Improved structure of rolling mill for machining thin-wall L-shaped large flange ring piece

Abstract

The utility model provides a rolling mill transformation structure for processing a thin-wall L-shaped large flange ring piece, which relates to the technical field of rolling mill related equipment for processing flanges, and comprises a support mechanism and a guide roller assembly, and the support mechanism is detachably connected with the guide roller assembly; the guide roller assembly is used for defining a limiting space with an external main roller and an equipment guide roller, and the guide roller assembly is used for being connected with an external mold body so that the mold body can be positioned in the limiting space. According to the utility model, the technical problem that in the prior art, four-point positioning of a guide roller, a core roller and a main roller on a mold cannot be realized, so that the conditions of roller climbing and circumferential shaking are easy to occur in the machining process, and further the product quality is influenced is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of rolling mill related equipment of flange processing, and particularly to a rolling mill reconstruction structure for processing thin-wall L-shaped large flange ring pieces. BACKGROUND

[0002] The thin-wall L-shaped large flange ring piece is one of the key parts of an aero-engine and a vehicle wheel hub, and it is difficult to form integrally because of its thin wall thickness and large 90° flange. Therefore, a gradual flanging and end face rolling processing method is proposed in the prior art. This method first uses the cooperation of a core roller and a main roller on a ring rolling mill to gradually flange a thin-wall rectangular ring blank, and then uses the upper cone roller of the ring rolling mill to flange and flatten the ring blank. It should be noted that this method can realize the integral forming of a thin-wall L-shaped large flange ring piece, greatly improve the production efficiency and material utilization rate, and reduce the production cost.

[0003] However, on a common double-guide roller ring rolling mill, the four-point positioning of the guide roller, the core roller, and the main roller on the die cannot be achieved, causing the die to climb the roller and the circumferential shaking of the blank during processing, which seriously affects the product quality. SUMMARY

[0004] The utility model aims at providing a rolling mill reconstruction structure for processing thin-wall L-shaped large flange ring pieces to alleviate the technical problem of the prior art that the four-point positioning of the guide roller, the core roller, and the main roller on the die cannot be achieved, which easily causes the die to climb the roller and the circumferential shaking of the blank during processing, thereby affecting the product quality.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a rolling mill reconstruction structure for processing thin-wall L-shaped large flange ring pieces, which comprises a supporting mechanism and a guide roller assembly. The supporting mechanism and the guide roller assembly are detachably connected.

[0007] The guide roller assembly is used to surround the main roller and the equipment guide roller to form a limiting space, and the guide roller assembly is used to connect with the die body to position the die body in the limiting space.

[0008] Further, the guide roller assembly comprises a guide roller body and a rotating shaft. The guide roller body is rotationally connected with the supporting mechanism through the rotating shaft.

[0009] The guide roller body is used to connect with the die body to position the die body.

[0010] Further, a limiting key is arranged on the outer wall of the guide roller body along its circumferential direction.

[0011] The limiting key is used for being connected with the groove body of the die body, so as to limit the die body.

[0012] Further, the rotating shaft is provided with a limiting insertion hole along the extending direction of the rotating shaft.

[0013] The supporting mechanism is provided with a fixing shaft, and the fixing shaft is connected with the rotating shaft by inserting the limiting insertion hole.

[0014] Further, the supporting mechanism comprises a bottom plate and a fixing beam assembly, two ends of the fixing beam assembly are connected with the corresponding bottom plate respectively, and the fixing beam assembly is provided with the fixing shaft, and the fixing beam assembly is connected with the rotating shaft through the fixing shaft.

[0015] Further, the fixing beam assembly comprises a fixing beam body, and the fixing beam body is provided with a connecting hole, and the connecting hole is connected with the bottom plate through an externally-attached screw.

[0016] Further, the bottom surface of the fixing beam body is provided with a limiting piece at both ends, and the limiting piece abuts against the corresponding bottom plate.

[0017] Further, one end of the fixing shaft is connected with the fixing beam body through a connecting piece.

[0018] Further, the fixing shaft has two, and the two fixing shafts are connected with the corresponding guide roller assemblies respectively, and the two fixing shafts are distributed at intervals, so as to make the corresponding guide roller assemblies limit and connect the die body.

[0019] Further, the fixing shaft is provided with a fixing block along the extending direction of the fixing shaft, and the fixing block is used for being clamped in the insertion slot of the limiting insertion hole, so as to fix the fixing shaft relative to the rotating shaft.

[0020] The utility model can realize the following beneficial effects:

[0021] In the first aspect, the utility model provides a kind of rolling mill reconstruction structure of processing thin-walled L-shaped big flange ring piece, including supporting mechanism and guide roller assembly, supporting mechanism and guide roller assembly detachably connect;Guide roller assembly is used to be surrounded with the limiting space of external main roller and equipment guide roller, and guide roller assembly is used to be connected with external die body, so that die body is positioned in limiting space.

[0022] In the utility model, the guide roller assembly is arranged on the supporting mechanism, and the guide roller assembly can be selected according to actual use demand and connected with the supporting mechanism, and when installing, the installation position of the guide roller assembly is selected first to meet the need of fixing the mold body through the guide roller assembly, the main roller and the equipment guide roller, and then four-point or five-point positioning of the mold body is realized, and the situation of climbing and shaking in the machining process is avoided.

[0023] Compared with the prior art, the rolling mill transformation structure for processing the thin-wall L-shaped large flange ring piece provided by the utility model realizes at least four-point positioning of the mold body through the guide roller assembly arranged at the corresponding position of the supporting mechanism and the cooperation of the guide roller assembly with the main roller and the equipment guide roller, and effectively avoids the situation of climbing and circumferential shaking in the machining process.

[0024] In conclusion, the utility model at least alleviates the technical problem that the prior art cannot realize four-point positioning of the mold by the guide roller, the core roller and the main roller, and the situation of climbing and circumferential shaking in the machining process is caused, and then the product quality is affected. ACCURACY OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 The utility model provides the three-dimensional schematic view of the rolling mill transformation structure for processing the thin-wall L-shaped large flange ring piece;

[0027] Figure 2 The utility model provides the structure schematic view of the fixed beam part of the rolling mill transformation structure for processing the thin-wall L-shaped large flanne ring piece;

[0028] Figure 3 The utility model provides the structure schematic view of the guide roller part of the rolling mill transformation structure for processing the thin-wall L-shaped large flanne ring piece;

[0029] Figure 4 The utility model provides the guide roller and mold assembly schematic view of the rolling mill transformation structure for processing the thin-wall L-shaped large flanne ring piece;

[0030] Figure 5 The utility model provides the local schematic view of the rolling mill transformation structure for processing the thin-wall L-shaped large flanne ring piece.

[0031] Icon: 1-main roller; 2-bottom plate; 3-equipment guide roller; 4-fixed beam assembly; 41-fixed beam body; 411-connection hole; 412-limiting piece; 42-fixed shaft; 421-fixed block; 422-connection piece; 5-guide roller assembly; 51-guide roller body; 52-rotation shaft; 521-limiting hole; 53-limiting key; 6-mold body; 61-groove body. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0034] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element 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. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "installation", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication. For ordinary skilled person in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0038] The utility model discloses some implementation manners, which will be described in detail below in combination with the drawings. The following examples and features in the examples can be combined with each other without conflict.

[0039] Example 1

[0040] The embodiment provides a rolling mill transformation structure for processing a thin-wall L-shaped large flange ring piece, which comprises a supporting mechanism and a guide roller assembly 5. Figure 1 The rolling mill transformation structure for processing the thin-wall L-shaped large flange ring piece comprises a supporting mechanism and a guide roller assembly 5, wherein the supporting mechanism is detachably connected with the guide roller assembly 5; the guide roller assembly 5 is used for surrounding the main roller 1 and the equipment guide roller 3 to form a limiting space, and the guide roller assembly 5 is used for being connected with the mold body 6, so that the mold body 6 is positioned in the limiting space.

[0041] In summary, the embodiment of the utility model at least alleviates the technical problem that the product quality is affected due to the fact that the guide roller, the core roller and the main roller 1 cannot achieve four-point positioning of the mold, and the situation of roll climbing and circumferential shaking easily occurs in the processing process in the prior art.

[0042] In the embodiment of the utility model, the guide roller assembly 5 is arranged on the supporting mechanism, and the number of guide roller assemblies 5 can be selected according to actual use requirements and connected with the supporting mechanism. When installing, the installation position of the guide roller assembly 5 is selected first to meet the need of fixing the mold body 6 through the guide roller assembly 5, the main roller 1 and the equipment guide roller 3, so that four-point or five-point positioning of the mold body 6 is achieved, and the situation of roll climbing and shaking in the processing process is avoided.

[0043] Compared with the prior art, the rolling mill transformation structure for processing the thin-wall L-shaped large flange ring piece provided by the embodiment of the utility model sets the guide roller assembly 5 at the corresponding position of the supporting mechanism, and cooperates the guide roller assembly 5 with the main roller 1 and the equipment guide roller 3, so that the mold body 6 can be positioned at least four points, and the situation of roll climbing and circumferential shaking in the processing process is effectively avoided.

[0044] In the optional implementation manner of the embodiment, the guide roller assembly 5 comprises a guide roller body 51 and a guide roller cover 52. Figure 3 And Figure 4The guide roller assembly 5 comprises a guide roller body 51 and a rotating shaft 52, the guide roller body 51 is rotatably connected with the supporting mechanism through the rotating shaft 52; the guide roller body 51 is used to be connected with the mold body 6 to realize the positioning of the mold body 6.

[0045] Specifically, the guide roller body 51 is rotatably connected with the supporting mechanism through the rotating shaft 52, and preferably, the rotating shaft 52 is arranged at the center of the guide roller body 51 in the vertical direction, and the outer surface of the guide roller body 51 is used to be connected with the mold body 6 to realize the positioning of the mold body 6 together with the main roller 1 and the two device guide rollers 3.

[0046] Further, referring to Figure 3 , Figure 4 or Figure 5 , the outer wall of the guide roller body 51 is provided with a limiting key 53 along the circumference thereof; the limiting key 53 is used to be connected with the groove 61 of the mold body 6 to limit the mold body 6.

[0047] Specifically, the outer wall of the guide roller body 51 is provided with a limiting key 53 along the circumference thereof; and preferably, the limiting key 53 is arranged in the lower part of the side wall of the guide roller body 51 along the circumference thereof, and correspondingly, the edge of the mold body 6 is provided with a groove 61 along the circumference thereof, the limiting key 53 is insertedly connected with the groove 61 to make the mold body 6 more stably arranged in the limiting space.

[0048] In an optional embodiment of the present embodiment, referring to Figure 3 , the rotating shaft 52 is provided with a limiting insertion hole 521 along the extension direction thereof; the supporting mechanism is provided with a fixed shaft 42, the fixed shaft 42 is connected with the rotating shaft 52 by inserting the limiting insertion hole 521.

[0049] Specifically, the rotating shaft 52 is provided with a limiting insertion hole 521 along the extension direction thereof, that is, the limiting insertion hole 521 is arranged at the center of the rotating shaft 52 in the vertical direction, and the fixed shaft 42 is detachably connected with the rotating shaft 52 through the limiting insertion hole 521.

[0050] Further, referring to Figure 1 , the supporting mechanism comprises a bottom plate 2 and a fixed beam assembly 4, the two ends of the fixed beam assembly 4 are respectively connected with the corresponding bottom plate 2, and the fixed beam assembly 4 is provided with a fixed shaft 42, the fixed beam assembly 4 is connected with the rotating shaft 52 through the fixed shaft 42.

[0051] Specifically, the bottom plate 2 is provided with two groups, and the two groups of bottom plates 2 are oppositely distributed, and the fixed beam assembly 4 is arranged between the two bottom plates 2, and the upper surface of the fixed beam assembly 4 is provided with the fixed shaft 42 used to be connected with the rotating shaft 52.

[0052] Further, referring to Figure 2The fixed beam assembly 4 comprises a fixed beam body 41, which is provided with connecting holes 411 connected with the bottom plate 2 through externally connected screws.

[0053] Specifically, the two ends of the fixed beam body 41 are respectively provided with connecting holes 411, and each end of the fixed beam body 41 is provided with three connecting holes 411, which are detachably connected with the bottom plate 2 through screws.

[0054] Further, referring to Figure 2 , the two ends of the bottom surface of the fixed beam body 41 are provided with limiting pieces 412, which abut against the corresponding bottom plate 2.

[0055] Specifically, the two ends of the bottom surface of the fixed beam body 41 are provided with limiting pieces 412, which abut against the corresponding bottom plate 2; preferably, the fixed beam body 41 is fixed in the corresponding connecting holes 411 through the limiting pieces 412 at the two ends to avoid sliding off from the two sides of the bottom plate 2.

[0056] In the optional implementation of the embodiment, referring to Figure 2 , one end of the fixed shaft 42 is connected with the fixed beam body 41 through a connecting piece 422.

[0057] Specifically, the bottom of the fixed shaft 42 is connected with the fixed beam body 41 through the connecting piece 422, and the connecting piece 422 is preferably detachably connected with the fixed beam body 41 to facilitate replacement of different specifications of the fixed shaft 42.

[0058] Further, referring to Figure 1 , Figure 2 or Figure 5 , the fixed shaft 42 has two, and the two fixed shafts 42 are respectively connected with the corresponding guide roller assemblies 5, and the two fixed shafts 42 are spaced apart to limit and connect the corresponding guide roller assemblies 5 to the mold body 6.

[0059] Specifically, the fixed shaft 42 has two, and the two fixed shafts 42 are respectively connected with the corresponding guide roller assemblies 5; it needs to be emphasized that the positions of the two fixed shafts 42 on the fixed beam body 41 need to be determined according to the specific specifications of the mold body 6.

[0060] Specifically referring to Figure 5, and the horizontal direction through the point o is the x-axis and the vertical direction is the y-axis. Due to the symmetry of the x-axis, only the guide roller body 51 in the positive y direction is considered. The axis coordinates of the guide roller body 51 are o” (xh1, yh1). According to the tangent relationship between the guide roller body 51 and the outer mold body 6, the distance between the axis o’ of the mold body 6 and the axis o” of the guide roller body 51 can be expressed as the sum of the radius Rd of the mold body 6 and the radius Rh of the guide roller body 51. Therefore, the circle with the center o’ and the radius Rd+Rh can be expressed as follows:

[0061] Equation 1:

[0062] where y h1 can be expressed as:

[0063] Equation 2: y h1 = (x h1 -R m -R d ) tan α.

[0064] In the equation, α is the angle between the line connecting the axis o” of the guide roller body 51 and the axis o’ of the mold body 6 and the x-axis. The coordinates of the axis o’ of the mold body 6 can be obtained by combining Equation 1 and Equation 2.

[0065] Equation 3:

[0066] Based on the symmetry of the x-axis, the axis coordinates of the other guide roller body 51 can be determined by the following equation:

[0067] Equation 4:

[0068] To ensure that the fixed beam body 41 does not interfere with the mold body 6, the C point of the rotating shaft 52 of the guide roller body 51 cannot exceed the outer diameter A point of the mold body 6 in the negative direction of the x-axis, and the other side of the guide roller body 51 is the same. To ensure that the two newly added guide roller bodies 51 do not interfere with each other, the B point on the limiting key 53 of the guide roller body 51 cannot cross the x-axis in the y-axis direction of the quadrant, and the other side of the guide roller body 51 is the same. Wherein, the x coordinate of A point is R m + 2R d ; the x coordinate of C point is x h1 -R hc , R hc is the radius of the rotating shaft of the guide roller; and the equation of the outer diameter circle of the limiting key 53 is:

[0069] Equation 5:

[0070] In the equation, R h2 is the radius of the limiting key 53, so the y coordinate of B point is y h1-R h2 To meet the non-interference requirement, the following conditions must be met:

[0071] Formula 6:

[0072] And if x h1 If equation 6 is not satisfied, then the value of α is too large, and if y h1 If equation 6 is not satisfied, then the value of α is too small.

[0073] In an optional implementation of this embodiment, refer to Figure 2 or Figure 3 The fixed shaft 42 is provided with a fixing block 421 along its extension direction. The fixing block 421 is used to engage with the slot opened in the limiting insertion hole 521 to fix the fixed shaft 42 relative to the rotating shaft 52.

[0074] Specifically: There are two fixing blocks 421, and the two fixing blocks 421 are symmetrically distributed along the fixing axis 42. The corresponding slots are opened in the limiting insertion hole 521. By inserting the corresponding fixing block 421 into the matching slot, the fixing axis 42 is fixed relative to the rotating axis 52.

[0075] During use, first, determine the diameters of the main roller, the mold, and the newly added guide roller. The diameter of main roller 1 is R. m =400mm, the diameter of mold body 6 is R d = 325mm. The diameter of the guide roller body is R. h1 =145mm, the diameter of the limit key 53 is R h2 =162mm, the diameter of the rotating shaft 52 is R hc =49.5mm.

[0076] Secondly, the coordinates of the newly added guide roller axis are determined. The value of α is tentatively set at 25°. Based on equations 3 and 4, the coordinates of the axis of the guide roller body 51 on one side are determined to be (1150, 200), and the coordinates of the axis of the guide roller body 51 on the other side are determined to be (1150, -200). The result is verified by equation 6. h1 =x h2 =1150mm>R m +2R d +R hc =1099.5mm, y h1 =|y h2 |=200mm>R h2 =162mm, therefore, the value of α meets the requirements, and the guide roller body 51 can be positioned and assembled according to the calculated coordinates.

[0077] Again, the progressive flanging prepares the blank of the horn shape, after the fixed guide roller assembly 5 is assembled, the heated rectangular ring blank is fixed in the mold body 6, the main roller 1, the equipment guide roller 3 and the guide roller body 51 are five-point positioned to the mold body 6, which limits the circumferential shaking of the mold body 6; the limiting key 53 of the guide roller body 51 cooperates with the groove body 61 of the mold body 6, which limits the climbing of the mold body 6. In use, the main roller 1 rotates the mold body 6 and the blank together at an angular velocity of 60 rad / min, at the same time, the equipment guide roller 3 extrudes the blank at a horizontal feed speed of 2 mm / s, and the port of the rectangular ring blank is progressively flanged to 30°.

[0078] Finally, the end face is rolled and heat treated, and the progressive flanging is completed. Immediately after the progressive flanging, the upper cone roller of the ring rolling mill is used to roll down the flanged port of the blank until 90°, at this time, the limiting key 53 cooperates with the groove body 61 of the mold body 6, which limits the unilateral warping of the mold body 6; and the annealing heat treatment of the forging is carried out at a heating temperature of 780-790℃, and after holding for 80-90min, air cooling is carried out.

[0079] Finally, it should be pointed out that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts of each embodiment can be referred to. The above embodiments in the specification are used to illustrate the technical solutions of the utility model, but not to limit them. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacement to some or all of the technical features. Such modifications or replacements do not change the essence of the corresponding technical solutions out of the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A mill modification structure for processing thin-walled L-shaped large flange rings, characterized in that, It includes a support mechanism and a guide roller assembly (5), wherein the support mechanism is detachably connected to the guide roller assembly (5); The guide roller assembly (5) is used to form a limiting space with the external main roller (1) and the equipment guide roller (3), and the guide roller assembly (5) is used to connect with the external mold body (6) so that the mold body (6) is positioned within the limiting space.

2. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 1, characterized in that, The guide roller assembly (5) includes a guide roller body (51) and a rotating shaft (52), and the guide roller body (51) is rotatably connected to the support mechanism through the rotating shaft (52); The guide roller body (51) is used to connect with the mold body (6) to position the mold body (6).

3. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 2, characterized in that, The outer wall of the guide roller body (51) is provided with a limiting key (53) along its circumference; The limiting key (53) is used to connect with the groove (61) opened in the mold body (6) to limit the mold body (6).

4. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 2, characterized in that, The rotating shaft (52) has a limiting insertion hole (521) along its extension direction; The support mechanism is provided with a fixed shaft (42), which is connected to the rotating shaft (52) by inserting into the limiting hole (521).

5. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 4, characterized in that, The support mechanism includes a base plate (2) and a fixed beam assembly (4). The two ends of the fixed beam assembly (4) are respectively connected to the corresponding base plate (2), and the fixed beam assembly (4) is provided with the fixed shaft (42). The fixed beam assembly (4) is connected to the rotating shaft (52) through the fixed shaft (42).

6. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 5, characterized in that, The fixed beam assembly (4) includes a fixed beam body (41), which has a connecting hole (411) and is connected to the base plate (2) by an external screw.

7. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 6, characterized in that, The bottom surface of the fixed beam body (41) is provided with limiting members (412) at both ends, and the limiting members (412) abut against the corresponding bottom plate (2).

8. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 6, characterized in that, One end of the fixed shaft (42) is connected to the fixed beam body (41) via a connector (422).

9. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 8, characterized in that, There are two fixed shafts (42), each of which is connected to a corresponding guide roller assembly (5), and the two fixed shafts (42) are spaced apart to limit the connection between the corresponding guide roller assembly (5) and the mold body (6).

10. The rolling mill modification structure for processing thin-walled L-shaped large flange rings according to claim 8, characterized in that, The fixed shaft (42) is provided with a fixing block (421) along its extension direction. The fixing block (421) is used to engage with the slot opened in the limiting hole (521) to fix the fixed shaft (42) relative to the rotating shaft (52).

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