High-precision flat round pipe drawing combined die
By setting an adjustment component between the insert brackets, the pulling problem caused by the fixed distance between the insert brackets in the prior art is solved, and the flexible adjustment of the spacing between the insert brackets is realized, which improves the pulling efficiency and forming quality and adapts to the needs of USB TYPE-C shells of different specifications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽亿达塑料管材有限公司
- Filing Date
- 2025-10-31
- Publication Date
- 2026-08-04
AI Technical Summary
In the existing technology, the distance between the insert holders is fixed, which makes it difficult to adapt to the drawing requirements of flat round tubes of different specifications of USB TYPE-C shells. This results in surface wrinkles, local cracks or lateral shaking of the tubes during the drawing process, affecting the forming quality and efficiency.
By setting adjustment components between the insert plates, including worm gear, worm wheel, bevel gear and threaded rod, the spacing between the insert plates can be flexibly adjusted. Rotating the operating lever drives the worm gear and worm wheel to change the distance between the mold cores, adapting to the drawing requirements of flat round tubes of different sizes.
It enables flexible adjustment of the spacing between the insert plates, improves the drawing efficiency, avoids uneven deformation and shaking of the tube during the drawing process, and ensures the forming quality and precision of the flat round tube.
Smart Images
Figure CN224586639U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connector manufacturing technology, specifically a high-precision flat round tube drawing assembly mold. Background Technology
[0002] USB Type-C is a USB interface form factor standard. The USB Type-C shell is mainly made by a "round-to-differential" forming method, which involves repeatedly pulling a round tube to form a flattened round irregular structure to meet the usage requirements of USB Type-C.
[0003] A search revealed, for example, a high-precision flat round tube drawing assembly mold disclosed in Chinese Utility Model Patent Publication No. CN218486888U. This patent features an insert plate frame, which is fixed in a slot by inserting blocks. The insert plate frame has a second mounting hole in its center, and a mold core is also placed within this second mounting hole. The mold core has drawing holes, and the drawing holes of multiple mold cores are concentrically arranged. This utility model enables one-time drawing and forming, resulting in high efficiency and significantly reduced workload.
[0004] However, in this device, the fixed distance between the insert plates is difficult to adjust, making it difficult to adapt to the drawing requirements of flat round tubes for USB TYPE-C shells of different specifications. When flat round tubes with a large size range need to be produced, such as drawing from large-diameter round tubes to thin-walled, narrow-width flat round tubes, the fixed spacing cannot provide sufficient deformation transition space for the tube, which can easily lead to surface wrinkles and local cracks due to excessive deformation during the drawing process, increasing the defect rate of the tube. When precision small-sized flat round tubes need to be produced, such as tubes for ultra-thin USB TYPE-C shells, the fixed spacing will cause the suspended section of the tube between adjacent die cores to be too long, which can easily cause lateral swaying during drawing, resulting in uneven wall thickness and dimensional deviations of the flat round tube. Therefore, a high-precision flat round tube drawing combination die is proposed to solve the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a high-precision flat round tube drawing assembly mold that allows for flexible adjustment of the spacing between the insert plates, thereby improving drawing efficiency.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-precision flat round tube drawing combination mold, including a base plate, a support groove fixedly installed on the top of the base plate, a guide ring fixedly installed on the front surface of the support groove, a number of insert plate frames arranged inside the support groove, an adjustment component arranged inside the insert plate frame, a mold core arranged on the front side of the insert plate frame, and a trumpet-shaped deformation zone and a drawing hole opened inside the mold core; The adjusting assembly includes a worm gear rotatably mounted inside the insert plate frame. An operating lever is fixedly mounted on the front side of the worm gear. A worm wheel meshes with the right side of the worm gear. A first rotating rod is fixedly mounted in the middle of the worm wheel. A driving bevel gear is fixedly mounted at the end of the first rotating rod. Driven bevel gears mesh with both sides of the driving bevel gear. A second rotating rod is fixedly mounted in the middle of each of the two driven bevel gears. Threaded rods are fixedly mounted on opposite sides of each of the two second rotating rods. Moving plates are threaded onto the surfaces of each of the two threaded rods. Locking rods are fixedly mounted on opposite sides of each of the two moving plates. Several through-limiting holes are opened on the left and right side walls of the support groove.
[0007] Furthermore, a stop and limit plate is fixedly installed on the top of the base plate, and L-shaped mounting brackets are fixedly installed on both the left and right sides of the bracket groove. The L-shaped mounting brackets are fixed to the base plate by bolts.
[0008] Furthermore, the operating lever extends through the insert plate frame to the front side of the insert plate frame, and the first rotating rod is rotatably installed inside the insert plate frame.
[0009] Furthermore, the two threaded rods are respectively rotatably installed on the left and right walls of the insert plate frame, and the bottom wall of the insert plate frame is provided with two guide rails, and the moving plate is slidably installed with the guide rails.
[0010] Furthermore, the inlet end of the pull-out hole is provided with a trumpet-shaped deformation zone, the inner wall of the insert plate frame is provided with a guide hole, and the interior of the insert plate frame is provided with an annular protective cover, which is located outside the guide hole.
[0011] Furthermore, connecting plates are fixedly installed at the top and bottom of the mold core, and insert rods are movably connected inside the two connecting plates. Slots are opened on the outer wall of the insert plate frame, and the insert rods are adapted to the slots. A spring is fixedly installed on the surface of the insert rods, with one end of the spring fixedly connected to the surface of the insert rods and the other end fixedly connected to the surface of the connecting plates.
[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects: This high-precision flat tube drawing assembly, designed to adapt to different flat tube drawing requirements, allows for adjustment of the insert plate spacing via an adjustable component. Rotating the operating lever drives the first rotating rod and the driving bevel gear via a worm gear and worm wheel. The driving bevel gear meshes with the driven bevel gear, causing the second rotating rod and two threaded rods to rotate. This, in turn, allows the moving plate to disengage the locking rod from the limiting hole. After unlocking, the insert plate can move flexibly within the support groove, thus changing the distance between the die cores. When drawing "large span" flat tubes, increasing the insert plate spacing increases the die core spacing, providing ample deformation transition space for the tube. When drawing "small precision" flat tubes, decreasing the insert plate spacing shortens the tube's suspended section, improving drawing efficiency. Attached Figure Description
[0013] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a side sectional view of the insert plate holder of this utility model; Figure 3 This is a schematic diagram of the internal structure of the plug-in bracket of this utility model; Figure 4 This is a front view schematic diagram of the plug-in bracket of this utility model.
[0014] In the diagram: 1. Base plate; 2. Support groove; 3. Stop and limit plate; 4. L-shaped mounting bracket; 5. Guide ring; 6. Insert plate bracket; 7. Adjustment assembly; 701. Worm gear; 702. Operating lever; 703. Worm wheel; 704. First rotating rod; 705. Driving bevel gear; 706. Driven bevel gear; 707. Second rotating rod; 708. Threaded rod; 709. Moving plate; 710. Locking rod; 711. Through the limit hole; 8. Mold core; 9. Guide hole; 10. Connecting plate; 11. Insert rod; 12. Trumpet-shaped deformation zone; 13. Pull-out hole; 14. Annular protective cover; 15. Spring. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-4A high-precision flat round tube drawing combination mold in this embodiment includes a base plate 1, a support groove 2 fixedly installed on the top of the base plate 1, a guide ring 5 fixedly installed on the front surface of the support groove 2, a number of insert plate frames 6 are arranged inside the support groove 2, an adjustment component 7 is arranged inside the insert plate frame 6, a mold core 8 is arranged on the front side of the insert plate frame 6, and a trumpet-shaped deformation area 12 and a drawing hole 13 are opened inside the mold core 8. The adjusting assembly 7 includes a worm gear 701, which is rotatably mounted inside the insert plate frame 6. An operating lever 702 is fixedly mounted on the front side of the worm gear 701. A worm wheel 703 meshes with the right side of the worm gear 701. A first rotating rod 704 is fixedly mounted in the middle of the worm wheel 703. A driving bevel gear 705 is fixedly mounted at the end of the first rotating rod 704. Driven bevel gears 706 mesh with both sides of the driving bevel gear 705. A second rotating rod 707 is fixedly mounted in the middle of each of the two driven bevel gears 706. Threaded rods 708 are fixedly mounted on opposite sides of each of the two second rotating rods 707. Moving plates 709 are threaded onto the surfaces of both threaded rods 708. Locking rods 710 are fixedly mounted on opposite sides of each of the two moving plates 709. Several through-limiting holes 711 are opened on the left and right side walls of the bracket groove 2.
[0017] like Figure 1 As shown, the functions of the stop limit plate 3 and the L-shaped mounting bracket 4 are the same as those in the comparative document, so they will not be described in detail here.
[0018] like Figure 1 As shown, by setting up the operating lever 702, the operator can easily rotate the worm gear 701 by rotating the operating lever 702, thereby driving a series of components to rotate.
[0019] like Figure 3 As shown, by setting a guide rail, the guide rail and the limiting plate are slidably installed. This setting can restrict the rotational freedom of the limiting plate, so that when the threaded rod 708 rotates, the limiting plate can move linearly with the rotation of the threaded rod 708.
[0020] like Figure 2As shown, by setting up a trumpet-shaped deformation zone 12 and a drawing hole 13, the trumpet-shaped deformation zone 12 has a tapered trumpet shape, and its inlet port diameter is larger than the initial diameter of the tube. This can guide the pre-treated tube (with flattened ends) to quickly align with the drawing hole 13, avoiding tube jamming caused by the small diameter of the drawing hole 13 and difficulty in alignment. At the same time, the drawing holes 13 of multiple mold cores 8 are concentrically set. After the tube passes through the trumpet-shaped deformation zone 12 of the first mold core 8, it can smoothly enter the drawing hole 13 of the subsequent mold core 8 along the concentric axis without repeatedly adjusting the position of the tube. This achieves "one-time tube insertion for one roll of tube", perfectly matching the design goal of "one-time drawing and forming" of the mold. It has the same effect as the trumpet-shaped deformation zone 12 and drawing hole 13 in the comparative document, so it will not be elaborated further.
[0021] like Figure 2 As shown, by setting up a connecting plate 10, a plug rod 11, a slot and a spring 15, the spring 15 resets and drives the plug rod 11 to be inserted into the slot in the insert plate frame 6, thereby realizing the insertion and fixing of the connecting plate 10 and the insert plate frame 6, thereby realizing the fixing of the mold core 8 and the insert plate frame 6.
[0022] like Figure 2 As shown, the guide hole 9 facilitates guidance, and the annular protective cover 14 prevents the gear from scratching the passing pipe.
[0023] When implementing this procedure, please follow these steps: 1) When it is necessary to adjust the distance between different insert plate holders 6 according to the flat round tube pulling requirements, first rotate the operating rod 702 of the adjusting component 7; the operating rod 702 drives the worm gear 701 to rotate synchronously, and the worm gear 701 drives the first rotating rod 704 to rotate through the meshing transmission with the worm wheel 703; the first rotating rod 704 further drives the active bevel gear 705 to rotate, and the active bevel gear 705 meshes with the driven bevel gear 706, thereby driving the second rotating rod 707 to rotate; the second rotating rod 707 drives the two threaded rods 708 to rotate synchronously, and the two threaded rods 708 drive the two moving plates 709 that cooperate with them to move relative to each other, and finally make the two locking rods 710 disengage from the corresponding limiting holes, releasing the fixed restriction of the insert plate holder 6 inside the bracket groove 2; 2) After the locking rod 710 disengages from the limiting hole and the insert plate frame 6 is unlocked, the insert plate frame 6 is flexibly moved inside the bracket groove 2 according to the specifications of the flat round tube to be drawn, and the relative distance between different insert plate frames 6 is adjusted to prepare for the subsequent die core 8 spacing adaptation, and to ensure that the spacing adjustment meets the requirements of the current drawing process for the position of the die core 8. 3) When drawing flat round tubes with "large span" (such as drawing from a large diameter round tube into a thin-walled narrow flat round tube), the distance between the two insert plates 6 is increased by moving the insert plate frame 6; since the insert plate frame 6 is equipped with the mold core 8, the increase in the distance between the insert plate frame 6 can simultaneously increase the distance between the two mold cores 8, providing more "deformation transition space" for the tube during the drawing process, and avoiding problems such as surface wrinkles and local cracks caused by excessive deformation of the tube; 4) Finally, when drawing "small-sized precision" flat round tubes (such as tubes for ultra-thin USB TYPE-C housings), the distance between adjacent insert plates 6 is reduced by moving the insert plate frame 6, thereby reducing the distance between adjacent die cores 8. Reducing the distance can shorten the "suspended section length" of the tube between adjacent die cores 8, reduce the lateral sway of the tube during drawing, ensure uniform wall thickness and accurate external dimensions of the flat round tube, and improve the overall drawing efficiency to meet the forming requirements of precision flat round tubes.
[0024] In summary, this high-precision flat tube drawing assembly mold, to adapt to different flat tube drawing requirements, allows for adjustment of the spacing of the insert plate holders 6 via the adjusting component 7. Rotating the operating rod 702 drives the first rotating rod 704 and the driving bevel gear 705 to rotate via the worm gear 701 and worm wheel 703. The driving bevel gear 705 meshes with the driven bevel gear 706, causing the second rotating rod 707 and the two threaded rods 708 to rotate. This, in turn, allows the moving plate 709 to disengage the locking rod 710 from the limiting hole. After unlocking, the insert plate holders 6 can move flexibly within the bracket groove 2, thereby changing the distance between the mold cores 8. When drawing "large span" flat tubes, the spacing of the insert plate holders 6 is increased to enlarge the spacing of the mold cores 8, providing sufficient deformation transition space for the tube. When drawing "small precision" flat tubes, the spacing of the insert plate holders 6 is reduced to shorten the suspended section of the tube, improving drawing efficiency.
[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-precision flat round tube drawing combined die comprising a bottom plate (1), characterized in that: The top of the base plate (1) is fixedly installed with a support groove (2), and a guide ring (5) is fixedly installed on the front surface of the support groove (2). The support groove (2) is provided with a number of insert plate frames (6), and an adjustment component (7) is provided inside the insert plate frame (6). A mold core (8) is provided on the front side of the insert plate frame (6), and a trumpet-shaped deformation area (12) and a pull-out hole (13) are opened inside the mold core (8). The adjusting assembly (7) includes a worm gear (701), which is rotatably mounted inside the insert plate frame (6). An operating lever (702) is fixedly mounted on the front side of the worm gear (701). A worm wheel (703) meshes with the right side of the worm gear (701). A first rotating rod (704) is fixedly mounted in the middle of the worm wheel (703). A driving bevel gear (705) is fixedly mounted at the end of the first rotating rod (704). Driven bevel gears (705) mesh with both sides of the driving bevel gear (705). The gear (706) has a second rotating rod (707) fixedly installed in the middle of the two driven bevel gears (706). The two second rotating rods (707) have threaded rods (708) fixedly installed on opposite sides. The surfaces of the two threaded rods (708) are threaded with moving plates (709). The opposite sides of the two moving plates (709) are fixedly installed with locking rods (710). The left and right side walls of the bracket groove (2) are provided with a number of through limiting holes (711).
2. The high-precision flat round tube drawing combined die according to claim 1, characterized in that: A stop and limit plate (3) is fixedly installed on the top of the base plate (1), and L-shaped mounting brackets (4) are fixedly installed on both the left and right sides of the bracket groove (2). The L-shaped mounting brackets (4) are fixed to the base plate (1) by bolts.
3. The high-precision combined drawing die for a flat oval tube according to claim 1, characterized in that: The operating lever (702) extends through the insert plate frame (6) to the front side of the insert plate frame (6), and the first rotating rod (704) is rotatably installed inside the insert plate frame (6).
4. The high-precision combined drawing die for a flat oval tube according to claim 1, characterized in that: The two threaded rods (708) are respectively rotatably installed on the left and right walls of the insert plate frame (6). The bottom wall of the insert plate frame (6) is provided with two guide rails, and the movable plate (709) is slidably installed with the guide rails.
5. The high-precision combined drawing die for a flat oval tube according to claim 1, characterized in that: The pull hole (13) has a flared deformation zone (12) at its inlet end. The inner wall of the insert plate frame (6) has a guide hole (9). The insert plate frame (6) has an annular protective cover (14) inside. The annular protective cover (14) is located outside the guide hole (9).
6. The high-precision combined drawing die for a flat oval tube according to claim 1, characterized in that: The top and bottom of the mold core (8) are fixedly installed with connecting plates (10), and the interior of the two connecting plates (10) is movably connected with insert rods (11). The outer wall of the insert plate frame (6) is provided with slots, and the insert rods (11) are adapted to the slots. A spring (15) is fixedly installed on the surface of the insert rods (11). One end of the spring (15) is fixedly connected to the surface of the insert rods (11), and the other end is fixedly connected to the surface of the connecting plates (10).