CN111730703B - A wood bending device with vertical and horizontal two-way compression and its application method - Google Patents

Abstract

The invention discloses a wood bending device with longitudinal and transverse bidirectional compression, which comprises a frame, a longitudinal loading assembly, a transverse loading assembly, a bending assembly and a steel belt, wherein the longitudinal loading assembly, the transverse loading assembly, the bending assembly and the steel belt are fixed on the frame, the longitudinal loading assembly and the transverse loading assembly are sequentially arranged along the length direction of the steel belt, the bending assembly and the transverse loading assembly are oppositely arranged on two sides of the steel belt, one end of the steel belt is fixed on the bending assembly, the front end of softened wood is positioned between the bending assembly and the steel belt, the longitudinal loading assembly is pressed on the rear end of the wood to extrude the wood to advance towards the direction of the bending assembly, and the transverse loading assembly is pressed on the steel belt to extrude the wood to cling to the bending assembly for bending.

Description

A wood bending device with vertical and horizontal two-way compression and its application method

technical field

The invention relates to the technical field of wood bending, in particular to a wood bending device with vertical and horizontal two-way compression and a use method.

Background technique

As a unique type of wood products, curved wood products use certain methods to process wood into different curved shapes and apply them to the furniture and construction industries. They are also common in daily life. In production, the manufacturing methods of curved parts are generally divided into three types: sawing processing, pressurized bending processing, and thin plate gluing and bending.

At present, most of the wood bending equipment used in the furniture industry is to put the softened wood into the fixed mold. The initial stage of bending is a three-point force, that is, the two ends of the wood are against the high point of the female mold of the mold, and the middle point is compressed by the high point of the male mold. It is quickly produced and transmitted to the inner and outer layers of the wood. At this time, the inner layer of the wood is prone to wrinkles and the outer layer is easily broken.

At present, some imported wood bending equipment is equipped with a longitudinal preloading device, but generally it is longitudinally compressed first and then bent. The bending and compression are not synchronized. The internal stress generated by compression and the bending cannot cancel each other out. When the wood is bent, inner layer wrinkles and outer layers will occur. Defects such as cracks, the bending effect is poor.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a wood bending device with longitudinal and horizontal two-way compression and a use method that reduces defects generated when wood is bent and has good wood bending effect.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A wood bending device with vertical and horizontal two-way compression, including a frame and a longitudinal loading assembly fixed on the frame, a lateral loading assembly, a bending assembly and a steel belt, and the longitudinal loading assembly and the lateral loading assembly are sequentially along the length of the steel belt The directions are arranged sequentially, the bending assembly and the transverse loading assembly are arranged on both sides of the steel strip oppositely, one end of the steel strip is fixed on the bending assembly, the front end of the softened wood is located between the bending assembly and the steel strip, and the longitudinal loading The component is pressed on the rear end of the wood to push the wood to move toward the bending component, and the lateral loading component is pressed on the steel belt to squeeze the wood to be bent against the curved component.

As a further improvement to the above technical solution:

The longitudinal loading assembly includes a feeding mechanism, a supporting mechanism and a longitudinal pressing mechanism, the feeding mechanism and the supporting mechanism are relatively arranged on both sides of the wood, and the longitudinal pressing mechanism is located between the feeding mechanism and the supporting mechanism and used When applying pressure to the rear end of the wood, the feeding mechanism is used for longitudinal feeding of the wood, and the supporting mechanism is used to prevent the wood from laterally deforming when the longitudinal pressing mechanism applies pressure.

The supporting mechanism includes a longitudinal rolling pulley block, a regulating valve and a horizontal regulating slide rail. The longitudinal rolling pulley block is set close to one side of the wood, and the longitudinal rolling pulley block is fixed on the horizontal regulating slide rail. The side part of the slide rail is connected with the frame, and the position of the horizontal adjustment slide rail is adjusted by rotating the regulating valve to adjust the distance between the longitudinal rolling pulley block and the steel belt.

The longitudinal pressing mechanism includes a longitudinal pressing oil cylinder and a stopper, and the stopper is in contact with the rear end of the wood and exerts pressure on the back end of the wood under the action of the longitudinal pressing oil cylinder.

The feeding mechanism includes a longitudinal feeding motor and a longitudinal feeding chain, and the longitudinal feeding chain drives the wood to advance toward the bending assembly under the drive of the longitudinal feeding motor.

The lateral loading assembly includes a slider, a slide rail, a lateral pressure cylinder and a lateral pressure wheel, the lateral pressure cylinder is fixedly connected to the slider, the slide rail is fixed on the frame, and the slider and the slider The rail is slidingly matched, and the lateral pressure wheel is arranged near the side of the steel belt and pressed on the steel belt under the drive of the horizontal pressure cylinder.

The bending assembly includes a bending wheel mold and a bending power motor, and the bending power motor is used to drive the bending wheel mold to rotate to bend wood.

The bending assembly also includes a locking device, which is used to fix one end of the steel strip to the bending wheel mold.

As a general inventive concept, the present invention also provides a method for using a wood bending device with vertical and horizontal bidirectional compression, including the following steps:

S1, placing the softened wood between the steel belt and the longitudinal rolling pulley block;

S2. Turn on the longitudinal feeding motor to drive the wood to the direction of the bending assembly, and close it when the front end of the wood is pressed against the steel belt;

S3. Turn on the bending power motor, turn it off after rotating to a preset angle, turn on the horizontal pressurization cylinder and the longitudinal pressurization cylinder to apply pressure to the wood and compress the wood, and when the longitudinal compression rate of the wood reaches the preset value, turn on the bending power motor and the longitudinal pressurization cylinder. The feed motor bends the wood at a preset speed;

S4. After the wood is bent, turn off the bending power motor, the longitudinal feed motor and the longitudinal pressurized oil cylinder, and carry out pressure-holding and cooling treatment on the wood;

S5. After the wood is cooled to the preset temperature, the steel strip and the wood are removed from the bending wheel mold, and the wood is shaped according to the preset requirements.

As a further improvement to the above technical solution:

In the step S3, the preset angle is 15°.

In the step S3, the applied pressure value of the horizontal pressurized oil cylinder is 0.8-1.0 MPa, and the applied pressure value of the longitudinal pressurized oil cylinder is 1.2-2.0 MPa.

In the step S3, the preset rotation speed is 0.3-0.5 rpm.

In the step S3, the preset value of the longitudinal compression rate is 2-5%.

In the step S5, the preset temperature is less than 80°C.

Compared with the prior art, the present invention has the advantages of:

A wood bending device with longitudinal and horizontal two-way compression and its use method of the present invention, in the bending process, the wood is in full contact with the bending components, the overall force is uniform and the force is uniform, internal stress is generated inside the wood during bending, and the internal stress is along the The longitudinal direction of the wood is transmitted to the unbent end, and the longitudinal and transverse forces are respectively applied to the wood through the longitudinal loading component and the transverse loading component. The internal stress generated by the vertical and horizontal compression partly offsets the internal stress generated by the bending, which greatly reduces the initial stage of wood bending. The inner layer of the wood is wrinkled and the outer layer is cracked, and the bending effect is better. The device of the invention has wide applicability, low cost and simple process steps.

Description of drawings

Fig. 1 is a top view of the wood bending device with vertical and horizontal bidirectional compression of the present invention.

Fig. 2 is a front view of the wood bending device with vertical and horizontal bidirectional compression of the present invention.

Fig. 3 is a partial enlarged view of A in Fig. 1 .

The labels in the figure indicate: 1, longitudinal loading assembly; 11, feeding mechanism; 111, longitudinal feeding motor; 112, longitudinal feeding chain; 12, supporting mechanism; 121, longitudinal rolling pulley block; Horizontal adjustment slide rail; 13, longitudinal pressure mechanism; 131, longitudinal pressure cylinder; 132, stopper; 2, lateral loading assembly; 21, slider; 22, slide rail; 23, lateral pressure cylinder; Pressing wheel; 3. Bending component; 31. Bending wheel mold; 32. Locking device; 33. Bending power motor; 4. Rack; 5. Steel belt; 6. Wood.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

Example 1:

As shown in Figures 1 to 3, a wood bending device with vertical and horizontal two-way compression in this embodiment includes a frame 4 and a longitudinal loading assembly 1 fixed on the frame 4, a lateral loading assembly 2, a bending assembly 3 and steel The belt 5, the longitudinal loading assembly 1 and the lateral loading assembly 2 are sequentially arranged along the length direction of the steel belt 5, the bending assembly 3 and the lateral loading assembly 2 are arranged on both sides of the steel belt 5, and one end of the steel belt 5 is fixed to the bending assembly 3 Above, the front end of the softened wood 6 is located between the bending assembly 3 and the steel belt 5, the longitudinal loading assembly 1 exerts pressure on the rear end of the wood 6 to push the wood 6 to the direction of the bending assembly 3, and the lateral loading assembly 2 applies pressure to the steel belt. The belt 5 is bent against the bending assembly 3 with extruded wood 6 .

In the wood bending device with vertical and horizontal two-way compression of the present invention, during the bending process, the wood 6 is fully in contact with the bending assembly 3, and the overall force is uniform and uniform. When bending, internal stress is generated inside the wood 6, and the internal stress is along the 6 The longitudinal direction is transmitted to the unbent end, and the longitudinal and transverse forces are respectively applied to the wood 6 through the longitudinal loading component 1 and the transverse loading component 2. The internal stress generated by the vertical and horizontal compression partly offsets the internal stress generated by the bending, which greatly reduces the 6 In the initial stage of bending, the inner layer of the wood is wrinkled and the outer layer is cracked, and the bending effect is better.

In this embodiment, the transverse direction is perpendicular to the length direction of the wood 6 , and the longitudinal direction is parallel to the length direction of the wood 6 .

The longitudinal loading assembly 1 includes a feeding mechanism 11, a supporting mechanism 12 and a longitudinal pressing mechanism 13. The feeding mechanism 11 and the supporting mechanism 12 are relatively arranged on both sides of the timber 6, and the longitudinal pressing mechanism 13 is located between the feeding mechanism 11 and the supporting mechanism 12. Between and for applying pressure to the rear end of the wood 6, the feed mechanism 11 is used for longitudinal feeding of the wood 6, and the support mechanism 12 is used to prevent the wood 6 from laterally deforming when the longitudinal pressing mechanism 13 applies pressure.

In this embodiment, the support mechanism 12 includes a longitudinal rolling pulley block 121, a regulating valve 122, and a lateral adjustment slide rail 123. The longitudinal rolling pulley block 121 is arranged close to one side of the wood 6, and the longitudinal rolling pulley block 121 is fixed on the horizontal adjustment slide rail 123. The valve 122 is in contact with the side of the horizontal adjustment slide rail 123 and is connected with the frame 4 , and the position of the horizontal adjustment slide rail 123 is adjusted by rotating the regulating valve 122 to adjust the distance between the longitudinal rolling pulley block 121 and the steel belt 5 . When the longitudinal pressing mechanism 13 longitudinally loads the wood 6, the supporting mechanism 12 and the feeding mechanism 11 fix the side of the wood 6 to prevent lateral deformation of the side of the wood 6.

In this embodiment, the lateral adjustment slide rail 123 is embedded in the frame 4 .

In this embodiment, the longitudinal pressing mechanism 13 includes a block 131 and a stopper 132 , the stopper 132 is in contact with the rear end of the wood and presses the rear end of the wood 6 under the action of the longitudinal pressurization cylinder 131 . The longitudinal pressing mechanism 13 is responsible for applying a longitudinal force to the rear end of the wood 6 to push the wood 6 to move, and the longitudinal force can adjust the load according to actual needs.

In this embodiment, the longitudinal press cylinder 131 of the longitudinal press mechanism 13 is fixed on the frame 4 through a fixing block (not shown in the figure). The longitudinal pressing mechanism 13 is located on the same horizontal line as the timber 6 .

In this embodiment, the feeding mechanism 11 includes a longitudinal feeding motor 111 and a longitudinal feeding chain 112, and the longitudinal feeding chain 112 drives the wood 6 to advance in the direction of the bending assembly 3 under the drive of the longitudinal feeding motor 111, responsible for the longitudinal feeding of the wood 6. feed.

In this embodiment, the wood 6 and the steel belt 5 are clamped together by a clamping device (not shown in the figure), and the longitudinal feeding chain 112 is in contact with the steel belt 5. When the longitudinal feeding chain 112 moves, the steel belt 5 is driven. movement, and then drive the wood 6 to move together.

The lateral loading assembly 2 includes a slider 21, a slide rail 22, a lateral pressure cylinder 23 and a lateral pressure wheel 24, the lateral pressure cylinder 23 is fixedly connected with the slider 21, the slide rail 22 is fixed on the frame 4, and the slider 21 Slidingly matched with the slide rail 22 , the transverse pressure wheel 24 is arranged near the side of the steel belt 5 and pressed on the steel belt 5 under the drive of the transverse pressure cylinder 23 . Through the cooperation of the slide block 21 and the slide rail 22, the position of the lateral pressure cylinder 23 can be adjusted within a certain range in the lateral direction, and is responsible for applying an adjustable load on the wood 6 laterally.

The bending assembly 3 includes a bending wheel mold 31 and a bending power motor 33 , and the bending power motor 33 is used to drive the bending wheel mold 31 to rotate to bend the timber 6 . The rotating speed of bending power motor 33 can be adjusted accordingly according to timber 6 raw material species.

The bending assembly 3 also includes a locking device 32 for fixing one end of the steel strip 5 to the bending wheel mold 31 .

A method for using a wood bending device with vertical and horizontal bidirectional compression in this embodiment includes the following steps:

S1: Wood softening: heating the wood 6 to the glass transition temperature by steaming or boiling;

S2: wood loading: fix one end of the steel belt 5 on the bending wheel mold 31 through the locking device 32, and adjust the distance between the longitudinal rolling pulley block 121 and the steel belt 5 and the horizontal pressure cylinder 23 and the steel belt 5 according to the thickness of the wood 6 The distance between the softened wood 6 is placed between the steel belt 5 and the longitudinal rolling pulley block 121;

S3: Wood feeding: Turn on the longitudinal feeding motor 111, and stop feeding when the front end of the wood 6 presses against the steel belt 5;

S4: Timber compression: turn on the bending power motor 33 and stop after turning 15 degrees (if the longitudinal pressure cylinder 131 is opened directly, the force to be borne by the steel belt 5 is relatively large). Open the horizontal pressurization cylinder 23 and the longitudinal pressurization cylinder 131 to apply pressure to the wood 6 to compress the wood 6, and the lateral pressure of the horizontal pressurization cylinder 23 is set to 0.8MPa (in other embodiments, 0.8～1.0MPa can also obtain the same or similar The technical effect can ensure that the wood 6 can be compressed and will not be crushed), and the longitudinal pressure of the longitudinal pressure cylinder 131 is set to 1.2MPa (in other embodiments, the same or similar technology can also be obtained from 1.2 to 2.0MPa effect), the longitudinal compression rate is controlled within the range of 2 to 5%;

S4: wood bending: turn on the bending power motor 33 and the longitudinal feeding motor 111 at the same time, keep the longitudinal and lateral pressure, and control the speed of the bending power motor 33 at 0.3 rpm (in other embodiments, 0.3～0.5 rpm is also The same or similar technical effect can be achieved, too fast speed will cause the wood to break, too slow to lower the production efficiency), and the wood will be bent;

S5: Wood keeping pressure and cooling: After the bending is completed, turn off the bending power motor 33, the longitudinal feeding motor 111 and the longitudinal pressurizing oil cylinder 131, and wait for the wood 6 to cool down to below 80°C.

S6: mold locking and shaping: when the temperature of the wood 6 is lower than 80°C, lock both ends of the steel strip 5, remove the wood 6 and the steel strip 5 from the bending wheel mold 31, and send them to a drying kiln for drying and shaping.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (6)

1. A wood bending device with vertical and horizontal bidirectional compression, characterized in that it includes a frame (4) and a longitudinal loading assembly (1), a lateral loading assembly (2), and a bending assembly ( 3) and the steel belt (5), the longitudinal loading assembly (1) and the lateral loading assembly (2) are sequentially arranged along the length direction of the steel belt (5), the bending assembly (3) and the lateral loading assembly (2 ) are relatively arranged on both sides of the steel belt (5), one end of the steel belt (5) is fixed on the bending component (3), and the front end of the softened wood (6) is located between the bending component (3) and the steel belt (5) Between, the longitudinal loading assembly (1) presses the rear end of the wood (6) to press the wood (6) to move toward the bending assembly (3), and the lateral loading assembly (2) presses the steel belt ( 5) The extruded wood (6) is pressed against the bending component (3) to bend; The longitudinal loading assembly (1) includes a feeding mechanism (11), a supporting mechanism (12) and a longitudinal pressing mechanism (13), and the feeding mechanism (11) and the supporting mechanism (12) are relatively arranged on the wood (6 ), the longitudinal pressing mechanism (13) is located between the feeding mechanism (11) and the supporting mechanism (12) and is used to apply pressure to the rear end of the wood (6), and the feeding mechanism (11) uses The wood (6) is fed longitudinally, and the support mechanism (12) is used to prevent the wood (6) from being deformed laterally when the longitudinal pressure mechanism (13) applies pressure; The support mechanism (12) includes a longitudinal rolling pulley set (121), a regulating valve (122) and a horizontal adjustment slide rail (123). The longitudinal rolling pulley set (121) is set close to one side of the wood (6), and the The rolling pulley set (121) is fixed on the horizontal adjustment slide rail (123), and the adjustment valve (122) is in contact with the side of the horizontal adjustment slide rail (123) and connected with the frame (4). By rotating the adjustment valve (122) Adjust the position of the horizontal adjustment slide rail (123) to adjust the distance between the longitudinal rolling pulley block (121) and the steel belt (5); The lateral loading assembly (2) includes a slider (21), a slide rail (22), a lateral pressure cylinder (23) and a lateral pressure wheel (24), and the lateral pressure cylinder (23) and the slider ( 21) Fixed connection, the slide rail (22) is fixed on the frame (4), the slide block (21) and the slide rail (22) are slidingly matched, and the transverse pressure wheel (24) is close to the steel belt ( 5) Set on one side and exert pressure on the steel belt (5) under the drive of the horizontal pressure cylinder (23). 2. The wood bending device according to claim 1, characterized in that: the longitudinal pressurization mechanism (13) includes a longitudinal pressurization cylinder (131) and a stopper (132), and the stopper (132) is in contact with Timber rear end is also pressed on the timber (6) rear end under the effect of longitudinal pressure oil cylinder (131). 3. The wood bending device according to claim 1, characterized in that: the feeding mechanism (11) includes a longitudinal feeding motor (111) and a longitudinal feeding chain (112), and the longitudinal feeding chain (112 ) is driven by the longitudinal feeding motor (111) to drive the wood (6) to advance towards the bending assembly (3). 4. The wood bending device according to any one of claims 1 to 3, characterized in that: the bending assembly (3) includes a bending wheel mold (31) and a bending power motor (33), and the bending power motor (33) is used to drive the bending wheel mold (31) to rotate to bend the timber (6). 5. The wood bending device according to claim 4, characterized in that: the bending assembly (3) further includes a locking device (32), and the locking device (32) is used to lock the steel strip (5) One end is fixed on the curved wheel mold (31). 6. A method for using the wood bending device with vertical and horizontal bidirectional compression according to any one of claims 1 to 5, characterized in that it includes the following steps: S1, placing the softened wood (6) between the steel belt (5) and the longitudinal rolling pulley block (121); S2. Turn on the longitudinal feeding motor (111) to drive the wood (6) to advance towards the bending assembly (3), and close it when the front end of the wood (6) presses against the steel belt (5); S3. Turn on the bending power motor (33), turn it off after rotating to a preset angle, turn on the horizontal pressurization cylinder (23) and the longitudinal pressurization cylinder (131) to apply pressure to the wood (6) and compress the wood (6), when the wood ( 6) After the longitudinal compression rate reaches the preset value, turn on the bending power motor (33) and the longitudinal feeding motor (111) to bend the wood (6) according to the preset speed; S4. After the wood (6) is bent, turn off the bending power motor (33), the longitudinal feed motor (111) and the longitudinal pressurized oil cylinder (131), and perform pressure-holding and cooling treatment on the wood (6); S5. After the wood (6) is cooled to the preset temperature, the steel strip (5) and the wood (6) are removed from the bending wheel mold (31), and the wood (6) is shaped according to the preset requirements; In the step S3, the pressure applied by the horizontal pressurizing cylinder (23) is 0.8-1.0 MPa, and the pressure applied by the longitudinal pressurizing cylinder (131) is 1.2-2.0 MPa.