Grinding machine and machining method of guide mechanism of grinding machine

Abstract

The invention provides a grinding machine, which can realize a guide mechanism with higher continuity while suppressing vibration. A sheet (130) is fixed to a member (105) to be guided in a guide mechanism of a table (103), a groove (141) is provided in the sheet (130), and the member (105) to be guided is in surface contact with a guide member, thereby suppressing minute vibration in the guide mechanism. Furthermore, the lubricating oil supplied from the oil supply port (142) is efficiently supplied to the sheet (130) through the groove portion (141) of the sheet (130), thereby suppressing deterioration caused by wear of the sheet (130) and suppressing performance degradation of the guide mechanism.

Description

Technical Field

[0001] The present invention relates to a grinding machine for grinding workpieces, and in particular to a grinding machine with an improved sliding surface. Background Art

[0002] Conventionally, grinding machines have used ball guides and hollow roller guides, suitable for high-speed movement, as guide mechanisms for the table supporting the workpiece being ground. Furthermore, in the guide mechanisms for the table of machine tools, such as grinding machines, it is known to employ sliding guides made of fluororesin for the sliding portion.

[0003] For example, Patent Document 1 discloses a sheet-like sliding member having a polytetrafluoroethylene resin (hereinafter abbreviated as PTFE) as a main component and used in combination with lubricating oil, and discloses a structure that is as easy to manufacture as possible.

[0004] The sliding component disclosed in Patent Document 1 is a sliding component for a machine tool guide structure. It comprises a guiding surface that guides a workpiece support in a predetermined direction, a guided surface that is guided by sliding contact with the guiding surface, and lubricating oil retained between the guiding and guided surfaces. The sliding component forms either the guiding or guided surface of the guide structure. Furthermore, the sliding component is constructed from a sheet-like substrate primarily composed of PTFE. Both surfaces of the sheet-like substrate are chemically treated to enhance adhesion. The lubricating oil retaining surface of the sheet-like substrate is provided with multiple protrusions, the tops of which are polished to provide multiple sliding surfaces for sliding contact.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-23180 Summary of the Invention

[0008] (1) Technical issues to be resolved

[0009] When ball guides or hollow roller guides are used in the guide mechanism of a grinding machine's worktable, these guides form point contact with the guide components and the object being guided. Consequently, gaps between the balls and the hollow rollers cause minute vibrations on the worktable as it moves. Furthermore, this vibration can lead to uneven grinding on the surface of the workpiece being ground.

[0010] On the other hand, as an example of a low-load guide mechanism that does not use ball guides or hollow roller guides, a sliding guide has been proposed for a grinding machine table guide mechanism, employing a fluororesin material as the sliding member. However, this method presents a technical problem: wear degrades the fluororesin material, resulting in an increase in sliding resistance and reduced performance of the guide mechanism.

[0011] The present invention has been disclosed to solve the above-mentioned technical problems, and an object thereof is to provide a grinding machine and a method for machining a guide mechanism of a grinding machine in which vibration is suppressed and performance degradation of the guide mechanism is less likely to occur.

[0012] (2) Technical solution

[0013] The grinding machine disclosed in the present invention has a guide mechanism, which is based on guiding the worktable to slide in a specified direction along a rail-shaped guide component, and the worktable supports a workpiece as a grinding object. The grinding machine includes: a rail-shaped guided component, which is fixed to the lower part of the worktable and can slide along the guide component and is shorter than the guide component; and a sheet made of fluororesin, which is fixed to the guided component to form a sliding surface, the guided component has an inclination in the short side direction, and the sheet is fixed corresponding to the inclination of the guided component, so that the entire sheet is inclined, a groove is provided on the sliding surface, and an oil supply port is provided in the groove.

[0014] (3) Beneficial effects

[0015] Thus, according to the disclosure of the present invention, the sheet material fixed to the guided member is in surface contact with the guide member supporting it. This makes it less likely that gaps will form in the guide mechanism, compared to the case of using ball guides or hollow roller guides that are in point contact with the guide member, and can suppress the slight vibration caused by the gaps.

[0016] Furthermore, lubricating oil supplied from the oil supply port can be supplied to the sheet material via the grooves in the sheet material. Lubricating oil supplied from the oil supply port in the inclined sheet material moves due to gravity. Therefore, if the grooves are appropriately arranged in the sheet material, the lubricating oil can be easily distributed throughout the grooves, more efficiently supplying the lubricating oil to the sheet material, suppressing degradation of the sheet material due to wear, and thus preventing degradation of the guide mechanism's performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side view of the grinding machine according to the first embodiment of the present invention.

[0018] Figure 2 It is an explanatory diagram of the sliding state of the table of the grinding machine according to the first embodiment of the present invention.

[0019] Figure 3It is a bottom view of the table to which the guided member is fixed in the grinding machine according to the first embodiment of the present invention.

[0020] Figure 4 It is an enlarged side view of the table and the guided member of the grinding machine according to the first embodiment of the present invention.

[0021] Figure 5 It is an enlarged bottom view of the main parts of the table and the guided member of the grinding machine according to the first embodiment of the present invention.

[0022] Figure 6 is based on Figure 3 An enlarged view of the main part of the AA section.

[0023] Figure 7 is based on Figure 3 An enlarged view of the main part of the BB cross section.

[0024] Figure 8 This is an enlarged perspective view of a main portion of a guided member of a grinding machine according to a first embodiment of the present invention.

[0025] Figure 9 It is an explanatory diagram of a guide mechanism of a grinding machine according to a second embodiment of the present invention.

[0026] Figure 10 It is an explanatory diagram of another guide mechanism of the grinding machine according to the second embodiment of the present invention.

[0027] Description of Reference Numerals

[0028] 100: Grinding machine; 101: Main body base; 102: Saddle; 103: Workbench; 104: Guide component; 105: Guided component; 106: Column; 107: Grinding tool; 111, 112, 113, 114: Oil passage; 111a, 112a, 113a, 114a: First hole; 111b, 112b, 113b, 114b: Second hole; 111c, 112c, 113c, 114c: Hole opening; 130: Sheet; 141: Groove; 142: Oil supply port; 143: Contact area; 502: Saddle; 503: Workbench; 504: Guide component; 505: Guided component; 530: Sheet. DETAILED DESCRIPTION

[0029] (First embodiment of the present invention)

[0030] The following is based on Figures 1 to 8 A grinding machine according to a first embodiment of the present invention will be described.

[0031] In each drawing, a grinding machine 100 according to the present embodiment includes a main body base 101 , a saddle 102 , a table 103 , a guide member 104 , a guided member 105 , a column 106 , and a grinding wheel 107 .

[0032] In the grinding machine 100, the saddle 102 is arranged so as to be able to move along the main body base 101 arranged horizontally. Figure 1 In addition, on the saddle 102, the workbench 103 is configured to be able to move along the left and right directions (X direction). Figure 1 The proximal-deep direction (in Figure 2 Y direction in the middle) reciprocating motion.

[0033] Furthermore, two guide members 104A and 104B serving as guide members 104 are fixed to the upper surface of the saddle 102 and are used to guide (guide) the work table 103. Furthermore, two guided members 105A and 105B serving as guided members 105 are fixed to the lower portion (bottom surface) of the work table 103 and are used to slide along the guide members 104A and 104B.

[0034] The column 106 is fixed to the main body base 101 and has the same structure as a known surface grinder. The column 106 includes a drive unit 106a, a grinding spindle head 106b that is rotationally driven by the drive unit 106a, and a retaining frame 106c that allows the grinding spindle head 106b to be detachably mounted. A grinding tool 107 is mounted on the grinding spindle head 106b.

[0035] In such a grinding machine 100 , the saddle 102 is driven to move the workpiece W on the table 103 toward the grinding wheel 107 , and the table 103 is reciprocated to perform grinding of the workpiece W using the grinding wheel 107 .

[0036] The guide member 104 and the guided member 105 are guide mechanisms that guide the table 103 by sliding when the table 103 moves relative to the saddle 102. Specifically, the guide mechanism includes guide members 104A and 104B fixed to the saddle 102 and guided members 105A and 105B fixed to the table 103.

[0037] The guide members 104 (104A, 104B) are elongated rail-shaped members that function to constrain the table 103 in a predetermined direction ( Figure 2The guide members 104 (104A, 104B) are provided with a V-shaped groove in a continuous cross-section along their longitudinal direction. The V-shape is a tapering concave portion formed by two opposing, inclined line segments. However, the corners at the V-shaped tips of the grooves in the guide members 104 (104A, 104B) are removed by back-off machining, as is the case with known components of this type.

[0038] The guide members 104 (104A, 104B) are formed with a V-shaped cross-sectional groove that is continuous in the longitudinal direction, thereby having an inner surface of the groove that is inclined in the transverse direction. More specifically, the guide members 104 (104A, 104B) have two inclined surfaces that are inclined in the transverse direction. These inclined surfaces serve as guide surfaces for supporting and guiding the guided members 105 (105A, 105B).

[0039] The guide members 104A and 104B are fixed to the upper surface of the saddle 102 so that their longitudinal directions are parallel to each other. These guide members 104A and 104B restrain the table 103 from moving in directions other than its longitudinal direction and bear the load of the table 103 and the workpiece W mounted on the table 103.

[0040] The guided members 105 (105A, 105B) are elongated, rail-like members shorter than the guide members 104 (104A, 104B). A ridged portion with an inverted V-shaped cross section is formed continuously along its longitudinal direction at its lower portion. An inverted V-shaped shape is one in which two opposing, inclined line segments form a tapering ridge. However, the tips of the ridges of the guided members 105 (105A, 105B) are chamfered, as is the case with known members of this type.

[0041] The ridges of the guided member 105 ( 105A, 105B) are inserted into the grooves of the guide member 104 ( 104A, 104B) having a V-shaped cross section, whereby the guided member 105 ( 105A, 105B) moves along the guide member 104 ( 104A, 104B).

[0042] The guided members 105 (105A, 105B) have ridges with an inverted V-shaped cross-section that are continuous in the longitudinal direction, resulting in outer surfaces of these ridges that are inclined in the transverse direction. More specifically, the guided members 105 (105A, 105B) have two inclined surfaces that are inclined in the transverse direction. These inclined surfaces serve as guided surfaces facing the guide members 104 (104A, 104B).

[0043] The guided members 105A and 105B are fixed to the bottom surface of the workbench 103 in a manner that the longitudinal directions of the members are parallel to each other. The workbench 103 is moved along the guide members 104A and 104B via the guided members 105A and 105B. Figure 2 The work table 103 is shown to be guided in the direction Y. On the other hand, the work table 103 applies a load of the work table 103 itself and the workpiece W mounted thereon to the guide members 104A and 104B via the guided members 105A and 105B.

[0044] like Figure 3 As shown, fluororesin sheets 130 ( 130A, 130B) are fixedly provided on the guided members 105A, 105B over the entire length of the guided members 105A, 105B in the longitudinal direction, respectively.

[0045] Two sheets 130 (130A, 130B) are fixed to the ridges of the guided member 105A with an inverted V-shaped cross section. That is, the two sheets 130 (130A, 130B) are fixed to two surfaces inclined in the short-side direction of the guided member 105A.

[0046] Furthermore, two sheets 130 (130A, 130B) are fixed to the ridges of the guided member 105B, each having an inverted V-shaped cross section. Specifically, the two sheets 130 (130A, 130B) are fixed to two surfaces inclined in the short-side direction of the guided member 105B.

[0047] However, in each of the guided members 105A and 105B, the chamfered portions at the front ends of the convex stripes are portions that do not come into contact with the guide members 104A and 104B, and therefore the sheet 130 is not provided.

[0048] Guided members 105A and 105B are in surface contact with corresponding guide members 104A and 104B on the surfaces of sheets 130 (130A and 130B) to which they are fixed. The surfaces of sheets 130 (130A and 130B) fixed to guided members 105A and 105B serve as sliding surfaces that contact guide members 104A and 104B and guide table 103.

[0049] By arranging the sheets 130 ( 130A, 130B) on the guided members 105 ( 105A, 105B), the sheet size in the longitudinal direction can be further reduced compared to the case where the sheet is provided on the guide member side, thereby reducing the sheet cost.

[0050] The sheet 130 ( 130A, 130B) fixed to the guided members 105A, 105B has a groove 141 provided on its sliding surface, and an oil supply port 142 is provided in the groove 141 .

[0051] The oil supply ports 142 of the grooves 141 of the sheets 130 ( 130A, 130B) communicate with the oil passages 111 , 112 , 113 , and 114 for supplying lubricating oil.

[0052] The oil passages 111, 112, 113, and 114 are formed by combining two holes with different orientations. One of the two holes is a first hole 111a, 112a, 113a, and 114a that extends from the outer surface of the worktable 103 to the top of the oil supply port 142. The other of the two holes is a second hole 111b, 112b, 113b, and 114b that extends from the oil supply port 142 of the sheets 130A and 130B through the guided components 105A and 105B to the worktable 103 and communicates with the first hole.

[0053] The oil passage 111 communicating with the oil supply port 142 of one sheet 130A fixed to the guided member 105A is provided so that the hole opening 111 c of the oil passage is located on a predetermined side surface of the outer surface of the table 103 close to the guided member 105A.

[0054] The oil passage 112 communicating with the oil supply port 142 of the other sheet 130B fixed to the guided member 105A is provided so that the hole opening 112 c of the oil passage is located on the same side as the oil passage 111 on the outer surface of the table 103 .

[0055] Thus, the respective openings 111c and 112c of the oil passages 111 and 112 located on the same surface of the table 103 as the guided member 105A serve as inlets for the lubricating oil to the oil passages 111 and 112. Flexible tubes or the like for supplying lubricating oil in accordance with the movement of the table 103 are connected to these openings 111c and 112c.

[0056] On the other hand, the oil passages 113 and 114 communicating with the oil supply ports 142 of the one sheet 130A and the other sheet 130B fixed to the guided member 105B are arranged differently from the oil passages 111 and 112 .

[0057] Specifically, the oil passage 113 communicating with the oil supply port 142 of one sheet 130A is provided so that the hole opening 113 c of the oil passage is located on the other side of the outer surface of the table 103 opposite to the oil passages 111 and 112 .

[0058] The oil passage 114 communicating with the oil supply port 142 of the other sheet 130B is provided so that the hole opening 114 c of the oil passage is located on the same side surface as the oil passage 113 on the outer surface of the table 103 .

[0059] Thus, the respective openings 113c and 114c of the oil passages 113 and 114 located on the same surface of the table 103 as the guided member 105B serve as inlets for the lubricating oil to the oil passages 113 and 114. Flexible tubes or the like for supplying lubricating oil in accordance with the movement of the table 103 are also connected to these openings 113c and 114c.

[0060] In this manner, the lubricating oil inlet-side openings 111c, 112c, 113c, and 114c of the oil passages communicating with the oil supply ports 142 of each sheet 130 are positioned on the outer surface (side surface) of the worktable 103. This allows the lubricating oil supply mechanism to be positioned so as not to interfere with the movement of the worktable 103. In particular, this prevents the lubricating oil supply flexible tube and other components from contacting or becoming entangled with the guide or guided components, or from becoming detached from the worktable 103. Furthermore, there is no need to install a lubricating oil supply mechanism, typically a flexible tube, between the two guided components 105A and 105B, thus avoiding the complexity of the structure for moving, guiding, and supporting the worktable 103 and reducing manufacturing costs.

[0061] Each of the oil passages 111, 112, 113, and 114 is arranged above an oil supply port 142 that communicates with hole openings 111c, 112c, 113c, and 114c on the outer surface of the table 103. Furthermore, the first holes 111a, 112a, 113a, and 114a forming the oil passages are horizontally arranged at positions where they communicate with the second holes 111b, 112b, 113b, and 114b.

[0062] Furthermore, for each oil passage, if the vertical dimension (thickness) of the table on which the oil passage is provided is sufficiently large, the first hole forming the oil passage may be oriented obliquely downward until it reaches the point of communication with the second hole. Furthermore, rather than having the first and second holes forming the oil passage intersect at a predetermined angle, a structure may be employed in which the holes are smoothly connected and communicated via a curved hole portion.

[0063] Thus, in each of the oil passages 111, 112, 113, and 114, the hole openings 111c, 112c, 113c, and 114c on the outer surface of the worktable 103 are positioned above the oil supply port 142 and at the uppermost position within the entire oil passage. This facilitates the flow of lubricating oil within the oil passage toward the oil supply port 142, allowing lubricating oil to be smoothly and reliably delivered to the oil supply port 142 and out of the groove 141. Furthermore, as long as the hole openings of each oil passage are positioned above the oil supply port 142 and at the uppermost position within the entire oil passage, the hole openings of the oil passages may be located at locations other than the side surfaces of the outer surface of the worktable 103.

[0064] The sheet material 130 of this embodiment will be described in detail. The sheet material 130 is a sheet-shaped fluororesin material containing PTFE as a main component.

[0065] The sheet 130 is formed to have a length extending over the entire length of the guided member 105 in the longitudinal direction, and a groove portion 141 is provided on the surface of the sheet 130 .

[0066] As the top view shape of the groove portion 141, the groove portion 141 has a basic unit shape, and the basic unit shape starts from a specified vertex position V, and on both sides of the long side direction of the sheet 130, in an inclined direction inclined relative to the long side direction, the grooves are respectively continuous in a straight line, symmetrical across the vertex position V, and in an inverted V shape.

[0067] Furthermore, the overall shape of the groove portion 141 in a plan view is a shape in which two basic unit shapes are arranged in the longitudinal direction of the sheet 130. Furthermore, the grooves of the basic unit shapes are connected to each other, and the groove portion 141 is a single continuous groove, but the present invention is not limited thereto. The basic unit shapes may not be connected to each other, and a plurality of groove portions may be formed independently.

[0068] The oil supply port 142 of the groove portion 141 is provided in each basic unit shape of the groove. The groove portion 141 is formed by arranging two basic unit shapes. Therefore, two oil supply ports 142 are provided for each groove portion 141. Two oil passages are provided corresponding to each oil supply port 142, and lubricating oil is evenly supplied to each.

[0069] In addition, as long as the oil supply port 142 is provided in the groove portion 141 and lubricating oil can be supplied to the groove portion 141 , the size of the second hole of the oil passage 111 , 112 , 113 , 114 connected to the oil supply port 142 may be larger than the groove width of the groove portion 141 .

[0070] The groove 141 is provided on the sheet 130 over the entire longitudinal direction thereof. Figure 3As shown, the groove 141 does not reach either end of the short side direction or the long side direction of the surface of the sheet 130. In the example of this embodiment, the end of the groove 141 of the sheet 130 is located near the end of the short side direction of the sheet 130 and near the end of the long side direction.

[0071] Here, the vicinity of the end of the long side or short side direction of the surface of the sheet 130 refers to the area of the surface of the sheet 130 whose distance from the end in each direction is less than a predetermined threshold (for example, 3%, 5%, 10%, etc., of the width of the short side direction of the sheet 130).

[0072] Since the grooves 141 do not reach the ends of the sheet 130 in any direction, machining of the grooves can avoid the ends of the resin sheet, which are particularly weak, thereby preventing machining errors such as unexpected defects. Furthermore, since the grooves 141 do not reach the ends of the sheet 130 and are not open outward at the ends, lubricating oil can be prevented from leaking from the ends of the sheet 130 through the grooves 141 while in sliding contact with the guide member 104.

[0073] The sheet 130 is in surface contact with the corresponding guided member 105 in an area (contact area 143 ) other than the groove portion 141 on the surface thereof.

[0074] The groove 141 has a portion extending in the short-side direction from near one end to near the other end on the surface of the sheet 130. This allows the grinding machine 100 to supply lubricating oil to the contact area 143 over a wider area in the short-side direction of the surface of the sheet 130 in response to the sliding movement of the corresponding guided member 105.

[0075] In this embodiment, the groove 141 is present in a range from near one end in the short-side direction of the sheet 130 to near the other end, but the starting end or the ending end of the groove 141 does not necessarily coincide with the position near the end in the short-side direction of the sheet 130. However, as another example, the groove 141 may be provided from a position near one end in the short-side direction of the sheet 130 to a position near the other end.

[0076] In this embodiment, the oil supply port 142 provided in the groove portion 141 is located near the vertex position V of the inverted V-shaped basic unit shape of the groove portion 141. Since the sheet 130 is inclined in the short-side direction, the lubricating oil supplied from the oil supply port 142 is more likely to move downward due to gravity.

[0077] As a result, lubricating oil supplied from oil supply port 142, located near vertex position V at the top of groove 141, more efficiently spreads throughout groove 141. Furthermore, lubricating oil is more efficiently supplied from groove 141 to contact area 143 in response to the sliding movement of guided member 105 relative to guide member 104. As a result, degradation of sheet 130 is further suppressed, further minimizing performance degradation of the guide mechanism of table 103.

[0078] The oil supply ports 142 in the groove 141 of sheet 130A and the oil supply ports 142 in the groove 141 of sheet 130B are typically preferably located at the topmost portion of the groove 141, i.e., at the vertex V. However, in this embodiment, each oil supply port 142 is located near a position offset in a different direction relative to the vertex V of the groove 141. This is to prevent the oil passage 111 connecting to the oil supply port 142 of one sheet 130A and the oil passage 112 connecting to the oil supply port 142 of the other sheet 130B from overlapping on the side of the workbench 103 with the guided member 105A. Similarly, on the side of the workbench 103 with the guided member 105B, the oil passage 113 connecting to the oil supply port 142 of one sheet 130A and the oil passage 114 connecting to the oil supply port 142 of the other sheet 130B from overlapping.

[0079] The oil supply ports 142 in sheet 130A and 130B on the same guided component can also be configured so that the oil passage (first hole) communicating therewith is shared, with each oil supply port 142 located at the vertex position V of groove 141. However, in this case, the amount of lubricating oil supplied through the oil passage from the oil supply ports 142 of each sheet 130A and 130B, which should be equal, becomes unbalanced. Therefore, it is preferable to separate the oil passage for each sheet, so that lubricating oil is supplied individually to the oil supply ports 142 of each sheet 130A and 130B.

[0080] Furthermore, the positions of the oil supply ports 142 can be aligned with the vertex position V of the groove 141, taking into account that the oil passages communicating with the oil supply ports 142 in the two sheets affixed to the same guided component do not overlap within the worktable 103. For example, this can be achieved by tilting the first holes of the oil passages at a predetermined angle other than a right angle relative to the side surface of the worktable 103 where the oil passage openings are located. However, in this case, the first holes of the oil passages are longer than in the case of a right angle, which provides the shortest possible path.

[0081] In this embodiment, the oil supply port 142 in the groove 141 of the sheet 130 is located at the uppermost position in the sheet 130 where the oil supply port 142 can be located, that is, near the vertex position V of the groove 141. However, as another example, the oil supply port 142 may be located at a position other than near the vertex position V, higher up in the inclined sheet 130, that is, at a height above the center of the sheet 130. If the oil supply port 142 is located at a height above the center of the sheet 130, the lubricating oil can be fully distributed throughout the contact area 143 of the sheet 130 by utilizing the property of lubricating oil moving downward due to gravity. In this case, for example, the oil supply port 142 may be located in the center of the short side of the sheet 130 in the groove 141 of the sheet 130, that is, at a height above the center of the sheet 130.

[0082] The groove 141 is arranged so as not to be included in any area crossing the sheet 130 in the short-side direction within the area on the sheet 130. Here, crossing the short-side direction of the sheet 130 means that a predetermined area starting from any position at one end of the short-side direction of the sheet 130 extends along the short-side direction to the other end, and is continuously connected from one end to the other end in the short-side direction.

[0083] That is, in the area on the sheet 130, any area that crosses the sheet 130 in the short-side direction of the sheet 130 is not occupied by the groove portion 141, and includes the contact area 143. Therefore, the sheet 130 has no gap in the long-side direction, and the contact area 143 is supported by the guide member 104 corresponding to the guided member 105.

[0084] If a portion of the guided member 105 is not supported by the guide member 104 in the contact area 143 along its longitudinal direction, this portion will experience slight vibrations, similar to the area between balls in a ball guide or between rollers in a hollow roller guide. This can result in uneven grinding of the object being ground. In this embodiment, the sheet 130 is supported by the guide member 104 in its contact area 143 at any position along its longitudinal direction, thereby suppressing vibrations and preventing uneven grinding.

[0085] In addition, the groove portion of the sheet 130 only needs to not cross the sheet 130 along its short side direction, that is, not be continuously connected from one end to the other end of the short side direction of the sheet 130. For example, a part of the groove portion can be set to be parallel to the short side direction.

[0086] Lubricating oil supplied from the oil supply port 142 spreads toward the contact area 143 via the groove 141 in response to the sliding movement of the guided member 105 relative to the guide member 104. This reduces friction between the contact area 143 between the guide member 104 and the sheet 130, corresponding to the guided member 105. Consequently, the grinding machine 100 can further reduce wear in the contact area 143 of the sheet 130, thereby suppressing degradation of the sheet 130. Consequently, the grinding machine 100 can further suppress degradation in the performance of the guide mechanism of the table 103.

[0087] In this embodiment, if Figure 3 As shown, the groove 141 has a plan view that is an overall shape formed by further arranging an inverted V-shaped structure, combining linear shapes inclined relative to the longitudinal direction of the sheet 130. Each linear portion of the groove 141 is arranged so as to be inclined at a predetermined acute angle relative to the longitudinal direction of the sheet 130. The groove 141 extends substantially throughout the longitudinal direction of the sheet 130, allowing the grinding machine 100 to supply lubricating oil to the contact area 143 over a wide area in response to the sliding movement of the guided member 105.

[0088] Regarding the inclination of each linear portion of groove 141 relative to the longitudinal direction of sheet 130, the smaller the angle, the larger the range of the linear portion of groove 141 that can be located in the longitudinal direction of sheet 130. However, if the inclination angle of the linear portion is too small, the effectiveness of supplying oil from groove 141 to contact area 143 during sliding is reduced. Therefore, an appropriate angle is set. Furthermore, the inverted V-shaped basic unit shape of groove 141 and the number of arrangements are set so that lubricating oil can be supplied from each linear portion of groove 141 to the entire longitudinal direction of sheet 130.

[0089] When the guided member 105 slides relative to the guide member 104, the end surface of the guide member 104 on the side opposite to the sliding direction moves relatively away from the guided member 105 and becomes exposed. Consequently, the amount of lubricating oil remaining in the groove 141 near the longitudinal end of the sheet 130 due to the sliding of the guided member 105 is reduced by the amount of lubricating oil adhering to the end surface of the guide member 104 on the side opposite to the sliding direction and leaving the sheet 130.

[0090] On the other hand, in the central part of the long side direction of the sheet 130 in the groove 141, the lubricating oil will not separate from the sheet 130 even after the sliding of the guided component 105, so that the amount of lubricating oil in the groove 141 will hardly decrease except for the amount supplied to the contact area 143.

[0091] On the inclined sheet 130 , the groove 141 has an overall shape formed by arranging two inverted V shapes, so that even if the guided component 105 slides, it is difficult to cause the movement distribution of the lubricating oil in the groove 141 beyond the top position in the groove 141 .

[0092] According to these aspects, when the guided member 105 slides, the lubricating oil is relatively retained and accumulated in the longitudinal center portion of the groove 141, which is sandwiched between the two apex positions, relative to the portion near the longitudinal end of the sheet 130 where the amount of lubricating oil entering and exiting is greater. This makes it difficult for the lubricating oil to be interrupted between the sheet 130 and the guide member 104, and it is easy to maintain a state in which the lubricating oil reduces friction in the contact area 143 between the guide member 104 and the sheet 130.

[0093] Alternatively, the groove 141 can be configured as a straight line, with the inclination angle θ of the groove 141 relative to the longitudinal direction of the sheet 130 being an acute angle below a predetermined threshold (e.g., 10°, 15°, 30°, etc.). In this case, the smaller the inclination angle θ of the groove 141 relative to the longitudinal direction of the sheet 130, the larger the range of the groove 141 in the longitudinal direction of the sheet 130. Therefore, by setting the inclination angle θ below the predetermined threshold, the grinding machine 100 can preferably supply lubricating oil to the contact area 143 over a wider range in response to the sliding of the guided member 105.

[0094] However, the present invention is not limited thereto, and as another example, the groove 141 may be configured such that the inclination angle θ with respect to the longitudinal direction of the sheet 130 is larger than a predetermined threshold value.

[0095] The groove 141 is designed so that its cross-section widens from the bottom toward the opening. This allows the grinding machine 100 to more efficiently supply lubricating oil within the groove 141 to the contact area 143 in response to the sliding movement of the corresponding guided member 105. As a result, the grinding machine 100 further suppresses degradation of the sheet 130 due to wear, further minimizing performance degradation of the guide mechanism of the table 103.

[0096] The groove portion 141 is configured so that at least one of the groove depth and groove width is smaller near the groove end than at other locations, thereby reducing the size of the groove portion 141. Thus, the groove portion 141 is reduced in size near the groove end, reducing the amount of lubricating oil in the groove portion 141 toward the end.

[0097] This is because lubricating oil does not need to be supplied to the front end of the contact area 143 near the longitudinal end of the sheet 130 in the groove portion 141. If the groove portion 141 is reduced in size, some grooving of the sheet 130 can be omitted, which can reduce processing costs accordingly.

[0098] On the other hand, lubricating oil is relatively retained and accumulated in the groove 141, except for the ends in the longitudinal direction of the sheet 130. Consequently, the lubricating oil is less likely to be interrupted between the sheet 130 and the guide member 104, and the friction in the contact area 143 between the guide member 104 and the sheet 130 is easily maintained by the lubricating oil.

[0099] In this embodiment, the groove 141 is formed by cutting the surface of the sheet 130. The groove 141 is preferably formed by cutting the sheet 130 after the sheet 130 is fixed to the guided member 105 by bonding. The reason for this is as follows.

[0100] Sheet material 130 is made of a fluororesin material that deforms more easily than metal. If a thin portion (thin-walled portion) corresponding to the groove is formed during cutting, this thin-walled portion will deform more easily than other portions. In this case, the pressure applied during bonding could cause uncured adhesive to flow toward the thin-walled portion of the sheet, causing bulges or overflow in the thin-walled portion.

[0101] Therefore, the sheet 130 is fixed to the guided member 105 by bonding while the grooves having uniform thickness are not processed, thereby preventing deformation of the sheet 130 due to unevenness of the adhesive. Furthermore, it is preferable to process the grooves 141 on the surface of the sheet 130 fixed to the guided member 105 after the adhesive has cured.

[0102] However, the oil supply port 142 in the groove portion 141 may be provided in the sheet 130 before being fixed to the guided member 105 .

[0103] Furthermore, the process of providing the groove 141 is not limited to cutting; the groove 141 can also be provided by pressing a jig having a shape corresponding to the groove. When using this method, the operator simply presses the jig against the sheet 130. Therefore, proficiency in surface processing techniques such as cutting and scraping is not required, and processing time is also shortened, making it easier and quicker to provide the groove 141. Furthermore, during the manufacturing phase of the sheet 130, it is not necessary to use processing equipment solely for providing the groove 141, meaning that the groove 141 can be provided. Furthermore, this method is also suitable for providing the groove 141 on a sheet 130 that has already been affixed to the guide member 104.

[0104] Next, the state of the guide mechanism when grinding a workpiece using the grinding machine of this embodiment will be described. As a prerequisite, in the grinding machine 100, the workpiece W to be ground is properly mounted and fixed on the worktable 103, and the workpiece W is in a state where it can be smoothly ground using the grinding tool 107.

[0105] In addition, in the grinding machine 100, the workpiece W on the table 103 is moved by driving the saddle 102. Figure 1 The movement in the X direction shown is assumed to be an ideal movement that does not affect grinding.

[0106] When grinding a workpiece W using the grinding machine 100, the table 103 supporting the workpiece W is guided on the guide member 104 along with the guided member 105 and the sheet 130, reciprocating therewith. In the grinding machine 100, while the table 103 is guided on the guide member 104, lubricating oil is supplied from the oil supply port 142 of the sheet 130 to the groove 141, and lubricating oil is supplied from the groove 141 to the contact area 143, while the workpiece W is being ground. This suppresses vibration of the table 103, minimizing uneven grinding of the workpiece W. Furthermore, it further minimizes degradation in the performance of the guide mechanism of the table 103, enabling grinding of the workpiece W.

[0107] Thus, in the grinding machine of this embodiment, the sheet 130, which forms the sliding surface of the guided member 105, is in surface contact with the guide member 104, making it difficult to generate gaps in the guide mechanism and suppressing minute vibrations caused by gaps. Furthermore, lubricating oil supplied from the oil supply port 142 is more efficiently delivered to the contact area 143 of the sheet 130 via the groove 141 of the sheet 130, thereby suppressing degradation of the sheet 130 due to wear. Consequently, degradation of the guide mechanism of the table 103 using the sheet 130 can be suppressed.

[0108] Furthermore, the groove 141 is configured to be an area on the sheet 130 and does not include any area that crosses the sheet 130 in the short-side direction. Therefore, the grinding machine 100 can support the corresponding guided member 105 in the contact area 143 without a gap in the long-side direction of the sheet 130, further suppressing the generation of vibration.

[0109] In addition, in the grinding machine of this embodiment, the groove portion 141 of the sheet 130 is configured to have a cross-sectional shape that is V-shaped, circular arc-shaped, or the like, and that expands from the bottom side of the groove toward the groove opening side, but is not limited thereto. That is, the sheet may also be provided with a groove portion whose cross-sectional shape is different from the shape that expands from the bottom side relative to the groove opening side. For example, a groove portion having a square or rectangular cross-sectional shape may be provided in the sheet. In this case, an oil supply port is also provided in the groove portion. Furthermore, a plurality of groove portions having different cross-sectional shapes may also be provided in the sheet. In this case, an oil supply port is provided in each of the plurality of groove portions.

[0110] (Second embodiment of the present invention)

[0111] In the grinding machine of the first embodiment, the guide mechanism of the work table 103 is configured to include: a guide member 104 having a V-shaped cross section and a guided member 105 having an inverted V-shaped cross section, but the present invention is not limited thereto. For example, the guide mechanism of the work table may also be configured to include: Figure 9 As shown, there are a guide member 504 having an inverted V-shaped cross section and a guided member 505 having a V-shaped cross section.

[0112] In this case, if Figure 9 As shown, the sliding surface of the guided member 505 having a V-shaped cross section is composed of sheets 530D and 530E, which are fixed to two surfaces of the guided member 505 having a groove formed therein. As in the first embodiment, each of the sheets 530D and 530E is provided with a groove, and an oil supply port is provided in the groove.

[0113] In addition, as another example, it can also be configured as follows: Figure 10 As shown, there is a guiding part 504D having a V-shaped cross-sectional shape, and a guided part 505D having a corresponding inverted V-shaped cross-sectional shape. On the other hand, there are a guiding part 504E having a different cross-sectional shape, and a guided part 505E corresponding to it, as a plurality of groups with different cross-sectional shapes, each having a combination of a guiding part and a guided part.

[0114] Guide member 504D is a rail-shaped member with a V-shaped cross-sectional groove continuously provided along its longitudinal direction. Guide member 504E is a rail-shaped member with a flat upper portion. Guide members 504D and 504E are fixed to the upper surface of saddle 502 with their longitudinal directions parallel to each other.

[0115] On the other hand, the guided member 505D is a rail-shaped member with an inverted V-shaped cross-section. It has a ridged portion with an inverted V-shaped cross-section on its lower portion. The sliding surface of this ridged portion makes surface contact with the V-shaped groove of the guide member 505D. Furthermore, the guided member 505E is a rail-shaped member with a flat lower portion. It contacts the guide member 504E via its sliding surface. The guided members 505D and 505E are fixed to the bottom surface of the workbench 503 with their longitudinal sides parallel to each other. In this case, sheets 530F and 530G are fixed to the lower surfaces of the guided members 505D and 505E, respectively, that face the guide members 504D and 504E, forming sliding surfaces.

[0116] The sheets 530F and 530G are each provided with a groove portion similar to the first embodiment, and an oil supply port is provided in the groove portion. Figure 10 In the example shown, guide member 504D serves the following function: it constrains movement of guided member 505D in the short-side direction, limiting the worktable to movement in the long-side direction of guide member 504D. Meanwhile, guide member 504E does not constrain movement of guided member 505E in the short-side direction at all, and primarily serves to bear the load of the worktable and the workpiece supported on it.

[0117] (Third embodiment of the present invention)

[0118] In the grinding machine 100 of the first embodiment, only the groove portion 141 is provided on the sheet 130 forming the sliding surface, but the present invention is not limited thereto.

[0119] For example, the sheet materials forming the sliding surface may be configured to have grooves and recesses in their respective contact areas. For example, one or more recesses may be provided in a plan view in a circular shape in a contact area different from the grooves of the sheet materials.

[0120] The lubricating oil supplied from the oil supply port to the groove portion is supplied from the groove portion to the contact area in response to the sliding of the guided member relative to the guide member. If the contact area of the sheet is provided with a recessed portion, part of the lubricating oil supplied to the contact area is accumulated in the recessed portion.

[0121] This creates a thicker oil film in the recess than in the surrounding area. This oil film further reduces friction between the sheet and the guide member. As a result, the grinding machine further suppresses degradation of the sheet due to wear, further minimizing the performance degradation of the guide mechanism. Furthermore, the recess can supply the lubricating oil it retains to the surrounding contact area in response to the sliding motion of the table.

[0122] Furthermore, the recessed portion is circular in plan view, but may have other shapes. As another example, the recessed portion may be rectangular in plan view. Alternatively, the recessed portion may be triangular in plan view. Alternatively, the recessed portion may be elliptical in plan view.

[0123] (Fourth embodiment of the present invention)

[0124] In the first embodiment of the grinding machine 100, the sheet 130 forming the sliding surface is provided with grooves 141. The plan view of the grooves 141 is an overall shape formed by arranging the grooves. The inverted V-shaped shape is formed by linear portions inclined relative to the longitudinal direction of the sheet 130. However, this is not limiting. In other words, the sheet forming the sliding surface may also be provided with grooves having other plan view shapes.

[0125] For example, the sheet may be provided with a plurality of linear grooves arranged along the short side of the sheet, the groove portion being V-shaped in plan view with the tip of the V-shaped groove facing one side in the long side of the sheet.

[0126] In this case, when the guided member slides on the corresponding guide member in the direction indicated by the tip of the V-shaped groove in the longitudinal direction thereof, the groove can more efficiently supply lubricating oil to the contact region.

[0127] Alternatively, in addition to the V-shaped groove, another V-shaped groove having an inverted top view may be provided with the tip of the V facing the other direction in the longitudinal direction of the sheet, thereby providing the sheet with multiple grooves. In this case, even if the guided member slides on the corresponding guide member in each longitudinal direction, it will slide in the direction indicated by the tip of the V-shaped groove, thereby more efficiently supplying lubricating oil to the contact area.

[0128] Alternatively, the sheet may be provided with a groove portion having a linear groove intersecting the sheet and forming an X-shape when viewed from above. In this case, even if the guided member slides in the longitudinal direction on the corresponding guide member, the groove portion can more efficiently supply lubricating oil to the contact area.

[0129] Alternatively, the sheet may be provided with a groove portion having a plurality of linear grooves arranged in a continuous pattern parallel to the longitudinal or transverse direction of the sheet, with the shape of a square wave or rectangular wave in plan view. In this case, by providing multiple oil supply ports within a single groove portion, lubricating oil can be easily distributed throughout the entire length of the groove portion, allowing lubricating oil to be supplied from a single groove portion to the entire contact area on the sheet.

[0130] Furthermore, the sheet may be provided with grooves that are not linear in plan view, such as wavy grooves. In this case, the grooves can more efficiently supply lubricating oil to the contact area as the guided member slides.

[0131] Thus, even if one or more grooves having a planar shape different from that of the first embodiment are provided on the sheet, the grooves can more efficiently supply lubricating oil to the contact area. As a result, the grooves can further suppress degradation of the performance of the guide mechanism of the workbench by further suppressing degradation of the sheet due to wear.

[0132] (Fifth embodiment of the present invention)

[0133] In the grinding machine of the first embodiment, the sliding surfaces of the guided members 105 of the guide mechanism of the table 103 are formed of fluororesin sheets 130 fixed to the guided members 105. However, as another example, only the sliding surfaces of some of the guided members may be formed of sheets.

[0134] For example, when two guided members are fixed to the table as in the first embodiment, the sheet forming the sliding surface may be fixed to only one of the guided members.

[0135] In the grinding machine of the first embodiment, the guide mechanism of the table 103 includes two guide members 104 fixed to the saddle 102 and two guided members 105 fixed to the table 103 . However, a different configuration may be employed.

[0136] For example, the guide mechanism of the workbench may include a single guide member fixed to the saddle portion as a sliding guide member. In this case, a guided member is fixed to the bottom surface of the workbench, and the workbench slides along the single guide member via a sliding surface formed of a sheet material fixed to the single guided member in contact with the single guide member.

[0137] Alternatively, the guide mechanism of the workbench may include three or more guide members fixed to the saddle as guide members for sliding. In this case, three or more guided members are fixed to the bottom surface of the workbench, and the workbench contacts the three or more guide members fixed to the saddle via sliding surfaces formed of sheets fixed to the three or more guided members, thereby sliding along the three or more guide members.

Claims

1. A grinding machine, characterized in that: A guide mechanism is provided for sliding a table supporting a workpiece to be ground along a rail-shaped guide member and guiding the table in a predetermined direction. The grinding machine is provided with: a rail-shaped guided member fixed to the lower portion of the workbench, capable of sliding along the guide member and shorter than the guide member; and A sheet made of fluororesin is fixed to the guided member to form a sliding surface. The guided component is inclined in the short side direction. The sheet is fixed in accordance with the inclination of the guided member so that the entire sheet is inclined. A groove is provided on the sliding surface, and an oil supply port is provided in the groove.

2. The grinding machine according to claim 1, wherein An oil passage is provided, which is a hole formed by combining a first hole and a second hole, wherein the first hole extends from the outer surface of the workbench to the top of the oil supply port, and the second hole passes through the guided component from the oil supply port of the sheet to reach the workbench and is connected to the first hole.

3. The grinding machine according to claim 2, wherein: The guided member has a plurality of inclined surfaces inclined in the short side direction and along the guide member. The sheet is fixed to each of the plurality of inclined surfaces on the guided component. The plurality of oil passages communicating with the oil supply ports of the respective sheets are provided so that the hole openings of the oil passages are located on the same surface of the outer surface of the table.

4. The grinding machine according to claim 2, wherein: Regarding the oil passage, the hole opening of the oil passage on the outer surface of the workbench is arranged above the oil supply port, and the first hole is arranged to be horizontally or obliquely downward at least to the communication position with the second hole.

5. The grinding machine according to claim 1, wherein: As a top view shape of the groove portion, the groove portion has a basic unit shape, and the basic unit shape is continuous in a straight line from a predetermined vertex position on both sides of the long side direction of the sheet in an inclined direction relative to the long side direction, and is symmetrical across the vertex position to form an inverted V shape. The overall shape of the groove portion in a plan view is a shape in which one or more basic unit shapes are arranged in a row in the longitudinal direction of the sheet.

6. The grinding machine according to claim 5, wherein: The oil supply port is provided at the vertex position of each of the basic unit shapes in the groove portion or at a position near the vertex position.

7. The grinding machine according to claim 1, wherein: The ends of the grooves of the sheet are located near at least one of the ends in the short-side direction and the ends in the long-side direction of the sheet, and the grooves do not reach either the ends in the short-side direction or the long-side direction of the sheet.

8. The grinding machine according to claim 1, wherein: The groove portion is provided so that at least one of the depth and the width of the groove is smaller at a portion close to the groove end portion than at other portions.

9. A method for processing a guide mechanism of a grinding machine, characterized in that: In a method for machining a predetermined component forming a sliding surface in a sliding guide mechanism used in a grinding machine, A fluororesin sheet is grooved while the sheet is previously fixed to a guided component, and a groove portion is provided on a sliding surface of the sheet, wherein the fluororesin sheet is fixed to the guided component as part of the guide mechanism by bonding to form the sliding surface.

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