CN101362277A

CN101362277A - Manufacture method of composite screw

Info

Publication number: CN101362277A
Application number: CNA2007101419277A
Authority: CN
Inventors: 谢抑霖
Original assignee: DINGHAO TECHNOLOGY Co Ltd
Current assignee: DINGHAO TECHNOLOGY Co Ltd
Priority date: 2007-08-06
Filing date: 2007-08-06
Publication date: 2009-02-11

Abstract

The invention relates to a method for producing a screw of composite material. The method comprises the steps of material preparation, welding, cutting and shaping in sequence, wherein, in the material preparation step, two different materials are divided into a rod body part and a drilling tail part; a welding part is formed on the rod body part, and a taper body is formed on the drilling tail part. Through the taper surface formed on the taper body, not only air can be smoothly exhausted when the rod body part is welded with the drilling tail part (namely, the welding step), so as to avoid air covering in the welding process, and ensure that pores can not appear at the welding positions, but also the composite blank can not be deflected after welding; finally, through the cutting of residual material in the cutting step, and shaping operations of screw thread rolling and the like, the screw of the composite material can be shaped, therefore, the quality of the screw of the composite material can truly be improved through the method.

Description

The manufacture method of composite screw

Technical field

The invention relates to a kind of manufacture method of composite screw.

Background technology

Consult Fig. 1 and Fig. 2, known composite screw manufacture method 1, it includes material preparation step 11, welding step 12, cutting step 13 and forming step 14 etc.; Wherein, this material preparation step 11 is the mother metal of two kinds of unlike materials to be distinguished be shaped to a rod body part 15 and a brill afterbody 16, and an end of this rod body part 15 is shaped to a spiral shell head 151 simultaneously, and a welding ends 152 in contrast to this spiral shell head 151 directions setting; Again, one end of this brill afterbody 16 is shaped to one and bores tail end 161, and these brill tail end 161 rightabouts are provided with an abutting end 162, and convex with a joint fastener 163 that combines with this welding ends 152 on this abutting end 162, and on this joint fastener 163 and convex with a projection 165 with a burnishing surface 164.

Still continuous aforementioned, after aforementioned material is ready to complete, can carry out this welding step 12, that is by this welding ends 152 and projection 165 mutual friction mutually, mutually combine and be the aspect of a compound stock 2 to reach this rod body part 15 and to bore afterbody 16, and as shown in Figure 3, afterwards, again via this cutting step 13 will this compound stock 2 unnecessary waste utilization turning mode removed, and form state shown in Figure 4, carry out this forming step 14 at last, should utilize threading equipment (not shown) to mold thread 21 by compound stock 2, make aspect and form composite screw shown in Figure 53.

Only, find in the actual manufacture process, the following disappearance of its tool, details are as follows now:

When 1, welding with brill afterbody 16 owing to this rod body part 15, be to be frictionally engaged mutually with projection 165 with this welding ends 152 to form, in view of burnishing surface 164 mutual spinning on this welding ends 152 and the projection 165 in the welding process, the part air can't disengage smoothly when easily making welding, after causing this rod body part 15 and boring afterbody 16 welding, its weld is easily accumulated the generation hole because of air by coating, influences this rod body part 15 and bores afterbody 16 intensity that is bonded with each other.

2, still continuous above-mentioned, in view of this welding ends 152 is parallel aspect with this joint fastener 163 because of two planes, adding friction welding process must utilize high voltage to cooperate, so welding process is difficult for making this rod body part 15 and brill afterbody 16 to align mutually, cause the welding back to produce the crooked phenomenon of irreparability, influence quality bills of materials and yield, also be worth being improved.

Summary of the invention

Therefore, purpose of the present invention is the manufacture method that is to provide a kind of composite screw, and the phenomenon of hole took place when it reduced welding, increases weld strength, improves the quality bills of materials of composite screw.

For this reason, the present invention adopts following scheme: a kind of manufacture method of composite screw, and it includes in regular turn: a material preparation step, the mother metal of its unlike material of getting everything ready, and this mother metal is molded a rod body part and respectively bore afterbody; Wherein, an end of this rod body part forms a spiral shell head, then is a smooth solder side in contrast to the other end of this spiral shell head; In addition, these brill afterbody central authorities are formed with a center line, and an end of this brill afterbody is formed with a taper, and this taper external diameter bores the bar footpath of afterbody greater than this, this taper has a sharp conical surface simultaneously, and a bottom surface in contrast to this sharp conical surface, and this bottom surface and join with this brill afterbody; One welding step is welded to each other this solder side and this taper and is formed with a weld, forms a compound stock so that this rod body part and this brill afterbody join; One cutting step is processed the compound stock after the aforementioned welding, is removed should weld place formation excess stock, makes this weld form a smooth periphery; And a forming step, this compound stock after the cutting is carried out this brill tail moulding and this thread calendering forming operation, to mold the screw of this composite.

Above-mentioned material preparation step can be in advance forms one in the end in contrast to this taper of this brill afterbody and bores tail, and be connected with stamping forming unnecessary waste material in this brill tail periphery, as long as should carry out the thread calendering forming by compound stock in order to this forming step, can directly should remove operation by unnecessary waste material, and then mold the screw of composite.

Above-mentioned bottom surface and this center line are an inclined design, so that this bottom surface and this sharp conical surface joint form a sharp-pointed angle.

Above-mentioned sharp conical surface is coarse aspect.

Adopt such scheme, the present invention divides into the mother metal of unlike material rod body part and bores afterbody, rod body part is formed with a smooth solder side, bore afterbody and be provided with a taper, this taper has a sharp conical surface, in this rod body part and brill afterbody welding process, the design of this taper of mat, the mutual friction welding of solder side and taper, make taper be gradual feeding, remove and to help air is discharged smoothly, reduce the welding process air and coat outside the hole disappearance that produces, and can reach accurately to plus effect when making this rod body part and boring the afterbody welding, reduce outside the crooked phenomenon after welding, increase the intensity of welding, reduced the fraction defective of product, promoted the quality bills of materials of screw.

Description of drawings

Fig. 1 is the flow chart of known composite screw manufacture method;

Fig. 2～Fig. 5 is known composite screw forming process schematic diagram;

Fig. 6 is the flow chart of first preferred embodiment of the manufacture method of composite screw of the present invention;

Fig. 7 is the manufacture method partial schematic diagram of composite screw of the present invention;

Fig. 8～Figure 10 is a composite screw forming process schematic diagram of the present invention;

Figure 11 is the partial schematic diagram of second preferred embodiment of the manufacture method of composite screw of the present invention.

The main element symbol description

Manufacture method 51 material preparation steps of 5 composite screws

52 welding step, 53 cutting steps

54 forming steps, 6 compound stocks

61,881

waste materials

62,88 bore tail

63 threads, 7 rod body part

71 spiral shell heads, 72 solders side

8 bore afterbody 81 tapers

82 sharp conical surfaces, 83 bottom surfaces

882 cutting edge α angles

β center line D external diameter

D bar footpath

The specific embodiment

About aforementioned and other technology contents, characteristics and effect of the present invention, below cooperate reference diagram and preferred embodiment to elaborate.

Before the present invention is described in detail, be noted that in the following description similar elements is to represent with identical numbering.

Consult Fig. 6, first preferred embodiment of the present invention, the manufacture method 5 of this composite screw consists predominantly of steps such as material preparation step 51, welding step 52, cutting step 53 and forming step 54.

Cooperate and consult Fig. 7, this material preparation step 51 is divided into a rod body part 7 and a brill afterbody 8 with the mother metal shaping area of unlike material; Wherein, this rod body part 7 belongs to stainless steel in present embodiment, and an end of this rod body part 7 is shaped to a spiral shell head 71, and forms a smooth solder side 72 in contrast to these spiral shell head 71 other ends; In addition, this brill afterbody 8 belongs to low-carbon steel material in present embodiment, and should bore afterbody 8 and through heat treatments such as carburizings, so that this contained carbon element in brill afterbody 8 surfaces is promoted to middle carbon above (being that phosphorus content is more than 35%), moreover, the central authorities of this brill afterbody 8 are formed with a center line β, and an end of this brill afterbody 8 is formed with a taper 81, and these taper 81 outer diameter D are bored the bar footpath d of afterbody 8 greater than this, and these taper 81 surfaces through modes such as turning to form coarse sharp conical surface 82, and the bottom surface 83 in contrast to this sharp conical surface 82, and the formed carburizing of heat treatment partly can be removed through turning on aforementioned this sharp conical surface 82, be positioned at this taper 81 and bore afterbody 8 touching positions as for this bottom surface 83, this bottom surface 83 is indent design simultaneously, that is this bottom surface 83 is an inclined design with this center line β, so that this bottom surface 83 forms a sharp-pointed angle α with sharp conical surface 82, that is these taper 81 peripheries are the thickness gradually-reducing shape.

Still continuous aforementioned, after aforementioned this material preparation step 51 is finished, can carry out welding step 52, the solder side 72 that also is about to rod body part 7 pushes up to pull mutually with the taper 81 of this brills afterbody 8 and welds, and this sharp conical surface 82 is gradual joint in the welding process, add this coarse sharp conical surface 82 designs, so in the welding process for arround air can not be subjected to the welding influence and produce coating phenomenon, produce outside the hole disappearance to reduce weld, this welding complete process does not have the surplus carbon element and lies across in weld simultaneously, increase weld strength, and after this taper 81 dissolves in welding step 52 fully, this rod body part 7 and bore being welded to each other of afterbody 8 and can reach accurately, and then mold a compound stock 6 (as shown in Figure 8) to plus effect, and the weld periphery of this compound stock 6 can increase and unnecessary waste material 61.

Moreover, be right after at this compound stock 6 and cut step 53, also be about to this unnecessary waste material 61 and give the turning removal, and form shown in Figure 9, more present thickness convergent state in view of these taper 81 peripheries this moment, so these unnecessary waste material 61 quantity reduce relatively, so remove more easily on the turning operation; Carry out forming step 54 at last, it is this compound stock 6 to be utilized bore tail former (not shown) and threading equipment (not shown), divide safety pin to bore tail 62 moulding and thread 63 calendering forming operations for this compound stock 6, with the manufacturing 9 that molds composite screw, and form state shown in Figure 10; Certainly, being that the material after the manufacturing 9 that strengthens this composite screw changes and requirement, thus can heat-treat once more according to customer requirement again and step such as surface treatment, so that the realistic user demand of composite screw of producing.

Consult Figure 11; second preferred embodiments of the present invention; its main difference with first preferred embodiment is: the end that bores afterbody 8 punch forming of going ahead of the rest of getting everything ready of this material preparation step 51 goes out one and bores tail 88; and these brill tail 88 peripheries also are connected with stamping forming unnecessary waste material 881; when so this brill afterbody 8 carries out this welding step 52; even this brill afterbody 8 is subjected to the clamping of anchor clamps (not shown); the cutting edge 882 of this brill tail 88 still can be subjected to unnecessary waste material 881 protections; so can not undermine the sharpness of this cutting edge 882 during welding step 52 is carried out; when thread 63 moulding of this forming step 54; should together remove by unnecessary waste material 881 just now; guarantee the sharpness of this cutting edge 882, and the cutting power that this composite screw is actual to be used is increased.

Conclude aforementioned, the manufacture method 5 of composite screw of the present invention, mainly be to be the mother metal of unlike material is divided into rod body part 7 and bored afterbody 8, and this rod body part 7 is formed with a smooth solder side 72, and this brill afterbody 8 is provided with a taper 81, by this solder side 72 and taper 81 mutual friction weldings, so that this taper 81 is gradual feeding, remove and help in the welding step 52 air to be discharged smoothly, coat outside the hole disappearance that produces to reduce welding process minimizing air, and this rod body part 7 and can reaching when boring afterbody 8 welding accurately plus effect after the welding effectively promotes this composite screw quality, so can reach purpose of the present invention really.

The above person of thought, only be explanation preferred embodiment of the present invention, when not limiting scope of the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and description of the invention content generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.

Claims

1. the manufacture method of a composite screw, it includes in regular turn:

One material preparation step, the mother metal of its unlike material of getting everything ready, and this mother metal is molded a rod body part and respectively bore afterbody; Wherein, an end of this rod body part forms a spiral shell head, then is a smooth solder side in contrast to the other end of this spiral shell head; Bore afterbody central authorities and be formed with a center line, and an end of this brill afterbody is formed with a taper, and this taper external diameter is greater than this bar footpath of boring afterbody, and this taper has a sharp conical surface simultaneously, and the bottom surface in contrast to this sharp conical surface, this bottom surface also joins with this brill afterbody;

One welding step is welded to each other this solder side and this taper and is formed with a weld, this rod body part and this brill afterbody is joined form a compound stock;

One cutting step is processed the compound stock after the aforementioned welding, should weld place formation excess stock and be removed, and makes this weld form a smooth periphery; And

One forming step bores tail moulding and the operation of thread calendering forming with the compound stock after the cutting, to mold the screw of this composite.

2. the manufacture method of composite screw as claimed in claim 1, wherein, this material preparation step end in this brill afterbody in contrast to this taper in advance forms a brill tail, and be connected with stamping forming unnecessary waste material in this brill tail periphery, as long as this forming step should carry out the thread calendering forming by compound stock, can directly should remove operation by unnecessary waste material, and then mold the screw of composite.

3. the manufacture method of composite screw as claimed in claim 1, wherein, this bottom surface and this center line are an inclined design, so that this bottom surface and this sharp conical surface joint form a sharp-pointed angle.

4. the manufacture method of composite screw as claimed in claim 1, wherein, this sharp conical surface is coarse aspect.