Hydraulic column remanufacturing production line and remanufacturing production process

Abstract

The application discloses a hydraulic stand column remanufacturing production line and a remanufacturing production process, which comprises a cylinder body repairing production line and a hydraulic part assembling production line arranged on two sides of a main channel; the cylinder body repairing production line comprises a process joint welding area, a raw material storage area, a repairing line raw material storage area, an outer circular surface repairing area, an inner circular surface repairing area, a honing buffer area, a deep hole honing area and a process joint cutting area which are sequentially arranged; the hydraulic part assembling production line comprises an assembling line raw material storage area, an assembling line material storage area, a cylinder body cleaning area, an assembling A area, an assembling B area and an assembling finished product storage area which are sequentially arranged; and workpieces are transferred through a truss mechanical hand and an AGV trolley. The application can automatically realize the automatic surface repairing operation and the automatic assembling operation of heavy cylinder workpieces, has high automation degree, can greatly save labor cost, improves work efficiency and production efficiency, and can effectively guarantee the assembling quality.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of assembly equipment, and particularly relates to a hydraulic stand column remanufacturing production line and a remanufacturing production process. BACKGROUND

[0002] The support shed frame currently used needs to provide considerable supporting force to meet the use requirements, and therefore the lifting of the support frame driven by the hydraulic stand column is usually adopted to realize the supporting structure of the jack. Meanwhile, based on the requirement of the supporting height, the hydraulic stand column usually adopts a three-stage structure composed of an outer cylinder, a middle cylinder and a movable column. Therefore, the supporting and protecting device has a large size and weight, and is usually in the order of tens of tons, which is difficult to carry and install. Meanwhile, since the hydraulic stand column is used in the coal mine underground environment for a long time, the surface of the outer cylinder is severely corroded, and the working surface in the cylinder is severely worn, and therefore needs to be regularly inspected and timely replaced. Based on the characteristics of the large size and weight, the surface repair work is usually carried out by using different machining machines for different processes, and the traditional clamping positioning and manual operation are usually adopted in each machine, and the automatic connection between different processes is difficult to realize, which leads to a long repair processing period, requires a large amount of human resources, and the processing quality is difficult to guarantee the consistent standard.

[0003] At present, the assembly of the small hydraulic cylinder is usually carried out by manual operation or simple automatic assembly equipment on the production line, such as the automatic hydraulic cylinder assembly equipment disclosed in Chinese Patent Application CN110605574A, the hydraulic cylinder assembly automatic assembly equipment disclosed in Chinese Patent Application CN114654239A, and the hydraulic cylinder assembly automatic assembly equipment disclosed in Chinese Patent Application CN115816072A.

[0004] However, the above equipment is not suitable for the tens of tons of hydraulic stand columns used for supporting and protecting devices, and the lifting is usually adopted to realize the position transfer, and the manual operation is usually adopted to realize the assembly positioning adjustment through the horizontal moving device, which can meet the assembly precision requirement, but the automation degree is not high, and the production efficiency is low. At present, the integrated production line for the automatic repair and automatic assembly of the heavy cylinder assembly has not been found in the industry. SUMMARY

[0005] To solve the above technical problems, the application provides a hydraulic stand column remanufacturing production line and a remanufacturing production process, which can automatically realize the automatic repair and assembly of the heavy assembly, has a high automation degree, can greatly save the labor cost, improves the work efficiency and production efficiency, and can effectively guarantee the assembly quality of the hydraulic stand column.

[0006] To solve the above technical problems, the application adopts one technical scheme:

[0007] A hydraulic column remanufacturing production line, comprising a cylinder body repair production line and a hydraulic component assembly production line arranged on both sides of a main channel, the cylinder body repair production line comprising a process joint welding area, a raw material storage area, a repair line raw material storage area, an outer cylindrical surface repair area, an inner cylindrical surface repair area, a honing buffer area, a deep hole honing area, and a process joint cutting area arranged in sequence;

[0008] The process joint welding area is used for welding the process joint at the non-cylinder port end of the outer cylinder and preparing the reference outer cylindrical surface of the outer wall of the cylinder body;

[0009] The outer cylindrical surface repair area is used for surface layer repair and finishing machining of the outer cylindrical surface of the middle cylinder and the piston rod;

[0010] The inner cylindrical surface repair area is used for surface layer repair of the inner cylindrical surface of the outer cylinder and the middle cylinder;

[0011] The deep hole honing area is used for finishing machining of the inner cylindrical surface of the outer cylinder and the middle cylinder;

[0012] The process joint cutting area is used for cutting the process joint at the non-cylinder port end of the outer cylinder;

[0013] The hydraulic component assembly production line comprises an assembly line raw material storage area, an assembly line material storage area, a cylinder body cleaning area, an assembly A area, an assembly B area, and an assembly finished product storage area arranged in sequence;

[0014] The cylinder body cleaning area is used for cleaning each cylinder body before assembly;

[0015] The assembly A area is used for automatic assembly between the outer cylinder and the middle cylinder to form an outer cylinder and middle cylinder assembly;

[0016] The assembly B area is used for automatic assembly between the piston rod and the outer cylinder and middle cylinder assembly;

[0017] In each machining area, the workpiece is transferred between stations by a truss manipulator, and the workpiece is transferred between areas by an AGV trolley.

[0018] A hydraulic column remanufacturing production process is also provided, which is applied to the aforementioned dedicated hydraulic column remanufacturing production line and divided into a cylinder part repair stage and a repaired cylinder part assembly stage;

[0019] The cylinder part repair stage comprises the following steps:

[0020] In the process joint welding area, the process joint at the non-cylinder port end of the outer cylinder is welded and the reference support outer cylindrical surface of the outer surface of the middle part of the cylinder body is prepared;

[0021] In the outer cylindrical surface repair area, the outer cylindrical surface of the middle cylinder / piston rod is repaired;

[0022] The inner circle surface of the outer cylinder / middle cylinder is automatically repaired in the inner circle surface repairing area respectively;

[0023] The inner circle surface of the outer cylinder / middle cylinder is automatically finished, and the cutting of the welding process joint of the non-cylinder end of the outer cylinder is automatically finished in the deep hole honing area respectively;

[0024] The repaired cylinder part assembly stage comprises the following steps:

[0025] The surface cleaning of the outer cylinder, the middle cylinder and the piston rod is automatically completed in the corresponding cylinder cleaning area respectively;

[0026] The assembly between the middle cylinder and the outer cylinder is automatically completed in the outer cylinder and middle cylinder assembly area, and the outer cylinder and middle cylinder assembly is formed;

[0027] The assembly between the piston rod and the outer cylinder and middle cylinder assembly is automatically completed in the piston rod and outer cylinder and middle cylinder assembly assembly area;

[0028] Wherein, the workpiece is transferred between stations by the truss manipulator in each processing area, and the workpiece is transferred between areas by the AGV trolley.

[0029] Compared with the prior art, the beneficial effects of the present application are as follows:

[0030] The present application can realize the repair and remanufacturing operation of each component of the waste hydraulic stand by setting the cylinder repair production line, and can realize the assembly operation of each repaired component by setting the hydraulic part assembly production line, and can realize the material operation between different operation areas by the AGV trolley and the material operation in each operation area by the truss manipulator, so as to realize the efficient, high-precision and high-quality automatic remanufacturing production operation process of the waste hydraulic stand, save labor cost and have significant economic benefits.

[0031] The present application can realize the repair and remanufacturing operation of each component of the waste hydraulic stand by setting the cylinder repair production line, and can realize the assembly operation of each repaired component by setting the hydraulic part assembly production line, and can realize the material operation between different operation areas by the AGV trolley and the material operation in each operation area by the truss manipulator, so as to realize the efficient, high-precision and high-quality automatic remanufacturing production operation process of the waste hydraulic stand, save labor cost and have significant economic benefits.

[0032] The application can realize high-quality repair of the cylinder surface at low cost by adopting the process of rough turning to remove the surface layer of raw materials, laser cladding of new materials, fine turning to trim the surface of the cladding layer and polishing the surface after fine turning, and can realize high-quality repair of the cylinder surface at low cost by adopting the process of rough turning to remove the surface layer of raw materials, rough boring to remove the surface layer of deep holes, laser cladding of new materials, fine turning to trim the surface of the cladding layer of the cylinder port, fine boring to trim the surface of the cladding layer of the deep hole, honing of the surface of the deep hole after fine boring, the overall performance of the repaired layer is better than that of the raw material, thereby improving the overall service life of the cylinder;

[0033] The hydraulic cylinder automatic assembly machine with the automatically adjustable support position is adopted, automatic adjustment and coaxial matching of the center axis of the assembled cylinder part are realized, the efficiency is high, the precision is good, the assembly process is efficient and stable, and the hydraulic cylinder has good universality, high automation degree, can greatly save labor cost, improves work efficiency and production efficiency, and can effectively guarantee the assembly quality of the hydraulic cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a component structure schematic diagram of the hydraulic cylinder remanufacturing production line of the application;

[0035] Figure 2 It is a plane layout schematic diagram of the hydraulic cylinder remanufacturing production line of the application;

[0036] Figure 3 It is a raw material distribution schematic diagram of the raw material storage area of the application;

[0037] Figure 4 It is a structure schematic diagram of the process joint welding area of the application;

[0038] Figure 5 It is a structure schematic diagram between the right end of the outer surface repair area to A-A line of the application;

[0039] Figure 6 It is a structure schematic diagram between A-A line to the left end of the outer surface repair area of the application;

[0040] Figure 7 It is a structure schematic diagram between the right end of the inner surface repair area to B-B line of the application;

[0041] Figure 8 It is a structure schematic diagram between B-B line to C-C line of the inner surface repair area of the application;

[0042] Figure 9 It is a structure schematic diagram between C-C line to the left end of the inner surface repair area of the application;

[0043] Figure 10 It is a structure schematic diagram of the deep hole honing area of the application;

[0044] Figure 11 Structure diagram of the cylinder cleaning area between the left end and the E-E line of the cylinder cleaning area of the present application;

[0045] Figure 12 Structure diagram of the cylinder cleaning area between the E-E line and the F-F line of the cylinder cleaning area of the present application;

[0046] Figure 13 Structure diagram of the cylinder cleaning area between the F-F line and the G-G line of the cylinder cleaning area of the present application;

[0047] Figure 14 Structure diagram of the cylinder cleaning area between the G-G line and the H-H line of the cylinder cleaning area of the present application;

[0048] Figure 15 Structure diagram of the cylinder cleaning area between the H-H line and the right end of the cylinder cleaning area of the present application;

[0049] Figure 16 Structure diagram of the hydraulic column automatic assembly machine of the present application;

[0050] Figure 17 Structure diagram of the pressing device of the present application;

[0051] Figure 18 Structure diagram of the pressing plate in the down state of the present application;

[0052] Figure 19 Structure diagram of the internal structure of the pressing device of the present application;

[0053] Figure 20 Structure diagram of the horizontal telescopic mechanism and the upper part thereof of the present application;

[0054] Figure 21 Process flow diagram of the outer circular surface repair of the present application;

[0055] Figure 22 Process flow diagram of the inner circular surface repair of the present application;

[0056] Figure 23 Total process flow diagram of the hydraulic column automatic assembly process of the present application. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the scope of protection of the present application can be more clearly defined.

[0058] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0060] The present invention provides a hydraulic column remanufacturing production line and remanufacturing production process, which are used for surface repair of the main components of large hydraulic columns, namely the outer cylinder, the middle cylinder and the piston, and automatic self-matching between the repaired cylinder bodies to achieve remanufacturing and reuse, thereby improving the assembly efficiency and overall service life of the hydraulic column and reducing the manufacturing and use costs of the hydraulic column.

[0061] See attached Figures 1 to 20 The hydraulic column remanufacturing line consists of a cylinder repair line and a hydraulic parts assembly line, located on either side of the main aisle. The cylinder repair line primarily repairs the outer cylinder, middle cylinder, and piston working surfaces, while the hydraulic parts assembly line reassembles the repaired cylinders to form new hydraulic columns. Three visual signage displays on one side of the main aisle display the working status of each work area and various production information.

[0062] The processing machine tools involved in each production area are all existing equipment. The innovation of the present invention lies in that through the reasonable layout of various production equipment, the workpieces are transferred between workstations in each processing area by a truss robot, and the workpieces are transferred between different processing areas by an AGV cart. By compiling corresponding control programs, the automatic operation of the processing equipment in each processing area, the logical control of the process sequence such as material transfer of the truss robot and the AGV cart, and the process of setting process joint welding and cutting to achieve precise processing of the outer cylinder are realized. A special hydraulic column automatic assembly machine is designed to achieve automatic adjustment of the central axis of the cylinder workpiece and automatic and precise assembly between the workpieces, thereby realizing high-efficiency, high-precision, integrated and automated production of the repair and reassembly of the components of the heavy-duty hydraulic column.

[0063] like Figure 1As shown, the cylinder repair production line includes process joint welding area 1, raw material storage area 100, repair line raw material storage area 200, outer cylindrical surface repair area 2, inner cylindrical surface repair area 3, honing buffer area 300, deep hole honing area 4, and process joint cutting area 5 arranged in sequence. The hydraulic component assembly production line includes assembly line raw material storage area 400, assembly line material storage area 500, cylinder cleaning area 6, assembly area A 7, assembly area B 8, and assembly finished product storage area 600 arranged in sequence. The outer side of each working area is provided with a safety fence, and an emergency stop switch is arranged at a certain distance apart, so that personnel outside the fence can close the equipment nearby in case of an emergency, and a sensor interlocking device is added at each entrance and exit of the fence to detect whether other personnel enter the production area during the production process. Once unauthorized personnel enter the production area during the production process, an alarm signal is sent, and alarm information and the specific location of the alarm are fed back to the control center.

[0064] As shown in Figure 3 The raw material storage area 100 includes an outer cylinder upper part special rack 1001, a middle cylinder upper part special rack 1002, and a ram upper part special rack 1003, which are respectively used for placing the outer cylinder, middle cylinder, and ram to be processed. At least one set of V-shaped support seats is arranged on the top surface of each upper part special rack, so that the outer cylinder, middle cylinder, and ram to be repaired can be placed horizontally. The workpieces are transferred between different processing areas by AGV trolley, and the V-shaped support seats are used to support the workpieces, which can also effectively prevent the cylindrical workpieces from rolling during AGV trolley transportation. Since the hydraulic column works in the coal mine environment for a long time, the outer cylinder surface is usually severely rusted, and the outer cylinder itself weighs dozens of tons. If the outer cylindrical surface is directly used as the clamping position of the machine tool chuck, the center axis and the axis of the chuck will have a large deviation, which will have a great adverse effect on the subsequent inner wall surface processing. Especially when switching between different processes on different processing machines, it is difficult to ensure that the clamping positions of different chucks are uniform, so the processing reference of the previous and subsequent processes is inconsistent, which cannot guarantee the subsequent processing quality. Therefore, the production line specially sets the process joint welding area 1 outside the raw material storage area 100 (on the side away from the repair processing area), which is used for welding the process joint on the non-cylinder port end of the outer cylinder and preparing the reference cylindrical surface of the cylinder body. At the same time, the process joint cutting area 5 is arranged near the deep hole honing area 4 at the tail end of the repair processing area, which is used to cut off the process joint from the non-cylinder port end of the outer cylinder after the outer cylinder is repaired and processed.

[0065] As shown in Figure 4As shown, the process joint welding area 1 includes a first positioning tooling 101, a welding lathe 102, a welding robot 103, a first gantry manipulator 104, and a joint automatic feeding tooling 105. Before the process joint welding, the AGV trolley lifts the outer cylinder feeding special rack 1001 and the outer cylinder placed thereon in the raw material storage area 100, and then transports them to one side of the first positioning tooling 101 and places them down. The first gantry manipulator 104 grabs and transfers the outer cylinder to above the first positioning tooling 101 and releases it. The first positioning tooling 101 includes a tooling table, a positioning baffle fixedly arranged at one end of the top of the tooling table, two parallel guide rails fixedly arranged at the top of the tooling table, and two groups of V-shaped support roller groups. The two parallel guide rails are arranged perpendicular to the positioning baffle, and the top surface thereof is an inclined plane. The low end is located near the positioning baffle. One group of V-shaped support roller groups is fixedly arranged at the low end of the parallel guide rail, and the other group is movably arranged at the top of the parallel guide rail through a sliding block, and is driven by a linear driving device (such as a pneumatic cylinder, an electric cylinder, a gear and rack transmission mechanism, etc.) to move and position linearly along the parallel guide rail, so as to adjust the spacing of the two groups of V-shaped support roller groups to adapt to the support and positioning of columnar workpieces of different length specifications. When the outer cylinder is placed on the two groups of V-shaped support roller groups, the circumferential positioning of the outer cylinder is automatically completed. Under the action of its own gravity, the outer cylinder will relatively roll with the support roller and move downwardly and obliquely until the cylinder port end thereof abuts against the positioning baffle, and the axial positioning of the outer cylinder is completed. In this way, each outer cylinder to be processed can be positioned at the same position, the grabbing position of the first gantry manipulator 104 is always the same, and the positioning accuracy of the first gantry manipulator 104 at the subsequent machining station is further ensured.

[0066] The positioning tooling of each subsequent machining area has the same structure and positioning process as the first positioning tooling 101.

[0067] The first gantry robot 104 transfers the positioned outer cylinder to the welding lathe 102, and the chuck of the welding lathe 102 clamps the cylinder port end of the outer cylinder, so that the outer cylinder is fixed on the welding lathe 102, and the central axis of the outer cylinder is horizontally arranged. The process joint is a metal circular ring-shaped shaft sleeve. The joint automatic feeding tooling 105 includes a tooling table, an axial baffle fixedly arranged at one end of the top of the tooling table, and a push plate slidingly arranged on the top of the tooling table. The top of the tooling table is fixedly provided with a horizontal transverse positioning cylinder, the output shaft of which is parallel to the central axis of the outer cylinder, and the push plate is fixedly connected to the output shaft end. The top of the tooling table is also fixedly provided with a horizontal longitudinal positioning cylinder, the output shaft of which is perpendicular to the central axis of the outer cylinder, and the output shaft end is fixedly connected with a U-shaped embedding groove. When the output shaft of the horizontal longitudinal positioning cylinder is retracted, the U-shaped embedding groove is located between the push plate and the axial baffle, and the horizontal transverse positioning cylinder can push the process joint to the axial baffle through the push plate until the end face of the process joint abuts against the side face of the axial baffle, at this time, the process joint is located in the U-shaped embedding groove; then, the output shaft of the horizontal longitudinal positioning cylinder is extended, at this time, the process joint is located between the non-cylinder port end of the outer cylinder and the thimble of the welding lathe 102, the thimble is horizontally moved forward and inserted into the inside of the process joint, and the automatic coaxial positioning is realized through the contact between the conical surface of the thimble and the inner wall edge of the process joint, and the process joint is pushed out of the U-shaped embedding groove and abuts against the end face of the non-cylinder port end of the outer cylinder. Further, the welding robot 103 welds the process joint on the outer cylinder. After welding is completed, the thimble of the welding lathe is retracted, and the output shaft of the horizontal longitudinal positioning cylinder is retracted, so that the U-shaped embedding groove is reset between the push plate and the axial baffle.

[0068] After the process joint is sufficiently cooled, the thimble of the welding lathe 102 abuts against the process joint again, the chuck of the welding lathe 102 drives the outer cylinder to rotate, and the turning tool of the welding lathe 102 turns a certain width of annular cylinder on the complete cylindrical surface segment in the middle of the outer wall of the outer cylinder. The central axis of the annular cylinder coincides with the central axes of the outer cylinder and the process joint, and can be used as a common positioning reference for subsequent machining links.

[0069] The first gantry robot 104 regrasps and transfers the outer cylinder after welding and machining to the outer cylinder feeding special rack 1001 on one side of the first positioning tooling 101, and then the AGV trolley reversely transports the outer cylinder feeding special rack 1001 and the outer cylinder thereon to the original placement position of the outer cylinder feeding special rack 1001 in the raw material storage area 100.

[0070] Before the cylinder body parts are repaired, on-site production personnel manually select the specifications of incoming materials in the raw material storage area 200 of the repair line. The AGV selects the workpiece of corresponding specifications stored in the raw material storage area 100 based on the selection results, and then transfers the dedicated material rack for the workpiece and the workpiece to the raw material storage area 200 of the repair line and places them in the preset position. The on-site personnel then manually confirm the specifications of the incoming materials. After confirmation, the AGV then sends the middle cylinder and piston to the outer cylindrical surface repair area 2 to complete the subsequent outer cylindrical surface repair, and directly sends the outer cylinder to the inner cylindrical surface repair area 3 to complete the subsequent inner cylindrical surface repair. After the outer cylindrical surface repair of the middle cylinder is completed in the outer cylindrical surface repair area 2, the AGV transports it to the inner cylindrical surface repair area 3 to complete the subsequent inner cylindrical surface repair.

[0071] The outer cylindrical surface repair area 2 is used for surface repair and finishing of the outer cylindrical surface of the cylinder and piston. The following only takes the outer cylindrical surface repair process of the cylinder as an example to illustrate the equipment composition and processing process of the outer cylindrical surface repair area 2. Figure 5 and Figure 6 As shown, the outer cylindrical surface repair area 2 includes a second truss robot 201, a second positioning tool 202, at least one outer cylindrical rough turning machine 203, at least one outer cylindrical cladding machine 204, at least one outer cylindrical finishing machine 205, and at least one outer cylindrical polishing machine 206. To meet production needs and coordinate production tact, the outer cylindrical surface repair area 2 of this production line is equipped with one outer cylindrical rough turning machine 203 (40 minutes per machine per piece), three outer cylindrical cladding machines 204 (220 minutes per machine per piece), two outer cylindrical finishing machines 205 (90 minutes per machine per piece), and one outer cylindrical polishing machine 206 (50 minutes per machine per piece). At the same time, based on the process sequence and the overall size of each machine tool, two external cylindrical finishing machines 205 and one external cylindrical polishing machine 206 (50 minutes per machine per piece) are arranged in sequence along the main channel. One external cylindrical rough turning machine 203 and three external cylindrical cladding machines 204 are also arranged in sequence along the main channel. Loading buffers are located at the front end of the external cylindrical finishing machine 205 and the side of the external cylindrical rough turning machine 203 close to the main channel, while an unloading buffer is located at the rear end of the external cylindrical polishing machine 206. In the area between the two rows of machine tools, one second positioning fixture 202 and five first cooling fixtures 207 are located along the main channel. The first cooling fixtures 207 are used to cool the cylinder / plunger after the external cylindrical surface cladding process. The cooling time is set to 4 hours, which not only ensures sufficient cooling of the material layer after hot cladding but also meets the cladding cycle of the external cylindrical cladding machine 204. The five cooling fixtures meet the production and processing turnover needs of the three cladding machines. Each processing machine tool works continuously, performing the same process on the workpieces one by one, and stops appropriately to complete operations such as loading, unloading and maintenance of the workpieces.

[0072] like Figure 21As shown, during the repair production, the outer circle area workpiece processing work order is sent to the general control PLC by the production line information system, the general control PLC calls the material to the material management system (WMS), the WMS instructs the AGV trolley to transfer the middle cylinder in the raw material storage area 200 of the repair line to the feeding buffer area on the side of the second positioning tool 202, after the workpiece is positioned, the AGV trolley feeds the feeding information to the WMS, and then the outer circle surface repair area 2 starts the automatic processing process.

[0073] The second gantry robot 201 transfers the middle cylinder to the second positioning tool 202, and the second positioning tool 202 completes the positioning of the middle cylinder through the same positioning process as the first positioning tool 101. At this time, the AGV trolley transfers the empty middle cylinder feeding special rack 1002 to the corresponding unloading position of the middle cylinder in the unloading buffer area. The second gantry robot 201 transfers the positioned middle cylinder to the outer circle rough turning machine tool 203, and completes the clamping of the middle cylinder on the outer circle rough turning machine tool 203 in cooperation with the chuck and the ejector pin of the outer circle rough turning machine tool 203. After clamping is completed, the second gantry robot 201 is raised and reset, the outer circle rough turning machine tool 203 automatically turns the outer circle surface of the middle cylinder according to the preset turning total amount, number of times, single feeding amount and other parameters, and removes the surface layer of the raw material. After rough turning is completed, the outer circle rough turning machine tool 203 stops, the second gantry robot 201 grabs the middle cylinder, the ejector pin of the outer circle rough turning machine tool 203 retreats, the chuck is loosened, the second gantry robot 201 horizontally exits the chuck and then vertically lifts, and then transfers to the outer circle cladding machine tool 204, and completes the clamping of the middle cylinder on the outer circle cladding machine tool 24 in cooperation with the chuck and the ejector pin of the outer circle cladding machine tool 24. After clamping, the second gantry robot 201 releases the middle cylinder and is raised and reset, and the outer circle cladding machine tool 204 completes the cladding process of the new material on the outer circle surface of the middle cylinder according to the preset cladding parameters. After cladding is completed, the second gantry robot 201 clamps the middle cylinder again, the ejector pin of the outer circle cladding machine tool 24 retreats, the chuck is loosened, the second gantry robot 201 horizontally exits the chuck and then vertically lifts, and then transfers to the first cooling tool 207 for room temperature cooling.

[0074] After cooling is completed, the second gantry robot 201 grabs the middle cylinder again and transfers it to the outer circle finish turning machine tool 205 to complete the finish turning process of the outer surface of the cladding layer in the same process as on the outer circle rough turning machine tool 203. After finish turning is completed, the outer circle finish turning machine tool 205 stops, and the second gantry robot 201 transfers the finish turned middle cylinder to the outer circle polishing machine tool 206 to complete the clamping process. The outer circle polishing machine tool 206 works automatically and polishes the finish turned outer circle surface according to the preset processing parameters, so that the performance and size of the outer circle surface meet the process requirements. After polishing is completed, the outer circle polishing machine tool 206 stops, and the second gantry robot 201 grabs the middle cylinder and transfers it to the corresponding middle cylinder feeding special rack 1002 in the unloading buffer area, thereby completing the entire repair process of the outer circle surface of the outer cylinder.

[0075] The inner circular surface repair area 3 is used for the surface layer repair of the inner circular surface of the outer cylinder and the middle cylinder. The equipment composition and processing procedure of the inner circular surface repair area 3 are described below by taking the inner circular surface repair process of the outer cylinder as an example. As shown in Figs. Figure 7 、 Figure 8 and Figure 9 , the inner circular surface repair area 3 includes a third gantry robot 301, a third positioning tool 302, at least one cylinder port rough turning machine 303, at least one deep hole rough boring machine 304, at least one inner circular surface cladding machine 305 (including laser cleaning), at least one cylinder port fine turning machine 306, and at least one deep hole fine boring machine 307. To meet the production needs and coordinate the production rhythm, 1 cylinder port rough turning machine 303 (50 min per piece per machine), 1 deep hole rough boring machine 304 (100 min per piece per machine), 3 inner circular surface cladding machines 305 (270 min per piece per machine), 1 cylinder port fine turning machine 306 (90 min per piece per machine), and 1 deep hole fine boring machine 307 (140 min per piece per machine) are arranged in the inner circular surface repair area 3 in the production line. At the same time, according to the process sequence and the overall size of each machine, 1 cylinder port rough turning machine 303, 2 inner circular surface cladding machines 305, and 1 cylinder port fine turning machine 306 are arranged in sequence along the direction of the main channel, 1 inner circular surface cladding machine 305, 1 deep hole rough boring machine 304, and 1 deep hole fine boring machine 307 are arranged in sequence along the direction of the main channel, the front end side (the row close to the main channel) of the cylinder port rough turning machine 303 is provided with a feeding buffer area, and the rear end side (the row away from the main channel) of the deep hole fine boring machine 307 is provided with a discharging buffer area; at the same time, the area between the rear end of the deep hole rough boring machine 304 and the front end of the deep hole fine boring machine 307 is provided with 2 second cooling tools 308 and 1 first manual cleaning tool 309, the first manual cleaning tool 309 is used for cleaning (such as removing oil and rust) after the inner circular surface deep hole rough boring of the outer cylinder / middle cylinder, and the second cooling tool 308 is used for static cooling after the inner circular surface cladding. The tail end of the deep hole fine boring machine 307 and the side of the cylinder port fine turning machine 306 are provided with 2 third cooling tools 310 and 1 second manual cleaning tool 311, the third cooling tool 310 is used for static cooling after the cylinder port fine turning of the outer cylinder / middle cylinder, and the second manual cleaning tool 311 is used for cleaning after the inner circular surface deep hole fine boring of the outer cylinder / middle cylinder. Among them, the first manual cleaning tool 309 and the second manual cleaning tool 311 both adopt a two-point positioning type load table with horizontal movement, part of which is located inside the fence as a position for receiving and returning materials, and part of which is located outside the fence as a work area for manual cleaning to ensure the safety of the cleaning personnel.

[0076] As shown in Figs. Figure 22As shown, during the repair production, the inner circle area workpiece machining work order is sent to the general control PLC by the production line information system, the general control PLC calls the material to the material management system (WMS), the WMS instructs the AGV car to transfer the outer cylinder and the outer cylindrical surface repair area 2 in the raw material storage area 200 to the third positioning tool 302 on one side of the feeding buffer area, and the workpiece is in place. After the AGV car feeds the feeding information to the WMS, the inner circle surface repair area 3 starts the automatic machining process.

[0077] The third gantry robot 301 transfers the outer cylinder to the third positioning tool 302, and the third positioning tool 302 completes the positioning of the outer cylinder through the same positioning process as the foregoing positioning tool. At this time, the AGV car transfers the empty outer cylinder feeding special rack 1001 to the unloading position corresponding to the outer cylinder in the unloading buffer area. The third gantry robot 301 transfers the positioned outer cylinder to the cylinder port rough turning machine tool 303, and cooperates with the chuck and the ejector pin of the cylinder port rough turning machine tool 303 to complete the clamping of the outer cylinder on the cylinder port rough turning machine tool 303. For the clamping of the outer cylinder, the specific way is that the process joint welded at the non-cylinder port end of the outer cylinder is clamped by the chuck, and the annular cylindrical surface formed by turning the process joint welding area 1 in the middle part of the cylinder body is supported by the support rollers on both sides of the bottom. In this way, the outer cylinder can be driven to rotate by the chuck, the cylinder body of the outer cylinder can rotate relative to the support rollers at the bottom, the center axis position of the outer cylinder can be kept unchanged, and the turning tool can act on the cylinder port for turning operation. The clamping mode of the outer cylinder on each subsequent machining machine tool is the same, so that the clamping and machining reference of all processes can be kept consistent. After clamping is completed, the third gantry robot 301 rises and resets, the cylinder port rough turning machine tool 303 automatically turns the inner surface of the outer cylinder according to the preset turning total amount, number of times, single feed amount and other parameters, and removes the raw material on the surface. After rough turning is completed, the cylinder port rough turning machine tool 303 stops, the third gantry robot 301 grabs the outer cylinder, the ejector pin of the cylinder port rough turning machine tool 303 retreats, the chuck is loosened, the third gantry robot 301 horizontally exits the chuck and then vertically lifts, and then transfers to the deep hole rough boring machine tool 304. After clamping is completed by adopting the foregoing process, the third gantry robot 301 loosens the middle cylinder and rises and resets, the boring tool of the deep hole rough boring machine tool 304 continuously enters the cavity of the outer cylinder according to the preset boring parameters, and the cutting and removal of the raw material on the inner surface of the outer cylinder is completed during the continuous rotation of the outer cylinder. After rough boring is completed, the third gantry robot 301 clamps the outer cylinder again, the ejector pin of the deep hole rough boring machine tool 304 retreats, the chuck is loosened, the third gantry robot 301 horizontally exits the chuck and then vertically lifts, and then transfers to the first manual cleaning tool 309. The inside of the outer cylinder is manually cleaned by the cleaning operator.

[0078] After cleaning, the third gantry manipulator 301 again picks up the outer cylinder and transfers it to the third positioning tool 302 to complete the second positioning. Then the third gantry manipulator 301 transfers the positioned outer cylinder to the inner circle cladding machine tool 305. After clamping is completed, the powder jet of the inner circle cladding machine tool 305 extends into the cylinder body, continuously feeds along the axial direction, and completes the heat cladding process of the new material on the inner wall surface layer of the cylinder body in the process of continuous rotation of the outer cylinder. After cladding is completed, the third gantry manipulator 301 transfers the workpiece to the second cooling tool 308 to cool the cladded workpiece. The cooling time is still set to 4h. After cooling is completed, the third gantry manipulator 301 again picks up the outer cylinder and transfers it to the cylinder port fine turning machine tool 306 to complete the fine turning process of the inner wall surface (non-cladding area) of the cylinder port in the same process as the cylinder port rough turning machine tool 303. After fine turning is completed, the cylinder port fine turning machine tool 306 stops, the third gantry manipulator 301 transfers the outer cylinder to the third cooling tool 310 for standing cooling, and the cooling time is set to 1h. After cooling is completed, the third gantry manipulator 301 transfers the cylinder port fine turned outer cylinder to the deep hole fine boring machine tool 307, clamps it, and then the deep hole fine boring machine tool 307 automatically works according to the preset machining parameters to bore the cladded inner circle surface, so that the inner surface of the cladding layer is smooth. After fine boring is completed, the third gantry manipulator 301 transfers the outer cylinder to the second manual cleaning tool 311 for manual cleaning of the inside of the outer cylinder by the cleaning operator. After cleaning is completed, the third gantry manipulator 301 again picks up the outer cylinder and transfers it to the special rack 1001 for feeding the outer cylinder in the unloading buffer area.

[0079] The deep hole honing area 4 is used for finishing machining of the inner circle surface of the outer cylinder and the middle cylinder. After the inner wall of the large cylinder is fine bored, it enters the buffer area. The qualified pieces are transferred to the deep hole honing area 4 by the AGV trolley for honing according to the honing production arrangement. After honing is completed, the AGV trolley transfers them to the honing buffer area 300 for storage of the large cylinder semi-finished product. If the deep hole honing area 4 does not arrange production, the honing buffer area 300 is full, and the unqualified pieces are directly unloaded and delivered out of the warehouse by manual operation. Specifically, as shown in Figure 10 The deep hole honing area 4 includes a fourth gantry manipulator 401, a fourth positioning tool 402, and at least one deep hole honing machine tool 403. To meet the production needs and coordinate the production rhythm, two deep hole honing machine tools 403 (130min / tube / piece) are arranged in the deep hole honing area 4 in the production line, and are arranged parallel to the main channel. At the same time, the front end side (the side close to the inner circle surface repair area 3) of the deep hole honing machine tool 403 is respectively provided with an unloading buffer area and a feeding buffer area.

[0080] In the honing production, the production line information system sends the honing area work order to the general control PLC, the general control PLC calls the material to the WMS, the WMS instructs the AGV car to transfer the outer cylinder / middle cylinder in the honing buffer area 300 to the feeding buffer area, the AGV car feeds the feeding information to the WMS after the workpiece is in place, and then the deep hole honing area 4 starts the automatic processing process.

[0081] Still taking the honing operation of the outer cylinder as an example. The fourth gantry manipulator 401 transfers the outer cylinder to the fourth positioning tool 402, and the fourth positioning tool 402 completes the positioning of the outer cylinder through the same positioning process as the foregoing positioning tool. At this time, the AGV car transfers the empty outer cylinder feeding special rack 1001 to the unloading position corresponding to the outer cylinder in the unloading buffer area. The fourth gantry manipulator 401 transfers the positioned outer cylinder to the deep hole honing machine tool 403 and completes the clamping. The deep hole honing machine tool 403 works, automatically hones the area after the inner circular surface of the outer cylinder is precisely bored according to the preset honing processing parameters, so that the performance and size of the inner surface meet the process requirements, thereby completing the entire repair processing process of the workpiece.

[0082] The outer cylinder after the repair processing is transferred by the AGV car to the process joint cutting area 5, and the process joint previously welded at the non-cylinder port end of the outer cylinder is cut around through the cutting equipment. After the cutting, the outer cylinder is polished, and then is transferred by the AGV car to the assembly line raw material storage area 400 for storage, and the matching outsourcing parts (such as guide sleeves, half rings, dust covers, clamping springs, etc.) are also stored in the assembly line raw material storage area 400.

[0083] In the assembly operation, the production line information system sends the outer assembly line processing work order to the general control PLC, the general control PLC calls the material to the WMS, the WMS instructs the AGV car to transfer the outer cylinder, the middle cylinder and the piston rod in the assembly line raw material storage area 400 to the assembly line material storage area 500 respectively, and stores them in the way of 3 rows of parallel arrangement and single row of 9 material racks adjacent arrangement, and then the outer cylinder, the middle cylinder and the piston rod are sent to the outer cylinder cleaning machine 601, the middle cylinder cleaning machine 602 and the piston rod cleaning machine 603 respectively through the 3 special AGV cars for the cleaning operation before assembly; at the same time, the AGV car transfers the matching outsourcing parts to the assembly A area 7 (i.e. the outer cylinder and middle cylinder assembly area) and the assembly B area 8 (i.e. the piston rod and combined body assembly area) respectively, so as to complete the corresponding manual assembly operation process in the assembly process. The AGV car feeds the feeding information to the WMS after the workpiece is in place.

[0084] The cylinder body cleaning area 6 is used for the cleaning before assembly of each cylinder body. Specifically, for example, Figures 11 to 15As shown, the outer cylinder cleaning machine 601, the middle cylinder cleaning machine 602 and the piston rod cleaning machine 603 are sequentially arranged, and the outer cylinder cleaning machine 601 is located on the side close to the material storage area 500 of the assembly line, the assembly area A 7 is arranged between the outer cylinder cleaning machine 601 and the middle cylinder cleaning machine 602, the feeding directions of the two cleaning machines are both towards the outer cylinder cleaning machine 601, the piston rod cleaning machine 603 is arranged adjacent to the end of the middle cylinder cleaning machine 602, the assembly area B 8 is arranged at the end of the hydraulic component assembly production line, the feeding direction of the piston rod cleaning machine 603 is towards the assembly area B 8, so the piston rod cleaning machine 603 is adjacent to the feeding position of the middle cylinder cleaning machine 602 and can share a truss manipulator.

[0085] The middle cylinder cleaning machine 602 and the piston rod cleaning machine 603 are arranged between the outer cylinder cleaning machine 601 and the middle cylinder cleaning machine 602. Each cleaning area is provided with a cleaning tank 604, the cleaning tank 604 is provided with a chain conveyor 605, the top of the cleaning tank 604 is provided with a air drying device 608, the side of the cleaning tank 604 away from the main channel is provided with a clean water tank 606, a sewage tank 607 and a water supply device 609, the water supply device 609 adopts a horizontal reciprocating moving mechanism, a water supply pipe is arranged above the horizontal reciprocating moving mechanism, the port of the water supply pipe is provided with a jet nozzle, and a spray pipeline is arranged on the top of the cleaning tank 604, the spray pipeline is distributed on the top and the bottom of the outer cylinder, and a spray nozzle is arranged on the side facing the outer cylinder; the front end of the cleaning tank 604 is provided with a feeding buffer area, the rear end is provided with a discharging buffer area on the side close to the main channel, and the feeding buffer area and the top of the chain conveyor 605 are provided with a fifth truss manipulator 610.

[0086] For example, the corresponding AGV special car will transfer the outer cylinder in the assembly line material storage area 500 to the feeding buffer area of the outer cylinder cleaning machine 601, the fifth gantry manipulator 610 will grab and place the outer cylinder in the top placement seat of the chain conveyor 605, and the corresponding upper piece special rack will be transferred to the discharging buffer area by the AGV. The chain conveyor 605 steps to send the outer cylinder to the middle position of the cleaning tank 604, the water supply device 609 introduces the clean water in the clean water tank 606 into the jet nozzle through the water supply pipe and into the spray nozzle through the spray pipe, the horizontal reciprocating mechanism drives the water supply pipe and the jet nozzle to move horizontally, the jet nozzle uniformly disperses the water flow in the circumferential direction and continuously flushes the inner wall of the outer cylinder along the axis direction, and the horizontal reciprocating mechanism drives the water supply pipe and the jet nozzle to move horizontally. retreat, the inner wall of the outer cylinder is washed twice, and at the same time, the washed sewage flows into the cleaning tank 604 from the inside to the outside, and the sewage in the cleaning tank 604 flows into the sewage tank 607 through the return pipe; At the same time, the spray nozzle flushes the top and bottom of the outer surface of the outer cylinder, and the washed sewage flows into the cleaning tank 604, and the sewage in the cleaning tank 604 flows into the sewage tank 607 through the return pipe. After washing, the water supply device 609 stops supplying water, and the air drying device 608 works, using the same process as cleaning, to supply high-speed airflow to the inside of the cavity of the outer cylinder and the outer surface, so that the inner wall and the outer surface of the outer cylinder are quickly dried. After drying, the air drying device 608 also stops working, and the chain conveyor 605 steps to send the cleaned outer cylinder to the end of the discharging position, waiting to be grabbed for assembly, or placed on the corresponding upper piece special rack in the discharging buffer area, waiting for subsequent grabbing and assembly.

[0087] Assembly area A 7 is used for automatic assembly between outer cylinder and middle cylinder, forming an outer cylinder and middle cylinder combination. As shown in Figure 12 , the assembly area A 7 includes a special hydraulic column automatic assembly machine A701, a sixth gantry manipulator 702 located above the hydraulic column automatic assembly machine A701, a first manual assembly rack 703 located on one side of the hydraulic column automatic assembly machine A701, and the discharging end of the chain conveyor 605 of the outer cylinder cleaning machine 601 and the middle cylinder cleaning machine 602 is located on both sides of the hydraulic column automatic assembly machine A701. As shown in Figure 15 , the assembly area B 8 includes a special hydraulic column automatic assembly machine B801, a seventh gantry manipulator 802 located above the hydraulic column automatic assembly machine B801, a second manual assembly rack 803 and a connector assembly machine 804 located on both sides of the hydraulic column automatic assembly machine B801, and the discharging end of the chain conveyor 605 of the movable column cleaning machine 603 is located at the front end side of the hydraulic column automatic assembly machine B801.

[0088] Specifically, as shown in Figure 16As shown, the dedicated hydraulic cylinder automatic assembly machine A701 includes a rack 7011, on which the conventional functional components required by the assembly equipment such as the electric control system, the pneumatic system, the servo system, the safety device and the protective cover are matched and arranged, all of which are prior art and will not be described here. The rear top support plate 7012 is fixedly arranged at the top rear end of the rack 7011, and the press-fitting device is arranged at the top front end and can move horizontally. Two groups of outer cylinder support frame assemblies 7013 that can move horizontally are arranged at one side of the top of the rack 7011 close to the rear top support plate 7012, and two groups of middle cylinder piston rod support frame assemblies 7014 that can move horizontally are arranged at one side close to the press-fitting device.

[0089] The rear top support plate 7012 is vertically fixedly arranged on the rack 7011, and its working surface faces the press-fitting device for positioning the rear end of the outer cylinder to be assembled. The outer cylinder support frame assembly 7013 is arranged in two groups, and a liftable V-shaped support frame is used to support the main part of the outer cylinder with a cylindrical structure. The two V-shaped support frames cooperate with each other and adjust the position of the center axis of the outer cylinder in a two-point-one-line manner. V-shaped pre-support frames are arranged at both sides of the V-shaped support frame for initial placement of the outer cylinder during feeding. The two groups of outer cylinder support frame assemblies 7013 are transferred from the placement station to the assembly station by synchronous horizontal movement. The rear top support plate 7012 has a position detection sensor (not shown in the figure) for detecting whether the outer cylinder is placed on the outer cylinder support frame assembly 7013 and whether the outer cylinder reaches the preset assembly station, and then the electric control system and the servo system are used to control the outer cylinder support frame assembly 7013 to stop moving. The two groups of outer cylinder support frame assemblies 7013 move horizontally respectively, and during the adjustment of the distance between them, the position detection sensor arranged on them is used to detect and control them to stop moving after they are in place. Similarly, the middle cylinder piston rod support frame assembly 7014 is also arranged in two groups, and a liftable waist-shaped support roller is used to support the cylinder part of the middle cylinder or the piston rod with a cylindrical structure. The two waist-shaped support rollers cooperate with each other and adjust the position of the center axis of the outer cylinder in a two-point-one-line manner. During the process of horizontal movement of the middle cylinder or the piston rod pushed by the press-fitting device to complete the assembly, the middle cylinder or the piston rod can roll relative to the waist-shaped support roller. V-shaped pre-support frames are also arranged at both sides of the waist-shaped support roller for initial placement of the middle cylinder or the piston rod during feeding. The two groups of middle cylinder piston rod support frame assemblies 7014 are transferred from the placement station to the assembly station by synchronous horizontal movement, and then the position detection sensor arranged on them is used to detect and control them to stop moving after they are in place.

[0090] The two sets of outer cylinder support frame assemblies 7013 and the two sets of middle cylinder plunger support frame assemblies 7014 are driven horizontally and positioned via servo motors and rack and pinion transmissions. They are all mounted on the frame 7011 via a slide rail guide mechanism. The initial vertical height difference between the support positions of the V-shaped pre-support frames on the two sets of outer cylinder support frame assemblies 7013 and the two sets of middle cylinder plunger support frame assemblies 7014 is fixed. Therefore, when adjusting the height of the center axis of the middle cylinder or plunger later, the vertical height of the adjusted outer cylinder center axis can be used as a reference. Therefore, the reference position of the pre-support blocks (reference blocks) at the top of the V-shaped pre-support frames must be regularly verified and adjusted.

[0091] like Figures 17 to 20 As shown, the press-fitting device includes a movable housing 70110, a press-fitting plate posture adjustment mechanism 7015 disposed at the top of the movable housing 70110, and a press-fitting sleeve height adjustment mechanism 7016 disposed at the front end of the movable housing 70110. A press-fitting sleeve 70111 is removably mounted (in this embodiment, slotted) on the side of the press-fitting sleeve height adjustment mechanism 7016 near the rear top support plate 7012. A horizontal telescopic mechanism 7017 is disposed within the movable housing 70110, with an axis position detection mechanism 7018 and an oil injection mechanism 7019 fixedly mounted at the telescopic ends thereof. The movable housing 70110 is driven horizontally and positioned horizontally by a servo motor and a rack-and-pinion transmission. Its horizontal movement provides the horizontal pushing force for the assembly of the cylinders. The press-fit plate posture adjustment mechanism 7015 adopts a two-stage drive mechanism consisting of a rodless cylinder and a cylinder. The rodless cylinder drives the press-fit plate 70112 to move horizontally to achieve position switching, and the cylinder drives the press-fit plate 70112 to flip to achieve horizontal and vertical posture switching. During the assembly stage of the middle cylinder and the outer cylinder, the press-fit plate 70112 is vertically located in front of the press-fit sleeve 70111. The front end of the press-fit sleeve 70111 is a flat plate with a large area, which acts on the port of the middle cylinder and evenly applies axial thrust. During the assembly stage of the piston and the outer cylinder and middle cylinder combination, the press-fit plate 70112 is re-located above the movable box 70110, and the press-fit sleeve 70111 can be sleeved on the outside of the connector at the top of the piston, so that the connector is placed in the press-fit sleeve 70111, so that the port of the press-fit sleeve 70111 can be against the end face of the piston to evenly apply axial thrust to the end face of the piston. Furthermore, by replacing different press-fit sleeves 70111, it can accommodate piston connectors of varying sizes. The press-fit sleeve height adjustment mechanism 7016, driven by a servo motor and a ball screw nut pair, raises and lowers the press-fit sleeve 70111, thereby adjusting the central axis of the press-fit sleeve 11 to align with the already adjusted central axis of the outer / intermediate cylinder.

[0092] In this embodiment, the hydraulic cylinder automatic assembly machine B801 and the hydraulic cylinder automatic assembly machine A701 adopt the same structure to make the equipment versatile. Obviously, different automatic assembly machines can also be used in the two processing areas, that is, the moving box body of the two assembly machines does not need to be provided with the press-fit plate posture adjusting mechanism 7015, and the front end side of the moving box body 70110 of the hydraulic cylinder automatic assembly machine A701 only needs to be vertically fixedly provided with the aforementioned press-fit plate 70112, and does not need to be provided with the press-fit sleeve height adjusting mechanism 7016 and the press-fit sleeve 70111.

[0093] The horizontal telescopic mechanism 7017 adopts a cascade telescopic rod mechanism driven by a servo motor and a ball screw nut pair transmission, and through elongation, the shaft center position detection mechanism 7018 and the oil injection mechanism 7019 on it are synchronously moved horizontally from the inside of the moving box body 70110 to the outside of the moving box body 70110, so that after the moving box body 70110 is horizontally moved, it can be inserted into the cavity inside the outer cylinder or the middle cylinder, the vertical height detection of two axial different position points in the cylinder cavity is realized through the shaft center position detection mechanism 7018, and the uniform spraying of oil mist on the inner wall of the cylinder cavity is realized through the oil injection mechanism 7019.

[0094] During specific assembly, the two sets of outer cylinder support frame assemblies 7013 are automatically adjusted to the joint positions of the outer cylinder, and the sixth gantry robot 702 places the cleaned outer cylinder to be assembled onto the two sets of outer cylinder support frame assemblies 7013. Before loading, manual operation is needed to select the workpiece model on site, and after confirmation, the two sets of outer cylinder support frame assemblies 7013 automatically horizontally move to adjust their respective horizontal positions and the distance therebetween according to the pre-set joint distance and position of the outer cylinder of the corresponding model, and then the automatic loading process is performed, and after the automatic loading is completed, manual confirmation is performed. The two sets of middle cylinder piston rod support frame assemblies 7014 are operated to the maximum position close to the rear top support plate 7012, and then the moving box body 70110 is horizontally moved to the side where the outer cylinder is located, and at the same time, the horizontal telescopic mechanism 7017 works to make the shaft center position detection mechanism 7018 and the oil injection mechanism 7019 extend to the outside of the moving box body 70110. The moving box body 70110 is horizontally moved to make the shaft center position detection mechanism 7018 reach the pre-set first detection point position and the second detection point position in the outer cylinder cavity, respectively. The laser sensor of the shaft center position detection mechanism 7018 detects the height difference of the shaft center line of the outer cylinder at the two detection point positions, and adjusts the vertical height of the V-shaped support frame of the two sets of outer cylinder support frame assemblies 7013 through feedback control to make the center axis of the outer cylinder adjusted to a horizontal state. Then, the two sets of outer cylinder support frame assemblies 7013 are horizontally moved to automatically move the outer cylinder to the rear end thereof to contact the working surface of the rear top support plate 7012. After the position detection sensor hidden in the rear top support plate 7012 detects that the outer cylinder is in place, the two sets of outer cylinder support frame assemblies 7013 are controlled to stop moving, and the axial positioning of the outer cylinder is completed.

[0095] After the center axis of the outer cylinder is adjusted to be horizontal, the pneumatic finger on the shaft position detection mechanism 7018 drives the protective cover to close, shielding the laser sensor from oil splashing. The moving box 70110 continues to move forward, causing the oil injection mechanism 7019 to reach the preset oil injection starting position in the outer cylinder cavity. The oil injection mechanism 7019 works, atomizing the oil through the atomizing nozzle and spraying it evenly on the inner wall of the outer cylinder. At the same time, the moving box 70110 moves in the opposite direction, and the atomizing nozzle moves horizontally to complete the oil injection operation in the outer cylinder cavity. When the atomizing nozzle reaches the cylinder port position of the outer cylinder, the oil injection mechanism 7019 stops working. Then the horizontal telescopic mechanism 7017 works in the opposite direction, driving the shaft position detection mechanism 7018 and the oil injection mechanism 7019 to reset to the moving box 70110. The moving box 70110 retreats to the initial position. Then the operator selects the corresponding type of middle cylinder guide sleeve from the loading rack and installs it into the assembled cylinder port of the outer cylinder.

[0096] Before the cleaned middle cylinder is assembled with the outer cylinder, the sixth gantry robot 702 picks up the middle cylinder and transfers it to the first manual assembly rack 703. The assembly personnel manually assemble the components such as the half ring, dust cover, and snap spring on the middle cylinder at this location. At the same time or thereafter, the press-fit plate posture adjustment mechanism 7015 works. The rodless cylinder drives the cylinder and the press-fit plate 70112 to move horizontally to the front end, so that the press-fit plate 70112 is located above the front end of the press-fit sleeve 70111. Then the output rod of the cylinder extends, causing the press-fit plate 70112 to flip from the horizontal state to the vertical state and be located in front of the front end of the press-fit sleeve 70111. The assembly machine with the fixed press-fit plate 70112 does not need this adjustment process.

[0097] After that, the two sets of middle cylinder piston rod support frame assemblies 7014 automatically adjust to the joint positions of the middle cylinder, and the sixth gantry robot 702 places the middle cylinder to be assembled on the two sets of middle cylinder piston rod support frame assemblies 7014. Similarly, before loading, manual operation is required to select the workpiece type on site. After confirmation, the two sets of middle cylinder piston rod support frame assemblies 7014 automatically move horizontally to adjust their respective horizontal positions and the distance between them according to the preset joint distance and position of the corresponding type of outer cylinder. Then the automatic loading process is performed, and the automatic loading is completed by manual confirmation.

[0098] Then, the pressing device moves horizontally, pushes the rear end of the middle cylinder to move horizontally and enters the outer cylinder through the middle cylinder guide sleeve. Specifically, the moving box 70110 moves horizontally forward, pushes the rear end of the middle cylinder to move horizontally and enters the outer cylinder through the vertical pressing plate 70112, and at the same time, the two sets of middle cylinder piston rod support frame assemblies 7014 also move horizontally forward synchronously, until the middle cylinder piston rod support frame assembly 7014 reaches the position near the outer cylinder port, the waist-shaped support roller descends vertically, so that the middle cylinder piston rod support frame assembly 7014 enters below the outer cylinder port end, and the pressing plate 70112 moves to the outside of the outer cylinder port, and the middle cylinder is completely pressed into the outer cylinder.

[0099] Then, the moving box 70110 moves reversely to reset, and the assembly of the half ring, dust cover, snap spring and other components on the middle cylinder guide sleeve in the outer cylinder port is completed manually, and the assembly between the middle cylinder and the outer cylinder is completed. During this process, the output rod of the cylinder is retracted, so that the pressing plate 70112 is turned from the vertical state to the horizontal state above the pressing sleeve 70111, and then the rodless cylinder drives the pressing plate 70112 to move horizontally to the last end, so that the pressing plate 70112 is located above the moving box 70110 again. Similarly, the assembly machine with the fixed pressing plate 70112 does not need this adjustment process.

[0100] After the assembly of the middle cylinder and the outer cylinder is completed, the sixth gantry manipulator 702 grabs the outer cylinder and the middle cylinder combination and places it on the corresponding outer cylinder feeding rack 1001 in the unloading buffer area of the outer cylinder cleaning machine 601, and then is transferred by the AGV trolley to the outer cylinder and middle cylinder combination feeding buffer area (separated from the unloading buffer area of the piston rod cleaning machine 603 and located on both sides of the hydraulic vertical column automatic assembly machine B801) in the assembly B area 8, and then the seventh gantry manipulator 802 grabs the outer cylinder and the middle cylinder combination and transfers it to the two sets of outer cylinder support frame assemblies 7013 of the hydraulic vertical column automatic assembly machine B801, and completes the horizontal adjustment and positioning of the center axis of the outer cylinder and the middle cylinder combination in the same positioning manner as the outer cylinder on the hydraulic vertical column automatic assembly machine A701. Then, the pressing device on the hydraulic vertical column automatic assembly machine B801 drives the oil injection mechanism 7019 to move horizontally, and the oil injection mechanism 7019 atomizes and uniformly sprays oil on the inner wall of the middle cylinder during the movement. Then, the pressing device resets, the operator selects the corresponding type of piston rod guide sleeve from the feeding rack, and installs it into the assembly port of the middle cylinder

[0101] The cleaned piston is picked up by the seventh gantry robot 802 and transferred to the connector assembly machine 804, the chuck of the connector assembly machine 804 clamps the sealing end of the piston, the other end of the connector assembly machine 804 clamps the connector (screw type) to be assembled, the chuck drives the piston to rotate, and the connector is screwed to the end face of the piston; then, the seventh gantry robot 802 transfers the piston to the second manual assembly rack 803, and the assembly personnel manually assemble the half ring, dust cover, snap spring and other components on the piston at this place.

[0102] The two sets of middle cylinder piston support assembly components 7014 on the hydraulic piston automatic assembly machine B801 are automatically adjusted to the joint position of the piston, and the seventh gantry robot 802 loads the piston to be assembled onto the two sets of middle cylinder piston support assembly components 7014. This process is the same as the previous loading process of the middle cylinder. The two sets of middle cylinder piston support assembly components 7014 automatically adjust their support height to make the center axis of the piston coincide with the center axis of the middle cylinder. This process is also the same as the previous vertical height adjustment process of the middle cylinder. Then, the press fitting device moves horizontally, pushes the rear end of the piston to move horizontally and fits into the middle cylinder through the piston guide sleeve. Because the press fitting plate posture adjusting mechanism 7015 has adjusted the press fitting plate 70112 above the displacement moving box 70110 during the previous press fitting device reset process, the press fitting sleeve 70111 is exposed on the front side of the moving box 70110 at this time. The press fitting sleeve height adjusting mechanism 6 works to drive the press fitting sleeve 70111 to move vertically, so that its center axis coincides with the previously set assembly center axis, so that the connector at the top end of the piston can smoothly enter the press fitting sleeve 11. The moving box 70110 moves horizontally forward, so that the press fitting sleeve 70111 is fitted outside the connector at the top end of the piston, the port of the press fitting sleeve 70111 abuts against the end face of the piston, and the top end of the piston is pushed to move horizontally and fit into the middle cylinder. At the same time, the two sets of middle cylinder piston support assembly components 7014 also move horizontally forward synchronously until the middle cylinder piston support assembly components 7014 enter below the end part of the middle cylinder port, and the press fitting sleeve 70111 moves to the outside of the middle cylinder port, and the piston is completely pressed into the middle cylinder. After the press fitting device moves away from the position of the outer cylinder port, the assembly of the half ring, dust cover, snap spring and other components on the piston guide sleeve in the middle cylinder port is completed manually, the assembly of the piston and the middle cylinder is completed, and the overall assembly of the hydraulic piston is completed.

[0103] After the assembly is completed, the seventh gantry robot 802 picks up the assembled body from the hydraulic piston automatic assembly machine B801 and transfers it to the special loading rack of the original outer cylinder and middle cylinder combination, and then transfers it to the assembly finished product storage area 600 by AGV trolley, and feeds back the material information to the warehouse management system, completes the remanufacturing process of repair and assembly.

[0104] Any technical features in the above-described embodiments can be combined in any manner, and for brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure.

[0105] The above-described embodiments are merely examples of the present application and do not limit the patent scope of the present application, and equivalent structures or equivalent processes transformed by using the contents of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A hydraulic column remanufacturing production line, characterized by: It includes a cylinder repair production line and a hydraulic parts assembly production line arranged on both sides of the main channel. The cylinder repair production line includes a process joint welding area, a raw material storage area, a repair line raw material storage area, an outer cylindrical surface repair area, an inner cylindrical surface repair area, a honing buffer area, a deep hole honing area, and a process joint cutting area, which are arranged in sequence. They are used for welding the process joints at the non-cylinder end of the outer cylinder, surface repair and finishing of the outer cylindrical surface of the middle cylinder and the piston, surface repair and finishing of the inner cylindrical surface of the outer cylinder and the middle cylinder, and cutting of the process joints at the non-cylinder end of the outer cylinder; The hydraulic parts assembly line includes an assembly line raw material storage area, an assembly line material storage area, a cylinder cleaning area, an assembly area A, an assembly area B, and an assembly finished product storage area, which are arranged in sequence. These areas are used for pre-assembly cleaning of each cylinder, automatic assembly between the outer cylinder and the middle cylinder, and further automatic assembly of the piston. The workpiece is transferred between workstations in each processing area by a truss robot, and the workpiece is transferred between different processing areas by an AGV car. The process joint welding area includes a first positioning tool, a welding lathe, a welding robot, a first truss manipulator, and a joint automatic loading tool; The AGV transports the outer cylinder from the raw material storage area to one side of the first positioning fixture. The first truss manipulator transfers the outer cylinder to the first positioning fixture to complete the positioning of the outer cylinder. The first truss manipulator transfers the positioned outer cylinder to the welding lathe. The chuck of the welding lathe clamps the cylinder end of the outer cylinder. The automatic joint loading fixture automatically positions the process joint to be welded at the non-cylinder end of the outer cylinder. The welding robot welds the process joint to the outer cylinder. The outer cylindrical surface repair area includes a second truss manipulator, a second positioning tool, at least one outer cylindrical rough turning machine tool, at least one outer cylindrical cladding machine tool, at least one outer cylindrical finishing machine tool and at least one outer cylindrical polishing machine tool; The inner surface repair area includes a third truss manipulator, a third positioning tool, at least one cylinder mouth rough turning machine, at least one deep hole rough boring machine, at least one inner circle cladding machine, at least one cylinder mouth fine turning machine and at least one deep hole fine boring machine.

2. The hydraulic column remanufacturing production line according to claim 1 is characterized in that: The deep hole honing area includes a fourth truss manipulator, a fourth positioning tool and at least one deep hole honing machine tool.

3. The hydraulic column remanufacturing production line according to claim 1 or 2, characterized in that: The raw material storage area includes a special material rack for outer cylinder upper parts, a special material rack for middle cylinder upper parts and a special material rack for piston upper parts, which are respectively used to place the outer cylinder, middle cylinder and piston to be processed. At least one group of V-shaped support seats is provided on the top surface of each special material rack for upper parts.

4. A hydraulic column remanufacturing production method, applied to the hydraulic column remanufacturing production line according to any one of claims 1 to 3, characterized in that: It is divided into the cylinder parts repair stage and the cylinder parts assembly stage after repair; The cylinder block component repair phase includes the following steps: Automatically complete the preparation of the reference support outer cylindrical surface of the outer surface of the middle part of the cylinder body by welding the process joint at the process joint welding area; Automatically complete the outer surface repair of the cylinder and plunger in the outer surface repair area; In the inner surface repair area, the inner surface repair of the outer cylinder and the inner surface of the middle cylinder are automatically completed; In the deep hole honing area, the inner surface finishing of the outer cylinder / middle cylinder and the cutting of the welding process joint at the non-cylinder end of the outer cylinder are automatically completed; The post-repair cylinder block assembly phase includes the following steps: In the corresponding cylinder cleaning area, the surface cleaning of the outer cylinder, the middle cylinder and the piston is automatically completed; In the assembly area A, the middle cylinder and the outer cylinder are automatically assembled to form an outer cylinder and middle cylinder combination; The assembly between the piston and the outer cylinder and inner cylinder assembly is automatically completed in the assembly area B.

5. The hydraulic column remanufacturing production method according to claim 4, characterized in that: The specific process of automatic assembly between the outer cylinder and the middle cylinder is as follows: The cleaned outer cylinder is loaded onto the hydraulic column automatic assembly machine A, which automatically adjusts the center axis of the outer cylinder to a horizontal state and completes the axial positioning of the outer cylinder; The corresponding accessories are manually assembled on the cleaned middle cylinder, and then loaded onto the hydraulic column automatic assembly machine A. The hydraulic column automatic assembly machine A automatically adjusts the central axis of the middle cylinder to coincide with the central axis of the outer cylinder; The pressing device on the hydraulic column automatic assembly machine A moves horizontally, pushing the middle cylinder to move horizontally and install it into the outer cylinder.

6. The hydraulic column remanufacturing production method according to claim 5, characterized in that: The specific process of automatic assembly between the piston and the outer cylinder and inner cylinder assembly is as follows: The outer cylinder and inner cylinder assembly is loaded onto the hydraulic column automatic assembly machine B, which automatically adjusts the center axis of the outer cylinder to a horizontal state and completes the axial positioning of the outer cylinder; The corresponding accessories are manually assembled on the cleaned plunger, and then loaded onto the hydraulic column automatic assembly machine B. The hydraulic column automatic assembly machine B automatically adjusts the central axis of the plunger to coincide with the central axis of the outer cylinder; The pressing device on the hydraulic column automatic assembly machine B moves horizontally, pushing the piston to move horizontally and install it into the outer cylinder.

7. The hydraulic column remanufacturing production method according to claim 6, characterized in that: After the central axis of the outer cylinder / outer cylinder and inner cylinder combination is adjusted to a horizontal state, oil is evenly sprayed on the inner wall of the outer cylinder / inner cylinder cavity.

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