阅读说明：本技术 一种高精密冷拔无缝钢管弯管装置 (High-precision cold-drawing seamless steel tube bending device ) 是由 周飞 孙兆松 徐辉 于 2021-11-03 设计创作，主要内容包括：本发明涉及钢管弯管技术领域,且公开了一种高精密冷拔无缝钢管弯管装置,包括机架、弯管模、推管塞和液压机构,所述弯管模的中部活动连接有第一触点,所述弯管模内部位于第一触点的底端处开设有活动槽,所述活动槽的右端固定连接有第二触点。本发明通过设计第一、第二触点和电磁层,通过设计推管塞、挡管塞,通过弯管加工时推管塞和夹装滑块带动钢管移动使挡管塞上的通气管进入气腔的内部,同时由于强磁层的接近使磁活塞将储气槽内部的压缩气体挤压入气腔内部,使软质橡胶棒膨胀对钢管的内壁起到支撑作用,避免弯管加工时由于弯曲处的内侧壁与外侧壁的受力大小不同而导致钢管内壁的塌陷和内皱的情况。(The invention relates to the technical field of steel pipe bending, and discloses a high-precision cold-drawing seamless steel pipe bending device which comprises a rack, a pipe bending die, a pipe pushing plug and a hydraulic mechanism, wherein the middle part of the pipe bending die is movably connected with a first contact, a movable groove is formed in the pipe bending die and positioned at the bottom end of the first contact, and the right end of the movable groove is fixedly connected with a second contact. The invention designs the first contact, the second contact and the electromagnetic layer, designs the pipe pushing plug and the pipe blocking plug, drives the steel pipe to move by the pipe pushing plug and the clamping slide block during the pipe bending process so that the vent pipe on the pipe blocking plug enters the air cavity, and simultaneously, the magnetic piston extrudes the compressed gas in the air storage tank into the air cavity due to the approach of the strong magnetic layer so as to ensure that the expansion of the soft rubber rod plays a supporting role on the inner wall of the steel pipe, thereby avoiding the situations of collapse and inner wrinkle of the inner wall of the steel pipe caused by the different stress of the inner side wall and the outer side wall at the bending part during the pipe bending process.)

1. The utility model provides a seamless steel pipe swan neck system of high-accuracy cold drawing, includes frame (1), bending die (3), ejector sleeve stopper (6) and hydraulic pressure mechanism (7), its characterized in that: the middle part of the pipe bending die (3) is movably connected with a first contact (31), the bottom part of the pipe bending die (3) which is positioned at the first contact (31) is provided with a movable groove (32), the right end of the movable groove (32) is fixedly connected with a second contact (33), the lower side of the pipe bending die (3) which is positioned at the movable groove (32) is fixedly provided with an electromagnetic layer (34), the outer side of the pipe bending die (3) is provided with a pipe bending groove (35), the outer side of the left side protruding part of the pipe pushing plug (6) is clamped with a steel pipe (61), the left end face of the left side protruding part of the pipe pushing plug (6) is fixedly connected with a soft rubber rod (62), the outer side of the soft rubber rod (62) is fixedly connected with a strong magnetic layer (63), the inner part of the soft rubber rod (62) is provided with an air cavity (64), and the top end of the hydraulic mechanism (7) is movably hinged with a supporting plate (71), the middle part of layer board (71) leans on left fixedly connected with to keep off pipe plug (72), air vent (73) have been seted up to layer board (71) inside, the inside of keeping off pipe plug (72) is located right side fixedly connected with gas compression mechanism (74) of air vent (73), the inside of keeping off pipe plug (72) is located the right side of gas compression mechanism (74) and has seted up gas storage tank (75), the inside swing joint of gas storage tank (75) has magnetic piston (76), the right-hand member face fixedly connected with pressure spring (77) of magnetic piston (76), the right-hand member of pressure spring (77) and the right-hand member face fixed connection of gas storage tank (75), the right-hand member face fixedly connected with breather pipe (78) of gas storage tank (75).

2. The high-precision cold-drawing seamless steel tube bending device according to claim 1, characterized in that: the first contact (31) is located inside the pipe bending die (3) and movably sleeved on a rotating shaft connected with the pipe bending die (3) and the side plate (2), and the first contact (31) does not rotate along with the rotation of the pipe bending die (3) when the pipe bending die (3) rotates.

3. The high-precision cold-drawing seamless steel tube bending device according to claim 1, characterized in that: the magnetic force of the control electromagnetic layer (34) is increased when the first contact (31) and the second contact (33) are contacted, and the movable slot (32) is electrically connected with the electromagnetic layer (34) through a lead.

4. The high-precision cold-drawing seamless steel tube bending device according to claim 1, characterized in that: the magnetism of the electromagnetic layer (34) is opposite to that of the strong magnetic layer (63), the magnetism of the strong magnetic layer (63) is opposite to that of the magnetic piston (76), and a hole for compressed gas to flow out is formed in the middle of the magnetic piston (76).

5. The high-precision cold-drawing seamless steel tube bending device according to claim 1, characterized in that: when the leftmost side of the soft rubber rod (62) moves to contact with the right end face of the pipe blocking plug (72), the vent pipe (78) is communicated with the air cavity (64), and the soft rubber rod (62) is made of easily expandable soft rubber.

Technical Field

The invention relates to the technical field of steel pipe bending, in particular to a high-precision cold-drawing seamless steel pipe bending device.

Background

The high-precision cold-drawn seamless steel tube is a precision seamless steel tube which is used for mechanical structures and hydraulic equipment and has high dimensional precision and good surface finish, can save processing working hours, improve the utilization rate of materials and be beneficial to improving the product quality, and the steel tube produced by the cold-drawing technology has the advantages of bearing larger pressure, high precision of finished products, good surface quality and the like.

However, in the case of processing high-precision bent pipes, because the cold-drawn pipes belong to high-precision steel pipes formed in one step, the stress on the inner side of the pipe wall is greater than that on the outer side during the pipe bending processing, so that the phenomena of collapse and inner wrinkle occur at the bent parts on the inner side of the hollow steel pipe, and the precision of the cold-drawn pipes after bending is reduced, so that the required precision level cannot be reached, and because the two ends of the steel pipes can only be fixed during the pipe bending, the steel pipes can be separated from the pipe bending grooves due to the stress of the steel pipes during the processing, and unnecessary loss is easily caused by the occurrence of waste.

Disclosure of Invention

Aiming at the defects of the existing pipe bending device in the prior art in the using process, the invention provides the high-precision cold-drawing seamless steel pipe bending device which has the advantages of preventing the inner wall of a steel pipe from collapsing and wrinkling during pipe bending and facilitating the fixation of the steel pipe during pipe bending, and solves the technical problems in the prior art.

The invention provides the following technical scheme: a high-precision cold-drawing seamless steel tube bending device comprises a rack, a pipe bending die, a pipe pushing plug and a hydraulic mechanism, wherein the middle part of the pipe bending die is movably connected with a first contact, a movable groove is formed in the pipe bending die and positioned at the bottom end of the first contact, a second contact is fixedly connected with the right end of the movable groove, an electromagnetic layer is fixedly arranged in the pipe bending die and positioned at the lower side of the movable groove, a pipe bending groove is formed in the outer side of the pipe bending die, a steel tube is clamped and connected to the outer side of a protruding part on the left side of the pipe pushing plug, a soft rubber rod is fixedly connected to the left end face of the protruding part on the left side of the pipe pushing plug, a strong magnetic layer is fixedly connected to the outer side of the soft rubber rod, an air cavity is formed in the soft rubber rod, a supporting plate is movably hinged to the top end of the hydraulic mechanism, a pipe blocking plug is fixedly connected to the left side of the middle part of the supporting plate, and an air vent is formed in the supporting plate, the utility model discloses a keep off pipe stopper, including fender pipe stopper, air storage tank, magnetism piston, right-hand member face fixedly connected with pressure spring, the right-hand member face fixedly connected with breather pipe of air storage tank, the inside of fender pipe stopper is located the right side fixedly connected with gas compression mechanism of air vent, the air storage tank has been seted up on the inside of fender pipe stopper is located gas compression mechanism's right side, the inside swing joint of air storage tank has the magnetism piston, the right-hand member face fixedly connected with pressure spring of magnetism piston, the right-hand member of pressure spring and the right-hand member face fixed connection of air storage tank, the right-hand member face fixedly connected with breather pipe of air storage tank.

Preferably, the first contact is located inside the bending die and movably sleeved on a rotating shaft connected with the side plate, and the first contact does not rotate along with the rotation of the bending die when the bending die rotates.

Preferably, the magnetic force of the control electromagnetic layer is increased when the first contact and the second contact are contacted, and the movable slot is electrically connected with the electromagnetic layer through a lead.

Preferably, the magnetism of the electromagnetic layer is opposite to that of the strong magnetic layer, the magnetism of the strong magnetic layer is opposite to that of the magnetic piston, and a hole for conveying compressed gas is formed in the middle of the magnetic piston.

Preferably, the vent pipe is communicated with the air cavity when the leftmost side of the soft rubber rod moves to be in contact with the right end face of the pipe blocking plug, and the soft rubber rod is made of soft rubber which is easy to expand.

The invention has the following beneficial effects:

1. the invention designs the first contact, the second contact and the electromagnetic layer, designs the pipe pushing plug and the pipe blocking plug, drives the steel pipe to move by the pipe pushing plug and the clamping slide block during the pipe bending process so that the vent pipe on the pipe blocking plug enters the air cavity, and simultaneously, the magnetic piston extrudes the compressed gas in the air storage tank into the air cavity due to the approach of the strong magnetic layer so as to ensure that the expansion of the soft rubber rod plays a supporting role on the inner wall of the steel pipe, thereby avoiding the situations of collapse and inner wrinkle of the inner wall of the steel pipe caused by the different stress of the inner side wall and the outer side wall at the bending part during the pipe bending process.

2. According to the invention, through designing the first contact, the second contact and the electromagnetic layer, through designing the push pipe plug and the blocking pipe plug, the situation that the steel pipe is extruded out of the clamp when the steel pipe is stressed and bent can be prevented through the soft rubber rod designed on the push pipe plug, the precision of the steel pipe is prevented from being influenced after the high-precision steel pipe is dropped, meanwhile, the first contact inside the bending pipe die is contacted with the second contact when the bending pipe die rotates to process the steel pipe, the magnetic force of the electromagnetic layer is increased to adsorb the strong magnetic layer on the outer side of the soft rubber rod, the steel pipe is enabled to be attached to a bending pipe groove on the bending pipe die, and the steel pipe is prevented from sliding out of the bending pipe groove due to stress when the bending pipe.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a pipe bending die in a rotating state according to the present invention;

FIG. 3 is a schematic structural view of the steel pipe of the present invention in an unbent state;

FIG. 4 is a schematic view of the structure of the soft rubber rod in contact with the stopper tube according to the present invention;

FIG. 5 is a structural view illustrating a bent state of the steel pipe according to the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a frame; 2. a side plate; 3. bending a pipe die; 31. a first contact; 32. a movable groove; 33. a second contact; 34. an electromagnetic layer; 35. a pipe bending groove; 4. a carriage; 5. clamping a sliding block; 6. pushing the pipe plug; 61. a steel pipe; 62. a soft rubber rod; 63. a ferromagnetic layer; 64. an air cavity; 7. a hydraulic mechanism; 71. a support plate; 72. a pipe blocking plug; 73. a vent hole; 74. a gas compression mechanism; 75. an air storage tank; 76. a magnetic piston; 77. a pressure spring; 78. a breather tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a high-precision cold-drawing seamless steel tube bending device comprises a frame 1, a side plate 2 fixedly connected to the right side of the top end of the frame 1, a pipe bending die 3 movably connected to the top of the side plate 2, a carriage 4 fixedly connected to the middle of the right side of the side plate 2, a clamping slide block 5 slidably connected to the carriage 4, a pipe pushing plug 6 slidably connected to the carriage 4, and a hydraulic mechanism 7 fixedly connected to the left side of the middle of the top end of the frame 1.

Referring to fig. 1 and 2, a first contact 31 is movably connected to a middle portion of the bending die 3, the first contact 31 is located inside the bending die 3 and movably sleeved on a rotating shaft connecting the bending die 3 and the side plate 2, the first contact 31 does not rotate along with the rotation of the bending die 3 when the bending die 3 rotates, it is ensured that the rotation of the bending die 3 during the bending process can cause the first contact 31 and the second contact 33 to be contacted and communicated, and simultaneously it is ensured that the first contact 31 and the second contact 33 can be always contacted and communicated when the bending die 3 rotates, a movable groove 32 is formed at a bottom end of the first contact 31 inside the bending die 3, the second contact 33 is fixedly connected to a right end of the movable groove 32, an electromagnetic layer 34 is fixedly arranged at a lower side of the movable groove 32 inside the bending die 3, a magnetic force controlling the electromagnetic layer 34 is increased when the first contact 31 and the second contact 33 are contacted, the movable groove 32 is electrically connected with the electromagnetic layer 34 through a conducting wire, the magnetic force of the electromagnetic layer 34 is increased through the contact communication of the first contact 31 and the second contact 33 along with the rotation of the pipe bending die 3, the adsorption of the electromagnetic layer 34 to the strong magnetic layer 63 is promoted, the electromagnetic layer 34 is electrically connected with the second contact 33 through a lead, and the pipe bending groove 35 is formed in the outer side of the pipe bending die 3.

Referring to fig. 3, 4, 5 and 6, a steel pipe 61 is clamped on the outer side of the left protruding portion of the plunger 6, a soft rubber rod 62 is fixedly connected to the left end face of the left protruding portion of the plunger 6, a strong magnetic layer 63 is fixedly connected to the outer side of the soft rubber rod 62, an air cavity 64 is formed in the soft rubber rod 62, and the adhesion between the steel pipe 61 and the elbow groove 35 can be promoted by the adsorption of the electromagnetic layer 34 on the strong magnetic layer 63, so that the steel pipe 61 is more stably fixed on the elbow groove 35.

Referring to fig. 3, 4, 5 and 6, a supporting plate 71 is movably hinged to the top end of the hydraulic mechanism 7, a tube stopper 72 is fixedly connected to the left side of the middle portion of the supporting plate 71, a vent hole 73 is formed in the supporting plate 71, a gas compression mechanism 74 is fixedly connected to the right side of the vent hole 73 in the tube stopper 72, a gas storage tank 75 is formed in the right side of the gas compression mechanism 74 in the tube stopper 72, a magnetic piston 76 is movably connected to the inside of the gas storage tank 75, the magnetism of the electromagnetic layer 34 is opposite to that of the ferromagnetic layer 63, the magnetism of the ferromagnetic layer 63 is opposite to that of the magnetic piston 76, a hole for compressed gas to flow out is formed in the middle portion of the magnetic piston 76, it is ensured that the compressed gas in the gas storage tank 75 can be squeezed into the gas chamber 64 by the magnetic piston 76, a compression spring 77 is fixedly connected to the right end surface of the magnetic piston 76, the right end of the compression spring 77 is fixedly connected to the right end surface of the gas storage tank 75, and a vent pipe 78 is fixedly connected to the right end surface of the gas storage tank 75, the ventilation pipe 78 is communicated with the air cavity 64 when the leftmost side of the soft rubber rod 62 moves to be in contact with the right end face of the pipe blocking plug 72, and the soft rubber rod 62 is made of soft rubber which is easy to expand, so that the compressed air entering the air cavity 64 can enable the soft rubber rod 62 to expand to support the steel pipe 61.

Referring to fig. 1 to 6, when a steel pipe 61 is bent, the steel pipe 61 is pushed into a pipe bending groove 35 and a pipe stopper 72 by sliding of a clamping slider 5 and a pipe pushing plug 6, the steel pipe 61 is bent by pivoting a support plate 71 by rising of a hydraulic mechanism 7, a soft rubber rod 62 is communicated with a vent pipe 78 by moving the pipe pushing plug 6, and compressed gas sucked by a gas compression mechanism 74 in a gas storage tank 75 is released into a gas cavity 64 by adsorption of a ferromagnetic layer 63 on a magnetic piston 76, so that the soft rubber rod 62 is expanded to support the inner wall of the steel pipe 61, thereby preventing collapse and corrugation of the inner wall of the steel pipe 61 caused by different forces on the inner and outer side walls of the bent part during the pipe bending process, and increasing the magnetic force of the electromagnetic layer 34 by communicating a first contact 31 with a second contact 33 by rotation of the pipe bending die 3, adsorb strong magnetic layer 63, make the laminating of steel pipe 61 and return bend groove 35 inseparabler, avoid adding man-hour because the steel pipe 61 atress is extruded return bend groove 35, simultaneously because the adsorption of electromagnetic layer 34 to strong magnetic layer 63 makes the contact of soft rubber stick 62 and steel pipe 61 inner wall laminate more, further strengthened the supporting role to steel pipe 61 inner wall.

The use method (working principle) of the invention is as follows:

firstly, the steel pipe 61 is sleeved on the outer side of the soft rubber rod 62, the steel pipe enters the pipe bending die 3 through the sliding of the clamping slide block 5 and the pipe pushing plug 6 and is bent by the rising of the hydraulic mechanism 7, the first contact 31 is contacted with the second contact 33 through the rotation of the pipe bending die 3, the magnetic force of the electromagnetic layer 34 is increased to enable the electromagnetic layer 34 to adsorb the ferromagnetic layer 63, the inner side wall of the bent part of the steel pipe 61 is closely attached to the inner side wall of the bent part of the steel pipe 62 to support the inner side wall of the bent part of the steel pipe 61, meanwhile, the adhesion between the bent part of the steel pipe 61 and the pipe bending groove 35 is more stable due to the adsorption of the electromagnetic layer 63 by the electromagnetic layer 34, the steel pipe 61 is prevented from sliding out of the pipe bending groove 35 due to stress during pipe bending, meanwhile, the pipe 78 on the pipe blocking plug 72 extends into the air cavity 64 after the sliding of the steel pipe 61 is enabled to slide by the clamping slide block 5 and the pipe pushing plug 6, and compressed air in the air storage tank 75 is input into the air cavity 64, the soft rubber rod 62 is expanded, so that the soft rubber rod 62 can support the inside of the steel tube 61, and the phenomena of collapse and corrugation of the inner wall of the steel tube 61 caused by different stress of the inner side wall and the outer side wall of the bent part of the steel tube 61 during pipe bending are avoided.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.