Multi-station collaborative hydraulic valve element inner hole fine polishing and rolling workbench

Abstract

The invention discloses a multi-station cooperative hydraulic valve element inner hole fine polishing and rolling workbench which comprises a base, a lifting seat is arranged in the base, a controller is arranged on one side of the base, the multi-station cooperative hydraulic valve element inner hole fine polishing and rolling workbench further comprises a multi-station machining assembly, and the multi-station machining assembly is arranged in the lifting seat. The invention relates to the technical field of hydraulic valve element production equipment, hydraulic valve elements are fixed through fixing stations which are annularly distributed at equal intervals, and the hydraulic valve elements are sequentially conveyed to the positions below the machining stations, so that a multi-station machining array conducts corresponding machining operation on inner holes of the multiple hydraulic valve elements at the same time; and the workpiece is rotated and moved for multiple times, so that the inner hole of the hydraulic valve element is sequentially subjected to all procedures of preliminary honing, blowing cleaning and fine polishing rolling, the production procedures are simplified, the production efficiency and the machining precision of machining of the inner hole of the hydraulic valve element are remarkably improved, and therefore the requirement for large-scale production is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic valve core production equipment, in particular to a multi-station coordinated hydraulic valve core inner hole fine rolling workbench. BACKGROUND

[0002] The hydraulic valve core is the core component of the hydraulic valve, and its function is to control the on-off, pressure and flow regulation of the oil circuit through relative movement in the valve body. After reaming processing, the inner hole wall of the hydraulic valve core still has a certain roughness, which will affect the overall performance of the hydraulic valve. Therefore, it is usually necessary to perform rolling or honing processing again to improve the surface quality, size accuracy and wear resistance of the inner hole.

[0003] Then, the traditional hydraulic valve core inner hole fine rolling work mode is mostly single-station operation, and preliminary honing and cleaning of the hydraulic valve core inner hole are required before and after rolling processing, which leads to complex production process of the hydraulic valve core and low efficiency. At the same time, during the processing of each step, there is a lack of effective coordination mechanism between different processing steps, which makes it difficult to meet the demand of large-scale production. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a multi-station coordinated hydraulic valve core inner hole fine rolling workbench, which solves the problem that the traditional hydraulic valve core inner hole fine rolling work mode is mostly single-station operation, and preliminary honing and cleaning of the hydraulic valve core inner hole are required before and after rolling processing, which leads to complex production process of the hydraulic valve core and low efficiency. At the same time, during the processing of each step, there is a lack of effective coordination mechanism between different processing steps, which makes it difficult to meet the demand of large-scale production.

[0005] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme: a multi-station coordinated hydraulic valve core inner hole fine rolling workbench, comprising a base, a lifting seat is arranged inside the base, a controller is arranged on one side of the base, the multi-station coordinated hydraulic valve core inner hole fine rolling workbench further comprises a multi-station processing assembly, the multi-station processing assembly is arranged inside the lifting seat; a rotating station assembly is arranged inside the base below the lifting seat; a fixed tooling module is arranged below the lifting seat; wherein the fixed tooling module fixes a plurality of hydraulic valve cores, the rotating station assembly sequentially delivers the annularly distributed hydraulic valve cores to the processing position, and the multi-station processing assembly sequentially performs preliminary honing, blowing cleaning and fine rolling processing operation on the inner hole of the hydraulic valve core.

[0006] Preferably, the multi-station machining assembly comprises two first servo motors fixedly connected to the inner sides of the lifting seat, a honing reamer rotatably connected to one side of the bottom of the lifting seat and drivingly connected to the output end of one of the first servo motors, a rolling cutter rotatably connected to the side of the bottom of the lifting seat away from the honing reamer and drivingly connected to the output end of the first servo motor away from the honing reamer, a blowing pipe fixedly connected to the bottom of the lifting seat on the side where the honing reamer and the rolling cutter are close to each other, and an electromagnetic pulse valve fixedly connected to the inner part of the lifting seat and having its output end communicated with the top end of the blowing pipe. The lifting drive assembly is arranged on one side of the lifting seat. The honing reamer, the blowing pipe and the rolling cutter form a machining array of honing, cleaning and finishing rolling at the bottom of the lifting seat. The lifting drive assembly drives the lifting seat to move up and down, so that the machining tools and the blowing pipe can simultaneously and accurately operate on the inner holes of multiple hydraulic valve spools.

[0007] Preferably, the lifting drive assembly comprises a ball screw rotatably connected to one side of the base and having its outer wall threadedly connected to one side of the lifting seat, a second servo motor fixedly connected to the top of the base and having its output end drivingly connected to the ball screw, and slide rails fixedly connected to the base on the two sides of the ball screw and slidingly connected to the lifting seat. The ball screw and the second servo motor cooperate to drive the lifting seat to move up and down, and the slide rails guide and support the movement of the lifting seat to ensure the stability and accuracy of the lifting seat during the lifting process.

[0008] Preferably, the lifting drive assembly further comprises two sets of reflective photoelectric sensors fixedly connected to the base on the upper and lower sides of the lifting seat. The two sets of reflective photoelectric sensors monitor the lifting position of the lifting seat in real time and transmit sensing signals to the controller in real time, so that the controller accurately controls the lifting stroke of the lifting seat.

[0009] Preferably, the rotating station assembly comprises a rotary table arranged below the lifting seat, a drive base fixedly connected to the inner part of the base below the rotary table and having its output end fixedly connected to the rotary table, and a third servo motor arranged on one side of the drive base and having its output end drivingly connected to the rotary table. The third servo motor is controlled to drive the rotary table to rotate by means of the gear transmission structure in the drive base, so that multiple hydraulic valve spools arranged in a ring are accurately conveyed to the machining position one by one.

[0010] Preferably, the fixed tool module comprises a fixed base provided with a plurality of equidistant fixed connections on the top of the rotary table; a liquid expansion inner tube is arranged inside the fixed base; a pressing plate is fixedly connected to the top of the fixed base and cooperatively connected to the liquid expansion inner tube; a sealed oil cavity is arranged inside the fixed base and communicated with the inner wall of the liquid expansion inner tube; a hydraulic bolt is threadedly connected to the inner wall of the sealed oil cavity; wherein the fixed base is annularly distributed on the top of the rotary table, the internal oil pressure of the liquid expansion inner tube and the sealed oil cavity is adjusted by rotating the hydraulic bolt, so that the inner wall of the liquid expansion inner tube is elastically deformed.

[0011] Preferably, the fixed tool module further comprises a lower sleeve cooperatively connected to the inner wall of the liquid expansion inner tube; an upper sleeve cooperatively connected to the top of the lower sleeve; wherein the hydraulic valve core is clamped and fixed by being placed inside the lower sleeve and the upper sleeve being fixed with the lower sleeve, so as to fix and protect the hydraulic valve core and improve the clamping stability of the hydraulic valve core.

[0012] Preferably, the inside of the base is provided with a cooling and lubricating assembly, the cooling and lubricating assembly comprises an oil storage tank arranged inside the base below the driving base; a gear pump arranged on one side of the oil storage tank and having an output end communicated with the oil storage tank; two groups of cooling oil injection pipes fixedly connected to the two sides of the base below the lifting seat and communicated with the output end of the gear pump; a recovery assembly arranged below the rotary table of the base; wherein the cooling and lubricating oil stored in the oil storage tank is delivered to the cooling oil injection pipes by the gear pump and sprayed into the inner hole of the hydraulic valve core being honed and rolled to cool and lubricate the hydraulic valve core, and the recovery assembly recovers the used cooling and lubricating oil to realize the recycling of the cooling and lubricating oil.

[0013] Preferably, the recovery assembly comprises a collection groove arranged below the rotary table of the base; a plurality of backflow holes equidistantly distributed inside the collection groove; a recovery groove fixedly connected to the inside of the base below the collection groove and communicated with the oil storage tank; wherein the used cooling and lubricating oil flows into the collection groove for collection, enters the recovery groove through the backflow holes, and then flows back to the oil storage tank through the pipeline communicated with the recovery groove, so as to realize the recycling of the cooling and lubricating oil. Advantages

[0014] The application provides a multi-station coordinated hydraulic valve core inner hole fine finishing and rolling workbench, which has the following beneficial effects: the multi-station coordinated hydraulic valve core inner hole fine finishing and rolling workbench fixes the hydraulic valve core through the fixed stations in annular equidistant distribution, controls the rotation table at the bottom of the fixed station to rotate by a certain angle, and sequentially transports each hydraulic valve core below each processing station, and through the lifting movement of the lifting seat, the multi-station processing array can simultaneously perform corresponding processing operations on the inner holes of multiple hydraulic valve cores, and through the multiple rotation movements of the workpiece, the inner holes of the hydraulic valve cores can sequentially complete all processes of preliminary honing, blowing cleaning and fine finishing and rolling, and the hydraulic valve cores are processed in multiple stations in continuous coordination, which simplifies the production process, avoids the tedious process of frequent tool replacement and repeated positioning in the traditional mode, and can significantly improve the production efficiency and processing precision of the hydraulic valve core inner hole processing, thereby helping enterprises effectively shorten the production cycle and reduce production costs.

[0015] Through the cooperation between the lifting seat, the first servo motor, the honing reamer, the rolling cutter, the blowing pipe and the electromagnetic pulse valve, the processing array of honing, cleaning and fine finishing and rolling is formed at the bottom of the lifting seat, when the lifting seat moves downward, the honing reamer, the rolling cutter and the blowing pipe enter the inner holes of the hydraulic valve cores below to perform corresponding processing operations, so that multiple hydraulic valve cores can simultaneously receive processing at different stages, and the processing of preliminary honing, blowing cleaning and fine finishing and rolling is parallelized, which helps to reduce the waiting time of workpiece processing and can reduce the overall volume of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the application; Figure 2 It is a schematic view of the appearance of the application; Figure 3 It is a sectional view of the appearance of the application; Figure 4 It is a structural schematic view of the fixed base, the liquid expansion inner tube and the lower sleeve in the application; Figure 5 It is a sectional view of the appearance of the fixed base, the liquid expansion inner tube and the sealing oil cavity in the application; Figure 6 It is Figure 1 It is a local enlarged view of area A in the application; Figure 7 It is Figure 1 It is a local enlarged view of area B in the application.

[0017] Explanation of reference signs: 1, base; 2, lifting seat; 3, controller; 4, multi-station machining assembly; 5, rotating station assembly; 6, fixed tooling module; 41, first servo motor; 42, honing reamer; 43, rolling cutter; 44, blowing pipe; 45, electromagnetic pulse valve; 46, lifting drive assembly; 461, ball screw; 462, second servo motor; 463, sliding rail; 464, pair of photoelectric sensors; 51, rotary table; 52, drive base; 53, third servo motor; 61, fixed base; 62, liquid expansion inner tube; 63, abutting plate; 64, sealed oil cavity; 65, hydraulic bolt; 66, lower sleeve; 67, upper sleeve; 7, cooling and lubricating assembly; 71, oil storage tank; 72, gear pump; 73, cooling oil injection pipe; 74, recovery assembly; 741, collection groove; 742, backflow hole; 743, recovery groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] The traditional hydraulic valve core inner hole finishing rolling working mode is mostly single-station operation, and preliminary honing and cleaning of the hydraulic valve core inner hole are needed before and after rolling machining, which leads to complex production procedures of the hydraulic valve core and low efficiency, and meanwhile, there is lack of effective coordination mechanism between different machining steps in the machining process, which is difficult to meet the demand of large-scale production.

[0020] Therefore, the present application provides a multi-station coordinated hydraulic valve core inner hole finishing rolling workbench, which fixes the hydraulic valve core through the fixed stations distributed in a ring shape at equal intervals, rotates the rotary table at the bottom of the fixed station by a certain angle, sequentially transports each hydraulic valve core below each machining station, moves the lifting seat up and down to simultaneously perform corresponding machining operations on the inner holes of multiple hydraulic valve cores by the multi-station machining array, and rotates and moves the workpiece multiple times to sequentially complete all procedures of preliminary honing, blowing cleaning and finishing rolling of the inner hole of the hydraulic valve core, realize multi-station continuous coordinated machining of the hydraulic valve core, simplify the production procedure, avoid the cumbersome process of frequent tool replacement and repeated positioning in the traditional mode, significantly improve the production efficiency and machining precision of the hydraulic valve core inner hole, and thus meet the demand of large-scale production.

[0021] Through the personnel in the art, the parts in the case are connected in turn, the specific connection and the operation sequence should be referred to the following working principle, the detailed connection means is the public technical knowledge in the art, the following mainly introduces the working principle and the process.

[0022] By Figures 1-7 It can be known that the multi-station coordinated hydraulic valve core inner hole fine finish rolling workbench comprises a base 1, a lifting seat 2 is arranged in the interior of the base 1, a controller 3 is arranged on one side of the base 1, the multi-station coordinated hydraulic valve core inner hole fine finish rolling workbench further comprises a multi-station machining assembly 4, a rotating station assembly 5 and a fixed tooling module 6, the multi-station machining assembly 4 is arranged in the interior of the lifting seat 2; the rotating station assembly 5 is arranged in the interior of the base 1 below the lifting seat 2; the fixed tooling module 6 is arranged below the lifting seat 2; wherein the fixed tooling module 6 fixes a plurality of hydraulic valve cores, the annularly distributed hydraulic valve cores are sequentially conveyed to the machining position through the rotating station assembly 5, and the inner holes of the hydraulic valve cores are sequentially subjected to preliminary honing, blowing cleaning and fine finish rolling machining operations through the multi-station machining assembly 4; In the specific implementation process, it is particularly worth pointing out that a plurality of fixed tooling modules 6 are annularly and equidistantly distributed on the top of the rotating table of the rotating station assembly 5, forming a plurality of stations for fixing the hydraulic valve spool on the top of the rotating table, and by controlling the rotation of the rotating table in the rotating station assembly 5 by a certain angle, each hydraulic valve spool can be sequentially transported to the bottom of the multi-station machining assembly 4, which forms a machining array of honing, cleaning and rolling on the bottom of the lifting seat 2. When the hydraulic valve spool is transported to the bottom of the multi-station machining assembly 4, the multi-station machining array installed on the lifting seat 2 is synchronously lifted by lifting the lifting seat 2, so that the inner holes of the plurality of hydraulic valve spools transported to the machining station are simultaneously subjected to preliminary honing, blowing cleaning and finishing rolling machining operations, and after completing a machining operation, the hydraulic valve spool is transported to the next machining position by rotating the rotating station assembly 5 by a certain angle, until the inner hole of the hydraulic valve spool completes the entire process of preliminary honing, blowing cleaning and finishing rolling, the hydraulic valve spool is taken out and placed in a new workpiece to be machined, realizing multi-station continuous collaborative machining, simplifying the production process, and the controller 3 is used to accurately control each component of the equipment, including controlling the rotation angle and interval time of the rotating station assembly 5, controlling the lifting height and lifting speed of the lifting seat 2, controlling the start and stop of the machining tool of the multi-station machining assembly 4 and the rotating speed, etc., and can automatically control the entire machining process according to the preset program to ensure accurate cooperation between parts. In actual application, by setting the related machining parameters through the controller 3, the workbench can automatically complete the entire machining process from preliminary honing to finishing rolling, and the operator only needs to take out the machined hydraulic valve spool and place the hydraulic valve spool to be machined on the fixed tooling module 6, greatly reducing the labor intensity of the operator, while improving the stability and consistency of the machining. Through the cooperation between the base 1, the lifting seat 2, the controller 3, the multi-station machining assembly 4, the rotating station assembly 5 and the fixed tooling module 6, the hydraulic valve spool is fixed by the annularly and equidistantly distributed fixed stations, each hydraulic valve spool is sequentially transported to the bottom of each machining station by rotating the rotating table at the bottom of the fixed station by a certain angle, the multi-station machining array is simultaneously subjected to preliminary honing, blowing cleaning and finishing rolling machining operations on the inner holes of the plurality of hydraulic valve spools by lifting the lifting seat 2, the inner hole of the hydraulic valve spool sequentially completes the entire process of preliminary honing, blowing cleaning and finishing rolling by rotating the rotating table multiple times, realizing multi-station continuous collaborative machining of the hydraulic valve spool, simplifying the production process, avoiding the tedious process of frequent tool replacement and repeated positioning in the traditional way, significantly improving the production efficiency and machining precision of the hydraulic valve spool inner hole, thereby meeting the demand of large-scale production. The specific model of the controller 3 is not limited, as long as it meets the use requirements; Further, the multi-station machining assembly 4 comprises first servo motors 41, a honing reamer 42, a rolling cutter 43, a blowing pipe 44, an electromagnetic pulse valve 45 and a lifting driving assembly 46, the first servo motors 41 are provided with two and fixedly connected to the two sides of the inside of the lifting seat 2, the honing reamer 42 is rotatably connected to the bottom side of the lifting seat 2 and drivingly connected to the output end of one of the first servo motors 41, the rolling cutter 43 is rotatably connected to the bottom side of the lifting seat 2 away from the honing reamer 42 and drivingly connected to the output end of the first servo motor 41 away from the honing reamer 42, the blowing pipe 44 is fixedly connected to the bottom of the lifting seat 2 on the side close to the honing reamer 42 and the rolling cutter 43, the electromagnetic pulse valve 45 is fixedly connected to the inside of the lifting seat 2 and the output end thereof is communicated with the top end of the blowing pipe 44, and the lifting driving assembly 46 is arranged on one side of the lifting seat 2, wherein the honing reamer 42, the blowing pipe 44 and the rolling cutter 43 form a machining array of honing, cleaning and finishing rolling at the bottom of the lifting seat 2, the lifting seat 2 is driven by the lifting driving assembly 46 to move up and down, so that the machining tools and the blowing pipe 44 can accurately and simultaneously perform corresponding operations on the inner holes of the plurality of hydraulic valve spools; In the specific implementation process, it is particularly worth pointing out that the first servo motors 41 are used to provide rotary power for the honing reamer 42 and the rolling cutter 43, so as to ensure that they can process the inner holes of the hydraulic valve spools at a suitable rotating speed, the honing reamer 42, the rolling cutter 43 and the blowing pipe 44 form a machining array of honing, cleaning and finishing rolling at the bottom of the lifting seat 2, the input end of the electromagnetic pulse valve 45 is connected with an external air source and is used to control the on-off of the blowing airflow of the blowing pipe 44, through the cooperation between the lifting seat 2, the first servo motors 41, the honing reamer 42, the rolling cutter 43, the blowing pipe 44 and the electromagnetic pulse valve 45, when the lifting seat 2 moves downward, the honing reamer 42, the rolling cutter 43 and the blowing pipe 44 enter the inner holes of the hydraulic valve spools below them, the honing reamer 42 rotating at a high speed performs preliminary honing on the inner holes of the hydraulic valve spools, grinds and removes the impurities such as burrs and oxide layers on the inner hole surface, and improves the surface quality of the inner hole, at the same time, the electromagnetic pulse valve 45 is opened, compressed air is sprayed out of the blowing pipe 44 at a high speed, and the debris generated in the honing process is cleaned in time to prevent the debris from affecting the quality of the subsequent rolling processing, the rolling cutter 43 rotating at a high speed performs finishing rolling on the inner holes of the workpieces which have been subjected to preliminary honing and blowing cleaning, the rolling rod of the rolling cutter 43 extrudes and rubs the inner hole surface to make the inner hole surface plastically deform, so as to further improve the dimensional accuracy and surface quality of the inner hole, and the inner holes of the hydraulic valve spools are sequentially subjected to high-precision processing of preliminary honing, blowing cleaning and finishing rolling, and the lifting driving assembly 46 is used to stably lift and move the lifting seat 2, so as to drive the machining tools and the blowing pipe 44 to accurately process the hydraulic valve spools, wherein the specific model of the first servo motor 41 is not limited and can meet the use requirement; Further, the lifting driving assembly 46 comprises a ball screw 461, a second servo motor 462 and a slide rail 463, the ball screw 461 is rotationally connected to one side of the base 1, and the outer wall is threadedly connected to one side of the lifting seat 2; the second servo motor 462 is fixedly connected to the top of the base 1, and the output end is drivingly connected to the ball screw 461; the slide rail 463 is fixedly connected to the base 1 on both sides of the ball screw 461, and the outer wall is slidingly connected to the lifting seat 2; wherein, through the cooperation of the ball screw 461 and the second servo motor 462, the lifting seat 2 moves up and down, and the movement of the lifting seat 2 is guided and supported by the slide rail 463, ensuring the stability and precision of the lifting seat 2 during lifting; In the specific implementation process, it is particularly worth pointing out that through the cooperation between the base 1, the lifting seat 2, the ball screw 461, the second servo motor 462 and the slide rail 463, when the second servo motor 462 is started, the output end drives the ball screw 461 to rotate, and the ball screw pair installed on the lifting seat 2 drives the lifting seat 2 to stably move up and down along the slide rail 463 under the action of the rotation of the ball screw 461, ensuring the stability and precision of the lifting seat 2 during lifting, avoiding the shaking or deviation, and thus ensuring the machining precision of the equipment, wherein the specific model of the second servo motor 462 is not limited, and it can meet the use requirement; Further, the lifting driving assembly 46 further comprises a pair of photoelectric sensors 464, which are fixedly connected to the base 1 on the upper and lower sides of the lifting seat 2; wherein, the lifting position of the lifting seat 2 is monitored in real time by the two pairs of photoelectric sensors 464, and the sensing signals are transmitted to the controller 3 in real time, so that the controller 3 accurately controls the lifting stroke of the lifting seat 2; In the specific implementation process, it is particularly worth pointing out that the two pairs of photoelectric sensors 464 are respectively installed on the base 1 at the upper and lower positions corresponding to the lifting path of the lifting seat 2, when the lifting seat 2 moves to the sensing area of the photoelectric sensor 464, the sensor will immediately detect the position change of the lifting seat 2, and convert the signal into an electrical signal and rapidly transmit it to the controller 3, after the controller 3 receives the signal, according to the preset program, controls the start and stop and the rotation direction of the second servo motor 462, and then accurately controls the lifting height of the lifting seat 2, ensuring that the lifting seat 2 can accurately stop at the preset machining position, avoiding affecting the machining quality due to excessive or insufficient lifting, wherein the specific model of the photoelectric sensor 464 is not limited, and it can meet the use requirement; Further, the rotating station assembly 5 comprises a rotary table 51, a driving base 52 and a third servo motor 53. The rotary table 51 is arranged below the lifting seat 2. The driving base 52 is fixedly connected to the inside of the base 1 below the rotary table 51, and the output end is fixedly connected to the rotary table 51. The third servo motor 53 is arranged on one side of the driving base 52, and the output end is drivingly connected to the rotary table 51. By controlling the third servo motor 53, the rotary table 51 is driven to rotate by the gear transmission structure inside the driving base 52, and the multiple hydraulic valve cores arranged in a ring are sequentially and accurately transported to the machining position. In the specific implementation process, it is particularly worth pointing out that through the cooperation between the rotary table 51, the driving base 52 and the third servo motor 53, when the third servo motor 53 is started, the output end drives the rotary table 51 to rotate accurately by the gear transmission structure inside the driving base 52. An encoder is installed inside the driving base 52 for sensing the rotation angle, which can monitor the rotation angle of the rotary table 51 in real time and feed back the angle signal to the controller 3. The controller 3 accurately controls the start and stop of the third servo motor 53 according to the preset rotation angle and interval time. Since the multiple fixed tooling modules 6 are arranged in a ring at equal intervals on the top of the rotary table 51, the rotary table 51 can accurately transport the next hydraulic valve core to the machining station below every time it rotates by a certain angle, ensuring the continuity and accuracy of multi-station machining, avoiding errors caused by manual handling and inaccurate positioning in traditional machining methods, and significantly improving the machining efficiency and the stability of product quality. The specific model of the third servo motor 53 is not limited, as long as it meets the use requirements; Further, the fixed tooling module 6 comprises a fixed base 61, a liquid expansion inner tube 62, a pressing plate 63, a sealed oil cavity 64 and a hydraulic bolt 65. The fixed base 61 is arranged in a ring and fixedly connected to the top of the rotary table 51. The liquid expansion inner tube 62 is arranged inside the fixed base 61. The pressing plate 63 is fixedly connected to the top of the fixed base 61 and cooperatively connected to the liquid expansion inner tube 62. The sealed oil cavity 64 is arranged inside the fixed base 61 and communicates with the inner wall of the liquid expansion inner tube 62. The hydraulic bolt 65 is threadedly connected to the inner wall of the sealed oil cavity 64. The fixed base 61 is arranged in a ring on the top of the rotary table 51. By rotating the hydraulic bolt 65, the internal oil pressure of the liquid expansion inner tube 62 and the sealed oil cavity 64 is adjusted, so that the inner wall of the liquid expansion inner tube 62 is elastically deformed. In the specific implementation process, it is particularly worth pointing out that the abutting plate 63 abuts and fixes the liquid expansion inner tube 62 on the top of the fixed base 61, and a plurality of sealing ring structures are arranged between the fixed base 61 and the liquid expansion inner tube 62 to avoid leakage of hydraulic oil. Through the cooperation between the fixed base 61, the liquid expansion inner tube 62, the abutting plate 63, the sealed oil cavity 64 and the hydraulic bolt 65, when it is necessary to fix the hydraulic spool, the operator only needs to rotate the hydraulic bolt 65. As the hydraulic bolt 65 is screwed in, the oil pressure in the sealed oil cavity 64 and the liquid expansion inner tube 62 gradually increases, the thin wall in the liquid expansion inner tube 62 elastically deforms under the action of the oil pressure, expands outward and abuts and fixes the protective sleeve pipe in which the hydraulic spool is fixed, so as to ensure that the hydraulic spool does not displace or shake during processing. After the inner hole of the hydraulic spool is processed, the oil pressure in the sealed oil cavity 64 and the liquid expansion inner tube 62 is reduced by rotating the hydraulic bolt 65 outward, the liquid expansion inner tube 62 returns to its original state, the abutting of the protective sleeve pipe is released, and the operator can easily take out the protective sleeve pipe and the processed hydraulic spool, and replace the new workpiece to be processed. Not only is the operation simple, but also the stability and precision of the hydraulic spool during processing can be ensured, and the processing error caused by displacement or shaking of the workpiece can be effectively avoided. Further, the fixed tool module 6 further comprises a lower sleeve pipe 66 and an upper sleeve pipe 67. The lower sleeve pipe 66 is connected to the inner wall of the liquid expansion inner tube 62 in a matched manner. The upper sleeve pipe 67 is connected to the top of the lower sleeve pipe 66 in a matched manner. The hydraulic spool is placed in the lower sleeve pipe 66, and the upper sleeve pipe 67 is fixed with the lower sleeve pipe 66 to clamp and fix the hydraulic spool, fix and protect the hydraulic spool, and improve the clamping stability of the hydraulic spool. In the specific implementation process, it is particularly worth pointing out that the lower sleeve pipe 66 and the upper sleeve pipe 67 cooperate to form the protective sleeve pipe of the hydraulic spool. Positioning holes matched with the outer dimensions of the hydraulic spool are formed in the lower sleeve pipe 66 and the upper sleeve pipe 67, and through holes are formed at both ends. When the hydraulic spool is placed in the lower sleeve pipe 66, the upper sleeve pipe 67 is fixed with the lower sleeve pipe 66 to clamp the hydraulic spool at both ends, and then the lower sleeve pipe 66 and the upper sleeve pipe 67 are placed in the fixed base 61 for fixation. Not only can the stability of the hydraulic spool during processing be ensured, but also the surface of the hydraulic spool can be effectively protected from damage to avoid scratches or collisions on the outer wall, thereby improving the processing quality and yield of the hydraulic spool. Further, the inside of the base 1 is provided with a cooling and lubricating assembly 7, which comprises an oil storage tank 71, a gear pump 72, cooling oil injection pipes 73 and a recovery assembly 74. The oil storage tank 71 is arranged inside the base 1 below the driving base 52. The gear pump 72 is arranged on one side of the oil storage tank 71 and has an output end in communication with the oil storage tank 71. The cooling oil injection pipes 73 are arranged in two groups and fixedly connected to the two sides of the base 1 below the lifting seat 2 and in communication with the output end of the gear pump 72. The recovery assembly 74 is arranged below the rotary table 51 of the base 1. The cooling and lubricating oil stored in the oil storage tank 71 is delivered to the cooling oil injection pipes 73 by the gear pump 72 and sprayed into the hydraulic valve spool inner hole being honed and roll-pressed to cool and lubricate it. The recovery assembly 74 recycles the used cooling and lubricating oil to realize the recycling of the cooling and lubricating oil. In the specific implementation process, it is worth noting that the oil storage tank 71, the gear pump 72, the cooling oil injection pipes 73 and the recovery assembly 74 cooperate together. The cooling and lubricating oil is stored in the oil storage tank 71. When the equipment starts honing and roll-pressing, the gear pump 72 is started synchronously to pressurize and deliver the cooling and lubricating oil stored in the oil storage tank 71 to the cooling oil injection pipes 73. The cooling oil injection pipes 73 accurately spray the cooling and lubricating oil to the surface of the hydraulic valve spool inner hole being processed, effectively reducing the temperature of the processing area and reducing the friction coefficient between the tool and the workpiece, thereby prolonging the service life of the tool and improving the quality of the processed surface. The cooling and lubricating oil is recycled by the recovery assembly 74 to improve resource utilization and reduce production cost. The specific model of the gear pump 72 is not limited and can meet the use requirements. Further, the recovery assembly 74 comprises a collection groove 741, a plurality of backflow holes 742 and a recovery groove 743. The collection groove 741 is arranged below the rotary table 51 of the base 1. The backflow holes 742 are arranged in multiple numbers and equidistantly distributed inside the collection groove 741. The recovery groove 743 is fixedly connected to the inside of the base 1 below the collection groove 741 and in communication with the oil storage tank 71. The used cooling and lubricating oil flows into the collection groove 741 for collection, enters the recovery groove 743 through the backflow holes 742 and is backflowed to the oil storage tank 71 through the pipeline in communication with the recovery groove 743 to realize the recycling of the cooling and lubricating oil. In the implementation process, it is particularly worth pointing out that through the cooperation between the collection groove 741, the backflow hole 742 and the recovery groove 743, when the cooling and lubricating oil completes the cooling and lubrication of the machining area, it flows into the collection groove 741 below the rotary table 51, and reenters the inside of the oil storage tank 71 through the backflow hole 742 and the recovery groove 743. The inside of the oil storage tank 71 is provided with a filtering module, which can filter the recovered cooling and lubricating oil, remove the metal chips and impurities contained therein, ensure that the cooling and lubricating oil transported to the cooling oil jet pipe 73 again is clean, thereby guaranteeing the cooling and lubrication effect, improving the utilization rate of the cooling and lubricating oil, and effectively reducing the production cost. Working principle: first, the operator puts the hydraulic spool to be machined into the protective sleeve for fixation, then places the protective sleeve on the fixed base 61, fixes the protective sleeve by rotating the hydraulic bolt 65, starts the third servo motor 53 controlled by the controller 3, and accurately transports the fixed hydraulic spool to the machining station below. At this time, the second servo motor 462 and the first servo motor 41 are started by the controller 3, the lifting seat 2 moves downward, the high-speed rotating reaming shell 42 enters the hydraulic spool hole for preliminary reaming, after reaming, the controller 3 automatically controls the lifting seat 2 to reset, and controls the third servo motor 53 to rotate the rotary table 51 to a certain angle, and transports the reamed hydraulic spool to the next station, at the same time, the next hydraulic spool is transported to the bottom of the reaming shell 42, the second servo motor 462 and the first servo motor 41 are started again by the controller 3, the lifting seat 2 moves downward, the reaming shell 42 reams the new hydraulic spool hole, at the same time, the electromagnetic pulse valve 45 is opened, the compressed air is sprayed out at high speed through the blowing pipe 44, the debris generated by reaming is cleaned in time to prevent the debris from affecting the quality of subsequent rolling, after preliminary reaming and debris cleaning, the lifting seat 2 is reset again by the controller 3, and the rotary table 51 is driven to transport the reamed and cleaned hydraulic spool to the finishing rolling station, then the second servo motor 462 is accurately controlled by the controller 3 to move the lifting seat 2 downward again, so that the rolling rod of the rolling cutter 43 accurately enters the hydraulic spool hole, and the inner hole surface is continuously extruded and rubbed by the rolling rod to make the inner hole surface plastic deformation, after finishing rolling, the lifting seat 2 is reset again by the controller 3, and the rotary table 51 is driven to transport the machined hydraulic spool to the next station, through the above steps, the hydraulic spool hole can complete the preliminary reaming, debris cleaning and finishing rolling, after the machined hydraulic spool is removed from the multi-station machining assembly 4, the protective sleeve and the hydraulic spool are taken out from the fixed base 61 and placed in the new hydraulic spool and protective sleeve to be machined, at this time, a complete machining cycle is completed, and a new hydraulic spool hole machining process can be started immediately.

[0023] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable, comprising a base (1), characterized in that: The base (1) is provided with a lifting seat (2) inside, and a controller (3) is provided on one side of the base (1). The multi-station collaborative hydraulic valve core inner hole fine rolling worktable also includes: a multi-station processing component (4) provided inside the lifting seat (2); a rotating station component (5) provided inside the base (1) below the lifting seat (2); and a fixed tooling module (6) provided below the lifting seat (2). The fixed tooling module (6) fixes multiple hydraulic valve cores, and the rotating station assembly (5) sequentially transports the annularly distributed hydraulic valve cores to the processing position. The multi-station processing assembly (4) sequentially performs preliminary honing, blow cleaning and fine rolling processing on the inner hole of the hydraulic valve cores.

2. The multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 1, characterized in that: The multi-station processing component (4) includes: two first servo motors (41), which are fixedly connected to the inside sides of the lifting seat (2); a honing reamer (42), which is rotatably connected to the bottom side of the lifting seat (2) and is driven to the output end of one of the first servo motors (41); a rolling cutter (43), which is rotatably connected to the bottom side of the lifting seat (2) away from the honing reamer (42) and is driven to the output end of the first servo motor (41) away from the honing reamer (42); a purge pipe (44), which is fixedly connected to the bottom of the lifting seat (2) on the side where the honing reamer (42) and the rolling cutter (43) are close to each other; an electromagnetic pulse valve (45), which is fixedly connected to the inside of the lifting seat (2) and whose output end is connected to the top of the purge pipe (44); and a lifting drive component (46), which is located on one side of the lifting seat (2). The honing reamer (42), the blowpipe (44) and the rolling cutter (43) form a honing, cleaning and finishing rolling array at the bottom of the lifting seat (2). The lifting seat (2) is driven to move up and down by the lifting drive assembly (46), so that the machining tool and the blowpipe (44) can accurately perform corresponding operations on the inner holes of multiple hydraulic valve cores at the same time.

3. The multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 2, characterized in that: The lifting drive assembly (46) includes: a ball screw (461), which is rotatably connected to one side of the base (1) and has its outer wall threadedly connected to one side of the lifting seat (2); a second servo motor (462), which is fixedly connected to the top of the base (1) and has its output end drivenly connected to the ball screw (461); and a slide rail (463), which is fixedly connected to both sides of the base (1) located on the ball screw (461) and has its outer wall slidably connected to the lifting seat (2). The lifting seat (2) is raised and lowered by the cooperation of the ball screw (461) and the second servo motor (462), and the movement of the lifting seat (2) is guided and supported by the slide rail (463) to ensure the stability and accuracy of the lifting seat (2) during the lifting process.

4. The multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 3, characterized in that: The lifting drive assembly (46) further includes: two sets of through-beam photoelectric sensors (464), which are fixedly connected to the base (1) and located on both sides of the lifting seat (2); The lifting position of the lifting seat (2) is monitored in real time by two sets of through-beam photoelectric sensors (464), and the sensing signal is transmitted to the controller (3) in real time, so that the controller (3) can accurately control the lifting stroke of the lifting seat (2).

5. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 4, characterized in that: The rotary workstation assembly (5) includes: a rotary table (51) located below the lifting seat (2); a drive base (52) fixedly connected to the interior of the base (1) located below the rotary table (51), and its output end fixedly connected to the rotary table (51); and a third servo motor (53) located on one side of the drive base (52), and its output end being drivenly connected to the rotary table (51). In this process, by controlling the third servo motor (53), the gear transmission structure inside the drive base (52) drives the rotary table (51) to rotate, thereby accurately conveying the multiple hydraulic valve cores distributed in a ring to the processing position in sequence.

6. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 5, characterized in that: The fixed tooling module (6) includes: a fixed base (61), which is provided in multiple locations and is fixedly connected to the top of the rotary table (51) at equal intervals; a hydraulic expansion inner tube (62), which is located inside the fixed base (61); a clamping plate (63), which is fixedly connected to the top of the fixed base (61) and is connected to the hydraulic expansion inner tube (62); a sealing oil cavity (64), which is located inside the fixed base (61) and communicates with the inner wall of the hydraulic expansion inner tube (62); and a hydraulic bolt (65), which is threadedly connected to the inner wall of the sealing oil cavity (64). The fixed base (61) is distributed in a ring on the top of the rotary table (51). By rotating the hydraulic bolt (65), the internal oil pressure of the hydraulic expansion inner tube (62) and the sealing oil chamber (64) is adjusted, so that the inner wall of the hydraulic expansion inner tube (62) undergoes elastic deformation.

7. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 6, characterized in that: The fixed tooling module (6) further includes: a lower sleeve (66), which is connected to the inner wall of the hydraulic expansion inner tube (62); and an upper sleeve (67), which is connected to the top of the lower sleeve (66). The hydraulic valve core is clamped and fixed by placing it inside the lower sleeve (66) and fixing the upper sleeve (67) to the lower sleeve (66), thereby fixing and protecting the hydraulic valve core and improving the clamping stability of the hydraulic valve core.

8. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 7, characterized in that: The base (1) is provided with a cooling and lubrication assembly (7), which includes: an oil reservoir (71) located inside the base (1) below the drive base (52); and a gear pump (72) located on one side of the oil reservoir (71) with its output end connected to the oil reservoir (71). Two sets of cooling oil injection pipes (73) are provided, which are fixedly connected to both sides of the base (1) below the lifting seat (2) and connected to the output end of the gear pump (72); the recovery assembly (74) is provided on the base (1) below the rotary table (51); The cooling lubricating oil stored inside the oil tank (71) is delivered to the cooling oil spray pipe (73) by the gear pump (72) and sprayed onto the inner hole of the hydraulic valve core that is being honed and rolled, so as to cool and lubricate it. The recycling component (74) recycles the used cooling lubricating oil to realize the recycling of the cooling lubricating oil.

9. A multi-station collaborative hydraulic valve core inner hole precision rolling worktable according to claim 8, characterized in that: The recycling component (74) includes: a collection tank (741) disposed on the base (1) below the rotary table (51); multiple return holes (742) disposed thereon, evenly distributed inside the collection tank (741); and a recycling tank (743) fixedly connected to the inside of the base (1) below the collection tank (741) and connected to the oil storage tank (71). The used cooling lubricating oil flows into the collection tank (741) for collection, and enters the recycling tank (743) through the return hole (742). Then, it flows back to the oil storage tank (71) through the pipe connected to the recycling tank (743) to recycle the cooling lubricating oil.

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