阅读说明：本技术 一种气动小u弯管机 (Pneumatic small U pipe bender ) 是由 龙晓斌 龙晓明 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种气动小U弯管机,包括机架,在机架上设有折弯夹紧机构、摆臂、摆臂动力机构、切割机构和进芯机构,摆臂通过摆轴与机架铰接,且由摆臂动力机构驱动摆臂以摆轴为轴心向靠近或者远离折弯夹紧机构的方向摆动,进芯机构固定在摆臂的下方,并与折弯夹紧机构相匹配以共同夹持待折弯工件,进芯机构包括安装底板,在安装底板上设有进芯滑板,进芯滑板可在安装底板上沿X轴往复移动,在进芯滑板上的一端设有芯轴组件,另一端设有凸轮和轨迹槽,凸轮通过滚轮与进芯滑板连接,滚轮的一端固定在进芯滑板上,另一端穿入轨迹槽内。因此,本发明具有增力效果,抽芯作用力更大的、成本更低的并且更加环保的优点。(The invention discloses a pneumatic small U-shaped pipe bending machine which comprises a rack, wherein a bending clamping mechanism, a swing arm power mechanism, a cutting mechanism and a core feeding mechanism are arranged on the rack, the swing arm is hinged with the rack through a swing shaft, the swing arm power mechanism drives the swing arm to swing towards a direction close to or far away from the bending clamping mechanism by taking the swing shaft as an axis, the core feeding mechanism is fixed below the swing arm and matched with the bending clamping mechanism to clamp a workpiece to be bent together, the core feeding mechanism comprises a mounting base plate, a core feeding sliding plate is arranged on the mounting base plate, the core feeding sliding plate can reciprocate on the mounting base plate along an X axis, a mandrel assembly is arranged at one end of the core feeding sliding plate, a cam and a track groove are arranged at the other end of the core feeding sliding plate, the cam is connected with the core feeding sliding plate through a roller, one. Therefore, the invention has the advantages of reinforcement effect, larger core-pulling acting force, lower cost and more environmental protection.)

1. A pneumatic small U-shaped pipe bender comprises a rack (1), wherein a bending clamping mechanism (2), a swing arm (31), a swing arm power mechanism (32) and a cutting mechanism (5) are arranged on the rack (1), the bending clamping mechanism (2) is used for clamping a workpiece to be bent, the swing arm (31) is hinged with the rack (1) through a swing shaft (30), the swing arm power mechanism (32) drives the swing arm (31) to swing towards a direction close to or far away from the bending clamping mechanism (2) by taking the swing shaft (30) as an axis, the cutting mechanism (5) is arranged on one side of the bending clamping mechanism (2), the pneumatic small U-shaped pipe bender is characterized by further comprising a core feeding mechanism (4), the core feeding mechanism (4) is fixed below the swing arm (31) and matched with the bending clamping mechanism (2) to clamp the workpiece to be bent together, and the core feeding mechanism (4) comprises a mounting base plate (41), a core feeding sliding plate (42) is arranged on the mounting base plate (41), the core feeding sliding plate (42) can reciprocate on the mounting base plate (41) along an X axis, a mandrel component (43) is arranged at one end of the core feeding sliding plate (42), a cam (452) is arranged at the other end of the core feeding sliding plate (42), a track groove (451) is arranged on the cam (452), the cam (452) is connected with the core feeding sliding plate (42) through a roller (420), one end of the roller (420) is fixed on the core feeding sliding plate (42), and the other end of the roller (420) penetrates into the track groove (451) and can slide in the track groove (451); the cam (452) is driven by a power source (46) and can reciprocate on the core feeding sliding plate (42) along the Y axis, and when the power source (46) drives the cam (52) to reciprocate on the core feeding sliding plate (42) along the Y axis, the core feeding sliding plate (42) reciprocates along the X axis.

2. The pneumatic small U tube bender according to claim 1, wherein said mandrel assembly (43) comprises a mandrel (431), a mandrel holder (432), and a cam (433), wherein one end of said mandrel (431) is fixed on said mandrel holder (432), and the other end extends into said cam (433).

3. The pneumatic small U pipe bender according to claim 1 or 2, characterized in that said bending clamping mechanism (2) comprises a first mounting plate (21), a second power source (22) fixed on said first mounting plate (21), a spacing plate (23), a lower die holder (24), a clamping sliding key (25), a lower clamping block (26) and an upper clamping die (27) are arranged on the front side of said first mounting plate (21), said lower clamping block (26) is arranged on the upper surface of said lower die holder (24), and matched with the upper clamping die (27), the lower die holder (24) is positioned on the upper surface of the partition plate (23), the clamping sliding keys (25) are positioned at two sides of the lower die holder (24) and the spacing plate (23), and the clamping sliding key (25) and the lower die holder (24) are limited inside, and a bending die (28) for bending is arranged on the rear side of the first mounting plate (21).

4. The pneumatic small U-shaped pipe bender according to claim 1 or 2, characterized in that a straightening mechanism (6) and a feeding clamping mechanism (7) are arranged on the machine frame (1) in sequence along the advancing direction of a workpiece to be bent.

5. The pneumatic small-U pipe bender according to claim 4, further comprising an ejection mechanism (81), wherein the ejection mechanism (81) is disposed in front of the bending clamping mechanism (2) and is used for ejecting the pushing workpiece from the bending clamping mechanism (2).

6. The pneumatic small U bender according to claim 1 or 2, further comprising a spray cleaning system (82) disposed on said frame (1).

7. The pneumatic small U-shaped pipe bender according to claim 6, characterized in that, it further comprises a spray cleaning system (82) arranged on said frame (1).

8. The pneumatic small U pipe bender according to claim 7, characterized in that the spray cleaning system (82) comprises a liquid tank (821), a hydraulic pump (822), a pipeline (823) and a plurality of spray headers (824), the pipeline (823) is communicated with the output end of the hydraulic pump (822), the spray headers (824) are arranged at the output end of the pipeline (823), and the hydraulic pump (822) sucks the liquid in the liquid tank (821) and conveys the liquid to the spray headers (824) through the pipeline (823) to be sprayed out by the spray headers (824).

9. The pneumatic small U-shaped pipe bender according to claim 8, characterized in that the spray cleaning system (82) comprises a liquid tank (821), a hydraulic pump (822), a pipeline (823) and a plurality of spray headers (824), the pipeline (823) is communicated with the output end of the hydraulic pump (822), the spray headers (824) are arranged at the output end of the pipeline (823), the hydraulic pump (822) sucks the liquid in the liquid tank (821) and conveys the liquid to the spray headers (824) through the pipeline (823) to be sprayed out by the spray headers (824).

Technical Field

The invention relates to the field of pipe bending machines, in particular to a pneumatic small U-shaped pipe bending machine.

Background

Chinese patent document CN 105935882A discloses a multifunctional composite small U-shaped pipe bender and an operation method thereof, wherein the pipe bender comprises a frame, an electric box, a feeding mechanism and a cutting mechanism which are sequentially arranged on the frame along the material advancing direction, a swing arm and a swing arm driving mechanism are further arranged on one side of the frame where the cutting mechanism is arranged, the feeding mechanism is connected with the frame through a sliding device and driven by the driving device to reciprocate along the material advancing direction on the frame, the cutting mechanism is fixedly connected with the frame, a bending die is fixed at one end of the frame where the cutting mechanism is arranged, a profiling mechanism corresponding to the bending die is arranged on the swing arm, the profiling mechanism is matched with the bending die, the profiling mechanism comprises a profiling die, a mandrel and a mandrel cylinder, the mandrel is arranged in the profiling die, the mandrel cylinder is connected with the profiling die and is used for driving the profiling to drive the mandrel to reciprocate along the material advancing direction on the swing arm, to allow the mandrel to enter and exit the interior of the material.

The multifunctional composite small U-shaped pipe bender in the prior art has the following defects in the use process, the profiling mechanism is driven by an oil cylinder, and the oil cylinder drives the profiling to drive the mandrel to reciprocate on the swing arm along the advancing direction of the material, so that the mandrel enters and exits the material. The mode of this kind of hydraulic system who uses the hydro-cylinder, not only the loss is big, and is with high costs, the resource-wasting and easy polluted environment is revealed to the greasy dirt of hydro-cylinder, for this reason, somebody thinks of with modes such as pneumatic cylinder or motor directly to act on profiling mechanism and loose core, but the effort of loosing core needs is bigger, just can reach and take out the dabber from the pipe fitting completely, consequently, directly adopt power supplies such as pneumatic cylinder or motor to loose core, will reach the effort of loosing core that is enough big, the volume of the pneumatic cylinder or the motor of adoption is just bigger, the space that bulky pneumatic cylinder or motor occupy is just bigger, and more inconvenient control.

Disclosure of Invention

The invention aims to provide a pneumatic small U-shaped pipe bender which can be used for boosting, has larger core-pulling acting force and lower cost and is more environment-friendly.

In order to achieve the purpose, the invention adopts the following technical scheme: the pneumatic small U-shaped pipe bending machine comprises a frame, wherein a bending clamping mechanism, a swing arm power mechanism and a cutting mechanism are arranged on the frame, the bending clamping mechanism is used for clamping a workpiece to be bent, the swing arm is hinged with the frame through a swing shaft, the swing arm power mechanism drives the swing arm to swing towards a direction close to or far away from the bending clamping mechanism by taking the swing shaft as an axis, the cutting mechanism is arranged on one side of the bending clamping mechanism, the pneumatic small U-shaped pipe bending machine also comprises a core feeding mechanism, the core feeding mechanism comprises an installation bottom plate, a core feeding sliding plate is arranged on the installation bottom plate, the core feeding sliding plate can reciprocate along an X axis on the installation bottom plate, a mandrel component is arranged at one end of the core feeding sliding plate, a cam is arranged at the other end of the core feeding sliding plate, a track groove is arranged on the cam, the cam is connected with the core feeding sliding plate, the other end of the roller penetrates into the track groove and can slide in the track groove; the cam is driven by a power source and can reciprocate on the core feeding sliding plate along the Y axis, and when the power source drives the cam to reciprocate on the core feeding sliding plate along the Y axis, the core feeding sliding plate reciprocates along the X axis.

As an improvement of the invention, the mandrel component comprises a mandrel, a mandrel bracket and a profiling, wherein one end of the mandrel is fixed on the mandrel bracket, and the other end of the mandrel extends into the profiling.

As an improvement of the invention, the bending clamping mechanism comprises a first mounting plate and a second power source fixed on the first mounting plate, a partition plate, a lower die holder, a clamping sliding key, a lower clamping block and an upper clamping die are arranged on the front side of the first mounting plate, the lower clamping block is positioned on the upper surface of the lower die holder and matched with the upper clamping die, the lower die holder is positioned on the upper surface of the partition plate, the clamping sliding key is positioned on two sides of the lower die holder and the partition plate and limits the clamping sliding key and the lower die holder, and a bending die for bending is arranged on the rear side of the first mounting plate.

As an improvement of the invention, a straightening mechanism and a feeding clamping mechanism which are sequentially arranged along the advancing direction of the workpiece to be bent are also arranged on the rack.

The bending clamping mechanism is arranged in front of the bending clamping mechanism and used for pushing the workpiece to be pushed to exit from the bending clamping mechanism.

As an improvement of the invention, the spraying cleaning system is arranged on the rack.

As an improvement of the invention, the spray cleaning system comprises a liquid tank, a hydraulic pump, a pipeline and a plurality of spray heads, wherein the pipeline is communicated with the output end of the hydraulic pump, the spray heads are arranged at the output end of the pipeline, and the hydraulic pump sucks the liquid in the liquid tank, conveys the liquid to the spray heads through the pipeline and sprays the liquid out of the spray heads.

The core feeding mechanism comprises a mounting base plate, a core feeding sliding plate is arranged on the mounting base plate and can move on the mounting base plate in a reciprocating mode along an X axis, a mandrel component is arranged at one end of the core feeding sliding plate, a cam is arranged at the other end of the core feeding sliding plate, a track groove is formed in the cam, the cam is connected with the core feeding sliding plate through a roller, one end of the roller is fixed on the core feeding sliding plate, and the other end of the roller penetrates into the track groove and can slide in the track groove; when the core feeding slide plate is used, when the power source drives the cam to reciprocate on the core feeding slide plate along the Y axis, the core feeding slide plate reciprocates along the X axis. The cam and the track groove are of a boosting structure, when the cam moves under the driving of a first power source, the roller slides in the track groove, the speed of the roller is lower than that of the cam at the moment, and the roller is fixed on the core inlet sliding plate, so that the core inlet sliding plate realizes core inlet or core pulling at the same speed as the roller, the speed is reduced under the condition that the power is unchanged, the acting force in the same direction of the speed is increased, and the acting force of the core inlet sliding plate on the core inlet or core pulling is increased, so that the structure can generate larger acting force for core inlet or core pulling under the same power; the first power source of the invention adopts the cylinder or the motor, which is cleaner and free of oil stain, and can achieve the effect of acting force of the cylinder directly as the power source after force increasing; therefore, the invention has the advantages of reinforcement effect, larger core-pulling acting force, lower cost and more environmental protection.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the core-feed mechanism of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is a top view of the present invention as it enters the core;

FIG. 6 is a top view of the present invention during core pulling;

FIG. 7 is a schematic view of FIG. 1 showing a bent state during cutting;

FIG. 8 is a schematic view of the crimping clamping mechanism of FIG. 1;

FIG. 9 is a sectional view taken along line A-A of FIG. 8;

FIG. 10 is a perspective view of FIG. 8;

FIG. 11 is a schematic structural view of the spray cleaning system of FIG. 1;

FIG. 12 is a schematic perspective view of the material returning mechanism of FIG. 1;

fig. 13 is a top view of fig. 12.

Detailed Description

The invention will be further described with reference to the accompanying drawings and the detailed description below:

as shown in fig. 1 to 13, fig. 1 to 13 disclose an embodiment of a pneumatic small U pipe bender, which includes a frame 1, wherein a bending clamping mechanism 2, a swing arm 31, a swing arm power mechanism 32 and a cutting mechanism 5 are disposed on the frame 1, the bending clamping mechanism 2 is used for clamping a workpiece to be bent, the swing arm 31 is hinged to the frame 1 through a swing shaft 30, the swing arm power mechanism 32 drives the swing arm 31 to swing in a direction approaching to or away from the bending clamping mechanism 2 with the swing shaft 30 as an axis, the cutting mechanism 5 is disposed on one side of the bending clamping mechanism 2, in the present invention, the pneumatic small U pipe bender further includes a core feeding mechanism 4, the core feeding mechanism 4 is fixed below the swing arm 31 and matched with the bending clamping mechanism 2 to clamp the workpiece to be bent, the core feeding mechanism 4 includes a mounting base plate 41, a core feeding sliding plate 42 is disposed on the mounting base plate 41, the core-feeding sliding plate 42 can reciprocate on the mounting base plate 41 along the X-axis, and in the present invention, preferably, the reciprocating movement of the core-feeding sliding plate 42 on the mounting base plate 41 along the X-axis is realized by a guide rail slider structure or a linear bearing structure. In this embodiment, specifically, the core-feeding sliding plate 42 is provided with a first guide rail 421 (or a first slider) at the bottom, and the mounting base plate 41 is provided with a first slider 422 (or a first guide rail) corresponding to the first guide rail 421 (or the first slider). Of course, besides, the reciprocating movement of the core-feeding sliding plate 42 on the mounting base plate 41 along the X-axis can also be realized by a dovetail groove guide rail structure or a T-shaped guide rail structure, which is not described in detail herein. In the invention, a mandrel assembly 43 is arranged at one end of the core feeding sliding plate 42, a cam 452 is arranged at the other end of the core feeding sliding plate 42, a track groove 451 is arranged on the cam 452, the cam 452 is connected with the core feeding sliding plate 42 through a roller 420, one end of the roller 420 is fixed on the core feeding sliding plate 42, and the other end of the roller 420 penetrates into the track groove 451 and can slide in the track groove 451; the cam 452 is driven by a first power source 46 and can reciprocate on the core-feeding sliding plate 42 along the Y-axis, in this embodiment, a through slot is provided in the swing arm 31, and the first power source 46 drives the cam 452 to slide in and out of the through slot of the swing arm 31. In the present invention, the cam 452 reciprocates along the Y-axis by a guide slider structure or a linear bearing structure. In this embodiment, specifically, the structure is implemented by a rail-slider structure, a second rail 4521 (or a second slider) is disposed on one side of the cam 452, and a second slider 4522 (or a second rail) corresponding to the position of the second rail 4521 (or the second slider) is disposed on the mounting base plate 41. When the core feeding slide plate 42 is used, when the cam 452 is driven by the first power source 46 to reciprocate on the core feeding slide plate 42 along the Y axis, at the same time, the core feeding slide plate 42 reciprocates along the X axis, so that the core shaft assembly 43 on the core feeding slide plate 42 realizes core feeding or core pulling. In the present invention, the first power source 46 is a cylinder, but may also be a motor, etc., and is not limited herein. The cam 452 and the track groove 451 are adopted in the invention, the cam 452 and the track groove 451 are a boosting structure, by adopting the boosting structure, when the cam 452 moves under the driving of the first power source 46, the roller 420 slides in the track groove 451, at this time, the speed of the roller 420 is smaller than that of the cam 452, and because the roller 420 is fixed on the core-entering sliding plate 42, the core-entering sliding plate 42 realizes core entering or core pulling at the same speed as the roller 420, according to the formula P, the speed is reduced under the condition that the mechanism power is not changed, the acting force in the same direction as the speed is increased, therefore, the acting force of the core-entering sliding plate 42 driving the mandrel assembly 43 to enter or core pulling is increased, and therefore, under the same power, the structure of the invention can generate larger acting force for core entering or core pulling; the first power source 46 of the present invention is a cylinder or a motor, which is cleaner and free of oil contamination, and can achieve the effect of acting force of the cylinder directly as the power source after force increasing.

In the present invention, preferably, the mandrel assembly 43 includes a mandrel 431, a mandrel support 432, and a cam 433, one end of the mandrel 431 is fixed on the mandrel support 432, and the other end extends into the cam 433; in the invention, specifically, the mandrel 431 is fixed at the center of the explorator 433, a containing space for a workpiece to penetrate is also left between the mandrel 431 and the inner wall of the explorator 433, the mandrel 431 is used for supporting the inner wall of the workpiece, and when in use, the workpiece penetrates into the mandrel 431, so that the inner wall of the workpiece is prevented from being deformed during bending. In this embodiment, the workpiece is a copper pipe, specifically, in the bending process of the copper pipe, the explorator 433 and a bending die (not shown in the figure) together form a profiling of the copper pipe, the copper pipe is inserted into the profiling, and the explorator 433 rotates around the bending center to apply an acting force to the copper pipe, so that the copper pipe is bent into a U shape.

In the present invention, preferably, the bending clamping mechanism 2 includes a first mounting plate 21, and a second power source 22 (as shown in fig. 8 to 10) fixed to the first mounting plate 21, a partition 23, a lower die holder 24, a clamping sliding key 25, a lower clamping block 26 and an upper clamping die 27 are provided on a front side of the first mounting plate 21, the lower clamping block 26 is provided on an upper surface of the lower die holder 24 and matches with the upper clamping die 27, the lower die holder 24 is provided on an upper surface of the partition 23, the clamping sliding key 25 is provided on two sides of the lower die holder 24 and the partition 23 and limits the clamping sliding key 25 and the lower die holder 24, a bending die 28 for bending is provided on a rear side of the first mounting plate 21, a workpiece to be bent is bent upward from the bending die 28 and penetrates into the mandrel 431, when the swing arm 31 swings, the core feeding mechanism 4 is driven to be bent to approach the bending clamping mechanism 2, so that the workpiece to be bent is bent, and the bent workpiece is cut by the cutting mechanism 5.

In the invention, preferably, a straightening mechanism 6 and a feeding clamping mechanism 7 which are sequentially arranged along the advancing direction of the workpiece to be bent are also arranged on the rack 1, the straightening mechanism 6 is used for straightening the workpiece to be bent so as to facilitate the workpiece to smoothly enter the bending clamping mechanism 2, and the feeding clamping mechanism 7 feeds materials, so that full-automatic bending is realized; in the present invention, the straightening mechanism 6 and the feeding and clamping mechanism 7 are implemented by the prior art, and are not described in detail herein.

In the present invention, it is preferable that the bending apparatus further includes a material returning mechanism 81 (as shown in fig. 12 to 13), and the material returning mechanism 81 is provided in front of the bending clamping mechanism 2 and is configured to return the pushed workpiece from the bending clamping mechanism 2. When the material returning mechanism 81 is used, when a workpiece needs to be withdrawn from the bending clamping mechanism 2, the material returning power source 811 is started, the guide rod 813 can move forwards along with the linear bearing 812, so that the material returning power source 811 pushes the material returning rod clamping seat 815 and the material returning rod 816 on the material returning rod clamping seat 815 to move forwards, the material returning rod 816 pushes the workpiece, so that the workpiece is withdrawn from the bending clamping mechanism 2, and when the material returning is not needed, the material returning power source 811 retracts the rod, and the guide rod 813 moves reversely and resets accordingly, so that the material returning power source 811 pushes the material returning rod clamping seat 815 and the material returning rod 816 thereon to reset. The material returning mechanism 81 disclosed by the invention is simple in structure and convenient to operate, and can realize automatic material returning.

In the present invention, preferably, the system further includes a spray cleaning system 82 (as shown in fig. 11) disposed on the rack 1, the spray cleaning system 82 includes a liquid tank 821, a hydraulic pump 822, a pipeline 823 and a plurality of spray heads 824, the pipeline 823 is communicated with an output end of the hydraulic pump 822, the spray heads 824 are disposed at an output end of the pipeline 823, the hydraulic pump 822 sucks the liquid in the liquid tank 821 and conveys the liquid to the spray heads 824 through the pipeline 823 to be sprayed out by the spray heads 824; in this embodiment, the rack 1 is configured to be closed, the cleaning liquid of the spray cleaning system 82 during cleaning does not splash to the outside of the rack 1, the number of the spray headers 824 can be set as required, and the main purpose of spraying is: 1. the core shaft 431 is lubricated, so that core feeding and core pulling are facilitated; 2. the cutters of the cutting mechanism 5 are lubricated and cooled, so that the cooling of the cutters is facilitated, and the service lives of the cutters are prolonged; 3. when the device is used for cutting, a lot of fine copper scraps and powder can be generated and fly in the machine frame 1, so that the sprayed liquid can clean the powder in the machine frame 1. In this embodiment, specifically, a copper scrap filter box 825 is further disposed above the liquid tank 821 in the rack 1, the sprayed liquid flows into the copper scrap filter box 825 in a concentrated manner, the copper scrap filter box 825 can filter the cleaned liquid, the copper scrap with larger particles is left in the copper scrap filter box 825, and the liquid enters the liquid tank 821 again, so that the copper scrap filter box is used repeatedly.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.