CN104550433A - Stamping punch and stamping method thereof and production method of polyurethane rubber sleeve - Google Patents
Stamping punch and stamping method thereof and production method of polyurethane rubber sleeve Download PDFInfo
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- CN104550433A CN104550433A CN201410852972.3A CN201410852972A CN104550433A CN 104550433 A CN104550433 A CN 104550433A CN 201410852972 A CN201410852972 A CN 201410852972A CN 104550433 A CN104550433 A CN 104550433A
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- soft cover
- arbitrarily
- polyurethane
- rubber sleeve
- drift
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/243—Perforating, i.e. punching holes in profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/482—Drying adhesives, e.g. solvent based adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention belongs to the technical field of punching equipment and relates to a stamping punch which aims at solving the problems that the accuracy of holes which are just punched in the steel is affected due to the fact the steel cannot be timely discharged after the stamping punching on the steel is achieved through the stamping punch in the existing fixing discharging device. The stamping punch comprises a punch body and also comprises a polyurethane rubber sleeve which sleeves the punch body; the bottom end of the polyurethane rubber sleeve is at least lower than the bottom end of the punch body; the polyurethane rubber sleeve comprises a soft sleeve and a hard sleeve which is bonded at the upper end of the soft sleeve; the hardness of the soft sleeve is 55 to 60 A; the hardness of the hard sleeve is 66 to 70 A. Meanwhile the invention provides a stamping method and a production method of the polyurethane rubber sleeve. According to the stamping punch and the stamping method thereof and the production method of the polyurethane rubber sleeve, the technical problems can be effectively solved.
Description
Technical field
The invention belongs to punching apparatus technical field, relate to a kind of punching press drift, described punching press drift may be used for the punching press to various steel, such as angle steel, except non-invention illustrates, otherwise the steel of punching press drift of the present invention are generally Q345 steel, the thickness of steel is 3-10mm, polyurethane rubber sleeve of the present invention can select the urethane rubber materials of any model to make, but precondition is at least that demand fulfillment the present invention is to soft cover and apply arbitrarily about the regulation of hardness, soft cover and the hardness applied arbitrarily all represent with shore hardness, VIPS is three isopropyl alkene ethoxy ethylene base silane coupling agents, TDI is toluene di-isocyanate(TDI), TMP is metopycide.
Background technology
Steel are raw material of various industrial products, from raw material to finished industrial product, need to carry out various processing to steel, carrying out punching punching press to steel is exactly a kind of common steel processing mode, technical staff adds man-hour to steel, often steel are placed in diel, then make drift down perforating by punching.
But, there is certain limit in the making precision of drift and diel, drift completes the complete hole of Hou Gangchong in punching press has stronger extruding force to drift, therefore, when drift is retracted, steel can along with drift be together to the direction motion that drift is retracted, and technical staff will stop steel after punching press completes along with drift is called discharging to the operating process of the direction motion that drift is retracted together usually.
The method that current prevention steel move to the direction that drift is retracted with drift after punching press completes installs fixing device for discharging additional, it is large that this class device has stripping force, the feature of reliable operation, but the requirement of fixing device for discharging because facilitating steel to adjust stamping position, be not easy to directly be pressed on steel, but be usually located at the top of steel, its concrete discharging principle allows drift retract drive steel, and come off from drift after making steel touch fixing device for discharging, obviously steel have been there occurs when fixing device for discharging discharging along with drift retraction with rushing cephalomotor event, steel are because self gravitation and punching are to the acting in conjunction of drift extruding force, that cannot guarantee with position during punching press is parallel, such as common situation is that the angle of steel and drift forms acute angle, this and drift are distinguishing to situation in 90 ° during steel punching press, thus cause the precision of the steel punching of just having rushed impaired (usual punching can be widened), in addition, fix device for discharging when discharging because colliding with steel, the noise produced also can not be ignored.
Summary of the invention
The technical issues that need to address of the present invention can not carry out discharging to steel after being the perforating by punching that existing fixing device for discharging completes steel at punching press drift timely, thus the precision in the hole making steel just rush is impaired, a kind of thinking solving this problem finds the parts that can substitute fixing device for discharging in addition, such as can directly will the steel of punching be needed to be fixed on perforating mold, then start drift and punching is carried out to steel, and after punching terminates, the parts of described fixed steel are taken apart, take out steel again, the problem of timely discharging after although the solution that the mode of directly being fixed by steel can be satisfied has rushed hole to steel, but technical staff has to face a new problem, namely often a hole is rushed, need to fix at least one times and dismantlement work the parts of fixed steel, those are needed to the punching operation of once property repeatedly punching on steel, operating efficiency is obviously subject to great impact, in addition, the accurate calibration of steel punching position also will be the unaffordable muscle power work of technical staff.
The present invention advises directly being directly installed on existing pressing equipment parts by device for discharging, the benefit done like this does not need extra to set up parts for pressing equipment, the present invention more advises directly improving the parts of existing pressing equipment, makes the parts after improvement possess the function of instant discharging.
Simple structure in pressing equipment can be selected as the parts improved, such as drift, resilient sleeve on drift overlaps, the bottom of resilient sleeve is arranged on the position lower than drift bottom, when punching press, at least synchronously steel are propped up with drift body bottom resilient sleeve, and certain pressure is applied with to steel, the position skew that described pressure can stop steel to occur instantaneously before punch, be at least and guarantee that the precision of punching punching press eliminates hidden danger, and after punching press terminates, the described pressure drift body that can contend with is retracted and drives the drive that steel move to drift body retracted orientation, as long as technical staff adjusts pressure, described pressure is such as made to be greater than the maximum value possible of described drive, just can make steel discharging timely after having rushed hole.
For this reason, in some embodiments of the invention, provide a kind of punching press drift, comprise drift body, this drift also comprises the spring be enclosed within drift body, and the bottom of described spring is at least lower than the bottom of drift body.In some embodiments of the invention, described spring is replaced by air cushion.
Although spring and air cushion can help the present invention to obtain certain discharging effect, but the elastic force that undeniable general spring can provide is limited, the discharging work compared with steel plate cannot be competent at, select the spring that elastic force is larger, such as butterfly spring, although can provide larger stripping force, its axial deformation is less, uses inconvenience, air cushion is generally applied to stretching die, tonnage is comparatively large, and input cost is comparatively large, cannot large-scale promotion.
By contrast, in preferred embodiments more of the present invention, provide a kind of punching press drift, comprise drift body, this drift also comprises the polyurethane rubber sleeve be enclosed within drift body, and the bottom of described polyurethane rubber sleeve is at least lower than the bottom of drift body.Polyurethane rubber sleeve can provide larger elastic force pressure, and intensity is high, and deflection is comparatively large, and fatigue strength is also comparatively large, and cost is lower, easy to process.
General, polyurethane rubber sleeve all temporarily can meet the timely discharging of steel after having rushed hole, but after repeatedly punching, polyurethane rubber sleeve also exists the trend to shift position, drift body upper end, and this trend makes the bottom of polyurethane rubber sleeve remain to be positioned at below the punching press end of drift body or guarantees to support flat with punching press bottom.Steel so just cannot be stoped in punch steel moment, the position skew that steel self occur, for guaranteeing punching precision, technical staff has to use miscellaneous part to ensure that the position before stamping of steel is fixed, thus the intent of the present invention part is fallen through.
In addition, the life-span of polyurethane rubber sleeve is also troubling, and after Multi-step forming, the fracture of rubber sleeve may occur, this phenomenon is especially obvious at the position that rubber sleeve often stretches.One during the material of integrated regulation polyurethane rubber sleeve can solve the problem, and the adjustment of material, the unloading performance of polyurethane rubber sleeve will be changed to a great extent, based on above-mentioned consideration, it is preferred that described polyurethane rubber sleeve is set to Split type structure, the technological deficiency that polyurethane rubber sleeve shows can be gone by the part being positioned at polyurethane rubber sleeve different parts to overcome, such as described polyurethane rubber sleeve comprises soft cover and is bonded in applying arbitrarily of soft set upper side, like this, in the process of extruding polyurethane rubber sleeve, although the trend that soft cover bends will be larger than applying arbitrarily, but its good resistance to bending performance can make it adapt to such work, apply arbitrarily closer to rigid, stretching is applied arbitrarily more for needs external force.Comprise soft cover and the polyurethane rubber sleeve applied arbitrarily has certain hardness generally, the polyurethane rubber sleeve that hardness is more than 50A can provide certain unloading performance, is more satisfactory generally.
In fact, the hardness of soft cover of the present invention is 55A-60A, and the hardness applied arbitrarily is 66A-70A.The function of soft or hard cover will have suitable discrimination, and when extruding polyurethane rubber sleeve, soft or hard is overlapped respective function and obtained good performance.
Preferred as one, the hardness of described soft cover is 56A-58A, and the hardness applied arbitrarily is 68A-69A, and preferred as one, the hardness of described soft cover is 56A, and the hardness applied arbitrarily is 68A.
For the soft cover that hardness is 55A-60A, need the THICKNESS CONTROL of soft cover at 25mm-36mm, to make it have good unloading performance, what also can not become because of blocked up is not easy to be extruded and to produce less extruding distance simultaneously, thus the adverse effect that the soft cover hardness of partial offset gives in this respect, select in the length of polyurethane rubber sleeve, it has been generally acknowledged that the shorter polyurethane rubber sleeve of polyurethane rubber sleeve longer under identical material has larger unloading performance, soft cover and apply arbitrarily and only form the part of polyurethane rubber sleeve, respective length is all shorter, the described unloading performance having a polyurethane rubber sleeve of Split type structure is obviously troubling.But in fact, there is proper proportional relationship in the length that the unloading performance of soft or hard cover does not overlap with soft or hard, it is such as the soft cover of 25mm-36mm for thickness, if by the cut to lengthen of soft cover at 10mm-20mm, its maximum stripping force will maintain high-level scope (representing with unit pressure during soft cover discharging, is 2.5Mpa-3.0Mpa), lengthen the length of soft cover further, its maximum stripping force base growth is few, causes lower technical benefits.
The present invention finds further, and for the soft cover cited by the present invention, need to be expressed to reasonably distance and just it can be made to have given play to maximum stripping force, described distance is generally the 35%-45% of described soft cover length.The same with soft cover, apply arbitrarily and also can produce extruding distance when being squeezed, but described in apply arbitrarily produce extruding distance little compared with soft cover, and the soft cover of different squeezed state and apply arbitrarily after increasing separately unit extruding distance, the size of the stripping force increased is visibly different (general, after simple polyurethane rubber is enclosed within and is squeezed, the stripping force increment that unit extruding distance produces is generally first to increase and reduces afterwards).
On this basis, the present invention wishes can when soft cover be squeezed, make the extruding distance controlling of soft cover at the 35%-45% of described soft cover length, and the enough described drift body of extruding distance meeting polyurethane rubber sleeve entirety carries out punching to thickness of steel product given to this invention, if described length of applying arbitrarily is arranged on 12mm-26mm can realize above-mentioned technical goal.
Certainly, on the implementation during one section of described technical scheme, inevitably there is so a kind of bad phenomenon, namely when the extruding distance of soft cover exceedes the extruding distance played required for its maximum stripping force, apply arbitrarily and will be forced to accept harmful extruding (i.e. harmful extruding distance, apply arbitrarily when accepting extruding, if extruding distance is less than harmful extruding distance, apply arbitrarily and itself substantially can not have damage, if and exceed described harmful extruding distance, then itself can damage applying arbitrarily), or the extruding distance of soft cover does not exceed when playing its extruding distance required for maximum stripping force, apply arbitrarily and be forced to receive harmful extruding.For the relatively soft cover of hardness larger apply arbitrarily for, the common adverse consequences accepting harmful extruding is exactly after the use short period, outer surface of applying arbitrarily just there will be obvious crackle, these crackles can be deepened and extend further, form larger crackle gradually, weaken the stripping force and life-span of applying arbitrarily greatly.
The invention provides a kind of avoid applying arbitrarily accept the technical scheme of harmful extruding, be about to apply arbitrarily and just made soft cover give full play to maximum stripping force before the harmful extruding of acceptance, as long as such technical staff by the technical parameter of soft cover (length of such as soft cover, thickness and maximum stripping force) when carrying out punching to the steel of different-thickness, select suitable softly to overlap, do not worry applying arbitrarily, when accepting extruding, harmful extruding may occur, concrete scheme be that soft cover and the length applied arbitrarily are arranged as follows:
| The length of soft cover | The length applied arbitrarily |
| 10mm-12mm | 12mm-16mm |
| 13mm-17mm | 17mm-20mm |
| 18mm-20mm | 21mm-26mm |
Those skilled in the art are for adopting various diverse ways when obtaining polyurethane rubber sleeve of the present invention, but the easiest method is binded soft cover and applying arbitrarily, thus produce the soft cover of bonding and the Bonded Ring of applying arbitrarily, before this invention, described Bonded Ring is generally to be made up of conventional polyurethanes adhesive, but in view of polyurethane rubber sleeve of the present invention at least needs to bear material unloading function, repeatedly can extrude stretching, extension, even if described conventional polyurethanes adhesive is through process, still easy after the extruding of experience several times is stretched, crack until rupture, weaken the unloading performance of polyurethane rubber sleeve, after fracture, soft cover and apply arbitrarily and just become Split type structure, whole polyurethane rubber sleeve has also just been scrapped.Thus, the firmness of Bonded Ring has become the performance of the normal effect of restriction polyurethane rubber sleeve and has maintained the key factor of its Long Service Life.
The present invention is a kind of Bonded Ring for those skilled in the art provide, described Bonded Ring is formed by adhesive for polyurethane solidification, described adhesive for polyurethane comprises TDI modification polyethylene glycol adipate, TDI-TMP addition product and VIPS, the weight ratio of described TDI modification polyethylene glycol adipate and TDI-TMP addition product is the mass percent concentration of 5.1-5.5: 1.1-1.4, VIPS in adhesive for polyurethane is 0.51%-0.55%.Described Bonded Ring can play its excellent technique effect, such as, be used for by described Bonded Ring cohering soft cover of the present invention and applying arbitrarily, and the peel strength (90 ° of strippings) of the polyurethane rubber sleeve of formation is at least 3546.51N/m.
Preferred as one, thermoplastic polyurethane selected by soft cover, such as full thermoplastic polyurethane or half thermoplastic polyurethane, apply arbitrarily and select casting type polyurethane or blending-type polyurethane, the peel strength (90 ° of strippings) of described polyurethane rubber sleeve is at least 3612.76N/m.
Accompanying drawing explanation
Fig. 1 is the structural representation of punching press drift described in embodiment 1.
Detailed description of the invention
In summary of the invention part, the present invention is not described further the soft cover of bonding and the solidification of polyurethane adhesive of applying arbitrarily, in fact, those skilled in the art can be easy to find the method about solidification, and obtain corresponding technique effect, but the peel strength of the polyurethane rubber sleeve obtained is difficult to promote further, this detailed description of the invention introduces a kind of preparation method of polyurethane rubber sleeve, the peel strength of described polyurethane rubber sleeve (90 ° of strippings) at least can be increased to 3798.48N/m by the method, and the method comprises:
The preparation process of a, surface conditioning agent;
The configuration step of b, adhesive for polyurethane;
C, to apply arbitrarily and the adhesion step of soft cover;
Described a step comprises step TCCA and ethyl acetate being mixed to form surface conditioning agent;
Described b step comprises the step that TDI modification polyethylene glycol adipate and TDI-TMP addition product is mixed to form mixture and in mixture, adds VIPS to form the step of adhesive for polyurethane;
Described step c comprises the step by soft cover and viscose face difference hacking of applying arbitrarily;
To the step of soft cover and viscose face sprayed surface inorganic agent of applying arbitrarily;
The step of adhesive for polyurethane is brushed to soft cover and gluing face of applying arbitrarily;
And by the step of soft cover and gluing face adhering and solidifying of applying arbitrarily;
The weight ratio of described TDI modification polyethylene glycol adipate and TDI-TMP addition product is 5.1-5.5: 1.1-1.4, the mass percent concentration of described VIPS in adhesive for polyurethane is 0.51%-0.55%, and the weight ratio of described TCCA and ethyl acetate is 10.5-11.0: 89.0-89.5.
Further, in some embodiments of the invention, the described step to soft cover and gluing face brushing adhesive for polyurethane of applying arbitrarily comprises:
First time brushes the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily;
The step that first time toasts soft cover and gluing face of applying arbitrarily;
Second time brushes the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily;
Second time carries out the step of toasting to soft cover and gluing face of applying arbitrarily;
Described first time brushes in the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily, the brushing thickness of adhesive for polyurethane is 0.5mm-1.1mm, described second time is brushed in the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily, and the brushing thickness of adhesive for polyurethane is 1.2mm-2.3mm.
In some embodiments of the invention, in the step that described first time toasts soft cover and gluing face of applying arbitrarily, baking temperature is 49 DEG C-51 DEG C, baking time is 3-5min, in the step that described second time is toasted soft cover and gluing face of applying arbitrarily, baking temperature is 49 DEG C-51 DEG C, and baking time is 9-11min.
The length of the Bonded Ring be made up of adhesive for polyurethane can control at below 4mm, this does not have impact substantially for soft cover and the effect played when polyurethane rubber sleeve accepts extruding of applying arbitrarily, test discovery simultaneously, adhesive for polyurethane is brushed solidification at twice, further the peel strength (90 ° of strippings) of described polyurethane rubber sleeve at least can be increased to 4025.21N/m, for the temperature of soft cover and gluing face adhering and solidifying of applying arbitrarily, technical staff can select with reference to prior art, but the temperature that the present invention recommends is 120 DEG C, the peel strength (90 ° of strippings) that this temperature can further improve polyurethane rubber sleeve is at least increased to 4092.34N/m.
Polyurethane rubber sleeve of good performance can help technical staff to realize various technique effect of the present invention to a great extent, these contents have had in summary of the invention part and have related in a large number, such as the present invention summary of the invention part refer to especially a kind of prevent from applying arbitrarily there is the technical scheme of harmful extruding, be about to apply arbitrarily and just made soft cover give full play to maximum stripping force before the harmful extruding of acceptance, although technical staff reasonably can be mated soft cover and the length applied arbitrarily according to some promptings of summary of the invention part, and by the 35%-45% of the extruding distance controlling of soft cover in soft cover length, but under many circumstances, control rough like this can produce larger error, thus harmful extruding will be caused accidentally to applying arbitrarily, the another one task of this detailed description of the invention is just to provide a kind of process for stamping of punching press drift, the method comprises:
1., material steel is placed on the punch die being provided with the punching relative with described drift;
2., drift undershoot, the distance making drift pour punching is the compression distance of soft cover and the compression distance sum applied arbitrarily, and the compression distance of described soft cover and the extruding distance applied arbitrarily are determined according to following table:
| The length of soft cover | The extruding distance of soft cover | The length applied arbitrarily | The extruding distance applied arbitrarily |
| 10mm-12mm | 5mm-6mm | 12mm-16mm | 4mm-7mm |
| 13mm-17mm | 6mm-8mm | 17mm-20mm | 5mm-8mm |
| 18mm-20mm | 8mm-10mm | 21mm-26mm | 7mm-11mm |
3., the step of drift withdrawal.
Perform according to described process for stamping, can avoid occurring harmful extruding of applying arbitrarily, technical staff can be easy to the mechanism of regulable control punch distance, such as hydraulic cylinder, cylinder and piston type stretching structure, by the punching press distance controlling of drift in soft cover extruding distance and the scope of extruding apart from sum of applying arbitrarily, reach the maximization of polyurethane rubber sleeve stripping force simultaneously, such as when the length of soft cover is 10mm-12mm, the stripping force of polyurethane rubber sleeve represents with unit pressure, for 2.6Mpa-2.9Mpa, when the length of soft cover is 13mm-17mm, polyurethane rubber sleeve stripping force unit pressure represents, for 2.7Mpa-3.0Mpa, when the length of soft cover is 18mm-20mm, polyurethane rubber sleeve stripping force unit pressure represents, for 2.8Mpa-3.0Mpa.
Embodiment 1
See Fig. 1, a kind of punching press drift, the polyurethane rubber sleeve comprising drift body and be enclosed within drift body, polyurethane rubber sleeve comprise apply arbitrarily 3, Bonded Ring 5 that soft cover 4 and bonding apply arbitrarily 3 and soft cover 4, the baffle 2 that drift body comprises ram post 1 and is connected with ram post 1 top, described polyurethane rubber sleeve is enclosed within ram post 1, comparatively ram post 1 is large for the bore of described baffle 2, therefore baffle 2 bottom surface is except part is used for being connected with ram post 1, also have part to form to keep out apply arbitrarily 3 keep out face.
The full thermoplastic polyurethane that described soft cover 4 is 57A by hardness is made, and length is 13mm, applies arbitrarily 3 to be 69A by hardness casting type polyurethane is made, and length is 17mm, and the thickness of whole polyurethane rubber sleeve is 29mm.
Bonded Ring 5 forms for being solidified by adhesive for polyurethane, adhesive for polyurethane comprises TDI modification polyethylene glycol adipate, TDI-TMP addition product and VIPS, the weight ratio of described TDI modification polyethylene glycol adipate and TDI-TMP addition product is the mass percent concentration of 5.3: 1.2, VIPS in adhesive for polyurethane is 0.53%.
The present embodiment suggestion is adopted and is prepared polyurethane rubber sleeve with the following method:
By weight ratio be 10.8: 89.3 TCCA mix with ethyl acetate, formation surface conditioning agent is stand-by, then by weight ratio be 5.3: 1.2 TDI modification polyethylene glycol adipate mix with TDI-TMP addition product, VIPS is added again in the mixture of TDI modification polyethylene glycol adipate and TDI-TMP addition product, make the mass percent concentration of VIPS be 0.53%, thus make adhesive for polyurethane.
Soft cover gluing face and gluing face hacking of applying arbitrarily, then to soft cover gluing face and gluing face sprayed surface inorganic agent separately of applying arbitrarily, the thick adhesive for polyurethane of 1mm is brushed to soft cover gluing face and gluing face of applying arbitrarily again after completing, subsequently by soft cover and apply arbitrarily and put into baking oven and toast 4min, baking temperature is set in 50 DEG C, again the thick adhesive for polyurethane of 2mm is brushed to soft cover gluing face and gluing face of applying arbitrarily after baking terminates, then by soft cover and apply arbitrarily and put into baking oven and toast 10min, baking temperature is set in 50 DEG C, baking terminates after-applied external force makes soft cover gluing face mutually bind with gluing face of applying arbitrarily, being heating and curing of 2h is carried out to soft cover 4 and the bonding part of applying arbitrarily between 3 simultaneously, controlling solidification temperature is 120 DEG C.Above-mentioned soft cover 4 and the bonding part of applying arbitrarily between 3 are Bonded Ring 5.The peel strength (90 ° of strippings) of the polyurethane rubber sleeve that the present embodiment obtains is 4156.78N/m.
Embodiment 2-4
Embodiment 2-4 is substantially the same manner as Example 1, difference is the thickness of soft cover length and hardness, length of applying arbitrarily and hardness and polyurethane rubber sleeve, in embodiment 2-4, the hardness of soft cover is 56A, the hardness applied arbitrarily is 68A, and following table reflects the situation of soft cover length, length of applying arbitrarily and polyurethane rubber sleeve thickness in embodiment 2-4.
| Embodiment | The length of soft cover | The length applied arbitrarily | The thickness of polyurethane rubber sleeve |
| 2 | 11mm | 13mm | 25mm |
| 3 | 15mm | 18mm | 27mm |
| 4 | 19mm | 22mm | 30mm |
Embodiment 5-7
Polyurethane rubber sleeve described in embodiment 2-4 is inserted in ram post respectively separately, punching is carried out to angle steel: be first placed on by angle steel on the punch die relative with ram post, then drive the stretching structure of the overall undershoot of drift according to following table adjustment, make the undershoot distance of drift and soft cover and the extruding distance sum applied arbitrarily equal.
Then punching is carried out to angle steel, after having rushed hole, whole drift is regained.
Described in embodiment 5-7, the stripping force of polyurethane rubber sleeve is reflected by following table.
| Embodiment | Polyurethane rubber sleeve stripping force (unit pressure represents) |
| 5 | 2.7Mpa |
| 6 | 2.8Mpa |
| 7 | 3.0Mpa |
Claims (10)
1. a punching press drift, comprise drift body, its special card is that this drift also comprises the polyurethane rubber sleeve be enclosed within drift body, the bottom of described polyurethane rubber sleeve is at least lower than the bottom of drift body, described polyurethane rubber sleeve comprises soft cover and is bonded in applying arbitrarily of soft set upper side, the hardness of soft cover is 55A-60A, and the hardness applied arbitrarily is 66A-70A.
2. a kind of punching press drift according to claim 1, is characterized in that the thickness of polyurethane rubber sleeve is 25mm-36mm, and the length of described soft cover is 10mm-20mm.
3. a kind of punching press drift according to claim 2, the length applied arbitrarily described in it is characterized in that is 12mm-26mm.
4. a kind of punching press drift according to Claims 2 or 3, the length that it is characterized in that described soft cover and the length applied arbitrarily as follows:
。
5. a kind of punching press drift according to claim 1, it is characterized in that the Bonded Ring that described polyurethane rubber sleeve also comprises the soft cover of bonding and applies arbitrarily, described Bonded Ring is formed by adhesive for polyurethane solidification, described adhesive for polyurethane comprises TDI modification polyethylene glycol adipate, TDI-TMP addition product and VIPS, the weight ratio of described TDI modification polyethylene glycol adipate and TDI-TMP addition product is the mass percent concentration of 5.1-5.5: 1.1-1.4, VIPS in adhesive for polyurethane is 0.51%-0.55%.
6. a preparation method for polyurethane rubber sleeve, comprising:
The preparation process of a, surface conditioning agent;
The configuration step of b, adhesive for polyurethane;
C, to apply arbitrarily and the adhesion step of soft cover;
Described a step comprises step TCCA and ethyl acetate being mixed to form surface conditioning agent;
Described b step comprises the step that TDI modification polyethylene glycol adipate and TDI-TMP addition product is mixed to form mixture and in mixture, adds VIPS to form the step of adhesive for polyurethane;
Described step c comprises the step by soft cover and viscose face difference hacking of applying arbitrarily;
To the step of soft cover and viscose face sprayed surface inorganic agent of applying arbitrarily;
The step of adhesive for polyurethane is brushed to soft cover and gluing face of applying arbitrarily;
And by the step of soft cover and gluing face adhering and solidifying of applying arbitrarily;
The weight ratio of described TDI modification polyethylene glycol adipate and TDI-TMP addition product is 5.1-5.5: 1.1-1.4, the mass percent concentration of described VIPS in adhesive for polyurethane is 0.51%-0.55%, and the weight ratio of described TCCA and ethyl acetate is 10.5-11.0: 89.0-89.5.
7. the preparation method of polyurethane rubber sleeve according to claim 6, is characterized in that the step of brushing adhesive for polyurethane to soft cover and gluing face of applying arbitrarily comprises:
First time brushes the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily;
The step that first time toasts soft cover and gluing face of applying arbitrarily;
Second time brushes the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily;
Second time carries out the step of toasting to soft cover and gluing face of applying arbitrarily;
Described first time brushes in the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily, the brushing thickness of adhesive for polyurethane is 0.5mm-1.1mm, described second time is brushed in the step of adhesive for polyurethane to soft cover and gluing face of applying arbitrarily, and the brushing thickness of adhesive for polyurethane is 1.2mm-2.3mm.
8. the preparation method of polyurethane rubber sleeve according to claim 7, it is characterized in that in the step that described first time toasts soft cover and gluing face of applying arbitrarily, baking temperature is 49 DEG C-51 DEG C, baking time is 3-5min, in the step that described second time is toasted soft cover and gluing face of applying arbitrarily, baking temperature is 49 DEG C-51 DEG C, and baking time is 9-11min.
9. the preparation method of polyurethane rubber sleeve according to claim 6, it is characterized in that described by soft cover and apply arbitrarily in the step of gluing face adhering and solidifying, solidification temperature is 120 DEG C.
10. a process for stamping for punching press drift, comprising:
1., angle steel is placed on the punch die being provided with the punching relative with described drift;
2., drift undershoot, the distance making drift pour punching be the extruding Distance geometry of soft cover apply arbitrarily extruding distance sum, the extruding distance that the extruding Distance geometry of described soft cover is applied arbitrarily is determined according to following table:
3., the step of drift withdrawal.
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| US3485122A (en) * | 1967-12-21 | 1969-12-23 | Howard S Achler | Spring-stripper for use with punches,dies and the like |
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| CN102218469A (en) * | 2011-05-05 | 2011-10-19 | 保定天威集团有限公司 | Silicon steel sheet punching process and device for simultaneously punching two holes |
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| CN203221133U (en) * | 2013-03-29 | 2013-10-02 | 滁州市精华模具制造有限公司 | Sample plate type steel belt trimming die structure |
| CN204620809U (en) * | 2014-12-18 | 2015-09-09 | 浙江盛达铁塔有限公司 | A kind of punching press drift |
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|---|---|---|---|---|
| US3485122A (en) * | 1967-12-21 | 1969-12-23 | Howard S Achler | Spring-stripper for use with punches,dies and the like |
| US5359914A (en) * | 1993-06-29 | 1994-11-01 | Brown Richard H | Two part urethane punch stripper |
| CN102218469A (en) * | 2011-05-05 | 2011-10-19 | 保定天威集团有限公司 | Silicon steel sheet punching process and device for simultaneously punching two holes |
| CN102825429A (en) * | 2012-09-06 | 2012-12-19 | 浙江科朗汽车配件有限公司 | Automatic punching machine for steel strip |
| CN203221133U (en) * | 2013-03-29 | 2013-10-02 | 滁州市精华模具制造有限公司 | Sample plate type steel belt trimming die structure |
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