JP2010255725A - Method of bending guide rail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of bending guide rail which can solve the problem that conventional methods cannot manufacture a guide rail easily and certainly with a compact hardening device because the whole hardening device becomes large since the large hardening device is required to house the whole of guide rail. <P>SOLUTION: One side or both sides of width direction of guide rail 1, which has a cross-sectional profile thinner in thickness than in width and longer in length than in width, are subjected to continuous hardening in longitudinal direction. Then, the guide rail 1 is bent in thickness direction while keeping the guide rail hardened. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a guide rail bending method that requires quenching, and more particularly to a guide rail bending method in which bending is performed in a quenched state to form a predetermined shape.

  In general, as means for smoothly moving an object within a certain range, for example, a combination of a guide rail having a slidable portion and a rotating body that is movably engaged with the slidable portion and travels. A moving mechanism is known. In this case, if the weight on the rotating body side is large to some extent, the sliding surface wears due to the frictional force generated between the rotating body and the sliding portion. In order to prevent or suppress wear, the hardness of the slidable portion is increased and the slidable portion is hardened.

Japanese Utility Model Publication No. 5-96547 JP 2001-263348 A

  As a first example of a conventional apparatus using a guide rail, for example, there is one described in Patent Document 1. Patent Document 1 describes a linear guide mechanism in which a mounting base member can move along a linear guide member. The linear guide mechanism according to Patent Document 1 includes a linear guide member, a rotating body, and a mounting base member, and the rotating body is attached so as to be fitted on both sides of the linear guide member in a pair. The member is movable along the linear guide member. A case member is provided that is fixed to the mounting base member and is formed with an accommodating portion that is open on the side facing the linear guide member, and the rotating body is accommodated in the accommodating portion and supported by the support shaft. It is a feature.

  According to the linear guide mechanism having such a configuration (hereinafter referred to as “first conventional example”), the necessity of learning in assembly can be improved, and the rigidity has also been improved. The effect that the degradation of the guidance accuracy by it can be prevented is anticipated.

  Further, as a second example of a device using a conventional guide rail, for example, there is a device described in Patent Document 2. Patent Document 2 describes an apparatus for easily and inexpensively manufacturing a linear or curved guide device. The linear or curved guide device according to Patent Document 2 includes a track rail in which rolling surfaces of a plurality of rolling elements are formed along a longitudinal direction, and a movable body that is assembled to the track rail via a large number of rolling elements. And a slide member which can be guided freely. The track rail is formed in a flat and substantially rectangular shape having a vertical cross section perpendicular to the longitudinal direction and having a width wider than the height, and the height of the cross section of the track rail is smaller than the depth of the recess of the slide member. The track rail is fixed to the mounting surface of the mounting base and used.

  According to the linear or curved guide device having such a configuration (hereinafter referred to as “second conventional example”), drawing can be easily performed, unnecessary heat treatment can be omitted, and the track rail can be simplified. The effect of being able to be manufactured is expected.

  However, in both the above-described first and second conventional examples, a necessary portion is subjected to quenching treatment (for example, “ball rolling groove” in the case of the second conventional example). At the time of quenching, it was not performed to quench the entire target product and quench only a part of the product. Therefore, a quenching furnace larger than the product (for example, an induction hardening device) is required, and a product larger (longer) than the induction quenching device cannot be quenched.

  The problem to be solved is that in the conventional guide rail bending method, the quenching apparatus requires a quenching furnace of a size that can accommodate the entire guide rail, so the entire quenching apparatus becomes large and small. It is a point that a guide rail cannot be manufactured easily and reliably by this hardening apparatus.

  The guide rail bending method of the present application includes quenching continuously in the length direction on at least one side in the width direction of the guide rail having a cross-sectional shape thinner than the width and longer than the width. Then, the main feature is that the guide rail is bent in the thickness direction while being quenched.

  According to the guide rail bending method of the present application, the guide rail can be bent into a predetermined shape by applying a bending process in a quenched state. Therefore, a guide rail having a predetermined hardness and curved into a predetermined shape can be manufactured very simply and quickly by quenching treatment.

It is block explanatory drawing explaining the outline of the bending method of the guide rail of this invention. FIG. 2A is an end view and FIG. 2B is a plan view showing a hexagonal guide rail showing a first embodiment of a cross-sectional shape of a guide rail suitable for use in the guide rail bending method of the present invention. FIG. 3A is an end view, and FIG. 3B is a plan view, illustrating a second example of a cross-sectional shape of a guide rail suitable for use in the guide rail bending method of the present invention. FIG. 4A is an end view, and FIG. 4B is a plan view, showing an oval guide rail showing a third example of a cross-sectional shape of a guide rail suitable for use in the guide rail bending method of the present invention. FIG. 5A is an end view, and FIG. 5B is a plan view, showing an ∞-shaped guide rail showing a fourth example of the cross-sectional shape of the guide rail suitable for use in the guide rail bending method of the present invention. It is explanatory drawing which shows the 1st Example of the usage condition of the guide rail produced using the bending method of the guide rail of this invention. It is explanatory drawing which expands the principal part of FIG. 6 and demonstrates a structure. It is explanatory drawing which shows the 2nd Example of the usage type of the guide rail produced using the bending method of the guide rail of this invention. It is explanatory drawing which expands and shows the principal part X of FIG.

  Quenching is performed continuously in the length direction on at least one side in the width direction of the guide rail, and then the guide rail is curved in the thickness direction while being quenched. As a result, it is possible to easily and quickly manufacture a guide rail having an appropriate curved form by bending it by bending or twisting it while it is in a hardened state.

  FIG. 1 is a block diagram for explaining a guide rail bending method of the present invention. 2-5 is a figure explaining the example of embodiment of the form of the guide rail 1 suitable for using for the bending method of the guide rail of this invention. First, with reference to FIG. 2 to FIG. 5, a preferred guide rail configuration will be described.

  2A and 2B show a first example of a guide rail configuration, and the guide rail 1 has a hexagonal cross-sectional shape. That is, the guide rail 1 has a cross-sectional shape (W> T) whose thickness T is thinner than the width W, and a long bar material whose length L is sufficiently longer (L> W) than the width W. It is formed as. Further, the guide rail 1 has sliding parts 5 that protrude in a mountain shape like a tapered triangle on both sides in the width direction. Thereby, the cross-sectional shape of the guide rail 1 is formed as a hexagon which is long in the width direction as a whole.

  The apex angle α of the sliding portion 5 of the guide rail 1 is preferably about 70 degrees when used in combination with a traveling wheel described later. However, the magnitude of the apex angle α is not limited to this example, and an appropriate angle can be set, which may be 70 degrees or more, and may be 70 degrees or less. . Further, in this embodiment, the example in which the apex angles α on both sides in the width direction are set to the same angle has been described, but the apex angles on both sides may be set to different angles (α and β, α ≠ β). Of course. Note that the tip of the apex angle α may be formed as a flat surface having an appropriate width, or may be formed as a curved surface portion having an appropriate curvature radius. At least one of the sliding parts 5 is quenched, and then the whole or part of the length direction is curved in the thickness direction. 2B is an insertion hole for screwing the guide rail 1, and is provided at a substantially central position in the width direction with a suitable interval in the longitudinal direction.

  3A and 3B show a second example of the form of a guide rail, and the guide rail 1 has a rectangular cross-sectional shape. That is, the guide rail 2 has a cross-sectional shape (W> T) whose thickness T is thinner than the width W, and a long bar material whose length L is sufficiently longer (L> W) than the width W. It is formed as. Thereby, the cross-sectional shape of the guide rail 2 is formed as a rectangle long in the width direction as a whole.

  On both sides of the guide rail 2 in the width direction, quadrangular sliding portions 6 are set with both corners being right angles. At least one of the sliding parts 6 is quenched, and then the whole or part of the length direction is curved in the thickness direction. Reference numeral 9 shown in FIG. 3B is an insertion hole for screwing the guide rail 2, and a plurality of holes 9 are provided at an approximate center in the width direction and at an appropriate interval in the longitudinal direction.

  FIG. 4A and FIG. 4B show a third example of the form of a guide rail, and this guide rail 3 has an oval cross-sectional shape. That is, the guide rail 3 has a cross-sectional shape (W> T) whose thickness T is thinner than the width W, and a long bar material whose length L is sufficiently longer (L> W) than the width W. It is formed as. Furthermore, the guide rail 3 has the to-be-slid part 7 which protruded in the semicircle on both sides of the width direction. Thereby, the cross-sectional shape of the guide rail 3 is formed as an oval long in the width direction as a whole.

  Quenching is performed on at least one of the sliding parts 7 of the guide rail 3, and then the whole or a part of the length direction is curved in the thickness direction. Reference numeral 9 shown in FIG. 4B is an insertion hole for screwing the guide rail 3, and a plurality of holes 9 are provided at an approximate center in the width direction and at an appropriate interval in the longitudinal direction.

  FIG. 5A and FIG. 5B show a fourth embodiment in the form of a guide rail, and this guide rail 4 has an ∞-shaped cross-sectional shape. That is, the guide rail 4 has a cross-sectional shape (W> T) having a thickness T smaller than the width W, and a long bar having a length L sufficiently longer than the width W (L> W). It is formed as. Further, the guide rail 4 has sliding portions 8 projecting in a semicircular shape on both sides in the width direction, and the thickness of the intermediate portion in the width direction is set to be gradually thinner than other portions. Thereby, the cross-sectional shape of the guide rail 4 is formed as a substantially ∞ shape that is long in the width direction as a whole.

  Quenching is performed on at least one of the sliding portions 8 of the guide rail 4, and then the whole or a part of the longitudinal direction is curved in the thickness direction. Reference numeral 9 shown in FIG. 5B is an insertion hole for screwing the guide rail 4, and a plurality of holes 9 are provided at an approximate center in the width direction and at an appropriate interval in the longitudinal direction.

  As a material of the guide rails 1 to 4 having such a configuration, for example, heat-treated carbon alloy steel (SCM435) is suitable. However, the material of the guide rail according to the present invention is not limited to this embodiment, and any material that can be quenched can be applied. Of course, the cross-sectional shape of the guide rail is not limited to that of the above embodiment. That is, in the embodiment shown in FIGS. 2 to 5, the shapes on both sides in the width direction are set to the same shape, but they may be set to different shapes, for example, the shapes shown in FIGS. Or it can also be configured as a combination of other known shapes.

  As shown in FIG. 1, a guide rail bending apparatus for carrying out the present invention performed using such guide rails 1 to 4 includes an induction hardening apparatus 10 and a press apparatus 11. The induction hardening apparatus 10 has a coil that is placed along the sliding portion 5 (6 to 8) that is a position to be hardened of the guide rail 1 (2 to 4) that is the object to be hardened. By passing a high-frequency current (for example, 1 to 500 kHz) through the coil, the surface layer of the material is rapidly heated by Joule heat of the induced eddy current, and after reaching the quenching temperature, quenching and quenching is performed. is there.

  In this case, it is not necessary to accommodate the entire guide rail 1 (2 to 4) in the induction hardening device 10, and the high frequency starts from one end of the sliding portion 5 and moves toward the other end while moving the guide rail 1. Induction hardening can be continuously performed by sequentially moving the quenching position. Therefore, an induction hardening apparatus larger than the length of the guide rail 1 is not required, a small induction hardening apparatus can be used, and a conventional induction hardening apparatus can be used as it is. In addition, the part which exists between the sliding parts 5 and 5 of the both sides of the guide rail 1 (2-4) is a part which is not hardened or has little influence of hardening, and the hardness of the part is not so much It is not high.

  Next, the guide rails 1 (2 to 4) in which the sliding parts 5 (6 to 8) are quenched by the induction hardening device 10 are supplied to the press device 11. This press apparatus 11 performs a bending process using a press roller etc. on the guide rail 1 (2-4) which is a workpiece. In this case, the sliding parts 5 and 5 of the guide rail 1 (2 to 4) are hardened by being hardened, but the part between the sliding parts 5 and 5 is hardened. It is not soft and is in a relatively soft state. For this reason, the guide rail 1 (2 to 4) can be bent even with a relatively small pressing force, and highly accurate bending can be realized.

  FIG. 6 is an explanatory diagram of a guide rail system showing a first example of usage of the guide rail 1. The guide rail system 20 includes an oval guide rail unit 21 connected endlessly and a number of traveling units 22 held movably by the guide rail unit 21.

  The guide rail unit 21 includes two straight straight guide rails 1A extending linearly and two curved guide rails 1B forming a semicircular shape extending in a curved shape. The two linear guide rails 1A and 1A are installed so as to face each other with a predetermined interval, and the curved guide rails 1B are respectively disposed between both ends of the two linear guide rails 1A and 1A. As a whole, an oval frame is formed. A connecting plate 23 is disposed at a connecting portion between the straight guide rail 1A and the curved guide rail 1B, and adjacent guide rails 1A and 1B are connected and fixed integrally with each other through the connecting plate 23.

  The traveling unit 22 includes four traveling wheels 25 that are rotatably contacted with the sliding portions 5 of the linear guide rail 1A and the curved guide rail 1B, and a traveling that rotatably supports the four traveling wheels 25. It is comprised from the board 26. FIG. The traveling wheel 25 includes a rotating body 28 having a V-groove 27 corresponding to the sliding portion 5 of the guide rails 1A and 1B, a support shaft 29 that rotatably supports the rotating body 28, and a threaded engagement with the support shaft 29. Thus, a nut 31 and a washer 32 for fixing the traveling wheel 25 to the traveling plate 26 are provided.

  The travel plate 26 of the travel unit 22 is provided with four insertion holes 33 through which the support shafts 29 of the travel wheels 25 are inserted. The four insertion holes 33 are set at positions corresponding to the dimensions of the linear guide rail 1A and the curved guide rail 1B. Note that the two traveling wheels arranged on one side of the straight guide rail 1A and the curved guide rail 1B are provided with the position of the support shaft 29 slightly decentered, and the guide rails 1A, 1B and The gap is adjustable.

  FIG. 8 is an explanatory view of a guide rail system showing a second example of the usage pattern of the guide rail 1. This guide rail system 40 is applied to an open / close door mechanism that opens and closes a semicircular opening 42 of a circular chamber 41 having a cylindrical space. The circular chamber 41 has a circular ceiling part 45 and a floor part 46, a semi-cylindrical side wall part 47 surrounding the ceiling part 45 and the back side of the floor part 46, and a left and right opening and closing a front opening 42 in the left-right direction. Open / close doors 44 and 44. Each opening / closing door 44 is provided with a handle 48 for opening / closing operation.

  Guide rail units 51 formed in a circular shape so as to surround the outer periphery thereof are attached to the ceiling portion 45 and the floor portion 46 of the circular chamber 41, respectively. The guide rail unit 51 is configured by, for example, four curved guide rails 1B formed by curving in an arc shape. Each open / close door 44 is bent to correspond to the bending state of the curved guide rail 1B. A connecting plate 52 extending from one end to the other end in the left-right direction (width direction) is fixed to the upper and lower ends of each open / close door 44. A necessary number of traveling wheels 25 (for example, two in total in this embodiment, two in each of the left and right directions) are attached to necessary portions of each connecting plate 52.

  As shown in FIG. 9, the curved guide rail 1 </ b> B is screwed with a fixing screw 55 using a boss portion 54 provided on the skirt portion 45 a of the ceiling portion 45. The connecting plate 52 to which the traveling wheels 25 that are engaged with the curved guide rail 1 </ b> B are attached has a presser plate 56. A shielding plate 57 is held between the presser plates 56. The sandwiching plate 57, the upper and lower connecting plates 52, and the pressing plate 56 constitute an opening / closing door 44.

  According to this embodiment, one open / close door 44 is vertically paired by a total of eight traveling wheels 25 including four traveling wheels 25 arranged in the upper portion and four traveling wheels 25 arranged in the lower portion. The guide rail units 51 and 51 are supported so as to run freely. Therefore, the left and right open / close doors 44 and 44 can be smoothly opened / closed while being rotated in the left / right direction by the guide of the guide rail unit 51.

  As described above, according to the present invention, the guide rail can be bent into a predetermined shape by applying a bending process in a quenched state. Therefore, it is possible to manufacture a guide rail having a predetermined shape by bending it while ensuring a predetermined hardness by a quenching process, extremely easily and quickly.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example in which the sliding portions 5 and 5 on both sides of the guide rail 1 are subjected to quenching has been described, but it is needless to say that only one of them may be subjected to quenching.

  1, 2, 3, 4 ... guide rail, 1A ... straight guide rail, 1B ... curved guide rail, 5, 6, 7, 8 ... sliding part, 10 ... induction hardening device, 11 ... press device, 20, 40 ... Guide rail system 21, 51 ... Guide rail unit, 22 ... Travel unit, 25 ... Travel wheel, 26 ... Travel plate, 27 ... V groove, 28 ... Rotating body, 29 ... Support shaft

Claims (5)

The cross-sectional shape is thinner than the width, and at least one side in the width direction of the guide rail having a length longer than the width is continuously quenched in the length direction, and then the quenched state. The guide rail bending method, wherein the guide rail is bent in the thickness direction. The guide rail bending method according to claim 1, wherein the quenching is performed by an induction quenching apparatus. The guide rail has a hexagonal cross-sectional shape having sliding portions protruding in a mountain shape on both sides in the width direction,
The guide rail bending method according to claim 1, wherein at least one of the sliding portions on both sides in the width direction is quenched. The guide rail has an oval cross-sectional shape having a sliding portion protruding in a semicircular shape on both sides in the width direction,
The guide rail bending method according to claim 1, wherein at least one of the sliding portions on both sides in the width direction is quenched. The guide rail bending method according to claim 1, wherein the hardness of the quenching is Rockwell hardness HR55 or more.

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