Test fixture for riveting performance of rivet

Abstract

The utility model discloses a test fixture for the riveting performance of a rivet, and the test fixture comprises a pressing block which is provided with a supporting leg which is used for limiting the position of the pressing block. A limiting block is arranged on the ejector rod; the riveting plate is provided with a bearing hole, a moving space, a first loading groove and a limiting step, and the limiting step is used for limiting the position of the pressing block; a second loading groove and a through hole are formed in the base; and screws. The pressing block is completely arranged in the loading groove, the loading space is used for containing the rivet, the rivet exceeding the loading space is upset by the pressing block to generate an upset head, the upset head is limited by the gap, and therefore it is guaranteed that the size of the upset head meets the test standard. The pressing block is withdrawn from the clamp, then the whole clamp is turned over, the pressing block is arranged in the second loading groove, at the moment, a gap does not need to be formed between the pressing block and the second loading groove, the end, away from the supporting foot, of the pressing block needs to be inserted into the second loading groove, and the end, away from the base, of the ejector rod ejects the rivet out of the loading space.

Description

Technical Field

[0001] The utility model relates to the field of test fixtures, in particular to a test fixture for testing the riveting performance of rivets. Background Art

[0002] The mechanical properties of metal materials are important reference indicators for the selection of materials for aviation aircraft. The riveting performance of solid rivets in metal materials is also one of its important performance indicators. The accuracy and timeliness of testing performance are key factors affecting product quality and production efficiency.

[0003] At present, the fixtures used to test the riveting performance of rivets on the market need to be disassembled to remove the rivets after each test. In addition, users need to constantly observe and measure the size of the rivet's head during the test. These situations seriously affect the accuracy and timeliness of measuring the riveting performance of rivets. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a rivet riveting performance test fixture, which can constrain the size of the rivet head to ensure that the size of the head meets the test standard.

[0005] According to an embodiment of the present invention, a rivet riveting fixture includes a pressure block, a push rod and a rivet plate, a receiving hole is provided on the rivet plate, the push rod is slidably arranged in the receiving hole, a loading space is defined between the push rod and the receiving hole, and the loading space is used to load rivets, a first loading slot is provided on the rivet plate, the pressure block is detachably arranged in the first loading slot, the pressure block slides to fit the first loading slot, a gap is defined between the pressure block and the bottom of the first loading slot, and the gap is used to accommodate a heading, and the heading is obtained by squeezing and deforming one end of the rivet after the rivet is upset.

[0006] A rivet riveting performance fixture according to an embodiment of the present invention has at least the following beneficial effects: the pressure block is detachably arranged on the riveting plate, and the rivet is upset by the pressure block so that the rivet generates a upset head; the pressure block and the bottom of the first loading slot define a gap, and the gap is used to limit the thickness of the upset head to ensure that the thickness of the upset head can meet the test requirements. There is no need for the tester to observe and measure the size of the upset head again during the test. On the premise that the upset head meets the required size, it is convenient for the tester to conduct an evaluative observation on the status of the pier head.

[0007] According to some embodiments of the present invention, a limiting step is provided in the first loading groove, and the limiting step is used to block the pressure block. The pressure block and the bottom of the first loading groove define the gap, and the gap is used to limit the thickness of the pier head. The limiting step is integrated with the first loading groove, and the limiting step has a large force-bearing area and is not easily deformed when subjected to the pressure of the pressure block.

[0008] According to some embodiments of the present invention, a support foot is provided at one end of the pressing block close to the first loading slot, and the support foot abuts the bottom of the first loading slot. The pressing block defines the gap through the support foot and the bottom of the first loading slot, and the support foot and the pressing block are formed integrally. When the pressing block is used, the crimping surface of the pressing block can be distinguished according to the support foot, which has an anti-foolproof effect.

[0009] According to some embodiments of the present invention, a base is further included, which is connected to an end of the riveted plate away from the first loading slot, and a movable space is set in the riveted plate. A limiting block is set on the push rod, and the limiting block is slidably set in the movable space. The base is used to block the limiting block. The base is set so that the push rod can support the limiting block while sliding, which facilitates the overall transfer of the clamp.

[0010] According to some embodiments of the present invention, a second loading slot is provided at one end of the base away from the limit block, and the second loading slot is used to accommodate the pressure block. The end of the push rod away from the first loading slot protrudes to the second loading slot. The second loading slot is provided so that the pressure block has an installation space. After the test of upsetting the rivet, the pressure block is reversely loaded into the second loading slot. The push rod can be pushed by pushing the pressure block, so that the push rod can push out the rivet after upsetting, eliminating the trouble of hitting the push rod with a hammer in the past, and reducing the safety risk of hitting the hand with a hammer.

[0011] According to some embodiments of the present invention, the riveting plate is provided with a plurality of first loading slots, and the receiving hole, the push rod, the second loading slot and the movable space are all arranged in a one-to-one correspondence with the first loading slots. Providing a plurality of the first loading slots can achieve one-time upsetting of multiple rivets, thereby improving the test efficiency.

[0012] According to some embodiments of the present invention, a through hole is provided in the center of the second loading slot, and the end of the push rod away from the first loading slot is slidably connected to the through hole. The through hole is provided in the center of the second loading slot to prevent the push rod from being deformed due to uneven force, thereby affecting the test results.

[0013] According to some embodiments of the present invention, the riveted plate is threadedly connected to the base, and the threaded connection makes it easy to assemble and disassemble the riveted plate and the base.

[0014] According to some embodiments of the present invention, the base and the riveted plate are connected by screws, and the screws are cross screws or hexagon socket screws.

[0015] According to some embodiments of the present invention, the base and the riveted plate are both configured as quadrangular prisms, and the four edges of the base and the riveted plate are both configured as rounded corners.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the installation of a rivet strength test according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation of the withdrawal rivet according to an embodiment of the present utility model;

[0020] Figure 3 for Figure 2 A top view of

[0021] Figure 4 for Figure 1 Top view of .

[0022] Pressing block 100, supporting leg 110;

[0023] Riveted plate 200, receiving hole 210, movable space 220, first loading slot 230, limiting step 240;

[0024] Push rod 300, limit block 310;

[0025] Base 400, second loading slot 410, through hole 420;

[0026] Screw 500. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of this utility model, "several" means one or more, "more" means two or more, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figure 1 and Figure 4 A rivet riveting fixture includes a pressure block 100, which is provided with a support foot 110 for limiting the position of the pressure block 100; a push rod 300, which is provided with a limit block 310; a riveting plate 200, which is provided with a receiving hole 210, a movable space 220, a first loading slot 230 and a limit step 240, and the limit step 240 is used to limit the position of the pressure block 100; a base 400, which is provided with a second loading slot 410 and a through hole 420; and a screw 500. The pressure block 100 is completely set in the loading slot 230. The loading space is used to place the rivet. The part of the rivet pressure block 100 that exceeds the loading space is upset to produce an upsetting head. The upsetting head is limited by the gap, thereby ensuring that the size of the upsetting head meets the test standard.

[0032] Reference Figure 2 and Figure 3 , remove the pressure block 100 from the fixture, then turn the entire fixture over and set the pressure block 100 in the second loading slot 410. At this time, there is no need to set a gap between the pressure block 100 and the second loading slot 410, so it is necessary to insert the end of the pressure block away from the support leg 110 into the second loading slot 410, and then push the rivet out of the loading space with the end of the push rod 300 away from the base 400.

[0033] In some embodiments, a limiting step 240 is provided in the first loading slot 230. The limiting step 240 is used to block the pressure block 100. The pressure block 100 and the bottom of the first loading slot 230 define a gap, which is used to limit the thickness of the pier head. The limiting step is integrated with the first loading slot 230. The limiting step has a large force-bearing area and is not easily deformed when subjected to the pressure of the pressure block 100. It is understood that the limiting step is provided around the peripheral wall of the first loading slot 230 and is distributed in an annular shape. It should be understood that the gap between the first loading slot 230 and the limiting step 240 can change with changes in the limiting step 240.

[0034] In some embodiments, the pressure block 100 is provided with a foot 110 at one end close to the first loading slot 230, and the foot 110 abuts against the bottom of the first loading slot 230. The pressure block 100 defines the gap with the bottom of the first loading slot 230 through the foot 110, and the foot 110 and the pressure block 100 are formed as one piece. When the pressure block 100 is used, the crimping surface of the pressure block 100 can be distinguished according to the foot 110, which has a fool-proof effect. It should be noted that when the pressure block is manufactured, in order to keep its crimping surface from deforming, its crimping surface needs to be electroplated with chrome or gold, or the portion where the crimping surface of the pressure block is located is set to a relatively hard metal, while the portion not on the crimping surface can be set to ordinary carbon steel or epoxy resin or other relatively low-cost materials. At this time, the crimping surface of the pressure block can be distinguished according to the foot, avoiding the pressure block from being installed upside down and affecting the test results.

[0035] It should be noted that the supporting legs 110 and the limiting steps 240 have the same main effect on the clamp, and only one of them can be set.

[0036] In some embodiments, a base 400 is further included. The base 400 is connected to the end of the riveted plate 200 away from the first loading slot 230. The riveted plate 200 is provided with an active space 220. The mandrel 300 is provided with a limit block 310. The limit block 310 is slidably disposed within the active space 220. The base 400 is used to block the limit block 310. The base 400 is provided so that the mandrel 300 can slide while also having the support of the base 400 on the limit block 310, thereby facilitating the transfer of the entire fixture. It should be noted that since the base 400 mainly bears axial force, it is necessary to ensure the material thickness between the bottom of the second loading slot 410 and the limit block 310.

[0037] Reference Figure 1 and Figure 2The base 400 is provided with a second loading slot 410 at one end away from the stop block 310. The second loading slot 410 is used to accommodate the pressure block 100. The end of the push rod 300 away from the first loading slot 230 protrudes into the second loading slot 410. The second loading slot 410 provides space for the pressure block 100 to be installed. After the rivet upsetting test, the pressure block 100 is reversed and installed into the second loading slot 410. By pushing the pressure block 100, the push rod 300 is pushed, so that the push rod 300 ejects the rivet after upsetting. This eliminates the need to hit the push rod 300 with a hammer, reducing the safety risk of hitting the hand with a hammer. It is understood that the gap between the second loading slot 410 and the side of the pressure block 100 should not be too large to ensure that the pressure block 100 will not be ejected when the tester hammers it.

[0038] It should be noted that the riveting plate 200 is provided with a plurality of first loading slots 230. The receiving holes 210, the ejector pins 300, the second loading slots 410, and the movable spaces 220 are all provided in a one-to-one correspondence with the first loading slots 230. Providing a plurality of first loading slots 230 enables upsetting of multiple rivets at once, thereby improving testing efficiency. It should be understood that when testing the performance of multiple rivets at once, human labor cannot meet the upsetting force requirements. In this case, a power device can be provided on the pressing block to meet the upsetting force requirements.

[0039] Reference Figure 1 The second loading slot 410 is provided with a through hole 420 at its center. The end of the ejector pin 300, which is away from the first loading slot 230, is slidably connected to the through hole 420. The through hole 420 is located in the center of the second loading slot 410 to prevent the ejector pin 300 from deforming due to uneven force, which could affect the test results. It should be noted that the through hole 420 must be located in the center of the second loading slot. This is because, for the mechanism to withstand axial force, centering the force can prevent premature damage to a part of the fixture due to large axial force, thereby increasing the service life of the fixture.

[0040] It should be noted that the riveted plate 200 is threadedly connected to the base 400, which makes the riveted plate 200 and the base 400 easy to assemble and disassemble. It should be noted that welding can also be used between the riveted plate 200 and the base 400. However, compared with threaded connection, welding cannot be disassembled and the mechanism basically does not withstand tangential shear force. However, welding is less difficult to process than threaded connection, and threaded connection and welding can also be used in combination. The experimenter can choose according to needs.

[0041] It should be understood that the base 400 and the riveted plate 200 are connected by screws 500, and the ends of the screws 500 are cross screws or hexagon socket screws. It should be noted that to facilitate horizontal placement of the fixture during testing, the threaded holes need to be configured as countersunk holes. For easy installation, the shape of the screw ends must ensure that the fastener tool can easily enter and exit the countersunk holes. Therefore, the ends should be configured as cross screws or internal angle screws, such as those suitable for countersunk holes.

[0042] It should be understood that the base 400 and the riveted plate 200 are both configured in a quadrangular prism shape, and the four edges of the base 400 and the riveted plate 200 are all configured with rounded corners. It should be noted that the base 400 and the riveted plate 200 can also be configured in other polygonal prism shapes. The rounded edges are configured to protect the safety of the subject and reduce the risk of injury to the subject, so as to prevent the subject from accidentally bumping into the edges.

[0043] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A rivet riveting performance test fixture, characterized in that: include: Briquetting (100); Ejector rod (300); A riveting plate (200) is provided with a receiving hole (210), the push rod (300) is slidably arranged in the receiving hole (210), a loading space is defined between the push rod (300) and the receiving hole (210), and the loading space is used to load rivets, the riveting plate (200) is provided with a first loading groove (230), the pressure block (100) is detachably arranged in the first loading groove (230), the pressure block (100) is slidably matched with the first loading groove (230), and a gap is defined between the pressure block (100) and the bottom of the first loading groove (230), and the gap is used to accommodate a heading.

2. A rivet riveting performance test fixture according to claim 1, characterized in that: A limiting step (240) is provided in the first loading slot (230), and the limiting step (240) is used to block the pressing block (100), and the gap is defined between the pressing block (100) and the bottom of the first loading slot (230).

3. A rivet riveting performance test fixture according to claim 1, characterized in that: A support leg (110) is provided at one end of the pressing block (100) close to the first loading slot (230), and the support leg (110) abuts against the bottom of the first loading slot (230). The pressing block (100) defines the gap through the support leg (110) and the bottom of the first loading slot (230).

4. A rivet riveting performance test fixture according to claim 2, characterized in that: The invention also includes a base (400), wherein the base (400) is connected to one end of the riveted plate (200) away from the first loading slot (230), an active space (220) is provided in the riveted plate (200), a limiting block (310) is provided on the push rod (300), and the limiting block (310) is slidably provided in the active space (220), and the base (400) is used to block the limiting block (310).

5. A rivet riveting performance test fixture according to claim 4, characterized in that: A second loading slot (410) is provided at one end of the base (400) away from the limiting block (310), and the second loading slot (410) is used to accommodate the pressing block (100). An end of the ejector rod (300) away from the first loading slot (230) protrudes into the second loading slot (410).

6. A rivet riveting performance test fixture according to claim 5, characterized in that: The riveted plate (200) is provided with a plurality of the first loading slots (230), and the receiving holes (210), the push rods (300), the second loading slots (410) and the movable spaces (220) are all provided in a one-to-one correspondence with the first loading slots (230).

7. A rivet riveting performance test fixture according to claim 5, characterized in that: A through hole (420) is provided at the center of the second loading slot (410), and one end of the push rod (300) away from the first loading slot (230) is slidably connected to the through hole (420).

8. The rivet performance test fixture according to claim 5, characterized in that: The riveting plate (200) is connected to the base (400) by screw threads.

9. A rivet riveting performance test fixture according to claim 8, characterized in that: The base (400) and the riveted plate (200) are connected via screws (500), and the screws (500) are cross screws or hexagon socket screws.

10. A rivet riveting performance test fixture according to claim 9, characterized in that: The base (400) and the riveted plate (200) are both configured as quadrangular prisms, and the four edges of the base (400) and the riveted plate (200) are both configured as rounded corners.

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