Automatic round hole grinding device for furniture manufacturing

Abstract

The invention discloses an automatic round hole grinding device for furniture manufacturing, and relates to the field of round hole wall grinding, the automatic round hole grinding device comprises a big-end-up circular truncated cone head, the circular truncated cone head is connected with a driving part through a shaft barrel, the driving part is used for driving the circular truncated cone head to lift and rotate, and the automatic round hole grinding device further comprises a plurality of grinding parts annularly distributed around the circular truncated cone head; a sliding groove which obliquely extends up and down is formed along the outer surface of the circular truncated cone head, the grinding piece is in sliding connection with the sliding groove, the grinding piece is provided with a lug plate which extends horizontally, and when the circular truncated cone head penetrates through the circular hole downwards, the lug plate abuts against the top of the circular hole, so that the grinding piece moves upwards along the sliding groove. And in the process, the grinding piece and the sliding groove move relatively to enable the grinding piece to move and expand, the outline of the frosted face is kept to be matched with the size of the round hole, the grinding size does not need to be manually adjusted, round holes of different sizes can be automatically matched and arranged, and the grinding machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of grinding of round hole walls, and particularly to an automatic grinding device for round holes in furniture manufacturing. Background Art

[0002] In furniture production and processing, round holes with various functions are opened for aspects such as material assembly connection, embedding and installation of hardware parts, and furniture decoration structure. Generally, round holes are opened by drilling. The inner surface of the round hole is relatively rough. To improve the assembly stability and aesthetic effect, the inner wall of the round hole needs to be finely ground.

[0003] The grinding of the inner wall of furniture round holes is generally achieved by using a sand roll with a fixed size. A sand roll with a suitable diameter is inserted into the round hole to grind the inner surface, improving the dimensional accuracy and surface quality of the round hole. Since the sizes of round holes with different functions vary greatly, during the automated grinding process, it is necessary to frequently replace the grinding rolls with suitable sizes for different round holes, making the grinding operation cumbersome and the entire grinding process time-consuming. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art problems, the purpose of the present invention is to provide an automatic grinding device for round holes in furniture manufacturing, which is used to solve the problem that the traditional grinding equipment for furniture round holes cannot adapt to round holes with different diameters for rapid grinding.

[0005] In order to solve the prior art problems, the technical solution of the present invention is as follows:

[0006] An automatic grinding device for round holes in furniture manufacturing includes a frustum-shaped head with a larger upper part and a smaller lower part. The frustum-shaped head is connected to a driving member through a shaft cylinder. The driving member is used to drive the frustum-shaped head to lift and rotate. It also includes a plurality of grinding members annularly distributed around the frustum-shaped head. A chute extending obliquely up and down is provided on the outer surface of the frustum-shaped head. The grinding member is slidably connected to the chute. The grinding member has a horizontally extending ear plate. When the frustum-shaped head passes through a round hole downward, the ear plate abuts against the top of the round hole, causing the grinding member to move upward along the chute, expanding the outer peripheral rotation contour of the grinding member to adapt to the round hole. A toothed plate with teeth inclined upward is provided inside the frustum-shaped head. The inner side of the grinding member has a tooth surface with teeth inclined downward. The toothed plate is engaged with the tooth surface to prevent the grinding member from descending. A contraction member is provided inside the frustum-shaped head. The contraction member is used to retract the toothed plate to disengage from the engagement with the tooth surface.

[0007] Preferably, the contraction member includes a rotating seat and a connecting rod. The rotating seat is vertically slidably arranged inside the frustum-shaped head. The bottom end of the toothed plate is hinged to the frustum-shaped head. One end of the connecting rod is hinged to the upper part of the toothed plate, and the other end of the connecting rod is obliquely upward hinged to the rotating seat. A spring is connected between the rotating seat and the frustum to pull down the rotating seat.

[0008] Preferably, a sliding plug is vertically slidably arranged in the shaft cylinder, the bottom of the sliding plug is fixedly connected to the rotating seat, and the top of the shaft cylinder is connected to an air pump, and the air pump draws air to cause the sliding plug to drive the rotating seat to move upward.

[0009] Preferably, a rotary joint is provided on the top of the shaft cylinder, the rotary joint is connected to the air inlet end of the air pump through a hose, and the rotary joint is connected to the external environment through a solenoid valve.

[0010] Preferably, the grinding piece includes a slide and a grinding block, the slide is slidably connected to the slide groove, the tooth surface is located on the inner side of the slide, the outer side of the slide has an embedding groove, the inner side of the grinding block has an embedding block, the embedding block and the embedding groove are adapted to make the grinding block fit against the outer side of the slide, and a plurality of screws pass through the embedding block from the outer side of the slide and are threadedly connected to the slide.

[0011] Preferably, the outer surface of the grinding block has a convex frosted surface, which is a vertically extending arc surface, and the top of the frosted surface has a chamfer that transitions to the outer surface of the grinding block. The ear plate is fixedly connected to the sliding seat, and there is a gap between the ear plate and the frosted surface that is greater than the depth of the circular hole.

[0012] Preferably, a stud is provided through a vertical thread on the surface of the ear plate, and a bottom of the stud has a flat block.

[0013] Preferably, the driving member includes a base frame, a carrier plate is vertically slidably arranged on the surface of the base frame, the shaft tube is rotatably connected to the carrier plate, a cylinder is vertically arranged on the top of the base frame, the telescopic end of the cylinder is connected to the carrier plate through a connector, the cylinder telescopic end is used to drive the round table head to rise and fall, a motor is installed on the surface of the carrier plate, the motor is connected to the shaft tube through a gear set, and the motor is used to drive the round table head to rotate.

[0014] Preferably, the connecting part includes a shell, which is fixedly connected to the carrier plate, the telescopic end of the cylinder is inserted into the shell and fixedly connected to the contact block, the contact block slides vertically with the inner cavity of the shell, a spring is arranged inside the shell to apply an upward elastic force to the contact block, and a micro switch for aligning the contact block is arranged on the inner bottom surface of the shell, and the micro switch is connected to the cylinder and the motor through a controller.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] The height of the grinding piece is positioned by the ear plate contacting the furniture surface, and the round table head is continuously lowered until it contacts the top of the round hole. During this process, the grinding piece and the slide groove move relative to each other to move and expand the grinding piece, so as to keep the contour of the frosted surface adapted to the size of the round hole. There is no need to manually adjust the grinding size. Circular holes of different sizes can be automatically adapted and matched, thereby improving the grinding processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the overall structural schematic diagrams of the present invention;

[0018] Figure 2 The second overall structural schematic diagram of the present invention;

[0019] Figure 3 The alignment structural schematic diagram of the grinding part and the toothed plate of the present invention;

[0020] Figure 4 The opening and closing connection structural schematic diagram of the toothed plate of the present invention;

[0021] Figure 5 The first structural schematic diagram of the grinding part of the present invention;

[0022] Figure 6 The second structural schematic diagram of the grinding part of the present invention;

[0023] Figure 7 The flowchart of circular hole grinding of the present invention;

[0024] Figure 8 The structural schematic diagram of the connecting piece of the present invention.

[0025] Reference numerals: 1, frustum head; 11, shaft cylinder; 12, chute; 2, grinding part; 21, grinding block; 22, sliding seat; 23, tooth surface; 24, ear plate; 25, insert block; 26, insert groove; 27, stud; 3, toothed plate; 31, connecting rod; 4, rotating seat; 41, sliding plug; 5, base frame; 51, carrier plate; 6, motor; 7, cylinder; 8, air pump; 9, connecting piece; 91, housing; 92, contact block; 93, microswitch. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The automatic circular hole grinding device for furniture manufacturing is composed of a driving part, a frustum head 1, a contracting part, and a grinding part 2.

[0028] The driving part is arranged on the furniture automatic processing line. The furniture parts to be positioned and ground pass under the driving part to implement continuous automatic grinding. The driving part can also be paired with a manipulator to implement automatic circular hole grinding.

[0029] As Figure 1 , Figure 2 shown, the driving part includes a base frame 5. The surface of the base frame 5 has two vertical slide rails. Two sliders are arranged on the side of the carrier plate 51. The carrier plate 51 can slide vertically on the surface of the base frame 5 through the adaptation of the slide rails and the sliders. A cylinder 7 is installed on the top of the base frame 5. The cylinder 7 is vertically arranged. The telescopic end of the cylinder 7 extends downward to connect the connecting piece 9. The connecting piece 9 is connected to the carrier plate 51. By controlling the telescopic movement of the cylinder 7, the carrier plate 51 moves vertically along the surface of the base frame 5.

[0030] The frustum head 1 is a frustum-shaped metal body, with the frustum head 1 arranged with a larger upper part and a smaller lower part. At the center position of the top surface of the frustum head 1, a shaft cylinder 11 extending upward is fixed. The shaft cylinder 11 is rotatably connected to the carrier plate 51 through a bearing. The motor 6 is installed on the surface of the carrier plate 51, and the output shaft of the motor 6 is drivingly connected to the shaft cylinder 11 through a continuously meshing gear set.

[0031] As Figure 3 shown, a plurality of grinding members 2 are evenly annularly distributed around the frustum head 1 (taking three groups as an example in this embodiment). Three sliding grooves 12 corresponding to the grinding members 2 are opened on the surface of the frustum head 1. The sliding grooves 12 extend obliquely up and down along the outer peripheral surface of the upper and lower frustum head 1. The cross-section of the sliding groove 12 is convex;

[0032] As Figure 6 shown, the grinding member 2 includes a sliding seat 22 and a grinding block 21. The sliding seat 22 is slidably adapted to the sliding groove 12. The inner surface of the sliding seat 22 has a tooth surface 23 with teeth inclined downward. The grinding block 21 is fixed on the outside of the sliding seat 22. The outer surface of the grinding block 21 has a protruding abrasive surface. The abrasive surface is an arc surface extending vertically. The top of the abrasive surface has a chamfer that is transitionally connected to the outer surface of the grinding block 21. A horizontally extending ear plate 24 is fixed at the top of the sliding seat 22. The extending distance of the ear plate 24 exceeds the abrasive surface of the grinding block 21. There is a gap greater than the depth of the round hole between the ear plate 24 and the abrasive surface.

[0033] As Figure 3 、 Figure 4 shown, the contraction member is arranged inside the frustum head 1. The contraction member includes a rotating seat 4 and a connecting rod 31. A cylindrical chamber is opened inside the frustum head 1, and a fan-shaped gap communicating with the sliding groove 12 is opened on the periphery of the cylindrical chamber. The rotating seat 4 slides vertically in the cylindrical chamber, and a spring is installed at the bottom of the rotating seat 4. The spring applies a downward pulling force to the rotating seat 4. A toothed plate 3 is arranged in each fan-shaped gap. The bottom end of the toothed plate 3 is hinged to the frustum head 1, and the top end of the toothed plate 3 is a free end. One end of the connecting rod 31 is hinged to the upper part of the toothed plate 3, and the other end of the connecting rod 31 is inclined upward and hinged to the rotating seat 4. The teeth of the toothed plate 3 are inclined upward;

[0034] As Figure 1 、 Figure 2 、 Figure 3 shown, a sliding plug 41 is vertically slidably arranged inside the shaft cylinder 11. The bottom of the sliding plug 41 is fixedly connected to the rotating seat 4. A rotary joint is sealed and rotatably installed at the top of the shaft cylinder 11, and a bracket is fixed on the surface of the carrier plate 51. The bracket is used to limit the angle of the rotary joint. An air pump 8 is installed at the top of the base frame 5. The near-air end of the air pump 8 is connected to the rotary joint through a hose, and a solenoid valve is installed on the side of the rotary joint to connect to the external environment.

[0035] As Figure 7As shown in the figure, the grinding work on the round holes of the furniture is as follows:

[0036] Step 1: In the initial state, the round table head 1 is at a high position, and the grinding member 2 is located at the bottom of the sliding groove 12, making the grinding member 2 in a retracted state. At this time, the turntable 4 has a tendency to descend under the action of elastic force. The turntable 4 pushes the toothed plate 3 to expand outward through the connecting rod 31 and engages with the toothed surface 23;

[0037] Step 2: Place the furniture part below the round table head 1, align the round hole with the round table head 1, and start the air cylinder 7 to extend, pushing the carrier plate 51 to drive the round table head 1 to descend. The bottom end of the round table head 1 passes through the round hole downward. When the ear plate 24 touches the furniture surface at the top of the round hole, the height of the grinding member 2 is restricted by the furniture part. At this time, the abrasive surface of the grinding block 21 has reached below the round hole;

[0038] Step 3: As the round table head 1 continues to descend, since the teeth of the toothed surface 23 slope downward and the teeth of the toothed plate 3 slope upward, the grinding member 2 can slide upward relative to the sliding groove 12, causing the position of the abrasive surface of the grinding block 21 to gradually expand and move outward. When the round table head 1 reaches the maximum descent position, that is, the outer surface of the round table head 1 touches the top opening of the round hole, at this time, the rotation contour of the abrasive surface of the grinding block 21 matches the round hole. Through the reverse tooth engagement of the toothed surface 23 and the toothed plate 3, the descent of the grinding member 2 relative to the round table head 1 is restricted;

[0039] Step 4: Start the air cylinder 7 to contract, driving the carrier plate 51 and the round table head 1 to move upward. At the same time, start the motor 6 to drive the shaft cylinder 11 to drive the round table head 1 to rotate, and grind the inner wall of the round hole through the abrasive surface of the grinding block 21 until the round table head 1 drives the grinding member 2 to move upward to the position in Step 1, completing the grinding work;

[0040] Step 5: Start the air pump 8 to pump air, causing the sliding plug 41 to move upward in the shaft cylinder 11, driving the turntable 4 to rise. Through the pulling of the connecting rod 31, the toothed plate 3 rotates and retracts, and the toothed plate 3 disengages from the engagement with the toothed surface 23. Under the action of gravity, the grinding member 2 slides back to the bottom of the sliding groove 12. Then turn off the air pump 8 and open the solenoid valve to eliminate the negative pressure in the shaft cylinder 11. Under the action of elastic force, the turntable 4 rises, and the toothed plate 3 expands again to engage with the toothed surface 23, waiting for the next grinding work.

[0041] The operations of the motor 6, air cylinder 7, air pump 8, and solenoid valve in the above steps are all completed through the programming control of the controller. The working switching response principle between Step 3 and Step 4 is as follows:

[0042] As Figure 8As shown, the connecting piece 9 includes a housing 91. The housing 91 is fixedly connected to the carrier plate 51. The telescopic end of the cylinder 7 is inserted into the interior of the housing 91 and fixedly connected to a contact block 92. The contact block 92 slides vertically in the inner cavity of the housing 91. A spring that applies an upward elastic force to the contact block 92 is provided inside the housing 91. A microswitch 93 for aligning with the contact block 92 is provided on the inner bottom surface of the housing 91. The microswitch 93 is connected to the cylinder 7 and the motor 6 through a controller;

[0043] When the cylinder 7 extends, it pushes the contact block 92 downward. Due to the elastic force of the spring and the gravity of the carrier plate 51 and the conical head 1, the carrier plate 51 and the conical head 1 descend. When the conical head 1 descends to abut against the top opening of the round hole, the conical head 1 cannot continue to descend. When the cylinder 7 continues to extend, the contact block 92 overcomes the elastic force and descends to touch the microswitch 93. The controller will stop the extension of the cylinder 7 and control the cylinder 7 to rise and the motor 6 to drive the conical head 1 to rotate.

[0044] The top of the frosted surface has a chamfer that is transitionally connected to the outer surface of the grinding block 21, enabling the frosted surface to smoothly enter the round hole from bottom to top.

[0045] As Figure 5 、 Figure 6 shown, the outer side of the sliding seat 22 has an embedding groove 26, and the inner side of the grinding block 21 has an embedding block 25. The embedding block 25 is adapted to the embedding groove 26 so that the grinding block 21 fits against the outer side of the sliding seat 22. A plurality of screws penetrate through the embedding block 25 from the outer side of the sliding seat 22 and are threadedly connected to the sliding seat 22, assembling and fixing the grinding block 21 and the sliding seat 22 into one body. Later, the grinding block 21 can be independently removed and replaced by removing the screws.

[0046] The key technical point of the grinding device is that the ear plate 24 is blocked by the furniture surface at the top of the round hole, keeping the height of the grinding part 2 positioned. When the conical head 1 continues to descend, the sliding groove 12 pushes the grinding part 2 to expand. It is necessary to ensure that when the surface of the conical head 1 abuts against the top opening of the round hole, the frosted surface of the grinding block 21 expands to match the size of the round hole. As the frosted surface wears, it will affect the grinding accuracy. Therefore, in this application, a stud 27 is vertically threaded through the surface of the ear plate 24. The bottom of the stud 27 has a flat block. By abutting the flat block against the furniture surface at the top of the round hole and rotating the stud 27, the abutting position is adjusted to fine-tune the expansion amplitude of the frosted surface.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An automatic round hole grinding device for furniture manufacturing, comprising: The invention discloses a truncated cone head (1) which is larger at the top and smaller at the bottom. The truncated cone head (1) is connected to a driving member via a shaft tube (11). The driving member is used to drive the truncated cone head (1) to rise and fall and rotate. The invention is characterized in that the truncated cone head (1) further comprises a plurality of grinding members (2) which are distributed in an annular manner around the truncated cone head (1). A sliding groove (12) which extends obliquely up and down is provided along the outer surface of the truncated cone head (1). The grinding member (2) is slidably connected to the sliding groove (12). The grinding member (2) has a horizontally extending ear plate (24). When the truncated cone head (1) passes through a circular hole at the bottom, the ear plate (24) is moved downward. The plate (24) contacts the top of the circular hole, so that the grinding piece (2) moves upward along the slide groove (12), expanding the outer rotation profile of the grinding piece (2) to adapt to the circular hole. The interior of the truncated cone head (1) is provided with a tooth plate (3) with teeth inclined upward, and the inner side of the grinding piece (2) has a tooth surface (23) with teeth inclined downward. The tooth plate (3) is engaged with the tooth surface (23) to prevent the grinding piece (2) from falling. A contraction piece is provided inside the truncated cone head (1), and the contraction piece is used to retract the tooth plate (3) to disengage from the engagement with the tooth surface (23).

2. The automatic round hole grinding device for furniture manufacturing according to claim 1 is characterized in that: The retracting member comprises a swivel seat (4) and a connecting rod (31); the swivel seat (4) is vertically slidably arranged in the truncated cone head (1); the bottom end of the tooth plate (3) is hinged to the truncated cone head (1); one end of the connecting rod (31) is hinged to the upper part of the tooth plate (3); the other end of the connecting rod (31) is hinged to the swivel seat (4) at an angle upward; a spring is connected between the swivel seat (4) and the truncated cone for pulling down the swivel seat (4).

3. The automatic round hole grinding device for furniture manufacturing according to claim 2 is characterized in that: A sliding plug (41) is vertically slidably arranged in the shaft cylinder (11), the bottom of the sliding plug (41) is fixedly connected to the rotating seat (4), and the top of the shaft cylinder (11) is connected to an air pump (8), which pumps air to cause the sliding plug (41) to drive the rotating seat (4) to move upward.

4. The automatic round hole grinding device for furniture manufacturing according to claim 3 is characterized in that: A rotating joint is provided on the top of the shaft cylinder (11), the rotating joint is connected to the air inlet end of the air pump (8) via a hose, and the rotating joint is connected to the external environment via a solenoid valve.

5. The automatic round hole grinding device for furniture manufacturing according to claim 1 is characterized in that: The grinding piece (2) comprises a slide seat (22) and a grinding block (21), the slide seat (22) is slidably connected to the slide groove (12), the tooth surface (23) is located on the inner side of the slide seat (22), the outer side of the slide seat (22) is provided with an embedding groove (26), the inner side of the grinding block (21) is provided with an embedding block (25), the embedding block (25) and the embedding groove (26) are adapted to make the grinding block (21) fit the outer side of the slide seat (22), and a plurality of screws pass through the embedding block (25) from the outer side of the slide seat (22) and are threadedly connected to the slide seat (22).

6. The automatic round hole grinding device for furniture manufacturing according to claim 5 is characterized in that: The outer surface of the grinding block (21) has a convex frosted surface, which is a vertically extending arc-shaped surface, and the top of the frosted surface has a chamfer that transitions with the outer surface of the grinding block (21). The ear plate (24) is fixedly connected to the slide seat (22), and there is a gap between the ear plate (24) and the frosted surface that is greater than the depth of the circular hole.

7. The automatic round hole grinding device for furniture manufacturing according to claim 1, characterized in that: The surface of the ear plate (24) is vertically threaded with a stud (27) which penetrates through the stud. The bottom of the stud (27) has a flat block.

8. The automatic round hole grinding device for furniture manufacturing according to claim 1, characterized in that: The driving member comprises a base frame (5), a carrier plate (51) is vertically slidably arranged on the surface of the base frame (5), the shaft cylinder (11) is rotatably connected to the carrier plate (51), a cylinder (7) is vertically arranged on the top of the base frame (5), the telescopic end of the cylinder (7) is connected to the carrier plate (51) through a connecting member (9), the cylinder (7) is telescopically used to drive the truncated table head (1) to rise and fall, a motor (6) is installed on the surface of the carrier plate (51), the motor (6) is connected to the shaft cylinder (11) through a gear set, and the motor (6) is used to drive the truncated table head (1) to rotate.

9. The automatic round hole grinding device for furniture manufacturing according to claim 8, characterized in that: The connecting member (9) comprises a shell (91), the shell (91) is fixedly connected to the carrier plate (51), the telescopic end of the cylinder (7) is inserted into the shell (91) and fixedly connected to the contact block (92), the contact block (92) slides vertically with the inner cavity of the shell (91), a spring for applying an upward elastic force to the contact block (92) is arranged inside the shell (91), and a micro switch (93) for aligning the contact block (92) is arranged on the inner bottom surface of the shell (91), and the micro switch (93) is connected to the cylinder (7) and the motor (6) through a controller.

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