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Tools for the Workshop

Tools for the Workshop A Monthly Selection of Recent Equipment and New Methods M.R.E. Radius grinding Attachment NEW radius-grinding attachment, which has been introduced by Manchester Re­ petition Engineers Limited, Reynold Works, Chell Street, Longsight, Manchester 12 is shown in FIG. 1. The following are the main advantages claimed for this attachment over other radius grinding attachments: Gives full concave and convex movement. Does not foul machine or workpiece in any position. For nameplates carrying several panels, all to alter the serial number; the appropriate Allen- Work can be placed on any part of the table information can be marked at one blow by us­ screw is loosened and the last character or two without centralizing from pivot. ing a chase and pressure pad. There is no stand­ characters removed and replaced, locked, and One width of wheel or size of end mill will ard size of chase since they must be designed to the next plate inserted. accommodate all radii. suit particular shapes and sizes of labels. Pryor Where the serial number changes with every Can be used for milling, drilling, grinding and interchangeable steel type can be used in similar plate, it is worth while investing in an automatic die-sinking. fashion to printers' type by this method. A typi­ numbering head—such a unit would definitely The device consists of a rigid cast-iron base cal set-up is shown in FIG. 3. A double-sided fly speed up output. The marking then has to be carrying two slides, the lower one of which moves press is used. carried out in two operations, viz: the model along substantial guides in a lateral direction and The chase is securely mounted in the bed of number, wattage, voltage or other constant in­ has on its upper face guides along which the the press, locking on the flanges provided. Steel formation indented in the manner described upper slide, forming the work-table, moves in a type and spacer pieces are loaded to suit the above, after which serial numbering takes place. longitudinal direction. This upper slide or work- panels of the nameplate and the composite is A typical numbering head is illustrated in FIG. 2. table has a T-slot for the attachment of acces­ locked by Allen-type screws. It is designed for use in an air press or a double sories cut across its face. A vertical pin, passing The nameplate is placed, face downward, sided fly press. through bushes set in the centre of each slide, over the assembled type and against adjustable There is no doubt that the nameplate marked extends downwards to register in a tee-slot cut fences. The pressure pad, which fits into the ram in this way is attractive, and imparts a well- across the face of a disk below the slides. This of the press, is brought into contact with the finished appearance. pin may be set at any point along the length of back of the plate, which action completes the This equipment is available on short delivery the slot, where it is locked by means of a screw marking operation. from Edward Pryor & Son Ltd., Broom Street, at its top. The off-centre setting of this pin is After removing the plate it is a simple matter Sheffield 10. effected with reference to a vernier scale along the front of the work-table. The disk is supported on a pivot to which is keyed a worm-wheel driven by the hand-wheel to be seen projecting from the front of the base. It will be appreciated that, as the slotted disk is rotated through the hand-wheel, when the slide- pin is off centre, lateral movement imparted by the pin will be transmitted to the lower slide and longitudinal movement to the upper slide or work- table. This combined movement imparts a circular motion, corresponding to the degree of offset of the pin, to components mounted on any part of the work-table. Circular movement of the entire table obviates the necessity for setting a work- piece or wheel-truing diamond to a given dis­ tance from a central pivot, as all points on it move to a corresponding degree. A form tool clamped to the work-table could have all the radii generated; with the attachment all straight portions of the tool could be milled or ground from the slides of the machine without disturbing the workpiece on the attachment table. Form-relieved cutters can be both milled and ground on the attachment. The attachment is not only confined to milling and grinding machines, but can be adapted to lathes, drilling machines and other similar machines. Nameplate Marking The marking of nameplates with serial num­ bers, voltage and wattage figures, etc., absorbs a great amount of time throughout industry. The use of single hand stamps to apply such mark­ ings not only takes up valuable hours but allows an uneven, unattractive and often crude result. A skilled man can produce a satisfactory impres­ sion, consisting of six figures, in 30 secs. when using hand stamps; 120 components bearing such an inscription would be marked each hour if this rate were maintained. An unskilled opera­ tor could mark over 500 similar components bearing the same inscription in the same time by using interchangeable steel type in a suitable fixture. July 1947 239 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Tools for the Workshop

Aircraft Engineering and Aerospace Technology , Volume 19 (7): 1 – Jul 1, 1947

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb031533
Publisher site
See Article on Publisher Site

Abstract

A Monthly Selection of Recent Equipment and New Methods M.R.E. Radius grinding Attachment NEW radius-grinding attachment, which has been introduced by Manchester Re­ petition Engineers Limited, Reynold Works, Chell Street, Longsight, Manchester 12 is shown in FIG. 1. The following are the main advantages claimed for this attachment over other radius grinding attachments: Gives full concave and convex movement. Does not foul machine or workpiece in any position. For nameplates carrying several panels, all to alter the serial number; the appropriate Allen- Work can be placed on any part of the table information can be marked at one blow by us­ screw is loosened and the last character or two without centralizing from pivot. ing a chase and pressure pad. There is no stand­ characters removed and replaced, locked, and One width of wheel or size of end mill will ard size of chase since they must be designed to the next plate inserted. accommodate all radii. suit particular shapes and sizes of labels. Pryor Where the serial number changes with every Can be used for milling, drilling, grinding and interchangeable steel type can be used in similar plate, it is worth while investing in an automatic die-sinking. fashion to printers' type by this method. A typi­ numbering head—such a unit would definitely The device consists of a rigid cast-iron base cal set-up is shown in FIG. 3. A double-sided fly speed up output. The marking then has to be carrying two slides, the lower one of which moves press is used. carried out in two operations, viz: the model along substantial guides in a lateral direction and The chase is securely mounted in the bed of number, wattage, voltage or other constant in­ has on its upper face guides along which the the press, locking on the flanges provided. Steel formation indented in the manner described upper slide, forming the work-table, moves in a type and spacer pieces are loaded to suit the above, after which serial numbering takes place. longitudinal direction. This upper slide or work- panels of the nameplate and the composite is A typical numbering head is illustrated in FIG. 2. table has a T-slot for the attachment of acces­ locked by Allen-type screws. It is designed for use in an air press or a double sories cut across its face. A vertical pin, passing The nameplate is placed, face downward, sided fly press. through bushes set in the centre of each slide, over the assembled type and against adjustable There is no doubt that the nameplate marked extends downwards to register in a tee-slot cut fences. The pressure pad, which fits into the ram in this way is attractive, and imparts a well- across the face of a disk below the slides. This of the press, is brought into contact with the finished appearance. pin may be set at any point along the length of back of the plate, which action completes the This equipment is available on short delivery the slot, where it is locked by means of a screw marking operation. from Edward Pryor & Son Ltd., Broom Street, at its top. The off-centre setting of this pin is After removing the plate it is a simple matter Sheffield 10. effected with reference to a vernier scale along the front of the work-table. The disk is supported on a pivot to which is keyed a worm-wheel driven by the hand-wheel to be seen projecting from the front of the base. It will be appreciated that, as the slotted disk is rotated through the hand-wheel, when the slide- pin is off centre, lateral movement imparted by the pin will be transmitted to the lower slide and longitudinal movement to the upper slide or work- table. This combined movement imparts a circular motion, corresponding to the degree of offset of the pin, to components mounted on any part of the work-table. Circular movement of the entire table obviates the necessity for setting a work- piece or wheel-truing diamond to a given dis­ tance from a central pivot, as all points on it move to a corresponding degree. A form tool clamped to the work-table could have all the radii generated; with the attachment all straight portions of the tool could be milled or ground from the slides of the machine without disturbing the workpiece on the attachment table. Form-relieved cutters can be both milled and ground on the attachment. The attachment is not only confined to milling and grinding machines, but can be adapted to lathes, drilling machines and other similar machines. Nameplate Marking The marking of nameplates with serial num­ bers, voltage and wattage figures, etc., absorbs a great amount of time throughout industry. The use of single hand stamps to apply such mark­ ings not only takes up valuable hours but allows an uneven, unattractive and often crude result. A skilled man can produce a satisfactory impres­ sion, consisting of six figures, in 30 secs. when using hand stamps; 120 components bearing such an inscription would be marked each hour if this rate were maintained. An unskilled opera­ tor could mark over 500 similar components bearing the same inscription in the same time by using interchangeable steel type in a suitable fixture. July 1947 239

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Jul 1, 1947

There are no references for this article.