Bending device for wooden part of chair

Abstract

The utility model relates to a chair wooden part bending device which comprises a workbench, a supporting frame, a hydraulic cylinder at the bottom of the supporting frame and a pressing plate arranged on the workbench through a guide column, the hydraulic cylinder is fixedly connected with the pressing plate, an upper die plate is arranged at the bottom of the pressing plate, and a lower die cavity corresponding to the upper die plate is formed in the top of the workbench. A plurality of containing grooves are formed in the top of the lower die cavity at equal intervals, a plurality of hydraulic telescopic rods are arranged in the containing grooves at equal intervals, a roller shaft is rotationally installed at the top end of each hydraulic telescopic rod, and spring pieces located above the roller shafts are arranged in the containing grooves. The spring pieces can be driven by the hydraulic telescopic rods to be bent into different radians, wood plates needing to be bent are placed in the containing grooves and finally shaped under the pressure effect of the upper die plate, due to the fact that the containing grooves are multiple, multiple wood plates with the same size or multiple wood plates with different sizes can be bent at the same time, and the bending efficiency is improved. And the bending efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture manufacturing, in particular to a bending device for the wooden part of a chair. Background Art

[0002] With the rapid development of my country's economy and the improvement of living standards, wooden furniture as a style has been increasingly welcomed. At present, in order to cater to the aesthetic tastes of consumers, many existing wooden furniture companies, in addition to the selection of raw materials, will also make certain considerations and designs on the appearance and structure of wooden furniture, which often involve some curves or curved structures. Therefore, in production, it is necessary to bend the thin-walled wood board to a certain extent according to the requirements of this type of curve or curved structure to achieve the original design. However, in the actual production process, the existing bending device is only suitable for thin-walled wood boards with a single bending part, that is, only one part of the thin-walled wood board can be bent at a time; for thin-walled wood boards that need to be bent continuously, the use of existing bending devices requires repeated positioning of the wood boards and bending them in sequence, which is inefficient and prone to errors, resulting in low dimensional accuracy and difficulty in meeting product requirements. Utility Model Content

[0003] The utility model aims to provide a device for bending the wooden part of a chair to solve the problems existing in the above-mentioned prior art.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A bending device for the wooden part of a chair comprises a workbench, a support frame is arranged at the top of the workbench, a hydraulic cylinder is arranged at the center position of the bottom of the support frame, a guide column is arranged at the top of the workbench, a pressure plate is slidably installed on the guide column, the hydraulic cylinder is fixedly connected to the pressure plate, an upper template is arranged at the bottom of the pressure plate, a lower mold cavity corresponding to the upper template is arranged at the top of the workbench, a heating device is arranged inside the lower mold cavity, a plurality of accommodating grooves are arranged at equal intervals at the top of the lower mold cavity, a plurality of hydraulic telescopic rods are arranged at equal intervals inside the accommodating grooves, a roller shaft is rotatably installed at the top of each of the hydraulic telescopic rods, a spring sheet located above the roller shaft is arranged inside the accommodating groove, the periphery of the spring sheet is in contact with the inner wall of the accommodating groove, a first slide groove and a second slide groove are symmetrically arranged at the inner bottom end of the accommodating groove, the spring sheet is provided with a first extending end located inside the first slide groove, and the spring sheet is provided with a second extending end located inside the second slide groove.

[0006] By adopting the above technical scheme, the spring sheet can be bent into different curvatures under the drive of multiple hydraulic telescopic rods, and the wooden board to be bent is placed in the receiving groove, and is finally shaped under the pressure of the upper template. In this way, the wooden board can be bent at different angles, and the wooden board can be pre-bent by adjusting the relative position of the hydraulic telescopic rod and the spring sheet inside the same receiving groove. Because there are multiple receiving grooves, multiple wooden boards of the same size can be bent at the same time, or multiple wooden boards of inconsistent sizes can be bent at the same time, which greatly increases the bending efficiency and the bending accuracy.

[0007] In a further embodiment, a plurality of nitrogen springs are provided at the bottom of the pressure plate, the bottom ends of the nitrogen springs are fixedly connected to the upper template, the top ends of the nitrogen springs are fixedly connected to the pressure plate, and the four corners of the bottom of the pressure plate are provided with equal-height sleeves, and there is a gap between the bottom ends of the equal-height sleeves and the top end surface of the upper template.

[0008] By adopting the above technical solution, the nitrogen spring has the characteristic of compression, so the upper template can be controlled by the pressure plate to roll the wooden board multiple times in one stroke, and the rebound of the wooden board after bending is smaller, thereby increasing the bending accuracy of the wooden board.

[0009] In a further embodiment, the heating device includes a water circuit arranged inside the lower mold cavity, a heater arranged at the bottom end of the lower mold cavity, and a pipe joint for connecting the heater and the water circuit, and a pressure relief valve is arranged at one end of the pipe joint.

[0010] By adopting the above technical solution, since a plurality of receiving grooves are provided, in order to prevent the heated wooden board from being cooled down quickly after being placed in the receiving groove, the lower mold cavity needs to be insulated to a certain extent by a heating device.

[0011] In a further embodiment, a plurality of reciprocating and staggered reinforcing ribs are disposed on the top of the support frame.

[0012] In a further embodiment, a pressure sensor is provided at the connection between the hydraulic cylinder and the pressure plate.

[0013] In a further embodiment, an infrared proximity switch is provided on the periphery of the workbench.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. The spring sheet can be bent into different arcs under the drive of multiple hydraulic telescopic rods. The wooden board to be bent is placed in the receiving groove and finally shaped under the pressure of the upper template. In this way, the wooden board can be bent at different angles, and the wooden board can be pre-bent by adjusting the relative position of the hydraulic telescopic rod and the spring sheet in the same receiving groove. Because there are multiple receiving grooves, multiple wooden boards of the same size or multiple wooden boards of different sizes can be bent at the same time, which greatly increases the bending efficiency and the bending accuracy.

[0016] 2. A plurality of nitrogen springs are arranged at the bottom of the pressing plate, and the bottom end of the nitrogen spring is fixedly connected to the upper template, so that the nitrogen spring has the compression characteristic. Therefore, the upper template can be controlled to roll the wooden board multiple times in one stroke under the drive of the pressing plate. The wooden board has smaller rebound after bending, which increases the bending accuracy of the wooden board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the accommodating groove of the lower mold cavity of the utility model.

[0019] In the figure, 1. workbench; 2. support frame; 3. hydraulic cylinder; 4. guide column; 5. pressure plate; 6. upper mold plate; 7. lower mold cavity; 8. heating device; 9. hydraulic telescopic rod; 10. roller; 11. spring sheet; 12. nitrogen spring; 13. equal height sleeve. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description of this specification, the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from a particular component geometry, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this specification, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] Embodiment 1:

[0023] like Figure 1-2 As shown, a bending device for the wooden part of a chair comprises a workbench 1, a support frame 2 is arranged on the top of the workbench 1, a hydraulic cylinder 3 is arranged at the bottom center position of the support frame 2, a guide column 4 is arranged on the top of the workbench 1, a pressing plate 5 is slidably installed on the guide column 4, the hydraulic cylinder 3 is fixedly connected to the pressing plate 5, an upper template 6 is arranged at the bottom of the pressing plate 5, a lower mold cavity 7 corresponding to the upper template 6 is arranged on the top of the workbench 1, a heating device 8 is arranged inside the lower mold cavity 7, a plurality of accommodating grooves are arranged at equal intervals on the top of the lower mold cavity 7, a plurality of hydraulic telescopic rods 9 are arranged at equal intervals inside the accommodating grooves, and a roller shaft 10 is rotatably installed on the top of each hydraulic telescopic rod 9. A spring sheet 11 located above the roller shaft 10 is arranged inside the accommodating groove, and the periphery of the spring sheet 11 is in contact with the inner wall of the accommodating groove. A first slide groove and a second slide groove are symmetrically arranged at the inner bottom end of the accommodating groove. The spring sheet 11 is provided with a first extension end located inside the first slide groove, and the spring sheet 11 is provided with a second extension end located inside the second slide groove. A plurality of nitrogen springs 12 are arranged at the bottom of the pressing plate 5, and the bottom end of the nitrogen spring 12 is fixedly connected to the upper template 6, and the top end of the nitrogen spring 12 is fixedly connected to the pressing plate 5. The four corners of the bottom of the pressing plate 5 are provided with equal height sleeves 13, and there is a gap between the bottom end of the equal height sleeve 13 and the top end surface of the upper template 6. The spring sheet can be bent into different curvatures under the drive of multiple hydraulic telescopic rods, and the wooden board to be bent is placed in the receiving groove, and is finally shaped under the pressure of the upper template. In this way, the wooden board can be bent at different angles, and the wooden board can be pre-bent by adjusting the relative position of the hydraulic telescopic rod and the spring sheet inside the same receiving groove. Because there are multiple receiving grooves, multiple wooden boards of the same size or multiple wooden boards of inconsistent sizes can be bent at the same time, which greatly increases the bending efficiency and the bending accuracy. Multiple nitrogen springs are arranged at the bottom of the pressing plate, and the bottom end of the nitrogen spring is fixedly connected to the upper template, which can play the role of the nitrogen spring. It has the characteristic of compression, so the upper template can be controlled by the pressure plate to roll the wooden board multiple times in one stroke again. The wooden board after bending has smaller rebound, which increases the bending accuracy of the wooden board. Because the pressure plate and the upper template are constantly applying pressure to both ends of the nitrogen spring during the downward pressing process, and because the pressure plate continues to move downward during the downward pressing process, the nitrogen spring will continuously absorb resistance and then balance the rebound process. Therefore, the wooden board will be pressed multiple times during a single downward pressing and bending process, and the upper template is provided with a plurality of dense protrusions corresponding to the internal structure of the lower mold cavity accommodating groove. The bottom ends of these protrusions are provided with plug-in interfaces, which can be plugged with pressure blocks of different degrees to cooperate with the curvature of the spring plate for adjusting the curvature in the lower mold cavity.

[0024] like Figure 1-2As shown, the heating device 8 includes a water channel arranged inside the lower mold cavity 7, a heater arranged at the bottom of the lower mold cavity 7, and a pipe joint for connecting the heater and the water channel. A pressure relief valve is arranged at one end of the pipe joint. Because multiple accommodating grooves are arranged, in order to avoid the heated wooden board from being cooled down quickly after being placed in the accommodating groove, the lower mold cavity needs to be insulated to a certain extent by the heating device, and the insulation temperature is between 20-30 degrees Celsius. The top of the support frame 2 is provided with multiple reciprocating and staggered reinforcing ribs, a pressure sensor is arranged at the connection between the hydraulic cylinder 3 and the pressing plate 5, and an infrared proximity switch is arranged at the periphery of the workbench 1.

[0025] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A device for bending the wooden part of a chair, characterized in that: The invention comprises a workbench (1), wherein a support frame (2) is arranged at the top of the workbench (1), a hydraulic cylinder (3) is arranged at the center position of the bottom of the support frame (2), a guide column (4) is arranged at the top of the workbench (1), a pressing plate (5) is slidably mounted on the guide column (4), the hydraulic cylinder (3) is fixedly connected to the pressing plate (5), an upper mold plate (6) is arranged at the bottom of the pressing plate (5), a lower mold cavity (7) corresponding to the upper mold cavity (6) is arranged at the top of the workbench (1), a heating device (8) is arranged inside the lower mold cavity (7), and the top of the lower mold cavity (7) is provided with a heating device (8). A plurality of accommodating grooves are arranged at equal intervals, a plurality of hydraulic telescopic rods (9) are arranged at equal intervals inside the accommodating grooves, a roller shaft (10) is rotatably mounted on the top end of each of the hydraulic telescopic rods (9), a spring sheet (11) located above the roller shaft (10) is arranged inside the accommodating groove, the periphery of the spring sheet (11) is in contact with the inner wall of the accommodating groove, a first slide groove and a second slide groove are symmetrically arranged at the inner bottom end of the accommodating groove, the spring sheet (11) is provided with a first extending end located inside the first slide groove, and the spring sheet (11) is provided with a second extending end located inside the second slide groove.

2. A chair wooden part bending device according to claim 1, characterized in that: A plurality of nitrogen springs (12) are arranged at the bottom of the pressing plate (5), the bottom ends of the nitrogen springs (12) are fixedly connected to the upper mold plate (6), the top ends of the nitrogen springs (12) are fixedly connected to the pressing plate (5), and the four corners of the bottom of the pressing plate (5) are provided with equal-height sleeves (13), and there is a gap between the bottom ends of the equal-height sleeves (13) and the top end surface of the upper mold plate (6).

3. The device for bending the wooden part of a chair according to claim 1, characterized in that: The heating device (8) comprises a water channel arranged inside the lower mold cavity (7), a heater arranged at the bottom end of the lower mold cavity (7), and a pipe joint for connecting the heater and the water channel, and a pressure relief valve is arranged at one end of the pipe joint.

4. The device for bending the wooden part of a chair according to claim 1, characterized in that: The top of the support frame (2) is provided with a plurality of reciprocating and staggered reinforcing ribs.

5. The device for bending the wooden part of a chair according to claim 1, characterized in that: A pressure sensor is provided at the connection between the hydraulic cylinder (3) and the pressure plate (5).

6. The device for bending the wooden part of a chair according to claim 1, characterized in that: An infrared proximity switch is arranged on the periphery of the workbench (1).

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