Constant Scallop-height Machining of Free-form Surfaces

Suresh, K.; Yang, Daniel C. H.

doi:10.1115/1.2901938

Cited by 249 publications

(101 citation statements)

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“…Research on the kinematics of three-and five-axis CNC machining Yang, 1991 and1992) has improved the efficiency of machining operations. Other investigations shared similar goals (Philpot et al, 1995;Suresh and Yang, 1994;Vichers and Quan, 1986;Wang et al, 1987; Ehmann, 1989 andOliver, 1992;Oliver and Goodman, 1990;Oliver et al, 1993).…”

Section: Introductionmentioning

confidence: 81%

Efficiency of Multi-Axis NC Machining of Sculptured Part Surfaces

Radzevich

Goodman

1999

Machining Impossible Shapes

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Abstract:The efficiency of multi-axis NC machining of sculptured surface parts is significant because the equipment is very expensive and typically highly utilized, requiring capital expenditures proportional to machining time per part. The paper describes a general approach for calculation of the productivity of multi-axis NC machining of sculptured part surfaces.Equations are derived to estimate the productivity of rough and finish machining and to calculate maximum feed rates. A new type of function (called the function of conformity of a sculptured surface to be machined and machining surface of the tool) are introduced as geometric analogs of productivity of part surface machining. This function considerably simplifies the analytical description of the geometric and kinematic aspects of the process of multi-axis machining and allows calculation of optimal parameters for the machining process. INTRODUCTIONThe efficiency of machining of surfaces is a critical factor in many manufacturing processes. Most efficient machining means the cheapest machining of the parts with the required dimensions, tolerances and quality in the shortest time (Amirouche, 1993; Bollinger, et aI., 1988;Chen, Y.D., et al., 1993; Gregory and Ozsoy, 1987; Radzevitch, 1991;.The efficiency of NC machining of sculptured part surfaces on multi-axis machine tools is an important cost component of many manufacturing processes. There are numerous approaches to evaluate machining efficiency. The most general criterion is the expense of machining parts of a specified quality. An economic approach to multi-axis NC machining of sculptured part surfaces has been developed (Ludema, et al., 1987). This provides a good criterion applicable for any type of machining and yields quite accurate results, but it is quite complex, and its analytical description is bulky, so it is not widely applied. There is another criterion for machining efficiency -the machining time per part. This criterion has a simple analytical description, but its application is restricted to comparison of the efficiency of machining of the same, or at least similar, part surfaces.There are many ways to evaluate and increase the efficiency of multi-axis NC machining of sculptured part surfaces. Optimal rough machining of sculptured parts on a CNC milling machine was studied by (Dong and Vickers, 1993), using a least machining time approach. The method considerably improved productivity and reduced production costs. Research on the kinematics of three-and five-axis CNC machining Yang, 1991 and1992) has improved the efficiency of machining operations. Other investigations shared similar goals

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Section: Introductionmentioning

confidence: 81%

Efficiency of Multi-Axis NC Machining of Sculptured Part Surfaces

Radzevich

Goodman

1999

Machining Impossible Shapes

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“…The basic idea is that to ensure the roughness between adjacent lines equal to the allowed maximum of residual height (as shown in Figure 3), so it can shorten the whole path by increasing the step distance of the tool, and save processing time [7]. Obviously, this method has more efficiency than the iso-parametric line method.…”

Section: Iso-scallop Methodsmentioning

confidence: 99%

Study on Tool Path Optimization in Multi-axis NC Machining

Niu

Wang

Shen³

et al. 2015

MATEC Web of Conferences

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Abstract. This paper presents a new generation algorithm for tool path based on the optimization of traditional algorithms. Then, the tool path on an impeller is generated with UG software, and it is used to make contrasts and verifications for the effect of optimization. Finally, VERICUT software with the function of the simulating on the whole manufacturing process is utilized to verify the feasibility of the optimized algorithm.

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“…For a revolving artificial bone surface, the simple yet effective scallop-limited zig-zag strategy (Suresh and Yang, 1994) is employed. Given the scallop height limit of h , a constant scallop tool path can be calculated by the following steps: suppose { } T denotes the set of all paths in parametric space.…”

Section: On-level Tool Path Schedulingmentioning

confidence: 99%

A morphing machining strategy for artificial bone

Gan

Shen

et al. 2014

J. Zheijang Univ.-Sci.

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Abstract:In this work, a novel morphing machining strategy (MMS) is proposed. In the method, the workpiece is progressively carved out from the stock. Pitfalls in conventional iso-height strategy, such as sharp edges and unevenly distributed left-over materials, are overcome. Moreover, to calculate different levels in the MMS, an energy-based morphing algorithm is proposed. Finally, the proposed strategy is employed in the machining of artificial bone represented by a T-spline surface. The excellent properties of T-spline, such as expressing complex shapes with a single surface, have been well adopted to artificial bone fabrication. Computer simulation and the actual machining of the middle finger bone show the feasibility of the proposed strategy.

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Constant Scallop-height Machining of Free-form Surfaces

Cited by 249 publications

References 0 publications

Efficiency of Multi-Axis NC Machining of Sculptured Part Surfaces

Efficiency of Multi-Axis NC Machining of Sculptured Part Surfaces

Study on Tool Path Optimization in Multi-axis NC Machining

A morphing machining strategy for artificial bone

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