Machining positioning device for simultaneously positioning two connecting rod necks of pump crankshaft

Abstract

The utility model relates to a machining and positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft, and belongs to the field of machining and positioning tools. A machining platform is fixed to a connecting plate, and a two-way synchronous dovetail sliding table and a pair of inclined wedge positioning plates are fixed to the middle of the connecting plate. The two sliding tables which move synchronously of the bidirectional synchronous dovetail sliding table drive the pair of inclined wedge positioning plates to move synchronously, so that the inclined planes of the inclined wedge positioning plates are in contact with two connecting rod necks of the pump crankshaft respectively, and the two connecting rod necks are positioned simultaneously. After the pump shaft connecting rod necks are roughly machined, the two connecting rod necks can be rapidly and accurately positioned at the same time, the application range is wide, operation is simple and convenient, and the positioning precision is improved. The two connecting rod necks of the pump crankshaft are positioned at the same time, the positioning precision is high, the product quality of machined workpieces is fully guaranteed, the waste product generation rate of products in the machining process is reduced, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a processing positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft, belonging to the field of processing positioning tooling. Background Art

[0002] In the field of mechanical processing, the rough machining of the pump shaft connecting rod neck mainly relies on CNC connecting rod neck milling machines and their large disc cutter milling technology. However, due to the large number of milling blades, the uneven installation and wear result in uneven knife marks on the surface of the connecting rod neck, which in turn forms an uneven surface. In the subsequent processing link, if the positioning block is used to support and position the rough-machined connecting rod neck surface, the positioning may be inaccurate due to errors. In order to correct such errors, the diameter of the connecting rod neck at the positioning position must be measured before positioning, and the drop between it and the outer circle must be calculated. Subsequently, the actual drop is measured using a height gauge, and the drop of the connecting rod neck is adjusted to the theoretical value by repeatedly using a crowbar to pry the workpiece. Finally, a copper sheet of appropriate thickness is selected and placed on the positioning block to ensure that the workpiece is tightened. This positioning process is quite cumbersome and time-consuming. This process not only requires high-precision measuring tools, but also requires the operator to have rich experience and skills. Despite this, due to human factors and measurement errors, it is still difficult to ensure that every processing can achieve the desired effect. Utility Model Content

[0003] The utility model solves the problems existing in the above-mentioned prior art and provides a processing positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft. The utility model can quickly and accurately simultaneously position the two connecting rod necks after the pump shaft connecting rod necks are roughly processed. The utility model has a wide range of applications, is simple and convenient to operate, and improves positioning accuracy. The utility model simultaneously positions the two connecting rod necks of the pump crankshaft, has high positioning accuracy, fully guarantees the product quality of the processed workpiece, reduces the scrap rate of the product during processing, and thus reduces production costs.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a processing positioning device for simultaneously positioning the two connecting rod necks of a pump crankshaft, comprising at least a bevel positioning plate, the positioning device consisting of a connecting plate, a bidirectional synchronous dovetail slide and a pair of bevel positioning plates, the connecting plate being a horizontal plate matching the size of the pump crankshaft, the bottom of the connecting plate matching the working platform, a bidirectional synchronous dovetail slide being provided in the middle of the connecting plate, so that the guide rail of the bidirectional synchronous dovetail slide is in the same axial direction as the pump crankshaft, a pair of bevel positioning plates being detachably fixed on the bidirectional synchronous dovetail slide, wherein the bevel positioning plates comprise a left bevel positioning plate and a right bevel positioning plate, the left bevel positioning plate and the right bevel positioning plate are respectively fixed on the two slides, so that the inclined surfaces of the left bevel positioning plate and the right bevel positioning plate are respectively in contact with the two connecting rod necks of the pump crankshaft.

[0005] The bidirectional synchronous dovetail slide is provided with an adjustment mechanism, which is a gear rack feed mechanism or a matching feed screw. The adjustment mechanism drives the two slides to move synchronously through a hand wheel.

[0006] There are lifting holes at both ends of the connecting plate to facilitate the installation and disassembly of the device on the working platform.

[0007] The inclined wedge positioning plate is fixed on the slide table by bolts. The inclined wedge positioning plate of corresponding height is replaced according to different specifications of pump crankshafts, so that the device can adapt to the connecting rod neck sizes of pump crankshafts of different sizes.

[0008] The bidirectional synchronous dovetail slide is equipped with a safety locking device to prevent the slide from moving due to unexpected circumstances during processing, ensuring processing safety.

[0009] According to the above technical solution, the processing positioning device provided by the utility model for simultaneously positioning the two connecting rod necks of the pump crankshaft is fixed to the connecting plate through the processing platform, and a bidirectional synchronous dovetail slide and a pair of inclined wedge positioning plates are fixed in the middle of the connecting plate. The two synchronously moving slides of the bidirectional synchronous dovetail slide drive a pair of inclined wedge positioning plates to move synchronously, so that the inclined surfaces of the inclined wedge positioning plates contact the two connecting rod necks of the pump crankshaft respectively, thereby realizing the simultaneous positioning of the two connecting rod necks. Compared with the prior art, the utility model has the following advantages:

[0010] (1) Because the technical solution adopted by the utility model realizes synchronous bidirectional movement through the combination of a bidirectional synchronous dovetail slide and a pair of inclined wedge positioning plates, so as to achieve the purpose of simultaneously positioning two connecting rods while rotating the workpiece, the utility model can be used to locate the rough-machined connecting rod surface of the pump shaft, ensure that the phase angle between the pin hole and each connecting rod after positioning processing is qualified and centered, and eliminate the error and cumbersome operation caused by the unevenness of the traditional positioning of a rough-machined connecting rod neck surface.

[0011] (2) Because the technical solution adopted by the utility model is to position the connecting rod neck by means of an inclined surface, a pair of inclined wedge positioning plates are detachably fixed on two slides by bolts, and the inclined wedge positioning plates of corresponding heights are replaced according to the diameter size of the connecting rod neck. Therefore, the utility model can meet the positioning requirements of the connecting rod neck with a relatively small difference in diameter size without the need for adjustment. In the case of a large difference in diameter size, convenient and efficient positioning can be achieved by replacing the inclined wedge positioning plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The overall structure front view of the positioning device;

[0013] Figure 2 Side view of the positioning device.

[0014] In the figure: 1, connecting plate; 2, bidirectional synchronous dovetail slide; 21, hand wheel; 3, left oblique wedge positioning plate; 4, right oblique wedge positioning plate; 5, pump crankshaft; 51, connecting rod neck. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0016] In the technical solution provided by the utility model, a processing positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft is provided, such as Figure 1 As shown, it at least includes a bevel positioning plate. The positioning device consists of a connecting plate 1, a bidirectional synchronous dovetail slide 2 and a pair of bevel positioning plates. The connecting plate 1 is a horizontal plate that matches the size of the pump crankshaft 5. The bottom of the connecting plate 1 matches the working platform. Lifting holes are provided at both ends of the connecting plate 1 to facilitate the installation and disassembly of the device on the working platform.

[0017] A bidirectional synchronous dovetail slide 2 is provided in the middle of the connecting plate 1, so that the guide rail of the bidirectional synchronous dovetail slide 2 is in the same axial direction as the pump crankshaft 5. An adjustment mechanism is provided on the bidirectional synchronous dovetail slide 2, and the adjustment mechanism is a gear rack feed mechanism or a matching feed screw. The adjustment mechanism drives the two slides to move synchronously through the hand wheel 21. The bidirectional synchronous dovetail slide 2 is provided with a safety locking device to prevent the slide from moving due to unexpected circumstances during the processing, thereby ensuring processing safety.

[0018] A pair of inclined wedge positioning plates are detachably fixed on the bidirectional synchronous dovetail slide 2, such as Figure 2 As shown, the inclined wedge positioning plate includes a left inclined wedge positioning plate 3 and a right inclined wedge positioning plate 4, which are respectively fixed on two slides, so that the inclined surfaces of the left inclined wedge positioning plate 3 and the right inclined wedge positioning plate 4 are respectively in contact with the two connecting rod necks 51 of the pump crankshaft 5. The inclined wedge positioning plate is fixed on the slide by bolts, and the inclined wedge positioning plate of the corresponding height is replaced according to the pump crankshaft 5 of different specifications, so that the device can adapt to the connecting rod necks 51 of the pump crankshaft 5 of different sizes.

[0019] When the device is used, clean butter is evenly applied on the two inclined surfaces of a pair of inclined wedge positioning plates for positioning before clamping the workpiece, so that the workpiece can be rotated when the two connecting rod necks 51 are positioned. When clamping the workpiece, the connecting rods of the two connecting rod necks 51 in the middle of the pump crankshaft 5 are roughly kept horizontal. After the workpiece falls on the inclined wedge positioning plate, the hand wheel 21 of the two-way synchronous dovetail slide 2 is manually cranked to achieve synchronous retraction of the left inclined wedge positioning plate 3 and the right inclined wedge positioning plate 4. The inclined surface of the inclined wedge first contacts and supports the surface of one connecting rod neck 51, and the hand wheel 21 is continuously cranked to rotate the workpiece until the left inclined wedge positioning plate 3 and the right inclined wedge positioning plate 4 contact the corresponding connecting rod neck 51 surface at the same time. The purpose of simultaneously positioning the surfaces of the two connecting rod necks 51 is achieved. If the size difference of the connecting rod neck 51 is too large, you can also choose to replace the inclined wedge positioning plate of the corresponding height to ensure that the phase angle between the pin hole and each connecting rod after positioning processing is qualified and evenly divided, thereby eliminating the error caused by the uneven surface of the rough-processed connecting rod neck 51 in traditional positioning.

Claims

1. A machining positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft, comprising at least a bevel positioning plate, characterized in that: The positioning device consists of a connecting plate, a bidirectional synchronous dovetail slide and a pair of inclined wedge positioning plates. The connecting plate is a horizontal plate that matches the size of the pump crankshaft. The bottom of the connecting plate matches the working platform. A bidirectional synchronous dovetail slide is provided in the middle of the connecting plate so that the guide rail of the bidirectional synchronous dovetail slide is in the same axial direction as the pump crankshaft. A pair of inclined wedge positioning plates are detachably fixed on the bidirectional synchronous dovetail slide, wherein the inclined wedge positioning plates include a left inclined wedge positioning plate and a right inclined wedge positioning plate. The left inclined wedge positioning plate and the right inclined wedge positioning plate are respectively fixed on the two slides so that the inclined surfaces of the left inclined wedge positioning plate and the right inclined wedge positioning plate are respectively in contact with the two connecting rod necks of the pump crankshaft.

2. The processing and positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft according to claim 1, characterized in that: The bidirectional synchronous dovetail slide is provided with an adjustment mechanism, which is a gear rack feed mechanism or a matching feed screw. The adjustment mechanism drives the two slides to move synchronously through a hand wheel.

3. The processing and positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft according to claim 1, characterized in that: There are lifting holes at both ends of the connecting plate to facilitate the installation and disassembly of the device on the working platform.

4. The processing and positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft according to claim 1, characterized in that: The inclined wedge positioning plate is fixed on the slide table by bolts. The inclined wedge positioning plate of corresponding height is replaced according to different specifications of pump crankshafts, so that the device can adapt to the connecting rod neck sizes of pump crankshafts of different sizes.

5. The machining and positioning device for simultaneously positioning two connecting rod necks of a pump crankshaft according to claim 1, characterized in that: The bidirectional synchronous dovetail slide is equipped with a safety locking device to prevent the slide from moving due to unexpected circumstances during processing, ensuring processing safety.

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