Pipe fitting flanging and convex extruding device
By optimizing the mold structure of the pipe flanging and convex extrusion device and combining it with the synchronous operation of the press, the problem of traditional molds requiring multiple positioning is solved, precise flanging and convex extrusion effects are achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202423058526.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-11
AI Technical Summary
During the flanging and convexing process of traditional pipe fittings, the diverse shapes of the workpieces require traditional stamping dies to be repeatedly positioned and processed, resulting in poor positioning accuracy, which affects subsequent production and use.
A pipe flanging and bulging device was designed, which included an upper die, a lower die, and a flanging and expanding core rod. The die structure was optimized to be mirror-symmetrical between the upper and lower dies. A press was combined to perform synchronous flanging and bulging operations. Guide columns were used to improve the clamping accuracy, and the device could be adapted to different size requirements through a detachable flanging forming seat and bulging fixing seat.
The accuracy of the flange and convex position of the pipe is achieved, repeated positioning processing is reduced, space and time are saved, and production efficiency is improved.
Smart Images
Figure CN223367939U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipe fitting manufacturing, and particularly relates to a pipe fitting flanging and convexing device. Background Art
[0002] Cold extrusion is a specialized cold working process that involves plastically deforming metal materials at room temperature. It's primarily used to transform metal or non-metal materials into parts or semi-finished products. The working principle is that the extrusion die, powered by the power of a press, applies pressure to the material through the die, causing it to separate or plastically deform at room temperature, resulting in the desired part shape.
[0003] During the flanging and embossing process of pipe fittings, due to the diverse shapes of the workpieces, traditional stamping dies need to repeat positioning processing many times. Various reasons cause the positioning accuracy of the flanging and embossing of pipe fittings to be poor, affecting subsequent production and use. Utility Model Content
[0004] In view of the above problems, the utility model provides a pipe flanging and convexing device.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A pipe flanging and bulging device comprises an upper mold, a lower mold and a flanging and expanding core rod, the upper mold is fixed on the vertical cylinder fixing seat of the press, the lower mold is fixed on the lower platform of the press, and is located directly below the upper mold, and an upper semicircular groove extending along its length direction is provided on the lower end surface of the upper mold, and a lower semicircular groove extending along its length direction is provided on the upper end surface of the lower mold. When the upper mold is lowered and closed with the lower mold, the upper semicircular groove and the lower semicircular groove form a pipe accommodating groove, and on the pipe accommodating groove, a flanging cavity is provided in the port close to one end of the flanging and expanding core rod, and an extrusion die cavity is provided on the side of the flanging cavity away from the flanging and expanding core rod; the flanging and expanding core rod is fixed on the cylinder fixing seat located in the horizontal direction of the press, and the flanging and expanding core rod is coaxially arranged with the upper semicircular groove and the lower semicircular groove.
[0007] Furthermore, the upper mold includes an upper mold base, an extrusion convex fixing base and a flanging forming base, and a 7-shaped notch extending from its end face along its horizontal axis and along its vertical axis to the opposite end and the lower end face respectively, the extrusion convex fixing base and the flanging forming base are spaced apart in the 7-shaped notch, the extrusion convex fixing base is tightly arranged with the vertical side wall of the 7-shaped notch, and a plurality of springs are connected between the flanging forming base and the extrusion convex fixing base; A semicircular groove section constituting an upper semicircular groove is coaxially provided on the lower end surface of the seat and the flanging forming seat, and the semicircular groove section of the flanging forming seat is recessed inwardly in the port near one end of the flanging expanding core rod to form a semi-flanging cavity, and the adjacent end ports of the flanging forming seat and the extrusion convex fixing seat are recessed inwardly to form a first sub-extrusion convex cavity and a second sub-extrusion convex cavity. The first sub-extrusion convex cavity and the second sub-extrusion convex cavity are spliced to form a semi-extrusion convex cavity when the flanging forming seat and the extrusion convex fixing seat are docked.
[0008] Furthermore, the flanging forming seat and the convex extrusion fixing seat are detachably connected to the upper die seat via a plurality of fixed limit screws extending along the axis direction of the upper semicircular groove;
[0009] Furthermore, the upper mold base also includes a slider fixing plate, which is slidably connected to the top wall of the 7-shaped notch, and the top end surfaces of the flanging forming seat and the extrusion convex fixing seat are slidably connected to the lower end surface of the slider fixing plate.
[0010] Furthermore, a first inverted trapezoidal groove perpendicular to the upper semicircular groove is provided on the top wall of the 7-shaped notch, and a first inverted trapezoidal platform adapted to the inverted trapezoidal groove is provided on the top wall of the slider fixing plate, and the first inverted trapezoidal platform is inserted into the first inverted trapezoidal groove; a plurality of second inverted trapezoidal grooves parallel to the upper semicircular groove are provided on the lower end surface of the slider fixing plate, and a plurality of second inverted trapezoidal platforms and third inverted trapezoidal platforms adapted to the second inverted trapezoidal groove are respectively provided on the upper end surfaces of the flanging forming seat and the extrusion convex fixing seat, and the second inverted trapezoidal platform and the third inverted trapezoidal platform are inserted into the second inverted trapezoidal groove.
[0011] Furthermore, the structure of the lower mold is exactly the same as that of the upper mold, and the upper mold and the lower mold are arranged in mirror symmetry.
[0012] Furthermore, a plurality of sockets are symmetrically provided on both sides of the semicircular grooves of the upper die base and the lower die base and along the central axis direction of the semicircular grooves. The sockets on the upper die base are arranged opposite to the sockets on the lower die base, and guide columns are provided in the sockets.
[0013] This new pipe flanging and bulging device eliminates the need for repeated positioning and secondary processing. The relative positioning of the flanging and bulging is precise, allowing both bulging and flanging to be processed simultaneously, making removal easy. This device effectively integrates with the press, allowing flanging and bulging to be performed simultaneously within the die cavity, saving space and time. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of the pipe flanging and convexing device described in the utility model.
[0015] Figure 2 This is a schematic diagram of the disassembled structure of the pipe flanging and convexing device described in the utility model.
[0016] Figure 3 This is a structural schematic diagram of the upper mold described in the present utility model.
[0017] Figure 4 This is a structural schematic diagram of the lower mold described in the present utility model.
[0018] Among them, 1-upper mold, 2-lower mold, 3-flanging and expanding core rod, 4-pipe fitting, 5-guide column, 6-spring, 7-fixing limit screw, 11-upper mold base, 12-extrusion convex fixing base, 13-flanging forming base, 14-slider fixing plate, 15-upper semicircular groove, 111-7-shaped notch, 112-first inverted trapezoidal groove, 113-jack, 121-second sub-extrusion punch cavity, 122-third inverted trapezoidal platform, 131-semi-flanging cavity, 132-second inverted trapezoidal platform, 133-first sub-extrusion punch cavity, 141-first inverted trapezoidal platform, 142-second inverted trapezoidal groove, 21-lower semicircular groove. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0020] like Figure 1-Figure 2As shown, a pipe flanging and bulging device comprises an upper die 1, a lower die 2 and a flanging and expanding mandrel 3, wherein the upper die 1 is fixed on the vertical cylinder fixing seat of the press, and the lower die 2 is fixed on the lower platform of the press, and is located directly below the upper die 1. An upper semicircular groove 15 extending along its length is provided on the lower end surface of the upper die 1, and a lower semicircular groove 21 extending along its length is provided on the upper end surface of the lower die 2. When the upper die 1 is lowered and aligned with the lower die 2, the upper die 1 is pressed against the lower die 2. When the lower mold 2 is closed, the upper semicircular groove 15 and the lower semicircular groove 21 form a pipe accommodating groove, on which a flanging cavity is provided in the port close to one end of the flanging and expanding core rod 3, and an extrusion punch cavity is provided on the side of the flanging cavity away from the flanging and expanding core rod 3; the flanging and expanding core rod 3 is fixed on the cylinder fixing seat located in the horizontal direction of the press, and the flanging and expanding core rod 3 is coaxially arranged with the upper semicircular groove 15 and the lower semicircular groove 21.
[0021] It is understood that when the tube 4 is placed in the tube receiving groove, the side wall of the tube 4 at one end adjacent to the flanging and flaring mandrel 3 forms a flange within the flanging cavity, while simultaneously forming a convex section within the convex die cavity. By effectively combining the device of the present invention with a press, flanging and convexing can be performed simultaneously within the die cavity, saving space and time.
[0022] In some embodiments, the upper mold 1 includes an upper mold base 11, an extrusion convex fixing base 12 and a flanging forming base 13, and a 7-shaped notch 111 is provided at one end of the upper mold base 11, which extends from the end face of the end along its horizontal axis and along its vertical axis to the opposite end and the lower end face respectively, the extrusion convex fixing base 12 and the flanging forming base 13 are spaced apart in the 7-shaped notch 111, the extrusion convex fixing base 12 is tightly arranged with the vertical side wall of the 7-shaped notch 111, and a plurality of springs 6 are connected between the flanging forming base 13 and the extrusion convex fixing base 12; A semicircular groove section constituting an upper semicircular groove 15 is coaxially provided on the lower end surface of the fixing seat 12 and the flanging forming seat 13. The semicircular groove section of the flanging forming seat 13 is recessed inwardly near the port at one end of the flanging expanding core rod 3 to form a semi-flanging cavity 131. The adjacent end ports of the flanging forming seat 13 and the extrusion convex fixing seat 12 are recessed inwardly to form a first sub-extrusion convex cavity 133 and a second sub-extrusion convex cavity 121. The first sub-extrusion convex cavity 133 and the second sub-extrusion convex cavity 121 are spliced to form a semi-extrusion convex cavity when the flanging forming seat 13 and the extrusion convex fixing seat 12 are docked.
[0023] It can be understood that the end of the pipe fitting 4 is formed into a flanging under the extrusion of the flanging and expanding core rod 3. As the flanging and expanding core rod is extruded, the flanging forming seat 13 moves toward the extrusion forming seat until it abuts against the extrusion forming seat. In this process, the corresponding tube wall section of the pipe fitting 4 is extruded into the extrusion die cavity to form an extrusion convex section.
[0024] Furthermore, the flanging forming seat 13 and the convex bulging fixing seat 12 are detachably connected to the upper die seat 11 via a plurality of fixing limit screws 7 extending along the axial direction of the upper semicircular groove 15 .
[0025] It can be understood that the flanging forming seat 13 and the convex convex fixing seat 12 are set to be detachably connected to the upper mold seat 11, which is convenient for replacing the flanging forming seat 13 and the convex convex fixing seat 12 according to the flanging and convex dimensional requirements of the produced pipe 4.
[0026] Furthermore, the upper mold base 11 also includes a slider fixing plate 14, which is slidably connected to the top wall of the 7-shaped notch 111, and the top end surfaces of the flanging forming seat 13 and the extrusion convex fixing seat 12 are slidably connected to the lower end surface of the slider fixing plate 14.
[0027] It can be understood that the slider fixing plate 14 is slidably connected to the flanging forming seat 13 and the extrusion bulge fixing seat 12 and then connected to the upper mold base 11, so that the matching flanging forming seat 13 and the extrusion bulge fixing seat 12 always maintain an integral connection, which facilitates the connection of the matching flanging forming seat 13 and the extrusion bulge fixing seat 12 with the upper mold base 11 and saves installation time.
[0028] Specifically, a first inverted trapezoidal groove 112 perpendicular to the upper semicircular groove 15 is provided on the top wall of the 7-shaped notch 111, and a first inverted trapezoidal platform 141 adapted to the first inverted trapezoidal groove 112 is provided on the top wall of the slider fixing plate 14, and the first inverted trapezoidal platform 141 is inserted into the first inverted trapezoidal groove 112; a plurality of second inverted trapezoidal grooves 142 parallel to the upper semicircular groove 15 are provided on the lower end surface of the slider fixing plate 14, and a plurality of second inverted trapezoidal platforms 132 and third inverted trapezoidal platforms 122 adapted to the second inverted trapezoidal groove 142 are respectively provided on the upper end surfaces of the flanging forming seat 13 and the extrusion convex fixing seat 12, and the second inverted trapezoidal platforms 132 and the third inverted trapezoidal platforms 122 are inserted into the second inverted trapezoidal groove 142.
[0029] Specifically, the structure of the lower mold 2 is identical to that of the upper mold 1, and the upper mold 1 and the lower mold 2 are arranged in mirror symmetry. The half-flanged cavities 131 on the upper mold 1 and the lower mold 2 form a flanging cavity, and the half-extrusion convex cavities on the upper mold 1 and the lower mold 2 form an extrusion convex cavity.
[0030] Furthermore, a plurality of sockets 113 are symmetrically provided on both sides of the semicircular grooves of the upper die base 11 and the lower die base and along the central axis direction of the semicircular grooves. The sockets 113 on the upper die base 11 are arranged opposite to the sockets 113 on the lower die base, and a guide column 5 is provided in the sockets 113.
[0031] It can be understood that the setting of the guide column 5 provides a guiding function when the upper mold 1 and the lower mold 2 are closed, thereby improving the closing accuracy of the upper mold 1 and the lower mold 2 and improving the closing efficiency.
[0032] The working mode of the device of the present invention is as follows: the horizontal oil cylinder returns to the original position, the pipe fitting is placed in the semicircular groove of the lower mold 2, the oil cylinders of the upper mold 1 and the lower mold 2 are started to close the mold, and then the horizontal oil cylinder is started to push the flanging and expanding core rod 3 to the raw material to continue to move and push the flanging forming seat 13 until the flanging forming seat 13 and the extrusion convex fixing seat 12 are closed, and then the horizontal oil cylinder returns to the original position, and then the upper mold 1 is opened to take out the workpiece.
[0033] Those skilled in the art should understand that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any 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 device for flanging and convexing pipe fittings, characterized in that: It includes an upper mold, a lower mold and a flanging and expanding core rod, the upper mold is fixed on the vertical cylinder fixing seat of the press, the lower mold is fixed on the lower platform of the press, and is located directly below the upper mold, and an upper semicircular groove extending along its length direction is provided on the lower end surface of the upper mold, and a lower semicircular groove extending along its length direction is provided on the upper end surface of the lower mold. When the upper mold is lowered and closed with the lower mold, the upper semicircular groove and the lower semicircular groove form a pipe accommodating groove, and on the pipe accommodating groove, a flanging cavity is provided in the port close to one end of the flanging and expanding core rod, and an extrusion punch cavity is provided on the side of the flanging cavity away from the flanging and expanding core rod; the flanging and expanding core rod is fixed on the cylinder fixing seat located in the horizontal direction of the press, and the flanging and expanding core rod is coaxially arranged with the upper semicircular groove and the lower semicircular groove.
2. The pipe flanging and convexing device according to claim 1, characterized in that: The upper mold includes an upper mold base, an extrusion convex fixing base and a flanging forming base, and a 7-shaped notch is provided at one end of the upper mold base, extending from its end face along its horizontal axis and along its vertical axis to the opposite end and the lower end face respectively, the extrusion convex fixing base and the flanging forming base are spaced apart in the 7-shaped notch, the extrusion convex fixing base is tightly arranged with the vertical side wall of the 7-shaped notch, and a plurality of springs are connected between the flanging forming base and the extrusion convex fixing base; A semicircular groove section constituting an upper semicircular groove is coaxially provided on the lower end surface of the flanging forming seat, and the semicircular groove section of the flanging forming seat is recessed inwardly in the port at one end of the flanging expanding core rod to form a half-flanging cavity, and the adjacent end ports of the flanging forming seat and the extrusion convex fixing seat are recessed inwardly to form a first sub-extrusion convex cavity and a second sub-extrusion convex cavity. The first sub-extrusion convex cavity and the second sub-extrusion convex cavity are spliced to form a half-extrusion convex cavity when the flanging forming seat and the extrusion convex fixing seat are docked.
3. The pipe flanging and convexing device according to claim 2, characterized in that: The flanging forming seat and the convex extrusion fixing seat are detachably connected to the upper die seat through a plurality of fixing limit screws extending along the axis direction of the upper semicircular groove.
4. The pipe flanging and convexing device according to claim 3, characterized in that: The upper die seat also includes a slider fixing plate, which is slidably connected to the top wall of the 7-shaped notch, and the top end surfaces of the flanging forming seat and the extrusion convex fixing seat are slidably connected to the lower end surface of the slider fixing plate.
5. The pipe flanging and convexing device according to claim 4, characterized in that: A first inverted trapezoidal groove perpendicular to the upper semicircular groove is provided on the top wall of the 7-shaped notch, and a first inverted trapezoidal platform adapted to the inverted trapezoidal groove is provided on the top wall of the slider fixing plate, and the first inverted trapezoidal platform is inserted into the first inverted trapezoidal groove; a plurality of second inverted trapezoidal grooves parallel to the upper semicircular groove are provided on the lower end surface of the slider fixing plate, and a plurality of second inverted trapezoidal platforms and third inverted trapezoidal platforms adapted to the second inverted trapezoidal groove are respectively provided on the upper end surfaces of the flanging forming seat and the extrusion convex fixing seat, and the second inverted trapezoidal platform and the third inverted trapezoidal platform are inserted into the second inverted trapezoidal groove.
6. The pipe flanging and convexing device according to any one of claims 2 to 5, characterized in that: The structure of the lower mold is completely the same as that of the upper mold, and the upper mold and the lower mold are arranged in mirror symmetry.
7. The pipe flanging and convexing device according to claim 6, characterized in that: A plurality of insertion holes are symmetrically provided on both sides of the semicircular groove of the upper die base and the lower die base and along the central axis direction of the semicircular groove. The insertion holes on the upper die base are arranged opposite to the insertion holes on the lower die base, and guide columns are provided in the insertion holes.