阅读说明：本技术 一种大角度渐进成形平头转动工具头 (A kind of wide-angle progressive molding tack turning tool head ) 是由 王辉 光凯惠 姚运飞 吴田莉 刘斌斌 于 2019-07-23 设计创作，主要内容包括：本发明公开了一种大角度渐进成形平头转动工具头,包含工具杆和转动工具头；工具杆上端连接数控渐进机床主轴,下端呈倒立的圆锥台形、且下端底面的中心设有螺纹孔；转动工具头包含转动刀头、刀头套与刀芯。与现有技术相比,本发明使将传统渐进成形工具头成形时与板料的滑动摩擦转变为滚动摩擦,使成形角度增大,成形质量大大提升,进一步扩大了渐进成形的应用范围。(The invention discloses a kind of wide-angle progressive molding tack turning tool heads, include tool bar and turning tool head；Tool bar upper end connects the progressive machine tool chief axis of numerical control, and lower end is equipped with threaded hole in the center of the truncated cone and lower end bottom surface that stand upside down；Turning tool head includes rotation blade, tool bit casing and knife core.Compared with prior art, when the present invention makes to shape traditional progressive molding tool heads and the sliding friction of plate is changed into rolling friction, increases shape angles, forming quality greatly promotes, the further expansion application range of progressive molding.)

1. a kind of wide-angle progressive molding tack turning tool head, which is characterized in that include tool bar (1) and turning tool head (2)；

Tool bar (1) upper end connects the progressive machine tool chief axis of numerical control, and lower end is in the truncated cone and lower end bottom surface to stand upside down The heart is equipped with threaded hole；

The turning tool head (2) includes rotation blade (3), tool bit casing (5) and knife core (6)；

The knife core (6) includes interconnecting piece and fixed part, wherein the fixed part includes upper prop and lower prop, the upper prop, lower prop It is cylindrical body, and upper column diameter is less than lower column diameter, the lower end of upper prop and the upper end of lower prop are connected；The interconnecting piece is cylinder Body, the screw thread that side wall upper part is equipped with and the corresponding threaded holes close, and the lower end of interconnecting piece and the lower end of the upper prop are connected； The interconnecting piece, upper prop, lower prop are coaxial；

The upper surface of the rotation blade (3) is equipped with the groove to match with the fixed part of the knife core (6), covers in knife core (6) Fixed part on；The tool bit casing (5) is the hollow cylinder that upper surface center is equipped with through-hole, lower ending opening, the upper end surface cover Outside the upper prop, sidewall sheath is interference fitted with rotation blade (3) outside in the rotation blade (3)；The tool bit casing (5) Between upper surface and the upper surface of the lower prop, gap is formed between rotation blade (3) and the lower prop, and is filled in the gap The equally distributed ball of single layer (4)；

The interconnecting piece of the knife core (6) and the threaded hole of the tool bar (1) are threadedly coupled, so that the rotation of rotation blade (3) Axis is overlapped with the central axes of tool bar (1).

2. wide-angle progressive molding tack turning tool head according to claim 1, which is characterized in that the knife core (6) Two sides of the interconnecting piece below its screw thread be equipped with symmetrical spanner slot.

3. wide-angle progressive molding tack turning tool head according to claim 1, which is characterized in that in the gap It is lubricated between ball using lubricating fluid.

Technical field

The present invention relates to mechanical engineering field more particularly to a kind of wide-angle progressive molding tack turning tool heads.

Background technique

Progressive molding is the flexible processing method of metal blank three-dimensional curve generation, can be realized Digitized manufacturing.Usually The tool heads used in progressive molding are integral tool head, and end is spherical shape, when forming at tool heads and plate In sliding friction state, therefore tool head surface is prone to wear, and sheet forming accuracy decline, required forming force is caused to increase, The surface of formation of parts is easy to produce scratch defects simultaneously.Integral replacing is needed after tool heads abrasion, since tool heads use work Has the higher material manufacture of the hardness such as steel or steel alloy, also, the requirement on machining accuracy of its end spherical surface is higher, difficulty of processing Greatly, therefore replacement is particularly difficult.

Jilin University Lee understand philosophy devise progressive molding Roll tool head (patent No.: 201010030832), use Rolling friction replace sliding friction improve surface quality, the Lu Bin of Shanghai Communications University devise formable wide-angle it is progressive at Shape Roll tool head (patent No.: CN201210028809.6), but these designs are all bulb tool heads, when forming, easily go out Existing bulge phenomenon, is not suitable for the forming of the sheet metal component more demanding to surface smoothness, and shape angles are limited, limit The application range of progressive molding.

Summary of the invention

The technical problem to be solved by the present invention is to provide a kind of wide-angle for defect involved in background technique Progressive molding tack turning tool head.

The present invention uses following technical scheme to solve above-mentioned technical problem:

A kind of wide-angle progressive molding tack turning tool head includes tool bar and turning tool head；

The tool bar upper end connects the progressive machine tool chief axis of numerical control, and lower end is in the truncated cone to stand upside down and the center of lower end bottom surface Equipped with threaded hole；

The turning tool head includes rotation blade, tool bit casing and knife core；

The knife core includes interconnecting piece and fixed part, wherein the fixed part includes upper prop and lower prop, and the upper prop, lower prop are equal For cylindrical body, and upper column diameter is less than lower column diameter, and the lower end of upper prop and the upper end of lower prop are connected；The interconnecting piece is cylinder Body, the screw thread that side wall upper part is equipped with and the corresponding threaded holes close, and the lower end of interconnecting piece and the lower end of the upper prop are connected； The interconnecting piece, upper prop, lower prop are coaxial；

The upper surface of the rotation blade is equipped with the groove to match with the fixed part of the knife core, covers the fixed part in knife core On；The tool bit casing is the hollow cylinder that upper surface center is equipped with through-hole, lower ending opening, and the upper end surface cover is in the upper prop Outside, sidewall sheath is interference fitted outside the rotation blade with rotation blade；The upper surface of the tool bit casing and the lower prop it is upper Between end face, gap is formed between rotation blade and the lower prop, and the equally distributed ball of single layer is filled in the gap；

The interconnecting piece of the knife core and the threaded hole of the tool bar are threadedly coupled, so that the pivot center and tool of rotation blade The central axes of bar are overlapped.

As the further prioritization scheme of a kind of wide-angle progressive molding tack turning tool head of the invention, the knife core Two sides of the interconnecting piece below its screw thread are equipped with symmetrical spanner slot.

As the further prioritization scheme of a kind of wide-angle progressive molding tack turning tool head of the invention, in the gap Ball between be lubricated using lubricating fluid.

The invention adopts the above technical scheme compared with prior art, has following technical effect that

Compared with prior art, the present invention replaces sliding friction mode that can improve forming surface matter using rolling friction mode Amount；The present invention uses tack turning tool head, can improve and easily occur bulge phenomenon in progressive molding, surface smoothness is lower existing Shape；Furthermore nearly 85 ° of the sheet metal parts of maximum forming angle can be shaped, substantially increase the angular range of forming, further expansion The application range of progressive molding.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of wide-angle progressive molding tack turning tool head of the present invention；

Fig. 2 is a kind of cutaway view Amplified image of wide-angle progressive molding tack turning tool head of the present invention；

Fig. 3 (a), Fig. 3 (b) be respectively cross-section diagram at knife core upper ejector lever slot, on knife core somewhere cross-section diagram；

Fig. 4 is the part schematic diagram that nearly 85 ° of angle is shaped using inventive article head.

In figure, 1- tool bar, 2- progressive molding tack turning tool head, 3- rotation blade, 4- ball, 5- tool bit casing, 6- Knife core.

Specific embodiment

Technical solution of the present invention is described in further detail with reference to the accompanying drawing:

The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providing These embodiments are thoroughly and complete to make the disclosure, and will give full expression to the scope of the present invention to those skilled in the art. In the accompanying drawings, for the sake of clarity it is exaggerated component.

As depicted in figs. 1 and 2, the invention discloses a kind of wide-angle progressive molding tack turning tool heads, include tool Bar and turning tool head；

The tool bar upper end connects the progressive machine tool chief axis of numerical control, and lower end is in the truncated cone to stand upside down and the center of lower end bottom surface Equipped with threaded hole；

The turning tool head includes rotation blade, tool bit casing and knife core；

The knife core includes interconnecting piece and fixed part, wherein the fixed part includes upper prop and lower prop, and the upper prop, lower prop are equal For cylindrical body, and upper column diameter is less than lower column diameter, and the lower end of upper prop and the upper end of lower prop are connected；The interconnecting piece is cylinder Body, the screw thread that side wall upper part is equipped with and the corresponding threaded holes close, and the lower end of interconnecting piece and the lower end of the upper prop are connected； The interconnecting piece, upper prop, lower prop are coaxial；

The upper surface of the rotation blade is equipped with the groove to match with the fixed part of the knife core, covers the fixed part in knife core On；The tool bit casing is the hollow cylinder that upper surface center is equipped with through-hole, lower ending opening, and the upper end surface cover is in the upper prop Outside, sidewall sheath is interference fitted outside the rotation blade with rotation blade；The upper surface of the tool bit casing and the lower prop it is upper Between end face, gap is formed between rotation blade and the lower prop, and the equally distributed ball of single layer is filled in the gap；

The interconnecting piece of the knife core and the threaded hole of the tool bar are threadedly coupled, so that the pivot center and tool of rotation blade The central axes of bar are overlapped.

Two sides of the interconnecting piece of the knife core below its screw thread are equipped with symmetrical spanner slot.

Forming process for taper sheet metal parts the following steps are included:

1) knife rail is generated using layer scan method；

2) plate is fixed on on the workbench of Metal CNC Incremental Forming lathe simultaneously flanging, the feed speed and main shaft of numerically-controlled machine tool Revolving speed percentage is set to 100% and 100% respectively；

4) tack turning tool head is installed, initial ramp is towards on the outside of female part；

5) start Metal CNC Incremental Forming lathe, the moment pays attention to Roll tool head situation at a distance from part wall, makes turning tool head Always it is directed toward the outer method phase of part, completes forming；

6) after the completion of shaping, tool heads is lifted, plate is removed.

Tool bar uses tool steel or alloy steel making, and section is circle, and one end is plane, with progressive molding lathe master Axis connection, the other end are truncated cone, have threaded hole among circular cone countertop, for connecting the tool heads of different size.

Rotation blade uses hard alloy, and surfaces externally and internally all passes through intensive treatment, and hardness is high, wear-resistant；Ball is using mark Quasi- high-quality bearing ball, it is desirable that its precision is good, hardness is big；Tool bit casing is manufactured using Cu alloy material, is connect with rotation blade Part be interference fitted, with knife core by ball roll cooperate, cutter head sets of holes internal diameter be less than knife core outer diameter and be greater than knife core outer diameter and The sum of ball bearing radius can guarantee that tool bit casing is freely rotated with rotation blade and ball will not roll out in this way, and this gap also can be used In addition lubricating oil；Knife core outer surface passes through intensive treatment, and hardness is high, wear-resistant.

Fig. 3 (a) is the cross-section diagram at knife core upper ejector lever slot, simple and direct using spanner toward handling turning tool head on tool bar It is convenient.Fig. 3 (b) is the cross-section diagram in somewhere on knife core, fills a certain number of balls between rotation blade and knife core, ball it is straight Diameter is equal to the difference of rotation blade internal diameter and knife core outer diameter, and quantity is advisable to cut three to five balls after completely filling out, if Ball completely fills out, and be easy to cause ball-recirculation unsmooth, and ball loads very few this and be easy to cause the very few generation office of stress ball Portion's unbalance loading keeps part ball stress excessive and damages；It is lubricated between ball using lubricating fluid, reduces ball, rotation blade With the abrasion between knife core.

Fig. 4 is the part schematic diagram that nearly 85 ° of angle is shaped using inventive article head, for relatively spherical tool heads, Flat head tool head can improve tool heads and plate contact condition, reduce forming force, be less prone to bulge phenomenon, formation of parts Surface smoothness is higher.

Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.

Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention Protection scope within.