EP1043087B1 - Shaft straightening and hardening machine - Google Patents

Abstract

Shaft straightening and hardening machine, comprises parallel straightening shafts one of which can pivot away for workpiece (20) shaft loading and unloading. A shaft straightening and hardening machine comprises a rotating holder which passes through a coolant bath (2) through and which has several parallel straightening shafts between which the workpiece shaft is inserted, each straightening shaft being held at ends in bearing supports and having radially projecting profiles as straightening devices, one of the straightening shafts being capable of radial pivoting for workpiece shaft loading and unloading.

Description

The invention relates to a shaft straightening and hardening machine, with a receptacle for a wave-shaped workpiece, which is about a to the axis of the workpiece in substantially parallel axis is rotatably supported with a controlled Rotary drive for the recording and a coolant bath, which the recording traverses on part of their rotation path, as well as with at least one on one predetermined position of the length of the workpiece arranged straightening means, which the workpiece is loaded radially and for loading and unloading the workpiece from are pivotable.

In a known shaft straightening and hardening machine (brochure Hahn & Kolb Stuttgart, No. 2510/24) the wavy workpiece is placed in a loading and Unloading station clamped between two headstocks. Furthermore, there are several Straightening roller groups exist along a bed parallel to the workpiece axis can be moved to those points along its length at which the workpiece specified guideline should be applied. For loading and unloading the A straightening roller of each straightening roller group can be swiveled radially. The Rotary drive guides the intake with the delivered straightening rollers through the Coolant bath, usually an oil bath, for workpiece quenching. After this Emerging from the oil bath becomes the hardened workpiece after swiveling the straightening rollers removed from the headstocks.

This relatively selective straightening of the workpiece can then lead to one lead to undesired impairment of the workpiece if there is one or there are several axial, possibly also eccentric bores.

The invention aims to improve this type of machine.

This is the case with the shaft straightening and hardening machine explained at the beginning According to the invention provided that the recording of several parallel directional waves between which the workpiece can be inserted and removed, where each straightening shaft is held on its end faces in a lab block and one the straightening shafts can be swiveled radially, and the straightening shafts being radial have the above profiles as a guide. Loading and unloading the Workpieces are significantly simplified by the invention and thus accelerates because a workpiece between two fixed expedient Straightening shafts only need to be inserted or removed from them, without that the pedestals would have to be adjusted. Therefore, the bearing blocks on the Machine be fixed translationally. In addition, the manufacture of the Straightening means by appropriate profiling of the straightening shafts outside the The machine is simplified when several points are aligned along the workpiece should be. Only one set of straightening shafts is used for a certain type of workpiece needed, which are clamped once in the pedestals and there independently of workpiece changes remain. For those mentioned, with one or more Workpieces provided with axial bores then prove to be the invention Particularly advantageous if the profiles have a relatively large axial width.

Preferred embodiments of the invention are otherwise in the Subclaims specified.

Figur 1:

eine schematische Darstellung einer Aufnahme mit Richtmitteln für ein wellenförmiges Werkstück in einer Wellenricht- und-härtemaschine aus dem Stande der Technik;

Figur 2:

eine aus drei profilierten Richtwellen bestehende Aufnahme mit eingefügtem wellenförmigen Werkstück;

Figur 3:

die Aufnahme nach Figur 2 in geöffnetem Zustand mit inliegendem Werkstück und

Figur 4:

eine offene Aufnahme mit den Richtwellen nach Figuren 2 und 3, wobei rechte Richtwellengreifer zur Erläuterung der Darstellung seitlich zurückgezogen sind.

An embodiment of the invention is illustrated in the accompanying drawing and explained in detail below. Show it:

Figure 1:

a schematic representation of a recording with straightening means for a wave-shaped workpiece in a shaft straightening and hardening machine from the prior art;

Figure 2:

a recording consisting of three profiled straightening shafts with an inserted wavy workpiece;

Figure 3:

the recording of Figure 2 in the open state with the workpiece and

Figure 4:

an open receptacle with the directional shafts according to Figures 2 and 3, wherein right directional shaft grippers are laterally withdrawn to explain the representation.

The whole designated 1 and shown schematically in Fig. 1 Shaft straightening and hardening machine first has a trough 2 containing oil 3 as Coolant and a rotatably mounted in the tub in a manner not shown Drum 4 on. At the two end faces, the drum 4 is over one each Chain 5, 6 or the like coupled with a rotary drive. On the about that Oil 3 uprising top of the drum 4 sit near the two end faces one headstock 10, 12 each on a bed 14 at the top of the drum 4th are displaceable in the direction of the two double arrows 11, 13. Between Grain tips 15, 17 facing one another are in the known machine 1 a wave-shaped workpiece 20 stored and at least one with a the headstocks 10, 12 coupled motor driven in rotation. Over the length of the Workpiece 20 are four straightening roller groups in the exemplary embodiment shown 22, 24, 26, 28 at locations of the length of the workpiece 20 on the bed 14 arranged on which the workpiece 20 must be directed. Each Straightening roll group 22, 24, 26, 28 usually consists of three straightening rolls, which are in The workpiece 20 is evenly distributed radially according to the circumferential direction apply the set pressure. When the workpiece is in the shaft straightening and hardening machine is adjusted as shown in Fig. 1, the drum 4 by the rotary drive, not shown, about a to the axis of the workpiece 20th parallel axis rotated that the warm, possibly red glowing workpiece 20 immersed in the oil 3 and quenched there.

The known shaft straightening and hardening machine 1 shows the Recording by the headstocks 10, 12 and the associated center points 15, 17 formed, the top straightening rollers each for inserting the workpiece 20 Straightening roller pair must be pivoted radially. The guide for that Workpiece 20 clearly forms the straightening roller groups 22, 24, 26, 28.

In the invention according to FIGS. 2 to 4, there is a receptacle 50 for a wave-shaped workpiece 30 made of three parallel alignment shafts 42, 44, 46. Each of the straightening shafts 42, 44, 46 is on the end face in each case as a center point trained straightening shaft gripper held axially immovable, namely the first Straightening shaft 42 between center points 41 and 43, the second straightening shaft 44 between the grain tips 45 and 47 and the third directional shaft 46 between the Grain tips 49 and 51 (Fig. 4). Each center of the grain is from a bearing block before, namely the center point 41 from the bearing block 52, the center point 43 the bearing block 54, the center point 55 from the bearing block 56, the center point 47 from the bearing block 58, the center point 49 from the bearing block 60 and finally the center point 51 from the bearing block 62. The for receiving the Directional shafts 42 and 44 provided bearing blocks 52, 54 and 56 and 58 are on the bed of the shaft straightening and hardening machine, not shown below (For example on the bed 14 of Figure 1) firmly attached. The pedestals 60 and 62 are each mounted on a swivel arm 61, 63, which on the Drum pivotable about an axis parallel to the axis of the alignment shaft 46 are articulated.

In the illustrated embodiment are in on one side of the machine arranged bearing blocks 54, 58, 62, not shown in detail, controllable Moving means housed, which allow the grain tips 43, 47, 51 axially to move translationally. The grain tips 43, 47, 51 can therefore by Moving means are moved sideways so far that the straightening shafts 42, 44, 46 between the grain tips intended for them by not shown hoist can be inserted or removed. Are in operation the straightening shafts 42, 44, 46 in any case rotatably with the driven one Grain tip 41, 45, 49 connected, the respectively opposite Grain tips 43, 47, 51 are provided with the required rotary freewheel.

If in the loading and unloading station not shown in detail According to the shaft straightening and hardening machine, the swivel arms 61, 63 3 and 4 are pivoted so that the directional shaft 46 of the two non-pivotable straightening shafts 42, 44 can be lifted sufficiently far the workpiece 30 in the gap between the two by the aforementioned hoist Straightening shafts 42, 44 according to FIG. 3 are introduced. After that, the top one Straightening shaft 46 lowered so that the tool 30 of the three straightening shafts 42, 44, 46 is captured according to Figure 2 and radially by corresponding actuation of the Arms 61, 63 can be acted upon by the desired directional pressure.

First of all, it should also be noted that for the axially secure mounting of the Workpiece 30 each straightening shaft 42, 44, 46 a radial on each end face has protruding collar, which is designated for the directional shaft 46 with 37, 39, so that the workpiece 30 captured between the collars 37, 39 axially defined remains.

The straightening means in the invention are corresponding profiles of the jacket each of the directional shafts 42, 44, 46. Thus, the directional shaft 42 is on one workpiece-specific preselected location, a first radially projecting alignment ring 32 worked out, the workpiece 30 at the desired location immediately acted upon. Over another area of the workpiece length, one is relatively wider Rich ring 34 is formed, and the end portion of the workpiece 30 is through contacted a third alignment ring 46 of the alignment shaft 42. According to the Straightening shafts 44 and 46 with respect to the longitudinal direction of the workpiece 30 on the Straightening rings 32, 34, 36 exactly aligned straightening rings 72, 74, 76 (on the straightening shaft 44) and 82, 84, 86 (on the alignment shaft 46). The location of the alignment rings is subject to the length of the workpiece 30 and the width of the straightening rings there are no restrictions on the directional shafts 42, 44, 46, this dimensioning can rather be chosen as it from the desired alignment of the Workpiece 30 ago is required.

It can be seen that the directional shafts 42, 44, 46 as long as between the associated Grain tips can remain clamped like workpieces of the same type to be aligned and hardened. As long as the type of workpiece 30 remains the same, no further adjustment is required on the machine, it is sufficient that insert warm workpiece 30 into receptacle 50, receptacle 50 too close to turn the drum so that the straightening shafts 42, 44, 46 with Walk workpiece 30 in the desired manner through the oil bath and then by opening the receptacle 50, the workpiece 30 is closed again from the receptacle 50 remove.

Claims (8)

1. Shaft straightening and hardness machine, with a mount for a shaft-shaped tool, which is rotatably mounted around an axis essentially parallel to the axis of the tool, with a controlled rotation drive for the mount and a coolant bath, which runs through the mount on a section of its rotation path, together with at least one means of straightening, mounted at a pre-set point on the length of the tool, which radially impinges on the tool and can be pivoted away from the tool for the loading and unloading of the same, distinguished by the fact that the mount (50) has several parallel straightening shafts (42, 44, 46), between which the tool (30) can be inserted and out of which it can be removed, with each straightening shaft (42, 44, 46) being held by a pillow block on each face (52, 54; 56, 58; 60, 62), while one of the straightening shafts (46) can be radially pivoted away, and with the straightening shafts (42, 44, 46) having radially protuberant profiles (32, 34, 36; 72, 74, 76; 82, 84, 86) as means of straightening.
2. Machine as Claim 1, distinguished by the fact that each of the pivotable pillow blocks (60, 62) of the pivotable straightening shaft (46) is fastened to a pivot arm (61, 63) which is fastened to the machine and is pivotable around an axis parallel to the axis of the straightening shaft (46).
3. Machine as one of the preceding claims, distinguished by the fact that the profiles of the straightening shafts (42, 44, 46) take the form of radially protuberant rings (32, 34, 36; 72, 74, 76; 82, 84, 86) of varying axial length.
4. Machine as one of the preceding claims, distinguished by the fact that at least the pillow blocks (54, 58, 62) provided for on one side of the straightening shafts (42, 44, 46) are fitted with controllable means of displacement for the axially translatory movement of straightening shaft grippers (43, 47, 51), so that, when the associated straightening shaft grippers (43, 47, 51) are moved back, it becomes possible to insert and remove the straightening shafts (42, 44, 46).
5. Machine as Claim 4, distinguished by the fact that the straightening shaft grippers are lathe centres.
6. Machine as one of preceding claims, distinguished by the fact that each straightening shaft has a radially protuberant shoulder (37, 39) at each of its face ends.
7. Machine as one of Claims 4 - 6, distinguished by the fact that the pillow blocks are permanently fastened translatorially to the machine.
8. Machine as one of preceding claims, distinguished by the fact that the mount (50) has two fixed straightening shafts (42, 44), together with a pivotable straightening shaft (46).

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