CN1246107C

CN1246107C - Manufacturing process and installation for the thin bolt with spanner pilot hole and hexangular socket head

Info

Publication number: CN1246107C
Application number: CN 02131657
Authority: CN
Inventors: 张允得
Original assignee: FUGUANG ENTERPRISE Co Ltd
Current assignee: FUGUANG ENTERPRISE Co Ltd; FWU Kuang Enterprises Co Ltd
Priority date: 2002-09-12
Filing date: 2002-09-12
Publication date: 2006-03-22
Anticipated expiration: 2022-09-12
Also published as: CN1481949A

Abstract

The present invention relates to a manufacturing method and manufacturing device for a thin bolt with a spanner pilot hole and a hexangular socket head. The manufacturing device comprises four groups of female dies and male dies having corresponding impact forgings and different molding, blank materials which are in the shape of a straight rod orderly enter in the female dies, and are impacted and forged by the corresponding male dies; the blank materials are orderly impacted and forged into a first blank product with a fusiform end head, a second blank product with a cylindrical end head and a taper hole at the center of the end edge, a third blank product with an inner hexagon hole, a cylindrical hole and a pointed taper hole which are orderly ranged from the end edge to the inner part, and a forth blank product with an inner hexagon hole and a pilot hole of the inner hexagon hole, a screw in the same forming machine for forging products can complete jobs before rolling threads, and additional turning operation is not needed. The present invention has good efficacy and man-hour saving.

Description

The manufacture method and the manufacturing installation thereof of the screw of thin tape spanner pilot hole hexangular socket head

[technical field]

The present invention relates to a kind of manufacture method and manufacturing installation thereof of screw, particularly relate to a kind of manufacture method and device thereof of screw of thin tape spanner pilot hole hexangular socket head.

[background technology]

As shown in Figures 1 and 2, screw make-up machine 1 in the past has board 11, be installed in first master mold 12 on the board 11, second master mold 13 and the 3rd master mold 14, corresponding position in the place ahead of waiting master mold 12～14 and can relative first male model 15 towards these master mold 12～14 reciprocal punching presses, second male model 16 and the 3rd male model 17, three groups corresponding at the rear of these master molds 12～14 the corresponding jacking passing out set 18 that is extended through in the master mold 12～14 also, reach three groups of grip devices (scheming not show) that move back and forth in the place ahead of these master molds 12 synchronously.During manufacturing, wire rod 19 is sent in this screw make-up machine 1, become stock 191 through straightening, blank, pinch in regular turn to these master molds 12～14 through grip device again, and be subjected to corresponding male model 15～17 to carry out a series of punching press to forge, then the semi-finished product after this impact forging are delivered to drilling machine and bored after the system guide hole, carry out operation processing procedures such as other follow-up threadings, tapping again, to finish manufacturing.

As shown in Figures 2 and 3, with regard to the forged part of the thin tape spanner pilot hole hexangular socket head screw 2 that do not carry out the threading processing procedure as yet, this screw 2 has columniform shaft 21, and from an end of shaft 21 termination 22 of protruding expansion radially.This termination 22 has the inner hexagonal hole 221 that is formed at end face central authorities.21 of this shafts have the pilot hole 211 that connects inner hexagonal hole 221.And this screw 2 is on method for making in the past, will according to screw 2 moulding that must forge, make these master molds 12～14 and these male models 15～17 of above-mentioned screw make-up machine 1, collocation define the shape of die cavity that must corresponding moulding.

In design, this first master mold 12 has first die orifice 121 towards first male model 15, one front-end edge of this first die orifice 121 is opening and expands shape towards inner cone, and this first male model 15 has first drift 151 of corresponding first die orifice 121, it is poroid that the end edge of this first drift 151 is recessed circular cone, define first die cavity at this

first die orifice

121 and 151 of first drifts, go out to have the first embryo product 23 of spindle termination with impact forging.This second master mold 13 has second die orifice 131 towards second male model 16, this second die orifice 131 has and is expanded into a leading portion that slightly is the taper cylindrical hole, this second male model 16 has second drift 161 of corresponding second die orifice 131, the rear end of this second drift 161 be by pointed cone behind the mediad protrude cone-shaped, define second die cavity at this

second die orifice

131 and 161 of second drifts, the end face central authorities that go out to have cylindrical end head and termination with impact forging have the second embryo product 24 in pointed cone hole.The 3rd master mold 14 has the 3rd die orifice 141 towards the 3rd male model 17, the 3rd die orifice 141 has diameter greater than the leading portion of the cylinder hole shape of the leading portion of second die orifice 131, the 3rd male model 17 has corresponding the 3rd drift 171 that protrudes out towards the 3rd die orifice 141, the 3rd drift 171 is the hexagon cylinder of ora terminalis central authorities pointed cone, define the 3rd die cavity at the

3rd die orifice

141 and 171 of the 3rd drifts, go out to have the 3rd embryo product 25 of the termination moulding of inner hexagonal hole 221 with impact forging.And the corresponding impact forging that the stock 191 of this direct rod shape is borrowed these male models 15～17 and master mold 12～14, be between these drifts and die orifice in the formed die cavity, the successive punch forming is the first embryo product 23 with spindle termination, the second embryo product 24 with oblate termination, and has the 3rd embryo product 25 of the termination moulding of inner hexagonal hole 221.Again the 3rd embryo product 25 are made secondary operations at last, must be at the end face center of the 3rd embryo product 25 towards inner hexagonal hole 221, bore the concentric pilot hole 211 of system one and inner hexagonal hole 221 with drilling machine again, just finish preceding basic screw 2 manufacturings of threading.

The pilot hole 211 of above-mentioned embryo product adds man-hour in boring, and the processing personnel must above-mentioned a large amount of these forged parts, cooperate drilling machine one by one its brill to be made the screw 2 with pilot hole 211 in the mode of semi-hand, suitable waste of manpower and man-hour in processing.In addition, above-mentioned screw 2 in boring processing, easily the cutting lip side cut angle that is positioned at tail end because of the drill bit of drilling machine not just, or the auger spindle of drill bit is askew not straight partially, or processing personnel's factors such as misoperation, and causes pilot hole 211 centers to be difficult for the disappearance of aiming at.And produce in the boundary at screw at present, the tolerance of 211 standards of relevant pilot hole is very little, be 0.06～0.09mm, therefore make the relative raising of precision palpus of this pilot hole 211, if yet the center of working as pilot hole 211 is askew partially, or when making the pore size error of pilot hole 211 big because of the boring processing factors, this screw 2 is exactly to become the faulty materials that can't use, and therefore method for making in the past has fraction defective height and the high disappearance of cost.

As shown in Figure 4, for fear of the problem of above-mentioned pilot hole 211 in processing, if the shape that to change the 3rd drift 171 is just thought deeply by the manufacturer that has, protrude out one section obelisk bar 172 again in the rear end of the 3rd drift 171, become the drift of a multiple field scalariform, just can directly correspondingly forge this inner hexagonal hole 221 and pilot hole 211 in the 3rd embryo product 25 upper punches, so except solving above-mentioned disappearance, more can reduce processing procedure, it is excessive for the area discrepancy of circular obelisk bar 172 with the cross section that but the cross section is hexagonal the 3rd drift 171, thereby cause applied stress to be concentrated in therebetween junction, and in the forging of reality, because of the 3rd drift 171 and obelisk bar 172 are to protrude in the embryo product, the embryo product that also are deformed in impact forging embryo product squeeze and push away, be subjected to the active force extruding of embryo product, make the whole filling in unoccupied place of not leaving a blank of the 3rd drift 171 and obelisk bar 172 buried and be sandwiched between in the embryo product, can be subjected to bigger compression in the handing-over of this multiple field drift being in this time be shaped, so when impact forging is finished and during male model 17 reach, the 3rd drift 171 and obelisk bar 172 can be pullled and be ruptured, can't produce, therefore the place of in an impact forging manufacturing, still having any problem at all.

In addition, in above-mentioned forging processing procedure, the 3rd male model 17 is that relative supporting pasted with the 3rd master mold 14, and the 3rd embryo product 25 are that the position is in the

3rd drift

171 and 141 the 3rd airtight die cavitys of the 3rd die orifice, with microcosmic, in impact forging, the 3rd embryo product 25 can be subjected to momentum effect and be out of shape, and flowing of material will be subject in the 3rd die cavity, yet because of the 3rd male model 17 is not to be fixed on the 3rd master mold 14, so when the impact forging moulding, the 3rd male model 17 also can be subjected to the reaction force of the 3rd embryo product 25 relatively, and a little before moves away the 3rd master mold 14, makes the 3rd embryo product 25 have the nargin of distortion forward, and be not limited in the 3rd die cavity fully, therefore the 3rd embryo product 25 towards ora terminalis corner 251 places of shaft, and can't be filled in the trailing edge of the leading portion of the 3rd die orifice 141 in the termination relatively, just the edge of change of shape in the 3rd die cavity, and ora terminalis corner 251 places that make above-mentioned the 3rd embryo product 25 form an arc angle, are difficult to be configured as flat surface and vertical angle.This will influence screw in the future usability, reduce result of use.

[summary of the invention]

The manufacture method and the manufacturing installation thereof that the purpose of this invention is to provide a kind of screw of thin tape spanner pilot hole hexangular socket head, can be in same forging press moulding one have the screw of the hexangular socket head of thin tape spanner pilot hole, can reach the effect that the accuracy of manufacture is high and reduce cost.

The invention provides a kind of manufacture method of screw of thin tape spanner pilot hole hexangular socket head, it is characterized in that: it comprises the steps:

(1) first forges the module impact forging: the stock of a direct rod shape is inserted in one first die orifice of one first master mold, and be subjected to the corresponding impact forging of one first drift of one first male model, to forge first embryo product with a spindle termination;

(2) second forge the module impact forging: these first embryo product are inserted in one second die orifice of one second master mold, and be subjected to the corresponding impact forging of one second drift of one second male model, forging second embryo product with a termination, and this termination has one and extends the taper hole of the bundle that contracts along a central axis from an end face;

(3) the 3rd forge the module impact forging: these second embryo product are inserted in one the 3rd die orifice of one the 3rd master mold, and be subjected to the corresponding impact forging of one the 3rd drift of one the 3rd male model, to forge the 3rd embryo product with a termination, this termination has a perforate along this central axis extension from an end face, this perforate has along what this central axis was arranged in regular turn one pulls out the hole section near the hexagon ring section, of this end face the opening up of bundle of contracting gradually, and the pointed cone hole section of pointed cone condensation gradually; And

(4) the 4th forge the module impact forging: the 3rd embryo product are inserted in one the 4th die orifice of one the 4th master mold again, and be subjected to the corresponding impact forging of one the 4th drift of one the 4th male model, to forge the 4th embryo product with a termination, this termination has a perforate along this central axis extension from an end face, this perforate has the guide hole section that a hexagon ring section, is connected this hexagon ring section rear end in regular turn along this central axis, and one from a rear end of this guide hole section the taper hole section of pointed cone condensation gradually.

The present invention also provides a kind of manufacturing installation of screw of thin tape spanner pilot hole hexangular socket head, comprise: a board, be installed in one first master mold, one second master mold, one the 3rd master mold and one the 4th master mold on this board in regular turn, and corresponding position is in the place aheads of these master molds and connect one first male model, one second male model, one the 3rd male model and one the 4th male model of power source; It is characterized in that:

This first master mold has first die orifice of being located on the front end face, this first die orifice has one and is out the front opening that expands shape, and this first male model has a pair of first drift that should first die orifice, and this first drift has to be located at the rear end and to be recessed forward taper hole;

This second master mold has second die orifice of one side to second male model, this second die orifice has a leading portion opening that is expanded into a taper cylindrical hole, this second male model has a pair of second drift that should second die orifice, and this second drift has a pointed cone that protrudes from rear end central authorities;

The 3rd master mold has three die orifice of one side to the 3rd male model, the 3rd die orifice has a diameter than the cylinder perforate greater than this leading portion opening, the 3rd male model has a pair of the 3rd drift that should protrude out towards the 3rd die orifice, the 3rd drift has that a hexagon shell of column, that protrudes out backward is formed at the end edge central authorities of this shell of column and the awl cervical part of esophagus of the bundle that contracts gradually, and one from an ora terminalis of this awl cervical part of esophagus backward the convergent bundle become cone-shaped conehead section; And

The 4th master mold has four die orifice of one side to the 4th male model, the 4th die orifice has the cylinder perforate of a diameter greater than the cylinder perforate of the 3rd die orifice, the 4th male model has a pair of the 4th drift that should protrude out towards the 4th die orifice, the neck section of stretching, one that the 4th drift has that an extension that protrudes out backward, is extended from a rear end of this extension after by forward direction in regular turn and curves the constriction shape towards the middle part arc gradually along a central axis is connected the cylindrical section of the rear end of this neck section of stretching, reach one from an ora terminalis of this cylindrical section backward the convergent bundle become cone-shaped pointed cone section.

The present invention's screw make-up machine more in the past is that the advantage of Cui is:

One, makes facility: utilize screw manufacture method of the present invention and manufacturing installation, just can be in same forging press, with four groups of mold in turn stamping cold forgings, just can finish work flow required before threading and desired shape with always changing, and other car system processing operation needn't be arranged, real is a kind of manufacturing installation easily.And,,, be a design of saving man-hour in fact for the day by day serious screw industry of competition so the whole activity duration can shorten dramatically because of in same forging press, just finishing required operation.

Two, save cost: from the above, the present invention can be in a screw make-up machine direct forging molding, and must not process car system separately, therefore can reduce faulty materials in a large number, reduce fraction defective, to save cost.

[description of drawings]

The present invention is described in detail below in conjunction with drawings and Examples:

Fig. 1 be a kind of make-up machine of screw in the past simple mechanism overlook cross-sectional schematic.

Fig. 2 is three master molds of correspondence among Fig. 1 and the amplification view of three male models.

Fig. 3 is a schematic flow sheet of screw moulding in the past, and the modification flow process of embryo product after the screw make-up machine forges in the past is described, and the drill bit of representing with an imaginary line in last flow process is shown in brill system one pilot hole in one the 3rd embryo product.

Fig. 4 is the part amplification view of Fig. 1, and corresponding one the 3rd master mold and one the 3rd male model are described, and the part enlarged drawing of one the 3rd embryo product of institute's impact forging therebetween.

Fig. 5 is the phantom of a preferred embodiment of screw device of the present invention, and corresponding four master molds and four male model relativenesses are described.

Fig. 6 is the phantom of this preferred embodiment, and corresponding one the 3rd master mold and one the 3rd male model are described, and the part enlarged drawing of one the 3rd embryo product of institute's impact forging therebetween.

Fig. 7 is the phantom of this preferred embodiment, and corresponding one the 4th master mold and one the 4th male model are described, and the part enlarged drawing of one the 4th embryo product of institute's impact forging therebetween.

Fig. 8 is a flow process schematic diagram, and the modified flow of embryo product after these male models of present embodiment and master mold forge respectively is described.

[specific embodiment]

As Fig. 5, Figure 6 and Figure 7, first preferred embodiment of a kind of screw manufacturing installation of the present invention is to comprise a board 3, be installed in one first master mold 41, one second master mold 42, one the 3rd master mold 43 and one the 4th master mold 44 on this board 3 in regular turn, and corresponding position is in the place aheads of these master molds 41～44 and can be subjected to drive power source and relatively towards one first male model 51, one second male model 52, one the 3rd male model 53 and one the 4th male model 54 of these master mold 41～44 reciprocal punching presses.As for other devices of this screw manufacturing installation and action then with identical in the past, no longer superfluous stating for this reason.Above-mentioned these male models 51～54 pairing master mold 41～44 of must arranging in pairs or groups respectively, to define the die cavity of reservation shape in regular turn, and forging molding go out must moulding screw, therefore in the following description, be distinctly with the sequencing explanation accordingly in groups of master mold and pairing male model, just will relative master mold and male model be considered as one group of forging module.Certainly, these master molds and male model are made up of a plurality of different modules respectively, only illustrate in the present embodiment, illustrate that just each master mold has a pair of die orifice of answering male model, and each male model has the drift of chimeric relatively this die orifice at the die cavity that defines the shaping block product.

With regard to the first forging module, this first master mold 41 has first die orifice 411 that is formed on the front end face, this first die orifice 411 has a back segment circular hole 412 that is positioned at the straight shape of length at rear, and one is positioned at the place ahead and connects back segment circular hole 412 and be out the front opening 413 that expands shape.And this first male model 51 has one and is formed on the rear end face and to first drift 511 that should first die orifice 411, this first drift 511 has one and is formed at the rear end and the taper hole 512 of the bundle that contracts forward gradually.To define one first die cavity at first

relative die orifice

411 and 511 of first drifts.

With regard to the second forging module, this second master mold 42 has second die orifice 421 towards second male model 52, this second die orifice 421 has a back segment circular hole 422 that is positioned at the straight shape of length at rear, and one be positioned at the place ahead and connect the leading portion opening 423 of this back segment circular hole 422, and this leading portion opening 423 is to be expanded into a taper cylindrical hole.This second male model 52 has second drift 521 of corresponding second die orifice 421, and this second drift 521 has a pointed cone 522 that protrudes from rear end central authorities.Define one second die cavity at this second die orifice 421 and 521 of second drifts.

With regard to the 3rd forging module, the 3rd master mold 43 has the 3rd die orifice 431 towards the 3rd male model 53, the 3rd die orifice 431 has a back segment circular hole 432 that is positioned at the straight shape of length at rear, and one is positioned at the place ahead and is communicated with the leading portion cylinder perforate 433 of this back segment circular hole 432.The diameter of this cylinder perforate 433 is than the leading portion opening 423 greater than second master mold 42.The 3rd male model 53 has and stretches into the back end 531 that supports that plugs on the front end of the cylinder perforate 433 of the 3rd die orifice 431, and a correspondence protrudes out the 3rd drift 532 that enters towards the 3rd die orifice 431, the 3rd drift 532 has that a hexagon shell of column that protrudes out backward 533, is formed at the end edge central authorities of this shell of column 533 and the awl cervical part of esophagus 534 of the bundle that contracts gradually, and an ora terminalis from this awl cervical part of esophagus 534 contracts gradually backward and restraints into cone-shaped conehead section 535.Define one the 3rd die cavity at the

3rd die orifice

431 and 532 of the 3rd drifts.

With regard to the 4th forging module, the 4th master mold 44 has the 4th die orifice 441 towards the 4th male model 54, the 4th die orifice 441 has a back segment circular hole 442 that is positioned at the straight shape of length at rear, and one is positioned at the place ahead and is communicated with the leading portion cylinder perforate 443 of this back segment circular hole 442.The little cylinder perforate 433 of the diameter of this cylinder perforate 443 greater than the 3rd die orifice 431.The 4th male model 54 has the 4th drift 541 that a correspondence protrudes out towards the 4th die orifice 441, the neck section of stretching 543, one that the 4th drift 541 has that a rectangular extension that protrudes out backward 542, is extended from the rear end of this extension 542 after by forward direction in regular turn and curves the constriction shape towards the middle part arc gradually along a central axis is connected the cylindrical section 544 of the rear end of this neck section of stretching 543, reaches an ora terminalis from this cylindrical section 544 and contracts gradually backward and restraint into cone-shaped pointed cone section 545.The diameter of section of the rear end of this neck section of stretching 543 and cylindrical section 544, small in the awl cervical part of esophagus 534 of the 3rd drift 532 and the diameter of 535 junctions of conehead section, the diameter of section of the middle part of this neck section of stretching 543 is less than the diameter of section of cylindrical section 544.Define one the 4th die cavity at the

4th die orifice

441 and 541 of the 4th drifts.

As Fig. 5 and shown in Figure 8, a preferred embodiment of manufacture method of the present invention is to carry out according to following step:

(1) first forges the module impact forging: the stock 6 of a direct rod shape is inserted in first die orifice 411, and be subjected to the corresponding impact forging of first drift 511, to forge the first embryo product 61 with spindle termination 611 in first die cavity.

(2) second forge the module impact forging: the first embryo product 61 are inserted in second die orifice 421, and be subjected to the corresponding impact forging of second drift 521, forging the second embryo product 62 with cylindrical termination 621 in second die cavity, and this termination 621 has the taper hole 622 that extends the bundle that contracts from end face along central axis.

(3) the 3rd forge the module impact forging: the second embryo product 62 are inserted in the 3rd die orifice 431, and be subjected to the corresponding impact forging of the 3rd drift 532, in the 3rd die cavity, to forge the 3rd embryo product 63 with cylindrical termination 631, this termination 631 has the perforate 632 of extending along central axis from end face, this perforate 632 have along central axis arrange in regular turn one near end face and the cross section is hexagonal hexagon ring section 633, a cross section is rounded and the opening up and pull out hole section 634 of the bundle that contracts gradually, and a tapering pulls out the hole section 634 and the pointed cone hole section 635 of pointed cone condensation gradually greater than opening up.

(4) the 4th forge the module impact forging: the 3rd embryo product 63 are inserted in the 4th die orifice 441 again, and be subjected to the corresponding impact forging of the 4th drift 541, to forge the 4th embryo product 64 in the 4th die cavity.The 4th embryo product 64 have the perforate 641 that the perforate 632 from the 3rd embryo product 63 extends to form, this perforate 641 is connected the rounded guide hole section 643 in these hexagon ring section 642 rear ends and cross section along the hexagon ring section 642, that central axis has a hex hole identical with the hexagon ring section 633 of the 3rd embryo product 63 in regular turn, and one from the rear end of this guide hole section 643 the taper hole section 644 of pointed cone condensation gradually.

As Figure 6 and Figure 7, in the 3rd above-mentioned forging module impact forging processing procedure, the back end 531 that supports of the 3rd drift 532 is to stretch into plug to get lodged on the front end of the 3rd die orifice 431, and make the 3rd die cavity of the 3rd embryo product 63 that are shaped become a confined space, so in the time of impact forging, the 3rd embryo product 63 with complete filling in the 3rd die cavity, and tool does not leave the nargin of the 3rd die cavity, the ora terminalis corner 636 towards a shaft can be configured as even curface and vertical angle in a termination to make the 3rd embryo product 63, has the complete external form of enriching.Hole section 634 and pointed cone hole section 635 are pulled out in opening up of the 3rd embryo product 63, be to be used for guiding the 4th drift 541 impact forging, and the constriction of the neck section of stretching 543 of the 4th drift 541 design, can and 64 of the 4th embryo product form the gap, reduce the area that contacts with the 4th embryo product 64, can make things convenient for the turnover of impact forging front and back the 4th drift 541, prolong the service life of the 4th drift 541.The diameter of the awl cervical part of esophagus 534 of the

3rd drift

532 and 535 junctions of conehead section, the diameter of section of little cylindrical section 544 greater than the 4th drift 541, and make the formed diameter of opening up the diameter that pulls out hole section 634 greater than cylindrical section 544, with define can ccontaining the 4th embryo product 64 when 541 impact forging of the 4th drift embryo product material deformation and the gap of the filling of flowing, therefore when impact forging, when the 4th embryo product 64 are stretched in 541 impact forging of the 4th drift, and make the 4th embryo product 64 be positioned at the cylindrical section 544 of the 4th drift 541 and the part around the pointed cone section 545, can be pushed relatively and be out of shape and abut in the 4th drift 541 peripheries, only because of before being reserved with tolerance clearance, therefore the 4th drift 541 unlikely being buried are fallen into pinching in the 4th embryo product 64, and can successfully withdraw from outside the 4th embryo product 64, can not produce the situation of pullling fracture.

Claims

1. the manufacture method of the screw of a thin tape spanner pilot hole hexangular socket head, it is characterized in that: it comprises the steps:

2. the manufacturing installation of the screw of a thin tape spanner pilot hole hexangular socket head, comprise: a board, be installed in one first master mold, one second master mold, one the 3rd master mold and one the 4th master mold on this board in regular turn, and corresponding position is in the place aheads of these master molds and connect one first male model, one second male model, one the 3rd male model and one the 4th male model of power source; It is characterized in that: