Broach-gage for working deep rectangular openings

FIELD: machine engineering, possibly forming in parts deep rectangular openings by plastic working.

SUBSTANCE: rectangular broach-gage includes hyperbolic working surface and rectangular sharply pointed edge. Such sharply pointed edge forms tooth arranged along perimeter of deep rectangular opening.

EFFECT: improved operational reliability of tool, enhanced quality and accuracy of articles with such openings.

1 dwg

 

The invention relates to the field of engineering, in particular production method of flashing and simultaneous verification of the holes of the small size of the various alloys - method for plastic strain.

Known methods for producing, for example, rectangular holes: drilling, cancerovarian, slotting, broaching, flashing on the respective machines method of cutting metals with the removal of the layer of material, with the formation of different types of chips, ultrasonic flashing. The disadvantage of the process of cutting is the large number of idle strokes, movements of the feed passages, the reciprocating motion, torque, manual labor foremen. Design of special ammunition have many interrelated parts and items. The prototype may have a large number of interrelated parts and working surfaces (prototype - SU 1202817 A, VV 1/04 from 18.06.84, bull. No. 1 from 07.01.86 year).

The objective of the invention is improving the reliability, dimensional accuracy, surface quality.

This is achieved by flashing the caliber to obtain rectangular deep hole is made rectangular and has an active surface, which is made with rectangular hyperbolic and ostrozatochennymi edge, forming the tooth located at Prime the ru holes. Ostrozatochennymi edge made for a single installation with a minimum of errors with a high degree of accuracy for parallelism, perpendicularity, for Squareness.

The working surface is made on the computational points through the actual compression ratio Towithusing the properties of the hyperbola, max height of the tooth firmware-caliber equal to the perimeter of the rectangular openings:

where Kwith- actual compression ratio,

With real coefficient changing conditions of deformation,

x - coordinate of hyperbole

when s=1; x=1; y=Towith;

h=Kc.

Towithreal the estimated coefficient of compression in the working area for a specific pair of workpiece and tool materials, expressed through physical, mechanical and thermophysical properties ([6], p.6-12).

The drawing shows a rectangular, having ostrozatochennymi tooth perimeter flashing caliber to obtain rectangular deep hole by the method of plastic deformation.

Press power PH is applied on the y-axis in the coordinate system firmware-caliber movement Szdown, on one computer, in one operation without removing the layer of material is a plastic deformation of the compression material and formed an exact high-quality hole with a roughness Ra of 0.08...of 0.02 μm Rz of 0.1 μm ON THE T 2789-73, 6-7 quality class.

The original method of obtaining a deep hole by the method of plastic deformation improves the performance, reliability, quality.

Literature

1. Arkusha A.I. Technical mechanics. M.: Higher school. 2003. - S.

2. A.S. No. 476856, M. CL. Ad 23/08, UDC 621.93.036(088.8) 15.07.75, Bulletin No. 26.

3. The Balakshin BS Basics of mechanical engineering. M: mechanical engineering, 1969. - S.

4. Cowan VM Basics of mechanical engineering. M., 1959. V.1; v.2. - P.15-25.

5. Profitable MA Reference. M.: Nauka, 1978. - S.

6. Silin S. the Method of similarity when cutting materials. M: mechanical engineering, 1984. - P.6-26.

7. Saratov VG Hyperbolic function. GOS. Phys.-Mat. literature, Moscow, 1958. - Page 16.

8. Suslov A.G., brown ED and other surface Quality. Handbook, vol. 1. M: mechanical engineering, 1993. - S.

9. Itskovich G.M. Resistance of materials. M., 2000. - S.

Firmware-caliber to get deep rectangular holes made rectangular and having a working surface, wherein the working surface is made with rectangular hyperbolic and ostrozatochennymi edge, forming a tooth located on the perimeter of a deep rectangular hole.



 

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