CN215199022U

CN215199022U - Thin-wall tail pipe bending forming device

Info

Publication number: CN215199022U
Application number: CN202120826244.0U
Authority: CN
Inventors: 曾建平
Original assignee: Chongqing Jinfeng Machinery Co ltd
Current assignee: Chongqing Jinfeng Machinery Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-17
Anticipated expiration: 2031-04-21

Abstract

The utility model provides a thin-wall tail pipe bending forming device, which relates to the technical field of a bent pipe forming device and comprises a shearing device, a bending device and a bending device, wherein the shearing device is used for shearing a plastic plate into a blank in a thin-wall bent pipe unfolding state; the arc-shaped forming device is used for pressing the blank sheared by the shearing device into an arc-shaped middle part and comprises an upper die and a lower die arranged right below the upper die, wherein the upper die is formed with a bulge towards the direction of the lower die, and the lower die is provided with a notch matched with the bulge; the thin-wall bent pipe forming device is used for pressing the middle part into an arc-shaped thin-wall bent pipe; and the press is used for installing the shearing device, the arc forming device and the thin-wall bent pipe forming device and providing driving force for the shearing device, the arc forming device and the thin-wall bent pipe forming device. The device has the advantages of improving the surface quality and the processing precision of the thin-wall bent pipe so as to improve the qualification rate of products.

Description

Thin-wall tail pipe bending forming device

Technical Field

The utility model relates to a return bend forming device's technical field especially relates to a thin wall tail pipe bending device.

Background

Referring to fig. 5, the thin-wall elbow is a reducing thin-wall elbow, two ends of the reducing thin-wall elbow are straight pipelines, the wall thickness of the thin-wall elbow is thinner, and a large end of the thin-wall elbow is provided with an obliquely-arranged notch. According to the prior relevant technology, the process steps of processing the thin-wall bent pipe are that the pipe is bent firstly, then the two ends of the pipe are cut, the inclined notch needs to be cut for many times to meet the use requirement, then the end provided with the notch is flared, and the end face is deburred.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the utility model provides a thin wall tail pipe bending device, its advantage that has the surface quality and the machining precision of improving the thin wall return bend in order to improve the qualification rate of product.

According to the embodiment of the utility model, the bending and forming device of the thin-wall tail pipe comprises a shearing device which is used for shearing a plastic plate into a blank of a thin-wall bent pipe in an expansion state; the arc-shaped forming device is used for pressing the blank sheared by the shearing device into an arc-shaped middle part and comprises an upper die and a lower die arranged right below the upper die, wherein the upper die is formed with a bulge towards the direction of the lower die, and the lower die is provided with a notch matched with the bulge; the thin-wall bent pipe forming device is used for pressing the middle part into an arc-shaped thin-wall bent pipe; and the press is used for installing the shearing device, the arc forming device and the thin-wall bent pipe forming device and providing driving force for the shearing device, the arc forming device and the thin-wall bent pipe forming device.

Preferably, the thin-wall bent pipe forming device comprises an upper female die and a lower female die arranged right below the upper female die, wherein the upper female die and the lower female die are respectively provided with a forming groove, the two forming grooves are arranged oppositely, and the profile formed by the two forming grooves is the same as the external profile of the thin-wall bent pipe.

Preferably, transition surfaces are arranged on two sides of the forming groove of the upper female die, the two transition surfaces form a transition port, and the width of the transition port is larger than that of the forming groove.

Preferably, a mandrel for shaping the intermediate part during pressing into the thin-walled elbow is detachably mounted in the forming groove.

Preferably, the mandrels include a first mandrel and a second mandrel, and the first mandrel and the second mandrel form a component which is the same as the inner contour of the thin-walled elbow.

Preferably, the first mandrel or the second mandrel is a cylindrical component, and a positioning piece for positioning the end part of the thin-wall bent pipe is detachably mounted on the middle part of the cylindrical component.

Preferably, at least one of the first mandrel and the second mandrel is connected with a driving assembly for facilitating sliding out of the driving assembly along the end direction of the thin-wall bent pipe.

Preferably, the drive assembly comprises a linear telescopic member for mounting a mounting of the linear telescopic member, the linear telescopic member being adapted to drive the first spindle and/or the second spindle in a linear sliding movement.

Preferably, the lower female die is further provided with a guide assembly for guiding the first mandrel and/or the second mandrel, the guide assembly comprises a fixed plate, a plurality of guide columns and a moving plate, the fixed plate is arranged on the lower female die and fixed on one side of the forming groove, and the fixed plate is provided with a through hole for penetrating the first mandrel or the second mandrel; the guide post is a strip-shaped rod-shaped component; the guide post is fixed on the fixed plate and slidably penetrates through the movable plate, the first core shaft or the second core shaft penetrates through the through hole, the end part of the first core shaft or the second core shaft is fixed on the movable plate, and the telescopic end of the linear telescopic piece is connected to the movable plate.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. cutting the plate by using a shearing device, punching the plate by using an arc-shaped forming device and a thin-wall bent pipe forming device to manufacture a thin-wall bent pipe-shaped component, and welding punched parts to finish the manufacture of the thin-wall bent pipe; compared with the traditional manufacturing mode, secondary processing such as cutting and the like on the pipeline is not needed, burrs, flashes and the like are not generated, and the surface quality of the processed part is higher; during the manufacturing of the thin-wall bent pipe, the precision of the thin-wall bent pipe can be controlled by shearing the plate, so that the precision of the thin-wall bent pipe produced in each batch is the same;

2. when the thin-wall bent pipe is manufactured, the core shaft is utilized to enable the plate to be more convenient to form when the thin-wall bent pipe is formed, the core shaft is arranged in the thin-wall bent pipe, and the plate is curled and formed according to the designed direction in the process of manufacturing the thin-wall bent pipe by utilizing the combined action of the forming opening and the core shaft, so that the possibility of generating defective products is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of an arc forming device according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an overall structure of a thin-walled elbow forming device according to an embodiment of the present application;

FIG. 3 is a schematic partial cross-sectional view of a thin-walled elbow forming apparatus;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of a prior art thin-walled elbow.

In the above drawings: 1. an arc forming device; 11. an upper die; 111. a protrusion; 12. a lower die; 121. a recess; 2. a pipe bending forming device; 21. a female die is arranged; 22. a lower concave die; 23. forming a groove; 231. a transition surface; 3. a mandrel; 31. a first mandrel; 32. a second mandrel; 33. a positioning member; 4. a drive assembly; 41. a linear expansion member; 42. a mounting member; 5. a guide assembly; 51. a fixing plate; 511. perforating; 52. a guide post; 53. and (5) moving the plate.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, the embodiment of the utility model provides a thin wall tail pipe bending device is proposed, including the shearing mechanism that is used for shearing into the blank of return bend expansion state to plastic panel, be used for becoming curved middle part's arcuation forming device 1 and be used for becoming curved tubulose return bend forming device 2 with curved middle part punching press with platelike blank to and be used for installing shearing mechanism, arcuation forming device 1 and return bend forming device 2 and provide the press of drive power for the three. Compared with the traditional processing mode, the device has the advantages that secondary cutting is not needed when the device is used for manufacturing the bent pipe, burrs and the like are reduced, the surface quality of the workpiece is improved, meanwhile, the size and the shape of the workpiece can be controlled by the cutting device, so that the formed size of each batch of workpieces is the same, the processing precision of the workpiece is improved, secondary processing is reduced, namely, the size error caused by secondary production processing is reduced, and the qualified rate of workpiece production is improved.

The shearing device is the prior art, can be made by customization according to the unfolded shape of the bent pipe, and the shape of the unfolded bent pipe is the best along the shortest side edge of the bent pipe during shearing in order to reduce the welding line after the bent pipe is formed.

Referring to fig. 1, an arc forming device 1 includes an upper die 11 and a lower die 12, which are arranged opposite to each other, the upper die 11 is used for being mounted on a telescopic end of a press, the lower die 12 is used for being arranged on a workbench of the press, and the positions of the upper die 11 and the lower die 12 can be interchanged according to field requirements; a protrusion 111 is formed on the upper die 11 towards the lower die 12, a notch 121 adapted to the protrusion 111 is formed on the side of the lower die 12 opposite to the upper die 11, and the width of the gap between the two is the same as the thickness of the bent pipe; when the device is used, the cut blank is placed at the notch 121 of the lower die 12, the press is started to move the upper die 11 towards the lower die 12, and the plate-shaped blank is pressed into the arc-shaped intermediate part under the matching of the protrusion 111 and the notch 121.

The middle part of the bulge 111 forms an arc shape towards the lower die 12, and the bottom of the notch 121 is correspondingly matched with the middle part, so that the formed middle part and the bent pipe have the same shape after half-section along the axis of the bent pipe, and the bent pipe is more convenient to be formed by subsequent processing.

Referring to fig. 2 and 3, the elbow forming device 2 includes an upper female die 21 and a lower female die 22, which are disposed opposite to each other, the upper female die 21 and the lower female die 22 are respectively mounted on the telescopic end of the pressure and the workbench, and the positions of the upper female die 21 and the lower female die 22 can be interchanged according to requirements. Opposite sides of the upper female die 21 and the lower female die 22 are respectively provided with a forming groove 23 which is arranged oppositely, and the two forming grooves 23 are combined together to form the shape which is the same as the external contour of the bent pipe.

Transition surfaces 231 are respectively arranged on two sides of one of the forming grooves 23, the transition surfaces 231 are obliquely arranged, two transition surfaces 231 form a transition opening, the width of the transition opening is larger than that of the forming groove 23, and convex blocks matched with the transition surfaces 231 are arranged on two sides of the other forming groove 23. When the middle part is punched and bent, the transition surface 231 can be used for guiding and further processing two sides of the middle part; meanwhile, the transition port formed by the transition surface 231 and the bump arranged opposite to the transition port play a role in positioning when the upper female die 21 and the lower female die 22 of the elbow forming device 2 are matched, so that the bending of the intermediate part is more convenient, and the control of the width of a welding seam of the intermediate part when the intermediate part is manufactured into an elbow is facilitated.

Referring to fig. 3 and 4, the mandrel 3 is detachably mounted in the forming groove 23, the mandrel 3 includes a first mandrel 31 and a second mandrel 32, the first mandrel 31 and the second mandrel 32 are combined together to form a shape similar to the inner contour of the bent pipe, the first mandrel 31 is a cylindrical member, a positioning member 33 is fixed at the middle part of the cylindrical member, and the positioning member 33 is used for positioning the end position of the bent pipe.

When the device is used for stamping and manufacturing the bent pipe, the mandrel 3 is placed in the intermediate part, then stamping forming is carried out, in the stamping process, under the combined action of the mandrel 3 and the forming groove 23, the intermediate part can be bent according to the designed direction, the mandrel 3 can reduce the possibility that the surface of the bent pipe is concave during forming, and further the possibility of producing defective products is reduced.

After the pipe bending is performed, in order to conveniently take out the mandrel 3, a driving assembly 4 for driving the mandrel 3 to slide and separate is connected to the mandrel 3, the driving assembly 4 can be connected to the first mandrel 31 or the second mandrel 32, and the driving assembly 4 can also be connected to both of the first mandrel and the second mandrel.

The second mandrel 32 is connected with the driving assembly 4, the driving assembly 4 comprises a linear expansion piece 41 and a mounting piece 42 for mounting the linear expansion piece 41, the linear expansion piece 41 can adopt a commercially available air cylinder or oil cylinder, an electric cylinder and the like, the mounting piece 42 can be made of a steel plate, the mounting piece 42 is arranged on one side of the second mandrel 32, a connecting plate is fixed at the bottom of the lower female die 22 for fixing the mounting piece 42, and the mounting piece 42 is fixed on the connecting plate; a linear expansion member 41 is mounted on the mounting member 42 with its expansion end connected to the end of the second mandrel 32 and the distance between the second mandrel 32 and the forming groove 23 in the lower die 22 is the same as the thickness of the bent pipe.

A guide assembly 5 for guiding the second mandrel 32 is further arranged at the lower die 22, the guide assembly 5 comprises a fixed plate 51, a plurality of guide columns 52 and a moving plate 53, the fixed plate 51 is a flat-plate-shaped member fixed on the lower die 22 and is positioned at one side close to the second mandrel 32, a through hole 511 is formed in the middle of the fixed plate 51, and the second mandrel 32 is slidably inserted in the through hole 511; the guide column 52 is a long-strip-shaped member, and the guide column 52 is fixed on the fixing plate 51 and is arranged in a direction away from the second mandrel 32; the moving plate 53 is a flat plate-shaped member, the moving plate 53 is slidably disposed on the guide column 52, the second mandrel 32 is fixed on the moving plate 53, and the telescopic end of the linear telescopic element 41 is connected and fixed with the moving plate 53.

The mandrel 3 can be conveniently placed in the middle part before the bent pipe is manufactured by using the driving component 4, and the mandrel 3 can be conveniently taken out after the bent pipe is formed; the guide assembly 5 may facilitate positioning of the second mandrel 32.

The shearing device, the arc-shaped forming device 1 and the elbow forming device 2 of the device can be arranged on the same press machine or can be respectively arranged on different press machines.

The application discloses an implementation principle of thin wall tail pipe bending device: placing a plastic plate on a shearing device, shearing the plate into a blank in the unfolding state of a bent pipe, placing the cut blank on an arc-shaped forming device 1, stamping the blank into an arc-shaped middle part with a U-shaped cross section, placing the middle part in a forming groove 23 of a bent pipe forming device 2, placing a mandrel 3 on the middle part, moving an upper female die 21 towards a lower female die 22, stamping the middle part to form the bent pipe, and welding the seam of the stamped bent pipe to finish the manufacture of the bent pipe.

Compared with the traditional processing mode, the bent pipe manufactured by the device does not need to be cut for the second time, the surface quality of the product is improved, the size precision of the bent pipe can control the shearing size of the plate through the shearing device, so that the bent pipe produced in each batch does not have large size difference, and the qualified rate of the product is favorably improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a thin wall tail pipe bending device which characterized in that:

the device comprises a shearing device, a bending device and a control device, wherein the shearing device is used for shearing a plastic plate into a blank in a thin-wall bent pipe unfolding state;

the arc-shaped forming device (1) is used for pressing blanks sheared by the shearing device into arc-shaped intermediate parts, the arc-shaped forming device (1) comprises an upper die (11) and a lower die (12) arranged right below the upper die, a protrusion (111) is formed in the upper die (11) in the direction facing the lower die (12), and the lower die (12) is provided with a notch (121) matched with the protrusion (111);

the thin-wall bent pipe forming device (2) is used for pressing the middle part into an arc-shaped thin-wall bent pipe;

the press is used for installing the shearing device, the arc-shaped forming device (1) and the thin-wall bent pipe forming device (2) and providing driving force for the shearing device, the arc-shaped forming device and the thin-wall bent pipe forming device.

2. The thin-walled tailpipe bending apparatus according to claim 1, wherein: thin wall return bend forming device (2) are including last die (21) and set up lower die (22) under it last die (21) and be provided with shaping groove (23) respectively down on die (22), two shaping grooves (23) are just setting up, and the profile that two shaping grooves (23) formed is the same with the external profile of thin wall return bend.

3. The thin-walled tailpipe bending apparatus according to claim 2, wherein: transition surfaces (231) are arranged on two sides of the forming groove (23) of the upper female die (21), a transition port is formed by the two transition surfaces (231), and the width of the transition port is larger than that of the forming groove (23).

4. The thin-walled tailpipe bending apparatus according to claim 2 or 3, wherein: and a mandrel (3) for shaping the intermediate part when the intermediate part is pressed into a thin-wall bent pipe is detachably mounted in the forming groove (23).

5. The thin-walled tailpipe bending apparatus according to claim 4, wherein: the mandrel (3) comprises a first mandrel (31) and a second mandrel (32), and the first mandrel (31) and the second mandrel (32) form a component which is the same as the internal profile shape of the thin-wall bent pipe.

6. The thin-walled tailpipe bending apparatus according to claim 5, wherein: the first mandrel (31) or the second mandrel (32) is a cylindrical component, and a positioning piece (33) for positioning the end part of the thin-wall bent pipe is detachably mounted on the middle part of the cylindrical component.

7. The thin-walled tailpipe bending apparatus according to claim 5, wherein: at least one of the first mandrel (31) and the second mandrel (32) is connected with a driving assembly (4) for facilitating sliding out of the driving assembly along the end direction of the thin-wall bent pipe.

8. The thin-walled tailpipe bending apparatus according to claim 7, wherein: the driving assembly (4) comprises a linear telescopic piece (41) and a mounting piece (42) used for mounting the linear telescopic piece (41), and the linear telescopic piece (41) is used for driving the first mandrel (31) and/or the second mandrel (32) to perform linear sliding movement.

9. The thin-walled tailpipe bending apparatus according to claim 7, wherein: the lower concave die (22) is further provided with a guide assembly (5) for guiding the first mandrel (31) and/or the second mandrel (32), the guide assembly (5) comprises a fixing plate (51), a plurality of guide columns (52) and a moving plate (53) which are arranged on the lower concave die (22), the fixing plate (51) is fixed on one side of the forming groove (23), and a through hole (511) for penetrating the first mandrel (31) or the second mandrel (32) is formed in the fixing plate (51); the guide column (52) is a long bar-shaped component; the guide column (52) is fixed on the fixed plate (51) and slidably arranged on the moving plate (53), the first mandrel (31) or the second mandrel (32) is arranged in the through hole (511) in a penetrating mode, the end portion of the first mandrel (31) or the second mandrel (32) is fixed on the moving plate (53), and the telescopic end of the linear telescopic piece (41) is connected to the moving plate (53).