CN112191478A - Drying furnace for automobile coating - Google Patents
Drying furnace for automobile coating Download PDFInfo
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- CN112191478A CN112191478A CN202010899984.7A CN202010899984A CN112191478A CN 112191478 A CN112191478 A CN 112191478A CN 202010899984 A CN202010899984 A CN 202010899984A CN 112191478 A CN112191478 A CN 112191478A
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- 238000001035 drying Methods 0.000 title claims abstract description 141
- 239000011248 coating agent Substances 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 title claims abstract description 18
- 230000000630 rising effect Effects 0.000 claims abstract description 15
- 238000004321 preservation Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims description 19
- 230000007306 turnover Effects 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000003973 paint Substances 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- Drying Of Solid Materials (AREA)
Abstract
The invention relates to coating and drying equipment for an automobile production line, in particular to an automobile coating and drying furnace. The drying furnace comprises a furnace body, a tunnel type drying channel is arranged inside the furnace body, the drying channel comprises a temperature rising area, a heat preservation area and a cooling area, a conveying device penetrating through the channel is arranged in the drying channel, at least one row of hot air nozzles are respectively arranged on the middle upper portions of the drying channel on two sides of the temperature rising area, bottom drying openings extending from the lower direction to the upper side in an inclined mode and facing the lower vehicle body threshold direction of a vehicle shell to be dried are arranged on the lower portions of the drying channel on the two sides of the temperature rising area, and the bottom drying openings extend from the starting end of the temperature rising area to the tail ends of the temperature rising area, the heat preservation area and the cooling area along the conveying. The invention can quickly dry and solidify the electrophoretic paint and the sprayed paint on the complex structure of the bottom, thereby improving the drying efficiency. By using the invention, no matter new drying furnace equipment is manufactured or the existing drying furnace equipment is modified, the original scheme is not required to be greatly modified, thereby saving the equipment investment.
Description
Technical Field
The invention relates to coating and drying equipment for an automobile production line, in particular to an automobile coating and drying furnace.
Background
Along with the development of social economy and the improvement of living standard of people, the demand of China for automobiles is greatly increased for a long time, and along with the long-term forward world automobile output of China, because automobile manufacturing belongs to high-end manufacturing industry, highly automated production lines are arranged on various automobile fields, wherein in the processing of automobile shells, the shells are subjected to electrophoresis, paint spraying and drying after being formed, so that the paint surface is solidified on the surfaces of the automobile shells. In the above steps, the drying process is generally performed in a dedicated drying furnace, such drying furnace generally comprises a furnace body with a tunnel type channel, the furnace body generally comprises a temperature rising area, a heat preservation area and a forced cooling area, a conveying mechanism for continuously conveying the vehicle shell through the channel is arranged in the furnace body, hot air nozzles are arranged in the middle and upper parts of two sides of the furnace body, the hot air nozzles blow hot air into the furnace body, and the part opposite to the hot air nozzles can be rapidly dried through the hot air, so that the temperature of circulating air in the furnace body can be increased, and the area not covered by the nozzles can be dried. However, in the area not covered by the nozzle, the top of the vehicle body shell is a large smooth surface, and the drying can be better performed due to the combination of higher furnace temperature and the help of the circulating airflow, but in the lower part of the vehicle body threshold, wheel arch and other parts of the vehicle body shell, the shape structure is not regular, the strength of the bottom hot circulating airflow is weak, and particularly in the production of more and more electric vehicles at present, a large amount of high-strength steel plates are connected to the inner side of the vehicle body threshold for mounting batteries so as to enhance the strength of the vehicle body bottom plate, so the drying is more difficult.
In order to solve the above problems, the existing manufacturers generally have several ways to solve the problems as follows:
1. the passing time of the car shell in the furnace body is prolonged by prolonging the length of the furnace body, so that the heating time of the car shell is prolonged, and the aim of completely drying the paint surface is fulfilled. The cost of retrofitting is extremely large. In addition, the upper part and the middle part of the car shell do not have the requirement of heating or cooling for a longer time, and more energy is wasted by means of prolonging the furnace body;
2. the passing time of the car body in the furnace body is increased by reducing the passing speed of the car body in the furnace body, so that the heating time of the car body is prolonged, although the furnace body is not required to be changed or replaced, the running efficiency of the whole production line is reduced, the production capacity of a workshop is reduced, and huge waste of production cost of production equipment, personnel and the like is caused during batch continuous processing;
disclosure of Invention
The invention provides a vehicle coating drying oven which does not need to invest a large amount of modification cost and reduce the processing efficiency.
This drying furnace includes the furnace body, and the inside stoving passageway that has a tunnel type of furnace body, including heating-up area, heat preservation district and cooling space in the stoving passageway, have a conveyor who passes this stoving passageway in the stoving passageway, are provided with at least one line hot air nozzle, its characterized in that respectively on the well upper portion of the stoving passageway of heating-up area and heat preservation district both sides: the lower parts of the drying channels on the two sides are provided with bottom drying openings which extend from the lower part to the upper part in an inclined way and face to the lower body threshold direction of the car shell to be dried, and the bottom drying openings extend from the initial end of the temperature rising area to the tail end of the heat preservation area or the cooling area along the conveying direction of the conveying device.
Preferably, the two side bottoms of the drying channel are respectively provided with a hollow boss which extends inwards from the two side bottoms of the drying channel to be close to the conveying device, the bottom drying opening is arranged in the hollow boss, and the hollow boss is provided with a hot air channel for conveying hot air into the bottom drying opening.
Preferably, the bottom drying opening is provided with an opening section and a closing section which can move according to the operation of the dried object, before the part to be dried enters the furnace body, whether the part to be dried is the part needing strengthening drying at the lower part is judged, after the part to be dried enters the drying channel of the furnace body, the opening section dynamically follows the part to be dried to advance along the drying furnace through the adjustment of an operation switch; when the drying component is judged not to be reinforced at the lower part, the closed section dynamically follows the component and the interval between the components to advance along the drying furnace through the adjustment of the control switch.
Preferably, the bottom drying opening is provided with a plurality of openable and closable baffles side by side, each openable and closable baffle is connected with an opening and closing driving structure for driving the openable and closable baffle, the opening section is formed after a plurality of adjacent openable and closable baffles are opened, and the closing section is formed after a plurality of adjacent openable and closable baffles are closed.
Preferably, the openable baffle is hinged to the airflow inlet surface or the airflow outlet surface of the bottom drying opening, the openable baffle can be turned along the hinged position to shield or open the bottom drying opening, and the opening and closing driving structure is a turning driving mechanism for driving the openable baffle to turn.
Preferably, the turnover driving mechanism includes a horizontally reciprocable supporting rod acting on the openable and closable shutter, and an eccentric wheel assembly driving the supporting rod to reciprocate.
Preferably, the eccentric wheel assembly comprises an eccentric wheel pushing the supporting rod towards the direction of the baffle plate and an eccentric wheel rotating gear driving the eccentric wheel to rotate, the eccentric wheel rotating gear is connected with a driving control assembly, the driving control assembly comprises a control chain and an operating switch continuously installed on the control chain, and the operating switch is provided with a contact capable of reciprocating to realize clutch with the eccentric wheel rotating gear.
Preferably, the openable baffle is hung on the airflow inlet surface or the airflow outlet surface of the bottom drying opening, the openable baffle can move linearly along the hanging direction to shield or open the bottom drying opening, and the opening and closing driving mechanism is a linear driving mechanism for driving the openable baffle to move linearly.
Preferably, the linear driving mechanism comprises a hook acting on the openable and closable baffle and a rotary lifting shaft assembly drawing the hook to move linearly.
According to the vehicle coating drying oven, the bottom drying openings which extend from the lower part to the upper part in an inclined mode and face to the lower vehicle body threshold direction of the vehicle shell to be dried are arranged at the lower parts of the drying channels at the two sides, when the vehicle shell passes through, hot air is blown to the positions, located at the lower vehicle body threshold of the vehicle shell, through the bottom drying openings, so that spraying on a complex structure of the bottom can be particularly and rapidly dried and solidified, drying efficiency is improved, and no matter new manufacturing equipment or original equipment is modified, the original scheme does not need to be greatly modified.
Drawings
Fig. 1 is a schematic top view of the internal structure of the first and second embodiments;
FIG. 2 is a schematic cross-sectional view illustrating the first embodiment;
FIG. 3 is a schematic cross-sectional structure diagram of a second embodiment;
FIG. 4 is a schematic top view of the third, fourth and fifth embodiments;
FIG. 5 is a schematic view of the overall cross-sectional configuration of the interior of the fourth embodiment with the flapper open;
FIG. 6 is a schematic sectional view showing a shutter driving structure when the shutter of the fourth embodiment is opened;
FIG. 7 is an enlarged view taken at A in FIG. 6;
FIG. 8 is a schematic view of the overall cross-sectional configuration of the interior of the fourth embodiment with the flapper closed;
FIG. 9 is a schematic cross-sectional view of a shutter drive structure of the fourth embodiment with the shutter closed;
FIG. 10 is an enlarged view of FIG. 9 at B;
FIG. 11 is an internal overall cross-sectional view of the fifth embodiment with the flapper open;
FIG. 12 is a schematic sectional view showing a shutter driving structure when the shutter of the fifth embodiment is opened;
FIG. 13 is an enlarged view at C of FIG. 12;
FIG. 14 is a schematic internal cross-sectional view of a fifth embodiment of the flapper shown in its closed position;
FIG. 15 is a schematic sectional view of a damper driving structure when the damper of the fifth embodiment is closed;
FIG. 16 is an enlarged view taken at D in FIG. 15;
fig. 17 is a schematic view of the structure of the flap lift lock.
Detailed Description
As shown in fig. 1, the vehicle coating drying oven in the first embodiment includes an oven body 1, a tunnel-type drying passage 101 is provided inside the oven body 1, the drying passage 101 at least includes a temperature rising region, a heat preservation region and a cooling region, since the drying process is mainly performed in the temperature rising region and the heat preservation region, in this embodiment, the setting condition of the drying structure is described by taking the temperature rising region structure as an example, the heat preservation region may be performed with reference to the temperature rising region structure, and the air duct structure of the cooling region may also be set with reference to the temperature rising region scheme, and the cooling process may be realized by blowing cold air or lower temperature air flow during operation.
The heating area is an area in which the temperature is kept at the temperature required by coating and drying through the input of hot air, the heating area is provided with a conveying device 102 passing through a channel, and the conveying device 102 generally has two forms, namely a conveying belt arranged below and used for supporting objects to be dried to run in the drying channel, and a conveying chain arranged above and used for hanging the objects to be dried to run in the drying channel. In order to facilitate the drying of the bottom of the vehicle shell, a support 103 is further arranged on the conveyor belt to bear the vehicle shell, so that the conveyor belt is prevented from blocking the comprehensive contact hot air at the bottom of the vehicle shell.
In the input of the hot air, as in the conventional drying oven, at least one row of hot air nozzles 104 is required to be respectively arranged at the middle upper parts of the drying passages at both sides of the heating area, in this embodiment, two rows of hot air nozzles are arranged at each side, namely, one row is arranged at the side of each side of the car shell, and one row is also arranged at the obliquely upper part of each side.
The emphasis of this embodiment is that the lower part of the drying tunnel on both sides is provided with a bottom drying opening 201 extending obliquely from below to above and towards the lower body threshold direction of the vehicle shell to be dried, and the bottom drying opening 201 extends from the starting end of the heating zone to the end of the heating zone in the conveying direction of the conveying device. Here, the bottom drying opening 201 is an outlet of a hot air pipeline, and when the hot air pipeline is connected to an original hot air input pipeline, hot air flow can be input from the bottom drying opening to the lower body threshold direction of the vehicle shell, so as to assist the drying of the part. Set up bottom stoving opening to follow the initial end department of rising temperature zone and start to extend to the terminal linear structure that link up in heat preservation district and forced cooling district along conveyor's direction of delivery, and not add the nozzle in addition in the bottom because when reforming transform for current equipment, the structure of addding the nozzle needs to install a large amount of structural component, need carry out a large amount of improvement operations such as drilling, pipeline and valve body connection to the furnace body in addition, has increased material cost and operating cost.
In order to solve the problem, the second embodiment is further provided based on the first embodiment, in the second embodiment, the bottom of the drying channels at both sides of the temperature rising zone are respectively provided with a hollow boss 203 extending inwards from the drying channel to approach the conveying device, the bottom drying opening 201 is arranged in the hollow boss 203, and the inner cavity 202 of the hollow boss 203 is used as a hot air channel for conveying hot air into the bottom drying opening 201.
In the first and second embodiments described above, since the bottom drying opening 201 is a linear through opening, therefore, when the pressure value of the inputted hot air is equal, the pressure value of the outputted hot air of the bottom drying opening 201 is greatly reduced compared with the nozzle, the blowing wind force applied to the portion of the bottom of the vehicle shell A to be dried is also reduced, in the process, the blank area between the vehicle shell and objects B which do not need to be dried at the bottom, so that a large number of ineffective output sections exist in the bottom drying opening, the output efficiency of the effective output sections is reduced, the effective output end dynamically changes along with the conveying of the car shell, and a third embodiment is further provided on the basis of the second embodiment in order to dynamically adjust the effective output section, improve the operation efficiency of the equipment and effectively dry the bottom by using hot air.
In the third embodiment, the bottom drying opening 201 is provided with an opening section 2011 and a closing section 2012 which can move according to the operation of the dried object, before the part to be dried enters the furnace body, whether the part to be dried needs to be reinforced is judged, after the part to be dried is judged to be reinforced, and after the part to be dried enters the drying channel of the furnace body, the opening section 2011 moves along with the part to be dried; if it is determined that the drying component is not to be reinforced at the lower part, the closing section 2012 runs along the component and the space between the components. After the technical scheme of the third embodiment is adopted, the components needing bottom drying, such as the car shell A enters the furnace body, the opening section moves along with the running of the car shell, the bottom of the car shell is ensured to be always subjected to auxiliary drying by hot air, and when the interval area between the conveying components and the input components do not need bottom auxiliary drying, such as the object B, the bottom drying openings of the two parts are dynamically sealed, so that the air flow strength of the opening section is ensured, and the drying efficiency is improved.
First, there are many implementation methods for the dynamic operation of the opening section and the closing section, and the following describes two implementation methods in detail through the fourth and fifth embodiments to achieve the technical principle and effect proposed in the third embodiment.
First, there is a common point between the fourth embodiment and the fifth embodiment, that is, a plurality of openable/closable baffles are arranged side by side on the bottom drying opening, each openable/closable baffle is connected to an opening/closing driving structure for driving the openable/closable baffle, the opening section is formed by opening a plurality of adjacent openable/closable baffles, and the closing section is formed by closing a plurality of adjacent openable/closable baffles. For example, the length of the car shell is 5 meters, the length of the bottom drying opening is 20 meters, 100 openable baffles cover the bottom drying opening, the width of each openable baffle is 20 centimeters, the openable baffles are numbered as D1, D2 and D3 … D100 once along the running direction, when the car shell just enters the furnace body, the D1 is opened, the rest openable baffles are completely closed, the D2 and the D3 … are sequentially opened along with the continuous conveying of the car shell until the car shell completely enters the furnace body, the D1-D25 are all opened, an opening section with five meters is just provided, then the car shell continues to run, at the moment, the D26 and the D1 are opened, and by analogy, the D27 and the D2 are opened, until the furnace body … D98, the D99 and the D100 are sequentially closed along with the output of the car body, and then the opening section and the closing section of the conveying dynamics of the car shell are dynamically adjusted. The dynamic drying process of the single car shell passing through the furnace body is characterized in that the dynamic drying process can be processed by referring to the process when a plurality of car shells are arranged in the furnace body or objects which are not required to be dried at the bottom are mixed in the middle of the furnace body, gaps among the parts are treated by drying at the bottom, the objects can be identified and judged before entering the furnace body, and a sensor can be arranged in the furnace body to sense the objects and the gap condition. The technical solutions of the fourth embodiment and the fifth embodiment are explained in detail below by specific configurations.
As shown in fig. 4 to 10, in the fourth embodiment, the openable/closable flap 301 is hinged to the airflow inlet surface or the airflow outlet surface of the bottom drying opening 201, the openable/closable flap 301 can be turned over along the hinged portion to block or open the bottom drying opening 201, and the opening/closing driving mechanism is a turning driving mechanism for driving the openable/closable flap to turn over.
And, the turnover driving mechanism includes a horizontally reciprocating rod 302 acting on the openable and closable stopper, and an eccentric wheel assembly 303 driving the rod to reciprocate.
The baffle 301 is fixed on the baffle fixing shaft 304, and the baffle 301 can rotate up and down around the baffle fixing shaft 304 to realize opening and closing of the bottom drying opening 201. The opening or closing of the shutter 301 is performed by a manipulation switch 306 installed on the control chain 305, and the opening or closing state of the shutter 301 is automatically performed according to a signal of the workpiece recognized by the workpiece recognition device 307. The baffle 301 is designed to be angled slightly downward to automatically block the nozzle under the force of gravity. The baffles 301 are arranged in series to ensure that the baffles 301 are well sealed.
the rotation of the eccentric 308 is realized by rotating the eccentric rotating gear 309, and the rotating eccentric rotates 180 degrees, so that the supporting rod 302 can be pushed towards the baffle 301 to jack the baffle 301. At this time, the bottom drying opening 201 is opened, and heat is blown to the bottom of the body sill. The eccentric wheel is rotated for 180 degrees again, the supporting rod 302 is reset downwards under the action of the gravity and the wind pressure of the baffle plate, the baffle plate 301 closes the bottom drying opening 201 downwards, the bottom drying opening 201 is closed, heat is not blown to the automobile body any more, and therefore the wind pressure at other openings is improved. The supporting rods 302 reciprocate under the thrust of the eccentric 308 and the gravity of the baffle 301 to realize the opening and closing control of the baffle 301, and in order to prevent the supporting rods 302 from deviating in the reciprocating motion, limiting mechanisms can be arranged on two sides of each supporting rod 302 to keep the accurate reciprocating motion state.
The eccentric wheel rotating gear 309 is used for driving the eccentric wheel 308 to rotate by controlling the thrust of the control switch 306. The control switch 306 has a shifting block 3061 which can reciprocate to act on or avoid the gear teeth of the eccentric wheel rotating gear 309, when the shifting block is shifted into the gear teeth of the eccentric wheel rotating gear 309, the control switch 306 drives the eccentric wheel rotating gear 309 along with the movement of the control chain 305, so that the baffle is switched between an opening state and a closing state, when the shifting block leaves the gear teeth of the eccentric wheel rotating gear 309, the passage of the control switch 306 does not trigger the eccentric wheel rotating gear 309 to rotate, and the baffle is kept closed.
The supporting rod 302 is used for ejecting the baffle 301 to open the bottom drying opening 201, the supporting rod 302 is required to be capable of automatically resetting and is required to be capable of automatically retracting when not pushed by an eccentric wheel, the supporting rod 302 can be normally reset by the aid of gravity of the openable baffle 301 when the baffle 301 is loosened, and other structures such as a reset spring and the like can also be adopted.
In the rotation control of the eccentric wheel rotating gear 309, a control chain 305 is adopted in the embodiment, and an operation switch 306 is installed on the control chain 305 for operating the eccentric wheel rotating gear 309 to rotate, so as to realize the opening or closing state of the baffle. The opening and closing of the bottom drying opening 201 is realized. The control chains 305 are installed on two sides in the drying oven, are driven by special control chain driving devices 310 and circularly run in the drying oven in a circular shape, and the running speed of the control chains 305 is the same as that of the workpiece, so that the effect that the opened nozzles and the sprayed heat synchronously advance along with the workpiece in the drying oven is achieved. The control chain 305 may be formed by adding an operation switch to a drive chain of an existing workpiece conveying line, or may be formed by separately providing a circulating chain with an operation switch, and the operation speed of the circulating chain is synchronized with the workpiece conveying speed.
And the control chain driving device 310 is used for driving the control chain 305 to circularly operate in the drying oven. Generally, the driving structure comprises a motor, a speed reducing mechanism and a chain wheel.
The above-mentioned operating switch 306 is mounted on the control chain 305. If the operating switch 306 is fixedly mounted on the control chain 305, there are two states, active and inactive, when active, the contact point on the operating switch 306 contacts the eccentric wheel rotating gear 309 to achieve the effect of combining and driving it to rotate, and when inactive, the contact point is separated from the eccentric wheel rotating gear 309, the control chain does not transmit power to the eccentric wheel rotating gear 309.
And a control switch adjusting device 311 installed at the entrance of the drying oven, for adjusting the state (on or off) of the control switch according to the production information of the workpiece read by the workpiece recognizing apparatus 307.
The workpiece recognition device 307 reads production information of the workpiece, and transmits control information to the manipulation switch adjustment device 311 through the control cable so as to be used for adjusting the state of the manipulation switch 306.
And a control cable 312 for transmitting the workpiece information read by the workpiece recognition device 307 to the control switch adjustment device 311 so as to adjust the state of the operation switch and control the opening and closing of the shutter.
The control chain driving device 310 drives the control chain 305 to circulate in the drying oven at the same speed as the operation speed of the workpiece in the drying oven, so that the nozzle and the sprayed heat are synchronized with the operation speed of the vehicle body after being adjusted by the intelligent drying oven control device.
Referring to fig. 4 and 11 to 16, in a fifth embodiment, the openable and closable baffle 301 is hung on an airflow inlet surface or an airflow outlet surface of the bottom drying opening 201, the openable and closable baffle 301 can move linearly along a hanging direction to shield or open the bottom drying opening 201, and the opening and closing driving mechanism is a linear driving mechanism 4 for driving the openable and closable baffle to move linearly.
The linear driving mechanism 4 includes a hook 41 acting on the openable/closable shutter and a rotary lift shaft assembly 42 drawing the hook to move linearly.
The rotary lifting assembly 42 includes a fixed seat 421 with an inclined curved surface and a rotary gear 422 with an inclined curved surface, the middle of the rotary gear 422 with an inclined curved surface is provided with a lifting shaft 423, the rotary gear 422 with an inclined curved surface drives the lifting shaft 423 to lift when rotating, and the hook 41 is installed on the lifting shaft 423. The inclined curved surfaces of the seat 41 and the inclined curved rotary gear 422 may be spiral curved surfaces that are matched with each other.
The fifth embodiment is substantially the same as the fourth embodiment in driving the oblique curved surface rotating gear, and includes that a control chain 305 is adopted in the embodiment, and a control switch 306 'is installed on the control chain 305, because of the difference of the triggering positions, compared with the fourth embodiment, the control switch 306' of the embodiment is only a telescopic electromagnetic switch, and has a telescopic contact 3061 'for controlling the eccentric rotating gear 309 to rotate when extending out, and the telescopic contact 3061' does not contact the eccentric rotating gear 309 when retracting, so as to realize the opening or closing state of the baffle plate, and realize the opening and closing of the bottom drying opening 201. The control chains 305 are installed on two sides in the drying oven, are driven by special control chain driving devices 310 and circularly run in the drying oven in a circular shape, and the running speed of the control chains 305 is the same as that of the workpiece, so that the effect that the opened nozzles and the sprayed heat synchronously advance along with the workpiece in the drying oven is achieved.
In addition, a way of keeping the opening state of the baffle plate without operating the switch 306' is also provided, namely, a notch is arranged at the top end of the seat body 421, a convex block is arranged on the inclined curved surface rotating gear 422, and after the baffle plate is lifted, the notch and the convex block form a locking matching structure 424. At this point, the free fall of the blind due to gravity is interrupted by the locking engagement structure 424, which keeps it open, and the blind is released from the lock by exerting a counterforce on it when it is desired to lower it.
And the control chain driving device 310 is used for driving the control chain to circularly operate in the drying oven.
The above-mentioned operating switch 306 is mounted on the control chain 305. If the control switch 306' is fixedly arranged on the control chain 305, the control switch has two states of activation and deactivation, and when the control switch is activated, the control switch 306 only has two states of opening or closing; if the control switch 306 is detachably mounted on the control chain 305, it is only opened or closed during installation. When not needed, the device is in a separated state.
And a control switch adjusting device 311 installed at the entrance of the drying oven, for adjusting the state (on or off) of the control switch according to the production information of the workpiece read by the workpiece recognizing apparatus 307.
The workpiece recognition device 307 reads production information of the workpiece, and transmits control information to the manipulation switch adjustment device 311 through the control cable so as to be used for adjusting the state of the manipulation switch 306.
And a control cable 312 for transmitting the workpiece information read by the workpiece recognition device 307 to the control switch adjustment device 311 so as to adjust the state of the operation switch and control the opening and closing of the shutter.
The control chain driving device 310 drives the control chain 305 to circulate in the drying oven at the same speed as the operation speed of the workpiece in the drying oven, so that the nozzle and the sprayed heat are synchronized with the operation speed of the vehicle body after being adjusted by the intelligent drying oven control device.
The dynamic adjustment of the opening section and the closing section is realized through the combined control of the openable baffle plates in the fourth embodiment and the fifth embodiment, so that the effective air outlet area of the drying opening at the bottom just corresponds to the passing car shell, and the other parts are kept in a closed state along with the dynamic change of the car shell, thereby greatly improving the air flow strength of the opening section, greatly improving the drying efficiency of the bottom of the car shell, improving the utilization rate of heat energy and saving resources. Meanwhile, the manufactured or transformed part has a simple structure, is convenient to control and implement, and reduces the investment cost.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. Car application drying furnace, including the furnace body, the inside stoving passageway that has a tunnel type of furnace body, including heating-up area, heat preservation district and cooling space in the stoving passageway, has a conveyor who passes this stoving passageway in the stoving passageway, is provided with at least one line hot air nozzle, its characterized in that respectively on the well upper portion of the stoving passageway of heating-up area and heat preservation district both sides: the lower parts of the drying channels on the two sides are provided with bottom drying openings which extend from the lower part to the upper part in an inclined way and face to the lower body threshold direction of the car shell to be dried, and the bottom drying openings extend from the initial end of the temperature rising area to the tail end of the heat preservation area or the cooling area along the conveying direction of the conveying device.
2. The automotive coating drying oven of claim 1, characterized in that: the bottom drying opening is arranged in the hollow boss, and the hollow boss is provided with a hot air channel for conveying hot air to the bottom drying opening.
3. The automotive coating drying oven of claim 1, characterized in that: the bottom drying opening is provided with an opening section and a closing section which can move according to the operation of the dried object, before the part to be dried enters the furnace body, whether the part to be dried is the part needing strengthening drying at the lower part is judged, after the part to be dried is judged to be the part needing strengthening drying at the lower part and enters the drying channel of the furnace body, the opening section dynamically follows the part to be dried to move forward along the drying furnace through the adjustment of an operation switch; when the drying component is judged not to be reinforced at the lower part, the closed section dynamically follows the component and the interval between the components to advance along the drying furnace through the adjustment of the control switch.
4. The automotive coating drying oven of claim 3, characterized in that: the bottom stoving opening on be provided with a plurality of baffles that can open and shut side by side, every baffle that can open and shut is connected with the drive structure that opens and shuts of this baffle that can open and shut of a drive, the opening section form after opening by a plurality of adjacent baffles that can open and shut, the closed section form after being closed by a plurality of adjacent baffles that can open and shut.
5. The automotive coating drying oven of claim 4, characterized in that: the openable baffle is hinged to the airflow inlet surface or the airflow outlet surface of the bottom drying opening, the openable baffle can be turned along the hinged position to shield or open the bottom drying opening, and the opening and closing driving structure is a turning driving mechanism for driving the openable baffle to turn.
6. The automotive coating drying oven of claim 5, characterized in that: the turnover driving mechanism comprises a supporting rod which acts on the openable baffle and can horizontally reciprocate and an eccentric wheel component which drives the supporting rod to reciprocate.
7. The automotive coating drying oven of claim 6, characterized in that: the eccentric wheel assembly comprises an eccentric wheel for pushing the supporting rod towards the direction of the baffle and an eccentric wheel rotating gear for driving the eccentric wheel to rotate, the eccentric wheel rotating gear is connected with a driving control assembly, the driving control assembly comprises a control chain and a control switch continuously installed on the control chain, and a contact capable of realizing the clutch with the eccentric wheel rotating gear through reciprocating motion is arranged on the control switch.
8. The automotive coating drying oven of claim 4, characterized in that: the openable baffle is hung on the airflow inlet surface or the airflow outlet surface of the bottom drying opening, the openable baffle can move linearly along the hoisting direction to shield or open the bottom drying opening, and the opening and closing driving mechanism is a linear driving mechanism for driving the openable baffle to move linearly.
9. The automotive coating drying oven of claim 7, characterized in that: the linear driving mechanism comprises a hook acting on the openable baffle and a rotary lifting shaft assembly for drawing the hook to do linear motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010899984.7A CN112191478A (en) | 2020-08-31 | 2020-08-31 | Drying furnace for automobile coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010899984.7A CN112191478A (en) | 2020-08-31 | 2020-08-31 | Drying furnace for automobile coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112191478A true CN112191478A (en) | 2021-01-08 |
Family
ID=74005116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010899984.7A Withdrawn CN112191478A (en) | 2020-08-31 | 2020-08-31 | Drying furnace for automobile coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112191478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815086A (en) * | 2022-12-19 | 2023-03-21 | 中国第一汽车股份有限公司 | Device for improving flexibility of drying furnace and using method |
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