KR100435619B1 - Automatic centering double facing machine - Google Patents

Abstract

The present invention relates to a two-end machine for chamfering or knurling work on both ends of a workpiece such as a pipe or a round bar,

When clamping circular workpieces of different diameters, the center of the workpiece is clamped accurately, and the upper and lower clamp links, two connecting links, and guides are used to prevent the workpiece from shaking due to the impact generated by processing the workpiece. The present invention relates to a double-end machining machine having a clamping device to which a force-mechanism is applied.

In detail, the clamp cylinder for operating the guide roller is mounted on the upper part of the clamping device frame so that the center of the work piece can be automatically centered at the center of the line between the two tools even if the work piece such as pipe or round bar is different. A guide and a guide roller are connected to the lower end of the frame, and the guide roller connects one groove of two connection links A and B, respectively, and the upper and lower clamp links each of which has an upper and lower jaw formed in the other groove of the connection link. Configure the connection,

When alternating workpieces of different lengths, the finger cylinder and the supply air cylinder are positioned so that the centers of the workpieces are connected to the upper and lower jaws at the center of the line connecting the left and right clamping tools. An object of the present invention is to provide a self-aligning double end processing machine having a workpiece feeder including a proximity sensor.

Description

Automatic centering double facing machine

The present invention relates to a two-end machine for chamfering or knurling work on both ends of a workpiece such as a pipe or a round bar,

When clamping circular workpieces of different diameters, the center of the workpiece is precisely clamped, and the upper and lower clamp links, two connecting links, and guides are used to prevent the workpiece from shaking even when the workpiece is impacted. The present invention relates to a double end processing machine equipped with a clamping device using a force-mechanism.

Referring to FIGS. 1 and 2, a clamping device applied to a conventional general double-end machining machine is as follows.

The clamping device of the machine tool for nerring or chamfering controls the operation by a sequence circuit. The jig 50 (Jig) clamping the workpiece 2 is fixed to the top of the bed 1 with a fixed V block 10. ) And the movable V block 20 attached to the end of the clamp cylinder 31, and the movable V block 20 and the fixed V block 10 move forward by the clamp cylinder 31 to the fixed V block 10. The workpiece 2 is clamped in between,

A feeder consisting of a feeder 40 and a separator cylinder 41 to supply the workpiece 2 to the jig 50 one by one, an ejector 30 for ejecting the processed workpiece 2 and the blood It consists of motors 8 and 9 and work tools 3 mounted on upper left and right sliders 5 and 6 on both sides of the jig 50 for processing the workpiece 2.

When a workpiece (2), such as a pipe cut short in the workplace, is to be bitten by a chamfering or nuring machine tool, a jig (50) is generally used, and the workpiece (2) is connected to the feeder (40). When the cylinder V is aligned with the separator cylinder 41 and one by one is inserted into the movable V block 20 attached to the end of the clamp cylinder 31, the clamp cylinder 31 is advanced to the fixed V block 10 so that the workpieces 2 are on both sides. Clamping is performed between the V blocks and chamfering or nuring is performed by the two-sided tools 3 operated by the driving force of the motors 8 and 9. However, when the work on the workpiece (2) of a certain diameter is finished and the workpiece (2) having a different diameter must be worked, the position of the fixed V block 10 fixed to the upper side of the bed (1) to the workpiece (2) ), Ie, loosen the fixed V-block (10) bolted onto the slider (5), center it with the adjustment handle (11) to correspond to the workpiece (2) and then again. As a method of assembling and processing, eventually, the position of the jig 50 is manually adjusted according to the diameter of the workpiece 2 to correspond.

Thus, the position of the fixed V block 10 so as to accurately match the center line of the workpiece (2) to be caught by the jig 50 according to the diameter of the workpiece (2) to the horizontal center of the line between the two work tools (3). To adjust the fixed V block 10 to adjust the centerline accurately to the center line is a very demanding task, even a skilled worker and takes a lot of time.

If the fixed V block 10 is not correctly aligned with the center line of the workpiece 2, the workpiece 2 is clamped to the jig 50, such as kneading or chamfering both ends of the workpiece 2; When the work is performed, the left and right tools 3 (Tool) unevenly process the ends of the work piece 2, and a defective product is generated, and the impact caused by the work is applied to the work piece 2 bitten by the jig 50. The greater the wear, the more the wear of the jig 50 is increased, causing the problem that the jig 50 needs to be replaced frequently.

In addition, as described above, in many cases, workpieces 2 having different lengths as well as diameters are alternately processed in a nuring operation. In this case, the centers of the workpieces 2 are centered with respect to the lengths of the workpieces 2, respectively. The process to accurately fit the center of the line between the (10, 20) should be carried out, the feed passage 40 leading to the jig 50 and the feeder 40 for aligning the workpiece (2) to the jig 50 and the transferred Since the above process cannot be performed in the conventional clamping device composed of the separator cylinder 41 which separates and puts the workpieces 2 into the jig 50 one by one in order to work sequentially, the left and right tools 3 When the workpiece (2) is processed by the left and right of the workpiece (2) was unevenly processed, there was a problem that a lot of defective products are generated.

The present invention is to solve the above problems,

Clamp cylinder for operation of guide roller is mounted on the upper part of clamping device frame so that the center of the work piece can be automatically centered at the center of the line between the two tools even if the work piece such as pipe or round bar is different. The guide and the guide roller are connected to the lower end of the frame, and the guide roller connects one groove of two connection links A and B, respectively, and connects the upper and lower clamp links formed with upper and lower jaws to the other groove of the connection link, respectively. Make up,

When alternating workpieces of different lengths, the finger cylinder and the supply air cylinder are positioned so that the centers of the workpieces are connected to the upper and lower jaws at the center of the line connecting the left and right clamping tools. An object of the present invention is to provide a self-aligning double end processing machine having a workpiece feeder including a proximity sensor.

1 is a side view of a machine tool equipped with a conventional clamping device

Figure 2 is a front view showing a conventional clamping device

Figure 3 is a side view of a machine tool equipped with the present invention self-aligning clamping device

4 is a cross-sectional view showing an operating state of the self-aligning clamping device of the present invention.

5 is a detailed view of the main portion of the power mechanism of the present invention.

Figure 6 is a main portion of a detailed view showing an embodiment of another power mechanism of the present invention

7 is a detailed view of the main portion of the finger cylinder of the present invention self-aligning clamping device

* Description of the main symbols in the drawings

1: Bed 2: Workpiece 3: Tool

5: left slide 6: right slide 8, 9: motor

10: fixed V block 11: adjusting handle 15: fixed bolt

20: Moving V block 30: Ejector 31: Clamp cylinder

40: feeder 41: separate cylinder 50: jig

100: clamping device 101: clamp cylinder 102: guide roller

103: guide plate 110: connection link A 111: connection link B

120: upper clamp link 121: upper grandfather 130: lower clamp link

131: lower type grandfather 140: fastening member 200: supply air cylinder

201: Bracket 210: Operation link 220: Finger cylinder

240: proximity sensor 250: separator cylinder

Hereinafter, the configuration of the self-aligning double end processing machine of the present invention.

1 is a side view of a machine tool equipped with a conventional clamping device,

Figure 2 is a front view showing a conventional clamping device,

Figure 3 is a side view of a double-end machining machine equipped with the present invention self-aligning clamping device,

4 is a cross-sectional view showing an operating state of the self-aligning clamping device of the present invention;

5 is a main detail view of the power supply mechanism of the present invention,

Fig. 6 is a principal detail diagram showing an embodiment of still another power mechanism of the present invention;

Figure 7 is a detailed view of the main portion of the finger cylinder of the present invention self-aligning clamping device.

In both ends of pipe or round bar chamfering or knurling processing,

The operation of the clamping device 100 is controlled by the sequence circuit,

When alternately clamping circular workpieces of different diameters, to accurately clamp the center of the workpiece 2 and to prevent the workpiece 2 from shaking due to the impact of the tool 3 during processing,

Install the clamp cylinder 101 on the upper part of the clamping device frame,

The guide roller 102 is screwed to the end of the clamp cylinder 101, and a guide plate 103 for guiding the guide roller 102 is installed under the frame, and the guide roller 102 is connected to both grooves. The connection link A (110) and one side of the connection link B (111) of the connecting groove and the pin,

The other connection grooves of the connection link A (110) and the connection link B (111) are rotatably connected to the connection grooves and pins of the upper clamp link (120) and the lower clamp link (130), respectively.

An upper groove portion 121 having a V-block shape is formed at one side of the lower clamp link 130, and the fixing groove formed in the center and the upper clamp link 120 fixing groove are fixed pins 135 inside the clamping device frame. (135) fixed to the hinge about the axis, and the end groove formed on the other side is connected to the connecting link 110, 111 and the end groove by the pin,

When the workpiece 2 is supplied to the upper and lower jaw portions 123 and 131 through a supply device, the clamp cylinder 101 operates downward to raise the upper and lower clamps around the fixing pin 135. As the link 130 is hinged, the workpiece (B) is formed between the V block-shaped upper jaw portion 121 formed on one side of the upper clamp link 120 and the lower V jaw formed on the lower clamp link 130. 2) is configured to clamp,

In addition, the upper and lower jaw portions 121 and 131 which are in actual contact with the workpiece 2 are manufactured as unit parts so that they can be replaced when worn or damaged, and fastening grooves are formed in the upper and lower clamp links 120 and 130, respectively. Formed to form a coupling member 140,

To always coincide with the center of the length of the workpiece (2) to the center of the line connecting the two tools (3),

A supply device for supplying the workpiece 2 to one side of the clamping device frame is installed, and a separator cylinder 250 for supplying the workpiece 2 to the finger cylinder 220 one by one is installed on one side of the lower frame of the guide. Proximity sensor 240 for detecting the workpiece 2 to operate the supply air cylinder 200, the finger cylinder 220, the separator cylinder 250 is installed at the lower end of the guide,

A bracket 201 having a connection groove 202 formed on the top of the clamping device 100 frame is installed, a supply air cylinder 200 is mounted on the connection groove 202, and an end connection portion of the supply air cylinder 200 is connected to the end of the clamping device 100. Connect the operation link 210 to the frame connecting groove 205 with a pin to rotate the frame connecting groove 205 with the hinge axis to grip the workpiece 2 at the end of the operating link 210 to connect the frame. It is configured by connecting and installing the finger cylinder 220 to be supplied to the jaw (Jaw) by rotating around the groove 205 axis.

An embodiment of the self-aligning clamping device 100 configured as described above will be described with reference to the drawings.

(Power mechanism)

First, in the case of alternating circular workpieces of different diameters, the center of the workpiece (2), i.e., the center of the circle, coincides with the center of the line segment connecting the two tools (3) at the top of the bed. Toggle-Mechanism is applied as shown in FIGS. 4 and 6 to clamp, and the force mechanism has a guide roller 102 and a linking link A (110) facing left and right about the guide roller 102. ) And one side groove of the connection link B (111), and connecting the upper and lower clamp links (120, 130) to the other grooves of the connection link A, B (110) (111) by a pin, the clamping device (100) ) The fixing groove 134 is formed inside the frame to fix the fixing groove and pin 135 of the upper and lower clamp links 120 and 130 to clamp the upper and lower clamp links 120 and 130 and the connecting links 110 and 111. The fixed groove 134 or pin 135 is configured to be a fixed hinge point when operated by the cylinder 101. The upper and lower jaw portions 121 and 131 formed on one side of the upper and lower clamp links 120 and 130 are opened and closed about the center line connecting the two tools 3 to clamp the workpiece 2. .

(Detachable grandfather)

And the jaws (121, 131) is in contact with the workpiece (2) to be clamped, the physical force is applied a lot to the workpiece (2) during processing by the tool (3) and the impact, Wear occurs on the lower jaw (121) (131) and when the degree of wear is severe, each of the upper and lower clamp links (120, 130) must be replaced all the upper and lower jaws (Jaw) to prevent this The upper and lower jaw parts 121 and 131 are worn when the upper and lower jaw parts 121 and 131 are worn when the parts 121 and 131 are manufactured as separate components and assembled by coupling the upper and lower clamp links 120 and 130 to the body. Only the jaws 121 and 131 may be replaced separately.

(Finger cylinder)

In addition, when alternating the workpieces 2 having different lengths as well as the diameters of the workpieces 2 as described above, the centers of the lengths of the workpieces 2 and the centers of the segments connecting the two tools 3 always coincide with each other. As applied to the finger cylinder 220, the finger cylinder 220 is configured as shown in FIG. Briefly describing the operation state, when the finger cylinder 220 moves to (A) Port, the finger of the finger cylinder 220 picks up the workpiece (2) by the interlocking connection link. Will be opened to place the workpiece (2).

First, the supply device for aligning and supplying the workpiece 2 to one side of the clamping device frame is installed, and the separator cylinder 250 and the proximity sensor 240 are installed at the end of the supply device. Is detected by the proximity sensor 240 and the separator cylinder 250 pushes the workpiece 2 to the finger cylinder 220 one by one by the controller of the sequence circuit, and the operation link 210 by the supply air cylinder 200. Finger cylinder 220 to move the connecting groove 205 of the shaft to the workpiece (2) is moved, the finger cylinder 220 is moved to the cylinder (A) Port finger is the workpiece (2) ), The finger cylinder 220 is the upper and lower jaws (upper and lower jaw) of the upper and lower clamp links by the axis of the connection groove 205 of the operation link 210 by the operation of the supply air cylinder (200) When the rotational movement toward 121, 131 and the jaw (121, 131) is reached, the finger cylinder 220 The cylinder moves to (B) Port to supply the workpiece (2) to the upper and lower jaws, and when the clamp cylinder (101) moves downward, the link link (A) linked to the guide roller (102). , B (110,111) and the upper and lower clamp links (120,130) by operating the fixing groove 134 as a hinge shaft is to be clamped the workpiece (2) between the upper and lower jaws (121, 131). .

And as another embodiment of the present invention,

First, the shape of the lower jaw portion 131 of the lower clamp link 130 to form a V block in a straight block to facilitate the discharge of the workpiece 2,

As described above, when the shape of the lower jaw portion 131 is a straight block shape from the V block shape, the workpiece 2 processed through the outlet after the work of the workpiece 2 is finished by the tool 3 is finished. This makes the discharge easier.

Second, in the width direction by forming a fastening groove in the side of the jaw (121) 131 so as to expand the width of the jaw (121) 131 according to the size of the workpiece (2) Jaw sub-supports can be separated or combined with fastening members. When working with large workpieces 2, the jaw sub-supports are bolted to the left and right sides of the jaw base. Combination will be able to hold the workpiece (2) more firmly, on the contrary, in the case of the workpiece (2) having a small diameter to separate the grandfather subsidiary to work only with the jaw base body. In particular, the jaw portion of the various widths (Jaw) is provided to facilitate the work of the workpiece (2) of various sizes.

Finally, the overall operating state of the present invention will be described.

When the workpiece 2 is supplied by a feeder for aligning and supplying the workpiece 2 by a sequence circuit, the clamping device 100 applied to both ends of the machine is sensed by the proximity sensor 240 and the separator. When the cylinder separates the workpiece 2 one by one, the finger cylinder 220 grips the center line with respect to the length of the workpiece 2 so that the supply air cylinder 200 rotates about the hinge axis of the operation link 210. When the movement is supplied to the jaw portion of the force-mechanism applied to the present invention, the clamp cylinder is operated in the downward direction so that the guide roller 102 fixes the transmission links A, B and the upper and lower clamp links. By moving the pin as a hinge point, the workpiece 2 supplied to the upper and lower jaws is clamped.

The left and right slides of the upper part of the bed are advanced toward the clamping device, and the nuling or chamfering work is performed by the work tool (3) mounted on the slides.After the finishing work, the left and right slides are reversed, and the processed work piece ( 2) goes down the outlet and stored in the product box.

The effects of the present invention as described above are as follows.

When machining several workpieces of different diameters or lengths, even if the workpieces 2 have different diameters or lengths, the centerline with respect to the length or width can be precisely adjusted without additionally adjusting the clamping device. By being able to fit, even inexperienced workers can easily operate the two-end processing machine to which the present invention is applied, thereby lowering the product defect rate and improving productivity.

In addition, the width of the V-block can be adjusted according to the size of the workpiece (2) to facilitate the processing of the workpiece (2) of different lengths or widths, if the shape of the rough portion of the lower clamp link to form a straight line It will be easier to discharge the finished product.

Claims (3)

In both ends of pipe or round bar chamfering or knurling processing, The operation of the clamping device is controlled by the sequence circuit, When alternately clamping circular workpieces of different diameters, to accurately clamp the center of the workpiece 2 and to prevent the workpiece 2 from shaking due to the impact of the tool 3 during processing, Install the clamp cylinder 101 on the upper part of the clamping device frame, The guide roller 102 is screwed to the end of the clamp cylinder 101, and a guide plate 103 for guiding the guide roller 102 is installed under the frame, and the guide roller 102 is connected to both grooves. The connection link A (110) and one side of the connection link B (111) of the connecting groove and the pin, The other connection grooves of the connection link A (110) and the connection link B (111) are rotatably connected to the connection grooves and pins of the upper clamp link (120) and the lower clamp link (130), respectively. The upper jaw of the V-block shape is formed on one side of the lower clamp link 130 and the fixing groove formed in the center and the upper clamp link 120 fixing groove are fixed pins 135 to the inner side of the clamping device frame. (135) It is fixed to the hinge around the axis, and connected to be rotated by the pin and the silver link link groove formed on the other side, When the workpiece 2 is supplied to the upper and lower jaw portions 131 through a supply device, the clamp cylinder 101 operates downwardly, and the upper and lower clamp links 120 are formed around the fixing pin 135. 130 is hinged between the upper block jaw portion 121 of the V-block shape formed on one side of the upper clamp link 120 and the lower V jaw formed on the lower clamp link 130. 2) Self-aligning double end machining machine characterized in that configured to be clamped. The method of claim 1, The upper and lower jaws, which actually come into contact with the workpiece 2, are made of unit parts so that they can be replaced when they are worn or damaged, and a fastening groove is formed in the upper and lower clamp link bodies to the fastening member 140. Self-aligning double end processing machine characterized in that the combined configuration. The method according to claim 1 or 2, To always coincide with the center of the length of the workpiece (2) to the center of the line connecting the two tools (3), A supply device for supplying the workpiece 2 to one side of the clamping device frame is installed, and a separator cylinder 250 for supplying the workpiece 2 to the finger cylinder 220 one by one is installed on one side of the lower frame of the guide. Proximity sensor 240 for detecting the workpiece 2 to operate the supply air cylinder 200, the finger cylinder 220, the separator cylinder 250 is installed at the lower end of the guide, Install a bracket having a connection groove 202 formed on the upper end of the clamping device frame, mount a supply air cylinder 200 in the connection groove 202, and connect the end portion of the supply air cylinder 200 to the frame connection groove 205. The linking link 210 with a pin to rotate the frame connecting groove 205 to the hinge axis to grip the workpiece (2) at the end of the operating link 210 to the center of the frame connecting groove 205 axis Self-aligning type both end processing machine, characterized in that configured to be installed to connect the finger cylinder 220 to supply to the jaw (Jaw) by the rotation movement.