Title:
MULTI-STAGE TUBE HYDROFORMING PROCESS
Document Type and Number:
WIPO Patent Application WO/2014/126808
Kind Code:
A3
Abstract:
A method for hydroforming a tubular blank (10) comprising the steps of at least partially closing the die portions (14, 16) of a die (12) about a tubular blank (10), introducing a hydraulic fluid (22) into the tubular blank (10) at a first pressure, substantially closing the die portions (14, 16) about the tubular blank (10), partially opening the die portions (14, 16) while at least initially maintaining the pressure of the hydraulic fluid (22), and substantially closing the die portions (14, 16) at least a second time.
Inventors:
CHRISTIANSON SCOTT (US)
MASON MURRAY (CA)
MASON MURRAY (CA)
Application Number:
PCT/US2014/015353
Publication Date:
February 05, 2015
Filing Date:
February 07, 2014
Export Citation:
Assignee:
CATERPILLAR INC (US)
International Classes:
B21D26/041; B21D26/033
Foreign References:
| JP2004255445A | 2004-09-16 | |||
| JP2001009528A | 2001-01-16 | |||
| US6912884B2 | 2005-07-05 | |||
| JP2005095983A | 2005-04-14 | |||
| US6257035B1 | 2001-07-10 |
Other References:
See also references of EP 2956253A4
Attorney, Agent or Firm:
SPILLMAN, M., Daniel et al. (P.O. Box 2409Minneapolis, MN, US)
Download PDF:
Previous Patent: METHOD AND APPARATUS FOR LATENCY REDUCTION
Next Patent: APPARATUS AND METHOD FOR DETECTION OF INSECTS
Next Patent: APPARATUS AND METHOD FOR DETECTION OF INSECTS