US134871A - Improvement in screw-cutting machines - Google Patents

Improvement in screw-cutting machines Download PDF

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Publication number
US134871A
US134871A US134871DA US134871A US 134871 A US134871 A US 134871A US 134871D A US134871D A US 134871DA US 134871 A US134871 A US 134871A
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Prior art keywords
bolt
screw
dies
chuck
cutting machines
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses
    • B23G1/04—Machines with one working-spindle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/47—Cutting by use of rotating axially moving tool with work-infeed means
    • Y10T408/488—Driven by lever or connecting link
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/551—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support with means actuated by work to release Tool from fixed position in Tool support

Definitions

  • My invention consists of certain devices by which the machine is adjusted in a peculiar manner to cut automatically threads of any desired length upon thebolt; and also consists of a peculiar device designedl to enable the operator to conveniently adjust the bolt in the jaws of the chuck which secures it.
  • Figure 1 is a perspective view of a machine embodying ⁇ my invent1on.
  • Fig. 2 is a plan of the same.
  • A is the frame of the machine; B, the spindie; and C, the die-chuck. erated automatically by levers D D', sliding cone E, and spring F.
  • the cone swivels in the cross-bar G, to which it is confined laterally by means of a groove in the cone, into which the bar G its.
  • the outer ends of the bar G are firmly secured, by set-screws, locknuts, or otherwise, to the sliding bars or rods H H', which are supported on brackets I I.
  • the bars or rods H H' have adjustable collars J J' J" J' secured to them by set-screws j.
  • the sliding bolt-chuck K has an ear on each side firmly attached to it, marked L L' in the drawing. These ears surround the bars H H' in the manner shown in positions between the The bars H H' are graduated, in parts of an inch and inches, in the manner shown, so that the collars can be adjusted accurately to define the points at which the dies are opened and closed, and the length of the screw thus determined, the collars being the means of governing the length of motion ofthe bolt-chuck.
  • the ears L L' strike the collars in either direction the dies are thereby opened and closed.
  • the bolt-chuck In cutting bolts the bolt-chuck has to be moved back after the cutting of each bolt a sufficient distance to enable the dies to close after the bolt has beenwithdrawn therefrom,
  • An adjustable gage, M having an aperture, on, through which the bolt passes in being cut, is-secured to the frame A, by set-screwor bolt N, in such a way that it can be moved in either direction to effect the desired adjustment, the end which is perforated (marked m) being a sufficient guide to enable the operator to locate the end ofthe bolt, in the operation of securing it, in the chuck which holds it.
  • the bolt-chuck K having two tappetarms, L and L', and the sliding cone E, in combination with the bar or cross-head G and a pair of graduated slide-rods, H and H', which are provided, respectively, with adjustable collars J J' and J" J', all substantiallyr as and for the purpose specified.

Description

G. EMIS.
Screw Cutting Machines.
Paienfedlan. 14,1873.
No. when.V
lIllvelmto1? collars J J' and J'l J'.
UNITED STATES PATENT OFFICE.
GEORGE EMIG, OF CINCINNATI, OHIO.
IMPROVEMENT IN SCREW-CUTTING MACHINES.
Specification forming part of Letters Patent No. 134,871, dated January 14, 1873.
Nature and Objects of Invention.
My invention consists of certain devices by which the machine is adjusted in a peculiar manner to cut automatically threads of any desired length upon thebolt; and also consists of a peculiar device designedl to enable the operator to conveniently adjust the bolt in the jaws of the chuck which secures it.
Description of the Accompanying Drawing,
Figure 1 is a perspective view of a machine embodying `my invent1on. Fig. 2 is a plan of the same.
General Description.
A is the frame of the machine; B, the spindie; and C, the die-chuck. erated automatically by levers D D', sliding cone E, and spring F. The cone swivels in the cross-bar G, to which it is confined laterally by means of a groove in the cone, into which the bar G its. The outer ends of the bar G are firmly secured, by set-screws, locknuts, or otherwise, to the sliding bars or rods H H', which are supported on brackets I I. The bars or rods H H' have adjustable collars J J' J" J' secured to them by set-screws j.
lThe sliding bolt-chuck K has an ear on each side firmly attached to it, marked L L' in the drawing. These ears surround the bars H H' in the manner shown in positions between the The bars H H' are graduated, in parts of an inch and inches, in the manner shown, so that the collars can be adjusted accurately to define the points at which the dies are opened and closed, and the length of the screw thus determined, the collars being the means of governing the length of motion ofthe bolt-chuck. When the ears L L' strike the collars in either direction the dies are thereby opened and closed.
In cutting bolts the bolt-chuck has to be moved back after the cutting of each bolt a sufficient distance to enable the dies to close after the bolt has beenwithdrawn therefrom,
and therefore the end of the next bolt has to' Abe the saine distance from the face of the diechuck when it is secured for cutting.
To facilitate the accurate adjustment of the The dies are op-n bolt preparatory to its being forced into the dies I have provided the following device: An adjustable gage, M, having an aperture, on, through which the bolt passes in being cut, is-secured to the frame A, by set-screwor bolt N, in such a way that it can be moved in either direction to effect the desired adjustment, the end which is perforated (marked m) being a sufficient guide to enable the operator to locate the end ofthe bolt, in the operation of securing it, in the chuck which holds it.
It will be seen that, by the provisionof the two side rods H H', cross-bar G, two ears, L L', and collars J J' J" J', when the cone E is moved to either open or close the dies, the strain upon it is perfectly balanced, and but little power is required to move it, and but little friction attends the motion of any of the parts. This is a very important matter when it is considered that it is the threads of the bolt itself which sustain the stra-iu in the automatic opening of the dies.
I am aware that heretofore screw cutting machines have been built in which the boltchuck has a single tappet-arm acting upon collars of a slide-rod connected to a sliding cone in such a manner as to automatically open the dies the moment the desired length of thread is cut. I do not, therefore, claim this feature broadly, but confine myselfto sin h a duplication of said mechanism as will relieve the threads of the bolt of undue and unequal strain during the action of opening the dies, as hereinbefore explained.
Claims.
l. The bolt-chuck K, having two tappetarms, L and L', and the sliding cone E, in combination with the bar or cross-head G and a pair of graduated slide-rods, H and H', which are provided, respectively, with adjustable collars J J' and J" J', all substantiallyr as and for the purpose specified.
2. rIhe adjustable gage M nz, iu combination with the bolt-chuck K and die-chuck O, the dies of which are opened and closed automatically by the bolt-chuck through intermediate mechanism, substantially as and for the purpose specified.
In testimony of which invention I hereunto set my hand.
GEORGE EMIG.
Witnesses FRANK MILLWARD, J. L. WARTMANN.
US134871D Improvement in screw-cutting machines Expired - Lifetime US134871A (en)

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