A flexible production line and processing technology for lathe spindle parts processing

Abstract

The present invention is a flexible production line and processing technology for lathe spindle parts processing, including a material scheduling and turnover device, a material temporary storage device, a material processing device and a main control system; the material turnover device is composed of a manipulator, a walking base and a track, and the manipulator can walk and position on the track through the walking base; the material processing device is arranged on both sides of the track, and is composed of a number of CNC machine tools; the material temporary storage device is composed of a number of transfer tables; the walking base and the manipulator can receive control instructions from the main control system, and according to the control instructions, grab the lathe spindle parts on the material temporary storage device or the material processing device, and transport them to the designated material temporary storage device or material processing device. The present invention can improve the manufacturing accuracy and quality stability of spindle parts, thereby improving the reliability and accuracy stability of CNC lathes. In addition, the present invention is designed based on production rhythm, processing flexibility, and manufacturing accuracy, and can greatly improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing of shaft parts, and in particular to a flexible production line and processing technology for processing lathe spindle parts. Background Art

[0002] Precision lathe spindle parts are key parts of high-end CNC lathes, and their rotary motion accuracy directly affects the performance and processing accuracy of high-end CNC lathes. At present, my country's machine tool manufacturing companies are seriously lacking in efficient and precise complete sets of processing equipment and production lines for precision lathe spindle parts. Therefore, various single machines and self-made equipment are usually used in sequence to achieve the processing of precision lathe spindle parts. The main processing process includes turning, boring, external cylindrical grinding, internal cylindrical grinding, etc. Turning generally uses ordinary lathes such as C630, and the inner hole of the spindle is generally bored with a self-made power head. The spindle parts are tempered as a whole, and the wear-resistant working surface is locally quenched or nitrided, etc., and finishing is done by grinding.

[0003] This processing and manufacturing model has poor precision stability, low production efficiency, and poor dimensional consistency of parts. It cannot meet the processing needs of domestic machine tool manufacturers for precision lathe spindle parts, which seriously restricts the development of my country's high-end CNC machine tool manufacturing industry and has become a major bottleneck problem in my country's high-end CNC machine tool manufacturing industry. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a flexible production line and processing technology for machining lathe spindle parts.

[0005] The technical solution adopted by the present invention is:

[0006] A flexible production line for machining lathe spindle parts, comprising a material scheduling and turnover device, a material temporary storage device, a material processing device and a main control system; the material turnover device is composed of a manipulator, a walking base and a track, the manipulator can walk and position on the track through the walking base, and the manipulator and the walking base respectively exchange information with the main control system; the material processing device is arranged on both sides of the track, and is composed of a plurality of CNC machine tools, and each CNC machine tool exchanges information with the main control system; the material temporary storage device is composed of a plurality of transfer tables, and the plurality of transfer tables are arranged between the CNC machine tools, and exchange information with the main control system; the walking base and the manipulator can receive control instructions from the main control system, and according to the control instructions, grab the lathe spindle parts on the material temporary storage device or the material processing device, and transport them to the designated material temporary storage device or the material processing device.

[0007] Preferably, the walking base of the material turnover device is provided with a bevel gear, a rack, a medium inertia and large torque servo motor and a walking wheel; the manipulator of the material turnover device adopts a multi-joint manipulator, and the grasping assembly of the manipulator is composed of four pneumatic claws, and the four pneumatic claws form two pairs of large-stroke split double-claw structures that can grasp the lathe spindle parts; the track of the material turnover device adopts a high-precision linear guide rail and is equipped with a digital control lubrication system.

[0008] Preferably, the material processing device is composed of a first high-rigidity CNC lathe, a second high-rigidity CNC lathe, a third high-rigidity CNC lathe, and a CNC center hole grinder, which are arranged on one side of the walking track and lined up in a row, and a special CNC internal cylindrical grinder, a first CNC end face external cylindrical grinder, a second CNC end face external cylindrical grinder, a third CNC end face external cylindrical grinder, and a horizontal machining center, which are arranged on the other side of the walking track and lined up in a row; the high-rigidity CNC lathe adopts a hydrostatic guide rail, and the machine is also equipped with a tool setting module, a workpiece detection module, a tool monitoring module and a thermal compensation module; the CNC end face external cylindrical grinder adopts a large variable diameter measuring frame connected to the gantry through a tilting cylinder, and a radial measuring instrument module is installed in the machine; each CNC machine tool is respectively provided with a programmable controller, and the CNC machine tool processing parameters are controlled by the programmable controller.

[0009] Preferably, the material temporary storage device includes five transfer tables, the first transfer table is arranged on one side of the first high-rigidity CNC lathe, the second transfer table, the third transfer table and the fourth transfer table are arranged between the first high-rigidity CNC lathe and the CNC center hole grinder, and the fifth transfer table is arranged between the first CNC end face external cylindrical grinder and the special CNC internal cylindrical grinder; the transfer table is a box-type structure, and the top of the box is provided with a transmission assembly that can drive the top table to move, and the top table is provided with a tooling assembly for supporting the spindle parts, and the tooling assembly is a symmetrically arranged V-block; the transmission assembly of the first transfer table is a roller, and the transmission assemblies of the remaining transfer tables are linear slide rails.

[0010] Preferably, the main control system is composed of a computer, a main control cabinet, a servo controller, a PLC information interaction module, an information transmission module and a sensor. The computer is the input port of the main control cabinet. The main control cabinet is connected to the servo controller of the servo motor, the manipulator, the PLC information interaction module and the information transmission module by network cables; the servo controller and the manipulator of the servo motor exchange information with the main controller, and the pneumatic clamping jaws of the manipulator are provided with a shooting sensor; the programmable controller of each CNC machine tool is connected to the PLC information interaction module, and exchanges information with the main control system through the PLC information interaction module; several transfer tables are respectively provided with information transmission modules, and exchange information with the main control system through the information transmission modules, and a tentacle sensor connected to the information transmission module is provided on the box of the transfer table.

[0011] Preferably, the flexible production line for lathe spindle parts processing is also equipped with a video monitoring device, which consists of a high-definition network infrared all-in-one machine and a network hard disk recorder. The high-definition network infrared all-in-one machine is installed in all CNC machine tool processing areas within the line, and the network hard disk recorder is wired to the main control cabinet of the main control system.

[0012] Preferably, the flexible production line for lathe spindle parts processing is also equipped with a manual auxiliary line and a material bin. The material bin and the manual auxiliary line are lined up in a row, and a crane is provided between the material bin and the automatic production line. The manual auxiliary line is composed of a center hole grinder and a fourth high rigidity CNC lathe. The material bin is composed of an upper bin and a lower bin.

[0013] Preferably, a sixth turntable is provided between the second high-rigidity CNC lathe and the third high-rigidity CNC lathe; a seventh turntable is provided on one side of the third high-rigidity CNC lathe; an eighth turntable is provided between the horizontal machining center and the third CNC end face external cylindrical grinder; a ninth turntable is provided between the third CNC end face external cylindrical grinder and the second CNC end face external cylindrical grinder; a tenth turntable is provided between the second CNC end face external cylindrical grinder and the first CNC end face external cylindrical grinder; the transmission component of the seventh turntable is a roller, and the transmission components of the remaining turntables are linear slide rails.

[0014] A processing technology for lathe spindle parts, which adopts the above-mentioned flexible production line for processing lathe spindle parts, includes the following steps: Step 1, the main control system detects that there is material on the first transfer table, and transmits control instructions to the walking base, the manipulator and the first high-rigidity CNC lathe, the walking base walks on the track to the first transfer table for positioning, the manipulator grabs the parts and transports them to the first high-rigidity CNC lathe, and the first high-rigidity CNC lathe completes the processing technology of fine turning the outer circle reference, the inner cone surface reference and the end face reference of the parts; Step 2, after the first high-rigidity CNC lathe completes the processing, the main control system is notified, the main control system transmits control instructions to the walking base and the manipulator, the walking base walks on the track to the first high The part is positioned at the rigid CNC lathe, and the manipulator grabs the part and transports it to the second transfer table, where the CNC center hole grinder is used to manually complete the processing technology of fine grinding the two end references of the part; Step three, the main control system detects that there is material on the second transfer table, and transmits control instructions to the walking base, the manipulator and the second high-rigidity CNC lathe. The walking base walks on the track to the second transfer table for positioning, and the manipulator grabs the part and transports it to the second high-rigidity CNC lathe, where the second high-rigidity CNC lathe completes the processing technology of fine turning the outer circle, outer cone and end face of the part; Step four, after the second high-rigidity CNC lathe completes the processing, the main control system is notified, and the main control system transmits control instructions to the walking base, the manipulator and the third high-rigidity CNC lathe Instructions are given, the walking base walks on the track to the second highest rigidity CNC lathe for positioning, the robot grabs the parts and moves them to the third highest rigidity CNC lathe, and the third highest rigidity CNC lathe completes the processing technology of finishing the large end outer circle, inner and outer cone surfaces, end surface and outer circle groove of the parts; Step five, after the third highest rigidity CNC lathe completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the robot and the horizontal machining center, the walking base walks on the track to the third highest rigidity CNC lathe for positioning, the robot grabs the parts and moves them to the horizontal machining center, and the horizontal machining center completes the processing technology of boring, tapping and milling keyways of the parts; Step six, after the horizontal machining center completes the processing, it notifies the main Control system, the main control system transmits control instructions to the walking base and the manipulator, the walking base walks on the track to the horizontal machining center for positioning, the manipulator grabs and transports it to the third transfer table, and the manual line completes the parts heat treatment qualitative, the two end references are finely ground by the center hole grinder, and the fourth high-rigidity CNC lathe is used to finely turn the threads; Step seven, the main control system detects that there is material on the fourth transfer table, and transmits control instructions to the walking base, the manipulator and the third CNC end face external cylindrical grinder. The walking base walks on the track to the fourth transfer table for positioning, the manipulator grabs the parts and transports them to the third CNC end face external cylindrical grinder, and the third CNC end face external cylindrical grinder completes the parts fine grinding of the outer circle and end face processing technology;Step 8, after the third CNC end face external cylindrical grinder is completed, the main control system is notified, and the main control system transmits control instructions to the walking base, the manipulator and the second CNC end face external cylindrical grinder. The walking base walks on the track to the third CNC end face external cylindrical grinder for positioning, and the manipulator grabs the parts and transports them to the second CNC end face external cylindrical grinder, which completes the processing technology of fine grinding the outer cone surface of the spindle bearing installation by the second CNC end face external cylindrical grinder; Step 9, after the second CNC end face external cylindrical grinder is completed, the main control system is notified, and the main control system transmits control instructions to the walking base, the manipulator and the first CNC end face external cylindrical grinder, and the walking base The base moves on the track to the second CNC end face external cylindrical grinder for positioning, and the robot grabs the part and moves it to the first CNC end face external cylindrical grinder, where the first CNC end face external cylindrical grinder completes the processing technology of grinding the part spindle and chuck combined external cone and end face; Step 10: After the first CNC end face external cylindrical grinder is completed, the main control system is notified, and the main control system transmits control instructions to the walking base and the robot, and the walking base moves on the track to the first CNC end face external cylindrical grinder for positioning, and the robot grabs the part and moves it to the fifth transfer table, where the processing technology of fine grinding the inner cone of the part is completed manually through a special CNC internal cylindrical grinder. ;

[0015] The beneficial effects of the present invention are:

[0016] The present invention is designed based on production rhythm, processing flexibility and manufacturing accuracy. By scheduling the turnover device and the material temporary storage device to exchange information with the main control system, the production logistics is scheduled and controlled to form a flexible automatic production line with automatic and manual mixed flow, so as to improve production efficiency. By the material processing device and the main control system, the main control system controls the processing procedures of each CNC machine tool, thereby realizing each processing procedure and mastering the processing rhythm.

[0017] In addition, since the high-rigidity CNC lathe is equipped with a tool setting module, a workpiece detection module, a tool monitoring module and a thermal compensation module, and the CNC end face cylindrical grinder adopts a large variable diameter measuring frame, the main control system can obtain real-time information such as tool wear, outer diameter, inner diameter, length and other dimensions of the processed parts, torque changes, and temperature readings during the processing, so as to perform error compensation, improve the manufacturing accuracy and quality stability of spindle parts, and thereby improve the reliability and accuracy stability of the CNC lathe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall configuration of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the manipulator of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a high-rigidity CNC lathe of a material processing device of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a programmable controller and a high-definition network infrared all-in-one machine of a high-rigidity CNC lathe of a material processing device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of a PLC information interaction module on a high-rigidity CNC lathe of a material processing device of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the first transfer table of the material temporary storage device of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the second transfer table of the material temporary storage device of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the computer and main control cabinet of the main control system of the present invention;

[0026] Fig. 9 This is a schematic diagram of the internal structure of the main control cabinet of the present invention;

[0027] Figure 1 —9, 1—manipulator, 2—track, 3—first high-rigidity CNC lathe, 4—second high-rigidity CNC lathe, 5—third high-rigidity CNC lathe, 6—CNC center hole grinder, 7—special CNC internal grinder, 8—first CNC end face external grinder, 9—second CNC end face external grinder, 10—third CNC end face external grinder, 11—horizontal machining center, 12—static pressure guide rail, 13—tool setting module, 14—workpiece detection module, 15—tool monitoring module, 16—thermal compensation module, 17—programmable controller, 18—first turntable, 19— —Second transfer table, 20—Third transfer table, 21—Fourth transfer table, 22—Fifth transfer table, 23—Top table, 24—Tooling components, 25—Computer, 26—Main control cabinet, 27—PLC information interaction module, 28—Tentacle sensor, 29—High-definition network infrared all-in-one machine, 30—Network hard disk recorder, 31—Sixth transfer table, 32—Seventh transfer table, 33—Eighth transfer table, 34—Ninth transfer table, 35—Tenth transfer table, 36—Center hole grinder, 37—Fourth high rigidity CNC lathe, 38—Loading bin, 39—Lower bin. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Figure 1 As shown, the present invention is a flexible production line for lathe spindle parts processing, and the flexible production line for lathe spindle parts processing includes a material scheduling and turnover device, a material temporary storage device, a material processing device and a main control system. The material turnover device is composed of a manipulator 1, a walking base and a track 2. The manipulator 1 can walk and position on the track 2 through the walking base. The manipulator 1 and the walking base exchange information with the main control system respectively; the material processing device is arranged on both sides of the track 2, and is composed of a number of CNC machine tools, and each CNC machine tool exchanges information with the main control system; the material temporary storage device is composed of a number of transfer tables, and a number of transfer tables are arranged between each CNC machine tool, and exchange information with the main control system; the walking base and the manipulator 1 can receive control instructions from the main control system, and according to the control instructions, grab the lathe spindle parts on the material temporary storage device or the material processing device, and transport them to the designated material temporary storage device or material processing device. The walking base of the material turnover device adopts the product of Shenzhen Siasun Technology Co., Ltd. The walking base is equipped with a helical gear, a rack, a medium inertia and large torque servo motor and a walking wheel; the medium inertia and large torque servo motor drives the walking wheel to rotate through the gear and rack, thereby realizing the walking action on the track 2.

[0030] like Figure 2 As shown, the manipulator 1 of the material turnover device adopts a 165Kg robot provided by Shenzhen Siasun Technology Co., Ltd. The manipulator 1 is a multi-joint manipulator 1. Taking into account the weight and variety of spindle parts of CNC lathes and the spindle precision requirements, a joint robot with a strong load-bearing capacity is selected to achieve the grasping of spindle parts; in order to avoid rigid collision between the loading process of the manipulator and the clamping process of the machine tool, a follow-up function is provided at the end of the manipulator. The grasping component of the manipulator 1 is composed of four pneumatic claws, and the four pneumatic claws form two pairs of large-stroke split double-claw structures that can grasp the lathe spindle parts, thereby satisfying the grasping and handling actions of the lathe spindle parts. The track 2 of the material turnover device is a product of Shenzhen Siasun Technology Co., Ltd. The track 2 is a high-precision linear guide rail and is equipped with a digital control lubrication system. The digital control lubrication system adopts JS-G3-D2-N produced by Nanjing Beiqier. During the walking process of the walking base, the digital control lubrication system scientifically and reasonably adds lubricating oil to the linear guide rail slider and gear rack, thereby ensuring the linear movement accuracy and service life of the ground rail and effectively reducing the operating noise.

[0031] The material processing device of the flexible production line for machining the lathe spindle parts is composed of a first high-rigidity CNC lathe 3, a second high-rigidity CNC lathe 4, a third high-rigidity CNC lathe 5, and a CNC center hole grinder 6, which are arranged on one side of the running track 2 and are arranged in a row, and a special CNC internal cylindrical grinder 7, a first CNC end face external cylindrical grinder 8, a second CNC end face external cylindrical grinder 9, a third CNC end face external cylindrical grinder 10, and a horizontal machining center 11, which are arranged on the other side of the running track 2 and are arranged in a row; Figure 3—5, among which the high rigidity CNC lathe adopts the independently developed CY-CTC40100, the CNC center hole grinder 6 adopts the 2MK9418 produced by Xinxiang Risheng CNC Bearing Equipment Co., Ltd., the special CNC internal cylindrical grinder 7 adopts the H403-AE produced by Shanghai Machine Tool Works, the CNC end face external cylindrical grinder adopts the H234 produced by Shanghai Machine Tool Works, and the horizontal machining center 11 adopts the KHC80 produced by Shenyang Machine Tool Group Kunming Machine Tool Co., Ltd. The high-rigidity CNC lathe adopts a hydrostatic guide rail 12, and is also equipped with a tool setting module 13, a workpiece detection module 14, a tool monitoring module 15 and a thermal compensation module 16; the tool setting module 13 is specifically the TT30 produced by Marposs, and by establishing five subroutines on the CNC system: MTS_ALM.SPF, MTS_APU.SPF, MTS_CPU.SPF, MTS_INI.SPF, MTS_PU.SPF, the corresponding subroutine is called as needed when using the tool setting instrument, and the error compensation value is sent to the tool compensation storage after tool wear and tool change; the workpiece detection module 14 uses T25S produced by Marposs. By establishing MPL_X and MPL_Z measurement programs on the CNC system, different detection programs are called during measurement to complete on-machine detection of the outer diameter, inner diameter, length and other dimensions of the processed parts, and make timely judgments on the processing process to avoid batch scrap; the tool monitoring module 15 is a torque sensor, which is used to monitor the torque change during the processing process, and the thermal compensation module 16 is a temperature sensor, which is arranged on the guide rails of the X-axis and Z-axis of the machine tool to read temperature information, monitor the machine tool shutdown and cooling in real time, and the processing temperature rise process, and perform error compensation in real time to improve the processing accuracy. The high-rigidity CNC lathe adopts the hydrostatic guide rail 12 design, and the machine tool has developed tool monitoring, thermal compensation, and automatic online measurement functions for workpieces, replacing the traditional grinding method to realize the hard turning process of the spindle parts after hardening heat treatment, ensuring the surface finish and accuracy of the parts, and improving production efficiency. The CNC end face external cylindrical grinder uses a large variable diameter measuring frame connected to the gantry through a flip cylinder, and a radial gauge module is installed inside the machine. The radial gauge module uses the THRUVAR5 produced by Marposs. Since multiple external cylindrical parts need to be ground on a grinder, and the sizes are different; therefore, the measuring frame is connected to the gantry through a flip cylinder. Before grinding, the measuring frame flips down to measure the outer diameter while grinding. After grinding to the size, the measuring frame flips up after exiting the processing. This on-machine detection method ensures the axial dimensional accuracy of the workpiece processing. Each CNC machine tool is equipped with an electric protective door, an electric spindle chuck, and an electric tailstock. It is also equipped with a programmable controller 17, which controls the CNC machine tool processing parameters.

[0032] The material temporary storage device of the flexible production line for lathe spindle parts processing includes five transfer tables. The first transfer table 18 is arranged on one side of the first high-rigidity CNC lathe 3. The second transfer table 19, the third transfer table 20, and the fourth transfer table 21 are arranged between the first high-rigidity CNC lathe 3 and the CNC center hole grinder 6. The fifth transfer table 22 is arranged between the first CNC end face external cylindrical grinder 8 and the special CNC internal cylindrical grinder 7. The transfer table is a box-type structure. The top of the box is provided with a transmission assembly that can drive the top table 23 to move. The top table 23 is provided with a tooling assembly 24 for supporting the spindle parts. The tooling assembly 24 is a symmetrically arranged V-shaped block. Figure 6 As shown, the transmission component of the first transfer table 18 in the above transfer table is a roller, such as Figure 7 As shown, the transmission components of the other transfer tables are linear guide rails, and the transmission components are controlled to open and close through control buttons.

[0033] like Figure 8As shown in FIG. 9 , the main control system of the flexible production line for lathe spindle parts processing is composed of a computer 25, a main control cabinet 26, a servo controller, a PLC information interaction module 27, an information transmission module and a sensor. The computer 25 is the input port of the main control cabinet 26. The main control cabinet 26 is connected to the servo controller of the servo motor, the manipulator 1, the PLC information interaction module 27 and the information transmission module by a network cable. The PLC information interaction module 27 adopts Siemens S7-400, and the information transmission module adopts industrial Ethernet to implement it. The computer 25 can send control instructions to the servo controller of the servo motor and the manipulator 1 through the main control cabinet 26, and the servo controller of the servo motor and the manipulator 1 interact with the main controller. A counter-shooting sensor is provided on the pneumatic clamping claw of the manipulator 1, and the counter-shooting sensor is used to detect whether there is material. The servo controller of the servo motor controls the servo motor in three ways: position, speed and torque, to achieve high-precision positioning of the transmission system. The programmable controller 17 of each CNC machine tool is respectively connected to a PLC information interaction module 27, and exchanges information with the main control system through the PLC information interaction module 27; the computer 25 can input processing parameters and operating instructions to the programmable controller 17 of each CNC machine tool through the main control cabinet 26 and the PLC information interaction module 27, and the programmable controller 17, tool meter module, workpiece detection module 14, tool monitoring module 15, thermal compensation module 16, and radial gauge module of each CNC machine tool feed back information to the computer 25 in real time through the main control cabinet 26 and the PLC information interaction module 27, so that the computer 25 can calculate and adjust the processing allowance, processing time, tool change compensation, processing waste, thermal positioning error, torque change, etc. of each production process, and plan the optimal processing and transportation path, thereby effectively improving production efficiency, and at the same time directly obtaining an inspection report. Several transfer tables are respectively provided with information transmission modules, and information is exchanged with the main control system through the information transmission modules. A whisker sensor 28 connected to the information transmission module is provided on the box of the transfer table, and the whisker sensor 28 is used to detect whether there is material on the transfer table.

[0034] The flexible production line for lathe spindle parts processing is rationally laid out. Track 2 of the material turnover device is set in the middle of the production line. Several CNC machine tools and transfer tables are lined up on both sides of track 2 according to process requirements. The arrangement direction is parallel to track 2, so that the robot can load and unload parts in the processing area, and it is also convenient for mixed flow processing of on-line and off-line equipment.

[0035] The control process of the flexible production line for lathe spindle parts processing realizes the following flexible processing under the control of the control system:

[0036] Step 1: After the main control system detects that there is material on the first transfer table 18 and the production line equipment is normal, it transmits control instructions to the walking base, the manipulator 1 and the first high-rigidity CNC lathe 3. The walking base walks on the track 2 to the first transfer table 18 for positioning, and the manipulator 1 grabs the parts and transports them to the first high-rigidity CNC lathe 3. The first high-rigidity CNC lathe 3 opens the protective door, the feed axis moves into the safe area, the spindle chuck opens, and the tailstock retracts to prepare for loading. The manipulator puts the parts in, the spindle chuck of the first high-rigidity CNC lathe 3 clamps the parts, the tailstock is tightened, the manipulator exits the processing area, and the protective door is closed. The first high-rigidity CNC lathe 3 completes the processing technology of the outer circle datum, inner cone surface datum and end surface datum of the parts.

[0037] Step 2: After the first high-rigidity CNC lathe 3 completes processing, it notifies the main control system, and the main control system transmits control instructions to the walking base and the manipulator 1. The walking base moves on the track 2 to the first high-rigidity CNC lathe 3 for positioning, and the manipulator 1 grabs the parts and transports them to the second transfer table 19. The CNC center hole grinder 6 manually completes the processing process of fine grinding the two end references of the parts.

[0038] Step three, the main control system detects that there is material on the second turntable 19, and transmits control instructions to the walking base, the manipulator 1 and the second high-rigidity CNC lathe 4. The walking base walks on the track 2 to the second turntable 19 for positioning, and the manipulator 1 grabs the parts and transports them to the second high-rigidity CNC lathe 4. The interactive control actions of the second high-rigidity CNC lathe 4 and the manipulator are consistent, and the second high-rigidity CNC lathe 4 completes the processing technology of fine turning the outer circle, outer cone and end face of the parts.

[0039] Step four, after the second high-rigidity CNC lathe 4 completes processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator 1 and the third high-rigidity CNC lathe 5. The walking base moves on the track 2 to the second high-rigidity CNC lathe 4 for positioning, and the manipulator 1 grabs the parts and transports them to the third high-rigidity CNC lathe 5. Similarly, the third high-rigidity CNC lathe 5 completes the processing technology of fine turning the large-end outer circle, inner and outer cone surfaces, end face and outer groove of the parts.

[0040] Step five, after the third high-rigidity CNC lathe 5 completes processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator 1 and the horizontal machining center 11. The walking base moves on the track 2 to the third high-rigidity CNC lathe 5 for positioning, and the manipulator 1 grabs the parts and transports them to the horizontal machining center 11, which completes the processing technology of boring, tapping and keyway milling of the parts.

[0041] Step six, after the horizontal machining center 11 completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base and the manipulator 1. The walking base walks on the track 2 to the horizontal machining center 11 for positioning, and the manipulator 1 grabs and transports it to the third transfer table 20. The parts are manually heat treated for qualitative analysis, the two end references are finely ground by the center hole grinder, and the threads are finely turned by the fourth high-rigidity CNC lathe.

[0042] Step seven, the main control system detects that there is material on the fourth turntable 21, and transmits control instructions to the walking base, the manipulator 1 and the third CNC end face external cylindrical grinder 10. The walking base walks on the track 2 to the fourth turntable 21 for positioning, the manipulator 1 grabs the parts and transports them to the third CNC end face external cylindrical grinder 10, which completes the processing technology of fine grinding the outer circle and end face of the parts.

[0043] Step eight, after the third CNC end face external cylindrical grinder 10 completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator 1 and the second CNC end face external cylindrical grinder 9. The walking base walks on the track 2 to the third CNC end face external cylindrical grinder 10 for positioning, and the manipulator 1 grabs the parts and transports them to the second CNC end face external cylindrical grinder 9. The second CNC end face external cylindrical grinder 9 completes the processing technology of fine grinding the parts to install the 1:12 outer cone surface of the spindle bearing.

[0044] Step nine, after the second CNC end face external cylindrical grinder 9 completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator 1 and the first CNC end face external cylindrical grinder 8. The walking base walks on the track 2 to the second CNC end face external cylindrical grinder 9 for positioning, and the manipulator 1 grabs the parts and transports them to the first CNC end face external cylindrical grinder 8. The first CNC end face external cylindrical grinder 8 completes the processing technology of the part grinding spindle and the chuck combined with the 1:4 external cone surface and the end surface.

[0045] Step ten, after the first CNC end face external cylindrical grinder 8 completes processing, it notifies the main control system, and the main control system transmits control instructions to the walking base and the manipulator 1. The walking base walks on the track 2 to the first CNC end face external cylindrical grinder 8 for positioning, and the manipulator 1 grabs the parts and transports them to the fifth transfer table 22. The special CNC internal cylindrical grinder 7 is used to manually complete the processing technology of fine grinding the 1:20 inner cone surface of the parts.

[0046] Traditional spindle processing generally uses various single machines and homemade equipment for processing in sequence. This processing and manufacturing mode has poor precision stability, low production efficiency, and poor dimensional consistency of parts, which cannot meet the processing needs of precision lathe spindle parts. This production line uses automatic clamping, high-rigidity turning instead of rough grinding, automatic detection and compensation precision grinding and other technologies to achieve efficient and precise processing; through process equipment capability matching and automated transfer system, beat balance and efficient production are achieved. The group technology is used to achieve the typical structure and process feature processing capabilities of the machine tool spindle series, so that the production line has flexible processing capabilities.

[0047] It should be noted that the first transfer table 18 is provided with three workstations, which adopt the roller conveying method. After the manual crane puts the material in place, press the start button to enter the automatic program, the roller line conveys, and after the sensor detects that it is in place, it stops conveying and notifies the main control system that the loading is completed. The three workstations are set according to the processing beat and the processing efficiency is calculated in detail. The number of workstations can also be increased or decreased according to the processing beat requirements of different parts. In addition, the second transfer table 19, the third transfer table 20, and the fourth transfer table 21 are arranged between the first high-rigidity CNC lathe 3 and the CNC center hole grinder 6. This is mainly because after the parts are processed in step five, they need to be manually heat treated and qualitatively processed outside the line, the two end references need to be fine-ground by the center hole grinder, and the threads need to be fine-turned by the fourth high-rigidity CNC lathe. After the processing, the parts need to enter the line again. Therefore, three transfer tables are set in this area. The second transfer table 19 is assigned to the parts processed in step two, the third transfer table 20 is assigned to the parts that need to be transported out of the line for processing, and the fourth transfer table 21 is assigned to the parts that re-enter the production line. Through such a setting, mixed flow processing inside and outside the production line is achieved.

[0048] Taking into account the simultaneous processing of multiple lathe spindle parts, a sixth turntable 31 is further provided between the second high-rigidity CNC lathe 4 and the third high-rigidity CNC lathe 5; a seventh turntable 32 is further provided on one side of the third high-rigidity CNC lathe 5; an eighth turntable 33 is further provided between the horizontal machining center 11 and the third CNC end face external cylindrical grinder 10; a ninth turntable 34 is further provided between the third CNC end face external cylindrical grinder 10 and the second CNC end face external cylindrical grinder 9; a tenth turntable 35 is further provided between the second CNC end face external cylindrical grinder 9 and the first CNC end face external cylindrical grinder 8; the transmission component of the seventh turntable 32 is a roller, and the transmission components of the remaining turntables are linear slide rails; the above-mentioned turntables can be used to temporarily store parts to be processed when each CNC machine tool executes processing instructions.

[0049] In order to bring the blank materials online, the finished parts offline, and the offline auxiliary processes, the flexible production line for lathe spindle parts processing is also equipped with a manual auxiliary line and a material bin. The material bin is lined up with the manual auxiliary line, and a crane is provided between the material bin and the automatic production line. The manual auxiliary line is composed of a center hole grinder 36 and a fourth high rigidity CNC lathe 37. The center hole grinder 36 and the fourth high rigidity CNC lathe 37 are used for manual off-line processing in step six. The material bin is composed of an upper bin 38 and a lower bin 39. The upper bin 38 is used to place the blank materials on the first transfer table 18, and the lower bin 39 is used to place the processed finished products.

[0050] In addition, in order to enable the main control system to more intuitively understand and view the operation status of the flexible production line for lathe spindle parts processing in real time, the flexible production line for lathe spindle parts processing is also equipped with a video monitoring device. The video monitoring device consists of a high-definition network infrared all-in-one machine 29 and a network hard disk recorder 30. The high-definition network infrared all-in-one machine 29 is installed in all CNC machine tool processing areas within the line. The network hard disk recorder 30 uses Hikvision's DS-7608N-E2 and is wired to the main control cabinet 26 of the main control system.

Claims

1. A flexible production line for lathe spindle parts processing, characterized by: The flexible production line for processing lathe spindle parts includes a material scheduling and turnover device, a material temporary storage device, a material processing device and a main control system; the material scheduling and turnover device is composed of a manipulator, a walking base and a track, the manipulator can walk and position on the track through the walking base, and the manipulator and the walking base respectively exchange information with the main control system; the material processing device is arranged on both sides of the track, and is composed of a number of CNC machine tools, and each CNC machine tool exchanges information with the main control system; the material temporary storage device is composed of a number of transfer tables, and the number of transfer tables are arranged between the CNC machine tools, and exchange information with the main control system; the walking base and the manipulator can receive control instructions from the main control system, and according to the control instructions, grab the lathe spindle parts on the material temporary storage device or the material processing device, and transport them to the designated material temporary storage device or material processing device; The walking base of the material dispatching and turnover device is provided with a bevel gear, a rack, a medium inertia and large torque servo motor and a walking wheel; the manipulator of the material dispatching and turnover device adopts a multi-joint manipulator, and the grasping assembly of the manipulator is composed of four pneumatic claws, and the four pneumatic claws form two pairs of large-stroke split double-claw structures that can grasp the lathe spindle parts; the track of the material dispatching and turnover device adopts a high-precision linear guide rail and is equipped with a digital control lubrication system; The material processing device is composed of a first high-rigidity CNC lathe, a second high-rigidity CNC lathe, a third high-rigidity CNC lathe, and a CNC center hole grinder, which are arranged on one side of the walking track and are arranged in a row, and a special CNC internal cylindrical grinder, a first CNC end face external cylindrical grinder, a second CNC end face external cylindrical grinder, a third CNC end face external cylindrical grinder, and a horizontal machining center, which are arranged on the other side of the walking track and are arranged in a row; the high-rigidity CNC lathe adopts a hydrostatic guide rail, and a tool setting module, a workpiece detection module, a tool monitoring module and a thermal compensation module are also arranged in the machine; the CNC end face external cylindrical grinder adopts a large-diameter measuring frame connected to the gantry through a turning cylinder, and a radial measuring instrument module is installed in the machine; each CNC machine tool is respectively provided with a programmable controller, and the CNC machine tool processing parameters are controlled by the programmable controller; The material temporary storage device includes five transfer tables, the first transfer table is arranged on one side of the first high-rigidity CNC lathe, the second transfer table, the third transfer table, and the fourth transfer table are arranged between the first high-rigidity CNC lathe and the CNC center hole grinder, and the fifth transfer table is arranged between the first CNC end face external cylindrical grinder and the special CNC internal cylindrical grinder; the transfer table is a box-type structure, the top of the box is provided with a transmission component that can drive the top table to move, the top table is provided with a tooling component for supporting the spindle parts, and the tooling component is a symmetrically arranged V-shaped block; the transmission component of the first transfer table is a roller, and the transmission components of the remaining transfer tables are linear slide rails; The main control system is composed of a computer, a main control cabinet, a servo controller, a PLC information interaction module, an information transmission module and a sensor. The computer is the input port of the main control cabinet. The main control cabinet is connected to the servo controller of the servo motor, the manipulator, the PLC information interaction module and the information transmission module through a network cable; the servo controller and the manipulator of the servo motor exchange information with the main controller, and the pneumatic clamping claw of the manipulator is provided with a shooting sensor; the programmable controller of each CNC machine tool is connected to the PLC information interaction module, and exchanges information with the main control system through the PLC information interaction module; several transfer tables are respectively provided with information transmission modules, and exchange information with the main control system through the information transmission modules, and a tentacle sensor connected to the information transmission module is provided on the box of the transfer table; The flexible production line for lathe spindle parts processing is also equipped with a manual auxiliary line and a material bin. The material bin is lined up with the manual auxiliary line, and a crane is installed between the material bin and the automatic production line. The manual auxiliary line is composed of a center hole grinder and a fourth-highest rigidity CNC lathe. The material bin is composed of an upper bin and a lower bin.

2. The flexible production line for lathe spindle parts processing according to claim 1 is characterized in that: The flexible production line for lathe spindle parts processing is also equipped with a video surveillance device, which consists of a high-definition network infrared all-in-one machine and a network hard disk recorder. The high-definition network infrared all-in-one machine is installed in all CNC machine tool processing areas within the line, and the network hard disk recorder is wired to the main control cabinet of the main control system.

3. The flexible production line for lathe spindle parts processing according to claim 2 is characterized in that: A sixth turntable is also provided between the second high-rigidity CNC lathe and the third high-rigidity CNC lathe; a seventh turntable is also provided on one side of the third high-rigidity CNC lathe; an eighth turntable is also provided between the horizontal machining center and the third CNC end face external cylindrical grinder; a ninth turntable is also provided between the third CNC end face external cylindrical grinder and the second CNC end face external cylindrical grinder; a tenth turntable is also provided between the second CNC end face external cylindrical grinder and the first CNC end face external cylindrical grinder; the transmission component of the seventh turntable is a roller, and the transmission components of the other turntables are linear slide rails.

4. A lathe spindle parts processing technology, the processing technology adopts the lathe spindle parts processing flexible production line according to claim 3, characterized in that: The following steps are included; Step 1: The main control system detects that there is material on the first transfer table, and transmits control instructions to the walking base, the manipulator and the first high-rigidity CNC lathe. The walking base moves on the track to the first transfer table for positioning, and the manipulator grabs the parts and transports them to the first high-rigidity CNC lathe. The first high-rigidity CNC lathe completes the processing technology of finishing the outer circle reference, inner cone surface reference and end surface reference of the parts; Step 2: After the first high-rigidity CNC lathe completes the processing, the main control system is notified, and the main control system transmits control instructions to the walking base and the manipulator. The walking base moves on the track to the first high-rigidity CNC lathe for positioning, and the manipulator grabs the parts and transports them to the second transfer table. The CNC center hole grinder is used to manually complete the processing technology of fine grinding the two end references of the parts; Step 3: The main control system detects that there is material on the second transfer table, and transmits control instructions to the walking base, the manipulator and the second high-rigidity CNC lathe. The walking base moves on the track to the second transfer table for positioning, and the manipulator grabs the parts and transports them to the second high-rigidity CNC lathe, which completes the processing technology of finishing the outer circle, outer cone and end face of the parts; Step 4: After the second high-rigidity CNC lathe completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator and the third high-rigidity CNC lathe. The walking base moves on the track to the second high-rigidity CNC lathe for positioning, and the manipulator grabs the parts and transports them to the third high-rigidity CNC lathe. The third high-rigidity CNC lathe completes the processing technology of finishing the large end outer circle, inner and outer cone surfaces, end surface and outer groove of the parts; Step 5: After the third high-rigidity CNC lathe completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator and the horizontal machining center. The walking base moves on the track to the third high-rigidity CNC lathe for positioning, and the manipulator grabs the parts and transports them to the horizontal machining center, which completes the processing technology of boring, tapping and milling keyways of the parts; Step 6: After the horizontal machining center completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base and the manipulator. The walking base moves on the track to the horizontal machining center for positioning, and the manipulator grabs and transports it to the third transfer table. The manual line completes the heat treatment of the parts, oil boiling and qualitative analysis, fine grinding of the two ends of the center hole grinder, and fine thread turning by the fourth high-rigidity CNC lathe. Step 7: The main control system detects that there is material on the fourth transfer table, and transmits control instructions to the walking base, the manipulator and the third CNC end face cylindrical grinder. The walking base moves on the track to the fourth transfer table for positioning, and the manipulator grabs the parts and transports them to the third CNC end face cylindrical grinder, which completes the processing technology of fine grinding the outer circle and end face of the parts; Step 8: After the third CNC end face external cylindrical grinder completes the processing, the main control system is notified, and the main control system transmits control instructions to the walking base, the manipulator and the second CNC end face external cylindrical grinder. The walking base walks on the track to the third CNC end face external cylindrical grinder for positioning, and the manipulator grabs the parts and transports them to the second CNC end face external cylindrical grinder, which completes the processing technology of fine grinding the outer cone surface of the spindle bearing installation by the second CNC end face external cylindrical grinder; Step nine, after the second CNC end face external cylindrical grinder completes the processing, it notifies the main control system, and the main control system transmits control instructions to the walking base, the manipulator and the first CNC end face external cylindrical grinder, and the walking base walks on the track to the second CNC end face external cylindrical grinder for positioning, and the manipulator grabs the part and transports it to the first CNC end face external cylindrical grinder, and the first CNC end face external cylindrical grinder completes the processing technology of the part grinding spindle and the chuck combined outer cone and end face; Step 10. After the first CNC end face external cylindrical grinder completes processing, it notifies the main control system. The main control system transmits control instructions to the walking base and the manipulator. The walking base moves on the track to the first CNC end face external cylindrical grinder for positioning. The manipulator grabs the parts and moves them to the fifth transfer table. The special CNC internal cylindrical grinder is used to manually complete the processing process of fine grinding the inner conical surface of the parts.

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