CN111015136A - Method and die for machining male shaft of intermediate shaft of automobile steering system - Google Patents
Method and die for machining male shaft of intermediate shaft of automobile steering system Download PDFInfo
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- CN111015136A CN111015136A CN201911345824.1A CN201911345824A CN111015136A CN 111015136 A CN111015136 A CN 111015136A CN 201911345824 A CN201911345824 A CN 201911345824A CN 111015136 A CN111015136 A CN 111015136A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention relates to a method for processing a male shaft of an intermediate shaft of an automobile steering system and a die thereof, wherein the method comprises the steps of upsetting and extruding one end of a bar by utilizing an upsetting and extruding forming die to form a T-shaped blank, bending a T-shaped head to form a U-shaped fork of the male shaft, performing surface lubrication treatment, performing cold extrusion to form a spline part of the male shaft, and finally performing supplementary machining and final heat treatment to obtain the required male shaft; the die is used for upsetting-extruding the end part of the bar stock to obtain the T-shaped head. The invention has the advantages of high material utilization rate, high processing efficiency, good consistency, high forming precision and high strength of the connecting part of the U-shaped fork and the external spline part.
Description
Technical Field
The invention belongs to the field of automobile part processing, and particularly relates to a method and a die for processing a male shaft of an intermediate shaft of an automobile steering system.
Background
The intermediate shaft is one of the core components of a motor vehicle drive train for transmitting steering movements and steering forces. The connection mode of the male shaft and the female shaft of the existing intermediate shaft mainly has two main types: pin-lock and key-slide.
The key sliding type is that an external spline is processed on a male shaft, an internal spline is processed on a female shaft, then a rolling body and a retainer are installed on the external spline, and then the male shaft is pressed into the female shaft. The connection mode of the male shaft and the female shaft of the intermediate shaft has the advantages that the male shaft and the female shaft can relatively slide for a certain distance, so that the effects of shock absorption and noise reduction are achieved.
At present, for the processing of the male shaft, a U-shaped groove is generally processed to obtain a U-shaped fork at one end of the male shaft, then an extrusion process or a machining process is adopted to form an external spline of a shaft body part of the male shaft, and then the two are welded together for use. The method has the following disadvantages: 1. the U-shaped fork and the shaft part external spline are respectively formed, and the process is long; 2. when the tool is used for clamping the male shaft to process the external spline, the part has larger length-diameter ratio and large spline length, so that the processing precision is difficult to control, even the processed spline key groove is inclined, the matching use with the female shaft is influenced, the spline part and the U-shaped fork are connected for use subsequently, the coaxiality of the spline part and the U-shaped fork is difficult to ensure, and the vibration is easily caused in the transmission process; 3. and a subsequent welding process is adopted, so that welding defects easily exist, and potential safety hazards are caused.
Disclosure of Invention
The invention aims to provide a method for processing a male shaft of an intermediate shaft of an automobile steering system and a die thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for processing a male shaft of an intermediate shaft of an automobile steering system comprises the following steps:
firstly, cutting a spheroidizing annealed bar stock according to the designed length of a male shaft, putting the cut spheroidizing annealed bar stock into an upsetting-extruding forming die, and extruding one end of the bar stock in a cold state to enable the material to radially flow to form a T-shaped head so as to obtain a T-shaped blank, wherein the other end of the bar stock is a shaft part of the T-shaped blank;
step two, leaving a boss after extrusion at the center of the end face of the T-shaped head of the T-shaped blank, and cutting the boss by adopting a disc milling cutter or a lathe;
step three, smearing a lubricant on the T-shaped head of the T-shaped blank, then bending two wings of the T-shaped head oppositely by adopting an extrusion bending die, and forming an arc to obtain a U-shaped fork at the end part of the male shaft and an inner groove of the U-shaped fork;
fourthly, after burrs on the obtained U-shaped fork are removed, the allowance of the end part of the U-shaped fork is cut off by a punch;
step five, performing surface lubrication treatment on the blank obtained by the step four, and then performing cold extrusion to form the external spline of the shaft part to obtain a required male shaft blank, wherein the spline and the U-shaped fork part of the blank are not subjected to supplementary machining;
and step six, after the obtained male shaft blank is subjected to supplementary machining to the size of a finished product, carrying out heat treatment to the strength and hardness required by the technology, and obtaining a male shaft finished product.
An upsetting-extruding forming die is used for the male shaft processing method and comprises an upper die and a lower die, wherein a male die and an elastic pressing mechanism are mounted in the upper die, the elastic pressing mechanism is used for pressing the lower die, so that all parts of the lower die are tightly matched in the vertical direction, the diameter of the male die is matched with the head end of a bar to be formed, and the male die can extend into a die hole of the lower die and press the end face of the head end of the bar; and when the male die presses and upsets the upper end of the bar stock in the die hole, the material at the upper end of the bar stock flows downwards and flows into the die cavity along the radial direction to form the T-shaped head.
The upper die comprises a die sealing upper seat and a die sealing seat stand, the die sealing seat stand is fixed on the lower surface of the die sealing upper seat, the elastic pressing mechanism is fixed in a mounting groove corresponding to the die sealing upper seat and the die sealing seat stand, and the lower end of the elastic pressing mechanism extends out of the mounting groove; and the center of the die sealing seat platform is provided with a mounting hole for mounting the male die, the upper end surface of the male die abuts against a male die cushion block in the mounting hole, and the male die is fixed in the mounting hole by a locking mechanism.
The upper end part of the male die is in a conical shape, the locking mechanism is a locking ring with an external thread, an internal thread is processed on the wall of the mounting hole, the locking ring is sleeved on the upper end part of the male die, and the male die is fixed on the die sealing base platform through the matching of the internal thread and the external thread.
The elastic pressing mechanism is a nitrogen spring.
The lower mould includes cavity of resorption inner core, radial extrusion inner core and the upset mould inner core that sets up from bottom to top, and the cavity of resorption inner core is equipped with concentric lower chamber overcoat outward, radially extrudes the outer concentric material chamber overcoat that is equipped with of inner core, and the upset mould inner core is equipped with concentric pullover stress circle outward, the centre bore of cavity of resorption inner core, radial extrusion inner core and upset mould inner core corresponds from top to bottom and forms the nib, the middle part of holding material chamber outer jacket upper surface sets up two shaping grooves along radial direction, and two shaping grooves are located respectively the both sides in nib, and be "a" word and arrange, radial extrusion inner core top surface open have with the aqueduct of crossing of shaping groove butt joint, cross aqueduct and shaping groove butt joint formation and be used for the shaping the die cavity of T shape head.
The sleeve head stress ring and the material containing cavity outer sleeve, and the material containing cavity outer sleeve and the lower cavity outer sleeve are installed in a matched mode through a convex-concave structure; the lower cavity outer sleeve is fixed in the die carrier, and a guide pillar and a guide sleeve are further arranged between the material containing cavity outer sleeve and the sleeve head stress ring.
Still be equipped with stop gear and guiding mechanism between last mould and the lower mould, stop gear and guiding mechanism all set up along mould circumference, stop gear is used for the limiting to go up the extreme position of mould return stroke, guiding mechanism provides the direction for last mould pushes down.
The limiting mechanism is a distance pull rod screw, after the distance pull rod screw penetrates through the die sealing seat platform, the thread end part of the distance pull rod screw is in threaded connection with the sleeve head stress ring, the screw head extends into the limiting hole of the die sealing upper seat, and when the upper die returns, the screw head is blocked at the bottom of the limiting hole to play a role in limiting the return stroke limit position of the upper die.
The guide mechanism comprises a guide rod and a guide sleeve, the guide sleeve is installed on the die sealing seat platform, the guide rod is arranged in the guide sleeve, the bottom end of the guide rod is fixed on the sleeve head stress ring, and the top end of the guide rod is movably arranged in a guide hole of the die sealing upper seat.
The invention has the following innovation points and advantages: when the male shaft is processed by using a bar stock, the ratio of the length to the diameter of the upset part at the upper end of the bar stock is more than 2.5 times and more than the upset ratio, so that the conventional upset mode is easy to cause instability. The invention adopts the upsetting-extruding forming mode to upset and extrude one end of the annealed bar stock to form the T-shaped head, then utilizes the bending die to bend the T-shaped head into the U-shaped fork and simultaneously form the U-shaped fork inner groove (namely the U-shaped groove of the U-shaped fork), and the process does not need to machine and cut redundant materials, and then carries out surface lubrication treatment, cold extrusion of the spline part and finally heat treatment to obtain the required male shaft. The whole in-process does not need too much machining, can improve the utilization ratio of material, promotes machining efficiency, has improved the shaping precision simultaneously, can ensure the axiality of U type fork and spline part and the intensity at connection position, avoids welding defect, can ensure the required precision of whole public axle, satisfies with female axle complex operation requirement.
Drawings
FIG. 1 is a process scheme of the present invention;
FIG. 2 is a schematic structural view of an upsetting-extruding forming die according to the present invention;
FIG. 3 is a top view of the T-head;
the labels in the figure are: 1. the die set base comprises a die set base seat 2, a die set base plate 3, a mandril 4, a lower cavity outer sleeve 5, a lower cavity inner core 6, a die set barrel 7, a material containing cavity outer sleeve 8, an extrusion inner core 9, a guide pillar 10, an upsetting and extrusion die inner core 11, a sleeve head stress ring 12, a guide sleeve 13, a distance pull rod screw 14, a guide rod 15, a male die 16, a locking ring 17, a male die cushion block 18, a die sealing base table 19, a nitrogen spring 20, a die sealing upper base 21, a lower base plate 22 and a die cavity.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the invention is not limited thereto.
Referring to the attached figure 1, the method for processing the male shaft of the intermediate shaft of the automobile steering system comprises the following steps:
step one, as shown in figure 1 (a), sawing a spheroidized annealed bar according to the designed length of a male shaft; after lubrication treatment, putting a bar into an upsetting extrusion forming die shown in fig. 2, pressing down the bar by a hydraulic press, firstly, pressing a nitrogen spring 19 on a sleeve stress ring 11 of a lower die, and when the hydraulic press continues to press down, pressing down the upper end of the bar by a male die 15 in an upper die, so that a material flows radially towards a die cavity communicated with a die hole of the lower die to form a T-shaped head, thus obtaining a T-shaped blank shown in fig. 1 (b), wherein the other end of the bar is a shaft part of the T-shaped blank;
step two, leaving a boss after extrusion at the center of the end face of the T-shaped head of the T-shaped blank, as shown in fig. 1 (c), and then cutting off the boss by adopting a disc milling cutter;
step three, smearing a lubricant on the T-shaped head of the T-shaped blank, then bending two wings of the T-shaped head oppositely by adopting an extrusion bending die to form an arc to obtain a U-shaped fork at the end part of the male shaft, and forming an inner groove of the U-shaped fork, namely a U-shaped groove of the U-shaped fork, as shown in figure 1 (d);
step four, after removing burrs on the obtained U-shaped fork, punching and cutting the allowance of the end part of the U-shaped fork by using a punch press, as shown in figure 1 (e);
step five, performing surface lubrication treatment on the blank obtained by the step four, and then performing cold extrusion on the shaft part of the blank to obtain a male shaft blank, wherein the obtained male shaft blank is shown in figure 1 (f), and subsequent supplementary machining is not required for a U-shaped fork and an external spline in the male shaft blank;
and step six, the obtained male shaft blank is subjected to supplementary machining until the length size of the finished product is reached, and the male shaft blank is subjected to heat treatment until the strength and hardness requirements are met, so that the finished male shaft product is obtained.
In the above method, the specific structure of the upsetting extrusion forming die is shown in fig. 2, the die comprises an upper die and a lower die, and the left side and the right side in fig. 2 are respectively die cross-sectional views in different states, wherein the left side represents the position state between the upper die and the lower die before extrusion, and the right side represents the position state between the upper die and the lower die after extrusion is completed.
The upper die mainly comprises a die sealing upper seat 20, a die sealing seat table 18, a nitrogen spring 19, a male die cushion block 17, a locking ring 16 and a male die 15. The size of the upper die sealing seat 20 corresponds to that of a slide block groove of the hydraulic machine so as to be conveniently installed on the hydraulic machine, the die sealing seat stand 18 is positioned below the upper die sealing seat 20 and fixedly connected by bolts, installation grooves for installing the nitrogen spring 19 are formed in the upper die sealing seat 20 and the die sealing seat stand 18, the upper end of the nitrogen spring 19 is fixed on the upper die sealing seat 20 through screws, and the lower end of the nitrogen spring extends out of the installation groove of the die sealing seat stand 18; the die sealing seat platform 18 is further provided with a mounting hole for mounting the male die 15 and a male die cushion block 17, the mounting hole is located in the center of the die sealing seat platform 18 and is a stepped hole, the male die cushion block 17 is located at the bottom of the mounting hole, the upper end of the male die 15 is abutted against the male die cushion block 17 and is fixed by the locking ring 16. The center of the locking ring 16 is provided with a taper hole matched with the end conical surface of the male die 15, an external thread is processed on the outer cylindrical surface of the locking ring 16 and is matched with the thread of the mounting hole to fix the male die 15, the male die 15 can be better pressed by the matching of the taper hole and the end conical surface of the male die 15, and the male die 15 is prevented from loosening and skewing in the extrusion process. The end face of the locking ring 16 is provided with a receptacle for facilitating rotation of the locking ring 16, into which receptacle the locking ring 16 can be rotated by means of a tool to tighten the stationary punch 15.
The nitrogen spring 19 is used as an elastic pressing mechanism for pressing each component of the lower die so that the upper die and the lower die are always in a die-closing state during the extrusion process in the vertical direction. Therefore, any elastic pressing mechanism may be used as long as it can perform this function.
The lower die comprises a lower cavity inner core 5, a radial extrusion inner core 8 and an upsetting and extruding die inner core 10 which are sequentially arranged from top to bottom, a concentric lower cavity outer sleeve 4 is arranged outside the lower cavity inner core 5, the lower cavity outer sleeve 4 provides prestress for the lower cavity inner core, a concentric material containing cavity outer sleeve 7 is arranged outside the radial extrusion inner core 8, the material containing cavity outer sleeve 7 provides prestress for the radial extrusion inner core 8, a concentric sleeve head stress ring 11 is arranged outside the upsetting and extruding die inner core 10, central holes of the lower cavity inner core 5, the radial extrusion inner core 8 and the upsetting and extruding die inner core 10 correspond to each other up and down to form a die hole for bar forming, two forming grooves are arranged in the radial direction in the middle of the upper surface of the material containing cavity outer sleeve 7, the two forming grooves are respectively positioned on two sides of the die hole and are arranged in a shape of a Chinese character 'yi', transition grooves which are butted with the forming grooves are arranged on the top surface of the radial extrusion inner core 8, the transition groove and the forming groove are butted to form a die cavity 22 for forming the T-shaped head. And the parts of the bottom of the upsetting-extruding die inner core 10 corresponding to the transition grooves are also provided with radial extruding working belts so as to reduce the friction force of radial extrusion.
Further, the outer circumferential surfaces of the lower cavity inner core 5, the radial extrusion inner core 8 and the upsetting-extruding die inner core 10 are conical surfaces, and the upper ends of the conical surfaces are small, and the lower ends of the conical surfaces are large.
The sleeve head stress ring 11 and the material containing cavity outer sleeve 7 as well as the material containing cavity outer sleeve 7 and the lower cavity outer sleeve 4 are installed in a matched mode through seam allowance structures; the lower cavity outer sleeve 4 is fixed in the die set, the die set comprises a die set barrel 6, a die set cushion seat 1 and a die set cushion plate 2, the die set barrel 6 is connected with the die set cushion seat 1 in a matched mode through a seam allowance, the die set cushion plate 2 is located in a groove in the center of the die set cushion seat 1, and the die set cushion plate 2 is flush with the upper surface of the die set cushion seat 1 so as to bear the lower cavity inner core 5 and the lower cavity outer sleeve 4; the die carrier cylinder 6 is fixed on the lower bottom plate 21 through screws.
Furthermore, a guide post 9 and a guide sleeve are arranged between the material accommodating cavity outer sleeve 7 and the sleeve head stress ring 11. The guide sleeve is arranged in a guide hole corresponding to the material accommodating cavity outer sleeve 7 and the sleeve head stress ring 11, the guide pillar 9 is movably arranged in the guide sleeve, a limiting head with the diameter larger than the inner diameter of the guide sleeve is arranged at the bottom end of the guide pillar 9, and the upper surface of the lower die frame barrel 6 can support the limiting head to prevent the guide pillar 9 from being separated from the guide sleeve.
Still be equipped with stop gear and guiding mechanism between last mould and the lower mould, stop gear and guiding mechanism all set up along mould circumference, stop gear is used for the limiting to go up the extreme position of mould return stroke, guiding mechanism provides the direction for last mould pushes down.
The limiting mechanism is a distance pull rod screw 13, after the distance pull rod screw 13 penetrates through the die sealing seat table 18, the thread end part of the distance pull rod screw 13 is in threaded connection with the sleeve head stress ring 11, the screw head extends into a limiting hole of the die sealing upper seat 20, and when the upper die returns, the screw head is blocked at the bottom of the limiting hole to play a role in limiting the return limit position of the upper die.
The guide mechanism comprises a guide rod 14 and a guide sleeve 12, the guide sleeve 12 is installed on a die sealing seat table 18, the guide rod 14 is arranged in the guide sleeve 12, the bottom end of the guide rod 14 is fixed on the sleeve head stress ring 11, and the top end of the guide rod 14 is movably arranged in a guide hole of a die sealing upper seat 20.
The upsetting-extruding forming die can extrude the upper end of a bar material placed in the die hole, and during extrusion, the metal material flows downwards and only flows to the die cavities 22 on two sides of the die hole, so that a T-shaped head is formed. In the process, the nitrogen spring 19 is flexibly pressed down under the pressure of the hydraulic press, so that the lower surface of the sleeve stress ring 11 is tightly attached to the upper surface of the material containing cavity outer sleeve 7, and the composition of the die cavity 22 is further ensured, because the die cavity 22 is formed by butting the transition groove and the forming groove, the lower surface of the sleeve stress ring 11 and the lower surface of the upsetting die inner core 10 are sealed above the transition groove and the forming groove, and the metal is prevented from flowing between the sleeve stress ring 11 and the material containing cavity outer sleeve 7.
The die is also provided with a piece ejecting device which is provided with an ejector rod 3 capable of moving up and down; the center of the die carrier base plate 2 and the die carrier base 1 is provided with a mandril hole for the mandril 3 to move up and down, and the mandril hole and the die hole are coaxially arranged and communicated.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the specific embodiments of the present invention can be modified or substituted with equivalents with reference to the above embodiments, and any modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims to be appended.
Claims (10)
1. A method for processing a male shaft of an intermediate shaft of an automobile steering system is characterized by comprising the following steps:
firstly, cutting a spheroidizing annealed bar stock according to the designed length of a male shaft, putting the cut spheroidizing annealed bar stock into an upsetting-extruding forming die, and extruding one end of the bar stock in a cold state to enable the material to radially flow to form a T-shaped head so as to obtain a T-shaped blank, wherein the other end of the bar stock is a shaft part of the T-shaped blank;
step two, leaving a boss after extrusion at the center of the end face of the T-shaped head of the T-shaped blank, and cutting the boss by adopting a disc milling cutter or a lathe;
step three, smearing a lubricant on the T-shaped head of the T-shaped blank, then bending two wings of the T-shaped head oppositely by adopting an extrusion bending die, and forming an arc to obtain a U-shaped fork at the end part of the male shaft and an inner groove of the U-shaped fork;
fourthly, after burrs on the obtained U-shaped fork are removed, the allowance of the end part of the U-shaped fork is cut off by a punch;
step five, performing surface lubrication treatment on the blank obtained by the step four, and then performing cold extrusion to form the external spline of the shaft part to obtain a required male shaft blank, wherein the spline and the U-shaped fork part of the blank are not subjected to supplementary machining;
and step six, performing supplementary machining on the obtained male shaft blank to the size of a finished product, and performing heat treatment to the strength and hardness required by the technology to obtain a male shaft finished product.
2. An upsetting and extruding forming die used for the male shaft processing method as claimed in claim 1, wherein the upsetting and extruding forming die comprises an upper die and a lower die, a male die (15) and an elastic pressing mechanism are arranged in the upper die, the elastic pressing mechanism is used for enabling the upper die and the lower die to be tightly matched, and the diameter of the male die (15) is matched with the head end of a bar stock to be formed; the die hole of the lower die is provided with a die cavity (22) for forming the T-shaped head, and when the male die (15) presses down the bar stock in the extrusion die hole, the material at the head end of the bar stock flows downwards and flows into the die cavity (22) along the radial direction to form the T-shaped head.
3. The upsetting-extruding die as recited in claim 2, wherein the upper die comprises a die sealing upper seat (20) and a die sealing seat stand (18), the die sealing seat stand (18) is fixed on the lower surface of the die sealing upper seat (20), the elastic pressing mechanism is fixed in a mounting groove corresponding to the die sealing upper seat (20) and the die sealing seat stand (18), and the lower end of the elastic pressing mechanism extends out of the mounting groove; the center of the die sealing seat table (18) is provided with a mounting hole for mounting the male die (15), the upper end face of the male die (15) abuts against a male die cushion block (17) in the mounting hole, and the male die (15) is fixed in the mounting hole through a locking mechanism.
4. The upsetting and extruding die as recited in claim 3, wherein the upper end of the punch (15) is tapered, the locking mechanism is a locking ring (16) with external threads, the wall of the mounting hole is internally threaded, and the locking ring (16) is sleeved on the upper end of the punch (15) to fix the punch (15) on the die sealing seat (18) through the cooperation of the internal threads and the external threads.
5. The upsetting press as recited in claim 3, wherein said elastic pressing mechanism is a nitrogen spring (19).
6. The upsetting-extruding die as recited in claim 3, wherein the lower die comprises a lower cavity inner core (5), a radial extruding inner core (8) and an upsetting die inner core (10) which are arranged from bottom to top, a concentric lower cavity outer sleeve (4) is arranged outside the lower cavity inner core (5), a concentric material containing cavity outer sleeve (7) is arranged outside the radial extruding inner core (8), a concentric sleeve head stress ring (11) is arranged outside the upsetting die inner core (10), the central holes of the lower cavity inner core (5), the radial extruding inner core (8) and the upsetting die inner core (10) are formed with the die holes in a vertically corresponding manner, two forming grooves are arranged in the radial direction in the middle of the upper surface of the material containing cavity outer sleeve (7), the two forming grooves are respectively arranged on two sides of the die hole and are in a shape of a Chinese character 'yi', and transition grooves butted with the forming grooves are formed on the top surface of the radial extruding inner core (8), the transition groove and the forming groove are butted to form a die cavity (22) for forming the T-shaped head.
7. The upsetting-extruding forming die as recited in claim 6, wherein the sleeve head stress ring (11) and the material containing cavity outer sleeve (7) and the lower cavity outer sleeve (4) are installed in a matched mode through a convex-concave structure; the lower cavity outer sleeve (4) is fixed in the die carrier, and a guide pillar (9) and a guide sleeve are arranged between the material containing cavity outer sleeve (7) and the sleeve head stress ring (11).
8. The upsetting-extruding die as recited in claim 6, wherein a limiting mechanism and a guiding mechanism are further arranged between the upper die and the lower die, the limiting mechanism and the guiding mechanism are both arranged along the circumferential direction of the die, the limiting mechanism is used for limiting the limit position of the return stroke of the upper die, and the guiding mechanism provides guiding for the pressing down of the upper die.
9. The upsetting and extruding die as recited in claim 8, wherein said limiting mechanism is a distance rod screw (13), after the distance rod screw (13) passes through said die sealing seat (18), the threaded end of the distance rod screw (13) and the sleeve head stress ring (11) are in threaded connection, the screw head extends into a limiting hole of said die sealing upper seat (18), and when the upper die returns, the screw head is blocked at the bottom of said limiting hole to play a role of limiting the return limit position of the upper die.
10. The upsetting and extrusion die as recited in claim 8, wherein said guiding mechanism comprises a guiding rod (14) and a guiding sleeve (12), said guiding sleeve (12) is mounted on the die sealing seat (18), said guiding rod (14) is disposed in said guiding sleeve (12), the bottom end of said guiding rod (14) is fixed on said sleeve head stress ring (11), and the top end of said guiding rod (14) is movably disposed in the guiding hole of the die sealing upper seat (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911345824.1A CN111015136B (en) | 2019-12-24 | 2019-12-24 | Method and die for machining male shaft of intermediate shaft of automobile steering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345824.1A CN111015136B (en) | 2019-12-24 | 2019-12-24 | Method and die for machining male shaft of intermediate shaft of automobile steering system |
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| CN111015136A true CN111015136A (en) | 2020-04-17 |
| CN111015136B CN111015136B (en) | 2021-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
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| JPS6153137B2 (en) * | 1978-12-02 | 1986-11-17 | Ntn Toyo Bearing Co Ltd | |
| JPS62104644A (en) * | 1985-10-30 | 1987-05-15 | Tsuda Kogyo Kk | Manufacture of yoke universal joint having shank |
| CN201659244U (en) * | 2010-03-10 | 2010-12-01 | 浙江正昌锻造股份有限公司 | Die forging mold |
| CN102284838A (en) * | 2011-07-12 | 2011-12-21 | 上海运良企业发展有限公司 | Heavy truck sleeve fork forge piece manufacturing process |
| CN105583351A (en) * | 2015-12-19 | 2016-05-18 | 许昌中兴锻造有限公司 | Horizontal forging technology for middle-sized spline shaft yoke |
| CN107671225A (en) * | 2017-10-25 | 2018-02-09 | 江苏理研科技股份有限公司 | A kind of moulding process of special-shaped bent axle |
| CN109909411A (en) * | 2019-04-22 | 2019-06-21 | 中北大学 | A kind of High-performance Magnesium Rare-earth Alloys base differential circulation expansion extrusion forming method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
| CN115415745B (en) * | 2022-09-09 | 2024-01-26 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging with hole shafting |
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