Plate lock catch forming method

Abstract

The invention discloses a plate lock catch forming machining method which comprises the following steps: step 1, pre-cutting machining: pre-cutting the surfaces of the two sides of a cut plate to form machining notches, forming corners between the machining notches and the surface of the plate, and reserving machining allowance; 2, local linear heat treatment processing is conducted, specifically, linear heating is conducted on the corners of the two sides of the plate in the conveying direction of the plate in a linear condensation heating mode till the corners are in a plastic state; 3, corner extrusion forming machining is conducted, specifically, the two sides of the heated and softened plate pass through a forming channel at the same time, the softened corners are subjected to extrusion forming, and round corners are formed; and 4, lock catch machining is conducted, specifically, rough machining and finish machining of the tenon and the mortise are conducted in sequence based on the machined notches, and forming of the plate lock catch is completed. According to the invention, the corner process of the lock catch is improved, so that not only is the precision requirement on plate sawing reduced and is the benefit for improving the stability of the plate corner quality improved, but also each structural layer in the plate can be prevented from being exposed, and the subsequent chamfering and painting operation is omitted.

Description

Technical Field

[0001] The invention relates to the field of plate processing, and in particular to a method for forming and processing a plate lock buckle. Background Art

[0002] As consumers attach great importance to the concept of healthy home, the requirements for flooring and other decoration materials are getting higher and higher, prompting the flooring industry to continue to innovate. Among them, the lock-in floor is gradually favored by the market due to its advantages such as easy installation, good stability, beautiful appearance and durability. Especially in the floor heating environment, the lock-in floor has become the first choice of consumers.

[0003] In actual applications, interlocking floors are installed by interlocking with each other. Therefore, the interlocking locks are very likely to cause friction and wear during the long-term interlocking process, especially at the corners of the interlocking locks. Conventional corners are mostly right angles. On the one hand, right-angled corners may not provide sufficient contact area and locking force, resulting in insufficient tightness at the joints of the floor. This will affect the overall stability and aesthetics of the floor, and the gaps may increase after long-term use. On the other hand, when right-angled corners are subjected to external forces, such as stepping on, furniture movement, etc., stress concentration is more likely to occur, resulting in wear or damage to the corners. This not only affects the service life of the floor, but may also affect the flatness and installation effect of the floor. Therefore, in order to solve the above problems, the corners need to be designed into a rounded chamfered structure. There are mainly two types of conventional chamfering treatments: (1) One method is to directly use a milling cutter to cut and chamfer the locking edges of the small board. However, this cutting method will damage the surface of the board, such as Figure 1 As shown, the internal structural layers of the board are exposed to the outside, and a chamfering and painting process needs to be added in the subsequent processing. This not only increases the processing steps, but also the subsequent chamfering and painting process will also affect the quality of the floor due to problems such as uneven painting of the surface film layer.

[0004] (2) Another method is to heat press the edges of the large board before cutting it into small boards, so as to form rounded edges and corners. The large board is then sawed into multiple small boards along the edges and corners after heat pressing, and then the small boards are locked. However, this processing procedure requires high cutting accuracy when sawing the large board into multiple small boards, and precise positioning is required in each process. Otherwise, it is easy to destroy the roundness of the edges and corners and the processing offset, affecting the locking quality and splicing stability of the board. Summary of the invention

[0005] In order to solve the technical defects existing in the prior art, the present invention proposes a method for forming and processing a plate lock buckle, which improves the edge and corner process of the lock buckle, which not only reduces the precision requirements for plate sawing, but also helps to improve the stability of the quality of the edge and corner of the plate, and can avoid exposing the internal structural layers of the plate, thereby omitting the subsequent chamfering and painting operations.

[0006] The main technical solutions adopted in the present invention are: A method for forming a plate lock buckle, comprising the following steps: Step 1: Pre-cutting: Pre-cut the surfaces of both sides of the cut plate to form processing notches, and the processing notches and the plate surface form corners, leaving processing allowances; Step 2: Local linear heat treatment: Linearly heat the edges and corners of the plate along the plate transmission direction until they are plastic; Step 3: Corner extrusion forming: Both sides of the heated and softened sheet material pass through the forming channel at the same time, and the softened corners are extruded to form rounded corners; Step 4: Lock processing: Based on the processing groove, the tenon and the mortise are rough-processed and fine-processed in sequence to complete the forming of the plate lock.

[0007] Preferably, in the step 1, machining notches are formed by cutting downward from the top layer of the two side surfaces of the plate, wherein machining allowances are retained on the machining side surfaces of the machining notches.

[0008] Preferably, in step 1, the processed notch includes a processed side surface and a processed bottom surface, and an angle is formed between the processed side surface and the processed bottom surface, and the angle range is ≤90°.

[0009] Preferably, in step 2, linear focusing is performed only on the corners for local heating.

[0010] Preferably, in step three, the forming channel is formed by the contact surface of the upper pressing wheel and the contact surface of the lower pressing wheel, wherein the contact surface of the lower pressing wheel is designed according to the arc surface of the target corner along the axial direction and is extruded and formed in cooperation with the corner after local heating. Preferably, in step three, after extrusion deformation, each structural layer of the plate at the corner is extruded and deformed as a whole to form a curved corner, and each structural layer of the plate is covered in sequence from top to bottom.

[0011] Preferably, a cooling process is provided between step three and step four to cool the edges and corners after extrusion forming to a fixed state.

[0012] Preferably, during the processing of step one, step two and step three, the plate is propagated in a straight line along the same reference line, and the length direction of the edge corners of the plate is consistent with the transmission direction of the plate.

[0013] Preferably, during the processing of step 1, step 2 and step 3, the plate is transported with the top surface facing downward.

[0014] Beneficial effects: The present invention provides a method for forming a plate lock, which has the following advantages: (1) The present invention adjusts the processing steps of the plate corners, thereby eliminating the need for hot pressing before cutting, and thus eliminating the need to align the corner lines after hot pressing during cutting, thereby reducing the requirements for the sawing accuracy of the plate, and reducing the processing cost and defective rate.

[0015] (2) The present invention performs pre-cutting processing on the plate after cutting, and performs local linear heating on the edges and corners formed by the pre-cutting, and uses a pressure wheel with an arc-shaped contact surface to shape the edges and corners of the heated plate, thereby forming rounded edges and corners. The entire edge and corner processing process avoids the overall heating treatment of the plate, and only local heating is required to achieve the edge and corner processing, thereby preventing the plate from being deformed due to overall heating, and greatly improving the stability of the quality of the edge and corner of the plate.

[0016] (3) In the present invention, the rounded chamfer formed by extrusion will not damage the surface structure of the plate, and the internal structure layer of the plate at the corner will not be exposed, which can reduce the subsequent chamfering and painting operations, which not only simplifies the plate processing process, but also greatly reduces the production cost of the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the local structure of an existing milling cutter for cutting chamfers; Figure 2 It is a schematic diagram of a local chamfer of the present invention (one side); Figure 3 It is a schematic diagram of the processing notch of the present invention; Figure 4 It is a schematic diagram of the cooperation between the upper pressing wheel and the lower pressing wheel of the present invention; Figure 5 It is a schematic diagram of the partial structure of the extrusion forming of one side of the plate of the present invention; In the figure: processing notch 1, processing side surface 1-1, processing bottom surface 1-2, plate 2, corner 3, forming channel 4, upper pressing wheel 4-1, lower pressing wheel 4-2. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The following description of the specific implementation is merely exemplary, and it should be understood that the specific implementation described herein is only used to explain the present invention, and is by no means a limitation of the present invention and its application or usage.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. On the contrary, when an element is referred to as being "directly" connected to another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example 1

[0021] A certain specification of board includes: wear-resistant layer 0.3mm, decorative layer 0.05mm and base material layer (WPC base material) from top to bottom. Taking the above board as an example, the buckle shape of the lock board is processed. The specific method is as follows: S1 Pre-cutting Processing: First, saw the large board into multiple target small boards, and then pre-cut the surfaces of both sides of the cut board to form processing notches 1. The processing notches 1 and the surface of the board 2 (i.e., the wear-resistant layer) form corners 3, and retain the processing allowance, such as Figure 3 As shown. In this embodiment 1, a certain depth (about 1-2 mm) is cut downward from the top layer (i.e., the wear-resistant layer) on both sides of the plate to form a processing notch 1. The processing notch 1 includes a processing side surface 1-1 and a processing bottom surface 1-2, and an angle θ is formed between the processing side surface 1-1 and the processing bottom surface 1-2, and the angle θ ranges from ≤90°. When θ is less than 90°, a compression margin can be provided for the subsequent extrusion forming of the corners.

[0022] In this embodiment 1, the processing side surface 1-1 of the processing notch 1 retains an appropriate processing allowance. The processing allowance of the processing bottom surface of the processing notch 1 is determined according to the shape of the actual target lock (the size of the tenon or the tenon groove), which belongs to conventional technology and is not described in detail.

[0023] S2 local linear heat treatment: linear spotlight heating is used to heat and soften the corners on both sides of the plate along the plate transmission direction to a plastic state. In this embodiment 1, the linear direction of the linear spotlight heating is consistent with the plate transmission direction, and is focused on the corner 3 of the plate 2. Only the corner linear spotlight is locally heated, and the heating softening temperature is 80-150°C. In the present invention, linear spotlight heating can be achieved by, but is not limited to, infrared spotlight heaters, and the heating softening temperature can be controlled by adjusting the power of the infrared spotlight heater and the plate transmission speed.

[0024] S3 corner extrusion forming process: After being heated and softened, both sides of the sheet 2 pass through the forming channel 4 at the same time, and the softened corners 3 are extruded to form rounded corners. After being extruded and deformed, the structural layers of the sheet at the corners (including the wear-resistant layer, the decorative layer and the base material layer) are deformed as a whole to form curved corners, and the structural layers of the sheet are covered in sequence from top to bottom, which will not damage the surface structure and does not require subsequent chamfering and painting operations.

[0025] In this embodiment 1, Figure 4-5 As shown, the forming channel 4 is formed by the contact surface of the upper pressing wheel 4-1 and the contact surface of the lower pressing wheel 4-2, wherein the contact surface of the lower pressing wheel 4-2 is designed according to the arc surface of the target corner along the axial direction, and is extruded and formed in cooperation with the corner after local heating. The contact surface of the upper pressing wheel 4-1 is mainly used to provide a clamping force. On the one hand, it cooperates with the lower pressing wheel 4-2 for extrusion forming, and on the other hand, it compresses and positions the sheet material during transmission to prevent the sheet material from shifting during the extrusion process.

[0026] In the present invention, the upper pressing wheel 4-1 and the lower pressing wheel 4-2 are both follower wheels, and the upper pressing wheel 4-1 and the lower pressing wheel 4-2 are driven to rotate by the plate being transmitted.

[0027] S4 Cooling process: Cool the extruded corners to a fixed state. The specific cooling temperature can be set according to actual needs. All existing sheet cooling devices are applicable, and the sheet or corners can be cooled as a whole or partially, and can be selectively designed by technicians in this field according to actual needs. This is because, although the corners after local heating are extruded, if a high temperature is still maintained, deformation will still occur in the subsequent processing process. Therefore, the corners after extrusion can be cooled so that the shape of the corners can be fixed.

[0028] S5 Lock processing: Based on the processing notch, the tenon and the tenon groove are processed in sequence for rough processing and fine processing to complete the forming of the plate lock. The two sides of the plate are used for processing the tenon and the tenon groove respectively. The specific processing method is the same as the existing technology, so it is not described in detail.

[0029] In the present invention, during the processing of steps S1, S2, and S3, the plate 2 maintains a straight line propagation along the same reference line, and the length direction of the plate corner 3 is consistent with the transmission direction of the plate, and during the transmission process, the top surface (wear-resistant layer) of the plate is always placed downward for transmission.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for forming a plate lock, characterized in that: The following steps are involved: Step 1: Pre-cutting: Pre-cut the surfaces of both sides of the cut plate to form processing notches, and the processing notches and the plate surface form corners, leaving processing allowances; Step 2: Local linear heat treatment: Linearly heat the edges and corners of the plate along the plate transmission direction until they are plastic; Step 3: Corner extrusion forming: Both sides of the heated and softened sheet material pass through the forming channel at the same time, and the softened corners are extruded to form rounded corners; Step 4: Lock processing: Based on the processing groove, the tenon and the mortise are rough-processed and fine-processed in sequence to complete the forming of the plate lock.

2. The method for forming a plate lock according to claim 1, characterized in that: In the step 1, machining notches are formed by cutting downward from the top layer of the two side surfaces of the plate, wherein machining allowances are reserved on the machining side surfaces of the machining notches.

3. The method for forming a plate lock according to claim 1 or 2, characterized in that: In the step 1, the processed notch includes a processed side surface and a processed bottom surface, and an angle is formed between the processed side surface and the processed bottom surface, and the angle range is ≤90°.

4. The method for forming a plate lock according to claim 1, characterized in that: In the step 2, only the corners are locally heated by linear focusing.

5. The method for forming a plate lock according to claim 1, characterized in that: In the step three, the forming channel is formed by the contact surface of the upper pressing wheel and the contact surface of the lower pressing wheel, wherein the contact surface of the lower pressing wheel is designed according to the arc surface of the target corner along the axial direction and is extruded in cooperation with the corner after local heating.

6. The method for forming a plate lock according to claim 1, characterized in that: In the step three, after extrusion deformation, the structural layers of the plate at the corners are extruded and deformed as a whole to form curved corners, and the structural layers of the plate are covered in sequence from top to bottom.

7. The method for forming a plate lock according to claim 1, characterized in that: A cooling process is also provided between step three and step four to cool the edges and corners after extrusion forming to a fixed state.

8. The method for forming a plate lock according to claim 1, characterized in that: During the processing of step 1, step 2 and step 3, the plate is propagated in a straight line along the same reference line, and the length direction of the edge corner of the plate is consistent with the transmission direction of the plate.

9. The method for forming a plate lock according to claim 1, characterized in that: During the processing of step 1, step 2 and step 3, the plate is transported with the top surface facing downward.

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