CN110744086B - An internal expansion and fitting thin-wall roller clamping device - Google Patents
An internal expansion and fitting thin-wall roller clamping device Download PDFInfo
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- CN110744086B CN110744086B CN201911112796.9A CN201911112796A CN110744086B CN 110744086 B CN110744086 B CN 110744086B CN 201911112796 A CN201911112796 A CN 201911112796A CN 110744086 B CN110744086 B CN 110744086B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
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Abstract
本发明提供了一种内涨贴合式薄壁滚筒夹紧装置，包括芯轴，芯轴上从前往后依次套设有固定顶块、浮动顶块和活动顶块，固定顶块与活动顶块结构相同，且相互对称设置，固定顶块与浮动顶块之间沿圆周方向均布有四个涨紧块，活动顶块与浮动顶块之间沿圆周方向均布有四个涨紧块，涨紧块与固定顶块之间以及涨紧块与活动顶块之间均通过连杆连接。与现有技术相比，本发明的有益效果在于：可在一次装夹定位的情况下完成零件的粗加工和精密加工工序，保证了该零件的尺寸、形状精度和各个尺寸位置公差。
The present invention provides an internal expansion and fitting thin-wall roller clamping device, comprising a mandrel, on which a fixed top block, a floating top block and a movable top block are sleeved in sequence from front to back, the fixed top block and the movable top block have the same structure and are symmetrically arranged, four tensioning blocks are evenly distributed along the circumferential direction between the fixed top block and the floating top block, four tensioning blocks are evenly distributed along the circumferential direction between the movable top block and the floating top block, and the tensioning blocks and the fixed top blocks, as well as the tensioning blocks and the movable top blocks, are connected by connecting rods. Compared with the prior art, the present invention has the beneficial effect that the rough machining and precision machining processes of the parts can be completed in one clamping and positioning, ensuring the size, shape accuracy and various dimensional position tolerances of the parts.
Description
Technical Field
The invention relates to the technical field of precision manufacturing schemes, in particular to an internal expansion laminating type thin-wall roller clamping device.
Background
In the fields of machining and manufacturing industry, food processing industry, grain manufacturing industry, light industry and the like, various industries produce conveyor line equipment, and a plurality of equipment need roller type parts. The parts are generally characterized by large size, thin wall, high dimensional accuracy, high surface finish requirements and high rolling accuracy. Therefore, the general clamping and processing method is difficult to meet the processing requirements and characteristics of the parts, and special clamping and positioning devices are required to be designed for processing and manufacturing different roller parts to meet the processing requirements and characteristics of the roller parts in order to improve the production efficiency, reduce the production cost and achieve the processing precision.
At present, the roller type parts have the characteristics of thin wall, high dimensional accuracy, high surface finish requirements, high rolling accuracy and the like, so repeated clamping and positioning processing is very unfavorable for the manufacturing accuracy of the parts. When the conventional chuck is used for clamping the part, the clamping part interference cannot finish machining once, and the second clamping is needed, so that the precision and the surface quality of the part cannot be guaranteed.
Disclosure of Invention
In order to solve the problems, the invention discloses an internal expansion laminating type thin-wall roller clamping device, which completes rough machining and precision machining procedures of a part under the condition of one-time clamping and positioning, and ensures the size, shape precision and each size and position tolerance of the part.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An internal expansion laminating type thin-wall roller clamping device is characterized in that: the movable jacking block is characterized by comprising a mandrel, wherein a fixed jacking block, a floating jacking block and a movable jacking block are sequentially sleeved on the mandrel from front to back, the fixed jacking block and the movable jacking block are identical in structure and are symmetrically arranged, four tensioning blocks are uniformly distributed between the fixed jacking block and the floating jacking block along the circumferential direction, four tensioning blocks are uniformly distributed between the movable jacking block and the floating jacking block along the circumferential direction, and the tensioning blocks are connected with the fixed jacking block and the tensioning blocks and the movable jacking block through connecting rods; the vertical section of the tensioning block is an isosceles triangle, wherein the surface of the two waists is a tensioning block inclined surface, the surface of the bottom edge is an arc surface, the middle part of the edge of the top angle is provided with a first connecting rod mounting groove to the surface of the bottom edge, the first connecting rod mounting groove is communicated with the two tensioning block inclined surfaces, and the middle parts of the two sides of the tensioning block are symmetrically provided with tensioning block positioning pin holes; the fixed jacking block is of a disc-shaped structure, a through hole matched with the mandrel is formed in the middle of the fixed jacking block along the axial direction, four jacking block inclined planes are uniformly distributed on one side, close to the floating jacking block, of the fixed jacking block along the circumferential direction, the jacking block inclined planes are matched with the tensioning block inclined planes, a second connecting rod mounting groove is formed in the middle of the jacking block inclined planes, and second connecting rod fixing pin holes are symmetrically formed in the middle of two sides of the second connecting rod mounting groove; the floating roof block is of a cylindrical structure, a through hole matched with the mandrel is formed in the middle of the floating roof block along the axial direction, four floating roof block inclined planes are uniformly distributed at the end part of the floating roof block along the circumferential direction, and the floating roof block inclined planes are matched with the tensioning block inclined planes; the connecting rod waist circular groove and the first connecting rod fixing pin hole are respectively formed in two ends of the side face of the connecting rod, the first connecting rod fixing pin hole is connected with the second connecting rod fixing pin hole through a connecting rod fixing pin, and the connecting rod waist circular groove is connected with the tensioning block locating pin hole through a tensioning block fixing pin.
Further, a mandrel positioning boss is arranged on the front section of the mandrel, an external thread is arranged on the rear section, a mandrel jacking hole is formed in the end face of the middle of the rear end, and the mandrel positioning boss abuts against the front end of the fixed jacking block.
Further, a washer and a nut which are arranged front and back are sleeved on the rear section of the mandrel, the washer abuts against the rear end of the movable ejector block, and the nut is in threaded connection with the rear section of the mandrel.
Further, the outer parts of the eight tensioning blocks are matched and provided with thin-wall roller parts.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention is in a mode of clamping one top when in use, which can most ensure the machining precision of parts in the mechanical manufacturing process, and can be used on different equipment in a turnover way, thereby avoiding the accumulated error in the machining process;
2. the screw thread is used as axial thrust, and the thrust is stable, reliable and adjustable;
3. The axial thrust is converted into radial thrust through the inclined plane, so that the structure is clear and stable;
4. the tensioning block adopts two symmetrically arranged inclined planes, so that the radial movement of the tensioning block is ensured to be reliable, stable and consistent;
5. The arc surface of the tensioning block is identical with the arc of the inner surface of the thin-wall roller part, the tensioning block is completely attached during tensioning, the most stable attaching force is ensured, meanwhile, the thin-wall roller part is not deformed due to surface contact, and the precision of the part machining process is effectively controlled;
6. The vertical section of the tensioning block is isosceles triangle, and the radial movement distance from the initial position to the tensioning position is large, so that the device can be expanded to be used for a thin-wall roller with edge reinforcing ribs at the roller mouth;
7. One end of the connecting rod connected with the tensioning block is of a waist round groove structure, and a fixing pin of the tensioning block can slide in the groove when the tensioning block moves radially, so that the tensioning block can smoothly complete radial movement and the connecting rod can swing in an arc manner;
8. when the roller parts are longer, the number of floating ejector blocks and tensioning blocks can be increased, the combination and the extension are convenient, the principle and the technology are unchanged, and the hardware extension is easy to realize.
Drawings
FIG. 1 is a schematic view of an internal expansion fitting type thin-walled cylinder clamping device of the present invention.
Fig. 2 is a schematic structural view of an internal expansion fitting type thin-wall roller clamping device of the invention.
Fig. 3 is a schematic structural view of a tensioning block in the internal-tensioning fitting type thin-wall roller clamping device.
Fig. 4 is a schematic structural view of a fixing top block in an internal expansion fitting type thin-wall roller clamping device.
FIG. 5 is a schematic view of the structure of a floating roof block in an inner expansion fitting type thin-walled cylinder clamping device according to the present invention.
FIG. 6 is a schematic view of the structure of a connecting rod in an internal expansion fitting type thin-walled cylinder clamping device according to the present invention.
FIG. 7 is a schematic diagram showing the connection of a fixed top block and a tensioning block in an internal expansion fitting type thin-wall roller clamping device.
Fig. 8 is a schematic structural view of a mandrel in an internal expansion fitting type thin-wall roller clamping device.
FIG. 9 is a schematic illustration of an internal expansion fitting type thin-walled cylinder clamping device of the present invention in operation.
List of reference numerals:
The clamping device comprises a 1-mandrel, a 11-mandrel positioning boss, a 12-mandrel jacking hole, a 2-fixed jacking block, a 21-second connecting rod fixing pin hole, a 22-jacking block inclined plane, a 23-second connecting rod mounting groove, a 3-tensioning block, a 31-tensioning block inclined plane, a 32-tensioning block positioning pin hole, a 33-first connecting rod mounting groove, a 4-floating jacking block, a 41-floating jacking block inclined plane, a 5-movable jacking block, a 6-gasket, a 7-nut, an 8-connecting rod fixing pin, a 9-connecting rod, a 91-connecting rod waist round groove, a 92-first connecting rod fixing pin hole, a 10-tensioning block fixing pin, a 13-thin-wall roller part, a 14-center and a 15-main shaft clamping mechanism.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in the figure, the internal expansion laminating thin-wall roller clamping device comprises a mandrel 1, wherein a fixed ejector block 2, a floating ejector block 4 and a movable ejector block 5 are sequentially sleeved on the mandrel 1 from front to back, the fixed ejector block 2 and the movable ejector block 5 are identical in structure and are symmetrically arranged, four expansion blocks 3 are uniformly distributed between the fixed ejector block 2 and the floating ejector block 4 along the circumferential direction, four expansion blocks 3 are uniformly distributed between the movable ejector block 5 and the floating ejector block 4 along the circumferential direction, and the expansion blocks 3 are connected with the fixed ejector block 2 and the expansion blocks 3 and the movable ejector block 5 through connecting rods 9; the vertical section of the tensioning block 3 is an isosceles triangle, wherein the surface of the two waists is a tensioning block inclined surface 31, the surface of the bottom edge is an arc surface, the middle part of the edge of the top angle is provided with a first connecting rod mounting groove 33 towards the surface of the bottom edge, the first connecting rod mounting groove 33 is communicated with the two tensioning block inclined surfaces 31, and the middle parts of the two sides of the tensioning block 3 are symmetrically provided with tensioning block positioning pin holes 32; the fixed ejector block 2 is of a disc-shaped structure, a through hole matched with the mandrel 1 is formed in the middle of the fixed ejector block along the axial direction, four ejector block inclined planes 22 are uniformly distributed on one side, close to the floating ejector block 4, of the fixed ejector block 2 along the circumferential direction, the ejector block inclined planes 22 are matched with the tensioning block inclined planes 31, a second connecting rod mounting groove 23 is formed in the middle of the ejector block inclined planes 22, and second connecting rod fixing pin holes 21 are symmetrically formed in the middle of two sides of the second connecting rod mounting groove 23; the floating roof block 4 is of a cylindrical structure, a through hole matched with the mandrel 1 is formed in the middle of the floating roof block along the axial direction, four floating roof block inclined planes 41 are uniformly distributed at the end part of the floating roof block 4 along the circumferential direction, and the floating roof block inclined planes 41 are matched with the tensioning block inclined planes 31; the two ends of the side surface of the connecting rod 9 are respectively provided with a connecting rod waist circular groove 91 and a first connecting rod fixing pin hole 92, the first connecting rod fixing pin hole 92 is connected with the second connecting rod fixing pin hole 21 through a connecting rod fixing pin 8, and the connecting rod waist circular groove 91 is connected with a tensioning block positioning pin hole 32 through a tensioning block fixing pin 10. The arc surface of the tensioning block 3 is consistent with the arc of the inner wall of the thin-wall roller part 13, so that the arc surface is effectively guaranteed to be completely attached during working.
In this embodiment, a mandrel positioning boss 11 is provided on the front section of the mandrel 1, an external thread is provided on the rear section, a mandrel jack hole 12 is provided in the middle of the rear end, and the mandrel positioning boss 11 abuts against the front end of the fixed jack block 2.
In this embodiment, the rear section of the mandrel 1 is further sleeved with a washer 6 and a nut 7, which are disposed front and back, the washer 6 abuts against the rear end of the movable top block 5, and the nut 7 is in threaded connection with the rear section of the mandrel 1.
In the embodiment, the thin-wall roller parts 13 are arranged outside the eight tensioning blocks 3 in a matched mode.
The working principle of the invention is as follows: when the parts are initially machined, the front end of the mandrel 1 of the device is clamped by a machine tool spindle clamping mechanism 15, the thin-wall roller part 13 is sleeved into the internal expansion joint type thin-wall roller clamping device, the nut 7 is screwed, under the action of threads, the nut 7 pushes the movable ejector block 5 and the floating ejector block 4 to axially move, under the action of the ejector block inclined planes of the movable ejector block 5 and the floating ejector block 4, the tension block 3 is pushed out by the tension block inclined planes 31 to radially move the tension block 3 until the workpieces are tensioned, the center 14 concentric with the machine tool spindle is used for supporting the mandrel center hole 12, after the initial rough machining is finished, the thin-wall roller part is taken down together with the clamping device and is put into a finishing machine tool for direct use, so that repeated positioning and clamping for more than two times are avoided, and switching among different precise machining procedures can be ensured under the conditions of safety and stability and machining precision.
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (2)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911112796.9A CN110744086B (en) | 2019-11-14 | 2019-11-14 | An internal expansion and fitting thin-wall roller clamping device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911112796.9A CN110744086B (en) | 2019-11-14 | 2019-11-14 | An internal expansion and fitting thin-wall roller clamping device |
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| Publication Number | Publication Date |
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| CN110744086A CN110744086A (en) | 2020-02-04 |
| CN110744086B true CN110744086B (en) | 2024-11-26 |
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| CN111230165A (en) * | 2020-03-09 | 2020-06-05 | 苏州市职业大学 | A special-shaped thin-walled parts fastening mechanism |
| CN111390198B (en) * | 2020-06-08 | 2020-09-04 | 烟台工程职业技术学院(烟台市技师学院) | Numerical control lathe fixture for thin-wall parts |
| CN111992750B (en) * | 2020-08-26 | 2021-07-30 | 常州机电职业技术学院 | A wedge-type external expansion lathe fixture with an aluminum piston outer circle |
| CN112428145B (en) * | 2020-10-26 | 2021-12-07 | 宁夏天地奔牛实业集团有限公司 | Thin-wall sleeve part clamping and positioning device |
| CN112475754A (en) * | 2020-10-30 | 2021-03-12 | 哈尔滨哈飞航空工业有限责任公司 | Accurate inner mold positioning device for large-size cylindrical thin-walled part |
| CN113333556B (en) * | 2021-06-02 | 2023-01-10 | 上海交通大学 | Spinning mold for spherical part with ring rib at port and spinning method thereof |
| CN114850926A (en) * | 2022-05-26 | 2022-08-05 | 威伊艾姆电机(中国)有限公司 | Tooling for processing excircle of stator core with winding of rib external cooling motor |
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| CN210908169U (en) * | 2019-11-14 | 2020-07-03 | 苏州市职业大学 | Internal-expansion laminating type thin-wall roller clamping device |
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