KR102425789B1 - Workpiece clamping device - Google Patents

Abstract

The present invention relates to a workpiece clamping device, which can fix a workpiece after being easily inserted into a side surface groove for processing the upper surface of a workpiece in a complicated shape, especially a workpiece with the side surface groove. To this end, the present invention comprises: a frame; an elevating cylinder unit which is installed in an inner portion of the right side of the frame in a vertical direction, and has the upper end of an elevating rod penetrating the upper surface of the frame to be exposed and vertically elevated; a back-and-forth moving cylinder unit which is installed in an inner portion of the left side of the frame in a horizontal direction, and has the left side end of a back-and-forth moving rod penetrating the left side surface of the frame to be exposed and moved in a back-and-forth direction; a clamper which has a reversed L shape composed of a vertical side and a horizontal side to be spaced apart upwards from the frame, wherein the left side end of the back-and-forth moving rod is pin-coupled to the vertical side, and the upper end of the elevating rod is pin-coupled to the horizontal side, in order to reciprocate in a diagonal line from the upper side in the left side towards the lower side in the right side according to the back-and-forth movement of the back-and-forth moving rod and the elevation of the elevating rod; and a compression member which is fixedly coupled to the lower portion of the right side end of the clamper, and comes in contact with the workpiece upon the movement of the clamper towards the lower side in the right side, to compress the workpiece downwards before clamping the same.

Description

Workpiece clamping device {WORKPIECE CLAMPING DEVICE}

The present invention relates to a workpiece clamping device, and more particularly, to a workpiece clamping device that can be easily inserted into a side groove to fix the workpiece for upper surface machining of a workpiece having a complicated shape, in particular, a workpiece having a side groove formed thereon.

In general, a workpiece clamping device is used to fix a workpiece on a table or workbench for machining the workpiece.

As shown in Figs. 1 and 2, for example, when the workpiece clamping device is to process the upper surface of the workpiece by a vertical milling machine, the workpiece is first positioned on the work bench and then the upper surface of the workpiece is pressed to fix the workpiece. . Usually, it is fixed by pressing the upper surface along the circumference of the workpiece through two or more workpiece clamping devices.

The upper surface of the fixed workpiece is processed by contacting the machining tool. If the machining tool is processed by contacting the machining tool with the upper surface of the workpiece while the upper surface is pressed by a plurality of clamp devices, the machining tool cannot be machined at the pressed position. will do Therefore, when machining the upper surface of the workpiece, there is a cumbersome problem in that the part that has not been machined due to the pressure is released after the first machining is secondarily machined.

In particular, since the workpiece clamping device according to the prior art has a hinge-type rotary link structure as shown in FIG. 3, it is inserted into the side groove because the rotation radius of the rotary link is large when machining the upper surface of a workpiece having side grooves among complex shapes. Therefore, there is a problem in that it is difficult to fix the work piece, and in the end there is a problem that the work piece having any shape has no choice but to be fixed by pressing the top surface.

An object of the present invention, devised to solve the above problems, is to provide a workpiece clamping device that can be easily inserted into a side groove for fixing the workpiece by being easily inserted into the side groove for processing the upper surface of a workpiece having a complicated shape, in particular, a workpiece having side grooves formed therein. is to do

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings.

In order to achieve the above object, the workpiece clamping device according to the present invention includes a frame and a frame, installed in a vertical direction inside the right side of the frame, and the upper end of the lifting rod is exposed through the upper surface of the frame to ascend and descend It consists of a lifting cylinder part, a forward/backward cylinder part installed in the horizontal direction inside the left side of the frame, and the left end of the forward/backward rod is exposed through the left side of the frame and moves forward and backward, and a vertical side and a horizontal side In a ┏' shape, the frame is spaced apart and installed above the frame, the left end of the forward/backward rod is pin-coupled to the vertical side, and the upper end of the lifting rod is pin-coupled to the horizontal side to move forward and backward of the forward/backward rod and A clamper that reciprocates obliquely from upper left to lower right in accordance with the lifting and lowering of the lifting rod, is fixedly coupled to the lower right end of the clamper, and is in contact with the work when the clamper moves to the right and lower right and presses the work downward. It comprises a pressing member for clamping.

In addition, in the clamper, a forward/backward pin coupling hole through which the left end of the forward/backward rod is pinned by a forward/backward pin is formed on the vertical side, and the upper end of the lifting rod is pinned to the horizontal side by a lifting pin. It is characterized in that the lifting pin coupling hole is formed through.

In addition, the forward/backward pin coupling hole is a long hole extending up and down on the vertical side so as to be movable up and down based on the forward/backward pin, and the lifting pin coupling hole has the horizontal side so as to be movable back and forth based on the lifting pin. It is characterized by a long hall extending from left to right.

In addition, in the clamper, an oblique guide hole formed through an oblique line from upper left to lower right is formed on the horizontal side to the left of the lifting pin coupling hole, and the frame is fixedly coupled to the upper left side, and the oblique guide hole And it characterized in that it comprises a guide bracket that is pin-coupled by the guide pin.

In addition, the lifting cylinder unit includes a lifting cylinder installed in a vertical direction inside the right side of the frame, a lifting piston which is installed so as to be able to ascend and descend in the interior of the lifting cylinder, and the lifting rod is extended and coupled to the upper surface, and the lifting and lowering; An ascending hydraulic line that communicates with the lower part of the cylinder and moves the lifting piston upward when hydraulic pressure is supplied, and a descending hydraulic line that communicates with the upper part of the lifting cylinder and moves the lifting piston downward when hydraulic pressure is supplied. characterized by including.

In addition, a forward/backward cylinder installed in the horizontal direction on the left side of the frame, a forward/backward piston which is installed movably back and forth inside the forward/backward cylinder, and the forward/backward rod is extended and coupled to the left side, and the forward/backward movement A left moving hydraulic line that communicates with the right side of the cylinder and moves the forward and backward piston to the left when hydraulic pressure is supplied, and the left side of the forward and backward cylinder communicates with the left side of the cylinder, and moves the forward and backward piston to the right when hydraulic pressure is supplied It is characterized in that it further comprises a right-moving hydraulic line.

In addition, the frame includes a clamping port and an unclamping port for supply and discharge of hydraulic pressure on one side, and the unclamping port is in communication with the rising hydraulic line and the left moving hydraulic line, the clamping port, It is characterized in that it communicates with the down hydraulic line and the right moving hydraulic line.

In addition, the clamper, when the hydraulic pressure is supplied from the unclamping port, the hydraulic pressure is supplied to the rising hydraulic line and the left moving hydraulic line, and the left side relative to the frame by the rising of the lifting rod and the left movement of the forward/backward rod. It moves upward, and when hydraulic pressure is supplied from the clamping port, hydraulic pressure is supplied to the descending hydraulic line and the right-moving hydraulic line and moves downward to the right based on the frame by descending of the lifting rod and moving the forward/backward rightward of the rod. characterized in that

The workpiece clamping device according to the present invention is a '┏'-shaped clamper reciprocating obliquely by the interlocking operation of the elevating cylinder part and the forward/backward cylinder part for upper surface machining of a complex-shaped workpiece, particularly a workpiece having side grooves. It is easily inserted into the side groove and has the effect of fixing the workpiece.

1 and 2 are side views showing the workpiece clamping process of the workpiece clamping device according to the prior art,
3 is a side view showing a state in which clamping cannot be achieved through insertion of a side groove of a workpiece in which a side groove is formed from the embodiment of FIG. 1;
Figure 4 is a perspective view showing an embodiment of the workpiece clamping device according to the present invention,
Figure 5 is a side cross-sectional perspective view showing the unclamping state of the embodiment of Figure 4,
Figure 6 is a side cross-sectional perspective view showing the clamping state of the embodiment of Figure 4,
7 is a side view of a main part showing a clamper in the embodiment of FIG. 4;
Fig. 8 is a side view showing an unclamping state for the workpiece of the embodiment of Fig. 4;
Fig. 9 is a side view showing a clamping state for the workpiece of the embodiment of Fig. 4;

Hereinafter, a preferred embodiment of the workpiece clamping device according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a workpiece clamping device, and as shown in FIGS. 4 to 9 , a frame 100, an elevating cylinder 200, a forward/backward cylinder 300, a clamper 400 and a pressing member 500. made including In addition, the frame 100 may include a guide bracket 110 , a clamping port 120 , and an unclamping port 130 , and the lifting cylinder unit 200 includes a lifting rod 210 , a lifting cylinder 220 . ), a lifting piston 230, an ascending hydraulic line 240 and a descending hydraulic line 250, the forward and backward cylinder unit 300 is also a forward and backward rod 310, forward and backward cylinder 320, It may include a forward and backward piston 330 , a left-moving hydraulic line 340 , and a right-moving hydraulic line 350 . In particular, the clamper 400 has a 'L' shape composed of a vertical side 410 and a horizontal side 420, and includes a forward and backward pin coupling hole 410, a lifting pin coupling hole 420, and an oblique guide hole 430. may include

First, the frame 100 has a rectangular block shape as a whole as shown in FIG. 4 , and various components to be described later are attached and coupled. Although not shown in the drawings, the frame 100 is provided with a base plate or a base block at the bottom, and is coupled to a table or workbench through this to move up and down or left and right.

As shown in FIGS. 4 to 6 , the lifting cylinder 200 is installed in a vertical direction inside the right side of the frame 100 , and the upper end of the lifting rod 210 penetrates through the upper surface of the frame 100 and is exposed. and go up and down As the name suggests, the lifting cylinder 200 has a structure in which a cylinder, a piston, and an in/out rod are lifted up and down according to the operation of hydraulic pressure.

For example, the elevating cylinder unit 200 includes the elevating cylinder 220 installed in the vertical direction on the right side of the frame 100 together with the elevating rod 210 and the elevating cylinder 220 vertically inside the elevating cylinder 220 . It is installed so as to be able to lift and includes a lifting piston 230 to which the lifting rod 210 is extended and coupled to the upper surface. At this time, the lifting hydraulic line 240 communicates with the lower part of the elevating cylinder 220 and moves the elevating piston 230 upward when hydraulic pressure is supplied, and the upper part of the elevating cylinder 220 communicates with the hydraulic pressure. and a descending hydraulic line 250 for moving the lifting piston 230 downward when supplying.

That is, when hydraulic pressure is supplied to the lifting hydraulic line 240 as shown in FIG. 5 , the lifting piston 230 moves upward, and the lifting rod 210 extended and coupled to the upper surface of the lifting piston 230 is also upward. will move to Conversely, as shown in FIG. 6 , when hydraulic pressure is supplied to the descending hydraulic line 250 , the lifting piston 230 moves downward, and the lifting rod 210 also moves downward.

As shown in FIGS. 4 to 6 , the forward and backward cylinder unit 300 is installed in the horizontal direction on the left side of the frame 100 , and the left end of the forward and backward rod 310 is the left side of the frame 100 . It penetrates and is exposed and moves back and forth. The forward/backward cylinder unit 300 has a structure in which the cylinder, the piston, and the lead-in/out rod move forward and backward according to the operation of hydraulic pressure, as the name implies.

For example, the forward and backward cylinder unit 300 includes a forward and backward cylinder 320 installed in a horizontal direction on the left side of the frame 100 together with a forward and backward rod 310 , and the interior of the forward and backward cylinder 320 . It is movably installed back and forth in the, and includes a forward and backward piston 330 to which the forward and backward rod 310 is extended and coupled to the left side. At this time, the left moving hydraulic line 340 communicates with the right side of the forward and backward cylinder 320 and moves the forward and backward piston 330 to the left when hydraulic pressure is supplied, and the left side of the forward and backward cylinder 320 . It communicates with and includes a right-moving hydraulic line 350 for moving the forward/backward piston 330 to the right when hydraulic pressure is supplied.

That is, as shown in FIG. 5 , when hydraulic pressure is supplied to the left moving hydraulic line 340 , the forward and backward piston 330 moves to the left, and the forward and backward rod extended and coupled to the left side of the forward and backward piston 330 . (310) is also moved to the left. Conversely, as shown in FIG. 6 , when hydraulic pressure is supplied to the right-moving hydraulic line 350 , the forward/backward piston 330 moves to the right, and the forward/backward rod 310 also moves to the right.

At this time, as shown in FIGS. 4 to 7, the clamper 400 has a '┏' shape composed of a vertical side 401 and a horizontal side 402, and is installed spaced apart from the frame 100 upward, and the vertical side ( The left end of the forward and backward rod 310 is pin-coupled to 401 , and the upper end of the lifting rod 210 is pin-coupled to the horizontal side 402 , so that the forward and backward movement of the forward and backward rod 310 and the lifting rod According to the ascending and descending of 210, it reciprocates in an oblique line from the upper left to the lower right.

Specifically, in the clamper 400, a forward/backward pin coupling hole 410 through which the left end of the forward/backward rod 310 is pinned by a forward/backward pin 411 is formed through the vertical side 401, and the A lifting pin coupling hole 420 through which the upper end of the lifting rod 210 is pin-coupled by the lifting pin 421 is formed in the horizontal side 402 . At this time, in order for the clamper 400 to reciprocate obliquely from the upper left to the lower right with respect to the frame 100 , each of the forward and backward pins 411 and 421 is a simple pin coupling, that is, a hinge coupling. It should not be done alone, and hinge slide coupling is required.

Accordingly, as shown in FIG. 7 , the forward/backward pin coupling hole 410 is a long hole extending up and down to the vertical side 401 so as to be movable up and down based on the forward/backward pin 411, and the lifting pin coupling The hole 420 is characterized in that it is formed as a long hole extending left and right on the horizontal side 402 so as to be movable back and forth with respect to the elevating pin 421 .

However, even in this case, since the vertical movement of the elevating rod 210 and the left and right movement of the forward/backward rod 310 do not perfectly match with each other, the clamper 400 may not be able to move smoothly in an oblique line. As shown, an oblique guide hole 430 may be formed in the clamper 400 , and a guide bracket 110 may be provided in the frame 100 .

That is, as shown in FIG. 7 , the clamper 400 has an oblique guide hole 430 formed obliquely from upper left to lower right on the horizontal side 402 to the left of the lifting pin coupling hole 420 . The guide bracket 110 is formed through, and the frame 100 is fixedly coupled to the upper left side as shown in FIGS. 4 to 6 , and is pin-coupled by the oblique guide hole 430 and the guide pin 431 . may include

Accordingly, as shown in FIG. 5 , when the lifting rod 210 moves up and the forward/backward movement rod 310 moves left, the clamper 400 moves along an oblique line from the lower right to the upper left with respect to the frame 100 . , As shown in FIG. 6 , when the lifting rod 210 descends and the forward and backward movement rod 310 moves rightward, the clamper 400 moves smoothly along an oblique line from upper left to lower right with respect to the frame 100 . will become

On the other hand, since the lifting cylinder 200 and the forward and backward cylinder 300 reciprocate the clamper 400 from the upper left to the lower right, when the supply and discharge of hydraulic pressure are interlocked and operated, for supply and discharge of hydraulic pressure The hydraulic port can be minimized, and there will be an effect of matching the operating time during interlocking operation.

Accordingly, the frame 100 includes a clamping port 120 and an unclamping port 130 for supply and discharge of hydraulic pressure on one side as shown in FIGS. 4 to 6 . At this time, the unclamping port 130 communicates with the rising hydraulic line 240 and the left moving hydraulic line 240 , and the clamping port 120 is connected to the descending hydraulic line 250 and the right moving hydraulic line 250 . communicate

Through this, the clamper 400, as shown in FIG. 5, when hydraulic pressure is supplied from the unclamping port 130, the hydraulic pressure is supplied to the rising hydraulic line 240 and the left moving hydraulic line 340 while the hydraulic pressure is supplied. By the rising of the lifting rod 210 and the left movement of the forward/backward rod 310 , it moves to the upper left side with respect to the frame 100 . At this time, hydraulic pressure is discharged to the descending hydraulic line 250 and the right moving hydraulic line 250 .

Conversely, as shown in FIG. 6 , the clamper 400 is the lifting rod ( 210) and moves to the lower right with respect to the frame 100 by the right movement of the forward/backward rod 310. At this time, hydraulic pressure is discharged to the rising hydraulic line 240 and the left moving hydraulic line 240 .

As shown in FIGS. 8 and 9 , a pressing member 500 is provided to fix the workpiece when the clamper 400 moves in an oblique line from the upper left to the lower right. That is, the pressing member 500 is fixedly coupled to the lower right end of the clamper 400 as shown in Figs. to clamp

Accordingly, as shown in FIGS. 6 and 9 , when hydraulic pressure is supplied from the clamping port 120 , the hydraulic pressure is supplied to the descending hydraulic line 250 and the right-moving hydraulic line 350 while the lifting rod 210 descends. And by the right movement of the forward/backward rod 310, the clamper 400 moves downwardly to the right with respect to the frame 100, and the pressing member 500 fixedly coupled to the lower right end of the clamper 400. is in contact with the work piece and clamps the work piece by pressing it downward.

In addition, as shown in FIGS. 5 and 8 , when hydraulic pressure is supplied from the unclamping port 130 , the hydraulic pressure is supplied to the rising hydraulic line 240 and the left moving hydraulic line 340 while the lifting rod 210 . The upward and leftward movement of the forward and backward rod 310 causes the frame 100 to move upward, and the pressing member 500 is separated from the work piece to unclamp the work piece.

As described above, in the workpiece clamping device according to the present invention, the '┏'-shaped clamper 400 reciprocates obliquely by the interlocking operation of the elevating cylinder 200 and the forward/backward cylinder unit 300 while reciprocating with a complicated shape. It is easily inserted into the side groove for the upper surface processing of the workpiece, in particular the side groove is formed, so that the workpiece can be fixed.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the protection scope of the present invention as long as it is apparent to those of ordinary skill in the art.

100: frame 110: guide bracket
120: clamping port 130: unclamping port
200: elevating cylinder unit 210: elevating rod
220: elevating cylinder 230: elevating piston
240: ascending hydraulic line 250: descending hydraulic line
300: forward and backward cylinder unit 310: forward and backward rod
320: forward and backward cylinder 330: forward and backward piston
340: left-moving hydraulic line 350: right-moving hydraulic line
400: clamper
401: vertical side 402: horizontal side
410: forward and backward pin coupling hole 411: forward and backward pin
420: lifting pin coupling hole 421: lifting pin
430: oblique guide hole 431: guide pin
500: pressure member

Claims (8)

frame and
a lifting cylinder part installed in the vertical direction inside the right side of the frame, the upper end of the lifting rod is exposed through the upper surface of the frame, and ascending and lowering up and down;
a forward/backward cylinder part installed in the horizontal direction inside the left side of the frame, the left end of the forward/backward rod is exposed through the left side of the frame to move forward and backward;
The frame is spaced apart from each other in a '┏' shape composed of a vertical side and a horizontal side, and the left end of the forward/backward rod is pin-coupled to the vertical side, and the upper end of the lifting rod is pin-coupled to the horizontal side. A clamper that reciprocates obliquely from upper left to lower right in accordance with the forward and backward movement of the forward and backward movement and the elevation of the lifting rod;
and a pressing member fixedly coupled to the lower right end of the clamper and in contact with the work when the clamper moves downward to the right to press and clamp the work downward.
According to claim 1,
The clamper is
A forward/backward pin coupling hole through which the left end of the forward/backward rod is pinned by a forward/backward pin is formed on the vertical side, and a lifting pin coupling hole through which the upper end of the lifting rod is pinned by a lifting pin on the horizontal side is penetrated. A workpiece clamping device, characterized in that formed.
3. The method of claim 2,
The forward and backward pin coupling holes are,
It is a long hole extending up and down on the vertical side so as to be movable up and down based on the forward and backward pins,
The lifting pin coupling hole,
A workpiece clamping device, characterized in that it is a long hole extending left and right on the horizontal side so as to be movable back and forth based on the lifting pin.
4. The method of claim 3,
The clamper is
An oblique guide hole formed through an oblique line from upper left to lower right is formed on the horizontal side to the left of the lifting pin coupling hole,
The frame is
A workpiece clamp device comprising a guide bracket fixedly coupled to the upper left side and pin-coupled by the oblique guide hole and the guide pin.
According to claim 1,
The lifting cylinder unit,
And a lifting cylinder installed in the vertical direction inside the right side of the frame,
an elevating piston which is installed to be able to elevate up and down inside the elevating cylinder, and the elevating rod is extended and coupled to the upper surface;
an ascending hydraulic line communicating with the lower part of the lifting cylinder and moving the lifting piston upward when hydraulic pressure is supplied;
and a lowering hydraulic line communicating with the upper part of the lifting cylinder and moving the lifting piston downward when hydraulic pressure is supplied.
6. The method of claim 5,
a forward and backward cylinder installed in the horizontal direction inside the left side of the frame;
A forward and backward piston which is installed movably back and forth inside the forward and backward cylinder, and the forward and backward rod is extended and coupled to the left side;
a left moving hydraulic line communicating with the right side of the forward and backward cylinder and moving the forward and backward piston to the left when hydraulic pressure is supplied;
and a right-moving hydraulic line communicating with the left side of the forward/backward cylinder and moving the forward/backward piston to the right when hydraulic pressure is supplied.
7. The method of claim 6,
The frame is
It includes a clamping port and an unclamping port for supply and discharge of hydraulic pressure on one side,
The unclamping port is
It communicates with the rising hydraulic line and the left moving hydraulic line,
The clamping port is
A workpiece clamping device, characterized in that it communicates with the down hydraulic line and the right moving hydraulic line.
8. The method of claim 7,
The clamper is
When the hydraulic pressure is supplied from the unclamping port, the hydraulic pressure is supplied to the rising hydraulic line and the left moving hydraulic line, and the lifting rod moves upward and leftward based on the frame by the left movement of the forward and backward rod,
When hydraulic pressure is supplied from the clamping port, the hydraulic pressure is supplied to the descending hydraulic line and the right-moving hydraulic line, and the lowering of the lifting rod and the right movement of the forward/backward rod move downward to the right with respect to the frame. Workpiece clamping device.

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