CN114226894A

CN114226894A - Electrode tool setting method for machining turbine blade and electrode connecting piece

Info

Publication number: CN114226894A
Application number: CN202210165203.0A
Authority: CN
Inventors: 姜涛; 郑珂; 张爱民; 杨恒
Original assignee: Chengdu Hehong Technology Co ltd
Current assignee: Chengdu Hehong Technology Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-03-25
Anticipated expiration: 2042-02-23
Also published as: CN114226894B

Abstract

The invention relates to the technical field of turbine blade machining, in particular to an electrode tool setting method and an electrode connecting piece for turbine blade machining. The master piece is provided with a sealing groove identical to the turbine blade. When the standard sample piece is fixed on the processing table, the position of the sealing groove of the standard sample piece corresponds to the position of the sealing groove of the turbine blade when the turbine blade is placed on the processing table. The electrodes are then placed in the sealed grooves of the standard sample. The spindle of the machine tool is then moved to the electrode and the electrode is secured to the spindle. The standard sample piece is processed in advance. When the standard sample piece is placed on the processing platform, the position of the sealing groove of the standard sample piece is the same as the position of the sealing groove of the turbine blade when the turbine blade is placed on the processing platform. At the moment, the electrode is placed in the sealing groove of the standard sample piece, so that the electrode can be located at the correct processing position. And moving the main shaft of the machine tool to the electrode, wherein the position of the electrode fixed on the main shaft is the position of the main shaft during the electric pulse processing. And the tool setting efficiency is improved.

Description

Electrode tool setting method for machining turbine blade and electrode connecting piece

Technical Field

The invention relates to the technical field of turbine blade machining, in particular to an electrode tool setting method and an electrode connecting piece for turbine blade machining.

Background

In an aircraft engine, a turbine is generally formed by splicing a plurality of turbine blades into a circular ring shape. The abutting positions of two adjacent turbine blades need to be processed with strip-shaped sealing grooves. The shape of the sealing groove is various. It may be linear or curved or dog-leg. The machining of the sealing groove is generally carried out by adopting a pulse forming machine tool. Specifically, the workpiece is fixed to a placing table of a machine tool. And then moving the spindle head so that the electrode arranged on the spindle head moves to the workpiece and processes the workpiece. The shape of the electrode corresponds to the shape of the sealing groove, so that the shape of the sealing groove after electric pulse machining is the same as the shape of the electrode, namely the shape of the sealing groove after electric pulse machining is the same as the designed shape of the sealing groove. In this process, the tool setting of the electrode is manually performed according to measurement, experience and the like. After the sealing groove of the machined part is machined, the machined sealing groove needs to be measured. If the position of the sealing groove is not accurate, the position of the electrode needs to be finely adjusted and then the processing is carried out. Repeated machining and electrode position adjustment can make the processing position in groove of obturating accurate, and then make the tool setting accomplish.

The tool setting method in the prior art is complex in process and multiple in manual operation steps. Meanwhile, the rejection rate is increased due to inaccurate tool setting processing for multiple times. Meanwhile, the tool setting method has high requirements on workers.

Disclosure of Invention

The invention aims to provide an electrode tool setting method for machining a turbine blade, which can conveniently perform tool setting and improve the tool setting efficiency.

The embodiment of the invention is realized by the following technical scheme:

a method for setting tool of electrode for machining turbine blade includes fixing standard sample on machining table of machine tool; the standard sample piece is provided with a sealing sample groove; the sealing sample groove is the same as the sealing groove of the turbine blade; when the standard sample piece is fixed on the processing platform, the position of the sealing sample groove corresponds to the position of the sealing groove when the turbine blade is placed on the processing platform; then, placing an electrode in a sealing groove of the standard sample piece; the spindle of the machine tool is then moved to the electrode and the electrode is secured to the spindle.

Further, when the standard sample piece is fixed to the machining table, the position of the sealing sample groove is the same as the position of the sealing groove when the turbine blade is placed on the machining table.

Further, the depth of the sealing sample groove is larger than 5 mm.

Further, the master piece is provided with a clamping portion identical to the turbine blade.

The electrode connecting piece is characterized in that the main shaft and the electrode are connected through the connecting piece. The connecting piece is provided with a connector connected with the main shaft and a chuck for clamping the electrode; the chuck is arranged in cooperation with the electrode.

Further, the connecting piece also comprises a connecting rod; the connecting head and the chuck are arranged on two opposite sides of the connecting rod and are respectively positioned at two ends of the connecting rod; the connecting rod is provided with a waist-shaped hole; the chuck is connected with a connecting rod; the connecting rod penetrates through the waist-shaped hole; the connecting rod is provided with a nut in a matching way, so that the connecting rod is fixed on the connecting rod through the nut.

Further, the connecting rod is in a stepped shaft shape; the small-diameter section of the connecting rod is cylindrical; the small-diameter section of the connecting rod is inserted into the waist-shaped hole and extends to the other end of the waist-shaped hole; the nut is arranged at one end of the connecting rod extending out of the waist-shaped hole; the outer diameter of the large-diameter section of the connecting rod is larger than the width of the kidney-shaped hole.

Further, the chuck comprises two clamping pieces which are oppositely arranged; a clamping gap is arranged between the two clamping pieces; the clamping piece is provided with a fastening screw; one end of the fastening screw is arranged on the outer side of the clamping piece, and the other end of the fastening screw penetrates through the clamping piece and extends into the clamping gap.

Furthermore, a plurality of fastening screws are uniformly distributed on the clamping piece.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

the electrode tool setting method for machining the turbine blade carries out tool setting through the standard sample piece. Specifically, the standard sample is machined in advance. When the standard sample piece is placed on the processing platform, the position of the sealing sample groove is the same as the position of the sealing groove when the turbine blade is placed on the processing platform. At the moment, the electrode is placed in the sealing sample groove, so that the electrode is positioned at the correct processing position. And moving the main shaft of the machine tool to the electrode and fixing the electrode on the main shaft. The machine tool records the position at this time, namely the position of the main shaft in the electric pulse processing.

In this way, the electrodes can be positioned quickly. And after the connection between the main shaft and the electrode is finished, the position of the main shaft is the position of the main shaft in the electric pulse processing. Thereby completing the tool setting quickly. By adopting the tool setting mode, different trial machining parts do not need to be processed for tool setting for many times, and waste caused by trial machining is avoided. Meanwhile, whether the position of the sealing groove subjected to trial machining is accurate or not does not need to be measured repeatedly by a worker, and the tool setting efficiency is greatly improved. This also reduces the need for workers to set the tool.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a turbine blade machined in accordance with the present invention;

FIG. 2 is a schematic view of an electrode connection;

fig. 3 is a schematic view of the connection rod and the connecting rod.

Icon: 1-turbine blade, 11-sealing groove, 2-connector, 3-chuck, 31-clamping piece, 32-fastening screw, 4-electrode, 5-connecting rod, 51-kidney-shaped hole, 6-connecting rod, 61-nut and 7-main shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

FIG. 1 is a schematic view of a turbine blade machined in accordance with the present invention. The invention provides an electrode tool setting method for machining a turbine blade, which is used based on an electric pulse forming machine tool. The electric pulse forming machine includes a processing table and a spindle 7. The processing platform is used for placing processed workpieces to be processed. The spindle 7 can move relative to the processing table, so that the spindle 7 moves to the workpiece to be processed and processes the workpiece to be processed. Electrode 4 tool setting method first the standard sample piece is fixed to the machining table of the machine tool. The electrode 4 is then placed in the sealed sample well of the standard sample. The spindle 7 of the machine tool is then moved to the electrode 4 and the electrode 4 is fixed to the spindle 7. After the electrode 4 is fixed on the main shaft 7, the machine tool is controlled to record the current position of the main shaft 7.

The standard sample piece is a reference piece processed in advance. Which can be precisely machined by a milling machine or the like. The sealing sample grooves of the standard sample pieces are the same as the sealing grooves 11 of the turbine blade 1. The shape of the standard sample piece can be any shape as long as the standard sample piece is fixed on the processing platform, and the position of the sealing sample groove of the standard sample piece corresponds to the position of the sealing sample groove 11 of the turbine blade 1 when the standard sample piece is placed on the processing platform. Specifically, when the standard sample piece is fixed to the machining table, the position of the sealing sample groove of the standard sample piece may be the same as the position of the sealing sample groove 11 of the turbine blade 1 when the standard sample piece is placed on the machining table. This allows the position of the main shaft 7 at which the electrode 4 is fixed to the main shaft 7 to be the position of the main shaft 7 at which the turbine blade 1 is machined; when the standard sample piece is fixed on the processing platform, the position of the sealing sample groove of the standard sample piece can also be different from the position of the sealing groove 11 of the turbine blade 1 when the turbine blade is placed on the processing platform by a fixed value. This causes the position of the main shaft 7 to be shifted in a fixed direction by a fixed value when the electrode 4 is fixed to the main shaft 7, that is, the position of the main shaft 7 when the turbine blade 1 is machined.

The electrode tool setting method for machining the turbine blade carries out tool setting through the standard sample piece. Specifically, the standard sample is machined in advance. When the standard sample piece is placed on the processing platform, the position of the sealing sample groove is the same as the position of the sealing groove 11 when the turbine blade 1 is placed on the processing platform. At this time, the electrode 4 is placed in the sealed sample groove of the standard sample piece, so that the electrode 4 is located at the correct processing position. The spindle 7 of the machine tool is moved to the electrode 4 and the electrode 4 is fixed to the spindle 7.

In this way, the electrode 4 can be positioned quickly. After the spindle 7 and the electrode 4 are connected, the position of the spindle 7 is the position of the spindle 7 during the electric pulse processing, or the spindle 7 is moved to the position of the spindle 7 during the electric pulse processing by moving the spindle 7 in a fixed direction by a fixed value. Thereby completing the tool setting quickly. By adopting the tool setting mode, different trial machining parts do not need to be processed for tool setting for many times, and waste caused by trial machining is avoided. Meanwhile, whether the position of the sealing groove 11 which is subjected to trial machining is accurate or not does not need to be measured repeatedly by workers, and the tool setting efficiency is greatly improved. This also reduces the need for workers to set the tool.

In this embodiment, the depth of the tight sealing sample groove of the standard sample piece is greater than 5 mm. Specifically, the depth of the sealing sample groove of the standard sample piece is 5mm-10 mm. In practice, the width of the sealing groove 11 after electric pulse machining is slightly larger than the thickness of the electrode 4. The difference between the two is about 0.5 mm. The depth of the electrode 4 inserted into the sealing sample groove of the standard sample piece is 5mm-10mm, so that the deviation of the whole electrode 4 relative to the accurate position is very small after the electrode 4 deviates 0.5mm from the opening of the sealing sample groove. And then fine assurance electrode 4 pegs graft in the accuracy nature of 4 positions of electrode when the tight appearance groove of standard appearance spare, guarantee the accuracy of tool setting.

In the present embodiment, the master is provided with the same clamping portion as the turbine blade 1. This enables the master piece and turbine blade 1 to be clamped to the machining station by the same clamp. So that the position of the seal pattern groove of the standard sample piece relative to the jig is the same as the position of the seal pattern groove 11 of the turbine blade 1 relative to the jig. And further, errors caused by different position references of the sealing grooves 11 of the standard sample piece and the turbine blade 1 due to the fact that different clamps clamp the standard sample piece and the turbine blade 1 respectively are avoided. The tool setting precision of the electrode 4 is ensured.

An electrode connecting member is used for connecting a main shaft 7 and an electrode 4. As shown in fig. 2 and 3, the connecting member is provided with a connecting head 2 connecting the spindle 7 and a chuck 3 holding the electrode 4. The connector 2 is connected by clamping the main shaft 7, and the main shaft 7 can be fixed inside the connector 2 by interference fit. The chuck 3 is arranged in cooperation with the electrode 4. Specifically, since the shape of the sealing groove 11 is different from one another and the shape of the electrode 4 is different from one another, the collet 3 is provided in a plurality of shapes in cooperation with the electrode 4.

In use, the spindle 7 is moved to the electrode 4 so that the chuck 3 clamps and fixes the electrode 4. Since the connection piece is fixed to the spindle 7 by means of the connection head 2, this also results in the electrode 4 being fixed to the spindle 7.

In this embodiment, the connector further comprises a connecting rod 5. The connecting head 2 and the clamping head 3 are arranged on two opposite sides of the connecting rod 5 and are respectively positioned at two ends of the connecting rod 5. When in specific use, the connector 2 is upwards connected with the main shaft 7; the chuck 3 is connected downward to the electrode 4. The connecting rod 5 is provided with a kidney-shaped hole 51. The kidney-shaped hole 51 extends in the longitudinal direction of the connecting rod 5. The chuck 3 is connected with a connecting rod 6. The connecting rod 6 is arranged through the waist-shaped hole 51. So that the link 6 can slide with respect to the kidney hole 51. Thereby facilitating the chuck 3 to follow the connecting rod 6 and clamp the electrode 4. Facilitating the connection of the electrode 4 to the spindle 7. The connecting rod 6 is fittingly provided with a nut 61 so that the connecting rod 6 is fixed to the connecting rod 5 by the nut 61. Specifically, the link 6 is stepped shaft-shaped. The small diameter section of the connecting rod 6 is cylindrical. The small diameter section of the connecting rod 6 is inserted into the kidney-shaped hole 51 and extends to the other end of the kidney-shaped hole 51. The nut 61 is provided at one end of the link 6 extending out of the kidney hole 51. The outer diameter of the large diameter section of the connecting rod 6 is larger than the width of the kidney-shaped hole 51. After the position of the connecting rod 6 relative to the kidney-shaped hole 51 is adjusted, the connecting rod 5 can be clamped through the nut 61 and the large-diameter section of the connecting rod 6, and then the chuck 3 and the connecting rod 5 are quickly connected.

In this embodiment, the chuck 3 includes two jaws 31 disposed opposite to each other. A clamping gap is provided between the two clamping pieces 31 for placing the electrode 4. The clip 31 is provided with a fastening screw 32. One end of the fastening screw 32 is disposed outside the clamping piece 31, and the other end penetrates the clamping piece 31 and extends into the clamping gap. The electrode 4 is fixed between the two jaws 31 by tightening the screw 32.

In this embodiment, a plurality of fastening screws 32 are uniformly distributed on the clamping piece 31. There are various shapes of the electrodes 4. The depth of the fastening screws 32 extending into the space between the two clamping pieces 31 is adjusted so that the fastening screws 32 are all just attached to the surface of the electrode 4 and clamp the electrode 4.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The electrode tool setting method for machining the turbine blade is characterized by comprising the following steps of: firstly, fixing a standard sample piece on a processing table of a machine tool; then, an electrode (4) is placed in a sealed sample groove of the standard sample piece; subsequently moving the spindle (7) of the machine tool to the electrode (4) and fixing the electrode (4) to the spindle (7); the sealing sample groove is the same as a sealing groove (11) of the turbine blade (1); when the standard sample piece is fixed on the processing table, the position of the sealing sample groove corresponds to the position of the sealing groove (11) when the turbine blade (1) is placed on the processing table.

2. The method for machining the blade of the turbine as claimed in claim 1, wherein the method comprises the following steps: when the standard sample piece is fixed to the processing platform, the position of the sealing sample groove is the same as the position of the sealing groove (11) of the turbine blade (1) when the turbine blade is placed on the processing platform.

3. The method for machining the blade of the turbine as claimed in claim 1, wherein the method comprises the following steps: the depth of the sealing sample groove is larger than 5 mm.

4. The method for machining the blade of the turbine as claimed in claim 1, wherein the method comprises the following steps: the standard sample piece is provided with a clamping part identical to the turbine blade (1).

5. An electrode attachment for use in conjunction with the electrode gauging method for machining turbine blades as claimed in any one of claims 1 to 4, wherein: the main shaft (7) is connected with the electrode (4) through a connecting piece; the connecting piece is provided with a connector (2) connected with the main shaft (7) and a chuck (3) for clamping the electrode (4); the clamping head (3) is matched with the electrode (4) for arrangement.

6. The electrode connection member according to claim 5, wherein: the connecting piece also comprises a connecting rod (5); the connector (2) and the chuck (3) are arranged on two opposite sides of the connecting rod (5) and are respectively positioned at two ends of the connecting rod (5); the connecting rod (5) is provided with a waist-shaped hole (51); the chuck (3) is connected with a connecting rod (6); the connecting rod (6) penetrates through the waist-shaped hole (51); the connecting rod (6) is provided with a nut (61) in a matching mode, so that the connecting rod (6) is fixed on the connecting rod (5) through the nut (61).

7. The electrode connection member according to claim 6, wherein: the connecting rod (6) is in a stepped shaft shape; the small-diameter section of the connecting rod (6) is cylindrical; the small-diameter section of the connecting rod (6) is inserted into the waist-shaped hole (51) and extends to the other end of the waist-shaped hole (51); the nut (61) is arranged at one end of the connecting rod (6) extending out of the waist-shaped hole (51); the outer diameter of the large-diameter section of the connecting rod (6) is larger than the width of the kidney-shaped hole (51).

8. The electrode connection according to claim 7, wherein: the clamping head (3) comprises two clamping pieces (31) which are oppositely arranged; a clamping gap is arranged between the two clamping pieces (31); the clamping piece (31) is provided with a fastening screw (32); one end of the fastening screw (32) is arranged outside the clamping piece (31), and the other end penetrates through the clamping piece (31) and extends into the clamping gap.

9. The electrode connection member according to claim 8, wherein: a plurality of fastening screws (32) are uniformly distributed on the clamping piece (31).