Positioning processing jig with two pins on one side and positioning method using the same
A technology of pin positioning and one positioning, which is applied in the field of two-pin positioning processing fixtures on one side, can solve the problems of frequent interchange of two pins and lower accuracy of positioning pin installation positions, and achieve the effect of saving processing time and ensuring accuracy
Inactive Publication Date: 2017-10-31
ZHEJIANG GEELY POWERTRAIN CO LTD
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Problems solved by technology
The left-right symmetrical and role-reversible positioning pin effectively solves the problem of frequent interchange of two pins in collinear production, greatly improves the production efficiency of collinear production, and avoids the installation position of positioning pins caused by frequent interchange of two pins The problem of reduced accuracy
Method used
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Embodiment Construction
[0025] Below by specific embodiment, in conjunction with accompanying drawing, the technical solution of the present invention is described in further detail:
[0026] see figure 1 , a fixture with two pins on one side for positioning and processing, including a fixture body 1, two positioning pins 2 arranged on the positioning plane of the fixture body 1 and extending upward, and a pushing mechanism 3 and a clamping mechanism 4 arranged on the side of the fixture body 1 .
[0027] The positioning pins 2 are correspondingly arranged according to the positions of the positioning holes of the workpiece 5 to be processed, and the pushing mechanism 3 is positioned at both ends of the connecting line of the two positioning pins 2 . The clamping mechanism 4 is arranged on the periphery of the fixture body 1 according to the structure of the workpiece 5 .
[0028] see figure 2 , In this embodiment, the side of the positioning pin 2 is provided with a main chamfer 21 and two secon...
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The invention discloses a one-surface and two-pin positioning processing fixture and a positioning method using the processing fixture. The processing fixture comprises a fixture body with a positioning plane, and two dowel pins arranged on the positioning plane of the fixture body in a spaced manner; main cutting edges are arranged on one sides of the dowel pins; central angles of the main cutting edges are 90-180 degrees; the two dowel pins are arranged with opposite main cutting edges on the positioning plane; the dowel pins and workpiece positioning holes are in clearance fit; the interval dimensional tolerance of the two dowel pins is smaller than the interval dimensional tolerance of the workpiece positioning holes; and pushing mechanisms are respectively arranged at two ends of the connecting direction of the two dowel pins on the fixture body. The positioning method comprises the following steps that workpieces are arranged on the dowel pins of the processing fixture through the positioning holes in the workpieces, and are pushed and pressed by the pushing mechanisms on one sides of zero-reference positioning holes. Through fit between the pushing mechanisms, the dowel pins change roles between cylinder pins and prismatic pins, so that the problems of frequent two-pin interchange, reduction of production efficiency and reduction of mounting position precision of the dowel pins are solved.
Description
technical field [0001] The invention relates to a machining fixture, in particular to a positioning machining fixture with two pins on one side. Background technique [0002] Nowadays, with the increasing speed of product replacement, multi-variety and small-batch production has become the mainstream of engine parts production. In order to adapt to this change, today's product processing lines are required to realize multi-variety collinear production. In the traditional sense, two-pin positioning on one side uses cylindrical pins and rhombic pins to limit the six degrees of freedom of the workpiece for positioning processing, while the positioning zero reference point of the left and right cylinder head workpieces is symmetrical. On the fixture The installation positions of the cylindrical pin and the diamond pin are opposite. At present, the common solution to solve the problem of collinear processing of the left and right cylinder heads is to replace the positions of the ...
Claims
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IPC IPC(8): B23Q3/06
CPCB23Q3/06
Inventor 童向荣陈政弘王瑞平
Owner ZHEJIANG GEELY POWERTRAIN CO LTD