USRE6195E - Improvement in the manufacture of blades of pocket-cutlery - Google Patents

Improvement in the manufacture of blades of pocket-cutlery Download PDF

Info

Publication number
USRE6195E
USRE6195E US RE6195 E USRE6195 E US RE6195E
Authority
US
United States
Prior art keywords
die
blade
metal
blades
pocket
Prior art date
Application number
Other languages
English (en)
Inventor
William H. Millee
Original Assignee
The Milleb Beothees Cutleey Company
Filing date
Publication date

Links

Images

Definitions

  • Fig. 4 is a vertical transverse section of both dies when placed together, through line 0 D of Fig. 3.
  • Fig. 5 is a vertical transverse section of the same through line E F of Fig. 2.
  • Fig. 6 is a vertical transverse section of the same through line G H of .Fig. 2.
  • Fig. 7, N is a side view of a blank after being operated upon by the break-down die 0, and M is a plan view of the same piece after being operated upon by the dieL; and
  • Fig. 8 is a side view of a blade after being operated upon by the die L, and the burr removed and the blade separated from the bar.
  • ()ur invention relates to the manufacture of blades for pocket-cutlery; and it consists of two dies or pairs of dies, which may be used in connection with each other, one of the said dies or pairs of dies being used to prepare the bar for its final shape by pressing the metal together for the purpose of bringing the stock more at that point where it is most needed in the manufacture of the blade.
  • the other die or pair ofdies is used to give the desired shape or form to the blade and its heel, the operations in either set of dies being performed while the metal is properly heated, and pressure applied to the dies while the barof metal is held within them.
  • the object of our invention is to enable the manufacturer to form the blades of pocket-cutlery with as little manipulation of the metal as possible, and yet not be obliged to use bars of metal of such size as to incur too much waste in their manufacture,thus saving time, labor, and expense in the operation.
  • a and B represent two blocks of metal, which, for convenience of using them, contain the two dies required for this operation of converting a portion of a bar of steel into a blank pocket-knife blade; and although the dies are in twopartsthatis, one-halfof the die is in one block, A, and the other half in the block BI denomina te the halves one die,inasmuch as both halves are necessary to give the required form to the metal.
  • One of these dies I denominate the break-down, as its purpose is to break down or depress the metal, and crowd it together in certain places, making the bar thicker in some parts and smaller in others, and this break-down die is represented upon the side of the blocks A and B at O.
  • this die is shown more fullyin Fig. 3, in which so is a recess terminating at each end of the recess in the elevated points 8 ands, the point 3 being the highest, and from these two points the planes n and m extend, inclining downward as they approach the ends of the block B.
  • the block A is another recess, 00', opposite the one in the block B, and terminating in the ridges s and s, and in said recess 00' is a protuberance, m. From these ridges s and s the planes n and m extend, one each way, and incline upward as they approach the ends of the block A.
  • the line t in Fig. 8 represents the line of division between the blocks A and B.
  • one of the blocks is set firmly into a solid position, while the other is fixed in a position to move downward upon the first; and if a bar of metal be heated and placed lengthwise in the die 0 thus described, the ridges or parts 8 and s, and also 8 and s, approach nearer to each other than at any other part of the metal of that die, and the metal is pressed harder at those points, and is forced back each way, a part being crowded back into the recess at 00 and 00', while the space between the planes a and n on one side the recess, and the planes m and m 011 the other, be-
  • the metal is forced toward the ends, and assumes the form of the die 0, and the metal, in a bar of uniform size, is forced, by this process, into those parts of the bar where it is required to have the largest quantity of stock, and without the longer process of hand-forging now practiced.
  • the cavity a is flat at its base, and is of the proper size and shape to form the entire heel of the blade, and is shown in cross-section in Fig. 5.
  • the cavity b is made one-half in one block, A, and the other halt in the otherblock, B, the part I) being that part of the die which forms the blade at its thickest or heaviest part along the back.
  • the part along the dotted line 0 is made more shallow, while'the part at c, from the part a to the end of the die, is made a little deeper, to allow room for the waste stock when the pwssure is applied to the metal in the die; and a shallow cavity is also made at 0, extendmg from the point e to the outer end of the die. This cavity also allows room for the waste stock of the blade when pressure is applied to the metal in the die.
  • the Hlges t of the cavity 11 may be beveled in such portions as are desirable, to give ihe proper bevel to the back and point of the blade. That part of the dieL which is thus described, and which forms the blade, is
  • No shalloW cavities are required around the part a of the die L, as it is designed that as little waste stock should be left projecting from the heel of the blade in the blank as possible, while it is desirable that the blade should be left a lit tle thicker in the blank than in the finished blade, in order to have sufficient metal to operate upon successfully in the process of tempering the blade, and in giving it its final finish.
  • the small cavity 0 is made merely to give sufficient metal at that point to hold the blank blade to the rod in punchingofi the waste stock or burr from the blade.
  • Fig. 8 represents ablade after the waste stock or burrhas been removed, which may be done by means of a die and counter-die of the desired shape of the blade. It will be perceived that by this operation the whole process of forming the blade of a pocket-knife is confined or limited to three simple operations or movements of a die, while the small amount of time required to form each, and the facility with which any number of blades of any desired style or pattern may be produced, without the least variation, render this a very advantageous one over the old and ordinary process of forging the blades by hand.
  • the die For the forging of bars in the manufac ture of blades of pocket-cutlery, the die 0, by means of which the metal in the bar is gathered or pressed into that part of the bar where I the most stock is required to form the heaviest part of the blade, substantially as described.

Family

ID=

Similar Documents

Publication Publication Date Title
USRE6195E (en) Improvement in the manufacture of blades of pocket-cutlery
US106073A (en) Improvement in the manufacture of blades of pocket-cutlery
US786504A (en) Die for cutting contiguous fasteners.
US142955A (en) Improvement in dies for the manufacture of pinchers
US327742A (en) Machine for making nuts
US1118180A (en) Process of making steel die-punches.
US379730A (en) Die for making thrashing-machine teeth
US352409A (en) Die for making shears
US189232A (en) Improvement in dies for making hammers
US50374A (en) Improved holding-shank of molds for glass buttons
US172253A (en) Improvement in dies and punches for forming the eyes of picks
US1433819A (en) Jewelry unit and method and apparatus for making the same
US1003654A (en) Machine for making step-joints.
US148872A (en) Improvement in dies for forging axle-clip s
US139413A (en) Improvement in dies for swaging carriage-clips
US255156A (en) Manufacture of scissors
US442430A (en) Machine for making wroug ht-m etal bearing-boxes
US215485A (en) Improvement in dies for the manufacture of spoons
US160059A (en) Improvement in dies for making the handles of pocket-cutlery
US1155229A (en) Process of making cutlery.
US455499A (en) Machine for forming loom-cranks
US184158A (en) Improvement in the methods of making hammers
US501851A (en) Half to edward h
US172383A (en) Improvement in machinery for manufacturing horseshoes
US1098071A (en) Manufacture of blanks such as are used in the manufacture of forks, spoons, handles, and similar articles.