Manufacturing process of laser cladding paper cutter

Abstract

The invention belongs to the technical field of laser cladding, and particularly relates to a laser cladding paper cutter manufacturing process which comprises the following steps: 1, preparing a cutter body; a cutter body meeting the quality requirement is produced for standby application through the machining procedures of cutter body base material selection, surface treatment, base material straightening, laser cutting, size measurement, milling and grooving, drilling and tapping, reserved hole forming, grinding and polishing, base material cleaning and quality inspection. And 2, preparing the cutting edge, wherein the cutting edge meeting the quality requirement is produced for standby application through the machining procedures of cutting edge base material selection, surface treatment, base material straightening, laser cutting, size measurement, preformed hole forming, milling and edging, grinding and polishing, base material cleaning, quenching and tempering, quality inspection and cutting edge sharpness testing. According to the paper cutter, materials of the cutter body and the cutting edge are selected respectively, so that the production cost of the paper cutter is reduced; the strength of the blade blank is improved through quenching and tempering, and then the strength of the paper cutter is further improved through alloy powder cladding, so that the service life of the paper cutter is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser cladding, and particularly relates to a laser cladding paper cutter manufacturing process. BACKGROUND

[0002] The paper cutter is a special tool for cutting paper, photos, art paper and cold and hot mounting paper, and the paper cutter is processed through blade coating and 20° blade angle optimization to maintain high sharpness, and the cut product edge is neat without burrs. Some high-end models are equipped with air cushion work platforms to reduce friction resistance and improve cutting accuracy.

[0003] After the paper cutter is accurately installed on the flat operation surface of the paper cutting machine, it undertakes the key task of efficiently cutting the neatly stacked paper after printing. However, during the continuous high-intensity and long-time cutting operation, the sharpness of the blade will gradually decrease due to repeated friction with the paper fibers, and the dulling phenomenon is inevitable. Once the blade is dull, clean and neat cutting cannot be achieved during subsequent paper cutting, which leads to burrs on the edge of the cut paper, seriously affecting the overall effect of paper cutting and the quality of the finished product.

[0004] In the face of the performance limitations of the paper cutter in the current use process, the paper cutter manufacturing industry urgently needs to develop and apply an innovative technology and process that can significantly improve the overall performance of the cutter, greatly extend its service life, effectively reduce production costs, and thus drive the entire industry to complete technological innovation and sustainable transformation. SUMMARY

[0005] The purpose of the present application is to provide a laser cladding paper cutter manufacturing process, which aims to solve the problem that long-time cutting operation will cause the blade to become dull, resulting in burrs on the edge of the cut paper and affecting the cutting effect.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a laser cladding paper cutter manufacturing process, comprising the following steps: First step: cutter body preparation, through cutter body base material selection, surface treatment, base material straightening, laser cutting, size measurement, milling slot, drilling and tapping, thread post welding, polishing, base material cleaning and quality inspection processing procedures to produce cutter bodies that meet the quality requirements for standby; Second step: blade preparation, through blade base material selection, surface treatment, base material straightening, laser cutting, size measurement, reserved hole opening, blade milling, polishing, base material cleaning, quenching and tempering, quality inspection and blade edge sharpness testing processing procedures to produce blades that meet the quality requirements for standby; Third step: cladding, fixing the blade treated in the second step on the laser cladding machine, adding alloy powder for cladding to the surface of the blade, starting the laser cladding machine to cladding the alloy powder for cladding on the surface of the blade to the surface of the blade, thereby forming a secondary blade; Fourth step: stress relief annealing, placing the cladded secondary blade in the third step into a car bottom resistance furnace, heating to 650-700 DEG C, holding and then slowly cooling for stress relief annealing, thereby forming a tertiary blade; Fifth step: straightening and leveling, straightening and leveling the stress relief annealed tertiary blade in the fourth step, and the front surface flatness of the tertiary blade is not greater than 0.08 mm through the leveling machine; Sixth step: grinding and polishing, rough grinding and fine grinding the surface of the straightened and leveled tertiary blade in the fifth step in sequence through the grinding machine, and polishing the surface of the tertiary blade through the polishing machine; Seventh step: edge grinding, removing the small burrs on the surface of the ground and polished tertiary blade in the sixth step through the edge grinding machine; Eighth step: surface cleaning, putting the tertiary blade in the seventh step into the soaking type alkali washing tank, configuring sodium hydroxide cleaning solution, heating to 60-80 DEG C, soaking the fourth cutting knife for 10-15 minutes, then washing with a high-pressure water gun, and finally drying; Ninth step: performance detection, detecting the size, roughness, blade hardness and appearance of the cleaned tertiary blade in the eighth step, thereby selecting out the unqualified tertiary blade and recycling; Tenth step: blade edge sharpness test, testing the qualified tertiary blade in the ninth step through the digital cutting force tester, the cutting speed is set to 150-250 mm / min, the standard paper tape or silicone film with a thickness of 0.2-0.4 mm is used as the test medium, and the peak cutting force ≤50 gf is the qualified ultimate cutting knife; Eleventh step: assembling the blade and the blade body, assembling the blade and the blade body by sleeving the reserved hole of the blade on the surface of the threaded column of the blade body, and then screwing the threaded connection of the matched nut and the threaded column, thereby assembling the blade and the blade body; Twelfth step: packaging and warehousing, packaging the ultimate cutting knife in the eleventh step through the packaging machine and storing in the warehouse.

[0007] As preferred in the laser cladding cutting knife manufacturing process, the blade body substrate is selected from carbon alloy steel plate in the first step, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness through the milling machine, polishing the surface of the carbon alloy steel plate through the polishing device, and cleaning the surface of the carbon alloy steel plate through the high-pressure water gun.

[0008] As a kind of laser cladding paper cutter manufacturing process of the application preferably, in the first step, the substrate straightening, by leveling machine to the surface treated carbon alloy steel plate is straightened and leveled, straightening and leveling the back surface flatness of blade body is not more than 0.06mm; Laser cutting, by laser cutting machine tool to the substrate straightened carbon alloy steel plate is cut, and the size of the blade body blank is cut out; Size measurement, by optical measuring device to the blade body blank after cutting is measured, the error between measured value and standard value is not more than 0.15mm.

[0009] As a kind of laser cladding paper cutter manufacturing process of the application preferably, in the first step, the milling slot, by milling machine milling suitable for embedding blade embedding slot on the surface of the blade body; Drilling and tapping, by tapping machine to drill 10 × M20mm threaded hole on the surface of the blade body, the depth is 50mm; Reserved hole setting, by drilling mechanism to set up reserved hole for fixing in the embedding slot of the blade body.

[0010] As a kind of laser cladding paper cutter manufacturing process of the application preferably, in the first step, the grinding and polishing, the surface of the embedding slot on the surface of the blade body is polished, and the opening of the threaded hole on the surface of the blade body is polished and deburred; Substrate cleaning, the blade body after polishing is put into soaking type alkali washing tank, sodium hydroxide cleaning solution is configured, heated to 60-80℃, soaked for 10-15 minutes, then washed with high pressure water gun, and finally dried; Quality inspection, the blade body after substrate cleaning is detected in size, roughness, hardness and appearance, so as to obtain the blade body.

[0011] As a kind of laser cladding paper cutter manufacturing process of the application preferably, in the second step, the blade substrate selection selects high speed steel (HSS) steel plate, and the surface treatment includes thinning the high speed steel plate to the set thickness by milling machine, polishing the surface of the high speed steel plate by polishing device, and cleaning the surface of the high speed steel plate by high pressure water gun.

[0012] As a kind of laser cladding paper cutter manufacturing process of the application preferably, in the second step, the substrate straightening, by leveling machine to the surface treated high speed steel plate is straightened and leveled, straightening and leveling the back surface flatness of blade body is not more than 0.06mm; Laser cutting, by laser cutting machine tool to the substrate straightened high speed steel plate is cut, and the size of the blade blank is cut out; Size measurement, by optical measuring device to the blade blank after cutting is measured, the error between measured value and standard value is not more than 0.15mm.

[0013] As a kind of laser cladding paper cutter manufacturing process of the application preferably, the reserved hole is set in the second step, the reserved hole for fixing is set on the surface of blade blank by drilling mechanism, the reserved hole is adapted to the size of threaded column welded with the surface of blade body embedding groove and position one-to-one correspondence; Milling cutting open blade, the end of blade blank is milled to realize open blade processing by milling machine tool, and the bevel of blade blank is precisely ground to 20±0.5°; Polishing, the surface of blade blank is polished by polishing machine tool; Substrate cleaning, after polishing, blade blank is put into soaking type alkali washing tank, sodium hydroxide cleaning solution is configured, heated to 60-80°C, soaked for 10-15 minutes for four-stage paper cutter, then washed by high-pressure water gun, and finally dried.

[0014] As a kind of laser cladding paper cutter manufacturing process of the application preferably, the quenching and tempering in the second step, the blade blank is first preheated to 550~650°C by air furnace, and the heating time is calculated according to 1~1.5 minutes / mm;Then secondly preheated to 850~900°C, the time is the same as above;Then the blade blank is heated to 1250~1280°C; The blade blank is first tempered at 540~570°C for 1.5~2 hours;Secondly, the blade blank is tempered at 540~570°C for 1.5~2 hours;Then the blade blank is tempered at 540~570°C for 1.5~2 hours.

[0015] As a kind of laser cladding paper cutter manufacturing process of the application preferably, the quality inspection in the second step, the size, roughness, blade hardness and appearance of blade blank are detected by detection equipment, so as to obtain blade.

[0016] Compared with the prior art, the application has the following advantages: The application first cuts carbon alloy steel plate into set blade body blank by laser cutting machine, then mills the blade body blank by milling machine tool, and the pretreatment of blade body blank is completed after milling slot and drilling and tapping, so as to obtain blade body; The same way is used to obtain blade body blank, and the strength of blade body blank can be increased by quenching and tempering, so as to obtain blade; Then alloy powder is cladded on the blade part of paper cutter by laser cladding machine, so as to form a protective layer, and then stress relief annealing is carried out to eliminate the stress in the paper cutter, and then the blade with reserved hole is sleeved on the threaded column of blade body and assembled by nut, so as to obtain paper cutter.

[0017] Thus, the material of the blade body and the blade can be selected according to the use requirement, so that the production cost of the paper cutter is reduced. And the strength of the blade blank can be increased by quenching and tempering, and the strength of the paper cutter is further improved by alloy powder cladding on the blade part of the paper cutter, so that the service life of the paper cutter is increased. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not limit the present application. In the drawings: Fig. 1 A manufacturing process flow diagram of the paper cutter is provided for the embodiments of the present application; Fig. 2 A blade body preparation process flow diagram is provided for the embodiments of the present application; Fig. 3 A blade preparation process flow diagram is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Please refer to Figs. 1-3 The present application provides the following technical solutions: a laser cladding paper cutter manufacturing process, comprising the following steps: First step: blade body preparation, through the processing procedures of blade body base material selection, surface treatment, base material straightening, laser cutting, size measurement, milling slot opening, drilling and tapping, thread post welding, polishing, base material cleaning and quality inspection, a blade body meeting the quality requirements is produced for standby use; Second step: blade preparation, through the processing procedures of blade base material selection, surface treatment, base material straightening, laser cutting, size measurement, reserved hole opening, milling blade opening, polishing, base material cleaning, quenching and tempering, quality inspection and blade edge sharpness test, a blade meeting the quality requirements is produced for standby use; Third step: cladding, the blade treated in the second step is fixed on a laser cladding machine, alloy powder for cladding is added to the surface of the blade, the laser cladding machine is started to cladding the alloy powder for cladding on the surface of the blade, so as to form a secondary blade; Fourth step: stress relief annealing, the secondary blade cladded in the third step is placed in a car bottom resistance furnace, and stress relief annealing is performed by heating to 650-700℃, holding and slow cooling, so as to form a tertiary blade. Fifth step: straightening and leveling, straightening and leveling the three-stage blade after stress relief annealing in the fourth step, the straightening and leveling machine is used to straighten and level the front surface of the three-stage blade, and the front surface flatness is not greater than 0.08 mm; Sixth step: grinding and polishing, the surface of the three-stage blade after straightening and leveling in the fifth step is sequentially rough ground and fine ground by a grinding machine, and the surface of the three-stage blade is polished by a polishing machine; Seventh step: edge grinding, the small burrs on the surface of the three-stage blade after grinding and polishing in the sixth step are removed by an edge grinding machine; Eighth step: surface cleaning, the three-stage blade in the seventh step is put into a soaking alkali washing tank, a sodium hydroxide cleaning solution is configured, heated to 60-80℃, soaked for 10-15 minutes, then washed with a high-pressure water gun, and finally dried; Ninth step: performance detection, the size, roughness, blade hardness and appearance of the three-stage blade after cleaning in the eighth step are detected, so that unqualified three-stage blades are selected out and recycled; Tenth step: edge sharpness test, the qualified three-stage blade in the ninth step is tested by a digital cutting force tester, the cutting speed is set to 150-250 mm / min, the standard paper tape or silicone film with a thickness of 0.2-0.4 mm is used as the test medium, and the peak cutting force ≤50 gf is the qualified final cutting knife; Eleventh step: assembling the blade and the blade body, the reserved hole of the blade is sleeved on the surface of the threaded column of the blade body, and then the threaded connection is performed through the matched nut and threaded column, so that the blade and the blade body can be assembled; Twelfth step: packaging and storage, the final cutting knife in the eleventh step is packaged by a packaging machine and stored in a warehouse.

[0021] In specific use, the blade body and the blade are assembled, different alloy materials can be selected according to the actual hardness requirement, so that the production cost of the cutting knife can be reduced, and a protective layer can be formed on the surface of the cutting knife by cladding, the cutting strength of the cutting knife can be increased by the formed protective layer, the residual stress in the cutting knife can be eliminated by stress relief annealing, and cracking caused by superposition of residual stress in subsequent processing is avoided; Then the cutting knife can be further processed by straightening and leveling, grinding and polishing, edge grinding and surface cleaning, so that the processing of the cladded cutting knife can be realized, and the product quality can be detected by performance detection and edge sharpness test.

[0022] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0023] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun. Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0024] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun. Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0025] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun. Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun. Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0026] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0027] Preferably: in the first step, the carbon alloy steel plate is selected as the cutter base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness by a milling machine, polishing the surface of the carbon alloy steel plate by a polishing device, and cleaning the surface of the carbon alloy steel plate by a high-pressure water gun.

[0028] ​​Preferably, in the second step, the substrate is straightened, and the surface-treated high-speed steel plate is straightened and leveled by a leveling machine, and the back surface of the straightening and leveling cutter body has a flatness of not more than 0.06 mm; Laser cutting, the high-speed steel plate after straightening is cut by a laser cutting machine, and a cutter blade blank with a size that meets the requirements is cut out; Size measurement, the cutter blade blank after cutting is measured by an optical measuring device, and the error between the measured value and the standard value is not more than 0.15 mm.

[0029] Preferably, in the second step, a reserved hole is formed, and a reserved hole for fixing is formed on the surface of the cutter blade blank by a drilling mechanism, the reserved hole is matched in size with the threaded column surface-welded with the cutter body embedding groove and is one-to-one corresponding in position; Milling, the end of the cutter blade blank is milled by a milling machine to realize the opening of the blade, and the bevel of the cutter blade blank is precisely ground to 20±0.5°; Polishing, the surface of the cutter blade blank is polished by a polishing machine; Substrate cleaning, the cutter blade blank after polishing is put into a soaking alkali washing tank, a sodium hydroxide cleaning solution is configured, heated to 60-80°C, soaked for 10-15 minutes, then washed with a high-pressure water gun, and finally dried.

[0030] Preferably, in the second step, quenching and tempering, the cutter blade blank is first preheated to 550-650°C by an air furnace, the heating time is calculated according to 1-1.5 minutes / mm; then secondly preheated to 850-900°C, the time is the same as above; then heated to 1250-1280°C; firstly tempered at 540-570°C for 1.5-2 hours; secondly tempered at 540-570°C for 1.5-2 hours; and thirdly tempered at 540-570°C for 1.5-2 hours.

[0031] Preferably, in the second step, quality inspection, the cutter blade blank is detected in size, roughness, blade hardness and appearance by a detection device, so as to obtain the cutter blade.

[0032] In specific use, the surface treatment, substrate straightening, laser cutting and polishing can realize the processing of the cutter blade blank, at the same time, the size measurement and substrate cleaning can improve the precision of the processed cutter blade blank, then the quenching and tempering can increase the strength of the cutter blade blank, and the quality inspection can improve the quality of the cutter blade blank, so as to produce a cutter blade with high hardness.

[0033] Finally, it should be noted that the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified to the technical solution recorded in the foregoing embodiments, or equivalent replacement of some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A process for manufacturing a laser clad paper cutting knife, characterized in that: The method comprises the following steps: First step: knife body preparation, through the selection of knife body base material, surface treatment, base material straightening, laser cutting, size measurement, milling slot, drilling and tapping, thread column welding, polishing, base material cleaning and quality inspection processing procedures to produce knife body in accordance with the quality requirements of the standby; Second step: knife edge preparation, through the selection of knife edge base material, surface treatment, base material straightening, laser cutting, size measurement, reserved hole setting, milling blade, polishing, base material cleaning, quenching and tempering, quality inspection and blade edge sharpness test processing procedures to produce knife edge in accordance with the quality requirements of the standby; Third step: cladding, fixing the knife edge treated in the second step on the laser cladding machine, adding alloy powder for cladding to the surface of the knife edge, starting the laser cladding machine to cladding the alloy powder for cladding on the surface of the knife edge to the surface of the knife edge, thereby forming a secondary knife edge; Fourth step: stress relief annealing, placing the secondary knife edge cladded in the third step into a car bottom resistance furnace, heating to 650-700 DEG C, holding and then slowly cooling for stress relief annealing, thereby forming a tertiary knife edge; Fifth step: straightening and leveling, straightening and leveling the tertiary knife edge after stress relief annealing in the fourth step, adjusting the straightening and leveling of the tertiary knife edge through a leveling machine, so that the front surface flatness of the tertiary knife edge is not greater than 0.08 mm; Sixth step: polishing, polishing the surface of the tertiary knife edge after straightening and leveling in the fifth step through a polishing machine, and polishing the surface of the tertiary knife edge through a polishing machine; Seventh step: edge grinding, removing the small burrs on the surface of the tertiary knife edge polished in the sixth step through an edge grinding machine; Eighth step: surface cleaning, putting the tertiary knife edge in the seventh step into a soaking type alkali washing tank, configuring sodium hydroxide cleaning solution, heating to 60-80 DEG C, soaking the fourth cutting knife for 10-15 minutes, then washing with a high-pressure water gun, and finally drying; Ninth step: performance detection, detecting the size, roughness, blade hardness and appearance of the tertiary knife edge after cleaning in the eighth step, thereby selecting out the unqualified tertiary knife edge and recycling; Tenth step: blade edge sharpness test, testing the qualified tertiary knife edge in the ninth step through a digital display cutting force tester, setting the cutting speed to 150-250 mm / min, using standard paper tape or silicone film with a thickness of 0.2-0.4 mm as the test medium, and the peak cutting force ≤50 gf is the qualified final cutting knife; Eleventh step: assembling the knife edge and the knife body, fitting the reserved hole of the knife edge on the surface of the threaded column of the knife body, then screwing the threaded column through a matching nut, thereby assembling the knife edge and the knife body; Twelfth step: packaging and warehousing, packaging the final cutting knife in the eleventh step through a packaging machine and storing in a warehouse.

2. A process for manufacturing a laser clad paper cutting knife as claimed in claim 1, wherein: In the first step, the carbon alloy steel plate is selected as the knife body base material, and the surface treatment includes thinning the carbon alloy steel plate to a set thickness through a milling machine, polishing the surface of the carbon alloy steel plate through a polishing device, and cleaning the surface of the carbon alloy steel plate through a high-pressure water gun.

3. A process for manufacturing a laser clad paper cutting knife as claimed in claim 2, wherein: The substrate is straightened in the first step, and the surface-treated carbon alloy steel plate is straightened and leveled by a leveling machine, and the back surface of the straightening and leveling tool body has a flatness of not greater than 0.06 mm; The laser cutting is performed on the straightened carbon alloy steel plate by a laser cutting machine tool to cut out a tool body blank with a size meeting the requirements; The size measurement is performed on the cut tool body blank by an optical measuring device, and the error between the measured value and the standard value is not greater than 0.15 mm.

4. The process for manufacturing a laser clad paper cutting knife according to claim 3, wherein: The milling is performed in the first step, and a fitting groove suitable for fitting the cutting edge is milled on the surface of the tool body by a milling machine; The drilling and tapping are performed, and 10×M20 mm threaded holes are punched on the surface of the tool body by a tapping machine, with a depth of 50 mm; The threaded column is welded in the tool body fitting groove by a welding device.

5. A process for manufacturing a laser clad paper cutting knife as claimed in claim 4, wherein: The grinding and polishing are performed in the first step, and the surface of the fitting groove on the surface of the tool body is ground and polished, and the opening of the threaded hole on the surface of the tool body is ground and deburred; The substrate is cleaned, and the tool body after grinding and polishing is put into a soaking type alkali washing tank, a sodium hydroxide cleaning solution is configured, heated to 60-80°C, soaked for 10-15 minutes, then washed with a high-pressure water gun, and finally dried. The quality inspection is performed on the tool body after the substrate cleaning to detect the size, roughness, hardness and appearance, so as to obtain the tool body.

6. The process for manufacturing a laser clad paper cutting knife as claimed in claim 1, wherein: The cutting edge substrate is selected in the second step, and the surface treatment includes thinning the high-speed steel plate to a set thickness by a milling machine, polishing the surface of the high-speed steel plate by a polishing device, and cleaning the surface of the high-speed steel plate by a high-pressure water gun.

7. A process for manufacturing a laser clad paper cutting knife as claimed in claim 6 wherein: The substrate is straightened in the second step, and the surface-treated high-speed steel plate is straightened and leveled by a leveling machine, and the back surface of the straightening and leveling tool body has a flatness of not greater than 0.06 mm; The laser cutting is performed on the straightened high-speed steel plate by a laser cutting machine tool to cut out a cutting edge blank with a size meeting the requirements; The size measurement is performed on the cut cutting edge blank by an optical measuring device, and the error between the measured value and the standard value is not greater than 0.15 mm.

8. The process for manufacturing a laser clad paper cutting knife according to claim 7, wherein: The reserved hole is opened in the second step, and a reserved hole for fixing is opened on the surface of the cutting edge blank by a drilling mechanism, which is matched in size and position with the threaded column welded on the surface of the tool body fitting groove; The cutting edge is milled in the second step, and the end of the cutting edge blank is milled to realize the cutting edge processing, and the bevel of the cutting edge blank is finely ground to 20±0.5°; The grinding and polishing are performed in the second step, and the surface of the cutting edge blank is ground and polished by a grinding and polishing machine tool; The substrate is cleaned, and the cutting edge blank after grinding and polishing is put into a soaking type alkali washing tank, a sodium hydroxide cleaning solution is configured, heated to 60-80°C, soaked for 10-15 minutes, then washed with a high-pressure water gun, and finally dried.

9. The process for manufacturing a laser clad paper cutting knife according to claim 8, wherein: The quenching and tempering are performed in the second step, the cutting edge blank is first preheated to 550~650°C by an air furnace, the heating time is calculated according to 1~1.5 minutes / mm; then secondly preheated to 850~900°C, the time is the same as above; then the cutting edge blank is heated to 1250~1280°C; The first tempering of the blade blank is performed at 540-570°C for 1.5-2 hours, the second tempering of the blade blank is performed at 540-570°C for 1.5-2 hours, and the third tempering of the blade blank is performed at 540-570°C for 1.5-2 hours.

10. The process for manufacturing a laser clad paper cutting knife according to claim 9, wherein: In the second step, the quality inspection is performed by detecting the size, roughness, hardness and appearance of the blade blank by a detecting device, so as to obtain the blade.

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