JPH0529648U - Clamping device for flange edge of shaped steel processing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a clamping device for a work (section steel) in a section steel processing machine, and the upper edge of the flange of the section steel can be fixed simultaneously in the vertical and horizontal directions by one operation. The purpose of the present invention is to obtain a clamp device having a structure capable of efficiently converting the force acting on the clamp tool in both directions. [Structure] A slide table 23 that moves up and down in the vertical direction (width direction of the flange 41 of the shaped steel 41) is provided with a clamp tool 27 pivotally supported by a pin 26 in the longitudinal direction of the shaped steel, and the clamp tool 27 is the pin. The pressing claw 28 that comes into contact with the edge surface 43 of the flange of the shaped steel at a position outside the axial center of 26, and the pressing claw 2
The lateral claw 29 that abuts the inner flange surface 44 near the edge of the flange 41 at a position inner than 8 is provided. The horizontal claw 29 faces the fixed plate 21 with the shaped steel flange 41 interposed therebetween, and the fixed plate 21 has a surface orthogonal to the table surface 4 of the machining reference table 2 on which the shaped steel 40 is placed. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp device for a work (shaped steel) in a processing machine that performs drilling, scalloping, and beveling on a shaped steel such as an H-shaped steel and a grooved steel, and eliminates the shape error of the shaped steel. The present invention relates to a clamp device that fixes the edge portion of the flange in an adjusted state.

[0002]

[Prior Art]

 When heavy cutting is performed on the shaped steel during groove processing, it is necessary to fix the flange edge of the shaped steel in order to avoid displacement or vibration of the flange due to processing reaction force. Shaped steels often have shape errors such as the squareness between the web 42 and the flange 41 and the flatness of the flange 41, as shown in an exaggerated manner in FIGS. There is. When the shaped steel with such a shape error is placed on the machining reference table 2 and the flange 41 is groove-processed by a tool that moves in a direction orthogonal to the table surface, the flange 41 is opened due to the inclination of the flange with respect to the table surface. A large error occurs in the tip shape, especially in the groove depth, which adversely affects the welding strength.

Therefore, as shown in FIG. 7, conventionally, as shown in FIG. 7, a clamp claw 52 having an inclined surface 51 facing outward is advanced in the flange width direction toward the edge of the flange 41 of the shaped steel 40 to be clamped. The force of the clamp claw 52 in the advancing direction (downward in the figure) clamps the flange 41 in the width direction between the clamping base 52 and the machining reference table 2, and the slanted surface 51 is brought into contact with the inner corner of the flange edge to cause a wedge action. The inclination of the flange 41 is corrected by pressing the edge of the flange 41 outward and pressing the flange 41 against the fixing plate 21 provided perpendicularly to the table surface.

[0004]

[Problems to be solved by the device]

 In the conventional structure as shown in FIG. 7, since the inclined surface 51 of the clamp member abuts on the inner side corner of the flange edge at one point, an attempt is made to exert a clamping force necessary to correct the inclination of the flange 41. Then, the surface pressure of the contact portion becomes very high, and there is a problem that the inclined surface 51 is dented or scratched.

If such a dent or damage occurs, the slippage between the inclined surface 51 and the inner corner of the flange edge becomes worse, so the force in the advancing direction of the clamp claw 52 pushes the flange 41 toward the fixing plate 21 side. It becomes difficult to convert the force into the contacting direction, and a vicious cycle occurs in which a larger clamping force is required to correct the inclination of the flange 41.

Furthermore, the structure in which the clamping force in the width direction of the flange 41 is converted into the inclination correction force in the thickness direction of the flange 41 by the sliding contact between the inclined surface 51 and the shaped steel 40 as described above is poor in the force conversion efficiency. However, there is a drawback that the actuator for driving the clamp claw 52 becomes large in size.

According to the present invention, the edge of the flange of the shaped steel can be simultaneously fixed in the flange width direction and the flange thickness direction by one operation, and the driving force acting on the clamp tool is efficiently converted in both directions. It is an object of the present invention to obtain a clamping device having a structure capable of applying the forces in both directions described above by means of the surfaces that are orthogonal to the acting directions of the forces.

[0008]

[Means for Solving the Problems]

 In the clamping device of the present invention, a clamping tool 27 pivotally supported by a pin 26 in a direction parallel to the longitudinal direction of the shaped steel is mounted on a slide base 23 which moves forward and backward in the width direction of a flange 41 of the shaped steel 40 to be processed. I have it. The clamp tool 27 includes a holding claw 28 that abuts the edge surface 43 of the shaped steel flange at a position outside the axis of the pin 26, and a flange inner surface 44 near the edge of the flange 41 at a position inside the pressing claw 28. And a lateral claw 29 that abuts against the.

The horizontal claw 29 faces the fixed plate 21 with the shaped steel flange 41 interposed therebetween, and the fixed plate 21 has a surface orthogonal to the table surface 4 of the machining reference table 2 on which the shaped steel 40 is placed. I have. One of the two fixed plates 21 facing each other arranged to guide the flanges 41 on both sides of the shaped steel is mounted on the column 5b which is close to and separable from the other, and the shaped steel is moved by the proximity movement of the column. Hold both flange surfaces of.

[0010]

[Action]

 When the slide base 23 is advanced toward the edge of the flange 41, the pressing claw 28 clamps the flange 41 in the width direction, and the clamp reaction force applied to the pressing claw rotates the clamp tool 27 around the pin 26. Pushes the lateral claw 29 in the thickness direction of the flange 41.

Therefore, when the shaped steel 40 is placed on the machining reference base 2 and the flange 41 is sandwiched between the opposing fixing plates 21, the slide base 23 is advanced toward the flange 41, the clamp tool 27 is first The pressing claw 28 contacts the edge surface 43 of the flange 41, and the contact reaction force causes the clamp tool 27 to rotate around the pin 26 so that the lateral claw 29 contacts the inner surface of the flange 41. The clamping force applied to the slide base 23 becomes a force that is applied to the presser pawl 28 and clamps the flange 41 in the width direction, and a reaction force equal to the clamping force becomes a moment that rotates the clamp tool 27. The lateral claw 29 is urged toward the fixed plate 21 to sandwich the edge of the flange 41 in the thickness direction between the flange 41 and the fixed plate 21, and press the edge of the flange against the fixed plate 21 to move the flange 41 Correct the inclination.

According to the structure of the present invention, the force for clamping the flange 41 in the width direction acts at a right angle from the pressing claw 28 to the edge surface 43 of the flange, and the force for pressing the flange 41 in the thickness direction is The lateral claws 29 act on the inner surface of the flange 41 at right angles. Therefore, the edges of the flange 41 can be securely fixed by the forces in the two directions acting from each other at right angles to each other, and even during heavy cutting, there is no displacement of the flange or vibration, and more accurate processing is possible. become.

[0013]

EXAMPLE FIG. 2 and FIG. 3 are views showing an example of a shaped steel machine equipped with the clamp tool of the present invention. This processing machine comprises a cylindrical milling cutter 15a for driving and a circular arc for scalloping into a tool head 11 which is raised and lowered along columns 5a and 5b standing upright on both sides of a processing reference table 2 on which a shaped steel 40 is placed. The milling cutter 15b and the conical frice 15c for beveling are mounted, and these milling cutters are simultaneously driven by the tool motor 14 to move the tool head 11 in the width direction of the flange 41, so that the flange 41 shown in FIG. The trailing end a, the scalloping b of the web 42, and the groove c are performed.

The machining reference table 2 is formed by a short reference roller that is axially supported by the columns 5 a and 5 b so as to face each other, and the top thereof forms the table surface 4. The reference roller 2 is positioned at substantially the same height as the group of material loading / unloading rollers 3 ... The two columns of the first column 5a and the second column 5b are located on both sides of the reference roller 2, and the first column 5a is provided on the base 1 so as to be movable in the longitudinal direction of the shaped steel 40, and The column 5b is movably provided in the direction perpendicular to the longitudinal direction of the shaped steel 40, and is provided with a shift motor 6 and a clamp cylinder 7 for driving them.

Each of the columns 5a and 5b is equipped with a respective tool head 11 that can move up and down along a guide rail 10, and the tool head 11 is mounted on the upper ends of the columns 5a and 5b with the downward facing downward gears. It is driven up and down by being screwed into a feed screw 13 which is driven by a lifting motor 12 provided with.

On each tool head 11, three horizontal tool shafts that are simultaneously driven by the tool motor 14 are arranged side by side in the vertical direction, and the end of the flange 41 is scraped on the upper tool shaft. A cylindrical milling cutter 15a for drop-in machining is attached, an arc-shaped frice 15b for scalloping is attached to the connecting portion between the web 42 and the flange 41 on the intermediate tool shaft, and the end face of the flange is attached to the tool shaft at the lower end. A conical milling cutter 15c for beveling is installed to scrape off diagonally. In addition, a positioning device 19 having stoppers 18a, 18b for advancing and retracting for positioning the shaped steel 40 by contacting the end surface of the shaped steel 40 prior to machining is provided at the upper end of these tool heads 11. Has been.

On the other hand, a guide plate 22 that also serves as a fixing plate 21 that holds the flange surface of the shaped steel 40 from both sides is fixed to the facing surfaces of the columns 5a and 5b, and the slide base 23 is vertically attached to this guide plate. It is slidably mounted. The slide base 23 is connected to a piston rod 25 of an upper edge fixing cylinder 24 provided on the inner upper ends of the columns 5a and 5b and is driven up and down. On the slide base 23, a clamp tool 27 is rotatably suspended by a pin 26 extending in a direction parallel to the longitudinal direction of the shaped steel 40. As shown in FIG. Two pawls, a press pawl 28 located on the outer side (column side) and a lateral pawl 29 extending downward inside the presser pawl 28, are formed to project. The clamp member 27 has a slightly heavy weight on the holding pawl 28 side so that the holding pawl 28 can be suspended at a position where the holding pawl 28 is rotated slightly inward in the freely suspended state, and the end of the inward swing end. A stopper pin 30 for regulating the above is set up, and the stopper pin 30 is in a freely suspended state and abuts on the lower surface of the slide base 23.

In addition to the upper edge fixing cylinder 24, the columns 5a and 5b are provided with a lower edge fixing cylinder 33. The piston rod of the lower edge fixing cylinder has a reference roller as shown in FIG. It is connected to an L-shaped claw 34 that extends inside the lower edge of the flange 41 of the shaped steel 40 through the side of 2.

A beam 36 that connects the columns 5a and 5b is provided at the upper ends of the columns 5a and 5b. The first column 5a and the beam 36 are slidable in the longitudinal direction of the shaped steel 40, and the second column 5b and the beam 36 are slidable in the longitudinal right-angle direction of the shaped steel 40, and they are slidable. The moving part is provided with a locking device 38 in addition to the rails 37a and 37b for regulating the sliding direction thereof. By fastening the locking device, the beam 36 and the upper end of the first column 5a and the first column 5a are locked. The upper ends of the two columns 5b are fixed to form a highly rigid gate-shaped frame.

Next, the fixing and processing operations of the shaped steel 40 in the shaped steel processing machine described above will be described. Prior to the supply of the shaped steel 40, the second column 5b is retracted so that the interval between the fixed plates 21 facing each other is set to be wider than the flange spacing of the shaped steel 40 to be processed, and the first column 5a. Is moved slightly to the front side of Fig. 2 (material feeding direction). The stoppers 18a and 18b are separately positioned on the left and right depending on the amount of drive-in processing. At this time, when the end portion of the shaped steel 40 is cut obliquely, the position of the first column 5a is determined according to the step difference amount of the flanges 41 on both sides.

In this state, the shaped steel 40 to be processed is placed on the table 2, and the shaped steel 40 is advanced until one end of the end contacts the stopper 18b on the second column 5b side. In this state, the second column 5b is advanced to temporarily clamp the shaped steel 40 between the fixed plates 21 facing each other, and then the clamping force is released, and the stopper 18a of the first column 5a is attached to the end of the shaped steel 40. It moves to the shaped steel 40 side until it abuts. In this state, the second column 5b is urged again in the advancing direction to clamp the shaped steel 40, and the beam 36 and the upper ends of the first and second columns 5a and 5b are fastened to each other to fix the rigidity of the columns 5a and 5b. Secure.

Next, the upper edge fixing cylinder 24 and the lower edge fixing cylinder 33 are actuated, and the lower edge of the flange 41 is pulled outward by the L-shaped claw 34 to be in close contact with the fixing plate 21. By this operation, the flange 41 is clamped in the width direction by the holding claw 28 of the clamp 27, and the upper edge of the flange 41 is brought into close contact with the fixing plate 21 by the horizontal claw 29. By this operation, the flanges 41 on both sides of the shaped steel 40 are fixed in a state of being along the fixing plates 21 of the columns 5a and 5b.

Next, the tool motor 14 is driven to rotate the three milling cutters 15 a, 15 b, 15 c, and the lifting motor 12 raises the tool head 11. As the tool head 11 rises, the end of the flange 41 is first abutted by the cylindrical milling cutter 15a to cut off the area shown by a in FIG. 4, and then the arc milling mill 15b is used to move the web 42 into a web as shown by b in FIG. It is scalloped and then the conical milling cutter 15c is used to cut away the groove portion shown as c in FIG.

At this time, by controlling the ascending speed of the tool head 11, after the cylindrical milling cutter 15 a starts processing at a predetermined feed speed, when the cylindrical milling cutter 15 a processes the position of the web 42, the first deceleration is performed. When the web is fed and the processing of the web 42 is completed, the original speed is restored. Then, when the arc milling machine 15b is processing the web 42, the second deceleration feed is carried out, and when the scalloping of the web 42 is completed, the conical milling is performed. The conical milling cutter 15c rises at the groove machining speed by 15c, and the rapid feed is performed at a position where the conical milling cutter 15c is separated from the upper edge of the flange 41.

In this way, the beveling of the end portion of the shaped steel 40 shown in FIG. 4 is performed, and after the conical milling cutter 15c is separated from the shaped steel 40, the rotation of the milling cutter is stopped, and in the reverse order to the above. After releasing the fixation of the shaped steel 40, the tool head 11 is returned to the lower home position, and one machining cycle is completed.

[0026]

[Effect of the device]

 According to the clamp device of the present invention, the width direction of the flange can be fixed in one operation and the inclination of the flange can be corrected by sandwiching in the thickness direction at the same time, and the force acting in the two directions can be applied to the edge of the flange. Since it acts from the surface and the inner surface in the direction perpendicular to the surface, the flange edge can be securely fixed, and highly accurate machining without misalignment becomes possible. Furthermore, the clamping force does not decrease due to the deformation or damage of the abutment surface of the claw of the clamp tool, and the lateral force conversion is performed efficiently, so a large and stable clamping force that does not change over time can be obtained. There is an effect.

[Brief description of drawings]

FIG. 1 is a front view showing a clamp device of the present invention.

FIG. 2 is a front view showing an example of a shaped steel processing machine.

FIG. 3 is a plan view showing an example of a shaped steel processing machine.

FIG. 4 is a plan view showing a processed state of an end portion of a shaped steel.

FIG. 5 is an explanatory view showing an example of a shape error of a shaped steel.

FIG. 6 is an explanatory view showing another example of the shape error of the shaped steel.

FIG. 7 is a schematic view showing an example of a conventional clamp structure.

[Explanation of symbols]

 23 Slide base 26 Pin 27 Clamping tool 28 Presser jaw 29 Side jaw 40 Shaped steel 41 Flange 43 Edge surface 44 Inner surface of flange

Claims (1)

[Scope of utility model registration request] 1. A flange (4) of a shaped steel (40) to be processed.
A clamp tool (27) is pivotally attached to a slide base (23) that advances and retracts in the width direction of (1) by a pin (26) in a direction parallel to the longitudinal direction of the shaped steel. Pressing claw (28) that abuts the edge surface (43) of the flange of the shaped steel at a position outside the axis of (26).
And a horizontal claw (29) that abuts the flange inner surface (44) near the edge of the flange (41) at a position inside the presser claw (28), and the slide base (23) is attached to the flange (41). When it is advanced toward the edge, the presser pawl (28) clamps the flange (41) in the width direction, and the clamp reaction force applied to the presser pawl causes the clamp tool (27) to rotate around the pin (26). Motion is a horizontal claw
A clamp device for a flange edge of a shape steel working machine, characterized in that (29) is pressed in the thickness direction of the flange (41).