A U-supporting mechanism for a bending machine

Abstract

The present invention discloses a U-supporting mechanism of a bending machine, which includes a base, a follower platform movably arranged on the base, and a U-supporting assembly arranged on the follower platform, wherein the U-supporting assembly includes at least two stacked support plates, wherein the bottom support plate is a reference support plate, and the remaining support plates are follower support plates that can move left and right relative to the reference support plate, and the same side of all support plates is provided with a U-supporting portion capable of supporting a U-tube at the end of a workpiece, and the U-supporting assembly also includes a movable connection structure capable of movably connecting all support plates together to limit the separation of each support plate from each other. The present invention can support the U-tube at the end of a heat exchanger during the process of bending a workpiece, and prevent the fin from being damaged during the bending process.

Description

Technical Field

[0001] The invention relates to the technical field of bending machines, in particular to a U-supporting mechanism of a bending machine. Background Art

[0002] In the field of air conditioning parts production, the heat exchanger needs to be bent according to the shape of the air conditioner, such as bending the plate heat exchanger once into an L shape, bending it twice into a U shape, or bending it three times into a G shape. In the bending process of the air conditioning heat exchanger, the heat exchanger is first transported to the set position so that the part to be bent is close to the roller, and then the heat exchanger is clamped so that the heat exchanger is bent close to the curved surface of the roller.

[0003] For a workpiece made of at least two layers of heat exchangers, the bending radius of each layer of heat exchangers is different during the bending process. Therefore, during the bending process, the inner layer of the heat exchanger and the outer layer of the heat exchanger will slide relative to each other. In order to prevent the two adjacent layers of heat exchangers from rubbing against each other and crushing the fins, the prior art generally adopts the following solution, that is, before the bending operation, a plastic sheet is manually placed between the two heat exchangers to prevent the two heat exchangers from rubbing against each other and crushing the fins. This solution requires more manual intervention, has a low degree of automation, and increases labor costs. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a U-supporting mechanism applied to a bending machine, which can support the U-tube at the end of a heat exchanger during the bending process and avoid damage to the fins during the bending process.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A U-supporting mechanism of a bending machine comprises a base, a follower platform movably arranged on the base leftward and rightward, and a U-supporting assembly arranged on the follower platform, wherein the U-supporting assembly comprises at least two stacked pallets, wherein the bottommost pallet is a reference pallet, and the remaining pallets are follower pallets movably arranged leftward and rightward relative to the reference pallet, a U-supporting portion capable of supporting a U-tube at an end of a workpiece is arranged on the same side of all pallets, and the U-supporting assembly also comprises a movable connection structure capable of movably connecting all pallets together to limit the separation of the pallets from each other.

[0007] In a preferred embodiment of the present invention, the movable connection structure includes: an elongated hole arranged on the follower pallet, a limiting column passing through the elongated holes of all the follower pallets and connected to the reference pallet, the upper end of the limiting column is provided with a limiting block capable of limiting the upward movement of the follower pallet, and the elongated holes are arranged along the left and right directions so that the follower pallet can move left and right relative to the reference pallet.

[0008] In a preferred embodiment of the present invention, the servo platform is provided with a horizontal driver capable of driving the U-supporting assembly to move left and right on the servo platform so that each U-supporting part supports the corresponding U tube.

[0009] In a preferred solution of the present invention, the output end of the horizontal driver is connected to a movable bracket capable of moving left and right relative to the follower platform, and the reference support plate is arranged on the movable bracket.

[0010] In a preferred embodiment of the present invention, the movable bracket includes: a horizontal movable frame capable of moving left and right under the follow-up platform, a lifting frame arranged on the horizontal movable frame, and a lifting drive capable of driving the lifting frame to move up and down, and the reference support plate is arranged on the lifting frame, so that the support U assembly can switch between two positions: extending above the upper surface of the follow-up platform and being stored below the upper surface of the follow-up platform.

[0011] In a preferred embodiment of the present invention, a gap is provided on one side of the follower platform, through which the upper end of the lifting frame can pass and move left and right. When the upper end of the lifting frame is located in the gap, the support U assembly can be supported on the upper surface of the follower platform.

[0012] In a preferred embodiment of the present invention, a guide mechanism capable of guiding left and right is provided between each two adjacent support plates.

[0013] In a preferred embodiment of the present invention, the guide mechanism comprises a slide groove provided on a support plate and capable of guiding left and right, and a slider provided on an adjacent support plate and cooperating with the slide groove.

[0014] In a preferred embodiment of the present invention, a guide member capable of guiding left and right is provided on the base, and the follower platform is slidably provided on the guide member through a slide seat, so that the workpiece supported on the follower platform can drive the follower platform to move along the guide member through static friction.

[0015] The beneficial effect of the present invention is as follows: taking a workpiece composed of three layers of heat exchangers as an example, the left ends of the three layers of heat exchangers are connected together by side plates, and the right ends are not connected to each other; accordingly, the support plates should also be blocks, of which the bottom support plate is the reference support plate, and the other two support plates are follower support plates. Before the bending operation, the drive device drives the workpiece to move to the right or the support U assembly to move to the left, so that the U tube on the right side of the layer heat exchanger is supported on the support U part of the three support plates, and the left end of the support U part is pressed against the left end face of the corresponding heat exchanger. The state at this time is as follows: Figure 2 As shown; then the left part of the workpiece is clamped by a fixture, and then the workpiece is bent close to the curved surface of the roller. During this process, the right end of the upper two layers of heat exchangers will push the corresponding follower support plate to the right, and finally form Figure 3 During the bending process, since the U-tube on the right side of each heat exchanger is supported on the corresponding support plate, the U-tube is the main force point, so the fin will not be subjected to large vertical pressure and large horizontal friction during the bending process, which can avoid damage to the fin, which is beneficial to improving the yield rate, and there is no need to manually pad plastic sheets between each heat exchanger, which also improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the whole of the present invention in the first working condition;

[0017] Figure 2 It is a front view of the main part of the present invention in the second working condition;

[0018] Figure 3 It is a front view of the main part of the present invention in the third working condition;

[0019] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0020] Figure 5 It is a cross-sectional view of the support U assembly in the second working condition;

[0021] Figure 6 It is a cross-sectional view of the support U assembly in the third working condition;

[0022] Figure 7 It is an exploded view of the main part of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the guide mechanism between the pallets. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "preferred" and "sub-preferred" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Reference Figures 1 to 8 The present invention proposes a U-supporting mechanism of a bending machine, which includes a base 9, a follower platform 1 movably arranged on the base 9, and a U-supporting assembly 2 arranged on the follower platform 1, the U-supporting assembly 2 includes at least two stacked pallets, wherein the bottommost pallet is a reference pallet 21, and the remaining pallets are follower pallets 22 that can move left and right relative to the reference pallet 21, and a U-supporting portion 201 capable of supporting a U tube 301 at the end of a workpiece 3 is provided on the same side of all the pallets, and the U-supporting assembly 2 also includes a movable connection structure that can movably connect all the pallets together to limit the separation of the pallets from each other.

[0027] Reference Figure 1 A guide member 91 capable of guiding left and right is provided on the base 9. The guide member 91 can be a guide rail or a guide column. The follower platform 1 is slidably provided on the guide member 91 through a slide seat 92, so that the workpiece 3 supported on the follower platform 1 can be driven by static friction to move along the guide member 91.

[0028] Reference Figures 2 to 4 In this embodiment, the U-supporting portion 201 is arranged on the left side of the pallet. Taking the workpiece 3 composed of three layers of heat exchangers 31 as an example, the left ends of the three layers of heat exchangers 31 are connected together by the side plates 32, and the right ends are not connected to each other; accordingly, three pallets should also be used, among which the bottom layer of pallets is the reference pallet 21, and the other two pallets are follower pallets 22. Before the bending operation, the workpiece 3 is driven to move to the right or the U-supporting assembly 2 is driven to the left by the driving device, so that the U-tube 301 on the right side of the three-layer heat exchanger 31 is supported on the U-supporting portion 201 of the three pallets, and the left end of the U-supporting portion 201 is pressed against the corresponding left end face of the heat exchanger 31. The state at this time is as shown in FIG. Figure 2As shown; then the left part of the workpiece is clamped by a fixture, and then the workpiece is bent and formed close to the arc surface of the roller 4. During this process, the follower platform 1 moves left and right with the bottom layer of the heat exchanger 31, the reference support plate 21 and the follower platform 1 are relatively stationary, and the right ends of the two upper layers of the heat exchanger 31 will push the corresponding follower support plate 22 to the right, and finally form Figure 3 During the bending process, since the U-tube 301 on the right side of each heat exchanger 31 is supported on the corresponding support plate, the U-tube 301 is the main force point, so the fins will not be subjected to large vertical pressure and large horizontal friction during the bending process, which can avoid damage to the fins, which is beneficial to improving the yield rate, and there is no need to manually pad plastic sheets between each heat exchanger 31, which also improves work efficiency.

[0029] Reference Figure 5 and Figure 6 As a preferred solution of the present invention, the movable connection structure includes: an elongated hole 221 provided on the follower support plate 22, a limiting column 23 passing through the elongated holes 221 of all the follower support plates 22 and connected to the reference support plate 21, a limiting block 231 capable of limiting the upward movement of the follower support plate 22 is provided at the upper end of the limiting column 23, and the elongated holes 221 are arranged along the left-right direction so that the follower support plate 22 can move left and right relative to the reference support plate 21. Optionally, the limiting column 23 adopts a screw, the threaded end of the screw is connected to the reference support plate 21, and the head of the screw serves as the above-mentioned limiting block 231. Before supporting the U-tube 301, the state of the supporting U assembly 2 is as follows: Figure 5 As shown, at this time, the limiting column 23 is located at the rightmost end of each elongated hole 221. After bending, the state of the support U assembly 2 is as follows Figure 6 As shown, after the workpiece is unloaded, a fixed stopper can be set on the right side of the follower support plate 22, and the support U assembly 2 can be moved to the right to press each follower support plate 22 to the top through the stopper. Figure 5 In the state shown, the follower support plate 22 can also be driven to move to the Figure 5 Status shown.

[0030] In one solution of the present invention, a horizontal driver is provided to drive the U-supporting assembly 2 to move left and right on the follower platform 1 so that each U-supporting portion 201 supports the corresponding U-tube 301. In this solution, the horizontal driver adopts a motor (not shown) disposed under the follower platform 1, and the motor drives the U-supporting assembly 2 to move left and right through a screw pair, and the U-tube 301 on the right side of the heat exchanger 31 is supported on the corresponding support plate by the left and right movement of the U-supporting assembly 2.

[0031] Reference Figure 7 The output end of the motor is connected to a movable bracket 5 that can move left and right relative to the follower platform 1 , and the reference support plate 21 is arranged on the movable bracket 5 .

[0032] Furthermore, the movable bracket 5 includes: a horizontal moving frame 51 capable of moving left and right below the follower platform 1, a lifting frame 52 arranged on the horizontal moving frame 51, and a lifting driver 53 capable of driving the lifting frame 52 to move up and down. Preferably, the lifting driver 53 adopts a cylinder, and the reference support plate 21 is arranged on the lifting frame 52, so that the support U component 2 can switch between two positions: extending above the upper surface of the follower platform 1 and being stored below the upper surface of the follower platform 1. This design allows the support U component 2 to be stored below the upper surface of the follower platform 1 or at the same height as the upper surface of the follower platform 1. At this time, the state is as follows: Figure 1 As shown, in this state, the present invention can be loaded from the right.

[0033] Reference Figure 7 A notch 11 is provided on one side of the follower platform 1, through which the upper end of the lifting frame 52 can pass and move left and right. The advantage of this design is that during the bending process of the workpiece 3, the follower platform 1 provides support for the support U assembly, which can improve the load capacity of the support U assembly.

[0034] In order to guide the support plates, a guide mechanism capable of guiding left and right is arranged between each two adjacent support plates.

[0035] Reference Figure 8 The guide mechanism includes a slide groove 202 which is arranged on a support plate and can guide left and right, and a slider 203 which is arranged on an adjacent support plate and cooperates with the slide groove 202.

[0036] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A U-supporting mechanism for a bending machine, characterized in that: It comprises a base (9), a follower platform (1) movably arranged on the base (9), and a U-supporting assembly (2) arranged on the follower platform (1), wherein the U-supporting assembly (2) comprises at least two stacked support plates, wherein the bottom support plate is a reference support plate (21), and the remaining support plates are all follower support plates (22) movably arranged relative to the reference support plate (21), wherein a U-supporting portion (201) capable of supporting a U tube (301) at the end of a workpiece (3) is arranged on the same side of all the support plates, and the U-supporting assembly (2) further comprises a movable connection structure capable of movably connecting all the support plates together to prevent the respective support plates from being separated from each other; The movable connection structure comprises: an elongated hole (221) provided on the follower support plate (22), a limiting column (23) passing through the elongated holes (221) of all the follower support plates (22) and connected to the reference support plate (21), a limiting block (231) capable of limiting the upward movement of the follower support plate (22) being provided at the upper end of the limiting column (23), and the elongated holes (221) being arranged along the left-right direction so that the follower support plate (22) can move left-right relative to the reference support plate (21); The base (9) is provided with a guide member (91) capable of guiding left and right, and the follower platform (1) is slidably arranged on the guide member (91) via a slide seat (92), so that the workpiece (3) supported on the follower platform (1) can drive the follower platform (1) to move along the guide member (91) through static friction force; The workpiece (3) comprises at least two layers of heat exchangers (31), the U-tubes (301) are respectively arranged at the ends of the corresponding heat exchangers (31), and when the U-tubes (301) are bent and formed, the follower platform (1) can move left and right along with the heat exchanger (31) at the bottom layer, the reference support plate (21) and the follower platform (1) are relatively stationary, and the right end of the heat exchanger (31) on the upper layer of the reference support plate (21) pushes the corresponding follower support plate (22) to the right.

2. The U-supporting mechanism of a bending machine according to claim 1, characterized in that: The servo platform (1) is provided with a horizontal driver capable of driving the U-supporting assembly (2) to move left and right on the servo platform (1) so that each U-supporting part (201) supports the corresponding U tube (301).

3. The U-supporting mechanism of a bending machine according to claim 2, characterized in that: The output end of the horizontal driver is connected to a movable bracket (5) capable of moving left and right relative to the follower platform (1), and the reference support plate (21) is arranged on the movable bracket (5).

4. The U-supporting mechanism of a bending machine according to claim 3, characterized in that: The movable bracket (5) comprises: a horizontal movable frame (51) capable of moving left and right below the follower platform (1), a lifting frame (52) arranged on the horizontal movable frame (51), and a lifting driver (53) capable of driving the lifting frame (52) to move up and down. The reference support plate (21) is arranged on the lifting frame (52), so that the support U assembly (2) can switch between two positions: extending above the upper surface of the follower platform (1) and being accommodated below the upper surface of the follower platform (1).

5. The U-supporting mechanism of a bending machine according to claim 4, characterized in that: A notch (11) is provided on one side of the follower platform (1) so that the upper end of the lifting frame (52) can pass through and move left and right therein; when the upper end of the lifting frame (52) is located in the notch (11), the support U assembly can be supported on the upper surface of the follower platform (1).

6. The U-supporting mechanism of a bending machine according to claim 1, characterized in that: A guide mechanism capable of guiding left and right is arranged between each two adjacent support plates.

7. The U-supporting mechanism of a bending machine according to claim 6, characterized in that: The guide mechanism comprises a slide groove (202) arranged on a support plate and capable of guiding left and right, and a sliding block (203) arranged on an adjacent support plate and cooperating with the slide groove (202).

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