A pipe bending mold

Abstract

This application provides a pipe bending mold, including a first part and a second part, which are detachably connected. The first part has a curved groove extending circumferentially along the first part, and the second part has a first straight groove extending tangentially along the first part. One end of the curved groove is provided with a first port, and one end of the first straight groove is provided with a third port, which is connected to the first port. Since the first part containing the curved groove and the second part containing the first straight groove are detachably connected, different first parts can be switched on the same second part as needed to obtain curved grooves of different lengths, so as to produce pipe sections of different lengths. Similarly, different second parts can be switched on the same first part as needed to obtain first straight grooves of different lengths, so as to produce straight pipe sections of different lengths, thus providing high versatility.

Description

Technical Field

[0001] This application relates to the field of pipe fitting processing technology, and in particular to a pipe bending mold for processing bends in air conditioning systems. Background Technology

[0002] Bending straight pipes into curved pipes requires a bending mold. A bending mold has a straight groove and a curved groove. Currently, the straight groove and curved groove sections of most bending molds on the market are machined as a single unit using CNC engraving, resulting in high processing costs. Furthermore, the lengths of both the straight and curved groove sections cannot be adjusted after machining, thus limiting the production of only straight and curved pipe sections of fixed length, limiting their versatility. Utility Model Content

[0003] This application provides a highly versatile pipe bending mold, the specific solution of which is as follows:

[0004] A pipe bending mold includes a first part and a second part, which are assembled together. The first part has a curved groove extending along an arc, and the second part has a first straight groove extending along a straight line. One end of the curved groove is provided with a first port, and one end of the first straight groove is provided with a third port, and the first port and the third port are connected.

[0005] The pipe bending mold provided in this application has high versatility because the first part containing the bending groove and the second part containing the first straight groove are detachably connected. Therefore, different first parts can be switched on the same second part to obtain bending grooves of different lengths, enabling the production of pipe sections of different lengths. Similarly, different second parts can be switched on the same first part to obtain first straight grooves of different lengths, enabling the production of straight pipe sections of different lengths. Furthermore, the first and second parts can be machined independently using milling and turning methods, resulting in low processing costs. Attached Figure Description

[0006] Figure 1 A perspective view of one embodiment of the pipe bending mold provided in this application;

[0007] Figure 2 for Figure 1 Top view;

[0008] Figure 3 for Figure 1 The main view;

[0009] Figure 4 This is a three-dimensional schematic diagram of the first component;

[0010] Figure 5 for Figure 4 Top view;

[0011] Figure 6 for Figure 4 The main view;

[0012] Figure 7 This is a three-dimensional schematic diagram of the second component;

[0013] Figure 8 for Figure 7 Top view;

[0014] Figure 9 for Figure 7 The main view;

[0015] Figure 10 This is a front view schematic diagram of the clamping block;

[0016] Figure 11 This is a top view of the clamping block.

[0017] The annotations in the attached figures are explained as follows:

[0018] 100 First split part, 101 Bent groove, 101a First port, 101b Second port, 102 Arc-shaped side, 103 First end face, 104 Second end face, 105 Notch, 105a First wall, 105b Second wall, 106 Limiting recess, 107 First positioning groove, 108 Threaded hole;

[0019] 200 Second split, 201 First straight groove, 201a Third port, 201b Fourth port, 202 First side, 203 Second side, 204 Third side, 205 Fourth side, 206 Through hole, 207 Limiting protrusion, 208 First anti-slip groove.

[0020] 300 Clamping block, 301 Second straight groove, 302 Fifth side, 303 Sixth side, 304 Seventh side, 305 Eighth side, 306 Ninth side, 307 Tenth side, 308 Second positioning groove, 309 Second anti-slip groove;

[0021] 400 clamping hole. Detailed Implementation

[0022] To make this application clearer, specific embodiments are described below with reference to the accompanying drawings.

[0023] like Figures 1-3 As shown, the pipe bending mold provided in this application includes at least a first split 100 and a second split 200. In this embodiment, the pipe bending mold further includes a clamping block 300, which can cooperate with the second split 200 to clamp the pipe fitting.

[0024] The first component 100 and the second component 200 are detachably connected.

[0025] The first segment 100 has a curved groove 101 extending circumferentially along the first segment 100. Specifically, the first segment 100 is a columnar body with an arcuate side surface 102. The circumferential direction of the first segment 100 refers to the circumferential direction of the arcuate side surface 102, and the curved groove 101 is recessed inward from the arcuate side surface 102.

[0026] The second part 200 has a first straight groove 201 extending along the first tangential direction of the first part 100. The first tangential direction refers to the tangential direction of the arcuate side surface 102. In this embodiment, the first tangential direction is perpendicular to the axial direction of the arcuate side surface 102.

[0027] One end of the curved groove portion 101 extending in the direction of extension is provided with a first port 101a. One end of the first straight groove portion 201 extending in the direction of extension is provided with a third port 201a, and the first port 101a and the third port 201a are connected to each other. When the first port 101a and the third port 201a are connected, the curved groove portion 101 and the first straight groove portion 201 are connected to form a continuous pipe groove, which ensures the normal realization of the pipe bending function of the pipe bending mold.

[0028] The clamping block 300 is provided with a second straight groove 301. The groove opening of the second straight groove 301 can be connected with the groove opening of the first straight groove 201. In the connected state, the second straight groove 301 extends along the first tangential direction. The groove wall of the first straight groove 201 and the groove wall of the second straight groove 301 surround each other to form a clamping hole 400 so as to clamp the pipe fitting.

[0029] The aforementioned pipe bending mold features a detachable connection between the first segment 100 containing the bending groove 101 and the second segment 200 containing the first straight groove 201. This allows for the switching of different first segments 100 on the same second segment 200 to obtain bending grooves 101 of varying lengths, enabling the production of pipe sections of different lengths. Similarly, different second segments 200 on the same first segment 100 can be used to obtain first straight grooves 201 of varying lengths, enabling the production of straight pipe sections of different lengths. Therefore, the mold offers good versatility. Furthermore, the first segment 100 and the second segment 200 can be machined independently using milling and turning, reducing processing costs compared to the previous integrated CNC engraving method.

[0030] Specifically, the detachable connection method of the first component 100 and the second component 200 includes, but is not limited to, threaded connection and snap-fit. In this embodiment, the first component 100 and the second component 200 are detachably connected by threaded fasteners.

[0031] like Figures 4-6As shown, in this embodiment, the first part 100 has a first end face 103, a second end face 104, and an arcuate side face 102 connecting the first end face 103 and the second end face 104. The curved groove portion 101 is recessed inward from the arcuate side face 102, thereby forming a groove on the arcuate side face 102. In use, the pipe can enter the curved groove portion 101 through the groove and abut against the groove wall of the curved groove portion 101.

[0032] In this embodiment, the cross-section of the curved groove 101 is semi-circular, so that the groove wall of the curved groove 101 can closely abut and fit against the outer circumferential surface of the circular tube.

[0033] In this embodiment, the first segment 100 has a notch 105, which is recessed inward from the arcuate side surface 102. The notch 105 has a first wall surface 105a and a second wall surface 105b, which intersect. The side of the first wall surface 105a away from the second wall surface 105b intersects the arcuate side surface 102, and the side of the second wall surface 105b away from the first wall surface 105a intersects the arcuate side surface 102. The curved groove portion 101 extends circumferentially from the first wall surface 105a to the second wall surface 105b, thereby forming the aforementioned first port 101a on the first wall surface 105a and the second port 101b on the second wall surface 105b.

[0034] In this embodiment, the first wall surface 105a and the second wall surface 105b are perpendicular, that is, the included angle between the first wall surface 105a and the second wall surface 105b is equal to 90°, which facilitates processing. Alternatively, the included angle between the first wall surface 105a and the second wall surface 105b can also be less than 90° or greater than 90°.

[0035] In this embodiment, a limiting recess 106 is provided on the second wall surface 105b, which cooperates with the limiting protrusion 207 on the second sub-body 200 to limit the relative position of the first sub-body 100 and the second sub-body 200. More specifically, the limiting recess 106 is located on the side of the second wall surface 105b closer to the first wall surface 105a, which facilitates the processing of the limiting recess 106. It should be noted that the positions of the limiting recess 106 and the limiting protrusion 207 can be interchanged, that is, the limiting protrusion is provided on the second wall surface 105b, and the limiting recess is provided on the second sub-body 200.

[0036] In this embodiment, the first part 100 is provided with a threaded hole 108 for connecting threaded fasteners so that the first part 100 and the second part 200 can be connected by threaded fasteners.

[0037] In this embodiment, the opening of the threaded hole 108 is located on the second wall surface 105b. Thus, the threaded fastener connected to the threaded hole can withstand less shear force under the limiting action of the limiting recess 106 and the limiting protrusion 207, resulting in higher connection reliability. More specifically, in this embodiment, two rows of threaded holes are sequentially spaced along the axial direction of the first split 100, with two threaded holes in each row. The second port 101b of the curved groove 101 is located between the two rows of threaded holes. This ensures a reliable connection between the first split 100 and the second split 200 while preventing the threaded holes from damaging the integrity of the groove wall of the curved groove 101.

[0038] In this embodiment, the first part 100 is provided with a central hole, which extends from the first end face 103 to the second end face 104. The central hole can be used to position the columnar body when machining the curved groove 101. In addition, the central hole also plays a role in reducing weight.

[0039] In this embodiment, the first split part 100 is provided with a first positioning groove 107, which is recessed inward from the second end face 104. In use, the first positioning groove 107 can cooperate with the boss on the pipe bending machine to position the first split part 100.

[0040] like Figures 7-9 As shown, in this embodiment, the second split 200 has a first side surface 202, a second side surface 203 located opposite the first side surface 202, a third side surface 204 connecting one side of the first side surface 202 and one side of the second side surface 203, and a fourth side surface 205 located opposite the third side surface 204. A first straight groove portion 201 is recessed inward from the first side surface 202, thereby forming a groove on the first side surface 202. The first straight groove portion 201 extends from the third side surface 204 along a first tangential direction to the fourth side surface 205, thereby forming the aforementioned third port 201a on the third side surface 204 and the fourth port 201b on the fourth side surface 205. When the third port 201a of the first straight groove portion 201 is engaged with the first port 101a of the curved groove portion 101, the third side surface 204 of the second split 200 is in contact with the aforementioned first wall surface 105a of the first split 100.

[0041] In this embodiment, with the third port 201a of the first straight groove 201 aligned with the first port 101a of the curved groove 101, the second side 203 of the second split 200 is in contact with the aforementioned second wall surface 105b of the first split 100. In this way, when assembling the first split 100 and the second split 200, by having the two sides (second side 203 and third side 204) of the second split 200 respectively align with the two walls (second wall surface 105b and first wall surface 105a) of the notch 105 of the first split 100, the relative positions of the first split 100 and the second split 200 can be quickly determined, thereby accelerating the assembly speed.

[0042] In this embodiment, the cross-section of the first straight groove 201 is semi-circular, and the diameter of the first straight groove 201 is the same as the diameter of the curved groove 101.

[0043] In this embodiment, the second side surface 203 is provided with a limiting protrusion 207, which is used to cooperate with the limiting recess 106 on the second wall surface 105b of the first part 100 to limit the relative position of the first part 100 and the second part 200. In this way, when assembling the threaded fastener, the relative position of the first part 100 and the second part 200 is constrained, thereby facilitating the assembly of the threaded fastener.

[0044] In this embodiment, the second part 200 is provided with a through hole 206 for threaded fasteners to pass through. The through hole 206 extends from the first side 202 to the second side 203. The threaded section of the threaded fastener passes through the through hole 206 and is screwed into the threaded hole 108 of the first part 100. The head of the threaded fastener may also be located in the through hole 206 to prevent the head of the threaded fastener from affecting the docking of the second part 200 and the clamping block 300.

[0045] In this embodiment, the groove wall of the first straight groove 201 is provided with multiple (two or more) first anti-slip grooves 208. The depth of the first anti-slip grooves 208 is preferably 0.2mm-1mm, and for example, it can be equal to 0.2mm, 0.5mm, 0.8mm, or 1mm.

[0046] In this embodiment, the first anti-slip groove 208 extends circumferentially along the clamping hole 400, and multiple first anti-slip grooves 208 are sequentially spaced apart in the extending direction of the first straight groove portion 201. This makes the first anti-slip groove 208 easy to process and provides good anti-slip effect.

[0047] In this embodiment, the first anti-slip groove 208 has a first gap between its two ends in the extending direction and the first side surface 202. Specifically, the groove wall of the first anti-slip groove 201 and the first side surface 202 have two intersection lines, namely the first intersection line A and the second intersection line B. The two ends of the first anti-slip groove 208 do not extend to the first intersection line A or the second intersection line B. If the first anti-slip groove 208 extends to these two intersection lines, sharp parts will be generated on these two intersection lines. When the first straight groove 201 and the second straight groove 301 cooperate to clamp the pipe, the sharp parts will generate deep clamping marks on the surface of the pipe, affecting the surface quality of the pipe and even requiring further processing steps to eliminate the clamping marks. This application avoids the generation of sharp parts by having the two ends of the first anti-slip groove 208 in the extending direction spaced apart from the first side surface 202, thereby avoiding the sharp parts from generating deep clamping marks on the surface of the pipe.

[0048] In this embodiment, the length of the first spacing in the direction perpendicular to the first side 202 is S1. The range of S1 is preferably 3mm-5mm. For example, S1 can be equal to 3mm, 4mm or 5mm. Controlling S1 within this range can both avoid deep marks on the surface of the pipe and ensure anti-slip effect.

[0049] like Figure 10 and Figure 11 As shown, in this embodiment, the clamping block 300 has a fifth side surface 302 and a sixth side surface 303 located opposite the fifth side surface 302, and also has a seventh side surface 304 and an eighth side surface 305 located opposite the seventh side surface. The seventh side surface 304 is connected between one side of the fifth side surface 302 and one side of the sixth side surface 303, and the eighth side surface 305 is connected between the other side of the fifth side surface 302 and the other side of the sixth side surface 303. The second straight groove portion 301 is recessed inward from the fifth side surface 302, thereby forming a groove on the fifth side surface 302. When the groove of the first straight groove portion 201 is aligned with the groove of the second straight groove portion 301, the first side surface 202 of the second split body 200 and the fifth side surface 302 of the clamping block 300 are in contact. The second straight groove portion 301 extends in a straight line from the seventh side surface 304 to the eighth side surface 305.

[0050] In this embodiment, the cross-section of the second straight groove portion 301 is semi-circular, and the diameter of the second straight groove portion 301 is the same as the diameter of the first straight groove portion 201.

[0051] In this embodiment, the clamping block 300 is provided with a second positioning groove 308, which is recessed inward from the sixth side surface 303. The second positioning groove 308 can cooperate with the positioning boss on the pipe bending machine to position the clamping block 300. More specifically, in this embodiment, the clamping block 300 has a ninth side surface 306 and a tenth side surface 307 located opposite the ninth side surface 306. The ninth side surface 306 is connected between one side of the fifth side surface 302 and one side of the sixth side surface 303, and the tenth side surface 307 is connected between the other side of the fifth side surface 302 and the other side of the sixth side surface 303. The second positioning groove 308 extends in a straight line from the seventh side surface 304 to the eighth side surface 305, and the second positioning groove 308 is a dovetail groove.

[0052] In this embodiment, the second straight groove portion 301 has multiple (two or more) second anti-slip grooves 309 on its groove wall. The depth of the second anti-slip groove 208 is preferably 0.2mm-1mm, and can be 0.2mm, 0.5mm, 0.8mm, or 1mm, for example.

[0053] In this embodiment, the second anti-slip groove 309 extends circumferentially along the clamping hole 400, and multiple second anti-slip grooves 309 are sequentially spaced along the extending direction of the second straight groove portion 301. This makes the second anti-slip groove 309 easy to manufacture and provides good anti-slip effect.

[0054] In this embodiment, the second anti-slip groove 309 has a second gap between its two ends in the extending direction and the fifth side surface 302. Specifically, the groove wall of the second anti-slip groove 301 and the fifth side surface 302 have two intersection lines, namely the third intersection line C and the fourth intersection line D. The two ends of the second anti-slip groove 309 do not extend to the third intersection line C, nor to the fourth intersection line D. If the second anti-slip groove 309 extends to these two intersection lines, sharp parts will be generated on these two intersection lines. When the second straight groove 301 and the first straight groove 201 cooperate to clamp the pipe fitting, the sharp parts will generate deep clamping marks on the surface of the pipe fitting, affecting the surface quality of the pipe fitting and even requiring further processing steps to eliminate the clamping marks. This application avoids the generation of sharp parts by having the two ends of the second anti-slip groove 309 in the extending direction spaced apart from the fifth side surface 302, thereby avoiding the sharp parts from generating deep clamping marks on the surface of the pipe fitting.

[0055] In this embodiment, the length of the second spacing in the direction perpendicular to the fifth side 302 is S2. The range of S2 is preferably 3mm-5mm. For example, S2 can be equal to 3mm, 4mm or 5mm. Controlling S2 within this range can both avoid deep marks on the surface of the pipe and ensure anti-slip effect.

[0056] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A tube bending die characterized by, The pipe bending mold includes a first part (100) and a second part (200), which are detachably connected. The first part (100) has a curved groove (101) extending circumferentially along the first part (100), and the second part (200) has a first straight groove (201) extending tangentially along the first part (100). One end of the curved groove (101) in the extending direction is provided with a first port (101a), and one end of the first straight groove (201) in the extending direction is provided with a third port (201a). The first port (101a) and the third port (201a) are connected.

2. The pipe bending mold according to claim 1, characterized in that, The pipe bending mold includes a clamping block (300), which has a second straight groove (301). The groove of the second straight groove (301) can be connected with the groove of the first straight groove (201). In the connected state, the second straight groove (301) extends along the first tangential direction, and the groove wall of the first straight groove (201) and the groove wall of the second straight groove (301) surround each other to form a clamping hole (400).

3. The pipe bending mold according to claim 2, characterized in that, The first straight groove (201) has multiple first anti-slip grooves (208) on its groove wall; and / or, The second straight groove (301) has multiple second anti-slip grooves (309) on its groove wall.

4. The pipe bending mold according to claim 3, characterized in that, The first anti-slip groove (208) extends circumferentially along the clamping hole (400), and multiple first anti-slip grooves (208) are sequentially spaced apart in the extending direction of the first straight groove (201); and / or, The second anti-slip groove (309) extends circumferentially along the clamping hole (400), and multiple second anti-slip grooves (309) are sequentially spaced apart in the extending direction of the second straight groove (301).

5. The pipe bending mold according to claim 4, characterized in that, The second split (200) has a first side surface (202), the opening of the first straight groove (201) is located on the first side surface (202), and the first anti-slip groove (208) has a first distance between its two ends in its extending direction and the first side surface (202); and / or, The clamping block (300) has a fifth side surface (302), the groove of the second straight groove (301) is located on the fifth side surface (302), and the second anti-slip groove (309) has a second distance between its two ends in the extending direction and the fifth side surface (302).

6. The pipe bending mold according to claim 5, characterized in that, The length of the first spacing in the direction perpendicular to the first side surface (202) is S1, 3mm ≤ S1 ≤ 5mm; and / or, The length of the second spacing in the direction perpendicular to the fifth side (302) is S2, 3mm≤S2≤5mm.

7. The pipe bending die according to any one of claims 1-6, characterized in that, The first part (100) and the second part (200) are connected by threaded fasteners.

8. The pipe bending mold according to claim 7, characterized in that, The first split body (100) has an arc-shaped side surface (102) and a notch (105). The notch (105) is recessed inward from the arc-shaped side surface (102). The notch (105) has an intersecting first wall surface (105a) and a second wall surface (105b). The first port (101a) is located on the first wall surface (105a). The second split body (200) has an intersecting second side surface (203) and a third side surface (204). The third port (201a) is located on the third side surface (204). The third side surface (204) fits against the first wall surface (105a). The second side surface (203) fits against the second wall surface (105b).

9. The pipe bending mold according to claim 8, characterized in that, The first part (100) is provided with a threaded hole for passing through the threaded fastener, one end of the threaded hole is located on the second wall surface (105b), and the second part (200) is provided with a through hole for passing through the threaded fastener.

10. The pipe bending mold according to claim 8, characterized in that, On the second wall surface (105b) and the second side surface (203), one is provided with a limiting recess (106) and the other is provided with a limiting protrusion (207) adapted to the limiting recess (106).

Images