JP2002263757A - Rotary swaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary swaging machine capable of considerably reducing the pressing load required for the swaging, improving the energy consumption, solving a problem of deflection of a work by reducing the pressing load, and improving the accuracy of a swaging part. SOLUTION: Swaging rollers 4 perform the swaging in a revolving manner with respect to the surface of the work by rotating a swaging roller holder 21 in contact with the work in an inscribing manner with three sets of swaging rollers 4 disposed in a planetary shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary swaging machine capable of revolutionary swaging at a joint such as a steel pipe.

[0002]

2. Description of the Related Art In a conventional swaging machine, a steel pipe is held by a fixing chuck, an end receiving block and a plurality of receiving frames, and is a solid-type press-fit swaging machine.
The top is fixed to the tip of the hydraulic cylinder rod,
Since the tip of the steel pipe is plastically deformed by applying a strong pressing force, the rigidity of the machine body is required, so it is necessary to have a structure that is strong against bending. It is much more robust and requires a powerful hydraulic cylinder.Moreover, in order to prevent bending due to buckling of the steel pipe in the process of pressing, it is necessary to provide multiple receiving pieces, such as having many problems. there were.

[0003]

Since the conventional swaging machine employs a solid-type press-fit swaging frame as described above, a large pressing force, for example, 8 tons, is applied during swaging. In order to prevent the bending of the steel pipe due to the buckling load during processing, it is necessary to use multiple receiving pieces to make the machine body highly rigid, and when processing steel pipes with different lengths. There are many issues such as the necessity of changing the position of the end block, and the development of an efficient swaging machine has been awaited.

[0004]

In order to solve the above-mentioned problems, in a rotary swaging machine according to the present invention, three sets of drive flanges provided on the shaft end of a drive spindle rotated by a drive motor are provided. A swaging roller holder comprising a flanged housing having planetary swaging rollers arranged thereon is attached with a flange portion, and the workpiece held by a fixing chuck is subjected to the three sets of swaging rollers described above. Are arranged so that they can be guided in such a manner as to be inscribed in the center of the drive shaft, and the entire drive main shaft can be pushed and pulled by a predetermined stroke by a hydraulic cylinder or the like.

[0005] With the above configuration, the swaging portion of the workpiece is subjected to plastic working in a shape following the surface shape of the swaging roller rolling in a planetary manner. It has become possible to perform swaging on the front end of the work piece under a light load condition. In the rotary swaging machine according to the present invention, since the cylinder load required for pressing can be reduced to 1/8 of 1 ton, the rigidity of the machine frame can be greatly reduced.
The total weight of the conventional machine 5 tons is reduced to 0 and 2 tons, and the installation space can be significantly reduced from 1 mx 2.5 m to 0.5 mx 1.35 m in the installation space. In addition, the layout can be easily moved when changing the layout, and the installation space can be reduced, resulting in significant economic effects.

[0006] Further, by significantly reducing the pressing load required for the swaging process, the problem of bending of the workpiece is eliminated, and the accuracy of the swaging portion is improved. It is possible to minimize the increase in wall thickness by the method, and the yield has been improved.They also show that in the material surface of the work material, in the swaging of non-ferrous pipes with low buckling load, By setting appropriate processing conditions, it is possible to cope with maintaining sufficient quality.

In the rotary swaging process, only one set of fixing chucks A is sufficient to hold the workpiece,
This eliminates the need for changing the end block, which is required when changing the length of the workpiece in the conventional method, and improves the processing efficiency.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of the swaging roller holder of the present invention. In the figure, a state in which a flange portion of a swaging roller holder (2) is fixed to an end face of a drive flange (1) provided at an end portion of a drive spindle driven by a drive motor with three mounting screws (3). Is shown. In the housing of the swaging roller holder (2), three sets of swaging rollers (4) are positioned by individual roller mounting pins (5), and the center of the end face of the housing is processed. A material guiding hole (7) is provided. The surface of the swaging roller (4), whose tip is fed into the workpiece guide hole (7) and revolves while the workpiece (8) is clamped by the fixing chuck A (9). It is as described in the previous section that it is processed in a plastically deformed state along.

The swaging by the rotary swaging machine according to the present invention has the greatest feature that accurate swaging can be performed under a light load by a revolving swaging roller. The greatest merit arises with a material with high rigidity, but on the other hand, in the processing of metal pipes with low buckling resistance such as light metal pipes and copper pipes, high quality processing can be achieved by appropriately setting the processing conditions. It is possible, and this can be said to be impossible with a conventional swaging machine.

FIG. 2 shows a side view of the swaging roller holder (2) of the present invention. In the figure, the mounting state of the flange portion of the swaging roller holder (2) to the driving flange (1) mounted at the end of the driving spindle is shown. The roller mounting pin (5) for positioning the swaging roller holder (2)
It is fixed with a set screw (6) so that the positional relationship during swaging can be maintained. Since the work material guiding hole (7) may be worn during repeated swaging operations, a separate adapter is attached to the housing end face so that the entire adapter is replaced when the hole is worn. By doing so, it is possible to contribute to maintaining the quality of the swaging part and improving the productivity.

FIG. 3 is a perspective view of the swaging roller holder (2) of the present invention. For the workpiece (8) held by the fixing chuck A (9),
The point that when the pressing is applied while rotating the swaging roller holder (2), the workpiece (8) revolves in a form inscribed in the three sets of swaging rollers (4) is the rotation of the present invention. It can be said that this is the biggest feature of the type swaging machine. Since the swaging process proceeds in the above-mentioned state, it has become possible to realize a high-quality swaging process under a light load.

An example of the quality in the swaging process of the present invention will be described based on measured values. <Example of processing by the old method / unit mm> Material thickness −0.055 −0.06 Thickness after processing +0.16, +0.17, +0.145
~ + 0.162, +0.17, 0.15 <Example of processing by new method / unit mm> Thickness of material −0.008 Thickness after processing +0.01, +0.02, +0.03
+0.05, +0.09 (Remarks) It can be determined that the increase in the thickness of the swaging portion is suppressed in the new method compared to the old method. The above is related to the relationship between the length of the material and the length of the product after swaging, and appears as an improvement in the yield in the new method with respect to the old method.

FIG. 4 shows a swaging roller of the present invention.
It is a perspective view which shows the arrangement | positioning relationship of the holder (2) and the fixing chuck A (9). In the rotary swaging machine according to the present invention, only one set of the fixing chuck A (9) is provided at a position immediately adjacent to the swaging roller holder (2), and the swaging roller holder (2) is provided.
In order to lubricate the swaging roller (4) during the swaging process, a small amount of oil is supplied, so a sealing cover is attached. Workpiece fixing chuck A (9) is equipped with fixing chuck opening / closing cylinder (12) and clamping cylinder (13), enabling quick attachment and detachment of workpiece and reliable holding. There is a simple configuration.

FIG. 5 is a perspective view showing an example of an old-type swaging machine. In the old press-fit type swaging machine, the swaging part is pressed against the solid-type swaging piece (14) and pushed with a strong pressing force, so a strong pressing force is applied to the workpiece. A firm holding method is required, and a fixing chuck B (16) for work pieces, a receiving piece (17), and an end block (18) are required. (17) is required. For this reason, it is necessary to change the setup every time the length of the workpiece is different, which actually lowers the efficiency.

The pressing force at the time of the swaging process is 8
Because it extends to ton, the rigidity of the machine body is required,
In the rotary swaging machine of the present invention, the pressing force at the time of swaging is sufficient to be 1 ton, so that the rigidity of the machine is greatly reduced, and the total weight of the conventional machine is from 5 tons to 0.1 ton.
It is greatly reduced to 2 tons, and the installation floor area is also 1000 mm × 2500 mm of the conventional machine 500 mm × 1350
mm, and at the same time, the casters can be mounted. Therefore, when the layout is changed, it is easy to cope with ease of movement and reduction of installation space.

[0016]

The effects obtained by implementing the present invention are as follows. (B) Significant savings in processing machine manufacturing costs. The cost savings of the processing machine obtained by implementing the present invention are as follows:
The pressing force of the hydraulic cylinder required for swaging is 1
85% of the manufacturing cost of the machine itself
We were able to achieve significant savings.

(B) The accuracy of the processed part is improved. In the present invention, because the rotary swaging processing method,
No burrs at the time of processing, and plastic working under light load improves finishing accuracy and stability of the insertion joint.

(C) The setup change time can be reduced. In the conventional swaging machine, the setup change is required according to the change in the length of the workpiece, but the rotary swaging machine of the present invention does not require the setup change, which contributes to the improvement of efficiency. become.

(D) Processing is completed in one pass regardless of the shape of the processed part. In a conventional swaging machine, one-pass machining is not sufficient depending on the shape of the machining part, and two-pass machining may be required. However, the rotary swaging machine of the present invention revolves. Since plastic deformation is promoted under light load in a shape that conforms to the surface shape of the swaging roller, processing can be completed with only one pass.

(E) The restrictions on the diameter, thickness and length of the workpiece are eliminated. In the conventional swaging machine, the size of the workpiece may be restricted, but in the rotary swaging machine of the present invention, these restrictions are eliminated and the applicable range is expanded.

(F) It is easy to respond to layout changes. The weight of the machine was reduced from 5 tons to 0.2 tons, the casters were provided on the machine body, and the occupied floor area was 1,000 x 2500 mm to 500 x 1350 m.
m, making it easy to respond to layout changes.

(G) Application to non-ferrous metal pipes has become possible. With conventional swaging machines, swaging of non-ferrous metal tubes with low buckling load was not possible, but the present invention is a rotary swaging method, so it can be applied to non-ferrous metal tubes. Became.

(H) The range of use of the swaging member has been expanded. The swaging process started from the pipe frame material of the vehicle seat has been expanded rapidly to the field including non-ferrous metals by the rotary swaging process.

[Brief description of the drawings]

FIG. 1 is a swaging roller showing an embodiment.
Front view of holder

FIG. 2 is a swaging roller showing an embodiment.
Side view of holder

FIG. 3 is a swaging roller showing an embodiment.
Perspective view of holder

FIG. 4 is a swaging roller showing an embodiment.
A perspective view showing an arrangement relationship between a holder and a fixing chuck.

FIG. 5 is a perspective view of a nest showing an example of a conventional swaging machine;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Drive flange provided at end of drive spindle 2 Swaging roller holder 3 Flange mounting screw 4 Swaging roller 5 Roller mounting pin 6 Set screw 7 Workpiece guiding hole 8 Workpiece 9 Fixing chuck A10 Fixing chuck receiving piece 11 Fixing chuck holding piece 12 Fixing chuck opening / closing cylinder 13 Fixing chuck pressing cylinder 14 Press-fit swaging frame 15 Swaging frame receiver 16 Fixing chuck B 17 Receiving frame 18 End block

Claims (2)

[Claims] 1. A swaging machine for a steel pipe or the like,
Instead of swaging by the press-fit swaging frame, three sets of swaging are provided on the end face of the drive flange (1) provided at the end of the drive spindle rotated by the drive motor.
A swaging roller holder (2) composed of a flanged housing in which rollers (4) are arranged in a planetary manner is attached, and a steel pipe or the like fixed by a work fixing fastener A (9) is connected to the planetary gear described above. The three sets of swaging rollers (4) arranged in a circle are guided so as to be inscribed in the center, and the entire drive spindle can be pushed and pulled by a predetermined stroke by a hydraulic cylinder or the like. Rotary swaging machine as a component 2. A swaging method in which said fixing chuck (9) is provided immediately adjacent to a swaging roller holder (2) so as to securely hold a steel pipe or the like of a workpiece. 2. The rotary swaging machine according to claim 1, wherein the swinging machine is configured to be able to reliably prevent the workpiece from being shaken due to the above and to maintain the machining accuracy.