Novel hydraulic scraping rolling cutter
By removing the guide wood and setting up the rolling module and the fine tool block immediately adjacent to it, the problems of reduced accuracy and high cost caused by the complex structure of the existing hydraulic scraping rolling tool are solved, and more efficient and accurate processing effects are achieved.
Patent Information
- Application Number
- CN202421228225.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing hydraulic scraping rolling tools have complex structures, resulting in too long tools and the guide wood need to be replaced and corrected regularly, which is prone to cumulative accuracy tolerances and high production costs.
A new type of hydraulic scraping rolling tool was designed, which removes the guide wood and shortens the tool length. It uses a rolling module and a fine knife block arranged immediately adjacently, and synchronous movement between the fine knife and the rolling module is achieved through the drive cylinder.
The tool structure is simplified, the failure rate and assembly cost are reduced, the drive efficiency is improved, and the tolerance accumulation is reduced, and the machining accuracy is improved.
Smart Images
Figure CN222492457U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of deep hole cutters, in particular to a novel hydraulic scraping and rolling cutter. Background Art
[0002] In the field of workpiece inner diameter finishing, scraping tools are usually used to achieve finishing of deep hole inner diameters and cylinder inner diameters, and then the inner diameter surface is further processed by rolling to obtain a high-precision inner diameter surface. In the actual processing process, in order to improve processing efficiency and straightness, the roughing tool, fine tool, and rolling module of the existing hydraulic tool are integrated into one tool. This method avoids the accuracy impact caused by multiple tool changes.
[0003] The above-mentioned integrated rolling tool has a complex structure, which includes a roughing tool, a fine tool, a guide wood and a rolling module. Therefore, the design length of this type of tool is relatively long, and it is also guided by a guide wood. The disadvantages of this design are: 1. The tool is too long, and the fine tool and the rolling module are supported by a guide wood, but the guide wood is a consumable and needs to be replaced regularly. Each replacement requires accuracy calibration, and the use process is cumbersome; 2. Due to the complex structure of the tool, when the tool is processed and assembled, the assembly of multiple workpieces is prone to cumulative tolerances in the tool accuracy, and the accumulated tolerances are likely to cause a reduction in the tool accuracy; 3. The complex structure increases the production cost, which increases the procurement cost for the manufacturer.
[0004] In view of the drawbacks of the existing technology, as a finishing tool production unit, how to improve the technology and design a hydraulic scraping and rolling tool that can adopt a smaller tool length and a simpler assembly structure to completely solve the drawbacks of the existing technology is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content
[0005] The purpose of the utility model is to provide a new type of hydraulic scraping and rolling tool, which can improve the overall structure of the tool, remove the guide wood, set the rolling module and the fine knife block close to each other, shorten the length of the tool, and improve its internal driving device, so that the fine knife block and the rolling module can be synchronously withdrawn under the same driving source.
[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a new type of hydraulic scraping and rolling tool, including an inner core, an end fixing sleeve and a tool holder, a driving hole is arranged at the axis center of the inner core; the tool holder is fixed at the left end of the inner core, and a coarse blade fixing position and a radial fixing hole are arranged on the tool holder, and a fine knife block is fixed in the radial fixing hole; the end fixing sleeve is fixed at the right end of the inner core, and the axis center part of the end fixing sleeve is hollow, and a driving cylinder is arranged between the end fixing sleeve and the inner core, and a fine knife push rod and a ball sleeve push rod are connected to the piston inside the driving cylinder; a tapered inner sleeve is arranged on the periphery of the inner core, and the tapered inner sleeve cooperates with the ball sleeve to realize the fixation of the ball; the ball sleeve push rod is connected to the ball sleeve and drives the ball sleeve to move axially on the inner core; a reset spring is arranged on the piston, and the reset spring is arranged opposite to the oil inlet hole of the piston.
[0007] A plurality of material withdrawal grooves are axially arranged on the outer diameter of the tool holder, and the cutting chips are discharged to the outside through the material withdrawal grooves.
[0008] The rough blade fixing position is arranged on the outer diameter of the cutter head, and there are more than two rough blade fixing positions which are evenly arranged on the outer diameter of the cutter head. Each rough blade fixing position is respectively provided with two blade fixing positions, namely an end blade fixing position and an outer diameter blade fixing position.
[0009] A guide area is arranged between the end fixing sleeve and the ball outer sleeve, a terminal guide groove is fixed on the guide area, and a terminal guide block is fixed in the terminal guide groove.
[0010] The piston is fixed with a fine knife push rod and an end push plate, and the ball jacket push rod is fixed on the end push plate and penetrates the inner core to connect with the ball jacket. When the piston is pressed and moved, the end push plate and the ball jacket push rod can be pushed to drive the ball jacket to move horizontally.
[0011] The beneficial effects of the utility model are as follows: through the above design, the utility model fixes the knife seat at the left end of the inner core, and a rough knife blade and a fine knife block are fixed on the knife seat; the end fixing sleeve is fixed at the right end of the inner core, the axial center of the end fixing sleeve is hollow and a driving cylinder is arranged between the inner core, and a fine knife push rod and a ball jacket push rod are connected to the piston inside the driving cylinder; a tapered inner sleeve is arranged on the periphery of the inner core, and the tapered inner sleeve cooperates with the ball jacket to fix the ball; the ball jacket push rod is connected to the ball jacket and drives the ball jacket to move axially on the inner core; a reset spring is arranged on the piston and is arranged opposite to the piston oil inlet hole. The above structural design is compact, and after removing the guide wood on the periphery, the tool length is shortened, the overall structure is simpler, the components are reduced, and the failure rate is reduced; the cumulative tolerance can also be minimized, and the assembly cost is reduced; its retracting drive structure adopts a linkage mode, which can improve the driving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the front three-dimensional structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the tail end of the utility model;
[0014] Figure 3 It is a schematic diagram of the main structure of the utility model;
[0015] Figure 4 yes Figure 3 Schematic diagram of the AA-direction cross-section structure;
[0016] Figure numerals: 1. end fixing sleeve, 11. cylinder head, 12. piston oil inlet hole, 13. piston, 14. end push plate, 15. ball sleeve push rod, 2. guide area, 21. end guide groove, 3. ball sleeve, 31. ball frame, 32. ball, 4. tool holder, 41. material withdrawal groove, 42. radial fixing hole, 43. tool head, 44. coarse blade fixing position, 45. end blade fixing position, 46. outer diameter blade fixing position, 5. fine knife block, 6. inner core, 61. drive hole, 62. sleeve push rod through hole, 63. right end external thread, 64. left end external thread, 7. tapered inner sleeve, 8. fine knife push rod, 81. thin diameter end, 9. return spring. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be clear that the following embodiments are only exemplary explanations, and directional words such as left and right, inside and outside, etc. may appear in the specific implementation methods. These words do not limit the structure of the utility model, but are only textual descriptions of the specific placement positions in the embodiments, with the purpose of making it easier for those skilled in the art to understand the case. Those skilled in the art can make changes to the various structural details in the embodiments under the guidance of the specification, and such changes should fall within the scope of protection of the claims.
[0018] As shown in the figure, a new type of hydraulic scraping and rolling tool includes an inner core 6, an end fixing sleeve 1 and a tool holder 4. A driving hole 61 is provided at the axis of the inner core 6; the left and right ends of the inner core 6 are respectively provided with a left end external thread 64 and a right end external thread 63. After the external thread is set, the tool holder 4 and the end fixing sleeve 1 can be connected to the left and right threads of the inner core 6 respectively.
[0019] The structural details of the utility model from left to right are as follows: the knife seat 4 is fixed at the left end of the inner core 6, and the knife head 43 of the knife seat 4 is provided with a rough blade fixing position 44 and a radial fixing hole 42, and a fine knife block 5 is fixed in the radial fixing hole 42; further, the rough blade fixing positions 44 are four and are evenly arranged on the outer diameter of the knife head 43. Each rough blade fixing position 44 is respectively provided with two blade fixing positions, the one located at the outer end is the end blade fixing position 45, and the inner one is the outer diameter blade fixing position 46. During rough processing, rough pin processing is realized by the front and rear cooperation of the rough blades in the end blade fixing position 45 and the outer diameter blade fixing position 46.
[0020] Four material return grooves 41 are arranged on the outer diameter of the tool holder 4 , and the material return grooves 41 respectively connect the roughing blade fixing position 44 and the fine cutting blade block 5 , and the debris generated during the roughing and fine machining processes are discharged through the material return grooves 41 .
[0021] The right side of the knife seat 4 is a tapered inner sleeve 7, the inner core 6 is a stepped shaft rotating body, and the tapered inner sleeve 7 is fixed on its periphery; the outer periphery of the inner core 6 is also fixed with a ball outer sleeve 3, and a circle of ball frames 31 are arranged on the ball outer sleeve 3, and a plurality of balls 31 are embedded in the ball frames 31. In the utility model, the ball outer sleeve 3 and the tapered inner sleeve 7 are matched, and the two cooperate inside and outside to achieve the fixation of the balls 31.
[0022] The end fixing sleeve 1 described in the utility model is fixed to the right end of the inner core 6 by threads, the axial center of the end fixing sleeve 1 is hollow, the end fixing sleeve 1 is a stepped cylindrical structure, one end of which is connected to the external pressure supply end, and a driving cylinder is arranged between the other end of the end fixing sleeve 1 and the inner core 6. The driving cylinder described in this embodiment includes a cylinder head 11, a piston oil inlet hole 12 is arranged at the center of the cylinder head 11, a piston 13 and a fine knife push rod 8 are arranged on the left side of the cylinder head 11, and the fine knife push rod is a stepped shaft arrangement, and its thin-diameter end passes through the driving hole 61 and is connected to the inside of the fine knife block 5; an end push plate 14 is fixed to the left side of the piston 13, and three ball jacket push rods 15 are fixed on the end push plate 14 and the three ball jacket push rods 15 are evenly arranged around the axis of the fine knife push rod 8; a jacket push rod through hole 62 is arranged on the inner core 6, and the three ball jacket push rods 15 pass through the jacket push rod through hole 62 and are connected to the ball jacket 3. Through the above structural arrangement, when oil is supplied from the outside, the ball jacket push rod 15 is connected to the ball jacket 3 and drives the ball jacket 3 to move axially on the inner core 6; the piston 13 is provided with a return spring 9, and the return spring 9 is arranged opposite to the piston oil inlet hole 12. When oil is supplied from the outside through the piston oil inlet hole 12, the oil pressure is higher than the elastic force of the return spring 9, and the piston 13, the ball jacket push rod 15, the fine knife push rod 8, and the ball jacket 3 move synchronously, and the fine knife block 5 is driven by external force, and the scraping radius increases; the ball jacket 3 drives the ball 32 to move toward the inclined surface of the tapered inner sleeve 7, and the ball 32 expands outward and squeezes the inner diameter, and the cutting and rolling actions are realized through the above.
[0023] After the scraping and rolling work of the inner hole is completed, the pressure is released, the working radius of the fine knife block 5 is reduced, and the ball 32 is retracted. Since the maximum outer diameters of the fine knife block 5 and the ball 32 are reduced at this time, the hydraulic scraping and rolling tool of the new type can be withdrawn from the processed inner hole without obstacles.
[0024] Furthermore, on the basis of the above structural arrangement, the utility model is also provided with a guide area 2 between the end fixing sleeve 1 and the ball outer sleeve 3, the guide area 1 being the maximum outer diameter protrusion of the stepped inner core 6, and a plurality of end guide grooves 21 being evenly arranged on the outer diameter surface of the guide area 2, and an end guide block being fixed in the end guide groove 21, and the end guide block being used as an auxiliary guide and support, can further improve the stability of the device during processing in a deep hole. This end guide block is small in size, adopts a bolt quick-release structure, and is easy to maintain, and because it is arranged at the end, its influence on the precision can be ignored after the processing is completed.
[0025] To sum up, after the utility model adopts the above design, its structure is compact. After the outer guide wood is removed, the length of the tool is shortened, the overall structure is simpler, the components are reduced, and the failure rate is reduced; the cumulative tolerance can be minimized and the assembly cost is reduced; its tool retraction drive structure adopts linkage, which can improve the drive efficiency.
Claims
1. A new type of hydraulic scraping and rolling tool, characterized by: It includes an inner core, an end fixing sleeve and a knife seat, wherein a driving hole is arranged at the axis center of the inner core; the knife seat is fixed at the left end of the inner core, a coarse knife blade fixing position and a radial fixing hole are arranged on the knife seat, and a fine knife block is fixed in the radial fixing hole; the end fixing sleeve is fixed at the right end of the inner core, the axis center part of the end fixing sleeve is hollow, a driving cylinder is arranged between the end fixing sleeve and the inner core, a fine knife push rod and a ball sleeve push rod are connected to the piston inside the driving cylinder; a tapered inner sleeve is arranged on the periphery of the inner core, and the tapered inner sleeve cooperates with the ball sleeve to fix the ball; the ball sleeve push rod is connected to the ball sleeve and drives the ball sleeve to move axially on the inner core; a reset spring is arranged on the piston, and the reset spring is arranged opposite to the oil inlet hole of the piston.
2. The new hydraulic scraping and rolling tool according to claim 1 is characterized in that : A plurality of material withdrawal grooves are axially arranged on the outer diameter of the tool holder, and the cutting chips are discharged to the outside through the material withdrawal grooves.
3. The new hydraulic scraping and rolling tool according to claim 1 is characterized in that : The coarse blade fixing position is set on the outer diameter of the cutter head, and there are more than two coarse blade fixing positions that are evenly distributed on the outer diameter of the cutter head.
4. The new hydraulic scraping and rolling tool according to claim 3 is characterized in that : Each rough blade fixing position is respectively provided with two blade fixing positions, namely an end blade fixing position and an outer diameter blade fixing position.
5. The new hydraulic scraping and rolling tool according to claim 1 is characterized in that : A guide area is arranged between the end fixing sleeve and the ball outer sleeve, a terminal guide groove is fixed on the guide area, and a terminal guide block is fixed in the terminal guide groove.
6. The new hydraulic scraping and rolling tool according to claim 1 is characterized in that : A fine knife push rod and an end push plate are fixed on the piston, and the ball sleeve push rod is fixed on the end push plate and penetrates the inner core to be connected with the ball sleeve.