Guide block for linear guidance and method for producing same

Abstract

The present invention relates to a guide block for linear guidance, and a method for producing the guide block, the guide block comprising a block main body and load transmission members. The block main body comprises a pair of leg parts distanced in the width direction, and a table part connecting the tops of the leg parts. The opposite inner sides of the leg parts are each provided with a recessed part extending in the lengthwise direction and open inward. The load transmission members are provided with load transmission grooves, extending rod-like in the lengthwise direction on the widthwise inward side of the recessed parts.

Description

Guide block for linear guide and method of manufacturing the same

[0001] The present invention relates to a guide block for a linear guide that moves linearly along a guide rail and a method for manufacturing the same.

[0002] A linear guide consists of a guide rail, a slider, and a plurality of balls interposed between the guide rail and the slider. On the left and right sides of the guide rail, a rolling groove is formed for the balls to roll. The slider is composed of a guide block consisting of a leg portion having another rolling groove corresponding to the rolling groove and a table connecting the leg portion, a pair of synthetic resin frames coupled to the guide block, end caps coupled to the front and rear of the synthetic resin frames, and end seals coupled to the front and rear of the end caps.

[0003] As illustrated in FIG. 1, the linear guide is composed of a guide rail (1), a slider (100), and a plurality of balls interposed between the guide rail (1) and the slider (100). On both the left and right sides of the guide rail (1), a rolling groove (11) is formed for the balls to roll.

[0004] As illustrated in FIG. 2, the slider (100) is composed of a guide block (200), a frame (300) fitted and coupled to the guide block (200), an end cap (500) positioned on the front and rear surfaces of the frame (300), and a coupling member (600) that connects the end cap (500) to the frame (300). An end seal (700) is further coupled to the end cap (500).

[0005] The guide block (200) is a saddle-shaped metal material and consists of a pair of leg portions (220) and a table portion (230) connecting the upper parts of both leg portions (220). On the inner side of the leg portions (220), a load ball drive groove (21) is formed facing each other. Additionally, a non-load drive hole (not shown) is formed through parallel to the load ball drive groove (21).

[0006] To explain the manufacturing process of the guide block (200) of the conventional linear guide as described above, the overall shape, load ball drive groove (21), and non-load drive hole are formed through drawing, cutting, and machining center processing. Then, it is manufactured through heat treatment, external surface grinding, and grinding of the load ball drive groove (21) which is the track.

[0007] As described above, since the guide block (200) is manufactured through a complex manufacturing process, there were problems such as the processing time being long, the manufacturing process being complex, and having high hardness even in unnecessary parts.

[0008] The present invention is proposed to solve the problems of the conventional technology described above, and aims to provide a guide block for a linear guide and a method for manufacturing the same, which is simple to manufacture, easy to manage processing errors, and has an extended lifespan.

[0009] For the above purpose, the present invention comprises a block body and a load-carrying member;

[0010] The block body includes a pair of leg portions spaced apart in the width direction and a table portion connecting the upper portions of the leg portions;

[0011] A guide block for a linear guide is provided, characterized in that a concave portion is formed on the inner side facing the above-mentioned leg portion, extends along the longitudinal direction, and is inwardly open in the width direction, and the load transmission member is positioned in the concave portions on both sides in the form of a rod extending in the longitudinal direction, and a load transmission groove is formed extending along the longitudinal direction on the surface extending inward in the width direction.

[0012] In the above, the concave portion includes an upper opening surface provided at the top, a lower opening surface provided at the bottom, and an inner surface provided on the inside; the angle formed by the upper opening surface and the lower opening surface is greater than 0°, so that the cross-section of the concave portion is formed in a shape in which the upper and lower heights decrease inward in the width direction.

[0013] In the above, the load-carrying member comprises an outer surface provided on the outer side in the width direction, an upper surface provided on the upper side, and a lower surface provided on the lower side; the outer surface is in contact with the inner surface of the concave portion, the upper surface is in contact with the upper opening surface, and the lower surface is in contact with the lower opening surface; and the angle formed by the upper surface and the lower surface is greater than 0°, so that the cross-section of the load-carrying member is formed in a shape in which the height decreases inward in the width direction.

[0014] In the above, the hardness of the load-driven member is characterized as being greater than the hardness of the block body.

[0015] In addition, the method for manufacturing a guide block for a linear guide described above comprises a step of manufacturing an insert member that serves as a load-transmitting member, a step of forming a block body, a step of sintering an insert, and a step of grinding; wherein the insert member manufactured in the step of manufacturing the insert member is inserted into a concave portion of a block body formed in the step of forming the block body, the block body is sintered in the step of sintering the insert, and the insert member inserted into the concave portion of the block body is ground in the step of grinding to form a load-transmitting groove.

[0016] In the above, in the insert member manufacturing step, the insert member is manufactured by drawing out a member with a cross-section including an upper surface, a lower surface, and an outer surface, and having a curved concave member on the opposite side of the outer surface, and cutting it to a set length; in the block body molding step, sintering powder is fed into a molding die and pressure is applied to form a block body having a table portion and two leg portions, with a concave portion formed on the inner side of the two leg portions; in the insert sintering step, the insert member is inserted into the concave portion of the molded block body, and the sintering powder forming the molded block body is sintered by heating, and the insert member provided in the concave portion is also heated and cooled to heat-treat the insert member.

[0017] The above insert sintering step is characterized by being sintered such that the block body has a lower hardness than the insert member.

[0018] The guide block of a linear guide and the method of manufacturing the same according to the present invention have the effect of being simple to manufacture and having an extended lifespan.

[0019] FIG. 1 is a perspective view illustrating a conventional linear guide as an example, and

[0020] FIG. 2 is an exploded perspective view of the linear guide illustrated in FIG. 1, and

[0021] FIG. 3 is a perspective view illustrating a guide block for a linear guide according to the present invention,

[0022] FIG. 4 is a cross-sectional view along line AA of FIG. 3, and

[0023] Figure 5 is an enlarged view of section "A" of Figure 4.

[0024] All technical and scientific terms used in the description of the present invention, unless otherwise defined, have the meaning generally understood by those skilled in the art to which the present disclosure pertains. All terms used in the present disclosure are selected for the purpose of further clarifying the present disclosure and are not selected to limit the scope of the rights under the present disclosure.

[0025] Expressions such as "comprising," "having," "having," etc. used in the description of the present invention should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions.

[0026] Singular expressions used in the description of the present invention may include the meaning of the plural form unless otherwise stated, and this applies likewise to singular expressions described in the claims.

[0027] Where in the description of the present invention it is mentioned that a component is "connected" or "combined" to another component, it should be understood that the component can be directly connected or combined to the other component, or can be connected or combined through a new or different component.

[0028] The guide block for a linear guide and the method for manufacturing the same according to the present invention will be described in detail below with reference to the attached drawings.

[0029] FIG. 3 is a perspective view illustrating a guide block for a linear guide according to the present invention, FIG. 4 is a cross-sectional view along line AA of FIG. 3, and FIG. 5 is an enlarged view of part "A" of FIG. 4.

[0030] In the following description, the "B" direction of Fig. 3 is described as the length direction, the horizontal direction of Fig. 4 as the width direction, and the vertical direction as the up-and-down direction.

[0031] As illustrated in FIG. 3, a guide block (800) for a linear guide according to the present invention comprises a block body (810) and a load driving member (820).

[0032] The block body (810) is provided in the form of a block. The block body (810) is in the form of a block with a rectangular cross-section and is provided with an opening in the longitudinal direction and downward. The block body (810) comprises a pair of leg portions (811) spaced apart in the width direction and a table portion (813) connecting the upper portions of the leg portions (811).

[0033] The above leg portions (811) are provided in pairs spaced apart in the width direction. The paired leg portions (811) are extended in the length direction and are provided facing each other and side by side. A non-load driving hole (816) and a concave portion (818) are formed in the above leg portions (811).

[0034] The above-mentioned non-loading power hole (816) is formed by extending longitudinally through the leg portion (811). The above-mentioned non-loading power hole (816) is formed as a hole with a circular cross-section.

[0035] The above-mentioned concave portion (818) is formed spaced inward in the width direction from the above-mentioned non-loading electric hole (816). The above-mentioned concave portion (818) is concave on the inner side facing the width direction of the above-mentioned leg portion (811), extends along the length direction, and is formed as an inward opening in the width direction and a length direction.

[0036] The above-mentioned concave portion (818) comprises an upper opening surface (8181) provided at the top, a lower opening surface (8182) provided at the bottom, and an inner surface (8183) provided on the inside.

[0037] The angle (θ) formed by the upper opening (8181) and the lower opening (8182) is greater than 0°, so the cross-section of the concave portion (818) is formed in a shape in which the upper and lower heights decrease inward in the width direction. The angle (θ) formed by the upper opening (8181) and the lower opening (8182) is, of course, less than 180°.

[0038] The upper opening (8181) is formed with a downward slope of 1 to 2° in the width direction and the lower opening (8182) is formed with an upward slope of 1 to 2° in the width direction, and the angle between the upper opening (8181) and the lower opening (8182) is formed in the range of 2 to 4°. By forming the angle between the upper opening (8181) and the lower opening (8182) in the range of 2 to 4°, the load driving member (820) is prevented from detaching from the concave portion (818).

[0039] In the above-mentioned concave portion (818), a concave rounded surface is formed between the inner surface (8183) and the upper opening surface (8181), and between the inner surface (8183) and the lower opening surface (8182).

[0040] The table portion (813) is provided by connecting the upper portions of the pair of leg portions (811) that are spaced apart in the width direction. A plurality of assembly grooves (812) and assembly holes (814) are formed in the table portion (813).

[0041] The assembly grooves (812) are formed in multiple numbers. The assembly grooves (812) are formed concavely outwardly in the longitudinal direction, spaced apart in the width direction from both sides in the longitudinal direction of the table portion (813).

[0042] The assembly holes (814) are formed in multiple numbers. The assembly holes (814) are formed on the upper part of the table portion (813) spaced apart in the width direction and the length direction. The assembly holes (814) are formed in an upwardly concave shape.

[0043] The load driving member (820) is provided in the form of a rod extended in the longitudinal direction. Two load driving members (820) are provided and are provided side by side facing each other in the width direction. The outer surface of the load driving member (820) in the width direction is provided in contact with the inner surface of the block body (810). The load driving member (820) is provided by being inserted into the concave portion (818) of the two leg portions (811) in the width direction of the block body (810).

[0044] In the above load driving member (820), a concave load driving groove (821) extending along the length direction is formed on the surface facing inward in the width direction.

[0045] The above load-driven member (820) comprises an outer surface (825) provided on the outer side in the width direction, an upper surface (823) provided on the upper side, and a lower surface (824) provided on the lower side.

[0046] The outer surface (825) of the load-driven member (820) is in contact with the inner surface (8183) of the concave portion (818), the upper surface (823) is in contact with the upper opening surface (8181), and the lower surface (824) is in contact with the lower opening surface (8182).

[0047] As shown in FIG. 5, the angle (θ) formed by the upper surface (823) and the lower surface (824) is greater than 0°, so the cross-section of the load motor member (820) is formed in a shape that is inward in the width direction and has a reduced height. The angle (θ) formed by the upper surface (823) and the lower surface (824) is, of course, less than 180°.

[0048] The upper surface (823) is formed to be inclined downward by 1 to 2° in the width direction, and the lower surface (824) is formed to be inclined upward by 1 to 2° in the width direction, and the angle between the upper surface (823) and the lower surface (824) is formed in the range of 2 to 4°.

[0049] The upper opening surface (8181) of the block body (810), into which the load electric member (820) is inserted and sintered, is in contact with the upper surface (823) and is formed at an inclination of 1 to 2° downward in the width direction, like the upper surface (823), and the lower opening surface (8182) is in contact with the lower surface (824) and is formed at an inclination of 1 to 2° upward in the width direction, like the lower surface (824).

[0050] Accordingly, the angle between the upper opening (8181) and the lower opening (8182) is formed in the range of 2 to 4°. By forming the angle between the upper opening (8181) and the lower opening (8182) in the range of 2 to 4°, the load electric member (820) is prevented from being dislodged from the concave portion (818) of the block body (810).

[0051] The load driving member (820) is provided with a convex, curved rounding surface between the upper surface (823) and the outer surface (825), and between the lower surface (824) and the outer surface (825). In the concave portion (818) of the block body (810) formed by inserting the load driving member (820), a concave rounding surface is formed that contacts the rounding surface of the load driving member (820) between the inner surface (8183) and the upper opening surface (8181), and between the inner surface (8183) and the lower opening surface (8182).

[0052] As a modified example of the guide block (800) for the linear guide, one or more upper surface protrusions protruding upward are provided on the upper surface (823) of the load drive member (820), and one or more upper surface opening concave portions are formed in the upper opening surface (8181) of the concave portion (818) of the block body (810), into which the upper surface protrusions are inserted.

[0053] One or more downwardly protruding lower protrusions are provided on the lower surface (824) of the load-driven member (820), and one or more lower opening concave portions may be formed in the lower opening surface (8182) of the concave portion (818) of the block body (810), into which the lower protrusions are inserted.

[0054] As described above, an upper surface protrusion and a lower surface protrusion are formed on the load motor member (820), and an upper surface opening concave part and a lower surface opening concave part are formed in the concave part (818) of the block body (810), thereby preventing the load motor member (820) from detaching more reliably.

[0055] The hardness of the load driving member (820) is provided to be greater than the hardness of the block body (810). The hardness of the load driving member (820) is in the range of HRc 61 to 64, and the hardness of the block body (810) is in the range of HRc 58 to 59.

[0056] By increasing the hardness of the load drive member (820) that the direct drive body contacts, the fatigue resistance against rolling fatigue is increased, and by making the hardness of the block body (810) that surrounds the load drive member (820) on the inside lower than the hardness of the load drive member (820) so that it acts as a cushioning material, the impact resistance is improved and the overall lifespan is extended.

[0057] The method for manufacturing a guide block for a linear guide described above will be explained below.

[0058] The above method for manufacturing a guide block for a linear guide comprises a step of manufacturing an insert member that serves as a load-carrying member, a step of forming a block body, a step of sintering the insert, and a grinding step.

[0059] The above insert member manufacturing step involves drawing out a member having a cross-section that includes an upper surface, a lower surface, and an outer surface, and has a curved concave portion on the opposite side of the outer surface, and cutting it to a set length to manufacture the insert member.

[0060] The upper surface of the above member becomes the upper surface (823) of the load-driven member (820), the lower surface of the member becomes the lower surface (824) of the load-driven member (820), and the outer surface of the member becomes the outer surface (825) of the load-driven member (820). Then, the concave portion of the member is ground to form a load-driven groove (821).

[0061] Rounded surfaces are formed between the upper surface and the outer surface of the member, and between the lower surface and the outer surface of the member.

[0062] The upper and lower surfaces of the member are inclined so that their height decreases in the direction from the outer surface of the member toward the inner surface of the member. Since the inclination direction and inclination angle of the upper surface (823) and lower surface (824) have been explained above, a redundant explanation is omitted. Examples of materials for the insert member manufactured as the load-transmission member (820) include bearing steel or X65Cr13.

[0063] In the above block body molding step, sintered powder is fed into a molding die and pressure is applied to form a block body having a table portion and two leg portions, with concave portions formed on the inner sides of the two leg portions. In the above block body molding step, a non-loaded power hole and an assembly hole are also formed.

[0064] In the above insert sintering step, an insert member is inserted into the concave portion of the molded block body along the length of the concave portion, and the sintering powder forming the molded block body is heated. When the insert member is inserted into the concave portion of the molded block body, it is inserted so that the concave portions on both sides face each other and are oriented inward. The concave portion of the molded block body is also formed such that its cross-section is oriented inward in the width direction, similar to the final concave portion, and its vertical height is reduced, while the corner portions are formed in a rounded shape.

[0065] In the insert sintering step described above, in addition to sintering, the block body shrinks during the sintering process, and the insert member inserted into the concave portion is firmly bonded to the block body. In the insert sintering step described above, the insert member provided in the concave portion is also heated and cooled together, thereby heat-treating the insert member.

[0066] To explain the sintering process in the above insert sintering step as an example, an insert member is inserted into the concave part of the molded block body, maintained at 650°C for 30 minutes, maintained at 1,050 to 1,100°C for 1 hour, then cooled to 400°C for 1 minute, and naturally cooled to 20°C in air. Then, maintained in a temperature range of 160 to 180°C for 30 minutes, and naturally cooled again to 20°C in air.

[0067] In the above grinding step, the concave portion of the insert member is ground to form a load-carrying groove (821).

[0068] Before the grinding step above, a sizing step may be performed to recompress the block body (810) formed in the insert sintering step so that it is manufactured into a set dimensional range.

[0069] In the above insert sintering step, the block body (810) is sintered so that its hardness is lower than that of the load drive member (820). The hardness of the block body (810) is in the range of HRc58 to 59, which is lower than the hardness of the load drive member (820).

[0070] The assembly hole (814), assembly groove (812), and non-loaded electric hole (816) are formed by a projection provided in the mold during the molding step to form the assembly hole (814), assembly groove (812), and non-loaded electric hole (816), and the assembly hole (814), assembly groove (812), and non-loaded electric hole (816) are formed by the projection and then sintered through a sintering step.

[0071] As described above, the method for manufacturing a guide block for a linear guide according to the present invention involves manufacturing an insert member in a simple form, using this as an insert to manufacture the remaining block body (810) by sintering, and during the sintering process, the insert member is heat-treated and the load drive groove (821) is formed by grinding, thereby shortening the manufacturing time and significantly reducing the amount of raw material wasted during the manufacturing process.

[0072] The guide block of a linear guide and the method of manufacturing the same according to the present invention are simple to manufacture.

Claims

1. Includes a block body (810) and a load electric member (820); The above block body (810) includes a pair of leg portions (811) spaced apart in the width direction and a table portion (813) connecting the upper portions of the leg portions (811); A guide block for a linear guide, characterized in that a concave portion (818) is formed on the inner side facing the leg portion (811), extends along the length direction, and is open inwardly in the width direction, and the load driving member (820) is positioned in the concave portions (818) on both sides in the form of a rod extending in the length direction, and a load driving groove (821) is formed extending along the length direction on the surface facing inwardly in the width direction.

2. In claim 1, the concave portion (818) comprises an upper opening surface (8181) provided at the top, a lower opening surface (8182) provided at the bottom, and an inner surface (8183) provided on the inside; the angle (θ) formed by the upper opening surface (8181) and the lower opening surface (8182) is greater than 0°, so that the cross-section of the concave portion (818) is formed in a shape in which the vertical height decreases inwardly in the width direction, characterized in that it is a guide block for a linear guide.

3. In claim 2, the load driving member (820) comprises an outer surface (825) provided on the outer side in the width direction, an upper surface (823) provided on the upper side, and a lower surface (824) provided on the lower side; the outer surface (825) is in contact with the inner surface (8183) of the concave portion (818), the upper surface (823) is in contact with the upper opening surface (8181), and the lower surface (824) is in contact with the lower opening surface (8182); and the angle (θ) formed by the upper surface (823) and the lower surface (824) is greater than 0°, so that the cross-section of the load driving member (820) is formed in a shape in which the height decreases inward in the width direction, characterized in that it is a guide block for a linear guide.

4. A guide block for a linear guide according to claim 1, characterized in that the hardness of the load electric member (820) is greater than the hardness of the block body (810).

5. A method for manufacturing a guide block for a linear guide as described in any one of claims 1 to 4, wherein Including a step of manufacturing an insert member that serves as a load-carrying member, a step of forming a block body, a step of sintering the insert, and a step of grinding; A method for manufacturing a guide block for a linear guide, characterized in that an insert member manufactured in the above-mentioned insert member manufacturing step is inserted into a concave portion of a block body formed in the above-mentioned block body molding step, the block body is sintered in the above-mentioned insert sintering step, and the insert member inserted into the concave portion of the block body is ground in the above-mentioned grinding step to form a load transmission groove.

6. In claim 5, the insert member is manufactured in the step of manufacturing the insert member by drawing out a member having a cross-section including an upper surface, a lower surface, and an outer surface, and having a curved concave member portion on the opposite side of the outer surface, and cutting it to a set length; In the above block body molding step, sintered powder is fed into a molding die and pressure is applied, thereby molding a block body having a table portion and two leg portions, with concave portions formed on the inner sides of the two leg portions; A method for manufacturing a guide block for a linear guide, characterized in that, in the insert sintering step, an insert member is inserted into a concave portion of a molded block body, heated to sinter the extinguishing powder forming the molded block body, and the insert member provided in the concave portion is also heated and cooled to heat-treat the insert member.

7. A method for manufacturing a guide block for a linear guide according to claim 6, characterized in that, in the insert sintering step, the block body is sintered such that its hardness is lower than that of the insert member.

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