A rotary arm horizontal machining tool

Abstract

This utility model relates to a machining fixture for a rotating arm, comprising a base plate, a main support block, an angular positioning block, and a pressure plate. The main support block is fastened to the upper surface of the base plate, and a positioning post is fixedly connected to the center of its upper end face; the angular positioning block is fastened to the upper surface of the base plate, and a limit groove is formed on its upper end face; the pressure plate is located on both sides of the first end arm and is detachably connected to the base plate. This utility model solves the technical problem of repeated positioning and complex positioning process in traditional machining processes by cooperating the positioning post and positioning hole, and the limit strip and limit groove. It realizes rapid clamping and precise positioning of the rotating arm, simplifies the machining process, improves positioning accuracy, and ensures the machining quality and production efficiency of the rotating arm.

Description

Technical Field

[0001] This utility model relates to the field of machining, and more specifically to a rotary arm horizontal machining tool. Background Technology

[0002] In existing technologies, the swing arm is a key component of the variable gauge axle box device. These components are mostly complex in shape, heavy, require high precision, and have stringent quality standards. The high demands on material properties further exacerbate the need for structural precision, thus requiring high geometric accuracy for each individual component. Because it uses low-temperature resistant ductile iron material QT400-18, it is highly susceptible to deformation under cutting and clamping forces during machining. Therefore, the tooling design during machining is crucial for ensuring dimensional accuracy and eliminating the impact of deformation on the workpiece's geometry, and it is also one of the challenges in tooling design.

[0003] To improve production efficiency, reduce product costs, and ensure product dimensional accuracy, the design of the rotary arm uses the previous machining surface as the machining datum for this sequence, determining the horizontal and angular dimensions. Traditional machining processes, which initially determine the datum for each individual piece, suffer from varying spatial dimensional coordinates due to different product placement positions each time production begins. This method demands high operator skill, and uncertainties such as alignment accuracy and clamping force pose significant risks to workpiece quality stability, resulting in a high defect rate and low processing efficiency.

[0004] Therefore, how to provide a new horizontal machining fixture for rotating arms that can both clamp and fix the rotating arm and quickly position it is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a rotary arm horizontal machining tooling, which aims to solve the technical problem that the above-mentioned traditional machining process requires repeated positioning and the positioning process is complicated.

[0006] A horizontal machining fixture for clamping a rotary arm includes a rotary arm body and a first end arm and a second end arm located on both sides of the rotary arm body. A positioning hole is provided at the bottom end of the rotary arm body, and a limit block is fixed to the bottom surface of the first end arm. The fixture includes:

[0007] Base plate;

[0008] The main support block is fastened to the upper surface of the base plate. The upper end of the main support block contacts and abuts against the lower end of the swing arm body. A positioning post is fixedly connected to the center of the upper end of the main support block, and the cylindrical surface of the positioning post is positioned and matched with the positioning hole.

[0009] An angular positioning block is fastened to the upper surface of the base plate. The upper end surface of the angular positioning block is provided with a limiting groove that corresponds to and is adapted to engage with the limiting strip.

[0010] The pressure plate has its lower surface in contact with the upper surface of the first end arm. The pressure plate is located on both sides of the first end arm and is detachably connected to the base plate.

[0011] Through the above technical solution, this utility model limits the horizontal position of the rotating arm by contacting and abutting the lower end face of the rotating arm body with the upper end face of the main support block; then, the positioning pin and positioning hole are used for positioning and matching, and the limiting strip is positioned by the angular positioning block, thereby positioning the length direction of the rotating arm, and thus positioning all degrees of freedom of the rotating arm except for the height direction. Finally, the clamping of the pressure plate is used to completely fix the rotating arm on the processing fixture. In the process of feeding multiple rotating arms, only simple adjustment and clamping are required to clamp the rotating arms, which has the characteristics of simplifying the processing process and high positioning accuracy.

[0012] Preferably, the upper surface of the base plate is provided with positioning groove one and positioning groove two. The main support block is fastened to positioning groove one, and its side wall is in contact with the side wall of positioning groove one. The angular positioning block is fastened to positioning groove two, and its side wall is in contact with the side wall of positioning groove two.

[0013] Preferably, it also includes an auxiliary support block. The lower surface of the end of the second end arm is a plane. The auxiliary support block supports the lower surface of the end of the second end arm and is fastened to the base plate.

[0014] Preferably, the upper surface of the base plate is provided with a positioning groove three, the auxiliary support block is fastened to the positioning groove three, and its side wall is in contact with the side wall of the positioning groove three.

[0015] Preferably, it also includes a support bolt, a threaded hole is provided on the upper end face of the auxiliary support block, the stud of the support bolt is screwed to the threaded hole, and the nut of the support bolt supports the lower surface of the end of the second end arm.

[0016] Preferably, there are two threaded holes and two support bolts, which are evenly distributed on the upper surface of the auxiliary support block.

[0017] Preferably, it also includes an auxiliary support column, the lower surface of the end of the first end arm is an arc surface, the auxiliary support column supports the lower surface of the end of the first end arm and is fastened to the base plate.

[0018] Preferably, the upper surface of the base plate is provided with a positioning groove four, the auxiliary support column is fastened to the positioning groove four, and its side wall surface is in contact with the side wall surface of the positioning groove four.

[0019] Preferably, it also includes a second support bolt, and the upper end face of the auxiliary support column is provided with a second threaded hole. The stud of the second support bolt is screwed to the second threaded hole. The top of the nut of the second support bolt is a pointed tip, which supports the lower surface of the end of the first end arm.

[0020] Preferably, it also includes a screw, one end of which is fastened to the base plate, and the other end of which is fastened to the pressure plate.

[0021] As can be seen from the above technical solution, compared with the prior art, the present utility model discloses a rotating arm horizontal machining tooling, which has the following beneficial effects: In the positioning process of the rotating arm, after the positioning hole and the positioning column are first inserted and matched, the rotating arm only needs to be rotated to insert and match the limiting strip block with the limiting groove opened at the upper end of the angular positioning block, so as to complete the rapid positioning of the rotating arm. It has the characteristics of simple operation and rapid positioning. Attached Figure Description

[0022] Figure 1 A schematic diagram of the assembly of a rotary arm horizontal machining tooling and a rotary arm provided for this utility model;

[0023] Figure 2 A three-dimensional schematic diagram of the rotating arm provided by this utility model;

[0024] Figure 3 A three-dimensional schematic diagram of a rotary arm horizontal machining fixture provided by this utility model;

[0025] Figure 4 An exploded view of a rotary arm horizontal machining fixture provided by this utility model;

[0026] Figure 5 A three-dimensional schematic diagram of the base plate provided by this utility model;

[0027] Figure 6 This is a three-dimensional schematic diagram of the angular positioning block provided by this utility model.

[0028] Wherein: 1-Rolling arm; 2-Base plate; 3-Main support block; 4-Angular positioning block; 5-Pressure plate; 10-Rolling arm body; 11-First end arm; 12-Second end arm; 13-Positioning hole; 14-Limiting strip; 15-Support leg; 21-Positioning groove one; 22-Positioning groove two; 23-Positioning groove three; 24-Positioning groove four; 41-Limiting groove; 61-Auxiliary support block; 62-Support bolt one; 71-Auxiliary support column; 72-Support bolt two. Detailed Implementation

[0029] 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.

[0030] See appendix Figure 1-6 This utility model discloses a horizontal machining fixture for clamping a rotating arm 1. The rotating arm 1 includes a rotating arm body 10 and a first end arm 11 and a second end arm 12 disposed on both sides of the rotating arm body 10. A positioning hole 13 is provided at the bottom end of the rotating arm body 10. A limit block 14 is fixed on the bottom surface of the first end arm 11. The fixture includes: a base plate 2, a main support block 3, an angular positioning block 4, and a pressure plate 5.

[0031] The main support block 3 is fastened to the upper plate surface of the base plate 2. The upper end surface of the main support block 3 contacts and abuts against the lower end surface of the swing arm body 10. A positioning post 31 is fixedly connected to the center position of the upper end surface of the main support block 3. The cylindrical surface of the positioning post 31 is positioned and matched with the positioning hole 13.

[0032] The angular positioning block 4 is fastened to the upper plate surface of the base plate 2, and the upper end surface of the angular positioning block 4 is provided with a limiting groove 41 that corresponds to and is adapted to engage with the limiting strip 14.

[0033] The lower surface of the pressure plate 5 contacts and abuts against the upper surface of the first end arm 11. The pressure plate 5 is located on both sides of the first end arm 11 and is detachably connected to the base plate 2.

[0034] Specifically, multiple support legs 15 are evenly arranged at the bottom of the swing arm body 10 and around the positioning hole 13. The lower end faces of the multiple support legs 15 are located on the same plane and are the horizontal reference plane of the swing arm 1. The lower end faces of the multiple support legs 15 are in contact with the upper end face of the main support block 3. The axis of the positioning hole 13 is parallel to the height direction of the swing arm body 10.

[0035] In some embodiments, the upper surface of the base plate 2 is provided with a positioning groove 21 and a positioning groove 22. The main support block 3 is fastened to the positioning groove 21, and its side wall is in contact with the side wall of the positioning groove 21. The angular positioning block 4 is fastened to the positioning groove 22, and its side wall is in contact with the side wall of the positioning groove 22. Thus, the positioning grooves 21 and 22 provided on the base plate 2 facilitate the installation and positioning of the main support block 3 and the angular positioning block 4, enabling the main support block 3 and the angular positioning block 4 to be connected to the base plate more accurately and stably.

[0036] In other embodiments, an auxiliary support block 61 is also included. The lower surface of the end of the second end arm 12 is a plane. The auxiliary support block 61 supports the lower surface of the end of the second end arm 12 and is fastened to the base plate 2.

[0037] In one embodiment, a positioning groove 23 is provided on the upper surface of the base plate 2, and the auxiliary support block 61 is fastened to the positioning groove 23, and its side wall is in contact with the side wall of the positioning groove 23.

[0038] In one embodiment, a support bolt 62 is further included. A threaded hole is provided on the upper end face of the auxiliary support block 61. The stud of the support bolt 62 is screwed into the threaded hole, and the nut of the support bolt 62 supports the lower surface of the end of the second end arm 12. Thus, the lower surface of the end of the second end arm 12 can be adjusted by means of the support bolt 62.

[0039] In some embodiments, there are two threaded holes and two support bolts 62, which are evenly distributed on the upper end face of the auxiliary support block 61. Thus, the two threaded holes and two support bolts 62 are evenly distributed on the upper end face of the auxiliary support block 61, which enables the support force to be more evenly distributed on the lower end surface of the second end arm 12, avoiding deformation of the swing arm 1 or machining errors caused by uneven support force.

[0040] In this embodiment, an auxiliary support column 71 is also included. The lower surface of the end of the first end arm 11 is an arc surface. The auxiliary support column 71 supports the lower surface of the end of the first end arm 11 and is fastened to the base plate 2.

[0041] In some specific embodiments, a positioning groove 24 is provided on the upper surface of the base plate 2, and the auxiliary support column 71 is fastened to the positioning groove 24, and its side wall is in contact with the side wall of the positioning groove 24.

[0042] In some specific embodiments, a second support bolt 72 is also included. A threaded hole 2 is provided on the upper end face of the auxiliary support column 71. The stud of the second support bolt 72 is screwed into the threaded hole 2. The nut of the second support bolt 72 has a pointed tip, which supports the lower surface of the end of the first end arm 11. Thus, the lower surface of the arc-shaped end of the first end arm 11 can be supported by the second support bolt 72 with its pointed tip, and the support of the lower surface of the end of the first end arm 11 by the second support bolt 72 is adjustable.

[0043] In some other specific embodiments, a screw 8 is also included. One end of the screw 8 is fastened to the base plate 2, and the other end of the screw 8 is fastened to the pressure plate 5. Specifically, the pressure plate 5 has screw holes on both sides of the first end arm 11. There are two screws 8. The bottom ends of the two screws 8 are fastened to the base plate 2, and the top ends of the two screws 8 pass through the two screw holes of the pressure plate 5 respectively, and are locked to the pressure plate 5 by nuts.

[0044] The specific principle and usage method of the rotary arm horizontal machining fixture provided in this embodiment are as follows:

[0045] 1. Place the main body 10 of the swing arm 1 on the upper surface of the main support block 3, align the positioning hole 13 at the bottom of the swing arm 10 with the positioning post 31 on the main support block 3 and insert it, ensuring that the cylindrical surface of the positioning post 31 fits tightly with the positioning hole 13, thereby completing the horizontal and vertical positioning of the swing arm 1.

[0046] 2. Align and insert the limiting strip 14 at the bottom of the first end arm 11 of the rotating arm 1 with the limiting groove 41 on the upper surface of the angular positioning block 4, ensuring that the limiting strip 14 and the limiting groove 41 are tightly engaged, so as to complete the positioning of the rotating arm 1 in the length direction.

[0047] 3. Adjust the exposed length of support bolt 62 and support bolt 72 to support the lower surface of the end of the second end arm 12 and the lower surface of the end of the first end arm 11, respectively.

[0048] 4. By tightening the nut on the screw 8, the pressure plate 5 presses down on the upper surface of the first end arm 11 to ensure that the rotating arm 1 remains stable during processing.

[0049] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. A horizontal machining fixture for clamping a rotating arm (1), the rotating arm (1) comprising a rotating arm body (10) and a first end arm (11) and a second end arm (12) disposed on both sides of the rotating arm body (10), wherein a positioning hole (13) is provided at the bottom end of the rotating arm body (10), and a limit block (14) is fixed to the bottom surface of the first end arm (11), characterized in that, include: Base plate (2); The main support block (3) is fastened to the upper plate surface of the base plate (2). The upper end surface of the main support block (3) is in contact with the lower end surface of the rotating arm body (10). A positioning column (31) is fixedly connected to the center of the upper end surface of the main support block (3). The cylindrical surface of the positioning column (31) is positioned and engaged with the positioning hole (13). An angular positioning block (4) is fastened to the upper surface of the base plate (2). The upper end surface of the angular positioning block (4) is provided with a limiting groove (41) that corresponds to and is adapted to engage with the limiting strip (14). The pressure plate (5) has its lower surface in contact with the upper surface of the first end arm (11). The pressure plate (5) is located on both sides of the first end arm (11) and is detachably connected to the base plate (2).

2. The rotary arm type machining tooling fixture according to claim 1, wherein, The upper surface of the base plate (2) is provided with positioning groove one (21) and positioning groove two (22). The main support block (3) is fastened to the positioning groove one (21), and its side wall is in contact with the side wall of the positioning groove one (21). The angular positioning block (4) is fastened to the positioning groove two (22), and its side wall is in contact with the side wall of the positioning groove two (22).

3. The rotary arm processing tooling fixture of claim 1, wherein, It also includes an auxiliary support block (61), the lower surface of the end of the second end arm (12) is a plane, the auxiliary support block (61) supports the lower surface of the end of the second end arm (12) and is fastened to the base plate (2).

4. The rotary arm type machining tooling fixture according to claim 3, wherein, The upper surface of the base plate (2) is provided with a positioning groove three (23), the auxiliary support block (61) is fastened to the positioning groove three (23), and its side wall surface contacts and abuts against the side wall surface of the positioning groove three (23).

5. The rotary arm horizontal machining fixture according to claim 4, characterized in that, It also includes a support bolt (62), and the upper end face of the auxiliary support block (61) is provided with a threaded hole. The stud of the support bolt (62) is screwed to the threaded hole, and the nut of the support bolt (62) supports the lower surface of the end of the second end arm (12).

6. The rotary arm horizontal machining fixture according to claim 5, characterized in that, The number of the threaded hole and the support bolt (62) is two, and they are evenly distributed on the upper end face of the auxiliary support block (61).

7. The rotary arm processing tooling fixture of claim 1, wherein, It also includes an auxiliary support column (71), the lower surface of the end of the first end arm (11) is an arc surface, the auxiliary support column (71) supports the lower surface of the end of the first end arm (11) and is fastened to the base plate (2).

8. The rotary arm processing tooling of claim 7, wherein, The upper surface of the base plate (2) is provided with a positioning groove four (24), the auxiliary support column (71) is fastened to the positioning groove four (24), and its side wall surface is in contact with the side wall surface of the positioning groove four (24).

9. The rotary arm processing tooling of claim 7, wherein, It also includes a second support bolt (72), and the upper end face of the auxiliary support column (71) is provided with a second threaded hole. The stud of the second support bolt (72) is connected to the second threaded hole. The top of the nut of the second support bolt (72) is a pointed tip, which supports the lower surface of the end of the first end arm (11).

10. The rotary arm processing tooling fixture of claim 1, wherein, Also included is a screw rod (8), one end of which is fastened to the bottom plate (2), and the other end of which is fastened to the pressing plate (5).

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