CN112222319A

CN112222319A - Multi-station high-strength steel hot forming press and processing method thereof

Info

Publication number: CN112222319A
Application number: CN202011149604.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-01-15

Abstract

The invention discloses a multi-station high-strength steel hot forming press and a processing method thereof, wherein the press comprises a base, a processing slide seat and a driving device, wherein a plurality of processing die holders are distributed on the upper side of the base, and at least one of the processing die holders is connected with a flexible hydraulic buffer device capable of providing adjustable buffer force; the processing slide is arranged above the plurality of processing mold bases, the processing slide can also be pressed downwards to move and position relative to the processing mold bases under the drive control of the drive device, and a plurality of processing devices which are respectively matched with the plurality of processing mold bases in a one-to-one correspondence mode are further installed on the lower side of the processing slide. The hot forming press is novel and reasonable in structure, simple to operate and high in automation degree, well meets the production requirements of 'multi-station, multi-processing mode, high processing precision, high processing quality and high processing safety' in the process of manufacturing high-strength steel hot forming products, and improves the product quality and the production efficiency.

Description

Multi-station high-strength steel hot forming press and processing method thereof

Technical Field

The invention relates to the technical field of die devices, and particularly provides a multi-station high-strength steel hot forming press and a processing method thereof.

Background

At present, a hydraulic press or a servo press is used for providing power when high-strength steel hot forming automobile body safety structural parts are manufactured in China. Among them, 1) regarding the hydraulic press, it is easy to obtain a large working stroke and can exert pressure at any position of the stroke, thereby realizing stepless adjustment of speed and pressure in a wide range, but the hydraulic press also has some disadvantages, such as: firstly, a hydraulic press machine adopts high-pressure liquid (such as hydraulic oil or emulsion) as a working medium, so that the requirement on the precision of a hydraulic element is higher; moreover, the leakage of high-pressure liquid is difficult to avoid, so that not only is hydraulic oil wasted and the working environment polluted, but also the risk of fire hazard is caused when the high-pressure liquid is used in a thermal forming field; secondly, the whole structure of the hydraulic press is complex, and the equipment is difficult to adjust and maintain; and so on. 2) The servo press has the characteristics of high precision, high efficiency, low energy consumption and the like, but has the defects of high initial investment cost of equipment, high spare parts, long delivery period, complex and difficult maintenance and the like.

Therefore, the existing high-strength steel hot forming equipment cannot well meet the production and market requirements. In view of the above, the present invention is particularly proposed.

Disclosure of Invention

In order to overcome the defects, the invention provides the multi-station high-strength steel hot forming press and the processing method thereof, the multi-station high-strength steel hot forming press is novel and reasonable in structure, simple to operate and high in automation degree, the production requirements of 'multi-station, multi-processing mode, high processing precision, high processing quality and high processing safety' in the process of manufacturing high-strength steel hot forming products are well met, the product quality is improved, and the production efficiency is also improved.

The technical scheme adopted by the invention for solving the technical problem is as follows: a multi-station high-strength steel hot forming press comprises a base, a processing slide seat and a driving device, wherein a plurality of processing mold seats are distributed on the upper side of the base, and at least one processing mold seat is connected with a flexible hydraulic buffer device capable of providing adjustable buffer force; the processing slide arranges in a plurality of the top of processing die holder, just the processing slide can also be in drive arrangement's drive control is relative the processing die holder pushes down the shift positioning, in addition, still install a plurality of respectively on the processing slide downside with a plurality of processing die holder one-to-one complex processing device.

As a further improvement of the invention, the flexible hydraulic buffer device comprises a hydraulic pressure box and a hydraulic control system, wherein the hydraulic pressure box is provided with a box body arranged on the upper side of the base and a plurality of oil cylinders arranged in the box body in an array manner, piston rods of the oil cylinders can perform up-and-down telescopic motion, and the hydraulic control system is connected between an external oil supply source and the hydraulic pressure box so as to provide oil pressure input with adjustable pressure values for the oil cylinders;

defining the processing die holder matched with the flexible hydraulic buffer device as a processing die holder A, wherein the processing die holder A is arranged above the box body and is simultaneously connected with the top ends of the piston rods of the oil cylinders in a positioning manner;

in addition, a rack is arranged, the driving device is arranged above the plurality of processing die holders through the rack, and the processing sliding seat is connected to the tail end execution unit of the driving device.

As a further improvement of the invention, the oil cylinder adopts one of a plunger oil cylinder and a double-acting hydraulic oil cylinder;

the frame adopts a portal frame structure, namely the frame is provided with two upright posts which are oppositely arranged outside two sides of the base and a cross beam which spans and is fixedly connected to the top ends of the two upright posts;

the driving device comprises a motor, a rotating main shaft, a flywheel, two eccentric gears and two crank connecting rods, wherein the motor is positioned and installed on the cross beam, the rotating main shaft is transversely placed and rotatably installed on the cross beam, the flywheel is sleeved on the rotating main shaft and is in transmission connection with a power output shaft of the motor through a transmission belt, and in addition, a clutch is also installed between the flywheel and the rotating main shaft; the two eccentric gears are transversely arranged on the cross beam in parallel in a rotating mode, are in transmission connection with the rotating main shaft respectively, and are opposite in rotating direction; two the crank connecting rod belongs to drive arrangement's end execution unit, two the upper end of crank connecting rod is articulated respectively to be installed on two on the eccentric gear, and two the lower extreme of crank connecting rod is equallyd divide and is articulated respectively to be installed on the processing slide.

As a further improvement of the present invention, a structure for realizing transmission connection between the two eccentric gears and the rotating main shaft respectively is as follows: three transition gears are further rotatably mounted on the cross beam, one transition gear is meshed and connected between the rotating main shaft and one eccentric gear, the rest two transition gears are meshed and connected with each other, and the rest two transition gears are further meshed and connected with the rotating main shaft and the other eccentric gear respectively.

As a further improvement of the invention, the processing slide seat is provided with a connecting plate and a mounting slide block which is positioned and connected on the lower side of the connecting plate and used for mounting a plurality of processing devices;

the lower ends of the two crank connecting rods are respectively hinged on the connecting plate, and the lower ends of the two crank connecting rods are respectively provided with an overload protection oil cylinder.

As a further improvement of the invention, a plurality of processing die holders are arranged on the upper side of the base side by side along the length direction of the beam;

correspondingly, a plurality of processing devices are arranged on the lower side of the mounting sliding block side by side along the length direction of the cross beam.

As a further improvement of the invention, an angle encoder for sensing the rotation angle of the eccentric gear is mounted on the cross beam; a linear displacement encoder for sensing displacement information of the mounting slide block is mounted on the upright post;

the hydraulic control system is characterized by further comprising a controller, and the oil cylinders, the hydraulic control system, the motor, the clutch, the overload protection oil cylinder, the angle encoder and the linear displacement encoder are respectively connected to the controller.

The invention also provides a processing method of the multi-station high-strength steel hot forming press, which comprises the following processing steps:

step 1): according to the processing content, the operation modes of the multi-station high-strength steel hot forming press are classified as follows: a first punching mode in which a pressure holding operation is required, and a second punching mode in which a pressure holding operation is not required;

in addition, the processing device matched with the flexible hydraulic buffer device is defined as a first type of processing device, and the rest processing devices are defined as a second type of processing devices;

step 2): the controller identifies and controls the multi-station high-strength steel hot forming press to execute corresponding operation modes:

A) when this multistation high strength steel thermoforming press carries out first punching press mode, drive arrangement drive the processing slide is relative the processing die holder carries out the removal of pushing down, and: after the processing sliding seat moves downwards to a set first position, the flexible hydraulic buffer device is started and enters an over-regulation standby stage; when the processing slide seat moves downwards continuously to a set second position, the flexible hydraulic buffer device firstly pushes the processing mold seat connected with the flexible hydraulic buffer device upwards to enable the processing mold seat to be contacted with the first type of processing device matched with the processing mold seat, and then the flexible hydraulic buffer device generates adjustable buffer pressure on the processing slide seat and the first type of processing device on the processing slide seat according to the running state of the processing slide seat so as to prevent the processing slide seat and the first type of processing device on the processing slide seat from landing hard; after the machining sliding seat continues to move downwards to a set third position, the driving device stops power output work, the flexible hydraulic buffer device continues to provide adjustable buffer pressure, so that the machining die holder is tightly pressed with the first type of machining device, and the multi-station high-strength steel hot forming press enters a pressure maintaining operation stage;

after the pressure maintaining operation is finished, the multi-station high-strength steel hot forming press sequentially performs the following steps 3) and 4);

B) when the multi-station high-strength steel hot forming press is in a second stamping mode, the driving device drives the machining sliding seat to downwards move relative to the machining die holder until the second machining device on the machining sliding seat finishes corresponding technological machining on a product placed on the machining die holder, and then the multi-station high-strength steel hot forming press performs the following step 4); in the second stamping mode, the flexible hydraulic buffer device does not start to work;

step 3): after the pressure maintaining operation is finished, the flexible hydraulic buffer device performs pressure relief operation;

step 4): the driving device drives the processing slide carriage and the plurality of processing devices on the processing slide carriage to move upwards together for resetting.

The invention has the beneficial effects that: the high-strength steel hot forming press is novel and reasonable in structure, simple to operate and high in automation degree, and well meets the production requirements of 'multi-station, multi-processing mode, high processing precision, high processing quality and high processing safety' in the process of manufacturing high-strength steel hot forming products, so that the product quality is improved, the mechanical strength of the manufactured parts can reach 1500Mpa, and the production efficiency is improved. Secondly, the high-strength steel hot forming press is easy to process and manufacture, low in manufacturing cost and beneficial to popularization and application. The high-strength steel hot forming press machine is easy to maintain and manage in the using process, the defects of oil drainage, fire, environmental pollution and the like are avoided, and the use safety is high.

Drawings

FIG. 1 is a schematic structural view of a multi-station high-strength steel hot forming press according to the present invention;

FIG. 2 is a schematic structural diagram of the driving device according to the present invention;

FIG. 3 is a schematic structural diagram of the flexible hydraulic buffer device according to the present invention;

fig. 4 is a partially enlarged schematic structural diagram of the hydraulic control system according to the present invention.

The following description is made with reference to the accompanying drawings:

1-a base; 2, processing a sliding seat; 20-a connecting plate; 21, installing a sliding block; 3-a driving device; 30, a motor; 31 — rotating the spindle; 32-a flywheel; 33-an eccentric gear; 34-a crank link; 35-a drive belt; 36-a transition gear; 37-overload protection oil cylinder; 370-a hydraulic pump; 371-proportional valve; 372-a logic valve; 38-angular encoder; 39-linear displacement encoder; 4, processing a die holder; 5, a flexible hydraulic buffer device; 50-oil cylinder; 51-a hydraulic directional valve; 52-high pressure flow limiting valve; 53-low pressure flow-limiting valve; 54-pressure regulating servo valve; 550-line B; 551-line C; 552-line D; 553-line E; 554 — line F; 555 — line G; 556 — line I; 56-an accumulator; 57-back pressure valve; 58-relief valve; 59-a buffer; 510-branch pipe; 6, a frame; 60-upright column; 61-beam.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific embodiments, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance. The terms "first", "second", "third", "a", "B", "C", "D", and the like in the description are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship thereof are to be regarded as the scope of the present invention without substantial technical changes.

Example 1:

fig. 1 is a schematic structural view of a multi-station high-strength steel hot forming press according to the present invention.

The multi-station high-strength steel hot forming press comprises a base 1, a processing slide seat 2 and a driving device 3, wherein a plurality of processing die holders 4 are distributed on the upper side of the base 1, and at least one of the processing die holders 4 is connected with a flexible hydraulic buffer device 5 capable of providing adjustable buffer force; processing slide 2 arranges in a plurality of the top of processing die holder 4, just processing slide 2 can also be in drive arrangement 3's drive control is relative processing die holder 4 pushes down the removal location, in addition, still install a plurality ofly respectively with a plurality of on the 2 downside of processing slide according to the production demand processing device (like clamp plate, drift, cutter etc.) of 4 one-to-one complex of processing die holder.

In this embodiment, preferably, the flexible hydraulic buffer device 5 includes a hydraulic pressure box and a hydraulic control system, the hydraulic pressure box has a box body disposed on the upper side of the base 1 and a plurality of oil cylinders 50 arranged in the box body in an array manner, piston rods of the oil cylinders 50 can perform up-and-down telescopic motion, and the hydraulic control system is connected between an external oil supply source and the hydraulic pressure box to provide oil pressure input with adjustable pressure values to the oil cylinders 50;

defining the processing die holder 4 matched with the flexible hydraulic buffer device 5 as a processing die holder A (which is only clear for convenience of description and has no other limiting meanings), wherein the processing die holder A is arranged above the box body and is simultaneously connected with the top ends of the piston rods of the oil cylinders 50 in a positioning manner, namely the piston rods of the oil cylinders point upwards to drive the processing die holder A to perform ejection or retraction movement;

in addition, a frame 6 is provided, the driving device 3 is arranged above the plurality of processing die holders 4 through the frame 6, and the processing slide 2 is connected to an end execution unit of the driving device 3.

In this embodiment, it is further preferable that the cylinder 50 is one of a plunger cylinder and a double-acting hydraulic cylinder, but not limited to the above two;

the specific structure of the hydraulic control system can refer to the structure of the hydraulic control system disclosed in chinese patent 202021902598.0, and is specifically described as follows: the hydraulic control system has a hydraulic directional control valve 51, a high-pressure flow-limiting valve 52, a low-pressure flow-limiting valve 53, a pressure-regulating servo valve 54 and an accumulator 56, as shown in fig. 3 and fig. 4, wherein an oil inlet P1 of the hydraulic directional control valve 51 is communicated with an external oil supply source through a pipeline a, a first oil outlet a1 of the hydraulic directional control valve 51 is communicated with an oil inlet of the high-pressure flow-limiting valve 52 through a pipeline B550, a second oil outlet B1 of the hydraulic directional control valve 51 is communicated with an oil inlet of the low-pressure flow-limiting valve 53 through a pipeline C551, an oil outlet of the high-pressure flow-limiting valve 52 is further communicated with an oil outlet of the low-pressure flow-limiting valve 53 through a pipeline D552, an oil inlet P2 of the pressure-regulating servo valve 54 is communicated with the pipeline D552 through a pipeline E553, and an oil return port T2 of the pressure-regulating servo valve 54 is communicated with, a pipeline G555 is connected to a first oil outlet A2 of the pressure regulating servo valve 54, oil inlets of the oil cylinders 50 are communicated with the pipeline G555, a second oil outlet B2 of the pressure regulating servo valve 54 is closed, a leakage port Y1 of the pressure regulating servo valve 54 is communicated with an external oil tank, the energy accumulator 56 is communicated with a hydraulic control port X1 of the pressure regulating servo valve 54 through a pipeline H to provide a pilot constant-pressure source for the pressure regulating servo valve 54, and a coupling switch valve A is further mounted on the pipeline H; in addition, a back pressure valve 57 is installed on the line F554; an overflow valve 58 is mounted on the pipeline G555, that is, an oil inlet A3 and a hydraulic control port X2 of the overflow valve 58 are both communicated with the pipeline G555, a leakage port Y2 and an oil outlet B3 of the overflow valve 58 are both communicated with an external oil tank, a buffer 59 is further mounted on a pipeline I556 connected between the oil outlet B3 of the overflow valve 58 and the external oil tank, and meanwhile, the pipeline I556 can also be communicated with the pipeline F554; a pressure sensor and the like are also mounted on the pipeline G555. In short, by means of the hydraulic control system, the oil pressure input with adjustable pressure value can be provided for the oil cylinders 50.

Further preferably, the oil cylinders 50 are divided into a plurality of oil cylinder units arranged in parallel, that is, each oil cylinder unit is composed of a plurality of oil cylinders 50 arranged in parallel; a branch pipeline 510 is respectively arranged beside each oil cylinder unit, oil inlets of a plurality of oil cylinders 50 in each oil cylinder unit are communicated with the corresponding branch pipelines 510, and meanwhile, the branch pipelines 510 are communicated with the pipeline G555.

More preferably, the branch pipes 510 are arranged in parallel, that is, the branch pipes 510 divide the pipe G555 into multiple sections, and each section of the pipe G555 is further provided with a switch valve (e.g., a coupling switch valve).

In this embodiment, preferably, the frame 6 is of a gantry structure, that is, the frame 6 has two columns 60 oppositely disposed outside of two sides of the base 1 and a beam 61 crossing and fixedly connected to top ends of the two columns 60;

the driving device 3 includes a motor 30, a rotating main shaft 31, a flywheel 32, two eccentric gears 33 and two crank connecting rods 34, and specifically refer to fig. 2, wherein the motor 30 is positioned and mounted on the cross beam 61, the rotating main shaft 31 is transversely placed and rotatably mounted on the cross beam 61, the flywheel 32 is sleeved on the rotating main shaft 31, the flywheel 32 is also in transmission connection with a power output shaft of the motor 30 through a transmission belt 35, and in addition, a clutch is also mounted between the flywheel 32 and the rotating main shaft 31; the two eccentric gears 33 are transversely and parallelly rotatably mounted on the cross beam 61, the two eccentric gears 33 are respectively in transmission connection with the rotating main shaft 31, and the rotating directions of the two eccentric gears 33 are opposite; the two crank connecting rods 34 belong to the tail end execution unit of the driving device 3, the upper ends of the two crank connecting rods 34 are respectively and hingedly mounted on the two eccentric gears 33, and the lower ends of the two crank connecting rods 34 are respectively and hingedly mounted on the machining slide base 2.

Further preferably, the structure for realizing the transmission connection between the two eccentric gears 33 and the rotating main shaft 31 respectively is as follows: three transition gears 36 are further rotatably mounted on the cross beam 61, wherein one transition gear 36 is connected between the rotating main shaft 31 and one eccentric gear 33 in a meshed manner, the remaining two transition gears 36 are connected in a meshed manner, and the remaining two transition gears 36 are further connected with the rotating main shaft 31 and the other eccentric gear 33 in a meshed manner. In addition, the number and arrangement of the eccentric gears, the crank connecting rods and the transition gears in the driving device can be changed according to production requirements, which belongs to the changes easily imaginable for those skilled in the art, and the changes are not essential, so the changes still fall within the scope covered by the technical content disclosed in the patent.

In the present embodiment, preferably, the processing slide 2 has a connecting plate 20 and a mounting slider 21 positioned and connected to the lower side of the connecting plate 20 and used for mounting a plurality of processing devices, as shown in fig. 1 and 2;

the lower ends of the two crank connecting rods 34 are respectively and hingedly mounted on the connecting plate 20, and overload protection cylinders 37 having overload protection function are respectively mounted on the lower ends of the two crank connecting rods 34, as shown in fig. 2. In addition, a control unit for controlling the work of the overload protection cylinders 37 is also arranged, the control unit is provided with a hydraulic pump 370 communicated with an external oil supply source, the oil outlet of the hydraulic pump 370 is communicated with the oil inlets of the two overload protection cylinders 37 through a pipeline, and the pipeline is also provided with a proportional valve 371 and a logic valve 372; when the multi-station high-strength steel hot forming press is in a first stamping mode, according to the preset tonnage, the proportional valve 371 and the logic valve 372 cooperate to regulate an oil pressure value which is larger than the buffering force provided by the flexible hydraulic buffer device 5, so that the contact between the processing slide seat 2 (the crank connecting rod) and the processing die holder A (the flexible hydraulic buffer device 5) can be well protected. In addition, in order to further improve the protection effect, a pressure sensor for sensing the pressure below the crank connecting rod may be further installed at the lower end of the crank connecting rod, so that the proportional valve 371, the logic valve 372 and the flexible hydraulic buffer device 5 may be adjusted in real time.

In this embodiment, preferably, a plurality of the processing mold bases 4 are arranged side by side on the upper side of the base 1 along the length direction of the cross beam 61;

accordingly, a plurality of processing devices are also arranged side by side along the length direction of the beam 61 on the lower side of the mounting slider 21.

Preferably, an angle encoder 38 for sensing a rotation angle of the eccentric gear 33 is installed on the cross beam 61; a linear displacement encoder 39 for sensing displacement information of the mounting slider 21 is mounted on the column 60, as shown in fig. 1 and 2;

a controller is further provided, and the plurality of oil cylinders 50, the hydraulic control system, the motor 30, the clutch, the overload protection oil cylinder 37, the angle encoder 38 and the linear displacement encoder 39 are respectively connected to the controller.

Example 2:

the embodiment 2 provides a processing method of the multi-station high-strength steel hot forming press, which includes the following processing steps:

in addition, the processing device matched with the flexible hydraulic buffer device 5 is defined as a first type of processing device (such as a pressing plate and the like), and the rest processing devices are defined as a second type of processing device (such as a punch, a cutter and the like); it is defined so as to be clear for the description only, and not to have any other limiting meaning;

step 2): the controller identifies according to the processing die holder layout (i.e. identifies what processing mode should be performed), and controls the multi-station high-strength steel hot forming press to execute corresponding operation modes:

A) when the multi-station high-strength steel hot forming press is in the first punching mode, the driving device 3 drives the machining slide seat 2 to move downwards relative to the machining slide seat 4, and the multi-station high-strength steel hot forming press comprises: after the machining sliding seat 2 moves downwards to a set first position, the flexible hydraulic buffer device 5 is started and enters an over-regulation standby stage; after the machining sliding seat 2 continues to move downwards to a set second position (at the moment, the inclination angle of the two crank connecting rods 34 relative to the vertical surface is 5-10 degrees), the flexible hydraulic buffer device 5 firstly ejects the machining die holder 4 (namely, the machining die holder A) connected with the flexible hydraulic buffer device upwards to enable the machining die holder 4 to be in contact with the first type of machining device matched with the machining die holder 4, and then the flexible hydraulic buffer device 5 generates adjustable buffer pressure on the machining sliding seat 2 and the first type of machining device on the machining sliding seat according to the running state of the machining sliding seat 2 so as to prevent the machining sliding seat 2 and the first type of machining device on the machining sliding seat from hard landing; after the machining slide seat 2 continues to move downwards to a set third position (at the moment, the two crank connecting rods 34 are in a vertical state), the driving device 3 stops power output work, the flexible hydraulic buffer device 5 continues to provide adjustable buffer pressure, so that the machining die holder 4 (namely the machining die holder A) is tightly pressed with the first type of machining device, and the multi-station high-strength steel hot forming press enters a pressure maintaining operation stage;

B) when the multi-station high-strength steel hot forming press is in a second stamping mode, the driving device 3 drives the processing slide seat 2 to move downwards relative to the processing mold seat 4 until the second type of processing devices on the processing slide seat 2 finish corresponding process machining on the products on the processing mold seat 4, and then the multi-station high-strength steel hot forming press carries out the following step 4); namely, in the second stamping mode, the flexible hydraulic buffer device 5 is not started to work;

step 3): after the pressure maintaining operation is finished, the flexible hydraulic buffer device 5 performs pressure relief operation, but the flexible hydraulic buffer device 5 cannot perform complete pressure relief, and a smaller pressure value needs to be reserved to reserve the ejection function for the processing die holder 4 on the flexible hydraulic buffer device;

step 4): the driving device 3 drives the processing slide 2 and a plurality of processing devices thereon to move upwards together for resetting.

Preferably, in the step 2), the method of determining the "first position", the "second position", and the "third position" includes: a working condition A corresponding to the first position, a working condition B corresponding to the second position and a working condition C corresponding to the third position are set in the controller; the angle encoder 38 transmits the sensed information of the angle value of the rotation of the eccentric gear 33 to the controller in real time, the linear displacement encoder 39 transmits the sensed information of the displacement of the mounting slide block 21 to the controller in real time, and the controller compares and analyzes the received angle value and the received displacement information according to the set working conditions of the controller to correspondingly obtain the downward moving position of the machining slide base 2. Such as: when the angle value and the displacement information received by the controller fall into the range of the working condition A, the controller judges that the machining slide seat 2 moves downwards to the first position; … … are provided.

In conclusion, the high-strength steel hot forming press machine is novel and reasonable in structure, simple to operate and high in automation degree, and well meets the production requirements of 'multi-station, multi-processing mode, high processing precision, high processing quality and high processing safety' in the process of manufacturing high-strength steel hot forming products, so that the product quality is improved, the mechanical strength of the manufactured parts can reach 1500MPa, and the production efficiency is improved. In addition, the high-strength steel hot forming press is easy to process and manufacture, low in manufacturing cost and beneficial to popularization and application. In addition, the high-strength steel hot forming press machine is easy to maintain and manage in the using process, the defects of oil drainage, fire, environmental pollution and the like are avoided, and the use safety is high.

The above description is only a preferred embodiment of the present invention, but not intended to limit the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as within the protective scope of the present invention.

Claims

1. The utility model provides a multistation high strength steel thermoforming press which characterized in that: the device comprises a base (1), a processing sliding seat (2) and a driving device (3), wherein a plurality of processing die holders (4) are distributed on the upper side of the base (1), and at least one of the processing die holders (4) is connected with a flexible hydraulic buffer device (5) capable of providing adjustable buffer force; processing slide (2) arrange in a plurality of the top of processing die holder (4), just processing slide (2) can also be in relative under the drive control of drive arrangement (3) processing die holder (4) are pushed down and are removed the location, in addition still install a plurality of respectively with a plurality of on processing slide (2) downside processing die holder (4) one-to-one complex processing device.

2. The multi-station high-strength steel hot forming press according to claim 1, characterized in that: the flexible hydraulic buffer device (5) comprises a hydraulic pressure box and a hydraulic control system, the hydraulic pressure box is provided with a box body arranged on the upper side of the base (1) and a plurality of oil cylinders (50) arranged in the box body in an array mode, piston rods of the oil cylinders (50) can stretch up and down, and the hydraulic control system is connected between an external oil supply source and the hydraulic pressure box to provide oil pressure input with adjustable pressure values for the oil cylinders (50);

defining the processing die holder (4) matched with the flexible hydraulic buffer device (5) as a processing die holder A, wherein the processing die holder A is arranged above the box body and is simultaneously connected with the top ends of the piston rods of the oil cylinders (50) in a positioning manner;

in addition, a rack (6) is arranged, the driving device (3) is arranged above the plurality of processing die holders (4) through the rack (6), and the processing sliding seat (2) is connected to an end execution unit of the driving device (3).

3. The multi-station high-strength steel hot forming press according to claim 2, characterized in that: the oil cylinder (50) adopts one of a plunger oil cylinder and a double-acting hydraulic oil cylinder;

the frame (6) adopts a portal frame structure, namely the frame (6) is provided with two upright posts (60) which are oppositely arranged outside two sides of the base (1) and a cross beam (61) which spans and is fixedly connected to the top ends of the two upright posts (60);

the driving device (3) comprises a motor (30), a rotating main shaft (31), a flywheel (32), two eccentric gears (33) and two crank connecting rods (34), wherein the motor (30) is positioned and mounted on the cross beam (61), the rotating main shaft (31) is transversely placed and rotatably mounted on the cross beam (61), the flywheel (32) is sleeved on the rotating main shaft (31), the flywheel (32) is in transmission connection with a power output shaft of the motor (30) through a transmission belt (35), and a clutch is further mounted between the flywheel (32) and the rotating main shaft (31); the two eccentric gears (33) are transversely and parallelly rotatably mounted on the cross beam (61), the two eccentric gears (33) are respectively in transmission connection with the rotating main shaft (31), and the rotating directions of the two eccentric gears (33) are opposite; two crank connecting rods (34) belong to the tail end execution unit of the driving device (3), the upper ends of the two crank connecting rods (34) are respectively installed on the two eccentric gears (33) in a hinged mode, and the lower ends of the two crank connecting rods (34) are respectively installed on the machining sliding base (2) in a hinged mode.

4. The multi-station high-strength steel hot forming press according to claim 3, characterized in that: the structure for realizing the transmission connection between the two eccentric gears (33) and the rotating main shaft (31) respectively is as follows: three transition gears (36) are further rotatably mounted on the cross beam (61), one transition gear (36) is connected between the rotating main shaft (31) and one eccentric gear (33) in a meshed mode, the rest two transition gears (36) are connected in a meshed mode, and the rest two transition gears (36) are further connected with the rotating main shaft (31) and the other eccentric gear (33) in a meshed mode respectively.

5. The multi-station high-strength steel hot forming press according to claim 3, characterized in that: the processing slide seat (2) is provided with a connecting plate (20) and a mounting slide block (21) which is positioned and connected on the lower side of the connecting plate (20) and used for mounting a plurality of processing devices;

the lower ends of the two crank connecting rods (34) are respectively hinged on the connecting plate (20), and the lower ends of the two crank connecting rods (34) are respectively provided with an overload protection oil cylinder (37).

6. The multi-station high-strength steel hot forming press according to claim 5, characterized in that: the plurality of processing die holders (4) are arranged on the upper side of the base (1) side by side along the length direction of the cross beam (61);

correspondingly, a plurality of processing devices are arranged on the lower side of the mounting slide block (21) side by side along the length direction of the cross beam (61).

7. The multi-station high-strength steel hot forming press according to claim 5, characterized in that: an angle encoder (38) for sensing the rotation angle of the eccentric gear (33) is mounted on the cross beam (61); a linear displacement encoder (39) for sensing displacement information of the mounting slide block (21) is mounted on the upright post (60);

the hydraulic control system is characterized by further comprising a controller, and the oil cylinders (50), the hydraulic control system, the motor (30), the clutch, the overload protection oil cylinder (37), the angle encoder (38) and the linear displacement encoder (39) are respectively connected to the controller.

8. A method of processing a multi-station high-strength steel hot forming press according to any one of claims 1 to 7, characterized in that: the method comprises the following processing steps:

in addition, a processing device matched with the flexible hydraulic buffer device (5) is defined as a first type of processing device, and the rest processing devices are defined as a second type of processing devices;

A) when the multi-station high-strength steel hot forming press is in a first stamping mode, the driving device (3) drives the machining sliding seat (2) to downwards press and move relative to the machining die holder (4), and the multi-station high-strength steel hot forming press comprises: after the machining sliding seat (2) moves downwards to a set first position, the flexible hydraulic buffer device (5) is started and enters a super-adjustment standby stage; after the machining sliding seat (2) continues to move downwards to a set second position, the flexible hydraulic buffer device (5) firstly pushes the machining die holder (4) connected with the flexible hydraulic buffer device upwards to enable the machining die holder (4) to be in contact with the first type of machining devices matched with the machining die holder, and then the flexible hydraulic buffer device (5) generates adjustable buffer pressure on the machining sliding seat (2) and the first type of machining devices on the machining sliding seat according to the running state of the machining sliding seat (2) so as to prevent the machining sliding seat (2) and the first type of machining devices on the machining sliding seat from hard landing; thirdly, after the machining sliding seat (2) continuously moves downwards to a set third position, the driving device (3) stops power output work, the flexible hydraulic buffer device (5) continuously provides adjustable buffer pressure, so that the machining die holder (4) is tightly pressed with the first type of machining devices, and the multi-station high-strength steel hot forming press enters a pressure maintaining operation stage;

B) when the multi-station high-strength steel hot forming press is in a second stamping mode, the driving device (3) drives the machining slide seat (2) to move downwards relative to the machining mold seat (4) until the second machining device on the machining slide seat (2) completes corresponding process machining on a product placed on the machining mold seat (4), and then the multi-station high-strength steel hot forming press performs the following step 4); namely, under the second stamping mode, the flexible hydraulic buffer device (5) does not start to work;

step 3): after the pressure maintaining operation is finished, the flexible hydraulic buffer device (5) performs pressure relief operation;

step 4): the driving device (3) drives the processing slide seat (2) and the plurality of processing devices on the processing slide seat to move upwards together for resetting.