CN202498243U - Screwed hole processing tool for thin walled tube fitting - Google Patents
Screwed hole processing tool for thin walled tube fitting Download PDFInfo
- Publication number
- CN202498243U CN202498243U CN2011205316676U CN201120531667U CN202498243U CN 202498243 U CN202498243 U CN 202498243U CN 2011205316676 U CN2011205316676 U CN 2011205316676U CN 201120531667 U CN201120531667 U CN 201120531667U CN 202498243 U CN202498243 U CN 202498243U
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- drilling tool
- hole
- screwed hole
- tool
- cone
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Abstract
The utility model discloses a screwed hole processing tool for a thin walled tube fitting. The processing tool is a drilling tool for processing a screwed bottom hole on the thin walled tube fitting. A rear end of the drilling tool is a clamping segment, a front end of the drilling tool is a cone. A cylindrical sizing segment is arranged coaxially after the cone, and the sizing segment and the screwed bottom hole have a same diameter dimension. By utilizing a technical scheme above, and a specially-produced edge-less drilling tool is used, pressure on a surface of the tube fitting is raised under high rotation speed, and a processing area is softened by frictional heat to form a hole on a tube wall, and the hole has a same shape with the edge-less drilling tool. The hole, namely the needed screwed bottom hole, has greater thickness than that of the tube wall caused by squeezing during molding, and length of the screwed bottom hole is increased. As the number of screw teeth is increased, locking force of a self-tapping screw is increased, and connection reliability of the self-tapping screw is improved.
Description
Technical field
The utility model belongs to the technical field of manufacturing technology and equipment, relates to the technology of auto parts and components processing, and more particularly, the utility model relates to a kind of thin-wall pipe upper screwed hole machining tool.
Background technology
At present, it is a thin-wall pipe that the fascia crossbeam is responsible for (pipe or square tube), and general wall thickness t is about 1.5～2mm.Shown in Figure 1 as in this Figure of description installed other part on pipe fitting 2, adopt tapping screw to fix, and the tapping screw general requirements is M4～M6.
The bottom outlet that tapping screw is used, its diameter d 1 is φ 3.3mm～φ 5mm, and the thickness in its hole equals the wall thickness t of pipe, and present processing method is to use the spiral spiral bit, adopts the method for drilling to process.Promptly on pipe fitting, get out thread Pilot hole, adopt tapping screw to attack the system screw thread and realize fastening.
The shortcoming that above-mentioned prior art exists is:
Owing to be thin-wall pipe, the thickness in hole is exactly the wall thickness of pipe fitting, and (general pitch is 0.5～1mm) to the screw thread of tapping screw tapping about 2～3 buttons like this.Because the tooth button that is screwed into is few, vehicle in the process of moving, the vibrations of generation come loose the tapping screw shake often, cause Auto Instrument desk to produce abnormal sound, influence going of automobile.
The utility model content
The utility model problem to be solved provides a kind of thin-wall pipe upper screwed hole machining tool, and its objective is increases the reach that tapping screw connects, and strengthens the reliability that connects.
To achieve these goals, the technical scheme taked of the utility model is:
The thin-wall pipe upper screwed hole machining tool that the utility model provided; Described machining tool is the drilling tool of the thread Pilot hole on the described pipe fitting of processing; The rear end of described drilling tool is a clamp segment; The front end of described drilling tool is a cone, after the described cone for coaxial line, be shaped as columniform land, the diameter dimension of described land is identical with described screwed hole bottom diameter.
The material of described drilling tool is a carbide alloy, perhaps is ceramic cutting tool material.
Described screwed hole bottom diameter is 3.3mm～5mm.
The tapering of described cone is 30 °～40 °, and the vertex of a cone of described cone is the bulb of diameter less than 0.5mm.
Be the outwards round platform of protrusion of diametric(al) between described clamp segment and the land, the step plane at the two ends of described round platform is perpendicular to the axis of drilling tool.
On the whole taper seat of described cone, be provided with protruding prismatic according to its generatrix direction.
The utility model also provides the processing method of above-described thin-wall pipe upper screwed hole machining tool, and its goal of the invention is identical with technique scheme.The technical scheme of this processing method is:
With described drilling tool, be fixedly mounted on the drill press spindle chuck at a high speed through clamp segment;
Described pipe fitting is fixed;
Start drilling machine, drilling tool is applied certain axial compressive force, drilling tool is acted on the surface of pipe fitting through drilling machine;
Drilling tool rotate at a high speed and the effect of axial compressive force under, drilling tool and pipe fitting friction, fricative heat makes the zone that contacts with drilling tool on the pipe fitting softening;
Under the extruding of drilling tool certain pressure, the tube wall of the pipe fitting after softening forms nest dress hole;
Along with moving down of drilling tool, on the tube wall of pipe fitting, form and the consistent hole of drilling tool land shape;
Step plane extruding on drilling tool swells the metal of tube wall face, causes the step plane that forms protrusion tube wall 0.8mm～1.2mm, and at this moment, the thread Pilot hole of lengthening wall thickness, height forms.
The utility model adopts technique scheme, with special no cutting drill spot facing cutter, under rotating at a high speed; On the pipe fitting surface, pressurize, frictional heat makes machining area softening, makes on the tube wall to form and the consistent hole of no cutting drill spot facing cutter shape; It is required thread Pilot hole; This hole has increased the length of thread Pilot hole because the extruding during moulding makes the thickness in hole will thicken than pipe thickness.Because thread button number increases, increased the coupling mechanism force of tapping screw, strengthened the connection reliability of tapping screw.
Description of drawings
The mark of facing down among expressed content of each width of cloth accompanying drawing of this specification and the figure briefly explains:
Fig. 1 is the described structural representation of this specification background technology part;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the structural representation of the drilling tool in the utility model;
Fig. 4 is in the processing of the utility model, component shaping process sketch map.
Be labeled as among the figure:
1, drilling tool, 2, pipe fitting, 3, cone, 4, land, 5, clamp segment, 6, round platform.
The specific embodiment
Contrast accompanying drawing below; Through description to embodiment; The specific embodiment of the utility model as doing further detailed explanation, there is more complete, accurate and deep understanding to help those skilled in the art to inventive concept, the technical scheme of the utility model.
Like the structure of the expressed the utility model of Fig. 3, be a kind of thin-wall pipe upper screwed hole machining tool, described machining tool is the drilling tool 1 of the thread Pilot hole on the described pipe fitting 2 of processing, the rear end of described drilling tool 1 is a clamp segment 5.
In order to solve the problem that exists at the described present known technology of this specification background technology part and to overcome its defective, realize increasing the reach that tapping screw connects, strengthen the goal of the invention of the reliability that connects, the technical scheme that the utility model is taked is:
As shown in Figures 2 and 3; The thin-wall pipe upper screwed hole machining tool that the utility model provided; The front end of described drilling tool 1 is a cone 3; After the described cone 3 for coaxial line, be shaped as columniform land 4, the diameter dimension of described land 4 is identical with described screwed hole bottom diameter.
The utility model increases the thread Pilot hole height through technique scheme, increases the reach that tapping screw connects, and strengthens the connection reliability of tapping screw.With a kind of special no cutting drill spot facing cutter (shape that is shaped as the hole of cutter), under rotating at a high speed, on tube surface, to pressurize, frictional heat makes machining area softening, makes on the tube wall to form and the consistent hole of no cutting drill spot facing cutter shape, promptly be required thread Pilot hole.This hole has increased the length of thread Pilot hole because the extruding during moulding makes the thickness in hole will thicken than pipe thickness.
The thread Pilot hole of Fig. 2 for making with the drilling tool of no sword 1, its diameter phi d2 is the thread Pilot hole diameter, and the thickness h value in its hole can reach 5mm, and after tapping screw was shot, (generally pitch was 0.5mm～1mm) to produce thread about 5～10 buttons.Because thread button number increases, increased the coupling mechanism force of tapping screw, strengthened the connection reliability of tapping screw.
The material of described drilling tool 1 is a carbide alloy, perhaps is ceramic cutting tool material.Do not lean on friction, extruding with workpiece fully because there is the cutting drill spot facing cutter, must have high hardness, the intensity under the high temperature, red hardness, could satisfy processing request.
Described screwed hole bottom diameter is 3.3mm～5mm.
The tapering of described cone 3 is 30 °～40 °, and the vertex of a cone of described cone 3 is the bulb of diameter less than 0.5mm.
Tapering is excessive, can't get out needed hole; Tapering is too small, causes not having cutting drill spot facing cutter undercapacity, can't process.
Be the outwards round platform 6 of protrusion of diametric(al) between described clamp segment 5 and the land 4, the step plane at the two ends of described round platform 6 is perpendicular to the axis of drilling tool 1.
Fig. 3 is the no cutting drill spot facing cutter 1 of the utility model, and its diameter phi d is thread Pilot hole diameter (φ d=φ 3.3mm～φ 5mm), and h is boring thickness (h=5mm).Drill bit is processed with special material, and material has certain high temperature red hardness, wearability; The cone angle of drill bit is about 35 degree, and the cone angle front end is provided with the circular arc (R bulb) of R0.4, and upper end, drill bit h place is provided with the step plane, and this plane is the important step surface of shaping extruded hole end face.
On the whole taper seat of described cone 3, be provided with protruding prismatic according to its generatrix direction.Form profile of tooth on its cross section, strengthen the effect of friction, extruding, accelerate the shaping in hole, the ability of hole processing is improved.
The utility model also provides the processing method of above-described thin-wall pipe upper screwed hole machining tool, and its goal of the invention is identical with technique scheme.The technical scheme of this processing method is:
With described drilling tool 1, be fixedly mounted on the drill press spindle chuck at a high speed through clamp segment 5;
Described pipe fitting 2 is fixed;
Start drilling machine, drilling tool 1 is applied certain axial compressive force, no cutting drill spot facing cutter 1 is acted on the surface of pipe fitting 2 through drilling machine;
Under the effect of drilling tool 1 high speed rotation and axial compressive force, drilling tool 1 and pipe fitting 2 frictions, fricative heat makes the zone that existing drilling tool 1 contacts on the pipe fitting 2 softening;
Under the extruding of drilling tool 1 certain pressure, the tube wall of the pipe fitting 2 after softening forms nest dress hole;
Along with moving down of drilling tool 1, on the tube wall of pipe fitting 2, form the consistent hole of land 4 shapes with drilling tool 1;
Step plane extruding on drilling tool 1 swells the metal of tube wall face, causes the step plane that forms protrusion tube wall 0.8mm～1.2mm, and at this moment, the thread Pilot hole of lengthening wall thickness, height forms.
The no cutting drill spot facing cutter 1 that the utility model is special has hardness and intensity under the high temperature, is contained on the drilling machine at a high speed, applies certain pressure, and no cutting drill spot facing cutter 1 is acted on the surface of pipe, and is as shown in Figure 4.Under rotating at a high speed, no cutting drill spot facing cutter 1 and pipe friction, the zone that fricative heat makes no cutting drill spot facing cutter 1 contact with pipe fitting 2 is softening; Under the extruding of no cutting drill spot facing cutter 1 certain pressure; Softening tube wall moulding nest dress hole, along with moving down of no cutting drill spot facing cutter 1, moulding and the consistent hole of no cutting drill spot facing cutter shape on tube wall; The metal that swells the tube wall face is pushed on step plane to not having on the cutting drill spot facing cutter 1; To making the step plane that forms about protrusion tube wall 1mm, at this moment, the thread Pilot hole of lengthening wall thickness height has just formed.
The signal in concrete each stage of moulding is shown in Figure 4.Be followed successively by: moulding is bored and is begun processing; Pierce in the tube wall; Bore and pass through tube wall; Continue to be shaped; The moulding end that puts in place.At this moment, the short plane of the planar friction compact making hole on the no cutting drill spot facing cutter 1.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted the method design of the utility model and the improvement of the various unsubstantialities that technical scheme is carried out; Or the design of the utility model and technical scheme are directly applied to other occasion without improving, all within the protection domain of the utility model.
Claims (6)
1. thin-wall pipe upper screwed hole machining tool; Described machining tool is the drilling tool (1) of the thread Pilot hole on the described pipe fitting of processing (2); The rear end of described drilling tool (1) is clamp segment (5); It is characterized in that: the front end of described drilling tool (1) is a cone (3), described cone (3) afterwards for coaxial line, be shaped as columniform land (4), the diameter dimension of described land (4) is identical with described screwed hole bottom diameter.
2. according to the described thin-wall pipe upper screwed hole of claim 1 machining tool, it is characterized in that: the material of described drilling tool (1) is a carbide alloy, perhaps is ceramic cutting tool material.
3. according to the described thin-wall pipe upper screwed hole of claim 1 machining tool, it is characterized in that: described screwed hole bottom diameter is 3.3mm～5mm.
4. according to the described thin-wall pipe upper screwed hole of claim 1 machining tool, it is characterized in that: the tapering of described cone (3) is 30 °～40 °, and the vertex of a cone of described cone (3) is the bulb of diameter less than 0.5mm.
5. according to the described thin-wall pipe upper screwed hole of claim 1 machining tool; It is characterized in that: the round platform (6) that outwards protrudes for diametric(al) between described clamp segment (5) and the land (4), the step plane at the two ends of described round platform (6) is perpendicular to the axis of drilling tool (1).
6. according to the described thin-wall pipe upper screwed hole of claim 1 machining tool, it is characterized in that: on the whole taper seat of described cone (3), be provided with protruding prismatic according to its generatrix direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205316676U CN202498243U (en) | 2011-12-19 | 2011-12-19 | Screwed hole processing tool for thin walled tube fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205316676U CN202498243U (en) | 2011-12-19 | 2011-12-19 | Screwed hole processing tool for thin walled tube fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202498243U true CN202498243U (en) | 2012-10-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205316676U Expired - Fee Related CN202498243U (en) | 2011-12-19 | 2011-12-19 | Screwed hole processing tool for thin walled tube fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202498243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259283A (en) * | 2014-07-31 | 2015-01-07 | 山东沃亚森曼机械科技有限公司 | Flanging forming machining method for pipe wall hole |
-
2011
- 2011-12-19 CN CN2011205316676U patent/CN202498243U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259283A (en) * | 2014-07-31 | 2015-01-07 | 山东沃亚森曼机械科技有限公司 | Flanging forming machining method for pipe wall hole |
| CN104259283B (en) * | 2014-07-31 | 2016-11-09 | 山东沃亚森曼机械科技有限公司 | Processing method for tube wall hole flanging shaping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20151219 |
|
| EXPY | Termination of patent right or utility model |