CN203817848U - Thin magnesium alloy die casting porous tapping machining fixture - Google Patents

Abstract

The utility model relates to a thin magnesium alloy die casting porous tapping machining clamp, which comprises a base, a support plate is arranged above the base, the support plate is supported on the base through a plurality of first support columns, a product positioning plate is arranged above the supporting plate, a plurality of abdicating holes for threading cutters to pass through are distributed on the product positioning plate, the product positioning plate is supported on the supporting plate through a plurality of second supporting columns, a surface shaping pressing plate is arranged above the product positioning plate, two throttling cylinders are fixed on the base, the piston of each throttling cylinder extends upwards axially, is fixedly connected with a surface shaping pressure plate through a universal joint, the surface shaping pressure plate is provided with a limiting guide post, the limiting guide pillar extends downwards to be in sliding fit with the supporting plate, and limiting adjusting cushion blocks used for limiting the surface shaping pressing plate are arranged at two ends, located on the product positioning plate, of the supporting plate respectively. The surface shaping plate makes the product casting fully contact with the surface shaping plate, the appearance is smooth, and the product flatness is good.

Description

Thin magnesium alloy die casting porous tapping machining fixture

technical field

The utility model relates to the field of magnesium alloy die-casting processing, in particular to a machining fixture for porous tapping machining of thin magnesium alloy die-casting parts.

Background technique

At present, thin magnesium alloy die-casting products are widely used in electronic products, such as magnesium alloy casings for notebook computers, tablet computers, mobile phones, and magnesium alloy mid-plate structural parts. The average thickness of these thin magnesium alloy die-casting parts is: 0.5~ 1.mm, while the area is relatively large. As the main skeleton of electronic products, magnesium alloy parts have extremely high flatness and dimensional tolerance requirements, and most of them will design small threaded holes with a diameter of M1.2~2.5mm for assembly and fixing. At present, the factory needs to do a lot of machining on thin magnesium alloy die-casting parts. Forming the threaded hole structure and removing the die-casting burrs and paving the meat structure requires the use of multi-position clamping fixtures to fix the product, which makes the product slightly deformed locally and causes drilling. When tapping, casting top convex, sliding teeth, chaotic teeth, poor verticality, etc. will also lead to poor flatness of the final product.

Contents of the invention

The purpose of this utility model is to provide a thin magnesium alloy die-casting porous tapping machining fixture for the deficiencies of the existing technology. It adjusts the compressed air in the throttling cylinder to make the product casting fully contact with the surface shaping plate and smooth the appearance. , so that the flatness of the product is good, so that the tool can ensure the precise position and size of the hole and the coaxiality of the bottom hole and the thread during the process of machining holes, so that the product castings do not have convex, slippery, or chaotic teeth, and achieve high-precision porous tapping It is suitable for magnesium alloy die-casting products with high precision hole positions and special precision dimension processing requirements for thin parts.

The technical solution of the utility model is: a thin magnesium alloy die-casting porous tapping machining fixture, including a base, a support plate is arranged above the base, and the support plate is supported on the base by a plurality of first pillars. A product positioning plate is arranged above the support plate, and a number of relief holes for tapping tools are distributed on the product positioning plate. The product positioning plate is supported on the support plate by a plurality of second pillars, so that the support plate and A space is left between the product positioning plates, and a surface shaping pressing plate is arranged on the top of the product positioning plate, and a number of relief holes for tapping tools are distributed on the surface shaping pressing plate, which are respectively connected with the product positioning plate. Corresponding to a number of relief holes for tapping tools to pass through, two throttle cylinders are fixed on the base, the piston of the throttle cylinder extends axially, and is fixedly connected with the surface shaping pressure plate through a universal joint, supporting Surface shaping pressing plate, the surface shaping pressing plate is provided with a limit guide post, and the limit guide post extends downward to slide and cooperate with the support plate, and the two ends of the support plate located on the product positioning plate are respectively provided with The limit adjustment block for the pressure plate to limit the position, and the limit adjustment block is higher than the product positioning plate.

The position-limiting guide post extends downwards and slides with the support plate through the linear bearing, and the linear bearing is installed on the support plate.

The support plate is provided with a relief through hole for the universal joint on the piston shaft of the throttle cylinder to pass through.

Two throttle cylinder positioning blocks are fixed on the base, and the two throttle cylinders are respectively fixed on the two throttle cylinder positioning blocks.

Handles are respectively fixed on the two ends of the base.

Compared with the prior art, the beneficial effect of the utility model is: because the thin magnesium alloy die-casting porous tapping machining fixture changes the direction of the compressed air through the throttling cylinder, the universal joint generates thrust or pull force, driving the surface The shaping pressing plate moves up and down, so that the surface shaping pressing plate and the product positioning plate can be precisely matched, so that the casting and the surface shaping plate can be fully contacted, and the appearance is smooth, so that the tool can ensure good flatness of the product during the process of machining holes, and make the precise position and size of the hole And the coaxiality of the bottom hole and the thread coincides, and the casting does not have convex, slippery, or chaotic teeth, so as to achieve the purpose of high-precision porous tapping.

The surface shaping pressing plate is provided with a limit guide post, and the limit guide post extends downward to slide and cooperate with the support plate, so that the surface shaping pressing plate is guided by the limit guide post during the movement process.

The two ends of the product positioning plate on the support plate are respectively provided with limit adjustment pads for limiting the surface shaping pressure plate, and the limit adjustment pads are higher than the product positioning plate. The limit adjustment block is used to prevent the surface shaping platen from overpressing the product on the product positioning plate due to inertia during the downward movement, thus causing the product to be deformed or even damaged.

Description of drawings

Fig. 1 is the perspective view of the utility model;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is a schematic diagram of direction A of Fig. 2;

Fig. 4 is a schematic diagram in direction B of Fig. 2;

Figure 5 is a schematic diagram of the product.

In the accompanying drawings, 1 is the base, 1a is the handle, 2 is the first pillar, 3 is the support plate, 4 is the second pillar, 5 is the product positioning plate, 6 is the surface shaping pressure plate, 7 is the relief hole, and 8 is the limiter. Position guide post, 9 is a linear bearing, 10 is a throttle cylinder, 11 is a universal joint, 12 is a throttle cylinder positioning block, 13 is a limit adjustment pad, and 14 is a product.

Detailed ways

Referring to Fig. 1 to Fig. 5, a fixture for machining thin magnesium alloy die-cast porous tappings includes a base 1, handles 1a are respectively fixed on both ends of the base 1 to facilitate moving the fixture. A support plate 3 is arranged above the base 1 , and the support plate 3 is supported on the base 1 by a plurality of first pillars 2 , so that there is enough clearance between the support plate 3 and the base 1 for installing the throttling cylinder 10 . A product positioning plate 5 is arranged on the top of the support plate 3, and a number of relief holes for tapping tools are distributed on the product positioning plate 5. The product positioning plate 5 is supported on the support plate by a plurality of second pillars 4. 3, make between the supporting plate 3 and the product positioning plate 5, there is an interval space for the movement stroke of the tapping tool. The top of the product positioning plate 5 is provided with a surface shaping pressing plate 6, and the surface shaping pressing plate 6 is distributed with some relief holes 7 for the passage of tapping tools, which are respectively connected with some holes 7 provided on the product positioning plate 5 for tapping. Corresponds to the relief hole through which the tool passes. The relief holes on the surface shaping pressing plate 6 and the product positioning plate 5 correspond to the holes to be processed of the product 14 respectively. The relief holes on the surface shaping pressing plate 6 and the product positioning plate 5 are set according to the distribution of the holes to be processed of the actual product 14 to be processed. The surface shaping pressing plate 6 and product positioning plate 5 corresponding to different products 14 may be different. Certainly also can be provided with the relief hole of a plurality of specifications on surface shaping pressing plate 6, product positioning plate 5, process multiple types of products 14 with same surface shaping pressing plate 6, product positioning plate 5. A relief hole for the protruding structure of the product 14 to pass may also be provided on the surface shaping pressing plate 6 . Two throttle cylinders 10 are fixed on the base 1 , two throttle cylinder positioning blocks 12 are fixed on the base 1 , and the two throttle cylinders 10 are respectively fixed on the two throttle cylinder positioning blocks 12 . The piston of the throttle cylinder 10 extends axially, and is fixedly connected to the surface shaping pressing plate 6 through a universal joint 11 to support the surface shaping pressing plate 6 and drive the surface shaping pressing plate 6 to move up and down to make the surface shaping pressing plate 6 Precisely cooperate with the product positioning plate 5, so that the casting and the surface shaping plate can be fully contacted, and the appearance is flat, so that the tool can ensure a good flatness of the product 14 during the process of machining holes, and ensure the precise position and size of the hole and the coaxiality of the bottom hole and the screw teeth Overlapping, the casting does not have convex, slippery, or chaotic teeth, and achieves the purpose of high-precision porous tapping. The surface shaping pressing plate 6 is provided with a limit guide post 8, and the limit guide post 8 extends downward to slide and cooperate with the support plate 3, so that the surface shaping pressing plate 6 is guided by the limit guide post 8 during the movement. Both ends of the product positioning plate 5 on the support plate 3 are respectively provided with limit adjustment pads 13 for limiting the surface shaping press plate 6 , and the limit adjustment pads 13 are higher than the product positioning plate 5 . The limit adjustment block 13 is used to prevent the product 14 on the product positioning plate 5 from being overpressed by the inertia of the surface shaping pressing plate 6 during the downward movement, thereby causing the product 14 to be deformed or even damaged. Preferably, the limiting guide post 8 extends downwards and slides with the support plate 3 through the linear bearing 9 , and the linear bearing 9 is installed on the support plate 3 . Of course, the position-limiting guide post 8 can also be slidably matched with the support plate 3 through a guide sliding sleeve. The support plate 3 is provided with a relief hole for the universal joint 11 on the piston shaft of the throttle cylinder 10 to pass through.

When working, change the direction of the compressed air through the throttling cylinder to make the universal joint generate thrust, push the surface shaping pressure plate upwards, and then put the casting on the product positioning plate. The air makes the universal joint generate tension, and pulls the surface shaping pressure plate downward to achieve the precise cooperation between the surface shaping pressure plate and the product positioning plate, so that the casting and the surface shaping plate are in full contact, and the appearance is smooth. When pulled to the best position, The limit adjustment cushion blocks the surface shaping pressure plate to prevent the surface shaping pressure plate from overpressure on the product. The throttle cylinder is controlled by the numerical control system on the numerical control machine tool. After the product is clamped, the product can be tapped through the relief hole on the surface shaping platen and the product positioning plate.

Claims (5)

1. A thin magnesium alloy die casting porous tapping machining fixture, characterized in that: it comprises a base, a support plate is arranged above the base, and the support plate is supported on the base by a plurality of first pillars, and the support A product positioning plate is arranged on the top of the plate, and a number of relief holes for tapping tools are distributed on the product positioning plate. The product positioning plate is supported on the support plate by a plurality of second pillars, so that the support plate and the product are positioned Spaces are left between the plates, and a surface shaping pressing plate is arranged on the top of the product positioning plate, and a number of relief holes for tapping tools are distributed on the surface shaping pressing plate, which are respectively connected with a number of relief holes provided on the product positioning plate. Corresponding to the relief hole for the tapping tool to pass through, two throttle cylinders are fixed on the base. The piston of the throttle cylinder extends axially, and is fixedly connected with the surface shaping pressure plate through a universal joint to support the surface shaping. Pressing plate, the surface shaping pressing plate is provided with a limit guide column, and the limiting guide column extends downward to slide and cooperate with the support plate, and the two ends of the product positioning plate on the support plate are respectively provided with The limit adjustment block is limited, and the limit adjustment block is higher than the product positioning plate. 2. The thin magnesium alloy die casting porous tapping machining fixture according to claim 1, characterized in that: the limit guide post extends downwards and slides with the support plate through a linear bearing, and the linear bearing is installed on the support plate board. 3. The thin magnesium alloy die casting porous tapping machining fixture according to claim 1 or 2, characterized in that: the support plate is provided with a relief for the universal joint on the piston shaft of the throttle cylinder to pass through Via. 4. The thin magnesium alloy die-casting porous tapping machining fixture according to claim 1, characterized in that: two throttle cylinder positioning blocks are fixed on the base, and the two throttle cylinders are respectively fixed on two joints. on the positioning block of the air cylinder. 5 . The jig for machining thin magnesium alloy die-cast porous tappings according to claim 1 , wherein handles are respectively fixed on the two ends of the base. 5 .