Device for testing hardness of cambered surface at R position of intake and exhaust rocker arm of diesel engine

Abstract

The utility model provides a diesel engine intake and exhaust rocker arm R-position cambered surface hardness testing device which comprises a base, an arc-shaped groove is formed in the top of the base, one end of the arc-shaped groove penetrates through one side of the top of the bottom, a semicircular clamping groove is formed in the side, away from the through part, of the arc-shaped groove, and a bolt hole is spirally formed in the side, parallel to the extending direction of the arc-shaped groove, of the base; the bolt holes are communicated with the portions, not provided with the semicircular clamping grooves, of the arc-shaped grooves, and compression bolts are arranged in the bolt holes. The arc-shaped groove is matched with the rocker arm part of the intake and exhaust rocker arm, the semicircular clamping groove is matched with the R position, after the intake and exhaust rocker arm is placed in the arc-shaped groove, the R position of the rocker arm is just clamped in the semicircular groove to be completely matched, the rocker arm is supported and stabilized, and a conical pressing head of a Rockwell hardness tester is matched to be pressed into the surface of the R position; therefore, the quenching hardness at the R position of the rocker arm is accurately tested, the unique method of only using a portable ultrasonic hardness meter for detection is eliminated, and the hardness detection precision and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mechanical property detection, in particular to a diesel engine intake and exhaust rocker arm R arc surface hardness detection device. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] Hardness detection is an important part of physical and chemical testing technology and is a control means for the internal quality of diesel engines. In the hardness detection of the diesel engine, the arc surface hardness at the R position of the intake and exhaust rocker arm is only detected by using an ultrasonic hardness tester, the detection method is single, and the accuracy is insufficient. SUMMARY

[0004] In order to solve the problems in the background art, the application provides a diesel engine intake and exhaust rocker arm R arc surface hardness detection device.

[0005] The application provides a diesel engine intake and exhaust rocker arm R arc surface hardness detection device, which comprises a base, wherein an arc-shaped groove is formed in the top of the base, one end of the arc-shaped groove penetrates the top of the base on one side, a semicircular clamping groove is arranged on the side away from the penetrating part of the arc-shaped groove, a bolt hole is spirally arranged on the side of the base parallel to the extension direction of the arc-shaped groove, the bolt hole is in communication with the part of the arc-shaped groove other than the semicircular clamping groove, a compression bolt is arranged in the bolt hole, the size of the arc-shaped groove is matched with the rocker arm part of the intake and exhaust rocker arm, and the semicircular clamping groove is matched with the R position of the intake rocker arm.

[0006] Preferably, the base is a cuboid.

[0007] Preferably, the material of the base is 40Cr round steel.

[0008] Preferably, the size of the base is 185 mm in length, 90 mm in width and 95 mm in height.

[0009] The width of the arc-shaped groove is 10 mm, the depth of the top is 20 mm, and the distance between the end of the arc-shaped groove and the side surface of the base is 15 mm.

[0010] The distance between the center of the semicircular clamping groove and the end of the arc-shaped groove is 30 mm, the diameter of the semicircular clamping groove is 12 mm, and the depth of the semicircular clamping groove is 14 mm.

[0011] Preferably, the roughness Ra of the semicircular clamping groove is less than or equal to 4 microns.

[0012] Compared with the prior art, the application has the following beneficial effects:

[0013] The arc-shaped slot of the application is matched with the rocker arm part of the intake and exhaust rocker arm, and the semicircular clamping slot is matched with R. After the intake and exhaust rocker arm is put into the arc-shaped slot, the R of the rocker arm is clamped in the semicircular slot, realizing the overall matching of the semicircular clamping slot and the R of the rocker arm. At the same time, the rocker arm is supported and stabilized. The conical indenter of the Rockwell hardness tester is pressed into the surface of R, so as to accurately test the quenching hardness of the R of the rocker arm, get rid of the only method of detecting the portable ultrasonic hardness tester, and improve the accuracy and accuracy of the hardness test. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of the present application serve to provide further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute improper limitations on the present application.

[0015] Fig. 1 is a top view of the overall structure of the present application,

[0016] Fig. 2 is a side view of the storage box structure of the present application.

[0017] In the drawings:

[0018] 1, compression bolt, 2, semicircular clamping slot, 3, arc-shaped slot, 4, base. DETAILED DESCRIPTION

[0019] The present application will be further described below in conjunction with the drawings and embodiments.

[0020] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0021] In the present disclosure, the terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the convenience of describing the structural relationship of the components or elements of the present disclosure, and cannot be understood as a limitation on the present disclosure.

[0022] Example 1

[0023] As Figs. 1-2As shown, the application provides a diesel engine intake and exhaust rocker arm R camber hardness testing device, comprising: a base 4, the top of the base 4 is provided with an arc-shaped groove 3, one end of the arc-shaped groove 3 penetrates the top of the bottom side, the side away from the penetration of the arc-shaped groove 3 is provided with a semicircular clamping groove 2, the side of the base 4 parallel to the extension direction of the arc-shaped groove 3 is provided with a bolt hole, the bolt hole is communicated with the part of the arc-shaped groove 3 except the semicircular clamping groove 2, a compression bolt 1 is arranged in the bolt hole, the size of the arc-shaped groove 3 is matched with the rocker arm part of the intake and exhaust rocker arm, and the semicircular clamping groove 2 is matched with the R part of the intake rocker arm.

[0024] The application makes the bottom camber of the intake and exhaust rocker arm tangent to the arc-shaped groove, and at the same time, the R part of the rocker arm is stably and firmly placed on the semicircular clamping groove, the conical indenter of the HR-150A Rockwell hardness tester is pressed into the surface, so that the quenching hardness of the R part of the rocker arm is accurately tested, and the only method of portable ultrasonic hardness tester is abandoned, and the internal quality of the intake and exhaust rocker arm of the company is comprehensively guaranteed.

[0025] The manufacturing process of the application is as follows:

[0026] In the steel warehouse, 40Cr round steel is selected, and is sawed into a cuboid with a length of 190 mm, a width of 100 mm and a height of 100 mm in a sawing machine. After heat treatment and quenching and tempering, it is processed into a cuboid with a length of 185 mm, a width of 90 mm and a height of 95 mm in a milling machine. On the end face of the rectangle, along the center line at a distance of 15 mm from one side, an arc-shaped groove 3 is milled according to the size of the bottom camber of the rocker arm part of the intake and exhaust rocker arm. The width of the arc-shaped groove is 10 mm, and the depth of the top is 20 mm. Then, a semicircular clamping groove 2 with a diameter of φ12 mm and a depth of 14 mm is processed on both sides of the upper part of the arc-shaped groove 3 at a position 30 mm away from the end of the arc-shaped groove 3. The roughness reaches Ra≤4 μm. A wire hole with a diameter of φ12 is processed on the surface of one side of the arc-shaped groove 3 by a drilling machine, and a compression bolt 1 with a diameter of φ12*50 is screwed.

[0027] The compression bolt 1 penetrates the arc-shaped groove and contacts the intake and exhaust rocker arm, and plays a role of compression and fixation on the intake and exhaust rocker arm, which is firm and reliable, and can guarantee the stability of the test. The diameter of the semicircular clamping groove 2 is φ12 mm, and the depth is 14 mm. After the intake and exhaust rocker arm is placed in the arc-shaped groove 3, the R part of the rocker arm is clamped in the semicircular clamping groove 2, and the semicircular clamping groove 2 and the R part of the rocker arm are fully matched. At the same time, the rocker arm is supported and stabilized. The bottom shape of the arc-shaped groove 3 is processed on the front half part of the intake and exhaust rocker arm, and the two can be well matched and fully support the rocker arm, so that the hardness test load is smoothly transmitted. The base 4 is the basic part of the whole testing device, and plays the role of stability, firmness and support.

[0028] Through a large number of field tests, the semi-circular clamping groove 2 of the application closely matches the R of the diesel engine intake and exhaust rocker arm and can fix it firmly and stably. According to the layout of the testing device, the physical and chemical testing principle and the hardness testing national standard, under the pressure of 150 Kg test load, the diamond cone indenter is pressed into the rocker arm R arc surface, the load is removed, and the test value is recorded through the pointer position on the scale.

[0029] The above is only the preferred embodiment of the application and is not used to limit the application. For those skilled in the art, the application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

[0030] Although the specific embodiments of the application are described above in combination with the drawings, it is not a limitation on the protection scope of the application. Those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the application without creative labor are still within the protection scope of the application.

Claims

1. A camber hardness inspection device for a diesel engine intake and exhaust rocker arm R, characterized by, The utility model relates to a diesel engine intake and exhaust rocker arm R place camber hardness inspection device, including: Base (4), the base (4) top is provided with arc slot (3), one end of arc slot (3) penetrates the top one side of bottom, and the side away from the penetration of arc slot (3) is provided with semicircle clamping groove (2), the side of base (4) parallel with the extension direction of arc slot (3) is provided with bolt hole spirally, the bolt hole is penetrated with the part of arc slot (3) not semicircle clamping groove (2), and the bolt hole is provided with compression bolt (1), the size of arc slot (3) is adapted with the rocker arm part of intake and exhaust rocker arm, and semicircle clamping groove (2) is adapted with R of intake rocker arm.

2. The diesel engine intake and exhaust rocker arm R place camber hardness inspection device according to claim 1, wherein: The base (4) is a rectangular parallelepiped.

3. The diesel engine intake and exhaust rocker arm R place camber hardness inspection device according to claim 2, wherein: The base (4) is made of 40Cr round steel.

4. The diesel engine intake and exhaust rocker arm R place camber hardness inspection device according to claim 2, wherein: The size of the base (4) is 185mm in length, 90mm in width and 95mm in height; The width of the arc slot (3) is 10mm, the top depth is 20mm, and the distance from the end of the arc slot (3) to the side surface of the base (4) is 15mm; The distance from the center of the semicircle clamping groove (2) to the end of the arc slot (3) is 30mm, the diameter of the semicircle clamping groove (2) is 12mm, and the depth is 14mm.

5. The diesel engine intake and exhaust rocker arm R place camber hardness inspection device according to any one of claims 1 or 4, wherein: The roughness Ra of the semicircle clamping groove (2) is less than or equal to 4μm.

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