Extrusion die structure capable of shortening transverse welding seam
By designing the bridge position and welding chamber structure in the mold, metal flow is improved and the dead zone of the welding chamber is reduced, the problem of poor quality of the transverse weld is solved, and the welding quality and yield rate are improved.
Patent Information
- Application Number
- CN202411551661.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-02-11
AI Technical Summary
During the extrusion process of aluminum profiles, the transverse welds contain a large amount of impurities, segregates and oxides, resulting in poor welding quality, affecting the yield rate, and poor welds are difficult to detect in non-destructive testing, which easily leads to product hidden dangers.
By designing the bridge position, welding chamber and other structures of the mold, the metal flow on the sides of the welding chamber and below the bridge is improved, and the formation of dead zones of the welding chamber is reduced. Specific measures include the diversion bridge being sharp-angled and the side walls of the welding chamber are inclined. , the bottom is designed as a slope and uses a large arc transition.
The quality of the blank welding is improved, the metal flow rate is improved, the flow out of the old blank at the bottom of the bridge is accelerated, the defects of the transverse welding are effectively reduced, and the yield rate is improved.
Smart Images
Figure CN119406957A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of die processing, and in particular to an extrusion die structure for shortening a transverse weld. Background Art
[0002] When aluminum extrusion uses a splitter combination die to produce hollow profiles, after the billet is extruded and the excess is cut, there will be residual material in the splitter hole and welding chamber of the splitter die. When the next billet is extruded, the front end of the billet will contact the residual material left in the mold by the previous billet. As the extrusion progresses, the contact surface is welded under the action of high temperature and high pressure, and flows out of the mold to form a transverse weld. Unlike the longitudinal weld, the transverse weld usually contains a large amount of impurities, segregants and oxides of the aluminum rod, so the welding quality is poor. In actual production, the part containing the transverse weld will be discarded, which seriously affects the yield rate. The location where cracks appear in aluminum alloy products with welds often starts from the weld, and there are usually no holes or defects in the bad welds, which are difficult to be found in non-destructive testing, which is easy to leave hidden dangers for the product. Summary of the invention
[0003] (1) Technical issues to be solved
[0004] The present invention is a die for shortening the transverse welding of the head, and through the corresponding design of the bridge position and the welding chamber of the die, the metal flow on the side of the welding chamber and below the bridge is improved, and the formation of the dead zone of the welding chamber is reduced, which is conducive to shortening the defects of transverse welding.
[0005] (2) Technical solution
[0006] In order to solve the above technical problems, the present invention provides an extrusion die structure for shortening the transverse weld, comprising a die, a diversion hole, a diversion bridge, a welding chamber, a die core, and an empty knife edge;
[0007] The mold includes an upper mold and a lower mold that cooperate with each other; the upper mold includes an upper mold feed end and an upper mold discharge end; the upper mold feed end is provided with the diverter hole and the diverter bridge extending to the upper mold discharge end; the diverter bridge includes a diverter bridge feed end located at the upper mold feed end, a diverter bridge main body located in the middle of the upper mold, and a diverter bridge discharge end located at the upper mold discharge end; the upper mold discharge end and the lower mold form the welding chamber; the side wall of the welding chamber located below the diverter hole is set as the first side wall; the side wall of the welding chamber located below the diverter bridge is the second side wall; the mold core is provided at the lower middle of the bottom of the upper mold; the lower mold is provided with the empty knife edge that cooperates with the mold core in the middle.
[0008] Preferably, the bridge deck of the feed end of the diverter bridge is sunken relative to the feed end of the upper mold.
[0009] Preferably, the discharging end of the diverter bridge forms a pointed shape, and the angle of the discharging end of the diverter bridge is 35°-60°.
[0010] Preferably, the first side wall and the second side wall at both ends of the welding chamber are inclined; and the first side wall and the second side wall form an angle of 45°-55° with the bottom of the welding chamber respectively.
[0011] Preferably, the first side wall and the second side wall are transitioned to the bottom of the welding chamber using a first transition arc and a second transition arc respectively.
[0012] Preferably, the second transition arc is smaller than the first transition arc.
[0013] Preferably, a lower die feed end is arranged above the welding chamber; and a diverter bridge pier is arranged on the end surface of the lower die feed end.
[0014] Preferably, the upper mold and the lower mold are provided with positioning holes.
[0015] Preferably, the main body of the upper mold is convex; the main body of the lower mold is concave; when the upper mold and the lower mold are closed, the bottom of the upper mold is stuck in the concave interior of the main body of the lower mold.
[0016] Preferably, the mold core comprises a mold core head and a mold core neck; the mold core head is stuck inside the empty knife edge when the mold is closed, and the mold core neck is located inside the welding chamber when the mold is closed.
[0017] (3) Beneficial effects
[0018] The present invention is a die for shortening the transverse welding of the head, and through the corresponding design of the bridge position and the welding chamber of the die, the metal flow on the side of the welding chamber and below the bridge is improved, and the formation of the dead zone of the welding chamber is reduced, which is conducive to shortening the defects of transverse welding.
[0019] 1. The present invention further improves the welding quality of the blanks by making the diverter bridge into a sharp angle and the angle of which is 35°-60°, and at the same time improves the metal flow speed and speeds up the outflow of the old blanks at the bottom of the bridge.
[0020] 2. The present invention fully ensures the strength of the diverter bridge and the deflection of the mold core by sinking the bridge deck of the diverter bridge relative to the feed end of the upper mold; at the same time, the bridge deck is sunk while ensuring the extrusion strength, and the upper mold is thinned, so that the mold has sufficient welding height while reducing the extrusion pressure.
[0021] 3. The present invention reduces the amount of old billet aluminum in the welding chamber structure and the amount of non-flowing metal in the dead zone by designing the bottom of the welding chamber into a slope with a slope of 45-55 degrees and adopting a large arc transition between the slope and the bottom of the welding chamber.
[0022] 4. The present invention shortens the transverse welding of the head of the extruded profile, further improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the structure of an extrusion die structure for shortening a transverse weld seam proposed by the present invention;
[0024] Figure 2 For the present invention Figure 1 A front view of
[0025] Figure 3 In the present invention, Figure 2 Partial cross-sectional view along the AA axis;
[0026] Figure 4 For the present invention Figure 3 Stereoscopic image of
[0027] Figure 5 For the present invention Figure 4 Cross-section of the diversion bridge at B in the middle;
[0028] Figure 6 It is a structural schematic diagram of the welding chamber in the present invention;
[0029] Figure markings: 1-mold, 11-upper mold, 111-upper mold feed end, 112-upper mold discharge end, 12-lower mold, 121-lower mold feed end, 2-diverter hole, 3-diverter bridge, 31-diverter bridge feed end, 32-diverter bridge main body, 33-diverter bridge discharge end, 4-welding chamber, 5-first side wall, 6-second side wall, 7-core, 71-core head, 72-core neck, 8-empty blade, 9-diverter bridge pier, 10-positioning hole, 51-first transition arc, 61-second transition arc. DETAILED DESCRIPTION
[0030] The present invention is further described in conjunction with the accompanying drawings and embodiments.
[0031] like Figures 1 to 6 As shown, an extrusion die structure for shortening a transverse weld seam according to the present invention comprises a die 1, a diverter hole 2, a diverter bridge 3, a welding chamber 4, a die core 7, and an empty knife edge 8;
[0032] The mold 1 includes an upper mold 11 and a lower mold 12 that cooperate with each other; the upper mold 11 includes an upper mold feed end 111 and an upper mold discharge end 112; the upper mold feed end 111 is provided with the diverter hole 2 and the diverter bridge 3 extending to the upper mold discharge end 112; the diverter bridge 3 includes a diverter bridge feed end 31 located at the upper mold feed end 111, a diverter bridge main body 32 located in the middle of the upper mold 11, and a diverter bridge discharge end 33 located at the upper mold discharge end 112; the upper mold discharge end 112 and the lower mold 12 form the welding chamber 4; the side wall of the welding chamber 4 located below the diverter hole 2 is set as the first side wall 5; the side wall of the welding chamber 4 located below the diverter bridge 3 is the second side wall 6; the upper mold 11 is provided with the mold core 7 in the lower middle of the bottom; the lower mold 12 is provided with the empty knife edge 8 that cooperates with the mold core 7 in the middle.
[0033] The bridge surface of the feed end 31 of the diverter bridge is sunken relative to the feed end 111 of the upper mold, which can effectively reduce the pressure of the mold 1 and make the size more stable.
[0034] The discharging end 33 of the diverter bridge is formed into a sharp angle shape, and the angle of the discharging end of the diverter bridge is 35°-60°. The product precision requires a high angle and the upper limit can be taken; the design of the diverter bridge 3 improves the dead zone formed by the blocking of the diverter bridge 3 in the welding chamber 422, thereby reducing the dead zone. Compared with the planar diverter bridge 3, the metal at the bottom of the upper mold 11 and the dead zone on both sides is less.
[0035] The first side wall 5 and the second side wall 6 at both ends of the welding chamber 4 are inclined; and the first side wall 5 and the second side wall 6 form an angle of 45°-55° with the bottom of the welding chamber 4 respectively.
[0036] The first side wall 5 and the second side wall 6 are transitioned to the bottom of the welding chamber 4 by using a first transition arc 51 and a second transition arc 61 respectively.
[0037] The second transition arc 61 is smaller than the first transition arc 51. The structure of the welding chamber 4 has almost no dead zone, which speeds up the outflow of the old blank and effectively reduces the defects of transverse welding.
[0038] The upper part of the welding chamber 4 is provided with a lower die feed end 121; the end surface of the lower die feed end 121 is provided with a diverter bridge pier 9. When the mold is closed, the bottom of the diverter bridge 3 abuts against the diverter bridge pier 9 to prevent the metal from flowing out.
[0039] The upper mold 11 and the lower mold 12 are provided with positioning holes 10; during the process of closing the upper and lower molds, an external latch can be inserted into the positioning hole 10 to connect the upper and lower molds together, while also limiting the closing orientation.
[0040] The main part of the upper mold 11 is convex; the main part of the lower mold 12 is concave; when the upper mold 11 and the lower mold 12 are closed, the bottom of the upper mold 11 is stuck in the concave interior of the main part of the lower mold 12.
[0041] The core 7 includes a core head 71 and a core neck 72 ; the core head 71 is stuck inside the empty knife edge 8 when the mold is closed, and the core neck 72 is located inside the welding chamber 4 when the mold is closed.
[0042] Working principle: The blank is poured in from the feed end 31 of the diverter bridge, and then flows into the welding chamber 4 from the diverter hole 2. The design of the tip of the diverter bridge discharge end 33 improves the metal flow direction and reduces the dead zone formed in the welding chamber 4 due to the obstruction of the diverter bridge 3.
[0043] As the extrusion proceeds, the blank enters the welding chamber 4. Since the welding chamber 4 has an inclined side wall and a large rounded transition between the side wall and the bottom, the accumulation of part of the blank at the corner of the side wall and the bottom of the lower die welding chamber 4 to form a metal flow "dead zone" can be reduced during the process of the blank flowing in, and even the formation of the dead zone can be avoided; this welding chamber 4 structure has almost no dead zone formation, speeds up the outflow of the old blank, and effectively shortens the defects of lateral welding. The contents not described in detail in this specification belong to the prior art known to professionals in this field.
[0044] The above-described embodiments only express the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but the present invention is not limited to these embodiments. It should be noted that it is obvious to those skilled in the art. Without departing from the purpose of the present invention, any improvement made shall fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. An extrusion die structure for shortening a transverse weld, characterized in that: It comprises a mold (1), a diversion hole (2), a diversion bridge (3), a welding chamber (4), a mold core (7), and an empty knife edge (8); The mold (1) comprises an upper mold (11) and a lower mold (12) that cooperate with each other; the upper mold (11) comprises an upper mold feed end (111) and an upper mold discharge end (112); the upper mold feed end (111) is provided with the diverter hole (2) and the diverter bridge (3) extending to the upper mold discharge end (112); the diverter bridge (3) comprises a diverter bridge feed end (31) located at the upper mold feed end (111), a diverter bridge main body (32) located in the middle of the upper mold (11), and a diverter hole (2) and a diverter hole (3) located at the upper mold discharge end (112). (112) has a distributing bridge discharge end (33); the upper mold discharge end (112) and the lower mold (12) form the welding chamber (4); the side wall of the welding chamber (4) located below the distributing hole (2) is set as the first side wall (5); the side wall of the welding chamber (4) located below the distributing bridge (3) is the second side wall (6); the mold core (7) is provided at the lower middle of the bottom of the upper mold (11) (1); the lower mold (12) (1) is provided with the empty knife edge (8) in the middle to cooperate with the mold core (7).
2. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The bridge surface of the feed end (31) of the diverter bridge is sunken relative to the feed end (111) of the upper die.
3. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The discharging end (33) of the diverter bridge is formed into a sharp angle shape, and the angle of the discharging end of the diverter bridge is 35°-60°.
4. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The first side wall (5) and the second side wall (6) at both ends of the welding chamber (4) are arranged at an angle; and the first side wall (5) and the second side wall (6) respectively form an angle of 45°-55° with the bottom of the welding chamber (4).
5. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The first side wall (5) and the second side wall (6) are transitioned to the bottom of the welding chamber (4) using a first transition arc (51) and a second transition arc (61) respectively.
6. The extrusion die structure for shortening the transverse weld according to claim 5, characterized in that: The second transition arc (61) is smaller than the first transition arc (51).
7. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: A lower die feed end (121) is arranged above the welding chamber (4); a diverter bridge pier (9) is arranged on the end surface of the lower die feed end (121).
8. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The upper mold (11) tool (1) and the lower mold (12) tool (1) are provided with positioning holes (10).
9. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The main part of the upper mold (11) is convex; the main part of the lower mold (12) is concave; when the upper mold (11) and the lower mold (12) are closed, the bottom of the upper mold (11) is stuck in the concave interior of the main part of the lower mold (12).
10. The extrusion die structure for shortening the transverse weld according to claim 1, characterized in that: The mold core (7) comprises a mold core head (71) and a mold core neck (72); the mold core head (71) is stuck inside the empty knife edge (8) when the mold is closed, and the mold core neck (72) is located inside the welding chamber (4) when the mold is closed.