Sheet forming tool

Abstract

The invention provides a sheet forming tool which is used for manufacturing corrugated sheets and comprises an upper tool assembly and a lower tool assembly, the upper tool assembly and the lower tool assembly respectively comprise a base and a plurality of finger-shaped elements, and the plurality of upper finger-shaped elements and the plurality of lower finger-shaped elements are respectively inserted into the upper base and the lower base at intervals in the feeding direction. The upper finger-shaped elements and the lower finger-shaped elements are oppositely and alternately arranged and are used for stamping the sheet-shaped materials to form corrugations of the corrugated sheet; the inner wall faces of the upper base and the lower base abut against the side walls of the upper finger-shaped element and the lower finger-shaped element respectively. According to the sheet forming tool, the forming element and the fixing element which are prone to abrasion are manufactured in a split mode, only the damaged finger-shaped element needs to be replaced, the whole sheet forming tool does not need to be replaced, and therefore the replacement time is shortened, the production efficiency is improved, and the replacement cost is also saved. And the matching structure of the finger-shaped element and the base is simple, so that the stress concentration is avoided, and the occurrence probability of damage is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of material forming, in particular to a sheet forming tool. Background Art

[0002] In many industrial fields such as general chemical and petrochemical industries, with the expansion of production scale and the improvement of product quality requirements, higher requirements are placed on the performance of separation equipment. As a highly efficient mass and heat transfer equipment, packed towers have been widely used.

[0003] The separation material used in the packing tower is corrugated sheet. In the forming process of sheet materials, a stainless steel precision thin strip is generally sent from one end of the equipment into the packing forming tool. The forming tool includes an upper tool assembly and a lower tool assembly. Under the stamping action of the upper tool assembly and the lower tool assembly, the stainless steel precision thin strip completes the forming process of the regular packing sheet and then comes out from the other end of the packing forming tool.

[0004] However, existing forming tools for manufacturing corrugated sheeting face a significant challenge. The large contact surface between the forming elements in the mold and the material increases friction, leading to wear. Furthermore, the complex structure of the forming elements complicates processing, leading to stress concentration and prone to cracking and damage during use. Furthermore, due to structural issues with the forming elements, the adjustment margin is relatively small, rendering even minor wear ineffective. These factors limit the mold's service life and efficiency, forcing the replacement of the forming elements. However, replacement is time-consuming, and due to structural issues, forming elements in different locations cannot be interchanged, requiring the entire set to be replaced, rather than individual replacements. This excessively long replacement process, often requiring several hours, significantly impacts efficiency. Furthermore, the complex structure of the forming elements, coupled with the need to replace the entire set, results in high processing costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a sheet forming tool in order to overcome the defects in the prior art that the forming tool of the corrugated sheet is easily damaged, takes a long time to replace, and leads to low production efficiency.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A sheet forming tool for manufacturing a corrugated sheet, the sheet forming tool comprising an upper tool assembly and a lower tool assembly, the upper tool assembly comprising an upper base and a plurality of upper finger elements, the lower tool assembly comprising a lower base and a plurality of lower finger elements, each of the upper finger elements and each of the lower finger elements extending perpendicular to a feed direction in which the corrugated sheet is conveyed;

[0008] The plurality of upper finger-shaped elements are inserted into the upper base at intervals along the feeding direction, and the plurality of lower finger-shaped elements are inserted into the lower base at intervals along the feeding direction. The upper finger-shaped elements and the lower finger-shaped elements are arranged oppositely and alternately, and are used to punch the sheet material to form the corrugations of the corrugated sheet;

[0009] The inner wall surface of the upper base for inserting the upper finger-like element extends to both ends of the upper finger-like element perpendicular to the feeding direction and abuts against the side walls of the upper finger-like element; the inner wall surface of the lower base for inserting the lower finger-like element extends to both ends of the lower finger-like element perpendicular to the feeding direction and abuts against the side walls of the lower finger-like element.

[0010] In this embodiment, upper and lower finger-like elements serve as cooperating forming elements. The sheet forming tool utilizes these elements, positioned in an alternating, opposing arrangement. When these elements move relative to each other, they stamp peaks and troughs into the sheet material, forming a corrugated sheet. These elements are removably connected to the upper and lower bases, respectively, by inserting them. This allows for the separate manufacturing of wear-prone forming elements from the fixed elements (i.e., the upper and lower bases), facilitating replacement of these elements. If one of the finger-like elements becomes damaged, only the damaged one needs to be removed and replaced, without having to replace the entire sheet forming tool. This reduces replacement time, improves production efficiency, and reduces replacement costs. Furthermore, the upper base utilizes the aforementioned configuration, with its inner wall extending to both ends of the upper finger-like elements and abutting against their sidewalls. This means that the entire sidewalls of the upper finger-like elements are clamped within the upper base, ensuring that the structural stability of the entire sheet forming tool is not compromised by the removable forming elements. At the same time, since the forming element is detachable, the forming element can adopt a finger-like structure with a relatively regular shape, which simplifies the matching structure with the upper and lower bases, thereby avoiding stress concentration and reducing the probability of damage.

[0011] Preferably, the upper base is provided with a plurality of slots cooperating with the upper finger-shaped elements; and / or the lower base is provided with a plurality of slots cooperating with the lower finger-shaped elements.

[0012] In this solution, the upper and lower bases are connected to the corresponding upper and lower finger-like elements by inserting slots. The main structures of the upper and lower bases can still be processed as a single unit, providing support for the upper and lower finger-like elements and ensuring structural strength. By increasing the number of slots or adjusting the spacing between the slots, the spacing between the upper and lower finger-like elements can be adjusted. This not only helps ensure the accuracy of the corrugated sheet processing, but also allows the forming elements (upper and lower finger-like elements) to be made thinner, reducing the contact area between the forming elements and the material, thereby reducing the probability of wear and damage.

[0013] Preferably, the upper base comprises a plurality of upper base elements, and the upper finger-shaped element is inserted between two adjacent upper base elements;

[0014] And / or, the lower base includes a plurality of lower base elements, and the lower finger-shaped element is inserted between two adjacent lower base elements.

[0015] In this solution, the upper base is decomposed into several upper base components, and the upper finger-like components are inserted between two adjacent upper base components, which is another form of upper finger-like connection. Alternatively, the lower base is decomposed into several lower base components, and the lower finger-like components are inserted between two adjacent lower base components, which is another form of lower finger-like connection. With this arrangement, the upper and lower tool assemblies form a combined structure that is interconnected, further simplifying the structure and making each component easy to process, replace, and maintain. It also makes it easier to adjust the spacing between the finger-like components and replace finger-like components of different sizes. This not only helps ensure the accuracy of corrugated sheet processing, but also allows the forming components (upper and lower finger-like components) to be made thinner, reducing the contact area between the forming components and the material, thereby reducing the probability of wear and damage.

[0016] Preferably, a gasket is interposed between the upper finger-shaped element and the upper base element; and / or a gasket is interposed between the lower finger-shaped element and the lower base element.

[0017] In this solution, the spacing between the upper finger elements can be adjusted by inserting a spacer between the upper finger elements and the upper base element, and the spacing between the lower finger elements can be adjusted by inserting a spacer between the lower finger elements and the lower base element.

[0018] Preferably, the upper finger-shaped elements are arranged at equal intervals along the feeding direction, and the lower finger-shaped elements are arranged at equal intervals along the feeding direction;

[0019] The distance between the opposing surfaces of the upper finger-shaped element and the adjacent lower finger-shaped element along the feeding direction is A, the center distance between two adjacent upper finger-shaped elements is B, and the ratio of A to B is not less than 30% and not more than 40%.

[0020] In this solution, the above arrangement is adopted, so that the molding space between the upper finger-shaped elements and the lower finger-shaped elements can be increased by reducing the structure of the upper finger-shaped elements and the lower finger-shaped elements, thereby ensuring the processing accuracy of the corrugated sheet.

[0021] Preferably, the upper finger-shaped element and the lower finger-shaped element both include straight segments distributed along the extension direction and curved segments extending from both ends of the straight segments; the straight segment of at least one of the upper finger-shaped element and the lower finger-shaped element is provided with a plurality of heat dissipation slots.

[0022] In this solution, the heat dissipation slots dissipate heat generated during the forming process from the upper and lower finger elements, preventing deformation and potentially impacting their service life. They also prevent metal dust from adhering to the upper and lower finger elements during processing, which could affect processing efficiency. The straight section, the middle section, is the primary forming area and where the most heat is generated. Distributing the heat dissipation slots along this straight section improves heat dissipation efficiency.

[0023] Preferably, the upper finger-shaped element and the lower finger-shaped element each include a forming surface for stamping, and an insertion end inserted into the upper base and the lower base;

[0024] The heat dissipation groove is a groove extending from the molding surface toward the insertion end.

[0025] In this solution, the heat dissipation slot adopts the above-mentioned type of slot, which has a simple structure and is easy to control the slot size. It can dissipate heat without causing deformation.

[0026] Preferably, the upper finger-shaped element and the lower finger-shaped element each include a forming surface for stamping, and an insertion end inserted into the upper base and the lower base;

[0027] The upper finger element and / or the lower finger element are provided with protrusions protruding along the extension direction at the ends in the extension direction and at the insertion ends. The protrusions are used to engage with the frame of the sheet forming tool to limit the movement of the finger elements.

[0028] In this solution, the protrusions are clamped with the frame of the sheet forming tool, and the forming elements (upper finger-like elements and lower finger-like elements) are plugged into the fixing elements (upper base and lower base), thereby further strengthening the fixing effect and avoiding loosening that affects the processing accuracy.

[0029] Preferably, the plurality of upper finger-shaped elements and the upper base element are provided with corresponding connecting holes, and the connecting holes are used to pass connecting rods to connect and fix the upper finger-shaped elements and the upper base element in series;

[0030] And / or, the plurality of lower finger-shaped elements and the lower base element are provided with corresponding connecting holes, and the connecting holes are used to pass connecting rods to connect and fix the lower finger-shaped elements and the lower base element in series.

[0031] In this solution, the upper tool assembly and / or the lower tool assembly connect and fix the forming element and the fixing element in series through the corresponding connecting holes and the connecting rod, thereby achieving assembly and ensuring connection strength.

[0032] Preferably, the upper finger-shaped element and the lower finger-shaped element have a stamped surface, and the stamped surface is provided with a wear-resistant coating.

[0033] In this solution, the above arrangement is adopted to improve the wear resistance of the molding surface of the finger-shaped element.

[0034] Preferably, the wear-resistant coating is a diamond-like carbon-based coating.

[0035] In this solution, a diamond-like carbon-based coating is used to further improve the wear resistance of the molding surface.

[0036] The present invention provides a positive and advantageous advantage: the sheet forming tool utilizes upper and lower finger-like elements arranged in an alternating, opposing arrangement. When these elements move relative to each other, they punch out wave peaks and troughs in the sheet material, forming a corrugated sheet. The upper and lower finger-like elements are removably connected to the upper and lower bases, respectively, by inserting them. This allows for the separate manufacturing of wear-prone forming elements from the fixed elements (i.e., the upper and lower bases), facilitating replacement of these elements. If one of the finger-like elements becomes damaged, only the damaged one needs to be removed and replaced, without replacing the entire sheet forming tool. This shortens replacement time, improves production efficiency, and reduces replacement costs. Furthermore, the upper base utilizes the aforementioned arrangement, with its inner wall extending to both ends of the upper finger-like elements and abutting against the sidewalls of the upper finger-like elements. This means that the entire sidewalls of the upper finger-like elements are clamped within the upper base, ensuring that the structural stability of the entire sheet forming tool is not compromised by the removable forming elements. At the same time, since the forming element is detachable, the forming element can adopt a finger-like structure with a relatively regular shape, which simplifies the matching structure with the upper and lower bases, thereby avoiding stress concentration and reducing the probability of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the structure of a sheet forming tool embodiment of the present invention.

[0038] Figure 2 Schematic diagram of the structure of the lower tool assembly of the sheet forming tool embodiment of the present invention.

[0039] Figure 3 Schematic diagram of the finger spacing of an embodiment of a sheet forming tool of the present invention.

[0040] Figure 4 Schematic diagram of the structure of the lower finger element of the sheet forming tool embodiment of the present invention.

[0041] Figure 5 This is a schematic structural diagram of a corrugated sheet formed by punching according to an embodiment of the sheet forming tool of the present invention.

[0042] Description of reference numerals:

[0043] Sheet forming tools1

[0044] Upper tool assembly 2

[0045] Upper base 21

[0046] Upper base member 210

[0047] Upper finger element 22

[0048] The portion 221 of the upper finger element clamped by the upper base

[0049] The upper finger-like element exposes the portion 222 of the upper base

[0050] Lower tool assembly 3

[0051] Lower base 31

[0052] Lower base member 310

[0053] Lower finger element 32

[0054] The portion 321 of the lower finger-like element clamped by the lower base

[0055] The portion 322 of the lower finger-like element exposed from the lower base

[0056] Mold frame 4

[0057] Inner wall surface 5

[0058] Heat sink 6

[0059] Line segment 7

[0060] Bend section 8

[0061] Molding surface 9

[0062] Insertion end 10

[0063] protrusion 11

[0064] Connection hole 12

[0065] Connecting rod 13

[0066] Bolt 14

[0067] Corrugated sheet 100

[0068] Peak 110

[0069] Trough 120

[0070] Feed direction C DETAILED DESCRIPTION

[0071] A preferred embodiment is given below and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0072] This embodiment provides a sheet forming tool 1 for manufacturing a corrugated sheet 100. The corrugated sheet 100 is used as a layer of structured packing and is installed in a packing tower in the chemical industry. The corrugated sheet 100 mainly plays the role of supporting the packing, optimizing fluid distribution, and enhancing mass transfer efficiency in the packing tower.

[0073] like Figure 1 As shown, combined with Figure 3 and Figure 4 The sheet forming tool 1 includes an upper tool assembly 2 and a lower tool assembly 3. The upper tool assembly 2 includes an upper base 21 and several upper finger-like elements 22. The lower tool assembly 3 includes a lower base 31 and several lower finger-like elements 32. Each upper finger-like element 22 and each lower finger-like element 32 extends along a feed direction C perpendicular to the corrugated sheet 100 being transferred.

[0074] Several upper finger-like elements 22 are inserted into the upper base 21 at intervals along the feeding direction C, and several lower finger-like elements 32 are inserted into the lower base 31 at intervals along the feeding direction C. The upper finger-like elements 22 and the lower finger-like elements 32 are arranged oppositely and alternately for punching sheet materials to form corrugations of the corrugated sheet 100.

[0075] The inner wall surface 5 of the upper base 21 for inserting the upper finger-shaped element 22 extends to both ends of the upper finger-shaped element 22 perpendicular to the feeding direction C, and abuts against the side wall of the upper finger-shaped element 22; the inner wall surface 5 of the lower base 31 for inserting the lower finger-shaped element 32 extends to both ends of the lower finger-shaped element 32 perpendicular to the feeding direction C, and abuts against the side wall of the lower finger-shaped element 32.

[0076] Specifically, in this embodiment, the various components of the sheet forming tool 1 are made of metal. The upper finger-shaped element 22 and the lower finger-shaped element 32 are stamped forming elements, also known as punches. Their main bodies have a consistent appearance, with their top surfaces machined into an arc-shaped structure that conforms to the corrugation dimensions. The upper base 21 and the lower base 31 serve as mounting bodies for the upper and lower finger-shaped elements 22 and 32. Based on the required dimensions of the corrugated sheet 100 to be formed, upper and lower finger-shaped elements 22 and 32 of appropriate specifications are selected and inserted onto the upper and lower bases 21 and 31 at a predetermined spacing. During insertion, the lower finger-shaped element 32 is typically positioned directly between two adjacent upper finger-shaped elements 22, or more specifically, between two adjacent lower finger-shaped elements 32. However, to account for manufacturing tolerances or desired forming effects, the position of the lower finger-shaped element 32 between two adjacent upper finger-shaped elements 22 does not necessarily need to be exactly in the middle; a certain deviation is permitted. In order to better stabilize the finger-like elements, the upper base 21 and the lower base 31 extend in the depth direction (i.e., perpendicular to the feeding direction C), so that their surfaces abut against the side walls into which the upper finger-like elements 22 and the lower finger-like elements 32 are inserted, respectively tightly clamping the upper finger-like elements 22 and the lower finger-like elements 32. That is, the upper finger-like element 22 includes a portion 221 clamped by the upper base and a portion 222 exposed from the upper base, and the lower finger-like element 32 includes a portion 321 clamped by the lower base and a portion 322 exposed from the lower base. Figure 4 The hatched portion shows the surface of the portion 321 of the lower finger element clamped by the lower base extending in the depth direction (i.e. perpendicular to the feed direction C), and the lower base 31 extends in the depth direction to the two ends of the lower finger element 32 in the depth direction (i.e. Figure 4 The two protrusions 11 are located at the end thereof), so that its two inner wall surfaces 5 and the entire outer wall surface of the portion 321 of the lower finger-like element clamped by the lower base (ie Figure 4 The upper finger element 22 is abutted against the lower base (with hatched sections) to clamp it. Similarly, the portion 221 of the upper finger element clamped by the upper base also extends in the depth direction. The upper base 21 extends in the depth direction to the two ends of the upper finger element 22 in the depth direction, so that its two inner wall surfaces 5 abut against the entire outer wall surface of the portion 221 of the upper finger element clamped by the lower base, clamping the upper finger element 22. This prevents the finger element from loosening and affecting the molding quality. The assembled finger element and base are placed in a mold frame 4 and fixed to form the upper tool assembly 2 and the lower tool assembly 3. The upper tool assembly 2 and the lower tool assembly 3 are then installed on the stamping equipment.

[0077] The corrugated sheet 100 is a whole flat stainless steel plate before forming. During forming, the stainless steel plate is delivered between the upper finger element 22 and the lower finger element 32 and is gradually delivered along the feeding direction C. When the stamping equipment is started, the upper tool assembly 2 and the lower tool assembly 3 move relative to each other, and the upper finger element 22 and the lower finger element 32 stamp the stainless steel plate. Figure 5 As shown, the upwardly punched portion of the lower finger-shaped element 32 forms a wave crest 110 , and the downwardly punched portion of the upper finger-shaped element 22 forms a wave trough 120 , thereby forming a whole undulating corrugated sheet 100 .

[0078] In the structure of the sheet forming tool 1, the upper finger-like element 22 and the lower finger-like element 32 serve as forming elements that cooperate with each other. The sheet forming tool 1 is arranged relative to and alternately by the upper finger-like element 22 and the lower finger-like element 32. When the upper finger-like element 22 and the lower finger-like element 32 move relative to each other, the sheet material is punched out into wave crests 110 and wave troughs 120 to form a corrugated sheet 100. The upper finger-like element 22 and the lower finger-like element 32 are respectively connected to the upper base 21 and the lower base 31 in an inserted manner to form a detachable connection. The forming element that is susceptible to wear can be manufactured separately from the fixed element (i.e., the upper base 21 and the lower base 31), which facilitates the replacement of the forming element. When one of the finger-like elements is damaged, it is only necessary to remove the damaged finger-like element and replace it without replacing the entire sheet forming tool 1, thereby shortening the replacement time, improving production efficiency, and saving replacement costs. On this basis, the upper base 21 adopts the above-mentioned arrangement to extend its inner wall surface 5 to both ends of the upper finger-like element 22 (i.e., Figure 4 The upper finger-shaped element 22 is abutted against the sidewall of the upper finger-shaped element 22, thereby sandwiching the entire sidewall of the upper finger-shaped element 22 within the upper base 21. This ensures that the structural stability of the entire sheet forming tool 1 is not compromised by the detachable forming element. Furthermore, since the forming element is detachable, it can adopt a more regularly shaped finger-shaped structure, simplifying its coordination with the upper and lower bases 31, thereby avoiding stress concentration and reducing the probability of damage.

[0079] Among them, such as Figure 3As shown, the upper base 21 comprises several upper base elements 210, each made of a relatively thick steel plate. The upper finger-like elements 22 are inserted between two adjacent upper base elements 210. The lower base 31 comprises several lower base elements 310, also made of a relatively thick steel plate. The lower finger-like elements 32 are inserted between two adjacent lower base elements 310. Decomposing the upper base 21 into several upper base elements 210 and inserting the upper finger-like elements 22 between two adjacent upper base elements 210 is one form of plug-in connection for the upper finger-like elements 22. Decomposing the lower base 31 into several lower base elements 310 and inserting the lower finger-like elements 32 between two adjacent lower base elements 310 is another form of plug-in connection for the lower finger-like elements 32. With this arrangement, the upper tool assembly 2 and the lower tool assembly 3 form a combined structure that is spliced ​​together, further simplifying the structure and making each component easy to process, replace, and maintain. It is also easier to adjust the spacing between the finger elements and replace finger elements of different sizes. This is beneficial to ensuring the processing accuracy of the corrugated sheet 100 on the one hand, and on the other hand, the forming elements (upper finger elements 22 and lower finger elements 32) can be made thinner, reducing the contact area between the forming elements and the material, thereby reducing the probability of wear and damage.

[0080] Of course, the method of inserting and mounting the upper finger-like elements 22 and the lower finger-like elements 32 is not limited to that of this embodiment. In other embodiments, the upper base 21 and the lower base 31 can also be processed as a whole, rather than being divided into several base elements as in this embodiment. Specifically, the upper base 21 is provided with several slots that match the upper finger-like elements 22. The slots are spaced apart on the main structure of the upper base 21. The shape of the slots can be designed based on the outer shape of the finger-like elements to achieve a tighter fit. Similarly, the lower base 31 can also be provided with several slots that match the lower finger-like elements 32. The distribution and shape of the slots are similar to those of the slots of the upper base 21.

[0081] In this structural approach, the upper base 21 and lower base 31 are connected to the corresponding upper finger-like elements 22 and lower finger-like elements 32 by inserting slots. The main structures of the upper base 21 and lower base 31 can still be processed as a single unit, providing support for the upper finger-like elements 22 and lower finger-like elements 32, ensuring structural strength. By increasing the number of slots or adjusting the spacing between the slots, the spacing between the upper finger-like elements 22 and the lower finger-like elements 32 can be adjusted. This not only helps ensure the machining accuracy of the corrugated sheet 100, but also allows the forming elements (upper finger-like elements 22 and lower finger-like elements 32) to be made thinner, reducing the contact area between the forming elements and the material, thereby reducing the probability of wear and damage.

[0082] In other embodiments, in order to better adjust the spacing between the forming elements, a gasket may be inserted between the upper finger-shaped elements 22 and the upper base element 210, so that the spacing between the upper finger-shaped elements 22 can be adjusted.

[0083] Similarly, a gasket may be inserted between the lower finger-shaped elements 32 and the lower base element 310 so that the spacing between the lower finger-shaped elements 32 can be adjusted.

[0084] like Figure 3 As shown, in this embodiment, the upper finger elements 22 and the lower finger elements 32 are arranged at equal intervals. The distance between the opposing surfaces of an upper finger element 22 and an adjacent lower finger element 32 along the feed direction C is A, and the center distance between two adjacent upper finger elements 22 is B. The ratio of A to B is not less than 30% and not greater than 40%, that is, 30% ≤ A / B ≤ 40%. This ratio arrangement increases the molding space between the upper finger elements 22 and the lower finger elements 32 by reducing the structure of the upper finger elements 22 and the lower finger elements 32, thereby ensuring the processing accuracy of the corrugated sheet 100.

[0085] like Figure 4 As shown, both the upper finger-like elements 22 and the lower finger-like elements 32 include straight segments 7 extending along the extension direction C and curved segments 8 extending from the ends of the straight segments 7. Several heat dissipation slots 6 are defined in the straight segments 7 of the upper and lower finger-like elements 22 and 32. These heat dissipation slots 6 dissipate heat generated during the forming process, preventing deformation and thus reducing service life. They also prevent metal dust from adhering to the upper and lower finger-like elements 22 and 32 during processing, which could affect processing efficiency. The straight segment 7 is the middle segment, the primary forming zone and where the majority of heat is generated. Distributing the heat dissipation slots 6 throughout the straight segment 7 improves heat dissipation efficiency.

[0086] In other embodiments, depending on the actual heating conditions of the upper finger-shaped element 22 and the lower finger-shaped element 32, the heat dissipation slot 6 may be provided on only one of the finger-shaped elements, while the other finger-shaped element may not be provided with a heat dissipation slot 6, so as to ensure structural integrity and obtain better structural strength.

[0087] Among them, such as Figure 4 As shown, the lower finger-shaped element 32 includes a forming surface 9 for stamping and an insertion end 10 inserted into the lower base 31. The structure of the upper finger-shaped element 22 is similar to that of the lower finger-shaped element 32. The heat dissipation slot 6 is a slot extending from the forming surface 9 to the insertion end 10. The heat dissipation slot 6 adopts the above-mentioned slotting method, which is simple in structure and easy to control the slot size. It can dissipate heat without causing deformation.

[0088] Among them, such as Figure 4 As shown, the lower finger-like element 32 has a protrusion 11 extending in the same direction at its end and at its insertion end 10. This protrusion 11 engages with the frame of the sheet forming tool 1 to restrict movement of the finger-like element. The upper finger-like element 22 has a similar structure to the lower finger-like element 32. The engagement of the protrusion 11 with the frame of the sheet forming tool 1 further strengthens the securement of the forming elements (upper and lower finger-like elements 22 and 32) between the fixing elements (upper and lower bases 21 and 31), preventing loosening that could affect machining accuracy.

[0089] Among them, such as Figure 2 and Figure 4 As shown, several upper finger-like elements 22 and upper base element 210 are provided with corresponding connecting holes 12. These holes 12 are used to pass connecting rods 13 through them to connect and secure the upper finger-like elements 22 and upper base element 210. The connecting rod 13 is a threaded rod with a smooth middle section and threaded ends. After passing through each connecting hole 12, the threaded ends are tightened and secured with bolts 14. Similarly, several lower finger-like elements 32 and lower base element 310 are provided with corresponding connecting holes 12. These holes 12 are used to pass connecting rods 13 through them to connect and secure the lower finger-like elements 32 and lower base element 310. The upper tool assembly 2 and / or lower tool assembly 3 connect and secure the forming elements and fixing elements through the corresponding connecting holes 12 and connecting rods 13, achieving assembly and ensuring connection strength.

[0090] In this embodiment, the upper finger-shaped element 22 and the lower finger-shaped element 32 are configured to be heat-treated, and the stamped surfaces of the upper finger-shaped element 22 and the lower finger-shaped element 32 are provided with a wear-resistant coating. This treatment method can improve the strength of the finger-shaped elements and the wear resistance of the molded surface.

[0091] Specifically, the wear-resistant coating in this embodiment is a diamond-like carbon (DLC)-based coating. DLC is a preferred coating material, more effectively improving the wear resistance of the molded surface than other materials.

[0092] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A sheet forming tool for manufacturing a corrugated sheet, the sheet forming tool comprising an upper tool assembly and a lower tool assembly, the upper tool assembly comprising an upper base and a plurality of upper finger elements, the lower tool assembly comprising a lower base and a plurality of lower finger elements, each of the upper finger elements and each of the lower finger elements extending perpendicular to a feed direction in which the corrugated sheet is conveyed, characterized in that: The plurality of upper finger-shaped elements are inserted into the upper base at intervals along the feeding direction, and the plurality of lower finger-shaped elements are inserted into the lower base at intervals along the feeding direction. The upper finger-shaped elements and the lower finger-shaped elements are arranged oppositely and alternately, and are used to punch the sheet material to form the corrugations of the corrugated sheet; The inner wall surface of the upper base for inserting the upper finger-like element extends to both ends of the upper finger-like element perpendicular to the feeding direction and abuts against the side walls of the upper finger-like element; the inner wall surface of the lower base for inserting the lower finger-like element extends to both ends of the lower finger-like element perpendicular to the feeding direction and abuts against the side walls of the lower finger-like element.

2. The sheet forming tool according to claim 1, wherein: The upper base is provided with a plurality of slots cooperating with the upper finger-shaped elements; and / or the lower base is provided with a plurality of slots cooperating with the lower finger-shaped elements.

3. The sheet forming tool according to claim 1, wherein: The upper base includes a plurality of upper base elements, and the upper finger-shaped element is inserted between two adjacent upper base elements; And / or, the lower base includes a plurality of lower base elements, and the lower finger-shaped element is inserted between two adjacent lower base elements.

4. The sheet forming tool according to claim 3, wherein: A gasket is further interposed between the upper finger-shaped element and the upper base element; and / or a gasket is further interposed between the lower finger-shaped element and the lower base element.

5. The sheet forming tool according to claim 1, wherein: The upper finger elements are arranged at equal intervals along the feeding direction, and the lower finger elements are arranged at equal intervals along the feeding direction; The distance between the opposing surfaces of the upper finger-shaped element and the adjacent lower finger-shaped element along the feeding direction is A, the center distance between two adjacent upper finger-shaped elements is B, and the ratio of A to B is not less than 30% and not more than 40%.

6. The sheet forming tool according to claim 1, wherein: The upper finger-shaped element and the lower finger-shaped element both include straight segments distributed along the extension direction and curved segments extending from both ends of the straight segments; the straight segment of at least one of the upper finger-shaped element and the lower finger-shaped element is provided with a plurality of heat dissipation slots.

7. The sheet forming tool according to claim 6, wherein: The upper finger-shaped element and the lower finger-shaped element each include a forming surface for stamping, and an insertion end inserted into the upper base and the lower base; The heat dissipation groove is a groove extending from the molding surface toward the insertion end.

8. The sheet forming tool according to claim 1, wherein: The upper finger-shaped element and the lower finger-shaped element each include a forming surface for stamping, and an insertion end inserted into the upper base and the lower base; The upper finger element and / or the lower finger element are provided with protrusions protruding along the extension direction at the ends in the extension direction and at the insertion ends. The protrusions are used to engage with the frame of the sheet forming tool to limit the movement of the finger elements.

9. The sheet forming tool according to claim 3, wherein: The plurality of upper finger-shaped elements and the upper base element are provided with corresponding connecting holes, and the connecting holes are used to pass connecting rods to connect and fix the upper finger-shaped elements and the upper base element in series; And / or, the plurality of lower finger-shaped elements and the lower base element are provided with corresponding connecting holes, and the connecting holes are used to pass connecting rods to connect and fix the lower finger-shaped elements and the lower base element in series.

10. The sheet forming tool according to claim 1, wherein: The upper finger-shaped element and the lower finger-shaped element have a stamped surface, and the stamped surface is provided with a wear-resistant coating, and the wear-resistant coating is a diamond-like carbon-based coating.

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