Turn-milling auxiliary machining device and method for rotating vane type steering engine blade

Abstract

The turning-milling auxiliary machining device and method are suitable for clamping a steering engine blade blank, the steering engine blade blank comprises a first main body and a second main body which are connected, the first main body is provided with a convex cambered surface, the convex cambered surface is provided with two sealing grooves, the sealing grooves extend to the end face of the second main body, the second main body is provided with a concave cambered surface, and the concave cambered surface is provided with a convex cambered surface. A key groove is formed in the concave arc face, the machining device comprises two tool flanges, and the two end faces of the steering engine blade blank are attached to the two tool flanges respectively and locked through threaded pins. The end face of the steering engine blade blank is attached to the two tool flanges and locked through the threaded pins, and clamping is achieved; the tool is suitable for clamping a novel steering engine blade blank with a sealing groove extending to the end face position, installation is easy, assembling and welding are not needed, the machining efficiency is high, and the situation that the blade blank cannot be installed in a flange plate is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a turning and milling auxiliary processing device and a processing method for a rotary vane steering gear blade. Background Art

[0002] The rotary vane servo is small in size and highly efficient in control. It can directly act on the rotor parts to make rotational motion through high and low pressure oil, thereby realizing the steering operation. The blade is one of the important components of the rotary vane servo. It is installed on the rotor to form the rotor part. The high pressure oil acts on the blade to drive the rotor to rotate. The blade needs to be stressed and sealed at the same time. The structure is relatively complex, the process is more complicated, the processing time is long, and the cost is high.

[0003] There is a new type of blade part, which has a sealing groove on its outer arc surface. The length of the sealing groove is the same as the overall length of the blade and is in the circumferential radial direction. The inner arc surface is provided with a keyway. Existing tooling, such as patent CN109773214B, discloses a blade turning tooling and a processing method thereof. This tooling includes two tooling flanges. The blade needs to be inserted into the tooling flange and welded on the flange. Since the sealing groove on the new blade extends to the end face position, and in this tooling, the entire blade end face needs to fit with the slot on the end face of the tooling flange, it cannot be used to process the sealing groove. When milling the sealing groove, the blade needs to be removed and milled one by one, which has low processing efficiency, and the gap distance between the clamping side wall and the blade blank is only 0.03-0.05mm. Once the tolerance is exceeded, the blade cannot be installed in the flange. The tooling flange needs to be configured according to the size of the blade. One tooling can only process one type of blade, and welding is required, which is a complicated process. Summary of the invention

[0004] The purpose of the present invention is to provide a turning and milling auxiliary processing device and processing method for rotary blade servo engine blades, which can shorten the production cycle of blades, improve processing efficiency and reduce production costs in view of the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A rotary vane steering gear blade turning and milling auxiliary processing device, the processing device is suitable for clamping a steering gear blade blank, the steering gear blade blank comprises a first main body and a second main body in an elongated shape, the first main body is connected to the second main body along the length direction of the second main body, a convex arc surface is provided on the first main body on the side facing away from the second main body, two sealing grooves are provided on the convex arc surface along the length direction thereof, one end of the sealing groove extends to one end face of the second main body, and the other end of the sealing groove extends to the other end face of the second main body, a concave arc surface is provided on the second main body on the side facing away from the first main body, and a key groove is provided on the concave arc surface along the length direction thereof; The processing device includes two tooling flanges, which are respectively fitted with the end faces of both ends of the second body. The tooling flanges include a flange ring and multiple threaded pins. The outer diameter of the flange ring is smaller than the inner diameter of the sealing groove. A threaded hole group is provided on the flange ring, and the threaded hole group includes multiple threaded holes. Multiple positioning hole groups are provided on the end faces of both ends of the second body, and the positioning hole group includes multiple positioning holes. The threaded pins are locked with the positioning holes after passing through the threaded holes.

[0006] The plurality of threaded holes are arranged at equal intervals around the circumference of the flange ring, and the plurality of positioning holes are arranged at equal intervals around the circumference of the end surface of the second main body.

[0007] The number of the threaded hole groups is two, the two threaded hole groups have different graduations, and the diameters of the circles where the two threaded hole groups are located are different.

[0008] The outer diameter of the flange ring is equal to the diameter of the concave arc surface.

[0009] The depth of the positioning hole is 5mm-7mm.

[0010] A method for turning and milling assisted machining of rotary vane steering gear blades, the machining method is based on the aforementioned machining device and comprises the following steps: Step 1: Use threaded pins to lock the servo blade blank and the two tooling flanges to ensure that the servo blade blank is perpendicular to the two tooling flanges; Step 2: Place the processing device vertically on the rotary table of the vertical lathe, ensure that the center of the tooling flange coincides with the rotation center of the rotary table, and perform rough machining of the concave and convex arc surfaces, and fine machining of the concave and convex arc surfaces; Step 3: Place the processing device horizontally on the rotary table of the vertical lathe, install a right-angle milling head on the spindle of the vertical lathe, and process the keyway; Step 4: Place the processing device vertically on the rotary table of the vertical lathe, ensure that the spindle direction of the vertical lathe is parallel to the central axis of the servo blade blank, rotate the rotary table clockwise by a first angle to process a sealing groove, and then rotate counterclockwise by a second angle to process another sealing groove. The second angle is twice the first angle.

[0011] In step 1, the verticality between the steering gear blade blank and the two tooling flanges is within 0.1 mm.

[0012] In step 4, the parallelism between the spindle direction of the vertical lathe and the central axis of the steering gear blade blank is within 0.1 mm.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. A rotary vane steering gear blade turning and milling auxiliary processing device of the present invention comprises two tooling flanges, the two tooling flanges are respectively fitted with the end faces of both ends of a second body, the tooling flanges comprise a flange ring and a plurality of threaded pins, the outer diameter of the flange ring is smaller than the inner diameter of the sealing groove, a threaded hole group is provided on the flange ring, the threaded hole group comprises a plurality of threaded holes, a plurality of positioning hole groups are provided on both end faces of the second body, the positioning hole group comprises a plurality of positioning holes, and the threaded pins are locked with the positioning holes after passing through the threaded holes; the end face of the steering gear blade blank is fitted with the two tooling flanges, and is locked by the threaded pins, so as to complete the clamping; the present invention is suitable for the clamping of the steering gear blade blank whose sealing groove extends to the end face position, and the installation is simple, no welding is required, the processing efficiency is high, and there will be no situation that the blade blank cannot be installed into the flange.

[0014] 2. In a rotary vane servo blade turning and milling auxiliary processing device of the present invention, there are two threaded hole groups, the two threaded hole groups have different divisions, and the circle diameters of the two threaded hole groups are different; in the traditional slot clamping method, the tooling flange needs to be configured according to the model of the blade. The present invention sets two threaded hole groups with different divisions and circle diameters, which can adapt to blades of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the assembly of the processing device and the steering gear blade blank according to the present invention.

[0016] Figure 2 It is a top view of the steering gear blade blank of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the sealing groove of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the keyway described in the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the flange ring of the present invention.

[0020] Figure 6 The present invention is a flowchart of the processing method.

[0021] Figure 7 This is a schematic diagram of keyway processing.

[0022] Figure 8 Schematic diagram of the processing of the sealing groove.

[0023] In the above figure, the steering gear blade blank 1, the first body 11, the second body 12, the convex arc surface 13, the sealing groove 14, the concave arc surface 15, the keyway 16, the center axis 17, the tooling flange 2, the flange ring 21, the threaded pin 22, the threaded hole 23, and the positioning hole 24. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with specific implementation methods and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] like Figures 1 to 4 As shown, the present invention provides a rotary vane steering gear blade turning and milling auxiliary processing device, the processing device is suitable for clamping a steering gear blade blank 1, the steering gear blade blank 1 comprises a first main body 11 and a second main body 12 in a long strip shape, the first main body 11 is connected to the second main body 12 along the length direction of the second main body 12, a convex arc surface 13 is provided on the first main body 11 at a side facing away from the second main body 12, two sealing grooves 14 are provided on the convex arc surface 13 along its length direction, one end of the sealing groove 14 extends to one end face of the second main body 12, and the other end of the sealing groove 14 extends to the other end face of the second main body 12, a concave arc surface 15 is provided on the second main body 12 at a side facing away from the first main body 11, and a key groove 16 is provided on the concave arc surface 15 along its length direction; The processing device includes two tooling flanges 2, which are respectively fitted with the end faces of both ends of the second main body 12. The tooling flanges 2 include a flange ring 21 and a plurality of threaded pins 22. The outer diameter of the flange ring 21 is smaller than the inner diameter of the sealing groove 14. A threaded hole group is provided on the flange ring 21, and the threaded hole group includes a plurality of threaded holes 23. A plurality of positioning hole groups are provided on the end faces of both ends of the second main body 12, and the positioning hole group includes a plurality of positioning holes 24. The threaded pins 22 are locked with the positioning holes 24 after passing through the threaded holes 23.

[0028] During armoring, first place a tooling flange 2 on the rotary table of the vertical lathe, lock the threaded pin 22 thereon, then vertically place the steering gear blade blank 1 on this tooling flange 2, ensure that the positioning hole 24 is aligned with the threaded pin 22, and vertically place the blades on the lower tooling flange respectively, and then install another tooling flange 2 on the top of the steering gear blade blank 1, and lock its threaded pin 22. After clamping, the verticality of the steering gear blade blank 1 and the two tooling flanges 2 should be ensured to be within 0.1mm, and the machining allowances of the convex arc surface 13 and the concave arc surface 15 of the steering gear blade blank 1 should be checked to ensure that the allowances meet the requirements (0.2-0.3mm).

[0029] In another embodiment of the present invention, in order to ensure uniform force and improve clamping reliability, the plurality of threaded holes 23 are arranged at equal intervals around the circumference of the flange ring 21 , and the plurality of positioning holes 24 are arranged at equal intervals around the circumference of the end surface of the second body 12 .

[0030] In another embodiment of the present invention, Figure 5 As shown, in order to improve the versatility of the processing device, the number of the threaded hole groups is two, the two threaded hole groups have different divisions, and the diameters of the circles where the two threaded hole groups are located are different. According to the blade model, the corresponding threaded hole group can be selected for locking.

[0031] Exemplarily, the outer diameter of the flange ring 21 is equal to the diameter of the concave arc surface 15 .

[0032] Exemplarily, the depth of the positioning hole 24 is 5 mm-7 mm.

[0033] Exemplarily, the keyway 16 is arranged on the central axis 17 of the steering gear blade blank 1 , and the two sealing grooves 14 are symmetrically arranged on both sides of the central axis 17 of the steering gear blade blank 1 .

[0034] like Figure 6 As shown, the present invention also provides a turning and milling assisted processing method for rotary vane steering gear blades, the processing method is based on the above-mentioned processing device and includes the following steps: Step 1: Use the threaded pin 22 to lock the steering gear blade blank 1 and the two tooling flanges 2, ensuring that the verticality between the steering gear blade blank 1 and the two tooling flanges 2 is within 0.1 mm; Step 2, place the processing device vertically on the rotary table of the vertical lathe, ensure that the center of the tooling flange 2 coincides with the rotation center of the rotary table, ensure that their coaxiality is less than Φ0.1, and press it with a pressing plate; first rough-process the concave arc surface 15 and the convex arc surface 13, and then fine-process the concave arc surface 15 and the convex arc surface 13. After processing, the roughness requirement of the convex arc surface 13 is Ra1.6, and the roughness requirement of the concave arc surface 15 is Ra0.8. If the roughness of the concave arc surface 15 cannot meet the requirements, a grinding belt wheel with a grit of more than 1000 can be further selected for super-finishing; Step 3: Place the processing device horizontally on the rotary table of the vertical lathe, install a right-angle milling head on the spindle of the vertical lathe, and process the keyway 16 with the geometric center of the blade length direction as the origin of the processing coordinate system; the processing schematic diagram of the keyway 16 is shown in Figure 7 As shown; Step 4: Place the processing device vertically on the rotary table of the vertical lathe, ensure that the spindle direction of the vertical lathe is parallel to the central axis 17 of the steering gear blade blank 1, rotate the rotary table clockwise by a first angle to process the first sealing groove 14, and then rotate counterclockwise by a second angle to process the second sealing groove 14, wherein the second angle is twice the first angle; specifically, the first angle is 4°, and the second angle is 8°; the processing schematic diagram of the sealing groove 14 is shown in FIG. Figure 8 As shown; After processing one servo blade blank 1, the workbench is rotated 90° (either clockwise or counterclockwise) to process other servo blade blanks 1.

[0035] In another embodiment of the present invention, the verticality between the steering gear blade blank 1 and the two tooling flanges 2 is within 0.1 mm.

[0036] In another embodiment of the present invention, the parallelism between the spindle direction of the vertical lathe and the central axis of the steering gear blade blank 1 is within 0.1 mm.

Claims

1. A rotary vane steering gear blade turning and milling auxiliary processing device, characterized in that: The processing device is suitable for clamping a steering gear blade blank (1), the steering gear blade blank (1) comprising a first main body (11) and a second main body (12) in a long strip shape, the first main body (11) being connected to the second main body (12) along the length direction of the second main body (12), a convex arc surface (13) being provided on the first main body (11) on a side facing away from the second main body (12), two sealing grooves (14) being provided on the convex arc surface (13) along its length direction, one end of the sealing groove (14) extending to one end face of the second main body (12), and the other end of the sealing groove (14) extending to the other end face of the second main body (12), a concave arc surface (15) being provided on the second main body (12) on a side facing away from the first main body (11), and a key groove (16) being provided on the concave arc surface (15) along its length direction; The processing device comprises two tooling flanges (2), the two tooling flanges (2) are respectively fitted with the end faces of both ends of the second body (12), the tooling flanges (2) comprise a flange ring (21) and a plurality of threaded pins (22), the outer diameter of the flange ring (21) is smaller than the inner diameter of the sealing groove (14), a threaded hole group is provided on the flange ring (21), the threaded hole group comprises a plurality of threaded holes (23), the end faces of both ends of the second body (12) are each provided with a plurality of positioning hole groups, the positioning hole group comprises a plurality of positioning holes (24), and the threaded pins (22) are locked with the positioning holes (24) after passing through the threaded holes (23).

2. The rotary vane steering gear blade turning and milling auxiliary processing device according to claim 1, characterized in that: The plurality of threaded holes (23) are arranged at equal intervals around the circumference of the flange ring (21), and the plurality of positioning holes (24) are arranged at equal intervals around the circumference of the end surface of the second body (12).

3. The rotary vane steering gear blade turning and milling auxiliary processing device according to claim 1, characterized in that: The number of the threaded hole groups is two, the two threaded hole groups have different graduations, and the diameters of the circles where the two threaded hole groups are located are different.

4. The rotary vane steering gear blade turning and milling auxiliary processing device according to claim 1, characterized in that: The outer diameter of the flange ring (21) is equal to the diameter of the concave arc surface (15).

5. The rotary vane steering gear blade turning and milling auxiliary processing device according to claim 1, characterized in that: The depth of the positioning hole (24) is 5 mm-7 mm.

6. A method for turning and milling assisted machining of rotary vane steering gear blades, characterized in that: The processing method is carried out based on the processing device described in any one of claims 1 to 5, comprising the following steps: Step 1: Use a threaded pin (22) to lock the steering gear blade blank (1) and the two tooling flanges (2) to ensure that the steering gear blade blank (1) and the two tooling flanges (2) are perpendicular; Step 2: vertically place the processing device on the rotary table of the vertical lathe, ensure that the center of the tooling flange (2) coincides with the rotation center of the rotary table, and roughly process the concave arc surface (15) and the convex arc surface (13), and finely process the concave arc surface (15) and the convex arc surface (13); Step 3: Place the processing device horizontally on the rotary table of the vertical lathe, install a right-angle milling head on the spindle of the vertical lathe, and process the keyway (16); Step 4: vertically place the processing device on the rotary table of the vertical lathe, ensure that the main axis direction of the vertical lathe is parallel to the central axis (17) of the steering gear blade blank (1), and first rotate the rotary table clockwise by a first angle to process a sealing groove (14), and then rotate counterclockwise by a second angle to process another sealing groove (14), wherein the second angle is twice the first angle.

7. The method for turning and milling assisted machining of rotary vane steering gear blades according to claim 6, characterized in that: In step 1, the verticality between the steering gear blade blank (1) and the two tooling flanges (2) is within 0.1 mm.

8. The method for turning and milling assisted machining of rotary vane steering gear blades according to claim 6, characterized in that: In step 4, the parallelism between the spindle direction of the vertical lathe and the central axis of the steering gear blade blank (1) is within 0.1 m.

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