Plunger seat positioning and drilling device
By designing a plunger seat positioning drilling device, and utilizing the threaded connection and interference fit of the base, drill jig sleeve, and guide sleeve, the problems of plunger seat oil passage position deviation and surface damage were solved, achieving efficient and precise machining results.
Patent Information
- Application Number
- CN202423021803.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In the existing technology, the machining position deviation of the oil passage hole of the plunger seat is large, the machining efficiency is low, and the surface is prone to damage or scratches.
Design a plunger seat positioning drilling device, including a base, a drill jig sleeve and a guide sleeve. Through threaded connection and interference fit, the drilling position accuracy and stability are ensured. The roughness of the contact surface between the drill jig sleeve and the plunger seat is controlled at Ra0.25, and the guide sleeve provides stability.
It improves the machining accuracy and efficiency of the oil passage hole in the plunger seat, avoids surface damage or scratches, and achieves efficient and precise drilling.
Smart Images
Figure CN223492121U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of tooling components, specifically relating to a plunger seat positioning drilling device. Background Technology
[0002] The plunger seat is a critical component in a hydraulic plunger pump, and its machining is difficult and requires high surface finish. According to the process requirements: first, the end face of the plunger seat is machined to ensure a flatness of 0.001 and a roughness Ra of 0.25; second, the oil passage hole on the end face of the plunger seat is machined, with its location at the center of the end face and a diameter of Φ0.6. During the machining of the oil passage hole, no pressure marks or scratches are allowed on other parts of the plunger seat.
[0003] The traditional method for machining the oil passage hole on the end face of the plunger seat involves clamping and fixing it in a bench vise, and then marking the end face to determine the drilling position. This machining method easily results in defects such as indentations and scratches on the plunger seat surface, significant positional deviations of the oil passage hole, and low machining efficiency. To ensure the positional accuracy and drilling stability of the oil passage hole in the plunger seat, improve machining efficiency, and eliminate abnormalities such as indentations or scratches on the plunger seat surface, a plunger seat positioning and drilling device needs to be designed to position and protect the plunger seat during drilling. Utility Model Content
[0004] The purpose of this invention is to provide a plunger seat positioning drilling device to ensure the machining position accuracy and drilling accuracy of the oil passage hole of the plunger seat, prevent scratches on the surface of the machined parts, and improve machining efficiency.
[0005] The present invention provides a plunger seat positioning drilling device, comprising a base, a drill jig sleeve, and a guide sleeve. The drill jig sleeve is threadedly connected to the base, the guide sleeve is press-fitted onto the drill jig sleeve, and the plunger seat is installed in the drill jig sleeve.
[0006] To ensure the drilling position accuracy of the plunger seat, control was implemented in the following two aspects: ΦA is the guide diameter of the contact surface between the drill jig and the base; ΦB is the diameter of the contact surface between the base and the drill jig (ΦB is ground to fit based on ΦA, requiring a clearance of no more than 0.02mm between ΦA and ΦB); ΦC is the diameter of the plunger seat mounting point in the drill jig, designed based on the plunger seat end face diameter, requiring a maximum clearance of 0.05~0.10mm when the plunger seat is installed in the drill jig. This design method ensures both the drilling position accuracy of the plunger seat and enables fast and accurate installation.
[0007] To ensure stability during the drilling process of the oil passage of the plunger seat, a detachable guide sleeve was designed. The guide sleeve is press-fitted onto the drill jig sleeve in an interference fit, which can achieve stability during the drilling process.
[0008] When designing the drill jig sleeve, in order to avoid abnormal conditions such as pressure marks or scratches on the surface of the plunger seat, the roughness of the contact position between the drill jig sleeve and the end face of the plunger seat is Ra0.25, and the roughness of other contact surfaces between the drill jig sleeve and the plunger seat is Ra0.8.
[0009] The beneficial effects of this utility model are as follows: the machining process of the plunger seat positioning hole has been optimized, and a threaded base and drill jig sleeve are designed. The plunger seat is installed in the drill jig sleeve, and the base and drill jig sleeve are connected by threads. The plunger seat positioning drilling device is a high-efficiency, precise, and reliable tooling component that can improve the machining accuracy and efficiency of the plunger seat oil passage hole. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the plunger seat positioning drilling device of this utility model;
[0011] Figure 2 This is a schematic diagram of the drill jig sleeve;
[0012] Figure 3 This is a schematic diagram of the base;
[0013] The labels in the attached diagram are as follows: 1-base, 2-drill jig sleeve, 3-guide sleeve; 100-plunger seat. Detailed Implementation
[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0015] like Figure 1-3 As shown, a plunger seat positioning drilling device includes a base 1, a drill jig 2, and a guide sleeve 3. The drill jig 2 is threadedly connected to the base 1, and the guide sleeve 3 is press-fitted onto the drill jig 2. The wear clearance between the guide diameter ΦA of the drill jig's contact surface with the base and the diameter ΦB of the base's contact surface with the drill jig is no greater than 0.02 mm. The diameter ΦC of the plunger seat mounting location in the drill jig is designed according to the size of the plunger seat end face diameter, and the maximum fit clearance when the plunger seat is installed in the drill jig is 0.05 to 0.10 mm.
[0016] The surface roughness of the contact area between the drill jig sleeve and the plunger seat end face is Ra0.25, and the surface roughness of the other contact surfaces between the drill jig sleeve and the plunger seat is Ra0.8.
[0017] In the above embodiment, the drill jig sleeve 2 with the guide sleeve 3 is unscrewed from the base 1, the plunger seat is installed in the drill jig sleeve 2 and screwed into the thread of the drill jig sleeve 2 to ensure that the plunger seat does not move between the base 1 and the drill jig sleeve 2. The plunger seat positioning drilling device with the plunger seat installed is then placed on a drilling machine for drilling.
[0018] The use of this new plunger seat positioning drilling device ensures the machining position accuracy and drilling stability of the oil passage hole of the plunger seat, improves machining efficiency, and effectively avoids abnormal conditions such as pressure marks or scratches on the surface of the plunger seat.
Claims
1. A plunger seat positioning drilling device, characterized in that: It includes a base, a drill jig sleeve, and a guide sleeve; the guide sleeve is press-fitted onto the drill jig sleeve, the base is threadedly connected to the drill jig sleeve, and a plunger seat is installed into the drill jig sleeve. The wear gap between the guide diameter ΦA on the contact surface of the drill jig sleeve and the diameter ΦB on the contact surface of the drill jig sleeve on the base is no greater than 0.02mm; The diameter ΦC of the plunger seat installation point in the drill jig is designed according to the diameter of the plunger seat end face. The maximum fit clearance when the plunger seat is installed in the drill jig is 0.05 to 0.
10.
2. The plunger seat positioning drilling device according to claim 1, characterized in that: The guide sleeve is detachable and is press-fitted onto the drill jig sleeve in an interference fit.
3. The plunger seat positioning drilling device according to claim 1, characterized in that: The surface roughness of the contact area between the drill jig sleeve and the plunger seat end face is Ra0.25, and the surface roughness of the other contact surfaces between the drill jig sleeve and the plunger seat is Ra0.8.