Self-aligning coaxial positioning tool

Abstract

The invention provides a self-aligning coaxial positioning tool. The self-aligning coaxial positioning tool comprises two hanging seats and a loading chain, loading chain self-aligning mechanisms are installed at the two ends of the loading chain, and the two loading chain self-aligning mechanisms are embedded into the two hanging seats respectively; a hanging locking mechanism is installed on one side of the outer wall of each hanging seat, each hanging locking mechanism is of a door type locking structure and specifically comprises a clamping plate and a door plate, the clamping plates and the door plates are rotationally installed on the two sides of the outer walls of the hanging seats correspondingly, and one end of each door plate is embedded into a groove in the corresponding clamping plate in a door closing mode to complete door closing clamping. By designing the self-aligning coaxial positioning mechanism, the high-precision coaxiality of the sample in the test process can be ensured, and the deviation of test data caused by positioning errors is avoided. Meanwhile, the mechanical design of the anti-falling sliding plate is adopted, and a self-locking mechanism is matched, so that the loading chain can be effectively prevented from sliding in the testing process, and the stability of the loading chain is ensured.

Description

Technical Field

[0001] The present invention is applied to an auxiliary tool for connecting a test sample and a test system in high-temperature material mechanics tests, specifically a self-aligning coaxial positioning tooling. Background Art

[0002] In the process of high-temperature tensile mechanics tests of metal materials, the test samples generally adopt a threaded structure at both ends. The loading chain and the hanging seat for assisting the connection between the sample and the test system are a set of very rigorous auxiliary toolings, which play a key role in the tensile coaxiality of the test sample during the test. During the test, due to the large coaxiality error of the sample, it will seriously affect the accuracy of the test results. And due to the limitation of the sample threaded structure, for the convenience of operation, the loading chain tooling is generally connected to the test system by hanging. The hanging structure has the advantage of convenient operation due to its unique method, but at the same time, there is also a problem of large coaxial error, thus forming a situation where it is impossible to have both fish and bear's paws. Currently, high-temperature tensile test systems on the market generally adopt the method of adding a coaxial ring to ensure the coaxial problem of the sample. However, due to the large discreteness of manual operation and the deviation in the fineness of each operation, even with the coaxial ring as a guarantee, there will still be a situation where the coaxial repeatability is not good. Regarding the traditional sample connection auxiliary tooling, the following problems are summarized:

[0003] 1) The hanging seat has no positioning function. Even if some companies' products have a positioning function, they still lack a locking mechanism, and the operation varying from person to person results in a large discreteness of coaxiality;

[0004] 2) The loading chain has no self-aligning function. The loading chain is a straight rod structure with a length close to one meter. It is always impossible to ensure the concentric tolerance of the front and rear ends during the machining of the straight rod. Due to the large concentric tolerance, after being transmitted to the sample over a long distance, the eccentricity will increase geometrically;

[0005] 3) Some products adopt a coaxial ring mechanism to make up for the poor coaxial situation. However, due to the deviation problem of the hanging mechanism, the role played by this coaxial ring mechanism is not obvious, which not only causes waste of resources but also fails to play an obvious role;

[0006] 4) The hanging seat mechanism has no anti-falling function. After the sample is broken, the lower loading chain will fall freely and hit the lower hanging seat. The falling position is uncertain, which makes the loading chain skewed, easily damages the furnace chamber of the high-temperature furnace, and even touches the heating wire to cause a short circuit situation. Summary of the Invention

[0007] In view of the deficiencies of the prior art, the present invention is achieved through the following technical solutions: A self-aligning coaxial positioning tooling, comprising two hanging seats and a loading chain. Loading chain self-aligning mechanisms are installed at both ends of the loading chain, and the two loading chain self-aligning mechanisms are respectively embedded in the two hanging seats;

[0008] On one side of the outer wall of the two hanging seats, a hanging locking mechanism is installed. The hanging locking mechanism adopts a portal locking structure, specifically including a clamping plate and a door plate. The clamping plate and the door plate are respectively rotatably installed on both sides of the outer wall of the hanging seat. By closing the door, one end of the door plate is urged to be embedded into the groove inside the clamping plate to complete the closing and clamping. A rolling bearing is installed at the rear end of the door plate and is in contact with and presses against the outer wall of the loading chain self-aligning mechanism;

[0009] On the other side of the outer wall of the two hanging seats, an anti-falling mechanism is installed. The anti-falling mechanism includes a mounting plate fixed on the outer wall of the hanging seat. A sliding groove is provided on the mounting plate, and a fastening bolt is arranged in the sliding groove. An anti-falling plate is also installed on the fastening bolt, and the anti-falling plate slides into the inside of the hanging seat through a window provided on the hanging seat and is located below the end of the loading chain.

[0010] Preferably, a high-temperature furnace is installed at the midpoint of the outer wall of the loading chain. The outside of the high-temperature furnace is sleeved with a housing, and two semi-circular protective mesh shells are installed on the outer wall of the housing.

[0011] Preferably, a sample is installed at the middle position of the loading chain inside the high-temperature furnace.

[0012] Preferably, the loading chain self-aligning mechanism adopts a ball and socket structure and is embedded in the hanging seat. The outer wall of the outer circle of the socket is in contact with the outer wall of the rolling bearing.

[0013] Preferably, the socket is limited by a circlip.

[0014] Preferably, the loading chain is a central high-temperature straight rod, and one end of the central high-temperature straight rod is threadedly connected to the ball head of the loading chain self-aligning mechanism.

[0015] Preferably, the number of the rolling bearings is two, and the two rolling bearings are respectively installed at the upper and lower ends of the midpoint position on the front end face of the door plate through bolts.

[0016] Preferably, the two hanging seats are both processed and formed into an integral structure by a revolving body.

[0017] Preferably, one end of the fastening bolt penetrates through the sliding groove and is threadedly sleeved with a nut. The nut is located above the mounting plate and has a diameter larger than the width of the sliding groove. The fastening bolt is rotatably connected to the anti-falling plate, and the anti-falling plate is located below the mounting plate.

[0018] Preferably, connection heads are fixedly arranged at the upper and lower ends in the vertical direction and at the midpoints of the separated ends of the two hanging seats, and a test system moving upper crossbeam and a test system moving lower crossbeam are respectively installed at the ends of the two connection heads away from the hanging seats.

[0019] The present invention provides a self-aligning coaxial positioning tooling, which has the following beneficial effects:

[0020] 1. The hanging seat is increased with a positioning and locking function, and precise positioning is carried out by using the outer circles of the hanging joints at both ends of the loading chain, supplemented by a positioning and locking mechanism to ensure accurate positioning and no deviation during each installation.

[0021] 2. The hanging seat is integrally processed to ensure the concentricity tolerance between the outer circle connected to the test system and the positioning outer circle of the hanging joint of the loading chain, and always control the concentric deviation within a range to reduce the concentricity deviation exceeding the range caused by assembly errors.

[0022] 3. Self-aligning mechanisms are designed at both ends of the loading chain to eliminate the problem of poor coaxiality of the sample caused by the assembly error of the test system.

[0023] 4. The hanging seat is increased with an anti-falling mechanism to eliminate the safety hazard caused by falling; and the coaxial ring mechanism is saved, which not only makes a great contribution to cost control, increases the market competitiveness of the product, but also conforms to the national advocated development strategy of green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the axonometric structure schematic diagram of the present invention;

[0025] Figure 2 is of the present invention Figure 1 partial structure schematic diagram;

[0026] Figure 3 is of the present invention Figure 1 partial front sectional structure schematic diagram;

[0027] Figure 4 is of the present invention Figure 3 structural side sectional schematic diagram at the self-aligning mechanism of the loading chain;

[0028] Figure 5 is the structure schematic diagram at the hanging seat of the present invention;

[0029] Figure 6 is the connection structure schematic diagram of the hanging seat and the loading chain of the present invention;

[0030] Figure 7 is of the present invention Figure 6 structural schematic diagram from another perspective;

[0031] Figure 8 is of the present inventionFigure 3 Schematic diagram of the local enlarged structure at .

[0032] Among them, 1. upper moving beam of the test system; 2. protective mesh shell; 3. self-aligning mechanism of the loading chain; 4. lower moving beam of the test system; 5. loading chain; 6. mounting seat; 7. high temperature furnace; 8. sample; 9. housing; 10. mounting locking mechanism; 1001. rolling bearing; 1002. clamping plate; 1003. door panel; 11. connector; 12. anti-fall mechanism; 1201. fastening bolts; 1202. mounting plate; 1203. anti-fall plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example:

[0035] like Figures 1 - 8 As shown, the embodiment of the present invention provides a self-aligning coaxial positioning tool, including two hanging seats 6 and a loading chain 5, both ends of the loading chain 5 are installed with a loading chain self-aligning mechanism 3, the two loading chain self-aligning mechanisms 3 are respectively embedded in the two hanging seats 6, a high-temperature furnace 7 is installed at the midpoint of the outer wall of the loading chain 5, the outer side of the high-temperature furnace 7 is covered with an outer shell 9, and two semicircular protective mesh shells 2 are installed on the outer wall of the outer shell 9;

[0036] A hanging locking mechanism 10 is installed on one side of the outer wall of the two hanging seats 6. The hanging locking mechanism 10 adopts a door-type locking structure, specifically including a clamping plate 1002 and a door panel 1003. The clamping plate 1002 and the door panel 1003 are rotatably installed on both sides of the outer wall of the hanging seat 6 respectively. The door closing mode causes one end of the door panel 1003 to be embedded in the groove inside the clamping plate 1002 to complete the door closing clamping. A rolling bearing 1001 is installed at the rear end of the door panel 1003 and is in contact with and pressed against the outer wall of the loading chain self-aligning mechanism 3;

[0037] By providing a hooking and locking mechanism 10 on the hooking seat 6, the hooking and locking mechanism 10 is in an open state when the self-aligning mechanism 3 of the loading chain at the lower end of the loading chain 5 is not placed inside the hooking seat 6, that is, the clamping plate 1002 and the door plate 1003 are respectively located on both sides of the hooking seat 6. When the self-aligning mechanism 3 of the loading chain is placed inside the hooking seat 6, the clamping plate 1002 and the door plate 1003 are rotated respectively. During the rotation of the door plate 1003, since the door plate 1003 has an L-shaped structure, one end is embedded into the card slot of the clamping plate 1002 to complete the clamping connection. At the same time, after the clamping plate 1002 and the door plate 1003 are clamped and fixed, the rolling bearing 1001 located at the front end of the door plate 1003 fits against the outer side of the self-aligning mechanism 3 of the loading chain to play an auxiliary extrusion and fixing effect.

[0038] On the other side of the outer wall of the two hooking seats 6, an anti-falling mechanism 12 is installed. The anti-falling mechanism 12 includes a mounting plate 1202, the mounting plate 1202 is fixed on the outer wall of the hooking seat 6, a sliding groove is provided on the mounting plate 1202 and a fastening bolt 1201 is arranged in the sliding groove. An anti-falling plate 1203 is also installed on the fastening bolt 1201, and the anti-falling plate 1203 slides into the inside of the hooking seat 6 through the window provided on the hooking seat 6 and is located under the end of the loading chain 5. Through the reserved window of the hooking seat 6, the anti-falling plate 1203 can enter and exit. That is, before installing the loading chain 5, the anti-falling plate 1203 is withdrawn to leave a larger installation space. After the installation is completed, the anti-falling plate 1203 is pushed into the bottom of the hooking head of the loading chain 5 to reduce the falling distance of the sample 8 after it breaks, playing an anti-falling function.

[0039] Refer to Figure 1 、 Figure 3 and Figure 8 As shown in

[0040] Refer to Figure 4 As shown in

[0041] Reference Figure 3 The loading chain 5 is a central high-temperature straight rod, one end of which is connected to the ball head of the loading chain self-aligning mechanism 3 by a thread; that is, the structure of the entire loading chain 5 is composed of a central high-temperature straight rod and self-aligning mechanisms at both ends, and the self-aligning mechanism adopts a ball head and ball seat structure, which allows the high-temperature straight rod to swing freely.

[0042] The two mounting seats 6 are both formed by a rotating body into an integrated structure; the mounting seat 6 body is formed by a rotating body, and the integrated processing ensures that the concentricity tolerance of the two outer circles is within a very small range.

[0043] Reference Figures 4 - 7 , one end of the fastening bolt 1201 passes through the sliding groove and is threadedly sleeved with a nut, wherein the nut is located at the upper end of the mounting plate 1202 and has a diameter greater than the width of the sliding groove, the fastening bolt 1201 is rotatably connected to the anti-falling plate 1203 and the anti-falling plate 1203 is located at the lower end of the mounting plate 1202;

[0044] Specifically, when in use, the fastening bolt 1201 is twisted to loosen it, and then the fastening bolt 1201 is pulled outward to drive the inner anti-fall plate 1203 to move outward in a linked movement, and the fastening bolt 1201 slides along the sliding groove. After the anti-fall plate 1203 is moved to the inside of the hanging seat 6, the fastening bolt 1201 and the nut can be tightened to squeeze and fix it on the mounting plate 1202 to complete the positioning effect.

[0045] Working principle: When in use, the loading chain self-aligning mechanism 3 at both ends of the loading chain 5 is embedded into the inside of the hanging seat 6, and then locked by the hanging locking mechanism 10 on the hanging seat 6, wherein the hanging locking mechanism 10 is a door-type locking form, which is locked by closing the door, and the contact with the outer circle of the ball head seat of the loading chain 5 is tightened by a rolling bearing 1001, and the anti-fall mechanism 12 is installed at the rear of the hanging seat 6, and the anti-fall plate 1203 can be entered and exited through the window reserved by the hanging seat 6, that is, the anti-fall plate 1203 is withdrawn before installing the loading chain 5, leaving a larger installation space, and after the installation is completed, the anti-fall plate 1203 is pushed into the bottom of the loading chain 5 hanging joint, reducing the falling distance of the sample 8 after it breaks, and playing the anti-fall function; that is, during the operation of the test personnel, through the ingenious mechanism design such as positioning, locking and self-aligning, to ensure that the coaxiality of the sample 8 is within the required range in each test, and eliminate the problem of coaxiality discreteness caused by human operation errors. The self-aligning mechanism will automatically find the most suitable tensioning state after the load is applied to the sample 8.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-aligning coaxial positioning tooling, comprising two hanging seats (6) and a loading chain (5), characterized in that: Loading chain self-aligning mechanisms (3) are installed at both ends of the loading chain (5), and the two loading chain self-aligning mechanisms (3) are respectively embedded in two hanging seats (6). On one side of the outer wall of the two hanging seats (6), a hanging and locking mechanism (10) is installed. The hanging and locking mechanism (10) adopts a portal locking structure, specifically including a clamping plate (1002) and a door plate (1003). The clamping plate (1002) and the door plate (1003) are respectively rotatably installed on both sides of the outer wall of the hanging seat (6). By closing the door, one end of the door plate (1003) is embedded into the groove inside the clamping plate (1002) to complete the closing and clamping. A rolling bearing (1001) is installed at the rear end of the door plate (1003) and is in contact with and pressed against the outer wall of the loading chain self-aligning mechanism (3). On the other side of the outer wall of the two hanging seats (6), a falling prevention mechanism (12) is installed. The falling prevention mechanism (12) includes a mounting plate (1202). The mounting plate (1202) is fixed on the outer wall of the hanging seat (6). A sliding groove is formed on the mounting plate (1202), and a fastening bolt (1201) is arranged in the sliding groove. A falling prevention plate (1203) is also installed on the fastening bolt (1201), and the falling prevention plate (1203) slides into the inside of the hanging seat (6) through the window formed on the hanging seat (6) and is located below the end of the loading chain (5).

2. The self-aligning coaxial positioning tooling according to claim 1, characterized in that: A high-temperature furnace (7) is installed at the midpoint of the outer wall of the loading chain (5). The outside of the high-temperature furnace (7) is sleeved with a housing (9), and two semi-circular protective mesh shells (2) are installed on the outer wall of the housing (9).

3. The self-aligning coaxial positioning tooling according to claim 2, wherein: A sample (8) is installed at the middle position of the loading chain (5) inside the high-temperature furnace (7).

4. The self-aligning coaxial positioning tooling according to claim 1, characterized in that: The loading chain self-aligning mechanism (3) adopts a ball and socket structure. The ball and socket structure includes a ball head and a ball socket and is embedded in the hanging seat (6). The outer wall of the outer circle of the ball socket is in contact with the outer wall of the rolling bearing (1001).

5. A self-aligning coaxial positioning tooling according to claim 4, characterized in that: The ball socket is limited by a circlip.

6. The self-aligning coaxial positioning tooling according to claim 1, wherein: The loading chain (5) is a central high-temperature straight rod. One end of the central high-temperature straight rod is threadedly connected to the ball head of the loading chain self-aligning mechanism (3).

7. The self-aligning coaxial positioning tooling according to claim 1, characterized in that: The number of the rolling bearings (1001) is two. The two rolling bearings (1001) are respectively installed at the upper and lower ends of the midpoint position on the front end face of the door plate (1003) through bolts.

8. The self-aligning coaxial positioning tooling according to claim 1, characterized in that: The two hanging seats (6) are both processed into an integral formed structure by a revolving body.

9. The self-aligning coaxial positioning tooling according to claim 1, characterized in that: One end of the fastening bolt (1201) penetrates through the sliding groove and is threadedly sleeved with a nut. The nut is located above the mounting plate (1202) and has a diameter larger than the width of the sliding groove. The fastening bolt (1201) is rotatably connected to the falling prevention plate (1203), and the falling prevention plate (1203) is located below the mounting plate (1202).

10. A self-aligning coaxial positioning tooling according to claim 1, characterized in that: Connectors (11) are fixedly arranged at the midpoints of the upper and lower ends in the vertical direction of the two hanging seats (6) and at the separated ends. One end of the two connectors (11) away from the hanging seats (6) is respectively installed with a test system moving upper cross beam (1) and a test system moving lower cross beam (4).

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