CN209867466U - Manufacturing tool for structural member connecting hole - Google Patents
Manufacturing tool for structural member connecting hole Download PDFInfo
- Publication number
- CN209867466U CN209867466U CN201920539098.6U CN201920539098U CN209867466U CN 209867466 U CN209867466 U CN 209867466U CN 201920539098 U CN201920539098 U CN 201920539098U CN 209867466 U CN209867466 U CN 209867466U
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- cutter body
- connecting hole
- diameter
- drill bit
- structural member
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Abstract
The utility model discloses a manufacturing tool of structure connecting hole, including multi-functional drill bit and the backing plate that is used for bearing structure spare, multi-functional drill bit is including the first cutter body, second cutter body, third cutter body and the friction extrusion body that connect gradually, the diameter of first cutter body, second cutter body, third cutter body increases in proper order, the diameter of friction extrusion body is greater than the aperture of third cutter body, and it is right to be used for the connecting hole produces the extrusion magnitude of interference. The utility model discloses utilize first cutter body, second cutter body, third cutter body and the friction extrusion body that increases one by one, the gradient design of three cutter body produces the connecting hole that the aperture is less than the predetermined value on the connecting piece, the diameter of the friction extrusion body is greater than the aperture of third cutter body, and it is right to be used for the connecting hole produces the extrusion magnitude of interference for the connecting hole intensity of formation is bigger.
Description
Technical Field
The utility model belongs to the technical field of the manufacturing of connecting hole and specifically relates to a manufacturing tool of structure connecting hole is related to.
Background
In the field of industrial application of aviation, aerospace, trains, ships and the like, structural member connecting parts are often subjected to a large dynamic load, particularly, fatigue cracks are easy to occur on connecting parts such as riveting and the like based on connecting holes, and the hole cracks of the connecting holes caused by the fatigue cracks become a main form of structural failure. Therefore, the manufacturing method of the connecting hole is optimized, and the improvement of the service reliability of the connecting piece has important value and significance.
In China, the processing of the connecting holes of the structural members is mainly realized by the steps of drilling, reaming, hole extrusion and the like. The purpose of drilling and reaming is to roughly machine a connecting hole with the required specification and aperture size, in the process, the existence of the connecting hole enables the integrity of the base material to be damaged, and stress concentration can easily occur around the connecting hole due to the protrusion after the inner wall of the hole is machined. Reaming is mainly to carry out finish machining on the connecting hole after drilling and reaming so as to obtain the inner wall of the connecting hole with required surface roughness, reduce stress concentration and improve the quality of the connecting hole; however, machining still leaves cutting marks on the inner wall of the hole, which, if not eliminated, can adversely affect the quality of the joint hole. The purpose of hole extrusion is to eliminate the traces left by the reamer mechanical processing, and the inner side of the hole wall is subjected to elastic-plastic deformation through a round bar with the diameter slightly larger than that of the connecting hole in the connecting hole, so that residual compressive stress is introduced to a certain degree, and the purposes of improving the fatigue performance and stress corrosion resistance of the inner side of the hole wall are achieved.
The processing and strengthening processes are distributed in the processing process of the existing connecting hole, so that the processing period is prolonged, manpower and material resources are consumed, the processing precision is difficult to guarantee between one processing method and the next processing method, the quality of the final connecting hole is adversely affected, and the problems of long processing period, low production efficiency, unstable precision, resource consumption and the like are caused.
SUMMERY OF THE UTILITY MODEL
To the deficiency among the prior art, the utility model provides a manufacturing tool of structure connecting hole.
The utility model adopts the technical proposal that: the utility model provides a manufacturing tool of structure connecting hole, includes multi-functional drill bit and the backing plate that is used for the supporting structure spare, multi-functional drill bit is including the first cutter body, second cutter body, third cutter body and the friction extrusion body that connect gradually, the diameter of first cutter body, second cutter body, third cutter body increases in proper order for produce the connecting hole that the aperture is less than the predetermined value on the connecting piece, the diameter of friction extrusion body is greater than the aperture of third cutter body, is used for to the connecting hole produces the extrusion magnitude of interference.
Preferably, the friction extrusion body consists of a cylinder and a circular truncated cone, and the height of the cylinder is greater than the depth of the connecting hole.
Preferably, the multifunctional drill bit further comprises a pressing shoulder connected with the multifunctional drill bit, and the multifunctional drill bit and the pressing shoulder are connected in an integrated mode or in a split mode.
Preferably, when the multifunctional drill bit and the press shoulder are integrally connected, the press shoulder and the multifunctional drill bit are connected together in an integral forming or welding mode.
Preferably, when the multifunctional drill bit is connected with the press shoulder in a split mode, a handle part is processed at one end of the multifunctional drill bit, and a round hole for the handle part to stretch into is formed in the center of the lower end of the press shoulder.
Preferably, the diameter of the first cutter body ranges from 3mm to 100mm, and the height of the drill bit ranges from 8mm to 50 mm; the diameter of the second cutter body is larger than that of the first cutter body, the range is 3-107mm, and the height of the second cutter body is the same as that of the first cutter body; the diameter of the third cutter body is larger than that of the second cutter body, the range of the third cutter body is 3-109mm, and the height of the third cutter body is the same as that of the first cutter body; the diameter range of the cylinder of the friction extrusion body is 3-110mm, the curvature radius range of the circular table of the friction extrusion body is 10-1000mm, and the height range of the circular table is 3-200 mm; the roughness Ra of the side surface of the friction extrusion body is less than or equal to 0.2 mu m.
The utility model has the advantages and the beneficial effects that: the utility model discloses utilize first cutter body, second cutter body, third cutter body and the friction extrusion body that increases one by one, the gradient design of three cutter body produces the connecting hole that the aperture is less than the predetermined value on the connecting piece, the diameter of the friction extrusion body is greater than the aperture of third cutter body, and it is right to be used for the connecting hole produces the extrusion magnitude of interference, and the mechanical vestige of connecting hole inner wall disappears under this magnitude of interference, and the pore wall is reinforceed for the connecting hole intensity of formation is bigger.
The utility model discloses still realized collection drilling, reaming, finish machining and reinforceed in the manufacturing of the structure connecting hole of an organic whole, reduced the processing step, practiced thrift the resource, improved efficiency, the cost is reduced.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic structural view of the present invention;
fig. 3 is a schematic view showing a specific processing state of the manufacturing tool for the connection hole.
Detailed Description
The following embodiments are described in detail with reference to the accompanying drawings and examples, and the following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the scope of the present invention.
As shown in fig. 1-2, the tool for manufacturing the connecting hole of the structural member of the present invention comprises a shoulder press, a multifunctional drill, and a backing plate, and the schematic three-dimensional structure thereof is shown in fig. 1. Fig. 2 is a schematic structural view showing the integral connection of the pressure shoulder and the multifunctional drill, wherein I is the pressure shoulder which is formed by concentrically and integrally forming a cylinder 11 and a circular truncated cone 12, the diameter of the cylinder 11 is D1, the range is 8-400mm, the height is H1, and the range of the cone angle theta is 5-90 degrees; the lower end surface of the circular truncated cone 12 is a plane or is provided with a groove.
The multifunctional drill bit II comprises four parts, namely a friction extrusion body 21, a third cutter body 22, a second cutter body 23 and a first cutter body 24, wherein the diameters of the four parts are D3, D4, D5 and D6 respectively; the heights of the first cutter body 24, the second cutter body 23 and the third cutter body 22 are H6, H5 and H4 respectively; the friction extrusion body consists of a cylinder 211 with the diameter of D3 and a circular table 212 with the diameter of D4 at the lower bottom surface, and the heights of the cylinder and the circular table are H2 and H3 respectively; the range of the curvature radius R of the generatrix of the circular truncated cone 212 is 10-1000 mm. First cutter body 24 and second cutter body 23, realize smooth transition through the transition fillet that radius R is 0.5 ~ 10mm between second cutter body 23 and the third cutter body 22, the diameter of the last bottom surface of round platform 212 equals the cylinder bottom surface diameter that connects, and the diameter of lower bottom surface equals the third cutter body 22 diameter that connects, and generating line and bottom surface contained angle are theta, and its angle is 120. The multifunctional drill bit is arranged in the center of the lower part of the shoulder pressing circular truncated cone 12; the multifunctional drill bit and the pressure shoulder are designed in an integrated mode or in a split mode.
The multifunctional drill bit and the pressure shoulder of the utility model are connected in an integrated manner or in a split manner, and when the multifunctional drill bit and the pressure shoulder are designed in a concentric integrated manner, the multifunctional drill bit and the pressure shoulder can be connected by integrated molding or welding and other connection technologies; relative motion between the two parts can not occur, and when the pressure shoulder rotates, presses down, translates and the like, the multifunctional drill bit also can synchronously rotate, press down, translate and the like.
When the multifunctional drill bit and the pressure shoulder are designed in a concentric split mode, the diameter range of the round hole in the pressure shoulder is 3-100 mm. One end of the multifunctional drill bit is provided with a handle part, an axial round hole for the handle part of the multifunctional drill bit to enter is processed in the center of the press shoulder, and clearance fit is realized between the axial round hole and the axial round hole; when the multifunctional drill bit rotates, presses down, translates and the like, the pressure shoulder can be static or rotate, press down, translate and the like at different speeds.
The combined parts of the multifunctional drill bit may be a first cutter body 24, a second cutter body 23, a third cutter body 22 and a friction pressing body 21; or the first cutter body 24, the third cutter body 22 and the frictional pressing body 21.
The first cutter body 24 in the multifunctional drill bit is mainly used for drilling holes, the diameter range of the multifunctional drill bit is 3-100mm, and the height range of the multifunctional drill bit is 8-50 mm; for workpieces that do not reach the desired hole diameter, the second cutter 23 may be used to ream a hole having a diameter greater than the diameter of the first cutter 24, in the range of 3-107mm, and a height equal to the height of the first cutter 24.
The third cutter body 22 of the multifunctional drill bit is mainly used for carrying out finish machining on the machined hole wall so as to achieve the required surface roughness, the diameter of the third cutter body is 0.5-2mm wider than that of the second cutter body 23, the range of the third cutter body is 3-109mm, and the height of the third cutter body is the same as that of the first cutter body 24.
The multifunctional drill bit friction extrusion body 21 is mainly used for extruding and strengthening the processed hole wall and consists of a cylinder 211 and a circular truncated cone 212, wherein the diameter range of the cylinder 211 is 3-110mm, and the height of the cylinder 211 is 1-50mm larger than the depth of a connecting hole; the generatrix of the circular truncated cone 212 is a circular arc, the curvature radius range is 10-1000mm, and the height range of the circular truncated cone is 3-200 mm; the roughness Ra of the side surface of the friction extrusion body is less than or equal to 0.2 mu m. The interference extrusion of the friction extrusion body is utilized, so that the strength of the connecting hole is increased.
The structural part to be processed is placed on a backing plate, a round hole is formed in the middle of the backing plate, the diameter of the round hole is larger than the maximum diameter of the multifunctional drill bit, the diameter range is 3-110mm, and the thickness of the backing plate is 5-250 mm; the upper surface of the backing plate is processed into a plane.
Fig. 3 shows a specific process of manufacturing the connecting hole manufacturing tool. Before processing, firstly, positioning and centering are needed, a structural member mother board is placed on a base plate, the round hole in the base plate and the position of a pre-processing connecting hole in the mother board are concentric, the structural member mother board and the base plate are pressed and fixed, then a manufacturing tool of the connecting hole is aligned to the position of the pre-processing connecting hole in the structural member mother board, and the positions of the connecting hole manufacturing tool, the pre-processing connecting hole and the axis of the center of the base plate are enabled to coincide.
And then, the connecting hole manufacturing tool is operated at the set rotating speed and the set downward moving speed until the first cutter body contacts the structural member base material, the connecting hole manufacturing tool starts to punch, the rotating speed of the connecting hole manufacturing tool is 100 plus 1000rpm, and the downward moving speed is 0.1-2 mm/s. And after the first cutter body completely enters the connecting hole, the second cutter body 23 and the third cutter body 22 sequentially enter the connecting hole for reaming and reaming, and finally the friction extrusion body 21 enters the connecting hole for extrusion reinforcement under the condition of extrusion interference of 0.02-1 mm.
And after the friction extrusion body completely passes through the workpiece, the pressing shoulder reaches the surface of the structural part, the connecting hole manufacturing tool stops moving downwards, the rotation is kept for 2-5s, then the connecting hole manufacturing tool is pulled out from the hole along the axial direction at the speed of 0.3-2mm/s, and at the moment, the pressing shoulder is separated from the surface of the structural part immediately.
In the drilling and strengthening stages of the connecting hole manufacturing tool, the multifunctional drill bit keeps the same rotating speed and downward moving speed from the beginning of drilling to the end of strengthening, and different rotating speeds and downward moving speeds can be set according to the condition that different parts of the multifunctional drill bit enter the connecting hole.
The diameter D6 of the first cutter body 24 of the utility model is 2-10mm smaller than the aperture of the connecting hole, the height H6 of the first cutter body can be 1-8mm smaller than the thickness of the workpiece, the diameter D5 of the second cutter body 23 is 1-3mm smaller than the aperture of the connecting hole, and the height H5 is equal to the height H6 of the first cutter body 24; the diameter D4 of the third cutter body 22 is 0.5-1mm smaller than the aperture of the connecting hole, and the height H4 is equal to the height H6 of the first cutter body; the diameter D3 of the friction extrusion body is equal to the standard aperture of the connecting hole.
The hardness of the shoulder pressing I, the multifunctional drill bit II and the cushion plate material of the utility model is higher than that of the connecting hole of the structural member; the material of the press shoulder I, the material of the multifunctional drill bit II and the material of the backing plate are tool steel, nickel-based high-temperature alloy, drill-based high-temperature alloy, high-melting-point metal, carbide and metal-based composite material, and the three materials can be homogeneous materials or heterogeneous materials.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (6)
1. A manufacturing tool of a structural member connecting hole is characterized in that: the multifunctional drill bit comprises a first cutter body, a second cutter body, a third cutter body and a friction extrusion body which are sequentially connected, the diameters of the first cutter body, the second cutter body and the third cutter body are sequentially increased, the diameter of the first cutter body, the diameter of the second cutter body and the diameter of the third cutter body are used for generating a connecting hole with the diameter smaller than a preset value on the connecting piece, and the diameter of the friction extrusion body is larger than the diameter of the third cutter body and is used for generating extrusion interference magnitude on the connecting hole.
2. The tool for manufacturing a structural member connecting hole according to claim 1, wherein: the friction extrusion body is composed of a cylinder and a circular truncated cone, and the height of the cylinder is larger than the depth of the connecting hole.
3. The tool for manufacturing a structural member connecting hole according to claim 1, wherein: the multifunctional drill bit is connected with the pressure shoulder in an integrated or split mode.
4. The tool for manufacturing a structural member connecting hole according to claim 3, wherein: when the multifunctional drill bit and the press shoulder are integrally connected, the press shoulder and the multifunctional drill bit are connected together in an integral forming or welding mode.
5. The tool for manufacturing a structural member connecting hole according to claim 3, wherein: when the multifunctional drill bit is connected with the press shoulder in a split mode, a handle part is processed at one end of the multifunctional drill bit, and a round hole for the handle part to stretch into is formed in the center of the lower end of the press shoulder.
6. The tool for manufacturing a structural member connecting hole according to claim 2, wherein: the diameter range of the first cutter body is 3-100mm, and the height range of the drill bit is 8-50 mm; the diameter of the second cutter body is larger than that of the first cutter body, the range is 3-107mm, and the height of the second cutter body is the same as that of the first cutter body; the diameter of the third cutter body is larger than that of the second cutter body, the range of the third cutter body is 3-109mm, and the height of the third cutter body is the same as that of the first cutter body; the diameter range of the cylinder of the friction extrusion body is 3-110mm, the curvature radius range of the circular table of the friction extrusion body is 10-1000mm, and the height range of the circular table is 3-200 mm; the roughness Ra of the side surface of the friction extrusion body is less than or equal to 0.2 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539098.6U CN209867466U (en) | 2019-04-19 | 2019-04-19 | Manufacturing tool for structural member connecting hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539098.6U CN209867466U (en) | 2019-04-19 | 2019-04-19 | Manufacturing tool for structural member connecting hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209867466U true CN209867466U (en) | 2019-12-31 |
Family
ID=68961052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920539098.6U Expired - Fee Related CN209867466U (en) | 2019-04-19 | 2019-04-19 | Manufacturing tool for structural member connecting hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209867466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039092A (en) * | 2019-04-19 | 2019-07-23 | 东北大学秦皇岛分校 | A kind of the manufacture tool and manufacturing method of structural member connecting hole |
-
2019
- 2019-04-19 CN CN201920539098.6U patent/CN209867466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039092A (en) * | 2019-04-19 | 2019-07-23 | 东北大学秦皇岛分校 | A kind of the manufacture tool and manufacturing method of structural member connecting hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 Termination date: 20210419 |