A taper roller bearing inner ring blank mold

Abstract

The utility model relates to a kind of taper roller bearing inner ring blanking mould, comprising: upsetting die and lower pad, the upsetting die inside is the cavity of accommodating blank up and down through, upsetting die inner diameter is multi-section special-shaped structure design, external shape is cylindrical;Upsetting die cavity bottom is detachably matched with lower pad, by installing lower pad, lower pad upper end is enclosed with upsetting die cavity circumference inner diameter and becomes an open blank mould with open top, bottom closed;The blanking mould is optimized by structure, blank height is adjusted using combined matching structure, relative to the difference of the original blanking mould is, short height (less than 120mm) blank can be blanked on 2.0t air hammer, improve the short blank in the previous hammer cannot be blanked drawback, the blanking of the taper inner ring forging is realized by the structure optimization of the mould, and forging material utilization rate and turning efficiency are also improved.

Description

Technical Field

[0001] This utility model relates to a tooling for forging bearing blanks, specifically a blanking mold for the inner ring of a tapered roller bearing, belonging to the field of bearing forging technology. Background Technology

[0002] In the machining of tapered roller bearing inner ring forgings, taking the FL-306 / 660X3 / HG22-YJ tapered inner ring as an example, based on the size and weight of the forging, it should be rolled and expanded on a 2.0t hammer-1200 ring rolling mill. However, the air hammer forging process requires the assistance of a robotic arm on the operating cart. This limits the forging height, allowing only forgings larger than 120mm to be processed. Shorter forgings smaller than 120mm cannot be forged on the hammer, thus increasing the obstacles in the forging of tapered roller bearing inner rings. Utility Model Content

[0003] In view of the problem that the blank height is limited during the blanking process of forging the inner ring of tapered roller bearings, the purpose of this utility model is to provide a blanking mold for the inner ring of tapered roller bearings. The mold has a combined fitting structure design, which makes it easy for relatively short blanks to be blanked on a 2.0t air hammer, thus improving the previous disadvantage that short blanks could not be blanked on the hammer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a blanking mold for inner ring of a tapered roller bearing, comprising: an upsetting mold and a lower pad, wherein the interior of the upsetting mold is a cavity that runs vertically through to accommodate the blank, the inner diameter of the upsetting mold is a multi-segment irregular structure design, and the outer shape is cylindrical; the lower pad is detachably fitted at the bottom of the cavity of the upsetting mold, and by installing the lower pad, the upper end of the lower pad and the inner circumference of the cavity of the upsetting mold are enclosed to form an open blanking mold with an open top and a closed bottom; Furthermore, the inner diameter of the upsetting die comprises three sections from top to bottom: a first straight slope section, a second curved section, and a third stepped section; these three sections are seamlessly connected to form the entire inner diameter surface of the upsetting die. Furthermore, the lower pad is fitted into the third stepped section of the upsetting die; the lower pad is configured with a "convex" shaped cross-section, and the outer diameter of the "convex" shaped lower pad includes: a first side elevation, a horizontal surface, and a second side elevation; the third stepped section of the upsetting die forms mating surfaces that mate with the three surfaces of the outer diameter of the "convex" shaped lower pad, namely the first mating surface, the second mating surface, and the third mating surface; the lower pad is precisely inserted into the third stepped section of the upsetting die for positioning with the upsetting die; Furthermore, the first side surface of the lower pad is spaced apart from the first mating surface of the upsetting die, and the horizontal surface of the lower pad is in direct contact with the second mating surface of the upsetting die. Furthermore, the second side facade of the lower pad is designed with a 5° slope, making the second side facade a tapered design that is smaller at the top and larger at the bottom; Furthermore, the second side elevation of the lower pad is designed with a rounded chamfer between it and the horizontal plane; Furthermore, the first straight slope section of the upsetting die is designed with a 10° slope, so that the area forms an inverted cone structure that is larger at the top and smaller at the bottom; Furthermore, the inner end point of the upper surface of the third stepped section of the upsetting die is connected to the first mating surface, and the distance between the outer end point of the upper surface and the lower end point of the slope of the first straight slope section is the second arc curve section. Furthermore, the curve of the second arc curve region segment forms a concave arc curve with a concave angle of 8°, and the arc of this curve is set to R50.06.

[0005] Using the above-mentioned blanking mold, after the blank is heated and before the rolling process, the forging needs to be forged into the required conical shape using this mold. In the specific blanking operation, the lower pad and the upsetting mold are combined together. The upsetting mold and the lower pad are positioned by a 5° inclined plane. The blank is placed into the mold and filled into the inner cavity after being upset by an air hammer. At this time, the shape of the blank is completely consistent with the shape of the inner cavity of the mold. The combined mold is lifted, the lower pad is removed from the mold, and then the upsetting mold is flipped to punch out the forging blank.

[0006] The beneficial effects of this utility model are: This billet-making mold, through structural optimization, adopts a combined fitting structure to adjust the billet height. The difference from the original billet-making mold is that it allows billets with short heights (less than 120mm) to be billeted on a 2.0t air hammer, which improves the previous drawback that short billets could not be billeted on the hammer. This mold realizes the billet-making of conical inner ring forgings through structural optimization, while also improving the material utilization rate of forgings and machining efficiency. Attached Figure Description

[0007] Figure 1 This is an assembly drawing of the blank-making mold of this utility model.

[0008] Figure 2 for Figure 1 The structure diagram of the upsetting die.

[0009] Figure 3 for Figure 1 The diagram shows the structure of the lower pad.

[0010] In the figure, 1. Upsetting mold, 2. Lower pad, 3. Cavity, 2.1. Upper end of lower pad, a. First straight slope section, b. Second arc curve section, c. Third stepped section, 2.2. First side elevation, 2.3. Horizontal plane, 2.4. Second side elevation, 1.1. First mating surface, 1.2. Second mating surface, 1.3. Third mating surface, 1.4. Inner end point of the upper surface, 1.5. Outer end point of the upper surface, 1.6. Lower end point of the slope of the first straight slope section, 1.7. Concave arc curve. Detailed Implementation

[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0012] like Figure 1-3 The present invention relates to a die for making inner ring blanks of tapered roller bearings, comprising: an upsetting die 1 and a lower pad 2. The upsetting die 1 has an internal cavity 3 that runs vertically through the interior to accommodate the blank. The inner diameter of the upsetting die 1 is designed with a multi-segment irregular structure, and the outer shape is cylindrical. The lower pad 2 is detachably fitted at the bottom of the cavity 3 of the upsetting die. By installing the lower pad 2, the upper end 2.1 of the lower pad is enclosed with the inner circumference of the cavity 3 of the upsetting die to form an open blank die with an open top and a closed bottom. Furthermore, the inner diameter of the upsetting die 1 includes three sections from top to bottom: the first straight slope section a, the second arc curve section b, and the third stepped section c; the three sections are connected together to form the entire inner diameter surface of the upsetting die 1. Furthermore, the lower pad 2 is fitted into the third stepped section c of the upsetting mold 1; the lower pad 2 is configured with a "convex" shaped cross-section, and the outer diameter of the "convex" shaped lower pad includes: a first side elevation 2.2, a horizontal surface 2.3, and a second side elevation 2.4; the third stepped section c of the upsetting mold forms three mating surfaces that mate with the outer diameter of the "convex" shaped lower pad, namely the first mating surface 1.1, the second mating surface 1.2, and the third mating surface 1.3; the lower pad 2 is precisely inserted into the third stepped section c of the upsetting mold and positioned with the upsetting mold 1; Furthermore, the first side surface 2.2 of the lower pad 2 is spaced apart from the first mating surface 1.1 of the upsetting die 1, and the horizontal surface 2.3 of the lower pad 2 is in direct contact with the second mating surface 1.2 of the upsetting die 1; Furthermore, the gap between the first side surface 2.2 of the lower pad 2 and the first mating surface 1.1 of the upsetting die 1 is set to 1mm.

[0013] Furthermore, the second side face 2.4 of the lower pad 2 is designed with a 5° slope, so that the second side face 2.4 forms a conical design with a smaller top and a larger bottom; positioning is achieved by the 5° slope of the lower pad 2 cooperating with the third mating surface 1.3 of the upsetting mold 1; Furthermore, the second side elevation 2.4 of the lower pad 2 is designed with a rounded chamfer of R1 between it and the horizontal surface 2.3. The rounded chamfer design ensures that the chamfer between the lower pad 2 and the second mating surface 1.2 and the third mating surface 1.3 of the block mold will not interfere with the assembly. Furthermore, the first straight slope section a of the upsetting die 1 is designed as a 10° slope, so that the area forms an inverted cone structure that is larger at the top and smaller at the bottom, forming an outward flaring shape, which facilitates the insertion of the billet; Furthermore, the inner end point 1.4 of the upper end face of the third stepped section c of the upsetting die 1 is connected to the first mating surface 1.1, and the distance between the outer end point 1.5 of the upper end face and the lower end point 1.6 of the slope of the first straight slope section is the second arc curve section b. Furthermore, the curve of the second arc curve region segment b forms a concave arc curve 1.7 with a concave angle of 8°, and the arc of this curve is set to R50.06; the specific value is optimized according to the required size of the finished forging.

[0014] Using the above-mentioned blanking mold, after the blank is heated and before the rolling process, the forging needs to be forged into the required conical shape using this mold. In the specific blanking operation, the lower pad 2 is combined with the upsetting mold 1. The upsetting mold 1 and the lower pad 2 are positioned by a 5° inclined plane. The material segment is placed in the mold and filled into the inner cavity after being upset by an air hammer. At this time, the shape of the blank is completely consistent with the shape of the inner cavity of the mold. The combined mold is lifted, the lower pad 2 is removed from the mold, and then the upsetting mold 1 is flipped to punch out the forging blank.

[0015] It should be noted that in this solution, the height of the upsetting die blank occupies the space of the first straight slope section and the second arc curve section. Specifically, in this embodiment, the total height of the first straight slope section and the second arc curve section of the upsetting die is 103mm. Therefore, the height of the blank that the die can accommodate is 103mm, which is suitable for making short blanks less than 120mm. When the required forging requires blanks of other height dimensions, another die with the same height dimension as the blank is used.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A die for preparing the inner ring of a tapered roller bearing, characterized in that, include: The upsetting mold and the lower pad are provided. The upsetting mold has a cavity that runs through the top and bottom to accommodate the blank. The inner diameter of the upsetting mold has a multi-segment irregular structure design, and the outer shape is cylindrical. The lower pad is detachably fitted at the bottom of the cavity of the upsetting mold. By installing the lower pad, the upper end of the lower pad is enclosed with the inner circumference of the cavity of the upsetting mold to form an open blank mold with an open top and a closed bottom.

2. The die for making a tapered roller bearing inner ring according to claim 1, characterized in that: The inner diameter of the upsetting die consists of three sections from top to bottom: the first straight slope section, the second curved section, and the third stepped section; the three sections are connected to form the entire inner diameter surface of the upsetting die.

3. The die for making a tapered roller bearing inner ring according to claim 2, characterized in that: The lower pad is fitted into the third stepped section of the upsetting die; the lower pad is configured with a "convex" shaped cross-section, and the outer diameter of the "convex" shaped lower pad includes a first side elevation, a horizontal surface, and a second side elevation; the third stepped section of the upsetting die forms three mating surfaces that mate with the outer diameter of the "convex" shaped lower pad, namely the first mating surface, the second mating surface, and the third mating surface; the lower pad is precisely inserted into the third stepped section of the upsetting die and positioned with the upsetting die.

4. The die for making a tapered roller bearing inner ring according to claim 3, characterized in that: The first side surface of the lower pad is spaced apart from the first mating surface of the upsetting die, and the horizontal surface of the lower pad is in direct contact with the second mating surface of the upsetting die.

5. The die for making a tapered roller bearing inner ring according to claim 3, characterized in that: The second side facade of the lower pad is designed with a 5° slope, making the second side facade a tapered design that is smaller at the top and larger at the bottom.

6. The die for making a tapered roller bearing inner ring according to claim 3, characterized in that: The first straight slope section of the upsetting die is designed with a 10° slope, which makes the area form an inverted cone structure that is larger at the top and smaller at the bottom.

7. A die for preparing the inner ring of a tapered roller bearing according to claim 6, characterized in that: The inner end point of the upper surface of the third stepped section of the upsetting die is connected to the first mating surface. The distance between the outer end point of the upper surface and the lower end point of the slope of the first straight slope section is the second arc curve section.

8. A die for preparing the inner ring of a tapered roller bearing according to claim 7, characterized in that: The curve of the second arc curve region forms a concave arc curve with a concave angle of 8°, and the arc of the curve is set to R50.06.

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