KR20020076982A - Tube cutting apparatus - Google Patents

Abstract

PURPOSE: A tube cutter is provided to rapidly and precisely cut a tubular stock without twisting the tubular stock and to reduce the maintaining cost of the tube cutter by simplifying the structure of the tube cutter. CONSTITUTION: A tube cutter includes a base. The base has a table(20) including supporting legs(21) and braces(22). A main frame is fixed to a common base plate(27) and a side plate by means of a bolt(26). A pair of blocks(24,25) are fixed to the table(20). The first double acting hydraulic cylinder(30) is fixed to a lower portion of the table(20) by supporters(31). A piston screw(33) is attached to a cylinder piston. The second double acting hydraulic cylinder is horizontally mounted on an upper portion of the table(20) by supporters. The side plate is fixed by a coupling member.

Description

Tube Cutting Machine {TUBE CUTTING APPARATUS}

The present invention relates to a tube cutting device used to cut a metal pipe or tube that is a tubular stock.

Although various types of cutters are known in the related art, although these cutters have a complicated structure, there is a problem in that cutting is not performed well.

The present invention to solve the above problems,

① Small size and simple form to minimize the loss of material, to cut the tubular stock quickly and accurately, without the distortion and scratches of the tube, and to operate by fluid pressure, to reduce the cost of operation and maintenance It is to provide a device made of.

② Once the cutting operation is completed, the stock is supplied to the cutting position, and several operating parts can be linked to each other to enable the shearing mechanism according to the metal supply. .

Furthermore, the shearing strokes are placed horizontally with each other, resulting in a cutting mechanism capable of executing multiple cutting strokes. The stock is cut in part by minimizing the deformation of the stock by placing the first stroke at a predetermined limit. The aim is to provide a fluid pressure operated apparatus in which the longitudinally lying parts of the stroke remain in perfect connection with the cutting operation during the second stroke.

③ It can be adjusted according to the thickness of the stock to cut the effective length of the strokes of the hydraulic cylinder that operates the cutting mechanism, and provides a hydraulically operated cutting device that can cut various sizes of stock cleanly without distortion. It is.

FIG. 1 shows a general arrangement of a fluid pressure operated tube cutting apparatus made in accordance with the present invention, in a side view (vies in side elevation) of a vertical section.

FIG. 2 is a plan view, in which the device of FIG. 1 is cut horizontally. FIG.

3 is a front elevational view of the device in FIG.

4 is an enlarged detail view of the device in the same direction as in FIG. 3, eliminating the front half of the main frame.

FIG. 5 is a horizontal cross section through the main frame on line 5-5 of FIG. However, the inner cutters and the supporting mandrel of the cutter are not shown here.

FIG. 6 is an enlarged fragmentary view of FIG. 1 showing a limit switch arrangement used in one of the hydraulic cylinders. FIG.

Figure 7 is a view similar to Figure 6 showing the limit switch arrangement for other inlet cylinders.

8 is a cross-sectional view taken along the line 8-8 of FIG.

9 and 10 are enlarged cross-sectional views of FIG. 8 illustrating the movement of the cutting members during operation of the device.

11 is a cross-sectional view taken on line 11-11 of FIG. 10 showing stock at the end of the first cutting stroke of the device.

12 is a cross-sectional view taken on line 12-12 of FIG. 8 showing the mechanism for supporting the mandrel when no stock is in the device.

13 is a detailed plan view showing the mechanism of FIG.

Figure 14 is a detailed view of the side view showing a stop mechanism for placing the stock in the cutting position in the apparatus.

15 is a cross-sectional view taken along the line 15-15 of FIG.

16 is a cross-sectional view taken along the line 16-16 of FIG.

Figure 17 is a cross sectional view of the side view showing an adjustable portion of the support mechanism for the mandrel.

18 is a cross-sectional plan view of the mechanism of FIG.

19 is a cross-sectional view taken along the line 19-19 of FIG.

FIG. 20 is a cut away on line 20-20 of FIG. 21 showing a portion of the stock feeding mechanism of the device.

21 is a plan view of the mechanism of FIG.

FIG. 22 is a side view of the parts shown in FIGS. 20 and 21.

Figure 23 is a schematic view that schematically illustrates the hydraulic system used to operate the device.

24 is a wiring diagram.

Explanation of symbols for the main parts of the drawings

20: table top

21: support angle

22: brace

24: block

25 blocks

27: base plate

28: side plate

30: cylinder

31: support

33: Piston screw

35 cylinder

36: support

37: fastener

38: Piston screw

40: screw color

41: locking screw

42: flange

44: operation lever

45: limit switch

46: bracket

50: screw color

51: flange

52: shaft operation lever

55: limit switch

56: bracket

60: chamber

65: carrier member

66: carrier member

67 tongue

68 tongue

69: To Guide

70: cradle member

71: cover plate

75 rib (ribs)

77: cradle member

80: passage

81: passage

82: Lubrication Fitting

85: home

86: passage

99: stock

100: fixed die

101: Punch

102 die

103: Punch

105: supplementary taper sheet

106: height bolt

107: end plate

108 bushing

109 Nut

110: expansion hole

111: Mandrel

112: relaxation unit

113: extension rod

114: bracket

115: channel

116: fluid color

120: pipe

121: Edition

122: rod

123: screw hole

125: rod

126: Edition

127: Breathing Member

130: M-shaped parts

131: pin

132: pin

133: sleeve

135: Stop bolt

136: extension arm (ARM)

140: height bolt

141: spring

142: pilot member

145: center hole

146: CAM TEETH

147: V-groove

150: bracket

151: Bolt

152: H type member

153: axis

154: pin

155: Information Wheel

156 washer

157: bolt mechanism

158: axis

160: rod

161: bracket

162 fixing screw

163: open thread

164: Clamp Block

165: Edition

166 bolt

167: slot

168: Stop bolt

170: kidney finger

171: block

172: shoulder bolt

173: blocks

174: shaft pin

175: slot hole

176: spring

177: pin

178: spring

179: shoulder

180: limit switch

181: operation button

183: L-shaped slide

184: Edition

185: Bolt

186: slot

187: spring

188: lever arm

189 CLEVIS

190: solenoid

191: armature

193: cam

194: nose cam part

195: cam surface

196: extension

198: slot mounted

199: Arrangement bolt

200: carriage

201: roller

202: rail

203: support

205: York section

206 block

207: Bolt

208: slot

210: Pusher

212: catch member

213: spring

215: reverse switch

220: drive motor

221: toothed chain

222: floating tooth

225: pump

226: supply tank

227: motor

230: 4-way valve

231: solenoid

232: solenoid

233: check valve

234: pressure reducing valve

235 drain

236: relief valve

237: Needle Valve

240: button switch

242: relay

243: relay

245: switch

250: limit switch

252: adjustment relay

253: safety switch

254: bracket

255: Solenoid Valve

256: cutout

257 cutout

260: relay

261: valve

Referring to the drawings illustrating a preferred invention use structure, the base of the device is constituted by a table 20 with supporting legs 21 and braces 22. Able to know.

The mainframe of the device is secured by bolts 26, which are fixed to a common base plate 27 and side plate 28 or to a table top 20. (24) and (25). Double-acting hydraulic cylinder (30) is fixed to the lower side of the table top surface 20 by the support (31), the piston of the cylinder includes a piston screw (33).

A similar double-acting hydraulic cylinder 35 is mounted horizontally on the upper portion of the table top surface 20 by the support 36, and is fastened to the side plate 28 by a fastener 37. The piston of the cylinder 35 includes a piston screw 38 similar to a threaded extension 33. The cylinders 30 and 35 are arranged in such a way that the working strokes of the pistons can be executed in the vertical and horizontal directions, respectively.

The piston extension 33 has a threaded collar 40 mounted below the base plate 27 to provide a positive positive limit to the effective stroke of the cylinder 30. provide a stop).

A threaded mounting of collar 40 is adjustable on the piston screw 33 and is provided with one or more locking screws 41 to hold the adjusted position.

In particular with reference to FIG. 6, a screw collar 40 is also provided with a flange 42, which is positioned to engage the operating lever 44, on which the table top is placed. A limit switch 45 accompanied by a bracket 46 at the bottom of the 20 is mounted.

The piston screw 38 includes a flange 51 (FIG. 7) which carries a similar threaded collar 50 and is adapted to engage a pivoted operating lever 52 for the limit switch 55. This shaft actuating lever 52 is accompanied by a bracket 56 mounted under the cylinder 35 on the table top surface 20.

Blocks 24 and 25 are designed to mount a chamber 60 for the cutting mechanism of the device, which includes a pair of carrier members actuated by cylinders 30 and 35 ( 65 and 66 are mounted (FIGS. 5 and 8).

Carrier member 65 includes tongue portions 67 and 68 located opposite, which are guide ways made by cooperating portions of blocks 24 and 25. Guided for lateral sliding movement at 69.

The tongue portion 67 is connected to a hook-lkie member 70 fixed to the end of the piston screw 38. On the opposite side of the frame, the guideway 69 for the tongue 68 appears to be closed by a cover plate 71 (FIG. 4).

The carrier member 66 is mounted for vertical sliding movement and side sliding movement in the carrier member 65. As shown in Fig. 5, the carrier member 65 surrounds both sides of the carrier member 66, and has a pair of ribs 75 which cooperate with an inner face of the frame member that traps the carrier member 66. Was done with.

The tongue portion 76 extending downward on the carrier member 66 is connected to a hook portion on the rib member 77, which is similar to the rib member 70, and is a piston operated by the cylinder 30. It is connected with the screw 33.

As shown in FIG. 4, tongue portion 76 extends through passage 80 of block 25, which is considerably wider than tongue portion 76, which is responsible for the lateral motion of carrier members 65 and 66. To allow it.

Chamber 60 is mounted so that lubricant can be filled through passageway 81 and is suitable for lubricating fittings 82. The two carrier members are provided with grooves 85 and ducts to prevent lubrication and the back pressure of the lubricant, which may interfere with the movement of these parts. 86).

The cutting member for stock consists of two pairs of inner and outer cutters, each of which has an inner punch mounted for insertion into the stock, and a pair of inner and outer cutters to enclose the stock and punch. Continuous annular dies are included. In the figure, the stock is labeled 99 so that the two pairs of cutters include a stationary die 100, a punch 101, a movable die 102 and a punch 103.

The fixed die 100 is configured with a tapered rearward end touching the complementary tapered seat 105 on the inner surface of the block 25, the fixed die 100 having an end plate. (end plate) 107, bushings 108 and nuts 109 are secured by elongated bolts 106 cooperating.

The end plate 107 constitutes a guide maintaining cutter 102 in a suitable arrangement relationship between the cutting plane and the adjacent cutting plane of the stationary die 100, and the bushing 108 extends within the flow die 102. It enters into an enlarged bores 110 and the bushing length is much greater than the thickness of the flow die 102. For example, the minimum operating clearance to allow relative movement of the die is 0.002 inches.

The punch 101 is a mandrel 111 holding the stock to be cut or an intergal end plate of the mandrel, the length of which is quite large. For example, the plurality of relieved portions 112 may be at least two feet in length to receive dirt or foreign matter that may be in the stock.

The other end of the mandrel 111 is connected to one end of an extension rod 113 adjusted to the desired length, and for the 10 foot size the other end of the extension rod 113 is a channel. Supported by bracket 114 at the end of 115 or at any other suitable extension of table top 20.

The mandrel 111 depends on the size of the tubestock to be cut, but the diameter of the extension rod 113 may be relatively small and the movable collars of various outer diamenters adapted to different sizes of mandrel and stock. collars) 116.

It is of utmost importance to establish the proper rigidity and exact center of the structure supporting the mandrel 111 and the stock. In particular, referring to Figures 1, 17, 18 and 19, the support structure includes a pipe 120, which is mounted on a pair of plates 121 fixed to the tape top surface 20.

The bar 122 is welded along the side of the pipe 120 and has multiple tapped holes 123, which are vertically arranged bars 125. Vertical mounting rods are provided with bracing members 127 and welded to a horizontally extending plate 126.

The front end of the rod 125 supports an M-shaped part 130 that is pivoted by a pin 131 at the end of the plate 126. The front end of the M-part 130 carries a pin 132, which is a sleeve mounted to form a direct support for the stock 99 on the mandrel 111. 133 and bushing.

The M-shaped part 130 is adapted to be vertically adjusted with respect to the pin 131, which accurately and vertically positions the sleeve 133 at the center of the mandrel 111 and allows the stock to correspond to the cutting members. It is to.

A stop bolt 135 that is adjustable for this purpose is mounted on the front end of the bar 125 and on the extension arm 136 on the M-part 130. Adjacent. The brackets 114 together with the cutting members are adjustable as required in the initial arrangement of the extension rods 113.

The movable punch 103 is mounted on the punch 101 by an elongated bolt 140 associated with a spring 141 and a pilot member 142. The punch 103 is drilled with a large central bore 145 to allow for the movement of the lateral moving punch in relation to the extension bolt 140.

In general, these two punches will maintain a properly aligned relationship by stock as shown in FIG. 9, but if desired, the pilot member 142 can be configured to provide automatic centering action on the punch 103. A plurality of relative flat cam teeth in conjunction with complementary shaped V-grooves 147 at the outer end face of the punch 103 may be used. Only by 146).

If there is a stock in the device, the punch and die are adapted to interlock with each other so that the mandrel and the punch remain in the center position. However, if there is no stock in the device, the mandrel tends to go down until the punches 101 and 103 rest on the die associated with the punch, which is to ensure that the mandrel is not always out of center position in the device. Adjustable supports are mounted to the rear of the block 25 as in 8, 12 and 13. The support 150 is equipped with a bracket 150 fixed to the rear of the block 25 by a bolt 151.

The bracket 150 pollutes an H-shaped member 152, which is connected to the shaft 153 and carries a pin 154 at its outer end. The pin 154 is used to mount a pair of square guide wheels 155.

Washers 156 on the pins 154 correctly position the guide wheel 155 in the axial direction to engage the mandrel 111 when there is no stock in the device.

The adjustable spring and stop bolt mechanism 157 rotates on the shaft 158 and the H-shaped member 152 rotates to the mandrel to place the punch 101 in the center of the device if there is no stock in the die as shown in FIG. It is biased upwards out of the correct support position.

When the stock is inserted from left to right as shown in Figure 8 is engaged with the guide wheel 155 and the H-shaped member 152 is pressed toward the support spring.

Figures 14-16 illustrate a stop mechanism that can be used with the apparatus to place the stock in the correct cutting position, which is omitted in Figure 1-3 for a more concise and clear explanation.

Rods 160 are mounted on frame blocks by brackets 161, which have clamping screws 162 and opening screws 163. Comes with The rod 160 extends in a protruding form and is associated with the front of the device and is used for the clamp block 164.

Clamp block 164 is mounted so that it can be adjusted vertically by bolts 166 located in slots 167, which slot 168 is a stop bolt at the top of plate 165. (stop bolt) 168.

The lower end of the plate 165 involves a stop mechanism, which includes an elongated finger 170 that is carried at the forked lower end of the block 171. Block 171 is mounted to allow limited pivotal movement on shouldered bolt 172 sets in block 173 that are bolted to plate 165.

A pivot pin 174 used for the extension finger 170 is mounted in the block 171 and enters into a slotted hole 175. The slot hole 175 is in the extension finger 170 to allow the longitudinal and pivoting movement of the finger in conjunction with the block 171.

The pair of springs 176 carried by the block 171 are intended to be associated with the pins or other pins 177 on the extension finger 170, which makes the fingers point to the right as shown in FIGS. In the end, it is aimed at the stock of Diane.

As shown in Figure 14, an additional spring 178 in block 171 causes the extension finger 170 to be biased in a clockwise direction and contact this rearward end of the finger with the shoulder 179 in block 171. It can be limited within a certain range.

Block 171 also entails a limit switch 180, which has been omitted for a more concise description in Figure 14, and as shown in Figures 14 and 16 the movement of the finger toward the spring 176 is restricted from right to left. If in range, the operating button 181 is placed in an engaged position to be operated by a pin 177 mounted on the extension finger 170.

The block 173 also carries an L-shaped slide 183 which is vertically slid by a plate 184 operating in a slot behind the block 173. It is mounted to allow movement and is connected to the L-shaped slide 183 by bolts 185 provided with spacer bushings operating in slots 186 in block 173.

The L-shaped slide 183, which is generally biased to the top position of the block 173 by one or more springs 187, can be moved downwards relative to the springs by a lever arm 188. have.

This lever arm 188 is mounted on the clevis 189 carried by the plate 165 so as to be able to swing. One end of the lever arm 188 extends through additionally arranged slots in the slot 186 and the plates 165 and 184, the lever being driven by a solenoid 190 mounted behind the plate 165. Arranged to move. At this time, an armature 191 pivoting around the lever arm 188 is mounted.

L-shaped slide 183 carries a cam 193 mounted on an outer side, which has a pair of nose-like cam portions 194. Nose cam portion 194 is associated with a replaced cam faces 195 at the fork portion of block 171.

The lower end of the cam 193 is drilled toward a stretch finger 170 to allow engagement with an extension 196 at the rear end of the extension finger 170. .

L-shaped slides (183) using adjustable stop bolts (199) and slotted mountings (198) mounted on the slides, associated with the upper end of the cam and carried by the slides over it. Can be adjusted accurately.

If some of the stop mechanisms in operation are in their normal position, the springs 176 and 178 are extended to a position where the leading end of the extension finger 170 can enter the path of the stock 99. Link with each other so that 170 can move.

According to the feeding motion of the stock, the finger moves to the limit position made by the slot hole 175, which is the point where the finger operates the limit switch 180. At the same time, this movement moves the block 171 clockwise to place it in a secure engagement position between the nose cam portion 194 and the cam surface 195.

At this time, the cam 193 is positioned at the uppermost position together with the L-shaped slide 183.

When energy is supplied to solenoid 190, it operates as described in lever arm 188 to move L-shaped slide 183 and cam 193 down. During the first period of this travel,

The cam noses 194 slide the beveled cam faces 195 down and make the block 171 swing lightly on the shoulder bolt 172 so that it is fixed to the stock. Allow 170 to move slightly.

If this movement continues, the lower end of the cam 193 engages an extension 196 on the extension finger 170 so that the finger pivots and its front end rises to contact the stock.

When the finger is in contact with the stock, the spring 176 moves the finger up as allowed by the slot hole 175 to move it to the position indicated by the dotted line on the stock in FIG. This movement of the finger is affected by the timing associated with the operation of the device and is intended to allow the finger to move at a sufficient distance so that the cut stock portion can be completely pulled out of the device.

After the cut stock portion exits as described in connection with the wiring diagram, the spring 178 returns the finger to its original position on the next stock path.

1 and 20-22 illustrate the hydraulic actuation mechanism used to feed stock along the mandrel 111. Carriage 200 is mounted by rollers 201 on rails 202, which rails 202 are secured at appropriate intervals along channel 115. Is accompanied by.

The carriage is equipped with a yoke portion 205 covering the mandrel 111, and two blocks 206 are fixed to the yoke portion 205 and bolts 207 associated with the slots 208. You can use to adjust the side.

A pusher section 210 having the same diameter and wall thickness as the stock to be cut is mounted on the mandrel 111, and the catch members 212 carry a carriage yoke portion (2). 205). The catch member 212 is mounted to the block 206 and the spring 213 is mounted.

There are also ear portions at the outer end of the catch member to engage the slots on the sides of the pusher piece 210 as shown in FIGS. 20 and 21.

A reversing switch 215 (FIGS. 23 and 24) for the drive motor 220 used in the carriage 200 is mounted in the carriage's path, for example by a portion of the carriage. It is mounted by a reversing switch 215 behind the mounted block 25 to allow it to be bitten.

The length of the pusher surface 210 should be considered in conjunction with the position of the reversing switch 215, which must allow the last condition of the stock to escape between the cutters within the time associated with the operation of the reversing switch 215. Because. The bracket bar 125 must be adjusted along the length of the pusher surface 200 to place the sleeve in such a position that the pusher surface 210 does not pass through the sleeve 133.

The carriage 200 is operated by a reversible fluid motor 220 (FIG. 23) via a sprocket chain 221 fixed at both ends of the carriage as shown in FIG. Strike an idler sprocket 222 mounted adjacent to the rear end of the extension rod 113.

The fluid drive motor 220 is connected to a complete hydraulic system used in the apparatus, as shown in FIG. 23, to which a supply tank 226 of pressure fluid is connected to the motor 227. The pump 225 which is driven by) is mounted.

The supply of pressure fluid to the hydraulic drive motor 220 is controlled by a double-solenoid four-way valve 230, which is returned to the valve as shown. There are no return springs and it is entirely moved by the operation of solenoids 231 and 232.

Pressure lines for fluid motors include check valves 233, reducing valves 234 with drain outlets 235, relief valves 236, and There is a needle valve 237.

The forward movement of the drive motor 220 moving in the carriage 200 and the stock direction is driven by a push button switch 240 that regulates the relay 242. An energizing circuit for the coil flows through the back contacts of a similar relay 243.

The relay 243 also has a similar energy circuit flowing through the back contacts of the relay 242. When the energy is supplied to the relay 242, the operating circuit for the solenoid 231 of the four-valve valve 230 is completed, so that the correct driving motor 220 and the carriage 200 may cause forward movement. The valve is moved to a position capable of supplying a pressure fluid to the drive motor 220 in the direction.

The circuit flowing through the rear contacts of the relay 243 is cut off to prevent the energy supplied to the relay 243 while the relay 242 is energized.

An energy circuit for the relay 243 is configured and at the same time, the circuit flowing through the rear contact of the relay 242 is blocked, and the operation circuit for the solenoid 232 in the four-way valve 230 is configured to the driving motor 220. Manually operating the pushbutton switch 245 for changing the valve position in the direction of reversing the flow of the flowing pressure fluid reversely causes the reverse movement of the driving motor 220 to enter the carriage 200.

In this arrangement, each pushbutton is actuated briefly only during the intervals required to energize the valve solenoid and actuate the valve. The valve remains in the moved position until the other solenoid is activated.

Reversal switch 215 inverts relay 243 through automatic alternative operating arrangsment. The reversing switch 215 is normally open and, as already described, is connected side by side with the switch 245 so that the pusher surface 210 can be operated by a portion of the carriage 200 once all of the last part of the stock has been released.

During normal operation, the power is regulated by the main starting switch (although not shown in the figure) and the cutting cycle can be controlled using either the manual pushbutton limit switch 250 or the limit switch 180 in the stop mechanism. (cutting cycle) can be operated alternately.

Therefore, when operating the device on a given stock length, care should be taken to remove scratches or deformations at the end of the stock near the extension finger 170 in advance.

If the remaining portion of the stock does not match the total number of unit lengths according to the setting of the stop finger, then as mentioned above, the pusher 210 will cause the last piece of the device to be removed immediately before the reversing switch 215. piece).

After this initial trim operation, the feeding motion of the stock in contact with the extension finger 170 begins, which is reversed only to the limit position permitted by the slot hole 175, in which the finger locks the limit switch 180 and moves the stock. By stopping the fluid driving motor 220 is stopped.

Limit switches 180 and 250 alternately operate a control relay 252 and an energy circuit, where the energy circuit can be engaged by a normally locked limit switch 55 and the carriage 200. Flows through a normally locked safety switch (253).

The safety switch 253 is mounted in a suitable position with respect to the length of the pusher surface 210, which prevents the cutter from operating during the subsequent forward movement of the carriage, which is required for the pusher surface 210 to completely discharge the last piece of stock. To cut the last piece of stock so that the carriage can run. And this arrangement is schematically illustrated using the bracket 254 in FIG.

The limit switch 250 is connected side by side with the limit switch 180, and may operate the cutting member once in the same manner as the manual operation when the first end of the stock of a certain length.

Supplying energy to the regulating relay 252 completes the operation circuit for the solenoid valve 255 for regulating the flow of the pressure fluid flowing toward the cylinder 30 and shows the same as in the spring return type.

In addition, energizing the relay completes a holding circuit for the relay passing through different pairs of contact points and limit switches 18 and safety switches 253. When the actuating circuit of the solenoid valve 255 is locked, the valve moves in a direction in which pressure fluid can flow to the lower end of the cylinder 30 so that the working stroke of the piston screw 33 moves the carrier member 66. To move up. As already explained, this stroke is limited to a predetermined distance through the setting of a screw collar 40.

This limit is the distance through which only the part to be cut along the top and bottom of the stock can be cut while the vertically lying stock part of the cutting stock remains fully connected.

The result of this stroke can be seen in the detailed positions of FIGS. 10 and 11 where the flow die 102 and punch 103 are moved. In Figure 11 the cuts of the stock are indicated by 256 and 257.

When the stroke of the piston is completed in the cylinder 30, the flange 42 mounted on the screw collar 40 operates as described above to close the limit switch 45, which is normally open, and to maintain the flow of pressure fluid flowing to the cylinder 35. Complete the energy circuit for the relay 260 to adjust.

Accordingly, the valve 261 moves to a position to provide a pressure fluid to the outer end of the cylinder 35, and the resulting working stroke of the cylinder moves the carrier member 65 to finish the stock cutting.

When the stroke of the piston mounted on the cylinder 35 is completed, the holding circuit for the adjustment relay 252 is opened by operating the limit switch 55 in which the flange 51 mounted on the screw collar 50 is normally locked. . Therefore, the solenoid valve 255 moves to reverse the supply of pressure fluid flowing to the cylinder 30 and the piston returns to its original position.

As soon as the piston screw 33 begins to be withdrawn, the screw collar 40 moves away from the limit switch 45, so the energy circuit for the relay 260 is opened, and the valve 261 is moved to move the pressure fluid flowing into the cylinder 35. Inverts the flow, causing the piston to return to its original position.

By returning the two pistons in place, the mechanical cycle ends, where the pair of movable cutters, fluid foil 102 and punch 103 return to the center of the other cutter and stock.

FIG. 24 shows the actuation circuit connected to another pair of contact points in relay 260 and used for solenoid 190. In this arrangement, energizing solenoid 190 when energy is supplied to relay 260. FIG. The extension finger 170 is separated from the stock piece to be cut as described above.

Therefore, the finger moves forward again through the stock end as indicated by the dashed line in FIG. 14, at which time the limit switch 180 is opened and the adjustment relay 252 remains locked due to the holding circuit.

However, while this movement of the finger terminates the stopping action on the stock, the latter cannot proceed until the cutting cycle is completed through the engagement of the cutter cutting faces that can move with the cutting portion 257 of the stock.

As already explained, after the cutter returns to the center position at the end of the cycle, this resistance to the feeding motion of the motor 220 and the stock is lost and the stock is advanced.

During the first movement of the stock, the cutting piece exits the cutter and is released, thus allowing the extension finger 170 to return to its original stop position by the spring 178. The next cutting cycle is then started by the resultant movement of the finger next to the limit switch 180 and the engagement of the finger with the stock. After the first cutting operation is started by the pushbutton limit switch 250 or the limit switch 180, the apparatus will be automatically operated.

During every cutting operation, the feed motor 220 is stopped until the cutter comes to the center of the position where the stock can be continuously fed, and subsequent pieces are placed at the back of the extension finger 170 and the cutter. It is cut to a predetermined length by the space between the cutting planes.

After the last stock cutting, the carriage 200 continuously supplies the stock so that the safety switch 253 opens to block the supply of energy to the adjustment relay 252. This is to prevent the operation of the cutter.

However, in order to discharge the last cut stock piece, the carriage must continuously supply the stock until the reverse reversing switch 215 is engaged and locked.

In this case, the direction of operation of the supply motor is reversed, causing the carriage to return to the rear end of the mandrel 111. This movement is terminated when the carriage is engaged with the bracket 114, and the drive motor 220 has a new stock piece in the device. The load is stopped until it is reversed by the limit switch 250.

When using the invention in the device described herein, it is to be understood that the invention is not limited to a specific form of the device but may be modified and used within the scope defined in the appended claims.

The present invention can minimize the loss of material and can quickly and accurately cut the tubular stock in the state of no distortion and scratches of the tube, and the compact and simple structure can reduce the cost of operation and maintenance,

In addition, several operating parts can be operated in conjunction with each other so that continuous operation is possible, and the effective length of the strokes of the hydraulic cylinder for operating the cutting mechanism can be adjusted according to the thickness of the stock to be cut. In addition, it is effective to cut various sizes of stock without distortion.

Claims (6)

A device for cutting tube stock consisting of two pairs of internal and external cutters, including a continuous annular die arranged to surround the punch of the stock and an internal punch used for insertion into the stock, is characterized by Support the pairs, operate the cutters in the desired order for a pair of cutting strokes carried out at right angles to each other, Set the stop point in the stock path so that the machine stock is continuously supplied and supplied only to a predetermined distance.The machine stops at the machine stop point and the machine cutter starts to operate.The machine cutter operates to complete the cutting stroke. Tube cutting device characterized in that it stops temporarily when it stops, and then performs automatic continuous subsequent operation. The method of claim 1, The characteristics of a cutting tube stock device consisting of two pairs of internal and external cutters including a continuous annular die arranged to enclose the stock and the punch and an internal punch used to insert into the stock are characterized by the fact that A tube cutting device characterized in that it stops when finished, temporarily stops operation, releases the cut section of the machine stock, and then refeeds the machine stock to allow the machine to perform automatic continuous follow-up. The method of claim 1, Apparatus and characteristics for a cutting tube stock consisting of two pairs of internal and external cutters including a continuous annular die arranged to enclose the stock and the punch and an internal punch used for insertion into the stock. A pair of cutting strokes that support the pairs and run at right angles to each other, a mandrel that supports the feeding motion of the Gistock to the cutter, and a trailing end of the stock, including a slide on the mandrel. Operate the cutter in the order you want for the carriage, etc. installed nearby, Equipped with a hydraulic motor that is used to continuously move the machine carriage in the direction of moving the stock on the machine mandrel, the machine stock is engaged at the machine stop and the machine cutter starts to operate. When the cutter is activated and the cutting stroke is completed, it stops and temporarily stops operation, releases the cut section of the machine stock, and then resupply the machine stock so that the machine automatically runs continuously. Tube cutting device characterized in that a switch is used in the path of the machine carriage which is used to reverse the machine motor direction once all the stock has been cut so that the machine carriage can be returned from the machine cutter to the opposite end of the machine mandrel. The method of claim 1, A device for cutting tube stock consisting of two pairs of internal and external cutters, including a continuous annular die arranged to enclose the stock and a punch and an internal punch used to insert into the stock, is characterized by Supports a pair of cutters, a double acting hydraulic cylinder with pistons and fixed to the machine frame, The machine piston is connected to a pair of machine cutters so that a pair of cutting strokes are perpendicular to each other on the machine cylinder, a pair of machine cutters supply pressure fluid to the machine cylinder in a direction to perform the cutting stroke, and the machine stock is on the opposite side. Only at a predetermined limit to the extent that the remaining parts of the machine stock, which are cut only in the longitudinal direction of the machine stock, can be left in a fully connected position, the moving part of the machine is operated to supply pressure fluid to other cylinders. After the second stroke of the cutter finishes the cutting of the machine stock, after the second stroke, the moving part of the machine is operated to reverse the pressure fluid supply to the first cylinder and return the piston to its original position. A tube cutting device, characterized in that to reverse the supply of pressure fluid flowing to the second gas cylinder through the withdrawal of the gas piston and to return the piston in the cylinder. The method of claim 1, The characteristics of a cutting tube stock device consisting of two pairs of inner and outer cutters including a continuous annular die arranged to enclose the stock and the punch and an inner punch used to insert into the stock are characterized by the close proximity of the stock in the axial direction. It supports the existing machine cutter pairs, and the hydraulic pressure is carried by the machine frame and is connected to the machine cutter pairs so that the cutting movement of the machine cutter is performed in a predetermined transverse direction with respect to the axis of the machine stock. Applying hydraulic pressure to the machine pressure is to execute the work stroke, and by placing the machine cutters at the predetermined limit distance, only a part of the entire periphery of the machine stock is cut off, and the remaining opposite part is laid in the longitudinal direction of the machine movement. When additional hydraulic pressure is applied, the cutter pair is operated and the cutting movement proceeds in the horizontal direction of the first cutting movement. Pre-determined order of work administration by continuously supplying the stocks in the axial direction through the machine cutters to set the stop point in the stock path so that the feed motion is only up to a predetermined distance, and supplying the pressure fluid by engaging the stock with the preset point. To proceed as The tube cutting device is characterized in that the cutter stops when the cutting stroke is completed and temporarily stops the operation, and then performs the automatic continuous follow-up operation. The method of claim 1, A device for cutting tube stock consisting of two pairs of internal and external cutters including a continuous annular die arranged to enclose a stock and a punch and an internal punch used to insert into the stock is characterized by a close proximity in the axial direction of the stock. Supports the cutter pairs The first hydraulic cylinder is carried by the machine frame and is connected to the machine cutter pairs so that the machine cutter's cutting motion is performed in a predetermined transverse direction with respect to the machine stock axis. The application of hydraulic fluid to the machine cylinder is the implementation of the working stroke. By placing the machine cutters at a predetermined limit distance, only a part of the periphery of the machine stock is cut off and the remaining opposite part is in the longitudinal direction of the machine movement. You will lie down, When the second hydraulic cylinder is operated in conjunction with the pre-cutter pair, the cutting movement proceeds in the horizontal direction of the first cutting movement. When the hydraulic pressure is applied to the second cylinder, the cutting operation of the pre-stock is completed. Equipped with a hydraulic motor that continuously supplies the machine stock in the axial direction through the machine cutters, and sets the stop point in the stock path so that the machine continuously supplies the hydraulic fluid to the machine motor to supply only a predetermined distance. Engage the machine stock with the machine stop point to supply hydraulic fluid to both machine cylinders so that the working stroke proceeds in a predetermined order, and the machine cutter stops when the cutting stroke is completed and stops temporarily. Tube cutting device, characterized in that for subsequent operation.