Scratch-proof bending device and bending machine

Abstract

The utility model discloses a scratch-proof bending device and a bending machine. The scratch-proof bending device comprises a pressing assembly and a bending assembly. A pressing air cylinder in the pressing assembly is in pneumatic connection with an upper positioning tool, a lower positioning tool is detachably installed on a motor shaft of a bending machine for transmission feeding, and the upper positioning tool and the lower positioning tool correspond to each other in the vertical direction. A rotating part in the bending assembly comprises a rotating disc and a connecting plate, the rotating disc rotates around the circle center of the rotating disc, the connecting plate is fixed to the outer edge of the rotating disc, a bending fixed wheel is fixed to the circle center of the rotating disc, a movable wheel air cylinder is fixed to the connecting plate, the movable wheel air cylinder is pneumatically connected with the connecting part, and a bending movable wheel is rotationally connected with the connecting part. Through cooperation of the bending movable wheel and the bending fixed wheel, when the workpiece to be bent is bent, the problem that the workpiece to be bent is scratched due to extrusion and friction of the bending movable wheel and the bending fixed wheel can be effectively solved. And the lower positioning tool can be replaced according to the pipe diameter of the to-be-bent workpiece, so that the scratch-proof bending device can be suitable for the to-be-bent workpieces with different sizes.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to an anti-scratch bending device and a bending machine. Background Art

[0002] Bending machines are extremely widely used in modern industrial production. They can bend metal sheets with different thicknesses into required shapes, such as angle steels, U-shaped grooves, flat tubes, etc. These bent sheets have a wide range of applications in various industries, such as doors and windows in the construction industry, car bodies in the automotive manufacturing industry, parts in the machinery manufacturing industry, etc.

[0003] However, when traditional bending machines bend pipe parts, it will cause deformation and scratches on the surface of the pipe parts, which will have an adverse impact on the appearance of the product and may also affect its functional performance, thus posing challenges to the product quality. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides an anti-scratch bending device and a bending machine.

[0005] The technical problems to be solved by the present invention are realized through the following technical solutions:

[0006] In a first aspect, the present invention provides an anti-scratch bending device, including a pressing component and a bending component; the pressing component includes a pressing cylinder, an upper positioning tooling and a lower positioning tooling; wherein, the pressing cylinder is pneumatically connected to the upper positioning tooling; the lower positioning tooling is detachably installed on the motor shaft of the bending machine for driving and feeding; the upper positioning tooling and the lower positioning tooling are corresponding in the up-and-down position;

[0007] The bending component includes a moving wheel cylinder, a bending moving wheel, a bending fixed wheel, a connecting part and a rotating part; wherein, the rotating part includes a turntable and a connecting plate; the turntable rotates around the center of the turntable; the connecting plate is fixed to the outer edge of the turntable; the bending fixed wheel is fixed to the center of the turntable; the moving wheel cylinder is fixed to the connecting plate; the moving wheel cylinder is pneumatically connected to the connecting part; the bending moving wheel is rotatably connected to the connecting part.

[0008] Optionally, the connecting part includes a pin and a bracket;

[0009] One end of the bracket is pneumatically connected to the moving wheel cylinder, and the other end is rotatably connected to the bending moving wheel through the pin.

[0010] Optionally, a rubber pad is fixed to the lower end of the upper positioning tooling to contact the workpiece to be bent through the rubber pad.

[0011] Optionally, the Shore hardness range of the rubber pad is 80A to 85A.

[0012] Optionally, the material of the rubber pad is elastic rubber PU.

[0013] Optionally, the diameter of the bending moving wheel is D2 = (1.5 - 2)D1; where D1 is the diameter of the bending fixed wheel.

[0014] Optionally, the bending fixed wheel is provided with a first groove; the width of the first groove is d1 = d0 + 0.2 mm, where d0 is the diameter of the workpiece to be bent, and 0.2 mm is the radius of the chamfer arc of the first groove.

[0015] Optionally, the bending moving wheel is provided with a second groove; the width of the second groove is d2 = d0 + 0.2 mm; where d0 is the diameter of the workpiece to be bent, and 0.2 mm is the radius of the chamfer arc of the second groove.

[0016] Optionally, the material of the bending moving wheel is MC nylon; the Rockwell hardness of the bending fixed wheel is greater than 60 hrc.

[0017] In a second aspect, the present invention provides a bending machine, including any one of the above anti-scratch bending devices.

[0018] An anti-scratch bending device provided by the present invention can effectively improve the scratch problem caused by the extrusion and friction of the bending moving wheel and the bending fixed wheel on the workpiece to be bent when bending the workpiece to be bent through the cooperation of the bending moving wheel and the bending fixed wheel. Moreover, the lower positioning tooling is detachably installed on the motor shaft of the transmission and feeding of the bending machine, so the lower positioning tooling can be replaced according to the pipe diameter of the workpiece to be bent, so that the anti-scratch bending device provided by the embodiment of the present invention can be applicable to workpieces to be bent of different sizes.

[0019] The following will further describe the present invention in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an anti-scratch bending device provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic working process diagram of the bending device provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the dimensions of the bending moving wheel and the bending fixed wheel provided by an embodiment of the present invention.

[0023] Reference numerals: 1, pressing cylinder; 2, upper positioning tooling; 3, rubber pad; 4, lower positioning tooling; 5, moving wheel cylinder; 6, bracket; 7, pin; 8, bending moving wheel; 9, bending fixed wheel; 10, turntable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described in detail below in conjunction with specific embodiments, but the implementation manners of the present invention are not limited thereto.

[0025] In order to solve the problem that when a traditional bending machine bends a pipe part, it will cause deformation and scratches on the surface of the pipe part, which has an adverse effect on the appearance of the product and may also affect its functional performance, thus posing a challenge to the product quality, an anti-scratch bending device is provided in an embodiment of the present invention. Refer to Figure 1 , Figure 1 FIG. is a schematic structural diagram of an anti-scratch bending device provided in an embodiment of the present invention, including a pressing assembly and a bending assembly.

[0026] In the embodiment of the present invention, the pressing assembly includes a pressing cylinder 1, an upper positioning tooling 2, and a lower positioning tooling 4. Among them, the pressing cylinder 1 is pneumatically connected to the upper positioning tooling 2; the lower positioning tooling 4 is detachably installed on the motor shaft of the transmission and feeding of the bending machine; the upper positioning tooling 2 and the lower positioning tooling 4 are corresponding up and down.

[0027] In the embodiment of the present invention, since the lower positioning tooling 4 is detachably installed on the motor shaft of the transmission and feeding of the bending machine, the lower positioning tooling 4 can be replaced according to the size and material of the diameter of the workpiece to be bent.

[0028] In the embodiment of the present invention, the pressing assembly is used to fix the workpiece to be bent in the bending machine. Specifically, after the bending machine is started, the pressing cylinder 1 drives the upper positioning tooling 2 to move downward, pressing the workpiece to be bent on the lower positioning tooling 4 corresponding to the upper positioning tooling 2 up and down, so as to fix the workpiece to be bent.

[0029] In the embodiment of the present invention, the bending assembly includes a moving wheel cylinder 5, a bending moving wheel 8, a bending fixed wheel 9, a connecting part, and a rotating part. Among them, the rotating part includes a turntable 10 and a connecting plate; the turntable 10 rotates around the center of the turntable 10; the connecting plate is fixed to the outer edge of the turntable 10; the bending fixed wheel 9 is fixed to the center of the turntable 10; the moving wheel cylinder 5 is fixed to the connecting plate; the moving wheel cylinder 5 is pneumatically connected to the connecting part; the bending moving wheel 8 is rotatably connected to the connecting part.

[0030] In the embodiment of the present invention, the bending assembly is used to perform bending processing on the workpiece to be bent. Specifically, after the pressing assembly presses the workpiece to be bent, the moving wheel cylinder 5 drives the connecting part and the bending moving wheel 8 to move downward at the same time until the bending moving wheel 8 presses the workpiece to be bent on the bending fixed wheel 9, and then the rotating part starts to rotate around the center of the turntable 10, driving the bending moving wheel 8 to rotate along the bending fixed wheel 9 to bend the workpiece to be bent. When the required bending angle is reached, the rotating part stops rotating, and the bent workpiece is obtained.

[0031] In the embodiment of the present invention, the bending fixed wheel 9 is fixed at the center of the turntable 10. The bending fixed wheel 9 and the turntable 10 are concentric, but it does not rotate with the turntable 10.

[0032] In the embodiment of the present invention, the bending movable wheel 8 is rotatably connected to the connecting portion. When the rotating portion drives the bending movable wheel 8 to rotate along the bending fixed wheel 9, the bending movable wheel 8 will also rotate around its own center at the same time.

[0033] In the embodiment of the present invention, through the cooperation of the bending movable wheel 8 and the bending fixed wheel 9, when bending the workpiece to be bent, the scratching problem caused by the extrusion and friction of the bending movable wheel 8 and the bending fixed wheel 9 on the workpiece to be bent can be effectively improved. Moreover, the lower positioning tooling 4 is detachably installed on the motor shaft of the bending machine for driving and feeding. Therefore, the lower positioning tooling 4 can be replaced according to the pipe diameter of the workpiece to be bent, so that the anti-scratching bending device provided by the embodiment of the present invention can be applicable to workpieces to be bent of different sizes.

[0034] In the embodiment of the present invention, the connecting portion includes a pin 7 and a bracket 6; one end of the bracket 6 is pneumatically connected to the movable wheel cylinder 5, and the other end is rotatably connected to the bending movable wheel 8 through the pin 7.

[0035] In the embodiment of the present invention, one end of the bracket 6 of the connecting portion is rotatably connected to the bending movable wheel 8 through the pin 7. Therefore, in the bending component, when the turntable 10 drives the connecting portion, the pin 7 and the bending movable wheel 8 to rotate together, the bending movable wheel 8 will also rotate around the pin 7 as the central axis. Through the cooperation of the moving and fixed wheels of the bending movable wheel 8 and the bending fixed wheel 9, the scratching problem generated when bending the workpiece can be effectively improved.

[0036] In the embodiment of the present invention, the pin 7 is assembled with the inner hole of the bending movable wheel 8 and is in clearance fit. Clearance fit is a fitting method in machinery, specifically referring to a fit with a clearance (including a minimum clearance of zero), that is, there is a certain clearance between the contact surfaces of multiple parts. The clearance fit can reduce the wear between the pin 7 and the bending movable wheel 8, improve its service life, and improve the stability of the bending device.

[0037] In the embodiment of the present invention, a rubber pad 3 is fixed at the lower end of the upper positioning tooling 2 to contact the workpiece to be bent through the rubber pad 3. Since the rubber pad 3 has elasticity, it can effectively protect the workpiece to be bent from being pressed into deformation or scratched when the upper positioning tooling 2 presses the workpiece to be bent downward.

[0038] In the embodiment of the present invention, the Shore hardness range of the rubber pad 3 is 80A - 85A. The rubber pad 3 within this hardness range can provide good elasticity and support force while maintaining sufficient toughness and durability to ensure that it will not deform or break prematurely during use.

[0039] In the embodiment of the present invention, the material of the rubber pad 3 is preferably elastic rubber PU (polyurethane). The rubber pad of elastic rubber PU has better elasticity and resilience, can maintain its shape when subjected to greater stress, and has good wear resistance, and is suitable for scenes that require frequent deformation and recovery.

[0040] The working process of the bending device provided by the embodiment of the present invention is described below. Figure 2 , Figure 2 Schematic diagram of the working process of the bending device provided by the embodiment of the present invention. Figure 2 (a), first place the workpiece to be bent into the lower positioning fixture 4. Then, see Figure 2 (b), the upper positioning fixture 2 moves downward under the action of the pressing cylinder 1, so that the rubber pad 3 presses the workpiece to be bent onto the lower positioning fixture 4. Figure 2 (c), the moving wheel cylinder 5 pushes the bracket 6, the latch 7 and the bending moving wheel 8 to move downward, pressing the workpiece to be bent onto the bending fixed wheel 9. Figure 2 (d), the rotating part starts to rotate. Specifically, the rotating disk 10 rotates around the center of the rotating disk 10, driving the moving wheel cylinder 5 fixed to the connecting plate, the bracket 6 connected to the moving wheel cylinder 5, and the bending moving wheel 8 connected to the bracket 6 through the latch 7 to rotate together, and at the same time, the bending moving wheel 8 rotates with the latch 7 as the central axis. The bending moving wheel 8 rotates along the bending fixed wheel 9 to bend the workpiece to be bent. When it rotates to the required bending angle, the rotating disk 10 stops rotating, all components return to the starting position, and the bent workpiece is taken out, completing the entire bending process.

[0041] See also Figure 3 , Figure 3 : is a schematic diagram of the dimensions of the bending moving wheel 8 and the bending fixed wheel 9 provided in an embodiment of the present invention. In order to ensure the stability of the workpiece to be bent during the bending process, the diameter of the bending moving wheel 8 is set to be larger than the diameter of the bending fixed wheel 9. The bending moving wheel 8, as a driving wheel, generates a larger rotational torque through its larger diameter. The bending fixed wheel 9 mainly bears the role of supporting and positioning the workpiece to be bent, and its diameter is relatively small.

[0042] In the embodiment of the present invention, the diameter of the bending fixed wheel 9 can be set to D1, and the diameter of the bending movable wheel 8 can be set to D2, wherein D2 = (1.5-2) D1.

[0043] In addition, grooves are provided on the bending fixed wheel 9 and the bending movable wheel 8 for positioning the workpiece to be bent. The specific width of the groove is related to the diameter of the workpiece to be bent.

[0044] In the embodiment of the present invention, the bending fixed wheel 9 is provided with a first groove, and the width of the first groove is d1 = d0 + 0.2 mm, where d0 is the diameter of the workpiece to be bent, and 0.2 mm is the chamfer arc radius of the first groove. The bending moving wheel 8 is provided with a second groove, and the width of the second groove is d2 = d0 + 0.2 mm; where d0 is the diameter of the workpiece to be bent, and 0.2 mm is the chamfer arc radius of the second groove.

[0045] In the embodiment of the present invention, the chamfer of the groove is obtained by machining the edge of the workpiece into an inclined shape with a certain angle. By chamfering, the sharpness of the workpiece at the edge can be reduced, thereby reducing stress concentration, preventing cracking of the bending fixed wheel 9 and the bending moving wheel 8 when the force is large, and improving its safety performance.

[0046] In the embodiment of the present invention, the material of the bending moving wheel 8 is MC (Monomer casting) nylon. MC nylon has high mechanical strength, stiffness, and hardness, and can withstand large external forces without obvious deformation, thus ensuring the stable operation of the bending moving wheel 8. At the same time, MC nylon has high toughness, good wear resistance and aging resistance, so it is not easy to break, wear or age, and is more durable. In addition, the excellent mechanical vibration damping ability of MC nylon can improve the running stability of the bending moving wheel 8, and its good sliding property can reduce the friction between the bending moving wheel 8 and the workpiece to be bent, thus avoiding the problem of the workpiece to be bent being scratched and protecting the machining accuracy and quality. The excellent machining performance of MC nylon can achieve precise and stable position control without creep phenomenon when precisely and effectively controlled. And during the use of MC nylon, the dimensional stability is good, which is more suitable for applications with high-precision dimensional control.

[0047] In the embodiment of the present invention, the Rockwell hardness of the bending fixed wheel 9 being greater than 60 hrc indicates that it has a high hardness. Rockwell hardness is a hardness test method, and the higher the value, the harder the material. The bending fixed wheel 9 with a high Rockwell hardness can provide stronger support force. At the same time, the high Rockwell hardness also helps to improve the durability and service life of the bending fixed wheel 9, ensuring that the bending fixed wheel 9 can maintain stability and reliability during the bending process.

[0048] Based on the same inventive concept, the embodiment of the present invention also provides a bending machine, including any one of the above anti-scratching bending devices.

[0049] It should be noted that the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention.

[0050] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0051] Although the present invention has been described in connection with various embodiments herein, however, in the process of implementing the claimed present invention, those skilled in the art can understand and implement other variations of the disclosed embodiments by viewing the accompanying drawings and the disclosure. In the description of the present invention, the term "including" does not exclude other components or steps, the term "a" or "an" does not exclude a plurality of cases, and the meaning of "a plurality" is two or more, unless otherwise specifically defined. In addition, certain measures are described in different embodiments, but this does not mean that these measures cannot be combined to produce good results.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0053] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A scratch-proof bending device, characterized in that, It includes a pressing component and a bending component; the pressing component includes a pressing cylinder, an upper positioning tooling and a lower positioning tooling; wherein, the pressing cylinder is pneumatically connected to the upper positioning tooling; the lower positioning tooling is detachably installed on the motor shaft of the transmission feeding of the bending machine; the upper positioning tooling and the lower positioning tooling are corresponding in the up and down positions; The bending component includes a moving wheel cylinder, a bending moving wheel, a bending fixed wheel, a connecting part and a rotating part; wherein, the rotating part includes a turntable and a connecting plate; the turntable rotates around the center of the turntable; the connecting plate is fixed on the outer edge of the turntable; the bending fixed wheel is fixed at the center of the turntable; the moving wheel cylinder is fixed on the connecting plate; the moving wheel cylinder is pneumatically connected to the connecting part; the bending moving wheel is rotatably connected to the connecting part.

2. The anti-scratch bending device according to claim 1, characterized in that, The connecting part includes a pin and a bracket; One end of the bracket is pneumatically connected to the moving wheel cylinder, and the other end is rotatably connected to the bending moving wheel through the pin.

3. The anti-scratch bending device according to claim 1, characterized in that, A rubber pad is fixed at the lower end of the upper positioning tooling to contact the workpiece to be bent through the rubber pad.

4. The anti-scratch bending device according to claim 3, wherein The Shore hardness range of the rubber pad is 80A - 85A.

5. The anti-scratch bending device according to claim 3, characterized in that, The material of the rubber pad is elastic rubber PU.

6. The anti-scratch bending device according to claim 1, wherein The diameter of the bending moving wheel is D2 = (1.5 - 2)D1; where D1 is the diameter of the bending fixed wheel.

7. The anti-scratch bending device according to claim 1, characterized in that, The bending fixed wheel is provided with a first groove; the width of the first groove is d1 = d0 + 0.2mm, where d0 is the diameter of the workpiece to be bent, and 0.2mm is the chamfer arc radius of the first groove.

8. The anti-scratch bending device according to claim 1, characterized in that, The bending moving wheel is provided with a second groove; the width of the second groove is d2 = d0 + 0.2mm; where d0 is the diameter of the workpiece to be bent, and 0.2mm is the chamfer arc radius of the second groove.

9. The anti-scratch bending device according to claim 1, wherein The material of the bending moving wheel is MC nylon; the Rockwell hardness of the bending fixed wheel is greater than 60 hrc.

10. A bending machine, characterized in that, It includes the anti-scratch bending device according to any one of claims 1 - 9.

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