JPH0338043B2 - - Google Patents

Description

[Detailed Description of the Invention] Peeling of bars and tubes is a process in which a plurality of bars and tubes of limited length are peeled at a high feed rate in the final process of processing each bar or tube.
The problem is that the bars that come in close succession may fall out of this row, get stuck in the middle, or be transferred laterally for another purpose.

In a wire rod peeling machine, in order to prevent the wire rod from being threaded, the feed speed should be lowered at the end of processing, as described in the patent application published in 1978.
It is known from Publication No. 50082. Therefore, it has been proposed to change the feed rate at the end of the peeling process. However, this procedure does not allow for axial separation of the bars in sequence. Rather, the peeling efficiency is reduced at the end of the process, which has a significant impact on the efficiency of the peeler in the case of short workpieces. In the case of the peeling machine described in the above-mentioned publication, the above-mentioned point of view is ignored, since the wound wire is so long that the end portions are rarely processed.

The concept of non-rotatable clamping means that the cutter head rotates and the workpiece does not rotate.

The small inherent angular momentum of the workpiece, such as that caused by sliding or by a feed roller limited to a small angle, also implies the concept of a "non-rotatable clamping".

The object of the invention is to take out the workpieces one after the other, which come out of the peeling machine axially continuously and rapidly and with almost no relative clearance.

This object is achieved by the measures specified in the characterizing part of claim 1. Since the bars are separated by acceleration, a relative gap is created and thus easy individual lateral transfer is possible.

An improvement in the further transport of peeled workpieces is achieved by the method according to claim 2. A workpiece that is delivered at a particularly different special speed, independent of a constant axial speed, has an axial position that is better predictable in advance than a workpiece that is ejected at a greater speed and can thus be gripped precisely or It is supplied to processing machines or temporarily stored. The change in axial speed according to claim 2 is mostly a deceleration;
This may be increased if the feed rate is very small. However, the advantages of the invention exist in the case of large feed rates.

The range of set speeds listed in claim 3 is such that, on the one hand, there is a sufficient gap between successive bars to allow the bars to be removed from the peeling line; On the other hand, this feature guarantees a small control range in the final axial position of the workpiece after it leaves the peeler.

For example, the peeling machine whose basic concept is known from West German Utility Model Publication No. 1799939,
It is stated in the generic part of claim 4. The characterizing part of patent claim 4 comprises a solution for achieving the above-mentioned speed course. The specific solution is determined by the control mode of the extraction device.

Particularly advantageous is the electrical solution according to claim 5, which makes it possible to obtain a harmonious velocity-stroke profile for the workpiece. The final machining of the workpiece and the corresponding operation of the drawing device is triggered by a pulse transmitter, for example a light barrier. The axial movement of the peeled workpiece is now carried out by the pulling device or by a chuck carriage which is arranged between the cutter head and the pulling device. The extraction device axially accelerates the workpiece and separates it from other workpieces still in the peeling process. In this way, as soon as possible before the workpiece leaves the drawing device, the workpiece is braked to a small axial speed in any case with a large feed rate, and at this axial speed reduced to the set value the peeler drawn from. Each acceleration is actuated by a length measuring device. Since the stroke the workpiece advances is independent of the selected feed rate and is dependent on the configuration of the peeler, there is no need to adjust speed changes to different axial speeds. The increase in axial speed is adjusted to the feed rate as described above and determined in the control device of the drawing device.

The requirement that short workpieces can also be processed is taken into account by the embodiment according to claim 6. This embodiment is necessary when stripping short workpieces. The measurement result of the length measuring device on the feed device upstream of the cutter head is taken over by the length measuring device on the extraction device;
will be replenished. This is due to the fact that in the case of short workpieces, the length measuring device on the exit side cannot yet be activated, since the extraction device has not yet grasped the workpiece.

As an alternative to this electrical solution, the embodiment according to claim 7 can be used, which is characterized by the use of two drives.

The part of the velocity profile of the workpiece in the drawing device which is introduced from the feed rate is branched off from the drawing device by a mechanical connection. For this purpose, at least two controllable clutches are required, by means of which the drive power, which is branched off from the feed device of the drawing device, is input or the axial speed is reduced at the end of the feed. An independent three-phase motor used for this purpose is turned on. This axial speed (set speed) at which the workpiece leaves the peeler is:
It is independent of the feed rate chosen for the peeling process. In each case, as stated in claim 8, a chuck truck is additionally provided between the cutter head and the extraction device, which takes over the actual function of pulling out the workpiece from the cutter head. I suggest that you do it. In this case, the extraction device acts only with regard to the acceleration or separation of the individual workpieces and the braking for carefully extracting them. If an auxiliary chuck truck is not provided, the drive branched off from the feed device must be equipped with a further switching stage, so that the pulling device can be removed from the area of the cutter head during the final part of the pulling process. must also be accepted. In this case, the control device for the extraction device must have three clutches. The first clutch is used to load the workpiece into the switching stage for taking up the workpiece at the feed rate, the second clutch is used to load the workpiece into the switching stage at twice the feed rate, and the third The clutch is used to engage a separate AC motor for the final extraction of the peeled workpiece from the peeler.

The present invention will be described in detail below based on embodiments shown in the drawings.

In FIGS. 1 and 3, reference numeral 1 indicates a feed device of the peeler. This peeling machine includes a rotating cutter head 2, a pulling device 3, a DC motor 4 for this pulling device, a length measuring device 5, 78, and a feeding device 1.
Pulse transmitter 6 and control device 2 in front of
1. This control device 21 includes wiring 18,
It is connected to the pulse transmitter 6, the DC motor 4 and the length measuring devices 5, 78 via 19, 20, 79, respectively. The control device 21 is a pulse transmitter 6
and preferably an electronic control element for converting the signals of the length measuring devices 5, 78 into control variables for the DC motor 4. The feed device 1 has two feed rollers 7, 8 which move the workpiece 17 through the peeler by rotating in the direction of arrows 23, 24. The feed rollers 7, 8 are driven by a motor (not shown). Two cutter holders 9 and 10 are supported on the cutter head 2 so as to be movable in the radial direction toward the rotation axis of the cutter head 2. The cutter head 2 rotates in the direction of arrows 13,14.
Peeling cutters 11 and 12 are fastened and fixed to the inner ends of the cutter holders 9 and 10. These cutters 11 and 12 cut off the surface layer of the round bar work 17 along a spiral trajectory. The cutter head 2 is driven by a motor, not shown. As soon as the pulling device 3, which has two rollers 15, 16 with grooves on their outer circumference, takes over the feeding of the workpiece 17, the feeding rollers 7, 8 are disengaged in the final stage of the peeling operation.
The work 17 is pulled out from the cutter head 2, and the pull-out rollers 15 and 16 simultaneously prevent the work 17 from rotating. During this process, the end face of workpiece 17 and the end face of the next workpiece 29 are still in close contact with each other, as indicated by the broken lines in FIG. The axial speed 71 of the workpiece 17 until the peeling work is completed.
is constant. As soon as the peeled workpiece 17 leaves the peeling cutters 11, 12, the feed rate 71 is followed by an acceleration phase 72. During this acceleration, the axial speed is increased to approximately twice the feed rate 71, in particular to the axial speed 73 shown. During this period of increased axial speed 73, a gap is created between the workpiece 17 and the next workpiece 29.

After the distance has reached, for example, 1 meter, the axial speed transmitted to the peeled workpiece by the pulling rollers 15, 16 is reduced in a braking process 74 to a speed 70, at which speed the workpiece 17 is pulled out. Completely leave the rollers 15, 16 and thus the peeler. This axial speed 7
0 is usually at a much lower value than the feed rate 71. This reduced speed 7 when feeding the workpiece
0, all the workpieces can be brought to a standstill in a limited and narrow area, viewed in the axial direction, in order to be traversed to as precise an axial position as possible. The feed speed of the pull-off rollers 15, 16 is then increased again to speed 71 in order to receive the next workpiece 29.

While the first workpiece 17 is being peeled, the next raw workpiece 29 is placed on the roller table 80 transversely to its longitudinal direction (in the direction of arrow 81). A distance is thereby created between the workpieces 17 and 29. The end 69 of the workpiece 17 is detected by a pulse transmitter 6 which is designed as a light barrier. The length measuring device 78 then starts measuring. At an intermediate time, the workpiece 29 on the roller table 80 continues and contacts the rear end 69 of the workpiece 17 . As soon as the workpiece 17 reaches the extraction device 3, the length measuring device 5 is activated and the workpiece 17 is pulled out of the cutter head 2 up to the workpiece end 69 and accelerated (step 72). The control device 21 determines the start and end points of each speed and acceleration process based on the axial length of the workpiece detected by the pulses of the pulse transmitter 6.

The most precise axial position of the drawn-out and peeled rod or tube is particularly well obtained with the peeler according to FIG. This peeling machine is composed of a feeding device 30, a cutter head 31, a chuck truck 32, and a pulling device 35. A pulse transmitter 38 connected to the control device 33 is arranged in front of the feeding device 30. The extraction device 35 is connected to a length measuring device 54, the output signal of which is given to the control device 33 via a wiring 75. The pulling device 35 includes a grooved roller 52,
53, and these rollers 52, 53 are driven by a controllable motor 34.

The feed device 30 is provided with a further length measuring device 82, which is connected via a line 83 to the control device 33.

The rollers 36 and 37 of the feeding device 30 have grooves on their outer peripheries like the rollers 52 and 53 of the above-mentioned pulling device 35, and are rotated by a motor (not shown). These rollers 36, 37 move the workpiece axially through the peeler and prevent it from rotating. In the illustrated position, the rollers 36, 37 move the next workpiece 76 closely behind the workpiece 43 being machined. In that case, the original tightening and transportation of the workpiece 43 is carried out by the chuck cart 3 in the final process.
It is done in two steps.

Cutter holder 39, 40 and peeling cutter 4
A cutter head 31 having a cutter head 1 and 42 cuts off the surface layer of a workpiece 43. The cutter head 31 rotates in the directions of arrows 55 and 56.

A chuck truck 3 is placed on the exit side of the cutter head 31.
2 is arranged, and the chuck truck 32 is movably guided in the direction of the arrow 84 within the guide track 49. The chuck carriage 32 is fixed in a radial position relative to the workpiece by rollers 50, 51 within the guide track 49. The chuck truck 32 is moved in the feed direction by means of a cylinder arrangement or similar drive, not shown. The chuck truck 32 has two clamping jaws 44 and 45, one of which is fixedly connected to the chuck truck 32, and the other clamping jaw 44 is used to tighten or loosen the workpiece 43 by means of a clamping cylinder 46. In order to do this, it is supported so as to be movable in the radial direction relative to the workpiece 43. As shown by the lower clamp 45 in the embodiment, the clamping jaws 44, 45 are grooved in accordance with the cross-sectional shape of the workpiece, so that the workpiece can be reliably gripped with a small surface pressure. It is being done. The use of a chuck truck 32 in addition to the pulling device 35 has the advantage that the stroke length, which serves to separate the two workpieces, is greater than when using the pulling device alone. The required acceleration can thereby be easily obtained.

The embodiment of FIG. 3 corresponds to the embodiment of FIG. 1 with respect to the main parts. The drive layer of the drawing device differs from the embodiment of FIG. Unlike the DC motor shown in FIG. 1, multistage drive of the drawing roller is achieved by using two different drive sources.

Power for the pulling device 3 is introduced from feed rollers 7 and 8. This applies for the course of the feed rate 71 according to FIG. 1 and for the acceleration process increasing to the axial speed 73. Both speeds applied to the workpiece by the drawing device are determined depending on the feed rate determined by the feed device. In order to carefully feed the workpiece, the drive of the pulling device is switched to a motor with a constant rotation speed (set rotation speed). Switching clutches 61 and 63 are used for this switching. The embodiment of the drive described so far can also be applied when using a chuck truck as shown in FIG. If no chuck truck is used, as shown in FIGS. 1 and 3, the auxiliary speed gear must be taken into account by means of an auxiliary gearing 60 or auxiliary gearing stages. In the first variant, the workpiece is exclusively given an increased axial speed 73 (twice the feed rate 71) by the drive of the drawing device, while the course of the feed rate 71 is exclusively applied to the chuck carriage. It is generated accordingly. A second speed stage introduced from the feed device and illustrated in thin lines also allows the drawing device to take over the course of the feed speed 71.

The drive shown in FIG. 3 is switched as follows. During the feed process 71 (no chuck truck is used), the switching clutches 61 and 63 are disconnected. The switching clutch 62 is engaged to pull the workpiece 17 out of the cutter head. Clutch 62 is then disengaged and clutch 61 is engaged. Since the transmission ratios of the miter gear 67 and the miter gear 59 are different, the above-mentioned approximately 2
A doubled speed 73 results. In order to carefully withdraw the stripped rod 17, the clutch 61 is again disengaged and the clutch 63 is connected to the motor 6.
4 to the extraction device 3. To receive the next rod 29, clutch 62 is reengaged and at the same time clutch 63 is disengaged. When a chuck truck is used, the clutch 62 is replaced by controlling the tightening jaw of the chuck truck.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a peeling machine with a workpiece feed control device, Fig. 2 is a schematic diagram of a peeling machine with an auxiliary chuck truck, and Fig. 3 is a schematic diagram of a peeling machine with an auxiliary chuck truck. It is a block diagram of a different Example. 1... Feeding device, 2... Cutter head, 3...
... Pulling device, 4 ... DC motor, 5 ... Length measuring device, 6 ... Pulse transmitter, 7, 8 ... Feed roller 7, 11, 12 ... Peeling cutter, 15,
16... Pulling roller, 17... Workpiece, 21...
...Control device, 29...Work, 32...Chuck truck, 61, 62, 63...Clutch, 64...
Three-phase motor, 70...setting speed, 71...feeding device, 73...accelerating speed, 78...length measuring device.

Claims (1)

[Claims] 1. The round workpieces 17, 29 are first fixed in a non-rotatable manner at their unprocessed longitudinal parts, then fed in the axial direction, and at the end of machining, their finished end parts are fixed in a non-rotatable manner. The metal rods and tubes are peeled and conveyed axially until the workpiece leaves the peeler, and during the feeding process it is peeled along a spiral trajectory, and in the final process the axial speed is varied. A method for peeling metal rods and tubes, characterized in that the axial speed is increased after the end of the peeling process and before deceleration. 2. The peeling method according to claim 1, characterized in that after increasing the axial speed, this speed is reduced to a set speed of 70. 3. The peeling method according to claim 2, characterized in that the set speed 70 is between 5 and 40 meters per minute. 4. The round workpiece is first fixed in a non-rotatable manner at its unprocessed longitudinal part, and then fed in the axial direction,
At the end of machining, the machined end part is fixed non-rotatably, and the workpiece is conveyed axially until it leaves the peeler, and is peeled along a spiral path during the feeding process, and finally In a peeling machine for peeling metal rods and tubes, the workpiece 1
a feeding device 1 of 7, a rotary cutter head 2, a pulling device 3 for peeled workpieces 17 comprising at least one set of rollers 15, 16, and the speed of the peeled workpieces 17 moved by the pulling device 3; a control device 21 for changing the drawing device 21, which comprises at least one pulse transmitter 6 for detecting the approaching workpiece edge and at least one length measuring device 5; A metal rod and pipe peeling machine characterized in that a multi-stage drive device is provided as a drive device. 5 A direct current motor 4 is provided for driving the pulling rollers 15, 16, a pulse transmitter 6 is arranged in the region of the feed device 1, and at least one length is provided in the pulling device 3 for feeding the peeled workpieces. 5. A peeling machine according to claim 4, characterized in that a thickness measuring device (5) is arranged and an electronic control device (21) is provided for converting the pulses into control signals for the DC motor (4). 6. A second length measuring device 78 is provided, which length measuring device 78 is arranged in front of the cutter head in the area of the feed roller and is connected to the control device 21 via a line 79. A peeling machine according to claim 4. 7 Two drives 57, 6 for the extraction device 3
4, a three-phase motor 64 and drives 57-62, 67 branched off from the feed device 1 alternately and selectively form the drive of the extraction device 3, these drives driving the switching clutches 61-61. 5. Peeling machine according to claim 4, characterized in that it is connected to the extraction device 3 by 63. 8 At the exit side of the peeler, the pulling roller 5
5. The peeling machine according to claim 4, further comprising a chuck truck 32 in front of the workpiece as seen in the feed direction of the workpiece.