CN102335713B - Process and special device for integrally forming convex navel nut for riveting by using wire rods - Google Patents
Process and special device for integrally forming convex navel nut for riveting by using wire rods Download PDFInfo
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- CN102335713B CN102335713B CN201110183657.2A CN201110183657A CN102335713B CN 102335713 B CN102335713 B CN 102335713B CN 201110183657 A CN201110183657 A CN 201110183657A CN 102335713 B CN102335713 B CN 102335713B
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Abstract
The invention discloses a process and special device for integrally forming a convex navel nut for riveting by using wire rods. The process comprises the following steps of: (1) cutting: feeding by an automatic feeding device and cutting a blank off by a cutting die; (2) reshaping: determining the number of stations needed actually according to the shape of a product and the stress situation of a die, and carrying out horizontal forging on the cut surface of the blank; (3) pre-forming of outer circle of the convex navel: positively extruding the outer circle of the convex navel and pre-forming; (4) final forming of the outer circle of the convex navel: carrying out pre-punching and carrying out pre-upset-extrusion on the shape to finally form the outer circle of the convex navel; (5) final forming of inner angle and height of the convex navel: carrying out dual impact front and back to realize the final forming of the inner angle and the height of the convex navel; (6) final forming of overbark of a pre-punched hole: finally forming the overbark of the pre-punched hole to obtain the required size; and (7) punching: punching to remove the overbark of the preformed hole to obtain the required size; and in the step (2) to the step (7), the blank is subjected to cold upsetting and forming through the die by adopting multi-station cold upsetting equipment. The process and the special device disclosed by the invention can realize production automation and standardization and have the characteristics of high production speed and high wire rod utilization ratio.
Description
Technical field
The present invention relates to metal forging manufacture field, relate in particular a kind of with element coil material by the one-body molded riveting of multistage cold former technique and the special equipment with protruding navel nut.
Background technology
As shown in Figure 1A, it is a kind of senior special fastener 9 forming after protruding navel 911 nuts 91 and packing ring 92 riveteds, and it is widely used in the industries such as aviation, automobile and tractor.Along with cost pressure increases day by day, internal vapor depot just progressively strengthens the dynamics of production domesticization parts at present, above-mentioned securing member 9 also becomes the parts that need production in enormous quantities, in order to produce above-mentioned securing member 9, just must first design and process protruding navel 911(that riveted uses as shown in Figure 1B) and there is the nut 91 of this protruding navel 911.
As shown in Fig. 2 A to Fig. 2 F, this riveting is the modes that adopt lathe processing by the traditional handicraft of protruding navel nut 91, apply lathe to the outer chamfering 931 of hexagonal bar 93 cars, and form blank 94 after cutting off, secondly to blank protruding navel 911 outside diameter d 1 of 94 car and protruding navel 911 height h1, then hole 95 and car in the turning processing such as chamfering 96, protruding navel 911 interior angles 97 of car, and process protruding navel nut 91 for riveting as shown in Figure 1B, though this technique can process the protruding navel nut 91 for riveting that shape meets the demands, but still there is following defect:
One, packing ring 92 easily comes off: after this riveted, protruding navel 912 is to guarantee the net shape that pressure-off power is required after packing ring 92 combines with nut 91, but because turning destroys metal streamline, cause pressing and put after the final distortion of protruding navel 911 very easily pressure break, otherwise distortion deficiency easily produces again packing ring 92 obscissions.
Two, stock utilization is extremely low: because it adopts the processing mode of turning, its most of material has all become waste material after processing.
Three, bad order: because it adopts the processing mode of turning, therefore easily produce burr.
Four, bar price is more expensive, and production efficiency is low, cutter rapid wear, and processing cost is high.Labour intensity is large, and Safety and Environmental Protection is poor.
Five, riveted pressure-off power, mechanical strength etc. are all without ensureing.
In view of this, the inventor, for becoming the above-mentioned defect further investigation in protruding navel nut 91 traditional handicrafts for snap riveting, has this case to produce then.
Summary of the invention
The object of the present invention is to provide a kind of technique with protruding navel nut for element coil material one-body molded riveting, to solve that riveting that prior art forms out has with protruding navel nut that packing ring easily comes off, stock utilization is extremely low and the problem such as bad order.
In order to reach above-mentioned purpose, solution of the present invention is:
A technique with the one-body molded riveting of element coil material with protruding navel nut, comprises the steps:
1. blank: by automatic feeding feeding, and block stock by cutting mould;
2. shaping: make actual required station number according to shape of product and the stressed situation of mould, planish stock and cut face;
3. protruding navel cylindrical preparation moulding: just squeezing protruding navel cylindrical preform;
4. protruding navel cylindrical final molding: pre-punched hole and profile preparation upsetting squeeze are to protruding navel cylindrical final molding;
5. protruding navel interior angle and highly final molding: it realizes the final molding of protruding navel interior angle and height via the dual impact in front and back;
6. pre-punched hole gross weight final molding: the gross weight final molding of pre-punched hole is to required size;
7. punching: the gross weight punching in preformed hole is removed to required hole dimension;
Wherein, 7. 2. this step be to adopt two stations or multi-station cold-heading machine equipments more than two stations that blank is passed through to mould cold-heading molding to step.
Further, step 1. in, this automatic feeding is based on the characteristic that after the moulding of protruding navel nut, volume equates with wire rod volume for riveting, and calculates feed length based on gauge or diameter of wire.
Further, step 2. to step 4. in, it is all by blank is arranged in the die orifice of corresponding punch die, and impacts and moulding via pediment stick, this step 2. to step 4. in pediment stick front end there is length and become gradually large drift.
Further, step 5. in, before and after it, dual impact is to adopt a springform device to realize, this springform device comprises formwork, the 4th punch die, the 4th pediment stick, the 4th backlash rod and the first spring, in this formwork, be formed with cavity volume, the 4th punch die is slidably disposed in cavity volume, in the 4th punch die, be formed with the die orifice being installed with for blank, and the two ends of this die orifice wear for the 4th pediment stick and the 4th backlash rod respectively, this the first spring one end is fixedly shape, and the other end is resisted against the rear end of the 4th punch die.
Further, this springform device is installed with in a fixed die, this fixed die inside is formed with the first cavity and the second cavity being interconnected, the connectivity part of this first cavity and the second cavity is formed with convex tendon, this first spring is installed with in the first cavity and is resisted against on convex tendon and is fixedly shape, this springform device also comprises the drive rod being all installed with in the second cavity, the second spring and backlash screw rod, the rear end of this drive rod and the 4th backlash rod is fixedly linked, this the second spring one end is resisted against on convex tendon, the other end is resisted against on drive rod and drive rod is resetted, this drive rod rear end is formed with thin bar, this backlash screw sleeve is located in thin bar and periphery is formed with external screw thread, on this second cavity, be also formed with the internal thread that can coordinate with external screw thread.
Further, the front end of this formwork cavity volume is provided with the flange part of avoiding the 4th punch die to deviate from.
Another object of the present invention is to provide a kind of step springform device 5. in above-mentioned technique that is exclusively used in, it can guarantee the smooth moulding of blank the demoulding smoothly.
Its concrete technical scheme is:
A kind of springform device, wherein, comprise formwork, the 4th punch die, the 4th pediment stick, the 4th backlash rod and the first spring, in this formwork, be formed with cavity volume, the 4th punch die is slidably disposed in cavity volume, is formed with the die orifice being installed with for blank in the 4th punch die, and the two ends of this die orifice wear for the 4th pediment stick and the 4th backlash rod respectively, this the first spring one end is fixedly shape, and the other end is resisted against the rear end of the 4th punch die.
Further, this springform device is installed with in a fixed die, this fixed die inside is formed with the first cavity and the second cavity being interconnected, the connectivity part of this first cavity and the second cavity is formed with convex tendon, this first spring is installed with in the first cavity and is resisted against on convex tendon and is fixedly shape, this springform device also comprises the drive rod being all installed with in the second cavity, the second spring and backlash screw rod, the rear end of this drive rod and the 4th backlash rod is fixedly linked, this the second spring one end is resisted against on convex tendon, the other end is resisted against on drive rod and drive rod is resetted, this drive rod rear end is formed with thin bar, this backlash screw sleeve is located in thin bar and periphery is formed with external screw thread, on this second cavity, be also formed with the internal thread that can coordinate with external screw thread.
Further, the front end of this formwork cavity volume is provided with the flange part of avoiding the 4th punch die to deviate from.
Adopt after said structure, the present invention utilizes element coil material and goes out protruding navel nut for riveting by multistage cold former is one-body molded, specifically by element coil material by automatic feeding with accurate step-by-step system feeding, then by mould through cutting off, shaping, protruding navel cylindrical preparation moulding, protruding navel cylindrical final molding, protruding navel interior angle and height final molding, pre-punched hole gross weight final molding, the continuous cold upsetting squeeze final molding of punching protruding navel nut for riveting, product pushes through moulding quickly and accurately in journey at continuous cold heading, it is with respect to the mode of existing employing lathe processing, can realize the automation of producing, standardization, there is speed of production faster, and the utilization rate of wire rod is high, reach the manufacture requirement that reduces waste material, Improving The Quality of Products and business efficiency.
Accompanying drawing explanation
Figure 1A is the structural representation of securing member in prior art;
Figure 1B is the structural representation with protruding navel nut for the required riveting of securing member shown in moulding Figure 1A;
Fig. 2 A to Fig. 2 F is the operation schematic diagram of protruding navel nut for riveting shown in prior art moulding Figure 1B;
Fig. 3 A to Fig. 3 G is the schematic diagram that the present invention relates to process flow in moulding process preferred embodiment;
Fig. 4 is the structural representation that the present invention relates to springform device.
In figure:
Blank AB
Formwork 4M cavity volume 41M
Flange part 411M the 4th punch die 4D
The 4th pediment stick 4P the 4th backlash rod 4A
The first spring 4H drive rod 4Z
Thin bar 41Z the second spring 4T
Backlash screw rod 4L fixed die 4I
First cavity 41I the second cavity 42I
Convex tendon 43I
Securing member 9 nuts 91
Protruding navel 912 after protruding navel 911 riveteds
Packing ring 92 hexagonal bars 93
Outer chamfering 931 blanks 94
Outside diameter d 1 height h1
The interior chamfering 96 in hole 95
Interior angle 97.
The specific embodiment
In order further to explain technical scheme of the present invention, below by specific embodiment, the present invention will be described in detail.
Refer to shown in Fig. 3 A to Fig. 3 G, it molds protruding navel nut for riveting as shown in Figure 1B via cut-out, shaping, protruding navel cylindrical preparation moulding, protruding navel cylindrical final molding, protruding navel interior angle and height final molding, pre-punched hole gross weight final molding successively with the first cold-drawn hexagonal wire rod of dish.In order to allow reader of the present invention can more understand specific embodiment of the invention, between each molding procedure in riveting with protruding navel nut, there is self-feeding, automatically the operation such as pinch, thus before describing manufacturing process of the present invention in detail, first, to self-feeding, an explanation is done in the operations such as automatic clip distribution apparatus.
I, for self-feeding:
Cold headers automatic feeding mainly includes: the elements such as cam, charging rocking bar, ratchet, ratchet and conveying wheel.Actuated by cams charging rocking bar makes ratchet start ratchet rotate an angle θ, when this ratchet rotates θ, conveying wheel will synchronously rotate θ angle and feeding, conveying wheel will be divided into minute feedings such as 2 π/θ, if effective working diameter of conveying wheel is D, each feed length is π D ÷ (2 π/θ)=D θ/2.
If the volume of T shape welded nut the 5th stock (5B) is V, the diameter of wire rod is d, and feed length is l,
?
Because feed length is D θ/2,
Therefore
?
So, as long as by related data for people, just know θ numerical value, so, by accurately controlling the rotational angle θ of feeding rocking arm, just can make feeding accurate.
II, for automatically pinching:
In continuous forging process, for coordinating automatic production, therefore in production process, need to possess the function automatically pinching.For this reason, in each production procedure, being equipped with special-purpose transhipment folder, as the linking between each flow process, and is the operation requirements that coordinates variant forging flow process, and these special fixtures can divide two kinds of translational clamp and turnover fixtures.
Translational clamp: in forging process, make stock keep same orientation to enter a time flow process, use this translational clamp.
Turnover fixture: in forging process, need make stock turn over turnback, when changing its original orientation and entering a time flow process, use this turnover fixture.Its principle is in the central shaft installing one of transhipment folder, to lead the central gear engagement of gear and equipment clamping and conveying device, and when fixture translation, this is led gear and is driven to rotate, thereby transhipment folder Rotate 180 degree is to meet technique needs.
Understand after above-mentioned automation mechanized operation mode, continuity and novelty that can clearer this production procedure of discovery, be described in detail the technological process the present invention relates to below:
1. blank step: be first that the first hexagonal wire rod of dish is sent into interior cutting die mouth in a stepwise manner by the automatic feeding of Multistation cold upsetting formation machine, then by outer cutter, wire rod cut off, blank AB as shown in Figure 3A.After cutting off, outer cutter holder clips the die orifice 1D that the 1st punch die is delivered in blank AB translation; This automatic feeding is based on the characteristic that after the moulding of protruding navel nut, volume equates with wire rod volume for riveting, and calculates feed length based on gauge or diameter of wire, concrete scheme as self-feeding place in above describe;
2. shaping step: make actual required station number according to shape of product and the stressed situation of mould, planish stock and cut face; Specifically as shown in Figure 3 B, its die orifice that blank AB is pressed into the first punch die 1D by the first pediment stick 1P carries out cold-heading and is shaped to stock 1B, by the first backlash rod 1A, stock 1B is ejected to the die orifice of the first punch die 1D, enter the first transhipment folder, then clip by the first transhipment the die orifice that the second punch die 2D is delivered in stock 1B upset;
3. protruding navel cylindrical preparation moulding: just squeezing protruding navel cylindrical preform; Specifically as shown in Figure 3 C, the die orifice that the second pediment stick 2P is pressed into the second punch die 2D by stock 1B carries out cold-heading, and to squeeze the protruding navel cylindrical of preparation moulding be stock 2B, by the second backlash rod 2A, stock 2B is ejected to the and the die orifice 2D of punch die, enter the second transhipment folder, then clip by the second transhipment the die orifice that the 3rd punch die 3D is delivered in stock 2B translation;
4. protruding navel cylindrical final molding: pre-punched hole and profile preparation upsetting squeeze are to protruding navel cylindrical final molding; Specifically as shown in Figure 3 D, the die orifice that the 3rd pediment stick 3P is pressed into the 3rd punch die 3D by stock 2B carries out cold-heading, and to squeeze the protruding navel cylindrical of final molding be stock 3B, by the 3rd backlash rod 3A, stock 3B is ejected to the die orifice 3D of the 3rd punch die, enter the 3rd transhipment folder, then clip by the 3rd transhipment the die orifice 4D that the 4th punch die is delivered in stock 3B translation;
5. protruding navel interior angle and highly final molding: it realizes the final molding of protruding navel interior angle and height via the dual impact in front and back; Specifically as shown in Fig. 3 E, the 4th pediment stick 4P is pressed into by stock 3B that the 4th punch die 4D carries out that the protruding navel interior angle of final molding is squeezed in cold-heading and is highly stock 4B;
6. pre-punched hole gross weight final molding: the gross weight final molding of pre-punched hole is to required size; Specifically as shown in Fig. 3 F, the 5th pediment stick 5P is pressed into the 5th punch die 5D by stock 4B and carries out the crowded final molding pre-punched hole gross weight of cold-heading to being of a size of stock 5B, by the 5th backlash rod 5A, stock 5B is ejected to the die orifice of the 5th punch die 5D, enter the 5th transhipment folder, then clip by the 5th transhipment the die orifice that stock 5B turnover translation moving is delivered to the 6th punch die 6D;
7. punching: the gross weight punching in preformed hole is removed to required hole dimension; Specifically as shown in Fig. 3 G, the 6th pediment stick 6P is pressed into the 6th punch die 6D by stock 5B and carries out punching, finished product 6B, after de-charging tray is deviate from 6B the 6th pediment stick 6P, be transferred band and deliver to check hopper, after its gross weight is thrust by 6P, from 6D endoporus is discharged, be transferred band and deliver to waste material bucket.
Concrete, step 2. to step 4. in, it is all by blank being arranged in the die orifice of corresponding punch die, and impact and moulding via pediment stick, this step 2. to step 4. in pediment stick front end there is length and become gradually large drift, it is for progressively molding the external form of protruding navel nut for riveting, certainly in order to adapt to protruding navel nut for different rivetings, it can also be set to more multiple working procedure, for example, this protruding navel cylindrical preparation moulding is not defined in a punching press in specific embodiment, and it can be set to repeatedly according to practical situation, so that its smooth moulding.
As shown in Fig. 3 E, because its protruding navel end face does not just first contact the end face of the 4th backlash rod 4A when the protruding navel cylindrical of blank 3B enters the metapore of the 4th punch die 4D, now the protruding umbilical region of blank is subject to the backward extrusion of the 4th backlash rod 4A to cause protruding navel cylindrical swell to exceed the internal diameter size of the 4th punch die 4D metapore, and the metapore that cannot make protruding navel be pressed into smoothly the 4th punch die 4D carries out upsetting squeeze moulding;
In addition, when the 4th backlash rod 4A ejects stock 4B the die orifice of the 4th punch die 4D, while entering the 4th transhipment folder, because of the 4th backlash rod 4A core print, clamp-on the protruding navel of blank and be greater than the 4th transhipment folder clamping force compared with dark knockout press, cause the blank that the 4th transhipment folder has just been clamped by the 4th backlash rod 4A, to be taken back the 4th punch die 4D again, will clip and when the 4th punch die is delivered in stock 3B translation, accumulate 2 blanks and cause cold-heading to push through year and collide with the 3rd transhipment of next stroke.
For above-mentioned two technical barriers, the present invention develops a kind of springform device, as shown in Figure 4, this springform device comprises formwork 4M, the 4th punch die 4D, the 4th pediment stick 4P, the 4th backlash rod 4A and the first spring 4H, in this formwork 4M, be formed with cavity volume 41M, the 4th punch die 4D is slidably disposed in cavity volume 41M, in the 4th punch die 4D, be formed with the die orifice being installed with for blank, and the two ends of this die orifice wear for the 4th pediment stick 4P and the 4th backlash rod 4A respectively, this the first spring 4H one end is fixedly shape, and the other end is resisted against the rear end of the 4th punch die 4D.Concrete, this springform device is installed with in a fixed die 4I, this fixed die 4I inside is formed with the first cavity 41I and the second cavity 42I being interconnected, the connectivity part of this first cavity 41I and the second cavity 42I is formed with convex tendon 43I, and this first spring 4H is installed with in the first cavity 41I and is resisted against convex tendon 43I and be above fixedly shape.
Preferably, in order to solve Second Problem simultaneously, this springform device also comprises drive rod 4Z, the second spring 4T and the backlash screw rod 4L being all installed with in the second cavity 42I, the rear end of this drive rod 4Z and the 4th backlash rod 4A is fixedly linked, this the second spring 4T one end is resisted against on convex tendon 43I, the other end is resisted against drive rod 4Z above makes drive rod 4Z reset, this drive rod 4Z rear end is formed with thin bar 41Z, this backlash screw rod 4L is set in the upper also periphery of thin bar 41Z and is formed with external screw thread, on this second cavity 42I, is also formed with the internal thread that can coordinate with external screw thread.In addition, concrete, the front end of this formwork 4M cavity volume 41M is provided with the flange part 411M that avoids the 4th punch die 4D to deviate from.
Like this, the 4th punch die 4D of this springform device can formwork 4M(with fastened by screw due to fixed die) in before and after slip, by backlash screw rod 4L, adjusted the front and back position of the 4th backlash rod 4A, the first spring 4H ejects the 4th punch die 4D in advance with respect to a fixed journey system of the 4th backlash rod 4A end face, when the 4th pediment stick 4P is pressed into the 4th punch die 4D by stock 3B, its protruding navel cylindrical just can first enter the end face that protruding navel end face after the metapore of the 4th punch die 4D just contacts the 4th backlash rod 4A completely, now the protruding umbilical region of blank be subject to the cylindrical of protruding navel after the backward extrusion of the 4th backlash rod 4A and interior angle will be successfully in the 4th punch die 4D metapore final molding be blank 4B,
When the 4th pediment stick 4P starts to exit, the core print that the first spring 4H of this springform device can push up back the 4th punch die 4D immediately and first depart from the 4th backlash rod 4A with blank 4B, by the drive rod 4Z of this springform device, compressing the second spring 4T again drives the 4th backlash rod 4A stock 4B to be ejected to the die orifice of the 4th punch die 4D, enter the 4th transhipment folder, then clip by the 4th transhipment the die orifice that the 5th punch die 5D is delivered in stock 4B translation.
In sum, the present invention utilizes element coil material and goes out protruding navel nut for riveting by multistage cold former is one-body molded, specifically by element coil material by automatic feeding with accurate step-by-step system feeding, then by mould through cutting off, shaping, protruding navel cylindrical preparation moulding, protruding navel cylindrical final molding, protruding navel interior angle and height final molding, pre-punched hole gross weight final molding, the continuous cold upsetting squeeze final molding of punching protruding navel nut for riveting, product pushes through moulding quickly and accurately in journey at continuous cold heading, it is with respect to the mode of existing employing lathe processing, can realize the automation of producing, standardization, there is speed of production faster, and the utilization rate of wire rod is high, reach the manufacture requirement that reduces waste material, Improving The Quality of Products and business efficiency.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present invention.
Claims (7)
1. the technique with protruding navel nut with the one-body molded riveting of element coil material, is characterized in that, comprises the steps:
1. blank: coil first hexagonal wire rod by automatic feeding feeding, and block stock by cutting mould;
2. shaping: make actual required station number according to shape of product and the stressed situation of mould, planish stock and cut face;
3. protruding navel cylindrical preparation moulding: just squeezing protruding navel cylindrical preform;
4. protruding navel cylindrical final molding: pre-punched hole and profile preparation upsetting squeeze are to protruding navel cylindrical final molding;
5. protruding navel interior angle and highly final molding: it realizes the final molding of protruding navel interior angle and height via the dual impact in front and back;
6. pre-punched hole gross weight final molding: the gross weight final molding of pre-punched hole is to required size;
7. punching: the gross weight punching in preformed hole is removed to required hole dimension;
Wherein, 7. 2. this step be to adopt two stations or multi-station cold-heading machine equipments more than two stations that blank is passed through to mould cold-heading molding to step;
Step 2. to step 4. in, it is all by blank is arranged in the die orifice of corresponding punch die, and impacts and moulding via pediment stick, this step 2. to step 4. in pediment stick front end there is length and become gradually large drift.
2. a kind of technique with protruding navel nut for element coil material one-body molded riveting as claimed in claim 1, it is characterized in that, step 1. in, this automatic feeding is based on the characteristic that after the moulding of protruding navel nut, volume equates with wire rod volume for riveting, and calculates feed length based on gauge or diameter of wire.
3. a kind of technique with protruding navel nut for element coil material one-body molded riveting as claimed in claim 1, it is characterized in that, step 5. in, before and after it, dual impact is to adopt a springform device to realize, this springform device comprises formwork, the 4th punch die, the 4th pediment stick, the 4th backlash rod and the first spring, in this formwork, be formed with cavity volume, the 4th punch die is slidably disposed in cavity volume, in the 4th punch die, be formed with the die orifice being installed with for blank, and the two ends of this die orifice wear for the 4th pediment stick and the 4th backlash rod respectively, this the first spring one end is fixedly shape, the other end is resisted against the rear end of the 4th punch die.
4. a kind of technique with protruding navel nut for element coil material one-body molded riveting as claimed in claim 3, it is characterized in that, this springform device is installed with in a fixed die, this fixed die inside is formed with the first cavity and the second cavity being interconnected, the connectivity part of this first cavity and the second cavity is formed with convex tendon, this first spring is installed with in the first cavity and is resisted against on convex tendon and is fixedly shape, this springform device also comprises the drive rod being all installed with in the second cavity, the second spring and backlash screw rod, the rear end of this drive rod and the 4th backlash rod is fixedly linked, this the second spring one end is resisted against on convex tendon, the other end is resisted against on drive rod and drive rod is resetted, this drive rod rear end is formed with thin bar, this backlash screw sleeve is located in thin bar and periphery is formed with external screw thread, on this second cavity, be also formed with the internal thread that can coordinate with external screw thread.
5. one kind is exclusively used in step springform device 5. in technique as claimed in claim 1, it is characterized in that, comprise formwork, the 4th punch die, the 4th pediment stick, the 4th backlash rod and the first spring, in this formwork, be formed with cavity volume, the 4th punch die is slidably disposed in cavity volume, is formed with the die orifice being installed with for blank in the 4th punch die, and the two ends of this die orifice wear for the 4th pediment stick and the 4th backlash rod respectively, this the first spring one end is fixedly shape, and the other end is resisted against the rear end of the 4th punch die.
6. springform device as claimed in claim 5, it is characterized in that, this springform device is installed with in a fixed die, this fixed die inside is formed with the first cavity and the second cavity being interconnected, the connectivity part of this first cavity and the second cavity is formed with convex tendon, this first spring is installed with in the first cavity and is resisted against on convex tendon and is fixedly shape, this springform device also comprises the drive rod being all installed with in the second cavity, the second spring and backlash screw rod, the rear end of this drive rod and the 4th backlash rod is fixedly linked, this the second spring one end is resisted against on convex tendon, the other end is resisted against on drive rod and drive rod is resetted, this drive rod rear end is formed with thin bar, this backlash screw sleeve is located in thin bar and periphery is formed with external screw thread, on this second cavity, be also formed with the internal thread that can coordinate with external screw thread.
7. springform device as claimed in claim 5, is characterized in that, the front end of the cavity volume of this formwork is provided with the flange part of avoiding the 4th punch die to deviate from.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110183657.2A CN102335713B (en) | 2011-07-01 | 2011-07-01 | Process and special device for integrally forming convex navel nut for riveting by using wire rods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110183657.2A CN102335713B (en) | 2011-07-01 | 2011-07-01 | Process and special device for integrally forming convex navel nut for riveting by using wire rods |
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| CN102335713A CN102335713A (en) | 2012-02-01 |
| CN102335713B true CN102335713B (en) | 2014-07-16 |
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| CN102601294B (en) * | 2012-04-01 | 2014-11-05 | 常熟新华远紧固件有限公司 | Die assembly for forming bottom of spring washer nut |
| CN102615227B (en) * | 2012-04-01 | 2014-09-24 | 常熟新华远紧固件有限公司 | Cold-heading forming method for spring washer nut |
| CN105215629A (en) * | 2014-07-02 | 2016-01-06 | 西安航空动力股份有限公司 | A kind of forging method of complicated stainless steel forging part of thin rib tape interstitial hole |
| CN109226619B (en) * | 2018-09-03 | 2020-04-24 | 嘉兴市飞龙汽车管件有限公司 | Machining process of oil pipe joint |
| CN111085640B (en) * | 2019-12-02 | 2021-05-07 | 山东九佳紧固件股份有限公司 | Cold heading production process of combined nut blank |
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|---|---|---|---|---|
| US4367060B1 (en) * | 1978-10-02 | 1988-06-21 | Seal nut | |
| JPS561239A (en) * | 1979-06-15 | 1981-01-08 | Sanwa Seikou Kk | Production of nut |
| FR2557652A1 (en) * | 1983-12-28 | 1985-07-05 | Yamauchi Susumu | Nut with automatic locking and its method of manufacture. |
| US5531552A (en) * | 1984-08-03 | 1996-07-02 | Multifastener Corporation | Self-attaching nut and method of making same |
| JPH0829392B2 (en) * | 1993-12-17 | 1996-03-27 | 有限会社新城製作所 | Pierce nut manufacturing equipment |
| US6095738A (en) * | 1997-07-11 | 2000-08-01 | Stafast Products, Inc. | Tee nut and method of manufacture |
| CN100484691C (en) * | 2005-01-20 | 2009-05-06 | 厦门恒耀金属有限公司 | Process for forming thin shim by multi-work station cold headers and wire rod |
| CN101920306A (en) * | 2009-06-17 | 2010-12-22 | 厦门恒耀金属有限公司 | Process for forming T-shaped welded nut by multistage cold former |
-
2011
- 2011-07-01 CN CN201110183657.2A patent/CN102335713B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102335713A (en) | 2012-02-01 |
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