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CN-121988670-A - Bearing bush stamping forming device

CN121988670ACN 121988670 ACN121988670 ACN 121988670ACN-121988670-A

Abstract

The invention belongs to the technical field of bearing bush production and processing, and particularly relates to a bearing bush stamping forming device, which comprises a guide hole penetrating through a die holder along a first direction, and a punch capable of being switched between two stations is arranged in the guide hole, so that the stamping process is divided into two stages, namely, in a station one state, an external angle formed by a first working face and a second working face firstly presses the middle part of the end face of a bearing bush, so that materials are forced to flow outwards preferentially, curling defects caused by edge material concentration are avoided, in a station two state, the first working face is switched to be parallel to the end face and uniformly pressed on an area limited by the guide hole, and the materials which flow directionally in the prior stage are compacted in a regular manner in a closed cavity, so that a compact and defect-free positioning lip is finally formed. The invention fundamentally solves the problems of cracks and air gaps caused by lack of support at the edge and unsmooth material flow in the prior art, and remarkably improves the forming quality and the product yield of the positioning lip.

Inventors

  • GAO HAISHENG
  • GAO XIONG

Assignees

  • 上海祥生贝克轴瓦有限公司

Dates

Publication Date
20260508
Application Date
20260327

Claims (10)

  1. 1. The utility model provides a axle bush stamping forming device which characterized in that includes: The male die (10) comprises a die holder (11) and a semicircular convex surface (12) which is arranged on a first end surface (111) of the die holder (11) and is matched with the intrados (101) of the bearing bush (100); the female die (20) is arranged in an opening and closing manner relative to the male die (10) along a first direction (Z), the female die (20) is provided with a semicircular concave surface (21) matched with an extrados (102) of the bearing bush (100), and a second end surface (22) adjacent to at least one end of the concave surface (21) and parallel to the first end surface (111), and a wedge-shaped cavity (23) for forming a positioning lip (104) of the bearing bush (100) is arranged in an adjacent area of the second end surface (22) and the concave surface (21), wherein the first direction (Z) is the normal direction of the first end surface (111) and the second end surface (22); The die holder (11) is provided with a guide hole (112) penetrating the die holder (11) along the first direction (Z), and an opening of the guide hole (112) on the first end face (111) surrounds at least the wedge-shaped cavity (23) and a part of an end face (103) of the bearing bush (100) adjacent to the wedge-shaped cavity (23) in response to the bearing bush (100) being clamped between the convex face (12) and the concave face (21); The guide hole (112) is internally provided with a punch (30) and a driving seat (40), the driving seat (40) is used for connecting a driving element capable of driving the driving seat (40) to reciprocate along the first direction (Z), and the punch (30) is assembled to synchronously move along the first direction (Z) relative to the driving seat (40); The punch (30) comprises a first working surface (31) and a second working surface (32) adjacent to the first working surface (31), wherein an included angle between the first working surface (31) and the second working surface (32) is smaller than 90 degrees; the punch (30) is movably arranged relative to the drive seat (40) so that the punch (30) can be switched between: A first station in which the first working surface (31) is inclined with respect to the first end surface (111) and the second end surface (22) and the external angle formed between the first working surface (31) and the second working surface (32) is opposite to the end surface of the bearing bush (100) along the first direction (Z), and And a second station, wherein the first working surface (31) is arranged in parallel relative to the first end surface (111) and the second end surface (22), and the projection of the first working surface (31) on the first end surface (111) along the first direction (Z) is overlapped with the opening of the guide hole (112) on the first end surface (111).
  2. 2. Bearing shell press forming device according to claim 1, wherein the second working surface (32) is configured such that, when the punch (30) is located in a first station, in a second station, and when switching between the first station and the second station, the projection of the second working surface (32) onto the first end surface (111) is always located within the projection area of the first working surface (31) onto the first end surface (111) in the first direction (Z).
  3. 3. Bearing shell press forming device according to claim 2, wherein the driving seat (40) has a first stroke and a second stroke when moving in the first direction (Z) towards the direction approaching the wedge-shaped cavity (23), a linkage being provided between the punch (30) and the driving seat (40), the linkage being configured to hold the punch (30) in the first station when the driving seat (40) moves in the first stroke and to hold the punch (30) in the second station when the driving seat (40) moves in the second stroke.
  4. 4. A bushing press forming device according to claim 3, characterized in that the punch (30) is rotatably arranged relative to the drive seat (40), the axis of rotation of the punch (30) being parallel to the axis direction (X) of the bushing (100) in response to the bushing (100) being clamped between the convex surface (12) and the concave surface (21), the linkage being configured such that the linkage enables the punch (30) to rotate from the first to the second station with the external angle as centre of rotation when the drive seat (40) transitions from the first to the second stroke.
  5. 5. The bushing-stamping forming device as claimed in claim 4, characterized in that the linkage comprises a slide (50) arranged slidingly in a second direction (Y) with respect to the drive seat (40), the second direction (Y) being perpendicular to the first direction (Z) and the second direction (Y) being perpendicular to the axis direction (X) of the bushing (100) clamped between the convex surface (12) and the concave surface (21), the punch (30) being hinged to the slide (50) with a hinge shaft (33) between them being parallel to the axis direction (X) of the bushing (100) clamped between the convex surface (12) and the concave surface (21), the hinge shaft (33) being located on the side of the external corner facing away from the axis of the bushing (100) in the second direction (Y), the first side wall (1121) being located on the side of the guide hole (112) adjacent to the axis (100), the slide (112) being located on the first side of the guide hole (50) in the first direction (32) when the slide (112) is located on the first side of the guide hole (50), the linkage further comprises a retaining mechanism disposed between the slide (50) and an inner wall of the guide bore (112) or between the slide (50) and the drive socket (40), the retaining mechanism being configured to retain the slide (50) in the first position when the drive socket (40) is moved in the first stroke and to release the slide (50) from the first position when the drive socket (40) is moved in the second stroke.
  6. 6. The bushing press forming device according to claim 5, characterized in that the guide hole (112) has a second side wall (1122) parallel to the second direction (Y), the holding mechanism comprises a guided portion (1123) and a guided portion (51), the guided portion (51) being restricted to be movable only in the first direction (Z) when the guided portion (51) is coupled with the guide portion (1123), one of the guide portion (1123) and the guided portion (51) being provided to the second side wall (1122) and the other being provided to the slider (50), the guide portion (1123) and the guided portion (51) being configured such that the guided portion (51) is coupled with the guide portion (1123) when the driving seat (40) moves within the first stroke, the guided portion (51) being disengaged from the guide portion (1123) when the driving seat (40) moves within the second stroke.
  7. 7. The bushing press forming device according to claim 5, wherein the guide portion (1123) includes a groove provided in the second side wall (1122) in the first direction (Z), and the guided portion (51) includes a stopper provided in the slider (50) and slidably fitted to the groove.
  8. 8. Bearing shell stamping forming apparatus according to claim 6, characterized in that an elastic element (60) is arranged between the slide (50) and the drive seat (40), the elastic element (60) being configured such that its elastic force on the slide (50) can drive the slide (50) to move in the second direction (Y) towards a direction close to the axis of the bearing shell (100).
  9. 9. The bushing press forming device according to claim 5, characterized in that a limiting mechanism (34) is provided between the punch (30) and the slide (50), the limiting mechanism (34) being configured to limit the rotational travel of the punch (30) between a first angle corresponding to the first station and a second angle corresponding to the second station.
  10. 10. Bearing shell press forming device according to claim 1, characterized in that the angle between the first working surface (31) and the second working surface (32) is 65 ° to 80 °.

Description

Bearing bush stamping forming device Technical Field The invention belongs to the technical field of bearing bush production and processing, and particularly relates to a bearing bush stamping forming device. Background Aiming at the forming process of the positioning lip of the bearing bush in the prior art, a plane punch is generally adopted to press the outer side area of the end face of the bearing bush along the direction perpendicular to the end face of the bearing bush, and the positioning lip is formed by utilizing local plastic deformation. However, the stamping mode has the defects that the outer edge of the bearing bush lacks effective support in the area corresponding to the cavity, the part is easy to become a deformation concentrated area in the stamping process, when the fluidity of the material is insufficient or the stamping speed is too high, the material in the central area is difficult to complement to the edge in time, the edge area is curled first, and further the formed positioning lip is easy to generate defects such as cracks or air gaps and the like, so that the product yield is seriously affected. Disclosure of Invention In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a bearing shell press forming device capable of improving the forming quality of a positioning lip. To achieve the above and other related objects, the present invention provides a bearing shell press forming apparatus comprising: the male die comprises a die holder and a semicircular convex surface which is arranged on the first end surface of the die holder and is matched with the inner cambered surface of the bearing bush; The female die is arranged in an opening-closing manner relative to the male die along a first direction, the female die is provided with a semicircular concave surface matched with the outer cambered surface of the bearing bush, and a second end surface adjacent to at least one end of the concave surface and parallel to the first end surface, and a wedge-shaped cavity for forming a positioning lip of the bearing bush is arranged in an adjacent area of the second end surface and the concave surface; The die holder is provided with a guide hole penetrating the die holder along the first direction, and an opening of the guide hole on the first end face surrounds at least the wedge-shaped cavity and a part of the end face of the bearing bush adjacent to the wedge-shaped cavity in response to the bearing bush being clamped between the convex surface and the concave surface; A punch and a driving seat are arranged in the guide hole, the driving seat is used for being connected with a driving element capable of driving the driving seat to reciprocate along the first direction, and the punch is assembled to synchronously move along the first direction relative to the driving seat; The punch comprises a first working surface and a second working surface adjacent to the first working surface, wherein an included angle between the first working surface and the second working surface is smaller than 90 degrees; the punch is movably arranged relative to the driving seat, so that the punch can be switched between the following stations: a first station, wherein the first working surface is inclined relative to the first end surface and the second end surface, and the external angle formed between the first working surface and the second working surface is opposite to the end surface of the bearing bush along the first direction, and And the second working surface is arranged in parallel relative to the first end surface and the second end surface, and the projection of the first working surface on the first end surface along the first direction is overlapped with the opening of the guide hole on the first end surface. In an alternative embodiment of the present invention, the second working surface is configured such that, when the punch is located at a first station, at a second station, and is switched between the first station and the second station, the projection of the second working surface onto the first end surface in the first direction is always located within the projection area of the first working surface onto the first end surface. In an alternative embodiment of the invention, the driving seat has a first stroke and a second stroke when moving along the first direction towards the direction approaching the wedge-shaped cavity, and a linkage mechanism is arranged between the punch and the driving seat, and is configured to keep the punch at the first station when the driving seat moves in the first stroke, and keep the punch at the second station when the driving seat moves in the second stroke. In an alternative embodiment of the invention, the punch is rotatably arranged relative to the driving seat, the rotation axis of the punch is parallel to the axis direction of the bearing bush in response to the bearing bush being clamped bet