Cloth rod welding fixture and control method thereof

Abstract

The application discloses a cloth rod welding clamp and a control method thereof, and belongs to the technical field of polyurethane production. The cloth rod comprises a first half rod body and a second half rod body, the first half rod body and the second half rod body respectively comprise oppositely arranged to-be-welded plate bodies, the to-be-welded plate bodies comprise oppositely arranged first surfaces and second surfaces, and part of the first surfaces is to-be-welded surfaces; the welding clamp comprises: a support piece movably supported on the first surfaces of the to-be-welded plate bodies, the support piece being movable along a first direction; a pressing piece movably pressed on the second surfaces of the to-be-welded plate bodies, the pressing piece being movable along the first direction and a second direction, the first direction and the second direction being perpendicularly arranged; and a heating plate used for heating the to-be-welded surfaces of the to-be-welded plate bodies, the heating plate being movable between an initial position and a heating position, and the heating plate being moved to be located between the to-be-welded plate body of the first half rod body and the to-be-welded plate body of the second half rod body in the heating position. The application can improve the welding strength of the cloth rod and has relatively high compatibility.

Description

Technical Field

[0001] This invention relates to the field of polyurethane production technology, and in particular to a welding fixture and control method for a fabrication device for continuous polyurethane production. Background Technology

[0002] As one of the key pieces of equipment in the continuous production of polyurethane foam, the design of the fabric bar determines the uniformity of fabric application and the service life of the fabric bar. The uniformity of fabric application is related to the density distribution, mechanical and thermal properties of the product, as well as the possibility of problems such as hollowness and creases. The service life of the fabric bar is related to the frequency and difficulty of cleaning or replacing the fabric application equipment, which ultimately affects the production efficiency and cost of polyurethane foam.

[0003] In the design of a fabric placing boom, the flow channel design is crucial for achieving uniform fabric distribution over a long period. Its flow channel typically includes an inlet and multiple outlets located on the main flow channel. Usually, the length of the main flow channel is much larger than its cross-sectional dimensions. Due to current manufacturing limitations, the fabric placing boom needs to be divided into two parts along the main flow channel (the upper part contains the inlet and part of the main flow channel, and the lower part contains part of the main flow channel and multiple outlets, with the dividing line being the axis of the main flow channel). The upper and lower parts are injection molded separately and then welded together to form a single product.

[0004] The current design of the welding fixture for the fabric placing boom is similar to that of the front and rear molds of the injection mold, ensuring a close fit between the plastic product surface and the fixture surface. However, the following problems exist in practical applications: 1. After molding, the injection-molded product warps and deforms, making it difficult to place into the welding fixture. This leads to fixture failure and the inability to weld the product. While increasing the gap allows for placement, it easily results in misalignment. 2. Warping of the injection-molded product causes inconsistencies in the relative states of the welding groove and the hot plate during welding, as well as inconsistent material melting states. This results in issues such as incomplete welds or localized over-welding and overflow, leading to poor weld strength and significant differences between the flow channel shape and dimensions and the design values. Consequently, the welded fabric placing boom experiences problems such as material leakage, uneven material distribution, and short lifespan during the material distribution process. 3. The fixture has poor compatibility. Different specifications, especially different lengths, cannot share the same welding fixture, requiring separate design and manufacturing, resulting in long development cycles and high equipment investment. Summary of the Invention

[0005] Therefore, this invention proposes a welding fixture for a fabric rod that can improve the welding strength of the fabric rod and has strong compatibility.

[0006] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0007] A fabric rod welding fixture includes a fabric rod comprising a first half-rod and a second half-rod, each half-rod comprising a plate to be welded disposed opposite to each other, the plate to be welded comprising a first surface and a second surface disposed opposite to each other, a portion of the first surface being the surface to be welded; the welding fixture comprises: a support member movably supported on the first surface of the plate to be welded, the support member being movable along a first direction; a pressing member movably pressed on the second surface of the plate to be welded, the pressing member being movable along the first direction and a second direction, the first direction being perpendicular to the second direction; and a heating plate for heating the surface to be welded of the plate to be welded, the heating plate being movable between an initial position and a heating position, wherein, in the heating position, the heating plate is moved to a position between the plate to be welded of the first half-rod and the plate to be welded of the second half-rod.

[0008] In some embodiments of the present invention, the fabric rod is provided with fins perpendicular to the second surface of the plate to be welded, and the welding fixture further includes: a clamping member, which is movably clamped on both sides of the fins of the plate to be welded, and the clamping member can move along a first direction and a second direction.

[0009] In some embodiments of the present invention, the support member and the pressing member are both L-shaped plates, which together form a receiving space for accommodating the plate to be welded.

[0010] In some embodiments of the present invention, the pressing member is provided with a waist-shaped hole suitable for the fins of the fabric rod to pass through.

[0011] In some embodiments of the present invention, the clamping member is a plurality of clamping plates spaced apart along the length of the fabric rod, and each set of clamping plates moves toward or away from each other.

[0012] In some embodiments of the present invention, the support member, the pressing member, the heating plate, and the clamping member move linearly under the action of different linear drive terminals.

[0013] This invention also provides a control method using the above-mentioned fabric rod welding fixture, comprising the following steps:

[0014] S1. The two support members with the control interval are moved from the initial position to the pressing position along the first direction, so that the first half-rod and the first surface of the second half-rod are respectively placed on the surface of the two support members;

[0015] S2. Control the two pressing parts to move from the initial position to the pressing position along the second direction, and press the second surface of the first half rod and the second half rod until there is no gap between the first surface of the first half rod and the first surface of the second half rod and the supporting surface of the support member;

[0016] S3. Control the heating plate to move along the first direction to the heating station, control the two support members to move along the first direction to the initial position, control the pressing member to move along the second direction, so that the welding surface of the first half rod and the welding surface of the second half rod come into contact with the heating plate, and turn on the heating plate to heat the welding surface of the fabric rod;

[0017] S4. Control the heating plate to move to the initial position along the first direction, and control the pressing member to move along the second direction so that the welding surface of the first half-rod body contacts and welds with the welding surface of the second half-rod body.

[0018] In some embodiments of the present invention, the fabric rod is provided with fins perpendicular to the second surface of the plate to be welded, and the control method further includes: between step S2 and step S3, controlling the clamping member to move along the first direction until it clamps the two sides of the fins.

[0019] In some embodiments of the present invention, the support member is an L-shaped plate, which includes a first support plate extending along a first direction and a second support plate extending along a second direction; after controlling two pressing members to move along the second direction until they are respectively inserted and connected to the first half-rod and the second half-rod and are located at the pressing position, the two pressing members are controlled to move along the first direction so that the side walls of the first half-rod and the second half-rod respectively abut against the second support plates of the two support members.

[0020] In some embodiments of the present invention, the pressing member is an L-shaped plate, which includes a third support plate extending along a first direction and a fourth support plate extending along a second direction; after the pressing member moves to the pressing position, the pressing member is controlled to move along the first direction, so that the side walls of the first half-rod and the second half-rod respectively abut against the fourth support plate of the pressing member.

[0021] The technical solution of the present invention has the following technical effects compared with the prior art:

[0022] The fabric rod welding fixture provided by this invention can straighten deformed fabric rods to be welded through the cooperation of support and pressing components. This avoids the problem of injection-molded semi-finished products being difficult to place into the welding fixture due to warping and deformation, leading to fixture failure and inability to weld the product. Straightening before welding improves welding quality, resulting in uniform fabric distribution and a longer service life during the fabric application process. Furthermore, this welding fixture has an online straightening function, allowing for direct entry into the welding process after straightening without the need for final shaping, thus increasing production efficiency. In addition, the welding fixture adopts a highly compatible split-type fixture design, allowing for the use of the same welding fixture for different specifications of fabric rods, especially different lengths, reducing production costs. Attached Figure Description

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0024] Figure 1 This is a schematic diagram of a specific embodiment of the fabric rod welding fixture of the present invention;

[0025] Figure 2 This is a schematic diagram of a specific embodiment of the fabric rod of the present invention;

[0026] Figure 3 This is a schematic diagram of the fabric rod welding fixture of the present invention correcting the first half of the rod.

[0027] Figure 4 This is a schematic diagram of the fabric rod welding fixture of the present invention shaping the second half of the rod;

[0028] Figure 5 This is a schematic diagram of the structure of the fabric rod welding fixture of the present invention when the heating plate is located in the heating position;

[0029] Figure 6 This is a schematic diagram of the structure of the fabric rod welding fixture of the present invention after the heating plate is removed. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 The diagram illustrates a specific embodiment of the fabric bar welding fixture provided by this invention. This fabric bar welding fixture can shape deformed fabric bars to achieve a straightening purpose, thereby improving the welding quality of the fabric bars. To facilitate the description of the structure of this fabric bar welding fixture, the structure of the fabric bar will first be described in detail.

[0035] like Figure 2 As shown, the fabric rod A of the present invention includes a first half-rod A-1 and a second half-rod A-2 to be welded. The first half-rod A-1 and the second half-rod A-2 have similar structures, and each includes a plate A10 to be welded arranged opposite each other. The plate A10 to be welded includes a first surface and a second surface arranged opposite each other. A portion of the first surface is the surface to be welded. Specifically, the first surface of the plate A10 to be welded is provided with an annular protrusion A11. The annular protrusion A11 on the first surface of the first half-rod A-1 and the annular protrusion A11 on the first surface of the second half-rod A-2 are similar in structure. 11. After docking, welding is performed to form the main channel of the fabric bar A. The second surface of the plate A10 to be welded of the first half-bar A-1 is provided with fins A20 arranged perpendicularly to it. The middle area of ​​the fins A20 is provided with a feed pipe A30 communicating with the main channel. The second surface of the plate A10 to be welded of the second half-bar A-2 is provided with fins A20 arranged perpendicularly to it. Several discharge pipes A40 are arranged at intervals along the length direction of the fins A20. The fluid passing through the main channel of the fabric bar A is uniformly discharged through the several discharge pipes A40.

[0036] Based on the structure of the fabric rod A described above, as follows: Figure 1 As shown, the welding fixture for the fabric rod A includes a support member 10 movably supported on a first surface of the plate A10 to be welded, a pressing member 20 movably pressed against a second surface of the plate A10 to be welded, and a heating plate 30 for heating the surface of the plate A10 to be welded. The support member 10 is movable along a first direction (X direction in the figure); the pressing member 20 is movable along both the first and second directions (Y direction in the figure), with the first and second directions being perpendicular to each other; the heating plate 30 is movable between an initial position and a heating position. In the heating position, the heating plate 30 is positioned between the plate A10 to be welded on the first half-rod A-1 and the plate A10 to be welded on the second half-rod A-2.

[0037] The aforementioned welding fixture can straighten deformed fabric rods A to be welded, avoiding the problem of injection-molded products (first half-rod A-1 and second half-rod A-2) being difficult to place into the welding fixture due to warping and deformation, leading to fixture failure and inability to weld the product. This improves welding quality, resulting in uniform fabric distribution and a longer service life for the welded fabric rods A during the fabric distribution process. Simultaneously, the welding fixture has an online straightening function, allowing for direct entry into the welding process after straightening without the need for final shaping, thus increasing production efficiency. Furthermore, the welding fixture adopts a highly compatible split-type fixture design, compatible with different specifications of fabric rods A. For different specifications, especially different lengths, the welding fixture can be shared, reducing production costs.

[0038] Specifically, in one optional embodiment, the welding fixture includes clamping members 40 that are movably clamped on both sides of the fins A20 of the plate body A10 to be welded, and the clamping members 40 can move along a first direction and a second direction.

[0039] More specifically, the clamping member 40 consists of multiple sets of clamping plates spaced apart along the length of the fabric rod A. Each set of clamping plates moves toward each other or toward each other to cooperate with the support member 10 and the pressing member 20 to correct the shape of the fins A20.

[0040] Specifically, in one optional embodiment, the support member 10 and the pressing member 20 are both L-shaped plates, wherein, as shown... Figure 3 , Figure 4 As shown, the support member 10 includes a first support plate 11 extending in a first direction and a second support plate 12 extending in a second direction, and the pressing member 20 includes a third support plate 21 extending in the first direction and a fourth support plate 22 extending in the second direction. The support member 10 and the pressing member 20 form a thin-plate-shaped receiving space for accommodating the plate body A10 to be welded. When correcting the shape of the fabric rod, the width of the receiving space is controlled to match the width of the fabric rod A, that is, the two side walls of the fabric rod A opposite each other in the width direction abut against the second support plate 12 of the support member 10 and the fourth support plate 22 of the pressing member 20, respectively.

[0041] Specifically, such as Figure 3 , Figure 4 As shown, the pressing member 20 is provided with a waist-shaped hole 23 suitable for the fins A20 of the fabric rod A to pass through. When the pressing member 20 moves along the second direction to press the second surface of the first half rod A-1 / second half rod A-2, the fins A20 of the first half rod A-1 / second half rod A-2 pass through the waist-shaped hole 23 of the pressing member 20.

[0042] Specifically, the support member 10, the pressing member 20, the heating plate, and the clamping member 40 move linearly under the action of a linear drive terminal (not shown in the figure). The linear drive terminal can be implemented by an execution terminal that can generate linear displacement, such as a linear motor, hydraulic cylinder, or air cylinder. No specific limitation is made here.

[0043] This invention also provides a specific embodiment of the control method using the above-mentioned fabric rod A welding fixture, the control method comprising the following steps:

[0044] S1. The two support members 10, which are positioned opposite each other at the control interval, move from the initial position to the support position along the first direction, such as... Figure 3 , Figure 4 As shown, the first surfaces of the first half-rod A-1 and the second half-rod A-2 are respectively placed on the surfaces of the two support members 10;

[0045] Specifically, in one optional embodiment, the two support members 10 are moved horizontally to the support position, that is, the two support members 10 are located in a position that extends horizontally and is parallel to each other. The first half-rod A-1 is placed on the upper surface of the upper support member 10, and the second half-rod A-2 is placed on the lower surface of the lower support member 10. The first half-rod A-1 on the upper support member 10 can be placed directly on its upper side, while the second half-rod A-2 can be placed on the lower surface of the lower support member 10 by means of the lower pressing member 20, that is, the second half-rod A-2 is placed on the pressing member 20, and then the pressing member 20 is controlled to approach the support member 10 in the second direction until it abuts against it.

[0046] In other alternative embodiments, the two support members 10 can be moved vertically to the support position, the support members 10 extend vertically and are parallel to each other, and the first half-rod A-1 and the second half-rod A-2 are respectively placed on both sides of the two support members 10 and abut against the support members 10.

[0047] S2. Control the two pressing parts 20 to move from the initial position to the pressing position along the second direction, and press the second surface of the first half rod A-1 and the second half rod A-2 until there is no gap between the first surface of the first half rod A-1 and the first surface of the second half rod A-2 and the support surface of the support member 10.

[0048] Specifically, refer to Figure 3 , Figure 4As shown, the pressing member 20 located on the upper side of the first half-rod A-1 is controlled to move downward, and the pressing member 20 located on the upper side of the second half-rod A-2 is controlled to move upward, so that the side walls of the first half-rod A-1 and the second half-rod A-2 respectively abut against the fourth support plate 22 of the pressing member 20. That is, the pressing member 20 is located in the pressing position. At this time, the pressing member 20 is controlled to apply pressing force to the first half-rod A-1 / second half-rod A-2. When the pressing force reaches the first pressing threshold and the pressing time reaches the first pressing time, the pressing stops.

[0049] Specifically, in one embodiment, the first half-rod A-1 in its initial state is placed on the support member 10, and the second half-rod A-2 is placed on the pressing member 20 on the lower side.

[0050] Control the upper pressing member 20 to move down until it is inserted into the waist-shaped hole 23 of the pressing member 20 and the fin A20 of the first half rod A-1 is inserted into the pressing member 20. The pressing member 20 is in the pressing position. Then control the pressing member 20 to move in the horizontal direction so that the side wall of the first half rod A-1 abuts against the second support plate of the support member 10.

[0051] The pressing member 20 on the lower side is controlled to move upward, causing the second half-rod A-2 to abut against the first support plate 11 of the support member 10. Then, the pressing member 20 is controlled to move horizontally so that one side wall of the second half-rod A-2 abuts against the second support plate 12 of the support member 10, and the other side wall abuts against the fourth support plate 22 of the pressing member 20. Specifically, after the pressing member 20 finishes pressing or while the pressing member 20 is pressing, the clamping member 40 is controlled to move along the first direction until it clamps both sides of the fin A20. The first half-rod A-1 and the second half-rod A-2 are corrected to the prescribed shape under the action of the support member 10, the pressing member 20, and the clamping member 40.

[0052] S3. Control the heating plate 30 to move along the first direction to the heating station, control the two support members 10 to move along the first direction to the initial position, control the pressing member 20 to move along the second direction, so that the welding surface of the first half rod A-1 and the welding surface of the second half rod A-2 come into contact with the heating plate 30, and turn on the heating plate 30 to heat the welding surface of the fabric rod A.

[0053] Specifically, such as Figure 5 As shown, the heating station of the heating plate 30 is located between the first half-rod A-1 and the second half-rod A-2. When the heating plate 30 reaches the heating station, the control support 10 is retracted to the initial position. At this time, the welding surfaces of the first half-rod A-1 and the welding surfaces of the second half-rod A-2 are respectively positioned opposite to the two sides of the heating plate 30.

[0054] Since the first half-rod A-1 and the second half-rod A-2 are supported by the pressing member 20 and the clamping member 40, the two pressing members 20 are controlled to move towards each other, so that the annular welding surface of the first half-rod A-1 and the annular welding surface of the second half-rod A-2 come into contact with the heating plate 30. By controlling the heating time and heating power of the heating plate 30, the annular welding surfaces of the first half-rod A-1 and the second half-rod A-2 reach the welding temperature.

[0055] S4. Control the heating plate 30 to move to the initial position along the first direction, and control the pressing member 20 to move along the second direction so that the welding surface of the first half-rod A-1 contacts and welds with the welding surface of the second half-rod A-2.

[0056] When the surface temperatures of the surfaces to be welded on the first half-rod A-1 and the second half-rod A-2 reach the required levels, the heating plate 30 is removed from the heating station. At this time, if... Figure 6 As shown, continue to control the pressing member 20 to move towards the first half-rod A-1 and the second half-rod A-2 in a direction that approaches each other until the annular surfaces to be welded of the two are in contact, and then the two are welded together by a welding tool.

[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A welding fixture for a fabric rod, the fabric rod comprising a first half-rod and a second half-rod, the first half-rod and the second half-rod respectively comprising a plate to be welded disposed opposite to each other, the plate to be welded comprising a first surface and a second surface disposed opposite to each other, a portion of the first surface being the surface to be welded; characterized in that, The welding fixture includes: A support member is movably supported on the first surface of the plate to be welded, and the support member is movable along a first direction; The pressing member is movably pressed onto the second surface of the plate to be welded. The pressing member can move along a first direction and a second direction, and the first direction and the second direction are perpendicular to each other. A heating plate is used to heat the surface of the plate to be welded. It can move between an initial position and a heating position. When in the heating position, the heating plate moves to a position between the plate to be welded in the first half-rod and the plate to be welded in the second half-rod. The fabric rod has fins perpendicularly arranged on the second surface of the plate to be welded, and the welding fixture further includes: The clamping member is movably clamped on both sides of the fins of the plate to be welded, and the clamping member can move along a first direction and a second direction; the support member and the pressing member are both L-shaped plates, which together form a receiving space for accommodating the plate to be welded; The pressing member is provided with a waist-shaped hole suitable for the fins of the fabric rod to pass through; The clamping element consists of multiple sets of clamping plates spaced apart along the length of the fabric rod, with each set of clamping plates moving toward or away from each other.

2. The fabric rod welding fixture according to claim 1, characterized in that, The support member, the pressing member, the heating plate, and the clamping member move linearly under the action of different linear drive terminals.

3. A control method using the fabric rod welding fixture as described in claim 1 or 2, characterized in that, Includes the following steps: S1. Two support members with opposite control intervals move from the initial position to the support position along the first direction, so that the first surface of the first half-rod and the second half-rod are respectively placed on the surfaces of the two support members; S2. Control the two pressing components to move from the initial position to the pressing position along the second direction, pressing the second surface of the first half-rod and the second half-rod until there is no gap between the first surface of the first half-rod and the first surface of the second half-rod and the supporting surface of the support component; after the pressing component moves to the pressing position, control the pressing component to move along the first direction, so that the side walls of the first half-rod and the second half-rod respectively abut against the fourth support plate of the pressing component; Control the clamping member to move along the first direction until it clamps both sides of the fin; control the two pressing members to move along the second direction until they are respectively inserted and connected to the first half-rod and the second half-rod and are located in the pressing position; control the two pressing members to move along the first direction so that the side walls of the first half-rod and the second half-rod respectively abut against the second support plates of the two support members. S3. Control the heating plate to move along the first direction to the heating station, control the two support members to move along the first direction to the initial position, control the pressing member to move along the second direction, so that the welding surface of the first half rod and the welding surface of the second half rod come into contact with the heating plate, and turn on the heating plate to heat the welding surface of the fabric rod; S4. Control the heating plate to move to the initial position along the first direction, and control the pressing member to move along the second direction so that the welding surface of the first half-rod body contacts and welds with the welding surface of the second half-rod body.

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