CN110666028B

CN110666028B - Noise-reducing and shock-absorbing knife block for trimming die of automobile covering part

Info

Publication number: CN110666028B
Application number: CN201910777029.3A
Authority: CN
Inventors: 乔丁胜; 王征; 孙莹
Original assignee: Nanjing Qiaofeng Automobile Parts Technical And R&d Co ltd
Current assignee: Nanjing Qiaofeng Automobile Parts Technical And R&d Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2022-07-15
Anticipated expiration: 2039-08-22
Also published as: CN110666028A

Abstract

The invention relates to a noise-reducing and shock-absorbing knife block for an automobile panel trimming die, which comprises an upper die knife block, wherein a cut-in knife block is arranged on the working surface of the upper die knife block, a position pin hole is formed in an installation seat of the upper die knife block, the cut-in knife block is a wave curved surface, and cut-in sharp points are uniformly arranged on the top of the curved surface of the cut-in knife block. According to the invention, the cutting-in cutter block of the upper mould cutter block is uniformly provided with the wave curved surface, the top of the curved surface of the cutting-in cutter block is provided with the cutting-in sharp point, and the most original line contact trimming is changed into progressive point contact, so that the peak value number of the trimming force can be greatly reduced, the instantaneous peak value is avoided, and the cutting-in sharp point is used for reducing the noise and vibration of the upper and lower cutter blocks during the shearing.

Description

Noise-reducing and shock-absorbing knife block for trimming die of automobile covering part

Technical Field

The invention relates to the technical field of automobile mould tools, in particular to a noise-reducing and shock-absorbing knife block for an automobile panel trimming mould.

Background

The blanking force of the trimming die for automobile panel is peaked at the moment of trimming, as shown in fig. 1, and the process force exhibits a step-off linear relationship, and as can be seen from the linear graph of fig. 1, the die process force is increased to 350T at the moment of trimming, and then is instantaneously released, thereby generating vibration and noise of the die. Due to the instantaneous generation and release of the trimming force, the die can generate large vibration and noise during the punching process. With the improvement of the national requirement on environmental protection and the improvement of the requirement on production environment by die stamping workers, the original high-noise and vibrating die cannot meet the market requirement.

Disclosure of Invention

The invention aims to provide a noise-reducing and vibration-eliminating knife block for a trimming die of an automobile panel, which can reduce noise and vibration of the trimming die in the stamping process so as to solve the problems in the background technology.

In order to realize the purpose, the technical scheme of the invention is as follows:

the utility model provides a noise reduction and shock absorption sword piece for automobile panel deburring mould, includes mould sword piece, the working face of going up the mould sword piece all is equipped with cuts into the sword piece, be equipped with the position cotter hole on going up the mount pad of mould sword piece, it is the wave curved surface to cut into the sword piece, it evenly is provided with and cuts into the cusp to cut into the curved surface top of sword piece.

In the scheme, one side of the top of the cutting-in tool block is provided with a falling facet, the falling facet is an inclined plane, the other side of the top of the cutting-in tool block is provided with a dragging tool face, the dragging tool face is an arc face, and the bottom of the cutting-in sharp point is provided with a secondary cutting-out face.

In the above scheme, the cyclic distance between two adjacent wave bands of the cutting knife block is 250 mm.

In the scheme, the difference value between the curved surface peak value and the valley of the cutting-in cutter block ranges from 4mm to 9 mm.

Compared with the prior art, the invention has the beneficial effects that: the original trimming die trimming process is that a trimming blade and a plate are in line contact and simultaneously cut, and the trimming force is L (line length) X (point trimming force). The cutting-in cutter block of the upper mould cutter block is set to be a wave curved surface, the top of the curved surface of the cutting-in cutter block is provided with a cutting-in sharp point, the most original line contact trimming is changed into progressive point contact, and the trimming force is equal to X (point trimming force), so that the peak value number of the trimming force can be greatly reduced, the instant peak value is avoided, the noise and vibration during the shearing of the upper cutter block and the lower cutter block are reduced, the market requirements are met, and a good mould stamping operation production environment is maintained.

Drawings

FIG. 1 is a schematic view of process forces during mold movement;

FIG. 2 is an elevational view of the overall construction of the present invention;

FIG. 3 is a top view of the overall structure of the present invention;

FIG. 4 is a schematic view of a structure of a cutting-in block according to the present invention;

FIG. 5 is a schematic structural diagram illustrating an implementation state of the present invention;

fig. 6 is a schematic structural view of a cutting-in tool block according to the present invention.

The reference numbers in the figures: 1-cutting in a cutter block; 2-a waste ejection pin; 3-locking screw holes; 4-position pin holes; 5-marking the steel printing surface; 6-bridge spanning marking; 7-reinforcing ribs; 9-upper die cutter block; 10-waste material cutter; 11-faceting down; 12-a rake face; 13-cutting into a sharp point; 14-secondary gap drawing surface; 16-waste feeding knife.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in figures 2 and 3, the noise-reducing and shock-absorbing cutter block for the trimming die of the automobile panel comprises an upper cutter block 9, wherein the working surface of the upper cutter block 9 is provided with a cutting-in cutter block 1, the cutting-in cutter block 1 is a wavy curved surface, so that the upper cutter block and the lower cutter block are in contact with each other to form point contact when being sheared, the difference range between the curved surface peak value and the valley of the cutting-in cutter block 1 is 4-9 mm, namely the feeding amount of the trimming die is 4-9 mm. The circulating distance between wave bands on two adjacent cutting-in cutter blocks 1 is 250mm, and curved surfaces of 4mm, 6mm and 9mm can be selected for periodic circulation.

As shown in fig. 4, a relief surface 11 is arranged on one side of the top of the cutting block 1, and the relief surface 11 is a slope surface for reducing the contact area with the plate to be punched; a dragging tool face 12 is arranged on the other side of the top of the cutting tool block 1, and the dragging tool face 12 is an arc surface and is used for auxiliary machining and auxiliary forming of a shearing face of a plate; the bottom of the cutting sharp point 13 is provided with a secondary clearance surface 14 for reducing grinding and processing.

The top of the curved surface of the cutting-in cutter block 1 is uniformly provided with cutting-in sharp points 13, which is convenient for weakening the noise generated when the upper mould cutter block 9 is sheared in contact with the upper mould cutter block. The original trimming die trimming process is that a trimming blade and a plate are in line contact and simultaneously cut, and the trimming force is L (line length) X (point trimming force). The cutting sharp point 13 is arranged at the top of the curved surface of the cutting knife block 1, the most original line contact trimming is changed into progressive point contact, and the trimming force is equal to X (point trimming force), so that the peak value number of the trimming force can be greatly reduced, the instant generation of peak values is avoided, and the noise and the vibration during the shearing of the upper and lower knife blocks are reduced.

The mounting seat of the upper die cutter block 9 is provided with a position pin hole 4 for accurately fixing the upper die cutter block 9 on the upper die seat. The mounting seat of the upper die cutter block 9 is also provided with a waste ejection pin 2 and a locking threaded hole 3 for positioning the cutter block on the die holder. In order to distinguish conveniently, can also print mark steel seal face 5 and stride bridge mark 6 on the mount pad, mark steel seal face 5 is used for finding this sword piece fast when making things convenient for the dismouting, strides bridge mark 6 and is used for the sign clamp plate to stride the bridge from this sword piece. In order to improve the strength of the cutting-in cutter block 1 in the punching and shearing process, a plurality of reinforcing ribs 7 are arranged at the position, close to the cutter face, of the cutting-in cutter block 1, and the wall thickness of each reinforcing rib 7 is 40 mm.

The cutting-in knife block 1 is arranged on the top of the upper die knife block 9, a cutting-in sharp point 13 is arranged on the top of the curved surface of the cutting-in knife block 1, when the lower die is in reference, the difference range between the peak value and the valley of the curved surface of the cutting-in knife block 1 is 4-9 mm, and the trimming and inserting amount can be selected from 4mm, 6mm and 9mm to perform periodic cycle on the curved surface of 250 mm. When the die is aligned, the difference value between the curved surface peak value and the valley of the cutting knife block 1 ranges from 4 to 9+ tmm, and the trimming cut-in amount is made to be 4+ tmm, 6+ tmm and 9+ tmm, wherein t is the wall thickness of the plate.

In order to avoid interference between the upper tool block 9 and the waste tool during shearing, as shown in fig. 5, a distance d between the top of the lower waste tool 10 and the upper waste tool 16 is ≧ t +0.5mm, where t is the thickness of the plate. As shown in fig. 6, the cutting-in block 1 on the top of the upper die block 9 is a curved surface, and a plurality of periodic and cyclic cutting-in sharp points 13 are arranged on the curved surface. Wherein 13a is a 4mm intake, 13b is a 6mm intake, and 13c is a 9mm intake, and the cyclic curve period gradual change is obtained from 13a to 13b, and the cyclic curve period gradual change is obtained from 13b to 13 c. The peak value of the curved surface is 9mm at most, the cutting-in cutter block 1 is also used as a cutting-in point, point contact is formed on the plate, and then the curved surface is trimmed progressively until waste materials are sheared from the body of the part.

During implementation, the upper die base is opened, the plate is conveyed into the die, the upper die base moves downwards along with the hydraulic machine, the guide post is in guide sleeve connection, then the die begins to be guided, and then the material pressing plate presses the material. The upper die cutter block 9 and the lower die cutter block start point contact, trimming is carried out progressively until the waste material is sheared from the part body, the waste material falls on the lower waste material cutter 10, the waste material is cut by the upper waste material cutter 16 and the lower waste material cutter 10, finally the die is opened, the plate is ejected by the material supporting frame, and the plate is taken out to complete a stamping and shearing process.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a car panel deburring mould is with noise reduction and shock attenuation sword piece, includes mould sword piece (9), the working face of going up mould sword piece (9) all is equipped with cuts into sword piece (1), be equipped with position cotter hole (4), its characterized in that on the mount pad of mould sword piece (9): the cutting-in cutter block (1) is a wave curved surface, and cutting-in sharp points (13) are uniformly arranged on the top of the curved surface of the cutting-in cutter block (1);

the incision cusp (13) comprises a first intake (13a), a second intake (13b) and a third intake (13c), wherein the first intake (13a) to the second intake (13b) are obtained by cyclic gradual change of a curved surface period, and the second intake (13b) to the third intake (13c) are obtained by cyclic gradual change of a curved surface period.

2. The noise-reducing and shock-absorbing cutter block for the trimming die of the automobile panel as claimed in claim 1, wherein: the top one side of cutting into sword piece (1) is equipped with and falls facet (11), it is the inclined plane to fall facet (11), the top opposite side that cuts into sword piece (1) is equipped with drags knife face (12), drag knife face (12) to be the cambered surface, the bottom that cuts into cusp (13) is equipped with the secondary and draws out a clearance face (14).

3. The noise-reducing and shock-absorbing knife block for the trimming die of the automobile panel as claimed in claim 1, characterized in that: the circulating distance between two adjacent wave bands of the cutting-in cutter block (1) is 250 mm.

4. The noise-reducing and shock-absorbing cutter block for the trimming die of the automobile panel as claimed in claim 1, wherein: the difference range between the curved surface peak value and the valley of the cutting-in cutter block (1) is 4-9 mm.