CN102901668A - Special curing fixture for cemented dual bars and fixing method for cemented dual bars in tensile strength test for coating - Google Patents

Abstract

The invention relates to a special curing tool for cementing dual rods and a fixing method for cementing dual rods. The curing tool includes a base and a slot seat of the curing tool, and the slot seat of the curing tool includes a positioning plate arranged on the base and a slot seat arranged obliquely And the top cover, the slot seat has a plurality of slots extending along its own inclination direction and can be used to fix the cemented dual rods, the top cover is located at the top of the slot and is perpendicular to the bottom surface of the slot seat, and the top cover is formed There are a plurality of threaded holes whose centers coincide with the centerlines of the plurality of slots, and the positioning plate has a positioning surface located at the bottom of the slots and parallel to the top cover. The special curing tooling for cemented dual rods provided by the present invention adopts a new design, in which the inclined slot ensures the concentricity of the cemented dual rods, and the design of multiple clamped slots greatly improves the efficiency and ensures the identity of the test conditions. Compared with the prior art, the present invention is simple to use, highly efficient, and has stable and accurate test results.

Description

A special curing tool for cemented dual rods and a fixing method for cemented dual rods in coating tensile strength testing

technical field

The invention relates to a tooling, in particular to a curing tool for fixing a cemented dual rod when measuring the bonding strength of a coating, and also relates to a fixing method for a cemented dual rod in a coating tensile strength test.

Background technique

Coating technology is an important means of protection and repair in the modern processing and manufacturing industry, and the bonding strength of the coating is an important indicator for evaluating the performance of the coating. The test method for the tensile bonding strength is as follows: according to the standard, make tensile cemented dual rods of specified size, spray coating on the end face of one dual rod, and perform sandblasting on the other end face, and then glue the dual rods with special glue. Connected together, after heating and curing, the tensile strength test is carried out on a universal testing machine. During the cementing and curing process, it is necessary to fix the cemented dual rod to ensure its concentricity, and apply a certain pressure on both ends of the dual rod.

In the prior art, there is no curing tool specially used for cementing the dual rods, and the common clamps are usually used to fix the cemented dual rods, which has the following disadvantages: First, a clamp can only fix one cemented dual rod at a time, and the coating The tensile bonding strength test requires testing 3 to 5 samples, and a single cemented dual rod curing tool cannot guarantee the identity of the test conditions, and the efficiency is low; The fixture is easily contaminated, and it is inconvenient to clean and take and place the sample; third, the pressure applied by the ordinary fixture is not uniform enough, which affects the test results.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a special fixture for cemented dual rods, which is easy to use, efficient, and conducive to obtaining stable and accurate test results.

At the same time, the present invention also provides a method for fixing the cemented dual rod in the tensile strength test of the coating, which is simple in operation, high in efficiency, and can obtain stable and accurate test results.

In order to solve the problems of the technologies described above, a kind of technical scheme that the present invention takes is:

A special curing tool for cementing dual rods, which includes a base and a slot seat for the curing tool. The bar extends along its own inclined direction and can be used to fix the slots of the cemented dual rods. The top cover is located at the top of the slot and is perpendicular to the bottom surface of the slot seat, and the top cover is formed with a plurality of centers and the plurality of slots. The threaded hole coincides with the center line of the center line, and the positioning plate has a positioning surface located at the bottom of the slot and parallel to the top cover.

According to a further embodiment of the present invention: the angle between the card slot seat and the base is greater than 45° but less than 90°. Preferably, the angle between the card slot seat and the base is greater than 70° but less than 90°. In a specific embodiment, the angle between the card slot seat and the base is 75°.

Preferably, the card slot seat has 3 to 5 card slots. Most preferably, there are five card slots.

Preferably, the card slot is a V-shaped slot.

Preferably, the card slot seat also has a drain groove extending perpendicular to the slot, the position of the drain slot corresponds to the gluing place of the cemented pair rods, and the design of the drain slot solves the problem of overflowing glue polluting tooling and hindering the taking and placing of samples The problem.

Preferably, the positioning surface of the positioning plate and the groove surface of the card slot are all smooth surfaces, for example, the roughness Ra is 1.6; the rest of the surface of the fixing tool is semi-glossy, for example, the roughness Ra is 6.3.

According to a specific aspect of the present invention, the threaded hole of the top cover is an M6 threaded hole. Use M6 flat ground screws with a length of 35mm.

Further, the positioning plate is connected to one end of the base through fixing bolts; the lower end of the slot seat is connected to the positioning plate through fixing bolts; the curing tool also includes a Support base.

Further, the support seat includes side struts located on both sides, the upper end of the side strut is connected to the upper part of the card slot seat through fixing bolts, and the lower end is connected to the end of the base opposite to the end of the positioning plate through fixing bolts. end connections.

Another technical solution adopted by the present invention is: a method for fixing the cemented dual rod in the coating tensile strength test, which adopts the above-mentioned special curing tool for the cemented dual rod to fix the cemented dual rod. Put the dual rod into the card slot of the fixed tooling, fix the cemented dual rod through the card slot to ensure the concentricity of the cemented dual rod, then put a metal gasket on the top of the cemented dual rod, and screw in the flat bottom screw on the top cover, so that It presses against the metal gasket to keep the cemented surface of the cemented dual rod under pressure during the curing process. The diameter of the metal gasket is the same as that of the cemented dual rod, and the thickness is 0.5-1.5 cm.

Generally, the M6 threaded hole uses, for example, an M6 flat ground screw with a length of 35mm. As the metal spacer, a circular spacer having the same diameter as the cemented dual rod and a thickness of about 1 cm was used. For example, when the diameter of the cemented dual rod is 25.4mm, the metal gasket is a circular gasket with a diameter of 25.4mm.

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

The special curing tooling for cemented dual rods provided by the present invention adopts a new design, in which the inclined slot ensures the concentricity of the cemented dual rods, and the design of multiple clamped slots greatly improves the efficiency and ensures the identity of the test conditions. Compared with the prior art, the present invention is simple to use, highly efficient, and has stable and accurate test results.

The adoption of the metal gasket in the method of the invention can make the screw tightening pressure evenly applied to the top surface of the cemented double rod, and compared with the traditional method, the method has high efficiency and more stable and accurate test results.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the schematic diagram of the three-dimensional structure of the special curing frock for cementing dual rods according to the present invention;

Fig. 2 is a schematic front view of Fig. 1 (the support seat is not shown);

Fig. 3 is a schematic top view of Fig. 1 (the support seat is not shown);

Among them: 1. Base; 2. Curing tooling slot seat; 20. Positioning plate; 200. Positioning surface; 21. Card slot seat; 210. Card slot; 3. Side support rod; 4. Cemented dual rod.

Detailed ways

This embodiment provides special curing tooling for the tensile cemented dual rod with a diameter of 25.4mm. As shown in FIG. 1 , the curing tool includes a base 1 , a curing tool slot seat 2 and a support seat. Wherein, the base 1 is a flat plate. The curing tool slot seat 2 includes a positioning plate 20 , a slot seat 21 and a top cover 22 . The positioning plate 20 is connected to one end of the base 1 through three fixing bolts; the lower end of the slot seat 21 is connected to the positioning plate 20 through three fixing bolts. The support base includes side struts 3 on both sides, the upper end of the side struts 3 is connected to the upper part of the slot seat 21 through fixing bolts, and the lower end is connected to the end of the base 1 opposite to the end of the positioning plate 20 through fixing bolts. end connections.

The card slot seat 21 is arranged obliquely, and the angle between it and the base 1 is 75°. The card slot seat 21 has a plurality of vertically arranged card slots 210 and a sewage discharge slot 211 located in the middle and perpendicular to the card slots 210 . The clamping groove 210 is a V-shaped groove, which cooperates with the stretched cemented dual rod, and can fix the cemented dual rod therein. The bottom end of the slot 210 is the upper end surface of the positioning plate 20 , which is defined as the positioning surface 200 in the present invention. The top position of the card slot 210 is a top cover 22 perpendicular to the bottom surface of the card slot seat 21 , and the top cover 22 is connected to the card slot seat 21 by four fixing bolts. The top cover 22 is provided with five M6 threaded holes 220 correspondingly coincident with the centerlines of the five slots 210 one by one. The positioning surface 200 is parallel to the top cover 22 , that is, perpendicular to the bottom surface of the slot seat 21 .

Except that the positioning surface 200 of the positioning plate 2 and the groove surface of the card slot are smooth surfaces with a roughness Ra of 1.6, the rest of the tooling surface is a semi-glossy surface with a roughness Ra of 6.3. Overall, the curing tool is 200cm high, 180cm wide and 200cm long.

The method of using the curing tooling of this embodiment is as follows: put the cemented dual rod with a diameter of 25.4mm into the slot, fix the cemented dual rod through the slot to ensure the concentricity of the dual rod, and then put a diameter of 25.4 mm on the top of the cemented dual rod. 25.4mm metal gasket with a thickness of 1cm, screw the M6 flat ground screw with a length of 35mm into the threaded hole on the top cover to make it tighten the metal gasket and keep the cemented surface of the pair rod under a certain pressure during the curing process.

The curing tooling of this embodiment and the method for using it to fix the cemented pair have the following advantages: the structure of the curing tool is simple, wherein the inclined V-shaped groove ensures the concentricity of the cemented pair, and the pollution of overflowing glue is solved by the design of the sewage tank Tooling and the problem of hindering the taking and placing of samples, the use of metal gaskets can make the screw tightening pressure evenly applied to the top surface of the cemented dual rod. Compared with ordinary fixtures, it is simple and efficient to use, and the test results are stable and accurate.

The present invention has been described in detail above, and its purpose is to allow those familiar with this field to understand the content of the present invention and implement it, and can not limit the scope of protection of the present invention. Effect changes or modifications should be covered within the protection scope of the present invention .

Claims (10)

1. A special curing tool for cementing dual rods, characterized in that it includes a base (1) and a curing tool slot seat (2), and the curing tool slot seat (2) includes a base (1) ) on the positioning plate (20), the obliquely set card slot seat (21) and the top cover (22). The card slot (210) of the rod (4), the top cover (22) is located at the top of the card slot (210) and is perpendicular to the bottom surface of the card slot seat (21), and the top cover (22) is formed with a plurality of threaded holes (220) whose centers coincide with the centerlines of the plurality of slots (210), and the positioning plate (20) has a bottom end located at the slot (210) And a positioning surface (200) parallel to the top cover (22). 2. The special curing tool for cemented dual rods according to claim 1, characterized in that: the angle between the slot seat (21) and the base (1) is greater than 45° but less than 90°. 3. The special curing tool for cemented dual rods according to claim 2, characterized in that: the angle between the slot seat (21) and the base (1) is greater than 70° but less than 90°. 4 . The special curing tool for cemented dual rods according to claim 1 , characterized in that: the slot holder ( 21 ) has 3 to 5 slots ( 210 ). 5. The special curing tool for cemented dual rods according to claim 1, characterized in that: the said clamping groove (210) is a V-shaped groove. 6. The special curing tool for cemented dual rods according to claim 1, characterized in that: the slot holder (21) also has a sewage drain (211) extending in a direction perpendicular to the slot (210), the The position of the sewage discharge groove (211) corresponds to the cemented part of the cemented pair rod (4). 7. The special curing tool for cemented dual rods according to claim 1, characterized in that: the positioning surface (200) of the positioning plate (2) and the groove surface of the card slot (210) are all smooth surfaces; The remaining surfaces of the fixture are semi-gloss. 8. The special curing tool for cemented dual rods according to any one of claims 1 to 7, characterized in that: the positioning plate (20) is connected to one end of the base (1) by fixing bolts above; the lower end of the slot seat (21) is connected with the positioning plate (20) through fixing bolts; the curing tooling also includes Support seat between bases (1). 9. The special curing tool for cemented dual rods according to claim 8, characterized in that: the support seat includes side struts (3) on both sides, and the upper ends of the side struts (3) pass through The fixing bolt is connected to the upper part of the slot seat (21), and the lower end is connected to the end of the base (1) opposite to the end where the positioning plate (20) is located through the fixing bolt. 10. A method for fixing the cemented dual rod in the coating tensile strength test, characterized in that: the method adopts the special curing tooling for the cemented dual rod described in any one of claims 1 to 9 to fix the cemented dual rod , the specific operation is as follows: Put the cemented dual rod into the card slot of the fixed tooling, fix the cemented dual rod through the card slot to ensure the concentricity of the cemented dual rod, then put a metal gasket on the top of the cemented dual rod, and place it on the top cover Screw in the flat-bottomed screw to tighten the metal gasket to keep the cemented surface of the cemented dual rod under pressure during the curing process. The diameter of the metal gasket is the same as that of the cemented dual rod, and the thickness is 0.5 ~1.5 cm.

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