World debut for new vacuum furnace

Vacuum into

News

digital

data

reference Successful Rover

supplying

of the

is largely helium

basic

principle

other

automobile

instrument

when

Royal,

truly

Series

Crawley,

This

digital,

and

contain by this dry

refrigeration

can be designed

for

Edwards High Vacuum, Sussex RHlO 2LW. UK

West

digital

gauge

Calif.,

vacuum

is a microprocessor

computer

tested

thermocouple

210

tanks will

plant,

of

The same

testing.

Thermionics Laboratory, Inc. of Hayward, processor.

which

Systems

or manual

of vacuum

of the new

petrol

parts

for chemical

equipment.

experience

applications.

in use can be successfully

semi-automatic

New models controller

first

a set

to the Austin

radiators,

Similarly,

components

Manor

tube

it exceeds

previous

for industrial

components.

and electrical/electronic

models

whether

long

is used for leak testing

for example

automatic,

Edwards

due to Edwards’

leak detectors

or gases

method.

lo determine

of leak rate.

application

plant

liquids

and processed

value

based

compatible,

introduces

two

thermocouple

gauge

controller,

vacuum

A new

it is the

thermocouple

gauge

controller

from

Thermionics

Laboratory

IflC.

thermocouple

processor. Like all Wentgate Standard either

features

tube

capability,

or gas species

micron

or Pascal

available:

records,

choice

operator

outputs,

functions

operator

selection

real time

LED’s

tube

manufactured

of

furnace

calculation

fault

Real time

reduce

outputs

choice

of hi/low

computer

interface.

calculation

increasing

the chance

by this

and chart productivity

of operator

constant

data

to drive

unit,

move

processor

the model l/4

DIN

models

2101

offer

is a fully

identical

encased,

features.

the proven

sophisticated

Wentgate’s

standard

capability,

board,

in size-with

vary

individually to meet

‘PQ’

permit

represents

quenching

Easily

essential

and optional

The single

components.

exception:

and the 2102

resolution

and repeatability drift

calibration

accuracy:

+/-1

1 micron

high

micron

steels,

technology

design.

for both

detailed

zero and span

(1219 St, PO Box

3711,

treatment

vacuum

Engineers

Ltd. of St Ives,

already specially 440

been built.

vacuum

of a brand furnaces-has

time

sold--to

gas

rates,

It is a method of the high

dies,

moulds

and similar

enhanced

by Wentgate’s

are laid on shelves-as

fast gas flow

directly

across,

of vertically-loaded

Thermionics

Laboratory

Inc.

Hayward,

CA 94540,

USA

with

of 1350°C. measuring

mm)

graphite

long,

in an

In

furnaces.

have

new

furnace range

been

on Tuesday high

British

capacity

of UK-built

unveiled

Huntingdon.

positioning contract

heat

both

by Wentgate

consrru;ted to pro

heating

horizontal

Aerospace,

Lostock,

vertical

at Wentgate’s loading

St

furnace

for whom

has

it was

Also

multi-channel Deviation

and the

chart Ditemp

in diameter

graphite

There

is a usable

by 48 in.

element

temperature

PQ 3436

the development

rods with

uniformity,

together

platform

loading

Guides

for the correct

in to the sub-frame

is operated movement

zone

honzontal of a special

by Wentgate. are built

by hydraulic is limited

to prevent

furnace

IS Wentyate’s

and

the risk

Devlarlon

digital

temperature

controller,

recorder.

Unequalled

in its control

makes

of the

cylinder,

furniture.

in the new

programmable

high

and durability.

and horizontal

incorporated

Ditemp

from

mechanism

to the hot

mm)

Ide high

necessitated

The loading

includes:

and 1.5 bar gas quenching.

of the mechanism

of damage

Cambs. 1 February,

furnace.

furnace

level of 1 0m5 bar, a maximum

43 in. (864

insulation

efficient

of the new

at a working

loading/unloading

new

the new

are further

fittings

The size of the hot zone

for the first

tn tools,

pressure

cooling

treatment

Components

specification

vacuum

temperature

adjustment

design

Ives premises,

which

and capabilities

high

rapid

applications. heat

used typically

exceptionally

cleanliness

per year

Full one year warranty

Shown

a range

power

superior

extremely

for vacuum

loading

hot zone

The PQ 3436-first

introduces

hot zone,

gives

to the ‘cakestand’

A more

of: 1 micron

less than:

for

PO 3436

microns

calibration

debut

the

rates of the PO 3436

contrast

World

for which

known.

Quench’-a

which

suitable

oven-allowing

Sutro

features

a

all

is

Soeclfications:

22815

retains

user requirements.

‘Pressure

in many

particularly

unit;

specific

facility

Cooling

to 6600

area. Despite

equipment

engineering

are well

largest

represents

of

rack mounted.

1 micron

precision

furnaces

and

is the

heat treatment

size, the new

First off the drawing

horizontal

range:

designed

significantly,

the contract

in furnace

will

and monitoring.

bench/table

into

increase

hardenability Both

has been

by Wentgate-and

considerable

tailored

thereby

monitoring and quality.

error,

acquisition

strip

the furnace

in the UK. The 17 cu ft PO3436

ever produced

the company’s

indicator,

products,

entirely

set point

or the need for constant

monitoring,

link allows

analog

can be performed

error,

condition. process

read

switch

selector,

of several

and an RS 232C

eliminating

computer

calibrations,

pressure

a choice of digital

combinations,

system

LED display,

check.

Options

close

large

type

and display’

Several

include:

certain

that

the workload

and a 250 mm and precision,

reaches

the

Vacuum News specified temperature for the required length of tim-nsuring consistently reproducible results from batch-to-batch components. Wentgate Engineers (1976) Ltd. Industrial Estate, St Ives, Huntingdon New

high

voltage

electron

beam

PE17 4LU Cambs, UK

welder

A new high voltage electron beam welder-with full microprocessor control and a new specially designed electron gun-is announced. Developed under sponsorship from the Department of Industry, and launched at Wentgate’s St Ives premises on Tuesday 1 February 1983, the new welder offers a 150 kV maximum accelerating voltage with an inrtial 6.0 kW maximum beam power. Opening up a new market area for Wentgate, the first of the new series has already been sold, and heads up a range of which one of the chief operating highlights is the microprocessor keyboard entry of welding parameters. The control console includes a Visual Display Unit which displays both set and actual parameters during the welding cycle. A permanent record of the parameters for each weld can be obtained via an optional high speed analogue recorder. The facility also includes microprocessor storage of up to ten welding programs; automatic fault diagnosis; operator identification or vetting to prevent unauthorized use of the machine; a quality assurance package, and a manual override selection. Another important feature of the machine is the stand-alone microprocessor controlled vacuum system. This system interacts with the main machine microprocessor to present a flexible vacuum control system tailored to the exacting requirements of electron beam welding machines. The 150 kV welder also incorporates a new electron gun, based on a development by the British Welding Institute for Wentgate using computer-aided design. The high voltage unit is based on a switched mode closed-loop high voltage power supply operating at a frequency of 14130 kHz.

The new 750 kV electron beam welder from Wentgate-first of a new series. incorporating full microprocessor control and specially designed electron gun.

The implanter has a high degree of flexibility and its modular construction allows simple adaption for production use.

Advantages of the new electron gun technology include very fast response time, enabling beam parameters to be changed abruptly during welding; and low stored energy (of the order of 14 joules) which in the event of flash-avers--caused by material vapour or malfunction-is insufficient to cause damage to the component being welded. Wentgate has pioneered the use of small chamber, low power, low cost electron beam welders over the past 10 yr, and the new high powered range incorporates all the precision engineering features for which Wentgate is renowned. A range of different vacuum sizes is available for the new development, though it is expected to be of greatest interest to manufacturers requiring 1 m cube-or larger-chamber dimensions. The new welder design overcomes the working distance, beam power and welding profile limitations of low voltage machines-and is expected to benefit a variety of applications, particularly within the aerospace industry. Wentgate Engineers (1976) Ltd. Industrial Estate, St Ives, Huntingdon PE17 4LU Cambs, UK

Research

and

production

ion

implanter

A versatile high current, high energy ion implanter has been developed to meet the needs of programmes of work in the increasing fields of research into new semiconductor materials, metals and non metals.

Research and production ion implanter from Whickham Tech~noloav Systems Ltd. (Photograph by Gordon Railton and Co Ltd of Shields.) 441