CN-224222546-U - Hollow semi-axis reducing die

CN224222546UCN 224222546 UCN224222546 UCN 224222546UCN-224222546-U

Abstract

The utility model discloses a hollow half-shaft reducing die, which belongs to the field of manufacturing of automobile parts and comprises an upper die, a lower die and a centering component, wherein the upper die is connected with external pressurizing equipment, an upper pressing head used for limiting and abutting against a workpiece to be machined is arranged on the upper die, the lower die is positioned right below the upper die, the lower die comprises a reducing die main body, the upper die and the lower die are matched to press the workpiece to be machined into the reducing die main body for reducing, the centering component is positioned right above the reducing die main body, and the centering component is used for enabling the workpiece to enter the reducing die main body at a fixed angle.

Inventors

WANG KAIJIANG
LIU FUSEN
ZHOU MINGLIANG
ZHU YUANJI

Assignees

四川科雷特科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250417

Claims (8)

1. The utility model provides a hollow semi-axis reducing mould which characterized in that includes: The upper die is connected with external pressurizing equipment, and an upper pressing head for limiting and abutting against a workpiece to be processed is arranged on the upper die; The lower die is positioned right below the upper die and comprises a reducing die main body, and the upper die is matched with the lower die to press a workpiece to be machined into the reducing die main body for reducing; The lower die further comprises a centralizing assembly, the centralizing assembly is located right above the reducing die main body, and the centralizing assembly is used for enabling a workpiece to be machined to enter the reducing die main body at a fixed angle.
2. The hollow axle shaft reducing die set forth in claim 1, wherein said upper die further comprises: The upper cushion block is of a concave structure, and the concave surface of the upper cushion block faces downwards; The upper pressure head jacket is detachably connected to the lower portion of the upper cushion block, and a space for fixing the upper pressure head is arranged in the upper pressure head jacket.
3. The hollow axle shaft reducing die set forth in claim 2 wherein said upper ram comprises: the connector is connected to the inside of the upper pressure head jacket; The abutting end face is located below the upper pressure head outer sleeve, and a clamping groove matched with the shape of the workpiece to be machined is formed in the abutting end face.
4. The hollow axle shaft reducing die as set forth in claim 1, wherein said reducing die body is provided with a reducing through hole, the diameter of said reducing through hole is gradually reduced from one side end face to the other side end face of said reducing die body, said lower die further comprises: the upper pressing ring is connected above the righting assembly and is positioned outside the righting assembly; The lower die pull ring is of a tubular structure, the inner diameter of the lower die pull ring is matched with the outer diameter of the upper press ring, the diameter-reducing die main body, the righting component and the upper press ring are connected inside the lower die pull ring, and the lower die pull ring is attached to the upper press ring and is tightly pressed above the upper press ring; the lower die cavity is connected to the right lower part of the lower die pull ring, and an accommodating space is arranged in the lower die cavity; The guide assembly is arranged in the lower die cavity and is positioned below the reducing die main body; the lower cushion block assembly is arranged in the lower die cavity and used for fixing the straightening assembly in the lower die cavity; And the lower pressing ring is sleeved with the lower die cavity and the outer side of the lower die pull ring, and the lower die pull ring is tightly pressed above the lower die cavity.
5. The hollow axle shaft reducing die of claim 4 wherein said centering assembly comprises: The guide cover is of a cylindrical structure, is provided with a through hole, is connected to the upper part of the reducing die main body, and is used for limiting outward expansion of a workpiece to be processed, so that the reducing through hole and the axis of the through hole on the guide cover are positioned on the same straight line; the pressing plate is in a cover shape, is detachably connected to the upper surface of the guide cover, and forms a track with a gap between the pressing plate and the guide cover; The three-flap sliding block is arranged along the periphery of the through hole on the guide cover; the spring clamp is abutted to the outer sides of the three sliding blocks, so that the three sliding blocks are close to each other.
6. The hollow axle shaft reducing die set forth in claim 4, wherein said reducing die body is of a double-layer structure comprising: the diameter-reducing through hole is formed in the center of the end face of the inner die; The outer die is sleeved on the outer side of the inner die, the outer die and the inner die are matched in a heat sealing mode, and the outer die is used for providing inward prestress for the inner die.
7. The hollow axle shaft reducing die of claim 4, wherein said straightening assembly comprises: The guide sleeve is of a tubular structure, is arranged in the lower die cavity and is positioned below the reducing die main body, and corresponds to the reducing through hole in position, so that the axis of the guide sleeve and the axis of the reducing through hole are in the same straight line; The lower die guide sleeve is sleeved on the outer side of the guide sleeve and used for limiting deformation of the guide sleeve.
8. The hollow axle shaft reducing die of claim 7 wherein said lower spacer assembly comprises: the first lower cushion block is positioned at the bottom of the lower die cavity; The second lower cushion block is arranged above the first lower cushion block, is positioned below the lower die guide sleeve and the guide sleeve, and is limited and fixed between the second lower cushion block and the reducing die main body; the third lower cushion block is arranged between the reducing die main body and the lower die guide sleeve and is matched with the second lower cushion block to compress and fix the lower die guide sleeve.

Description

Hollow semi-axis reducing die Technical Field The utility model relates to the field of automobile part manufacturing, in particular to a hollow half shaft diameter reducing die. Background The axle shaft of the automobile is also called a driving shaft, the differential mechanism is connected with a driving wheel, the axle shaft is used as a part for transmitting torque of the automobile, the torsional strength of the axle shaft is forced, the axle shaft in the industry is generally manufactured by adopting a solid axle forging mode, the weight is generally high, however, the national advocacy of energy conservation and emission reduction and the reduction of the weight of the automobile body are development trends at present, and the solid axle shaft obviously cannot meet the development of the industry, so that the hollow technology of the axle shaft naturally becomes a leading edge technology discussed in the industry. In order to improve the utilization rate of raw materials and reduce the risks of adverse phenomena such as eccentric center hole, uneven wall thickness and the like in deep hole processing of a half shaft, the related technology adopts a cold-rolled steel pipe to shrink and form a hollow half shaft, but the cold-rolled steel pipe cannot be reduced in place for one time and needs to shrink and form the hollow half shaft for multiple times due to the limitation of the deformation amount of materials, the cold-rolled steel pipe subjected to primary diameter reduction is a reducing pipe with special shape and unequal inner diameter, and in the subsequent diameter reduction step, when the cold-rolled steel pipe with different diameter moves in a die, a gap exists between the cold-rolled steel pipe and the die, so that the cold-rolled steel pipe is easy to be in a skew state in the die, the end part of the cold-rolled steel pipe is broken after diameter reduction, the pipe wall becomes thin, and the forming quality is influenced. Disclosure of utility model The utility model aims to solve the technical problem that the diameter reduction forming quality is poor due to the fact that the axial angle of a cold-rolled steel pipe with different diameters is in a skew state when the cold-rolled steel pipe with different diameters moves in a diameter reduction die. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A hollow axle shaft reducing die comprising: The upper die is connected with external pressurizing equipment, and an upper pressing head for limiting and abutting against a workpiece to be processed is arranged on the upper die; The lower die is positioned right below the upper die and comprises a reducing die main body, and the upper die is matched with the lower die to press a workpiece to be machined into the reducing die main body for reducing; The lower die further comprises a centralizing assembly, the centralizing assembly is located right above the reducing die main body, and the centralizing assembly is used for enabling a workpiece to be machined to enter the reducing die main body at a fixed angle. Further, the upper die further comprises: The upper cushion block is of a concave structure, and the concave surface of the upper cushion block faces downwards; The upper pressure head jacket is detachably connected to the lower portion of the upper cushion block, and a space for fixing the upper pressure head is arranged in the upper pressure head jacket. Further, the upper ram includes: the connector is connected to the inside of the upper pressure head jacket; The abutting end face is located below the upper pressure head outer sleeve, and a clamping groove matched with the shape of the workpiece to be machined is formed in the abutting end face. Further, the reducing die main body is provided with a reducing through hole, the aperture of the reducing through hole gradually decreases from one side end face to the other side end face of the reducing die main body, and the lower die further comprises: the upper pressing ring is connected above the righting assembly and is positioned outside the righting assembly; The lower die pull ring is of a tubular structure, the inner diameter of the lower die pull ring is matched with the outer diameter of the upper press ring, the diameter-reducing die main body, the righting component and the upper press ring are connected inside the lower die pull ring, and the lower die pull ring is attached to the upper press ring and is tightly pressed above the upper press ring; the lower die cavity is connected to the right lower part of the lower die pull ring, and an accommodating space is arranged in the lower die cavity; The guide assembly is arranged in the lower die cavity and is positioned below the reducing die main body; the lower cushion block assembly is arranged in the lower die cavity and used for fixing the straightening assembly in the lower die cavity; And the lower pressing ring is sl