Metal pipeline bending equipment

Abstract

The invention relates to the technical field of metal pipeline machining, in particular to metal pipeline bending equipment which comprises a fixed die and a movable die which can be opened and closed, bending grooves are formed in the fixed die and the movable die, and the angle and the shape of the bending grooves can be set in advance according to the bending machining requirement. And the shape and the angle of the bent metal pipeline are consistent with those of the bending groove, so that the bending accuracy is ensured. The linear pipe groove is formed in the front end of the bending groove, the electromagnetic coil is arranged on the outer ring of the linear pipe groove, the metal pipeline is heated in advance through the electromagnetic coil so that the metal pipeline can be softened, then the softened metal pipeline is guided into the bending groove through the guide plate, and the metal pipeline can be smoothly bent into the needed shape and angle. The air blowing opening is formed in the bending groove and communicates with the air conveying pipe, the air conveying pipe communicates with an external air source, cold air can be input into the air blowing opening, and the bent metal pipeline is rapidly cooled and shaped.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe processing, and in particular to a metal pipe bending device. Background Art

[0002] Because it is difficult to ensure that some pipelines can be routed in a straight line, and the connection direction is uncertain when the pipelines are connected, it is sometimes necessary to bend the pipelines, especially the ends of metal pipelines.

[0003] In the prior art, bending of metal pipes is generally achieved by mechanical processing, where external force is applied to the metal to force the pipe to bend.

[0004] When the metal pipe is bent in this way, the outer circle of the bend will be stretched, while the inner circle of the bend will be squeezed, thus causing damage to the pipe wall of the metal pipe.

[0005] Therefore, the pipe wall thickness needs to be considered when bending. Excessive bending will cause the wall to expand, increase quality problems, affect pipeline performance, and even easily cause pipe breakage or bursting. In addition, metal pipes cannot be bent repeatedly at the same point to avoid fatigue or breakage of the pipe. At the same time, the number and angle of pipe bends should be minimized.

[0006] For some special processing requirements, such as a large bending angle, an S-shaped bend instead of an arc, etc., the current bending method is difficult to meet, especially for some metal pipes with thinner walls.

[0007] Moreover, the bending of metal pipes in the prior art is often not precise enough, and there is often an error between the bending angle and the actual required angle, which brings inconvenience to the construction. Sometimes, it is necessary to bend twice or even multiple times to adjust the accuracy, which can easily cause irreversible damage to the pipe wall of the metal pipe. Summary of the invention

[0008] In view of this, the purpose of the present invention is to propose a metal pipe bending device to solve the problem in the prior art that metal pipe bending is difficult to meet special processing requirements such as large bending angles and is prone to cause irreversible damage to the pipe wall of the metal pipe.

[0009] Based on the above purpose, the present invention provides a metal pipe bending device, including a fixed die and a movable die that can be opened and closed, and the bending device also includes:

[0010] Matching bending grooves are provided on the opposite end surfaces of the fixed die and the movable die for bending the metal pipe, and a straight pipe groove is provided at the front end of the bending groove;

[0011] An electromagnetic coil is arranged on the outer circle of the linear tube groove, the electromagnetic coil is divided into two halves and fixedly connected in the fixed mold and the movable mold respectively, the fixed mold is provided with a coil plug connector connected to the half circle of the electromagnetic coil, and the movable mold is provided with a coil jack connected to the other half circle of the electromagnetic coil;

[0012] The air blowing port arranged in the bending groove is used for blowing out cold air, and the air blowing port is connected with an external air source through an air delivery pipe.

[0013] Furthermore, the fixed mold is fixedly connected to the base, the movable mold is fixedly connected to the movable seat, a connecting rod is fixedly connected to the base, and the movable seat is slidably connected to the connecting rod.

[0014] Furthermore, the air delivery pipe is fixedly connected to the outer side surface of the base, and an air flow channel is provided in the fixed mold, and two ends of the air flow channel are respectively connected to the air delivery pipe and the air blowing port on the fixed mold.

[0015] Furthermore, the fixed mold is fixedly connected to a cannula, which is connected to the air pipe. The movable mold is also provided with a ventilation socket that matches the cannula. The movable mold is also provided with an air flow channel, and both ends of the air flow channel are respectively connected to the ventilation socket and the air outlet on the movable mold.

[0016] Furthermore, a cable connected to the electromagnetic coil is also provided on the outer side of the base, and the portions of the fixed mold and the movable mold located inside the electromagnetic coil are made of insulating and non-magnetic materials.

[0017] Furthermore, a connecting tube is fixedly connected to the fixed mold, and a connecting groove matching with the connecting tube is provided on the movable mold, and the inner diameter of the connecting groove is the same as the diameter of the connecting tube.

[0018] Furthermore, the front end of the connecting cylinder is open, and a piston plate is slidably connected inside the connecting cylinder. A screw is also provided inside the connecting cylinder, and the screw is threadedly connected to the piston plate, and a knob is fixedly connected to the outer end of the screw. The screw is rotatably connected to the base and the fixed mold, and the knob is rotatably connected to the outer surface of the base.

[0019] Furthermore, a sealing ring is fixedly connected to the outer side of the connecting tube, and an inclined plate groove is provided on the inner wall of the connecting tube. An inclined plate is slidably connected in the inclined plate groove, and one end of the inclined plate is fixedly connected to the bottom of the piston plate. A movable top block is slidably connected to the side wall of the connecting tube, and the outer end of the movable top block is fixedly connected to the sealing ring, and the inner end of the movable top block is slidably connected to the inclined plate.

[0020] Furthermore, a guide plate is provided in the bending groove, and a positioning column having the same inner diameter as the metal pipe is provided at the front end of the guide plate.

[0021] Furthermore, two movable rollers are symmetrically arranged on the outer side wall of the guide plate, and guide grooves are also arranged in the bending grooves on the fixed mold and the movable mold. The inner ends of the movable rollers are rotatably connected to the guide plate, and the outer ends of the movable rollers are slidably connected in the guide grooves.

[0022] Beneficial effects of the present invention: 1. By setting a fixed mold and a movable mold, the fixed mold and the movable mold are combined to bend the metal pipe, and the fixed mold and the movable mold are opened to facilitate the removal of the metal pipe. Bending grooves are set on the fixed mold and the movable mold, and the angle and shape of the bending groove can be set in advance according to the requirements of the bending process. The metal pipe is bent through the bending groove, and the shape and angle of the bent metal pipe will be consistent with the shape and angle of the bending groove, ensuring the accuracy of the bending process.

[0023] 2. A straight pipe groove is set at the front end of the bending groove, and an electromagnetic coil is set on the outer circle of the straight pipe groove. The metal pipe is heated in advance by the electromagnetic coil to soften the metal pipe, and then the softened metal pipe is guided into the bending groove by the guide plate, so that the metal pipe can be smoothly bent into the required shape and angle.

[0024] 3. The connection between the fixed mold and the movable mold is ensured to be reliable by the connection tube and the connection groove. By turning the screw through the knob, the piston plate moves back, and the connection groove becomes a negative pressure environment, so that the connection tube is firmly sucked into the connection groove, so that the fixed mold and the movable mold are tightly closed.

[0025] 4. An air blowing port is arranged in the bending groove. The air blowing port in the fixed mold is connected with the air pipe through the air flow channel, and the air blowing port in the movable mold is connected with the air pipe through the air flow channel and the intubation tube after the mold is closed. The air pipe is connected with an external air source, and cold air can be input into the air blowing port, so that the bent metal pipe can be quickly cooled and quickly shaped. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall structural principle of the device of the present invention.

[0028] Figure 2 It is a structural schematic diagram of the fixed mold in the device of the present invention.

[0029] Figure 3 It is a structural schematic diagram of the movable mold in the device of the present invention.

[0030] Figure 4 It is a schematic diagram of the structural principle of the connecting cylinder part in the device of the present invention.

[0031] Figure 5 The figure is a schematic diagram of the air path structure principle of the air blowing port in the device of the present invention.

[0032] Figure 6 for Figure 2 Enlarged view of part A.

[0033] Figure 7 for Figure 4 Magnified view of part B.

[0034] The markings in the figure are:

[0035] 101. base, 102. fixed mold, 103. movable seat, 104. movable mold, 105. connecting rod, 106. bending groove, 107. blowing port, 108. connecting tube, 109. cannula, 110. coil plug connector, 111. connecting groove, 112. ventilation socket, 113. coil socket, 114. cable, 115. connecting shaft, 116. air pipe, 117. air flow channel, 118. knob, 119. screw, 120. piston plate, 121. sealing ring, 122. inclined plate slide groove, 123. inclined plate, 124. movable top block, 125. guide plate, 126. positioning column, 127. movable roller, 128. guide groove. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] A first aspect of the present invention, as Figure 1 , Figure 2 and Figure 3As shown, the conventional method uses mechanical processing to force the metal pipe to bend by applying external force, which will damage the pipe wall of the metal pipe. Excessive bending will cause the wall surface to expand, which may easily cause the pipe to break or burst. Moreover, for some metal pipes with thinner walls, it is impossible to bend a larger angle. Therefore, the present invention uses heating to match the bending groove 106 to bend the metal pipe.

[0039] Specifically, it includes a fixed die 102 and a movable die 104 that can be opened and closed, and matching bending grooves 106 are provided on the opposite end faces of the fixed die 102 and the movable die 104 for bending the metal pipe, and a straight pipe groove is provided at the front end of the bending groove 106. An electromagnetic coil is provided on the outer circle of the straight pipe groove, and the electromagnetic coil is divided into two halves and fixedly connected in the fixed die 102 and the movable die 104 respectively, and a coil plug connector 110 connected to a half circle of the electromagnetic coil is provided on the fixed die 102, and a coil jack 113 connected to the other half circle of the electromagnetic coil is provided on the movable die 104.

[0040] In addition, the fixed mold 102 is fixedly connected to the base 101, the movable mold 104 is fixedly connected to the movable seat 103, the base 101 is fixedly connected with a connecting rod 105, and the movable seat 103 is slidably connected to the connecting rod 105. The outer side of the base 101 is also provided with a cable 114 connected to the electromagnetic coil.

[0041] The metal pipe is heated in advance by the electromagnetic coil to soften it, and then the softened metal pipe is guided into the bending groove 106 by the guide plate 125, so that the metal pipe can be smoothly bent into a required shape and angle.

[0042] Preferably, the portions of the fixed mold 102 and the movable mold 104 located inside the electromagnetic coil are made of insulating and non-magnetic materials.

[0043] By setting a fixed die 102 and a movable die 104, the fixed die 102 and the movable die 104 are closed to bend the metal pipe, and the fixed die 102 and the movable die 104 are opened to facilitate the removal of the metal pipe. A bending groove 106 is set on the fixed die 102 and the movable die 104, and the angle and shape of the bending groove 106 can be set in advance according to the requirements of the bending process. The metal pipe is bent through the bending groove 106, and the shape and angle of the bent metal pipe will be consistent with the shape and angle of the bending groove 106, ensuring the accuracy of the bending process.

[0044] A second aspect of the present invention, as Figure 2 , Figure 3 and Figure 5As shown, in order to quickly cool and shape the heated metal pipe after bending, to facilitate removal and improve efficiency, a blowing port 107 is provided in the bending groove 106 for blowing out cold air. The bending groove 106 in the fixed mold 102 and the movable mold 104 are both provided with a blowing port 107.

[0045] The blowing port 107 on the fixed mold 102 is connected to the air channel 117 provided in the fixed mold 102. An air delivery pipe 116 is fixedly connected to the outer surface of the base 101, and the other end of the air channel 117 is connected to the air delivery pipe 116, and the other end of the air delivery pipe 116 is connected to an external air source.

[0046] In addition, a cannula 109 is fixedly connected to the fixed mold 102, and the cannula 109 is communicated with the air supply pipe 116, and a ventilation hole 112 matching with the cannula 109 is also provided on the movable mold 104, and an air flow channel 117 is also provided in the movable mold 104, and the two ends of the air flow channel 117 are respectively connected to the ventilation hole 112 and the blowing port 107 on the movable mold 104.

[0047] An external air source can input cold air to the air blowing port 107 through the air delivery pipe 116 and the air flow channel 117, so that the bent metal pipe can be quickly cooled and quickly shaped.

[0048] A third aspect of the present invention is as follows Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, since the fixed mold 102 and the movable mold 104 can be opened and closed, the bending is performed after the fixed mold 102 and the movable mold 104 are closed. Therefore, it is necessary to ensure the tightness of the fixed mold 102 and the movable mold 104 after closing the mold.

[0049] Therefore, a connecting tube 108 is fixedly connected to the fixed mold 102, and a connecting groove 111 matching with the connecting tube 108 is provided on the movable mold 104, and the inner diameter of the connecting groove 111 is the same as the diameter of the connecting tube 108. The front end of the connecting tube 108 is open, and a piston plate 120 is slidably connected in the connecting tube 108. A screw rod 119 is also provided in the connecting tube 108, and the screw rod 119 is threadedly connected to the piston plate 120, and a knob 118 is fixedly connected to the outer end of the screw rod 119, and the screw rod 119 is rotatably connected to the base 101 and the fixed mold 102, and the knob 118 is rotatably connected to the outer surface of the base 101.

[0050] Preferably, a sealing ring 121 is fixedly connected to the outer side of the connecting cylinder 108, and an inclined plate groove 122 is provided on the inner wall of the connecting cylinder 108, in which an inclined plate 123 is slidably connected, one end of the inclined plate 123 is fixedly connected to the bottom of the piston plate 120, and a movable top block 124 is slidably connected to the side wall of the connecting cylinder 108, wherein the outer end of the movable top block 124 is fixedly connected to the sealing ring 121, and the inner end of the movable top block 124 is slidably connected to the inclined plate 123.

[0051] The piston plate 120 is moved backward by rotating the screw rod 119 through the knob 118, and the connection groove 111 is changed into a negative pressure environment, so that the connection tube 108 is firmly sucked into the connection groove 111, so that the fixed mold 102 and the movable mold 104 are tightly molded.

[0052] When the screw 119 drives the piston plate 120 to retreat, it also drives the inclined plate 123 to slide in the inclined plate slot 122. Since the outer side of the inclined plate 123 is inclined, it presses the movable top block 124 to move outward, making the sealing ring 121 more tightly packed, ensuring that the fixed mold 102 and the movable mold 104 are more tightly connected.

[0053] In particular, a guide plate 125 is provided in the bending groove 106, and a positioning column 126 having the same inner diameter as the metal pipe is provided at the front end of the guide plate 125. Two movable rollers 127 are symmetrically provided on the outer side wall of the guide plate 125, and a guide groove 128 is provided in the bending groove 106 on the fixed mold 102 and the movable mold 104. The inner end of the movable roller 127 is rotatably connected to the guide plate 125, and the outer end of the movable roller 127 is slidably connected in the guide groove 128.

[0054] After the metal pipe is softened, the guide plate 125 guides the softened metal pipe into the bending groove 106, so that the metal pipe can be smoothly bent into a required shape and angle.

[0055] In summary, the present invention sets a fixed mold 102 and a movable mold 104, and sets a bending groove 106 on the fixed mold 102 and the movable mold 104. The angle and shape of the bending groove 106 can be set in advance according to the requirements of the bending process. The metal pipe is bent by the bending groove 106, and the shape and angle of the metal pipe after bending will be consistent with the shape and angle of the bending groove 106, ensuring the accuracy of the bending. A straight pipe groove is set at the front end of the bending groove 106, and an electromagnetic coil is set on the outer ring of the straight pipe groove. The metal pipe is heated in advance by the electromagnetic coil to soften the metal pipe, and then the softened metal pipe is guided into the bending groove 106 by the guide plate 125, so that the metal pipe can be smoothly bent into the required shape and angle. The fixed mold 102 and the movable mold 104 are connected by a connecting tube 108 and a connecting groove 111 to ensure the reliability of the connection. The piston plate 120 is retracted by rotating the screw rod 119 through the knob 118, and the connection groove 111 is turned into a negative pressure environment, so that the connection tube 108 is firmly sucked into the connection groove 111, so that the fixed mold 102 and the movable mold 104 are tightly molded. An air blowing port 107 is arranged in the bending groove 106, and the air blowing port 107 is connected to the air supply pipe 116, and the air supply pipe 116 is connected to the external air source, and cold air can be input into the air blowing port 107, so that the bent metal pipe is quickly cooled and quickly shaped.

[0056] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples; within the context of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0057] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A metal pipe bending device, comprising a fixed die (102) and a movable die (104) capable of opening and closing, characterized in that: The bending device also includes: Matching bending grooves (106) are provided on the opposite end surfaces of the fixed mold (102) and the movable mold (104) for bending the metal pipe, and a straight pipe groove is provided at the front end of the bending groove (106); An electromagnetic coil is arranged on the outer circle of the linear tube groove, the electromagnetic coil is divided into two halves and respectively fixedly connected in a fixed mold (102) and a movable mold (104), the fixed mold (102) is provided with a coil plug connector (110) connected to a half circle of the electromagnetic coil, and the movable mold (104) is provided with a coil plug hole (113) connected to the other half circle of the electromagnetic coil; The air blowing port (107) provided in the bending groove (106) is used for blowing out cold air, and the air blowing port (107) is connected to an external air source through an air delivery pipe (116).

2. A metal pipe bending device according to claim 1, characterized in that: The fixed mold (102) is fixedly connected to the base (101), the movable mold (104) is fixedly connected to the movable seat (103), a connecting rod (105) is fixedly connected to the base (101), and the movable seat (103) is slidably connected to the connecting rod (105).

3. The metal pipe bending equipment according to claim 2, characterized in that: The air delivery pipe (116) is fixedly connected to the outer surface of the base (101), and an air flow channel (117) is provided in the fixed mold (102). The two ends of the air flow channel (117) are respectively connected to the air delivery pipe (116) and the air blowing port (107) on the fixed mold (102).

4. The metal pipe bending equipment according to claim 3, characterized in that: The fixed mold (102) is also fixedly connected with a cannula (109), and the cannula (109) is communicated with an air supply pipe (116). The movable mold (104) is also provided with a ventilation plug hole (112) that matches the cannula (109). The movable mold (104) is also provided with an air flow channel (117), and the two ends of the air flow channel (117) are respectively connected to the ventilation plug hole (112) and the air blowing port (107) on the movable mold (104).

5. The metal pipe bending equipment according to claim 2, characterized in that: A cable (114) connected to the electromagnetic coil is also provided on the outer side of the base (101), and the portions of the fixed mold (102) and the movable mold (104) located inside the electromagnetic coil are made of insulating and non-magnetic materials.

6. The metal pipe bending equipment according to claim 2, characterized in that: The fixed mold (102) is also fixedly connected to a connecting tube (108), and the movable mold (104) is provided with a connecting groove (111) that matches the connecting tube (108), and the inner diameter of the connecting groove (111) is the same as the diameter of the connecting tube (108).

7. The metal pipe bending equipment according to claim 6, characterized in that: The front end of the connecting tube (108) is open, and a piston plate (120) is slidably connected inside the connecting tube (108). A screw rod (119) is also provided inside the connecting tube (108). The screw rod (119) is threadedly connected to the piston plate (120), and a knob (118) is fixedly connected to the outer end of the screw rod (119). The screw rod (119) is rotatably connected to the base (101) and the fixed mold (102), and the knob (118) is rotatably connected to the outer surface of the base (101).

8. The metal pipe bending equipment according to claim 7, characterized in that: The outer side of the connecting tube (108) is also fixedly connected to a sealing ring (121), and the inner wall of the connecting tube (108) is also provided with an inclined plate groove (122), and an inclined plate (123) is slidably connected in the inclined plate groove (122), and one end of the inclined plate (123) is fixedly connected to the bottom of the piston plate (120), and a movable top block (124) is slidably connected to the side wall of the connecting tube (108), and the outer end of the movable top block (124) is fixedly connected to the sealing ring (121), and the inner end of the movable top block (124) is slidably connected to the inclined plate (123).

9. A metal pipe bending device according to claim 1 or 2, characterized in that: A guide plate (125) is also provided in the bending groove (106), and a positioning column (126) having the same inner diameter as the metal pipe is provided at the front end of the guide plate (125).

10. The metal pipe bending equipment according to claim 9, characterized in that: Two movable rollers (127) are symmetrically arranged on the outer side wall of the guide plate (125), and guide grooves (128) are also arranged in the bending grooves (106) on the fixed mold (102) and the movable mold (104), the inner ends of the movable rollers (127) are rotatably connected to the guide plate (125), and the outer ends of the movable rollers (127) are slidably connected in the guide grooves (128).

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