A quick die change mechanism for a modular head forming apparatus

Abstract

The application discloses a kind of modularization head forming equipment quick die changing mechanism, including male die quick die changing mechanism, press ring quick die changing mechanism and female die quick die changing mechanism;Male die quick die changing mechanism is used for the quick change and locking of head male die, including inner sleeve, outer sleeve, first locking mechanism and second locking mechanism;Press ring quick die changing mechanism includes by outer and inner successively coaxial sleeve of multiple press edge gasket and the third locking mechanism distributed in the outside of outermost press edge gasket;Female die quick die changing mechanism includes lower female die component and upper female die component, and the inner cavity of lower female die component and upper female die component constitutes ladder cavity, for supporting female die.The application can realize the quick clamping and release of head male die in male die quick die changing mechanism, simultaneously realize the quick adaptive adjustment of press ring quick die changing mechanism and female die quick die changing mechanism working size, can greatly improve the assembly efficiency of head forming die, reduce downtime.

Description

Technical Field

[0001] This invention belongs to the technical field of quick mold change mechanism, specifically a quick mold change mechanism for a modular head forming equipment. Background Technology

[0002] Currently, my country's head manufacturing industry is undergoing profound market changes. With the rapid development of pressure vessel industries such as boilers, oil refining equipment, and chemical equipment, the demand for heads has significantly shifted towards diversification and small-batch customization. Head products vary in size and specifications, covering various types such as flat-bottomed, dished, and elliptical shapes, and materials include carbon steel, alloy steel, stainless steel, and non-ferrous metals. Although my country's head production and processing has reached a certain scale, the existing production system is struggling to simultaneously meet the requirements of diversified, small-batch customization, high efficiency, and high quality in response to these market changes.

[0003] Traditional head mold changing relies primarily on bolt connections, requiring matching punches, dies, and bushings for different head specifications. This process is extremely cumbersome, time-consuming, and increases downtime, significantly reducing the effective production time. For small-batch, multi-specification production, frequent mold changes further lower equipment utilization. Therefore, a modular head forming equipment with a rapid mold changing mechanism is urgently needed to significantly improve mold changing efficiency, reduce downtime, and better adapt to the market demand for smaller batches and more diverse head manufacturing. Summary of the Invention

[0004] This invention provides a modular head forming equipment with a quick mold changing mechanism to enable the quick clamping and release of the mold shank at the top of the head punch within the quick mold changing mechanism, while also enabling the rapid adaptation and adjustment of the working dimensions of the quick mold changing mechanism for the pressure ring and the quick mold changing mechanism for the die.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A modular head forming equipment quick mold changing mechanism includes a punch quick mold changing mechanism, a pressure ring quick mold changing mechanism, and a die quick mold changing mechanism; The punch quick-change mechanism includes an inner tube and an outer tube coaxially sleeved on the outside of the inner tube. The die shank at the top center of the punch is inserted into the center hole at the bottom of the inner tube. The bottom of the inner tube is provided with a first locking mechanism for locking the die shank onto the inner tube, and the bottom of the outer tube is provided with a second locking mechanism for locking the outer tube onto the inner tube. The quick mold changing mechanism for the blank holder ring includes multiple layers of blank holder rings coaxially sleeved from the outside to the inside, and a third locking mechanism distributed outside the outermost blank holder ring for locking the outermost blank holder ring. Adjacent blank holder rings are detachably connected by a movable pin mechanism. The quick die changing mechanism includes a lower die assembly and an upper die assembly. The inner cavities of the lower die assembly and the upper die assembly form a stepped cavity to support the die. The lower die assembly includes a die support and multiple layers of lower die bushings coaxially sleeved in the die support. The upper die assembly includes a die top ring coaxially embedded on the top of the die support and multiple layers of upper die bushings coaxially sleeved in the die top ring.

[0006] Furthermore, the first locking mechanism includes two first hydraulic cylinders symmetrically arranged inside the bottom end of the inner cylinder. Each first hydraulic cylinder has a locking block fixedly connected to its output shaft end. When the two locking blocks are engaged, they can clamp the top of the mold handle.

[0007] Furthermore, the second locking mechanism includes several second hydraulic cylinders fixedly disposed at the bottom end of the outer cylinder and evenly distributed around the circumference of the inner cylinder. Each second hydraulic cylinder has a locking pin fixedly connected to its output shaft end, and the end of the locking pin is movably inserted into the bottom end of the inner cylinder.

[0008] Furthermore, the outer pressure liner has several circumferentially distributed pins that are movably arranged radially on the inner wall of the sidewall, and a baffle that is movably embedded in the outer wall surface and movably contacts the outer end of the pin. The inner pressure liner has an annular groove on the outer wall surface that matches the inner end of the pin. After the baffle is inserted into the assembly position, the inner end of the pin is inserted into the annular groove. After the baffle is moved up to the disassembly position, the inner pressure liner moves down and pushes the pin into the side wall of the outer pressure liner.

[0009] Furthermore, the bottom of the outer wall of the pressure ring is provided with an alignment boss and the bottom of the inner wall is provided with an alignment groove, and the alignment boss of each pressure ring matches the alignment groove of the pressure ring adjacent to it on the outside.

[0010] Furthermore, the third locking mechanism includes a locking cylinder, a fixed wedge block fixedly disposed at the outer end of the inner side of the locking cylinder, a movable wedge block rotatably disposed within the locking cylinder, a guide cylinder fixedly connected to the inner side of the locking cylinder, and a locking rod movably disposed within the guide cylinder. The movable wedge block and the fixed wedge block are in contact through the wedge surface, the outer end of the locking pin is in contact with the inner end face of the movable wedge block, and a return spring located within the guide cylinder is sleeved on the outer side of the locking pin.

[0011] Furthermore, the top surface of the die support is provided with an annular protrusion, and the bottom surface of the die top ring is provided with an annular groove that matches and inserts into the annular protrusion.

[0012] Furthermore, the top ends of the die support and the lower die bushing are provided with several sets of first through grooves, and the bottom ends are provided with several sets of second through grooves.

[0013] Furthermore, the sidewalls of both the die support and the lower die bushing are tapered surfaces that are larger at the top and smaller at the bottom.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention uses a hydraulically driven clamping mechanism to realize the quick clamping and release of the die shank at the top of the end cap punch in the punch quick change mechanism, thereby enabling flexible and convenient change of multiple specifications of punches, and enabling quick and automatic centering without the need for existing connection and pressure plate structures for fixation, which greatly improves the efficiency of punch switching, reduces equipment downtime, and thus improves equipment utilization. 2. The punch quick change mechanism of the present invention sets an outer cylinder on the outside of the inner cylinder and realizes direct connection between the outer area of ​​the top die shank of the large-sized end cap punch and the power end of the main oil cylinder through multiple evenly distributed locking mechanisms. By dispersing the contact stress at the connection position of the top of the end cap punch, the risk of punch top cracking failure caused by stress concentration in the die shank connection can be effectively reduced. 3. This invention employs a quick-change die-changing mechanism for the pressure ring to facilitate the rapid replacement of the internal pressure ring, ensuring the smooth passage of the head punch and the assembly of the corresponding pressure ring at the bottom of the quick-change die-changing mechanism according to the size specifications of the head punch. A quick-change die-changing mechanism for the die holder allows for the rapid replacement of the die holder's structural dimensions, enabling the installation of dies of different specifications. This significantly improves the assembly efficiency of the head forming mold and reduces downtime, thus better adapting to the market demand for head manufacturing towards small-batch, multi-variety production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the quick mold changing mechanism of the modular head forming equipment of the present invention; Figure 2 This is a schematic diagram of the structure of the punch quick-change mechanism; Figure 3 This is one of the structural schematic diagrams of the inner tube; Figure 4 This is the second structural schematic diagram of the inner tube; Figure 5 This is a schematic diagram of the structure of the first locking mechanism; Figure 6 for Figure 5 A magnified structural diagram of part A in the middle; Figure 7 This is one of the structural schematic diagrams of the external cylinder; Figure 8 This is the second structural schematic diagram of the external tube; Figure 9 This is a schematic diagram of the second locking mechanism; Figure 10This is a schematic diagram of the quick mold changing mechanism for the pressure ring; Figure 11 This is a cross-sectional view of the quick mold changing mechanism for the pressure ring. Figure 12 for Figure 11 A magnified structural diagram of part B in the middle section; Figure 13 for Figure 11 A magnified structural diagram of section C; Figure 14 This is a three-dimensional structural diagram of the third locking mechanism; Figure 15 This is a cross-sectional view of the third locking mechanism; Figure 16 This is a schematic diagram of the structure of the fixed wedge block and the movable wedge block; Figure 17 This is one of the three-dimensional structural schematic diagrams of the quick die-changing mechanism. Figure 18 This is the second three-dimensional structural schematic diagram of the quick die-changing mechanism. Figure 19 This is a cross-sectional view of the quick die-changing mechanism.

[0016] In the diagram: 1. Quick die changing mechanism for punch; 11. Inner cylinder; 111. Inner cylinder; 112. Connecting plate; 113. Connecting platform; 114. Outer longitudinal plate; 12. Outer cylinder; 121. Outer cylinder; 122. Arc plate; 123. Ring plate; 124. Inner longitudinal plate; 125. Vertical plate; 13. Worktable; 131. Center hole; 14. First locking mechanism; 141. First hydraulic cylinder; 142. Locking block; 143. Guide slider; 144. Switch bracket; 145. Hall sensor block; 146. Sensor bracket; 147. First sensor; 148. Second sensor; 149. Protective plate; 15. Second locking mechanism; 151. Second hydraulic cylinder; 152. Locking pin; 2. Quick die changing mechanism for pressure ring; 21. Pressure ring bushing; 211. Pin hole; 212. Baffle slot; 2 13. Annular groove; 214. Alignment boss; 215. Alignment groove; 22. Third locking mechanism; 221. Locking cylinder; 222. Fixed wedge block; 223. Movable wedge block; 224. Guide cylinder; 225. Locking rod; 226. Left end cover; 227. Right end cover; 228. Rotating shaft; 229. Lever; 2210. Return spring; 2211. Spring cover plate; 2212. Guide sleeve 23. Pin; 24. Baffle; 25. Set screw; 3. Quick die changing mechanism; 31. Die support; 32. Lower die bushing; 33. Die top ring; 34. Upper die bushing; 311. First through slot; 312. Second through slot; 100. Main oil cylinder; 110. Slide beam; 200. Head punch; 300. Head die; 400. Blanket ring; 410. Blanket ring connecting seat. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0018] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] See appendix Figure 1 This modular head forming equipment features a quick-change die mechanism mounted on an existing hydraulic press for stamping head parts. It includes a punch quick-change die mechanism 1, a blank holder quick-change die mechanism 2, and a die quick-change die mechanism 3. The punch quick-change die mechanism 1 is fixedly connected to the bottom power output end of the main cylinder 100 of the hydraulic press, and the head punch 200 is connected to the bottom end of the punch quick-change die mechanism 1. The blank holder quick-change die mechanism 2 is fixedly connected to the bottom of the slide beam 110 of the hydraulic press and located directly below the punch quick-change die mechanism 1, and the blank holder 400 is fixedly connected to the bottom end of the blank holder quick-change die mechanism 2. The die quick-change die mechanism 3 is located directly below the blank holder quick-change die mechanism 2, and the head die 300, used in conjunction with the head punch 200, is fixedly located inside the top center of the die quick-change die mechanism 3.

[0021] In actual use, the sheet metal to be stamped is placed on the top surface of the quick die changing mechanism 3. The slide beam 110 moves down to press the pressure ring 400 tightly against the top edge of the sheet metal. Then the main oil cylinder 100 drives the end-cap punch 200 to move down and applies stamping forming force to the top surface of the sheet metal, thereby cooperating with the end-cap die 300 at the bottom to complete the stamping forming process of the end-cap part.

[0022] like Figure 2 As shown, the punch quick-change mechanism 1 includes an inner cylinder 11 and an outer cylinder 12 coaxially sleeved on the outside of the inner cylinder 11. Specifically, as... Figure 3 and Figure 4 As shown, the inner connecting cylinder 11 is a welded assembly, consisting of an inner cylinder 111, a connecting plate 112 at the top of the inner cylinder 111, a connecting platform 113 at the bottom of the inner cylinder 111, and multiple outer longitudinal plates 114 circumferentially distributed on the outer side of the inner cylinder 111. The connecting plate 112 is bolted to the output shaft end of the main cylinder 100, thereby fixing the inner connecting cylinder 11 at the bottom of the main cylinder 100. The bottom of the connecting platform 113 is bolted to a worktable 13, and a first locking mechanism 14 is provided on the top surface of the worktable 13. Preferably, the top edge of the connecting platform 113 is provided with a positioning step, and the bottom edge of the connecting platform 113 is provided with a positioning flange that matches the positioning step. Through the engagement of the positioning flange with the shaft hole and end face of the positioning step, the worktable 13 can be quickly and accurately positioned within the bottom of the connecting platform 113, facilitating the fixed assembly of the two.

[0023] The bottom end of the inner cylinder 11 is provided with a first locking mechanism 14 for locking the mold handle onto the inner cylinder 11. For example... Figure 5 and Figure 6As shown, the first locking mechanism 14 includes two first hydraulic cylinders 141 symmetrically arranged on the top surface of the worktable 13. Each first hydraulic cylinder 141 has a locking block 142 fixedly connected to its output shaft end. A central hole 131 is provided at the center of the worktable 13 and the connecting platform 113. The mold shank at the center of the top of the end cap punch 200 is inserted into this central hole 131. An annular clamping groove is provided at the top of the mold shank between the horizontal ends of the locking blocks 142. A semi-circular hole is provided on the end face of the locking blocks 142 near the central hole 131. After the two locking blocks 142 are driven and engaged by the two first hydraulic cylinders 141, the two semi-circular holes close to form a circular hole that matches the outer circular surface of the annular clamping groove of the mold shank, thereby clamping the top of the mold shank. Simultaneously, the top of the mold shank overlaps the top surface of the two locking blocks 142, achieving axial positioning of the mold shank within the punch quick-change mechanism 1.

[0024] Preferably, guide grooves are provided in combination on the top surface of the worktable 13 and the bottom surface of the connecting platform 113. The two sides of the two locking blocks 142 slide against the groove walls of the guide grooves, thereby guiding the horizontal movement of the locking blocks 142. Further, guide sliders 143 made of wear-resistant material are provided on both sides of the two locking blocks 142, allowing the sides of the guide sliders 143 to slide against the groove walls of the guide grooves, reducing wear caused by the reciprocating motion of the locking blocks 142. Switch brackets 144 are fixedly connected to the outer end faces of the two locking blocks 142, and Hall effect sensors 145 are provided at the ends of the switch brackets 144. A sensor bracket 146 is provided at the end of the guide groove on the top surface of the worktable 13, and a first sensor 147 and a second sensor 148 are respectively mounted on the sensor bracket 146. The Hall effect sensor 145 moves horizontally synchronously with the locking blocks 142, and its cooperation with the two sensors enables the position detection of the locking blocks 142. Meanwhile, notches located outside the first hydraulic cylinder 141 are provided on the outer circular surfaces of the worktable 13 and the connecting platform 113, respectively. Protective plates 149 are embedded in the upper and lower notches on the same side. The upper and lower ends of the protective plates 149 are fixedly connected to the worktable 13 and the connecting platform 113 by bolts to protect the internal locking mechanism.

[0025] like Figure 7 and Figure 8 As shown, the outer cylinder 12 is a welded assembly, which is formed by welding an outer cylinder 121, two arc plates 122 located at the top of the outer cylinder 121, an annular plate 123 located at the bottom of the outer cylinder 121, and multiple inner longitudinal plates 124 distributed circumferentially on the inner side of the outer cylinder 121. The outer cylinder 121 is coaxially sleeved on the outer side of the inner cylinder 111, the arc plate 122 is coaxially sleeved on the outer side of the connecting plate 112, and the annular plate 123 is coaxially sleeved on the outer side of the connecting platform 113, so that the outer cylinder 12 can be sleeved on the outer side of the inner cylinder 11 from bottom to top.

[0026] The bottom end of the outer sleeve 12 is provided with a second locking mechanism 15 for locking the outer sleeve 12 onto the inner sleeve 11. For example... Figure 9 As shown, multiple (six in this embodiment) circumferentially distributed vertical plates 125 are welded to the inner edge of the top surface of the ring plate 123, and shaft holes are provided on the vertical plates 125. The second locking mechanism 15 includes six second hydraulic cylinders 151 fixedly disposed on the top surface of the ring plate 123 and evenly distributed around the circumference of the inner cylinder. A locking pin 152 is fixedly connected to the output shaft end of each second hydraulic cylinder 151. The bottom side wall of the outer cylinder 121 has mounting holes corresponding to the outer side of the vertical plates 125. The second hydraulic cylinders 151 of the second locking mechanism 15 are fixedly installed in the mounting holes, and the locking pins 152 connected to the output rod ends of the second hydraulic cylinders 151 movably pass through the shaft holes of the vertical plates 125. An annular groove is provided on the outer circular surface of the connecting platform 113, and the vertical cross-sectional profile of the annular groove matches the end profile of the locking pin 152.

[0027] When using a large-size head punch 200, the head punch 200 is first coaxially set at the bottom end of the outer tube 12, and the ring plate 123 is fixedly connected to the top surface of the head punch 200 by bolts. Then, the outer tube 12 and the head punch 200 are raised and lowered together to the outside and bottom of the inner tube 11. After the die shank at the center of the top surface of the head punch 200 is inserted into the center hole at the bottom of the inner tube 11, the first hydraulic cylinder 141 of the first locking mechanism 14 drives the two locking blocks 142 to move closer to each other and clamp the die shank. The second hydraulic cylinder 151 of the second locking mechanism 15 drives the corresponding locking pin 152 to move inward at the same time until the end of the locking pin 152 is embedded in the annular groove of the connecting platform 113 and the outer tube 12 is fixedly connected to the inner tube 11.

[0028] like Figure 10 and Figure 11 As shown, the quick-change mold mechanism 2 for the blank holder ring includes multiple layers of blank holder rings 21 coaxially sleeved from the outside to the inside, and a third locking mechanism 22 distributed outside the outermost blank holder ring 21 for locking the outermost blank holder ring 21. Adjacent layers of blank holder rings 21 are detachably connected by a movable pin mechanism. Specifically, as shown... Figure 12As shown, the outer edge retainer 21 has several circumferentially distributed pin holes 211 radially distributed inside its sidewall. A pin 23 is movably inserted into each pin hole 211. A baffle slot 212, connected to the pin holes and vertically distributed, is also provided on the outer wall. A baffle 24, which movably contacts the outer end of the pin 23, is movably embedded in the baffle slot 212. An annular groove 213, matching the inner end of the pin 23, is provided on the outer wall of the inner edge retainer 21. After the baffle 24 is lowered to the assembly position, the inner end of the pin 23 is inserted into the annular groove 213, thus fixing the inner edge retainer 21 to the outer edge retainer 21. After the baffle 24 is moved to the disassembly position, the inner edge retainer 21 naturally moves downward under gravity, pushing the pin 23 into the sidewall of the outer edge retainer 21, thereby achieving rapid disassembly of the inner and outer edge retainers. Obviously, since the pressure edge bushings 21 are connected by nesting layers, when the baffle 24 on the outer wall of a certain pressure edge bushing 21 is pulled up, the multiple layers of pressure edge bushings 21 on the inner side of that pressure edge bushing 21 will fall off as a whole.

[0029] Preferably, such as Figure 13 As shown, the bottom of the outer wall of the pressure liner 21 is provided with a positioning boss 214 and the bottom of the inner wall is provided with a positioning groove 215. The positioning boss 214 of each pressure liner 21 matches the positioning groove 215 of its adjacent outer pressure liner 21. Thus, when the inner pressure liner 21 is nested inside the outer pressure liner 21 from bottom to top from the bottom of the outer pressure liner 21, axial positioning can be achieved through the positioning boss 214 and the positioning groove 215 on the outer pressure liner 21, so that the annular groove 213 on its outer wall is located inside the end of the pin 23 in the adjacent outer pressure liner 21. The top surface of the pressure liner 21 is provided with a screw hole that communicates with the pin hole 211. A set screw 25 is provided in the screw hole. The top end of the pin 23 is provided with a waist-shaped groove. The bottom end of the set screw 25 is embedded in the waist-shaped groove. The position of the pin 23 can be assisted by the set screw 25.

[0030] The third locking mechanism 22 is configured as 4 groups, which are fixedly installed in the side wall of the annular pressure ring connecting seat 410 and evenly distributed axially. The pressure ring connecting seat 410 is fixedly connected to the bottom of the slide beam 110 through connecting columns. Each pressure ring 21 has a threaded hole on its bottom surface. After the total number of pressure rings 21 is set according to the specifications of the end cap punch 200, and the diameter of its innermost center hole is set, a pressure ring 400 of the corresponding specification is matched and fastened to the bottom surface of the pressure ring 21 with bolts.

[0031] In this embodiment, the third locking mechanism 22 adopts a manual lever-type self-locking mechanism. For example... Figure 14 and Figure 15As shown, the third locking mechanism 22 includes a locking cylinder 221, a fixed wedge block 222 fixedly disposed at the outer end of the inner cavity of the locking cylinder 221, a movable wedge block 223 rotatably disposed within the locking cylinder 221, a guide cylinder 224 fixedly connected to the inner side of the locking cylinder 221, and a locking rod 225 movably disposed within the guide cylinder 224. Specifically, the locking cylinder 221 is a hollow cylindrical cylinder, with a left end cap 226 and a right end cap 227 respectively connected to its left and right ends by screws to fix the assembly of the wedge block 222 and the movable wedge block 223 within the locking cylinder 221. Figure 16 As shown, both the fixed wedge block 222 and the movable wedge block 223 are hollow cylindrical structures. Each has two opposing quarter-cylindrical walls on its opposite end faces. The end faces of these two quarter-cylindrical walls are provided with wedge-shaped surfaces in the same direction, with the top of the wedge-shaped surface being a flat plane. Thus, the movable wedge block 223 and the fixed wedge block 222 are in contact via the wedge-shaped surfaces. Since the fixed wedge block 223 is fixed to the left cover plate 226 with screws, when the movable wedge block 223 rotates relative to the fixed wedge block 222, the wedge-shaped surfaces cause the movable wedge block 223 to move horizontally radially inward (closer to the pressure edge bushing 21). This pushes the locking rod 225 to move synchronously in the same direction, causing the end of the locking rod 225 to embed into the annular groove 213 on the outer wall of the outermost pressure edge bushing 21. Through the cooperation of the four locking rods 225, the horizontal positioning and locking of the pressure edge bushing 21 are achieved.

[0032] To facilitate the rotation of the movable wedge block 223, a rotating shaft 228 is fixedly connected to the axis of the movable wedge block 223. The outer end of the rotating shaft 228 extends through to the outer side of the left end cover 226 and is fixedly connected to a lever 229. Thus, by manually pushing the lever 229 to drive the rotating shaft 228 to rotate, the movable wedge block 223 can rotate relative to the fixed wedge block 222, thereby achieving horizontal movement of the movable wedge block 223. When the top planes of the wedge surfaces of the movable wedge block 223 and the fixed wedge block 222 mate, the locking mechanism is in a locked state. Continuing to move lever 229 allows the wedge surfaces to completely separate, freeing the movable wedge block 223. Moving lever 229 in the opposite direction also allows the movable wedge block 223 to move horizontally. To ensure the movable wedge block 223 can automatically reset, the locking lever 225 has a shoulder at its left end within the guide cylinder 224, and a return spring 2210 is sleeved on its right side within the guide cylinder 224. A spring cover plate 2211 is fixedly connected to the right end of the guide cylinder 224 and sleeved on the outside of the locking lever 225. When the movable wedge block 223 moves horizontally to the right, the end of the locking lever 225 is embedded in the annular groove 213 on the outer wall of the outermost pressure liner 21, compressing the return spring 2210. When the movable wedge block 223 can move to the left, the return spring 2210 pushes the locking lever 225 to the left. Preferably, in order to maintain the end stability of the locking rod 225 and the smoothness of horizontal movement, a guide sleeve 2212 is fixedly installed on the inner wall of the pressure ring connecting seat 410, and the end of the locking rod 225 is movably inserted into the guide sleeve 2212.

[0033] like Figures 17 to 19As shown, the quick die-changing mechanism 3 includes a lower die assembly and an upper die assembly. The inner cavities of the lower and upper die assemblies form a stepped cavity to support the die. The lower die assembly includes a die support 31 and multiple layers of lower die bushings 32 coaxially sleeved within the die support. The upper die assembly includes a die top ring 33 coaxially embedded on the top of the die support 31 and multiple layers of upper die bushings 34 coaxially sleeved within the die top ring 33. Specifically, the top surface of the die support 31 has an annular protrusion, and the bottom surface of the die top ring 33 has an annular groove that matches and inserts into the annular protrusion. Through the matching insertion of the annular protrusion and the annular groove, the die top ring 33 can be quickly positioned and assembled on the die support 31. The inner diameter of the die top ring 33 is larger than the inner diameter of the die support 31, thus the vertical cross-sectional shape of the stepped cavity is "T"-shaped. The top edge ring of the inner hole of the die top ring 33 and the top edge ring of the inner hole of the die support 31 can support the bottom surface of the semi-ellipsoidal die, realizing the quick installation and automatic centering positioning of the die. By layering the lower die bushing 32, the hole radius of the lower support position can be changed, and by layering the upper die bushing 34, the hole radius of the upper support position can be changed. By combining the hole diameters of the upper and lower support positions, the structural dimensions of the die base can be quickly changed to install dies of different specifications. This can greatly improve the assembly efficiency of the head forming mold, reduce downtime, and thus better adapt to the market demand for head manufacturing to develop towards small batches and multiple varieties.

[0034] Preferably, the top ends of the die support 31 and the lower die bushing 32 are provided with a plurality of first through slots 311, and the bottom ends are provided with a plurality of second through slots 312. By setting a lifting rod in the first through slot 311, it is convenient to raise and lower the upper die assembly above it as a whole by setting the lifting rod; by setting a lifting rod in the second through slot 312, it is convenient to raise and lower the lower die assembly above it or the entire die quick change mechanism 3 as a whole by setting the lifting rod.

[0035] More preferably, in order to facilitate the layering of the lower die bushing 32 within the die support 21, both the die support 21 and the sidewalls of the lower die bushing 32 are tapered surfaces that are larger at the top and smaller at the bottom, that is, the angle α between the generatrix of their cylindrical surfaces and the inner horizontal plane is an obtuse angle.

[0036] The quick mold change mechanism achieves quick mold change using the following method: (1) The quick die changing mechanism for the punch enables quick changing of the head punch: S11. The telescopic rod of the first hydraulic cylinder 141 is retracted, causing the locking blocks 142 to move away from each other and open, releasing the clamping of the mold handle. The head punch 200 then automatically falls under the action of gravity to complete the demolding. Obviously, before this, the top of the head punch 200 needs to be connected to the lifting device. After the locking blocks 142 release the clamping of the mold handle, the lifting device is used to slowly lower and transfer the head punch 200.

[0037] S12. Replace the required head punch 200. Use a lifting device to vertically lift the head punch 200 so that the die handle is inserted between the two locking blocks 142. Control the extension rod of the first hydraulic cylinder 141 to extend, causing the two locking blocks 142 to move closer to each other and engage, thereby clamping the die handle and realizing the rapid locking of the head punch 200.

[0038] (2) The quick mold changing mechanism for the bushing enables quick replacement of the pressure bushing: S21. By reverse-moving the lever 229, the end of the locking lever 225 can be separated from the annular groove 213 on the outermost pressure ring 21, thereby allowing the entire ring to be removed. S22. By turning the lever 229, the end of the locking lever 225 can be inserted into the annular groove 213 on the outermost pressure ring 21, thereby clamping and fixing the entire ring. According to the size of the head blank, the specifications of the bushing can be adjusted to adapt to the size of the pressure ring 400 and the head punch 200. If a large-size head is to be formed, the baffle 24 on a certain layer of pressure bushing 21 can be pulled out as needed, so that the pin 23 can move freely in the lateral direction, and the corresponding inner pressure bushing 21 will fall off naturally under the action of gravity. The pressure bushing 21 can be removed layer by layer, or multiple layers can be removed at the same time. Just pull out the baffle 24 of a certain layer as needed.

[0039] (3) The quick die changing mechanism enables rapid adjustment of the die mounting dimensions: According to the specifications of the head punch 200, the number of layers of the lower die bushing 32 and the upper die bushing 34 are adjusted respectively, thereby changing the size of the internal stepped cavity to adapt to the installation requirements of the die.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A quick mold changing mechanism for a modular head forming equipment, characterized in that: This includes a quick die changing mechanism for the punch, a quick die changing mechanism for the blank holder, and a quick die changing mechanism for the die. The punch quick-change mechanism includes an inner tube and an outer tube coaxially sleeved on the outside of the inner tube. The die shank at the top center of the punch is inserted into the center hole at the bottom of the inner tube. The bottom of the inner tube is provided with a first locking mechanism for locking the die shank onto the inner tube, and the bottom of the outer tube is provided with a second locking mechanism for locking the outer tube onto the inner tube. The quick mold changing mechanism for the blank holder ring includes multiple layers of blank holder rings coaxially sleeved from the outside to the inside, and a third locking mechanism distributed outside the outermost blank holder ring for locking the outermost blank holder ring. Adjacent blank holder rings are detachably connected by a movable pin mechanism. The quick die changing mechanism includes a lower die assembly and an upper die assembly. The inner cavities of the lower die assembly and the upper die assembly form a stepped cavity to support the die. The lower die assembly includes a die support and multiple layers of lower die bushings coaxially sleeved in the die support. The upper die assembly includes a die top ring coaxially embedded on the top of the die support and multiple layers of upper die bushings coaxially sleeved in the die top ring.

2. The quick mold changing mechanism of the modular head forming equipment according to claim 1, characterized in that: The first locking mechanism includes two first hydraulic cylinders symmetrically arranged inside the bottom end of the inner cylinder. Each first hydraulic cylinder has a locking block fixedly connected to its output shaft end. When the two locking blocks are engaged, they can clamp the top of the mold handle.

3. The quick mold changing mechanism of the modular head forming equipment according to claim 1, characterized in that: The second locking mechanism includes several second hydraulic cylinders that are fixedly disposed at the bottom end of the outer cylinder and evenly distributed around the circumference of the inner cylinder. Each second hydraulic cylinder has a locking pin fixedly connected to its output shaft end, and the end of the locking pin is movably inserted into the bottom end of the inner cylinder.

4. The quick mold changing mechanism of the modular head forming equipment according to any one of claims 1 to 3, characterized in that: The outer pressure liner has several circumferentially distributed pins that are movably arranged radially on the inner wall of the side wall, and a baffle that is movably embedded in the outer wall surface and movably contacts the outer end of the pin. The inner pressure liner has an annular groove on the outer wall surface that matches the inner end of the pin. After the baffle is inserted into the assembly position, the inner end of the pin is inserted into the annular groove. After the baffle is moved up to the disassembly position, the inner pressure liner moves down and pushes the pin into the side wall of the outer pressure liner.

5. The quick mold changing mechanism of the modular head forming equipment according to claim 4, characterized in that: The bottom of the outer wall of the pressure liner is provided with an alignment boss and the bottom of the inner wall is provided with an alignment groove. The alignment boss of each pressure liner matches the alignment groove of the adjacent pressure liner on its outer side.

6. The quick mold changing mechanism of the modular head forming equipment according to claim 4, characterized in that: The third locking mechanism includes a locking cylinder, a fixed wedge block fixedly disposed at the outer end of the inner side of the locking cylinder, a movable wedge block rotatably disposed within the locking cylinder, a guide cylinder fixedly connected to the inner side of the locking cylinder, and a locking rod movably disposed within the guide cylinder. The movable wedge block and the fixed wedge block are in contact through the wedge surface. The outer end of the locking pin is in contact with the inner end face of the movable wedge block. A return spring located within the guide cylinder is sleeved on the outer side of the locking pin.

7. The quick mold changing mechanism of the modular head forming equipment according to any one of claims 1 to 3, or 5 or 6, is characterized in that: The top surface of the die support is provided with an annular protrusion, and the bottom surface of the die top ring is provided with an annular groove that matches and inserts into the annular protrusion.

8. The quick mold changing mechanism of the modular head forming equipment according to claim 7, characterized in that: The top end of the die support and the bottom end of the lower die bushing are provided with several sets of first through grooves, and the bottom end is provided with several sets of second through grooves.

9. The quick mold changing mechanism of the modular head forming equipment according to claim 8, characterized in that: The sidewalls of both the die support and the lower die bushing are tapered surfaces, wider at the top and narrower at the bottom.

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