Metal pipe bending device

Abstract

The application discloses a metal pipe fitting cold bending processing device, which comprises an operation table, the surface of the operation table is provided with a pipe bending seat and a rotating seat, the rotating seat can be directionally rotated around the pipe bending seat, the rotating plane of the rotating seat is parallel to the surface of the operation table, the rotating seat and the pipe bending seat are provided with scale marks correspondingly, and a first accommodating groove and a second accommodating groove are correspondingly arranged on the sides close to each other, the first accommodating groove extends along the arc direction, the second accommodating groove extends along the straight line direction, and a workpiece fixing block is hinged to the outside of the first accommodating groove; in the rotating direction of the rotating seat, the rotating seat and the pipe bending seat have corresponding initial zero point positions, and the scale marks on the pipe bending seat are distributed in an increasing or decreasing mode along the bending direction of the first accommodating groove; the operation table is provided with a first limiting piece which can be directionally linearly moved and a second limiting piece which can be directionally arcuately moved, and the length of the workpiece and the bending arc length are respectively limited, so that the workpiece can be formed in place once without the need of measurement, and the skill requirement can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of pipe bending equipment technology, and more particularly to a cold bending processing device for metal pipes. Background Technology

[0002] When cold bending metal pipes, it is generally necessary to apply force while observing the scale to ensure that they are bent to the appropriate position, which requires a high level of skill from the operator.

[0003] In addition, in the existing technology, the length and curvature of metal pipes are controlled separately, requiring separate measurement and operation, which is a complicated process and limits the efficiency of cold bending, especially for bending operations of small batches of multi-specification metal pipes (such as multiple pipe length specifications and bending arc length specifications). Summary of the Invention

[0004] This application provides a metal pipe cold bending processing device, which can preset the pipe length and bending arc, without measurement, and form in one step, thereby effectively reducing skill requirements and improving work efficiency. It is especially suitable for cold bending operations of metal pipes of multiple specifications and small batches.

[0005] This application provides a cold bending device for metal pipe fittings, including an operating table. The surface of the operating table is provided with a bending seat and a rotating seat. The rotating seat is connected to the bending seat in a manner that allows it to rotate about the bending seat in an directional direction. The rotation plane of the rotating seat is parallel to the surface of the operating table. The rotating seat and the bending seat are respectively provided with scale marks. The bending seat and the rotating seat are respectively provided with a first receiving groove and a second receiving groove on their adjacent sides. The first receiving groove extends along the rotation direction of the rotating seat, and the second receiving groove extends along a straight line. A workpiece fixing block is hinged to the outside of the first receiving groove of the bending seat. In the rotation direction of the rotating seat, the rotating seat and the bending seat have corresponding initial zero point positions, i.e. zero point scale marks. The scale marks on the bending seat are distributed in an increasing or decreasing manner along the bending direction of the first receiving groove. The operating table is provided with a first limiting member that can move linearly and a second limiting member that can move in an arc. The first limiting member is directly opposite the first receiving groove and the second receiving groove when they are in the initial zero position, and the linear movement direction of the first limiting member is the extension direction of the second receiving groove. The second limiting member is located on the rotation trajectory of the rotating seat, and the arc movement direction of the second limiting member is parallel to the bending direction of the first receiving groove.

[0006] In one possible implementation, the operating table has a first guide groove for the first limiting member to move in a directional manner. At least two first guide rods are sequentially arranged in the first guide groove, and the at least two first guide rods are connected to a first limiting plate. The first guide rods are detachably mounted on the operating table, and the first limiting plate abuts against the surface of the operating table when it is installed in place.

[0007] In one possible implementation, the first limiting member is a plate-shaped member facing the second receiving groove, and the first limiting member is vertically connected to the top of the first limiting plate.

[0008] In one possible implementation, the first limiting member has a reinforcing rib plate connected to its outer side away from the rotating seat, the reinforcing rib plate extending obliquely and connected to the first limiting plate at its other end.

[0009] In one possible implementation, the operating table has a second guide groove for the second limiting member to move in a directional manner. At least two second guide rods are sequentially arranged in the second guide groove, and the at least two second guide rods are connected to a second limiting plate. The second guide rods are detachably mounted on the operating table. When the second limiting plate is installed in place, it abuts against the surface of the operating table. The second limiting member is vertically connected to the top of the second limiting plate.

[0010] In one possible implementation, both the first guide rod and the second guide rod are screws, which pass through the first guide groove and the second guide groove respectively, and are fitted with fastening nuts at the bottom of the operating table.

[0011] In one possible implementation, the bend seat has a fixed handle at the end away from the rotary seat, and the fixed handle is fixedly connected to the operating table by fasteners.

[0012] In one possible implementation, the rotating seat has a rotating handle connected to the end away from the first limiting member.

[0013] In one possible implementation, the first guide groove is an arc-shaped groove, and at least two rotatable guide wheels are spaced apart along the extension direction in the second receiving groove, with the grooves of the guide wheels facing the first receiving groove.

[0014] In one possible implementation, the bottom of the rotating seat is connected to a hinge arm, the other end of which is inserted into the bend seat from the bottom, and the bend seat is provided with a bearing structure that cooperates with the hinge arm.

[0015] Beneficial effects: Compared with the prior art, the metal pipe cold bending processing device provided in this application, by setting a first limiting member that can move linearly and a second limiting member that can move in an arc, can not only cold bend the workpiece in one step by setting the positions of the two limiting members, but also reduce the skill requirements by eliminating the need for observation or measurement during the bending process. Furthermore, the length and curvature can be combined and controlled by flexibly adjusting the positions of the two limiting members. It is suitable for cold bending processing of workpieces of different specifications, especially for cold bending processing of multiple specifications in small batches, with good quality stability and high work efficiency.

[0016] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the metal pipe cold bending processing device of this application is shown.

[0018] Figure 2 This application shows Figure 1 Enlarged structural diagram of part A in the middle.

[0019] Figure 3 A rear view structural schematic diagram of the metal pipe cold bending processing apparatus of this application is shown.

[0020] Figure 4 A top view of the metal pipe cold bending processing apparatus of this application is shown.

[0021] Figure 5 A partial structural schematic diagram of the metal pipe cold bending processing apparatus of this application is shown. Detailed Implementation

[0022] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0023] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will also be understood that terms, such as those defined in commonly used dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein.

[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0026] refer to Figures 1 to 5 This application provides a cold bending device for metal pipe fittings, including an operating table 10. The surface of the operating table 10 is provided with a bending seat 20 and a rotating seat 30. The rotating seat 30 is connected to the bending seat 20 in a manner that allows it to rotate about the bending seat 20, and the plane of rotation of the rotating seat 30 is parallel to the surface of the operating table 10. The rotating seat 30 and the bending seat 20 are respectively provided with scale marks 21. The bending seat 20 and the rotating seat 30 are respectively provided with a first receiving groove 201 and a second receiving groove 301 on their adjacent sides for placing and bending a workpiece 40. The first receiving groove 201 extends along the rotation direction of the rotating seat 30, and the second receiving groove 301 extends in a straight line. A workpiece fixing block 22 is hinged to the outside of the first receiving groove 201 of the bending seat 20 for fixing the workpiece 40 after it is placed in position, i.e., applying a counter-force to the workpiece 40 in conjunction with the rotating seat 30 during the bending process. In the rotation direction of the rotating seat 30, the rotating seat 30 and the bending seat 20 have corresponding initial zero point positions, i.e. zero point scale marks. At the same time, the scale marks 21 on the bending seat 20 are distributed in an increasing or decreasing manner along the bending direction of the first receiving groove 201, which is used to facilitate the viewing of the length of the bent part of the workpiece 40, i.e. arc length. The operating table 10 is provided with a first limiting member 11 that can move linearly and a second limiting member 12 that can move in an arc. The first limiting member 11 is directly opposite the first receiving groove 201 and the second receiving groove 301 when they are in the initial zero position, and the linear movement direction of the first limiting member 11 is the extension direction of the second receiving groove 301. It is used to initially position the workpiece 40. The position of the first limiting member 11 can be flexibly adjusted when there are different length requirements. When bending, the workpiece 40 only needs to be inserted into the first receiving groove 201 and the second receiving groove 301 and then abut against the first limiting member 11. The second limiting member 12 is located on the rotation trajectory of the rotating seat 30, and the arc movement direction of the second limiting member 12 is parallel to the bending direction of the first receiving groove 201. It is used to limit the bending length of the workpiece 40. During the bending process, when the rotating seat 30 abuts against the second limiting member 12, it means that the workpiece 40 is bent into place. Therefore, through this integrated bidirectional positioning, the workpiece 40 can be formed in one step without any measurement when cold bending, which can greatly reduce the skill requirements, improve the efficiency of pipe bending, and ensure the quality of cold bending. It is especially suitable for small and micro enterprises to cold bend workpieces 40 of different lengths and arc lengths in small batches.

[0027] In some embodiments, the operating table 10 has a first guide groove 101 for the first limiting member 11 to move in an orientation. At least two first guide rods 111 are sequentially arranged in the first guide groove 101, and the at least two first guide rods 111 are connected to a first limiting plate 112 to ensure that the first limiting plate 112 can move in an orientation stable within the first guide groove 101. The first guide rods 111 are detachably mounted on the operating table 10. That is, the first guide rods 111 can not only be fixed on the operating table 10 to ensure the initial positioning of the first limiting member 11, but also be flexibly moved and adjusted to suit workpieces 40 with different length requirements for cold bending. When the first limiting plate 112 is installed in place, it abuts against the surface of the operating table 10, so that the two have a relatively large contact area and better connection stability.

[0028] More preferably, the first limiting member 11 is a plate-shaped member or simply a limiting plate, and is directly opposite the second receiving groove 301. At the same time, the first limiting member 11 is vertically connected to the top of the first limiting plate 112, so that the first limiting member 11 can provide a larger positioning area, which facilitates quick positioning of the workpiece 40.

[0029] In some embodiments, the first limiting member 11 is connected to a reinforcing rib 113 on its outer side away from the rotating seat 30. The reinforcing rib 113 extends obliquely and is connected to the first limiting plate 112 at the other end, thereby improving the structural strength of the first limiting member 11 and extending its service life through the reinforcing rib 113.

[0030] In some embodiments, the operating table 10 has a second guide groove 102 for the second limiting member 12 to move in an orienting manner. At least two second guide rods are sequentially arranged within the second guide groove 102, and these two guide rods are connected to a second limiting plate to ensure stable orienting of the second limiting plate within the second guide groove 102. The second limiting member 12 is vertically connected to the top of the second limiting plate. The second guide rods are detachably mounted on the operating table 10; that is, the second guide rods can not only be fixed to the operating table 10 to ensure the initial positioning of the second limiting member 12, but also be flexibly moved and adjusted to suit workpieces 40 with different arc length requirements during cold bending. When the second limiting plate is installed in place, it rests against the surface of the operating table 10, resulting in a relatively large contact area and better connection stability. The second guide rods and the second limiting plate have the same or similar structure and function as the first guide rod 111 and the first limiting plate 112, respectively; therefore, the complete structure of the second guide rods and the second limiting plate is not shown here.

[0031] In some embodiments, both the first guide rod 111 and the second guide rod are screws, which are standard parts, easy to procure or manufacture, and can ensure quality. The screws pass through the first guide groove 201 and the second guide groove 301 respectively, and a fastening nut 13 is sleeved and connected to the bottom of the operating table 10.

[0032] In some embodiments, the bend seat 20 is connected to a fixed handle 23 at the end away from the rotating seat 30. The fixed handle 23 is fixedly connected to the operating table by a fastener 24. The fastener 24 can be a fastening seat or a fastening bracket, used to firmly fix the fixed handle 23 to the operating table 10. For example, the fastener 24 is provided with a channel for placing the fixed handle, and a clamping plate is provided around the channel for clamping and fixing. Alternatively, a fastening screw is provided around the channel for tightening and fixing. Or, the fastener is fixed together with the clamping plate by fastening the screw.

[0033] In some embodiments, the rotating base 30 is connected to a rotating handle 31 at the end away from the first limiting member 11 to facilitate rotation operation.

[0034] In some embodiments, the first guide groove 201 is an arc-shaped groove. At least two rotatable guide wheels 32 are spaced apart along the extending direction within the second receiving groove 301, with the grooves of the guide wheels 32 facing the first receiving groove 201. This allows a dynamic, low-friction floating guide channel to be constructed using the at least two rotatable guide wheels 32. On the one hand, during the pipe bending process, there is a huge extrusion force and relative displacement between the outer wall of the pipe and the mold. If a fixed guide groove is used, the outer wall of the pipe will be violently stretched due to sliding friction, resulting in scratches, flattening, or even wrinkles. However, by using multiple spaced and rotatable guide wheels 32, the resistance when the pipe moves forward becomes the rolling friction of the guide wheels, which can greatly reduce the resistance and effectively avoid scratches on the pipe wall. This is especially suitable for soft metal pipes (such as copper pipes and aluminum pipes) and pipes with coatings on the surface. On the other hand, during pipe bending, the bending radius and stress point of the pipe change in real time. A fixed mold groove can hardly perfectly accommodate this dynamic change. The guide wheel 32 design typically features grooves (such as V-shaped or arc-shaped) on its surface, forming a dynamic "guide groove" between the two wheels. When force is applied by rotating the handle, the guide wheel 32 adaptively rotates with the bending direction of the pipe, always maintaining line or surface contact with the pipe. This design precisely constrains the direction of the pipe, thus preventing the pipe from sliding laterally or arching upwards during bending, ensuring a smooth bending plane and precise angles. Thirdly, this design offers deeper technological benefits. The enveloping constraint of the guide rollers 32 acts as a moving "anti-deformation" support near the bending point. This effectively counteracts the tendency of the outer wall of the pipe to thin under tension and the inner wall to wrinkle under pressure during bending. Furthermore, at least one of the guide rollers 32 provides guidance, and at least one provides clamping. This coordinated design allows the guide rollers 32 to firmly press the pipe onto the bend seat, preventing the pipe cross-section from collapsing from a circular shape to an elliptical one. This is particularly crucial in thin-walled pipe processing, significantly improving the roundness and flow performance of the finished product.

[0035] In some embodiments, the bottom of the rotating seat 30 is connected to a hinge arm 33, and the other end of the hinge arm 33 is inserted into the bent tube seat 20 from the bottom of the bent tube seat 20. The bent tube seat 20 is provided with a bearing structure that cooperates with the hinge arm 33, so that the rotating seat 30 can be stably rotated along a preset trajectory by means of the hinge arm 33.

[0036] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0037] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A cold bending device for metal pipe fittings, characterized in that, The device includes an operating table, the surface of which is provided with a bending seat and a rotating seat. The rotating seat is connected to the bending seat in a manner that allows it to rotate about the bending seat in an directional direction, and the rotation plane of the rotating seat is parallel to the surface of the operating table. The rotating seat and the bending seat are respectively provided with scale marks. The bending seat and the rotating seat are respectively provided with a first receiving groove and a second receiving groove on their adjacent sides. The first receiving groove extends along the rotation direction of the rotating seat, and the second receiving groove extends along a straight line. A workpiece fixing block is hinged to the outside of the first receiving groove of the bending seat. In the rotation direction of the rotating seat, the rotating seat and the bending seat have corresponding initial zero point positions, i.e. zero point scale marks. The scale marks on the bending seat are distributed in an increasing or decreasing manner along the bending direction of the first receiving groove. The operating table is provided with a first limiting member that can move linearly and a second limiting member that can move in an arc. The first limiting member is directly opposite the first receiving groove and the second receiving groove when they are in the initial zero position, and the linear movement direction of the first limiting member is the extension direction of the second receiving groove. The second limiting member is located on the rotation trajectory of the rotating seat, and the arc movement direction of the second limiting member is parallel to the bending direction of the first receiving groove.

2. The cold bending apparatus for metal pipe fittings as described in claim 1, characterized in that, The operating table has a first guide groove for the first limiting member to move in a directional manner. At least two first guide rods are arranged in sequence in the first guide groove, and the at least two first guide rods are connected to a first limiting plate. The first guide rods are detachably mounted on the operating table, and the first limiting plate is attached to the surface of the operating table when it is installed in place.

3. The cold bending apparatus for metal pipe fittings as described in claim 2, characterized in that, The first limiting member is a plate-shaped member and faces the second receiving groove. The first limiting member is vertically connected to the top of the first limiting plate.

4. The cold bending apparatus for metal pipe fittings as described in claim 3, characterized in that, The first limiting member has a reinforcing rib plate connected to its outer side away from the rotating seat. The reinforcing rib plate extends obliquely and is connected to the first limiting plate at its other end.

5. The cold bending apparatus for metal pipe fittings as described in claim 2, characterized in that, The operating table has a second guide groove for the second limiting member to move in a directional manner. At least two second guide rods are arranged in sequence in the second guide groove, and the at least two second guide rods are connected to a second limiting plate. The second guide rods are detachably mounted on the operating table. When the second limiting plate is installed in place, it abuts against the surface of the operating table. The second limiting member is vertically connected to the top of the second limiting plate.

6. The cold bending apparatus for metal pipe fittings as described in claim 5, characterized in that, Both the first guide rod and the second guide rod are screw rods, which pass through the first guide groove and the second guide groove respectively, and are fitted with fastening nuts at the bottom of the operating table.

7. The cold bending apparatus for metal pipe fittings as described in claim 1, characterized in that, The bend seat has a fixed handle at the end away from the rotating seat, and the fixed handle is fixedly connected to the operating table by fasteners.

8. The cold bending apparatus for metal pipe fittings as described in claim 1, characterized in that, The rotating seat has a rotating handle connected to the end away from the first limiting member.

9. The cold bending apparatus for metal pipe fittings as described in claim 8, characterized in that, The first guide groove is an arc-shaped groove, and at least two rotatable guide wheels are provided at intervals along the extension direction in the second receiving groove, with the grooves of the guide wheels facing the first receiving groove.

10. The cold bending apparatus for metal pipe fittings as described in claim 8, characterized in that, The bottom of the rotating seat is connected to a hinge arm, and the other end of the hinge arm is inserted into the bent tube seat from the bottom of the bent tube seat. The bent tube seat is provided with a bearing structure that cooperates with the hinge arm.

Images