JP2009050882A - Drawing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drawing device in which a scrap cut with a cutting roller is surely moved to a prescribed scrap tray. <P>SOLUTION: The drawing device is provide with a drawing roller mount on which a drawing roller and a cutting roller are slidably supported in the radial direction at the tip of a spindle and also is provided with a cam plate for moving the drawing roller and the cutting roller in the radial direction at the tip of a cam shaft which is fit and inserted inside the spindle concentrically to the spindle. The spindle and the cam shaft are composed of a hollow shaft, and in the drawing device provided with a hollow shaft 41 for moving the mandrel 40 forward and backward in the cam shaft, the tip of the mandrel is made into a scrap receiving part 40a having a small diameter D1 which is smaller than the outside diameter D of the mandrel and a sliding member 42 composed of a claw-folder 42a and a guide shaft 42b for moving the claw folder forward and backward is provided in the inside of the mandrel and also a claw folder member 20 which is projected from slits 40a' formed on the peripheral surface of the scrap receiving part is arranged on the claw folder and the scrap caught with the scrap receiving part is pushed out with the claw member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drawing apparatus, and more particularly to an improvement of a drawing apparatus provided with a mechanism for cutting a surplus portion of a pipe end subjected to drawing.

  Conventionally, as a drawing device for drawing a cylindrical member such as a pipe tip, a squeezing roller is supported on a roller mounting base attached to a rotating spindle tip so as to be slidable in a radial direction, and is fixed by the squeezing roller. There has been proposed a drawing apparatus that performs drawing on the tip of a processing pipe (for example, see Patent Document 1).

An example of a conventional drawing apparatus is shown in FIGS.
The drawing device 60 includes a main shaft mechanism 2 and a support mechanism (not shown) that supports the pipe P to be processed so as to face the main shaft mechanism 2, and the main shaft housing 11 of the main shaft mechanism 2 includes a base. 4 is mounted on a guide rail 5 formed on 4 so as to be movable in the front-rear direction L by a drive motor 6 and a drive screw 7.

  The spindle mechanism 2 is driven by a driving pulley H connected to an appropriate drive motor (not shown), and is supported by a spindle housing 11 via a bearing 12 and a roller provided at the tip of the spindle 10. And a mounting base 13.

The roller mount 13 is attached to the tip of the main shaft 10 via a flange 16 and includes a main mount 14 having a guide groove 14a for guiding a support member 17 provided with the squeezing roller R in the radial direction, and a squeezing roller. It is mainly composed of a cam plate 18 provided with spiral grooves 18a for moving R in the radial direction.
The support member 17 is provided with a guide pin 17a that enters the spiral groove 18a, thereby moving the squeeze roller R in the radial direction.

  The main shaft 10 has a hollow structure, and a cam shaft 19 having a cam plate 18 attached to the tip is accommodated in the main shaft 10. The main shaft 10 and the cam shaft 19 are engaged via a speed change mechanism 30. The squeezing roller R at the position shown in FIG. 8 moves in the radial direction to the position shown in FIG. 9 when the cam plate 18 rotates 90 degrees counterclockwise in the figure relative to the main mount 14. The tip of the pipe P to be processed is processed.

The mandrel 40 inserted into the workpiece pipe P is disposed at the tip of the shaft 41 accommodated in the cam shaft 19 and plays a role of regulating the inner diameter (outer diameter) when the workpiece pipe P is processed. Yes.
The shaft 41 uses a hollow tube that can contain a guide rod 47 for receiving the waste material P ′ of the pipe P to be machined that is cut after machining, and the guide rod 47 is moved by the advance / retreat cylinder 43. Are arranged to be able to advance and retreat.
Further, the movement of the shaft 41 in the axial direction is performed by placing the cylinder guide 44 disposed in the vicinity of the advance / retreat cylinder 43 for moving the guide rod 47 back and forth on the moving bed 45c of the axial movement means 45. ing.

  The axial movement means 45 uses, for example, a linear guide as shown in FIG. 7, transmits the rotation of the rotation mechanism 46 such as a servo motor to the rotation shaft 45a, and guides the guide rail 45b in the axial direction of the main shaft 10. By moving, the moving bed 45c on the guide rail 45b is moved (see, for example, Patent Document 2).

  As the speed change mechanism 30, a flexibly meshing drive transmission device is used. As shown in FIG. 11, the outline of the transmission mechanism 30 is a pair of outer rings 31, 32 engaged with the main shaft 10 and the cam shaft 19, respectively. A flexible tooth wheel 33 that meshes with a tooth groove formed on the inner surface of the outer ring (both have the same number of teeth) and has a tooth shape with a different number of teeth, and the tooth wheel 33 has an elliptical shape and is rotated. The wave forming ring 34 is configured to be supported so that the tooth gap is engaged at two opposite positions.

  In this speed change mechanism 30, when the wave forming wheel 34 is fixed and one outer ring 31 is driven, the toothed wheel 33 follows and rotates. Accordingly, the other outer ring 32 is also rotated via the tooth wheel 33. At this time, the number of teeth of both the outer rings 31 and 32 is the same, and therefore, the outer rings 31 and 32 are rotated at the same rotation number. On the other hand, the number of teeth of the tooth wheel 33 is usually smaller than that of the outer rings 31 and 32 (for example, two fewer).

Next, the outer ring 31 is fixed, and the wave forming ring 34 is rotated. Reference numeral 35 denotes a drive reduction motor. At this time, the tooth wheel 33 has a difference in the number of teeth from the outer ring 31, and is rotated by this, and the other outer ring 32 is rotated by this.
Therefore, by rotating the wave forming ring 34 while rotating the outer ring 31, the relative rotational speed of the other outer ring 32 relative to the outer ring 31 varies. The variable rotational speed is proportional to the rotational speed of the wave forming wheel 34. In this way, the differential is performed by the flexibly meshing drive transmission device.

In FIG. 11, 36 is a support gear for the outer ring 31, 37 is a support gear for the outer ring 32, 38 is a drive gear that is attached to the main shaft 10 and meshes with the support gear 36, and 39 is a driven gear that meshes with the support gear 37.
Thereby, the relative speed difference (differential) of the outer ring 32 with respect to the outer ring 31 can rotate the cam plate 18 via the cam shaft 19 to allow the squeeze roller R to enter and exit in the radial direction, and is fixed to the support mechanism 3. The drawn pipe tip can be drawn.

And in order to cut the unnecessary part of the pipe tip after processing, in addition to the squeezing roller R, the roller mounting base 13 is provided with a support member 17 provided with a cutting roller C.
As shown in FIG. 12, the support member 17 includes an upper transition member 56 that rotatably attaches the cutting roller C and a lower transition member 51 that includes a guide pin 51 a that projects into the spiral groove 18 a of the cam plate 18. The upper transition member 56 and the lower transition member 51 are slidably disposed in the guide groove 14a of the main mounting base 14, and each can transition in a direction perpendicular to the axis of the main shaft 10. ing.

The support member 17 on which the cutting roller C is disposed is configured so that the transition direction of the lower transition member 51 and the transition direction of the upper transition member 56 are reversed by the retrograde mechanism 50.
The retrograde mechanism 50 includes a rack 51 b carved in the lower transition member 51, a gear 52 rotatably disposed in the main mount 14 that meshes with the rack 51 b, and an intermediate gear 53 that meshes with the gear 52. And a drive gear 54 attached to the same shaft 55 as the intermediate gear 53, and a rack 56 a carved on one side surface of the upper transition member 56 meshing with the drive gear 54.

  As a result, the cutting roller C moves in the direction opposite to the moving direction of the guide pin 51a that has entered the spiral groove 18a of the cam plate 18 (see, for example, Patent Document 3).

  Thus, as shown in FIG. 13, when the tip of the pipe P to be processed is drawn by the drawing roller R, and the unnecessary portion at the end is cut by the cutting roller C, the advancing / retreating cylinder 43 is operated to operate the mandrel 40. The ring-shaped waste material P ′ cut in a state where the guide rod 47 protrudes from the front end of the steel sheet is received and stored in a predetermined waste material tray B.

By the way, the guide rod 47 has a structure that moves forward and backward in the mandrel 40, and its outer diameter is as thin as half or less of the outer diameter of the mandrel 40. As shown in FIG. 14A by the force, the rotation continues in a state where it is hooked on the guide rod 47.
Therefore, the waste material P ′ is rotated as shown in FIGS. 14B to 14C when the guide rod 47 is moved to move to the predetermined position of the waste material tray B. However, there is a problem that the guide rod 47 may fall off.
Japanese Patent No. 3514730 JP 2002-18635 A JP 2001-137862 A

  An object of the present invention is to provide a drawing device that can reliably move waste material cut by a cutting roller to a predetermined waste material tray in view of the problems of the conventional drawing device.

  In order to achieve the above object, a drawing apparatus of the present invention includes a roller mounting base that supports a drawing roller and a cutting roller slidably in a radial direction at the tip of a spindle, and is concentric with the spindle and within the spindle. A cam plate for moving the squeezing roller and the cutting roller in the radial direction is provided at the end of the inserted cam shaft, the main shaft and the cam shaft are constituted by a hollow shaft, and a hollow shaft for moving the mandrel forward and backward is provided in the cam shaft. In the drawing apparatus, the tip of the mandrel is a waste receiving part having a diameter smaller than the outer diameter of the mandrel, and the mandrel is provided with a slide member including a claw folder and a guide shaft for moving the claw folder forward and backward, The claw folder is provided with a claw member projecting from a slit formed on the peripheral surface of the waste material receiving part, and the waste material hung on the waste material receiving part is pushed out by the claw member. It is characterized in.

  In this case, the outer diameter of the waste material receiving portion can be 90 to 95% of the outer diameter of the mandrel.

  Furthermore, in these cases, the guide shaft has a hollow structure, and a piston shaft for advancing and retracting the claw member can be inserted into the guide shaft.

  According to the drawing apparatus of the present invention, the tip of the mandrel is used as a waste receiving part having a diameter smaller than the outer diameter of the mandrel, and the mandrel has a sliding member including a claw folder and a guide shaft for moving the claw folder back and forth. The claw folder is provided with a claw member protruding from a slit formed on the peripheral surface of the waste material receiving portion, and the waste material hung on the waste material receiving portion is pushed out by the claw member. Since the waste material after cutting is caught with the tip of the waste material receiving part, the caught waste material is held in the waste material receiving part without rotating greatly, and after being moved to the predetermined waste material receiving tray, it is caught in the waste material receiving part It is possible to provide a drawing apparatus capable of extruding waste material with a claw member and reliably moving the waste material to a waste material tray.

  Further, when the outer diameter of the waste material receiving part is 90 to 95% of the outer diameter of the mandrel, the difference between the inner diameter of the waste material and the outer diameter of the waste material receiving part is reduced, so that the rotation due to the inertial force of the waste material after cutting. Can be suppressed to a minimum, and falling off of waste materials during movement can be surely prevented.

  Furthermore, when the guide shaft has a hollow structure and the piston shaft for advancing and retracting the claw member is inserted into the guide shaft, the claw member is mechanically moved back and forth by the operation of the piston shaft. Can be put in and out.

  Embodiments of a drawing apparatus according to the present invention will be described below with reference to the drawings. In addition, about the structure similar to a conventional apparatus, the same code | symbol and a series of code | symbol are attached | subjected, and description is abbreviate | omitted.

  1 to 4 show a first embodiment of the drawing apparatus of the present invention.

  As in the conventional example, the drawing apparatus 1 includes a roller mounting base 13 that supports the drawing roller R and the cutting roller C slidably in the radial direction at the tip of the main shaft 10, and the main shaft is concentric with the main shaft 10. 10 is provided with a cam plate 18 for moving the squeezing roller in the radial direction at the tip of the cam shaft 19 inserted into the main shaft 10, and the main shaft 10 and the cam shaft 19 are constituted by hollow shafts. After the drawing process is performed on the tip of the pipe, the excess part at the tip of the pipe P to be processed which has been reduced in diameter by the cutting roller C is cut.

As shown in FIG. 2, the tip of the mandrel 40 is a waste material receiving portion 40a having a smaller diameter (D1) than the outer diameter D of the mandrel 40, and the mandrel 40 is moved forward and backward. A slide member 42 composed of a guide shaft 42b is provided, and the claw folder 42a is provided with a claw member 20 projecting from a slit 40a 'formed on the peripheral surface of the waste material receiving portion 40a. The waste material P ′ hung on the portion 40 a is pushed out by the claw member 20.
The claw folder 42a and the guide shaft 42b may have an integral structure.

The outer diameter D1 of the waste material receiving portion 40a is about 50 mm when the outer diameter D of the mandrel 40 is 54 mm, for example, and is in the range of 90 to 95% with respect to the outer diameter D of the mandrel 40. It is preferable to make the diameter large as long as the cutting roller C does not reach the surface.
Further, the axial length M of the waste material receiving portion 40a is determined when the mandrel 40 enters the tip of the pipe P for processing, for example, when the pipe P for processing is a vehicle muffler. It is preferable to make the length as long as possible without contacting the ceramic as the catalyst.

  Then, by making the outer diameter D1 of the waste material receiving portion 40a slightly smaller than the outer diameter D of the mandrel 40, the difference between the inner diameter of the waste material P ′ and the outer diameter of the waste material receiving portion 40a is reduced and cut. The waste material P ′ does not rotate as much as when caught by the guide rod 47 of the conventional example, and does not fall off during movement.

  The guide shaft 42 b is included in a shaft 41 that pushes and pulls the mandrel 40, and the claw folder 42 a in which the claw member 20 that pushes out the waste material P ′ applied to the waste material receiving portion 40 a by the advance / retreat cylinder 43 is advanced and retracted. I have to.

  The configuration of the claw member 20 is not particularly specified. During the drawing process, as shown in FIG. 2, the excessive part at the tip of the pipe P to be processed that is in the mandrel 40 and has been reduced in diameter is cut. Any configuration may be employed so long as the protruding portion 20a advances and retreats (enters and exits) from a slit 40a ′ formed on the peripheral surface of the waste material receiving portion 40a so as to push the waste material P ′ from the waste material receiving portion 40a in the distal direction. In this embodiment, as shown in FIG. 2, it is configured in an L shape when viewed from the front, and the fulcrum 20b is swingably attached to a groove portion 42a 'formed in the claw folder 42a, and at the notch portion 20c serving as an action point. A pin disposed in the notch portion 22 ′ of the advance / retreat member 22 is hooked so that the protrusion 20a advances and retreats from the peripheral surface of the waste material receiving portion 40a as the advance / retreat member 22 moves in the direction parallel to the axis of the main shaft 10. In That.

The advancing / retracting member 22 is attached to the tip of the piston shaft 21 that is disposed in the hollow guide shaft 42b so as to be able to advance and retract.
The piston shaft 21 is connected to a piston 24 of a child cylinder 23 that uses the piston of the advancing / retreating cylinder 43 of the mandrel 40 as a cylinder, and is moved by the child cylinder 23 in a direction parallel to the axis of the main shaft 10.

  The number of the claw members 20 is not particularly limited, as long as the waste material P ′ cut and applied to the waste material receiving portion 40a can be pushed out on the waste material receiving tray B. For example, the claw members 20 are disposed at four locations on the circumference. In addition, it may be arranged only at one upper portion of the nail folder 42a.

  In the above configuration, after the drawing process is finished, a procedure for cutting the surplus portion at the tip of the pipe P to be processed and moving the waste material P ′ to the waste material tray B will be described.

  First, after the tip of the pipe P to be processed is contracted by the squeezing roller R (see FIG. 4A), the mandrel 40 is slightly moved from the tip of the pipe P to be processed by the axial movement means 45 (see FIG. 7). As shown in FIG. 4B, the waste material receiving portion 40a of the mandrel 40 is kept waiting inside the tip of the work pipe P.

Then, immediately before or immediately after cutting the tip of the pipe P to be processed by the cutting roller C, the protruding portion 20a of the claw member 20 is protruded from the waste material receiving portion 40a, and the tip of the pipe P to be processed is cut by the cutting roller C. Is cut off so that the waste material P ′ is hooked on the waste material receiving portion 40a.
In this case, the outer diameter of the waste material receiving portion 40a is only slightly smaller than the outer diameter of the mandrel 40, and is substantially the same as the inner diameter of the cut waste material P '. Therefore, the waste material P' is transferred to the waste material receiving portion 40a. After being caught, it does not rotate significantly as in the conventional example, and does not fall off from the waste material receiving portion 40a.

  From this state, when the mandrel 40 is moved to the left side of the figure and reaches the upper part of the waste material receiving tray B, the guide shaft 42b is moved to the right side of the figure, and the waste material P ′ is received by the protruding portion 20a of the claw member 20. Extruding from the portion 40a in the distal direction, the waste material P ′ is dropped and stored in the waste material tray B by its own weight (see FIG. 4C).

  FIG. 5 shows a second embodiment of the drawing apparatus of the present invention.

  The drawing device 1 is configured so that the elastic member 25 moves the claw member 20 protruding from the waste material receiving portion 40a.

The elastic member 25 is not particularly limited, but in the present embodiment, a spring member such as a spring or a spring is used.
The claw member 20 has a fulcrum 20b as a fulcrum and is swingably attached to a groove 42a 'formed in the claw folder 42a. A pin 20d is disposed at a portion serving as an action point and is connected to one end of the elastic member 25. Like to do.
The inner side surface 20a ′ of the protrusion 20a of the claw member 20 is preferably formed in a gentle arc shape so that the protrusion 20a can be smoothly stored in the mandrel 40 from the state where the protrusion 20a protrudes from the slit 40a ′.
The elastic member 25 fixes the other end not connected to the pin 20d to a groove 42a 'formed in the claw folder 42a, and constantly biases the claw member 20 in a direction in which the protruding portion 20a protrudes outward from the waste material receiving portion 40a. Like to give.
When the claw folder 42a is in the mandrel 40, the protruding portion 20a of the claw member 20 stands by while being pressed against the peripheral surface of the hole of the mandrel 40.

  In the above configuration, after the tip of the pipe P to be processed is contracted by the squeezing roller R, the mandrel 40 is moved away from the tip of the pipe P to be processed by moving the mandrel 40 to the left side in the figure by the axial movement means 45 and cut. The claw folder 42a of the slide member 42 is slightly moved to the right in the figure by the advancing / retreating cylinder 43 immediately before or immediately after cutting the tip of the pipe P to be processed by the roller C, and the claw member 20 is urged by the urging force of the elastic member 25. The protrusion 20a protrudes from the peripheral surface of the waste material receiving part 40a (see FIG. 5B).

  Then, the tip of the pipe P to be processed is cut by the cutting roller C, and the waste material P ′ is cut off so as to be hooked on the waste material receiving portion 40a.

  From this state, when the mandrel 40 is moved to the left side of the figure and reaches the upper part of the waste material receiving tray B, the guide shaft 42b is moved to the right side of the figure, and the waste material P ′ is received by the protruding portion 20a of the claw member 20. Extruding from the portion 40a in the distal direction, the waste material P ′ is dropped and stored in the waste material tray B by its own weight (see FIG. 5C).

  The other configuration and operation of the present embodiment are the same as those of the first embodiment.

  The drawing device of the present invention has been described based on a plurality of embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and the configurations are appropriately set within the scope of the invention. It can be changed.

  The drawing apparatus of the present invention has a characteristic that the waste material after cutting can be surely moved to a predetermined waste material tray, so that it is necessary to cut the surplus portion at the end of the material after the drawing process. It can be suitably used for the application of a drawing apparatus for processing a certain product.

1 is an overall view showing a drawing apparatus of the present invention. It is sectional drawing of a part notch which shows the detail of the mandrel used for the drawing apparatus of this invention. It is a partial cross section figure which shows the moving means of the guide shaft and piston shaft used for the drawing apparatus of this invention. In the drawing apparatus of the present invention, a procedure for moving waste material to a waste material tray is shown. (A) shows an initial state, (b) shows a state where the waste material is cut, and (c) shows that the waste material is removed from the waste material receiving part. Indicates the state. In the second embodiment, a procedure for moving the waste material to the waste material tray is shown, (a) shows an initial state, (b) shows a state where the waste material is cut, and (c) shows a state where the waste material is removed from the waste material receiving portion. Indicates. It is a general view which shows the conventional drawing apparatus. Conventional mandrel and guide bar of drawing device It is a top view which shows the initial state of the tool mounting base for drawing. It is a top view which shows the movement state of the squeezing roller of the tool mounting base for squeezing. It is a top view which shows the movement state of the cutting roller of the tool mounting base for drawing. It is explanatory drawing of a transmission mechanism, (a) is a front view of a transmission mechanism, XX sectional drawing in (b), (b) is YY sectional drawing in (a), (c) is description of a transmission action. FIG. The structure of a retrograde mechanism is shown, (a) shows the WW cross section of FIG. 8, (b) shows the VV cross section of FIG. In the conventional drawing apparatus, the procedure for moving the waste material to the waste material tray B is shown. In a conventional drawing apparatus, it is explanatory drawing which shows the state from which waste material falls out from a guide rod.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drawing apparatus 2 Main shaft mechanism 10 Main shaft 13 Roller mounting base 18 Cam plate 19 Cam shaft 20 Claw member 20a Protruding portion 21 Piston shaft 40 Mandrel 40a Waste material receiving portion 41 Shaft 42 Slide member 42a Claw folder 42b Guide shaft P 'Waste material

Claims (3)

  A roller mounting base for supporting the squeezing roller and the cutting roller slidably in the radial direction is provided at the tip of the main shaft, and the squeezing roller and the cutting roller are provided at the tip of the cam shaft that is concentrically fitted with the main shaft and inserted into the main shaft. In a drawing apparatus having a cam plate that is moved in the radial direction, the main shaft and the cam shaft are constituted by hollow shafts, and a hollow shaft that moves the mandrel back and forth in the cam shaft, the outer diameter of the mandrel The mandrel is provided with a slide member including a claw folder and a guide shaft for advancing and retreating the claw folder, and the claw folder is formed on the peripheral surface of the waste material receiving unit. A drawing apparatus characterized in that a claw member protruding from the slit is disposed and the waste material applied to the waste material receiving portion is pushed out by the claw member.   2. The drawing apparatus according to claim 1, wherein an outer diameter of the waste material receiving portion is 90 to 95% of an outer diameter of the mandrel.   3. The drawing apparatus according to claim 1, wherein the guide shaft has a hollow structure, and a piston shaft for advancing and retracting the claw member is inserted into the guide shaft.

Images