Compound tool for processing spot-faced holes in piano string hitting machine and installation method of compound tool
A composite tool and action machine technology, which is applied to tools used in lathes, manufacturing tools, metal processing equipment, etc., can solve the problems of poor clamping effect, low efficiency, complicated steps, etc., and achieves good clamping effect. Simple structure and convenient installation
Inactive Publication Date: 2012-10-17
PEARL RIVER PIANO GROUP
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AI Technical Summary
Problems solved by technology
The compound tool with this locking structure has the following disadvantages: the clamping effect is not good, and it cannot be used for clamping small needle knives with a diameter of less than 1.5 mm
When the small needle knife cannot be clamped, it can only be processed in steps. First use the knife handle to process the annular concave hole and the circular step, and then use the needle knife to process the small through hole. The steps are cumbersome and inefficient.
Method used
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[0029] The present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.
[0030] Figure 3 to Figure 6 As shown, the compound tool used for processing fisheye holes in the action includes a knife handle 1, a needle knife 2 and a locking positioning nail 3.
[0031] The knife handle 1 includes a knife head 11 and a knife body 12 . The cutter head 11 is a triangular prism, and one side of the triangular prism joins the cylindrical cutter body 12, and the side edge just to the side is the edge of a knife for cutting, that is, the head of the knife handle 1. The two sides of the knife edge protrude for processing annular concave holes, and the middle of the knife edge is concave for processing circular steps. The knife handle 1 is provided with a cavity for placing the needle knife 2, the cavity axially runs through the knife handle 1, and the shape of the cavity near the head of the knife handle corresponds to the...
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The invention relates to a compound tool for processing spot-faced holes in a piano string hitting machine, comprising a tool holder and a needle knife, wherein the needle knife axially penetrates into the tool holder; the head part of the needle knife penetrates out from the head part of the tool holder; the compound tool further comprises a locking positioning pin; a positioning groove of which the depth extends along the axial direction is arranged on one end of the locking positioning pin; the tail part of the needle knife is arranged into the positioning groove and supports to open the positioning groove; the locking positioning pin screws into the tail part of the tool holder to connect the tail part of the tool holder in a threaded manner. The invention also relates to an installation method of the compound tool for processing spot-faced holes in a piano string hitting machine. The compound tool has the advantages of simple structure, convenient installation and good holding effect, is suitable for holding the tiny needle knife and belongs to the field of compound tool for processing piano.
Description
technical field [0001] The invention relates to a composite cutter for piano processing, in particular to a composite cutter for processing fish-eye holes in an action and an installation method thereof. Background technique [0002] In the action of the piano, some parts need to be machined with fish eye holes for the installation of moving parts. like figure 1 and figure 2 As shown, the shape of the fisheye hole is: there is a raised circular step in the middle of the annular concave hole, and there is a small through hole in the middle of the circular step. There are single-sided and double-sided fisheye holes, figure 1 and figure 2 The fisheye holes shown are double-sided. [0003] The circular recess and circular step are machined from the handle. The handle includes a cutter head and a cylindrical cutter body located at the tail of the cutter head. The cutter head is triangular prism-shaped. One side of the triangular prism is connected to the cylindrical botto...
Claims
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IPC IPC(8): B23B27/16
Inventor 梁志和梁国华何玉坚
Owner PEARL RIVER PIANO GROUP