CN115781439A

CN115781439A - Processing device for circular boss in curved surface

Info

Publication number: CN115781439A
Application number: CN202211538412.1A
Authority: CN
Inventors: 张旭洲; 和秋香; 韩丹; 龙尚勇; 陈涛
Original assignee: Guiyang Hangfa Precision Casting Co Ltd
Current assignee: Guiyang Hangfa Precision Casting Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-03-14

Abstract

The invention relates to a processing device for a circular boss in a curved surface, which comprises: the base comprises a bottom plate and a supporting plate which is perpendicular to the bottom plate, and the supporting plate and the bottom plate are both provided with positioning parts for positioning a workpiece; the pressing part is used for pressing a workpiece, and the pressing part and the base are relatively fixed; still include the emery wheel, be provided with the processing recess on the emery wheel. The machined part adds man-hour, install on the base through locating component and pressing part between the machined part, after fixing the machined part, the operation emery wheel rotates, is provided with the processing recess on the emery wheel, the processing recess can direct processing the machined part that has been fixed well to the processing recess on the emery wheel can direct processing boss, can one shot forming, can not have the problem of many times trade face processing, the part burr of the processing of having solved present machined part appearance is great, the problem of the good and unstable worker size of machined surface quality.

Description

Device for processing circular boss in curved surface

Technical Field

The invention relates to machining of a high-temperature alloy turbine working blade of an aeroengine, in particular to a machining device for a circular boss in a curved surface.

Background

The aeroengine turbine blade is facing the processing technology of processing the boss of perpendicular face on the circle in the major radius, adopts milling process mostly, milling process is through earlier through horizontal milling machine processing boss both sides, and interior circular arc radius, processing boss top surface through flat grinder, owing to receive the influence of processing method, milling process's surplus is great, receives the influence of processing method, and the part burr that leads to processing is great, and the processing surface quality is not good, and trade a lot of face processing and can lead to the machining size unstability.

Disclosure of Invention

The invention aims to solve the technical problem of providing a processing device of a curved surface inner circular boss, which is used for solving the problems of large part burrs, poor processing surface quality and unstable working size in the processing process of the conventional curved surface inner circular boss due to multiple surface changing processing.

The technical scheme for solving the technical problems is as follows: the utility model provides a processingequipment of boss in curved surface, its characterized in that includes: the base comprises a bottom plate and a supporting plate which is perpendicular to the bottom plate, and the supporting plate and the bottom plate are both provided with positioning parts for positioning a workpiece; the pressing part is used for pressing a workpiece, and the pressing part and the base are relatively fixed; still include the emery wheel, be provided with the processing recess on the emery wheel.

The invention has the beneficial effects that: the machined part adds man-hour, install on the base through locating component and pressing part between the machined part, after fixing the machined part, the operation emery wheel rotates, is provided with the processing recess on the emery wheel, the processing recess can direct processing the machined part that has been fixed well to the processing recess on the emery wheel can direct processing boss, can one shot forming, can not have the problem of many times trade face processing, the part burr of the processing of having solved present machined part appearance is great, the problem of the good and unstable worker size of machined surface quality.

On the basis of the technical scheme, the invention can be improved as follows.

Furthermore, in order to fix the three degrees of freedom of machined part, the positioning component comprises a positioning block and a positioning pin, the positioning block is fixedly arranged on the supporting plate in a three-dimensional mode, and the distance between the three positioning blocks is different relative to the bottom plate.

Further, for with the fixed adaptation of machined part, better fixed machined part is provided with the boss with the machined part adaptation on the locating piece.

Further, in order to fix two other degrees of freedom of the machined part, the positioning pin comprises a first positioning pin, a second positioning pin and a third positioning pin, the first positioning pin and the second positioning pin are installed on the supporting plate and close to the positioning block, and the third positioning pin is installed on the bottom plate and close to the supporting plate.

Furthermore, in order to facilitate installation of the third positioning pin, a support is arranged on the bottom plate and perpendicular to the surface of the bottom plate, and the third positioning pin is installed on the support.

Further, in order to fix the last degree of freedom of the workpiece, the pressing part comprises a mounting frame and a pressing plate used for pressing the workpiece, the mounting frame is fixedly arranged relative to the base, the handle nut is in threaded connection with the mounting frame, and one end, far away from the mounting frame, of the handle nut can press the pressing plate.

Further, in order to compress tightly the clamp plate, be connected with first bolted connection pole and second bolted connection pole on the support, first bolted connection pole threaded connection is in the clamp plate, and the one end that first bolted connection pole was kept away from to the clamp plate is provided with the recess of detaining with second bolted connection pole tip adaptation, and second bolted connection pole tip is provided with the retaining member, and second bolted connection pole compresses tightly the clamp plate through screwing up the retaining member.

Furthermore, in order to ensure the adaptation between the pressing plate and the workpiece, a pressing block adapted to the step of the workpiece is arranged at the center of the pressing plate, and the pressing block is rotatably connected with the pressing plate through a shaft pin.

Furthermore, the grinding wheel is installed on a grinding wheel installation frame of the device, and the grinding wheel installation frame and the base are fixedly arranged relatively.

Further, the machining grooves are arranged as right-angled grooves.

The beneficial effect of adopting the above further scheme is: according to the invention, the forming grinding wheel with the right-angle edge is designed, and the two right-angle edges and the boss corner are designed into one forming grinding wheel for one-step forming processing, so that the consistency of the product quality is ensured, the fluctuation of the product quality caused by manual clamping is reduced, and the processing efficiency of the product is improved.

Drawings

FIG. 1 is a schematic side view of an embodiment of the present invention;

FIG. 2 is a schematic top view structure provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic front view of the machining of a workpiece according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-base, 101-bottom plate, 102-supporting plate, 103-ribbed plate, 2-positioning block, 3-handle nut, 4-grinding wheel, 5-first positioning pin, 6-second positioning pin, 7-third positioning pin, 8-support, 9-processing groove, 10-first bolt connecting rod, 11-second bolt connecting rod, 12-shaft pin, 13-mounting frame, 14-locking piece, 15-pressing plate, 16-pressing block and 17-processing piece.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

Example 1

A device for machining a circular boss in a curved surface, as shown in fig. 1 to 3, comprising: the device comprises a base 1, wherein the base 1 comprises a bottom plate 101 and a supporting plate 102 arranged perpendicular to the bottom plate 101, and positioning parts for positioning a workpiece 17 are arranged on the supporting plate 102 and the bottom plate 101; the pressing part is used for pressing a workpiece 17 and is relatively fixed with the base 1; still include emery wheel 4, be provided with processing recess 9 on emery wheel 4. The machined part 17 is adding man-hour, install on base 1 through locating component and the part that compresses tightly between the machined part 17, after fixing machined part 17, operation emery wheel 4 rotates, be provided with processing groove 9 on the emery wheel 4, processing groove 9 can direct processing machined part 17 fixed, and processing groove 9 on the emery wheel 4 can the direct processing boss, can one shot forming, can not have the problem of trade a lot of face processing, it is great to have solved the part burr of the processing that current machined part 17 appears, the problem of the good and work size unstable of processing surface quality. And a rib plate 103 is arranged between the bottom plate 101 and the supporting plate 102 to reinforce the supporting force of the base 1.

In the present embodiment, in order to fix six degrees of freedom of the workpiece 17, the positioning component includes three positioning blocks 2 and positioning pins, the three positioning blocks 2 are fixedly disposed on the support plate 102, and the distances of the three positioning blocks 2 relative to the bottom plate 101 are different. The positioning block 2 is provided with a boss matched with the workpiece 17. The locating pin includes first locating pin 5, second locating pin 6 and third locating pin 7, and first locating pin 5 and second locating pin 6 are installed in the position that is close to locating piece 2 on backup pad 102, and third locating pin 7 is installed on bottom plate 101 and is close to the setting of backup pad 102. The vertical bottom plate 101 face on the bottom plate 101 is provided with a support 8, and the third positioning pin 7 is installed on the support 8. The pressing part comprises a mounting frame 13 and a pressing plate 15 for pressing a workpiece 17, the mounting frame 13 is fixedly arranged relative to the base 1, and the pressing plate 15 is connected to the mounting frame 13 through a handle nut 3. The three positioning pins are generally designed according to the machined part to be machined, so that the position of the machined part can be stably positioned.

In this embodiment, in order to ensure that the pressing plate 15 does not rotate when the handle nut 3 rotates, the pressing plate 15 is pressed against the end of the handle nut 3 away from the mounting bracket 13. In order to ensure the matching between the pressing plate 15 and the workpiece 17, a pressing block 16 matched with the step of the workpiece 17 is arranged at the central position on the pressing plate 15. In order to fix the last degree of freedom of the workpiece 17, the pressing part comprises a mounting frame 13 and a pressing plate 15 for pressing the workpiece 17, the mounting frame 13 is fixedly arranged relative to the base 1, the handle nut 3 is in threaded connection with the mounting frame 13, and one end of the handle nut 3, which is far away from the mounting frame 13, can press the pressing plate 15. In order to compress the pressing plate 15, the support 8 is connected with a first bolt connecting rod 10 and a second bolt connecting rod 11, the first bolt connecting rod 10 is connected with the pressing plate 15 in a threaded mode, one end, far away from the first bolt connecting rod 10, of the pressing plate 15 is provided with a groove buckle matched with the end portion of the second bolt connecting rod 11, the end portion of the second bolt connecting rod 11 is provided with a locking piece 14, and the second bolt connecting rod 11 compresses the pressing plate 15 through screwing the locking piece 14. In order to ensure the matching between the pressing plate 15 and the workpiece 17, a pressing block 16 matched with the step of the workpiece 17 is arranged at the central position on the pressing plate 15, and the pressing block 16 is rotatably connected with the pressing plate 15 through a shaft pin 12. The grinding wheel 4 is installed on a grinding wheel installation frame of the device, and the grinding wheel installation frame and the base 1 are oppositely and fixedly arranged. The machining grooves 9 are arranged as right-angled grooves. The locking member 14 is threadedly coupled to the end of the second bolt connecting shaft 11 to be tightened and loosened. The end part of the second bolt connecting rod 11 can be directly clamped into the groove buckle, so that the connection is convenient. The connecting fingers comprise fixed connection and movable connection, wherein the second bolt connecting rod 11 is arranged on a base arranged on the support 102 and is connected with the support through a bolt or a ball to form movable connection with the support; the first bolt-connecting rod 10 may be configured as a nut connection, forming a fixed connection with the support.

Example 2

The using steps and the method of the device are as follows: the invention adopts the technical scheme that a clamp for positioning a creep feed grinding machine and a formed grinding wheel 4 for processing a boss of a large circular arc inner straight surface are designed, a workpiece 17 is clamped on the clamp, the grinding wheel 4 is trimmed by designing the grinding wheel 4, and the surface of the boss of the workpiece 17 is processed by the formed grinding wheel 4. The method comprises the following specific steps:

1. the structural characteristics of the workpiece 17 are researched, a fixture for positioning the creep feed grinding machine is designed, and the characteristics of large and small mounting plates at the rear edge of the workpiece 17 are utilized to arrange the positioning block 2 to position and limit two rotations and one movement of the workpiece 17 to three degrees of freedom. Two points of the excircle of the large mounting plate at the rear edge are used for positioning, and one rotation, one movement and two degrees of freedom are limited by positioning pins. The basin is positioned towards the end face of the large mounting plate to limit movement and have one degree of freedom. The requirement of six-point positioning is achieved.

2. The forming grinding wheel 4 is designed according to the structure of the boss with the large circular arc radius, the inner circle and the straight edge of the large mounting plate. The same angle of the inner circular arc design of the mounting plate and the machined part 17 can be 86 degrees +/-30', the transfer rounding of the boss and the inner circular arc design is R0.2 +/-0.01, and the two sides of the boss are designed to be right-angled sides.

3. And clamping the workpiece 17 on a clamp, positioning by a large mounting plate and a small mounting plate at the rear edge of the workpiece 17, positioning two points of the excircle of the large mounting plate at the rear edge, positioning a basin to one point of the large mounting plate, and compressing the blade body at the front edge.

4. Parameter selection: by utilizing the characteristics of the creep feed grinding machining, through tests, parameters of the creep feed grinding machining are finally determined: cooling pressure: not less than 0.6MPa; cutting linear velocity: v =18m/s; feeding speed: s =250mm/min; cutting depth: rough grinding t1=1.2mm, finish grinding t2=0.15mm, finish grinding t3=0.1mm.

5. And (3) trimming the grinding wheel 4, and trimming the formed grinding wheel 4 by using the grinding wheel 4, wherein the trimming amount of the grinding wheel 4 is 0.1mm when the grinding wheel 4 is trimmed each time, so that the grinding wheel 4 is prevented from being broken in the trimming process.

6. The trimmed profile grinding wheel 4 is used to machine the inner circular vertical boss of the workpiece.

The invention aims to solve the processing technique method and the forming roller and the device of the boss with the inner circular straight edge on the large circular arc radius of the turbine workpiece 17 of the aero-engine, and the processing method aims to solve the problem of processing the inner circular straight edge of the turbine workpiece 17 by designing a forming grinding wheel 4 and a special clamp for slow-feed grinder processing, finishing the forming grinding wheel 4 through the forming grinding wheel 4, setting reasonable processing parameters and processing the inner circular boss on the large circular arc radius through the forming grinding wheel 4.

This machined part 17 is in the production process, and the processing of the right angle limit boss on the cambered surface in the large radius of complicated hollow turbine blade mounting panel adopts horizontal milling machine mostly, adopts the corner radius between milling cutter processing boss both ends face and the inner circular arc, and rethread flat grinder boss top surface processing boss top surface, and two processes reach the processing requirement. According to the invention, the forming grinding wheel 4 with the right-angle side is designed, and one forming grinding wheel 4 is designed for the corners between the two right-angle sides and the large circular arc on the top surface of the boss and the boss, so that the consistency of product quality is ensured, the fluctuation of product quality caused by manual clamping is reduced, and the processing efficiency of the product is improved.

The workpiece 17 described above is provided as a processing blade in the present embodiment.

The use principle is as follows: the fixture mainly adopts a base, a supporting plate 102 is fixed on the base, three positioning blocks 2 are fixed on the supporting plate 102 to limit two rotations and one movement, three degrees of freedom are provided in total, a first positioning pin 5 and a second positioning pin 6 limit one rotation and one movement, two degrees of freedom are limited, a third positioning pin 7 limits one movement and one degree of freedom is limited, the six-point positioning effect is achieved, a pressing block 16 is adopted to press a workpiece, and a handle nut 3 is screwed to achieve the pressing effect.

The base and the support plate 102 are fixed by screws. Defining a process hole in the support plate 102 at a suitable location; three positioning blocks 2 are fixed on the supporting plate 102 by adopting countersunk screws, steps between the positioning blocks 2 are calculated according to theoretical values of step differences between workpieces, and the step difference between a large mounting plate and a small mounting plate is designed to be the theoretical step difference of 6mm, so that the step difference between the theoretical large mounting plate and the theoretical small mounting plate can be ensured to be on the same plane, a more stable plane can be positioned, and three degrees of freedom are limited; two pins with the diameter of 20mm are made on the supporting plate 102, the shortest distance between the outer circles of the first positioning pin 5 and the second positioning pin 6 and the process hole is 151mm, the first positioning pin 5 and the second positioning pin 6 which limit the outer circle of the workpiece are achieved, and two degrees of freedom of the workpiece are limited; a support 8 is fixed on the base, a third positioning pin 7 is fixed on the support 8, the distance between the third positioning pin 7 and the vertical line is 9 degrees and 45 '14.22', the distance between the third positioning pin 7 and the fabrication hole is 70.87mm, and therefore one degree of freedom is limited through the third positioning pin 7. The effect of six-point positioning is achieved. A pressing device is designed on a supporting plate 102, a supporting bolt is obtained by connecting a nut and a bolt rod piece, the bolt rod piece comprises a first bolt connecting rod 10 and a second bolt connecting rod 11, a pressing plate 15 is detachably connected to the end portion of the bolt rod piece, a pressing block 16 which is about 5mm as the same as the step difference of a workpiece is fixed in the middle of the pressing plate 15, the workpiece is pressed through the pressing block 16 and is connected with a movable bolt at the other end, and the pressing effect is achieved. When the pressing plate 15 is pressed tightly, the handle nut 3 is used for pressing tightly, the pressing device is used for pressing tightly after the pressing, and then the handle nut 3 is removed, so that the clamping of the processing workpiece can be completed.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a processingequipment of circular boss in curved surface which characterized in that includes:

the base (1) comprises a bottom plate (101) and a supporting plate (102) perpendicular to the bottom plate (101), and positioning parts for positioning a workpiece (17) are arranged on the supporting plate (102) and the bottom plate (101);

the pressing part is used for pressing a workpiece (17), is positioned on one side of the base (1) and can press and fix the workpiece positioned on the positioning part;

the grinding wheel (4) is arranged on the base on one side of a workpiece, the grinding wheel (4) is arranged on the upper portion of the base, and a machining groove (9) is formed in the grinding wheel (4).

2. The processing device for the curved inner circular boss is characterized in that the positioning components comprise positioning blocks (2) and positioning pins, the positioning blocks (2) are fixedly arranged on the supporting plate (102), and the distances between the three positioning blocks (2) and a bottom plate (101) are different; and positioning pins are arranged on the supporting plate and the bottom plate.

3. The device for machining the circular boss in the curved surface according to claim 2, wherein the positioning block (2) is provided with a boss matched with the machined part (17).

4. The machining device for the curved inner circular boss according to claim 2, wherein the positioning pins comprise a first positioning pin (5), a second positioning pin (6) and a third positioning pin (7), the first positioning pin (5) and the second positioning pin (6) are mounted on the support plate (102) at positions close to the positioning blocks (2), and the third positioning pin (7) is mounted on the bottom plate (101) and close to the support plate (102).

5. The processing device for the curved inner circular boss is characterized in that a support (8) is arranged on the bottom plate (101) and perpendicular to the plate surface of the bottom plate (101), and the third positioning pin (7) is mounted on the support (8).

6. The processing device of the curved inner circular boss is characterized in that the pressing part further comprises a first bolt connecting rod (10) and a second bolt connecting rod (11) which are connected to the supporting plate (102), the end of the first bolt connecting rod (10) is in threaded connection with a pressing plate (15) used for pressing a workpiece (17), one end, away from the first bolt connecting rod (10), of the pressing plate (15) is provided with a groove buckle matched with the end of the second bolt connecting rod (11), the end of the second bolt connecting rod (11) is provided with a locking part (14), and the second bolt connecting rod (11) presses the pressing plate (15) through tightening the locking part.

7. The processing device for the round boss in the curved surface according to claim 6, wherein the pressing part further comprises a mounting frame (13), the mounting frame (13) is fixedly arranged relative to the base (1), a handle nut (3) in threaded connection is arranged on the mounting frame (13), and one end, far away from the mounting frame (13), of the handle nut (3) can press the pressing plate (15).

8. The processing device for the curved-surface circular boss is characterized in that a pressing block (16) matched with the step of a workpiece (17) is arranged at the center position of the pressing plate (15), and the pressing block (16) is rotatably connected with the pressing plate (15) through a shaft pin (12).

9. A device for machining a boss with a curved surface according to claim 1, wherein the grinding wheel (4) is mounted on a grinding wheel mounting bracket of the device, and the grinding wheel mounting bracket is fixedly arranged relative to the base (1).

10. A device for machining a curved inner circular boss according to claim 1, wherein the machining grooves (9) are arranged as right-angled grooves.