A pulp scraper and manufacturing method

Abstract

The present invention provides a pulp scraper and a manufacturing method, the pulp scraper comprises a blade body, reinforcement plates are fixed on both sides of the blade body by fixing parts respectively, the blade body comprises a top fixing part and a bottom blade head part which are formed as one body; the side of the blade head part away from the reel is set as a plane, the side of the blade head part close to the reel is set as a curved surface, the cross section of the curved surface comprises a first curve and a second curve which are smoothly connected to each other; and it satisfies: from the direction close to the reel to the direction away from the reel, the curvature radius of the cross section curve of the curved surface gradually decreases, and the speed of decreasing the curvature radius of the first curve is less than the speed of decreasing the curvature radius of the second curve; on the one hand, the direct scraping contact between the blade head part of a straight line or sharp angle scraper and the reel pulp in the prior art can be replaced by the curved surface, so as to achieve a scraping effect and improve the scraping efficiency while reducing the possible damage to the pulp itself and the scraper itself.

Description

Technical Field

[0001] The invention relates to the technical field of scrapers, and in particular to a pulp scraper and a manufacturing method thereof. Background Art

[0002] The general process steps of papermaking in the prior art are: wood or plant fibers are crushed and mixed with water to make pulp, after which the pulp is boiled and cleaned, corresponding additives are added thereto and mixed evenly, and then after purification and filtration, it is rolled, dried and flattened to form a finished paper roll.

[0003] During the pulp roller extrusion process, large particles protruding from the outer surface of the pulp wrapped on the roll need to be scraped off by a scraper installed on one side of the roll, on the one hand to ensure the orderly progress of the subsequent roller extrusion, drying and flattening processes, and on the other hand to ensure the uniformity of the internal composition of the finished paper roll.

[0004] The existing pulp scraper still has the following defects and shortcomings in actual use:

[0005] 1) The bottom of the pulp scraper is mostly straight or sharp-angled. When scraping off the large particles protruding from the outer surface of the pulp wound on the reel, the contact process with the outer surface of the pulp is sharp, which can easily cause unexpected conditions such as uneven pulp composition and damage, and also easily lead to increased damage to the scraper, which is not conducive to papermaking efficiency and increases the cost of scraper replacement and maintenance;

[0006] 2) The existing pulp scraper with curved surface is often formed in a single arc shape for easy processing and forming, which cannot match the working condition of the drum with the pulp wound around it, and the scraping efficiency is low;

[0007] 3) The design accuracy of the pulp scraper cannot be effectively guaranteed, and there is a lack of prediction and summary of the wear conditions of the same type of pulp scrapers. Therefore, the correction and optimization of the manufacturing preset model are of low effectiveness and low correction efficiency.

[0008] Therefore, there is an urgent need to provide a pulp scraper and a manufacturing method to solve the defects and shortcomings in the above-mentioned prior art. Summary of the invention

[0009] In order to solve the defects and shortcomings in the prior art, the present invention provides a pulp scraper and a manufacturing method thereof.

[0010] The specific scheme provided by the present invention is:

[0011] A pulp scraper, comprising a blade body, with reinforcing plates fixed on both sides of the blade body by fixing parts respectively, and the blade body comprising a top fixing part and a bottom blade head part formed as one piece; characterized in that: the side of the blade head part away from the reel is set as a plane, and the side of the blade head part close to the reel is set as a curved surface, and the cross-section of the curved surface comprises a first curve and a second curve smoothly connected to each other; and satisfies: from the direction close to the reel to the direction away from the reel, the curvature radius of the cross-sectional curve of the curved surface gradually decreases, and the speed of decreasing the curvature radius of the first curve is less than the speed of decreasing the curvature radius of the second curve.

[0012] Furthermore, the present invention also provides a method for manufacturing a pulp scraper, characterized in that it comprises the following steps:

[0013] 1) Determine scraper target parameters;

[0014] 2) Collect scraper substrate parameters;

[0015] 3) Input the scraper substrate parameters and scraper target parameters into the preset model, and determine the recommended process parameters based on the difference between the two;

[0016] 4) Grinding the scraper substrate;

[0017] 5) quenching and tempering the scraper substrate;

[0018] 6) Cutting the scraper substrate into a plurality of blade bodies;

[0019] 7) A fixing hole is provided at the fixing portion at the top of the cutter body;

[0020] 8) Forming the cutter head at the bottom of the cutter body;

[0021] 9) Grinding the formed cutter head;

[0022] 10) Performing tool body inspection on the tool body after forming;

[0023] 11) The qualified tool body is subjected to overall quenching and tempering;

[0024] 12) Grinding the surface of the cutter body;

[0025] 13) Insert the fixing parts on the top fixing part of the cutter body and the reinforcing plates on both sides to achieve fixed assembly;

[0026] 14) Fix the assembled scraper on the scraper stand and perform a usage test on the scraper;

[0027] 15) Analyze the unqualified products and make corrections to the preset model and recommended process parameters based on the analysis results;

[0028] 16) Estimate the predicted wear condition of the scraper through a preset model;

[0029] 17) Collect the actual wear condition of the scraper during use;

[0030] 18) Compare the actual wear condition of the scraper with the predicted wear condition, and make secondary corrections to the preset model and recommended process parameters based on the comparison results.

[0031] As a further preferred embodiment of the present invention,

[0032] In the step 1), the determined scraper target parameters include at least the scraper's three-dimensional size, hardness, flatness, surface roughness and blade head surface parameters;

[0033] In the step 2), the scraper substrate parameters collected include at least the three-dimensional size, hardness, flatness, surface roughness and scraper stand parameters of the substrate;

[0034] In the step 3), the recommended process parameters determined include at least grinding parameters, quenching and tempering parameters, cutting parameters, hole opening parameters, forming parameters, testing parameters and assembly parameters.

[0035] As a further preferred embodiment of the present invention,

[0036] The step 8) comprises the following steps:

[0037] 8.1) Forming the side of the cutter head away from the roll into a flat surface;

[0038] 8.2) Align one side of the flat surface of the cutter head;

[0039] 8.3) Forming the side of the cutter head close to the reel into a curved surface;

[0040] 8.4) Check the curvature of the curved surface on one side of the cutter head.

[0041] As a further preferred embodiment of the present invention,

[0042] The step 8.3) includes the following steps:

[0043] 8.31) forming a radial inner cross section of a side of the cutter head close to the reel into a first curve;

[0044] 8.32) detecting the first curve line shape of the radial inner cross section;

[0045] 8.33) forming a radially outer cross section of a side of the cutter head close to the reel into a second curve;

[0046] 8.34) detecting the second curve line shape of the radial outer cross section;

[0047] 8.35) Smoothly connect the radially inner line and the radially outer line.

[0048] As a further preferred embodiment of the present invention,

[0049] The step 8.4) includes the following steps:

[0050] 8.41) performing a linear curvature test on the first curve of the radial inner section;

[0051] 8.42) Performing a linear curvature test on the second curve of the radially outer section;

[0052] 8.43) performing a curvature test on the connection position between the first curve and the second curve;

[0053] 8.44) Perform curvature test on the entire surface of the cutter head.

[0054] As a further preferred embodiment of the present invention,

[0055] In the step 10), the knife body inspection of the formed knife body includes the appearance inspection and performance inspection of the knife body;

[0056] When the shape of the cutter body fails the inspection, the unqualified products will be sent to the temporary storage for unqualified shapes;

[0057] When the performance test of the cutter body fails, the unqualified products will be sent to the temporary storage for unqualified performance.

[0058] As a further preferred embodiment of the present invention,

[0059] In the step 14), the use detection of the scraper includes the body detection and adaptation detection of the scraper;

[0060] When the scraper body fails the inspection, the unqualified products will be sent to the scraper unqualified temporary storage warehouse;

[0061] When the tool body fails the adaptation test, the unqualified products will be sent to the temporary storage for unqualified adaptation.

[0062] As a further preferred embodiment of the present invention,

[0063] In the step 15), when the unqualified products are analyzed and the recommended process parameters are corrected according to the analysis results:

[0064] When modifying assembly parameters, the analysis results of unqualified products in the temporary storage of unqualified adaptation products are first referred to, and then the analysis results of unqualified products in the temporary storage of unqualified scrapers, the temporary storage of unqualified appearance, and the temporary storage of unqualified performance products are combined;

[0065] When the recommended process parameters other than assembly parameters are modified, the reference priority of the analysis results of the unqualified products in each temporary storage warehouse meets the following requirements: temporary storage warehouse for unqualified performance > temporary storage warehouse for unqualified scrapers > temporary storage warehouse for unqualified appearance > temporary storage warehouse for unqualified adaptation.

[0066] As a further preferred embodiment of the present invention,

[0067] The predicted wear condition in step 16) and the actual wear condition in step 17) at least include: wear area, wear degree and wear time.

[0068] Compared with the prior art, the present invention can achieve the following technical effects:

[0069] 1) The present invention provides a pulp scraper and a manufacturing method thereof, wherein the side of the blade head close to the roll is set as a curved surface. The purpose of such setting is to replace the direct scraping contact between the blade head of a straight or sharp-angled scraper in the prior art and the roll pulp with a curved surface, so as to use a curved surface shape that is more suitable for the rotating motion of the roll to achieve a scraping effect and improve the scraping efficiency while reducing possible damage to the pulp itself and the scraper itself.

[0070] 2) The present invention provides a pulp scraper and a manufacturing method thereof, wherein the cross section of the curved surface includes a first curve and a second curve which are smoothly connected to each other; and the following conditions are met: from the direction close to the reel to the direction away from the reel, the curvature radius of the cross section curve of the curved surface gradually decreases, and the speed of decreasing the curvature radius of the first curve is less than the speed of decreasing the curvature radius of the second curve. The purpose of such a setting is that when the scraper in the prior art is operated and formed in one time using a single arc or other shape, the scraper always keeps in contact with the outer wall of the pulp, so that once the attached matter is scraped off by the scraper, the attached matter can only be scraped off from the front and both sides of the scraper, and may splash while being scraped, and may also splash onto the outer surface of the pulp on the rear side which has passed the scraper position, thereby causing uneven composition of the pulp on the rear side, and at the same time, the scraped material is easily accumulated at the front side of the scraper, increasing the possibility of entering the subsequent pulp, thereby reducing the scraping efficiency. The present application provides a pulp scraper and a manufacturing method thereof, wherein the cross section of the curved surface includes a first curve and a second curve which are smoothly connected to each other, Curve, thereby forming a space at the connection position of the first curve and the second curve, and the scraped attachments can be temporarily retained in the space and discharged through both sides, reducing the adverse effects of unexpected splashing of attachments on the pulp scraping process, and at the same time can reduce the accumulation of a part of the scraped material at the front side of the scraper, reducing the possibility of the scraped material entering the subsequent pulp; at the same time, because the scraper in the prior art always keeps in contact with the outer wall of the pulp, once the scraper and the outer layer of pulp do not match in size, the scraper presses the surface of the pulp too tightly and the internal pressure cannot be discharged, which will cause scratch damage to the pulp at the entire scraper position, and the damaged area is large, which may make the entire section of pulp unusable. The present application forms a space at the connection position of the first curve and the second curve by smoothly connecting the first curve and the second curve, and the space can be used to compensate for and release a part of the pressure at the contact position between the scraper and the pulp, thereby reducing the unexpected damage to the pulp caused by the mismatch in size or excessive pressure between the scraper and the outer wall of the pulp.

[0071] 3) The present invention provides a pulp scraper and a manufacturing method, which respectively conducts shape inspection and performance inspection of the blade body and body inspection and adaptation inspection of the scraper, thereby ensuring through multiple inspection processes that the shape, performance, body and adaptability of the manufactured scraper meet the preset requirements, and respectively conducts corresponding analysis on various unqualified products in various unqualified temporary storage warehouses, and when correcting the recommended process parameters according to the analysis results, the unqualified analysis results of the unqualified products in each unqualified temporary storage warehouse are considered according to different reference priorities, so as to determine the effectiveness of the correction, improve the correction efficiency, and further improve the accuracy and credibility of the recommended process parameters, thereby improving the manufacturing precision and efficiency.

[0072] 4) The present invention provides a pulp scraper and a manufacturing method. The predicted wear condition of the scraper is estimated by a preset model, and the actual wear condition of the scraper during use is collected. The actual wear condition of the scraper is then compared with the predicted wear condition, and the preset model and recommended process parameters are corrected for the second time according to the comparison result, so as to predict and summarize the wear condition of the same type of pulp scraper, effectively improve the accuracy and effectiveness of the correction and optimization of the preset model, and then provide an effective model basis for the subsequent manufacture of this type of pulp scraper, improve the accuracy of the manufacturing process, and improve the manufacturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] like Figure 1 Shown is a schematic structural diagram of a pulp scraper provided by the present invention.

[0074] like Figure 2 Shown is a structural side view of a pulp scraper provided by the present invention. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0077] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] [First embodiment]

[0079] like Figure 1-2 The first embodiment of the present invention is shown in the figure. The embodiment discloses a pulp scraper, which comprises a blade body 1. A reinforcing plate 2 is fixed on both sides of the blade body 1 through fixing members 3. The blade body 1 comprises a top fixing portion 11 and a bottom blade head portion 12 which are formed as one piece.

[0080] like Figure 1 As shown, the side of the blade head 12 away from the roll is set as a plane, and the side of the blade head 12 close to the roll is set as a curved surface, and the cross-section of the curved surface includes a first curve L1 and a second curve L2 that are smoothly connected to each other; the curved surface is used to replace the direct scraping contact between the straight or sharp-angled scraper blade head and the roll pulp in the prior art, and the contact mode of the curved surface shape that is more suitable for the rotational movement of the roll is used. While achieving the scraping effect and improving the scraping efficiency, the possible damage to the pulp itself and the scraper itself is reduced.

[0081] Preferably, the first curve L1 and the second curve L2 in this embodiment also satisfy: the curvature radius of the cross-sectional curve of the curved surface gradually decreases from the direction close to the winding drum to the direction away from the winding drum, and the speed of decreasing the curvature radius of the first curve is less than the speed of decreasing the curvature radius of the second curve. The purpose of such setting is:

[0082] In the prior art, the scraper formed by one-time processing of a single arc or other shape always keeps in contact with the outer wall of the pulp when working (the contact surface between the scraper and the outer wall of the pulp is as shown in FIG. Figure 2 In this way, once the attachments are scraped off by the scraper, the attachments can only be scraped off from the front and sides of the scraper. It is possible that the attachments will splash while being scraped off, and it is also possible that the attachments will splash onto the outer surface of the pulp on the rear side that has passed the scraper position, thereby causing the composition of the pulp on the rear side to be uneven. At the same time, the scraped material is likely to accumulate at the front side of the scraper, increasing the possibility of entering the subsequent pulp, thereby reducing the scraping efficiency. In this solution, the cross section of the curved surface includes a first curve and a second curve that are smoothly connected to each other, and the curvature radius of the cross section curve of the curved surface gradually decreases from the direction close to the reel to the direction away from the reel, and the speed at which the curvature radius of the first curve decreases is less than the speed at which the curvature radius of the second curve decreases, thereby forming a space S at the connection position of the first curve and the second curve, and the scraped attachments can be temporarily retained in the space and discharged from both sides, thereby reducing the adverse effects of unexpected splashing of the attachments on the pulp scraping process, and at the same time, the accumulation amount of a part of the scraped material at the front side of the scraper can be reduced, thereby reducing the possibility of the scraped material entering the subsequent pulp.

[0083] At the same time, since the scraper in the prior art always keeps in contact with the outer wall of the pulp, once the scraper does not match the size of the outer layer of pulp, the scraper presses the surface of the pulp too tightly and the internal pressure cannot be discharged, which will cause scratch damage to the pulp at the entire scraper position. The damaged area is large, and it is possible to make the entire section of pulp unusable. The present application forms a space at the connection position of the first curve and the second curve by smoothly connecting the first curve and the second curve. The space can be used to compensate and release part of the pressure at the contact position between the scraper and the pulp, thereby reducing the unexpected damage to the pulp caused by the mismatch between the outer wall size of the scraper and the pulp or excessive pressure.

[0084] [Second embodiment]

[0085] The second embodiment of the present invention further provides a method for manufacturing the pulp scraper mentioned in the first embodiment, comprising the following steps:

[0086] 1) Determine the scraper target parameters; the scraper target parameters determined in this embodiment include at least the three-dimensional size, hardness, flatness, surface roughness and blade head surface parameters of the scraper;

[0087] 2) Collecting scraper substrate parameters; in this embodiment, the scraper substrate parameters collected include at least the three-dimensional size, hardness, flatness, surface roughness and scraper stand parameters of the substrate;

[0088] 3) Inputting scraper substrate parameters and scraper target parameters into the preset model, and determining recommended process parameters according to the difference between the two; corresponding to the above, the recommended process parameters determined in this embodiment at least include grinding parameters, quenching and tempering parameters, cutting parameters, hole opening parameters, forming parameters, detection parameters and assembly parameters;

[0089] 4) Grind the scraper substrate; the purpose of grinding is to remove obvious defects such as burrs, depressions, wrinkles, etc. on the surface of the substrate;

[0090] 5) Quenching and tempering the scraper substrate; the purpose of quenching and tempering is to eliminate the internal stress of the substrate and achieve uniform stress on the substrate as a whole, so as to facilitate the stable progress of the subsequent cutting process;

[0091] 6) Cut the scraper substrate into a plurality of blade bodies; the blade bodies can be cut once or multiple times as needed;

[0092] 7) A fixing hole is provided at the top fixing portion of the blade body; the fixing hole is used to pass a fixing member 3 to fix the reinforcing plate 2 on both sides;

[0093] 8) Forming the cutter head at the bottom of the cutter body; specifically comprising the following steps:

[0094] 8.1) The side of the cutter head away from the reel is formed into a flat surface; the flat surface is convenient for positioning during installation, and when a certain amount of scraped material is accumulated on the front side, the flat surface is convenient for timely cleaning of the scraped material;

[0095] 8.2) Align one side of the cutter head plane; manual measurement or instrument detection can be used to further ensure the accuracy of the alignment;

[0096] 8.3) forming a curved surface on the side of the cutter head close to the reel; specifically comprising the following steps:

[0097] 8.31) forming a radial inner cross section of a side of the cutter head close to the reel into a first curve;

[0098] 8.32) detecting the first curve line shape of the radial inner cross section;

[0099] 8.33) forming a radially outer cross section of a side of the cutter head close to the reel into a second curve;

[0100] 8.34) detecting the second curve line shape of the radial outer cross section;

[0101] Thus, by forming and correspondingly detecting the first curve and the second curve, it is ensured that the curvature radius of the cross-sectional curve of the curved surface gradually decreases from the direction close to the reel to the direction away from the reel, and the speed at which the curvature radius of the first curve decreases is lower than the speed at which the curvature radius of the second curve decreases, so as to facilitate the formation of the internal space S;

[0102] 8.35) The radial inner line and the radial outer line are smoothly connected to ensure smooth discharge and scraping of materials from both sides;

[0103] 8.4) Perform a curvature test on one side of the blade head curved surface; this is because for different types of scrapers, the shape and curvature of the internal space S will directly affect whether the material discharge and pressure release on both sides are smooth or not, which specifically includes the following steps:

[0104] 8.41) performing a linear curvature test on the first curve of the radial inner section;

[0105] 8.42) Performing a linear curvature test on the second curve of the radially outer section;

[0106] 8.43) performing a curvature test on the connection position between the first curve and the second curve;

[0107] 8.44) Detect the curvature of the entire surface of the cutter head to avoid interruptions or deviations in the curve connection position, which may cause unexpected effects on the overall curvature of the cutter head surface;

[0108] 9) Grinding the formed cutter head to remove debris, burrs and other waste generated during the forming process of the cutter head;

[0109] 10) Performing a knife body inspection on the completed knife body; when performing a knife body inspection on the completed knife body, it includes an appearance inspection and a performance inspection of the knife body;

[0110] When the shape of the cutter body fails the inspection, the unqualified products will be sent to the temporary storage for unqualified shapes;

[0111] When the performance test of the cutter body fails, the unqualified products will be sent to the temporary storage for unqualified performance;

[0112] 11) The qualified cutter body is subjected to overall quenching and tempering to eliminate the internal stress of the cutter body and achieve uniform force on the whole cutter body, so as to facilitate the subsequent grinding and assembly process to proceed stably;

[0113] 12) Grind the surface of the cutter body to ensure the flatness and cleanliness of the overall surface of the conductor;

[0114] 13) Insert the fixing parts on the top fixing part of the cutter body and the reinforcing plates on both sides to achieve fixed assembly;

[0115] 14) Fix the assembled scraper on the scraper stand and perform a use test on the scraper; the use test on the scraper includes a body test and an adaptation test on the scraper;

[0116] When the scraper body fails the inspection, the unqualified products will be sent to the scraper unqualified temporary storage warehouse;

[0117] When the tool body fails the adaptation test, the unqualified products will be sent to the temporary storage for unqualified adaptation;

[0118] 15) Analyze the non-conforming products and make corrections to the preset model and recommended process parameters based on the analysis results. At this time, the non-conforming analysis results of the non-conforming products in each non-conforming temporary storage warehouse can be considered according to different reference priorities to determine the effectiveness of the correction, improve the correction efficiency, and further improve the accuracy and credibility of the recommended process parameters, and improve the manufacturing accuracy and efficiency. For example:

[0119] When the assembly parameters are corrected, the analysis results of the unqualified products in the temporary storage of unqualified adaptation are first referred to, and then the analysis results of the unqualified products in the temporary storage of unqualified scrapers, the temporary storage of unqualified appearance, and the temporary storage of unqualified performance are combined; this is because the unqualified products in the temporary storage of unqualified adaptation are mostly caused by the mismatch with the installation of the scraper stand (size mismatch, hole position or hole size mismatch, etc.), so it needs to be given priority when correcting the assembly parameters, and the reasons for the unqualified products in the temporary storage of unqualified scrapers, the temporary storage of unqualified appearance, and the temporary storage of unqualified performance may also be caused by assembly parameters, so they also need to be combined for reference;

[0120] When correcting the recommended process parameters other than assembly parameters, the reference priority of the analysis results of the unqualified products in each temporary storage warehouse meets the following requirements: performance unqualified temporary storage warehouse > scraper unqualified temporary storage warehouse > appearance unqualified temporary storage warehouse > adaptation unqualified temporary storage warehouse; this is because the unqualified products in the performance unqualified temporary storage warehouse are often not detectable by the naked eye or simple instruments, and the reasons for their unqualifiedness may also require coordinated adjustments of multiple parameters, so their reference priority is ranked first, and since the reference reliability of the unqualified products in the scraper unqualified temporary storage warehouse is higher than that of the unqualified products in the appearance unqualified temporary storage warehouse, their priority ranking is higher, and since the reasons for the unqualified products in the adaptation unqualified temporary storage warehouse are more suitable for priority consideration when correcting the assembly parameters, their priority ranking is at the end when correcting the recommended process parameters other than the assembly parameters;

[0121] 16) Estimate the predicted wear condition of the scraper through a preset model;

[0122] 17) Collecting the actual wear condition of the scraper during use; the predicted wear condition and the actual wear condition in this embodiment at least include: wear area, wear degree and wear time;

[0123] 18) Compare the actual wear condition of the scraper with the predicted wear condition, and make secondary corrections to the preset model and recommended process parameters based on the comparison results;

[0124] The predicted wear condition of the scraper is estimated through the preset model, and the actual wear condition of the scraper during use is collected. The actual wear condition of the scraper is then compared with the predicted wear condition, and the preset model and recommended process parameters are corrected secondary according to the comparison results, so as to predict and summarize the wear condition of the same type of pulp scraper, effectively improve the accuracy and effectiveness of the correction and optimization of the preset model, and then provide an effective model basis for the subsequent manufacture of this type of pulp scraper, improve the accuracy of the manufacturing process, and improve manufacturing efficiency.

[0125] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A pulp scraper, comprising a blade body (1), wherein reinforcing plates (2) are fixed to both sides of the blade body (1) through fixing members (3), and the blade body (1) comprises a top fixing portion (11) and a bottom blade head portion (12) formed in one piece; characterized in that: The side of the blade head (12) away from the reel is set as a plane, and the side of the blade head (12) close to the reel is set as a curved surface, and the cross section of the curved surface includes a first curve and a second curve that are smoothly connected to each other; and it satisfies: from the direction close to the reel to the direction away from the reel, the curvature radius of the cross-sectional curve of the curved surface gradually decreases, and the speed at which the curvature radius of the first curve decreases is less than the speed at which the curvature radius of the second curve decreases; thereby, a space is formed at the connection position of the first curve and the second curve, and the scraped attachments can be temporarily retained in the space and discharged through both sides.

2. A method for manufacturing a pulp scraper according to claim 1, characterized in that: The following steps are involved: 1) Determine scraper target parameters; 2) Collect scraper substrate parameters; 3) Input the scraper substrate parameters and scraper target parameters into the preset model, and determine the recommended process parameters based on the difference between the two; 4) Grinding the scraper substrate; 5) quenching and tempering the scraper substrate; 6) Cutting the scraper substrate into a plurality of blade bodies; 7) A fixing hole is provided at the fixing portion at the top of the cutter body; 8) Forming the cutter head at the bottom of the cutter body; 9) Grinding the formed cutter head; 10) Performing tool body inspection on the tool body after forming; 11) The qualified tool body is subjected to overall quenching and tempering; 12) Grinding the surface of the cutter body; 13) Insert the fixing parts on the top fixing part of the cutter body and the reinforcing plates on both sides to achieve fixed assembly; 14) Fix the assembled scraper on the scraper stand and perform a usage test on the scraper; 15) Analyze the unqualified products and make corrections to the preset model and recommended process parameters based on the analysis results; 16) Estimate the predicted wear condition of the scraper through a preset model; 17) Collect the actual wear condition of the scraper during use; 18) Compare the actual wear condition of the scraper with the predicted wear condition, and make secondary corrections to the preset model and recommended process parameters based on the comparison results.

3. The method for manufacturing a pulp scraper according to claim 2, characterized in that: In the step 1), the determined scraper target parameters include at least the scraper's three-dimensional size, hardness, flatness, surface roughness and blade head surface parameters; In the step 2), the scraper substrate parameters collected include at least the three-dimensional size, hardness, flatness, surface roughness and scraper stand parameters of the substrate; In the step 3), the recommended process parameters determined include at least grinding parameters, quenching and tempering parameters, cutting parameters, hole opening parameters, forming parameters, testing parameters and assembly parameters.

4. The method for manufacturing a pulp scraper according to claim 2, characterized in that: The step 8) comprises the following steps: 8.1) Forming the side of the cutter head away from the roll into a flat surface; 8.2) Align one side of the flat surface of the cutter head; 8.3) Forming the side of the cutter head close to the reel into a curved surface; 8.4) Check the curvature of the curved surface on one side of the cutter head.

5. The method for manufacturing a pulp scraper according to claim 4, characterized in that: The step 8.3) includes the following steps: 8.31) forming a radial inner cross section of a side of the cutter head close to the reel into a first curve; 8.32) detecting the first curve line shape of the radial inner cross section; 8.33) forming a radially outer cross section of a side of the cutter head close to the reel into a second curve; 8.34) detecting the second curve line shape of the radial outer cross section; 8.35) Smoothly connect the radially inner line and the radially outer line.

6. The method for manufacturing a pulp scraper according to claim 5, characterized in that: The step 8.4) includes the following steps: 8.41) performing a linear curvature test on the first curve of the radial inner section; 8.42) Performing a linear curvature test on the second curve of the radially outer section; 8.43) performing a curvature test on the connection position between the first curve and the second curve; 8.44) Perform curvature test on the entire surface of the cutter head.

7. The method for manufacturing a pulp scraper according to claim 3, characterized in that: In the step 10), the knife body inspection of the formed knife body includes the appearance inspection and performance inspection of the knife body; When the shape of the cutter body fails the inspection, the unqualified products will be sent to the temporary storage for unqualified shapes; When the performance test of the cutter body fails, the unqualified products will be sent to the temporary storage for unqualified performance.

8. The method for manufacturing a pulp scraper according to claim 7, characterized in that: In the step 14), the use detection of the scraper includes the body detection and adaptation detection of the scraper; When the scraper body fails the inspection, the unqualified products will be sent to the scraper unqualified temporary storage warehouse; When the tool body fails the adaptation test, the unqualified products will be sent to the temporary storage for unqualified adaptation.

9. The method for manufacturing a pulp scraper according to claim 8, characterized in that: In the step 15), when the unqualified products are analyzed and the recommended process parameters are corrected according to the analysis results: When modifying assembly parameters, the analysis results of unqualified products in the temporary storage of unqualified adaptation products are first referred to, and then the analysis results of unqualified products in the temporary storage of unqualified scrapers, the temporary storage of unqualified appearance, and the temporary storage of unqualified performance products are combined; When the recommended process parameters other than assembly parameters are modified, the reference priority of the analysis results of the unqualified products in each temporary storage warehouse meets the following requirements: temporary storage warehouse for unqualified performance > temporary storage warehouse for unqualified scrapers > temporary storage warehouse for unqualified appearance > temporary storage warehouse for unqualified adaptation.

10. The method for manufacturing a pulp scraper according to claim 2, characterized in that: The predicted wear condition in step 16) and the actual wear condition in step 17) at least include: wear area, wear degree and wear time.

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