall of the transmission shaft.

[0046] In the implementation process, when the displacement block 5 drives the mounting block 61 to move towards the side close to the transmission shaft to be machined, the moving block drives the arc-shaped protective cover 623 to move synchronously, the arc-shaped protective cover 623 drives the extension rod 635 and the contact roller 637 to move as a whole through the displacement column 632, and the contact roller 637 is abutted against the outer wall of the transmission shaft to be machined under the action of the inclined guide plate 641; then the contact roller 637 is adaptively deflected to the side away from the axis of the arc-shaped protective cover 623 according to the outer contour of the transmission shaft, and the contact roller 637 drives the extension rod 635 to move synchronously, at this time, the supporting spring 639 is contracted under stress, so that the displacement column 632 cooperates with the stress sensing part 634 to make the driving motor 625 connected to the power and start, and drives the tool seat 621 to rotate at high speed, so as to realize the automatic opening of the tool seat 621.

[0047] After the transmission shaft milling machining is completed, the displacement block 5 drives the mounting block 61 to move to the side away from the positioning seat 4 to retreat the tool, and the tool seat 621 still needs to rotate during the tool retreat process; when the mounting block 61 drives the contact roller 637 to be separated from the transmission shaft, the supporting spring 639 drives the extension rod 635 and the contact roller 637 to move to the side close to the axis of the arc-shaped protective cover 623 through the positioning ring 638 to reset, at this time, the displacement column 632 cooperates with the stress sensing part 634 to close the driving motor 625, so as to realize the automatic closing of the tool seat 621 after the complete tool retreat, avoid the tool retreat interference, and control the automatic start and stop of the tool seat 621 according to the machining requirement, so as to avoid the energy waste and the abrasion caused by the long-term idling of the equipment.

[0048] Continuing to refer to Figure 6 and Figure 7 shown, in order to accurately realize the automatic start and stop of the tool seat 621, in the embodiment, the stress sensing part 634 includes a support frame 642 installed on the outer wall of the fixed sleeve 631 outside the arc-shaped protective cover 623, the support frame 642 is located outside the displacement column 632, and the electrode sheet 643 and the electrode pad 644 are arranged between the end of the displacement column 632 and the support frame 642, respectively, the upper end of the mounting block 61 is provided with a controller 645, the controller 645 is electrically connected with the electrode pad 644, and the controller 645 is electrically connected with the driving motor 625; the controller 645 used in the embodiment is a prior art, mainly used for receiving the electric signal generated when the electrode pad 644 contacts with the electrode sheet 643, and controlling the start and stop of the driving motor 625, in addition, the extension rod 635 is slidably arranged in the displacement column 632, and the extension rod 635 and the displacement column 632 have elastic members (not shown in the figure) inside, the elastic members can push the extension rod 635 out of the displacement column 632, and the extension rod 635 can be contracted into the displacement column 632 under stress.

[0049] Further, in the embodiment, the electrode sheet 643 and the electrode pad 644 are close to each other but have a certain distance, and the distance between the electrode sheet 643 and the electrode pad 644 is smaller than the distance between the fixed sleeve 631 and the positioning ring 638.

[0050] In the specific implementation process, when the transmission shaft to be machined passes between the two contact rollers 637, the contact roller 637 drives the displacement column 632 and the electrode sheet 643 as a whole to move away from the axis of the arc-shaped protective cover 623 to one side, and then the electrode sheet 643 contacts the electrode pad 644 and transmits a signal to the controller 645, so that the controller 645 makes the driving motor 625 start to work and drives the tool holder 621 to rotate; at the same time, the displacement column 632 cannot continue to move after the electrode sheet 643 contacts the electrode pad 644, if the diameter of the transmission shaft is larger, the contact roller 637 needs to continue to expand outward, at this time the contact roller 637 drives the extension rod 635 to retract into the displacement column 632, so as to avoid the interference caused by the contact roller 637 unable to expand as required, ensure the rationality of the structure, and adapt to the milling machining of transmission shafts or other workpieces with different diameters.

[0051] After the transmission shaft machining is completed and the tool holder 621 drives the milling cutter 622 to retreat and complete, the contact roller 637 is separated from the surface of the transmission shaft, the supporting spring 639 is reset and drives the displacement column 632 to reset through the positioning ring 638, the displacement column 632 drives the electrode sheet 643 to separate from the electrode pad 644, so as to disconnect the signal transmission to the controller 645, so that the controller 645 makes the driving motor 625 power off and close, so as to realize the automatic closing of the tool holder 621, at the same time, the extension rod 635 drives the contact roller 637 to reset under the action of the elastic member.

[0052] Embodiment two: refer to Figure 8 As shown in the embodiment, on the basis of the embodiment one, since cooling liquid needs to be poured at the milling cutter 622 during milling, and the cooling liquid and milling chips are easy to fall on the slide rail 3 and difficult to clean, in order to solve the problem, in the embodiment, two slide rails 3 are symmetrically arranged between the two fixed frames 1 through the support 2, and the two slide rails 3 form a discharging hole 14 therebetween, the displacement block 5 has two and is slidably sleeved on the outer walls of the two slide rails 3, and the outer wall of the displacement block 5 is provided with two steel brushes 15 for scraping off the chips on the surface of the slide rail 3.

[0053] Further, in the embodiment, a collecting hopper 16 is installed between the two fixed frames 1 below the lead screw 12, guide plates 17 are installed on the inner walls of the two sides of the collecting hopper 16 in the length direction, and an intercepting filter screen 18 is slidably arranged in the collecting hopper 16, and the intercepting filter screen 18 is located below the guide plates 17.

[0054] In the specific implementation process, the mixture of the milling debris and the cooling liquid generated in the milling process is discharged downward through the discharging hole 14 into the collecting hopper 16, and the mixture is filtered under the action of the intercepting screen 18, so that the milling debris is left on the upper end of the intercepting screen 18, and the filtered cooling liquid is collected at the bottom of the collecting hopper 16, so as to facilitate the reuse of the cooling liquid, improve the resource recycling rate, reduce the cost, and then clean the milling debris on the upper end of the intercepting screen 18 in a timely manner.

[0055] When the displacement block 5 moves, the steel brush 15 moves synchronously and scrapes off the milling debris remaining on the surface of the slide rail 3, so as to avoid the influence of the remaining milling debris on the smooth movement of the displacement block 5. Embodiment

[0056] Referring to Figure 9 and Figure 10 As shown in the figure, on the basis of the first embodiment, because the transmission shaft will have milling debris remaining in the spiral groove during the milling process, which is easy to cause adverse effects during the tool withdrawal process, in the present embodiment, two connecting grooves staggered with the milling cutter 622 are symmetrically formed on the tool holder 621, and two supporting frames 651 corresponding to the positions of the connecting grooves are installed on the tool holder 621. The rotating shaft 652 is rotatably installed between the supporting frame 651 and the connecting groove, and the outer wall of the rotating shaft 652 is provided with a rolling brush 653.

[0057] Further, in the present embodiment, the side of the rotating shaft 652 away from the mounting block 61 gradually inclines toward the side close to the axis of the tool holder 621, two linkage shafts 654 corresponding to the positions of the rotating shaft 652 are rotatably arranged inside the tool holder 621, the two linkage shafts 654 are connected with the two rotating shafts 652 through the shaft coupling respectively, a gear 655 is sleeved on the end of the linkage shaft 654 away from the rotating shaft 652, and a gear ring 656 meshing with the gear 655 is arranged on the side of the mounting block 61 close to the tool holder 621.

[0058] In the specific implementation process, the tool holder 621 drives the circumferential movement of the milling cutter 622 during the milling process of the transmission shaft, the tool holder 621 drives the synchronous circumferential movement of the rotating shaft 652, the linkage shaft 654 and the gear 655, the gear 655 revolves while rotating under the action of the gear ring 656, and the revolution direction of the gear 655 is opposite to the rotation direction (in the direction of the arrow A in the figure). Figure 10The gear 655 drives the rolling brush 653 to rotate synchronously through the connecting shaft 654 and the rotating shaft 652, and the rolling brush 653 can brush away the milling chips remaining in the spiral groove while rotating, and the brushed milling chips are discharged to the side away from the hollow shaft 628 after passing through the connecting groove; in this process, the bristles of the rolling brush 653 are bent and stored under force after being in contact with the spiral groove of the transmission shaft, and quickly rebound and quickly push out the milling chips in the spiral groove when the bristles are separated from the spiral groove, in addition, the rolling brush 653 is arranged obliquely, so that the pushed out milling chips are bounced out in the rotating direction of the rolling brush 653, that is, the milling chips are discharged to the side away from the hollow shaft 628 after passing through the connecting groove, avoiding the splashing of the milling chips which is difficult to clean.

[0059] Since the revolution direction of the rolling brush 653 is opposite to the rotation direction, the relative rotation between the rolling brush 653 and the transmission shaft can enhance the cleaning effect when the rolling brush 653 brushes away the milling chips, thereby avoiding the contact between the milling cutter 622 and the milling chips during the cutter withdrawal process due to the residual milling chips, causing the unevenness of the spiral groove, and further ensuring the precision of the milling process.

[0060] When working: first step: first, fix and install the transmission shaft to be machined on the three-jaw chuck 41, and then drive the lead screw 12 to rotate through the control box 11, and the rotating lead screw 12 drives the displacement block 5 to slide along the slide rail 3, so that the displacement block 5 drives the mounting block 61 to move to the side close to the transmission shaft to be machined.

[0061] Second step: during the movement of the displacement block 5 driving the mounting block 61, the moving block drives the arc-shaped protective cover 623 to move synchronously, and the arc-shaped protective cover 623 drives the extension rod 635 and the contact roller 637 to move as a whole through the displacement column 632, and the contact roller 637 is abutted against the outer wall of the transmission shaft to be machined under the action of the inclined guide plate 641; then the contact roller 637 is self-adapted to give way to the side away from the axis of the arc-shaped protective cover 623 according to the outer contour of the transmission shaft.

[0062] At the same time, the contact roller 637 drives the displacement column 632 and the electrode sheet 643 to move as a whole to the side away from the axis of the arc-shaped protective cover 623 through the extension rod 635, and then the electrode sheet 643 is in contact with the electrode pad 644 and transmits a signal to the controller 645, so that the controller 645 makes the driving motor 625 start to work and drives the cutter holder 621 to rotate quickly through the hollow shaft 628 and the belt pulley 626.

[0063] Since the displacement column 632 cannot continue to move after the electrode sheet 643 is in contact with the electrode pad 644, if the diameter of the transmission shaft is larger, the contact roller 637 needs to continue to expand outward, at which time the contact roller 637 drives the extension rod 635 to contract into the displacement column 632, so as to avoid the interference caused by the failure of the contact roller 637 to expand as needed, ensure the structural rationality, and adapt to the milling of transmission shafts or other workpieces with different diameters.

[0064] Third step: when the transmission shaft to be processed passes through the tool holder 621, the milling cutter 622 is matched with the slow rotating transmission shaft to mill the helical groove on the outer wall of the transmission shaft by circumferential movement, during which the cooling liquid is discharged between the milling cutter 622 and the transmission shaft through the bamboo joint pipe 624 to avoid overheating of the milling cutter 622 affecting the milling stability; the transmission shaft sequentially passes through the hollow shaft 628 and the through hole 629 during the milling process, so that the displacement block 5 can drive the mounting block 61 and the tool holder 621 as a whole to move to one side of the positioning seat 4.

[0065] In addition, the speed of the milling cutter 622 can be adjusted by adjusting the speed of the driving motor 625, so that it can be adaptively adjusted according to the processing requirements to ensure the processing stability and precision.

[0066] Fourth step: the mixture of milling chips and cooling liquid generated during the milling process is discharged downward through the discharge hole 14 into the collecting bucket 16, and the mixture is filtered under the action of the intercepting filter screen 18, so that the milling chips are left on the upper end of the intercepting filter screen 18, and the filtered cooling liquid is collected at the bottom of the collecting bucket 16, so as to facilitate the reuse of the cooling liquid, improve the resource recycling rate, reduce the cost, and then clean the milling chips on the upper end of the intercepting filter screen 18 in a timely manner.

[0067] When the displacement block 5 moves, the steel brush 15 moves synchronously and scrapes off the milling chips remaining on the surface of the slide rail 3, so as to avoid the influence of the remaining milling chips on the stable movement of the displacement block 5.

[0068] Fifth step: during the circumferential movement of the tool holder 621 driving the milling cutter 622 for milling the transmission shaft, the tool holder 621 drives the rotating shaft 652, the linkage shaft 654 and the gear 655 to move synchronously in the circumferential direction, the gear 655 cooperates with the gear ring 656 and drives the rotating shaft 652 and the rolling brush 653 as a whole to revolve while rotating, and the revolving direction of the rolling brush 653 is opposite to the rotating direction, the rolling brush 653 can brush off the milling chips remaining in the helical groove while rotating, and the brushed milling chips are discharged away from the hollow shaft 628 after passing through the connecting groove.

[0069] Sixth step: after the milling and processing of the transmission shaft are completed, the displacement block 5 drives the mounting block 61 to move away from the positioning seat 4 to retreat the tool, and the tool holder 621 still needs to rotate during the retreat process, when the mounting block 61 drives the contact roller 637 to separate from the transmission shaft, the supporting spring 639 drives the extension rod 635 and the contact roller 637 to move to the side close to the axis of the arc-shaped protective cover 623 for resetting.

[0070] The support spring 639 resets and drives the displacement column 632 to reset through the positioning ring 638, the displacement column 632 drives the electrode sheet 643 to separate from the electrode pad 644, thereby breaking the signal transmission to the controller 645, so that the controller 645 makes the driving motor 625 power off and close, so as to realize the automatic closing of the tool holder 621.

[0071] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application.

[0072] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A transmission shaft processing device, comprising two parallel arranged fixed frames (1), a slide rail (3) is installed between the two fixed frames (1) through a support (2), one support (2) is provided with a three-jaw chuck (41) for clamping a transmission shaft to be processed at the upper end through a positioning seat (4), a positioning motor (42) for driving the three-jaw chuck (41) to rotate is installed on the positioning seat (4) through a motor bracket, two displacement blocks (5) are symmetrically sleeved on the slide rail (3) along the width direction, and a processing mechanism (6) is arranged at the upper end of the two displacement blocks (5) in common. The machining mechanism (6) comprises a mounting block (61) mounted on the upper end of the two displacement blocks (5), a milling unit (62) for machining the transmission shaft is arranged on the mounting block (61), and an automatic start-stop unit (63) for controlling the start and stop of the milling unit (62) is mounted on the mounting block (61), so as to improve the machining efficiency and save energy.

2. A drive shaft machining apparatus according to claim 1, characterized in that: The side wall of one of the fixing frames (1) is provided with a control box (11), two lead screws (12) are symmetrically and rotatably arranged between the control box (11) and the other fixing frame (1), the lead screws (12) pass through the displacement blocks (5) through threaded connection, and two guide columns (13) symmetrically arranged between the control box (11) and the other fixing frame (1) slide through the displacement blocks (5).

3. A drive shaft machining apparatus as defined in claim 1, wherein: The milling unit (62) comprises a tool holder (621) rotatably arranged on the mounting block (61) close to the positioning seat (4), two milling cutters (622) are symmetrically and detachably arranged on the tool holder (621), the upper ends of the two displacement blocks (5) are jointly provided with an arc-shaped protective cover (623) covering the outside of the tool holder (621), and a bamboo joint pipe (624) for discharging cooling liquid to the tool holder (621) is mounted on the upper end of the mounting block (61).

4. A drive shaft machining apparatus according to claim 3, wherein: The milling unit (62) further comprises a driving motor (625) arranged on the upper end of the mounting block (61) through a motor base, a belt pulley (626) is mounted on the output shaft of the driving motor (625), a protective shell (627) covering the outside of the belt pulley (626) is arranged on the upper end of the mounting block (61), a hollow shaft (628) rotatably penetrating the inside of the mounting block (61) is arranged on the side of the tool holder (621) away from the positioning seat (4), a through hole (629) is formed in the side of the mounting block (61) away from the positioning seat (4), and the belt pulley (626) and the hollow shaft (628) are connected through belt transmission.

5. A drive shaft machining apparatus as claimed in claim 4, wherein: Two mounting grooves are symmetrically formed in the side of the tool holder (621) away from the hollow shaft (628), a sleeve sleeve is arranged in the mounting groove in a detachable manner, and the milling cutter (622) is mounted in the sleeve sleeve.

6. A drive shaft machining apparatus as defined in claim 3, wherein: The automatic start-stop unit (63) comprises two through holes symmetrically formed in the arc-shaped protective cover (623), a fixed sleeve (631) is mounted on the two sides of the through hole, a displacement column (632) penetrates the through hole and the fixed sleeve (631), an execution member (633) is arranged at the end of the displacement column (632) close to the axis of the arc-shaped protective cover (623), and a stress sensing member (634) is mounted at the end of the displacement column (632) away from the stress sensing member (634).

7. A drive shaft machining apparatus as claimed in claim 6, characterised in that: The execution member (633) comprises an extension rod (635) mounted at the end of the displacement column (632) close to the axis of the arc-shaped protective cover (623), a contact roller (637) is arranged at the end of the extension rod (635) away from the displacement column (632) through an axle bracket (636), a positioning ring (638) is mounted on the side of the displacement column (632) close to the extension rod (635), and a supporting spring (639) is arranged on the outside of the displacement column (632) between the positioning ring (638) and the fixed sleeve (631).

8. A drive shaft machining apparatus according to claim 7, characterised in that: The shaft support (636) is installed with an inclined guide plate (641) through a connecting plate (640) on one side close to the positioning seat (4), the side far from the contact roller (637) of the inclined guide plate (641) is inclined to the side far from the axis of the arc-shaped protective cover (623), and the side close to the contact roller (637) of the inclined guide plate (641) is tangent to the contact roller (637).

9. A drive shaft machining apparatus as defined in claim 6, wherein: The stress sensing piece (634) comprises a support frame (642) installed on the outer wall of the fixed sleeve (631) outside the arc-shaped protective cover (623), the support frame (642) is located outside the displacement column (632), and the end of the displacement column (632) and the support frame (642) are respectively provided with an electrode sheet (643) and an electrode pad (644) matched with each other, the upper end of the mounting block (61) is provided with a controller (645), the controller (645) is electrically connected with the electrode pad (644), and the controller (645) is electrically connected with the driving motor (625).

10. A drive shaft machining apparatus as claimed in claim 9, wherein: The electrode sheet (643) and the electrode pad (644) are close to each other but have a certain distance, and the distance between the electrode sheet (643) and the electrode pad (644) is smaller than the distance between the fixed sleeve (631) and the positioning ring (638).

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