JPH04122417U - Tapping device for punch press - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately tap a workpiece at a predetermined position. [Structure] When lowering the tap tool together with the tap tool support while rotating it relative to the workpiece for tapping processing, the lower edge of the plate holder, which is arranged to surround the tap tool, first comes into contact with the workpiece. As the plate continues to descend further, the spring member brings the plate holder into elastic contact with the workpiece, and the workpiece is firmly held down. Therefore, by further lowering the tapping tool while rotating in this state, tapping can be performed while firmly holding the workpiece.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on the mold mounting hole of a punch press such as a turret punch press. This invention relates to a tapping device for a punch press that is attached to and used in a punch press.

0002

[Conventional technology]

Conventionally, the punch mold of a punch press processing machine such as a turret punch press is attached. The tapping device for the punch press, which is used by attaching it to the mold mounting hole, is Attach the tap tool to the tap tool support and around the tap tool support. It is equipped with a cylindrical guide to guide the lifting and lowering movement of the pull tool. It is installed in the mold installation hole. And when performing tapping processing, The tool support and the tap tool at its lower end are lowered while rotating within the guide, Tapping was performed at a predetermined position on the work using a tap tool.

0003

[Problem that the idea aims to solve]

However, with such conventional tapping devices for punch presses, it is difficult to touch the workpiece. When lowering the tap tool support and tap tool along the guide, There is no plate to hold down the workpiece before the tapping tool makes contact, and the lower end of the tapping tool Since tapping was started by directly contacting the workpiece, the following problems occurred. There was a problem.

0004 In other words, the workpieces processed by punch presses are thin plates, and they cannot be moved easily. Fluttering occurs during positioning, and burring is performed before tapping. This often causes the workpiece to be warped, so it is difficult to touch it. If you do not hold down the workpiece during tapping, you will not be able to perform accurate tapping. There were no problems.

[0005] This idea was devised in view of these conventional problems, and the tapping process Accurate tapping is achieved by tapping while holding the workpiece at times. The purpose is to provide a tapping device for a punch press that allows processing. do.

[0006]

[Means to solve the problem]

This idea is based on a tapper for a punch press that is attached to the tool mounting hole of a punch press. In a tapping device, the outside of a tap tool support with a tap tool attached to its lower end. A cylindrical guide is provided on the side to guide the lifting and lowering movement of the tap tool. Take the area around the tap tool that is exposed downward from the lower end of the guide in the raised position. A cylindrical plate holder is placed so as to surround it, and a spring is attached between the plate holder and the lower part of the guide. They are connected via a member so that the plate holder can be retracted to the guide side.

[0007]

[Effect]

This tapping device for punch press uses a tapping device for tapping processing. When lowering the tap tool together with the tap tool support while rotating it relative to the workpiece. In this case, the lower edge of the plate holder, which is placed around the tap tool, is When the plate holder contacts the workpiece and continues to descend, the spring member causes the plate holder to come into elastic contact with the workpiece. This will allow you to firmly hold the workpiece. So, in this state Furthermore, by lowering the tapping tool while rotating, the workpiece can be firmly pressed. Tapping processing can be performed while moving.

[0008]

【Example】

Hereinafter, embodiments of this invention will be explained in detail based on the drawings.

[0009] First, Figure 3 shows the relationship between the punch press and the tapping device or punch. explain.

0010 The turret punch press 1 includes a frame 5 with a bosom portion 3. this The turret punch 1 includes a fixed table 7 that supports a plate-shaped workpiece W, and a fixed table 7 that supports a plate-shaped workpiece W. There is a workpiece positioning device 9 for positioning, and an appropriate number of tapping devices 11. or a disk-shaped upper turret 13 equipped with a punch (not shown); At the bottom position corresponding to the device 11 and the punch, a suitable number of holes 15 or dies (as shown) are installed. A turret device 19 equipped with a disk-shaped lower turret 17 with a has been done.

[0011] Additionally, the tapping device 11 of the upper turret 13 is applied to the upper frame 21. A striker 23 and a ram body 25 are mounted so as to be movable up and down. Additionally, the top Selectively tap the tapping devices 11 or punches arranged in the radial direction of the turret 13 For striking, a horizontal striker movement is provided between the striker 23 and the ram body 25. A moving device 27 is provided.

0012 The radially aligned tapping devices 11 of the upper turret 13 shown in FIG. As will be described later, the tap tool is rotated through a driven gear and an idle gear. or directly interlocked with each other. Furthermore, the tapping device 11 One of them rotates coaxially and integrally with the turret upper pulley 29 supported by the turret. It is meshed with a spur gear 31.

[0013] Note that this turret upper pulley 29 is used for power transmission including a fluid pressure-operated detachable clutch. It is connected to the lower intermediate pulley 35 of the reaching device 33 by a timing belt. Furthermore, the upper intermediate pulley 37 of the power transmission device 33 is attached to the upper frame 21. is connected to the motor pulley of the drive motor 39 by a timing belt. .

[0014] With the above configuration, when the drive motor 39 is rotated, the power transmission device The upper intermediate pulley 37 of 33 is turned, and the detachable clutch is connected by fluid pressure operation. As a result, the lower intermediate pulley 35 is rotated, and the timing belt rotates the turret. The upper pulley 29 and spur gear 31 are rotated. As a result, an appropriate number of The driven gears (three in the figure) of the tapping device 11 are rotated all at once.

[0015] Next, an embodiment of this invention will be described with reference to FIG.

[0016] The punch guide 41 of the tapping device 11 is connected to the punch guide 41 of the tapping device 11. It is mounted in the mold mounting hole 43 so as to be slidable up and down. Furthermore, the punch guide 41 The lower surface of the upper flange 45 is attached to a lifting spring 47 attached to the upper turret 13. It is always urged upward and supported. In addition, the upper surface of the upper flange 45 is The punch is brought into contact with the lower surface of the first plate 51 attached to the upper surface of the turret 13. The upper limit of the vertical movement stroke of the guide 41 is regulated. Note that the lower limit is the strat It is regulated by the bottom dead center of the squid 23 and a stopper plate, which will be described later.

[0017] Next, the first plate 51 and the upper turret 13 are fixed thereon at regular intervals. A driven gear 55 is rotatably supported by a bearing on the second plate 53 . this A female spline 57 is formed on the inner peripheral surface of the driven gear 55.

[0018] On the other hand, a ball bearing 59 is provided at the upper end of the inner diameter part of the punch guide 41, and a flat bearing is provided at the middle part. is provided, and a tap tool support 61 is rotatably supported. This type A tap tool 63 is screwed to the lower end of the tap tool support 61. just However, this tap tool support 61 has a hook part 61a, and the upper part of the ball bearing 59 is hooked to.

[0019] Note that the tap tool support 61 penetrates through the inner diameter portion of the female spline 57. A male spline 61b is provided in the middle part extending to the top and penetrating through it. It is. Also, at the top end of this tap tool support 61, there is a male lead on the outer periphery. A lead nut 65 having the same shape 65a is fixed with a grooved nut and a tongue washer. .

[0020] Furthermore, a lead screw having a female lead screw 67a that engages with a male lead screw 65a is provided. The same pipe 67 is vertically slidable and non-rotatable on the second plate 53 by a feather key. Supported by Noh.

[0021] Now, FIG. 2 shows the driven gear 55, the upper flange 45 of the punch guide 41, and the lifting gear 55. FIG. 4 is a plan layout diagram showing the arrangement of the springs 47, and the driven gear 55 is A droop meshed with the gear 31, which also shares a shaft with the spur gear 31 and rotates at the same time. The upper pulley 29 is connected to the lower intermediate pulley 35 in Fig. 3 by a timing belt. It is. According to this FIG. 2, the driven gear 5 of the adjacent tapping device 11 5 are directly meshed with each other.

[0022] There is a pad around the tap tool 63 attached to the lower part of the tap tool support 61. so as to surround this tap tool 63 when it is in the raised position relative to the punch guide 41. A cylindrical plate retainer 69 is arranged. This plate holder 69 is attached to the punch guide 4 It is inserted into the inner periphery of the lower end of the punch guide 4 so that it can slide vertically. Between the inner flange portion 71 formed on the upper inner periphery of 1 and the upper end surface of this plate retainer 69 The presser spring 73 inserted into the plate holder 69 always applies a downward spring force to the plate holder 69. is energized. Furthermore, in order to prohibit rotation of the plate holder 69, a key groove 77 is provided. is provided on the plate retainer 69 side, and the key 75 attached to the lower part of the punch guide 41 is inserted into this It is engaged with the key groove 77 so that only vertical sliding movement is possible.

[0023] Next, the operation of the punch press tapping device having the above configuration will be explained.

[0024] First, in FIG. 8, the striker 23 is attached with a desired tap tool 63. is positioned over the desired tapping device 11.

[0025] Next, when the ram body 25 is lowered, the striker 23 is also lowered, and its lower surface is The upper surface of the threaded pipe 67 is contacted.

[0026] When the striker 23 is lowered to the bottom dead center, the attachment of the lifting spring 47 in FIG. The tap tool support 61 and the tap tool 63 along with the punch guide 41 resist the force. Since the tap tool 63 is lowered by a certain height, the desired tap tool 63 can be quickly attached to the workpiece W. be approached. At this time, the male spline 61b of the tap tool support 61 It engages with the female spline 57a of the pline cylinder 57. In addition, the lead screw pipe 67 is also spun. It is pushed down by a certain height by the striker 23, and at this time, together with the tap tool 63, , the plate retainer 69 also descends and comes into elastic contact with the workpiece W by the action of the retainer spring 73. Press it down as if pressing it down.

[0027] Next, the desired tap tool 63 rotates the drive motor 39 in FIG. 3 in the machining direction. When the clutch of the power transmission device 33 is connected, an appropriate number of The driven gears 55 of all the tapping devices 11 (three in the embodiment) are driven by a pulley on the turret. 29, is rotated via spur gear 69. However, at this time, the striker 23 In the tapping device 11 that is not approached, the male spline 61b and the female spline Since the in 57a is not engaged, the tap tool support 61 does not rotate.

[0028] Then, only the tapped tool support 61 that has been approached is tapped in the machining direction. It is rotated together with the tool 63. Then, the lead screw pipe pressed against the striker 23 A lead nut fixed to the tap tool support 61 on the female lead screw 67a of 67 Since the male lead screw 65a of 65 is engaged, the tap tool support 61 and the tap The tool 63 enters the punch hole of the workpiece W while descending by one lead per rotation. to start tapping. At this time, the punch guide 41 also and descends the same distance via ball bearings 59.

[0029] When the tap tool 63 is lowered, the plate holder 69 that is in elastic contact with the workpiece W is Since it cannot descend any further, the presser spring 73 bends and taps. Do not obstruct the descent of the tool 63. At this time, the key 75 is in the key groove. 77 to prevent the plate holder 69 from rotating.

[0030] When the tapping process is completed, the clutch of the power transmission device 33 is disengaged, and the drive motor Turn the clutch 39 in the opposite direction to the one used during machining and turn the clutch on again. The lead threaded pipe 67 of the wrapping device 11 has male and female lead threads 65a and 67a. So, it increases by 1 lead per revolution. Therefore, the desired tap tool 63 is , and return to the original approach position by exiting the workpiece W without damaging the tapping hole. Return to Therefore, when the clutch of the power transmission device 33 is disengaged and the drive motor 39 is stopped, , rotation of all driven gears 55 is stopped.

[0031] Next, when the striker 23 is raised, the tapped tool 63 that has been approached top tool support 61, punch guide 41, lead nut 65 and lead threaded pipe 67, the upper flange 41a is moved to the first plate 5 by the biasing force of the lifting spring 47. It follows and rises by a predetermined height until it comes into contact with the lower surface of 1. And at this time too, Since the plate holder 69 elastically holds down the workpiece W, the tapping tool 63 does not rise. Accordingly, the workpiece W is prevented from being tangled and raised, and as a result, the desired tap tool 63 is removed from the workpiece W and returned to the approach position without damaging the tapping hole. can be done.

[0032] When the striker 23 further rises, its lower end becomes the upper end of the lead threaded pipe 67. and return to the position before the machining cycle.

[0033] In this way, the tapping device for a punch press of this embodiment can perform tapping operations. When tapping a workpiece with a tool, the plate holder first comes into elastic contact with the workpiece. In this state, insert the tapping tool into the punched hole and tap it. Tapping processing can be performed correctly at the predetermined processing position of the workpiece. be able to do it.

[0034] Note that this invention is not limited to the above embodiments, and can be applied to various punch presses. Hold the plate holding member at the bottom of the punch guide of the tapping device and use the spring member to It can be widely applied by attaching it.

[0035]

[Effect of the idea] As described above, according to this invention, the plate is held down so as to surround the tap tool. This plate holder is connected to the lower part of the tap tool guide via a spring member. When the tapping tool approaches the workpiece, a plate holder is used to prevent tapping. Hold down the area around the hole you are about to drill, and tap it while keeping the workpiece fixed. It is possible to perform tapping processing, especially when performing tapping processing on thin plate workpieces. When the workpiece is warped, undulated, or moved, the tap tool can be used to accurately place the workpiece in the specified position. can be used to guide the workpiece, allowing for highly accurate tapping machining. Prevents unexpected accidents such as colliding with the tap tool and breaking the tap. can.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of this invention.

FIG. 2 is a plan layout diagram of the main components of the above embodiment.

FIG. 3 is an overall view of a typical turret punch press.

[Explanation of symbols]

1...Turret punch press 11... Tapping device 13...Upper turret 23... Striker 27...Strike horizontal movement device 41...Punch guide 43...Mold mounting hole 61...Tap tool support 63...Tap tool 69...Plate holder 73...pressing spring 75...key 77...Keyway

Claims (1)

[Scope of utility model registration request] 1. A tapping device for a punch press that is installed in a tool mounting hole of a punch press, wherein a cylindrical guide is provided on the outside of a tap tool support body to which a tap tool is attached to the lower end to guide the vertical movement of the tap tool support. A cylindrical plate holder is arranged to surround the tap tool exposed downward from the lower end of the guide in the raised position of the tap tool, and the plate holder and the lower part of the guide are connected via a spring member. A tapping device for a punch press, characterized in that the plate holder is retracted to the guide side by being coupled to the plate holders.