Automatic clamping and turning device for pipe bending machine

Abstract

The utility model discloses an automatic clamping corner device for a pipe bending machine, which comprises a fixing plate, a die-in fixing seat arranged on the fixing plate through a left-right sliding device, a corner seat arranged on the die-in fixing seat through an up-down sliding device, a rotating die arranged on the corner seat through a rotating device, and a clamping device arranged on the rotating die. The rotating die can rotate relative to the center line of the rotating die through the rotating device; a clamping groove is inwards formed in the circumference of the rotary die, and the position of the clamping groove ensures that the center line of a pipe is overlapped with the center line of the rotary die when the pipe is placed at the bottom of the clamping groove; and a pipe clamping die assembly for clamping the pipe to abut against the bottom of the clamping groove is arranged on the corner seat. The device is arranged near a pipe bending wheel module on the pipe bending machine, assists the pipe bending wheel module in pipe bending, is simple and compact in structure and small in occupied space, can accurately guarantee the rotating angle of a pipe, and greatly improves the percent of pass of products.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending equipment technology, and in particular to an automatic clamping angle device for pipe bending machines. Background Technology

[0002] Pipe bending machines are mainly used for the plastic forming of pipes in metal processing, and are widely used in industries that require pipe bending, such as automobiles, power construction, highway and railway construction, bridges, and ships. In recent years, with the surge in pipe usage, the process requirements for pipe bending have also increased, prompting the market to demand higher and higher functions and performance from pipe bending machines.

[0003] like Figure 1 The image shows a multi-directional bent pipe produced by bending a straight pipe in two sections. The first section 11 is bent downwards relative to the second section 12, and the second section 12 is bent to the right relative to the third section 13. During the pipe bending process, since the position of the roller assembly in the pipe bending machine is usually fixed, when bending multi-directional bent pipes, the pipe needs to be rotated according to the different bending directions. Accurately ensuring the pipe's rotation angle directly affects the final bending quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic clamping angle device for a pipe bending machine that can accurately guarantee the rotation angle of the pipe.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: the automatic clamping corner device for a pipe bending machine includes: a fixed plate; an entry mold fixed seat is installed on the fixed plate via a left-right sliding device, and the entry mold fixed seat can move left and right relative to the fixed plate via the left-right sliding device; a corner seat is installed on the entry mold fixed seat via an up-down sliding device, and the corner seat can move up and down relative to the entry mold fixed seat via the up-down sliding device; a rotating mold is installed on the corner seat via a rotating device, and the rotating mold can rotate relative to the center line of the rotating mold via the rotating device; a slot is provided inward on the circumference of the rotating mold, the position of the slot ensuring that the center line of the pipe overlaps with the center line of the rotating mold when the pipe is placed at the bottom of the slot; a pipe clamping mold assembly is provided on the corner seat to clamp the pipe against the bottom of the slot.

[0006] To guide the pipe into the slot more smoothly, this solution has a flared guide groove at the upper end of the slot. In addition, in order to better clamp the pipe, the bottom of the slot is set as an arc-shaped bottom surface that matches the outer contour of the pipe.

[0007] Furthermore, in the aforementioned automatic clamping corner device for a pipe bending machine, the structure of the pipe clamping mold assembly is as follows: the cylinder body of the pipe clamping cylinder is hinged to the corner seat, the pipe clamping arm is hinged to the corner seat, one end of the pipe clamping arm is hinged to the piston rod end of the pipe clamping cylinder, and the other end of the pipe clamping arm is a clamping end with a clamping groove, the clamping groove being an arc-shaped groove corresponding to and matching the outer contour of the pipe; when the piston rod of the pipe clamping cylinder extends outward or retracts inward, it drives the pipe clamping arm to rotate around the hinge point between the pipe clamping arm and the corner seat, thereby clamping the pipe in the bottom of the groove or releasing the pipe located in the bottom of the groove.

[0008] Furthermore, in the aforementioned automatic clamping corner device for a pipe bending machine, a top-feeding assembly is provided on the corner seat. The structure of the top-feeding assembly is as follows: the cylinder body of the top-feeding cylinder is fixedly installed on the corner seat, and the piston rod of the top-feeding cylinder points to the pipe located at the bottom of the slot.

[0009] Furthermore, in the aforementioned automatic clamping corner device for a pipe bending machine, the structure of the rotating device is as follows: the rotating mold is movably mounted on the corner seat via a rotating support structure; a rotating mold gear is fixedly installed on the rotating mold; a clearance groove is provided on the rotating mold gear, and the clearance groove is located at a position corresponding to the slot; a servo motor is fixedly installed on the corner seat; the motor shaft of the servo motor is fixedly connected to a ball screw; a rotating mold rack is screwed into the ball screw; the rotating mold rack is mounted on the corner seat via a first linear guide rail, and the rotating mold rack meshes with the rotating mold gear; when the servo motor rotates forward or reverse, it drives the rotating mold rack to move upward or downward, thereby pushing the rotating mold gear to rotate forward or reverse.

[0010] In this solution, the ball screw is installed by setting a bearing housing with a bearing assembly on a fixed base, and the ball screw is supported by the bearing assembly.

[0011] There are various structural forms of left-right sliding devices available on the market. In principle, any left-right sliding device that can realize the left-right movement of the mold fixing seat relative to the fixed plate can be used on the automatic clamping corner device of the pipe bending machine. In this embodiment, considering the spatial arrangement of the overall structure and the ease of operation, the left-right sliding device is designed as follows: The structure of the left-right sliding device includes: a second linear guide rail, the mold fixing seat is set on the fixed plate through the second linear guide rail, a movable mold cylinder seat is fixedly installed on the fixed plate, the cylinder body of the movable mold cylinder is fixedly installed on the movable mold cylinder seat, and the end of the piston rod of the movable mold cylinder is fixedly connected to the mold fixing seat; when the piston rod of the movable mold cylinder retracts inward or extends outward, it drives the mold fixing seat to move left and right along the second linear guide rail.

[0012] There are various structural forms of upward and downward sliding devices on the market. In principle, any upward and downward sliding device that can realize the vertical movement of the corner seat relative to the mold entry fixed seat can be used on the automatic clamping corner device of the pipe bending machine. Considering the spatial arrangement of the overall structure and the ease of operation, this solution designs the upward and downward sliding device as follows: The structure of the upward and downward sliding device includes: a third linear guide rail, the corner seat is set on the mold entry fixed seat through the third linear guide rail, the cylinder body of the mold entry cylinder is fixedly installed on the mold entry fixed seat, and the piston rod end of the mold entry cylinder is fixedly connected to the corner seat; when the piston rod of the mold entry cylinder extends outward or retracts inward, it drives the corner seat to move up and down along the third linear guide rail.

[0013] The beneficial effects of this utility model are: the above-mentioned device is set near the bending wheel module on the pipe bending machine to assist the bending wheel module in bending the pipe. It has a simple and compact structure, occupies little space, and can accurately ensure the rotation angle of the pipe, which greatly improves the product qualification rate. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the multi-directional bent pipe material described in the background art.

[0015] Figure 2 This is a schematic diagram of the automatic clamping angle device for a pipe bending machine as described in this utility model.

[0016] Figure 3 yes Figure 2 A partially enlarged structural diagram.

[0017] Figure 4 yes Figure 3 A schematic diagram of the clamping arm in the middle clamping mold assembly when it is raised.

[0018] Figure 5 yes Figure 3 A partial structural diagram of the rotating device. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0020] For ease of description, here we will use Figure 2 The left-hand direction shown is defined as "left". Figure 2 The right-hand direction shown is defined as "right". Figure 2 The area above is defined as "above". Figure 2 The term "below" is defined as "below" and all directional terms involved in this utility model shall be based on this definition.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The automatic clamping and rotating device for a pipe bending machine described in this utility model is installed near the pipe bending wheel module and is used to clamp and fix the pipe and adjust the rotation angle of the pipe during bending. Figure 2 As shown, the device includes: a fixed plate 2, and a mold insertion fixing seat 3 mounted on the fixed plate 2 via a left-right sliding device, wherein the mold insertion fixing seat 3 can move left and right relative to the fixed plate 2 via the left-right sliding device. There are various forms of left-right sliding devices available on the market. In principle, any left-right sliding device that enables the mold insertion fixing seat 3 to move left and right relative to the fixed plate 2 can be used on the automatic clamping corner device of this pipe bending machine. In this embodiment, considering the spatial arrangement of the overall structure and the simplicity of operation, the left-right sliding device is designed as follows:

[0024] like Figure 2 As shown, the structure of the left and right sliding device in this embodiment includes: a second linear guide rail; the mold insert fixing seat 3 is mounted on the fixing plate 2 via the second linear guide rail; a movable mold cylinder seat 31 is fixedly installed on the fixing plate 2; the cylinder body 32 of the movable mold cylinder is fixedly installed on the movable mold cylinder seat 31; and the end of the piston rod 33 of the movable mold cylinder is fixedly connected to the mold insert fixing seat 3. During operation, when the piston rod 33 of the movable mold cylinder extends outward, it pushes the mold insert fixing seat 3 to the right along the second linear guide rail; when the piston rod 33 of the movable mold cylinder retracts inward, it pulls the mold insert fixing seat 3 to the left along the second linear guide rail.

[0025] like Figure 2As shown, the corner seat 4 is mounted on the mold base 3 via an upward and downward sliding device, and the corner seat 4 can move up and down relative to the mold base 3 via the upward and downward sliding device. There are various forms of upward and downward sliding devices available on the market. In principle, any upward and downward sliding device that can enable the corner seat 4 to move up and down relative to the mold base 3 can be used on the automatic clamping corner device of this pipe bending machine. In this embodiment, considering the spatial arrangement of the overall structure and the simplicity of operation, the upward and downward sliding device is designed as follows:

[0026] like Figure 2 As shown, the structure of the upward and downward sliding device in this embodiment includes: a third linear guide rail; the corner seat 4 is mounted on the mold entry fixing seat 3 via the third linear guide rail; the cylinder body 41 of the mold entry cylinder is fixedly installed on the mold entry fixing seat 3; and the end of the piston rod 42 of the mold entry cylinder is fixedly connected to the corner seat 4. During operation, when the piston rod 42 of the mold entry cylinder extends outward, it pushes the corner seat 4 upward along the third linear guide rail; when the piston rod 42 of the mold entry cylinder retracts inward, it pulls the corner seat 4 downward along the third linear guide rail.

[0027] like Figure 2 As shown, the rotating mold 5 is mounted on the corner seat 4 via a rotating device, and the rotating mold 5 can rotate relative to its center line via the rotating device. A slot 51 is provided inward on the circumference of the rotating mold 5, and the position of the slot 51 ensures that the center line of the pipe 9 overlaps with the center line of the rotating mold 5 when the pipe 9 is placed at the bottom of the slot 51.

[0028] To guide the pipe 9 more smoothly into the slot 51, such as Figure 3 As shown, this embodiment has a trumpet-shaped guide groove 501 at the upper end of the slot 51. In addition, in order to better place the tube 9 at the bottom of the slot 51, the bottom of the slot 51 is set as an arc-shaped bottom surface that corresponds to and matches the outer contour of the tube 9.

[0029] The structure of the rotating device described in this embodiment is as follows: the rotating mold 5 is movably mounted on the corner seat 4 via a rotating support structure. The rotating support structure can be a locking block and slot structure, such as an annular slot structure on the corner seat 4 and an annular locking block structure on the rotating mold 5 that can be movably locked in the slot. Other structures are also acceptable, as long as they allow the rotating mold 5 to rotate freely around its own centerline. Figure 2 and Figure 5As shown, a mold-rotating gear 6 is fixedly installed on the mold 5. A clearance groove is provided on the mold-rotating gear 6, located at a position corresponding to the slot 51, thus preventing interference with the insertion of the pipe 9 into the slot 51. A servo motor 63 is fixedly installed on the corner seat 4. The motor shaft of the servo motor 63 is fixedly connected to a ball screw 62. A mold-rotating rack 61 is screwed into the ball screw 62. The mold-rotating rack 61 is mounted on the corner seat 4 via a first linear guide rail, and meshes with the mold-rotating gear 6. In this design, the ball screw is installed by a bearing seat with a bearing assembly on the fixed base, and the ball screw is supported by the bearing assembly.

[0030] When the rotation angle of pipe 9 needs to be adjusted, assuming that when the servo motor 63 rotates forward, it can drive the rotating mold rack 61 to move upward along the first linear guide rail via the ball screw 62. At this time, the upward-moving rotating mold rack 61 pushes the rotating mold gear 6 meshing with it to rotate clockwise. Conversely, when the servo motor 63 rotates in reverse, it can drive the rotating mold rack 61 to move downward along the first linear guide rail via the ball screw 62. At this time, the downward-moving rotating mold rack 61 pushes the rotating mold gear 6 meshing with it to rotate counterclockwise.

[0031] A pipe clamping mold assembly is provided on the corner seat 4 to clamp the pipe 9 against the bottom of the slot 51. For example... Figure 2 , Figure 3 and Figure 4 As shown, the structure of the pipe clamping mold assembly in this embodiment is as follows: the cylinder body 72 of the pipe clamping cylinder is hinged to the corner seat 4, and the pipe clamping arm 7 is hinged to the corner seat 4. One end of the pipe clamping arm 7 is hinged to the end of the piston rod 73 of the pipe clamping cylinder, and the other end of the pipe clamping arm 7 is a clamping end with a pipe clamping groove 71. The pipe clamping groove 71 is an arc-shaped groove that corresponds to and matches the outer contour of the pipe 9. During operation, when the piston rod 73 of the pipe clamping cylinder extends outward, it drives the pipe clamping arm 7 to rotate clockwise around the hinge point a between the pipe clamping arm 7 and the corner seat 4, thereby clamping the pipe 9 to the bottom of the slot 51. At this time, the pipe 9 is clamped by the bottom arc of the slot 51 and the pipe clamping groove 71. When the piston rod 73 of the clamping cylinder retracts inward, it drives the clamping arm 7 to rotate counterclockwise around the hinge point a between the clamping arm 7 and the corner seat 4, causing the clamping arm 7 to lift up, thereby releasing the pipe 9 located at the bottom of the slot 51.

[0032] During operation, the spatial position of the corner seat 4 is adjusted by the cooperation of the left-right sliding device and the up-down sliding device, thus accurately determining the vertical and horizontal position of the rotating mold 5. Then, the pipe 9 is securely clamped between the bottom of the clamping groove 71 and the slot 51 by the pipe clamping mold assembly. Finally, the rotation angle of the rotating mold 5 is controlled by the cooperation of the rotating mold gear 6 and the rotating mold rack 61, thereby precisely controlling the rotation angle of the pipe 9 and greatly improving the product qualification rate.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, a top-loading assembly is provided on the corner seat 4. The structure of the top-loading assembly is as follows: the cylinder body 8 of the top-loading cylinder is fixedly installed on the corner seat 4, and the piston rod 81 of the top-loading cylinder points to the pipe 9 located at the bottom of the slot 51. After the pipe bending is completed, the pipe 9 can be pushed out of the slot 51 by the top-loading cylinder to achieve the purpose of unloading.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. An automatic clamping corner device for use on a pipe bender, comprising: A fixing plate, characterized in that: an infeed fixing seat is mounted on the fixing plate via a left-right sliding device, and the infeed fixing seat can move left and right relative to the fixing plate via the left-right sliding device; a corner seat is mounted on the infeed fixing seat via an up-down sliding device, and the corner seat can move up and down relative to the infeed fixing seat via the up-down sliding device; a rotating mold is mounted on the corner seat via a rotating device, and the rotating mold can rotate relative to the center line of the rotating mold via the rotating device; a slot is provided inwardly on the circumference of the rotating mold, the position of the slot ensuring that the center line of the pipe overlaps with the center line of the rotating mold when the pipe is placed at the bottom of the slot; a pipe clamping mold assembly is provided on the corner seat to clamp the pipe against the bottom of the slot.

2. An automatic clamping corner device for a tube bending machine according to claim 1, characterized in that: A flared guide groove is provided at the upper end of the slot, and the bottom of the slot is an arc-shaped bottom surface that corresponds to and matches the outer contour of the pipe.

3. Automatic clamping corner device for tube bending machines according to claim 1 or 2, characterized in that: The structure of the pipe clamping mold assembly is as follows: the cylinder body of the pipe clamping cylinder is hinged to the corner seat, the pipe clamping arm is hinged to the corner seat, one end of the pipe clamping arm is hinged to the piston rod end of the pipe clamping cylinder, and the other end of the pipe clamping arm is a clamping end with a clamping groove, the clamping groove being an arc-shaped groove corresponding to and matching the outer contour of the pipe; when the piston rod of the pipe clamping cylinder extends outward or retracts inward, it drives the pipe clamping arm to rotate around the hinge point between the pipe clamping arm and the corner seat, thereby clamping the pipe in the bottom of the groove or releasing the pipe located in the bottom of the groove.

4. An automatic clamping corner device for tube bending machines according to claim 1 or 2, characterized in that: A top-feeding assembly is provided on the corner seat. The structure of the top-feeding assembly is as follows: the cylinder body of the top-feeding cylinder is fixedly installed on the corner seat, and the piston rod of the top-feeding cylinder points to the pipe located at the bottom of the slot.

5. The automatic clamp corner device for tube bending machines according to claim 1, characterized in that: The rotating device has the following structure: the rotating mold is movably mounted on the corner seat via a rotating support structure; a rotating mold gear is fixedly installed on the rotating mold; a clearance groove is provided on the rotating mold gear, and the clearance groove is located at a position corresponding to the slot; a servo motor is fixedly installed on the corner seat; the motor shaft of the servo motor is fixedly connected to a ball screw; a rotating mold rack is screwed into the ball screw; the rotating mold rack is mounted on the corner seat via a first linear guide rail, and the rotating mold rack meshes with the rotating mold gear; when the servo motor rotates forward or reverse, it drives the rotating mold rack to move upward or downward, thereby pushing the rotating mold gear to rotate forward or reverse.

6. An automatic clamp corner device for a tube bending machine according to claim 5, characterized in that: The corner seat is equipped with a bearing housing with a bearing assembly, and the ball screw is supported by the bearing assembly.

7. The automatic clamp corner device for tube bending machines according to claim 1, characterized in that: The structure of the left and right sliding device includes: a second linear guide rail, the mold insertion fixing seat is set on the fixing plate through the second linear guide rail, a movable mold cylinder seat is fixedly installed on the fixing plate, the cylinder body of the movable mold cylinder is fixedly installed on the movable mold cylinder seat, and the piston rod end of the movable mold cylinder is fixedly connected to the mold insertion fixing seat; when the piston of the movable mold cylinder retracts inward or extends outward, it drives the mold insertion fixing seat to move left and right along the second linear guide rail.

8. The automatic clamping corner device for tube bending machines according to claim 1 or 7, characterized in that: The structure of the upward and downward sliding device includes: a third linear guide rail, the corner seat being mounted on the mold entry fixed seat via the third linear guide rail, the cylinder body of the mold entry cylinder being fixedly installed on the mold entry fixed seat, and the end of the piston rod of the mold entry cylinder being fixedly connected to the corner seat; when the piston rod of the mold entry cylinder extends outward or retracts inward, it drives the corner seat to move up and down along the third linear guide rail.

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