Positioning mechanism of a woodworking processing center

Abstract

The present invention provides a positioning mechanism for a woodworking machining center, which belongs to the technical field of mechanical equipment. It solves the problem of poor stability in positioning workpieces with uneven upper surfaces in existing woodworking machining centers. The positioning mechanism of the woodworking machining center includes a frame and a machining platform. The positioning mechanism includes a lifting frame, and the lifting frame is located above the machining platform. The lifting frames are connected to pressure rollers through elastic connectors. Under the elastic support of the connectors, the pressure rollers on each lifting frame are respectively located on the side of each lifting frame and have a gap with each lifting frame, and the lower part of the pressure roller is lower than the lower part of the lifting frame. The positioning mechanism of the woodworking machining center can ensure the stability of the pressing positioning.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment and relates to a positioning mechanism of a woodworking processing center. Background Art

[0002] Woodworking machining centers integrate a variety of wood processing methods, such as engraving. From a machining principle perspective, this is a combination of drilling and milling. Its applications are wide-ranging, including woodworking engraving machines, laser engraving machines, advertising engraving machines, jade engraving machines, stone engraving machines, and cylindrical engraving machines. Engraving machines have a wide range of applications, even replacing manual engraving techniques and laying the foundation for high-volume and rapid production of products. Woodworking machining centers are equipped with a machining platform and machining components. The machining platform is used to place the workpiece. The machining components exert force on the workpiece during machining, so a positioning mechanism is required to position the workpiece.

[0003] For example, the positioning mechanism of a woodworking machining center disclosed in the patent document (application number: 202010223861.1) has a processing platform slidingly arranged on the frame in the horizontal direction, and the positioning structure includes several mounting seats arranged on the frame, each of which is horizontally provided with a positioning roller, and the several mounting seats are arranged in two rows, and the mounting seats are each connected to a lifting seat sliding in the vertical direction, one end of the positioning roller is connected to the lifting seat, and the other end of the two rows of positioning rollers faces the inside of the frame. When the lifting seat rises, the other end of the two rows of positioning rollers can be located above the processing platform. Each mounting seat is provided with a driving member, and this structure drives the positioning roller to descend and press it tightly on the upper surface of the workpiece through the driving member. However, when the upper surface of the workpiece is uneven, such as there is a slope with a large slope, and the positioning roller just presses against the slope, the positioning roller has a large pressure under the action of the driving member, and when pressed down on the slope, it will generate a horizontal thrust on the workpiece, which can easily cause the workpiece to move horizontally and affect the positioning stability.

[0004] In response to the above problems, the patent document (application number: 201620339849.6) discloses a formaldehyde-free wooden board punching device, including a gantry and a workbench, a pressure plate is provided under the gantry, and upper guide rods are provided on both sides of the gantry in the vertical direction. A clamping device is provided on the pressure plate, and the clamping device includes a fixed plate, a pressure rod, an upper positioning block, a lower positioning block and a spring. When the clamping device descends, the pressure rod can be pressed on the workpiece under the action of the spring. The spring can play a buffering role to avoid excessive horizontal force on the workpiece and cause the workpiece to shift. However, since the pressure rod can only move up and down, even after being buffered by the spring, the pressure rod is still pressed against the inclined surface, and a horizontal thrust is always generated on the workpiece. There is still an unstable factor. At the same time, if the workpiece needs to move during the processing to cooperate with the processing of the processing component, then when the workpiece moves, the inclined surface will push the pressure rod and cause the pressure rod to move relative to the workpiece. Not only will the position where the pressure rod is pressed change, but it will also generate a greater thrust on the workpiece, resulting in unstable positioning of the workpiece. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a positioning mechanism for a woodworking machining center to solve the problem of poor stability in positioning workpieces with uneven upper surfaces in the existing woodworking machining center.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A positioning mechanism for a woodworking processing center, the woodworking processing center includes a frame and a processing platform arranged on the frame, the positioning mechanism includes a lifting frame arranged on the frame and capable of being raised and lowered, and the lifting frame is located above the processing platform, and is characterized in that the lifting frames are connected to pressure rollers through elastic connecting parts, and under the elastic support of the connecting parts, the pressure rollers on each lifting frame are respectively located on the side of their respective lifting frames and there is a gap between them and their respective lifting frames, and the lower part of the pressure roller is lower than the lower part of the lifting frame.

[0007] The workpiece is placed on the processing platform, and the processing platform moves with the workpiece to cooperate with the continuous processing of the workpiece by the tool and the selection of processing at different positions of the workpiece. The tool will generate a large and variable direction force on the workpiece during the processing of the workpiece. For this reason, the present application lowers the lifting frame to press the pressure roller on the workpiece. Compared with the existing method of clamping the workpiece on both sides, the pressure roller presses the workpiece on the processing platform from top to bottom, which obviously has a greater pressing force and the stability of the workpiece positioning will be higher. Compared with the existing pressure roller that can only move up and down, when the upper surface of the workpiece is uneven and there is an inclined surface, the pressure roller descends and presses on the inclined surface to generate a horizontal thrust on the workpiece, causing the workpiece to move horizontally, the pressure roller of the present application is connected to the lifting frame by an elastic connecting member, and the pressure roller is not connected to the lifting frame by other connecting components with a guiding function. The pressure roller can be moved under the action of external force. The connecting part is deformed, and based on the elastic support of the connecting part, the pressure roller is located on the side of the lifting frame and has a gap with the lifting frame. Therefore, the circumference of the pressure roller has space for movement up and down, front and back, so that when the connecting part is deformed, the pressure roller can move up and down and horizontally for a certain distance, and the lifting frame drops during positioning. At this time, if the position of the upper surface of the workpiece relative to the pressure roller is an inclined surface, since the pressure roller is movable, the pressure roller can move along the inclined surface and find a suitable and easy-to-abut position, thereby avoiding the workpiece from being subjected to a large horizontal thrust due to the action on the inclined surface, and the abutment and pressing are more stable, thereby ensuring the stability of the workpiece. At the same time, during the pressure roller pressing and positioning process, the processing platform can move appropriately to cooperate with the processing of the processing component, and during the movement of the processing platform, the pressure roller can move with the workpiece through the deformation of the connecting part, thereby avoiding changes in the position where the pressure roller is pressed, thereby ensuring the stability of the pressing and positioning.

[0008] In the positioning mechanism of the aforementioned woodworking machining center, the lifting frame is rod-shaped and horizontally arranged. Connected to the lifting frame via connectors are a plurality of pressure rollers arranged in a sequentially arranged transverse direction. Several workstations are arranged transversely on the machining platform. The heights of the workpieces vary. Unlike existing systems that simultaneously compress several workpieces using a single pressure roller, resulting in different pressure forces on different workpieces and less pressure on lower height workpieces, leading to poor positioning stability, the lifting frame is connected to a plurality of pressure rollers, each corresponding to a workstation. This allows the workpieces at the various workstations to be pressed and positioned by their respective pressure rollers, thereby ensuring the stability of the positioning of each workpiece.

[0009] In the positioning mechanism of the woodworking machining center, each of the pressure rollers is connected to the lifting frame via two connectors, with the two connectors being connected to each end of the pressure roller. The connectors connecting both ends of the pressure roller ensure stability and provide a uniform pressing force on the workpiece.

[0010] In the positioning mechanism of the aforementioned woodworking machining center, the connecting member comprises an elastic spring steel wire. One end of the spring steel wire is wound and fixed to the lifting frame, while the other end is bent downward along the winding direction and wound and fixed to the end of the pressure roller. The spring steel wire provides support for the pressure roller and also has a certain degree of elasticity. Its two ends are respectively connected to the lifting frame and the pressure roller by a winding method, which makes installation easy and highly stable.

[0011] In the positioning mechanism of the aforementioned woodworking machining center, a retaining ring is mounted on the lifting frame, to which one end of the spring wire is secured. The retaining ring is then secured to the lifting frame via a plurality of radially threaded bolts. Loosening the bolts allows the retaining ring to be adjusted along the length of the tool holder, thereby adjusting the position of the pressure roller. Simultaneously, the retaining ring and the spring wire can be rotated to adjust the angle of the spring wire, thereby adjusting its posture and thereby adjusting the pressing force of the pressure roller.

[0012] In the positioning mechanism of the aforementioned woodworking machining center, the pressure roller includes a rotating shaft with connecting sleeves rotatably mounted on both ends of the shaft. The other ends of the two spring wires are respectively wound and fixed on the connecting sleeves. The rotating shaft is covered with a buffer sleeve. The buffer sleeve prevents damage to the workpiece. The rotating shaft is connected to the connecting member via the connecting sleeve, which allows the rotating shaft to rotate. Therefore, when the machining platform moves the workpiece a long distance, the pressure roller can roll directly along the upper surface of the workpiece, reducing the horizontal thrust on the workpiece.

[0013] In the positioning mechanism of the aforementioned woodworking machining center, the spring steel wire comprises a fixed section and a connecting section, both of which are spirally shaped, and an elastic section located between the fixed and connecting sections. The fixed section is sleeved on the lifting frame, and the connecting section is sleeved on the end of the pressure roller. The end of the elastic section connected to the fixed section is located above the lifting frame and arches upward in an arc shape, leaving a gap between the elastic section and the upper portion of the lifting frame. The end of the elastic section connected to the connecting section extends to the side of the lifting frame. A gap is created between the section of the elastic section located above the lifting frame and the lifting frame, providing space for vertical deformation. A gap is created between the section of the elastic section located on the side of the lifting frame and the side of the lifting frame, providing space for horizontal deformation, thereby enabling the pressure roller to move a certain distance in the vertical and horizontal directions.

[0014] In the positioning mechanism of the aforementioned woodworking machining center, the processing platform is mounted on a frame that slides longitudinally. A plurality of lifting frames are arranged longitudinally, and the frame is provided with a plurality of drive members capable of independently driving the lifting frames. Each of the plurality of lifting frames is pressed against the workpiece via respective pressure rollers, and each lifting frame can be raised or lowered, thereby adjusting the height of the workpiece's upper surface to ensure stable workpiece positioning.

[0015] In the positioning mechanism of the aforementioned woodworking machining center, the frame is vertically slidably connected to a plurality of lifting blocks on either side of the machining platform. The lifting blocks on the same side are arranged longitudinally in sequence. The ends of the lifting frame are fixed to the lifting blocks on either side. The driving member comprises a cylinder located below the lifting blocks, with the piston rod of the cylinder facing upward and fixed to the lifting blocks. The cylinders drive the lifting frame upward and downward, ensuring its stability and accurately controlling the pressing force on the workpiece.

[0016] In the positioning mechanism of the woodworking machining center described above, the frame is fixed with several mounting blocks on both sides of the processing platform. These mounting blocks are arranged in sequence along the longitudinal direction, and slide rails are fixed vertically to each mounting block. The lifting block is fixed with a slider, and the sliders of the several lifting blocks are slidably connected to the slide rails of the several mounting blocks. The cylinder is fixed to the side of the mounting block. The sliders cooperate with the slide rails to ensure the stability of the lifting frame.

[0017] Compared with the existing technology, the positioning mechanism of the woodworking processing center has the following advantages:

[0018] 1. Since the pressure roller is connected to the lifting frame through a long connecting piece, the connecting piece is elastic, so that the pressure roller can move up and down and horizontally for a certain distance. If the position of the upper surface of the workpiece relative to the pressure roller is an inclined surface, since the pressure roller is movable, the pressure roller can move along the inclined surface and find a suitable and easy-to-abut position, avoiding the workpiece from being subjected to a large horizontal thrust due to the action on the inclined surface. The abutment and pressing are also more stable, ensuring the stability of the workpiece.

[0019] 2. During the pressing and positioning process of the pressure roller, the processing platform can move appropriately to cooperate with the processing of the processing components. During the movement of the processing platform, the pressure roller can move with the workpiece through the deformation of the connecting parts, thereby avoiding changes in the position where the pressure roller is pressed, thereby ensuring the stability of the pressing and positioning.

[0020] 3. Since the pressure roller can rotate, when the processing platform moves the workpiece for a long distance, the pressure roller can roll directly along the upper surface of the workpiece, avoiding large horizontal thrust on the workpiece due to sliding friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of a woodworking processing center.

[0022] Figure 2 It is a top view of the structure of the woodworking processing center.

[0023] Figure 3 yes Figure 2 Structural cross-section view at AA in the middle.

[0024] Figure 4It is a structural cross-sectional view of the pressure roller.

[0025] Figure 5 yes Figure 1 A magnified view of the structure at point B.

[0026] Figure 6 yes Figure 2 Enlarged view of the structure at point C in the middle.

[0027] Figure 7 yes Figure 3 Enlarged view of the structure at point D in the middle.

[0028] Figure 8 yes Figure 1 Enlarged view of the structure at E in the middle.

[0029] In the figure, 1. frame; 11. column; 12. crossbeam; 13. horizontal slide; 14. vertical slide; 15. support; 16. guide rail; 2. processing platform; 3. tool holder; 31. processing assembly; 4. lifting frame; 5. pressure roller; 51. rotating shaft; 52. buffer sleeve; 53. connecting sleeve; 54. bearing; 6. spring steel wire; 61. fixed section; 62. elastic section; 63. connecting section; 7. fixing ring; 71. bolt; 8. mounting seat; 81. guide block; 82. slide rail; 83. cylinder; 9. lifting seat; 91. slider. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0031] Example 1:

[0032] like Figure 1 、 Figure 2 、 Figure 3As shown, a positioning mechanism of a woodworking processing center, the woodworking processing center includes a frame 1, a tool holder 3 and a processing platform 2. The frame 1 has two vertically arranged columns 11, and a horizontally arranged crossbeam 12 is fixed between the tops of the two columns 11. Two cross-slide plates 13 are connected to the crossbeam 12 in a horizontal sliding manner. Vertical slide plates 14 are connected to the two cross-slide plates 13 in a vertical sliding manner. Supports 15 are fixed to the sides of the two vertical slide plates 14. The tool holder 3 is long, and the two ends of the tool holder 3 are respectively rotatably connected to the two supports 15, so that the tool holder 3 is arranged in a horizontal direction. Several processing components 31 are provided in the length direction. The processing components 31 include a processing motor fixed on the tool holder 3 and a tool installed at the output end of the processing motor. Several processing components 31 are evenly distributed in the horizontal direction. The processing platform 2 is connected to the frame 1 in a longitudinal sliding manner, and the processing platform 2 is located between the two columns 11. The tool holder 3 is located above the processing platform 2, that is, the processing platform 2 can move longitudinally under the tool holder 3. The horizontal slide 13, the vertical slide 14 and the processing platform 2 are all driven by their respective drive motors and screw nut assemblies, and the tool holder 3 is driven to rotate by the rotary motor and the reducer.

[0033] The positioning mechanism includes a plurality of lifting frames 4 connected to the frame 1 and capable of lifting and lowering. The lifting frames 4 are all in the shape of long bars and are arranged horizontally in the transverse direction. The plurality of lifting frames 4 are arranged in sequence in the longitudinal direction. The lifting frames 4 are all located above the processing platform 2, that is, the processing platform 2 can move longitudinally below the plurality of lifting frames 4. A plurality of pressure rollers 5 are connected to the lifting frames 4 through elastic connectors. The pressure rollers 5 are arranged in the transverse direction. The pressure rollers 5 of each lifting frame 4 are all located on the same side of the lifting frame 4 and are arranged in sequence in the transverse direction. The pressure rollers 5 are arranged parallel to the lifting frames 4. Specifically, in combination with Figure 4 As shown, the pressure roller 5 includes a rotating shaft 51 and a buffer sleeve 52 sleeved on the rotating shaft 51. Both ends of the rotating shaft 51 are sleeved with connecting sleeves 53. A bearing 54 is provided between the connecting sleeve 53 and the rotating shaft 51. The connecting sleeve 53 and the rotating shaft 51 can rotate relative to each other. The connecting sleeves 53 at both ends are connected to the lifting frame 4 through connecting pieces. Figure 5 、 Figure 6 、 Figure 7As shown, the connecting piece includes a spring steel wire 6 and a fixing ring 7. The fixing ring 7 is sleeved on the lifting frame 4 and is locked and fixed to the lifting frame 4 by a number of bolts 71 penetrated in the radial direction. The spring steel wire 6 includes a fixed section 61, an elastic section 62 and a connecting section 63. The fixed section 61 and the connecting section 63 are both spiral. The elastic section 62 is located between the fixed section 61 and the connecting section 63. The fixed section 61 is spirally sleeved on the lifting frame 4 and fixed to the fixing ring 7. The connecting section 63 is spirally sleeved on the connecting sleeve 53 and fixed. One end of the elastic section 62 smoothly transitions with the fixed section 61 along the spiral direction of the fixed section 61, and the other end of the elastic section 62 is spirally sleeved on the connecting sleeve 53 and fixed. One end smoothly transitions to the connecting section 63 along the spiral direction of the connecting section 63. The end of the elastic section 62 connected to the fixed section 61 is located above the lifting frame 4 and arches upward in an arc shape, so that there is a gap between the elastic section 62 and the upper part of the lifting frame 4. The end of the elastic section 62 connected to the connecting section 63 is bent downward and extended to the side of the lifting frame 4, so that there is a gap between the elastic section 62 and the side of the lifting frame 4. At this time, there is a gap between the pressure roller 5 and the side of the lifting frame 4, and the lower part of the pressure roller 5 is lower than the lower part of the lifting frame 4. Of course, in the actual design process, when the rigidity of the elastic section 62 is large, its other end can also be in a downward tilted state.

[0034] Combine Figure 8 As shown, the frame 1 is fixed with a row of mounting blocks 8 on both sides of the processing platform 2. The mounting blocks 8 in the same row are arranged in sequence along the longitudinal direction, and the mounting blocks 8 in the two rows are arranged one by one. Specifically, guide rails 16 are fixed to both sides of the processing platform 2 along the longitudinal direction. Guide blocks 81 are fixed to the bottom of the mounting blocks 8. The guide blocks 81 on the mounting blocks 8 in the same row are all slidably connected to the guide rails 16 and fixed by screws. The mounting blocks 8 are all columnar and vertically arranged. The upper ends of the mounting blocks 8 are all higher than the processing platform 2. Slide rails 82 are vertically fixed to the sides of the mounting blocks 8. Slide blocks 91 are slidably connected to the slide rails 82. Lifting blocks 91 are fixed to the sliders 91. The two ends of the lifting frame 4 are respectively fixed to the corresponding two lifting blocks 9. Vertically arranged cylinders 83 are fixed to the sides of the mounting blocks 8. The piston rods of the cylinders 83 face upward and are fixed to the lifting blocks 9.

[0035] Example 2:

[0036] The structure of this woodworking processing center is basically the same as that of Example 1, except that the processing platform 2 is fixed on the frame 1, and the frame 1 and the column 11 are split. The lower ends of the two columns 11 are both slidably arranged on the frame 1 along the longitudinal direction. The columns 11 and the crossbeam 12 drive the tool holder 3 to move longitudinally for processing and position adjustment. A bracket is connected between the two columns 11, and the mounting seat 8 is fixed on the bracket, so that when the column 11 drives the tool holder 3, it simultaneously drives the pressure roller 5 to move longitudinally.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0038] Although the terms frame 1, column 11, and beam 12 are frequently used herein, the use of other terms is not excluded. These terms are used merely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A positioning mechanism for a woodworking processing center, the woodworking processing center comprising a frame (1) and a processing platform (2) horizontally arranged on the frame (1), the positioning mechanism comprising a plurality of lifting frames (4) arranged on the frame (1) and capable of being raised and lowered, and the lifting frames (4) are all located above the processing platform (2), characterized in that: The lifting frame (4) is connected to a pressure roller (5) via an elastic connecting member. Under the elastic support of the connecting member, the pressure roller (5) on each lifting frame (4) is respectively located on the side of the respective lifting frame (4) and has a gap with the respective lifting frame (4). The lower part of the pressure roller (5) is lower than the lower part of the lifting frame (4); the lifting frame (4) is rod-shaped, and the connecting member includes an elastic spring steel wire (6). One end of the spring steel wire (6) is wound and fixed on the lifting frame (4), and the other end is bent downward along the winding direction and wound and fixed on the end of the pressure roller (5). A fixing ring (7) is sleeved on the lifting frame (4), and one end of the spring steel wire (6) is fixed to the fixing ring (7). The fixing ring (7) is locked and fixed to the lifting frame (4) by a plurality of bolts (71) penetrated in the radial direction.

2. The positioning mechanism of a woodworking processing center according to claim 1, characterized in that: The lifting frame (4) is horizontally arranged in the transverse direction, and a plurality of pressing rollers (5) are connected to the lifting frame (4) via a connecting piece, and the plurality of pressing rollers (5) are arranged in sequence in the transverse direction.

3. The positioning mechanism of a woodworking processing center according to claim 2, characterized in that: Each of the pressing rollers (5) is connected to the lifting frame (4) via two connecting pieces, and the two connecting pieces are respectively connected to the two ends of the pressing roller (5).

4. The positioning mechanism of a woodworking processing center according to claim 1, 2 or 3, characterized in that: The pressing roller (5) comprises a rotating shaft (51), both ends of the rotating shaft (51) are rotatably sleeved with connecting sleeves (53), the other ends of the two spring steel wires (6) are respectively wound and fixed on the two connecting sleeves (53), and a buffer sleeve (52) is sleeved on the rotating shaft (51).

5. The positioning mechanism of a woodworking processing center according to claim 1, 2 or 3, characterized in that: The spring steel wire (6) comprises a fixed section (61) and a connecting section (63) both of which are spiral-shaped, and an elastic section (62) located between the fixed section (61) and the connecting section (63). The fixed section (61) is sleeved on the lifting frame (4), and the connecting section (63) is sleeved on the end of the pressure roller (5). One end of the elastic section (62) connected to the fixed section (61) is located above the lifting frame (4) and arches upward in an arc shape, so that there is a gap between the elastic section (62) and the upper part of the lifting frame (4). One end of the elastic section (62) connected to the connecting section (63) extends to the side of the lifting frame (4).

6. The positioning mechanism of a woodworking processing center according to claim 1, 2 or 3, characterized in that: The processing platform (2) is slidably arranged on the frame (1) in the longitudinal direction. The lifting frames (4) are provided in a plurality and are arranged in sequence in the longitudinal direction. The frame (1) is provided with a plurality of driving members capable of independently driving the lifting frames (4) to move upward and downward.

7. The positioning mechanism of a woodworking processing center according to claim 6, characterized in that: The frame (1) is connected to a plurality of lifting seats (9) in a vertical sliding manner on both sides of the processing platform (2), and the plurality of lifting seats (9) on the same side are arranged in sequence along the longitudinal direction. The two ends of the lifting frame (4) are respectively fixed on the lifting seats (9) on both sides. The driving member includes a cylinder (83) located below the lifting seat (9), and the piston rod of the cylinder (83) faces upward and is fixed to the lifting seat (9).

8. The positioning mechanism of a woodworking processing center according to claim 7, characterized in that: The frame (1) is fixed with a plurality of mounting seats (8) on both sides of the processing platform (2), and the plurality of mounting seats (8) are arranged in sequence along the longitudinal direction. Slide rails (82) are fixed vertically on the mounting seats (8). A slider (91) is fixed on the lifting seat (9), and the sliders (91) of the plurality of lifting seats (9) are respectively slidably connected to the slide rails (82) of the plurality of mounting seats (8). The cylinder (83) is fixed on the side of the mounting seat (8).

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