Binary rotation- monotranslation three-freedom redundancy parallel mechanism for parallel machine tool
A degree of freedom and redundant technology, applied in manipulators, program-controlled manipulators, metal processing mechanical parts, etc., can solve the problem that the precision advantages of parallel machine tools cannot be manifested, the manufacturing difficulties of high-precision and rigid hinges, and the small working space of parallel mechanisms, etc. problems, to achieve the effect of improving mechanical transmission performance, increasing rigidity, and improving motion accuracy
Inactive Publication Date: 2006-01-25
BEIHANG UNIV
View PDF1 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
For example, in terms of accuracy, the accuracy of parallel machine tools depends to a large extent on key components such as spherical hinges and Hooke hinges, and it is difficult to manufacture high-precision and rigid hinges.
This makes the accuracy advantages of parallel machine tools unable to show, and sometimes it performs worse than serial machine tools
In addition, the working space of the parallel mechanism is small, especially the attitude space is small, and the problems such as the singularity inside the configuration cannot be overcome by the mechanism itself.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] Combine below figure 1 and figure 2 The present invention is described in detail. Among them, in figure 1 The reference signs in the figure represent respectively: 1 moving platform; 2 spherical hinge; 3, 6, 7 non-redundant branch chain; 4 revolving pair; from figure 1 It can be seen that it is composed of a dynamic platform 1, a static platform 5 and four branch chains. Among them, one end of the non-redundant branch chains 3, 6 and 7 is connected to the static platform 5 through the same hinge as the rotating joint 4, and the other end is connected to the moving platform 1 through the same hinge as the spherical joint 2. 9 is the redundant branch chain of the mechanism, and its two ends The two platforms are connected by ball joints 8 and 10. During the movement of the mechanism, the position and attitude of the moving platform 1 relative to the static platform 5 can be changed by controlling the lengths of the branch chains 3, 6, 7, and 9. exist figure 2 The...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to one redundant parallel mechanism with two rotations and one translation. The parallel mechanism includes static platform, dynamic platform, three single-freedom non-redundant branches and one single-freedom redundant branch. Each of the three single-freedom non-redundant branches has one end connected via rotation pair to the static platform and the other end connected via ball joint to the dynamic platform. The single-freedom redundant branch has ball joints on its two ends. The present invention can raise the precision and rigidity of the parallel mechanism, expands the oscillation posture space, and is suitable for use in digitally controlled parallel machine tool with high precision and great posture angle.
Description
technical field [0001] The invention belongs to the field of mechanical manufacturing, and in particular relates to a three-degree-of-freedom redundant parallel mechanism applicable to parallel machine tools. Background technique [0002] Parallel machine tool, also known as virtual (virtual) axis machine tool, is a new type of CNC machining equipment that came out in the mid-1990s and is considered a revolution in the field of machine tools. Since Giddings & Lewis (Giddings & Lewis) and Ingersoll (Ingersoll) of the United States launched parallel machine tools in 1994, universities and research institutes in Germany, Japan, Russia, Switzerland and other countries have successively launched parallel machine tools. There have been many parallel machine tools at home and abroad in the research work of this type of machine tool. The machine tool with this new structure is a great supplement to the traditional machine tool with tandem structure. For example, in the traditional...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B23Q1/48B23Q41/04B25J9/08
CPCB25J17/0266B25J9/0072
Inventor 陈五一韩先国白志富
Owner BEIHANG UNIV