Quick-change type drilling and milling mould for machining pump body

Abstract

The utility model discloses a quick-change type drilling and milling mould for machining a pump body. The quick-change type drilling and milling mould comprises a bottom plate, the supporting plate is vertically arranged on the upper surface of the bottom plate; the horizontal drilling and milling machine platform is fixedly mounted at the top of the supporting plate and is parallel to the bottom plate; at least two sets of pump body installation positioning units, each set of positioning units comprises two pump body supporting holes and two positioning holes, and suitable pump body type marks are engraved on the edges of the pump body supporting holes and the positioning holes; wherein the pump body supporting hole corresponds to a compression bolt hole of a pump body to be machined in position, and the two positioning holes correspond to positioning pin holes in the bottom of the pump body in position. A detachable pump body supporting assembly is arranged in the pump body supporting hole, a positioning pin with a pump body type engraved on the surface is inserted in the positioning hole, and a tension bolt is arranged at the lower end of the positioning pin. According to the scheme, on the premise that the machining precision is kept, perfect combination of multi-model rapid switching, high-precision positioning and low-cost maintenance is achieved, and the multi-model precise machining device is particularly suitable for a multi-variety and small-batch precise machining scene.

Description

Technical Field

[0001] This utility model belongs to the field of fuel injection pump body processing technology, and in particular relates to a quick-change drilling and milling jig for processing pump bodies. Background Technology

[0002] In the field of CNC machining of precision components such as fuel injection pump bodies, the design of the fixture system directly affects machining efficiency and production costs. In traditional machining processes, due to the structural differences between different pump body models, it is usually necessary to design and manufacture dedicated fixtures for each specific model. While these dedicated fixtures can guarantee positioning accuracy, they have significant drawbacks in actual production: First, in a multi-variety, small-batch production model, the repeated development of dedicated fixtures leads to a multiple increase in equipment costs; second, fixture changes require repeated disassembly and recalibration of the relative position between the fixture and the machining center, with each changeover taking tens of minutes, severely restricting the flexibility of the production line; third, the storage and management of dedicated fixtures consumes a large amount of space resources, increasing enterprise operating costs.

[0003] Comparative analysis of the structural features of multiple pump models revealed that, despite differences in external dimensions, the distribution patterns of the bottom clamping bolt holes and locating pin holes exhibit common characteristics. Specifically, all pump models employ a two-hole positioning principle, with standardized design specifications for the axial spacing of the locating pin holes, while the clamping bolt holes are arranged systematically around the positioning datum. This finding indicates that, theoretically, by constructing a modular fixture platform with multiple sets of standardized positioning structures, coupled with interchangeable positioning components, rapid switching between different pump models on a single fixture can be achieved. However, current technology lacks a fixture design that effectively accommodates the positioning needs of multiple models while avoiding redundant positioning calibrations, leaving companies constrained by the inherent limitations of traditional dedicated fixtures when addressing product iterations.

[0004] Therefore, there is an urgent need to develop a drilling and milling fixture with rapid changeover capability. Through structural innovation, technical bottlenecks such as multi-model compatible positioning, non-repetitive calibration and installation, and low-cost modular expansion can be solved to meet the dual requirements of modern intelligent manufacturing for processing flexibility and cost control. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a quick-change drilling and milling fixture for machining pump bodies.

[0006] This utility model is implemented as follows: a quick-change drilling and milling fixture for processing pump bodies, characterized by comprising: a base plate; a support plate vertically disposed on the upper surface of the base plate; a horizontal drilling and milling platform fixedly installed on the top of the support plate and disposed parallel to the base plate; at least two sets of pump body mounting and positioning units, each set of positioning units including two pump body support holes and two positioning holes, the edges of the pump body support holes and positioning holes being engraved with applicable pump body model markings; wherein the pump body support holes correspond to the positions of the clamping bolt holes of the pump body to be processed, and the two positioning holes correspond to the positions of the positioning pin holes at the bottom of the pump body; a detachable pump body support assembly is disposed in the pump body support holes, and a positioning pin with the pump body model engraved on its surface is inserted into the positioning holes, the lower end of the positioning pin being provided with a tensioning bolt.

[0007] More preferably, the pump body support assembly includes a vertically installed pump body fastening bolt that runs from bottom to top through a horizontal drilling and milling machine platform, with an adjustable-height pump body support sleeve fitted onto the bolt shank.

[0008] More preferably, the side wall of the pump body support sleeve is provided with set screws in the radial direction.

[0009] More preferably, a replaceable leveling shim set is provided between the pump body support sleeve and the contact end face of the horizontal drilling and milling machine platform.

[0010] More preferably, the top surface of the support plate is provided with an array of platform positioning holes, and the bottom of the horizontal drilling and milling machine platform is provided with a platform positioning pin, so as to realize the quick positioning and installation of the horizontal drilling and milling machine platform and the support plate through the positioning pin.

[0011] More preferably, the horizontal drilling and milling machine platform is provided with locking screws for locking the positioning pin.

[0012] The advantages and technical effects of this utility model are as follows: This technical solution, through innovative modular design and a precision positioning system, enables rapid changeover of different pump body processing fixtures, reducing changeover and fixture adjustment time and improving production efficiency. Its core technological innovations and technical effects are mainly reflected in the following aspects:

[0013] Multi-model rapid changeover system: Multiple standardized positioning units on a horizontal drilling and milling machine platform enable rapid switching between various pump body models using a single fixture. Model markings engraved on the edge of each positioning unit allow operators to visually identify the compatible hole positions, significantly reducing changeover errors. Compared to traditional dedicated fixtures, this design drastically shortens changeover time and improves production efficiency.

[0014] By setting adjustment shims, the height difference of the three support sleeve components can be precisely adjusted to accommodate the height difference of the three positioning planes on the pump body that are not in the same location.

[0015] Rapid positioning and installation system: A precision positioning system between the support plate and the horizontal drilling and milling machine platform, combined with a locking screw fastening design, achieves high-precision repeatable positioning. This design completely eliminates the need for coordinate recalibration after traditional fixture changes, significantly shortening platform changeover time.

[0016] Production cost and efficiency optimization: Modular design significantly improves the versatility of fixtures and reduces redundant development costs. Standardized interface design reduces the number of fixtures and storage space requirements on the production line. At the same time, the simplified operation design significantly reduces operational difficulty and training time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 Top view;

[0019] Figure 3 yes Figure 1 Side view;

[0020] Figure 4 This is a schematic diagram of the support plate structure;

[0021] Figure 5 It uses a state diagram;

[0022] Figure 6 This is a schematic diagram of a pump body assembly structure;

[0023] Figure 7 yes Figure 6 Top view.

[0024] 1. Base plate; 2. Support plate; 21. Platform positioning hole; 22. Platform positioning pin; 23. Locking screw; 3. Horizontal drilling and milling machine platform; 41. Pump body support hole; 42. Positioning hole; 43. Positioning pin; 44. Tensioning bolt; 5. Pump body support assembly; 51. Pump body fastening bolt; 52. Pump body support sleeve; 53. Limit screw; 6. Leveling shim set; 7. Pump body. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0026] Please see Figures 1 to 5A quick-change drilling and milling fixture for processing pump bodies includes: a base plate 1; a support plate 2 vertically disposed on the upper surface of the base plate, the support plate 2 having a T-shaped structure; a vertical combination structure of the base plate and the support plate, the base plate supporting the support plate to form a stable base; this structure realizes the overall rigidity improvement of the fixture, which can withstand the cutting vibration during drilling and milling; at the same time, it provides a standardized interface for the subsequent installation of modular components.

[0027] The horizontal milling machine platform 3 is fixedly installed on the top of the support plate and parallel to the base plate using fasteners. At least two sets of pump body mounting and positioning units are included, each containing three pump body support holes 41 and two positioning holes 42. The edges of the pump body support holes and positioning holes are marked with the applicable pump body model. The pump body support holes correspond to the clamping bolt holes of the pump body to be processed, and the two positioning holes correspond to the positioning pin holes at the bottom of the pump body. Through multiple sets of standardized hole designs, parallel compatible positioning of different pump body models 7 (EUP III pump body in this embodiment) is achieved (a single platform supports rapid switching between 3-5 models). The model markings on the edges allow operators to intuitively identify the matching hole positions, preventing model change errors.

[0028] A detachable pump body support assembly is provided inside the pump body support hole. The pump body support assembly includes a vertically installed pump body fastening bolt 51 that passes through the horizontal drilling and milling machine platform 3 from bottom to top. An adjustable-height pump body support sleeve 52 is fitted onto the bolt shank. More preferably, a limiting screw is provided on the side wall of the pump body support sleeve in the radial direction to prevent the bolt from falling off when not in operation.

[0029] A positioning pin 43 with the pump body model engraved on its surface is inserted into the positioning hole, and a tension bolt 44 is provided at the lower end of the positioning pin.

[0030] Preferably, a replaceable leveling shim set 6 is provided between the pump body support sleeve and the contact end face of the horizontal drilling and milling machine platform. By replacing the shims with different thicknesses, the positioning requirements of the three support surfaces of the pump body at different heights can be met, ensuring that the pump body is placed in a horizontal position.

[0031] More preferably, the top surface of the support plate 2 is provided with an array of platform positioning holes 21, and the bottom of the horizontal drilling and milling machine platform is provided with platform positioning pins 22, so as to realize the rapid positioning and installation of the horizontal drilling and milling machine platform through the platform positioning pins.

[0032] Please see Figure 6 and Figure 7 When machining another type of P7 pump body, if the support plate cannot be fixed by tightening bolts due to interference, locking screws 23 are provided on the horizontal drilling and milling machine platform along the direction of the vertical positioning pin to lock the positioning pin.

[0033] This solution successfully overcomes the rigid limitations of traditional dedicated fixtures through innovative modular positioning, dynamic precision compensation mechanisms, and a collaborative design of quick-connect interfaces. While maintaining machining accuracy, it achieves a perfect combination of rapid switching between multiple models, high-precision positioning, and low-cost maintenance. It is particularly suitable for precision machining scenarios involving multiple product types and small batches, demonstrating significant economic benefits and market potential.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick change drilling and milling jig for machining a pump body, characterized by, include: Base plate; A support plate vertically mounted on the upper surface of the base plate; A horizontal drilling and milling machine platform is fixedly installed on the top of the support plate and is set parallel to the base plate. At least two sets of pump body mounting positioning units are provided. Each positioning unit includes two pump body support holes and two positioning holes. The edges of the pump body support holes and positioning holes are marked with applicable pump body model markings. The pump body support hole corresponds to the clamping bolt hole of the pump body to be processed, and the two positioning holes correspond to the positioning pin hole at the bottom of the pump body. A detachable pump body support assembly is provided inside the pump body support hole, and a positioning pin with the pump body model engraved on the surface is inserted into the positioning hole. A tension bolt is provided at the lower end of the positioning pin.

2. The quick change drilling and milling jig for machining a pump body according to claim 1, characterized in that: The pump body support assembly includes a vertically installed pump body fastening bolt that runs from bottom to top through a horizontal drilling and milling machine platform, with an adjustable-height pump body support sleeve fitted onto the bolt shank.

3. The quick change drilling and milling jig for machining a pump body according to claim 2, characterized in that: Set screws are provided on the side wall of the pump body support sleeve in the radial direction.

4. The quick change drilling and milling jig for machining a pump body according to claim 2, characterized in that: A replaceable leveling shim set is provided between the pump body support sleeve and the contact end face of the horizontal drilling and milling machine platform.

5. The quick change drilling and milling jig for machining a pump body according to claim 2, characterized in that: The top surface of the support plate is provided with an array of platform positioning holes, and the bottom of the horizontal drilling and milling machine platform is provided with a platform positioning pin. The positioning pin enables the rapid positioning and installation of the horizontal drilling and milling machine platform and the support plate.

6. The quick change drilling and milling jig for machining a pump body according to claim 5, characterized in that: The horizontal drilling and milling machine platform is provided with locking screws along the direction of the vertical positioning pin.

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