Processing method of limiting block of anti-countersink drill limiting device
A processing method and technology of limit blocks, which are applied in the field of limit block processing, can solve problems such as high scrap rate, difficult positioning and processing, and long working hours
Active Publication Date: 2014-01-22
SHENYANG AIRCRAFT CORP
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Problems solved by technology
Generally, the limit block in the back countersinking limiter is characterized by straight end faces at both ends, but in order to adapt to the processing of holes with hemispherical arc surface parts, it is necessary to produce hemispherical limit blocks such as figure 2 As shown, due to the complex shape, positioning and processing are relatively difficult. In actual production, the working hours are long and the scrap rate is high.
Method used
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Embodiment Construction
[0021] Such as figure 2 Shown, a kind of processing method of the limit block of countersinking limiter, comprises the following steps:
[0022] 1) Select a round bar of 45# steel, and observe whether the parts have bumps or cracks;
[0023] 2) Tempering treatment:
[0024] 2.1) Heat in a salt bath furnace at a temperature of 830±10°C and hold for 25 minutes;
[0025] 2.2) Then put it into the brine tank for cooling, the water temperature is 20 ~ 40 ℃;
[0026] 2.3) Wash with alkaline water;
[0027] 2.4) Quenching and tempering hardness is HRC28~32: tempering in the furnace first, the tempering temperature is 520°C±10°C, the tempering time is 40min, and then the furnace is air cooled;
[0028] 3) if image 3 As shown, the material is clamped by the three-jaw chuck of the lathe, and the hemispherical arc surface at both ends of the limit block is turned at the same time;
[0029] 4) Turn the outer circle of the limit block to meet the technical requirements;
[0030] 5...
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The invention relates to a processing method of a limiting block of an anti-countersink drill limiting device, which is characterized by comprising the following steps: 1) selecting a 45# round steel rod material, and check the material for bumps or cracks; 2) hardening and tempering; 3) clamping the material with a three-claw chuck of a lathe, and lathing hemispherical arc-shaped surfaces at the two ends of the limiting block; 4) lathing the external circle of the limiting block to meet technical requirements; 5) roughly processing an inner through hole according to drawing requirements; 6) cutting into single limiting blocks according to the broadband size of each limiting block; and 7) correcting the inner through hole with the spherical section as a reference plane, and finely lathing the through hole and an inner stepping hole, thereby completing the processing of the limiting block of the anti-countersink drill limiting device. The anti-countersink drill limiting device processed in the method can comply with technical indicators. Moreover, the processing speed is high, and the production efficiency can be improved.
Description
technical field [0001] The invention relates to a processing method for a limit block of a back countersink stopper, which is used for processing the limit block of a back countersink stopper with a hemispherical arc surface. Background technique [0002] In the aviation field, countersink stoppers are often used to process the holes of aircraft parts. The countersink stoppers can well ensure the size requirements between the processed holes and parts. Therefore, countersink stoppers are widely used in the aviation field. The most common countersink stopper is composed of countersink, lock nut, limit block, screw and guide, such as figure 1 shown. Its working principle is to adjust the depth between the processed hole and the part through the limit block, and then fix the limit block with a lock nut to process the hole. Generally, the limit block in the back countersinking limiter is characterized by straight end faces at both ends, but in order to adapt to the processing...
Claims
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IPC IPC(8): B23P15/00
Inventor 邓楠
Owner SHENYANG AIRCRAFT CORP