Special fixture for machining bracket type iron castings in numerical control machining center

Abstract

The utility model provides a special fixture for machining bracket type iron castings in a numerical control machining center, and effectively solves the problems that the milling operation requirement of two side surfaces can be met by clamping actions on two sides of the conventional fixture, the machining efficiency needs to be further improved, and the automation degree is low. According to the technical scheme for solving the problems, the device comprises a rectangular base, a plurality of evenly-distributed threaded holes are formed in the base, and studs are screwed in part of the threaded holes; a rectangular box with an upward opening is arranged above the middle of the base, small plates are arranged on the front side and the rear side of the rectangular box and fixed to the base, a worm and gear mechanism is installed at the upper end of one small plate, a center shaft of a worm gear and the rectangular plate are fixed together, and a worm is rotationally connected to the small plate. A plurality of compression screws are arranged on the peripheral side walls of the rectangular box; the milling clamp is ingenious in structure, two end faces can be milled through one-time clamping, the machining efficiency is greatly improved, meanwhile, automatic control is facilitated, and the current production requirement is met.

Description

A special fixture for machining support-type cast iron parts in CNC machining centers Technical Field

[0001] This utility model relates to the technical field of cast iron brackets, and in particular to a special fixture for CNC machining centers to process cast iron brackets. Background Technology

[0002] Cast iron brackets are widely used in the automotive industry, especially in trucks with high load-bearing requirements. As shown in Figure 1, after casting, the bracket requires milling on both sides. Commonly used fixtures can only lay the bracket flat, clamp it with bolts and locating blocks, and then perform milling. The other side is machined in the same way. This requires two clamping operations, severely impacting production efficiency. Existing technologies include flipping fixtures, such as the double-sided flipping fixture disclosed in patent document CN216127217U, but for a single part, two clamping operations are still required, indicating that efficiency needs further improvement and the level of automation is low.

[0003] To solve the above problems, a special fixture for machining bracket-type cast iron parts in CNC machining centers is provided. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a special fixture for machining bracket-type cast iron parts in CNC machining centers. It effectively solves the problems of existing fixtures requiring clamping action on both sides to complete the milling operation on both sides, resulting in low machining efficiency and low automation.

[0005] The technical solution includes a rectangular base with multiple evenly distributed threaded holes, some of which have studs screwed into them; a rectangular box with an upward opening at the top center of the base, with small plates on the front and back sides of the rectangular box, which are fixed to the base; a worm gear mechanism is installed on the upper part of one of the small plates, where the central shaft of the worm gear is fixed to the rectangular plate, and the worm is rotatably connected to the small plate. The rotation of the worm gear can drive the rectangular box to flip through the worm gear; multiple clamping screws are provided on the four side walls of the rectangular box, which can fix the parts inside the rectangular box.

[0006] Furthermore, a motor is connected to the worm gear, and the motor is fixed to the small plate.

[0007] Furthermore, a bearing is installed between the central shaft of the worm gear and the small plate.

[0008] This utility model has a clever structure that enables milling of both ends with a single clamping, greatly improving processing efficiency and facilitating automated control, thus meeting current production needs. Attached Figure Description

[0009] Figure 1 is a structural diagram of a bracket-type cast iron component.

[0010] Figure 2 is a perspective view of this utility model.

[0011] Figure 3 is a front view of this utility model.

[0012] Figure 4 is a side view of this utility model.

[0013] Figure 5 is a top view of this utility model. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] As shown in Figures 1 to 5, this utility model includes a rectangular base 1 with multiple evenly distributed threaded holes 2 on the base 1, some of which have studs 3 screwed into them; a rectangular box 4 with an upward opening is located above the center of the base 1, and small plates 5 are located on the front and rear sides of the rectangular box 4. The small plates 5 are fixed to the base 1, and a worm gear mechanism is installed on the upper end of one of the small plates 5. The central shaft of the worm gear 6 is fixed to the rectangular plate, and the worm 7 is rotatably connected to the small plate 5. The rotation of the worm 7 can drive the rectangular box 4 to flip via the worm gear 6; multiple clamping screws 8 are provided on the four side walls of the rectangular box 4, which can fix the parts inside the rectangular box 4.

[0016] To achieve automatic rotation, a motor is connected to the worm gear 7, and the motor is fixed on the small plate 5.

[0017] To reduce friction, a bearing is installed between the central shaft of the worm gear 6 and the small plate 5.

[0018] It is worth noting that by rotating the stud 3 in this solution, the height of the upper end of the stud 3 can be adjusted, thereby realizing the raising and lowering of the stud 3 and adapting to the processing of parts of different specifications. The number of studs 3 can be flexibly adjusted as needed to meet the processing requirements of the parts.

[0019] In use, the bottom of the part shown in Figure 1 is placed inside the rectangular box 4, and the part is fixed in place by the clamping screw 8. At this time, the motor rotates and drives the rectangular box 4 to rotate to one side through the worm gear 6 and worm 7 mechanism until the part is horizontal. At this time, the stud 3 presses against the lower side of the part, making the entire part secure. Then the milling cutter of the machining center can perform milling operations on the upper part of the part. After one side of the part is processed, the motor reverses until the part flips to the other side and is horizontal. The process is the same as above, realizing the milling operation on the second side of the part. Finally, the motor starts again to drive the rectangular box 4 to return to its original position, the clamping screw 8 is tightened and the part is taken out to process the next part.

[0020] In the above process, only one clamping action is needed, along with the flipping of the rectangular box 4, to achieve double-sided milling of the bracket-type cast iron parts, reducing manual labor, greatly improving the degree of automation, and helping to improve processing efficiency.

[0021] This utility model has a clever structure that enables milling of both ends with a single clamping, greatly improving processing efficiency and facilitating automated control, thus meeting current production needs.

Claims

1. A special fixture for machining support-type cast iron parts in a CNC machining center, characterized in that, The device includes a rectangular base (1) with multiple evenly distributed threaded holes (2) on the base (1), some of which have studs (3) screwed into them; a rectangular box (4) with an upward opening is located above the middle of the base (1), and small plates (5) are located on the front and rear sides of the rectangular box (4). The small plates (5) are fixed on the base (1), and a worm gear mechanism is installed on the upper end of one of the small plates (5). The central axis of the worm gear (6) is fixed to the rectangular plate, and the worm (7) is rotatably connected to the small plate (5). The rotation of the worm (7) via the worm gear (6) can drive the rectangular box (4) to flip; multiple clamping screws (8) are provided on the four sides of the rectangular box (4), and the clamping screws (8) can fix the parts inside the rectangular box (4).

2. A special fixture for machining support-type cast iron parts in a CNC machining center according to claim 1, characterized in that, The worm gear (7) is connected to a motor, which is fixed on the small plate (5).

3. A special fixture for machining support-type cast iron parts in a CNC machining center according to claim 1 or 2, characterized in that, A bearing is installed between the central shaft of the worm gear (6) and the small plate (5).

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