CN-224222630-U - Hollow semi-axis former

CN224222630UCN 224222630 UCN224222630 UCN 224222630UCN-224222630-U

Abstract

The utility model discloses hollow half shaft forming equipment, which belongs to the field of automobile part manufacturing and comprises a grading diameter reducing device, a cold extrusion spline device and a grading diameter reducing device, wherein the grading diameter reducing device is used for reducing a hollow half shaft blank successively, the cold extrusion spline device is used for extruding an internal spline on the hollow half shaft blank, the grading diameter reducing device comprises a first diameter reducing die, a second diameter reducing die and a cold extrusion spline device, the first diameter reducing die is used for extruding the appearance of a hollow half shaft on the hollow half shaft blank, the second diameter reducing die is used for reducing and forming the hollow half shaft blank output by the first diameter reducing die to a target diameter, the first diameter reducing die, the second diameter reducing die and the cold extrusion spline device are matched, and a cold rolled steel pipe is used as the hollow half shaft blank for reducing and forming the hollow half shaft for multiple times, so that material consumption can be reduced, and meanwhile, adverse phenomena such as eccentric center hole, uneven wall thickness and the like can be avoided when special-shaped deep holes are processed on a material rod.

Inventors

LIU FUSEN
WANG KAIJIANG
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. A hollow axle shaft forming apparatus comprising: The grading diameter reducing device is used for sequentially reducing and forming the hollow semi-axle blank; The cold extrusion spline device is used for extruding an internal spline on the hollow half-shaft blank; Wherein, hierarchical reducing device includes: The first diameter reducing die is used for extruding the appearance of the hollow half shaft on the hollow half shaft blank and comprises a first upper die, a first lower die and a mandrel, wherein the first lower die is positioned right below the first upper die, and the first upper die is used for pressing the hollow half shaft blank into the first lower die for first diameter reduction; The second diameter reducing die comprises a second upper die and a second lower die positioned right below the second upper die, wherein the second upper die is used for pressing the hollow half-shaft blank output by the first diameter reducing die into the second lower die so as to reduce the diameter of the hollow half-shaft blank to the target diameter.
2. The hollow axle shaft forming apparatus of claim 1 wherein said first upper die comprises: The first upper cushion block is connected with external pressurizing equipment; The first upper pressure head jacket is detachably connected below the first upper cushion block, and a containing space is arranged in the first upper pressure head jacket; The upper positioning pad is connected to the inside of the first upper pressure head outer sleeve, and the upper positioning pad is matched with the first upper pressure head outer sleeve to form a mandrel clamping groove; The first lower die includes: The first reducing die body is provided with a reducing through hole, and the aperture of the reducing through hole in the first reducing die body is gradually reduced from one side end face to the other side end face of the first reducing die body; The first guide cover is of a cylindrical structure and is connected to the upper part of the first diameter reduction die main body and used for guiding the hollow half-shaft blank and limiting the expansion of the hollow half-shaft blank; The first upper pressing ring is connected above the first guide cover and used for limiting the expansion of the first guide cover; The first reducing die main body and the first guide cover are arranged in the first lower die pull ring; the first lower die pull ring is attached to the first upper pressing ring and is pressed above the first upper pressing ring; The first lower die cavity is connected to the right lower part of the first lower die pull ring, and a containing space is arranged in the first lower die cavity; The first straightening sleeve is arranged in the first lower die cavity and positioned below the first reducing die main body, and corresponds to the position of the reducing through hole on the first reducing die main body and is used for correcting and straightening the hollow half-shaft blank output by the first reducing die main body; the first lower die guide sleeve is sleeved on the outer side of the first guide sleeve and used for limiting deformation of the first guide sleeve; The first lower cushion block assembly is arranged in the first lower die cavity and used for fixing the first straight sleeve and the first lower die guide sleeve in the first lower die cavity; The first lower pressing ring is sleeved on the outer sides of the first lower die cavity and the first lower die pull ring, and the first lower die pull ring is pressed above the first lower die cavity; The mandrel limiting clamp is connected in the mandrel clamping groove in a clamping mode, so that the hollow semi-shaft blank is positioned at the lower end of the first upper pressure head outer sleeve, and a support is formed inside the hollow semi-shaft blank.
3. The hollow axle shaft forming apparatus of claim 2 wherein said mandrel comprises: The shape and the size of the positioning end are matched with those of the mandrel clamping groove; The supporting end is of a multi-section columnar structure, and the diameter of the supporting end is gradually reduced from one end close to the positioning end to the other end; the positioning ring is arranged at the joint of the positioning end and the supporting end and used for marking the axial position of the mandrel in the hollow half-shaft blank.
4. The hollow axle shaft forming apparatus of claim 1 wherein said second upper die comprises: The second upper cushion block is connected with external pressurizing equipment; The second upper pressure head jacket is detachably connected below the second upper cushion block, and a fixed space is arranged at the lower end of the second upper pressure head jacket; The upper end of the upper pressure head is detachably connected in the fixed space of the second upper pressure head jacket, the lower end of the upper pressure head is positioned below the second upper pressure head jacket, and a clamping groove matched with the hollow half-shaft blank is formed in the lower surface of the upper pressure head; the second lower die includes: The diameter of the diameter reducing through hole on the second diameter reducing die main body gradually decreases from one side end face to the other side end face of the second diameter reducing die main body; the second guide cover is provided with a through hole for allowing the hollow half shaft blank to pass through, the second guide cover is connected above the second reducing die main body, and a centralizing assembly is arranged above the second guide cover and used for enabling the hollow half shaft blank in the second guide cover to be vertical; The second upper pressing ring is connected to the upper part of the second guide cover and used for limiting the expansion of the second guide cover; The second reducing die main body and the second guide cover are arranged in the second lower die pull ring, and the second lower die pull ring is attached to the second upper compression ring and is tightly pressed above the second upper compression ring; the second lower die cavity is connected to the right lower part of the second lower die pull ring, and an accommodating space is arranged in the second lower die cavity; The second guide sleeve is arranged in the second lower die cavity and positioned below the second reducing die main body, and corresponds to the position of the reducing through hole on the second reducing die main body and is used for correcting and straightening the hollow half-shaft blank output by the second reducing die main body; The second lower die guide sleeve is sleeved on the outer side of the second guide sleeve and used for limiting deformation of the second guide sleeve; the second lower cushion block assembly is arranged in the second lower die cavity and used for fixing the second straightening sleeve and the second lower die guide sleeve in the second lower die cavity; the second lower pressing ring is sleeved on the outer side of the second lower die cavity and the outer side of the second lower die pull ring, so that the second lower die pull ring is connected with the second lower die cavity to form a whole.
5. The hollow axle shaft forming apparatus of claim 1 wherein said cold extrusion spline assembly comprises a third upper die and a third lower die located directly below said third upper die, wherein said third upper die comprises: the third upper cushion block is connected with external pressurizing equipment; The third upper pressure head jacket is detachably connected below the third upper cushion block, and a fixing space is arranged on the third upper pressure head jacket; the upper pressure head mandrel is vertically connected in the fixed space of the third upper pressure head outer sleeve, and a screw hole is formed in the lower end of the upper pressure head mandrel; The tooth mold is in an annular structure, is arranged at the lower end of the upper pressure head mandrel and moves synchronously with the upper pressure head mandrel; The locking bolt penetrates through the tooth die and is in threaded connection with the screw hole of the upper pressure head mandrel, and the tooth die is limited and locked with the lower end of the upper pressure head mandrel; The third lower die includes: The third lower die cavity is integrally in a cylindrical structure, and an accommodating space is formed in the third lower die cavity; The die is arranged in the third lower die cavity, and is provided with a through hole matched with the hollow half-shaft blank in diameter and used for guiding the hollow half-shaft blank entering the die; The die jacket is sleeved on the outer side of the die and is abutted against the inner wall of the third lower die cavity, and is used for fixing the die and preventing the die from cracking; The ejector rod is arranged at the lower end of the third lower die cavity, is positioned right below the female die and is used for providing support below the hollow half-shaft blank; The third lower cushion block assembly is arranged in the third lower die cavity and is abutted against the lower surfaces of the female die and the female die outer sleeve, and the third lower cushion block assembly is used for filling gaps among the hollow half-shaft blank, the ejector rod and the third lower die cavity and fixing the hollow half-shaft blank and the ejector rod in the third lower die cavity; The third lower pressing ring is sleeved on the outer side of the third lower die cavity and used for limiting the expansion of the third lower die cavity.
6. The hollow half shaft forming device according to claim 5, wherein an adjusting gap is reserved between the third upper pressing head outer sleeve and the third upper cushion block in the horizontal direction, a first aligning screw hole penetrating through the side face of the third upper cushion block is formed, a second aligning screw hole corresponding to the first aligning screw hole in position is formed in the side face of the third upper pressing head outer sleeve, aligning bolts are connected with the first aligning screw hole and the second aligning screw hole in an internal threaded mode, and the aligning bolts are used for adjusting the relative positions of the third upper pressing head outer sleeve and the third upper cushion block.
7. The hollow axle shaft forming apparatus of claim 2 wherein said first reducing die body is of an inside-outside die double-layer construction comprising: The diameter-reducing through hole on the first diameter-reducing die main body is arranged at the center position 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.
8. The hollow axle shaft forming device as in claim 7, wherein the diameter of the large end of the diameter-reducing through hole in the first diameter-reducing die body is matched with the diameter of the hollow axle shaft blank, and the diameter of the small end of the diameter-reducing through hole in the first diameter-reducing die body is 70-85% of the diameter of the large end of the diameter-reducing through hole.

Description

Hollow semi-axis former Technical Field The utility model relates to the field of automobile part manufacturing, in particular to hollow half shaft forming equipment. 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. The hollow half shaft is mainly a reducing pipe with special shape and unequal inner diameter, so that special-shaped deep holes with variable hole diameters are often required to be processed on a material rod obtained after rough turning in order to meet the use requirement, but the traditional mode of processing the deep holes on a solid bar to prepare the hollow half shaft has the technical problems of large blank volume of the bar, large consumption of materials required for molding and low utilization rate of raw materials, and the deep hole processing equipment is relatively expensive and high in cost, the processing difficulty of special-shaped deep holes on the material rod is large, the phenomena of eccentric center holes, uneven wall thickness and the like are easy to occur, meanwhile, the technical problems of poor calibration of inner holes and the like are also caused, and finally the strength of the half shaft is influenced. Disclosure of utility model The utility model aims to solve the technical problems of large material consumption and poor center hole forming quality in the process of processing and forming a hollow half shaft in the prior art, and provides hollow half shaft forming equipment. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A hollow axle shaft forming apparatus comprising: The grading diameter reducing device is used for sequentially reducing and forming the hollow semi-axle blank; The cold extrusion spline device is used for extruding an internal spline on the hollow half-shaft blank; Wherein, hierarchical reducing device includes: The first diameter reducing die is used for extruding the appearance of the hollow half shaft on the hollow half shaft blank and comprises a first upper die, a first lower die and a mandrel, wherein the first lower die is positioned right below the first upper die, and the first upper die is used for pressing the hollow half shaft blank into the first lower die for first diameter reduction; The second diameter reducing die comprises a second upper die and a second lower die positioned right below the second upper die, wherein the second upper die is used for pressing the hollow half-shaft blank output by the first diameter reducing die into the second lower die so as to reduce the diameter of the hollow half-shaft blank to the target diameter. Further, the first upper die includes: The first upper cushion block is connected with external pressurizing equipment; The first upper pressure head jacket is detachably connected below the first upper cushion block, and a containing space is arranged in the first upper pressure head jacket; The upper positioning pad is connected to the inside of the first upper pressure head outer sleeve, and the upper positioning pad is matched with the first upper pressure head outer sleeve to form a mandrel clamping groove; The first lower die includes: The first reducing die body is provided with a reducing through hole, and the aperture of the reducing through hole in the first reducing die body is gradually reduced from one side end face to the other side end face of the first reducing die body; The first guide cover is of a cylindrical structure and is connected to the upper part of the first diameter reduction die main body and used for guiding the hollow half-shaft blank and limiting the expansion of the hollow half-shaft blank; The first upper pressing ring is connected above the first guide cover and used for limiting the expansion of the first guide cover; The first reducing die main body and the first guide cover are arranged in the first lower die pull ring; the first lower die pull ring is attached to the first upper pressing ring and is pressed above the first upper pressing ring; The first lower die cavity is connected to the right lower part of the first lower die pull ring, and a containing space is arranged in the first lower die cavity; The first straightening sleeve is arranged in the first lower die cavity and positioned below the fi