Workpiece grinding apparatus

Abstract

The present invention relates to a workpiece grinding device, and more specifically, comprises: a chuck portion installed so as to be movable along the front-rear direction and having the workpiece supported on its upper surface; a grinding portion installed rotatably on both sides of the workpiece and movable inward and outward directions relative to the chuck portion to grind the sides of the workpiece; a dressing portion installed spaced apart from the front or rear side of the chuck portion and movable together with the chuck portion along the front-rear direction to dress the grinding portion; a spraying portion disposed on both sides of the workpiece and movable inward and outward directions relative to the chuck portion to spray cooling water toward the contact area between the workpiece and the grinding portion or the contact area between the grinding portion and the dressing portion; and a main drive unit that provides a moving force to the spraying portion and controls the spraying portion to be positioned at a dressing position where it can spray cooling water toward the contact area between the grinding portion and the dressing portion during a dressing operation. It comprises a polishing position setting unit that is driven in conjunction with the main drive unit to guide the movement of the spray unit, and also limits the position so that the spray unit is positioned at a polishing position where it can spray cooling water toward the contact area between the workpiece and the polishing unit during a polishing operation. According to the present invention as described above, since the spraying unit can be controlled to be accurately positioned at the polishing position and the dressing position depending on the working condition, cooling water can be accurately sprayed into the contact area between the workpiece and the polishing unit during polishing operations, and cooling water can be accurately sprayed into the contact area between the polishing unit and the dressing unit during dressing operations, thereby improving polishing efficiency and dressing efficiency.

Description

Technology Field

[0001] The present invention relates to a workpiece polishing device, and more specifically, to a workpiece polishing device that controls the spraying part to be accurately positioned at the polishing position and the dressing position, respectively, according to the working conditions of the polishing and dressing operations, thereby ensuring that cooling water is accurately supplied to the contact area between the workpiece and the polishing part or the contact area between the polishing part and the dressing part. Background Technology

[0002] Generally, a polishing device for polishing the side of a workpiece may be configured to include a chuck for supporting the workpiece, a polishing wheel for polishing the side of the workpiece, and a dresser for maintaining the surface condition of the polishing wheel.

[0003] In such grinding devices, frictional heat is generated in the contact area between the workpiece and the grinding wheel during the grinding operation; therefore, it is necessary to properly supply cooling water to the contact area to ensure machining precision and machining efficiency.

[0004] In addition, since the grinding wheel may wear out or its surface condition may deteriorate due to repeated use, a dressing operation is performed to maintain the surface of the grinding wheel using a dresser. In this case as well, heat generation and the creation of wear particles occur in the contact area between the grinding wheel and the dresser, so a supply of cooling water to the contact area is required.

[0005] Meanwhile, as prior art, Korean Published Patent No. 2024-0158432 discloses a grinding machine that automatically controls the nozzle position according to the processing state. The aforementioned prior art is configured to supply cooling fluid toward the actual processing point or the grinding area in use by controlling the position of the cooling water nozzle in response to changes in the relative position of the grinding wheel and the workpiece during the grinding operation.

[0006] However, since grinding and dressing operations require different target areas for intensive cooling water supply, there is a technical need to appropriately change the spray position of the cooling water nozzle according to the operating conditions to correspond to each contact area.

[0007] That is, during grinding operations, cooling water needs to be accurately supplied to the contact area between the workpiece and the grinding wheel, and during dressing operations, cooling water needs to be accurately supplied to the contact area between the grinding wheel and the dresser.

[0008] For this reason, recently, a structure has been adopted in which a cooling water nozzle is installed at one end of a cantilever-shaped arm that is movable in a direction closer to or further away from the chuck on which the workpiece is placed, and a driving unit is connected to the other end of the arm, so that the cooling water nozzle is moved to a dressing position and a grinding position by moving the one end of the arm with the cooling water nozzle installed in a direction closer to or further away from the chuck.

[0009] However, in the case of the cantilever-type arm described above, the axial center of the arm may be eccentrically positioned during the process of moving in a direction closer to or further away from the chuck, and consequently, there is a problem in that the cooling water nozzle cannot accurately move to the dressing position and the grinding position.

[0010] As a result, there is a concern that cooling water may not be accurately supplied to the contact area between the workpiece and the grinding wheel during grinding operations, and that cooling water may not be accurately supplied to the contact area between the grinding wheel and the dresser during dressing operations.

[0011] In addition, in working environments where coolant is sprayed, the nozzle positioning mechanism that controls the position of the coolant nozzle may be continuously exposed to the coolant; therefore, there is also a need for a protective structure to prevent damage or malfunction caused by the ingress of coolant.

[0012] Therefore, a workpiece grinding device with a new structure is required that can accurately supply cooling water to each contact area by selectively changing the position of the cooling water nozzle according to the working conditions of the grinding and dressing operations, and also reduce the possibility of damage to the nozzle position adjustment mechanism caused by the cooling water. Prior art literature

[0013] Korean Published Patent No. 2024-0158432 (Grinding machine capable of automatic nozzle position control according to processing state, Nov. 05, 2024) The problem to be solved

[0014] The present invention has been devised to solve the above problems, and the objective of the present invention is to provide a workpiece grinding device capable of controlling the spraying part to move accurately to a grinding position and a dressing position according to the working condition so that cooling water is accurately sprayed into the contact area between the workpiece and the grinding wheel during grinding operations, and cooling water is accurately sprayed into the contact area between the grinding wheel and the dresser during dressing operations.

[0015] In addition, the present invention provides a workpiece grinding device capable of improving the durability and operational reliability of the device by suppressing damage or malfunction caused by the inflow of coolant to a drive-related component that controls the position of the spray part in a working environment where coolant is sprayed. means of solving the problem

[0016] According to the present invention for achieving the above objective, there is a chuck portion installed so as to be movable along the front-rear direction and having a workpiece supported on its upper surface; a polishing portion installed rotatably on both sides of the workpiece and movable inward and outward directions relative to the chuck portion to polish the side of the workpiece; a dressing portion installed spaced apart from the front or rear side of the chuck portion and movable together with the chuck portion along the front-rear direction to dress the polishing portion; a spraying portion disposed on both sides of the workpiece and movable inward and outward directions relative to the chuck portion to spray cooling water toward a contact area between the workpiece and the polishing portion or a contact area between the polishing portion and the dressing portion; and a main drive unit that provides a moving force to the spraying portion and controls the spraying portion to be positioned at a dressing position where it can spray cooling water toward the contact area between the polishing portion and the dressing portion during a dressing operation. A workpiece polishing device is provided, characterized by including a polishing position setting unit that is driven in conjunction with the main drive unit to guide the movement of the spray unit and, during a polishing operation, limits the position of the spray unit to a polishing position where it can spray cooling water toward the contact area between the workpiece and the polishing unit.

[0017] Here, the injection unit may include a hollow first body fixedly installed on each side of the workpiece, a first driving arm having one side installed to be movable inward or outward relative to the chuck inside the hollow of the first body, with the inner and outer ends exposed to the outside of the first body, and an injection nozzle installed on the inner end of the first driving arm.

[0018] And, the main drive unit may include a cylinder body positioned at the rear of the first body, a cylinder arm installed on the cylinder body so as to be movable inward and outward directions relative to the chuck, with the inner and outer ends exposed to the outside of the cylinder body, a stopper installed on the inner end of the cylinder arm to limit the movement of the injection unit to a dressing position when the injection unit is moved outward, and a connecting member connecting the outer end of the cylinder arm and the outer end of the first drive arm.

[0019] In addition, the stopper may be installed at the inner end of the cylinder arm so as to be movable in the inner and outer directions relative to the chuck, thereby allowing for variation of the dressing position that is restricted when the injection part is moved outward.

[0020] In addition, the grinding position setting unit may include a second body positioned at the rear of the cylinder body with an open outer end, and a second driving arm installed inside the second body so as to be movable inward and outward directions relative to the chuck, wherein the outer end is connected to the connecting member and driven in conjunction with the main driving unit to guide the movement of the injection unit, and the inner end is supported on the inner surface of the second body to restrict the movement of the injection unit to the grinding position.

[0021] In addition, the grinding position setting part may further include an adjustment bolt that penetrates the center of the second driving arm and is screw-coupled to the second driving arm, with an inner end protruding outside the inner end of the second driving arm and an outer end protruding outside the outer end of the second driving arm and having a head, and may be configured such that the protruding length of the inner end is changed as the screw-coupled position of the adjustment bolt is adjusted, thereby enabling variation of the grinding position that is limited when the injection part is moved inward.

[0022] Additionally, the apparatus further includes a shielding housing that surrounds the first body, the cylinder body, and the second body from the outside, and the shielding housing can prevent cooling water or foreign substances scattered during a grinding or dressing operation from entering the interior of the first body, the cylinder body, and the second body. Effects of the invention

[0023] According to the present invention as described above, since the spraying unit can be controlled to be accurately positioned at the polishing position and the dressing position depending on the working condition, cooling water can be accurately sprayed into the contact area between the workpiece and the polishing unit during polishing operations, and cooling water can be accurately sprayed into the contact area between the polishing unit and the dressing unit during dressing operations, thereby improving polishing efficiency and dressing efficiency.

[0024] In addition, the present invention can suppress the inflow of cooling water by controlling the position of the spray part even in a working environment where cooling water is sprayed, thereby improving the durability and operational reliability of the device. Brief explanation of the drawing

[0025] FIG. 1 is a plan view of a grinding device for a workpiece according to one embodiment of the present invention, FIG. 2 is a drawing for explaining the injection unit, main driving unit, and polishing position setting unit according to the present invention. FIGS. 3a to 3e are drawings for explaining the operation of a workpiece grinding device according to an embodiment of the present invention. FIG. 4 is a drawing for explaining a main drive unit according to another embodiment of the present invention, FIG. 5 is a drawing for explaining a polishing position setting unit according to another embodiment of the present invention, FIG. 6 is a drawing for explaining a grinding device for a workpiece according to another embodiment of the present invention. Specific details for implementing the invention

[0026] The embodiments described in the present invention and the configurations illustrated in the drawings are merely preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; therefore, the scope of the rights of the present invention should not be interpreted as being limited by the embodiments and drawings described in the text. That is, since the embodiments are subject to various modifications and may take various forms, the scope of the rights of the present invention should be understood to include equivalents capable of realizing the technical ideas.

[0027] In addition, this does not mean that the objectives or effects presented in the present invention must all be included in specific embodiments, or that only such effects must be included; therefore, the scope of the rights of the present invention should not be interpreted as being limited by this.

[0028] Unless otherwise defined, all terms used herein have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted in accordance with their meanings in the context of the relevant technology and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this invention.

[0029] Hereinafter, a grinding device for a workpiece according to an embodiment of the present invention will be described in detail with reference to the attached drawings. In the following description, “inner side” refers to the direction toward the chuck, and “outer side” refers to the direction away from the chuck.

[0030] FIG. 1 is a plan view of a workpiece polishing device according to one embodiment of the present invention, FIG. 2 is a drawing for explaining a spraying unit, a main driving unit, and a polishing position setting unit according to the present invention, and FIG. 3a to 3e are drawings for explaining the operation of a workpiece polishing device according to one embodiment of the present invention.

[0031] Referring to FIGS. 1 and 2, a workpiece grinding device (1) according to one embodiment of the present invention includes a chuck (10), a grinding unit (20), a dressing unit (30), a spraying unit (40), a main driving unit (50), and a grinding position setting unit (60). In this embodiment, the workpiece (W) is exemplified as an LM guide rail. However, the present invention is not limited thereto and can be applied to various linear members or metal members requiring precision grinding on both sides.

[0032] The chuck (10) is configured to support a workpiece (W) on its upper surface and is installed to be movable along the front-rear direction, and serves to move the workpiece (W) relative to the grinding part (20) in the front-rear direction, and a magnetic chuck may be used.

[0033] This chuck (10) prevents movement, lifting, or misalignment of the workpiece (W) during the grinding process by adsorbing and fixing the workpiece (W) by magnetic force. Accordingly, the workpiece (W), which is an LM guide rail, moves in the forward and backward directions while maintaining a stable state supported by the chuck (10). In addition, the application of a magnetic chuck makes it easy to mount and detach the workpiece (W), thereby shortening the work preparation time.

[0034] The grinding unit (20) is positioned on each side of the workpiece (W) and is rotatably installed, and is installed to be movable in the inner and outer directions relative to the chuck (10), and serves to grind both sides of the workpiece (W).

[0035] This grinding part (20) includes a rotating grinding wheel or grinding stone and, in conjunction with the forward and backward movement of the chuck part (10), grinds both sides of the workpiece (W) to a predetermined dimension and surface precision.

[0036] In particular, for a long member in the longitudinal direction such as an LM guide rail, the forward and backward movement of the chuck (10) and the rotation of the grinding part (20) are combined to enable uniform grinding of the entire side of the rail.

[0037] The dressing part (30) is positioned spaced apart from the front or rear side of the chuck part (10) and is installed to move together with the chuck part (10) along the front and rear directions. It is positioned at a position corresponding to the polishing part (20) during the dressing operation and serves to dress the polishing part (20). A cylindrical block-shaped dressing tool (31) may be used.

[0038] In this embodiment, for convenience of explanation, a case in which the dressing portion (30) is positioned at the rear of the chuck portion (10) is illustrated as an example.

[0039] This dressing part (30) is positioned so that a dressing tool (31) contacts the polishing part (20) at a position corresponding to the polishing part (20) during the dressing operation, thereby performing a dressing operation to maintain the shape and surface condition of the polishing part (20). Accordingly, even if the polishing part (20) wears out due to repeated use, the shape and polishing performance of the polishing part (20) can be properly maintained by the dressing part (30).

[0040] The spraying unit (40) is positioned on each side of the workpiece (W) and is installed to be movable inward and outward directions relative to the chuck (10). It serves to spray cooling water toward the contact area between the workpiece (W) and the polishing unit (20) or the contact area between the polishing unit (20) and the dressing unit (30), and includes a first body (41), a first driving arm (42), and a spray nozzle (43).

[0041] The first body (41) is fixedly installed on each side of the workpiece (W) and provides a hollow space inside in which the first driving arm (42) moves.

[0042] The first driving arm (42) is installed with one side inserted into the hollow of the first body (41), and is installed to be movable in the inner and outer directions relative to the chuck (10), with the inner and outer ends exposed to the outside of the first body (41).

[0043] The spray nozzle (43) is installed at the inner end of the first drive arm (42) and serves to spray cooling water. As the first drive arm (42) moves, the position of the cooling water spray changes. That is, when the position of the first drive arm (42) changes, the spray nozzle (43) also moves to a polishing position where cooling water can be sprayed toward the contact area between the workpiece (W) and the polishing part (20), or to a dressing position where cooling water can be sprayed toward the contact area between the polishing part (20) and the dressing part (30).

[0044] The main drive unit (50) provides a moving force to the spray unit (40) and controls the spray unit (40) to be positioned at a dressing location where it can spray cooling water toward the contact area between the polishing unit (20) and the dressing unit (30) during the dressing operation, and includes a cylinder body (51), a cylinder arm (52), a stopper (53), and a connecting member (54).

[0045] The cylinder body (51) is positioned at the rear of the first body (41) and provides a space for the cylinder arm (52) to move inside.

[0046] The cylinder arm (52) is installed on the cylinder body (51) so as to be movable in the inner and outer directions relative to the chuck (10), and the inner and outer ends are exposed to the outside of the cylinder body (51). The moving force of the cylinder arm (52) is transmitted to the first driving arm (42) through the connecting member (54) to induce a change in the position of the injection nozzle (43).

[0047] The connecting member (54) serves to connect the outer end of the cylinder arm (52) and the outer end of the first driving arm (42), and serves to transmit the movement force of the cylinder arm (52) to the first driving arm (42). Accordingly, when the cylinder arm (52) moves, the first driving arm (42) moves in conjunction, and the injection nozzle (43) also moves together.

[0048] The stopper (53) is installed on the inner end of the cylinder arm (52) and serves to restrict the injection nozzle (43) of the injection part (40) from moving to the dressing position when the injection part (40) is moved outward.

[0049] That is, when the cylinder arm (52) moves outward, the stopper (53) is supported by a support block (B) fixedly installed on the inner end of the cylinder body (51), thereby restricting the outward movement of the cylinder arm (52), and accordingly, the outward movement of the first driving arm (42) which moves in conjunction with the cylinder arm (52) is restricted, so that the spray nozzle (43) of the spraying unit (40) is positioned at a dressing position where it can spray cooling water toward the contact area between the polishing unit (20) and the dressing unit (30).

[0050] The polishing position setting unit (60) is driven in conjunction with the main drive unit (50) to guide the movement of the first drive arm (42) of the spray unit (40), and also serves to limit the position so that the spray nozzle (43) of the spray unit (40) is positioned at a polishing position where cooling water can be sprayed toward the contact area between the workpiece (W) and the polishing unit (20) during the polishing operation, and includes a second body (61) and a second drive arm (62).

[0051] The second body (61) is positioned at the rear of the cylinder body (51) and is formed with an open outer end, providing a space inside for the second driving arm (62) to move.

[0052] The second drive arm (62) is installed inside the second body (61) so as to be movable inward and outward directions relative to the chuck (10), and its outer end is connected to the connecting member (54) to be driven in conjunction with the main drive unit (50). That is, as the connecting member (54) moves due to the movement of the cylinder arm (52), the second drive arm (62) also moves together, thereby stably guiding the movement of the first drive arm (42).

[0053] When the second drive arm (62) moves inward, the inner end is supported on the inner surface of the second body (61), thereby restricting the movement inward, and accordingly, the movement of the first drive arm (42) inward is restricted, so that the spray nozzle (43) is positioned at a polishing position where it can spray cooling water toward the contact area between the workpiece (W) and the polishing part (20).

[0054] In particular, the polishing position setting part (60) stably guides the movement path of the spraying part (40) and performs movement restriction at the polishing position, so that eccentric movement of the first driving arm (42) is suppressed and the positional reproducibility of the spray nozzle (43) is improved.

[0056] Hereinafter, the operation of a workpiece polishing device (1) according to one embodiment of the present invention will be explained with reference to FIGS. 3a to 3e.

[0057] First, referring to FIG. 3a, the workpiece (W) is placed at a position corresponding to the grinding part (20) while being supported by the chuck part (10).

[0058] In this state, when the cylinder arm (52) of the main drive unit (50) is moved in the inner direction of the chuck (10), the first drive arm (42) and the second drive arm (62) move in tandem in the inner direction of the chuck (10) through the connecting member (54).

[0059] At this time, the second driving arm (62) moves inside the second body (61) and stably guides the movement of the first driving arm (42), and when it moves a certain distance inward and its inner end is supported on the inner surface of the second body (61), the movement of the first driving arm (42) inward is restricted.

[0060] Accordingly, the spray nozzle (43) of the spraying unit (40) is positioned at a polishing location where it can spray cooling water toward the contact area between the workpiece (W) and the polishing unit (20).

[0061] Referring to the following Fig. 3b, the grinding part (20) is positioned to move inward relative to the chuck part (10) and come into contact with the side of the workpiece (W).

[0062] In this state, the polishing unit (20) rotates to perform polishing work on the side of the workpiece (W), and the cooling water sprayed from the spray nozzle (43) is concentrated and supplied to the contact area between the workpiece (W) and the polishing unit (20) to reduce polishing heat and improve polishing quality.

[0063] In addition, the chuck (10) moves in the forward and backward directions while stably fixing the workpiece (W), thereby continuously performing a grinding operation along the length direction of the workpiece (W).

[0064] Referring to the following Fig. 3c, after the grinding operation is finished, the grinding part (20) moves outward relative to the chuck part (10) and is separated from the workpiece (W).

[0065] Accordingly, the polishing part (20) is placed at a dressing preparation position for a subsequent dressing operation.

[0066] Referring to the following Fig. 3d, when the cylinder arm (52) of the main drive unit (50) is moved outward from the chuck (10), the first drive arm (42) and the second drive arm (62) move in tandem outward from the chuck (10) through the connecting member (54).

[0067] At this time, when the cylinder arm (52) moves a certain distance outward and the stopper (53) is supported by a support block (B) fixedly installed on the inner side of the inner end of the cylinder body (51), the outward movement of the first driving arm (42) is restricted, and accordingly, the spray nozzle (43) of the spraying part (40) is positioned at a dressing position where it can spray cooling water toward the contact area between the polishing part (20) and the dressing part (30).

[0068] Referring to FIG. 3e, the chuck (10) is moved forward so that the dressing part (30) is positioned at a location corresponding to the polishing part (20), and then the polishing part (20) is moved inward relative to the chuck (10) so that the polishing part (20) is positioned to come into contact with the dressing tool (31) of the dressing part (30).

[0069] In this state, the polishing part (20) rotates and the dressing operation is performed, and the cooling water sprayed from the spray nozzle (43) is concentrated and supplied to the contact area between the polishing part (20) and the dressing part (30), thereby mitigating local heat rise during the dressing process and improving operational stability.

[0071] As described above, the workpiece polishing device (1) according to one embodiment of the present invention can accurately supply cooling water to the contact area between the workpiece (W), which is an LM guide rail, and the polishing part (20) during the polishing operation, and can accurately supply cooling water to the contact area between the polishing part (20) and the dressing part (30) during the dressing operation.

[0072] In addition, when the main drive unit (50) moves the spray unit (40), the polishing position setting unit (60) guides the movement of the spray unit (40), thereby suppressing eccentric movement of the spray unit (40) and allowing the polishing position and dressing position to be formed more accurately.

[0074] FIG. 4 is a drawing for explaining a main drive unit according to another embodiment of the present invention.

[0075] Referring to FIG. 4, the main drive unit (50) according to another embodiment of the present invention differs from the first embodiment of the present invention in that the stopper (53) is installed at the inner end of the cylinder arm (52) so as to be movable in the inner and outer directions of the cylinder arm (52), and other configurations are substantially the same as the first embodiment of the present invention, so a detailed description thereof is omitted.

[0076] As previously described, the stopper (53) is installed on the inner end of the cylinder arm (52), and when the cylinder arm (52) moves outward, the stopper (53) is supported by a support block (B) fixedly installed on the inner end of the cylinder body (51), thereby serving to restrict the outward movement of the cylinder arm (52).

[0077] At this time, in this embodiment, since the stopper (53) is installed at the inner end of the cylinder arm (52) so as to be movable in the inner and outer directions of the cylinder arm (52), the position where the outer direction movement of the cylinder arm (52) is restricted is changed by adjusting the position of the stopper (53), and accordingly, the position where the injection nozzle (43) of the injection unit (40) is placed at the dressing position is varied.

[0078] Additionally, a support nut (N) is installed on the inner side of the stopper (53). This support nut (N) is installed on the inner end of the cylinder arm (52) so as to be movable in the inner and outer directions of the cylinder arm (52), thereby allowing the stopper (53) to be stably supported on the inner end of the cylinder arm (52) and enabling position adjustment. That is, as the position of the support nut (N) is adjusted, the position of the stopper (53) is also adjusted, and as a result, the point at which the stopper (53) is supported by the support block (B) fixedly installed on the inner side of the inner end of the cylinder body (51) is changed, thereby changing the position limiting the movement of the cylinder arm (52) in the outer direction.

[0079] Accordingly, according to the present embodiment, by adjusting the position of the stopper (53) and the support nut (N), the spray nozzle (43) can spray cooling water toward the contact area between the polishing part (20) and the dressing part (30) during the dressing operation, and the dressing position can be appropriately set according to the working conditions.

[0081] FIG. 5 is a drawing for explaining a polishing position setting unit according to another embodiment of the present invention.

[0082] Referring to FIG. 5, the grinding position setting unit (60) according to another embodiment of the present invention differs in that an adjustment bolt (63) is additionally provided on the second driving arm (62), and other than that, the configuration is substantially the same as that of one embodiment of the present invention, so a detailed description thereof is omitted.

[0083] The adjustment bolt (63) is installed by penetrating the center of the second drive arm (62) and is screw-coupled to the second drive arm (62), with its inner end protruding outside the inner end of the second drive arm (62) and its outer end protruding outside the outer end of the second drive arm (62) to provide a head (63a).

[0084] Accordingly, the operator can change the screw connection position of the adjustment bolt (63) by rotating the head (63a), and as a result, the protruding length of the inner end of the adjustment bolt (63) is adjusted.

[0085] Meanwhile, as previously explained, the polishing position setting unit (60) is driven in conjunction with the driving of the main driving unit (50) to guide the movement of the spraying unit (40), and limits the position so that the spray nozzle (43) is positioned at a polishing position where it can spray cooling water toward the contact area between the workpiece (W) and the polishing unit (20) during the polishing operation.

[0086] In this embodiment, the adjustment bolt (63) is configured to adjust the polishing position so that the spray nozzle (43) accurately sprays cooling water toward the contact area between the workpiece (W) and the polishing part (20) even when the width of the workpiece (W) changes.

[0087] That is, when the width of the workpiece (W) changes, the lateral position of the workpiece (W) supported by the chuck (10) changes, and accordingly, the position of the contact area between the workpiece (W) and the grinding part (20) can also change in the inner and outer directions relative to the chuck (10).

[0088] In this case, by adjusting the protruding length of the inner end of the adjustment bolt (63), the grinding position that is restricted when the injection part (40) moves inward can be changed, and consequently, the injection nozzle (43) can be positioned to spray cooling water toward the changed contact area.

[0089] Specifically, as the injection unit (40) moves inward by the main drive unit (50), the second drive arm (62) moves inside the second body (61) and stably guides the movement of the injection unit (40). At this time, if the inner end of the adjustment bolt (63) is set to be supported first on the inner surface of the second body (61), the inward movement of the second drive arm (62) is restricted at a relatively early point, and accordingly, the inward movement of the first drive arm (42) is restricted, so that the injection nozzle (43) is positioned at a relatively outer grinding position.

[0090] Conversely, if the protruding length of the inner end of the adjustment bolt (63) is reduced, the second driving arm (62) moves further inward and is supported on the inner surface of the second body (61), so the injection nozzle (43) can be positioned at a more inner grinding position.

[0091] Accordingly, according to the present embodiment, even when the width of the workpiece (W) is changed by adjusting the protrusion length of the adjustment bolt (63), the polishing position where the spray nozzle (43) can spray cooling water toward the contact area between the workpiece (W) and the polishing part (20) during the polishing operation can be appropriately set according to the working conditions.

[0092] In addition, according to the present embodiment, even when the width of the workpiece (W) changes, the grinding position can be easily corrected by setting the adjustment bolt (63). Furthermore, by positioning the spray nozzle (43) to more accurately spray cooling water toward the contact area between the workpiece (W) and the grinding part (20), the stability of the grinding operation and the reproducibility of the grinding position can be improved.

[0094] FIG. 6 is a drawing for explaining a grinding device for a workpiece according to another embodiment of the present invention.

[0095] Referring to FIG. 6, the workpiece polishing device (1) according to another embodiment of the present invention differs from the first embodiment of the present invention only in that a shielding housing (70) is added, and the other configurations are identical to the first embodiment of the present invention, so a detailed description of the redundant configurations is omitted.

[0096] The shielding housing (70) is installed to surround the outer side of the drive components associated with the injection unit (40), the main drive unit (50), and the polishing position setting unit (60), and serves to prevent cooling water or foreign substances scattered during polishing or dressing operations from entering the interior of the drive components.

[0097] More specifically, the shielding housing (70) is installed to surround the first body (41), the cylinder body (51), and the second body (61) from the outside, thereby preventing cooling water or foreign substances from entering the interior of the first body (41), the cylinder body (51), and the second body (61).

[0098] Accordingly, according to the present embodiment, contamination, corrosion, or malfunction of the drive components caused by cooling water and foreign substances scattered during grinding or dressing operations can be prevented, and accordingly, the durability and operational reliability of the device are improved.

[0100] As described above, the present invention has been explained through limited embodiments and drawings, but those skilled in the art can make various modifications and variations from the description above. For example, the same or similar effects can be achieved even if the described process is performed in a different order, the described structure or components are combined or combined in a different form, or are replaced with other components or equivalents. Accordingly, such variations and equivalents should also be interpreted as being included in the claims set forth below. Explanation of the symbols

[0101] 1 : Workpiece grinding device 10 : Chuck 20 : Grinding section 30 : Dressing section 31 : Dressing tool 40 : Spray part 41: First body 42: First driving arm 43 : Spray nozzle 50 : Main drive unit 51: Cylinder body 52: Cylinder arm 53 : Stopper 54 : Connecting member 60 : Grinding position setting part 61 : Second body 62 : Second drive arm 63 : Adjustment bolt 63a : Head 70 : Shielding housing B : Support block N : Support nut W : Object to be processed

Claims

Claim 1 A chuck unit installed so as to be movable along the front-rear direction and supporting a workpiece on its upper surface; a polishing unit installed rotatably on both sides of the workpiece and movable inward and outward directions relative to the chuck unit to polish the sides of the workpiece; a dressing unit installed spaced apart from the front or rear side of the chuck unit and movable together with the chuck unit along the front-rear direction to dress the polishing unit; a spraying unit positioned on both sides of the workpiece and movable inward and outward directions relative to the chuck unit to spray cooling water toward the contact area between the workpiece and the polishing unit or the contact area between the polishing unit and the dressing unit; a main drive unit that provides movable force to the spraying unit and controls the spraying unit to be positioned at a dressing location where cooling water can be sprayed toward the contact area between the polishing unit and the dressing unit during the dressing operation. and includes a polishing position setting unit that is driven in conjunction with the main drive unit to guide the movement of the spray unit and, during a polishing operation, limits the position of the spray unit to a polishing position where cooling water can be sprayed toward the contact area between the workpiece and the polishing unit, wherein the spray unit comprises: a hollow first body fixedly installed on each side of the workpiece; and a first drive arm, one side of which is installed to be movable inward and outward directions relative to the chuck unit within the hollow of the first body, and the inner and outer ends of which are exposed to the outside of the first body. A grinding device for a workpiece, comprising a spray nozzle installed at the inner end of the first driving arm, wherein the main driving unit comprises a cylinder body disposed at the rear of the first body, a cylinder arm installed on the cylinder body so as to be movable inward and outward directions relative to the chuck, with the inner and outer ends exposed to the outside of the cylinder body, a stopper installed at the inner end of the cylinder arm to restrict the spray unit from moving to a dressing position when the spray unit is moved outward, and a connecting member connecting the outer end of the cylinder arm and the outer end of the first driving arm. Claim 2 delete Claim 3 delete Claim 4 A grinding device for a workpiece according to claim 1, characterized in that the stopper is installed at the inner end of the cylinder arm so as to be movable in an inner or outer direction relative to the chuck, and is configured to allow for variation of the dressing position that is restricted when the injection part is moved outward. Claim 5 A grinding device for a workpiece according to claim 1, wherein the grinding position setting part comprises a second body disposed at the rear of the cylinder body and having an open outer end, and a second driving arm installed inside the second body so as to be movable in an inner or outer direction relative to the chuck part, the outer end of which is connected to the connecting member and driven in conjunction with the main driving part to guide the movement of the spray part, and the inner end of which is supported on the inner surface of the second body to limit the movement of the spray part to the grinding position. Claim 6 A grinding device for a workpiece according to claim 5, wherein the grinding position setting part further includes an adjustment bolt that penetrates the center of the second driving arm and is screw-coupled to the second driving arm, the inner end of which protrudes outside the inner end of the second driving arm, and the outer end of which protrudes outside the outer end of the second driving arm and is provided with a head, and wherein the protruding length of the inner end is changed as the screw-coupled position of the adjustment bolt is adjusted, thereby enabling variable grinding position that is limited when the spraying part is moved inward. Claim 7 A grinding device for a workpiece according to either claim 5 or 6, further comprising a shielding housing that surrounds the first body, the cylinder body, and the second body from the outside, wherein the shielding housing prevents cooling water or foreign substances scattered during grinding or dressing operations from entering the interior of the first body, the cylinder body, and the second body.

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