CN111941010A - Processing method of high-strength door hinge of new energy automobile - Google Patents
Processing method of high-strength door hinge of new energy automobile Download PDFInfo
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- CN111941010A CN111941010A CN202010836449.7A CN202010836449A CN111941010A CN 111941010 A CN111941010 A CN 111941010A CN 202010836449 A CN202010836449 A CN 202010836449A CN 111941010 A CN111941010 A CN 111941010A
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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 provides a method for processing a high-strength door hinge of a new energy automobile, which comprises the steps of blanking, deburring, preheating, upsetting, heating, bending, heating, pre-forging, alkali washing and pickling, polishing, heating, final forging, trimming, solution treatment, aging treatment, vibration grinding, alkali washing and pickling and shot blasting. And the shape of the raw material is closer to the shape of the die cavity of the pre-forging die by bending after upsetting, and the die cavity of the pre-forging die can be filled with the raw material positioned in the pre-forging die only by deforming to the periphery by a small amplitude during pre-forging processing, so that the pre-forging processing efficiency is improved. The product forming process is divided into two parts of pre-forging and finish forging, so that the product with more delicate surface characteristics can be formed. After the finish forging is finished, the product is subjected to solution treatment and aging treatment, so that the product can have higher hardness, higher tensile strength and higher yield strength.
Description
Technical Field
The invention relates to automobile parts, in particular to a method for machining a high-strength door hinge of a new energy automobile.
Background
With the progress of science and technology, the automobile as a walking tool gradually enters the family, and the quality requirement and the safety requirement of consumers on the automobile are gradually improved. Door hinges are used for connecting a vehicle door and a vehicle frame in an automobile, and are frequently used, so that the door hinges are required to have high strength, high tensile strength and high yield strength. However, in view of the limitations of metal materials, it is important to process the brake caliper body of the automobile in the simplest process while satisfying the above requirements, and a problem to be solved is urgently needed.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for processing a high-strength door hinge of a new energy automobile, which has the advantages that the produced door hinge has high hardness, high tensile strength and high yield strength.
In order to solve the technical problems, the technical scheme of the invention is as follows: a processing method of a high-strength door hinge of a new energy automobile comprises the following steps:
the method comprises the following steps: blanking, namely cutting the raw material by using a belt sawing machine;
step two: deburring, namely processing burrs and acute angles on the surface of the raw material by using a polishing machine;
step three: preheating, namely putting the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step four: upsetting, and extruding the raw material by using a press;
step five: heating, namely placing the raw materials into a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step six: bending, namely pressing the middle part of the blank by using a press machine to bend the blank;
step seven: heating, namely placing the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step eight: pre-forging, namely placing the raw material in a pre-forging die, extruding the pre-forging die by using a press machine, and extruding and deforming the raw material in the pre-forging die into a semi-finished product;
step nine: performing alkaline washing and acid washing, namely corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, rinsing by using clear water, corroding for 30-90 seconds by using acid water with the pH value of less than 4, rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 60-80 ℃;
step ten: polishing, namely polishing the pits on the surface of the semi-finished product by using an electric grinder to ensure that the surface of the semi-finished product becomes smoother and smoother;
step eleven: heating, namely placing the semi-finished product in a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step twelve: finish forging, namely placing the semi-finished product into a finish forging die, and extruding the finish forging die by using a press machine to enable the semi-finished product in the finish forging die to be extruded and deformed into a finished product;
step thirteen: trimming, namely cutting off the flash at the edge of the finished product by using a punch;
fourteen steps: solid solution treatment, namely putting the finished product into a solid melting furnace at the temperature of 525-535 ℃ and preserving the temperature for 90 minutes;
step fifteen: aging treatment, namely placing the finished product into an aging furnace with the aging temperature of 165-175 ℃ and preserving the temperature for 660 minutes;
sixthly, the steps are as follows: performing vibration grinding, namely grinding the product by using a vibration grinder, and controlling the vibration time to be 25 minutes;
seventeen steps: performing alkaline washing and acid washing, namely firstly corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, then rinsing by using normal-temperature clear water, then corroding for 30-90 seconds by using acid water with the pH value of less than 4, then rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 50-90 ℃;
eighteen steps: and (4) performing shot blasting, namely performing roll blasting by using a crawler type shot blasting machine, and controlling shot blasting time to be 7 minutes.
According to the technical scheme, before the pre-forging, the raw material is upset firstly, and then the raw material is bent, so that the shape of the raw material is closer to that of the die cavity of the pre-forging die, therefore, when the pre-forging is performed, the raw material positioned in the pre-forging die can fill the die cavity of the pre-forging die only by deforming to the periphery by a small amplitude, and the processing efficiency of the pre-forging is improved. The product forming process is divided into two parts of pre-forging and finish forging, so that the product with more delicate surface characteristics can be formed. After the finish forging is finished, the product is subjected to solution treatment and aging treatment, so that the product can have high hardness which can reach 100 Brinell hardness, high tensile strength which can reach 345 MPa, high yield strength which can reach 315 MPa. The product needs to undergo two processes of alkali washing and acid washing, so that oxide scales and corrosive substances on the surface of the product can be more sufficiently removed.
Preferably, a nineteen step is further provided between the seventh step and the eighth step: the pre-forging die is heated, an iron plate with the temperature of 750 ℃ is placed on the pre-forging die, and then the upper die and the lower die are closed for 20 minutes for preheating.
Through the technical scheme, if the temperature of the pre-forging die is low, after the raw material is placed inside the pre-forging die, a large amount of heat contained in the raw material can be conducted to the pre-forging die due to the fact that the temperature difference between the raw material and the pre-forging die is large, the temperature of the surface of the raw material is reduced, and the ductility of the surface of the raw material is reduced. The situation will not occur after the preforging die is heated, which is helpful for the normal preforging.
Preferably, a step twenty is further provided between the step eleven and the step twelve: heating a finish forging die, placing an iron plate at 750 ℃ on the finish forging die, and then closing an upper die and a lower die for 20 minutes for preheating.
Through the technical scheme, if the temperature of the finish forging die is low, after the raw material is placed inside the finish forging die, the temperature difference between the raw material and the finish forging die is large, so that the heat contained in the raw material is conducted to the finish forging die, the temperature of the surface of the raw material is reduced, and the ductility of the surface of the raw material is reduced. However, the above-mentioned situation does not occur after the finish forging die is heated, and the normal finish forging is facilitated.
Preferably, the finish forging die in the twelfth step comprises a die body and a die core embedded in the top of the die body, and a forming groove for placing the semi-finished product is formed in the top of the die core in a recessed manner.
Through the technical scheme, the die core is embedded in the die body, so that the die core with different shapes of the grooves can be replaced according to products with different shapes, and the applicability of the finish forging die is improved to a certain extent.
Preferably, the top of mould body is provided with the installation annular, the installation annular surrounds mould benevolence, swivelling joint has the swivel becket in the installation annular, the top surface evenly distributed of swivel becket has a plurality of spouts, the spout is followed the axial setting of swivel becket, each the inside ejector pin that all slides of spout is connected with, just the ejector pin can accomodate completely to inside the spout, each the inside spring that all is provided with of spout, the spring be used for with the one end of ejector pin is ejecting the spout, still be provided with actuating mechanism on the mould body, actuating mechanism is used for the drive swivel becket circumferential direction rotates.
Through the technical scheme, the side wall of the semi-finished product formed by pre-forging can be provided with the flash. When the semi-finished product needs to be reprocessed, the semi-finished product needs to be reheated to improve the ductility of the semi-finished product. The temperature of the heated semi-finished product is high, and workers can only move the semi-finished product into a forming groove by tools such as pliers and the like for safety. And remove semi-manufactured goods's in-process through instruments such as pliers, hardly put into the shaping inslot with semi-manufactured goods is accurate, so just so need the workman to adjust semi-manufactured goods's position through the pliers, until semi-manufactured goods can accurately enter into the shaping inslot, whole process need spend the time longer, has reduced the production efficiency of hinge.
Therefore, the die body is improved to improve the production efficiency of the door hinge.
When a worker puts the semi-finished product with the flash above the forming groove and the semi-finished product is not completely opposite to the forming groove, the ejector rod opposite to the flash is gradually pressed into the sliding groove, when the bottom of the semi-finished product is abutted against the groove bottom of the forming groove, the top of the ejector rod opposite to the flash still protrudes out of the groove opening of the sliding groove, and the ejector rod not opposite to the flash can be abutted against the edge of the flash to limit the semi-finished product. And then the rotating ring is controlled by the driving mechanism to rotate in the circumferential direction, and the rotating ring drives the semi-finished product to rotate in the circumferential direction through the ejector rod. When the semi-finished product is accurately opposite to the forming groove, the semi-finished product continues to move downwards, the ejector rod opposite to the flash is completely pressed into the sliding groove, and the driving mechanism can be stopped at the moment. So do not need the workman to use the pliers to be used for adjusting semi-manufactured goods position, can practice thrift a large amount of time, promoted the production efficiency of hinge in the very big degree.
Preferably, the driving mechanism comprises a gear ring sleeved on the rotating ring, a transmission gear rotatably connected in the die body and meshed with the gear ring, and a driving motor for driving the transmission gear to rotate circumferentially.
Through above-mentioned technical scheme, driving motor during operation drives drive gear and carries out circumferential direction, and drive gear accessible ring gear drive rotating ring carries out circumferential direction. The outer diameter of the gear ring is larger than that of the transmission gear, so that the rotating speed of the rotating ring can be reduced.
Preferably, a contact switch is arranged at the bottom of the forming groove and electrically connected to the driving motor, and when the semi-finished product abuts against the contact switch, the contact switch closes the driving motor.
Through above-mentioned technical scheme, when semi-manufactured goods and shaping groove are accurate relative, semi-manufactured goods can move down and touch with the contact switch of shaping groove bottom, and contact switch closes driving motor. Therefore, a worker does not need to manually close the driving motor, and the final forging process of the door hinge is more convenient and quicker.
Preferably, the die body is provided with a heat insulation plate, and the driving motor is installed on the end face, far away from the die body, of the heat insulation plate.
Through above-mentioned technical scheme, the heat insulating board can the thermal transmission of separation for driving motor is difficult because of overheated damage.
Drawings
FIG. 1 is a schematic cross-sectional view of a finish forging die;
fig. 2 is an enlarged view of a portion a of fig. 1.
Reference numerals: 1. a mold body; 2. a mold core; 3. forming a groove; 4. mounting a ring groove; 5. a rotating ring; 6. a chute; 7. a top rod; 8. a spring; 9. a drive mechanism; 91. a ring gear; 92. a transmission gear; 93. a drive motor; 10. a contact switch; 11. an insulating panel.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
A processing method of a high-strength door hinge of a new energy automobile comprises the following steps:
the method comprises the following steps: blanking, namely cutting the raw material by using a belt sawing machine;
step two: deburring, namely processing burrs and acute angles on the surface of the raw material by using a polishing machine;
step three: preheating, namely putting the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step four: upsetting, and extruding the raw material by using a press;
step five: heating, namely placing the raw materials into a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step six: bending, namely pressing the middle part of the blank by using a press machine to bend the blank;
step seven: heating, namely placing the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
nineteen steps: heating a pre-forging die, placing an iron plate at 750 ℃ on the pre-forging die, and then closing an upper die and a lower die for 20 minutes for preheating;
step eight: pre-forging, namely placing the raw material in a pre-forging die, extruding the pre-forging die by using a press machine, and extruding and deforming the raw material in the pre-forging die into a semi-finished product;
step nine: performing alkaline washing and acid washing, namely corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, rinsing by using clear water, corroding for 30-90 seconds by using acid water with the pH value of less than 4, rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 60-80 ℃;
step ten: polishing, namely polishing the pits on the surface of the semi-finished product by using an electric grinder to ensure that the surface of the semi-finished product becomes smoother and smoother;
step eleven: heating, namely placing the semi-finished product in a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
twenty steps: heating a finish forging die, placing an iron plate at 750 ℃ on the finish forging die, and then closing an upper die and a lower die for 20 minutes for preheating;
step twelve: finish forging, namely placing the semi-finished product into a finish forging die, and extruding the finish forging die by using a press machine to enable the semi-finished product in the finish forging die to be extruded and deformed into a finished product;
step thirteen: trimming, namely cutting off the flash at the edge of the finished product by using a punch;
fourteen steps: solid solution treatment, namely putting the finished product into a solid melting furnace at the temperature of 525-535 ℃ and preserving the temperature for 90 minutes;
step fifteen: aging treatment, namely placing the finished product into an aging furnace with the aging temperature of 165-175 ℃ and preserving the temperature for 660 minutes;
sixthly, the steps are as follows: performing vibration grinding, namely grinding the product by using a vibration grinder, and controlling the vibration time to be 25 minutes;
seventeen steps: performing alkaline washing and acid washing, namely firstly corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, then rinsing by using normal-temperature clear water, then corroding for 30-90 seconds by using acid water with the pH value of less than 4, then rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 50-90 ℃;
eighteen steps: and (4) performing shot blasting, namely performing roll blasting by using a crawler type shot blasting machine, and controlling shot blasting time to be 7 minutes.
As shown in fig. 1, the finish forging die in the twelfth step includes a die body 1 and a die core 2 embedded in the top of the die body 1. When in use, different die cores 2 can be replaced according to the size and the shape of the door hinge so as to improve the applicability of the finish forging die. The top surface of the die core 2 is concavely provided with a forming groove 3, and a semi-finished product put into the forming groove 3 can be formed into a finished product after being extruded by a press machine.
As shown in fig. 1 and 2, the top surface of the mold body 1 is further provided with an installation ring groove 4, the installation ring groove 4 is communicated with the caulking groove for installing the mold core 2 on the mold body 1, the groove depth of the installation ring groove 4 is smaller than that of the caulking groove, and the mold core 2 is surrounded by the installation ring groove 4. The installation ring groove 4 is internally provided with a rotating ring 5, the outer ring of the rotating ring 5 is tightly propped against the inner groove wall of the installation ring groove 4, the inner ring of the rotating ring 5 is tightly propped against the outer wall of the mold core 2, and the rotating ring 5 can rotate in the circumferential direction in the installation ring groove 4 under the action of external force. A plurality of sliding grooves 6 are uniformly arranged on the top surface of the rotating ring 5, and each sliding groove 6 extends along the axial direction of the rotating ring 5. An ejector rod 7 is connected inside each sliding groove 6 in a sliding mode, and the length of the ejector rod 7 is smaller than the depth of the sliding groove 6. A spring 8 is further arranged inside each sliding groove 6, one end of each spring 8 is connected with the bottom of each sliding groove 6, the other end of each spring 8 is connected with the bottom of the corresponding ejector rod 7, and when the springs 8 are in a balance state, the tops of the ejector rods 7 protrude out of the notches of the sliding grooves 6.
The bottom of the die body 1 is provided with a heat insulation plate 11, and the heat insulation plate 11 can block heat conduction.
The die body 1 is further provided with a driving mechanism 9, and the driving mechanism 9 is connected with the rotating ring 5 and used for driving the rotating ring 5 to rotate circumferentially. The drive mechanism 9 includes a ring gear 91, a transmission gear 92, and a drive motor 93. The gear ring 91 is sleeved on the rotating ring 5, and the gear ring 91 is coaxially connected with the rotating ring 5. The transmission gear 92 is rotatably connected in the die body 1, and the transmission gear 92 is meshed with the ring gear 91. The driving motor 93 is installed on the end face of the heat insulation plate 11 far away from the mold body 1, the output shaft of the driving motor 93 is connected with the transmission gear 92, and the driving motor 93 is used for driving the transmission gear 92 to rotate circumferentially.
A contact switch 10 is arranged at the bottom of the forming groove 3, and the contact switch 10 can control the driving motor 93 to be turned off when contacting with the semi-finished product.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (8)
1. A processing method of a high-strength door hinge of a new energy automobile is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: blanking, namely cutting the raw material by using a belt sawing machine;
step two: deburring, namely processing burrs and acute angles on the surface of the raw material by using a polishing machine;
step three: preheating, namely putting the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step four: upsetting, and extruding the raw material by using a press;
step five: heating, namely placing the raw materials into a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step six: bending, namely pressing the middle part of the blank by using a press machine to bend the blank;
step seven: heating, namely placing the raw materials into a resistance furnace with the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step eight: pre-forging, namely placing the raw material in a pre-forging die, extruding the pre-forging die by using a press machine, and extruding and deforming the raw material in the pre-forging die into a semi-finished product;
step nine: performing alkaline washing and acid washing, namely corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, rinsing by using clear water, corroding for 30-90 seconds by using acid water with the pH value of less than 4, rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 60-80 ℃;
step ten: polishing, namely polishing the pits on the surface of the semi-finished product by using an electric grinder to ensure that the surface of the semi-finished product becomes smoother and smoother;
step eleven: heating, namely placing the semi-finished product in a resistance furnace at the temperature of 420-450 ℃ to heat for more than 90 minutes, so as to improve the ductility of the raw materials;
step twelve: finish forging, namely placing the semi-finished product into a finish forging die, and extruding the finish forging die by using a press machine to enable the semi-finished product in the finish forging die to be extruded and deformed into a finished product;
step thirteen: trimming, namely cutting off the flash at the edge of the finished product by using a punch;
fourteen steps: solid solution treatment, namely putting the finished product into a solid melting furnace at the temperature of 525-535 ℃ and preserving the temperature for 90 minutes;
step fifteen: aging treatment, namely placing the finished product into an aging furnace with the aging temperature of 165-175 ℃ and preserving the temperature for 660 minutes;
sixthly, the steps are as follows: performing vibration grinding, namely grinding the product by using a vibration grinder, and controlling the vibration time to be 25 minutes;
seventeen steps: performing alkaline washing and acid washing, namely firstly corroding for 30-90 seconds by using alkaline water with the pH value of more than 11, then rinsing by using normal-temperature clear water, then corroding for 30-90 seconds by using acid water with the pH value of less than 4, then rinsing by using normal-temperature clear water, and finally rinsing by using hot water with the water temperature of 50-90 ℃;
eighteen steps: and (4) performing shot blasting, namely performing roll blasting by using a crawler type shot blasting machine, and controlling shot blasting time to be 7 minutes.
2. The processing method of the new energy automobile high-strength door hinge according to claim 1, characterized by comprising the following steps: a nineteen step is further arranged between the seventh step and the eighth step: the pre-forging die is heated, an iron plate with the temperature of 750 ℃ is placed on the pre-forging die, and then the upper die and the lower die are closed for 20 minutes for preheating.
3. The processing method of the new energy automobile high-strength door hinge according to claim 1, characterized by comprising the following steps: a step twenty is further arranged between the step eleven and the step twelve: heating a finish forging die, placing an iron plate at 750 ℃ on the finish forging die, and then closing an upper die and a lower die for 20 minutes for preheating.
4. The processing method of the new energy automobile high-strength door hinge according to claim 1, characterized by comprising the following steps: and the finish forging die in the step twelve comprises a die body (1) and a die core (2) embedded at the top of the die body (1), wherein a forming groove (3) for placing a semi-finished product is formed in the top of the die core (2) in a concave mode.
5. The processing method of the new energy automobile high-strength door hinge according to claim 4, characterized by comprising the following steps: the top of mould body (1) is provided with installation annular (4), installation annular (4) surround mould benevolence (2), it has swivel becket (5) to rotate in installation annular (4), the top surface evenly distributed of swivel becket (5) has a plurality of spouts (6), spout (6) are followed the axial setting of swivel becket (5), each spout (6) inside all slides and is connected with ejector pin (7), just ejector pin (7) can be accomodate completely extremely inside spout (6), each spout (6) inside all is provided with spring (8), spring (8) be used for with the one end of ejector pin (7) is ejecting spout (6), still be provided with actuating mechanism (9) on mould body (1), actuating mechanism (9) are used for driving swivel becket (5) circumferential direction.
6. The processing method of the new energy automobile high-strength door hinge according to claim 5, characterized by comprising the following steps: the driving mechanism (9) comprises a gear ring (91) sleeved on the rotating ring (5), a transmission gear (92) rotatably connected in the die body (1) and meshed with the gear ring (91), and a driving motor (93) used for driving the transmission gear (92) to rotate in the circumferential direction.
7. The processing method of the new energy automobile high-strength door hinge according to claim 6, characterized by comprising the following steps: a contact switch (10) is arranged at the bottom of the forming groove (3), the contact switch (10) is electrically connected with the driving motor (93), and when the semi-finished product abuts against the contact switch (10), the contact switch (10) closes the driving motor (93).
8. The processing method of the new energy automobile high-strength door hinge according to claim 6, characterized by comprising the following steps: the die is characterized in that a heat insulation plate (11) is arranged on the die body (1), and the driving motor (93) is installed on the end face, far away from the die body (1), of the heat insulation plate (11).
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|---|---|---|---|---|
| CN113618340A (en) * | 2021-08-20 | 2021-11-09 | 浙江同兴金属锻件股份有限公司 | Processing method of high-strength motorcycle pedal bracket |
| CN113618340B (en) * | 2021-08-20 | 2022-06-07 | 浙江同兴金属锻件股份有限公司 | Processing method of high-strength motorcycle pedal bracket |
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| CN111941010B (en) | 2022-02-08 |
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Effective date of registration: 20230109 Address after: 317016 No. 2, Donghai Third Avenue, Taizhou Bay Economic and Technological Development Zone, Linhai City, Taizhou City, Zhejiang Province (the first workshop in Zhejiang Tongxing Metal Forging Co., Ltd.) (independent application) Patentee after: Zhejiang Tongxin Metal Technology Co.,Ltd. Address before: 317016 No.2, Donghai Third Avenue, Yihua Park, Duqiao Town, Linhai City, Taizhou City, Zhejiang Province Patentee before: Zhejiang Tongxing Metal Forging Co.,Ltd. |