Fixture for testing brazing shear resistance of PCD (Poly Crystal Diamond) cutter

Abstract

The utility model relates to a clamp for testing the brazing shear resistance of a PCD (Poly Crystal Diamond) cutter. The clamp comprises a back plate, a face plate, a limiting block, a gasket, an adjusting plate and a pressing head. A bulge is arranged on the back plate; the protrusion comprises a first side edge in the X direction and a second side edge in the Y direction. The X direction is perpendicular to the Y direction; the panel and the back plate are correspondingly arranged, and the distance between the panel and the back plate is adjustable; the limiting block is slidably connected to the first side edge. The limiting block and the second side edge are used for clamping the two opposite sides of the sample. According to the utility model, a sample is fixed through the structures such as the back plate, the limiting block and the gasket, and the pressure head is accurately adjusted through the structures such as the panel and the adjusting plate, so that the clamp for testing the brazing shear resistance of the PCD cutter can effectively meet the requirement for testing the shear resistance of a brazing joint of the PCD cutter; powerful support is provided for related research and industrial application, and meanwhile, the designed clamp has the advantages of being simple in structure, convenient to operate and high in testing precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool testing technical field, especially a kind of fixture for testing PCD cutter brazing shear performance. BACKGROUND

[0002] With the sustained development of manufacturing industry, the performance requirements of tool materials are increasing. Polycrystalline diamond (PCD) has been widely used in high-precision and high-efficiency processing due to its excellent hardness, wear resistance and heat resistance. However, during the manufacturing process, PCD cutters need to be fixed on the cutter body through brazing technology, and the quality of brazing directly affects the service life and working efficiency of the cutter. Therefore, it is particularly important to develop a method and device that can accurately evaluate the shear strength of PCD cutter brazed joints.

[0003] Although there are some standard methods and corresponding equipment for testing the shear performance of ordinary metal material joints on the market, there is still a lack of tools specifically designed for the shear performance detection of cutter brazed joints made of special materials like PCD. In addition, existing testing methods often fail to achieve the required precision level or cannot fully simulate the stress conditions under actual working conditions. SUMMARY

[0004] Therefore, it is necessary to provide a fixture for testing the brazing shear performance of PCD cutters to address the problem that existing fixtures cannot achieve the required precision level for PCD cutters.

[0005] A fixture for testing the brazing shear performance of PCD cutters includes:

[0006] a back plate with a protrusion disposed thereon; the protrusion includes a side edge one in the X direction and a side edge two in the Y direction; the X direction and the Y direction are perpendicular to each other;

[0007] a face plate disposed corresponding to the back plate, and the distance between the face plate and the back plate is adjustable;

[0008] a limiting block slidingly connected to the side edge one; the limiting block and the side edge two are used to clamp the opposite sides of the sample;

[0009] a gasket connected to the back plate; the gasket is located between the limiting block and the side edge two, and the gasket is used to abut the other side of the sample;

[0010] an adjusting plate slidingly connected to the face plate in the X direction; the adjusting plate has a limiting through hole parallel to the Y direction; the limiting through hole is disposed towards the sample;

[0011] a pressure head slidingly connected to the adjusting plate through the limiting through hole; the pressure head is used to move along the Y direction to transmit shear force to the sample.

[0012] As a preferred example, the back plate and the protrusion are integrally formed.

[0013] As a preferred example, the face plate is arranged in parallel with the back plate, and a plurality of distance adjusting bolts are arranged between the face plate and the back plate for adjusting the distance.

[0014] As a preferred example, the back plate and the face plate are both arranged in a rectangular shape; the distance adjusting bolts are four in number and are arranged at the four corners of the back plate, respectively.

[0015] As a preferred example, a first limiting bolt for adjusting the position of the limiting block is arranged between the limiting block and the back plate.

[0016] As a preferred example, a second limiting bolt for adjusting the position of the gasket is arranged between the gasket and the back plate, and the adjusting direction of the gasket is towards the face plate.

[0017] As a preferred example, the gaskets are multiple in number; each gasket has a different thickness and can be bonded with the back plate.

[0018] As a preferred example, a clamping block is connected to one side of the adjusting plate; the clamping block is clamped on both sides of the edge of the face plate; a third limiting bolt for adjusting the clamping block is arranged between the clamping block and the face plate.

[0019] As a preferred example, the cross section of the pressure head is arranged in a rectangular shape.

[0020] As a preferred example, the materials of the back plate, the face plate, the limiting block and the gasket are all stainless steel materials.

[0021] The utility model discloses the beneficial effect lies in: the utility model discloses through back plate, limiting block, gasket etc. Structure realizes the fixation to sample, again through face plate, adjusting plate etc. Structure realizes the accurate adjustment of pressure head, provides a clamp for the detection of PCD cutter, makes the clamp in the testing process can provide higher precision, can effectively satisfy the demand of PCD cutter brazed joint shear performance test, provides strong support for related research and industrial application, and the clamp designed simultaneously has the advantages of simple structure, convenient operation, high testing precision. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the three -dimensional structure schematic diagram for the clamp for testing PCD cutter brazed shear performance;

[0023] Figure 2 It is the structure schematic diagram of back plate;

[0024] Figure 3 It is the structure schematic diagram of adjusting plate;

[0025] Figure 4 Fig. 1 is a schematic view of a fixture for testing the brazing shear resistance of PCD cutters in operation.

[0026] In the figure: back plate 1, protrusion 11, face plate 2, limit block 3, spacer 4, adjustment plate 5, limit through hole 51, clamping block 52, pressure head 6, distance adjustment bolt 7, first limit bolt 8, second limit bolt 9, third limit bolt 10. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] It should be noted that when an element is referred to as being "mounted on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or there can be an intervening element. When an element is referred to as being "fixed on" another element, it can be directly fixed on the other element or there can be an intervening element.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships as shown by the drawings, and are merely used for convenience and brevity in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing the specific embodiments of the present application, and is not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0031] Reference will now be made to Figure 1This embodiment provides a fixture for testing the brazed shear resistance of PCD cutting tools, comprising a back plate 1, a front plate 2, a limiting block 3, a shim 4, an adjusting plate 5, and a pressure head 6. Specifically, the back plate 1 serves as the base for placing the brazed cutting tool sample, and has an L-shaped or cross-shaped protrusion 11 integrally formed on it. For ease of subsequent structural description, as... Figure 2 As shown, the protrusion 11 includes a side 1 along the X direction and a side 2 along the Y direction, and the X and Y directions are perpendicular to each other (for ease of understanding, in this embodiment, the Y direction is set as the direction of gravity, and the X direction is set as the horizontal direction along the surface of the back plate 1). The panel 2 can be the same as the back plate 1, set as a rectangular structure of the same size, and the panel 2 is set parallel to the side of the back plate 1 on which the protrusion 11 is provided. Through holes are provided at the four corners of the panel 2 and the back plate 1. Adjusting bolts 7 are inserted into the corresponding through holes. By rotating and adjusting the multiple nuts on the adjusting bolts 7, the distance between the panel 2 and the back plate 1 can be adjusted to ensure that the tip of the pressure head 6 is directly above the test sample.

[0032] One side of the limiting block 3 is slidably connected to the back plate 1, and the other side is slidably connected to the side edge 1. Simultaneously, a flange is provided at the edge of the back plate 1. A screw hole is provided on the flange. A first limiting bolt 8 is screwed into the screw hole. The end of the first limiting bolt 8 applies pressure to the side of the limiting block 3 away from the side edge 2, so that the limiting block 3 and the side edge 2 together clamp the opposite sides of the sample, thus fixing the sample in the X direction. It should be noted that the sample used in this embodiment is a sample brazed under the same conditions for testing. To facilitate fixing, the sample shape can be made into a regular shape such as a square or rectangle (for example, the sample includes a template and a brazed joint. The template is square. The brazed joint is a PCD, which is fixed to the template by brazing). On the other hand, if testing is performed on a physical tool sample, the size and shape of the limiting block 3 can be designed to match the shape of the sample. Its specific size and shape are not overly restricted; the ultimate goal is to make the limiting block 3 fit the sample more closely, thereby increasing the fixing effect on the sample. In another embodiment, the back plate 1, the front panel 2, the limiting block 3, and the gasket 4 can all be made of stainless steel to ensure that the fixture has sufficient structural strength.

[0033] A gasket 4 is installed between the limiting block 3 and the second side. The function of the gasket 4 is to restrict the movement of the sample in the Z direction (which is perpendicular to the X and Y directions). In this embodiment, a screw hole is provided on the back plate 1, directly opposite the gasket 4. A second limiting bolt 9 is screwed into the screw hole. The end of the second limiting bolt 9 is rotatably connected to the gasket 4, or directly abuts against the gasket 4. By rotating the second limiting bolt 9, the position of the gasket 4 in the Z direction can be adjusted, thereby limiting different samples. In another embodiment, multiple gaskets 4 are provided, and each gasket 4 has a different thickness. By selecting gaskets 4 of different thicknesses and bonding them to corresponding positions on the back plate 1, they can be used to limit different samples in the Z direction.

[0034] The adjusting plate 5 is slidably connected to the edge of the panel 2 along the X direction, and a limiting through hole 51 parallel to the Y direction is provided on the adjusting plate 5. This limiting through hole 51 faces the sample. In this embodiment, the adjusting plate 5 is connected to the panel 2 in the following way: Figure 3 As shown, a clamping block 52 is connected to one side of the adjusting plate 5. The clamping block 52 clamps both sides of the edge of the panel 2, and a screw hole is opened on one side of the clamping block 52. A third limiting bolt 10 is screwed into the screw hole. When the third limiting bolt 10 is tightened, its end abuts against the panel 2, fixing the adjusting plate 5 to the panel 2. When the third limiting bolt 10 is loosened, its end disengages from the panel 2, allowing the adjusting plate 5 to slide easily against the edge of the panel 2, ensuring that the tip of the indenter 6 is always in the optimal testing position for the brazed specimen. The tail end of the indenter 6 can be connected to a universal testing machine to apply longitudinal shear force to the specimen. In use, the indenter 6 slides through the limiting through hole 51 and is slidably connected to the adjusting plate 5, ensuring the stability of the indenter 6 when transmitting shear force. In addition, indenters 6 of different specifications can be replaced to use different specimens. The cross-section of the indenter 6 is preferably also rectangular, so that one side of the indenter 6 can more easily fit the specimen.

[0035] The working principle of the fixture used to test the brazing shear resistance of PCD cutting tools is as follows: Figure 4 As shown, the PCD tool brazed specimen to be tested is first clamped and fixed between the limiting block 3 and the second side, thus fixing the specimen in the X direction. One of the Z-directions is limited by the setting of the shim 4 on one side. The first side limits the specimen in the bottom direction (i.e., one of the Y directions). After adjusting the position of the indenter 6 relative to the specimen (the indenter 6 is located on the other Z-direction side of the specimen), the indenter 6 connected to the universal testing machine applies a downward longitudinal shear force to the specimen (refer to...). Figure 1 and Figure 4 In this embodiment, the template is fixed between the limiting block 3 and the second side, and the pressure head 6 applies force to the brazed joint until the brazed joint breaks.

[0036] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered as the scope of the description.

[0037] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the utility model concept, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A fixture for testing brazed shear resistance of PCD cutters, characterized by, It includes: The back plate (1) is provided with a convex (11); the convex (11) includes side one along the X direction and side two along the Y direction; the X direction and the Y direction are perpendicular to each other; The panel (2) is provided correspondingly with the back plate (1), and the distance between the panel (2) and the back plate (1) is adjustable; The limiting block (3) is slidingly connected on the side one; the limiting block (3) and the side two are used for clamping the opposite sides of the sample; The gasket (4) is connected on the back plate (1); the gasket (4) is located between the limiting block (3) and the side two, and the gasket (4) is used for abutting with the other side of the sample; The adjusting plate (5) is slidingly connected on the panel (2) along the X direction; the adjusting plate (5) is provided with a limiting through hole (51) parallel to the Y direction; the limiting through hole (51) is arranged towards the sample; The pressure head (6) is slidingly connected on the adjusting plate (5) through the limiting through hole (51); the pressure head (6) is used for moving along the Y direction to transmit the shear force to the sample.

2. The fixture for testing brazed shear performance of PCD cutters according to claim 1, wherein, The back plate (1) and the convex (11) are integrally formed.

3. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The panel (2) is arranged parallel to the back plate (1), and a plurality of distance adjusting bolts (7) for adjusting the distance are arranged between the panel (2) and the back plate (1).

4. The fixture for testing brazed shear performance of PCD cutter inserts of claim 3, wherein, The back plate (1) and the panel (2) are both arranged as rectangles; the distance adjusting bolts (7) are four, and are arranged at the four corners of the back plate (1) respectively.

5. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The first limiting bolt (8) for adjusting the position of the limiting block (3) is arranged between the limiting block (3) and the back plate (1).

6. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The second limiting bolt (9) for adjusting the position of the gasket (4) is arranged between the gasket (4) and the back plate (1), and the adjusting direction of the gasket (4) is towards the panel (2).

7. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The number of the gaskets (4) is multiple; the thickness of each gasket (4) is different, and each gasket (4) can be bonded with the back plate (1).

8. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The side of the adjusting plate (5) is connected with a clamping block (52); the clamping block (52) is clamped on both sides of the edge of the panel (2); the third limiting bolt (10) for adjusting the clamping block (52) is arranged between the clamping block (52) and the panel (2).

9. The fixture for testing brazed shear performance of PCD cutter inserts of claim 1 wherein, The cross section of the pressure head (6) is arranged as a rectangle.

10. The fixture for testing brazed shear performance of PCD cutters of claim 1, wherein, The materials of the back plate (1), the panel (2), the limiting block (3) and the gasket (4) are all stainless steel materials.

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