A double-cavity asymmetric aluminum profile bending and forming device

Abstract

The utility model discloses a double-cavity asymmetric aluminum profile bending and forming device, including an upper die and a lower die, the upper die including an upper connecting plate, a supporting vertical plate and a forming plate, the upper connecting plate and the forming plate are connected together by the supporting vertical plate, the lower die including a connecting screw, a pressing plate and two baffles, the two baffles are connected together by the connecting screw, a pin is also arranged between the two baffles, a pressing plate is arranged on the pin, a profile to be bent and formed is arranged on the pressing plate, the pressing plate and the profile are in surface contact, an upper die is arranged above the profile, and the forming plate on the upper die is in contact and connected with the profile. In the utility model, the profile and the tooling are in surface contact, that is, the pressing plate and the profile are in surface contact, so that the stress generated by the pressing plate when the profile is deformed can be effectively released, and will not be concentrated on a certain point of the profile to cause damage to the profile surface, thereby avoiding damage to the non-bending surface of the profile during the forming process.

Description

Technical Field

[0001] The utility model relates to a forming device, in particular to a double-cavity asymmetric aluminum profile bending forming device. Background Art

[0002] The aluminum alloy body of rail vehicles is mostly composed of aluminum alloy profiles, and the parts used in the body area must be bent and formed along the curvature of the body. In actual production, there is a very mature technology for bending aluminum profiles with a single cross-section, symmetry, and uniform wall thickness. Whether it is the design of tooling or the forming parameters, there are reference formulas for calculation and analysis; however, it is a difficult problem to bend aluminum profiles with multi-cavity and eccentric cross-sections. Due to the diversity of the cross-sections of multi-cavity and eccentric profiles, there is no corresponding formula reference. Most of them are designed based on experience. The forming tooling and parameters are tested many times to finally achieve the desired effect.

[0003] The door column of the passenger compartment of the rail vehicle body is a double-cavity, eccentric special-shaped aluminum profile. The outer surface of the profile is designed with a slide groove for installing the door mechanism components. The slide groove must be bent along the arc and the cross section cannot be deformed, which increases the difficulty of bending. Considering that the bending arc length of the column is small and the angle is large, rolling cannot be used, and the cost of stretch bending is high, so the press bending process is used to complete it.

[0004] When using the press-bending process to complete special-shaped aluminum profiles, most of the contact points between the profile and the tooling are point contacts. Although point contact can also bend the profile, when the upper mold presses down and applies force to the sleeves at both ends, that is, the point contact points at both ends, the stress of the profile after being subjected to downward force cannot be released, which can easily lead to deformation of the profile cross section, or cause the force points on the lower end face of the profile to be too concentrated and form pits. Utility Model Content

[0005] The technical problem to be solved by the utility model is that in the prior art, due to point contact, the stress of the profile after being subjected to downward force cannot be released, which easily leads to deformation of the profile cross section, or pits appear due to too concentrated stress points on the lower end surface of the profile.

[0006] In order to solve the above technical problems, a technical solution provided by the utility model is:

[0007] A double-cavity asymmetric aluminum profile bending and forming device comprises an upper die and a lower die, the upper die comprises an upper connecting plate, a supporting vertical plate and a forming plate, the upper connecting plate and the forming plate are connected together by the supporting vertical plate, the lower die comprises a connecting screw, a pressure plate and two baffles, the two baffles are connected together by the connecting screw, a pin is also arranged between the two baffles, a pressure plate is arranged on the pin, a profile to be bent and formed is arranged on the pressure plate, the pressure plate and the profile are in surface contact, the upper die is arranged above the profile, and the forming plate on the upper die is in contact and connected with the profile.

[0008] Furthermore, two supporting uprights are provided, and the two supporting uprights are symmetrically arranged on the lower end surface of the upper connecting plate, an upper supplementary plate is provided between the two supporting uprights near the upper connecting plate, and a transverse supporting plate is provided between the two supporting uprights and below the upper supplementary plate. The upper supplementary plate and the transverse supporting plate are used to increase the bonding force between the two supporting uprights, so that when the hydraulic cylinder presses the upper connecting plate, it is not easy for the two supporting uprights to split apart.

[0009] Furthermore, the forming plate is arranged on the lower end surfaces of the two supporting vertical plates, the width of the forming plate matches the outer diameter distance between the two supporting vertical plates, the lower end surface of the forming plate is an arc-shaped surface, and an arc-shaped groove is opened on the lower end surface along the length direction of the forming plate, and an arc-shaped avoidance groove is arranged in the arc-shaped groove along its length direction, and the dimensions of the arc-shaped groove and the arc-shaped avoidance groove match the dimensions of the profile to be processed.

[0010] Furthermore, the profile corresponding to the device is the rail vehicle body passenger compartment door column profile, and a slide is provided on the rail vehicle body passenger compartment door column profile. The avoidance groove is used to avoid the slide on the profile. On the one hand, the slide can be bent into shape, and on the other hand, it can also prevent the slide from deforming during bending.

[0011] Furthermore, the two baffles are provided with symmetrical threaded holes and pin holes, the connecting screw connects the two baffles by using the symmetrical threaded holes, the connecting screw is fixed by a nut, the symmetrical pin holes on the two baffles are connected by a pin, the pin is fixed on the baffle, the distance between the two baffles matches the width of the forming plate, and the forming plate can be placed between the two baffles.

[0012] Furthermore, there are two pins, which are arranged at both ends along the length direction of the baffle. Each pin is provided with a pressure plate, and the two pressure plates respectively correspond to the left and right ends of the position to be processed of the profile to support the profile.

[0013] Furthermore, the upper end surface of the pressure plate is a smooth plane to avoid scratching the profile surface during the bending process of the profile. Two pairs of left and right clamps are arranged on the lower end surface. The distance between each pair of clamps matches the diameter of the pin shaft. The pressure plate can be set on the pin shaft using two pairs of clamps.

[0014] Furthermore, the pressing plate can rotate around the pin shaft under the action of the two pairs of clamping plates when a downward force is applied, thereby ensuring that the pressing plate is always in surface contact with the profile. Because the angle required for rotation is not large, the pressing plate will not fall off the pin shaft during the rotation process.

[0015] Furthermore, the sum of the lengths of the two pressing plates matches the length of the forming plate, and the width of each pressing plate matches the width of the forming plate.

[0016] Furthermore, all the connecting screw rods are arranged between the baffles below the pressing plate and do not affect the bending of the profile on the pressing plate.

[0017] In the process of using the hydraulic cylinder to press down, the upper die will apply a downward force A to the profile, and the pressure plate will hold up both ends of the profile, and apply reaction forces B and C in the opposite direction of force A to the profile. Since the pressure plate has a certain length and is consistent with the width of the profile, and is in surface contact with the profile, the reaction forces B and C can be evenly applied to the profile and released through the surfaces on the two pressure plates to avoid damage to the non-bending surface of the profile during the forming process. At the same time, the sum of the lengths of the two pressure plates is consistent with the length of the forming plate, and the sum of the magnitudes of the reaction force B and the reaction force C is consistent with the magnitude of the force A. The directions of the forces are opposite, which can effectively protect the service life of the tooling mold.

[0018] The beneficial effects of the utility model are:

[0019] 1. The new type of profile is in surface contact with the tooling, that is, the pressure plate is in surface contact with the profile, so that the stress generated by the pressure plate when the profile is deformed can be effectively released, and will not be concentrated on a certain point of the profile to cause damage to the profile surface, thus avoiding damage to the non-bending surface of the profile during the forming process.

[0020] 2. In the present invention, the sum of the lengths of the two pressing plates is consistent with the length of the forming plate, the sum of the magnitudes of the reaction force B and the reaction force C is consistent with the magnitude of the action force A, and the directions of the action forces are opposite, which can effectively protect the service life of the tooling mold.

[0021] 3. The size of the lower end surface of the new forming plate matches the size of the position to be processed on the profile, which can effectively control the profile forming curvature and the profile cross-sectional shape without changing.

[0022] 4. The new middle pressure plate can rotate around the pin under the action of the paired clamping plates, thereby ensuring that when there is a downward force, the pressure plate is always in surface contact with the profile.

[0023] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only two of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is the overall structural diagram of a new type of double-cavity asymmetric aluminum profile bending and forming device;

[0026] Figure 2 This is a perspective view of the overall structure of a new type of double-cavity asymmetric aluminum profile bending and forming device;

[0027] Figure 3 This is a schematic diagram of the structure of the upper die in a new double-cavity asymmetric aluminum profile bending and forming device;

[0028] Figure 4 for Figure 3 Left view of

[0029] Figure 5 for Figure 4 Right view of;

[0030] Figure 6 This is a schematic diagram of the structure of a forming plate in a new type of double-cavity asymmetric aluminum profile bending and forming device;

[0031] Figure 7 This is a schematic diagram of the structure of the lower die in a new double-cavity asymmetric aluminum profile bending and forming device;

[0032] Figure 8 It is a schematic diagram of the structure of the pin shaft and the pressure plate inside the baffle;

[0033] Fig. 9 It is the position relationship diagram between the pin shaft, the baffle plate and the pressure plate;

[0034] Fig.10 for Figure 7 A top view of

[0035] Fig.11This is a positional relationship diagram among the new upper die, profile and pressing plate.

[0036] In the figure, 1-upper connecting plate, 2-supporting vertical plate, 3-forming plate, 3-1-arc groove, 3-2-arc avoidance groove, 4-upper supplementary plate, 5-lateral supporting plate, 6-connecting screw rod, 7-pressure plate, 8-baffle, 9-nut, 10-pin shaft, 11-splint, 12-profile. DETAILED DESCRIPTION

[0037] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0038] In the present utility model, unless otherwise clearly stipulated and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0039] The names of the messages or information exchanged between multiple devices in the implementation manner of the present utility model are only used for illustrative purposes, and are not used to limit the scope of these messages or information. Example

[0040] like Figure 1-11 As shown, a double-cavity asymmetric aluminum profile bending and forming device includes an upper mold and a lower mold, the upper mold includes an upper connecting plate 1, a supporting vertical plate 2 and a forming plate 3, two supporting vertical plates 2 are provided, and the two supporting vertical plates 2 are welded to the lower end surface of the upper connecting plate 1 in a symmetrical manner, an upper supplementary plate 4 is welded between the two supporting vertical plates 2 near the upper connecting plate 1, and a transverse support plate 5 is welded between the two supporting vertical plates 2 and below the upper supplementary plate 4.

[0041] The upper end surface of the forming plate 3 is welded to the lower end surfaces of the two supporting vertical plates 2. The width of the forming plate 3 is consistent with the outer diameter distance between the two supporting vertical plates 2. The lower end surface of the forming plate 3 is an arc-shaped surface, and an arc-shaped groove 3-1 is opened on the lower end surface along the length direction of the forming plate 3. An arc-shaped avoidance groove 3-2 is arranged in the arc-shaped groove 3-1 along its length direction. The sizes of the arc-shaped groove 3-1 and the arc-shaped avoidance groove 3-2 are consistent with the sizes of the profile 12 to be processed.

[0042] The corresponding profile 12 in this embodiment is a rail vehicle body passenger compartment door pillar profile 12 , on which a slideway is provided, and the avoidance groove is used to avoid the slideway on the profile 12 .

[0043] The lower die includes a connecting screw 6, a pressure plate 7 and two baffles 8. The two baffles 8 are symmetrically arranged. Six threaded holes and two pin holes are arranged on the two baffles 8. The threaded holes and pin holes on the two baffles 8 are symmetrically arranged. Each pair of symmetrical threaded holes between the two baffles 8 are connected by a connecting screw, and the connecting screw is fixed by a nut 9. Each pair of symmetrical pin holes are connected by a pin 10, and the pin 10 is welded to the baffle 8 to ensure that the pin 10 does not move.

[0044] The distance between the two fixed baffles 8 matches the width of the forming plate 3 , and the forming plate 3 can be placed between the two baffles 8 .

[0045] A pressing plate 7 is disposed on each of the two pin shafts 10 . The two pressing plates 7 respectively correspond to the left and right ends of the position to be processed of the profile 12 , and support the profile 12 .

[0046] The upper end surface of the pressure plate 7 is a smooth plane to avoid scratching the end surface of the profile 12 during the bending process of the profile 12. Two pairs of left and right clamps 11 are arranged on the lower end surface. The distance between each pair of clamps 11 matches the diameter of the pin 10. The pressure plate 7 can be set on the pin 10 by using two pairs of clamps 11.

[0047] Under the action of the two pairs of clamping plates 11 , the pressing plate 7 can rotate around the pin 10 when a downward force is applied, thereby ensuring that the pressing plate 7 is always in surface contact with the profile 12 .

[0048] In this embodiment, the sum of the lengths of the two pressing plates 7 is consistent with the length of the forming plate 3 , and the width of each pressing plate 7 is consistent with the width of the forming plate 3 .

[0049] During the downward pressure process using the hydraulic cylinder, a downward force A is applied to the profile 12 through the upper die, and the pressing plate 7 holds up the two ends of the profile 12, applying reaction forces B and C in the opposite direction of the force A to the profile 12. Since the sum of the lengths of the two pressing plates 7 is consistent with the length of the forming plate 3, the width of the pressing plate 7 is consistent with the width of the profile 12, and there is surface contact with the profile 12, the reaction forces B and C can be evenly applied to the profile 12 and released through the surfaces of the two pressing plates 7, so as not to be concentrated on a certain point of the profile 12 to cause damage to the surface of the profile 12, thereby avoiding damage to the non-bending surface of the profile 12 during the forming process.

[0050] During operation, the door column profile 12 is placed on the pressure plate 7 between the two baffles 8 on the lower mold. At this time, the two pressure plates 7 are in a horizontal state. The upper mold is placed on the profile 12, so that the arc groove 3-1 is aligned with the profile 12, the width of the profile 12 is consistent with the internal size of the arc groove 3-1, and the arc avoidance groove 3-2 is aligned with the slide groove on the profile 12. The hydraulic cylinder is used to apply a downward force A to the upper mold. The two pressure plates 7 tilt as the force A moves downward. At the same time, the two pressure plates 7 will also provide two opposite forces: reaction force B and reaction force C. Under the joint action of the force A, reaction force B and reaction force C, the downward force A continues to be applied until the stroke of the hydraulic cylinder reaches the predetermined stroke. At this time, the bending work of the door column profile 12 is completed and the pressing is completed.

[0051] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A double-cavity asymmetric aluminum profile bending and forming device, comprising an upper die and a lower die, characterized in that: The upper mold includes an upper connecting plate, a supporting vertical plate and a forming plate, wherein the upper connecting plate and the forming plate are connected together by the supporting vertical plate, and the lower mold includes a connecting screw, a pressing plate and two baffles, wherein the two baffles are connected together by the connecting screw, and a pin is also arranged between the two baffles, a pressing plate is arranged on the pin, and a profile to be bent and formed is arranged on the pressing plate, and the pressing plate is in surface contact with the profile, and the upper mold is arranged above the profile, and the forming plate on the upper mold is in contact with the profile.

2. The double-cavity asymmetric aluminum profile bending and forming device according to claim 1 is characterized in that: There are two supporting uprights, which are symmetrically arranged on the lower end surface of the upper connecting plate, an upper supplementary plate is arranged between the two supporting uprights near the upper connecting plate, and a transverse supporting plate is arranged between the two supporting uprights and below the upper supplementary plate.

3. The double-cavity asymmetric aluminum profile bending and forming device according to claim 2 is characterized in that: The forming plate is arranged on the lower end surfaces of the two supporting vertical plates, the width of the forming plate matches the outer diameter distance between the two supporting vertical plates, the lower end surface of the forming plate is an arc-shaped surface, and an arc-shaped groove is opened on the lower end surface along the length direction of the forming plate, and an arc-shaped avoidance groove is arranged in the arc-shaped groove along its length direction, and the sizes of the arc-shaped groove and the arc-shaped avoidance groove match the sizes of the profile to be processed.

4. A double-cavity asymmetric aluminum profile bending and forming device according to claim 1 or 3, characterized in that: Symmetrical threaded holes and pin holes are provided on the two baffles. The connecting screw connects the two baffles by using the symmetrical threaded holes, and the connecting screw is fixed by a nut. The symmetrical pin holes on the two baffles are connected by a pin, and the pin is fixed on the baffle. The distance between the two baffles matches the width of the forming plate.

5. The double-cavity asymmetric aluminum profile bending and forming device according to claim 4 is characterized in that: There are two pins, which are arranged at both ends along the length direction of the baffle. Each pin is provided with a pressure plate. The two pressure plates respectively correspond to the left and right ends of the position to be processed of the profile to hold up the profile.

6. The double-cavity asymmetric aluminum profile bending and forming device according to claim 5 is characterized in that: The upper end surface of the pressure plate is a smooth plane, and a pair of clamping plates are arranged on the lower end surface. The distance between each pair of clamping plates matches the diameter of the pin shaft. The pressure plate can be arranged on the pin shaft by using the pair of clamping plates.

7. The double-cavity asymmetric aluminum profile bending and forming device according to claim 6 is characterized in that: Under the action of the paired clamping plates, the pressing plate can rotate around the pin shaft when a downward force is applied, thereby ensuring that the pressing plate is always in surface contact with the profile.

8. The double-cavity asymmetric aluminum profile bending and forming device according to claim 7 is characterized in that: The sum of the lengths of the two pressing plates matches the length of the forming plate, and the width of each pressing plate matches the width of the forming plate.

Images