Large door shaft end column plane processing system

Abstract

The utility model provides a kind of large door shaft end column plane processing system, including floor boring and milling machine;First permanent magnet steel ruler is equipped in the front end side of floor boring and milling machine guide rail;Second permanent magnet steel ruler is equipped in the rear end side of floor boring and milling machine guide rail;Third permanent magnet steel ruler is equipped in the extension line direction of first permanent magnet steel ruler and second permanent magnet steel ruler same scale connecting line, the position of one door shaft end column length distance from first permanent magnet steel ruler;Four roll body permanent magnet steel rulers are respectively placed in the two ends of the plane of the longer center roll body line length of door shaft end column, and the end face of four roll body permanent magnet steel rulers is coincided with center roll body line in the same direction;Laser transit, crane.The utility model breaks through the dependence of traditional technology to large high-precision machine tool, provides a kind of low cost, easily implemented large door shaft end column plane processing device, so that ordinary floor boring and milling machine reaches the machining precision of gantry milling machine, supports the on-site machining of super large workpiece, reduces the transportation cost of workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy engineering equipment manufacturing, and specifically relates to a processing system for the flat surface of a large door shaft end column. Background Technology

[0002] Triangular gates are large-scale equipment commonly used in modern water conservancy projects, with gate heights typically exceeding 20 meters. The height of the gate shaft end post is also greater than 20 meters, with a mounting surface at the top and bottom of the end post. The parallelism of these two mounting surfaces must be less than 1 mm, and the parallelism of these two mounting surfaces directly affects the smooth opening and closing of the triangular gate.

[0003] In existing technologies, the machining of the two large mounting surfaces corresponding to the gate shaft end column (length > 20m) of a large triangular gate requires high-precision large gantry milling machines, which presents the following problems:

[0004] 1. High equipment costs: The purchase cost of a large gantry milling machine exceeds two million yuan, which is usually difficult for small and medium-sized enterprises to afford;

[0005] 2. Site limitations: Machining the end column mounting surface using a large gantry milling machine requires a dedicated foundation and factory building, making on-site machining impossible. The workpiece must be transported between the installation site and the machining plant.

[0006] 3. Precision depends on a single component: It relies entirely on the precision of the guide rails of the large gantry milling machine itself and cannot compensate for errors caused by thermal deformation and gravity deformation. Utility Model Content

[0007] One objective of this invention is to provide a machining system for the flat surface of a large door hinge end column, in order to solve at least one of the aforementioned problems in the prior art.

[0008] According to one aspect of the present invention, a machining system for the flat surface of a large door hinge end column is provided, characterized in that it includes a floor-type boring and milling machine;

[0009] A first permanent magnet steel ruler is located on the front side of the guide rail of a floor-type boring and milling machine;

[0010] A second permanent magnet steel ruler is located on the rear side of the guide rail of a floor-type boring and milling machine;

[0011] A third permanent magnet ruler is located at a position one door hinge end post length away from the first permanent magnet ruler, along the extension line of the line connecting the same scale of the first and second permanent magnet rulers.

[0012] Four rolling permanent magnet steel rulers are respectively placed at both ends of the plane with the longer center rolling line on the end post of the door hinge, and one end face of each of the four rolling permanent magnet steel rulers coincides with the center rolling line in the same direction.

[0013] A laser theodolite is used to determine the same scale points of the first, second, and third permanent magnet steel rulers, as well as the same scale points of the four rolling permanent magnet steel rulers.

[0014] Crane, used for hoisting the end column of the portal frame.

[0015] This utility model's machining system for the large gate shaft end column plane breaks through the traditional process's reliance on large, high-precision machine tools, providing a low-cost, easy-to-implement machining device for the large gate shaft end column plane. Through modular tooling and datum reconstruction technology, it enables ordinary floor-type boring and milling machines to achieve the machining accuracy of gantry milling machines. It can achieve machining of gate shaft end column plane flatness ≤0.3mm / 25m and parallelism error ≤0.25mm on ordinary floor-type boring and milling machines. The equipment modification cost is only 20,000 yuan (only the cost of adding leveling tooling). It is especially suitable for the on-site precision machining of ultra-long span gate end columns in water conservancy projects, supporting the on-site machining of ultra-large gate shaft end column planes with spans of 20-40m and weights of over 30 tons, and also reducing the transportation cost of workpieces.

[0016] In some embodiments, the present invention further includes a first leveling fixture and a second leveling fixture respectively supported below the two ends of the door hinge end post; both the first leveling fixture and the second leveling fixture contain a four-degree-of-freedom fine adjustment mechanism.

[0017] In some embodiments, the first leveling fixture and the second leveling fixture of this utility model respectively include a base, a slide rail, a jack, a support plate, a safety device, and a slider; the slide rail is disposed on the upper surface of the base, the slider is adapted to the slide rail, and the slider is mounted on the slide rail; a jack is disposed at each of the four corners of the upper surface of the slider, and a safety device is disposed between the two jacks; the support plate is disposed above the jacks.

[0018] In some embodiments, the present invention also includes a support frame supporting the middle part of the door hinge end post.

[0019] In some embodiments, the surface roughness Ra of the guide rail side of the floor-type boring and milling machine of this invention is ≤1.6μm.

[0020] In some embodiments, the coplanar error of the first reference point, the second reference point, and the third reference point of this invention is ≤0.2mm.

[0021] In some embodiments, the parallelism deviation between the plane where the center roller line of the door shaft end column of this invention is located and the plane where the same scale point of the first permanent magnet steel ruler, the second permanent magnet steel ruler and the third permanent magnet steel ruler is located is ≤0.25mm. Attached Figure Description

[0022] Figure 1This is a schematic diagram showing the structure and positional relationship of components such as a floor-type boring and milling machine, a door shaft end column, and a laser theodolite in a machining system for a large door shaft end column plane according to one embodiment of this utility model.

[0023] Figure 2 This is a schematic diagram showing the structure and positional relationship of each component in a machining system for a large door shaft end column plane, used to determine the virtual track reference plane of a floor-mounted milling machine, according to one embodiment of this utility model.

[0024] Figure 3 This is a schematic diagram showing the structure and positional relationship of various components in a machining system for a large door hinge end column plane, which is an embodiment of the present invention, to determine the machining reference surface of the door hinge end column.

[0025] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0026] Figure 5 This is a schematic diagram of the leveling fixture in a machining system for the end plate of a large door hinge, according to one embodiment of this utility model.

[0027] Figure label:

[0028] 10-Door hinge end post, 11-First machined surface, 12-Second machined surface;

[0029] 20 - Floor-type boring and milling machine; 21 - Milling cutter head;

[0030] 30 - Laser theodolite; 31 - First permanent magnet steel ruler; 32 - Second permanent magnet steel ruler; 33 - Third permanent magnet steel ruler;

[0031] 41-First leveling fixture, 42-Support frame, 43-Second leveling fixture, 431-Base, 432-Jack, 433-Slide rail, 434-Plate, 435-Safety device, 436-Slider;

[0032] 51-First rolling permanent magnet steel ruler, 52-Second rolling permanent magnet steel ruler, 53-Third rolling permanent magnet steel ruler, 54-Fourth rolling permanent magnet steel ruler. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0035] Finally, it should be noted that in this document, relational terms such as first and second, counterclockwise and clockwise 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" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] Figure 1 The diagram schematically illustrates the structure and positional relationship of components such as the floor-type boring and milling machine, the door shaft end column, and the laser theodolite in a machining system for a large door shaft end column plane according to one embodiment of the present invention.

[0038] refer to Figure 1 As shown, the first machining surface 11 and the second machining surface 12 at both ends of the large door hinge end post 10 are machined using a conventional vertical floor-type boring and milling machine 20. In this embodiment, the floor-type boring and milling machine used is a T6215. In other embodiments, other models of floor-type boring and milling machines may be used as needed.

[0039] One end of the gantry end post 10 is placed on the worktable of the floor-type boring and milling machine 20. The gantry end post 10 is supported by two modular leveling fixtures, which contain a four-degree-of-freedom fine-tuning mechanism. The lower middle part of the gantry end post 10 is supported by a support frame 42. The milling cutter head 21 is directly opposite the first machining surface 11 of the gantry end post 10 to be machined.

[0040] The laser theodolite 30 is positioned at the front end of the floor-type boring and milling machine 20, between the gantry end column 10 and the machine tool.

[0041] The adjustment method for the laser theodolite 30 is as follows:

[0042] 1. Centering: Fix one leg of the tripod, hold the other two legs with both hands and continuously adjust their position, while observing the crosshairs of the optical alignment device to align them with the center of the ground marker.

[0043] 2. Rough leveling: Extend and retract the tripod to center the bubble and roughly level the instrument;

[0044] 3. Precision leveling: Adjust the three leveling screws (using the left thumb method) to precisely level the instrument;

[0045] 4. Re-align: Check the optical alignment device. If it deviates from the station mark, move the instrument to accurately align it.

[0046] 5. Re-leveling: Adjust the three foot screws (using the left thumb method) to precisely level the instrument.

[0047] Figure 2 The diagram schematically illustrates the structure and positional relationships of the components in a machining system for a large door shaft end column plane according to one embodiment of the present invention, which determines the virtual track reference plane of a floor-mounted milling machine.

[0048] refer to Figure 2 As shown, the method for determining the virtual orbital reference plane of a floor-type boring and milling machine includes:

[0049] The first permanent magnet ruler 31 with G1 precision is attached to the front side of the guide rail of the floor-type milling machine 20. The second permanent magnet ruler 32 with G1 precision is attached to the rear side of the guide rail of the floor-type milling machine. The third permanent magnet ruler 33 with G1 precision is attached to a placement platform. The placement platform is positioned one gantry end post length away from the front end of the guide rail of the floor-type milling machine 20. This distance does not need to be very precise; for a 20-meter-long gantry end post 10, the error can be around 0.5-1 meter.

[0050] Adjust the X / Y / Z axes of the laser theodolite 30 so that the laser emitted by the laser theodolite 30 illuminates the same graduation point on the first permanent magnet steel ruler 31 and the second permanent magnet steel ruler 32. Then, keeping the X / Y axes stationary, adjust the Z axis so that the laser plane formed by the laser theodolite 30 on the vertical plane illuminates the third permanent magnet steel ruler 33. Adjust the position of the platform so that the laser illuminates the same graduation point on the third permanent magnet steel ruler 33. The same graduation points of the first permanent magnet steel ruler 31, the second permanent magnet steel ruler 32, and the third permanent magnet steel ruler 33 illuminated by the laser are respectively the first reference point, the second reference point, and the third reference point. The plane containing the first reference point, the second reference point, and the third reference point is the virtual track reference plane of the floor-type boring and milling machine 20.

[0051] The first permanent magnet steel ruler 31, the second permanent magnet steel ruler 32, and the third permanent magnet steel ruler 33 are the same permanent magnet steel ruler. The coplanar error of the first reference point, the second reference point, and the third reference point is ≤0.2mm.

[0052] Before determining the virtual track reference of the floor-type boring and milling machine 20, the guide rail side of the floor-type boring and milling machine 20 can be cleaned and ground until the surface roughness Ra≤1.6μm.

[0053] Figure 3 and Figure 4The diagram schematically illustrates the structure and positional relationships of the components used to determine the machining reference surface of the door hinge end post in a machining system for a large door hinge end post plane according to one embodiment of the present invention.

[0054] refer to Figure 3 and Figure 4 As shown, firstly, a center roll line (dotted line in the figure) is set on the door hinge end post 10. The first machining surface 11 and the second machining surface 2 are placed parallel to the ground. The level is set to remain stationary in the vertical direction and move only in the horizontal direction. One point is selected on each surface of the door hinge end post 10, for a total of four points. A line is drawn around the door hinge end post 10 along the four points, which is the center roll line of the door hinge end post 10. The surface formed by these four points is in the same horizontal plane.

[0055] The gantry end column 10 is hoisted onto the worktable of the floor-type boring and milling machine using a crane. The two ends of the gantry end column 10 are supported by the first leveling fixture 41 and the second leveling fixture 43, respectively. Both leveling fixtures are equipped with a four-degree-of-freedom fine-tuning mechanism. The middle part of the gantry end column 10 can also be supported by a support frame 42.

[0056] Four rolling permanent magnet steel rulers (first rolling permanent magnet steel ruler 51, second rolling permanent magnet steel ruler 52, third rolling permanent magnet steel ruler 53, and fourth rolling permanent magnet steel ruler 54) are respectively placed at both ends of the plane with the longer center rolling line on the gantry end post 10. The same end faces of the four rolling permanent magnet steel rulers (first rolling permanent magnet steel ruler 51, second rolling permanent magnet steel ruler 52, third rolling permanent magnet steel ruler 53, and fourth rolling permanent magnet steel ruler 54) coincide with the center rolling line in the same direction. The free ends of the rolling permanent magnet steel rulers 51, 52, 53, and 54 face the direction of the floor-type boring and milling machine 20. (Reference) Figure 3 and 4 As shown.

[0057] Using the laser theodolite 30 rotating on a vertical plane to form a laser plane, the position of the door shaft end post 10 is adjusted using the first leveling fixture 41 and the second leveling fixture 43, so that the laser plane illuminates the same scale point on the four rolling permanent magnet steel rulers (first rolling permanent magnet steel ruler 51, second rolling permanent magnet steel ruler 52, third rolling permanent magnet steel ruler 53, and fourth rolling permanent magnet steel ruler 54). The distance between the four scale points and the virtual track reference plane is equal, that is, the plane where the center rolling line of the door shaft end post 10 is located is parallel to the virtual track reference plane of the floor-type boring and milling machine 20 (the plane where the first reference point, the second reference point, and the third reference point are located), and parallel to the machining surface of the milling cutter head 21, and the first machining surface 11 is located in the machining area of ​​the floor-type boring and milling machine 20.

[0058] Machining the first machining surface 11 using a floor-type boring and milling machine may include the following steps:

[0059] (1) Roughing stage: Use φ160mm end mill (APKT diamond end mill insert), cutting parameters: speed 180r / min, feed 0.15mm / r, depth of cut 2mm, leave finishing allowance of 0.3mm;

[0060] (2) Finishing stage: Replace with φ80mm fine-tooth end mill (PCD diamond end mill insert), cutting parameters: speed 600r / min, feed 0.05mm / r, depth of cut 0.3mm.

[0061] After machining, the first machining surface 11 of the door hinge end post 10 is parallel to the guide rail of the floor-type boring and milling machine 20, with a parallelism deviation of ≤0.25mm.

[0062] After the first machining surface 11 is machined, a crane is used to vertically rotate the door shaft end post 10 by 180°, and the two ends of the door shaft end post 10 are placed on the first leveling fixture 41 and the second leveling fixture 43 respectively. The position of the door shaft end post 10 is adjusted again by adjusting the first leveling fixture 41 and the second leveling fixture 43 in the same way as described above, so that the plane where the center roll line of the door shaft end post 10 is located is parallel to the virtual track reference plane of the floor boring and milling machine 20 and parallel to the machining surface of the milling cutter head 21, and the second machining surface 12 is located in the machining area of ​​the floor boring and milling machine 20.

[0063] The second machining surface 12 is then machined using a floor-type boring and milling machine 20 following the steps described above.

[0064] Finally, a theodolite can be used to check whether the parallelism of the first machined surface 11 and the second machined surface 12 of the gate shaft end post 10 is within the allowable tolerance range of less than 1 mm.

[0065] Figure 5 The diagram schematically illustrates the structure of a leveling fixture in a method for machining the flat surface of a large door hinge end column according to an embodiment of the present invention.

[0066] refer to Figure 5 As shown, the leveling fixture includes a base 431, a slide rail 433, a jack 432, a support plate 434, a safety device 435, and a slider 436.

[0067] A slide rail 433 is mounted on the upper surface of the base 431. A slider 436 is adapted to the slide rail 433 and is mounted on the slide rail 433. A jack 432 is provided at each of the four corners of the upper surface of the slider 436, and a safety device 435 is provided between two jacks 432. A support plate 434 is provided above the jacks 432.

[0068] The pallet 434 can be moved in the X and Z directions by adjusting the jacks 432 and the slider 436. The jacks 432 can be adjusted independently. After the position of the gantry end column 10 is adjusted, a safety device 435 is placed between the two jacks 432 to prevent jack failure or tilting / displacement of the gantry end column 10 during processing.

[0069] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A machining system for the end face of a large door hinge, wherein the end face of the large door hinge includes a first machining surface and a second machining surface located at both ends of the same side, characterized in that: Including floor-type boring and milling machines; A first permanent magnet steel ruler is located on the front side of the guide rail of a floor-type boring and milling machine; A second permanent magnet steel ruler is located on the rear side of the guide rail of a floor-type boring and milling machine; A third permanent magnet ruler is located at a position one door hinge end post length away from the first permanent magnet ruler, along the extension line of the line connecting the same scale of the first and second permanent magnet rulers. Four rolling permanent magnet steel rulers are respectively placed at both ends of the plane with the longer center rolling line on the end post of the door hinge, and one end face of each of the four rolling permanent magnet steel rulers coincides with the center rolling line in the same direction. A laser theodolite is used to determine the same scale points of the first, second, and third permanent magnet steel rulers, as well as the same scale points of the four rolling permanent magnet steel rulers. Crane, used for hoisting the end posts of the portal frame.

2. The processing system according to claim 1, characterized in that, It also includes a first leveling fixture and a second leveling fixture respectively supporting the two ends of the door hinge end post; Both the first leveling fixture and the second leveling fixture contain a four-degree-of-freedom fine-tuning mechanism.

3. The processing system according to claim 2, characterized in that, The first leveling fixture and the second leveling fixture each include a base, a slide rail, a jack, a support plate, a safety device, and a slider. The slide rail is set on the upper surface of the base, and the slider is adapted to the slide rail and is mounted on the slide rail; A jack is installed at each of the four corners of the upper surface of the slider, and a safety device is installed between two jacks. The support plate is positioned above the jack.

4. The processing system according to claim 2, characterized in that, It also includes a support frame that rests on the middle part of the end post of the door hinge.

5. The processing system according to claim 1, characterized in that, The surface roughness Ra of the guide rail side of the floor-type boring and milling machine is ≤1.6μm.

6. The processing system according to claim 1, characterized in that, The coplanar error of the first, second, and third reference points is ≤0.2mm.

7. The processing system according to any one of claims 1-6, characterized in that, The parallelism deviation between the plane where the center roller line of the door shaft end column is located and the plane where the same scale point of the first permanent magnet steel ruler, the second permanent magnet steel ruler and the third permanent magnet steel ruler is located is ≤0.25mm.

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