A press-in nut auxiliary positioning tool and a press-in method

Abstract

The application discloses a kind of press-in nut auxiliary positioning tool and press-in method, including upper die, lower die and positioning block, upper die is connected with the slider of press, lower die is set on the placement platform of press, slider drives upper die to move up and down and cooperate with lower die, press-in operation is carried out to the nut placed in lower die, one side of positioning block is provided with positioning groove, and the positioning block in the positioning groove is provided with five press-in positioning holes and an installation positioning hole arranged in matrix, lower die is penetrated through positioning block from the other side of positioning block through installation positioning hole, positioning block and lower die are provided with installation fixing hole for fixed connection of the both by installation bolt;The present application increases positioning block based on existing upper die and lower die, the positioning of press-in nut is realized by positioning block, to prevent the offset of plate and press-in nut due to vibration during press-in process, to cause the problem of low press-in precision, affect product quality.

Description

Technical fields:

[0001] This invention relates to the field of riveting technology, and in particular to an auxiliary positioning fixture for press-fit nuts and a press-fitting method. Background technology:

[0002] Press-fit nuts are widely used. In the assembly of automotive battery trays, press-fit nuts are used on aluminum profiles. The press-fit nuts are fixed to the aluminum profiles using a press machine. However, the existing riveting method is to directly put the rivet nut into the lower mold, then place the sheet metal on the lower mold, and align the riveting parts marked on the sheet metal with the rivet nut. Finally, the pressure of the upper mold is used to rivet the sheet metal and the rivet nut together. However, during use, vibration or visual deviation by the user can cause the sheet metal to shift, resulting in low press-fit accuracy and affecting product quality. Summary of the Invention:

[0003] The technical problem to be solved by the present invention is to limit the position of the rivet nut by adding a positioning block to the existing upper and lower molds, thereby ensuring the rivet quality of the product.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution: an auxiliary positioning fixture for press-fit nuts, comprising an upper die, a lower die, and a positioning block. The upper die is connected to the slider of a press, and the lower die is set on the placement platform of the press. The slider drives the upper die to move up and down to cooperate with the lower die, performing a press-fit operation on the nut placed in the lower die. The positioning block is characterized in that: a positioning groove is provided on one side, and the positioning block within the positioning groove is provided with five press-fit positioning holes and one mounting positioning hole arranged in a matrix. The lower die passes through the positioning block from the other side through the mounting positioning hole. The positioning block and the lower die are provided with mounting fixing holes for fixing the two together by mounting bolts.

[0005] Furthermore, the mounting positioning hole is located on the outer middle of the five press-fit positioning holes.

[0006] Furthermore, the crimping positioning hole is a countersunk hole that allows the crimped nut to be inserted.

[0007] To solve the above-mentioned technical problems, another technical solution provided by the present invention is: a riveting method for assisted riveting of a riveting nut based on the above-mentioned positioning fixture, the steps of which are:

[0008] Step 1: Pre-machine rivet holes on the parts of the sheet metal to be riveted;

[0009] Step 2: Assemble the above positioning fixture;

[0010] Step 3: Place a rivet nut into the lower mold, place the plate on the positioning block, and make any one of the rivet holes on the plate fit onto the protruding step of the rivet nut;

[0011] Step 4: The upper mold moves downward under the action of the press slide to complete the fixing of a rivet nut to the plate.

[0012] Step 5: Repeat Step 3, and insert the rivet nut riveted to the plate into the press-fit positioning hole on the positioning block, then repeat Step 4;

[0013] Step 6: Repeat step 5 until all rivet holes are fitted with rivet nuts.

[0014] Furthermore, in step two, the assembly method of the positioning fixture is as follows: the upper mold is connected to the slider of the press, the lower mold is set on the placement platform of the press, the positioning block is fitted on the lower mold through the mounting positioning hole, so that the positioning groove on the positioning block faces upward, and the positioning block is fixed on the lower mold through the mounting bolt set in the mounting fixing hole.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This application adds a positioning block to the existing upper and lower molds to position the rivet nut, preventing the sheet metal and rivet nut from shifting due to vibration during the riveting process, which would otherwise result in low riveting accuracy and affect product quality.

[0017] 2. In this application, the positioning block is fitted onto the lower mold through the mounting positioning hole and the two are fixed by the mounting bolts to ensure the stability of the connection and prevent deviation of the riveting due to vibration or improper placement during the riveting process, which would affect the riveting quality.

[0018] 3. In this application, the press-fit positioning hole, the mounting positioning hole, and the mounting fixing hole are all set in the positioning groove. When the mounting bolts are used to fix and connect the profile to the lower mold and to position the press-fit nut, the mounting bolts and the press-fit nut can sink into the positioning groove, so that the profile can be placed stably on the positioning block, so that the profile is in a stable state and the shaking of the profile is reduced.

[0019] 4. In this application, the riveting positioning hole is a countersunk hole. The nut after riveting on the profile can be placed into the riveting positioning hole. The riveting positioning hole supports the riveting nut and limits its position. At the same time, the riveting nut placed in the riveting positioning hole can also support the profile and reduce the deformation of the profile during riveting due to the presence of the positioning groove.

[0020] 5. In this application, the distance between the mounting positioning holes and the riveting positioning holes is set according to the distance between the riveting positions on the profile. The mounting positioning holes are located on the middle outer side of the five riveting positioning holes, so that the riveting part is closer to the personnel, making it easier for the personnel to observe and place the profile. At the same time, it is convenient to replace the matching positioning block according to the distance between the riveting positions on the profile.

[0021] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached image description:

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only eight of the drawings in this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Figure 2 This is a schematic diagram of the structure used in this application.

[0025] Figure 3 This is a schematic diagram of the press-fit structure of this application.

[0026] Figure 4 This is a schematic diagram of the rivet holes on the sheet metal.

[0027] Figure 5 This is a schematic diagram of the riveting structure for hole A.

[0028] Figure 6 This is a schematic diagram of the B-hole press-fit structure.

[0029] Figure 7 This is a schematic diagram of the C-hole press-fit structure.

[0030] Figure 8 This is a schematic diagram of the D-hole press-fit structure.

[0031] In the diagram, 1-upper mold, 2-lower mold, 3-positioning block, 4-plate, 5-rivet hole, 6-press nut;

[0032] 31-Positioning groove, 32-Pressure riveting positioning hole, 33-Mounting positioning hole, 34-Mounting fixing hole. Detailed implementation method:

[0033] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0036] Example 1

[0037] like Figure 1-8 As shown, an auxiliary positioning fixture for press-fit nuts includes an upper die 1, a lower die 2, and a positioning block 3. The upper die 1 is connected to the slider of a press, and the lower die 2 is set on the placement platform of the press. The slider drives the upper die 1 to move up and down to cooperate with the lower die 2, performing a press-fit operation on the nut placed in the lower die 2. The positioning block 3 has a positioning groove 31 on one side, and five press-fit positioning holes 32 and one mounting positioning hole 33 arranged in a matrix on the positioning block 3 within the positioning groove 31. The lower die 2 passes through the positioning block 3 from the other side through the mounting positioning hole 33. The positioning block 3 and the lower die 2 are provided with a through-hole. The mounting and fixing holes 34 are used to fix the two together through the mounting and fixing bolts; the positioning block 3 is fitted onto the lower mold 2 through the mounting and positioning holes 33, and the two are fixed together by the mounting bolts to ensure the connection stability and prevent the riveting deviation caused by vibration or improper placement during the riveting process, which would affect the riveting quality; the riveting positioning holes 32, mounting and positioning holes 33 and mounting and fixing holes 34 are all set in the positioning groove 31. When the mounting bolts are used to fix the lower mold 2 and to position the riveting nut 6, the mounting bolts and the riveting nut 6 can sink into the positioning groove 31, so that the profile can be placed stably on the positioning block 3, so that the profile is in a stable state and the shaking of the profile is reduced.

[0038] The mounting positioning hole 33 is located on the outer middle of the five riveting positioning holes 32. The distance between the mounting positioning holes 33 and the riveting positioning holes 32 is set according to the distance between the riveting positions on the profile. The mounting positioning hole 33 is located on the outer middle of the five riveting positioning holes 32, which makes the riveting part closer to the personnel, making it easier for the personnel to observe and place the profile. At the same time, it is convenient to replace the matching positioning block 3 according to the distance between the riveting positions on the profile.

[0039] Example 2

[0040] like Figure 2 As shown, this embodiment is obtained by further describing the technical features such as the riveting positioning hole 32 based on the first embodiment. The other technical features are the same as those in the first embodiment, and the similarities will not be repeated here. The difference between this embodiment and the first embodiment is that the riveting positioning hole 32 is a countersunk hole that allows the riveted nut to be inserted.

[0041] In this embodiment, the riveting positioning hole 32 is a countersunk hole. The nut on the profile after riveting can be placed into the riveting positioning hole 32. The riveting positioning hole 32 supports the riveting nut 6 and limits its position. At the same time, the riveting nut 6 placed in the riveting positioning hole 32 can also support the profile and reduce the deformation of the profile during riveting due to the presence of the positioning groove 31.

[0042] The process of using the overall technical solution formed by the above embodiments forms another technical solution disclosed in this application, which is: an auxiliary riveting method for a rivet nut 6, the steps of which are:

[0043] Step 1: Pre-machine rivet holes 5 on the part of the plate 4 to be riveted;

[0044] Step 2: Assemble the above positioning fixture;

[0045] Step 3: Place a rivet nut into the lower mold 2, place the plate 4 on the positioning block 3, and make any one of the rivet holes 5 on the plate 4 fit onto the protruding step of the rivet nut;

[0046] Step 4: The upper mold 1 moves downward under the action of the press slide to complete the fixing of a rivet nut to the plate 4;

[0047] Step 5: Repeat step 3, and make the rivet nut riveted to the plate 4 extend into the press-fit positioning hole 32 on the positioning block 3, and repeat step 4.

[0048] Step 6: Repeat step 5 until all rivet holes 5 are riveted with rivet nuts.

[0049] Furthermore, in step two, the assembly method of the positioning fixture is as follows: the upper mold 1 is connected to the slider of the press, the lower mold 2 is placed on the placement platform of the press, the positioning block 3 is fitted onto the lower mold 2 through the mounting positioning hole 33, so that the positioning groove 31 on the positioning block 3 faces upward, and the positioning block 3 is fixed on the lower mold 2 through the mounting fixing hole 34 with the mounting bolt.

[0050] The specific operation process during riveting is as follows:

[0051] Place the rivet nut 6 into the lower die 2.

[0052] The aluminum profile (sheet 4) has pre-machined holes, such as... Figure 5 Use the round hole A to place it into the protruding step of the press-fit nut 6.

[0053] The press drives the upper mold 1 to press down, thus fixing the rivet nut 6.

[0054] Remove the aluminum profile (sheet 4), and repeatedly place the rivet nut 6 inside the lower mold 2. Place the rivet nut on hole A as shown in the image. Figure 6 The A-hole rivet nut 6 is positioned by the positioning block 3 (the rivet nut 6 extends into the rivet positioning hole 32). By adjusting the aluminum profile (plate 4), the B-hole is aligned with the rivet nut 6 inside the lower mold 2, and then the riveting is completed.

[0055] Remove the aluminum profile (sheet 4), and repeatedly place the rivet nuts 6 inside the lower mold 2. Place the rivet nuts on holes A and B as shown in the image. Figure 7 The A hole and the B hole are positioned by the positioning block 3 (the 6 press-fit nuts extend into the press-fit positioning hole 32), which ensures that the C hole is aligned with the 6 press-fit nuts inside the lower mold 2, and then the press-fit is completed.

[0056] Remove the aluminum profile (sheet 4), and repeatedly place the rivet nuts 6 inside the lower mold 2. Place the rivet nuts on holes A, B, and C as shown in the image. Figure 8 The A, B, and C holes are positioned by the positioning block 3 (the 6 press-fit nuts extend into the press-fit positioning hole 32), ensuring that the D hole is aligned with the 6 press-fit nuts inside the lower mold 2, and then the press-fit is completed.

[0057] Remove the aluminum profile (sheet 4) and complete the crimping of the four crimp nuts 6.

[0058] Pre-machined rivet holes 5 on the riveting area of ​​plate 4 improve the installation accuracy of the rivet nuts 6 and prevent the rivet nuts 6 from shifting position during the riveting process. Since there are four rivet nuts 6 on the aluminum profile (plate 4), positioning blocks 3 are designed, each with a mounting positioning hole 33, ensuring the installation accuracy of the positioning blocks 3. The five positioning holes for the rivet nuts 6 ensure the positioning accuracy of the rivet nuts 6. Furthermore, inspection is completed using a press-assisted positioning fixture, eliminating the need for dimensional measurement and saving labor.

[0059] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A riveting nut auxiliary positioning fixture, comprising an upper die, a lower die, and a positioning block, wherein the upper die is connected to a slide block of a press, and the lower die is disposed on a placement platform of the press; the slide block drives the upper die to move up and down to cooperate with the lower die, thereby performing a riveting operation on a nut placed in the lower die, characterized in that: The positioning block has a positioning groove on one side, and the positioning block in the positioning groove has five riveting positioning holes and one mounting positioning hole arranged in a matrix. The lower mold passes through the positioning block from the other side of the positioning block through the mounting positioning hole. The positioning block and the lower mold are provided with mounting fixing holes for fixing the two by mounting bolts. The mounting positioning hole is located on the outer middle of the five press-fit positioning holes; the press-fit positioning hole is a countersunk hole that allows the press-fitted nut to be inserted.

2. A riveting method assisted by a rivet nut, using the tooling described in claim 1, comprising the following steps: Step 1: Pre-machine rivet holes on the parts of the sheet metal to be riveted; Step 2: Assemble the above positioning fixture; Step 3: Place a rivet nut into the lower mold, place the plate on the positioning block, and make any one of the rivet holes on the plate fit onto the protruding step of the rivet nut; Step 4: The upper mold moves downward under the action of the press slide to complete the fixing of a rivet nut to the plate. Step 5: Repeat Step 3, and insert the rivet nut riveted to the plate into the press-fit positioning hole on the positioning block, then repeat Step 4; Step 6: Repeat step 5 until all rivet holes are fitted with rivet nuts.

3. The auxiliary riveting method for a rivet nut according to claim 2, characterized in that: In step two, the positioning fixture is assembled as follows: the upper mold is connected to the slider of the press, the lower mold is placed on the placement platform of the press, the positioning block is fitted onto the lower mold through the mounting positioning hole, so that the positioning groove on the positioning block faces upward, and the positioning block is fixed on the lower mold through the mounting bolt in the mounting fixing hole.

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