CN111412372A

CN111412372A - Shell case lengthening water-free cleaning processing technology

Info

Publication number: CN111412372A
Application number: CN202010330608.6A
Authority: CN
Inventors: 黄猛; 段秀超; 姚源
Original assignee: Shandong Junwo Technology Co ltd
Current assignee: Shandong Junwo Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-14

Abstract

The invention provides a cartridge case lengthening waterless cleaning processing technology, which comprises the following steps: the process is characterized in that soap water cooling liquid is replaced, powder rolling treatment is carried out on the cartridge case pot and the extension product, polytetrafluoroethylene-based stretching lubricating films 5 and 6 are formed on the processed surfaces, five surface cleaning procedures are omitted, no water is used, and all extension processing can be completed only by carrying out powder rolling treatment twice. The product after the lengthening has qualified appearance and size, saves a large amount of water and water treatment cost, and is beneficial to environmental protection.

Description

Shell case lengthening water-free cleaning processing technology

Technical Field

The invention relates to a cartridge case lengthening processing technology, in particular to a processing technology of a waterless cleaning product after a cartridge case is lengthened.

Background

In the field of cartridge case processing, a plurality of lengthening processes before cartridge case forming need to carry out surface cleaning and then reprocessing, surface cleaning processes comprise acid cleaning, alkali cleaning, rinsing, saponification, drying and the like, and a large amount of water is consumed and sewage is treated subsequently. At present, the national environmental protection dynamics is strengthened, and is stricter to sewage treatment's requirement, has increased the sewage treatment degree of difficulty of surface cleaning process. Secondly, the washed product has the defects of easy surface oxidation and unstable surface quality, and has the defects of slag falling, pulling and the like in the lengthening processing process, and the surface needs to be cleaned after each lengthening process, so the production process is complicated, the production cost is high, and the environmental protection pressure is high. The prior lengthening processing process flow before shell forming is as follows: blanking, punching a spittoon → annealing a spittoon → surface cleaning (rinsing, acid washing, rinsing, alkali washing, rinsing, saponification and drying) → first drawing annealing → surface cleaning → second drawing → surface cleaning → third drawing → surface cleaning → fourth drawing → surface cleaning → incision, and all the coolant in the above drawing process is soapy water.

Disclosure of Invention

In order to solve the defects, the invention provides a water-free cleaning processing technology for lengthening a cartridge case, and solves the problems of multiple and complicated surface cleaning procedures, multiple processing defects and high environmental protection pressure in the processing process of the cartridge case.

In order to achieve the purpose, the processing technology adopted by the invention is as follows:

and replacing soap water cooling liquid in all elongation procedures, and using a surfactant lauryl sodium sulfate aqueous solution which is not easy to stick.

All annealing processes adopt a continuous oxygen-free bright annealing mode.

And (3) the surface of the product is subjected to lengthening lubrication by adopting a method of adhering a solid lubricant.

The solid lubricant is adhered to the product after the product is heated to a certain temperature, so that certain processing stress can be eliminated, and the solid lubricant can be more uniformly adhered to the inner surface and the outer surface of the product.

After the product adhered with the solid lubricant is elongated, a layer of uniform and compact tensile lubricating film is formed on the inner surface and the outer surface and is not easy to fall off.

The product with the tensile lubricating film can not fall off without annealing process, can play a good lubricating role in the subsequent elongation process, and does not need to be adhered with a solid lubricant.

Preferably, the solid lubricant is low molecular weight polytetrafluoroethylene micro powder, and the particle size is less than or equal to 80 mu m.

Preferably, various aqueous solutions are not needed to be used for cleaning the surface of the product before each lengthening process, no water is used, no water treatment cost is needed, and the method is beneficial to environmental protection.

The invention has the beneficial effects that: according to the invention, the polytetrafluoroethylene-based stretched lubricating film is formed on the surface of the product, all elongation processes can be completed only by two times of powder rolling treatment, the product after elongation is qualified in appearance and size, a large amount of water and water treatment cost are saved, and the environment protection is facilitated.

Drawings

Fig. 1 is a schematic view of the working principle of the powder rolling machine.

FIG. 2 is a schematic view of the tensile lubricating film formed on the inner and outer surfaces of the inventive article.

Wherein: 1: an electrical heating zone; 2: a spiral powder rolling area; 3: a powder screening area; 4: a turnover box; 5: the inner surface is stretched with a lubricating film; 6: the outer surface is stretched with a lubricating film.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and more obvious, the present invention will now be described in further detail.

All process coolants used aqueous sodium lauryl sulfate.

Blanking and cupping: the spittoon is blanked and punched by a double-action punch and a composite die.

And (4) carrying out spittoon annealing: adopting a bright continuous annealing furnace to anneal the spittoon without oxygen, and the hardness is HV₅100～140。

Rolling the powder on the spittoon: the spittoon continuously enters a powder rolling machine, the front electric heating area 1 is heated, the heating temperature is 300-400 ℃, the spittoon is heated for 5-10 minutes and then enters a spiral powder rolling area 2, the solid lubricant is uniformly adhered to the surface of the spittoon and then enters a powder screening area 3 through the transmission of a spiral mechanism, and the spittoon rotates in a tapered barrel-shaped inner cavity to shake off redundant powder and then rolls out, and then falls into a turnover box 4.

Primary lengthening: and (5) carrying out primary elongation on the spittoon rolled with the powder on an elongation machine.

First annealing: performing anaerobic annealing on the product subjected to primary elongation by adopting a bright continuous annealing furnace, wherein the hardness is HV₅100～140。

Firstly, rolling powder: and rolling the product subjected to primary elongation annealing by using a powder rolling machine.

Secondary elongation: and (3) carrying out secondary elongation on the primary elongated product subjected to powder rolling by using a secondary elongation machine, wherein a layer of uniform and compact tensile lubricating films 5 and 6 can be formed on the inner surface and the outer surface of the product at the moment, and the product has a good lubricating effect in the subsequent elongation process.

And (3) three times of elongation: and (4) performing three-time elongation on the product subjected to the secondary elongation by adopting a three-elongation machine.

Four elongation: and (4) carrying out four-time elongation on the product subjected to three-time elongation by adopting a four-elongation machine.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A waterless cleaning processing technology for extending cartridge cases is characterized in that: compact solid lubricant stretching lubricating films are adhered to the surfaces of the cartridge case and the extension products, and the surfaces of the products do not need to be cleaned by aqueous solution between the extension processes.

2. The waterless cleaning process for elongating a cartridge case of claim 1 further comprising: the solid lubricant is low molecular weight polytetrafluoroethylene micro powder, and the particle size is less than or equal to 80 mu m.