Threaded hole machining tool for intermediate axle A-shaped frame
By designing a dedicated tooling for machining threaded holes in the A-frame of the bridge, the problem of machining errors caused by insufficient employee experience and unsuitable parts was solved, achieving efficient and precise threaded hole machining, improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202423056188.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In the existing technology, the machining of threaded holes in the A-type frame of the bridge suffers from problems such as inaccurate positioning due to insufficient employee experience, low efficiency due to unsuitable part dimensions, and machining errors due to numerous measurement dimensions and angles.
Design a special tooling that includes a support base, a positioning mechanism, and a guiding mechanism. The support base and the positioning mechanism work together to clamp and position the A-frame of the middle bridge, and the guiding mechanism provides guiding assistance to achieve precise machining of threaded holes.
It improved the production efficiency of machining threaded holes in the A-type frame of the bridge, reduced the time spent by personnel for clamping and auxiliary work, ensured machining accuracy, shortened the construction period, and reduced production costs.
Smart Images
Figure CN223572572U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a tooling for machining threaded holes in a middle bridge A-frame. Background Technology
[0002] The A-frame of the middle bridge is used on off-highway mining vehicles. Threaded holes need to be machined at fixed positions on the side walls of its circular ring. Currently, there is no dedicated tooling for machining threaded holes in A-frames. Existing tooling involves using temporary accessories on machine tools for single-piece, discontinuous machining. This method has many limitations, such as inaccurate workpiece positioning due to insufficient worker experience, leading to machining errors; the random availability of accessories for workpiece positioning and clamping, resulting in unsuitable accessory dimensions requiring pre-machining of the accessories and reduced machining efficiency; and machining errors caused by numerous measurements and angles necessitate subsequent remedial measures to eliminate these errors, further reducing machining efficiency. To address these issues, a dedicated tooling for machining threaded holes in A-frames needs to be designed. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to design a tooling for machining threaded holes in a bridge A-frame, in order to solve the technical problems mentioned in the background art, such as inaccurate workpiece positioning due to insufficient employee experience, resulting in workpiece machining errors; reduced machining efficiency due to the need to pre-process accessories because of unsuitable accessory dimensions; and reduced machining efficiency due to machining errors caused by numerous measured dimensions and angles.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: a tooling for machining threaded holes in a middle bridge A-frame, comprising: a middle bridge A-frame, a support base, a positioning mechanism, and a guiding mechanism. The middle bridge A-frame is composed of a base, a supporting inclined beam, and an annular connecting part. There are two supporting inclined beams, and the upper parts of the two supporting inclined beams are connected by the annular connecting part. The bottom of each supporting inclined beam is provided with a base. The upper part of the support base is provided with a positioning mechanism, and the upper part of the positioning mechanism is provided with a guiding mechanism. The guiding mechanism, the positioning mechanism, and the support base are integrated. The support base cooperates with the side wall of the intersection of the two supporting inclined beams of the middle bridge A-frame. The positioning mechanism cooperates with the annular connecting part of the middle bridge A-frame. The middle bridge A-frame is clamped and positioned by the support base and the positioning mechanism, and threaded holes are machined on the side wall of the annular connecting part. The guiding mechanism provides guiding assistance for machining.
[0005] The support base includes a base plate, vertical ribs, adjusting bolts, fixing bolts, and a support plate. The base plate is horizontally fixed to the machine tool's worktable. Two vertical ribs of different heights are vertically arranged on both sides of the upper surface of the base plate. The tops of the two vertical ribs are connected to the two ends of the support plate. The support plate is a rectangular plate structure with an inclined arrangement. The fixing bolts are located in the middle of the base plate to fix the base plate to the worktable. The bottom surface of the support plate has a threaded through hole in the middle, and the adjusting bolt is installed in the threaded through hole.
[0006] The bottom of the adjusting bolt passes through the upper surface of the support plate and contacts the side wall at the connection of the two supporting inclined beams of the middle bridge A-frame. The tilt angle of the middle bridge A-frame is finely adjusted by adjusting the adjusting bolt.
[0007] The positioning mechanism includes a positioning plate, a positioning cylinder, a pressure plate, and a locking bolt. The positioning plate is vertically positioned on the outer edge of the upper surface of the support plate. The upper surface of the positioning plate has an arc-shaped edge, and the bottom edge has a bevel that matches the bevel of the support plate. The inner end face of the positioning plate has a positioning cylinder, the diameter of which matches the inner diameter of the annular connecting part. A threaded countersunk hole is provided at the center of the end face of the positioning cylinder. The pressure plate is a circular plate structure with a through hole at its center. The locking bolt passes through the through hole of the pressure plate and is threadedly connected to the threaded countersunk hole on the positioning cylinder.
[0008] The guiding mechanism includes a drill template and a drill sleeve. The drill template is a rectangular plate structure. One end of the drill template is connected to the vertex of the arc edge of the positioning plate. A through hole is provided in the middle of the drill template. The drill sleeve is embedded in the through hole. The drill sleeve and the drill template are interference fit. The drill sleeve is used to guide the workpiece during processing.
[0009] The beneficial effects of this utility model are: it solves the need for mass production of threaded holes in A-type bridge frames; by using this tooling on existing machine tools, it improves production efficiency, reduces personnel loading and unloading time, and achieves high precision, short production time, and low cost. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the present invention during processing.
[0011] Figure 2 This is a schematic diagram of the tooling for machining threaded holes according to this utility model.
[0012] Figure 3 This is a schematic diagram of the A-frame of the middle bridge of this utility model.
[0013] In the diagram: 1. Middle bridge A-frame, 101. Supporting inclined beam, 102. Circular connection part, 103. Base, 104. Threaded hole, 2. Vertical rib, 3. Base plate, 4. Adjusting bolt, 5. Fixing bolt, 6. Support plate, 7. Pressure plate, 8. Locking bolt, 9. Positioning column, 10. Positioning plate, 11. Drill template, 12. Drill sleeve. Detailed Implementation
[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0015] Please see Figures 1-3A tooling for machining threaded holes in a mid-bridge A-frame includes: a mid-bridge A-frame 1, a support base, a positioning mechanism, and a guiding mechanism. The mid-bridge A-frame 1 consists of a base 103, a supporting inclined beam 101, and an annular connecting portion 102. There are two supporting inclined beams 101, connected at their upper parts by the annular connecting portion 102. Each supporting inclined beam 101 has a base 103 at its bottom. The support base has a positioning mechanism on its upper part, and the positioning mechanism has a guiding mechanism on its upper part. The guiding mechanism, positioning mechanism, and support base are integrated. The support base engages with the sidewall of the intersection of the two supporting inclined beams 101 of the mid-bridge A-frame 1. The positioning mechanism engages with the annular connecting portion 102 of the mid-bridge A-frame 1. The support base and positioning mechanism clamp and position the mid-bridge A-frame 1, machining threaded holes 104 on the sidewall of the annular connecting portion 102. The guiding mechanism provides guidance for machining the threaded holes 104. The support base includes a base plate 3, vertical ribs 2, adjusting bolts 4, fixing bolts 5, and a support plate 6. The base plate 3 is horizontally fixed to the machine tool's worktable. Two vertical ribs 2 of different heights are vertically arranged on both sides of the upper surface of the base plate 3. The tops of the two vertical ribs 2 are connected to the two ends of the support plate 6. The support plate 6 is a rectangular plate structure with an inclined arrangement. The fixing bolts 5 are located in the middle of the base plate 3 to fix the base plate 3 to the worktable. The bottom surface of the support plate 6 has a threaded through hole in the middle, and the adjusting bolt 4 is installed in the threaded through hole. The bottom of the adjusting bolt 4 passes through the upper surface of the support plate 6 and contacts the side wall at the connection of the two supporting inclined beams 101 of the middle bridge A-frame 1. The tilt angle of the middle bridge A-frame 1 is finely adjusted by adjusting the adjusting bolt 4. The positioning mechanism includes a positioning plate 10, a positioning cylinder 9, a pressure plate 7, and a locking bolt 8. The positioning plate 10 is vertically positioned on the outer edge of the upper surface of the support plate 6. The upper end of the positioning plate 10 has an arc-shaped edge, and the bottom edge has a bevel that matches the bevel of the support plate 6. The inner end face of the positioning plate 10 is provided with a positioning cylinder 9. The diameter of the positioning cylinder 9 matches the inner diameter of the annular connecting part 102. A threaded countersunk hole is provided at the center of the end face of the positioning cylinder 9. The pressure plate 7 is a circular plate structure with a through hole at its center. The locking bolt 8 passes through the through hole of the pressure plate 7 and is threadedly connected to the threaded countersunk hole on the positioning cylinder 9. The guiding mechanism includes a drill template 11 and a drill sleeve 12. The drill template 11 is a rectangular plate structure. One end of the drill template 11 is connected to the vertex of the arc edge of the positioning plate 10. A through hole is provided in the middle of the drill template 11. The drill sleeve 12 is embedded in the through hole. The drill sleeve 12 and the drill template 11 are interference fit. The drill sleeve 12 is used to guide the workpiece during processing.
[0016] During the use of this utility model:
[0017] After placing the base plate 3 in a suitable position on the machining work platform, fix the support base to the worktable with the locking bolts 5. Fit the annular connecting part 102 of the A-frame 1 to be machined onto the positioning cylinder 9, with its end face fitting against the end face of the positioning plate 10. Fine-tune the angle of the A-frame 1 using the positioning bolts 4 to ensure the positioning angle during the machining of the threaded hole 104. After adjusting the angle, use the pressure plate 7 and locking bolts 8 to press and lock it through the countersunk holes on the end face of the positioning cylinder 9. The drill template 11 on the positioning plate 10 is first welded and then... Drilling is then performed to reduce errors. During machining, the inner end face of the positioning plate 10 and the outer circular face of the positioning cylinder 9 are used as references to determine the position of the hole. The through hole on the drilling template 11 and the drill sleeve 12 are interference fit. After completing the above preparations, drilling and tapping are performed through the drill sleeve 12, so that the positional accuracy of the threaded hole 104 of the machined middle bridge A-type frame 1 is higher, which meets the dimensional tolerance requirements of the finishing drawings. This facilitates the rapid subsequent dimensional inspection and flaw detection processes, thereby shortening the production cycle, reducing production costs, and eliminating unnecessary rework caused by excessive machining errors.
[0018] 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.
[0019] The parts of this utility model not described in detail are existing technologies.
Claims
1. A tooling for machining threaded holes in a middle bridge A-frame, comprising: The A-frame (1) of the middle bridge, the support base, the positioning mechanism and the guide mechanism are characterized in that: the A-frame (1) of the middle bridge is composed of a base (103), a support inclined beam (101) and an annular connecting part (102). There are two support inclined beams (101). The upper parts of the two support inclined beams (101) are connected by the annular connecting part (102). The bottom of each support inclined beam (101) is provided with a base (103). The support base is provided with a positioning mechanism on the upper part. The positioning mechanism is provided with a guide mechanism on the upper part. The guide mechanism and the positioning mechanism are integrated with the support base. The support base cooperates with the side wall of the intersection of the two support inclined beams (101). The positioning mechanism cooperates with the ring body of the annular connecting part (102). The A-frame (1) of the middle bridge is clamped and positioned by the support base and the positioning mechanism. Threaded holes (104) are processed on the side wall of the annular connecting part (102). The guide mechanism provides guidance assistance for processing.
2. The tooling for machining threaded holes in a type A bridge as described in claim 1, characterized in that: The support base includes a base plate (3), vertical ribs (2), adjusting bolts (4), fixing bolts (5), and a support plate (6). The base plate (3) is horizontally fixed on the machine tool's workbench. Two vertical ribs (2) of different heights are vertically arranged on both sides of the upper surface of the base plate (3). The tops of the two vertical ribs (2) are connected to the two ends of the support plate (6). The support plate (6) is a rectangular plate structure with an inclined arrangement. The fixing bolts (5) are set in the middle of the base plate (3) to fix the base plate (3) on the workbench. The bottom surface of the support plate (6) is provided with a threaded through hole, and the adjusting bolts (4) are provided in the threaded through hole.
3. The tooling for machining threaded holes in a type A bridge as described in claim 2, characterized in that: The bottom of the adjusting bolt (4) passes through the upper surface of the support plate (6) and contacts the side wall at the connection of the two supporting inclined beams (101) of the middle bridge A-type frame (1). The tilt angle of the middle bridge A-type frame (1) is finely adjusted by adjusting the adjusting bolt (4).
4. The tooling for machining threaded holes in a type A frame (1) of a middle bridge according to claim 2, characterized in that: The positioning mechanism includes a positioning plate (10), a positioning cylinder (9), a pressure plate (7), and a locking bolt (8). The positioning plate (10) is vertically positioned on the outer edge of the upper surface of the support plate (6). The upper end of the positioning plate (10) has an arc-shaped edge, and the bottom edge has an inclined edge that matches the inclined surface of the support plate (6). The inner end face of the positioning plate (10) is provided with a positioning cylinder (9). The diameter of the positioning cylinder (9) matches the inner diameter of the annular connecting part (102). A threaded countersunk hole is provided at the center of the end face of the positioning cylinder (9). The pressure plate (7) is a circular plate structure. A through hole is provided at the center of the pressure plate (7). The locking bolt (8) is threadedly connected to the threaded countersunk hole on the positioning cylinder (9) after passing through the through hole of the pressure plate (7).
5. A tooling for machining threaded holes in a middle bridge A-frame according to claim 4, characterized in that: The guiding mechanism includes a drill template (11) and a drill sleeve (12). The drill template (11) is a rectangular plate structure. One end of the drill template (11) is connected to the vertex of the arc edge of the positioning plate (10). A through hole is provided in the middle of the drill template (11). The drill sleeve (12) is embedded in the through hole. The drill sleeve (12) and the drill template (11) are interference fit. The drill sleeve (12) is used to guide the workpiece during processing.