A lifting pipe forming mold and method

Abstract

The present invention discloses a lifting tube forming mold and method. The lifting tube forming mold comprises an upper mold and a lower mold. The lower mold is provided with a support block and two sliders. The two sliders are provided with a first forming block, a second forming block and a third forming block respectively. Push blocks are provided at the corresponding sliders of the upper mold respectively. Each push block is used to push the slider on the same side to move horizontally. During the processing, the lifting tube sequentially forms a first annular protrusion, rivets with a rivet to form a second annular protrusion, and forms a third annular protrusion, so that the rivet is closely connected to the lifting tube and the forming efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a lifting tube forming mold and method. Background Art

[0002] The lifting tube is an important component in the car seat, and support plates are provided at both ends of the lifting tube. The connection stability between the lifting tube and the support plate affects the stability of the seat adjustment. In the prior art (such as the patent with application publication number CN 105235554A), the connection between the synchronous drive rod 2 (i.e., the lifting tube) and the connecting rod 1 (equivalent to the support plate) is complicated and prone to failure in actual use. Therefore, it is necessary to propose a new lifting tube forming mold and method, which can improve the connection stability between the lifting tube and the support plate and improve the processing efficiency.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a riser forming die and method, which can improve the connection stability between the riser and the support plate and improve the processing efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lifting tube forming mold comprises an upper mold and a lower mold, wherein the lower mold is provided with a support block and two sliders, and the two sliders are provided with a first forming block, a second forming block and a third forming block respectively; each of the first forming block, the second forming block and the third forming block comprises an inner forming block and an outer tube which are coaxially arranged, and each inner forming block comprises a section of a cylinder and a boss arranged at the front section of the cylinder, and the front end of the boss is conical; a plurality of protrusions are respectively arranged at the front end of the outer tube of each second forming block; push blocks are respectively arranged at the corresponding sliders of the upper mold, and each push block is respectively used to push the slider on the same side to move horizontally.

[0007] Furthermore, in the lifting tube forming mold, the outer side of each slider is an inclined surface, and the inner side of each push block is an inclined surface; the inner side of each push block has the same inclination angle as the outer side of the slider on the same side.

[0008] Furthermore, in the rising tube forming mold, a plurality of plug blocks are arranged in the middle of the bottom of the upper mold, and the plug blocks are used to be inserted into the lower mold.

[0009] Furthermore, in the rising tube forming mold, a plurality of pressing blocks are arranged at the bottom of the upper mold, and the pressing blocks are distributed on both sides of the insert block.

[0010] Furthermore, in the lifting tube forming mold, each slider is connected to the lower mold through a linear slide rail.

[0011] Furthermore, in the rising tube forming mold, a transport device for transporting the rising tube is provided on the lower mold.

[0012] The present invention accordingly provides a method for forming a riser tube, which is different from the prior art in that the riser tube forming mold is used for forming, and the method comprises the following steps:

[0013] (1) Place the lifting tube to be processed on the lower die, with both ends of the lifting tube facing the first forming block on the same side;

[0014] (2) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two first forming blocks squeeze out the first annular protrusion at one end of the lifting tube respectively; the upper die rises;

[0015] (3) Move the position of the lifting tube so that both ends of the lifting tube are opposite to the second forming block on the same side, and insert a rivet to be riveted into each of the two ends of the lifting tube;

[0016] (4) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two second forming blocks respectively rivet the rivet and the lifting tube on the same side to form a second annular protrusion; the upper die rises;

[0017] (5) moving the position of the lifting tube so that both ends of the lifting tube are aligned with the third forming block on the same side;

[0018] (6) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two third forming blocks squeeze out a third annular protrusion at one end of the lifting tube respectively; the upper die rises.

[0019] Beneficial effects: The present invention provides a lifting tube forming die and method. Compared with the prior art, the lifting tube forming die of the present invention, by providing components such as a slider, a push block, a first forming block, a second forming block and a third forming block, realizes that during the processing, the lifting tube sequentially forms a first annular protrusion, rivets with a rivet to form a second annular protrusion, and forms a third annular protrusion, so that the rivet and the lifting tube are tightly connected and will not loosen. In addition, since three lifting tubes are always provided on the lower die during each extrusion, the lifting tube forming efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the riser forming mold provided by the present invention.

[0021] Figure 2 This is a front view of the upper mold in the riser forming mold provided by the present invention.

[0022] Figure 3 A three-dimensional diagram of the upper mold in the riser forming mold provided by the present invention.

[0023] Figure 4 This is a three-dimensional diagram of the lower mold in the riser forming mold provided by the present invention.

[0024] Figure 5 for Figure 4 A partial enlarged view of the S1 region in the middle.

[0025] Figure 6 for Figure 4 A local enlarged view of the S2 region.

[0026] Figure 7 for Figure 4 A local enlarged view of the S3 region.

[0027] Figure 8 A schematic structural diagram of a second forming block in the riser forming die provided by the present invention.

[0028] Fig. 9 Schematic diagram of the connection holes and recesses of the rivet. DETAILED DESCRIPTION

[0029] The present invention provides a riser tube forming mold and method. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] See also Figures 1 to 9 The present invention provides a lifting tube forming mold. Figure 8 It is a schematic diagram of the structure of the second forming block; the first forming block and the third forming block are not provided with protrusions, and the schematic diagrams of the structures of the first forming block and the third forming block are not drawn separately.

[0031] A lifting tube forming mold includes an upper mold 1 and a lower mold 2. The lower mold is provided with a support block 20 and two sliders 21. The two sliders are provided with a first forming block 31, a second forming block 32 and a third forming block 33 respectively. Each of the first forming block, the second forming block and the third forming block includes an inner forming block 302 and an outer tube 301 which are coaxially arranged. Each inner forming block 302 includes a section of a cylinder 3021 and a boss 3022 arranged at the front section of the cylinder. The front end of the boss is conical 3023. The front end of the outer tube of each second forming block is provided with a plurality of protrusions 3011 respectively. Push blocks 11 are provided at the corresponding sliders of the upper mold respectively. Each push block is used to push the slider on the same side to move horizontally. The push blocks on the same side can be provided in a split type (such as Figure 3 As shown), it can also be set as an integral type.

[0032] The above-mentioned support block is used to support three lifting pipes (numbered 91, 92 and 93) to form three workstations, that is, the first workstation is corresponding to the two first forming blocks, the second workstation is corresponding to the two second forming blocks, and the third workstation is corresponding to the two third forming blocks. The lifting pipe at the first workstation is extruded to form a first annular protrusion 901, the lifting pipe at the second workstation is extruded and riveted with the rivet to form a second annular protrusion 902, and the lifting pipe at the third workstation is extruded to form a third annular protrusion 903.

[0033] like Figure 8 As shown, two protrusions 3011 are schematically drawn in the accompanying drawings, but the present invention is not limited thereto. In practical applications, the number of each protrusion is equal to and corresponds to the notches 801 in the connection hole 80 of the rivet 8 (i.e., the support plate) to be riveted; when the two second sliders move toward each other, the wall of the lifting tube is squeezed, and the part of the second annular protrusion corresponding to the protrusion is squeezed into the notch of the connection hole of the rivet 8 to meet the torque requirement after the riveting.

[0034] Furthermore, the outer side of each slider 21 is an inclined surface, and the inner side of each push block 11 is an inclined surface; the inner side of each push block has the same inclination angle as the outer side of the slider on the same side. This arrangement is convenient for practical use. When the upper mold is pressed down, a horizontal component force is generated on the slider, so that the two sliders move toward each other, thereby squeezing the lifting tube. In actual application, a spring is respectively provided at each slider in the lower mold, so that the two sliders are automatically reset under the action of elastic force after the upper mold rises.

[0035] Furthermore, a plurality of insert blocks 13 are arranged in the middle of the bottom of the upper die, and the insert blocks are used to be inserted into the lower die. The above-mentioned insert blocks are inserted into the middle of the lower die to resist the force of the two sides of the die during the tube extrusion molding, thereby improving the molding quality.

[0036] Furthermore, a plurality of press blocks 12 are provided at the bottom of the upper die, and the press blocks are distributed on both sides of the insert block. The press blocks are used to press the lifting tube during the extrusion process to prevent the lifting tube from shaking. In practical applications, semicircular grooves are provided on the top of the support block and the bottom of the press block, respectively, so that the lifting tube can pass through the grooves. The ends of the press block and the support block are flush ( Figures 5 and 6 The pressing block is not shown in the figure) to facilitate the formation of the first annular protrusion.

[0037] Furthermore, each slider is connected to the lower die through a linear slide rail (not visible in the figure). This arrangement enables the slider to be slidably connected relative to the lower die, and the linear slide rail guides the movement of the slider.

[0038] Furthermore, a handling device 3 for handling the lifting tube is provided on the lower mold. The handling device is used to move the lifting tube of the previous station to the next station. There are many ways to implement the handling device, which are not limited here. In actual use, if the handling device is not provided, the lifting tube of the previous station can also be moved manually to the next station.

[0039] In actual use, the above-mentioned lifting tube mold is set on a press machine, and the lifting tube molding mainly includes the following steps:

[0040] (1) Place the lifting tube to be processed on the lower die, with both ends of the lifting tube facing the first forming block on the same side;

[0041] (2) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two first forming blocks squeeze out the first annular protrusion at one end of the lifting tube respectively; the upper die rises;

[0042] (3) Move the position of the lifting tube so that both ends of the lifting tube are opposite to the second forming block on the same side, and insert a rivet to be riveted into each of the two ends of the lifting tube;

[0043] (4) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two second forming blocks respectively rivet the rivet and the lifting tube on the same side to form a second annular protrusion; the upper die rises;

[0044] (5) moving the position of the lifting tube so that both ends of the lifting tube are aligned with the third forming block on the same side;

[0045] (6) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two third forming blocks squeeze out a third annular protrusion at one end of the lifting tube respectively; the upper die rises.

[0046] During actual processing, both ends of the lifting tube are inserted into the outer tube, and the inner forming block boss is inserted into the end of the lifting tube to play a guiding role. The step at the inner forming block boss abuts against the end of the lifting tube, and the lifting tube is squeezed when the two sliders move toward each other.

[0047] It can be seen that the riser pipe before processing is a straight pipe, which can be formed through three extrusions, thereby improving the forming efficiency of the riser pipe.

[0048] It should be noted that in actual applications, three lifting tubes are provided on the lower die each time extrusion is performed, and each time extrusion is performed, the lifting tubes at the previous station are moved to the next station, thereby further improving the lifting tube forming efficiency.

[0049] Through the above analysis, it can be seen that compared with the prior art, in the lifting tube forming mold of the present invention, by setting components such as a slider, a push block, a first forming block, a second forming block and a third forming block, the lifting tube can sequentially form a first annular protrusion, rivet with a rivet to form a second annular protrusion, and form a third annular protrusion during the processing, so that the rivet and the lifting tube are tightly connected and will not loosen. In addition, since three lifting tubes are always arranged on the lower die during each extrusion, the lifting tube forming efficiency is further improved.

[0050] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A lifting tube forming mold, comprising an upper mold and a lower mold, characterized in that: The lower mold is provided with a support block and two sliders, and the two sliders are respectively provided with a first forming block, a second forming block and a third forming block; each of the first forming block, the second forming block and the third forming block includes an inner forming block and an outer tube arranged coaxially, and each inner forming block includes a section of a cylinder, a boss arranged at the front section of the cylinder, and the front end of the boss is conical; the front end of the outer tube of each second forming block is respectively provided with a plurality of protrusions; the upper mold is respectively provided with push blocks at the corresponding sliders, and each push block is respectively used to push the slider on the same side horizontally movement; a plurality of plug blocks are arranged in the middle of the bottom of the upper die, and the plug blocks are used to be inserted into the lower die; a plurality of pressing blocks are arranged at the bottom of the upper die, and the pressing blocks are distributed on both sides of the plug blocks; a semicircular groove is arranged on the top of the support block and the bottom of the pressing block, and the ends of the pressing block and the support block are flush; the number of each protrusion is equal to and corresponds to the notch in the connecting hole of the rivet to be riveted; the outer side of each slider is an inclined surface, and the inner side of each push block is an inclined surface; the inner side of each push block has the same inclination angle as the outer side of the slider on the same side.

2. The riser forming mold according to claim 1, characterized in that: Each slide block is connected to the lower die through a linear slide rail.

3. The riser forming mold according to claim 1, characterized in that: The lower mold is provided with a transport device for transporting the lifting tube.

4. A method for forming a riser, characterized in that: The molding process using the riser forming mold according to any one of claims 1 to 3 comprises the following steps: (1) Place the lifting tube to be processed on the lower die, with both ends of the lifting tube facing the first forming block on the same side; (2) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two first forming blocks squeeze out the first annular protrusion at one end of the lifting tube respectively; the upper die rises; (3) Move the position of the lifting tube so that both ends of the lifting tube are opposite to the second forming block on the same side, and insert a rivet to be riveted into each of the two ends of the lifting tube; (4) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two second forming blocks respectively rivet the rivet and the lifting tube on the same side to form a second annular protrusion; the upper die rises; (5) moving the position of the lifting tube so that both ends of the lifting tube are aligned with the third forming block on the same side; (6) The upper die is pressed downward, and the two slide blocks of the lower die move toward each other. The two third forming blocks squeeze out a third annular protrusion at one end of the lifting tube respectively; the upper die rises.

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