CN112157323A - Electric spark tool for clamping turbine blades in batch and using method thereof - Google Patents

Electric spark tool for clamping turbine blades in batch and using method thereof Download PDF

Info

Publication number
CN112157323A
CN112157323A CN202011153320.2A CN202011153320A CN112157323A CN 112157323 A CN112157323 A CN 112157323A CN 202011153320 A CN202011153320 A CN 202011153320A CN 112157323 A CN112157323 A CN 112157323A
Authority
CN
China
Prior art keywords
turbine blade
positioning
base
electric spark
clamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011153320.2A
Other languages
Chinese (zh)
Inventor
刘相成
鲁建于
李成科
蒋中亮
徐海燕
税顺云
卿莉
杨意松
刘彦宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Jiangjin Shipbuilding Industry Co Ltd
Original Assignee
Chongqing Jiangjin Shipbuilding Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Jiangjin Shipbuilding Industry Co Ltd filed Critical Chongqing Jiangjin Shipbuilding Industry Co Ltd
Priority to CN202011153320.2A priority Critical patent/CN112157323A/en
Publication of CN112157323A publication Critical patent/CN112157323A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B23H11/003—Mounting of workpieces, e.g. working-tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/10—Working turbine blades or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The invention discloses an electric spark tool for clamping turbine blades in batch, which comprises a base, a positioning tooth block, a bracket, a pressure plate, a compression screw and a positioning pin, wherein the base is connected with a workbench of a forming machine and is provided with a plurality of inclined grooves and inclined planes, and the inclination angle alpha of each inclined groove and each inclined plane is consistent with the inclination angle of a blade tenon tooth; the positioning tooth block is arranged at the front end of the inclined groove of the base and fixedly connected with the base, and the front end of the positioning tooth block is provided with a first positioning tooth which is matched with tenon teeth at the back arc end of the blade; the bracket is arranged at the rear end of the inclined groove of the base and fixedly connected with the base, and the front end of the bracket is provided with a notch; the pressing plate is arranged above the positioning tooth block and the bracket, penetrates into a bracket notch and is connected with the bracket through a pin shaft, and the front end of the pressing plate is provided with a second positioning tooth which is matched with tenon teeth at the inner arc end of the blade; the compression screw is arranged at the rear end of the pressing plate and is in threaded connection with the pressing plate to drive the pressing plate to move up and down and clamp or loosen the blade; the positioning pin is arranged on the inclined plane of the base and is in contact with the tenon teeth of the blade to limit the left and right movement of the blade; the invention also discloses a using method of the electric spark tool.

Description

Electric spark tool for clamping turbine blades in batch and using method thereof
Technical Field
The invention belongs to the technical field of electric spark machining of turbine blades, and relates to an electric spark tool for clamping the turbine blades in batches and a using method thereof.
Background
The turbine rotor is the most important rotary part of machines such as a steam compressor, an aeration blower, a supercharger and the like, and the steam generated by the heat recovery system is utilized to push the machines to operate by the compression action so as to do work. The turbine blade is an important part for converting the energy of high-temperature gas into rotor mechanical work on a turbine rotor, and the specific mode is as follows: the high-temperature gas impacts the turbine blades to drive the turbine rotor to rotate at a high speed, the higher the temperature of the gas is, the more work is done, but in operation, the turbine blades not only need to bear corrosion and erosion caused by the high-temperature gas, but also need to bear huge centrifugal force, gas force and vibration load generated by high-speed rotation. In order to ensure the working stability of the turbine rotor, a lacing wire hole is processed at the front end of the turbine blade, the blades are connected into a group through lacing wires, the strength of the blades is enhanced, the self-vibration frequency of the blades is adjusted, and the resonance condition is improved.
Therefore, the turbine blade lacing wire hole machining and manufacturing quality is particularly important to guarantee. However, because the working environment of the turbine blade is very severe, a special alloy material with high endurance strength and enough toughness, good thermal fatigue resistance and mechanical fatigue resistance, and high-temperature oxidation resistance and hot corrosion resistance under a high-temperature environment needs to be adopted, the material processing difficulty is high, the processing flow of the turbine blade of the VTR304 model is known in detail through field investigation, and the existing electric spark tool has the following problems in the processing process of the lacing wire hole of the existing turbine blade:
1. when the tool is used for machining the turbine blade lacing wire hole, only one blade can be clamped for machining at one time, and two procedures of pre-hole drilling and hole cutting and cutting by wire cutting are needed, so that the machining efficiency is low, and the actual development requirements of enterprises cannot be met;
2. the lacing wire hole is easy to have the condition of a taper hole in the processing process, and the lacing wire can be blocked or even can not pass through the lacing wire hole;
3. the existing electric spark tool is not provided with a locking device, and the problem of unstable clamping of the turbine blade can be caused by abrasion of parts after the tool is used for a period of time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electric spark tool for clamping turbine blades in batches and a using method thereof, which are used for machining turbine blade lacing wire holes, can simultaneously clamp 5 blades for machining and can be used in combination with an electric spark forming machine tool, and the two steps of processes (electric spark pre-drilling and linear cutting hole forming) in the original lacing wire hole machining process are shortened into one step of process (electric spark one-time forming lacing wire holes), so that the problem of generating taper holes in the machining process of the original lacing wire holes is solved while the machining efficiency is improved.
The purpose of the invention is realized as follows:
an electric spark tool for clamping turbine blades in batches is placed on a workbench of an electric spark forming machine and used for machining lacing wire holes of the turbine blades in batches, and comprises a base and a clamping device, wherein the base is connected with the workbench, the top of the base is provided with a plurality of inclined grooves and inclined planes in the front-back direction, and the inclination angle alpha of each inclined groove and inclined plane to the horizontal plane is consistent with the inclination angle of a tenon tooth of the turbine blade, so that the turbine blades are clamped on the electric spark tool in an alpha angle; the positioning tooth block is arranged at the front end of the inclined groove of the base and is fixedly connected with a base screw, and the front end of the positioning tooth block is provided with a first positioning tooth which is matched with a tenon tooth at the back arc end of the turbine blade to position the clamping position of the turbine blade; the bracket is arranged at the rear end of the inclined groove of the base and is fixedly connected with the base through a screw, and a notch is formed in the front end of the bracket; the pressure plate is arranged above the positioning tooth block and the support, penetrates through a support notch and is connected with the support through a pin shaft, a second positioning tooth is arranged at the front end of the pressure plate and is matched with a tenon tooth at the inner arc end of the turbine blade, the pressure plate is matched with the positioning tooth block for use, and after the positioning tooth block clamps and positions the turbine blade, the second positioning tooth of the pressure plate downwards presses the tenon tooth of the turbine blade to tightly fix the turbine blade and limit the turbine blade to move up and down; the compression screw is arranged at the rear end of the pressure plate, is in threaded connection with the pressure plate, drives the pressure plate to move up and down by rotating the compression screw, and further clamps or loosens the turbine blade by the second positioning teeth of the pressure plate; the positioning pins are arranged on each inclined plane of the base and are in tight fit connection with the base, and each positioning pin is provided with a spherical head which is in contact with a molded surface on one side of a tenon tooth of the turbine blade, so that the movement of the turbine blade in the left and right directions is limited, and the clamping position precision of the turbine blade is improved; after the electric spark tool clamps and positions the turbine blade, the electrode rod arranged in the vertical direction of the electric spark forming machine is opposite to the processing position of the lacing hole of the turbine blade.
Furthermore, the inclined grooves and the inclined planes of the base are respectively provided with five, and each inclined groove is provided with a positioning tooth block, a support, a pressing plate and a compression screw.
Furthermore, the first positioning teeth of the positioning tooth block are two, when the positioning tooth block clamps the turbine blade, the first positioning teeth at the front end are matched and positioned with the fourth tenon teeth at the back arc end of the turbine blade, and the first positioning teeth at the rear end are matched and positioned with the second tenon teeth at the back arc end of the turbine blade.
Furthermore, when the pressing plate compresses tightly the turbine blade, the second positioning tooth of the pressing plate is matched and positioned with the third tenon tooth at the inner arc end of the turbine blade, the middle part of the pressing plate is provided with a pin hole and a yielding groove, the pin hole is used for penetrating through a pin shaft, the yielding groove is matched and installed with a support lug at the front end of the support, and the middle part of the pressing plate is clamped in the notch of the support.
Furthermore, the compression screw can increase or decrease the number of rotation turns according to the abrasion loss of parts in the electric spark tool, the clamping force on the pressure plate can be freely adjusted, and the turbine blade can be locked by the pressure plate.
Furthermore, cylindrical pins are arranged between the positioning tooth block and the base inclined groove and between the support and the base inclined groove, the positioning tooth block is reliably positioned by the cylindrical pins, the screws and the base inclined groove, and the support is reliably positioned and installed with the base by the screws and the cylindrical pins.
The use method of the electric spark tool for clamping the turbine blades in batch comprises the following steps:
step 1, assembling the electric spark tool for clamping the turbine blades in batch, firstly, placing a positioning tooth block and a support in each inclined groove of a base and fixedly installing the positioning tooth block and the support by using a screw and a cylindrical pin, ensuring that the positioning tooth block and the support are installed on the base in place by the cylindrical pin, the screw and the clamping into the inclined grooves of the base, then connecting a pressure plate and the support by a pin shaft, screwing a compression screw into a threaded hole at the rear end of the pressure plate, and finally installing a positioning pin on each inclined plane of the base;
step 2: cleaning the working table surface of the electric spark forming machine, then placing an electric spark tool, aligning the parallelism between the upper plane of the electric spark tool and the working table surface and the verticality between the side surface of the electric spark tool and the working table surface within a design range after placing, and then sucking the base through an electromagnet on the working table to reliably fix the electric spark tool;
and step 3: clamping the positioning measuring rod on an electric spark tool, determining the position to be machined of the lacing wire hole on each turbine blade by aligning the positioning measuring rod, and inputting the coordinate value corresponding to each hole in a numerical control program;
and 4, step 4: the positioning measuring rod is taken down, a turbine blade is clamped on an electric spark tool, the inner arc end of the turbine blade is upward, a fourth tenon tooth and a second tenon tooth on the back arc end of the turbine blade are respectively matched and positioned with first positioning teeth at the front end and the rear end of a positioning tooth block, the clamping position of the turbine blade is determined, after the positioning tooth block positions the turbine blade, a pressing plate is driven to move downwards by rotating a pressing screw, the third tenon tooth at the inner arc end of the turbine blade is pressed downwards by the second positioning teeth at the front end of the pressing plate, the turbine blade is positioned and clamped, the profile of one side of the tenon tooth of the turbine blade is contacted with the head of a positioning pin, and the left and right directions of;
and 5: and (4) sequentially processing the lacing wire holes, wherein before the lacing wire holes are processed, the verticality of the electrode bar needs to be corrected to be less than or equal to 0.01 mm.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the electric spark tool can clamp a plurality of turbine blades in batch at one time.
2. The application of the electric spark tool simplifies the processing technology, and the original electric spark pre-drilling and linear cutting are used for drilling holes, so that the one-time hole drilling by electric sparks is shortened.
3. The processing time is shortened, and the processing efficiency is improved. Experiments prove that 200 blades are machined, the total time of the machining is 2189 minutes according to the original machining mode, the novel electric spark tool is adopted, the machining process is simplified, and the machining time is shortened to 1513 minutes. The processing efficiency is improved by about 30 percent.
4. The electric spark tool disclosed by the invention is used for processing the lacing wire hole to form a hole by one-time electric spark, so that the problem that a taper hole is formed in an original processing mode is solved, and the processing quality is improved.
5. 5 turbine blades are clamped on an electric spark tool for machining at one time, and the machining time of one blade is about 7 minutes, and about 35 minutes in total. The frequency of clamping by replacing the blades by workers is reduced, and the labor intensity of the workers is reduced.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a front view of the base;
FIG. 5 is a top view of the base;
FIG. 6 is a front view of the positioning block;
FIG. 7 is a top view of the positioning block;
FIG. 8 is a front view of the platen;
FIG. 9 is a top view of the platen;
FIG. 10 is a schematic view of a compression screw;
FIG. 11 is a front view of the bracket;
FIG. 12 is a top view of the bracket;
FIG. 13 is a left side view of the bracket;
FIG. 14 is a schematic structural view of a locating pin;
FIG. 15a is a front view of a position measuring stick;
FIG. 15B is a cross-sectional view B-B of FIG. 15 a;
FIG. 15c is a view rotated in the direction A of FIG. 15 b;
FIG. 16a is a schematic structural view of a dovetail portion of a turbine blade;
FIG. 16b is a schematic view of the construction of the turbine blade back arc end and inner arc end portions.
Reference numerals
In the attached drawings, 1 is a base, 2 is a screw, 3 is a positioning tooth block, 4 is a pressure plate, 5 is a pin shaft, 6 is a retainer ring, 7 is a compression screw, 8 is a bracket, 9 is a cylindrical pin, 10 is a positioning pin, 11 is a turbine blade, 12 is a positioning measuring rod,
101 is an inclined groove, 102 is an inclined slope, 301 is a first positioning tooth, 401 is a second positioning tooth, 402 is a pin hole, 403 is an abdicating groove, 801 is a notch, 802 is a support lug, 1001 is a spherical head, 1101 is a back arc end of the turbine blade, 1102 is an inner arc end of the turbine blade, 1103 is a fourth tenon, 1104 is a second tenon, 1105 is a third tenon, 1106 is a side profile of the tenon, and 1107 is a lacing wire hole.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1-16 b, an electric spark tool for clamping turbine blades in batches is placed on a workbench of an electric spark forming machine and used for machining a lacing hole 1107 of the turbine blade 11 in batches, and comprises a base 1, a positioning tooth block 3, a bracket 8, a pressure plate 4, a compression screw 7 and a positioning pin 10, wherein the base 1 is connected with the workbench, the top of the base 1 is provided with a plurality of inclined grooves 101 and a plurality of inclined planes 102 along the front-back direction, because the turbine blade 11 adopts the shape of a tenon tooth of an inclined tooth, the inclination angle alpha of each inclined groove 101 and each inclined plane 102 to the horizontal plane is consistent with the inclination angle of the tenon tooth of the turbine blade 11, the inclination angle of the tenon tooth of the turbine blade 11 is 17 degrees, the top of the base 1 is designed into an inclined shape, and the turbine blade 11 is clamped on the electric spark tool at a certain angle, so that the electrode rod arranged in the vertical direction of the electric spark forming machine can be just opposite to the processing position of the lacing wire hole 1107 of the turbine blade.
As shown in fig. 4 and 5, in the present embodiment, five inclined grooves 101 and five inclined slopes 102 are respectively provided on the base, each inclined groove 101 is provided with a positioning tooth block 3, a bracket 8, a pressure plate 4 and a compression screw 7, and a safety space is provided between two adjacent inclined grooves 101 to ensure that the turbine blades 11 are smoothly mounted and do not interfere with each other.
As shown in fig. 1, 6 and 7, the positioning tooth block 3 is arranged at the front end of the inclined groove 101 of the base and is tightly connected with the base 1 through a screw 2, and the front end of the positioning tooth block 3 is provided with a first positioning tooth 301 which is matched with a tenon tooth of a back arc end 1101 of the turbine blade to position the clamping position of the turbine blade 11; the first locating tooth 301 of location tooth piece is equipped with two, when location tooth piece 3 was to the turbine blade clamping, the inner arc end 1102 of turbine blade was up, the fourth tenon tooth 1103 cooperation location of the first locating tooth 301 that is located the front end and turbine blade back arc end, the first locating tooth 301 that is located the rear end and the second tenon tooth 1104 cooperation location of turbine blade back arc end, still be equipped with cylindric lock 9 between the slope recess 101 of locating tooth piece 3 and base, each locating tooth piece 3 all is connected with base 1 through M6 screw 2, through cylindric lock 9 and the mode of the slope recess 101 of card income base, ensure that locating tooth piece 3 targets in place on the base.
As shown in fig. 1, 11-13, the bracket 8 is disposed at the rear end of the inclined groove 101 of the base and is fastened to the base 1 by a screw 2, the front end of the bracket 8 is provided with a notch 801, a cylindrical pin 9 is further disposed between the bracket 8 and the inclined groove 101 of the base, and the bracket 8 is reliably positioned and mounted to the base by the screw 2 of M8 and the cylindrical pin 9.
As shown in fig. 1, 8 and 9, the pressure plate 4 is disposed above the positioning tooth block 3 and the support 8, penetrates through a support notch 801 and is connected with the support 8 through a pin 5 and a retaining ring 6, the pin 5 limits the movement of the pressure plate 4 in the axial direction and the radial direction, so that the pressure plate 4 can only rotate around the center of the pin 5, the pressure plate 4 is connected with the base 1 through the support 8, thereby forming a whole, the front end of the pressure plate 4 is provided with a second positioning tooth 401, which is matched with the tenon tooth of the inner arc end 1102 of the turbine blade, the pressure plate 4 is matched with the positioning tooth block 3 for use, after the positioning tooth block 3 clamps and positions the turbine blade 11, the second positioning tooth 401 of the pressure plate presses the tenon tooth of the turbine blade downwards, tightly fixes the turbine blade, and limits the turbine blade 11 to move up; when the pressure plate 4 compresses the turbine blade 11, the second positioning teeth 401 of the pressure plate are matched and positioned with the third tenon teeth 1105 at the inner arc end of the turbine blade, the middle part of the pressure plate 4 is provided with a pin hole 402 and a yielding groove 403, the pin hole 402 is used for penetrating the pin shaft 5, the yielding groove 403 is matched and installed with the support lug 802 at the front end of the support, and the middle part of the pressure plate 4 is clamped in the notch 801 of the support.
As shown in fig. 1 and 10, the compression screw 7 is arranged at the rear end of the pressure plate 4, the compression screw 7 is provided with a threaded section and is in threaded connection with the pressure plate 4, after the compression screw 7 is screwed into a threaded hole at the rear end of the pressure plate 4, the position of the pressure plate 4 is fixed by the bracket 8 and the pin 5, at this time, the compression screw 7 is rotated to drive the pressure plate 4 to move up and down, and the second positioning teeth 401 of the pressure plate further clamp or loosen the turbine blade 11; when the compression screw 7 rotates clockwise, the pressure plate 4 moves downwards, the second positioning teeth 401 of the pressure plate clamp the turbine blades 11, when the compression screw 7 rotates anticlockwise, the pressure plate 4 moves upwards, and the second positioning teeth 401 of the pressure plate loosen the turbine blades 11;
the compression screw 7 can increase and decrease the number of rotation turns according to the abrasion loss of parts in the electric spark tool, freely adjust the clamping force of the pressure plate 4, realize the locking of the pressure plate 4 to the turbine blade 11, and solve the problem that the original electric spark tool is unstable in clamping because parts are abraded after being used.
As shown in fig. 1 and 14, the positioning pin 10 is disposed on each inclined slope 102 of the base and is in tight fit connection with the base 1, the positioning pin 10 is provided with a spherical head 1001 and contacts with a side profile 1106 of a turbine blade tenon, and the positioning block 3 and the pressure plate 4 limit the vertical movement of the turbine blade 11, so that the positioning pin 10 is designed to limit the movement of the turbine blade 11 in the left-right direction, and improve the accuracy of the clamping position of the turbine blade 11.
The invention discloses a using method of an electric spark tool for clamping turbine blades in batch, which comprises the following steps:
step 1, assembling the electric spark tool for clamping the turbine blades in batch, firstly, placing a positioning tooth block and a support in each inclined groove of a base and fixedly installing the positioning tooth block and the support by using a screw and a cylindrical pin, ensuring that the positioning tooth block and the support are installed on the base in place by the cylindrical pin, the screw and the clamping into the inclined grooves of the base, then connecting a pressure plate and the support by a pin shaft, screwing a compression screw into a threaded hole at the rear end of the pressure plate, and finally installing a positioning pin on each inclined plane of the base;
step 2: cleaning the working table surface of the electric spark forming machine, then placing an electric spark tool, aligning the parallelism between the horizontal plane of the electric spark tool and the plane of the working table and the verticality between the vertical plane of the electric spark tool and the plane of the working table within a design range after placing, and then sucking the base through an electromagnet on the working table to reliably fix the electric spark tool;
and step 3: clamping the positioning measuring rod 12 on an electric spark tool, determining the position to be machined of a lacing wire hole 1107 on each turbine blade by aligning the positioning measuring rod 12, and inputting the coordinate value corresponding to each hole in a numerical control program;
as shown in fig. 15a to 15c, the positioning gauge rod functions as a standard block, one end of the positioning gauge rod has a tooth shape identical to the shape of the tenon tooth of the turbine blade, the positioning gauge rod is mounted on an electric spark tool before the turbine blade is machined, and the position of the hole on the positioning gauge rod is the position of the lacing wire hole to be machined on the turbine blade. Before the lacing wire hole is not processed, the hole position on the positioning measuring rod is aligned, the position to be processed of the lacing wire hole on the turbine blade can be confirmed, and after the turbine blade is processed, the lacing wire hole after actual processing and the hole position on the positioning measuring rod are detected and compared by an instrument for judging whether the processing of the lacing wire hole of the turbine blade is qualified or not.
And 4, step 4: the positioning measuring rod is taken down, a turbine blade is clamped on an electric spark tool, the inner arc end of the turbine blade is upward, a fourth tenon tooth and a second tenon tooth on the back arc end of the turbine blade are respectively matched and positioned with first positioning teeth at the front end and the rear end of a positioning tooth block, the clamping position of the turbine blade is determined, after the positioning tooth block positions the turbine blade, a pressing plate is driven to move downwards by rotating a pressing screw, the third tenon tooth at the inner arc end of the turbine blade is pressed downwards by the second positioning teeth at the front end of the pressing plate, the turbine blade is positioned and clamped, the profile of one side of the tenon tooth of the turbine blade is contacted with the head of a positioning pin, and the left and right directions of;
and 5: sequentially processing the lacing wire holes, and before processing the lacing wire holes, correcting the verticality of the electrode bar to be less than or equal to
0.01mm。
In order to ensure the position degree and the inner hole roughness of the lacing wire hole, before the electric spark tool is placed on a workbench of a forming machine, the workbench surface of the electric spark forming machine needs to be cleaned in the step 2, the end surface of the tool needs to be aligned, and after the blade is installed on the electric spark tool, the lacing wire holes in the blade are in the same height and the same straight line.
Because five turbine blades are continuously machined after the electric spark tool in the embodiment is clamped once, in order to ensure that the position degree of each lacing wire hole meets the design requirement, the step 3 of clamping and positioning the measuring rod is required to be carried out after the novel electric spark tool is aligned and fixed, and the position of each turbine blade lacing wire hole is determined through the form of the alignment and positioning of the measuring rod.
In order to ensure the processing quality of the lacing wire hole, the operation of the step 5 is needed, the verticality of the electrode bar is corrected to be less than or equal to 0.01mm, and the verticality needs to be corrected again when the electrode bar is replaced every time.
The novel electric spark tool is matched with an existing AF50 electric spark forming machine of a company for use, the machining position of a first blade lacing wire hole on the leftmost side is determined before machining, and then the lacing wire holes of all the blades are machined rightwards in sequence.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (7)

1. The utility model provides an electric spark instrument of batch clamping turbine blade, places on the workstation of electric spark make-up machine for process turbine blade's lacing wire hole in batches, its characterized in that: comprises that
The base is connected with the workbench, a plurality of inclined grooves and a plurality of inclined planes are arranged at the top of the base along the front-back direction, and the inclination angle alpha of each inclined groove and each inclined plane to the horizontal plane is consistent with the inclination angle of the tenon tooth of the turbine blade, so that the turbine blade is clamped on the electric spark tool in an alpha angle;
the positioning tooth block is arranged at the front end of the inclined groove of the base and is fixedly connected with a base screw, and the front end of the positioning tooth block is provided with a first positioning tooth which is matched with a tenon tooth at the back arc end of the turbine blade to position the clamping position of the turbine blade;
the bracket is arranged at the rear end of the inclined groove of the base and is fixedly connected with the base through a screw, and a notch is formed in the front end of the bracket;
the pressure plate is arranged above the positioning tooth block and the support, penetrates through a support notch and is connected with the support through a pin shaft, a second positioning tooth is arranged at the front end of the pressure plate and is matched with a tenon tooth at the inner arc end of the turbine blade, the pressure plate is matched with the positioning tooth block for use, and after the positioning tooth block clamps and positions the turbine blade, the second positioning tooth of the pressure plate downwards presses the tenon tooth of the turbine blade to tightly fix the turbine blade and limit the turbine blade to move up and down;
the compression screw is arranged at the rear end of the pressure plate, is in threaded connection with the pressure plate, drives the pressure plate to move up and down by rotating the compression screw, and further clamps or loosens the turbine blade by the second positioning teeth of the pressure plate;
the positioning pins are arranged on each inclined plane of the base and are in tight fit connection with the base, and each positioning pin is provided with a spherical head which is in contact with a molded surface on one side of a tenon tooth of the turbine blade, so that the movement of the turbine blade in the left and right directions is limited, and the clamping position precision of the turbine blade is improved;
after the electric spark tool clamps and positions the turbine blade, the electrode rod arranged in the vertical direction of the electric spark forming machine is opposite to the processing position of the lacing hole of the turbine blade.
2. The electric spark tool for clamping turbine blades in batches as claimed in claim 1, wherein: the base is provided with five inclined grooves and five inclined planes, and each inclined groove is provided with a positioning tooth block, a support, a pressing plate and a compression screw.
3. The electric spark tool for clamping turbine blades in batches as claimed in claim 1, wherein: the first locating teeth of the locating tooth block are two, when the locating tooth block clamps the turbine blade, the first locating teeth at the front end are matched and located with the fourth tenon teeth at the back arc end of the turbine blade, and the first locating teeth at the rear end are matched and located with the second tenon teeth at the back arc end of the turbine blade.
4. The electric spark tool for clamping turbine blades in batches as claimed in claim 1, wherein: when the pressing plate compresses tightly the turbine blade, the second positioning teeth of the pressing plate are matched and positioned with the third tenon teeth at the inner arc end of the turbine blade, the middle part of the pressing plate is provided with a pin hole and a yielding groove, the pin hole is used for penetrating a pin shaft, and the yielding groove is matched and installed with a support lug at the front end of the support, so that the middle part of the pressing plate is clamped in the notch of the support.
5. The electric spark tool for clamping turbine blades in batches as claimed in claim 1, wherein: the compression screw can increase and decrease the number of rotation turns according to the abrasion loss of parts in the electric spark tool, the clamping force on the pressure plate can be freely adjusted, and the turbine blade can be locked by the pressure plate.
6. The electric spark tool for clamping turbine blades in batches as claimed in claim 1, wherein: cylindrical pins are arranged between the positioning tooth block and the base inclined groove and between the support and the base inclined groove, the positioning tooth block is reliably positioned through the cylindrical pins, the screws and the base inclined groove, and the support is reliably positioned and installed with the base through the screws and the cylindrical pins.
7. The use method of the electric spark tool for clamping the turbine blades in batch is characterized by comprising the following steps of:
step 1, assembling the electric spark tool for clamping turbine blades in batch as claimed in any one of claims 1 to 6, firstly, placing a positioning tooth block and a support in each inclined groove of a base and fixedly installing the positioning tooth block and the support by using a screw and a cylindrical pin, ensuring that the positioning tooth block and the support are installed on the base in place by the cylindrical pin, the screw and the clamping into the inclined groove of the base, then connecting a pressure plate and the support by a pin shaft, screwing a compression screw into a threaded hole at the rear end of the pressure plate, and finally installing a positioning pin on each inclined plane of the base;
step 2: cleaning the working table surface of the electric spark forming machine, then placing an electric spark tool, aligning the parallelism between the horizontal plane of the electric spark tool and the plane of the working table and the verticality between the vertical plane of the electric spark tool and the plane of the working table within a design range after placing, and then sucking the base through an electromagnet on the working table to reliably fix the electric spark tool;
and step 3: clamping the positioning measuring rod on an electric spark tool, determining the position to be machined of the lacing wire hole on each turbine blade by aligning the positioning measuring rod, and inputting the coordinate value corresponding to each hole in a numerical control program;
and 4, step 4: the positioning measuring rod is taken down, a turbine blade is clamped on an electric spark tool, the inner arc end of the turbine blade is upward, a fourth tenon tooth and a second tenon tooth on the back arc end of the turbine blade are respectively matched and positioned with first positioning teeth at the front end and the rear end of a positioning tooth block, the clamping position of the turbine blade is determined, after the positioning tooth block positions the turbine blade, a pressing plate is driven to move downwards by rotating a pressing screw, the third tenon tooth at the inner arc end of the turbine blade is pressed downwards by the second positioning teeth at the front end of the pressing plate, the turbine blade is positioned and clamped, the profile of one side of the tenon tooth of the turbine blade is contacted with the head of a positioning pin, and the left and right directions of;
and 5: and (4) sequentially processing the lacing wire holes, wherein before the lacing wire holes are processed, the verticality of the electrode bar needs to be corrected to be less than or equal to 0.01 mm.
CN202011153320.2A 2020-10-26 2020-10-26 Electric spark tool for clamping turbine blades in batch and using method thereof Pending CN112157323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011153320.2A CN112157323A (en) 2020-10-26 2020-10-26 Electric spark tool for clamping turbine blades in batch and using method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011153320.2A CN112157323A (en) 2020-10-26 2020-10-26 Electric spark tool for clamping turbine blades in batch and using method thereof

Publications (1)

Publication Number Publication Date
CN112157323A true CN112157323A (en) 2021-01-01

Family

ID=73866219

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011153320.2A Pending CN112157323A (en) 2020-10-26 2020-10-26 Electric spark tool for clamping turbine blades in batch and using method thereof

Country Status (1)

Country Link
CN (1) CN112157323A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112620838A (en) * 2021-03-10 2021-04-09 成都和鸿科技有限公司 Integral machining method for guide vane basin dorsal sealing groove
CN116587088A (en) * 2023-06-01 2023-08-15 浙江科特泵业有限公司 Polishing device for impeller and application method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112620838A (en) * 2021-03-10 2021-04-09 成都和鸿科技有限公司 Integral machining method for guide vane basin dorsal sealing groove
CN112620838B (en) * 2021-03-10 2021-06-25 成都和鸿科技有限公司 Integral machining method for guide vane basin dorsal sealing groove
CN116587088A (en) * 2023-06-01 2023-08-15 浙江科特泵业有限公司 Polishing device for impeller and application method thereof
CN116587088B (en) * 2023-06-01 2023-10-03 浙江科特泵业有限公司 Polishing device for impeller and application method thereof

Similar Documents

Publication Publication Date Title
CN112157323A (en) Electric spark tool for clamping turbine blades in batch and using method thereof
CN103846706B (en) The special stretching device of a kind of blade parts milling
CN213318165U (en) Electric spark tool for clamping turbine blades in batches
CN110315359B (en) Low-pressure turbine guide blade tool structure and adjusting method
CN105081691A (en) Machining method for moving blade with tooth-form arc on rhombus face of blade root
CN112857280A (en) Tool of measuring machine for rotor blade of aircraft engine and coordinate system establishing method thereof
CN104858682A (en) Double-arm self-adapting fixture used for controlling machining deformation of blade
CN101396795A (en) Camshaft flank hole processing clamp
CN111390256A (en) Connecting rod I-shaped groove machining process and non-standard cutter
CN1583357A (en) Machining clamp for engine and flyball
CN112059562A (en) Production process of moving blade without crown
CN216989960U (en) Machining tool for testing hole of rectifier blade of interstage casing of aero-engine
CN206153957U (en) Y -type blade root anchor clamps
CN110977070B (en) Fixing device and method for blade tenon in linear cutting
CN210648885U (en) Aeroengine wheel disk mortise linear cutting indexing fixture
CN212683181U (en) Fixing clamp for processing turbine rotor blade
CN201295844Y (en) Camshaft side hole machining jig
CN209465789U (en) A kind of wire cutting thin-walled ring parts replacer
CN209408063U (en) The indexing fixture of effusion wall processing
CN103737028B (en) A kind of shift sleeve structure of machine tool chief axis
CN207256077U (en) Clamping jig
CN216966988U (en) Machining clamp capable of adjusting levelness and rotation degree of workpiece
CN220660021U (en) Special fixture for processing graphite blades
CN215509356U (en) Electrode device is changed to electric spark
CN212762212U (en) Clamp for processing angle surface of reaction rod support

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination