Turning process and detection method for special-shaped blade root groove of wheel disc

Abstract

The invention relates to a turning process and a detection method for a special-shaped blade root groove of a wheel disc. The turning process comprises the steps that S1, rough turning and finish turning are sequentially conducted on the outer circle of the wheel disc through a rhombic tool; s2, a straight groove and a bottom diameter are roughly turned from the outer circle of the wheel disc to the inner portion through cutting knives, and then the straight groove is subjected to semi-fine cutting and fine cutting through another two cutting knives; s3, rough machining is conducted on the half piece, the weight reduction groove and the working face from inside to outside through a cavity turning tool, then finish machining is conducted on the bottom diameter and the half piece, and semi-finish machining is conducted on the weight reduction groove and the working face while finish machining is conducted; s4, finish machining is conducted on the weight reduction groove and the working face through a cavity turning tool; and S5, a cutting knife is adopted for rough turning and finish turning in sequence to form small sections and gap filling grooves. The detection method comprises the steps of width detection of the straight flute and the bar, cavity detection of the half and symmetry detection of the blade root groove. By adopting the turning process and the detection method, the machining quality and the machining efficiency of the special-shaped blade root groove can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel disc processing, and in particular to a turning process for a wheel disc special-shaped blade root groove, and a subsequent detection method for the wheel disc special-shaped blade root groove. Background Art

[0002] With the continuous development and innovation of steam turbine technology, patent CN112797025B discloses a rotating device, on which the blade root groove adopts a special-shaped structure without an opening. However, since most of the wheel parts are broached on a broaching machine to complete the processing of the blade root groove, the blade root groove of the wheel parts is often arranged on the side, and since the rotor blade root groove processing clamping, measurement and other processing techniques or processing methods are relatively mature, circumferentially arranged blade root grooves often appear on rotor parts, and this kind of wheel turning circumferentially arranged blade root grooves is the first time.

[0003] Since this is the first time that this special blade root slot structure has appeared, and it is quite different from the T-shaped blade root slot structure on the conventional rotor, if the existing T-shaped blade root slot processing technology is used, the turning process is greatly limited by the position and requires additional cutting tests. It is not only difficult to ensure the processing quality of the special blade root slot, but also the processing efficiency is low. Therefore, it is necessary to design a turning process and detection method specifically for this special blade root slot to ensure batch processing and improve processing efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a turning process for a wheel disc special-shaped blade root groove which can improve the processing quality and processing efficiency.

[0005] The present invention adopts the following technical solution:

[0006] The present invention provides a turning process for a wheel disc special-shaped blade root groove, wherein the special-shaped blade root groove is an axisymmetric structure, and on one side of the axis of symmetry, the special-shaped blade root groove extends obliquely from the outer circle of the wheel disc to the inside to form a small section, and the end of the small section continues to extend a straight groove toward the inside of the wheel disc, and the end of the straight groove extends laterally to form a working surface, and the end of the working surface continues to extend a weight-reducing groove toward the inside of the wheel disc, and the end of the weight-reducing groove continues to extend a half-blade toward the inside of the wheel disc, and the end of the half-blade extends laterally to form a bottom diameter, and the bottom diameter is recessed to form a gap-filling groove, and the process comprises the following steps:

[0007] S1: Rough turning and fine turning are performed on the outer circle of the wheel disc in sequence using a diamond-shaped tool;

[0008] S2: First, a cutter is used to roughly turn the straight groove and the bottom diameter from the outer circle of the wheel to the inside in a layered cutting manner, and then two other cutters are used to semi-finely cut and finely cut the straight groove in an offset state;

[0009] S3: Use the cavity turning tool to rough-machine the half-blade, weight-reducing groove and working surface from the inside to the outside, then finish-machine the bottom diameter and half-blade, and semi-finish the weight-reducing groove and working surface at the same time;

[0010] S4: Use cavity turning tools to finish the weight-reducing grooves and working surfaces;

[0011] S5: Use a cutting knife to perform rough turning and fine turning in sequence to produce small sections and filling grooves.

[0012] Preferably, in step S1, a 0.8-1mm margin is retained after rough turning of the outer circle of the wheel disc, and the fine turning of the outer circle of the wheel disc is performed three times, the cutting depth of the first outer circle fine turning is 0.4-0.5mm, the cutting depth of the second outer circle fine turning is 0.20-0.25mm, and after the third outer circle fine turning, the outer circle of the wheel disc reaches the size required in the process step diagram.

[0013] Preferably, in step S2, the straight groove and the bottom diameter both retain a 2-3mm margin after rough turning; and the margin of the straight groove after semi-finishing cutting is 0.10-0.15mm, and then the straight groove is made to reach the required size in the process step diagram through fine cutting.

[0014] Preferably, in step S3, the half-piece, the lightening groove and the working surface are first rough-machined at a feed speed of 0.08mm / min-0.2mm / min, and a 0.8-1mm margin is retained after the rough machining is completed; then the bottom diameter and the half-piece are fine-machined, and the fine-machining of the half-piece is carried out three times, and the cutting depth of the first fine-machining of the half-piece is 0.4-0.5mm, the cutting depth of the second fine-machining of the half-piece is 0.2-0.25mm, and the third fine-machining of the half-piece is adjusted to the size required in the process step diagram; and when the third fine-machining of the half-piece is completed and the cavity turning tool is moved to the position of the lightening groove, the feed speed is changed to 0.12mm / min-0.2mm / min, and then the lightening groove and the working surface are semi-finished, and the lightening groove and the working surface both retain a 0.2-0.3mm margin after the semi-finishing is completed.

[0015] Preferably, in step S4, the finishing of the working surface is performed twice, the cutting depth of the two finishing of the working surface is 0.10-0.15 mm, and the weight reduction groove is processed together during the second finishing of the working surface.

[0016] Preferably, in step S5, when the section is rough-turned using a cutting knife, a transition chamfer is also machined between the section and the straight groove. The finishing of the section is performed twice, and the cutting depth of each finishing of the section is 0.4-0.5 mm.

[0017] The present invention also provides a method for detecting the wheel disc's special-shaped blade root groove, including width detection of the straight groove and the subsection, cavity detection of the half-flange, and symmetry detection of the blade root groove. When the turning process of the wheel disc's special-shaped blade root groove reaches the processing of the half-flange, the cavity detection of the half-flange is performed; after the turning process of the wheel disc's special-shaped blade root groove completes the processing of the wheel disc's special-shaped blade root groove, the width detection of the straight groove and the subsection and the symmetry detection of the blade root groove are performed.

[0018] Preferably, the width detection of the straight groove and the small section is completed by a pass-stop clamp.

[0019] Preferably, the cavity inspection of the half-blade is completed by an inside diameter micrometer.

[0020] Preferably, the symmetry detection of the blade root groove is completed by using a profile symmetry inspection sample and a feeler gauge.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The turning process of the wheel disc special-shaped blade root groove of the present invention can utilize a variety of cutting tools including diamond cutters, cutting knives, and cavity turning tools to perform processing of the special-shaped blade root groove on a special wheel disc front turning machine. Without excessively increasing the equipment cost, the processing of the special-shaped blade root groove on the wheel disc is achieved through the specific process sequence of S1-S5, thereby reducing the cost, and the processing quality and processing efficiency can also be effectively improved.

[0023] The detection method of the wheel disc special-shaped blade root groove of the present invention can perform standardized and effective detection on the processing dimensions of the special-shaped blade root groove after the special-shaped blade root groove is half-turned and completed as a whole through the above-mentioned process, so as to ensure the processing quality of the special-shaped blade root groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 1 is a schematic diagram of the structure of the special-shaped blade root groove after processing in an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the state of machining the outer circle of a wheel disc by using a turning process of a wheel disc's special-shaped blade root groove in an embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the state of rough turning the straight groove and the bottom diameter by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the state of semi-finishing and finishing cutting of the straight groove by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0028] Figure 5It is a schematic diagram of the state of rough machining the half blade, the lightening groove and the working surface by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the state of fine machining the bottom diameter and the half blade by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0030] Figure 7 It is a schematic diagram of the state of fine machining the weight-reducing groove and the working surface by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram of the state of sequentially performing rough turning and fine turning of the subsection and the filling groove by using the turning process of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0032] Fig. 9 It is a schematic diagram of the shape of the pass-stop clamping plate used when the width of the straight groove and the subsection is detected by adopting the detection method of the wheel disc special-shaped blade root groove in the embodiment of the present invention.

[0033] Fig.10 1 is a schematic diagram of the state when the half-blade cavity detection is performed using the detection method of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0034] Fig.11 1 is a schematic diagram of the state when the symmetry of the blade root groove is detected by using the detection method of the wheel disc special-shaped blade root groove in an embodiment of the present invention.

[0035] The reference numerals are described as follows:

[0036] 1. Section 8. Pass and stop board

[0037] 2. Straight slot 801, through end

[0038] 3. Working surface 802, stop end

[0039] 4. Weight reduction groove 9. Inside diameter micrometer

[0040] 5. Half 10. Line symmetry test sample

[0041] 6. Bottom diameter 11. Outer diameter

[0042] 7. Filling groove A, axial reference surface DETAILED DESCRIPTION

[0043] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0047] This embodiment provides a turning process for the wheel disc special-shaped blade root groove, see Figure 1 The special-shaped blade root groove is an axisymmetric structure. On one side of the symmetry axis, the special-shaped blade root groove extends obliquely from the outer circle 11 of the wheel disc to the inside to form a section 1. The end of the section 1 continues to extend a straight groove 2 toward the inside of the wheel disc. The end of the straight groove 2 extends transversely to form a working surface 3. The end of the working surface 3 continues to extend a weight-reducing groove 4 toward the inside of the wheel disc. The end of the weight-reducing groove 4 continues to extend a half-blade 5 toward the inside of the wheel disc. The end of the half-blade 5 extends transversely to form a bottom diameter 6. The bottom diameter 6 is recessed to form a gap-filling groove 7, and the following steps are included, see Figures 2 to 8 :

[0048] S1: Rough turning and fine turning are performed on the outer circle 11 of the wheel disc in sequence using a diamond-shaped tool;

[0049] S2: First, a cutter is used to roughly turn the straight groove 2 and the bottom diameter 6 from the outer circle 11 of the wheel disc to the inside in a layered cutting manner, and then two other cutters are used to perform semi-finishing and finishing cutting on the straight groove 2 in an offset state;

[0050] S3: Use the cavity turning tool to perform rough machining on the half piece 5, the lightening groove 4 and the working surface 3 from the inside to the outside, and then perform fine machining on the bottom diameter 6 and the half piece 5, and perform semi-fine machining on the lightening groove 4 and the working surface 3 during fine machining;

[0051] S4: Use the cavity turning tool to finish the weight reduction groove 4 and the working surface 3;

[0052] S5: Use a cutting tool to perform rough turning and fine turning in sequence to form a section 1 and a filling groove 7.

[0053] The turning process of the wheel disc's special-shaped blade root grooves in this embodiment can utilize a variety of cutting tools, including diamond cutters, cutting knives, and cavity turning tools, to perform processing of the special-shaped blade root grooves on a special wheel disc front turning machine. Without excessively increasing equipment costs, the processing of the special-shaped blade root grooves on the wheel disc is achieved through the specific process sequence of S1-S5, thereby reducing costs, and both processing quality and processing efficiency can be effectively improved.

[0054] It should be noted that see Figure 1 Section 1 is a straight line shape that determines the position and geometric elements of the tenon or tenon groove; the straight groove 2 is a straight line shape that matches the root of the blade; the working surface 3 is the load-bearing surface of the tenon or tenon groove in the blade root groove when working; the weight-reducing groove 4 is an arc groove used to reduce the weight of the structure and improve the mechanical efficiency; the half blade 5 is a straight line shape that helps the blade and the wheel to fit tightly; the filling groove 7 is a receiving groove for placing the filling strip to ensure that the blade is correctly installed in the blade root groove and can withstand the working load.

[0055] Preferably, in step S1, a 0.8-1mm margin is retained after rough turning of the outer circle 11 of the wheel disc, and the fine turning of the outer circle of the wheel disc is performed three times, the cutting depth of the first outer circle fine turning is 0.4-0.5mm, and the cutting depth of the second outer circle fine turning is 0.20-0.25mm. After the third outer circle fine turning, the outer circle of the wheel disc reaches the size required in the process step diagram, thereby completing the turning of the outer circle of the wheel disc by a special tool and under standardized cutting parameters.

[0056] It should be noted that the actual size of the outer circle of the wheel disc after processing is rounded up to an integer.

[0057] Preferably, in step S2, see Figure 3 First, a cutter with a width of 15.875 mm is used to cut the straight groove 2 and the bottom diameter 6 in layers, and the straight groove 2 and the bottom diameter 6 are both left with a 2-3 mm margin after the rough turning is completed; see Figure 4 , and then use two cutting knives with a width of 8mm to perform semi-fine cutting and fine cutting on the straight groove 2 in an offset state, and the margin of the straight groove 2 after semi-fine cutting is 0.10-0.15mm, and then fine cutting is used to make the straight groove 2 reach the required size in the process step diagram.

[0058] Preferably, in step S3, the cavity turning tool performs turning in a rotor reverse manner, see Figure 5First, the half piece 5, the weight-reducing groove 4 and the working surface 3 are rough-machined at a feed rate of 0.08mm / min-0.2mm / min and a 0.8-1mm margin is reserved after the rough machining is completed; see Figure 6 , and then the bottom diameter 6 and the half piece 5 are finished. The finishing of the half piece 5 is carried out in three times, and the cutting depth of the first half piece finishing is 0.4-0.5mm, the cutting depth of the second half piece finishing is 0.2-0.25mm, and the third half piece finishing adjusts the half piece 5 to the size required in the process step diagram; and when the third half piece finishing is completed and the cavity turning tool moves to the position of the weight reduction groove 4, the feed speed is changed to 0.12mm / min-0.2mm / min and then the weight reduction groove 4 and the working surface 3 are semi-finished, and the weight reduction groove 4 and the working surface 3 retain a 0.2-0.3mm margin after the semi-finishing is completed.

[0059] Preferably, in step S4, see Figure 7 The finishing of the working surface 3 is carried out twice, and the cutting depth of the two working surface finishing is 0.10-0.15mm. In the second working surface finishing, the weight reduction groove 4 is processed together to avoid the appearance of burrs in the cavity and ensure the processing quality.

[0060] Preferably, in step S5, see Figure 8 When using a cutting tool to perform rough turning on section 1, a transition chamfer is also machined between section 1 and straight groove 2. The finishing of section 1 is performed twice, and the cutting depth of each finishing of the section is 0.4-0.5mm.

[0061] The present embodiment also provides a method for detecting the wheel disc's special-shaped blade root groove, including width detection of the straight groove and the subsection, cavity detection of the half-flange, and symmetry detection of the blade root groove. When the turning process of the wheel disc's special-shaped blade root groove reaches the processing of the half-flange 5, the cavity detection of the half-flange is performed; after the turning process of the wheel disc's special-shaped blade root groove completes the processing of the wheel disc's special-shaped blade root groove, the width detection of the straight groove and the subsection and the symmetry detection of the blade root groove are performed.

[0062] The detection method of the wheel disc special-shaped blade root groove of this embodiment can perform standardized and effective detection on the processing dimensions of the special-shaped blade root groove after the special-shaped blade root groove is half-turned and completed as a whole through the above-mentioned process, so as to ensure the processing quality of the special-shaped blade root groove.

[0063] Preferably, the width detection of the straight groove 2 and the section 1 is completed by the pass-stop card 8. Fig. 9 If the through end 801 of the through-stop clamp 8 can pass through the straight groove 2 or the subsection 1, and the stop end 802 of the through-stop clamp 8 cannot pass through the straight groove 2 or the subsection 1, it means that the width dimension of the straight groove 2 or the subsection 1 is qualified.

[0064] Preferably, the cavity detection of the half-blade is completed by an internal diameter micrometer 9. Fig.10 , take the side surface of the straight groove 2 on one side as the axial reference plane A, use the inside micrometer 9 to measure the straight-line distance between the half piece 5 and the axial reference plane A, and then compare this measured data with the dimensional data in the process step diagram to obtain the tool offset when processing the half piece 5, and then continue to process the half piece 5 according to the tool offset, so that the cavity size of the half piece 5 can be qualified.

[0065] Preferably, the symmetry of the blade root groove is detected by using a profile symmetry test sample 10 in combination with a feeler gauge (not shown in the figure). Fig.11 First, use the line symmetry inspection template 10 to press against the working surface 3 on one side and make the bent section of the line symmetry inspection template 10 fit with the straight groove 2 on this side, then insert the feeler gauge into the gap between the line symmetry inspection template 10 and the straight groove 2 and completely block the gap, after recording the gap size measured by the feeler gauge, press the line symmetry inspection template 10 against the working surface 3 on the other side and make the bent section of the line symmetry inspection template 10 fit with the straight groove 2 on this side, then insert the feeler gauge into the gap between the line symmetry inspection template 10 and the straight groove 2 and completely block the gap, record the gap size measured by the feeler gauge again, and by comparing the two recorded gap sizes, it can be determined whether the symmetry of the blade root groove is qualified.

[0066] The present invention can complete the processing of the special-shaped blade root groove through the solidified step sequence and cutting parameters in the above-mentioned turning process, and then complete the size detection of the special-shaped blade root groove in combination with the above-mentioned standardized detection method, thereby ensuring the processing efficiency and processing quality of the special-shaped blade root groove. In addition, the processing machine tools and detection tools are relatively common, and the actual application is convenient and efficient.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A turning process for a wheel disc with a special-shaped blade root groove, characterized in that: The special-shaped blade root groove is an axisymmetric structure. On one side of the symmetry axis, the special-shaped blade root groove extends obliquely from the outer circle (11) of the wheel disc to the inside to form a small section (1). The end of the small section (1) continues to extend a straight groove (2) toward the inside of the wheel disc. The end of the straight groove (2) extends transversely to form a working surface (3). The end of the working surface (3) continues to extend into the inside of the wheel disc to form a weight-reducing groove (4). The end of the weight-reducing groove (4) continues to extend into the inside of the wheel disc to form a half-blade (5). The end of the half-blade (5) extends transversely to form a bottom diameter (6). The bottom diameter (6) is recessed to form a gap-filling groove (7). The method comprises the following steps: S1: using a diamond-shaped tool to sequentially perform rough turning and fine turning on the outer circle (11) of the wheel disc; S2: firstly, using a cutting knife to roughly turn the straight groove (2) and the bottom diameter (6) from the outer circle (11) of the wheel disc toward the inside in a layered cutting manner, and then using two other cutting knives to semi-finely cut and finely cut the straight groove (2) in an offset state; S3: using a cavity turning tool to firstly perform rough machining on the half-blade (5), the weight-reducing groove (4) and the working surface (3) from the inside to the outside, and then perform fine machining on the bottom diameter (6) and the half-blade (5), and at the same time perform semi-fine machining on the weight-reducing groove (4) and the working surface (3); S4: using a cavity turning tool to perform fine machining on the weight-reducing groove (4) and the working surface (3); S5: using a cutting tool to sequentially rough-turn and fine-turn the subsection (1) and the filling groove (7).

2. The turning process of the wheel disc special-shaped blade root groove according to claim 1 is characterized in that: In step S1, the outer circle (11) of the wheel disc is rough turned with a 0.8-1mm margin, and the outer circle of the wheel disc is fine turned three times, the first outer circle fine turning has a cutting depth of 0.4-0.5mm, the second outer circle fine turning has a cutting depth of 0.20-0.25mm, and after the third outer circle fine turning, the outer circle of the wheel disc reaches the size required in the process step diagram.

3. The turning process of the wheel disc special-shaped blade root groove according to claim 1 is characterized in that: In step S2, the straight groove (2) and the bottom diameter (6) both retain a margin of 2-3 mm after rough turning; and the margin of the straight groove (2) after semi-finishing cutting is 0.10-0.15 mm, and then the straight groove (2) is made to reach the size required in the process step diagram through fine cutting.

4. The turning process of the wheel disc special-shaped blade root groove according to claim 1 is characterized in that: In step S3, the half-blade (5), the weight-reducing groove (4) and the working surface (3) are firstly rough-machined at a feed rate of 0.08 mm / min-0.2 mm / min, and a margin of 0.8-1 mm is retained after the rough-machined process is completed; then, the bottom diameter (6) and the half-blade (5) are fine-machined, and the fine-machined process of the half-blade (5) is performed three times, and the cutting depth of the first fine-machined process of the half-blade is 0.4-0.5 mm, and the cutting depth of the second fine-machined process of the half-blade is 0.2-0. .25mm, and the third half-slice finishing is to adjust the half-slice (5) to the size required in the process step diagram; and when the third half-slice finishing is completed and the cavity turning tool moves to the position of the weight-reducing groove (4), the feed speed is changed to 0.12mm / min-0.2mm / min and then the weight-reducing groove (4) and the working surface (3) are semi-finished, and the weight-reducing groove (4) and the working surface (3) both retain a margin of 0.2-0.3mm after the semi-finishing is completed.

5. The turning process of the wheel disc special-shaped blade root groove according to claim 4 is characterized in that: In step S4, the finishing of the working surface (3) is performed twice, the cutting depth of the two working surface finishing is 0.10-0.15 mm, and the weight reduction groove (4) is processed together during the second working surface finishing.

6. The turning process of the wheel disc special-shaped blade root groove according to claim 1, characterized in that: In step S5, when the section (1) is roughly turned using a cutting tool, a transition chamfer is also machined between the section (1) and the straight groove (2). The finishing of the section (1) is performed twice, and the cutting depth of each finishing of the section is 0.4-0.5 mm.

7. A method for detecting irregular blade root grooves of a wheel disk, characterized in that: It includes the detection of the width of the straight groove and the small section, the cavity detection of the half-flange and the symmetry detection of the blade root groove. When the turning process of the wheel disc special-shaped blade root groove described in any one of claims 1 to 6 is carried out to the processing of the half-flange (5), the cavity detection of the half-flange is carried out; after the turning process of the wheel disc special-shaped blade root groove described in any one of claims 1 to 6 completes the processing of the wheel disc special-shaped blade root groove, the width detection of the straight groove and the small section and the symmetry detection of the blade root groove are carried out.

8. The method for detecting the irregular blade root groove of a wheel according to claim 7, characterized in that: The width detection of the straight groove (2) and the subsection (1) is completed by the pass-stop clamping plate (8).

9. The method for detecting the irregular blade root groove of a wheel according to claim 7, characterized in that: The cavity inspection of the half-blade is completed by the internal diameter micrometer (9).

10. The method for detecting the irregular blade root groove of a wheel according to claim 7, characterized in that: The symmetry test of the blade root groove is completed by using a profile symmetry test sample (10) in combination with a feeler gauge.

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