JPH06101203A - Automatically finishing device for welding section of rail - Google Patents

Abstract

PURPOSE:To promote working efficiency by bearing a grinder capable of pitching in the normal direction of the surface of a rail on a frame in a displaceable manner and in a fixable manner. CONSTITUTION:When a frame 20 is moved along a track 11 of a guide 10, and a sub-frame 40 is combined with a roller 60 along a non-welding section of a rail A and is moved in the direction of the center line C. A grinder 30 is moved along the track 11 and, at the same, a welding section of the rail A is ground in the same profile as that of the non-welding section while moving the grinder 30 combined with the sub-frame 40 in the same direction. Whenever the grinder 30 is moved from one end to the other end of the track 11 together with the frame 20 to grind one stage of work, after the grinder 30 is driven forward a little to the center of the rail A by a pitching means, grind is made again. In addition, a certain number of stages of work are repeatedly ground to eliminate excess metal of the welding section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an apparatus for automatically removing a welding surplus from a welded portion of a railroad rail (a portion connected by welding for lengthening the rail) by grinding. is there.

[0002]

2. Description of the Related Art In recent years, railroad rails are often lengthened (longer rails) for the purpose of speeding up vehicles, improving riding comfort and reducing noise. The lengthening of the rail is performed, for example, by welding a fixed-length rail having a length of 25 meters to 1 km or more by welding.
Welding of rails for lengthening can be carried out in factories (rail manufacturing plants) up to a maximum length of about 200 meters, but if it is longer than this, it can only be carried out at the site where the rails are laid.

[0003] The work of connecting rails at a laying site is a tough work that is carried out at midnight when there is little traffic of vehicles, regardless of the weather. Above all, it is necessary for the operator to finish the welded portion by grinding. It is said that this is a particularly heavy work. Regarding welding, automation (or semi-automation) has already been realized by various methods such as gas welding, thermite method, pressure welding method, etc., but after welding (or even after a process called punching) To remove meat by grinding and finish smoothly on the head of the rail (the part from the uppermost horizontal tread to the vertical surfaces on both sides where the wheel and its brim can contact) without unevenness or steps This is because, at present, the manual work (physical work) of a person with considerable skill is indispensable. In other words, in grinding work, an operator with a grinder presses a rotating grindstone against the surface of the welded part of the rail, and the grinder moves back and forth in small steps forward and backward and left and right so that it does not become a recess by cutting too much a specific part. This is done by moving to the whole section.

[0004] Incidentally, as a past document proposing a rail grinding device, there are Japanese Patent Publication No. 63-52167 and Japanese Patent Publication No. 51-45835.

[0005]

In spite of the several proposals regarding the grinding apparatus as described above,
Up to now, the reason for actually finishing grinding the rail welded portion manually is that none of the conventional devices has the required performance at the rail laying site. For example, the automatic finishing device described in the former one of the above publications is one in which a trolley equipped with a polishing belt is placed on a rail, and an operator moves the trolley back and forth and tilts the rail head to polish the rail head. However, b) it is difficult for the operator to leave the device for operation, b) it is difficult to grind the vertical planes on both sides of the rail head, and c) it is a method using a grinding belt, so it is necessary to remove a large amount of excess meat. There is an inconvenience that it takes time. The device of the latter publication is a device that moves four sets of grindstones around the rail (including the lower part) to perform grinding, so d) it is extremely difficult to apply it to the laid rail. ) It is not easy to change the place of use (remove the device to another weld) at the rail laying site because of the large number of grindstones, etc. Since the switches are used one after another in sequence, it is not preferable because a complicated and expensive control means must be provided or an operator must operate the device without leaving the device.

On the other hand, as described above, the manual method is not efficient as it requires skill and hard labor.

An object of the present invention is to provide an apparatus capable of automatically grinding and finishing a welded portion at the rail laying site and the like without the above inconvenience, and having excellent efficiency. is there.

[0008]

According to a first aspect of the present invention, there is provided an automatic rail welding portion finishing apparatus for finishing a welding portion by grinding and removing a welding surplus on a rail surface (such as a head). The device described in 1) allows the frame to move on a track corresponding to the profile (outer shape of the cross section) of the rail head (above), and 2) in the frame, a) the outer peripheral surface of the rotary grindstone. A grinder held in contact with the welded portion and held so that it can be pitch-fed in the normal (perpendicular) direction of the rail surface; b) means for supporting the grinder so that it can be displaced and fixed in the normal direction; and c) the method. And means for detecting the amount of said displacement of the grinder in the line direction.

This device is, for example, as described in claim 2, 3) means for keeping the angle of the frame with respect to the normal line of the rail surface constant during the above movement, and the direction of the normal line to the frame. A subframe that is movable and is pushed toward the rail by the pushing means.4) In the subframe, the grinder of a) above,
Only the longitudinal position of the rail differs from the support means in b), the detection means in c), and the contact point with the grindstone (strictly speaking, the deviation of the thickness of the welding surplus is included, It is preferable to attach a copying tool (pin, roll, ball, or the like) that is pressed against the rail surface at a non-welded portion in the vicinity of the head.

The present apparatus further has the highest welding surplus (the protrusion amount of the surplus with respect to the original profile of the rail is the highest) based on the output of the control means according to claim 3, 5) the detection means of the above c). It is preferable to provide a control means for specifying the (larger) portion and for defining the moving range of the frame along the track so as to sequentially widen the grinding range starting from the region including the specified portion.

Further, as described in claim 4, in order to be able to grind the welding surplus at the bottom of the rail (bottom surface) as well, 6) In addition to the track of the above 1), the rail bottom transverse line (on the bottom surface). , A line that is perpendicular to the longitudinal direction of the rail) and a track that is parallel to the above, so that a frame other than the above moves, and the frame has the same structure as the above, that is, the structure of 2) or 3) or later. It is more preferable to apply the configuration of.

[0012] As described in claim 5, 7) the track of the above 1) according to the profile of the rail head,
It may be formed on a guide that is fixed to the rail so as to be repositionable.

[0013]

In the automatic finishing apparatus of the present invention, the grinder moves on the track along with the frame with the outer peripheral surface of the rotary grindstone contacting the welded portion of the rail head (see a) in 2) above. Do (1) and 2) above). Since the track corresponds to the profile of the rail head, the grinder rotates the grindstone while it is fixedly supported on the frame (b) and moves with the frame to automatically weld the weld. Grinding and gradually making the surface shape closer to the original rail head profile. However, since it is impossible to finish the grinding finish by one stroke (one movement) along the track, the grinder advances the grinding by gradually feeding the pitch (a) for each stroke.

Pitch feed is a method in which the grindstone is gradually brought closer to the rail surface (that is, the height of the grindstone from the rail surface is gradually reduced), but the first stroke (first pass) that is the source of the pitch feed. ), It is appropriate to determine the height of the grindstone according to the height of the welding surplus. The height of the surplus varies from weld to weld, but if the position of the grindstone in the first stroke is too high, the grinding wheel does not come into contact with the surplus during that stroke, so grinding is not performed. This is because when loss occurs and the grindstone is low on the contrary, the cut (cutting) becomes too deep and the grindstone or the grinder may be defective. It is also necessary to pay attention to the setting of the final height of the grindstone so that the pitch feed does not proceed too far and the height of the welded portion falls below the original rail surface.

With respect to such a point, in the apparatus of the present invention, the height of the grindstone related to the feed pitch toward the rail is set to, for example, the following procedure before starting the grinding based on the means of b) and c). Therefore, it can be determined. That is, first, a grindstone is brought into contact with the rail surface of the non-welded portion, and the grinder in an undriven state is displaceable by the supporting means of b) and moves along with the frame / subframe along the track. The amount of displacement of the grinder detected by the means c) during this period corresponds to data representing the original shape of the rail surface. Then, a grindstone is applied to the surface of the welded portion, and the grinder is moved in the same manner without being rotationally driven. At this time, the amount of displacement of the grinder, which is also detected by the means of c), represents the distribution of the excess thickness of the weld. By comparing the amounts of displacement of the grinder that were known for these non-welded parts and welded parts, the height of the surplus (the difference from the original rail surface)
It is possible to determine the height of the grindstone in the first movement stroke of the frame or the like, and finally to which height the pitch of the grindstone is fed. In this device, since the grindstone itself is used as a contact for the non-welded portion and the welded portion, even if the grindstone is worn in advance, it is not necessary to actually measure the wear amount or to correct the wear amount.

In the case of the apparatus of claim 2, the rail welding portion can be ground and finished as follows. That is, (a) When the height of the grindstone and the amount of pitch feed are determined for the rail welded portion by the above-mentioned procedure and the apparatus is started, the frame moves on the track and is rotationally driven as in the case of claim 1. Grinder grinds the weld. However, in the case of the apparatus of claim 2, the angle of the frame is kept constant with respect to the normal line of the rail surface as in 3), and the sub-frame moves in a constant direction in the frame, so that the normal direction So that you can move the
A grinder etc. is attached as in 4). Then, this device grinds excess thickness while following the outer shape of the rail head portion in the non-welded portion close to the welded portion. The sub-frame, the non-welded portion of the copying tool described in 4) above (the position of the rail in the longitudinal direction is different from the contact point between the grindstone and the rail,
While pressing against the point where the position in the circumferential direction corresponds,
Since it moves along with the frame along with the frame, the movement of the subframe and the grindstone follows the outer shape of the non-welded portion of the rail that the copying tool follows. Therefore, the device can perform proper grinding on the weld even if the track does not correspond exactly to the actual rail profile. Since the pitch feed means is also provided in the sub-frame and the grinder can be fed by an appropriate amount, it is possible to finish the grinding of the welded portion by a plurality of strokes until it matches the outer shape of the non-welded portion.

(B) When finishing is completed for one welded portion, the operation is stopped, the apparatus or rail is moved, and the above operation is repeated for another welded portion. It should be noted that if the grindstone wears even during grinding, it is recommended to gradually shift the position of the grinder in the frame toward the rail to correct it. Even if it is left with, only a slight amount of hand finishing margin remains, and the burden on the operator does not become heavy. Of course, the grindstone should be replaced accordingly.

According to the third aspect of the invention, the idling time of the grindstone is further reduced as compared with the first or second aspect of the invention, and the rail welded portion can be efficiently finished. The height of the grindstone in the first stroke can be appropriately set by the device of claims 1 and 2 as described above, but if the grinder is moved to the entire rail head area at that height, excess of the grindstone will occur. In many cases other than the highest point, there are many parts where the grindstone spins idle. However, in the case of the device of claim 3, based on the control means of 5) above, only the vicinity of the highest point is initially ground and the grinding range is gradually expanded. I have less time to do it. Therefore, for the same welded portion, it is possible to finish grinding in a short time.

The apparatus of claim 4 can grind the rail head and grind the welding surplus at the bottom of the rail in parallel. In addition to the track of 1) along the rail head, as described in 6), it has a track parallel to the bottom transverse line of the rail, and a frame different from that of 1) moves on the track, This is because a grinder or the like installed in the frame also has the same function as the above.

In the apparatus according to the fifth aspect, the guide of 7) can be fixed and removed at an appropriate position on the rail. Therefore, at the rail laying site, when finishing of one welded portion is completed, the guide can be fixed at an appropriate position for another welded portion and the apparatus can be operated in the above-described manner. Since this device is a simple and lightweight device consisting of such a guide, frame, grinder, etc., if the entire device is integrated with the guide, it is easy to move between welding parts, fix, and prepare for operation. it can.

[0021]

1 to 4 show a first embodiment of the present invention.
1 is a front view of the automatic finishing device 1 taken along a plane (transverse section) perpendicular to the longitudinal direction of the rail A, FIG. 2 is a plan view of the device 1, and FIG. 3 is a side view of the device 1. In each case, a part is broken away. Further, FIG. 4 is a cross-sectional view of the head portion Ab of the rail A to be finished. The device 1 is shown in FIG.
It is fixed so that it can be deposited on the rail A as shown in Fig. 2, and is movable with respect to the head part Ab (the uppermost tread surface and both side surfaces shown in Fig. 1) of the welded portion Aa (Fig. 2) connecting the rail A. The grinding wheel 31 is used for grinding.

In summary, the device 1 is constructed as follows. That is, a) First, the U-shaped brackets 3 for fixing the device 1 on the rail A are provided on both ends of the base 2 that integrates the entire device 1 as shown in FIGS. 1 and 2. .
In order to make the relative positional relationship between the device 1 and the rail A always constant, the bracket 3 has a rail A as shown in FIG.
The plate 3a corresponding to the upper surface of the and the fixing bolt 3b were attached. Further, the bolts 4 hold the rail A so that the bracket 3 does not move at that position.

B) A guide 10 having a track 11 surrounding the head portion Ab of the rail A is provided integrally with the bracket 3 and the base 2 as shown in FIG. This orbit 11
Is for guiding the movement of a frame 20 which will be described later within a plane perpendicular to the longitudinal direction of the rail A, and the rack portions 12 and 13 are formed inside and outside as a portion which directly guides the movement. . The rack parts 12 and 13 as the track 11 are
Both of them are formed with tooth profiles of the same size (module), and their contours correspond to the profile of the head Ab of the rail A. That is, the rack 12 is attached to the straight line portion of the uppermost portion and the vertical portions on both sides in the cross section of the rail A.
13 has a straight contour, and the rack portions 12 and 13 are formed as concentric arcs with the center of curvature as the center for the curved (arc) parts at both corners. The radius ratio of the pitch circles of the rack portions 12 and 13 in this arc portion is 2: 1.

C) A frame 20 formed in the shape of an open rectangular frame is attached to the guide 10 so as to surround a part of the guide 10 (see FIG. 2), and the frame 20 is self-propelled. Servo motors 23 and 24 and gears (pinions) 21 and 22 are provided. That is, as shown in FIG. 1, the rack portion 1 which is the track 11 on the guide 10.
The gears 21 and 22 are meshed with the gears 2 and 13, respectively, and these are driven by motors 23 and 24 so that the frame 20 moves together with the gears 21 and 22 in accordance with the contours of the rack portions 12 and 13. Note that FIG.
And reference numerals 25a, 25b, 25c, 25 in FIG.
Reference numerals d and 25e denote rollers arranged on the frame 20 in contact with the guide 10 and the track 11 so that the frame 20 does not tilt.

D) The air type grinder 30 is attached to the frame 2
0 (details of the mounting relationship will be described later), and the head Ab of the rail A is ground while the grinder 30 moves along the track 11 together with the frame 20. The rotating grindstone 31 of the grinder 30 has a cylindrical shape, and the generatrix of the shaft center and the outer peripheral surface is directed in the longitudinal direction of the rail A as shown in FIG. The Ab always contacts in parallel with the longitudinal direction of the rail A. In addition, the radius of the grindstone 31 is smaller than the height from the ground surface to the lowermost portion of the head Ab so that the lowermost portion of the head Ab can be ground in that posture.

The automatic finishing device 1 can advance the grinding by feeding the grinder 30 (grinding stone 31) little by little in the direction of the cutting depth and repeating the above-mentioned movement (stroke). Copy grinding can also be performed with reference to the non-welded portion near the welded portion Aa of the rail A. This is possible only because the frame 20 has a considerable structure, but the frame 20 and the like will be described in detail below.

E) In order to accurately and uniformly perform the above pitch feed and profile grinding on the head Ab of the rail A, the frame 20 to which the grinder 30 is attached is
Since it is desirable to maintain a constant posture with respect to the ground surface (portion being ground) of b, first, the means for that is used as the frame 2
It is set to 0. That is, the rotation speed of the gears 21 and 22 meshing with the rack portions 12 and 13 is set to the servo motor 23.
The attitude of the frame 20 is controlled by controlling each at 24. In this example, it is assumed that the center line c of the frame 20 as viewed in cross section as shown in FIG. 1 is kept at a right angle to the grinding surface (that is, on the normal line of the grinding surface), and therefore the diameter of the outer gear 21 (and hence the tooth). (The number also) is twice that of the inner gear 22, and the rotation speed ratio between the two is 1: 2 in the straight part of the rack parts 12 and 13, and in the arc part (having the above-mentioned pitch circle diameter ratio). It is controlled to be 1: 1. For example, if a rotation amount detector (encoder) is attached to each of the motors 23 and 24, and the rotation speed is switched as described above when the motors 23 and 24 rotate at a constant speed from the end of the track 11. The posture control described above is possible.

F) The frame 20 so that the profile grinding can be performed.
A grinder 30 and the like are attached to the above through a subframe 40 shown in FIG. That is, the subframe 40
Is first movably attached to the guide rail 26 on the frame 20 via a linear guide 41, and is attached to the rail A.
An air cylinder 42 is provided on the frame 20 as a means for pushing it toward the side. The guide rail 26 is parallel to the center line c of the frame 20 described above (and thus parallel to the normal line described above).
Therefore, the moving direction of the subframe 40 is perpendicular to the ground surface on the rail A. A copying roller 60 is provided at the tip of the sub-frame 40. The copying roller 60 is pressed against the rail A by the elastic force of the air cylinder 42, but the contact point between the roller 60 and the rail A is located at a position slightly different from the welding portion Aa in the longitudinal direction of the rail A as shown in FIG. It is a point where the contact point between the grindstone 31 and the rail A coincides with the circumferential position at different non-welded portions when viewed from the direction of FIG. The sub-frame 40 moves together with the copying roller 60 tracing the non-welded portion of the rail A in the direction of the center line c, and the grinder 30 moves in the same direction together with the sub-frame 40 (also the track 11). Since the grinding is performed (while moving according to the above), the welded portion Aa can be ground to the same profile as the non-welded portion.

G) In order to enable grinding by pitch feed of the grinder 30, a grinder support bracket 55 is provided on the sub-frame 40 via pitch feed means 50. That is, the bracket 55 is different from the sub-frame 40 described above in that
It is attached via a linear guide 51, and is fed by the action of the feed motor 52 and the feed screw 53 together with the feed nut 54 in the same direction as the center line c. A holder 56 or the like is attached to the end of the bracket 55, and the grinder 30 is held by the holder 56. Guide 1
Every time the grinder 30 moves from the end of 0 (track 11) to the other end together with the frame 20 and grinds for one stroke, the motor 52 is rotated by a predetermined amount to rotate the bracket 5
If the grinder 30 is sent out a little closer to the center of the rail A together with 5, the surplus of the welded portion Aa can be removed by repeating several steps. Motor 5
In the stopped state of 2, the bracket 55 is attached to the subframe 4
Since the position at 0 is held and follows the movement of the copying roller 60, the above-described copying grinding is also performed in each stroke.

H) On the bracket 55, there is provided a reciprocating means 70 for reciprocating the grinder 30 together with the holder 56 in the longitudinal direction of the rail A (that is, the horizontal direction in FIG. 2). This is because grinding is performed on the welded portion Aa while moving the grindstone 31 in the width direction (that is, while performing so-called weaving). The reciprocating means 70 includes a drive source such as a motor 71, a speed reducer 72, a crank 73, and a connecting rod 74, a connecting piece 75 and a moving frame 76 which are parts on the holder 56 driven by them, and The holder 56 is moved to the rail A via the moving frame 76.
It is configured by a guide frame 77 and the like which is movably supported in the longitudinal direction. Thereby, in the device 1, the grinder 30 together with the moving frame 76 and the holder 56 can reciprocate tens of reciprocations per minute in the longitudinal direction of the rail with a stroke of tens of mm.

I) Prior to grinding, the surface of the welded portion Aa is traced with an undriven grindstone to detect the height of the excess thickness of the welded portion Aa, so that the above-mentioned moving frame can be ground efficiently. The grinder 30 is attached to the unit 76 via a surplus wall height detecting mechanism 80 as described below. That is, the frame 81 integrated with the holder 56 is attached to the moving frame 76 via the linear guides 82 and 83 so that the grinder 30 can be displaced and fixed in the direction of the normal line (center line c), and then in the same direction. With the expanding and contracting spring 85,
An air cylinder 86 for fixing the frame 81 and a linear sensor 88 that is a means for detecting the amount of displacement of the grinder 30 in the same direction are installed. The grinder 30 is supported on the moving frame 76 so as not to be displaced in the same direction when the cylinder 86 is extended by air pressure. However, when the cylinder 86 is expandable and contractible without applying pressure, the grinder 30 resists the spring 85. It is displaceable in the direction of the normal line, and the displacement is detected by the linear sensor 88. The linear sensor 88 is connected to a control means (not shown, the function of which will be described later) for storing the output signal and gradually expanding the grinding range based on the output signal.

In the automatic finishing device 1, the head Ab of the rail A (see FIG. 4) can be efficiently ground in the following manner based on the configuration of the above i). That is, first, the undriven grinder 30 in which the grindstone 31 is brought into contact with the rail surface of the non-welded portion is moved along the track together with the frame / subframe so as to be displaceable in the direction of the normal line. The output of the linear sensor 88 is stored in the control means.

Subsequently, the grindstone 31 is applied to the surface of the welded portion, and similarly moved without driving the grinder 30,
The output of the linear sensor 88 is input to the control means.

By comparing the output of the linear sensor 88 in each of the above cases, the control means knows the distribution of the height h of the extra thickness.

The control means determines the height of the grindstone in the first movement stroke based on the highest value of the surplus wall height h, and based on the data on the non-welded portion, Decide whether to send the whetstone to the height (pitch feed).

Further, in the control means, the data regarding the height h of the surplus is provided to the five sections p to t as shown in FIG. 4 along the periphery of the head Ab (not limited to this, other sections may be used. ) And find the maximum value of the surplus within each category.

At the same time, the control means determines which of the five divisions to start grinding and in what order the grinding range is expanded. For example, when the maximum value of the surplus in each segment is: segment p: 3.30 mm, segment q: 3.92 mm, segment r: 5.59 mm segment s: 4.57 mm, segment t: 4.00 mm, grinding Starts from the section r including the highest point of the surplus and expands to the section r and the section s when the surplus height h there is 4.57 mm, and the height h at those sections is 4.
After reaching 00 mm, it is finally spread over the entire circumference (all five sections) of the head Ab in a manner such that it affects the section r, the section s, and the section t.

The displacement of the grinder 30 in the normal direction is fixed by the air cylinder 86, and the grindstone 31 is rotationally driven to actually grind the head Ab. Since the grinding proceeds in the manner determined above, the whetstone 31 is in contact with the head Ab (excess) at almost all the time when it is driven, and the grinding finish is efficiently performed.

Next, FIGS. 5 and 6 show an automatic finishing apparatus 1'which is a second embodiment of the present invention. FIG. 5 is a side view of the device 1 ′ in a state where the grindstone 31 is grinding the top of the rail A as seen from the side of the rail A.
6 is a VI-VI arrow view in FIG. This device 1'has a structure for the bottom part Ac, so to speak, added to the device 1 of the first embodiment so that the head part Ab and the bottom part (bottom face) Ac of the rail A can be ground at the same time. Therefore, the portion of the rail A where the head Ab is to be ground is basically the same as that of the device 1, and therefore the same reference numerals are given and the description thereof is omitted.

The bottom portion Ac of the rail A is, for example, a welded portion A.
When "a" is installed on a sleeper (not shown), it is necessary to finish the grinding, but the configuration for grinding the bottom Ac of the device 1'is shown in FIGS. It is as follows. That is, first, the guide 110 for the bottom Ac.
Is formed integrally with the base 2 (see FIG. 1) and the guide 10, and on the guide 110, a straight track 11 parallel to the bottom surface of the rail A and oriented in a direction perpendicular to the longitudinal direction of the rail A.
1 is set. The frame 120 is moved along the track 111 by using the motor 124, the toothed transmission belt 121, and the ball screw 122 as a driving source.
The grinder 130, the sub-frame 140, the pitch feed means 150, the copying roller 160, the reciprocating motion means 170, the surplus wall height detection mechanism 180, and the like are arranged on the 20 (each of the reference numerals 130 to 180 is the same as in the first embodiment). The basic configuration and functions are the same as those of the units 30 to 80 in the device 1).

The bottom Ac of the rail A can be ground and finished by driving the grinder 130 to apply the grindstone 131 to the welding surplus of the bottom Ac and moving the grinder 130 together with the frame 120 along the track 111. . Since the apparatus has a structure for the bottom part Ac independently of the target part of the head part Ab, this device 1 ′ has a head part Ab and a bottom part A.
It is also possible to grind both c and c at the same time. In addition, for the grinding of the bottom part Ac, the pitch feed of the grindstone 131, the profile grinding / weaving, and the height of the grindstone according to the surplus wall height can be automatically set based on the above configuration.

Although the embodiments have been introduced above, various other embodiments are possible in addition to the embodiments of the present invention. For example, the type of the grinder 30 (air-driven type) may be changed to an electric type, the air cylinder 42, which is the pushing means for the subframe 40, may be changed to a spring, or the air cylinder 86 may be a hydraulic cylinder, an electric cylinder, or the like. Changing to a fixing means is extremely easy. The fixing means of the guide 10 to the rail A is not limited to the base 2 or the bracket 3 shown in the above example, and the fixing bolts 3b and 4 can be changed to fluid pressure cylinders so that the fixing and position can be changed.
The guide 10 may be installed on the ground while adjusting the position. Depending on the rail profile
It is often convenient to be able to select and exchange guides from several types. Instead of the linear sensor 88, another type of detection means may be provided. Needless to say, it is also possible to apply the device having the same configuration to the rail welded part not only at the rail laying site but also at the factory (rail manufacturing site) (second aspect of the invention according to claim 4). The example device 1'is particularly suitable for this). In addition, in consideration of wear of the grindstone even during grinding of the same portion, it is possible to provide a control means for correcting the diameter reduction due to wear.

[0043]

The automatic finishing apparatus of the present invention has the following effects.

1) In order to grind the welded part of the rail, inefficient heavy work by a skilled worker is unnecessary, and the entire circumference of the rail head can be ground and finished by using one grinder.

2) In addition to being able to proceed with cutting at an accurate pitch for each stroke, the height of the grindstone in the first stroke and the final stroke can be set easily and accurately, and efficient finishing is possible. is there.

3) Further, in the apparatus according to the second aspect, even if the set track does not exactly correspond to the actual rail profile, proper grinding can be performed on the welded portion.

4) According to the apparatus of claim 3, the idling time of the grindstone can be further reduced as compared with the apparatus of claims 1 and 2, and the rail welded portion can be finished more efficiently.

5) Since the apparatus of claim 4 can grind the rail head and the welding surplus at the bottom of the rail in parallel, it is extremely efficient when it is necessary to finish the bottom as well. Target.

6) According to the apparatus of claim 5, it is easy to move and fix the apparatus between the welded portions at the rail laying site.

[Brief description of drawings]

FIG. 1 is an automatic finishing apparatus 1 as a first embodiment of the present invention.
FIG. 3 is a front view of the rail A viewed from a plane (transverse section) perpendicular to the longitudinal direction of the rail A.

2 is a plan view (partially shown in cross section) of the device 1 of FIG. 1. FIG.

3 is a side view (a part of which is shown in section) of the device 1 in FIG. 1, and is a view taken along the line III-III in FIG.

FIG. 4 is a cross-sectional view of the head of a rail to be ground and finished by the apparatus 1 of FIG.

FIG. 5 is an automatic finishing device 1 ′ according to a second embodiment of the present invention.
FIG.

6 is a view taken along the line VI-VI in FIG.

[Explanation of symbols]

 1.1 'Automatic finishing device 10/110 Guide 11/111 Orbit 20/120 Frame 30/130 Grinder 31/131 Grinding stone 40/140 Subframe 50/150 Pitch feeding means 60/160 Copying roller 70/170 Reciprocating means 80・ 180 Margin height detection mechanism 88 ・ 188 Linear sensor A Rail Ab Head Head Ac Bottom

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michimasa Oi 3-18 Kinoshita, Wakabayashi-ku, Sendai-shi, Miyagi JR Apart 1-304 (72) Inventor Kenichi Shishido 127 Kumagata, Arahama, Watari-gun, Watari-gun, Miyagi Prefecture ( 72) Inventor Shigeru Nozaki 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Inside Kawasaki Heavy Industries, Ltd. (72) Inventor Masakazu Ueda 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Inside the Kobe Factory (72) Inventor Masahiro Okada 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. Inside the Kobe Factory

Claims (5)

[Claims] 1. A device for finishing a welded portion by grinding and removing a weld surplus on a rail surface, wherein the frame is moved on a track corresponding to a profile of a rail head, and , A) a grinder that holds the outer peripheral surface of the rotating grindstone in contact with the welded portion and is held so that it can be pitch-fed in the normal direction of the rail surface, and b) supports the grinder so that it can be displaced and fixed in the normal direction. An automatic rail welding part finishing device comprising means and c) means for detecting the amount of displacement of the grinder in the normal direction. 2. A means for maintaining a constant angle of the frame with respect to a normal line of the rail surface during the movement, and a subframe which is movable in the normal direction and is pushed toward the rail by the pushing means. In the sub-frame, the grinder of a), the supporting means of b), the detecting means of c), and the contact point with the grindstone differ from each other only in the longitudinal position of the rail. The rail welding portion automatic finishing device according to claim 1, further comprising: a copying tool that is pressed against the rail surface at the non-welded portion. 3. The portion having the highest welding surplus is specified based on the output of the detecting means of the above-mentioned c), and starting from the area including the specified portion, the grinding range of the frame along the track is increased sequentially. The rail welding part automatic finishing device according to claim 1 or 2, further comprising control means for determining a moving range. 4. A frame different from the one described above is configured to move on a track parallel to the bottom transverse line of the rail, and the frame has the same structure as the above. Rail welding part automatic finishing device described in. 5. The rail welded part automatic finishing according to claim 1, wherein the track according to the profile of the rail head is formed on a guide that is positionally fixed to the rail. apparatus.