Multifunctional integrated sofa iron stand processing machine tool

Abstract

According to the multifunctional integrated sofa iron stand machining machine tool in the field of grinding machine tools, the two ends of a grinding strip are movable through a pair of sliding barrels arranged at the two ends of the grinding strip, spiral springs and fixed barrels arranged on the outer sides of the sliding barrels in a sleeving mode, and the grinding strip can be conveniently attached to the surface of a pipe fitting; the fitting area and fitting effect of the polishing strip and the surface of the pipe fitting are improved, the mode that polishing abrasive paper is manually held to make contact with an iron stand body for polishing is replaced, the polishing quality is improved, meanwhile, a driving mechanism is used for driving a rotating ring and the polishing strip to make circular motion, the polishing strip makes rotating contact with the surface of the pipe fitting, and the polishing strip makes full contact with the surface of the pipe fitting; and in addition, by means of a sliding ring and a pressure sensor which are installed in a fixing cylinder and abut against a spiral spring, the pulling force borne by the grinding strip is monitored in real time, and the grinding pressure can be conveniently adjusted in cooperation with a mechanical arm.

Description

Technical Field

[0001] The invention relates to a machine tool, in particular to a multifunctional integrated sofa iron frame processing machine tool applied to the field of grinding machine tools. Background Art

[0002] The sofa iron frame is usually assembled from multiple metal pipes through a welding process. During its manufacturing process, the sofa iron frame with a frame structure needs to be finely polished for multiple times. This process includes surface roughening and polishing in the pre-painting stage to improve coating adhesion, as well as polishing after painting to enhance gloss and surface smoothness. However, the current polishing of sofa iron frames generally relies on manual handheld sandpaper. The polishing quality depends to a large extent on the professional skills and experience of the operator, which specifically involves details such as pressure control during polishing and planning of the polishing path. These factors make it difficult for the polishing effect to reach a stable and expected standard.

[0003] The existing patent with publication number CN219945542U discloses an iron frame grinding device for bed processing, including a device main body, wherein two mutually symmetrical conveying mechanisms are arranged in the device main body, and a plurality of blocks are arranged and installed on the conveying belt of the conveying mechanism, and a feed trough is obliquely arranged on the rear side of the conveying mechanism, and a fixed clamping block and a movable clamping block for clamping materials are arranged at the bottom of the device main body, and grinding mechanisms for grinding both ends of the material are symmetrically arranged on both sides of the fixed clamping block and the movable clamping block, and the cut steel pipe is put into between the two clamping blocks through the conveying mechanism for clamping and fixing, and then the steel pipe is polished by the grinding mechanism, so that machinery replaces manual labor, reduces manpower consumption, and avoids damage to the human body during manual grinding operations.

[0004] The above patent discloses a grinding method using machinery instead of manual work, but does not solve the problem of how to evenly grind the frame-shaped sofa iron frame. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing sofa iron frame is manually polished, resulting in low polishing efficiency and poor polishing uniformity.

[0006] In order to solve the above problems, the present invention provides a multifunctional integrated sofa iron frame processing machine tool, comprising a machine tool base, a bearing plate for clamping the iron frame body is installed on the machine tool base, a mechanical arm fixedly connected to the machine tool base is provided on one side of the bearing plate, and a grinding mechanism is fixedly connected to the movable end of the mechanical arm; the grinding mechanism comprises a mounting ring with a notch and a rotating ring rotatably nested inside the mounting ring, and the rotating ring is connected to a driving mechanism fixed on the mounting ring and used to drive the rotating ring to rotate in a circle;

[0007] A fixed cylinder is fixedly nested in the rotating ring, and a pair of sliding cylinders slidably connected to the inner wall of the fixed cylinder are nested in the fixed cylinder. The pair of sliding cylinders respectively pass through the two ends of the fixed cylinder and extend to the outside thereof. A grinding strip extending to the inside of the rotating ring is fixedly connected between the pair of sliding cylinders, and the grinding strip is located on the outside of the fixed cylinder; the outsides of the pair of sliding cylinders are both sleeved with coil springs nested in the fixed cylinder, and a sliding ring sleeved on the outside of the sliding cylinder is abutted under one of the coil springs, and the sliding ring is fixedly connected to a pressure sensor fixedly connected to the inner wall of the end of the fixed cylinder.

[0008] In the above-mentioned multifunctional integrated sofa iron frame processing machine, the grinding efficiency is improved and uniform grinding with adjustable grinding pressure is achieved by installing a rotating ring that can rotate in a circle and a pressure sensor for monitoring the tension of the grinding strip.

[0009] As a further improvement of the present application, the grinding strip includes a hollow flexible tube, on which a plurality of equally spaced grinding rings are fixedly mounted, a dust collecting gap is formed between adjacent grinding rings, a dust suction hole connecting the dust collecting gap and the inner cavity of the flexible tube is opened on the outer wall of the flexible tube, a dust suction pipe connected to the interior of the fixed tube is fixedly connected to the end of the fixed tube, and the dust suction pipe passes through the rotating ring and is connected to an external negative pressure vacuum cleaner.

[0010] As a further improvement of the present application, both the rotating ring and the mounting ring are annular structures, and a notch is provided on the rotating ring to cooperate with the mounting ring.

[0011] As a further improvement of the present application, a guide cavity is provided in the rotating ring, an arc-shaped guide groove is provided in the guide cavity near the inner end surface of the rotating ring, a fixed cylinder is fixedly installed in the middle of the guide cavity, and both ends of the grinding strip can move through the arc-shaped guide groove and extend into the guide cavity.

[0012] As a further improvement of the present application, a gear ring is fixedly connected to the outer wall of the rotating ring, the gear ring matches the shape of the rotating ring and has arc-shaped and equidistantly distributed latching teeth fixedly connected to its surface, the driving mechanism includes a driving gear meshing with the gear ring and a driving motor connected to the driving gear, and the driving motor is fixedly connected to the mounting ring.

[0013] As a further improvement of the present application, the fixed cylinder and the sliding cylinder are arc-shaped cylinders with openings at both ends. Both ends of the sliding cylinder are provided with raised rings. The raised ring at the upper end of the sliding cylinder is nested in the fixed cylinder and slidably abuts against the inner wall of the fixed cylinder. The raised ring at the lower end of the sliding cylinder is fixedly connected to the end of the flexible tube. The fixed cylinder, the sliding cylinder and the flexible tube are connected to realize the suction flow of debris.

[0014] As a further improvement of the present application, a hard tube is fixedly nested in the dust suction hole, the inner cavity of the flexible tube is connected with the dust collecting gap through the hard tube, the flexible tube is made of rubber material, and the hard tube is made of plastic material.

[0015] As a further improvement of the present application, the grinding ring is a circular ring structure with an isosceles trapezoidal cross-section, and its two outer end edges are arc-shaped surfaces.

[0016] To summarize, the present invention provides a pair of sliding cylinders, a spiral spring and a fixed cylinder sleeved on the outside of the sliding cylinder at both ends of the grinding strip, so that the two ends of the grinding strip are movable ends, which is convenient for the grinding strip to fit on the surface of the pipe fitting, thereby improving the fitting area and fitting effect between the grinding strip and the surface of the pipe fitting, replacing the method of manually holding the grinding sandpaper and contacting the iron frame body for grinding, thereby improving the grinding quality. At the same time, the driving mechanism is used to drive the rotating ring and the grinding strip to make circular motion, and the grinding strip and the surface of the pipe fitting are in rotational contact, so that the grinding strip and the surface of the pipe fitting are fully in contact, thereby improving the grinding speed. In addition, the sliding ring and the pressure sensor installed in the fixed cylinder and abutting the spiral spring are used to monitor the tension of the grinding strip in real time, which is convenient for cooperating with the mechanical arm to adjust the grinding pressure, so that the contact pressure between the grinding strip and each part of the surface of the pipe fitting is consistent during grinding, thereby improving the uniformity of grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0018] Figure 2 It is a front view stereoscopic structural diagram of the grinding mechanism in this application;

[0019] Figure 3 It is a rear-view stereoscopic structural schematic diagram of the grinding mechanism in this application;

[0020] Figure 4 It is a cross-sectional structural schematic diagram of the grinding mechanism in this application;

[0021] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 6 It is a schematic diagram of the motion state of the grinding strip in this application;

[0023] Figure 7 It is a schematic diagram of the exploded assembly structure of the grinding mechanism in this application;

[0024] Figure 8 It is a schematic diagram of the cross-sectional structure of the rotating ring in this application;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the grinding strip in this application;

[0026] Fig.10 It is a schematic diagram of the cross-sectional structure of the grinding strip in this application;

[0027] Fig.11 for Fig.10A schematic diagram of the enlarged structure at B in the middle;

[0028] Fig.12 It is a schematic diagram of the movement state of grinding debris in this application.

[0029] Description of the numbers in the figure:

[0030] 1. Machine tool base; 2. Carrying plate; 3. Iron frame body; 4. Robotic arm; 5. Grinding mechanism; 6. Mounting ring; 7. Rotating ring; 701. Guide cavity; 7011. Arc guide groove; 8. Driving mechanism; 9. Grinding strip; 10. Gear ring; 11. Driving gear; 12. Driving motor; 13. Fixed cylinder; 14. Sliding cylinder; 15. Coil spring; 16. Sliding ring; 17. Pressure sensor; 18. Flexible tube; 19. Grinding ring; 1901. Dust collection gap; 20. Dust suction hole; 21. Hard tube; 22. Dust suction tube; 23. Visual positioning camera. DETAILED DESCRIPTION

[0031] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] Figure 1-8 A multifunctional integrated sofa iron frame processing machine tool is shown, comprising a machine tool base 1, a bearing plate 2 for clamping an iron frame body 3 is installed on the machine tool base 1, a mechanical arm 4 fixedly connected to the machine tool base 1 is provided on one side of the bearing plate 2, and a grinding mechanism 5 is fixedly connected to the movable end of the mechanical arm 4; the grinding mechanism 5 comprises a mounting ring 6 with a notch and a rotating ring 7 rotatably nested inside the mounting ring 6, the rotating ring 7 is connected to a driving mechanism 8 fixed on the mounting ring 6 and used to drive the rotating ring 7 to rotate in a circle; a fixed cylinder 13 is fixedly nested in the rotating ring 7, and the fixed cylinder 13 is fixedly nested in the fixed cylinder 13 A pair of sliding cylinders 14 are nested and slidably connected to the inner wall thereof, and the pair of sliding cylinders 14 respectively penetrate the two ends of the fixed cylinder 13 and extend to the outside thereof, and a grinding strip 9 extending to the inside of the rotating ring 7 is fixedly connected between the pair of sliding cylinders 14, and the grinding strip 9 is located on the outside of the fixed cylinder 13; the outer sides of the pair of sliding cylinders 14 are both sleeved with coil springs 15 nested in the fixed cylinder 13, and a sliding ring 16 sleeved on the outside of the sliding cylinder 14 is abutted under one of the coil springs 15, and the sliding ring 16 is fixedly connected to a pressure sensor 17 fixedly connected to the inner wall of the end of the fixed cylinder 13.

[0034] For details, please refer to Figure 1 and Figure 6When the iron frame body 3 is being polished, the mechanical arm 4 drives the polishing mechanism 5 to move to the outside of the pipe fitting of the iron frame body 3, so that the mounting ring 6 and the rotating ring 7 are sleeved on the outside of the pipe fitting and the polishing strip 9 contacts the outer wall of the pipe fitting. During the contact between the polishing strip 9 and the pipe fitting, the polishing strip 9 is recessed outward, and the polishing strip 9 extends out from the rotating ring 7. The coil spring 15 is compressed, and the coil spring 15 squeezes the sliding ring 16, and the sliding ring 16 squeezes the pressure sensor 17, thereby obtaining the extrusion pressure data of the polishing strip 9 on the pipe fitting. By adjusting the mechanical arm 4, the contact polishing pressure between the polishing strip 9 and the pipe fitting is controlled to improve the force uniformity of the pipe fitting during polishing, and then the driving mechanism 8 is started. The driving mechanism 8 enables the rotating ring 7 to drive the polishing strip 9 to rotate in a circle, and the polishing strip 9 performs circular rotation polishing on the pipe fitting, further improving the polishing uniformity and improving the polishing quality.

[0035] Compared with the traditional sofa iron frame processing machine, the present invention provides a pair of sliding cylinders 14, a spiral spring 15 and a fixed cylinder 13 sleeved on the outside of the sliding cylinder 14 at both ends of the grinding strip 9, so that the two ends of the grinding strip 9 are movable ends, which is convenient for the grinding strip 9 to fit on the surface of the pipe fitting, improves the fitting area and fitting effect of the grinding strip 9 and the surface of the pipe fitting, replaces the manual holding of the grinding sandpaper and the contact grinding with the iron frame body 3, improves the grinding quality, and at the same time, utilizes the rotating ring 7 connected to the grinding strip 9 and connected to the driving mechanism 8 to drive The mechanism 8 drives the rotating ring 7 and the grinding strip 9 to make circular motion, and the grinding strip 9 makes rotational contact with the surface of the pipe fitting, so that the grinding strip 9 is in full contact with the surface of the pipe fitting, thereby improving the grinding speed. In addition, the sliding ring 16 and the pressure sensor 17 installed in the fixed cylinder 13 and abutting against the coil spring 15 are used to monitor the tension on the grinding strip 9 in real time, so as to cooperate with the robot arm 4 to adjust the grinding pressure, so that the contact pressure between the grinding strip 9 and various parts of the pipe fitting surface is consistent during grinding, thereby improving the uniformity of grinding.

[0036] See also Figure 7 Both the rotating ring 7 and the mounting ring 6 are annular structures, and a notch matching with the mounting ring 6 is provided on the rotating ring 7.

[0037] It should be noted that the iron frame body 3 is formed by welding multiple pipes into one piece. In order to facilitate the grinding of each pipe, the gaps of the mounting ring 6 and the rotating ring 7 are relatively connected. The mounting ring 6 and the rotating ring 7 are driven to move by the mechanical arm 4, so that the rotating ring 7 is sleeved on the outside of the pipe.

[0038] See also Figure 1 The robot arm 4 is a multi-degree-of-freedom robot arm. A rotating motor fixedly connected to the machine tool base 1 is fixedly connected below the carrier plate 2, and a visual positioning camera 23 is provided above the carrier plate 2.

[0039] Specifically, the polishing mechanism 5 is positioned by the visual positioning camera 23 , so as to facilitate automatic polishing of different pipe fittings of the iron frame body 3 .

[0040] See also Figure 8 A guide cavity 701 is provided in the rotating ring 7, and an arc-shaped guide groove 7011 is provided near the inner end surface of the rotating ring 7. The fixed cylinder 13 is fixedly installed in the middle of the guide cavity 701, and both ends of the grinding strip 9 movably pass through the arc-shaped guide groove 7011 and extend into the guide cavity 701.

[0041] Specifically, the grinding strip 9 can enter and exit the guide cavity 701 more smoothly.

[0042] See also Figure 4 A gear ring 10 is fixedly connected to the outer wall of the rotating ring 7. The gear ring 10 matches the shape of the rotating ring 7 and has arc-shaped and equidistantly distributed latching teeth fixedly connected on its surface. The driving mechanism 8 includes a driving gear 11 meshing with the gear ring 10 and a driving motor 12 connected to the driving gear 11. The driving motor 12 is fixedly connected to the mounting ring 6.

[0043] Specifically, the driving motor 12 drives the driving gear 11 to rotate, the driving gear 11 drives the gear ring 10 to rotate, the gear ring 10 drives the rotating ring 7 to make a circular rotation in the mounting ring 6, and then drives the grinding strip 9 to make a circular rotation.

[0044] Second implementation method:

[0045] Figure 3 , Figure 7 , Figure 9-12 A multifunctional integrated sofa iron frame processing machine is shown. Based on the first embodiment, the grinding strip 9 includes a hollow flexible tube 18, on which a plurality of equidistantly distributed grinding rings 19 are fixedly sleeved, and a dust collecting gap 1901 is formed between adjacent grinding rings 19. The outer wall of the flexible tube 18 is provided with a dust suction hole 20 connecting the dust collecting gap 1901 and the inner cavity of the flexible tube 18. The end of the fixed tube 13 is fixedly connected with a dust suction pipe 22 connected to the interior thereof, and the dust suction pipe 22 passes through the rotating ring 7 and is connected to an external negative pressure vacuum cleaner.

[0046] For details, please refer to Fig.11 and Fig.12 When the grinding bar 9 is rotating and grinding, the external negative pressure vacuum cleaner is started, and the flexible tube 18 makes the grinding ring 19 fit better on the surface of the pipe. The grinding ring 19 slides and grinds the surface of the pipe along with the flexible tube 18, and the debris generated by the grinding falls into the dust collecting gap 1901. Under the negative pressure suction action of the external negative pressure vacuum cleaner, the grinding debris enters the inner cavity of the flexible tube 18 through the dust suction hole 20 and is then discharged into the external negative pressure vacuum cleaner through the dust suction tube 22.

[0047] Compared with the traditional machine tools which have a separate dust suction device on one side of the grinding device, the present invention adopts a grinding bar 9 with equidistantly distributed grinding rings 19 on the surface, and utilizes the dust collecting gap 1901 formed between adjacent grinding rings 19 to collect dust at the grinding interface, thereby reducing dust dispersion and improving the collection effect of grinding debris.

[0048] See also Figure 3 The fixed cylinder 13 and the sliding cylinder 14 are both arc-shaped cylinders with openings at both ends. Both ends of the sliding cylinder 14 are provided with raised rings. The raised ring at the upper end of the sliding cylinder 14 is nested in the fixed cylinder 13 and slides against the inner wall of the fixed cylinder 13. The raised ring at the lower end of the sliding cylinder 14 is fixedly connected to the end of the flexible tube 18. The fixed cylinder 13, the sliding cylinder 14 and the flexible tube 18 are connected to realize the suction flow of debris.

[0049] Specifically, the fixed cylinder 13 and the sliding cylinder 14 of the arc-shaped cylindrical structure make the grinding mechanism 5 small and compact, and realize the elastic connection of the grinding strip 9 and the efficient collection of grinding debris.

[0050] See also Fig.11 A hard tube 21 is fixedly nested in the dust suction hole 20, and the inner cavity of the flexible tube 18 is connected with the dust collecting gap 1901 through the hard tube 21. The flexible tube 18 is made of rubber material, and the hard tube 21 is made of plastic material.

[0051] Specifically, during the grinding process, the flexible tube 18 made of rubber material enables the grinding ring 19 to better fit the surface of the pipe, and the hard tube 21 made of plastic material supports the dust suction hole 20 to prevent the dust suction hole 20 from being squeezed and closed when the flexible tube 18 is deformed, thereby improving the dust suction effect.

[0052] See also Fig.11 The grinding ring 19 is a circular ring structure with an isosceles trapezoidal cross section, and its two outer end edges are arc-shaped surfaces.

[0053] Specifically, the flexible tube 18 drives the grinding ring 19 to slide and grind on the surface of the pipe more smoothly, and at the same time, it is easy for grinding debris to enter the dust collecting gap 1901.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A multifunctional integrated sofa iron frame processing machine tool, characterized in that: The invention comprises a machine tool base (1), a bearing plate (2) for clamping an iron frame body (3) is installed on the machine tool base (1), a mechanical arm (4) fixedly connected to the machine tool base (1) is provided on one side of the bearing plate (2), and a grinding mechanism (5) is fixedly connected to the movable end of the mechanical arm (4); the grinding mechanism (5) comprises a mounting ring (6) provided with a notch and a rotating ring (7) rotatably nested inside the mounting ring (6), and the rotating ring (7) is connected to a driving mechanism (8) fixed on the mounting ring (6) and used for driving the rotating ring (7) to perform circular rotation; A fixed cylinder (13) is fixedly nested in the rotating ring (7), and a pair of sliding cylinders (14) are nested in the fixed cylinder (13) and are slidably connected to the inner wall thereof. The pair of sliding cylinders (14) respectively penetrate the two ends of the fixed cylinder (13) and extend to the outside thereof. A grinding strip (9) extending to the inside of the rotating ring (7) is fixedly connected between the pair of sliding cylinders (14), and the grinding strip (9) is located outside the fixed cylinder (13); the outer sides of the pair of sliding cylinders (14) are both sleeved with a coil spring (15) nested in the fixed cylinder (13), and a sliding ring (16) sleeved on the outer side of the sliding cylinder (14) is abutted below one of the coil springs (15), and the sliding ring (16) is fixedly connected with a pressure sensor (17) fixedly connected to the inner wall of the end of the fixed cylinder (13).

2. The multifunctional integrated sofa iron frame processing machine tool according to claim 1, characterized in that: The grinding strip (9) comprises a hollow flexible tube (18), a plurality of equally spaced grinding rings (19) are fixedly sleeved on the flexible tube (18), a dust collecting gap (1901) is formed between adjacent grinding rings (19), a dust suction hole (20) communicating with the dust collecting gap (1901) and the inner cavity of the flexible tube (18) is provided on the outer wall of the flexible tube (18), a dust suction pipe (22) communicating with the interior of the fixed tube (13) is fixedly connected to the end of the fixed tube (13), and the dust suction pipe (22) passes through the rotating ring (7) and is connected with an external negative pressure vacuum cleaner.

3. The multifunctional integrated sofa iron frame processing machine tool according to claim 1, characterized in that: The rotating ring (7) and the mounting ring (6) are both annular structures, and a notch is provided on the rotating ring (7) to match the mounting ring (6).

4. The multifunctional integrated sofa iron frame processing machine tool according to claim 1, characterized in that: The rotating ring (7) is provided with a guide cavity (701), and the guide cavity (701) is provided with an arc-shaped guide groove (7011) near the inner end surface of the rotating ring (7). The fixed cylinder (13) is fixedly installed in the middle of the guide cavity (701), and the two ends of the grinding strip (9) movably pass through the arc-shaped guide groove (7011) and extend into the guide cavity (701).

5. The multifunctional integrated sofa iron frame processing machine tool according to claim 1, characterized in that: The outer wall of the rotating ring (7) is fixedly connected to a gear ring (10), the gear ring (10) matches the shape of the rotating ring (7) and has arc-shaped equidistantly distributed latching teeth fixedly connected to its surface, the driving mechanism (8) comprises a driving gear (11) meshing with the gear ring (10) and a driving motor (12) connected to the driving gear (11), and the driving motor (12) is fixedly connected to the mounting ring (6).

6. The multifunctional integrated sofa iron frame processing machine tool according to claim 2, characterized in that: The fixed cylinder (13) and the sliding cylinder (14) are both arc-shaped cylinders with openings at both ends. Both ends of the sliding cylinder (14) are provided with raised rings. The raised ring at the upper end of the sliding cylinder (14) is nested in the fixed cylinder (13) and is in sliding contact with the inner wall of the fixed cylinder (13). The raised ring at the lower end of the sliding cylinder (14) is fixedly connected to the end of the flexible tube (18). The fixed cylinder (13), the sliding cylinder (14) and the flexible tube (18) are connected to realize the suction flow of debris.

7. The multifunctional integrated sofa iron frame processing machine tool according to claim 2, characterized in that: A hard tube (21) is fixedly nested in the dust suction hole (20); the inner cavity of the flexible tube (18) is connected to the dust collecting gap (1901) through the hard tube (21); the flexible tube (18) is made of rubber material, and the hard tube (21) is made of plastic material.

8. The multifunctional integrated sofa iron frame processing machine tool according to claim 2, characterized in that: The grinding ring (19) is a circular ring structure with an isosceles trapezoidal cross section, and the edges of its two outer ends are arc-shaped surfaces.

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