CN114211199A - A combined processing method for two-half thin-walled parts (static vanes) - Google Patents

Abstract

The invention relates to the technical field of machining, in particular to a combined machining method for two half-type thin-wall parts (stationary blades); assembling the two half stationary blades on a stationary ring; pin holes are formed in the circumferences of the assembled static blades and the static ring; finish turning processing is carried out on the sinking platforms, the excircle inclined planes, the end faces and the comb tooth air seal grooves of the static blades and the static rings after assembly; measuring the precision of the processed static blade and the static ring to obtain the qualified static blade and the qualified static ring; drilling a threaded hole in the qualified static ring; the qualified burrs on the static ring after the static blade and the drilled hole are removed, the detection precision of the static blade and the static ring is processed and manufactured, and the problems that in the prior processing technology, the qualified rate of the production and processing of the static blade is low, and the quality cannot be guaranteed are solved.

Description

A combined processing method for two-half thin-walled parts (static vanes)

technical field

The invention relates to the technical field of mechanical processing, in particular to a combined processing method for two-half thin-walled parts (static vanes).

Background technique

The stator blade is the core part of a certain type of air turbine. This part is installed on the air turbine casing. The blades of the stator blade are used to control the airflow during operation. The working environment is high temperature and high pressure, and there are high requirements for the strength of the parts. At the same time, this part and the surrounding parts also have high requirements for assembly and cooperation. The thickness, diameter, coaxiality, flatness, verticality and other precision requirements of special parts must be guaranteed, otherwise the parts will be rubbed during work. Wear, damage the air tightness between the casing and the rotor sleeve, causing safety accidents.

This type of part is a double-layer two-half thin-walled part (static vane), including an inner ring and a stationary ring. Static rings for hole slope and outer circle slope. The stationary vane is fixed by the inclination of the inner hole of the stationary ring and 25 circumferential pins driven on the outer circle of the stationary ring. Slope, it is difficult to clamp and align in the process of processing. The shape and position tolerance of the inner hole coaxiality of 0.01mm and the end face verticality of 0.01mm required by the drawing cannot be effectively guaranteed, which reduces the processing and production of the stator. pass rate.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a combined processing method for two-half thin-walled parts (static vanes), which aims to solve the problems of the existing processing technology, the low pass rate of production and processing of the stator vanes, and the inability to guarantee the quality.

In order to achieve the above purpose, the present invention provides a combined processing method for two-half thin-walled parts (static vanes),

Assemble the two halves of the stationary blade on the stationary ring;

pin holes on the circumference of the assembled stationary vane and the stationary ring;

Finishing machining is performed on the sinking platform, the outer circular slope, the end face and the comb-tooth air-sealing groove of the stationary blade and the stationary ring completed by the pin hole;

Measure the accuracy of the stator vane and the static ring after processing, and obtain the qualified stator blade and the static ring;

Drill threaded holes on the qualified static ring;

Remove the burrs on the qualified stator blade and the drilled stator ring. in,

The specific method of assembling the two halves of the stator blades on the static ring is: obtaining the two halves of the stator blades and the static ring;

Install the two halves of the stationary vanes into the stationary ring, and adjust the positions of the two halves of the stationary vanes on the stationary ring.

Wherein, the specific method of the pin hole on the circumference of the assembled stationary vane and the stationary ring is as follows: positioning the stationary ring with a combination clamp;

Drill cylindrical pin holes on the circumference of the fixed stationary ring and the stationary vane, and insert cylindrical pins into the cylindrical pin holes;

Punch holes in the mating ends of the cylindrical pin and the stationary ring.

Wherein, the specific method of finishing the fixed vane and the sinking platform, the outer circular inclined surface, the end surface and the comb-tooth air sealing groove of the stationary blade and the stationary ring completed by the pin hole is as follows: using a tool to clamp the pin hole to complete of the stationary blade and the stationary ring;

Finishing machining is performed on the outer circular inclined surface, the end surface and the comb-tooth air sealing groove of the clamped stationary vane and the stationary ring.

Wherein, the specific method of drilling threaded holes on the qualified static ring is as follows: pad the qualified static ring;

The drilling points for the stationary ring are confirmed, and threaded holes are drilled in the raised stationary ring based on the drilling points.

In a combined processing method for two-half thin-walled parts (static vanes) of the present invention, the two halves of the static vanes are assembled on a static ring; The stationary ring has been connected as a whole by screws), install the two halves of the stationary vane into the stationary ring smoothly, and make the mid-section plane of the stationary vane and the stationary ring align and be in the same straight line. Pin holes on the circumference of the assembled stationary vane and the stationary ring; finish machining the sinking platform, the outer circular slope, the end face and the comb-tooth air-sealing groove of the assembled stationary vane and the stationary ring; Measure the precision of the stator vane and the static ring after processing, and obtain the qualified stator blade and the static ring; drill threaded holes on the qualified static ring; The burr on the static ring after the hole is finished is removed. Because the material of the part is titanium alloy, the material of all drill bits and reamer required for processing are made of carbide with special coating, and the part is a double-layer two-half type The structure, the use of three claws to directly clamp the parts will cause the parts to be deformed by force, and after the outer circle bevel is processed, there is a problem that the parts are difficult to clamp and cannot be aligned. Special car tools are specially designed and manufactured to solve the problem. The stationary ring is clamped to prevent the parts from being deformed during processing. The special measuring tool is convenient for testing the accuracy of the stationary vane and the stationary ring. The accuracy is detected while processing and manufacturing, and the existing processing technology is solved. Low, the quality cannot be guaranteed.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the 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.

1 is a schematic structural diagram of a combination of a two-half thin-walled stator vane and a static ring provided by the present invention.

Figure 2 is a schematic diagram of the assembly of a two-half thin-walled stator vane and a static ring provided by the present invention.

Figure 3 is a schematic diagram of a two-half thin-walled part stator blade and a static ring being inserted into a cylindrical pin hole provided by the present invention.

4 is a schematic structural diagram of a special vehicle tool for a two-half thin-walled part stator blade and a stationary ring provided by the present invention.

Fig. 5 is a part clamping diagram of a two-half thin-walled part stator blade and a static ring provided by the present invention when the end face and the comb-tooth air-sealing groove are processed.

FIG. 6 is a schematic diagram of drilling holes for a stator vane and a static ring of a two-half thin-walled part provided by the present invention.

FIG. 7 is a part clamping diagram of a two-half thin-walled part stator vane and a static ring provided by the present invention when machining the outer circular slope of the static ring.

FIG. 8 is a schematic diagram of a measuring tool for a stator vane and a static ring of a two-half thin-walled part provided by the present invention.

9 is a schematic diagram of the use of a two-half thin-walled part stator blade and a static ring measurement tool provided by the present invention.

FIG. 10 is a flow chart of a combined processing method for a two-half thin-walled part (static vane) provided by the present invention.

Fig. 11 is a flow chart of the specific method of assembling the stationary vane stationary ring by a fitter.

Fig. 12 is a flow chart of the specific manner of the pin holes on the circumference of the stationary vane and the stationary ring.

FIG. 13 is a flow chart of the specific method of using special lathes to finish turning the stationary vane and the stationary ring sinking platform, the inclined plane, the end face and the inner air sealing groove.

FIG. 14 is a flow chart of the specific method of processing the connection holes and threaded holes of the stationary vane and the stationary ring.

specific way

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.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than An indication or implication that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, is not to be construed as a limitation of the invention. In addition, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Please refer to FIG. 1 to FIG. 14 , the present invention provides a combined processing method for two-half thin-walled parts (static vanes), including the following steps:

S1 assembles the two halves of the stationary vane on the stationary ring;

The specific method: S11 obtains the two halves of the stationary blade and the stationary ring;

First take out the semi-finished stationary vane (half on the left and right) and the semi-finished stationary ring (the stationary ring has been connected as a whole by screws). About 3.55°, the diameter of the small end of the inclined plane is φ283, and the diameter of the large end is φ288.

S12 Install the two halves of the stationary vanes into the stationary ring, and adjust the positions of the two halves of the stationary vanes on the stationary ring

Install the two halves of the stationary vane into the stationary ring smoothly, and make the mid-section plane of the stationary vane and the stationary ring aligned and in the same straight line, as shown in Figure 1, when installing, the stationary The big end of the ring is placed on the horizontal workbench, the small end of the stator blade is facing down, and it is snapped into the static ring along the inclined plane. When the end face of the stator blade is flush with the end face of the static ring, the installation is in place, as shown in Figure 2 shown.

S2 is a pin hole on the circumference of the assembled stationary vane and the stationary ring;

Specific method: S21 is positioned with a combined fixture to fix the static ring;

Position the large end face of the static ring and build a combined fixture. S22 Drill cylindrical pin holes on the circumference of the fixed stationary ring and the stationary vane, and insert cylindrical pins into the cylindrical pin holes.

First find the middle plane, and then drill 25 φ4 cylindrical pin holes on the hinge circumference on the combined stator blade and the static ring. When drilling, pay attention to the distance between the control center and the large end face of the static ring (due to the stator blade). , the static rings are semi-finished products, and the end face has a margin of 1.5mm). It should be noted that the φ4 cylindrical pins of GB/T119.2-2000 should be placed in the refrigerator 4 hours before the 20 drilling process, which can improve the resistance of the pins when they are inserted into the pin holes. After drilling and reaming the first φ4 cylindrical pin hole, insert a 4×30 cylindrical pin with a standard GB/T119.2-2000, as shown in Figure 3, and then drill and ream the remaining 24 φ4 pin holes , After the drilling and reaming is completed, insert the remaining 24 φ4 cylindrical pins with the standard GB/T119.2-2000. It should be noted that when inserting the pin, the residual cutting fluid in the pin hole should be dried. The pin should be completely sunk into the pin hole, and the hole of the pin hole should not be allowed to emerge, so as to avoid cutting the knife when the outer circle inclination is finished, and damage the tool.

S23 punch holes in the mating ends of the cylindrical pin and the static ring.

At the end of the cylindrical pin and the static ring, make a sample punch for anti-loosening treatment.

S3 performs finishing machining on the sinking platform, the outer circular inclined surface, the end surface and the comb-tooth air-sealing groove of the stationary blade and the stationary ring completed by the pin hole;

The specific method: S31 adopts the tool clamping and clamping the pin hole to complete the stationary blade and the stationary ring;

The soft three-jaw clamps the stationary ring, aligns the inner hole of the machine, turns the stationary vane, the end face of the stationary ring and the sinking table, and uses a special turning tool to clamp the parts, as shown in Figure 4. Tooling parts required: base, inner pressure plate, GB5780-2000 hexagon head bolts M30×120, GB95-85 washers, special tools How to use: clamp the base with a three-jaw chuck, place the parts on the base, pass the base The boss on the top positions the parts (the diameter of the boss is the same as the size of the static ring ΦA), and the inner pressure plate is placed (because the blades of the stator blade are thin, and there is no screw connection between the two halves of the stator blade, if the inner pressure plate is directly pressed on the On the stationary blade, it will cause the blade to deform and the two halves of the stationary blade to open from the midface, so the inner pressure plate needs to be pressed on the end face of the stationary ring). , When processing the inclined surface of the static ring, it is necessary to align the static ring runout of the inner pressure plate not more than 0.03mm.

S32, finishing machining is performed on the external inclined surface, the end surface and the comb-tooth air-sealing groove of the clamped stationary vane and the stationary ring;

The parts are clamped with special tools, the end face and the inner hole of the car have a runout of not more than 0.05mm, and the static ring inclined surface of the fine turning assembly is used to reach the size, and then the comb tooth air sealing groove and the other end face of the assembly are finely turned. , Parts clamping as shown in Figure 5. Tooling parts required for clamping: base, fastening ring, outer pressure plate, GB70-85 hexagon socket head screw M5 × 30, GB5780-2000 hexagon socket head bolt M8 × 30, GB95-85 washer, use Method: Put on the tightening ring, connect the tightening ring to the base through the inner hexagon screw, put on the outer pressure plate, and tighten the inner hexagonal bolt to make the outer pressure plate press the parts (the pressing position of the outer pressure plate is at the upper step position of the outer circle of the static ring), pay attention to : After confirming that the parts are pressed tightly, the inner pressure plate can be removed. Before processing the comb tooth ring groove of the stationary blade, it is necessary to align the inner hole and end face of the car, and the runout is not more than 0.03mm.

S4 measures the accuracy of the stationary vane and the stationary ring using a specially manufactured ranging;

公差要求，若Z端能通过沉台，则说明φA尺寸加工到位，但是不满足

公差要求，即：通过专用测量工具，T端能通过且Z端不通过的测量方法，可以高效测量

尺寸加工是否满足要求，有效解决了常规测量工具不能检测的问题。Using a special measuring tool, measure the size of the stator vane and the bevel of the static ring, the air seal groove of the comb teeth, and the accuracy of the other end face of the assembly. How to use the measuring tool: The tool is engraved with the T (through) end and the Z end. (stop) end symbol, when measuring, first place the T end downwards and pass the sinking table with a diameter of φA. If it cannot pass, it means that the size of φA has not been processed in place, and there is still a machining allowance. It needs to continue processing. If it can pass, then Then turn the Z end down to see if it can pass the sinking platform. If the Z end cannot pass through the sinking platform, it means that the φA size is processed in place and meets the requirements.

Tolerance requirements, if the Z end can pass through the sinking table, it means that the φA dimension is processed in place, but it does not meet the requirements

Tolerance requirements, that is: through special measuring tools, the T end can pass and the Z end can not pass the measurement method, which can be measured efficiently

Whether the dimensional processing meets the requirements effectively solves the problem that conventional measuring tools cannot detect.

Drilling threaded holes on the qualified static ring according to S5;

Specific method: S51 elevates the qualified static ring;

S52 confirms the drilling point of the static ring, and drills a threaded hole on the static ring that is raised based on the drilling point.

Align the facet of the part and the runout of the machined inner hole not more than 0.05mm, and process the threaded hole system on the static ring for connecting with the rest of the parts, as shown in Figure 6.

S6 removes the burrs on the qualified stator blades and the drilled stator ring.

The fitter removes the burrs of the stator vanes and the stator ring with a tool coated with a special coating.

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 implementing the above embodiment can be realized according to the rights of the present invention. The equivalent changes required to be made still belong to the scope covered by the invention.

Claims (5)

1. a two-half type thin-walled part (static vane) combined processing method, is characterized in that, comprises the following steps: Assemble the two halves of the stationary blade on the stationary ring; pin holes on the circumference of the assembled stationary vane and the stationary ring; Finishing machining is performed on the sinking platform, the outer circular slope, the end face and the comb-tooth air-sealing groove of the stationary blade and the stationary ring completed by the pin hole; Measure the accuracy of the stator vane and the static ring after processing, and obtain the qualified stator blade and the static ring; Drill threaded holes on the qualified static ring; Remove the burrs on the qualified stator blade and the drilled stator ring. 2. A kind of two-half thin-walled part (static vane) combined processing method as claimed in claim 1, is characterized in that, The specific method of assembling the two halves of the stator blades on the static ring is: obtaining the two halves of the stator blades and the static ring; Install the two halves of the stationary vanes into the stationary ring, and adjust the positions of the two halves of the stationary vanes on the stationary ring. 3. A kind of two-half thin-walled parts (static vane) combined processing method as claimed in claim 1, is characterized in that, The specific method of the pin holes on the circumference of the assembled stationary vane and the stationary ring is as follows: positioning the stationary ring with a combination clamp; Drill cylindrical pin holes on the circumference of the fixed stationary ring and the stationary vane, and insert cylindrical pins into the cylindrical pin holes; Punch holes in the mating ends of the cylindrical pin and the stationary ring. 4. a kind of two-half thin-walled parts (static vane) combined processing method as claimed in claim 1 is characterized in that, The specific method of finishing the stationary vane and the stationary ring's sinking platform, the outer circular inclined surface, the end face and the comb-tooth air-sealing groove completed by the pin hole is as follows: using a tool to clamp and clamp the pin hole completed. the stationary blade and the stationary ring; Finishing machining is performed on the outer circular inclined surface, the end surface and the comb-tooth air sealing groove of the clamped stationary vane and the stationary ring. 5. The combined processing method for a two-half thin-walled part (static vane) as claimed in claim 1, characterized in that, The specific method of drilling threaded holes on the qualified static ring is as follows: pad the qualified static ring; Confirm the drilling points for the stationary ring, and drill threaded holes on the stationary ring of the pad height based on the drilling points.

Images