Method for processing small nozzle

Abstract

The invention discloses a method for processing a small nozzle, which comprises the following steps of: a, clamping a blank on a numerical control longitudinal cutting lathe; b, roughly and finely turning thread sections and a tool withdrawal groove on a first nozzle section and an external circle with maximum diameter on a second nozzle section and close to the first nozzle section; c, guiding the thread sections with outside diameters of 3 millimeters and lengths of 2 millimeters on the first nozzle section by using a threading tool; d, processing a first guide hole positioned in the first nozzle section by using a drill bit; and e, processing a second guide hole positioned in the second nozzle section. When the inner hole of a third guide hole is processed, the drill bit enters from the right end, and the suspension length is reduced so as to effectively prevent the drill bit from being broken by overlong suspension length; because processing of the inner hole of the third guide hole and an outside chamfer is completed in one-time clamping, a breach caused by oblique clamping is effectively avoided, and the quality is improved; and because clamping flexible claws are manufactured, the clamping joint area is enlarged, the clamping consistency is improved, and the thread quality is ensured.

Description

technical field [0001] The invention relates to a processing method of a nozzle, in particular to a processing method of a small nozzle. Background technique [0002] The method for processing small nozzles in the prior art is as follows: [0003] a. Clamp the blank on the CNC longitudinal cutting lathe; [0004] b. Roughly and finely turning the threaded section on the first nozzle section, the relief groove and the outer circle with the largest diameter adjacent to the first nozzle section on the second nozzle section; [0005] c. Machining the first pilot hole located inside the first nozzle section with a drill bit; [0006] d. Machining the second pilot hole located inside the second nozzle section with a drill bit; [0007] e. cut off; [0008] f. Use the spring collet of the precision instrument lathe to clamp the outer circle with the largest diameter on the second nozzle section that is close to the first nozzle section; [0009] g. Align the outer diameter of ...

AI Technical Summary

Problems solved by technology

[0013] 1. The length of the outer circular surface with the largest diameter adjacent to the first nozzle section on the second nozzle section is short. In order to correct the outer diameter of the threaded section on the first nozzle section, repeated clamping times are frequent and the efficiency is very low.

[0014] 2. When processing the third pilot hole, the drill bit enters from the second pilot hole. Because the drill bit has a long overhang and the drill bit is small, the strength is very low, and the drill bit is easy to break

[0015] 3. Since the end of the third guide hole away from the first nozzle section has an inner hole diameter of 0.35mm and an outer diameter of 0.45mm, the theoretically possible minimum wall thickness of the topmost chamfer is only 0.02mm. If the clamping is not correct, it is easy to Create gaps, thereby rendering the product useless

[0016] 4. Due to the short length of the outer circular surface with the largest diameter on the second nozzle section which is close to the first nozzle section, the clamping force of the spring collet is not enough during thread processing, which may easily cause "slipping" and cause the product to be scrapped

[0017] 5. Due to the short length of the outer circular surface with the largest diameter on the second nozzle section that is close to the first nozzle section, the clamping force of the spring collet is not enough during thread processing, which may easily cause the thread and the workpiece to be out of concentricity

Images