CN115091145A - A kind of supercharger casting turbine processing method - Google Patents

Abstract

The invention relates to the technical field of machining, in particular to a supercharger casting turbine machining method, including roughing the outer circle and end face of the welding end of the turbine blank; Punch the center hole; grind the turbine blank based on the center hole; cut the outer circle length of the welding end of the rough turning turbine blank; finish the welding end of the turbine blank to obtain the finished turbine. The turbine processing method adopts a soft three-jaw clamping turbine The welding end of the blank shall be rough-turned with the same requirements as the outer circle of the welding surface for rough turning. The outer circle and end face of the non-welding end shall be rough-turned, and a center hole shall be machined on the end face of the non-welding end, and the follow-up shall be carried out based on the center hole. It can ensure that the center of the turbine is consistent with the center of the subsequent friction welding, and solve the problem that the welding end is not clamped when the turbine is processed, resulting in the inconsistency between the center of the turbine and the center of the subsequent friction welding.

Description

A kind of supercharger casting turbine processing method

technical field

The invention relates to the technical field of machining, in particular to a method for machining a supercharger casting turbine.

Background technique

Turbine is an important part of marine diesel engine which is the main power unit of ship, and the technical level of supercharger casting turbine directly affects the working efficiency of marine diesel engine.

When the non-welded surface of the existing turbine is processed, the welding surface end of the turbine is not clamped, resulting in the inconsistency between the center of the turbine and the center of the subsequent friction welding.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a supercharger casting turbine processing method, which aims to solve the problem that the welding end is not clamped during turbine processing, resulting in the inconsistency between the turbine center and the center during subsequent friction welding.

In order to achieve the above purpose, the present invention provides a supercharger casting turbine processing method, comprising the following steps:

The outer circle and end face of the welding end of the rough turning turbine blank;

The outer circle of the welding end of the turbine blank is clamped by the soft three-jaw clamp;

Top the center hole on the end face after rough turning;

grinding the turbine blank based on the center hole;

cutting the outer circle length of the welding end of the rough turning turbine blank;

Finish turning the welded end of the turbine blank to obtain a finished turbine.

Wherein, after finishing the welding end of the turbine blank to obtain a finished turbine, the method further includes: welding the main shaft and the welding end of the finished turbine, and performing dynamic balancing treatment.

Wherein, the specific method of the outer circle and end face of the welding end of the rough turning turbine blank:

Three claws clamp the outer circle of the welding end of the turbine blank, and align the outer circle and end face;

Punch a center hole on the end face of the light, and rough the turbine blank.

Wherein, the specific method of topping the center hole on the end face after rough turning:

Eject the center hole, and light out the high point of the end face;

Light out the outer circle and end face.

Wherein, the detailed method of obtaining the finished turbine is the welding end of the finished turbine blank:

The outer circle of the welding end of the turbine blank is clamped by the soft three-jaw clamp;

Align the outer circle and end face of the non-welded end, and finish turning.

The supercharger casting turbine processing method of the present invention includes rough turning of the outer circle and end face of the welding end of the turbine blank; the outer circle of the welding end of the turbine blank is clamped by soft three claws; Grinding the turbine blank based on the center hole; cutting the outer circle length of the welding end of the rough turning turbine blank; finishing turning the welding end of the turbine blank to obtain a finished turbine. The turbine processing method adopts a soft three The claw clamps the welded end of the turbine blank, and adopts the same requirements as the rough turning of the outer circle of the welding surface. The outer circle and end face of the non-welded end are rough-machined. At the same time, a center hole is machined on the end face of the non-welded end, and the center hole is used. Follow-up processing operations are carried out as the benchmark to ensure that the center of the turbine is consistent with the center of the subsequent friction welding, so as to solve the problem that the welding end is not clamped when the turbine is processed, resulting in the inconsistency between the center of the turbine and the center of the subsequent friction welding.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of a method for machining a supercharger cast turbine provided by the present invention.

Figure 2 is a schematic diagram of the outer circle and end face of the welded end of the rough-turned turbine blank.

3 is a schematic diagram of the outer circle of the welding end of the turbine blank and the top center hole on the end face after rough turning of the soft three-jaw clamp.

FIG. 4 is a schematic diagram of grinding the turbine blank based on the center hole.

Figure 5 is a schematic diagram of finishing the welded end of the turbine blank to obtain a finished turbine.

Figure 6 is a schematic diagram of turbine processing.

FIG. 7 is a schematic diagram of welding the main shaft and the welded end of the finished turbine and performing dynamic balancing treatment.

Figure 8 is a machining process card.

Detailed ways

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

Please refer to FIG. 1 to FIG. 8 , the present invention provides a supercharger casting turbine processing method, which includes the following steps:

The outer circle and end face of the welding end of the S1 rough turning turbine blank;

Specifically, in order to control the deviation between the center of rotation of the turbine and the center of mass of the turbine and reduce the residual unbalance of the turbine shaft after welding, when machining the outer circle of the turbine blank, the outer circle at the runner is mainly aligned, that is, the runner is used for alignment. Benchmark (the main reason is that according to the turbine structure analysis, most of the mass of the turbine is in the solid part of the flow channel, and using the flow channel as the alignment benchmark can minimize the deviation between the turbine rotation center and the mass center), and at the same time in the turbine blank A center hole is machined on the end face.

Specific way:

S11 three-jaw clamps the outer circle of the welding end of the turbine blank, and aligns the outer circle and end face;

The S12 light-emitting end face is punched with a center hole, and the turbine blank is rough-machined.

Specifically, light out: all surfaces or outer circles to be machined are machined out by machining, and the entire end surface or outer circle after machining is not allowed to have original traces before processing.

S2 soft three-jaw clamps the outer circle of the welding end of the turbine blank;

S3 tops the center hole on the end face after rough turning;

Specific way:

S31 pushes out the center hole, and light out the high point of the end face;

S32 light out the outer circle and end face.

S4 grinds the turbine blank based on the center hole;

Specifically, the center hole processed by rough turning is used as the clamping and positioning reference, and the center holes at the top two ends are ground for the outer circle of the non-welding end, the large outer circle at the blade and the end face of the blade at the welding end. Grinding the outer circle of the non-welding end is mainly used for the clamping datum of the welding end of the subsequent finishing; grinding the end face of the blade at the welding end is mainly used for aligning the datum in the welding end of the subsequent finishing; grinding the large outer circle of the blade is mainly used for the welding surface of the subsequent finishing It is used for alignment reference and tooling positioning during friction welding (to ensure that the turbine and the optical axis are concentric during welding to reduce the unbalance of the turbine shaft after welding. In addition, the machining drawing of the circular turbine requires processing, but it is used as the machining benchmark for finishing and subsequent turbines. The positioning datum is required for friction welding with the optical axis, and the other circle needs to be processed).

S5 cutting the outer circle length of the welding end of the rough turning turbine blank;

Specifically, the excess length of the outer circle of the welded end of the turbine blank is cut off by wire cutting (ie, the process chuck reserved during casting is cut off, and the process chuck is about 20 mm long). The main purpose of reserving this process chuck is for the clamping of the outer circle and end face of the non-welded end. According to the requirements of the turbine processing drawing, the final length of the outer circle of the welded end is only 1mm long, while the outer circle of the non-welded end and When the end face is used, only the welding end can be clamped. The blade cannot be clamped because it is discontinuous and in a blank state, so it can only clamp the outer circle of the welding surface. However, according to the size of the drawing, the clamping length is not enough. The outer circle of the welding surface is lengthened, and the process chuck is reserved for clamping. At the same time, because the turbine is made of superalloy, the processing efficiency during turning is very low. Considering the production cycle and processing cost, the process chuck is removed by wire cutting, leaving only a 1mm margin for finishing.

S6 finish turning the welded end of the turbine blank to obtain the finished turbine.

Specifically, the main shaft is welded to the welded end of the finished turbine, and dynamic balance processing is performed. The specific operation is as follows: place the main shaft on the support position, perform dynamic balance on the TT and V planes, and the deweighting position is the position indicated by x, See the machining process card for the range of deduplication. The spindle that has been dynamically balanced is marked with colored pens. During processing, soft three claws are used to hold the outer circle of the ground non-welding end, and the non-welding end face is flat and ground. The outer circle of the face, the end face and the inner hole, and at the same time, the step plane used for the positioning of the friction welding between the subsequent turbine and the optical axis is finished, and the outer circle at the blade is re-calibrated during processing to ensure that the center of the turbine is processed and the subsequent friction welding. The center is consistent, reducing the unbalance of the turbine shaft caused by the misalignment of the turbine and the optical axis during friction welding.

Specific way:

S61 soft three-jaw clamps the outer circle of the welding end of the turbine blank;

S62 Align the outer circle and end face of the non-welded end, and finish turning.

The above disclosure is only a preferred embodiment of the present invention, and of course, it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand that all or part of the process of realizing the above embodiment can be implemented according to the present invention. The equivalent changes made by the invention claims still belong to the scope covered by the invention.

Claims (5)

1. a supercharger casting turbine processing method, is characterized in that, comprises the following steps: The outer circle and end face of the welding end of the rough turning turbine blank; The outer circle of the welding end of the turbine blank is clamped by the soft three-jaw clamp; Top the center hole on the end face after rough turning; grinding the turbine blank based on the center hole; cutting the outer circle length of the welding end of the rough turning turbine blank; Finish turning the welded end of the turbine blank to obtain a finished turbine. 2. A kind of supercharger casting turbine processing method as claimed in claim 1 is characterized in that, After finishing the welding end of the turbine blank to obtain a finished turbine, the method further includes: Weld the main shaft and the welded end of the finished turbine, and do dynamic balancing treatment. 3. A kind of supercharger casting turbine processing method as claimed in claim 1 is characterized in that, The specific method of the outer circle and end face of the welding end of the rough turning turbine blank: Three claws clamp the outer circle of the welding end of the turbine blank, and align the outer circle and end face; Punch a center hole on the end face of the light, and rough the turbine blank. 4. a kind of supercharger casting turbine processing method as claimed in claim 1 is characterized in that, The specific method of topping the center hole on the end face after rough turning: Eject the center hole, and light out the high point of the end face; Light out the outer circle and end face. 5. A kind of supercharger casting turbine processing method as claimed in claim 1 is characterized in that, The concrete method of obtaining the finished turbine from the welding end of the finished turbine blank: The outer circle of the welding end of the turbine blank is clamped by the soft three-jaw clamp; Align the outer circle and end face of the non-welded end, and finish turning.

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