Fixing block device for clamping Almen N-type shot blasting test piece

Abstract

The utility model discloses a fixing block device for clamping an Almen N-type shot blasting test piece, which comprises a base body with a working surface, the length of the working surface is greater than or equal to that of the test piece, and the width of the working surface is greater than that of the test piece; a U-shaped groove used for containing a nozzle is machined in the working face in the width direction, the groove width of the U-shaped groove is 14.2 mm, the groove length of the U-shaped groove is larger than the width of the test piece, the groove depth of the U-shaped groove is 17.1 mm, and the bottom of the groove is a semicircular arc with the radius of R7.1; a plurality of test piece clamping devices for clamping and fixing test pieces on the working surface are mounted on the working surface; during shot blasting, a test piece is horizontally placed on the working face, the center line of the test piece in the length direction is flush with the center line of the U-shaped groove in the length direction, the test piece clamping device clamps and fixes the test piece on the working face, and the nozzle reciprocates along the center line of the U-shaped groove in the length direction for shot blasting. According to the utility model, the test piece is fast and convenient to mount and dismount, and a 14.2 mm part needing shot blasting in the middle of the test piece is accurately reserved.

Description

Technical Field

[0001] The utility model relates to surface shot peening strengthening, in particular to a fixing block device for clamping an Almen N type shot peening test piece. Background Art

[0002] At present, when determining the shot peening intensity of a hole of Φ13-Φ20, the commonly used fixture for clamping the Almen N type test piece is to clamp the test piece on an ordinary test piece fixing block, and then use two iron sheets to block the two sides of the test piece, and use a caliper to measure whether the distance of the gap between the two iron sheets is 14.2mm. If it is 14.2mm, then after tightening the two sides of the iron sheet with screws, shot peening is performed. If not, it is necessary to continue to adjust the distance between the two iron sheets until the middle gap is 14.2mm. In this process, first of all, at least 2 people are required to cooperate: 1 person constantly adjusts the distance between the two iron sheets, and the other person measures the distance between the gaps of the two iron sheets, and the operation is cumbersome and complicated; secondly, when measuring the distance, it is carried out when the two iron sheets are not fixed, so the accuracy of the measured data cannot be effectively controlled and guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the disadvantages that it is time-consuming and laborious to clamp the test piece with an ordinary test piece fixing block when determining the shot peening strength of a Φ13-Φ20 inner hole, and the accuracy is not high, the utility model provides a fixing block device for clamping the Almen N type shot peening test piece which can quickly clamp the test piece and is easy to operate and quick.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A fixing block device for clamping an Almen N-type shot peening test piece comprises a base body, wherein:

[0006] The substrate has a working surface, the length of the working surface is greater than or equal to the length of the test piece, and the width of the working surface is greater than the width of the test piece;

[0007] A U-shaped groove for placing the nozzle is processed on the working surface along the width direction, the U-shaped groove has a groove width of 14.2 mm, a groove length greater than the width of the test piece, a groove depth of 17.1 mm, and a semicircular arc with a radius of R7.1 at the bottom of the groove;

[0008] A plurality of test piece clamping devices for clamping the test piece on the working surface are installed on the working surface;

[0009] During shot peening, the test piece is placed flat on the working surface, and the center line of the test piece in the length direction is flush with the center line of the U-shaped groove in the length direction. The test piece clamping device clamps the test piece on the working surface, and the nozzle reciprocates along the center line of the U-shaped groove in the length direction to perform shot peening.

[0010] The utility model processes a U-shaped groove with a groove width of 14.2mm on a working surface, and the groove length of the U-shaped groove is greater than the width of the test piece, the groove depth is 17.1mm, and the groove bottom is a semicircular arc with a radius of R7.1. In this way, when determining the shot peening intensity of a Φ13-Φ20 inner hole, the center line of the length direction of the test piece is directly aligned with the center line of the length direction of the U-shaped groove, so that a 14.2mm long portion in the middle of the test piece can be accurately reserved for shot peening, and the test piece can be quickly clamped by one person, and the operation is simple and fast.

[0011] Preferably, the length of the working surface is consistent with the length of the test piece, and the center line of the length direction of the U-shaped groove is aligned with the center line of the length direction of the working surface, so as to further facilitate the clamping and positioning of the test piece.

[0012] Preferably, the specimen clamping device is a pan head screw arranged in a 2*2 matrix on the working surface, and the center distance between two pan head screws distributed along the width direction of the substrate is 24.0-24.1 mm, and the center distance between two pan head screws distributed along the length direction of the substrate is 39.6-40.4 mm.

[0013] Preferably, when determining the shot peening intensity of any hole ΦX between Φ13-Φ20, the vertical distance between the outer circle of the nozzle and the working surface is (X-10) / 2mm.

[0014] Preferably, the substrate is made of CrWMn tool steel with a hardness of HRC61-66.

[0015] Compared with the prior art, the utility model has the following advantages: the utility model has a simple structure, the test piece can be installed and removed quickly and conveniently, the 14.2mm part in the middle of the test piece that needs shot peening is accurately reserved, and the other parts are well protected, and the device uses tool steel made of CrWMn material with a hardness of HRC61-66, which is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a three-dimensional diagram of an embodiment of a fixing block device for clamping an Almen N type shot peening test piece according to the utility model.

[0018] Figure 2 for Figure 1 A cross-sectional view of the test piece clamping device in the length direction.

[0019] Figure 3 Diagram of the test piece clamping and the position of the test piece and nozzle when determining the shot peening intensity of the Φ13 hole.

[0020] Figure 4 Part hole and nozzle position diagram for determining Φ13 hole shot peening intensity.

[0021] Figure 5 Diagram of the test piece clamping and the position of the test piece and nozzle when determining the Φ20 hole shot peening intensity.

[0022] Figure 6 Part hole and nozzle position diagram for determining Φ20 hole shot peening intensity.

[0023] In the figure: 1-U-shaped groove; 2-pan head screw; 3-test piece; 4-base; 5-nozzle; 6-threaded hole; 7-center line of the length direction of the U-shaped groove. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1As shown, the fixing block device for clamping the Almen N type shot peening test piece of the utility model selects a piece of CrWMn material tool steel, heat-treated to HRC61-66, and then processed into a 76.6 (length) × 40 (width) × 60 (height) rectangular parallelepiped base 4, and a U-shaped groove 1 is processed along the width direction on a 76.6 (length) × 40 (width) surface (i.e., the working surface) on it, the center line 7 in the length direction of the U-shaped groove is 38.3mm away from the two long sides of the 76.6 (length) × 40 (width) surface, the groove width is 14.2mm, the groove length is 40mm, the groove depth is 17.1mm, and the groove bottom is a semicircular arc with a radius of R7.1. Four M5×0.8 threaded holes 6 are processed on a 76.6 (length)×40 (width) surface with a U-shaped groove. The depth of the threaded holes 6 is 20 mm, and the four threaded holes 6 are distributed in two rows along the width direction of the surface. There are two threaded holes 6 in each row, and the centers of the two threaded holes 6 in each row are in the same straight line. The centers of the two threaded holes 6 in each column are in the same straight line. The center distance between the two threaded holes distributed along the width direction of the substrate is 24.0-24.1 mm (as specified in SAE J442 specifications), and the center distance between the two threaded holes distributed along the length direction of the substrate is 39.6-40.4 mm (as specified in SAE J442 specifications). Then, four M5×0.8 pan head screws 2 are installed on the four threaded holes 6. The four pan head screws 2 form the test piece clamping device of the utility model.

[0028] The process of the fixed block device for clamping the Almen N type shot peening test piece in the utility model for shot peening operation is:

[0029] 1. Ginseng Figure 2 , use a screwdriver to remove the four M5×0.8 pan head screws 2 on the test piece fixing block device base 4.

[0030] 2. Place the Almen N type test piece 3 flat on the work surface with the U-shaped groove 1, and place the test piece 3 between the four M5×0.8 threaded holes 6. The length of the test piece 3 is flush with that of the substrate 4 (see Figure 2 shown).

[0031] 3. Use a screwdriver to screw the four M5×0.8 pan head screws 2 into the M5×0.8 threaded holes 6 to fix the Almen N type test piece 3 on the base 4.

[0032] 4. Place the substrate 4 clamping the Almen N type test piece 3 on the workbench, make the 76.6 (length) × 40 (width) surface without the test piece 3 contact the workbench surface, and stick the substrate 4 on the workbench with strong 502 glue.

[0033] 5. Adjust the nozzle 5 so that the nozzle 5 is located on the center line 7 in the length direction of the U-shaped groove, and then adjust the height of the nozzle 5. When the shot peening intensity of the Φ13 hole is determined, the vertical distance between the outer circle of the nozzle 5 and the surface of the Almen N type test piece 3 clamped on the substrate 4 is 1.5mm. The nozzle 5 reciprocates along the length direction of the U-shaped groove 1 to shot peen the Almen N type test piece 3 (such as Figure 2 When determining the shot peening intensity of the Φ20 hole, the vertical distance between the outer circle of the nozzle 5 and the surface of the Almen N type test piece 3 clamped on the fixed block is 5 mm, and the nozzle reciprocates along the length direction of the U-shaped groove 1 to peen the Almen N type test piece 3 (as shown in FIG. Figure 3 When determining the shot peening intensity of any hole ΦX between Φ13-Φ20, the vertical distance between the outer circle of the nozzle 5 and the surface of the Almen N type test piece 3 clamped on the substrate 4 is adjusted to (X-10) / 2mm, and the nozzle is reciprocated along the length direction of the U-shaped groove 1 to shot peen the Almen N type test piece 3.

[0034] The working principle of the fixed block device for clamping the Almen N type shot peening test piece of the utility model is as follows: the length of the base 4 is consistent with the length of the Almen N type test piece 3, both of which are 76.6mm, and the center distance of the two rows of threaded holes distributed along the width direction (24.0-24.1mm) is greater than the width of the test piece (19.05mm), so that a test piece can be installed, and the Almen N type test piece 3 is placed on the working surface with the U-shaped groove and the threaded holes, and the length of the test piece 3 is flush with the length of the base 4, and the four pan head screws 2 are fastened. Since the middle part of the test piece 3 is at the U-shaped groove 1 of the base 4, and the 14.2mm width part of the U-shaped groove 1 is empty, the remaining parts are fastened to the working surface with the pan head screws 2, and are closely fitted to the working surface, and then a Φ10 nozzle 5 is used to reciprocate along the length direction of the U-shaped groove 1 for shot peening (such as Figure 2 , Figure 3 As shown). In this way, this device not only protects the two sides of the test piece 3, but also reserves a 14.2 mm long portion in the middle of the test piece 3, and can also perform shot peening on the test piece 3 at the same time, satisfying the functions of clamping, protecting and shot peening the Almen N type test piece when determining the shot peening intensity of the hole of Φ13-Φ20.

[0035] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. A fixing block device for clamping an Almen N type shot peening test piece, comprising a base body, characterized in that: The substrate has a working surface, the length of the working surface is greater than or equal to the length of the test piece, and the width of the working surface is greater than the width of the test piece; A U-shaped groove for placing the nozzle is processed on the working surface along the width direction, the U-shaped groove has a groove width of 14.2 mm, a groove length greater than the width of the test piece, a groove depth of 17.1 mm, and a semicircular arc with a radius of R7.1 at the bottom of the groove; A plurality of test piece clamping devices for clamping the test piece on the working surface are installed on the working surface; During shot peening, the test piece is placed flat on the working surface, and the center line of the test piece in the length direction is flush with the center line of the U-shaped groove in the length direction. The test piece clamping device clamps the test piece on the working surface, and the nozzle reciprocates along the center line of the U-shaped groove in the length direction to perform shot peening.

2. The fixing block device for clamping the Almen N type shot peening test piece according to claim 1, characterized in that: The length of the working surface is consistent with the length of the test piece, and the center line of the length direction of the U-shaped groove is aligned with the center line of the length direction of the working surface.

3. The fixing block device for clamping the Almen N type shot peening test piece according to claim 1, characterized in that: The specimen clamping device is a pan head screw arranged in a 2*2 matrix on the working surface, and the center distance between two pan head screws distributed along the width direction of the substrate is 24.0-24.1mm, and the center distance between two pan head screws distributed along the length direction of the substrate is 39.6-40.4mm.

4. The fixing block device for clamping the Almen N type shot peening test piece according to claim 1, characterized in that: When determining the shot peening intensity of any hole ΦX between Φ13-Φ20, the vertical distance between the outer circle of the nozzle and the working surface is (X-10) / 2mm.

5. The fixing block device for clamping the Almen N type shot peening test piece according to claim 1, characterized in that: The substrate is made of CrWMn tool steel with a hardness of HRC61-66.

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