A micro-texture blank holder with rounded corner area for reducing friction and increasing lubrication

Abstract

The utility model provides a microtexture edge ring of rounding area antifriction and wetting, relates to edge ring technical field, including lower mould, the top of lower mould is equipped with edge ring main part, the top surface of edge ring main part is equipped with the slot, the top of slot is equipped with calendering rib, the bottom surface of calendering rib is equipped with the insert block, the both ends surface of insert block and the both sides inner wall of both ends of slot are all horizontal array and are equipped with the pin hole, adopt and install in place after reverse rotation knob, make screw rod reverse rotation to drive sliding block to retreat to the inside position of sliding slot. Sliding block moving process, fixed pin rethread into the pin hole of insert block and slot and clamping tightly, realize the relocking and fixed of calendering rib. The whole replacement process does not need to disassemble edge ring main part or reprocess top surface, only through knob rotation can complete the quick dismounting operation of calendering rib. The microtexture of calendering rib on the top surface of edge ring has solved once wearing, needs integral replacement or reprocesses edge ring, and the shortcoming that the maintenance cost is high.

Description

Technical Field

[0001] This utility model relates to the field of edge pressing ring technology, and in particular to a micro-textured edge pressing ring with rounded corners that reduces friction and increases lubrication. Background Technology

[0002] The blank holder is a crucial component in stamping dies used to control the flow and extension of sheet metal during the forming process. Its function is to apply appropriate clamping force to the edges of the sheet metal to prevent wrinkling and regulate the metal flow rate. The surface condition and geometry of the blank holder directly affect the friction characteristics and the stability of the lubricating film during forming, making them key factors in ensuring forming quality and die life. In traditional stamping processes, the blank holder typically employs an integral structure with a smooth or polished metal surface. When the sheet metal slides between the blank holder and the die, the contact surface experiences significant friction, and the lubricating film is easily broken, especially in the rounded corner transition area. Due to stress concentration and significant differences in relative sliding speed, problems such as scratches, lubrication failure, or material adhesion are prone to occur, leading to a decline in the surface quality of the part. To improve this issue, some studies have proposed setting micro-textured structures on the surface of the blank holder, utilizing the texture to form micro-oil reservoirs on the contact surface to achieve friction reduction and enhanced lubrication.

[0003] However, existing micro-textured blank holders still exist. Once the micro-texture of the calendering rib on the top surface of the blank holder is worn, the entire blank holder needs to be replaced or reprocessed, resulting in high maintenance costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the prior art, once the micro-texture of the rolling rib on the top surface of the pressure ring is worn, the entire pressure ring needs to be replaced or reprocessed, resulting in high maintenance costs. Therefore, this invention proposes a micro-textured pressure ring with rounded corner areas to reduce friction and increase lubrication.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a micro-textured edge ring with rounded corners for reducing friction and increasing lubrication, comprising a lower mold, an edge ring body on the top of the lower mold, a slot on the top surface of the edge ring body, a rolling rib on the top of the slot, an insert on the bottom surface of the rolling rib, pin holes arranged horizontally on both ends of the insert and on both sides of the inner wall of the slot, sliding grooves on both sides of the edge ring body, limiting grooves at both ends of the two sliding grooves, sliders inside the two sliding grooves, sleeves on the side of the two sliders near the slot, rotating shafts inside the two sleeves, screws on the side of the rotating shafts near the sliders, knobs at the ends of the two screws, fixing pins arranged horizontally on the surface of the two sliders, and limiting blocks on both sides of the two sliders.

[0006] Preferably, the pressing ring body is mounted on the top surface of the lower mold, and the pressing ring body is bolted to the lower mold. The sliding grooves on both sides of the pressing ring body are mirror images of the pressing ring body.

[0007] Preferably, the two sliding grooves and the limiting grooves on both sides of the sliding grooves are integrally formed, the two sliders and the limiting blocks on both sides of the sliders are integrally formed, the limiting grooves and the limiting blocks are both V-shaped, the two sliders are installed in the sliding grooves, and the limiting blocks on both sides of the sliders are installed in the limiting grooves.

[0008] Preferably, the rolled bead and the insert block on the bottom surface of the rolled bead are integrally formed, and the insert block is installed in the slot. The pin holes horizontally set on the surface of both ends of the insert block and the pin holes horizontally set on the inner walls of both ends of the slot are positioned one-to-one, and the pin holes on the inner wall surface of both ends of the slot are connected to the sliding grooves on the two sides of the main body of the pressing ring.

[0009] Preferably, both sleeves are positioned in the middle of the two slide grooves, and both sleeves are bolted to the inner wall of the slide grooves. Both rotating shafts are fixed in the slide grooves by means of the sleeves.

[0010] Preferably, the fixing pins horizontally set on the surfaces of the two sliders are integrally formed with the sliders, and the positions of the fixing pins correspond one-to-one with the positions of the pin holes on the surfaces of the inserts and slots. The fixing pins on the surfaces of the two sliders are inserted into the pin holes on the surfaces of the inserts and slots, and the bottom inserts of the rolled ribs are fixed in the slots by the fixing pins.

[0011] Preferably, both of the rotating shafts are installed inside the two sleeves, the two screws are integrally formed with the two rotating shafts, and one end of each screw passes through the sleeve and the slider and extends out of the groove. Both of the knobs are installed at the ends of the screws and are bolted to the screws.

[0012] Beneficial effects In this invention, when the calender needs to be replaced, the operator rotates the knobs on both sides of the pressure ring body, causing the knobs to drive the screw to rotate forward. This causes the slider to move outward through the threaded engagement with the screw, disengaging the fixing pin on the slider surface from the corresponding pin hole of the locking block and slot. After the fixing pin is completely disengaged, the lock between the bottom insert of the calender and the slot is released, allowing the calender to be pulled upward. At this point, the worn calender can be removed and replaced with a new calender with a micro-textured structure. When installing the new calender, its bottom insert is inserted into the slot on the top surface of the pressure ring body. After insertion, the knob is rotated in the opposite direction, causing the screw to rotate in the opposite direction, thereby driving the slider back to the position inside the slot. During the slider's movement, the fixing pin re-enters the pin hole of the insert and slot and locks in place, achieving re-locking and fixing of the calender. The entire replacement process does not require disassembling the pressure ring body or re-machining the top surface; the calender can be quickly installed and removed simply by rotating the knob. This invention solves the problem that once the micro-texture of the calendering rib on the top surface of the blank holder is worn, the entire blank holder needs to be replaced or reprocessed, resulting in high maintenance costs. Attached Figure Description

[0013] Figure 1 This is an isometric drawing of the present invention; Figure 2 This is a partial isometric drawing of the present invention; Figure 3 This is a front view of the present invention; Figure 4 For the present utility model Figure 3 Sectional view at point AA; Figure 5 For the present utility model Figure 3 Sectional view at BB; Figure 6 For the present utility model Figure 4 Enlarged view of point A.

[0014] Legend: 1. Lower mold; 2. Pressure ring body; 3. Slide groove; 4. Limiting groove; 5. Slot; 6. Pin hole; 7. Slider; 8. Limiting block; 9. Fixing pin; 10. Rolling bead; 11. Insert block; 12. Rotating shaft; 13. Screw; 14. Sleeve; 15. Knob. Detailed Implementation

[0015] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1: Reference Figure 1-6 A micro-textured edge banding with rounded corners for reduced friction and increased lubrication includes a lower mold 1. An edge banding body 2 is fixedly mounted on the top center of the lower mold 1. A slot 5 is formed on the top surface of the edge banding body 2. A rolling rib 10 is provided on the top of the slot 5. An insert block 11 is provided on the bottom surface of the rolling rib 10. Pin holes 6 are horizontally arranged on both ends of the insert block 11 and on the inner walls of both sides of the slot 5. Slide grooves 3 are provided on both sides of the edge banding body 2. Limiting grooves 4 are provided at both ends of the two slide grooves 3. A slider 7 is provided inside each of the two slide grooves 3. A sleeve 14 is provided on the side of each slider 7 closest to the slot 5. A rotating shaft 12 is provided inside each of the two sleeves 14. Furthermore, the rotating shaft 12 has screws 13 on the side surface near the slider 7, and each screw 13 has a knob 15 at its end. The surfaces of the two sliders 7 are horizontally arrayed with fixing pins 9, and the two sides of the sliders 7 have limiting blocks 8. The pressure ring body 2 is mounted on the top surface of the lower mold 1, and the pressure ring body 2 is bolted to the lower mold 1. The sliding grooves 3 on both sides of the pressure ring body 2 are mirror images of the pressure ring body 2. The two sliding grooves 3 and the limiting grooves 4 on both sides of the sliding grooves 3 are integrally formed. The two sliders 7 and the limiting blocks 8 on both sides of the sliders 7 are integrally formed. The limiting grooves 4 and the limiting blocks 8 are both V-shaped. The two sliders 7 are mounted on... In the slide groove 3, the limiting blocks 8 on both sides of the slider 7 are installed in the limiting groove 4. The rolling bead 10 and the insert block 11 on the bottom surface of the rolling bead 10 are integrally formed, and the insert block 11 is installed in the slot 5. The pin holes 6 horizontally set on the surface of both ends of the insert block 11 and the pin holes 6 horizontally set on the inner walls of both ends of the slot 5 are positioned one-to-one. The pin holes 6 on the inner wall surface of both ends of the slot 5 are connected to the slide groove 3 on both sides of the pressure ring body 2. The two sleeves 14 are both set in the middle of the two slide grooves 3, and the two sleeves 14 are bolted to the inner wall of the slide groove 3. The two rotating shafts 12 are both fixed in the slide groove 3 through the sleeves 14. The surface of the two sliders 7 is water The fixed pins 9 are integrally formed with the sliders 7, and the positions of the fixed pins 9 correspond one-to-one with the positions of the pin holes 6 on the surfaces of the inserts 11 and the slots 5. The fixed pins 9 on the surfaces of the two sliders 7 are inserted into the pin holes 6 on the surfaces of the inserts 11 and the slots 5. The inserts 11 on the bottom surface of the rolled rib 10 are fixed in the slots 5 by the fixed pins 9. The two rotating shafts 12 are installed inside the two sleeves 14. The two screws 13 are integrally formed with the two rotating shafts 12, and one end of the two screws 13 passes through the sleeves 14 and the sliders 7 and extends out of the grooves 3. The two knobs 15 are installed at the ends of the screws 13, and the knobs 15 are bolted to the screws 13.

[0018] The lower mold 1 serves as the overall mounting base, providing stable rigid support for the blank holder body 2, and is fixed by bolt connection. The blank holder body 2 is mounted on the top surface of the lower mold 1, serving as the functional load-bearing component of this innovative structure. Its top surface is provided with a slot 5 for inserting the insertion block 11 from the bottom surface of the rolled bead 10. The insertion block 11 and the slot 5 cooperate to ensure good radial positioning and force transmission capability of the rolled bead 10 during stress. Horizontal pin holes 6 are provided on both ends of the insertion block 11 and on the inner walls of both ends of the slot 5, for detachable pin-locking connection with the fixing pins 9 extending from the surface of the slider 7, thereby securely locking the rolled bead 10 in the slot 5 during assembly. The blank holder body 2 has symmetrically formed sliding grooves 3 on both sides, which are integrally formed with the limiting grooves 4 on both sides. The limiting grooves 4 cooperate with the limiting blocks 8 on both sides of the slider 7 to guide the movement of the slider 7 and prevent it from dislodging. A sleeve 14 is bolted to the middle of the slide groove 3. A rotating shaft 12 is installed inside the sleeve 14, and the rotating shaft 12 is integrally machined with the screw 13 to efficiently transmit rotational torque to the slider 7. The screw 13 passes through the sleeve 14 and engages with the internal threaded hole of the slider 7. A knob 15 is mounted on the outer end of the screw 13 and fixed with bolts. When the operator rotates the knob 15, the screw 13 rotates within the sleeve 14 and, through threaded transmission, drives the slider 7 to move smoothly axially within the slide groove 3. The linear motion of the slider 7 is precisely guided by the V-shaped engagement structure of the limiting block 8 and the limiting groove 4, ensuring smooth movement and high positional repeatability. Fixed pins 9, integrally formed on the surface of the slider 7, are arranged in a horizontal array and extend out of the slide groove 3 on the side of the slider 7 closest to the slot 5. Their positions strictly correspond to the pin holes 6 on the insert block 11 and the slot 5. When the fixed pins 9 are inserted into the pin holes 6, a reliable mechanical lock is formed, firmly fixing the rolled rib 10 in the slot 5. When unlocking is required, the operator rotates knob 15 to rotate screw 13 clockwise. The threaded engagement causes slider 7 to move outward along groove 3. As slider 7 moves outward, fixing pin 9 gradually disengages from the pin hole 6 between insert 11 and slot 5. After fixing pin 9 is completely disengaged, the locking state between insert 11 and slot 5 is released, and rolled bead 10 can be pulled upward for replacement. When replacing a new rolled bead 10, insert the new insert 11 along slot 5 to the positioning position, then rotate knob 15 in the opposite direction to rotate screw 13 in the opposite direction and drive slider 7 back to its original position. During slider 7's retraction, fixing pin 9 re-enters the pin hole 6 between insert 11 and slot 5 and completes the locking, restoring the original rigid fixed state.

[0019] The working surface of the rolling bead 10 is formed with micro-texture structures such as microgrooves, micro-pits, or directional micro-arrays through laser etching or precision die-cutting. These micro-textures form lubricant storage cavities when the rolling bead 10 contacts the sheet metal, maintaining a lubricating film through capillary action and surface tension, thus achieving controlled lubricant release. During sliding, the micro-textures also promote the establishment of local hydrodynamic pressure, forming a stable oil film on the contact surface, reducing the direct contact area between metals, thereby lowering the coefficient of friction and wear rate. Furthermore, the microcavities between the textures effectively trap wear debris and microparticles, preventing them from embedding in the contact surface and causing scratches, thus achieving continuous friction reduction and lubrication. Specific Implementation Example 2: Reference Figure 1-6 A micro-textured edge banding with rounded corners for reduced friction and increased lubrication is further based on the basic structure in Specific Embodiment 1. In actual operation, the operator first confirms that the micro-texture on the surface of the calender 10 to be replaced is worn. Then, the operator manually rotates the knobs 15 on both sides of the edge banding body 2, causing the screw 13 to drive the slider 7 to move outward along the groove 3, and the fixing pin 9 gradually exits the pin hole 6 and is unlocked. At this time, the operator manually pulls out the calender 10 vertically, checks the inside of the slot 5 for cleanliness, and inserts the new calender 10 with micro-texture into the slot 5. Then, the knob 15 is rotated in the opposite direction to return the slider 7 to its initial position, and the fixing pin 9 is reinserted into the pin hole 6 for reliable locking. After replacement, the operator needs to check whether the coaxiality of the calender 10 installation is consistent with the top surface height and add lubricant as needed. After confirming that there are no abnormalities, normal forming operations can be resumed. The entire process does not require disassembling the main body 2 of the pressure ring, nor does it require reprocessing the top surface. It can quickly replace the micro-texture on the surface of the calender 10 and restore its function, which significantly reduces maintenance costs and improves equipment efficiency.

[0021] In summary: 1. When it is necessary to replace the rolled bead 10, the operator rotates the knobs 15 on both sides of the pressure ring body 2, causing the knobs 15 to drive the screw 13 to rotate in the forward direction. This causes the slider 7 to move outward from the groove 3 through the threaded engagement with the screw 13, causing the fixing pin 9 on the surface of the slider 7 to disengage from the corresponding pin hole 6 in the slot 5. After the fixing pin 9 is completely disengaged, the lock between the bottom insert 11 of the rolled bead 10 and the slot 5 is released, allowing the rolled bead 10 to be pulled upward. At this time, the worn rolled bead 10 can be removed and replaced with a new rolled bead 10 with a micro-textured structure. When installing the new rolled bead 10, insert its bottom insert 11 into the slot 5 on the top surface of the pressure ring body 2. After it is inserted into place, rotate the knob 15 in the reverse direction, causing the screw 13 to rotate in the reverse direction, thereby driving the slider 7 to retract to the position inside the groove 3. During the movement of slider 7, fixing pin 9 re-enters and locks into pin holes 6 of insert block 11 and slot 5, thereby re-locking and fixing the calender 10. The entire replacement process does not require disassembling the pressure ring body 2 or re-machining the top surface; the calender 10 can be quickly disassembled and assembled simply by rotating knob 15. This solves the problem of high maintenance costs caused by the need to replace or re-machin the entire pressure ring once the micro-texture of the calender 10 on the top surface of the pressure ring is worn.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A micro-textured edge ring with rounded corners for reduced friction and increased lubrication, comprising a lower mold (1), characterized in that: The lower mold (1) has a pressure ring body (2) fixedly installed at the top center. The pressure ring body (2) has a slot (5) on its top surface. The top of the slot (5) has a rolling rib (10). The bottom surface of the rolling rib (10) has an insert (11). The two ends of the insert (11) and the inner walls of both sides of the slot (5) are horizontally arrayed with pin holes (6). The two sides of the pressure ring body (2) are provided with sliding grooves (3). The two ends of the two sliding grooves (3) are provided with limiting grooves (4). Both of the two slides (3) are provided with sliders (7) inside, and both sliders (7) are provided with sleeves (14) on the side near the slot (5). Both sleeves (14) are provided with shafts (12) inside, and both shafts (12) are provided with screws (13) on the side near the sliders (7). Both screws (13) are provided with knobs (15) at their ends. Both sliders (7) are provided with fixing pins (9) arranged in a horizontal array on their surfaces. Both sides of both sliders (7) are provided with limiting blocks (8).

2. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: The pressing ring body (2) is mounted on the top surface of the lower mold (1), and the pressing ring body (2) is bolted to the lower mold (1). The sliding grooves (3) on both sides of the pressing ring body (2) are mirrored with the pressing ring body (2) as the center.

3. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: The two slide grooves (3) and the limiting grooves (4) on both sides of the slide grooves (3) are integrally formed. The two sliders (7) and the limiting blocks (8) on both sides of the sliders (7) are integrally formed. The limiting grooves (4) and the limiting blocks (8) are both V-shaped. The two sliders (7) are installed in the slide grooves (3), and the limiting blocks (8) on both sides of the sliders (7) are installed in the limiting grooves (4).

4. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: The rolled rib (10) and the insert (11) on the bottom surface of the rolled rib (10) are integrally formed, and the insert (11) is installed in the slot (5). The pin holes (6) horizontally set on the two ends of the insert (11) and the pin holes (6) horizontally set on the inner walls of both ends of the slot (5) are in a one-to-one correspondence. The pin holes (6) on the inner wall surface of both ends of the slot (5) are connected to the sliding grooves (3) on both sides of the pressure ring body (2).

5. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: Both sleeves (14) are located in the middle of the two slides (3), and both sleeves (14) are bolted to the inner wall of the slide (3). Both shafts (12) are fixed in the slide (3) through the sleeves (14).

6. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: The fixing pins (9) horizontally set on the surfaces of the two sliders (7) are integrally formed with the sliders (7), and the positions of the fixing pins (9) correspond one-to-one with the positions of the pin holes (6) on the surfaces of the insert (11) and the slot (5). The fixing pins (9) on the surfaces of the two sliders (7) are inserted into the pin holes (6) on the surfaces of the insert (11) and the slot (5). The bottom insert (11) of the rolled rib (10) is fixed in the slot (5) by the fixing pins (9).

7. The micro-textured edge ring with rounded corner area friction reduction and lubrication as described in claim 1, characterized in that: Both of the two rotating shafts (12) are installed inside the two sleeves (14). The two screws (13) are integrally formed with the two rotating shafts (12), and one end of each screw (13) passes through the sleeve (14) and the slider (7) and extends out of the groove (3). Both of the two knobs (15) are installed at the end of the screws (13), and the knobs (15) are bolted to the screws (13).

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