CN110815446A - Hot press bending device and method for bending plate - Google Patents
Hot press bending device and method for bending plate Download PDFInfo
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- CN110815446A CN110815446A CN201911205476.8A CN201911205476A CN110815446A CN 110815446 A CN110815446 A CN 110815446A CN 201911205476 A CN201911205476 A CN 201911205476A CN 110815446 A CN110815446 A CN 110815446A
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- plate
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- hot press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27H—BENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
- B27H1/00—Bending wood stock, e.g. boards
Abstract
The invention discloses a hot press bending device and a method for bending a plate, which relate to the technical field of wood bending and comprise a beam plate, two side plates connected with the beam plate, a workbench, at least one telescopic hydraulic cylinder, a pressing platform and at least one pair of arc-shaped moulds, wherein the workbench is arranged at the bottom of the beam; the telescopic hydraulic cylinder is fixed below the beam plate; the lower pressing platform is connected with the telescopic hydraulic cylinder; the die comprises an upper die and a lower die, the upper die is connected with the lower pressing platform or integrally arranged with the lower pressing platform, and the lower die is arranged on the workbench; meanwhile, heating loops are arranged in the upper die and the lower die and are connected with the air inlet pipe and the air outlet pipe. The hot press bending device provided by the invention can be used for bending the plate while comprehensively softening the plate, has a good bending effect and higher processing efficiency, and can effectively shorten the working hours.
Description
Technical Field
The invention relates to the technical field of wood bending, in particular to a hot bending device and a method for bending a plate.
Background
Although the wood has elasticity, the plasticity under the normal state is very small, the wood can be bent within the normal stress range, the wood can restore the original shape after the stress is eliminated, and if the stress limit is exceeded, the wood can be subjected to permanent deformation and fiber splitting, so that the wood can be broken. Therefore, the common method for bending the wood is to soften the wood, increase the flexibility of the wood fiber, and fix the wood fiber in a bending fixture in time until the wood fiber is cooled and dried to finish the shaping.
When crooked panel in the mill, adopt the method of heating to make panel soften usually, however current panel bending apparatus can only heat the one side of panel mostly, can lead to panel not uniform heating like this, can not soften comprehensively to influence the crooked effect of panel, reduce the qualification rate. In addition, the softening and bending processes of the sheet material in the prior art are separated, the time consumption for bending the sheet material is long, and the processing efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hot press bending device which is used for bending a plate, can comprehensively soften the plate and bend the plate at the same time, has good bending effect and higher processing efficiency, and can effectively shorten the working time.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a hot press bending apparatus comprising:
the beam plate and two side plates connected with the beam plate;
the workbench is arranged at the bottom of the cross beam;
at least one telescopic hydraulic cylinder fixed below the beam plate;
the pressing platform is connected with the telescopic hydraulic cylinder;
the pair of arc-shaped molds comprises an upper mold and a lower mold, the upper mold is connected with the lower pressing platform or integrally arranged with the lower pressing platform, and the lower mold is arranged on the workbench; at the same time, the user can select the desired position,
and heating loops are arranged in the upper die and the lower die and are connected with the air inlet pipe and the air outlet pipe.
On the one hand, because the mould is equipped with intake pipe and the outlet duct that links to each other with heating circuit, can carry hot steam to the mould in through the intake pipe, hot steam passes through heating circuit heating mould will wait to process panel and place on the lower mould, can give the temperature transmission of lower mould and wait to process panel for wait to process panel and be heated and soften.
On the other hand, owing to have flexible pneumatic cylinder, can drive and push down platform and last mould reciprocating motion, when flexible pneumatic cylinder drove and pushes down platform and last mould downstream, when going up the mould contact and waiting to process panel, the temperature of going up the mould also transmits and waits to process panel, makes panel further be heated and softens. The telescopic hydraulic cylinder continues to move downwards to enable the upper die and the lower die to clamp the plate to be processed, so that the softened plate is bent and deformed; when the telescopic hydraulic cylinder drives the pressing platform and the upper die to move upwards, the upper die and the lower die are separated so as to put in a plate to be processed or take out the processed plate.
On the basis of the technical scheme, at least one pair of fixing frames is arranged outside the pressing platform, the distance between the two fixing frames is consistent with the width of the die, and the left side and the right side of the upper die are respectively connected with the inner sides of the lower ends of the two fixing frames.
On the basis of the technical scheme, the pressing platform is connected with the telescopic hydraulic cylinder through a connecting plate and a bolt.
On the basis of the technical scheme, a cavity is arranged inside the die, a plurality of metal plates distributed in a staggered mode are arranged in the cavity, the metal plates form an S-shaped heating loop in the cavity, and the air inlet pipe and the air outlet pipe are connected with two ends of the S-shaped heating loop respectively.
On the basis of the technical scheme, the height of the metal plate is the same as that of the die.
Because the height of the metal plate is the same as that of the mould, hot steam cannot flow through the upper end and the lower end of the metal plate and only can flow through the heating loop, and therefore the hot steam is guaranteed to flow out of the mould only through the heating loop, and the utilization rate of the hot steam is improved.
On the basis of the technical scheme, the metal plates are vertically arranged in the die and are distributed at equal intervals, and one ends of the metal plates are connected to the front side or the rear side of the die.
On the basis of the technical scheme, the air inlet pipe is arranged on one side of the rear end of the die, and the air outlet pipe is arranged on the other side of the rear end of the die.
On the basis of the technical scheme, the die is made of iron.
On the basis of the technical scheme, the device comprises two telescopic hydraulic cylinders and two pairs of dies.
The invention also provides a method for bending a plate by adopting the hot-press bending device, which comprises the following steps:
conveying hot steam into the air inlet pipe to enable the mold to reach a preset temperature;
placing a plate to be processed on the lower die;
controlling the telescopic hydraulic cylinder to move downwards so that the upper die and the lower die clamp the plate;
and controlling the telescopic hydraulic cylinder to move upwards, so that the upper die and the lower die are separated, and taking out the plate.
Drawings
Fig. 1 is a schematic structural diagram of a thermal bending apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an upper die and a lower die in the embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating distribution positions of metal plates according to an embodiment of the present invention.
In the figure: 1-beam slab; 2-side plate; 3-a workbench; 4-a telescopic hydraulic cylinder; 5-pressing the platform; 6-connecting plates; 7-bolt; 8-molding; 9-a plate material; 10-an air inlet pipe; 11-an air outlet pipe; 80-upper die; 81-lower die; 12-a fixing frame; 13-a metal plate; 14-a cavity.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1 and 2, an embodiment of the present invention provides a hot press bending apparatus for bending a plate 9, including: the device comprises a beam plate 1, two side plates 2 connected with the beam plate, a workbench 3, at least one telescopic hydraulic cylinder 4, a lower pressing platform 5 and at least one pair of arc-shaped molds 8, wherein the workbench 3 is arranged at the bottom of the beam 1; the telescopic hydraulic cylinder 4 is fixed below the beam plate 1; the lower pressing platform 5 is connected with the telescopic hydraulic cylinder 4; the die 8 comprises an upper die 80 and a lower die 81, the upper die 80 is connected with the lower pressing platform 5 or integrally arranged with the lower pressing platform 5, and the lower die 81 is arranged on the workbench 3; meanwhile, heating loops are arranged in the upper die 80 and the lower die 81, and the heating loops are connected with the air inlet pipe 10 and the air outlet pipe 11.
Specifically, the plate 9 to be processed can be placed on the lower die 81, the air inlet pipe 10 can be connected with a boiler to transmit hot steam into the die 8, the temperature of the pair of dies 8 is gradually increased to a preset temperature under the action of the hot steam, the lower die 81 transfers heat to the plate 9 in contact with the lower die, and the plate 9 is gradually heated and softened. The telescopic hydraulic cylinder 4 can drive the downward pressing platform 5 and the upper die 80 to move back and forth, when the telescopic hydraulic cylinder 4 moves downwards, the upper die 80 contacts the plate 9 and transfers heat to the plate 9, and at the moment, the pair of dies 8 can both transfer heat to the plate 9, so that the process that the plate 9 is heated and softened is accelerated. The telescopic hydraulic cylinder 4 continues to move downwards until the upper die 80 and the lower die 81 can clamp the sheet material 9, and the softened sheet material 9 is bent and deformed by the pair of dies 8. In addition, the telescopic hydraulic cylinder 4 can drive the downward pressing platform 5 and the upper die 80 to move upwards, so that the processed plate 9 can be conveniently taken out or the plate 9 to be processed can be conveniently put in.
In the embodiment of the invention, the mold 8 is connected with a thermometer, the air inlet pipe 10 is connected with an electromagnetic valve, and the electromagnetic valve is used for controlling the air inlet amount of the air inlet pipe 10. When the temperature displayed by the thermometer is higher than the preset temperature, the electromagnetic valve controls the air inlet pipe 10 to stop air inlet or reduce air inlet amount; when the temperature displayed by the thermometer is lower than the preset temperature, the electromagnetic valve controls the air inlet pipe 10 to increase the air inlet quantity. And keeping the temperature in the die 8 to be a preset temperature through a thermometer and an electromagnetic valve so as to heat the plate 9 in a constant temperature state.
Furthermore, at least one pair of fixing frames 12 are arranged outside the pressing platform 5, the distance between the two fixing frames 12 is consistent with the width of the mold 8, and the left side and the right side of the upper mold 80 are respectively connected with the inner sides of the lower ends of the two fixing frames 12.
In the embodiment of the present invention, on the basis of the connection between the upper mold 80 and the lower platen 5, the left and right sides of the upper mold 80 are respectively connected to the inner sides of the lower ends of the two fixing frames 12, so that the connection between the upper mold 80 and the upper part thereof is enhanced, and the upper mold 80 is prevented from falling off during the use process.
Further, the press platform 5 is connected to the telescopic hydraulic cylinder 4 by a connecting plate 6 and a bolt 7.
Referring to fig. 2 and 3, as a preferred embodiment, a cavity 14 is formed inside the mold 8, a plurality of metal plates 13 are arranged in the cavity 14 in a staggered manner, the plurality of metal plates 13 form an S-shaped heating loop in the cavity 14, and the air inlet pipe 10 and the air outlet pipe 11 are respectively connected with two ends of the S-shaped heating loop.
The hot steam flows from the inlet pipe 10 into one end of the S-shaped heating circuit, flows through the whole heating circuit, flows from the other end of the S-shaped heating circuit to the outlet pipe 11, and is discharged from the mold 8. As a preferred embodiment, the height of the metal plate 13 is the same as the height of the mold 8.
In the embodiment of the invention, because the metal plate 13 and the die 8 are at the same height, the hot steam cannot flow through the upper end and the lower end of the metal plate 13 and only can flow through the heating loop, so that the hot steam is prevented from being immediately discharged from the air outlet pipe 11 after flowing in from the air inlet pipe 10, and the utilization rate of the hot steam is improved.
As a preferred embodiment, the metal plates 13 are vertically arranged and equidistantly distributed in the mold 8, and one end of the metal plate 13 is connected to the front side or the rear side of the mold 8.
In the embodiment of the invention, the metal sheets 13, which are equally spaced, form an S-shaped heating circuit inside the mould 8, and the hot steam transfers heat to the mould 8 and the metal sheets 13 along the heating circuit as indicated by the arrows in fig. 3.
In a preferred embodiment, the air inlet pipe 10 is disposed on one side of the rear end of the mold 8, and the air outlet pipe 11 is disposed on the other side of the rear end of the mold 8.
In the embodiment of the invention, after entering the mold 8 from the air inlet pipe 10 at one side of the rear end of the mold 8, the hot steam flows through the metal plate 13 along the S-shaped heating loop and is exhausted from the air outlet pipe 11 at the other side of the rear end of the mold 8, and completely flows through the whole interior of the mold 8, so that the mold 8 is uniformly heated, and the heat energy brought by the hot steam is utilized to the maximum extent.
In a preferred embodiment, the mold 8 is made of iron.
In the embodiment of the invention, the die 8 is formed by welding iron plates, the metal plate 13 is an iron plate, the iron die 8 and the metal plate 13 have the characteristics of high heat transfer speed and high hardness, the heat transfer efficiency can be improved, and the die 8 can be prevented from being extruded and deformed by the pressure applied by an upper part, such as the lower pressing platform 5, so that the die 8 has long service life, and the time delay caused by frequent replacement due to deformation or damage of the die 8 is avoided. As a preferred embodiment, two telescopic hydraulic cylinders 4 and two pairs of dies 8 are included, so that the hot press bending device can process two sheets of plates 9 at the same time, and the processing efficiency is improved.
In the embodiment of the present invention, the number of the fixing frames 12 is two, the distance between the left telescopic hydraulic cylinder 4 and the left side plate 2 is the same as the distance between the right telescopic hydraulic cylinder 4 and the right side plate 2, each telescopic hydraulic cylinder 4 is located in the middle of a pair of fixing frames 12, and the distance between the leftmost fixing frame 12 and the left side plate 2 is the same as the distance between the rightmost fixing frame 12 and the right side plate 2, so that the thermal press bending apparatus can be kept balanced.
Example 2
Referring to fig. 1 and 2, an embodiment of the present invention provides a method of bending a sheet material using a hot press bending apparatus as described in embodiment 1, including the steps of:
connecting an air inlet pipe 10 with a boiler, transmitting hot steam into the air inlet pipe 10, and allowing the hot steam to enter a mold 8 and enabling the temperature of the mold 8 to reach a preset temperature;
placing the plate 9 to be processed on a lower die 81, wherein the lower die 81 transfers heat to the plate 9 to be processed, and the lower part of the plate 9 is softened after being heated;
and controlling the telescopic hydraulic cylinder 4 to move downwards, driving the downward pressing platform 5 and the upper die 80 to move downwards by the telescopic hydraulic cylinder 4, contacting the upper die 80 with the plate 9 and transferring heat to the plate 9, so that the upper part of the plate 9 is softened after being heated. The telescopic hydraulic cylinder 4 further moves downwards to enable the upper die 80 and the lower die 81 to clamp the plate 9, the plate 9 softened by heating is subjected to bending deformation caused by the downward pressure of the upper die 80 and the upward pressure of the lower die 81, the plate 9 is further attached to the arc surface of the die 8 in the bending process, so that the heating surface is increased, the softening speed is further increased, the plate 9 is softened while being bent, and when the plate 9 is bent to be consistent with the radian of the die 8, the current state is kept for a moment, so that the processing effect of the plate 9 is better;
and then, controlling the telescopic hydraulic cylinder 4 to move upwards to separate the upper die 80 and the lower die 81, taking out the processed plate 9, and placing the plate 9 on a cooling rack for cooling and drying to finish shaping.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A hot press bending device for bending sheet material (9), comprising:
a beam plate (1) and two side plates (2) connected with the beam plate;
the workbench (3) is arranged at the bottom of the cross beam (1);
at least one telescopic hydraulic cylinder (4) fixed below the beam plate (1);
the pressing platform (5) is connected with the telescopic hydraulic cylinder (4);
at least one pair of arc-shaped molds (8) which comprise an upper mold (80) and a lower mold (81), wherein the upper mold (80) is connected with the lower pressing platform (5) or integrally arranged with the lower pressing platform (5), and the lower mold (81) is arranged on the workbench (3); at the same time, the user can select the desired position,
and heating loops are arranged in the upper die (80) and the lower die (81) and are connected with the air inlet pipe (10) and the air outlet pipe (11).
2. A hot press bending apparatus according to claim 1, wherein at least one pair of fixing frames (12) is provided outside the lower press platen (5), a distance between the two fixing frames (12) is in accordance with a width of the mold (8), and left and right sides of the upper mold (80) are respectively connected to inner sides of lower ends of the two fixing frames (12).
3. A hot press bending apparatus according to claim 1, wherein the press platen (5) is connected to the telescopic hydraulic cylinder (4) by means of a connecting plate (6) and bolts (7).
4. A hot press bending apparatus according to claim 1, wherein a cavity (14) is formed inside the mold (8), a plurality of metal plates (13) are arranged in the cavity (14) in a staggered manner, the plurality of metal plates (13) form an S-shaped heating loop in the cavity (14), and the air inlet pipe (10) and the air outlet pipe (11) are respectively connected with two ends of the S-shaped heating loop.
5. A hot press bending device according to claim 4, wherein the height of the metal sheet (13) is the same as the height of the die (8).
6. A hot press bending apparatus according to claim 5, wherein said metal sheets (13) are arranged vertically and equidistantly within said mold (8), one end of said metal sheets (13) being connected to the front or rear side of said mold (8).
7. A hot press bending apparatus according to claim 1, wherein said air inlet pipe (10) is provided on one side of the rear end of said mold (8), and said air outlet pipe (11) is provided on the other side of the rear end of said mold (8).
8. A hot press bending device according to claim 1, wherein the material of the mould (8) is iron.
9. A hot press bending apparatus according to claim 1, comprising two of said telescopic hydraulic cylinders (4) and two pairs of said dies (8).
10. A method of bending a sheet material, characterized by using the hot press bending apparatus according to any one of claims 1 to 9, comprising the steps of:
transferring hot steam into the air inlet pipe (10) so as to enable the temperature of the mold (8) to reach a preset temperature;
placing a plate (9) to be processed on the lower die (81);
controlling the telescopic hydraulic cylinder (4) to move downwards so that the upper die (80) and the lower die (81) clamp the plate (9);
and controlling the telescopic hydraulic cylinder (4) to move upwards, separating the upper die (80) from the lower die (81), and taking out the plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205476.8A CN110815446A (en) | 2019-11-29 | 2019-11-29 | Hot press bending device and method for bending plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205476.8A CN110815446A (en) | 2019-11-29 | 2019-11-29 | Hot press bending device and method for bending plate |
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| Publication Number | Publication Date |
|---|---|
| CN110815446A true CN110815446A (en) | 2020-02-21 |
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| CN201911205476.8A Pending CN110815446A (en) | 2019-11-29 | 2019-11-29 | Hot press bending device and method for bending plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231040A (en) * | 2020-03-20 | 2020-06-05 | 南京林业大学 | Novel degradable fiber straw and manufacturing method thereof |
| CN114654554A (en) * | 2022-03-24 | 2022-06-24 | 湖北燕加隆木制品有限公司 | Special-shaped floor production method and special-shaped floor processing frame |
-
2019
- 2019-11-29 CN CN201911205476.8A patent/CN110815446A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111231040A (en) * | 2020-03-20 | 2020-06-05 | 南京林业大学 | Novel degradable fiber straw and manufacturing method thereof |
| CN114654554A (en) * | 2022-03-24 | 2022-06-24 | 湖北燕加隆木制品有限公司 | Special-shaped floor production method and special-shaped floor processing frame |
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