A processing and testing method for a supercharger pressure end sealing cover

Abstract

The present invention relates to the technical field of superchargers, and in particular to a method for processing and detecting a sealing cover at a pressure end of a supercharger. The method for processing the sealing cover at the pressure end of a supercharger mainly comprises: rough turning a large end, rough turning a small end, semi-finishing turning a large end face and an inner hole, fine turning front and rear end faces, an outer circle, an end face sealing ring groove, fine turning a small end oil ring groove, fine turning an inner hole, milling a small end oil ring groove notch to the required size according to a drawing, and performing numerical milling and clamping processes. The present invention effectively controls deformation during the clamping and machining of parts, and completes the clamping and machining of high-precision positioning and matching surfaces of parts in one process, thereby avoiding repeated clamping, positioning, and correction errors, and well ensuring the dimensional accuracy and form and position accuracy requirements of the parts. The difficulty of clamping and correcting parts is reduced, and the clamping and correction of parts is convenient, fast, and efficient. Parts are clamped in a natural state, and internal stress deformation caused by uneven clamping force is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of superchargers, and in particular to a method for processing and detecting a sealing cover at a pressure end of a supercharger. Background Art

[0002] The pressure end sealing cover is an important part of the supercharger product, such as Figure 1 As shown, this part separates the gaseous fluid at the compression end from the liquid fluid oil lubrication system in the supercharger and plays a sealing role. This part is fixed together with the diffuser on the large end of the bearing housing. During operation, it has relative rotational motion with the STC oil-slinging plate, the piston ring with buckle, and the compressor impeller. This part has high requirements for assembly and matching relationship with the surrounding parts. The outer circle and end face of the large end boss match with the inner hole and end face of the diffuser, the large outer circle and end face match with the large end countersunk hole and countersunk platform of the bearing housing, and the small end inner hole and step match with the compressor impeller, the outer circle and end face of the piston ring with buckle to meet the working sealing needs of the machine. The sealing effect directly affects the flow rate of the whole machine, that is, the compression ratio efficiency of the supercharger. As shown Figure 3 As shown in the figure, the large end face of the part is provided with a sealing ring groove on the end face close to the large outer circle, and the small end outer circle is also provided with two R-shaped ring grooves. Due to the thin wall of this part, a special ring groove turning tool is required for processing. At the same time, the part has a "convex" structure, and the part has high requirements for dimensional accuracy and form and position accuracy, which are difficult to achieve. It is deformed during processing and clamping. The dimensional accuracy and form and position accuracy cannot meet the design requirements after various debugging and processing. Summary of the Invention

[0003] The object of the present invention is to provide a method for processing and inspecting a sealing cover at the pressure end of a supercharger, so as to keep the parts clamped in a natural state and avoid internal stress deformation caused by uneven clamping force on the parts.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a method for processing a sealing cover of a pressure end of a supercharger, comprising:

[0005] S1 four-claw clamps the outer circle of the small end of the blank, aligns the outer circle and end face of the blank, and rough turns the big end;

[0006] The S2 three-jaw clamp has been turned on the outer circle, the large end face is leveled, and after the runout of the large outer circle is aligned to no more than 0.06, the small end is rough turned;

[0007] S3 three-jaw clamp has turned the outer circle, the end face is leveled, and after the runout of the outer circle is aligned to no more than 0.05, semi-finish turning the end face and inner hole;

[0008] S4 uses the tool for finishing the external circle of the pressure end sealing cover. After aligning the tooling positioning plane and positioning the external circle with a runout of no more than 0.02, install the pressure end sealing cover, tighten it with the pressure plate, and finish turn the front and back end faces, external circle, and end face sealing ring groove;

[0009] S5 uses the tool for finishing the oil ring groove of the pressure end sealing cover, puts on the limit plate and presses it tightly, aligns the A surface and C circle of the pressure end sealing cover that has been turned to be no more than 0.02, and then finishes the oil ring groove of the small end;

[0010] S6 uses the pressure end sealing cover to fine turn the inner hole turning tool. The end face runout of the tool is not greater than 0.02. The pressure end sealing cover is installed, the end face is leveled, and the positioning plate is placed to press it tightly. After the outer circle runout of the pressure end sealing cover ΦE is not greater than 0.02, the inner hole is fine turned.

[0011] S7 Draw a vertical center line on the large end face according to the machining drawing and lead it to the small end face;

[0012] With the small end of S8 facing upward, round the part and align the vertical center line, mill the oil ring groove of the small end to the required size according to the drawing, ensuring the roughness of Ra6.3;

[0013] Turn S9 over with the big end facing up, find the round part, align the vertical center line, drill 3 through holes according to the drawing and expand the holes to 3-Φ11, drill 3-M6 threaded bottom holes, chamfer the hole mouth 0.5x45° and then start tapping;

[0014] S10 clamping step.

[0015] Among them, the external cylindrical turning tool for the pressure end sealing cover includes a support body, a positioning core shaft, a pressure plate and a hexagonal nut; the positioning core shaft is fixedly connected to the support body and is located at the top of the support body; the pressure plate is located on the side of the positioning core shaft; the hexagonal nut is threadedly connected to the positioning core shaft and is located at the top of the positioning core shaft.

[0016] Among them, the pressure end sealing cover fine turning oil ring groove turning tool includes a positioning plate, multiple limit plates and multiple hexagon socket head screws; the multiple limit plates are respectively located on the top of the positioning plate; the multiple hexagon socket head screws are respectively threadedly connected to the positioning plate and respectively pass through the multiple limit plates.

[0017] Among them, the pressure end sealing cover fine turning inner hole turning tool includes a base, multiple positioning plates and multiple hexagonal head bolts; the multiple positioning plates are respectively located on the top of the base; the multiple hexagonal head bolts are respectively threadedly connected to the base and respectively pass through the multiple positioning plates.

[0018] In a second aspect, the present invention further provides a method for detecting a sealing cover of a pressure end of a supercharger, comprising:

[0019] Processing method of supercharger pressure end sealing cover;

[0020] The size of the inner hole finished in step S6 is detected.

[0021] The present invention provides a processing and detection method for a supercharger pressure end sealing cover, which successfully solves the detection of the key dimension 28.72±0.02 by rationally arranging a 28.72±0.02 auxiliary measuring block and a Φ37.4±0.1 inner hole processing sequence; the present invention effectively controls deformation during part clamping and processing, and completes the high-precision positioning and matching surfaces of the parts through one clamping process in the same process, thus avoiding repeated clamping, positioning, and correction errors, and well ensuring the dimensional accuracy and form and position accuracy requirements of the parts; reducing the difficulty of part clamping and correction, and making part clamping and correction convenient, fast, and efficient, while keeping the parts clamped in a natural state, thus avoiding internal stress deformation caused by uneven force during part clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the assembly and matching relationship of the supercharger pressure end sealing cover.

[0024] Figure 2 This is the rough drawing of the pressure end sealing cover.

[0025] Figure 3 It is a processing diagram of the pressure end sealing cover of the present invention.

[0026] Figure 4 It is a figure showing the process of rough turning the big end of the pressing end sealing cover of the present invention.

[0027] Figure 5 It is a process diagram of rough turning the small end of the pressure end sealing cover of the present invention.

[0028] Figure 6 It is an accompanying drawing of the semi-finish turning process of the pressure end sealing cover of the present invention.

[0029] Figure 7 It is an accompanying drawing of the process for fine turning the outer circle of the pressing end sealing cover of the present invention.

[0030] Figure 8 It is an accompanying drawing of the process for fine turning the oil-spinning ring groove of the pressure end sealing cover of the present invention.

[0031] Figure 9 It is an accompanying drawing of the process for fine turning the inner hole of the pressure end sealing cover of the present invention.

[0032] Figure 10 It is a schematic diagram of the clamping positioning symbol of the present invention.

[0033] Figure 11 It is a structural schematic diagram of a tool for fine turning the outer circle of a pressing end sealing cover according to the present invention.

[0034] Figure 12 It is a structural schematic diagram of a tool for fine turning a compression end sealing cover and an oil-slinging ring groove turning according to the present invention.

[0035] Figure 13 It is a structural schematic diagram of a tool for fine turning the inner hole of a pressure end sealing cover according to the present invention.

[0036] Figure 14 This is a schematic diagram of the 28.72±0.02 auxiliary measurement block of the present invention.

[0037] Figure 15 It is a schematic diagram of the method for detecting the size of 28.72±0.02 of the present invention.

[0038] Figure 16 The present invention is a flowchart of a method for processing a supercharger pressure end sealing cover.

[0039] Figure 17 The present invention is a flow chart of a method for detecting a sealing cover at the pressure end of a supercharger.

[0040] 11-support body, 12-positioning core shaft, 13-pressure plate, 14-hexagonal nut, 21-positioning plate, 22-limiting plate, 23-hexagon socket head screw, 31-base, 32-positioning plate, 33-hexagonal head bolt. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0042] See also Figures 1 to 17 In a first aspect, the present invention provides a method for processing a sealing cover of a pressure end of a supercharger, comprising:

[0043] S1 four-claw clamps the outer circle of the small end of the blank, aligns the outer circle and end face of the blank, and rough turns the big end; (See Figure 4 )

[0044] S2 three-jaw clamp has been turned the outer circle, the large end face is leveled, and after the runout of the large outer circle is aligned to no more than 0.06, the small end is rough turned; (See Figure 5 )

[0045] S3 three-jaw clamp has turned the outer circle, the end face is flat, and after the outer circle runout is not greater than 0.05, semi-finish turning the end face and inner hole; (See Figure 6 )

[0046] S4 uses the external turning tool of the pressure end sealing cover to align the tooling positioning plane and the positioning external circle runout to no more than 0.02, then install the pressure end sealing cover, press it with the pressure plate 13, and finish turn the front and back end faces, external circle, and end face sealing ring groove; (See Figure 7 )

[0047] The specific steps include:

[0048] S41 Each side of the machine is turned with a 0.3mm margin;

[0049] S42 rough and fine turn the end face sealing ring groove to the dimensions shown in the figure;

[0050] S43 precision turning of each surface to the drawing size.

[0051] S5 uses the tool for finishing the oil ring groove of the pressure end sealing cover, puts the limit plate 22 to press it tightly, aligns the A surface and C circle of the pressure end sealing cover, and finishes the oil ring groove of the small end after the runout is no more than 0.02; (See Figure 8 )

[0052] S6 uses the pressure end sealing cover to fine turn the inner hole turning tool, and the end face runout of the tool is not greater than 0.02. Install the pressure end sealing cover, level the end face, and press it with the positioning plate 32. After the outer circle runout of the pressure end sealing cover ΦE is not greater than 0.02, fine turn the inner hole;

[0053] The upper pressure end sealing cover is fine turned by the inner hole turning tool, and the end face runout of the tool is not greater than 0.02. Install the pressure end sealing cover, flatten the end face, and press it with the positioning plate 32. After the outer circle runout of the pressure end sealing cover ΦE is not greater than 0.02, fine turn the inner hole (see Figure 9 ), requirement: Φ37.4±0.1 inner hole shall not be turned first, and shall be processed after the Φ38±0.02 inner hole processing inspection is completed and qualified. The remaining dimensions shall be processed according to the attached drawings.

[0054] S7 Draw a vertical center line on the large end face according to the machining drawing and lead it to the small end face;

[0055] With the small end of S8 facing upward, round the part and align the vertical center line, mill the oil ring groove of the small end to the required size according to the drawing, ensuring the roughness of Ra6.3;

[0056] With the small end facing upward, round the part and align the vertical center line, mill the small end oil ring groove to the required size of 25, 23.15±0.1, and 30° according to the drawing, ensuring the roughness of Ra6.3.

[0057] Turn S9 over with the big end facing up, find the round part, align the vertical center line, drill 3 through holes according to the drawing and expand the holes to 3-Φ11, drill 3-M6 threaded bottom holes, chamfer the hole mouth 0.5x45° and then start tapping;

[0058] S10 clamping process;

[0059] The specific steps include:

[0060] After deburring the reverse side of the S101 threaded hole, tap out a 3-M6 threaded through hole;

[0061] S102 Remove all burrs, and pay attention to the inner hole to keep the sharp edges free from scratches and bluntness;

[0062] S103 Laser print the drawing number, casting furnace number, and processing batch number along the circumferential direction at the position shown in the figure, with a character height of 5mm.

[0063] Furthermore, the external cylindrical turning tool for the pressure end sealing cover includes a support body 11, a positioning core shaft 12, a pressure plate 13 and a hexagonal nut 14; the positioning core shaft 12 is fixedly connected to the support body 11 and is located at the top of the support body 11; the pressure plate 13 is located on the side of the positioning core shaft 12; the hexagonal nut 14 is threadedly connected to the positioning core shaft 12 and is located at the top of the positioning core shaft 12.

[0064] In this embodiment, the pressure end sealing cover is placed on the support body 11, the positioning core shaft 12 positions the pressure end sealing cover, and the hexagonal nut 14 is rotated so that the hexagonal nut 14 drives the pressure plate 13 to move and tighten and fix the pressure end sealing cover.

[0065] Furthermore, the pressure end sealing cover fine turning oil ring groove turning tool includes a positioning plate 21, multiple limit plates 22 and multiple hexagon socket head screws 23; the multiple limit plates 22 are respectively located on the top of the positioning plate 21; the multiple hexagon socket head screws 23 are respectively threadedly connected to the positioning plate 21, and respectively pass through the multiple limit plates 22.

[0066] In this embodiment, the pressure end sealing cover is placed on the positioning plate 21, the limiting plate 22 and the positioning plate 21 are connected by the hexagon socket head screw 23, and the pressure end sealing cover is pressed and fixed by multiple limiting plates 22.

[0067] Furthermore, the pressure end sealing cover fine turning inner hole turning tool includes a base 31, multiple positioning plates 32 and multiple hexagonal head bolts 33; the multiple positioning plates 32 are respectively located on the top of the base 31; the multiple hexagonal head bolts 33 are respectively threadedly connected to the base 31 and respectively pass through the multiple positioning plates 32.

[0068] In this embodiment, the pressure end sealing cover is placed on the base 31 , and the positioning plate 32 and the base 31 are connected by the hexagonal bolts 33 . The pressure end sealing cover can be pressed and fixed by using a plurality of the positioning plates 32 .

[0069] In a second aspect, the present invention further provides a method for detecting a supercharger pressure end sealing cover, including a method for processing the supercharger pressure end sealing cover, and further comprising:

[0070] S11 detects the size of the inner hole finished in step S6.

[0071] The specific steps include:

[0072] S111 uses two identical standard equal-height blocks to pad the D surface of the pressure end sealing cover and place it on the inspection work platform;

[0073] S112 Use a 50-75 / 0.001 micron outside micrometer to measure the height L dimension of the auxiliary measuring block at 28.72±0.02 and record the value;

[0074] S113 Place the 28.72±0.02 auxiliary measuring block with the large end facing downward into the inner hole of the pressure end sealing cover, making sure the large end surface of the 28.72±0.02 auxiliary measuring block is flush with the stepped end surface of the Φ38±0.02 inner hole of the pressure end sealing cover;

[0075] S114 measures the height dimension H of the end face of the equal height block to 28.72±0.02 and the auxiliary measurement block end face;

[0076] The specific steps include:

[0077] S1141 uses a height gauge to roughly measure the height dimension H';

[0078] S1142 Then, using standard measuring tools, clean gauge blocks of different specifications based on the roughly measured height dimension H' and combine them into a gauge block of a certain height dimension R. Record the combined gauge block height dimension R. Requirements: a. Ensure that the gauge blocks are firmly and reliably attached to each other. b. The combined gauge block height dimension R must be as close as possible to dimension H', with a difference of no more than 0.1mm. (Note: Because the final test space dimension tolerance is ±0.02mm, a lever dial indicator with an accuracy of 0.002mm is required to meet the measurement dimensional accuracy. To prevent damage to the dial indicator due to exceeding the dial indicator range, the dimension difference must not exceed 0.1mm).

[0079] S1143 Place the combined standard measuring tool gauge blocks on the equal height block plane;

[0080] The S1144 combination gauge block is used as the measurement reference. Use a lever dial indicator with an accuracy of 0.002mm to calibrate the dial indicator to zero based on the measurement reference. Push the lever dial indicator to measure the small end face of the auxiliary measuring block at 28.72±0.02. Read and record the lever dial indicator reading Q1 (Note: pay attention to the positive and negative readings).

[0081] S1145 Calculate the height H measured size: H = R + Q1 (see Figure 15 Dimension 28.72±0.02 (diagram of the detection method)

[0082] S1146 calculation size: The pressure end sealing cover detection size (28.72±0.02) = 28.72±0.02 auxiliary measuring block height dimension L-height dimension H.

[0083] The present application provides a method for processing and inspecting a supercharger compression end sealing cover, which successfully solves the detection of the key dimension 28.72±0.02 by rationally arranging a 28.72±0.02 auxiliary measuring block and a Φ37.4±0.1 inner hole processing sequence; the present application effectively controls deformation during part clamping and processing, and the positioning and matching surfaces of the parts with high precision requirements are clamped and processed once in the same process, thus avoiding repeated clamping, positioning, and correction errors, and ensuring the dimensional accuracy and form and position accuracy requirements of the parts; reducing the difficulty of part clamping and correction, and making part clamping and correction convenient, fast, and efficient, while keeping the parts clamped in a natural state, thus avoiding internal stress deformation caused by uneven force during part clamping.

[0084] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A method for processing a sealing cover of a supercharger pressure end, characterized in that: include: S1 four-claw clamps the outer circle of the small end of the blank, aligns the outer circle and end face of the blank, and rough turns the big end; The S2 three-jaw clamp has been turned on the outer circle, the large end face is leveled, and after the runout of the large outer circle is aligned to no more than 0.06, the small end is rough turned; S3 three-jaw clamp has turned the outer circle, the end face is leveled, and after the runout of the outer circle is aligned to no more than 0.05, semi-finish turning the end face and inner hole; S4 uses a tool for fine turning the external circle of the pressure end sealing cover, which includes a support body, a positioning core shaft, a pressure plate and a hexagonal nut; the positioning core shaft is fixedly connected to the support body and is located on the top of the support body; the pressure plate is located on the side of the positioning core shaft; the hexagonal nut is threadedly connected to the positioning core shaft and is located on the top of the positioning core shaft; after the positioning plane of the tool is aligned and the positioning external circle runout is no more than 0.02, the pressure end sealing cover is installed, the pressure plate is placed and pressed tightly, and the front and back end faces, external circle, and end face sealing ring groove are fine turned; S5 uses a tool for fine turning the oil ring groove of the pressure end sealing cover. The tool includes a positioning plate, multiple limit plates, and multiple hexagon socket head screws; the multiple limit plates are respectively located on the top of the positioning plate; the multiple hexagon socket head screws are respectively threadedly connected to the positioning plate and pass through the multiple limit plates; the limit plates are tightened and the runout of the A surface and C circle of the pressure end sealing cover is aligned to no more than 0.02, and then the small end oil ring groove is fine turned; S6 uses a pressure end sealing cover fine turning inner hole turning tool, which includes a base, multiple positioning plates and multiple hexagonal head bolts; The plurality of positioning plates are respectively located on the top of the base; The plurality of hexagonal bolts are respectively threadedly connected to the base and respectively pass through the plurality of positioning plates; the positioning end face runout of the lathe tool is adjusted to be no more than 0.02, the pressure end sealing cover is installed, the end face is leveled, the positioning plate is placed and pressed tightly, and after the outer circle runout of the pressure end sealing cover ΦE is adjusted to be no more than 0.02, the inner hole is precision turned; S7 Draw a vertical center line on the large end face according to the machining drawing and lead it to the small end face; With the small end of S8 facing upward, round the part and align the vertical center line, mill the oil ring groove of the small end to the required size according to the drawing, ensuring the roughness of Ra6.3; Turn S9 over with the big end facing up, find the round part, align the vertical center line, drill 3 through holes according to the drawing and expand the holes to 3-Φ11, drill 3-M6 threaded bottom holes, chamfer the hole mouth 0.5x45° and then start tapping; S10 clamping step.

2. A method for detecting a supercharger pressure end sealing cover, comprising the method for processing a supercharger pressure end sealing cover according to claim 1, characterized in that: Also includes: The size of the inner hole finished in step S6 is detected.

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