Positioning device for machining journal parts

Abstract

The utility model relates to a positioning device for machining, in particular to a positioning device for machining journal parts, which comprises a base plate arranged on a table top of a machine tool; a connecting rod is arranged in the center of the chassis; the shaft neck fixing unit comprises a core shaft which is fixed on the connecting rod; a long threaded hole is formed in the mandrel, and a long screw rod is in threaded connection with the interior of the long threaded hole; the pressing cap is rotationally fixed at the tail end of the long screw rod; the section of the positioning ring is in an L shape to form a spigot, and the edge of the rotating disc of the journal part is located on the horizontal table face of the spigot to be fixed; the outer side of the edge of the turntable is limited and fixed through a pressing plate; and the pressing plate is fixed on the chassis through a screw and is used for pressing and fixing the turntable of the journal part. According to the machining positioning device, journal parts can be rapidly installed and positioned, and meanwhile the machining precision of the parts can be guaranteed.

Description

Technical Field

[0001] This utility model relates to a positioning device for machining, and in particular to a positioning device for machining journal-type parts. Background Technology

[0002] Journal-type parts have extremely strict requirements for dimensional and positional accuracy. Due to their special structure, they are difficult to clamp on machine tools and cannot be machined using radial clamping. Furthermore, the journal section is susceptible to chattering caused by machining cutting forces, which affects the machining quality. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a device capable of quickly positioning and installing journal-type parts while preventing machining vibration, thus solving the aforementioned issues. Specifically, it is a positioning device for machining journal-type parts, comprising:

[0004] A chassis is mounted on the machine tool table; a connecting rod is located at the center of the chassis, and a spindle is fixed to the upper end of the connecting rod.

[0005] The journal fixing unit includes a spindle, which is fixed on a connecting rod; the spindle is provided with a long threaded hole, and a long screw is internally threaded into the long threaded hole; it also includes a pressure cap, which is rotatably fixed to the tail end of the long screw.

[0006] The positioning ring has an L-shaped cross-section forming a stop annular groove. The turntable edge of the journal-type part is fixed on the horizontal platform surface of the stop annular groove. The outer side of the turntable edge is further limited and fixed by a pressure plate.

[0007] The pressure plate, fixed to the chassis with screws, presses and secures the turntable of the journal component.

[0008] Furthermore, when fixing the journal, a shim is provided between the part and the pressure cap.

[0009] Furthermore, the chassis has multiple large through holes, which helps to reduce weight.

[0010] The machining positioning device provided by this utility model can quickly install and position journal-type parts while ensuring the machining accuracy of the parts. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the positioning ring structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the usage state of this utility model. Detailed Implementation

[0014] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0015] refer to Figure 1-3 This utility model provides a positioning device for machining journal-type parts, comprising,

[0016] The chassis 1 is mounted on the machine tool table; a connecting rod 2 is located at the center of the chassis.

[0017] The journal fixing unit includes a spindle 3, which is fixed on the connecting rod 2; the spindle 3 is provided with a long threaded hole, and a long screw 4 is internally threaded into the long threaded hole; it also includes a tightening cap 6, which is fixed to the tail end of the long screw 4.

[0018] The positioning ring 9 has an L-shaped cross-section, forming a stop annular groove. It is used to fix the edge of the turntable of journal-type parts, specifically, the edge of the turntable is located on the horizontal platform surface of the stop; the outer side of the turntable edge is limited and fixed by the pressure plate 7.

[0019] The pressure plate 7 is fixed to the chassis 1 by screws and nuts 8, and presses and fixes the turntable of the journal component.

[0020] As an improvement to the design, when fixing the journal, a shim 7 is provided between part 10 and the pressure cap to prevent wear on the journal diameter during tightening.

[0021] As an improvement to the design, the chassis has multiple large through holes, which helps to reduce weight.

[0022] In use, place the chassis 1 on the machine tool table, place the part in the annular groove of the inner stop of the positioning ring 9, and the mandrel 3 passes through the journal section of the part and mates with the inner diameter of the journal. Install the long screw 4, the washer 5, and the pressure cap 6 in sequence and tighten them to press the journal structure. The support of the mandrel 3 makes the part clamping more stable and avoids machining vibration; the inner stop of the positioning ring 9 and the mandrel 3 together ensure that the journal part and the fixture are coaxial. At the same time, the positioning reference of the positioning device matches the design reference of the part.

[0023] Next, install the pressure plate 7 and the nut 8 to axially press the part's wheel structure. Use the alignment belt on the outer diameter side of the part's base to align the positioning device on the machine tool, ensuring that the part, positioning device, and machine tool rotation center are at the same center.

[0024] Furthermore, the positioning ring 9 and the mandrel 3 can be replaced with components of other sizes to accommodate the machining of journal-type parts of different sizes. After replacement, the inner stop of the positioning ring 9 and the outer diameter of the mandrel 3 need to be machined together to ensure the accuracy of the positioning device.

[0025] 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, improvements, etc., 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 positioning device for machining of a journal type part, characterized in that, The utility model relates to a centering device for shaft neck parts, comprising a base plate arranged on a machine tool table, a connecting rod arranged at the center of the base plate, a shaft neck fixing unit comprising a mandrel fixed on the connecting rod, a long threaded hole arranged on the mandrel, a long screw threadedly connected in the long threaded hole, a pressing cap rotatably fixed at the tail end of the long screw, a positioning ring with an L-shaped cross section forming a stopper, the edge of a rotating disc of a shaft neck part being fixed on the water platform surface of the stopper, the outer side of the rotating disc edge being fixed by a pressing plate, and the pressing plate being fixed on the base plate by screws to press and fix the rotating disc of the shaft neck part. A gasket is arranged between the part and the pressing cap during fixing. The base plate has a plurality of large through holes. ​ ​ 2. The positioning device for machining of a journal type part according to claim 1, characterized in that, ​ 3. The positioning device for machining of a journal type part according to claim 1, characterized in that, ​

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