阅读说明：本技术 一种高精度无纺布上切刀的加工工艺 (Processing technology of high-precision non-woven fabric upper cutter ) 是由 朱凌云 李昊宇 张增明 谢敏 陈洋 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种高精度无纺布上切刀的加工工艺,属于分切刀片加工技术领域,包括以下步骤：S101：选料,选取优质冷作模具钢；S102：淬火和回火,将尚未成型的分切上刀放入淬火炉进行淬火,并通过淬火炉缓慢的降温,实现整体回火；S103：平面精磨,使用卧轴圆台平面磨床对淬火后的分切上刀进行平面精打磨；S104：内圆精磨,对分切上刀内圆精打磨；S105：外圆精磨,对分切上刀外圆精打磨；S106：开口,将分切上刀开口至规定角度；S107：清洗,柴油清洗,去飞边毛刺。该工艺制作出来的分切上刀具有良好的精度、强度,适用于多种材料的切割,且表面光洁度与粗糙度良好,寿命较长。(The invention discloses a processing technology of a high-precision non-woven fabric upper cutter, belonging to the technical field of slitting blade processing, and comprising the following steps: s101: selecting materials, namely selecting high-quality cold-work die steel; s102: quenching and tempering, namely putting the unformed upper slitting cutter into a quenching furnace for quenching, and slowly cooling through the quenching furnace to realize integral tempering; s103: performing plane fine grinding, namely performing plane fine grinding on the quenched slitting upper knife by using a horizontal-shaft circular-table plane grinder; s104: finely grinding the inner circle, and finely grinding the inner circle of the upper slitting cutter; s105: finely grinding the excircle, and finely grinding the excircle of the upper slitting cutter; s106: opening, namely opening the upper slitting knife to a specified angle; s107: cleaning, cleaning diesel oil, and removing burrs and fins. The upper cutting tool for cutting manufactured by the process has good precision and strength, is suitable for cutting various materials, and has good surface smoothness and roughness and longer service life.)

1. A processing technology of a high-precision non-woven fabric upper cutter is characterized by comprising the following steps:

s101: selecting materials, namely selecting a plane steel piece of high-quality cold-work die steel, and removing impurities on the surface and inside of the steel to obtain a raw material for slitting and cutting;

s102: quenching and tempering, namely heating the quenching furnace to 1020 +/-5 ℃, then putting the cut upper cutter raw material into the quenching furnace, keeping the temperature for 15 +/-1 minutes, then taking out the raw material, carrying out oil quenching for 2 minutes, taking out the raw material from the furnace, carrying out air cooling, then tempering the raw material at a low temperature of 180 +/-5 ℃ for three times, keeping the temperature for 2-4 hours, and then carrying out air cooling treatment;

s103: performing plane fine grinding, namely selecting a steel piece with the size similar to that of a permanent magnetic chuck, turning the steel piece into 8 uniformly distributed notches through a lathe, downwards recessing for 5-degree bow, putting a blank slitting upper cutter into the notch, fixing the blank upper cutter by using the permanent magnetic chuck, modifying a horizontal-axis circular-table plane grinding machine with the model of MG7340, matching the permanent magnetic chuck, semisynthetic cutting fluid and a resin grinding wheel, and performing plane fine grinding and polishing on the slitting upper cutter to ensure that the surface roughness of a blade is less than Ra0.4;

s104: performing inner circle fine grinding, namely finely grinding the inner hole of the finely ground plane by using an internal grinder to divide the finely ground plane into two parts, and grinding the parts repeatedly to reach the specified required size;

s105: performing outer circle fine grinding, namely, grouping N pieces of roughly molded upper slitting cutters, and performing outer diameter fine grinding on the upper slitting cutters by using a cylindrical grinding machine in cooperation with a tool clamp to reach a specified required size;

s106: opening, namely opening the gear circular knife to a specified angle by using a tapping machine;

s107: cleaning, namely cleaning the blade by using diesel oil, removing burrs and fins of the blade by using oilstone, and enabling the surface of the slitting upper cutter not to contain the fins, thereby integrally finishing processing and obtaining a finished slitting upper cutter.

2. The processing technology of the high-precision non-woven fabric upper cutter according to claim 1, characterized in that the material of the high-quality cold-work die steel in the material selection is any one of Cr12MoV, DC53, SKD11 and LD, and the material of the high-quality cold-work die steel is preferably SKD11 cold-work die steel.

3. The processing technology of the high-precision non-woven fabric upper cutter as claimed in claim 2, wherein the material of the selected high-quality cold-work die steel is SKD11 cold-work die steel.

4. The process for manufacturing a high-precision non-woven fabric upper cutter according to claim 1, wherein the quenching device in the quenching and tempering is an air resistance furnace, and the tempering adopts a three-stage slow tempering method.

5. The process for manufacturing a high-precision non-woven fabric upper cutter according to claim 1, wherein the type of the inner circle finishing medium-sized internal grinding machine is M250A.

6. The process for manufacturing a high-precision non-woven fabric upper cutter according to claim 1, wherein the type of the cylindrical finish grinding machine is MB 1420A.

Technical Field

The invention relates to the technical field of slitting blade processing, in particular to a processing technology of a high-precision non-woven fabric upper cutter.

Background

The slitting blade is made of high-quality cold die steel, and is suitable for industries such as papermaking, paper product processing, adhesive tape products, films, wires and cables, rubber, aluminum foils, chemical fibers, non-manufacturing cloth, composite packaging materials, telecommunication appliances, cigarettes, leather, printing, food and clothing and the like. The blade is required to have the minimum cutting resistance, the maximum abrasion resistance and the sharp and durable cutting edge. In the manufacturing process, the cutting tool sometimes needs to reach micron-scale precision due to the requirement of commodity precision.

However, in the processing process of the upper slitting knife for cutting the non-woven fabric, due to the fact that the precision of the surface grinding machine and the selection of the tool possibly cause that the precision of the upper slitting knife is insufficient, the roughness and the smoothness are poor, the service life is short, in the past, a valve plate grinding machine tool with the model of MYP200 is adopted for carrying out surface fine grinding, and a flat surface reference surface is obtained through grinding.

Disclosure of Invention

The invention aims to provide a processing technology of a high-precision non-woven fabric upper cutter, the upper cutting tool manufactured by the technology has good precision and strength, is suitable for cutting various materials, has good surface smoothness and roughness and longer service life, and solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a processing technology of a high-precision non-woven fabric upper cutter comprises the following steps:

s101: selecting materials, namely selecting a plane steel piece of high-quality cold-work die steel, and removing impurities on the surface and inside of the steel to obtain a raw material for slitting and cutting;

s102: quenching and tempering, namely heating the quenching furnace to 1020 +/-5 ℃, then putting the cut upper cutter raw material into the quenching furnace, keeping the temperature for 15 +/-1 minutes, then taking out the raw material, carrying out oil quenching for 2 minutes, taking out the raw material from the furnace, carrying out air cooling, then tempering the raw material at a low temperature of 180 +/-5 ℃ for three times, keeping the temperature for 2-4 hours, and then carrying out air cooling treatment;

s103: performing plane fine grinding, namely selecting a steel piece with the size similar to that of a permanent magnetic chuck, turning the steel piece into 8 uniformly distributed notches through a lathe, downwards recessing for 5-degree bow, putting a blank slitting upper cutter into the notch, fixing the blank upper cutter by using the permanent magnetic chuck, modifying a horizontal-axis circular-table plane grinding machine with the model of MG7340, matching the permanent magnetic chuck, semisynthetic cutting fluid and a resin grinding wheel, and performing plane fine grinding and polishing on the slitting upper cutter to ensure that the surface roughness of a blade is less than Ra0.4;

s104: performing inner circle fine grinding, namely finely grinding the inner hole of the finely ground plane by using an internal grinder to divide the finely ground plane into two parts, and grinding the parts repeatedly to reach the specified required size;

s105: performing outer circle fine grinding, namely, grouping N pieces of roughly molded upper slitting cutters, and performing outer diameter fine grinding on the upper slitting cutters by using a cylindrical grinding machine in cooperation with a tool clamp to reach a specified required size;

s106: opening, namely opening the gear circular knife to a specified angle by using a tapping machine;

s107: cleaning, namely cleaning the blade by using diesel oil, removing burrs and fins of the blade by using oilstone, and enabling the surface of the slitting upper cutter not to contain the fins, thereby integrally finishing processing and obtaining a finished slitting upper cutter.

Furthermore, the material of the high-quality cold-work die steel in the material selection is any one of Cr12MoV, DC53, SKD11 and LD, and the material of the high-quality cold-work die steel is preferably SKD11 cold-work die steel.

Further, the material of the high-quality cold-work die steel in the material selection is SKD11 cold-work die steel.

Further, the quenching device in the quenching and tempering is an air resistance furnace, and the tempering adopts a three-section slow tempering method.

Further, the model of the internal grinding machine in internal fine grinding is M250A.

Further, the model of the external circular grinder in the external circular fine grinding is MB 1420A.

Compared with the prior art, the invention has the beneficial effects that: the processing technology of the high-precision non-woven fabric upper cutter comprises the steps of modifying an internal tool of a horizontal-axis circular truncated cone surface grinding machine with the model of MG7340, matching the modified internal tool with a resin grinding wheel and a permanent magnetic chuck for use, and using semisynthetic cutting fluid in the grinding process, so that the internal tool has the advantages of emulsion and synthetic cutting fluid, has good precision and wear resistance as a whole, improves the precision, improves the wear resistance, has good cutting performance, and ensures the cutting effect of a slitting blade after being formed; meanwhile, the slicing blade is slowly tempered through a three-section slow tempering process, so that the tempering effect of the whole blade is increased, the generation of integral permanent stress in the blade is reduced, the toughness and the wear resistance of the whole blade are enhanced, and the service life of the blade is ensured; therefore, the slitting blade manufactured by the process has good precision, toughness and strength, is suitable for cutting various materials, and has a long service life, so that the overall practicability is improved.

Drawings

FIG. 1 is an overall view of a high-precision nonwoven fabric upper cutter of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

fig. 3 is a flow chart of a processing process of the high-precision non-woven fabric upper cutter according to the first embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, a processing technology of a high-precision non-woven fabric upper cutter includes the following steps:

s101: selecting high-quality cold-work die steel consistent with the specification of the raw material, removing impurities on the surface and inside of the steel, ensuring that the surface and inside of the steel do not contain excessive impurities, and obtaining a raw material for cutting and cutting the upper cutter, wherein the high-quality cold-work die steel in the material selection of the embodiment is SKD11 cold die steel;

s102: quenching and tempering, namely heating the upper cutting raw material in a quenching furnace to 1020 +/-5 ℃, putting the upper cutting raw material into the quenching furnace for quenching, keeping the temperature for 15 minutes according to the thickness of the upper cutting raw material, taking out the upper cutting raw material for cooling, wherein the quenching cooling mode is oil quenching, taking out the upper cutting raw material after 2 minutes of oil quenching, taking out the upper cutting raw material from the furnace, and then air cooling, wherein the HRC is more than or equal to about 60 ℃, the internal stress is large, the toughness is poor, and the tempering treatment needs to be carried out again; tempering at low temperature of 180 ℃ for three times, keeping the temperature for 3 hours, and then performing air cooling treatment to eliminate internal stress and improve toughness, thereby finishing the whole tempering treatment; putting an unformed slitting upper cutter raw material into a quenching furnace for quenching, and slowly cooling through the quenching furnace to realize integral tempering, wherein the quenching device is an air resistance furnace, and the tempering adopts a three-section slow tempering method; the cutting blade is slowly tempered, so that the overall tempering effect is increased, the generation of the overall permanent stress in the cutting blade is reduced, the overall toughness and wear resistance are enhanced, and the overall service life is ensured;

s103: carrying out plane fine grinding, selecting a steel piece with the size similar to that of a permanent magnetic chuck, turning the steel piece into 8 uniformly distributed notches through a lathe, downwards recessing for 5-degree bow, putting a blank slitting upper knife into the steel piece, fixing the blank upper knife by using the permanent magnetic chuck, realizing the common use of the slitting upper knife and the permanent magnetic chuck by matching the arrangement, modifying a horizontal shaft circular table plane grinding machine with the model of MG7340, matching the permanent magnetic chuck, semisynthetic cutting fluid and a resin grinding wheel, carrying out plane fine grinding and polishing on the slitting upper knife, and enabling the surface roughness of the blade to be less than Ra0.4 so that the blade is in smooth transition and reaches the specified required size; compared with an MYP200 valve plate grinder, the MG7340 horizontal-shaft circular-table surface grinder has the advantages that the precision is improved to a great extent;

s104: performing inner circle fine grinding, namely finely grinding the inner hole of the finely ground upper cutting knife by using an internal grinding machine, and grinding the finely ground upper cutting knife repeatedly to reach the specified required size, wherein the model of the internal grinding machine in the inner circle fine grinding is M250A;

s105: performing outer circle fine grinding, namely, grouping N pieces of roughly molded slitting upper cutters into a group, and matching with a tool clamp to perform outer diameter fine grinding on the slitting upper cutters by using a cylindrical grinding machine to reach the specified required size, wherein the model of the cylindrical grinding machine in the outer circle fine grinding is MB 1420A;

s106: opening, namely opening the gear circular knife to a specified angle by using a tapping machine;

s107: cleaning, namely cleaning the blade by using diesel oil, removing burrs and fins of the blade by using oilstone, and enabling the surface of the slitting upper cutter not to contain the fins, thereby integrally finishing processing and obtaining a finished slitting upper cutter.

Example two

The difference between the embodiment and the first embodiment is that the grinding wheel selected in the planar grinding of the embodiment is not a resin grinding wheel, but a brown corundum grinding wheel; the processing technology of the upper cutter of the high-precision non-woven fabric comprises the following steps:

s101: selecting high-quality cold-work die steel consistent with the specification of the raw material, removing impurities on the surface and inside of the steel, ensuring that the surface and inside of the steel do not contain excessive impurities, and obtaining a raw material for cutting and cutting the upper cutter, wherein the high-quality cold-work die steel in the material selection of the embodiment is SKD11 cold die steel;

s102: quenching and tempering, namely heating the upper cutting raw material in a quenching furnace to 1020 +/-5 ℃, putting the upper cutting raw material into the quenching furnace for quenching, keeping the temperature for 15 minutes according to the thickness of the upper cutting raw material, taking out the upper cutting raw material for cooling, wherein the quenching cooling mode is oil quenching, taking out the upper cutting raw material after 2 minutes of oil quenching, taking out the upper cutting raw material from the furnace, and then air cooling, wherein the HRC is more than or equal to about 60 ℃, the internal stress is large, the toughness is poor, and the tempering treatment needs to be carried out again; tempering at low temperature of 180 ℃ for three times, keeping the temperature for 3 hours, and then performing air cooling treatment to eliminate internal stress and improve toughness, thereby finishing the whole tempering treatment; putting an unformed slitting upper cutter raw material into a quenching furnace for quenching, and slowly cooling through the quenching furnace to realize integral tempering, wherein the quenching device is an air resistance furnace, and the tempering adopts a three-section slow tempering method; the cutting blade is slowly tempered, so that the overall tempering effect is increased, the generation of the overall permanent stress in the cutting blade is reduced, the overall toughness and wear resistance are enhanced, and the overall service life is ensured;

s103: performing planar finish grinding, namely selecting a steel piece with the size similar to that of a permanent magnetic chuck, turning the steel piece into 8 uniformly distributed notches through a lathe, downwards recessing for 5-degree bow, putting a blank slitting upper knife into the notch, fixing the blank upper knife by using the permanent magnetic chuck, realizing the common use of the slitting upper knife and the permanent magnetic chuck by matching the arrangement, modifying a horizontal shaft circular table planar grinding machine with the model of MG7340, matching the permanent magnetic chuck, semisynthetic cutting fluid and a brown corundum grinding wheel, and performing planar finish grinding and polishing on the slitting upper knife to ensure that the surface roughness of the blade is less than Ra0.4;

s104: performing inner circle fine grinding, namely finely grinding the inner hole of the finely ground upper cutting knife by using an internal grinding machine, and grinding the finely ground upper cutting knife repeatedly to reach the specified required size, wherein the model of the internal grinding machine in the inner circle fine grinding is M250A;

s105: performing outer circle fine grinding, namely, grouping N pieces of roughly molded slitting upper cutters into a group, and matching with a tool clamp to perform outer diameter fine grinding on the slitting upper cutters by using a cylindrical grinding machine to reach the specified required size, wherein the model of the cylindrical grinding machine in the outer circle fine grinding is MB 1420A;

s106: opening, namely opening the gear circular knife to a specified angle by using a tapping machine;

s107: cleaning, namely cleaning the blade by using diesel oil, removing burrs and fins of the blade by using oilstone, and enabling the surface of the slitting upper cutter not to contain the fins, thereby integrally finishing processing and obtaining a finished slitting upper cutter.

EXAMPLE III

A processing technology of a high-precision non-woven fabric upper cutter comprises the following steps:

s101: selecting high-quality cold-work die steel consistent with the specification of the raw material, removing impurities on the surface and inside of the steel, ensuring that the surface and inside of the steel do not contain excessive impurities, and obtaining a raw material for cutting and cutting the upper cutter, wherein the high-quality cold-work die steel in the material selection of the embodiment is SKD11 cold die steel;

s102: quenching and tempering, namely heating the upper cutting raw material in a quenching furnace to 1020 +/-5 ℃, putting the upper cutting raw material into the quenching furnace for quenching, keeping the temperature for 15 minutes according to the thickness of the upper cutting raw material, taking out the upper cutting raw material for cooling, wherein the quenching cooling mode is oil quenching, taking out the upper cutting raw material after 2 minutes of oil quenching, taking out the upper cutting raw material from the furnace, and then air cooling, wherein the HRC is more than or equal to about 60 ℃, the internal stress is large, the toughness is poor, and the tempering treatment needs to be carried out again; tempering at low temperature of 180 ℃ for three times, keeping the temperature for 3 hours, and then performing air cooling treatment to eliminate internal stress and improve toughness, thereby finishing the whole tempering treatment; putting an unformed slitting upper cutter raw material into a quenching furnace for quenching, and slowly cooling through the quenching furnace to realize integral tempering, wherein the quenching device is an air resistance furnace, and the tempering adopts a three-section slow tempering method; the cutting blade is slowly tempered, so that the overall tempering effect is increased, the generation of the overall permanent stress in the cutting blade is reduced, the overall toughness and wear resistance are enhanced, and the overall service life is ensured;

s103: performing plane fine grinding, namely performing plane fine grinding and polishing on the slitting upper cutter by using a MYP200 valve plate mill, and combining with synthetic cutting fluid and a resin grinding wheel to enable the blades to be in smooth transition and reach the specified required size;

s104: performing inner circle fine grinding, namely finely grinding the inner hole of the finely ground upper cutting knife by using an internal grinding machine, and grinding the finely ground upper cutting knife repeatedly to reach the specified required size, wherein the model of the internal grinding machine in the inner circle fine grinding is M250A;

s105: performing outer circle fine grinding, namely, grouping N pieces of roughly molded slitting upper cutters into a group, and matching with a tool clamp to perform outer diameter fine grinding on the slitting upper cutters by using a cylindrical grinding machine to reach the specified required size, wherein the model of the cylindrical grinding machine in the outer circle fine grinding is MB 1420A;

s106: opening, namely opening the gear circular knife to a specified angle by using a tapping machine;

s107: cleaning, namely cleaning the blade by using diesel oil, removing burrs and fins of the blade by using oilstone, and enabling the surface of the slitting upper cutter not to contain the fins, thereby integrally finishing processing and obtaining a finished slitting upper cutter.

The high-precision nonwoven upper cutter processed in the above example was tested to obtain the following test data, as shown in table 1:

TABLE 1 high-precision data for detecting the cutting knife on the non-woven fabric

According to the statistical data, the internal permanent stress of the slitting upper knife obtained in the first embodiment is small, the precision is high, the strength is high, the tolerance can reach the range of +/-0.02, the surface roughness is less than or equal to 0.4, the flatness is less than or equal to 0.02, the blade is excessively smooth, and the appearance is attractive; the internal permanent stress of the upper slitting knife obtained in the second embodiment is small, the precision is high, the strength is high, the tolerance can reach +/-0.02, the surface roughness is less than or equal to 1.6, the planeness is less than or equal to 0.03, the blade is excessively smooth, and the appearance is attractive; the slitting upper knife obtained in the third embodiment has small internal permanent stress, general precision and strong strength, the tolerance can reach +/-0.02, the surface roughness is less than or equal to 3.2, the planeness is less than or equal to 0.04, the transition part of the blade is unsmooth and rough, and the appearance is poor.

Compared with the traditional slitting blade machining process, the invention increases the integral precision and flatness by using the cold-work die steel made of SKD11 material, and meanwhile, the invention uses the internal tool modified by the horizontal-axis circular truncated cone surface grinding machine with the model of MG7340, semisynthetic cutting fluid and resin grinding wheels, so that the integral slitting blade has good precision and wear resistance, the integral strength of the slitting blade is increased, and the service life of the slitting blade manufactured by the process is more suitable for the requirements of the current society.

In summary, the following steps: the processing technology of the high-precision non-woven fabric upper cutter comprises the steps of modifying an internal tool of a horizontal-axis circular truncated cone surface grinding machine with the model of MG7340, matching the modified internal tool with a resin grinding wheel and a permanent magnetic chuck for use, and using semisynthetic cutting fluid in the grinding process, so that the internal tool has the advantages of emulsion and synthetic cutting fluid, has good precision and wear resistance as a whole, improves the precision, improves the wear resistance, has good cutting performance, and ensures the cutting effect of a slitting blade after being formed; meanwhile, the slicing blade is slowly tempered through a three-section slow tempering process, so that the tempering effect of the whole blade is increased, the generation of integral permanent stress in the blade is reduced, the toughness and the wear resistance of the whole blade are enhanced, and the service life of the blade is ensured; therefore, the slitting blade manufactured by the process has good precision, toughness and strength, is suitable for cutting various materials, and has a long service life, so that the overall practicability is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.