Wrinkling scraper and processing method

Abstract

The invention discloses a wrinkling scraper and a processing method, and belongs to the technical field of toilet paper product production cutters. The cutter comprises a base body and a working face formed on the top of the base body, a blade is formed at the junction of the cylinder face of the base body and the working face, grooves distributed at intervals are formed in the working face in the length direction of the working face, and the grooves penetrate through the width direction of the working face. The width of the top of the groove is controlled within the range of 0.08 mm to 0.40 mm, the opening depth of the groove is controlled within the range of 0.06 mm to 0.35 mm, the width of the top of the groove is gradually reduced, and the gradually-reducing direction of the top of the groove is the direction away from the cutting edge. Through the arrangement of the grooves, crisscross wrinkles can be formed on a paper web at the same time, so that the water / oil absorption performance of the wrinkling paper is greatly improved. Meanwhile, the depth and the width of the groove are further optimally designed, so that the phenomenon that normal paper scraping of the blade is affected due to the existence of the groove can be effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of knives for producing toilet paper products, and more specifically, relates to a wrinkling blade and a processing method thereof. Background Art

[0002] In the manufacturing process of wrinkled paper, the softness, bulkiness, stretchability, absorbency, etc. of thin paper are generally achieved through drying on a dryer cylinder and a wrinkling blade. One of the most common methods is to use a wrinkling blade to peel off the paper web attached to the surface of the dryer cylinder, and due to the relatively large relative speed between the wrinkling blade and the paper web, a violent collision occurs when they meet, generating destructive force to break the fiber bonds in the paper web. This method is called wrinkling in the industry. The wrinkled paper not only has a soft handfeel, but also its bulkiness is improved. Since the bulkiness increases, the liquid / oil storage space of the wrinkled paper is increased, thereby enhancing the liquid / oil absorption and storage performance of the wrinkled paper.

[0003] It can be seen that the wrinkling blade plays an important role in the processing of wrinkled paper. A large number of technical improvements on wrinkling blades have also emerged in the prior art. For example, CN110409213A, CN106182906A, CN217810226U, etc. However, since the impact surface of the prior art is basically a flat surface, although it can achieve a certain wrinkling effect, the bulkiness of the wrinkled paper is limited. Therefore, it also limits the water / oil absorption performance of the wrinkled tissue paper, and thus cannot well meet the requirements of papers with high water / oil absorption performance such as kitchen paper and hand wipes. Therefore, designing a wrinkling knife that can process papers with better water / oil absorption performance has important practical significance in production.

[0004] In response to the above-mentioned problems, relevant technical solutions regarding serrated blades have also been proposed in the existing solutions. That is, by designing the impact surface of the wrinkling knife as a serrated shape to enhance the wrinkling effect.

[0005] For example, in the patent of US3163575A, a toothed or serrated blade is used. Different from the fine wrinkles generated by the traditional flat blade, the serrated blade can form coarser and more irregular raised stripes, thereby making the sheet have a greater depth.

[0006] In the patent of CN215164161U, a wrinkling blade, a wrinkling device and paper are disclosed. In this application, through the setting of the wrinkling part, multiple micro-wrinkles can be generated in the position of the continuous paper web at the wrinkling part; as the paper web continues to move on the working surface, multiple micro-wrinkles are stacked in the direction perpendicular to the paper surface of the wrinkled paper until the Yankee dryer cylinder surface pushes out multiple stacked micro-wrinkles to form large wrinkles, which is conducive to the formation of a three-dimensional wrinkling structure during the wrinkling process of the paper web, improving the bulkiness of the wrinkled paper, and thus enhancing the liquid / oil absorption and storage performance.

[0007] In the above applications, the serrated blade technology is adopted to improve the wrinkling effect. However, since the wrinkles on the paper web all extend along the width direction of the paper web, no wrinkles are formed in the length direction of the paper web. Therefore, its liquid / oil absorption performance still needs to be further improved. Summary of the Invention

[0008] 1. Problems to be Solved

[0009] Aiming at the problem that the wrinkled paper processed by the existing wrinkling blade has limited water / oil absorption performance and cannot well meet the requirements of papers with high water / oil absorption performance such as kitchen paper and hand wipes, the present invention provides a wrinkling blade. Through the longitudinally arranged grooves, criss-cross wrinkling strips can be formed on the paper web, thereby greatly improving the water / oil absorption performance of the wrinkled paper. At the same time, by controlling the width and depth of the grooves, while effectively avoiding scratching the paper web, it is also beneficial to the formation of wrinkling strips.

[0010] 2. Technical Solutions

[0011] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0012] A wrinkling blade of the present invention includes a base body and a working surface formed on the top of the base body. A blade edge is formed at the junction between the cylinder-facing surface of the base body and the working surface. The working surface is provided with grooves distributed at intervals along its length direction, and the grooves are arranged through the width direction of the working surface; wherein,

[0013] The bottom width of the groove is not greater than the top width, the top width is controlled within the range of 0.08 - 0.40 mm, and the top width is tapered. The end close to the blade edge is the large notch end, and the other end is the small notch end, and the difference in width between the two ends is 0.08 - 0.28 mm;

[0014] The opening depth of the groove is controlled within the range of 0.06 - 0.35 mm.

[0015] In some embodiments, the width of the large notch end is 0.12 - 0.35 mm, the width of the small notch end is 0.09 - 0.20 mm, and the difference in width between the two is 0.10 - 0.15 mm.

[0016] In some embodiments, the opening depth of the groove is tapered along the width direction of the working surface, and the tapered direction is the same as the tapered direction of the top width, and the difference in depth between the two ends is controlled within the range of 0.04 - 0.14 mm.

[0017] In some embodiments, the depth of the large notch end is 0.11 - 0.32 mm, the depth of the small notch end is 0.07 - 0.18 mm, and the width difference between the two is 0.08 - 0.12 mm.

[0018] In some embodiments, the distribution density of the grooves along the length direction of the working surface is 8 - 12 grooves / cm.

[0019] In some embodiments, the grooves are generally V-shaped as a whole, and the depth-to-width ratio of the V-shaped groove is 0.6 - 1.2.

[0020] In some embodiments, an inclined friction surface is formed on the upper part of the matrix adjacent to the cylinder surface, and the intersection between the friction surface and the working surface forms the cutting edge;

[0021] A grinding surface is formed between the upper part of the back cylinder surface of the matrix and the working surface, and the grinding surface is inclined as a whole towards the friction surface side.

[0022] In some embodiments, the angle α1 between the working surface and the horizontal plane is 0 - 10°; the angle α2 between the friction surface and the vertical plane is 0 - 8°; the angle α3 between the grinding surface and the vertical plane is 0 - 12°.

[0023] In some embodiments, the working surface and the grooves thereon are sprayed with a wear-resistant layer; wherein, the hardness of the wear-resistant layer is HV900 - 1300; the thickness is 20 μm - 100 μm.

[0024] In some embodiments, the grooves are formed by hobbing process, and the hardness of the matrix is HRC30 - 65.

[0025] The present invention also provides a processing technology for the wrinkling scraper, and the processing steps are as follows:

[0026] S1. Grooves are processed at intervals along the length direction on the top of the matrix;

[0027] S2. In the depth range of the grooves, the matrix is obliquely cut to form an inclined working surface; meanwhile, grooves with both depth and width decreasing are formed on the working surface;

[0028] S3. The grooves are polished and deburred; meanwhile, a friction surface is formed on the upper part of one side of the matrix, and a grinding surface is formed on the upper part of the other side of the matrix.

[0029] In some embodiments, the grooves are formed by hobbing rolling, and in the area of the matrix where the grooves are processed, its hardness does not exceed HRC70.

[0030] In some embodiments, the matrix is made of strip steel, and its hardness is HRC35 - 65.

[0031] In some embodiments, after step S3, a spraying process is further included.

[0032] Specifically, on the working surface, a wear-resistant layer is sprayed inside the groove; among them,

[0033] the hardness of the wear-resistant layer is not less than HV900, and the thickness is controlled within 15μm - 85μm.

[0034] 3. Beneficial effects

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] (1) For a wrinkling blade of the present invention, by providing a groove penetrating the width of the working surface on the working surface, first folds and second folds that intersect horizontally and vertically can be formed on the paper web; compared with traditional wrinkling blades, only folds can be formed in a single direction of the paper web; the horizontally and vertically intersecting folds can greatly improve the wrinkling effect of the paper web, and thus are beneficial to enhancing the water / oil absorption performance of the wrinkled paper. At the same time, by strictly controlling the depth and width of the groove, the problem that the blade is likely to damage the paper due to the existence of the groove can be effectively avoided.

[0037] (2) For a wrinkling blade of the present invention, by designing the top width of the groove to be tapered and controlling the tapering direction and degree, the damage to the already formed second folds caused by the lateral tension of the paper web can be effectively overcome, which is beneficial to the formation of the second folds. At the same time, since the frictional resistance of the paper web at the groove is increased compared with the plane during the forward movement of the paper web, the stacking time will be prolonged, which is also beneficial to the formation of the first folds. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of a wrinkling blade of the present invention;

[0039] Figure 2 is Figure 1 a partial enlarged schematic view of part A in

[0040] Figure 3 is a top view of a wrinkling blade of the present invention;

[0041] Figure 4 is Figure 3 a partial enlarged schematic view of part B in

[0042] Figure 5 is a side view of a wrinkling blade of the present invention;

[0043] Figure 6 is Figure 5 a partial enlarged schematic view of part C in

[0044] Figure 7 The front view of a wrinkling scraper according to the present invention;

[0045] Figure 8 is Figure 7 the partial enlarged schematic view at position D in

[0046] In the figure: 100, the substrate; 110, the working surface; 120, the groove; 130, the cutting edge; 140, the friction surface; 150, the grinding surface. Specific embodiments

[0047] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In view of the limited water / oil absorption performance of the existing wrinkled paper towels, it is thus unable to well meet the requirements of papers with high water absorption performance such as kitchen paper and hand wipes. In the prior art, it is proposed to increase the wrinkling thickness by providing a recess on the wrinkling knife to improve the water absorption and oil absorption performance of the paper towel. However, the recess in the prior art extends along the length direction of the wrinkling knife. Although it can effectively improve the wrinkling effect of the paper web in the length direction, the wrinkling effect of the paper web in the width direction has not been effectively improved. Therefore, there is still room for improvement in the water / oil absorption performance of the wrinkled paper processed by this type of scraper.

[0050] In view of the above problems, the optimal solution that can be thought of is to also provide a recess in the width direction of the wrinkling knife to meet the simultaneous wrinkling of the paper web in the length and width directions. However, due to the existence of the recess in the width direction, the opening of the recess is likely to scratch or even tear the paper web. Thus, this solution cannot be applied in actual production.

[0051] The present invention provides a wrinkling scraper, and its main purpose is to form horizontal and vertical intersecting wrinkles on the wrinkled paper product without affecting the normal paper scraping of the wrinkling scraper, so as to maximize the wrinkling effect of the paper web, thereby further improving the water absorption and oil absorption performance of the wrinkled paper product.

[0052] The present invention will be further described below in conjunction with specific embodiments.

[0053] Referring to Figures 1 - 2 As shown, a wrinkling doctor blade in this embodiment includes a base body 100 and a working surface 110 formed on the top of the base body 100. A blade edge 130 is formed at the junction between the cylinder-contact surface of the base body 100 and the working surface 110. Among them, the blade edge 130 contacts the surface of the dryer cylinder and is used to assist in peeling the dried paper web from the surface of the dryer cylinder. The working surface 110 is used to collide with the peeled paper web and form wrinkles.

[0054] On the working surface 110, grooves 120 are provided at intervals along its length direction, and the grooves 120 are arranged in a direction penetrating the width direction of the working surface 110. It should be noted that in this embodiment, the Figure 1 X direction is defined as the length direction of the doctor blade; the Y direction is defined as the width direction of the doctor blade, that is, the thickness direction; the Z direction is defined as the height direction of the doctor blade. At the same time, the conveying direction of the paper web is defined as the length direction of the paper web, and the direction extending along the length direction of the doctor blade is defined as the width direction of the paper web.

[0055] Compared with the traditional wrinkling doctor blade, which can only form wrinkles in a single direction of the paper web, the wrinkling doctor blade of this embodiment can form horizontal and vertical criss-cross wrinkles on the paper web simultaneously through the setting of the grooves 120, thereby greatly improving the wrinkling effect of the paper web and being beneficial to enhancing the water / oil absorption performance of the wrinkled paper.

[0056] It can be understood that the presence of the grooves 120 will have an adverse impact on the normal paper scraping operation of the paper web, and it is easy to cause the paper web to be scratched or even torn. The main parameters affecting the paper web scratching by the doctor blade include the depth, width and spacing of the grooves 120, etc.; at the same time, these parameters also have a great impact on the wrinkling effect of the paper web. Therefore, in this embodiment, the above parameters are further limited to ensure the best wrinkling effect under the premise of normal paper scraping.

[0057] Specifically, referring to Figure 3 、 Figure 4As shown, in this embodiment, the bottom width of the groove 120 is not greater than the top width, and the top width is controlled within the range of 0.08 - 0.40 mm. For example, 0.10 mm, 0.25 mm, 0.35 mm, etc. The opening depth of the groove 120 is controlled within the range of 0.06 - 0.35 mm. For example, 0.1 mm, 0.2 mm, 0.3 mm, etc. It is not difficult to understand that the control of the above width and depth needs to meet the conditions simultaneously to achieve the best effect. That is to say, in this embodiment, by jointly controlling the top width and the opening depth of the groove 120, it is possible to ensure that crosswise and longitudinal wrinkles are formed on the paper web without scratching the paper web, thereby improving the water / oil absorption performance of the wrinkled paper. Of course, to assist the paper web to smoothly detach from the cylinder body, a release agent can be coated on the surface of the cylinder body. As a mature existing technology, the specific principle and application of the release agent are well known to those skilled in the art, and will not be elaborated here.

[0058] In this embodiment, the formation of wrinkles (denoted as the first wrinkles) in the length direction of the wrinkled paper is the same as the working principle of a traditional doctor blade, that is, they are both formed by the paper web piling up along its conveying direction on the working surface 110. The difference is that due to the presence of the groove 120 in this embodiment, the friction between the paper web and the working surface 110 will be increased, thereby prolonging the piling time and thus being beneficial to the formation of the first wrinkles. The formation of wrinkles in the width direction (denoted as the second wrinkles) mainly depends on the paper web filling in the groove 120; that is to say, the shape and size of a single second wrinkle are jointly determined by the width and depth of the groove 120, while the overall distribution effect of the second wrinkles in the width direction of the paper web is determined by the spacing between adjacent grooves 120. If the spacing between adjacent grooves 120 is too large, the second wrinkles will be relatively sparse, which is not conducive to improving the distribution density of the second wrinkles, thus affecting the final water / oil absorption performance of the wrinkled paper. If the spacing between adjacent grooves 120 is too small, theoretically it is beneficial to improve the distribution density of the second wrinkles. However, it is found in actual operation that the over-dense distribution of the grooves 120 will lead to too many notches on the blade 130, thereby greatly increasing the risk of scratching the paper web. Therefore, in this embodiment, the distribution density of the grooves 120 in the length direction of the working surface 110 is controlled at 5 - 14 per cm to ensure that while reducing the risk of scratching the paper web, the second wrinkles maintain a high distribution density. Preferably, it is 8 - 12 per cm. For example, 9 per cm, 10 per cm, 11 per cm, etc.

[0059] As an alternative embodiment of the groove 120, the groove 120 is generally V-shaped as a whole, and its cross-section can be approximately regarded as a triangle. In this embodiment, on the basis of controlling the depth and width of the groove 120, further, the depth-width ratio of the groove 120 is controlled to be 0.6-1.2, such as 0.7, 0.9, 1.0, etc., preferably 0.8-1.1. By controlling the depth, width, and depth-width ratio of the groove 120, the overall shape of the groove 120 can be further determined to better balance the wrinkling effect and the relationship between preventing the paper web from being scratched. It should be noted that the depth-width ratio here is the ratio of the top width of the groove 120 to the opening depth.

[0060] Referring to FIG. 4, as another alternative embodiment of the groove 120 in this embodiment, the top width of the groove 120 is tapered, and its tapering direction is away from the cutting edge 130. It should be noted that when the groove 120 is tapered, the top width, depth, and depth-width ratio at each cross-section thereof need to meet the above requirements. At the same time, for the convenience of the following description, the area where the paper web starts to contact the working surface 110 is defined as the M area, and the area between the M area and the cutting edge 130 is defined as the P area.

[0061] Specifically, one end of the groove 120 close to the cutting edge 130 is the large notch end, and its width L2 is controlled to be 0.12-0.35 mm, for example, 0.14 mm, 0.22 mm, 0.33 mm, etc.; the end away from the cutting edge 130 is the small notch end, and its width L1 is controlled to be 0.09-0.20 mm, for example, 0.11 mm, 0.14 mm, 0.17 mm, etc. The advantage of such a design is that when the paper web contacts the M area of the working surface 110 and a first wrinkle is generated by accumulation in the P area; at this time, a part of the paper web fills in the groove 120 to form a second wrinkle. As the paper web continuously moves forward in the P area (the forward movement direction is close to the M area), it will also cause a certain compression on the paper web filled in the groove 120. During the compression process, since the width of the groove 120 is tapered, the destruction of the second wrinkle already formed by the lateral tension of the paper web can be effectively overcome, which is beneficial to the formation of the second wrinkle. At the same time, since the frictional resistance of the paper web at the groove 120 will increase compared with the plane during the forward movement process, the accumulation time will be prolonged, which is also beneficial to the formation of the first wrinkle.

[0062] It should be noted that since the thickness of the wrinkling blade is usually relatively thin, generally ranging from 0.6 mm to 1.5 mm. Although the size and spacing of the width of the groove 120 are limited, the wrinkling effect can be ensured. However, if the taper of the width of the groove 120 is too gentle, the effect of the taper setting cannot be reflected. But if the taper amplitude is too large, the actual width of the M area will be greatly reduced, which is not conducive to the formation of wrinkles. Therefore, in this embodiment, the width difference between the two ends of the large and small notches is controlled within the range of 0.08 - 0.28 mm, for example, 0.11 mm, 0.17 mm, 0.24 mm, etc., and preferably 0.10 - 0.15 mm.

[0063] Of course, the taper direction of the groove 120 can also be set in the opposite direction to the above, that is, the end close to the blade 130 is the small notch end, and the end far from the blade 130 is the large notch end. Through the above analysis, this design is obviously not conducive to the formation of the second wrinkle. However, this design makes the notch left by the groove 120 on the blade smaller, which has certain advantages in preventing the paper web from being scratched.

[0064] Furthermore, referring to Figure 7 、 Figure 8 As shown, the opening depth of the groove 120 is also set in a tapered shape, and its taper direction is also away from the blade 130. That is, the end close to the blade 130 is the large notch end, and its depth H1 is controlled within the range of 0.11 - 0.32 mm, for example, 0.15 mm, 0.24 mm, 0.29 mm, etc.; the end far from the blade 130 is the small notch end, and its depth H2 is controlled within the range of 0.07 - 0.18 mm, for example, 0.08 mm, 0.13 mm, 0.17 mm, etc. At the same time, the depth difference between the two ends is controlled within the range of 0.04 - 0.14 mm, for example, 0.07 mm, 0.09 mm, 0.13 mm, etc., and preferably 0.08 - 0.12 mm. By setting the depth of the groove 120 in a tapered shape and controlling the degree of the depth taper, the influence of the lateral tension of the paper web on the second wrinkle during the extrusion molding process can also be offset, which is conducive to the formation of the second wrinkle.

[0065] In this embodiment, during the process of wrinkling when the paper web collides with the working surface 110, some debris will inevitably be generated due to the destruction of the fiber bonds in the paper web. And these debris will gradually fill the groove 120, thereby changing the actual wrinkling width and depth of the groove 120, and further affecting the final wrinkling effect of the paper web. In this embodiment, through the dual tapered settings of the width and depth of the groove 120, and the tapered direction is consistent with the overall moving direction of the paper web. During the movement of the paper web, the debris in the groove 120 is more likely to be carried to the area far from the blade 130, which is beneficial to extending the service life of the scraper. Of course, it is impossible to completely avoid the filling of debris in the groove 120. After working for a certain period of time, in order to ensure the wrinkling effect, it is still necessary to clean the debris in the groove 120. However, the dual tapered settings of the groove width and depth are also beneficial to the cleaning operation of the debris.

[0066] Reference Figure 5 、 Figure 6 As shown in the reference, a wrinkling scraper in this embodiment has an overall inclined working surface 110, and its inclination angle α1 is 0 - 10°, for example, 3°, 6°, 8°, etc., to ensure that the first fold has an appropriate thickness, so as to keep the wrinkled paper having a good hand feeling. At the same time, in order to further improve the wear resistance of the working surface 110 and extend its service life, a wear-resistant layer (not shown in the figure) can be sprayed on the working surface 110 and the groove 120 thereon. Among them, the material of the wear-resistant layer is a combination of one or more of metal oxides, ceramic materials, silicates, carbides, borides and nitrides. For example, chromium trioxide and titanium dioxide materials are selected. There are many technical disclosures in the prior art and will not be elaborated here.

[0067] Preferably, the thickness of the wear-resistant layer is 20μm - 100μm, such as 20μm, 60μm, 80μm, etc. The selection of this thickness not only meets the requirements of wear resistance but also does not cause too much interference to the size of the groove 120. The hardness of the wear-resistant layer is HV900 - 1300, for example, 920HV, 1000HV, 1100HV, 1200HV, etc. At the same time, it should be noted that the width and depth of the groove mentioned in the above embodiment are both after spraying the wear-resistant layer.

[0068] In this embodiment, due to the small width of the groove 120, it is preferably formed by a hobbing process. Compared with the shot peening / sandblasting process, the hobbing process can more accurately control the size of the groove 120 to ensure the consistency of the second fold shape. At the same time, the hobbing process can keep the working surface 110 in good surface quality and reduce the risk of scratching the paper web.

[0069] In addition, due to the long length of the doctor blade, sufficient lateral hardness support is required. Otherwise, due to gravity and other reasons, bending may occur, resulting in uneven thickness of the processed paper. However, if the hardness is too high, it is not conducive to the processing and forming of the groove 120. Therefore, in this embodiment, the hardness of the substrate 100 is controlled within the range of HRC30 - 65, preferably HRC40 - 55, such as 42HRC, 45HRC, 47HRC, etc.

[0070] In some embodiments, a friction surface 140 is formed on the upper part of the substrate 100 on the cylinder side, and a cutting edge 130 is formed at the junction between the friction surface 140 and the working surface 110. At the same time, the upper end of the friction surface 140 deviates away from the dryer cylinder, and the deviation angle α2 is 0 - 8°, for example, 2°, 5°, 7°, etc., to change the cylinder contact angle.

[0071] In other embodiments, a grinding surface 150 is formed between the upper part of the substrate 100 on the non - cylinder side and the working surface 110. The upper end of the grinding surface 150 is inclined as a whole towards the friction surface 140, and its inclination angle α3 is 0 - 12°, for example, 1°, 4°, 9°, etc. The grinding surface 150 is actually formed after grinding the metal burrs extruded to the non - cylinder side after the groove 120 is roll - formed, thereby effectively avoiding scratching the paper web.

[0072] This embodiment also provides a processing technology for the wrinkling doctor blade.

[0073] First, select a strip steel that meets the basic dimensional requirements as the substrate 100, and the hardness of the strip steel is preferably HRC25 - 70;

[0074] Next, form grooves 120 distributed at intervals along the length direction of the substrate 100 on the top of the substrate 100 by a rolling process; at this time, the sizes of the grooves 120 are basically the same;

[0075] Then, perform beveling on the area of the substrate 100 where the grooves 120 are formed to form an inclined working surface 110; at the same time, grooves 120 with both the depth and width decreasing are formed on the working surface 110, and the direction of gradual reduction is away from the cylinder - side surface of the substrate 100;

[0076] Next, grind the grooves 120 and their peripheries to remove metal burrs; at the same time, form a friction surface 140 on the upper part of the cylinder - side surface of the substrate 100 and a grinding surface 150 on the upper part of the non - cylinder side surface of the substrate 100;

[0077] Finally, perform a spraying process on the surface of the working surface 110, including the inside of the grooves 120, to form a wear - resistant layer.

[0078] In addition, this embodiment further provides a wrinkling device, including a tool rest and a wrinkling scraper disposed on the tool rest. Grooves 120 are provided at intervals along the length direction on the working surface 110 of the wrinkling scraper, and the grooves 120 are arranged in a direction penetrating the width direction of the working surface 110. The bottom width of the groove 120 is not greater than the top width, and the top width is controlled within the range of 0.08 - 0.35 mm, and the top width is tapered, with the end near the cutting edge 130 being the large notch end and the other end being the small notch end, and the difference in width between the two ends is 0.08 - 0.28 mm. The opening depth of the groove 120 is controlled within the range of 0.06 - 0.30 mm, and the opening depth is tapered along the width direction of the working surface 110, and its tapered direction is the same as that of the top width, and the difference in depth between the two ends is controlled within the range of 0.04 - 0.14 mm.

[0079] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A wrinkling scraper, comprising a base (100) and a working surface (110) formed on the top of the base (100), wherein a blade (130) is formed at the junction between the cylinder surface of the base (100) and the working surface (110), characterized in that: The working surface (110) is provided with grooves (120) distributed at intervals along its length direction, and the grooves (120) are arranged to penetrate the width direction of the working surface (110); wherein, The bottom width of the groove (120) is not greater than the top width, the top width is controlled within the range of 0.08-0.40 mm, and the top width is gradually reduced, one end close to the blade (130) is a large notch end, and the other end is a small notch end, and the difference in width between the two ends is 0.08-0.28 mm; The depth of the groove (120) is controlled within the range of 0.06-0.35 mm.

2. A wrinkling scraper according to claim 1, characterized in that: The width of the large notch end is 0.12-0.35 mm, the width of the small notch end is 0.09-0.20 mm, and the difference between the widths is 0.10-0.15 mm.

3. A wrinkling scraper according to claim 1 or 2, characterized in that: The depth of the groove (120) is gradually reduced along the width direction of the working surface (110), the gradually reduced direction is consistent with the gradually reduced direction of the top width, and the difference in depth between the two ends is controlled within the range of 0.04-0.14 mm.

4. A wrinkling scraper according to claim 3, characterized in that: The depth of the large notch end is 0.11-0.32 mm, the depth of the small notch end is 0.07-0.18 mm, and the width difference between the two is 0.08-0.12 mm.

5. A wrinkling scraper according to claim 3, characterized in that: The distribution density of the grooves (120) along the length direction of the working surface (110) is 8-12 / cm.

6. A wrinkling scraper according to claim 5, characterized in that: The groove (120) is V-shaped as a whole, and the depth-to-width ratio of the V-shaped groove is 0.6-1.

2.

7. A wrinkling scraper according to claim 1, characterized in that: The upper part of the base body (100) close to the cylinder surface forms an inclined friction surface (140), and the intersection between the friction surface (140) and the working surface (110) forms the blade (130); A grinding surface (150) is formed between the upper portion of the back-to-cylinder surface of the base (100) and the working surface (110), and the grinding surface (150) is inclined toward the friction surface (140) as a whole.

8. A wrinkling scraper according to claim 7, characterized in that: The included angle α1 between the working surface (110) and the horizontal surface is 0-10°; the included angle α2 between the friction surface (140) and the vertical surface is 0-8°; and the included angle α3 between the grinding surface (150) and the vertical surface is 0-12°.

9. A wrinkling scraper according to claim 7, characterized in that: A wear-resistant layer is sprayed on the working surface (110) and the groove (120) thereon; wherein the hardness of the wear-resistant layer is HV900-1300 and the thickness is 20 μm-100 μm.

10. The wrinkling scraper according to claim 1, characterized in that: The groove (120) is formed by a gear hobbing process, and the hardness of the base (100) is HRC30-65.

11. A processing technology for a wrinkling scraper, characterized in that: The processing steps are: S1. Grooves (120) are processed on the top of the base (100) and are distributed at intervals along the length direction thereof; S2, beveling the base (100) within the depth range of the groove (120) to form an inclined working surface (110); at the same time, forming a groove (120) with a reduced depth and width on the working surface (110); S3, grinding and deburring the groove (120); at the same time, forming a friction surface (140) on the upper part of one side of the base (100), and forming a grinding surface (150) on the upper part of the other side of the base (100).

12. A processing technology for a wrinkling scraper according to claim 11, characterized in that: The groove (120) is formed by rolling through a gear hobbing process, and the hardness of the area on the base body (100) where the groove (120) is machined does not exceed HRC70.

13. A wrinkling scraper processing technology according to claim 12, characterized in that: The substrate (100) is made of strip steel with a hardness of HRC35-65.

14. A wrinkling scraper processing process according to any one of claims 11 to 13, characterized in that: After step S3, a spraying process is also included. Specifically, a wear-resistant layer is sprayed on the working surface (110), including the interior of the groove (120); wherein, The hardness of the wear-resistant layer is not less than HV900, and the thickness is controlled within a range of 15 μm to 85 μm.

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