JP2007216273A - Caulking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caulking device to form a caulking part which does not cause leakage of fuel. <P>SOLUTION: The caulking device 300, which presses an outer cylinder 2 from its outer periphery and caulks the outer cylinder to a member 1 to be assembled, comprises a holding stand 11 to hold the outer cylinder 2, a first caulking means 500 to perform the first caulking step of caulking a plurality of points in the outer periphery toward the center direction of the outer cylinder, and a second caulking means 600 to perform the second caulking step of caulking the whole outer periphery toward the center direction of the outer cylinder, after the first caulking step is performed by the first caulking means 500. The caulking device 300 is characterized in that a formed part 13a formed in the first caulking step by the first caulking means 500 has a protrusion whose width W becomes narrower toward the center of the member to be assembled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a processing apparatus and a processing method for caulking metal.

  When assembling an outer cylinder having a fuel pump case function and a disc having a lid function disposed inside thereof, a method of caulking the outer cylinder is often used as a simple method. In this case, the problem is fuel leakage from the caulking part. This is mainly due to the fact that the circumferential seal portion for the uniformly plastically deformed disc is not formed in the outer cylinder.

  One reason for this is that when there is a radial gap between the disk and the outer cylinder, the disk is displaced in the radial direction when caulking the outer cylinder, and the coaxiality between the disk and the outer cylinder deteriorates. is there. In order to prevent the radial displacement of the disk, conventionally, as shown in FIG. 6, the outer cylinder 2 is first caulked (temporarily caulked) to plastically deform some parts of the outer cylinder to thereby change the disk 1 After temporarily fixing to the outer cylinder 2, the second caulking (formal caulking) was performed.

  Further, even when there is no radial gap between the disc 1 and the outer cylinder 2, the first caulking is performed to prevent the relative position in the axial direction between the disc and the outer cylinder from shifting.

  The first caulking forms a substantially rectangular recess 6 when viewed from the axial direction. However, in particular, when the disc is made of resin, the disc is likely to be damaged at the rectangular outer edge portion 6a of the rectangular recess, and fuel leakage may occur from the damaged portion.

  Incidentally, there is one disclosed in Patent Document 1 as the second caulking prior art.

JP 2002-202279 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a caulking device and a method for producing a caulking portion that does not cause fuel leakage.

The present invention provides a caulking device and a method described in the claims as means for solving the above-mentioned problems.
According to the invention described in claim 1, in the caulking device, the first caulking forming portion of the first caulking means is a convex portion whose convex portion width W becomes narrower toward the center of the disk. To do.

  By setting the shape of the convex portion of the first caulking forming portion to the above shape, the length (rate) stretched by caulking of the outer cylinder tip portion at the time of the first caulking becomes relatively smaller than before. For this reason, the to-be-assembled member which is a caulking body also becomes difficult to be damaged. Further, unlike the first caulking due to the point due to the punch or the like, the caulking portion is composed of two straight portions, so that the outer cylinder and the assembled member are firmly fixed.

  According to the invention described in claim 2, the caulking device is implemented in a state where the first caulking and the second caulking press the assembled member against the outer cylinder from above by the respective assembled member pressing means. It is characterized by that.

  According to the third aspect of the present invention, the caulking device includes driving means for driving the assembled member pressing means, and the assembled member pressing means is connected to the driving means via the elastic member. It is characterized by.

According to the invention of claim 4, the caulking device is configured such that the first assembled member pressing means abuts against the peripheral portion of the assembled member other than the first caulking forming portion and presses the assembled member. And a 2nd to-be-assembled member press means contact | abuts to the center part of an to-be-assembled member, and presses an to-be-assembled member, It is characterized by the above-mentioned.
According to the invention described in claim 5, the member to be assembled is a disc having a lid function.

  According to the invention described in claim 6, the caulking method pressurizes from the outer peripheral portion of the outer cylinder, caulks the outer cylinder against a disc having an inner lid function, and encloses the caulking part inside. In the caulking method for sealing the liquid, the first caulking is performed, and then the second caulking is performed. The first caulking portion is provided at at least three locations on the outer periphery, and the first caulking portion is seen from the axial direction. It is a substantially V-shaped recessed part, and it is a recessed part which the said recessed part width becomes narrow toward the disc center.

  By setting the shape of the concave portion of the first caulking portion to the above shape, the length (rate) stretched by caulking of the outer cylinder tip portion at the time of the first caulking becomes relatively smaller than before. For this reason, the disk which is a caulking body also becomes difficult to be damaged. In addition, the first caulking portion is substantially V-shaped, and unlike the first caulking due to a punch or the like, the caulking portion is composed of two straight portions, so that the outer cylinder and the disc are firmly attached. Fixed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a first caulking means according to the present invention. FIG. 2 is a sectional view of the second caulking means according to the present invention. FIG. 3 is a plan view (a) and a sectional view (b) of a first caulking portion manufactured by the apparatus according to the present invention. The plan view (a) is a view of the cross-sectional view (b) viewed from the A direction. (The same applies to FIGS. 5 and 6.) FIG. 4 is a perspective view of the first caulking portion of FIG. FIG. 5 is a plan view (a) and a sectional view (b) of a second caulking portion manufactured by the apparatus according to the present invention. In addition, the form of the 2nd crimping part manufactured with the conventional apparatus is also the same as FIG.

  In FIG. 1, reference numeral 500 denotes first caulking means, 1 denotes a member to be assembled, a resin disk having a lid function, 2 an iron outer cylinder, 11 a holding base for holding the outer cylinder 2, Reference numeral 12 denotes first disc pressing means, 13 denotes a first caulking tool, 13a denotes a first caulking forming portion, 14 denotes an elastic member, and 15 denotes driving means. In FIG. 2, 600 is the second caulking means, 11 is a holding base for holding the outer cylinder 2, 22 is the second disc pressing means, 23 is the second caulking tool, 23a is the second caulking forming portion, and 14 is An elastic member 15 is a driving means.

  The caulking device 300 according to the present invention includes a first caulking means 500, a second caulking means 600, a holding base 11, and a base 9. For the sake of convenience, the first caulking means 500 and the second caulking means 600 are shown in separate views in FIGS. 1 and 2, but are a set of processing apparatuses having a common base 9.

  The first caulking means 500 mainly includes a first disc pressing means 12, a first caulking tool 13, an elastic member 14, and a driving means 15. The first disk pressing means 12 is slidably inserted into the central cylinder portion of the first caulking tool 13 and is connected to the driving means 15 via the elastic member 14. The elastic member 14 is usually a coil spring, and the first disk pressing means 12 comes into contact with the disk 1 earlier than the first caulking tool 13 to press the disk 1 against the outer cylinder 2 during caulking. The main role is to make this possible. A first caulking forming portion 13 a is disposed at the tip of the first caulking tool 13.

  The first disc pressing means 12 presses the disc by contacting the peripheral edge of the disc other than the three first caulking forming portions 13a at the distal end portion 12a. The drive means 15 is a pneumatic actuator using factory air. Of course, a hydraulic or electric actuator may be used. The driving means 15 has an operating portion 15a that moves up and down by pneumatic pressure.

  On the other hand, the second caulking means 600 mainly includes a second disc pressing means 22, a second caulking tool 23, an elastic member 14, and a driving means 15. The second caulking means 600 has substantially the same configuration as the first caulking means 500, but only the second disc pressing means 22 and the second caulking tool 23 are different from the first caulking means 500. (Of course, the caulking forming portion 23a is also different.) The second disc pressing means 22 abuts against the central portion of the disc 1 at the tip 22a and presses the disc. This is because a caulking formation portion 23 a is disposed on the entire periphery of the peripheral portion of the disc 1.

  Here, the workpiece will be described. 3 to 5, 1 is a resin disk having a lid function, and 1 a is a caulked portion of the disk 1 and has an R shape. Of course, the disc 1 can be made of metal such as aluminum. 2 is an iron outer cylinder, 2b is an upper edge portion of the outer cylinder 2, 3 is an inside of the outer cylinder 2, 4 is a first caulking portion, and 100 is an outer cylinder 2 and a disc 1 having a lid function. It is an assembly that has been crimped by one, and is an internal part (not shown) such as a pump element on its inner side 3 and is finally a part that constitutes a fuel pump.

  Next, a method for assembling the disc 1 and the outer cylinder 2 will be described. Of course, the first state of the outer cylinder 2 does not include the first caulking portion 4 in FIG. 3, and the upper edge of the outer cylinder has an upright cylindrical shape like 2b. The disc 1 is inserted from above the outer cylinder 2 along the inner side surface 2 c of the outer cylinder 2 to a position where it contacts the shoulder 2 a of the outer cylinder 2. There is a slight gap between the outer peripheral portion of the disk 1 and the inner side surface 2c of the outer cylinder 2.

  Next, as shown in FIG. 1, the assembly 100 of the disc 1 and the outer cylinder 2 is mounted on the holding base 11 of the first caulking means 500. The drive means 15 is driven, and the first disk pressing means 12 connected to the drive means 15 via the elastic member 14 is moved downward from above. Then, the first disc pressing means 12 presses the disc 1 by coming into contact with the peripheral portion of the disc other than the first caulking forming portion 13 a of the first caulking tool 13. This is because pressing the disc 1 in the vicinity of the caulking portion 4 of the outer cylinder 2 prevents the disc 1 from being displaced during caulking. Thus, the first disk pressing means 12 presses the disk 1 against the outer cylinder 2 in the axial direction from above to below.

  Subsequently, the first caulking is performed at three locations that are substantially equally divided into three in the circumferential direction of the outer cylinder 2. The first caulking tool 13 directly connected to the driving means 15 is continuously moved after the first disk pressing means 12 contacts the disk 1. As a result, the three locations divided into approximately three equal parts in the circumferential direction of the outer cylinder 2 which is the upper edge of the outer cylinder 2 are simultaneously inwardly deformed from the outer peripheral side of the outer cylinder 2 (the center of the outer cylinder 2) Bend in the direction). Incidentally, the elastic member 14 guarantees a series of continuous movement processes of the first disk pressing means 12 and the first caulking tool 13 or reduces the impact during caulking to prevent the caulking means 500 and the assembly 100 from being damaged. Is to do.

  The first caulking portion 4 is formed with a recess as shown by 4a in FIG. The concave portion is formed by transferring the first caulking forming portion 13 a of the first caulking tool 13. That is, the shape of the first caulking forming portion 13a is a convex shape in which the shape of the first caulking concave portion 4a of the outer cylinder 2 is completely inverted as in the relationship between the molding die (female) and the molded product (male). .

  The concave portion 4a is a concave portion having a concave portion width W that becomes narrower toward the center of the disc, and has a substantially V shape when viewed from the axial direction. (That is, the first caulking forming portion 13a of the first caulking tool 13 is a convex portion that is a substantially V-shaped convex portion when viewed from the axial direction and has a convex portion width W that decreases toward the center of the disk. The center of the disk 1 and the outer cylinder 2 are made to substantially coincide with each other by simultaneously bending the three portions of the outer cylinder 2 which are the upper edge part of the outer cylinder 2 into three parts in the circumferential direction, These can be fixed.

  Subsequently, together with the assembly 100 in which the first caulking has been completed, the holding table 11 is moved laterally to a position directly below the second caulking means 600 by a conveying means (not shown). At this time, the holding table 11 serves as a transfer table. Of course, the assembly 100 in which the first caulking has been completed may be transferred directly below the second caulking means 600 by automatic conveyance using a robot.

  As shown in FIG. 2, the assembly 100 of the disc 1 and the outer cylinder 2 for which the first caulking is completed is arranged and fixed together with the holding base 11 at a position directly below the second caulking means 600. Next, the drive means 15 is driven, and the second disk pressing means 22 connected to the drive means 15 via the elastic member 14 is moved downward from above. The second disk pressing means 22 contacts the center of the disk and presses the disk 1. This is to prevent the disc 1 from being displaced during caulking and to prevent the second caulking portion (the entire circumference of the upper edge of the outer cylinder 2) and the second disc pressing means 22 from interfering with each other. Thus, the disk 1 is pressed against the outer cylinder 2 in the axial direction from above by the second disk pressing means 22.

  Then, the 2nd crimping which caulks all the upper edge outer peripheral parts of the outer cylinder 2 toward the center direction of an outer cylinder is implemented. The second caulking tool 23 directly connected to the driving means 15 is continuously moved after the second disk pressing means 22 comes into contact with the disk 1. As a result, the entire circumference of the upper edge portion of the outer cylinder 2 is bent inward (toward the center of the outer cylinder 2) while being plastically deformed from the outer peripheral side of the outer cylinder 2. Incidentally, the elastic member 14 guarantees a series of continuous movement processes of the second disc pressing means 22 and the second caulking tool 23, or reduces the impact during caulking to prevent the caulking means 600 and the assembly 100 from being damaged. Is to do.

By this second caulking, the upper edge 2b of the outer cylinder 2 is covered along the R shape on the surface of the caulking part 1a having an R shape, and the sealing function part 5 is formed for the fuel inside the outer cylinder 2. Will be.
With the above-described caulking device and caulking method, an assembly 100 with caulking that does not cause fuel leakage is provided.

It is sectional drawing of the 1st crimping means which concerns on this invention. It is sectional drawing of the 2nd crimping means which concerns on this invention. It is the top view (a) and sectional drawing (b) of the 1st crimping part manufactured with the apparatus which concerns on this invention. It is a perspective view of the 1st crimping part of FIG. It is the top view (a) and sectional drawing (b) of the 2nd crimping part manufactured by the apparatus which concerns on this invention, or the conventional apparatus. It is the top view (a) and sectional drawing (b) of the 1st crimping part manufactured with the conventional apparatus.

Explanation of symbols

100 Assemblies having a first caulking portion manufactured by an apparatus according to the present invention 200 Assemblies having a first caulking portion manufactured by a conventional apparatus

Claims (6)

In the caulking device (300) for pressurizing the end of the outer cylinder (2) from the outer peripheral portion and caulking the outer cylinder against the assembled member (1) disposed inside the outer cylinder,
A holding base (11) for holding the outer cylinder (2);
First caulking means (500) for carrying out first caulking of the outer peripheral portion at a plurality of locations in the center direction of the outer cylinder;
Second caulking means (600) for performing second caulking after caulking all of the outer peripheral portion in the center direction of the outer cylinder after performing the first caulking by the first caulking means (500);
The first caulking formation portion (13a) of the first caulking means (500) includes a convex portion that comes into contact with the end portion of the outer cylinder (2) during the first caulking.
The caulking device (300), wherein the convex portion has a width (W) that decreases toward the center of the member (1) to be assembled. The first caulking means includes first assembled member pressing means (12), and the second caulking means includes second assembled member pressing means (22), respectively.
The first caulking and the second caulking are performed in a state where the assembled member pressing means (12, 22) presses the assembled member (1) against the outer cylinder (2) from above. The caulking device (300) according to claim 1, wherein the caulking device (300) is implemented. Drive means (15, 25) for driving the assembled member pressing means (12, 22),
The caulking device (300) according to claim 2, wherein the assembled member pressing means is connected to the driving means via an elastic member (14, 24).   The first assembled member pressing means abuts against a peripheral portion of the assembled member other than the first caulking formation portion (13a) to press the assembled member, and the second assembled member. The caulking device (300) according to claim 2 or 3, wherein the pressing means presses the member to be assembled in contact with a central portion of the member to be assembled.   The caulking device according to any one of claims 1 to 4, wherein the member to be assembled is a disc having a lid function. In the caulking method of applying pressure from the outer peripheral part of the outer cylinder (2), caulking the outer cylinder against the disc (1) having an inner lid function, and sealing the liquid enclosed in the caulking part;
Carry out the first caulking (4), then carry out the second caulking (5),
The first caulking portion is provided in at least three places on the outer peripheral portion,
Furthermore, the first caulking portion is a concave portion (4a) that is substantially V-shaped when viewed from the axial direction, and is a concave portion that has a concave portion width (W) that decreases toward the center of the disk. Method.

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