Adjusting and fixing device for large thin-wall shell ring machining

Abstract

An adjusting and fixing device for large thin-wall shell ring machining comprises a flange roundness adjusting tool and a supporting tool. A flange roundness adjusting tool is provided with an inner ring body and an outer ring body, a fixedly welded supporting partition plate is further arranged between the inner ring body and the outer ring body, adjusting bolts are distributed on the outer ring body along the circumference and matched with the outer ring body in a threaded mode, the adjusting bolts stretch out in the radial direction, and the stretching-out ends are provided with protective caps. The supporting tool is provided with a cross-shaped supporting main body, and each radial end of the supporting main body is provided with a supporting bolt and a supporting main body center hole which abut against the inner circle of a flange at the outer end of the thin-wall shell ring. In this way, the tool turns over to a vertical state after machining is finished, and the thin-walled cylinder cannot deform after the tool is adjusted and detached.

Description

Technical Field

[0001] The patent of this invention relates to the field of mechanical processing technology, and in particular to a tooling device for high-precision processing of large thin-walled cylinder sections on a heavy-duty horizontal lathe. Background Art

[0002] A large thin-walled cylinder section has a diameter of more than 2 meters, a wall thickness of about 20mm, and a length of more than 6 meters. It is a typical thin-walled, large-diameter cylinder workpiece. The characteristic of this part is that it is easy to deform during the processing. If some anti-deformation measures are not taken, the product accuracy is generally low.

[0003] The cylinder segment product in the present invention is used for vertical assembly, and multiple cylinder segments are connected by flanges and bolts at the ends. However, because the cylinder segment is processed horizontally during the processing, it is deformed by gravity, and thin-walled parts are prone to workpiece deformation during processing. Therefore, when assembling the two cylinder segments, the four-quadrant marks on the outer circle of the connecting flange often cannot be accurately aligned, and the connecting bolt holes are seriously misaligned, and the bolts cannot be inserted normally, resulting in the need for multiple product repairs. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that large thin-walled cylinder segments cannot be smoothly installed during the processing and assembly process. In order to avoid this situation, the present invention adopts reverse thinking and reverses from the assembly state. The segmented thin-walled cylinder segment can also maintain the accuracy of the vertical state during the horizontal processing process, which is intended to solve the problem of deformation of the workpiece and the inability to smoothly assemble. A more accurate processing, adjustment and fixing device for large thin-walled cylinder segments is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A large thin-walled cylinder section processing adjustment and fixing device is characterized in that: there is a flange roundness adjustment tool, which can adjust the flange roundness in a horizontal state by adjusting the bolts to restore the cylinder section to the roundness in a vertical state; there is also a support tool to realize the support positioning of the center of the lathe tailstock to complete the turning process; the flange roundness adjustment tool has an inner ring body and an outer ring body, and there is a fixed welded support partition between the inner ring body and the outer ring body, and the outer ring body has adjustment bolts distributed along the circumference and matched with the outer ring body thread, the adjustment bolts extend radially, and the extended ends are provided with protective caps; the support tool has a cross-shaped support body, and each radial end of the support body is provided with a support bolt that presses on the inner circle of the flange at the outer end of the thin-walled cylinder section, and the center position of the support body is provided with a center hole.

[0007] The large thin-walled cylinder section processing adjustment and fixing device of the present invention comprises an inner ring body, an outer ring body and a connected supporting partition plate, which together form the main frame of the flange roundness adjustment tool. The outer edge thread of the main frame cooperates with the adjustment bolt. By applying external force to the adjustment bolt, the roundness of the outer circle can be adjusted. The copper protective cap on the top is used to protect the inner wall of the thin-walled cylinder from being scratched. The supporting tool is composed of a supporting body, a supporting bolt and a top hole. The top hole realizes the support and positioning function of the machine tool for the workpiece. The flange roundness adjustment tool can be set at the flanges at both ends of the large thin-walled cylinder section, or at a thin-walled cylinder near the flange or a thin-walled cylinder across the flange and near the flange. In particular, the bolts distributed along the circumferential direction are two circles of side-by-side adjustment bolts. The protective caps on the tops of the bolts distributed in one circle are against the thin-walled cylinder near the flange, and the protective caps on the tops of the bolts distributed in another circle are against the flange. The two circles of adjustment bolts cooperate to adjust the roundness of the flange.

[0008] The monomer of a large thin-walled cylinder segment is a thin-walled cylinder segment (referred to as a cylinder segment). The thin-walled cylinder segment has a vertical state and a horizontal state during the processing process. Due to the effect of gravity, the roundness state of the cylinder segment is inconsistent. The larger the diameter, the greater the state difference. To solve this problem, the measures taken by the present invention are to make a special tool. The flange roundness adjustment tool uses a circular structure, and there are adjustment bolts (such as two circles of adjustment bolts) around it to adjust the outer circle shape of the cylinder segment, so that the cylinder segment flange can be adjusted to a vertical roundness state in a horizontal state; the flange roundness adjustment tool structure includes an inner ring body, an outer ring body, a support partition, an adjustment bolt and a top cap, and the cylinder segment is deformed and adjusted by applying an external force by screwing the bolts. The supporting body (such as a cross-shaped) of the supporting tool is provided with support bolts at each radial end of the supporting body that press against the inner circle of the outer end flange of the thin-walled cylinder segment, which can also help adjust the cylinder segment flange to a vertical roundness state. In this way, after the processing is completed, the tool is turned over to a vertical state, and the thin-walled cylinder is ensured not to be deformed after the adjustment and removal of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the large thin-walled cylinder segment processing adjustment and fixing device of the present invention being arranged on a cylinder segment processing machine tool.

[0010] In the figure: 1. Chuck claw 2. Roundness adjustment tool 3. Thin-walled cylinder section 4. Support tool 5. End of bed center

[0011] Figure 2 This is a schematic diagram of the cylinder segment flange roundness adjustment tool of the large thin-walled cylinder segment processing adjustment and fixing device of the present invention being set on the end flange of the large thin-walled cylinder segment.

[0012] Figure 3 This is a schematic diagram of the cylinder segment flange roundness adjustment tool of the large thin-walled cylinder segment processing adjustment fixture of the present invention being arranged near the end flange of the large thin-walled cylinder segment.

[0013] Figure 4It is a partially enlarged schematic diagram of the cylinder segment flange roundness adjustment tooling of the large thin-walled cylinder segment processing adjustment and fixing device of the present invention.

[0014] In the figure: 6, inner ring body 7, outer ring body 8, protective cap 9, adjustment bolt 10, support partition

[0015] Figure 5 This is a schematic diagram of the support fixture of the large thin-walled cylinder segment processing adjustment and fixing device of the present invention being arranged on the flange of the cylinder segment.

[0016] In the figure: 11. Flange of the cylinder section 12. Support tooling DETAILED DESCRIPTION

[0017] The following further describes the implementation examples of the present invention in conjunction with the accompanying drawings:

[0018] This large thin-walled cylinder section processing adjustment and fixing device as shown in the attached figure has a flange roundness adjustment tool and a support tool; the flange roundness adjustment tool has an inner ring body and an outer ring body, and there is a fixed welded support partition between the inner ring body and the outer ring body, and the outer ring body has two rows of adjustment bolts arranged in parallel along the circumference and matched with the outer ring body thread, and the adjustment bolts extend radially, and the extended ends are provided with copper protective caps; the support tool has a cross-shaped support body, and each radial end of the support body is provided with a support bolt that presses on the inner circle of the flange at the outer end of the thin-walled cylinder section, and a top hole is opened at the center of the support body. By adjusting the adjustment bolt, the flange roundness can be adjusted in a horizontal state, so that the cylinder section can be restored to the roundness of the vertical state, and the top support positioning of the lathe tailstock can be realized, which is convenient for completing the turning process. The inner ring body, the outer ring body and the connected support partition together form the main frame of the flange roundness adjustment tool, and the outer edge thread of the main frame cooperates with the adjustment bolt. By applying external force to the adjustment bolt, the roundness of the outer circle can be adjusted, and the top copper protective cap is used to protect the inner wall of the thin-walled cylinder from being scratched. The supporting tooling is composed of a supporting body, supporting bolts, and a center hole, and the center is used to realize the support and positioning functions of the machine tool on the workpiece.

[0019] According to the assembly status, place the thin-walled cylinder segment vertically on the ground platform, measure the actual dimensions of the outer circle of the flanges at both ends, and record the actual dimensions of at least 8 lines in the M direction.

[0020] Place the thin-walled cylinder (part 3) horizontally, measure the actual size of the outer circle of the flanges at both ends in this state, install the adjustment tooling (part 2) inside the two ends of the cylinder, and continuously adjust it through the adjustment bolts (part 9), and finally adjust it to the size and roundness of the vertical state. Then install the support tooling (part 4) at the tail end to support and fix it.

[0021] The whole is hoisted to the horizontal lathe, the headstock chuck claw (Part 1) is fixed, and the tailstock (Part 5) is supported by the top. According to the algorithm of rounding the length of the four-quadrant 1 / 4 pitch circle inversely, the flange diameter size to be processed is calculated, and the outer circle of the flange is machined according to the size, and then the four-quadrant position is engraved according to the rounded 1 / 4 arc length. In the subsequent process, all the connection holes on the flange are drilled based on the engraved position.

Claims

1. A large thin-walled cylinder section processing, adjustment and fixing device, characterized in that: There are flange roundness adjustment tooling and support tooling; the flange roundness adjustment tooling has an inner ring body and an outer ring body, and there is a welded support partition between the inner ring body and the outer ring body. The outer ring body has adjustment bolts distributed along the circumference and matched with the outer ring body threads. The adjustment bolts extend radially and have protective caps on the extended ends; the support tooling has a cross-shaped support body, and each radial end of the support body is provided with support bolts that press against the inner circle of the flange at the outer end of the thin-walled cylinder section, and the center position of the support body has a top hole.

2. According to the large thin-walled cylinder section processing adjustment and fixing device described in claim 1, the inner ring body, the outer ring body and the connected supporting partition together constitute the main frame of the flange roundness adjustment tooling, and the outer edge thread of the main frame cooperates with the adjusting bolt. By applying external force to the adjusting bolt, the roundness of the outer circle can be adjusted, and the top copper protective cap is used to protect the inner wall of the thin-walled cylinder from being scratched.

3. The large thin-walled cylinder section processing, adjustment and fixing device according to claim 1 or 2, characterized in that: The supporting tooling is composed of a supporting body, supporting bolts, and a center hole, and the center is used to realize the support and positioning functions of the machine tool on the workpiece.

4. The large thin-walled cylinder section processing, adjusting and fixing device according to claim 1 or 2, characterized in that: The adjusting bolts are arranged in two circles in parallel along the circumferential direction.

5. The large thin-walled cylinder section processing, adjustment and fixing device according to claim 3 is characterized in that: The adjusting bolts are arranged in two circles in parallel along the circumferential direction.

6. The large thin-walled cylinder section processing, adjusting and fixing device according to claim 1 or 2, characterized in that: The supporting body is a cross-shaped supporting body.

7. The large thin-walled cylinder section processing, adjustment and fixing device according to claim 3 is characterized in that: The supporting body is a cross-shaped supporting body.

8. The large thin-walled cylinder section processing, adjustment and fixing device according to claim 4 is characterized in that: The supporting body is a cross-shaped supporting body.

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