GB747357A - Improvements in or relating to a threading unit for use with a workpiece holder - Google Patents
Improvements in or relating to a threading unit for use with a workpiece holderInfo
- Publication number
- GB747357A GB747357A GB30932/53A GB3093253A GB747357A GB 747357 A GB747357 A GB 747357A GB 30932/53 A GB30932/53 A GB 30932/53A GB 3093253 A GB3093253 A GB 3093253A GB 747357 A GB747357 A GB 747357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spindle
- brake
- yoke
- switch
- movement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Turning (AREA)
Abstract
747,357. Screwing. SHEFFIELD CORPORATION. Nov. 9, 1953 [Nov. 18, 1952], No. 30932/53. Class 83 (3). A machine for screwing or tapping comprises means 21 on a spindle 16 for detachably connecting a threading tool 15, drive means 35 on means 42 which supports the spindle for sliding movement and rotates it always in the same direction, a lead unit including a screw 18 fixed to the spindle, means 106 for disengaging the lead unit, and a return mechanism 61, 62 for rapidly returning the spindle after a threading operation. A key 43 in the spindle 16 conveys the rotary motion from the sleeve 42 and permits the sliding movement. The worm-wheel 35 is rotated by a motor 2A through a belt 26 and change gearing 30 ... 32. The spindle is rapidly returned after threading by a motor 1A driving through a chain 56, a planetary gear clutch 65, 66, 67, 70, the pinion 61 and the rack 62 on the spindle. With a brake 72 engaged, the gear 65 rotates the wheel 67 to return the spindle. With a brake 74 engaged, the wheels 65, 66, 70 rotate idly and the spindle is held fast, thus allowing the unit to be mounted vertically. In operation, motor switches are pressed to start the motors 1A, 2A and a cycle-start-switch is pressed to energize a solenoid to move the yoke 106. The yoke 106 carries with it a sleeve 102 having a cam surface to close nut-segments 19 on to the lead screw 18. A solenoid is also actuated to release the brake 74. The spindle advances together with the die head 15 which is opened and closed by abutments on a rod 112. An adjustable abutment 90 carried along with the spindle actuates a switch 109 at the forward limit of movement to move the yoke 106 and release the nut segments. Movement of the yoke 106 also actuates a switch 120 to operate the brake 72, causing the spindle to be returned. At the rear limit a further adjustable abutment 91 actuates a switch 110 which de-energizes a solenoid to allow the brake 74 to be applied by spring means, thus holding the spindle against axial movement. This brake is also applied automatically in the event of power failure, or by pressure on a stop-button which cuts off all current. Lubricating machines.-A cam-driven pump 29 in a sump in a casing 13 supplies oil to a bearing 51, to the spindle and, if desired, to the lead unit. The spindle 16 is helically grooved externally and the sleeve 42 internally, for lubrication.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747357XA | 1952-11-18 | 1952-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB747357A true GB747357A (en) | 1956-04-04 |
Family
ID=22121364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30932/53A Expired GB747357A (en) | 1952-11-18 | 1953-11-09 | Improvements in or relating to a threading unit for use with a workpiece holder |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB747357A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103358348A (en) * | 2013-07-12 | 2013-10-23 | 永高股份有限公司 | Double-station full-automatic processing device for screw holes in junction box |
-
1953
- 1953-11-09 GB GB30932/53A patent/GB747357A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103358348A (en) * | 2013-07-12 | 2013-10-23 | 永高股份有限公司 | Double-station full-automatic processing device for screw holes in junction box |
CN103358348B (en) * | 2013-07-12 | 2015-02-25 | 永高股份有限公司 | Double-station full-automatic processing device for screw holes in junction box |
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