To go from milling machine to mold press to perfect molded part with the first shot is the dream of many mold shops.
"There's no reason a mold shop can't achieve that goal," says Keith Kauzlarich, vice president of Single Source Technologies (SST) in Auburn Hills, Michigan. "The process to machine molds that need no benching or spotting exists today. Most mold shops in the United States simply haven't embraced the technology that this process requires," he says.
A high percentage of mold shops habitually leave at least 0.001 to 0.003 inch of extra material on cavities and cores. This practice ensures the shop that there is sufficient stock to allow for hand grinding, polishing and other adjustments without exceeding the dimensional tolerances on the mold. It also allows for a safety factor to compensate for the margin of error in parts of the customary moldmaking technology, such as:
* CNC programs that cannot generate tool paths that match the geometry to a tighter tolerance band than the stock allowance.
Wednesday, February 14, 2007
Machine tool trade with Japan and Taiwan
The President has directed that the US Trade Representative negotiate a limited extension of the voluntary restraint agreements (VRAs) with Japan and Taiwan on machine tools. These VRAs were negotiated in 1986 for national security reasons and were scheduled to expire on December 31, 1991.
Import restrictions on machining centers, computer-controlled lathes, computer-controlled punching and shearing machine tools, and computer-controlled milling machine tools will be removed progressively over a 2-year period beginning in January 1992.
To allow sufficient time for negotiations with concerned countries over the phase-out schedule, we are requesting that Japan and Taiwan extend the existing VRA restrictions on machining centers, computer-controlled lathes, computer-controlled punching and shearing machine tools, and computer controlled milling machine tools, scheduled to expire on December 31, 1991, for an additional 30 days.
VRA restrictions on non-computer controlled lathes, non-computer controlled punching and shearing machine tools, and non-computer controlled milling machine tools will expire as scheduled on December 31, 1991
The Secretary of Commerce, as chairman of the cabinet-level Trade Promotion Coordinating Committee, will give special focus to ways to promote machine tools exports.
* US export control regulations will be reviewed to ensure that restrictions on machine tools are kept to the minimum consistent with national security.
* The Secretaries of Defense, Commerce, and Labor will designate officials at the Assistant Secretary level to work together to monitor the industry's performance and to consult regularly with industry representatives.
* The Secretary of Labor will help the machine tool industry improve technical training, human resource management, and the utilization of new and emerging technologies.
* The Secretaries of Commerce and Energy will examine which research and development efforts in the national laboratories could benefit the domestic machine tool industry and will recommend appropriate investment and technology transfer to realize such benefit.
* The Secretaries of Commerce and Defense will continue to implement the Domestic Action Plan of programs to support the revitalization of the US machine tool industry. Key elements of the Domestic Action Plan are as follows:
-- Support for the National Center for Manufacturing Sciences (amounting to $50 million during fiscal years 1988-91); and
-- Support by the Defense Department's Manufacturing Technology (MANTECH) research and development program. More than $33 million has been spent for research on machine tools and related technologies over the past 3 years. Funding for related technologies is estimated at $82 million over the FY 1991-95 period.
Import restrictions on machining centers, computer-controlled lathes, computer-controlled punching and shearing machine tools, and computer-controlled milling machine tools will be removed progressively over a 2-year period beginning in January 1992.
To allow sufficient time for negotiations with concerned countries over the phase-out schedule, we are requesting that Japan and Taiwan extend the existing VRA restrictions on machining centers, computer-controlled lathes, computer-controlled punching and shearing machine tools, and computer controlled milling machine tools, scheduled to expire on December 31, 1991, for an additional 30 days.
VRA restrictions on non-computer controlled lathes, non-computer controlled punching and shearing machine tools, and non-computer controlled milling machine tools will expire as scheduled on December 31, 1991
The Secretary of Commerce, as chairman of the cabinet-level Trade Promotion Coordinating Committee, will give special focus to ways to promote machine tools exports.
* US export control regulations will be reviewed to ensure that restrictions on machine tools are kept to the minimum consistent with national security.
* The Secretaries of Defense, Commerce, and Labor will designate officials at the Assistant Secretary level to work together to monitor the industry's performance and to consult regularly with industry representatives.
* The Secretary of Labor will help the machine tool industry improve technical training, human resource management, and the utilization of new and emerging technologies.
* The Secretaries of Commerce and Energy will examine which research and development efforts in the national laboratories could benefit the domestic machine tool industry and will recommend appropriate investment and technology transfer to realize such benefit.
* The Secretaries of Commerce and Defense will continue to implement the Domestic Action Plan of programs to support the revitalization of the US machine tool industry. Key elements of the Domestic Action Plan are as follows:
-- Support for the National Center for Manufacturing Sciences (amounting to $50 million during fiscal years 1988-91); and
-- Support by the Defense Department's Manufacturing Technology (MANTECH) research and development program. More than $33 million has been spent for research on machine tools and related technologies over the past 3 years. Funding for related technologies is estimated at $82 million over the FY 1991-95 period.
Turning Holder Style Burnishing Tool - UBT-T Universal - Brief Article - Product Announcement
The new UBT-T Universal turning holder style burnishing tool generates low surface finishes on shafts, faces, tapers and contours. Standardized and available off the shelf, the indexable tool utilizes a single burnishing roll available in hardened steel or carbide. It is adjustable for optimum burnishing pressure. The company also offers the UBT-T Universal boring bar style burnishing tool for burnishing a variety of part configurations, including shafts, faces, tapers, contours and large IDs (greater than 2.75" or 69.85 mm) with a single roll.
Machine tool considerations come to the surface - Cover Story
When all the design, NC code generation and fixturing are complete, it's a machine tool that gets down to the business of contoured surfaces: cutting. Here are some things to consider about the machine you choose for the job.
A trip through any supermarket provides more than enough evidence to explain why machining of contoured surfaces is a growing segment of manufacturing. For example, each of the thousands of uniquely shaped plastic containers, found along the miles of aisles, gets its shape from a mold. And the mold gets its shape from a machine tool. It's estimated that 60 percent of all parts made today--a percentage that's growing--are made from plastic.
But there are more contoured surfaces to machine than just molds, although as our supermarket tour illustrates, they do make up a large chunk of the surface machining universe. Manufacturing is applying contoured surface machining technology across many industries such as automotive, power generation, aerospace, die and mold making, and health care.
Design considerations that take into account form as well as function increase the demands that are placed on manufacturers for contoured surfaces. Ergonomics--the physical interface between people and equipment--is also a force behind smoothing the square edges of many products. These design directives are showing up in virtually all manufactured products, whether they are made from composites, aluminum or titanium.
A trip through any supermarket provides more than enough evidence to explain why machining of contoured surfaces is a growing segment of manufacturing. For example, each of the thousands of uniquely shaped plastic containers, found along the miles of aisles, gets its shape from a mold. And the mold gets its shape from a machine tool. It's estimated that 60 percent of all parts made today--a percentage that's growing--are made from plastic.
But there are more contoured surfaces to machine than just molds, although as our supermarket tour illustrates, they do make up a large chunk of the surface machining universe. Manufacturing is applying contoured surface machining technology across many industries such as automotive, power generation, aerospace, die and mold making, and health care.
Design considerations that take into account form as well as function increase the demands that are placed on manufacturers for contoured surfaces. Ergonomics--the physical interface between people and equipment--is also a force behind smoothing the square edges of many products. These design directives are showing up in virtually all manufactured products, whether they are made from composites, aluminum or titanium.
Subscribe to:
Posts (Atom)
