Propeller positioning tool and processing positioning method thereof

Abstract

The present application relates to a kind of propeller positioning tool and its processing positioning method.The present application includes rotary table, rotary table is circular;Rotary table base plate, rotary table base plate concentrically connects in rotary table, the upper surface of rotary table base plate is equipped with mutually perpendicular X-axis slot and Y-axis slot, X-axis slot and Y-axis slot intersection is located in rotary table base plate upper surface center and rotary table base plate upper surface center is equipped with center slot, rotary table base plate upper surface is also distributed with first fixed hole and first pin hole;Center positioning block, center positioning block is inserted in center slot, center positioning block has center positioning hole;Propeller, propeller includes propeller blade and the flange plane connected to the bottom end of propeller blade, along flange plane center extends with the insertion column of center positioning hole cooperation, and, flange plane is equipped with the second fixed hole of with first fixed hole cooperation and the second pin hole of with first pin hole cooperation.The present application improves the precision of polishing work and improves processing quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical manufacturing and processing, in particular to a propeller positioning tool and a processing and positioning method thereof. BACKGROUND

[0002] With the continuous development of automation technology, industrial robots are gradually widely used in various industries. Compared with traditional manual polishing, robot polishing reduces the harm to the human body and reduces the occurrence of occupational diseases including pneumoconiosis. It is also an important process to realize digitization and intelligentization. These advantages are unmatched by traditional manual polishing. Robot polishing can greatly reduce the workload of workers, save time and improve work efficiency.

[0003] The robot polishing system mainly includes an industrial robot, a floating force control, an electric spindle, a numerical control turntable, a tool changing device, a feeding and discharging door machine, a dust removal device, etc. The propeller (adjustable pitch propeller) polishing is a complex curved surface landmark product with difficult-to-process curved surface characteristics. On this basis, there is also a problem of difficulty in calibrating the workpiece coordinate system itself. In addition, different tooling needs to be designed for different propeller structures, which greatly increases the cost. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the calibration problem of the workpiece coordinate system when the robot polishes the propeller, and to provide a propeller positioning tool and a processing and positioning method thereof.

[0005] To solve the above technical problems, the present application provides a propeller positioning tool, comprising:

[0006] A rotary table, which is circular in shape;

[0007] A turntable bottom plate is connected concentrically to the rotary table. The upper surface of the turntable bottom plate is provided with X-axis and Y-axis slots perpendicular to each other. The intersection of the X-axis and Y-axis slots is located at the center of the upper surface of the turntable bottom plate, and a center slot is provided at the center of the upper surface of the turntable bottom plate. The upper surface of the turntable bottom plate is also distributed with a first fixed hole and a first pin hole.

[0008] A center positioning block is inserted into the center slot. The center positioning block has a center positioning hole.

[0009] A propeller includes propeller blades and a flange plane connected to the bottom end of the propeller blades. A plug column cooperates with the center positioning hole along the center of the flange plane. The flange plane is provided with a second fixed hole cooperating with the first fixed hole and a second pin hole cooperating with the first pin hole.

[0010] In one embodiment of the present application, the rotary table is provided with a plurality of T-shaped grooves on its upper surface, and the rotary table base is provided with a plurality of connecting holes corresponding to the T-shaped grooves.

[0011] In one embodiment of the present application, the connecting hole, the first fixing hole and the second fixing hole are all countersunk holes.

[0012] In one embodiment of the present application, the T-shaped groove is provided with a T-shaped nut, and the connecting hole is connected with a connecting screw matched with the T-shaped nut.

[0013] In one embodiment of the present application, the second fixing hole is distributed in the center of the flange plane and symmetrically distributed on both sides of the propeller blade.

[0014] In one embodiment of the present application, the fixing assembly is further connected to the two second fixing holes on a diameter of the flange plane.

[0015] In one embodiment of the present application, the fixing assembly comprises an internal hexagonal screw and a gasket.

[0016] In one embodiment of the present application, the first pin hole is further inserted with a plug pin matched with the second pin hole.

[0017] In one embodiment of the present application, the rotary table base is provided with a notch, and the side end of the notch forms a calibration plane parallel to the diameter of the rotary table base.

[0018] The present application further provides a processing and positioning method of a propeller, which utilizes the propeller positioning tooling.

[0019] The connecting hole in the center of the rotary table base is connected with the T-shaped groove in the center of the rotary table by matching the internal hexagonal screw with the T-shaped nut, and whether the rotary table base and the rotary table are concentric is measured by using a dial indicator, the position of the rotary table base is adjusted according to the feedback value of the dial indicator, and then the internal hexagonal screw and the T-shaped nut are fastened.

[0020] The first coordinate point and the second coordinate point on the X-axis groove on the upper surface of the rotary table base and the third coordinate point on the Y-axis groove are calibrated by using a polishing robot, a workpiece coordinate system is constructed according to the first coordinate point, the second coordinate point and the third coordinate point, and the spatial position difference between the center of the workpiece coordinate system and the center of the rotary table is obtained.

[0021] Place the center positioning block at the center groove, and insert the post at the center of the flange plane into the center positioning hole, align the second pin hole with the pin in the first pin hole, and after placing in place, fix it in the two second fixing holes on the flange plane on a diameter, and use the inner hexagonal screw with the gasket to fix it;

[0022] Place the calibration tip in the remaining empty mounting hole, rotate the calibration tip to face the side of the robot, and contact the calibration tip with the end of the robot by grinding the robot, determine whether the center of the rotary table and the center of the flange plane are coincident, if coincident, proceed to the subsequent grinding work.

[0023] The above technical scheme of the present application has the following advantages compared with the prior art:

[0024] The propeller positioning tool and the processing and positioning method thereof have the following advantages. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to make the content of the present application easier to be clearly understood, the present application will be further described in detail below according to specific embodiments of the present application and in combination with the drawings.

[0026] Figure 1 is a structural schematic diagram of the propeller positioning tool of the present application.

[0027] Figure 2 is a structural schematic diagram of the rotary table of the present application.

[0028] Figure 3 is a structural schematic diagram of the rotary table bottom plate of the present application.

[0029] Figure 4 is a structural schematic diagram of the rotary table bottom plate and the center positioning block of the present application.

[0030] Figure 5 is a schematic diagram of the coordinate point selection on the rotary table bottom plate of the present application.

[0031] Figure 6 is a structural schematic diagram of the propeller blade of the present application.

[0032] Figure 7 is a schematic diagram of the propeller positioning tool and the grinding robot of the present application.

[0033] Description of the drawings: 100, polishing robot; 110, tool coordinate calibration tip; 200, tool library; 300, control cabinet; 400, electric control cabinet; 1, rotary table; 11, T-shaped groove; 2, rotary table bottom plate; 21, X-axis line groove; 211, first coordinate point; 212, second coordinate point; 22, Y-axis line groove; 221, third coordinate point; 23, center groove; 24, first fixed hole; 25, first pin hole; 26, connecting hole; 27, calibration plane; 3, center positioning block; 31, center positioning hole; 4, propeller; 41, propeller blade; 42, flange plane; 421, insertion column; 422, second fixed hole; 423, second pin hole; 5, fixed assembly; 51, inner hexagonal screw; 52, gasket; 6, calibration tip. DETAILED DESCRIPTION

[0034] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not as a limitation on the present application.

[0035] In the present application, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical solution of the present application, and is not indicative or suggestive of the technical features indicated must have a specific orientation, structure and operation in a specific orientation, therefore, cannot be understood as a limitation on the present application.

[0036] In the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than" "less than" "more than" and the like are not included in the number; "above" "below" "within" and the like are understood to include the number. In the description of the present application, if "first" "second" is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicative or suggestive of relative importance or implicit indication of the number of indicated technical features or implicit indication of the order of indicated technical features.

[0037] In the present application, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be broadly understood, for example, can be directly connected, can be indirectly connected through an intermediate medium; can be fixedly connected, can be detachably connected, can be integrally formed; can be mechanically connected, can be electrically connected or can communicate with each other; can be the connection or interaction relationship between two elements inside. The skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] Reference Figures 1 to 7 As shown in the drawings, a propeller positioning tool of the present application comprises:

[0039] Rotary table 1, the rotary table 1 is circular;

[0040] Rotary table base plate 2, the rotary table base plate 2 is connected concentrically to rotary table 1, the upper surface of rotary table base plate 2 is provided with mutually perpendicular X-axis slot 21 and Y-axis slot 22, the intersection of X-axis slot 21 and Y-axis slot 22 is located at the center of the upper surface of rotary table base plate 2 and the center of the upper surface of rotary table base plate 2 is provided with center slot 23, the upper surface of rotary table base plate 2 is also distributed with first fixed hole 24 and first pin hole 25;

[0041] Center positioning block 3, the center positioning block 3 is inserted into the center slot 23, the center positioning block 3 has center positioning hole 31;

[0042] Propeller 4, the propeller 4 includes propeller blade 41 and flange plane 42 connected to the bottom end of propeller blade 41, along the center of flange plane 42 extends the insertion column 421 (hat flag) matched with the center positioning hole 31, and the flange plane 42 is provided with the second fixed hole 422 matched with the first fixed hole 24 and the second pin hole 423 matched with the first pin hole 25.

[0043] Through the above setting, the center positioning block 3 is mainly used for fixing the center position of the propeller blade flange plane 42 of the adjustable propeller (propeller 4), because the length and diameter of the insertion column 421 of different batches of propeller blades 41 exist differences and the precision requirement is not high, by setting the center positioning block 3 (hat flag pad), the center positioning block 3 of appropriate size can be turned according to different specifications of propeller blade 41 products, this center positioning block 3 is simple in structure and easy to process, and can be replaced at any time.

[0044] Specifically, as shown in the drawings, Figure 2 The rotary table 1 is circumferentially distributed with a plurality of T-shaped grooves 11 with its upper surface as the center, and the center of the rotary table base plate 2 is uniformly circumferentially distributed with a plurality of connecting holes 26 corresponding to the T-shaped grooves 11.

[0045] In this embodiment, the X-axis slot 21 and the Y-axis slot 22 are the main reference lines of the workpiece coordinate system processed by high-precision machine tools, and the workpiece coordinate system of the product can be determined by taking two points on the X-axis slot 21 and one point on the Y-axis slot 22 through the tool coordinate calibration tip 110 of the polishing robot 100.

[0046] In this embodiment, as shown in the drawings, Figure 7 The polishing robot 100 is arranged on one side of the rotary table 1, and a tool library 200, a control cabinet 300 and an electric control cabinet 400 are arranged on one side of the polishing robot 100.

[0047] In this embodiment, as shown in the drawings, Figure 2 ,Figure 3 As shown, the number of the T-shaped grooves 11 and the connecting holes 26 is eight. Through the setting of the T-shaped grooves 11, the fixed position of the turntable bottom plate 2 at the rotary worktable 1 can be conveniently adjusted.

[0048] Specifically, the connecting holes 26, the first fixing holes 24 and the second fixing holes 422 are all countersunk holes.

[0049] Specifically, the T-shaped grooves 11 are provided with T-shaped nuts, and the connecting holes 26 are connected with connecting screws matched with the T-shaped nuts.

[0050] Specifically, as shown in the figure, Figure 6 The second fixing holes 422 are distributed circumferentially and symmetrically on both sides of the propeller blade 41 with the flange plane 42 as the center.

[0051] Specifically, as shown in the figure, Figure 4 The fixing assembly 5 is connected in the two second fixing holes 422 on a diameter of the flange plane 42.

[0052] Specifically, the fixing assembly 5 includes an inner hexagonal screw 51 and a gasket 52.

[0053] Specifically, the first pin hole 25 is also inserted with a plug pin matched with the second pin hole 423. The plug pin is a standard cylindrical straight pin. The first pin hole 25 and the second pin hole 423 of the flange plane 42 of the adjustable propeller are correspondingly matched and used. The standard cylindrical straight pin is matched. Because the first pin hole 25 is the main source of positioning accuracy, it cannot use an adapter block. Different specifications of the first pin hole 25 are processed on the upper surface of the turntable bottom plate 2 to match different products, so that one set of turntable bottom plate 2 can be used for multiple products.

[0054] Specifically, as shown in the figure, Figure 4 The turntable bottom plate 2 is provided with a notch circumferentially, and the side end of the notch forms an alignment plane 27 parallel to the diameter of the turntable bottom plate 2. Through the above setting, the alignment plane 27 serves as an alignment platform, which ensures the coincidence of the rotary rotary worktable 1 with the coordinate system of the robot itself, and also serves as a reference when the propeller workpiece is fixed on the tool and cannot be restored to the workpiece coordinate system through the X-axis slot 21 and the Y-axis slot 22.

[0055] The embodiment also provides a processing and positioning method of a propeller. The method utilizes the propeller 4 positioning tool, and includes the following steps:

[0056] S1, the center of the turntable base plate 2 is connected to the T-shaped groove 11 of the rotary table 1 through the hexagonal screw 51 and the T-shaped nut, and the concentricity of the turntable base plate 2 and the rotary table 1 is measured by using a dial gauge, the position of the turntable base plate 2 is adjusted through the feedback value of the dial gauge, and then the hexagonal screw 51 and the T-shaped nut are fastened;

[0057] S2, the first coordinate point 211, the second coordinate point 212 on the upper surface of the turntable base plate 2 and the third coordinate point 221 on the Y-axis groove 22 are calibrated by using the polishing robot 100 to clamp the tool coordinate calibration sharp 110, and the workpiece coordinate system is constructed according to the first coordinate point 211, the second coordinate point 212 and the third coordinate point 221, so that the spatial position difference (i.e. the difference RX, RY and RZ between the coordinates) between the center of the workpiece coordinate system and the center of the rotary table 1 is obtained;

[0058] S3, the center positioning block 3 is placed at the center groove 23, the insertion column 421 at the center of the flange plane 42 is inserted into the center positioning hole 31, the second pin hole 423 is aligned with the insertion pin in the first pin hole 25, and after being placed in place, the M24 reinforced and lengthened hexagonal screw 51 is used to fix the flange plane 42 on two second fixing holes 422 on a diameter, and a gasket 52 is used for fixing; only two second fixing holes 422 on a diameter of the flange plane 42 need to be selected for fixing in the embodiment, the pressure generated in the polishing position machining process is small, and through calculation, two M24 screws can well fix the spiral blade workpiece;

[0059] S4, in order to further verify whether the center of the spiral blade workpiece coincides with the center of the rotary table, so as to ensure the rotation accuracy in the machining process, the calibration sharp 6 is placed in the remaining empty mounting hole, the calibration sharp 6 is rotated to face the side of the robot, the end calibration sharp of the polishing robot 100 is in contact with the calibration sharp 6, and whether the center of the rotary table 1 coincides with the center of the flange plane 42 is judged, if coincides, subsequent polishing work is carried out.

[0060] S5, the last spiral blade workpiece is removed, the turntable base plate 2 is rotated to a specified angle, and the same steps are used for the next workpiece by replacing different specifications of the center positioning block 3, the insertion pin and the fixing assembly 5.

[0061] Compared with the traditional tooling, more first fixing holes 24 and first pin holes 25 can be added to the turntable base plate 2 to meet more specifications according to different specifications of the adjustable pitch spiral product, while the traditional tooling can only meet one specification of the product, the cost of the two toolings is about forty thousand yuan, and it takes 15 to 20 days to complete, and the workpiece coordinate system determination work can be met by increasing only one percent of the budget and one tenth of the time on each subsequent different propeller 4 product.

[0062] Finally, it should be noted that the above detailed description is merely illustrative of the technical solutions of the present application and is not limiting, and although the present application has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be encompassed in the scope of the claims of the present application.

Claims

1. A method of machining a propeller, characterized in that, A propeller positioning tool is provided, which comprises: A rotary table (1) in a circular shape; A rotary table base plate (2) concentrically connected to the rotary table (1), the upper surface of the rotary table base plate (2) being provided with mutually perpendicular X-axis grooves (21) and Y-axis grooves (22), the intersection of the X-axis grooves (21) and the Y-axis grooves (22) being located at the center of the upper surface of the rotary table base plate (2), and the center of the upper surface of the rotary table base plate (2) being provided with a center groove (23), the upper surface of the rotary table base plate (2) being further provided with first fixing holes (24) and first pin holes (25); A center positioning block (3) inserted into the center groove (23), the center positioning block (3) having a center positioning hole (31); A propeller (4) comprising propeller blades (41) and a flange plane (42) connected to the bottom end of the propeller blades (41), a plug column (421) extending along the center of the flange plane (42) and cooperating with the center positioning hole (31), and the flange plane (42) being provided with second fixing holes (422) cooperating with the first fixing holes (24) and second pin holes (423) cooperating with the first pin holes (25); The rotary table (1) is circumferentially distributed with a plurality of T-shaped grooves (11) at the center of the upper surface thereof, and the center of the rotary table base plate (2) is uniformly circumferentially distributed with a plurality of connecting holes (26) corresponding to the T-shaped grooves (11); The T-shaped grooves (11) are provided with T-shaped nuts, and the connecting holes (26) are connected with connecting screws cooperating with the T-shaped nuts; The method comprises the following steps: The connecting holes (26) in the center of the rotary table base plate (2) are connected to the T-shaped grooves (11) in the center of the rotary table (1) by cooperating the T-shaped nuts with the internal hexagonal screws (51), whether the rotary table base plate (2) and the rotary table (1) are concentric is measured by using a dial gauge, the position of the rotary table base plate (2) is adjusted according to the feedback value of the dial gauge, and then the internal hexagonal screws (51) and the T-shaped nuts are fastened; The polishing robot (100) clamps tool coordinate calibration tips (110) at first coordinate points (211) and second coordinate points (212) on the X-axis grooves (21) on both sides of the center of the upper surface of the rotary table base plate (2) and at a third coordinate point (221) on the Y-axis grooves (22), a workpiece coordinate system is constructed according to the first coordinate points (211), the second coordinate points (212) and the third coordinate point (221), and the spatial position difference between the center of the workpiece coordinate system and the center of the rotary table (1) is obtained; The center positioning block (3) is placed at the center groove (23), the plug column (421) at the center of the flange plane (42) is inserted into the center positioning hole (31), the second pin holes (423) are aligned with the pins in the first pin holes (25), and after being placed in position, the internal hexagonal screws (51) are used to fix the flange plane (42) in two second fixing holes (422) on a diameter thereof by cooperating with washers (52). Place the calibration tip (6) in the remaining empty mounting hole, rotate the calibration tip (6) to face the side of the robot, and contact the calibration tip (6) with the end calibration tip of the polishing robot (100) to determine whether the center of the rotary table (1) and the center of the flange plane (42) coincide.

2. The method of claim 1, wherein, The connecting hole (26), the first fixing hole (24) and the second fixing hole (422) are all countersunk holes.

3. The method of claim 1, wherein, The second fixing hole (422) is circumferentially distributed and symmetrically distributed on both sides of the propeller blade (41) with the center of the flange plane (42).

4. The method of claim 1, wherein, The fixing assembly (5) is connected to the two second fixing holes (422) on a diameter of the flange plane (42).

5. A method of machining and positioning a propeller according to claim 4, characterized in that, The fixing assembly (5) comprises an inner hexagonal screw (51) and a gasket (52).

6. The method of claim 1, wherein, The first pin hole (25) is further inserted with a plug pin matched with the second pin hole (423).

7. The method of claim 1, wherein: The rotary table bottom plate (2) is circumferentially provided with a notch, and the notch side end forms a calibration plane (27) parallel to the diameter of the rotary table bottom plate (2).

Images