阅读说明：本技术 燃气轮机接管扩散器接管固定环组合加工工艺 (Combined machining process for connecting pipe diffuser and connecting pipe fixing ring of gas turbine ) 是由 姜雪 王向阳 张杨 于 2021-10-11 设计创作，主要内容包括：本发明提供了燃气轮机接管扩散器接管固定环组合加工工艺,步骤一：工件拆分；步骤二：对步骤一中拆分完成之后的毛坯件进行下料；步骤三：对毛坯件进行初加工,并对毛坯件预留加工量；步骤四：制作接管固定环加工工装,并将待加工的毛坯件与接管固定环加工工装相固定；步骤五：将步骤四中加工完成的零件本体与焊接部件毛坯件进行拼焊；步骤六：制作用于L型槽口加工的刀具；步骤七：采用刀具对L型槽口进行加工；步骤八：整个接管固定环加工完成之后,进行接管固定环加工工装的拆除。通过制作装夹工装、修改焊接工艺、制作特殊刀具以及采用分散-再组合加工方式,解决了固定环加工难题。(The invention provides a gas turbine adapter tube diffuser adapter tube fixing ring combined processing technology, which comprises the following steps: splitting a workpiece; step two: blanking the blank after the splitting in the step one; step three: performing primary processing on the blank piece, and reserving processing amount for the blank piece; step four: manufacturing a connecting pipe fixing ring processing tool, and fixing a blank to be processed and the connecting pipe fixing ring processing tool; step five: welding the part body processed in the fourth step and a welding part blank piece in a splicing manner; step six: manufacturing a cutter for processing the L-shaped notch; step seven: machining the L-shaped notch by adopting a cutter; step eight: and after the whole connecting pipe fixing ring is processed, the connecting pipe fixing ring processing tool is dismantled. The difficult problem of processing the fixing ring is solved by manufacturing a clamping tool, modifying a welding process, manufacturing a special cutter and adopting a dispersion-recombination processing mode.)

1. The combined machining process of the adapter pipe and the adapter pipe fixing ring of the adapter pipe diffuser of the gas turbine is characterized by comprising the following steps of:

the method comprises the following steps: splitting a workpiece;

step two: blanking the blank after the splitting in the step one;

step three: performing primary processing on the blank piece, and reserving processing amount for the blank piece;

step four: manufacturing a connecting pipe fixing ring processing tool (14), and fixing a blank to be processed with the connecting pipe fixing ring processing tool (14);

step five: welding the part body (6) processed in the fourth step with a welding part blank (11);

step six: manufacturing a cutter (20) for machining the L-shaped notch (2);

step seven: machining the L-shaped notch (2) by adopting a cutter (20);

step eight: and after the whole connecting pipe fixing ring (1) is processed, the connecting pipe fixing ring processing tool (14) is detached.

2. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: the specific operation process of disassembling the workpiece in the first step is to divide the whole standard adapter fixing ring (1) into a part body (6) and a welding part (5) along the L-shaped notch (2) and the groove weld (4).

3. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 2, wherein: in the first step, a deviation distance A is reserved between the groove weld joint (4) and the inner side wall of the L-shaped groove opening (2) on the part body (6); and ensures that the groove weld (4) is over against the inlet groove part of the L-shaped groove opening (2).

4. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: the blank after the completion of the splitting in the second step is divided into a part body blank (9) and a welding part blank (11); a first welding groove (7) is machined in the part body blank (9), an annular groove (8) used for forming the L-shaped groove (2) is formed in the part body blank (9), and a first binding surface (10) is machined in the center of the part body blank (9); a second welding groove (10) matched with the first welding groove (7) is machined in the outer top of the welding part blank (11); the first welding groove (7) and the second welding groove (10) are welded in a matched mode to form a subsequent groove welding seam (4); the outer wall of the welding part blank (11) is provided with a second abutting surface (12) matched with the first abutting surface (10).

5. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: in the fourth step, the connecting pipe fixing ring processing tool (14) in the blank processing process adopts a split structure and comprises a first arc-shaped hoop (15) and a second arc-shaped hoop (17); the two combined end surfaces of the first arc-shaped hoop (15) and the second arc-shaped hoop (17) are fixedly connected through an ear plate (16); hinge bolt holes (19) which are symmetrically arranged are machined in the lug plate (16); and a positioning pin hole (18) for positioning the first arc-shaped hoop (15) and the second arc-shaped hoop (17) is processed on the inner side wall of the ear plate (16).

6. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 5, wherein: in the fourth step, in the process of assembling the part body blank (9) and the connecting pipe fixing ring processing tool (14), a first arc-shaped hoop (15) and a second arc-shaped hoop (17) are hooped on the outer wall of the part body blank (9), the part body blank (9) is fixed through a hinged bolt, and after the fixing is finished, the part body blank (9) and the connecting pipe fixing ring processing tool (14) are welded and fixed through surrounding spot welding (13); the whole part body blank (9) is clamped and fixed on a machine tool through a connecting pipe fixing ring machining tool (14), then an inner hole arc, a spigot and a groove on the part body blank (9) are machined, and finally a part body (6) is machined.

7. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: and in the concrete operation process in the fifth step, the part body (6) processed in the fourth step is used as a welding reference, and after the welding part blank (11) and the part body (6) are assembled, a groove welding seam (4) is formed between the first welding groove (7) and the second welding groove (10) in a welding mode, so that the welding of the first welding groove and the second welding groove is realized.

8. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: in the specific operation process in the sixth step, the cutter (20) comprises a cutter head (21) positioned at the head part, and a yielding step (22) is processed on the outer wall of a cutter handle of the cutter (20); the width of the cutter head (21) is consistent with that of an inlet groove of the L-shaped notch (2).

9. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: and the specific operation process in the seventh step is that a cutter (20) is installed on the machine tool, the L-shaped notch (2) is machined on the spliced and welded part body (6) and the welded part blank (11) by the cutter (20), and the reserved machining amount is machined after the machining is finished, so that the product machining is finished.

10. The gas turbine nozzle diffuser nozzle retaining ring combination process of claim 1, wherein: and in the step eight, the specific operation process is that the connecting bolt on the connecting pipe fixing ring machining tool (14) is removed, the surrounding spot welding (13) is removed, and the removal between the connecting pipe fixing ring machining tool (14) and the connecting pipe fixing ring (1) is completed.

Technical Field

The invention relates to a combined processing technology of a nozzle fixing ring of a nozzle diffuser of a gas turbine, belonging to the field of paperboard production equipment.

Background

The gas turbine is a strategic industry related to national energy and national defense safety, is the highest-end product in the field of energy power equipment and represents the highest level of equipment manufacturing industry; the 'adapter fixing ring' is one of important components on an H100-110 adapter diffuser, and is characterized by thin wall thickness, special material, easy deformation and complex structure, and the upper end surface of a part is an arc surface, and the lower end of the part is not stably supported, so that the part is difficult to clamp and cannot be fixed. The wall thickness of the main body of the part is only 6mm, and when part of the size is processed, the workpiece can deform along with the cutting edge, so that the workpiece cannot meet the requirements of a drawing; the welding groove of the original design of the pipe connecting diffuser can lead to steps left after the L-shaped groove is machined, and because in the groove, a cutter cannot stretch into the groove and cannot be manually polished in the later period. Referring to fig. 1 specifically, the original welding groove layout of the adapter tube fixing ring, the design has certain risk, namely during tailor welding, the welding flux flows to the groove close to the inner groove, and the residual welding flux is attached to the L-shaped groove.

In order to solve the problems, research and integration are carried out on multiple aspects such as material, process sequence, welding characteristics and the like, a feasibility scheme is formulated, and the machining is carried out in a high-quality and high-efficiency mode under the condition that the drawing requirements are met.

Disclosure of Invention

The invention aims to provide a combined processing technology for a connecting pipe diffuser and connecting pipe fixing ring of a gas turbine, which solves the processing problem of the fixing ring by manufacturing a clamping tool, modifying a welding process, manufacturing a special cutter and adopting a dispersion-recombination processing mode.

In order to achieve the technical features, the invention is realized as follows: the combined machining process of the adapter pipe, the diffuser adapter pipe and the fixing ring of the gas turbine comprises the following steps of:

the method comprises the following steps: splitting a workpiece;

step two: blanking the blank after the splitting in the step one;

step three: performing primary processing on the blank piece, and reserving processing amount for the blank piece;

step four: manufacturing a connecting pipe fixing ring processing tool, and fixing a blank to be processed and the connecting pipe fixing ring processing tool;

step five: welding the part body processed in the fourth step and a welding part blank piece in a splicing manner;

step six: manufacturing a cutter for processing the L-shaped notch;

step seven: machining the L-shaped notch by adopting a cutter;

step eight: and after the whole connecting pipe fixing ring is processed, the connecting pipe fixing ring processing tool is dismantled.

The specific operation process of disassembling the workpiece in the first step is to divide the whole standard adapter tube fixing ring into a part body and a welding part along an L-shaped groove opening and a groove welding seam.

In the first step, a deviation distance A is formed between a groove welding line and the inner side wall of the L-shaped groove opening on the part body; and ensure that the groove weld is over against the inlet groove part of the L-shaped groove opening.

Dividing the blank after the completion of the splitting in the second step into a part body blank and a welding part blank; a first welding groove is machined in the part body blank, an annular groove for forming an L-shaped groove is formed in the part body blank, and a first binding surface is machined in the center of the part body blank; a second welding groove matched with the first welding groove is machined in the outer top of the welding part blank; the first welding groove and the second welding groove are welded in a matched mode to form a subsequent groove weld; and a second binding surface matched with the first binding surface is processed on the outer wall of the welding part blank.

In the fourth step, the connecting pipe fixing ring processing tool in the blank processing process adopts a split structure and comprises a first arc-shaped hoop and a second arc-shaped hoop; the two combined end surfaces of the first arc-shaped hoop and the second arc-shaped hoop are fixedly connected through the ear plates; hinge bolt holes which are symmetrically arranged are processed on the lug plates; and a positioning pin hole used for positioning the first arc-shaped hoop and the second arc-shaped hoop is processed on the inner side wall of the ear plate.

In the fourth step, in the process of assembling the part body blank and the connecting pipe fixing ring processing tool, the first arc-shaped hoop and the second arc-shaped hoop are hooped on the outer wall of the part body blank, the part body blank is fixed through the hinged bolt, and after the part body blank and the connecting pipe fixing ring processing tool are fixed in a welding mode through encircling spot welding; the whole part body blank is clamped and fixed on a machine tool through a connecting pipe fixing ring processing tool, then an inner hole arc, a spigot and a groove on the part body blank are processed, and finally a part body is formed through processing.

And in the specific operation process in the fifth step, the part body processed in the fourth step is used as a welding reference, and after the welding part blank and the part body are assembled, a groove welding seam is formed between the first welding groove and the second welding groove in a welding mode, so that the welding of the first welding groove and the second welding groove is realized.

In the specific operation process in the sixth step, the cutter comprises a cutter head positioned at the head part, and a yielding step is processed on the outer wall of a cutter handle of the cutter; the width of the cutter head is consistent with that of the inlet groove of the L-shaped notch.

And the specific operation process in the seventh step is that a cutter is arranged on a machine tool, the cutter is adopted to process L-shaped notches of the part body and the welding part blank which are subjected to the tailor-welding, and the reserved processing amount is processed after the processing is finished, so that the product is smoothly processed and finished, and the quality problem is avoided.

And in the step eight, the specific operation process is that the connecting bolt on the connecting pipe fixing ring machining tool is dismounted, the surrounding spot welding is removed, and the dismounting between the connecting pipe fixing ring machining tool and the connecting pipe fixing ring is completed.

The invention has the following beneficial effects:

1. the difficult problem of processing the fixing ring is solved by manufacturing a clamping tool, modifying a welding process, manufacturing a special cutter and adopting a dispersion-recombination processing mode.

2. Through improving the technology position of current groove weld, the effectual welding flux of having overcome among the current groove welding process can lean on inner groove department to the groove to flow, can remain the welding flux and adhere to in L type groove, form and remain the step, and because groove and L groove entry collineation, the cutter of later stage machining can't clear away and remain the welding flux to this notch is narrow, dark, also can't carry out the problem of artifical polishing. By improving the process position of the groove weld, the welding strength is not changed, and the quality of the L-shaped groove is ensured.

3. By adopting the technical processes of disassembly, assembly welding and reprocessing, the processing quality of the parts is ensured, the processing technical process is simplified, and the processing quality is improved.

4. The invention carries out processing according to the modes of part splitting processing, combined tailor-welding and combined processing, and the process not only can ensure the size requirement of the inner cavity of the L-shaped groove, but also can obviously reduce the damage quantity and the processing time of the cutter.

5. The upper part and the lower part of the part are full processing surfaces, and the characteristics of thin wall, easy deformation and easy deformation of the stainless steel material are combined, so that a pressure plate and a disc claw cannot be used in the lathe process.

6. In the invention, because the tolerance of the notch of the L-shaped groove is tight, the concentricity is required to be 1.5mm, and the upper end of the L-shaped groove is blocked by the arc, the existing cutter is reformed, the finished product of the L-shaped groove can be ensured without hidden quality troubles, so that the product is successfully processed and finished without quality problems.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a half sectional view of a nipple retainer ring of the present invention.

FIG. 2 is a diagram of an original groove weld design location.

FIG. 3 is a groove weld design position diagram after modification of the present invention.

FIG. 4 is a cross-sectional view of the part body blank of the present invention.

FIG. 5 is a cross-sectional view of a welded component blank of the present invention.

Fig. 6 is a state diagram in which the part body blank and the welded part blank of the present invention are combined.

FIG. 7 is a view showing a state after welding the part body blank and the welding part blank of the present invention.

Fig. 8 is a top view of the nozzle fixing ring processing tool of the present invention.

Fig. 9 is a front view of a first arcuate ferrule half of the present invention.

Fig. 10 is a front view of a second arcuate ferrule of the present invention.

Fig. 11 is a sectional view after the part body blank and the nozzle fixing ring processing tool of the present invention are fixedly assembled.

Fig. 12 is a front view of the tool of the present invention.

Fig. 13 is a detailed process diagram of the tool of the present invention.

In the figure: fixed ring 1 is taken over, L type notch 2, remain step 3, groove weld 4, welding part 5, part body 6, first welding groove 7, ring channel 8, part body blank 9, second welding groove 10, welding part blank 11, second binding face 12, encircle spot welding 13, fixed ring processing frock 14 is taken over to fixed ring, first arc hoop 15, otic placode 16, second arc hoop 17, location pinhole 18, articulated bolt hole 19, cutter 20, tool bit 21, the ladder 22 of letting back.

Detailed Description

Embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1-13, a process for assembling and processing a nozzle diffuser nozzle retaining ring of a gas turbine includes the steps of:

the method comprises the following steps: splitting a workpiece;

the specific operation process of disassembling the workpiece is to divide the whole standard adapter fixing ring 1 into a part body 6 and a welding part 5 along the L-shaped notch 2 and the groove weld 4.

Wherein, the groove weld 4 deviates from the inner side wall of the L-shaped notch 2 on the part body 6 by a distance A; and ensures that the groove weld 4 is over against the inlet groove part of the L-shaped groove opening 2.

The adoption of it carries out the split to the work piece because according to original drawing requirement, there is certain risk in this design, during the tailor-welding promptly, the solder flux can flow by the interior groove department of L type notch 2 to the groove, has to remain the solder flux and adheres to in L type groove, because groove and L groove entry collineation, the cutter of later stage machining can't clear away and remain the solder flux, forms and remains step 3 to this notch is narrow, dark, also can't carry out the manual work and polish.

In order to avoid the problems, the internal reasoning of the company is questioned, and then a new technical scheme is determined, namely the groove position is moved according to the graph 3, so that the welding strength is not changed, and the quality of the L-shaped groove is ensured.

Step two: blanking the blank after the splitting in the step one;

the blank after the completion of the disassembly is divided into a part body blank 9 and a welding part blank 11; a first welding groove 7 is machined in the part body blank 9, an annular groove 8 for forming an L-shaped groove 2 is formed in the part body blank 9, and a first binding surface 10 is machined in the center of the part body blank 9; a second welding groove 10 matched with the first welding groove 7 is machined in the outer top of the welding part blank 11; the first welding groove 7 and the second welding groove 10 are welded in a matched mode to form a subsequent groove weld 4; the outer wall of the welding part blank 11 is provided with a second abutting surface 12 for cooperating with the first abutting surface 10. By adopting the part splitting method, the subsequent welding, assembling and combined processing are facilitated.

Step three: performing primary processing on the blank piece, and reserving processing amount for the blank piece; through the reserved processing amount, the subsequent fine processing amount is ensured.

Step four: manufacturing a connecting pipe fixing ring processing tool 14, and fixing a blank to be processed and the connecting pipe fixing ring processing tool 14;

in the fourth step, the connecting pipe fixing ring processing tool 14 in the blank processing process adopts a split structure and comprises a first arc-shaped hoop 15 and a second arc-shaped hoop 17; the two combined end surfaces of the first arc-shaped hoop 15 and the second arc-shaped hoop 17 are fixedly connected through an ear plate 16; hinge bolt holes 19 which are symmetrically arranged are machined in the lug plate 16; and a positioning pin hole 18 for positioning the first arc-shaped hoop 15 and the second arc-shaped hoop 17 is processed on the inner side wall of the ear plate 16.

In the process of assembling the part body blank 9 and the connecting pipe fixing ring processing tool 14, a first arc-shaped hoop 15 and a second arc-shaped hoop 17 are hooped on the outer wall of the part body blank 9, the part body blank 9 is fixed through a hinged bolt, and after the fixing is finished, the part body blank 9 and the connecting pipe fixing ring processing tool 14 are welded and fixed through surrounding spot welding 13; the whole part body blank piece 9 is clamped and fixed on a machine tool through a connecting pipe fixing ring processing tool 14, then an inner hole arc, a spigot and a groove on the part body blank piece 9 are processed, and finally the part body 6 is formed through processing.

The solid fixed ring of takeover processing frock 14 that adopts in this application, because after the split, the processing degree of difficulty greatly reduced of this part, be full machined surface from top to bottom for this part, the wall thickness that combines stainless steel material is thin, yielding characteristics, make can not use clamp plate and dish claw on the lathe process, for solving this difficult problem, through technical analysis, compromise present stage and follow-up processing content, special frock has been designed, this frock is formed through reforming transform with the frock of processing other products, and control cost, the one-tenth is dual-purpose.

Step five: welding the part body 6 processed in the fourth step with a welding part blank 11;

in the specific operation process, the part body 6 processed in the fourth step is used as a welding reference, and after the welding part blank 11 and the part body 6 are assembled, a groove welding seam 4 is formed between the first welding groove 7 and the second welding groove 10 in a welding mode, so that the welding of the first welding groove and the second welding groove is realized. The reliability of fixing the welding component blank 11 is ensured by adopting the connection mode of welding and tightening.

Step six: manufacturing a cutter 20 for processing the L-shaped notch 2;

in the specific operation process in the sixth step, the cutter 20 comprises a cutter head 21 positioned at the head part, and a yielding step 22 is processed on the outer wall of a cutter handle of the cutter 20; the cutting head 21 is kept in line with the width of the inlet slot of the L-shaped slot 2.

The cutter 20 is adopted in the application because the tolerance of the notch of the L-shaped groove is tight, the concentricity is required to be 1.5mm, and the upper end of the L-shaped groove is blocked by the arc, so that the existing cutter is reformed, the finished product of the L-shaped groove can be ensured, the hidden quality trouble is not left, the product is smoothly processed and finished, and the quality problem is avoided.

Step seven: machining the L-shaped notch 2 by using a cutter 20;

the specific operation process is that a cutter 20 is installed on a machine tool, the cutter 20 is adopted to process the L-shaped groove 2 of the part body 6 and the welding part blank 11 which are spliced and welded, and the reserved processing amount is processed after the processing is finished, so that the product is smoothly processed and finished, and the quality problem is avoided.

Step eight: after the whole nozzle fixing ring 1 is machined, the nozzle fixing ring machining tool 14 is dismantled.

And in the step eight, the specific operation process is that the connecting bolt on the connecting pipe fixing ring processing tool 14 is removed, the surrounding spot welding 13 is removed, and the removal between the connecting pipe fixing ring processing tool 14 and the connecting pipe fixing ring 1 is completed.

The effect comparison of the specific process of the invention is as follows:

this product has two, in taking over solid fixed ring's manufacturing, processes solid fixed ring according to conventional processing technology and improvement technology respectively, carries out the aspect such as time length, operability, quality to two solid fixed rings in the course of working and carries out the comparison of full aspect to form contrast data as follows:

table 1: comparison of relevant data of two processing technologies

Adapter fixing ring	Length of working	Loss of tool	Difficulty of operation	Quality hidden trouble
					Conventional processing technology	25h	6	Height of	There may be residual welding slag and steps in the groove
Improved processing technology	15h	2	In	Is free of

According to the technical scheme, the whole machining of the first H100-110 connecting pipe diffuser is smoothly completed in the workshop, after the machining is completed, special machining inspectors inspect the size and the machining content of the product, the inspection result meets the drawing specification requirements of Mitsubishi company, and the process updating, identifying and authenticating of the Mitsubishi company are passed.