JPH08117895A - Manufacturing joint part between inserting part and tubular part using edge bent part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reliable fixation of an insert part and a tubular part in the method for manufacturing a junction between both parts by using a edge bending part. SOLUTION: The tubular part 10 is covered and inserted with a tubular tool part 36 having an opening 38 from the other end part. The dimension of cross section of the opening 38 of the tool part 36 is selected so as to be smaller than that in the region 30 of the tubular part 10 having an enlarged outer cross section and, at least, to be the same as the outer cross section of the other tubular part 10. Then, relative motion between the tool part 36 and the tubular part 10 is afforded in a longitudinal direction of axis 11 and, thereby, the tool part 36 is moved beyond the region 30 of the tubular 10 having the enlarged outer cross section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is based on the preamble of claim 1 and relates to a method for producing a joint between an insertion part and a tubular part by means of an edge bend.

[0002]

2. Description of the Related Art Such a method is known, for example, from German Patent DE 4013032. In the case of this method, the insertion part is formed as a cover,
The cover is inserted from the end of a tubular part formed as a casing. The cover can be brought into contact with the stop in the direction of the longitudinal axis of the casing to ensure a correct positioning in the direction of the longitudinal axis. The edges of the casing, which project beyond the cover in the direction of the longitudinal axis, are then bent radially inwardly to the longitudinal axis of the casing under plastic deformation, whereby the edges are covered. Through the outer edge of the cover and abut the cover in the direction of the longitudinal axis. The cover is then fixedly fixed in the direction of the longitudinal axis between the stopper and the curved edge of the casing. When the edges of the casing are bent, the casing is compressed in the direction of its longitudinal axis and, after the bending, is slightly elastically expanded again. As a result, the holding force of the curved edge portion is reduced, and there is a possibility that it may become zero in an unfavorable state. In other words, in the known connection between the cover and the casing by means of the edging, it is not guaranteed that the cover is firmly fixed in the casing.

[0003]

On the other hand, the method of the present invention having the features of claim 1 for manufacturing the joint between the insertion portion and the tubular portion by using the hem bend produces the rim bend. When a ring-shaped tool part is moved through a region of the tubular part with an enlarged outer cross-section in this state, a tensile force is generated in the tubular part, which is, therefore, generated after the production of the helix. The return spring action of the tubular part has the advantage that the holding force on the insert part is further increased and thus the secure fixing of the insert part within the tubular part is achieved.

Claims 2 and below describe further advantageous methods of the invention.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in the drawings,
Next, this will be described in detail.

The device illustrated in FIGS. 1 and 2 has a tubular portion 10 and an insertion portion 12 secured to the portion 10. This device is a fuel transfer device for supplying fuel to an internal combustion engine of an automobile. The tubular part 10 is a casing, and the insert part 12 is a pump part which is inserted into the casing 10 from its end face. Casing 10
An electric drive motor (not shown) is received inside the pump portion 12. The pump part 12 is embodied as a flow pump part and has an impeller 14, which is in the direction of the longitudinal axis of the casing 10 a pump chamber 18 bounded by two wall parts 15 and 16. It is located inside. Wall parts 15 and 16
Has one ring-shaped discharge passages 19 and 20 on the end faces facing the impeller 14, respectively.
0 is arranged on the same diameter as the diameter of the blade of the impeller 14. A casing 10 between the wall parts 15 and 16
There is a gap in the direction of the longitudinal axis of the impeller 1
4 is adapted to be received in the pump chamber 18 with a certain axial play. The inner wall part 15 has a cylindrical additional part 22 which limits the pump chamber 18 in the radial direction with respect to the longitudinal axis 11, the outer wall part 16 abutting on the end face of the additional part 22. ing. Casing 10
Has a larger diameter in its end region where the pump portion 12 is located than in the other regions, so that at the transition from the larger diameter to the smaller diameter, the longitudinal axis 11 of the casing 10 is A step 24 which is arranged radially with respect to the end of the casing 10 and faces towards the end
Can be formed. This step 24 forms a stopper against which the pump part 12 abuts via the inner wall 15 in the direction of the longitudinal axis 11.
The axial stop for the pump part 12 can be formed by a structural part which is separately arranged in the casing 10.

The casing 10 is circular in cross-section and at one end into which the pump part 12 is inserted has a larger cross-section than the other regions, in particular a region 30 with a larger diameter. have. Casing 10
The outer diameter in the region 30 is designated by D1 and the diameter of the casing 10 in the other regions connected to the region 30 is designated by D2.
The region 30 extends over the entire outer circumference of the casing 10 and forms, as it were, a ring, in which case the diameter of the casing 10 distributed over the outer circumference of the casing 10 is arranged. It is also possible to provide a large number of protrusions protruding outward beyond D2. The casing 10 has an outwardly projecting thick wall 32 in a region 30 for forming an enlarged outer diameter, the thick wall 3
The diameter D1 of 2 increases towards the end of the casing 10. At that time, the diameter D1 of the thick portion 32 is, for example, as shown in FIG.
3 is enlarged conically as shown in FIG. 3 or by a rounded curve as shown in FIG. The casing 10 is made of a plastically deformable material, in particular metal, and is manufactured, for example, by deep drawing. In that case, the casing 10 is first formed in the shape of a cup, as shown in FIG. 4, and is provided with a bottom 34 at its end into which the pump part 12 is inserted. The casing 10 for forming the thick portion 32
Is compressed by the bottom 34 at its end after deep drawing, i.e. in the direction of its longitudinal axis 11.
As a result, the wall portion of the casing 10 is plastically deformed and pressed outward. The bottom 34 is then removed as marked by the dashed line in FIG. The result is an open tubular section at both ends. A variant of the casing 10 is shown in FIG. 5, in which the casing 10 is constructed in substantially the same way as already described, and further in a substantially longitudinal direction from its end where the pump part 12 is inserted. It has one or many slits 35 extending in the direction of the axis 11. The slit 35 has a thick portion 32 and a casing 10 having a large diameter D2.
Up to the region 30 of.

FIG. 1 shows the casing 10 and the pump portion 12 inserted into the casing 10 before the pump portion 12 is fixed. A ring-shaped tool portion 36 is fitted on the casing 10 from the end opposite to the thick portion 32, the tool portion 36 has an opening 38, and the diameter D3 of the opening 38 is It is only slightly larger than the diameter D2 of the casing 10 other than the flesh 32, so that the tool part 36 can move on the casing 10 without being tightened. The tool part 36 is fixedly arranged as part of the device, in which case the casing 10 is
The opening 38 is inserted in the direction of the arrow 39 in FIGS. 1 and 2, or the casing 10 is stretched in one device, and the tool part 36 is attached to the casing 10 and the arrow in FIGS. It is designed to be fitted in the direction of 40. The opening 38 of the tool portion 36 is rounded by expanding from the diameter D3 at its edge facing the thickened portion 32, while as shown in FIG. 6, for example from the diameter D3. The diameter may be conically expanded. The pump part 12 is held by a restraining holder 41, which is engaged with the outer wall part 16 thereof, so that the inner wall part 15 of the pump part 12 can abut on the step part 24.
Subsequently, relative movement in the direction of the longitudinal axis 11 is generated between the casing 10 and the tool part 36, so that the casing 10 can move relative to the stationary tool part 36, or the tool Allow the portion 36 to move relative to the stationary casing 10. In that case, the tool portion 36 comes to slide on the thick portion 32,
This sliding movement is facilitated by the rounded or chamfered edge of the opening 38 of the tool 36 or the chamfered or rounded bevel of the thickened portion 32. The thickened portion 32 is then plastically deformed and pressed radially inwardly with respect to the longitudinal axis 11 as shown in FIG. It comes to engage with the edge part from above. The thickened portion 32, which is further pressed inward, has the outer wall portion 1 in the direction of the longitudinal axis 11.
6 to allow the pump portion 12 to be retained in the direction of the longitudinal axis 11 between the step 24 and the thickened portion 32. Due to the slits 35 shown in FIG. 5 of the variant of the casing 10, it is possible to reduce the compressive action of the casing 10 in the circumferential direction and to move the tool part 36 through the thickened part 32. You will be able to use less power. The casing 10 extends while the tool portion 36 is moved over the thickened portion 32. That is, a tensile force for elastically expanding the casing 10 acts on the casing 10 in the direction of the longitudinal axis 11. After the thickened portion 32 has been pressed inward and the tool portion 36 has moved past the thickened portion 32 outward, the casing 10 will partially regain its original shape. That is, the casing 10 is shortened again. At that time, the force holding the pump portion 12 against the step portion 24 by the thick portion 32 is further strengthened by the restoration of the casing 10, and as a result, the reliable holding of the pump portion 12 in the casing 10 is achieved. Will be done. Furthermore, the casing 10 has a tool part 3 at its end where the pump part 12 is arranged.
6 has an outer diameter that is substantially equal to the diameter D3 of the opening 38 and slightly larger than the diameter D2 of the other regions.

FIG. 7 shows a variant of the casing 110, in which case a region 13 with an enlarged outer diameter is provided.
The edge 132 of the casing 110 is folded outwards at its end where the pump portion 112 is inserted to form a zero, and is wound about half a turn. The wrapped edge 132 similarly forms a thickened portion that projects outwardly, but the thickened portion is not solid. In this case, when the wound edge portion 132 and the opening 138 of the ring-shaped tool portion 136 are adjusted up and down, and the tool portion 136 moves beyond the edge portion 132, the edge portion 132 moves radially inward. It is pressed toward one side and is not rewound in the direction of the longitudinal axis 111 of the casing 110. This action has the effect of
2 and / or at the edge of the opening 138 of the tool portion 136,
This is accomplished by rounded or beveled curves. The upper surface of the opening 138 of the tool 136 and / or the upper surface of the rolled-up edge 132 is additionally coated with a sliding medium, which ensures that there is only a slight friction between these two parts. There is. FIG. 8 shows a variation of the casing 110. In this example, the edge portion 132 of the casing 110 is bent inward and wound. However, the casing 110 is then widened in its inner cross section in the region of the edge 132 so that the pump part 112 can be inserted and a region 130 is formed with an enlarged outer cross section. It's getting better.

A casing 110 based on FIGS. 7 and 8 is also provided.
In the case of the above configuration, as in the case of the configuration of FIG. 5, at least one slit is provided in the region 130.

The pump parts 12, 112 and the casing 1
The method described here for producing a connection with 0,110 is not limited to casings of circular cross section, but rather can be used for casings with any cross sectional shape. The casing then has an outer cross-section at its end where the pump part is inserted, which is generally larger than the other areas. The ring-shaped tool portion has an opening with a cross section that is somewhat smaller than the enlarged outer cross section of the casing and somewhat larger than the outer cross sections of the other casings. When the tool part is moved over an area of the casing with an enlarged cross section, this area is plastically deformed and pressed radially inward. Similarly, the method is not limited to being used in the fuel delivery device described above, but is adaptable for any use case, in this case in the tubular part, the insert part or the cover part. Can be fixed by the edge bend.

[Brief description of drawings]

FIG. 1 is a view of an insertion portion and a tubular portion in a first phase when manufacturing an edge bending joint using a tool portion.

FIG. 2 is a view of an insertion portion and a tubular portion in a second phase when manufacturing an edge bending joint.

FIG. 3 is a diagram of a variation of the tubular portion of FIG.

FIG. 4 is a diagram before the completion of the tubular portion.

FIG. 5 is a view of another variation of the tubular portion.

FIG. 6 is a diagram of a variation of a ring-shaped tool for making an edge bend joint.

FIG. 7 is a view of another configuration of the tubular portion.

8 is a diagram of a variation of the tubular portion of FIG. 7.

[Explanation of symbols]

 10 Tubular part 11 Longitudinal axis 12 Insertion part 14 Impeller 15 and 16 Wall part 18 Pump chamber 19 and 20 Discharge passage 22 Addition part 24 Step part 30 Region 32 Thick part 34 Bottom part 35 Slit 36 Tool part 38 Opening 39, 40 Arrow 41 retaining holder 110 casing 111 longitudinal axis 112 pump part 130 region 132 edge 136 tool part 138 opening

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Claims (12)

[Claims] 1. An insertion portion (12; 11) using a hem bend.
A method for producing a joint between a tubular part (10; 110) and a tubular part (10; 110), comprising inserting the insertion part (12; 112) into the tubular part (10; 110) from one end. Abutment against the stopper (24) in the direction of the longitudinal axis (11; 111) of the (10; 110) and the tubular portion (1
0; 110) by projecting the protruding edge (30; 130) radially inwardly with respect to the longitudinal axis (11; 111) and above the insert (12; 112). Insert the insertion portion (12; 112) into the longitudinal axis (1
In the method of immovably fixing between the stopper (24) and the curled edge (30; 130) in the direction of 1; 111), the tubular portion (1) into which the insertion portion (12; 112) is inserted.
0; 110) at one end of the tubular portion (1; 0; 110) over at least one portion of its perimeter and with an enlarged outer cross section than the other regions.
0; 110) and over the tubular portion (10; 110) from the other end, a tubular tool portion (36) with an opening (38) is fitted, the opening (36) of the tool portion (36). Three
8) is smaller than the area (30; 130) of the tubular section (10; 110) with an enlarged outer cross section and at least the outer cross section of the other tubular section (10; 110) And the longitudinal axis (11; 1) between the tool portion (36) and the tubular portion (10; 110).
11) in the direction of a relative movement, thereby causing the tool part (36) to have a tubular part (1) with an enlarged outer cross section.
0; 110) beyond the region (30; 130), and this region (30; 130) is subject to plastic deformation, radially inwardly with respect to the longitudinal axis (11; 111). A method for producing a joint between an insertion portion and a tubular portion by using an edge bending portion, which comprises pressing. 2. The tool part (36) is provided in the region (30; 13) of the tubular part (10; 110) with an enlarged outer cross section.
0) while exercising beyond 0) insert (12; 11
2), using the holding body (41), the stopper (24)
It holds in the state which contact | abutted to the said, 1 characterized by the above-mentioned.
The described method. 3. A tubular part (10; 110) is immovably fixed in the device and a tool part (36) is provided on the tubular part (10; 11).
Method according to claim 1 or 2, characterized in that it is moved relative to 0). 4. Method according to claim 1, characterized in that the tool part (36) is arranged immovably and the tubular part (10; 110) is moved relative to the tool part (36). . 5. A region (3) with an enlarged outer cross section.
0) to form a thickened portion (3) on the tubular portion (10).
Method according to any one of claims 1 to 4, characterized in that 2) is provided. 6. A method according to claim 5, characterized in that the thickened portion (32) is formed by upsetting the tubular portion (10). 7. A region (13) with an enlarged outer cross section.
Method according to any one of claims 1 to 4, characterized in that the tubular portion (110) is bent outwards at its edge (132) to form 0). 8. A tubular portion (110) is folded inward at its edges and widened to form a region (130) with an enlarged outer cross section. And any one of claims 1 to 4
The method described in the section. 9. Method according to claim 7 or 8, characterized in that the folded edge (132) of the tubular part (110) is rolled up. 10. A region (30; 1) of enlarged outer cross section.
10. Outer cross-section of the tubular portion (10; 110) in 30) is increased towards the end of the tubular portion (10; 110). the method of. 11. An opening (38) in the tool portion (36),
Tubular section (10; 110) with enlarged outer cross section
Area (30; 130) of the tool part (3
Method according to any one of claims 1 to 10, characterized in that the width is widened towards the edge of 6). 12. In the region (30) with at least an enlarged outer cross section, at least one slit (35) extending substantially in the direction of the longitudinal axis (11) of the tubular portion (10) is tubular. Method according to any one of claims 1 to 10, characterized in that it is provided in part (10).