GB2030907A - Drawing block assemblies for wire drawing machines - Google Patents
Drawing block assemblies for wire drawing machines Download PDFInfo
- Publication number
- GB2030907A GB2030907A GB7835100A GB7835100A GB2030907A GB 2030907 A GB2030907 A GB 2030907A GB 7835100 A GB7835100 A GB 7835100A GB 7835100 A GB7835100 A GB 7835100A GB 2030907 A GB2030907 A GB 2030907A
- Authority
- GB
- United Kingdom
- Prior art keywords
- block
- shaft
- wire
- disc
- drawing block
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/14—Drums, e.g. capstans; Connection of grippers thereto; Grippers specially adapted for drawing machines or apparatus of the drum type; Couplings specially adapted for these drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Unwinding Of Filamentary Materials (AREA)
Abstract
A drawing block assembly for a wire drawing machine includes a drawing block 9 mounted on a shaft 8 for rotary movement therewith. A shaft extension 15 extends beyond the upper end of the drawing block and on the extension is pivotally mounted a friction disc 5. The friction disc slips against the upper end of the drawing, block and is adapted to control wire as it is unwound from the block. An indicator (not shown) on the friction disc permits a sensing member 10 to detect any angular movement of the disc. The sensing member sends a signal to a device for controlling the speed of rotation of the shaft. <IMAGE>
Description
SPECIFICATION
Drawing block assemblies for wire drawing machines
The present invention relates to drawing block assemblies for wire drawing machines.
It is known from UK patent no: 1225106 for a drawing block assembly to include a stand within which is journalled a vertical shaft. Attached to the shaft for rotary movement therewith is a drawing block. The vertical shaft is tubular and extending through it is a spindle. The upper end of the spindle extends behond the upper end of the shaft and above the upper end of the drawing block and firmly attached to it is a friction arm. The friction arm carries a rotatable pulley. Between the friction arm and the upper end of the drawing block there is provided an adjustable spring biased friction element so arranged that a friction surface fixed on the arm is in adjustable contact with a friction surface fixed to the upper end of the block. The lower end of the spindle extends beyond the lower end of the shaft and is connected to an angle registering device.
When wire is being unwound from the drawing block the rotable pulley carried by the friction arm is held agains the wire with a force created by the slip between the friction surfaces on the friction arm and the upper end of the drawing block. This force maintains tension in the wire.
In other words, the friction arm and the roller carried by it are used during the operation of the drawing block to maintain a suitable tension in the wire as it is unwound and when a state qf equilibrium is reached between the frictional force between the friction arm and the end of the block and the resistance of the wire then the friction arm will remain stationary relative to the end of the drawing block.
Since any change in the amount of wire on the block affects the tension in the wire and will thus upset the equilibrium then the friction arm will move in one direction or another to maintain the state of equilibrium. This swinging motion of the friction arm is transmitted by means of the angle registering device which sends a signal corresponding to the magnitude of the angle to means for regulating the speed of the motor which drives the shaft. The speed regulating means as a result of receipt of the signal will cause the change in the rotational speed of the block to compensate for the movement of the friction arm thereby maintaining a constant amount of wire on the block.
This known drawing block assembly is advantageous in that it permits of a constant and automatic control of the wire being taken from and being wound upon the drawing block.
However, it has the disadvantage that access for maintenance purposes is very limited since the spindle or substantial part of it is surrounded by the shaft and the drawing block. Furthermore, the angle registering device is located at the bottom end of the spindle within the stand that is also inaccessible.
According to the present invention, a drawing block assembly for a wire drawing machine comprises a drawing block mounted on a shaft for rotary movement therewith, means for rotating the shaft, a shaft extension joined to the shaft or the block and extending beyond an end of the drawing block, a friction member pivotally mounted on the shaft extension which friction member siips against the said end of the drawing block and is adapted to control wire as it is unwound from the block, an indicator on the friction member and means for sensing the position of the indicator and thereby any angular movement of the friction member.
Preferably the friction member is a disc and the indicator is a slot in the disc the presence of which slot is sensed by an electrical pick up head mounted on a standard immediately adjacent the periphery of the disc.
An embodiment of the invention will now be described, by way of example, a reference being made to the Figure of the accompanying diagrammatic drawing which Figure is a side view, partly in cross section, of a drawing block assembly.
As shown, a drawing block assembly for a wire drawing machine includes a stand 13 within which isjournalled a vertical shaft 8. The shaft 8 is driven by a variable speed motor (not shown) and gearing. A drawing block 9 is mounted on the shaft 8 for rotary movement therewith. An upper (as shown) shaft extension 1 5 extends beyond the upper (as shown) end 16 of the drawing block 9 to which it is attached. A friction member in the form of a disc 5 is mounted for pivotal movement on the shaft extension 15. The lower surface of the disc 5 bears against a friction surface 7 attached to the upper end 1 6 of the drawing block 9. Means 1 are provided for adjusting the friction between the disc 5 and the drawing block 9. Adjacent its periphery, the disc 5 carries a rotatabie guide roller 6.
Extending from the stand 13 is a standard 11 which carries a roller 12 spaced from but in general alignment with a longitudinal centre line of the shaft 8. Wire 17 to be unwound passes over the roller 12 as shown. Mounted on the stand 11 immediately adjacent the periphery of the disc 5 is an electrical pick up head 10. An indicator (not shown) is provided on the disc 5, the presence of which indicator is sensed by the pick up head 10 on pivotal movement of the disc 5.
In use, wire 17 being unwound from the drawing block 9 passes over the roller 12 and the disc 5 is pivoted about the shaft extension 1 5 by the guide roller 6 engaging the wire 17 and thereby tensioning the wire. The disc 5 will pivot until the force created by the slip between the disc 5 and the drawing block Y equals the tension in the wire 1 7. This force is adjustable by the means 1 to provide the required tension in the wire 1 7.
However, the tension in the wire 1 7 varies according to the amount of wire on the drawing block 9 and the disc 5 will pivot about the shaft 8 in an attempt to maintain equilibrium.
The pivotal movement of the disc 5 and the concurrent movement of the indicator is sensed by the pick up head 10 and a signal is sent by the pick up head 10 to a device which controls the speed of the variable speed motor driving the block. The speed of rotation of the shaft 8 is thereby varied and in this way the wire being wound on the drawing block 9 is automatically controlled to equal the wire 1 7 being removed from the drawing block 9.
The embodiment described above has the advantage that the pick up head 10, the indicator and the disc 5 are all easily accessable. This makes maintenance a simple matter and also the adaption of existing draw block assemblies is easily performed.
Though the friction member in the above embodiment is shown as a disc 5 quite clearly an arm would suffice. Furthermore the indicator can be of any known type, for example, a slot or slots formed in the surface of the disc or a magnetic surface attached to the surface of the disc.
Although the shaft extension 1 5 is shown and described in the embodiment described above, as being attached to the end of the drawing block 9, the shaft extension 1 5 could be attached directly to the upper (as shown) end of the shaft 8.
Claims (3)
1. A drawing block assembly for a wire drawing machine comprising a drawing block mounted on a shaft for rotary movement therewith, means for rotating the shaft, a shaft extension joined to the shaft or the block and extending beyond an end of the drawing block, a friction member pivotally mounted on the shaft extension which friction member slips against the said end of the drawing block and is adapted to control wire as it is unwound from the block, an indicator on the friction member and means for sensing the position of the indicator and thereby any angular movement of the friction member.
2. A drawing block as claimed in claim 1 , in which the friction member is a disc and the indicator is a slot in the disc, the presence of which slot is sensed by an electrical pick up head mounted on a standard immediately adjacent the periphery of the disc.
3. A drawing block assembly for a wire drawing machine constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the Figure of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7835100A GB2030907A (en) | 1977-07-27 | 1978-08-31 | Drawing block assemblies for wire drawing machines |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3161877 | 1977-07-27 | ||
| GB7835100A GB2030907A (en) | 1977-07-27 | 1978-08-31 | Drawing block assemblies for wire drawing machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2030907A true GB2030907A (en) | 1980-04-16 |
Family
ID=26261004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7835100A Withdrawn GB2030907A (en) | 1977-07-27 | 1978-08-31 | Drawing block assemblies for wire drawing machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2030907A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521539A (en) * | 2013-10-17 | 2014-01-22 | 贵州钢绳股份有限公司 | Spiral machine core frame device for wire drawing machine |
| CN104415985A (en) * | 2013-09-04 | 2015-03-18 | 常州市正阳焊接材料有限公司 | Friction disc of wire drawing machine |
| CN108637025A (en) * | 2018-06-04 | 2018-10-12 | 海盐兴隆紧固件有限公司 | A kind of fastener production automation wire pulling machine |
| CN113522998A (en) * | 2021-07-20 | 2021-10-22 | 江苏泰隆机电科技有限公司 | Turnover type water tank wire drawing machine capable of intelligently measuring parameters and using method thereof |
-
1978
- 1978-08-31 GB GB7835100A patent/GB2030907A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104415985A (en) * | 2013-09-04 | 2015-03-18 | 常州市正阳焊接材料有限公司 | Friction disc of wire drawing machine |
| CN103521539A (en) * | 2013-10-17 | 2014-01-22 | 贵州钢绳股份有限公司 | Spiral machine core frame device for wire drawing machine |
| CN108637025A (en) * | 2018-06-04 | 2018-10-12 | 海盐兴隆紧固件有限公司 | A kind of fastener production automation wire pulling machine |
| CN113522998A (en) * | 2021-07-20 | 2021-10-22 | 江苏泰隆机电科技有限公司 | Turnover type water tank wire drawing machine capable of intelligently measuring parameters and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |