Mechanical production technology - numerical control process designing is special design

637GPa, when getting the materials ready, already used curium paragraph of makings of corresponding length, semifinished product in length direction two end panel leave 1mm mental allowance each; Semifinished product compares a spare parts in the dimension of diametical direction much 4 ~ 5mm of measure of department of the biggest diameter (namely the smallest part makes an appointment with the unilateral mental allowance of diametical direction 2~ 2.

5mm) . Part drawing and technology ask plan institute is shown as follows; Production lot is small lot. Requirement: Answer in referred design report in proportion plot, the design explains under hand-in-hand travel: 1, program of certain treatment technology, make craft line; The position holding clip when plot expresses to install clip to machine every time, cutting tool takes the spare parts form after cutter track line, treatment; 2, logical choice machine tool, cutting tool, scale gives cutting tool arrange a plan, undertake necessary specification; 3, wait for an element according to workpiece material, cutting tool material, machine tool, pass computation, dosage of logical choice cutting; (at least with a rough machining / or situation of finish machining labor is exemple, demonstrative cutting dosage is calculated process) 4, have the consideration such as dimension of value of coordinate of position of each base point, whorl according to part drawing, write the CNC Machining program of each working procedure next; Process designing should reasonable and correct, the program writes clarity complete, try essential explanatory note. 5, bibliographical reference provenance should indicate when citing; Make clear bibliographical reference finally (include name of author, document, press or periodical name, publication time) . One, technology of part drawing of analysis of treatment technology program asks to analyse this spare parts by outside face of columnar face, end panel, circular arc, outside whorl and the exterior composition such as the chamfer that retreat a knife among them radial dimension has more expensive measure precision and requirement of exterior surface roughness, radius is used to amend a statement when process designing so. The place that has noncombatant duty uses median process designing. Working procedure differentiates dimension of this part semifinished product is, the smallest part makes an appointment with the unilateral mental allowance of diametical direction 2mm, length direction two end panel each 1mm mental allowance. Treatment needs to turn around, use clip of 3 ungual chuck to hold workpiece one aspect of the matter to achieve right end of the workpiece that finish first thick, finish machining of the surface, turn around again clip holds spare parts right end to already machined the surface, the treatment of round face outside the Mm that finish. The means that hold clip chooses to use clip of clamping apparatus of 3 ungual chuck to hold workpiece to walk along cutter track line to design process one: From centering chuck clip holds car of one aspect of the matter of work semifinished product to carry car of the circle outside vehicle of thick, fine to retreat knife chamfer working procedure of whorl of vehicle of thick, fine 2: Turn around use from centering chuck clip to hold exterior car right end panel already was machined on the right side of workpiece the car of spare parts appearance after the circle outside Che Youduan of thick, essence cancels the spare parts appearance after each working procedure machine the circle outside Mm of thick, fine vehicle the spare parts appearance after knife chamfer is thick, . According to foregone condition, the smallest part makes an appointment with unilateral surplus 2.

5mm, reason choosing. Choose feed. Check watch 1-13, take. Choose cutting career. Workpiece material is 45 steel, by the watch 1-18 is known, at that time, take. The cutting dosage when fine vehicle chooses to bear amount of penetration of a cutting tool. Take. Choose feed. By the watch 1-16 is known, ra=1.

6, , take. Choose cutting career. Workpiece material is 45 steel, by the watch 1-18 is known, at that time, , take but. 4, coordinate of position of each base point is worth outline of spare parts Zun Duan to machine base point on numeric computation spare parts 2.

The spare parts is right dimension of whorl of center of upright outline treatment is worth 5, machine program of outline of Zun Duan of part of order of work out CNC Machining. Before be being machined automatically, on the offensive moves end to face a knife. Machine program of outline of spare parts Zun Duan. Before be machined automatically, need to be opposite afresh knife. 6, design summary finishs what give the CNC Turning of the spare parts machine program to place to write through the analysis, deepened the understanding of the academic knowledge that learns to the place in CNC Machining course, also contacted the partial content that learns in base of mechanical production technology. The treatment technology program that analyses the part that the design wants to machine through oneself, complete the selection of particular machine tool, cutting tool, and the process designing of CNC Machining program, the knowledge that real ground is applied in practice and consolidated the place in classroom is acquired. Of the computation that the inadequacy of existence is cutting dosage and choice and program write main reference the example in teaching material, to these content control ground returns insufficient adroitness. CNC Milling CNC Machining