Restoration of knife of clip of machining center milling head transforms door of numerical control dragon

Transform the setting development as modern technology, automation treatment already made contemporary industry main trend. Good structural performance already became the main target of the product, milling head is the core accessory of product of mill boring machine. At the beginning of 2015, milling head of right angle of machining center accessory places the door of numerical control dragon that as a result of me the company manufactures lever of the piston after the knife and push broach lever cannot effective restoration, milling head of right angle of the accessory when bringing about a machine tool to machine is automatic job of orgnaization of loose, broach is fluky, cannot develop milling head of accessory right angle adequately to machine medium action in automation. Below this kind of circumstance, the designing institute held water " the restoration placing a knife of milling head of right angle of accessory of milling machine of boring of door of numerical control dragon is transformed " group. The group becomes an actual measurement spot, finished transform a project. 2.

The loose knife structure of milling head of right angle of machining center accessory is the door of numerical control dragon that the current situation analyses my company to produce hydraulic pressure loose knife, broach structure is dish reed taut (see a picture 1) . Milling head of accessory right angle loosens automatically knife structure is shown 2 times like the graph. When loose knife, piston lever is extended below the action of pressure oil, with push broach lever osculatory hind overcomes dish reed force to move ahead, realize automatic pine knife. When placing a knife, piston lever is there is towards the left to move by push broach lever below the action in dish reed, after reaching the designated position, still contact to avoid both, used bedspring restoration and technology of pneumatic crock restoration, but the effect when applying actually is very flabby calm, the restoration force of air cylinder thrust and bedspring cannot overcome hydraulic pressure to return the attrition power of the weather strip on oily obstruction and piston lever well, the consequence of generation is to be in piston lever and push broach lever not the main shaft below come away circumstance rotates, bring about a piston to lever and interface of push broach lever chafe and grind close together. Graph 1 graph 23.

When transforming milling head of target accessory right angle to place knife condition certainly, realize piston lever and the reliable depart that push arbor, finish according to this transform. 4.

The member that the analysis brings about the main factor group of this phenomenon to become is opposite through machining the spot for many times of milling head of accessory right angle disassemble, undertake if subordinate list place is shown,influencing factor is analysed. In carry out before transforming, need to make a thorough investigation of the reason that generates high back pressure. The course experiments for many times, discuss and analyse, its are main the reason has the following 3 respects: (1) door of numerical control dragon machining center is heavy-duty machine tool, the high size of the machine tool is larger, the oil inside vitta uses next meetings to generate greater pressure in heavy master piece. (2) the pipeline of system of whole hydraulic pressure passes many towline, because towline is bent again,grow again, the pressure loss that causes pipeline is very big. (3) the installation of group of a powerful person on main shaft box is in same on substrate, its answer oil come true through a pipeline, an oily mutual influence of group of each a powerful person. 5.

Executive plan is aimed at above reason, we adopted transform program accordingly: (1) the pipeline answering oil that configures independence, the group of a powerful person that will control crock of hydraulic pressure of loose knife of milling head of accessory right angle and group of other a powerful person are separate, avoid mutual effect. (2) add the crude pipeline that answer oil, reduce loss of the pressure that answer oil. (3) the means discharging cloth of the pipeline in optimizing towline. (4) a spring raises in return spring interior, in order to enhances bedspring restoration power. (5) when placing a knife, PLC program defer 4 ｓ of 3 ～ , let road of hydraulic pressure earthen pipe enough time discharge removes pressure. 6.

Transform a result to pass a test, milling head of accessory right angle answers vitta road back pressure from 0.

6MPa falls to 0.

1MPa left and right sides, piston lever and end panel of push broach lever realized reliable depart, obtained the 2mm clearance that produces design technology demand. This is transformed in door of dragon of much stage numerical control the test has on milling head of machining center accessory, transform the effect good. Bibliographical reference: [1] Wang Kai.

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Unit: Qiqihaer group of 2 machine tools is narrow duty author: Yu Xin CNC Milling