CN111229947A

CN111229947A - Heating system for hot forming high-strength steel plate production line

Info

Publication number: CN111229947A
Application number: CN202010133563.3A
Authority: CN
Inventors: 翟述基
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-06-05

Abstract

The invention discloses a heating system for a hot-forming high-strength steel plate production line, which comprises a feeding system, a heating furnace and a discharging system which are sequentially arranged; the heating furnace comprises a furnace body and a furnace supporting device arranged in the furnace body; the feeding system comprises a horizontal feeding mechanism, a cylinder linkage device and a material supporting fork, wherein the cylinder linkage device is connected to the horizontal feeding mechanism, the material supporting fork is hinged to the cylinder linkage device, the material supporting fork can rotate in a vertical plane by a certain angle under the driving of the cylinder linkage device, and the material supporting fork is used for supporting a sheet material to be fed into the heating furnace and placed on a piece supporting device in the furnace and transferring the sheet material on the piece supporting device in the furnace; the discharging system comprises a material taking fork, a discharging supporting device and a horizontal discharging mechanism, the discharging supporting device is connected to the horizontal discharging mechanism, the discharging fork is connected to the discharging supporting device, the material taking fork can rotate in a vertical plane for a certain angle under the driving of the discharging supporting device, and the discharging fork is used for entering a heating furnace to support plates on the supporting device in the heating furnace.

Description

Heating system for hot forming high-strength steel plate production line

Technical Field

The invention relates to a heating system for a hot forming high-strength steel plate production line, and belongs to the technical field of hot forming of high-strength steel plates.

Background

The hot-formed parts of the high-strength steel plates of the automobiles are widely used in the field of passenger automobiles, which is the best way for lightening the weight of the automobiles at present, but are hardly used in commercial vehicles at home and abroad at present. The commercial vehicle uses the hot-formed high-strength plate part, the weight reduction effect of the commercial vehicle is more obvious (because the commercial vehicle uses more steel plates with the thickness of more than 2 mm), and the commercial benefit and the social benefit are huge. Taking a dumper as an example, the weight of the dumper is reduced to below 500 kg (the dumper is completely reliable after being tried for one year) by using a hot-formed high-strength steel plate and optimizing the structure, so that the dumper has huge comprehensive benefits. But why is no one currently developing this technology?

The commercial vehicle has a plurality of large parts, and a series of technical problems are solved for developing a large heating furnace and automatically taking and delivering the parts.

When the processing sheet is a narrow piece, how to improve the processing efficiency and accelerate the production beat is also one of the problems to be solved urgently.

The series of hot forming high-strength steel plate production line products developed for commercial vehicles are used for filling the blank, improving the vehicle-mounted efficiency and reducing the oil consumption.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a heating system for a hot forming high-strength steel plate production line, a plurality of plates can be accommodated in a heating furnace according to the production beat, the feeding and the taking are convenient and quick, and the production efficiency is greatly improved. The invention can process the maximum part size of 3.5 m × 1.6 m × 0.25 m, the thickness of the plate material is less than 20 mm, and the weight of the part is less than 500 kg.

The purpose of the invention is realized by the following technical scheme:

a heating system for a hot forming high-strength steel plate production line comprises a feeding system, a heating furnace and a discharging system which are sequentially arranged; the heating furnace comprises a furnace body and a furnace supporting device arranged in the furnace body; the feeding system comprises a horizontal feeding mechanism, a cylinder linkage device and a material supporting fork, wherein the cylinder linkage device is connected to the horizontal feeding mechanism, the material supporting fork is hinged to the cylinder linkage device, the material supporting fork can rotate in a vertical plane by a certain angle under the driving of the cylinder linkage device, and the material supporting fork is used for supporting a sheet material to be fed into the heating furnace and placed on a piece supporting device in the furnace and transferring the sheet material on the piece supporting device in the furnace; the discharging system comprises a material taking fork, a discharging supporting device and a horizontal discharging mechanism, the discharging supporting device is connected to the horizontal discharging mechanism, the discharging fork is connected to the discharging supporting device, the material taking fork can rotate in a vertical plane for a certain angle under the driving of the discharging supporting device, and the discharging fork is used for entering a heating furnace to support plates on the supporting device in the heating furnace.

Furthermore, the heating furnace also comprises a front furnace door and a rear furnace door, the front furnace door and the rear furnace door are respectively controlled to open and close by a front furnace door opening and closing mechanism and a rear furnace door opening and closing mechanism, the front furnace door opening and closing mechanism and the rear furnace door opening and closing mechanism are respectively arranged on the front door-shaped frame and the rear door-shaped frame, and the front furnace door and the rear furnace door are sealed with the furnace body through a furnace door sealing air cylinder 34.

Furthermore, the furnace door opening and closing mechanism comprises a furnace door opening and closing servo motor, a furnace door chain wheel chain pair and a furnace door guide rail, the furnace door opening and closing servo motor is fixed on a door-shaped frame cross beam, the furnace door opening and closing servo motor is connected with a furnace door frame through the furnace door chain wheel chain pair, the furnace door is connected with the furnace door guide rail through the furnace door frame, and the furnace door guide rail is vertically fixed on a door-shaped frame upright post.

Furthermore, the horizontal feeding mechanism of the feeding system comprises a feeding base, a feeding servo motor, a feeding sliding table, a guide rail and a feeding gear rack pair; the guide rail is fixed on the feeding base, the feeding sliding table is connected to the guide rail in a sliding mode, and the feeding servo motor is connected with the feeding sliding table through a feeding gear rack pair; and the cylinder linkage device is arranged on the feeding sliding table in parallel.

Further, the air cylinder linkage device of the feeding system comprises a driving air cylinder, a lower connecting block, a connecting rod and an upper connecting block; drive actuating cylinder horizontal fixation on pay-off slip table, cylinder hub connection lower connecting block, the connecting rod both ends are articulated in upper and lower connecting block respectively, go up the connecting block and fix at holding in the palm material fork tip.

Furthermore, the horizontal discharging mechanism of the discharging system comprises a discharging sliding table, a discharging servo motor, a discharging gear rack pair, a discharging guide rail and a discharging base; the discharging guide rail is fixed on the discharging base, the discharging sliding table is connected to the discharging guide rail in a sliding mode, and the discharging servo motor is connected with the discharging sliding table through a discharging gear rack pair; the discharging supporting device is arranged on the discharging sliding table in parallel.

Furthermore, ejection of compact of discharging system holds up device is including driving actuating cylinder, lower connecting block, connecting rod, upper connecting block, drives actuating cylinder level and fixes on ejection of compact slip table, and connecting block under the cylinder hub connection, connecting rod both ends are articulated in upper and lower connecting block respectively, and upper connecting block is fixed and is being got the material fork tip.

The hot forming high-strength steel plate production line provided by the invention is pioneered at home and abroad, and has the following advantages:

the maximum size of the part which can be processed by the production line is 3.5 meters multiplied by 1.6 meters multiplied by 0.25 meter, the thickness of the plate is less than 20 millimeters, the tensile strength of the part can reach more than 1200GP, the hardness HRC40 is more than, the martensite structure reaches more than 97 percent, and the weight of the part is less than 500 kilograms.

In the whole processing process of the invention, the sheet material 10 is transversely transported (namely the sheet material is transported in the direction of narrow edges), so the whole longitudinal dimension (the longitudinal direction is the processing and transporting direction of the workpiece) of the production line is small, the integration level is high, and the space is saved.

According to the invention, the pneumatic devices are respectively arranged in the feeding system and the discharging system to drive the feeding fork and the material taking fork, so that when the plate is a narrow material, a plurality of plates can be accommodated in the furnace, the production takt is improved, and the production efficiency is further improved.

The production line is full-automatic production, can provide light parts for commercial vehicles, can reduce the thickness of common steel plate parts with the thickness of more than 3mm by 40-60 percent and reduce the weight by more than 40 percent, and does not improve the price of the parts.

Drawings

FIG. 1 is a schematic structural view of a hot forming and stamping production line for high-strength steel plates

FIG. 2 is a schematic view of the front view of the feeding system of the present invention

FIG. 3 is a left side view of the feeding system of the present invention

FIG. 4 is a schematic view of the front view of the heating furnace system of the present invention

FIG. 5 is a left side view of the heating furnace system of the present invention

FIG. 6 is a schematic view of the front view of the discharging system of the present invention

FIG. 7 is a schematic diagram of a right-view structure of the discharging system of the present invention

FIG. 8 is a schematic view of a multi-workpiece heating feeding and discharging process of the present invention

In the figure:

1-a feeding system; 2-a feeding system; 3, heating the furnace; 4-a discharge system; 5-a transit system; 6-high-speed press; 7-water cooling the mold; 8-a pickup system; 10-plate material; 21-a feeding servo motor; 22-cylinder linkage; 23-a feed ramp; 24-a material supporting fork; 25-a feeding base; 26-a guide rail; 27-feeding rack and pinion; 28-furnace body; 29-furnace cover; 30-furnace door; 31-oven door guide rails; 32-a furnace door opening and closing servo motor; 33-sprocket chain pair; 34-a furnace door closing cylinder; 35-a supporting device in the furnace; 36-material taking servo motor in the furnace; 37-discharge gear rack pair; 38-discharge guide rail; 39-a discharge base; 40-a material taking fork; 41-a discharge sliding table; 42-discharging and supporting device.

Detailed Description

The technical scheme of the invention is described in the following with reference to the accompanying drawings

As shown in fig. 1, a specific application embodiment of the present invention, a hot forming high strength steel plate production line, is sequentially provided with a feeding system 1, a feeding system 2, a heating furnace 3, a discharging system 4, a transfer system 5, a high speed press 6, and a pickup system 8 according to production processes, wherein a water cooling mold 7 is arranged in the high speed press 6; the feeding system 1 sends the plate 10 to the feeding system 2, the feeding system 2 sends the plate 10 into the heating furnace 3, after the plate 10 is heated, the discharging system 4 moves the heated plate 10 out of the heating furnace 3 to reach a designated position, the transfer system 5 picks up the plate 10 and transfers the plate to the water-cooling mold 7 on the high-speed press 6, after the transfer system 5 exits, the high-speed press 6 is closed and pressed, after cooling and pressure maintaining, an upper sliding block of the high-speed press 6 is lifted, the part taking system 8 enters the water-cooling mold 7, and pressed parts are taken out and placed at the designated position.

The invention provides a heating system for a hot-forming high-strength steel plate production line, which comprises a feeding system 2, a heating furnace 3 and a discharging system 4 which are sequentially arranged; the heating furnace 3 comprises a furnace body 28, a furnace door 30 and a furnace inner supporting piece device 35; the front and the rear furnace doors 30 are controlled by a front and a rear furnace door opening and closing mechanism to open and close respectively, the furnace doors 30 are hermetically connected with the furnace body 28 through a furnace door closing cylinder 34, and a furnace inner supporting device 35 is arranged in the furnace body 28; the feeding system comprises a horizontal feeding mechanism, an air cylinder linkage device 22 and a material supporting fork 24, wherein the air cylinder linkage device 22 is connected to the horizontal feeding mechanism, the horizontal feeding mechanism drives the air cylinder linkage device 22 to move horizontally, the material supporting fork 24 is hinged to the air cylinder linkage device 22, the material supporting fork 24 can rotate for a certain angle in a vertical plane under the driving of the air cylinder linkage device, and the material supporting fork 24 is used for supporting a plate material 10 to be fed into the heating furnace 3, placed on a part supporting device 35 in the furnace and used for moving the plate material 10 on the part supporting device 35 in the furnace; the discharging system 4 comprises a material taking fork 40, a discharging supporting device 42 and a horizontal discharging mechanism, the discharging supporting device 42 is connected to the horizontal discharging mechanism, the horizontal discharging mechanism drives the discharging supporting device 42 to move horizontally, the discharging fork 40 is connected to the discharging supporting device 42, and the material taking fork 40 can rotate in a vertical plane by a certain angle under the driving of the discharging supporting device 42; the discharging fork 40 is used for entering the heating furnace and lifting the plate 10 on the supporting device 35 in the furnace.

As shown in fig. 2 and 3, the feeding system 2 is located below the feeding system 1, and is used for conveying the sheet metal 10 conveyed by the feeding system into the heating furnace 3. The feeding system 2 comprises a feeding base 25, a feeding servo motor 21, a feeding sliding table 23, a guide rail 26, a feeding gear rack pair 27, an air cylinder linkage device 22 and a material supporting fork 24; the guide rail 26 is fixed on the feeding base 25, the feeding sliding table 23 is connected on the guide rail 26 in a sliding manner, and the feeding servo motor 21 is connected with the feeding sliding table 23 through a feeding gear rack pair 27 and drives the feeding sliding table 23 to move along the guide rail 26; a pair of cylinder linkage devices 22 are arranged on a feeding sliding table 23 in parallel, a material supporting fork 24 is hinged on the cylinder linkage devices, and the material supporting fork 24 can rotate for a certain angle in a vertical plane under the driving of the cylinder linkage devices.

The cylinder linkage device 22 comprises a driving cylinder, a lower connecting block, a connecting rod and an upper connecting block, the driving cylinder is horizontally fixed on the feeding sliding table 23, the cylinder is connected with the lower connecting block through a shaft, two ends of the connecting rod are hinged to the upper connecting block and the lower connecting block respectively, and the upper connecting block is fixed at the end part of the material supporting fork 24.

When the sucking disc 11 of the feeding system releases the plate 10 onto the material supporting fork 24, the cylinder linkage device drives the material supporting fork 24 to rotate anticlockwise for 3 degrees, so that the material supporting fork tilts upwards, the feeding servo motor 21 is started, the feeding sliding table 23 is driven to move along the guide rail through the gear rack pair 27, and the plate 10 is sent into the heating furnace 3 through the material supporting fork 25; then the cylinder linkage drives the material supporting fork to rotate clockwise, the material supporting fork returns to the original horizontal position, the plate 10 is left on the material placing platform 35, the feeding servo motor 21 drives the feeding sliding table to return, the front furnace door is closed, and feeding is completed.

As shown in fig. 4 and 5, the heating furnace 3 includes a furnace body 28, a furnace cover 29, a furnace door 30, and a furnace holder device 35; the front and the rear furnace doors 30 are respectively controlled by a front and a rear furnace door opening and closing mechanisms which are respectively arranged on the front and the rear door-shaped frames, the furnace doors 30 are hermetically connected with the furnace body 28 through a furnace door closing cylinder 34, and the furnace inner supporting device 35 is arranged in the furnace body 28.

The oven door opening and closing mechanism comprises an oven door opening and closing servo motor 32, an oven door chain wheel chain pair 33 and an oven door guide rail 31, the oven door opening and closing servo motor 32 is fixed on a cross beam of the door-shaped frame, the oven door opening and closing servo motor 32 is connected with an oven door frame through the oven door chain wheel chain pair 33, the oven door 30 is connected with the oven door guide rail 31 through the oven door frame, and the oven door guide rail 31 is vertically fixed on an upright post of the door-shaped.

The framework of the furnace body 28 is formed by welding section steel, the bottom plate is a 40 mm steel plate, the periphery of the bottom plate is built by light refractory bricks, and the middle part of the bottom plate is filled with high-temperature-resistant heat-preservation cotton. The susceptor means 35 in the furnace is made up of a plurality of silicon carbide profiles. The framework of the furnace cover 29 is formed by welding light section steel (a self-made hot-forming high-strength steel plate), and high-temperature-resistant heat-preserving cotton is filled in the framework.

The heating furnace 3 adopts an electric heating mode, and nitrogen is filled in the furnace for protection.

As shown in fig. 6 and 7, the discharging system 4 includes a discharging sliding table 41, a discharging servo motor 36, a discharging gear rack pair 37, a discharging guide rail 38, a discharging fork 40, a discharging base 39, and a discharging support device 42, the discharging guide rail 38 is fixed on the discharging base 39, the discharging sliding table 41 is slidably connected on the discharging guide rail 38, and the discharging servo motor 36 is connected with the discharging sliding table 41 through the discharging gear rack pair 37; a pair of discharging supporting devices 42 are arranged on the discharging sliding table 41 in parallel, the material taking fork 40 is hinged on the discharging supporting devices 42, and the material taking fork 40 can rotate in a vertical plane by a certain angle under the driving of the discharging supporting devices 42.

The discharging supporting device 42 comprises a driving cylinder, a lower connecting block, a connecting rod and an upper connecting block, the driving cylinder is horizontally fixed on the discharging sliding table 41, the cylinder is connected with the lower connecting block through a shaft, two ends of the connecting rod are hinged to the upper connecting block and the lower connecting block respectively, and the upper connecting block is fixed at the end of the material taking fork 40.

When the rear oven door 30 is opened, the discharging trolley 41 moves along the discharging guide rail 38 under the driving of the discharging servo motor 36, so that the discharging fork 40 enters the heating oven. The discharging supporting device enables the material removing fork 40 to rotate clockwise for a certain angle to support the plate materials in the furnace, then the material removing fork 40 retreats to reach a preset position, and the discharging supporting device enables the material removing fork 40 to rotate anticlockwise to return to the original horizontal position.

As shown in fig. 8, when the plate is a narrow material, a plurality of plates can be accommodated in the furnace, and the working principle is as follows:

1. feeding materials into a furnace: the front furnace door is opened, and the feeding fork 24 enters the furnace to the A position, as shown in the state (1) in the figure; the feeding fork 24 rotates clockwise to the horizontal position, as shown in the state (2) in the figure, and discharging is completed;

2. pushing materials in the furnace: the feeding fork 24 advances to the B position, as shown in the state (3); the feeding fork rotates upwards anticlockwise to lift all the material sheets in the furnace, and the material sheets are in a state (4) in the figure; then dragging all the plates to move forward to the C position, as shown in the state (5); the feeding fork 24 rotates clockwise to the horizontal position, all the plates are put down, then the feeding fork 24 returns to the outside of the heating furnace, and the feeding fork is withdrawn, as shown in the state (6);

the front furnace door is closed, and the plate is heated;

3. taking materials out of the furnace: the rear oven door is opened, and the material taking fork 40 enters the oven to the C position, as shown in the state (7); the material removing fork rotates upwards anticlockwise to lift the target plate and then drags the plate to exit, and the plate is in a state (8) in the drawing.

The whole process is automatically controlled by a control system PRC, and the program can be programmed according to the requirement, the actions can be increased and decreased, and the beat and the speed can be adjusted. Each process has a reliable feedback monitoring device, and the production process is stable and reliable.

The working process of the invention is described as follows:

in the whole processing process, the sheet 10 is transversely transported (namely, the sheet is transported in the direction of the narrow edge), so that the whole longitudinal size (the longitudinal direction is the processing and transporting direction of the workpiece) of the production line is small, the integration level is high, and the space is saved.

The feeding system 1 sends the plate 10 to the feeding system 2, the feeding system 2 sends the plate 10 to the heating furnace 3, the temperature reaches 900 ℃, after the heat preservation is carried out in due time, the discharging system 4 moves the heated plate 10 out of the heating furnace 3 to reach a designated position, the transfer system 5 picks up the plate 10 and transfers the plate to the water-cooled mold 7 on the high-speed press 6, after the transfer system exits, the high-speed press 6 is closed to press, after the cooling and pressure maintaining are carried out for 7-10 seconds, the upper sliding block of the high-speed press 6 is lifted, the part taking system 8 enters the mold 7, and the pressed part is taken out and placed at the designated position.

Claims

1. A heating system for a hot forming high-strength steel plate production line is characterized by comprising a feeding system, a heating furnace and a discharging system which are sequentially arranged; the heating furnace comprises a furnace body and a furnace supporting device arranged in the furnace body; the feeding system comprises a horizontal feeding mechanism, a cylinder linkage device and a material supporting fork, wherein the cylinder linkage device is connected to the horizontal feeding mechanism, the material supporting fork is hinged to the cylinder linkage device, the material supporting fork can rotate in a vertical plane by a certain angle under the driving of the cylinder linkage device, and the material supporting fork is used for supporting a sheet material to be fed into the heating furnace and placed on a piece supporting device in the furnace and transferring the sheet material on the piece supporting device in the furnace; the discharging system comprises a material taking fork, a discharging supporting device and a horizontal discharging mechanism, the discharging supporting device is connected to the horizontal discharging mechanism, the discharging fork is connected to the discharging supporting device, the material taking fork can rotate in a vertical plane for a certain angle under the driving of the discharging supporting device, and the discharging fork is used for entering a heating furnace to support plates on the supporting device in the heating furnace.

2. The heating system of claim 1, wherein the heating furnace further comprises a front door and a rear door, the front door and the rear door are controlled to open and close by a front door opening and closing mechanism and a rear door opening and closing mechanism, the front door opening and closing mechanism and the rear door opening and closing mechanism are respectively mounted on the front door frame and the rear door frame, and the front door and the rear door are sealed with the furnace body through a door closing cylinder 34.

3. The heating system of claim 2, wherein the furnace door opening and closing mechanism comprises a furnace door opening and closing servo motor, a furnace door sprocket chain pair and a furnace door guide rail, the furnace door opening and closing servo motor is fixed on the cross beam of the portal frame, the furnace door opening and closing servo motor is connected with the furnace door frame through the furnace door sprocket chain pair, the furnace door is connected with the furnace door guide rail through the furnace door frame, and the furnace door guide rail is vertically fixed on the upright post of the portal frame.

4. The heating system of claim 1, wherein the horizontal feeding mechanism of the feeding system comprises a feeding base, a feeding servo motor, a feeding sliding table, a guide rail and a feeding rack-and-pinion pair; the guide rail is fixed on the feeding base, the feeding sliding table is connected to the guide rail in a sliding mode, and the feeding servo motor is connected with the feeding sliding table through a feeding gear rack pair; and the cylinder linkage device is arranged on the feeding sliding table in parallel.

5. The heating system of claim 1, wherein the cylinder linkage of the feeding system comprises a driving cylinder, a lower connecting block, a connecting rod, and an upper connecting block; drive actuating cylinder horizontal fixation on pay-off slip table, cylinder hub connection lower connecting block, the connecting rod both ends are articulated in upper and lower connecting block respectively, go up the connecting block and fix at holding in the palm material fork tip.

6. The heating system of claim 1, wherein the horizontal discharging mechanism of the discharging system comprises a discharging sliding table, a discharging servo motor, a discharging gear rack pair, a discharging guide rail and a discharging base; the discharging guide rail is fixed on the discharging base, the discharging sliding table is connected to the discharging guide rail in a sliding mode, and the discharging servo motor is connected with the discharging sliding table through a discharging gear rack pair; the discharging supporting device is arranged on the discharging sliding table in parallel.

7. The heating system of claim 1, wherein the discharging and lifting device of the discharging system comprises a driving cylinder, a lower connecting block, a connecting rod and an upper connecting block, the driving cylinder is horizontally fixed on the discharging sliding table, the cylinder is connected with the lower connecting block through a shaft, two ends of the connecting rod are respectively hinged with the upper connecting block and the lower connecting block, and the upper connecting block is fixed at the end of the discharging fork.