摘要:

When cutting with double rake angle tools it is known that the configuration of the dead metal zone that may form, influences the surface roughness and sub-surface deformation of the workpiece. The effect of changes in cutting conditions on the configuration of this dead metal zone is reported.

ISSN:0020-7543    

DOI:10.1080/00207547608956623

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper describes the basic concepts and constructional details of a piezoelectric high-frequency dynamometer for cylindrical grinding. Resultant response is presented with a set of typical force spectra for different dressing rates. Based on the power contained within a frequency band, a technique for predicting the wheel life is put forward.

ISSN:0020-7543    

DOI:10.1080/00207547608956624

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Some aspects, by a statistical approach, of the variation of the peak torque and mean cutting power encountered in gear hobbing are presented here. The cutting torque is measured by a purpose built strain gauge dynamometer and a wattmeter evaluates the power consumed. The problem is to determine whether a host of independent variables such as axial feed, module, material hardness, number of teeth in the gear blank and hobbing speed have a significant influence on the dependent variables, maximum cutting torque and average power. Mathematical models are constructed giving the relationship between these variables and the results indicate that the cutting speed has a significant influence on both the peak torque and average power. This significant point has not previously been noted for this type of process.

ISSN:0020-7543    

DOI:10.1080/00207547608956376

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

A model ia described which can be used to assist in the design of a facility, where the facilities design includes the selection of the materials handling system and the placement of departments within the facility. The model is entitled COFAD, an acronym representing Computerized FAcilities Design. COFAD selects the facilities design which approaches the minimal materials handling system cost. The input requirements and the utilization of COFAD are demonstrated via an example problem. Although it is shown that the model results in good solutions, due to the complexity of the design problem, no claim of optimality can be made.

ISSN:0020-7543    

DOI:10.1080/00207547608956377

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Suppose the number of jobs which can be stored in front of the machines in a job shop is limited. As a result, arriving jobs for which there is no space in the shop will form a shop queue. The production capacity or maximum departure rate of jobs from the shop will depend on the way in which jobs are selected from the shop queue for release to the machine queues. For a job shop with two identical machines and random routing of jobs a number of release rules are compared. It is shown that the production capacity is increased when the number of jobs in the shop is kept less than the available storage space. Among release rules independent'of job processing times and number of operations the optimum release rule is shown, using dynamic programming, to be the idle machine rule, i.e. only release a job to the shop when a machine would otherwise be idle.

ISSN:0020-7543    

DOI:10.1080/00207547608956378

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

A simulation, model has been developed to describe an assembly line where items are removed from a conveyor belt for processing and returned for transportation to subsequent work stations. Output characteristics are presented for the case where operator's work-time distributions can be approximated to a normal curve, and the analysis is made so as to generalize the results over a useful range of tolerance, feed interval and mean service times. In particular, the effect of buffer capacity on line performance, and its relevance to tolerance time, is studied.

ISSN:0020-7543    

DOI:10.1080/00207547608956379

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The problem of slitting coils of some material (steel, paper, etc.) into smaller widths is considered in this paper. An extended linear programming model is presented that considers inventory and production scheduling aspects in addition to trim loss. The L.P. model produces an optimum slitting schedule that minimizes trim and inventory costs subject to several common production and material constraints. A plan for implementing the model is presented.

ISSN:0020-7543    

DOI:10.1080/00207547608956380

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper investigates a subcategory of the classical n job m machine problem in which the processing times of different jobs are ' ordered '. An extremely simple algorithm is presented which obtains a sequence minimizing the mean completion time of all jobs. The proof of optimality is presented in the Appendix. The problem illustratos that although no efficient procedure exists to solve the classical flow-shop problem with the mean completion time criterion, it is possible to develop such a procedure for a specially structured problem.

ISSN:0020-7543    

DOI:10.1080/00207547608956381

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547608956382

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor