Drawing Machine

• US 20090013542A1
• Filed: 09/19/2008
• Published: 01/15/2009
• Est. Priority Date: 12/29/2006
• Status: Active Grant

• Current Assignee: Elite Machine And Design Ltd.
• Original Assignee: Elite Machine And Design Ltd.
• Inventors: Ho, Po-Lin
• Granted Patent: US 7,661,285 B2
• Time in Patent Office: Days
• US Class Current: 33/23.80
• CPC Class Codes: B21C 1/28 Carriages; Connections of grippers thereto; Grippers
• CPC Class Codes: B21C 1/30 Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive endlessly revolving chain systems for metal coiling: B21C47/3458

Abstract

A drawing machine comprises a plate unit, a clamping device, a transmit member, a driving device and a cam. The transmit member includes a following roller. The driving device includes a main linkage inserted through the plate unit and having first and second ends. The cam includes first and second cam paths, with first cam path disposed between two sides of the second cam path. When the cam is in a first position, the distances between the first cam path and two sides of the second cam path are different. When the cam is in a second position, the distances between the first cam path and two sides of the second cam path are equal. The following roller drives the main linkage to pivot, with the clamping driven to clamp a rod or pipe. The plate unit is driven by the second cam path and reciprocates along the cam axially.

Claims

1. A drawing machine comprising:

a first plate having first and second surfaces;

a clamping device installed on the first surface of the first plate;

a transmit member including first and second ends and a following roller disposed between the first and second ends, with the first end of the transmit member pivotally connected to the second surface of the first plate;

a driving device interconnecting the second end of the transmit member and the clamping device;

wherein the transmit member is adapted to pivot with respect to the driving device;

wherein the driving device moves reciprocatingly with respect to the first plate; and

a cam including a first cam path and a second cam path, with the first cam path disposed between two sides of the second cam path;

wherein when the cam is in a first position, the distances between the first cam path and the two sides of the second cam path are different;

when the cam is in a second position, the distances between the first cam path and the two sides of the second cam path are equal;

wherein the following roller of the transmit member is provided in the first cam path, with the second end of the transmit member driving the driving device so that the clamping device is driven to clamp a rod or pipe, and with the first plate driven by the second cam path for reciprocating along the cam axially.

2. The drawing machine as claimed in claim 1, wherein the driving device further comprises a main linkage having first and second ends, an active crank fixed to the first end of the main linkage and pivotally connected to the second end of the transmit member, a passive cranks fixed to the second end of the main linkage, a pin-jointed unit pivotally connected to the passive cranks, a push element fixed to the pin-jointed unit and a fixed base member respectively fixed to the push element and the clamping device.

3. The drawing machine as claimed in claim 2, with the transmit member adapted to pivot with respect to the active crank, with the passive crank adapted for driving the pin-jointed unit to move reciprocatingly with respect to the first plate, and with the main linkage being pivotal via the second end of the transmit member.

4. The drawing machine as claimed in claim 1, further comprising two columns transversely inserted through two sides of the pin-jointed unit and two cushion units installed to the columns, with the push element inserted through one of the cushion units to fix to the fixed base member.

5. The drawing machine as claimed in claim 4, further comprising a second plate connected to the first plate of the plate unit via numbers of guiding rollers and four fixed elements respectively fixed to two ends of each cushion unit, with the fixed elements installed to the second plate.

6. The drawing machine as claimed in claim 5, further comprising a base portion fixed on the second plate and mounted on the main linkage for supporting the passive crank.

7. The drawing machine as claimed in claim 5, further comprising two guiding rails provided on two sides of the plate unit with respect to the guiding rollers, with the guiding rollers limited to reciprocate in the guiding rails.

8. The drawing machine as claimed in claim 1, with the fixed base member including first and second bases coupled to each other slidably, with the first and second bases respectively connected to the clamping device.

9. The drawing machine as claimed in claim 1, further comprising first and second guide members fixed on the second surface of the first plate, with the first and second guide members provided to engage with the two sides of the second cam path.

10. The drawing machine as claimed in claim 1, wherein the clamping device further comprises two rails extending on the first surface of the first plate of the plate unit, two upper slides movably mounted on the rails respectively and two jaws carried on the upper slides respectively.

11. A drawing machine comprising:

a first plate having first and second surfaces;

a clamping device installed on the first surface of the first plate;

a transmit member including first and second ends and a following roller disposed between the first and second ends, with the first end of the transmit member pivotally connected to the second surface of the first plate;

a driving device including a main linkage, active and passive cranks, a pin-jointed unit, a push element and a fixed base member;

wherein the main linkage has first and second ends, with the first end of the main linkage fixed to the active crank, with the active crank pivotally connected to the second end of the transmit member, with the second end of the main linkage fixed to the passive crank, with the passive crank pivotally connected to the pin-jointed unit, with the pin-jointed unit fixed to the push element, with the push element fixed to the fixed base member, and with the fixed base member fixed to the clamping device;

wherein the transmit member is adapted to pivot with respect to the active crank, wherein the passive crank pivots to drive the pin-jointed unit to move reciprocatingly with respect to the first plate; and

a cam including a first cam path and a second cam path, with the first cam path disposed between two sides of the second cam path;

wherein when the cam is in a first position, the distances between the first cam path and the two sides of the second cam path are different;

when the cam is in a second position, the distances between the first cam path and the two sides of the second cam path are equal;

wherein the following roller of the transmit member is provided in the first cam path, with the second end of the transmit member driving the main linkage to pivot, with the clamping device driven to clamp a rod or pipe, and with the first plate driven by the second cam path for reciprocating along the cam axially.

12. The drawing machine as claimed in claim 11, with the second end of the transmit member having a long hole and a bearing disposed in the hole of the second end of the transmit member.

13. The drawing machine as claimed in claim 11, with the pin-jointed unit including a main body, a long hole longitudinally formed in the main body and a bearing disposed in the hole of the pin-jointed unit.

14. The drawing machine as claimed in claim 11, further comprising two columns transversely inserted through two sides of the pin-jointed unit and two cushion units installed to the columns, with the push element inserted through one of the cushion units to fix to the fixed base member.

15. The drawing machine as claimed in claim 14, further comprising a second plate connected to the first plate of the plate unit via numbers of guiding rollers and four fixed elements respectively fixed to two ends of each cushion unit, with the fixed elements installed to the second plate.

16. The drawing machine as claimed in claim 15, further comprising a base portion fixed on the second plate and mounted on the main linkage for supporting the passive crank.

17. The drawing machine as claimed in claim 15, further comprising two guiding rails provided on two sides of the plate unit with respect to the guiding rollers, with the guiding rollers limited to reciprocate in the guiding rails.

18. The drawing machine as claimed in claim 11, with the fixed base member including first and second bases coupled to each other slidably, with the first and second bases respectively connected to the clamping device.

19. The drawing machine as claimed in claim 11, further comprising first and second guide members fixed on the second surface of the first plate, with the first and second guide members provided to engage with the two sides of the second cam path.

20. The drawing machine as claimed in claim 11, wherein the clamping device further comprises two rails extending on the first surface of the first plate of the plate unit, two upper slides movably mounted on the rails respectively and two jaws carried on the upper slides respectively.