Correct alignment device for large workpiece of vertical rotary machine tool and operation method of correct alignment device

Abstract

The correct alignment device comprises a frame body, a first sliding groove is formed in the front end face of the upper side of the frame body, and a first upper sliding block and a second upper sliding block are slidably connected into the first sliding groove; supporting assemblies are fixedly connected to the front sides of the first upper sliding block and the second upper sliding block. Each supporting assembly comprises a fixing rod, a push rod, a rear sliding block and a turning tool rest. The fixing rods are fixedly connected to the front sides of the first upper sliding block and the second upper sliding block correspondingly. The push rod is slidably sleeved in the bottom side of the fixed rod; the rear slider is fixedly connected to the rear side of the push rod; the tool rest is fixedly connected to the bottom side of the push rod; by adjusting the position height of the blank workpiece, the problem that the workpiece is scrapped due to inaccurate machining when the blank workpiece is symmetrically corrected according to a clamping jaw or a cushion block when the irregular blank workpiece is machined by an existing lathe is solved. Machining of the blank workpiece is facilitated, and scrapping of the blank workpiece is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of blank workpiece correction, and in particular to a correct alignment device for a large workpiece of a vertical rotary machine tool and an operating method thereof. Background Art

[0002] Vertical lathes are large-scale mechanical equipment used to process large and heavy workpieces with large radial dimensions and relatively small axial dimensions and complex shapes. The spindle of a vertical lathe is vertical and has a circular worktable for mounting the workpiece. The worktable is in a horizontal position, which makes it easier to align and clamp the workpiece. The gravity of the workpiece and the worktable is borne by the bed rails or thrust bearings, so the spindle is not prone to bending.

[0003] When aligning existing workpieces, the blank is generally placed horizontally on the workbench, and then corrected in a two-point symmetrical or four-point symmetrical manner. This alignment method is more suitable for processed products or products with a correction base surface. Since the blank is an irregular shape, there are many uneven places. During the processing, the protruding parts will have too much machining allowance, resulting in weak wall thickness or even damage. The turning tool may not be able to touch the sunken parts, resulting in inability to process. Generally, in this case, the manufacturer will identify the blank as having quality problems and directly scrap it, causing huge losses. For this reason, the application proposes a method that can solve the above technical problems and quickly realize the correct alignment of the vertical lathe when processing the blank workpiece, so as to facilitate the processing of the blank workpiece and avoid the scrapping of the blank workpiece. Summary of the invention

[0004] The embodiment of the present application provides a correct alignment device for large workpieces of a vertical rotating machine tool and an operating method thereof. By adjusting the position height of the blank workpiece itself, the convex points on the front side of the blank workpiece and the concave points on the back side, as well as the concave points on the front side and the convex points on the back side, determined according to the cutting amount, are symmetrical. This solves the problem of inaccurate machining of irregular blank workpieces by existing lathes that symmetrically correct the blank workpieces based on claws or pads, resulting in the scrapping of the workpieces. The correction method of the present application not only quickly realizes the correct alignment of the lathe when machining the blank workpiece, facilitates the machining of the blank workpiece, but also avoids the scrapping of the blank workpiece.

[0005] The embodiment of the present application provides a device for correctly aligning a large workpiece of a vertical rotary machine tool, including a frame, characterized in that:

[0006] The front end surface of the upper side of the frame body is provided with a slide groove 1, in which an upper slider 1 and an upper slider 2 are slidably connected; a rotating shaft 1 is rotatably connected in the slide groove 1, and the rotating shaft 1 passes through the upper slider 1 and the upper slider 2, and is rotatably connected to the upper slider 1 and the upper slider 2; a motor 1 is fixedly connected to the left outer wall on the upper side of the frame body, and the motor 1 is fixedly connected to the rotating shaft 1;

[0007] The front sides of the upper slider 1 and the upper slider 2 are fixedly connected with a support assembly, which includes a fixed rod, a push rod, a rear slider, and a tool holder;

[0008] The fixing rods are respectively fixedly connected to the front sides of the upper slider 1 and the upper slider 2; the push rod is slidably sleeved in the bottom side of the fixing rod, and the push rod and the fixing rod are fixed by bolts; the rear slider is fixedly connected to the rear side of the push rod, and is slidably connected to the slide groove 3; the tool holder is fixedly connected to the bottom side of the push rod;

[0009] The bottom side of the front end surface of the frame is fixedly connected to a workbench, on which a rough workpiece is placed; a turntable is rotatably connected to the upper side of the workbench, and a motor three is fixedly connected to the bottom side of the turntable through a rotating shaft;

[0010] The rotating disk is fixedly connected with an adjusting assembly; the adjusting assembly comprises a fixing block, a rotating rod, a connecting rod, a pushing block and an adjusting block;

[0011] The fixed block is fixedly connected to the upper side of the turntable, and a threaded hole is provided in the fixed block; the rotating rod is rotatably connected to the fixed block, and a threaded rod is selected, and the rotating rod is rotatably connected to the fixed block through the thread; the connecting rod is rotatably connected to the left side of the rotating rod; the pushing block is fixedly connected to the left side of the connecting rod; the adjusting block is slidably installed in the fixed block, and its upper side extends to the outside of the upper side of the fixed block, and a spring tube is fixedly connected between the bottom side of the adjusting block and the inner wall of the bottom side of the fixed block.

[0012] Furthermore, a support rod is fixedly connected between the front slider on the left side of the front end surface of the frame body and the front slider on the right side of the front end surface of the frame body, and a slide groove three is arranged on the front end surface of the support rod.

[0013] Furthermore, the rotating shaft 1 and the rotating shaft 2 are both threaded rods; threaded holes are provided on the upper slider 1, the upper slider 2 and the front slider, and the rotating shaft 1 and the rotating shaft 2 are rotatably connected to the upper slider 1, the upper slider 2 and the front slider respectively through threads.

[0014] Furthermore, the thread directions of the threaded holes of the upper slider 1 and the upper slider 2 are symmetrically arranged.

[0015] Furthermore, a trapezoidal slide groove is provided in the adjusting block, the push block is arranged in a trapezoidal shape, the push block is installed in the trapezoidal slide groove, and the inclined surface of the push block is in contact with the inclined surface of the trapezoidal slide groove and is slidably connected thereto.

[0016] An operating method for a correct alignment device for a large workpiece of a vertical rotary machine tool, the specific operating process is as follows:

[0017] (1) First, check whether the rough workpiece to be processed is uniform, that is, whether the wall thickness is the same at all locations in the rough state;

[0018] (2) placing the blank workpiece inspected in step (1) above in the middle of the workbench, and then adjusting the position of the turning tool holder so that the turning tool touches the outer edge of the blank workpiece;

[0019] (3) Then the turntable on the workbench rotates one circle, turning the outer ring of the blank workpiece one circle, turning out a small opening, thereby observing the cutting amount of the blank workpiece, thereby observing the concave and convex points of the blank workpiece;

[0020] (4) Then use a caliper or depth gauge to find the place where the blank workpiece has the largest or smallest cutting amount. That is, the position where the blank workpiece is turned the most is the convex point, and the position where it is turned the least or not turned is the concave point;

[0021] (5) After determining the convex point and the concave point (taking the front of the blank workpiece as the basis), the convex point on the front of the blank workpiece is determined as the base point, and the concave point is found on the back of the blank workpiece as the symmetric basis of 180°. Similarly, the concave point on the front of the blank workpiece is determined as the base point, and the convex point is found on the back of the blank workpiece as the symmetric basis of 180°;

[0022] (6) The symmetrical point of the convex point on the rough workpiece generally has a different cutting depth from the convex point. In this case, the position of the symmetrical point of the convex point on the rough workpiece needs to be adjusted upward to keep the cutting depth on both sides consistent; similarly, the cutting depth of the symmetrical point of the concave point on the rough workpiece is different from that of the concave point. In this case, the position of the symmetrical point of the concave point on the rough workpiece needs to be adjusted upward or downward to keep the cutting depth on both sides consistent;

[0023] (7) Finally, the turning tool can be brought close to the blank workpiece, and the turntable on the workbench can be turned on to carry out subsequent processing on the calibrated blank workpiece.

[0024] When the position of the symmetrical point on the blank workpiece is further raised or lowered, since the position height of the blank workpiece has been adjusted after the symmetrical point is found on the blank workpiece, it should be noted that when the position of the symmetrical point on the blank workpiece is raised or lowered, the balance between the symmetrical point and the convex point should be avoided to be destroyed.

[0025] Furthermore, the protruding points and the recessed points of the rough workpiece are selected as smooth surfaces.

[0026] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: by adjusting the position height of the blank workpiece itself, the convex point on the front side of the blank workpiece and the concave point on the back side, as well as the concave point on the front side of the blank workpiece determined according to the cutting amount are symmetrical, thereby solving the problem of inaccurate processing and resulting in workpiece scrapping due to symmetrical correction of the blank workpiece by claws or pads when processing irregular blank workpieces on existing lathes, thereby avoiding production loopholes and improving production quality. The correction method of the present application not only quickly realizes the correct alignment of the lathe when processing the blank workpiece, facilitates the processing of the blank workpiece, but also avoids the scrapping of the blank workpiece; its correction method is applicable to all machine tools and can completely cover traditional correction methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the placement of the blank workpiece for this application;

[0028] Figure 2 This is a schematic diagram of the turntable structure for this application;

[0029] Figure 3 A schematic diagram of the structural adjustment components for this application;

[0030] In the figure: 10 frame, 20 motor 1, 21 upper slider 1, 22 rotating shaft 1, 23 slide groove 1, 24 upper slider 2, 30 sliding assembly, 31 motor 2, 32 slide groove 2, 33 front slider, 34 rotating shaft 2, 40 support rod, 41 slide groove 3, 50 support assembly, 51 fixed rod, 52 push rod, 53 rear slider, 54 tool holder, 60 workbench, 61 turntable, 70 rough workpiece, 80 adjustment assembly, 81 fixed block, 82 rotating rod, 83 connecting rod, 84 push block, 85 spring tube, 86 trapezoidal slide groove, 87 adjustment block. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] Embodiment 1

[0035] See also Figure 1 A device for correctly aligning a large workpiece of a vertical rotary machine tool comprises a frame 10,

[0036] A slide groove 23 is provided on the front end surface of the upper side of the frame body 10, and an upper slider 21 and an upper slider 24 are slidably connected in the slide groove 23; a rotating shaft 22 is rotatably connected in the slide groove 23, and the rotating shaft 22 passes through the upper slider 21 and the upper slider 24, and is rotatably connected to the upper slider 21 and the upper slider 24; a motor 20 is fixedly connected to the left outer wall of the upper side of the frame body 10, and the motor 20 is fixedly connected to the rotating shaft 22 to provide power for the rotation of the rotating shaft 22;

[0037] The left side of the front end of the frame 10 is provided with a sliding assembly 30, which is provided with two sets, and the other set of sliding assembly 30 is provided on the right side of the front end of the frame 10;

[0038] The sliding assembly 30 includes a second slide slot 32, a second motor 31, a second rotating shaft 34 and a front sliding block 33;

[0039] The second slide groove 32 is opened on the left side of the front end surface of the frame body 10, the front slider 33 is slidably connected in the second slide groove 32, the second motor 31 is fixedly connected in the second slide groove 32, the second rotating shaft 34 is fixedly connected to the upper side of the second motor 31, the second rotating shaft 34 is rotatably connected in the second slide groove 32 and passes through the front slider 33, and is rotatably connected to the front slider 33;

[0040] A support rod 40 is fixedly connected between the front slider 33 on the left side of the front end surface of the frame body 10 and the front slider 33 on the right side of the front end surface of the frame body 10 , and a slide groove 3 41 is provided on the front end surface of the support rod 40 .

[0041] The front sides of the upper slider 1 21 and the upper slider 2 24 are fixedly connected with a support assembly 50, and the support assembly 50 includes a fixed rod 51, a push rod 52, a rear slider 53, and a tool holder 54;

[0042] The fixed rod 51 is fixedly connected to the front sides of the upper slider 1 21 and the upper slider 2 24 respectively; the push rod 52 is slidably mounted in the bottom side of the fixed rod 51, and the push rod 52 and the fixed rod 51 are fixed by bolts; the rear slider 53 is fixedly connected to the rear side of the push rod 52, and is slidably connected in the slide groove 3 41; the tool holder 54 is fixedly connected to the bottom side of the push rod 52.

[0043] A workbench 60 is fixedly connected to the bottom side of the front end surface of the frame body 10 , and a blank workpiece 70 is placed on the workbench 60 .

[0044] The rotating shaft 1 22 and the rotating shaft 2 34 are both threaded rods; the upper slider 1 21, the upper slider 24 and the front slider 33 are all provided with threaded holes, and the rotating shaft 1 22 and the rotating shaft 2 34 are rotatably connected with the upper slider 1 21, the upper slider 24 and the front slider 33 respectively through threads;

[0045] The threaded holes of the upper slider 1 21 and the upper slider 2 24 are symmetrically arranged in the threaded directions, so that when the rotating shaft 1 22 rotates, the upper slider 1 21 and the upper slider 2 24 can slide in relative or opposite directions.

[0046] A turntable 61 is rotatably connected to the upper side of the workbench 60, and a motor 3 is fixedly connected to the bottom side of the turntable 61 via a rotating shaft, and the motor 3 provides power for the turntable to rotate.

[0047] An adjustment assembly 80 is fixedly connected to the turntable 61, and is used to adjust the position and height of the rough workpiece 70, so as to facilitate the staff to perform correction processing on the rough workpiece 70;

[0048] There are at least four adjustment components 80, which are evenly distributed on the upper side of the turntable 61 with the circle of the turntable 61 as the rotation point;

[0049] The adjustment assembly 80 includes a fixing block 81, a rotating rod 82, a connecting rod 83, a pushing block 84, and an adjustment block 87;

[0050] The fixed block 81 is fixedly connected to the upper side of the turntable 61, and a threaded hole is provided therein; the rotating rod 82 is rotatably connected to the fixed block 81, and a threaded rod is selected. The rotating rod 82 is rotatably connected to the fixed block 81 through a thread; the connecting rod 83 is rotatably connected to the left side of the rotating rod 82; the pushing block 84 is fixedly connected to the left side of the connecting rod 83; the adjusting block 87 is slidably installed in the fixed block 81, and its upper side extends to the outside of the upper side of the fixed block 81, and a spring tube 85 is fixedly connected between the bottom side of the adjusting block 87 and the inner wall of the bottom side of the fixed block 81.

[0051] A trapezoidal slide groove 86 is provided in the adjusting block 87 , and the push block 83 is arranged in a trapezoidal shape. The push block 83 is installed in the trapezoidal slide groove 86 , and the inclined surface of the push block 83 is in contact with the inclined surface of the trapezoidal slide groove 86 and is slidably connected thereto.

[0052] The spring tube 85 is made of industrial spring, which has high hardness and is not easy to deform.

[0053] That is, after the four corners or outer edges of the blank workpiece 70 are placed on the fixed block 81, the rotating rod 82 is rotated to screw it into the fixed block 81 or screw it out of the fixed block 81, and the push block 84 is driven by the connecting rod 83 to slide left and right in the trapezoidal slide groove 86. As the push block 84 slides to the left, the adjustment block 87 is pushed upward. The push block 84 slides to the right combined with the pulling force of the spring tube 85 pulls the adjustment block 87 downward, thereby adjusting the position height of each edge of the blank workpiece 70 to facilitate the staff to calibrate the blank workpiece 70.

[0054] The rough workpiece is corrected according to its alignment device, and the specific operation process is as follows:

[0055] (1) First, check whether the rough workpiece to be processed is uniform, that is, whether the wall thickness is the same at all locations in the rough state;

[0056] (2) placing the blank workpiece inspected in step (1) above in the middle of the workbench, and then adjusting the position of the turning tool holder so that the turning tool touches the outer edge of the blank workpiece;

[0057] (3) Then the turntable on the workbench rotates one circle, turning the outer ring of the blank workpiece one circle, turning out a small opening, thereby observing the cutting amount of the blank workpiece, thereby observing the concave and convex points of the blank workpiece;

[0058] (4) Then use a caliper or depth gauge to find the place where the blank workpiece has the largest or smallest cutting amount. That is, the position where the blank workpiece is turned the most is the convex point, and the position where it is turned the least or not turned is the concave point;

[0059] (5) After determining the convex point and the concave point (taking the front of the blank workpiece as the basis), the convex point on the front of the blank workpiece is determined as the base point, and the concave point is found on the back of the blank workpiece as the symmetric basis of 180°. Similarly, the concave point on the front of the blank workpiece is determined as the base point, and the convex point is found on the back of the blank workpiece as the symmetric basis of 180°;

[0060] (6) The symmetrical point of the convex point on the rough workpiece generally has a different cutting depth from the convex point. In this case, the position of the symmetrical point of the convex point on the rough workpiece needs to be adjusted upward to keep the cutting depth on both sides consistent; similarly, the cutting depth of the symmetrical point of the concave point on the rough workpiece is different from that of the concave point. In this case, the position of the symmetrical point of the concave point on the rough workpiece needs to be adjusted upward or downward to keep the cutting depth on both sides consistent;

[0061] (7) Finally, the turning tool can be brought close to the blank workpiece, and the turntable on the workbench can be turned on to carry out subsequent processing on the calibrated blank workpiece.

[0062] The adjustment of the height of the blank workpiece in (6) above can be operated by other mechanical tools such as adjustment components;

[0063] When the position of the symmetrical point on the blank workpiece is raised or lowered, since the position height of the blank workpiece has been adjusted after the symmetrical point on the blank workpiece is found, it should be noted that when the position of the symmetrical point on the blank workpiece is raised or lowered, the balance between the symmetrical point on the blank workpiece should be avoided to avoid destroying the balance between the symmetrical point and the symmetrical point. Generally, the staff is required to observe closely and compare the values ​​multiple times with a caliper and a depth gauge to ensure the accuracy of the blank workpiece after correction.

[0064] The protruding points and recessed points of the rough workpiece are generally selected from smoother surfaces.

[0065] The wall thickness of the rough workpiece is different, and the thickness point cannot exist alone, but at least two, or even more, places. Therefore, at least two convex points and concave points are selected on the rough workpiece respectively;

[0066] Due to the irregularity of the rough workpiece, there are many combinations of thick and thin points. Therefore, the irregular symmetry of the concave and convex points is used as the basis (note that it is irregular) rather than the symmetry of the pad or the claw. The convex points control the thickness of the front wall, and the concave points control the thickness of the back wall. The rough turning tool processing rules (the convex points on the front correspond to the concave points on the back, and the concave points on the front correspond to the convex points on the back) are as follows: the position where the front turning tool has a large amount of cutting is the position where the back cutting amount is small, and vice versa.

[0067] Correction of the front and back sides of the blank workpiece: When correcting the front side of the blank workpiece, first correct it with the convex point (irregular symmetry). While the convex point is symmetrical, the concave point is taken into consideration. The position of the concave point is the convex point on the back side of the blank workpiece. While the concave and convex points restrain each other, they can be borrowed, and the borrowing range takes the middle value.

[0068] The symmetric point of the protruding point on the front side of the blank workpiece and the symmetric point on the back side of the blank workpiece are selected by searching on the defective blank workpiece with 180° as the symmetry line; the same is true for the concave point.

[0069] In the later actual operation process, the correction method of this application can be adopted with the cooperation of professionals to quickly realize the alignment of irregular blank workpieces, maximize the use of blank workpieces, avoid scrapping of blank workpieces, reduce the waste of resources of manufacturers, ensure production quality and reduce cost expenditure.

[0070] The technical scheme in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: by adjusting the position height of the blank workpiece itself, the convex point on the front side of the blank workpiece and the concave point on the back side determined according to the cutting amount are symmetrical, and the concave point on the front side of the blank workpiece and the convex point on the back side are symmetrical, which solves the problem of inaccurate processing of irregular blank workpieces by existing lathes based on symmetrical correction of the blank workpiece by claws or pads, resulting in the scrapping of workpieces, avoids production loopholes, maximizes the utilization of irregular blanks, and improves production quality. The correction method of the present application not only quickly realizes the correct alignment of the lathe when processing the blank workpiece, facilitates the processing of the blank workpiece, but also avoids the scrapping of the blank workpiece; its correction method is applicable to all machine tools and can completely cover traditional correction methods.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for correctly aligning a large workpiece of a vertical rotary machine tool, comprising a frame, characterized in that: The front end surface of the upper side of the frame body is provided with a slide groove 1, in which an upper slider 1 and an upper slider 2 are slidably connected; a rotating shaft 1 is rotatably connected in the slide groove 1, and the rotating shaft 1 passes through the upper slider 1 and the upper slider 2, and is rotatably connected to the upper slider 1 and the upper slider 2; a motor 1 is fixedly connected to the left outer wall on the upper side of the frame body, and the motor 1 is fixedly connected to the rotating shaft 1; The front sides of the upper slider 1 and the upper slider 2 are fixedly connected with a support assembly, which includes a fixed rod, a push rod, a rear slider, and a tool holder; The fixing rods are respectively fixedly connected to the front sides of the upper slider 1 and the upper slider 2; the push rod is slidably sleeved in the bottom side of the fixing rod, and the push rod and the fixing rod are fixed by bolts; the rear slider is fixedly connected to the rear side of the push rod, and is slidably connected to the slide groove 3; the tool holder is fixedly connected to the bottom side of the push rod; The bottom side of the front end surface of the frame is fixedly connected to a workbench, on which a rough workpiece is placed; a turntable is rotatably connected to the upper side of the workbench, and a motor three is fixedly connected to the bottom side of the turntable through a rotating shaft; The rotating disk is fixedly connected with an adjusting assembly; the adjusting assembly comprises a fixing block, a rotating rod, a connecting rod, a pushing block and an adjusting block; The fixed block is fixedly connected to the upper side of the turntable, and a threaded hole is provided in the fixed block; the rotating rod is rotatably connected to the fixed block, and a threaded rod is selected, and the rotating rod is rotatably connected to the fixed block through the thread; the connecting rod is rotatably connected to the left side of the rotating rod; the pushing block is fixedly connected to the left side of the connecting rod; the adjusting block is slidably installed in the fixed block, and its upper side extends to the outside of the upper side of the fixed block, and a spring tube is fixedly connected between the bottom side of the adjusting block and the inner wall of the bottom side of the fixed block.

2. A device for correctly aligning a large workpiece of a vertical rotary machine tool as claimed in claim 1, characterized in that: The left side of the front end face of the frame body is provided with a sliding assembly, which is provided with two groups, and the other group of sliding assemblies is provided on the right side of the front end face of the frame body; the sliding assembly includes two slide grooves, two motors, two rotating shafts and a front slider; The second slide groove is opened on the left side of the front end surface of the frame, the front slider is slidably connected in the second slide groove, the second motor is fixedly connected in the second slide groove, the second rotating shaft is fixedly connected to the upper side of the second motor, the second rotating shaft is rotatably connected in the second slide groove and passes through the front slider, and is rotatably connected to the front slider.

3. The device for correctly aligning a large workpiece of a vertical rotary machine tool according to claim 1, characterized in that: A support rod is fixedly connected between the front slider on the left side of the front end surface of the frame body and the front slider on the right side of the front end surface of the frame body, and a sliding groove three is arranged on the front end surface of the support rod.

4. The device for correctly aligning a large workpiece of a vertical rotary machine tool according to claim 1, characterized in that: The rotating shaft 1 and the rotating shaft 2 are both threaded rods; the upper slider 1, the upper slider 2 and the front slider are all provided with threaded holes, and the rotating shaft 1 and the rotating shaft 2 are rotatably connected with the upper slider 1, the upper slider 2 and the front slider respectively through threads.

5. A device for correctly aligning a large workpiece of a vertical rotary machine tool as claimed in claim 4, characterized in that: The thread directions of the threaded holes of the upper sliding block 1 and the upper sliding block 2 are symmetrically arranged.

6. The device for correctly aligning a large workpiece of a vertical rotary machine tool according to claim 1, characterized in that: A trapezoidal slide groove is provided in the regulating block, the push block is arranged in a trapezoidal shape, the push block is installed in the trapezoidal slide groove, and the inclined surface of the push block is in contact with the inclined surface of the trapezoidal slide groove and is slidably connected therewith.

7. An operating method for a vertical rotary machine tool large workpiece correct alignment device, characterized in that: The specific operation process is as follows: (1) First, check whether the rough workpiece to be processed is uniform, that is, whether the wall thickness is the same at all locations in the rough state; (2) placing the blank workpiece inspected in step (1) above in the middle of the workbench, and then adjusting the position of the turning tool holder so that the turning tool touches the outer edge of the blank workpiece; (3) Then the turntable on the workbench rotates one circle, turning the outer ring of the blank workpiece one circle, turning out a small opening, thereby observing the cutting amount of the blank workpiece, thereby observing the concave and convex points of the blank workpiece; (4) Then use a caliper or depth gauge to find the place where the blank workpiece has the largest or smallest cutting amount. That is, the position where the blank workpiece is turned the most is the convex point, and the position where it is turned the least or not turned is the concave point; (5) After determining the convex point and the concave point (taking the front of the blank workpiece as the basis), the convex point on the front of the blank workpiece is determined as the base point, and the concave point is found on the back of the blank workpiece as the symmetric basis of 180°. Similarly, the concave point on the front of the blank workpiece is determined as the base point, and the convex point is found on the back of the blank workpiece as the symmetric basis of 180°; (6) The symmetrical point of the convex point on the rough workpiece generally has a different cutting depth from the convex point. In this case, the position of the symmetrical point of the convex point on the rough workpiece needs to be adjusted upward to keep the cutting depth on both sides consistent; similarly, the cutting depth of the symmetrical point of the concave point on the rough workpiece is different from that of the concave point. In this case, the position of the symmetrical point of the concave point on the rough workpiece needs to be adjusted upward or downward to keep the cutting depth on both sides consistent; (7) Finally, the turning tool can be brought close to the blank workpiece, and the turntable on the workbench can be turned on to carry out subsequent processing on the calibrated blank workpiece.

8. The operating method of the device for correctly aligning a large workpiece of a vertical rotary machine tool as claimed in claim 7, characterized in that: When the position of the concave point on the blank workpiece is raised or lowered, since the convex point has adjusted the position height of the blank workpiece after finding the symmetrical point on the blank workpiece, it is necessary to avoid destroying the balance between the convex point and its symmetrical point when the position of the concave point on the blank workpiece is raised or lowered.

9. The operating method of the device for correctly aligning a large workpiece of a vertical rotary machine tool as claimed in claim 7, characterized in that: The protruding points and recessed points of the rough workpiece are smooth surfaces when selected.

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