摘要:

Illustration is given here of the different development, stages required in the retrofitting of an existing numerical control machine, giving appropriate details of the interface link. Some software developments are indicated that enhance the range of the machine tool when connected on-line to a minicomputer, and mention is made of the production of Novikov gears.

ISSN:0020-7543    

DOI:10.1080/00207547808930035

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This paper deals with the study of the smoothing of the anode surface in electrochemical machining (ECM). An experimental ECM unit, and a relocation fixture-cum machining set-up were used to study the effect of machining parameters on surface modifications in ECM. Studies on vee and trapezoidal shaped profiles showed that they smooth out to a sinusoidal profile before attaining the final shape and that at higher currents less time is required for producing the sinusoidal wave form. Flow velocity has an appreciable effect on short wave length irregularities.

ISSN:0020-7543    

DOI:10.1080/00207547808930036

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The quenching process is known, to induce large residual stresses. These stresses cause difficulty in maintaining close tolerances on the components during manufacture. In the present investigation a simple technique has been developed to measure the residual stresses caused due to quenching of plain carbon steel. The results indicate that largo magnitudes of compressive residual stresses are induced beneath the surface due to the quenching process.

ISSN:0020-7543    

DOI:10.1080/00207547808930037

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The determination of economic sampling inspection plans is discussed. A computational procedure that allows beta prior information is outlined.

ISSN:0020-7543    

DOI:10.1080/00207547808930038

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Unlike most of the previous studies of the multiproduct, multimachine systems, hero an attempt is made to consider the man-machine overtime and idleness costs together with the usual inventory-related costs (the set-up costs, carrying costs, and back-logging costs). The major assumptions of the model include: (a) demand for each product is captive and constant; (b) single or multiple facility work centres may be employed: (c) the total manufacturing operations of any single product must be completed before another product can be started; (d) all the manufacturing facilities are set up simultaneously for each of the products and its production can be started only after all the machines are ready. The annual total variable cost function is found to be very complex. Therefore, a recursive algorithm is required to solve this function for the values of optimal produetion-cycle-thnes of the individual products,Tj*,s. As the facilities are assumed to produce only one product at a time, these cycle time values need to be fitted into a production schedule so that there is no conflict between any two products on any of the machines and so that any modification in the values ofTj*,sresult in the least increase of the system's total annual variable costs. Such total annual variable costs, computed with the help of this model and its alogrithm for 15 different situations, are compared with those provided by two other known models. Each time this model performs significantly better than the other two.

ISSN:0020-7543    

DOI:10.1080/00207547808930039

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Holtat al. (1960) modollod the production scheduling problem with quadratic costs and derived an optimal set of scheduling rules. Our experiment found those rules may not be effective if costs are non-quadratic. This may explain the relative lack of use of these rules in industry.

ISSN:0020-7543    

DOI:10.1080/00207547808930040

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This paper presents a morphological model of an integrated production management system. The model is designed as an intersecting point structure. The two dimensions in the model are the phases in a control cyclus and the objects of control. Each point in the structure represents an activity in the total production management system.

ISSN:0020-7543    

DOI:10.1080/00207547808930041

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The present study, covering practical investigations of the nature of office activities and capabilities of clerical workers, is designed (1) to clarify how any type of office is organized according to one or more of the six basic office models, (2) to present a basic theory for determining the manpower required from expectations of the input-time and output-time intervals of movements of clerical units (i.e. forms and reports) to and from an office and (3) to present a new method for determining adequate requirements for clerical manpower, a method characterized by a combination of the deterministic and probability methods.

ISSN:0020-7543    

DOI:10.1080/00207547808930042

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Control of an output value y when it is a function of various variables such as A, B, is usually achieved by controlling those causes A, B. After discussing methods using partial derivatives and Monte-Carlo, which are either inaccurate or inefficient, the use of orthogonal arrays, and the use of analysis of variance for the data calculated or conducted by the arrays, are proposed in this paper as these methods have no such defects. A live example taken from an electric circuit used for a colour T.V. set is used for the explanation.

ISSN:0020-7543    

DOI:10.1080/00207547808930043

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547808930044

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor