CN202037255U

CN202037255U - Stretching and forming die for U-shaped iron of horn

Info

Publication number: CN202037255U
Application number: CN201120129135XU
Authority: CN
Inventors: 高建华; 王志强
Original assignee: NINGBO XIANGYANG TANKESITE ELECTRONICS CO Ltd
Current assignee: NINGBO XIANGYANG TANKESITE ELECTRONICS CO Ltd
Priority date: 2011-04-20
Filing date: 2011-04-20
Publication date: 2011-11-16
Anticipated expiration: 2021-04-20

Abstract

The utility model discloses a stretching and forming die for a U-shaped iron of a horn. The stretching and forming die for the U-shaped iron of the horn comprises an upper die plate (1), a concave die (2), a convex die (4), a lifting and pressing plate (6), a lower die plate (5) and a guiding column, wherein the lifting and pressing plate (6) and the convex die (4) are connected to the lower die plate (5); the concave die (2) is connected to the upper die plate (1); one end of the guide column is connected with the lower die plate (5), and the other end is in sliding fit with the upper die plate (1); a limit block (8) protruding outward is arranged at the concave bottom of the concave die (2); and the limit block (8) is matched with a groove (7) on a stretched U-shaped iron semi-finished product (3) in shape. By adopting the structure, the middle part of the U-shaped iron semi-finished product is pressed by the limit block, and the bottom deformation of the U-shaped iron semi-finished product is prevented, therefore, the forming precision of the stretched U-shaped finished product is ensured, and the quality of the product is improved.

Description

The drawing and forming mould of loudspeaker U iron

Technical field

The utility model relates to the machine die field, specifically is a kind of drawing and forming mould of the loudspeaker U iron in the stretching process of making loudspeaker U iron.

Background technology

Loudspeaker are a kind of electroacoustic converting members, and it converts the sound signal of telecommunication to sound.Car horn generally comprises U iron or T iron, and wherein, U iron generally has the interior concave space that can place magnetite, during use magnetite and voice coil loudspeaker voice coil are placed in the interior concave space of U iron, then with the U ferropexy on the basin frame.Usually, U iron is by the die drawn moulding, and the U iron drawing die of prior art comprises cope match-plate pattern, punch, die, lower bolster and guide pillar, punch is fixed on the lower bolster, die is fixed on the cope match-plate pattern, and an end of guide pillar is connected with lower bolster, and the other end and cope match-plate pattern are slidingly matched.But, there is following shortcoming in the U swage tool of this structure: have some U iron also to have an inside projection in the bottom, realize through twice stretching in the prior art, lobed semi-finished product in the middle of before this blank being drawn into, carrying out flange again stretches, like this, just have two pairs of moulds and finish the stretching of this two procedures; And after in the drawing die that adopted in once the stretching, usually the bottom surface of die is the plane, like this, when carrying out concavo-convex mould flange when stretching, because the principle of active force and reaction force, U iron semi-finished product mid portion is easy to produce distortion under the effect of reaction force, thereby influences the formed product precision.

The utility model content

Technical problem to be solved in the utility model is a kind of U of avoiding iron mid portion distortion to be provided, thereby to guarantee the drawing and forming mould of the loudspeaker U iron of formed product precision.

For solving the problems of the technologies described above, the drawing die of the loudspeaker U iron that the utility model provides, comprise cope match-plate pattern, die, punch, lift pressing plate, lower bolster and guide pillar, describedly lift pressing plate and punch is connected on the lower bolster, described die is connected on the cope match-plate pattern, and an end of described guide pillar is connected with lower bolster, and the other end and cope match-plate pattern are slidingly matched, the indent of described die bottom has cambered outwards limited block, and the shape of described limited block matches with groove on the U iron semi-finished product that are stretched.

After adopting above structure, the utility model compared with prior art, have following advantage: owing to have cambered outwards limited block on the interior concave bottom of die, the groove of this limited block and the half-finished bottom of U iron matches, like this, when U iron semi-finished product are carrying out flange when stretching, limited block and groove fit are pushed down the half-finished mid portion of U iron, prevent U iron semi-finished product deformation of bottom, thereby the formed precision of the U iron finished product after guaranteeing to stretch, and then improve the quality of products.

As improvement, described limited block and die are one.After adopting integral structure, guarantee the positioning accuracy of limited block more, therefore, more can guarantee the drawing and forming precision.

Description of drawings

Fig. 1 is state diagram before and after the half-finished stretching of U iron;

Fig. 2 is the structural representation of the drawing and forming mould of the utility model loudspeaker U iron.

Wherein, 1, cope match-plate pattern; 2, die; 3, U iron semi-finished product; 4, punch; 5, lower bolster; 6, lift pressing plate; 7, groove; 8, limited block.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

By the structural representation of the drawing and forming mould of the utility model loudspeaker U iron illustrated in figures 1 and 2 as can be known, it comprises cope match-plate pattern 1, die 2, punch 4, lifts pressing plate 5, lower bolster 7 and guide pillar (not shown in the accompanying drawing), describedly lift pressing plate 6 and punch 4 is connected on the lower bolster 5, described die 2 is connected on the cope match-plate pattern 1, one end of described guide pillar is connected with lower bolster 5, and the other end and cope match-plate pattern 1 are slidingly matched.The indent of described die 2 bottom has cambered outwards limited block 8, and the shape of described limited block 8 matches with groove 7 on the U iron semi-finished product 3 that are stretched.Described limited block 8 is an one with die 2.

The utility model is not limited to above-described structure, and wherein limited block 8 also can be split-type structural with die 2, so that the limited block of replacing different size is to adapt to U iron bottom recesses size.

More than change and fall within the assurance scope of the present utility model.

Claims

1. the drawing and forming mould of a loudspeaker U iron, comprise cope match-plate pattern (1), die (2), punch (4), lift pressing plate (6), lower bolster (5) and guide pillar, describedly lift pressing plate (6) and punch (4) is connected on the lower bolster (5), described die (2) is connected on the cope match-plate pattern (1), one end of described guide pillar is connected with lower bolster (5), the other end and cope match-plate pattern (1) are slidingly matched, it is characterized in that: the indent of described die (2) bottom has cambered outwards limited block (8), and the shape of described limited block (8) matches with groove (7) on the U iron semi-finished product (3) that are stretched.

2. the drawing and forming mould of loudspeaker U iron according to claim 1 is characterized in that: described limited block (8) is an one with die (2).