CN115722553A - A production and preparation method of 7-series aluminum alloy profiles for automobile lightweight - Google Patents

Abstract

The invention relates to the technical field of section bar production, in particular to a production and preparation method of a 7-series aluminum alloy section bar for light weight of an automobile, which comprises the following steps: the method comprises the following steps: the high-strength 7-series aluminum alloy extruded profile die is optimally designed, the throughput of the die is improved, and the unit die cost is reduced; step two: isothermal extrusion is realized by gradient heating of the cast ingot, so that the production efficiency is improved; step three: an on-line quenching process and device; step four: the on-line shaping device ensures the straightness, flatness and verticality of the section bar and improves the yield of products. Has the advantages that: according to the invention, the low-temperature airflow is introduced to the contact pipe through the quick cooling pipe, so that after the cooling liquid in the treatment box enters the cooling box through the discharge groove, the effective cooling treatment of the low-temperature airflow can be obtained, and then the cooling liquid returns to the cooling cavity through the return pipe, and the cooling liquid can be efficiently recycled in relatively long-time processing.

Description

A production and preparation method of 7-series aluminum alloy profiles for automobile lightweight

technical field

The invention relates to the technical field of profile production, in particular to a method for producing and preparing 7-series aluminum alloy profiles for lightweight vehicles.

Background technique

With the increasingly high requirements for lightweight, aluminum alloy profiles are developing in the direction of thinner walls, flatter widths, high precision dimensions, complex shapes, and high performance enhancements. They are more and more widely used in new energy vehicles. Used as battery box, anti-collision beam, seat bracket, etc.;

Existing, the heating, quenching and cooling in the production process of general aluminum profiles generally adopt liquid immersion type. This cooling method does not cool the aluminum profiles uniformly, so that the stiffness distribution of the surface of the aluminum profiles is uneven, and the whole needs to wait for a longer period of time. Over a long period of time, the heat dissipation rate is slower and the overall efficiency is lower.

Contents of the invention

The purpose of the present invention is to solve the problem of low efficiency and poor effect in the prior art, and propose a production and preparation method of 7 series aluminum alloy profiles for automobile lightweight.

In order to achieve the above object, the present invention adopts the following technical scheme: a production and preparation method of 7-series aluminum alloy profiles for lightweight automobiles, comprising the following steps:

Step 1: Optimize the design of high-strength 7-series aluminum alloy extrusion profile molds, increase the throughput of the mold, and reduce the unit mold cost;

Step 2: Gradient heating of the ingot to achieve isothermal extrusion and improve production efficiency;

Step 3: On-line quenching process and device;

Step 4: Online shaping device to ensure the straightness, flatness and verticality of the profile, and improve the product yield;

The equipment used in the production and preparation method of the above-mentioned 7-series aluminum alloy profiles for lightweight automobiles includes a treatment box, a cover plate is installed on the upper end of the treatment box, and a cooling chamber is opened at the bottom of the treatment box. A water pump is installed inside, a water supply chamber is provided on the side wall of the treatment box, and the outlet pipe of the water pump is connected to the water supply chamber, and multiple groups of nozzles are installed on the side wall of the water supply chamber, and a water supply chamber is provided on the side wall of the treatment box. A discharge slot, the inner wall of the processing box is fixed with a rotary motor, the output shaft of the rotary motor is fixed with a clamping platform, the inside of the clamping platform is provided with a clamping mechanism, and the inner wall of the processing box is rotatably connected with a rotary frame, the inner wall of the revolving frame is fixed with a winding motor, the output shaft of the winding motor is fixed with a twisting platform, the inside of the twisting platform is provided with a tightening mechanism, and the clamping mechanism and the tightening mechanism are connected together There is a pair of carrying plates, the side walls of the carrying plates are provided with a plurality of through grooves, and the side walls of the carrying plates are fixed with a limiting plate.

In the above-mentioned processing equipment, the clamping mechanism includes a connecting block, screw rods are fixed on both sides of the connecting block, and a clamping motor and a counterweight are symmetrically fixed on the side wall of the clamping table, one of which The screw rod is fixed to the output shaft of the clamping motor, the other screw rod is connected to the end of the counterweight in rotation, and the side walls of the two screw rods are threaded and connected with sliders, and the sliders Fixed with the corresponding mounting plate.

In the above-mentioned processing equipment, a rolling groove is provided inside the clamping table, and a chute is opened through the side wall of the rolling groove, and a rotating rod is connected to the side wall of the slider in rotation, and the rotating rod runs through The chute is also fixed with a gear, and the inner wall of the rolling groove is fixed with a rack, and the rack is meshed with the gear.

In the above processing equipment, the twisting mechanism includes a winding shaft fixed to the output shaft of the winding motor, a pair of connecting plates are slidably connected to the inner wall of the twisting table, and hanging lugs are fixed on the side walls of the connecting plates. The hanging lug and the winding shaft are jointly connected with a chain, and the side wall of the twisting platform is fixed with a guide rod passing through the connecting plate, and the connecting plate is fixed with the side wall of the carrying plate.

In the above-mentioned processing equipment, the side wall of the treatment box is fixed with a recovery box, the inner wall of the recovery box is fixed with an air pump, the air inlet of the air pump is connected with a suction pipe, and the suction pipe is connected to the inside of the cover plate. Through, the bottom of the cover plate is installed with a plurality of suction heads.

In the above-mentioned processing equipment, a cooling box is fixed on the side wall of the treatment box, the discharge groove is connected to the inside of the cooling box, and a return pipe connected to the cooling chamber is inserted in the side wall of the cooling box, so An airflow box is fixed on the side wall of the recovery box, and a plurality of cooling fins are inserted through the side wall of the recovery box.

In the above-mentioned processing equipment, the outer wall of the treatment box is fixed with a vortex tube, the cold flow tube of the vortex tube is connected with a quick cooling tube and a flow tube, and the side wall of the cooling box is inserted with a plurality of The contact pipe connected to the cold pipe, the airflow pipe is connected to the inside of the airflow box, the side wall of the airflow box is penetrated with a discharge port, and the inner diameter of the airflow pipe is smaller than the inner diameter of the quick cooling pipe.

Compared with the prior art, the present invention has the advantages of:

1. In the present invention, the holding motor works, so that the two carrying plates can clamp the profile in the middle, and both sides move at the same time, which can realize fast equal clamping, thereby improving the clamping effect and efficiency;

2. In the present invention, the direct lateral movement of the slider is limited by the teeth, thus ensuring the stability of the position of the slider, thereby improving the clamping effect, and reducing the damage to the thread on the surface of the screw rod after locking, so that the service life of the screw rod be promoted;

3. In the present invention, the two connecting plates have a tendency to approach each other under the tension, so that the two carrying plates are further stressed to improve the clamping effect, and the two sides act separately, which can face the processing of longer profiles;

4. In the present invention, the cooling liquid is passed into the water supply chamber through the water pump, and then the cooling liquid is sprayed from the nozzle, and the high-efficiency quenching treatment of the rotating profile is realized by covering multiple surfaces, and the rotary processing can improve the uniformity and improve the quenching process. quality;

5. In the present invention, the low-temperature airflow is ventilated to the contact pipe through the quick-cooling pipe, so that the cooling liquid inside the processing box enters the cooling box through the discharge tank, and the effective cooling treatment of the low-temperature airflow can be obtained, thereby returning to the cooling chamber through the return pipe. In the cavity, the coolant can be efficiently recycled in relatively long processing.

Description of drawings

Fig. 1 is the structural representation of the production preparation method of a kind of automobile light weight that proposes with 7 series aluminum alloy profiles in the present invention;

Fig. 2 is a semi-sectional view of a production and preparation method of a 7-series aluminum alloy profile for automobile lightweight proposed by the present invention;

Fig. 3 is a top sectional view of a production and preparation method of a 7-series aluminum alloy profile for automobile lightweight proposed by the present invention;

Fig. 4 is a schematic structural view of the clamping table part of the production and preparation method of a 7-series aluminum alloy section bar for automobile lightweight proposed by the present invention;

Fig. 5 is a structural schematic diagram of the stranding table part of a method for producing and preparing 7-series aluminum alloy profiles for lightweight automobiles proposed by the present invention.

In the figure: 1 treatment box, 2 cover plate, 3 cooling chamber, 4 water pump, 5 water supply chamber, 6 nozzle, 7 discharge tank, 8 rotary motor, 9 clamping table, 10 rotary frame, 11 stranding table, 12 carrying plate , 13 through tank, 14 recovery box, 15 air pump, 16 suction pipe, 17 suction head, 18 cooling box, 19 airflow box, 20 vortex tube, 21 speed cooling pipe, 22 airflow pipe, 23 contact pipe, 24 outlet, 25 heat sink, 26 clamping motor, 27 counterweight, 28 screw rod, 29 connecting block, 30 slider, 31 chute, 32 rolling groove, 33 rotating rod, 34 gear, 35 rack, 36 winding motor, 37 Winding shaft, 38 connecting plate, 39 hanging lug, 40 chain, 41 guide rod, 42 limit plate, 43 return pipe.

Detailed ways

The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

Example

Referring to Figures 1-5, a method for producing and preparing 7-series aluminum alloy profiles for lightweight vehicles comprises the following steps:

Step 1: Optimize the design of the high-strength 7-series aluminum alloy extrusion profile mold, increase the throughput of the mold, and reduce the unit mold cost; the mold throughput is increased from the original 2 tons to 4 tons, and the unit mold cost is reduced by 50%;

Step 2: Gradient heating of the ingot to achieve isothermal extrusion and improve production efficiency; the discharge temperature and profile structure are uniform and stable;

Step 3: On-line quenching process and device

Step 4: The online shaping device ensures the straightness, flatness and verticality of the profile, and improves the product yield; the output temperature and profile structure are uniform and stable, and the production efficiency is high;

The equipment used in the production and preparation method of the above-mentioned 7-series aluminum alloy profiles for lightweight automobiles includes a treatment box 1, a cover plate 2 is installed on the upper end of the treatment box 1, and a cooling chamber 3 is opened at the bottom of the treatment box 1, and the cooling chamber 3 A water pump 4 is installed inside, and the side wall of the treatment box 1 is provided with a water supply chamber 5. Discharge groove 7, the inwall of treatment box 1 is fixed with rotary motor 8, and the output shaft of rotary motor 8 is fixed with clamping platform 9, and the inside of clamping platform 9 is provided with clamping mechanism, and the inwall of processing box 1 is rotatably connected with rotary frame 10. The inner wall of the revolving frame 10 is fixed with a winding motor 36, and the output shaft of the winding motor 36 is fixed with a twisting table 11. The inside of the twisting table 11 is provided with a tightening mechanism, and the clamping mechanism and the tightening mechanism are jointly connected with a pair of carrying The plate 12 and the side wall of the mounting plate 12 are provided with a plurality of through grooves 13 , and the side wall of the mounting plate 12 is fixed with a limiting plate 42 .

Clamping mechanism comprises connecting block 29, and the both sides of connecting block 29 are all fixed with screw mandrel 28, and the side wall of clamping table 9 is symmetrically fixed with clamping motor 26 and counterweight 27, wherein a screw mandrel 28 and clamping motor The output shaft of 26 is fixed, and another screw mandrel 28 is rotationally connected with counterweight 27 ends, and the side walls of two screw mandrels 28 all pass through and are threadedly connected with slide block 30, and slide block 30 is fixed with corresponding carrying plate 12.

The inside of the clamping table 9 is provided with a rolling groove 32, and the side wall of the rolling groove 32 is penetrated with a chute 31, and the side wall of the slider 30 is rotatably connected with a rotating rod 33, and the rotating rod 33 runs through the chute 31 and is fixed with a gear 34. , the inner wall of the rolling groove 32 is fixed with a rack 35, the rack 35 is meshed with the gear 34, and the meshing of the teeth is used to limit the lateral movement, improve the clamping stability, and reduce the impact of the clamping force on the screw thread of the screw mandrel 28. damage.

The twisting mechanism includes a winding shaft 37 fixed to the output shaft of the winding motor 36. A pair of connecting plates 38 are slidably connected to the inner wall of the twisting platform 11. The side walls of the connecting plates 38 are fixed with hanging lugs 39. The hanging lugs 39 are in common with the winding shaft 37. A chain 40 is connected, and the side wall of the twisting table 11 is fixed with a guide rod 41 that runs through the connecting plate 38. The connecting plate 38 is fixed to the side wall of the mounting plate 12, and the winding shaft 37 is used to retract the chain 40, thereby improving the stability of the profile. clamping effect.

The side wall of the processing box 1 is fixed with a recovery box 14, and the inwall of the recovery box 14 is fixed with an air pump 15, and the air inlet of the air pump 15 is connected with a suction pipe 16, and the suction pipe 16 is connected with the inside of the cover plate 2, and the bottom of the cover plate 2 A plurality of air pumping heads 17 are installed, and the gasified cooling liquid is discharged by using the air pump 15, so as to prevent the cooling liquid from being liquefied and backflowing to affect the quenching quality.

The side wall of the treatment box 1 is fixed with a cooling box 18, the discharge groove 7 is connected with the inside of the cooling box 18, the side wall of the cooling box 18 is inserted with a return pipe 43 connected with the cooling chamber 3, and the side wall of the recovery box 14 is fixed. There is an air flow box 19, and a plurality of cooling fins 25 are inserted through the side wall of the recovery box 14, and the cooling fins 25 are used for heat conduction, and then the heat is taken away by the air flow to realize continuous cooling.

The outer wall of the processing box 1 is fixed with a vortex tube 20, and the cold air flow tube of the vortex tube 20 is connected with a quick cooling tube 21 and an air flow tube 22, and the side wall of the cooling box 18 is inserted with a plurality of contacts connected with the quick cooling tube 21. Pipe 23, airflow pipe 22 are connected with airflow box 19 inside, and the side wall of airflow box 19 runs through and is provided with outlet 24, and airflow pipe 22 inner diameter is less than quick cooling pipe 21 inner diameter, after vortex tube 20 is connected with external air compressor, can The cold air flow is supplied, so that the rapid cooling pipe 21 is transferred by a large amount of cold air flow for rapid cooling, so that the cooling liquid can quickly enter the circulation, and a small part of the cold air flow is supplied to the air flow pipe 22, so that the vaporized The coolant performs a relatively slow continuous heat dissipation process;

In the present invention, during actual processing, the profile to be quenched is clamped and placed in the middle of the two carrying plates 12, and then the clamping motor 26 is started to drive the screw rod 28 to rotate, and the rotation of the two screw rods 28 will simultaneously drive two The two sliders 30 move, and because the thread turns in the opposite direction, the two sliders 30 will move towards each other, so that the two limit plates 42 will approach, and then the profile handling parts will be removed before the profile is not clamped, and then clamped The motor 26 continues to work, so that the two carrying plates 12 can clamp the profile in the middle, and both sides move at the same time, which can realize fast equal clamping, thereby improving the clamping effect and efficiency;

During the movement of the slider 30, the rotating rod 33 moves thereupon, and the gear 34 on the rotating rod 33 will also move, so that the gear 34 rolls forward along the rack 35, and when the subsequent clamping ends, the rack 35 pairs The gear 34 acts as a movement limiter, so that the direct lateral movement of the slider 30 is limited by the teeth, thus ensuring the stability of the position of the slider 30, thereby improving the clamping effect, and reducing the damage to the thread on the surface of the screw rod 28 after locking , so that the service life of the screw rod 28 is improved;

Then start the winding motor 36, so that it drives the winding shaft 37 to rotate, and the effective winding chain 40 is effectively rotated by the winding shaft 37, so that the two connecting plates 38 are subject to tension and tend to approach each other, and then the two carrying plates 12 are further stressed. So as to improve the clamping effect, and the two sides act separately, which can deal with the processing of longer profiles;

After the clamping is completed, the rotary motor 8 can be started to drive the clamped profile to rotate through the rotary motor 8, and the water pump 4 can be started to pass the cooling liquid into the water supply chamber 5 through the water pump 4, so that the cooling liquid is sprayed from the nozzle 6, Furthermore, the high-efficiency quenching treatment of the rotating profile can be realized through multi-face covering, and the rotating processing can improve the uniformity and improve the quenching quality;

Simultaneously start the air pump 15, and the air pump 15 extracts the upper airflow of the treatment box 1 through the air extraction pipe 16 and the air extraction head 17, so that the vaporized cooling liquid can be discharged quickly, thereby avoiding falling back and reducing the quenching quality, while the vaporized cooling liquid is into the recovery box 14, and then condensed and collected, thereby recycling;

And the vortex tube 20 will also be started, and then the low-temperature airflow will be ventilated to the contact pipe 23 through the quick-cooling pipe 21, so that after the cooling liquid in the processing box 1 enters the cooling box 18 through the discharge groove 7, the effective cooling process of the low-temperature airflow can be obtained, Therefore, the return pipe 43 is returned to the cooling cavity 3, so that the cooling liquid can be efficiently recycled in relatively long processing;

And a small part of the low-temperature airflow is injected into the airflow box 19 through the airflow pipe 22, the flow velocity of the airflow inside the airflow box 19 is improved, and the low-temperature airflow is used, so that the cooling fins 25 can better export the heat inside the recovery box 14, and then make recovery The cooling liquid recovered inside the box 14 is subjected to continuous cooling treatment, so as to facilitate subsequent better recycling.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (7)

1. A production and preparation method of a 7-series aluminum alloy profile for automobile light weight is characterized by comprising the following steps:

the method comprises the following steps: the high-strength 7-series aluminum alloy extruded profile die is optimally designed, the throughput of the die is improved, and the unit die cost is reduced;

step two: isothermal extrusion is realized by gradient heating of the cast ingot, so that the production efficiency is improved;

step three: an on-line quenching process and device;

step four: the online shaping device ensures the straightness, flatness and verticality of the section and improves the yield of products;

the equipment used in the production and preparation method of the 7-series aluminum alloy section for the light weight of the automobile comprises a treatment box (1), the upper end of the treatment box (1) is provided with a cover plate (2), the lower part of the treatment box (1) is provided with a cooling cavity (3), a water pump (4) is arranged in the cooling cavity (3), a water supply cavity (5) is arranged on the side wall of the treatment box (1), the water outlet pipe of the water pump (4) is communicated with a water supply cavity (5), a plurality of groups of spray heads (6) are arranged on the side wall of the water supply cavity (5), the side wall of the treatment box (1) is provided with a discharge groove (7), a rotary motor (8) is fixed on the inner wall of the treatment box (1), a clamping table (9) is fixed on an output shaft of the rotary motor (8), a clamping mechanism is arranged in the clamping table (9), the inner wall of the processing box (1) is rotationally connected with a rotating frame (10), a winding motor (36) is fixed on the inner wall of the rotary frame (10), an output shaft of the winding motor (36) is fixed with a twisting table (11), a twisting mechanism is arranged in the twisting table (11), the clamping mechanism and the twisting mechanism are connected with a pair of carrying plates (12) together, the side wall of the carrying plate (12) is provided with a plurality of through grooves (13), a limiting plate (42) is fixed on the side wall of the carrying plate (12).

2. The production method of the 7-series aluminum alloy profile for the light weight of the automobile according to claim 1, wherein the clamping mechanism comprises a connecting block (29), lead screws (28) are fixed on both sides of the connecting block (29), a clamping motor (26) and a balancing weight (27) are symmetrically fixed on the side wall of the clamping table (9), one of the lead screws (28) is fixed with an output shaft of the clamping motor (26), the other lead screw (28) is rotatably connected with the end of the balancing weight (27), a sliding block (30) is connected to the side wall of each of the two lead screws (28) through a thread, and the sliding block (30) is fixed with the corresponding carrying plate (12).

3. The production method of the 7-series aluminum alloy section bar for the automobile weight reduction according to claim 2, wherein a rolling groove (32) is formed in the clamping table (9), a sliding groove (31) is formed in a side wall of the rolling groove (32) in a penetrating manner, a rotating rod (33) is rotatably connected to a side wall of the sliding block (30), a gear (34) is fixed to the rotating rod (33) in a penetrating manner through the sliding groove (31), a rack (35) is fixed to an inner wall of the rolling groove (32), and the rack (35) is meshed with the gear (34).

4. The production method of the 7-series aluminum alloy profile for the light weight of the automobile according to claim 1, wherein the tightening mechanism comprises a winding shaft (37) fixed on an output shaft of a winding motor (36), a pair of connecting plates (38) is connected to the inner wall of the twisting table (11) in a sliding manner, a hanging lug (39) is fixed on the side wall of each connecting plate (38), a locking chain (40) is connected to each hanging lug (39) and the winding shaft (37) together, a guide rod (41) penetrating through each connecting plate (38) is fixed on the side wall of the twisting table (11), and the connecting plates (38) are fixed on the side wall of the carrying plate (12).

5. The production method of the 7-series aluminum alloy profile for the light weight of the automobile according to claim 1, characterized in that a recycling box (14) is fixed on the side wall of the processing box (1), an air pump (15) is fixed on the inner wall of the recycling box (14), an air inlet of the air pump (15) is connected with an air suction pipe (16), the air suction pipe (16) is communicated with the inside of the cover plate (2), and a plurality of air suction heads (17) are installed at the bottom of the cover plate (2).

6. The production method of the 7-series aluminum alloy section for the automobile weight reduction according to claim 5, wherein a cooling box (18) is fixed to a side wall of the treatment box (1), the discharge groove (7) is communicated with the interior of the cooling box (18), a return pipe (43) communicated with the cooling cavity (3) is inserted into the side wall of the cooling box (18), an airflow box (19) is fixed to a side wall of the recovery box (14), and a plurality of cooling fins (25) are inserted through the side wall of the recovery box (14).

7. The production method of the 7-series aluminum alloy profile for the light weight of the automobile according to claim 6, characterized in that a vortex tube (20) is fixed on the outer wall of the treatment box (1), a cold air flow tube of the vortex tube (20) is connected with a quick cooling tube (21) and an air flow tube (22), a plurality of contact tubes (23) communicated with the quick cooling tube (21) are inserted through the side wall of the cooling box (18), the air flow tube (22) is communicated with the inside of the air flow box (19), a discharge port (24) is formed through the side wall of the air flow box (19), and the inner diameter of the air flow tube (22) is smaller than the inner diameter of the quick cooling tube (21).

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