manufactura convencional

7/23/2019 manufactura convencional

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TEAM: CARDOZO AVALOS LUIS DON

JAIME ALBERTO GARES FRANCISCO JAVIER MONZON AGUILAR DIANA PA POMPA GOMEZ MARIA GUAD ZAMORA GOMEZ OSCAR ART

LINE SEQUENCE SYSTEM



There are in general four productionprocesses:

Intermittent production

Batches production

Line production

Continuous production



INTERMITTENT PRODUCTION

This system creates the sufficient flexibil

kinds of products or services in significat

personalization is relatively high and the

particularly product or service is low.

The specific needs of the next client are unknown and the

frequency of the request is not predictable. Each new request

is managed as an independent unit. This intermittent

production process includes mainly the use of and flexible flow

strategy.

Examples:• Production of a metal

casting• Medical care in

emergency room



BATCHES PROCESS

This process is distinguished of an intermittent by their volume, variety and quality characteris

difference is that the volumes are higher than the same products and services, another differen

provides a tighter variety of products and services. It is processed a batch of a products or clien

the production is adjusted to the next one.

Examples:• Air travel• Manufacture of paints



LINE PROCESS

This process is localized between the batch, and continuous processes, it volumes are bid, the

correspondent products and services are standardized, this allows us to organize the resource

product or service, the material advances in a lineal way from one operation to the next with

sequence, there is a little inventory between one operation and another.

Exam• ca• To• a



CONTINUOUS PROCESS

A continuous process represents the final corner of the

standardized production, with big volume and rigid linear

flows. Frequently, the process is intensive in capital and it´s not

interrupted in the 24 hours of the day, with the purpose of

maximize the equipment use and avoid the expensive stops

and new starts.

The continuous processes are uses almost

manufacturing purposes and fits perfectly

strategy.

Examples:• Chemicals• Oil refineries• Producing beer



GROUPS TECHNOLOGY SYSTEM



This is a manufacturing technique in which functionally-group machines(producing parts or products with similar characteristics) are organizedinto cells to achieve high repeatability levels.

WHAT DOES THIS PHILOSOPHY SAY?

This philosophy is about looking for theadvantages of the large production series formake it better in medium or small series…



FAMILIES OF PARTS:

It is a collection of pieces that are similar, either because of its geometrishape and size or because the steps required for manufacturing arsimilar.

How can we create families of parts?

1.- From the point of view of manufacture.

2.- From the point of view of design.



CLASSIFICATION

1.- From the point of view of manufacture.

Defined by:

- In terms of functiand overall shap

of the part.- A level design

details.



2.- From the point of view of design.

The advantages obtained are less movement of the work in progress,shorter assembly times and lower manufacturing times….

CLASSIFICATION

Define

- A leveloverall - A partial

leve- A level

opera



What about the results?

Here you can see theproductions.In the figure aboveproduct have different w

however that’s not theway to group families…In the figure below wesee the best form to agthe familes by desing.



EXAMPLE:

Similar parts are arranged in families of parts. For example a planproducing 10,000 different pieces may be able to group the great majoritof these 50 or 60 pieces in different families. Each family would havcharacteristics similar design and manufacture. Therefore the productioof each member of a family will be similar, which can be used to improvthe efficiency of the manufacturing process of that family. Benefits can bgained by grouping the cells in groups or machines to facilitate workflowAlso in the process of design advantages can be obtained with thgrouping into families, thanks to the classification and codification of parts



This method, developed by Professor Burbidge, can form parand machine groups that these families must be m

simultaneously. The information base for the formation oconstitute the roadmaps in the list of machines requiredmanufacture of parts appears collection

The training method based on the analysis of the process ctwo stages:

A) The flow analysis involves analyzing the industry, simplify anthe flow of parts through large sections of forging, machining, treatments, etc. Starting from this initial flow is aand simplified by meeting facilities compatible or

modification to minimize the flow of parts.

PROCESS ANALYSIS



B) The group analysis is carried out within each of tlarge sections considered in the previous stage. The aof this analysis is to divide the pieces into families adivide the equipment in each section machines grouso that each family parts are fully processed by oone group.



CODING

It can be defined as the attribution of a symbol to each ccharacteristic of an element so that this symbol contains inforabout the nature or kind of characteristic considered. The main bare: allows quick recovery process designs, facilitates the formapart families and machine cells facilitates precise machinrequirements estimation, allows better utilization of machines, too

labor helps the production planning, among others.

Can be of two types, based on their structure:

1. Systems of hierarchical structure. In these systems the interpretaeach symbol depends on the value of the preceding symbol.

2. Systems string type structure. Such codes in the interpretation osymbol in the sequence is fixed. Not depend on the value of the p

symbol.



SCOPE OF EACH METHOD FOR FORMATIONOF FAMILIES

Direct formation of part families. The direct formation from inspeadequate when it comes to incorporating technology group at tlevel, or when a situation volume/variety high relationship exisituation occurs frequently in the case of manufacturing theproducts and relatively simple

Analysis of the process. It is the best method of forming families o

to the second level. It is the only method which leads directlyformation of part families and machine groups.

Family formation through coding. The previous coding provides sofor the application of group technology to the third level, particuthe reduction of variety in design and internal standardization.



Is carried out at three levels: machine level, group level, and enterprislevel set

A machine level. Machining consists of families that can be machined on single machine, and with the same tooling. with similar processes. It considered that the worker process the most complex piece includes a

necessary operations for other components

APPLICATION OF TECHNOLOGY GROUP



Implementation of technology group

Conditions for implementing

Work in small series

Sufficient number of parts

Parts with a certain degree of similar.

Sufficient number of machines

Accurate production information

Minimum internal inspections



Implementation of technology group

Implementation phase:

Preparatory phase

• Periodic parts volume by

types and operations• Existence of sufficiently

detailed series

• Exact knowledge of themachinery park.

Development phase ofmedia

• Machinery

• Tools

• Operators

• Composition of groups

Exploitation

• Creation of file

• Information an



Benefits of technology groups

Design: use of a classification and coding system

Work preparation: it tends to promote standardization in the phasesof manufacture, including the preparation of tools and assemblies.

Movement of materials: reduction of movements.

Production and inventory control The process plan

Employee satisfaction



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manufactura convencional