Bimetal composite plate forming die for manufacturing bull-eye bearing

Abstract

The invention relates to a bimetal composite plate forming die for manufacturing a bull-eye bearing. According to the die, the bull-eye bearing is manufactured by adopting a double-layer metal belt formed by a base alloy and a copper layer; the die is characterized in that the die comprises an upper die plate, a lower die plate and a guide pillar and guide sleeve structure arranged between the upper die plate and the lower die plate; a notching station, a straightening and reaming station and a cutting station are sequentially arranged between the upper die plate and the lower die plate in the horizontal direction. The forming of the round hole in the bimetal composite plate is completed by pre-punching of the round hole a and reaming of the round hole b on the die, and is realized by two dies, so that the situation of dislocation of bimetal layers at the round hole caused by different elongation rates due to different metal materials during one-time forming of the round hole in the bimetal composite plate is prevented.

Description

Technical Field

[0001] This invention relates to the field of molds, and more particularly to a bimetallic composite plate forming mold for manufacturing bullseye bearings. Background Technology

[0002] Bullseye bearings, operating under rolling friction, are characterized by smooth, reliable, and noiseless operation. Under liquid lubrication, the rolling surfaces are separated by the lubricating oil, preventing direct contact and significantly reducing friction loss and surface wear. The oil film also provides some vibration damping. Furthermore, they serve a certain load-bearing and lubricating function during operation. Bullseye bearings typically use carbon steel plates as the base material. A layer of spherical copper powder is first sintered onto the steel plate using sintering technology, followed by a layer of approximately 0.03mm PTFE lubricant. Bullseye bearings are generally used in low-speed, heavy-load conditions or in operating parts where maintenance and lubrication are difficult.

[0003] Generally, when progressive stamping sheet metal is used, the sheet metal adopts a single-layer structure. When blanking the sheet metal, the toughness and elongation of the single metal layer are the same, and the metal generally does not produce rough edges or curling after blanking. However, when progressive stamping bimetallic layers are used, due to the different materials and elongation of the metals, the edges of the product are prone to curling or even material separation under the huge impact shear force when blanking. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a bimetallic composite plate forming mold for manufacturing bullseye bearings, which can reduce the occurrence of edge curling and material separation in the progressive stamping process of bimetallic composite plates and improve the quality of bimetallic composite plate products.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: a bimetallic composite plate forming mold for manufacturing bullseye bearings, wherein the mold uses a double-layer metal strip formed by a base alloy and a copper layer to manufacture bullseye bearings; its innovation lies in: the mold includes an upper template, a lower template, and a guide post and guide sleeve structure disposed between the upper template and the lower template; a grooving station, a straightening and reaming station, and a cutting station are arranged sequentially in the horizontal direction between the upper template and the lower template;

[0006] The lower template of the grooving station has a round hole a in the middle, and the upper template of the grooving station has a punch a that matches the round hole a; the surface of the lower template of the grooving station has raised ribs that form oil grooves on the double-layer metal strip.

[0007] A circular hole b is provided in the middle of the lower template of the straightening and reaming station, and a punch b that matches the circular hole b is provided on the upper template of the straightening and reaming station; the diameter of the circular hole b is larger than the diameter of the circular hole a.

[0008] The lower template of the cutting station is a hollow rectangular frame structure. The upper template of the cutting station cooperates with the lower template to cut the bimetallic composite plate and form a joint on the cut bimetallic composite plate. The lower template of the cutting station is provided with a pair of protrusions a and a pair of grooves a on its two inner sides along the width direction. The protrusions a and grooves a correspond to form a joint on the bimetallic composite plate for the bimetallic composite plate to be rolled and connected. The lower part of the lower template of the cutting station is the material drop port.

[0009] The protrusions a on the lower template of the cutting station are inclined downward in the horizontal direction; the upper template of the cutting station is provided with a pair of protrusions b corresponding to a pair of grooves a on the lower template of the cutting station, and the upper template of the cutting station is provided with a pair of grooves b corresponding to a pair of protrusions a on the lower template of the cutting station; the protrusions b are inclined upward in the horizontal direction.

[0010] The lower template of the grooving station has a rectangular structure. There are two ribs on the surface of the lower template. The ribs are symmetrical about the center line of the lower template. The ribs start from the rectangular corner of the lower template of the grooving station, go to the midpoint of the opposite side, and end at the end point on the same side as the starting point. The ribs form a triangular structure on the lower template of the grooving station.

[0011] The material drop opening below the lower template is an inclined plane;

[0012] The pair of protrusions a and the pair of grooves a on the two inner sides of the lower template along the width direction of the cutting station are both modular structures embedded in the rectangular frame of the lower template.

[0013] The pair of protrusions b and the pair of grooves b on the two inner sides of the upper template along the width direction of the cutting station are modular structures embedded in the upper template.

[0014] The advantages of this invention are:

[0015] 1) The forming of round holes on the bimetallic composite plate is accomplished by pre-punching round hole a and expanding round hole b on the mold. This is done by two molds to prevent misalignment of the bimetallic layer at the round hole due to the different elongation rates caused by the different metal materials during one-time forming of the round hole on the bimetallic composite plate.

[0016] 2) A pair of protrusions a and a pair of protrusions b are provided on the lower and upper templates of the cutting station to form a rolled joint of the metal composite plate. The protrusions a and b are respectively inclined in the horizontal direction to prevent the edges of the double metal from curling and the double metal from misaligning when the material is dropped.

[0017] 3) The material drop hole below the lower template is an inclined plane, which makes it easy for the double-layer metal plate to slide out through the material drop hole.

[0018] 4) The pair of protrusions a and the pair of grooves a on the two inner sides of the lower template along the width direction of the cutting station, and the pair of protrusions b and the pair of grooves b on the two inner sides of the upper template along the width direction of the cutting station, are all modular structures embedded in the rectangular frame of the lower template, which facilitates the disassembly and installation of the protrusions and grooves. The use of high-strength modules increases the service life of the station mold. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of a bimetallic composite plate forming mold for manufacturing bullseye bearings according to the present invention.

[0021] Figure 2 This is a schematic diagram of the cutting station of the bimetallic composite plate forming mold for the bullseye bearing of the present invention.

[0022] Figure 3 This is a schematic diagram of the bimetallic composite plate formed after the bullseye bearing of the present invention is manufactured. Detailed Implementation

[0023] The following embodiments are intended to enable those skilled in the art to more fully understand the present invention, but do not limit the invention to the scope of the embodiments described.

[0024] like Figures 1 to 3 The diagram shows a bimetallic composite plate forming mold for manufacturing bullseye bearings. The mold uses a double-layer metal strip formed by a base alloy and a copper layer to manufacture bullseye bearings. The mold includes an upper mold plate, a lower mold plate, and a guide post and guide sleeve structure set between the upper mold plate and the lower mold plate. A grooving station 1, a straightening and reaming station 2, and a cutting station 3 are arranged sequentially in the horizontal direction between the upper mold plate and the lower mold plate.

[0025] A round hole 11a is provided in the middle of the lower template of the grooving station 1, and a punch a matching the round hole 11a is provided on the upper template of the grooving station 1; a raised rib 12 forming an oil groove on the double-layer metal strip is provided on the surface of the lower template of the grooving station 1.

[0026] A circular hole 21b is provided in the middle of the lower template of the straightening and reaming station 2, and a punch b that matches the circular hole 21b is provided on the upper template of the straightening and reaming station 2; the diameter of the circular hole 21b is larger than the diameter of the circular hole 11a.

[0027] The lower template of the cutting station 3 is a hollow rectangular frame structure. The upper template of the cutting station 3 cooperates with the lower template to cut the bimetallic composite plate and forms a joint 33 on the cut bimetallic composite plate. The lower template of the cutting station 3 is provided with a pair of protrusions 31a and a pair of grooves 32a on its two inner sides along the width direction. The protrusions 31a and grooves 32a form a joint 33 on the bimetallic composite plate for the bimetallic composite plate to be rolled and connected. The lower part of the lower template of the cutting station 3 is the material drop port 34.

[0028] The protrusions 31a on the lower template of the cutting station 3 are inclined downward in the horizontal direction; the upper template of the cutting station 3 is provided with a pair of protrusions 35b corresponding to a pair of grooves 32a on the lower template of the cutting station 3, and the upper template of the cutting station 3 is provided with a pair of grooves 36b corresponding to a pair of protrusions 31a on the lower template of the cutting station 3; the protrusions 35b are inclined upward in the horizontal direction.

[0029] The lower template of the grooving station 1 has a rectangular structure. There are two ribs 12 on the surface of the lower template. The ribs 12 are symmetrical about the center line of the lower template. The ribs 12 start from the rectangular corner of the lower template of the grooving station 1, go to the midpoint of the opposite side, and end at the end point on the same side as the starting point. The ribs 12 form a triangular structure on the lower template of the grooving station 1.

[0030] The material drop opening 34 below the lower template is an inclined plane.

[0031] The pair of protrusions 31a and the pair of grooves 32a on the two inner sides of the lower template along the width direction of the cutting station 3 are modular structures embedded in the rectangular frame of the lower template.

[0032] The pair of protrusions b35 and the pair of grooves 36b on the two inner sides of the upper template along the width direction of the cutting station 3 are modular structures embedded in the upper template.

[0033] The working principle of the bimetallic composite plate forming mold for bullseye bearing manufacturing is as follows: When the bimetallic composite plate passes through the grooving station, the upper and lower templates of the grooving station form an oil groove on the bimetallic plate, and the punch a on the upper template forms a round hole a on the bimetallic composite plate. After the stamping and forming at the grooving station is completed, the bimetallic composite plate reaches the straightening and hole-expanding station to straighten the bimetallic composite plate. Then, the round hole a is enlarged to form a round hole b. After the straightening and hole-expanding station is completed, the bimetallic composite plate reaches the cutting station. The bimetallic composite plate slides out through the blanking port by being blanked at the cutting station.

[0034] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A bimetallic composite plate forming mold for manufacturing bullseye bearings, wherein the mold uses a double-layer metal strip formed by a base alloy and a copper layer to manufacture the bullseye bearing; characterized in that: The mold includes an upper mold plate, a lower mold plate, and a guide post and guide sleeve structure set between the upper mold plate and the lower mold plate; a grooving station, a straightening and reaming station, and a cutting station are arranged sequentially in the horizontal direction between the upper mold plate and the lower mold plate; The lower template of the grooving station has a round hole a in the middle, and the upper template of the grooving station has a punch a that matches the round hole a; the surface of the lower template of the grooving station has raised ribs that form oil grooves on the double-layer metal strip. A circular hole b is provided in the middle of the lower template of the straightening and reaming station, and a punch b that matches the circular hole b is provided on the upper template of the straightening and reaming station; the diameter of the circular hole b is larger than the diameter of the circular hole a. The lower template of the cutting station is a hollow rectangular frame structure. The upper template of the cutting station cooperates with the lower template to cut the bimetallic composite plate and form a joint on the cut bimetallic composite plate. The lower template of the cutting station is provided with a pair of protrusions a and a pair of grooves a on its two inner sides along the width direction. The protrusions a and grooves a correspond to form a joint on the bimetallic composite plate for the bimetallic composite plate to be rolled and connected. The lower part of the lower template of the cutting station is the material drop port. The protrusions a on the lower template of the cutting station are inclined downward in the horizontal direction; the upper template of the cutting station is provided with a pair of protrusions b corresponding to a pair of grooves a on the lower template of the cutting station, and the upper template of the cutting station is provided with a pair of grooves b corresponding to a pair of protrusions a on the lower template of the cutting station; the protrusions b are inclined upward in the horizontal direction. The lower template of the grooving station has a rectangular structure. There are two ribs on the surface of the lower template. The ribs are symmetrical about the center line of the lower template. The ribs start from the rectangular corner of the lower template of the grooving station, go to the midpoint of the opposite side, and end at the end point on the same side as the starting point. The ribs form a triangular structure on the lower template of the grooving station. The material drop opening below the lower template is an inclined plane; The pair of protrusions a and the pair of grooves a on the two inner sides of the lower template along the width direction of the cutting station are both modular structures embedded in the rectangular frame of the lower template. The pair of protrusions b and the pair of grooves b on the two inner sides of the upper template along the width direction of the cutting station are modular structures embedded in the upper template.

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