Tool for strengthening transition fillet through cold rolling
By designing a cold rolling reinforcement tool with adjustable angles, the existing cold rolling reinforcement machine tools are solved, and efficient and stable transitional rounded corner processing is achieved to adapt to a variety of products.
Patent Information
- Application Number
- CN202422224779.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing cold rolling reinforcement machine tools require a separate process to process the transition rounded corners, which is low in processing efficiency, and the angle of the roller blade is unadjustable, resulting in a large impact force on the machine tool and serious wear.
A cold-rolling reinforced transitional rounded corner tool is designed, including a processing part and a fixing part, adjusting the connection angle through a limit hole, and is installed on the lathe, the roller blade can be adjusted angle, and the combination of the chuck and the jacket provides stable support and reduces vibration.
Improve processing efficiency, adapt to different products, reduce operating steps, reduce machine tool wear, enhance versatility, and reduce impact.
Smart Images
Figure CN223129882U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of transition fillet strengthening tools, in particular to a tooling for cold rolling and strengthening transition fillets. Background Art
[0002] Bolts, rivets and other fasteners are important parts indispensable in modern large-scale mobile equipment such as airplanes. With the improvement of the fatigue life requirements of mechanical structures, the fatigue life of fasteners must also be correspondingly improved, and the main method to improve the fatigue life is through cold rolling strengthening. At present, the processing method of the transition fillet under the cold rolling strengthening head used in China is to adopt a special rolling R machine tool (i.e., a cold rolling strengthening machine tool). This method needs to be processed in a separate process. That is, after the product is completed on the contour processing machine tool, it also needs to be replaced to another special cold rolling strengthening machine tool and re-clamped, which requires more manpower and material resources and also takes more processing time, resulting in low processing efficiency. Moreover, most of the processing angles of the roller blades of the existing rolling R machine tools cannot be adjusted, which limits the types of products. And when processing products, the contact between the roller blades and the processing part of the product will generate severe vibrations, which will generate a large impact force on the rolling R machine tool, increase wear and reduce the service life. Content of the Utility Model
[0003] In order to overcome the problems in the above background art that a special cold rolling strengthening machine tool needs to be used to strengthen the transition fillet, the processing efficiency is low, and the existing cold rolling strengthening machine tool cannot adjust the processing angle to be applicable to different products, the utility model provides a tooling for cold rolling and strengthening transition fillets, which can be installed on various contour processing machine tools, and has the beneficial effects of reducing operation steps, improving processing efficiency, having a wider adaptability, and reducing the impact force on the machine tool.
[0004] The technical solution of the utility model is as follows:
[0005] A tooling for cold rolling and strengthening transition fillets includes a processing part and a fixing part connected together. The connection angle between the processing part and the fixing part can be adjusted through a limiting hole. The processing part includes a collet and a chuck fixed in the collet. A roller blade is arranged at the head of the chuck, and the roller blade is used for rolling the transition fillet of the product. The fixing part is fixedly connected with a lathe.
[0006] Preferably, the fixing part includes a tool shank and a fixing shank connected integrally. A clamping groove is formed at the tail of the collet, the tool shank is clamped in the clamping groove, and the tail end of the fixing shank is fixed on the universal tool rest of the lathe.
[0007] Further preferably, the limiting holes include a general limiting hole and adjusting holes. The side wall of the clamping groove and the tool handle are respectively provided with a general limiting hole and a plurality of adjusting holes. The limiting bolt passes through the general limiting hole, and the adjusting holes of the clamping groove and the tool handle correspond one by one. The limiting pin passes through a single group of corresponding adjusting holes to adjust the connection position.
[0008] Preferably, the roller blade is clamped between the upper clamping piece and the lower clamping piece of the chuck and is in parallel contact with both. The positioning pin sequentially passes through the upper clamping piece, the roller blade and the lower clamping piece, and the roller blade can rotate around the positioning pin.
[0009] Further preferably, the roller blade is of an annular structure, and its ring body gradually becomes thinner from the inside to the outside, and the edge is smoothly transitioned.
[0010] Further preferably, a copper sheet is connected between the top surface of the roller blade and the upper clamping piece, and a copper sheet is also connected between the bottom surface of the roller blade and the lower clamping piece. The copper sheet is sleeved on the positioning pin.
[0011] Further preferably, the chuck is a square chuck.
[0012] Preferably, the body part of the chuck extends into the groove of the collet and can move back and forth in the groove.
[0013] Further preferably, a fixing hole is provided on the top surface of the head part of the collet. The locking bolt passes downward through the fixing hole and extends into the chuck to clamp the chuck in the groove. The end of the locking bolt can move back and forth in the fixing hole.
[0014] Further preferably, a fixing column is connected to the tail part of the chuck. A spring is sleeved on the column body of the fixing column. One end of the spring abuts against the end face of the tail part of the chuck, and the other end abuts against the inner side face of the groove.
[0015] Compared with the prior art, the beneficial effects of the technical solution of the present application are as follows:
[0016] (1) The strengthening tooling provided in the present application can be installed on any lathe that needs to perform cold rolling strengthening on the transition fillet of the product, combining multiple processes on the same lathe, increasing the functions of the lathe, improving its versatility, and solving the problem in the background technology that after the product is completed on the contour processing machine tool, it still needs to be replaced to another special cold rolling strengthening machine tool and re-clamped, wasting time and having low processing efficiency. It has the effects of reducing operation steps and improving processing efficiency;
[0017] (2) By setting the processing part and the fixing part connected together, the connection angle between the two can be adjusted, so as to adjust the processing angle of the roller blade, enabling the processing of different products, improving the adaptability to different product types, and cold rolling strengthening can be carried out on a variety of products that need to improve the fatigue resistance;
[0018] (3) By setting the locking bolt to snap the chuck into the collet, the chuck can be locked to prevent it from popping out. In cooperation with the spring, it can provide strong support for the chuck and the roller blade during the rolling process of the transition fillet. Since the chuck can still have a certain amount of movement in the collet and the spring can provide elastic buffering force, the impact force on the installation parts fixing this tooling can be greatly reduced, and the wear can be reduced, solving the problem in the background technology that severe vibration will occur during the rolling of the transition fillet, which will generate a large impact force on the rolling R machine tool and increase the wear. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present utility model will be described with reference to the drawings, wherein:
[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0021] Figure 2 is a cross-sectional view of the whole of the present utility model;
[0022] Figure 3 is a structural schematic diagram of the collet of the present utility model;
[0023] Figure 4 is a structural schematic diagram of the fixing part of the present utility model;
[0024] Figure 5 is a cross-sectional view of the chuck of the present utility model.
[0025] Reference numerals: machining part 1, locking bolt 10, collet 11, groove 111, chuck 12, upper clamping piece 121, lower clamping piece 122, roller blade 13, positioning pin 14, copper sheet 15, fixing hole 16, fixing column 17, spring 18, clamping groove 19, fixing part 2, tool shank 21, fixing handle 22, total limiting hole 31, limiting bolt 32, adjusting hole 33, limiting pin 34. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0027] Embodiment 1: As Figures 1 to 5A tooling for cold rolling and strengthening transition fillets, as shown, includes a processing part 1 and a fixing part 2 connected together, forming a "factory" - shaped structure as a whole. The connection angle between the processing part 1 and the fixing part 2 can be adjusted through the limit holes, and then the processing angle of the roller blade 13 can be adjusted. The processing part 1 includes a collet 11 and a chuck 12 fixed inside the collet 11. The chuck 12 is a square chuck 12, which has strong stability and is more likely to meet the connection requirements. The head of the chuck 12 is provided with a roller blade 13, and the roller blade 13 is arranged parallel to the chuck 12. The fixing part 2 is fixedly connected to the lathe. This lathe is a device for making the outer shape of the product, such as a lathe for processing transition fillets on the product. When in use, the chuck 12 of this tooling remains fixed, and the mechanical device on the lathe drives the product with the outer shape made to rotate. This tooling is fixed on the lathe, and the cutting edge of the roller blade 13 is aligned with the transition fillet of the product to roll - press it. The rotation at the transition fillet drives the roller blade 13 to roll at the same time, so as to realize the cold rolling and strengthening of the product with the outer shape processed.
[0028] The strengthening tooling provided in this embodiment can be installed on any lathe that needs to perform cold rolling and strengthening of transition fillets on products. By combining multiple processes on the same lathe, the functions of the lathe are increased, and its versatility is improved. It solves the problem in the background technology that after the product is completed on the outer - shape processing lathe, it still needs to be replaced to another special cold - rolling and strengthening machine tool and re - clamped, which wastes time and has low processing efficiency. It has the effect of reducing operation steps and improving processing efficiency. By setting the processing part 1 and the fixing part 2 connected together, the connection angle between the two can be adjusted, so as to adjust the processing angle of the roller blade 13, and it can process different products, improving the adaptability to different product types. It can perform cold rolling and strengthening on various products that need to improve the fatigue resistance, such as connectors like bolts and rivets. This strengthening tooling can not only be installed on different product outer - shape processing lathes, but also on special cold - rolling and strengthening machine tools to perform cold rolling and strengthening on products that need secondary strengthening of the fatigue resistance of transition fillets.
[0029] Embodiment 2: On the basis of Embodiment 1, a preferred design is carried out on the fixing part 2. The fixing part 2 includes a tool shank 21 and a fixing handle 22 connected integrally. The tool shank 21 is a plate - shaped structure, and the fixing handle 22 is connected below the tool shank 21, and its bottom end is fixedly connected to the universal tool post of the lathe by means of threaded connection. Since on the lathe for processing the outer shape of the product, a tool post needs to be arranged on the main shaft to uniformly install various processing tools, by installing the fixing handle 22 on the universal tool posts of various lathes, this tooling can be conveniently installed on various types of lathes, with strong versatility and wide application.
[0030] Further, a clamping groove 19 is formed at the tail of the jacket 11, and the tool handle 21 is clamped in the clamping groove 19. The limiting holes include a general limiting hole 31 and an adjusting hole 33. One general limiting hole 31 is formed at the relative position of the two side walls of the clamping groove 19, and a corresponding general limiting hole 31 is also formed at the corresponding position on the tool handle 21. The limiting bolt 32 sequentially passes through the general limiting holes 31 to preliminarily fix the tool handle 21 and the jacket 11. A number of adjusting holes 33 with equal quantity are respectively formed at the relative position of the two side walls of the clamping groove 19, and corresponding adjusting holes 33 are also formed at the corresponding position on the tool handle 21. The limiting pin 34 passes through the corresponding adjusting holes 33 to adjust the angle. The actual formed position of the adjusting hole 33 can be set according to the product requirements to be actually processed. In this embodiment, the rotation angle of the fixing part 2 relative to the processing part 1 is not large. Therefore, 4 adjusting holes 33 are formed on each of the two side walls of the clamping groove 19. The 4 adjusting holes 33 and the general limiting hole 31 on the same side wall of the clamping groove 19 are on the same straight line. According to the formed position of the adjusting holes 33 on the clamping groove 19, 4 adjusting holes 33 are also formed at the corresponding position on the tool handle 21. Thus, 4 groups of corresponding adjusting holes 33 are provided. During actual use, each time the limiting pin 34 passes through the corresponding single-group adjusting hole 33, the connection position between the clamping groove 19 and the tool handle 21 can be changed, so as to adjust the connection angle between the processing part 1 and the fixing part 2, and cooperate with the limiting bolt 32 passing through the general limiting hole 31 to fix the tool handle 21 and the jacket 11, ensuring its connection stability. Therefore, by adjusting the cooperation between different adjusting holes 33 and using the limiting pin 34 for positioning, it is possible to meet the requirements for cold rolling the transition fillet of products with different head shapes (such as flat round head, 100° countersunk head, 130° countersunk head, etc.).
[0031] Embodiment 3: On the basis of Embodiment 1, an optimized design is carried out on the roller blade 13. The roller blade 13 is clamped between the upper clamping piece 121 and the lower clamping piece 122 of the chuck 12 and is parallelly connected to both of them. The positioning pin 14 sequentially passes vertically through the upper clamping piece 121, the roller blade 13 and the lower clamping piece 122 to fix the roller blade 13 between the upper clamping piece 121 and the lower clamping piece 122. The roller blade 13 can rotate around the positioning pin 14. Thus, through the fixation of the positioning pin 14, the roller blade 13 can achieve free rotation, which is more conducive to rolling the transition fillet.
[0032] Further, the roller blade 13 is of an annular structure. The positioning pin 14 passes through its inner ring, and its ring body gradually thins from inside to outside, that is, the height of its longitudinal section gradually decreases from inside to outside. The circumferential direction of the roller blade 13 is matched with the shape of the transition fillet, and the edge of its outer ring is smoothly transitioned. This kind of structure can achieve a better rolling effect, the transition fillet can achieve a better strengthening effect, and it can avoid damaging the processed part.
[0033] Furthermore, a copper sheet 15 is connected in parallel between the top surface of the roller blade 13 and the upper clamping piece 121. The copper sheet 15 is clamped between the two. Similarly, a copper sheet 15 is connected in parallel between the bottom surface of the roller blade 13 and the lower clamping piece 122. The copper sheet 15 is clamped between the bottom surface of the roller blade 13 and the lower clamping piece 122. And the two copper sheets 15 are sleeved on the positioning pin 14. The setting of the copper sheet 15 increases the connection stability between the roller blade 13 and the upper clamping piece 121 and the lower clamping piece 122.
[0034] Embodiment 4: On the basis of Embodiment 1, an optimized design is carried out on the connection mode between the chuck 12 and the collet 11. The head of the collet 11 is recessed inward to form a groove 111. The body of the chuck 12 extends into the groove 111 and is in contact with the inner wall of the groove 111 in the circumferential direction and can move back and forth in the groove 111. A fixing hole 16 is opened on the top surface of the head of the collet 11. The fixing hole 16 is a square hole and communicates with the groove 111. The locking bolt 10 passes through the fixing hole 16 and extends into the chuck 12 to clamp the chuck 12 in the groove 111 of the collet 11, and the end of the locking bolt 10 can move back and forth in the fixing hole 16. A fixing column 17 is connected to the tail of the chuck 12. A spring 18 is sleeved on the column body of the fixing column 17. One end of the spring 18 abuts against the end face of the tail of the chuck 12 in the circumferential direction of the fixing column 17, and the other end abuts against the inner side surface of the groove 111. The spring 18 is kept in a compressed state. By setting the locking bolt 10 to clamp the chuck 12 in the collet 11, the chuck 12 can be locked to prevent the chuck 12 from being ejected. And in cooperation with the spring 18, it can provide a strong support for the chuck 12 and the roller blade 13 when rolling the transition fillet. Since the chuck 12 can still have a certain amount of movement in the collet 11 and the spring 18 can provide an elastic buffer force, the impact force on the installation parts fixing this tooling can be greatly reduced, the wear can be reduced, and the problems of severe vibration and large impact force on the rolling R machine tool and increased wear during the rolling of the transition fillet in the background art are solved.
[0035] The above embodiments only represent the specific implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.
Claims
1. A tooling for cold rolling and strengthening transition fillets, characterized in that: It includes a processing part (1) and a fixing part (2) connected together. The connection angle between the processing part (1) and the fixing part (2) can be adjusted through a limiting hole. The processing part (1) includes a collet (11) and a chuck (12) fixed inside the collet (11). A roller blade (13) is provided at the head of the chuck (12), and the roller blade (13) is used for rolling the transition fillet of the product; the fixing part (2) is fixedly connected to the lathe; the fixing part (2) includes a tool shank (21) and a fixing shank (22) integrally connected. A clamping groove (19) is formed at the tail of the collet (11), the tool shank (21) is clamped in the clamping groove (19), and the tail end of the fixing shank (22) is fixed on the universal tool rest of the lathe; the limiting hole includes a total limiting hole (31) and an adjusting hole (33). A total limiting hole (31) and a number of adjusting holes (33) are respectively formed on the side wall of the clamping groove (19) and the tool shank (21). A limiting bolt (32) passes through the total limiting hole (31), and the adjusting holes (33) of the clamping groove (19) and the tool shank (21) correspond one by one. A limiting pin (34) passes through a single group of corresponding adjusting holes (33) to adjust the connection position.
2. The tooling for cold rolling and strengthening the transition fillet according to claim 1, characterized in that: The roller blade (13) is clamped between the upper clamping piece (121) and the lower clamping piece (122) of the chuck (12) and is parallelly connected to both of them. A positioning pin (14) sequentially passes through the upper clamping piece (121), the roller blade (13) and the lower clamping piece (122), and the roller blade (13) can rotate around the positioning pin (14).
3. The tooling for cold rolling and strengthening the transition fillet according to claim 2, characterized in that: The roller blade (13) is of a ring structure, and its ring body gradually becomes thinner from the inside to the outside, and the edge is smoothly transitioned.
4. The tooling for cold rolling and strengthening the transition fillet according to claim 2, characterized in that: A copper sheet (15) is connected between the top surface of the roller blade (13) and the upper clamping piece (121), and a copper sheet (15) is also connected between the bottom surface and the lower clamping piece (122). The copper sheet (15) is sleeved on the positioning pin (14).
5. The tooling for cold rolling and strengthening the transition fillet according to claim 1 or claim 2, characterized in that: The chuck (12) is selected as a square chuck (12).
6. The tooling for cold rolling and strengthening the transition fillet according to claim 1, wherein: The body part of the chuck (12) extends into the groove (111) of the collet (11) and can move back and forth in the groove (111).
7. The tooling for cold rolling and strengthening the transition fillet according to claim 6, characterized in that: A fixing hole (16) is formed on the top surface of the head of the collet (11). A locking bolt (10) passes downward through the fixing hole (16) and extends into the chuck (12) to clamp the chuck (12) in the groove (111), and the end of the locking bolt (10) can move back and forth in the fixing hole (16).
8. The tooling for cold rolling and strengthening transition fillets according to claim 6, characterized in that: A fixing column (17) is connected to the tail of the chuck (12). A spring (18) is sleeved on the column body of the fixing column (17). One end of the spring (18) abuts against the tail end surface of the chuck (12), and the other end abuts against the inner side surface of the groove (111).