US2688144A - Automatic pipe machine - Google Patents

Automatic pipe machine Download PDF

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Publication number
US2688144A
US2688144A US747756A US74775647A US2688144A US 2688144 A US2688144 A US 2688144A US 747756 A US747756 A US 747756A US 74775647 A US74775647 A US 74775647A US 2688144 A US2688144 A US 2688144A
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United States
Prior art keywords
berkey
machine
automatic pipe
pipe
harry
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Expired - Lifetime
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US747756A
Inventor
Harry L Berkey
George E Hieber
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Landis Machine Co
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Landis Machine Co
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Priority to US747756A priority Critical patent/US2688144A/en
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    • 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
    • B23G1/22—Machines specially designed for operating on pipes or tubes
    • B23G1/225—Machines specially designed for operating on pipes or tubes automatically controlled
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S470/00—Threaded, headed fastener, or washer making: process and apparatus
    • Y10S470/901—Pipe or rod workholder
    • 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
    • Y10T408/13—Cutting by use of rotating axially moving tool with randomly-actuated stopping means
    • Y10T408/14—Responsive to condition of Tool or tool-drive
    • 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
    • Y10T408/16—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor
    • Y10T408/17—Cutting by use of rotating axially moving tool with control means energized in response to activator stimulated by condition sensor to control infeed
    • Y10T408/172—Responsive to Tool
    • 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
    • Y10T408/18—Cutting by use of rotating axially moving tool with stopping upon completion of prescribed operation
    • 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
    • Y10T408/52—Cutting by use of rotating axially moving tool with work advancing or guiding means
    • Y10T408/54—Means to intermittently advance work
    • 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
    • Y10T408/563—Work-gripping clamp
    • Y10T408/5633—Adapted to coaxially grip round work
    • Y10T408/56337—Oppositely moving lateral clamps

Definitions

  • This invention relates to automatic machines for performing machining operations on the ends of pipes, tubes, and the like. More specifically, the invention comprehends the automatic and positive manipulation of a pipe from the blank to the completely machined product, each end thereof being machined by a separate unit of the combined machine.
  • Machines of the prior art consist of a machining unit disposed to operate upon each end of the pipe and a transfer table thcrebetween to cause the pipe to move laterally from one machining unit to the other and axially into and out of the proper position for performing the machining operation.
  • the pipe is moved laterally onto a series of rolls aligned with the pipe-holding chuck. Rotation of these rolls then move the pipe longitudinally through the chuck into contact with a work stop. The chuck is then closed At the completion of the machining operation, the chuck is opened, the direction of rotation of the rolls is reversed and the pipe is moved axially out of the chuck.
  • the present invention marks an important advance over the prior art by eliminating several of the above steps to reduce the time required for the actual handling of the pipe to a fraction of the time formerly required. This is especially true for the shorter lengths of pipe which must necessarily travel farther when moving axially from one machine to the other.
  • A. further object of the invention is to provide an improved system of indexing the pipe laterally into alignment with the machining units.
  • Another object is to provide a system for accomplishing the axial transfer of the pipe while the machining units are employed on other pipes, thus effecting a major saving of time.
  • a still further object is to provide a chuck mechanism into which the work may be carried laterally which may be accomplished much more quickly than the act of pushing the work through the chuck axially.
  • Another object is the provision of an electrohydraulic control circuit which integrates the several units of the machine into one complete whole in which each operation of the machining operation is performed sequentially.
  • positive control is secured, since no single operation can begin before the preceding operation has been completed, regardless of accidental delay from any cause.
  • Another object of the invention is the provision of a machine which will, with a minimum of change, perform any desired operation upon either or both ends of the pipe. This feature is especially desirable in the case of such work as upset tubing, which is threaded externally at one end and internally at the other.
  • Figure l is a top plan view of the complete machine.
  • Figure 2 is a side elevation of one of the machining units arranged as a threading machine
  • Figure 3 is a rear end elevation of the same machine as in Figure 2;
  • Figure 4 is a front end elevation of the same machine
  • Figure 5 is a side elevation of one of the machining units arranged as a reaming and facing machine
  • Figure 6 is a vertical longitudinal sectional View through the spindle of the central portion of the machine shown in Figure 2.
  • Figure '7 is a transverse vertical sectional view along line 'll of Figure
  • Figure 8 is a fragmentary vertical sectional view along line 8-8 of Figure 6;
  • Figure 9 is a fragmentary horizontal sectional View taken. along line 9-9 of Figure 6;
  • Figure 10 is a horizontal sectional view taken substantially along line Ni -ill of Figure 6;
  • Figure 11 is a vertical longitudinal sectional view through the spindle of the machine shown in Figure 5;
  • Figure 12 is a vertical sectional view showing the gripper mechanism and taken substantially along line E ?.i2 of Figure 2;
  • Figure 13 is a vertical sectional view taken substantially along line iii-l3 of Figure 12;
  • Figure 1a is a top plan view of one of the pedestals for supporting the transfer mechanism, the particular pedestal shown being the one in the upper right hand corner of Figure 1;
  • Figure 15 is a side elevation of the pedestal shown in Figure 14;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Description

Sept. 7, 1954 H. BERKEY ETAL 2,688,144
\ AUTOMATIC PIPE MACHINE 1 Filed May 13, 1947 l9 Sheets-Sheet l HARRY L. BERKEY GEORGE E. H EBER W mwxw Sept, 7, 1954 H. 1.. BERKEY ET 2,683,144
AUTOMATIC PIPE MACHINE Filed May 15, 1947 19 Sheets-Sheet 2 BMW HARRY L. BERKEY GEORGE E. HIEBER Sept. 7, 1954 H. L. BERKEY ET AUTOMATIC PIPE MACHINE 19 Sheets-Sheet 3 Filed May 13, 1947 m t 0 11 0 O O .MW ll. O n6 T M O O O 8 3 0 w 3.. 0mm 31: o f 0 a o I O m o J o mm 3 in O 3.
game/rm HARRY L. BERKEY GEORGE E. HIEBER Sept. 7, 1954 H. 1.. BERKEY ET 2,638,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 4 Qvwe/wto'a L BERKEY HARRY GEORGE E. WEBER Sept. 7, 1954 H. BERKEY ET AL AUTOMATIC PIPE MACHINE 19 Sheets-Sheet 5 Filed lay 13, 1947 in 13L,
QFN ONN Elma/WM HARRY L. BERKEY GEORGE E. HIEBER mwxx Sept. 7, 1954 H. L. BERKEY ET AL 2,638,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 6 HARRY 1.. BERKEY GEORGE. E. HIEBER E- 7 3% mmxwm Sept. 7, 1954 H. L BERKEY ET AL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet '7 HARRY L. BERKEY GEORGE E. HIEBER WM Yaw Sept. 7, 1954 H. BERKEY ETAL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 8 J 1 llil ll H Y I 3mm HARRY BERKEY GEORGE HIEBER mwxl "Sept. 7, 1954 H. 1.. BERKEY ET L 2,588,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 9 T W I 4 3 2Q 4 3 22 a a as HARRY L. BERKEY GEORGE E. HIEBER Sept. 7, 1954 H. L. BERKEY E 2,638,144
AUTOMATIC PIPE MACHINE Filed May 15, 1947 l9 Sheets-Sheet 1O HARRY L. BERKEY GEORGE E. HIEBER gwvwwbo b P 7, 1954 H. L. BERKEY ETAL AUTOMATIC PIPE MACHINE 19 Sheets-Sheet ll Filed May 13. 1947 HARRY L. BERKEY GEORGE E. HIEBER Sept. 7, 1954 H. 1.. BERKEY ET AL 2,683,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 12 irpnilv film- V V v mv T w Y \nmmi, an em N? H y Q n can JK Sm 7.55mi... 2 m U Sept. 7, 1954 H. L. BERKEY ET AL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 15 C25A-4 LS46-l CIOA-Z li ii PBGB-l Flg. E5 HARRY L. BERKEY GEORGE E. HIEBER Sept. 7, 1954 H. L. BERKEY ET AL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet l6 CISB-I I CWA-S I CIZB-l I C28-3 :C25A-3 l I C29-4:
Cl2A-3 Cl IA Cl5B-2 ClOB-Z Cl awe/M1041 HARRY L. BERKEY GEORGE E. HI EBER Se t. 7, 1954 H. BERKEY ET l- AUTOMATIC PIPE MACHINE 19 Sheets-Sheet 17 Filed May 15, 1947 mhmm mwmm
awe/rm HARRY L. BERKEY NE (mm GEORGE E. H IEBER m \axfk m flmww Sept. 7, 1954 H. BERKEY ETAL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 18 10 IE 3 awe/Mom HARRY L. BERKEY GEORGE E. HIEBER [E15 3% mmuxmxm Sept- 7, 1954 H. 1.. BERKEY ET AL 2,688,144
AUTOMATIC PIPE MACHINE Filed May 13, 1947 19 Sheets-Sheet 1e 1 EEE HARRY L. BERKEY GEORGE E. HIEBER MRMEWM W and the machining operation proceeds.
Patented Sept. 7, 1954 UNITED STA'ilELii AUTOMATIC PIPE MACHINE Harry L. Berkey and George E. Hieher, Waynesboro, Pa., assignors to Landis Machine Company, Waynesboro, Pa., a corporation of Pennsylvania Application May 13, 1947, Serial No. 747,756
14 Claims.
This invention relates to automatic machines for performing machining operations on the ends of pipes, tubes, and the like. More specifically, the invention comprehends the automatic and positive manipulation of a pipe from the blank to the completely machined product, each end thereof being machined by a separate unit of the combined machine.
Machines of the prior art, such as that shown in U. S. Patent No. 2,210,531 to Engelbaugh et al., consist of a machining unit disposed to operate upon each end of the pipe and a transfer table thcrebetween to cause the pipe to move laterally from one machining unit to the other and axially into and out of the proper position for performing the machining operation.
In such machines, the pipe is moved laterally onto a series of rolls aligned with the pipe-holding chuck. Rotation of these rolls then move the pipe longitudinally through the chuck into contact with a work stop. The chuck is then closed At the completion of the machining operation, the chuck is opened, the direction of rotation of the rolls is reversed and the pipe is moved axially out of the chuck.
In a machine of the type shown in U. S. Patent No. 2,405,141 to Hibbard the pipes are moved longitudinally and then transversely towards the chuck, but the transverse movement includes a vertical travel, and a pipe cannot begin this vertical travel until the preceding pipe is removed out of the way after being machined. In this machine the pipes are not positively moved from one station to another, but travel under the infiuence of gravity.
The present invention marks an important advance over the prior art by eliminating several of the above steps to reduce the time required for the actual handling of the pipe to a fraction of the time formerly required. This is especially true for the shorter lengths of pipe which must necessarily travel farther when moving axially from one machine to the other.
It is therefore a principal object of the invention to provide a machine of the above general character having an improved and positive method of automatic control.
It is another major object to provide such a machine in which the length of the pipe to be machined has no effect upon the time required to complete a machining cycle.
A. further object of the invention is to provide an improved system of indexing the pipe laterally into alignment with the machining units.
Another object is to provide a system for accomplishing the axial transfer of the pipe while the machining units are employed on other pipes, thus effecting a major saving of time.
A still further object is to provide a chuck mechanism into which the work may be carried laterally which may be accomplished much more quickly than the act of pushing the work through the chuck axially.
Another object is the provision of an electrohydraulic control circuit which integrates the several units of the machine into one complete whole in which each operation of the machining operation is performed sequentially. Thus positive control is secured, since no single operation can begin before the preceding operation has been completed, regardless of accidental delay from any cause.
Still. another object of the invention is the provision of a machine which will, with a minimum of change, perform any desired operation upon either or both ends of the pipe. This feature is especially desirable in the case of such work as upset tubing, which is threaded externally at one end and internally at the other.
Other objects and advantages of the invention will be apparent from the following description of the exemplified embodiment illustrated in the accompanying drawings in which:
Figure l is a top plan view of the complete machine.
Figure 2 is a side elevation of one of the machining units arranged as a threading machine;
Figure 3 is a rear end elevation of the same machine as in Figure 2;
Figure 4 is a front end elevation of the same machine;
Figure 5 is a side elevation of one of the machining units arranged as a reaming and facing machine;
Figure 6 is a vertical longitudinal sectional View through the spindle of the central portion of the machine shown in Figure 2.
Figure '7 is a transverse vertical sectional view along line 'll of Figure Figure 8 is a fragmentary vertical sectional view along line 8-8 of Figure 6;
Figure 9 is a fragmentary horizontal sectional View taken. along line 9-9 of Figure 6;
Figure 10 is a horizontal sectional view taken substantially along line Ni -ill of Figure 6;
Figure 11 is a vertical longitudinal sectional view through the spindle of the machine shown in Figure 5;
Figure 12 is a vertical sectional view showing the gripper mechanism and taken substantially along line E ?.i2 of Figure 2;
Figure 13 is a vertical sectional view taken substantially along line iii-l3 of Figure 12;
Figure 1a is a top plan view of one of the pedestals for supporting the transfer mechanism, the particular pedestal shown being the one in the upper right hand corner of Figure 1;
Figure 15 is a side elevation of the pedestal shown in Figure 14;
US747756A 1947-05-13 1947-05-13 Automatic pipe machine Expired - Lifetime US2688144A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747445A (en) * 1951-09-06 1956-05-29 Taylor Wilson Mfg Company Pipe gripper actuated by guided yoke
US2832236A (en) * 1955-06-02 1958-04-29 Stardrill Keystone Company Machine for dressing tools
US2923952A (en) * 1960-02-09 T sawdey
US3514799A (en) * 1968-03-08 1970-06-02 Standco Ind Inc Method and apparatus for handling,preparing and feeding rods for a thread forming machine
US3994403A (en) * 1974-07-18 1976-11-30 Hatebur Umformmaschinen Ag Gripping devices for multi-stage upsetting presses
US20180065193A1 (en) * 2015-03-18 2018-03-08 3 S Schnecken + Spindeln + Spiralen Bearbeitungesellschaft M.B.H. Method for manufacturing a stator or machining the inner wall of a stator

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US264597A (en) * 1882-09-19 adriance
US1285584A (en) * 1918-03-22 1918-11-26 Nat Tube Co Machine for handling pipes.
US1902657A (en) * 1931-11-23 1933-03-21 George E Merwin Thread cutting attachment for lathes
US1904375A (en) * 1929-11-18 1933-04-18 Gaterman Mfg Co W Tapping and drilling machine
FR758302A (en) * 1932-10-17 1934-01-15 Method and device for screwing threaded sleeves or nuts onto pipes or the like
US1967508A (en) * 1934-03-05 1934-07-24 William K Stamets Machine for threading couplings
US2017964A (en) * 1935-05-02 1935-10-22 Royal Typewriter Co Inc Typewriting machine
US2043556A (en) * 1934-12-28 1936-06-09 Pittsburgh Steel Co Transfer apparatus
US2067626A (en) * 1935-01-28 1937-01-12 William L Benninghoff Pipe threading machine
US2108779A (en) * 1933-08-15 1938-02-15 Nat Automatic Tool Co Multiple machine tool
US2116639A (en) * 1936-10-14 1938-05-10 Pittsburgh Steel Co Metal threading apparatus
US2176188A (en) * 1937-09-13 1939-10-17 Gen Motors Corp Tube flaring machine
US2191915A (en) * 1939-04-11 1940-02-27 Pittsburgh Steel Co Thread-cutting machine
US2210531A (en) * 1940-02-29 1940-08-06 Youngstown Sheet And Tube Co Automatic control system for pipe threading machines and the like
US2260611A (en) * 1938-11-18 1941-10-28 American Smelting Refining Material handling mechanism
US2302878A (en) * 1939-04-26 1942-11-24 Nat Automatic Tool Co Machine tool
US2309637A (en) * 1939-09-05 1943-02-02 Fitchburg Engineering Corp Climb milling machine
US2318177A (en) * 1940-08-03 1943-05-04 Landis Machine Co Hydraulically operated combined threading and turning machine
US2404161A (en) * 1945-05-28 1946-07-16 Pines Engineering Company Indexing and chucking device
US2405141A (en) * 1943-12-23 1946-08-06 William K Stamets Conveyer table
US2417091A (en) * 1941-08-08 1947-03-11 Landis Machine Co Metal working machine
US2576114A (en) * 1945-04-03 1951-11-27 William K Stamets Machine tool work holder

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US264597A (en) * 1882-09-19 adriance
US1285584A (en) * 1918-03-22 1918-11-26 Nat Tube Co Machine for handling pipes.
US1904375A (en) * 1929-11-18 1933-04-18 Gaterman Mfg Co W Tapping and drilling machine
US1902657A (en) * 1931-11-23 1933-03-21 George E Merwin Thread cutting attachment for lathes
FR758302A (en) * 1932-10-17 1934-01-15 Method and device for screwing threaded sleeves or nuts onto pipes or the like
US2108779A (en) * 1933-08-15 1938-02-15 Nat Automatic Tool Co Multiple machine tool
US1967508A (en) * 1934-03-05 1934-07-24 William K Stamets Machine for threading couplings
US2043556A (en) * 1934-12-28 1936-06-09 Pittsburgh Steel Co Transfer apparatus
US2067626A (en) * 1935-01-28 1937-01-12 William L Benninghoff Pipe threading machine
US2017964A (en) * 1935-05-02 1935-10-22 Royal Typewriter Co Inc Typewriting machine
US2116639A (en) * 1936-10-14 1938-05-10 Pittsburgh Steel Co Metal threading apparatus
US2176188A (en) * 1937-09-13 1939-10-17 Gen Motors Corp Tube flaring machine
US2260611A (en) * 1938-11-18 1941-10-28 American Smelting Refining Material handling mechanism
US2191915A (en) * 1939-04-11 1940-02-27 Pittsburgh Steel Co Thread-cutting machine
US2302878A (en) * 1939-04-26 1942-11-24 Nat Automatic Tool Co Machine tool
US2309637A (en) * 1939-09-05 1943-02-02 Fitchburg Engineering Corp Climb milling machine
US2210531A (en) * 1940-02-29 1940-08-06 Youngstown Sheet And Tube Co Automatic control system for pipe threading machines and the like
US2318177A (en) * 1940-08-03 1943-05-04 Landis Machine Co Hydraulically operated combined threading and turning machine
US2417091A (en) * 1941-08-08 1947-03-11 Landis Machine Co Metal working machine
US2405141A (en) * 1943-12-23 1946-08-06 William K Stamets Conveyer table
US2576114A (en) * 1945-04-03 1951-11-27 William K Stamets Machine tool work holder
US2404161A (en) * 1945-05-28 1946-07-16 Pines Engineering Company Indexing and chucking device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923952A (en) * 1960-02-09 T sawdey
US2747445A (en) * 1951-09-06 1956-05-29 Taylor Wilson Mfg Company Pipe gripper actuated by guided yoke
US2832236A (en) * 1955-06-02 1958-04-29 Stardrill Keystone Company Machine for dressing tools
US3514799A (en) * 1968-03-08 1970-06-02 Standco Ind Inc Method and apparatus for handling,preparing and feeding rods for a thread forming machine
US3994403A (en) * 1974-07-18 1976-11-30 Hatebur Umformmaschinen Ag Gripping devices for multi-stage upsetting presses
US20180065193A1 (en) * 2015-03-18 2018-03-08 3 S Schnecken + Spindeln + Spiralen Bearbeitungesellschaft M.B.H. Method for manufacturing a stator or machining the inner wall of a stator
US10751819B2 (en) * 2015-03-18 2020-08-25 3 S Schnecken + Spindeln + Spiraten Bearbeitungsgesellschaft m.b.H. Method for manufacturing a stator or machining the inner wall of a stator

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