一种点焊螺丝成型模具

Abstract

本实用新型提供一种点焊螺丝成型模具，包括机床，机床内设置有第一模组、第二模组和第三模组，第一模组包括第一上模和第一下模，第二模组包括第二上模和第二下模，第三模组包括第三上模和第三下模；第一上模包括第一上模体和第一上模芯，第一下模包括第一下模体和第一下模芯；第二上模包括第二上模体和第二上模芯，第二上模芯开设有第一排气孔和第二连接空腔，第一排气孔的一端与第二上成型模腔连通，第一排气孔的另一端与第二连接空腔连通，第二连接空腔与第二空腔连通；第二下模包括第二下模体和第二下模芯；第三上模包括第三上模体和第三上模芯，第三下模体与第三下模芯相对的内侧壁周向开设有多个第二排气孔；有效解决气体滞留问题。

Claims

1. A spot welding screw forming mold, comprising a machine tool, wherein a first module, a second module and a third module are sequentially arranged in the machine tool according to the forming steps, the first module comprising a first upper mold (45) and a first lower mold (47), the second module comprising a second upper mold (50) and a second lower mold (51), and the third module comprising a third upper mold (48) and a third lower mold (49), wherein the first upper mold (45), the second upper mold (50) and the third upper mold (48) are respectively installed on the movable parts of the machine tool, and the first lower mold (47), the second lower mold (51) and the third lower mold (49) are respectively installed on the fixed parts of the machine tool, wherein the machine tool respectively causes the first upper mold (45) and the first lower mold (47), the second upper mold (50) and the second lower mold (51), and the third upper mold (48) and the third lower mold (49) to complete the docking action; characterized in that The first upper mold (45) includes a first upper mold body (11) and a first upper mold core (13). The first upper mold core (13) is correspondingly fitted onto the lower surface of the first upper mold body (11). The first upper mold core (13) has a first upper forming cavity (14). The first upper mold body (11) has a first cavity (12). A first connecting cavity (15) is formed between the first cavity (12) and the first upper forming cavity (14). The first lower mold (47) includes a first lower mold body (18) and a first lower mold core (17). The first lower mold core ( 17) Correspondingly fitted on the upper surface of the first lower mold body (18), the upper part of the first lower mold core (17) is provided with a first lower molding cavity (52) that cooperates with the first upper molding cavity (14), the first lower mold body (18) is provided with a first ejector hole (19) for receiving the first ejector rod, the lower part of the first lower mold core (17) is provided with a second connecting cavity (53) that communicates with the first ejector hole (19) and the first lower molding cavity (52) respectively, and the inner diameter of the second connecting cavity (53) is equal to the inner diameter of the first ejector hole (19); The second upper mold (50) includes a second upper mold body (16) and a second upper mold core (23). The second upper mold core (23) is correspondingly fitted onto the lower surface of the second upper mold body (16). The second upper mold core (23) has an arc-shaped second upper forming cavity (24). The second upper mold body (16) has a second cavity (22). The second upper mold core (23) has a first vent hole (26) and a second connecting cavity (25). One end of the first vent hole (26) communicates with the second upper forming cavity (24), and the other end of the first vent hole (26) communicates with the second connecting cavity (25). The second connecting cavity (25) communicates with the second cavity (22). The inner diameter of the first vent hole (26) is smaller than the inner diameter of the second connecting cavity (25), and the inner diameter of the second connecting cavity (25) is smaller than the inner diameter of the second cavity (22). The second lower mold (51) includes a second lower mold body (27) and a second lower mold core (23). 29); The second lower mold core (29) is correspondingly fitted onto the upper surface of the second lower mold body (27). The second lower mold core (29) is provided with two interconnected second lower forming cavities A (32), B (34), C (31), D (33), and E (21) coaxially from top to bottom. The second lower mold body (27) is provided with a second ejector hole (28) for receiving the second ejector rod. The second lower forming cavity E (21) is connected to the second ejector hole (28), and the inner diameter of the second lower forming cavity E (21) is equal to the inner diameter of the second ejector hole (28); the second lower forming cavity E (21) and the second ejector hole (28) are coaxially arranged; the inner diameter of the second lower forming cavity C (31) is greater than the inner diameter of the second lower forming cavity E (21); the inner diameter of the second lower forming cavity A (32) is greater than the inner diameter of the second lower forming cavity C (31); The third upper mold (48) includes a third upper mold body (54) and a third upper mold core (36). The third upper mold core (36) is correspondingly fitted onto the lower surface of the third upper mold body (54), and the third upper mold core (36) has a third upper forming cavity (37). The third lower mold (49) includes a third lower mold body (42) and a third lower mold core (41). The third lower mold core (41) is correspondingly fitted onto the upper surface of the third lower mold body (42). On the surface, the third lower mold core (41) has three coaxial and interconnected lower molding cavities A (46), B (55), C (39), D (56), E (44), and F (43) sequentially from top to bottom; the third lower mold body (42) has a third ejection hole (58) for receiving the third ejector pin; the bottom of the third lower mold core (41) has a total of A third connecting cavity (57) is provided on the axis, communicating with the third lower forming mold cavity F (43), and the third connecting cavity (57) is communicating with the third ejection hole (58); the third connecting cavity (57) and the third ejection hole (58) are coaxially arranged and have the same inner diameter; the upper surface of the third lower mold core (41) is provided with a plurality of welding point forming holes (38) arranged in a circumferential array; the third lower mold body (42) is opposite to the third lower mold core (41). Multiple second vent holes (35) are provided circumferentially on the inner sidewall; the inner diameter of the third lower molding cavity A (46) is larger than the inner diameter of the third lower molding cavity C (39), the inner diameter of the third lower molding cavity C (39) is larger than the inner diameter of the third lower molding cavity E (44), the inner diameter of the third lower molding cavity E (44) is larger than the inner diameter of the third connecting cavity (57); a sixth rounded portion is formed at the bottom of the inner cavity of the third upper molding cavity (37); The inner walls of the first lower forming cavity (52), the second lower forming cavity A (32), the second lower forming cavity B (34), the second lower forming cavity C (31), the second lower forming cavity D (33), the second lower forming cavity E (21), the third lower forming cavity A (46), the third lower forming cavity B (55), the third lower forming cavity C (39), the third lower forming cavity D (56), the third lower forming cavity E (44), and the third lower forming cavity F (43) are all hardened protective layers formed by laser quenching.

2. A spot face die as defined in claim 1, wherein: The inner diameter of the first cavity (12) is greater than the inner diameter of the first connecting cavity (15); the inner diameter of the first upper molding cavity (14) is equal to the inner diameter of the first connecting cavity (15).

3. A spot face die as defined in claim 1, wherein: The first exhaust port (26), the second connecting cavity (25), and the second cavity (22) are coaxially arranged.

4. The spot-welded screw forming die of claim 1, wherein: The third lower molding cavity A (46) has a first rounded portion at the opening side edge; the cross section of the third lower molding cavity B (55) is a trapezoid that is wider at the top and narrower at the bottom; the bottom of the third lower molding cavity D (56) has a fifth rounded portion; the cross section of the third lower molding cavity F (43) is a trapezoid that is wider at the top and narrower at the bottom.

5. A spot face die as defined in claim 1, wherein: The bottom of the first lower forming cavity (52) is provided with a second rounded portion (59).

6. A spot face die as defined in claim 1, wherein: The bottom of the second lower forming cavity D (33) is provided with a third rounded portion; the opening end face of the second lower forming cavity A (32) is provided with a fourth rounded portion; the cross section of the second lower forming cavity B (34) is a trapezoid that is wider at the top and narrower at the bottom.

Images