CN214023059U - Calendering anti-flying stamping die for steel backing - Google Patents
Calendering anti-flying stamping die for steel backing Download PDFInfo
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- CN214023059U CN214023059U CN202023251754.4U CN202023251754U CN214023059U CN 214023059 U CN214023059 U CN 214023059U CN 202023251754 U CN202023251754 U CN 202023251754U CN 214023059 U CN214023059 U CN 214023059U
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Abstract
The utility model belongs to the technical field of stamping die, specific saying relates to a calendering of steel backing flies stamping die instead. The punching die comprises an upper die plate provided with a punching head, a middle die plate provided with a back-flushing cavity and a lower die plate provided with a positioning support core; the punching head corresponds to the positioning support core, a guide device is arranged between the upper template and the lower template, the recoil cavity is movably sleeved outside the positioning support core through the guide device, and the bottom of the middle template is connected with a power ejector rod. The rolling anti-flying stamping die enhances the anti-flying stamping efficiency when the steel backing is leveled and rolled, obviously improves the finish-punching bright band and the flatness, and has the characteristics of simple structure and convenient use.
Description
Technical Field
The utility model belongs to the technical field of stamping die, specific saying relates to a calendering of steel backing flies stamping die instead.
Background
The brake steel backing is one of important parts of the automobile brake pad, is used for fixing friction materials and is convenient for the brake pad to be arranged on a brake system. Therefore, the quality of the brake pad is greatly influenced by the quality of the section of the steel backing, the area and the size of the fracture surface of the brake pad directly relate to the use and the use effect of the steel backing, and the larger the burr is, the more uneven the fracture surface is, the larger the brake noise is, and the worse the brake effect is.
The steel backing stamping comprises a plurality of production processes of blanking, trimming, edge pressing/bevel edge pressing, punching, point pressing/nail pulling, finishing (including leveling and waste wire separation), burr grinding, embossing, step punching, bulging and the like, and particularly, the finishing process has an important effect on the braking quality of the steel backing.
At present, the steel backing is mainly blanked by a common stamping method, the design of a fine trimming blanking die is deficient and perfect, so that a blanking surface of a blanked part inevitably has a large number of fracture surfaces and burrs, and the service performance of the steel backing is influenced; secondly, in the process of rolling and fine blanking of the steel backing, the smaller the blanking gap is, the higher the probability of flowing (plastic deformation) of the steel backing material is, the more the leveling loss of the die is, the obviously shortened service life is, and especially in the process of reverse flying stamping, the problems of poor coverage of the steel backing bright band, low surface flatness of the steel backing and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reinforcing is anti-to fly stamping efficiency when steel backing flattening calendering, is showing and is improving the anti-stamping die that flies of calendering of essence towards bright band and roughness and simple structure, convenient to use.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a calendering of steel backing flies stamping die that turns over which characterized in that: the punching die comprises an upper die plate provided with a punch, a middle die plate provided with a back-flushing cavity and a lower die plate provided with a positioning support core; the punching head corresponds to the positioning support core, a guide device is arranged between the upper template and the lower template, the recoil cavity is movably sleeved outside the positioning support core through the guide device, and the bottom of the middle template is connected with a power ejector rod penetrating through the lower template.
The additional technical characteristics of the calendering anti-flying stamping die for forming the steel backing further comprise:
the number of the guide devices is four, the guide devices are respectively located at four corners of the middle template, and the number of the power push rods is two, and the two power push rods are respectively located at two sides of the middle template;
the guide device comprises a guide sleeve arranged on the bottom surface of the upper template and a guide post which is positioned in the guide sleeve and stretches, and the guide post is arranged on the surface of the lower template;
a pre-tightening mechanism is arranged in the guide device, and the pre-tightening mechanism comprises a pre-tightening spring sleeved on the guide pillar, or the pre-tightening spring is arranged in the guide sleeve and connected with the end part of the guide pillar;
a pressure-bearing elastic body is arranged between the positioning support core and the lower die plate, and the pressure-bearing elastic body is a rubber damping block or a composite rubber spring;
the cutting edge at the upper edge of the inner side of the backflushing cavity is provided with an arc chamfer, and the upper side of the arc chamfer is provided with a convex edge inclined towards the positioning support core.
The utility model provides a calendering of steel backing is anti-to fly stamping die compares with prior art, has following advantage: firstly, the punch of the upper template of the novel die corresponds to the positioning support core of the lower template, the steel back is pressed and leveled, meanwhile, the recoil cavity of the middle template is movably sleeved outside the positioning support core, and the power ejector rod at the bottom of the middle template penetrates through the lower template, so that the middle template goes upwards to reversely fly and stamp the edge of the steel back, the size of the steel back is refined, the bright zone of the fracture surface is improved, waste wires are removed, and the processing quality and the use performance of the steel back are improved; an upper template of the die is connected with a stamping power cylinder of stamping equipment, a lower template is installed in a workbench of a punch press, a power ejector rod is realized by a lifting cylinder, the template moves up and down through a guide device, an upper template punch head and a recoil cavity can move up and down simultaneously or successively, the finishing efficiency of a steel backing finishing process is improved, the finishing size of the steel backing and a high-quality bright belt are ensured, the problems of plastic deformation of the steel backing caused by forced blanking and limit clearance blanking are avoided, and the finishing of the steel backing and the surface smoothness are both considered; and thirdly, a pre-tightening mechanism is arranged in a guide device of the die, and consists of a pre-tightening spring sleeved on the guide pillar or a pre-tightening spring arranged in the guide sleeve and connected with the end part of the guide pillar, namely, the pre-tightening mechanism is leveled and recoiled, the stress between die components is balanced, the blanking stability is ensured, and further, a rubber damping block or a composite rubber spring positioned between the supporting core and the lower template can improve the bearing capacity of the positioning supporting core, reduce the loss caused by repeated stamping and prolong the service life of the die.
Drawings
Fig. 1 is a schematic view of an installation structure of a calendering anti-flying stamping die for a steel backing of the present invention;
fig. 2 is a side view of the rolling reverse-flight stamping die for the steel backing.
Detailed Description
The structure and the working principle of the rolling and anti-flying stamping die for the steel backing provided by the invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1, it is a schematic structural diagram of a steel backing calendering anti-flying stamping die provided by the present invention. The structure of the calendering reverse-flying stamping die comprises an upper die plate 1 provided with a punch 11, a middle die plate 2 provided with a reverse-flying die cavity 21 and a lower die plate 3 provided with a positioning support core 31; the punch 11 corresponds to the positioning support core 31, a guide device is arranged between the upper template 1 and the lower template 3, the recoil cavity 21 is movably sleeved outside the positioning support core 31 through the guide device, and the bottom of the middle template 2 is connected with a power ejector rod 32 penetrating through the lower template 3.
The working principle is as follows: the die is arranged in a press machine 4 (a punch press), an upper die plate 1 is connected with a movable beam 41 of the press machine, a lower die plate 3 is arranged on a workbench 42, a punch 11 (a leveling press plate) is driven by a stamping power cylinder, a power ejector rod 32 of an intermediate die plate 2 is a lifting oil cylinder in the workbench 42, a steel back to be processed is arranged on a positioning support core 31 of the lower die plate 3, the stamping power cylinder is started, the punch 11 descends to press the steel back on the positioning support core 31, the lifting power cylinder drives a recoil cavity 21 of the intermediate die plate 2 to ascend, the recoil cavity 21 is movably sleeved outside the positioning support core 31 to form a cutting edge, the edge of the steel back is further finely repaired, a bright belt of a fracture surface is improved, waste wires are removed, the punch 11 and the recoil cavity 21 complete leveling fine repair in one process, the processing efficiency is improved, a blanking gap (a distance between the recoil cavity 21 and the positioning support core 31) and a stamping force are properly adjusted, the steel backing bright band can reach more than 95 percent, and the processing quality is ensured.
In the structure constituting the rolling reverse punching die described above,
in order to improve the stability of the leveling back-flushing work of the die, the number of the four guide devices arranged in the die is four, and the four guide devices are respectively positioned at four corners of the middle die plate 2, namely the middle die plate 2 is ensured to have a constant horizontal position in the lifting process, the punch 11 and the positioning support core 31 can be completely pressed on the steel backing, meanwhile, the number of the power ejector rods 32 is two, and the two power ejector rods are respectively positioned at two sides of the middle die plate 2 in sequence, namely when the middle die plate 2 is lifted, the stress of the middle die plate 2 is balanced, and the leveling and the rolling are tight;
specifically, the guide device comprises a guide sleeve 51 arranged on the bottom surface of the upper template 1 and a guide pillar 52 located in the guide sleeve 51 and capable of stretching, the guide pillar 52 is arranged on the surface of the lower template 3, the guide pillar 52 stretches in the guide sleeve 51, and the upper, middle and lower templates always keep perpendicularity while the middle template 2 is lifted stably, so that the action of redundant external force is reduced, the working abrasion of the mold is reduced, and the service life is prolonged;
as shown in fig. 2, further, a pre-tightening mechanism is arranged in the guide device, the pre-tightening mechanism includes a pre-tightening spring 53 sleeved on the guide post 52, or the pre-tightening spring 53 is arranged in the guide sleeve 51 and connected with the end of the guide post 52, the pre-tightening spring 53 provides a buffer for the punching process, so as to prevent the die from being stressed excessively in rigidity and causing the whole instability of the die holder, meanwhile, when the pre-tightening spring 53 moves upwards in the recoil cavity 21 to cut the back edge of the steel, the blanking force application is balanced, a regular bright band is formed, and when a blanking gap is limited or very small, the die can be limited to 0.01-0.02mm and is unrelated to the material thickness, so as to ensure that no corner collapse and burr band exist on the blanking section;
preferably, a pressure-bearing elastic body 6 is arranged between the positioning support core 31 and the lower template 3, the pressure-bearing elastic body 6 is a rubber shock absorption block or a composite rubber spring, and when the recoil cavity 21 moves upwards to carry out size fine trimming on the steel backing, the punch 11 of the upper template 1 and the positioning support core 31 press and level the steel backing and are in a dynamic compression state, so that the rigid stress of the positioning support core 31 is reduced, and the abrasion of the positioning support core 31 is relieved;
in the process of pressing the steel backing by the punch 11 and the positioning support core 31 of the die, the steel backing is plastically deformed, materials flow inwards, the flatness of the product is out of tolerance due to internal stress, the pre-tightening mechanism and the pressure-bearing elastic body form a similar compound die structure, the steel backing is ensured to be always in a pressing and compacting state, an inner top structure with higher pressure is formed in a knife edge, the situation is avoided, and the flatness of the steel backing materials is improved;
because the blanking clearance of the die is extremely small, the edge of the recoil cavity 21 (knife edge) of the middle die plate 2 is easy to jump, in order to prolong the service life, the material is easier to be punched, the edge of the upper edge of the inner side of the recoil cavity 21 is provided with an arc chamfer, further, the upper side of the arc chamfer is provided with a convex edge inclined towards the positioning support core 31, the convex edge surrounds the positioning support core 31, the situation that the blanking section bright belt is influenced by outward expansion of the steel backing material in the blanking process is prevented, the convex edge can be arranged on the inner side of the arc edge and can also extend out of the arc edge to form secondary blanking, the fine blanking purpose is achieved through repeated trimming, the quality of the whole blanking section is very smooth under extremely small blanking clearance and strong pressure, almost no corner and burr exist, the die is all bright belt, and the size precision after blanking is as high as IT 6-IT 9.
Claims (6)
1. The utility model provides a calendering of steel backing flies stamping die that turns over which characterized in that: the punching die comprises an upper die plate provided with a punch, a middle die plate provided with a back-flushing cavity and a lower die plate provided with a positioning support core; the punching head corresponds to the positioning support core, a guide device is arranged between the upper template and the lower template, the recoil cavity is movably sleeved outside the positioning support core through the guide device, and the bottom of the middle template is connected with a power ejector rod penetrating through the lower template.
2. The calendering reverse-flight stamping die for steel backs as set forth in claim 1, wherein: the number of the guide devices is four, and the guide devices are respectively positioned at four corners of the middle template; the number of the power ejector rods is two, and the two power ejector rods are respectively positioned on two sides of the middle template in sequence.
3. The calendering reverse-flight stamping die for steel backs as set forth in claim 1, wherein: the guide device comprises a guide sleeve arranged on the bottom surface of the upper template and a guide post which is positioned in the guide sleeve and stretches out and draws back, and the guide post is arranged on the surface of the lower template.
4. The calendering reverse-flight stamping die for a steel backing according to claim 3, characterized in that: and a pre-tightening mechanism is arranged in the guide device and comprises a pre-tightening spring sleeved on the guide pillar, or the pre-tightening spring is arranged in the guide sleeve and is connected with the end part of the guide pillar.
5. The calendering reverse-flight stamping die for steel backs as set forth in claim 1, wherein: and a pressure-bearing elastic body is arranged between the positioning support core and the lower template, and the pressure-bearing elastic body is a rubber damping block or a composite rubber spring.
6. The calendering reverse-flight stamping die for steel backs as set forth in claim 1, wherein: the cutting edge at the upper edge of the inner side of the backflushing cavity is provided with an arc chamfer, and the upper side of the arc chamfer is provided with a convex edge inclined towards the positioning support core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023251754.4U CN214023059U (en) | 2020-12-30 | 2020-12-30 | Calendering anti-flying stamping die for steel backing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023251754.4U CN214023059U (en) | 2020-12-30 | 2020-12-30 | Calendering anti-flying stamping die for steel backing |
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| CN214023059U true CN214023059U (en) | 2021-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309238A (en) * | 2021-12-29 | 2022-04-12 | 安徽瑞荣汽车零部件有限公司 | Production process method for improving bright surface of steel back |
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2020
- 2020-12-30 CN CN202023251754.4U patent/CN214023059U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309238A (en) * | 2021-12-29 | 2022-04-12 | 安徽瑞荣汽车零部件有限公司 | Production process method for improving bright surface of steel back |
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