A screw-in thin bottom blade and its processing method

Abstract

The present application provides a screw-in thin bottom blade and a processing method thereof, comprising a target thin seat, a target blade body, a target stop, a target center plane processing line and a target surface small plane processing line; the target blade body is arranged on the target thin seat, the target thin seat is a semicircular structure, a target stop is provided on the outer circumference of the target thin seat, two target thin seats can be surrounded by a circular ring structure through the target center plane processing line, a target surface small plane processing line is provided on the target thin seat, the target surface small plane processing line is arranged parallel to the target center plane processing line, and the target thin seat can be screwed into the blade disk through the target stop. The present invention improves its production efficiency by designing the target thin seat and the target blade body to be detachably mounted on the blade disk, so that they can be processed separately and then assembled, and at the same time, damaged parts can be replaced as needed during use, reducing the waste of resources caused by replacing the entire part and saving costs.

Description

Technical Field

[0001] The present application belongs to the technical field of compressors, and in particular relates to a screw-in thin bottom blade and a processing method thereof. Background Art

[0002] The partition is one of the commonly used parts in centrifugal compressors. Together with the impeller, it constitutes the flow path of the centrifugal compressor and plays a vital role in the successful operation of the compressor. In the conventional structure, the blades and the blade disk are generally integrated into one structure, that is, the blades are milled out on the partition. This leads to the need to replace the blade as a whole when it is damaged during use, which wastes resources and is costly. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In order to solve the above problems, the first aspect of the present application provides a screw-in thin bottom blade, including a target thin seat, a target blade body, a target stop, a target center plane processing line and a target surface small plane processing line;

[0005] The target blade body is arranged on the target thin seat, and the target thin seat is a semicircular structure. A target stop is provided on the outer circumference of the target thin seat. The two target thin seats can form a circular structure through the target center-dividing surface processing line. A target surface-dividing surface processing line is provided on the target thin seat. The target surface-dividing surface processing line is arranged parallel to the target center-dividing surface processing line. The target thin seat can be screwed into the blade disk through the target stop.

[0006] In a second aspect, a method for processing a screw-in thin bottom blade is also provided, which is applied to processing the screw-in thin bottom blade as described above, and comprises the following steps:

[0007] Step 1: Cutting to obtain the blanks of upper and lower semicircular structures;

[0008] Step 2: Mark the upper and lower initial half-center dividing surface processing lines and the initial surface small surface processing lines on the blank, and mill it according to the upper and lower initial half-center dividing surface processing lines and the initial surface small surface processing lines;

[0009] Step 3: Design a process diagram based on the finished part structure design drawing, and perform rough turning on the milled blank according to the process diagram to form a semi-finished part with an initial blade body, an initial thin seat, and an initial stop.

[0010] Step 4: rough milling the initial blade body in the semi-finished product;

[0011] Step 5: performing stress relief heat treatment on the semi-finished product after rough milling the initial blade body;

[0012] Step 6: Fine milling the upper and lower initial center dividing surfaces and initial surface finishing facets of the semi-finished product after heat treatment to obtain target center dividing surface processing lines and target surface finishing facet processing lines;

[0013] Step 7: Clamp the outer circumference of the initial thin seat of the semi-finished part and turn its bottom surface;

[0014] Step eight, clamping the initial thin seat after turning, and fine milling the initial blade body after rough milling to obtain the target blade body;

[0015] Step nine: Clamp the initial thin seat after turning, turn its bottom surface to meet the requirements of the finished part structure design drawing to obtain the target thin seat, and then process the initial stop, inner hole, outer circle and other dimensions to meet the requirements of the finished part structure design drawing to obtain the target stop and finished part;

[0016] Step 10: Grind the finished parts.

[0017] Optionally, the initial stop is thickened according to a process diagram designed based on the finished part structural design drawing.

[0018] Optionally, the initial blade body in the semi-finished part is rough-milled by leaving 3 mm on one side according to the finished part structure design drawing.

[0019] Optionally, the bottom surface of the initial thin seat is turned with a 1 mm margin according to the finished part structural design drawing.

[0020] Optionally, a pressure guide plate is used for card installation.

[0021] Optionally, the size of the initial stop is processed according to the lower limit of the size of the finished part structure design drawing to obtain the target stop.

[0022] Beneficial effects

[0023] A screw-in thin-bottom blade and a processing method thereof provided in an embodiment of the present invention can be processed separately and then assembled by designing the target thin seat and the target blade body to be detachably mounted on the blade disk, thereby improving its production efficiency. At the same time, damaged parts can be replaced as needed during use, reducing the waste of resources caused by replacing the entire part and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional structural diagram of a blade according to an embodiment of the present application;

[0025] Figure 2 This is a top view of the blade structure of an embodiment of the present application;

[0026] Figure 3 For an embodiment of this application Figure 2A partial enlarged structural diagram in the middle;

[0027] Figure 4 This is a structural diagram of the blade after installation according to an embodiment of the present application;

[0028] Figure 5 This is a simplified process diagram of another embodiment of the present application;

[0029] Figure 6 This is a flow chart of another embodiment of the present application.

[0030] The reference numerals indicate:

[0031] 1. Target thin seat; 2. Target blade body; 3. Target stop; 4. Target center plane processing line; 5. Target surface processing line. DETAILED DESCRIPTION

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] See also Figure 1-5 As shown, the first aspect of this embodiment provides a screw-in thin bottom blade, including a target thin seat 1, a target blade body 2, a target stop 3, a target center surface processing line 4 and a target surface small plane processing line 5; the target blade body 2 is arranged on the target thin seat 1, and the target thin seat 1 is a semicircular structure. A target stop 3 is provided on the outer circumference of the target thin seat 1, and the two target thin seats 1 can be surrounded by a circular structure through the target center surface processing line 4. A target surface small plane processing line 5 is provided on the target thin seat 1, and the target surface small plane processing line 5 is arranged parallel to the target center surface processing line 4. The target thin seat 1 can be screwed into the blade disk through the target stop 3.

[0037] Specifically, the target thin seat 1 is a semicircular structure, and the target blade body 2 is arranged on the target thin seat 1. When the target thin seat 1 is fitted through the target center dividing surface processing line 4, a ring structure can be formed between the two target thin seats 1. The target thin seat 1 can be screwed into the blade disk through the target stop 3, so that the target thin seat 1 and the target blade body 2 can be detachably installed with the blade disk, and can be processed separately and then assembled to improve its production efficiency. At the same time, when a part of it is damaged during use, only the damaged part can be replaced, reducing the waste of resources caused by replacing the entire part and saving costs.

[0038] See also Figure 1-6 Another aspect of the present embodiment provides a method for processing a screw-in thin bottom blade, which is applied to processing the aforementioned screw-in thin bottom blade, and includes the following steps:

[0039] Step 1: Cutting the material to obtain the upper and lower semicircular blanks; in this process, the upper and lower semicircular blanks are formed by numbering, cutting and cutting the upper and lower semicircular materials;

[0040] Step 2: Mark the upper and lower initial half-center dividing surface processing lines and the initial surface processing lines on the blank, and mill it according to the upper and lower initial half-center dividing surface processing lines and the initial surface processing lines; by marking the upper and lower initial half-center dividing surface processing lines and the initial surface processing lines on the blank, the blank will be milled according to the marked lines, the allowances in the upper and lower semicircular blanks will be eliminated, and the upper and lower semicircular blanks will be made completely symmetrical by the initial surface processing lines, which is convenient for subsequent processing and improves the processing accuracy;

[0041] Step 3: Design a process diagram based on the finished part structure design drawing, and perform rough turning on the milled blank according to the process diagram to form a semi-finished part with an initial blade body, an initial thin seat and an initial stop; the process diagram is as follows: Figure 5As shown, the interior is the outline of the finished part, and the exterior is the process diagram. By designing the process diagram based on the finished part's structural design drawings, and then rough turning it according to the process diagram, the milled blank is further processed to form a semi-finished part with an initial blade body, an initial thin seat, and an initial stop. At the same time, margins are left in each part to reduce the probability of deformation during subsequent processing. The process diagram designed according to the finished part's structural design drawings thickens the initial stop, improves its strength, facilitates subsequent clamping, realizes further processing, and also reduces the probability of deformation during subsequent processing.

[0042] Step 4: Rough milling the initial blade in the semi-finished part; rough milling is performed on the initial blade in the semi-finished part according to the finished part structural design drawing, leaving 3mm on one side, to achieve further processing of the initial blade, gradually approaching the size of the finished part structural design drawing;

[0043] Step 5: Perform stress relief heat treatment on the semi-finished part after rough milling the initial blade body. By performing stress relief heat treatment on the rough milled initial blade body, the strength of the semi-finished part is improved and its good plasticity and toughness are maintained, the deformation generated during subsequent processing is reduced, and the accuracy of the dimensions of each part of the finished part after processing is improved.

[0044] Step 6: Fine milling is performed on the upper and lower initial center dividing surfaces and the initial surface-punching small planes of the semi-finished part after heat treatment to obtain the target center dividing surface processing line 4 and the target surface-punching small plane processing line 5; by fine milling the upper and lower initial center dividing surfaces and the initial surface-punching small planes, the target center dividing surface processing line 4 and the target surface-punching small plane processing line 5 are regained, which can be used as a reference for more accurate alignment of the upper and lower blade semicircles in subsequent processing, thereby improving the accuracy of subsequent processing of the finished part;

[0045] Step seven: clamp the outer circumference of the initial thin seat of the semi-finished part and lathe its bottom surface. Since the outer circumference of the initial thin seat has an allowance, the outer circumference of the initial thin seat can be clamped, and then the bottom surface can be lathe. A 1mm allowance is left on the bottom surface during lathe turning to avoid deformation caused by the initial thin seat being too thin after lathing during subsequent processing of the initial blade body. It can also be used to machine a fine milling reference surface with an allowance before fine milling of the initial blade body.

[0046] Step eight, clamping the initial thin seat after turning, and fine milling the initial blade body after rough milling to obtain the target blade body 2; in this process, the initial thin seat after turning is clamped by the pressure guide plate, which reduces the probability of deformation caused by other forms of clamping for the initial thin seat, and can also achieve the fixation of the initial thin seat after turning, and fine milling the initial blade body to obtain the target blade body 2;

[0047] Step nine, the initial thin seat after turning is clamped, and its bottom surface is turned to meet the requirements of the finished part structural design drawing to obtain the target thin seat 1, and then the initial stop, inner hole, outer circle and the dimensions of each part are processed to meet the requirements of the finished part structural design drawing to obtain the target stop 3 and the finished part; after the initial blade body is fine-milled to the target blade body 2 that meets the finished part structural design drawing, the margin of the turned thin seat bottom surface is fine-turned to meet the requirements of the finished part structural design drawing to obtain the target thin seat 1. This process can effectively control the deformation problem caused by fine milling of the blade, and then the bottom surface of the target thin seat 1 is used as the reference plane, and it is placed on four high shims, and the target thin seat 1 is fixed by the pressure guide plate. The initial stop, inner hole, outer support and the dimensions of the remaining parts are processed to meet the requirements of the finished part structural design drawing. The pressure guide plate replaces the traditional clamping claw to fix the target thin seat 1, thereby reducing the local pressure on the blade structure during processing, and the pressure is more even, reducing the deformation probability of the finished part after processing, and improving the accuracy of the dimensions of each part of the finished part after processing. When machining the initial stop to the target stop 3, the size of the initial stop is machined according to the lower limit of the size of the finished part structure design drawing. This can minimize the potential deformation of the target stop 3 after machining, greatly improving the chances of successful installation of the finished part and the blisk.

[0048] Step 10: Grind the finished part. Grinding the finished part can reduce milling marks and burrs, improve the processing accuracy of the finished part, and also improve its aesthetics.

[0049] By manufacturing the screw-in thin-bottom blades, the assembly and disassembly connection between the blades and the blade disc can be realized, and they can be mass-produced separately and then assembled. Compared with the existing technology in which the blades and the blade disc are an integrated structure, the production efficiency is higher, and when the blades are damaged, there is no need to replace them together with the blade disc. Only the damaged parts need to be replaced, which reduces the maintenance cost; it can reduce the deformation problem during the processing of the screw-in thin-bottom blades, greatly improve the probability of successful installation of the screw-in thin-bottom blades and the blade disc, and provide a reference method for the processing of similar screw-in thin-bottom blade structures.

[0050] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0051] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A method for processing a screw-in thin-bottom blade, wherein the method is applied to a screw-in thin-bottom blade, and is characterized in that: The screw-in thin bottom blade comprises a target thin seat (1), a target blade body (2), a target stop (3), a target center plane processing line (4) and a target surface small plane processing line (5); The target blade body (2) is arranged on the target thin seat (1), the target thin seat (1) is a semicircular structure, a target stop (3) is provided on the outer circumference of the target thin seat (1), two target thin seats (1) can be surrounded by a circular ring structure through a target mid-plane processing line (4), a target surface small plane processing line (5) is provided on the target thin seat (1), the target surface small plane processing line (5) is arranged parallel to the target mid-plane processing line (4), and the target thin seat (1) can be screwed into the blade disk through the target stop (3); The processing method of the screw-in thin bottom blade comprises the following steps: Step 1: Cutting to obtain the blanks of upper and lower semicircular structures; Step 2: Mark the upper and lower initial half-center dividing surface processing lines and the initial surface small surface processing lines on the blank, and mill it according to the upper and lower initial half-center dividing surface processing lines and the initial surface small surface processing lines; Step 3: Design a process diagram based on the finished part structure design drawing, and perform rough turning on the milled blank according to the process diagram to form a semi-finished part with an initial blade body, an initial thin seat, and an initial stop. Step 4: rough milling the initial blade body in the semi-finished product; Step 5: performing stress relief heat treatment on the semi-finished product after rough milling the initial blade body; Step 6: Perform precision milling on the upper and lower initial center dividing surfaces and the initial surface-drilling small surface of the semi-finished product after heat treatment to obtain the target center dividing surface processing line (4) and the target surface-drilling small surface processing line (5); Step 7: Clamp the outer circumference of the initial thin seat of the semi-finished part and turn its bottom surface; Step eight, clamping the initial thin seat after turning, and fine milling the initial blade body after rough milling to obtain the target blade body (2); Step nine, clamping the initial thin seat after turning, turning its bottom surface to achieve the requirements of the finished part structure design drawing to obtain the target thin seat (1), and then processing the initial stop, inner hole, outer circle and the dimensions of each part to achieve the requirements of the finished part structure design drawing, to obtain the target stop (3) and the finished part; Step 10: Grind the finished parts.

2. The method for processing a screw-in thin bottom blade according to claim 1, characterized in that: In step three, the initial stop is thickened according to the process diagram designed based on the finished part structural design drawing.

3. The method for processing a screw-in thin bottom blade according to claim 2, characterized in that: In step 4, the initial blade body in the semi-finished part is rough-milled with 3mm left on one side according to the finished part structural design drawing.

4. The method for processing a screw-in thin bottom blade according to claim 3, characterized in that: In step seven, the bottom surface of the initial thin seat is turned according to the finished part structure design drawing with a 1mm margin.

5. The method for processing a screw-in thin bottom blade according to claim 4, characterized in that: In step eight, the card is installed using a pressure guide plate.

6. The method for processing a screw-in thin bottom blade according to claim 1, characterized in that: In step nine, the size of the initial stop is processed according to the lower limit of the size of the finished part structure design drawing to obtain the target stop (3).

Images