CN110919799B

CN110919799B - Seamless bending production line for solid wood

Info

Publication number: CN110919799B
Application number: CN201911253804.1A
Authority: CN
Inventors: 朱灵强; 朱振康
Original assignee: Hangzhou Xinnanteng Bamboo Product Co ltd
Current assignee: Hangzhou Xinnanteng Bamboo Product Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2021-06-22
Anticipated expiration: 2039-12-09
Also published as: CN110919799A

Abstract

The invention relates to a solid wood seamless bending production line which comprises a humidifying device, a cutting device, a heating device, a compressing device, a forming device, a mold, a hot air drying device, a microwave drying device and a blending device, wherein the humidifying device is arranged on the bottom of the heating device; the humidifying device comprises a closed humidifying barrel and a water tank; the heating device comprises a closed heating barrel and a first hot air pipe; the compression device comprises a workbench, a pressing device, a fixed block and a first hydraulic cylinder; and a clamping assembly is arranged on the mold. The wood is bent and molded through the humidifying of the humidifying device, the cutting processing of the cutting device, the heating softening of the heating device, the length compression of the compression device, the molding processing of the molding device, the bending and shaping of the mold, the hot air drying of the hot air drying device and the microwave drying of the microwave heating device. The invention improves the utilization rate of wood, enhances the strength of curved parts, and ensures the texture, color and luster effect of the product surface and the paint coating quality.

Description

Seamless bending production line for solid wood

Technical Field

The invention relates to the technical field of wood processing, in particular to a solid wood seamless bending production line.

Background

In traditional Chinese solid wood furniture products, in order to meet the requirements of use functions and aesthetic shapes, various curved members are often seen, such as chair rings, backrest plates, armrests, head rests, upper bars, legs and feet of chair solid wood furniture, which relate to the application of the curved members and are mostly linear curved members. The curved members of solid wood furniture are much more complex to process than the straight members.

The conventional bending process of the solid wood square timber is not suitable for pressing and bending the solid wood square timber into required curved parts, so that in the actual production of the curved parts of the existing solid wood furniture, chair rings, back boards, armrests, lap joints, upper connecting rods, legs, feet and other curved parts in the chair furniture are manufactured, and the traditional sawing method is still adopted, so that the solid wood square timber is usually required to be sawn into curved blanks by a joinery band saw or a wire saw after burdening and scribing, and then the curved blanks are milled and cleaned to be processed into the parts.

However, when solid wood is processed by this method, since a large amount of wood fibers are cut in the transverse direction, the strength of curved parts is reduced, and the curved surface is rough and difficult to paint, so that improvement is required.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a solid wood seamless bending production line, which improves the utilization rate of wood, enhances the strength of curved parts, and ensures the texture, color and luster effect of the surface of a product and the paint coating quality.

The above object of the present invention is achieved by the following technical solutions: a solid wood seamless bending production line comprises a humidifying device for humidifying wood, a cutting device for cutting the wood into blank materials, a heating device for heating and softening the blank materials, a compression device for compressing the blank materials in length, a forming device for processing the blank materials into semi-finished products, a mold for bending the semi-finished products into finished products, a hot air drying device for drying the finished products by hot air and a microwave drying device for drying the finished products by microwave, wherein the humidifying device, the cutting device, the heating device, the compression device, the forming device, the mold, the hot air drying device and the microwave drying device are connected through a blending device; the humidifying device comprises a closed humidifying barrel for placing wood and a water tank connected to the closed heating barrel through a pipeline, wherein a first air pump and a first closed door are installed on the closed humidifying barrel, a water valve is installed on the pipeline, and an opening is formed in the water tank; the heating device comprises a closed heating barrel and a first hot air pipe, a second closed door and a pressure gauge are mounted on the closed heating barrel, and the first hot air pipe is connected to the closed heating barrel through a second air pump; the compression device comprises a workbench for placing wood, a pressing device for pressing the wood on the workbench, a fixing block for abutting against one end of the wood and a first hydraulic cylinder arranged at the other end of the wood, wherein a wood block for knocking the other end of the wood is fixed on a piston rod of the first hydraulic cylinder; and a clamping assembly for clamping and fixing the finished product is arranged on the mold.

By adopting the technical scheme, the wood is placed in the closed humidifying barrel, the closed humidifying barrel is closed through the first sealing door, and then the gas in the closed humidifying barrel is pumped out through the first air pump, so that negative pressure is formed in the closed humidifying barrel; then, a water valve is opened, and because the inside of the closed humidifying barrel is in a negative pressure state, the water body in the water tank is sucked into the closed humidifying barrel, and the gas in the wood is pumped out by the first air pump, so that the water body is conveniently immersed, the permeation efficiency of the water body is improved, and the processing efficiency of the wood is greatly improved; and then soaking the wood for 1 hour to ensure that the humidity of the wood reaches more than 30 percent.

After the wood is soaked for 1 hour, air is fed into the closed humidifying barrel through the first air pump, and water in the closed humidifying barrel is pressed into the water tank, so that the water in the closed humidifying barrel is automatically discharged; and then closing the water valve, and pumping out the gas in the closed humidifying barrel through the first air pump, so that the air pressure in the closed humidifying barrel is consistent with the external atmospheric pressure.

Then opening the first sealed door and taking out the wood, conveying the wood to the cutting device by the blending device, cutting the wood into blank materials by the cutting device, conveying the blank materials to the sealed heating barrel by the blending device, putting the blank materials into the sealed heating barrel, sealing the sealed heating barrel by the second sealed door, introducing 120 ℃ water vapor into the sealed heating barrel by the second air pump, ensuring that the pressure value in the sealed heating barrel is about 0.4Mpa, and heating the blank materials for 1 hour to ensure that the blank materials are heated and softened.

After the blank material is heated for 1 hour, hot air in the sealed heating barrel is pumped out through a second air pump, so that the pressure in the sealed heating barrel is consistent with the external atmospheric pressure, a second sealed door is opened, the heated blank material is taken out, and a blending device conveys wood to a compression device; then placing the blank materials on a workbench to ensure that one end of each blank material is abutted against the fixed block; then compress tightly spacingly with blank material through closing device, first pneumatic cylinder will drive the billet and strike the other end of blank material circularly for the blank material carries out length compression, and the compression ratio is 20%, so that the follow-up bending of blank material.

Continuously maintaining the pressure of the blank material for at least 4 hours by using a compression device, and ensuring that the blank material needs to be cooled to room temperature, so that the wood is not easy to expand; and then taking out the blank material in the compression device, conveying the blank material to a forming device by a blending device, and processing the blank material into a semi-finished product by the forming device.

Then the blending device conveys the semi-finished product to a mould, then the semi-finished product is bent into a finished product and is installed on the mould, and then the finished product is clamped and fixed through a clamping assembly, so that the finished product is bent and shaped; then conveying the mould filled with the finished product to a hot air drying device through a blending device, and placing the mould filled with the finished product into the hot air drying device; and then introducing 65 ℃ hot air into the hot air drying device, drying the finished product in the hot air drying device for 2 days, heating the finished product by the hot air from outside to inside, and controlling the humidity of the finished product to be about 15% after 2 days.

And then taking the mould with the finished product out of the hot air drying device, taking the finished product off the mould, conveying the finished product to a microwave heating device through a blending device, putting the finished product into the microwave heating device, carrying out microwave heating on the finished product for 7 minutes by the microwave heating device, wherein the microwave heating temperature is 65 ℃, and heating the finished product by microwaves from inside to outside so that the humidity of the finished product is 8-12%, and at the moment, bending and shaping the finished product.

The wood is subjected to the humidification of the humidification device, the cutting forming of the cutting device, the heating softening of the heating device, the length compression of the compression device, the forming processing of the forming device, the bending forming of the die, the hot air drying of the hot air drying device and the microwave drying of the microwave heating device, so that the wood is bent and formed, the strength of curve-shaped parts is enhanced, the processing difficulty is reduced, and the utilization rate of the wood is improved; and wood fibers which are transversely cut do not exist on the surface of the wood, so that the texture, color and luster effect and paint coating quality of the wood surface are ensured.

The present invention in a preferred example may be further configured to: the closed humidifying barrel is provided with a pressure sensor and a processor, the pressure sensor, the first air pump and the water valve are all coupled to the processor, when the pressure sensor detects that the pressure value in the closed humidifying barrel is 0.085Mpa, the pressure sensor transmits a sensing signal to the processor, and the processor controls the first air pump to be closed and the water valve to be opened simultaneously.

Through adopting above-mentioned technical scheme, when pressure sensor detected the pressure in the airtight humidification bucket and be 0.085Mpa, pressure sensor will be to treater transmission sensing signal, the treater will control the air pump simultaneously and close and the water valve is opened, be the negative pressure state in the airtight humidification bucket, so the water in the water tank will be inhaled in the airtight humidification bucket, realized that the automation of airtight humidification bucket is intake, and can control the inflow, need not the manual work and control, workman's intensity of labour has been reduced.

The present invention in a preferred example may be further configured to: and a first safety valve is arranged on the closed heating barrel.

By adopting the technical scheme, when the pressure value in the closed heating barrel is higher than 0.4Mpa, the first safety valve can automatically release pressure, so that the safety is ensured; and because of the setting of first relief valve, so first steam pipe can continue to let in vapor in the airtight heating cabinet for the temperature in the airtight heating cabinet keeps about 120 ℃ all the time, thereby has improved the heating efficiency of airtight heating cabinet to timber.

The present invention in a preferred example may be further configured to: the pressing device comprises a support fixed on the workbench, a pressing plate attached to the upper side and the lateral side of the blank, a second hydraulic cylinder driving the pressing plate to compress the blank on the workbench, and a third hydraulic cylinder clamped on the push plate of the blank together with the pressing plate and driving the push plate to support the blank against the pressing plate, wherein the pressing plate is arranged in an L shape, a piston rod of the second hydraulic cylinder extends along the vertical direction and is fixedly connected to the pressing plate, and a piston rod of the third hydraulic cylinder extends along the horizontal direction and is fixedly connected to the push plate.

Through adopting above-mentioned technical scheme, place the workstation with the blank material and make blank material tip conflict in the fixed block after, drive the clamp plate through the second pneumatic cylinder and push down to drive the push pedal motion through the third pneumatic cylinder, the clamp plate will compress tightly the blank material on the workstation, the push pedal will press from both sides tightly in the blank material with the clamp plate jointly, has guaranteed the stability of blank material, makes the difficult bending fracture of blank when being strikeed by the billet circulation.

The present invention in a preferred example may be further configured to: the pressing plate is rotatably connected with a meshing gear, and a rack which extends in the vertical direction and is meshed with the meshing gear is fixed on the support.

Through adopting above-mentioned technical scheme, at the in-process that the clamp plate goes up and down, the meshing gear will rotate on the rack, and the meshing of meshing gear and rack has improved the stability of clamp plate.

The present invention in a preferred example may be further configured to: the four groups of the meshing gears are arranged on the pressing plate and are respectively arranged at the four corners of the pressing plate, and the four groups of the racks are arranged on the bracket and correspond to the meshing gears.

Through adopting above-mentioned technical scheme, the stability in clamp plate four corners has been guaranteed to the cooperation of four groups of meshing gears and four groups of racks to the stability of clamp plate has further been improved.

The present invention in a preferred example may be further configured to: clamping component is including being the splint that "U" shape set up, is equipped with on the splint to supply finished product and mould to inlay the chamber of establishing, supply the first conflict piece, the screw-thread fit of finished product conflict to clamp in mould and off-the-shelf screw thread spare with first conflict piece together of establishing.

Through adopting above-mentioned technical scheme, when making the screw thread spare press from both sides tightly in mould and finished product jointly with first conflict piece through rotatory screw thread spare, the finished product will be locked and fix on the mould for the finished product is by the bending type.

The present invention in a preferred example may be further configured to: the adjusting device connected with the hot air drying device and the microwave drying device is a conveyor belt passing through the microwave drying device.

By adopting the technical scheme, the finished product taken out of the hot air drying device is detached from the die and placed on the conveyor belt, the time required for the finished product to pass through the microwave drying chamber is 7 minutes under the conveying of the conveyor belt, and the humidity of the finished product is kept between 8 and 12 percent after 7 minutes, so that the finished product is completely shaped; due to the arrangement of the conveying belt, finished products do not need to be conveyed into the microwave drying device manually, the drying time is not counted, and the labor intensity of workers is reduced.

In summary, the invention has the following beneficial technical effects:

1. the humidifying device, the heating device, the compressing device, the cutting device, the forming device, the die, the hot air drying device, the microwave drying device and the blending device are arranged, so that the bending forming of wood is realized, the strength of curve-shaped parts is enhanced, the processing difficulty is reduced, the utilization rate of the wood is improved, wood fibers which are transversely cut do not exist on the surface of the wood, and the texture, color and luster effect and the paint coating quality of the surface of the wood are ensured;

2. the arrangement of the pressure sensor, the processor, the first air pump and the water valve realizes the automatic water inlet of the closed humidifying barrel, and can control the water inlet amount without manual operation, thereby reducing the labor intensity of workers;

3. the setting of closing device makes timber compressed tightly on the workstation to press from both sides push pedal and clamp plate jointly tightly, guaranteed ligneous stability, make timber not easy bending fracture when being strikeed by the billet circulation.

Drawings

FIG. 1 is a schematic flow chart of the whole of an embodiment of the present invention;

FIG. 2 is a schematic view showing the structure of a humidifying device in the embodiment of the present invention;

FIG. 3 is a schematic view showing the structure of a heating apparatus in the embodiment of the present invention;

FIG. 4 is a schematic diagram showing the construction of a compressing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the structure of a pressing plate, a pushing plate and a wood block in the embodiment of the invention;

FIG. 6 is a schematic structural view showing a fixing block and a pressing plate in the embodiment of the present invention;

FIG. 7 is a schematic structural view showing a mold in the embodiment of the present invention;

fig. 8 is a schematic diagram showing the structure of the clamping assembly in the embodiment of the present invention.

Reference numerals: 1. a humidifying device; 11. sealing the humidifying barrel; 12. a first air pump; 13. a first airtight door; 14. a pressure sensor; 15. a timer; 16. a processor; 17. a water tank; 18. a pipeline; 19. a water valve; 2. a heating device; 21. sealing the heating barrel; 22. a first hot air pipe; 23. a second airtight door; 24. a pressure gauge; 25. a first safety valve; 26. a second air pump; 3. a compression device; 31. a work table; 311. a fixed block; 312. a metal block; 32. a first hydraulic cylinder; 321. wood blocks; 33. a support; 34. a second hydraulic cylinder; 341. pressing a plate; 35. a third hydraulic cylinder; 351. pushing the plate; 352. a metal plate; 353. a dovetail strip; 354. a dovetail groove; 36. a cross bar; 361. a meshing gear; 362. a first bevel gear; 37. a longitudinal bar; 371. a second bevel gear; 38. a rack; 39. an extension plate; 391. a reinforcing plate; 4. a thicknesser; 5. a round bar machine; 6. a mold; 61. a frame; 62. an arc-shaped plate; 63. a first stopper; 64. a second limiting block; 65. a limiting plate; 66. a fixing plate; 67. a clamping block; 671. a clamping cavity; 68. a clamping assembly; 681. a splint; 682. a cavity is embedded; 683. a first contact block; 684. a screw cylinder; 685. a screw; 686. a second contact block; 687. rotating the rod; 69. weaving a belt; 7. obtaining a finished product; 71. an arc-shaped portion; 72. a first curved portion; 73. a second curved portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a solid wood seamless bending production line comprises a humidifying device 1 for humidifying wood, a cutting device for cutting the wood into rough blanks, a heating device 2 for heating and softening the rough blanks, a compressing device 3 for compressing the rough blanks in length, a forming device for processing the rough blanks into semi-finished products 7, a mold 6 for bending the semi-finished products 7 into finished products 7, a hot air drying device for drying the finished products 7 by hot air, and a microwave drying device for drying the finished products 7 by microwave, wherein the humidifying device 1, the cutting device, the heating device 2, the compressing device 3, the forming device, the mold 6, the hot air drying device and the microwave drying device are connected through allocating devices, and all allocating devices are conveying belts.

As shown in fig. 2, the humidifying device 1 includes a sealed humidifying tank 11 for placing wood, the sealed humidifying tank 11 is communicated with a water tank 17 through a pipeline 18, a water valve 19 is installed on the pipeline 18, and an opening is arranged on the water tank 17. The first air pump 12, the first sealed door 13, the pressure sensor 14, the timer 15 and the processor 16 are installed on the sealed humidifying barrel 11, the pressure sensor 14, the first air pump 12, the water valve 19 and the timer 15 are all coupled to the processor 16, and one end of the pressure sensor 14 extends into the sealed humidifying barrel 11 and is used for detecting the pressure in the sealed humidifying barrel 11.

As shown in fig. 2, firstly, wood is placed in the sealed humidifying barrel 11, the sealed humidifying barrel 11 is sealed by the first sealing door, and then the air in the sealed humidifying barrel 11 is pumped out by the first air pump 12, so that negative pressure is formed in the sealed humidifying barrel 11, and the air in the wood is pumped out by the first air pump 12; when the pressure sensor 14 detects that the pressure in the closed humidifying barrel 11 is 0.085Mpa, the pressure sensor 14 transmits an induction signal to the processor 16, and the processor 16 controls the first air pump 12 to be closed, the water valve 19 to be opened and the timer 15 to be timed at the same time, so that the water in the water tank 17 is sucked into the closed humidifying barrel 11 due to the fact that the interior of the closed humidifying barrel 11 is in a negative pressure state; because the gas in the wood is pumped out, the water body can be conveniently immersed into the wood, and the permeation efficiency of the water body is improved; moreover, automatic water inlet of the closed humidifying barrel 11 is realized, and the water inlet amount can be controlled.

As shown in fig. 2, after the timer 15 counts 1 hour, the humidity of the wood reaches more than 30%, the timer 15 transmits a sensing signal to the processor 16, the processor 16 controls the first air pump 12 to be turned on and the timer 15 to be turned off simultaneously, the first air pump 12 admits air into the sealed humidifying cylinder 11 and presses the water in the sealed humidifying cylinder 11 into the water tank 17, so that the automatic discharge of the water in the sealed humidifying cylinder 11 is realized; when the pressure sensor 14 detects that the pressure value in the closed humidifying barrel 11 is 0.2Mpa, the pressure sensor 14 transmits an induction signal to the processor 16, the processor 16 controls the first air pump 12 and the water valve 19 to be closed at the same time, and most of the water in the closed humidifying barrel 11 is discharged; and then, the first air pump 12 is used for decompressing the closed humidifying barrel 11, so that the air pressure in the closed humidifying barrel 11 is consistent with the external atmospheric pressure, and the wood is conveyed to the cutting device through the conveying belt.

As shown in fig. 1, the cutting device is a thicknesser 4 (not shown in the figure), and the thicknesser 4 is a prior art, so the details thereof are not repeated herein; the thicknesser 4 will cut the wood both width and height to give a blank with a square cross-section, in this example the cross-sectional dimension of the wood is 35 mm. After the wood is cut into blanks, the wood is transported to the heating device 2 by means of a conveyor belt.

As shown in fig. 3, the heating apparatus 2 includes a sealed heating tub 21 and a first hot air pipe 22, a second sealed door 23, a pressure gauge 24 and a first safety valve 25 are installed on the sealed heating tub 21, and the first hot air pipe 22 is connected to the sealed heating tub 21 by a second air pump 26. Firstly, putting the blank into a closed heating barrel 21, then closing the closed heating barrel 21 through a second closed door 23, then continuously introducing 120 ℃ water vapor into the closed heating barrel 21 through a first hot air pipe 22 and a second air pump 26 to ensure that the pressure value in the closed heating barrel 21 is about 0.4Mpa, and heating the blank for 1 hour to ensure that the blank is heated and softened; when the pressure value in the closed heating barrel 21 is higher than 0.4Mpa, the first safety valve 25 will automatically release the pressure, so as to ensure the safety.

After the blank is heated in the closed heating barrel 21 for 1 hour, the second air pump 26 reversely pumps out the water vapor in the closed heating barrel 21, so that the pressure in the closed heating barrel 21 is consistent with the external atmospheric pressure, and then the blank is conveyed to the compressing device 3 through the conveyor belt.

As shown in fig. 4 and 5, the compressing device 3 includes a workbench 31 for placing blank materials, a fixing block 311, a first hydraulic cylinder 32 and a pressing device, the fixing block 311 (see fig. 6) and the first hydraulic cylinder 32 are both fixed on the workbench 31, and the end portions of all the blank materials are abutted against the fixing block 311 (see fig. 6); the piston rod of the first hydraulic cylinder 32 is the same as the extending direction of the blank, a wood block 321 is fixed on the piston rod of the first hydraulic cylinder 32, and the wood block 321 and the fixing block 311 are respectively arranged at two ends of the blank.

As shown in fig. 5 and 6, the pressing device includes a support 33, a pressing plate 341, a plurality of second hydraulic cylinders 34, a pushing plate 351 and a plurality of third hydraulic cylinders 35, the worktable 31 is fixed on the support 33, the pressing plate 341 is "L" shaped and is attached to the upper side of the blank, piston rods of all the second hydraulic cylinders 34 extend along the vertical direction and are all fixedly connected to the pressing plate 341, piston rods of all the third hydraulic cylinders 35 extend along the horizontal direction and are all fixedly connected to the pushing plate 351, and a metal plate 352 is arranged on one side of the pressing plate 341 opposite to the pushing plate 351.

Putting the heated blank material on the workbench 31, enabling the end part of the blank material to abut against the fixed block 311, driving the pressing plate 341 to press downwards through the second hydraulic cylinder 34, driving the pushing plate 351 to move through the third hydraulic cylinder 35, enabling the pressing plate 341 to tightly press the blank material on the workbench 31, and clamping the two groups of metal plates 352 on the blank material together; then, the first hydraulic cylinder 32 drives the wood block 321 to circularly knock the end part of the blank, so that the blank can be subjected to length compression, and the compression ratio is 20% to facilitate the subsequent bending of the blank; in this example the length of the blank is 2 metres and after compression the length is 1.6 metres. And then continuously maintaining the pressure of the blank material for at least 4 hours so as to facilitate the compression and the shaping of the blank material and ensure that the blank material needs to be cooled to room temperature, so that the blank material is not easy to expand.

As shown in fig. 5 and 6, dovetail strips 353 arranged along the extending direction of the blank are fixed on the opposite sides of the pressing plate 341 and the pushing plate 351, and dovetail grooves 354 for slidably embedding the corresponding dovetail strips 353 are formed on the two groups of metal plates 352. Therefore, in the process of the wood block 321 circularly knocking the hair blank, the length of the hair blank is gradually compressed, and the two groups of metal plates 352 are also knocked by the wood block 321 and move along the horizontal direction; because the two sides of the blank will produce huge extrusion force when the blank is compressed, and the two groups of metal plates 352 will move synchronously with the blank, the blank is compressed conveniently, the energy consumption is reduced, and the side parts of the blank are not easy to be worn.

As shown in fig. 5 and 6, the upper side of the pressing plate 341 is rotatably connected with two sets of transverse rods 36 and two sets of longitudinal rods 37, the two sets of transverse rods 36 and the two sets of longitudinal rods 37 both extend along the horizontal direction and the extending direction is perpendicular, the two ends of the two sets of transverse rods 36 are both fixedly sleeved with engaging gears 361, the bracket 33 is fixed with four sets of racks 38 engaged with the corresponding engaging gears 361, and all the racks 38 extend along the vertical direction. Therefore, in the lifting process of the pressing plate 341, the meshing gear 361 will be meshed with the rack 38 and rotate on the rack 38, thereby improving the stability of the pressing plate 341.

As shown in fig. 5 and 6, two ends of the two groups of transverse rods 36 are fixedly sleeved with first bevel gears 362, and two ends of the two groups of longitudinal rods 37 are fixedly provided with second bevel gears 371 meshed with the corresponding first bevel gears 362. Therefore, in the lifting process of the pressing plate 341, due to the arrangement of the cross bar 36, the two sets of meshing gears 361 on the same cross bar 36 will rotate synchronously; in the rotating process of the cross rod 36, the cross rod 36 drives the first bevel gear 362 to rotate, the first bevel gear 362 causes the second bevel gear 371 to rotate, and due to the arrangement of the longitudinal rods 37, the two groups of second bevel gears 371 of the same longitudinal rod 37 synchronously rotate, so that the synchronous rotation of the two groups of cross rods 36 is ensured, and the stability of the pressing plate 341 is further improved.

As shown in fig. 6, an extension plate 39 is integrally formed on one side of the pressing plate 341 away from the push plate 351, and a plurality of reinforcing plates 391 are fixed between the extension plate 39 and the pressing plate 341, so that the strength of the pressing plate 341 is improved; a plurality of metal blocks 312 sequentially arranged along the extension direction of the pressing plate 341 are fixed on the workbench 31, and when the pressing plate 341 is pressed on the blank material, one side of the pressing plate 341 far away from the pushing plate 351 will abut against all the metal blocks 312, so that after the blank material is pressed on the pressing plate 341 by the pushing plate 351, the pressing plate 341 is not easy to deform.

And after the pressure of the blank material is maintained for more than 4 hours, taking out the blank material and conveying the blank material to a forming device through a conveying belt. The forming device is a round bar machine 5, and the round bar machine 5 is the prior art, so the description is omitted; the round bar machine 5 processes the blank into round bars of the desired diameter, the cross-sectional diameter of the semifinished product 7 being 30mm in this example. After the blank material is formed into the semi-finished product 7, the semi-finished product 7 is conveyed to the mould 6 through the conveyor belt.

As shown in fig. 7 and 8, the finished product 7 comprises an arc-shaped portion 71, two sets of first curved portions 72 and two sets of second curved portions 73; the die 6 comprises a frame 61 for attaching the finished product 7, wherein an arc-shaped plate 62, two groups of first limiting blocks 63 arranged at two sides of the finished product 7, two groups of second limiting blocks 64 arranged at two sides of the finished product 7 and two groups of limiting plates 65 are fixed on the surface of the frame 61; the arc-shaped part 71 is attached to the arc-shaped plate 62 and used for bending and shaping the arc-shaped plate 62; the two groups of first limiting blocks 63 respectively abut against the corresponding first bending parts 72, the two groups of second limiting blocks 64 respectively abut against the corresponding first bending parts 72, and the two groups of first limiting blocks 63 and the two groups of second limiting blocks 64 are used for bending and shaping the two groups of first bending parts 72; the two groups of limiting plates 65 are both arranged in an L shape and respectively abut against the corresponding second bending portions 73, so that the second bending portions 73 are bent and shaped, and the second bending portions 73 are not easy to tilt.

As shown in fig. 7, a fixing plate 66 is disposed on one side of the mold 6, two sets of L-shaped clamping blocks 67 are fixed on the fixing plate 66, and the two sets of clamping blocks 67 and the fixing plate 66 enclose a clamping cavity 671 for clamping the same frame 61. Before the semi-finished product 7 is bent, the frame 61 is clamped into the clamping cavity 671, so that the integral stability of the die 6 is ensured; then, the semi-finished product 7 is manually bent and attached to the mold 6, and the semi-finished product 7 can be bent and shaped into a finished product 7.

As shown in fig. 7 and 8, the mold 6 is provided with a plurality of clamping assemblies 68 for clamping and fixing the finished product 7, all the clamping assemblies 68 have the same structure, each clamping assembly 68 includes a clamping plate 681 in a "U" shape, and the clamping plate 681 defines an embedding cavity 682 for embedding the finished product 7 and the mold 6; a first contact block 683 and a screw cylinder 684 are respectively fixed on the two groups of inner sides opposite to the clamping plate 681; a screw thread piece is matched with the internal thread of the screw cylinder 684, the screw thread piece is a screw rod 685, and a second contact block 686 is fixed at one end, facing the first contact block 683, of the screw rod 685. The second abutting block 686 abuts against the mold 6 by rotating the screw 685, and the first abutting block 683 abuts against the finished product 7, so that the finished product 7 is clamped and fixed on the mold 6, and the bending and shaping effects of the finished product 7 are improved.

As shown in fig. 8, a rotation rod 687 is fixed to the other end of the screw 685, and the rotation of the screw 685 is facilitated by the rotation rod 687.

As shown in fig. 8, a knitting belt 69 is disposed between the first contact block 683 and the finished product 7, so that the first contact block 683 cannot be directly pressed against the finished product 7, and the finished product 7 is not prone to indentation; meanwhile, because the first contact block 683 has a smaller volume, heat is easy to accumulate on the first contact block 683 when the finished product 7 and the die 6 are heated by the hot gas heating device 2 subsequently, and the braided belt 69 separates the first contact block 683 from the finished product 7, so that the first contact block 683 is not easy to burn black marks on the finished product 7, and the appearance quality of the finished product 7 is ensured.

After the finished product 7 is installed on the mold 6, the mold 6 with the finished product 7 is conveyed to the hot air heating device 2 through a conveyor belt; the hot gas heating device 2 comprises a closed drying room, and a second hot gas pipe is installed on the closed drying room. The mould 6 with the finished product 7 is placed in a closed drying room, hot air at 65 ℃ is introduced into the drying room through a second hot air pipe, the finished product 7 is placed in the drying room for 2 days, the hot air dries the finished product 7 from outside to inside, and after 2 days, the humidity of the finished product 7 is about 15%.

The sealed drying room is also provided with a second safety valve, and when the pressure in the sealed drying room is too high, the second safety valve automatically opens to release the pressure, so that the safety is ensured.

The microwave drying device is a microwave drying machine, and a conveyor belt connected with the closed drying room and the microwave drying machine penetrates through the microwave drying machine. After the die 6 with the finished product 7 is dried in the drying room for 2 days, taking out the die 6, detaching the finished product 7 from the die 6, conveying the finished product 7 into a microwave dryer through a conveyor belt, and drying the finished product 7 by the microwave dryer from inside to outside at a drying temperature of 65 ℃; the finished product 7 takes 7 minutes to pass through the microwave drying chamber under the conveying of the conveyor belt, and after 7 minutes, the humidity of the finished product 7 is kept between 8 and 12 percent, so that the finished product is completely shaped. The finished product 7 has extremely low internal stress, long service life, moisture resistance and difficult deformation, and can reach more than 5 times of common plate-type furniture.

The implementation principle of the embodiment is as follows: firstly, placing wood into a closed humidifying barrel 11, then sealing the closed humidifying barrel 11 through a first sealing door, and then pumping out gas in the closed humidifying barrel 11 through a first air pump 12, so that negative pressure is formed in the closed humidifying barrel 11, and the gas in the wood is pumped out through the first air pump 12; when the pressure sensor 14 detects that the pressure in the closed humidifying barrel 11 is 0.085Mpa, the pressure sensor 14 transmits an induction signal to the processor 16, the processor 16 controls the air pump to be closed, the water valve 19 to be opened and the timer 15 to time at the same time, and the water in the water tank 17 is sucked into the closed humidifying barrel 11 because the inside of the closed humidifying barrel 11 is in a negative pressure state; because the gas in the wood is pumped out, the water body can be conveniently immersed into the wood, and the permeation efficiency of the water body is improved.

After the timer 15 times for 1 hour, the humidity of the wood reaches more than 30%, the timer 15 transmits a sensing signal to the processor 16, the processor 16 controls the first air pump 12 to be started and the timer 15 to be closed simultaneously, the first air pump 12 feeds air into the closed humidifying barrel 11 and presses the water in the closed humidifying barrel 11 into the water tank 17, and automatic discharge of the water in the closed humidifying barrel 11 is realized; when the pressure sensor 14 detects that the pressure value in the closed humidifying barrel 11 is 0.2Mpa, the pressure sensor 14 transmits an induction signal to the processor 16, the processor 16 controls the first air pump 12 and the water valve 19 to be closed at the same time, and most of the water in the closed humidifying barrel 11 is discharged; and then, the first air pump 12 is used for decompressing the closed humidifying barrel 11, so that the air pressure in the closed humidifying barrel 11 is consistent with the external atmospheric pressure, the wood is conveyed to the thicknesser 4 through the conveyor belt, and the width cutting and the height cutting are carried out on the wood through the thicknesser 4, so that the wood becomes a blank with a square cross section.

Firstly, putting the blank into a closed heating barrel 21, then closing the closed heating barrel 21 through a second closed door 23, then continuously introducing 120 ℃ water vapor into the closed heating barrel 21 through a first hot air pipe 22 and a second air pump 26 to ensure that the pressure value in the closed heating barrel 21 is about 0.4Mpa, and heating the blank for 1 hour to ensure that the blank is heated and softened; when the pressure value in the closed heating barrel 21 is higher than 0.4Mpa, the first safety valve 25 automatically releases pressure, so that the safety is ensured; and because the pressure value in the closed heating barrel 21 is 0.4Mpa, and the pressure value of the atmospheric pressure is 0.1Mpa, the efficiency of heating the blank material is improved. After the blank is heated in the closed heating barrel 21 for 1 hour, the second air pump 26 reversely pumps out the water vapor in the closed heating barrel 21, so that the pressure in the closed heating barrel 21 is consistent with the external atmospheric pressure, and then the blank is conveyed to the compressing device 3 through the conveyor belt.

Firstly, putting the heated blank material on the workbench 31, enabling the end part of the blank material to abut against the fixed block 311, then driving the pressing plate 341 to press downwards through the second hydraulic cylinder 34, and driving the pushing plate 351 to move through the third hydraulic cylinder 35, wherein the pressing plate 341 presses the blank material tightly on the workbench 31, and the two groups of metal plates 352 are clamped on the blank material together; then, the first hydraulic cylinder 32 drives the wood block 321 to circularly knock the blank and the end parts of the two groups of metal plates 352, so that the blank is subjected to length compression, and the compression rate is 20% to facilitate the subsequent bending of the blank; because the two sides of the blank will produce huge extrusion force when the blank is compressed, and the two groups of metal plates 352 will move synchronously with the blank, the blank is convenient to compress, and the side parts of the blank are not easy to wear. And then continuously maintaining the pressure of the blank material for at least 4 hours by using the compression device 3, and ensuring that the blank material needs to be cooled to room temperature, so that the blank material is not easy to expand.

And after the pressure of the blank material is maintained for more than 4 hours, taking out the blank material and conveying the blank material to a round bar machine 5 through a conveying belt. The wood is then processed by a rod machine 5 into a semi-finished product 7 of the desired diameter and the semi-finished product 7 is transported by a conveyor to the mould 6.

The frame 61 is clamped into the two clamping cavities 671, the semi-finished product 7 is bent on the mold 6 to form the finished product 7, the arc-shaped portion 71 is attached to the arc-shaped plate 62, the two first bending portions 72 are abutted against the corresponding first limiting block 63 and the second limiting block 64, and the second bending portion 73 is abutted against the corresponding limiting plate 65. Then, the braided strap 69 is attached to the surface of the finished product 7, the clamping plate 681 is moved to enable the mold 6 and the finished product 7 to be in the embedding cavity 682, and then the rotating rod 687 is rotated to drive the screw 685 to move, so that the braided strap 69 is tightly abutted to the finished product 7 by the first abutting block 683, and the second abutting block 686 is tightly abutted to the mold 6, so that the finished product 7 is clamped and fixed on the mold 6, and the bending and shaping effects of the finished product 7 are improved.

And then placing the mould 6 with the finished product 7 in a drying room, introducing 65 ℃ hot air into the drying room, placing the finished product 7 in the drying room for 2 days, and drying the finished product 7 by the hot air from outside to inside, wherein the humidity of the finished product 7 is about 15% after 2 days. Then taking out the die 6, detaching the finished product 7 from the die 6, and conveying the finished product 7 into a microwave dryer through a conveyor belt, wherein the microwave dryer dries the finished product 7 from inside to outside, and the drying temperature is 65 ℃; the finished product 7 takes 7 minutes to pass through the microwave drying chamber under the conveying of the conveyor belt, and after 7 minutes, the humidity of the finished product 7 is kept between 8 and 12 percent, so that the finished product is completely shaped.

The wood is subjected to humidification in the closed humidification barrel 11, cutting forming of the thicknesser 4, heating softening in the closed heating barrel 21, length compression of a wood compressor, forming processing of the round bar machine 5, bending forming of the die 6, hot air drying of a drying room and microwave drying of a microwave drying room, so that the wood is bent and formed, the strength of curved parts is enhanced, the processing difficulty is reduced, and the utilization rate of the wood is improved; and wood fibers which are transversely cut do not exist on the surface of the finished product 7, so that the texture color effect and the paint coating quality of the surface of the finished product 7 are ensured.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a seamless crooked production line of wood which characterized in that: the wood humidifying and drying device comprises a humidifying device (1) for humidifying wood, a cutting device for cutting the wood into blank materials, a heating device (2) for heating and softening blank materials, a compressing device (3) for compressing the blank materials in length, a forming device for processing the blank materials into semi-finished products (7), a mold (6) for bending the semi-finished products (7) into finished products (7), a hot air drying device for drying the finished products (7) and a microwave drying device for drying the finished products (7) in a microwave mode, wherein the humidifying device (1), the cutting device, the heating device (2), the compressing device (3), the forming device, the mold (6), the hot air drying device and the microwave drying device are connected through a blending device; the humidifying device (1) comprises a closed humidifying barrel (11) for placing wood and a water tank (17) connected to a closed heating barrel (21) through a pipeline (18), wherein a first air pump (12) and a first closed door (13) are installed on the closed humidifying barrel (11), a water valve (19) is installed on the pipeline (18), and an opening is formed in the water tank (17); the heating device (2) comprises a closed heating barrel (21) and a first hot air pipe (22), a second closed door (23) and a pressure gauge (24) are installed on the closed heating barrel (21), and the first hot air pipe (22) is connected to the closed heating barrel (21) through a second air pump (26); the compression device (3) comprises a workbench (31) for placing wood, a pressing device for pressing the wood on the workbench (31), a fixing block (311) for abutting one end of the wood and a first hydraulic cylinder (32) arranged at the other end of the wood, wherein a wood block (321) for knocking the other end of the wood is fixed on a piston rod of the first hydraulic cylinder (32); a clamping component (68) for clamping and fixing the finished product (7) is arranged on the die (6);

the pressing device comprises a support (33) fixed on the workbench (31), a pressing plate (341) attached to the upper side and the side part of the blank, a second hydraulic cylinder (34) driving the pressing plate (341) to press the blank onto the workbench (31), a push plate (351) clamped on the blank together with the pressing plate (341) and a third hydraulic cylinder (35) driving the push plate (351) to tightly support the blank onto the pressing plate (341), the pressing plate (341) is arranged in an L shape, a piston rod of the second hydraulic cylinder (34) extends along the vertical direction and is fixedly connected to the pressing plate (341), and a piston rod of the third hydraulic cylinder (35) extends along the horizontal direction and is fixedly connected to the push plate (351);

the pressure maintaining device has the advantages that the pressure maintaining is continuously carried out on the blank materials for at least 4 hours, the metal plates (352) are arranged on one sides, opposite to the push plate (351), of the pressure plate (341), the dovetail strips (353) arranged along the extending direction of the blank materials are fixed on one sides, opposite to the push plate (351), of the pressure plate (341), and the dovetail grooves (354) for the corresponding dovetail strips (353) to be embedded in a sliding mode are formed in the two groups of metal plates (352).

2. The solid wood seamless bending production line according to claim 1, characterized in that: the device is characterized in that a pressure sensor (14) and a processor (16) are arranged on the closed humidifying barrel (11), the pressure sensor (14), the first air pump (12) and the water valve (19) are all coupled to the processor (16), when the pressure sensor (14) detects that the pressure value in the closed humidifying barrel (11) is 0.085Mpa, the pressure sensor (14) transmits a sensing signal to the processor (16), and the processor (16) controls the first air pump (12) to be closed and the water valve (19) to be opened simultaneously.

3. The solid wood seamless bending production line according to claim 1, characterized in that: a first safety valve (25) is arranged on the closed heating barrel (21).

4. The solid wood seamless bending production line according to claim 3, characterized in that: the pressing plate (341) is rotatably connected with an engaging gear (361), and a rack (38) which extends along the vertical direction and is engaged with the engaging gear (361) is fixed on the bracket (33).

5. The solid wood seamless bending production line according to claim 4, characterized in that: the four groups of the meshing gears (361) are arranged on the pressure plate (341) and are respectively arranged at the four corners of the pressure plate (341), and the four groups of the racks (38) are arranged on the bracket (33) and correspond to the meshing gears (361).

6. The solid wood seamless bending production line according to claim 1, characterized in that: clamping component (68) are including splint (681) that are "U" shape setting, are equipped with on splint (681) and supply finished product (7) and mould (6) to inlay the chamber of establishing (682), supply first conflict piece (683) that finished product (7) contradicted, screw-thread fit in splint (681) and press from both sides the screw member of pressing from both sides tightly in mould (6) and finished product (7) jointly with first conflict piece (683).

7. The solid wood seamless bending production line according to claim 1, characterized in that: the adjusting device connected with the hot air drying device and the microwave drying device is a conveyor belt passing through the microwave drying device.