Progressive forming rolling tool head
By designing the connecting part and inner support part of the progressively forming rolling tool head, the problems of wear and movement of the tool head during use are solved, achieving stable fixation and efficient assembly and disassembly, and expanding its application range in high-degree-of-freedom complex force scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUAZHONG UNIV OF SCI & TECH
- Filing Date
- 2026-04-28
- Publication Date
- 2026-06-05
AI Technical Summary
Existing progressive forming tool heads, during use, have rigid locking without elastic compensation margin, are prone to wear, and generate axial movement clearance, leading to abnormal noise, eccentricity, fatigue loosening, or even failure. In addition, the needle roller bearings are easily damaged, making maintenance difficult and limiting their application in high-degree-of-freedom complex force scenarios.
The design employs a connecting section and an internal support section. Through the combination of limiting components, locking components, spreading components, and rotating components, and by utilizing the linkage of hooks, springs, tapered plates, extrusion plates, miniature deep groove ball bearings, and rollers, it achieves slewing support and pre-tightening positioning, reduces insertion resistance, eliminates axial movement gaps, and resists vibration loosening. Furthermore, the cooperation of elastic rings and tapered plates ensures stable fixation of the miniature deep groove ball bearings.
It effectively reduces insertion resistance, improves disassembly and assembly efficiency, eliminates axial movement gaps, resists vibration and loosening, extends the service life of the tool head, facilitates non-destructive maintenance, is suitable for high-degree-of-freedom progressive forming processes, and improves the surface quality and precision of the formed surface.
Smart Images
Figure CN122142175A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mechanical engineering technology, specifically to a progressive forming rolling tool head. Background Technology
[0002] Incremental forming is a flexible incremental processing method for forming three-dimensional curved surfaces of metal sheets. It enables digital manufacturing. In incremental forming, the tool head used in the traditional way is an integrated tool head. The part that contacts the metal sheet is hemispherical. The metal part is gradually extruded and shaped by sliding the tool head relative to the sheet. Therefore, the surface of the traditional tool head is prone to wear, which leads to a decrease in the forming accuracy of the sheet and an increase in the required forming force. At the same time, the surface of the formed part is prone to scratches.
[0003] Chen Jun of Shanghai Jiao Tong University designed a water-cooled rolling tool head for electrothermal assisted progressive forming (patent number: CN 104690160 A). This tool head uses rolling friction instead of sliding friction to improve surface quality and employs a single-sided needle roller bearing design. However, existing tool heads, during use, suffer from rigid locking without elastic compensation margin. Under operational vibration, they are prone to wear and loosening, resulting in axial movement and clearance, causing abnormal noise, eccentricity, and exacerbating fatigue loosening or even failure. Frequent use also makes the needle roller bearing susceptible to damage from complex forces, leading to difficult replacement and maintenance. This makes them unsuitable for next-generation rolling progressive forming processes under high-degree-of-freedom complex stress scenarios, thus limiting the application scope of progressive forming. Summary of the Invention
[0004] The purpose of this invention is to provide a progressive forming rolling tool head. By setting a connecting part, it solves the problems of existing tool heads during use, such as rigid locking without elastic compensation margin, easy wear and loosening under running vibration, axial movement clearance, abnormal noise, eccentricity, accelerated fatigue loosening or even failure, and the difficulty of replacement and maintenance due to the needle roller bearing being easily damaged by complex forces during frequent use.
[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:
[0006] This invention relates to a progressive forming rolling tool head, comprising a tool holder, and further comprising: a connecting portion mounted on the tool holder; an inner support portion disposed on the tool holder; the connecting portion including a limiting component mounted on the tool holder; and a locking component disposed on the tool holder; the limiting component including a connecting rod disposed on the tool holder, a plurality of hooks fixedly connected to the right side of the connecting rod, a fixing ring disposed on the tool holder, an adapter disposed on the fixing ring, the hooks extending into the fixing ring, and the adapter including a limiting ring fixedly connected to the inner wall of the fixing ring, the fixing ring being adapted to the limiting ring.
[0007] Furthermore, the inner support includes a spreading assembly disposed on the tool holder; and a rotating assembly mounted on the tool holder.
[0008] Furthermore, the locking assembly includes a push plate slidably connected to the inner wall of the fixed ring. A second connecting rod is fixedly connected to the left side of the push plate, and a connecting plate is fixedly connected to the right side of the fixed ring. A spring is provided inside the fixed ring, and the left side of the spring is fixedly connected to the push plate. An auxiliary component is provided on the fixed ring. The push plate is adapted to the hook. The second connecting rod passes through the first connecting rod. The auxiliary component includes a first handle fixedly connected to the right side of the connecting plate. A second handle is fixedly connected to the left side of the threaded block. Both the first and second handles serve as limiters. The second connecting rod passes through the second handle, and the right side of the spring is fixedly connected to the first handle.
[0009] Furthermore, the spreading assembly includes a threaded block fixedly connected to the outer wall of the connecting rod, the threaded block being threadedly connected to the tool holder, a connecting ring fixedly connected to the outer wall of the connecting rod, and tapered plates fixedly connected to the outer walls of both the connecting ring and the fixed ring. Several extrusion plates are provided on the outer walls of the connecting ring and the fixed ring, and several fasteners are provided on the extrusion plates. There are six extrusion plates arranged in a circumferential array. The fasteners include several placement grooves formed on the extrusion plates, and elastic rings are provided in each of the placement grooves. The elastic rings can tighten the extrusion plates, and the placement grooves are used to restrict the position of the elastic rings.
[0010] Furthermore, the rotating assembly includes several miniature deep groove ball bearings sleeved on the outer walls of several extrusion plates. Rollers are sleeved on the outer walls of the miniature deep groove ball bearings. Limiting elements are provided on the several extrusion plates. There are three miniature deep groove ball bearings arranged in a linear array. The limiting elements include two roller washers sleeved on the outer walls of several limiting rings. The roller washers are used to limit the position of the miniature deep groove ball bearings. The rollers are made of 40Gr and are circular in shape. The miniature deep groove ball bearings are made of bearing steel or ceramic.
[0011] The present invention has the following beneficial effects:
[0012] 1. By setting a connecting part, the present invention first pre-installs the tapered plate, extrusion plate, elastic ring, roller washer, miniature deep groove ball bearing and roller on the outside of the tool holder in sequence to complete the rotation support and pre-tightening positioning; then the connecting rod one and the hook are inserted into the assembly, and the connecting rod two is aligned with the hook and the connecting rod one for installation. During insertion, the hook first contacts the limiting ring and is squeezed inward to elastically retract. Further advancement causes the hook to extend into the fixing ring and contact the push plate. The push plate compresses the spring and fully retracts the hook. After the hook passes the limiting ring, it presses the connecting rod two, causing the push plate to disengage from the hook's constraint. The hook automatically opens and resets due to its own elasticity. After releasing the connecting rod two, the compressed spring rebounds, driving the push plate to move to the left, which in turn causes the opened hook to move to the left synchronously with the connecting rod one, ultimately ensuring the hook is reliably engaged with the limiting ring, completing the axial anti-disengagement limiting lock. Utilizing the elastic deformation of the hook and the linkage compensation of the spring reduces insertion resistance, improves disassembly and assembly efficiency, eliminates axial movement gaps over the long term, resists vibration and loosening, and facilitates non-destructive disassembly and maintenance later.
[0013] 2. This invention, by setting an internal support, allows the connecting rod to move to the right when the second handle is rotated, causing the threaded block to rotate synchronously on the tool holder. Utilizing the force of the threaded transmission, the threaded block continuously compresses the connecting rod, thus pushing it to move smoothly to the right. As the connecting rod moves the fixed ring closer to the connecting ring, the two conical plates act synchronously on several outer extrusion plates, generating an outward expansion force. During this process, the elastic ring is synchronously stretched to adapt to the expansion amplitude. As the extrusion plates gradually expand outward, they eventually contact the inner wall of the miniature deep groove ball bearing. The tight contact provides internal support and fixation. After the overall installation is completed, the extrusion plate remains in an expanded state, continuously forming a stable internal support constraint force on the miniature deep groove ball bearing, thereby achieving reliable fixation of the miniature deep groove ball bearing and its matching rollers. The expansion action of the tapered plate drives the extrusion plate to expand outward, and with the tensile compensation of the elastic ring, the extrusion plate can fit tightly and evenly against the inner wall of the miniature deep groove ball bearing, effectively avoiding deformation of the miniature deep groove ball bearing caused by excessive local stress. At the same time, the elastic ring can adapt to different expansion ranges, improving the fault tolerance of the assembly.
[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1This is a partial cross-sectional view of the present invention;
[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention;
[0018] Figure 3 This is a partial cross-sectional view of the structure of the expansion component of the present invention;
[0019] Figure 4 This is a partial cross-sectional view of the connecting ring of the present invention;
[0020] Figure 5 This is a partial cross-sectional view of the locking component of the present invention;
[0021] Figure 6 This is a partial cross-sectional view of the limiting component of the present invention;
[0022] Figure 7 For the present invention Figure 1 A magnified structural diagram of A in the middle.
[0023] The attached diagram lists the components represented by each number as follows:
[0024] In the diagram: 111, tool holder; 2, connecting part; 21, limiting component; 211, connecting rod one; 212, hook; 213, fixing ring; 214, limiting ring; 22, locking component; 221, push plate; 222, connecting rod two; 223, connecting plate; 224, spring; 225, handle one; 226, handle two; 3, inner support part; 31, spreading component; 311, threaded block; 312, connecting ring; 313, tapered plate; 314, extrusion plate; 315, placement groove; 316, elastic ring; 32, rotating component; 321, miniature deep groove ball bearing; 322, roller; 323, roller washer. Detailed Implementation
[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0026] Please see Figures 1-7 As shown, the present invention is a progressive forming rolling tool head, including a tool holder 111, and further including: a connecting part 2, which is mounted on the tool holder 111; and an inner support part 3, which is disposed on the tool holder 111.
[0027] The connecting part 2 includes a limiting component 21, which is mounted on the tool holder 111; and a locking component 22, which is also mounted on the tool holder 111. The limiting component 21 includes a connecting rod 211 mounted on the tool holder 111, with several hooks 212 fixedly connected to the right side of the connecting rod 211. A fixing ring 213 is mounted on the tool holder 111, and an adapter is mounted on the fixing ring 213. The hooks 212 extend into the fixing ring 213. The adapter includes a limiting ring 214 fixedly connected to the inner wall of the fixing ring 213, and the fixing ring 213 and the limiting ring 214 are compatible. The locking component 22 includes a push plate 221 slidably connected to the inner wall of the fixing ring 213. A connecting rod 222 is fixedly connected to the left side of the push plate 221, and a connecting plate 223 is fixedly connected to the right side of the fixing ring 213. A spring 224 is installed inside the fixing ring 213. The left side of the spring 224 is fixedly connected to the push plate 221. An auxiliary component is installed on the fixing ring 213. The push plate 221 is adapted to the hook 212. The second connecting rod 222 passes through the first connecting rod 211. The auxiliary component includes a first handle 225 fixedly connected to the right side of the connecting plate 223. A second handle 226 is fixedly connected to the left side of the threaded block 311. Both the first handle 225 and the second handle 226 serve as limiters. The second connecting rod 222 passes through the second handle 226. The right side of the spring 224 is fixedly connected to the first handle 225. By setting the connecting part 2, the elastic deformation of the hook and the linkage compensation of the spring can reduce the insertion resistance, improve the disassembly and assembly efficiency, eliminate axial movement gaps and resist vibration loosening in the long term, and facilitate non-destructive disassembly and maintenance in the later stage.
[0028] The inner support 3 includes a spreading assembly 31, which is mounted on the tool holder 111; and a rotating assembly 32, which is also mounted on the tool holder 111. The spreading assembly 31 includes a threaded block 311 fixedly connected to the outer wall of the connecting rod 211. The threaded block 311 is threadedly connected to the tool holder 111. A connecting ring 312 is fixedly connected to the outer wall of the connecting rod 211. A tapered plate 313 is fixedly connected to the outer walls of both the connecting ring 312 and the fixed ring 213. Several extrusion plates are provided on the outer walls of the connecting ring 312 and the fixed ring 213. The pressure plate 314, and several extrusion plates 314, are provided with several fasteners. There are six extrusion plates 314 arranged in a circumferential array. The fasteners include several placement grooves 315 formed on the extrusion plates 314. Each placement groove 315 is provided with an elastic ring 316. The elastic ring 316 can tighten the extrusion plates 314. The placement grooves 315 are used to limit the position of the elastic ring 316. The rotating assembly 32 includes several miniature deep groove ball bearings 321 sleeved on the outer wall of the extrusion plates 314. The deep groove ball bearings are made of bearing steel or ceramic, giving the rolling tool head better load-bearing capacity and resistance to temperature oxidation. Rollers 322, made of 40Gr material, are fitted around the outer walls of several miniature deep groove ball bearings 321 to improve their wear resistance, heat resistance, and oxidation resistance. The rollers are circular, with a cross-sectional radius equal to their thickness, ensuring a small contact area between the rollers and the sheet metal. Several extrusion plates 314 are equipped with limiting components. Three miniature deep groove ball bearings 321 are arranged in a linear array. The limiting component includes two roller pads 323 sleeved on the outer wall of several limiting rings 214. The roller pads 323 are used to limit the position of the miniature deep groove ball bearing 321. By setting the inner support part 3, the expansion action of the tapered plate drives the extrusion plate to expand outward. With the tension compensation of the elastic ring, the extrusion plate can fit tightly with the inner wall of the miniature deep groove ball bearing and the force is evenly distributed. This effectively avoids the deformation of the miniature deep groove ball bearing caused by excessive local force. At the same time, the elastic ring can adapt to different expansion ranges, improving the fault tolerance of the assembly.
[0029] This invention employs a rolling tool head, using rolling friction instead of sliding friction, which can improve the surface quality of the formed material; it can improve the current situation of bulging and low surface flatness in progressive forming, reduce forming force, and improve the surface quality of the processed sheet material; it can be used in high-degree-of-freedom progressive forming processes, further expanding the application range of progressive forming.
[0030] In use, first insert the tapered plate 313 onto the tool holder 111, then fit the extrusion plate 314 and elastic ring 316 onto the outer wall of the tapered plate 313, and then fit the roller washer 323, miniature deep groove ball bearing 321, and roller 322 onto the outer wall. Next, insert the connecting rod 211 and hook 212, aligning the connecting rod 222 with the hook 212 and connecting rod 211 during insertion, allowing the connecting rod 222 to pass through the connecting rod 211 and hook 212. During insertion, the hook 212 will first contact the limiting ring 214. After contact, continuous compression will cause the hook 212 to deform, contracting inwards. As insertion continues, the hook 212 will extend into the fixing ring 213 and then contact the push plate 221. After contact, the push plate 221 will completely retract the hook 212. When the push plate 221 is pushed, the spring 224 will be compressed to a certain extent. After it is fully compressed and passes through the limiting ring 214, the connecting rod 222 is pressed. At this time, the connecting rod 222 will push the push plate 221 again. The push plate 221 will disengage from the hook 212. After disengagement, the hook 212 will return to its original position due to its elasticity. During the return, the hook 212 will unfold. At this time, the connecting rod 222 is released. After the release, the spring 224 will return to its original position. During the return, the push plate 221 will be pushed to the left. As it moves, the push plate 221 will push the hook 212 and the connecting rod 211 to the left. As it moves, the hook 212 will be locked with the limiting ring 214. After being locked together, the limiting effect can be achieved. Thus, the fixing ring 213 and the connecting rod 211 can be connected together.
[0031] When the connecting rod 211 moves to the right, the handle 226 needs to be rotated to make the threaded block 311 rotate on the tool holder 111. When the threaded block 311 rotates, it will squeeze the connecting rod 211 through the thread, thereby achieving the effect of pushing the connecting rod 211. When the connecting ring 312 and the fixing ring 213 approach each other, the two conical plates 313 will expand outward on several extrusion plates 314. When they expand further, the elastic ring 316 will be stretched. As they expand, the extrusion plates 314 will slowly contact the miniature deep groove ball bearing 321, thereby achieving the effect of internal support. After installation, the miniature deep groove ball bearing 321 can be fixed by the expansion of the extrusion plates 314, thereby achieving the effect of fixing the miniature deep groove ball bearing 321 and the roller 322.
[0032] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims
1. A progressive forming rolling tool head, comprising a tool holder (111), characterized in that, Also includes: A connecting part (2) is mounted on the tool holder (111); An inner support (3) is provided on the tool holder (111); The connecting part (2) includes a limiting component (21) mounted on the tool holder (111); and A locking component (22) is disposed on the tool holder (111); The limiting component (21) includes a connecting rod (211) disposed on the tool bar (111), a plurality of hooks (212) are fixedly connected to the right side of the connecting rod (211), a fixing ring (213) is disposed on the tool bar (111), and an adapter is disposed on the fixing ring (213). The hook (212) extends into the fixing ring (213).
2. The progressive forming rolling tool head according to claim 1, characterized in that, The inner support (3) includes a spreading assembly (31) disposed on the tool holder (111); and Rotating assembly (32) is mounted on the tool holder (111).
3. The progressive forming rolling tool head according to claim 1, characterized in that, The locking assembly (22) includes a push plate (221) slidably connected to the inner wall of the fixing ring (213). A connecting rod (222) is fixedly connected to the left side of the push plate (221), and a connecting plate (223) is fixedly connected to the right side of the fixing ring (213). A spring (224) is provided inside the fixing ring (213). The left side of the spring (224) is fixedly connected to the push plate (221). An auxiliary component is provided on the fixing ring (213). Among them, the push plate (221) is adapted to the hook (212), and the second connecting rod (222) passes through the first connecting rod (211).
4. A progressive forming rolling tool head according to claim 2, characterized in that, The spreading assembly (31) includes a threaded block (311) fixedly connected to the outer wall of the connecting rod (211). The threaded block (311) is threadedly connected to the tool bar (111). A connecting ring (312) is fixedly connected to the outer wall of the connecting rod (211). A tapered plate (313) is fixedly connected to the outer walls of both the connecting ring (312) and the fixed ring (213). A plurality of extrusion plates (314) are provided on the outer walls of the connecting ring (312) and the fixed ring (213). A plurality of fasteners are provided on the plurality of extrusion plates (314). Among them, there are six extrusion plates (314) arranged in a circular array.
5. A progressive forming rolling tool head according to claim 2, characterized in that, The rotating assembly (32) includes a plurality of miniature deep groove ball bearings (321) sleeved on the outer wall of a plurality of extrusion plates (314), rollers (322) are sleeved on the outer wall of the plurality of miniature deep groove ball bearings (321), and limiting members are provided on the plurality of extrusion plates (314); Among them, three miniature deep groove ball bearings (321) are provided and are arranged in a linear array.
6. A progressive forming rolling tool head according to claim 1, characterized in that, The adapter includes a limiting ring (214) that is fixedly connected to the inner wall of the fixing ring (213). Among them, the fixing ring (213) is adapted to the limiting ring (214).
7. A progressive forming rolling tool head according to claim 3, characterized in that, The auxiliary component includes a handle one (225) fixedly connected to the right side of the connecting plate (223), and a handle two (226) fixedly connected to the left side of the threaded block (311). Among them, handle one (225) and handle two (226) both serve as limiters, connecting rod two (222) passes through handle two (226), and the right side of spring (224) is fixedly connected to handle one (225).
8. A progressive forming rolling tool head according to claim 4, characterized in that, The fastener includes a plurality of placement slots (315) formed on a plurality of extrusion plates (314), and each of the plurality of placement slots (315) is provided with an elastic ring (316). Among them, the elastic ring (316) can tighten several extrusion plates (314), and the placement groove (315) is used to limit the position of the elastic ring (316).
9. A progressive forming rolling tool head according to claim 5, characterized in that, The limiting element includes two roller pads (323) sleeved on the outer wall of several limiting rings (214). Among them, the roller shim (323) is used to limit the position of the miniature deep groove ball bearing (321).