Cylinder cover high-fitting-degree seat ring hole conical surface depth detection device

Abstract

The utility model discloses a cylinder cover high-fitting-degree race hole conical surface depth detection device, which relates to the technical field of engine part manufacturing, and comprises a cylinder cover body, a core rod is movably arranged in the cylinder cover body, a detection tool body is fixedly arranged at the top end of the core rod, a dial indicator is fixedly arranged at the side end part of the detection tool body, and the dial indicator is fixedly arranged on the cylinder cover body. A rhombic pin is fixedly installed at the bottom end of the testing fixture body, a base plate is arranged at the bottom end of the testing fixture body, the connecting end of a core rod and the testing fixture body can be tightly attached to the ring hole conical surfaces of an exhaust valve seat ring and an intake valve seat ring, the depth is measured, and the core rod of the measuring device is tightly matched with a pin hole through a screw installed on the base plate. The detection tool is locked and fixed through threads, the diamond pin and the dial indicator are installed on the detection tool body, the diamond pin and the core rod are matched with the exhaust valve seat ring and the intake valve seat ring, the rotation direction of the detection tool body is limited, and measurement deviation caused by the rotation angle is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engine parts manufacturing, in particular to a device for detecting the depth of a cone surface of a high-fitting seat ring hole of a cylinder head. Background Art

[0002] The cylinder head of an air-cooled diesel engine is a single-piece aluminum alloy casting with intake and exhaust ducts arranged inside. The valve seat ring and valve cooperate to form a closed space in the cylinder, and together with the piston and cylinder body, form a combustion chamber. Under the action of the valve train, the intake and exhaust valves are opened and closed regularly, allowing the diesel engine to operate under stable charging efficiency.

[0003] When the engine is working, the valve seat is subjected to extremely high-frequency impact loads and thermal loads. Its processing accuracy directly affects the engine's working performance. Therefore, there are strict requirements on the dimensions of the valve seat and the stop surface, and regular inspections are required. Conventional measurement methods are difficult to use, and the use of three-coordinate measurement in batch and continuous production cannot meet the production cycle requirements. This makes the operation more difficult and the inspection time longer. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a cylinder head high-fit seat ring hole cone depth detection device, which solves the difficulties that general conventional measurement methods are difficult to use and the use of three-coordinate measurement in batch and continuous production cannot meet the production rhythm requirements, resulting in increased difficulty in operation and long detection time.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A device for detecting the tapered depth of a cylinder head seat ring hole with high fit, comprising a cylinder head body, a core rod movably mounted inside the cylinder head body, a detection body fixedly mounted on the top end of the core rod, a dial indicator fixedly mounted on the side end of the detection body, and a diamond pin fixedly mounted on the bottom end of the detection body.

[0009] Preferably: two first cylindrical pins are fixedly installed on the bottom end of the inspection body, two screws are rotatably installed inside the pad, an exhaust valve seat ring is fixedly installed inside the cylinder head body, an intake valve seat ring is fixedly installed inside the cylinder head body, an intake valve guide is fixedly installed inside the intake valve seat ring, an exhaust valve guide is fixedly installed inside the exhaust valve seat ring, a pad is provided at the bottom end of the inspection body, and at least two second cylindrical pins are fixedly installed inside the pad.

[0010] (3) Beneficial effects

[0011] 1. By manually rotating the inspection body and reading the numerical changes of the dial indicator, the depth of the measured cone surface can be directly measured. In view of the different diameters of the exhaust valve seat ring and the intake valve seat ring, and the different installation depths of the intake and exhaust valve guides and the distances from the exhaust valve seat ring and the intake valve seat ring, corresponding core rods, diamond pins and calibration devices are respectively made. By repeating the operation and calibrating and zeroing the dial indicator according to the above method, they can be used to detect the cone surface depth of the exhaust valve seat ring and the intake valve seat ring respectively. The operation is simpler, the detection is convenient and fast, and the detection accuracy is increased.

[0012] 2. The connection end of the core rod and the inspection body can closely fit the cone surface of the exhaust valve seat ring and the intake valve seat ring to measure the depth. The core rod of the measuring device is tightly matched with the pin hole through the screw installed on the pad and fixed by thread locking. The diamond pin and dial indicator are installed on the inspection body. The diamond pin, core rod and exhaust valve seat ring and intake valve seat ring are matched to limit the rotation direction of the inspection body, which effectively avoids the measurement deviation caused by the rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0014] Figure 1 A detailed structural diagram of this utility model;

[0015] Figure 2 This is a structural diagram of the cylinder head of the utility model;

[0016] Figure 3 This is a schematic diagram of the detection and calibration of the utility model.

[0017] Legend: 11. Core rod; 12. First cylindrical pin; 13. Backing plate; 14. Second cylindrical pin; 15. Inspection base; 16. Diamond pin; 17. Dial indicator; 18. Screw; 19. Cylinder head body; 21. Exhaust valve seat; 22. Intake valve seat; 23. Intake valve guide; 24. Exhaust valve guide. DETAILED DESCRIPTION

[0018] The embodiment of the present application provides a device for detecting the conical surface depth of the cylinder head high-fit seat ring hole, which effectively solves the difficulties of general conventional measurement methods and the inability to meet the production rhythm requirements by using three-coordinate measurement in batch and continuous production, resulting in increased difficulty in operation and long detection time. By manually rotating the detection body and reading the numerical change of the dial indicator, the depth of the measured cone is directly measured. In view of the different diameters of the exhaust valve seat ring and the intake valve seat ring, and the different installation depths of the intake valve guide and the exhaust valve guide and the distance from the exhaust valve seat ring and the intake valve seat ring, corresponding core rods and diamond pins and calibration devices are respectively manufactured. By repeating the operation and calibrating and zeroing the dial indicator according to the above method, they are used for detecting the conical surface depths of the exhaust valve seat ring and the intake valve seat ring, respectively. The operation is simpler, the detection is convenient for rapid detection, and the accuracy of the detection is increased.

[0019] Example

[0020] like Figure 1 、 Figure 2 、 Figure 3 As shown, the technical solution in the embodiment of the present application effectively solves the difficulties of conventional measurement methods and the inability of three-coordinate measurement to meet the production rhythm requirements in batch and continuous production, resulting in increased difficulty in operation and long detection time. The overall idea is as follows:

[0021] In response to the problems existing in the prior art, the utility model provides a cylinder head high-fit seat ring hole conical depth detection device, comprising a cylinder head body 19, a core rod 11 movably installed inside the cylinder head body 19, a detection body 15 fixedly installed on the top end of the core rod 11, and a dial indicator 17 fixedly installed on the side end of the detection body 15. In view of the different diameters of the exhaust valve seat ring 21 and the intake valve seat ring 22, and the different installation depths of the intake valve guide 23 and the exhaust valve guide 24 and the different distances from the exhaust valve seat ring 21 and the intake valve seat ring 22, corresponding core rods 11 and diamond pins 16 and calibration devices are respectively manufactured. By repeating the operation and calibrating and zeroing the dial indicator 17 according to the above method, they are respectively used for detecting the conical depths of the exhaust valve seat ring 21 and the intake valve seat ring 22. The bottom end of the detection body 15 is fixedly installed with a diamond pin 16, and the bottom end of the detection body 15 is provided with a pad 13, and at least two second cylindrical pins 14 are fixedly installed inside the pad 13.

[0022] Two first cylindrical pins 12 are fixedly installed on the bottom end of the inspection body 15, two screws 18 are rotatably installed inside the pad 13, an exhaust valve seat ring 21 is fixedly installed inside the cylinder head body 19, and an intake valve seat ring 22 is fixedly installed inside the cylinder head body 19. The diameter size of the top end of the core rod 11 is consistent with the size of the measured conical surface at the depth from the stop, ensuring that the connecting end of the core rod 11 and the inspection body 15 can fit tightly with the cone surface of the ring hole of the exhaust valve seat ring 21 and the intake valve seat ring 22 to measure the depth. The intake valve guide 23 is fixedly installed inside the intake valve seat ring 22, and the exhaust valve guide 24 is fixedly installed inside the exhaust valve seat ring 21.

[0023] Working principle:

[0024] In the first step, the device is calibrated by first adjusting the dial indicator 17 to zero, replicating the stopper plane and cone depth requirements of the cylinder head body 19 on the calibration gauge, and calibrating and zeroing. Then, the lower part of the core rod 11 of the calibration zeroing device is inserted downward from the top of the exhaust valve seat ring 21 and the intake valve seat ring 22, and the end of the core rod 11 is inserted downward into the interior of the intake valve guide 23 or the exhaust valve guide 24. The diamond pin 16 is adjusted so that the gauge no longer rotates significantly around the core rod 11. By manually rotating the calibration body 15, the value change of the dial indicator 17 is read until the calibration zeroing device is zeroed. Then, the depth of the measured conical surface is measured. According to the different diameters of the exhaust valve seat ring 21 and the intake valve seat ring 22, and the different installation depths of the intake valve guide 23 and the exhaust valve guide 24 and the different distances from the exhaust valve seat ring 21 and the intake valve seat ring 22, corresponding core rods 11, diamond pins 16 and calibration devices are respectively manufactured. By repeating the operation and calibrating and zeroing the dial indicator 17 according to the above method, they are used to detect the depth of the conical surface of the exhaust valve seat ring 21 and the intake valve seat ring 22 respectively. The operation is simpler, the detection is convenient and fast, and the detection accuracy is increased.

[0025] In the second step, the lower part of the core rod 11 is precisely matched with the intake valve guide 23 and the exhaust valve guide 24 and used as a detection reference. The diameter of the top of the core rod 11 is consistent with the size of the measured cone surface from the stop, ensuring that the connecting end of the core rod 11 and the inspection body 15 can fit tightly with the cone surface of the exhaust valve seat ring 21 and the intake valve seat ring 22 to measure the depth. The core rod 11 of the measuring device is tightly matched with the pin hole through the screw 18 installed on the pad 13 and fixed by thread locking. The diamond pin 16 and the dial indicator 17 are installed on the inspection body 15. The diamond pin 16, the core rod 11 and the exhaust valve seat ring 21 and the intake valve seat ring 22 are matched to limit the rotation direction of the inspection body 15, effectively avoiding the measurement deviation caused by the rotation angle.

[0026] Finally, it should be noted that the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cylinder head high-fit seat ring hole tapered depth detection device, comprising a cylinder head body (19), characterized in that: A core rod (11) is movably installed inside the cylinder head body (19), a detection body (15) is fixedly installed on the top end of the core rod (11), a dial indicator (17) is fixedly installed on the side end of the detection body (15), and a diamond pin (16) is fixedly installed on the bottom end of the detection body (15).

2. A cylinder head high-fit seat ring hole tapered depth detection device according to claim 1, characterized in that: Two first cylindrical pins (12) are fixedly mounted on the bottom end of the inspection body (15).

3. A cylinder head high-fit seat ring hole tapered depth detection device according to claim 1, characterized in that: A pad (13) is provided at the bottom end of the inspection body (15).

4. A cylinder head high-fit seat ring hole tapered depth detection device as claimed in claim 1, characterized in that: An exhaust valve seat ring (21) is fixedly installed inside the cylinder head body (19), and an intake valve seat ring (22) is fixedly installed inside the cylinder head body (19).

5. A cylinder head high-fit seat ring hole tapered depth detection device as claimed in claim 4, characterized in that: An intake valve guide tube (23) is fixedly mounted inside the intake valve seat ring (22).

6. A cylinder head high-fit seat ring hole tapered depth detection device as claimed in claim 4, characterized in that: An exhaust valve guide tube (24) is fixedly mounted inside the exhaust valve seat ring (21).

7. A cylinder head high-fit seat ring hole tapered depth detection device as claimed in claim 3, characterized in that: Two screws (18) are rotatably mounted inside the backing plate (13).

8. The cylinder head high-fit seat ring hole tapered depth detection device according to claim 3, characterized in that: At least two second cylindrical pins (14) are fixedly installed inside the backing plate (13).

Images