Grinding machine grinding wheel automatic dresser capable of detecting cracks

Abstract

The grinding machine grinding wheel automatic dresser comprises a shell, the inner side wall of the shell is slidably connected with a base, the back face of the base is connected with a ball screw through a threaded hole, the front face of the base is provided with a first motor and a connecting shaft, one end of the connecting shaft is connected with a shaping roller, and the shaping roller and a grinding wheel are located on the same plane. The gullies in the surface of the grinding wheel are filled and leveled in the mode that the grinding wheel is filled with the magnetic powder, then the grinding wheel in the filled and leveled state is polished, if the magnetic field sensor detects that the magnetic powder is still left on the surface of the grinding wheel, polishing is continued, and if no magnetic force exists after the grinding wheel rotates by one circle, it is indicated that the gullies are completely filled and leveled; therefore, whether the gullies still exist in the surface of the grinding wheel can be accurately judged, the grinding depth of each time depends on the depth of the deepest pit in the surface of the grinding wheel, a fixed numerical value does not need to be fed at a time when different abrasions are carried out, the use frequency of the grinding wheel is greatly reduced, and the abrasion loss of the grinding wheel is reduced.

Description

Technical Field

[0001] The present invention relates to the field of grinding wheel dressing, and in particular to an automatic grinding wheel dresser for a grinding machine that can detect cracks. Background Art

[0002] The grinding wheel is mainly used to grind the surface of the workpiece. During the grinding process, pits and other wear will appear on the grinding surface of the grinding wheel. At this time, the grinding wheel itself needs to be corrected. However, during the correction process of the grinding wheel, the amount of each dressing is a fixed value, which leads to an accelerated scrapping time of the grinding wheel. Those skilled in the art cannot formulate different and wear-based dressing amounts each time according to the actual wear amount of the grinding wheel. Therefore, how to improve the service life of each grinding wheel is one of the problems for those skilled in the art.

[0003] For this reason, we propose an automatic grinding wheel dresser for a grinding machine that can detect cracks to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic grinding wheel dresser for a grinding machine that can detect cracks to solve the problems proposed in the above background art. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem of the overly single solution of the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An automatic grinding wheel dresser for a grinding machine that can detect cracks, including a housing. A base is slidably connected to the inner side wall of the housing. A ball screw is connected to the back of the base through a threaded hole. A motor one and a connecting shaft are arranged on the front of the base. One end of the connecting shaft is connected to a dressing roller in the same plane as the grinding wheel.

[0006] In a further embodiment, pulley wheels are arranged at the rotating ends of the motor one and the connecting shaft. The two pulley wheels are connected by a belt and form a transmission connection.

[0007] In a further embodiment, a motor two is installed at the shaft end of the ball screw. The shaft end of the motor two drives the ball screw to rotate through bevel gear meshing.

[0008] In a further embodiment, a magnetic powder storage box in the same plane as the grinding wheel is installed on the outer wall of the housing. The lower surface contour of the magnetic powder storage box fits the outer wall of the grinding wheel. The magnetic powder storage box stores magnetic powder coated with a colloidal substance inside.

[0009] In a further embodiment, a magnetic field sensor and a permanent magnet in the same plane as the grinding wheel are installed on the outer wall of the housing. The magnetic field sensor and the permanent magnet are on the same side of the grinding wheel. The magnetic field sensor, the permanent magnet, and the magnetic powder storage box are distributed on both sides of the grinding wheel.

[0010] In a further embodiment, the permanent magnet block is perpendicular to the tangent of the outer circle of the grinding wheel, and the detection surface of the magnetic field sensor is close to the outer wall of the grinding wheel.

[0011] In a further embodiment, a ball screw sliding assembly is used to form a sliding connection between the magnetic powder storage box and the housing.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the grooves on the surface of the grinding wheel are first filled by filling magnetic powder inside the grinding wheel, and then the grinding wheel in the filled state is polished. If the magnetic field sensor detects that there is still magnetic powder remaining on the surface of the grinding wheel, polishing continues. If there is no magnetic force after one rotation, it indicates that the grooves have been completely filled. In this way, it is possible to accurately determine whether there are still grooves on the surface of the grinding wheel. In this way, the depth of each polishing depends on the depth of the deepest pit on the surface of the grinding wheel. When facing different wear conditions, it is not necessary to feed a fixed value each time, which greatly reduces the number of times the grinding wheel is used and reduces the wear amount of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of an automatic truing device for a grinding wheel capable of detecting cracks.

[0014] Figure 2 It is a schematic diagram of the internal structure in side view of an automatic truing device for a grinding wheel capable of detecting cracks.

[0015] Figure 3 For the automatic truing device for a grinding wheel capable of detecting cracks Figure 2 It is a schematic diagram of the partial enlargement at A in the figure.

[0016] Figure 4 It is a schematic diagram of the external structure in side view of an automatic truing device for a grinding wheel capable of detecting cracks.

[0017] In the figure: 1. Housing; 2. Ball screw; 3. Base; 4. Motor 1; 5. Connecting shaft; 6. Motor 2; 7. Shaping roller; 8. Magnetic field sensor; 9. Permanent magnet block; 10. Magnetic powder storage box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1: Please refer to Figures 1-4, in the embodiment of the present invention, for an automatic grinder wheel dresser capable of detecting cracks, a slidable-up-and-down base 3 is arranged inside a housing 1. Threads are also provided inside the base 3 and a ball screw 2 is threadedly connected thereto. The rotation of the ball screw 2 drives the base 3 to move up and down. The front surface of the base 3 is bolted with a first motor 4 and a connecting shaft 5. And pulley wheels are connected to the sides of the first motor 4 and the connecting shaft 5 facing each other, and the two pulley wheels are connected by a belt. The end of the connecting shaft 5 away from the pulley wheel is connected with a dressing roller 7.

[0020] Bevel gears are arranged at the shaft ends of a second motor 6 and the ball screw 2, and the two groups of bevel gears are meshed with each other. When the second motor 6 rotates, the rotational kinetic energy can be transmitted through the meshing of this group of bevel gears, so as to drive the ball screw 2 to rotate by using the second motor 6, and finally drive the base 3 to slide up and down, thereby further adjusting the fitting degree between the dressing roller 7 and the grinding wheel, and making the controllability of the grinding depth.

[0021] Embodiment 2: Please refer to Figures 1-4 , different from Embodiment 1: A magnetic powder storage box 10 is installed on the front surface of the housing 1 and is in the same plane as the grinding wheel. And the arc structure on the lower surface of the magnetic powder storage box 10 is the same as the arc structure of the grinding wheel. The same arc shape can reduce the outward leakage of magnetic powder. At the same time, the magnetic powder storage box 10 stores magnetic powder smeared with glue, which is mainly smeared at the grooves of the grinding wheel for quickly filling the grooves.

[0022] The magnetic field sensor 8 and the permanent magnet block 9 are also on the same surface as the grinding wheel, but the magnetic field sensor 8 and the permanent magnet block 9 are on the other side of the grinding wheel, and the magnetic powder storage box 10 is not on the same side as the two. When rotating, taking any point on the surface of the grinding wheel as a mark P, the mark P needs to pass through the magnetic powder storage box 10 first, and then pass through the magnetic field sensor 8 and the permanent magnet block 9. The magnetic field sensor 8 then detects the strength of the magnetic force more accurately. When the magnetic force values at each position of the grinding wheel are the same, it means there are no extra grooves. Even if there is a small amount of magnetic powder attached to the surface of the grinding wheel without grooves, the magnetic force difference at each place on the surface of the grinding wheel should be very small. If the sudden increase in the magnetic force change at a certain place appears, it means the grooves still exist. And the function of the permanent magnet block 9 is to recycle the splashed magnetic powder, realizing the recycling of magnetic powder. At the same time, the permanent magnet block 9 is similar to a bowl-shaped structure and can effectively prevent the magnetic powder from falling.

[0023] The permanent magnet block 9 accepts the splashed magnetic powder with the largest receiving area, which can reduce the splashing distance of the magnetic powder and improve the collection efficiency of the magnetic powder. The detection surface of the magnetic field sensor 8 is close to the outer surface of the grinding wheel for close detection of the outer surface of the grinding wheel.

[0024] A ball screw sliding assembly is provided on the back of the magnetic powder storage box 10, which can slide up and down on the outer surface of the housing 1 to adjust the distance. A closing switch is also provided at the bottom of the magnetic powder storage box 10 to prevent the magnetic powder from flowing downward during grinding. At the same time, the sliding assembly can also avoid the damping problem caused by grinding the grinding wheel. To further improve the flow efficiency of the magnetic powder, an extrusion assembly, such as a hydraulic cylinder, etc., can be provided in the magnetic powder storage box 10 to extrude the magnetic powder downward, or an outer vibration assembly can be used, both of which can promote the downward flow of the magnetic powder and improve the efficiency of filling the magnetic powder into the pits.

[0025] The working principle of the present invention is as follows: The first motor 4 can drive the connecting shaft 5 through a belt and pulley structure, and the connecting shaft 5 then drives the shaping roller 7 to rotate. The shaping roller 7 can trim the outer wall of the grinding wheel to eliminate the surface pits. At the same time, the second motor 6 can be used to drive the ball screw 2 to rotate, thereby driving the base 3 to descend, making the shaping roller 7 closer to the surface of the grinding wheel, so as to adjust the position of the shaping roller 7 according to the different diameters of the grinding wheels and adapt to the trimming of different depths. To better trim the grinding wheel, the present invention also provides a magnetic powder storage box 10, which adheres the magnetic powder and colloid to the outer surface of the grinding wheel. Due to the limitation of the outer shell of the magnetic powder storage box 10, the magnetic powder adhering to the outermost side of the grinding wheel will be scraped off or splashed outward by the outer wall of the shaping roller 7. Only the magnetic powder remains in the pits of the grinding wheel. Therefore, after the magnetic field sensor 8 detects the magnetic powder, the shaping roller 7 is continuously lowered slowly to continue grinding the grinding wheel until the magnetic force of the magnetic powder cannot be detected on the surface of the grinding wheel.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks, characterized in that: It includes a housing (1), a base (3) is slidably connected to the inner side wall of the housing (1), a ball screw (2) is connected to the back surface of the base (3) through a threaded hole, a first motor (4) and a connecting shaft (5) are arranged on the front surface of the base (3), and a profiling roller (7) coplanar with the grinding wheel is connected to one end of the connecting shaft (5).

2. The automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks according to claim 1, wherein: Pulley wheels are arranged at the rotating ends of the first motor (4) and the connecting shaft (5), and the two pulley wheels are connected by a belt and form a transmission connection therebetween.

3. The automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks according to claim 1, wherein: A second motor (6) is installed at the shaft end of the ball screw (2), and the shaft end of the second motor (6) drives the ball screw (2) to rotate through bevel gear meshing.

4. The automatic dresser for grinding wheel of a grinding machine capable of detecting cracks according to claim 1, characterized in that: A magnetic powder storage box (10) coplanar with the grinding wheel is installed on the outer wall of the housing (1), the contour of the lower surface of the magnetic powder storage box (10) fits the outer wall of the grinding wheel, and magnetic powder coated with a colloid is stored inside the magnetic powder storage box (10).

5. The automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks according to claim 1, characterized in that: A magnetic field sensor (8) and a permanent magnet block (9) coplanar with the grinding wheel are installed on the outer wall of the housing (1), the magnetic field sensor (8) and the permanent magnet block (9) are on the same side of the grinding wheel, and the magnetic field sensor (8), the permanent magnet block (9) and the magnetic powder storage box (10) are distributed on both sides of the grinding wheel.

6. The automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks according to claim 5, wherein: The permanent magnet block (9) is tangent to the outer circle tangent of the grinding wheel, and the detection surface of the magnetic field sensor (8) is close to the outer wall of the grinding wheel.

7. An automatic dresser for a grinding wheel of a grinding machine capable of detecting cracks, characterized in that: A sliding connection is formed between the magnetic powder storage box (10) and the housing (1) by a ball screw (2) sliding assembly.

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