CN213915692U

CN213915692U - Fuel injector end cover inner hole fine blanking die

Info

Publication number: CN213915692U
Application number: CN202022391865.9U
Authority: CN
Inventors: 庞溯
Original assignee: Kern Liebers Taicang Co ltd
Current assignee: Kern Liebers Taicang Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-08-10
Anticipated expiration: 2030-10-22

Abstract

The utility model discloses a fuel injector end cover hole fine blanking mould belongs to the mould field. A kind of fuel injector end cap inner hole fine blanking die, including the snowman inner hole single mould, triangular gap single mould and excircle mould inlaid in upper die; the snowman inner hole single die is of a hanging table structure, and the triangular notch single die is of a step shape. The utility model discloses the flatness of fuel injector end cover has been guaranteed to fine blanking die's process characteristic, makes fuel injector end cover one-time stamping forming, need not the subsequent handling and handles.

Description

Fuel injector end cover inner hole fine blanking die

Technical Field

The utility model relates to the field of dies, especially, relate to a fuel injector end cover hole fine blanking mould.

Background

The fuel injector is widely applied to automobiles, and automobile matching manufacturers have the processes of plate cutting and machining and die stamping in the machining of the fuel injector end cover. The fuel injector end cover that present mould punching press was processed often needs subsequent burring, grinds and the board plane and corrects the process because of the precision problem, like the flatness error of lid, the precision of punching press limit and have burr scheduling problem, and workman's amount of labour is great. For mass production, efficiency is affected.

Therefore, those skilled in the art have made efforts to develop a fine blanking die which is formed by one-time stamping without subsequent processes.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that the fine blanking die accomplishes one-time stamping forming, and the product need not the subsequent handling.

In order to achieve the purpose, the utility model provides a fuel injector end cover inner hole fine blanking die, which comprises a snowman inner hole single die, a triangular notch single die and an excircle die which are embedded on an upper die; the snowman inner hole single die is of a hanging table structure, and the triangular notch single die is of a step shape.

Further, the unilateral clearance of the corresponding position between the snowman inner hole single mold and the product is 1% of the thickness of the plate.

Further, the single-die punching speed of the snowman inner hole is 1.95 mm/s.

Further, the unilateral clearance of the corresponding position between the triangular notch single mold and the product is 1% of the thickness of the plate.

Further, the punching speed of the triangular notch single die is 1.95 mm/s.

Furthermore, the device for finely punching the inner hole of the end cover of the fuel injector is also provided with a lower die, and a female die corresponding to the snowman inner hole single die is embedded on the lower die.

Furthermore, a female die corresponding to the single die with the triangular notch is embedded on the lower die.

Furthermore, a female die corresponding to the snowman inner hole single die, a female die corresponding to the triangular notch single die and a blanking female die are integrated.

Furthermore, the snowman inner hole single mould and the triangular notch single mould are made of alloy materials.

Further, the working face precision of the snowman inner hole single mould and the triangular notch single mould is +/-0.03 mm.

The technical effects of the utility model are, use the utility model discloses the flatness and the incision precision of fuel injector end cover can be guaranteed to fine blanking die punching press fuel injector end cover, make fuel injector end cover one-time stamping forming, need not the subsequent handling.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic view of a snowman hole single mold according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of a single mold with triangular notches according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of a fuel injector end cap according to a preferred embodiment of the present invention;

fig. 4 is a schematic illustration of a strip of sheet material.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, 2 and 3, the machined edge of the fuel injector end cap 3 has a snowman hole 31, a triangular notch hole 32 and an outer contour 33. The processing requirement of the end cover 3 of the fuel injector is very high, the snowman inner hole 31 is provided with an opening, the maximum collapse of the bridge-shaped area is 0.3 mm (the narrowest part is only 1.46 mm), and the requirement of the inner diameter is high (the requirement of the inner diameter is high)

) The four evaluation positions of the two surfaces of the fuel injector end cover 3 have flatness (single area is 0.03 mm)And the single-sided two regions combined 0.1 mm). Aiming at the three processing edges, three dies are designed, namely a snowman inner hole single die 1, a triangular notch single die 2 and an excircle die. If the external contour 33 is punched firstly and then the snowman inner hole 31 is punched, the splayed opening of the snowman inner hole 31 can expand outwards and deform, the size of the fuel injector end cover 3 cannot meet the design requirement, and therefore the punching sequence is that the snowman inner hole 31 and the triangular notch hole 32 are punched firstly and the external contour 33 is punched secondly. Ensuring that the fuel injector end cap 3 does not deform.

The processing equipment of the fuel injector end cover 3 comprises an upper die and a lower die, wherein a snowman inner hole single die 1, a triangular notch single die 2 and an excircle die are embedded in the upper die; three female dies respectively corresponding to the snowman inner hole single die 1, the triangular notch single die 2 and the excircle die are all embedded in the lower die, and the female die corresponding to the snowman inner hole single die 1, the female die corresponding to the triangular notch single die 2 and the blanking female die are integrated.

The single-side gap at the corresponding position between the snowman inner hole single mould 1 and the fuel injector end cover 3 is 1 percent of the thickness of the plate, namely 0.0334 millimeters. The punch speed was 35spm (35 punches per minute).

The single-side gap at the corresponding position between the triangular notch single die 2 and the fuel injector end cover 3 is 1% of the thickness of the plate, namely 0.0334 mm. The punch speed was 35spm (35 punches per minute).

The single-sided clearance at the corresponding position between the outer contour die and the fuel injector end cover 3 is 1% of the thickness of the plate, namely 0.0334 mm. The punch speed was 35spm (35 punches per minute).

The punching speed of the snowman inner hole single die 1, the triangular notch single die 2 and the excircle die is 1.95 mm/s.

The snowman inner hole single mould 1 and the triangular gap single mould 2 are made of alloy materials. The working face precision of the snowman inner hole single mould 1 and the triangular notch single mould 2 is +/-0.03 mm.

The upper die adopts a standard stripper and insert structure, the snowman inner hole single die 1 is of a hanging table structure and is in a step shape, and the triangular notch single die 2 is in a step shape. Two single moulds can play the effect of reinforcing intensity like this, increase the punching press number of times, improve the life-span to reduce mould use cost.

The purpose of the platform hanging structure is to prevent the snowman inner hole single mold 1 from falling down from the fixing plate, and particularly, after punching, shearing and cutting, processing is carried out at a specific position to obtain a certain step shape.

The bridge-shaped area of the fuel injector end cover 3 is punched, and the defects of large collapse or fracture and the like are easy to occur. According to the characteristics of the single-die stamping die, an upper hole and a lower hole in a bridge type area, a snowman inner hole 31 and a triangular notch hole 32 are designed and selected, the shapes of the two holes are all small arcs or sharp angles, and the transition positions are all defined with large arcs, so that a corresponding single die can obtain high stamping times and low use cost.

The female die is of an insert block structure, the female die for punching the snowman inner hole 31 and the triangular notch hole 32 is integrated with the subsequent blanking female die, the economical efficiency of die manufacturing and maintenance is considered, the size of the female die of the die is small, two adjacent female dies are connected into an integral female die structure in design, and the female die is characterized by comprising a plurality of small female die functions, simplifying the die structure, reducing the workload of die assembly and subsequent maintenance and reducing the use cost of the die. Insert the shape and be trapezoidal, trapezoidal shape characteristic of inserting makes the unable rotatory 180 degrees installations of die holding personnel, the utility model discloses a reverse installation can be avoided in screw hole and the cotter hole on inserting.

As shown in figure 4, a positioning line is drawn on a plate material belt 4, an upper area and a lower area of a bridge type (a triangular notch hole 32 is arranged on the upper surface, and a snowman inner hole 31 is arranged on the lower surface) are punched firstly, so that the smaller collapse of the bridge type area is ensured, the punching equipment of the fuel injector end cover 3 can continuously punch, and a lower die of the equipment is provided with a product discharging and blowing device, so that the automatic discharging can be realized.

Internal diameter requirement for fuel injector end cap 3

) After the die finishes the stamping of the bridge-shaped area, an inner hole guide pin is placed in the blanking step of the product so as to ensure the stable inner diameter size in the blanking process.

Aiming at the flatness requirements of four areas on two sides of the end cover 3 of the fuel injector, the flatness of the end cover 3 of the fuel injector is ensured by the process characteristics of fine blanking dies.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A fine blanking die for an inner hole of an end cover of a fuel injector is characterized by comprising a snowman inner hole single die, a triangular notch single die and an excircle die which are embedded in an upper die; the snowman inner hole single die is of a hanging table structure, and the triangular notch single die is of a step shape.

2. The fuel injector end cap bore fine blanking die of claim 1, wherein a single side gap at a corresponding location between the snowman bore single die and the product is 1% of the thickness of the plate.

3. The fuel injector end cap bore fine blanking die of claim 1, wherein the snowman bore single die punch speed is 1.95 mm/s.

4. The fuel injector end cap bore fine blanking die of claim 2, wherein a single side gap at a corresponding location between the single die with triangular notches and the product is 1% of the thickness of the plate.

5. The fuel injector end cap inner bore fine blanking die of claim 1, wherein the triangular notch single die punching speed is 1.95 mm/s.

6. The fuel injector end cap bore fine blanking die of claim 1, characterized in that the fuel injector end cap bore fine blanking die apparatus further comprises a lower die on which a female die corresponding to the snowman bore single die is mounted.

7. The fuel injector end cover inner hole fine blanking die as claimed in claim 6, wherein a female die corresponding to the triangular notch single die is embedded in the lower die.

8. The fuel injector end cover inner hole fine blanking die as claimed in claim 1, wherein the female die corresponding to the snowman inner hole single die, the female die corresponding to the triangular notch single die and the blanking female die are integrated.

9. The fuel injector end cap bore fine blanking die of claim 1, wherein said snowman bore single die and said triangular notch single die are made of an alloy material.

10. The fuel injector end cap bore fine blanking die of claim 1, wherein the face accuracy of said snowman bore single die and said triangular notch single die is ± 0.03 mm.