Strip material pressing shoe device suitable for full-automatic composite material tape laying equipment and control method

Abstract

The invention discloses a belt material pressing shoe device suitable for full-automatic composite material belt paving equipment. The belt material pressing shoe device comprises a pressing shoe mounting support, and a sliding rail, a pressing shoe supporting frame matched with the sliding rail to do lifting motion and a driving mechanism for driving the pressing shoe supporting frame to ascend and descend are arranged on the pressing shoe mounting support; the shoe pressing supporting frame is sequentially provided with a shoe pressing air bag and a shoe pressing head assembly from top to bottom. The shoe pressing head assembly comprises a plurality of shoe pressing pieces which are transversely stacked, shoe pressing auxiliary supporting plates used for clamping the shoe pressing pieces and a fixing rod connected with the shoe pressing auxiliary supporting plates at the two ends, an avoiding opening is formed in the side face of each shoe pressing piece, and the avoiding openings form a channel for the fixing rod to penetrate through after the shoe pressing pieces are stacked. The invention further provides a control method. The device provided by the invention can effectively solve the strip compaction problem under the curved surface working condition.

Description

Technical Field

[0001] The invention belongs to the field of composite material processing equipment, and in particular relates to a tape pressing shoe device suitable for composite material full-automatic tape laying equipment and a control method. Background Art

[0002] The manufacturing of composite parts is a process of laying prepreg tapes layer by layer, compacting them and then curing them. The laying and compacting of prepreg tapes are the most critical operations in the manufacturing of composite parts. By laying and compacting the prepreg tapes, the gas in the laying process of the prepreg tapes can be effectively discharged, making the layers more tightly bonded, fully ensuring the quality of composite parts.

[0003] During the prepreg tape compaction process, the compaction force generated must be reasonably suitable for the material properties to avoid surface damage.

[0004] The existing tape laying machine's tape material compacting device does not have an obvious compacting effect on curved surface conditions, thereby affecting the tape material laying efficiency and laying accuracy.

[0005] At present, the compaction operation after the completion of the paving by a large number of tape laying machines is done manually, which is labor-intensive and difficult to meet the needs of mass production schedules. In addition, when the operator presses, the compaction operation will be unevenly stressed, thus affecting the laying quality.

[0006] Patent document CN118617773A discloses a special-shaped cutting tape laying head and a tape laying method thereof, wherein the tape laying head comprises: a frame; a reeling mechanism, rotatably connected to the frame and used for reeling a prepreg tape with release paper; a shoe pressing mechanism, arranged at the bottom of the frame, wrapping around the prepreg tape unwound by the reeling mechanism and used for laying the prepreg tape; a reeling mechanism, rotatably connected to the frame and used for reeling in release paper and waste; a cutting mechanism, arranged between the reeling mechanism and the shoe pressing mechanism and used for cutting the prepreg tape; wherein the cutting mechanism comprises a rotatably arranged cutting knife, a first driving member connected to the cutting knife and used for driving the cutting knife to adjust a cutting angle, a feeding driving member driving the first driving member and the cutting knife to move toward or away from the prepreg tape, and a transverse driving member driving the cutting knife to move along the width direction of the prepreg tape.

[0007] Patent document CN218059439U discloses a follower presser foot device and sewing equipment based on a crank slider. The follower presser foot device based on the crank slider includes a crank assembly, a driving mechanism, a linear guide assembly and a press shoe assembly. The crank assembly, the driving mechanism, the linear guide assembly and the press shoe assembly are used to be installed on a sewing machine head. The crank assembly is connected to the driving mechanism. The linear guide assembly includes a linear guide and a guide slider. The guide slider is slidably connected to the linear guide. The guide slider is connected to the crank assembly. The press shoe assembly is connected to the guide slider and moves with the guide slider. The driving mechanism is connected to the crank assembly to drive the crank assembly to move. The crank assembly drives the guide slider and the press shoe assembly to reciprocate. The driving mechanism is used to electrically connect to the control mechanism and can move synchronously with the sewing needle under the control of the control mechanism. Summary of the invention

[0008] The object of the present invention is to provide a tape pressing shoe device and a control method suitable for a composite material fully automatic tape laying equipment, which can effectively solve the tape compaction problem under curved surface working conditions.

[0009] In order to achieve the first object of the present invention, the following technical scheme is provided: a tape pressing shoe device suitable for a fully automatic tape laying device for composite materials, the tape pressing shoe device is located above the tape to be compacted, and mainly comprises a pressing shoe mounting bracket, a sliding track is provided on the pressing shoe mounting bracket, a pressing shoe support frame that cooperates with the sliding track to perform lifting movement, and a driving mechanism that drives the pressing shoe support frame to lift;

[0010] The press shoe support frame is provided with a press shoe air bag and a press shoe head assembly in sequence from top to bottom;

[0011] The pressure shoe head assembly includes a plurality of laterally stacked pressure shoe pieces, a pressure shoe auxiliary support plate for clamping the plurality of pressure shoe pieces, and a fixing rod connecting the pressure shoe auxiliary support plates at both ends. An avoidance opening is provided on the side of each pressure shoe piece, and the avoidance opening forms a channel for the fixing rod to pass through after the plurality of pressure shoe pieces are stacked.

[0012] Specifically, the gap width between the press shoe auxiliary support plates includes 150 mm and 300 mm.

[0013] Specifically, the avoidance opening is a rectangle, and the length direction of the rectangle is consistent with the lifting direction of the pressure shoe support frame.

[0014] Specifically, the length of the rectangle ranges from 6 mm to 10 mm.

[0015] Specifically, the press shoe head assembly is further equipped with a press shoe infrared heating sheet, and the press shoe infrared heating sheet is attached to both sides of the press shoe head formed by stacking a plurality of press shoe sheets.

[0016] Specifically, the driving mechanism is equipped with a pressure sensor for detecting the pressure between the pressure shoe and the belt material.

[0017] Specifically, a buffer rubber is provided between the pressure shoe sheet and the pressure shoe airbag.

[0018] In order to achieve the second object of the present invention, the following technical scheme is provided: a control method for controlling the above-mentioned tape pressing shoe device applicable to the fully automatic tape laying equipment for composite materials, the control method is as follows: the tape pressing shoe device is stopped above the tape, and the pressing shoe support frame is driven downward by the driving mechanism until the pressing shoe piece is attached to the surface of the tape;

[0019] The pressure shoe airbag is controlled to inflate to press the pressure shoe piece tightly so that the pressure shoe piece is squeezed against the surface of the belt material until the pressure value collected by the pressure sensor is equal to the threshold value. At the same time, the pressure shoe infrared heating piece is controlled to heat the pressure shoe piece to complete the belt material compaction work.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The curved workpiece is compacted with materials by using multiple independently moving press shoes in conjunction with flexible air bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the belt press shoe device provided in this embodiment;

[0023] Figure 2 A schematic diagram of the structure of the shoe head assembly provided in this embodiment;

[0024] In the figure, 1. material press shoe device; 11. cylinder assembly; 12. press shoe mounting bracket; 13. press shoe support frame; 14. press shoe auxiliary support plate; 15. press shoe infrared heating plate; 16. press shoe plate; 17. press shoe airbag; 18. press shoe airbag support plate; 19. press shoe adjustment block; 110. fixing rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, a tape press shoe device suitable for a fully automatic tape laying equipment for composite materials is provided in this embodiment. The tape press shoe device 1 is located above the tape to be compacted, and includes a press shoe mounting bracket 12, on which a sliding track is provided, a press shoe support frame 13 that cooperates with the sliding track to perform lifting and lowering movements, and a driving mechanism that drives the press shoe support frame 13 to lift and lower.

[0027] The cylinder assembly is fixedly installed inside the shoe support frame, and the cylinder provides driving force to drive the shoe assembly to form a sliding pair relative to the shoe support frame. The shoe support frame has sliding guide rails fixedly installed on both sides by bolt connection, and the shoe guide rail mounting seat is gap-matched with the shoe guide rail mounting seat to form a sliding pair.

[0028] The press shoe support frame 13 is provided with a press shoe airbag 17 and a press shoe head assembly in sequence from top to bottom;

[0029] like Figure 2 As shown, the pressure shoe head assembly includes a plurality of laterally stacked pressure shoe pieces 16, a pressure shoe auxiliary support plate 14 for clamping the plurality of pressure shoe pieces 16, and a fixing rod 110 connecting the pressure shoe auxiliary support plates 14 at both ends. An avoidance opening is provided on the side of each pressure shoe piece 16, and the avoidance opening forms a channel for the fixing rod 110 to pass through after the plurality of pressure shoe pieces 16 are stacked.

[0030] More specifically, the shoe press auxiliary support plate 14 is fixedly mounted on both sides of the shoe press mounting bracket 12, the shoe press airbag 17 and the shoe press airbag support plate 18 are embedded in the shoe press support frame 13, the bottom of the shoe press airbag 17 is in full contact with the top of the shoe press sheet 16, and the upper structure of the shoe press sheet 16 is stuck in the shoe press support frame 13. The shoe press adjustment block 19 and the sensor are installed in the shoe press sheet 16 to detect the lifting and lowering of the shoe press sheet 16 under compaction work, so as to flexibly control the shoe press work.

[0031] This embodiment also provides a control method for controlling the tape shoe device for composite material fully automatic tape laying equipment described in the above embodiment, and the specific process is as follows:

[0032] The belt material pressing shoe device is stopped above the belt material, and the pressing shoe support frame is driven downward by the driving mechanism until the pressing shoe piece is attached to the surface of the belt material;

[0033] The pressure shoe airbag is controlled to inflate to press the pressure shoe piece tightly so that the pressure shoe piece is squeezed with the surface of the belt material until the pressure value collected by the pressure sensor reaches the threshold value. At the same time, the pressure shoe infrared heating piece is controlled to heat the pressure shoe piece to complete the belt material compaction work.

[0034] More specifically, the shoe-pressing device uses a built-in shoe-pressing airbag, and the air pressure of the cylinder assembly drives several shoe-pressing plates to press down. The shoe-pressing plates can be adapted to 150mm and 300mm wide strips by adjusting the number of installations, and the shoe-pressing plates can be replaced individually. The maximum deformation of the shoe-pressing airbag is ≥6mm, and the shoe-pressing device can adapt to the laying of reinforcement layers with a step difference (slope height) of ≥6mm. The shoe-pressing device is usually activated at the initial end of strip laying, and the subsequent laying is compacted by a roller mechanism. During the compaction process, the shoe-pressing device actually contacts the backing paper of the prepreg strip, and does not directly contact the prepreg. For strips with straight tails (90° cut), the entire process can be compacted and laid by setting up a shoe-pressing device.

[0035] The deformation of the press shoe is ≥6mm. When the flat surface is laid with a belt width of 150mm, the slope is ≥1:5 and the slope height can reach 6mm; when the flat surface is laid with a belt width of 300mm, the slope is ≥1:10 and the slope height can reach 6mm. The maximum pressure of the press shoe of the laying head is ≥1500N, and the pressure can be programmed, adjusted and displayed.

[0036] The air cylinder assembly of the shoe pressing device is cut off to cause the shoe pressing device to shrink, thereby driving the shoe pressing auxiliary support plate, the shoe pressing sheet, and the shoe pressing infrared heating sheet to shrink and separate from the surface of the belt.

[0037] The technical solution provided in this embodiment can realize two working modes: all the press shoe pieces apply pressure as a whole and each press shoe piece applies pressure independently according to the laying surface. The whole press shoe piece is suitable for flat laying conditions, and each press shoe piece applies pressure independently according to the laying surface, which is suitable for curved surface laying conditions. It can make it fit the surface of the strip more closely and the contact area for pressing the strip is larger, so that the efficiency and precision of laying are higher.

[0038] In addition, the terms "upper", "lower", "inner", "outer", "front", "rear" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Unless otherwise specifically stated, the relative steps, numerical expressions and values ​​of the components and steps described in these embodiments do not limit the scope of the present invention.

[0039] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

[0040] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tape pressing shoe device suitable for a composite material fully automatic tape laying equipment, the tape pressing shoe device is located above the tape to be compacted, characterized in that: It comprises a press shoe mounting bracket, the press shoe mounting bracket is provided with a sliding track, a press shoe support frame which cooperates with the sliding track to perform lifting movement, and a driving mechanism for driving the press shoe support frame to lift; The press shoe support frame is provided with a press shoe air bag and a press shoe head assembly in sequence from top to bottom; The pressure shoe head assembly includes a plurality of laterally stacked pressure shoe pieces, a pressure shoe auxiliary support plate for clamping the plurality of pressure shoe pieces, and a fixing rod connecting the pressure shoe auxiliary support plates at both ends. An avoidance opening is provided on the side of each pressure shoe piece, and the avoidance opening forms a channel for the fixing rod to pass through after the plurality of pressure shoe pieces are stacked.

2. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 1 is characterized in that: The gap widths between the press shoe auxiliary support plates include 150 mm and 300 mm.

3. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 1 is characterized in that: The avoidance opening is rectangular, and the length direction of the rectangle is consistent with the lifting direction of the pressure shoe support frame.

4. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 3 is characterized in that: The length of the rectangle ranges from 6 mm to 10 mm.

5. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 1 is characterized in that: The press shoe head assembly is also equipped with a press shoe infrared heating sheet, and the press shoe infrared heating sheet is attached to both sides of the press shoe head formed by stacking a plurality of press shoe sheets.

6. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 1 is characterized in that: The driving mechanism is equipped with a pressure sensor for detecting the pressure between the pressure shoe and the belt material.

7. The tape pressing shoe device suitable for composite material fully automatic tape laying equipment according to claim 1 is characterized in that: A buffer rubber is arranged between the pressure shoe sheet and the pressure shoe airbag.

8. A control method, characterized in that: Used to control the tape shoe device suitable for composite material fully automatic tape laying equipment as described in any one of claims 1 to 7, the control method is as follows: The belt material pressing shoe device is stopped above the belt material, and the pressing shoe support frame is driven downward by the driving mechanism until the pressing shoe piece is attached to the surface of the belt material; The pressure shoe airbag is controlled to inflate to press the pressure shoe piece tightly so that the pressure shoe piece is squeezed with the surface of the belt material until the pressure value collected by the pressure sensor reaches the threshold value. At the same time, the pressure shoe infrared heating piece is controlled to heat the pressure shoe piece to complete the belt material compaction work.

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