Method for processing large-diameter segmental-arc feature by adopting small working table
A technology with a small worktable and a large diameter, which is applied in the field of mechanical arc processing, can solve problems such as rising product manufacturing costs, mismatching of machine tool equipment, and small arc lengths, etc., and achieves strong scalability, improved machine tool utilization, and The effect of high processing quality and efficiency
Inactive Publication Date: 2015-01-07
DONGFANG TURBINE CO LTD
View PDF3 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] With the continuous update of the steam seal device of the steam turbine unit, there is a special seal ring, which has a special structure. On the basis of the conventional seal ring, the helical tooth structure elements on the circumference of the inner hole body near the end face are added. The number of helical teeth is large, the features are evenly distributed along the center of rotation, the processing volume is large, and the diameter of the seal ring is relatively large, but the length and size of each arc section is relatively small. The existing processing schemes all need to use a rotary shaft larger than the diameter of the part. The workbench performs indexing processing through the rotation center of the workbench, which causes the mismatch of machine tool equipment for parts processing, which directly leads to a substantial increase in product manufacturing costs
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
[0024] Such as figure 1 , figure 2 with image 3 As shown, the arc section part 2 is placed on the upper part of the positioning fixture 1 on the small workbench 5, and the two ends are fixed with the positioning pins 4, and the arc section positioning surface 3 faces the center of rotation O of the workbench. Pay attention to place the arc segment part 2 on the symmetrical center of the fixture 1, so that the table rotation center O, the arc segment center point A of the processing surface, and the arc segment rotation center O' are connected in a straight line, that is, OAO' is on a straight line, and The straight line is parallel to the Z axis; measure the dimensions D and R, and then use the mathematically calculated positions of each processing point after the rotary table 5 rotates to establish a floating coordinate system. The coordinate position calculation formula is: ΔX=(R+D)*SINα ;ΔZ=-(R+D)*(1-COSα), where: ΔX is the offset distance of the processing point in 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 invention discloses a method for processing large-diameter segmental-arc feature by adopting a small working table. The method comprises the steps of initializing, building a workpiece coordinate system, building a floating coordinate system, establishing the transformational relation of two coordinate systems, entering the floating coordinate system to call a tooth groove processing subroutine, leaving the floating coordinate system to judge weather all tooth grooves are processed completely, if not, repeating the indexing until the tooth grooves are processed completely. According to the method, machine tool resources can be reasonably distributed, the utilization rate of the machine tool is improved, the processing quality and the processing efficiency are high, the promotion property is strong, and the processing requirements of the product can be well met.
Description
technical field [0001] The invention relates to mechanical arc machining, in particular to a method for machining large-diameter arc-segment features with a small workbench. Background technique [0002] With the continuous update of the steam seal device of the steam turbine unit, there is a special seal ring, which has a special structure. On the basis of the conventional seal ring, the helical tooth structure elements on the circumference of the inner hole body near the end face are added. The number of helical teeth is large, the features are evenly distributed along the center of rotation, the processing volume is large, and the diameter of the seal ring is relatively large, but the length and size of each arc section is relatively small. The existing processing schemes all need to use a rotary shaft larger than the diameter of the part. The workbench performs indexing processing through the rotation center of the workbench, which causes a mismatch in the selection of m...
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 Applications(China)
IPC IPC(8): B23C3/34
CPCB23C3/34
Inventor 周万煜彭熙熙刘家顺朱永祥谢敏李松林谭云曾强罗飞侠崔志国刘艳平
Owner DONGFANG TURBINE CO LTD