Apparatus for simultaneous grinding grinding

Abstract

The present invention relates to a simultaneous grinding device, specifically comprising a grinding means for grinding the outer surface of an object, a first mounting means provided on one side of the grinding means for mounting a first object, a second mounting means provided on the other side of the grinding means for mounting a second object, and a transfer means provided on one side of the first mounting means and the second mounting means for moving the first mounting means and the second mounting means back and forth relative to the grinding means, wherein the first mounting means and the second mounting means are characterized by having rotation axes parallel to each other. According to the simultaneous grinding device (1) of one embodiment of the present invention, productivity is improved by simultaneously grinding two objects by one grinding stone, and multiple objects can be precisely processed by individually adjusting the distance between the objects and the grinding stone, and a difference in grinding amount caused by clogging of the grinding means is prevented.

Description

Technology Field

[0001] The present invention relates to a simultaneous grinding device, and more specifically, to a simultaneous grinding device in which productivity is improved by simultaneously grinding two objects by a single grinding stone, multiple objects can be precisely processed by individually adjusting the distance between the objects and the grinding stone, and differences in grinding amount caused by clogging of the grinding means are prevented. Background Technology

[0002] Bearings are manufactured by pressing one side of a disc-shaped workpiece against a rotating grinder and grinding it to the desired width and thickness. Typically, when machining bearings, a single workpiece is manufactured using a single fixture and grinder, which has the disadvantage of long working times and low productivity.

[0003] In order to solve these problems, Korean registered patent No. 10-1537074 discloses a bearing processing device having a plurality of processing units capable of processing two objects simultaneously, wherein a rotating unit is provided to transmit rotational force to a first grinding processing unit and a second grinding processing unit through a power transmission unit.

[0004] However, conventional technology requires a separate configuration to transmit rotational force generated from a single power source to multiple grinding sections, and since it is difficult to transmit uniform rotational force to each grinding section, there was a problem in that errors occurred in the dimensions of the workpieces processed in each grinding section. To solve the above problems, the inventors arrived at the present invention with the support of the Ministry of SMEs and Startups and Gyeongsangnam-do's "Gyeongnam Regional Enterprise Growth Ladder Support Project." Prior art literature

[0005] Republic of Korea Registered Patent No. 10-1537074 The problem to be solved

[0006] The objective of the present invention is to provide a simultaneous grinding device equipped with a first mounting means and a second mounting means, capable of simultaneously grinding the outer surfaces of two objects with a single grinding stone.

[0007] Another objective of the present invention is to provide a simultaneous grinding device equipped with a first sensing unit, a second sensing unit, a first conveying unit, and a second conveying unit, capable of adjusting the distance between each object and a grinding stone.

[0008] Another objective of the present invention is to provide a simultaneous grinding device in which a cooling water spraying means is provided between a first mounting means and a second mounting means, thereby preventing a difference in the grinding amount of two objects caused by the filling of the grinding means. means of solving the problem

[0009] To achieve the above objective, a simultaneous grinding device according to a preferred embodiment of the present invention comprises a grinding means for grinding the outer surface of an object, a first mounting means provided on one side of the grinding means and on which a first object is mounted, a second mounting means provided on the other side of the grinding means and on which a second object is mounted, and a transfer means provided on one side of the first mounting means and the second mounting means and on which the first mounting means and the second mounting means are transferred back and forth relative to the grinding means, wherein the first mounting means and the second mounting means are characterized by having rotation axes that are parallel to each other.

[0010] Herein, the invention is characterized by further including a first loading means provided on one side of the first mounting means for loading or unloading a first object to the first mounting means, and a second loading means provided on one side of the second mounting means for loading or unloading a second object to the second mounting means.

[0011] In addition, one side of the first loading means is provided with a first sensing unit for detecting the amount of grinding of the first object, and one side of the second loading means is provided with a second sensing unit for detecting the amount of grinding of the second object.

[0012] Furthermore, the above-mentioned transfer means is characterized by comprising a first transfer unit provided on one side of the first mounting means and transferring the first mounting means, a second transfer unit provided on one side of the second mounting means and transferring the second mounting means, and a third transfer unit provided on one side of the first transfer unit and the second transfer unit and transferring the first transfer unit and the second transfer unit.

[0013] In addition, the apparatus is characterized by further comprising a cooling water spraying means between the first mounting means and the second mounting means for spraying cooling water onto the polishing means to remove chips between the pores. Effects of the invention

[0014] A simultaneous grinding device according to a preferred embodiment of the present invention is equipped with a first mounting means and a second mounting means. Accordingly, productivity is improved by simultaneously grinding two objects by a single grinding wheel.

[0015] In addition, a simultaneous grinding device according to a preferred embodiment of the present invention is equipped with a first sensing unit, a second sensing unit, a first conveying unit, and a second conveying unit. Accordingly, the amount of grinding of an object is detected by the first sensing unit and the second sensing unit, and the movement of the first conveying unit and the second conveying unit is controlled respectively to individually adjust the distance between each object and the grinding wheel, thereby enabling precise processing of multiple objects.

[0016] Furthermore, in a preferred embodiment of the present invention, a simultaneous grinding device is provided with a cooling water spraying means between a first mounting means and a second mounting means. Accordingly, after grinding an object mounted on the first mounting means, chips trapped between the pores of the grinding stone are removed to prevent clogging of the grinding stone, thereby grinding the object mounted on the first mounting means and the object mounted on the second mounting means by the same amount. Brief explanation of the drawing

[0017] FIG. 1 is a front view schematically showing a simultaneous grinding device according to an embodiment of the present invention. FIG. 2 is a schematic plan view of a simultaneous grinding device according to an embodiment of the present invention. Specific details for implementing the invention

[0018] A preferred embodiment of the present invention will be described below with reference to the attached FIGS. 1 and FIGS. 2.

[0020] FIG. 1 is a schematic front view of a simultaneous grinding device (1) according to an embodiment of the present invention, and FIG. 2 is a schematic plan view of a simultaneous grinding device (1) according to an embodiment of the present invention.

[0022] As shown in FIGS. 1 and 2, a simultaneous grinding device (1) according to an embodiment of the present invention comprises a grinding means (100) for grinding the outer surface of an object, a first mounting means (210) provided on one side of the grinding means (100) for mounting a first object, a second mounting means (220) provided on the other side of the grinding means (100) for mounting a second object, and a transfer means (400) provided on one side of the first mounting means (210) and the second mounting means (220) for moving the first mounting means (210) and the second mounting means (220) back and forth relative to the grinding means (100), wherein the first mounting means (210) and the second mounting means (220) are characterized by having rotation axes that are parallel to each other.

[0023] The simultaneous grinding device (1) according to the present invention comprises a grinding means (100), a plurality of mounting means (210, 220) and a conveying means (400), etc.

[0024] A grinding means (100) grinds an object and is provided on one side (left side in FIG. 1) of a workbench (10) where processing takes place. The grinding means (100) consists of a grinding stone (110) that grinds the outer surface of the object in close contact with the object and a grinding stone motor (120) that provides rotational force to the grinding stone (110). Although the grinding means (100) may be moved toward the object, in the present invention, it is preferable to be fixedly installed on one side of the workbench (10).

[0025] A plurality of mounting means (210, 220) are provided on one side of the polishing means (100). Specifically, a first mounting means (210) for mounting a first object is provided on one side of the polishing means (100) (right side in FIG. 1, lower right side in FIG. 2), and a second mounting means (220) for mounting a second object is provided on the other side (upper right side in FIG. 2). Here, the first mounting means (210) is composed of a first spindle (212) on which the first object is mounted and supported, and a first spindle motor (214) that provides rotational force to the first spindle (212), and the second mounting means (220) is composed of a second spindle (222) on which the second object is mounted, and a second spindle motor (224) that provides rotational force to the second spindle (222). The first mounting means (210) and the second mounting means (220) are installed on one side (right side in FIG. 1 and FIG. 2) of the work table (10) such that the rotation axes of the first mounting means (210) and the second mounting means (220) are parallel to each other. At this time, the first mounting means (210) and the second mounting means (220) may be installed such that their rotation axes are horizontal to the ground and the second mounting means (210) and the second mounting means (220) are stacked vertically, but in the present invention, it is most preferable that the rotation axes of the first mounting means (210) and the second mounting means (220) are installed such that they are perpendicular to the ground and the first mounting means (210) and the second mounting means (220) are installed side by side in the front-back direction (up-down direction in FIG. 2). The first mounting means (210) and the second mounting means (220) are transported back and forth with respect to the grinding means (100) by the transport means (400) to be described later, and as a result, the gap between the grinding stone (110) and the object is individually adjusted.

[0026] As shown in FIG. 1, the simultaneous grinding device (1) according to the present invention is characterized by further including a first loading means (310) provided on one side of the first mounting means (210) for loading or unloading a first object onto the first mounting means (210), and a second loading means (320) provided on one side of the second mounting means (220) for loading or unloading a second object onto the second mounting means (220). Here, a first sensing unit (312) for detecting the amount of grinding of the first object is provided on one side of the first loading means (310), and a second sensing unit (322) for detecting the amount of grinding of the second object is provided on one side of the second loading means (320).

[0027] On one side of the first mounting means (210) and the second mounting means (220), a first loading means (310) and a second loading means (320) for loading or unloading a workpiece are provided, respectively. The first loading means (310) and the second loading means (320) are installed on a frame (12) provided on one side (right side in FIG. 1) of the work table (10). The first loading means (310) and the second loading means (320) extend from the frame (12) to the upper side of the first mounting means (210) and the second mounting means (220). One end (right side in FIG. 1) of the first loading means (310) and the second loading means (320) is rotatably fixed to the frame (12). When unloading the processed object from the first spindle (212) and the second spindle (222) to the outside, one end of the first loading means (310) is fixed to the frame (12) and rotates in one direction (counterclockwise in FIG. 2), and one end of the second loading means (320) is fixed to the frame (12) and rotates in the other direction (clockwise in FIG. 2). That is, the first loading means (310) and the second loading means (320) each rotate to the outside direction of the work table (10) to unload the processed object to the outside of the work table (10). In contrast, when the first object and the second object are loaded onto the first spindle (212) and the second spindle (222), respectively, the first loading means (310) grasps the first object and rotates in a different direction (clockwise in FIG. 2) around one end (right side in FIG. 2) fixed to the frame (12), and the second loading means (3230) grasps the second object and rotates in one direction (counterclockwise in FIG. 2) around one end (right side in FIG. 2) fixed to the frame (12). That is, the first loading means (310) and the second loading means (320) each rotate from the outside to the inside of the workbench (10) to load the object to be processed onto the first spindle (212) and the second spindle (222).

[0028] At one end (left side in FIG. 1 and FIG. 2) of the first loading means (310) and the second loading means (320), a first sensing unit (312) and a second sensing unit (322) are respectively provided. The first sensing unit (312) and the second sensing unit (322) each detect the amount of grinding of the first object and the second object. Depending on the amount of grinding detected by the first sensing unit (312) and the second sensing unit (322), the first mounting means (210) and the second mounting means (2) are transported back and forth (left and right directions in FIG. 1 and FIG. 2) relative to the grinding means (100) by the transport means (400) to be described later.

[0029] As shown in FIG. 1, the transfer means (400) is characterized by including a first transfer unit (420) provided on one side of the first mounting means (210) and transferring the first mounting means (210), a second transfer unit (430) provided on one side of the second mounting means (220) and transferring the second mounting means (220), and a third transfer unit (410) provided on one side of the first transfer unit (420) and the second transfer unit (430) and transferring the first transfer unit (420) and the second transfer unit (430).

[0030] As described above, the above-described transfer means (400) is configured to move the first mounting means (210) and the second mounting means (220) forward and backward (left and right directions in FIG. 1 and FIG. 2) relative to the grinding means (100), and the distance between the object and the grinding stone (110) is adjusted according to the movement of the transfer means (400). The above-described transfer means (400) is composed of a first transfer unit (420), a second transfer unit (430), and a third transfer unit (410), etc. Specifically, the first transfer unit (420) is provided on the lower side of the first mounting means (210) to transfer the first mounting means (210), and the second transfer unit (430) is provided on the lower side of the second mounting means (220) to transfer the second mounting means (220). The third transfer unit (410) is provided below the first transfer unit (420) and the second transfer unit (430), and by transferring the first transfer unit (420) and the second transfer unit (430) in one direction simultaneously, the first mounting means (210) and the second mounting means (220) are transferred in one direction simultaneously. The first transfer unit (420), the second transfer unit (430), and the third transfer unit (410) of the transfer means (400) may be composed of a rail, an LM guide, a cylinder, etc., but are not limited thereto.

[0031] The first conveying unit (420) and the second conveying unit (230) each have their conveying distance and direction adjusted by the amount of grinding of the first object and the second object detected by the first sensing unit (312) and the second sensing unit (322). For example, at the beginning of the grinding process, the third conveying unit (410) moves in a direction that approaches the grinding means (100) (left side in FIG. 1 and FIG. 2), and both the first mounting means (210) and the second mounting means (220) move the same distance in the direction of the grinding means (100). While grinding continues, the first sensing unit (312) and the second sensing unit (322) detect the amount of grinding of the first object and the second object in real time. When the amount of grinding of the first object detected by the first detection unit (312) is less than a predetermined target value, only the first mounting means (210) is moved to the grinding means (100) side (left side in FIG. 1) through the first transfer unit (420), and when the amount of grinding of the second object detected by the second detection unit (322) is less than a predetermined target value, only the second mounting means (220) is moved to the grinding means (100) side (left side in FIG. 1) through the second transfer unit (430). As a result, the first object and the second object mounted on the first mounting means (210) and the second mounting means (220) can be uniformly and precisely ground.

[0032] As shown in FIG. 2, the first mounting means (210) and the second mounting means (220) are further provided with a cooling water spraying means (500) that sprays cooling water onto the polishing means (100) to remove chips between the pores.

[0033] Between the first mounting means (210) and the second mounting means (220), a cooling water spraying means (500) for spraying cooling water onto the grinding stone (110) of the grinding means (100) is provided. The cooling water spraying means (500) is configured to include a spray pipe (510) having a flow path formed for transferring cooling water from an external cooling water tank (tank, not shown) and a spray nozzle (520) through which the cooling water transferred through the spray pipe (510) is sprayed. By spraying cooling water between the first mounting means (210) and the second mounting means (220) by the cooling water spraying means (500), chips stuck in the pores of the grinding stone (110) after grinding the first object are removed. As a result, the abrasive particles of the grinding stone (110) are maintained even after grinding the first object, so that the first object and the second object are uniformly ground. The installation position of the spray nozzle (520) and the spray pipe (510) is not particularly limited, provided that the spray nozzle (520) is positioned between the first mounting means (210) and the second mounting means (220) so that the cooling water spraying means (500) sprays cooling water onto the surface of the grinding stone (110) that has passed the first object mounted on the first spindle (212) and then passes the second object mounted on the second spindle (222). For example, the spray nozzle (520) may be installed between the first spindle (212) and the second spindle (222) and transported together with the first mounting means (210) and the second casting means (220) as the transport means (400) moves, and may be fixedly installed on the workbench (10). As shown in FIGS. 1 and 2, one end of the spray pipe (510) may be fixedly installed on the frame (12), and the spray nozzle (520) may be provided at the other end of the spray pipe (510) which is extended toward the grinding stone (110) side (left side in FIGS. 1 and 2). Here, it is preferable that the pressure of the cooling water sprayed through the spray nozzle (520) be 10 bar to 20 bar.If the spray pressure of the above cooling water is lower than 10 bar, chips stuck in the grinding stone (110) may not be removed, and if it is higher than 20 bar, the grinding surface of the grinding stone (110) may be damaged.

[0035] Hereinafter, a series of processes in which the outer surface of the inner ring of a bearing is ground by the simultaneous grinding device (1) according to a preferred embodiment of the present invention is described through each configuration of the simultaneous grinding device (1). In addition, the operation of the simultaneous grinding device (1) according to a preferred embodiment of the present invention is described.

[0037] First, a first mounting means (210) and a second mounting means (220) are aligned on one side (right side in FIG. 1) of the workbench (10). The first loading means (310) grasps a first object from the outside of the workbench (10) and rotates clockwise to load it onto the first spindle (212) of the first mounting means (210) aligned on the right side of the workbench (10). Likewise, the second loading means (320) grasps a second object from the outside of the workbench (10) and rotates counterclockwise to load it onto the second spindle (222) of the second mounting means aligned on the right side of the workbench (10). In this way, the first loading means (310) and the second loading means (320) rotate in opposite directions to load the workpiece onto the first spindle (212) and the second spindle (222), respectively, so that they do not interfere with each other.

[0038] Next, the first mounting means (210) and the second mounting means (220) are transported toward the grinding means (100) side (left side in FIG. 1) until the first object and the second object come into contact with the grinding stone (110) by the third transport unit (410). When the first object and the second object come into contact with the grinding stone (110), the grinding stone (110) is rotated by the grinding stone motor (120), the first object is rotated by the first spindle motor (214), and the second object is rotated by the second spindle motor (224). At this time, it is preferable that the first spindle (212) and the second spindle (222) rotate in the opposite direction to the rotation direction of the grinding stone (110). That is, when the grinding stone (110) is rotated clockwise, the first spindle (212) and the second spindle (222) are rotated counterclockwise, and when the grinding stone (110) is rotated counterclockwise, the first spindle (212) and the second spindle (222) are rotated clockwise. This is intended to maximize the frictional force between the object and the grinding stone (110) so that grinding can be performed smoothly. If the first spindle (212) and the second spindle (222) and the grinding stone (110) rotate in the same direction, the frictional force between the grinding stone (110) and the object is reduced, and efficient grinding is not performed.

[0039] When grinding by the grinding stone (110) begins, cooling water is sprayed from the cooling water spraying means (500). Specifically, cooling water transported through the flow path of the spray pipe (510) is sprayed onto the grinding stone (110) through the spray nozzle (520) provided between the first mounting means (210) and the second mounting means (220). As a result, chips stuck in the pores of the grinding stone (110) that has passed the first object are removed and cleaned, thereby maintaining the abrasive particles of the grinding stone (110) uniformly. Therefore, the first object and the second object can be ground uniformly.

[0040] While the objects are being ground, the amount of grinding of the first object and the second object is detected by the first sensing unit (312) and the second sensing unit (322). Here, if the amount of grinding of the first object or the second object is less than a predetermined target amount, the first mounting means (210) or the second mounting means (220) is moved to the grinding stone (110) side (left side in FIG. 1) by the first transfer unit (420) or the second transfer unit (430). In addition, even if the amount of grinding of the first object and the second object is not constant due to wear or eccentricity of the grinding stone (110), the mounting means (210, 220) with the object having less grinding amount can be transferred to the grinding means (100). In addition, when one of the two objects is ground to a predetermined target value, the mounting means (210, 220) on which the object is mounted is moved to the opposite side (right side in FIG. 1) of the grinding means (100) to prevent grinding beyond the target value. As a result, the two objects are ground uniformly while processing two objects with a single grinding stone (110), thereby improving the quality of the product.

[0041] When both the first object and the second object are polished to the target value, both the first mounting means (210) and the second mounting means (220) are transferred to the opposite side (right side in FIG. 1) of the polishing means (100) through the third transfer unit (410) and aligned to the right side of the work table (10).

[0042] Subsequently, the first object and the second object are each grasped by the first loading means (310) and the second loading means (320). The first loading means (310) rotates counterclockwise to unload the first object to the outside of the workbench (10), and the second loading means (320) rotates clockwise to unload the second object to the outside of the workbench (10).

[0043] The first loading means (310) and the second loading means (320), which are rotated outward from the work table (10), grasp the object again and then rotate inward from the work table (10) to load a new object onto the first spindle (212) and the second spindle (222).

[0045] Thus, according to the simultaneous grinding device (1) of one embodiment of the present invention, productivity is improved by simultaneously grinding two objects by one grinding stone, and multiple objects can be precisely processed by individually adjusting the distance between the objects and the grinding stone, and a difference in grinding amount caused by clogging of the grinding means is prevented.

[0047] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0049] 1 : Simultaneous grinding device 10 : Workbench 12 : Frame 100 : Grinding means 110 : Grinding stone 120 : Grinding stone motor 210: First mounting means 212: First spindle 214: First spindle motor 220: Second mounting means 222 : 2nd spindle 224 : 2nd spindle motor 310: First loading means 312: First sensing unit 320: Second loading means 322: Second sensing unit 400: Transfer means 410: Third transfer unit 420 : 1st Transfer Unit 430 : 2nd Transfer Unit 500: Coolant injection means 510: Injection pipe 520 : Spray nozzle

Claims

Claim 1 A grinding means for grinding the outer surface of an object; a first mounting means provided on one side of the grinding means and on which a first object is mounted; a second mounting means provided on the other side of the grinding means such that the rotational axis is parallel to that of the first mounting means and on which a second object is mounted; a transfer means provided on one side of the first mounting means and the second mounting means and for moving the first mounting means and the second mounting means back and forth relative to the grinding means; a first loading means provided on one side of the first mounting means and for loading or unloading a first object to the first mounting means, and having a first sensing unit on one side for detecting the amount of grinding of the first object; a second loading means provided on one side of the second mounting means and for loading or unloading a second object to the second mounting means, and having a second sensing unit on one side for detecting the amount of grinding of the second object. and a workbench on which the grinding means, the first mounting means, the second mounting means, the transfer means, the first loading means, and the second loading means are installed; wherein the first loading means and the second loading means have one end rotatably fixed and rotate from the outside to the inside of the workbench to load an object to be processed, and rotate from the outside to the outside of the workbench to unload an object to be processed to the outside of the workbench, while the transfer means comprises: a first transfer unit provided on one side of the first mounting means and transferring the first mounting means; and a second transfer unit provided on one side of the second mounting means and transferring the second mounting means. A simultaneous grinding device comprising: a first transfer unit and a second transfer unit provided on one side of the first transfer unit and the second transfer unit and transferring the first transfer unit and the second transfer unit; wherein, at the beginning of processing, both the first mounting means and the second mounting means are moved by the third transfer unit by the same distance in the direction of the grinding means, and during grinding, the first mounting means or the second mounting means can be moved toward the grinding means by the first transfer unit or the second transfer unit according to the amount of grinding of the first object and the second object detected through the first sensing unit and the second sensing unit. Claim 2 A simultaneous grinding device according to claim 1, characterized in that a cooling water spraying means is further provided between the first mounting means and the second mounting means to spray cooling water onto the grinding means to remove chips between the pores. Claim 3 delete Claim 4 delete Claim 5 delete

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