Horizontal combined machining center suitable for large workpieces

Abstract

The invention discloses a horizontal type combined machining center suitable for large workpieces, and relates to the technical field of combined machining machine tools, the horizontal type combined machining center comprises a machine tool, a workbench is arranged on the machine tool, a visual inspection mechanism is arranged on one side of the machine tool, a first locking assembly is arranged on the workbench, and the first locking assembly comprises a supporting seat and a locking chain; the locking chain comprises a plurality of outer chain plates, inner chain plates and chain shafts, a lubricating assembly is arranged on the locking chain and comprises a lubricating box, a sealing plate is fixed to the other side of the lubricating box, a plurality of first springs are connected to the circumference of the inner side of the sealing plate, and the other ends of the first springs are connected with sealing blocks. A force detection module is arranged at the connecting end of the first spring and the sealing plate, one side of the lubricating box is connected with a display box, the display box is made of transparent materials, and an oil liquid opening is formed in one end of the display box. Point-to-point precise lubrication of chain nodes is achieved, and insufficient lubrication or excessive lubrication is avoided.

Description

Technical Field

[0001] This invention relates to the field of composite machining technology, specifically a horizontal composite machining center suitable for large workpieces. Background Technology

[0002] A horizontal machining center is a CNC machine tool with a horizontally arranged spindle. It is typically equipped with a rotary table and a multi-functional turret or automatic tool changer, enabling multiple machining operations such as milling, drilling, and tapping to be completed in a single setup. This significantly improves machining efficiency and accuracy, making it particularly suitable for multi-faceted machining of large and complex workpieces. In the machining of large workpieces (such as large metal rods), reliable workpiece clamping is crucial for ensuring machining accuracy. Common clamping methods include chuck fixing and chain locking, with chain locking being widely used due to its adaptability and lower cost.

[0003] However, under prolonged and high-load locking conditions, uneven bending and friction can easily occur between chain links. This is especially true when the chain is in contact with the curved surface of a workpiece, where the stress and fretting wear on some links are significantly amplified. Improper lubrication can easily lead to accelerated wear between the chain shaft and the chain plate holes, reducing chain lifespan and even causing locking failure, thus affecting machining safety and precision. Traditional lubrication methods, often involving periodic manual or centralized oil supply, are insufficient for precise lubrication of highly worn chain links, easily resulting in under- or over-lubrication. This approach fails to meet the high demands for equipment stability and intelligent maintenance in complex machining processes.

[0004] Therefore, how to achieve real-time status monitoring and precise lubrication of the locking chain during composite machining has become an important technical issue for improving the safety, accuracy and equipment reliability of large workpiece machining. Summary of the Invention

[0005] The purpose of this invention is to provide a horizontal composite machining center suitable for large workpieces, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a horizontal composite machining center suitable for large workpieces, including a machine tool, a worktable on the machine tool, a vision inspection mechanism on one side of the machine tool, a locking assembly one and a locking assembly two on the worktable for locking the workpiece as required, the locking assembly one including a support base and a locking chain, the locking chain including several outer chain plates, inner chain plates and a chain shaft, the outer chain plates and inner chain plates being alternately connected at both ends of the chain shaft to form a complete chain, the outer chain plates being located outside the inner chain plates, a lubrication assembly on the locking chain, the lubrication assembly including a lubrication box, the lubrication box being fixed on the outer chain plate and covering the end of the chain shaft extending out of the outer chain plate, a sealing plate being fixed on the other side of the lubrication box, several springs one being connected to the inner circumference of the sealing plate, the other end of the springs one being connected to a sealing block, a force detection module being provided at the connection end of the springs one and the sealing plate, a display box being connected to one side of the lubrication box, the display box being made of transparent material, and an oil port being provided at one end of the display box.

[0007] According to the above technical solution, the sealing block is attached to and slides against the inner wall of the lubrication box, the display box is set as a semi-circular ring structure with an outer diameter larger than the diameter of the lubrication box, and the height of the display box is less than the thickness of the sealing block.

[0008] According to the above technical solution, the sealing block is provided with a round hole at the end of the chain shaft, and a partition is fixed inside the display box. The partition is located near the oil port and divides the space inside the display box into an oil inlet / outlet area and an oil level display area. The oil inlet / outlet area serves as a transfer area for the entry and exit of oil, and the oil level display area is used to display the amount of oil in the lubrication box.

[0009] According to the above technical solution, a central hole is provided in the middle of the partition plate, and several fan-shaped grooves are provided around the circumference of the central hole. A sliding rod is slidably connected to the central hole. A valve block is fixed at one end of the sliding rod facing the oil port, and a second spring is sleeved on the other end of the sliding rod. The other end of the second spring is connected to the partition plate.

[0010] According to the above technical solution, an oil pipe is connected to the oil port, and the main body of the oil pipe covers the chain shaft. A filter, an oil tank and an oil pump are respectively installed on the oil pipe.

[0011] According to the above technical solution, the sealing plate is provided with connection holes, and two opposite outer chain plates are grouped together. The corresponding connection holes are connected to air passage branches, each air passage branch is provided with an air valve, and each air valve is connected to an air pump.

[0012] According to the above technical solution, a fixed lock is provided at one end of the locking chain, which is fixed to the workbench, and a movable lock is provided at the other end of the locking chain. The movable lock is used to fix or loosen the workbench, and several locking holes are provided on the workbench.

[0013] According to the above technical solution, the locking component 2 includes three sets of eccentric screws and eccentric pressure blocks. The eccentric screws and eccentric pressure blocks form an eccentric lock. Through the principle of eccentricity, during the process of locking the eccentric screws, the eccentric pressure blocks will be pushed in another direction. Then, the three eccentric pressure blocks form a triangle, fixing the workpiece within a certain range.

[0014] According to the above technical solution, a transverse moving mechanism is provided on the lower side of the worktable to adjust the position of the worktable on the machine tool. The worktable adopts a rotatable platform.

[0015] According to the above technical solution, the visual inspection mechanism includes a longitudinal drive module, a turntable is installed at the drive end of the drive module, a fixed shaft is connected to the turntable, a mounting bracket is connected to the fixed shaft, a camera is installed on one side of the mounting bracket, and a lighting bracket is installed on the other side of the mounting bracket.

[0016] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: By incorporating a lubrication component and combining visual detection of bending status with force detection of sealing status, this invention can accurately determine which specific chain link requires lubrication at what time, achieving precise "point-to-point" lubrication. This avoids insufficient or excessive lubrication. When locking the curved surface of the metal rod, it can automatically identify high-risk chain links with increased friction due to uneven bending and fretting wear, and prioritize lubrication of these links, ensuring that the chain's flexibility and locking force are always maintained at an optimal state. Furthermore, by incorporating a drivable sealing block, the suction and thrust generated by the block's movement can help oil enter the lubrication tank and, to some extent, help oil penetrate the chain shaft end, enhancing the lubrication effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the composite machining center of the present invention; Figure 2 This is a schematic diagram of the lubrication assembly of the present invention; Figure 3 This is a longitudinal sectional view of the lubrication box of the present invention; Figure 4 This is a cross-sectional view of the lubrication box of the present invention; Figure 5 This is a schematic diagram of the oil inlet state of the lubrication box of the present invention; Figure 6 This is a schematic diagram of the oil draining state of the lubrication tank of the present invention; Figure 7 This is the present invention. Figure 6 Enlarged diagram of area A; Figure 8This is an exploded view of the partition connection structure of the present invention; Figure 9 This is a schematic diagram of the structure of locking component one and locking component two of the present invention; Figure 10 This is a schematic diagram of the second locking component of the present invention; Figure 11 This is a schematic diagram of the structure of the visual inspection mechanism of the present invention; Figure 12 This is a schematic diagram of the driving structure of the sealing block of the present invention; Figure 13 This is a side view of the workbench of the present invention; Figure 14 This is a partial structural schematic diagram of the composite machining center of the present invention.

[0018] In the diagram: 1. Machine tool; 2. Worktable; 21. Locking hole; 22. Tool setting block; 3. Vision inspection mechanism; 31. Drive module; 32. Turntable; 321. Fixed axis; 33. Mounting bracket; 34. Camera; 35. Lighting fixture; 36. Display and control panel; 4. Locking assembly one; 41. Support base; 42. Locking chain; 421. Outer chain plate; 422. Inner chain plate; 423. Chain shaft; 424. Fixed lock; 425. Movable lock; 5. Locking assembly two; 51. Eccentric screw; 52. Eccentric pressure block; 6. Workpiece; 7. Lubrication box; 71. Sealing Plate; 711, Connecting hole; 72, Spring 1; 73, Sealing block; 731, Round hole; 74, Display box; 741, Oil port; 742, Partition plate; 7421, Center hole; 7422, Sector groove; 743, Oil inlet / outlet area; 744, Oil level display area; 745, Slide rod; 746, Valve block; 747, Spring 2; 75, Oil pipe; 751, Filter; 752, Oil tank; 753, Oil pump; 761, Air branch pipe; 762, Air valve; 763, Air pump; 8, First spindle; 81, Second spindle; 9, Protective housing; 91, Electrical control cabinet. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-14The present invention provides a technical solution: a horizontal composite machining center suitable for large workpieces, including a machine tool 1, a worktable 2 on the machine tool 1, a vision inspection mechanism 3 on one side of the machine tool 1, and a locking assembly 4 and a locking assembly 5 on the worktable 2 for locking workpieces 6 as required. The locking assembly 4 includes a support base 41 and a locking chain 42. The locking chain 42 includes several outer chain plates 421, inner chain plates 422, and a chain shaft 423. The outer chain plates 421 and inner chain plates 422 are alternately connected to both ends of the chain shaft 423 to form a complete chain. 1. A lubrication assembly is provided on the locking chain 42 located outside the inner chain plate 422. The lubrication assembly includes a lubrication box 7, which is fixed on the outer chain plate 421 and covers the end of the chain shaft 423 that extends out of the outer chain plate 421. A sealing plate 71 is fixed on the other side of the lubrication box 7. Several springs 72 are connected to the inner circumference of the sealing plate 71. A sealing block 73 is connected to the other end of the springs 72. A force detection module is provided at the connection end between the springs 72 and the sealing plate 71. A display box 74 is connected to one side of the lubrication box 7. The display box 74 is made of transparent material and has an oil port 741 at one end.

[0021] The following is a supplementary explanation based on the above structure: The sealing block 73 is attached to and slides against the inner wall of the lubrication box 7. The display box 74 is a semi-circular ring structure with an outer diameter larger than the diameter of the lubrication box 7, and its height is less than the thickness of the sealing block 73. Initially, the sealing block 73 is pressed against the surface of the outer chain plate 421 by the action of spring 72, and the side of the sealing block 73 corresponds to the display box 74. At this time, the display box 74 is blocked from communicating with the lubrication box 7 by the sealing block 73. When spring 72 contracts, it pulls the sealing block 73 away from the surface of the outer chain plate 421, and the sealing block 73 and the display box 74 are misaligned. At this time, the display box 74 communicates with the lubrication box 7. The force detection module uses, but is not limited to, strain gauges to determine the extension and contraction state of spring 72 based on the detected force signal, thereby determining the position of the sealing block 73 within the lubrication box 7. The vision inspection mechanism 3 is used to detect the bending state of the outer chain plate 421 and inner chain plate 422 during the locking process of the locking chain 42 on the workpiece 6, and to determine whether lubrication is required.

[0022] Furthermore, such as Figure 3 , Figure 4 As shown, the sealing block 73 has a round hole 731 at the end of the chain shaft 423. A partition 742 is fixed inside the display box 74. The partition 742 is located near the oil port 741. The partition 742 divides the space inside the display box 74 into an oil inlet / outlet area 743 and an oil level display area 744. The oil inlet / outlet area 743 serves as a transfer area for the entry and exit of oil, and the oil level display area 744 is used to display the amount of oil in the lubrication box 7.

[0023] In one embodiment, such as Figure 8As shown, a central hole 7421 is provided in the middle of the partition 742. Several fan-shaped grooves 7422 are provided around the central hole 7421. A slide rod 745 is slidably connected to the central hole 7421. A valve block 746 is fixed at one end of the slide rod 745 facing the oil port 741. A spring 747 is sleeved on the other end of the slide rod 745. The other end of the spring 747 is connected to the partition 742.

[0024] It should be added that: such as Figures 5-7 As shown, the area of ​​valve block 746 can completely cover the sector groove 7422. When oil is entering, valve block 746, under the force of spring 747 and the oil thrust from the outside in, adheres to partition 742. At this time, sector groove 7422 is closed, and the oil path is from oil inlet / outlet area 743 to the inside of lubrication tank 7. When oil is exiting, valve block 746, under the oil thrust from the inside out, overcomes the force of spring 747, causing slide rod 745 to move and compress spring 747. At this time, valve block 746 disengages from the surface of partition 742, sector groove 7422 opens, connecting oil inlet / outlet area 743 and oil level display area 744. The oil path is from inside lubrication tank 7, oil level display area 744 to oil inlet / outlet area 743.

[0025] like Figure 2 As shown, an oil pipe 75 is connected to the oil port 741. The main body of the oil pipe 75 covers the chain shaft 423. A filter 751, an oil tank 752, and an oil pump 753 are respectively installed on the oil pipe 75.

[0026] In actual operation, the main body of the oil pipe 75 covers the entire chain. The oil pump 753 draws lubricating oil from the oil tank 752. The lubricating oil passes through the main body of the oil pipe 75, is filtered by the filter 751, and then returns to the oil tank 752, forming a circulation. During this period, if the sealing block 73 remains in contact with the surface of the outer chain plate 421, oil cannot enter the corresponding lubrication box 7; if the sealing block 73 detaches from the surface of the outer chain plate 421, oil enters the corresponding lubrication box 7.

[0027] The sealing plate 71 has a connection hole 711. Two opposite outer chain plates 421 are grouped together. The corresponding connection hole 711 is connected to an air passage branch pipe 761. Each air passage branch pipe 761 is equipped with an air valve 762. Each air valve 762 is connected to an air pump 763.

[0028] In practice, such as Figure 12As shown, the air pump 763 is used to draw or input airflow into each air passage branch pipe 761, and the air valve 762 determines the opening and closing state of each air passage branch pipe 761. When the air pump 763 draws airflow into some air passage branch pipes 761, a negative pressure is generated in the corresponding lubrication box 7. At this time, the spring 72 is compressed, pulling the sealing block 73 away from the surface of the outer chain plate 421, and at the same time, the oil in the oil pipe 75 enters the lubrication box 7, and the oil lubricates the end of the corresponding chain shaft 423. When the air pump 763 inputs airflow, the sealing block 73 is pushed back to its original position by the gas, and the oil in the lubrication box 7 is pushed back into the oil pipe 75. At the same time, the thrust of the sealing block 73 can help the oil penetrate the end of the chain shaft 423 to a certain extent, enhancing the lubrication effect.

[0029] like Figure 9 As shown, a fixed lock 424 is provided at one end of the locking chain 42, which is fixed to the workbench 2. A movable lock 425 is provided at the other end of the locking chain 42. The movable lock 425 is used to fix or loosen the workbench 2. Several locking holes 21 are provided on the workbench 2.

[0030] In actual operation, the fixed lock 424 and the movable lock 425 are not unique. The fixed lock 424 can be fixed by bolts and corresponding locking holes 21. The fixed position is preferably located in the middle of the workbench 2. The movable lock 425 can be locked by using pliers to lock the end of the locking chain 42 to the corresponding locking hole 21.

[0031] like Figure 10 As shown, the locking assembly 2 5 includes three sets of eccentric screws 51 and eccentric pressure blocks 52. The eccentric screws 51 and eccentric pressure blocks 52 form an eccentric lock. Through the principle of eccentricity, during the process of locking the eccentric screws 51, the eccentric pressure blocks 52 will be pushed in another direction. Then, the three eccentric pressure blocks 52 form a triangle, fixing the workpiece 6 within a certain range.

[0032] It should be further explained that: Locking component 4 is used for locking the metal rod workpiece 6 when it is placed horizontally. This involves placing the curved surface of workpiece 6 on the support base 41, then wrapping the locking chain 42 around the surface of workpiece 6 for fixation. Locking component 5 is used for locking the metal rod workpiece 6 when it is placed vertically. This involves placing the flat surface of workpiece 6 directly on the worktable 2 and locking it using the eccentric screw 51 and the eccentric pressure block 52. The locking method can be selected according to the length specifications of workpiece 6 or processing requirements.

[0033] Optionally, a transverse moving mechanism is provided on the lower side of the worktable 2 to adjust the position of the worktable 2 on the machine tool 1. The worktable 2 is a rotatable platform.

[0034] like Figure 11As shown, the visual inspection mechanism 3 includes a longitudinal drive module 31. A turntable 32 is installed at the drive end of the drive module 31. A fixed shaft 321 is connected to the turntable 32. A mounting bracket 33 is connected to the fixed shaft 321. A camera 34 is installed on one side of the mounting bracket 33, and a lighting bracket 35 is installed on the other side of the mounting bracket 33.

[0035] In actual operation, the longitudinal drive module 31 employs, but is not limited to, a lead screw motor and drive structure to control the longitudinal position of the turntable 32. The turntable 32 is connected to a rotary motor to control its rotation, thereby adjusting the position of the fixed shaft 321. Preferably, a micro-driver is connected to one side of the lighting fixture 35 to adjust the lighting angle of the lighting fixture 35, and a display control screen 36 is provided on one side of the turntable 32 to display the captured images from the camera 34 and control the operation of the vision inspection mechanism 3 and the lubrication components.

[0036] In one embodiment, a tool setting block 22 is provided on one side of the worktable 2. The tool setting block 22 is used to fix the relative drop value between the tool setting point and the rotation center of the worktable 2. The machine tool system automatically calculates the rotation coordinate deviation value through macro calculation to achieve the coordinate machining of multi-angle surfaces.

[0037] like Figure 1 As shown, a first spindle 8 is installed on the other side of the machine tool 1 for machining the workpiece 6 in the x-axis direction. A second spindle 81 is provided on the remaining side of the machine tool 1 for machining the workpiece 6 in the y-axis direction. The first spindle 8 and the second spindle 81 are used to install corresponding tools according to the machining type. A protective housing 9 is provided on the outer side of the machine tool 1, and an electrical control cabinet 91 is provided on the surface of the protective housing 9.

[0038] The specific implementation method is as follows: When the locking chain 42 wraps around the arc-shaped surface of the metal rod workpiece 6 and tightens it, its stress state is fundamentally different from that of locking a planar object, and the lubrication requirement mainly stems from the following intensified friction state.

[0039] Uneven bending of the chain leads to localized high stress. To conform to a cylindrical surface, each link requires a different bending angle. The links in direct contact with workpiece 6 (especially the middle section) experience the most severe bending, with the relative rotation and compression friction between the outer link plate 421 and the inner link plate 422 at the chain shaft 423 being significantly greater than in other areas. The visual inspection mechanism 3 compares the real-time bending angles of each link in the locked state. If it finds that the bending angle of one or more links (or the displacement difference between adjacent links) is significantly greater than the theoretically required bending angle for conforming to the arc, or exceeds the system's set safety threshold, it determines that abnormal dry friction or grease extrusion has occurred at that point, requiring immediate lubrication.

[0040] Fretting wear between the chain shaft 423 and the chain plate hole intensifies. Under the locking force, the chain not only stretches but also experiences continuous radial pressure due to its contact with the curved surface. This causes high-frequency micro-oscillations (fretting wear) between the chain shaft 423 and the chain plate hole wall, accelerating lubricant consumption and failure. When the vision inspection mechanism 3 detects continuous, unexpected micro-amplitude high-frequency vibration (distinct from normal elastic deformation) in a chain link under locking conditions through high frame rate image analysis, or when the force detection module reports abnormal high-frequency fluctuations in the force signal of spring 72 at that location (indicating abnormal frictional vibration of the sealing block 73), it is determined that fretting wear at that location has intensified and additional lubrication is needed to form a new anti-wear oil film.

[0041] The obstruction of seal 73's reset indicates that the old grease has hardened or become contaminated. After prolonged locking or high-temperature processing, grease that has seeped into the end of chain shaft 423 may have hardened, carbonized, or become contaminated with metal shavings. When the locking action is released (the chain should return to its free state), the force detection module detects that spring 72 of a certain chain link failed to push seal 73 back to its initial position, fully pressed against the outer chain plate 421 (force signal remains low). This indicates that foreign matter or hardened sludge is obstructing seal 73's reset, and also means that the lubricant inside this chain link has failed. A strong "oil-backflush" cycle needs to be triggered to flush and replace the failed lubricant with fresh lubricating oil.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A horizontal composite machining center suitable for large workpieces, comprising a machine tool (1), characterized in that, The machine tool (1) is provided with a worktable (2), and a vision inspection mechanism (3) is provided on one side of the machine tool (1). The worktable (2) is provided with a locking assembly one (4) and a locking assembly two (5) for locking the workpiece (6) as required. The locking assembly one (4) includes a support base (41) and a locking chain (42). The locking chain (42) includes several outer chain plates (421), inner chain plates (422), and a chain shaft (423). The outer chain plates (421) and the inner chain plates (422) are alternately connected to both ends of the chain shaft (423) to form a complete chain. The outer chain plates (421) are located outside the inner chain plates (422). The locking chain (421) is located outside the inner chain plates (422). The lubrication assembly is provided on the lubrication box (7), which is fixed on the outer chain plate (421) and covers the end of the chain shaft (423) that extends out of the outer chain plate (421). A sealing plate (71) is fixed on the other side of the lubrication box (7). Several springs (72) are connected to the inner circumference of the sealing plate (71). A sealing block (73) is connected to the other end of the springs (72). A force detection module is provided at the connection end between the springs (72) and the sealing plate (71). A display box (74) is connected to one side of the lubrication box (7). The display box (74) is made of transparent material. An oil port (741) is provided at one end of the display box (74).

2. The horizontal composite machining center suitable for large workpieces according to claim 1, characterized in that, The sealing block (73) is attached to and slides against the inner wall of the lubrication box (7). The display box (74) is set as a semi-circular ring structure and its outer diameter is larger than the diameter of the lubrication box (7). The height of the display box (74) is smaller than the thickness of the sealing block (73).

3. A horizontal composite machining center suitable for large workpieces according to claim 2, characterized in that, The sealing block (73) has a round hole (731) at the end of the chain shaft (423). A partition (742) is fixed inside the display box (74). The partition (742) is located near the oil port (741). The partition (742) divides the space inside the display box (74) into an oil inlet / outlet area (743) and an oil level display area (744). The oil inlet / outlet area (743) serves as a transfer area for the entry and exit of oil. The oil level display area (744) is used to display the amount of oil in the lubrication tank (7).

4. A horizontal composite machining center suitable for large workpieces according to claim 3, characterized in that, The partition (742) has a central hole (7421) in the middle. The partition (742) has several fan-shaped grooves (7422) around the central hole (7421). A slide rod (745) is slidably connected to the central hole (7421). A valve block (746) is fixed to one end of the slide rod (745) facing the oil port (741). A spring (747) is sleeved on the other end of the slide rod (745). The other end of the spring (747) is connected to the partition (742).

5. A horizontal composite machining center suitable for large workpieces according to claim 4, characterized in that, The oil port (741) is connected to an oil pipe (75), the main body of the oil pipe (75) covers the chain shaft (423), and a filter (751), an oil tank (752) and an oil pump (753) are respectively installed on the oil pipe (75).

6. A horizontal composite machining center suitable for large workpieces according to claim 5, characterized in that, The sealing plate (71) has a connection hole (711). Two opposite outer chain plates (421) are grouped together. The corresponding connection hole (711) is connected to an air passage branch pipe (761). Each air passage branch pipe (761) is equipped with an air valve (762). Each air valve (762) is connected to an air pump (763).

7. A horizontal composite machining center suitable for large workpieces according to claim 6, characterized in that, One end of the locking chain (42) is provided with a fixed lock (424), which is fixed on the workbench (2). The other end of the locking chain (42) is provided with a movable lock (425), which is used to fix or loosen the workbench (2). The workbench (2) is provided with several locking holes (21).

8. A horizontal composite machining center suitable for large workpieces according to claim 7, characterized in that, The second locking component (5) includes three sets of eccentric screws (51) and eccentric pressure blocks (52), and the eccentric screws (51) and the eccentric pressure blocks (52) form an eccentric lock.

9. A horizontal composite machining center suitable for large workpieces according to claim 8, characterized in that, The worktable (2) is provided with a transverse moving mechanism on its lower side for adjusting the position of the worktable (2) on the machine tool (1). The worktable (2) is a rotary platform.

10. A horizontal composite machining center suitable for large workpieces according to claim 9, characterized in that, The visual inspection mechanism (3) includes a longitudinal drive module (31), a turntable (32) is installed at the drive end of the drive module (31), a fixed shaft (321) is connected to the turntable (32), a mounting bracket (33) is connected to the fixed shaft (321), a camera (34) is installed on one side of the mounting bracket (33), and a lighting bracket (35) is installed on the other side of the mounting bracket (33).

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