CN216758018U - Thickened nut die - Google Patents

Abstract

The utility model discloses a thickened nut die which is characterized by comprising a pre-shaping die, a front first shaping die, a back first shaping die, a front second shaping die, a back second shaping die and an end face shaping die which are sequentially arranged, wherein the front first shaping die, the back first shaping die, the front second shaping die, the back second shaping die and the end face shaping die respectively comprise an upper end shell forming hole and a lower end inner hole forming hole, a transition surface is arranged between the upper end shell forming hole and the lower end inner hole forming hole, and an exhaust hole communicated with the outside is arranged on the outer side boundary of the transition surface. The utility model has the advantages that the thickened nut with the easy-breaking groove can be produced, and the processing quality and the qualified rate of finished products of the thickened nut are improved.

Description

Thickened nut die

Technical Field

The application relates to the technical field of thickened nuts, in particular to a thickened nut die.

Background

Thickened nuts are nowadays widely used in the field of electrical networks. For example, in chinese patent document, the patent number CN2020224487000 discloses, at 7/16/2021, a utility model named "a linkage clamp for replacing a 10kV arrester with a live line in an indirect operation method", which discloses a linkage clamp for replacing a 10kV arrester with a live line in an indirect operation method, including an arrester, a channel steel is installed at the bottom of the arrester, a linkage clamp is arranged at one side of the channel steel, a suspension bolt is arranged at the bottom of the linkage clamp, a self-locking wire clamp is arranged at one side of the top of the arrester, a lead is connected to the top end of the self-locking wire clamp, and one end of the lead is connected to the top end of the arrester; the linkage anchor clamps include the U-shaped board, and the bottom of arrester is closely welded and is just run through the channel-section steel by the threaded rod, and the upper surface of the other end of U-shaped board is provided with the thickening nut.

The existing thickening nut is usually high-altitude operation when applied to a power grid, a torque wrench is usually adopted to ensure the use reliability of the thickening nut, the locking condition of the thickening nut is judged by measuring a torque value, the force measurement of the thickening torque wrench obviously has higher difficulty when applied to high-altitude operation, and the application cost and the operation time of the thickening nut are improved. For this reason, my department customer has decided a thickening nut to my department's customization, be equipped with easy broken groove on the thickening nut, can twist at the thickening nut through easy broken groove and close the back relevant position fracture that targets in place, thereby high altitude construction need not torque wrench range finding, this kind of thickening nut is because need process easy broken groove, easy broken groove cooperation thickening nut length uses, so machining precision on the thickening nut length direction and the machining precision requirement of thickening nut terminal surface are all higher, in the prior art when the blank of cold-heading thickening nut, can not exhaust between the hole of mould and the outer hole, cause and have the air gap, the quality when making the terminal surface shaping of thickening nut blank is relatively poor, especially the corner position of terminal surface, form the defect easily, influence the product percent of pass.

Disclosure of Invention

Based on the defects in the prior art, the utility model provides the thickened nut die which can be used for producing thickened nuts with easy-to-break grooves and improving the processing quality and the qualified rate of finished products of the thickened nuts.

In order to achieve the above object, the present invention adopts the following technical solutions.

The utility model provides a thickening nut mould, characterized by, including the pre-sizing die that sets gradually, the first sizing die in front, the first sizing die in back, the second sizing die in front, back second sizing die and terminal surface sizing die all include upper end shell shaping hole and lower extreme hole shaping hole, be equipped with the transition face between upper end shell shaping hole and the lower extreme hole shaping hole, be equipped with the outside exhaust hole of intercommunication on the outside boundary of transition face.

Upsetting the cylindrical blank into a disc shape through a pre-forming die; putting the disc blank into a first shaping die on the front surface, and completing primary shaping of the front surface end surface of the blank, hexagonal prism shaping of the outer side surface of the blank and threaded hole shaping of the inner side of the blank to form a hexagonal prism blank; the hexagonal prism blank is with 180 degrees upsets the back, the first plastic mould in the back is put into to the another side of hexagonal prism, accomplish the back plastic, later divide twice with the blank rotate 180 degrees put into positive second sizing die and back second sizing die respectively, accomplish the secondary plastic of nut, the upset of the back is again flattened to the terminal surface sizing die, there is the difference in the front and the back of thickening nut, because be equipped with the outside exhaust hole of intercommunication on the outside boundary of the transition face of this application, can not produce the defect because of gaseous existence during the terminal surface shaping of thickening nut, improve product percent of pass and processingquality.

Preferably, the axial cross-section of the vent hole increases in height dimension outwardly from the transition surface. When realizing exhausting, reduce the influence of exhaust hole to nut cold-heading, guarantee nut processingquality.

Preferably, the transition surface of the front first shaping die is a circular table top, and the vertex angle of the transition surface of the front first shaping die is in the range of 108 degrees to 112 degrees. As the first end face shaping, the control of the end face taper angle of the thickened nut is small, the subsequent secondary shaping is facilitated, and the product quality is ensured.

Preferably, the transition surfaces of the back first shaping die and the front second shaping die are round table surfaces; the angle of the vertex angle of the transition surface of the back first sizing die and the front second sizing die is 120 degrees. Further shaping of the end face is completed.

Preferably, the transition surfaces of the back second sizing die and the end face sizing die are annular flat surfaces. The annular plane completes the end face upsetting of the thickened nut, so that the back face of the thickened nut has higher flatness and the thickened nut is used as a reference to facilitate the position determination of a subsequent processing groove.

Preferably, the shape of the upper end shell forming hole is a regular hexagonal prism, and the exhaust holes on the front first shaping die, the back first shaping die and the front second shaping die correspond to the lower end positions of the edges of the upper end shell forming hole. The front first shaping die, the back first shaping die and the front second shaping die are mainly used for finishing the forming of the corner at the lower end of the outer edge of the thickened nut, so that an exhaust hole is formed in the corner, and the forming quality of the lower end of the outer edge of the thickened nut is guaranteed.

Preferably, the air exhaust holes of the back second sizing die and the end face sizing die correspond to the lower end edge position of the upper end shell forming hole. The second back sizing die and the end face sizing die mainly finish the end face forming of the back of the thickened nut, particularly finish the forming of the lower end edge of the back of the nut, ensure the forming quality of the lower end edge of the back of the thickened nut and facilitate the processing of a subsequent processing groove.

The utility model has the following beneficial effects: the thickened nut with the easy-to-break groove can be produced, and the processing quality and the finished product qualification rate of the thickened nut are improved.

Drawings

FIG. 1 is a structural schematic of the present invention.

Fig. 2 is a schematic view of the internal structure of the front first sizing die of the present invention.

Fig. 3 is a schematic structural view of the thickening nut of the present invention.

In the figure: a pre-sizing die 1 is provided with a first sizing die 2 on the front surface, a first sizing die 3 on the back surface, a second sizing die 4 on the back surface, a second sizing die 5 on the end surface, a shell forming hole 7 at the upper end of a sizing die 6, an inner hole forming hole 8 transition surface 9, an exhaust hole 10, a thickened nut 11, a stepped hole 12, a front surface 13 and a back surface 14.

Detailed Description

The utility model is further illustrated with reference to the figures and the specific embodiments.

In the embodiment of the method, the first step,

as shown in fig. 1 and 2, a thickened nut die comprises a pre-shaping die 1, a front first shaping die 2, a back first shaping die 3, a front second shaping die 4, a back second shaping die 5 and an end face shaping die 6 which are sequentially arranged, wherein the pre-shaping die 1, the front first shaping die 2, the back first shaping die 3, the front second shaping die 4, the back second shaping die 5 and the end face shaping die 6 are all half-section shapes, and the dies are all in bilateral symmetry shapes, so that only half die internal views are displayed in fig. 1, and six dies can be clearly displayed in the same drawing. The front first sizing die 2, the back first sizing die 3, the front second sizing die 4, the back second sizing die 5 and the end face sizing die 6 all comprise an upper end shell forming hole 7 and a lower end inner hole forming hole 8. As shown in fig. 3, the inner hole of thickened nut 11 is stepped hole 12, the hole surface with smaller diameter in stepped hole 12 is turned with threads, the end surface of the threaded hole is thickened nut back 14, the hole surface with larger diameter in stepped hole 12 is smooth hole, and the end surface of the smooth hole is thickened nut front 13. The easy-to-break groove of the thickened nut is arranged corresponding to the step surface of the step hole. And when the thickened nut is formed by cold heading, the two ends of the thickened nut are provided with thimbles with different diameters to complete the setting of the step surface. The pre-shaping die 1, the front first shaping die 2, the back first shaping die 3, the front second shaping die 4, the back second shaping die 5 and the end face shaping die 6 which are disclosed by the application are fixed dies, and assemblies for processing conventional nuts such as corresponding stamping dies, ejector pins and the like are also arranged in practical application. A transition surface 9 is arranged between the upper end shell forming hole 7 and the lower end inner hole forming hole 8, and an exhaust hole 10 communicated with the outside is arranged on the outer side boundary of the transition surface 9. The axial cross-section of the venting orifice 10 has a height dimension which increases progressively outwards from the transition surface 9. The exhaust holes 10 are not limited to a regular shape, and may be conical or triangular pyramid-shaped. The transition surface 9 of the front first shaping die 2 is a circular table surface, and the angle of the vertex angle of the transition surface 9 of the front first shaping die 2 is 110 degrees. Transition surfaces 9 of the first shaping die 3 on the back surface and the second shaping die 4 on the front surface are both round table surfaces; the angle of the apex angle of the transition face 9 of the back first sizing die 3 and the front second sizing die 4 is 120 degrees. The transition surfaces 9 of the back second sizing die 5 and the end face sizing die 6 are annular flat surfaces. The shape of the upper end shell forming hole 7 is a regular hexagonal prism, and the exhaust holes 10 on the front first shaping die 2, the back first shaping die 3 and the front second shaping die 4 correspond to the lower end positions of the edges of the upper end shell forming hole 7. The air exhaust holes 10 of the back second sizing die 5 and the end face sizing die 6 correspond to the lower end edge positions of the upper end shell forming holes 7.

Upsetting the cylindrical blank into a disc shape through a preforming die; putting the disc blank into a front first shaping die 2 to finish primary forming of the front end face of the blank, hexagonal prism forming of the outer side face of the blank and threaded hole forming of the inner side of the blank to form a hexagonal prism blank; after the hexagonal prism blank overturns 180 degrees, the other side of the hexagonal prism is placed into the first shaping die 3 on the back, the back shaping is completed, then the blank is rotated 180 degrees twice and is respectively placed into the second shaping die 4 on the front side and the second shaping die 5 on the back side, the secondary shaping of the nut is completed, the end face shaping die 6 completes the upsetting of the back side again, the front side and the back side of the thickened nut have differences, the back side is used for being attached to the surface of a workpiece, higher flatness is needed, the front side can be twisted off, and therefore the processing requirement is lower. Because be equipped with the outside exhaust hole 10 of intercommunication on the outside boundary of the transition face 9 of this application, can not produce the defect because of gaseous existence during the terminal surface shaping of thickening nut, improve product percent of pass and processingquality. The first sizing die 2 in front, the first sizing die 3 in back and the second sizing die 4 in front mainly accomplish the shaping of thickening nut outside arris lower extreme corner department, and the setting of three mould inside exhaust hole 10 can guarantee the shaping quality of thickening nut outside arris lower extreme. The second sizing die 5 and the end face sizing die 6 on the back mainly accomplish the terminal surface shaping at the thickening nut back, especially accomplish the shaping at nut back lower extreme border, and the setting of two inside exhaust holes 10 of mould can guarantee the shaping quality at 11 back lower extreme borders of thickening nut. The arrangement of the exhaust hole 10 improves the processing quality of the thickened nut 11. When thickening nut 11 is screwed up, 11 back fashioned horizontal planes of thickening nut and work piece thread tightening, easy broken groove encircle thickening nut and radially set up at thickening nut, and half section that thickening nut openly corresponds can directly be twisted off.

Claims (7)

1. The utility model provides a thickening nut mould, characterized by, including the pre-sizing die that sets gradually, the first sizing die in front, the first sizing die in back, the second sizing die in front, back second sizing die and terminal surface sizing die all include upper end shell shaping hole and lower extreme hole shaping hole, be equipped with the transition face between upper end shell shaping hole and the lower extreme hole shaping hole, be equipped with the outside exhaust hole of intercommunication on the outside boundary of transition face.

2. A thickened nut die as claimed in claim 1, wherein the axial cross-section of the vent bore increases in height outwardly from the transition surface.

3. The die set of claim 1, wherein the transition surface of the front first sizing die is a circular table top, and the vertex angle of the transition surface of the front first sizing die is in the range of 108 degrees to 112 degrees.

4. The thickened nut die as claimed in claim 1 or 3, wherein the transition surfaces of the back first sizing die and the front second sizing die are both circular table surfaces; the angle of the vertex angle of the transition surface of the back first sizing die and the front second sizing die is 120 degrees.

5. A thickened nut die as claimed in claim 1, wherein the transition surfaces of said rear second sizing die and said end sizing die are annular flat surfaces.

6. A thickened nut die as claimed in claim 1 or 2, wherein the shape of the upper housing forming hole is a regular hexagonal prism, and the vent holes on the front first sizing die, the back first sizing die and the front second sizing die correspond to the lower end positions of the edges of the upper housing forming hole.

7. The die set of claim 6, wherein the vent holes of the back second sizing die and the end sizing die correspond to the lower edge of the forming hole of the upper housing.

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