CN202045304U

CN202045304U - Core cutter structure for spring coiling machine

Info

Publication number: CN202045304U
Application number: CN 201020678308
Authority: CN
Inventors: 张耀; 葛惠民; 王晓虎; 黄文广; 吴兴; 程文峰
Original assignee: Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
Current assignee: Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
Priority date: 2010-12-24
Filing date: 2010-12-24
Publication date: 2011-11-23
Anticipated expiration: 2020-12-24

Abstract

The utility model discloses a core cutter structure for a spring coiling machine, which comprises a core cutter head and a cutter head seat, wherein the core cutter head is connected with the cutter head seat, the lateral side of the core cutter head is provided with a smooth cutter falling surface, the core cutter head is formed by pasting an upper core cutter head and a lower core cutter head, the cutter head seat is formed by pasting an upper cutter head seat and a lower cutter head seat, respective pasting surfaces of the core cutter head and the cutter head seat are positioned on the same horizontal plane, the upper core cutter head and the upper cutter head seat are formed into a whole, the root of the upper core cutter head and the upper cutter head seat realize the transition through a circular arc, and the lower core cutter head and the lower cutter head seat are formed into a whole. The core cutter structure for the spring coiling machine adopts a measure of changing the sharply changed point part into the circular arc transition structural characteristic, the structure capable of generating stress concentration is eliminated, the stress distribution at the root of the core cutter head is improved, the integral core cutter structure is changed into a split core cutter structure, the appearance of components is improved, the intensity of the lower core cutter body is enhanced, and the lower core cutter body bears and balances the deformation and the stress generated through the stress of the upper core cutter body, so the core cutter head is not easy to fracture, and the service life of a core cutter is prolonged.

Description

Wind spring movement knife structure

Technical field

The utility model relates to a kind of spring coiling machine production equipment, especially a kind of wind spring movement knife structure.

Background technology

The Digital Control Plane Roll-up Spring machine adopts wire feed rolls to send steel wire, treat spring roll finish after, steel wire need be cut off to roll next spring on the core cutter.Fig. 1,2 is the structure chart of present used core cutter, core cutter and cutoff tool position view when Fig. 3 is cut-out.The core cutter is motionless during cut-out, and cutoff tool down moves, and utilizes shearing force to cut off steel wire.The ability that the Digital Control Plane Roll-up Spring machine is produced spring is approximately 100/minute, and core cutter per minute will be subjected to the cut-out impulsive force load about 100 times thus.

There is easily broken problem in the core cutter head of minor diameter at present, and with reference to Fig. 1,2, reason is: at first the core tool bit diameter is less, intensity surplus deficiency; Secondly core cutter head root is connected with the conical structure of core cutter, and the rigidity of conical structure is better, and when cutoff tool cut off steel wire, the force structure of core cutter head was the cantilever beam force structure, and the maximum stress position is at the root of core cutter head; Once more, the core cutter head adopts turning processing, cone adopts emery wheel to grind, the two connect the root that the cutter position is positioned at the core cutter head, form stress and concentrated serious rapid variation wedge angle position, under the effect of long-term alternate load, cracked tendency, alternate load progressively enlarges crackle, and member section constantly weakens; Intensity surplus deficiency, maximum stress effect add the effect of crackle tendency, and under overload was once in a while impacted, unexpected brittle fracture will take place the core cutter, and therefore, the service life of core cutter is shorter.

Summary of the invention

The purpose of this utility model is a kind of long service life that designs for the deficiency that solves above-mentioned technology, not easily broken wind spring movement knife structure.

The wind spring movement knife structure that the utility model is designed, comprise core cutter head and tool tip, the core cutter head links to each other with tool tip, there is a smooth roll setting face side of described core cutter head, described core cutter head is fitted by last core cutter head and following core cutter head and is constituted, described tool tip is fitted by last tool tip and following tool tip and is constituted, and core cutter head and tool tip binding face separately is on same horizontal plane; Last core cutter head and last tool tip are one, and last core cutter head root and last tool tip are by arc transition, and following core cutter head is an one with following tool tip.

In order to make down the core cutter hub accept and offset the distortion and the stress of the stressed generation of core cutter hub better, as preferably, described to go up the core cutter hub be right angle circular arc piece shape, and its side comprises two orthogonal planes and an arc surface; Described core cutter head down is a trapezoid platform with a right ang shape, and its side comprises three planes perpendicular to each other and an inclined-plane; Described arc surface up, described inclined-plane is down.

In order further to improve load-carrying properties, as preferably, described to go up the core cutter head identical with following core cutter head binding face shape, described on the binding face shape of tool tip and following tool tip also identical.

As preferably, the inclined-plane of described core cutter head down joins with the bottom surface of following tool tip.

As preferably, described roll setting face is concordant with the tool tip side.

The wind spring movement knife structure of the utility model gained compared with prior art will sharply change the measure that the wedge angle position changes the arc transition architectural feature into, has eliminated to produce the structure that stress is concentrated; Change the conical stiffness feature into the circular arc flexible characteristic, improved the stress distribution of core cutter head root; Change the integral core knife structure into split type core knife structure, improve the member profile, strengthen the intensity of core cutter hub down, make by following core cutter hub and accept and offset distortion and the stress of going up the stressed generation of core cutter hub; Thereby make not frangibility of core cutter head, prolong the core cutter life-span.

Description of drawings

Fig. 1 is the front view of existing core cutter;

Fig. 2 is the left view of existing core cutter;

Fig. 3 is core cutter and a cutoff tool position view when cutting off in the prior art;

Fig. 4 is the front view of embodiment 1 wind spring movement knife structure;

Fig. 5 is the left view of embodiment 1 wind spring movement knife structure;

Fig. 6 is the front view of core cutter head and last tool tip on the embodiment 1;

Fig. 7 is the left view of core cutter head and last tool tip on the embodiment 1;

Fig. 8 is the front view of 1 time core cutter head of embodiment and following tool tip;

Fig. 9 is the left view of 1 time core cutter head of embodiment and following tool tip;

Among the figure: core cutter head 1, tool tip 2, roll setting face 3, go up core cutter head 4, down core cutter head 5, go up tool tip 6, tool tip 7, circular arc 8, arc surface 9, inclined-plane 10, spring 11, conical structure 12, cutting knife 13 down.

The specific embodiment

The utility model will be further described in conjunction with the accompanying drawings below by embodiment.

Embodiment 1:

As shown in Figure 1, the described wind spring movement of present embodiment knife structure, comprise core cutter head 1 and tool tip 2, core cutter head 1 links to each other with tool tip 2, there is a smooth roll setting face 3 side of core cutter head 1, core cutter head 1 is fitted by last core cutter head 4 and following core cutter head 5 and is constituted, and tool tip 2 is fitted by last tool tip 6 and following tool tip 7 and constituted, and core cutter head 1 and tool tip 2 binding face separately are on same horizontal plane; Last core cutter head 4 is an one with last tool tip 6, and last core cutter head 4 roots and last tool tip 6 are by circular arc 8 transition, and following core cutter head 5 is an one with following tool tip 7.Wherein, last core cutter hub is a right angle circular arc piece shape, and its side comprises two orthogonal planes and an arc surface 9; Following core cutter head 5 is a trapezoid platform with a right ang shape, and its side comprises three planes perpendicular to each other and an inclined-plane 10, and this inclined-plane 10 joins with the bottom surface of following tool tip 7; Arc surface 9 is used for support spring 11 up when cutting off, inclined-plane 10 down, supporting force is stronger, the applying trailing flank has formed burnishing surface and has been roll setting face 3, this roll setting face 3 is concordant with tool tip 2 sides, last core cutter head 4 is identical with following core cutter head 5 binding face shapes, and the binding face shape of last tool tip 6 and following tool tip 7 is also identical.

The described wind spring movement of present embodiment knife structure, increases flexible characteristic, changes stress distribution and changes the measure of member profile the concentrating structure of having taked to eliminate stress.

At first, changed the integral core knife structure into split type core knife structure, at last, the different loading characteristics of following two parts carry out structural design respectively, structural strength to following core cutter hub strengthens, changed existing semicylinder structure into the bucking ladder structure, improved the member profile, the purpose of change is to strengthen the rigidity of the latter half, after making the stressed generation distortion of core cutter hub, the distortion of core cutter hub can be accepted and offset to following core cutter hub, reduced the internal stress of last core cutter hub, thereby it is stressed to have changed the cantilever beam force structure of core cutter head 1 into top, the multi-point support structure of lower support;

Secondly, the conical structure 12 that will have wedge angle jumpy position changes circular arc 8 transition into, but time processing is shaped, eliminated and produced the horn structure that stress is concentrated, thereby eliminated the phenomenon that local stress seriously increases, make that core cutter head 1 root can not crack tendency under the effect of long-term alternate load;

Once more, change the conical stiffness feature into circular arc 8 transition structures, increased the flexible structure feature, make circular arc 8 structure positions to produce slight deformation along with core cutter head 1, avoid the maximum stress zone to be positioned at the root of core cutter head 1, improve original core cutter head 1 cantilever beam force structure, improved the stress distribution at core cutter head 1 root position.

Because the improved force-bearing situation and the force structure of core cutter head 1 of these aspects, thereby make not frangibility of core cutter head 1, the significant prolongation core cutter life-span.

Claims

1. wind spring movement knife structure, comprise core cutter head and tool tip, the core cutter head links to each other with tool tip, there is a smooth roll setting face side of described core cutter head, it is characterized in that described core cutter head is made of last core cutter head and the applying of following core cutter head, described tool tip is fitted by last tool tip and following tool tip and is constituted, and core cutter head and tool tip binding face separately is on same horizontal plane; Last core cutter head and last tool tip are one, and last core cutter head root and last tool tip are by arc transition, and following core cutter head is an one with following tool tip.

2. wind spring movement knife structure according to claim 1 is characterized in that described upward core cutter hub is a right angle circular arc piece shape, and its side comprises two orthogonal planes and an arc surface; Described core cutter head down is a trapezoid platform with a right ang shape, and its side comprises three planes perpendicular to each other and an inclined-plane; Described arc surface up, described inclined-plane is down.

3. wind spring movement knife structure according to claim 2 is characterized in that described last core cutter head is identical with following core cutter head binding face shape, and the binding face shape of described upward tool tip and following tool tip is also identical.

4. wind spring movement knife structure according to claim 3 is characterized in that the inclined-plane of described core cutter head down and the bottom surface of following tool tip join.

5. according to claim 1 or 2 or 3 or 4 described wind spring movement knife structures, it is characterized in that described roll setting face is concordant with the tool tip side.