CN1504284A

CN1504284A - Preparation method of cutter for meat machinery

Info

Publication number: CN1504284A
Application number: CNA021533830A
Authority: CN
Inventors: 刘同�; 刘同炘
Original assignee: Beijing North Hope Science & Technology Development Co Ltd
Current assignee: Beijing North Hope Science & Technology Development Co Ltd
Priority date: 2002-11-29
Filing date: 2002-11-29
Publication date: 2004-06-16
Anticipated expiration: 2022-11-29
Also published as: CN1253270C

Abstract

The invention discloses a process of manufacturing knife tool for meat processing machinery, which comprises the steps of knife tool blank formula design, bloom forging conversion rolling and thermal treatment, wherein the knife tool blank components are C, Si, Mn, Cr, Mo, V, S, P, Fe, the ratio of forging reduction is 3.0, the heat treatment hardening temperature is 1040-1080 deg. C, the tempering temperature is 460-520 deg. C. The advantages of the meat machinery knife tool by the invention are fine metallurgical structure, better abrasion-resistance, longer service life and low cost of production.

Description

The meat machinery manufacture method of cutter

Affiliated field

The present invention relates to the food processing machinery cutting-tool engineering, particularly the meat machinery manufacture method of cutter.

Background technology

Meat machinery is different from metal cutting tool with cutter, not only enough hardness will be arranged, and very high wearability will be arranged, non-corrosive, thereby requirement must be stainless tool steel.At present, cutter such as cutmixer cutter that domestic meat machinery uses, main dependence on import, import price is relatively more expensive, and its price is about 6～10 times of homemade cutter.Homemade meat machinery is only carbon martensitic stainless steel among the 4Crl3 of 0.4%. of phosphorus content with cutter.This steel is that structural steel is not a tool steel, though low price, service life is on the low side, is equivalent to 1/5～1/6 of import cutter approximately.Directly restrict production efficiency the service life of cutter, as the cutmixer cutter is with 3～6 every group, be loaded on the cutmixer main shaft knife bar, 4000～7000 rev/mins of its turn ups, during each clamping cutter, need carry out quiet, dynamically balanced verification, often low because of cutter life, need grinding or number of changing knife many, and have a strong impact on the production efficiency of cutmixer.

Summary of the invention

The present invention is directed to meat machinery with the existing problem of cutter, propose a kind of new meat machinery and use the cutter manufacture method, the meat machinery that adopts this method to make is used cutter, and not only production cost is low, and low price can be based on our country, and long service life.

Therefore the present invention has proposed a kind of meat machinery and has used cutter manufacture method, this method to comprise the design of cutter blank formulation, and steel billet changes to be forged rolling and heat treatment.

(a) cutter blank component prescription.This prescription is the stainless tool steel of high alum Crl3 type, and composition proportion sees the following form:

?C	???Si	?Mn	??Cr	?Mo
?C	???Si	?Mn	??Cr	?Mo	?0.75～0.85	???0.20～0.35	?0.40～0.60	??13.0～14.0	?0.50～0.60
?V	???S	?P	???Fe		?0.75～0.85	???0.20～0.35	?0.40～0.60	??13.0～14.0	?0.50～0.60
?V	???S	?P	???Fe		?1.70～1.90	???＜0.02	＜0.03	Surplus

(b), steel billet changes forging rolling system.Above-mentioned steel billet is changed forging rolling system, and make its ratio of forging reduction reach 3.0, reroll and make sheet material or be swaged into forging.

(c), heat treatment.Above-mentioned sheet material or forging through changing forging heat-treated, and hardening heat is 1040～1080C, and temperature is 460～520 ℃.

Cutter made in accordance with the present invention, its matrix is a martensitic stain less steel, and chromium content belongs to the Crl3 type, and chrome content is lower, thereby lower than the price of high chromium tool steel such as Cr18 type.Carbon content is not very high about 0.8%, but can satisfy the requirement of meat machinery with cutter hardness (reaching more than the HRC56).Add higher alum, can make a large amount of carbonization alum of disperse on the martensitic structure, thereby improve its wearability.

Improving the meat machinery key of cutter life, is the spread that improves carbide in the cutter material.The present invention makes the solid solution to greatest extent of free carbide by the cutter raw material are changed forging with the fragmenting bulk carbide by heat treatment, and reaches thin, little, even, round.

The cutter that adopts the present invention to make, its life-span and German import cutter are on close level, but its price only is 1/3 of import cutter.With 200 liters of cutmixer cutters is example, 6 on every group of blade, and directly from external import, every agreement that contracts a film or TV play to an actor or actress needs 1200 yuan of RMB, 7200 yuan every group.And the cutter made from the inventive method, its service life is suitable with the import cutter, and every of price 300 yuan of need RMB only, 1800 yuan every group.With a large-scale meat processing combine is example, and annual the need can be saved 5,400,000 yuans of funds every year, and can save a large amount of foreign exchanges for national with 1000 cover chopping knifes.Aforementioned calculation is not considered the income of enhancing productivity and being brought.

Description of drawings

Fig. 1 is a metallographic structure micrograph of the present invention

The specific embodiment

The invention will be further described below in conjunction with embodiment and accompanying drawing:

Example 1: cutter thickness 5mm

(1) cutter blank composition (%):

????C	????Mo	????Cr	????V	????Si	????Mn
????C	????Mo	????Cr	????V	????Si	????Mn	????0.78	????0.55	????13.5	????1.70	????0.20	????0.40
????S	????P	????Fe				????0.78	????0.55	????13.5	????1.70	????0.20	????0.40
????S	????P	????Fe				??＜0.02	??＜0.03	Surplus

(2) process conditions: steel billet changes forging rolling system, makes ratio of forging reduction reach 3.0; Quench and heat, salt bath furnace, oil cooling, hardening heat: 1040～1080 ℃, temperature: 460～500 ℃;

(3) result: hardness HRC56～57, metallographic structure such as figure one, high abrasion resistance.

Example 2: cutter thickness 4mm

(1) cutter blank composition (%):

??C	??Mo	??Cr	??V	??Si	??Mn
??C	??Mo	??Cr	??V	??Si	??Mn	??0.79	??0.55	??14.0	??1.75	??0.26	??0.42
??S	??P	??Fe				??0.79	??0.55	??14.0	??1.75	??0.26	??0.42
??S	??P	??Fe				??＜0.02	??＜0.03	Surplus

(2) process conditions: steel billet changes forging rolling system, makes ratio of forging reduction reach 3.0; Quench and heat, special atmosphere oven, oil cooling, hardening heat: 1040～1080 ℃, temperature: 460～500 ℃;

Example 3: cutter thickness 3mm

(1) cutter blank composition (%):

????C	????Mo	????Cr	????V	????Si	????Mn
????C	????Mo	????Cr	????V	????Si	????Mn	????0.81	????0.55	????14.0	????1.85	????0.34	????0.45
????S	????P	????Fe				????0.81	????0.55	????14.0	????1.85	????0.34	????0.45
????S	????P	????Fe				????＜0.02	????＜0.03	Surplus

(2) process conditions: steel billet changes forging rolling system, makes ratio of forging reduction reach 3.0; Heating in vacuum, the nitrogen cooling, hardening heat: 1040～1080 ℃, temperature: 460～500 ℃;

(3) result: hardness HRC58, metallographic structure such as figure one, wearability is good.

Claims

1, a kind of meat machinery manufacture method of cutter comprises that the design of cutter blank formulation, steel billet change forging rolling system and heat treatment, is characterized in that:

(a) the cutter blank formulation is:

C：0.75～0.85，Si：0.20～0.35，Mn：0.40～0.60，Cr：13.0～14.0，Mo：

0.50～0.60, V:1.70～1.90, S:＜0.02, P:＜0.03, Fe: surplus;

(b) steel billet changes that to forge ratio of forging reduction be 3.0;

(c) the heat-treatment quenching temperature is 1040～1080C, and temperature is 460～520 ℃.