Pre-bending device for aluminum alloy draw-bar box body

Abstract

The utility model discloses a pre-bending device for an aluminum alloy draw-bar box body, belongs to the technical field of box body processing, and solves the problems that the aluminum alloy draw-bar box body needs to be bent, so that the aluminum alloy is obviously rebounded after being stamped and bent, and the internal stress is concentrated. Comprising a frame body, an upper cross beam and a lower cross beam, before the aluminum alloy draw-bar box body needs to be bent, the aluminum alloy draw-bar box body can be pre-bent, the aluminum alloy draw-bar box body is placed on the die strip, and the die strip is heated by using the heating assembly as a heat source, so that the box body can be heated in advance, and the aluminum alloy draw-bar box body is prevented from being damaged. The pre-pressing head is pressed downwards through the air cylinder to act on the heated box body, so that the box body is bent in a small range, the subsequent box body can be further bent, the return range after bending is reduced, and meanwhile, the internal stress after bending can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of box body processing, in particular to an aluminum alloy pull rod box body pre-bending device. Background Art

[0002] Press bending is the main aluminum alloy tie rod box bending technology that is widely used at present. In this technology, by using a specially designed mold, the aluminum alloy sheet is first accurately placed on the punch press, and then appropriate pressure is applied to bend the sheet into a predetermined shape. Due to its high efficiency, this technology is very suitable for large-scale, batch bending tasks.

[0003] Since any material has a certain elastic rebound performance, after the aluminum alloy tie rod box is bent by the stamping bending machine, due to the characteristics of the aluminum alloy material, the aluminum alloy tie rod box after stamping will move in the opposite direction and cannot be completely bent. Secondly, internal stress will appear inside due to stamping and bending. If the subsequent heat treatment process is not properly carried out, the obtained aluminum alloy tie rod box will be easily damaged at the internal stress concentration point under the impact of external force.

[0004] Therefore, it is necessary to bend the aluminum alloy tie rod box to take into account the obvious rebound of the aluminum alloy after stamping and bending, as well as the internal stress concentration problem.

[0005] Therefore, an aluminum alloy tie rod box pre-bending device is proposed to solve or alleviate the above problems. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings existing in the prior art, and the proposed aluminum alloy trolley case pre-bending device adopts a pre-bending method before bending the trolley case made of aluminum alloy. The case is placed on a mold bar, and the mold bar is heated by a heating component to soften the case. The pre-pressing head is pressed down by a cylinder to make it bend slightly to facilitate further bending later, while reducing the recovery amplitude after bending and reducing internal stress.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An aluminum alloy tie rod box pre-bending device includes a frame, an upper beam and a lower beam fixedly connected to the frame, a vertically displaceable pre-pressing head is arranged below the upper beam, a mold strip cooperating with the pre-pressing head is arranged on the top surface of the lower beam, and a heating component for heating the top surface of the mold strip is arranged between the mold and the lower beam.

[0009] Preferably, the cross section of the mold bar is X-shaped, a deformation groove cooperating with the pre-pressing head is formed on the top surface of the mold bar, and a receiving groove for receiving the heating component is formed between the bottom surface of the mold bar and the lower cross beam.

[0010] Preferably, there are embedding grooves of equal length on both sides of the mold bar, and both sides of the mold bar are fixedly connected with heat insulation strips that can be embedded in the embedding grooves.

[0011] Preferably, the heating component is an electric heating wire, and the electric heating wire is in contact with the groove wall of the containing groove.

[0012] Preferably, a plurality of connection seats are detachably connected to the lower cross beam via vertical bolts, and the connection seats are detachably connected to the mold strips after the horizontal bolts penetrate the heat insulation strips.

[0013] Preferably, a vertically arranged cylinder is fixedly connected to the bottom surface of the upper cross beam, a piston rod of the cylinder is fixedly connected to a U-shaped fixing seat, clamping plates are arranged on both sides of the thickness direction of the pre-pressing head, the clamping plates and the pre-pressing head are both embedded in the fixing seat, and the two are fixed by bolts and nuts.

[0014] Preferably, two sides of the frame are fixedly connected with vertically arranged slide rails by bolts, and two ends of the pre-pressing head are slidably connected in the slide rails.

[0015] The utility model has the following beneficial effects:

[0016] Before bending the trolley case body made of aluminum alloy, the utility model adopts a pre-bending action to optimize the bending process. Specifically, the trolley case body made of aluminum alloy is first placed on the mold bar, and then the mold bar is heated by a heating component as a heat source. This heating method can pre-heat the case body and soften its material. After the preheating is completed, the pre-pressing head is pressed down by the cylinder to act on the heated case body, so that it is bent in a small range of a certain amplitude. This pre-bending operation is helpful for the subsequent bending process, reduces the recovery amplitude after bending, and can also reduce the internal stress generated by bending.

[0017] This pre-bending method can improve the flexibility of the box body through the combined operation of preheating and pre-bending, making it easier to perform further bending processing. At the same time, since the pre-bending process can reduce the rebound amplitude and internal stress, the final trolley case has better stability and bending resistance. It can not only improve the accuracy and stability of the bending process, but also reduce the adverse effects of bending on the product, providing a more optimized improvement for the production process of trolley cases. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0021] Figure 4 for Figure 1 Enlarged view of point C in the middle.

[0022] 1. Frame; 2. Lower crossbeam; 3. Upper crossbeam; 4. Cylinder; 5. Pre-pressing head; 6. Clamp; 7. Mould strip; 71. Deformation groove; 72. Accommodating groove; 73. Embedding groove; 8. Connecting seat; 81. Vertical bolt; 82. Horizontal bolt; 9. Insulation strip; 10. Slide rail; 11. Fixed seat. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Aluminum alloy drawbar box pre-bending device, such as Figure 1 As shown, it includes a frame 1, an upper beam 3 and a lower beam 2 fixedly connected to the frame 1, a pre-pressing head 5 capable of vertical displacement is arranged below the upper beam 3, and a vertically arranged cylinder 4 is fixedly connected to the bottom surface of the upper beam 3, as shown in FIG. Figure 4 As shown, the piston rod of the cylinder 4 is fixedly connected to a U-shaped fixing seat 11, and clamping plates 6 are arranged on both sides of the thickness direction of the pre-pressing head 5. The clamping plates 6 and the pre-pressing head 5 are both embedded in the fixing seat 11, and the two are fixed by bolts and nuts. Figure 3 As shown, two sides of the frame 1 are fixedly connected with vertically arranged slide rails 10 by bolts, and two ends of the pre-pressing head 5 are slidably connected in the slide rails 10 .

[0025] like Figure 2 As shown, a silicone rubber layer is bonded to the top surface of the lower cross beam 2, and a mold strip 7 cooperating with the pre-pressing head 5 is provided on the top surface of the lower cross beam 2. Specifically, a plurality of connecting seats 8 are detachably connected to the lower cross beam 2 through vertical bolts 81, and the connecting seats 8 are detachably connected to the mold strip 7 after penetrating the thermal insulation strip 9 through horizontal bolts 82. The cross section of the mold strip 7 is X-shaped, and a deformation groove 71 cooperating with the pre-pressing head 5 is formed on the top surface of the mold strip 7. A receiving groove 72 for accommodating a heating component is formed between the bottom surface of the mold strip 7 and the lower cross beam 2. There are embedding grooves 73 of the same length on both sides of the mold strip 7. Insulation strips 9 that can be embedded in the embedding grooves 73 are fixedly connected on both sides of the mold strip 7. The thermal insulation strip 9 is made of silicone rubber. A heating component for heating the top surface of the mold strip 7 is provided between the mold and the lower cross beam 2. The heating component is an electric heating wire, and the electric heating wire is in contact with the groove wall of the receiving groove 72.

[0026] The frame 1, the upper crossbeam 3, the lower crossbeam 2, the pre-pressing head 5, the clamping plate 6, the fixing seat 11, the slide rail 10 and the mold strip 7 are all made of carbon steel.

[0027] When people need to use the aluminum alloy tie rod box pre-bending device, they only need to place the aluminum alloy tie rod box that needs to be pre-bent into the pre-bending device, so that the box is placed on the top surface of the mold strip 7, and energize the heating wire to generate heat to heat the mold strip 7. Then people only need to start the cylinder 4 so that the cylinder 4 can drive the pre-pressing head 5 to move downward through the fixed seat 11 and the splint 6.

[0028] During the downward displacement of the pre-pressure head 5, the pre-pressure head 5 is restricted by the slide rails 10 at both ends, so that it is relatively stable and less likely to shake when displacing in the vertical direction. At the same time, it can also more accurately find the position where the force is applied to the box body, avoiding the possibility of force deviation during the force application process.

[0029] Then the pre-pressing head 5 will perform a small stamping deformation on the deformation groove 71 in the mold strip 7 of the box body, and in this process, the pre-pressing head 5 will cooperate with the mold strip 7 to bite the box body for a period of time. In this process, the box body will adapt to its deformation and contact with the deformation groove 71 of the mold strip 7 to transfer heat, thereby eliminating the internal stress inside it, and then the box body will complete the pre-bending action, so that when it is further bent later, it will not rebound significantly due to the elastic deformation properties of the material itself due to a large degree of deformation, nor will it be unable to maintain its bent shape due to the internal stress inside, so that the processed box body can obtain a high-quality trolley case after production.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Aluminum alloy tie rod box pre-bending device, characterized in that: The invention comprises a frame (1), an upper crossbeam (3) and a lower crossbeam (2) fixedly connected to the frame (1); a pre-pressing head (5) capable of vertical displacement is arranged below the upper crossbeam (3); a mold bar (7) cooperating with the pre-pressing head (5) is arranged on the top surface of the lower crossbeam (2); a heating component for heating the top surface of the mold bar (7) is arranged between the mold bar (7) and the lower crossbeam (2); the cross section of the mold bar (7) is X-shaped; a deformation groove (71) cooperating with the pre-pressing head (5) is formed on the top surface of the mold bar (7); and a receiving groove (72) for receiving the heating component is formed between the bottom surface of the mold bar (7) and the lower crossbeam (2).

2. The aluminum alloy tie rod box pre-bending device according to claim 1, characterized in that: There are embedding grooves (73) of equal length on both sides of the mold bar (7), and heat insulation strips (9) that can be embedded in the embedding grooves (73) are fixedly connected to both sides of the mold bar (7).

3. The aluminum alloy tie rod box pre-bending device according to claim 1, characterized in that: The heating component is an electric heating wire, and the electric heating wire is in contact with the groove wall of the containing groove (72).

4. The aluminum alloy tie rod box pre-bending device according to claim 2, characterized in that: A plurality of connection seats (8) are detachably connected to the lower cross beam (2) via vertical bolts (81); the connection seats (8) are detachably connected to the mold strip (7) after penetrating the heat insulation strip (9) via horizontal bolts (82).

5. The aluminum alloy tie rod box pre-bending device according to claim 1, characterized in that: The bottom surface of the upper cross beam (3) is fixedly connected to a vertically arranged cylinder (4), the piston rod of the cylinder (4) is fixedly connected to a U-shaped fixing seat (11), clamping plates (6) are arranged on both sides of the pre-pressing head (5) in the thickness direction, the clamping plates (6) and the pre-pressing head (5) are both embedded in the fixing seat (11), and the two are fixed by bolts and nuts.

6. The aluminum alloy tie rod box pre-bending device according to claim 1, characterized in that: Both sides of the frame (1) are fixedly connected with vertically arranged slide rails (10) by means of bolts, and both ends of the pre-pressing head (5) are slidably connected in the slide rails (10).

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