Positioning tool for machining of workpiece with bent bottom face

Abstract

The utility model discloses a positioning tool for machining a workpiece with a bent bottom surface, which comprises a body, a cushion block I, a cushion block II and inclined iron, a top plate is arranged on one side of the body in the length direction, a vertical plate a is arranged on the other side of the body in the length direction, a connecting plate A is arranged on one side of the body in the width direction, and a vertical plate b is arranged on one side of the connecting plate far away from the body 1; a connecting plate B is arranged on the other side of the body in the width direction, and a vertical plate c is arranged on the side, away from the body, of the connecting plate B; a strip-shaped limiting block is arranged at the center of the bottom of the body in the length direction; on one side of the vertical plate a, an inclined iron is placed on the body; a cushion block I with a radian is placed on the connecting plate A, and a cushion block II with a radian is placed on the connecting plate B; the radian of the cushion block I is matched with the radian of one side of a workpiece, and the radian of the cushion block II is matched with the radian of the other side of the workpiece. According to the utility model, the clamping and processing difficulty of the primary spring seat is effectively solved, the alignment procedure is reduced, and the processing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a positioning tool for processing a curved bottom surface workpiece, belonging to the technical field of machinery. Background Art

[0002] With the rapid development of high-speed rail and subway industries, in order to ensure the processability and stability of bogie welding, bogie welding parts are constantly optimized, resulting in a large number of welded forgings with special shapes. It is difficult to ensure the size of the drawing by general milling, and the efficiency is low. There are also great difficulties in clamping during processing, especially the clamping and processing of a series of spring seats (inside and outside). The traditional clamping method is suitable for single-piece and small-batch products. The characteristics of railway products are large batches and complex shapes. The use of this clamping method increases the difficulty of clamping. The traditional processing method uses a 60mm thick billet, and the curved surface is milled by a CNC milling machine. The processing allowance is large, and the processing time and material utilization rate are low, resulting in increased processing costs. Therefore, the billet is changed to a 45mm thick bend, thereby reducing the processing cost. However, due to the curved bottom surface of the workpiece, it is impossible to perform effective clamping, which leads to great difficulty in processing. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a positioning tool for processing a curved bottom workpiece, which effectively solves the difficulty of clamping and processing a series of spring seats, reduces the alignment process, and improves processing efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a positioning tool for processing a curved bottom surface workpiece, comprising a main body, a cushion block I, a cushion block II and an inclined iron, wherein a top plate in a vertical direction is provided on one side of the main body in the length direction, a vertical plate a is provided on the other side of the main body in the length direction, a connecting plate A is provided on one side of the main body in the width direction, and a vertical plate b is provided on the side of the connecting plate away from the main body 1; a connecting plate B is provided on the other side of the main body in the width direction, and a vertical plate c is provided on the side of the connecting plate B away from the main body; the sizes of the connecting plate A and the vertical plate b are larger than the sizes of the connecting plate B and the vertical plate c, and two spaced bolts are threadedly connected on the vertical plates a, b and c, and a strip-shaped limit block is provided at the center of the bottom of the main body in the length direction; the top plate, the vertical plate a, the vertical plate b, the vertical plate c, the limit block, the connecting plate A, the connecting plate B and the main body are an integrated structure; on the side of the vertical plate a, an inclined iron is placed on the main body, and the inclination angle of the inclined iron is 50 º; a cushion block I with an arc is placed on the connecting plate A, and a cushion block II with an arc is placed on the connecting plate B; the arc of cushion block I matches the arc of one side of the workpiece, and the arc of cushion block II matches the arc of the other side of the workpiece.

[0005] The beneficial effects of the utility model are as follows: the utility model effectively solves the difficulty of clamping and processing a series of spring seats, and the use of the positioning tooling reduces the cost of manufacturing and processing; reduces the number of alignment procedures, reduces the probability of processing alignment errors, and improves processing efficiency; and is suitable for clamping and processing of large quantities of railway workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0007] Figure 1 It is a structural schematic diagram of the utility model.

[0008] Figure 2 yes Figure 1 Top view of the .

[0009] Figure 3 It is the front view of the main body of the utility model.

[0010] Figure 4 yes Figure 3 Top view of the .

[0011] Figure 5 yes Figure 4 Left view of .

[0012] Figure 6 It is a schematic diagram of the cushion block I of the utility model.

[0013] Figure 7 It is a schematic diagram of the cushion block II of the present utility model.

[0014] Figure 8 is a schematic diagram of the workpiece.

[0015] Fig. 9 yes Figure 8 A-A schematic diagram.

[0016] Numbers in the figure:

[0017] 1. Main body, 101. Top plate, 102. Vertical plate a, 103. Vertical plate b, 104. Vertical plate c, 105. Limit block, 106. Connecting plate A, 107. Connecting plate B, 2. Cushion block I, 3. Cushion block II, 4. Oblique iron, 5. Workpiece. DETAILED DESCRIPTION

[0018] like Figure 1As shown in FIG. 9, a positioning fixture for processing a workpiece with a curved bottom surface comprises a main body 1, a cushion block Ⅰ2, a cushion block Ⅱ3 and an inclined iron 4, wherein a top plate 101 in a vertical direction is provided on one side of the main body 1 in the length direction, a vertical plate a102 is provided on the other side of the main body 1 in the length direction, a connecting plate A106 is provided on one side of the main body 1 in the width direction, and a vertical plate b103 is provided on the side of the connecting plate 106 away from the main body 1; a connecting plate B107 is provided on the other side of the main body 1 in the width direction, and a vertical plate c104 is provided on the side of the connecting plate B107 away from the main body 1; the connecting plate A106 is provided on the other side of the main body 1 in the width direction, and a vertical plate c104 is provided on the side of the connecting plate B107 away from the main body 1; the connecting plate A106 is provided on the other side of the main body 1 in the width direction, and a vertical plate b103 is provided on the side of the connecting plate B107 away from the main body 1; the connecting plate A106 is provided on the other side of the main body 1 in the width direction, and a vertical plate c104 ... b103 is provided on the side of the connecting plate The dimensions of the upper plate 06 and the upper plate b103 are larger than those of the connecting plate B107 and the upper plate c104. Two spaced bolts are threadedly connected to the upper plates a102, b103 and c104. A strip-shaped limit block 105 is provided at the center of the length direction of the bottom of the body 1. The top plate 101, the upper plate a102, the upper plate b103, the upper plate c104, the limit block 105, the connecting plate A106 and the connecting plate B107 are an integrated structure with the body 1. On the side of the upper plate a102, an inclined iron 4 is placed on the body 1, and the inclination angle of the inclined iron 4 is 50 degrees. A curved pad Ⅰ2 is placed on the connecting plate A106, and a curved pad Ⅱ3 is placed on the connecting plate B107. The curvature of the pad Ⅰ2 matches the curvature of one side of the workpiece, and the curvature of the pad Ⅱ3 matches the curvature of the other side of the workpiece.

[0019] During use, according to the characteristics of the workpiece 5, during rough machining, general milling is used to machine a reference surface and a positioning surface for CNC milling, and the positioning surface must be perpendicular to the reference surface. During fine machining, the CNC milling machine adopts a fixture positioning clamping method for machining, which not only ensures the size and form and position tolerance requirements of the drawing, but also improves the machining efficiency; before the workpiece 5 is positioned on the fixture, the upper and lower planes and the left end face of the workpiece 5 are machined and sized by a common milling machine as a positioning reference; the fixture body 1 is first put on the workbench, and the body 1 is positioned with the workbench by the limit block 105 at its bottom; the workpiece 5 is placed in the body 1, and one end of the workpiece 5 in the length direction is against the top plate 101, and the top plate 101 is the positioning surface, and the bending at the other end of the workpiece 5 in the length direction The bottom surface is against the inclined iron 4, and the bolts on the vertical plate a102 tighten the inclined iron 4. The inclined iron 4 plays a supporting role, supporting the curved bottom surface of the workpiece 5. At the same time, the pressure plates at both ends of the workbench in the length direction fix the workpiece 5 by bolts, and the curvature of the two side surfaces in the width direction of the workpiece 5 is milled; after the processing is completed, the pads Ⅰ2 and Ⅱ3 are placed on both sides of the workpiece 5, and the pads Ⅰ2 and Ⅱ3 are matched and tightened by the bolts on the vertical plates b103 and c104 to clamp the workpiece 5, and the pressure plates at both ends of the workbench are removed, and the inner diameter and boss of the workpiece 5 are milled; there is another workpiece in the position of the bogie, and they are arranged symmetrically. When processing the workpiece 5 on the other side, it is only necessary to swap the positions of the pads Ⅰ2 and Ⅱ3.

[0020] The purpose of the utility model is to use the bottom surface and the left side surface of the workpiece 5 as the reference surface for processing, the curved surface as the auxiliary positioning surface, fix the curved surface by a positioning tool, adopt the positioning surface and the curved surface as auxiliary support, clamp the curved surfaces on both sides for clamping and positioning; according to the structural characteristics, during processing, only the tooling needs to be drawn, aligned and tightened, and the alignment process can be reduced when processing the workpiece 5, which greatly shortens the processing time and improves the work efficiency. It is fully capable of processing a workpiece 5 that meets the requirements of the drawings and technical conditions, and the processing efficiency can be improved by 2 to 3 times; according to the structure of different parts, the arc shape of the pads Ⅰ2 and Ⅱ3 is changed, and similar types of workpieces can be clamped.

Claims

1. A positioning tool for processing a workpiece with a curved bottom surface, characterized in that: It comprises a body (1), a cushion block I (2), a cushion block II (3) and an inclined iron (4); a vertical top plate (101) is provided on one side of the body (1) in the length direction, a vertical plate a (102) is provided on the other side of the body (1) in the length direction, a connecting plate A (106) is provided on one side of the body (1) in the width direction, and a vertical plate b (103) is provided on the side of the connecting plate A (106) away from the body (1); a connecting plate B (107) is provided on the other side of the body (1) in the width direction, and a vertical plate c (104) is provided on the side of the connecting plate B (107) away from the body (1); the vertical plates a (102), b (103) and c (104) are all threadedly connected with two spaced bolts, and a strip-shaped limit block (105) is provided at the center of the bottom of the body (1) in the length direction; On the side of the vertical plate a (102), an inclined iron (4) is placed on the main body (1); a curved pad I (2) is placed on the connecting plate A (106), and a curved pad II (3) is placed on the connecting plate B (107).

2. A positioning tool for processing a workpiece with a curved bottom surface according to claim 1, characterized in that: The dimensions of the connecting plate A (106) and the vertical plate b (103) are greater than the dimensions of the connecting plate B (107) and the vertical plate c (104).

3. The positioning tool for processing a workpiece with a curved bottom surface according to claim 1, characterized in that: The curvature of the cushion block I (2) matches the curvature of one side of the workpiece (5), and the curvature of the cushion block II (3) matches the curvature of the other side of the workpiece (5).

4. The positioning tool for processing a workpiece with a curved bottom surface according to claim 1, characterized in that: The inclined angle of the inclined iron (4) is 50°.

5. The positioning tool for processing a workpiece with a curved bottom surface according to claim 1, characterized in that: The top plate (101), the vertical plate a (102), the vertical plate b (103), the vertical plate c (104), the limit block (105), the connecting plate A (106), the connecting plate B (107) and the main body (1) are an integrated structure.

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