CN216369813U

CN216369813U - Flat-head inner hexagonal screw stamping die and screw formed by stamping through die

Info

Publication number: CN216369813U
Application number: CN202122511007.8U
Authority: CN
Inventors: 陈克
Original assignee: Wenzhou Aite Hardware Products Co ltd
Current assignee: Wenzhou Aite Hardware Products Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-26
Anticipated expiration: 2031-10-19

Abstract

The utility model relates to an inner hexagonal screw, in particular to a flat-head inner hexagonal screw stamping die and a screw formed by stamping through the die, and solves the problem of processing the screw by the inner hexagonal die. The punching die comprises a punching die I, a punching die II, a punching die III, a die I, a die II and a die III, wherein the punching die I corresponds to the die I, the punching die II corresponds to the die II, the punching die III corresponds to the die III in a pairwise manner, a trapezoidal groove is formed in the punching die I, the width of the trapezoidal groove is gradually reduced from the notch inwards, a first pressing groove is formed in the die I, a chamfer is formed in the bottom edge of the first pressing groove, a second pressing groove is formed in the die II, a radius is formed in the bottom edge of the second pressing groove, a transition groove is formed in the punching die II, the size of the die and the extruding taper and pressing angle of an inner screw are adjusted, the structural design is optimized, the size and precision requirements of a product are guaranteed, and the strength of the screw is also improved. The processing technology is simpler and more convenient, and the production efficiency is greatly improved.

Description

Flat-head inner hexagonal screw stamping die and screw formed by stamping through die

Technical Field

The utility model relates to an inner hexagonal screw, in particular to a flat-head inner hexagonal screw stamping die and a screw formed by adopting the flat-head inner hexagonal screw stamping die.

Background

The flat head inner hexagon socket head cap screw inner wall of the prior art has creases, presents two steps, and the size of two steps differs moreover, and the atress is inhomogeneous when cooperating with the spanner, because the precision is not high enough, still appears the phenomenon that the inner hexagon skidded, torsion is not enough, screws up hard easily. Although socket head cap screws are mature technical products, the existing problem is that the use requirements of users cannot be completely met.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a flat-head inner hexagonal screw stamping die and a screw which is formed by stamping through the die.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a flat-head inner hexagonal screw stamping die comprises a first stamping tool, a second stamping tool, a third stamping tool, a first die, a second die and a third die, wherein two stamping tools are correspondingly stamped between the first stamping tool and the first die, between the second stamping tool and the second die and between the third stamping tool and the third die, a trapezoidal groove is formed in the first stamping tool, the width of the trapezoidal groove is gradually reduced from a notch to the inside, a first pressing groove is formed in the first die, a chamfer is formed in the bottom edge of the first pressing groove, a second pressing groove is formed in the second die, a chamfer is formed in the bottom edge of the second pressing groove, a transition groove is formed in the second stamping tool, a groove cone is arranged in the transition groove, a plurality of coaxial annular surfaces are formed in the periphery of the groove cone, a finished groove which is matched with the shape and the size of a screw is formed in the third stamping tool, and a stamping head which is in the shape of the corresponding inner hexagonal is formed in the third die.

The width of the notch of the trapezoid groove is 7.0-8.5mm, the internal acute angle of the trapezoid cross section of the trapezoid groove is 10-20 degrees, and the depth of the trapezoid groove is 5.0-6.0 mm.

The sum of two symmetrical chamfers in the first indent is 60-80 degrees, and the width of the notch of the first indent is 6.6-7.0 mm.

The radius is between 0.6-0.9mm, and the radius inner diameter is greater than the chamfer inner diameter.

The groove cone is of a circular truncated cone structure, the radial section of the groove cone is isosceles trapezoid, the included angle of symmetrical edges on two sides of the section is between 120 DEG and 160 DEG, and the width of the groove cone is between 4.5 and 5.5.

The ring surface comprises an inner ring and an outer ring, the outer diameter of the inner ring is 8-11mm, the outer diameter of the outer ring is 9-12mm, and an included angle of 80-100 degrees is formed between two side edges of the radial section of the outer ring.

The screw comprises a screw body, wherein the screw body is sequentially provided with a screw head part, a transition part and a screw column part.

The transition portion is provided with a radius.

The utility model has the beneficial effects that: according to the flat-head inner hexagonal screw stamping die and the screw formed by stamping through the die, the size of the die, the extrusion taper and the extrusion angle of the inner screw and the optimized structural design are adjusted, so that the requirements on the size and the precision of the processed flat-head inner hexagonal screw are met, the strength of the inner hexagonal screwing force is improved, and the flat-head inner hexagonal screw is not easy to be damaged by screwing and slip. The processing technology is simpler and more convenient, and the production efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of a corresponding structure of a die punch according to the present invention;

FIG. 2 is an enlarged schematic view of a second punch of the present invention;

fig. 3 is a schematic view of a structure of a three-punch structure of the punch of the present invention.

Detailed Description

As shown in fig. 1-3, a flat-head inner hexagonal screw stamping die comprises a first stamping tool 1, a second stamping tool 2, a third stamping tool 3, a first die 4, a second die 5 and a third die 6, wherein two stamping tools are correspondingly stamped between the first stamping tool 1 and the first die 4, between the second stamping tool 2 and the second die 5 and between the third stamping tool 3 and the third die 6, the first stamping tool 1 is provided with a trapezoidal groove 7, the width of the trapezoidal groove 7 is gradually reduced from the notch to the inside, the first die 4 is provided with a first indent 8, the bottom edge of the first indent 8 is provided with a chamfer, the second die 5 is provided with a second indent 9, the bottom edge of the second indent 9 is provided with a radius, the second stamping tool 2 is provided with a transition groove 10, the transition groove 10 is internally provided with a groove cone 11, the transition groove 10 is provided with a plurality of coaxial ring surfaces 12 around the groove cone 11, the third stamping tool 3 is provided with a finished groove 13 which is matched with the shape and size of a screw, and a punching head 14 corresponding to the hexagon socket shape is arranged on the third die 6.

The width of the notch of the trapezoidal groove 7 is 7.0-8.5mm, the internal acute angle of the trapezoidal section of the trapezoidal groove 7 is 10-20 degrees, and the groove depth of the trapezoidal groove 7 is 5.0-6.0 mm. The sum of two symmetrical chamfers in the first indent 8 is 60-80 degrees, and the width of the notch of the first indent 8 is 6.6-7.0 mm. The radius is between 0.6-0.9mm, and the radius inner diameter is greater than the chamfer inner diameter. The groove cone 11 is of a circular truncated cone structure, the radial section of the groove cone 11 is an isosceles trapezoid, the included angle of the symmetrical edges at two sides of the section is between 120 DEG and 160 DEG, and the width of the groove cone 11 is between 4.5 and 5.5. The ring surface 12 comprises an inner ring and an outer ring, the outer diameter of the inner ring is 8-11mm, the outer diameter of the outer ring is 9-12mm, and an included angle of 80-100 degrees is formed between two side edges of the radial section of the outer ring.

The screw comprises a screw body, wherein the screw body is sequentially provided with a screw head part, a transition part and a screw column part. The transition portion is provided with a radius.

The processing principle is summarized as follows: the raw material is punched by a punching tool I1 and a die I4 to form a semi-finished product with one wide end, a curved surface corresponding to the side surface of the head part of the screw and a chamfer angle at the transition part. And then punching by a second punching tool 2 and a third die 6 to preliminarily form the due shape of the screw head part, wherein the transition part is rounded. And a third punching tool 3 and a third die 6 form a final hexagon socket hole and an inverted right angle on the stud part through punching.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, are not to be considered as limiting the present invention, and that the fundamental principles, the main features, and the advantages of the present invention are shown and described above, as would be understood by those skilled in the art.

Claims

1. The flat-head inner hexagonal screw stamping die is characterized by comprising a first stamping tool, a second stamping tool, a third stamping tool, a first die, a second die and a third die, wherein two stamping tools are correspondingly stamped between the first stamping tool and the first die, between the second stamping tool and the second die and between the third stamping tool and the third die, a trapezoidal groove is formed in the first stamping tool, the width of the trapezoidal groove is gradually reduced from a notch to the inside, a first pressing groove is formed in the first die, a chamfer is formed in the bottom edge of the first pressing groove, a second pressing groove is formed in the second die, a radius is formed in the bottom edge of the second pressing groove, a transition groove is formed in the second stamping tool, a groove cone is arranged in the transition groove, a plurality of coaxial annular surfaces are formed in the periphery of the transition groove cone, a finished groove which is matched with the shape and the size of a screw is formed in the third stamping tool, and a stamping head which is corresponding to the inner hexagonal shape is formed in the third die.

2. The flat head inner hexagonal screw stamping die of claim 1, wherein the width of the notch of the trapezoidal groove is set between 7.0mm and 8.5mm, the inner acute angle of the trapezoidal section of the trapezoidal groove is set between 10 degrees and 20 degrees, and the depth of the trapezoidal groove is set between 5.0 mm and 6.0 mm.

3. The flat head inner hexagonal screw punching die according to claim 1, wherein the sum of two symmetrical chamfers in a pressing groove is between 60 and 80 degrees, and the width of a notch of the pressing groove is between 6.6 and 7.0 mm.

4. A hexagon flat head inner hexagonal screw punching die according to claim 2 or 3, characterized in that the radius of the radius is between 0.6-0.9mm, and the radius inner diameter is larger than the chamfer inner diameter.

5. The flat-head inner hexagonal screw stamping die as claimed in claim 4, wherein the slot taper is of a truncated cone structure, the radial section of the slot taper is isosceles trapezoid, the included angle of the two symmetrical sides of the section is between 120 degrees and 160 degrees, and the width of the slot taper is between 4.5-5.5 degrees.

6. The flat head inner hexagonal screw stamping die of claim 5, wherein the ring surface comprises an inner ring and an outer ring, the outer diameter of the inner ring is between 8 mm and 11mm, the outer diameter of the outer ring is between 9mm and 12mm, and the two sides of the radial section of the outer ring form an included angle of 80 degrees to 100 degrees.

7. A punch forming screw using the flat head inner hexagonal screw punching die of claim 1, comprising a screw body having a screw head portion, a transition portion and a screw post portion in this order.

8. The impact formed screw of claim 7, wherein said transition portion is provided with a radius.