Processing method and processing clamp for die forging T-shaped tee joint

Abstract

The application discloses a machining method and a machining clamp for a die forging T-shaped tee joint, and is used for machining of a precise tee joint of an aero-engine. Three outer circles of the tee joint are processed step by step, and the machining clamp comprises three novel positioning devices. Each positioning device can be used for processing after the clamp is assembled with the part, and the part processed in the previous step can be quickly assembled on the next positioning device to complete processing. The device is convenient and fast, can be repeatedly positioned and clamped for multiple times, can be used as a high-precision clamp for turning machining of the T-shaped tee joint of the aero-engine, is used for guaranteeing position precision of a machining surface after re-clamping and a processed surface, improves production efficiency, reduces production cost, is better in product size consistency, and can effectively control product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of part processing, in particular to a processing method and processing clamp for a die forging T-shaped tee joint. BACKGROUND

[0002] The tee joint is an important connecting element of the precision parts of an aero-engine, and has a complex structure and high product precision requirement. The material specification of the part is a die forging, and the surfaces of the three directions of the blank are extremely irregular. The processing and alignment problem has been one of the technical difficulties of the part, and the positioning accuracy determines the product quality of the subsequent processing.

[0003] As shown in the prior art, Figure 1 At present, the left end blank outer circle A is clamped and aligned by a three-jaw chuck. First, rough machining of the blank is performed. The turning machining content is used as the subsequent machining reference, and involves axial and radial positioning directions. Therefore, the rough reference is very important. Since the positioning reference surface is the blank surface, part of the outer circle has a certain slope, and there is a size difference between the blank surfaces, which causes the part alignment time to be relatively long. For individual parts with large shape differences, the part cannot be aligned at all. After the part is machined by the three-jaw chuck, only the radial positioning reference can be controlled, and the axial reference cannot be controlled. When machining the outer circle B direction profile, the traditional four-jaw chuck is usually used to clamp and align the part. However, the four-jaw chuck has the following disadvantages: 1. The four jaws of the four-jaw chuck move independently. When clamping, the four-jaw chuck cannot automatically center. The adjustment and alignment are relatively complicated, time-consuming and labor-intensive. The results need to be continuously adjusted and verified, which seriously affects the production efficiency. 2. The four-jaw chuck has poor repeatability. After the part is machined, the part is removed and re-clamped. It is difficult to restore the previous position. The distance between the hole axial center line and the end surface may vary in length for each part, and the product size consistency is not good. 3. The part has the risk of loosening and falling during the machining process of the four-jaw chuck clamped part. SUMMARY

[0004] The present application provides a processing method and processing clamp for a die forging T-shaped tee joint, aiming to solve the technical problems in the prior art.

[0005] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0006] A processing method for a die forging T-shaped tee joint for processing an aero-engine precision tee joint, comprising the following steps:

[0007] S1, the positioning device one is placed on the newly bored soft jaw and fixed, the part to be processed is clamped and positioned in the positioning device one, the end face of the outer circle C end of the part to be processed is rough turned, the outer circle is rough turned, and a hole is drilled at the outer circle C end, and then the part to be processed is finish turned;

[0008] S2, the soft jaw clamps the outer circle C end of the part to be machined, and processes the reference surface, outer circle and tapered inner hole of the outer circle A end;

[0009] S3, the part to be machined is clamped to the positioning device two, and is positioned and fixed through the outer circle A and the outer circle C, the end face and the outer circle of the outer circle B end are roughly turned, the center hole is processed, the end face and the outer circle are then precisely turned and the outer thread is turned, and finally the inner hole is milled and the reamer is milled.

[0010] S4, the soft jaw clamps the outer circle A end of the part to be machined, and processes the forming surface of the outer circle C end and turns the outer thread.

[0011] S5, the part to be machined is clamped to the positioning device three, the end face and the outer circle of the outer circle A end are roughly turned, the inner hole is roughly turned, the end face and the outer circle are precisely turned, and the inner hole is precisely turned.

[0012] A processing clamp for a die forging T-shaped tee joint, the processing clamp comprises a positioning device one, a positioning device two and a positioning device three, the processing clamp is used for clamping a part to be machined, and the part to be machined comprises an outer circle A, an outer circle B and an outer circle C.

[0013] Specifically, one end of the positioning device one is a fixed end fixed with the soft jaw, and the other end is a clamping end, and the clamping end is provided with a clamping groove matched with the shape of the part to be machined.

[0014] Specifically, one side of the clamping groove is provided with two circular arc positioning surfaces perpendicular to each other, and the other side is provided with a threaded hole in which a pressing screw one is installed.

[0015] Specifically, the two circular arc positioning surfaces are respectively engaged with the circular arcs of the part to be machined to realize positioning when clamped, and the pressing screw presses the side surface of the part to be machined.

[0016] Specifically, the left and right ends of the T-shaped groove on the clamping end of the positioning device two are communicated with the threaded holes, a pressing screw two is installed in the threaded holes, the upper end of the narrower end of the T-shaped groove is communicated with the threaded hole, a tapered head positioning screw is installed in the threaded hole, the lower end of the wider end of the T-shaped groove is communicated with the inner hole, a positioning bottom cover is installed in the inner hole, and the positioning bottom cover is provided with a positioning circular table and located in the inner hole.

[0017] Specifically, the outer circle A and the outer circle C are respectively located at the upper and lower ends of the T-shaped groove, the tapered inner hole on the outer circle A is matched with the tapered head positioning screw for positioning, the outer circle C is located in the inner hole at the lower part of the T-shaped groove and contacts with the positioning circular table of the positioning bottom cover, and the pressing screw two presses the two side surfaces of the part to be machined.

[0018] Specifically, the positioning device three is a cylindrical body, the positioning device three is provided with a center hole, and a threaded hole is arranged at the front end of the center hole.

[0019] Specifically, the threaded hole is matched and positioned with the external thread formed at the end of the outer circle C.

[0020] Based on the above technical solution, the following technical effects can be achieved:

[0021] The present application finds available positioning reference by optimizing the processing route, designs and invents a new processing clamp, which does not need to find the center of the part every time, and can start processing the product after clamping the part according to the clamping steps. The device is convenient and fast, can be repeatedly positioned and clamped, can be used as a high-precision clamp for turning the T-shaped three-way joint of the aircraft engine, and can be used to ensure the position accuracy of the machined surface after re-clamping, improve the production efficiency, reduce the production cost, and better the product size consistency and product quality. The present application not only solves the technical bottleneck of the forged parts, but also provides a certain processing idea and process method for other similar three-way joints, which can play a good reference and promotion role. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure schematic diagram of a positioning device two in the present application;

[0023] Figure 2 is a structure schematic diagram of a positioning device one in the present application;

[0024] Figure 3 is an assembly schematic diagram of the positioning device one and the part to be processed in the present application;

[0025] Figure 4 is a structure schematic diagram of the part to be processed after step S1 in the present application;

[0026] Figure 5 is a structure schematic diagram of the part to be processed after step S2 in the present application;

[0027] Figure 6 is a structure schematic diagram of a positioning device two in the present application;

[0028] Figure 7 is a structure schematic diagram of a positioning bottom cover in the present application;

[0029] Figure 8 is an assembly schematic diagram of the positioning device two and the part to be processed in the present application;

[0030] Figure 9 is a structure schematic diagram of the part to be processed after step S3 in the present application;

[0031] Figure 10 is a structure schematic diagram of the part to be processed after step S4 in the present application;

[0032] Figure 11is a schematic view of the positioning device three structure in the present application;

[0033] Figure 12 is a schematic view of the positioning device three and the part to be machined in the present application assembly;

[0034] Figure 13 is a schematic view of the part to be machined in the present application after step S5 processing structure (finished product).

[0035] In the figure: 1.1-Claw slot, 1.2-Circular arc positioning surface, 1.3-Compression screw one, 2.1-T-shaped slot, 2.2-Compression screw two, 2.3-Taper head positioning screw, 2.4-Positioning bottom cover, 3.1-Screw hole, 4-Part to be machined, 4.1-Outside circle A, 4.2-Outside circle B, 4.3-Outside circle C. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the present application.

[0037] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In the description of the present application, unless otherwise explicitly defined, the words such as setting, mounting, connecting, etc. should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.

[0040] As Figures 2-13 Illustrated, a kind of die forging T type tee joint processing method, for the processing of precision tee joint of aero-engine, including the following steps:

[0041] S1, positioning device one is placed into to newly bored soft jaw and is fixed, part to be machined 4 is placed into positioning device one and is clamped and positioned, the end face of the outside circle C4.3 end of part to be machined 4 is roughly processed, and hole is drilled in the outside circle C4.3 end, then finish machining, the processed part is as shown in Figure 4 ;

[0042] S2, the soft jaw clamps the outer circle C4.3 end of the part to be machined 4. The reference surface, outer circle, and tapered inner hole of the outer circle A4.1 end are machined, and the machined part is as shown in Figure 5 ;

[0043] S3, the part to be machined 4 is clamped to the second positioning device and fixed by the outer circle A4.1 and the outer circle C4.3. The end face and outer circle of the outer circle B4.2 end are roughed, the center hole is machined, the end face and outer circle are finished, and the outer thread is machined. Finally, the inner hole is milled with a reamer. The machined part is as shown in Figure 9 ;

[0044] S4, the soft jaw clamps the outer circle A4.1 end of the part to be machined 4. The forming surface of the outer circle C4.3 end is machined, and the outer thread is machined. The machined part is as shown in Figure 10 ;

[0045] S5, the part to be machined 4 is clamped to the third positioning device. The end face and outer circle of the outer circle A4.1 end are roughed, the inner hole is roughed, the end face and outer circle are finished, and the inner hole is finished. The machined part is as shown in Figure 13 .

[0046] A processing clamp for a die forging T-shaped tee joint, the processing clamp comprising a first positioning device, a second positioning device, and a third positioning device, the processing clamp being used to clamp a part to be machined 4, the part to be machined comprising an outer circle A4.1, an outer circle B4.2, and an outer circle C4.3.

[0047] Optionally or preferably, one end of the first positioning device is a fixed end fixed with a soft jaw, and the other end is a clamping end provided with a clamping groove 1.1 matched with the shape of the part to be machined. One side of the clamping groove 1.1 is provided with two circular arc positioning surfaces 1.2 perpendicular to each other, and the other side is provided with a threaded hole in which a first compression screw 1.3 is installed. The two circular arc positioning surfaces 1.2 are respectively engaged with the circular arc of the part to be machined 4 to realize positioning, and the first compression screw 1.3 compresses the side surface of the part to be machined 4. The first positioning device is placed in the newly bored soft jaw and fixed, the part to be machined 4 is placed in the first positioning device, positioned by the circular arc positioning surface 1.2, and the first compression screw 1.3 is tightened with a hexagonal wrench. After the above operations are completed, the part can be machined.

[0048] Optionally or preferably, the clamping end of the second positioning device is provided with a T-shaped slot 2.1 at the left and right ends of which communicate with threaded holes, and a compression screw 2.2 is installed in the threaded holes, the narrower upper end of the T-shaped slot 2.1 communicates with a threaded hole in which a taper head positioning screw 2.3 is installed, the wider lower end of the T-shaped slot 2.1 communicates with an inner hole, a positioning bottom cover 2.4 is installed in the inner hole, the positioning bottom cover 2.4 is provided with a positioning circular platform and is located in the inner hole, the outer circle A4.1 and the outer circle C4.3 are located at the upper and lower ends of the T-shaped slot 2.1 respectively, the inner hole with a taper surface on the outer circle A4.1 cooperates with the taper head positioning screw 2.3, the outer circle C4.3 is located in the inner hole at the lower part of the T-shaped slot 2.1 and contacts the positioning circular platform of the positioning bottom cover 2.4, and the compression screw 2.2 compresses the two sides of the part to be machined 4. The second positioning device is fixed on the newly bored soft jaw, the part to be machined 4 is placed in the T-shaped slot 2.1, and the taper head positioning screw 2.3 is cooperated with the inner hole with a taper surface on the outer circle A4.1 by gently pressing with hands, and attention should be paid that the taper head positioning screw 2.3 cannot clamp the part at this time, and it can be clamped gently. Then, the left and right compression screws 2.2 are tightened in turn, the part to be machined 4 is clamped in the left and right directions, and then the left and right compression screws 2.2 are tightened by using a hexagonal wrench, finally, the taper head positioning screw 2.3 is tightened by using a movable wrench, and the above operations are completed, and then the machining of the part can be started. After the machining is completed, if the part needs to be removed, the taper head positioning screw 2.3 and the two compression screws 2.2 are loosened in turn, and then the part can be taken out.

[0049] Optionally or preferably, the third positioning device is in the shape of a cylinder, the third positioning device is provided with a central hole, and a threaded hole 3.1 is arranged at the front end of the central hole. The threaded hole 3.1 cooperates with the external thread at the end of the outer circle C4.3 for positioning. The third positioning device is fixed on the newly bored soft jaw, and then the outer circle C4.3 of the part to be machined 4 is cooperated with the right-handed thread at the end and is screwed clockwise to machine the part.

[0050] The present application provides a machining method and machining clamp for a T-shaped tee joint of a die forging, a new machining clamp is designed and invented, and the new machining clamp does not need to find the center of the part again, and the part can be clamped according to the clamping steps, and then the machining of the product can be started. The device is convenient and fast, can be repeatedly positioned and clamped, can be used as a high-precision clamp for turning machining of T-shaped tee joint parts of an aero-engine, is used for ensuring the position accuracy of the machined surface after re-clamping, improves the production efficiency, reduces the production cost, the product size consistency is better, and the product quality can be effectively controlled.

[0051] The application has been described in detail with reference to the drawings and embodiments, but the application is not limited to the above-mentioned embodiments, and various changes can be made within the scope of ordinary skill in the art without departing from the purpose of the application. Therefore, the application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the application.

Claims

1. A method for machining a forged T-type tee connector, used for machining precision tee connectors for aero-engines, characterized in that, The machining is performed using a machining fixture, which includes a positioning device one, a positioning device two, and a positioning device three. The machining fixture is used to clamp the workpiece (4) to be machined. The workpiece includes outer circle A (4.1), outer circle B (4.2), and outer circle C (4.3). One end of the positioning device one is a fixed end, which is fixed to the soft claw, and the other end is a clamping end. The clamping end is provided with a clamping groove (1.1) that matches the shape of the workpiece to be machined. Two mutually perpendicular arc positioning surfaces (1.2) are opened on one side of the clamping groove (1.1), and a threaded hole is opened on the other side. A clamping screw one (1.3) is installed in the threaded hole. When the two arc positioning surfaces (1.2) are clamped, they respectively engage with the arc of the workpiece (4) to achieve positioning. The clamping screw one (1.3) clamps the side of the workpiece (4). The clamping end of the positioning device two has a T-shaped groove (2.1) with the left and right ends communicating with the threaded hole. A clamping screw two (2.3) is installed in the threaded hole. 2) The narrower upper end of the T-slot (2.1) is connected to a threaded hole, in which a tapered positioning screw (2.3) is installed. The wider lower end of the T-slot (2.1) is connected to an inner hole, in which a positioning bottom cover (2.4) is installed. The positioning bottom cover (2.4) has a positioning frustum and is located in the inner hole. The outer circle A (4.1) and outer circle C (4.3) are located at the upper and lower ends of the T-slot (2.1) respectively. The inner circle with a tapered surface on the outer circle A (4.1) has a tapered surface. The hole is positioned in conjunction with the cone-shaped positioning screw (2.3). The outer circle C (4.3) is located in the inner hole at the bottom of the T-shaped groove (2.1) and contacts the positioning frustum of the positioning bottom cover (2.4). The clamping screw two (2.2) clamps the two sides of the workpiece (4) to be processed. The positioning device three is cylindrical and has a central hole. The front end of the central hole is provided with a threaded hole (3.1). The threaded hole (3.1) is positioned in conjunction with the external thread machined at the end of the outer circle C (4.3). The processing method includes the following steps: S1, place the positioning device one into the newly bored soft jaw and fix it, place the part to be processed (4) into the positioning device one for clamping and positioning, rough turn the end face and outer circle of the outer circle C (4.3) end of the part to be processed (4), drill a hole at the outer circle C (4.3) end, and then finish turn; S2, using soft jaws to hold the outer circle C (4.3) end of the part to be processed (4), and process the reference surface, outer circle, and inner hole with tapered surface of the outer circle A (4.1) end; S3, clamp the part to be processed (4) onto the positioning device 2, and fix it by positioning through outer circle A (4.1) and outer circle C (4.3), rough turn the end face and outer circle of outer circle B (4.2), machine the center hole, then finish turn the end face and outer circle and machine the external thread, and finally mill the reamer to ream the inner hole; S4, using soft jaws to hold the outer circle A (4.1) end of the part to be processed (4), process the forming surface of the outer circle C (4.3) end, and machine the external thread; S5, clamp the part to be processed (4) onto the positioning device three, rough turn the end face and outer circle of the outer circle A (4.1), rough turn the inner hole, finish turn the end face and outer circle, and finish turn the inner hole.

Images