CN213763720U - Steering engine pinion shaft extrusion forming die - Google Patents
Steering engine pinion shaft extrusion forming die Download PDFInfo
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- CN213763720U CN213763720U CN202022488446.7U CN202022488446U CN213763720U CN 213763720 U CN213763720 U CN 213763720U CN 202022488446 U CN202022488446 U CN 202022488446U CN 213763720 U CN213763720 U CN 213763720U
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Abstract
The utility model discloses a steering gear pinion shaft extrusion forming die, it includes: the terrace die with be located the terrace die below the die and constitute, the die include: the die comprises a prestress ring, a die core and a forming lower punch, wherein the die core is positioned on the inner side of the prestress ring, the forming lower punch is positioned in the die core, the male die comprises a movable upper punch and an upper punch sleeve which is sleeved on the outer side of the movable upper punch, the die can solve the problem that a special-shaped hole is difficult to process by extruding a special-shaped hole of a pinion shaft and two end positioning center holes, the two end positioning center holes are extruded and formed in the same die cavity at the same time, the problem that the subsequent machining and positioning of a forged piece are difficult to process can be solved, the dimensional stability and the material utilization rate of a product are improved, the performance of the product is optimized, and the subsequent machining efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automobile accessory production, in particular to a steering engine pinion shaft extrusion forming die.
Background
The steering engine adopts the energy required by the automobile steering of the power steering system, and under the normal condition, only a small part of the steering engine is the physical energy provided by a driver, and the majority of the steering engine is the hydraulic energy or the air pressure energy provided by an oil pump or an air compressor driven by an engine or a motor. Part of mechanical energy output by an engine or a motor is converted into pressure energy, and hydraulic or pneumatic acting forces in different directions are applied to a certain driving piece in a steering transmission device or a steering gear under the control of a driver so as to help the driver to apply insufficient force to a series of parts, which are collectively called power steering gears.
In the prior art, for different specifications steering engine pinion shaft, mostly adopt traditional processing modes such as car, mill, bore, such processing mode has the material the utilization ratio low, finished product production efficiency is low, production auxiliary cost is high, product performance shortcomings such as general.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides the steering engine pinion shaft extrusion forming die, the production efficiency can be improved by simultaneously extruding special-shaped holes and positioning central holes at two ends of a blank, the product size is stable, the material is effectively utilized, the product performance is optimized, and the subsequent machining efficiency is improved.
The technical scheme is as follows: in order to achieve the above object, the present invention provides an extrusion molding die for a steering gear pinion shaft, comprising: the terrace die with be located the terrace die below the die and constitute, the die include: the male die comprises a movable upper punch and an upper punch sleeve sleeved on the outer side of the movable upper punch.
As the utility model discloses a further preferred, prestressing force circle include outer lane and well circle, the outer lane cover is established in the outside of well circle, outer lane and well circle are interference fit and connect.
As the utility model discloses a further preferred, the mold core includes the mold core and is located the lower mold core of mold core below, go up the mold core and be the loop configuration with lower mold core, go up the mold core and be equipped with mobile top punch, go up the punch holder cover, be equipped with the shaping bottom punch in the lower mold core.
As the utility model discloses a further preferred, mold core, center ring and outer lane interference fit and coaxial line in proper order from inside to outside guarantee the axiality in later stage extrusion's part both ends hole.
As a further optimization of the utility model, the upper punch head and the upper punch head sleeve are in clearance fit connection, and the clearance is 0.01mm-0.02 mm.
As the utility model discloses a further preferred, go up the punch sleeve and be connected for clearance fit with last mold core, the clearance is 0.03mm-0.05mm, through the accumulative total stack of data, makes the clearance between last punch and last mold core be 0.04mm-0.07mm, because of the punch sleeve contacts mold core 2 earlier, so through setting up the clearance, guaranteed the concentricity of last punch, last mold core during operation.
As the further optimization of the utility model, the lower mold core is connected with the lower molding punch in a clearance fit way, and the clearance is 0.05mm-0.06 mm.
The upper mold core and the lower mold core are made of hard alloy, so that the hardness and the abrasion resistance of the mold core can be enhanced, the service life of the mold is prolonged, and the size of the obtained forged piece is ensured to be good.
The upper punch is made of powder high-speed steel ASP30 material with the hardness of HRC64-66, and the lower punch is made of high-speed steel SKH55 material with the hardness of HRC 61-63.
Has the advantages that: compared with the prior art, the pinion shaft extrusion forming die for the steering engine, disclosed by the invention, has the advantages that the special-shaped holes of the pinion shaft are extruded and the two end positioning central holes are utilized, so that the problem that the special-shaped holes are difficult to machine, and the two end positioning central holes are extruded and formed in the same die cavity at the same time, so that the problem that the forged piece is difficult to machine and position subsequently after forging is solved, the dimensional stability and the material utilization rate of the product are improved, the performance of the product is optimized, and the subsequent machining efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a female die of the present invention;
fig. 2 is a schematic view of the machined blank.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
As shown in fig. 1, the steering gear pinion shaft extrusion forming die according to the present invention comprises: the device comprises a prestressed ring 1, a mold core 2 positioned on the inner side of the prestressed ring 1, a forming lower punch 4 positioned in the mold core 2, a movable upper punch 3 positioned above the prestressed ring 1, and an upper punch sleeve 5 sleeved on the outer side of the movable upper punch 3.
The prestress ring 1 comprises an outer ring 11 and a middle ring 12 positioned on the inner side of the outer ring 11, the mold core 2 comprises an upper mold core 21 and a lower mold core 22 positioned below the upper mold core 21, the upper mold core 21 and the lower mold core 22 are of annular structures, a blank 10 is arranged in the upper mold core 21, a movable upper punch 3 and an upper punch sleeve 5 are arranged in the upper mold core 21, and a forming lower punch 4 is arranged in the lower mold core 22.
Example 1
(a) Stock preparation
Sawing the round bar stock according to the required size to obtain a blank 10;
(b) chamfering
C2 chamfers are formed at two ends of the blank;
(c) thermal treatment
Spheroidizing annealing treatment is carried out on the chamfered blank 10, the blank 10 is placed in an annealing furnace, the temperature is maintained for 5h after the blank is heated to 740 ℃, then the temperature in the furnace is reduced to 660 ℃, the temperature is maintained for 5h, then the temperature in the furnace is reduced to 550 ℃, then the blank is cooled to 400 ℃ in the furnace, and the blank is taken out of the furnace and cooled to room temperature;
(d) shot blasting
Performing shot blasting treatment on the blank 10 after the heat treatment; adopting steel shots or triangular shot shots with the diameter of 0.6mm, performing shot blasting for 15min until the surface has no bright color and light reflection, and fully distributing fine pits;
(e) skin membrane
Performing skin membrane treatment on the blank after shot blasting; the possibility of direct metal-to-metal contact is reduced;
(f) extrusion molding
Step one, a blank 10 with a prepared leather membrane is placed in an upper mold core 21, and an air hammer is pressed down to drive an upper punch 3 and an upper punch sleeve 5 to move downwards;
in the second step, in the descending process, the upper punch sleeve 5 contacts the upper die core 21 in the die core 2 firstly, and the concentricity of the upper punch 3 and the blank is ensured to be within 0.07mm when contacting; at the moment, the equipment rotates rapidly and descends slowly, the upper punch 3 is contacted with the blank firstly, and the upper hole is formed to the lower end of the upper punch sleeve 5 in one step; the equipment continues to move downwards to drive the upper punch 3, and the blank of the upper punch sleeve 5 moves downwards simultaneously to contact with the lower forming punch 4 for forming;
step three, equipment moves upwards in a return stroke, the friction force of the complete contact between the excircle of the formed workpiece and the lower die core 2 is greater than the friction force between the upper punch 3 and the upper hole of the workpiece, and the workpiece is retained in the die core 2;
and step four, after the return stroke is finished, the lower cylinder of the equipment ejects the lower punch 4 out to drive the formed workpiece to eject out of the mold core 2, and the lower cylinder of the equipment returns to the original point, so that one-time extrusion forming is finished.
Example 2
(a) Stock preparation
Sawing the round bar stock according to the required size to obtain a blank 10;
(b) chamfering
C2 chamfers are formed at two ends of the blank;
(c) thermal treatment
Spheroidizing annealing treatment is carried out on the chamfered blank 10, the blank 10 is placed in an annealing furnace, heating is carried out until the temperature is 760 ℃, heat preservation is carried out for 6h, then the temperature in the furnace is reduced to 680 ℃, heat preservation is carried out for 6h, then the temperature in the furnace is reduced to 550 ℃, then the temperature in the furnace is cooled to 400 ℃, and the blank is taken out of the furnace and cooled to room temperature;
(d) shot blasting
Performing shot blasting treatment on the blank 10 after the heat treatment; adopting steel shots or triangular shot shots with the diameter of 0.8mm, performing shot blasting for 25min until the surface has no bright color and light reflection, and fully distributing fine pits;
(e) skin membrane
Performing skin membrane treatment on the blank after shot blasting; the possibility of direct metal-to-metal contact is reduced;
(f) extrusion molding
Step one, a blank 10 with a prepared skin membrane is placed in an upper mold core 21, and a hydraulic press is pressed down to drive an upper punch 3 and an upper punch sleeve 5 to move downwards;
in the second step, in the descending process, the upper punch sleeve 5 firstly contacts the upper die core 21 in the die core 2 so as to ensure that the upper punch 3 is concentric to 0.07mm when contacting the blank; at the moment, the equipment rotates rapidly and descends slowly, the upper punch 3 is contacted with the blank firstly, and the upper hole is formed to the lower end of the upper punch sleeve 5 in one step; the equipment continues to move downwards to drive the upper punch 3, and the blank of the upper punch sleeve 5 moves downwards simultaneously to contact with the lower forming punch 4 for forming;
step three, equipment moves upwards in a return stroke, the friction force of the complete contact between the excircle of the formed workpiece and the lower die core 2 is greater than the friction force between the upper punch 3 and the upper hole of the workpiece, and the workpiece is retained in the die core 2;
and step four, after the return stroke is finished, the lower cylinder of the equipment ejects the lower punch 4 out to drive the formed workpiece to eject out of the mold core 2, and the lower cylinder of the equipment returns to the original point, so that one-time extrusion forming is finished.
Claims (7)
1. A steering gear pinion shaft extrusion forming die is characterized by comprising: the terrace die with be located the terrace die below the die and constitute, the die include: the device comprises a prestressed ring (1), a mold core (2) positioned on the inner side of the prestressed ring (1) and a forming lower punch (4) positioned in the mold core (2), wherein the male die comprises a movable upper punch (3) and an upper punch sleeve (5) sleeved on the outer side of the movable upper punch (3).
2. The steering gear pinion shaft extrusion molding die of claim 1, wherein: the prestressed ring (1) comprises an outer ring (11) and a middle ring (12), wherein the outer ring (11) is sleeved on the outer side of the middle ring (12).
3. The steering gear pinion shaft extrusion molding die of claim 1, wherein: the mold core (2) comprises an upper mold core (21) and a lower mold core (22) positioned below the upper mold core (21), and the upper mold core (21) and the lower mold core (22) are of annular structures.
4. The steering gear pinion shaft extrusion molding die of claim 3, wherein: the mold core (2), the middle ring (12) and the outer ring (11) are in interference fit and coaxial in sequence from inside to outside.
5. The steering gear pinion shaft extrusion molding die of claim 1, wherein: the upper punch head (3) and the upper punch head sleeve (5) are in clearance fit connection, and the clearance is 0.01mm-0.02 mm.
6. The steering gear pinion shaft extrusion molding die of claim 1, wherein: the upper punch sleeve (5) is in clearance fit connection with the upper die core (21), and the clearance is 0.03mm-0.05 mm.
7. The steering gear pinion shaft extrusion molding die of claim 3, wherein: the lower die core (22) is in clearance fit connection with the lower forming punch (4), and the clearance is 0.05mm-0.06 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022488446.7U CN213763720U (en) | 2020-11-02 | 2020-11-02 | Steering engine pinion shaft extrusion forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022488446.7U CN213763720U (en) | 2020-11-02 | 2020-11-02 | Steering engine pinion shaft extrusion forming die |
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| Publication Number | Publication Date |
|---|---|
| CN213763720U true CN213763720U (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022488446.7U Active CN213763720U (en) | 2020-11-02 | 2020-11-02 | Steering engine pinion shaft extrusion forming die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247814A (en) * | 2021-12-23 | 2022-03-29 | 湖南顶立科技有限公司 | Extrusion forming device and die pressing method |
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2020
- 2020-11-02 CN CN202022488446.7U patent/CN213763720U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114247814A (en) * | 2021-12-23 | 2022-03-29 | 湖南顶立科技有限公司 | Extrusion forming device and die pressing method |
| CN114247814B (en) * | 2021-12-23 | 2023-12-05 | 湖南顶立科技有限公司 | Extrusion molding device and molding method |
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