JPH05285759A - Clamping device for cutting work of bending member - Google Patents

Abstract

PURPOSE:To set a member which has curvatures in two directions easily by providing clamping means which can position the member in the lateral direction and the up and down direction so as to cut, and has an equalizing function. CONSTITUTION:An up and down clamping means with clamp claws 4b which loads a member 11 to cut and has an equalizing function when a member 11 with L shape section form is cut, and a longitudinal direction positioning means to position the member 11 in the longitudinal direction are provided. Furthermore, a lateral clamping means 5 to position the member 11 in the lateral direction, and having an equalizing function is also provided, so as to reduce the setting time of the member 11. The member 11 of L shape section form set in such a way is cutting-processed stably by a cutter edge without generating chatter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for clamping a member having an L-shaped cross section and having curvatures in two directions.

[0002]

2. Description of the Related Art FIG. 1 is a perspective view showing an example of a member having an L-shaped cross section and having curvatures in two directions, which is to be cut by the present invention. Conventionally, as a device for clamping a member having such a shape, since the member has a curvature in two directions as shown in FIG. 1, the receiving bolts are arranged in the horizontal direction and the vertical direction, and the bolts are arranged from the other side. It was tightened and clamped.

[0003]

However, since the clamping device is manually operated as described above,
It takes time to set the members, and during cutting after clamping, there is a problem that the cutting surface is deteriorated due to chattering due to uneven tightening.

Therefore, an object of the present invention is to provide a clamping device for bending member cutting, which can simultaneously process a large number of members during one cutting, shorten the set time, and improve the processing accuracy. is there.

[0005]

In order to achieve the above-mentioned object, the present invention provides a clamping device for cutting a member having an L-shaped cross-section and has a function of mounting a member to be cut and an equalizing function. An upper and lower clamping means having the front and rear positioning means for positioning the member in the front and rear direction
A clamping device for cutting a bending member is provided, which has a left and right clamping means that positions the member in the left-right direction and has an equalizing function.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings. FIG. 2 is a front view when the clamping device is set on the milling machine. FIG. 3 is a side view showing only the clamp claw and the receiving portion of the clamping device.
FIG. 4 is a plan view showing only the clamp portion of the clamping device.

In FIG. 2, the base plate 1 is attached to a milling machine (not shown) for cutting, for example. The base plate 1 is provided with columns 2 and 2, and an auxiliary base 3 is fixed to the upper portions of the columns 2 and 2. Horizontal clamping means 5 and 5 are mounted on the auxiliary base 3 so as to be slidable in the left and right directions. Further, two member receiving bases 7, 7 (see FIG. 3) are fixed to the center of the auxiliary base 3. A free cradle 7a is movably attached to the front member cradle 7 (left side in FIG. 3), and a fixed cradle 7b is fixed to the rear member cradle 7 (right side in FIG. 3). There is.

A hydraulic cylinder 8 is attached to the center of the lower end of the auxiliary base 3, and a lower base 10 is attached to the lower end of the plunger of the hydraulic cylinder 8. Slide holders 9, 9 are attached to the upper portions of both ends of the lower base. A guide groove 9a is provided inside the center of each of the slider holders 9, 9. Lower portions 4c and 4c at both ends of the slider holders 9 and 9 are fitted in the guide grooves 9a and 9a of the slider holders 9 and 9 so that the clamp holding body 4 is guided in the horizontal direction. With this configuration, when the hydraulic cylinder 8 operates, the clamp holding body 4 also moves up and down, but it is movable in the horizontal direction.
In the case of this embodiment, the clamp holding body 4 has five clamp claws 4b arranged in a line in the lower central portion thereof, and wedge portions 4a, 4a are formed at the inner corners thereof.

Next, referring to FIG. 4, for example, five members 11 to be cut are arranged with the cutting surface 12 facing upward. A stopper 14 and an air cylinder 15 for fixing the front and rear of these members 11 are provided. As is clear from FIG. 4, the member 11 has its rear portion (the right portion in FIG. 4) stopped by the stopper 14 and is fixed to the tip of the plunger of the air cylinder 15 from the front.
It is positioned at a predetermined position by being pushed with.

As shown in FIG. 2, a fixed clamping member 5a is fixed to the upper part of the clamping assisting means on the right side (lower side in FIG. 4) of the clamping assisting means 5, and the clamping assisting means 5a is fixed. A free clamping member 5b is rotatably attached to an upper part of the left side (upper side in FIG. 4) of the clamping assisting means 5. These members 5a, 5a, 5b and 5b are respectively provided in respective hydraulic cylinders 6.
The hydraulic cylinder 6 positions the member 11 by means of the hydraulic cylinders 6.

Next, the operation of the clamping device of the present invention will be described. First, five members 11 are placed with the cutting surface 12 facing upward on the free receiving base 7a and the fixed receiving base 7b of the member receiving bases 7, 7. At this time, the clamp claw 4b of the clamp holding body 4 is at the upper standby position by the hydraulic cylinder 8, and the auxiliary base 3 supporting the member receiving bases 7, 7 is slid forward, for example, by an air cylinder (not shown). It is out of the set section. Also,
The cutter blade 13 shown in FIG. 3 is also detached from the setting portion at this point.

As shown in FIG. 4, the mounted member 11 is pushed by the air cylinder 15 against the stopper 14 to be positioned in the front-rear direction. Thereafter, the clamp holding member 4 is operated by an air cylinder (not shown) to return to the set position, and the clamp claw 4b is pressed by the hydraulic cylinder 8 to press the member 11 as shown in FIG. Hold it to position vertically.
At this time, the member 11 is clamped while equalizing with the free cradle 7a and the fixed cradle 7b. Further, as shown in FIG. 2, the wedge portions 4a, 4
a descends and pushes the clamping assisting means 5 toward the center. As a result, temporary horizontal positioning is performed. Finally, as shown in FIG. 4, the member 11 is pushed from the left and right by the pressurization of the hydraulic cylinder 6, and the left and right are positioned. At this time, the fixed clamping member 5a and the free clamping member 5b are clamped while equalizing. In this way, all the vertical, front-back, left-right clamping is completed.

[0013]

As described above, according to the present invention, a member having a curvature in two directions can be easily set, and a stable clamping force can be obtained by providing an equalizing mechanism in the clamp portion, which is effective for cutting. The chattering can be eliminated, and the processing accuracy can be stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a member having an L-shaped cross section and having curvatures in two directions, which is to be cut according to the present invention.

FIG. 2 is a front view when the clamping device is set on a milling machine.

FIG. 3 is a side view showing only a clamp claw and a receiving portion of the clamping device.

FIG. 4 is a plan view showing only a clamp portion of the clamping device.

[Explanation of symbols]

 1 Base Plate 2 Strut 3 Auxiliary Base 4 Clamp Holding Main Body 5 Clamping Aid Means 7 Member Support 8 Hydraulic Cylinder 9 Slide Holder 6 Hydraulic Cylinder 13 Cutter Blade 15 Air Cylinder 7a Free Support 7b Fixed Support 5a Fixed Clamping Member 5b Free Clamping member 4a Wedge portion 4b Clamp claw

Claims (6)

[Claims] 1. A clamping device for cutting a member having an L-shaped cross section, in which a member to be cut is placed and vertical clamping means having an equalizing function, and front-back positioning for positioning the member in the front-back direction. A clamping device for cutting a bending member, comprising: a means and a left and right clamping means for positioning the member in the left-right direction and having an equalizing function. 2. The clamping device according to claim 1, wherein the upper and lower clamping means are a free cradle arranged in front of and below the member, a fixed cradle, and arranged above and pushed downward. A clamping device comprising a clamp claw. 3. The clamping device according to claim 1, wherein the positioning means comprises a stopper arranged rearward of the member and an air cylinder for pushing the member against the stopper. apparatus. 4. The clamping device according to claim 1, wherein the left and right clamping means includes a free clamping member and a fixed clamping member that sandwich a plurality of members and press them toward the center. apparatus. 5. The clamping device according to claim 1, further comprising means for temporarily positioning the member before positioning the member in the left-right direction. 6. The clamping device according to claim 5, wherein the means for temporarily positioning the member is a wedge portion arranged on both sides of a clamp claw of the left and right clamping means. apparatus.