Joint bearing forming die and processing technology

Abstract

The application provides a die for forming a knuckle bearing and a processing technology, which comprises an upper die, a lower die, a hole die, a lower base and an upper top plate, the upper top plate is connected with the lower base through guide columns, and the upper top plate is moved along the guide columns through a hydraulic machine; the lower base is installed on the lower base, the lower die is installed on the lower base, a core shaft is inserted into the center of the lower die, and the core shaft is used for installing an inner ring of the knuckle bearing; a hole die fixing plate is installed on the upper top plate, the upper die is installed on the hole die fixing plate, the hole die is installed outside the upper die, and the outside of the hole die is connected with the hole die fixing plate; an outer ring blank of the knuckle bearing is placed on the surface of the lower die, the outer ring blank is located outside the inner ring, the outer ring blank outside the inner ring is assembled with the inner ring through the downward movement of the hole die, and the hole die is internally provided with a pit type micro-texture. The application can reduce the deformation times of the metal outer ring and reduce the contact stress of the self-lubricating liner in the forming process.

Description

TECHNICAL FIELD

[0001] The present application relates to the forming die of joint bearing or the processing field of joint bearing, in particular to a joint bearing forming die and processing technology. BACKGROUND

[0002] The integral joint bearing belongs to a kind of sliding bearing, and it is different from the former three that integral joint bearing is first processed inner ring, and outer ring forming and assembly are carried out simultaneously, the compact structure of bearing after forming, strong load capacity, therefore more widely applicable.It is composed of two parts, respectively an inner ring with outer spherical surface, and the outer ring matched therewith, in aerospace, railway transportation industry, integral bearing plays an important role.Integral self-lubricating joint bearing is bonded with a layer of self-lubricating pad material on the inner surface of outer ring of integral joint bearing, and self-lubricating material plays the role of reducing friction and prolonging life, maintenance-free, saving a lot of manpower.The forming process is mainly based on outer ring forming at present.In the forming process, the damage of inner ring and self-lubricating pad should be small, and the inner ring and outer ring should maintain a certain clearance after forming, so the requirement of assembly process is very strict.

[0003] The prior art discloses a kind of integral self-lubricating joint bearing without inner ring action die forming die and forming method, bearing outer ring inner surface forming process and bearing clearance controllable, but it is more complex to shape joint bearing outer ring after forming, and the damage of pad is greater.The prior art discloses a kind of integral self-lubricating joint bearing roll forming method, and the bearing manufactured has the advantages of long service life and high reliability, but the forming operation is complex, and the equipment cost is higher.The prior art discloses a kind of integral self-lubricating joint bearing device and its folding forming method, changes the traditional outer ring forming mode, improves product pass rate, improves product use performance and service life, but the forming method is complex, and the operation accuracy is required. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a joint bearing forming die and processing technology, which can reduce the deformation frequency of the metal outer ring, reduce the contact stress of the self-lubricating pad during the forming process, reduce the rebound phenomenon of the outer ring after forming, effectively improve the product yield of joint bearing, and ensure the use performance and service life of joint bearing.

[0005] The present application achieves the above technical purposes by the following technical means.

[0006] A joint bearing forming die, comprising an upper die, a lower die, a hole die, a lower base and an upper top plate,

[0007] The upper top plate and the lower bottom plate are connected by guide columns, and the upper top plate is moved along the guide columns by a hydraulic machine execution structure; a lower base is installed on the lower bottom plate, a lower die is installed on the lower base, a core shaft is inserted into the center of the lower die, and the core shaft is used to install the inner ring of a knuckle bearing;

[0008] A hole die fixing plate is installed on the upper top plate, an upper die is installed on the hole die fixing plate, a hole die is installed on the outer side of the upper die, and the outer side of the hole die is connected with the hole die fixing plate; the outer ring blank of the knuckle bearing is placed on the surface of the lower die, and the outer ring blank is located outside the inner ring; the outer ring blank outside the inner ring is assembled by the downward movement of the hole die; and the inner part of the hole die is provided with a pit type micro-texture.

[0009] Further, the inner cavity of the hole die is provided from top to bottom with a shaping section in the shape of a round hole, a forming section in the shape of a tapered hole, and a lead-in section in the shape of a round hole.

[0010] Further, the surfaces of the forming section and the shaping section are both provided with a pit type micro-texture.

[0011] Further, the height of the pit type micro-texture is 15-35 um, the diameter of the pit type micro-texture is 50-120 um, and the occupancy rate of the pit type micro-texture is 15%-25%.

[0012] Further, the pit type micro-texture is filled with a solid composite lubricant, and the solid composite lubricant is a mixture of molybdenum disulfide, manganese disulfide and graphene.

[0013] Further, the mass ratio of molybdenum disulfide, manganese disulfide and graphene in the solid composite lubricant is 2:3:0.5.

[0014] Further, the upper die is installed on the hole die fixing plate by a polyurethane rubber pad, so as to facilitate the separation of the upper die and the end face of the inner ring.

[0015] Further, it further includes a floating fixing plate and a spring, the floating fixing plate is provided with an installation hole in the middle, which is in gap cooperation with the outer ring blank of the knuckle bearing, and is used for positioning the outer ring blank of the knuckle bearing; the spring is installed between the floating fixing plate and the lower bottom plate, and is used for resetting the floating fixing plate.

[0016] A processing technology of a knuckle bearing forming die, comprising the following steps:

[0017] The inner ring is placed on the upper end face of the lower die through the core shaft;

[0018] After the outer ring blank is placed on the end surface of the lower die through the mounting hole of the floating fixing plate, the outer ring blank is placed outside the inner ring; a self-lubricating lining is adhered to the inner surface of the outer ring blank; the concave micro-texture is processed on the surface of the forming section and the shaping section of the hole die, and the solid composite lubricant is filled in the concave micro-texture;

[0019] The upper top plate is moved along the guide column by the hydraulic machine execution mechanism, so that the hole die uniformly extrudes downward; the outer ring blank outside the inner ring is assembled by the hole die through the introduction section, the forming section and the shaping section in sequence;

[0020] When the inner ring is attached to the upper die, the polyurethane rubber pad is compressed; after pressure maintaining for 5-10 minutes, the hydraulic machine execution mechanism is depressurized, and the inner ring is separated from the upper die by the elastic return force of the polyurethane rubber pad in the upper die.

[0021] The beneficial effects of the present application are:

[0022] 1. The joint bearing forming die and processing technology disclosed by the present application can reduce the deformation times of the metal outer ring, reduce the contact stress of the self-lubricating lining in the forming process, and reduce the springback phenomenon of the outer ring after forming.

[0023] 2. The joint bearing forming die and processing technology disclosed by the present application can effectively improve the yield of the joint bearing product, and ensure the use performance and service life of the joint bearing. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 It is a sectional view of the joint bearing forming die disclosed by the present application.

[0026] Figure 2 It is a sectional view of the initial and end forming of the joint bearing.

[0027] Figure 3 It is a micro-texture appearance schematic diagram provided by the present application.

[0028] In the drawings:

[0029] 1 - upper die plate; 2 - guide sleeve; 3 - hole die fixing plate; 4 - hole die; 5 - shaping section; 6 - forming section; 7 - lead-in section; 8 - floating fixing plate; 9 - lower die; 10 - mandrel; 11 - lower base; 12 - polyurethane rubber pad; 13 - stud; 14 - upper die; 15 - dimple type micro-texture; 16 - inner ring; 17 - self-lubricating gasket; 18 - outer ring blank; 19 - spring; 20 - lower base plate. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements having the same function. The embodiments described below are exemplary and are intended to explain the present application, and are not intended to limit the present application.

[0031] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and are 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 limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] As Figure 1As shown, the joint bearing forming die of the present application comprises a forming module and a positioning module; the forming module comprises a hole die 4, an upper die 14 and a lower die 9; the positioning module comprises an upper top plate 1, a lower bottom plate 20, a mandrel 10, a floating positioning plate 8, a hole die positioning plate 3 and a guide sleeve 2; the upper top plate 1 is connected with the lower bottom plate 20 through guide columns, and the upper top plate 1 is moved along the guide columns through the execution of a hydraulic machine; the upper top plate 1 is provided with the guide sleeve 2, and the guide column is matched with the guide sleeve 2; the lower bottom plate 20 is installed with a lower base 11, the lower base 11 is installed with the lower die 9, the lower die 9 is provided with a through hole penetrating through the thickness direction thereof, and the mandrel 10 is installed in the lower die 9 in the form of interference fit. The mandrel 10 is inserted into the center of the lower die 9, and the mandrel 10 is used for installing the inner ring 16 of the joint bearing;

[0034] The upper top plate 1 is installed with a hole die fixing plate 3, the hole die fixing plate 3 is installed with the upper die 14, and the upper die 14 is fixed by the studs 13 on the hole die fixing plate 3. The upper die 14 is installed on the hole die fixing plate 3 through a polyurethane rubber pad 12, so as to facilitate the separation of the upper die 14 and the end surface of the inner ring 16. The upper die 14 is installed with the hole die 4 on the outside, and the outside of the hole die 4 is connected with the hole die fixing plate 3; the outer ring blank 18 of the joint bearing is placed on the surface of the lower die 9, and the outer ring blank 18 of the joint bearing is located outside the inner ring 16, and the outer ring blank 18 located outside the inner ring 16 is assembled with the inner ring 16 through the downward movement of the hole die 4; the inner part of the hole die 4 is provided with a pit type micro-texture 15. The floating fixing plate 8 is provided with an installation hole matched with the outer ring blank 18 of the joint bearing in the gap, so as to position the outer ring blank 18 of the joint bearing; the spring 19 is installed between the floating fixing plate 8 and the lower bottom plate 20, so as to reset the floating fixing plate 8.

[0035] The inner cavity of the hole die 4 is provided with a shaping section 5 in the form of a round hole, a forming section 6 in the form of a tapered hole and a guide section 7 in the form of a round hole from top to bottom. The surfaces of the forming section 6 and the shaping section 5 are both provided with the pit type micro-texture 15, as shown. Figure 3 The height of the pit type micro-texture 15 is 15-35 um, the diameter of the pit type micro-texture 15 is 50-120 um, and the occupancy rate of the pit type micro-texture 15 is 15%-25%. The pit type micro-texture 15 is filled with a solid composite lubricant, and the solid composite lubricant is a mixture of molybdenum disulfide, manganese disulfide and graphene. The mass ratio of molybdenum disulfide, manganese disulfide and graphene in the solid composite lubricant is 2:3:0.5.

[0036] As shown in the figure, Figure 2 The processing technology of the joint bearing forming die of the present application comprises the following steps:

[0037] The inner ring 16 is placed on the upper end surface of the lower die 9 through the mandrel 10;

[0038] After the outer ring blank 18 is passed through the mounting hole of the floating positioning plate 8, it is placed on the upper end face of the lower die 9, and the joint bearing is positioned on the upper end face of the lower die 9 through the floating positioning plate 10; the outer ring blank 18 is placed outside the inner ring 16; the self-lubricating gasket 17 is adhered to the inner surface of the outer ring blank 18; the forming section 6 and the shaping section 5 are provided with a concave micro-texture 15, and a certain proportion of solid composite lubricant is filled thereon, so that the deformation of the outer ring blank 18 is gentle during the forming process, and the friction is reduced.

[0039] The upper top plate 1 is moved along the guide column by the hydraulic machine execution mechanism, so that the hole die 4 uniformly extrudes downward; the outer ring blank 18 is extruded by the guide-in section 7, the forming section 6 and the shaping section 5 of the inner ring of the hole die 4 in turn, so that the outer ring blank 18 outside the inner ring 16 is assembled with the inner ring 16;

[0040] When the outer ring blank 18 enters the shaping section 5, the inner ring 16 gradually fits with the upper die 14, and when the inner ring 16 fits with the upper die 14, the polyurethane rubber pad 12 is compressed; after pressure maintaining for 5-10 minutes, the hydraulic machine execution mechanism is depressurized, and the inner ring 16 is separated from the upper die 14 by the elastic return force of the polyurethane rubber pad 12 in the upper die 14.

[0041] It should be understood that although the present specification is described according to various embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined to form other embodiments which can be understood by those skilled in the art.

[0042] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and they are not used to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A mold for forming a knuckle bearing, characterized by, It comprises an upper die (14), a lower die (9), a hole die (4), a lower base (11) and an upper top plate (1), The upper top plate (1) is connected with the lower bottom plate (20) through guide columns, and the upper top plate (1) is moved along the guide columns through the hydraulic machine actuator; the lower base (11) is installed on the lower bottom plate (20), the lower die (9) is installed on the lower base (11), and the core shaft (10) is inserted into the center of the lower die (9), and the core shaft (10) is used for installing the inner ring (16) of the joint bearing; The hole die fixing plate (3) is installed on the upper top plate (1), the upper die (14) is installed on the hole die fixing plate (3), the hole die (4) is installed on the outer side of the upper die (14), and the outer side of the hole die (4) is connected with the hole die fixing plate (3); the outer ring blank (18) of the joint bearing is placed on the surface of the lower die (9), and the outer ring blank (18) of the joint bearing is located outside the inner ring (16); the outer ring blank (18) located outside the inner ring (16) is assembled with the inner ring (16) through the downward movement of the hole die (4); the inner part of the hole die (4) is provided with a pit type micro texture (15); The pit type micro texture (15) is filled with a solid composite lubricant, and the solid composite lubricant is a mixture of molybdenum disulfide, manganese disulfide and graphene; The mass ratio of molybdenum disulfide, manganese disulfide and graphene in the solid composite lubricant is 2:3:0.5; It also comprises a floating fixing plate (8) and a spring (19), the floating fixing plate (8) is provided with an installation hole in the middle, which is in clearance fit with the outer ring blank (18) of the joint bearing, and is used for positioning the outer ring blank (18) of the joint bearing; the spring (19) is installed between the floating fixing plate (8) and the lower bottom plate (20), and is used for resetting the floating fixing plate (8).

2. The mold for forming a knuckle bearing according to claim 1, characterized by The inner cavity of the hole die (4) is provided with a shaping section (5) in the shape of a round hole, a forming section (6) in the shape of a tapered hole and a lead-in section (7) in the shape of a round hole from top to bottom.

3. The mold for forming a knuckle bearing according to claim 2, characterized by The surfaces of the forming section (6) and the shaping section (5) are both provided with pit type micro textures (15).

4. The mold for forming a knuckle bearing according to claim 3, wherein The height of the pit type micro texture (15) is 15-35um, and the diameter of the pit type micro texture (15) is 50-120um.

5. The mold for forming a knuckle bearing according to claim 3, wherein The upper die (14) is installed on the hole die fixing plate (3) through a polyurethane rubber pad (12), so as to facilitate the separation of the upper die (14) and the end surface of the inner ring (16).

6. A machining process of a mold for forming a knuckle bearing according to claim 5, characterized by, It comprises the following steps: The inner ring (16) is placed on the upper end surface of the lower die (9) through the core shaft (10); After the outer ring blank (18) passes through the installation hole of the floating fixing plate (8), it is placed on the upper end surface of the lower die (9); the outer ring blank (18) is placed outside the inner ring (16); a self-lubricating gasket (17) is adhered to the inner surface of the outer ring blank (18); pit type micro textures (15) are processed on the surfaces of the forming section (6) and the shaping section (5) of the hole die (4), and a solid composite lubricant is filled in the pit type micro textures (15). The upper top plate (1) is moved along the guide column by the hydraulic machine actuator, and the hole die (4) extrudes at a constant speed; the outer ring blank (18) is extruded by the introduction section (7), the forming section (6) and the shaping section (5) in the hole die (4) in turn, so that the outer ring blank (18) outside the inner ring (16) is assembled with the inner ring (16); When the inner ring (16) is attached to the upper die (14), the polyurethane rubber pad (12) is compressed; after pressure maintaining for 5-10 minutes, the hydraulic machine actuator is depressurized, and the inner ring (16) is separated from the upper die (14) by the rebound force of the polyurethane rubber pad (12) in the upper die (14).

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