JPS5835812B2 - Shaped steel processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new section steel processing device, and more specifically, for example, parting groove processing of H-section steel used in building materials, etc.
The present invention relates to a section steel processing device exclusively for processing section steel, which performs bevel processing and the like using a band saw.

Conventionally, bevel processing of H-beams used in steel construction, etc.
Gas cutting (fusion cutting) was generally used, but recently, Z and milling processes have been gradually used for general shape 7° rice.

The former processing method using gas cutting has drawbacks in terms of hardening of the cut portion C due to heat effects and maintenance of accuracy such as surface roughness.

Therefore, it requires secondary processing, nander finishing, etc.), which requires a lot of effort and time.

In addition, for the latter milling process: Milling tools have good machining accuracy, but the life of the cutting tool is short, and tool replacement due to tool regrinding and differences in bevel angle, etc. Therefore, in this case as well, there was a drawback that the work ability of the fox was poor.

This invention has been devised in order to effectively solve the problems of the conventional machining methods. To provide a section steel processing device which can perform bevel processing of H-section steel etc. with high efficiency by always making constant depths of cut c and r regardless of changes in resistance.

Hereinafter, a preferred embodiment of the present invention will be described based on the accompanying drawings.

1 to 4, the shaped steel processing apparatus 1 of the present invention mainly consists of a workpiece support table 5 installed on a base 3.
, a work clamp device 7 provided on one side of the work support table 5 in the longitudinal direction, and a work support table 5
a workpiece positioning device 9 provided on the front side wall perpendicular to the workpiece transport direction On the side,
A turning base 13 is rotatably mounted on the base 3, and a housing for supporting a cutting tool is provided on the turning pace 13 and can freely approach and move away from the workpiece W clamped by the workpiece clamping device 7. A cutting device 1 consisting of 15
It consists of 6.

The workpiece support table 5 installed on the base 3 is provided in a direction perpendicular to the transport direction X of the workpiece W, as shown in FIGS. 5, 6, and 7. A support plate 17 having an inverted U-shaped cross section and two transfer rollers 19a provided in parallel on both sides of the support plate 17.

19b, and a guide roller 21 arranged in parallel on one side of the one transfer roller 19b.

The support plate 17 is supported by a column 23 erected on the base 3, and both ends of the transfer roller 19at19b and the guide roller 21 are rotated by a bracket 25 erected directly on the column 23. freely supported.

The upper surface of the support plate 17 and the transfer rollers 19a, 1
The upper surface of the upper surface of the upper surface of the upper surface of the upper surface 9b is flush with the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface 9b.

a transfer roller 19a supported by the bracket 25;
A sprocket 29 is attached to each of the rotation support shafts 27 of 19b, and a chain 35, which is passed through a drive sprocket 33 attached to the tip of a drive shaft 31 (described later), is attached to and rotated around the sprocket 29. ing.

The drive shaft 31 to which the drive sprocket 33 is attached is attached to the lower side wall of the guide roller 21.
A manual handle 37 is provided at the base end.

Therefore, when an operator or the like rotates this manual handle 37, the drive sprocket 33 of the drive shaft 31 and the rotation support shaft 2
The transfer rollers 19a and 19b are rotated in a predetermined direction via the chains 35 which are connected to the sprocket 29 of No. 7, respectively, and move the work W placed on the work support table 5 in the transport direction Can be transported.

Next, the work clamping device 7 installed in the longitudinal direction 0f)-11J of the work support table 5 is integrally installed at a lower part of one side of the support plate 17, as shown in FIGS. 8 to 11. Base plates 39 having a length of 2 are slidably arranged in parallel.

On this base plate 39, as shown in FIG. 9, a guide part 41 and a work clamp member 43 which can be raised and lowered with respect to this guide part 41 are provided at a predetermined interval.

The guide portion 41 includes two guide plates 45° 4T that are erected in a direction perpendicular to the support plate 17 and spaced apart from each other by a predetermined distance, and these guide plates 45.47.
Two holding plates 49a and 49b are arranged in parallel at right angles to each other on the backs of the holding plates 49a and 49a.

49b and the back plate 51 installed between the guide parts 41) 45.47
．． 49a, 49b, 51 are fixed on the base plate 39 via ribs 53.55.

In addition, a clamp support 5 is provided in an elongated space 57 formed by the two guide plates 45° 47, the holding plates 49a) and 49b, and the back plate 51.
The proximal end portion 61 of the guide plate 45, 47 is engaged with the side wall of the guide plate 45, 47 and along the gap between the plates so as to be able to move up and down.

A screw hole 63 is bored in the center of the base end portion 61,
A threaded rod 65 for raising and lowering the clamp support body 59 is screwed into this screw hole 63.

This threaded rod 65 is inserted into the space 57, and its upper part is a bearing 6 installed on the guide plate 45.47.
7, and a knob 69 for rotating the threaded rod 65 is attached to its upper end.

A threaded rod 6 is disposed between the bottom surface of the proximal end 61 of the clamp support 59 located in the space 57 and the support member 71 attached to the lower part of the inner wall of the guide plate 45.
A coil-shaped plate spring 73 is fitted to cover the lower end of the coil 5.

This leaf spring 73 has the function of constantly urging the clamp support body 59 upward and the function of preventing dust, chips, etc. from adhering to the threaded rod 65.

Further, the head 75 of the clamp support 59 is provided with an upper clamp base 79 whose center portion is rotatably supported via a shaft 77, and both ends of the upper clamp base 79 are provided with the guide plates. Work holding members 81 and 81 for clamping the work W between the workpieces 45 and 47 are attached.

A fluid cylinder 83 is installed inside each of the work holding members 81 and 81, and a contact member 85 that contacts the work W is attached to the tip of a rod of the fluid cylinder 83.

Next, below the upper clamp base 79 attached to the head 75 of the clamp support 59, that is, on the base plate 39, a lower clamp base 87 similar to the upper clamp base 79 is rotated via a shaft 89. It can be installed freely.

Note that the lower clamp base 87 has exactly the same configuration as the upper clamp base 79, so a description thereof will be omitted.
The following description will be explained using the same reference numerals.

Further, the shaft 89 supporting the lower clamp base 87 is provided on the same straight line as the shaft 77 rotatably supporting the upper clamp base 79, so that the upper and lower clamp bases 79, 87 act simultaneously, and The vertical positions at which the work W is clamped are also exactly the same.

Next, a guide member 93 having a screw hole 91 is attached to one end of the base plate 39 that supports the lower clamp base 87, and the tip of a threaded rod 95 is screwed into the screw hole 91.

The intermediate portion of the threaded rod 95 is rotatably supported by a bearing 99 on a support plate 97 erected on the base 3, and a bevel gear 101 is fitted to the base end of the threaded rod 95. .

As shown in FIGS. 9 and 10, this bevel gear 101 meshes with a bevel gear 105 attached to the tip of a handle shaft 103, and a manual handle 107 is attached to the base end of the handle shaft 103. ing.

Next, the workpiece positioning device 9 provided on the front side wall of the workpiece support table 5 perpendicular to the workpiece conveyance direction Workpiece conveyance direction
The base plate positioning device 109 positions the workpiece W in the direction Y perpendicular to the workpiece transfer direction X, and the workpiece stopper device 111 positions the workpiece W in the workpiece conveyance direction X.

The base plate positioning device 109 is shown in FIGS.
As shown in FIG.
5 is rotatably provided, and this positioning rod 115 is attached parallel to the upper surface of the workpiece support table 5.

A handle 117 for rotating the positioning rod 115 is integrally provided at one end of the positioning rod 115, and a notch is provided at the -111 portion of the handle 117 and approximately in the middle thereof. Stopper member 119
, 121 are provided.

Note that this notch facilitates opening from first, second, and third positioning pieces 127, 129, and 131, which will be described later.

A positioning rod 123 is provided below the positioning rod 115, parallel to the positioning rod 115 and spaced apart from it by a predetermined distance, and having a threaded portion over almost its entire length.

Both ends of the position setting rod 123 are attached to the side walls of the support plate 97 that supports the workpiece support table 5 via support brackets 125.
The first positioning piece 127 for cutting off is attached to the threaded portion of
A second positioning piece 129 for the inner groove, and a third positioning piece 131 for the outer groove are slidably screwed into each other.

Each 1st, 2nd, 3rd positioning piece 127° 129.13
1 is formed into a disk shape, and has a plurality of stopper grooves 133 (in this embodiment, six at 60 degree intervals) bored on its outer circumferential surface, and further has grooves between the stopper grooves 133. , Knurled to prevent slipping.

Further, on the side wall of the support plate 97, each first, second,
Opposing the third positioning piece 127.129.131,
Stopper plates 135a, 135b.

135c is attached to one end.

These stopper plates 135a, 135b.

135c, as shown in FIGS. 13 and 14, a hook portion 137 that engages with the stopper groove 133 of each of the pieces 127, 129, and 131, and a hook portion 137 that engages and disengages from the stopper groove 133. It consists of an operating section 139, and stopper plates 135a, 135b, 135c.
is made of an elastic material (for example, a spring plate).

With the above configuration, in order to position the workpiece support table 5 in the Y direction, that is, in the direction orthogonal to the transport direction X of the workpiece W, the first, second,
Slide either of the third positioning pieces 127, 129 or 131 along the position setting rod 123, and stopper plates 135a, 135b, 1 at a predetermined position.
The hook portion 137 of 35c is engaged with the stopper groove 133 and fixed.

By rotating the manual handle 107 provided at the lower part of the workpiece clamping device 7, the workpiece support table 5 slides, and the stopper members 119, 121 of the positioning rod 115 move together with the workpiece support table 5.
When one of the fixed positioning pieces 127, 129, 131 comes into contact with any one of the fixed positioning pieces 127, 129, 131, the positioning of the workpiece W in the Y direction is completed.

Next, the workpiece stopper device 111 that positions the workpiece W in the workpiece conveyance direction It is rotatably attached via a support bracket 141.

This work stopper device 111 includes a rotary support shaft 143 rotatably supported by the support bracket 141, and an arm member 14 erected on the circumferential surface of the rotary support shaft 143.
5, a stopper plate 147 attached to the tip of the arm member 145, and a stopper screw 149.

The stopper plate 147 and the stopper screw 149 are rotated around the rotation support shaft 143 via a rotation handle 151 provided on the rotation support shaft 143.
and rotates along the side wall of the base plate 39.

The stopper screw 149 provided inside the stopper plate 147, that is, on the base plate 39 side, has a 17th stopper screw 149.
As shown in the figure, a disc-shaped abutment member 153 attached to its tip is configured to be extendable and retractable via a threaded rod 155.

The stopper screw 149 is used when positioning the workpiece W near the unloading end of the workpiece support table 5, and the stopper plate 147 is used when positioning the workpiece W at a position slightly away from the unloading end. It is.

Therefore, the positioning range of the workpiece W in the workpiece conveyance direction X can be performed within the space l between at least the side surface of the abutting member 153 and the inner wall of the stopper plate 147, as shown in FIG.

That is, when positioning the workpiece W using the stopper screw 149, it is used to set a small depth of cut of the cutting tool 157, which will be described later, and when positioning the workpiece W using the stopper plate 147, it is used to reduce the depth of cut. This is used when setting a large value.

Next, the work support device 11 that supports the bottom of the work W protruding from the unloading end of the work support table 5 is connected to the guide plate 4 of the work clamp device 7 as shown in FIG.
The workpiece support device 11 is provided at the bottom of the workpiece support table 7 so as to protrude along the side edge of the base plate 39, and is attached so that the upper surface of the workpiece support device 11 is flush with the upper surface of the workpiece support table 5.

The function of this workpiece support device 11 is mainly to prevent shaking, shaking, displacement, etc. during workpiece processing, and to enable processing to be performed in a stable state.

Next, the operating method of the work clamping device 7 and the work positioning device 9 will be briefly explained.

First, after the workpiece W is transported or placed on the workpiece support table 5 at a predetermined position, the workpiece W is positioned in the transporting direction X.

Positioning of the workpiece W in the transport direction X is to determine how much the processed end of the workpiece W should protrude from the delivery end of the workpiece support table 5. It differs depending on the bevel processing).

In other words, the shaped steel processing apparatus 1 of the present invention processes the cutting tool 157 as a band saw for punching, outer beveling, and inner beveling of a shaped steel used for building materials such as H-beams. be.

First, the order of the operation method is to position the workpiece W in the transport direction X.

This positioning work varies depending on the cutting depth of the work W as described above, and either the stopper plate 147 or the stopper screw 149 is used.

In this operation, the operator holds the rotary handle 151 and rotates it around the rotary support shaft 143, so that either the stopper plate 147 or the stopper screw 149 to be used faces the workpiece W on the workpiece support table 5. let

Then, the processing end of the workpiece W is fixed to the stopper plate 147.
Alternatively, it is positioned by abutting against the stopper screw 149.

Next, in the clamping operation of the workpiece W, first, the height positions of the clamp support body 59 and the upper clamp base 79 are adjusted according to the size of the workpiece W placed on the workpiece support table 5.

This height position adjustment is achieved by rotating a knob 69 attached to the upper end of the threaded rod 65, and the rotation of the threaded rod 65 causes the base end 61 of the clamp support 59 to expand and contract the leaf spring 73 in the space 57. It moves up and down along the threaded rod 65 while moving.

When the height position adjustment work of the clamp support body 59 with respect to the workpiece W is completed in this way, next, the fluid cylinders 83 provided at both ends of the upper and lower clamp bases 79°87 are extended by operating the operation box 233, which will be described later. ,
The contact member 85 provided at the tip of the rod is brought into contact with the wall surface of the workpiece W, and the workpiece W is firmly clamped between the guide plates 45 and 47 as shown in FIGS. 8 and 10.

After the clamping operation of the workpiece W is completed, in order to set the processing position of the workpiece W with respect to the cutting tool 157, a positioning operation is next performed in the lateral direction of the base plate 39, that is, in the direction Y orthogonal to the workpiece conveyance direction X.

Similar to the positioning work in the X direction described above, this lateral position adjustment differs depending on the type of workpiece W to be machined. First, each of the first, second, and third positioning pieces 127 129 and 131 are set at appropriate positions.

From this state, when the manual handle 107 shown in FIG. 9 is rotated in either direction, the handle shaft 1
03 rotates, and the threaded rod 95 rotates via the bevel gear 101 that meshes with this bevel gear 105.

When this threaded rod 95 rotates, the base plate 39 advances and retreats in the Y direction via the guide member 93, and the set first
, the stopper member 119 of the positioning rod 115 on either of the second and third positioning pieces 127, 129 and 131.
Or 121 comes into contact with the base plate 39 at this point.
The positioning work in the Y direction is completed.

Next, on the processing side of the workpiece W, the cutting device 16 installed on the base 3 mainly connects the rotating base 13 rotatably installed on the base 3 and the rotating base 13 as described above.
It consists of a housing 15 for supporting a cutting tool, whose one end is pivotably supported on the top.

The base end portion of the housing 15 is shown in FIGS. 1, 2, and 3.
As shown in the figure and FIGS. 19 and 20, the rotating base 1
A pivot shaft 15 provided on the work support table 5 side above 3
8, it is installed vertically so as to be able to turn freely.

A driven wheel 159 and a driving wheel 161 are arranged side by side at a predetermined interval in the upper and lower parts of the housing 15 facing the work supporting table 5 side.
At 161, a band-shaped cutting tool 157 (a band saw is used in this embodiment) is passed over in an endless manner.

The drive wheel 161 is connected to a drive motor 163 (connected to the first and second mouth parts) provided on the back of the housing 15.
The cutting tool 1 is hooked onto the drive wheel 161 and the driven wheel 159 by the drive of the drive motor 163.
57 in a predetermined direction.

It rotates at a constant speed.

A guide member 165 having a concave cross section is provided upright on one side of the housing 15, and this guide member 165 includes:
Supports the back surface of the cutting tool 157 and guide member 165
A movable bracket 167 and a fixed bracket 169 that can be raised and lowered are provided along both side edges of the bracket.

An elevating screw rod 171, which is vertically disposed approximately at the center of the guide member 165 in the width direction, is screwed into approximately the center of the movable bracket 167 and the fixed bracket 169 in the longitudinal direction, and the upper end of the elevating screw rod 171 Handle 1 provided on
By rotating 73, the movable bracket 16
7 is something that goes up and down.

Movable bracket 1 supporting the back of the cutting tool 157
As shown in FIG. 21, a U-shaped groove 175 is formed at the tip of the fixing bracket 67 and the fixing bracket 169.
Inside are guide chips 177a and 177b that support the cutting tool 157 while sandwiching both sides thereof, and the cutting tool 157.
Guide chips 177a, 177b and guide roller 1 provided with a guide roller 179 that guides the back surface of
As for the material of 79, since high heat is generated due to friction with the cutting tool 157, it is preferable to use a super steel alloy or the like.

Next, a cutting tool 1 is placed at the bottom of the movable bracket 167.
57 is pressed and supported with a predetermined pressure, and the cutting tool 1
A vibration prevention device 181 for the cutting tool 157 is provided to absorb and alleviate vibrations, shakes, etc. of the cutting tool 157.

As shown in FIG. 22, this vibration prevention device 181 includes a vibration prevention member 183 that supports the back surface of the cutting tool 157;
A swing arm 185 rotatably supports the center of the side part of the vibration prevention member 183 and has one end swingably attached to the movable bracket 167, and a buffer elastically supports the back of the swing arm 185. It is composed of a member 187.

The buffer member 187 has a tip connected to the back of the swing arm 185 via a pin or the like, and a rear end that slides along a guide hole 189 of a support bracket 188 suspended from the bottom of the movable bracket 167. support rod 19
1, a nut 193 provided at the tip of the support rod 191, and a spring 195 interposed between the support bracket 188.

As a result, swing arm 185 and vibration prevention member 18
3 always abuts and supports the back surface of the cutting tool 157 due to the elastic force of the spring 195, and also supports the cutting tool 157.
7 vibrates during cutting, the swing arm 185 rotates in the direction of the arrow in FIG.
91 to the right, and the vibrations of the cutting tool 157 are absorbed by the elastic force of the spring 195.

Note that the elastic force of the spring 195 is the same as that of the support rod 191.
It can be set arbitrarily by moving a nut 193 provided at the tip.

197 also connects the movable bracket 167 to the guide member 16.
This is a lock handle for fixing the item 5 in a predetermined position.

Next, a workpiece depth adjustment device 199 that controls the depth of cut of the cutting tool 157 into the machined surface of the workpiece W provided between the housing 15 of the cutting device 16 and the turning base 13 is shown in FIG. As shown in FIG. 2, it is comprised of a swing cylinder 201 as a tilting actuator that tilts the housing 15 toward the workpiece W, a limit switch 203, and a fluid control device (not shown) that controls the operation of the swing cylinder 201.

The swing cylinder 201 has its piston rod 2
05 is rotatably connected to the back side wall of the housing 15, and the base end of the cylinder 207 is rotatably connected to a support frame 209 installed on the swing base 13.

The inside of the cylinder 207 is connected to the expansion side pressure oil chamber 21 via a piston 211 attached to the base end of the piston rod 205.
3 and a line side pressure oil chamber 215, and a correction spring 217 is installed inside the net side pressure oil chamber 215.

An actuator 223 of a limit switch 203 attached to the top of the cylinder 207 is attached to the tip of the piston rod 205 via an L-shaped guide bracket 219.
a plurality of fixed dogs 225 in contact with the movable dog 22;
7 is provided.

The movable dog 227 is fixed at a predetermined position in the elongated hole 231 of the guide bracket 219 via a lock handle 229.

The limit switch 203 is connected to a fluid control device (not shown), and this fluid control device is housed in an operation box 233 installed on the swing base 13 as shown in FIG.

This fluid control device connects the fluid cylinder 83 of the work clamp device 7 via a hydraulic circuit 235 shown in FIG.
(vice cylinder) and the swing cylinder 201 described above.

Next, operation control of the fluid cylinder 83 and the swing cylinder 201 will be explained based on a hydraulic circuit diagram 235 shown in FIG. 24.

First, when extending the fluid cylinder 83 of the work clamp device 7, the drive motor 239 of the hydraulic pump 237 is
When driven, the hydraulic oil sucked up from the tank 241 via the filter 243 is supplied to the expansion side cylinder chamber 83a of each fluid cylinder 83 through the supply path 245.

When hydraulic oil is supplied to the expansion side cylinder chamber 83a, the piston rod and the abutment member 85 attached to its tip expand, and as described above, the workpiece W is clamped between the guide plates 45 and 47. It is.

Also, at this time, the mesh side cylinder chamber 83b of the fluid cylinder 83
The hydraulic oil that has been supplied therein is trained into the tank 241 through a discharge path 247.

Conversely, when the fluid cylinder 83 is contracted,
When the manual switching valve 249 is switched, the hydraulic oil in the supply path 245 is supplied into the net-side cylinder chamber 83b, the piston rod is contracted, and the clamp on the workpiece W is released.

Further, the expansion and contraction operation of the swing cylinder 201, that is, the control of the amount of workpiece cutting by the cutting device 16 is controlled by the hydraulic pump 237.
The hydraulic oil sent out at the set pressure (approximately 70 kg/CTL) is transferred to the 5O
Swing cylinder 201 from supply path 255 via L1
When the piston rod 205 is supplied to the expansion side pressure oil chamber 213 of
rotates and tilts toward the workpiece support table 5 using the pivot shaft 158 as a fulcrum.

Simultaneously with the extension of the piston rod 205, the hydraulic oil in the net-side pressure oil chamber 215 passes through the manual switching valve 263 of the discharge passage 261 branching from the discharge passage 257 to the tank 2.
41 drained.

Also 259a. 259b is a check valve provided in the middle of the discharge path 257.

The extension stroke of the piston rod 205 is set in advance according to the depth of cut of the workpiece W.
Adjustment of the amount of cut, that is, the tilt angle of the housing 15, is performed by arbitrarily adjusting the movement of the movable dog 227 that comes into contact with the actuator 223 of the limit switch 203.

In this manner, when preparation for machining the workpiece W is completed, the manual switching valve 263 is switched, and the switching valves 267 provided in the flow rate adjustment passage 265 branching from the discharge passage 261 are switched and controlled.

If you start cutting the workpiece W from this state,
The housing 15 is tilted and supported by a predetermined stroke of the swing cylinder 201, that is, by a set pressure.
A large reaction force is applied to the cutting tool 157 during cutting.

The cutting resistance caused by the cutting tool 157 cutting into the workpiece W changes in accordance with the change in the length of the portion where the cutting tool 157 is actually in contact with the workpiece W (cutting length). .

The cutting resistance acts as a reaction force on the cutting tool 157, so when the cutting resistance changes, the pressure in the net side pressure oil chamber 215 and the discharge passage 257 of the swing cylinder 201 changes,
It becomes difficult to control the operating speed of the swing cylinder 201 to a constant level by controlling the flow rate.

Therefore, after disposing the pressure reducing valve 269 that keeps the preset secondary pressure almost constant regardless of the primary pressure, in the flow rate adjustment passage 265, the flow rate adjustment valve 271 can be carefully read in series. be.

With this configuration, the inlet pressure of the flow rate regulating valve 271 is constant, and the flow rate t)i is controlled to be constant.

That is, the operating speed of the swing cylinder 201 is always controlled to be substantially constant regardless of changes in cutting resistance, and the cutting speed of the cutting tool 157 into the workpiece W is substantially constant.

Further, the swing cylinder 201 can be contracted by switching the solenoid switching valve 253 to 5OL2.

Next, as shown in FIGS. 1 and 4, the pivot base 13 that pivots along the base 3 is provided substantially on the same axis below the center of rotation of the housing 15, that is, the pivot shaft 158. It is mounted so as to be able to rotate around a pivot shaft (not shown).

As shown in the figure, the swing drive device for the swing base 13 includes a chain 275 attached to the arcuate side wall 273 of the base 3.
is stretched, and this chain 275 is attached to a sprocket 279 at the tip of a rotating shaft 277 provided on the side wall of the rotating base 13.
are meshing.

Therefore, when rotating the rotating base 13 and the cutting device 16 erected on its upper surface, the sprocket 277 can be rotated by rotating the handle 281 provided at the upper end of the rotating shaft 277.
9 rotates along the chain 275, and the rotating base 13
can be rotated along the base 3.

Further, when the swing base 13 is to be stopped at a predetermined position on the base 3, it is fixed by rotating a lock handle 283 provided on the side of the swing shaft 277.

Various methods can be used as this fixing means, such as a method in which the upper and lower surfaces of the base 3 are clamped by rotating the lock handle 283, or a method in which the upper and lower surfaces of the base 3 are held by rotating the lock handle 283. There is a method in which a pin or the like protrudes into a hole (not shown) provided on the base 3 and engages with it, and any fixing means can be used.

Furthermore, the swing drive device for the swing base 13 is not limited to the above-mentioned embodiments; for example, there may be a method in which the swing base 13 is turned by meshing gears, or a method in which a pulley and a belt are combined and automatically turned by a motor or the like. Any means such as the above can be used.

Further, in the above embodiment, the cutting device 16 is connected to the pivot shaft 158.
Although it is provided so as to be able to swing freely around the workpiece support table 5, it is not limited to this embodiment, and may be provided so as to be able to move forward and backward (slidably) relative to the workpiece W on the workpiece support table 5.

Next, an example of the processing order of a workpiece W (H-section steel in this embodiment) using the section steel processing apparatus 1 of the present invention will be explained based on FIG. 25.

First, a workpiece W (H-shaped steel) of a predetermined size is carried onto the workpiece support table 5 in the state shown in FIG. 1 by a conveyor (not shown).

With this workpiece W brought in, it is determined whether the parting groove machining of the workpiece W is being performed, or the outside or internal bevel machining ■ or ■.
In this example, to facilitate explanation of the processing order,
The first step is cut-off groove processing, and the second step is external light processing■
Next, the case where the inner beveling process (3) is performed thirdly will be explained.

(1) Machining sequence of parting groove machining ■ When performing parting groove machining ■, first, the workpiece conveying direction
Position the machining end.

This positioning operation is performed using the workpiece stopper device 111 as described above, and the machining tip W1 of the workpiece W is pressed against the stopper plate 147 or the stopper screw 149 depending on the set parting groove depth H of the workpiece W. guess.

This butting operation is performed by moving the transfer rollers 19as19b provided at both ends of the workpiece support table 5 to the manual handle 37.
By rotating the workpiece support table 5 at
This is done while moving the upper workpiece W forward or backward.

Next, when the workpiece W is to be clamped by the workpiece clamping device T from the above-mentioned state, the clamp support 59 is adjusted according to the size of the workpiece W placed on the workpiece support table 5 as described above. And the height position of the upper crank base 79 is adjusted.

Then, the manual switching valve 249 (manual valve) of the fluid cylinder 83 of the work clamp device 7 is operated to extend the fluid cylinder 83 (see FIG. 24), and the abutment member 85 provided at the tip of the rod is operated to extend the fluid cylinder 83. are brought into contact with the side surfaces of the workpiece W, and the upper and lower parts of the workpiece W are firmly clamped against the guide plate 4547.

After the clamping operation of the workpiece W is completed in this manner, the workpiece stopper device 111, which was positioning the workpiece W in the X direction, is released.

This release operation rotates the rotary handle 151 in the original direction again to position the stopper plate 147 and the stopper screw 149 below the workpiece support table 5.

Next, after the work W is clamped, the work support table 5 on which the work W is fixed is set in order to set the machining position of the work W with respect to the cutting tool 157 of the cutting device 16, that is, the positioning of parting groove machining (■). , the workpiece is moved in the Y direction perpendicular to the transport direction X.

The amount of movement of the workpiece support table 5 in the Y direction is determined in advance by the stopper groove 13 of the first positioning piece 127 for cutting off.
3 is engaged with the hook portion 137 of the stopper plate 135a and fixed. In this state, the workpiece support table 5 is moved by the manual handle 107, and when the stopper member 119 comes into contact with the first positioning piece 127. to stop it.

This completes the positioning work of the workpiece W in the Y-axis direction.

Next, we will start the parting groove machining work (■) on the workpiece W, but before that, we must adjust the height and check the span of the movable bracket 167 of the cutting tool 157, check the tension of the cutting tool 157 (saw blade), and check the tension of the cutting tool 157 (saw blade). Confirm that the limit switch 203 at the forward end of the rotor is set, and also confirm that the swing base 13 is locked.

From this state, operate the operation box 233 to
First, the 1 drive motor 1 that rotationally drives the cutting tool 157
63, and then, as explained in the hydraulic circuit diagram 235 of FIG. 24, the solenoid switching valve 253 is operated to extend the swing cylinder 201.

Simultaneously with this extension operation of the swing cylinder 201, the housing 15 equipped with the cutting tool 157 is tilted toward the machining surface of the workpiece W around the rotation axis 158, and the rotating cutting tool 157 is used to move the workpiece W into a predetermined position. This is for machining positional cut-off grooves.

In this way, when the parting groove machining (3) progresses and reaches a predetermined depth, the actuator 223 of the limit switch 203
Then, the movable dog 227 moving together with the piston rod 205 comes into contact with the piston rod 205, and the supply of hydraulic oil to the extension side pressure oil chamber 213 of the swing cylinder 201 is stopped.
The extension operation of the swing cylinder 201 is stopped.

In this state, the parting groove machining is completed, and the swing cylinder 201 is retracted in order to temporarily bring the tilted housing 15 and cutting tool 157 into an upright state.

This operation is as explained in FIG. 24.

(2) Machining order of external light machining (2) As described above, when the parting groove machining (2) of the workpiece W is completed, the workpiece clamp in the workpiece clamping device 7 is released.

In this operation, contrary to the above case, the manual switching valve 249 of the fluid cylinder 83 is switched and controlled (see FIG. 24), and hydraulic oil is supplied to the contraction cylinder chamber 83b to contract the contact member 85. .

After the workpiece W has become free in this way, in order to adjust the machining end of the workpiece W with respect to the cutting tool 157, the workpiece W on the workpiece support table 5 is moved by the same operation as described above, and the workpiece positioning is performed. Work stopper device 111 of device 9 and base plate positioning device 10
9 to position it so that the outer beveling process (3) can be performed.

Then, the workpiece W is clamped again by the workpiece clamping device 7.

On the other hand, the cutting device 16 operates a lock handle 283 provided on the swing base 13 so that the swing base 13 can swing along the base 3 in order to set the beveling angle α in the external beveling process (3). Keep it.

From this state, the handle 281 is rotated to correspond to the groove angle α, and the swing base 13 and the cutting device 16 installed on the upper surface thereof are turned and locked at a predetermined position.

Then, as in the case of parting groove machining (2) described above, the swing cylinder 201 is operated by the operation box 233 to extend and operate, and the cutting tool 157 rotating on the side surface of the housing 15 is used to cut the external bevel. Processing (■) is carried out.

Note that the other operations are the same as in the case of cut-off groove machining (2), so detailed explanations will be omitted.

(3) Machining order of inner beveling ■ The machining order of this inner beveling ■ is exactly the same as the above outer bevel machining ■. After finishing the outer bevel machining ■,
The work stopper device 111 and the base plate positioning device 109 perform positioning in the X direction and the Y direction for internal beveling machining by partially unclamping the The turning base 13 is turned so that the cutting tool 157 of the cutting device 16 corresponds to the inner groove angle β.

Then, in the same manner as described above, the swing cylinder 201 is extended to tilt the housing 15 and the cutting tool 157 to perform the inner beveling process at a predetermined angle β.

Further, the portion A of the cut-off groove machining (3) is cut by melting at a welding factory or the like after all machining is completed.

The above explanation of the 770 machining sequence describes the parting groove machining (■), the external bevel machining (■), and the internal bevel machining (■) on one side of the workpiece W. As shown in FIG. For one side piece, perform parting groove machining ■ and outer bevel machining ■, and when performing parting groove machining and inner bevel machining ■ on the other side piece, finish outer groove machining ■. After that, it is necessary to reverse the workpiece W.

The processing is then carried out in the same manner as in the processing order described above.

In addition, as a method of processing both sides of the workpiece W without reversing the workpiece W, for example, the workpiece support table 5 is lengthened to lengthen the movement stroke of the workpiece W in the Y direction, and the workpiece clamping device 7 and the workpiece It is also conceivable to perform this by providing two positioning devices 9 respectively.

Furthermore, as another machining method mentioned above, if the turning center of the cutting device 16 is designed to be able to move parallel to the side surface of the J workpiece support table 5, both sides of the workpiece W can be machined without reversing the workpiece W. It is also possible to process it into

In addition, although the above-mentioned example explained only the processing operation of a section steel, it goes without saying that cutting processing of other steel plates, etc. is also possible.

As is clear from the above description of the embodiments, according to the present invention, the depth of cut of the cutting tool into the workpiece is always approximately constant regardless of changes in cutting resistance, so that groove machining of section steel etc. can be performed efficiently. It is something that can be done.

It should be noted that the present invention can be implemented in aspects other than the above-described embodiments by making appropriate design changes.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of the section steel processing device, Fig. 2 is a front view of the section steel processing device 1, Fig. 3 is a side view of Fig. 2, Fig. 4 is a plan view of Fig. 2, and Fig. 5 is a side view of the section steel processing device 1. The figure is a plan view of the workpiece transfer table.
Figure 6 is a left side view of Figure 5, Figure 7 is a front view of Figure 5,
Fig. 8 is a partially vertical front view of the work clamp device, Fig. 9 is a side view of Fig. 8, Fig. 10 is a plan view of Fig. 8, and Fig. 11 is a side view of Fig. 8.
The figure is a side view taken along the line XI-XI in Figure 10, Figure 12 is a front view of the base plate positioning device, and Figure 13 is a side view of the base plate positioning device.
Figure 14 is a vertical side view taken along line XIV-XIV in Figure 12, Figure 15 is a front view of the work stopper device, Figure 16 is a side view of Figure 15. figure,
Figures 17 and 18 show the stopper plate in Figure 15,
A plan view of the stopper screw, FIG. 19 is a side view of the cutting device,
Fig. 20 is a rear view of Fig. 19, Fig. 21 is a plan view of Fig. 19, Fig. 22 is a side view of the vibration prevention device installed in the cutting device, and Fig. 23 is a workpiece cutting depth adjusting device ( 24 is an explanatory diagram of the hydraulic circuit,
FIG. 25 is an explanatory diagram of processing the workpiece W. Main symbols in the drawings, 3... base, 13...
... Swivel base, 157 ... Cutting tool, 15
······housing.

Claims (1)

[Claims] 1. A rotating pace 13 is horizontally and rotatably mounted on the base 3 adjacent to the work supporting table 5 that supports the work W, and a housing 15 equipped with a saw-shaped cutting tool 157 is attached to the rotating base 13. A tilting actuator is provided so that the housing 15 can be tilted toward the work W, and the housing 15 is tilted toward the whirl W, and the cutting speed of the cutting tool 157 relative to the work W is kept almost constant regardless of changes in cutting resistance. A shaped steel processing device characterized by being provided with a control device that suppresses a tilting operation device as much as possible.