A horizontal measuring device and correction method for the cylindricality of a hoop tooling

Abstract

The present invention discloses a horizontal measuring device and correction method for the cylindricity of a hoop tool. The hoop tool is used to install a spiral tube assembly. The hoop tool comprises a plurality of toothed strips and a plurality of fixed rings installed on the outer surface of the spiral tube assembly. The inner side of the fixed ring is provided with a plurality of equally divided inner bosses abutting and cooperating with the toothed strips. The hoop tool is characterized in that it comprises a base for placing the hoop tool, a plurality of fixed wedges arranged on both sides of the hoop tool, and a measuring device for measuring the distance between the center point of the inner boss of the fixed ring and the base in a plumb state. The fixed wedges are placed on the base to detachably fix the hoop tool. The horizontal measuring device and correction method for the cylindricity of a hoop tool of the present invention have the advantages of no need to convert the reference multiple times and high efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of horizontal measuring devices and correction methods for cylindricity, and in particular relates to a horizontal measuring and correction method for the cylindricity of a hoop tooling. Background Art

[0002] At present, the tube bundle assembly of the direct current steam generator of the nuclear power equipment is assembled by nesting multiple layers of spiral tube assemblies, and the single-layer spiral tube assembly is assembled by multiple strands of spiral tubes with equal diameters and toothed bars. The toothed bars are evenly distributed along the circumference of the spiral tube, and the toothed side faces the spiral tube. In order to realize the turning over and fitting of the single-layer spiral tube assembly, the existing technology uses a toothed bar tooling with a similar structure to the toothed bar to assemble it on the outside of the spiral tube, and uses a cable tie to tie the toothed bar tooling and the spiral tube, and then the spiral tube assembly is transported and assembled by lifting the toothed bar tooling.

[0003] A spiral tube assembly installation device and use method (patent application number: 202110868982.6) belongs to a multi-layer squirrel cage hoop tooling, which is used to hoist and install the spiral tube assembly on the spiral tube assembly installation part of the equipment. After 8 toothed bars are assembled with the tooling, a support frame is constructed to maintain the cylindricity of the spiral tube; due to the influence of factors such as the deformation of the fixing ring itself and assembly errors, after the fixing ring and the fixed support are assembled into a whole, there is a deviation in the cylindricity of the cylinder formed by the intersection of all the fixing rings and the toothed bars. In order to meet the subsequent packaging requirements of the spiral tube, the actual cylindricity needs to be measured and corrected.

[0004] At present, the existing measurement method mainly uses a laser tracker. After the end of the ring hoop is aligned, the intersection of the inner side of the fixed ring and the toothed bar is collected, and a three-dimensional model is constructed through software to analyze and calculate the cylindricity of the ring hoop assembly. The laser tracker equipment is expensive, has high operating requirements, and has high technical barriers. Generally, manufacturers will not be equipped with related equipment and personnel. When the laser tracker collects data, there are many interferences, and multiple reference conversions are required, which is inefficient.

[0005] Therefore, in view of the shortcomings of the prior art, a horizontal measurement and correction method for the cylindricity of a multi-layer squirrel cage hoop tooling is provided. Summary of the invention

[0006] In order to solve the above problems in the prior art, the present invention provides a horizontal measuring device and correction method for the cylindricity of a hoop tooling, aiming to solve the problem that when a laser tracker measures the intersection of a fixed ring and a toothed bar on the inner side of the hoop tooling, there are many interferences, multiple reference conversions are required, and the efficiency is low.

[0007] The present invention adopts the following technical solutions:

[0008] A horizontal measuring device for the cylindricity of a hoop fixture, the hoop fixture is used to install a spiral tube assembly, the hoop fixture comprises a plurality of toothed strips and a plurality of fixing rings installed on the outer surface of the spiral tube assembly, the inner side of the fixing ring is provided with a plurality of equally divided inner bosses abutting and cooperating with the toothed strips; the device comprises a base for placing the hoop fixture, a plurality of fixing wedges arranged on both sides of the hoop fixture and a measuring device for measuring the distance between the center point of the inner boss of the fixing ring in a plumb state and the base, the fixing wedges are placed on the base for detachably fixing the hoop fixture.

[0009] As a further improvement of the technical solution of the present invention, the fixed wedge block is provided with a first plane and a second plane, the first plane abuts and cooperates with the upper surface of the base, and the second plane abuts and cooperates with the outer surface of the fixing ring.

[0010] As a further improvement of the technical solution of the present invention, the measuring device is a millimeter vernier caliper.

[0011] As a further improvement of the technical solution of the present invention, the inner boss is divided into 8 equal parts, and the center points of the inner boss are marked as a, b, c, d, e, f, g, and h respectively.

[0012] As a further improvement of the technical solution of the present invention, the hoop tooling also includes a plurality of adjustment components installed between the fixing ring and the toothed bar.

[0013] As a further improvement of the technical solution of the present invention, the adjustment assembly includes a fixed block connected to the fixed ring and an adjustment block connected to the toothed bar, the adjustment block is horizontally embedded in the fixed block and is detachably fixed by bolts, and there is a gap between the adjustment block and the fixed block.

[0014] As a further improvement of the technical solution of the present invention, the adjustment block has several different radial thicknesses.

[0015] A horizontal measurement step and correction method for the cylindricity of a hoop tooling, applicable to the horizontal measurement device for the cylindricity of a hoop tooling, comprises the following steps:

[0016] S1. Before assembling the hoop fixture, select the fixing ring with better cylindricity as the reference fixing ring at the end of the hoop fixture and mark the center point of the inner boss by a machine tool;

[0017] S2, leveling the base;

[0018] S3, placing the assembled hoop tooling on the base, placing the reference fixing ring in a plumb state, measuring the point dimensions of each inner boss in turn and recording the data to ensure that the reference state of the fixing ring is good;

[0019] S4, rotating the hoop fixture until the center point a of the inner boss of the reference fixing ring is at the bottom, and then fixing it with a fixed wedge;

[0020] S5. Use a measuring device to measure the height L of the center point of the inner boss of each fixing ring in the same quadrant relative to the base in turn, and record it as La1, La2, La3...LaN, and calculate the difference △La2, △La3...△LaN of each dimension relative to La1 and record the maximum and minimum values;

[0021] S6. Repeat steps S4-S5, rotate the hoop fixture until the center points b, c, d, e, f, g, h are located at the bottom in sequence, and record them as Lb1, Lb2, Lb3...LbN; Lc1, Lc2, Lc3...LcN; ...; Lh1, Lh2, Lh3...LhN, and calculate the difference △Lb2, △Lb3...△LbN; △Lc2, △Lc3...△LcN; △Lh2, △Lh3...△LhN of each dimension relative to Lb1; Lc1; ...; Lh1, and record the maximum and minimum values;

[0022] S7, statistically calculating the height L of different inner bosses on each quadrant relative to the reference point as △Lmax and △Lmin, and determining the cylindricity of the multi-layer squirrel cage hoop fixture;

[0023] The reference values ​​△Lmax and △Lmin of the center point of the inner boss of the fixing ring relative to the center point of the inner boss of the reference fixing ring determine the cylindricity of the squirrel cage hoop fixture;

[0024] S8, installing an adjustment component according to the difference between the height L of the inner boss and the reference value, and re-measuring the height L of the replaced inner boss;

[0025] S9, repeat step S8 until all replacements are completed.

[0026] As a further improvement of the technical solution of the present invention, in steps S4-S5, La1; Lb1; Lc1; ...; Lh1 are equal in size.

[0027] As a further improvement of the technical solution of the present invention, in step S8, after the adjustment component is installed, the cylindricity is corrected by adjusting the thickness of the adjustment block or the width of the gap.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The horizontal measuring device and correction method for the cylindricity of the hoop tooling proposed by the present invention, when measuring, first select a fixed ring with better cylindricity as a reference, and then measure the height L of the corresponding inner bosses in different quadrants on each fixed ring in turn through the measuring device, and then statistically calculate the height L of different inner bosses on each quadrant relative to the reference point as △Lmax and △Lmin, and determine the cylindricity of the squirrel cage hoop tooling. If there is a deviation in the cylindricity, it is corrected by adjusting the thickness of the adjustment block; this measuring method transfers the virtual hoop center to the physical platform, so that the size that cannot be measured intuitively is converted into a size that can be directly measured. The horizontal measuring device and correction method for the cylindricity of the hoop tooling have the characteristics of no need to convert the reference multiple times and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0031] Figure 1 It is a front view of a horizontal measuring device and correction method for the cylindricity of a hoop fixture;

[0032] Figure 2 It is a left view of the horizontal measuring device and correction method of the cylindricity of the hoop fixture;

[0033] Figure 3 It is the front view of the hoop tooling;

[0034] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0035] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0036] Reference numerals:

[0037] 1. Hoop tooling; 11. Toothed bar; 12. Fixed ring; 121. Inner boss; 2. Base; 3. Fixed wedge block; 31. First plane; 32. Second plane; 4. Adjustment assembly; 41. Fixed block; 42. Adjustment block; 43. Bolt; 5. Spiral tube assembly. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0039] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0040] Reference Figures 1 to 5 A horizontal measuring device and correction method for the cylindricality of a hoop tooling, comprising a base 2, a fixed wedge 3 and a measuring device

[0041] The hoop tooling 1 is used to install the spiral tube assembly 5. The hoop tooling 1 includes a plurality of toothed strips 11 and a plurality of fixed rings 12 installed on the outer surface of the spiral tube assembly 5. The inner side of the fixed ring 12 is provided with a plurality of equally divided inner bosses 121 abutting and cooperating with the toothed strips 11; it includes a base 2 for placing the hoop tooling 1, a plurality of fixed wedges 3 arranged on both sides of the hoop tooling 1 and a measuring device for measuring the distance between the center point of the inner boss 121 of the fixed ring 12 in a plumb state and the base 2. The fixed wedges 3 are placed on the base 2 for detachably fixing the hoop tooling 1; when measurement is required, the tooling is hoisted onto the base 2 by a crane. The base 2 can be a marble platform or an equivalent marking platform. The measuring device is a millimeter vernier caliper. The fixed wedges 3 are made of columnar wooden materials with a triangular cross-section. The wooden materials can effectively avoid damaging the outer surface of the hoop tooling 1.

[0042] Among them, when measuring, first select the fixed ring 12 with better cylindricity as the reference, and then measure the height L of the corresponding inner boss 121 in different quadrants on each fixed ring 12 in turn through the measuring device, and then statistically calculate the height L of different inner bosses 121 in each quadrant relative to the reference point as △Lmax and △Lmin, and determine the cylindricity of the squirrel cage hoop fixture 1. If there is a deviation in the cylindricity, it is corrected by adjusting the thickness of the adjustment block; this measurement method transfers the virtual hoop center to the physical platform, so that the size that cannot be measured intuitively is converted into a size that can be directly measured. The horizontal measurement and correction method of the cylindricity of the multi-layer squirrel cage hoop fixture 1 has the characteristics of no need to convert the reference multiple times and high efficiency. .

[0043] Specifically, the fixed wedge block 3 is provided with a first plane 31 and a second plane 32. The first plane 31 abuts against the upper surface of the base 2, and the second plane 32 abuts against the outer surface of the fixing ring 12. The first plane 31 and the second plane 32 form an acute angle, which facilitates the insertion of the fixed wedge block 3 into the bottom of the fixing ring 12.

[0044] The inner boss 121 is divided into 8 equal parts, and the center points of the inner boss 121 are marked as a, b, c, d, e, f, g, and h respectively.

[0045] Specifically, the hoop fixture 1 also includes a plurality of support plates, a plurality of fixing rings 12 are arranged at intervals along the axial direction of the spiral tube assembly 5, and the plurality of support plates are installed between two adjacent fixing rings 12, and the two ends of each support plate are respectively and detachably fixedly connected to two adjacent fixing rings 12.

[0046] More specifically, the hoop fixture 1 also includes a plurality of adjustment components 4 installed between the fixing ring 12 and the toothed bar 11; the adjustment component 4 includes a fixing block 41 connected to the fixing ring 12 and an adjustment block 42 connected to the toothed bar 11, the adjustment block 42 is horizontally embedded in the fixing block 41 and detachably fixedly connected by a bolt 43, the bolt 43 passes through the side of the fixing block 41 to press the adjustment block 42; one end of the fixing block 41 is for the fixing ring 12 to pass through and abuts against the inner circumference of the fixing ring 12, and the other end is for the adjustment block 42 to be embedded; one end of the adjustment block 42 is away from the fixing block 41 The toothed bar 11 is passed through and abuts against the outer peripheral surface of the toothed bar 11. There is also a gap of a certain width between the fixed block 41 and the adjusting block 42, and the adjusting block 42 has several different radial thicknesses. When the cylindricity needs to be corrected: the influence of the roundness deviation of the fixed ring 12 on the radial dimensional accuracy formed by the toothed bar 11 can be eliminated by adapting the adjusting blocks 42 with different radial thicknesses or adjusting the width of the gap. The fixing rings 12 can also be adapted to spiral tube assemblies 5 with different diameters by adapting the adjusting blocks 42 with different radial thicknesses or adjusting the width of the gap.

[0047] A horizontal measurement step and correction method for the cylindricity of a hoop tooling, applicable to the above-mentioned horizontal cylindricity measurement device of the hoop tooling 1, comprises the following steps:

[0048] S1. Before assembling the hoop fixture 1, select a fixing ring 12 with better cylindricity as the reference fixing ring 12 at the end of the hoop fixture 1 and mark the center point of the inner boss 121 by a machine tool;

[0049] S2, leveling the base 2 and using it as an external reference for subsequent cylindricity measurement;

[0050] S3, placing the assembled hoop tooling 1 on the base 2, and after the reference fixing ring 12 is in a plumb state, measuring the point dimensions of each inner boss 121 in turn and recording the data to ensure that the reference state of the fixing ring 12 is good;

[0051] S4, rotating the hoop fixture 1 until the center point a of the inner boss 121 of the reference fixing ring 12 is at the bottom, and then inserting the fixing wedge 3 from the side and bottom of the fixing ring 12 to fix it. At this time, point a and point e are in the plumb direction;

[0052] S5. Use a measuring device to measure the height L of the center point of the inner boss 121 of each fixing ring 12 in the same quadrant relative to the base 2 in turn, and record it as La1, La2, La3...LaN, and calculate the difference △La2, △La3...△LaN of each dimension relative to La1 and record the maximum and minimum values;

[0053] S6. Repeat steps S4-S5, rotate the hoop fixture 1 until the center points b, c, d, e, f, g, h are located at the bottom in sequence, and record them as Lb1, Lb2, Lb3...LbN; Lc1, Lc2, Lc3...LcN; ...; Lh1, Lh2, Lh3...LhN, and calculate the difference △Lb2, △Lb3...△LbN; △Lc2, △Lc3...△LcN; △Lh2, △Lh3...△LhN of each dimension relative to Lb1; Lc1; ...; Lh1, and record the maximum and minimum values;

[0054] S7, statistically calculating the height L of different inner bosses 121 on each quadrant relative to the reference point as △Lmax and △Lmin, and determining the cylindricity of the multi-layer squirrel cage hoop fixture 1;

[0055] S8. In order to ensure the cylindricity of the hoop fixture 1, after replacing the adjustment block 42 with different thicknesses according to the size of the difference, re-measure the height L of the replaced inner boss 121;

[0056] S9, repeat step S8 until all replacements are completed.

[0057] Specifically, within the allowable error range, in steps S4-S5, La1; Lb1; Lc1; ...; Lh1 are equal in size.

[0058] Specifically, in step S8, after installing the adjustment assembly 4, the cylindricity is corrected by adjusting the thickness of the adjustment block 42 or the width of the gap.

[0059] In one embodiment, when the height L of the inner boss 121 is less than the reference height, a thicker adjustment block 42 may be replaced or the width of the gap may be increased; when the height L of the inner boss 121 is greater than the reference height, a thinner adjustment block 42 may be replaced or the width of the gap may be reduced; when replacing the adjustment block, loosen the bolt 43, take out the original adjustment block 42, replace the appropriate adjustment block 42 according to the size of the difference, and tighten the bolt 43 to complete the replacement; when adjusting the width of the gap, loosen the bolt 43, move the adjustment block 42 forward or backward in the thickness direction according to the size of the difference, and tighten the bolt 43 to complete the adjustment.

[0060] According to the above operations, after the cylindricity measurement and installation of the adjustment block, a multi-point support structure with relatively good cylindricity can be formed on the inner side of the hoop fixture 1, thereby achieving effective support and precise positioning of the toothed bar 11, and assisting the toothed bar 11 in forming an envelope structure that achieves precise limitation of the cylindricity size of the spiral tube.

[0061] The other contents of the horizontal measuring device and correction method for the cylindricity of the hoop fixture described in the present invention can be found in the prior art and will not be described in detail here.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A horizontal measurement step and correction method for the cylindricity of a hoop tool, wherein the hoop tool is used to install a spiral tube assembly, and the hoop tool comprises a plurality of toothed strips and a plurality of fixing rings installed on the outer surface of the spiral tube assembly, wherein the inner side of the fixing ring is provided with a plurality of equally divided inner bosses abutting and cooperating with the toothed strips; characterized in that: It comprises a base for placing the hoop tooling, a plurality of fixed wedges arranged on both sides of the hoop tooling, and a measuring device for measuring the distance between the center point of the boss in the fixing ring and the base, wherein the fixed wedges are placed on the base for detachably fixing the hoop tooling; The following steps are involved: S1. Before assembling the hoop fixture, select the fixing ring with better cylindricity as the reference fixing ring at the end of the hoop fixture and mark the center point of the inner boss by a machine tool; S2, leveling the base; S3, placing the assembled hoop tooling on the base, measuring the point dimensions of each inner boss in turn and recording the data to ensure that the reference state of the fixing ring is good; S4, rotating the hoop fixture until the center point a of the inner boss of the reference fixing ring is at the bottom, and then fixing it with a fixing wedge; S5. Use a measuring device to measure the height L of the center point of the inner boss of each fixing ring in the same quadrant relative to the base in turn, and record it as La1, La2, La3...LaN, and calculate the difference △La2, △La3...△LaN of each dimension relative to La1 and record the maximum and minimum values; S6. Repeat steps S4-S5, rotate the hoop fixture until the center points b, c, d, e, f, g, h are located at the bottom in sequence, and record them as Lb1, Lb2, Lb3...LbN; Lc1, Lc2, Lc3...LcN; ...; Lh1, Lh2, Lh3...LhN, and calculate the difference △Lb2, △Lb3...△LbN; △Lc2, △Lc3...△LcN; △Lh2, △Lh3...△LhN of each dimension relative to Lb1; Lc1; ...; Lh1, and record the maximum and minimum values; S7. Statistically calculate the heights L of different inner bosses on each quadrant relative to the reference point as △Lmax and △Lmin, and determine the cylindricity of the squirrel cage hoop fixture; The reference values ​​△Lmax and △Lmin of the center point of the inner boss of the fixing ring relative to the center point of the inner boss of the reference fixing ring determine the cylindricity of the multi-layer squirrel cage hoop fixture; S8, installing an adjustment component according to the difference between the height L of the inner boss and the reference value, and re-measuring the height H of the replaced inner boss; S9, repeat step S8 until all replacements are completed.

2. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1 is characterized in that: The fixed wedge block is provided with a first plane and a second plane, the first plane is in abutment with the upper surface of the base, and the second plane is in abutment with the outer surface of the fixed ring.

3. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1 is characterized in that: The measuring device is a millimeter vernier caliper.

4. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1 is characterized in that: The inner boss is divided into 8 equal parts, and the center points of the inner boss are marked as a, b, c, d, e, f, g, and h respectively.

5. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1 is characterized in that: The hoop fixture also includes a plurality of adjustment components installed between the fixing ring and the toothed bar.

6. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 5 is characterized in that: The adjustment assembly includes a fixed block connected to the fixed ring and an adjustment block connected to the toothed bar. The adjustment block is horizontally embedded in the fixed block and is detachably fixedly connected by bolts. There is a gap between the adjustment block and the fixed block.

7. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 6 is characterized in that: The adjustment block has several different radial thicknesses.

8. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1 is characterized in that: In steps S4-S5, La1; Lb1; Lc1; ...; Lh1 are equal in size.

9. The horizontal measurement step and correction method of the cylindricity of the hoop fixture according to claim 1, characterized in that: In step S8, after the adjustment assembly is installed, the cylindricity is corrected by adjusting the thickness of the adjustment block or the width of the gap.

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