CN110860581A - Thermal shaping system and thermal shaping method - Google Patents
Thermal shaping system and thermal shaping method Download PDFInfo
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- CN110860581A CN110860581A CN201911295239.5A CN201911295239A CN110860581A CN 110860581 A CN110860581 A CN 110860581A CN 201911295239 A CN201911295239 A CN 201911295239A CN 110860581 A CN110860581 A CN 110860581A
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- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000007731 hot pressing Methods 0.000 claims abstract description 16
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- 230000005489 elastic deformation Effects 0.000 description 2
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- 238000003878 thermal aging Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a thermal shaping system and a thermal shaping method. The thermal shaping system includes: the manipulator is used for picking and placing workpieces; the thermal shaping device comprises an upper die and a lower die which are oppositely arranged from top to bottom, the upper die and the lower die are assembled to form a cavity so as to press and shape a workpiece to be shaped, and the heating mechanism is connected with the upper die and/or the lower die and can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity; and the cooling device is used for cooling and forming at least one workpiece shaped by the at least one thermal shaping device. The invention combines mechanical deformation and hot-pressing deformation, can improve the shaping efficiency and the shaping effect of the product, improves the product yield, and can reduce the jig cost and the labor cost.
Description
Technical Field
The invention relates to the technical field of workpiece thermal shaping, in particular to a thermal shaping system and a thermal shaping method.
Background
The thin wall thickness of the thin-wall part determines that the thin-wall part has poor capability of resisting internal stress deformation and external force deformation and is easy to deform. When the product structure of the thin-wall part is complex, the deformation phenomenon is particularly serious when the wall thickness of each part is greatly different, and the deformation is easily generated due to the action of internal stress and external force particularly during the processing procedures such as casting, stamping, CNC (computer numerical control) processing, grinding, carrying, extruding and the like. In order to ensure the quality of thin-wall parts, the deformed thin-wall parts need to be shaped so as to meet the requirements of appearance and product structure assembly relation.
The existing stress eliminating methods mainly comprise a natural aging method, a mechanical stress eliminating method and a thermal aging stress eliminating method, wherein the natural aging method is used for naturally placing the product, so that the stress in the product can be released to a certain extent along with the lengthening of time. However, the required time of natural aging is very long, and only internal stress can be eliminated, so that the purpose of complete shaping cannot be achieved, and the product requirement is met. The mechanical stress relief method forces the product to generate plastic deformation under the action of external force so as to achieve the required flatness. Although the mechanical stress relief method can meet the requirement of flatness of products in a short time, the internal stress is not completely relieved, and the residual internal stress causes automatic deformation of the products along with the lapse of time. The thermal aging stress removal method is characterized in that a workpiece is placed on a profiling jig and is put into an oven together for aging heat treatment, so that the purpose of stress relief is achieved, however, the jig is high in development cost, the reshaping manpower is high in demand, and the risk of scalding operators exists at high temperature.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a thermal shaping system and a thermal shaping method, which are used for shaping a deformed thin-walled workpiece to improve the shaping effect and the shaping efficiency, and simultaneously reduce the development cost and the labor cost of a jig.
An embodiment of the present invention provides a thermal shaping system, including:
the manipulator is used for picking and placing workpieces;
the thermal shaping device comprises an upper die and a lower die which are oppositely arranged up and down, the upper die and the lower die are assembled to form a cavity so as to press and shape the workpiece to be shaped, and the heating mechanism is connected with the upper die and/or the lower die and can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
and the cooling device is used for cooling and forming at least one workpiece shaped by the at least one thermal shaping device.
In some embodiments, the thermal shaping device further includes a frame, the upper die and the lower die are both mounted on the frame and are disposed to move up and down relatively, the lower die is fixedly mounted on the frame, the upper die is connected to a driving mechanism mounted on the top of the frame, and the driving mechanism can drive the upper die to move down and press onto the lower die so as to shape the workpiece.
In some embodiments, the upper die comprises an upper die, an upper die plate and an upper die holder which are sequentially connected from bottom to top, the lower die comprises a lower die, a lower die plate and a lower die holder which are sequentially connected from top to bottom, a placing area for placing the workpiece to be shaped is arranged on the upper surface of the lower die, a pressing area matched with the placing area is arranged on the lower surface of the upper die, and the placing area and the pressing area are matched to form the die cavity.
In some embodiments, the heating mechanism includes a heating tube embedded in the upper and/or lower die plates.
In some embodiments, the workpiece is placed in a placement area of the lower die, and a first sensor for detecting whether the placement area is empty and a second sensor for detecting whether the workpiece is accurately placed in the placement area are arranged on the lower die.
In some embodiments, the thermal shaping system further comprises a feeding device, the feeding device comprises a feeding station for placing the workpiece to be shaped, the feeding device further comprises a detection station, and the detection station is provided with a third sensor for detecting whether the workpiece needs to be shaped.
In some embodiments, the cooling device includes a conveyor belt and a cooling mechanism disposed on the conveyor belt, and the cooling mechanism includes a spraying mechanism or a blowing mechanism.
In some embodiments, the hot pressing temperature and the dwell time of the workpiece after the workpiece is placed in the cavity and clamped are preset to adapt to different workpieces.
The embodiment of the invention also provides a thermal shaping method, which comprises the following steps:
placing a workpiece on at least one thermal shaping device through a manipulator for thermal shaping, wherein the at least one thermal shaping device is sequentially arranged around the manipulator along the clockwise direction or the anticlockwise direction, the thermal shaping device comprises an upper die and a lower die which are oppositely arranged up and down, the upper die and the lower die are assembled to form a cavity so as to press and shape the workpiece to be shaped, which is placed in the cavity, and the thermal shaping device further comprises a heating mechanism connected with the upper die and/or the lower die, and the heating mechanism can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
and taking out at least one workpiece shaped by the at least one thermal shaping device through the manipulator, and cooling and forming the workpiece through a cooling device.
Compared with the prior art, the thermal shaping system and the thermal shaping method provided by the invention have the advantages that the deformed workpiece is placed into the profiling jig to apply appropriate force, so that the workpiece is elastically deformed, meanwhile, the workpiece in a pressed state is heated, the workpiece is converted from elastic deformation into plastic deformation, and is rapidly cooled and formed through the cooling device, the quality of the shaped workpiece is more stable, and the yield of the workpiece can be improved. In addition, a plurality of thermal shaping devices are arranged to be matched with the manipulator, so that thermal shaping can be performed on a plurality of workpieces, shaping efficiency is improved, jig cost is reduced to a great extent, labor is saved, and working strength of operators is greatly reduced.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
FIG. 1 is a schematic structural diagram of a thermal shaping system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a thermal shaping device according to an embodiment of the present invention;
fig. 3 is a flowchart of a thermal shaping method according to an embodiment of the invention.
Reference numerals:
10-mechanical arm, 20-thermal shaping device, 201-first thermal shaping device, 202-second thermal shaping device, 203-third thermal shaping device, 30-cooling device, 301-conveyor belt and 40-inspection device;
11-upper die, 12-upper template and 13-upper die holder; 21-lower die, 22-lower template and 23-lower die holder; 3-frame, 41-hydraulic cylinder, 42-hydraulic rod, 5-guide rod, 6-control button.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Fig. 1 is a schematic structural diagram of a thermal shaping system according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a thermal shaping system for shaping a deformed workpiece (not shown), the thermal shaping system comprising:
the manipulator 10 is used for picking and placing workpieces;
the thermal shaping device 20 comprises an upper die and a lower die which are oppositely arranged up and down, a cavity is formed after the upper die and the lower die are assembled, and the workpiece placed in the cavity is pressed and shaped, and the heating mechanism is connected with the upper die and/or the lower die and can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
and a cooling device 30, wherein at least one workpiece shaped by the at least one thermal shaping device 20 is cooled and formed by the cooling device 30.
According to the embodiment of the invention, the deformed workpiece is placed into the profiling jig to apply a proper force, so that the workpiece is elastically deformed, and meanwhile, the workpiece in a pressed state is heated, so that the workpiece is converted from elastic deformation into plastic deformation, and is rapidly cooled and formed through the cooling device, the quality of the shaped workpiece is more stable, and the yield of the workpiece can be improved. In addition, a plurality of thermal shaping devices are arranged to be matched with the manipulator, so that thermal shaping can be performed on a plurality of workpieces, shaping efficiency is improved, jig cost is reduced to a great extent, labor is saved, and working strength of operators is greatly reduced.
The thermal shaping system further includes a control device (not shown) electrically connected to the robot 10, the at least one thermal shaping device 20, and the cooling device 30, respectively, to control the shaping process of the workpiece. Specifically, the control device controls the manipulator 10 to feed materials, places the workpiece to be shaped into the lower die, controls the thermal shaping device to close the upper die and the lower die, and controls the heating mechanism to heat to a preset temperature to thermally shape the workpiece pressed in the cavity; after the product is shaped by the thermal shaping device 20, the control device controls the thermal shaping device to open the upper and lower dies, controls the manipulator 10 to discharge, takes out the workpiece and conveys the workpiece to the cooling device 30 for cooling and forming.
As shown in fig. 1, the robot 10 is rotatable and can rotate to a position corresponding to the thermal shaping device 20 or the cooling device 30 to perform feeding and discharging, and the thermal shaping devices 20 and the cooling device 30 can operate simultaneously to shape a plurality of workpieces simultaneously, thereby improving the shaping efficiency and reducing the labor cost. In this embodiment, 3 thermal shaping devices 20, namely, a first thermal shaping device 201, a second thermal shaping device 202 and a third thermal shaping device 203, are arranged along the counterclockwise direction, and a cooling device 30 is arranged at the end of the third thermal shaping device 203 to realize streamlined shaping. The number of the heat shaping devices 20 may be set according to the number of the workpieces to be shaped, and the present invention is not particularly limited.
As shown in fig. 2, the thermal shaping device 20 further includes a frame 3, and the upper mold and the lower mold are mounted on the frame 3 and are disposed to move up and down relatively. In this embodiment, the lower die is a fixed die, the upper die is a movable die, the upper die is connected with a driving mechanism installed at the top of the rack 30, the driving mechanism can drive the upper die to move downwards and press the upper die on the lower die, and a workpiece placed on the lower die is shaped by applying a certain pressure.
The upper die comprises an upper die 11, an upper die plate 12 and an upper die base 13 which are sequentially connected from bottom to top, the lower die comprises a lower die 21, a lower die plate 22 and a lower die base 23 which are sequentially connected from top to bottom, the upper die 11 and the lower die 21 are oppositely arranged, the upper surface of the lower die 21 is provided with a placing area for placing a workpiece to be shaped, the lower surface of the upper die 11 is provided with a pressing area matched with the placing area, and after the upper die and the lower die are closed, the placing area and the pressing area are closed to form a cavity.
The cavity formed by the upper die 11 and the lower die 21 is a profiling cavity, and the structure of the profiling cavity is matched with the structure (shape and size) of a workpiece to be shaped. In specific implementation, the structure of the cavity can be adjusted according to the structure of a workpiece to be shaped so as to meet the shaping requirements of different products to be shaped. Only need to change promptly, the bed die can effectively reduce cost. The upper template 12 and the lower template 22 are arranged to provide certain pressure to the upper die and the lower die so as to compress the upper die and the lower die, and meanwhile, the upper die and the lower die can be protected to prevent the upper die and the lower die from being damaged due to overlarge pressure.
Optionally, in some embodiments, the lower surface of the upper die 11 has a ram for pressing the workpiece to increase the pressure applied to the workpiece. The pressure head is uniformly arranged on the lower surface of the upper die 11 to ensure that the workpiece is uniformly stressed.
In some embodiments, the heating mechanism is a heating tube embedded in the upper platen 12 and/or the lower platen 22. By heating the upper template 12 and/or the lower template 22 and conducting heat to the upper mold 11 and/or the lower mold 21, under the action of preset high temperature, the crystal structure pressed in the cavity can be rearranged, the internal stress is released quickly, deformation adaptive to the cavity is generated, and the flatness of the workpiece is improved. The heating pipe is embedded in the upper template 12 and/or the lower template 22, so that the damage to the die due to overhigh temperature during thermal shaping can be prevented; in addition, the heating mechanism is embedded in the upper template 12 and/or the lower template 22, and when different workpieces are shaped, only the upper and lower molds need to be replaced.
In this embodiment, in order to ensure uniform heating and a shaping effect, heating pipes are embedded in the upper mold plate 12 and the lower mold plate 22. Preferably, the heating pipe is a disk-shaped heating pipe, so that the pressing surface can be uniformly heated, different parts of the workpiece in the die can obtain a good shaping effect, and the shaping quality of the workpiece is improved.
The heating mechanism is electrically connected with the control device, and after the power is on, the control device can control the heating mechanism to heat. The heating mechanism adopts electric heating, so that the scalding risk of operators can be reduced, and the production safety is improved.
During hot-pressing shaping, the hot-pressing temperature of the hot-shaping device and the pressure maintaining time after hot-pressing die assembly can be adjusted according to the flatness of the workpiece, and the workpiece to be shaped is subjected to hot-pressing shaping. The dwell time is the time at which the temperature is maintained at a predetermined temperature and pressure. The hot pressing temperature of the workpiece after the workpiece is placed in the cavity and clamped is preset according to the structure of the workpiece to be shaped, for example, the hot pressing temperature can be set according to the material of the workpiece and the size (including the size and the thickness) of the workpiece. Optionally, the workpiece may be subjected to multiple hot shaping verifications at different temperatures to obtain an optimal hot pressing temperature parameter of the workpiece, and the temperature parameter is taken as the hot pressing temperature of the workpiece. The dwell time can be determined according to parameters such as the hot pressing temperature, the magnitude of the pressure applied to the workpiece, the degree of deformation of the workpiece, and the like. Alternatively, multiple thermal shaping verifications can be performed on workpieces with different deformation degrees at preset temperature and pressure to obtain an optimal dwell time parameter of the workpiece, and the dwell time parameter is taken as the dwell time of the workpiece.
Optionally, the workpiece is a thin-walled part, and the thin-walled part may be a die-cast molding part of metal such as magnesium, aluminum, zinc, and the like, may also be an injection molding plastic part of glass fiber, carbon fiber, and the like, and may also be a stamped molding part of metal such as magnesium, aluminum alloy, and the like, which is not particularly limited in the present invention.
In this embodiment, when the workpiece is a magnesium or aluminum alloy member, the hot pressing temperature is preferably 200 to 240 ℃, and the pressure maintaining time is preferably 30 to 50 s. Particularly, when the thin-wall part is a magnesium alloy stamping part, the dwell time is preferably 40s to achieve the best reshaping effect.
The driving mechanism comprises a hydraulic cylinder 41 and a hydraulic rod 42 which is connected with the hydraulic cylinder 41 in a matched manner, the hydraulic cylinder 41 is fixed above the rack 3, the hydraulic cylinder 41 is connected to the upper die through the hydraulic rod 42, the hydraulic cylinder 41 acts, and the hydraulic rod 42 extends out to drive the upper die to move downwards and is matched with the lower die to be pressed tightly to shape the workpiece; after shaping, the hydraulic rod 42 retracts into the hydraulic cylinder 41 to drive the upper die to move upwards for die opening, and the shaped workpiece is taken out.
In this embodiment, the hydraulic cylinder 41 is a hydraulic cylinder. In other embodiments, the driving mechanism may be a driving cylinder, a motor, or the like, and the present invention is not particularly limited.
In some embodiments, the thermal shaping device 20 further includes a guide rod 5 for guiding the movement of the upper mold, one end of the guide rod 5 is connected to the lower mold base 23, and the other end of the guide rod 5 vertically penetrates through the upper mold base 13 to be connected to the top of the frame 3. The guide rod 5 can ensure the stable lifting of the upper die, improve the lifting reliability of the upper die, prevent the deviation of the upper die during moving, and ensure the positioning precision of die assembly.
The hot shaping device 20 further comprises a pressure sensor for detecting the pressure between the upper die and the lower die and a temperature sensor for detecting the hot-pressing temperature, wherein the pressure sensor is arranged on the upper die (movable die) and is electrically connected with the control device; in order to realize real-time monitoring and control and keep the heating temperature within a preset temperature range, the temperature sensors are respectively arranged on the upper die and the lower die and are electrically connected with the control device.
In some embodiments, the workpiece to be shaped is placed in the placement area of the lower mold 21, and the lower mold is further provided with a first sensor for detecting whether the placement area is empty and a second sensor for detecting whether the workpiece is accurately placed in the placement area, so as to ensure continuous shaping. The first sensor and the second sensor are respectively electrically connected with the control device.
In some embodiments, heat shaping device 20 further includes a buzzer electrically connected to the control device to provide an alarm to alert a user when the placement area of heat shaping device 20 is empty or heat shaping device 20 fails, etc.
In some embodiments, a control button 6 is further provided on the housing 3, and the control button 6 is electrically connected to the control device to control the thermal shaping device 20. The control buttons 6 may include control buttons that control the speed of actuation of the drive mechanism, the heating temperature, the pressure applied to the workpiece, and the like.
The cooling device 30 comprises a conveyor belt 301 for conveying the workpieces and a cooling mechanism arranged on the conveyor belt 301, and the shaped workpieces can be rapidly cooled through the cooling mechanism, so that the shaping efficiency is improved. In addition, because the workpiece per se achieves plastic deformation under the profiling pressed state of the thermal shaping device 20, after the workpiece is cooled in the air, the internal stress is released, the product is stable after being stored for a long time, the phenomenon of rebound cannot occur, and the shaping effect is ensured.
In some embodiments, the cooling mechanism includes a spraying mechanism, which is disposed on both sides of the conveyor belt 301 along the conveying direction of the conveyor belt 301, and the cooling water sprayed by the spraying mechanism can cool the workpiece to make it cool and form quickly. The spraying mechanisms are arranged on two sides of the conveyor belt 301, so that cooling water can be uniformly sprayed on the workpiece, and uniform cooling is guaranteed.
In other embodiments, the cooling mechanism may include a blowing mechanism, and the cold air blown by the blowing mechanism may cool the workpiece.
In this embodiment, a mode of conveying and cooling the shaped workpiece at the same time is adopted, so that the arrangement space occupied by the thermal shaping system can be reduced, the shaping efficiency is improved, and the cost is reduced.
The thermal shaping system further comprises a checking device 40 for checking the finished cooled workpiece, by means of which the flatness of the shaped workpiece can be checked to see if it meets the standard. The workpiece inspected by the inspection device 40 is placed on the thermal shaping device 20 by the robot 10 to be secondarily shaped if it is still to be shaped.
In some embodiments, the thermal shaping system further comprises a feeding device (not shown) for placing the workpiece, the feeding device comprises a feeding station for placing the workpiece to be shaped, and the feeding device further comprises a detection station provided with a third sensor for detecting whether the workpiece needs to be shaped. The flatness of the workpiece at the detection station is detected by a third sensor, whether the workpiece needs to be shaped or not is judged, when the third sensor detects that the workpiece is stably placed at the detection station, shaping is not needed, the workpiece is placed on the conveyor belt 301 through the manipulator 10 and is conveyed to the inspection device for inspection; when the third sensor detects that the workpiece is unstably placed at the detection station, the workpiece needs to be shaped, and the workpiece is placed to the feeding station through the mechanical arm 10 to be shaped. Preferably, a plurality of workpieces to be reshaped are arranged in a stacking position.
The third sensor is a distance sensor, and the third sensor can acquire the distance between a plurality of detection points of the workpiece and the reference part and detect whether the distance of the workpiece meets the requirement. In the embodiment, the flatness of the workpiece is determined according to the error range of the distances between the detection points and the corresponding points on the reference member, so that the detection accuracy can be improved. And if the distance error of a certain number of the plurality of detection points exceeds the set distance error range, determining that the workpiece needs to be shaped.
Because the dwell time required for the primary shaping is longer and the dwell time required for the secondary shaping is shorter, in some embodiments, different thermal shaping devices 20 may be used for different shaping processes. For example, the first thermal shaping device 201 and the second thermal shaping device 202 may be used for primary shaping, and the third thermal shaping device 203 may be used for secondary shaping, to improve shaping efficiency.
The embodiment of the invention also provides a thermal shaping method, which comprises the following steps:
step S1: the workpiece is placed on at least one thermal shaping device 20 through a manipulator 10 for thermal shaping, wherein the at least one thermal shaping device 20 is sequentially arranged around the manipulator 10 along the clockwise direction or the anticlockwise direction, the thermal shaping device 20 comprises an upper die and a lower die which are oppositely arranged up and down, the upper die and the lower die are assembled to form a cavity so as to press and shape the workpiece to be shaped, which is placed in the cavity, and the thermal shaping device 20 further comprises a heating mechanism connected with the upper die and/or the lower die, and the heating mechanism can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
step S2: the at least one workpiece shaped by the at least one thermal shaping device 20 is taken out by the robot and is cooled and formed by the cooling device 30.
Before step S1, the method further includes: the thermal shaping device 20 is preheated. The power supply is switched on, the hot shaping device 20 for die assembly is preheated, the shaping efficiency can be improved, the heating temperature is uniform during hot-pressing shaping, and meanwhile, the energy consumption is reduced.
In step S1, the hot pressing temperature of the workpiece after the workpiece is placed in the cavity and the mold is closed is preferably 200 to 240 ℃, and the dwell time is preferably 30 to 50S.
In some embodiments, the hot-forming method further comprises pre-pressing the workpiece to be formed, wherein the pre-pressing occurs before or simultaneously with the hot-press softening deformation of the workpiece to be formed.
Specifically, after the die assembly in step S1, the workpiece may be pre-pressed at a first preset pressure within a first pressure holding time, and further pressed and pressed at a second preset pressure within a second pressure holding time, so as to perform hot press shaping on the workpiece, where the first pressure holding time is less than the second pressure holding time, and the first pressure is less than the second pressure.
The workpiece can be pre-shaped by pre-pressing the workpiece, the shaping can be completed by using smaller pressure for the position with smaller deformation, the position with larger deformation is hot-pressed after pre-pressing to enable the position to deform, the workpiece with smaller deformation can be prevented from being damaged by overlarge pressure, and the shaping effect is ensured.
In some embodiments, the following steps are further included after step S2:
step S3: after the cooling is completed, the workpiece is inspected by the inspection device 40.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. A thermal shaping system, comprising:
the manipulator is used for picking and placing workpieces;
the thermal shaping device comprises an upper die and a lower die which are oppositely arranged up and down, the upper die and the lower die are assembled to form a cavity so as to press and shape the workpiece to be shaped, and the heating mechanism is connected with the upper die and/or the lower die and can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
and the cooling device is used for cooling and forming at least one workpiece shaped by the at least one thermal shaping device.
2. The thermal shaping system of claim 1, wherein the thermal shaping device further comprises a frame, the upper die and the lower die are mounted on the frame and are disposed to move up and down relatively, the lower die is fixedly mounted on the frame, the upper die is connected to a driving mechanism mounted on the top of the frame, and the driving mechanism can drive the upper die to move down and press on the lower die so as to shape the workpiece.
3. The thermal shaping system of claim 2, wherein the upper die comprises an upper die, an upper die plate and an upper die holder which are sequentially connected from bottom to top, the lower die comprises a lower die, a lower die plate and a lower die holder which are sequentially connected from top to bottom, a placing area for placing the workpiece to be shaped is arranged on the upper surface of the lower die, a pressing area matched with the placing area is arranged on the lower surface of the upper die, and the placing area and the pressing area are matched to form the cavity.
4. The thermal shaping system of claim 3, wherein the heating mechanism comprises a heating tube embedded in the upper and/or lower die plates.
5. The thermal shaping system according to claim 3, wherein the workpiece is placed in a placement area of the lower die, and a first sensor for detecting whether the placement area is empty and a second sensor for detecting whether the workpiece is accurately placed in the placement area are provided on the lower die.
6. The thermal shaping system of claim 5, further comprising a feeding device, wherein the feeding device comprises a feeding station for placing the workpiece to be shaped, the feeding device further comprises a detection station, and the detection station is provided with a third sensor for detecting whether the workpiece needs to be shaped.
7. The thermal shaping system of claim 1, wherein the cooling device comprises a conveyor belt and a cooling mechanism disposed on the conveyor belt, the cooling mechanism comprising a spray mechanism or an air blowing mechanism.
8. The thermal shaping system of claim 1, wherein the hot pressing temperature and dwell time of the workpiece after it is placed in the cavity are predetermined to accommodate different workpieces.
9. A method of thermal shaping, comprising:
placing a workpiece on at least one thermal shaping device through a manipulator for thermal shaping, wherein the at least one thermal shaping device is sequentially arranged around the manipulator along the clockwise direction or the anticlockwise direction, the thermal shaping device comprises an upper die and a lower die which are oppositely arranged up and down, the upper die and the lower die are assembled to form a cavity so as to press and shape the workpiece to be shaped, which is placed in the cavity, and the thermal shaping device further comprises a heating mechanism connected with the upper die and/or the lower die, and the heating mechanism can heat the upper die and/or the lower die to a preset temperature so as to thermally shape the workpiece pressed in the cavity;
and taking out at least one workpiece shaped by the at least one thermal shaping device through the manipulator, and cooling and forming the workpiece through a cooling device.
10. The method of claim 9, further comprising pre-pressing the workpiece, wherein the pre-pressing occurs before or simultaneously with the hot press softening deformation of the workpiece.
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