CN210907925U - A kind of aluminum alloy automobile control arm forging die - Google Patents

Abstract

The utility model discloses an aluminum alloy automobile control arm forging die, which comprises an upper die base and a lower die base, wherein the upper die base and the lower die base are connected through a guide pillar, and the guide pillar connected with the upper die base is provided with a guide sleeve; an upper forging groove is formed in the lower end face of the upper die base, an upper forging die is arranged in the upper forging groove, an upper insert is arranged between the upper forging die and the upper forging groove, the upper insert is fixedly connected with the upper die base, and an upper die cavity is formed in the lower surface of the upper forging die; the upper end surface of the lower die base is provided with a lower forging groove, a lower forging die is arranged in the lower forging groove, a lower insert is arranged between the lower forging die and the lower forging groove, the lower insert is fixedly connected with the lower die base, the upper surface of the lower forging die is provided with a lower die cavity, and the upper die cavity and the lower die cavity jointly define a die cavity; the blank in the cavity is reasonably distributed, the blank is saved, the utilization rate of the blank is high, the assembly and the disassembly are convenient, and the safety performance is high; and an automatic temperature intelligent control device is arranged, the forging temperature is accurately controlled, the problems of narrow forging temperature range, cracking, large and uneven crystal grains of the aluminum alloy material are solved, and the quality of the forged control arm is high.

Description

A kind of aluminum alloy automobile control arm forging die

technical field

The utility model relates to the technical field of forging, in particular to a forging die for an aluminum alloy automobile control arm.

Background technique

With the shortage of energy and the deterioration of the natural environment, energy saving and emission reduction have become an important part of the development of the manufacturing industry. Therefore, the future development trend of automobiles is lighter and more environmentally friendly. In order to make the weight of the car light, aluminum alloy materials have been widely used. The vehicle control arm has very high requirements for comprehensive mechanical properties, and the mechanical properties of directly machined parts and castings are poor. Therefore, the vehicle control arm is mainly made of 6082 aluminum alloy by forging technology. It belongs to the 6 series aluminum alloy, which contains a large amount of magnesium, silicon and other elements, and has relatively good comprehensive mechanical properties. It is widely used in the manufacture of automotive parts, such as control arms, steering rods, etc.

During the forging process of the existing automobile control arm, due to the large deformation of the step position in the middle of the control arm of some models, the cavity of the forging die is prone to defects such as insufficient filling of the blank, unreasonable distribution of the blank in the cavity, and a large amount of blank. , the utilization rate is low.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide an aluminum alloy automobile control arm forging die, the die structure is simple, the blank distribution in the cavity is reasonable, the blank is saved, the blank utilization rate is high, and the disassembly and assembly is convenient, High safety performance.

The technical scheme that realizes the purpose of the present utility model is:

An aluminum alloy automobile control arm forging die, comprising an upper die base and a lower die base, the upper die base and the lower die base are connected by a guide post, and a guide sleeve is arranged on the guide post connected with the upper die base; There is an upper forging groove facing downward, a forging upper die is arranged in the upper forging groove, and an upper insert is arranged between the forging upper die and the upper forging groove. The lower surface of the mold is provided with an upper cavity facing downward;

The upper end face of the lower die seat is provided with a lower forging groove facing upward, a lower forging die is arranged in the lower forging groove, and a lower insert is arranged between the lower forging die and the lower forging groove, and the lower insert is connected to the lower die seat through the insert screw. Fixed connection, the upper surface of the lower forging die is provided with a lower cavity facing upward, and the upper cavity and the lower cavity are matched with each other to define a cavity for forming the control arm.

The cavity includes a pre-forging cavity and a final forging cavity; one end of the cavity is provided with a first circular boss, and the other end is provided with a second circular boss and an upward groove; the first circular boss A first elongated boss and a second elongated boss are also arranged between the second round boss and the first elongated boss, and a transition groove is arranged between the first elongated boss and the second elongated boss; one side of the cavity is There is also a convex groove facing the cavity; the groove in the final forging cavity is also provided with a protrusion.

The upper insert is a trapezoidal insert with a small upper and a large lower, and the included angle between the contact surface of the trapezoidal insert and the upper forging die and the vertical direction is 5-10°.

The lower inserts are trapezoidal inserts of upper and lower sizes, and the included angle between the contact surface of the trapezoidal insert and the lower forging die and the vertical direction is 5-10°.

In the pre-forging cavity, the rounded corners of the periphery are larger than the rounded corners of the final forged cavity.

The forging upper die is provided with positioning bosses at both ends of the diagonal line, and the diagonal ends of the forging lower die are provided with positioning grooves matched with the positioning bosses, which facilitates fast and accurate positioning during die clamping.

The upper die base and the lower die base are also provided with hoisting holes, and U-shaped installation grooves are arranged at the left and right ends.

The final forging upper die, the final forging lower die, the upper insert and the lower insert are made of 5CrNiMo material through a heat treatment process; the heat treatment process is segmented heating, including quenching and tempering, and vacuum is used during quenching. The atmosphere heat treatment furnace is heated in stages, first vacuumed to above 10 ^-2 Pa, passed Ar gas to 0.05Pa for washing, so reciprocating pumping-washing for more than 3 times, and finally passing Ar gas to 0.05Pa, the whole heat treatment The process is carried out under the protection of Ar gas. The specific steps are: first, heat the mold to 450~650 °C at a heating rate of 3-5 °C/min, keep it for 3-6 h, and then slowly heat it at a heating rate of 1-3 °C/min. The temperature is raised to 820~880 ℃, and the temperature is kept for 4-8 hours. Then, after cooling to 760~820 ℃ in the air, the mold is quickly put into the oil of 30~60 ℃ to cool, and finally the mold is placed in the vacuum heat treatment furnace in time. Heat to 320~420 °C for 10-20 h for tempering.

The forging die is also provided with an automatic temperature intelligent control device, which is used to precisely control the forging temperature, and the temperature control accuracy is ±1°C.

The automatic temperature intelligent control device includes an upper temperature control seat and a lower temperature control seat, the inner walls of the upper temperature control seat and the lower temperature control seat are provided with induction coils, and the upper temperature control seat is fixed on the lower end face of the upper die seat for forging. The upper die surrounds and is higher than the lower end face of the forging upper die, the lower temperature control seat is fixed on the upper end face of the lower die seat, and the forging lower die surrounds and is higher than the upper end face of the forging lower die. The diameter of the upper temperature control seat is smaller than the diameter of the lower temperature control seat. When the mold is closed, the upper temperature control seat and the lower temperature control seat are engaged with each other. When the mold is opened, the upper and lower parts are opened, which can accurately control the forging temperature and overcome the narrow forging temperature range and cracking of aluminum alloy materials, coarse and uneven grains, etc. Defect problem to ensure the quality of the forged aluminum alloy control arm.

The utility model provides an aluminum alloy automobile control arm final forging die, the die structure is simple, the cavity is reasonably arranged with bosses, convex grooves and grooves, so that the blank distribution in the cavity is reasonable, the blank is saved, and the utilization rate of the blank is high. , and is equipped with an automatic temperature intelligent control device. The automatic temperature intelligent control device is used for precise temperature control during the forging process, which can accurately control the forging temperature and overcome the defects such as narrow forging temperature range, cracking, coarse grains and unevenness of aluminum alloy materials. , to ensure the quality of the forged aluminum alloy control arm.

Description of drawings

Fig. 1 is a three-dimensional structural diagram of a forging die for an aluminum alloy automobile control arm;

Fig. 2 is a front sectional view of an aluminum alloy automobile control arm forging die;

Fig. 3 is the structural representation of forging upper die;

Fig. 4 is a partial enlarged view of part A in Fig. 1;

In the picture: 1. Guide post 2. Guide sleeve 3. Upper die base 4. Forging upper die 5. Upper insert 6. Forging lower die 7. Lower insert 8. Insert screw 9. Lower die holder 10. Hoisting hole 11. U-shaped mounting groove 12. Final forging cavity 13. Pre-forging cavity 14. First round boss 15. First elongated boss 16. Transition groove 17. Second elongated boss 18. Protrusion 19 . Groove 20. Second circular boss 21. Convex groove 22. Positioning boss 23. Upper temperature control seat 24. Induction coil 25. Lower temperature control seat.

Detailed ways

The content of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments, but it is not intended to limit the present utility model.

Example:

As shown in FIG. 1 and FIG. 2, an aluminum alloy automobile control arm forging die includes an upper die base 3 and a lower die base 9. The upper die base 3 and the lower die base 9 are connected by a guide column 1, and are connected with the upper die base 3 The connected guide post 1 is provided with a guide sleeve 2; the lower end face of the upper die base 3 is provided with an upper forging groove facing downward, a forging upper die 4 is arranged in the upper forging groove, and a forging upper die 4 and the upper forging groove are provided with The upper insert 5, the upper insert 5 is fixedly connected with the upper die base 4 through the insert screw 8, and the lower surface of the forging upper die 4 is provided with an upper cavity facing downward;

The upper end surface of the lower die base 9 is provided with a lower forging groove facing upward, a lower forging die 6 is arranged in the lower forging groove, a lower insert 7 is arranged between the forging lower die 6 and the lower forging groove, and the lower insert 7 passes through the insert. The screw 8 is fixedly connected with the lower die base 9, the upper surface of the lower forging die 6 is provided with a lower cavity facing upward, and the upper cavity and the lower cavity match each other to define a cavity for forming the control arm.

As shown in FIG. 3, the cavity includes a pre-forging cavity 13 and a final forging cavity 12; one end of the cavity is provided with a first circular boss 14, and the other end is provided with a second circular boss 20 and a surface facing the The upward groove 19; the first elongated boss 15 and the second elongated boss 17 are also provided between the first circular boss 14 and the second circular boss 20, the first elongated boss 15 and the second elongated boss 17 A transition groove 16 is provided between the elongated bosses 17 ; a convex groove 21 facing into the cavity is also provided on one side of the cavity; the groove 19 in the final forging cavity is also provided with a protrusion 18 .

As shown in FIG. 4 , the upper insert 5 is a trapezoidal insert with a small upper and a large lower, and the angle between the contact surface of the trapezoidal insert and the upper forging die 4 and the vertical direction is 5-10°.

The lower inserts 7 are trapezoidal inserts of upper and lower sizes, and the included angle between the contact surface of the trapezoidal insert and the lower forging die 6 and the vertical direction is 5-10°.

The upper and lower inserts are set as trapezoidal inserts, which can effectively prevent the upper forging die and the lower forging die from falling, so that the upper forging die and the lower forging die are locked more firmly, the assembly and disassembly are convenient, and the safety performance is improved.

The pre-forging cavity 13 has a peripheral rounded corner larger than the peripheral rounded corner of the final forging cavity 12 .

The forging upper die 4 is provided with positioning bosses 22 at both ends of the diagonal line, and the diagonal ends of the forging lower die 6 are provided with positioning grooves matching the positioning bosses 22; it is convenient for fast and accurate mold clamping. position.

The upper die base 4 and the lower die base 9 are also provided with hoisting holes 10, and U-shaped installation grooves 11 at the left and right ends. The hoisting holes 10 are convenient for the movement of the mold, and the U-shaped installation grooves 11 are convenient for the mold to be installed on the equipment table. Installation and removal.

The final forging upper die 4, the final forging lower die 5, the upper inserts 5 and the lower inserts 7 are made of 5CrNiMo material through a heat treatment process; the heat treatment process is segmented heating, including quenching and tempering, During quenching, a vacuum atmosphere heat treatment furnace is used for segmental heating, first vacuuming to above 10 ^-2 Pa, feeding Ar gas to 0.05Pa for scrubbing, so reciprocating pumping and scrubbing for more than 3 times, and finally feeding Ar gas to 0.05 Pa Pa, the entire heat treatment process is carried out under the protection of Ar gas. The specific steps are: first, heat the mold to 450~650 °C at a heating rate of 3-5 °C/min, keep it for 3-6 h, and then heat the mold at a heating rate of 1-3 °C/min. The heating rate of the mold is slowly raised to 820~880 °C, kept for 4-8 h, and then cooled to 760~820 °C in the air for a delay, and then the mold was quickly put into the oil of 30~60 °C to cool, and finally the mold was promptly cooled. Heat to 320~420 ℃ in a vacuum heat treatment furnace for 10-20h for tempering.

As shown in Figures 1 and 2, the forging die is also provided with an automatic temperature intelligent control device for precise control of the forging temperature, and the temperature control accuracy is ±1°C.

The automatic temperature intelligent control device includes an upper temperature control seat 23 and a lower temperature control seat 25, the inner walls of the upper temperature control seat 23 and the lower temperature control seat 25 are provided with an induction coil 24, and the upper temperature control seat 23 is fixed on the upper mold. The lower end surface of the seat 3 surrounds the upper forging die 4 and is higher than the lower end surface of the upper forging die 4. The lower temperature control seat 25 is fixed on the upper end surface of the lower die seat 9 and is surrounded by the lower forging die 6 and is higher than the upper end surface of the lower forging die 6. , the diameter of the upper temperature control seat 23 is smaller than the diameter of the lower temperature control seat 25. When the mold is closed, the upper temperature control seat 23 and the lower temperature control seat 25 are engaged with each other. When the mold is opened, the upper and lower parts are opened, which can accurately control the forging temperature and overcome aluminum The narrow forgeable temperature range of the alloy material and the defects such as cracking, coarse grain and unevenness ensure the quality of the forged aluminum alloy control arm.

Claims (10)

1. A forging die for an aluminum alloy automobile control arm comprises an upper die holder and a lower die holder, wherein the upper die holder and the lower die holder are connected through a guide pillar; the lower end face of the upper die base is provided with a downward upper forging groove, a forging upper die is arranged in the upper forging groove, an upper insert is arranged between the forging upper die and the upper forging groove, the upper insert is fixedly connected with the upper die base through an insert screw, and the lower surface of the forging upper die is provided with a downward upper die cavity;

the upper end face of the lower die holder is provided with an upward lower forging groove, a forging lower die is arranged in the lower forging groove, a lower insert is arranged between the forging lower die and the lower forging groove, the lower insert is fixedly connected with the lower die holder through an insert screw, an upward lower die cavity is formed in the upper surface of the forging lower die, and the upper die cavity and the lower die cavity are matched with each other to jointly define a die cavity for forming a control arm.

2. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the die cavities comprise a pre-forging die cavity and a finish forging die cavity; one end of the cavity is provided with a first round boss, and the other end of the cavity is provided with a second round boss and an upward groove; a first long boss and a second long boss are arranged between the first round boss and the second round boss, and a transition groove is arranged between the first long boss and the second long boss; a convex groove facing the cavity is also arranged on one side of the cavity; the groove in the final forging cavity is also provided with a bulge.

3. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the upper insert is a trapezoidal insert with a small upper part and a large lower part, and an included angle between a contact surface of the trapezoidal insert and the forging upper die and a vertical direction is 5-10 degrees.

4. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the lower insert is a trapezoidal insert with a large upper part and a small lower part, and an included angle between a contact surface of the trapezoidal insert and the forging lower die and a vertical direction is 5-10 degrees.

5. The aluminum alloy automobile control arm forging die as recited in claim 2, wherein the round angle of the periphery of the pre-forging cavity is larger than that of the periphery of the finish forging cavity.

6. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the upper forging die is provided with positioning bosses at two ends of a diagonal line, and the lower forging die is provided with positioning grooves at two ends of the diagonal line, wherein the positioning grooves are matched with the positioning bosses.

7. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the upper die holder and the lower die holder are further provided with hoisting holes, and the left end and the right end of the upper die holder and the lower die holder are provided with U-shaped mounting grooves.

8. The aluminum alloy automobile control arm forging die as recited in claim 1, wherein the forging upper die, the forging lower die, the upper insert and the lower insert are made of 5CrNiMo materials through a heat treatment process.

9. The aluminum alloy automobile control arm forging die as claimed in claim 1, wherein an automatic intelligent temperature control device is further arranged on the forging die and used for accurately controlling the forging temperature, and the temperature control accuracy is +/-1 ℃.

10. The aluminum alloy automobile control arm forging die as recited in claim 9, wherein the automatic temperature intelligent control device comprises an upper temperature control seat and a lower temperature control seat, induction coils are arranged on inner walls of the upper temperature control seat and the lower temperature control seat, the upper temperature control seat is fixed on the lower end face of the upper die base, the forging upper die surrounds the lower end face of the forging upper die, the lower temperature control seat is fixed on the upper end face of the lower die base, the forging lower die surrounds the upper end face of the forging lower die and is higher than the upper end face of the forging lower die, the diameter of the upper temperature control seat is smaller than that of the lower temperature control seat, and the upper temperature control seat and the lower temperature control seat are mutually clamped.

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